Seat moving device and control method thereof, seat and vehicle

Abstract

A seat moving device and a control method thereof, a seat and a vehicle, in the seat moving device, a gear mechanism (230) comprises a first gear (231) and a second gear (232) which are in transmission connection, a first moving device (210) is connected with a base (240) and a first rack (220), and the first rack (220) is engaged with the first gear (231); the second rack (250) is connected with the seat body (10), and the second rack (250) is meshed with the second gear (232); the locking device (260) is connected with the base (240) and the seat body (10), and the locking device (260) prevents the seat body (10) from moving towards the tail of the vehicle in the locking state. According to the seat moving device, when a vehicle collides or is about to collide, the distance between a driver and a vehicle head is increased, and the driver is prevented from being hurt.

Description

Seat moving device and control method thereof, seat and vehicle Technical Field

[0001] The embodiments of the present application relate to the field of automobile manufacturing technology, and more particularly to a seat moving device and a control method thereof, a seat, and a vehicle. Background Art

[0002] The cab of a vehicle is generally provided with a seat, which is connected to the vehicle body by bolts to fix the seat to the vehicle body. In the event of a collision, the front of the vehicle body is likely to deform into the cab, which is likely to cause injury to the person sitting in the seat.

[0003] Summary of the Invention

[0004] The embodiments of the present application provide a seat moving device and a control method thereof, a seat, and a vehicle, which can prevent the driver from being injured.

[0005] In a first aspect, an embodiment of the present application provides a seat moving device, comprising: a base, a gear mechanism, a second rack, a first moving device, and a first rack connected to the first moving device; the base is used to be connected to the vehicle body; the gear mechanism includes a first gear and a second gear in a transmission connection, and the first gear and the second gear are both rotatably connected to the base; the first moving device is connected to the base, and the first rack is meshed with the first gear; the second rack is used to be connected to the seat body, and the second rack is meshed with the second gear, and the length directions of the first rack and the second rack are both parallel to the longitudinal direction of the vehicle body; the first moving device is used to drive the first rack to move along its length direction so that the seat body moves along the longitudinal direction of the vehicle body; the gear mechanism is used to make the movement speed of the second rack greater than the movement speed of the first rack. The seat moving device also includes a locking device, which is connected to the base and the seat body, and prevents the seat body from moving in the locked state.

[0006] Through the above arrangement, the base is connected to the vehicle body, the gear mechanism includes a first gear and a second gear in a transmission connection, both of which are rotatably connected to the base, a first movable device is connected to the base and the first rack, the first rack meshing with the first gear; the second rack is connected to the seat body, the second rack meshing with the second gear, the length directions of the first rack and the second rack both being parallel to the longitudinal direction of the vehicle body, and the first movable device is used to drive the first rack to move along its length, thereby causing the seat body to move under the influence of the second rack; and a locking device is connected to both the base and the seat body, and when locked, the locking device prevents the seat body from moving. In the event of a vehicle collision or imminent collision, the first movable device drives the first rack to move, which in turn drives the second rack and the seat body to move via the gear mechanism, thereby increasing the distance between the driver and the front of the vehicle, thereby preventing the front of the vehicle from deforming into the cab and contacting the driver due to a collision, thereby preventing the driver from being injured.

[0007] In addition, the gear mechanism can make the moving speed of the second rack greater than the moving speed of the first rack. When the first moving device drives the first rack to move, the second rack can drive the seat body to move quickly under the speed-increasing action of the gear mechanism to avoid the front of the vehicle from deforming into the cab and causing harm to the driver, thereby improving the safety of the vehicle.

[0008] In some embodiments, including the above, the number of teeth on the first gear is smaller than that on the second gear. This allows the second rack to move faster than the first rack, allowing the seat to move quickly under the drive of the first moving device. Furthermore, the smaller number of teeth facilitates the design of a larger gear module and increases gear strength. This arrangement results in a simple structure and ease of manufacture.

[0009] In some embodiments including the above embodiments, the angular velocities of the first gear and the second gear are equal. This configuration can make the linear velocity of the second gear greater than the linear velocity of the first gear, thereby increasing the speed of the gear mechanism.

[0010] In some embodiments that may include the above embodiments, the first gear and the second gear are integrally formed. That is, the first gear and the second gear are coaxially arranged and integrally formed. This configuration, wherein the integral structure is formed by casting or forging, simplifies the structure of the moving device and reduces the difficulty of manufacturing and assembly.

[0011] In some embodiments including the above embodiments, a mounting bracket may be provided on the base, and shaft holes may be provided on the first and second gears. A rotating shaft may be provided in the shaft holes, and the rotating shaft may be connected to the mounting bracket to achieve a rotatable connection between the first and second gears and the base. It is understood that a bearing may be provided between the rotating shaft and the shaft holes to reduce rotational resistance of the first and second gears.

[0012] In some embodiments that may include the above embodiments, the first moving device includes a first electromagnet, the iron core of the first electromagnet being configured to attract the first rack. By driving the first rack to move by the first electromagnet, the first rack can be driven to move rapidly in the event of a collision or an imminent collision, and the second rack and the seat can be driven to move rapidly under the acceleration of the gear mechanism to prevent injury to the driver. Furthermore, the electromagnet exerts a relatively large instantaneous pulling force on the first rack, thereby ensuring sufficient pulling force while reducing the size of the first moving device.

[0013] In some embodiments that may include the above-mentioned embodiments, the first moving device may also include a moving motor, and a driving gear is provided on the main shaft of the moving motor, and the driving gear is engaged with the first rack; when a collision occurs or is about to occur, the moving motor drives the first rack to move through the driving gear, and under the acceleration action of the gear mechanism, drives the second rack and the seat to move quickly to prevent the driver from being injured.

[0014] In some embodiments, including those described above, the base includes a slide rail parallel to the longitudinal direction of the vehicle body. The slide rail cooperates with a locking device to prevent movement of the seat body when locked. This arrangement provides a simple structure and ease of manufacture. For example, a slide groove can be provided at the bottom of the seat cushion, into which the slide rail can slide. The cooperation between the slide rail and the slide groove can improve the stability of the seat and prevent it from shaking.

[0015] In some embodiments that may include the above-mentioned embodiments, a locking groove is provided on the slide rail, and the locking groove includes a first groove wall and a second groove wall provided along the longitudinal direction of the vehicle body, and along the longitudinal direction of the vehicle body, the second groove wall is farther away from the rear of the vehicle than the first groove wall; the locking device includes: a base, a locking rod, a first elastic member and a limiting device. The base is used to be connected to the seat body; the locking rod is slidably connected to the base, and a locking block is provided at the end of the locking rod; the first elastic member is connected to both the base and the locking block, and the first elastic member is used to move the locking block toward the locking groove so that the locking block contacts the first groove wall; the inclination angle of the first groove wall is smaller than the friction angle of the contact surface between the locking block and the first groove wall; the limiting device is provided on the base, and the limiting device is used to be connected to the locking rod in the locked state to prevent the locking rod from sliding relative to the base.

[0016] Through the above arrangement, the inclination angle of the first groove wall is smaller than the friction angle between the locking block and the contact surface of the first groove wall, thereby avoiding self-locking between the locking block and the first groove wall, so that when the first moving device drives the seat body to move, sliding can occur between the first groove wall and the locking block, causing the locking block to slide out of the locking groove.

[0017] In some embodiments that may include the above embodiments, the locking block includes a first surface and a second surface. In the locked state, the first surface contacts the first groove wall, and the second surface contacts the second groove wall. The inclination angle of the second groove wall is greater than the friction angle between the second surface and the second groove wall. This arrangement allows the locking block and the second groove wall to self-lock, and the locking device can prevent the seat from moving in either the unlocked or locked state.

[0018] In some embodiments that may include the above-mentioned embodiments, there are multiple locking grooves, and the multiple locking grooves are arranged along the longitudinal direction of the vehicle body. For example, the multiple locking grooves can be arranged sequentially along the longitudinal direction of the vehicle body, and the top of the first groove wall of the preceding locking groove can contact the top of the second groove wall of the following locking groove. Of course, the multiple locking grooves can also be arranged at intervals along the longitudinal direction of the vehicle body, and this embodiment of the application is not limited to this. In this arrangement, by positioning the locking blocks in different locking grooves when in the locked state, the distance between the seat and the front of the vehicle can be further adjusted, thereby increasing the adjustment range of the distance between the seat and the front of the vehicle.

[0019] In some embodiments that may include the above-mentioned embodiments, the limiting device includes: a limiting block, a second elastic member and a second moving device; the second elastic member is connected to the limiting block and the base, and the second elastic member is used to drive the limiting block to move toward the locking rod so that the limiting block is stuck in the limiting groove on the locking rod in the locked state; the second moving device is arranged on the base, the second moving device is connected to the limiting block, and the second moving device is used to drive the limiting block to move in a direction away from the locking rod when the locked state is released.

