Translation: Translational energy-absorbing mechanism

Abstract

The present application belongs to the field of automobile safety technology, and discloses a translational energy-absorbing mechanism, which comprises a first sliding module, a second sliding module and a first energy-absorbing module. The first sliding module comprises a first sliding rail, a first transmission member, a fixed seat, a first limiting assembly and a second limiting assembly. The end of the fixed seat in the second direction is provided with at least two second protrusions, the second direction is perpendicular to the first direction, the first limiting assembly comprises at least two first protrusions, each first protrusion is located on the circumferential side of the fixed seat in the second direction, and each first protrusion is opposite to each second protrusion, each second protrusion is pressed against the corresponding first protrusion in the direction of the first limiting assembly pointing to the second limiting assembly, the end face where the second protrusion and the first protrusion meet gradually moves away from the fixed seat, and one of the second protrusion and the first protrusion corresponding to each other can be elastically stretched and contracted. In the collision process, the translational energy-absorbing mechanism effectively reduces the relative movement of the torso and the head, and reduces the neck injury of the occupant.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of automobile safety technology, and in particular to a translational energy-absorbing mechanism. BACKGROUND

[0002] Whiplash injury refers to the injury caused by the whiplash movement of the passenger's neck in a rear-end collision, and rear-end collision is one of the most common collision forms on the road. At present, the injury mechanism is not clear, but it is generally believed that reducing the relative movement of the passenger's torso and head can reduce whiplash injury.

[0003] To reduce the harm of whiplash injury to members, common safety technologies in the prior art include:

[0004] 1. Active safety technology for automobiles, which actively adjusts the forward movement of the seat headrest when detecting the collision acceleration, thereby reducing the relative movement of the passenger's head and neck during the collision and reducing the passenger's injury. However, this scheme has complex additional mechanisms, high cost, and large additional mass.

[0005] 2. Seat back reclining structure, which absorbs part of the energy, moves the seat back, changes the seat angle, reduces the tension on the passenger's neck and spine, and thereby reduces injury. In this scheme, the passenger is likely to slide out of the seat back during high-speed rear-end collision, causing other injuries.

[0006] 3. Translational energy-absorbing mechanism based on manually adjustable seat structure. Symmetrically arranged on both sides below the seat cushion, the translational energy-absorbing mechanism includes a lock pin plate, a curved steel sheet cylinder, an energy-absorbing steel sheet, and a traction cylinder. During the collision, the steel sheet around the cylinder is stretched to cause plastic deformation, thereby absorbing energy to reduce passenger injury. However, this scheme is designed based on manually adjustable seat structure. However, at present, most car seats have tended to be electric and intelligent. This translational energy-absorbing mechanism is applied to electric seats, and it is difficult to improve the structure and has poor adaptability. SUMMARY

[0007] The purpose of the present application is to provide a translational energy-absorbing mechanism that can be applied to electrically adjustable seats, effectively reducing the relative movement of the torso and head during the collision, reducing the injury to the passenger's neck, and having a simple structure, easy maintenance, and low cost.

[0008] To achieve this purpose, the present application adopts the following technical solutions:

[0009] The translational energy-absorbing mechanism comprises:

[0010] The first sliding module comprises a first sliding rail, a first transmission member, a fixing base, a first limiting assembly and a second limiting assembly. The first limiting assembly and the second limiting assembly are arranged on the first sliding rail in a first direction, the first direction being parallel to the extension direction of the first sliding rail. One end of the fixing base is pressed against the first limiting assembly, and the other end is pressed against the second limiting assembly. The first transmission member is arranged on the fixing base.

[0011] The second sliding module comprises a second sliding rail and a second transmission member. The second sliding rail is arranged on the first sliding rail in a sliding manner. The second transmission member is arranged on the second sliding rail and is connected in transmission with the first transmission member. The second transmission member is movable relative to the first transmission member to drive the second sliding rail to slide relative to the first sliding rail.

[0012] The first energy-absorbing module comprises a first pressing member, a first energy-absorbing buffer and a first limiting member. The first limiting member is arranged on the first sliding rail and is located on the side of the first limiting assembly away from the second limiting assembly. The first pressing member is arranged on the fixing base. The first energy-absorbing buffer is clamped between the first limiting member and the first pressing member.

[0013] The end of the fixing base in a second direction is provided with at least two second protrusions. The second direction is perpendicular to the first direction. The first limiting assembly comprises at least two first protrusions. Each first protrusion is located on the circumferential side of the fixing base in the second direction and is opposite to each second protrusion. Each second protrusion is pressed against the corresponding first protrusion in the direction of the first limiting assembly pointing to the second limiting assembly. The end faces of the second protrusions and the first protrusions gradually move away from the fixing base. One of the second protrusions and the first protrusions corresponding to each other can be elastically stretched and contracted.

