WO2023071470A1

WO2023071470A1 - Vehicle suspension axle distance adjustment structure and vehicle suspension

Info

Publication number: WO2023071470A1
Application number: PCT/CN2022/114285
Authority: WO
Inventors: 吴志强; 钟斌桓
Original assignee: 广东富华重工制造有限公司
Priority date: 2021-10-28
Filing date: 2022-08-23
Publication date: 2023-05-04
Also published as: CN116039291A

Abstract

A vehicle suspension axle distance adjustment structure. The vehicle suspension axle distance adjustment structure comprises a support (10), two adjusting plates (30), a cross bar, and a locking member; the support (10) comprises two side walls (11); a limiting portion (222) is provided on each side wall (11); the limiting portion (222) extends along a circular track; the center of the circle falls on an axis; the two adjusting plates (30) are respectively disposed on the outer sides of the two side walls (11); each adjusting plate (30) can rotate around the axis relative to the side wall (11); the limiting portion (222) is used for limiting the movement of the adjusting plate (30) along a plane perpendicular to the axis; the side wall (11) is provided with a first long groove (21); the adjusting plate (30) is provided with a second long groove (31); the direction of extension of the second long groove (31) intersects the direction of extension of the first long groove (21); one of the side wall (11) and the adjusting plate (30) is provided with a plurality of first matching portions, and the other is provided with a second matching portion; the cross bar passes through the first long grooves on the two side walls (11) and the second long grooves on the two adjusting plates (30). The adjusting plates (30) will not be displaced due to the movement of a vehicle, and adjustment precision is improved. Also provided is a vehicle suspension.

Description

Vehicle Suspension Adjustment Structure of Axle and Wheelbase and Vehicle Suspension

technical field

The invention relates to the technical field of vehicles, in particular to an adjustment structure for vehicle suspension axles and wheelbases and vehicle suspension.

Background technique

The vehicle suspension is a force transmission device installed between the frame and the axle, which is used to transmit the force acting between the wheels and the frame, and to buffer the impact on the frame when the vehicle is running on an uneven road. To reduce the vibration of the vehicle body and ensure the safety and comfort of the vehicle. At present, the suspension of high-end commercial vehicles mostly adopts the air suspension system. When assembling the air suspension and the frame, it is necessary to ensure that the axles are parallel to each other, so as to reduce the driving resistance of the vehicle as much as possible. Through some complicated assembly processes , although it can ensure that each axle has a high degree of parallelism, but during the driving process of the vehicle, due to the vibration and wear of parts, the parallelism between the axles will change, resulting in the deviation of the wheel angle and the increase of driving resistance. , and accelerate the wear of the wheel.

In order to change the above-mentioned defects, Chinese patent CN102490561B proposes a device for adjusting the wheelbase of the automobile suspension axle, which can pull the bolts installed on the support plate by moving the adjusting plate when the axle is deflected, and use the bolts to pull the suspension main body. beam, thereby changing the position of the axle mounted on the suspension main beam, and finally achieving the purpose of adjusting the angle of the axle. In this patent, when adjusting the position of the bolt, the adjustment plate is moved up and down, and the inclined hole on the adjustment plate is used to push the bolt to move laterally. Finally, the self-locking nut is used to press the adjustment plate on the support plate to make the adjustment plate and the support Although it can achieve the purpose of adjusting the axle angle, the adjustment plate is fixed to the support plate by pressing the self-locking nut. During the driving process of the vehicle, the self-locking nut is easy to loosen, and the self-locking nut is slightly loose. When it is disengaged, the adjustment plate will shake, so that there is a certain movable gap in the bolt. In this way, the axle shakes thereupon, which will still cause the wheel resistance to increase, and even affect the safety of the driving form of the vehicle.

Contents of the invention

Aiming at the deficiencies of the prior art, the first object of the present invention is to propose an adjustment structure for vehicle suspension axles and wheelbases, which can adjust the parallelism of the axles and avoid shaking of the axles during the running of the vehicle.

The second object of the present invention is to propose a vehicle suspension.

