CN111634167A - A wheelbase adjusting device of a suspension system and a suspension system - Google Patents

Abstract

The invention relates to a wheelbase adjusting device of a suspension system and a suspension system, comprising: a square support structure, the upper part of which is provided with a chute and the lower part is provided with an opening; a cam mechanism is installed on the square support structure, and The cam mechanism includes a cam body, the upper part of the cam body is provided with a through hole that is hinged with the chute through a first bolt, the first bolt is used to connect the suspension link mechanism, and the first bolt is It can slide in the chute, and the lower part of the cam body is provided with a rotation center hole that is coaxially hinged with the opening; the worm mechanism is passed through the square support structure and is located at the bottom of the cam mechanism. Below, the worm mechanism is drivingly connected with the cam mechanism, and when the worm mechanism is rotated, the cam mechanism can rotate around the rotation center hole. The suspension system and the wheel base adjusting device thereof of the present invention can realize infinitely variable pitch and can be used for the development of vehicle models of different levels.

Description

A wheelbase adjusting device of a suspension system and a suspension system

technical field

The invention relates to the field of auto parts, in particular to a wheelbase adjusting device of a suspension system and a suspension system.

Background technique

With the development of the economy and the improvement of people's living standards, automobiles have become one of the important tools for people to travel. At present, the number and speed of development of automobile models are constantly increasing, and at the same time, platformization and modularization require a higher and higher proportion of parts sharing. A shared suspension system can adjust its wheelbase.

In the related art, a wheel base adjusting device for a wheeled chassis vehicle currently includes: a suspension mounting seat connected with a suspension wishbone, and the suspension mounting seat is mounted on a slider, the suspension mounting seat is The cross arm is connected with the wheel; the sliding block is slidably matched with the sliding rail fixed on the frame, the sliding rail is arranged along the direction parallel to the frame beam, and the suspension mounting seat is provided with a double head Acting hydraulic cylinder, the double-acting hydraulic cylinder can push the suspension mounting seat, the suspension arm and the wheel to move along the sliding rail; when the vehicle needs to change the wheelbase according to road conditions, it drives the The double-acting hydraulic cylinder can realize the wheel movement, so as to realize the change of the wheel base, and has a locking mechanism assembly fixed on the frame. When the suspension wishbone is in a non-moving state, the suspension The cross arm is locked with the frame of the vehicle.

However, this kind of wheel track adjustment device is adjusted according to the driving conditions of the vehicle to realize the adjustment of the smaller wheel track, its structure is complex, and it is only suitable for the wheel track adjustment of the wheeled chassis of special vehicles, and cannot be used for different classes of vehicles. The general requirements of development cannot meet the stepless adjustment of larger wheel bases above 20mm, resulting in the inability to share suspension systems for cross-class models, increasing development costs and development time.

SUMMARY OF THE INVENTION

The embodiments of the present invention provide a wheelbase adjustment device and a suspension system for a suspension system, so as to solve the problem that the wheelbase adjustment amount in the related art is small, cannot meet the stepless adjustment of a larger wheelbase of more than 20 mm, and cross-class models cannot share the suspension system, increasing development costs and development time.

In a first aspect, a wheelbase adjusting device for a suspension system is provided, which includes: a square support structure, the upper part of which is provided with a chute, and the lower part is provided with an opening; a cam mechanism is installed on the square support structure, and all the The cam mechanism includes a cam body, the upper part of the cam body is provided with a through hole hinged with the chute through a first bolt, the first bolt is used to connect the suspension link mechanism, and the first bolt can Sliding in the chute, the lower part of the cam body is provided with a rotation center hole that is coaxially hinged with the opening; the worm mechanism passes through the square support structure and is located below the cam mechanism , the worm mechanism is connected with the cam mechanism in a driving manner, and when the worm mechanism is rotated, the cam mechanism can rotate around the rotation center hole.

In some embodiments, the worm mechanism includes a screw, two ends of which are threadedly connected to a third nut fixed on the square support structure, and a worm body integrally provided on the screw, the worm body and the The cam mechanism drive connection.

In some embodiments, the upper half of the cam body is a cam, and the through hole is arranged on the top of the cam, the lower half of the cam body is a turbine, and the rotation center hole is arranged on the cam junction with the turbine.

In some embodiments, the first bolt and the chute are in a sliding clearance fit, and one end of the first bolt is provided with a first nut matched therewith.

