Pressing locking device, control system and method

Abstract

The invention discloses a compression locking device, a control system and a method in the field of rail transit. The device comprises a lock body; a power unit; the transmission mechanism comprises a speed reduction device, a spring bolt and an energy storage element; the braking device is a spring friction braking device; the spring friction braking device comprises a control unit and an execution unit, the control unit is fixed to the lock body, and the execution unit is installed at the end of the non-longest shaft of the transmission mechanism. The spring friction braking device can control the rotating state and the braking state of the transmission mechanism. The transmission mechanism transmits the driving force of the power unit to unlock or lock the spring bolt; the overall size of the device is reduced, and the weight is reduced; wherein the spring friction braking devices are matched with respective spring connection, the stability of the braking performance is further improved, and the spring friction braking devices have no running-in period and have better adaptive capacity.

Description

Technical Field

[0001] The present application relates to the field of rail transit technology, and in particular to a compression locking device, a control system and a method. Background Art

[0002] Auxiliary locks are important devices used in rail transit door systems at home and abroad to enhance the constraints of door leaves and compensate for the compression of sealing strips, thereby solving the airtightness problem of vehicles and improving the safety performance of door systems. They are indispensable in high-speed train door systems. At present, almost all high-speed train plug door systems use pneumatic auxiliary lock devices, which use cylinders as power sources to drive the lock tongue to swing and compress the door leaf strips to achieve locking and unlocking functions.

[0003] On the one hand, the pneumatic auxiliary lock devices commonly used in the field of high-speed EMUs are driven by the air source of the vehicle body. Their performance is greatly affected by the working state of the air source, so high requirements are placed on the air source of the vehicle body. On the other hand, the rapidly developing urban and intercity EMUs generally do not have air source matching, but there are still considerable requirements for their airtightness and safety performance, and auxiliary lock devices need to be installed. The electric auxiliary lock is a key technology that gets rid of the dependence on additional air sources for the vehicle body, solves the airtightness, passenger comfort and reliable compression of urban and intercity vehicles, and realizes the wide adaptation of auxiliary locks for high-speed EMUs and urban and intercity EMUs.

[0004] After reaching the locked position, the auxiliary lock needs to remain locked until the unlocking function is executed. Existing electric auxiliary locks often use end face friction electromagnetic brake devices at the motor shaft end to achieve the locking and holding function of the electric auxiliary lock. For example, CN110644867A uses an electromagnetic brake placed at the top of the motor shaft, and CN209976248U uses a friction brake placed at the tail of the motor shaft. The device is activated after the auxiliary lock reaches the locked position, and the brake disc is electromagnetically attracted to form friction to brake the entire transmission mechanism, thereby achieving the locking and holding function of the electric auxiliary lock. The end face friction electromagnetic brake device further increases the length of the motor shaft, thereby increasing the size of the lock body and wasting space; secondly, the end face friction electromagnetic brake device is affected by the process such as surface roughness and size and the installation accuracy, and there is an initial gap and unevenness between the two friction discs. Therefore, in actual use, the friction device only generates friction for local extrusion in the early stage, and the braking performance is low at this time. After the running-in period, the local wear and tear, the braking performance gradually increases to the expected. Once replaced or loose, it needs to be re-run-in. The braking performance of the end face friction electromagnetic brake device is unstable. Summary of the invention

[0005] The purpose of the present application is to provide a clamping locking device, a control system and a method to solve the defects of the prior art, such as the increase in lock body size and weight, the waste of space, and the unstable braking ability and poor adaptability of the end face friction brake during use.

[0006] In order to achieve the above objectives, this application is implemented by adopting the following technical solutions: In a first aspect, a compression locking device comprises: Lock body; A power unit, wherein the power unit is fixed on the lock body; The transmission mechanism comprises a reduction gear, a lock tongue, and an energy storage element; each transmission shaft of the reduction gear is transmission-connected to the lock body, and the transmission mechanism is driven by a power unit to transmit the driving force of the power unit to the lock tongue to activate it to achieve locking; the energy storage element is connected to the lock body and the reduction gear to store energy during the locking process, and when the compression locking device loses power or is unlocked, the energy storage element releases energy to drive the reduction gear to achieve reset.

