Automobile electric four-way seat cushion assembly with anti-collision structure

Abstract

The application discloses a car electric four-way seat cushion assembly with an anti-collision structure and belongs to the technical field of car seats. The application comprises a sliding frame, a bracket arranged on the sliding frame, the sliding frame being slidingly arranged on a base, a connecting block arranged on the sliding frame, a guide rod penetrating the connecting block in the length direction of the base, a gear slot arranged on the upper surface of the guide rod, a gear meshing connected to the upper end of the gear slot, a second telescopic structure arranged on each side of the gear along the axial direction of the gear, a pressing block arranged on the telescopic end of the second telescopic structure towards the gear slot, and an adaptive slot arranged on the outer surface of the pressing block and connected to the gear slot. The anti-collision structure is formed by the pressing block and the gear slot, which prevents the sliding frame from producing unexpected displacement under impact load, improves the anti-collision safety of the seat cushion assembly, and solves the problem that the gear is out of step or slips due to the position fixation by the self-locking characteristics after meshing in the prior art.

Description

Technical Field

[0001] This invention relates to the field of automotive seat technology, specifically to an electric four-way seat cushion assembly for automobiles with an anti-collision structure. Background Technology

[0002] The automotive electric four-way seat cushion assembly is an integrated adjustment component installed on the car seat cushion. Its core function is to realize the electric adjustment of the seat cushion in four directions through motor drive. These four directions usually refer to the combination of the seat cushion's horizontal sliding back and forth and vertical lifting. By operating the switch, the driver and passengers can easily adjust the seat cushion to a comfortable position according to their own body shape and sitting posture preferences, thereby effectively improving leg support and riding comfort.

[0003] Chinese patent CN219749572U discloses an automatic rear seat for automobiles, including a seat cushion, a backrest mounted on the seat cushion, and two lower guide rails fixed to the bottom of the vehicle body. The backrest is rotatable and mounted on the seat cushion. This application relates to an automatic rear seat for automobiles, which uses a dual-axis motor to simultaneously drive two gears. The gears mesh with a rack, and the rotation of the gears causes the seat cushion to slide back and forth along the lower guide rails. The seat cushion and the backrest are rotatably connected. The backrest can be adjusted to the desired angle by adjusting the seat cushion back and forth. One end of the limiting bracket is connected and fixed to the vehicle body through a mounting hole and fastener. The other end of the limiting bracket has a limiting screw fixed to the side of the backrest in an inclined guide groove. The limiting screw moves in the inclined guide groove, allowing the backrest to move within a fixed range, which can better restrict the seat.

[0004] Chinese patent CN223949018U discloses a rear end lifting mechanism for an automotive seat cushion, including a seat frame, a rotating plate rotatably mounted at the rear end of the seat frame, and a drive assembly for driving the rotating plate to rotate. A lifting rod extending along the width direction of the seat cushion is mounted on the rotating plate. The drive assembly includes a push rod motor, with both ends of the push rod motor hinged to the seat frame and the rotating plate, respectively. In this application, the rotating plate is driven to rotate by the push rod motor, thereby causing the position of the lifting rod to change. This can achieve precise lifting of the rear end of the seat cushion, compensating for the height difference between the seat cushion and the backrest. Moreover, the rotation lever arm is short, resulting in good stability of the seat cushion after lifting and improving the comfort of the user when lying down.

[0005] However, the existing technologies still have the following shortcomings. In terms of seat position locking, the existing solutions mainly rely on the self-locking characteristics after engagement to fix the position. This single locking method can be maintained under normal use, but when the vehicle is involved in a collision, especially a frontal or side impact, it can cause the gears to skip teeth or slip, which can directly or even threaten the safety of the occupants. Secondly, the engagement connection method will generate engagement noise due to the gradual wear or uneven distribution of lubricant during long-term use, which will affect the ride comfort. Summary of the Invention

