A telescopic pedal device

Abstract

The present invention discloses a telescopic pedal device. A sill is provided above the pedal frame, and a cover plate is installed on the top of the pedal frame. A driving motor is arranged inside the pedal frame, and the driving motor drives the movable pedal inside the telescopic device to expand and contract. A locking and isolation component is arranged inside the pedal frame, and the locking and isolation component is locked with the lock catch on the movable pedal. In the present invention, a synchronous belt or chain tensioning device and a front bearing and guiding component are installed below the movable pedal, with a compact structure and small occupied space; after the pedal is retracted, it is locked by both an electric motor brake and a mechanical locking hook, which is safer and more reliable; the pedal isolation lock can only perform isolation operation after the pedal is retracted, having the function of preventing misoperation; both the pedal isolation and unlocking are operated by steel wires, avoiding setting a lock core operating device on the upper cover plate; the pedal motor unlocking component is unlocked by using a rotatable bracket; the pedal cover plate has good sealing performance, facilitating the overhaul and maintenance of the interior of the pedal.

Description

Technical Field

[0001] The present invention relates to a telescopic pedal device, belonging to the technical field of vehicle device design. Background Art

[0002] When a rail transit train stops at a platform, in order to compensate for the gap or height difference between the vehicle and the platform, pedals are usually installed in the area of the train door or under the vehicle. The compensation width of the pedal is generally the same as the passing width of the door system. When the pedal is installed below the floor surface in the area of the vehicle door, it is required that the installation space of the pedal is small. The cover plate located above the pedal not only needs to bear the corresponding load requirements, but also needs to be used as a maintenance window, which is convenient to open for maintaining the pedal. At the same time, the cover plate is required to have a good sealing function.

[0003] The existing installation structure of the upper cover plate of the pedal is complex, the sealing effect is poor, and it is not convenient to open for maintaining the pedal. In addition, the existing pedal unlocking and isolation usually adopt a lock core structure installed inside the pedal. The surface of the cover plate needs to be provided with a lock core operation hole. The lock core is prone to dust accumulation and water seepage, resulting in lock core jamming, which is inconvenient to use and maintain and affects the appearance of the cover plate. In addition, limited by the position of the lock core, the cover plate is not convenient to install and adjust. In addition, the existing pedal usually adopts an electric motor brake to lock, and the locking method is single. When the brake fails or the transmission component has a loosening failure, there is a risk that the pedal will be thrown out after the vehicle runs. Summary of the Invention

[0004] Objective: In order to overcome the deficiencies in the prior art that there is an electric motor brake lock with a single locking method and poor maintainability, the present invention provides a telescopic pedal device to improve the locking, isolation reliability, sealing performance, and maintainability of the existing pedal for rail transit trains, and provides a corresponding unlocking structure and unlocking method.

[0005] Technical Solution: To solve the above technical problems, the technical solution adopted by the present invention is as follows:

[0006] A telescopic pedal device includes: a sill, a pedal frame. A sill is arranged above the pedal frame, a cover plate is installed on the top of the pedal frame, a driving motor is arranged inside the pedal frame, the driving motor drives the movable pedal at the end of the telescopic device to expand and contract, and a locking and isolating component is arranged inside the pedal frame, and the locking and isolating component is locked with a lock catch on the movable pedal.

[0007] As a preferred solution, the locking and isolating assembly includes a mechanical locking hook and an isolating locking hook. When the mechanical locking hook is in the locked state, the mechanical locking hook is engaged with the locking buckle. The rotation direction in which the mechanical locking hook is rotated to unlock from the locking buckle is defined as the first rotation direction, and the rotation direction opposite to the first rotation direction is defined as the second rotation direction. A torsion spring is provided on the mechanical locking hook, and a rotating shaft is sleeved inside the torsion spring. The mechanical locking hook rotates in the first rotation direction under the action of the torsion spring. The lower edge of the mechanical locking hook contacts one end of the stopper. A flange is provided on the mechanical locking hook, and a torsion spring is provided inside the stopper. A rotating shaft is sleeved inside the torsion spring, and an unlocking turntable is provided at the top of the rotating shaft. The stopper rotates in the second rotation direction under the action of the torsion spring. An unlocking device is provided at the other end of the stopper, and a retractable hook is provided on the unlocking device. The unlocking turntable is connected to one end of the first unlocking steel cable, and the first unlocking steel cable drives the stopper to rotate in the first rotation direction. The unlocking turntable is also connected to one end of the second unlocking steel cable, and the other end of the second unlocking steel cable is connected to the free end of the unlocking bracket. A torsion spring is provided at the top of the unlocking bracket, and a rotating shaft is provided inside the torsion spring. The unlocking bracket rotates in the second rotation direction under the action of the torsion spring. The second unlocking steel cable drives the unlocking bracket to rotate in the first rotation direction along with the rotating unlocking turntable. The unlocking bracket contacts the motor brake handle;

