CN106799946B

CN106799946B - suspension lifting adjusting device

Info

Publication number: CN106799946B
Application number: CN201510844837.9A
Authority: CN
Inventors: 王平; 叶文周; 蒋柏林; 吕高峰; 王刚
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2015-11-26
Filing date: 2015-11-26
Publication date: 2019-12-10
Anticipated expiration: 2035-11-26
Also published as: CN106799946A

Abstract

The invention discloses a suspension lifting adjusting device which comprises an adjusting assembly, wherein the adjusting assembly is connected with a lower spring seat of a suspension to drive the lower spring seat to move along the vertical direction. According to the suspension lifting adjusting device provided by the embodiment of the invention, the position of the vehicle body is adjusted by adjusting the position of the lower spring seat in the vertical direction, the stress point of the shock absorber is not changed, the structure is simple, the manufacturing cost is low, and the application range is wide.

Description

Suspension lifting adjusting device

Technical Field

The invention relates to the technical field of vehicle suspensions, in particular to a suspension lifting adjusting device.

Background

in the related art, the suspension lifting adjustment device is realized by a hydraulic structure, for example, one of the suspension lifting adjustment devices is that a hydraulic cavity is additionally arranged at the upper end or the lower end of a shock absorber, the length of the shock absorber is changed by pressurizing or decompressing the hydraulic cavity, so that a vehicle body is lifted or lowered, the other suspension lifting adjustment device is that a connecting support connected with a steering knuckle is made into a sealed cavity, a piston is fixed at the lower end of an outer cylinder of the shock absorber, the cavity formed by the connecting support is divided into an upper cavity and a lower cavity, and the length of the shock absorber is changed by pressurizing or decompressing the upper cavity and the lower cavity, so that the vehicle body is lifted or lowered.

That is to say, above-mentioned suspension lift adjusting device who realizes suspension height adjustment through hydraulic structure, the automobile body is raised or the total length that the scheme all has changed the shock absorber, has connected a device on the shock absorber outward, can change the stress point of shock absorber, influences the shock absorber life-span, and its no locking mechanism moreover, need last pressurize in order to keep the height unchangeable, its oil feeding system need work all the time, economic nature is poor, and the noise is big, and need arrange high pressure fuel pipe, has the fluid leakage risk, and the polluted environment, exists the improvement space.

disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the invention provides a suspension lifting adjusting device which does not change the stress point of a shock absorber, has a simple structure and is low in manufacturing cost.

According to the embodiment of the invention, the suspension lifting adjusting device comprises: and the adjusting assembly is connected with the lower spring seat of the suspension to drive the lower spring seat to move along the up-down direction.

According to the suspension lifting adjusting device provided by the embodiment of the invention, the purpose of adjusting the position of the lower spring seat in the vertical direction is realized by driving the lower spring seat to move in the vertical direction through the adjusting assembly, so that the position of a vehicle body in the vertical direction can be adjusted, the vehicle body is lifted or lowered, and the driving requirements of vehicles on different road conditions are met.

According to one embodiment of the invention, the adjustment assembly comprises: a drive assembly; and the transmission assembly is connected with the driving assembly, and the driving assembly drives the lower spring seat to move in the up-and-down direction through the transmission assembly.

according to one embodiment of the invention, the transmission assembly comprises: the axial direction of the first transmission piece is parallel to the up-down direction; and the second transmission piece is connected with the driving component and is arranged to rotate around the axial direction under the driving of the driving component and move along the axial direction so as to push the lower spring seat to move along the up-and-down direction.

according to an embodiment of the invention, the adjustment assembly further comprises a guide assembly, the guide assembly comprises a guide sleeve and a guide ring, one of the guide sleeve and the guide ring is fixed on the first transmission piece, and the other of the guide sleeve and the guide ring is fixed on the lower spring seat; one of the guide groove and the guide protrusion is arranged on one of the guide sleeve and the guide ring, the other of the guide groove and the guide protrusion is arranged on the other of the guide sleeve and the guide ring, and the guide groove extends along the vertical direction.

according to one embodiment of the invention, the transmission assembly comprises a spindle nut pair, the spindle of which forms the first transmission element, the nut of which forms the second transmission element, and the guide ring is fastened to the spindle.

according to one embodiment of the invention, the screw comprises: a lead screw portion engaged with the nut; the fixed part is fixedly connected with the screw rod part, the fixed part is constructed into a column body, and the guide ring is sleeved and fixed on the column body.

according to an embodiment of the invention, the lead screw further comprises: the stop flange is arranged at one end of the screw rod part and extends outwards along the radial direction of the column body and exceeds the outer peripheral edge of the screw rod part.

According to one embodiment of the invention, the stop flange is sleeved and welded on the column body; or the stop flange and the screw rod part are integrally formed and are fixed on the column body through a clamp spring.

according to one embodiment of the invention, the column is a hollow or solid column.

According to one embodiment of the invention, the column is a hollow column, a part of the cylinder block of the shock absorber of the suspension constituting the hollow column.

According to one embodiment of the invention, the drive assembly comprises: a worm gear coaxially fixed to the nut; a worm engaged with the worm gear; the manual rocker is connected with the worm so as to be suitable for driving the worm to rotate.

According to one embodiment of the invention, the adjustment assembly further comprises a locking assembly for locking the unsprung portion in any position within the range of motion of the unsprung portion.