In some embodiments, the chute is arc-shaped, and the arc between two ends of the chute is at least 60°.

In some embodiments, the rotation center hole is connected with the opening hole by a second bolt, the second bolt and the opening hole are in a sliding clearance fit, and one end of the second bolt is fixed by a second nut.

In a second aspect, a suspension system is provided, which includes: a square support structure, the upper part of which is provided with a chute, and the lower part is provided with an opening; a cam mechanism, mounted on the square support structure, and the cam mechanism includes a cam The upper part of the cam body is provided with a through hole that is hinged with the chute through a first bolt, and the first bolt can slide in the chute, and the lower part of the cam body is provided with the A rotating center hole with a coaxial hinged opening; a worm mechanism, which is penetrated on the square support structure and is located below the cam mechanism, and the worm mechanism is connected with the cam mechanism in a transmission. When the worm mechanism is rotated The cam mechanism can rotate around the rotation center hole; one end of the suspension link mechanism is assembled and connected with the wheel, and the other end is connected with the first bolt.

In some embodiments, the suspension linkage mechanism includes a suspension hinge shaft passing through the first bolt, the suspension hinge shaft can move together with the first bolt, and one end is welded to the suspension hinge. A suspension link for a hinged shaft is provided, and the other end of the suspension link is connected to the wheel.

In some embodiments, the worm mechanism includes a screw, two ends of which are threadedly connected to a third nut fixed on the square support structure, and a worm body integrally provided on the screw, the worm body and the The cam mechanism drive connection.

In some embodiments, the chute is arc-shaped, and the arc between two ends of the chute is at least 60°.

The beneficial effects brought by the technical solution provided by the present invention include:

Embodiments of the present invention provide a wheelbase adjusting device for a suspension system and a suspension system. Since the suspension link mechanism is connected with the cam mechanism, the cam mechanism is in driving cooperation with the worm mechanism. , when the worm mechanism is rotated, the cam body can be rotated around the rotation center hole in the lower part, so that the first bolt on the upper part of the cam body drives the suspension link mechanism to swing together, Therefore, it is possible to realize the adjustment of the larger wheel base of the suspension system, to meet the stepless adjustment of the large wheel base of more than 20mm, and to be used for the universal requirements of the development of models of different levels, thereby reducing the development cost and development time.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

1 is a schematic front view of a cam mechanism and a worm mechanism of a wheelbase adjusting device of a suspension system according to an embodiment of the present invention;

Fig. 2 is the transmission detail schematic diagram of the cam mechanism and the worm mechanism in Fig. 1;

3 is a schematic front view of a square support structure of a wheelbase adjusting device of a suspension system according to an embodiment of the present invention;

Fig. 4 is the motion envelope schematic diagram of the cam mechanism in Fig. 1;

5 is a schematic front view of a suspension system according to an embodiment of the present invention;

6 is a schematic left view of a suspension system according to an embodiment of the present invention;

7 is a schematic top view of a suspension system according to an embodiment of the present invention;

8 is a schematic diagram of the assembly of a suspension system and a wheel provided by an embodiment of the present invention;

FIG. 9 is a schematic diagram of a _long wheel track maximum limit position L and _{a short} wheel track minimum limit position L of a suspension system according to an embodiment of the present invention.

In the figure: 100, wheel base adjustment device; 1, square support structure; 11, chute; 12, opening; 13, slotting; 2, cam mechanism; 21, cam body; 211, through hole; 22, first Bolt; 23, first nut; 24, second bolt; 25, second nut; 212, rotation center hole; 213, turbine tooth surface; 214, through slot; 3, worm mechanism; 31, lead screw; 32, first Three nuts; 33, worm body; 331, worm helix; 4, suspension linkage; 41, suspension hinge shaft; 42, suspension link; 5, wheel; 6, chassis bracket longitudinal beam; A, Left limit position; B, middle position; C, right limit position.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in 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. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

The embodiments of the present invention provide a wheel track adjustment device for a suspension system and a suspension system, which can solve the problem that the wheel track adjustment amount in the related art is small and cannot meet the stepless adjustment of a larger wheel track of more than 20 mm, and the cross-class model The suspension system cannot be shared, which increases the development cost and development time.