[0020] Through the above-mentioned arrangement, in the locked state, the second elastic member can keep the limit block in the limit groove to prevent the locking rod from moving, thereby achieving locking; when unlocking, the second moving device drives the limit block to move in the direction away from the locking rod, so that the limit block slides out of the limit groove, releasing the locking rod, thereby achieving unlocking; the unlocking speed can be increased, so that the seat can be moved quickly, further improving the safety of the vehicle.

[0021] In some embodiments that may include the above embodiments, the limiting device further includes a positioning boss that abuts a side of the limiting block away from the locking block and is slidably connected to the limiting block. In the locked state, the second elastic member drives the limiting block to engage within the limiting groove, and the positioning boss prevents the locking rod from sliding relative to the base via the limiting block.

[0022] In some embodiments that may include the above embodiments, the second moving device may include a second electromagnet, the second electromagnet being disposed on the base, and the iron core of the second electromagnet being configured to attract the limit block, so that when the second electromagnet is energized, the limit block is driven to move away from the locking rod. Of course, the second moving device may also include an electric push rod, the electric push rod being disposed on the base, the push rod of the electric push rod being connected to the limit block, and when the lock is released, the electric push rod drives the limit block to move away from the locking rod.

[0023] In some embodiments that may include the above embodiments, the second elastic member may include a second coil spring, one end of the second coil spring is connected to the base, the other end of the second coil spring is connected to the limit block, and the second coil spring is in a compressed state. In other implementations, the second elastic member may also include a second elastic sheet, one end of the second elastic sheet is connected to the base, and the other end of the second elastic sheet may be connected to the limit block. The elastic force of the second elastic sheet can drive the limit block to move toward the locking rod and keep the limit block in the limit groove.

[0024] In some embodiments that may include the above-mentioned embodiments, the limiting device includes: a limiting block, a second elastic member and a second moving device; the second elastic member is connected to the limiting block and the base, and the elastic member is used to drive the limiting block to move in a direction away from the locking rod; the second moving device is connected to the limiting block, and the second moving device is used to drive the limiting block to move toward the locking rod in the locked state, so that the limiting block is stuck in the limiting groove on the locking rod in the locked state.

[0025] With this arrangement, in the locked state, the second moving device drives the limit block toward the locking rod, thereby retaining the limit block within the limit slot and preventing movement of the locking rod. The driving force exerted on the limit block toward the locking rod is relatively strong, thereby preventing the limit block from disengaging from the limit slot and causing a mis-lock. Accordingly, in the unlocked state, the second moving device removes the driving force exerted on the limit block. Simultaneously, the second elastic member, through its own elastic force, drives the limit block away from the locking rod, and the limit block slides out of the limit slot, releasing the locking rod and thereby unlocking the door.

[0026] In some embodiments that may include the above-mentioned embodiments, the second movable device may include a second electromagnet, the second electromagnet being disposed on the base, and the iron core of the second electromagnet being used to attract the limit block, so that when the second electromagnet is energized, the limit block is driven to move toward the locking rod to achieve locking. Of course, the second movable device may also include an electric push rod, the electric push rod being disposed on the base, the push rod of the electric push rod being connected to the limit block, and when locked, the electric push rod drives the limit block to move toward the locking rod. The embodiments of the present application are not limited to the second movable device, as long as it can drive the limit block to move toward the locking rod when locked, thereby keeping the limit block in the limit slot. It is understood that in the locked state, the second movable device can always be energized, and when unlocked, the second movable device is de-energized, and then, under the elastic force of the second elastic member, drives the limit block to move in a direction away from the locking rod, and the limit block slides out of the limit slot to release the locking rod.

[0027] In some embodiments that may include the above embodiments, the second elastic member may include a second coil spring, one end of the second coil spring is connected to the base, and the other end of the second coil spring may be connected to the limit block. In the locked state, the second coil spring is in a stretched state. In other implementations, the second elastic member may also include a second elastic sheet, one end of the second elastic sheet is connected to the base, and the other end of the second elastic sheet may be connected to the limit block. The elastic force of the second elastic sheet can drive the limit block to move away from the locking rod.

[0028] In some embodiments that may include the above-mentioned embodiments, the locking groove is provided on a predetermined surface of the slide rail, and a first stop is provided on the predetermined surface. The first stop is located on the side of the locking groove that faces the rear of the vehicle, and the first stop is used to prevent the locking block from moving toward the rear of the vehicle. This arrangement can prevent the seat from moving too far, thereby preventing the seat from separating from the slide rail.

[0029] In some embodiments that may include the above embodiments, in an implementation where the locking groove is provided on the top surface of the slide rail, the predetermined surface is the top surface of the slide rail. The first stop portion may include a protrusion located on the top surface, with a certain distance between the protrusion and the top surface to ensure that after the locking block contacts the first stop portion, even if the locking block moves to the extreme position away from the slide rail, it is difficult to pass the first stop portion.

[0030] In a second aspect, an embodiment of the present application further provides a seat movement device control method for the seat movement device described above, the seat movement device control method comprising:

[0031] Obtain vehicle driving data;

[0032] Analyze driving data to form collision judgment results;

[0033] If the collision determination result is yes, the locking device is controlled to release the lock on the seat body, and the first moving device is controlled to drive the first rack to move.

[0034] The seat movement device control method provided in an embodiment of the present application analyzes driving data to form a collision determination result. If the collision determination result is positive, the locking device is controlled to unlock the seat body and the first movement device is controlled to drive the first rack to move. Specifically, if the vehicle is involved in a collision or is about to collide, the first movement device drives the first rack to move, which in turn drives the second rack and the seat body via a gear mechanism to move, thereby increasing the distance between the driver and the front of the vehicle. This prevents the front of the vehicle from deforming into the cab and contacting the driver during a collision, thereby preventing injury to the driver.

[0035] In some embodiments that may include the above-described embodiments, analyzing driving data to obtain a collision determination result includes: obtaining the vehicle's collision time, the operating status of the automatic emergency braking system, and the vehicle's deceleration based on the driving data; and determining a collision determination result of "yes" when the collision time is less than a set value, the automatic emergency braking system is engaged, and the vehicle's deceleration reaches an upper limit. With this arrangement, whether a vehicle is about to collide is comprehensively determined based on the collision time, emergency braking status, and vehicle deceleration, thereby improving the accuracy of the determination and thereby enhancing vehicle safety.

[0036] In some embodiments that may include the above embodiments, the vehicle driving data obtained includes: current vehicle speed, vehicle deceleration, brake pedal opening, and vehicle distance. Driving data is obtained by using the vehicle's existing sensors, radar, cameras, and other detection equipment, eliminating the need for additional detection equipment to detect driving data, simplifying the vehicle structure and reducing vehicle production costs.

[0037] In some embodiments that may include the above-mentioned embodiments, the seat movement device control method further includes: receiving an airbag triggering signal; upon receiving the airbag triggering signal, controlling the locking device to unlock the seat body and controlling the first movement device to drive the first rack to move. With this arrangement, when the airbag deploys, the onboard computer controls the locking device to unlock the seat body and controls the first movement device to drive the seat body to move, thereby preventing injury to the driver and further improving vehicle safety.

[0038] In a third aspect, an embodiment of the present application further provides a seat, comprising: a seat body and the seat moving device as described above, wherein the seat body is connected to the seat moving device.

[0039] The seat provided in the embodiment of the present application includes the seat moving device in any of the above embodiments, so the two can solve the same technical problems and achieve the same technical effects.

[0040] In some embodiments that may include the above-mentioned embodiments, the seat body includes a seat cushion and a backrest connected to the seat cushion, and the seat movement device is connected to the seat cushion. The seat also includes an adjustment device connected to the base and the vehicle body, and the adjustment device is configured to drive the seat cushion to move longitudinally of the vehicle body. In the event of a vehicle collision or imminent collision, the first movement device drives the first rack to move, and the second rack drives the seat to move. While the vehicle is moving or stopped, the adjustment device can use the seat movement device to drive the seat to move longitudinally of the vehicle body to adjust the distance between the seat and the front of the vehicle.

[0041] In other implementations, the second rack is connected to the seat cushion via an adjustment mechanism, which drives the seat cushion to move longitudinally along the vehicle body. In the event of a collision or imminent collision, the first movement mechanism drives the first rack, while the second rack drives the seat via the adjustment mechanism. While the vehicle is moving or stopped, the driver can adjust the distance between the seat and the front of the vehicle using the adjustment mechanism to improve ride comfort.

[0042] In a fourth aspect, an embodiment of the present application further provides a vehicle, comprising: a vehicle body and the seat as described above, wherein the seat is arranged on the vehicle body.

