A collapse device for an electrically adjustable column

Abstract

The application discloses a collapsing device of an electrically-adjusted column, and relates to the field of electrically-adjusted columns. The collapsing device of the electrically-adjusted column comprises a lower column and an upper column, the upper column is slidably connected in the lower column, and further comprises a rectangular shell which is fixedly connected on both sides of the lower column symmetrically and is integrally formed with the lower column, a toothed plate which is fixedly connected on one side of the upper column and located in the rectangular shell, and a support which is fixedly connected on one side of the lower column near the toothed plate on the upper end. The application can absorb energy by generating different collapsing forces of the electrically-adjusted column according to the strength of the impact force of the automobile, so that the electrically-adjusted column can generate a collapsing force to absorb the impact force and disperse the impact force transmitted to the human body from the steering column due to the impact, so as to better protect the life safety of the driver.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of electric adjusting column, in particular, relates to a collapsing device of electric adjusting column. BACKGROUND

[0002] In recent years, traffic accidents occur frequently, and car safety has become one of the hotspots of people's concern. When the car crashes violently, the driver often leans forward due to the strong stopping effect, and the chest of the human body will collide with the steering wheel. In order to reduce the impact force on the driver's chest impacted by the steering column, a collapsing energy-absorbing device is usually provided on the electric steering column of the car when designing the internal structure of the car. When the vehicle collides, the column can collapse and deform according to the pre-design, thereby dispersing some impact force transmitted to the human body by the steering column due to the impact.

[0003] In the prior art, the application number is CN202022059124.0, and the name is an electric steering column device. The electric steering column device comprises a transmission shaft, a guide sleeve, a sliding sleeve, a collapsing section, a damping adjusting device, a transmission disc fastening bolt, a main body disc fastening bolt, a mounting seat, a transmission sleeve, a rotating shaft, a locking device, a U-shaped connecting part of the universal shaft, a front end transmission shaft, a positioning ring, a main body disc, and a transmission disc. Wherein: the transmission shaft is connected with the guide sleeve and is tightly connected, the sliding sleeve is fixedly connected to the front end of the guide sleeve, the collapsing section is slidingly connected with the sliding sleeve, and the axial distance between the collapsing section and the transmission shaft can be adjusted, and the damping adjusting device is arranged between the sliding sleeve and the collapsing section. The collapsing section passes through the transmission disc and the main body disc, and the collapsing section is connected with the front end transmission shaft. The front end transmission shaft is connected with the transmission sleeve. The utility model has the advantages of flexible transmission, stable column structure, convenient adjustment of collapsing distance and damping size, wide application range, good use effect, reduced loss and saved cost during use.

[0004] Although the above-mentioned patent has the advantages of flexible transmission, stable column structure, convenient adjustment of collapsing distance and damping size, and wide application range, once the collapsing structure is formed, the collapsing force that can be generated during the operation of the entire vehicle is certain. Therefore, once the collapsing structure of the steering column of the existing product is made, the collapsing force generated during the collision and the energy absorbed are constant. However, in real life, the type of accident and the speed of the vehicle are random, and the steering column often cannot provide different collapsing forces or different energy-absorbing capacities according to the actual collision. Therefore, the driver cannot be well protected. In view of this, the present application is proposed. SUMMARY

[0005] The technical problem solved by the present application is to overcome the deficiencies of the prior art, and to provide a collapsing device of an electrically adjusted column which can overcome the above problems or at least partially solve the above problems.

[0006] To solve the above technical problems, the basic idea of the technical solution of the present application is: a collapsing device of an electrically adjusted column, comprising a lower column and an upper column, the upper column being slidingly connected in the lower column, further comprising: a rectangular shell being fixedly connected symmetrically on both sides of the lower column and being integrally formed with the lower column; a tooth plate being fixedly connected on one side of the upper column and located in the rectangular shell; a support being fixedly connected on one side of the upper end of the lower column close to the tooth plate; a rotating rod being rotatably connected on the support; a rotating wheel being fixedly connected on the rotating rod, wherein a through hole is formed on the position of the lower column close to the rotating wheel, and the lower side of the rotating wheel is located in the through hole of the lower column; a plurality of friction blocks with different friction forces being sequentially distributed on the rotating wheel from small to large friction force and being slidingly connected with the surface of the upper column; a transmission assembly for driving the rotating rod to rotate being installed on the position of the rectangular shell close to the tooth plate.