Referring to FIGS. 1 and 3 , a wheelbase adjusting device 100 for a suspension system provided in an embodiment of the present invention includes: a square support structure 1 ; and a cam mechanism 2 installed on the upper part of the square support structure 1 ; The worm mechanism 3 is arranged in the lower part of the square support structure 1 and is connected with the lower surface of the cam mechanism 2 in a driving manner.

Referring to FIG. 3 , in some embodiments, the square support structure 1 may be a square box body and an integrated welded structure, and in other embodiments, the square support structure 1 may also be a plate , the upper part can be provided with a chute 11, the chute 11 is preferably arc-shaped, and the arc between the two ends of the chute 11 is at least 60°, and the upper part of the square support structure 1 can be provided with an opening Slot 13, the slot 13 penetrates upward through the top surface of the square support structure 1, and the slot 13 penetrates the opposite sides of the square support structure 1 from left to right in the horizontal direction, and the bottom of the slot 13 The end can extend downward to the bottom of the chute 11; the middle and lower part of the square support structure 1 can be provided with an opening 12, the opening 12 is concentric with the chute 11, and the square support structure 1 The opposite sides of the bottom end can be respectively provided with welding surfaces, and the two third nuts 32 are respectively welded to the two welding surfaces, so as to be fixedly connected with the square support structure 1 as a whole, wherein the third nuts 32 are respectively welded to the two welding surfaces. The size of 32 can choose different standard parts according to the actual situation.

Referring to FIG. 1 and FIG. 6 , in some optional embodiments, the cam mechanism 2 can be installed inside the square support structure 1 . When the square support structure 1 is a plate, the cam The mechanism 2 can be installed on one side thereof, the cam mechanism 2 can include a cam body 21, the upper half of the cam body 21 can be designed as a cam, and the lower half of the cam body 21 can be designed as a semicircular turbine, the cam A rotation center hole 212 is provided at the connection with the turbine. The rotation center hole 212 is located at the lower part of the cam body 21 and is concentric with the turbine. The rotation center hole 212 is the same as the opening 12 The rotation center hole 212 and the opening 12 can be hinged through a second bolt 24, the second bolt 24 includes a second head and a second shaft part connected with the second head, A section of the second shaft portion close to the second head may be an optical axis, and a section away from the second head may be a threaded shaft, and a second pin is provided on the threaded shaft of the second head The second shaft portion can be penetrated from one plate surface of the square support structure 1 to the opposite plate surface, so that the threaded shafts of the second head portion and the second shaft portion are located at the The opposite sides of the square support structure 1 and the optical axis of the second shaft portion pass through the rotation center hole 212 and the opening 12 , and the optical axis of the second shaft portion and the The rotation center hole 212 is a sliding clearance fit, so that the cam body 21 can rotate relative to the second bolt 24, and the threaded shaft of the second bolt 24 can be provided with a second nut 25 that matches with it. Two nuts 25 can fix the second bolt 24 on the square support structure 1, and the second nut 25 can be tightened so that the second nut 25 and the second head are connected to the The two opposite plate surfaces of the square support structure 1 are in close contact, and then a split pin can be installed into the second pin hole for secondary protection to prevent the second nut 25 from being in contact with the threaded shaft of the second shaft portion The positioning failure is caused by the loosening of the thread, the second bolt 24 and the second nut 25 are both standard parts, and the parameter size is adapted to the diameter of the rotation center hole 212 and the opening hole 12 .

1 and 6, in some embodiments, the surface of the turbine may be provided with a turbine tooth surface 213, the turbine tooth surface 213 is preferably a helical tooth, and the shape and size of the turbine can be installed according to the actual At the same time, the helical teeth of the turbine tooth surface 213 meet the self-locking structure, and the parameters of the helical teeth can be adjusted; the top of the cam can be provided with a through hole 211 corresponding to the chute 11, and the The through hole 211 and the rotation center hole 212 may both be located on the symmetrical center line of the cam body 21 , the center of the through hole 211 is located on the longitudinal axis of the chute 11 , and the through hole 211 The diameter is the same as the width of the chute 11, the through hole 211 and the chute 11 are hinged by a first bolt 22, and the first bolt 22 includes a first head and a The connected first shaft portion, a section of the first shaft portion close to the first head can be an optical axis, a section away from the first head can be a threaded shaft, and the thread of the first head The shaft is provided with a first pin hole, and the first shaft portion can be penetrated from one plate surface of the square support structure 1 to the opposite plate surface, so that the first head and the first shaft The threaded shafts of the first shaft portion are respectively located on opposite sides of the square support structure 1, and the optical shaft of the first shaft portion passes through the chute 11 and the through hole 211, and the first shaft portion The optical axis of the slide slot 11 and the through hole 211 are in sliding clearance fit.