[0008] A torsion spring is provided inside the isolating locking hook, and a rotating shaft is sleeved inside the torsion spring. An isolating turntable is provided at the top of the rotating shaft. The isolating locking hook rotates in the second rotation direction under the action of the torsion spring. The isolating turntable is connected to one end of the isolating steel cable, and the isolating steel cable drives the isolating locking hook to rotate in the first rotation direction. In the isolated state, the isolating steel cable drives the isolating locking hook to rotate in the first rotation direction and is engaged with the mechanical locking hook in the locked state.

[0009] As a preferred solution, the latch includes a first latch and a second latch, and the locking and isolating assembly includes a mechanical locking hook and an isolating locking hook. When the mechanical locking hook is in the locked state, the mechanical locking hook is engaged with the first latch. The rotation direction in which the mechanical locking hook is rotated to unlock it from the first latch is defined as the first rotation direction, and the rotation direction opposite to the first rotation direction is defined as the second rotation direction. A torsion spring is provided inside the mechanical locking hook, and a rotating shaft is sleeved on the torsion spring. The mechanical locking hook rotates in the first rotation direction under the action of the torsion spring. The lower edge of the mechanical locking hook contacts one end of a stop member. A flange is provided on the mechanical locking hook. A torsion spring is provided inside the stop member, and a rotating shaft is sleeved inside the torsion spring. An unlocking turntable is provided at the top of the rotating shaft. The stop member rotates in the second rotation direction under the action of the torsion spring. An unlocking device is provided at the other end of the stop member, and a retractable hook is provided on the unlocking device. The unlocking turntable is connected to one end of a first unlocking steel cable, and the first unlocking steel cable drives the stop member to rotate in the first rotation direction. The unlocking turntable is also connected to one end of a second unlocking steel cable, and the other end of the second unlocking steel cable is connected to the free end of an unlocking bracket. A torsion spring is provided at the top of the unlocking bracket, and a rotating shaft is provided inside the torsion spring. The unlocking bracket rotates in the second rotation direction under the action of the torsion spring. The second unlocking steel cable drives the unlocking bracket to rotate in the first rotation direction along with the rotating unlocking turntable. The unlocking bracket contacts an electric motor brake handle;

[0010] A torsion spring is provided inside the isolating locking hook, and a rotating shaft is sleeved inside the torsion spring. An isolating turntable is provided at the top of the rotating shaft. The isolating locking hook rotates in the second rotation direction under the action of the torsion spring. The isolating turntable is connected to one end of an isolating steel cable, and the isolating steel cable drives the isolating locking hook to rotate in the first rotation direction. In the isolated state, the isolating steel cable drives the isolating locking hook to rotate in the first rotation direction and is engaged with the second latch in the locked state.

[0011] As a preferred solution, it further includes a limiting groove and a first limiting element. A limiting groove is provided on the mechanical locking hook, and a first limiting element is provided on the isolating locking hook. The first limiting element rotates synchronously with the isolating locking hook. When the mechanical locking hook is in the locked state, the free end of the first limiting element rotates along the limiting groove until the mechanical locking hook is engaged with the isolating locking hook.

[0012] As a preferred solution, it further includes a second limiting element. The isolating locking hook further includes a second flange. The second limiting element is provided with a torsion spring, and a rotating shaft is sleeved inside the torsion spring. The second limiting element rotates in the first rotation direction under the action of the torsion spring. One end of the second limiting element is engaged with the second flange on the isolating locking hook in the initial state. After the second latch is retracted, it pushes the second limiting element to rotate in the second rotation direction, and the second limiting element is disengaged from the second flange of the isolating locking hook.

[0013] As a preferred solution, displacement sensors are provided on one side of the unlocking bracket, the mechanical locking hook, and the isolation locking hook. When the unlocking bracket activates the motor brake handle and the mechanical locking hook and the isolation locking hook are in the locked and isolated state, the displacement sensors are triggered.

[0014] As a preferred solution, a buffer is provided inside the pedal frame.

[0015] As a preferred solution, it further includes a left pressing strip, a right pressing strip, and a rear pressing strip. The left pressing strip, the right pressing strip, and the rear pressing strip are respectively installed above the left, right, and rear of the pedal frame. The front part of the cover plate overlaps on the step at the rear of the threshold, and the left, right, and rear sides of the cover plate respectively overlap on the steps on the inner side of the left pressing strip, the right pressing strip, and the rear pressing strip. The step edges of the threshold and the pressing strip are both provided with rubber sealing strips.