To achieve the above object one, the present invention adopts the following technical solutions:

The adjustment structure of the axle and wheelbase of the vehicle suspension, including a bracket, two adjustment plates, a cross bar and a locking piece;

The bracket includes two opposite side walls, and a limiting part is arranged on the outer surface of the side walls. The limiting part extends along a circular track, and the center of the circle falls on an axis extending along the thickness direction of the side wall. The adjustment plates are respectively placed on the outer sides of the two side walls, the adjustment plates can rotate around the axis relative to the side walls, and the limit part is used to limit the freedom of movement of the adjustment plate along the plane perpendicular to the axis;

The side wall is provided with a first long groove extending transversely and located inside the limiting part, and the adjusting plate is provided with a second long groove, the extending direction of the second long groove intersects the extending direction of the first long groove, and the first long groove The center lines of the long groove and the second long groove are both staggered from the axis;

One of the side wall and the adjusting plate is provided with a plurality of first matching parts, and the other is provided with a second matching part, and the plurality of first matching parts are arranged around the axis; when the adjusting plate is attached to the side wall from outside to inside, the first matching part The two matching parts cooperate with one of the first matching parts to form a limit assembly that prevents the adjustment plate from rotating around the axis;

The cross bar passes through the first long groove on the two side walls and the second long groove on the two adjustment plates, and one end forms a raised portion, which is pressed on the outer surface of one of the adjustment plates, and the locking piece is detachable It is fixed on the other end of the cross bar and pressed on the outer surface of another adjusting plate.

The outer surface of the side wall is provided with a circular rib, the inner edge of the rib forms a limiting part, and the inner edge of the rib and the outer surface of the side wall form a groove, and the adjusting plate is embedded in the groove. in the slot.

The first matching portion is a slot recessed from the outer surface of the rib toward the inner side of the bracket, and the second matching portion is a flange extending outward from the outer peripheral edge of the adjusting plate and matching the slot.

A plurality of card slots are arranged in a circular array around the axis, and a plurality of flanges are provided on the adjustment plate, the number of flanges is b, and the number of card slots is c, wherein c is an integer multiple of b.

Both the first long groove and the second long groove are waist-shaped grooves.

The cross bar is a bolt, the protruding part is a nut of the bolt, and the locking piece is screwed to the nut on the bolt.

The nut is provided with a plurality of through grooves passing through the threaded surface and the outer peripheral surface, and the through grooves extend from one end of the nut to the other end.

A washer is sandwiched between the nut of the bolt and one of the adjusting plates, and between the nut and the other adjusting plate.

The inner sides of the two side walls of the bracket are respectively provided with a wear-resistant plate. The wear-resistant plate is provided with a hole for the cross bar to pass through. Hooks on the wall.

For realizing above-mentioned object two, the present invention adopts following technical scheme:

The vehicle suspension includes the above-mentioned adjustment structure of the vehicle suspension axle and wheelbase.

The beneficial effects of the present invention are:

Compared with the prior art, the adjustment structure of the present invention can adjust the position of the axle, and then adjust the parallelism of the axle. Avoid shaking the axle and increase the resistance of the wheel; in addition, when assembling and adjusting, as long as the angle of the adjusting plate is fixed, the position of the axle can be fixed, thereby improving the accuracy of adjustment.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a structural schematic diagram of the fixing seat in Fig. 1;

Fig. 3 is the structural representation of adjusting plate in Fig. 1;

Fig. 4 is a kind of working state schematic diagram of the present invention;

Fig. 5 is another kind of working state schematic diagram of the present invention;

Fig. 6 is another kind of working state schematic diagram of the present invention;

Fig. 7 is a schematic structural diagram of the nut in Fig. 1 .

Detailed ways

Below, in conjunction with accompanying drawing and specific embodiment, the present invention will be further described:

As shown in Figures 1, 2, and 3, it is an adjustment structure for vehicle suspension axles and wheelbases according to the present invention, which includes a bracket 10, two adjustment plates 30, bolts 50 and nuts 60, and the bracket 10 is fixedly welded on the vehicle frame. , which is processed by sheet metal. In the figure, the X direction is the length direction of the bracket 10 (ie, the length direction of the vehicle frame), the Y direction is the width direction of the bracket 10 (ie, the width direction of the vehicle frame), and the Z direction is The height direction of the support 10 (ie the height direction of the vehicle frame); The fixed seat 20, the fixed seat 20 is disc-shaped as a whole, and the first long groove 21 extending laterally (that is, extending along the X direction in the figure) is opened on the fixed seat 20; the two adjusting plates 30 are respectively located on the two side walls 11, specifically, the adjustment plate 30 is located outside the fixed seat 20 on the side wall 11, the adjustment plate 30 can rotate relative to the fixed seat 20 around an axis O, and the axis O extends along the thickness direction of the side wall 11, that is, The Y direction in the illustration is consistent; a circle of circular ribs 22 is provided on the periphery of the outer surface of the fixing seat 20, and the inner edge surface of the ribs 22 forms a limiting portion 222, that is, the limiting portion 222 is circular, The adjustment plate 30 can be placed in the groove surrounded by the rib 22 and the outer surface of the side wall 11, and the adjustment plate 30 can rotate around the above-mentioned axis O in the groove relative to the fixed seat 20, that is, relative to the side wall 11 rotation, the center of circle of the limiting part 222 falls on the above-mentioned axis O, so that when the adjustment plate 30 is located in the groove, it can have the degree of freedom to rotate relative to the fixed seat 20, and the outer edge of the adjustment plate 30 can be The surface 32 is set to a circular shape whose shape is consistent with the internal shape of the rib 22, so that when the adjusting plate 30 can rotate relative to the fixed seat 20, the stopper 222 formed by the inner edge surface of the rib 22 can again The adjustment plate 30 acts as a limiter to limit the movement of the adjustment plate 30 along a plane perpendicular to the axis O, that is to say, to prevent the adjustment plate 30 from moving relative to the side wall 11 along the plane XZ, so that only adjustment is allowed. The plate 30 can rotate around the axis O, and at the same time, the adjusting plate 30 can be inserted into the groove from the outside of the groove along the Y direction through the opening of the groove; the adjusting plate 30 is provided with a second long groove 31; The extending direction of the groove 31 intersects the extending direction of the first long groove 21 , and the centerline 211 of the first long groove 21 and the centerline 311 of the second long groove 31 are both offset from the axis O by a certain distance. In addition, the fixed base 20 and the adjusting plate 30 are respectively provided with a first matching portion and a second matching portion, and the first matching portion and the second matching portion cooperate to enable the adjusting plate 30 to be placed on the fixing base 20 according to different angles, and When the adjustment plate 30 is at different angles, it can form a limit assembly to prevent the adjustment plate 30 from rotating relative to the fixed base 20 when it is in a corresponding position, that is to limit the degree of freedom of the adjustment plate 30 to rotate around the axis O. Specifically, a plurality of first fitting parts are provided on the raised rib 22, and the first fitting part is specifically a draw-in groove 23 formed by the outer surface of the raised rib 22 being recessed toward the inner side of the bracket 10, and the second fitting part is formed by an adjusting plate. The flange 33 extending outward from the periphery of 30, the flange 33 can be snapped into one of the card slots 23 in a matching manner, so that the two sides of the card slot 23 can be used to limit the position of the flange 33, and the adjustment plate 30 can be limited. The purpose of rotational degrees of freedom. The bolt 50 traverses the bracket 10 along the Y direction, and passes through the first long slot 21 on the fixing seat 20 on both sides of the bracket 10 and the second long slot 31 on the adjusting plate 30, and the nut 51 of the bolt 50 is pressed on the On the outside of one of the adjusting plates 30, the nut 60 is screwed on the other end of the bolt 50 and is pressed on the outside of the other adjusting plate 30, and the two adjusting plates 30 are respectively compressed by the nut 51 and the nut 60 of the bolt 50, so as to define The degree of freedom for the two adjustment plates 30 to move away from the bracket 10 along the Y direction is increased. In addition, a hole 12 with a larger inner diameter is respectively set on the two side walls 11 of the bracket 10, so as to adjust the lateral position of the bolt 50. Avoid the bolt 50. During assembly, the bolt 50 passes through the adjusting plate 30, the fixing seat 20 on one side, and the fixing seat 20 and the adjusting plate 30 on the other side in sequence, and then tighten the nut 60 to compress the adjusting plates 30 on both sides. In the groove formed on the fixing seat 2.

