CN117307643A - Torsion bar spring, control method thereof and vehicle - Google Patents

Torsion bar spring, control method thereof and vehicle Download PDF

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Publication number
CN117307643A
CN117307643A CN202210709539.9A CN202210709539A CN117307643A CN 117307643 A CN117307643 A CN 117307643A CN 202210709539 A CN202210709539 A CN 202210709539A CN 117307643 A CN117307643 A CN 117307643A
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CN
China
Prior art keywords
torsion bar
magnetic attraction
bar spring
end portion
stiffness
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210709539.9A
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Chinese (zh)
Inventor
徐杨
刘丽娟
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Beiqi Foton Motor Co Ltd
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Beiqi Foton Motor Co Ltd
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Publication date
Application filed by Beiqi Foton Motor Co Ltd filed Critical Beiqi Foton Motor Co Ltd
Priority to CN202210709539.9A priority Critical patent/CN117307643A/en
Publication of CN117307643A publication Critical patent/CN117307643A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
    • F16F1/14—Torsion springs consisting of bars or tubes
    • F16F1/145—Torsion springs consisting of bars or tubes with means for modifying the spring characteristics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
    • B60G17/02—Spring characteristics, e.g. mechanical springs and mechanical adjusting means
    • B60G17/025—Spring characteristics, e.g. mechanical springs and mechanical adjusting means the mechanical spring being a torsion spring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F2228/00—Functional characteristics, e.g. variability, frequency-dependence
    • F16F2228/06—Stiffness
    • F16F2228/066—Variable stiffness
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F2230/00—Purpose; Design features
    • F16F2230/0005—Attachment, e.g. to facilitate mounting onto confer adjustability
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F2230/00—Purpose; Design features
    • F16F2230/18—Control arrangements

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Springs (AREA)

Abstract

The present disclosure relates to a torsion bar spring, a control method thereof and a vehicle, wherein the torsion bar spring comprises a first rod section (1), a second rod section (2), a connecting structure (3) and a rigidity adjusting mechanism, a first end (11) in the axial direction of the first rod section is abutted against a second end (21) in the axial direction of the second rod section in a fitting way, the connecting structure is connected between the first end and the second end and can be switched between a first connecting position and a second connecting position, and the connecting structure (3) limits the first rod section (1) to rotate relative to the second rod section (2) in the first connecting position; in the second connection position, the connection structure (3) allows the first pole segment (1) to rotate relative to the second pole segment (2), and the stiffness adjustment mechanism is capable of adjusting the compression force between the first end (11) and the second end (21). The torsion bar spring can give consideration to the constant self-stiffness and the adjustable stiffness, and solves the technical problem that the self-stiffness is not adjustable.