According to one embodiment of the invention, one end of the worm is provided with a locking groove extending in a radial direction of the worm; the locking assembly includes: the locking ring is fixed on the lower spring seat and sleeved outside the worm; a locking bolt adapted to pass through a portion of the peripheral wall of the locking ring in order, the locking groove being fixed to another portion of the locking ring.

According to an embodiment of the present invention, the suspension raising and lowering adjusting device further includes: and the thrust bearing is clamped between the nut and the lower spring seat and between the worm wheel and the lower spring seat.

According to one embodiment of the invention, the lower spring seat is fixed with the guide sleeve through a connecting sleeve, and the connecting sleeve is sleeved and fixed outside the guide sleeve; the thrust bearing with it is equipped with the guide holder to press from both sides between the connecting sleeve, just the guide holder cover is established outside the lead screw.

According to an embodiment of the present invention, the suspension raising and lowering adjusting device further includes: the connecting piece, the connecting piece respectively with spring lower carriage with the nut links to each other, the lock ring is fixed on the connecting piece, the both ends of worm are in through the bearing support respectively on the connecting piece, footstep bearing thrust bearing the guide holder worm wheel with the worm is located the connecting piece spring lower carriage with in the space that the nut was injectd.

According to one embodiment of the invention, the nut is provided with a flange part, and the flange part and the worm wheel are fixed through a threaded fastener; or the nut and the worm wheel are fixed through a fixing structure, the fixing structure comprises a protrusion and a groove, the protrusion is matched with the groove, the protrusion is arranged on one of the nut and the worm wheel, and the groove is arranged on the other of the nut and the worm wheel.

According to one embodiment of the invention, the drive assembly comprises: a worm gear coaxially fixed to the nut; a worm engaged with the worm gear; and the driving motor is connected with the worm so as to be suitable for driving the worm to rotate.

According to one embodiment of the invention, the drive assembly comprises: a driving pulley; the driven belt wheel and the driving belt wheel are in transmission through a transmission belt, and the driven belt wheel is coaxially fixed on the nut; and the driving motor is connected with the driving belt wheel to be suitable for driving the driven belt wheel to rotate through the transmission belt.

Drawings

Fig. 1 is a sectional view of a suspension raising and lowering adjustment apparatus according to an embodiment of the present invention;

Fig. 2 is a schematic structural view of a worm wheel and a worm of the suspension elevation adjusting apparatus according to the present invention;

FIG. 3 is a cross-sectional view of one embodiment of a lead screw nut pair of a suspension adjust device according to the present invention;

FIG. 4 is a top view of one embodiment of a lead screw nut pair of a suspension adjust device according to the present invention;

FIG. 5 is a cross-sectional view of another embodiment of a lead screw nut pair of a suspension adjustment device according to the present invention;

FIG. 6 is a top view of another embodiment of a lead screw nut pair of a suspension adjust device according to the present invention;

Fig. 7 is a schematic structural view of a thrust bearing of the suspension fork lift adjusting apparatus according to the present invention;

Fig. 8 is a front view of a guide shoe of the suspension fork lift adjustment apparatus according to the present invention;

Fig. 9 is a plan view of a guide shoe of the suspension fork lift adjustment apparatus according to the present invention;

Fig. 10 is a sectional view of a guide sleeve of the suspension fork lift adjustment apparatus according to the present invention;

Fig. 11 is a sectional view of a guide ring of the suspension fork lift adjustment apparatus according to the present invention;

Fig. 12 is a plan view of a guide ring of the suspension fork lift adjustment apparatus according to the present invention;

fig. 13 is a schematic structural view of a circlip of the suspension elevation adjustment apparatus according to the present invention;

fig. 14 is a sectional view of a coupling sleeve of the suspension fork lift adjustment apparatus according to the present invention;

FIG. 15 is a schematic view of the arrangement of the unsprung mass with the spring center axis offset from the damper center axis of the suspension;

FIG. 16 is a schematic view of the spring center axis of the unsprung mass offset and angled from the damper center axis of the suspension;

FIG. 17 is a schematic structural view of a manual rocker of the suspension adjustment device according to the present invention;

fig. 18 is a sectional view of a suspension raising and lowering adjusting device according to another embodiment of the present invention.

Reference numerals:

the suspension lifting adjusting device 1000, the lower spring seat 2000, the spring 3000, the cylinder body 4000 of the shock absorber, the fixing plate 5000, the adjusting assembly 100, the driving assembly 1, the worm wheel 11, the groove 111, the worm 12, the locking groove 121, the manual rocker 13, the rotating shaft 131, the rocker arm 132, the transmission assembly 2, the first transmission piece 21, the second transmission piece 22, the lead screw 23, the lead screw portion 231, the fixing portion 232, the stopping flange 233, the snap spring groove 2331, the nut 24, the flange portion 241, the fastening hole 1, the protrusion 242, the snap spring 24125, the guide assembly 3, the guide sleeve 31, the guide groove 311, the guide ring 32, the guide protrusion 321, the locking assembly 4, the locking ring 41, the locking bolt 42, the thrust bearing 51, the connecting piece 52, the guide seat dust cover 53, the connecting sleeve 54, the first dust cover 61, the second dust cover 62, the connecting bolt 63, the bearing 71.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

A suspension is the generic term for all force-transmitting connections between a vehicle frame (or load-bearing body) and an axle (or wheel). The suspension generally comprises an elastic element, a damping element, a force transmission mechanism or guide structure and a lateral stabilizer. The elastic element, such as the spring 3000, can play a role in buffering, the damping element, such as the damper, can play a role in damping, the force transmission mechanism plays a role in transmitting force and guiding, and the transverse stabilizing device prevents the vehicle body from generating excessive roll.

