Lock clutch mechanism

Abstract

The utility model relates to the field of locks, in particular to a lock clutch mechanism. The device comprises a base, a sliding block, a clutch sleeve, a cam assembly, a control panel and a connecting piece. The cam assembly comprises a cam, a stroke control piece, a movable pin, an elastic piece and a sealing piece. According to the clutch mechanism, control over the switching process of the working state (the clutch sleeve and the cam can rotate synchronously) and the releasing state (the clutch sleeve and the base are in the relatively fixed state, and the cam can rotate relative to the clutch sleeve) of the clutch mechanism is more convenient, only the sliding block needs to be controlled to move in a reciprocating mode, and in the whole switching process, the sliding block does not need to move. The clutch mechanism can work independently, electrified participation of the motor is basically not needed, the motor only needs to be responsible for independently driving the sliding block to move, rotation of the clutch sleeve and the cam can be achieved through a manual mechanism, and overall power consumption is relatively low. The clutch device is simple and stable in structure, convenient to release the clutch connection state, extremely low in power consumption and particularly suitable for lock products.

Description

Technical Field

[0001] The utility model relates to the field of locks, in particular to a lock clutch mechanism. Background Art

[0002] Electronic locks are limited by the limitations of small battery capacity, requiring the lowest possible power consumption. This requires external forces (operators) to handle power consumption as much as possible, making the use of a clutch mechanism a good option. Currently, there are numerous clutch mechanisms on the market, but they all suffer from complex structures, high power consumption, and difficulty disengaging the clutch when engaged.

[0003] For example, the Chinese patent document with publication number CN106499266A specifically discloses a safe idling electronic lock, including a lock core, a control circuit board, a motor, a clutch cam, a card key cam, a clutch sleeve, a card key pin and a transmission member, wherein the motor and the control circuit board are arranged in the lock core, a keyhole is provided in the lock core, the control circuit board is connected to the motor, a clutch output shaft and a card key output shaft are provided on the motor, the clutch output shaft and the card key output shaft are synchronously rotated, the clutch output shaft of the motor is transmission-connected to the clutch cam, the card key output shaft of the motor is transmission-connected to the card key cam, a clutch groove is provided on the inner wall of the clutch sleeve, the clutch grooves are arranged in pairs, and the same pair of clutch grooves are 180 degrees apart in the circumferential direction of the clutch sleeve, the transmission member is arranged between the clutch groove and the clutch cam, a cam groove is provided in the card key pin, and the card key cam is located in the cam groove. The clutch sleeve serves as the unlocking element. The motor is controlled by a control circuit board. The motor uses a synchronously rotating dual-shaft output type to ensure synchronized rotation of the motor, clutch cam, and key cam. This secure, idle electronic lock operates in two states: Locked: The clutch cam's radial lowest point faces the clutch ball, which is fully retracted into the lock cylinder. Key rotation cannot rotate the clutch sleeve, locking the lock. The key cam's radial lowest point faces the key pin near the keyhole, allowing the key pin to move freely within its cavity. The electronic key can then be freely inserted into and removed from the keyhole. Unlocked: The clutch cam's radial highest point faces the clutch ball, with the ball partially in the lock cylinder and the other in the clutch slot. Key rotation drives the clutch sleeve, unlocking the lock. The key cam's radial highest point faces the key pin near the keyhole, with the key pin partially in the lock cylinder and the other in the electronic key. This position is fixed, preventing the electronic key from being removed from the keyhole.

[0004] The specific principles and usage of the above-mentioned safety idling electronic lock are as follows:

[0005] Initial position: When the electronic key is not inserted into the keyhole, the lock is in locked state.