Referring to FIG. 1 , FIG. 4 and FIG. 6 , in some optional embodiments, the threaded shaft of the first bolt 22 may be provided with a first nut 23 matched with it, and the first nut After 23 is installed on the threaded shaft of the first bolt 22, install the cotter pin into the first pin hole for secondary protection to prevent the first nut 23 from threading the first shaft portion The positioning of the shaft is caused by the loose thread, and the distance between the first nut 23 and the first head is greater than the distance between the two opposite plate surfaces of the square support structure 1, so that the first bolt 22 The connection with the square support structure 1 is not fixed, and the first bolt 22 can slide in the chute 11. The diameter of the hole 211 may be slightly larger than the diameter of the optical axis of the first shaft portion, and the first bolt 22 can drive the through hole 211 to swing together while sliding in the chute 11 . The swing trajectory is the same as the arc shape of the chute 11 , the first bolt 22 and the first nut 23 are standard parts, and the parameters are suitable for the diameter of the through hole 211 and the width of the chute 11 . match.

Referring to FIGS. 1 , 4 and 6 , in some embodiments, the upper part of the cam is provided with a through slot 214 penetrating through its top and opposite sides, and the bottom end of the through slot 214 extends downward beyond all the the bottom end of the slot 13, the optical axis of the first shaft portion can be located in the through groove 214, the optical axis of the first shaft portion can be connected to the suspension link mechanism 4, and the through groove 214 is used to install the suspension link mechanism 4 in place. When the first bolt 22 slides in the chute 11, the suspension link mechanism 4 can follow the first shaft portion to left and right moving, the slot 13 on the square support structure 1 is used to make room for the movement of the suspension link mechanism 4, since the free end of the suspension link mechanism 4 is connected to the wheel 5, through By moving the suspension link mechanism 4 corresponding to each of the wheels 5 , the wheel distance between the two wheels 5 can be adjusted.

Referring to FIG. 1 , FIG. 2 and FIG. 5 , in some optional embodiments, the worm mechanism 3 may be located below the cam mechanism 2 , and the worm mechanism 3 may include a lead screw 31 . Both ends of the rod 31 may be provided with rotating steps, and the middle position of the screw rod 31 may be integrally provided with a worm body 33 . The worm body 33 is preferably provided in the square support structure 1 and located in the cam body 21 Right below, the surface of the worm body 33 is provided with a worm helical surface 331 that is drivingly connected to the turbine tooth surface 213, and the contact surface between the turbine tooth surface 213 and the worm helical surface 331 reaches a self-locking angle. The screw rod 31 and the worm screw body 33 are integrally arranged, and the structure is simple and reliable. The worm body 33 is provided with a threaded surface that cooperates with the third nut 32, and the lead screw 31 can pass through the third nut 32. 31 rotates on the third nut 32 while moving left and right, driving the worm body 33 to rotate; The optical axis is set between the rotation step at the other end and the worm body 33; the optical axis can also be set between the rotation steps at both ends and the worm body 33 according to the situation; The third nut 32 on the square support structure 1 is used to position the screw rod 31, which can support the screw rod 31 and reduce the force on the turbine tooth surface 213. There is a backlash at the contact between the worm helical surface 331 and the turbine tooth surface 213. By arranging the third nut 32 to cooperate with the threaded surface on the screw rod 31, the vehicle can be prevented from driving under extreme load due to severe driving. The side clearance produces abnormal noise.

