Safety belt delivery device, safety belt assembly, vehicle and control method

Abstract

The present application belongs to the technical field of safety belt, and particularly relates to a safety belt delivery device, a safety belt assembly, a vehicle and a control method. The safety belt delivery device is used for the safety belt assembly, the safety belt assembly comprises a belt and a lock tongue connected to the belt, and the safety belt delivery device comprises a mounting seat, a driving mechanism and a lock tongue delivery piece. The mounting seat is suitable for being mounted on a vehicle body, the driving mechanism is mounted on the mounting seat, and an output end of the driving mechanism is in transmission connection with the lock tongue delivery piece. The lock tongue delivery piece is used for temporarily fixing the lock tongue of the safety belt assembly, and the driving mechanism can drive the lock tongue delivery piece to move towards a vehicle seat to deliver the lock tongue. In the present application, after the lock tongue delivery piece temporarily fixes the lock tongue, the driving mechanism drives the lock tongue delivery piece to move towards the seat to deliver the lock tongue, so that the lock tongue enters the visual range of a passenger, and the passenger is greatly facilitated to take the lock tongue without turning around to find the lock tongue.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of safety belts, in particular to a safety belt delivery device, a safety belt assembly, a vehicle and a control method. BACKGROUND

[0002] The safety belt is an important part of the safety system of the whole vehicle, which affects the personal safety and wearing comfort of the passengers. The most critical thing for the passengers in the process of buckling the safety belt is to find the position of the lock tongue.

[0003] However, the lock tongue arranged on the side of the seat is inconvenient to take, and the passengers need to turn around to find the lock tongue located at the rear of the seat, which is not good experience. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a safety belt delivery device, a safety belt assembly, a vehicle and a control method to solve the problem of inconvenient taking of the lock tongue of the existing safety belt.

[0005] To solve the above technical problems, on the one hand, the present application provides a safety belt delivery device for a safety belt assembly, the safety belt assembly comprising a webbing and a lock tongue connected to the webbing, comprising a mounting seat, a driving mechanism and a lock tongue delivery member, the mounting seat being adapted to be mounted on the vehicle body, the driving mechanism being mounted on the mounting seat, the output end of the driving mechanism being drivingly connected to the lock tongue delivery member;

[0006] The lock tongue delivery member is used to temporarily fix the lock tongue of the safety belt assembly, and the driving mechanism can drive the lock tongue delivery member to move towards the vehicle seat to send out the lock tongue.

[0007] Optionally, it further comprises a magnetic attraction assembly for connecting the lock tongue delivery member and the lock tongue;

[0008] The magnetic attraction assembly comprises magnetic attraction members and magnetic force limit buckles which are attracted to each other, one of the magnetic attraction members and the magnetic force limit buckles is arranged on the lock tongue delivery member, and the other is adapted to be arranged on the lock tongue or the webbing of the safety belt assembly.

[0009] Optionally, the magnetic attraction members are arranged on the lock tongue delivery member, and the magnetic force limit buckles are arranged on the lock tongue.

[0010] Optionally, the magnetic attraction members are arranged on the lock tongue delivery member, and the magnetic force limit buckles are arranged on the webbing.

[0011] When the driving mechanism drives the lock tongue delivery member to move, the lock tongue and the magnetic force limit buckles are relatively stationary.

[0012] Optionally, the lock tongue delivery member is provided with a containing space for containing the lock tongue.

[0013] The width of the tongue delivery member gradually increases from top to bottom to prevent the tongue from leaving the accommodation space when the tongue delivery member drives the tongue to move.

[0014] Optionally, the tongue delivery member comprises a first connecting plate, a second connecting plate and a third connecting plate, the first connecting plate and the third connecting plate are oppositely arranged, and the second connecting plate is connected between the first connecting plate and the third connecting plate to define the accommodation space.

[0015] The distance between the first connecting plate and the third connecting plate gradually increases from top to bottom.

[0016] Optionally, the driving mechanism comprises a motor, a hydraulic pump and a multi-stage hydraulic cylinder, the motor is connected to the hydraulic pump, the hydraulic pump is connected to the multi-stage hydraulic cylinder, and the motor drives the hydraulic pump to generate hydraulic pressure to make the multi-stage hydraulic cylinder in an elongated state and drive the tongue delivery member to move.

[0017] Optionally, the motor is adapted to be electrically connected to a vehicle controller.

[0018] Optionally, the safety belt delivery device further comprises a power supply controller, the power supply controller is installed on the hydraulic pump, and the power supply controller is adapted to be electrically connected to the vehicle controller.

[0019] Optionally, the tongue delivery member is provided with an illuminating member, and the illuminating member is electrically connected to the power supply controller.

[0020] Optionally, an obstacle sensor is arranged at an end of the tongue delivery member away from the driving mechanism, and the obstacle sensor is used to sense an obstacle when the tongue delivery member moves.

[0021] The obstacle sensor is adapted to be electrically connected to the vehicle controller.

[0022] In another aspect, the embodiment of the present application provides a safety belt assembly comprising a tongue, a webbing and the safety belt delivery device as described above.

[0023] Optionally, a buckle is further included, and the tongue is detachably connected to the buckle.

