CN212637639U - Steering wheel position adjusting mechanism for kart and novel kart - Google Patents

Abstract

A steering wheel position adjustment mechanism for a kart and a novel kart relate to the technical field of vehicles. The steering column of the steering wheel position adjustment mechanism includes an upper steering column and a lower steering column. The upper steering column is cylindrical and is sleeved on the lower steering column in a sliding way along the axial direction of the upper steering column. And the upper steering column is fixedly matched with the lower steering column along the circumferential direction of the upper steering column. The outer wall of the lower steering column is provided with a rack arranged along the axial direction of the lower steering column, the upper steering column is provided with a driving assembly, and a driving gear of the driving assembly is meshed with the rack and used for driving the upper steering column and the lower steering column to move relatively along the axial direction, so that the extension or the shortening of the steering column is controlled. The improved safety device is simple in structure and convenient to use, is beneficial to improving and promoting the operation comfort of a user, and simultaneously greatly improves the overall safety and reliability. The novel kart has higher operation comfort level, and overall security and reliability are higher.

Description

Steering wheel position adjusting mechanism for kart and novel kart

Technical Field

The utility model relates to the technical field of vehicles, particularly, relate to a steering wheel position control mechanism and novel kart for kart.

Background

With the development of society and the improvement of living standard, the kart sports become popular entertainment sports for the public, and the kart is more and more diversified at present. However, the comfort and experience of drivers with different heights can be seriously influenced by the existing kart in the using process. On the other hand, the driving safety of the conventional kart is affected when the kart is ergonomically adjusted.

In view of this, the present application is specifically made.

SUMMERY OF THE UTILITY MODEL

A first object of the present invention is to provide a steering wheel position adjusting mechanism for a kart, which has a simple structure and is convenient to use, and is helpful for improving and enhancing the operation comfort of users, and enhancing the adaptability to users with different body types; meanwhile, the overall safety and reliability are greatly improved.

A second object of the utility model is to provide a novel kart, it has higher operating comfort, all has better adaptation degree to the user of different sizes, and whole security and reliability are higher.

The embodiment of the utility model is realized like this:

a steering wheel position adjustment mechanism for a kart, the steering column of which comprises: an upper steering column and a lower steering column. The upper steering column is cylindrical and is sleeved on the lower steering column in a sliding way along the axial direction of the upper steering column. And the upper steering column is fixedly matched with the lower steering column along the circumferential direction of the upper steering column. The outer wall of the lower steering column is provided with a rack arranged along the axial direction of the lower steering column, the upper steering column is provided with a driving assembly, and a driving gear of the driving assembly is meshed with the rack and used for driving the upper steering column and the lower steering column to move relatively along the axial direction, so that the extension or the shortening of the steering column is controlled.

Furthermore, the rack is formed by convex teeth which are uniformly arranged along the axial direction of the lower steering column at intervals, the convex teeth comprise an extension section which extends along the radial direction of the lower steering column and a tail section which is connected to the end wall of the extension section, and the tail section is hemispherical and is subjected to smoothing treatment. Along the circumference of lower steering column, many racks even interval sets up.

The inner wall of the upper steering column is concavely provided with a sliding groove for the sliding of the rack, and the length of the convex teeth is greater than the depth of the sliding groove. The convex teeth are propped against the bottom wall of the groove of the sliding groove through the tail section, and a gap is reserved between the outer wall of the lower steering column and the inner wall of the upper steering column.

Further, the lower end wall of the upper steering column is provided with extension arms extending along the axial direction of the upper steering column, and the extension arms are evenly arranged along the circumferential direction of the extension arms at intervals.

And a locking block is arranged between every two adjacent extension arms. The lateral wall of extension arm is offered and is used for cooperating breach with the locking piece, and along the radial of last steering column, the both sides of locking piece are equallyd divide and are do not cooperate in the breach slidable. Along the axial of last steering column, locking piece and extension arm fixed coordination. The lateral wall of one side of the locking block, which is close to the central axis of the upper steering column, is provided with a tooth hole matched with the convex teeth. The locking block is configured with a control assembly for driving it away from and toward the lower steering column to accomplish the release and locking of the lower steering column.