[0006] The purpose of this invention is to provide an electric four-way car seat assembly with an anti-collision structure. During normal use, the pressure block engages with the toothed groove to form an auxiliary fixation. In the event of a collision, it acts as a mechanical locking structure independent of gear meshing, providing additional anti-shear locking force. This effectively prevents the sliding frame from undergoing unexpected displacement under impact load, thus improving the anti-collision safety of the seat assembly. On the other hand, by setting up a sound sensor to monitor meshing noise in real time and combining it with on-demand oil lubrication, lubrication is achieved, thereby reducing meshing noise and improving riding comfort.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an electric four-way seat cushion assembly for automobiles with an anti-collision structure, comprising a sliding frame, a bracket provided on the sliding frame, the sliding frame being slidably mounted on a base, a connecting block provided on the sliding frame, a guide rod passing through the connecting block along the length direction of the base, a toothed groove provided on the upper surface of the guide rod, a gear meshing with the upper end of the toothed groove, a second telescopic structure provided on each side of the gear along its axial direction, a pressure block provided at the telescopic end of the second telescopic structure facing the toothed groove, and an adapter groove provided on the outer surface of the pressure block for connecting with the toothed groove.

[0008] Preferably, the side of the pressure block near the adapter groove is recessed with an immersion chamber. The pressure block is connected to the liquid outlet of the pump set on the connecting block through a transmission pipe. After the pressure block is pushed by the second telescopic structure to the adapter groove and engage with the tooth groove, the lubricating liquid is injected into the immersion chamber through the transmission pipe and continuously contacts the tooth groove.

[0009] Preferably, the side of the pressure block away from the adapter groove is provided with a vent hole, which is connected to the soaking chamber, and the position of the vent hole is higher than the level of the lubricating liquid in the soaking chamber.

[0010] Preferably, the connecting block has a movable cavity in the middle, the gear is located in the movable cavity, and there are mounting cavities on both sides of the movable cavity. The fixed end of the second telescopic structure is fixed in the mounting cavity.

[0011] Preferably, the sidewall of the mounting cavity has a buffer cavity, and at least a portion of the transmission pipe is a flexible pipe, so that the transmission pipe can be temporarily stored in the buffer cavity when the second telescopic structure causes the pressure block to contract.

[0012] Preferably, the upper end of the connecting block is provided with a pump and a storage chamber, the liquid outlet of the storage chamber is connected to the liquid inlet of the pump, the liquid outlet of the pump is sealed to the transmission pipe, and the storage chamber stores lubricating fluid.

[0013] Preferably, the sliding frame is equipped with a dual-output shaft motor, and the output shafts at both ends of the dual-output shaft motor are respectively connected to the corresponding gear transmissions via connecting shafts.

[0014] Preferably, the bracket is rotatably connected to the sliding frame via a second rotating shaft, and a first telescopic structure is also provided between the sliding frame and the bracket. The telescopic end of the first telescopic structure is connected to the bracket via a third rotating shaft, and the fixed end of the first telescopic structure is connected to the sliding frame via the first rotating shaft.

[0015] Preferably, a sound sensor is provided on one side of the pressure block.

[0016] Preferably, it also includes a lubrication method, which includes the following steps: Step 1: Noise is detected by a sound sensor each time the dual-output shaft motor drives the gear to mesh with the tooth groove through the connecting shaft. Step 2: After the sound sensor detects that the noise generated by the meshing of the gear and the tooth groove exceeds the preset threshold, the second telescopic structure pushes the pressure block to make the adapter groove engage with the tooth groove, the pump starts and draws the lubricant in the storage chamber, so that the lubricant is delivered to the tooth groove surface on both sides of the current gear meshing position through the transmission pipe. Step 3: After the lubricant injection in Step 2 is completed, the sound sensor will not detect noise when the dual-shaft motor drives the gear to rotate again. Step 4: When the dual-output shaft motor drives the gear to rotate again, the sound sensor will detect noise again. If the detected noise exceeds the preset threshold, Step 2 will be repeated.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention provides a second telescopic structure and a pressure block on both sides of the gear. The adapter groove at the lower end of the pressure block engages with the tooth groove to form a mechanical locking position independent of the gear meshing. The core function of this locking is that when a vehicle collision occurs, the engagement structure between the adapter groove and the tooth groove can provide an anti-shear locking force independent of the gear meshing. Even if the gear meshing skips teeth or fails due to impact load, the pressure block locking mechanism can still constrain the connecting block on the guide rod to prevent the sliding frame from generating unexpected displacement. This dual locking improves the structural integrity of the seat cushion assembly and the safety of the occupants under collision conditions.