[0007] The braking device is a spring friction braking device; the spring friction braking device comprises a control unit and an execution unit, the control unit is fixed on the lock body, and the execution unit is installed at the end of the non-longest axis of the transmission mechanism; the spring friction braking device controls the rotation state and braking state of the transmission mechanism by switching the state of the execution unit.

[0008] According to a further solution of the present application, the spring friction braking device includes an electromagnet fixed on the lock body, a spring stopper and a hub fixed on the transmission mechanism, an electromagnet reset spring is coaxially mounted on the moving iron core of the electromagnet, a hub spring is mounted on the outer ring of the hub, one end arm of the hub spring is connected to the spring stopper, and the other end arm is connected to the moving iron core of the electromagnet.

[0009] In a further solution of the present application, the reduction device in the transmission mechanism includes a primary gear transmission pair, a secondary gear transmission pair and a cam mechanism, the primary gear transmission pair is rotationally connected to the secondary gear transmission pair, the secondary gear transmission pair is coaxially connected to the cam mechanism, and the cam mechanism is in constant contact with the lock tongue; The power unit drives the primary gear transmission pair to rotate, the primary gear transmission pair drives the secondary gear transmission pair to rotate, and the secondary gear transmission pair drives the cam assembly to rotate, so that the lock tongue is driven to rotate.

[0010] In a further solution, the first-stage gear transmission pair includes a small gear fixed at the output end of the power unit, the second-stage gear transmission pair includes a large gear that rotates synchronously with the cam mechanism, and an idler double gear is rotatably mounted on the lock body, the small gear is meshed with the large gear in the idler double gear, and the large gear is meshed with the small gear in the idler double gear.

[0011] In a further solution, the cam mechanism comprises a cam, the cam is rotatably mounted on the lock body via a cam shaft, and guide cylinders are provided at both ends of the cam disc body.

[0012] A further solution is that the cam rotation includes an unloaded approach section, a variable speed drive section and a locking load-bearing section, wherein the preferred range of the cam rotation angle of the unloaded approach section is 55~65°, which is used to drive the lock tongue to swing quickly to begin to tighten the corresponding lock buckle; the preferred range of the cam rotation angle of the variable speed drive section is 260~275°, during which the pressure angle of the cam gradually decreases from 35° to 25° as the stroke increases; the preferred range of the locking load-bearing section angle is 25~32°, during which the cam is designed as a nearly concentric circle.

[0013] According to a further solution of the present application, the lock tongue is rotatably mounted on the lock body via a lock tongue shaft, and guide cylinders are provided at both ends of the lock tongue.

[0014] According to a further solution of the present application, the energy storage element includes an unlocking spring and a lock tongue reset spring; there are two unlocking springs, which are respectively installed on the guide cylinders at both ends of the cam, and the two unlocking springs are correspondingly connected to the cam and the lock body; the unlocking spring realizes the reset of the cam mechanism; the lock tongue reset spring is installed on the guide cylinder of the lock tongue, and the two ends of the lock tongue reset spring are correspondingly connected to the lock tongue and the lock body; the lock tongue reset spring realizes the reset of the lock tongue.

[0015] In a second aspect, the present application provides a control system, which includes the above-mentioned clamping and locking device and a controller, wherein the controller is used to issue control instructions to the power unit and the spring friction brake device.

[0016] In a third aspect, the present application provides a control method based on the above control system, which includes: The controller issues a locking command, the power unit drives the deceleration device, the deceleration device drives the lock tongue to rotate to the locking position, the moving iron core of the control unit electromagnet in the spring friction brake device contracts, drives the wheel hub spring friction brake the wheel hub, and realizes braking of the transmission mechanism; The controller issues an unlocking command, the power unit is short-circuited to achieve initial buffering, the spring friction brake device loses power and resets, and the braking on the transmission mechanism is relieved; the energy storage element releases energy and reversely drives the transmission mechanism to achieve the reset and unlocking of the lock tongue; or the power unit is energized, and the power unit reversely drives the transmission mechanism to achieve the reset and unlocking of the lock tongue.

[0017] When the control system loses power, the spring friction brake device loses power and resets, thereby relieving the braking of the transmission mechanism; the energy storage element releases energy and reversely drives the transmission mechanism to achieve the resetting and unlocking of the lock tongue.

