CN102678810A

CN102678810A - High/low speed bidirectional damping adjustable mechanical damper

Info

Publication number: CN102678810A
Application number: CN2012101791595A
Authority: CN
Inventors: 李静; 韩佐悦; 程超; 黄剑锋
Original assignee: Jilin University
Current assignee: Jilin University
Priority date: 2012-06-01
Filing date: 2012-06-01
Publication date: 2012-09-19
Anticipated expiration: 2032-06-01
Also published as: CN102678810B

Abstract

The invention discloses a high/low speed bidirectional damping adjustable mechanical damper which comprises an original damper piston upper stroke limiting block, an original damper piston assembly, an oil storage cylinder, a middle cylinder, a piston cylinder, a bypass valve body, a piston cylinder bottom valve assembly, a damper lower fixing lug assembly, an stretch bypass valve and a compression bypass valve, wherein the original damper piston upper stroke limiting block is arranged at the upper ends of the oil storage cylinder and the piston cylinder and is mounted at the upper end of the middle cylinder through a middle cylinder fixing ring, a piston body and a piston rod of the original damper piston assembly and the piston cylinder are in sliding connection with the original damper piston upper stroke limiting block, the bypass valve body is sleeved on the lower end of the piston cylinder, the lower ends of the oil storage cylinder and the middle cylinder are fixedly connected with the upper end of the bypass valve body, the piston cylinder bottom valve assembly is fixedly connected with the lower end of the piston cylinder, the damper lower fixing lug assembly is welded and fixed to the lower end of the bypass valve body through an oil storage cylinder lower end cover in the damper lower fixing lug assembly, and the stretch bypass valve and the compression bypass valve are arranged in the bypass valve body and are in threaded connection.

Description

The adjustable mechanical vibration reducing device of high low speed bidirectional damper

Technical field

The present invention relates to a kind of Adjustable Damping mechanical vibration reducing device that is applied on the commercial car, more particularly, the present invention relates to a kind of adjustable mechanical vibration reducing device of high low speed bidirectional damper that is applied on the commercial car suspension.

Background technique

The suspension system of vehicle is responsible for relaxing road shocks and decay body vibrations, and suspension generally partly is made up of guide mechanism, elastic element, vibration damper etc.Wherein vibration damper is responsible for consuming vibrational energy, the attenuation vibration amplitude.For the mechanical vibration reducing device; When vehicle runs into Uneven road; Suspension moves up and down, the to-and-fro motion in piston cylinder of the piston of vibration damper, and the flow of liquid in each chamber is crossed valve system and the normal open hole in the vibration damper; Because the throttling action of the viscosity of liquid and aperture produces damping force, the energy of the friction dissipates vibration through liquid.The parameter of describing the vibration damper performance mainly is " power-speed " characteristic (damping characteristic) curve of vibration damper.The abscissa of plotted curve is the travelling speed of damper piston, and y coordinate is the damping force of vibration damper, and the slope of certain point is the damping constant of vibration damper under this speed on the curve.

Riding comfort and the vehicle handling and stability of vehicle in order to satisfy the occupant; The damping of vehicle suspension is chosen; The natural frequency of Vehicular vibration is tried one's best away from the resonant frequency of human body, and can make vibration acceleration, dynamic wheel load, the suspension dynamic deflection of vehicle as far as possible little.But these indexs receive the common influence of external factor such as car load, the speed of a motor vehicle, road conditions simultaneously.For the passive suspension that the non-adjustable traditional vibration damper of damping is installed, when external environmental factors such as car load, road conditions change, the performance of vehicle will produce great variety.Especially for the commercial car that is contained in goods, car load can in very large range produce fluctuation, and also difference is very big for the requirement of resistance of shock absorber coefficient for vehicle under each operating mode.Therefore adjustable-damping shock absorber is installed has very important meaning for commercial car.

Both at home and abroad adjustable-damping shock absorber has been carried out long term studies and developed polytype ride control shock absorber.Wherein, Adjustable Damping mechanical vibration reducing device is because need not extra power, and is stable and reliable for performance, and is widely used.But, the very difficult low speed of accomplishing in stretching and compression stroke and high speed difference independent regulation resistance of shock absorber coefficient of existing damp adjustable mechanical damper.

Through the Searches of Patent Literature, for example, Chinese patent notification number CN201068948Y; Day for announcing 2008.06.04, application number 200720094130.1, applying date 2007.05.26; Claimant Jilin University, name is called " ride control shock absorber ", the described ride control shock absorber of the technological scheme of this application; Though can regulate the damping force of vibration damper through the bypass valve of vibration damper,, can't regulate separately to the low speed and the high-speed working condition of vibration damper owing to have only one group of controlling device; And adjustment process influences the stretching travel damping force and the compression stroke damping force of vibration damper simultaneously, can't accomplish independent free adjusting, is difficult to accurately obtain desirable resistance of shock absorber characteristic.

Summary of the invention

Technical problem to be solved by this invention is to have overcome the problem that existing technology exists, and provides a kind of high low speed bidirectional damper adjustable mechanical vibration reducing device.

For solving the problems of the technologies described above, the present invention adopts following technological scheme to realize: the adjustable mechanical vibration reducing device of described high low speed bidirectional damper comprises under former damper piston up stroke limiting stopper, middle cylinder retaining ring, former damper piston assembly, oil storage cylinder, middle cylinder, piston cylinder, by-pass valve body, piston cylinder bottom valve assembly, the vibration damper fixedly ear assembly, stretching bypass valve and compression bypass valve.

Former damper piston up stroke limiting stopper is sleeved in the former damper piston assembly to become to be slidingly matched on the piston rod; Former damper piston up stroke limiting stopper is connected with the upper-end surface and the inner cylindrical surface contact of oil storage cylinder upper end inner chamber; The intermediate section of former damper piston up stroke limiting stopper and the central through bore Spielpassung of middle cylinder retaining ring; The lower end of middle cylinder retaining ring is inserted and is become contact to connect in the endoporus on the middle cylinder that is positioned at the oil storage cylinder inner chamber; The lower end of former damper piston up stroke limiting stopper is inserted and is become contact to connect in the endoporus on the piston cylinder that is positioned at the middle cylinder inner chamber; The piston body in the former damper piston assembly and the endoporus of piston cylinder are slidingly connected; The lower end that by-pass valve body is sleeved on piston cylinder becomes transition fit; The lower end of oil storage cylinder is sleeved on the dome ring body of by-pass valve body upper end; Adopt welding manner to fix between oil storage cylinder and the by-pass valve body, the lower end of middle cylinder is inserted and is become transition fit to connect in the middle cylinder hole on the by-pass valve body, and the external cylindrical surface upper end of the piston cylinder bottom valve body in the piston cylinder bottom valve assembly is connected with the contact of piston cylinder lower end endoporus; Fixedly the following fixedly earhole of the upper end of the oil storage cylinder lower end cap of ear assembly through wherein and by-pass valve body lower end is equipped and adopt welding manner to fix under the vibration damper; The fixing rotational axis conllinear of the oil storage cylinder lower end cap in the ear assembly under former damper piston up stroke limiting stopper, oil storage cylinder, middle cylinder retaining ring, middle cylinder, piston cylinder, former damper piston assembly, piston cylinder bottom valve assembly and the vibration damper, stretching bypass valve are packed in the stretching bypass valve chamber on the by-pass valve body and through being threaded, and the compression bypass valve is packed in the compression bypass valve chamber on the by-pass valve body and through being threaded.