[0016] As a preferred solution, the cover plate is connected to the cover plate support inside the pedal frame through fastening elements, and a torsion spring for lifting the cover plate is provided below the cover plate support.

[0017] As a preferred solution, the telescopic device includes a transmission shaft. The driving motor drives the transmission shaft to rotate through a gear or a belt pulley. Synchronous belts are installed at both ends of the transmission shaft, and the other ends of the synchronous belts are installed on one end of a tensioning device. Clamping plates on the connecting parts on both sides of the movable pedal are connected to the synchronous belts, and a load-bearing guiding component is installed at the other end of the tensioning device for supporting and guiding the inside of the connecting parts on both sides of the movable pedal.

[0018] As a preferred solution, a plurality of load-bearing wheels and lateral support wheels are installed inside the load-bearing guiding component. The load-bearing wheels support the inside of the connecting parts on both sides of the movable pedal when a vertical force is applied to the front part of the movable pedal, and the lateral support rollers contact the inner sides of the connecting parts on both sides of the movable pedal to guide the movable pedal.

[0019] As a preferred solution, a plurality of load-bearing rollers are installed on one side of the connecting parts on both sides of the movable pedal, height-adjusting rollers are installed on the other side, and lateral support rollers are installed on the other side. The load-bearing rollers roll inside the C-shaped guide rails on both sides of the pedal frame; the height-adjusting rollers also roll inside the C-shaped guide rails to compensate for the gap between the load-bearing rollers and the C-shaped guide rails; the lateral support rollers contact the inner side of the pedal frame and can roll along the side of the pedal frame to prevent the rear part of the movable pedal from swaying left and right.

[0020] Beneficial effects: The retractable pedal device provided by the present invention is driven by a motor and uses a synchronous belt or a chain drive. The synchronous belt or chain tensioning device and the front bearing and guiding assembly are installed under the movable pedal, with a compact structure and small space occupation. After the pedal is retracted, it is double-locked by an electric motor brake and a mechanical locking hook, which is safer and more reliable. The pedal isolation lock can only be isolated after the pedal is retracted, avoiding isolation when the pedal is open, and having a function of preventing misoperation. The pedal isolation and unlocking are both operated by a steel wire rope, avoiding setting a lock core operating device on the upper cover plate, which affects the appearance and sealing of the cover plate. The pedal motor unlocking assembly uses a rotatable bracket for unlocking, with a small unlocking force, a simple structure, and convenient operation of the steel wire rope. In addition, the pedal cover plate has a simple structure, good sealing performance, is convenient for installation and disassembly, has a large opening area, and is convenient for maintenance and repair of the inside of the pedal. Description of the Drawings

[0021] Figure 1 is an assembly schematic diagram of the retracted state of the retractable pedal device of the present invention.

[0022] Figure 2 is a partial schematic diagram of the connection between the right side strip and the rear strip.

[0023] Figure 3 is a schematic diagram of the structure of the fixed and popped-up cover plate.

[0024] Figure 4 is a schematic diagram of the structure of the driving motor of the movable pedal.

[0025] Figure 5 is a schematic diagram of the structure of the telescopic mechanism of the movable pedal.

[0026] Figure 6 is an exploded schematic diagram of the telescopic mechanism of the movable pedal.

[0027] Figure 7 is a schematic diagram of the states of the locking and isolating components when the movable pedal of Embodiment 1 extends.

[0028] Figure 8 is a schematic diagram of the states of the locking and isolating components when the movable pedal of Embodiment 1 retracts.

[0029] Figure 9 is a schematic diagram of the structures of the mechanical locking hook, the isolation locking hook, and the stopper.

[0030] Figure 10 is a schematic diagram of the structure of the manual starting handle of the electric motor brake of the driving motor.

[0031] Figure 11 is a schematic diagram of the states of the locking and isolating components when the movable pedal of Embodiment 2 retracts.

[0032] Figure 12It is a schematic structural diagram of the mechanical locking hook, isolation locking hook, and stopper in Embodiment 2.

[0033] Figure 13 It is a schematic structural diagram including a limit groove and a limit element in Embodiment 1.

[0034] Figure 14 It is a schematic structural diagram including a second limit element in Embodiment 2. Detailed implementation manners

[0035] The present invention will be further described below in conjunction with specific embodiments.