[0014] Optionally, a first sliding groove extending in the first direction is formed in the first sliding rail. The first protrusions are provided with two first protrusions arranged on the two side walls of the first sliding groove respectively. The fixing base is embedded in the first sliding groove. The second protrusions are provided with two second protrusions arranged on the two sides of the fixing base in the second direction.

[0015] Optionally, the first limiting assembly further comprises a locking seat corresponding to each first protrusion. The two locking seats are arranged on the side walls of the first sliding groove respectively. A locking sliding groove is formed in the locking seat. The first protrusion comprises a locking block and a locking spring. The locking block is arranged in the corresponding locking sliding groove in a sliding manner. The locking block can be stretched out of the locking sliding groove and pressed against the second protrusion under the action of the locking spring.

[0016] Optionally,

[0017] The bottom plate of the first chute is provided with a guide slot extending along the first direction, the guide slot penetrating through the bottom plate of the first chute;

[0018] The translational energy-absorbing mechanism further comprises a guide member, the guide member comprising a first end head, a connecting rod and a second end head, the connecting rod being provided through the fixing seat and being slidingly arranged in the guide slot, the first end head being arranged at one end of the connecting rod and being pressed against one side of the fixing seat away from the bottom plate of the first chute, and the second end head being arranged at the other end of the connecting rod and being pressed against one side of the bottom plate of the first chute away from the fixing seat.

[0019] Optionally, the energy-absorbing teeth are provided on both sides of the guide slot, and from the roots to the crests of the energy-absorbing teeth, the energy-absorbing teeth are inclined towards the direction in which the second limiting assembly points to the first limiting assembly.

[0020] Optionally, the first energy-absorbing buffer member comprises a honeycomb block, a plurality of honeycomb holes penetrating through the honeycomb block along the first direction are provided on the honeycomb block, and along the direction in which the second limiting assembly points to the first limiting assembly, the diameters of the honeycomb holes gradually decrease.

[0021] Optionally, the first energy-absorbing buffer member further comprises a shock-absorbing spring extending along the first direction, the shock-absorbing spring being embedded in the honeycomb block, and along the direction in which the second limiting assembly points to the first limiting assembly, the pitches of the shock-absorbing spring gradually decrease.

[0022] Optionally, the first energy-absorbing buffer member comprises a honeycomb block and a driving member, the honeycomb block being rotationally arranged on the first limiting member, the honeycomb block having a plurality of honeycomb portions in the circumferential direction, each of the honeycomb portions being provided with a honeycomb hole with a different diameter, and the output end of the driving member being connected with the honeycomb block, the honeycomb block being capable of rotating under the action of the driving member to selectively make one of the honeycomb portions be directly opposite to the first pressing member.

[0023] Optionally, the first pressing member is a piston, the first energy-absorbing buffer member comprises a cylinder barrel, the cylinder barrel being arranged on the first limiting member, the piston being inserted into the cylinder barrel, and a plurality of air vent holes being provided on the cylinder barrel and being spaced apart along the length direction of the cylinder barrel.

[0024] Optionally, a second energy-absorbing module is further included, the second energy-absorbing module comprises a second pressing piece, a second energy-absorbing buffer and a second limiting piece, the second limiting piece is arranged on the first sliding rail and located on the side of the second limiting assembly away from the first limiting assembly, the second pressing piece is arranged on the fixed seat, and the second energy-absorbing buffer is clamped between the second limiting piece and the second pressing piece; the end of the fixed seat in the second direction is provided with at least two third protrusions, the second limiting assembly comprises at least two fourth protrusions, each third protrusion is located on the circumferential side of the fixed seat in the second direction and opposite to each fourth protrusion, each fourth protrusion is pressed against the corresponding third protrusion in the direction of the second limiting assembly pointing to the first limiting assembly, and the end face of the fourth protrusion and the third protrusion connected with each other gradually moves away from the fixed seat, and one of the fourth protrusion and the third protrusion corresponding to each other can elastically stretch and contract.