Referring to Fig. 4, when installing for the first time, make the extension direction of the second long groove 31 of the adjustment plate 30 consistent with the Z direction, install the adjustment plate 30 in the groove of the fixing seat 20, and make the adjustment plate 30 The flange 33 is snapped into the draw-in groove 23 by the opening of the draw-in groove 23 facing the flange 33, and the nut 60 is tightened so that the adjusting plate 30 is compressed. At this time, the adjusting plate 30 remains fixed with the fixing seat 20. , the length direction of the second long groove 31 is perpendicular to the length direction of the first long groove 21, and the isomorphic second long groove 31 defines the degree of freedom of the bolt 50 in the X direction, so that the bolt 50 is limited in the first long groove The bolt 50 is fixed at the position in the middle of 21 , that is, the area where the first long slot 21 and the second long slot 31 overlap. Referring to Fig. 5, when the axle shaft needs to be adjusted to the left, loosen the nut 60, rotate the adjusting plate 30 clockwise around the axis O by a certain angle, and make the flange 33 engage with the card facing it. In the groove 23, when the adjustment plate 30 rotates, because the centerline of the second long groove 31 is staggered by a certain distance from the axis O, that is, the second long groove 31 is eccentrically arranged on the adjustment plate 30, therefore, the second The side edge of the long groove 31 will press the bolt 50 to the left, so that the bolt 50 will move a certain distance to the left along the first long groove 21, and then the bolt 50 will be used to pull the rotating main beam to the left for a certain distance, and hang the bolt 50 on the main beam. The axle shaft moves a corresponding distance to the left, and finally the nut 60 is tightened to complete the adjustment. At this time, the area where the first long groove 21 and the second long groove 31 overlap is fixed to the bolt 50, and the area where the two overlap is offset to the first The left side of long groove 21. Referring to Fig. 6, when the axle needs to be adjusted to the right, loosen the nut 60, and rotate the adjusting plate 30 around the axis O at a certain angle counterclockwise, so that the flange 33 snaps into the slot 23 facing it, The side edge of the second long groove 31 presses the bolt 50 to the right, so that the axle shaft moves to the right for a certain distance, and finally the nut 60 is tightened, so that the overlapping area of the first long groove 21 and the second long groove 31 is shifted to the first long groove 31. The right side of a long groove 21 is fixed with the bolt 50, the distance of axle adjustment, through the rotation angle of the adjustment plate 30 relative to the fixed seat 20, in actual use, the rotation angle of the adjustment plate 30 can be determined according to the parallelism of the axle , and then determine which slot 23 on the fixing base 20 the flange 33 on the adjusting plate 30 needs to be snapped into.

In the above solution, by setting a circle of circular ribs 22 on the fixed seat 20, the inner edge surface of the ribs 22 is used to form the limit portion 222, which limits the degree of freedom of the adjustment plate 30 sliding on the plane XZ, while ensuring The adjustment plate 30 can rotate around the axis O. In addition, a plurality of slots 23 are provided on the rib 22 as a plurality of first matching parts, and a flange 33 is provided on the adjustment plate 30 as a second matching part matching the first matching part. part, because the flange 33 and the slot 23 are assembled along the Y direction in the figure, that is, the adjustment plate 30 and the fixed seat 20 have a certain matching dimension in the Y direction, and since the adjustment plate 30 is embedded in the slot 23, the adjustment The outward displacement distance of the plate 30 must be greater than the depth of the clamping groove 23, and the limit assembly formed by the cooperation of the flange 33 and the clamping groove 23 will fail, that is, the limiting effect of the adjusting plate 30 on the bolt 50 will fail, and then cause The bolt 50 rocks back and forth along the length direction of the first long groove 21, that is to say, even if the nut 60 is slightly loosened, the adjusting plate 30 will still be limited by the fixed seat 20 and will not rotate relative to the fixed seat 20, so as to be compatible with the fixed seat 20. The position of the bolt 50 is stably matched with the seat 20; on the other hand, when assembling or adjusting the position of the axle, tighten the nut 60, because the rotation angle of the adjusting plate 30 is limited by the fixed seat 20, therefore, during the process of tightening the nut 60 , the adjustment plate 30 will not follow the rotation, thus will not affect the adjustment accuracy, that is, as long as the adjustment plate 30 is rotated to the corresponding angle, the position of the bolt 50 will be fixed, and tightening the nut 60 will not change the position of the bolt 50. In short, compared with the prior art, the adjustment structure of the present invention can adjust the position of the axle, and then adjust the parallelism of the axle, and the adjustment plate will not be displaced due to the movement of the vehicle, so that the axle can be kept fixed , thereby avoiding the shaking of the axle and the increase of wheel resistance; in addition, when assembling and adjusting, as long as the angle of the adjusting plate is fixed, the position of the axle can be fixed, thereby improving the accuracy of adjustment.