[0036] As Figure 1 shown, for a telescopic pedal device of the present invention, a threshold 2 is installed at the front upper part of a pedal frame 1, a left pressing strip 4, a right pressing strip 5, and a rear pressing strip 6 are respectively installed at the left, right, and rear upper parts of the pedal frame. The left pressing strip 4 and the right pressing strip 5 can be adjusted left and right, and the rear pressing strip 6 can be adjusted front and back.

[0037] As Figure 2 shown, a cover plate 3 is installed on the top of the pedal frame 1. The front part of the cover plate 3 overlaps on a step 101 at the rear of the threshold 2, and the left, right, and rear sides of the cover plate 3 respectively overlap on steps 101 inside the left pressing strip 4, the right pressing strip 5, and the rear pressing strip 6. Rubber sealing strips 7 are provided at the edges of the steps 101 of the threshold 2 and the pressing strips. When installing the cover plate 3, the gap between the cover plate 3 and the pressing strips can be eliminated by adjusting the installation position of the pressing strips and the top surface of the pedal frame.

[0038] As Figure 3 shown, after the cover plate 3 is connected to a cover plate support 9 inside the pedal frame 1 through a fastening element 8, the rubber sealing strips 7 around the bottom of the cover plate 3 are pressed tightly to play a sealing role. After the fastening element 8 for the cover plate 3 is disassembled and installed, a torsion spring 10 installed below the cover plate support 9 can bounce up the rear part of the cover plate 3 to facilitate the disassembly of the cover plate.

[0039] As Figure 4 shown, a driving motor 11 is installed inside the pedal frame 1. When the driving motor 11 works, it drives a transmission shaft 1301 of a transmission assembly 13 to rotate through a gear or a belt pulley 12.

[0040] As Figures 5-6 shown, synchronous belts 1302 are installed at both ends of the transmission shaft 1301, and the other ends of the synchronous belts are installed on one end of a tensioning device 14 for fixing the other ends of the synchronous belts. Clamping plates 1501 on the connecting parts on both sides of a movable pedal 15 are connected to the synchronous belts 1302. The transmission assembly 13 drives the synchronous belts 1302 to rotate reciprocally under the drive of the driving motor 11, and the clamping plates 1501 move synchronously with the synchronous belts 1302 to drive the movable pedal 15 to achieve telescopic movement.

[0041] At the other end of the tensioning device 14, a load-bearing guiding assembly 16 is installed, which is used to support and guide the interior of the connecting parts on both sides of the movable pedal 15. A plurality of load-bearing wheels 1601 and lateral support wheels 1602 are installed inside the load-bearing guiding assembly 16. When a vertical force is applied to the front part of the movable pedal 15, the load-bearing wheels 1601 support the interior of the connecting parts on both sides of the movable pedal 15. The lateral support rollers 1602 are in contact with the inner sides of the connecting parts on both sides of the movable pedal 15, guiding the movable pedal 15 and preventing the front part of the movable pedal 15 from swaying left and right.

[0042] On one side of the connecting parts on both sides of the movable pedal 15, a plurality of load-bearing rollers 1502 and height-adjusting rollers 1503 are installed, and on the other side, lateral support rollers 1504 are installed. The load-bearing rollers 1502 roll inside the C-shaped guide rails 17 on both sides of the pedal frame; the height-adjusting rollers 1503 also roll inside the C-shaped guide rails 17 and can be height-adjusted to compensate for the gap between the load-bearing rollers 1502 and the C-shaped guide rails 17. The lateral support rollers 1504 can be adjusted left and right, are in contact with the inside of the pedal frame 1, and can roll along the side of the pedal frame 1 to prevent the rear part of the movable pedal 15 from swaying left and right.