[0018] 2. This invention, by setting up a shield to prevent foreign objects from entering the meshing area, and by using sound-absorbing cotton to absorb external environmental noise, ensures a clean meshing environment for the gear and rack pair and the detection accuracy of the sound sensor. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall external structure of the present invention; Figure 2 This is a cross-sectional view of the guide rod transmission structure of the present invention; Figure 3 For the present invention Figure 2 Enlarged view of a portion of region A in the middle; Figure 4 For the present invention Figure 2 Enlarged view of a portion of region B in the middle; Figure 5 For the present invention Figure 2 Enlarged view of a portion of region C in the middle; Figure 6 For the present invention Figure 2 Enlarged view of a portion of region D.

[0020] In the diagram: 1. Base; 2. Sliding frame; 3. First telescopic structure; 4. First rotating shaft; 5. Bracket; 6. Second rotating shaft; 7. Dual-output shaft motor; 8. Connecting shaft; 9. Third rotating shaft; 10. Guide rod; 11. Gear groove; 12. Gear; 13. Movable cavity; 14. Connecting end; 15. Cover; 16. Sound-absorbing cotton; 17. Connecting block; 18. Sound sensor; 19. Storage cavity; 20. Pump; 21. Transmission pipe; 22. Buffer cavity; 23. Second telescopic structure; 24. Pressing block; 25. Soaking cavity; 26. Adaptor groove; 27. Mounting cavity; 28. Vent hole. Detailed Implementation

[0021] The present invention will be further described below with reference to specific embodiments.

[0022] like Figure 1 As shown, an electric four-way seat cushion assembly for automobiles with an anti-collision structure in this embodiment includes a base 1, a sliding frame 2, and a bracket 5. The base 1 is used to fix the seat cushion to the vehicle floor, the sliding frame 2 is slidably disposed on the base 1, and the bracket 5 is used to support the seat cushion.

[0023] The transmission structure for the seat cushion's forward and backward sliding and longitudinal angle adjustment is already existing technology in this field. For example, the forward and backward sliding of the seat cushion can adopt an engaging transmission method, the specific structure of which can be found in Chinese Patent CN219749572U. The rear end of the seat cushion can be raised by a pushing and rotating transmission method, the specific structure of which can be found in Chinese Patent CN223949018U. The present invention will not elaborate on the implementation of the adjustment functions in the above two directions.

[0024] like Figure 2 As shown, two connecting ends 14 are fixedly installed on the base 1. The two connecting ends 14 are located at both ends of the base 1 along the length direction. The two ends of the guide rod 10 are suspended and supported above the base 1 through the two connecting ends 14. That is to say, there is a certain gap between the guide rod 10 and the upper surface of the base 1. This gap provides sliding space for the sliding frame 2 and the connecting block 17 on it. A series of continuously arranged toothed grooves 11 are opened on the upper surface of the guide rod 10 along the length direction. The openings of the toothed grooves 11 face upward. The toothed grooves 11 are used to mesh with the gear 12.

[0025] Connecting blocks 17 are fixedly installed on both sides of the sliding frame 2. Each connecting block 17 passes through the outside of the corresponding guide rod 10 along the length direction of the guide rod 10. The connecting block 17 is hollow inside and forms a movable cavity 13. The guide rod 10 passes through the movable cavity 13, so that the connecting block 17 can slide freely along the length direction of the guide rod 10. It is through this sliding cooperation between the connecting block 17 and the guide rod 10 that the sliding frame 2 as a whole can move back and forth relative to the base 1.

