Locking mechanism and automobile

Abstract

The present invention discloses a locking mechanism and a car, the locking mechanism comprising: a main locking assembly, the main locking assembly comprising a first rotating block and a second rotating block that are rotatably matched, a first locking tooth piece and a first handle connected to the second rotating block, a second locking tooth piece matched to the first locking tooth piece, a first return spring provided on the first locking tooth piece and the second locking tooth piece, and a first pin shaft connected to the first rotating block, the second rotating block, the first locking tooth piece, the second locking tooth piece and the first return spring for connection and limiting. The locking mechanism of the present invention adopts a return spring as one of the locking elements, which is not only simple in process, does not require additional customization, and is low in cost, but also has higher reliability, higher utilization, compact structure, and higher integration.

Description

Technical Field

[0001] The invention relates to the technical field of automobiles, and in particular to a locking mechanism and an automobile. Background Art

[0002] With the development of China's automobile industry, the design of steering systems is becoming more and more humanized. In order to meet the needs of people with different heights and driving habits, improve the comfort of vehicle driving, and to a certain extent reduce traffic accidents caused by fatigue caused by uncomfortable steering wheel position during driving, the adjustment of the steering wheel has become a standard configuration of cars nowadays. The traditional locking mechanism of the steering column for adjusting the steering wheel uses a spring leaf as a locking element, but in order to avoid failure caused by stress relaxation, the processing process of the above-mentioned spring leaf is relatively complicated and costly. Summary of the invention

[0003] Based on this, the present invention aims to overcome the defects of the spring leaf of the locking mechanism in the prior art, such as the complex processing technology and high cost, and provide a locking mechanism and a car.

[0004] The technical solution is as follows:

[0005] A locking mechanism comprises: a main locking assembly, wherein the main locking assembly comprises a first rotating block and a second rotating block that are rotatably matched, a first locking tooth piece and a first handle connected to the second rotating block, a second locking tooth piece that matches the first locking tooth piece, a first return spring that is arranged on the first locking tooth piece and the second locking tooth piece, and a first pin shaft that is passed through and connected to the first rotating block, the second rotating block, the first locking tooth piece, the second locking tooth piece and the first return spring; the first rotating block comprises a first turning platform and a first convex portion arranged on the first turning platform, the second turning block comprises a second turning platform, a hollow portion that is arranged on the second turning platform and matches with the first convex portion, and a second convex portion that is arranged on the second turning platform and matches with the first locking tooth piece, the second convex portion is arranged on the second turning platform on a side away from the first turning block, and the second convex portion is engaged with the first handle; the first locking tooth piece is provided with a third convex portion that matches with the second convex portion.

[0006] The locking mechanism of the technical solution is used in conjunction with the steering column to connect the locking mechanism to the steering column. The locking mechanism of the technical solution uses a reset spring as one of the locking elements, which is not only simple in process, does not require additional customization, and is low in cost, but also has higher reliability, higher utilization, compact structure, and higher integration. Specifically, when in the locked state, the first convex portion and the hollow portion are not fully matched, and the second convex portion and the third convex portion are docked and matched, so that the first reset spring is compressed, the first locking tooth piece is pressed and bitten on the second locking tooth piece, and the locking is completed. When it is necessary to unlock to adjust the position of the steering column, the first handle is rotated, thereby driving the second rotating block connected to the first handle to rotate, the second convex portion of the second rotating block is separated from the docking with the third convex portion, and due to the reset tension of the reset spring, the first convex portion is completely inserted into the hollow portion, and the second convex portion is located at the adjacent position of the third convex portion, that is, similar to the form of interlacing or interlocking. At this time, the reset spring separates the first locking tooth piece and the second locking tooth piece, that is, the unlocking is completed, and the position of the steering column can be adjusted. When it is necessary to lock again, the first handle only needs to be rotated in the opposite direction to return it to the position when locked. This technical solution increases the reset tension and reset stroke of the first reset spring through the double safety cooperation of the first convex part and the hollow part, and the second convex part and the third convex part, thereby further ensuring the locking effect and unlocking effect.