By-pass valve body described in the technological scheme is the housing class formation spare that the cuboid by the cylindrical body in left side and right side links into an integrated entity; Be processed with ladder hole from top to bottom vertically on the cylindrical central axis in left side; First section for installing the middle cylinder hole of middle cylinder, and cylindrical upper end be the dome ring body that is equipped with oil storage cylinder with middle cylinder hole coaxial line.Second section is the piston cylinder lumen pore.The 3rd sector hole and the 5th sector hole are upper piston cylinder hole and the lower piston cylinder hole that is used for the piston cylinder of the equipped adjustable mechanical vibration reducing device of high low speed bidirectional damper.The 4th sector hole is called as the compression valve piston cylinder lumen pore that forms compression valve piston cylinder communicated cavity with piston cylinder.The 6th sector hole is to be communicated with lumen pore with the compression valve oil storage cylinder of piston cylinder formation compression valve oil storage cylinder communicated cavity.The 7th sector hole is called fixedly earhole.The 8th sector hole is called down fixedly earhole.Stretching bypass valve chamber that is processed with circle hole shape on the cuboid of by-pass valve body right side and compression bypass valve chamber, stretching bypass valve chamber and the rotational axis of compression bypass valve chamber are vertical with cylindrical body central axis on the left of the by-pass valve body and be in the same vertical plane.The right side of stretching bypass valve chamber and compression bypass valve chamber is provided with the quick closing valve housing seal circle that stretches and contacts the cylndrical surface that seals with compression quick closing valve housing seal circle.Stretching bypass valve chamber is processed with the internal thread that is used to be connected stretching valve quick closing valve housing and compression valve quick closing valve housing with the neutral position of compression bypass valve chamber; Be processed with the stretching valve middle cylinder intercommunicating pore of coaxial line on the left side of stretching bypass valve chamber, be processed with the compression valve piston cylinder intercommunicating pore of coaxial line on the left side of compression bypass valve chamber.The periphery of by-pass valve body left side semicylinder is evenly equipped with seven axial oil storage cylinder intercommunicating pores that are communicated with compression valve oil storage cylinder communicated cavity.The periphery of the semicylinder that is connected with the cuboid left side in the by-pass valve body is processed with 1 axial stretching valve oil storage cylinder intercommunicating pore that is communicated with stretching bypass valve chamber; Stretching bypass valve described in the technological scheme is identical with the structure of compression bypass valve.Described stretching bypass valve comprises stretching valve high speed valve body, stretching valve quick closing valve spring, stretching valve quick closing valve housing, stretching quick closing valve housing seal circle, stretching low speed valve body sealing ring, stretching valve low speed valve body, stretching low speed needle seal ring and stretching valve low speed needle.Stretching quick closing valve housing seal circle is packed in the quick closing valve housing seal circle fixed groove on the stretching valve quick closing valve housing; Stretching valve low speed valve body is packed in the stretching valve quick closing valve housing and through being threaded; Stretching low speed valve body sealing ring is packed in the low speed valve body sealing ring fixed groove on the stretching valve low speed valve body; Stretching valve low speed valve body left end is set with stretching valve quick closing valve spring; Stretching valve quick closing valve spring) left end is sleeved on the cirque body of stretching valve high speed valve body right-hand member; The left side contact of the left side of stretching valve high speed valve body and stretching valve quick closing valve housing inner chamber is connected, and stretching valve low speed needle is packed in the stretching valve low speed valve body and employing is threaded, and stretching low speed needle seal ring is packed in the low speed needle seal ring fixed groove on the stretching valve low speed needle; Stretching valve quick closing valve housing described in the technological scheme is a cylinder class formation spare.The stage casing of the outer surface of stretching valve quick closing valve housing is processed with quick closing valve housing screw thread; Stretching valve quick closing valve housing low order end is the quick closing valve housing spanner that the annular knurl decorative pattern is set; Be processed with the quick closing valve housing seal circle fixed groove that is used to install stretching quick closing valve housing seal circle on quick closing valve housing screw thread on the stretching valve quick closing valve housing and the external cylindrical surface between the quick closing valve housing spanner; The high order end center of stretching valve quick closing valve housing is processed with the bypass valve ostium; Be processed with high speed valve pocket coaxial with the bypass valve ostium and that be communicated with in the stretching valve quick closing valve housing; The right side of the inner cylindrical surface of high speed valve pocket is provided with the internal thread with low speed valve body screw-thread fit; The internal thread right side is set to and the contacted circular unthreaded hole of the low speed valve body sealing ring that stretches, and the left position of quick closing valve housing screw thread is processed with four bypass valve tap holes that axis and the perpendicular circumferencial direction of stretching valve quick closing valve housing axis are uniformly distributed with; Stretching valve low speed valve body described in the technological scheme is a cylinder class formation spare.The high order end of stretching valve low speed valve body is processed with columniform quick closing valve directional post, and the right-hand member of quick closing valve directional post is the spring directional post, is processed with low speed valve body screw thread on the toric external cylindrical surface of spring directional post right-hand member.The low order end of stretching valve low speed valve body is processed with low speed valve body spanner four prism type or hexagon, on the external cylindrical surface between low speed valve body screw thread and the low speed valve body spanner, is processed with the low speed valve body sealing ring fixed groove that is used for fixing stretching low speed valve body sealing ring.The quick closing valve directional post is processed with the low speed valve ostium coaxial with the quick closing valve directional post along axis; The right-hand member of low speed valve ostium connects the small end of low speed valve damping taper hole; The big end of low speed valve damping taper hole is communicated with the low-speed needle valve chamber; The diameter in low-speed needle valve chamber equates with the Outside diameter of low speed valve damping taper hole; Left end in the low-speed needle valve chamber is processed with four low speed valve oil outlets that are uniformly distributed with at circumferencial direction of the axis normal of axis and stretching valve low speed valve body; The right-hand member in low-speed needle valve chamber is processed with internal thread, and the right-hand member in low-speed needle valve chamber is processed with the needle-valve closed hole, the rotational axis conllinear of low speed valve ostium, low speed valve damping taper hole, low-speed needle valve chamber, needle-valve closed hole and stretching valve low speed valve body; Stretching valve low speed needle described in the technological scheme is a bar class formation spare.The left end of stretching valve low speed needle is processed with the low speed valve damping cone; The cone-apex angle of the low speed valve damping taper hole on the cone-apex angle of low speed valve damping cone and the stretching valve low speed valve body is identical; The larger diameter end of low speed valve damping cone is less than the diameter in the low-speed needle valve chamber on the stretching valve low speed valve body; The larger diameter end of low speed valve damping cone is connected with the columniform low speed valve needle body that equates with low speed valve damping cone Outside diameter; The right-hand member of low speed valve needle body is provided with the screw rod that is processed with low speed needle screw thread; The diameter of screw rod that is processed with low speed needle screw thread is greater than the diameter of low speed valve needle body, and the right side of low speed needle screw thread is processed with low speed valve guide and limit ring, and the right side of low speed valve guide and limit ring is processed with the low speed needle seal ring fixed groove that is used to install stretching low speed needle seal ring; The right side of low speed needle seal ring fixed groove is provided with columniform low speed needle spanner, is processed with low speed needle U-groove bevel on the right side of low speed needle spanner.

Compared with prior art the invention has the beneficial effects as follows:

1. the adjustable mechanical vibration reducing device of high low speed bidirectional damper of the present invention can be realized vibration damper compression stroke, rebound resistance independent regulation respectively; And damping force independent regulation under high speed and the low speed; Thereby can obtain damping characteristic required under the different operating modes, improve the performance of vehicle to greatest extent.

2. the adjustable mechanical vibration reducing device of high low speed bidirectional damper of the present invention can be realized the continuous adjusting of the damping force of vibration damper compression stroke, extension stroke, high regime and low speed segment, makes vibration damper conveniently obtain desirable damping characteristic.

3. invent the adjustable mechanical vibration reducing device of described high low speed bidirectional damper and continue to use important spare parts such as piston assembly in the former commercial car vibration damper, piston cylinder bottom valve are total, oil storage cylinder; And on former vibration damper, add structures such as middle cylinder and bypass valve system; Boundary dimension changes very little and mounting type is constant, and little to former vibration damper change amount, cost is lower; Be easy to realize that renovation technique of the present invention is equally applicable to the transformation of other vibration dampers of the same type.