[0043] The vehicle provided in the embodiment of the present application includes the seat moving device in any of the above embodiments, so the two can solve the same technical problems and achieve the same technical effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] FIG1 is a schematic structural diagram of a vehicle provided in an embodiment of the present application;

[0045] FIG2 is a structural schematic diagram 1 of a seat provided in an embodiment of the present application;

[0046] FIG3 is a second structural diagram of a seat provided in an embodiment of the present application;

[0047] FIG4 is an exploded view of a seat provided in an embodiment of the present application;

[0048] FIG5 is a first structural diagram of a seat moving device provided in an embodiment of the present application;

[0049] FIG6 is a second structural diagram of the seat moving device provided in an embodiment of the present application;

[0050] FIG7 is a third structural diagram of a seat provided in an embodiment of the present application;

[0051] FIG8 is a fourth structural diagram of a seat provided in an embodiment of the present application;

[0052] FIG9 is a schematic structural diagram of a locking device in a seat moving device provided in an embodiment of the present application;

[0053] FIG10 is a third structural diagram of the seat moving device provided in an embodiment of the present application;

[0054] FIG11 is a cross-sectional view of a locking device in a seat moving device provided in an embodiment of the present application;

[0055] FIG12 is a flow chart of a method for controlling a seat moving device according to an embodiment of the present application;

[0056] FIG13 is a logic block diagram of a seat moving device control method provided in an embodiment of the present application.

[0057] Explanation of the accompanying drawings: 1: vehicle body; 2: vehicle front; 3: vehicle rear; 4: seat; 10: seat body; 20: seat moving device; 30: adjustment device; 40: lifting device; 100: vehicle; 101: backrest; 102: seat cushion; 103: headrest; 104: slide; 105: accommodating groove; 210: first moving device; 220: first rack; 230: gear mechanism; 231: first gear; 232: second gear; 240: base; 241: slide rail; 242: locking groove; 243: first groove wall; 244: second groove wall; 245: stopper; 246: Mounting frame; 247: Connecting plate; 248: Roller; 250: Second rack; 260: Locking device; 261: Base; 262: Locking rod; 2621: Locking block; 2622: First surface; 2623: Second surface; 2624: Limiting groove; 263: First elastic member; 264: Limiting device; 2642: Second elastic member; 2643: Second moving device; 2644: Limiting block; 2645: Positioning boss. DETAILED DESCRIPTION

[0058] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0059] In the following, the terms "first," "second," etc. are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the quantity of the technical features indicated. Therefore, a feature specified as "first," "second," etc. may explicitly or implicitly include one or more of the features.

[0060] In addition, in the embodiments of the present application, directional terms such as "up", "down", "left", "right", "horizontal" and "vertical" are defined relative to the orientation of the components in the drawings. It should be understood that these directional terms are relative concepts. They are used for relative description and clarification, and they can change accordingly according to changes in the orientation of the components in the drawings.

[0061] In the embodiments of the present application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, an electrical connection, a detachable connection, or an integrated connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0062] Referring to FIG1 , an embodiment of the present application provides a vehicle 100 , which can be a commercial vehicle or a passenger vehicle. Vehicle 100 includes a body 1 , a power system and wheels disposed on body 1 , the power system being in transmission connection with the wheels to drive the wheels and thereby provide power for vehicle 100 to travel.

[0063] In some embodiments, the power system may include a battery and a motor, the motor is electrically connected to the battery, and the motor is transmission-connected to the wheels. When driving, the battery powers the motor, which in turn drives the wheels to rotate; accordingly, the vehicle 100 is an electric car.

[0064] In other embodiments, the power system may include an internal combustion engine and a transmission, the transmission being in transmission connection with both the internal combustion engine and the wheels, and the internal combustion engine driving the wheels through the transmission; accordingly, the vehicle 100 may be a gasoline-powered vehicle. It is understood that the embodiments of the present application are not limited to the power system.

[0065] Referring to Figures 1 and 2, in the embodiment of the present application, a vehicle body 1 is configured as a cab, with the driver and the co-driver located in the cab. The vehicle 100 in the embodiment of the present application further includes a seat 4, which is disposed within the cab and connected to the vehicle body 1. For example, the seat 4 may include a driver's seat for the driver, or a co-driver's seat for the co-driver. For ease of description, the following description will use the driver's seat as an example. It is understood that the seat 4 may also be a co-driver's seat or other seat, and this embodiment of the present application does not limit this.

[0066] In some embodiments, the seat 4 may include a seat body 10, which includes a seat cushion 102 and a backrest 101. The seat cushion 102 is arranged approximately parallel to a horizontal plane, and the backrest 101 forms a certain angle with the horizontal plane. The backrest 101 and the seat cushion 102 are arranged along the longitudinal direction of the vehicle body 1, and the backrest 101 is located at an end of the seat cushion 102 near the rear end 3. The driver sits on the seat cushion 102 and can lean on the backrest 101. It will be understood that in this embodiment of the present application, the longitudinal direction of the vehicle body 1 can be the direction of travel of the vehicle 100 (such as a direction parallel to the X direction in Figure 1), and the rear end 3 and the front end 2 are respectively two opposite ends of the vehicle body 1 arranged in the longitudinal direction. The front end 2 is the front end of the vehicle body 1 when the vehicle is moving forward, and the rear end 3 is the rear end of the vehicle body 1 when the vehicle is moving forward.

[0067] As shown in Figure 2, the seat body 10 may further include a headrest 103, which is disposed on the top end of the backrest 101 and is connected to the backrest 101. When the driver sits on the seat 4, the driver's head can rest on the headrest 103 to improve the driver's riding comfort.

[0068] In some embodiments, the seat 4 further includes an adjustment device (not shown), wherein the backrest 101 and the seat cushion 102 are hingedly connected, and the adjustment device is connected to the backrest 101 and the seat cushion 102. The adjustment device is used to drive the backrest 101 to rotate relative to the seat cushion 102, thereby adjusting the angle between the backrest 101 and the seat cushion 102 to improve the driver's riding comfort. Exemplarily, the adjustment device may include a turbine, a worm, and a first adjustment motor. The turbine is connected to the backrest 101, and the worm is connected to the main shaft of the first adjustment motor. The worm cooperates with the turbine. During use, the first adjustment motor can drive the worm to rotate, thereby driving the turbine to rotate, thereby driving the backrest 101 to rotate relative to the seat cushion 102. Of course, in other implementations, the adjustment device may also include a first adjustment gear, a second adjustment gear and a second adjustment motor, the first adjustment gear being connected to the backrest 101, the second adjustment gear being connected to the main shaft transmission of the second adjustment motor, and the second adjustment gear being engaged with the first adjustment gear; when in use, the first adjustment gear is driven to rotate by the second adjustment motor, and then the second adjustment gear drives the backrest 101 to rotate relative to the seat cushion 102.

[0069] Continuing with reference to Figures 1 and 2, in some embodiments, the seat 4 further includes an adjustment device 30, which is connected to the seat cushion 102 and the vehicle body 1 to secure the seat 4 to the vehicle body 1. The adjustment device 30 can drive the seat 4 to move in the longitudinal direction of the vehicle body 1 to adjust the space between the seat 4 and the vehicle head 2, thereby further improving the driver's riding comfort. Exemplarily, the adjustment device 30 can include a slide, a slider, a first screw, a first nut, and a first adjustment motor. The slide can be connected to the vehicle body 1, the slider is slidably disposed within the slide, and the slide only allows the slider to slide in the longitudinal direction of the vehicle body 1. The slider and the first nut can both be connected to the seat cushion 102, the first screw cooperates with the first nut, and the main shaft of the first adjustment motor is in transmission connection with the first screw. During use, the first adjustment motor drives the first screw to rotate, thereby driving the seat 4 in the longitudinal direction of the vehicle body 1 through the first nut.

[0070] In the above implementation, the seat 4 may further include a lifting device 40, which is connected to the seat cushion 102 and the vehicle body 1. The lifting device 40 can drive the seat 4 to move in the vertical direction to adjust the height of the seat 4. Exemplarily, the lifting device 40 may include a first rod, a second rod, a second screw, a second nut, and a lifting motor. The top ends of the first rod and the second rod are both slidably connected to the seat cushion 102, the bottom ends of the first rod and the second rod are both slidably connected to the vehicle body 1, the second nut can be connected to the first rod, the second screw is rotatably connected to the second rod, the second screw cooperates with the second nut, and the main shaft of the lifting motor is transmission-connected to the second screw; when adjusting, the lifting motor drives the second screw to rotate, and then drives the first rod and the second rod to rotate relative to each other through the second nut to adjust the height of the seat 4.