[0018] The beneficial effects of this application are: In the present application, a spring friction brake device is used to act on the transmission mechanism, and the nearly concentric circle design at the end of the cam profile is used to reduce the braking demand. The brake function actuator is arranged at the end of the transmission mechanism. This solution effectively reduces the overall height dimension of the motor shaft system and improves the efficiency of space utilization. In actual production, the overall volume dimension of the auxiliary lock device is reduced by 25%, among which the overall height dimension of the auxiliary lock device is reduced by 13%, the overall length dimension is reduced by 14%, and the overall weight of the auxiliary lock device is reduced by 35%, while cost reduction is achieved.

[0019] The design of the wheel hub and the electromagnet moving iron core in the spring friction brake device, in conjunction with their respective spring connections, enables the wheel hub spring to hold the wheel hub tightly to generate friction braking force during braking. The wheel hub spring has a self-centering function when it is tightly held, and has good adaptability to the initial gap and unevenness caused by processes such as surface roughness and size, as well as installation deviations. The spring friction brake device has no running-in period, and the stability of the braking performance is further improved, which has better adaptability to actual working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure explosion of the compression locking device in the first embodiment of the present application; Figure 2 This is a schematic diagram of the structure of the compression and locking device in the first embodiment of the present application; Figure 3 A top view of the compression locking device in the first embodiment of the present application (with the gear cover removed) Figure 4 An enlarged view of the spring friction brake device in the locking device of the first embodiment of the present application; Figure 5 This is a schematic diagram of preferred parameters of the cam in the compression locking device of Example 1 of the present application.

[0021] in: 1. Lock body; 2. Camshaft; 3. Motor; 4. Cam; 5. Pinion; 6. Idler shaft; 7. Idler double gear; 8. Gear cover; 9. Large gear; 10. Stop shaft; 11. Bearing; 12. Unlocking spring; 13. Lock tongue; 14. Lock tongue return spring; 15. Lock tongue shaft; 16. Wheel hub; 17. Spring stopper; 18. Wheel hub spring; 19. Electromagnet return spring; 20. Electromagnet. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present application and its application or use. Embodiment 1

[0023] like Figure 1 and Figure 2 As shown, this embodiment discloses a compression locking device, which includes a lock body 1, a lock tongue 13, and a spring friction brake device; wherein two parallel partitions are installed at intervals on the lock body 1, and the lock tongue 13 is rotatably installed on the lock body 1 and intermittently constrained by a primary constraint force; a power unit is fixed to the lock body 1, and the power unit is connected to the lock tongue 13 through a reduction device, and the reduction device is intermittently constrained by a secondary constraint force; usually the power unit, the reduction device and the lock tongue 13 are fixed on two partitions in parallel and at intervals, wherein the position of the reduction device is between the power unit and the lock tongue 13; the spring friction brake device is fixed on the lock body 1, and the spring friction brake device is movably connected to the reduction device to realize the constraint of an additional adaptive and variable three-level constraint force on the reduction device; the reduction device transmits the driving force of the power unit to unlock or lock the lock tongue 13, or when the power unit loses power, the lock tongue 13 is unlocked by the release of the primary constraint force, the secondary constraint force and the tertiary constraint force.

[0024] When in use, the power unit drives the deceleration device to work and then drives the lock tongue 13 to move, thereby realizing the locking or unlocking action. In this embodiment, the motor 3 is used as the power unit, and other components, such as a rotary cylinder, etc., can be selected according to actual conditions. When the lock tongue 13 is locked, the lock tongue 13 is fixedly constrained under the action of the spring friction brake device. The three-level restraint force generated by the electromagnetic brake device can be adjusted accordingly with the movement state of the lock tongue 13, and has strong adaptability.

[0025] The structure of the device is described in detail below in conjunction with the accompanying drawings and the operating principle.