The height of the vehicle body can be raised and lowered by adjusting the suspension. A suspension raising and lowering adjusting device 1000 according to an embodiment of the present invention is described below with reference to fig. 1 to 18.

as shown in fig. 1 to 18, a suspension raising and lowering adjusting apparatus 1000 according to an embodiment of the present invention includes an adjusting assembly 100, and the adjusting assembly 100 is connected to an unsprung portion 2000 of a suspension to drive the unsprung portion 2000 to move in an up-and-down direction.

It will be appreciated that the unsprung portion 2000 is used to support the spring 3000, that the spring 3000 may be disposed between the unsprung portion 2000 and the vehicle body, or that the spring 3000 may be supported between the unsprung portion 2000 and the vehicle axle. The spring 3000 has a stiffness, and when the spring 3000 is stressed for a certain time, the length of the spring 3000 is matched with the stressed length, and at this time, because the length of the spring 3000 is fixed, the position of the lower spring seat 2000 in the up-down direction can be changed, and the position of the vehicle body in the up-down direction can be changed.

According to the suspension lifting adjusting device 1000 of the embodiment of the invention, the adjusting assembly 100 drives the lower spring seat 2000 to move in the vertical direction, so that the aim of adjusting the vertical position of the lower spring seat 2000 through the adjusting assembly 100 is fulfilled, the vertical position of the vehicle body can be adjusted, the vehicle body is lifted or lowered, the driving requirements of the vehicle on different road conditions are met, for example, when the vehicle runs at high speed, the wind resistance can be reduced by lowering the height of the vehicle body, the operation stability can be improved, and when the vehicle runs on uneven road surfaces, the height of the vehicle body can be raised, and the obstacle crossing capability of the vehicle can be improved.

In addition, according to the suspension lifting adjusting device 1000, the position of the lower spring seat 2000 in the vertical direction is adjusted through the adjusting assembly 100, the circumferential direction position of the spring 3000 cannot be changed, namely, under the condition that the lateral force direction of the spring is not changed, the position of the lower spring seat 2000 in the vertical direction is only adjusted, so that the purpose of lifting or lowering the height of a vehicle body is achieved, hard points (stress points) after the shock absorber is assembled cannot be changed, meanwhile, the suspension lifting adjusting device 1000 can also be used for a shock absorber without lateral force and a suspension form in which the shock absorber and the spring 3000 are separated, the cost is lower compared with that of the air spring 3000, and the suspension lifting adjusting device is easier to popularize and apply on B-level and.

A suspension raising and lowering adjusting device 1000 according to an embodiment of the present invention is described in detail below with reference to fig. 1 to 18. The suspension lift adjustment apparatus 1000 as shown in fig. 1-18 includes an adjustment assembly 100. The adjustment assembly 100 includes a drive assembly 1, a transmission assembly 2, a guide assembly 3, and a locking assembly 4.

The transmission assembly 2 is connected to the driving assembly 1, so that the driving assembly 1 drives the unsprung seat 2000 to move in the up-down direction through the transmission assembly 2, the locking assembly 4 is used for locking the unsprung seat 2000 at any position within the movement range of the unsprung seat 2000, the unsprung seat 2000 can move between the first position and the second position in the up-down direction, the movement range of the unsprung seat 2000 is between the first position and the second position, namely, the adjustment stroke of the suspension lifting adjusting device 1000 is the distance between the first position and the second position, and the locking assembly 4 can lock the unsprung seat 2000 at any position among the first position, the second position and the first position and the second position.

As shown in fig. 1 and 18, the transmission assembly 2 includes a first transmission member 21 and a second transmission member 22. The axial direction of the first transmission member 21 is parallel to the up-down direction, the second transmission member 22 is connected to the driving assembly 1, and the second transmission member 22 is configured to rotate around the axial direction of the first transmission member 21 and move along the axial direction of the first transmission member 21 under the driving of the driving assembly 1, so that the second transmission member 22 pushes the lower spring seat 2000 to move in the up-down direction.

That is, the second transmission member 22 can rotate around the rotation shaft extending in the up-down direction and move in the up-down direction under the driving of the driving assembly 1, so as to push the lower spring seat 2000 to move in the up-down direction.

In the example shown in fig. 1, 3, 5 and 18, the transmission assembly 2 comprises a spindle-nut pair, the spindle 23 of which constitutes the first transmission member 21 and the nut 24 of which constitutes the second transmission member 22. In some alternative embodiments, the screw-nut pair is a ball screw-nut pair, so that the friction between the screw 23 and the nut 24 is small, the relative movement is smoother, and the vehicle body is raised or lowered without clamping stagnation and with less labor. In other alternative embodiments, the screw 23 of the screw-nut pair is a trapezoidal thread stud, the nut 24 of the screw-nut pair is a thread nut, and the screw 23 is in threaded connection with the nut 24. Thus, the manufacturing cost is low.

Alternatively, the nut 24 and the lead screw 23 are sealed by a sealing member 72, and the sealing member 72 is a single-sided sealing ring, specifically, as shown in fig. 3 and 5, the single-sided sealing ring is disposed between the flange portion 241 of the nut 24 and the lead screw 23.