[0071] In an implementation in which the seat 4 includes an adjustment device 30, the lifting device 40 can be arranged between the adjustment device 30 and the seat cushion 102. For example, the bottom ends of the first rod body and the second rod body can both be slidably connected to the slider, and the top ends of the first rod body and the second rod body can both be slidably connected to the seat cushion 102. When the first adjustment motor is working, it drives the seat 4 and the lifting device 40 to move along the longitudinal direction of the vehicle body 1.

[0072] 3 and 4 , in the embodiment of the present application, the seat 4 further includes a seat moving device 20. The seat moving device 20 may include a base 240, a gear mechanism 230, a first rack 220, and a first moving device 210. The gear mechanism 230 is disposed on the base 240 and may include a first gear 231 and a second gear 232 in a transmission connection. The first gear 231 and the second gear 232 are both rotatably connected to the base 240. In other words, the first gear 231 and the second gear 232 are both rotatable relative to the base 240. The first rack 220 is meshed with the first gear 231. The length direction of the first rack 220 is parallel to the longitudinal direction of the vehicle body 1 shown in FIG1 , and the length direction of the first rack 220 is parallel to the arrangement direction of the plurality of teeth on the first rack 220. The first moving device 210 is connected to the first rack 220 and is configured to drive the first rack 220 to move along the longitudinal direction of the vehicle body 1, thereby driving the first gear 231 and the second gear 232 to rotate.

[0073] In this embodiment of the present application, the seat movement device 20 further includes a second rack 250, which is connected to the seat body 10. The length of the second rack 250 is parallel to the longitudinal direction of the vehicle body 1, and the length of the second rack 250 is parallel to the arrangement direction of the multiple teeth on the second rack 250. The second rack 250 meshes with the second gear 232. When the first movement device 210 drives the first rack 220 to move in the longitudinal direction of the vehicle body 1, it drives the first gear 231 and the second gear 232 to rotate, thereby driving the seat body 10 to move in the longitudinal direction of the vehicle body 1 via the second rack 250. Exemplarily, the second rack 250 is connected to the seat body 10. In embodiments where the seat body 10 includes a seat cushion 102 and a backrest 101, the second rack 250 can be connected to the seat cushion 102.

[0074] In the above implementation, the gear mechanism 230 can make the moving speed of the second rack 250 greater than the moving speed of the first rack 220, so that when the first moving device 210 drives the first rack 220 to move along the length direction of the vehicle body 1, the second rack 250 can drive the seat body 10 to move quickly along the length direction of the vehicle body 1.

[0075] In some embodiments, the angular velocity of the first gear 231 may be different from the angular velocity of the second gear 232. For example, the angular velocity of the second gear 232 may be greater than the angular velocity of the first gear 231. Accordingly, the gear mechanism 230 may further include a first intermediate gear and a second intermediate gear (not shown). The first intermediate gear is coaxially disposed with the first gear 231 and is integral with the first gear 231. The second intermediate gear is coaxially disposed with the second gear 232 and is integral with the second gear 232. The second intermediate gear meshes with the first intermediate gear. The number of teeth of the second intermediate gear is smaller than that of the first intermediate gear, so that the angular velocity of the second gear 232 is greater than the angular velocity of the first gear 231, thereby causing the movement speed of the second rack 250 to be greater than the movement speed of the first rack 220. It will be understood that in the above implementation, the number of teeth of the first gear 231 and the second gear 232 can be equal or equal, as long as the movement speed of the second rack 250 is greater than the movement speed of the first rack 220.

[0076] Referring to Figure 5 , in some embodiments, the number of teeth on the first gear 231 can be smaller than the number of teeth on the second gear 232 , so that the second rack 250 moves faster than the first rack 220 . This allows the seat 4 shown in Figure 4 to move quickly under the drive of the first moving device 210 . Furthermore, a smaller number of teeth facilitates the design of a larger gear module and increases gear strength. This arrangement results in a simple structure and ease of manufacture.

[0077] In the above implementation, the angular velocity of the first gear 231 can be equal to the angular velocity of the second gear 232. This configuration can make the linear velocity of the second gear 232 greater than the linear velocity of the first gear 231, thereby increasing the speed of the gear mechanism.

[0078] Continuing to refer to Figures 4 and 5, in the above-mentioned implementation, the first gear 231 and the second gear 232 can be an integral structure, that is, the first gear 231 and the second gear 232 are coaxially arranged and are an integral structure; in this way, the integral structure formed by casting or forging simplifies the structure of the mobile device and reduces the difficulty of manufacturing and assembly. Exemplarily, a mounting bracket 246 can be provided on the base 240, and the first gear 231 and the second gear 232 are provided with an axial hole. The rotating shaft is passed through the axial hole and is connected to the mounting bracket 246 to achieve a rotatable connection between the first gear 231 and the second gear 232 and the base 240. It is understandable that a bearing can be provided between the rotating shaft and the axial hole to reduce the rotational resistance of the first gear 231 and the second gear 232.

[0079] In other implementations, the gear mechanism 230 may further include a transmission shaft, a first keyway and a second keyway are provided on the sidewall of the transmission shaft at intervals in the axial direction, a first shaft hole is provided on the first gear 231, a third keyway is provided on the sidewall of the first shaft hole, a second shaft hole is provided on the second gear 232, a fourth keyway is provided on the sidewall of the second shaft hole, the transmission shaft is passed through the first shaft hole and the second shaft hole, and a first flat key is provided in the first keyway and the third keyway, and a second flat key is provided in the second keyway and the fourth keyway; that is, the first gear 231 is connected to the transmission shaft via the first flat key, and the second gear 232 is connected to the transmission shaft via the second flat key, so as to realize a transmission connection between the second gear 232 and the second gear 232. Exemplarily, a mounting bracket 246 is provided on the base 240, and the transmission shaft can be rotatably connected to the mounting bracket 246 via a bearing.

[0080] Referring to Figure 6 , in some embodiments, a plurality of rollers 248 are rotatably mounted on a mounting frame 246. The plurality of rollers 248 are spaced apart along the longitudinal direction of the vehicle body 1 shown in Figure 1 , and the first rack 220 can be mounted on the plurality of rollers 248. In other words, the plurality of rollers 248 are used to support the first rack 220 so that the first rack 220 maintains engagement with the first gear 231. Because the rollers 248 are rotatably coupled to the mounting frame 246, the rollers 248 rotate when the first rack 220 moves, thereby reducing resistance to movement of the first rack 220.

[0081] Continuing with Figures 4 and 5 , in this embodiment of the present application, the seat moving device 20 further includes a locking device 260 connected to the seat body 10 and the base 240. When locked, the locking device 260 prevents the seat body 10 from moving toward the rear end 3 of the vehicle 1 as shown in Figure 1 . During normal driving of the vehicle 100, the locking device 260 prevents the seat body 10 from moving relative to the base 240 in the longitudinal direction of the vehicle body 1 . If the vehicle 100 is involved in a collision or is about to collide, the locking device 260 can unlock the seat body 10. Accordingly, the first moving device 210 can drive the first rack 220 to move, thereby rotating the first gear 231 and the second gear 232. This, via the second rack 250, drives the seat body 10 toward the rear end 3 , thereby increasing the distance between the driver and the front end 2 of the vehicle, thereby preventing the front end 2 from deforming into the cab during a collision and causing injury to the driver.

[0082] It is understood that by properly configuring the pulling direction of the first rack 220 exerted by the first moving device 210 and the gear mechanism 230, it is possible to ensure that when the first moving device 210 pulls the first rack 220, the second rack 250 can drive the seat 4 toward the rear end 3. In an embodiment in which the first gear 231 and the second gear 232 are integrally structured, the pulling force exerted by the first moving device 210 on the first rack 220 is directed toward the front end 2. In other words, the first moving device 210 drives the first rack 220 toward the front end 2, thereby driving the second rack 250 toward the rear end 3 via the first gear 231 and the second gear 232.

[0083] Illustratively, the first moving device 210 may include a first electromagnet, which may be disposed on the base 240. The iron core of the first electromagnet is configured to attract the first rack 220, thereby providing a pulling force to drive the first rack 220. By driving the first rack 220 to move via the first electromagnet, the first rack 220 can be driven to move rapidly in the event of a collision or an imminent collision. Furthermore, under the accelerating action of the gear mechanism 230, the second rack 250 and the seat 4 can be driven to move rapidly toward the rear of the vehicle 3 to prevent injury to the driver. Furthermore, the electromagnet's high instantaneous pulling force ensures sufficient pulling force while preventing the first moving device 210 from being excessively large.

[0084] It is understood that when the first electromagnet is energized, a large magnetic field is generated at the iron core to generate a magnetic force that attracts the first rack 220, thereby providing a pulling force for the movement of the first rack 220. The first rack 220 can be made of a ferromagnetic material such as a magnet, iron, or nickel, so that the first rack 220 can be attracted when the first electromagnet generates a magnetic field.