[0006] Unlocking: When the authorized electronic key is inserted into the keyhole, the electronic key supplies power and communicates to the control circuit board through the electrodes. After the control circuit board verifies the legitimacy of the electronic key, the motor rotates in the forward direction. When the clutch slot and the clutch marble are not aligned, the clutch marble will block the counterclockwise rotation of the clutch cam. Since the power supply to the motor has not stopped, when the electronic key drives the lock core to rotate, at a certain moment the clutch marble will inevitably be aligned with the clutch slot. When the clutch slot and the clutch marble are aligned, since the power supply to the motor has not stopped, the clutch marble is subjected to the rotational thrust of the clutch cam, and the clutch marble partially extends out of the lock core, and the lock is in the open state. At this time, for the purpose of saving, the power supply to the motor can be stopped, and the motor also stops moving due to the combined action of the limit pin and the limit column.

[0007] Locking: When the control circuit board receives the locking command from the key, the motor rotates in the opposite direction, and the motor stops moving due to the combined action of the limit pin and the limit column (the marble disengages from the clutch sleeve and completely retracts into the lock core), and the lock is in a locked state.

[0008] From the introduction of the above specific mechanisms and working principles, it can be seen that the assembly relationship of the necessary components such as the motor, clutch cam, card key cam, clutch sleeve, etc. involved in the safety idling electronic lock is still relatively complex, and during the entire unlocking process, the motor needs to be kept powered, and the power consumption is still relatively high; it is not easy to release the clutch when the clutch mechanism is in the clutch connection state, and the clutch output shaft and the card key output shaft are directly connected to the motor transmission, and the motor cannot work independently. When it is necessary to release the clutch connection relationship to achieve locking, it can only be achieved when the control circuit board receives the locking command from the key and controls the motor to rotate in the opposite direction (when the lock core, clutch sleeve, and marble are under force at the same time, even if the control electronic control board receives the locking command from the key, the motor cannot rotate). Utility Model Content

[0009] The technical problem to be solved by the utility model is to provide a lock clutch mechanism which can make the structure simpler and more reliable, lower the power consumption, and facilitate the release of the clutch connection relationship.

[0010] The technical solution adopted by the utility model to solve its technical problems is: a lock clutch mechanism, including a base, a slider, a clutch sleeve, a cam assembly, a control plate and a connecting piece, the cam assembly includes a cam, the outer peripheral surface of the cam forms a rotational fit with the inner hole of the clutch sleeve, and the cam is equipped with a stroke control member for controlling its rotation stroke, the base has a slide groove and a rotating hole arranged side by side, the axis of the slide groove and the axis of the rotating hole are parallel to each other, the slider is arranged in the slide groove on the base, and the slider is equipped with a slider driving mechanism for driving it to reciprocate along the axis of the slide groove, and the slider driving mechanism is provided. The driving mechanism is electrically connected to the control board; the outer circumference of the clutch sleeve forms a rotational match with the rotating hole on the base, and the rotating hole on the base is provided with a base avoidance hole that matches the connecting piece on the side wall close to the slide groove, and the side wall of the clutch sleeve is provided with a clutch transmission hole that matches the connecting piece, and the outer circumference of the cam is provided with a clutch groove that matches the connecting piece, and the bottom wall position of the clutch groove is provided with a guide hole arranged along the radial direction of the cam, and a movable pin that can move back and forth along its axial direction is installed in the guide hole, and the movable pin is equipped with a structure that limits the displacement of its two ends in the axial direction, and the movable pin is equipped with a There is an elastic member, and the restoring elastic force of the elastic member causes the movable pin to move toward the direction close to the clutch groove; a slider limiting surface and a slider avoidance surface arranged along the axial interval of the slide groove are provided on the side of the slider close to the clutch sleeve; the slider has a first state in which the slider limiting surface is aligned with the clutch transmission hole and a second state in which the slider avoidance surface is aligned with the clutch transmission hole; when the slider is in the first state, the first end of the connecting member is located in the clutch groove and abuts against the movable pin, so that the elastic member is in a compressed state, and the second end of the connecting member is located in the clutch transmission hole. At this time, the clutch sleeve and the cam Able to rotate synchronously; when the slider is in the second state, the reset elastic force of the elastic member causes the movable pin to push the connecting member to move, and the first end of the connecting member can disengage from the clutch groove and move into the clutch transmission hole, and the second end of the connecting member synchronously moves to the avoidance hole of the base. At this time, the clutch sleeve and the base are in a relatively fixed state, and the cam can rotate relative to the clutch sleeve; when the cam rotates to the state where the clutch groove and the clutch transmission hole are aligned, the slider can switch from the second state to the first state; the stroke control member is used to control the cam to rotate until the clutch groove and the clutch transmission hole are aligned.