Furthermore, the inner wall of the notch is provided with a guide groove arranged along the sliding direction of the locking block, and the locking block is provided with a guide edge in sliding fit with the guide groove.

Furthermore, the locking block is provided with a matching through hole which is formed along the axial direction of the upper steering column, the matching through hole extends along the radial direction of the upper steering column.

The control assembly includes: an expansion assembly and a reduction assembly. The expansion assembly comprises a push rod and a cylinder. The push rod is arranged along the axial direction of the upper steering column, one end of the push rod, which is close to the locking block, is provided with a guide wall, and the guide wall is positioned on one side of the push rod, which is far away from the upper steering column. The distance between the guide wall and the upper steering column increases gradually from one end of the push rod close to the locking block to the other end of the push rod.

The push rod is in transmission fit with the air cylinder and used for driving the push rod to move towards the locking block, so that the push rod is inserted into the matching through hole to push the locking block to one side far away from the lower steering column, or the push rod is driven to withdraw from the matching through hole of the locking block, and the locking block is reset under the action of the resetting component.

Furthermore, the inner wall of the matching through hole is also rotatably matched with a rolling column, the rolling column is positioned on one side of the hole cavity of the matching through hole, which is far away from the upper steering column, and the rotating axis line of the rolling column is perpendicular to the sliding direction of the corresponding locking block, so that the rolling column can be in rolling fit with the guide wall of the push rod.

Further, the reset assembly includes: a reset ring and an elastic element. The reset ring is coaxially arranged with the upper steering column and fixedly connected with the upper steering column. One end of the elastic piece is fixedly connected to the inner wall of the reset ring, and the other end of the elastic piece abuts against the side wall, far away from the central axis of the upper steering column, of the locking block.

Further, the outer wall of the upper steering column has an annular flange through which the push rod extends in sliding engagement. The end parts of the push rods, which are far away from the locking blocks, are connected to the synchronizing ring, the outer wall of the upper steering column is slidably sleeved with the synchronizing ring, and the push rods are in transmission fit with the air cylinder through the synchronizing ring.

Further, the annular flange has an inner cavity, and inner cavity fixed mounting has first electrically conductive post and second to lead electrical pillar, and first electrically conductive post and second lead electrical pillar both coaxial setting and interval setting. One side of the annular flange, which is close to the synchronizing ring, is provided with a yielding through hole for communicating the inner cavity with the outside, and the yielding through hole points to a gap area between the first conductive column and the second conductive column.

The power supply line of the driving assembly is in conductive connection with the first conductive column, and the power supply assembly for supplying power to the driving assembly is in conductive connection with the second conductive column. One side of synchronizer ring that is close to the annular flange is provided with electrically conductive shell fragment to when making when the cylinder promotes the push rod and push away the locking block, electrically conductive shell fragment can insert in the middle of the clearance between first leading electrical pillar and the second conducting pillar through the through-hole of stepping down, thereby lead electrical conduction with first leading electrical pillar and second.

A novel carting car, comprising: the steering wheel position adjusting mechanism is described above.

The embodiment of the utility model provides a beneficial effect is:

the embodiment of the utility model provides a steering wheel position control mechanism for kart realizes the control to the whole length of steering column through the drive volume and the direction of drive of control drive assembly in the use to the realization is to the regulation of the height of whole steering wheel mechanism. Specifically, when the lower steering column is driven by the drive gear of the drive unit via the rack to extend from the upper steering column, the steering column as a whole is extended, and the steering wheel mechanism as a whole is raised in height. When the lower steering column is driven by the driving gear of the driving assembly through the rack to move towards the upper steering column, the whole steering column is shortened, and the whole height of the steering wheel mechanism is lowered.