Description of drawings

Below in conjunction with accompanying drawing the present invention is further described:

Fig. 1 is that the adjustable mechanical vibration reducing device of high low speed bidirectional damper of the present invention structure is formed the whole-cutaway view on the plan view;

Fig. 2 is that the stretching bypass valve arrangement is formed the whole-cutaway view on the plan view in the adjustable mechanical vibration reducing device of high low speed bidirectional damper of the present invention;

Fig. 3 is that the compression bypass valve arrangement is formed the whole-cutaway view on the plan view in the adjustable mechanical vibration reducing device of high low speed bidirectional damper of the present invention;

Fig. 4 is that the former damper piston up stroke limiting stopper structure in the adjustable mechanical vibration reducing device of high low speed bidirectional damper of the present invention is formed the whole-cutaway view on the plan view;

Fig. 5 is that the middle cylinder retaining ring structure in the adjustable mechanical vibration reducing device of high low speed bidirectional damper of the present invention is formed the whole-cutaway view on the plan view;

Fig. 6 is that the former damper piston assembly structure in the adjustable mechanical vibration reducing device of high low speed bidirectional damper of the present invention is formed the whole-cutaway view on the plan view;

Fig. 7 is that the oil storage cylinder structure in the adjustable mechanical vibration reducing device of high low speed bidirectional damper of the present invention is formed the whole-cutaway view on the plan view;

Fig. 8 is that the middle cylinder structure in the adjustable mechanical vibration reducing device of high low speed bidirectional damper of the present invention is formed the whole-cutaway view on the plan view;

Fig. 9 is that the piston cylinder structure in the adjustable mechanical vibration reducing device of high low speed bidirectional damper of the present invention is formed the whole-cutaway view on the plan view;

Figure 10-a is that the by-pass valve body structure in the adjustable mechanical vibration reducing device of high low speed bidirectional damper of the present invention is formed the whole-cutaway view on the plan view;

Figure 10-b is the plan view that the by-pass valve body structure in the adjustable mechanical vibration reducing device of high low speed bidirectional damper of the present invention is formed;

Figure 11 is that stretching valve high speed valve body and the compression valve quick closing valve body structure in the adjustable mechanical vibration reducing device of high low speed bidirectional damper of the present invention formed the whole-cutaway view on the plan view;

Figure 12 is that stretching valve quick closing valve housing and the compression valve quick closing valve shell construction in the adjustable mechanical vibration reducing device of high low speed bidirectional damper of the present invention formed the whole-cutaway view on the plan view;

Figure 13 is that stretching valve low speed valve body and the compression valve low speed valve body structure in the adjustable mechanical vibration reducing device of high low speed bidirectional damper of the present invention formed the whole-cutaway view on the plan view;

Figure 14 is stretching valve low speed needle and the plan view of compression valve low speed needle in the adjustable mechanical vibration reducing device of high low speed bidirectional damper of the present invention;

Figure 15 is that the total adult structure of the piston cylinder bottom valve in the adjustable mechanical vibration reducing device of high low speed bidirectional damper of the present invention is formed the whole-cutaway view on the plan view;

Figure 16 be under the vibration damper in the adjustable mechanical vibration reducing device of high low speed bidirectional damper of the present invention fixedly the ear assembly structure form the whole-cutaway view on the plan view;

Figure 17 " power-speed " characteristic that is the adjustable mechanical vibration reducing device of high low speed bidirectional damper of the present invention when regulating stretching valve low speed valve aperture under the stretching travel low speed;

Figure 18 is the adjustable mechanical vibration reducing device of high low speed bidirectional damper of the present invention following at a high speed " power-speed " characteristic of stretching travel when regulating stretching valve quick closing valve pretension;

Figure 19 " power-speed " characteristic that is the adjustable mechanical vibration reducing device of high low speed bidirectional damper of the present invention when regulating compression valve low speed valve aperture under the compression stroke low speed;

Figure 20 is following at a high speed " power-speed " characteristic of the adjustable mechanical vibration reducing device of high low speed bidirectional damper of the present invention compression stroke when regulating compression valve quick closing valve pretension;

Figure 21 is the maximal regulated scope of the adjustable mechanical vibration reducing device of high low speed bidirectional damper of the present invention " power-speed " characteristic.

Among the figure: 1. former damper piston up stroke limiting stopper, 2. middle cylinder retaining ring, 3. former damper piston assembly, 4. oil storage cylinder, 5. middle cylinder; 6. piston cylinder, 7. by-pass valve body, 8. stretching valve high speed valve body, 9. stretching valve quick closing valve spring, 10 stretching valve quick closing valve housings; 11. stretching quick closing valve housing seal circle, 12. stretching low speed valve body sealing rings, 13. stretching valve low speed valve bodies, 14. stretching low speed needle seal rings, 15. stretching valve low speed needles; 16. compression valve quick closing valve housing, 17. compression valve low speed valve bodies, 18. compression valve low speed needles, 19. compression valve quick closing valve springs, 20. compression valve high speed valve bodies; 21. piston cylinder bottom valve assembly, fixing ear assembly under 22. vibration dampers, 23. spill ports, 24. dunnages, 25. spring valve plates; 26. back oil road, 27. stretching openings, 28. compressive flow through holes, 29. oil storage cylinder intercommunicating pores, 30; Stretching valve oil storage cylinder intercommunicating pore, 31. stretching valve middle cylinder intercommunicating pores, 32. stretching bypass valve chambers, 33. compression bypass valve chambers, 34. compression valve piston cylinder intercommunicating pores; 35. compression valve piston cylinder communicated cavity, 36. compression valve oil storage cylinder communicated cavitys, 37. low speed valve body openings, 38. quick closing valve damping holes, 39. bypass valve ostiums; 40. the high speed valve pocket, 41. bypass valve tap holes, 42. quick closing valve housing screw threads, 43. quick closing valve housing seal circle fixed grooves, 44. quick closing valve housing spanners; 45. the low speed valve ostium, 46. quick closing valve directional posts, 47. low speed valve damping taper holes, 48. low speed valve oil outlets; 49. low speed valve body screw thread, 50. low speed valve body sealing ring fixed grooves, 51. needle-valve closed holes, 52. spring directional posts, 53. low speed valve body spanners; 54. the low speed valve damping cone, 55. low speed needle screw threads, 56. low speed valve guide and limit rings, 57. low speed needle seal ring fixed grooves, 58. low speed needle spanners; 59. low speed needle U-groove bevel, 60. oil storage cylinder lower end caps, 61. vibration damper lower fixed holes, 62. low-speed needle valve chambeies, 63. low speed valve needle bodies; 64. piston cylinder bottom valve body, 65. upper piston chambeies, 66. intermediate cavity, shoe cream room on 67., 68. lower piston chambeies; 69. following shoe cream room, 70. pistons circulation valve spring, 71. shock absorber oils, 72. piston rods, 73. piston bodies; 74. recuperation valve spring at the bottom of the piston cylinder, compensation valve block at the bottom of 75. piston cylinders, 76. piston cylinder base compression valve blocks, 77. stretching bypass valve; 78. the compression bypass valve, 79. compression quick closing valve housing seal circles, 80. compression low speed valve body sealing rings, 81. compression low speed needle seal rings; 82. annular end face on the limiting stopper, 83. limiting stopper intermediate annular end faces, annular end face on 84. retaining rings, 85. retaining ring intermediate annular end faces.

Embodiment

Below in conjunction with accompanying drawing the present invention is explained in detail:

Consult Fig. 1, the adjustable mechanical vibration reducing device of high low speed bidirectional damper of the present invention comprises under former damper piston up stroke limiting stopper 1, middle cylinder retaining ring 2, former damper piston assembly 3, oil storage cylinder 4, middle cylinder 5, piston cylinder 6, by-pass valve body 7, stretching bypass valve 77, compression bypass valve 78, piston cylinder bottom valve assembly 21 and the vibration damper fixedly ear assembly 22; Wherein: stretching bypass valve 77 is identical with compression bypass valve 78 structures.