Description

Torsion bar spring, control method thereof and vehicle
Technical Field
The disclosure relates to the technical field of vehicle equipment, in particular to a torsion bar spring, a control method thereof and a vehicle.
Background
Torsion bar springs are a type of suspension elastic element, which is itself a torsion bar made of spring steel, and mainly function to absorb vibration energy by torsional elasticity. One end of the torsion bar spring is connected to the vehicle body, and the other end is generally connected to the swing arm.
In the related art, the rigidity of a torsion bar spring used by a suspension determines the rigidity of the torsion bar spring, the rigidity of the suspension determines the frequency deviation of a vehicle body, the frequency deviation of the vehicle body refers to the frequency of up-and-down vibration of the vehicle body when the vehicle passes over an uneven road surface, the speed of the vibration frequency directly determines the riding comfort of passengers, the vibration frequency is generally expected to be close to the frequency of the people when walking, the discomfort of a human body is caused by the excessive vibration frequency, and the motion sickness of the human body is caused by the insufficient vibration frequency. At present, the rigidity of the torsion bar spring cannot be changed, so that the offset frequency of the vehicle cannot be adapted to the frequency of a person walking, and discomfort of passengers in the vehicle can be caused.
Disclosure of Invention
The purpose of the present disclosure is to provide a torsion bar spring, which can give consideration to the constant self-stiffness and the adjustable stiffness, and solve the technical problem that the self-stiffness is not adjustable.
In order to achieve the above object, the present disclosure provides a torsion bar spring including a first bar segment, a second bar segment, a connecting structure, and a stiffness adjustment mechanism, a first end portion in an axial direction of the first bar segment being abutted snugly against a second end portion in an axial direction of the second bar segment, the connecting structure being connected between the first end portion and the second end portion and being switchable between a first connecting position in which the connecting structure restricts rotation of the first bar segment relative to the second bar segment, and a second connecting position; in the second connection position, the connection structure allows the first pole segment to rotate relative to the second pole segment, and the stiffness adjustment mechanism is capable of adjusting a compressive force between the first end and the second end.
Optionally, the rigidity adjusting mechanism includes a first magnetic attraction member provided at the first end portion or the second end portion, magnetic poles of the first magnetic attraction member are arranged along an axial direction, and in the second connection position, the first magnetic attraction member is provided to have an adjustable magnetic attraction force.
Optionally, the first magnetic attraction member is configured as an electromagnet, and in the second connection position, the first magnetic attraction member is in an energized state, and the rigidity adjusting mechanism changes the magnetic attraction force of the first magnetic attraction member by changing the magnitude of the current flowing through the first magnetic attraction member.
Optionally, the rigidity adjustment mechanism includes that the piece is inhaled to the first magnetism that sets up and be in same radial position on the torsion bar spring and second magnetism is inhaled the piece, first magnetism inhale the piece set up in first tip, the second magnetism inhale the piece set up in the second tip, the magnetic pole that the piece was inhaled to the second magnetism is arranged along the axial the second hookup location, first magnetism inhale piece with the piece is inhaled to the second magnetism looks attraction each other.
Optionally, the second magnetic attraction member is configured as an electromagnet, and in the second connection position, the second magnetic attraction member is in an energized state, and the rigidity adjusting mechanism is capable of changing the magnetic attraction force of the second magnetic attraction member by changing the magnitude of the current flowing through the second magnetic attraction member.
Optionally, the first end is provided with a containing groove, the second end is provided with a mounting part extending into the containing groove, the connecting structure comprises a connecting component, the connecting component comprises a clamping block which can be radially movably connected with the mounting part, the first end is provided with a clamping groove on the wall of the containing groove,
in the first connection position, the clamping block is clamped in the clamping groove; and in the second connection position, the clamping block exits the clamping groove.
Optionally, the connecting assembly includes an actuating member and an elastic restoring member, the elastic restoring member is connected between the clamping block and the mounting portion, the actuating member is disposed on the mounting portion and configured as an electromagnet, in the second connecting position, the actuating member is in an energized state and attracts the clamping block to exit the clamping groove, and the elastic restoring member is pressed and stores elastic potential energy; in the first connection position, the actuating piece is in a power-off state, and the elastic reset piece pushes the clamping block to be clamped in the clamping groove.
Optionally, a sliding groove extending along a radial direction is formed in the mounting portion, and the clamping block is slidably arranged in the sliding groove, wherein the clamping block is configured as a wedge block, and the diameter of the wedge block gradually decreases along a radial direction gradually away from the sliding groove.