The whole adjusting process is very convenient, simple and fast, and good in stability, and the stability and the safety of the whole vehicle can not be influenced by the height adjustment of the steering wheel mechanism.

Generally, the steering wheel position adjusting mechanism for the kart provided by the embodiment of the utility model has simple structure and convenient use, is beneficial to improving and promoting the operation comfort of users and improves the adaptation degree of users with different body types; meanwhile, the overall safety and reliability are greatly improved. The embodiment of the utility model provides a novel kart has higher operating comfort, all has better adaptation degree to the user of different sizes, and whole security is higher with the reliability.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a first view angle of a steering wheel position adjusting mechanism according to an embodiment of the present invention;

FIG. 2 is a schematic view of the steering wheel position adjustment mechanism of FIG. 1 from a second perspective;

FIG. 3 is a schematic view showing an internal structure of the steering wheel position adjusting mechanism of FIG. 1;

FIG. 4 is a schematic view of the structure of the teeth of the steering wheel position adjustment mechanism of FIG. 3;

FIG. 5 is a schematic view of the steering wheel position adjustment mechanism of FIG. 3 with the locking block push rod not inserted into the locking block;

FIG. 6 is an enlarged view of area A of FIG. 5;

FIG. 7 is a schematic view of the steering wheel position adjustment mechanism of FIG. 3 with the locking block push rod inserted into the locking block;

FIG. 8 is an enlarged view of area B of FIG. 5;

FIG. 9 is a schematic view of the mating of the upper and lower steering columns;

FIG. 10 is a schematic end view of the upper steering column;

FIG. 11 is a schematic cross-sectional view of an extension arm of the upper steering column;

FIG. 12 is a schematic view of the locking block in the locked (collapsed) condition;

FIG. 13 is a schematic view of the locking block in an unlocked state (blown apart);

FIG. 14 is a schematic view of the locking block;

FIG. 15 is a schematic view of the reset assembly with the lock block in the locked (closed) condition;

FIG. 16 is a mating view of the reset assembly with the locking block in the unlocked (spread) position;

FIG. 17 is a schematic diagram of the power supply of the drive assembly of the steering wheel position adjustment mechanism of FIG. 1;

fig. 18 is a schematic structural diagram of a first operating state of the novel kart according to an embodiment of the present invention;

fig. 19 is a schematic structural diagram of a second operating state of the novel carting car provided by the embodiment of the present invention.

Icon: a steering wheel position adjustment mechanism 1000; an upper steering column 100; a chute 110; an extension arm 120; a notch 121; a guide groove 122; an annular flange 130; the first conductive pillar 131; a second conductive pillar 132; a synchronizing ring 140; a conductive dome 141; a lower steering column 200; a rack 210; the convex teeth 211; the extension section 211 a; a tail section 211 b; a drive assembly 300; a drive gear 310; a locking block 400; a perforation 410; a guide rib 420; a mating through-hole 430; a rolling post 440; a push rod 510; the guide wall 511; a cylinder 520; a reset ring 610; an elastic member 620; a new carting car 2000.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

The terms "first," "second," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Examples

Referring to fig. 1 to 3, in the present embodiment, a steering wheel position adjusting mechanism 1000 for a kart is provided, and a steering column of the steering wheel position adjusting mechanism 1000 includes: an upper steering column 100 and a lower steering column 200.

The upper column 100 is cylindrical, and the upper column 100 is slidably fitted around the lower column 200 in the axial direction thereof. The upper steering column 100 is fixedly engaged with the lower steering column 200 in the circumferential direction of the upper steering column 100.

The outer wall of the lower steering column 200 has a rack 210 disposed along the axial direction thereof, the upper steering column 100 is provided with a driving assembly 300, and a driving gear 310 of the driving assembly 300 is engaged with the rack 210 to drive the upper steering column 100 and the lower steering column 200 to relatively move in the axial direction, thereby controlling the elongation or contraction of the entire steering column.