[0024] A micro switch is arranged on the buckle, the micro switch is adapted to be electrically connected to the vehicle controller, and the micro switch can be triggered when the tongue is inserted into the buckle.

[0025] In another aspect, the embodiment of the present application provides a vehicle comprising the safety belt assembly as described above.

[0026] In still another aspect, the embodiment of the present application provides a control method, applied to the vehicle as described above, comprising:

[0027] Obtaining gravity information of the seat;

[0028] According to the gravity information, controlling the driving mechanism to operate, and the driving mechanism drives the lock tongue delivery member to move to deliver the lock tongue to the passenger.

[0029] Optionally, further comprising:

[0030] Obtaining position information of the lock tongue;

[0031] According to the position information, the vehicle controller controls the driving mechanism to drive the lock tongue delivery member to reset;

[0032] The position information is the position information when the lock tongue is inserted into the buckle.

[0033] The safety belt delivery device provided by the embodiment of the present application temporarily fixes the lock tongue through the lock tongue delivery member, and then drives the driving mechanism to drive the lock tongue delivery member to move towards the seat, so as to deliver the lock tongue to the front side of the seat, so that the lock tongue enters the visual range of the passenger, greatly facilitates the passenger to take the lock tongue, and improves the use experience of the passenger. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 is a schematic view of the safety belt delivery device provided by the embodiment of the present application on the vehicle body;

[0035] Figure 2 is a schematic view of the safety belt delivery device provided by the embodiment of the present application;

[0036] Figure 3 is a cross-sectional schematic view of the safety belt delivery device provided by the embodiment of the present application;

[0037] Figure 4 is a schematic view of a primary sleeve cylinder provided by the embodiment of the present application;

[0038] Figure 5 is a schematic view of a secondary sleeve cylinder provided by the embodiment of the present application;

[0039] Figure 6 is a cooperation schematic view of the primary sleeve cylinder, the secondary sleeve cylinder and the tertiary sleeve cylinder provided by the embodiment of the present application;

[0040] Figure 7 is a delivery position schematic view of the safety belt delivery device provided by the embodiment of the present application.

[0041] The reference signs in the specification are as follows:

[0042] 10, safety belt delivery device;

[0043] 1. mounting seat;

[0044] 2. driving mechanism; 21. motor; 22. hydraulic pump; 23. multi-stage hydraulic cylinder;

[0045] 231. first-stage sleeve cylinder; 2311. first sleeve; 2312. first piston; 23121. first oil inlet; 23122. first oil outlet; 2313. first oil pipe; 2314. first positive pressure cavity; 2315. first negative pressure cavity;

[0046] 232. second-stage sleeve cylinder; 2321. second sleeve; 2322. second piston; 23221. second oil inlet; 23222. second oil outlet; 23223. first connecting hole; 2323. second oil pipe; 2324. first sealing ring; 2325. second positive pressure cavity; 2326. second negative pressure cavity;

[0047] 233. third-stage sleeve cylinder; 2331. third sleeve; 23311. accommodating cavity; 2332. third piston; 23321. third oil outlet; 23322. second connecting hole; 2333. second sealing ring;

[0048] 3. lock tongue delivery piece; 31. magnetic attraction piece; 32. accommodating space; 33. first connecting plate; 34. second connecting plate; 35. third connecting plate; 36. illuminating piece; 37. obstacle sensor;

[0049] 4. power supply controller;

[0050] 5. bending sleeve; 51. sealing piece;

[0051] 6. built-in wire group;

[0052] 20. safety belt assembly; 201. woven tape; 2011. magnetic limiting buckle; 202. lock tongue;

[0053] 30. inner wall of vehicle body side wall. DETAILED DESCRIPTION

[0054] In order to make the technical problems solved by the present application, technical solutions and beneficial effects more clearly understood, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0055] As Figures 1 to 7As shown, an embodiment of the present application provides a safety belt delivery device 10 for a safety belt assembly 20, the safety belt assembly 20 includes a belt 201 and a tongue 202 connected to the belt 201, the process of inserting the tongue 202 into a buckle is the process of passenger wearing the safety belt, the safety belt delivery device 10 is installed on the inner wall 30 of the vehicle body side wall, which can realize the delivery of the safety belt to the front of the passenger side, and push the tongue 202 of the safety belt assembly 20 to a position convenient for the passenger to take.

[0056] The safety belt delivery device 10 includes a mounting seat 1, a driving mechanism 2 and a tongue delivery member 3, the mounting seat 1 is fixed on the inner wall 30 of the vehicle body side wall by bolts, and the connection between the safety belt delivery device 10 and the inner wall 30 of the vehicle body side wall is realized through the mounting seat 1. The driving mechanism 2 is installed on the mounting seat 1, and the output end of the driving mechanism 2 is drivingly connected to the tongue delivery member 3, which can reciprocate under the driving of the driving mechanism 2. The tongue delivery member 3 is used to temporarily fix the tongue 202 of the safety belt assembly, and the driving mechanism 2 can drive the tongue delivery member 3 to move towards the side front of the vehicle seat, so as to deliver the tongue 202 to the passenger, and after the passenger inserts the tongue 202 into the buckle, the driving mechanism 2 drives the tongue delivery member 3 to return to the original position, and the delivery of the tongue 202 is completed.