[0085] Of course, in other implementations, the first moving device 210 may also include a moving motor, with a drive gear disposed on its main shaft, which engages with the first rack 220. When a collision occurs or is about to occur, the moving motor drives the first rack 220 to move via the drive gear, and, under the accelerating action of the gear mechanism 230, drives the second rack 250 and the seat 4 to move rapidly toward the rear end 3 to prevent injury to the driver. The present embodiment of the present application does not impose any restrictions on the first moving device 210, as long as it can drive the first rack 220 to move when a collision occurs or is about to occur, so as to enable the seat 4 to move rapidly toward the rear end 3.

[0086] 4 and 5 , the seat moving device 20 provided in an embodiment of the present application has a base 240 connected to the vehicle body 1 shown in FIG1 , a gear mechanism 230 including a first gear 231 and a second gear 232 in transmission connection, the first gear 231 and the second gear 232 both being rotatably connected to the base 240, a first moving device 210 connected to the base 240 and the first rack 220, the first rack 220 meshing with the first gear 231; a second rack 250 connected to the seat body 10, the second rack 250 meshing with the second gear 232, the length directions of the first rack 220 and the second rack 250 being parallel to the longitudinal direction of the vehicle body 1, the first moving device 210 being used to drive the first rack 220 to move along its length direction so that the seat body 10 moves toward the rear end 3 driven by the second rack 250; a locking device 260 connected to both the base 240 and the seat body 10, and preventing the seat body 10 from moving toward the rear end 3 when locked. When the vehicle collides or is about to collide, the first moving device 210 drives the first rack 220 to move, and then drives the second rack 250 and the seat body 10 to move toward the rear end 3 through the gear mechanism 230 to increase the distance between the driver and the front end 2, thereby avoiding the collision causing the front end 2 to deform into the cab and contact the driver, thereby preventing the driver from being injured.

[0087] In addition, the gear mechanism 230 can make the moving speed of the second rack 250 greater than the moving speed of the first rack 220. When the first moving device 210 drives the first rack 220 to move, the second rack 250 can drive the seat body 10 to move quickly toward the rear end 3 of the vehicle under the speed-increasing action of the gear mechanism 230, so as to avoid the front end 2 from deforming into the cab too quickly and causing harm to the driver, thereby improving the safety of the vehicle.

[0088] As shown in FIG7 , in some implementations in which the seat 4 includes an adjustment device 30, the seat moving device 20 can be disposed between the adjustment device 30 and the vehicle body 1 shown in FIG1 . Accordingly, the base 240 is connected to the vehicle body 1, the second rack 250 can be connected to the slide of the adjustment device 30, and the first nut and the slider of the adjustment device 30 are both connected to the seat cushion 102; that is, the second rack 250 is connected to the seat cushion 102 via the adjustment device 30. When the vehicle collides or is about to collide, the first moving device 210 drives the first rack 220 to move, and the second rack 250 drives the seat 4 toward the rear end 3 via the adjustment device 30. When the vehicle is moving or stopped, the driver can adjust the distance between the seat 4 and the front end 2 via the adjustment device 30 to improve riding comfort. It can be understood that the seat moving device 20 drives the seat to move toward the rear end 3 of the vehicle at a faster speed, which can quickly increase the distance between the seat 4 and the front end 2 to prevent the driver from being injured by the deformed front end 2; while the adjustment device 30 drives the seat 4 to move along the longitudinal direction of the vehicle body 1 at a slower speed, so that the driver can adjust to a suitable position.

[0089] As shown in FIG8 , in another embodiment, the seat 4 includes an adjustment device 30. The adjustment device 30 can be disposed between the seat moving device 20 and the vehicle body 1 shown in FIG1 . Accordingly, the adjustment device 30 can be connected to both the base 240 and the vehicle body 1. For example, the slider and first nut of the adjustment device 30 can both be connected to the base 240, the slideway of the adjustment device 30 can be connected to the vehicle body 1, and the second rack 250 can be connected to the seat cushion 102. When the vehicle collides or is about to collide, the first moving device 210 drives the first rack 220 to move, and the second rack 250 drives the seat 4 toward the rear end 3 of the vehicle. When the vehicle is moving or stopped, the adjustment device 30 can drive the seat 4 to move along the longitudinal direction of the vehicle body 1 via the seat moving device 20 to adjust the distance between the seat 4 and the front end 2 of the vehicle.

[0090] In an embodiment in which the seat 4 includes a lifting device 40, the seat moving device 20 can be disposed between the lifting device 40 and the seat cushion 102. For example, the top ends of the first and second connecting rods of the lifting device 40 are both slidably connected to the base 240, and the second rack 250 is connected to the seat cushion 102. The adjustment device 30 can drive the seat 4 to move in the longitudinal direction of the vehicle body 1 via the lifting device 40 and the seat moving device 20 to adjust the distance between the seat 4 and the vehicle front 2. The lifting device 40 can drive the seat 4 to rise or fall via the seat moving device 20 to adjust the height of the seat 4.

[0091] Continuing with Figures 4 and 5 , in this embodiment of the present application, the base 240 may include a slide rail 241 parallel to the longitudinal direction of the vehicle body 1 shown in Figure 1 . The locking device 260 cooperates with the slide rail 241 to prevent the seat body 10 from moving toward the rear end 3 of the vehicle when locked. This arrangement provides a simple structure and is easy to manufacture. For example, a slide groove 104 may be provided at the bottom end of the seat cushion 102, and the slide rail 241 may be slidably disposed within the slide groove 104. The cooperation between the slide rail 241 and the slide groove 104 can improve the stability of the seat 4 and prevent the seat 4 from shaking.

[0092] In some embodiments, the slide rail 241 is provided with a locking groove 242. The locking groove 242 includes a first groove wall 243 and a second groove wall 244 arranged along the longitudinal direction of the vehicle body 1. The first groove wall 243 and the second groove wall 244 may both be inclined relative to the horizontal plane, and the second groove wall 244 is further away from the vehicle rear end 3 than the first groove wall 243. For example, the locking groove 242 may be provided on the top surface of the slide rail 241, with the first groove wall 243 and the second groove wall 244 extending away from the top surface. The ends of the first groove wall 243 and the second groove wall 244 away from the top surface may intersect. Of course, the first groove wall 243 and the ends of the groove wall away from the top surface may also be spaced apart. It is understood that the locking groove 242 may extend horizontally through the slide rail 241, or it may not extend horizontally through the slide rail 241, and this embodiment of the application is not limited thereto.

[0093] Referring to Figures 5 and 9 , in the above-described embodiment, the locking device 260 includes a base 261 and a locking rod 262. The base 261 is connected to the seat body 10 shown in Figure 4 , and the locking rod 262 is slidably connected to the base 261. A locking block 2621 is provided at the distal end (bottom end) of the locking rod 262. For example, the base 261 may be provided with a sliding hole, through which the locking rod 262 is inserted. The locking device 260 may also include a first elastic member 263 connected to both the base 261 and the locking block 2621. The first elastic member 263 is configured to move the locking block 2621 toward the locking groove 242 so that the locking block 2621 contacts the first groove wall 243. The first elastic member 263 may include a first coil spring, which may be sleeved on the locking rod 262, with one end of the first coil spring abutting against the base 261 and the other end of the first coil spring abutting against the locking block 2621. Under the elastic force of the first coil spring, the locking rod 262 moves toward the slide rail 241, so that the locking block 2621 enters the locking groove 242 and contacts the first groove wall 243. Of course, the first elastic member 263 may also include a first elastic sheet, with one end of the first elastic sheet abutting against the base 261 and the other end of the first elastic sheet abutting against the locking block 2621. Under the elastic force of the first elastic sheet, the locking rod 262 moves toward the slide rail 241. The embodiment of the present application does not limit the first elastic member 263.

[0094] 9 , in the embodiment of the present application, the locking device 260 further includes a limiting device 264 disposed on the base 261. The limiting device 264 is configured to connect to the locking rod 262 in the locked state to prevent the locking rod 262 from sliding relative to the base 261. Specifically, in the locked state, the locking block 2621 contacts the first groove wall 243, and the limiting device 264 prevents the locking rod 262 from sliding relative to the base 261. In this state, the locking device 260 prevents the seat body 10 from moving toward the rear end 3 of the vehicle. In the unlocked state, the limiting device 264 releases the locking rod 262. When the first moving device 210 shown in FIG. 4 drives the seat body 10 toward the rear end 3 shown in FIG. 1 , sliding occurs between the first groove wall 243 and the locking block 2621, causing the locking block 2621 to slide out of the locking groove 242, thereby allowing the seat 4 to move toward the rear end 3 and unlocking the seat body 10.