To ensure that the lower spring seat 2000 only moves in the up-and-down direction and does not rotate around the rotation axis, as shown in fig. 1, the adjustment assembly 100 further includes a guide assembly 3. The guide assembly 3 includes a guide sleeve 31 and a guide ring 32, the guide sleeve 31 is fixed on the lower spring seat 2000, the guide ring 32 is fixed on the first transmission member 21 (the screw 23), as shown in fig. 10, the guide sleeve 31 is provided with a guide groove 311, as shown in fig. 11 and 12, the guide ring 32 is provided with a guide protrusion 321, and the guide groove 311 extends in the up-down direction. Therefore, the lower spring seat 2000 moves only in the vertical direction and does not rotate around the rotation shaft under the cooperation of the guide protrusion 321 and the guide groove 311, so that the circumferential position of the spring 3000 is not affected, and the lateral force direction of the spring is not changed.

of course, the form of the guide assembly 3 is not limited to this, and in some other embodiments of the present invention, the guide sleeve 31 may be fixed to the first transmission member 21 (the lead screw 23), the guide ring 32 may be fixed to the under spring seat 2000, the guide protrusion 321 may be provided on the guide sleeve 31, and the groove 111 may be provided on the guide ring 32.

As shown in fig. 1 and 18, the guide ring 32 is fixed to the lead screw 23, and the lead screw 23 includes a lead screw portion 231 and a fixing portion 232. The screw part 231 is matched with the nut 24 to form a screw-nut pair, the fixing part 232 is fixedly connected with the screw part 231, the fixing part 232 is a column body, the screw part 231 is sleeved outside the column body, the guide ring 32 is sleeved and fixed on the column body, and optionally, the guide ring 32 and the column body can be welded and fixed.

Further, the screw 23 further includes a stop flange 233, the stop flange 233 is disposed at one end of the screw portion 231, for example, the lower end in fig. 1 and 3, the stop flange 233 extends outward in the radial direction of the column and beyond the outer peripheral edge of the screw portion 231, so that the stop flange 233 can stop the nut 24 from being removed from the screw 23.

In some alternative embodiments as shown in fig. 1 and 3, the stop flange 233 is embedded at one end of the lead screw portion 231, and the stop flange 233 is sleeved and welded on the column body. Specifically, the material of the stop flange 233 and the screw portion 231 may be different, and the arrangement of the insert of the stop flange 233 may facilitate the fixation of the screw portion 231 with the cylinder.

For example, in this structure, the lead screw portion 231 may be made of an alloy material to enhance strength and reduce wear and friction, the stop flange 233 may be made of a carbon steel material to facilitate welding of the stop flange 233 to the column, and the lead screw portion 231 of the alloy material and the stop flange 233 of the carbon steel are embedded into a whole, so that such a material is selected to facilitate connection between the lead screw portion 231 and the fixing portion 232, and the manufacturing cost may be reduced while enhancing the strength of the working portion (i.e., the lead screw portion 231) of the lead screw 23.

in other alternative embodiments as shown in fig. 5, the stopping flange 233 is integrally formed with the screw portion 231, and the stopping flange 233 is fixed on the cylinder by the clamp spring 25, specifically, as shown in fig. 5, the stopping flange 233 is provided with a clamp spring slot 2331, the clamp spring 25 is installed in the clamp spring slot 2331, and the clamp spring 25 is sandwiched between the cylinder and the clamp spring slot 2331. That is, the stopping flange 233 and the lead screw portion 231 are made of the same material, for example, the stopping flange 233 and the lead screw portion 231 are made of alloy materials, so that the manufacturing steps of the lead screw 23, that is, the assembling and connecting steps of the stopping flange 233, the lead screw portion 231 and the column are omitted, and the production efficiency is improved.

In one embodiment as shown in fig. 1 and 18, the screw part 231 is a hollow column, the column is a hollow column, and the screw part 231 is fixed on the column in a sleeving manner.

In other embodiments, the screw part 231 is configured as a hollow column, and the column is a solid column, so that the structural strength of the column is high, and the structural stability of the suspension lifting adjusting device 1000 is good.

In the embodiment shown in fig. 1, the column is a hollow column, and a part of the cylinder block 4000 of the shock absorber of the suspension constitutes the hollow column, that is, the suspension raising and lowering adjusting apparatus 1000 according to the embodiment of the present invention may be applied to a suspension form in which the shock absorber is integrated with the spring 3000.

That is, when the suspension elevation adjusting apparatus 1000 is applied to a suspension type in which the shock absorber and the spring 3000 are integrated, the length and the force point of the shock absorber are not changed by only changing the position of the unsprung portion 2000 in the vertical direction, and the positional relationship between the unsprung portion 2000 and the shock absorber is not particularly limited, and the suspension elevation adjusting apparatus 1000 may be applied to a case in which the spring 3000 and the cylinder block 4000 are eccentric or have an inclination angle. Thus, the suspension raising/lowering adjustment device 1000 can be applied to a wider range.

as shown in fig. 15, the lower spring seat 2000 may be disposed such that a central axis L1 of the spring 3000 deviates from or coincides with a central axis L2 of the cylinder block 4000, and a central axis L1 of the spring 3000 has an eccentricity δ i with respect to a central axis L2 of the cylinder block 4000. As shown in fig. 16, the unsprung portion 2000 is offset while increasing the angle of inclination α to neutralize the risk of lateral suspension forces.