Former damper piston up stroke limiting stopper 1 is contained in the former damper piston assembly 3 to become to be slidingly matched on the piston rod 72 through its inner hole sleeve; The top end of former damper piston up stroke limiting stopper 1 and upper end external cylindrical surface contact with the end face and the inner cylindrical surface of former auto shock absorber 4 inner chambers upper end; The cylndrical surface of the intermediate section of former damper piston up stroke limiting stopper 1 is connected with the central through bore Spielpassung of middle cylinder retaining ring 2, on the limiting stopper of top, the intermediate section cylndrical surface of former damper piston up stroke limiting stopper 1 on the retaining ring of annular end face 82 and middle cylinder retaining ring 2 annular end face 84 contact.The lower end of middle cylinder retaining ring 2 inserts that contact connects in the endoporus of middle cylinder 5 upper ends that are positioned at oil storage cylinder 4 inner chambers, and annular end face contacts on the retaining ring intermediate annular end face 85 of middle cylinder retaining ring 2 and the middle cylinder of middle cylinder 5.The lower end of former damper piston up stroke limiting stopper 1 inserts that contact connects in the endoporus of piston cylinder 6 upper ends that are positioned at middle cylinder 5 inner chambers, and annular end face contacts with the limiting stopper intermediate annular end face 83 of former damper piston up stroke limiting stopper 1 on the piston cylinder of piston cylinder 6.Piston body 73 in the former damper piston assembly 3 is slidingly connected with the endoporus of piston cylinder 6, and promptly former damper piston assembly 3 can be free to slide in piston cylinder 6.The lower end that by-pass valve body 7 is sleeved on piston cylinder 6 is a transition fit, and the lower end of oil storage cylinder 4 is sleeved on the dome ring body of by-pass valve body 7 upper ends, adopts welding fixing between oil storage cylinder 4 and the by-pass valve body 7; Become interference fit to connect in the endoporus of the lower end insertion by-pass valve body 7 dome ring bodies of middle cylinder 5, the right-hand member of by-pass valve body 7 is communicated with lower piston chamber 68 with compression valve piston cylinder communicated cavity 35 and last shoe cream room 67, intermediate cavity 66 with compression valve piston cylinder intercommunicating pore 34 through stretching valve oil storage cylinder intercommunicating pore 30, stretching valve middle cylinder intercommunicating pore 31.The external cylindrical surface of the piston cylinder bottom valve body 64 in the piston cylinder bottom valve assembly 21 upper end contacts with piston cylinder 6 lower end endoporus and is connected, and the annular end face that size equates on piston cylinder 6 lower end surfaces and the piston cylinder bottom valve body 64 contacts.Piston cylinder 6 is clamped up and down by former damper piston up stroke limiting stopper 1 and piston cylinder bottom valve assembly 21.Fixedly the endoporus of the upper end of the oil storage cylinder lower end cap 60 of ear assembly 22 through wherein and by-pass valve body 7 lower ends is equipped and adopt welding manner to fix under the vibration damper, under the curved surface of piston cylinder bottom valve assembly 21 through piston cylinder bottom valve body 64 lower ends wherein and the vibration damper fixedly the negative camber of the oil storage cylinder lower end cap 60 in the ear assembly 22 contact and be connected.The fixing rotational axis conllinear of the oil storage cylinder lower end cap 60 in the ear assembly 22 under former damper piston up stroke limiting stopper 1, oil storage cylinder 4, middle cylinder retaining ring 2, middle cylinder 5, piston cylinder 6, former damper piston assembly 3, piston cylinder bottom valve assembly 21 and the vibration damper.Stretching bypass valve 77 is connected with stretching bypass valve chamber 32 on the by-pass valve body 7 through screw thread, compresses bypass valve 78 and passes through screw thread and be connected with compression bypass valve chamber 33 on the by-pass valve body 7.

Except in the last shoe cream room 67 certain volume gas being arranged, be used to absorb the volume of piston rod 72 in the adjustable mechanical vibration reducing device of high low speed bidirectional damper of the present invention, its complementary space all is full of shock absorber oil 71.

Consult Fig. 2, stretching bypass valve 77 comprises stretching valve high speed valve body 8, stretching valve quick closing valve spring 9, stretching valve quick closing valve housing 10, stretching quick closing valve housing seal circle 11, stretching low speed valve body sealing ring 12, stretching valve low speed valve body 13, stretching low speed needle seal ring 14 and stretching valve low speed needle 15.

Stretching valve quick closing valve housing 10 is connected with stretching bypass valve chamber 32 on the by-pass valve body 7 through screw thread, and stretching quick closing valve housing seal circle 11 is packed in the quick closing valve housing seal circle fixed groove 43 on the stretching valve quick closing valve housing 10.Stretching valve low speed valve body 13 and stretching valve quick closing valve housing 10 be through being threaded, and stretching low speed valve body sealing ring 12 is packed in the low speed valve body sealing ring fixed groove 50 on the stretching valve low speed valve body 13.Stretching valve low speed valve body 13 left ends are set with stretching valve quick closing valve spring 9, and the left end of stretching valve quick closing valve spring 9 is sleeved on the cirque body of stretching valve high speed valve body 8 right-hand members, stretching valve high speed valve body 8 is pressed on the left side of stretching valve quick closing valve housing 10 inner chambers.Stretching valve low speed needle 15 and stretching valve low speed valve body 13 be through being threaded, and stretching low speed needle seal ring 14 is packed into and played the effect of sealing in the low speed needle seal ring fixed groove 57 on the stretching valve low speed needle 15.

Consult Fig. 3, compression bypass valve 78 comprises compression valve high speed valve body 20, compression valve quick closing valve spring 19, compression valve quick closing valve housing 16, compression quick closing valve housing seal circle 79, compression low speed valve body sealing ring 80, compression valve low speed valve body 17, compression low speed needle seal ring 81 and compression valve low speed needle 18.

Compression valve quick closing valve housing 16 is connected with compression bypass valve chamber 33 on the by-pass valve body 7 through screw thread, is equipped with between the two and compresses quick closing valve housing seal circle 79.Compression valve low speed valve body 17 and compression valve quick closing valve housing 16 are equipped with compression low speed valve body sealing ring 80 through being threaded between the two.Compression valve low speed valve body 17 left ends are set with compression valve quick closing valve spring 19, and the right-hand member of compression valve quick closing valve spring 19 left end suit compression valve high speed valve bodies 20 is pressed in compression valve high speed valve body 20 on the left side of compression valve quick closing valve housing 16 inner chambers.Compression valve low speed needle 18 and compression valve low speed valve body 17 are equipped with compression low speed needle seal ring 81 through being threaded between the two.

Consult Fig. 4, former damper piston up stroke limiting stopper 1 is parts in the former vibration damper.Former damper piston up stroke limiting stopper 1 is provided with back oil road 26; Back oil road 26 will be communicated with the external cylindrical surface of former damper piston up stroke limiting stopper 1 periphery along the inner cylindrical surface of the former damper piston up stroke limiting stopper 1 axial central through bore that is provided with; In the adjustable mechanical vibration reducing device of the high low speed bidirectional damper extension stroke; The fluid of piston rod surface is scraped at place, oil return road junction, and flows out through back oil road 26.

Consult Fig. 5, middle cylinder retaining ring 2 is an annulus class formation spare, and external cylindrical surface is stepped, middle cylinder retaining ring 2 upper ends radially be processed with four spill ports 23 that the structure that is uniformly distributed with is identical, the fluid through back oil road 26 flows out flows back to oil storage cylinder 4 through spill port 23.

Consult Fig. 6, former damper piston assembly 3 is parts in the former vibration damper, and wherein piston rod 72 1 ends are welded with dunnage 24 and are used to bear vibration damper load.Deformable spring valve plate 25 is installed in the structure of the other end, is processed with the normal open hole of several minor diameters on the spring valve plate 25.Spring valve plate 25 1 sides apply pretightening force by piston circulation valve spring 70 and are pressed on the piston body 73, are processed with the normal open hole on the piston body 73.

Consult Fig. 7; Oil storage cylinder 4 in the vibration damper is the structural member in the former commercial car vibration damper; Processed by seamless steel pipe, left end turns in suppressing, through the flat top surface and the fixing former damper piston up stroke limiting stopper 1 of steel pipe inner cylindrical surface of being inverted to form; Oil storage cylinder 4 the other ends are dressed up contact through end face and inner cylindrical surface and the dome ring body cover on the by-pass valve body 7 and are connected, and fixing through welding.