Referring to FIG. 4 , in some embodiments, a wrench can be used to rotate the rotating step clockwise, the screw 31 drives the worm body 33 to rotate, and the worm helical surface 331 and the turbine tooth surface 213 pass through. drive, so that the cam body 21 starts to rotate clockwise around the rotation center hole 212 from the middle position B, and the first bolt 22 together with the through hole 211 starts from the symmetrical centerline position of the chute 11 to the right move, and drive the suspension link mechanism 4 to move to the right together until it reaches the right limit position C at the rightmost end of the chute 11. Since the through hole 211 is located at the top position of the cam body 21, all the The through hole 211 is far away from the rotation center hole 212. When the cam body 21 rotates around the rotation center hole 212 at a certain angle, the through hole 211 together with the first bolt 22 can move a larger distance. distance, so that the suspension link mechanism 4 can adjust the wheelbase to a greater extent; in the same way, the rotation step can be rotated counterclockwise with a wrench, so that the first bolt 22 can drive the suspension link The mechanism 4 moves from the middle position B to the left together until it reaches the left extreme position A of the leftmost end of the chute 11, so that the first bolt 22 and the cam body 21 can be within a movement envelope range of at least ±30° To achieve any angle of rotation, when the rotation angle of the cam body 21 is adjusted according to the required wheel spacing, the rotation of the rotation step is stopped, and the first nut 23 at one end of the first bolt 22 is tightened to make The first head and the first nut 23 clamp the opposite two plate surfaces of the square support structure 1 , and further fix the first bolt 22 so as not to move freely.

Referring to FIG. 5 , a suspension system provided by an embodiment of the present invention includes the wheel base adjusting device 100 as described above, and a suspension link mechanism 4 connected to the wheel base adjusting device 100 at one end.

Referring to FIG. 5 , FIG. 6 and FIG. 7 , in some embodiments, the suspension link mechanism 4 may include a suspension hinge shaft 41 passing through the first bolt 22 , the suspension hinge shaft 41 may be provided with a central through hole passing through the first shaft portion, the central through hole and the first shaft portion are in sliding clearance fit, and the suspension hinge shaft 41 is located in the through groove 214, so The suspension hinge shaft 41 can move together with the first bolt 22; the suspension link mechanism 4 can also include a suspension link 42, one end of the suspension link 42 is welded to the suspension hinge On the shaft 41, and extending from the suspension hinge shaft 41 through the slot 13 obliquely outward, its opposite end is assembled and connected with the wheel 5, and the worm mechanism 3 can be transmitted to the cam mechanism 2 by rotating. , make the cam mechanism 2 rotate around the rotation center hole 212, and then drive the first bolt 22 to slide in the chute 11, and the first bolt 22 drives the suspension hinge shaft 41 and the The suspension link 42 moves left and right together, thereby realizing the stepless adjustment of the wheel base.

Referring to FIG. 8 and FIG. 9 , in some optional embodiments, the two wheel base adjusting devices 100 may be respectively installed on opposite sides of the longitudinal beam 6 of the chassis bracket of the vehicle, and the chassis bracket longitudinal A beam 6 is located between two of the wheels 5, and a suspension linkage 4 is provided between each of the wheels 5 and the chassis bracket longitudinal beam 6, and the suspension linkage 4 The wheel 5 can be connected with the wheel base adjusting device 100. When the first bolt 22 and the suspension hinge shaft 41 move to the center position close to the chassis bracket longitudinal beam 6, the two The track between the wheels 5 decreases, and finally reaches the right limit position C, that is, the minimum limit position L of the wheel track is _short , when the first bolt 22 together with the suspension hinge shaft 41 moves away from the longitudinal direction of the chassis bracket. When the center position of the beam 6 moves, the wheel gap between the two wheels 5 increases, and finally reaches the left limit position A, that is, the maximum limit position L of the wheel track is _long .

The principles of a wheelbase adjusting device for a suspension system and a suspension system provided by the embodiments of the present invention are as follows:

Because one end of the suspension link mechanism 4 is connected with the cam mechanism 2 , the cam mechanism 2 is in driving cooperation with the worm mechanism 3 , when the worm mechanism 3 is rotated, the cam body 21 can be wound around the cam body 21 . The rotation center hole 212 on the lower part rotates, so that the first bolt 22 on the upper part of the cam body 21 drives the suspension link mechanism 4 to achieve a large distance sliding in the chute 11 together. The other end of the suspension link mechanism 4 is connected to the wheel 5. Therefore, when the suspension link mechanism 4 moves towards the direction close to the wheel 5, the wheel base of the wheel 5 can be increased. When the suspension link mechanism 4 moves in the direction away from the wheel 5, the wheel base of the wheel 5 can be reduced, and the adjustment of the larger wheel base of the suspension system can be realized, which can meet the requirements of large wheel bases of more than 20 mm. The stepless adjustment of the wheel base is used for the universal needs of the development of different levels of models, thereby reducing the development cost and development time.