[0026] As attached Figure 1 and Figure 3 As shown, the deceleration device in this embodiment includes three parts, one is a primary gear transmission pair, the second is a secondary gear transmission pair, and the third is a cam assembly. The primary gear transmission pair is connected to the output shaft of the motor 3, and the secondary gear transmission pair and the cam assembly are both rotatably mounted on the partition of the lock body 1. The motor 3 drives the primary gear transmission pair to rotate, and then drives the secondary gear transmission pair to rotate, and finally drives the cam assembly to drive the lock tongue 13 to rotate. During the process, the primary constraint force constraint and the secondary constraint force constraint gradually change; The primary gear transmission pair includes a small gear 5, and the secondary gear transmission pair includes a large gear 9. The small gear 5 is coaxially fixed on the output shaft of the motor 3, and the large gear 9 is coaxially fixed on the camshaft 2. The camshaft 2 is rotatably installed in the installation area between the partitions of the lock body 1. In this embodiment, the secondary gear transmission pair and the primary gear transmission pair share an idler double gear 7, which is rotatably installed on the partition of the lock body 1 through an idler shaft 6. The idler double gear 7 consists of large and small gears installed axially as one. During installation, the large gear and the small gear 5 in the idler double gear 7 are meshed to form a primary gear transmission pair; the small gear in the idler double gear 7 is meshed with the large gear 9 to form a II-level gear transmission pair; the motor 3 drives the rotation of each gear, indirectly drives the camshaft 2 to rotate, and finally realizes the rotation of the cam assembly to act on the lock tongue 13.

[0027] The cam assembly in this embodiment is a component that is in direct contact with the lock tongue 13, and needs to ensure strong stability. It is designed as follows: the cam assembly includes a cam 4 and two unlocking springs 12. The cam 4 is fixed to the area of ​​the camshaft 2 between the two partitions. Guide cylinders are integrally arranged at both ends of the cam 4 in the axial direction. The two unlocking springs 12 are axially correspondingly installed on the guide cylinders. One end arm of each unlocking spring 12 is hooked on the pin shaft of the cam 4, and the other end arm is connected to the lock body 1. The deformation of the unlocking spring 12 is used to provide a secondary restraining force; the lock tongue 13 in this embodiment is rotatably installed on the lock body 1 through the lock tongue shaft 15, and guide cylinders are also arranged at both axial ends of the lock tongue 13, and a lock tongue reset spring 14 is axially arranged on the guide cylinder on one side, and one end arm of the lock tongue reset spring 14 is hooked on the lock tongue 13, and the other end arm is connected to the lock body 1. The deformation of the lock tongue reset spring 14 provides a primary restraining force. It should be noted here that the lock tongue 13 and the cam 4 need to be in contact and connected.

[0028] As attached Figures 2 to 4 As shown, the spring friction brake device in this embodiment includes an electromagnet 20, a spring stopper 17 and a wheel hub 16, wherein the electromagnet 20 and the spring stopper 17 are fixed at intervals on a partition on the side of the lock body 1 away from the large gear 9, the wheel hub 16 is coaxially fixed to one end of the camshaft 2 close to the electromagnet 20, an electromagnet reset spring 19 is coaxially installed on the moving iron core of the electromagnet 20, and a wheel hub spring 18 is arranged on the outer ring of the wheel hub 16. The wheel hub spring 18 has a certain installation torque, one end arm is blocked by the spring stopper 17, and the other end arm is connected to the pin shaft on the moving iron core inside the electromagnet 20 and can move with the moving iron core inside the electromagnet 20.

[0029] In some other embodiments, a stop shaft 10 and a gear cover 8 are provided. The stop shaft 10 is fixedly mounted on the lock body 1, and the end thereof and the structure on the large gear 9 constitute a stop feature; the gear cover 8 is fixedly mounted on the lock body 1; when in use, the entire device is installed at the corresponding position of the door system by screws.

[0030] As attached Figure 5 As shown, in this embodiment, when the cam is working, the side wall contour line is the working contour line of the cam, and the working contour line includes a no-load approach section, a variable speed drive section and a locking bearing section. The preferred range of the total rotation angle of the cam during a single action along the working contour line is 310~330°, wherein the preferred range of the rotation angle of the cam in the no-load approach section is 55~65°, and this section is used to drive the lock tongue 13 to swing quickly to begin to tighten the corresponding lock buckle; the preferred range of the rotation angle of the cam in the variable speed drive section is 260~275°, and the pressure angle of the cam in this section gradually decreases from 35° to 25° as the stroke increases, the force transmission performance of the cam gradually improves, and the output torque continues to increase; the preferred range of the angle of the locking bearing section is 25~32°, and the cam is designed as a nearly concentric circle.

[0031] The technical parameters of the compression and locking device in this embodiment and the existing compression and locking device are compared as shown in Table 1.

[0032] Table 1 It can be seen from Table 1 that, compared with the existing compression and locking device, the device in this embodiment is superior to the existing compression and locking device in many technical parameters, and ultimately reduces costs.

