Two-stage linkage automatic lock device with pre-locking function

Abstract

The utility model relates to the technical field of door locks, in particular to a two-stage linkage automatic lock device with a pre-locking function, a lock wheel is provided with an upper jaw, a lower jaw and a connecting part, the upper jaw is matched with a lock hole in a lock hook, a sliding part is arranged on the lock wheel, and a clamping part is arranged at the tail end of the sliding part; the pawl comprises locking teeth, protruding teeth and connecting teeth, and the inner sides of the locking teeth are in lap joint with the surface of the sliding part of the lock wheel to form an initial state; a pre-locking groove matched with the clamping part is formed in the side, in lap joint with the sliding part, of the locking tooth, and the locking wheel rotates to enable the clamping part to be matched with the pre-locking groove to form a pre-locking state; the clamping part of the lock wheel is clamped in the pre-locking groove of the pawl to form a pre-locking state, and the lock wheel cannot rotate reversely, so that the situation that the upper jaw of the lock wheel is separated from the lock hole in the lock hook due to the fact that the lock hook ascends is avoided; therefore, the situation that the upper jaw of the lock wheel cannot hook the lock hook on the machine cover is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to door lock technical field, concretely relates to a two-stage linkage automatic lock device with prelocking. BACKGROUND

[0002] In prior art patent with the patent name of a kind of intelligent door lock device, patent No.: 201420116441.3 is combined to realize automatic opening machine cover and closing machine cover when using, there is following problem to be solved, electric push rod needs to be powered off before machine cover approaches complete closure, to prevent that electric push rod in operation is blocked when machine cover is completely closed;But electric push rod is powered off, it will immediately rebound small distance under the action of its built-in spring force, and it will cause that the upper jaw of lock wheel cannot be hooked to the lock hook on machine cover, machine cover is not locked.Therefore, a two-stage linkage automatic lock device with prelocking needs to be developed, to further improve the operation convenience and reliability of centrifugal machine. CONTENT OF UTILITY MODEL

[0003] In view of the deficiency of prior art, the utility model provides a two-stage linkage automatic lock device with prelocking.

[0004] The two-stage linkage automatic lock device with prelocking of the utility model, including lock hook, lock body, transmission mechanism, driving mechanism and control circuit, the lock body includes lock support, the inside of lock support is rotatably connected with lock wheel through first pin shaft, is installed with pawl through second pin shaft, and lock wheel and pawl are connected through double-link torsional spring between;

[0005] Lock hole is formed on the lock hook;

[0006] The lock wheel is equipped with upper jaw, lower jaw and connecting portion, the upper jaw is matched with the lock hole on the lock hook, the sliding portion is equipped on the lock wheel, the clamping portion is formed on the end of sliding portion;

[0007] The pawl includes locking tooth, protruding tooth and connecting tooth, the inside of locking tooth is overlapped on the surface of sliding portion of lock wheel to form initial state;Lock wheel rotates to form locking state by the clamping portion and the top of locking tooth;

[0008] The lock hook drives lock wheel to rotate to locking state, the prelock groove that is matched with clamping portion is formed on the side of sliding portion that locking tooth is overlapped, lock wheel rotates to make clamping portion and prelock groove match to constitute prelocking state;

[0009] The lock support is equipped with gap for the insertion of lock hook, the stroke between the insertion of gap corresponds prelocking state and locking state, respectively forms stroke a, stroke b, the end point of stroke a and the end point of stroke b form stroke c;

[0010] The control circuit comprises a first switch for controlling the starting of the driving mechanism, which is installed inside the lock support, and the switch contact is located in the middle of the stroke c.

[0011] Further, the lower end of the lock hole is closed by a roller.

[0012] Further, the driving mechanism comprises a first lever, a second lever and an eccentric wheel which are rotatably installed on the front surface of the lock support, the top of the first lever is connected with the connecting part of the lock wheel through a connecting rod, the top of the second lever is provided with a movable hole, the inside of the movable hole is connected with the connecting tooth of the pawl through a connecting pin, and the eccentric wheel is located between the first lever and the second lever, and the rotation of the eccentric wheel drives the rotation of the first lever and the second lever.

[0013] Further, the driving mechanism is a micro motor for driving the rotation of the eccentric wheel.

[0014] The control circuit further comprises a second switch matched with the protruding tooth of the pawl, a position identifier matched with the eccentric wheel, and a main control board microprocessor connected with the first switch, the second switch, the position identifier and the micro motor.

[0015] Further, an electric push rod for driving the opening and closing of the cover is further comprised, and the electric push rod is closed through the closing of the first switch.