[0011] A further preferred solution is that the connecting piece is a spherical piece.

[0012] A further preferred solution is that the slider driving mechanism includes a screw and a motor, the screw and the slider form a screw-slider moving pair, and the output shaft of the motor is transmission-connected to the screw to drive the screw to rotate.

[0013] A further preferred solution is that the structure for limiting the axial displacement of the movable pin at both ends includes an annular limiting protrusion and a sealing plate. The annular limiting protrusion is integrally formed and arranged on the inner wall of the guide hole at the end close to the clutch groove. The sealing plate is fixedly arranged on the inner wall of the guide hole at the end away from the clutch groove. The elastic member is a spring arranged between the sealing plate and the movable pin.

[0014] A further preferred solution is that one end of the clutch sleeve is connected to an external transmission member, which can rotate under the driving action of the clutch sleeve. The external transmission member can rotate synchronously or asynchronously with the clutch sleeve (the external transmission member can have an automatic reset function).

[0015] The beneficial effects of the present invention are: the switching process between the clutch mechanism's working state (the clutch sleeve and cam can rotate synchronously) and its released state (the clutch sleeve and base are in a relatively fixed state, and the cam can rotate relative to the clutch sleeve) is more convenient to control, requiring only the reciprocating movement of the slider. During the entire switching process, the clutch mechanism can operate independently, essentially eliminating the need for a powered motor. The motor only needs to independently drive the slider, while the rotation of the clutch sleeve and cam can be achieved manually, resulting in relatively lower overall power consumption. The present invention has a simple and stable structure, convenient release of the clutch connection state, and extremely low power consumption. It can be used in structures with low speeds and small transmission torques, and is particularly suitable for lock products.

[0016] Specifically, when the clutch mechanism is in the first working state (the clutch sleeve, cam, and connecting member are connected and stressed), the slider can freely switch between the first and second states. If it is switched to the second state (the slider retracts to make room for the connecting member to retract), the clutch sleeve is automatically reset when it is subjected to an external force (such as a coil spring or torsion spring), and the clutch sleeve and the base are in a relatively fixed state (the clutch sleeve hole, the connecting member, and the base transmission hole are aligned). When the cam mechanism assembly is rotated again, when the clutch groove and the clutch transmission hole are aligned, the elastic member pushes the movable pin, the connecting member withdraws from the clutch groove, and the cam mechanism and the clutch sleeve move asynchronously, resulting in idling. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall explosion structure of an embodiment of the utility model.

[0018] Figure 2 yes Figure 1 A schematic diagram of the exploded structure of a cam assembly in the illustrated embodiment.

[0019] Figure 3 yes Figure 1 The illustrated embodiment is a schematic cross-sectional structural diagram of the embodiment in an initial state when viewed from above after assembly.

[0020] Figure 4 yes Figure 1 The illustrated embodiment is a schematic cross-sectional structural diagram of the embodiment in an initial state after assembly, viewed from the side.

[0021] Figure 5 yes Figure 3 The structure of the embodiment shown in the clutch rotation process is schematically shown. Figure 1 (The clutch sleeve and the cam can rotate synchronously).

[0022] Figure 6 yes Figure 3 The structure of the embodiment shown in the clutch rotation process is schematically shown. Figure 2 (The clutch sleeve and the cam can rotate synchronously).

[0023] Figure 7 yes Figure 1 The illustrated embodiment is a schematic cross-sectional structural diagram of the embodiment after assembly in an idle running state as viewed from above (the clutch sleeve and the base are in a relatively fixed state, and the cam can rotate relative to the clutch sleeve).