[0025] Beneficial effects:

[0026] When the vehicle encounters a collision, a large relative acceleration is generated between the first sliding rail and the second sliding rail due to inertia, so that a large inertial force is generated on the fixed seat relative to the first sliding rail, and the direction of the inertial force is taken as an example in which the second limiting assembly points to the first limiting assembly, under the impact of the inertial force, the second protrusion moves in the first direction to press the first protrusion, and one of the two that can elastically stretch and contract is compressed back, so that the second protrusion slides through the first protrusion, and the first protrusion releases the limiting of the second protrusion, so that the second limiting assembly releases the limiting of the fixed seat, and the fixed seat and the second sliding rail slide synchronously along the first sliding rail, the first pressing piece presses the first energy-absorbing buffer, and the first energy-absorbing buffer buffers and absorbs energy of the fixed seat, thereby effectively reducing the relative movement of the torso and head of the occupant on the second sliding rail, and reducing the injury of the neck of the occupant. When the vehicle does not encounter a collision, the above-mentioned inertial force is difficult to generate, the second protrusion or the first protrusion that can elastically stretch and contract is insufficiently compressed and deformed, the end face of the first protrusion connected with the second protrusion forms a constraint on the second protrusion, and the fixed seat is limited between the first limiting assembly and the second limiting assembly, so as to ensure that the second sliding rail has the front and rear adjusting function compared with the first sliding rail. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a structure schematic view of the translation energy-absorbing mechanism provided by the embodiment of the application;

[0028] Figure 2 is a partial structure schematic view of the translation energy-absorbing mechanism provided by the embodiment of the application;

[0029] Figure 3 is Figure 2 the top view of the translation energy-absorbing mechanism in FIG.

[0030] Figure 4 is Figure 3 is an enlarged schematic view of A in FIG. 1;

[0031] Figure 5 is Figure 2 is a schematic view of the structure of the locking block of the translational energy-absorbing mechanism on the locking seat;

[0032] Figure 6 is Figure 2 is a schematic view of the structure of the guide slot of the translational energy-absorbing mechanism;

[0033] Figure 7 is Figure 2 is a schematic view of the structure of the honeycomb block and the damping spring of the translational energy-absorbing mechanism;

[0034] Figure 8 is another partial schematic view of the translational energy-absorbing mechanism according to an embodiment of the present application;

[0035] Figure 9 is yet another partial schematic view of the translational energy-absorbing mechanism according to an embodiment of the present application.

[0036] in the figure:

[0037] 1. first sliding module; 11. first sliding rail; 111. first sliding slot; 112. bottom plate; 1121. guide slot; 12. first transmission member; 13. fixed seat; 14. first limiting assembly; 141. first protrusion; 1411. locking block; 1412. locking spring; 142. locking seat; 1421. locking sliding slot; 15. second protrusion;

[0038] 2. second sliding rail;

[0039] 3. first energy-absorbing module; 31. first pressure-exerting member; 311. pressure-exerting plate; 312. piston; 32. first energy-absorbing buffer member; 321. honeycomb block; 3211. honeycomb part; 322. damping spring; 323. cylinder; 3231. air vent; 33. first limiting member;

[0040] 4. guide member; 41. first end head; 42. second end head;

[0041] 5. energy-absorbing tooth. DETAILED DESCRIPTION

[0042] The present application will be further described below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application. In addition, it should be noted that, for the convenience of description, only the parts related to the present application are shown in the drawings, but not all the structures.

[0043] In the description of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0044] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0045] In the description of the present embodiment, the terms "up", "down", "right", "left" and other orientation or position relationships are based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0046] As shown in Figure 1 and Figure 2 The present embodiment provides a translational energy absorption mechanism, which specifically comprises a first sliding module 1, a second sliding module and a first energy absorption module 3.

[0047] As shown in Figure 2 and Figure 3As shown, the first sliding module 1 comprises a first sliding rail 11, a first transmission member 12, a fixing base 13, a first limiting assembly 14 and a second limiting assembly, the first limiting assembly 14 and the second limiting assembly are arranged on the first sliding rail 11 in a first direction, the first direction is parallel to the extending direction of the first sliding rail 11, one end of the fixing base 13 is pressed against the first limiting assembly 14, the other end is pressed against the second limiting assembly, and the first transmission member 12 is arranged on the fixing base 13; the second sliding module comprises a second sliding rail 2 and a second transmission member, the second sliding rail 2 is slidingly arranged on the first sliding rail 11, and the second transmission member is arranged on the second sliding rail 2 and is in transmission connection with the first transmission member 12, the second transmission member can move relative to the first transmission member 12 to drive the second sliding rail 2 to slide relative to the first sliding rail 11.

[0048] That is, the first transmission member 12 is arranged on the fixing base 13, one end of the fixing base 13 is pressed against the first limiting assembly 14, and the other end is pressed against the second limiting assembly, so that the first transmission member 12 is relatively fixed with the first sliding rail 11, when the second transmission member moves relative to the first transmission member 12, the second transmission member can drive the second sliding rail 2 to slide relative to the first sliding rail 11. In the embodiment, the first transmission member 12 is a screw rod, the end of the screw rod is bolted to the fixing base 13, when the fixing base 13 is kept stationary, the second transmission member is in screw transmission with the screw rod, and the second transmission member drives the second sliding rail 2 to slide on the first sliding rail 11.