[0026] A gear 12 is also provided in the movable cavity 13 of the connecting block 17. The gear 12 is located in the middle of the movable cavity 13. The lower end of the gear 12 meshes with the tooth groove 11 on the upper surface of the guide rod 10. In this invention, there are two gears 12, located on both sides of the sliding frame 2. The lower end of each gear 12 is provided with its own tooth groove 11 and guide rod 10. The two gears 12 are driven synchronously by the same dual-output shaft motor 7. The dual-output shaft motor 7 is located in the middle of the sliding frame 2. The output shafts at both ends of the dual-output shaft motor 7 are respectively connected to the corresponding gears 12 through the connecting shaft 8. After the dual-output shaft motor 7 is started, the output shafts at both ends of the dual-output shaft motor 7 rotate synchronously, which drives the gears 12 on both sides to rotate synchronously through the connecting shaft 8. The gears 12 mesh with the tooth groove 11, thereby driving the connecting block 17 to slide along the guide rod 10, and finally realizing the overall front-to-back displacement of the sliding frame 2 relative to the base 1.

[0027] The movable cavity 13 has mounting cavities 27 on both sides. Each mounting cavity 27 has a fixed second telescopic structure 23. The gear 12 has a second telescopic structure 23 on each side along its axial direction. The second telescopic structure 23 can be in the form of a miniature cylinder, a miniature hydraulic cylinder, or an electromagnetic push rod. The fixed end of the second telescopic structure 23 is fixed to the side wall of the mounting cavity 27, and the telescopic end of the second telescopic structure 23 extends towards the tooth groove 11. The telescopic end of the second telescopic structure 23 is fixedly connected to a pressure block 24. The lower surface of the pressure block 24 is provided with an adapter groove 26. The shape of the adapter groove 26 matches the outer contour of the tooth groove 11. The pressure block 24 with the adapter groove 26 can form a slot connection with the tooth groove 11. When the telescopic end of the second telescopic structure 23 extends, it pushes the pressure block 24 to move downward until the adapter groove 26 engages with the outer contour of the tooth groove 11. When the telescopic end of the second telescopic structure 23 retracts, the pressure block 24 moves upward and disengages from the tooth groove 11.

[0028] In normal use, when the gear 12 stops rotating and the sliding frame 2 needs to be held in a certain forward or backward position, the second telescopic structure 23 pushes the pressure block 24 down, so that the adapter groove 26 engages with the tooth groove 11. At this time, the pressure block 24 is equivalent to adding an extra set of mechanical locking points in addition to the meshing of the gear 12 and the tooth groove 11. The pressure block 24 tightly hugs the outer contour of the tooth groove 11 through the adapter groove 26, which has a locking effect.

[0029] When a vehicle collides, especially a frontal or side impact, the instantaneous impact force is quickly transmitted through the vehicle body to the sliding frame 2, attempting to push the sliding frame 2 to slip unexpectedly along the guide rod 10. At this time, since the matching groove 26 of the pressure block 24 and the tooth groove 11 are already in a locked state, the pressure block 24 can provide an anti-shear locking force independent of the gear 12 meshing. Even if the gear 12 meshing skips teeth or undergoes plastic deformation due to impact load, the pressure block 24 can still firmly constrain the connecting block 17 to the guide rod 10, preventing it from sliding along the guide rod 10. The engagement of the pressure block 24 and the tooth groove 11 is not just a position lock in the normal static state, but is essentially an anti-collision locking structure designed specifically for collision conditions. The engagement and locking of the pressure block 24 and the gear 12 itself together constitute a double locking system, reducing the risk of unexpected displacement of the seat cushion after a collision. It is suitable for car seat applications with high safety requirements.

[0030] like Figure 5 As shown, a buffer cavity 22 is recessed in the side wall of the mounting cavity 27. The function of the buffer cavity 22 is to provide temporary storage space for the transmission pipe 21. The transmission pipe 21 is a flexible pipe connecting the pump 20 and the pressure block 24. At least part of the transmission pipe 21 is a flexible pipe. When the second telescopic structure 23 drives the pressure block 24 to retract, the transmission pipe 21 is pulled along with the movement of the second telescopic structure 23. At this time, the buffer cavity 22 can accommodate the excess length of the transmission pipe 21, preventing the pipe from bending or getting stuck in the narrow mounting cavity 27.