[0007] In one embodiment, the first protrusion includes a first boss and a first slide connected to the first boss and having a slope, and the highest point of the first slide is connected to the first boss; and / or the third protrusion includes a third boss and a third slide connected to the third boss and having a slope, and the highest point of the third slide is connected to the third boss.

[0008] In one embodiment, the first turning platform and the second turning platform are both circular blocks, there are at least two first convex portions and at least two hollow portions, and the first convex portions and the hollow portions correspond to each other one by one, the first convex portions are evenly spaced along the circumferential direction of the first turning platform, and the hollow portions are evenly spaced along the circumferential direction of the second turning platform.

[0009] In one of the embodiments, it also includes a third locking tooth plate and a fourth locking tooth plate which are sleeved on the first pin shaft and cooperate with each other, and a second return spring arranged between the third locking tooth plate and the fourth locking tooth plate; the arrangement direction of the engaging teeth on the third locking tooth plate and the fourth locking tooth plate is set at an angle to the arrangement direction of the engaging teeth on the first locking tooth plate and the second locking tooth plate.

[0010] In one of the embodiments, a first crush energy absorbing member connected to the third locking tooth plate is also included.

[0011] In one of the embodiments, the third locking tooth piece is a rectangular tooth piece, and the first crush energy absorbing member is a "J" shaped steel wire.

[0012] In one of the embodiments, it also includes a first transition bracket connected to the main locking assembly, a secondary locking assembly spaced apart from the main locking assembly, and a second transition bracket connected to the secondary locking assembly; the first transition bracket and the second transition bracket are connected via a transition portion.

[0013] In one of the embodiments, a column elastic sheet is provided on the transition portion, and the tension direction of the column elastic sheet is perpendicular to the axial direction of the steering column.

[0014] In one embodiment, the secondary locking assembly includes a second handle, an auxiliary crush block, and a second crush energy absorbing member connected to the auxiliary crush block, and the second handle and the auxiliary crush block are connected by a second pin shaft.

[0015] The technical solution also provides a car, the car includes a steering column and a locking mechanism as described in any one of the above, the locking mechanism cooperates with the steering column. The car of the technical solution adopts the above locking mechanism, which is not only simple in process, does not require additional customization, and is low in cost, but also has higher reliability, higher utilization, compact structure, and higher integration. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the locking mechanism according to an embodiment of the present invention;

[0017] Figure 2 This is a schematic diagram of the locking mechanism in use according to an embodiment of the present invention;

[0018] Figure 3 for Figure 1 An exploded diagram of the middle main locking assembly;

[0019] Figure 4 It is a partial cooperation schematic diagram of the locking state of the locking mechanism according to the embodiment of the present invention;

[0020] Figure 5 for Figure 4 Schematic diagram of local coordination in the unlocked state;

[0021] Figure 6 for Figure 4 A schematic structural diagram of the first rotating block;

[0022] Figure 7 for Figure 4 A schematic diagram of the structure of the second rotating block;

[0023] Figure 8 for Figure 4 A schematic diagram of the structure of the first locking tooth piece;

[0024] Fig. 9 for Figure 3 A schematic diagram of the structure of the first crush energy absorbing member;

[0025] Fig.10 for Figure 1 An exploded diagram of the middle secondary locking assembly;

[0026] Fig.11 for Figure 1 Schematic diagram of the structure of the second crush energy absorbing member.