[0095] It can be understood that in the above-mentioned implementation, the inclination angle of the first groove wall 243 is smaller than the friction angle between the contact surface of the locking block 2621 and the first groove wall 243, thereby avoiding self-locking between the locking block 2621 and the first groove wall 243, so that when the first moving device 210 drives the seat body 10 to move toward the rear end 3 of the vehicle, sliding can occur between the first groove wall 243 and the locking block 2621, causing the locking block 2621 to slide out of the locking groove 242.

[0096] Referring to Figures 9 and 10 , in some embodiments, the locking block 2621 includes a first surface 2622 and a second surface 2623. In the locked state, the first surface 2622 contacts the first groove wall 243, and the second surface 2623 contacts the second groove wall 244. The inclination angle of the second groove wall 244 is greater than the friction angle between the second surface 2623 and the second groove wall 244. This arrangement allows the locking block 2621 and the second groove wall 244 to self-lock. In either the unlocked or locked state, the locking device 260 prevents the seat 4 from moving toward the front 2 of the vehicle as shown in Figure 1 , thereby preventing the seat 4 from moving toward the front 2 during normal vehicle operation.

[0097] In the above implementation, there can be multiple locking slots 242, each of which is arranged along the longitudinal direction of the vehicle body 1. For example, the multiple locking slots 242 can be arranged sequentially along the longitudinal direction of the vehicle body 1, and the top of the first slot wall 243 of the preceding locking slot 242 can contact the top of the second slot wall 244 of the following locking slot 242. Of course, the multiple locking slots 242 can also be arranged at intervals along the longitudinal direction of the vehicle body 1, which is not limited in this embodiment of the present application. With this arrangement, by positioning the locking block 2621 in different locking slots 242 when in the locked state, the distance between the seat 4 and the front end 2 can be further adjusted, thereby increasing the adjustment range of the distance between the seat 4 and the front end 2.

[0098] It can be understood that when the limiting device 264 releases the locking rod 262, that is, the locking device 260 is in the unlocked state, the first moving device 210 drives the seat body 10 to move toward the rear end 3 of the vehicle, and the locking block 2621 slides into each locking groove 242 in turn from the front end 2 to the rear end 3 of the vehicle under the elastic force of the first elastic member 263.

[0099] In the above implementation, a receiving cavity may be provided in the base 261 , and the limiting device 264 may be provided in the receiving cavity to prevent the limiting device 264 from occupying external space, thereby improving the structural compactness of the seat moving device 20 .

[0100] 9 and 11 , in some embodiments, the limiting device 264 includes a limiting block 2644 and a second elastic member 2642. A limiting slot 2624 is provided on the locking rod 262. The second elastic member 2642 is connected to both the limiting block 2644 and the base 261. The second elastic member 2642 is configured to drive the limiting block 2644 to move toward the locking rod 262 in a direction perpendicular to the axis of the locking rod 262, thereby causing the limiting block 2644 to be retained within the limiting slot 2624 in the locked state. The limiting device 264 also includes a positioning boss 2645, which abuts against a side of the limiting block 2644 away from the locking block 2621 and is slidably connected to the limiting block 2644. In the locked state, the second elastic member 2642 drives the limiting block 2644 to be engaged in the limiting groove 2624. At this time, the positioning boss 2645 prevents the locking rod 262 from sliding relative to the base 261 via the limiting block 2644. The limiting device 264 also includes a second moving device 2643, which is connected to the limiting block 2644 and the base 261. When the locking state is released, the second moving device 2643 can drive the limiting block 2644 to move away from the locking rod 262, thereby causing the limiting block 2644 to slide out of the limiting groove 2624 to release the locking rod 262. In other implementations, the base 261 can be provided with a sliding hole, and the limiting block 2644 can be slidably disposed in the sliding hole, so that when the limiting block 2644 is engaged in the limiting groove 2624, the locking rod 262 is locked.

[0101] Through the above-mentioned arrangement, in the locked state, the second elastic member 2642 can keep the limit block 2644 in the limit groove 2624 to prevent the locking rod 262 from moving, thereby achieving locking; when unlocking, the second moving device 2643 drives the limit block 2644 to move in the direction away from the locking rod 262, so that the limit block 2644 slides out of the limit groove 2624, releasing the locking rod 262, thereby achieving unlocking; the unlocking speed can be increased, so that the seat 4 shown in Figure 4 can quickly move toward the rear end 3 shown in Figure 1, further improving the safety of the vehicle.

[0102] Exemplarily, the second moving device 2643 may include a second electromagnet disposed on the base 261, and the iron core of the second electromagnet is used to attract the limit block 2644, so that when the second electromagnet is energized, the limit block 2644 is driven to move in a direction away from the locking rod 262. Of course, the second moving device 2643 may also include an electric push rod disposed on the base 261, the push rod of the electric push rod being connected to the limit block 2644, and when the lock is released, the electric push rod drives the limit block 2644 to move in a direction away from the locking rod 262. The embodiment of the present application does not impose any restrictions on the second moving device 2643, as long as it can drive the limit block 2644 to move in a direction away from the locking rod 262 when the lock is released, thereby releasing the locking rod 262.

[0103] It is understood that when the second electromagnet is energized, a larger magnetic field is generated at the iron core to generate a magnetic force that attracts the limit block 2644, thereby driving the limit block 2644 to move. The material of the limit block 2644 can include ferromagnetic materials such as magnets, iron, and nickel, so that the limit block 2644 can be attracted when the second electromagnet generates a magnetic field.

[0104] In the above implementation, the second elastic member 2642 may include a second coil spring, one end of which is connected to the base 261, and the other end of which is connected to the limit block 2644, and the second coil spring is in a compressed state. In his implementation, the second elastic member 2642 may also include a second elastic sheet, one end of which is connected to the base 261, and the other end of which may be connected to the limit block 2644. The elastic force of the second elastic sheet can drive the limit block 2644 to move toward the locking rod 262 and keep the limit block 2644 in the limit groove 2624. The embodiment of the present application does not impose any restrictions on the second elastic member 2642, as long as it can drive the limit block 2644 to move toward the locking rod 262 and keep the limit block 2644 in the limit groove 2624 through its own elastic force.

[0105] In other embodiments, the limiting device 264 includes a limiting block 2644 and a second elastic member 2642. The locking rod 262 is provided with a limiting slot 2624. The second elastic member 2642 is connected to the limiting block 2644 and the base 261, and is used to drive the limiting block 2644 to move away from the locking rod 262. The limiting device 264 also includes a second moving device 2643. The second moving device 2643 is disposed on the base 261 and connected to the limiting block 2644. The second moving device 2643 is used to drive the limiting block 2644 to move toward the locking rod 262 in the locked state, so that the limiting block 2644 is locked in the limiting slot 2624 in the locked state.

[0106] With the above arrangement, in the locked state, the second moving device 2643 drives the limiting block 2644 to move toward the locking rod 262, so that the limiting block 2644 remains in the limiting groove 2624, thereby preventing the locking rod 262 from moving. The driving force driving the limiting block 2644 toward the locking rod 262 is relatively large, thereby preventing the limiting block 2644 from disengaging from the limiting groove 2624 and causing a mis-lock. Accordingly, in the unlocked state, the second moving device 2643 can cancel the driving force on the limiting block 2644. At the same time, the second elastic member 2642 drives the limiting block 2644 to move away from the locking rod 262 through its own elastic force, and the limiting block 2644 slides out of the limiting groove 2624, thereby releasing the locking rod 262 and thereby unlocking the door.

[0107] Exemplarily, the second moving device 2643 may include a second electromagnet, which is disposed on the base 261, and the iron core of the second electromagnet is used to attract the limit block 2644, so that when the second electromagnet is energized, the limit block 2644 is driven to move toward the locking rod 262 to achieve locking. Of course, the second moving device 2643 may also include an electric push rod, which is disposed on the base 261, and the push rod of the electric push rod is connected to the limit block 2644. When locking, the electric push rod drives the limit block 2644 to move toward the locking rod 262. The embodiment of the present application does not limit the second moving device 2643, as long as it can drive the limit block 2644 to move toward the locking rod 262 when locking, thereby keeping the limit block 2644 in the limit groove 2624. It can be understood that in the locked state, the second moving device 2643 can always be energized. When unlocked, the second moving device 2643 is not energized, and then under the elastic force of the second elastic member 2642, the limit block 2644 is driven to move in the direction away from the locking rod 262, and the limit block 2644 slides out of the limit groove 2624 to release the locking rod 262.

[0108] It is understood that when the second electromagnet is energized, a larger magnetic field is generated at the iron core to generate a magnetic force that attracts the limit block 2644, thereby driving the limit block 2644 to move. The material of the limit block 2644 can include ferromagnetic materials such as magnets, iron, and nickel, so that the limit block 2644 can be attracted when the second electromagnet generates a magnetic field.