[0049] Referring to Figures 2-4 The end of the fixing base 13 in a second direction is provided with at least two second protrusions 15, the second direction is perpendicular to the first direction, the first limiting assembly 14 comprises at least two first protrusions 141, each first protrusion 141 is located on the circumferential side of the fixing base 13 in the second direction and is opposite to each second protrusion 15, each second protrusion 15 is pressed against the corresponding first protrusion 141 in the direction in which the first limiting assembly 14 points to the second limiting assembly, the end face where the second protrusion 15 and the first protrusion 141 meet gradually moves away from the fixing base 13, and one of the second protrusion 15 and the first protrusion 141 corresponding to each other can elastically stretch and contract.

[0050] In the embodiment, the first sliding rail 11 is fixed on the floor of the automobile and extends along the front-rear direction of the automobile (i.e. the first direction), the first limiting assembly 14 is arranged on the side of the first sliding rail 11 close to the tail of the automobile, the second limiting assembly is arranged on the side of the first sliding rail 11 close to the head of the automobile, and the fixing base 13 is limited by the first limiting assembly 14 and the second limiting assembly. The automobile seat is fixedly connected with the second sliding rail 2, the second sliding rail 2 is slidingly arranged on the first sliding rail 11 and is limited by the first sliding rail 11 to avoid being separated from the first sliding rail 11.

[0051] When the vehicle is hit by a rear-end collision, the car floor accelerates forward, the first slide rail 11 has a greater forward acceleration relative to the fixed seat 13 on it, therefore, the fixed seat 13 has a tendency to move backward compared to the first slide rail 11, the second protrusion 15 extrudes the first protrusion 141, one of them which can elastically stretch and compress is compressed back, causing the second protrusion 15 to slide through the first protrusion 141, the first protrusion 141 is released from the limiting of the second protrusion 15, at this time the fixed seat 13 can drive the second slide rail 2 to slide backward relative to the first slide rail 11. When the vehicle is not hit by a rear-end collision, it is difficult to produce the above acceleration, the inertial force between the second protrusion 15 and the first protrusion 141 is small, the second protrusion 15 or the first protrusion 141 which can elastically stretch and compress is not deformed enough under pressure, the end surface of the first protrusion 141 in contact with the second protrusion 15 forms a constraint on the second protrusion 15, keeping the fixed seat 13 limited between the first limiting assembly 14 and the second limiting assembly, to ensure that the second slide rail 2 has a forward and backward adjustment function compared to the first slide rail 11, to adjust the car seat.

[0052] Referring to Figure 2 and Figure 3 , the first energy absorption module 3 includes a first pressing piece 31, a first energy absorption buffer 32 and a first limiting piece 33, the first limiting piece 33 is arranged on the first slide rail 11 and located on the side of the first limiting assembly 14 away from the second limiting assembly, the first pressing piece 31 is arranged on the fixed seat 13, and the first energy absorption buffer 32 is clamped between the first limiting piece 33 and the first pressing piece 31. After the first limiting assembly 14 unlocks the limiting of the fixed seat 13 due to a collision, the fixed seat 13 and the second slide rail 2 synchronously slide along the first slide rail 11, the first pressing piece 31 presses against the first energy absorption buffer 32, and the first energy absorption buffer 32 buffers and absorbs energy for the fixed seat 13, thereby effectively buffering the relative acceleration of the car seat, reducing the relative movement of the passenger's torso and head, and reducing the damage to the passenger's neck.

[0053] As Figure 3 and Figure 4As shown, optionally, the first sliding rail 11 is provided with a first sliding groove 111 extending in the first direction, the first protrusions 141 are two, and the two first protrusions 141 are arranged on the two side walls of the first sliding groove 111 respectively, and the fixing seat 13 is embedded in the first sliding groove 111, and the second protrusions 15 are two, and the two second protrusions 15 are arranged on the two sides of the fixing seat 13 in the second direction respectively. That is, the two second protrusions 15 on the fixing seat 13 are locked by the first protrusions 141 on the two sides of the first sliding groove 111 respectively, and the two first protrusions 141 are distributed on the two sides of the fixing seat 13 and lock the fixing seat 13 through the end surface connected with the second protrusions 15, thereby improving the stability of the fixing seat 13 in the locking and unlocking process, avoiding the deflection and even the jamming of the fixing seat 13 due to uneven force. In this embodiment, the fixing seat 13 is axisymmetric with the center line of the first sliding groove 111 in the width direction, the two second protrusions 15 are symmetric with the center line of the first sliding groove 111 in the width direction, and the two first protrusions 141 are also symmetric with the center line of the first sliding groove 111 in the width direction. Whether in the normal driving state of the vehicle or in the collision process, the fixing seat 13 is not easy to deflect and fail.