In other embodiments, the limiting part, the first matching part, and the second matching part of the present invention may also adopt other structural forms, for example, a plurality of protrusions may be protruding from the fixing seat, and the plurality of The bosses are arranged according to a circular trajectory, and the center of the circle falls on the axis O. Correspondingly, there are multiple through holes arranged on the adjustment plate, and the multiple through holes are also arranged according to the above circular trajectory. The protrusions are connected in a plurality of through holes in a one-to-one correspondence. When the adjustment plate 30 is rotated, the corresponding relationship between the protrusions and the through holes can be changed to change the matching angle between the adjustment plate 30 and the fixed seat 20, and when changing the angle Finally, it is possible to prevent the adjustment plate 30 from rotating relative to the fixed seat 20, and the boss and the through hole form a first fitting portion and a second fitting portion, and the surface of the boss fits with the inner wall surface of the through hole, preventing the adjustment plate 30 from moving on the XZ plane. As for the movement, the limiting part can be regarded as being surrounded by the parts of the surfaces of the plurality of protrusions close to the axis O.

In another embodiment, the above-mentioned ribs 22 may also be directly provided on the outer surface of the side wall 11 of the bracket 10 , or it may be considered that the fixing seat is integrally formed with the side wall 11 of the bracket 10 . Of course, it is also possible not to provide ribs on the side wall 11, but to open a plurality of limiting grooves around the axis O on the side wall 11, and use the limiting grooves to form the above-mentioned first matching part, and the second matching part is It can be regarded as bending the above-mentioned flange 33 toward the side wall 11, so that the flange 33 can be inserted into the corresponding limiting groove, so that the adjustment plate 30 and the side wall 11 remain fixed. When adjustment is required, change the protrusion The corresponding relationship between the edge 33 and the limiting groove on the side wall 11 is sufficient.

In the present invention, a plurality of card slots 23 are arranged in a circular array around the axis O, and a plurality of flanges 33 can be arranged on the adjustment plate 30, so that when the adjustment plate 30 is fixed, the plurality of flanges 33 are respectively aligned with the corresponding card Groove 23 cooperates, can disperse stress, prolong the service life of regulating plate 30; The quantity of concrete flange 33 is b, the quantity of card groove 23 is c, and wherein c is the integral multiple of b; For example, can be set 16 cards Slots 23 are provided with four flanges 33 correspondingly. In this way, the size of the offset angle a between adjacent slots 23 is 22.5°, that is, when the adjustment plate 30 does not rotate the position of a slot 23, its rotation angle is 22.5°, the more the number of slots 23 is distributed, the smaller the angle of rotation is when the adjustment plate 30 does not rotate a position of the slot, and the distance that the bolt 50 is pulled is also smaller, that is to say, the slot The more the number of 23, the higher the accuracy of adjustment.

In order to prevent the bolt 50 from being stuck, so that the bolt 50 can move smoothly in the first long groove 21 and the second long groove 31, the first long groove 21 and the second long groove 31 of the present invention are all set as waist Waist-shaped groove, the waist-shaped groove is a groove with a rectangular shape in the middle and a semicircular shape at both ends. The bolt 50 of the present invention is used to cross the support 10, the adjusting plate 30, and the fixing seat 20, and it is also installed on one end of the suspension main beam at the same time, and it is used to pull the suspension main beam when adjusting the parallelism of the axle. Use other bar-shaped components, not necessarily bolts, correspondingly, a raised portion is provided at one end of the bar to press one of the adjusting plates 30, and a locking plate is detachably fixed at the other end of the bar. Another regulating plate 30 is set by pressing the piece, which plays the same role as the nut 60.

Referring to Fig. 7, in order to prevent the nut 60 from loosening, a plurality of through grooves 61 can be set on the nut 60 through its threaded surface and outer peripheral surface, the through grooves 61 extend from one end of the nut 60 to the other end, and the nut can be The part between the adjacent two through grooves 61 on the 60 is extruded to the central axis of the nut 60, so that this part has a certain inclination angle, so that after the nut 60 is screwed on the bolt 50, the nut 60 can be realized. Self-locking, thereby preventing the nut 60 from loosening. A washer 70 is clamped between the nut 51 of the bolt 50 and one of the adjusting plates 30 , and between the nut 60 and the other adjusting plate 30 , so as to prevent the adjusting plate 30 from being worn when the nut 60 is screwed.