[0027] Description of reference numerals:

[0028] 100, main locking assembly; 10, first rotating block; 11, first turning platform; 12, first convex portion; 121, first convex platform; 122, first slide; 20, second rotating block; 21, second turning platform; 22, hollow portion; 23, second convex portion; 30, first locking tooth piece; 31, third convex portion; 311, third convex platform; 312, third slide; 40, second locking tooth piece; 50, first handle; 60, first return spring; 70, first pin shaft; 80, third locking tooth piece; 81, first collapse energy absorbing member; 811, friction fit section; 812, penetration section; 813, arc section; 82, first gasket; 90, fourth locking tooth plate; 91, second return spring; 200, first transition bracket; 300, auxiliary locking assembly; 310, second handle; 320, auxiliary collapse block; 330, second collapse energy absorbing member; 331, auxiliary matching section; 332, connecting section; 340, second pin shaft; 350, third rotating block; 360, fourth rotating block; 370, second gasket; 400, second transition bracket; 500, transition portion; 510, column elastic sheet; 600, steering column. DETAILED DESCRIPTION

[0029] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.

[0030] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0032] The “first” and “second” mentioned in the present invention do not represent specific quantities and orders, but are merely used to distinguish names.

[0033] like Figure 1-Figure 5 The locking mechanism shown in the figure comprises: a main locking assembly 100, the main locking assembly 100 comprises a first rotating block 10 and a second rotating block 20 which are rotatably matched, a first locking tooth piece 30 and a first handle 50 connected to the second rotating block 20, a second locking tooth piece 40 which is matched with the first locking tooth piece 30, a first return spring 60 arranged on the first locking tooth piece 30 and the second locking tooth piece 40, and a first pin 70 which is passed through and connected to the first rotating block 10, the second rotating block 20, the first locking tooth piece 30, the second locking tooth piece 40 and the first return spring 60; the first rotating block 10 comprises a first turning platform 11 and a first protrusion 12 disposed on the first turning platform 11, the second rotating block 20 comprises a second turning platform 21, a hollow portion 22 disposed on the second turning platform 21 and cooperating with the first protrusion 12, and a second protrusion 23 disposed on the second turning platform 21 and cooperating with the first locking tooth piece 30, the second protrusion 23 is disposed on the second turning platform 21 away from the first turning block, and the second protrusion 23 is engaged with the first handle 50; the first locking tooth piece 30 is provided with a third protrusion 31 cooperating with the second protrusion 23. That is, the first locking tooth piece 30 and the first rotating block 10 are respectively located at two opposite sides of the second rotating block 20, and since the above elements are all integrated and assembled on the first pin 70, the bite locking relationship between the first locking tooth piece 30 and the second locking tooth piece 40 can be adjusted through the cooperation between the first rotating block 10 and the second rotating block 20, and the cooperation between the second rotating block 20 and the first locking tooth piece 30.

[0034] The locking mechanism of this embodiment is used in conjunction with the steering column 600 to connect the locking mechanism to the steering column 600. The locking mechanism of this technical solution uses a return spring as one of the locking elements, which is not only simple in process, does not require additional customization, and is low in cost, but also has higher reliability, higher utilization, compact structure, and higher integration. Specifically, when in the locked state, the first protrusion 12 is not fully matched with the hollow portion 22, and the second protrusion 23 is docked with the third protrusion 31, so that the first return spring 60 is compressed, and the first locking tooth plate 30 is pressed and bitten on the second locking tooth plate 40 to complete the locking. When the position of the steering column 600 needs to be unlocked to adjust the position of the steering column 600, the first handle 50 is rotated, thereby driving the second rotating block 20 connected to the first handle 50 to rotate, and the second protrusion 23 of the second rotating block 20 is separated from the docking with the third protrusion 31, and due to the reset tension of the reset spring, the first protrusion 12 is completely inserted into the hollow portion 22, and the second protrusion 23 is located at the adjacent position of the third protrusion 31, that is, similar to the form of insertion or interlocking. At this time, the reset spring separates the first locking tooth plate 30 and the second locking tooth plate 40, that is, the unlocking is completed, and the position of the steering column 600 can be adjusted. When it is necessary to lock again, it is only necessary to rotate the first handle 50 in the opposite direction to return it to the position relationship when it was locked. In this embodiment, through the double insurance cooperation of the first protrusion 12 and the hollow portion 22, and the second protrusion 23 and the third protrusion 31, the reset tension and reset stroke of the first reset spring 60 are increased, thereby further ensuring the locking effect and unlocking effect.