[0033] Technical point 1 of the present application is that when the spring friction brake device is braking, the electromagnetic element drives the spring to hold the wheel hub 16 to form a friction brake. The cam 4 profile is designed as a nearly concentric circle at the end of the stroke, which effectively reduces the demand for braking capacity when the auxiliary lock is in the locked state, and provides a prerequisite for the arrangement of the intermediate shaft of the spring friction brake device. The arrangement of the brake device on the camshaft 2 effectively reduces the total height of the motor shaft system, thereby realizing the design of reducing the overall size, weight and cost of the auxiliary lock device.

[0034] The second technical point in this application is that the braking capacity of the end face friction electromagnetic brake device is unstable. In the spring friction brake device, the tightening direction of the inner diameter of the hub spring 18 is the same as the movement trend of the hub 16; after the hub spring 18 is tightened, if the braked hub 16 has additional abnormal movement trends, the movement trend of the hub 16 will drive the inner diameter of the hub spring 18 to further shrink, and the hub spring 18 will be wound tighter and tighter, and the braking capacity will increase rapidly. In addition, the hub spring has a self-centering function when tightened, and has good adaptability to the initial gap and unevenness caused by the process and installation deviations such as surface roughness and size. The spring friction brake device has no running-in period, and the stability of the braking performance is further improved, which has better adaptability to actual working conditions.

[0035] Working principle of the device: The pressing and locking device (auxiliary lock) in this embodiment is powered by the motor 3, which transmits the power to the camshaft 2 through the I-level and II-level gear pairs, driving the cam 4 coaxially mounted on the camshaft 2 to rotate. The cam 4 and the lock tongue 13 form a cam pair to drive the lock tongue 13 to rotate and press the corresponding lock buckle structure on the door leaf to achieve the locking function. After reaching the locked position, the electromagnet 20 drives the hub spring 18 to contract and hold the hub 16 to form a friction brake, realizing the pressing and locking function of the electric pressing and locking device on the door. When unlocking, the electromagnet 20 and the hub spring 18 reset and release the hub 16, release the brake, and the entire mechanism reverses under the action of the unlocking spring 12 and the lock tongue reset spring 14. It has the safety function of automatic unlocking when the power is off. When the power is off, the electromagnet 20 can automatically reset under the action of the electromagnet reset spring 19, release the brake, and the entire mechanism reverses under the action of the unlocking spring 12 and the lock tongue reset spring 14.

[0036] In addition, when the auxiliary lock is in the locked state, the external load is transmitted to the cam pair formed by the cam 4 and the lock tongue 13, and a positive pressure is formed at the contact position between the cam 4 and the lock tongue 13. Since the cam has an eccentricity around its rotation center, the external load has a torque on the camshaft 2, which is the main torque required for braking. When designing the profile of the cam 4, the end of the stroke (reached when in the locked state) is designed to be a nearly concentric circle, so the required braking torque around the camshaft 2 generated by the positive pressure at the cam pair is effectively reduced, thereby greatly reducing the demand for the braking capacity of the brake actuator, providing a prerequisite for the arrangement of the intermediate shaft of the spring friction brake device; wherein the spring friction brake device drives the hub spring 18 to hold the hub 16 tightly through the electromagnetic element during braking, forming friction braking. In the spring friction brake device, the tightening direction of the inner diameter of the hub spring 18 is the same as the movement trend of the hub 16; after the hub spring 18 is tightened, if the braked hub 16 has an additional abnormal movement trend, the hub movement trend will drive the inner diameter of the spring to further shrink, the hub spring 18 will be wound tighter and tighter, and the braking capacity will increase rapidly. Embodiment 2

[0037] This embodiment provides a control system, which includes the clamping and locking device in the above-mentioned embodiment 1 and a controller, the controller is electrically connected to the power unit and the spring friction brake device, and the controller is used to issue control instructions to the power unit and the spring friction brake device. Embodiment 3