[0031] like Figure 6 As shown, the side of the pressure block 24 near the adapter groove 26 has a recessed soaking chamber 25. The soaking chamber 25 is a recessed accommodating space. When the adapter groove 26 is engaged with the toothed groove 11, the soaking chamber 25 is located directly above the toothed groove 11. The pressure block 24 is connected to the outlet end of the pump 20 located on the upper end of the connecting block 17 via the transmission pipe 21. The inlet end of the pump 20 is connected to the storage chamber 19, which stores lubricating fluid. When the second telescopic structure 23 pushes the pressure block 24 to engage the adapter groove 26 with the toothed groove 11, the pump 20 starts and pumps the lubricating fluid in the storage chamber 19 to the soaking chamber 24 via the transmission pipe 21. In the soaking chamber 25, since the fitting groove 26 of the pressure block 24 is in close contact with the outer contour of the tooth groove 11, the soaking chamber 25 becomes a relatively closed space. After the lubricant is injected, it can continuously contact and wet the tooth groove 11 area currently covered by the soaking chamber 25. It should be emphasized that the tooth groove 11 area covered by the soaking chamber 25 is located on both sides of the meshing position of the gear 12. That is to say, the lubricant is precisely delivered to the surface of the tooth groove 11 that the gear 12 is about to pass through, rather than being sprayed aimlessly on the entire rack. This fixed-point and quantitative lubrication method not only ensures the lubrication effect, but also avoids the waste and contamination of the lubricant.

[0032] A vent hole 28 is provided on the side of the pressure block 24 away from the adapter groove 26. The vent hole 28 is connected to the soaking chamber 25. The function of the vent hole 28 is to balance the air pressure between the inside of the soaking chamber 25 and the external environment. When the pump 20 injects lubricating fluid into the soaking chamber 25, the air in the soaking chamber 25 needs to be discharged, otherwise the liquid cannot enter smoothly. The position of the vent hole 28 is higher than the lubricating fluid level in the soaking chamber 25. This can ensure smooth ventilation and prevent the lubricating fluid from overflowing from the vent hole 28.

[0033] The guide rod 10 is suspended and supported on the base 1 at both ends via the connecting end 14. An L-shaped shield 15 is provided at each connecting end 14. One side of the shield 15 is fixedly connected to the connecting end 14, and the other side of the shield 15 extends parallel to the upper end of the guide rod 10. However, this horizontal side does not hinder the meshing connection between the tooth groove 11 and the gear 12. That is to say, the horizontal side of the shield 15 is located at a certain distance above the tooth groove 11 and will not interfere with the gear 12. The function of the shield 15 is to block the front and rear ends of the space between the base 1 and the sliding frame 2. In actual use, foreign objects such as dust, sand and mud brought in by shoes on the vehicle floor may enter the interior through the gap between the base 1 and the sliding frame 2. Once these foreign objects fall into the meshing area of ​​the tooth groove 11 or the gear 12, they will not only affect the smoothness of meshing, but may also accelerate the wear of the tooth surface or even cause jamming. The shield 15 effectively blocks the entry path of foreign objects and ensures the cleanliness of the meshing environment between the gear 12 and the tooth groove 11.

[0034] like Figure 3 and Figure 4 As shown, the outer wall of the shield 15 is further provided with sound-absorbing cotton 16. The sound-absorbing cotton 16 is made of porous sound-absorbing material, which can absorb noise from the external environment, especially road noise, wind noise and engine vibration noise from the vehicle during driving. Since the sound sensor 18 needs to accurately detect the specific frequency noise generated by the meshing of the gear 12 and the tooth groove 11, any interference from external environmental noise may cause the sensor to misjudge. The presence of sound-absorbing cotton 16 effectively reduces the impact of external noise on the detection accuracy of the sound sensor 18, enabling the sound sensor 18 to more accurately capture the true state of the meshing noise.