[0035] like Figure 6-Figure 8As shown, in this embodiment, the first convex portion 12 includes a first boss 121 and a first slide 122 connected to the first boss 121 and having a slope, the highest point of the first slide 122 docks with the first convex portion 121, and the lowest point of the first slide 122 docks with the first turning platform 11. When the locking mechanism is in the locked state, the first slide 122 is not inserted into the hollow portion 22, and the connection between the first boss 121 and the first slide 122 serves as a limit portion in the locked state, and cooperates with the edge of the hollow portion 22 as an extreme position to prevent the first handle 50 from not rotating in place or rotating too far when turning from the unlocked state to the locked state. At this time, the overall width of the first rotating block 10 and the second rotating block 20 reaches the maximum, thereby providing a compression force for the first return spring 60, so that the first locking tooth piece 30 and the second locking tooth piece 40 are engaged and locked. When unlocking is required, the first handle 50 is rotated to allow the first protrusion 12 to be completely inserted into the hollow portion 22. At this time, the overall width of the first rotating block 10 and the second rotating block 20 is minimized, thereby making way for the first reset spring 60 to reset, so that the first locking tooth piece 30 and the second locking tooth piece 40 are disengaged, and unlocking is completed. Since the first slide 122 has a slope, the cooperation between the first slide 122 and the wall surface of the second turning platform 20 during rotation can provide a transition guide for the first protrusion 12 to be completely inserted into the hollow portion 22, thereby avoiding excessive impact force during unlocking or locking, which may cause vibration of the locking mechanism and affect the user experience and service life.

[0036] Similarly, the third protrusion 31 has the same structure and principle as the first protrusion 12. The third protrusion 31 includes a third boss 311 and a third slide 312 connected to the third boss 311 and having a slope. The third slide 312 is docked with the third boss 311 at its highest point.

[0037] In this embodiment, the first turning platform 11 and the second turning platform 21 are both circular blocks, and there are at least two first convex parts 12 and the hollow parts 22, and the first convex parts 12 and the hollow parts 22 correspond to each other one by one, the first convex parts 12 are evenly spaced along the circumferential direction of the first turning platform 11, and the hollow parts 22 are evenly spaced along the circumferential direction of the second turning platform 21. In this embodiment, the number of the hollow parts 22 and the first convex parts 12 is three, and the hollow parts 22 are fan-shaped, the cross-sectional shape of the first convex part 12 matches the shape of the hollow parts 22, and the arc length of the hollow parts 22 matches the arc length of the first convex part 12, so that when in the unlocked state, the edge of the hollow part 22 has a limiting effect on the first convex part 12, preventing the first handle 50 from rotating inadequately or over-rotating.

[0038] In order to achieve four-way adjustment of the steering column 600 and enhance the integration effect of this embodiment, this embodiment also includes a third locking tooth plate 80 and a fourth locking tooth plate 90 which are sleeved on the first pin shaft 70 and cooperate with each other, and a second return spring 91 arranged between the third locking tooth plate 80 and the fourth locking tooth plate 90; the arrangement direction of the engaging teeth on the third locking tooth plate 80 and the fourth locking tooth plate 90 is set at an angle to the arrangement direction of the engaging teeth on the first locking tooth plate 30 and the second locking tooth plate 40. That is, the adjustment directions of the first locking tooth plate 30 and the second locking tooth plate 40 for the steering column 600 are set at an angle to the adjustment directions of the third locking tooth plate 80 and the fourth locking tooth plate 90 for the steering column 600. Therefore, the adjustment directions of the third locking tooth plate 80 and the fourth locking tooth plate 90 are different from the adjustment directions of the first locking tooth plate 30 and the second locking tooth plate 40, thereby realizing the four-way adjustment of the steering column 600 up, down, front and back, with higher integration and better ability to meet the needs of the driver.