[0057] In this embodiment, after the tongue 202 is temporarily fixed by the tongue delivery member 3, the driving mechanism 2 drives the tongue delivery member 3 to move towards the seat, so as to deliver the tongue 202 to the side front of the seat, and the tongue 202 enters the visual range of the passenger, which greatly facilitates the passenger to take the tongue 202, and the passenger does not need to turn around to find the tongue 202, and the use experience of the passenger is improved.

[0058] In an embodiment, as shown in Figure 2 , Figure 3 The safety belt delivery device 10 further includes a magnetic attraction assembly for connecting the tongue delivery member 3 and the tongue 202. The magnetic attraction assembly includes magnetic attraction members 31 and magnetic force limiting buckles 2011 which are attracted to each other, one of the magnetic attraction members 31 and the magnetic force limiting buckles 2011 is arranged on the tongue delivery member 3, and the other is adapted to be arranged on the tongue or the belt of the safety belt assembly 20, and the temporary fixing of the tongue delivery member 3 and the tongue 202 is realized through the mutual attraction of the magnetic attraction members 31 and the magnetic force limiting buckles 2011, and the stability of delivering the tongue 202 is ensured.

[0059] After the lock tongue 202 is delivered to the front of the passenger side, the passenger takes the lock tongue 202 from the lock tongue delivery member 3 and inserts it into the buckle. When the lock tongue 202 is unlocked, the lock tongue 202 is taken out of the buckle, and through the mutual attraction of the magnetic attraction member 31 and the magnetic force limiting buckle 2011, the safety belt can be accurately adsorbed back to the position, facilitating the movement of the lock tongue 202 driven by the safety belt delivery device 10. Among them, at least one of the magnetic attraction member 31 and the magnetic force limiting buckle 2011 is a magnet, which can be selected and set according to actual use requirements. The attraction force of the magnetic attraction member 31 and the magnetic force limiting buckle 2011 cannot be too large, and is controlled between about 40N, so that the passenger takes the lock tongue 202 more labor-saving.

[0060] In an embodiment, the magnetic force member is arranged on the lock tongue delivery member 3, and the magnetic force limiting buckle 2011 can be arranged on the lock tongue 202 or the woven tape 201, which can temporarily fix the lock tongue 202 on the lock tongue delivery member 3.

[0061] In one of the embodiments, the magnetic attraction member 31 is arranged on the lock tongue delivery member 3, and the magnetic force limiting buckle 2011 is arranged on the lock tongue 202. Under the attraction of the magnetic attraction member 31 and the magnetic force limiting buckle 2011, the lock tongue 202 is limited on the lock tongue delivery member 3, so that the lock tongue 202 and the lock tongue delivery member 3 remain relatively static during the movement of the lock tongue delivery member 3 driven by the driving mechanism 2, facilitating the delivery of the lock tongue 202.

[0062] In one of the embodiments, as shown in Figure 2 , Figure 3 , the magnetic attraction member 31 is arranged on the lock tongue delivery member 3, and the magnetic force limiting buckle 2011 is arranged on the woven tape 201. Further, the magnetic force limiting buckle 2011 is arranged on a section of the woven tape 201 close to the lock tongue 202. When the driving mechanism 2 drives the lock tongue delivery member 3 to move, the lock tongue 202 and the magnetic force limiting buckle 2011 remain relatively static, and the magnetic force limiting buckle 2011 is adsorbed on the magnetic attraction member 31, so that the lock tongue 202 and the lock tongue delivery member 3 remain relatively static during the movement, ensuring that the lock tongue 202 does not slide along the woven tape 201 during the delivery of the lock tongue 202, avoiding affecting the adsorption effect of the magnetic force limiting buckle 2011 and the magnetic attraction member 31, and further affecting the temporary fixation of the lock tongue 202 and the lock tongue delivery member 3.

[0063] In a non-use state of the safety belt, the height of the lock tongue 202 can be limited by the magnetic force limiting buckle 2011, and the position of the lock tongue 202 is limited to prevent the lock tongue 202 from falling.

[0064] In an embodiment, as shown in Figure 2 , Figure 3As shown, the tongue delivery member 3 is provided with a receiving space 32 for accommodating the tongue 202, and the tongue 202 is kept in the receiving space 32 during the delivery process. After the tongue 202 is pulled out of the buckle, the tongue 202 is returned and enters the receiving space 32.

[0065] In order to keep the tongue 202 in the receiving space 32, the width of the tongue delivery member 3 gradually increases from top to bottom in the up-down direction of the vehicle, and the tongue delivery member 3 has a structure of being narrow at the top and wide at the bottom, so as to prevent the tongue 202 from leaving the receiving space 32 when the tongue delivery member 3 drives the tongue 202 to move.

[0066] During the process of the passenger buckling the seat belt, the tongue 202 and the belt 201 usually slide relative to each other. Through the design of the narrow structure of the upper part of the tongue delivery member 3, the tongue 202 can be stopped when it has a tendency to slide upward, so as to prevent the tongue 202 from leaving the receiving space 32, and keep the position of the tongue 202 and the magnetic limiting buckle 2011 relatively fixed, and the magnetic member 31 is always adsorbed with the magnetic limiting buckle 2011.

