CN112709785B - Ratchet type ball screw inerter with variable inerter coefficient and capable of rotating bidirectionally - Google Patents

Ratchet type ball screw inerter with variable inerter coefficient and capable of rotating bidirectionally Download PDF

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Publication number
CN112709785B
CN112709785B CN202011540827.3A CN202011540827A CN112709785B CN 112709785 B CN112709785 B CN 112709785B CN 202011540827 A CN202011540827 A CN 202011540827A CN 112709785 B CN112709785 B CN 112709785B
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flywheel
reverse
pawl
disc
torsion spring
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CN112709785A (en
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程哲
胡茑庆
李月昊
肖卓
陈凌
胡蛟
周洋
郭策
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National University of Defense Technology
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National University of Defense Technology
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    • 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
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/30—Flywheels
    • F16F15/31—Flywheels characterised by means for varying the moment of inertia
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D41/00—Freewheels or freewheel clutches
    • F16D41/12—Freewheels or freewheel clutches with hinged pawl co-operating with teeth, cogs, or the like
    • F16D41/16—Freewheels or freewheel clutches with hinged pawl co-operating with teeth, cogs, or the like the action being reversible
    • 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
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/30—Flywheels
    • 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
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/30—Flywheels
    • F16F15/315—Flywheels characterised by their supporting arrangement, e.g. mountings, cages, securing inertia member to shaft
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transmission Devices (AREA)

Abstract

The invention discloses a bidirectional rotating ratchet type ball screw inerter with variable inerter coefficient, which comprises a forward flywheel component and a reverse flywheel component; the forward flywheel component comprises a forward thumb wheel, a forward flywheel disc and a forward unfolding mechanism, the forward thumb wheel is fixedly sleeved on the screw nut component, the forward flywheel disc sleeve and the forward thumb wheel form a ratchet structure, and the forward unfolding mechanism is arranged on the forward flywheel disc so as to change the turning radius of the forward flywheel disc; the reverse flywheel assembly comprises a reverse thumb wheel, a reverse flywheel disc and a reverse unfolding mechanism, the reverse flywheel and the reverse thumb wheel form a ratchet structure, and the reverse unfolding mechanism is arranged on the reverse flywheel disc so as to change the turning radius of the reverse flywheel disc. Under the condition that the rotation direction of the flywheel is not changed, the impact caused by the change of the rotation direction of the flywheel when the ball screw is used for accommodating and switching the movement direction is reduced. Meanwhile, on the premise of not increasing additional devices and not utilizing additional energy, the continuous variable flywheel rotational inertia is realized and the flywheel is adaptive to different working conditions.

Description

Ratchet type ball screw inerter with variable inerter coefficient and capable of rotating bidirectionally
Technical Field
The invention relates to the technical field of vibration reduction of flywheel type inerter containers, in particular to a ratchet type ball screw inerter container with variable inertial mass coefficient and bidirectional rotation, and particularly relates to a ball screw inerter container comprising a ratchet type flywheel with variable rolling inertial mass coefficient and bidirectional rotation.
Background
In 2001, "inerter" was invented by Smith, cambridge university. The new mechanical element can provide a very large amount of inertia with a very small structural mass. An ideal inerter element is defined as a single-channel mechanical element with two relatively independent and free-moving end points that are forced equally and oppositely and are proportional to the relative acceleration. According to the structural principle, the inerter is divided into four types, namely a mechanical type, a hydraulic type, an electromechanical type, an electromagnetic type and the like. In addition, the relative relationship between the transmission motions can be classified into a coaxial linear type, a parallel axis type, a torsion type, and the like. Linear mechanical inerter, most commonly consisting of a transmission mechanism to effect the conversion of motion and a flywheel to store energy and provide the main moment of inertia.
For a disk-shaped flywheel, the moment of inertia of its rotation about its length is quadratic to its radius, i.e.
Figure BDA0002854511370000011
Wherein J is the moment of inertia, m is the flywheel mass, and R is the flywheel radius. When the mass of the flywheel is unchanged, the rotation radius of the flywheel is increased, and the rotational inertia of the flywheel is increased. For the inertia container with the flywheel with fixed rotational inertia, the inertia mass coefficient of the inertia container cannot adapt to the changing working condition, particularly the impact effect caused by the invariableness of the rotational inertia at the moment of large load action, and the use efficiency of the inertia container is greatly limited.
For the ball screw inerter, the expression of the virtual mass, also called the inerter coefficient b, is:
Figure BDA0002854511370000012
wherein, I is the moment of inertia of the rotating part (mainly a flywheel) around the rotating shaft thereof, and P is the lead of the ball screw pair. In the prior art, a single flywheel is generally adopted, and impact caused when the rotation direction of the flywheel is changed by the inertia capacity of the ball screw can influence the smoothness of the inertia capacity of the ball screw.
Disclosure of Invention
Aiming at the defects that the flywheel used by a common inertial container in the prior art is invariable in rotational inertia and is difficult to bear instantaneous large load and the problem of influence of impact on the inertial capacity smoothness of the ball screw caused by the fact that the common ball screw inertial capacity changes the rotation direction of the flywheel is solved, the invention provides the ratchet type ball screw inertial container with the variable inertial mass coefficient, which ensures the invariability of the inertial mass coefficient when the inertial capacity movement direction of the ball screw is switched; and each flywheel does not need to change the rotation direction, thereby reducing the impact of the ball screw caused by the change of the rotation direction of the flywheel, and simultaneously realizing the continuous change of the rotational inertia of the flywheel and the self-adaption to different working conditions on the premise of not increasing additional devices and not using additional energy.
In order to achieve the purpose, the invention provides a ratchet type ball screw inerter with variable inerter coefficient and bidirectional rotation, which comprises a shell, a ball screw and at least one group of flywheel devices, wherein an accommodating cavity is arranged in the shell, and the flywheel devices are rotationally connected to the ball screw and are positioned in the accommodating cavity;
the flywheel device comprises a lead screw nut component, at least one forward flywheel component and at least one reverse flywheel component, wherein the lead screw nut component is in threaded fit with a ball screw to form a ball screw pair;
the forward flywheel component comprises a forward shifting wheel, a forward flywheel disc, a forward pawl mechanism and a forward unfolding mechanism, the forward shifting wheel is fixedly sleeved on the screw nut component, the forward flywheel disc is sleeved on the forward shifting wheel and matched with the forward shifting wheel through the forward pawl mechanism to form a first ratchet structure, and the forward unfolding mechanism is arranged on the forward flywheel disc and used for adaptively changing the turning radius of the forward flywheel disc in the rotation process of the forward flywheel disc;
the reverse flywheel component comprises a reverse thumb wheel, a reverse flywheel disc, a reverse pawl mechanism and a reverse unfolding mechanism, the reverse thumb wheel is fixedly sleeved on the screw nut component, the reverse flywheel disc is sleeved on the reverse thumb wheel and matched with the reverse thumb wheel through the reverse pawl mechanism to form a second ratchet wheel structure, and the reverse unfolding mechanism is arranged on the reverse flywheel disc and used for adaptively changing the turning radius of the reverse flywheel disc in the rotation process of the reverse flywheel disc;
The forward flywheel disc and the reverse flywheel disc are opposite in rotating direction, and the mass and the rotational inertia of the forward flywheel assembly and the reverse flywheel assembly are equal;
in the same group of flywheel devices, the number of the forward flywheel assemblies is equal to that of the reverse flywheel assemblies.
In one embodiment, the forward thumb wheel and the forward flywheel disc are both of circular ring structures, and the forward pawl mechanism comprises a first ratchet groove, a first pawl and a first torsion spring;
the first ratchet wheel groove is formed in one of the edge of the outer ring of the forward thumb wheel and the edge of the inner ring of the forward flywheel disc, the first pawl groove is formed in the other of the edge of the outer ring of the forward thumb wheel and the edge of the inner ring of the forward flywheel disc, the tail end of the first pawl is rotatably connected into the first pawl groove, the head end of the first pawl is in contact fit with the first ratchet wheel groove, and the first pawl only has a stroke moving along one direction of the first ratchet wheel groove;
the first torsion spring is arranged in the first pawl groove and adjacent to the first pawl, one end of the first torsion spring is abutted against the first pawl, and the other end of the first torsion spring is abutted against the groove wall of the first pawl groove, so that the head end of the first pawl is constantly contacted with the groove wall of the first ratchet groove under the action of the pretightening force of the first torsion spring.