In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, It is not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention. Unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection, It can also be an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or an internal connection between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

It should be noted that, in the present invention, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and are not necessarily required or implied Any such actual relationship or sequence exists between these entities or operations. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device that includes a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article or apparatus that includes the element.

The above descriptions are only specific embodiments of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims (10)

1. A track adjusting apparatus for a suspension system, comprising:

the upper part of the square supporting structure (1) is provided with a sliding chute (11), and the lower part of the square supporting structure is provided with an opening (12);

the cam mechanism (2) is mounted on the square supporting structure (1), the cam mechanism (2) comprises a cam body (21), a through hole (211) which is hinged with the sliding groove (11) through a first bolt (22) is formed in the upper portion of the cam body (21), the first bolt (22) is used for being connected with the suspension connecting rod mechanism (4), the first bolt (22) can slide in the sliding groove (11), and a rotating center hole (212) which is coaxially hinged with the opening hole (12) is formed in the lower portion of the cam body (21);

worm mechanism (3), wear to locate on square bearing structure (1), and be located the below of cam mechanism (2), worm mechanism (3) with cam mechanism (2) transmission is connected, when rotatory worm mechanism (3) time, cam mechanism (2) can wind rotatory centre bore (212) rotates.

2. The track adjusting apparatus for a suspension system according to claim 1, wherein:

the worm mechanism (3) comprises a screw rod (31), two ends of the screw rod are in threaded connection with a third nut (32) fixed on the square supporting structure (1), and a worm body (33) integrally arranged on the screw rod (31), and the worm body (33) is in transmission connection with the cam mechanism (2).

3. The track adjusting apparatus for a suspension system according to claim 1, wherein:

the upper half part of the cam body (21) is a cam, the through hole (211) is formed in the top of the cam, the lower half part of the cam body (21) is a turbine, and the rotary central hole (212) is formed in the joint of the cam and the turbine.

4. The track adjusting apparatus for a suspension system according to claim 1, wherein:

the first bolt (22) is in sliding clearance fit with the sliding groove (11), and a first nut (23) matched with the first bolt is arranged at one end of the first bolt (22).

5. The track adjusting apparatus for a suspension system according to claim 4, wherein:

the sliding groove (11) is arc-shaped, and the radian between two ends of the sliding groove (11) is at least 60 degrees.

6. The track adjusting apparatus for a suspension system according to claim 1, wherein:

the rotary central hole (212) is connected with the open hole (12) through a second bolt (24), the second bolt (24) is in sliding clearance fit with the open hole (12), and one end of the second bolt (24) is fixed through a second nut (25).

7. A suspension system, comprising:

the upper part of the square supporting structure (1) is provided with a sliding chute (11), and the lower part of the square supporting structure is provided with an opening (12);

the cam mechanism (2) is mounted on the square supporting structure (1), the cam mechanism (2) comprises a cam body (21), a through hole (211) which is hinged with the sliding groove (11) through a first bolt (22) is formed in the upper portion of the cam body (21), the first bolt (22) can slide in the sliding groove (11), and a rotary central hole (212) which is coaxially hinged with the opening hole (12) is formed in the lower portion of the cam body (21);

the worm mechanism (3) penetrates through the square supporting structure (1) and is positioned below the cam mechanism (2), the worm mechanism (3) is in transmission connection with the cam mechanism (2), and when the worm mechanism (3) is rotated, the cam mechanism (2) can rotate around the rotating central hole (212);

and one end of the suspension link mechanism (4) is assembled and connected with the wheel (5), and the other end of the suspension link mechanism is connected with the first bolt (22).

8. The suspension system of claim 7 wherein:

the suspension link mechanism (4) comprises a suspension hinge shaft (41) penetrating through the first bolt (22), the suspension hinge shaft (41) can move along with the first bolt (22), and a suspension link (42) with one end welded on the suspension hinge shaft (41), and the other end of the suspension link (42) is connected with the wheel (5).

9. The suspension system of claim 7 wherein:

the worm mechanism (3) comprises a screw rod (31), two ends of the screw rod are in threaded connection with a third nut (32) fixed on the square supporting structure (1), and a worm body (33) integrally arranged on the screw rod (31), and the worm body (33) is in transmission connection with the cam mechanism (2).

10. The suspension system of claim 7 wherein:

the sliding groove (11) is arc-shaped, and the radian between two ends of the sliding groove (11) is at least 60 degrees.

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