In use, control of the overall length of the steering column, and thus adjustment of the height of the overall steering wheel mechanism, may be achieved by controlling the amount and direction of drive of the drive assembly 300. Specifically, when the lower steering column 200 is driven to extend from the upper steering column 100 through the rack 210 by the drive gear 310 of the drive unit 300, the steering column as a whole extends, and the steering wheel mechanism as a whole rises in height. When the lower steering column 200 is driven by the driving gear 310 of the driving assembly 300 through the rack gear 210 to move into the upper steering column 100, the steering column as a whole is shortened, and the steering wheel mechanism as a whole is lowered in height.

The whole adjusting process is very convenient, simple and fast, and good in stability, and the stability and the safety of the whole vehicle can not be influenced by the height adjustment of the steering wheel mechanism.

Generally, the embodiment of the utility model provides a steering wheel position adjustment mechanism 1000 for kart simple structure, convenient to use help improving and promote user's operating comfort, improve the adaptation degree to the user of different sizes, still ensured whole security and reliability simultaneously.

In the present embodiment, the upper steering column 100 has a cylindrical shape, and the lower steering column 200 has a cylindrical shape.

Referring to fig. 4, further, the rack 210 is formed of convex teeth 211 uniformly spaced in the axial direction of the lower steering column 200, and the convex teeth 211 include an extension 211a extending in the radial direction of the lower steering column and a tail section 211b connected to an end wall of the extension 211a, and the tail section 211b is formed in a hemispherical shape and is smoothed. A plurality of racks 210 are uniformly spaced along the circumferential direction of the lower steering column 200.

The inner wall of the upper steering column 100 is concavely provided with a sliding groove 110 for the rack 210 to slide, and the length of the convex tooth 211 (the sum of the lengths of the extension 211a and the tail end) is greater than the depth of the sliding groove 110. The teeth 211 abut the bottom wall of the sliding groove 110 through the tail section 211b, and there is a gap between the outer wall of the lower steering column 200 and the inner wall of the upper steering column 100.

Through the above design, on the one hand, stable relative movement between the lower steering column 200 and the upper steering column 100 is ensured, and on the other hand, resistance between the two during relative movement (adjustment) is greatly reduced, and mechanical wear is reduced. In addition, such a design also helps to improve the fitting effect between the driving gear 310 and the rack 210.

Referring to fig. 5 to 14, the lower end wall of the upper steering column 100 has extending arms 120 extending along the axial direction thereof, and the extending arms 120 are uniformly spaced along the circumferential direction thereof.

A locking block 400 is arranged between two adjacent extension arms 120. The sidewall of the extension arm 120 is opened with a notch 121 for matching with the locking block 400, and along the radial direction of the upper steering column 100, both sides of the locking block 400 are respectively matched with the notch 121 in a sliding manner. The locking block 400 is fixedly engaged with the extension arm 120 in the axial direction of the upper steering column 100.

A tooth hole 410 for engaging with the tooth 211 is formed in a side wall of the lock block 400 near a central axis of the upper steering column 100. The lock block 400 is configured with a control assembly for driving it away from and toward the lower steering column 200 to accomplish the release and locking of the lower steering column 200.

When the overall length of the steering column is adjusted, the upper steering column 100 and the lower steering column 200 are maintained relatively stationary. At this time, the control assembly drives the locking block 400 to move along the notch 121 of the extension arm 120 toward the lower steering column 200, so that the toothed hole 410 of the locking block 400 is engaged with the convex teeth 211, thereby locking the lower steering column 200.

Through the design, the steering column can be guaranteed to have enough relative stability between the lower steering column 200 and the upper steering column 100 after being adjusted in place, the stress load at the driving gear 310 is reduced, and the overall stability of the steering column is improved.