Consult Fig. 8, middle cylinder 5 is processed by seamless steel pipe.2 interference are connected middle cylinder 5 one ends with the middle cylinder retaining ring with inner cylindrical surface through end face.The endoporus of the other end through the dome ring body on end face and external cylindrical surface and the by-pass valve body 7 is fitted to interference and is connected.

Consult Fig. 9, piston cylinder 6 is processed by seamless steel pipe.Piston cylinder 6 one ends are connected with gap, cylndrical surface, former damper piston up stroke limiting stopper 1 lower end.The external cylindrical surface upper end of the piston cylinder bottom valve body 64 in the other end and the piston cylinder bottom valve assembly 21 is connected.Be connected the stretching opening 27 that an end is processed with 4 circumference uniform distributions with former damper piston up stroke limiting stopper 1, the other end is processed with the compressive flow through hole 28 of 6 circumference uniform distributions.

Consult Figure 10-a, by-pass valve body 7 is housing class formation spares that the cuboid by the cylindrical body in left side and right side links into an integrated entity.Be processed with coaxial ladder hole vertically from top to bottom on the cylindrical central axis in left side; First section is the middle cylinder hole; The middle cylinder hole is used for fixing the middle cylinder of installing in the adjustable mechanical vibration reducing device of high low speed bidirectional damper 5; Middle cylinder hole and middle cylinder 5 external cylindrical surfaces are transition fit; And having formed dome ring body (be cylindrical upper end for the dome ring body equipped of middle cylinder hole coaxial line) between the inner cylindrical surface in the external cylindrical surface of middle cylinder hole coaxial line and middle cylinder hole with oil storage cylinder 4, the lower end of dome ring body and oil storage cylinder 4 is equipped with.Second section is the piston cylinder lumen pore, forms the part of intermediate cavity 66 between piston cylinder lumen pore and the piston cylinder.The the 3rd and the 5th sector hole is used for the piston cylinder 6 of the equipped adjustable mechanical vibration reducing device of high low speed bidirectional damper; The the 3rd and the 5th sector hole is called as upper piston cylinder hole and lower piston cylinder hole; Upper piston cylinder hole is identical with lower piston cylinder bore dia, upper piston cylinder hole and lower piston cylinder hole and piston cylinder 6 external cylindrical surface Spielpassung.The 4th sector hole is called as compression valve piston cylinder lumen pore; Form compression valve piston cylinder communicated cavity 35 between compression valve piston cylinder lumen pore and the piston cylinder 6; Compression valve piston cylinder communicated cavity 35 has been communicated with the compression valve piston cylinder intercommunicating pore 34 on compressive flow through hole 28 and the by-pass valve body 7 on the piston cylinder 6, and the axial position of compression valve piston cylinder communicated cavity 35 aligns with compressive flow through hole 28 mutually.The compression valve oil storage cylinder that the 6th sector hole is with piston cylinder 6 forms compression valve oil storage cylinder communicated cavitys 36 is communicated with lumen pore, is used for compression bypass valve chamber 33, goes out oil cylinder intercommunicating pore 29 and be communicated with following shoe cream room 69.The 7th sector hole is called the fixedly earhole of going up that is used to locate under the vibration damper fixing ear assembly 22; The 8th sector hole is called and is used to connect under the vibration damper the fixedly following fixedly earhole of ear assembly 22; Promptly go up fixedly earhole with down fixedly earhole be used to install and fix under the vibration damper fixedly ear assembly 22, promptly go up fixedly the end toroidal surface of earhole and contact to be connected with the top anchor ring of oil storage cylinder lower end cap 60 and play the role of positioning; Fixedly the external cylindrical surface transition fit of earhole and oil storage cylinder lower end cap 60 plays interconnect function down, adopts welding manner further fixing between the external cylindrical surface of oil storage cylinder lower end cap 60 and by-pass valve body 7 bottom surfaces again.

Be processed with the stretching bypass valve chamber 32 and compression bypass valve chamber 33 of circle hole shape in the by-pass valve body 7 right side cuboids, the cylindrical body central axis in stretching bypass valve chamber 32 and the rotational axis that compresses bypass valve chamber 33 and by-pass valve body 7 left sides is vertical and be in the same vertical plane.Stretching bypass valve chamber 32 is provided with the cylndrical surface with the right side of compression bypass valve chamber 33, and the cylndrical surface contacts the effect of playing sealing fluid with stretching quick closing valve housing seal circle 11 with compression quick closing valve housing seal circle 79.The neutral position of stretching bypass valve chamber 32 and compression bypass valve chamber 33 is processed with screw thread respectively and is used to be connected stretching valve quick closing valve housing 10 and compression valve quick closing valve housing 16.Be processed with the stretching valve middle cylinder intercommunicating pore 31 of coaxial line on the left side of stretching bypass valve chamber 32, stretching valve middle cylinder intercommunicating pore 31 is connected with intermediate cavity 66.Be processed with the compression valve piston cylinder intercommunicating pore 34 of coaxial line on the left side of compression bypass valve chamber 33, compression valve piston cylinder intercommunicating pore 34 is communicated with compression valve piston cylinder communicated cavity 35.

Consult Figure 10-b; Cylindrical left side in the by-pass valve body 7 promptly is evenly equipped with seven axial oil storage cylinder intercommunicating pores 29 that are communicated with compression valve oil storage cylinder communicated cavity 36 away from the periphery of the semicylinder of cuboid one side, and oil storage cylinder intercommunicating pore 29 connects goes up shoe cream room 67 and compression valve oil storage cylinder communicated cavity 36.Cylindrical body in the by-pass valve body 7 is processed with 1 axial stretching valve oil storage cylinder intercommunicating pore 30 that is communicated with stretching bypass valve chamber 32 near the periphery of the semicylinder of cuboid one side, and stretching valve oil storage cylinder intercommunicating pore 30 connects goes up shoe cream room 67 and stretching bypass valve chamber 32.

Consult Figure 11, stretching valve high speed valve body 8 is identical with the structure of compression valve high speed valve body 20, is the disc-like structural member.Stretching valve high speed valve body 8 is processed with the low speed valve body opening 37 coaxial with external cylindrical surface with the center of compression valve high speed valve body 20, and the quick closing valve directional post 46 on low speed valve body opening 37 and stretching valve low speed valve body 13 and the compression valve low speed valve body 17 is slidingly matched.Stretching valve high speed valve body 8 is slidingly matched with the external cylindrical surface of compression valve high speed valve body 20 and high speed valve pocket 40 inner cylindrical surfaces of stretching valve quick closing valve housing 10 and compression valve quick closing valve housing 16.Be evenly equipped with 6 quick closing valve damping holes 38 on the annulus platform of stretching valve high speed valve body 8 and compression valve high speed valve body 20 peripheries.Fluid can produce damping force during through these damping holes.The end circular planes of annulus platform is as the supporting plane of stretching valve quick closing valve spring 9 with compression valve quick closing valve spring 19.