[0043] Embodiment 1

[0044] As Figure 7 、 Figure 8 shown, the movable pedal adopts an integrated mechanical lock locking and isolation structure. A lock catch 1505 is installed at the rear end of the movable pedal 15. The mechanical lock locking and isolation assembly 18 is installed inside the pedal frame 1. As Figure 9 shown, the locking and isolation assembly 18 includes a mechanical lock hook 1801 and an isolation lock hook 1805. A torsion spring is arranged on the mechanical lock hook 1801, and a rotating shaft is sleeved inside the torsion spring. The rotating direction in which the mechanical lock hook 1801 is rotated to unlock with the lock catch 1505 is defined as the first rotating direction, and the rotating direction opposite to the first rotating direction is defined as the second rotating direction. In this embodiment, the first rotating direction is counterclockwise rotation, and the second rotating direction is clockwise rotation. The mechanical lock hook 1801 is kept rotating counterclockwise under the action of the torsion spring, and the mechanical lock hook is in an open state when the torsion spring is in a relaxed state; the lower edge of the mechanical lock hook is in contact with one end of a stop member 1802, and a flange 1803 is arranged on the mechanical lock hook for the mechanical lock hook to be in a static state after being clamped with one end of the stop member 1802. When the mechanical lock hook is in a locked state, the mechanical lock hook is clamped with the lock catch. A torsion spring is arranged inside the stop member 1802, and a rotating shaft is sleeved inside the torsion spring. An unlocking turntable 1809 is arranged at the top of the rotating shaft. The torsion spring is in a compressed state, keeping the stop member rotating clockwise. An unlocking device 1804 is arranged at the other end of the stop member 1802, and a retractable hook is arranged on the unlocking device 1804. The unlocking turntable 1809 is connected to one end of a first unlocking steel cable 1808, and the first unlocking steel cable drives the stop member to rotate counterclockwise. As Figure 10As shown, the unlocking turntable 1809 is also connected to one end of the second unlocking steel cable 1810, and the other end of the second unlocking steel cable 1810 is connected to the free end of the unlocking bracket 19. A torsion spring is provided at the top of the unlocking bracket, and a rotating shaft is provided inside the torsion spring. The second unlocking steel cable drives the unlocking bracket to rotate counterclockwise with the rotating unlocking turntable. The unlocking bracket 1809 contacts the motor brake handle 1101.

[0045] A separating lock hook 1805 is provided on one side of the mechanical lock hook. A torsion spring is provided inside the separating lock hook, and a rotating shaft is sleeved inside the torsion spring. A separating turntable 1807 is provided at the top of the rotating shaft. The torsion spring is in a compressed state, keeping the separating lock hook rotating clockwise. The separating turntable 1807 is connected to one end of the separating steel cable 1806, and the separating steel cable drives the separating lock hook to rotate counterclockwise. When the separating steel cable is in the initial state, it overcomes the clockwise rotating torque of the separating lock hook to keep the separating lock hook stationary. In the separated state, the separating lock hook rotates counterclockwise and is engaged with the mechanical lock hook in the locked state.

[0046] The working process of the mechanical lock locking and separating assembly in the first embodiment:

[0047] The locking and separating assembly 18 is installed in the middle area at the rear of the movable pedal 15. When the movable pedal 15 is retracted, in the final stage, the lock catch 1505 installed at the rear of the movable pedal contacts the mechanical lock hook 1801 and drives the mechanical lock hook 1801 to rotate. The mechanical lock hook slides along the upper end of the stopper. When it rotates to a certain angle, the upper end of the stopper 1802 cooperates with the rear flange 1803 of the mechanical lock hook 1801 and is engaged. It rotates under the action of the torsion spring inside the stopper until the mechanical lock hook and the stopper are stationary, preventing the mechanical lock hook 1801 from rotating in the reverse direction and playing a limiting role for the movable pedal 15. After the movable pedal 15 is completely retracted, the brake of the driving motor 11 brakes, and the movable pedal 15 is also locked through the transmission assembly 13. When the pedal is opened, the unlocking device 1804 drives the hook to retract, and the hook drives the stopper 1802 to rotate, releasing the clamping limit between the flange of the mechanical lock hook 1801 and the stopper. The mechanical lock hook 1801 rotates under the action of its own torsion spring and the drive of the lock catch, releasing the locked state, and the movable pedal 15 can be opened under the drive of the motor.

[0048] When the motor drive and unlocking device fails to work, pull the first unlocking steel cable 1808 to drive the unlocking turntable 1809 to rotate counterclockwise against the torsion of the torsion spring. The unlocking turntable 1809 pulls the end of the second unlocking steel cable 1810 to drive the unlocking bracket to rotate counterclockwise along the top, driving the motor brake handle to open. The motor is in a free state, and the movable pedal can be manually extended or retracted. Under the initial force of the torsion spring at its top, the unlocking bracket maintains a clockwise rotation, drives the unlocking turntable 1809 to rotate clockwise through the second unlocking steel cable 1810, and jointly acts with the torsion spring inside the stop member to keep the stop member rotating clockwise. When the top of the stop member slides along the smooth edge of the lower part of the mechanical lock hook, the stop member is relatively stationary. When the stop member passes the flange, the top of the stop member gains space and rotates until it engages and stops with the lower part of the mechanical lock hook. The unlocking bracket is always in a state of not driving the motor brake key.

[0049] In the open state of the movable pedal 15, the isolation lock hook 1805, under the action of its torsion spring, cooperates with the tension of the isolation steel cable 1806 to maintain a stationary state and cannot rotate to isolate. After the movable pedal 15 is retracted, the mechanical lock hook 1801 rotates into place, and drives the isolation lock hook 1805 under the isolation turntable to rotate by pulling the isolation steel cable against the torsion of the torsion spring, and engages with the mechanical lock hook to complete the isolation state. After the movable pedal 15 is isolated, it cannot be opened electrically or manually.