In this embodiment, the inner wall of the notch 121 is opened with a guide groove 122 disposed along the sliding direction of the locking block, and the locking block is provided with a guide rib 420 for sliding fit with the guide groove 122. Wherein the sliding direction of the locking block is the radial direction of the upper steering column 100 corresponding to the middle position thereof.

Further, the locking block has a fitting through-hole 430 opened in the axial direction of the upper steering column 100, the fitting through-hole 430, and the fitting through-hole 430 extends in the radial direction of the upper steering column 100.

The control assembly includes: an expansion assembly and a reduction assembly.

The expansion assembly comprises: a push rod 510 and a cylinder 520. The push rod 510 is disposed along the axial direction of the upper steering column 100, and one end of the push rod 510 near the locking block 400 has a guide wall 511, and the guide wall 511 is located on the side of the push rod 510 away from the upper steering column 100. The guide wall 511 is gradually spaced from the upper steering column 100 in a direction in which one end of the push rod 510 adjacent to the locking block 400 is directed to the other end thereof.

The push rod 510 is in driving engagement with the cylinder 520 to drive the push rod 510 to move toward the locking block 400, so that the push rod 510 is inserted into the engagement through hole 430 to push the locking block 400 to a side away from the lower steering column 200, or to drive the push rod 510 to withdraw from the engagement through hole 430 of the locking block 400, so that the locking block 400 is reset under the action of the reset assembly.

Referring to fig. 15 to 16, the reset assembly includes: a reset ring 610 and a resilient member 620. The reset ring 610 is coaxially disposed with the upper steering column 100, and the reset ring 610 is fixedly coupled with the upper steering column 100. The elastic member 620 has one end fixedly connected to the inner wall of the reset ring 610 and the other end abutting against a sidewall of the locking block 400 on a side away from the central axis of the upper steering column 100.

The locking of the lower steering column 200 by the locking block 400 needs to be released before the overall length of the steering column is adjusted. The push rod 510 is pushed by the cylinder 520 to be inserted into the fitting through hole 430 of the locking block 400, so that the push rod 510 pushes the locking block 400 away from the lower steering column 200 by the guide wall 511 thereof, and the teeth 211 are disengaged from the tooth holes 410 to achieve unlocking. At this time, the driving assembly 300 can be used to drive the lower steering column 200 and the upper steering column 100 to move relatively, so as to adjust the length.

After the adjustment is completed, the control push rod 510 retracts and resets, the locking block also resets under the action of the elastic member 620, and the convex teeth 211 are matched with the toothed hole 410 again to lock the lower steering column 200 again.

In this embodiment, the inner wall of the fitting through hole 430 is further rotatably fitted with a rolling column 440, the rolling column is located on one side of the bore of the fitting through hole 430, which is far away from the upper steering column 100, and the rotation axis of the rolling column 440 is perpendicular to the sliding direction of the corresponding locking block 400, so that the rolling column 440 can be in rolling contact with the guide wall 511 of the push rod 510, so that the push rod 510 can push the locking block 400 more smoothly, and mechanical wear is reduced.

Further, referring to fig. 17, the outer wall of the upper steering column 100 has an annular flange 130, and the push rod 510 penetrates the annular flange 130 and is slidably engaged therewith. The end parts of the push rods 510 far away from the locking block 400 are all connected to the synchronizing ring 140, the synchronizing ring 140 is slidably sleeved on the outer wall of the upper steering column 100, and the push rods 510 are in transmission fit with the air cylinder 520 through the synchronizing ring 140. Thereby improving the motor synchronization coordination of the putter 510.

The annular flange 130 has an inner cavity, the inner cavity is fixedly mounted with a first conductive column 131 and a second conductive column 132, and the first conductive column 131 and the second conductive column 132 are coaxially arranged and spaced apart. An abdicating through hole for communicating the inner cavity with the outside is formed at one side of the annular flange 130 close to the synchronizing ring 140, and the abdicating through hole points to a gap area between the first conductive pillar 131 and the second conductive pillar 132.