[0054] As shown in Figure 4 and Figure 5 Preferably, the first limiting assembly 14 further comprises a locking seat 142 corresponding to each first protrusion 141, and the two locking seats 142 are arranged on the side walls of the first sliding groove 111 respectively, and the locking seat 142 is provided with a locking sliding groove 1421, the first protrusion 141 comprises a locking block 1411 and a locking spring 1412, the locking block 1411 is slidingly arranged in the corresponding locking sliding groove 1421, and the locking block 1411 can extend out of the locking sliding groove 1421 and press against the second protrusion 15 under the action of the locking spring 1412. Specifically, the locking seat 142 is integrally formed on the first sliding rail 11 and protrudes from the inner side wall of the first sliding groove 111 to the inside of the first sliding groove 111 in the second direction, the fixing seat 13 is located between the two locking seats 142, the locking seat 142 is provided with a locking sliding groove 1421 extending in the second direction, the locking spring 1412 compressed by the locking block 1411 is accommodated in the locking sliding groove 1421, and the locking block 1411 is slidingly inserted in the locking sliding groove 1421. Under the elastic force of the locking spring 1412, the locking block 1411 has a tendency to move out of the locking sliding groove 1421, thereby pressing against the corresponding second protrusion 15, so as to realize the locking of the fixing seat 13.

[0055] As shown in Figure 2 and Figure 6As shown, optionally, the bottom plate 112 of the first chute 111 is provided with a guide groove 1121 extending along the first direction, the guide groove 1121 penetrating through the bottom plate 112 in the thickness direction of the bottom plate 112; the translational energy-absorbing mechanism further comprises a guide member 4, the guide member 4 comprising a first end head 41, a connecting rod and a second end head 42, the connecting rod being provided through the fixing seat 13 and being slidingly arranged in the guide groove 1121, the first end head 41 being arranged at one end of the connecting rod and being pressed against one side of the fixing seat 13 away from the bottom plate 112 of the first chute 111, and the second end head 42 being arranged at the other end of the connecting rod and being pressed against one side of the bottom plate 112 of the first chute 111 away from the fixing seat 13. The guide member 4 can not only lock the fixing seat 13 on the first sliding rail 11, but also cooperate with and guide the fixing seat 13 to slide when the automobile is subjected to a rear-end collision, so as to avoid dislocation of the fixing seat 13, make the first pressing member 31 push the first energy-absorbing buffer 32, and thus achieve the effect of reducing the impact.

[0056] As shown in the drawings, Figure 6 Optionally, the guide groove 1121 is provided with energy-absorbing teeth 5 on both sides, the energy-absorbing teeth 5 being inclined to the direction in which the second limiting assembly points to the first limiting assembly 14 from the tooth root to the tooth top of the energy-absorbing teeth 5. In this embodiment, the energy-absorbing teeth 5 are in the form of steel sheets. As shown in the drawings, a plurality of energy-absorbing teeth 5 are arranged along the first direction, the energy-absorbing teeth 5 in contact with the connecting rod being elastically deformed under extrusion when the connecting rod slides in the guide groove 1121, absorbing the impact potential energy generated by the connecting rod, gradually buffering and reducing the speed of the connecting rod, and playing an auxiliary energy-absorbing role on the first energy-absorbing buffer 32.

[0057] In one embodiment, as shown in the drawings, Figure 2 and Figure 7 The first energy-absorbing buffer 32 comprises a honeycomb block 321, a plurality of honeycomb holes penetrating through along the first direction being provided in the honeycomb block 321, and the aperture of each honeycomb hole gradually decreases along the direction in which the second limiting assembly points to the first limiting assembly 14. With the decrease of the aperture of the honeycomb hole, the compression resistance of the honeycomb block 321 gradually increases. That is, the part of the honeycomb block 321 close to the first pressing member 31 can be designed as a large-aperture honeycomb, the strength of this part of the honeycomb block 321 being relatively low, a smaller platform force and energy-absorbing effect being provided to cope with low-speed collision. The part of the honeycomb block 321 close to the first limiting member 33 can be designed as a small-aperture honeycomb, the strength of this part of the honeycomb block 321 being relatively high, a larger platform force and energy-absorbing effect being provided to cope with high-speed collision. In this embodiment, the first pressing member 31 is a pressing plate 311, and the first limiting member 33 is a limiting plate, the contact area of the honeycomb block 321 being relatively large. After collision, the honeycomb block 321 is crushed due to impact, and a new honeycomb block 321 can be replaced, without the need to replace other components of the translational energy-absorbing mechanism, so that the maintenance cost is low.