[0024] Figure 8 yes Figure 1 The illustrated embodiment is a schematic cross-sectional structural diagram of the embodiment after assembly in an idle running state as viewed from the side (the clutch sleeve and the base are in a relatively fixed state, and the cam can rotate relative to the clutch sleeve).

[0025] Figure 9 yes Figure 7 The illustrated embodiment is a schematic structural diagram during an idling state.

[0026] The parts in the figure are marked as shown in the following table: base 1, screw 2, slider 3, motor 4, clutch sleeve 6, cam assembly 7, cam 701, stroke control part 702, movable pin 703, elastic part 704, sealing piece 705, control board 8, connecting part 9. DETAILED DESCRIPTION

[0027] The present invention will be further described below with reference to the accompanying drawings.

[0028] like Figures 1 to 9As shown, the utility model includes a base 1, a slider 3, a clutch sleeve 6, a cam assembly 7, a control board 8 and a connecting piece 9. The cam assembly 7 includes a cam 701. The outer circumferential surface of the cam 701 forms a rotational fit with the inner hole of the clutch sleeve 6, and the cam 701 is equipped with a stroke control piece 702 for controlling its rotational stroke. The base 1 has a slide groove and a rotating hole arranged side by side. The axis of the slide groove and the axis of the rotating hole are parallel to each other. The slider 3 is arranged in the slide groove on the base 1. The slider 3 is equipped with a slider driving mechanism for driving it to reciprocate along the axis direction of the slide groove. The slider driving mechanism is electrically connected to the control board 8; the outer circumferential surface of the clutch sleeve 6 forms a rotational fit with the rotating hole on the base 1. The rotating hole on the base 1 is provided with a base avoidance hole that cooperates with the connecting piece 9 on the side wall close to the slide groove. The side wall of the clutch sleeve 6 is provided with a clutch transmission hole that cooperates with the connecting piece 9, the outer peripheral surface of the cam 701 is provided with a clutch groove that cooperates with the connecting piece 9, and the bottom wall of the clutch groove is provided with a guide hole arranged along the radial direction of the cam 701. A movable pin 703 that can move back and forth along its axial direction is installed in the guide hole. The movable pin 703 is equipped with a structure that limits the displacement of its two axial ends. The movable pin 703 is equipped with an elastic member 704. The reset elastic force of the elastic member 704 causes the movable pin 703 to move toward the direction close to the clutch groove.

[0029] A slider limiting surface and a slider avoidance surface are arranged at intervals along the axial direction of the slide groove on the side of the slider 3 close to the clutch sleeve 6; the slider 3 has a first state in which the slider limiting surface is aligned with the clutch transmission hole and a second state in which the slider avoidance surface is aligned with the clutch transmission hole (that is, it is equivalent to the outer peripheral surface of the clutch sleeve 6 being in a state in which the clutch transmission hole and the base avoidance hole are aligned in advance, and the slider 3 can freely switch between the first state and the second state by reciprocating movement).

[0030] When the slider 3 is in the first state, the first end of the connecting member 9 is located in the clutch groove and abuts against the movable pin 703, so that the elastic member 704 is in a compressed state and the second end of the connecting member 9 is located in the clutch transmission hole. At this time, the clutch sleeve 6 and the cam 701 can rotate synchronously; when the slider 3 is in the second state, the restoring elastic force of the elastic member 704 causes the movable pin 703 to push the connecting member 9 to move, and the first end of the connecting member 9 can be disengaged from the clutch groove and move into the clutch transmission hole, and the second end of the connecting member 9 is synchronously moved into the base avoidance hole. At this time, the clutch sleeve 6 and the base 1 are in a relatively fixed state, and the cam 701 can rotate relative to the clutch sleeve 6 (that is, when the elastic member 704 is in the natural state, the end face of the movable pin 703 still has a certain distance from the inner hole of the clutch sleeve 6, and does not interfere with the movable pin 703 and The cam 701 and other components rotate synchronously as a whole); when the cam 701 rotates to the state where the clutch groove and the clutch transmission hole are aligned, the slider 3 can switch from the second state to the first state (that is, the side end surface of the slider 3 can squeeze the connecting member 9 during this process, causing the connecting member 9 to gradually disengage from the base avoidance hole until the first state of the slider 3 described above is formed); the stroke control member 702 is used to control the cam 701 to rotate to align the clutch groove and the clutch transmission hole. In specific implementation, the slider 3 can only be switched from the second state to the first state after the stroke control member 702 ensures that the cam 701 rotates to the clutch groove and the clutch transmission hole are aligned. Otherwise, the end of the connecting member 9 close to the cam 701 does not have a moving space (the moving space is the area where the clutch groove is located), and the slider 3 cannot move accordingly. The stroke control member 702 can be understood in a broad sense. For specific implementations, please refer to existing conventional technologies. It can usually be the cooperation of a limit lever and a groove, a paired magnetic suction component, a photoelectric sensor, a torsion spring, etc.