[0067] In an embodiment, as shown in the drawings, Figure 3 The tongue delivery member 3 includes a first connecting plate 33, a second connecting plate 34 and a third connecting plate 35, the first connecting plate 33, the second connecting plate 34 and the third connecting plate 35 are connected in sequence, the first connecting plate 33 and the third connecting plate 35 are oppositely arranged, and the second connecting plate 34 is connected between the first connecting plate 33 and the third connecting plate 35 to define the receiving space 32, which has a trapezoidal structure.

[0068] The distance between the first connecting plate 33 and the third connecting plate 35 gradually increases from top to bottom, and the tongue 202 is stopped between the upper end of the first connecting plate 33 and the upper end of the third connecting plate 35. The minimum distance between the first connecting plate 33 and the third connecting plate 35 is determined according to the width of the tongue 202, so as to ensure the stopping effect on the tongue 202.

[0069] The magnetic member 31 is arranged on the second connecting plate 34.

[0070] In an embodiment, as shown in the drawings, Figure 2 The driving mechanism 2 includes a motor 21, a hydraulic pump 22 and a multi-stage hydraulic cylinder 23. The motor 21 is connected to the hydraulic pump 22, and the hydraulic pump 22 is connected to the multi-stage hydraulic cylinder 23. The motor 21 drives the hydraulic pump 22 to generate hydraulic pressure, so as to realize the circulation of oil between the hydraulic pump 22 and the multi-stage hydraulic cylinder 23, and enable the multi-stage hydraulic cylinder 23 to present an elongated state and a retracted state.

[0071] After the passenger gets on the vehicle, the motor 21 is rotated forward, the hydraulic pump 22 generates hydraulic pressure, and the multi-stage hydraulic cylinder 23 is in an elongated state, so that the tongue delivery piece 3 can move to the side front of the vehicle seat, thereby delivering the tongue 202 to the side front of the passenger, facilitating the passenger to take the tongue 202. When the passenger inserts the tongue 202 into the belt buckle, the motor 21 is reversed, the multi-stage hydraulic cylinder 23 is retracted, and the tongue delivery piece 3 is returned. The multi-stage hydraulic cylinder 23 is equipped with two built-in oil pipes to realize reciprocating movement of extension and retraction, which can eliminate the speed reducer, has no transmission gap, realizes smooth operation, reduces noise, improves the passenger experience, and improves the quality of the vehicle.

[0072] By using the multi-stage hydraulic cylinder 23 to deliver the tongue 202, the delivery stroke is farther and more accurate, the effective delivery stroke is improved, the passenger's turning angle is reduced, the position of taking the tongue 202 is more suitable for the passenger to exert force, and the passenger has a comfortable experience. After the multi-stage hydraulic cylinder 23 is completely retracted, the volume is small and does not occupy a large space on the B-pillar.

[0073] In an embodiment, the motor 21 is electrically connected to the vehicle controller through a wire. The vehicle controller is provided with a running time of the motor 21. After the vehicle controller obtains a signal of the passenger getting on the vehicle, the signal is transmitted to the motor 21, the motor 21 is rotated forward, the hydraulic pump 22 operates, and the multi-stage hydraulic cylinder 23 is driven to elongate. The multi-stage hydraulic cylinder 23 gradually extends to deliver the tongue 202 adsorbed on the tongue delivery piece 3 to the side front of the passenger. According to the running time set by the vehicle controller, after the multi-stage hydraulic cylinder 23 is completely extended, the motor 21 stops rotating.

[0074] After the passenger takes the tongue 202 and inserts it into the belt buckle, the vehicle controller controls the motor 21 to reverse, the multi-stage hydraulic cylinder 23 starts to contract gradually, and after the multi-stage hydraulic cylinder 23 is completely retracted, the vehicle controller reaches the running time, the motor 21 stops, and the recovery of the multi-stage hydraulic cylinder 23 is completed.

[0075] In an embodiment, as shown in Figure 2 , the safety belt delivery device 10 further comprises a power controller 4, and the power controller 4 is installed on the hydraulic pump 22. The power controller 4 is electrically connected to the vehicle controller through a wire, and the vehicle controller can control the power controller 4 to turn on or off.

[0076] In an embodiment, as shown in Figure 2 , Figure 3 , the tongue delivery piece 3 is provided with an illuminating piece 36 for illumination, and the illuminating piece 36 is electrically connected to the power controller 4. After the vehicle controller obtains a signal of the passenger getting on the vehicle, the signal is transmitted to the power controller 4, the power controller 4 controls the illuminating piece 36 to illuminate, which is convenient for the passenger to take the tongue 202 in poor visibility at night, and is beneficial to improve the comfort of the passenger.

[0077] The illuminating member 36 can be a lamp bead or a lamp strip, and its shape and arrangement position are not limited.

[0078] In an embodiment, as shown in Figure 2 、 Figure 3 The end of the lock tongue delivery member 3 away from the driving mechanism 2 is provided with an obstacle sensor 37, which is arranged on the first connecting plate 33 and is used to sense obstacles when the lock tongue delivery member 3 moves. The obstacle sensor 37 is electrically connected to the vehicle controller.