[0058] Further, as shown in the drawings, Figure 7As shown, the first energy-absorbing buffer 32 further comprises a shock-absorbing spring 322 extending in the first direction, the shock-absorbing spring 322 is embedded in the honeycomb block 321, and the pitch of the shock-absorbing spring 322 gradually decreases in the direction of the second limiting component pointing to the first limiting component 14. That is, the shock-absorbing spring 322 is placed in the honeycomb block 321 with holes, and the stiffness of different regions of the shock-absorbing spring 322 is achieved by designing the pitch of the shock-absorbing spring 322 in the first direction. In a low-speed collision, the part of the shock-absorbing spring 322 close to the first pressing component 31 has small stiffness, and the shock-absorbing spring 322 cooperates with the honeycomb block 321 to provide small energy absorption; in a high-speed collision, the part of the shock-absorbing spring 322 close to the first limiting component 33 has large stiffness, and the shock-absorbing spring 322 cooperates with the honeycomb block 321 to provide large energy absorption. Alternatively, the shock-absorbing spring 322 and the honeycomb block 321 can also be designed with different materials in the first direction to achieve the variable stiffness design of the honeycomb block 321 and the shock-absorbing spring 322.

[0059] In another embodiment, as shown in Figure 8 The first energy-absorbing buffer 32 comprises a honeycomb block 321 and a driving component, the honeycomb block 321 is rotationally arranged on the first limiting component 33, the honeycomb block 321 has a plurality of honeycomb portions 3211 in the circumferential direction, each honeycomb portion 3211 is provided with a honeycomb hole with different hole diameters, and the output end of the driving component is connected with the honeycomb block 321. The honeycomb block 321 can be rotated under the action of the driving component to selectively make one of the honeycomb portions 3211 face the first pressing component 31. Specifically, the driving component is controlled by an automobile active safety module, the automobile active safety module predicts the collision speed of the automobile according to the speed of the automobile before the collision, and the automobile active safety module controls the driving component to drive the honeycomb block 321 to rotate, so that different honeycomb portions 3211 face the first pressing component 31, and other honeycomb portions 3211 are out of position with the first pressing component 31. Since different honeycomb portions 3211 have different hole diameters and thus different strengths, different honeycomb portions 3211 can provide different energy-absorbing effects under different collision speeds. Combined with active safety technology, the energy-absorbing and buffering effect of the translational energy-absorbing mechanism can be further improved. The automobile active safety module mentioned in this embodiment uses the active safety module in the prior art, and the specific structure and principle are not described here. In this embodiment, the driving component is a motor, and the first pressing component 31 is a pressing plate 311. The output shaft of the motor is arranged offset from the pressing plate 311 in the second direction, so that part of the honeycomb portions 3211 of the honeycomb block 321 are offset from the pressing plate 311.

[0060] In yet another embodiment, as shown in Figure 9As shown, the first pressing member 31 is a piston 312, and the first energy-absorbing buffer 32 includes a cylinder barrel 323 arranged on the first limiting member 33, and the piston 312 is inserted into the cylinder barrel 323. A plurality of air vent holes 3231 are arranged on the cylinder barrel 323 along the length direction of the cylinder barrel 323. In this embodiment, the piston 312 is in sealing connection with the cylinder barrel 323 through a sealing ring. When the vehicle collides at a low speed, the compression rate of the piston 312 is low, the compression stroke is short, and the time is long. The number of the air vent holes 3231 on the cylinder barrel 323 for air vent is relatively large, the air vent efficiency is high, the air pressure in the cylinder barrel 323 is relatively small, and a small platform force is provided. When the vehicle collides at a high speed, the compression rate of the piston 312 is high, the compression stroke is long, and the time is short. The number of the air vent holes 3231 on the cylinder barrel 323 for air vent is relatively small, the air vent efficiency is low, the air pressure in the cylinder barrel 323 is relatively large, and a large platform force is provided by the cylinder barrel 323. Optionally, the first energy-absorbing buffer 32 further includes an air pump controlled by a vehicle active safety module. The vehicle active safety module predicts the collision speed of the vehicle according to the speed of the vehicle before the collision, and controls the air pump to adjust the initial pressure in the cylinder barrel 323, so as to provide different energy-absorbing platform forces under different collision speeds. In combination with the active safety technology, the energy-absorbing buffering effect of the translational energy-absorbing mechanism can be further improved. The vehicle active safety module adopts the active safety module in the prior art, and the specific structure and principle are not described herein.