[0039] Specifically, in this embodiment, the first locking tooth piece 30 and the second locking tooth piece 40 are used to adjust the up and down position of the steering column 600, and the third locking tooth piece 80 and the fourth locking tooth piece 90 are used to adjust the front and rear position of the steering column 600. In addition, the number of the engaging teeth on the first locking tooth piece 30, the second locking tooth piece 40, the third locking tooth piece 80 and the fourth locking tooth piece 90 is multiple, so as to ensure the adjustment range and meet the needs of more drivers.

[0040] Since the third locking tooth plate 80 and the fourth locking tooth plate 90 described in this embodiment are used for adjusting the front and rear position of the steering column 600, in order to improve the integration of this embodiment, this embodiment also includes a first crush energy absorbing member 81 connected to the third locking tooth plate 80, so that the third locking tooth plate 80 also serves as a crush block. When the car collides, the third locking tooth plate 80 cooperates with the first crush energy absorbing member 81 to achieve crushing, thereby ensuring the driving safety of the driver.

[0041] like Figure 3 Combination Fig. 9 As shown, the third locking tooth piece 80 is a rectangular tooth piece, and the engaging teeth are arranged on the side wall of the rectangular tooth piece. The first crushing energy absorbing member 81 is a "J"-shaped steel wire, and the "J"-shaped steel wire is arranged around the outer periphery of the third locking tooth piece 80. The first crushing energy absorbing member 81 includes a friction matching section 811, a penetration section 812 and an arc section 813; the friction matching section 811 is arranged between the third locking tooth piece 80 and the outer shell of the steering column 600, the penetration section 812 is penetrated on the outer shell, and the friction matching section 811 and the penetration section 812 are connected through the arc section 813. In addition, the arc section 813 is located in the crushing direction of the steering column 600.

[0042] When the present embodiment is in use, the housing and the third locking tooth piece 80 are connected to the steering column bracket, and the steering column bracket is fixed to the instrument panel cross beam, thereby indirectly fixing the housing and the third locking tooth piece 80 . After a collision, the vehicle decelerates greatly. Under the action of inertia, the driver will continue to rush forward quickly and collide with the steering wheel. After the steering wheel is impacted by the human body, it will push the shell connected to the steering column 600 to move downward along the axis, that is, the collapse direction is downward along the axis, while the steering column bracket is fixed on the dashboard cross beam and does not move. At this time, the third locking tooth piece 80 and the steering column bracket remain relatively still, that is, the third locking tooth piece 80 and the first collapse energy absorbing member 81 move relative to each other along the shell; and because the friction fitting segment 811 is arranged between the third locking tooth piece 80 and the shell, the friction force generated by the relative movement between the three realizes a part of the collapse energy absorption; and because the penetration segment 812 is connected to the friction fitting segment 811 through the arc segment 813, when the shell moves in the collapse direction, the shell pushes the arc segment 813 in the collapse direction to produce tensile deformation, thereby further realizing the collapse energy absorption. In the whole collapse process, this embodiment utilizes relative friction and tensile deformation to realize collapse energy absorption. No unnecessary movement is generated during collapse. Besides, except for the first collapse energy absorbing component 81, no failure deformation or fracture occurs in other parts. The fluctuation range of collapse force is small, the product consistency is high, and the integration is good.

[0043] like Figure 10-11 As shown, this embodiment also includes a first transition bracket 200 connected to the main locking assembly 100, a secondary locking assembly 300 spaced apart from the main locking assembly 100, and a second transition bracket 400 connected to the secondary locking assembly 300; the first transition bracket 200 and the second transition bracket 400 are connected by a transition portion 500. The first transition bracket 200 and the second transition bracket 400 are part or the whole of the steering column bracket, and are used to be fixedly connected to the instrument panel cross beam. The steering column 600 is located between the main locking assembly 100 and the secondary locking assembly 300. The secondary locking assembly 300 cooperates with the main locking assembly 100 to limit and fix the steering column 600 and assist in adjusting the steering column 600. This embodiment can meet the requirements of being installed on the instrument panel cross beam through the setting mode of the split bracket of the first transition bracket 200 and the second transition bracket 400, and has a simple structure and can achieve a lightweight design.