[0079] After the vehicle controller obtains the signal of the passenger getting on the vehicle, the obstacle sensing is started to ensure the operation of the seat belt delivery device 10. When the obstacle sensor 37 senses the obstacle, it will send a signal to the vehicle controller, and the vehicle controller will control the multi-stage hydraulic cylinder 23 to retract to avoid extrusion and damage to the seat belt delivery device, and to avoid affecting the passenger experience.

[0080] In an embodiment, as shown in Figure 6 The multi-stage hydraulic cylinder 23 includes a first sleeve cylinder 231, a second sleeve cylinder 232, and a third sleeve cylinder 233. The first sleeve cylinder 231 is connected to the hydraulic pump 22. The first sleeve cylinder 231 is arranged outside the second sleeve cylinder 232, and the second sleeve cylinder 232 can slide in the first sleeve cylinder 231. The second sleeve cylinder 232 is arranged outside the third sleeve cylinder 233, and the third sleeve cylinder 233 can slide in the second sleeve cylinder 232.

[0081] The vehicle controller controls the motor 21 to rotate in the forward direction to drive the multi-stage hydraulic cylinder 23 to extend. When the multi-stage hydraulic cylinder 23 extends, the hydraulic oil enters the oil inlet of the first sleeve cylinder 231. Because the area of the second sleeve cylinder 232 is larger than that of the third sleeve cylinder 233, the second sleeve cylinder 232 is pushed out first when the load is the same. When the second sleeve cylinder 232 reaches a certain position, the third sleeve cylinder 233 is pushed out. After the multi-stage hydraulic cylinder 23 is fully extended, the motor 21 stops rotating according to the running time set by the vehicle controller, and the lock tongue 202 is delivered.

[0082] When the passenger inserts the lock tongue 202 into the buckle, the vehicle controller controls the motor 21 to rotate in the reverse direction, and the hydraulic oil flows out of the oil inlet of the first sleeve cylinder 231. The third sleeve cylinder 233 with a smaller area is retracted first, followed by the second sleeve cylinder 232. When the running time set by the vehicle controller is reached, the motor 21 stops, and the retraction process is completed.

[0083] In an embodiment, as shown in Figure 4 、 Figure 6As shown, the first-stage cylinder 231 includes a first sleeve 2311, a first piston 2312, and a first oil pipe 2313. The first piston 2312 is installed at one end of the first sleeve 2311 near the hydraulic pump 22, and the first oil pipe 2313 is disposed inside the first sleeve 2311. The first piston 2312 is provided with a first oil inlet 23121 and a first oil outlet 23122, and the first oil pipe 2313 is connected to the first oil outlet 23122.

[0084] The hydraulic pump 22 has a first chamber and a second chamber spaced apart from each other. The first chamber is connected to a first oil inlet 23121, and the second chamber is connected to a first oil outlet 23122. When the multi-stage hydraulic cylinder 23 extends, hydraulic oil in the first chamber flows into the multi-stage hydraulic cylinder 23 through the first oil inlet 23121 and flows out into the second chamber through the first oil outlet 23122, forming an oil circulation. When the multi-stage hydraulic cylinder 23 retracts, hydraulic oil in the second chamber flows into the multi-stage hydraulic cylinder 23 through the first oil outlet 23122 and flows out into the first chamber through the first oil inlet 23121, forming an oil circulation.

[0085] In one embodiment, such as Figure 5 , Figure 6 As shown, the secondary sleeve cylinder 232 includes a second sleeve 2321, a second piston 2322, and a second oil pipe 2323. The second piston 2322 is installed at one end of the second sleeve 2321 near the hydraulic pump 22, and the second oil pipe 2323 is disposed inside the second sleeve 2321. The second piston 2322 is provided with a second oil inlet 23221, a second oil outlet 23222, and a first connecting hole 23223. One end of the second oil pipe 2323 is connected to one end of the first connecting hole 23223.

[0086] When the first-stage sleeve cylinder 231 is fitted outside the second-stage sleeve cylinder 232, the second piston 2322 is located inside the first sleeve 2311. One end of the second sleeve 2321 is located inside the first sleeve 2311, and the other end of the second sleeve 2321 extends out from the end of the first sleeve 2311 away from the hydraulic pump 22. The diameter of the second oil pipe 2323 is larger than the diameter of the first oil pipe 2313, and the second oil pipe 2323 is fitted outside the first oil pipe 2313.

[0087] The outer wall surface of the second piston 2322 abuts against the inner wall surface of the first sleeve 2311, and the first positive pressure cavity 2314 is formed between the first piston 2312 and the second piston 2322. Through the first oil inlet 23121, the hydraulic oil can enter the first positive pressure cavity 2314 from the hydraulic pump 22, thereby pushing the second sleeve 2321 to move, so that the second-stage sleeve cylinder 232 can be extended. The gap between the inner wall surface of the first sleeve 2311 and the outer wall surface of the second sleeve 2321 forms an annular first negative pressure cavity 2315, and the hydraulic oil in the first negative pressure cavity 2315 flows out through the second oil outlet 23222 on the second piston 2322.