[0109] In the above implementation, the second elastic member 2642 may include a second coil spring, one end of which is connected to the base 261, and the other end of which is connected to the limit block 2644. When in the locked state, the second coil spring is in a stretched state. In his implementation, the second elastic member 2642 may also include a second elastic sheet, one end of which is connected to the base 261, and the other end of which is connected to the limit block 2644. The elastic force of the second elastic sheet can drive the limit block 2644 to move away from the locking rod 262. The embodiment of the present application does not impose any restrictions on the second elastic member 2642, as long as it can drive the limit block 2644 to move away from the locking rod 262 through its own elastic force and cause the limit block 2644 to slide out of the limit slot 2624.

[0110] Continuing with Figures 5 and 6 , in the above embodiment, the locking groove 242 is provided on a predetermined surface of the slide rail 241. A first stop 245 is provided on the predetermined surface. The first stop 245 is located on the side of the locking groove 242 that faces the rear end 3 shown in Figure 1 . The first stop 245 is configured to prevent the locking block 2621 from moving toward the rear end 3. This arrangement prevents the seat 4 shown in Figure 4 from moving excessively toward the rear end 3, thereby preventing the seat 4 from separating from the slide rail 241.

[0111] It is understood that in the embodiment in which the locking groove 242 is provided on the top surface of the slide rail 241, the predetermined surface is the top surface of the slide rail 241. The first stop portion 245 may include a protrusion located on the top surface, with a certain distance between the protrusion and the top surface to ensure that after the locking block 2621 contacts the first stop portion 245, even if the locking block 2621 moves to the extreme position away from the slide rail 241, it is difficult to pass over the first stop portion 245. For example, the protrusion can be an integral structure with the slide rail 241 to reduce manufacturing difficulty; of course, the protrusion can also be connected to the slide rail 241 by welding or bolting, and the embodiment of the present application does not limit the method of connection between the protrusion and the slide rail 241.

[0112] In the above embodiment, the bottom of the chute 104 shown in Figure 4 is provided with a receiving groove, and the locking device 260 can be arranged in the receiving groove. Such an arrangement can improve the structural compactness of the seat 4 to avoid occupying space in the cab.

[0113] Continuing with reference to Figures 4 and 5, in some embodiments, there may be two slide rails 241, which are arranged parallel and spaced apart, and are located in the same horizontal plane. Accordingly, the seat cushion 102 may be provided with two slide grooves 104, with each slide rail 241 slidingly disposed within one of the slide grooves 104, to further enhance the stability of the seat 4. For example, a locking groove 242 is provided on the top surface of each slide rail 241, and correspondingly, a receiving groove 105 is provided at the bottom of each slide groove 104, with a locking device 260 disposed within each receiving groove 105. With this arrangement, the two locking devices 260 can further enhance the stability of the seat 4.

[0114] In the above implementation, a connecting plate 247 is provided between the two slide rails 241 , and the connecting plate 247 is connected to both slide rails 241 ; the mounting frame 246 and the first moving device 210 can both be provided on the connecting plate 247 .

[0115] In some embodiments, the slide rail 241 may be provided with a locking hole, the centerline of which is perpendicular to the length of the slide rail 241 and parallel to the horizontal plane. The corresponding locking device 260 may include a locking rod and a third electromagnet. The locking rod is slidably disposed on the seat cushion 102, and the third electromagnet is disposed on the seat cushion 102, and the iron core of the third electromagnet is used to attract the locking rod. In the locked state, the locking rod is inserted into the locking hole, thereby preventing the seat 4 from moving along the longitudinal direction of the vehicle body 1 relative to the base 240. In the unlocked state, the electromagnet is energized, thereby driving the locking rod to retract from the locking hole, allowing the seat 4 to move toward the rear end 3 under the drive of the first moving device 210 to increase the distance between the seat 4 and the front end 2.

[0116] In the embodiment of the present application, the thrust for driving the seat body 10 to move toward the rear end 3 satisfies: F0 = amg + (bg + 0.8g) m

[0117] Among them, F0 is the thrust driving the seat body 10 to move toward the rear end 3 of the vehicle, m is the total mass of the seat body 10 and the driver, g is the acceleration of gravity, a is the friction coefficient between the slide rail 241 and the slide groove 104, b is the maximum braking deceleration, and 0.8g is the acceleration when the seat 4 moves backward.

[0118] Exemplarily, the total mass m of the seat body 10 and the driver is approximately 100 kg (of which the driver is approximately 75 kg and the seat body 10 is approximately 25 kg). The friction coefficient between the slide rail 241 and the slide groove 104 is 0.01-0.02. Due to factors such as actual installation errors, the friction coefficient may be much larger than the theoretical value. Here, the friction coefficient a can be taken as 0.2. When the vehicle brakes, the longitudinal force of the vehicle is less than the maximum friction force of the road surface. Therefore, the maximum braking deceleration determined by the adhesion coefficient under high adhesion road surface (about 0.8) is 0.8 g. After calculation, F0=1764N. Since the acceleration and maximum braking deceleration when the seat 4 moves backward are both upper limit values, the calculated F0 is large enough to drive the seat 4 to move quickly toward the rear end 3 of the vehicle.

[0119] In an implementation where the first moving device 210 includes a first electromagnet, the magnetic force of the first electromagnet when energized satisfies: E =[(NI) 2 μ0S] / (2σ 2 )

[0120] Among them, F E is the magnetic force of the first electromagnet when it is charged, N is the number of turns of the first electromagnet coil, I is the current of the first electromagnet, μ0 is the magnetic permeability of the first electromagnet, and μ0 can be taken as 4π10 -7 , where π is the circumference of a circle, S is the cross-sectional area of ​​the magnetic circuit, and σ is the air gap travel.

[0121] From the force balance, we know that F0i=F E , that is, F0i=[(NI) 2 μ0S] / (2σ 2 ), where i is the transmission ratio of the gear mechanism 230. Assuming the first gear 231 and the second gear 232 are integrally structured, and the transmission ratio of the two-pole speed-increasing mechanism formed by the first gear 231 and the second gear 232 is 5, and the distance the seat 4 moves toward the rear end 3 is L = 0.1m, σ = L / i = 0.02m. Assuming the radius of the first electromagnet is R = 0.07m, the corresponding magnetic circuit cross-sectional area S = πR 2 =0.0154m 2 ; Substitute the above values ​​into F0i=[(NI) 2 μ0S] / (2σ 2 ), it can be calculated that NI = 19099, when I = 20A, N ≈ 955 turns.

[0122] Referring to FIG. 12 , an embodiment of the present application further provides a seat moving device control method, which can be used for the seat moving device in the above embodiment. The method includes:

[0123] S101: Acquire vehicle driving data.

[0124] Exemplarily, the vehicle's driving data includes: current vehicle speed, vehicle deceleration, brake pedal opening, and vehicle distance. Accordingly, the on-board computer (ECU) can obtain the vehicle's driving data through detection equipment installed on the vehicle. For example, the detection equipment can include a laser radar, millimeter-wave radar, camera (such as a front camera), etc. installed on the vehicle to obtain driving data such as current vehicle speed, vehicle deceleration, and vehicle distance. The detection equipment can also include a device capable of detecting the brake pedal opening to detect the brake pedal opening, that is, to obtain braking force data. Of course, the on-board computer can also obtain the brake pedal opening through the vehicle's controller area network bus (Controller Area Network for short CAN) to obtain braking force data.

[0125] In the above implementation, driving data is obtained through the vehicle's existing sensors, radars, cameras and other detection equipment, without the need to set up additional detection equipment to detect driving data, which simplifies the vehicle's structure and reduces the vehicle's production cost.

[0126] After obtaining the vehicle driving data, the method further includes:

[0127] S102: Analyze the driving data to form a collision judgment result.

[0128] Referring to FIG13 , the driving data is analyzed to obtain a collision determination result, including: obtaining the time-to-collision (TTC) between the vehicle and the preceding vehicle, the operating status of the autonomous emergency braking system (AEB) (e.g., the automatic braking signal), and the vehicle's deceleration based on the driving data; if the TTC is less than a set value, the AEB is engaged, and the vehicle's deceleration reaches an upper limit, the collision determination result is "yes," indicating that the vehicle is about to collide. If the TTC is greater than or equal to the set value, and / or the AEB is not engaged, and / or the vehicle's deceleration does not reach the upper limit, the collision determination result is "no," indicating that the vehicle will not collide.

[0129] Through the above settings, whether the vehicle is about to collide is comprehensively judged based on the collision time, emergency braking situation and vehicle deceleration, which improves the accuracy of the judgment and thus improves the safety of the vehicle.