According to a second aspect of the present disclosure, there is provided a control method of a torsion bar spring as described above, the control method comprising: determining the target rigidity of the torsion bar spring according to the sprung mass of the vehicle and a preset target offset frequency;
determining a target current according to the target stiffness and a preset corresponding relation, wherein the corresponding relation is used for indicating the relation between the stiffness of the torsion bar spring and the target current;
the target current is introduced into the torsion bar spring, and the pressing force between the first end portion and the second end portion is adjusted by adjusting the characteristic of the rigidity adjusting mechanism, so as to adjust the rigidity of the torsion bar spring.
Optionally, the introducing the target current into the torsion bar spring adjusts a pressing force between the first end portion and the second end portion by adjusting a characteristic of the stiffness adjusting mechanism, including:
and leading the target current into a first magnetic attraction piece so as to adjust the pressing force between the first end part and the second end part by adjusting the magnetic attraction force of the first magnetic attraction piece.
According to a third aspect of the present disclosure there is provided a vehicle comprising a torsion bar spring as described above.
Through the technical scheme, in the torsion bar spring provided by the disclosure, at the first connecting position, the connecting structure limits the first bar section to rotate relative to the second bar section, namely the torsion bar spring can twist as a whole, and at the moment, the torsion bar spring has constant rigidity; in the second connection position, because the first pole section can rotate relative to the second pole section, therefore, the pressing force between the first end part and the second end part is adjusted through the rigidity adjusting mechanism, the rotating resistance of the first pole section relative to the second pole section can be adjusted, and the rigidity of the torsion bar spring can be adjusted.
Additional features and advantages of the present disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification, illustrate the disclosure and together with the description serve to explain, but do not limit the disclosure. In the drawings:
FIG. 1 is a schematic structural view of a torsion bar spring provided in accordance with an embodiment of the present disclosure;
FIG. 2 is a schematic structural view of a first rod segment of a torsion bar spring provided in accordance with an embodiment of the present disclosure;
FIG. 3 is a side view of a first rod segment of a torsion bar spring provided in accordance with an embodiment of the present disclosure;
FIG. 4 is a schematic structural view of a second rod segment in a torsion bar spring provided in accordance with an embodiment of the present disclosure;
FIG. 5 is a side view of a second rod segment of the torsion bar spring provided in accordance with an embodiment of the present disclosure;
FIG. 6 is a partial schematic view of a torsion bar spring provided in accordance with an embodiment of the present disclosure, with the attachment structure in a first attachment position;
FIG. 7 is a partial schematic view of a torsion bar spring provided in accordance with an embodiment of the present disclosure, with the connection structure in a second connection position;
fig. 8 is a flowchart of a control method of a torsion bar spring provided according to an embodiment of the present disclosure.
Description of the reference numerals
1-first pole section, 11-first end, 111-accommodation groove, 112-clamping groove, 2-second pole section, 21-second end, 211-mounting part, 2111-chute, 3-connecting structure, 311-fixture block, 312-actuating piece, 313-elastic reset piece, 41-first magnetic attraction piece, 42-second magnetic attraction piece.
Detailed Description
Specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the disclosure, are not intended to limit the disclosure.
In this disclosure, unless otherwise indicated, terms of orientation such as "inner and outer" are used to refer to the inner and outer of the contour of the respective component parts themselves. The terms "first" and "second" are used herein to distinguish one element from another without sequence or importance. Moreover, the following description, when referring to the drawings, wherein like reference numerals designate identical or similar elements throughout the several views, the present disclosure is not repeated.
According to a specific embodiment of the present disclosure, there is provided a torsion bar spring, as shown in fig. 1, 6 and 7, including a first rod segment 1, a second rod segment 2, a connection structure 3, and a stiffness adjustment mechanism, a first end 11 of the first rod segment 1 in an axial direction being abutted snugly against a second end 21 of the second rod segment 2 in an axial direction, the connection structure 3 being connected between the first end 11 and the second end 21 and being switchable between a first connection position in which the connection structure 3 restricts rotation of the first rod segment 1 relative to the second rod segment 2; in the second connection position, the connection 3 allows the first pole segment 1 to rotate relative to the second pole segment 2, and the stiffness adjustment mechanism is capable of adjusting the compression force between the first end 11 and the second end 21.
Through the technical scheme, in the torsion bar spring provided by the disclosure, in the first connecting position, the connecting structure limits the first bar section 1 to rotate relative to the second bar section 2, namely the torsion bar spring can twist as a whole, and the torsion bar spring has constant rigidity at the moment; in the second connection position, since the first rod section 1 can rotate relative to the second rod section 2, the pressing force between the first end 11 and the second end 21 is adjusted through the stiffness adjusting mechanism, the resistance of the first rod section 1 relative to the rotation of the second rod section 2 can be adjusted, and the stiffness of the torsion bar spring can be adjusted.