[0061] To realize the energy-absorbing buffering effect of the translational energy-absorbing mechanism in the front and rear directions, optionally, the end of the fixed seat 13 in the second direction is provided with at least two third protrusions, the second limiting assembly includes at least two fourth protrusions, each third protrusion is located on the circumferential side of the fixed seat 13 in the second direction and is opposite to each fourth protrusion, each fourth protrusion is pressed against the corresponding third protrusion, the end face of the fourth protrusion and the third protrusion gradually away from the fixed seat 13 in the direction of the second limiting assembly pointing to the first limiting assembly 14, one of the fourth protrusion and the third protrusion corresponding to each other can be elastically stretched and contracted, and the translational energy-absorbing mechanism further includes a second energy-absorbing module. The second energy-absorbing module includes a second pressing member, a second energy-absorbing buffer and a second limiting member. The second limiting member is arranged on the first sliding rail 11 and located on the side of the second limiting assembly away from the first limiting assembly 14. The second pressing member is arranged on the fixed seat 13, and the second energy-absorbing buffer is arranged between the second limiting member and the second pressing member.

[0062] Specifically, when the vehicle rear-ends other vehicles, the acceleration direction of the car floor is backward, the first slide rail 11 has a greater backward acceleration relative to the fixed seat 13 thereon, therefore, the fixed seat 13 has a tendency of moving forward relative to the first slide rail 11, the third protrusion presses the fourth protrusion forward, one of the two that can elastically stretch and contract is compressed back, causing the third protrusion to slide forward through the fourth protrusion, the fourth protrusion is thus released from limiting the third protrusion, at this time, the fixed seat 13 can drive the second slide rail 2 to slide forward relative to the first slide rail 11. When the vehicle is not hit, the above acceleration is difficult to occur, the inertial force between the third protrusion and the fourth protrusion is small, the third protrusion or the fourth protrusion that can elastically stretch and contract is not deformed enough under pressure, the end surface of the third protrusion and the fourth protrusion forms a constraint on the third protrusion, keeping the fixed seat 13 limited between the first limiting assembly 14 and the second limiting assembly, to ensure that the second slide rail 2 has a forward and backward adjustment function relative to the first slide rail 11, to adjust the car seat.

[0063] After the forward rear-end causes the second limiting assembly to unlock the limitation of the fixed seat 13, the fixed seat 13 and the second slide rail are synchronously slid along the first slide rail 11, the second pressure piece presses against the second energy-absorbing buffer piece, and the second energy-absorbing buffer piece buffers and absorbs energy of the fixed seat 13, thereby effectively reducing the relative movement of the passenger's torso and head and reducing the damage to the passenger's neck. The specific structure and working principle of the second energy-absorbing module can be designed with reference to the first energy-absorbing module 3, which will not be repeated here.

[0064] Obviously, the above embodiments of the present application are only examples for clarity, and are not intended to limit the embodiments of the present application. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of the present application. Here, it is not necessary and impossible to exhaust all the embodiments. Any modification, equivalent substitution and improvement within the spirit and principles of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A translational energy absorbing mechanism, characterized by, include: The first sliding module (1) includes a first slide rail (11), a first transmission component (12), a fixed seat (13), a first limiting component (14), and a second limiting component. The first limiting component (14) and the second limiting component are spaced apart on the first slide rail (11) along a first direction, which is parallel to the extension direction of the first slide rail (11). One end of the fixed seat (13) presses against the first limiting component (14), and the other end presses against the second limiting component. The first transmission component (12) is disposed on the fixed seat (13). The second sliding module includes a second slide rail (2) and a second transmission component. The second slide rail (2) is slidably disposed on the first slide rail (11). The second transmission component is disposed on the second slide rail (2) and is connected to the first transmission component (12). The second transmission component can move relative to the first transmission component (12) to drive the second slide rail (2) to slide relative to the first slide rail (11). The first energy-absorbing module (3) includes a first pressing member (31), a first energy-absorbing buffer member (32) and a first limiting member (33). The first limiting member (33) is disposed on the first slide rail (11) and is located on the side of the first limiting component (14) away from the second limiting component. The first pressing member (31) is disposed on the fixed base (13). The first energy-absorbing buffer member (32) is sandwiched between the first limiting member (33) and the first pressing member (31). The fixed base (13) has at least two second protrusions (15) at its end in the second direction, which is perpendicular to the first direction. The first limiting component (14) includes at least two first protrusions (141). Each first protrusion (141) is located on the periphery of the fixed base (13) in the second direction and is opposite to each of the second protrusions (15). Each second protrusion (15) presses against the corresponding first protrusion (141). Along the direction from the first limiting component (14) to the second limiting component, the end faces of the second protrusions (15) and the first protrusions (141) that are in contact gradually move away from the fixed base (13). One of the corresponding second protrusions (15) and the first protrusions (141) can elastically extend and retract.