In addition, a wear-resistant plate 80 is provided on the inner surfaces of the two side walls 11 of the bracket 10 respectively. The wear-resistant plate 80 is provided with holes for the bolts 50 to pass through. A groove 13 is provided at the bottom of the side wall 11. The wear-resistant plate 80 There is a hook 81 on the top, the hook 81 passes through the groove 13 at the bottom of the side wall 11 and extends to the outside of the side wall 11 and is hooked on the side wall 11. When adjusting the position of the axle, the wear plate 80 can move with the bolt 50 , the wear-resistant plate 80 cooperates with the suspension main beam installed on the bolt 50 to prevent the suspension main beam from causing wear to the bracket 10 .

The vehicle suspension of the present invention includes the above-mentioned adjusting structure of the axle and wheelbase of the vehicle suspension, and other structures of the suspension are the same as those of the prior art.

The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that it can still be described in the foregoing embodiments Modifications are made to the recorded technical solutions, or equivalent replacements are made to some of the technical features, and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

The adjustment structure of the vehicle suspension axle wheelbase is characterized in that it includes a bracket, two adjustment plates, a cross bar and a locking piece;

The bracket includes two opposite side walls, and a limiting portion is provided on the outer surface of the side walls, and the limiting portion extends along a circular trajectory, and the center of the circle falls on a direction along the thickness direction of the side wall. On the extended axis, two adjusting plates are placed on the outer sides of the two side walls respectively, the adjusting plates can rotate around the axis relative to the side walls, and the limiting part is used to limit the adjustment plate along the degrees of freedom of movement in a plane perpendicular to said axis;

The side wall is provided with a first long groove extending transversely and located inside the limiting part, and the regulating plate is provided with a second long groove, and the extending direction of the second long groove is the same as that of the first long groove. The extension directions of the long grooves intersect, and the centerlines of the first long groove and the second long groove are both staggered from the axis;

One of the side wall and the adjusting plate is provided with a plurality of first matching parts, while the other is provided with a second matching part, and a plurality of the first matching parts are arranged around the axis; on the adjusting plate When abutting against the side wall from the outside to the inside, the second matching part cooperates with one of the first matching parts to form a limit assembly that prevents the adjustment plate from rotating around the axis;

The cross bar passes through the first long grooves on the two side walls and the second long grooves on the two adjustment plates, and one end of the cross bar forms a raised portion, and the raised portion is pressed into a hole in the adjustment plate. The outer surface of one of the adjustment plates is detachably fixed on the other end of the cross bar and pressed on the outer surface of the other adjustment plate.
The vehicle suspension axle wheelbase adjustment structure according to claim 1, characterized in that, the outer surface of the side wall is provided with a circular rib, and the inner edge surface of the rib forms the limiting part, And the inner edge surface of the rib and the outer surface of the side wall enclose a groove, and the adjusting plate is embedded in the groove.
The vehicle suspension axle wheelbase adjustment structure according to claim 2, characterized in that, the first matching part is a draw groove that is recessed from the outer surface of the raised rib toward the inner side of the bracket, and the second The matching portion is a flange extending outward from the outer peripheral edge of the adjusting plate and matched with the slot.
The vehicle suspension axle wheelbase adjustment structure according to claim 3, characterized in that, a plurality of said clamping grooves are arranged in a circular array around said axis, and said adjustment plate is provided with a plurality of flanges, The number of the flanges is b, and the number of the slots is c, wherein c is an integer multiple of b.
The vehicle suspension axle wheelbase adjustment structure according to claim 1, characterized in that, the first long groove and the second long groove are waist-shaped grooves.
The vehicle suspension axle wheelbase adjustment structure according to claim 1, characterized in that the cross bar is a bolt, the raised portion is a nut of the bolt, and the locking member is screwed on the bolt. Nuts on the above bolts.
The adjusting structure of vehicle suspension axle wheelbase according to claim 6, characterized in that, the nut is provided with a plurality of through grooves penetrating through its threaded surface and outer peripheral surface, and the through grooves extend from one end of the nut to Extend the other end.
The adjusting structure of vehicle suspension axle wheelbase according to claim 6, characterized in that, the nut of the bolt and one of the adjusting plates, and the nut and the other adjusting plate are both Holds a spacer.
The vehicle suspension axle wheelbase adjustment structure according to claim 1, characterized in that, a wear-resistant plate is provided on the inner side of the two side walls of the support, and a wear-resistant plate is provided on the wear-resistant plate for the cross bar to pass through. The wear-resistant plate is provided with a hook extending from the bottom of the side wall to the outer surface of the side wall and hooked on the side wall.
The vehicle suspension is characterized by comprising the vehicle suspension axle wheelbase adjustment structure according to any one of claims 1-9.