[0007] Further, the transmission assembly comprises a transmission gear, a transmission rod, a first bevel gear and a second bevel gear, the transmission rod being rotatably connected on the rectangular shell close to the tooth plate, the transmission gear being fixedly connected on the transmission rod and being engaged with the tooth plate, the first bevel gear being fixedly connected on the upper end of the transmission rod, and the second bevel gear being fixedly connected on one end of the rotating rod close to the transmission rod and being engaged with the first bevel gear.

[0008] In order to facilitate the stability of the transmission of the rotating rod, further, the outer side of the transmission rod, the first bevel gear and the second bevel gear is sleeved with a protective cover, and the protective cover is fixedly connected on the rectangular shell and the support.

[0009] In order to facilitate the air cooling of the friction block, so as to ensure the friction force of the friction block on the upper column, further, a gas cylinder is fixedly connected on the upper end of one side of the support away from the second bevel gear, a piston rod with a piston is slidingly connected in the gas cylinder, a connecting plate is fixedly connected on one end of the piston rod close to the rotating wheel, a reciprocating thread is arranged on the surface of one side of the rotating rod away from the second bevel gear, the connecting plate and the rotating rod are rotatably connected through the reciprocating thread, a gas tank is fixedly connected on the position of the upper end of the support close to the rotating wheel, the gas inlet of the gas tank and the gas outlet of the gas cylinder are communicated through a gas pipe, a one-way valve is arranged in the gas inlet and the gas outlet of the gas cylinder, a jet pipe is fixedly connected on the gas outlet of the gas tank, and the jet heads of the jet pipes are inclined downward and face the friction blocks.

[0010] In order to further improve the cooling effect of the friction block, further, two groups of jet pipes are symmetrically arranged.

[0011] In order to facilitate the friction block to the upper column friction effect, further, the outer surface of the plurality of friction block is concave arc design.

[0012] In order to facilitate the effect of energy absorption, further, the upper column is fixedly connected with the collapse plate near the tail end of the lower column, the rectangular shell is provided with an opening at the position of the collapse plate, the collapse plate is provided with a U-shaped slot hole, the end of the collapse plate away from the tooth plate is provided with a mounting plate, the side of the mounting plate away from the collapse plate is provided with a support plate, the mounting plate is rotatably connected with a pin bolt through a thread, the end of the pin bolt is slidably connected in the U-shaped slot hole, the support plate is provided with a rivet, the expansion end of the rivet is inserted into the upper column, the tail end of the lower column is provided with a driving motor, the output end of the driving motor is fixedly connected with a driving shaft, the driving block is installed on the support plate through the clamping plate, and the driving block is threadedly connected with the driving shaft.

[0013] In order to facilitate the movement of the upper column more stably, further, the collapse plate is symmetrically fixedly connected on both sides of the upper column, and the support plate is a concave plate.

[0014] In order to facilitate the driving motor to drive the upper column to move more stably, further, the mounting plate is provided with a limiting protrusion at one end close to the tooth plate, the mounting plate is fixedly connected with a limiting protrusion at one end away from the limiting protrusion, and the support plate is provided with a limiting groove at the position of the limiting protrusion.

[0015] After the above technical scheme is adopted, the present application has the following beneficial effects compared with the prior art: through the cooperation of the tooth plate, the transmission assembly, the rotating rod, the rotating wheel and the plurality of friction blocks with different friction, different collapse forces can be generated to absorb energy according to the strength of the impact force of the automobile, so that no matter how large the impact force of the automobile is, the collapse force can be generated to absorb the impact force, and some impact force transmitted to the human body from the steering column due to the impact can be dispersed, so as to better protect the life safety of the driver.

[0016] The specific embodiments of the present application will be described in further detail below in combination with the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0017] The drawings are part of the present application, which is used to provide a further understanding of the present application, the illustrative embodiments of the present application and the description thereof are used to explain the present application, but do not constitute an improper limitation on the present application. Obviously, the drawings in the following description are only some embodiments, and other drawings can be obtained by those skilled in the art without creating laborious work.