In one embodiment, the forward flywheel assembly further comprises a first flywheel anti-flying cover, and the first flywheel anti-flying cover is fixedly arranged on the forward flywheel disc and covers the matching position between the first ratchet groove and the first pawl.
In one embodiment, the forward deployment mechanism comprises a plurality of forward deployment flywheels;
the edge position of the forward flywheel disc is provided with a plurality of forward flywheel connecting parts which are in one-to-one correspondence with the forward unfolding flywheels at intervals along the circumferential direction of the forward flywheel disc;
the head end of the forward unfolding flywheel is rotatably connected to a position, close to the head end, of the connecting part of the corresponding forward flywheel;
the tail end of the forward unfolding flywheel has a stroke close to or far away from the tail end of the corresponding forward flywheel connecting part in the rotating process of the forward unfolding flywheel, and therefore the continuous variable turning radius of the forward flywheel disc is achieved.
In one embodiment, a second torsion spring is arranged on the forward flywheel connecting part and close to the head end of the forward flywheel connecting part, one end of the second torsion spring abuts against the head end of the corresponding forward flywheel connecting part, the other end of the second torsion spring abuts against the head end of the corresponding forward unfolding flywheel, and the second torsion spring has a pre-tightening force;
When the forward flywheel disc is in a standing state, under the action of the pre-tightening force of the second torsion spring, the tail end of the forward unfolding flywheel is in a state closest to the tail end of the corresponding forward flywheel connecting part;
when the rotating speed of the forward flywheel discs is gradually increased and the rotating centrifugal force is larger than the pretightening force of the second torsion spring, the tail end of each forward unfolding flywheel is gradually far away from the tail end of the corresponding forward flywheel connecting part.
In one embodiment, the reverse thumb wheel and the reverse flywheel disc are both of circular ring structures, and the reverse pawl mechanism comprises a second ratchet groove, a second pawl and a third torsion spring;
the second ratchet wheel groove is formed in one of the edge of the outer ring of the reverse thumb wheel and the edge of the inner ring of the reverse flywheel disc, the second pawl groove is formed in the other of the edge of the outer ring of the reverse thumb wheel and the edge of the inner ring of the reverse flywheel disc, the tail end of the second pawl is rotatably connected into the second pawl groove, the head end of the second pawl is in contact fit with the second ratchet wheel groove, and the second pawl only has a stroke moving in one direction along the second ratchet wheel groove;
the third torsion spring is arranged in the second pawl groove and adjacent to the second pawl, one end of the third torsion spring is abutted against the second pawl, and the other end of the third torsion spring is abutted against the groove wall of the second pawl groove, so that the head end of the second pawl is constantly contacted with the groove wall of the second ratchet groove under the action of the pretightening force of the third torsion spring.
In one embodiment, the reverse flywheel assembly further comprises a second flywheel anti-flying cover, and the second flywheel anti-flying cover is fixedly arranged on the reverse flywheel disc and covers the matching position between the second ratchet groove and the second pawl.
In one embodiment, the reverse deployment mechanism comprises a plurality of reverse deployment flywheels;
the edge position of the reverse flywheel disc is provided with a plurality of reverse flywheel connecting parts which are in one-to-one correspondence with the reverse unfolded flywheels at intervals along the circumferential direction of the reverse flywheel disc;
the head end of the reverse unfolding flywheel is rotatably connected to the position, close to the head end, of the corresponding reverse flywheel connecting part;
the tail end of the reversely unfolded flywheel has a stroke close to or far away from the tail end of the corresponding reverse flywheel connecting part in the rotating process of the reversely unfolded flywheel, so that the continuous variable turning radius of the reverse flywheel disc is realized.
In one embodiment, a fourth torsion spring is arranged on the reverse flywheel connecting part near the head end of the reverse flywheel connecting part, one end of the fourth torsion spring abuts against the head end of the corresponding reverse flywheel connecting part, the other end of the fourth torsion spring abuts against the head end of the corresponding reverse unfolding flywheel, and the fourth torsion spring has a pre-tightening force;
When the reverse flywheel disc is in a standing state, under the action of the pre-tightening force of the fourth torsion spring, the tail end of the reverse unfolding flywheel is in a state closest to the tail end of the corresponding reverse flywheel connecting part;
when the rotating speed of the reverse flywheel discs is gradually increased and the rotating centrifugal force is larger than the pretightening force of the fourth torsion spring, the tail end of each reverse unfolding flywheel is gradually far away from the tail end of the corresponding reverse flywheel connecting part.
In one embodiment, the screw nut assembly comprises a first screw flange nut and a second screw flange nut, the forward flywheel assembly is arranged on the first screw flange nut, and the reverse flywheel assembly is arranged on the second screw flange nut;
the first screw flange nut comprises a first nut part in threaded fit with the ball screw and a first flange part fixedly arranged on the first nut part, and the second screw flange nut comprises a second nut part in threaded fit with the ball screw and a second flange part fixedly arranged on the second nut part;
the forward shifting wheel is sleeved on the first nut portion and fixedly connected with the first flange portion, and the reverse shifting wheel is sleeved on the second nut portion and fixedly connected with the second flange portion.
Compared with the prior art, the bidirectional rotating ratchet type ball screw inerter with variable inerter coefficient provided by the invention has the following beneficial effects:
1. the translation direction of the ball screw is changed under the condition that the rotation direction and the rotational inertia of the flywheel are not changed, and the impact caused by the change of the rotation direction of the flywheel when the inertia capacity of the ball screw is switched to the movement direction is reduced;
2. under the premise of not increasing additional devices and not utilizing additional energy, the continuous variable flywheel rotational inertia is realized and the flywheel is adaptive to different working conditions;
3. the structure is compact, and the increased occupied space is small;
4. a plurality of flywheel devices can be arranged according to condition requirements, and the number of the forward flywheel assemblies and the number of the reverse flywheel assemblies in different flywheel devices can be adjusted according to the actual condition;
5. simple manufacture and assembly, low manufacturing cost and good engineering application value.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a sectional view of an internal structure of a bidirectional rotary ratchet type ball screw inerter with a variable inerter coefficient according to an embodiment of the invention;
FIG. 2 is an isometric view of the whole structure of the rotating part of the bidirectional rotating ratchet type ball screw inerter with variable inerter coefficient in the embodiment of the invention;
FIG. 3 is a front view of the overall structure of the forward flywheel assembly without the first flywheel anti-flying cover and with the forward deployed flywheels deployed in accordance with the embodiment of the present invention;
FIG. 4 is a front view of the overall structure of the forward flywheel assembly of the present invention without the first flywheel anti-flying cover and with the forward deployed flywheels closed;
FIG. 5 is a front view of the overall structure of the forward flywheel assembly including the first flywheel anti-flying cover and each of the forward deployed flywheels of the embodiment of the present invention as deployed;
FIG. 6 is a front view of a positive pawl mechanism attachment structure in an embodiment of the present invention;
FIG. 7 is a front view of the attachment structure of the forward deployment mechanism in an embodiment of the present invention;
FIG. 8 is an isometric view of a forward flywheel disc in an embodiment of the invention;
FIG. 9 is a front view of the flywheel shown in a forward deployment configuration in accordance with an embodiment of the present invention;
FIG. 10 is a front view of a first pawl in an embodiment of the present invention;
FIG. 11 is a front view of the overall structure of the embodiment of the present invention when the reverse flywheel assembly does not include the second flywheel anti-fly cover and each of the reversely deployed flywheels is deployed;
FIG. 12 is a front view of the overall structure of the embodiment of the present invention in which the reverse flywheel assembly does not include a second flywheel anti-fly cover and each of the reversely deployed flywheels is closed;
FIG. 13 is a front view of the overall structure of the embodiment of the present invention in which the reverse flywheel assembly includes a second flywheel anti-flying cover and each of the reversely deployed flywheels is deployed;
FIG. 14 is a front view of a reverse pawl mechanism attachment structure in an embodiment of the present invention;
FIG. 15 is a front view of the attachment structure of the reverse deployment mechanism in an embodiment of the present invention;
FIG. 16 is an isometric view of an inverted flywheel disk of an embodiment of the invention;
FIG. 17 is a front view of a reverse deployment flywheel in accordance with an embodiment of the present invention;
FIG. 18 is a front view of a second pawl in an embodiment of the present invention;
FIG. 19 is an isometric view of a first flange lead screw nut in an embodiment of the invention;
FIG. 20 is an isometric view of a second flange lead screw nut in an embodiment of the invention;
fig. 21 is a front view of a first pin bolt in an embodiment of the invention.