[0088] The first oil pipe 2313 passes through the first connecting hole 23223 and enters the second oil pipe 2323, and the first sealing ring 2324 is arranged between the outer wall surface of the first oil pipe 2313 and the inner wall surface of the first connecting hole 23223, which can prevent the hydraulic oil in the first positive pressure cavity 2314 from overflowing from the first connecting hole 23223 to the second sleeve 2321.

[0089] In an embodiment, as shown in Figure 6 , the second oil outlet 23222 communicates the first negative pressure cavity 2315 and the first connecting hole 23223, and the position of the second oil outlet 23222 is farther away from the hydraulic pump 22 than the first sealing ring 2324 in the axial direction of the multi-stage hydraulic cylinder 23. Further, the first sealing ring 2324 is arranged at the end of the first connecting hole 23223 close to the hydraulic pump 22, and the opening position of the second oil outlet 23222 in the first connecting hole 23223 is located in the middle of the first connecting hole 23223. Since one end of the second oil pipe 2323 communicates the first connecting hole 23223, and the first oil pipe 2313 passes through the first connecting hole 23223 and enters the second oil pipe 2323, the hydraulic oil in the first negative pressure cavity 2315 can flow out through the second oil outlet 23222, and then enter the gap between the second oil pipe 2323 and the first oil pipe 2313 through the first connecting hole 23223.

[0090] In an embodiment, as shown in Figure 3 , Figure 6 , the third sleeve cylinder 233 includes a third sleeve 2331 and a third piston 2332, the third piston 2332 is installed at the end of the third sleeve 2331 close to the hydraulic pump 22, and the third piston 2332 is provided with a third oil outlet 23321 and a second connecting hole 23322.

[0091] When the secondary sleeve cylinder 232 is sleeved outside the tertiary sleeve cylinder 233, the third piston 2332 is arranged in the second sleeve 2321, one end of the third sleeve 2331 is located in the second sleeve 2321, the other end of the third sleeve 2331 extends out of the second sleeve 2321 from the end of the second sleeve 2321 away from the hydraulic pump 22, and the first oil pipe 2313 and the second oil pipe 2323 pass through the second connecting hole 23322 and enter the third sleeve 2331.

[0092] The outer wall surface of the third piston 2332 abuts against the inner wall surface of the second sleeve 2321, and the second positive pressure cavity 2325 is formed between the third piston 2332 and the second piston 2322. The first positive pressure cavity 2314 and the second positive pressure cavity 2325 are communicated through the second oil inlet 23221, and the hydraulic oil in the first positive pressure cavity 2314 enters the second positive pressure cavity 2325 through the second oil inlet 23221, thereby pushing the third sleeve 2331 to move, so that the tertiary sleeve cylinder 233 can be extended. The gap between the outer wall surface of the third sleeve 2331 and the inner wall surface of the second sleeve 2321 forms an annular second negative pressure cavity 2326, and the hydraulic oil in the second negative pressure cavity 2326 can flow out from the third oil outlet 23321.

[0093] In an embodiment, as shown in Figure 3 、 Figure 6 The third sleeve 2331 is internally provided with a containing cavity 23311, and the second oil pipe 2323 is provided with a second sealing ring 2333 between the outer wall surface of the second oil pipe 2323 and the inner wall surface of the second connecting hole 23322, which can prevent the hydraulic oil in the second positive pressure cavity 2325 from overflowing into the containing cavity 23311 from the second connecting hole 23322.

[0094] In the axial direction of the multi-stage hydraulic cylinder 23, the third oil outlet 23321 is located farther away from the hydraulic pump 22 than the second sealing ring 2333, and further, the second sealing ring 2333 is arranged at the end of the second connecting hole 23322 close to the hydraulic pump 22, and the opening position of the third oil outlet 23321 in the second connecting hole 23322 is located in the middle of the second connecting hole 23322. The hydraulic oil in the second negative pressure cavity 2326 can enter the containing cavity 23311 through the third oil outlet 23321 and the second connecting hole 23322, and then flow back to the hydraulic pump 22 through the first oil pipe 2313 and the first oil outlet 23122.

[0095] When the multi-stage hydraulic cylinder 23 extends, the motor 21 rotates forward, and under the driving of the motor 21, the hydraulic oil in the first cavity of the hydraulic pump 22 enters the first positive pressure cavity 2314 through the first oil inlet 23121. The area of the second piston 2322 is larger than that of the third piston 2332, and the pressure required to push the second piston 2322 is smaller. Therefore, after the hydraulic oil enters the first positive pressure cavity 2314, the second piston 2322 is pushed to move in the first sleeve 2311, the second sleeve 2321 is driven to move, and the second-stage sleeve cylinder 232 is pushed to extend.

[0096] When the second-stage sleeve cylinder 232 moves to the maximum stroke, the hydraulic oil in the first positive pressure cavity 2314 enters the second positive pressure cavity 2325 through the second oil inlet 23221, thereby pushing the third-stage sleeve cylinder 233 to extend.