[0038] This embodiment discloses a control method, which is implemented based on the control system of the above-mentioned embodiment 2 and includes the following steps: Electric locking process: At the beginning of the locking process, the mechanism is in the unlocked state, at which time the camshaft 2 and the coaxially mounted large gear 9 and the lock tongue 13 are in Figure 3The dotted line (dotted line outline) position is shown. When the clamping locking device receives the locking command from the controller (control system), the electronic control system controls the motor 3 to rotate in the clamping direction and output the driving force, and the first and second gear pairs transmit the power to the camshaft 2. The camshaft 2 and the coaxially mounted large gear 9 gradually move to the solid line (solid line outline) position under the drive of the motor 3. At the same time, the camshaft 2 drives the coaxially mounted cam 4 to drive the lock tongue 13 to gradually move to the solid line (solid line outline) position. During the movement, the built-in position sensor of the motor 3 continuously detects the angle of the motor movement. When the set angle is reached, the electronic control system determines that the electric compression locking device has moved to the locked position, and then the electronic control system controls the electromagnet 20 installed on the lock body 1 to start the action. The moving iron core inside the electromagnet 20 contracts, pulling the arm of the hub spring 18 to move, and the other arm of the hub spring 18 is blocked by the spring block 17 fixed on the lock body 1 and remains stationary. Therefore, the inner diameter of the hub spring 18 contracts and holds the hub 16 tightly, and forms a friction braking force around the hub 16, thereby realizing the dynamic compression locking device's compression and locking function on the door. After the brake is formed, the motor 3 enters a short delay. During the delay period, the built-in position sensor of the motor 3 continuously detects the angle of the motor movement. If no movement is detected, the motor 3 is powered off. The electromagnet 20 is continuously powered from the start of the action and keeps the electric lock in a locked state.

[0039] Electric unlocking process: When the electric compression locking device receives the unlocking command from the control system, the built-in position sensor of the motor 3 starts to work and continuously detects the angle of the motor movement. At the same time, the internal winding of the motor 3 is short-circuited. At this time, the motor 3 changes from the motor function to the generator function, and the transmission resistance of the overall mechanism of the electric lock device increases to cope with the rubber strip rebound force of the door system on the electric lock device during unlocking. Then the electric control system controls the electromagnet 20 to cut off the power, and the moving iron core is reset under the action of the electromagnet reset spring 19, driving the arm of one end of the hub spring 18 to return to motion, the inner diameter of the hub spring 18 increases to release the hub 16, and the camshaft 2 and the entire mechanism are released from the brake, and the entire mechanism is reversed under the action of the unlocking spring 12, the lock tongue reset spring 14 and the rubber strip rebound force. During this reverse movement, the built-in position sensor of the motor 3 continuously detects the angle of the motor movement. After reaching the set angle, the electric control system determines that the impact of the rubber strip rebound force has been alleviated, and then the electric control system controls the internal short-circuited winding of the motor 3 to disconnect, and the motor 3 resumes the motor function and starts to rotate in the unlocking direction and outputs the driving force to achieve unlocking.

[0040] Power failure unlocking process: When the system loses power or partially loses power, the power supplied to the electric compression locking device is disconnected. After the electromagnet 20 loses power, the moving iron core is reset under the action of the electromagnet reset spring 19, driving the arm of the hub spring 18 to return to motion. The inner diameter of the hub spring 18 increases to form a gap with the hub 16 to release the hub 16, and the camshaft 2 and the entire mechanism are released from braking. The camshaft 2 and the coaxially mounted cam 4 and large gear 9 reverse under the action of the unlocking spring 12, and the lock tongue 13 is reset by the lock tongue reset spring 14.

[0041] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", etc. are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, "multiple" means two or more.

[0042] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood by specific circumstances.

Claims

1. A compression locking device, characterized in that: include: Lock body (1); A power unit, the power unit being fixed on the lock body (1); A transmission mechanism, the transmission mechanism comprising a reduction gear, a lock tongue (13), and an energy storage element; each transmission shaft of the reduction gear is in transmission connection with the lock body (1), the transmission mechanism is driven by a power unit, and transmits the driving force of the power unit to the lock tongue (13), causing it to move to achieve locking; the energy storage element is connected to the lock body and the reduction gear, and stores energy during the locking process, and when the pressing locking device loses power or is unlocked, the energy storage element releases energy to drive the reduction gear to achieve reset; A braking device, the braking device being a spring friction braking device; the spring friction braking device comprising a control unit and an execution unit, the control unit being fixed on the lock body (1), and the execution unit being installed at the end of the non-longest axis of the transmission mechanism; the spring friction braking device controls the rotation state and the braking state of the transmission mechanism by switching the state of the execution unit.