Reference numerals:
the ball screw 10: a lead screw limiter 101;
forward flywheel assembly 20:
the forward dial wheel 201 and the fourth threaded hole 2011;
a forward flywheel disc 202, a tenth threaded hole 2021, a first mounting groove 2022, a forward flywheel connecting portion 2023, a thirteenth threaded hole 20231, a fourteenth threaded hole 20232, a first spoke-shaped protrusion 2024 and a first annular baffle 2025;
A forward pawl mechanism 203, a first ratchet groove 2031, a first pawl groove 2032, a first pawl 2033, a first through hole 20331, a first torsion spring 2034;
a forward unfolding mechanism 204, a forward unfolding flywheel 2041, a third through hole 20411, a second torsion spring 2042, a third pin shaft screw 2043 and a fourth pin shaft screw 2044;
a first flywheel anti-flying cover 205;
reverse flywheel assembly 30:
the reverse thumb wheel 301 and the sixth threaded hole 3011;
a reverse flywheel disc 302, a twelfth threaded hole 3021, a second mounting groove 3022, a reverse flywheel connecting portion 3023, a fifteenth threaded hole 30231, a sixteenth threaded hole 32232, a second spoke-shaped protrusion 3024, and a second annular baffle 3025;
a reverse pawl mechanism 303, a second ratchet groove 3031, a second pawl groove 3032, a second pawl 3033, a second through hole 30331 and a third torsion spring 3034;
a reverse unfolding mechanism 304, a reverse unfolding flywheel 3041, a fourth through hole 30411, a fourth torsion spring 3042, a seventh pin bolt 3043, and an eighth pin bolt 3044;
a second flywheel anti-flying cover 305;
the nut comprises a first lead screw flange nut 401, a first nut part 4011, a first flange part 4012, a third threaded hole 4013, a second lead screw flange nut 402, a second nut part 4021, a second flange part 4022 and a fifth threaded hole 4023;
A thrust bearing 50;
a first pin shaft screw 601, a first nut 6011, a first optical axis section 6012, a first thread section 6013, a second pin shaft screw 602, a fifth pin shaft screw 603, and a sixth pin shaft screw 604;
a first flat-head socket head cap screw 701 and a second flat-head socket head cap screw 702;
the device comprises a shell 801, a cover body 802, a cover body 803 and an accommodating cavity 804.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes 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 of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; the connection can be mechanical connection, electrical connection, physical connection or wireless communication connection; 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 addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of the technical solutions by those skilled in the art, and when the technical solutions are contradictory to each other or cannot be realized, such a combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
Fig. 1 to 21 show the embodiment of the present disclosure, which specifically includes a housing, a ball screw 10, and at least one set of flywheel device, where the housing is provided with an accommodating cavity 804, and the flywheel device is rotatably connected to the ball screw and located in the accommodating cavity 804. The flywheel device comprises a screw nut assembly, at least one forward flywheel assembly 20 and at least one reverse flywheel assembly 30, wherein the screw nut assembly and the ball screw 10 are in threaded fit to form a ball screw pair. Specifically, the forward flywheel assembly 20 includes a forward thumb wheel 201, a forward flywheel disc 202, a forward pawl mechanism 203 and a forward unfolding mechanism 204, the forward thumb wheel 201 is fixedly sleeved on the screw nut assembly, the forward flywheel disc 202 is sleeved on the forward thumb wheel 201 and is matched with the forward thumb wheel 201 through the forward pawl mechanism 203 to form a first ratchet structure, and the forward unfolding mechanism 204 is arranged on the forward flywheel disc 202 to be used for adaptively changing the turning radius of the forward flywheel disc 202 in the rotation process of the forward flywheel disc 202. Reverse flywheel subassembly 30 includes reverse thumb wheel 301, reverse flywheel dish 302, reverse pawl mechanism 303 and reverse expansion mechanism 304, reverse thumb wheel 301 is fixed to overlap to be established on the screw nut subassembly, reverse flywheel dish 302 cover is established on reverse thumb wheel 301 and is constituteed the second ratchet structure through reverse pawl mechanism 303 and reverse thumb wheel 301 cooperation, reverse expansion mechanism 304 is established on reverse flywheel dish 302, in order to be used for the radius of gyration that the rotatory in-process self-adaptation of reverse flywheel dish 302 changes reverse flywheel dish 302.
Forward flywheel assembly 20 and reverse flywheel assembly 30 have equal mass and moment of inertia, and forward flywheel disc 202 and reverse flywheel disc 302 rotate in opposite directions. For example: when the input force on the ball screw 10 is in the forward direction, the forward thumb wheel 201 and the reverse thumb wheel 301 are fixedly connected with the screw nut assembly and rotate forward along with the screw nut assembly, at the moment, the forward flywheel disc 202 also rotates forward under the driving of the forward pawl mechanism 203, and the forward unfolding mechanism 204 gradually unfolds under the action of centrifugal force when rotating along with the forward flywheel disc 202, so that the turning radius of the forward flywheel disc 202 is adaptively changed; while the reverse flywheel disc 302 is idle with respect to the reverse thumb wheel 301. When the input force on the ball screw 10 is negative, the positive thumb wheel 201 and the reverse thumb wheel 301 are fixedly connected with the screw nut component and rotate reversely along with the screw nut component, at this time, the reverse flywheel disc 302 also rotates reversely under the driving of the reverse pawl mechanism 303, and when the reverse unfolding mechanism 304 rotates along with the reverse flywheel disc 302, the reverse unfolding mechanism gradually unfolds under the action of centrifugal force, so that the turning radius of the reverse flywheel disc 302 is adaptively changed; while forward flywheel disc 202 is now freewheeling with respect to forward thumb wheel 201. That is, only one of forward flywheel disc 202 and reverse flywheel disc 302 rotates at the same time, the input force is divided into a positive part and a negative part which act on forward flywheel disc 202 and reverse flywheel disc 302 respectively, the rotating directions of forward flywheel disc 202 and reverse flywheel disc 302 do not need to be changed, and the rotating motions of forward flywheel disc 202 and reverse flywheel disc 302 do not affect each other, so that the relative impulse acting on the inertia capacity of the ball screw is reduced, and the structural vibration of the inertia capacity of the ball screw is reduced. The positive or negative of the input force to the ball screw 10 is related to the displacement direction of the ball screw 10, and for example, the input force when the ball screw 10 is displaced upward may be defined as positive, and the input force when the ball screw 10 is displaced downward may be defined as negative.
It should be noted that the number of forward flywheel assemblies 20 and reverse flywheel assemblies 30 in the same set of flywheel devices is equal. Although two forward flywheel assemblies 20 and two reverse flywheel assemblies 30 are illustrated in the present embodiment, one or more than three forward flywheel assemblies 20 and three reverse flywheel assemblies 30 can be provided. For example, three sets of flywheel devices can be disposed on the ball screw 10 according to the requirements of conditions, a first set of flywheel devices has one forward flywheel assembly 20 and one backward flywheel assembly 30, a second set of flywheel devices has two forward flywheel assemblies 20 and two backward flywheel assemblies 30, and a third set of flywheel devices has three forward flywheel assemblies 20 and three backward flywheel assemblies 30, and so on. It is also possible to provide only one set of flywheel devices on the ball screw 10, and to provide one forward flywheel assembly 20 and one backward flywheel assembly 30 on the flywheel devices.