[0050] When the isolation state needs to be released, loosen the isolation steel cable to the initial tension. The isolation lock hook rotates clockwise under the action of its torsion spring and disengages from the mechanical lock hook until the isolation lock hook maintains a stationary state.

[0051] Embodiment 2:

[0052] As Figures 11-12As shown in the figure, the movable pedal adopts a split mechanical lock locking and isolating structure. A lock catch 1505 and a second lock catch 1506 are installed at the rear end of the movable pedal 15. The locking and isolating assembly 18 is installed in the pedal frame 1. The locking and isolating assembly 18 includes a mechanical lock hook and an isolating lock hook. The rotation direction in which the mechanical lock hook 1801 is rotated to unlock with the lock catch 1505 is defined as the first rotation direction, and the rotation direction opposite to the first rotation direction is defined as the second rotation direction. In this embodiment, the first rotation direction is counterclockwise rotation, and the second rotation direction is clockwise rotation. A torsion spring is arranged inside the mechanical lock hook, and a rotating shaft is sleeved inside the torsion spring. The mechanical lock hook is kept rotating counterclockwise under the action of the torsion spring. When the torsion spring is in a relaxed state, the mechanical lock hook is in an open state; the lower edge of the mechanical lock hook is in contact with one end of the stop member. A flange 1803 is arranged on the mechanical lock hook for the mechanical lock hook and the stop member to be in a stationary state after being clamped with one end of the stop member 1802. A torsion spring is arranged inside the stop member, and a rotating shaft is sleeved inside the torsion spring. An unlocking turntable is arranged at the top of the rotating shaft. The torsion spring is in a compressed state to keep the stop member rotating clockwise. An unlocking device is arranged at the other end of the stop member. A retractable hook is arranged on the unlocking device. The unlocking turntable is connected with one end of a first unlocking steel cable, and the first unlocking steel cable drives the stop member to rotate counterclockwise. The unlocking turntable is also connected with one end of a second unlocking steel cable, and the other end of the second unlocking steel cable is connected with the free end of the unlocking bracket. The second unlocking steel cable drives the unlocking bracket to rotate counterclockwise along with the rotating unlocking turntable. The unlocking bracket 1809 is in contact with the motor brake handle 1101.

[0053] An isolating lock hook 1805 is arranged on one side of the mechanical lock hook. A torsion spring is arranged inside the isolating lock hook, and a rotating shaft is sleeved inside the torsion spring. An isolating turntable 1807 is arranged at the top of the rotating shaft. The torsion spring is in a compressed state to keep the isolating lock hook rotating clockwise. The isolating turntable 1807 is connected with one end of an isolating steel cable 1806, and the isolating steel cable drives the isolating lock hook to rotate counterclockwise. When the isolating steel cable is in an initial state, the isolating lock hook is kept stationary by overcoming the clockwise rotating torque of the isolating lock hook. In an isolating state, the isolating lock hook rotates counterclockwise and is clamped with the mechanical lock hook in a locked state.

[0054] The working process of the mechanical lock locking and isolating assembly in the second embodiment: The processes of automatic locking, opening, manual locking, and opening of the movable pedal 15 are the same as those in the first embodiment. The working processes of isolation and release of the isolating lock hook are also the same. However, different from the first embodiment, in an isolating state, the isolating lock hook is clamped with the second lock catch 1506.

[0055] Embodiment 3:

[0056] As Figure 13As shown, for the integrated mechanical lock locking and isolating structure, the mechanical lock hook 1801 further includes a limit groove 18011, and the isolating lock hook 1805 further includes a first limit element 18051. A limit groove is provided on the mechanical lock hook, and a first limit element is provided on the isolating lock hook. The first limit element rotates synchronously with the isolating lock hook. When the mechanical lock hook is in the locked state, the free end of the first limit element rotates along the limit groove until the mechanical lock hook is engaged with the isolating lock hook. The structure in which the limit groove cooperates with the first limit element is used to ensure that the mechanical lock hook and the lock catch are locked in place.