It should be noted that the rotation of the first pole segment 1 relative to the second pole segment 2 refers to the relative rotation of the two, i.e. the first pole segment 1 can rotate to rotate relative to the second pole segment 2, or the second pole segment 2 can rotate to rotate relative to the first pole segment 1, i.e. it is not limited here whether the first pole segment 1 rotates or the second pole segment 2 rotates. In addition, and as rotating herein, it means that the first rod segment 1 or the second rod segment 2 rotates around the central axis of the torsion bar spring. In addition, the specific manner of adjusting the pressing force between the first end 11 and the second end 21 is not limited by the present disclosure, which will be described in detail in the following embodiments.
It should be further noted that, in the first connection position, the first end portion 11 and the second end portion 21 may be attached at the plane a, which is not limited by the present disclosure.
In the specific embodiment of the present disclosure, referring to fig. 6 and 7, the rigidity adjusting mechanism includes a first magnetic attraction member 41 provided at the first end portion 11 or the second end portion 21, the magnetic poles of the first magnetic attraction member 41 are arranged in the axial direction, and in the second connection position, the first magnetic attraction member 41 is provided to have an adjustable magnetic attraction force. In this way, in the second connection position, the first magnetic attraction piece 41 can attract the second end portion 21 or the first end portion 11, so that the first end portion 11 and the second end portion 21 are pressed together in a lamination mode, the pressing force of the first end portion 11 and the second end portion 21 can be adjusted by adjusting the magnetic attraction force of the first magnetic attraction piece 41, and further the torsion bar spring stiffness can be adjusted. Here, the specific adjustment manner of the magnetic attraction force of the first magnetic attraction member 41 is not limited by the present disclosure, which will be described in detail in the following embodiments. Of course, according to some embodiments of the present disclosure, the stiffness adjustment mechanism may further include an axially movable telescopic rod that may abut one of the first end 11 and the second end 21 and be movable toward the other of the first end 11 and the second end 21, such that the adjustment of the compressive force may also be achieved by the difference in the pre-tightening force exerted by the telescopic rod.
Here, the magnetic attraction force of the first magnetic attraction member 41 refers to an attraction force that the first magnetic attraction member 41 can generate on the second end portion 21 when the first magnetic attraction member 41 is disposed at the first end portion 11, and conversely, an attraction force that the first magnetic attraction member 41 can generate on the first end portion 11 when the first magnetic attraction member 41 is disposed at the second end portion 21. The present disclosure will not be described in detail in the following embodiments.
In some embodiments of the present disclosure, the first magnetic attraction piece 41 may be configured as an electromagnet, and in the second connection position, the first magnetic attraction piece 41 is in an energized state, and the stiffness adjustment mechanism changes the magnetic attraction force of the first magnetic attraction piece 41 by changing the magnitude of the current flowing through the first magnetic attraction piece 41, so that the magnetic attraction force of the first magnetic attraction piece 41 can be flexibly adjusted by changing the magnitude of the current, and the stiffness adjustment mechanism is simple in structure and easy to implement. Here, in the first connection position, the first magnetic attraction piece 41 may be in the power-off state, so that the interference of the first magnetic attraction piece 41 on the torsion bar spring rate in the first connection position may be reduced, and the loss of electric energy may be reduced, and of course, in the first connection position, the first magnetic attraction piece 41 may also be in the power-on state, which is not limited by the present disclosure. It should be noted that, the principle of adjusting the magnetic attraction force of the electromagnet by changing the current is well known to those skilled in the art, and the disclosure is not repeated herein. Of course, in other embodiments of the present disclosure, the first magnetic attraction piece 41 may be configured as a permanent magnet, and the rigidity adjusting mechanism may include a magnetic blocking plate that may be disposed between the first magnetic attraction piece 41 and the first end 11 or the second end 21 where the first magnetic attraction piece 41 is not disposed, where the magnetic attraction force of the first magnetic attraction piece 41 may also be changed by disposing a different number of magnetic blocking plates, so that flexible adjustment of the magnetic attraction force of the first magnetic attraction piece 41 may also be achieved.