In a preferred embodiment, the screw nut assembly comprises a first screw flange nut 401 and a second screw flange nut 402 modified from SFU series ball screw nuts, the forward flywheel assembly 20 is disposed on the first screw flange nut 401, and the reverse flywheel assembly 30 is disposed on the second screw flange nut 402. Specifically, first lead screw flange nut 401 includes first nut portion 4011 and the fixed first flange portion 4012 of establishing on first nut portion 4011 with ball 10 screw thread fit, wherein, be equipped with third screw hole 4013 on the first nut portion 4011, be equipped with the fourth screw hole 2011 that corresponds with third screw hole 4013 on the forward thumb wheel 201, forward thumb wheel 201 is through first screw fixed connection on first flange portion 4012, and the inner wall of forward thumb wheel 201 is laminated with the outer wall of first nut portion 4011 mutually. The second screw flange nut 402 comprises a second nut portion 4021 in threaded fit with the ball screw 10 and a second flange portion 4022 fixedly arranged on the second nut portion 4021, wherein a fifth threaded hole 4023 is formed in the second nut portion 4021, a sixth threaded hole 3011 corresponding to the fifth threaded hole 4023 is formed in the reverse thumb wheel 301, the reverse thumb wheel 301 is fixedly connected to the second flange portion 4022 through a second screw, and the inner wall of the reverse thumb wheel 301 is attached to the outer wall of the second nut portion 4021. Of course, the forward thumb wheel 201 and the first lead screw flange nut 401, and the reverse thumb wheel 301 and the second lead screw flange nut 402 may not have the above-mentioned structure, and may also have other fixing structures, such as welding and gluing. Moreover, in the specific implementation process of the present application, a structure that does not divide the screw nut assembly into the first screw flange nut 401 and the second screw flange nut 402 may be selected, and two flange surfaces may be provided on one screw nut, so that the above-described effects can be achieved.
In this embodiment, the ball screw 10 is sleeved with a plurality of thrust bearings 50 for supporting and separating the first screw flange nut 401 and the second screw flange nut 402. For example, the dual-rotation ratchet ball screw inerter with variable inerter coefficient in this embodiment has only one flywheel device, and the flywheel device has only one forward flywheel assembly 20 and one reverse flywheel assembly 30. Therefore, three thrust bearings 50 are sleeved on the ball screw 10, wherein one thrust bearing is located between the first screw flange nut 401 and the second screw flange nut 402, the other two thrust bearings are located at two opposite ends of the first screw flange nut 401 and the second screw flange nut 402, the outer wall of each thrust bearing 50 can be fixedly connected with the shell, and the first screw flange nut 401 and the second screw flange nut 402 can be supported and separated.
In a preferred embodiment, the forward thumb wheel 201 and the forward flywheel 202 are both circular ring structures, and the forward pawl mechanism 203 includes a first ratchet groove 2031, a first pawl groove 2032, a first pawl 2033 and a first torsion spring 2034. Specifically, the first ratchet groove 2031 is provided on one of the outer ring edge of the forward thumb wheel 201 and the inner ring edge of the forward flywheel disc 202, the first pawl groove 2032 is provided on the other of the outer ring edge of the forward thumb wheel 201 and the inner ring edge of the forward flywheel disc 202, the tail end of the first pawl 2033 is rotatably connected in the first pawl groove 2032, the head end of the first pawl 2033 is in contact fit with the first ratchet groove 2031, and the first pawl 2033 has only a stroke moving in one direction of the first ratchet groove 2031; in the embodiment shown, the first ratchet groove 2031 is provided on the inner ring edge of the forward flywheel 202, and the first pawl groove 2032 is provided on the outer ring edge of the forward thumb wheel 201. More specifically, the first torsion spring 2034 is disposed in the first pawl groove 2032 adjacent to the first pawl 2033, and one end of the first torsion spring 2034 abuts against the first pawl 2033, and the other end abuts against a groove wall of the first pawl groove 2032, so that a head end of the first pawl 2033 is in contact with the groove wall of the first ratchet groove 2031 at any time under the pre-tightening force of the first torsion spring 2034, and the first pawl 2033 unidirectionally transmits the torque of the forward thumbwheel 201 under the pre-tightening force of the first torsion spring 2034.
Preferably, the first pawl 2033 is rotationally connected in the first pawl groove 2032 through a first pin bolt 601, wherein the first pin bolt 601 includes a first nut 6011, a first optical axis section 6012 and a first threaded section 6013 that are sequentially connected from top to bottom, a first threaded hole is formed in the first pawl groove 2032 at a rotational position corresponding to the first pawl 2033, a first through hole 20331 corresponding to the first threaded hole is formed in the first pawl 2033, the first threaded section 6013 penetrates through the first through hole 20331 of the first pawl 2033 and then is in threaded fit with the first threaded hole, and the first pawl 2033 is rotationally connected on the first optical axis section 6012. The first nut 6011 is adapted to limit the play of the first pawl 2033 along the length of the first pin screw 601. Further, the first nut 6011 is provided with a straight groove for the use of a general tool for disassembling and assembling, but not limited to the straight groove, which can be matched with the general tool for disassembling and assembling. Of course, the connection structure between the first pawl 2033 and the first pawl groove 2032 is not limited to the first hinge screw 601, and other connection members, such as a hinge, etc., may be used to achieve the same effect.
Further preferably, in the present embodiment, the first torsion spring 2034 is disposed at a corresponding position of the first pawl groove 2032 by the second pin screw 602. The second pin shaft screw 602 includes a second nut, a second optical axis section and a second thread section, which are sequentially connected from top to bottom, and a seventh threaded hole is formed in the first pawl groove 2032 corresponding to the rotation position of the first torsion spring 2034; the second threaded section is threaded in the seventh threaded bore and the first torsion spring 2034 is sleeved on the second optical axis section. The second nut is used to limit the first torsion spring 2034 from moving along the length direction of the second pin bolt 602, wherein an insertion groove capable of inserting the first torsion spring 2034 is formed on the second optical axis section, so as to further limit the movement of the first torsion spring 2034. Furthermore, the second nut is provided with a straight groove for disassembling and assembling the general tool, but not limited to the straight groove, and the straight groove can be matched with the general disassembling and assembling tool. Of course, the coupling structure between the first torsion spring 2034 and the first pawl groove 2032 is not limited to the second pin screw 602, but other coupling members, such as a fixed shaft, etc., that achieve the same effect may be used.
Still further preferably, the forward flywheel assembly 20 further includes a first flywheel anti-flying cover 205, and the first flywheel anti-flying cover 205 is fixedly disposed on the forward flywheel disc 202 and covers a matching position between the first ratchet groove 2031 and the first pawl 2033, so that the first flywheel anti-flying cover 205 and the first annular baffle 2025 on the forward flywheel disc 202 together limit radial and axial play of the forward flywheel disc 202. A first mounting groove 2022 is formed in the position, close to the edge of the inner ring, of the forward flywheel disc 202, a ninth threaded hole is formed in the first flywheel anti-flying cover 205, a tenth threaded hole 2021 corresponding to the ninth threaded hole is formed in the first mounting groove 2022, the first flywheel anti-flying cover 205 is fixedly embedded and connected in the first mounting groove 2022 through a first flat-head inner hexagonal screw 701, the ninth threaded hole and the tenth threaded hole 2021, and radial and axial limiting of the forward flywheel disc 202 is achieved.
As a preferred embodiment, the forward unfolding mechanism 204 includes a plurality of forward unfolding flywheels 2041, and a plurality of forward flywheel connecting portions 2023 corresponding to the forward unfolding flywheels 2041 one by one are arranged at intervals along the circumferential direction of the forward flywheel disc 202 at the edge of the forward flywheel disc 202; the head end of the forward unfolding flywheel 2041 is rotatably connected to a position on the corresponding forward flywheel connecting part 2023 close to the head end thereof; the tail end of the forward unfolding flywheel 2041 has a stroke close to or far away from the tail end of the corresponding forward flywheel connecting portion 2023 in the rotation process of the forward unfolding flywheel 2041, wherein no connecting structure exists between the tail end of the forward unfolding flywheel 2041 and the forward flywheel disc 202, and under the action of centrifugal force in the rotation process of the forward flywheel disc 202, the tail end of the forward unfolding flywheel 2041 can be gradually far away from the tail end of the corresponding forward flywheel connecting portion 2023, so that the turning radius of the forward flywheel disc 202 is continuously increased in the turning process, the rotational inertia of the forward flywheel disc 202 is increased, the increasing process is continuous and is adaptive to the rotating speed of the forward flywheel disc 202, and the rotational inertia of the forward flywheel disc 202 is adaptive to continuous variation.