According to the lateral force from small to large, five types of lower spring seats 2000 can be correspondingly arranged: when the lateral force is less than 100N, a coaxial spring lower seat 2000 without an inclination angle is adopted; when the lateral force is greater than or equal to 100N and less than 300N, the lower spring seat 2000 with the inclination angle of δ i being 20 mm and no inclination angle, namely the inclination angle α being 0 ° is adopted; when the lateral force is more than or equal to 300N and less than 600N, the lower spring seat 2000 with the angle delta I equal to 20 mm and the inclination angle alpha equal to 5 degrees is adopted; when the lateral force is more than or equal to 600N and less than 900N, the lower spring seat 2000 with the angle delta I equal to 40 mm and the inclination angle alpha equal to 5 degrees is adopted; when the lateral force is greater than or equal to 900N and less than 1300N, the lower spring seat 2000 having δ i of 40 mm and the inclination angle α of 8 ° is used.

of course, as shown in fig. 18, the column may be separately provided, and the column is not related to the cylinder block 4000 of the shock absorber, so that the suspension raising and lowering adjusting apparatus 1000 according to the embodiment of the present invention may be applied to a suspension form in which the shock absorber is separated from the spring 3000.

The suspension lift adjustment apparatus 1000 can be installed in various ways in a vehicle according to different installation requirements of a vehicle body and a vehicle frame and considering installation convenience and adjustment convenience, for example, in the embodiment shown in fig. 18, the upper end of a spring 3000 can be fixed in an adjustable lower spring seat 2000. The suspension raising and lowering adjusting device 1000 (specifically, the lead screw 23 in the suspension raising and lowering adjusting device 1000) may be connected to the fixed plate 5000 on the vehicle body by the connecting bolt 63, welding, or other means. Of course, in some other embodiments, the lower end of the spring 3000 is fixed in the unsprung portion 2000, i.e., the suspension raising and lowering adjusting device 1000 in fig. 18 is rotated by 180 °, and the suspension raising and lowering adjusting device 1000 (specifically, the lead screw 23 in the suspension raising and lowering adjusting device 1000) is connected to the fixing plate 5000 on the frame or the swing arm by the connecting bolt 63, welding or other means.

Therefore, the suspension lifting adjusting device 1000 according to the embodiment of the invention has a wide application range.

The constitution of the drive assembly 1 is described below with reference to fig. 1,2 and 18. In one embodiment as shown in fig. 1, the drive assembly 1 comprises a worm wheel 11, a worm 12 and a manual rocker 13.

The worm wheel 11 is coaxially fixed to the nut 24 so that the nut 24 moves together with the worm wheel 11, that is, the worm wheel 11 is coaxially disposed with the nut 24 and is rotatable together about the lead screw 23 and movable in the axial direction of the lead screw 23.

In some examples shown in fig. 3-6, the worm wheel 11 has a hollow portion, and the worm wheel 11 is fixed outside the nut 24.

The nut 24 and the worm wheel 11 can be fixed in various ways, in some alternative embodiments as shown in fig. 3 and 4, a flange portion 241 is provided on the nut 24, the flange portion 241 and the worm wheel 11 are fixed by a plurality of threaded fasteners, specifically, a plurality of threaded fasteners are provided, a plurality of fastening holes 2411 matched with the plurality of threaded fasteners in a one-to-one correspondence are provided on the flange portion 241, and the plurality of fastening holes 2411 are uniformly spaced along the circumference of the nut 24, so that the nut 24 and the worm wheel 11 are connected more firmly.

In yet other alternative embodiments, as shown in fig. 5 and 6, the nut 24 and the worm gear 11 are secured by a securing structure that includes a protrusion 242 and a groove 111, the protrusion 242 mating with the groove 111 to couple the nut 24 to the worm gear 11.

In alternative embodiments of the invention, the projection 242 is provided on the nut 24 and the groove 111 is provided on the worm wheel 11. As shown in fig. 6, a projection 242 is provided on the outer peripheral wall of the nut 24 that engages with the worm wheel 11, and the projection 242 projects radially outward from the outer surface of the outer peripheral wall of the nut 24. As shown in fig. 2, the worm wheel 11 has a hollow portion, and a groove 111 is provided on an inner surface of a peripheral wall of the hollow portion.

Optionally, there are a plurality of protrusions 242, a plurality of grooves 111, and a plurality of protrusions 242 and a plurality of grooves 111 are correspondingly matched one by one, in some specific embodiments of the present invention, there are three protrusions 242 and three grooves 111, and all three protrusions 242 and three grooves 111 are uniformly spaced along the circumferential direction of the nut 24.

In alternative embodiments of the invention, the projection 242 is provided on the worm wheel 11 and the groove 111 is provided on the nut 24.

The worm 12 meshes with the worm wheel 11, and the manual rocker 13 is connected to the worm 12 so as to be suitable for driving the worm 12 to rotate around the axis of the worm 12. As shown in fig. 17, the manual rocker 13 includes a rotating shaft portion 131 coaxial with the axis of the worm 12 and a rocker arm portion 132 connected to the rotating shaft portion 131.

the process of driving the transmission assembly 2 by the driving assembly 1 is as follows: the user holds the swing arm 132 and pushes the swing arm 132 to make the manual swing arm 13 drive the worm 12 to rotate around the axis of the worm 12 through the rotating shaft 131, the rotation of the worm 12 can drive the worm wheel 11 to rotate around the axial direction of the lead screw 23 due to the matching of the worm 12 and the worm wheel 11, and the nut 24 rotates around the lead screw 23 along with the worm wheel 11 and moves along the axial direction of the lead screw 23 due to the fixation of the worm wheel 11 and the nut 24, so that the driving assembly 1 pushes the spring lower seat 2000 to move in the up-and-down direction through the transmission assembly 2. In short, the driving assembly 1 described above adopts a manual driving form to drive the suspension fork lift-adjusting device 1000.