[0018] In the drawings:

[0019] Figure 1 Structure diagram of a collapsing device of an electrically adjusted column according to the present application;

[0020] Figure 2 Structure diagram of a lower column, an upper column and a rectangular shell in a collapsing device of an electrically adjusted column according to the present application;

[0021] Figure 3 Structure diagram of an upper column, a lower column, a collapsing plate, a mounting plate, a support plate, a pin bolt, a clamping plate and a driving block in a collapsing device of an electrically adjusted column according to the present application;

[0022] Figure 4 A collapsing device of an electrically adjusted column according to the present application Figure 1 Structure diagram of part A in the collapsing device of the electrically adjusted column according to the present application;

[0023] Figure 5 Structure diagram of an upper column, a lower column, a transmission assembly, a rotating wheel, a friction block, a rotating rod and an air cylinder in a collapsing device of an electrically adjusted column according to the present application;

[0024] Figure 6 Structure diagram of a rotating rod, a rotating wheel and a friction block in a collapsing device of an electrically adjusted column according to the present application;

[0025] Figure 7 Stereoscopic structure diagram of an upper column, a toothed plate, a collapsing plate, a mounting plate, a support plate, a clamping plate and a driving block in a collapsing device of an electrically adjusted column according to the present application;

[0026] Figure 8 Exploded structure diagram of an upper column, a toothed plate, a collapsing plate, a mounting plate, a support plate, a clamping plate and a driving block, a pin bolt and a rivet in a collapsing device of an electrically adjusted column according to the present application.

[0027] In the figure: 1, lower column; 101, rectangular shell; 102, opening; 2, upper column; 3, driving motor; 4, driving block; 5, collapsing plate; 501, U-shaped slot hole; 6, mounting plate; 7, support plate; 8, clamping plate; 10, limiting protrusion; 11, toothed plate; 12, transmission gear; 13, transmission rod; 14, first bevel gear; 15, support; 16, rotating rod; 17, rotating wheel; 18, friction block; 19, second bevel gear; 20, reciprocating thread; 21, air cylinder; 22, piston rod; 23, connecting plate; 24, air tank; 25, air jet pipe; 26, driving block; 27, pin bolt; 28, rivet.

[0028] It should be noted that the drawings and the written description are not intended to limit the scope of the present application in any way, but are merely to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments will be described clearly and completely below with reference to the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application, but are not used to limit the scope of the present application.

[0030] Embodiment 1

[0031] Referring to Figures 1-8 A collapsing device of an electrically adjusted column includes a lower column 1 and an upper column 2, the upper column 2 is slidingly connected in the lower column 1, and further includes: a rectangular shell 101, symmetrically fixedly connected on two sides of the lower column 1 and integrally formed with the lower column 1; a toothed plate 11, fixedly connected on one side of the upper column 2 and located in the rectangular shell 101; a bracket 15, fixedly connected on one side of the upper end of the lower column 1 close to the toothed plate 11; a rotating rod 16, rotatably connected on the bracket 15; a rotating wheel 17, fixedly connected on the rotating rod 16, wherein a through hole is formed on the position of the lower column 1 close to the rotating wheel 17, and the lower side of the rotating wheel 17 is located in the through hole of the lower column 1; a plurality of friction blocks 18 with different friction forces, sequentially distributed on the rotating wheel 17 from small to large in terms of friction force and slidingly connected with the surface of the upper column 2; a transmission assembly for driving the rotating rod 16 to rotate, installed on the position of the rectangular shell 101 close to the toothed plate 11.

[0032] The transmission assembly includes a transmission gear 12, a transmission rod 13, a first bevel gear 14 and a second bevel gear 19, the transmission rod 13 is rotatably connected on the rectangular shell 101 close to the toothed plate 11, the transmission gear 12 is fixedly connected on the transmission rod 13 and engaged with the toothed plate 11, the first bevel gear 14 is fixedly connected on the upper end of the transmission rod 13, and the second bevel gear 19 is fixedly connected on one end of the rotating rod 16 close to the transmission rod 13 and engaged with the first bevel gear 14.