[0016] Compared with the prior art, the utility model has the advantages that:

[0017] In the utility model, the clamping part of the lock wheel is clamped in the pre-locking groove of the pawl to form a pre-locking state, and the lock wheel cannot be reversed, so that the upper jaw of the lock wheel is prevented from being separated from the lock hole in the lock hook due to the rising of the lock hook, and the situation that the upper jaw of the lock wheel cannot hook the lock hook on the cover is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0018] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application, the schematic embodiments and the description thereof are used to explain the present application, and do not constitute improper limitation on the present application. In the drawings:

[0019] Figure 1 It is a structure schematic view of the utility model installed on a centrifugal machine;

[0020] Figure 2 It is a structure schematic view of the utility model in a pre-locking state;

[0021] Figure 3 It is a structure schematic view of the utility model in a locking state;

[0022] Figure 4 It is a front structure schematic view of the utility model in a locking state.

[0023] Figure: 1, lock support; 101, notch;

[0024] 2, lock wheel; 21, upper jaw; 22, lower jaw; 23, sliding part; 24, clamping part; 25, connecting part;

[0025] 3, pawl; 31, locking teeth; 32, pre-locking groove; 33, protruding teeth; 34, connecting teeth;

[0026] 4, double torsion spring;

[0027] 5, first lever; 51, connecting rod;

[0028] 6, second lever; 61, movable hole;

[0029] 7, eccentric wheel; 8, micro motor; 9, lock hook; 91, lock hole; 92, roller; 10, first switch; 11, second switch; 12, position identifier; 13, electric push rod. DETAILED DESCRIPTION

[0030] The following will disclose several embodiments of the present application with drawings. For clear description, many details of the embodiments will be described below. However, it should be understood that these details of the embodiments should not be used to limit the present application. That is, in some embodiments of the present application, these details of the embodiments are not necessary. In addition, for the purpose of simplifying the drawings, some conventional structures and components will be shown in a simple schematic manner in the drawings.

[0031] In addition, in the present application, the description such as "first", "second" and the like is only for the purpose of description, and does not mean to particularly indicate the order or sequence, nor to limit the present application. It is merely for the purpose of distinguishing components or operations described by the same technical terms, and cannot be understood as indicating or implying the relative importance of the technical features indicated or the number of technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the person skilled in the art. When the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor is it within the protection scope required by the present application.

[0032] Please refer to Figure 1 - Figure 4 The two-stage linkage automatic lock device with pre-locking of the present application comprises a lock hook 9, a lock body, a transmission mechanism, a driving mechanism and a control circuit. The lock body comprises a lock support 1, the inside of the lock support 1 is rotatably connected with a lock wheel 2 through a first pin shaft, a pawl 3 is installed through a second pin shaft, and the lock wheel 2 and the pawl 3 are connected through a double torsion spring 4.

[0033] The lock hook 9 is provided with a lock hole 91;

[0034] The lock wheel 2 is provided with an upper jaw 21, a lower jaw 22 and a connecting part 25, the upper jaw 21 is matched with the lock hole 91 of the lock hook 9, the lock wheel 2 is provided with a sliding part 23, and the end of the sliding part 23 is provided with a clamping part 24;

[0035] The pawl 3 comprises a locking tooth 31, a protruding tooth 33 and a connecting tooth 34, the inner side of the locking tooth 31 is overlapped on the surface of the sliding part 23 of the lock wheel 2 to form an initial state; the clamping part 24 is clamped with the top of the locking tooth 31 to form a locking state by rotating the lock wheel 2;

[0036] The lock hook 9 pushes the lock wheel 2 to rotate to the locking state, the locking tooth 31 is overlapped on one side of the sliding part 23 and is provided with a pre-locking groove 32 matched with the clamping part 24, and the clamping part 24 is matched with the pre-locking groove 32 to form a pre-locking state by rotating the lock wheel 2;

[0037] The lock bracket 1 is provided with a notch 101 for inserting the lock hook 9, the stroke corresponding to the pre-locking state and the locking state when the lock hook 9 is inserted between the notches 101 is respectively formed as a stroke a and a stroke b, and the stroke a and the stroke b form a stroke c at the end points thereof;

[0038] The control circuit comprises a first switch 10 for controlling the start of the driving mechanism, the first switch 10 is installed in the inside of the lock bracket 1, and the switch contact piece is located in the middle of the stroke c.

[0039] Further, the lower end of the lock hole 91 is closed by a roller 92.