The power supply line of the driving assembly 300 is electrically connected to the first conductive pillar 131, and the power supply assembly for supplying power to the driving assembly 300 is electrically connected to the second conductive pillar 132. One side of the synchronizing ring 140 close to the annular flange 130 is provided with a conductive elastic sheet 141, so that when the cylinder 520 pushes the push rod 510 to push the locking block 400 away, the conductive elastic sheet can be inserted into the gap between the first conductive pillar 131 and the second conductive pillar 132 through the abdicating through hole, thereby electrically connecting the first conductive pillar 131 and the second conductive pillar 132.

Through the design, the power supply of the driving assembly 300 can be communicated only after the push rod 510 pushes the locking block 400 away to unlock the lower steering column 200, so that misoperation is avoided, and misoperation is reduced.

In this embodiment, the driving assembly 300 may be configured by using a servo motor equipped with a reducer and a driving gear 310.

Referring to fig. 18 to 19, the present embodiment further provides a novel carting car 2000, where the novel carting car 2000 includes: a steering wheel position adjustment mechanism 1000.

For users with larger physique, the height of the steering wheel mechanism can be increased, and the seat body can be moved backwards along the sliding column. For users with small physique, the height of the steering wheel mechanism can be adjusted to be low, and the seat body can move forwards along the sliding column.

The novel kart 2000 can not lead to the change of the gravity center in the adjusting process, and is favorable for further improving the driving safety. Through adjusting seat body and steering wheel mechanism to can satisfy the user of different physiques, and this kind of mode is stepless adjustable, lets the user can find the most comfortable man-machine position. The seat body sinks to the chassis, and the installation height of the seat body cannot be increased in the adjusting process, so that the center of gravity of the whole vehicle is lower, the side turning is prevented when the vehicle is bent at a high speed, and the safety of the whole vehicle is improved.

In summary, the steering wheel position adjusting mechanism 1000 for the kart is simple in structure and convenient to use, and is helpful for improving and promoting the operation comfort of users and improving the adaptation degree of users with different body types; meanwhile, the overall safety and reliability are greatly improved. Novel kart 2000 has higher operating comfort, all has better adaptation degree to the user of different sizes, and whole security and reliability are higher.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A steering wheel position adjustment mechanism for a kart, characterized in that its steering column comprises: an upper steering column and a lower steering column; the upper steering column is cylindrical and can be sleeved on the lower steering column in a sliding manner along the axial direction of the upper steering column; the upper steering column is fixedly matched with the lower steering column along the circumferential direction of the upper steering column; the outer wall of the lower steering column is provided with a rack arranged along the axial direction of the lower steering column, the upper steering column is provided with a driving assembly, and a driving gear of the driving assembly is meshed with the rack and used for driving the upper steering column and the lower steering column to move relatively along the axial direction, so that the extension or the shortening of the steering column is controlled.

2. The steering wheel position adjusting mechanism according to claim 1, wherein the rack is formed of teeth arranged at regular intervals in an axial direction of the lower steering column, the teeth including an extension section extending in a radial direction of the lower steering column and a tail section connected to an end wall of the extension section, the tail section being hemispherical and smoothed; a plurality of racks are uniformly arranged at intervals along the circumferential direction of the lower steering column;

the inner wall of the upper steering column is concavely provided with a sliding groove for the rack to slide, and the length of the convex tooth is greater than the depth of the sliding groove; the convex teeth are abutted against the bottom wall of the sliding groove through the tail section, and a gap is formed between the outer wall of the lower steering column and the inner wall of the upper steering column.