[0031] It is understandable that the slider 3 of the present invention can move back and forth along the slide groove, and the specific cross-sectional shape is not limited. The base avoidance hole is usually arranged in an integrated structure with the slide groove. The second end of the connector 9 needs to move back and forth in the area where the base avoidance hole is located. The slider limit surface and the side end of the slider 3 where the slider avoidance surface are located also need to move back and forth in the area where the base avoidance hole is located. There can be many types of slider drive mechanisms, which can be various conventional linear displacement actuators (the displacement method is not limited). In order to make the structure simple and reliable, in a preferred embodiment of the present invention, the slider drive mechanism includes a screw 2 and a motor 4. The screw 2 and the slider 3 form a screw slider moving pair. The output shaft of the motor 4 is connected to the screw 2 to drive the screw 2 to rotate. It is understandable that the screw slider moving pair is an existing conventional technology. The screw is threadedly connected to the slider. The rotation of the screw can drive the slider to move back and forth along the slide groove.

[0032] To ensure a simple and reliable structure, the connecting member 9 is preferably spherical. In certain alternative embodiments, the connecting member 9 may also be a staple structure, with the circumferential edges at both ends of the staple having an annular chamfered or rounded structure, or the end faces of the staple having an outwardly convex hemispherical structure. There are various ways to install the movable pin 703. To ensure a simple and reliable structure, the structure provided to the movable pin 703 to limit its axial displacement at both ends includes an annular limiting protrusion and a sealing plate 705. The annular limiting protrusion is integrally formed and disposed on the inner wall of the guide hole at the end near the clutch groove. The sealing plate 705 is fixedly disposed on the inner wall of the guide hole at the end away from the clutch groove. The elastic member 704 is a spring disposed between the sealing plate 705 and the movable pin 703. The end face of the movable pin 703 may also be preferably designed with a spring mounting groove that matches the spring. In certain alternative embodiments, the annular limiting protrusion and the sealing plate 705 may also be interchanged. In certain alternative embodiments, the annular limiting protrusion may also be replaced by a localized protrusion. In some alternative embodiments, the spring may be replaced by other elastic elements.

[0033] To facilitate connection with other external moving parts, one end of the clutch sleeve 6 is connected to an external transmission member 5, which can rotate synchronously (or asynchronously) with the clutch sleeve 6 (the two can be fixedly connected, key-connected, or connected through an additional transmission mechanism).

[0034] When the present invention is applied to a lock, it is only necessary to fix the base 1 in the lock (in some embodiments, the base 1 of the present invention can also be integrated with the fixed parts of the lock into a whole). When it is in the clutch rotation state (the clutch sleeve 6 and the cam 701 can rotate synchronously, that is, the lock is opened. This part is conventional technology and is not within the scope of protection required by the present invention and will not be described again), the external transmission member 5 can be indirectly driven by the cam 701 through external force. The external transmission member 5 corresponds to the unlocking member of the lock product; when it is in the idle running state (the clutch sleeve 6 and the base 1 are in a relatively fixed state, and the cam 701 can rotate relative to the clutch sleeve 6), when the external force drives the cam 701, the external transmission member 5 will not follow the linkage (the lock will not be opened).