In some embodiments of the present disclosure, referring to fig. 6 and 7, the stiffness adjustment mechanism may include a first magnetic attraction piece 41 and a second magnetic attraction piece 42 disposed in pairs and at the same radial position on the torsion bar spring, the first magnetic attraction piece 41 being disposed at the first end portion 11, the second magnetic attraction piece 42 being disposed at the second end portion 21, magnetic poles of the second magnetic attraction piece 42 being disposed in the axial direction, and the first magnetic attraction piece 41 and the second magnetic attraction piece 42 being attracted to each other in the second connection position. In this way, in the second connection position, by adjusting the magnetic attraction force of the first magnetic attraction piece 41, the attraction force between the first magnetic attraction piece 41 and the second magnetic attraction piece 42 can be adjusted, so that the effect of the magnetic force is more obvious, and the adjustment of the torsion bar spring stiffness can be more stable. Here, when the end of the first magnetic attraction piece 41 close to the second magnetic attraction piece 42 is N-stage, the end of the second magnetic attraction piece 42 close to the first magnetic attraction piece 41 is S-stage, so as to realize the mutual attraction of the first magnetic attraction piece 41 and the second magnetic attraction piece 42. Of course, according to other embodiments of the present disclosure, in the second connection position, the first magnetic attraction member 41 may also repel the second magnetic attraction member 42, so that the first end portion 11 and the second end portion 21 may also adjust the pressing force of the first end portion 11 and the second end portion 21 by the magnitude of the repulsive force, and in this embodiment, in the first connection position, the first end portion 11 and the second end portion 21 are pressed together, that is, have a preset pressing force therebetween.
Alternatively, the second magnetic attraction member 42 may be configured as an electromagnet, and in the second connection position, the second magnetic attraction member 42 is in an energized state, and the rigidity adjusting mechanism is capable of changing the magnetic attraction force of the second magnetic attraction member 42 by changing the magnitude of the current flowing through the second magnetic attraction member 42. Thus, the magnetic attraction force itself can be changed by changing the current of the second magnetic attraction member 42, so that the adjustment of the pressing force can also be achieved. Here, in the second connection position, the magnetic attraction force of at least one of the first magnetic attraction piece 41 and the second magnetic attraction piece 42 may be changed to adjust the above-mentioned pressing force, and the present disclosure may be adaptively designed according to actual needs. Here, in the first connection position, the second magnetic member 42 may be in the power-off state, so that the influence of the stiffness adjustment mechanism on the torsion bar spring stiffness in the first connection position may be further reduced, and the loss of electric energy may be reduced, and of course, in the first connection position, the second magnetic member 42 may also be in the power-on state, which is not limited by the present disclosure.
Alternatively, referring to fig. 6 and 7, the rigidity adjusting mechanism may include at least two pairs of first and second magnetic attraction pieces 41 and 42, wherein the at least two pairs of first and second magnetic attraction pieces 41 and 42 may be arranged at intervals in the circumferential direction of the torsion bar spring, so that the reliability of rigidity adjustment of the torsion bar spring may be improved by the at least two pairs of first and second magnetic attraction pieces 41 and 42 while the accuracy of rigidity adjustment is improved.
In a specific embodiment of the present disclosure, the connection structure may be configured in any suitable manner, and referring to fig. 2 to 7, the first end 11 may be provided with a receiving groove 111, the second end 21 has a mounting portion 211 extending into the receiving groove 111, the connection structure 3 includes a connection assembly including a clamping block 311 radially movably connected to the mounting portion 211, the first end 11 is provided with a clamping groove 112 on a groove wall of the receiving groove 111, and in the first connection position, the clamping block 311 is clamped to the clamping groove 112, so that rotation of the first end 11 relative to the second end 21 may be restricted by clamping the clamping block 311 and the clamping groove 112 to maintain constant spring stiffness of the torsion bar; in the second connection position, the clamping block 311 is withdrawn from the clamping groove 112, so that the connection structure allows the first end 11 to rotate relative to the second end 21, and the structure is simple and the reliability is high.
In some embodiments of the present disclosure, referring to fig. 2 to 7, the connection assembly may include an actuating member 312 and an elastic restoring member 313, the elastic restoring member 313 is connected between the latch 311 and the mounting portion 211, the actuating member 312 is disposed at the mounting portion 211 and configured as an electromagnet, and in the second connection position, the actuating member 312 is in an energized state and attracts the latch 311 out of the latch 112, such that the latch 311 can be moved out of the latch 112 by the attraction of the electromagnet to the latch 311, thereby allowing the first end 11 to rotate relative to the second end 21, and the elastic restoring member 313 is pressed and stores elastic potential energy; in the first connection position, the actuating member 312 is in a power-off state, that is, the actuating member 312 does not attract the clamping block 311, and at this time, the elastic reset member 313 pushes the clamping block 311 to be clamped in the clamping groove 112, that is, the clamping of the clamping block 311 and the clamping groove 112 is ensured. Thus, the present disclosure utilizes the smart combination of the electromagnet and the elastic restoring member 313, on one hand, simplifies the structure of the connecting assembly, on the other hand, realizes the position switching of the clamping block 311, and saves energy. Here, the elastic restoring member 313 may be configured as a compression spring, which is not limited by the present disclosure. Of course, according to other embodiments of the present disclosure, the connection assembly may include a moving rod that is radially retractable, and that is capable of being connected between the mounting portion 211 and the latch 311, where radial movement of the latch 311 may also be achieved by radial movement of the moving rod, which is not limited by the present disclosure.