Further, a second torsion spring 2042 is disposed on the forward flywheel connecting portion 2023 near the head end thereof, one end of the second torsion spring 2042 abuts against the head end of the corresponding forward flywheel connecting portion 2023, and the other end abuts against the head end of the corresponding forward expanding flywheel 2041. The second torsion spring 2042 has a pre-tightening force, which urges the tail end of the forward-expanding flywheel 2041 to approach the tail end of the corresponding forward flywheel connecting portion 2023. Therefore, when forward flywheel disc 202 is in a static state, forward unfolding flywheel 2041 is only subjected to the pretightening force of second torsion spring 2042, under the pretightening force, the tail end of forward unfolding flywheel 2041 is in a state closest to the tail end of corresponding forward flywheel connecting portion 2023, and the turning radius of forward flywheel disc 202 is minimum. When the rotating speed of the forward flywheel discs 202 gradually increases, the rotating centrifugal force borne by the forward unfolding flywheels 2041 gradually increases, and when the rotating centrifugal force is greater than the pre-tightening force of the second torsion springs 2042, the tail ends of the forward unfolding flywheels 2041 are gradually far away from the tail ends of the corresponding forward flywheel connecting portions 2023 under the action of the rotating centrifugal force, so that the turning radius of the forward flywheel discs 202 gradually increases, and the continuous variation of the rotational inertia of the forward flywheel discs 202 is realized.
Preferably, in addition to the abutting connection between the two ends of the second torsion spring 2042 and the forward flywheel connecting portion 2023 and the forward unfolding flywheel 2041, a snap connection or a hook connection may be adopted to prevent the second torsion spring 2042 from deflecting during a force application process.
In a preferred embodiment, a plurality of first spoke-shaped protrusions 2024 are arranged at intervals along the circumferential direction of the forward flywheel disc 202 at the edge position of the forward flywheel disc 202, a forward flywheel connecting portion 2023 is arranged between every two adjacent first spoke-shaped protrusions 2024, and the head end of the forward flywheel connecting portion 2023 is a side wall corresponding to the first spoke-shaped protrusions 2024. The first spoke-shaped protrusion 2024 not only has the function of connecting the second torsion spring 2042, but also has the function of limiting the forward expansion flywheel 2041, thereby avoiding collision between adjacent forward expansion flywheels 2041 due to overlarge rotation angle.
In this embodiment, the forward flywheel disc 202 is provided with a first annular baffle 2025, the inner side of the first annular baffle 2025 is a first mounting groove 2022, and the outer side is a forward flywheel connecting portion 2023. The forward expanding flywheel 2041 has a fan-shaped structure, the radius of its inner arc is equal to the radius of the first annular baffle 2025, and the size of its outer arc can be changed according to the required moment of inertia. When the forward flywheel discs 202 are in standing, the inner circular arcs of the forward unfolding flywheels 2041 are completely attached to the outer wall of the first annular baffle 2025 of the forward flywheel discs 202; after the rotational speed of forward flywheel disc 202 is gradually increased to a certain level, the inner arc of each forward unfolding flywheel 2041 is gradually separated from first annular baffle 2025 of forward flywheel disc 202.
In this embodiment, the forward unfolding flywheels 2041 are rotatably connected to the corresponding forward flywheel connecting portions 2023 by third pin screws 2043. The third pin shaft screw 2043 comprises a third nut, a third optical axis section and a third thread section which are sequentially connected from top to bottom, a thirteenth threaded hole 20231 is formed in the forward flywheel connecting portion 2023 corresponding to the rotating position of the forward unfolding flywheel 2041, and a third through hole 20411 corresponding to the thirteenth threaded hole 20231 is formed in the forward unfolding flywheel 2041; the third thread section passes through a third through hole 20411 on the forward expansion flywheel 2041 and then is in thread fit with a thirteenth threaded hole 20231, and the forward expansion flywheel 2041 is rotatably connected to the third optical axis section. The third nut is used to limit the play of the forward extending flywheel 2041 along the length of the third pin bolt 2043. Preferably, the third nut is provided with a straight groove for disassembling and assembling the universal tool, but not limited to the straight groove, and the third nut can be matched with the universal disassembling and assembling tool. Of course, the connection structure between the forward unfolding flywheel 2041 and the corresponding forward flywheel connection portion 2023 is not limited to the third pin bolt 2043, and other connection members, such as hinges, may be used to achieve the same effect.
In this embodiment, the second torsion spring 2042 is disposed on the corresponding forward flywheel connecting portion 2023 by a fourth pin 2044. The fourth pin shaft screw 2044 comprises a fourth screw cap, a fourth optical axis section and a fourth thread section which are sequentially connected from top to bottom, and a fourteenth threaded hole 20232 is formed in the forward flywheel connecting portion 2023 corresponding to the rotating position of the second torsion spring 2042; the fourth threaded section is threadedly connected in the fourteenth threaded hole 20232, and the second torsion spring 2042 is sleeved on the fourth optical axis section. The fourth nut is used to limit the second torsion spring 2042 from moving along the length direction of the fourth pin screw 2044, wherein preferably, an insertion groove into which the second torsion spring 2042 can be inserted is formed on the fourth optical axis section, so as to further limit the moving of the second torsion spring 2042. Further preferably, the fourth nut is provided with a straight groove for use in disassembling and assembling a general tool, but not limited to the straight groove, and the straight groove can be matched with the general disassembling and assembling tool. Of course, the connection structure between the second torsion spring 2042 and the corresponding forward flywheel connection portion 2023 is not limited to the fourth pin bolt 2044, and other connection members, such as a fixed shaft, may be used to achieve the same effect.
As a preferred embodiment, the reversing thumb wheel 301 and the reversing flywheel plate 302 are both of a circular ring structure, and the reversing pawl mechanism 303 includes a second ratchet wheel groove 3031, a second pawl groove 3032, a second pawl 3033 and a third torsion spring 3034. Specifically, a second ratchet groove 3031 is arranged on one of the outer ring edge of the reverse thumb wheel 301 and the inner ring edge of the reverse flywheel disc 302, a second pawl groove 3032 is arranged on the other of the outer ring edge of the reverse thumb wheel 301 and the inner ring edge of the reverse flywheel disc 302, the tail end of the second pawl 3033 is rotatably connected in the second pawl groove 3032, the head end of the second pawl 3033 is in contact fit with the second ratchet groove 3031, and the second pawl 3033 only has a stroke moving in one direction of the second ratchet groove 3031; in this embodiment, a second ratchet groove 3031 is shown on the inner ring edge of the reverse flywheel disc 302, and a second pawl groove 3032 is shown on the outer ring edge of the reverse thumb wheel 301. More specifically, the third torsion spring 3034 is disposed in the second pawl slot 3032 at a position adjacent to the second pawl 3033, and one end of the third torsion spring 3034 abuts against the second pawl 3033, and the other end of the third torsion spring 3034 abuts against a groove wall of the second pawl slot 3032, so that a head end of the second pawl 3033 is constantly in contact with the groove wall of the second ratchet wheel slot 3031 under the pre-tightening force of the third torsion spring 3034, and the second pawl 3033 unidirectionally transmits the torque of the reverse thumb wheel 301 under the pre-tightening force of the third torsion spring 3034.