[0130] It is understandable that the set value and upper limit value can be reasonably set according to actual usage conditions to ensure that the judgment result has a high accuracy.

[0131] After forming the collision judgment result, the method further includes:

[0132] S103: When the collision judgment result is yes, the locking device is controlled to unlock the seat body, and the first moving device is controlled to drive the first rack to move.

[0133] As shown in Figures 4 and 5, in the implementation method in which the first moving device 210 includes a first electromagnet and the second moving device 2643 in the locking device 260 includes a second electromagnet, when the collision judgment result is yes, the on-board computer sends an enable signal, and then supplies power to the first electromagnet and the second electromagnet, so that the locking device 260 releases the lock on the seat body 10. At the same time, the first electromagnet drives the seat body 10 to move toward the rear end 3 of the vehicle through the first rack 220, the gear mechanism 230 and the second rack 250 to increase the distance between the seat 4 and the front end 2 to prevent the driver from being injured by the deformed front end 2.

[0134] In some embodiments, as shown in FIG13 , the seat movement device control method further includes receiving an airbag triggering signal. Upon receiving the airbag triggering signal, the locking device 260 (shown in FIG4 and FIG5 ) is controlled to unlock the seat body 10, and the first movement device 210 is controlled to drive the first rack 220 to move. In other words, when the airbag deploys, the onboard computer controls the locking device 260 to unlock the seat body 10 and controls the first movement device 210 to drive the seat body 10 toward the rear of the vehicle 3 to prevent the driver from being injured, further improving vehicle safety.

[0135] It can be understood that even if the collision time is greater than or equal to the first set value, and / or the automatic emergency braking system is not working, and / or the vehicle deceleration has not reached the upper limit value, if the on-board host obtains the airbag trigger signal and determines that the collision judgment result is yes, the locking device 260 is immediately controlled to release the lock on the seat body 10, and the first moving device 210 is controlled to drive the seat 4 to move toward the rear end 3 of the vehicle.

[0136] The seat movement device control method provided in the embodiments of the present application analyzes driving data to form a collision determination result. If the collision determination result is positive, the locking device is controlled to unlock the seat body and the first movement device 210 is controlled to drive the first rack 220 to move. Specifically, if the vehicle is involved in a collision or is about to be involved in a collision, the first movement device 210 drives the first rack 220 to move, which in turn drives the second rack 250 and the seat body 10 toward the rear end 3 of the vehicle via the gear mechanism 230, thereby increasing the distance between the driver and the front end 2 of the vehicle. This prevents the front end from deforming into the cab and contacting the driver during a collision, thereby preventing injury to the driver.

[0137] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0138] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A seat moving device, characterized in that: include: A base, the base being used to be connected to the vehicle body; A gear mechanism, the gear mechanism comprising a first gear and a second gear in transmission connection, the first gear and the second gear being rotatably connected to the base; a first moving device and a first rack connected to the first moving device, the first moving device is connected to the base, and the first rack is meshed with the first gear; a second rack, the second rack being connected to the seat body, the second rack being meshed with the second gear, the length directions of the first rack and the second rack being parallel to the longitudinal direction of the vehicle body; the first moving device being used to drive the first rack to move along its length direction so that the seat body moves along the longitudinal direction of the vehicle body; the gear mechanism being used to make the moving speed of the second rack greater than the moving speed of the first rack; A locking device is connected to the base and the seat body, and is used to prevent the seat body from moving in a locked state.

2. The seat moving device according to claim 1, characterized in that: The number of teeth of the first gear is smaller than the number of teeth of the second gear.

3. The seat moving device according to claim 1 or 2, characterized in that: The angular velocities of the first gear and the second gear are equal.

4. The seat moving device according to any one of claims 1 to 3, characterized in that: The first gear and the second gear are an integrated structure.

5. The seat moving device according to any one of claims 1 to 4, characterized in that: The first moving device includes a first electromagnet, and the iron core of the first electromagnet is used to attract the first rack.

6. The seat moving device according to any one of claims 1 to 5, characterized in that: The base comprises a slide rail which is parallel to the longitudinal direction of the vehicle body and is used to cooperate with the locking device to prevent the seat body from moving in a locked state.

7. The seat moving device according to claim 6, characterized in that: The slide rail is provided with a locking groove, the locking groove comprising a first groove wall and a second groove wall arranged along the longitudinal direction of the vehicle body, and along the longitudinal direction of the vehicle body, the second groove wall is farther away from the rear of the vehicle than the first groove wall; The locking device comprises: A base, the base being used to be connected to the seat body; A locking rod, the locking rod is slidably connected to the base, and a locking block is provided at the end of the locking rod; a first elastic member, the first elastic member being connected to both the base and the locking block, the first elastic member being used to move the locking block toward the locking groove so that the locking block contacts the first groove wall; the inclination angle of the first groove wall being smaller than the friction angle of the contact surface between the locking block and the first groove wall; A limiting device is arranged on the base, and is used to be connected with the locking rod in the locked state to prevent the locking rod from sliding relative to the base.

8. The seat moving device according to claim 7, characterized in that: The locking block includes a first surface and a second surface. In the locked state, the first surface contacts the first groove wall, and the second surface contacts the second groove wall. The inclination angle of the second groove wall is greater than the friction angle between the second surface and the contact surface of the second groove wall.

9. The seat moving device according to claim 7 or 8, characterized in that: There are a plurality of locking grooves, and the plurality of locking grooves are arranged along the longitudinal direction of the vehicle body.

10. The seat moving device according to any one of claims 7 to 9, characterized in that: The limiting device comprises: Limit block; a second elastic member, the second elastic member being connected to the limit block and the base, and the second elastic member being used for driving the limit block to move toward the locking rod, so that the limit block is clamped in the limit groove on the locking rod in the locked state; The second moving device is arranged on the base, the second moving device is connected to the limit block, and the second moving device is used for driving the limit block to move in a direction away from the locking rod when the locking state is released.

11. The seat moving device according to any one of claims 7 to 9, characterized in that: The limiting device comprises: Limit block; a second elastic member, the second elastic member being connected to the limit block and the base, and the elastic member being used for driving the limit block to move in a direction away from the locking rod; The second moving device is connected to the limit block, and the second moving device is used to drive the limit block to move toward the locking rod in the locked state, so that the limit block is stuck in the limit groove on the locking rod in the locked state.

12. The seat moving device according to claim 10 or 11, characterized in that: The second moving device includes a second electromagnet, and the iron core of the second electromagnet is used to attract the limiting block.

13. The seat moving device according to any one of claims 7 to 12, characterized in that: The locking groove is arranged on a preset surface of the slide rail, a first stop portion is arranged on the preset surface, the first stop portion is located at one side of the locking groove, and the first stop portion is used to prevent the locking block from moving.

14. A seat moving device control method, characterized in that: For the seat moving device according to any one of claims 1 to 12, the control method of the seat moving device comprises: Obtain vehicle driving data; Analyzing the driving data to form a collision judgment result; When the collision determination result is yes, the locking device is controlled to release the lock on the seat body, and the first moving device is controlled to drive the first rack to move.

15. The seat moving device control method according to claim 14, characterized in that: Analyzing the driving data to obtain a collision judgment result includes: obtaining the vehicle's collision time, the working status of the automatic emergency braking system, and the vehicle's deceleration based on the driving data; when the collision time is less than a set value, the automatic emergency braking system is working, and the vehicle's deceleration reaches an upper limit value, the collision judgment result is yes.

16. The seat moving device control method according to claim 15, characterized in that: The driving data of the vehicle obtained includes: current vehicle speed, vehicle deceleration, brake pedal opening, and vehicle distance.

17. The seat moving device control method according to any one of claims 14 to 16, characterized in that: The seat moving device control method further includes: receiving an airbag triggering signal, and when the airbag triggering signal is obtained, controlling the locking device to unlock the seat body, and controlling the first moving device to drive the first rack to move.

18. A seat, characterized in that: include: A seat body and the seat moving device according to any one of claims 1 to 12, wherein the seat body is connected to the seat moving device.

19. The seat according to claim 18, characterized in that The seat body comprises a seat cushion and a backrest connected to the seat cushion, and the seat moving device is connected to the seat cushion.

20. The seat according to claim 19, characterized in that The seat further comprises an adjusting device, the adjusting device being connected to the base and the vehicle body, and the adjusting device being used to drive the seat cushion to move along the longitudinal direction of the vehicle body; Alternatively, the second rack is connected to the seat cushion via the adjusting device, and the adjusting device is used to drive the seat cushion to move along the longitudinal direction of the vehicle body.

21. A vehicle, characterized in that: include: A vehicle body and a seat as described in any one of claims 18 to 20, wherein the seat is arranged on the vehicle body.

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