[0097] During the extension of the second-stage sleeve cylinder 232, the volume of the first positive pressure cavity 2314 gradually increases, and the volume of the first negative pressure cavity 2315 gradually decreases. Under the extrusion of the second piston 2322, the hydraulic oil in the first negative pressure cavity 2315 enters the first connecting hole 23223 through the second oil outlet 23222, then flows into the containing cavity 23311 along the gap between the first oil pipe 2313 and the second oil pipe 2323, and finally flows back to the second cavity of the hydraulic pump 22 through the first oil pipe 2313 and the first oil outlet 23122.

[0098] During the extension of the third-stage sleeve cylinder 233, the volume of the second positive pressure cavity 2325 gradually increases, and the volume of the second negative pressure cavity 2326 gradually decreases. Under the extrusion of the third piston 2332, the hydraulic oil in the second negative pressure cavity 2326 enters the second connecting hole 23322 through the third oil outlet 23321, then enters the containing cavity 23311 along the gap between the second oil pipe 2323 and the second connecting hole 23322, and finally flows back to the second cavity of the hydraulic pump 22 through the first oil pipe 2313 and the first oil outlet 23122.

[0099] When the multi-stage hydraulic cylinder 23 retracts, the motor 21 reverses, and the direction of the flow of the hydraulic oil is exactly opposite. The hydraulic oil in the second cavity of the hydraulic pump 22 enters the containing cavity 23311 through the first oil outlet 23122 and the first oil pipe 2313, the hydraulic oil in the containing cavity 23311 enters the second negative pressure cavity 2326 through the third oil outlet 23321, and the volume of the second negative pressure cavity 2326 gradually increases, thereby driving the third-stage sleeve cylinder 233 to retract. After the third-stage sleeve cylinder 233 moves a certain distance to retract, the hydraulic oil in the containing cavity 23311 enters the first negative pressure cavity 2315 through the gap between the first oil pipe 2313 and the second oil pipe 2323 and the second oil outlet 23222, and the volume of the first negative pressure cavity 2315 gradually increases, thereby driving the second-stage sleeve cylinder 232 to retract.

[0100] In the process of retracting, the hydraulic oil in the first positive pressure cavity 2314 and the second positive pressure cavity 2325 returns to the first cavity of the hydraulic pump 22 through the first oil inlet 23121 and the second oil inlet 23221.

[0101] In an embodiment, as shown in Figure 2 The safety belt delivery device 10 further comprises a bending sleeve 5 connected between the third sleeve 2331 and the lock tongue delivery member 3, so that the opening of the accommodation space 32 faces the passenger, facilitating the passenger to take the lock tongue 202.

[0102] In an embodiment, as shown in Figure 3 The obstacle sensor 37 and the illuminating member 36 are connected through the built-in wire group 6, which sequentially passes through the bending sleeve 5, the third sleeve 2331, the first oil pipe 2313 and the first oil outlet 23122, and finally connects with the outside through the opening on the hydraulic pump 22, so as to control the switch of the illuminating member 36 and the obstacle sensor 37. Among them, the built-in wire group 6 adopts an oil-proof shell to isolate the hydraulic oil.

[0103] Among them, the part of the built-in wire group 6 located in the third sleeve 2331 is spirally arranged, which can compensate for the displacement generated when the safety belt delivery device 10 is extended. When the safety belt delivery device 10 is extended, the spiral segment circuit is lengthened, and when the safety belt delivery device 10 is retracted, the spiral segment circuit is contracted.

[0104] In an embodiment, a sealing member 51 is arranged in the bending sleeve 5, which can prevent the hydraulic oil in the third sleeve 2331 from entering the bending sleeve 5.

[0105] On the other hand, as shown in Figure 7 The safety belt assembly 20 further comprises a buckle, and the lock tongue 202 is detachably connected with the buckle.

[0106] The buckle is provided with a micro switch, which is adapted to be electrically connected with the vehicle controller, and the micro switch can be triggered when the lock tongue 202 is inserted into the buckle.

[0107] After the passenger inserts the lock tongue 202 into the buckle, the micro switch is triggered, and the micro switch transmits a signal to the vehicle controller, and the vehicle controller sends a retracting signal to the motor 21, and the motor 21 reverses to drive the multi-stage hydraulic cylinder 23 to retract.

[0108] Then, the vehicle controller sends a signal to the power controller 4, and the power controller 4 controls the illuminating member 36 to turn off.

[0109] In another aspect, the embodiment of the present application provides a vehicle comprising the seat belt assembly 20 of the above embodiment.

[0110] In another aspect, the embodiment of the present application provides a control method applied to the vehicle of the above embodiment, comprising:

[0111] Obtaining gravity information of the seat;

[0112] According to the gravity information, the vehicle controller controls the driving mechanism 2 to operate, and the driving mechanism 2 drives the lock tongue delivery member 3 to deliver the lock tongue 202 to the passenger.

[0113] The seat is provided with a gravity sensor. After the passenger gets on the vehicle, the gravity sensor is triggered, and a signal is transmitted to the vehicle controller. The vehicle controller controls the motor 21 to rotate forward, and outputs a signal to the obstacle sensor 37 and the lighting member 36, so that the multi-stage hydraulic cylinder 23 extends to send out the lock tongue 202. In addition, the lighting member 36 is turned on to perform a safety belt delivery light reminder, which facilitates the passenger to take the lock tongue 202. In addition, the switch of the obstacle sensor 37 is turned on to ensure the operation of the safety belt delivery device 10.