[0040] Specifically, the transmission mechanism comprises a first lever 5, a second lever 6 and an eccentric wheel 7 which are rotatably installed on the front face of the lock bracket 1, the top of the first lever 5 is connected with the connecting part 25 of the lock wheel 2 through a connecting rod 51, the top of the second lever 6 is provided with a movable hole 61, the inside of the movable hole 61 is connected with the connecting tooth 34 of the pawl 3 through a connecting pin, and the eccentric wheel 7 is located between the first lever 5 and the second lever 6, and the rotation of the eccentric wheel 7 makes the first lever 5 and the second lever 6 rotate.

[0041] Specifically, the driving mechanism is a micro motor 8 for driving the eccentric wheel 7 to rotate;

[0042] The sliding part 23 is in a circular arc shape.

[0043] Specifically, the control circuit further comprises a second switch 11 matched with the protruding tooth 33 of the pawl 3, two position identifiers 12 matched with the eccentric wheel 7, and a main control board microprocessor connected with the first switch 10, the second switch 11, the position identifiers 12 and the micro motor 8; and the two position identifiers 12 are respectively installed above and below the eccentric wheel 7.

[0044] Further, the electric push rod 13 for driving the hood to open and close is further included, and the electric push rod 13 is closed by the closing of the first switch 10.

[0045] When the utility model is used:

[0046] As Figure 1 shown, the lock hook 9 and the lock body are respectively installed on the hood and the machine body, when the electric push rod 13 pulls the hood to close, please refer to Figure 2 , the lock hook 9 is inserted from the gap 101 of the lock body and moves in-depth by the distance a, wherein the roller 92 contacts the lower jaw 22 of the lock wheel 2 and pushes the lock wheel 2 to rotate in the clockwise direction during the lock hook 9 moving in the gap 101 by the distance a, the sliding part 23 of the lock wheel 2 slides along the contact surface of the pawl 3 under the spring force pull of the double torsion spring 4, when the clamping part 24 of the lock wheel 2 slides into the pre-lock groove 32 of the pawl 3, the pre-lock state is entered;

[0047] After entering the pre-lock state, the lock hook 9 is moved to the stroke c by the pulling of the electric push rod 13, at this time, the side surface of the lock hook 9 will contact the switch contact piece of the first switch 10, the first switch 10 is closed, and the instruction that the electric push rod 13 is powered off and stops running is sent, after the electric push rod 13 is powered off, it will immediately rebound a small distance under the action of the built-in spring force, so that the lock hook 9 rises in the gap 101, and the rising of the lock hook 9 will make the lock wheel 2 reverse, however, because the clamping part 24 of the lock wheel 2 is clamped in the pre-lock groove 32 of the pawl 3 to form the pre-lock state, the lock wheel 2 cannot be reversed, so that the rising of the lock hook 9 causes the upper jaw 21 of the lock wheel 2 to be separated from the lock hole 91 in the lock hook 9 is avoided, so that the situation that the upper jaw 21 of the lock wheel 2 cannot hook the lock hook 9 on the hood occurs is avoided;

[0048] After the first switch 10 is closed, the micro motor 8 is started, the eccentric wheel 7 is driven to rotate by the micro speed reducer, the eccentric wheel 7 moves in the first half of the circle to push the first lever 5 to rotate, the lock wheel 2 is further rotated in the clockwise direction by the connecting rod 51, the upper jaw 21 of the lock hook 9 is hooked in the further rotating process, so that the lock hook 9 continues to move to the end point of the stroke c in the gap 101, so that the hood is closed;

[0049] When the lock hook 9 continues to move to the stroke c in the gap 101, the clamping part 24 of the lock wheel 2 will slide out of the pre-lock groove 32, and the pawl 3 rotates in the clockwise direction under the spring force pull of the double torsion spring 4, so that the locking teeth 31 automatically slide to be clamped with the clamping part 24 of the lock wheel 2, preventing the lock wheel 2 from reversing, at this time, the protruding teeth 33 of the pawl 3 press the switch contact piece of the second switch 11, the second switch 11 is closed, and the microprocessor of the main control panel receives the closed signal of the second switch 11, prompting that the door lock has been closed.

[0050] The eccentric wheel 7 continues to rotate to the neutral position between the first lever 5 and the second lever 6, when the position identifier 12 receives the signal (magnetic or photoelectric) of the sensor on the eccentric wheel 7, the micro motor 8 stops, and the automatic closing process of the door lock is completed.