In some embodiments of the present disclosure, referring to fig. 5 to 7, a sliding groove 2111 extending in a radial direction is formed on the mounting portion 211, and a clamping block 311 is slidably provided in the sliding groove 2111, wherein the clamping block 311 is configured as a wedge block having a diameter gradually decreasing in a radial direction gradually away from the sliding groove 2111. Thus, in the process of gradually inserting the wedge block into the clamping groove 112, the wedge block can be gradually clamped at the edge of the clamping groove 112, and the structure is simple, stable and reliable.
Alternatively, referring to fig. 2 and 3, in order to facilitate the assembly of the first end 11 and the second end 21, the above-mentioned clamping groove 112 may be configured as an axially extending clamping groove, and the clamping groove 112 has an axially outward opening, which can facilitate the clamping block 311 to gradually slide axially along the clamping groove 112 to the inner end of the clamping groove 112 during the assembly, which is not limited in this disclosure.
Alternatively, referring to fig. 2 to 7, the connection structure 3 may include a plurality of connection members arranged at intervals in the circumferential direction of the torsion bar spring, and the first end 11 has the card slot 112 in one-to-one correspondence with each card block 311. In this way, the stability of the connection between the first end portion 11 and the second end portion 21 can be improved.
The present disclosure will now be described in detail with reference to the above embodiments. First, when the torsion bar spring is required to maintain constant rigidity, the first magnetic attraction piece 41 and the second magnetic attraction piece 42 are in a power-off state, and the actuating piece 312 is in a power-off state, at this time, the clamping block 311 is stably clamped in the corresponding clamping groove 112, and the first end 11 does not rotate relative to the second end 21; when the rigidity of the torsion bar spring needs to be adjusted, the actuating member 312 is electrified, at this time, the actuating member 312 attracts the clamping block 311 to exit the corresponding clamping groove 112, at this time, the first end portion 11 can rotate relative to the second end portion 21, then, the first magnetic attraction member 41 and the second magnetic attraction member 42 are electrified, and the pressing force between the first end portion 11 and the second end portion 21 can be adjusted by adjusting the magnitude of the current flowing through the first magnetic attraction member 41 and/or the second magnetic attraction member 42, so that the rigidity of the torsion bar spring can be adjusted.
According to a second aspect of the present disclosure, there is provided a control method of a torsion bar spring as described above, the control method comprising: determining the target rigidity of the torsion bar spring according to the sprung mass of the vehicle and a preset target offset frequency; determining a target current according to the target stiffness and a preset corresponding relation, wherein the corresponding relation is used for indicating the relation between the stiffness of the torsion bar spring and the target current; the target current is introduced into the torsion bar spring, and the pressing force between the first end portion 11 and the second end portion 21 is adjusted by adjusting the characteristic of the stiffness adjustment mechanism to adjust the stiffness of the torsion bar spring.
The offset frequency of the vehicle depends on the suspension stiffness of the vehicle and also depends on the sprung mass of the vehicle, and a specific calculation formula is as follows:
wherein n is offset frequency, C S For suspension stiffness, m is the sprung mass of the vehicle.
In one implementation, the torsion bar spring may be composed of the first pole section 1, the second pole section 2, and the stiffness adjustment mechanism, and after the target current is obtained, the target current may be introduced into the torsion bar spring so that the target current flows through the stiffness adjustment mechanism, thereby adjusting the characteristics of the stiffness adjustment mechanism. When the characteristics of the stiffness adjustment mechanism change, the pressing force between the first end portion 11 and the second end portion 21 also changes, so that the stiffness of the torsion bar spring is adjusted to the target stiffness. In another implementation, the torsion bar spring may be a rod segment composed of a conductive composite, the stiffness of which may be varied by varying the current flowing through the conductive composite. After the target current is obtained, the target current may be introduced into the torsion bar spring, thereby adjusting the stiffness of the torsion bar spring to the target stiffness. In this way, the target stiffness of the torsion bar spring capable of enabling the vehicle to reach the target offset frequency under the current sprung mass is determined first, then the target current capable of enabling the stiffness of the torsion bar spring to reach the target stiffness is determined, and the pressing force between the first end 11 and the second end 21 is adjusted by introducing the target current into the torsion bar spring, so that the stiffness of the torsion bar spring is adjusted to the target stiffness, and the vehicle can keep the optimal offset frequency under different sprung masses. Here, the stiffness of the torsion bar spring determines the suspension stiffness described above, which will not be described in detail in this disclosure.