Preferably, the second pawl 3033 is rotatably connected in the second pawl slot 3032 by a fifth pin shaft screw 603, wherein the fifth pin shaft screw 603 includes a fifth nut, a fifth optical axis segment and a fifth threaded segment which are sequentially connected from top to bottom, a second threaded hole is formed in the second pawl slot 3032 at a position corresponding to the rotation position of the second pawl 3033, a second through hole 30331 corresponding to the second threaded hole is formed in the second pawl 3033, the fifth threaded segment penetrates through the second through hole 30331 on the second pawl 3033 and then is in threaded fit with the second threaded hole, and the second pawl 3033 is rotatably connected on the fifth optical axis segment. The fifth nut serves to limit the play of the second pawl 3033 along the length of the fifth pin bolt 603. Furthermore, the fifth nut is provided with a straight groove for disassembling and assembling the general tool, but not limited to the straight groove, and the fifth nut can be matched with the general disassembling and assembling tool. Of course, the connection structure between the second pawl 3033 and the second pawl slot 3032 is not limited to the fifth pin screw, and other connection members, such as a hinge, etc., may be used to achieve the same effect.
Further preferably, in this embodiment, the third torsion spring 3034 is disposed at a position corresponding to the second pawl slot 3032 by the sixth pin shaft screw 604. The sixth pin shaft screw 604 comprises a sixth screw cap, a sixth optical axis section and a sixth thread section which are sequentially connected from top to bottom, and an eighth threaded hole is formed in the second pawl slot 3032 corresponding to the rotating position of the third torsion spring 3034; the sixth threaded section is in threaded connection with the eighth threaded hole, and the third torsion spring 3034 is sleeved on the sixth optical axis section. The sixth nut is configured to limit the third torsion spring 3034 from moving along the length direction of the sixth pin shaft screw 604, wherein an insertion groove into which the third torsion spring 3034 can be inserted is formed on the sixth optical axis section, so as to further limit the movement of the third torsion spring 3034. Furthermore, the sixth nut is provided with a straight groove for disassembling and assembling the general tool, but not limited to the straight groove, and the sixth nut can be matched with the general disassembling and assembling tool. Of course, the connection structure between the third torsion spring 3034 and the second pawl recess 3032 is not limited to the sixth pin bolt 604, and other connection members, such as a fixed shaft, etc., may be used to achieve the same effect.
Still further preferably, the reverse flywheel assembly 30 further includes a second flywheel anti-flying cover 305, and the second flywheel anti-flying cover 305 is fixedly disposed on the reverse flywheel disc 302 and covers the matching position between the second ratchet groove 3031 and the second pawl 3033, so that the second flywheel anti-flying cover 305 and the annular second annular baffle 3025 on the reverse flywheel disc 302 together limit the radial and axial play of the reverse flywheel disc 302. A second mounting groove 3022 is formed in the position, close to the edge of the inner ring, of the reverse flywheel disc 302, an eleventh threaded hole is formed in the second flywheel anti-flying cover 305, a twelfth threaded hole 3021 corresponding to the eleventh threaded hole is formed in the second mounting groove 3022, the second flywheel anti-flying cover 305 and the reverse flywheel disc 302 are fixedly embedded and connected in the second mounting groove 3022 through a second flat-head inner hexagonal screw 702, the eleventh threaded hole and the twelfth threaded hole 3021, and radial and axial limiting of the reverse flywheel disc 302 is achieved.
As a preferred embodiment, the reverse unfolding mechanism 304 includes a plurality of reverse unfolding flywheels 3041, and a plurality of reverse flywheel connecting portions 3023 corresponding to the reverse unfolding flywheels 3041 one by one are arranged at intervals along the circumferential direction of the reverse flywheel panel 302 at the edge position of the reverse flywheel panel 302; the head end of the reverse unfolding flywheel 3041 is rotatably connected to the position close to the head end of the corresponding reverse flywheel connecting part 3023; the tail end of the reversely-expanding flywheel 3041 has a stroke approaching or departing from the tail end of the corresponding reverse flywheel connecting portion 3023 in the rotating process of the reversely-expanding flywheel 3041, wherein no connecting structure exists between the tail end of the reversely-expanding flywheel 3041 and the reverse flywheel disc 302, and under the action of centrifugal force in the rotating process of the reverse flywheel disc 302, the tail end of the reversely-expanding flywheel 3041 gradually leaves away from the tail end of the corresponding reverse flywheel connecting portion 3023, the rotating radius of the reverse flywheel disc 302 is continuously increased in the process of changing the direction, so that the rotational inertia of the reverse flywheel disc 302 is increased, the increasing process is continuous and is adaptive to the rotating speed of the reverse flywheel disc 302, and the rotational inertia of the reverse flywheel disc 302 is continuously variable in a self-adaptive manner.
Further, a fourth torsion spring 3042 is provided on the reverse flywheel connecting portion 3023 near the front end thereof, and one end of the fourth torsion spring 3042 abuts on the front end of the corresponding reverse flywheel connecting portion 3023, and the other end abuts on the front end of the corresponding reverse deployment flywheel 3041. The fourth torsion spring 3042 has a pre-tightening force, which will urge the tail end of the reverse-unfolding flywheel 3041 to approach the tail end of the corresponding reverse flywheel connecting portion 3023. Therefore, when the reverse flywheel panel 302 is in a static state, the reverse unfolding flywheel 3041 is only subjected to the pretightening force of the fourth torsion spring 3042, and under the pretightening force, the tail end of the reverse unfolding flywheel 3041 is in a state closest to the tail end of the corresponding reverse flywheel connecting portion 3023, and at this time, the turning radius of the reverse flywheel panel 302 is minimum. When the rotating speed of the reverse flywheel panel 302 gradually increases, the rotating centrifugal force borne by the reverse unfolding flywheels 3041 gradually increases, and when the rotating centrifugal force is greater than the pre-tightening force of the fourth torsion springs 3042, the tail end of each reverse unfolding flywheel 3041 gradually keeps away from the tail end of the corresponding reverse flywheel connecting part 3023 under the action of the rotating centrifugal force, so that the turning radius of the reverse flywheel panel 302 gradually increases, and the continuous variation of the rotational inertia of the reverse flywheel panel 302 is realized.
Preferably, in addition to the connection manner of the two ends of the fourth torsion spring 3042 and the reverse flywheel connecting portion 3023 and the reverse unfolding flywheel 3041, a snap connection or a hook connection manner may be adopted to prevent the fourth torsion spring 3042 from deflecting during a force receiving process.
In a preferred embodiment, a plurality of second spoke-shaped protrusions 3024 are arranged at intervals along the circumferential direction of the reverse flywheel disk 302 at the edge position of the reverse flywheel disk 302, a reverse flywheel connecting portion 3023 is arranged between every two adjacent second spoke-shaped protrusions 3024, and the head end of the reverse flywheel connecting portion 3023 is a side wall corresponding to the second spoke-shaped protrusions 3024. The second spoke-shaped protrusions 3024 not only serve to connect the fourth torsion spring 3042, but also serve to limit the reversely-deployed flywheels 3041, thereby preventing collision between adjacent reversely-deployed flywheels 3041 due to an excessively large corner.
In this embodiment, a second annular baffle 3025 is disposed on the reverse flywheel disc 302, the second annular baffle 3025 has a second mounting groove 3022 on the inner side, and a reverse flywheel connecting portion 3023 on the outer side. The reverse deployment flywheel 3041 has a fan-shaped structure, with the radius of its inner arc equal to the radius of the second annular baffle 3025, and the outer arc having a variable size according to the required moment of inertia. When the reverse flywheel panels 302 are in standing, the inner arcs of the reverse unfolding flywheels 3041 are completely attached to the outer wall of the second annular baffle 3025 of the reverse flywheel panels 302; when the rotation speed of the reverse flywheel panels 302 gradually increases to a certain degree, the inner arc of each reverse unfolding flywheel 3041 gradually gets away from the second annular flap 3025 of the reverse flywheel panels 302.
In this embodiment, the reverse unfolding flywheels 3041 are rotatably connected to the corresponding reverse flywheel connecting portions 3023 by seventh pin bolts 3043. The seventh pin bolt 3043 includes a seventh nut, a seventh optical axis segment and a seventh thread segment that are sequentially connected from top to bottom, a fifteenth threaded hole 30231 is formed in the reverse flywheel connecting portion 3023 at a rotation position corresponding to the reverse unfolding flywheel 3041, and a fourth through hole 30411 corresponding to the fifteenth threaded hole 30231 is formed in the reverse unfolding flywheel 3041; the seventh threaded section passes through the fourth through hole 30411 on the reverse deployment flywheel 3041 and then is in threaded fit with the fifteenth threaded hole 30231, and the reverse deployment flywheel 3041 is rotatably connected to the seventh optical axis section. The seventh nut is used to limit the play of the reversely extending flywheel 3041 along the length direction of the seventh pin bolt 3043. Preferably, the seventh nut is provided with a straight groove for disassembling and assembling the universal tool, but not limited to the straight groove, and the seventh nut can be matched with the universal disassembling and assembling tool. Of course, the connection structure between the reverse unfolding flywheel 3041 and the corresponding reverse flywheel connecting portion 3023 is not limited to the seventh pin bolt 3043, and other connecting members, such as hinges, may be used to achieve the same effect.