Consult Figure 12, stretching valve quick closing valve housing 10 is identical with compression valve quick closing valve housing 16 structures, is cylinder class formation spare.Stretching valve quick closing valve housing 10 is processed with quick closing valve housing screw thread 42 with the stage casing of the outer surface of compression valve quick closing valve housing 16, is used for being threaded fixing with by-pass valve body 7.Stretching valve quick closing valve housing 10 is set to quick closing valve housing spanner 44 with the external cylindrical surface of compression valve quick closing valve housing 16 low order ends, and external cylindrical surface is provided with the pattern structure of annular knurl, is convenient to circumgyration stretch valve quick closing valve housing 10 and compression valve quick closing valve housing 16 with it.Be processed with quick closing valve housing seal circle fixed groove 43 on quick closing valve housing screw thread 42 on stretching valve quick closing valve housing 10 and the compression valve quick closing valve housing 16 and the external cylindrical surface between the quick closing valve housing spanner 44, be used to install stretching quick closing valve housing seal circle 11 and compression quick closing valve housing seal circle 79.Stretching valve quick closing valve housing 10 is processed with bypass valve ostium 39 with the high order end center of compression valve quick closing valve housing 16.Be processed with high speed valve pocket 40 coaxial with bypass valve ostium 39 and that be communicated with in stretching valve quick closing valve housing 10 and the compression valve quick closing valve housing 16.Stretching valve quick closing valve housing 10 is slidingly matched with the inner cylindrical surface of the high speed valve pocket 40 of compression valve quick closing valve housing 16 and the external cylindrical surface of stretching valve high speed valve body 8 and compression valve high speed valve body 20, and the right side of high speed valve pocket 40 inner cylindrical surfaces is provided with the internal thread that cooperates with low speed valve body screw thread 49.The inner cylindrical surface of internal thread right side circular hole contacts with compression low speed valve body sealing ring 80 with stretching low speed valve body sealing ring 12, plays the effect of sealing fluid.The position of quick closing valve housing screw thread 42 left ends is processed with 41, four bypass valve tap holes 41 of four bypass valve tap holes that axis and the perpendicular circumferencial direction of stretching valve quick closing valve housing 10 axis be uniformly distributed with and is communicated with high speed valve pocket 40.

Consult Figure 13, stretching valve low speed valve body 13 is identical with compression valve low speed valve body 17 structures, is cylinder class formation spare.Stretching valve low speed valve body 13 is processed with columniform quick closing valve directional post 46 with the high order end of compression valve low speed valve body 17, and the low speed valve body opening 37 on quick closing valve directional post 46 and stretching valve high speed valve body 8 and the compression valve high speed valve body 20 is slidingly matched.Quick closing valve directional post 46 right-hand member annular end faces are confined planes that stretching valve high speed valve body 8 and compression valve high speed valve body 20 move.Confined planes promptly is the left side with the spring directional post 52 of quick closing valve directional post 46 coaxial lines; Stretching valve quick closing valve spring 9 is sleeved on the spring directional post 52 with compression valve quick closing valve spring 19, and the right-hand member toroidal surface of spring directional post 52 is as the supporting plane of stretching valve quick closing valve spring 9 with compression valve quick closing valve spring 19.Supporting plane promptly is the toric left side that links to each other with spring directional post 52 right-hand members; Be processed with low speed valve body screw thread 49 on the toric external cylindrical surface, stretching valve low speed valve body 13 is connected with compression valve quick closing valve housing 16 with stretching valve quick closing valve housing 10 through low speed valve body screw thread 49 with compression valve low speed valve body 17.Stretching valve low speed valve body 13 is processed with low speed valve body spanner 53 four prism type or hexagon with the low order end of compression valve low speed valve body 17; Utilize low speed valve body spanner 53 can circumgyration stretch valve low speed valve body 13 with compression valve low speed valve body 17, the linkage structure through low speed valve body screw thread 49 can make stretching valve low speed valve body 13 and 17 axial motions of compression valve low speed valve body.On the external cylindrical surface between low speed valve body screw thread 49 and the low speed valve body spanner 53, be processed with and be used for fixing stretching low speed valve body sealing ring 12 and the low speed valve body sealing ring fixed groove 50 that compresses low speed valve body sealing ring 80.

Quick closing valve directional post 46 inside are processed with the low speed valve ostium 45 coaxial with quick closing valve directional post 46 along axis; The right-hand member of low speed valve ostium 45 is connecting the small end that cone-apex angle is the low speed valve damping taper hole 47 of 30 degree; Low speed valve damping taper hole 47 big ends are communicated with low-speed needle valve chamber 62, and the diameter in low-speed needle valve chamber 62 equates with the Outside diameter of low speed valve damping taper hole 47.Left end in low-speed needle valve chamber 62 is processed with four low speed valve oil outlets 48 that are uniformly distributed with at circumferencial direction of the axis normal of axis and stretching valve low speed valve body 13 and compression valve low speed valve body 17.The right-hand member in low-speed needle valve chamber 62 is processed with internal thread, is used to connect stretching valve low speed needle 15 and compression valve low speed needle 18, and the path of internal thread is identical with the diameter at 62 unthreaded hole places, low-speed needle valve chamber.The right-hand member in low-speed needle valve chamber 62 is processed with the bigger needle-valve closed hole 51 of diameter, and the cylndrical surface of needle-valve closed hole 51 contacts the effect of playing sealing fluid with stretching low speed needle seal ring 14 with compression low speed needle seal ring 81.The end face of needle-valve closed hole 51 and 62 joints, low-speed needle valve chamber plays the position-limiting action of stretching valve low speed needle 15 and compression valve low speed needle 18 strokes.The rotational axis conllinear of low speed valve ostium 45, low speed valve damping taper hole 47, low-speed needle valve chamber 62, needle-valve closed hole 51 and stretching valve low speed valve body 13 or compression valve low speed valve body 17.

Consult Figure 14, stretching valve low speed needle 15 is identical with the structure of compression valve low speed needle 18, is bar class formation spare.Stretching valve low speed needle 15 is processed with low speed valve damping cone 54 with the left end of compression valve low speed needle 18, and the cone-apex angle of the low speed valve damping taper hole 47 on the cone-apex angle of low speed valve damping cone 54 and stretching valve low speed valve body 13 and the compression valve low speed valve body 17 is identical.Low speed valve damping cone 54 larger diameter end are less than the diameter in low-speed needle valve chamber 62, and low speed valve damping cone 54 larger diameter end are connected with columniform low speed valve needle body 63, and low speed valve needle body 63 diameters equate with low speed valve damping cone 54 Outside diameters.Low speed valve needle body 63 right-hand members are provided with the screw rod that is processed with low speed needle screw thread 55; Stretching valve low speed needle 15 and compression valve low speed needle 18 adopts low speed needle screw threads 55 to be connected with compression valve low speed valve body 17 with stretching valve low speed valve body 13 and fixes, and the diameter of screw rod that is processed with low speed needle screw thread 55 is greater than the diameter of low speed valve needle body 63.Low speed needle screw thread 55 right sides are processed with low speed valve guide and limit ring 56, and the annular end face between low speed valve guide and limit ring 56 and the screw thread and needle-valve closed hole 51 contact the effect of playing stretching valve low speed needle 15 and compression valve low speed needle 18 stroke limits with the end face of 62 joints, low-speed needle valve chamber.The right side of low speed valve guide and limit ring 56 is processed with low speed needle seal ring fixed groove 57, is used for fixing stretching low speed needle seal ring 14 and compression low speed needle seal ring 81 are installed.The right side of low speed needle seal ring fixed groove 57 is provided with columniform low speed needle spanner 58, is processed with low speed needle U-groove bevel 59 on the right side of low speed needle spanner 58.Through this low speed needle U-groove bevel 59 circumgyration stretch valve low speed needle 15 and compression valve low speed needle 18 easily,, can make stretching valve low speed needle 15 and compression valve low speed needle 18 produce axial motions through the interconnect function of screw thread 55.

Consult Figure 15, piston cylinder bottom valve assembly 21 is parts in the former commercial car vibration damper.The main body of piston cylinder bottom valve assembly 21 is a piston cylinder bottom valve body 64, and piston cylinder bottom valve body 64 upper ends are equipped with at the bottom of the piston cylinder compensation valve block 75 at the bottom of the recuperation valve spring 74 and piston cylinder, and the lower end is equipped with piston cylinder base compression valve block 76.Piston cylinder bottom valve assembly 20 is fixedly connected with piston cylinder 6 through the cylndrical surface, upper end of piston cylinder bottom valve body 64, and promptly the internal diameter of the cylndrical surface, upper end of piston cylinder bottom valve body 64 and piston cylinder 6 is a transition fit.The lower end of piston cylinder bottom valve body 64 contacts fixing with oil storage cylinder lower end cap 60 inner conical face through conical surface.