[0044] In this embodiment, the second locking tooth plate 40 is fixedly connected to the first transition bracket 200, and the second locking tooth plate 40 and the third locking tooth plate 80 are respectively located on both sides of the first transition bracket 200. When the position of the steering column 600 needs to be adjusted, the first locking tooth plate 30, the third locking tooth plate 80 and the fourth locking tooth plate 90 can move relative to the first transition bracket 200 and drive the steering column 600 to move or rotate to complete four-way adjustment.

[0045] This embodiment further includes a first gasket 82 disposed between the third locking tooth plate 80 and the first transition bracket 200. The first gasket 82 buffers the friction between the third locking tooth plate 80 and the first transition bracket 200 and makes the connection between the two more reliable.

[0046] The transition part 500 of this embodiment is located between the main locking assembly 100 and the secondary locking assembly 300, and matches the position of the steering column 600, and the transition part 500 is provided with a column elastic sheet 510 that provides certain support to the steering column 600. One end of the column elastic sheet 510 is connected to the transition part 500, and the other end slides against the outer shell of the steering column 600, and the tension direction of the column elastic sheet 510 is perpendicular to the axial direction of the steering column 600. When the locking mechanism of this embodiment is in the unlocked state, the column elastic sheet 510 can make the steering wheel connected to the steering column 600 have a certain holding force to prevent the steering wheel from falling in the unlocked state.

[0047] The secondary locking assembly 300 of this embodiment includes a second handle 310, an auxiliary crush block 320, and a second crush energy absorbing member 330 connected to the auxiliary crush block 320. The second handle 310 and the auxiliary crush block 320 are connected through a second pin 340. The second handle 310 is connected to the first handle 50, so when the first handle 50 is rotated, the second handle 310 can be driven to rotate.

[0048] The auxiliary crush block 320 cooperates with the second crush energy absorbing member 330 to assist in crush energy absorption. The second crush energy absorbing member 330 at least includes an auxiliary matching section 331 disposed between the auxiliary crush block 320 and the outer shell of the steering column 600, that is, the auxiliary matching section 331 has the same function and structure as the friction matching section 811, and plays the role of limiting guidance and energy absorption.

[0049] Similar to the structure and principle of the first gasket 82 , this embodiment further includes a second gasket 370 disposed between the auxiliary collapse block 320 and the second transition bracket 400 .

[0050] The second crush energy absorber 330 in this embodiment is a "C"-shaped steel wire. Thus, the second crush energy absorber 330 includes two auxiliary cooperation segments 331 arranged in parallel with each other. The two auxiliary cooperation segments 331 are respectively located on two opposite sides of the auxiliary crush block 320, and the ends of the two auxiliary cooperation segments 331 are connected by a connection segment 332. The second crush energy absorber 330 is arranged around the outer periphery of the auxiliary crush block 320, and the connection segment 332 is arranged closely against a short side of one side of the auxiliary crush block 320. The side where the connection segment 332 is located is the direction opposite to the crush direction. Thus, during the crush sliding process, the auxiliary crush block 320 also plays a limiting role on the second crush energy absorber 330.

[0051] The auxiliary locking assembly 300 in this embodiment further includes a third rotating block 350 and a fourth rotating block 360. The structures and cooperation relationships of the third rotating block 350 and the fourth rotating block 360 are similar to those of the first rotating block 10 and the second rotating block 20, and the fourth rotating block 360 is connected to the second handle 310. Thus, when the second handle 310 rotates forward or backward, a pressing force or a yielding position can be provided to the steering column 600.