In this embodiment, the fourth torsion spring 3042 is disposed on the corresponding reverse flywheel connecting portion 3023 via an eighth pin bolt 3044. The eighth pin roll screw 3044 includes an eighth nut, an eighth optical axis segment, and an eighth thread segment that are sequentially connected from top to bottom, and a sixteenth thread hole 30232 is formed in the reverse flywheel connecting portion 3023 at a position corresponding to the rotation position of the fourth torsion spring 3042; the eighth threaded section is threadedly connected in the sixteenth threaded hole 30232, and the fourth torsion spring 3042 is sleeved on the eighth optical axis section. The eighth nut is configured to limit the fourth torsion spring 3042 from moving along the length direction of the eighth pin bolt 3044, and preferably, an insertion groove capable of inserting the fourth torsion spring 3042 is formed on the eighth optical axis section to further limit the fourth torsion spring 3042 from moving. Further preferably, the eighth nut is provided with a straight groove for use in disassembling and assembling a general tool, but not limited to the straight groove, and the straight groove can be matched with the general disassembling and assembling tool. Of course, the connection structure between the fourth torsion spring 3042 and the corresponding reverse flywheel connecting portion 3023 is not limited to the eighth pin bolt 3044, and other connecting members, such as a fixed shaft, may be used to achieve the same effect.
Preferably, the tail ends of first pawl 2033 and second pawl 3033 are both arc-shaped to reduce the impact of collision when forward flywheel disc 202 and reverse flywheel disc 302 switch the rotation direction.
In a preferred embodiment, the ball screw 10 is opened at both ends with screw stoppers 101 for preventing the ball screw 10 from being removed from the screw nut assembly. Further, one or both of the two screw limiters 101 is/are provided with a force transmission connection, not shown. Wherein the force transmission connector is fixedly connected to the screw rod limiting part 101 by a thread. Specifically, the screw restricting member 101 may be a restricting disc fixedly attached to the end of the ball screw 10 by a screw, and a minimum diameter of the restricting disc is larger than a maximum diameter of the ball screw 10, thereby achieving an effect of preventing the ball screw 10 from coming out of the screw nut assembly.
In this embodiment, the housing includes a shell 801, and a cover 802 is screwed on the shell 801; the thrust bearing 50 is rotatably connected to the housing 801 and/or the cover 802, one end of the ball screw 10 is located outside one end of the housing 801, and the other end of the ball screw 10 passes through the cover 802, the accommodating cavity 804 and the housing 801 and then is located outside the other end of the housing 801; a cover 803 capable of covering an end of the ball screw 10 is provided on the other side of the housing 801 opposite to the cover 802 so that the cover 803 and the screw stopper 102 cooperate to restrict the stroke of the ball screw 10. Preferably, a spacing shaft section, not shown, is provided between the housing 801 and the cover 802 for adjusting the distance between the housing 801 and the cover 802.
In this embodiment, forward and reverse deployment mechanisms 304 need to provide a large portion of their rotational inertia as well as variable inertia, while forward and reverse flywheel discs 202 and 302 need to provide a small portion of their rotational inertia, thereby increasing the overall amount of variation in rotational inertia. Therefore, the forward unfolding flywheel 2041 and the reverse unfolding flywheel 3041 are made of iron-based materials including carbon steel materials and stainless steel materials, and other components including the forward flywheel disc 202, the reverse flywheel disc 302, the lead screw and nut assembly, the forward thumb wheel 201, the reverse thumb wheel 202, the housing 801, the cover 802, the cover 803 and the spacing shaft section 804 are made of light metal materials including 6061 alloy and hard aluminum.
The embodiment also discloses an assembly method of the inertia mass coefficient variable bidirectional rotation ratchet type ball screw inertia container, which specifically comprises the following steps:
step 1, according to the shape of the first ratchet groove 2031, a plurality of first pawls 2033 and a plurality of first torsion springs 2034 are mounted on the first pin shaft screw 601 and the second pin shaft screw 602, and the first pin shaft screw 601 and the second pin shaft screw 602 are mounted in the first pawl groove 2032 by means of a tool; according to the recessed shape of the second ratchet groove 3031, a plurality of second pawls 3033 and a plurality of third torsion springs 3034 are mounted on the fifth and sixth pin screws 603 and 604, and the fifth and sixth pin screws 603 and 604 are mounted in the second pawl groove 3032 by means of a tool.
Step 2, embedding the first pawl 2033 in the first ratchet groove 2031, covering the first flywheel anti-flying gland 205, and screwing the first flat-head socket cap screw 701 by means of a tool, so that the first flywheel anti-flying gland 205 is tightly connected with the forward flywheel disc 202; the second pawl 3033 is embedded in the second ratchet groove 3031, the second flywheel anti-flying cover 305 is covered, and the second flat-head inner hexagon screw 702 is screwed in by means of a tool, so that the second flywheel anti-flying cover 305 is tightly connected with the reverse flywheel disc 302.
Step 3, the second torsion spring 2042 and the fourth torsion spring 3042 are sleeved on the fourth pin shaft screw 2044 and the eighth pin shaft screw 3044, and the fourth pin shaft screw 2044, the second torsion spring 2042, the eighth pin shaft screw 3044 and the fourth torsion spring 3042 are installed on the forward flywheel disc 202 and the reverse flywheel disc 302 through threaded connection by means of a disassembling tool.
And 4, inserting a third pin shaft screw 2043 and a seventh pin shaft screw 3043 into the third through hole 20411 and the fourth through hole 30411, and connecting the third pin shaft screw 2043, the forward-direction unfolding flywheel 2041, the seventh pin shaft screw 3043 and the reverse-direction unfolding flywheel 3041 through threads by means of a dismounting tool to be installed on the forward-direction flywheel disc 202 and the reverse-direction flywheel disc 302.
And 5, completing the connection of the ball screw 10 and the first screw flange nut 401.
And 6, finishing the fixed connection of the first lead screw flange nut 401 and the forward thumb wheel 201.
And 7, completing the matching of the first lead screw flange nut 401 and the thrust bearing 50.