Of course, the embodiment of the driving assembly 1 is not limited thereto, and in some alternative implementations, the driving assembly 1 may also be in the form of an electric driving, which is labor-saving and efficient.

In an alternative embodiment, the driving assembly 1 comprises a worm wheel 11, a worm 12, a driving motor. The worm wheel 11 is coaxially fixed to the nut 24, the worm 12 is engaged with the worm wheel 11, and the driving motor is connected to the worm 12 to be adapted to drive the worm 12 to rotate about the axis of the worm 12. In this embodiment, the worm wheel 11 and the nut 24 can be fixed in a manner similar to that of the worm wheel 11 and the nut 24 in the manual driving assembly 1.

In another alternative embodiment, the drive assembly 1 includes a drive pulley, a driven pulley, and a drive motor. The driven belt wheel and the driving belt wheel are driven through a transmission belt, the driven belt wheel is coaxially fixed on the nut 24, and the driving motor is connected with the driving belt wheel to be suitable for driving the driven belt wheel to rotate around the screw rod 23 through the transmission belt. The fixing manner of the driven pulley and the nut 24 is similar to the fixing manner of the worm wheel 11 and the nut 24, and will not be described in detail.

The locking assembly 4 according to an embodiment of the present invention is described in detail below with reference to fig. 1,2, and 18. The locking assembly 4 includes a locking ring 41 and a locking bolt 42. As shown in fig. 1 and 2, one end of the worm 12 is provided with a locking groove 121, and the locking groove 121 extends in the radial direction of the worm 12. The locking ring 41 is fixed on the lower spring seat 2000, the locking ring 41 is sleeved on the worm 12, the locking bolt 42 is suitable for sequentially penetrating through one part of the peripheral wall of the locking ring 41, and the locking groove 121 is fixed on the other part of the locking ring 41, so that the lower spring seat 2000 and the worm 12 are locked by the locking assembly 4, the worm 12 cannot rotate, namely the worm wheel 11 and the nut 24 cannot move, and the lower spring seat 2000 is fixed, namely the lower spring seat 2000 is locked at a certain position in the movable range, and the position can be determined according to the running road condition of the vehicle.

specifically, in the beginning of the general design, the design position of the lower spring seat 2000 is controlled to be within the moving range, that is, the middle position of the adjusting stroke of the suspension lifting adjusting device 1000, so that the distances for lifting and lowering the vehicle body are equal, and the trafficability and high-speed fuel economy and the operation and comfort can be better balanced. However, there are cases where the design is not equal, for example: sports cars, off-road vehicles, and the like; since the gap between the sports car and the ground is small, the sports car is mainly considered to improve the passing performance of the rough road and avoid injuries caused by passing through a slope, the design position of the under-spring seat 2000 of the sports car should be controlled to be a lower position or a lower limit position (in the embodiment shown in fig. 1, the position of the under-spring seat 2000 is the lower limit position) so as to increase the lifting distance of the car body. The off-road vehicle is just opposite to a sports car, and has good passing performance, but the fuel economy and the controllability on a high-speed straight road surface are slightly poor, so the design position of the under-spring seat 2000 of the off-road vehicle is controlled to be a higher position or an upper limit position.

In short, the adjusting assembly 100 can achieve stepless adjustment, for example, the suspension lifting adjusting device 1000 using the worm gear and worm screw matching with the lead screw nut pair can achieve stepless adjustment of the height of the vehicle body, wherein the adjusting stroke can be determined by the length of the lead screw 23 and the guide sleeve 31. In other embodiments, the adjustment assembly 100 can also be adjusted in multiple steps, and the size and the number of steps of the adjustment stroke can be adjusted according to the spatial position and the customer requirement.

referring now to fig. 1 and 18, the components between the nut 24 and the unsprung portion 2000 will be described, i.e., as shown in fig. 1 and 18, the thrust bearing 51, the guide seat 53 and the connecting sleeve 54 are disposed between the nut 24 and the unsprung portion 2000.

As shown in fig. 1, the thrust bearing 51 is interposed between the nut 24 and the lower spring seat 2000, and the thrust bearing 51 is interposed between the worm wheel 11 and the lower spring seat 2000 to transmit a force between the nut 24 and the lower spring seat 2000 so that the lower spring seat 2000 moves in an up-and-down direction.

Further, as shown in fig. 1, the lower spring seat 2000 is fixed to the guide sleeve 31 through the connection sleeve 54, in this structure, the connection sleeve 54 is used for fixing the lower spring seat 2000, the lower spring seat 2000 is sleeved and fixed outside the connection sleeve 54, the connection sleeve 54 is sleeved and fixed outside the guide sleeve 31, wherein the connection sleeve 54 and the lower spring seat 2000 are press-fitted or welded and fixed in a small interference fit manner, and the connection sleeve 54 and the guide sleeve 31 are press-fitted or welded and fixed in a small interference fit manner.