[0051] When the opening instruction is input, the micro motor 8 drives the eccentric wheel 7 to continue to rotate, the second half of the movement of the eccentric wheel 7 pushes the second lever 6 to rotate, thereby driving the pawl 3 to rotate in the counterclockwise direction, the locking teeth 31 of the pawl 3 are away from the clamping part 24 of the lock wheel 2, the second switch 11 is automatically reset, the lock wheel 2 rotates in the counterclockwise direction under the spring force of the double torsion spring 4, the jaw 21 on the lock wheel 2 is out of the lock hole 91 of the lock hook 9, the first switch 10 is automatically reset, at this time the electric push rod 13 is powered on, and the push rod pushes the machine cover to automatically open. The eccentric wheel 7 continues to rotate to the reverse neutral position between the first lever 5 and the second lever 6, when the position identifier 12 receives the signal (magnetic or photoelectric) of the sensor on the eccentric wheel 7, the micro motor 8 stops, and the automatic opening process of the door lock is completed.

[0052] The above is only an embodiment of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made in the spirit and principle of the present application shall be included in the scope of the claims of the present application.

Claims

1. A two-stage linkage automatic lock device with pre-lock, comprising a lock hook (9), a lock body, a transmission mechanism, a driving mechanism and a control circuit; the lock body comprises a lock support (1), the inside of the lock support (1) is rotationally connected with a lock wheel (2) through a first pin shaft, is provided with a pawl (3) through a second pin shaft, and the lock wheel (2) and the pawl (3) are connected through a double-link torsion spring (4) between them; A lock hole (91) is formed on the lock hook (9); The lock wheel (2) is provided with an upper jaw (21), a lower jaw (22) and a connecting part (25), the upper jaw (21) is matched with the lock hole (91) on the lock hook (9), the lock wheel (2) is provided with a sliding part (23), and the end of the sliding part (23) is provided with a clamping part (24); The pawl (3) comprises a locking tooth (31), a protruding tooth (33) and a connecting tooth (34), the inside of the locking tooth (31) is overlapped on the surface of the sliding part (23) of the lock wheel (2) to form an initial state; the rotation of the lock wheel (2) makes the clamping part (24) and the top of the locking tooth (31) clamped to form a locking state; The locking hook (9) pushes the locking wheel (2) to rotate to the locking state, characterized in that: The locking tooth (31) overlapped on one side of the sliding part (23) is provided with a pre-lock groove (32) matched with the clamping part (24), and the rotation of the lock wheel (2) makes the clamping part (24) and the pre-lock groove (32) matched to form a pre-lock state; A gap (101) for inserting the lock hook (9) is formed on the lock support (1), the stroke of the lock hook (9) inserted into the gap (101) corresponds to the pre-lock state and the locking state, respectively forming a stroke a and a stroke b, and the end of the stroke a and the end of the stroke b form a stroke c; The control circuit comprises a first switch (10) for controlling the start of the driving mechanism, the first switch (10) is installed in the inside of the lock support (1), and the switch contact piece is located in the middle of the stroke c.

2. A two-stage interlocking automatic lock device with pre-locking according to claim 1, characterized in that: The lower end of the lock hole (91) is closed through a roller (92).

3. A two-stage interlocking automatic lock device with pre-locking according to claim 1 or 2, characterized in that: The transmission mechanism comprises a first lever (5), a second lever (6) and an eccentric wheel (7) rotationally installed on the front face of the lock support (1), the top of the first lever (5) is connected with the connecting part (25) of the lock wheel (2) through a connecting rod (51); the top of the second lever (6) is provided with a movable hole (61), the inside of the movable hole (61) is connected with the connecting tooth (34) of the pawl (3) through a connecting pin; the eccentric wheel (7) is located between the first lever (5) and the second lever (6), and the rotation of the eccentric wheel (7) makes the first lever (5) and the second lever (6) rotate.

4. A two-stage interlocking automatic lock device with pre-locking according to claim 3, characterized in that: The driving mechanism is a micro motor (8) for driving the rotation of the eccentric wheel (7).

5. A two stage linkage automatic lock device with pre-lock according to claim 4, characterized in that: The control circuit further comprises a second switch (11) matched with the protruding tooth (33) of the pawl (3), a position identifier (12) matched with the eccentric wheel (7), and a main control board microprocessor connected with the first switch (10), the second switch (11), the position identifier (12) and the micro motor (8).

6. A two-stage interlocking automatic lock device with a pre-lock according to claim 5, characterized in that: Further comprising an electric push rod (13) for driving the opening and closing of the cover, the electric push rod (13) is closed through the closure of the first switch (10).

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