Step 8, repeating the step 5 to the step 7, completing the connection of the second screw flange nut 402 with the ball screw 10, the reverse thumb wheel 301 and the thrust bearing 50, and completing the assembly of the rotating part of the inertial container;
and 9, assembling the rotating part of the inertial container on the shell.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (8)

1. The ratchet type ball screw inerter with the variable inerter coefficient and the bidirectional rotation is characterized by comprising a shell, a ball screw and at least one group of flywheel devices, wherein a containing cavity is formed in the shell, and the flywheel devices are rotatably connected to the ball screw and located in the containing cavity;
the flywheel device comprises a lead screw nut component, at least one forward flywheel component and at least one reverse flywheel component, wherein the lead screw nut component is in threaded fit with a ball screw to form a ball screw pair;
The forward flywheel component comprises a forward shifting wheel, a forward flywheel disc, a forward pawl mechanism and a forward unfolding mechanism, the forward shifting wheel is fixedly sleeved on the screw nut component, the forward flywheel disc is sleeved on the forward shifting wheel and matched with the forward shifting wheel through the forward pawl mechanism to form a first ratchet structure, and the forward unfolding mechanism is arranged on the forward flywheel disc and used for adaptively changing the turning radius of the forward flywheel disc in the rotation process of the forward flywheel disc;
the reverse flywheel component comprises a reverse thumb wheel, a reverse flywheel disc, a reverse pawl mechanism and a reverse unfolding mechanism, the reverse thumb wheel is fixedly sleeved on the screw nut component, the reverse flywheel disc is sleeved on the reverse thumb wheel and matched with the reverse thumb wheel through the reverse pawl mechanism to form a second ratchet wheel structure, and the reverse unfolding mechanism is arranged on the reverse flywheel disc and used for adaptively changing the turning radius of the reverse flywheel disc in the rotation process of the reverse flywheel disc;
the forward flywheel disc and the reverse flywheel disc are opposite in rotating direction, and the mass and the rotational inertia of the forward flywheel assembly and the reverse flywheel assembly are equal;
in the same group of flywheel devices, the number of the forward flywheel assemblies is equal to that of the reverse flywheel assemblies;
The forward thumb wheel and the forward flywheel disc are both of circular ring structures, and the forward pawl mechanism comprises a first ratchet groove, a first pawl and a first torsion spring;
the first ratchet wheel groove is formed in one of the edge of the outer ring of the forward thumb wheel and the edge of the inner ring of the forward flywheel disc, the first pawl groove is formed in the other of the edge of the outer ring of the forward thumb wheel and the edge of the inner ring of the forward flywheel disc, the tail end of the first pawl is rotatably connected into the first pawl groove, the head end of the first pawl is in contact fit with the first ratchet wheel groove, and the first pawl only has a stroke moving along one direction of the first ratchet wheel groove;
the first torsion spring is arranged in the first pawl groove and adjacent to the first pawl, one end of the first torsion spring is abutted against the first pawl, and the other end of the first torsion spring is abutted against the groove wall of the first pawl groove, so that the head end of the first pawl is constantly contacted with the groove wall of the first ratchet groove under the action of the pretightening force of the first torsion spring;
the reverse thumb wheel and the reverse flywheel disc are both of circular ring structures, and the reverse pawl mechanism comprises a second ratchet groove, a second pawl and a third torsion spring;
The second ratchet wheel groove is formed in one of the outer ring edge of the reverse thumb wheel and the inner ring edge of the reverse flywheel disc, the second pawl groove is formed in the other of the outer ring edge of the reverse thumb wheel and the inner ring edge of the reverse flywheel disc, the tail end of the second pawl is rotatably connected into the second pawl groove, the head end of the second pawl is in contact fit with the second ratchet wheel groove, and the second pawl only has a stroke moving in one direction of the second ratchet wheel groove;
the third torsion spring is arranged in the second pawl groove and adjacent to the second pawl, one end of the third torsion spring is abutted against the second pawl, and the other end of the third torsion spring is abutted against the groove wall of the second pawl groove, so that the head end of the second pawl is constantly contacted with the groove wall of the second ratchet groove under the action of the pretightening force of the third torsion spring.
2. The inerter-spring-type container with the variable inerter coefficient and the bidirectional rotating ratchet wheel type ball screw according to claim 1, wherein the forward flywheel assembly further comprises a first flywheel anti-flying cover, and the first flywheel anti-flying cover is fixedly arranged on the forward flywheel plate and covers a matching position between the first ratchet wheel groove and the first pawl.
3. The inerter-mass coefficient variable bidirectional rotary ratchet type ball screw inerter of claim 1 or 2, wherein the forward unfolding mechanism comprises a plurality of forward unfolding flywheels;
The edge position of the forward flywheel disc is provided with a plurality of forward flywheel connecting parts which are in one-to-one correspondence with the forward unfolding flywheels at intervals along the circumferential direction of the forward flywheel disc;
the head end of the forward unfolding flywheel is rotatably connected to a position, close to the head end, on the corresponding forward flywheel connecting part;
the tail end of the forward unfolding flywheel has a stroke close to or far away from the tail end of the corresponding forward flywheel connecting part in the rotating process of the forward unfolding flywheel, and therefore the continuous variable turning radius of the forward flywheel disc is achieved.
4. The inerter-spring inerter with variable inerter coefficient and bidirectional rotation ratchet type ball screw of claim 3, wherein a second torsion spring is arranged on the forward flywheel connecting part near the head end of the forward flywheel connecting part, one end of the second torsion spring abuts against the head end of the corresponding forward flywheel connecting part, the other end abuts against the head end of the corresponding forward unfolding flywheel, and the second torsion spring has pre-tightening force;
when the forward flywheel disc is in a standing state, under the action of the pre-tightening force of the second torsion spring, the tail end of the forward unfolding flywheel is in a state closest to the tail end of the corresponding forward flywheel connecting part;
when the rotating speed of the forward flywheel discs is gradually increased and the rotating centrifugal force is larger than the pretightening force of the second torsion spring, the tail end of each forward unfolding flywheel is gradually far away from the tail end of the corresponding forward flywheel connecting part.
5. The inerter-spring-driven container with variable inerter coefficient and bi-directional rotation ratchet type ball screw according to claim 1 or 2, wherein the reverse flywheel assembly further comprises a second flywheel anti-flying cover, and the second flywheel anti-flying cover is fixedly arranged on the reverse flywheel disc and covers the matching position between the second ratchet groove and the second pawl.
6. The inerter-mass coefficient variable bidirectional rotary ratchet type ball screw inerter of claim 1 or 2, wherein the reverse expansion mechanism comprises a plurality of reverse expansion flywheels;
the edge position of the reverse flywheel disc is provided with a plurality of reverse flywheel connecting parts which are in one-to-one correspondence with the reverse unfolded flywheels at intervals along the circumferential direction of the reverse flywheel disc;
the head end of the reverse unfolding flywheel is rotatably connected to the position, close to the head end, of the corresponding reverse flywheel connecting part;
the tail end of the reversely unfolded flywheel has a stroke close to or far away from the tail end of the corresponding reverse flywheel connecting part in the rotating process of the reversely unfolded flywheel, so that the continuous variable turning radius of the reverse flywheel disc is realized.
7. The inerter-spring inerter with variable inerter coefficient and bidirectional rotation ratchet type ball screw of claim 6, wherein a fourth torsion spring is disposed on the reverse flywheel connecting portion near the head end thereof, one end of the fourth torsion spring abuts against the head end of the corresponding reverse flywheel connecting portion, the other end abuts against the head end of the corresponding reverse unfolding flywheel, and the fourth torsion spring has a pre-tightening force;
When the reverse flywheel disc is in a standing state, under the action of the pre-tightening force of the fourth torsion spring, the tail end of the reverse unfolding flywheel is in a state closest to the tail end of the corresponding reverse flywheel connecting part;
when the rotating speed of the reverse flywheel discs is gradually increased and the rotating centrifugal force is larger than the pretightening force of the fourth torsion spring, the tail end of each reverse unfolding flywheel is gradually far away from the tail end of the corresponding reverse flywheel connecting part.
8. The inerter-mass-coefficient-variable bidirectional-rotation ratchet type ball screw inerter of claim 1 or 2, wherein the screw nut assembly comprises a first screw flange nut and a second screw flange nut, the forward flywheel assembly is arranged on the first screw flange nut, and the reverse flywheel assembly is arranged on the second screw flange nut;
the first screw flange nut comprises a first nut part in threaded fit with the ball screw and a first flange part fixedly arranged on the first nut part, and the second screw flange nut comprises a second nut part in threaded fit with the ball screw and a second flange part fixedly arranged on the second nut part;
the forward shifting wheel is sleeved on the first nut portion and fixedly connected with the first flange portion, and the reverse shifting wheel is sleeved on the second nut portion and fixedly connected with the second flange portion.
CN202011540827.3A 2020-12-23 2020-12-23 Ratchet type ball screw inerter with variable inerter coefficient and capable of rotating bidirectionally Active CN112709785B (en)

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CN108397490B (en) * 2018-03-05 2023-09-01 中国重汽集团济南动力有限公司 Winch clutch separation preventing device
CN113464609B (en) * 2021-06-03 2022-10-28 江苏大学 Anti-impact inertial container based on coaxial series connection of flywheel and spring

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CN2895865Y (en) * 2006-03-30 2007-05-02 朱右伯 Improved structure of telecontrolled vehicle clutch piece
CN103438153A (en) * 2013-08-02 2013-12-11 浙江吉利汽车研究院有限公司 Variable inertia flywheel structure
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