3. The steering wheel position adjusting mechanism according to claim 2, wherein the lower end wall of the upper steering column has extension arms extending in an axial direction thereof, and a plurality of the extension arms are arranged at regular intervals in a circumferential direction thereof;

a locking block is arranged between every two adjacent extension arms; a notch used for being matched with the locking block is formed in the side wall of the extension arm, and two sides of the locking block are respectively matched with the notch in a sliding mode along the radial direction of the upper steering column; the locking block is fixedly matched with the extension arm along the axial direction of the upper steering column; a tooth hole matched with the convex tooth is formed in the side wall, close to the central axis of the upper steering column, of the locking block; the locking block is configured with a control assembly for driving it away from and toward the lower steering column to accomplish the release and locking of the lower steering column.

4. The steering wheel position adjusting mechanism according to claim 3, wherein the inner wall of the notch is provided with a guide groove arranged along the sliding direction of the locking block, and the locking block is provided with a guide rib for sliding fit with the guide groove.

5. The steering wheel position adjustment mechanism according to claim 4, wherein the lock block has a fitting through-hole that is opened in an axial direction of the upper steering column, the fitting through-hole extending in a radial direction of the upper steering column;

the control assembly includes: an expansion assembly and a reduction assembly; the expansion assembly comprises a push rod and a cylinder; the push rod is arranged along the axial direction of the upper steering column, one end of the push rod, which is close to the locking block, is provided with a guide wall, and the guide wall is positioned on one side of the push rod, which is far away from the upper steering column; the distance between the guide wall and the upper steering column increases progressively from one end of the push rod close to the locking block to the other end of the push rod;

the push rod is in transmission fit with the air cylinder and used for driving the push rod to move towards the locking block, so that the push rod is inserted into the matching through hole to push the locking block to one side far away from the lower steering column, or the push rod is driven to withdraw from the matching through hole of the locking block, and the locking block is reset under the action of the resetting component.

6. The steering wheel position adjusting mechanism according to claim 5, wherein a rolling column is rotatably engaged with an inner wall of the engaging through hole, the rolling column is located on a side of the bore of the engaging through hole away from the upper steering column, and a rotation axis of the rolling column is perpendicular to a sliding direction of the corresponding locking block, so that the rolling column can be in rolling contact with the guide wall of the push rod.

7. The steering wheel position adjustment mechanism of claim 5, wherein the reset assembly comprises: a reset ring and an elastic member; the reset ring is coaxially arranged with the upper steering column and fixedly connected with the upper steering column; one end of the elastic piece is fixedly connected to the inner wall of the reset ring, and the other end of the elastic piece abuts against the side wall, far away from the central axis of the upper steering column, of the locking block.

8. The steering wheel position adjustment mechanism of claim 5, wherein the outer wall of the upper steering column has an annular flange through which the push rod extends and is in sliding engagement therewith; the end parts, far away from the locking blocks, of the push rods are connected to the synchronizing ring, the synchronizing ring is slidably sleeved on the outer wall of the upper steering column, and the push rods are in transmission fit with the air cylinder through the synchronizing ring.

9. The steering wheel position adjustment mechanism of claim 8, wherein the annular flange has an inner cavity to which are fixedly mounted a first conductive post and a second conductive post, the first conductive post and the second conductive post being coaxially disposed and spaced apart; an abdicating through hole used for communicating the inner cavity with the outside is formed in one side, close to the synchronizing ring, of the annular flange, and the abdicating through hole points to a gap area between the first conductive column and the second conductive column;

the power supply wire of the driving assembly is in conductive connection with the first conductive column, and the power supply assembly for supplying power to the driving assembly is in conductive connection with the second conductive column; one side of synchronizer ring, which is close to the annular flange, is provided with a conductive elastic sheet, so that when the cylinder pushes the push rod to push the locking block away, the conductive elastic sheet can pass through the abdicating through hole and be inserted into a gap between the first conductive column and the second conductive column, thereby electrically connecting the first conductive column and the second conductive column.

10. A novel carting car, which is characterized by comprising: a steering wheel position adjustment mechanism as claimed in any one of claims 1 to 9.

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