Claims

1. A lock clutch mechanism, comprising a clutch sleeve (6), a cam assembly (7), a control plate (8) and a connecting member (9), wherein the cam assembly (7) comprises a cam (701), the outer peripheral surface of the cam (701) being rotationally engaged with the inner hole of the clutch sleeve (6), and the cam (701) being provided with a stroke control member (702) for controlling its rotation stroke, characterized in that: The invention comprises a base (1) and a slider (3), wherein the base (1) has a slide groove and a rotating hole arranged side by side, the axis of the slide groove and the axis of the rotating hole are parallel to each other, the slider (3) is arranged in the slide groove on the base (1), the slider (3) is equipped with a slider driving mechanism for driving it to move back and forth along the axis of the slide groove, and the slider driving mechanism is electrically connected to the control board (8); the outer peripheral surface of the clutch sleeve (6) forms a rotational match with the rotating hole on the base (1), and the rotating hole on the base (1) is provided with a base avoidance hole matched with the connecting member (9) on the side wall close to the slide groove, and the clutch sleeve The side wall of (6) is provided with a clutch transmission hole that matches the connecting member (9), the outer peripheral surface of the cam (701) is provided with a clutch groove that matches the connecting member (9), the bottom wall of the clutch groove is provided with a guide hole arranged along the radial direction of the cam (701), and a movable pin (703) that can reciprocate along its axial direction is installed in the guide hole, and the movable pin (703) is provided with a structure that limits the displacement of its two axial ends. The movable pin (703) is provided with an elastic member (704), and the restoring elastic force of the elastic member (704) causes the movable pin (703) to move toward the direction close to the clutch groove; A slider limiting surface and a slider avoiding surface are provided on one side of the slider (3) close to the clutch sleeve (6), which are spaced apart along the axial direction of the slide groove; the slider (3) has a first state in which the slider limiting surface is aligned with the clutch transmission hole, and a second state in which the slider avoiding surface is aligned with the clutch transmission hole; When the slider (3) is in the first state, the first end of the connecting member (9) is located in the clutch groove and abuts against the movable pin (703), so that the elastic member (704) is in a compressed state, and the second end of the connecting member (9) is located in the clutch transmission hole. At this time, the clutch sleeve (6) and the cam (701) can rotate synchronously; When the slider (3) is in the second state, the resetting elastic force of the elastic member (704) causes the movable pin (703) to push the connecting member (9) to move, and the first end of the connecting member (9) can be disengaged from the clutch groove and move into the clutch transmission hole, and the second end of the connecting member (9) is synchronously moved into the base avoidance hole. At this time, the clutch sleeve (6) and the base (1) are in a relatively fixed state, and the cam (701) can rotate relative to the clutch sleeve (6); When the cam (701) rotates to a state where the clutch groove and the clutch transmission hole are aligned, the slider (3) can switch from the second state to the first state; the stroke control member (702) is used to control the cam (701) to rotate to a state where the clutch groove and the clutch transmission hole are aligned.

2. The lock clutch mechanism according to claim 1, wherein: The connecting piece (9) is a spherical piece.

3. The lock clutch mechanism according to claim 1, wherein: The slider driving mechanism comprises a screw rod (2) and a motor (4); the screw rod (2) and the slider (3) form a screw-slider moving pair; the output shaft of the motor (4) is in transmission connection with the screw rod (2) to drive the screw rod (2) to rotate.

4. The lock clutch mechanism according to claim 1, wherein: The structure provided on the movable pin (703) for limiting the axial displacement at both ends thereof includes an annular limiting protrusion and a sealing piece (705). The annular limiting protrusion is integrally formed and arranged on the inner wall of the guide hole at the end close to the clutch groove. The sealing piece (705) is fixedly arranged on the inner wall of the guide hole at the end away from the clutch groove. The elastic member (704) is a spring arranged between the sealing piece (705) and the movable pin (703).

5. The lock clutch mechanism according to any one of claims 1 to 4, characterized in that: One end of the clutch sleeve (6) is connected to an external transmission member (5), and the external transmission member (5) can rotate under the driving action of the clutch sleeve (6).

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