2. The translational energy absorption mechanism of claim 1, wherein, The first slide rail (11) has a first slide groove (111) extending along the first direction. There are two first protrusions (141), which are respectively disposed on the two side walls of the first slide groove (111). The fixed seat (13) is embedded in the first slide groove (111). There are two second protrusions (15), which are respectively disposed on both sides of the fixed seat (13) in the second direction.

3. The translational energy absorption mechanism of claim 2, wherein, The first limiting assembly (14) further comprises a locking seat (142) corresponding to each first protrusion (141), two locking seats (142) are respectively arranged on the side walls of the first sliding groove (111), a locking sliding groove (1421) is arranged on the locking seat (142), the first protrusion (141) comprises a locking block (1411) and a locking spring (1412), the locking block (1411) is slidingly arranged in the corresponding locking sliding groove (1421), and the locking block (1411) can extend out of the locking sliding groove (1421) and abut against the second protrusion (15) under the action of the locking spring (1412).

4. The translational energy absorption mechanism according to claim 2, characterized in that, A guide groove (1121) extending in the first direction is arranged on the bottom plate (112) of the first sliding groove (111), and the guide groove (1121) penetrates through the bottom plate (112) of the first sliding groove (111); The translational energy absorption mechanism further comprises a guide (4), the guide (4) comprises a first end head (41), a connecting rod and a second end head (42), the connecting rod is arranged through the fixing seat (13) and slidingly arranged in the guide groove (1121), the first end head (41) is arranged at one end of the connecting rod and abuts against one side of the fixing seat (13) away from the bottom plate (112) of the first sliding groove (111), and the second end head (42) is arranged at the other end of the connecting rod and abuts against one side of the bottom plate (112) of the first sliding groove (111) away from the fixing seat (13).

5. The translational energy absorption mechanism of claim 4, wherein, Energy absorption teeth (5) are arranged on both sides of the guide groove (1121), and the energy absorption teeth (5) are inclined to the direction in which the first limiting assembly (14) is directed by the second limiting assembly from the tooth root to the tooth top of the energy absorption teeth (5).

6. The translational energy absorption mechanism according to any one of claims 1-4, wherein, The first energy absorption buffer (32) comprises a honeycomb block (321), a plurality of honeycomb holes penetrating through in the first direction are arranged on the honeycomb block (321), and the hole diameter of each honeycomb hole gradually decreases in the direction in which the first limiting assembly (14) is directed by the second limiting assembly.

7. The translational energy absorption mechanism of claim 6, wherein, The first energy absorption buffer (32) further comprises a shock absorbing spring (322) extending in the first direction, the shock absorbing spring (322) is embedded in the honeycomb block (321), and the pitch of the shock absorbing spring (322) gradually decreases in the direction in which the first limiting assembly (14) is directed by the second limiting assembly.

8. The translational energy absorption mechanism of any one of claims 1-4, wherein, The first energy-absorbing buffer (32) comprises a honeycomb block (321) and a driving member, the honeycomb block (321) is rotationally arranged on the first limiting member (33), the honeycomb block (321) has a plurality of honeycomb portions (3211) in the circumferential direction, each of the honeycomb portions (3211) is respectively provided with a honeycomb hole with different aperture, the output end of the driving member is connected with the honeycomb block (321), and the honeycomb block (321) can rotate under the action of the driving member to selectively make one of the honeycomb portions (3211) face the first pressing member (31).

9. The translational energy absorption mechanism according to any one of claims 1-4, wherein, The first pressing member (31) is a piston (312), the first energy-absorbing buffer (32) comprises a cylinder barrel (323), the cylinder barrel (323) is arranged on the first limiting member (33), the piston (312) is inserted into the cylinder barrel (323), and a plurality of air release holes (3231) are arranged on the cylinder barrel (323) and spaced apart along the length direction of the cylinder barrel (323).

10. The translational energy absorption mechanism according to any one of claims 1-4, wherein, The second energy-absorbing module comprises a second pressing member, a second energy-absorbing buffer and a second limiting member, the second limiting member is arranged on the first sliding rail (11) and located on the side, away from the first limiting assembly (14), of the second limiting assembly, the second pressing member is arranged on the fixed seat (13), and the second energy-absorbing buffer is clamped between the second limiting member and the second pressing member. The end of the fixed seat (13) in the second direction is provided with at least two third protrusions, the second limiting assembly comprises at least two fourth protrusions, each of the third protrusions is located on the circumferential side of the fixed seat (13) in the second direction and is opposite to each of the fourth protrusions, each of the fourth protrusions is pressed against the corresponding third protrusion, the end face, at which the fourth protrusion and the third protrusion are connected, gradually moves away from the fixed seat (13) in the direction in which the second limiting assembly points to the first limiting assembly (14), and one of the fourth protrusion and the third protrusion corresponding to each other can elastically stretch and contract.

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