In this way, the present disclosure first determines a target stiffness of the torsion bar spring according to a load and a target off-frequency of the vehicle, and determines a target current according to the target stiffness and a preset correspondence, wherein the correspondence is used to indicate a relationship between the stiffness of the torsion bar spring and the current. The target current is then introduced into the torsion bar spring, thereby adjusting the stiffness of the torsion bar spring. The rigidity of the torsion bar spring is adjusted by introducing the target current into the torsion bar spring, so that the vehicle can keep optimal offset frequency under different sprung mass, and the running smoothness of the vehicle and the riding comfort of passengers can be improved. In addition, the control method has all the beneficial effects of the torsion bar spring, and the disclosure is not repeated here.
According to some embodiments of the present disclosure, the introducing the target current into the torsion bar spring adjusts a pressing force between the first end 11 and the second end 21 by adjusting a characteristic of the stiffness adjustment mechanism, including: the target current is introduced into the first magnetic attraction member 41 to adjust the pressing force between the first end portion 11 and the second end portion 21 by adjusting the magnetic attraction force of the first magnetic attraction member 41. In this way, after the target current is obtained, the target current may be introduced into the first magnetic attraction piece of the torsion bar spring to adjust the magnetic attraction force of the first magnetic attraction piece 41 to adjust the pressing force between the first end portion 11 and the second end portion 21. Of course, in the manner that the torsion bar spring includes the first magnetic attraction piece 41 and the second magnetic attraction piece 42, the target current may be introduced into the first magnetic attraction piece and/or the second magnetic attraction piece 42, which is not limited by the present disclosure.
In some embodiments of the present disclosure, the control method may include: determining a target suspension vertical stiffness of the vehicle according to the sprung mass and the target offset frequency of the vehicle; and determining the target rigidity according to the vertical rigidity of the target suspension.
In one implementation, the sprung mass of the vehicle may be obtained first, for example, the sprung mass of the vehicle may be detected directly by the pressure sensor, or the displacement of the vehicle body relative to a preset reference line may be obtained by the displacement sensor, and the sprung mass of the vehicle may be determined according to the displacement, which is not particularly limited in this disclosure. And then, acquiring vertical acceleration from an acceleration sensor, and obtaining the suspension sprung vertical force of the vehicle according to the sprung mass of the vehicle and the vertical acceleration of the vehicle through a formula 2.
P t =m (g+a) (formula 2)
Wherein P is t The suspension sprung vertical force is represented by m, the sprung mass of the vehicle, g is the gravitational acceleration, and a is the vertical acceleration of the vehicle.
In another implementation, the current suspension sprung vertical force of the vehicle may be obtained directly through the force sensor. It is to be noted that, as shown in the formula 2, when the vehicle is in a stationary state, the suspension sprung vertical force is equal to the sprung mass of the vehicle, and when the vehicle is in a running state, the suspension sprung vertical force is proportional to the sprung mass of the vehicle.
And then, according to the suspension spring load vertical force and the target offset frequency, the target suspension vertical rigidity currently required by the vehicle can be obtained through calculation of a formula 3.
Wherein C is St Is the vertical rigidity of the suspension.
In one implementation, the target stiffness may be calculated from equation 4 based on the target suspension vertical stiffness.
Wherein C is Tt And alpha is the angle rotated by the tail end of the torsion bar of the swing arm section relative to the datum line under the action of the vertical force of the suspension spring, and can be measured by an angle sensor. Beta is the angle of the torsion bar tail end of the swing arm section relative to the datum line when the load is 0, and R isThe distance between the action point of the suspension spring load vertical force and the torsion bar is a structural parameter of the vehicle.
In another implementation, the target stiffness may be calculated from equation 5 based on the target suspension vertical stiffness.
Wherein f=rsina, f is the displacement of the action point of the suspension spring-loaded vertical force relative to a datum line, f can be obtained by testing a vehicle body height sensor, and the datum line is a horizontal line of the center line of the tail end of the torsion bar of the over-swinging arm section.
In addition, the present disclosure provides a vehicle including the torsion bar spring as described above, and having all the advantageous effects thereof, and the present disclosure is not repeated herein. In the manner in which the vehicle includes the torsion bar spring as described above, the vehicle can also promote riding comfort of itself.
The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure, and all the simple modifications belong to the protection scope of the present disclosure.
In addition, the specific features described in the foregoing embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, the present disclosure does not further describe various possible combinations.
Moreover, any combination between the various embodiments of the present disclosure is possible as long as it does not depart from the spirit of the present disclosure, which should also be construed as the disclosure of the present disclosure.