[0057] Embodiment 4:

[0058] As Figure 14 shown, for the split mechanical lock locking and isolating structure, it further includes a second limit element 1811, and the isolating lock hook 1805 further includes a second flange 18052. A torsion spring is provided on the second limit element, and a rotating shaft is sleeved inside the torsion spring. The second limit element rotates counterclockwise under the action of the torsion spring. One end of the second limit element is engaged with the second flange on the isolating lock hook in the initial state. After the second lock catch 1506 is retracted, it pushes the second limit element to rotate clockwise, and the second limit element is disengaged from the second flange of the isolating lock hook. The isolating lock hook is not restricted by the second limit element and is engaged with the second lock catch under the drive of the isolating steel rope, which is used to further ensure that when the second lock catch is not closed in place, the isolating lock hook maintains its initial state.

[0059] Embodiment 5:

[0060] Displacement sensors are provided on one side of the unlocking bracket, the mechanical lock hook, and the isolating lock hook. When the unlocking bracket activates the motor brake handle and the mechanical lock hook and the isolating lock hook are in the locked and isolated state, the displacement sensors are triggered.

[0061] Embodiment 6:

[0062] A buffer is provided inside the pedal frame to buffer the closing of the movable pedal.

[0063] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A telescopic pedal device, comprising: Threshold and pedal frame, characterized in that: a threshold is provided above the pedal frame, a cover plate is installed on the top of the pedal frame, a driving motor is arranged inside the pedal frame, the driving motor drives the movable pedal at the end of the telescopic device to stretch, a locking and isolating component is arranged inside the pedal frame, and the locking and isolating component is locked with the lock catch on the movable pedal; The locking and isolating component includes a mechanical locking hook and an isolating locking hook. When the mechanical locking hook is in the locked state, the mechanical locking hook is engaged with the lock catch. The rotation direction for rotating the mechanical locking hook to unlock it from the lock catch is defined as the first rotation direction, and the rotation direction opposite to the first rotation direction is defined as the second rotation direction. A torsion spring is arranged on the mechanical locking hook, a rotating shaft is sleeved inside the torsion spring, and the mechanical locking hook rotates in the first rotation direction under the action of the torsion spring. The lower edge of the mechanical locking hook is in contact with one end of a stop member. A flange is arranged on the mechanical locking hook, a torsion spring is arranged inside the stop member, a rotating shaft is sleeved inside the torsion spring, an unlocking turntable is arranged at the top of the rotating shaft, and the stop member rotates in the second rotation direction under the action of the torsion spring. An unlocking device is arranged at the other end of the stop member, and a retractable hook is arranged on the unlocking device. The unlocking turntable is connected to one end of a first unlocking steel cable, and the first unlocking steel cable drives the stop member to rotate in the first rotation direction. The unlocking turntable is also connected to one end of a second unlocking steel cable, and the other end of the second unlocking steel cable is connected to the free end of an unlocking bracket. A torsion spring is arranged at the top of the unlocking bracket, a rotating shaft is arranged inside the torsion spring, and the unlocking bracket rotates in the second rotation direction under the action of the torsion spring. The second unlocking steel cable drives the unlocking bracket to rotate in the first rotation direction along with the rotating unlocking turntable, and the unlocking bracket is in contact with the motor brake handle; A torsion spring is arranged inside the isolating locking hook, a rotating shaft is sleeved inside the torsion spring, an isolating turntable is arranged at the top of the rotating shaft, and the isolating locking hook rotates in the second rotation direction under the action of the torsion spring. The isolating turntable is connected to one end of an isolating steel cable, and the isolating steel cable drives the isolating locking hook to rotate in the first rotation direction. In the isolated state, the isolating steel cable drives the isolating locking hook to rotate in the first rotation direction and is engaged with the mechanical locking hook in the locked state.

2. The telescopic pedal device according to claim 1, wherein: The latch includes a first latch and a second latch. The locking and isolating assembly includes a mechanical locking hook and an isolating locking hook. When the mechanical locking hook is in the locked state, the mechanical locking hook is engaged with the first latch. The rotation direction for unlocking the mechanical locking hook from the first latch after rotation is defined as the first rotation direction, and the rotation direction opposite to the first rotation direction is defined as the second rotation direction. A torsion spring is arranged inside the mechanical locking hook, and a rotating shaft is sleeved on the torsion spring. The mechanical locking hook rotates in the first rotation direction under the action of the torsion spring. The lower edge of the mechanical locking hook contacts one end of a stop member. A flange is arranged on the mechanical locking hook. A torsion spring is arranged inside the stop member, and a rotating shaft is sleeved inside the torsion spring. An unlocking turntable is arranged at the top of the rotating shaft. The stop member rotates in the second rotation direction under the action of the torsion spring. An unlocking device is arranged at the other end of the stop member, and a retractable hook is arranged on the unlocking device. The unlocking turntable is connected to one end of a first unlocking steel cable, and the first unlocking steel cable drives the stop member to rotate in the first rotation direction. The unlocking turntable is also connected to one end of a second unlocking steel cable, and the other end of the second unlocking steel cable is connected to the free end of an unlocking bracket. A torsion spring is arranged at the top of the unlocking bracket, and a rotating shaft is arranged inside the torsion spring. The unlocking bracket rotates in the second rotation direction under the action of the torsion spring. The second unlocking steel cable drives the unlocking bracket to rotate in the first rotation direction along with the rotating unlocking turntable. The unlocking bracket contacts an electric motor brake handle; A torsion spring is arranged inside the isolating locking hook, and a rotating shaft is sleeved inside the torsion spring. An isolating turntable is arranged at the top of the rotating shaft. The isolating locking hook rotates in the second rotation direction under the action of the torsion spring. The isolating turntable is connected to one end of an isolating steel cable, and the isolating steel cable drives the isolating locking hook to rotate in the first rotation direction. In the isolated state, the isolating steel cable drives the isolating locking hook to rotate in the first rotation direction and is engaged with the second latch in the locked state.