[0035] The bracket 5 is rotatably connected to the sliding frame 2 via the second rotating shaft 6. A first telescopic structure 3 is also provided between the sliding frame 2 and the bracket 5. The first telescopic structure 3 can be in the form of an electric push rod or a gas spring. The fixed end of the first telescopic structure 3 is rotatably connected to the sliding frame 2 via the first rotating shaft 4, and the telescopic end of the first telescopic structure 3 is rotatably connected to the bracket 5 via the third rotating shaft 9. When the telescopic end of the first telescopic structure 3 extends or retracts, it pushes the bracket 5 to rotate around the second rotating shaft 6, thereby raising or lowering the height of the rear end of the bracket 5, i.e., adjusting the longitudinal angle of the seat cushion. Since the specific transmission structure for adjusting the longitudinal angle of the seat cushion has been disclosed in the prior art, this invention will not elaborate on it. Those skilled in the art can realize this function based on the prior art.

[0036] The sound sensor 18 is located on one side of the pressure block 24. Although the present invention has two gears 12, only one sound sensor 18 is provided on one side of each gear 12. The sound sensor 18 is used to detect the noise signal generated during the meshing process of the gear 12 and the tooth groove 11 in real time, and transmit the signal to the controller (not shown in the figure). The controller has a preset noise threshold, which corresponds to the upper limit of normal meshing noise of the gear 12 and the tooth groove 11 under fully lubricated conditions. When the noise detected by the sound sensor 18 exceeds the preset threshold, the controller determines that the surface of the tooth groove 11 is not sufficiently lubricated.

[0037] The control logic of the lubrication method is as follows: Each time the dual-output shaft motor 7 drives the gear 12 to mesh with the tooth groove 11 through the connecting shaft 8, the sound sensor 18 detects noise. When the sound sensor 18 detects noise exceeding the preset threshold during the first meshing process, the controller issues a command to cause the second telescopic structure 23 to push the pressure block 24 down, so that the adapter groove 26 engages with the tooth groove 11. Then, the pump 20 starts, pumping the lubricant in the storage chamber 19 through the transmission pipe 21 to the soaking chamber 25 in the pressure block 24, so that the lubricant continuously contacts and wets the tooth groove 11 area covered by the current pressure block 24, which is the gear 12. After lubrication is completed on both sides of the meshing position, the sound sensor 18 pauses detection when the gear 12 rotates for the next time. This design is based on the consideration that the injected lubricant needs a certain amount of time and gear rotation to fully spread and distribute on the surface of the tooth groove 11. If detection is performed immediately, it may be mistakenly judged as insufficient lubrication because the lubricant has not yet been evenly covered. After one rotation stroke, the sound sensor 18 resumes detection when the gear 12 rotates for the next time. If the noise detected at this time still exceeds the preset threshold, the above lubrication operation is repeated. If the noise does not exceed the preset threshold, normal monitoring continues. This cycle is repeated to achieve lubrication on demand.

[0038] The lubrication logic of this application is detection, lubrication, quiescent, and re-detection. This sequence avoids the redundant judgment caused by detection with each rotation, and provides sufficient time for lubricant distribution through a quiescent rotation, ensuring the accuracy of the detection results. Compared with traditional continuous detection or timed lubrication methods, the lubrication method of this invention is more intelligent, more precise, and consumes less lubricant.

[0039] Finally, a supplementary explanation of the flow path of the lubricant in the soaking chamber 25 is given. When the pump 20 pumps the lubricant into the soaking chamber 25, the lower opening of the soaking chamber 25 is closed by the tooth groove 11 because the adapter groove 26 engages with the outer contour of the tooth groove 11. The lubricant can accumulate in the soaking chamber 25. At this time, a local area of ​​the tooth groove 11 is equivalent to being soaked in the lubricant. The lubricant can fully penetrate into the micro-texture of the surface of the tooth groove 11. When the gear 12 rotates through this area, the tooth surface contacts the tooth groove 11 that has been wetted with lubricant. The lubricant is transferred to the tooth surface of the gear 12, thereby achieving lubrication of the meshing surface. Since the pressure block 24 is set on both sides of the gear 12, whether the gear 12 rotates forward or backward, its tooth surface will pass through the lubricated tooth groove 11 area before entering the meshing area, thereby ensuring effective lubrication during bidirectional rotation.