[0114] In an embodiment, the control method further comprises:

[0115] Obtaining position information of the lock tongue 202;

[0116] According to the position information, the vehicle controller controls the driving mechanism 2 to drive the lock tongue delivery member 3 to reset;

[0117] The position information is the position information when the lock tongue 202 is inserted into the buckle.

[0118] The position information is triggered by a micro switch arranged in the buckle. After the passenger inserts the lock tongue 202 into the buckle, the micro switch is triggered, and the micro switch transmits a signal to the vehicle controller. The vehicle controller controls the driving mechanism 2 to retract and drive the lock tongue delivery member 3 to reset.

[0119] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A belt delivery device for a seat belt assembly, the seat belt assembly comprising a webbing and a latch tongue connected to the webbing, characterized in that, The seat belt delivery device comprises a mounting base, a driving mechanism and a latch tongue delivery member, the mounting base is adapted to be mounted on a vehicle body, the driving mechanism is mounted on the mounting base, and an output end of the driving mechanism is drivingly connected to the latch tongue delivery member; The latch tongue delivery member is used for temporarily fixing a latch tongue of a seat belt assembly, and the driving mechanism can drive the latch tongue delivery member to move towards a vehicle seat to deliver the latch tongue; The latch tongue delivery member is provided with a containing space for containing the latch tongue, and a width of the latch tongue delivery member gradually increases from top to bottom to prevent the latch tongue from leaving the containing space when the latch tongue delivery member moves with the latch tongue.

2. The seat belt delivery device of claim 1, wherein, The seat belt delivery device further comprises a magnetic attraction assembly for connecting the latch tongue delivery member and the latch tongue. The magnetic attraction assembly comprises magnetic attraction members and magnetic force limit buckles which are attracted to each other, one of the magnetic attraction members and the magnetic force limit buckles is arranged on the latch tongue delivery member, and the other is adapted to be arranged on the latch tongue or the webbing of the seat belt assembly.

3. The seat belt delivery device of claim 2, wherein, The magnetic attraction member is arranged on the latch tongue delivery member, and the magnetic force limit buckle is arranged on the latch tongue.

4. The seat belt delivery device of claim 2, wherein, The magnetic attraction member is arranged on the latch tongue delivery member, and the magnetic force limit buckle is arranged on the webbing. When the driving mechanism drives the latch tongue delivery member to move, the latch tongue and the magnetic force limit buckle are relatively stationary.

5. The seat belt delivery device of claim 1, wherein, The latch tongue delivery member comprises first, second and third connecting plates, the first and third connecting plates are oppositely arranged, and the second connecting plate is connected between the first and third connecting plates to define the containing space. The distance between the first and third connecting plates gradually increases from top to bottom.

6. The seat belt delivery device of claim 1, wherein, The driving mechanism comprises a motor, a hydraulic pump and a multi-stage hydraulic cylinder, the motor is connected to the hydraulic pump, the hydraulic pump is connected to the multi-stage hydraulic cylinder, and the motor drives the hydraulic pump to generate hydraulic pressure to make the multi-stage hydraulic cylinder in an elongated state and drive the latch tongue delivery member to move.

7. The seat belt delivery device of claim 6, wherein, The motor is adapted to be electrically connected to a vehicle controller.

8. The seat belt delivery device of claim 6, wherein, The seat belt delivery device further comprises a power supply controller, the power supply controller is mounted on the hydraulic pump, and the power supply controller is adapted to be electrically connected to the vehicle controller.

9. The seat belt delivery device of claim 8, wherein, The latch tongue delivery member is provided with an illuminating member, and the illuminating member is electrically connected to the power supply controller.

10. The seat belt delivery device of claim 1, wherein, An obstacle sensor is arranged at an end of the latch tongue delivery member away from the driving mechanism, and the obstacle sensor is used for sensing an obstacle when the latch tongue delivery member moves. The obstacle sensor is adapted to be electrically connected to the vehicle controller.

11. A seat belt assembly characterized by, The seat belt delivery device comprises a latch tongue, a webbing and any one of the seat belt delivery devices according to claims 1-10.

12. The seat belt assembly of claim 11, wherein, The seat belt delivery device further comprises a buckle, and the latch tongue is detachably connected to the buckle. A micro switch is arranged on the buckle, the micro switch is adapted to be electrically connected to the vehicle controller, and the micro switch can be triggered when the latch tongue is inserted into the buckle.

13. A vehicle characterized by comprising: The seat belt assembly comprises any one of the seat belt delivery devices according to claims 11-12.

14. A control method applied to the vehicle according to claim 13, characterized in that The seat belt delivery device further comprises: Obtaining gravity information of a seat; According to the gravity information, a driving mechanism is controlled to operate to drive a latch tongue delivery member to move to deliver a latch tongue to a passenger.

15. The control method according to claim 14, characterized by, The seat belt delivery device further comprises: Obtaining position information of the latch tongue; According to the position information, the whole vehicle controller controls the driving mechanism to drive the lock tongue delivery piece to return; The position information is the position information when the lock tongue is inserted into the belt buckle.

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