Claims (10)

1. A torsion bar spring, characterized in that the torsion bar spring comprises a first rod section, a second rod section, a connecting structure and a rigidity adjusting mechanism, wherein a first end part in the axial direction of the first rod section is abutted against a second end part in the axial direction of the second rod section in a fitting way, the connecting structure is connected between the first end part and the second end part and can be switched between a first connecting position and a second connecting position, and in the first connecting position, the connecting structure limits the first rod section to rotate relative to the second rod section; in the second connection position, the connection structure allows the first pole segment to rotate relative to the second pole segment, and the stiffness adjustment mechanism is capable of adjusting a compressive force between the first end and the second end.
2. A torsion bar spring according to claim 1, wherein the stiffness adjustment mechanism includes a first magnetic attraction member provided at the first end portion or the second end portion, the poles of the first magnetic attraction member being arranged in an axial direction, the first magnetic attraction member being provided with an adjustable magnetic attraction force in the second connection position.
3. The torsion bar spring according to claim 2, wherein the first magnetic attraction member is configured as an electromagnet, and in the second connection position, the first magnetic attraction member is in an energized state, and the rigidity adjusting mechanism changes a magnetic attraction force of the first magnetic attraction member by changing a magnitude of a current flowing through the first magnetic attraction member.
4. A torsion bar spring according to claim 3, wherein the stiffness adjustment mechanism comprises a first magnetic attraction member and a second magnetic attraction member arranged in pairs and at the same radial position on the torsion bar spring, the first magnetic attraction member being arranged at the first end portion, the second magnetic attraction member being arranged at the second end portion, the poles of the second magnetic attraction member being arranged in the axial direction, and the first magnetic attraction member and the second magnetic attraction member being attracted to each other at the second connection position.
5. The torsion bar spring according to any one of claims 1 to 4, wherein the first end portion is provided with a receiving groove, the second end portion has a mounting portion extending into the receiving groove, the connection structure includes a connection assembly including a clip block radially movably connected to the mounting portion, the first end portion is provided with a clip groove on a wall of the receiving groove,
in the first connection position, the clamping block is clamped in the clamping groove; and in the second connection position, the clamping block exits the clamping groove.
6. The torsion bar spring according to claim 5, wherein the connection assembly includes an actuator member and a resilient return member, the resilient return member being connected between the latch and the mounting portion, the actuator member being disposed on the mounting portion and configured as an electromagnet, the actuator member being in an energized state and attracting the latch out of the slot in the second connection position, the resilient return member being compressed and storing a resilient potential energy; in the first connection position, the actuating piece is in a power-off state, and the elastic reset piece pushes the clamping block to be clamped in the clamping groove.
7. A torsion bar spring according to claim 5, wherein the mounting portion is provided with a radially extending slot in which the latch is slidably disposed, wherein the latch is configured as a wedge having a gradually decreasing diameter in a radial direction gradually away from the slot.
8. A control method of a torsion bar spring, characterized in that the torsion bar spring is a torsion bar spring according to any one of claims 1 to 7, the control method comprising: determining the target rigidity of the torsion bar spring according to the sprung mass of the vehicle and a preset target offset frequency;
determining a target current according to the target stiffness and a preset corresponding relation, wherein the corresponding relation is used for indicating the relation between the stiffness of the torsion bar spring and the target current;
the target current is introduced into the torsion bar spring, and the pressing force between the first end portion and the second end portion is adjusted by adjusting the characteristic of the rigidity adjusting mechanism, so as to adjust the rigidity of the torsion bar spring.
9. The control method of the torsion bar spring according to claim 8, wherein the introducing the target current into the torsion bar spring adjusts a pressing force between the first end portion and the second end portion by adjusting a characteristic of the stiffness adjusting mechanism, comprising:
and leading the target current into a first magnetic attraction piece so as to adjust the pressing force between the first end part and the second end part by adjusting the magnetic attraction force of the first magnetic attraction piece.
10. A vehicle comprising a torsion bar spring according to any one of claims 1 to 7.
CN202210709539.9A 2022-06-21 2022-06-21 Torsion bar spring, control method thereof and vehicle Pending CN117307643A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210709539.9A CN117307643A (en) 2022-06-21 2022-06-21 Torsion bar spring, control method thereof and vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210709539.9A CN117307643A (en) 2022-06-21 2022-06-21 Torsion bar spring, control method thereof and vehicle

Publications (1)

Publication Number Publication Date
CN117307643A true CN117307643A (en) 2023-12-29

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210709539.9A Pending CN117307643A (en) 2022-06-21 2022-06-21 Torsion bar spring, control method thereof and vehicle

Country Status (1)

Country Link
CN (1) CN117307643A (en)

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