[0033] When the car has a severe impact, the driver will be forward due to the strong stop effect, and the chest of the human body will collide with the steering wheel. When the steering wheel is impacted, the upper column 2 will collapse into the inside of the lower column 1, and then the upper column 2 will drive the tooth plate 11 to move, and the tooth plate 11 will drive the transmission gear 12 to rotate, and the transmission gear 12 will drive the transmission rod 13 to rotate, and the transmission rod 13 will drive the second bevel gear 19 to rotate through the first bevel gear 14, and the second bevel gear 19 will drive the rotating rod 16 to rotate at the same time, and then the rotating rod 16 will drive the rotating wheel 17 to rotate clockwise, so that the relative friction between the rotating wheel 17 and the upper column 2 is generated, thereby increasing the collapse force of the upper column 2. The friction between the friction block 18 provided on the rotating wheel 17 and the upper column 2 increases in turn, so that when the impact force of the car is small, the sliding distance of the upper column 2 into the lower column 1 is short, and then the rotating wheel 17 will rotate a small angle, and then the friction block 18 with small friction will be attached to the upper column 2, thereby generating a small collapse force. When the impact force of the car is more severe, the sliding distance of the upper column 2 into the lower column 1 will increase, and then the rotating wheel 17 will be driven to rotate a large angle, so that the friction block 18 with large friction will be attached to the upper column 2, thereby generating a large collapse force. Through the cooperation of the tooth plate 11, the transmission assembly, the rotating rod 16, the rotating wheel 17 and the multiple friction blocks 18 with different friction, different collapse forces can be generated on the electric adjusting column according to the strength of the impact force of the car, thereby better protecting the driver.

[0034] Embodiment 2:

[0035] Referring to Figures 1-8 A collapse device of an electric adjusting column, which is basically the same as embodiment 1, and further has a protective cover sleeved on the outside of the transmission rod 13, the first bevel gear 14 and the second bevel gear 19, and the protective cover is fixedly connected to the rectangular shell 101 and the bracket 15. Through the arrangement of the protective cover, the transmission rod 13, the first bevel gear 14 and the second bevel gear 19 can be protected, so that the first bevel gear 14 and the second bevel gear 19 cannot be driven due to the stone being clamped therebetween;

[0036] An air cylinder 21 is fixedly connected to the upper end of the support 15 on the side away from the second bevel gear 19. A piston rod 22 with a piston is slidably connected inside the air cylinder 21. A connecting plate 23 is fixedly connected to the end of the piston rod 22 near the rotating wheel 17. A reciprocating thread 20 is provided on the surface of the rotating rod 16 on the side away from the second bevel gear 19. The connecting plate 23 and the rotating rod 16 are rotatably connected through the reciprocating thread 20. An air box 24 is fixedly connected to the upper end of the support 15 near the rotating wheel 17. The air inlet of the air box 24 is connected to the air outlet of the air cylinder 21 through an air pipe. One-way valves are provided in both the air inlet and outlet of the air cylinder 21. A jet pipe 25 is fixedly connected to the air outlet of the air box 24. All the jet nozzles of the 5 are tilted downwards towards the friction block 18. When the rotating rod 16 drives the rotating wheel 17 to rotate, it can also drive the connecting plate 23 to move back and forth through the reciprocating thread 20. Then the connecting plate 23 will drive the piston rod 22 to move back and forth in the air cylinder 21. Then gas can be delivered into the air box 24 through the air pipe, so that the jet pipe 25 sprays gas onto the contact surface between the upper tube column 2 and the friction block 18, thereby cooling the contact surface between the upper tube column 2 and the friction block 18 by jetting gas. This prevents the contact surface from reducing the friction force due to the temperature rise during friction, which would affect the collapse and energy absorption effect of the tube column. This effectively ensures the stability of the device for tube column collapse and energy absorption.

[0037] Two sets of jet pipes 25 are symmetrically arranged. By symmetrically arranging two sets of jet pipes 25, jet cooling can be applied to both the front and rear sides of the friction block 18 at the same time, further improving the cooling effect on the friction block 18.

[0038] The outer surfaces of the multiple friction blocks 18 are all designed with an inwardly concave arc shape. By making the outer surfaces of the friction blocks 18 have an inwardly concave arc shape, the multiple friction blocks 18 can be in close contact with the upper pipe column 2 when they are in contact, thereby ensuring that the friction blocks 18 stably provide friction force to the upper pipe column 2.

[0039] Example 3:

[0040] Reference Figures 1-8The collapsing device of the electrically adjusted column is basically same as that of the embodiment 2, and further has that the tail end of the upper column 2 is fixedly connected with a collapsing plate 5 on the side close to the lower column 1, the rectangular shell 101 is provided with an opening 102 at the position of the collapsing plate 5, the collapsing plate 5 is provided with a U-shaped slot hole 501, the end of the collapsing plate 5 away from the tooth plate 11 is provided with a mounting plate 6, the side of the mounting plate 6 away from the collapsing plate 5 is provided with a support plate 7, the mounting plate 6 is threadedly connected with a pin bolt 27, the end of the pin bolt 27 is slidably connected in the U-shaped slot hole 501, the support plate 7 is installed with a rivet 28, the expansion end of the rivet 28 is inserted into the upper column 2, the tail end of the lower column 1 is installed with a driving motor 3 on the upper side, the output end of the driving motor 3 is fixedly connected with a driving shaft 4, the support plate 7 is installed with a driving block 26 through a clamping plate 8, the driving block 26 is threadedly connected with the driving shaft 4, when the steering wheel is adjusted forward and backward in normal direction, the driving shaft 4 is driven to rotate by the driving motor 3, the driving block 26 is driven to move forward and backward by the thread, the mounting plate 6 is driven to move by the clamping plate 8 and the support plate 7, the upper column 2 is driven to move forward and backward by the mounting plate 6 through the rivet 28 and the collapsing plate 5, when a car crash occurs, in order to ensure the safety of the driver, the upper column 2 and the lower column 1 have collapsing requirements, the peak value of the collapsing safety force is generally about 2000-4000N, the smooth force is about 1500-2500N, but the sliding friction force between the upper column 2 and the lower column 1 is only about 500-1000N, so the energy absorption device is needed to compensate the collapsing force, when the front impact occurs and the impact force exceeds the design value, the rivet 28 is pulled off at the time of the impact, the maximum shear force is about 2000N, at the same time, the pin bolt 27 is slidably frictioned in the U-shaped slot hole 501 of the collapsing plate 5 to provide a sliding friction force of 1000-2000N, so that the peak value and the smooth value of the collapsing force of the upper column 2 and the lower column 1 can meet the safety force requirements, thereby increasing the collapsing energy absorption effect and improving the safety of the driver;

[0041] The collapsing plate 5 is symmetrically fixedly connected on both sides of the upper column 2, the support plate 7 is a concave plate, the collapsing plate 5 is symmetrically arranged on both sides of the upper column 2, when the upper column 2 is adjusted forward and backward or the upper column 2 is collapsed, the upper column 2 can be smoothly moved in the lower column 1, avoiding that the upper column 2 only rubs with the inner wall of one side of the lower column 1, thereby reducing the collapsing energy absorption effect, effectively ensuring the collapsing energy absorption effect of the column;

[0042] The mounting plate 6 is provided with a limiting protrusion close to one end of the toothed plate 11, and the mounting plate 6 is fixedly connected with a limiting block 10 away from the limiting protrusion, and the supporting plate 7 is provided with a limiting groove at the position of the limiting block 10, through the limiting protrusion, the limiting block 10 and the limiting groove, when the supporting plate 7 is installed, the supporting plate 7 can be clamped on the limiting block 10 of the mounting plate 6 through the limiting groove, and under the cooperation of the pin column bolt 27, the supporting plate 7 can be stably fixed on the mounting plate 6, so that under the resistance of the limiting protrusion and the limiting block 10, when the upper pipe column 2 needs to be adjusted forward and backward, the driving motor 3 can be stably moved through the supporting plate 7, and the stability of the forward and backward movement of the upper pipe column 2 is effectively improved.

[0043] The present application can generate different collapsing forces on the electrically adjusted pipe column according to the strength of the impact force of the automobile through the cooperation of the toothed plate 11, the transmission assembly, the rotating rod 16, the rotating wheel 17 and the plurality of friction blocks 18 with different friction, so that the driver can be better protected.

[0044] In the specification provided herein, a large number of specific details are described. However, it can be understood that the embodiments of the present application can be practiced without these specific details. In some examples, well-known methods, structures and techniques are not shown in detail in order not to obscure the understanding of the present specification.

[0045] The above only describes the preferred embodiments of the present application, and does not limit the present application in any form. Although the present application has been disclosed as the above preferred embodiments, it is not intended to limit the present application, and any person skilled in the art can make some changes or modifications to the above-mentioned technical content as equivalent embodiments without departing from the technical solution of the present application. Any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present application are still within the scope of the present application.