3. The retractable pedal device according to claim 1, wherein: It further includes a limiting groove and a first limiting element. A limiting groove is arranged on the mechanical locking hook, and a first limiting element is arranged on the isolating locking hook. The first limiting element rotates synchronously with the isolating locking hook. When the mechanical locking hook is in the locked state, the free end of the first limiting element rotates along the limiting groove until the mechanical locking hook is engaged with the isolating locking hook.

4. The telescopic pedal device according to claim 2, characterized in that: It further includes a second limiting element. The isolating locking hook further includes a second flange. The second limiting element is provided with a torsion spring, and a rotating shaft is sleeved inside the torsion spring. The second limiting element rotates in the first rotation direction under the action of the torsion spring. One end of the second limiting element is engaged with the second flange on the isolating locking hook in the initial state. After the second latch is retracted, it pushes the second limiting element to rotate in the second rotation direction, and the second limiting element is disengaged from the second flange of the isolating locking hook.

5. A telescopic pedal device according to any one of claims 2 to 4, characterized in that: Displacement sensors are arranged on one side of the unlocking bracket, the mechanical locking hook, and the isolating locking hook. When the unlocking bracket activates the electric motor brake handle and the mechanical locking hook and the isolating locking hook are in the locked and isolated state, the displacement sensors are triggered.

6. A telescopic pedal device according to any one of claims 2 to 4, characterized in that: A buffer is arranged inside the pedal frame.

7. A telescopic pedal device according to any one of claims 2 to 4, characterized in that: It further includes a left side strip, a right side strip and a rear strip, which are respectively installed above the left, right and rear of the pedal frame. The front part of the cover plate overlaps on the step at the rear of the threshold, and the left, right and rear sides of the cover plate respectively overlap on the steps on the inner sides of the left side strip, the right side strip and the rear side strip. The step edges of the threshold and the strips are both provided with rubber sealing strips.

8. The retractable pedal device according to claim 7, wherein: The cover plate is connected to the cover plate support inside the pedal frame through fastening elements, and a torsion spring for lifting the cover plate is arranged below the cover plate support.

9. A telescopic pedal device according to any one of claims 2 to 4, characterized in that: The telescopic device includes a transmission shaft. The driving motor drives the transmission shaft to rotate through a gear or a pulley. Synchronous belts are installed at both ends of the transmission shaft, and the other ends of the synchronous belts are installed on one end of a tensioning device. Clamping plates on the connecting parts on both sides of the movable pedal are connected to the synchronous belts, and a bearing and guiding assembly is installed at the other end of the tensioning device for supporting and guiding the inside of the connecting parts on both sides of the movable pedal.

10. The telescopic pedal device according to claim 9, wherein: A plurality of bearing wheels and lateral support wheels are installed inside the bearing and guiding assembly. The bearing wheels support the inside of the connecting parts on both sides of the movable pedal when a vertical force is applied to the front part of the movable pedal, and the lateral support rollers contact the inner sides of the connecting parts on both sides of the movable pedal to guide the movable pedal.

11. The telescopic pedal device according to claim 9, wherein: A plurality of bearing rollers and height-adjusting rollers are installed on one side of the connecting parts on both sides of the movable pedal, and lateral support rollers are installed on the other side. The bearing rollers roll in the C-shaped guide rails on both sides of the pedal frame; the height-adjusting rollers also roll in the C-shaped guide rails to compensate for the gap between the bearing rollers and the C-shaped guide rails; the lateral support rollers contact the inner side of the pedal frame and can roll along the side surface of the pedal frame to prevent the rear part of the movable pedal from swaying left and right.

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