Consult Figure 16, under the vibration damper fixedly ear assembly 22 be the parts in the former commercial car vibration damper.Under the vibration damper fixedly ear assembly 22 comprise under oil storage cylinder lower end cap 60 and the vibration damper fixedly ear, under oil storage cylinder lower end cap 60 and the vibration damper fixedly ear employing welding manner be fixedly connected.Under the vibration damper fixedly ear be provided with vibration damper lower fixed hole 61, be used to wear the bolt vibration damper, oil storage cylinder lower end cap 60 is for by the circular shell class formation spare of being formed at the bottom of cylinder and the curved surface.Fixedly the rotational axis of the vibration damper lower fixed hole 61 on the ear and the rotational axis of oil storage cylinder lower end cap 60 intersect vertically under the vibration damper.Under the vibration damper fixedly the external cylindrical surface of the top end of the ear assembly 22 oil storage cylinder lower end cap 60 through wherein and upper end and bypass valve housing 7 bottoms go up fixedly earhole with down fixedly earhole contact to be connected and be connected with transition fit, employing is welded and is fixed between the external cylindrical surface of oil storage cylinder lower end cap 60 and by-pass valve body 7 bottom surfaces.After the installation, the axis of vibration damper lower fixed hole 61 and piston rod 72 intersect vertical axis.

The adjustable mechanical vibration reducing device of high low speed bidirectional damper stretching travel working procedure:

Low speed segment:

Former damper piston assembly 3 outwards moves; Upper piston chamber 65 volumes reduce; Pressure increases, and a fluid part is wherein crossed shock absorber piston through normal open hole in the spring valve plate 25 on the former damper piston assembly 3 and the normal open orifice flow in the piston body 73 and got into lower piston chamber 68, produces damping force.The stretching opening 27 that another part fluid is flowed through on the piston cylinder 6 gets into intermediate cavity 66; Get into high speed valve pocket 40 through stretching valve middle cylinder intercommunicating pore 31 and bypass valve ostium 39; Because the underpressure that produces during low speed is to overcome the preload pressure of stretching valve quick closing valve spring 9; The end face of stretching valve high speed valve body 8 is pressed on the left side of high speed valve pocket 40; All fluid gets into low speed valve through the low speed valve ostium 45 of stretching valve low speed valve body 13, forms the annular space between low speed valve damping taper hole 47 and the low speed valve damping cone 54, and the fluid that gets into low speed valve flows through the gap and produces damping force; And after low speed valve oil outlet 48 flows into stretching bypass valve chambers 32 with bypass valve tap hole 41, and via the last shoe cream room 67 of stretching valve oil storage cylinder intercommunicating pore 30 inflows.Because piston rod 72 outwards moves; Total volume in the piston cylinder 6 of vibration damper increases, and lower piston chamber 68 pressure reduce, less than oil storage cylinder 4 internal pressures; Counterbalance spring 74 distortion at the bottom of the piston cylinder on the piston cylinder bottom valve assembly 21; Compensation valve block 75 moves up at the bottom of the piston cylinder, and produces passage between the piston cylinder bottom valve body 64, and the liquid in the following shoe cream room 69 gets into lower piston chamber 68 through this recuperation valve passage.Last shoe cream room 67 is mobile each other through oil storage cylinder intercommunicating pore 29 and compression valve oil storage cylinder communicated cavity 36 with the liquid in the following shoe cream room 69.This moment is through utilizing the low speed needle U-groove bevel rotation needle on the stretching valve low speed needle 15; Through 55 connections of low speed needle screw thread stretching valve low speed needle 15 is moved axially, change low speed valve circulation area (being aperture), can change the damping force that fluid flows through the stretching valve; Thereby change the damping force of vibration damper stretching travel low speed segment; With reference to Figure 17 " power-speed " characteristic under the stretching travel low speed when regulating stretching valve low speed valve aperture, aperture is more little, and absorber damping force is big more; And speed increases, and the damping force of vibration damper increases.

High regime:

Increase with speed, the pressure in the upper piston chamber 65 raises, spring valve plate 25 distortion on the former damper piston assembly 3; To produce the annular pass at spring valve plate 25 centers; Make the fluid passage become big, fluid gets into lower piston chamber 68 through the normal open hole on this passage and the piston body 73, produces damping force.The stretching opening 27 that another part fluid is flowed through on the piston cylinder 6 gets into intermediate cavity 66, gets into high speed valve pockets 40 through stretching valve middle cylinder intercommunicating pore 31 and bypass valve ostium 39.Along with speed increases; Oil liquid pressure raises gradually; When oil liquid pressure during greater than the preload pressure of stretching valve quick closing valve spring 9; Stretching valve high speed valve body 8 slides along quick closing valve directional post 46, produces the space between the end face of stretching valve high speed valve body 8 and the end face of high speed valve pocket 40, and fluid passes through this gap; Then get into stretching bypass valve chambers 32, then get into and go up shoe cream room 67 through stretching valve oil storage cylinder intercommunicating pore 30 through the bypass valve tap hole on quick closing valve damping hole on the stretching valve high speed valve body 8 38 and the stretching valve quick closing valve housing 10 41.Because the circulation area of quick closing valve damping hole 38 is greater than the low speed valve circulation passage; So this moment vibration damper damping force less than with the absorber damping force of fluid direct current under the uniform velocity when the low speed valve, promptly this moment, vibration damper " power-speed " characteristic curve slope was less than the low speed segment slope of curve.Because piston rod 72 outwards moves; Total volume in the damper piston cylinder increases, and lower piston chamber 68 pressure reduce, less than the in-cylinder pressure of oil storage cylinder 4; Counterbalance spring 74 distortion at the bottom of the piston cylinder on the piston cylinder bottom valve assembly 21; Compensation valve block 75 moves up at the bottom of the piston cylinder, and produces passage between the piston cylinder bottom valve body 64, and the liquid in the following shoe cream room 69 gets into lower piston chamber 68 through this recuperation valve passage.Last shoe cream room 67 is mobile each other through oil storage cylinder intercommunicating pore 29 and compression valve oil storage cylinder communicated cavity 36 with the liquid in the following shoe cream room 69.Utilize the low speed valve body spanner 53 circumgyration stretch valve low speed valve bodies 13 on the stretching valve low speed valve body 13 this moment; Through low speed valve body screw thread 49 stretching valve low speed valve body 13 is moved axially; Change the pretightening force of stretching valve quick closing valve spring 9; Thereby change the end face of stretching valve high speed valve body 8 and the end face separation time of high speed valve pocket 40, change vibration damper stretching travel high regime absorber damping force.With reference to Figure 18 following at a high speed " power-speed " characteristic of stretching travel when regulating stretching valve quick closing valve pretension, pretension is big more, and absorber damping force is big more, and speed increases the damping force increase of vibration damper.

The adjustable mechanical vibration reducing device of high low speed bidirectional damper compression stroke working procedure:

Low speed segment:

Former damper piston assembly 3 moves inward; Lower piston chamber 68 volumes reduce; Pressure increases; The fluid pressure in lower piston chamber 68 is greater than the pretightening force of piston circulation valve spring 70, pushes the spring valve plate in the piston assembly 3 25 opposite side of piston rod to, between spring valve plate 25 and piston body 73, produces passage.Fluid part in the lower piston cylinder 68 gets into upper piston chamber 65 through this passage; Another part of fluid gets into shoe cream room 69 down through the normal open hole on the piston cylinder base compression valve block 76 on the piston cylinder bottom valve assembly 21, through the damping function generation damping force in normal open hole.Some fluid gets into the compression valve piston cylinder communicated cavity 35 of by-pass valve body 7 through the compressive flow through hole on the piston cylinder 6 28 in addition; Then get into high speed valve pocket 40 through the bypass valve ostium on the compression valve quick closing valve housing 16 39; Because the underpressure that produces during low speed is to overcome the preload pressure of compression valve quick closing valve spring 19; The end face of compression valve high speed valve body 20 is pressed on the left side of high speed valve pocket 40; All fluid gets into low speed valve through the low speed valve ostium 45 of compression valve low speed valve body 17, forms the annular space between low speed valve damping taper hole 47 and the low speed valve damping cone 54, and the fluid that gets into low speed valve flows through the gap and produces damping force; And after low speed valve oil outlet 48 flows into compression bypass valve chamber 33 with bypass valve tap hole 41, and via shoe cream room 69 under 36 inflows of compression valve oil storage cylinder communicated cavity.Utilize the low speed needle U-groove bevel rotation needle on the compression valve low speed needle 18 this moment; Through 55 connections of low speed needle screw thread compression valve low speed needle 18 is moved axially; Change low speed valve circulation area (being aperture); Can change the damping force that fluid flows through compression valve, thereby change the damping force of vibration damper compression stroke low speed segment separately.