Further, as shown in fig. 1, a guide seat 53 is clamped between the thrust bearing 51 and the connecting sleeve 54, the guide seat 53 is sleeved outside the lead screw 23, and by arranging the guide seat 53, the stress of the thrust bearing 51 is more uniform, so that the thrust of the nut 24 and the worm wheel 11 is conveniently transmitted to the lower spring seat 2000, and the stress of the lower spring seat 2000 is also conveniently transmitted to the nut 24.

In summary, the connecting sleeve 54, the guide seat 53 and the thrust bearing 51 are sequentially clamped between the lower spring seat 2000 and the nut 24 from top to bottom, so that the thrust forces of the nut 24, the worm wheel 11 and the lower spring seat 2000 can be more uniformly transmitted, the stress on the thrust bearing 51 is more uniform, the abrasion of the thrust bearing 51 can be reduced, and the service life of the suspension frame lifting adjusting device 1000 can be prolonged.

Specifically, the thrust bearing 51 is a flat thrust bearing 51, and as shown in fig. 8 and 9, the guide seat 53 is configured as an annular member having a substantially "L" shaped cross section, whereby the guide seat 53 has a simple structure, and has a large contact area with the connecting sleeve 54 and the thrust bearing 51, and is more firmly mounted.

further, the suspension fork lift adjusting apparatus 1000 may further include a connecting member 52, a first dust cover 61, and a second dust cover 62.

As shown in fig. 1,2 and 18, the connecting member 52 is connected to the unsprung portion 2000 and the nut 24, respectively, that is, the connecting member 52 is connected between the unsprung portion 2000 and the nut 24, for example, the connecting member 52 is configured as a cylindrical structural member connected between the unsprung portion 2000 and the nut 24, the lock ring 41 is fixed to the connecting member 52, both ends of the worm 12 are supported on the connecting member 52 through bearings 71, respectively, the connecting member 52, the unsprung portion 2000 and the nut 24 define a space in which the thrust bearing 51, the guide seat 53, the worm wheel 11 and the worm 12 are located, thereby preventing the thrust bearing 51, the guide seat 53, the worm wheel 11 and the worm 12 from being immersed by sand, ensuring smooth operation of the respective members, and also ensuring a longer life of the suspension raising and lowering adjusting device 1000.

As shown in fig. 1, the first dust cover 61 is connected to one end of the connecting sleeve 54 far away from the unsprung portion 2000, so as to shield the opening of the connecting sleeve 54, and the guide sleeve 31, the guide ring 32 and the lead screw 23 are all located inside the connecting sleeve 54, so that the first dust cover 61 can prevent the guide sleeve 31, the guide ring 32 and the lead screw 23 from being immersed by silt, thereby ensuring smooth operation of each component, and simultaneously ensuring that the suspension frame lifting adjusting device 1000 has a longer service life.

as shown in fig. 1, the second dust cover 62 is connected to the connecting member 52 and the nut 24, respectively, and the second dust cover 62 is connected to one end of the nut 24 far from the lower spring seat 2000, so as to cover the lower portions of the nut 24 and the lead screw 23 in the second dust cover 62, so that the nut 24 and the lead screw 23 can be prevented from being immersed by silt, smooth operation of each component is ensured, and meanwhile, the suspension lifting adjusting device 1000 can be ensured to have a longer service life.

Alternatively, the connector 52, the first dust boot 61, and the second dust boot 62 may each be a TPV (Thermoplastic elastomer) material or a rubber material.

The operation of the suspension raising and lowering adjusting device 1000 according to the embodiment of the present invention will be described in detail below, taking the suspension raising and lowering adjusting device 1000 in the form of a manual drive as an example, with reference to fig. 1 and 2 to 17:

When the height of the vehicle body needs to be adjusted, the flat side of the manual rocker 13 arranged at one end of the rotating shaft portion 131 is inserted into a groove formed in the worm 12, the rocker portion 132 is pushed, the worm 12 is driven to rotate forward and backward through the rotation of the rotating shaft portion 131, the worm wheel 11 is rotated, the nut 24 is driven by the worm wheel 11 to rotate around the screw rod 23 and move up and down along the screw rod 23, the nut 24 drives the lower spring seat 2000 to move up and down through the thrust bearing 51, the guide seat 53 and the connecting sleeve 54, the screw rod 23 can be fixed on the fixing plate 5000, and the lower spring seat 2000 only moves up and down and cannot rotate around the screw rod 23 under the action of the guide sleeve 31 and the guide ring 32.

When the unsprung seat 2000 is moved to the predetermined position, the locking bolts 42 are inserted into the locking ring 41 and the locking grooves 121 and the locking bolts 42 are fixed to the locking ring 41, thereby locking the unsprung seat 2000 at the predetermined position.

When the height of the vehicle body needs to be adjusted again, the locking bolt 42 is firstly pulled out, and the worm 12 is unlocked, and the adjusting process is repeated.