Claims

1. An electrically operated collapsing device for adjusting a column, comprising a lower column (1) and an upper column (2), the upper column (2) being slidingly connected in the lower column (1), characterized in that, Also include: rectangular shell (101), symmetrically fixedly connected to the two sides of the lower pipe column (1), and integrated with the lower pipe column (1); The tooth plate (11) is fixedly connected to one side of the upper pipe column (2) and located in the rectangular shell (101); The support (15) is fixedly connected to one side of the upper end of the lower pipe column (1) close to the tooth plate (11); The rotating rod (16) is rotatably connected to the support (15); The rotating wheel (17) is fixedly connected to the rotating rod (16), Wherein, the lower pipe column (1) is provided with a through hole close to the rotating wheel (17), and the lower side of the rotating wheel (17) is located in the through hole of the lower pipe column (1); A plurality of friction blocks (18) with different friction forces are sequentially distributed on the rotating wheel (17) from small to large in terms of friction force and are in sliding connection with the surface of the upper pipe column (2); The transmission assembly for driving the rotating rod (16) to rotate is installed at the position of the rectangular shell (101) close to the tooth plate (11); The transmission assembly includes a transmission gear (12), a transmission rod (13), a first bevel gear (14) and a second bevel gear (19), the transmission rod (13) is rotatably connected to the rectangular shell (101) on one side close to the tooth plate (11), the transmission gear (12) is fixedly connected to the transmission rod (13) and is in meshing connection with the tooth plate (11), the first bevel gear (14) is fixedly connected to the upper end of the transmission rod (13), and the second bevel gear (19) is fixedly connected to one end of the rotating rod (16) close to the transmission rod (13) and is in meshing connection with the first bevel gear (14).

2. A collapse device for an electrically adjustable column according to claim 1, characterized in that: The outer side of the transmission rod (13), the first bevel gear (14) and the second bevel gear (19) is sleeved with a protective cover, and the protective cover is fixedly connected to the rectangular shell (101) and the support (15).

3. A collapse device for an electrically adjustable column according to claim 1, characterized in that: The air cylinder (21) is fixedly connected to the upper end of the side away from the second bevel gear (19) of the support (15), the piston rod (22) with a piston is slidably connected in the air cylinder (21), the connecting plate (23) is fixedly connected to one end of the piston rod (22) close to the rotating wheel (17), the reciprocating thread (20) is arranged on the surface of the side away from the second bevel gear (19) of the rotating rod (16), the connecting plate (23) and the rotating rod (16) are rotatably connected through the reciprocating thread (20), the air tank (24) is fixedly connected to the position of the upper end of the support (15) close to the rotating wheel (17), the air inlet of the air tank (24) and the air outlet of the air cylinder (21) are communicated through the air pipe, the one-way valves are arranged in the air inlets and outlets of the air cylinder (21), the air outlet of the air tank (24) is fixedly connected with the air jet pipe (25), and the air jet heads of the air jet pipe (25) are inclined downward and face the friction blocks (18).

4. A collapse device for an electrically adjustable column according to claim 3, characterized in that: The air jet pipe (25) is symmetrically provided with two groups.

5. A collapse device for power-adjustable columns according to claim 1, characterized in that: The outer surfaces of the plurality of friction blocks (18) are designed in concave arc shape.

6. A collapse device for power-adjustable columns according to claim 1, characterized in that: The tail end side of the upper pipe column (2) is fixedly connected with a collapse plate (5) close to the lower pipe column (1), the rectangular shell (101) is provided with an opening (102) at the position of the collapse plate (5), a U-shaped slot hole (501) is formed in the collapse plate (5), an installation plate (6) is arranged at the end of the collapse plate (5) away from the tooth plate (11), a support plate (7) is arranged on the side of the installation plate (6) away from the collapse plate (5), a pin column bolt (27) is threadedly connected to the installation plate (6), the end of the pin column bolt (27) is slidably connected in the U-shaped slot hole (501), a rivet (28) is installed on the support plate (7), the expansion end of the rivet (28) is inserted into the upper pipe column (2), a drive motor (3) is installed on the tail end upper side of the lower pipe column (1), a drive shaft (4) is fixedly connected to the output end of the drive motor (3), a drive block (26) is installed on the support plate (7) through a clamping plate (8), and the drive block (26) is threadedly connected with the drive shaft (4).

7. A collapse device for an electrically adjustable column according to claim 6, characterized in that: The collapse plate (5) is symmetrically fixedly connected on both sides of the upper pipe column (2), and the support plate (7) is a concave plate.

8. A collapse device for an electrically adjustable column according to claim 6, characterized in that: The end of the installation plate (6) close to the tooth plate (11) is provided with a limiting protrusion, the end of the installation plate (6) away from the limiting protrusion is fixedly connected with a limiting protruding block (10), and a limiting recess is formed in the support plate (7) at the position of the limiting protruding block (10).

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