2. The compression locking device according to claim 1, characterized in that: The spring friction brake device comprises an electromagnet (20) fixed on the lock body (1), a spring stopper (17) and a wheel hub (16) fixed on the transmission mechanism, an electromagnet reset spring (19) is coaxially mounted on the moving iron core of the electromagnet (20), a wheel hub spring (18) is mounted on the outer ring of the wheel hub (16), one end arm of the wheel hub spring (18) is connected to the spring stopper (17), and the other end arm is connected to the moving iron core of the electromagnet (20).

3. The compression locking device according to claim 1, characterized in that: The reduction device comprises a primary gear transmission pair, a secondary gear transmission pair and a cam mechanism, the primary gear transmission pair is rotationally connected to the secondary gear transmission pair, the secondary gear transmission pair is coaxially connected to the cam mechanism, and the cam mechanism is in constant contact with the lock tongue (13); The power unit drives the primary gear transmission pair to rotate, the primary gear transmission pair drives the secondary gear transmission pair to rotate, and the secondary gear transmission pair drives the cam assembly to rotate, thereby achieving driven rotation of the lock tongue (13).

4. The compression locking device according to claim 3, characterized in that: The first-stage gear transmission pair comprises a small gear (5) fixed at the output end of the power unit, the second-stage gear transmission pair comprises a large gear (9) rotating synchronously with the cam mechanism, an idler double gear (7) is rotatably mounted on the lock body (1), the small gear (5) meshes with the large gear in the idler double gear (7), and the large gear (9) meshes with the small gear in the idler double gear (7).

5. The compression locking device according to claim 3, characterized in that: The cam mechanism comprises a cam (4), the cam (4) being rotatably mounted on the lock body (1) via a cam shaft (2), and guide cylinders being provided at both ends of a disc of the cam (4).

6. The compression locking device according to claim 5, characterized in that: The rotation of the cam (4) includes an unloaded approach section, a variable speed drive section and a locking bearing section, wherein the preferred range of the rotation angle of the unloaded approach section cam (4) is 55-65°, which is used to drive the lock tongue (13) to swing rapidly until it begins to press the corresponding lock buckle; the preferred range of the rotation angle of the variable speed drive section cam (4) is 260-275°, during which the pressure angle of the cam (4) gradually decreases from 35° to 25° as the stroke increases; the preferred range of the locking bearing section angle is 25-32°, during which the cam is designed to be nearly concentric.

7. The compression locking device according to claim 1, characterized in that: The lock tongue (13) is rotatably mounted on the lock body (1) via a lock tongue shaft (15), and guide cylinders are provided at both ends of the lock tongue (13).

8. The compression locking device according to claim 5, characterized in that: The energy storage element comprises an unlocking spring (12) and a lock tongue reset spring (14); there are two unlocking springs (12), which are respectively mounted on guide cylinders at both ends of the cam (4), and the two unlocking springs (12) are correspondingly connected to the cam (4) and the lock body (1); the unlocking spring (12) realizes the reset of the cam mechanism; the lock tongue reset spring (14) is mounted on the guide cylinder of the lock tongue (13), and the two ends of the lock tongue reset spring (14) are correspondingly connected to the lock tongue (13) and the lock body (1); the lock tongue reset spring (14) realizes the reset of the lock tongue (13).

9. A control system, characterized in that: It comprises the clamping and locking device as described in any one of claims 1 to 8 and a controller, wherein the controller is used to issue control instructions to the power unit and the spring friction brake device.

10. A control method based on the control system according to claim 9, characterized in that: include: The controller issues a locking command, the power unit drives the deceleration device, the deceleration device drives the lock tongue (13) to rotate to a locked position, the moving iron core of the electromagnet (20) of the control unit in the spring friction brake device contracts, and drives the wheel hub spring (18) to frictionally brake the wheel hub (16), thereby achieving braking of the transmission mechanism; The controller issues an unlocking command, the power unit is short-circuited to achieve initial buffering, the spring friction brake device loses power and resets, thereby relieving the braking of the transmission mechanism; the energy storage element releases energy and reversely drives the transmission mechanism to achieve reset and unlocking of the lock tongue (13); or the power unit is energized, and the power unit reversely drives the transmission mechanism to achieve reset and unlocking of the lock tongue (13); When the control system loses power, the spring friction brake device loses power and resets, thereby relieving the braking of the transmission mechanism; the energy storage element releases energy and reversely drives the transmission mechanism, thereby resetting and unlocking the lock tongue (13).

Images