In summary, the suspension lifting adjustment device 1000 according to the embodiment of the present invention is an adjustment device that only adjusts the vertical position of the lower spring seat 2000 without changing the circumferential position of the spring 3000, i.e. without changing the lateral force direction of the spring, so as to raise and lower the height of the vehicle body, thereby adapting to different loads and road conditions. The suspension lifting adjusting device 1000 is simple and reliable in structure, and can be set to be full-stroke stepless adjustment or multi-gear adjustment according to customer requirements.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

in the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A suspension lifting adjustment device, comprising:

the adjusting assembly is connected with a lower spring seat of the suspension to drive the lower spring seat to move along the vertical direction; wherein

the adjusting assembly comprises a locking assembly, and the locking assembly is used for locking the lower spring seat at any position in the movement range of the lower spring seat;

The adjustment assembly includes:

A drive assembly;

The transmission assembly is connected with the driving assembly, and the driving assembly drives the lower spring seat to move along the up-and-down direction through the transmission assembly; the transmission assembly includes:

The axial direction of the first transmission piece is parallel to the up-down direction;

The second transmission piece is connected with the driving assembly and is arranged to rotate around the axial direction under the driving of the driving assembly and move along the axial direction so as to push the lower spring seat to move along the up-and-down direction;

The driving assembly comprises a worm wheel, a worm and a manual rocker, the worm wheel is coaxially fixed on the second transmission piece, the worm is meshed with the worm wheel, the manual rocker is connected with the worm to be suitable for driving the worm to rotate, one end of the worm is provided with a locking groove, and the locking groove extends along the radial direction of the worm; the locking assembly includes: the locking bolt is suitable for sequentially penetrating through one part of the peripheral wall of the locking ring and the locking groove to be fixed on the other part of the locking ring.

2. The suspension ride height adjustment device of claim 1, wherein the adjustment assembly further comprises a guide assembly including a guide sleeve and a guide ring, one of the guide sleeve and the guide ring being fixed to the first transmission member and the other of the guide sleeve and the guide ring being fixed to the unsprung portion;

One of the guide groove and the guide protrusion is arranged on one of the guide sleeve and the guide ring, the other of the guide groove and the guide protrusion is arranged on the other of the guide sleeve and the guide ring, and the guide groove extends along the vertical direction.

3. suspension lifting adjustment device according to claim 2, characterized in that the transmission assembly comprises a screw-nut pair, the screw of which constitutes the first transmission member, the nut of which constitutes the second transmission member, the guide ring being fixed on the screw.

4. The suspension lift adjustment device of claim 3, wherein the lead screw comprises:

A lead screw portion engaged with the nut;

the fixed part is fixedly connected with the screw rod part, the fixed part is constructed into a column body, and the guide ring is sleeved and fixed on the column body.

5. The suspension lift adjustment device of claim 4, wherein said lead screw further comprises:

The stop flange is arranged at one end of the screw rod part and extends outwards along the radial direction of the column body and exceeds the outer peripheral edge of the screw rod part.

6. the suspension lift adjustment device of claim 5, wherein said stop flange is sleeved and welded on said post; or

The stop flange and the screw rod part are integrally formed and are fixed on the column body through a clamp spring.

7. The suspension ride-up-and-down adjustment device of claim 4, wherein the post is a hollow post or a solid post.

8. the suspension lift adjustment device of claim 4, wherein the post is a hollow post, a portion of a cylinder block of a shock absorber of the suspension constituting the hollow post.

9. the suspension ride-up-and-down adjustment device of claim 3, wherein the drive assembly comprises:

A worm gear coaxially fixed to the nut;

A worm engaged with the worm gear;

The manual rocker is connected with the worm so as to be suitable for driving the worm to rotate.

10. The suspension ride-up and down adjustment device of claim 9, wherein the adjustment assembly further comprises a locking assembly for locking the unsprung mass in any position within the unsprung mass range of motion.

11. The suspension fork lift adjustment device of claim 10, wherein one end of the worm is provided with a locking groove extending in a radial direction of the worm;

The locking assembly includes:

The locking ring is fixed on the lower spring seat and sleeved outside the worm;

A locking bolt adapted to pass through a portion of the peripheral wall of the locking ring in order, the locking groove being fixed to another portion of the locking ring.

12. the suspension ride-up-and-down adjustment device of claim 9, further comprising: and the thrust bearing is clamped between the nut and the lower spring seat and between the worm wheel and the lower spring seat.

13. The suspension fork lift adjustment assembly of claim 12, wherein said unsprung mass is secured to said guide sleeve by a coupling sleeve, said coupling sleeve being fixedly received by said guide sleeve; the thrust bearing with it is equipped with the guide holder to press from both sides between the connecting sleeve, just the guide holder cover is established outside the lead screw.

14. The suspension ride-up-and-down adjustment device of claim 13, further comprising: the connecting piece, the connecting piece respectively with spring lower carriage with the nut links to each other, the lock ring is fixed on the connecting piece, the both ends of worm are in through the bearing support respectively on the connecting piece, footstep bearing thrust bearing the guide holder worm wheel with the worm is located the connecting piece spring lower carriage with in the space that the nut was injectd.

15. The suspension lift adjustment device of claim 9, wherein a flange portion is provided on the nut, and the flange portion is fixed to the worm wheel by a threaded fastener;

or the nut and the worm wheel are fixed through a fixing structure, the fixing structure comprises a protrusion and a groove, the protrusion is matched with the groove, the protrusion is arranged on one of the nut and the worm wheel, and the groove is arranged on the other of the nut and the worm wheel.

16. The suspension ride-up-and-down adjustment device of claim 3, wherein the drive assembly comprises:

A worm gear coaxially fixed to the nut;

a worm engaged with the worm gear;

And the driving motor is connected with the worm so as to be suitable for driving the worm to rotate.

17. The suspension ride-up-and-down adjustment device of claim 3, wherein the drive assembly comprises:

a driving pulley;

The driven belt wheel and the driving belt wheel are in transmission through a transmission belt, and the driven belt wheel is coaxially fixed on the nut;

And the driving motor is connected with the driving belt wheel to be suitable for driving the driven belt wheel to rotate through the transmission belt.