[0040] Working principle: When adjusting the height of the bracket 5, the telescopic end of the first telescopic structure 3 extends, pushing the bracket 5 through the third rotating shaft 9. At the same time, the fixed end of the first telescopic structure 3 is kept in rotational connection with the sliding frame 2 through the first rotating shaft 4. Under the push of the first telescopic structure 3, the bracket 5 rotates relative to the sliding frame 2 with the second rotating shaft 6 as the center, thereby raising or lowering the height of the rear end of the seat cushion. When adjusting the front and rear position of the bracket 5, the dual-output shaft motor 7 starts, and its output shafts at both ends drive the gears 12 in the connecting blocks 17 on both sides to rotate through the connecting shaft 8. The gears 12 interact with the upper surface of the guide rod 10 fixed on the base 1. When the gear 12 rotates, it drives the connecting block 17 to slide along the guide rod 10, thereby causing the entire sliding frame 2 to move back and forth relative to the base 1. When the gear 12 stops rotating and the position of the sliding frame 2 needs to be fixed, the telescopic end of the second telescopic structure 23 extends, pushing the pressure block 24 toward the gear 11, so that the matching groove 26 at the lower end of the pressure block 24 engages with the outer contour of the gear 11. The engagement of the pressure block 24 with the gear 11 forms a mechanical lock, which can not only assist in fixing the sliding frame 2 during normal use, but also provide additional anti-collision locking capability when the vehicle is hit, preventing the sliding frame 2 from undergoing unexpected displacement due to impact force. During the meshing process of gear 12 and tooth groove 11, the sound sensor 18 located on one side of the pressure block 24 detects the meshing noise in real time. When the sound sensor 18 detects noise exceeding a preset threshold during the first meshing process, the sound sensor 18 determines that the surface of tooth groove 11 is not sufficiently lubricated. At this time, the second telescopic structure 23 pushes the pressure block 24 to engage the fitting groove 26 with the tooth groove 11. Subsequently, the pump 20 starts, extracts the lubricating fluid from the storage chamber 19, and delivers it to the soaking chamber 25 in the pressure block 24 via the transmission pipe 21. Since the fitting groove 26 of the pressure block 24 is in close contact with the outer contour of the tooth groove 11, the lubricating fluid continuously contacts and... The lubricant is applied to the tooth groove 11 area covered by the current pressure block 24. This area is the area on both sides of the meshing position that the gear 12 will pass through, so that the tooth surface of the subsequent gear 12 can be fully lubricated when it rotates, reducing meshing noise. When the gear 12 rotates again, which is the first rotation after lubrication, the sound sensor 18 stops detecting to allow time for the lubricant to be fully distributed. When the gear 12 rotates again, the sound sensor 18 resumes detecting. If the noise still exceeds the preset threshold, the above lubrication operation is repeated, that is, the pump 20 is restarted. If the noise does not exceed the preset threshold, normal monitoring continues. This cycle is repeated to achieve lubrication on demand.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. A car electric four-way seat cushion assembly with an anti-collision structure, comprising a sliding frame (2), wherein a bracket (5) is provided on the sliding frame (2), and the sliding frame (2) is slidably disposed on a base (1), characterized in that, The sliding frame (2) is provided with a connecting block (17). A guide rod (10) is passed through the connecting block (17) along the length direction of the base (1). A tooth groove (11) is provided on the upper surface of the guide rod (10). A gear (12) is meshed with the upper end of the tooth groove (11). A second telescopic structure (23) is provided on each side of the gear (12) along its axial direction. A pressure block (24) is provided on the telescopic end of the second telescopic structure (23) facing the tooth groove (11). An adapter groove (26) is provided on the outer surface of the pressure block (24) to be connected to the tooth groove (11).