[0052] This embodiment further provides an automobile. The automobile includes a steering column 600 and the locking mechanism as described in any one of the above. The locking mechanism cooperates with the steering column 600. The automobile of this embodiment adopts the above locking mechanism, which not only has a simple process, does not require additional customization, has a low cost, but also has higher reliability, higher utilization rate, is structurally compact, and has a higher integration level.

[0053] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.

[0054] The above-described embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it cannot be understood as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the invention patent should be subject to the appended claims.

Claims

1. A locking mechanism, characterized in that: include: The main locking assembly comprises a first rotating block and a second rotating block that are rotatably matched, a first locking tooth piece and a first handle connected to the second rotating block, a second locking tooth piece matched with the first locking tooth piece, a first return spring arranged on the first locking tooth piece and the second locking tooth piece, and a first pin shaft passed through and connected to the first rotating block, the second rotating block, the first locking tooth piece, the second locking tooth piece and the first return spring; the first rotating block comprises a first turning platform and a first convex portion arranged on the first turning platform, the second rotating block comprises a second turning platform, a hollow portion arranged on the second turning platform and matched with the first convex portion, and a second convex portion arranged on the second turning platform and matched with the first locking tooth piece, the second convex portion is arranged on the second turning platform away from the first turning platform, and the second convex portion is engaged with the first handle; the first locking tooth piece is provided with a third convex portion matched with the second convex portion; It also includes a third locking tooth piece and a fourth locking tooth piece which are sleeved on the first pin shaft and cooperate with each other, and a second return spring which is arranged between the third locking tooth piece and the fourth locking tooth piece; The steering column further comprises a first crush energy absorbing member connected to the third locking tooth plate, wherein the third locking tooth plate cooperates with the first crush energy absorbing member to achieve crushing; the first crush energy absorbing member comprises a friction fitting section, a penetration section and an arc section; the friction fitting section is arranged between the third locking tooth plate and the outer shell of the steering column, the penetration section penetrates the outer shell, the friction fitting section and the penetration section are connected through the arc section, and the arc section is located in the crushing direction of the steering column; It also includes a first transition bracket connected to the main locking assembly, a secondary locking assembly spaced apart from the main locking assembly, and a second transition bracket connected to the secondary locking assembly; the first transition bracket and the second transition bracket are connected via a transition portion.

2. The locking mechanism according to claim 1, characterized in that: The first protrusion includes a first boss and a first slide connected to the first boss and having a slope, and the highest point of the first slide is docked with the first boss; and / or the third protrusion includes a third boss and a third slide connected to the third boss and having a slope, and the highest point of the third slide is docked with the third boss.

3. The locking mechanism according to claim 1, characterized in that: The first turning platform and the second turning platform are both circular blocks, there are at least two first convex parts and at least two hollow parts, and the first convex parts and the hollow parts correspond to each other one by one, the first convex parts are evenly spaced along the circumferential direction of the first turning platform, and the hollow parts are evenly spaced along the circumferential direction of the second turning platform.

4. The locking mechanism according to claim 1, characterized in that: The arrangement direction of the engaging teeth on the third locking tooth plate and the fourth locking tooth plate is arranged at an angle to the arrangement direction of the engaging teeth on the first locking tooth plate and the second locking tooth plate.

5. The locking mechanism according to claim 1, characterized in that: The third locking tooth piece is a rectangular tooth piece, and the first crush energy absorbing member is a "J" shaped steel wire.

6. The locking mechanism according to claim 1, characterized in that: The transition portion is provided with a column elastic sheet.

7. The locking mechanism according to claim 1, characterized in that: The secondary locking assembly includes a second handle, an auxiliary collapse block, and a second collapse energy absorbing member connected to the auxiliary collapse block. The second handle and the auxiliary collapse block are both connected through a second pin shaft.

8. A car, characterized in that: It comprises a steering column and a locking mechanism as claimed in any one of claims 1 to 7, wherein the locking mechanism cooperates with the steering column.

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