2. The automotive electric four-way seat cushion assembly with anti-collision structure according to claim 1, characterized in that, The pressure block (24) has a recessed soaking chamber (25) on the side near the adapter groove (26). The pressure block (24) is connected to the liquid outlet of the pump (20) on the connecting block (17) through the transmission pipe (21). After the pressure block (24) is pushed by the second telescopic structure (23) to the adapter groove (26) and engage with the tooth groove (11), the lubricating liquid is injected into the soaking chamber (25) through the transmission pipe (21) and continuously contacts the tooth groove (11).

3. The automotive electric four-way seat cushion assembly with anti-collision structure according to claim 2, characterized in that, The pressure block (24) has a vent hole (28) on the side away from the adapter groove (26). The vent hole (28) is connected to the soaking chamber (25), and the position of the vent hole (28) is higher than the surface of the lubricating liquid in the soaking chamber (25).

4. The automotive electric four-way seat cushion assembly with anti-collision structure according to claim 2, characterized in that, The connecting block (17) has a movable cavity (13) in the middle position, the gear (12) is located in the movable cavity (13), and there are mounting cavities (27) on both sides of the movable cavity (13). The fixed end of the second telescopic structure (23) is fixed in the mounting cavity (27).

5. The automotive electric four-way seat cushion assembly with anti-collision structure according to claim 4, characterized in that, The side wall of the mounting cavity (27) has a recessed buffer cavity (22), and at least part of the transmission pipe (21) is a flexible pipe. When the second telescopic structure (23) drives the pressure block (24) to contract, the transmission pipe (21) can be temporarily stored in the buffer cavity (22).

6. The automotive electric four-way seat cushion assembly with anti-collision structure according to claim 4, characterized in that, The upper end of the connecting block (17) is provided with a pump (20) and a storage chamber (19). The liquid outlet of the storage chamber (19) is connected to the liquid inlet of the pump (20), and the liquid outlet of the pump (20) is sealed to the transmission pipe (21). The storage chamber (19) stores lubricating fluid.

7. The automotive electric four-way seat cushion assembly with anti-collision structure according to claim 6, characterized in that, The sliding frame (2) is equipped with a dual-output shaft motor (7), and the output shafts at both ends of the dual-output shaft motor (7) are respectively connected to the corresponding gears (12) via connecting shafts (8).

8. The automotive electric four-way seat cushion assembly with anti-collision structure according to claim 1, characterized in that, The bracket (5) is rotatably connected to the sliding frame (2) via the second rotating shaft (6). A first telescopic structure (3) is also provided between the sliding frame (2) and the bracket (5). The telescopic end of the first telescopic structure (3) is connected to the bracket (5) via the third rotating shaft (9), and the fixed end of the first telescopic structure (3) is connected to the sliding frame (2) via the first rotating shaft (4).

9. The automotive electric four-way seat cushion assembly with anti-collision structure according to claim 7, characterized in that, A sound sensor (18) is provided on one side of the pressure block (24).

10. The automotive electric four-way seat cushion assembly with an anti-collision structure according to claim 9, characterized in that, It also includes lubrication methods, which include the following steps: Step 1: Each time the dual-output shaft motor (7) drives the gear (12) to mesh with the tooth groove (11) through the connecting shaft (8), the noise is detected by the sound sensor (18); Step 2: After the sound sensor (18) detects that the noise generated by the meshing of the gear (12) and the tooth groove (11) exceeds the preset threshold, the second telescopic structure (23) pushes the pressure block (24) to make the adapter groove (26) engage with the tooth groove (11), the pump (20) starts and draws the lubricant in the storage chamber (19), so that the lubricant is transported through the transmission pipe (21) to the tooth groove (11) surface on both sides of the current gear (12) meshing position; Step 3: After the lubricant injection in Step 2 is completed, when the dual-shaft motor (7) drives the gear (12) to rotate again, the sound sensor (18) will not perform noise detection. Step 4: When the dual-output shaft motor (7) drives the gear (12) to rotate again, the sound sensor (18) will perform noise detection again. If the detected noise exceeds the preset threshold, step 2 will be repeated.

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