Because compression piston bar 72 moves inward; Total volume in the damper piston cylinder reduces; Pressure increases; A part of fluid in the upper piston chamber 65 gets into intermediate cavity 66 through the stretching opening on the piston cylinder 6 27, gets into high speed valve pocket 40 through stretching valve middle cylinder intercommunicating pore 31 and bypass valve ostium 39, and the underpressure that produces during owing to low speed is to overcome the preload pressure of stretching valve quick closing valve spring 9; The end face of stretching valve high speed valve body 8 is pressed on the end face of high speed valve pocket 40; All fluid gets into low speed valve through the low speed valve ostium 45 of stretching valve low speed valve body 13, forms the annular space between low speed valve damping taper hole 47 and the low speed valve damping cone 54, and the fluid that gets into low speed valve flows through the gap and produces damping force; And after low speed valve oil outlet 48 flows into stretching bypass valve chambers 32 with bypass valve tap hole 41, and via the last shoe cream room 67 of stretching valve oil storage cylinder intercommunicating pore 30 inflows.The valve low speed needle position influence that stretched of this part damping force.

Consult Figure 19 compression stroke low speed " power-speed " characteristic down when regulating compression valve low speed valve aperture, aperture is more little, and absorber damping force is big more, and speed increases the damping force increase of vibration damper.

High regime:

Former damper piston assembly 3 moves inward; Lower piston chamber 68 volumes reduce, and pressure increases, and a fluid part wherein is moving to piston rod one thruster with the spring valve plate 25 in the former damper piston assembly 3; Around spring valve plate 25, produce circulation passage, flow into upper piston chamber 65.Increase with speed; Lower piston chamber 68 pressure increase, piston cylinder base compression valve block 76 bending deflections on the piston cylinder bottom valve assembly 21, and produce the annular pass between the piston cylinder bottom valve body 64; Part fluid in the lower piston chamber 68 gets into shoe cream room 69 down through this passage, produces damping force.Some fluid gets into the compression valve piston cylinder communicated cavity 35 of by-pass valve body 7 through the compressive flow through hole on the piston cylinder 6 28 in addition; Then get into high speed valve pocket 40 through the bypass valve ostium on the compression valve quick closing valve housing 16 39; When oil liquid pressure during greater than the preload pressure of compression valve quick closing valve spring 19; Compression valve high speed valve body 20 slides along quick closing valve directional post 46; Produce the space between the end face of compression valve high speed valve body 20 and the end face of high speed valve pocket 40; Fluid then compresses bypass valve chambers 33 through quick closing valve damping hole on the compression valve high speed valve body 20 38 and bypass valve tap hole 41 entering on the compression valve quick closing valve housing 16, and flows into shoe cream room 69 down via compression valve oil storage cylinder communicated cavity 36 through this gap.Because the circulation area of quick closing valve damping hole 38 is greater than the low speed valve circulation passage; So this moment vibration damper the absorber damping force of damping force when only flowing through low speed valve with fluid under the uniform velocity, promptly this moment, vibration damper " power-speed " characteristic curve slope was less than the low speed segment slope of curve.Utilize the low speed valve body spanner 53 rotation compression valve low speed valve bodies 17 on the compression valve low speed valve body 17; Through low speed valve body screw thread 49 compression valve low speed valve body 17 is moved axially; Change the compressive force of compression valve quick closing valve spring 19; Thereby change the end face of compression valve high speed valve body 20 and the end face separation time of high speed valve pocket 40, change vibration damper compression stroke high regime absorber damping force separately.

Because the compression piston bar moves inward, the total volume in the damper piston cylinder reduces, and pressure increases; A part of fluid in the upper piston chamber 65 gets into intermediate cavity 66 through the stretching opening on the piston cylinder 6 27; Get into high speed valve pocket 40 through stretching valve middle cylinder intercommunicating pore 31 and bypass valve ostium 39, increase with speed, pressure increases; When oil liquid pressure during greater than the preload pressure of stretching valve quick closing valve spring 9; Stretching valve high speed valve body 8 slides along quick closing valve directional post 46, produces the space between the end face of stretching valve high speed valve body 8 and the end face of high speed valve pocket 40, and fluid passes through this gap; Then get into stretching bypass valve chambers 32, produce damping force at quick closing valve damping hole 38 places through the bypass valve tap hole on quick closing valve damping hole on the stretching valve high speed valve body 8 38 and the stretching valve quick closing valve housing 10 41.Then get into and go up shoe cream room 67 through stretching valve oil storage cylinder intercommunicating pore 30.The stretched influence of preload pressure of valve quick closing valve spring 9 of this part damping force.

Consult following at a high speed " power-speed " characteristic of Figure 20 compression stroke when regulating compression valve quick closing valve pretension, pretension is big more, and absorber damping force is big more, and speed increases the damping force increase of vibration damper.

In sum, through adjusting the pretension of stretching valve low speed needle 15, compression valve low speed needle 18 positions and stretching valve quick closing valve spring 9, compression valve quick closing valve spring 19, the damping characteristic that can in a big way, regulate vibration damper respectively.

Consulting Figure 21 is the adjustable mechanical vibration reducing device of high low speed bidirectional damper of the present invention " power-speed " characteristic regulation range.Dash area is maximum " power-speed " the characteristic regulation range that stretching valve low speed valve body 13, stretching valve low speed needle 15, compression valve low speed valve body 17 and compression valve low speed needle 18 positions are obtained in the adjustable mechanical vibration reducing device of the high low speed bidirectional damper of adjusting among the figure.

Claims

1. one kind high adjustable mechanical vibration reducing device of low speed bidirectional damper; Comprise under former damper piston up stroke limiting stopper (1), former damper piston assembly (3), oil storage cylinder (4), piston cylinder bottom valve assembly (21) and the vibration damper fixedly ear assembly (22); It is characterized in that the adjustable mechanical vibration reducing device of described high low speed bidirectional damper also comprises middle cylinder retaining ring (2), middle cylinder (5), piston cylinder (6), by-pass valve body (7), stretching bypass valve (77) and compression bypass valve (78);

Former damper piston up stroke limiting stopper (1) is sleeved in the former damper piston assembly (3) to become to be slidingly matched on the piston rod (72); Former damper piston up stroke limiting stopper (1) is connected with the upper-end surface and the inner cylindrical surface contact of oil storage cylinder (4) upper end inner chamber; The central through bore Spielpassung of the intermediate section of former damper piston up stroke limiting stopper (1) and middle cylinder retaining ring (2); The lower end of middle cylinder retaining ring (2) is inserted and is become contact to connect in the endoporus on the middle cylinder (5) that is positioned at oil storage cylinder (4) inner chamber; The lower end of former damper piston up stroke limiting stopper (1) is inserted and is become contact to connect in the endoporus on the piston cylinder (6) that is positioned at middle cylinder (5) inner chamber; Piston body (73) in the former damper piston assembly (3) is slidingly connected with the endoporus of piston cylinder (6); The lower end that by-pass valve body (7) is sleeved on piston cylinder (6) becomes transition fit; The lower end of oil storage cylinder (4) is sleeved on the dome ring body of by-pass valve body (7) upper end; Adopt welding manner to fix between oil storage cylinder (4) and the by-pass valve body (7); The lower end of middle cylinder (5) is inserted and is become transition fit to connect in the middle cylinder hole on the by-pass valve body (7); The external cylindrical surface upper end of the piston cylinder bottom valve body (64) in the piston cylinder bottom valve assembly (21) is connected with the contact of piston cylinder (6) lower end endoporus; Fixedly the following fixedly earhole of the upper end of the oil storage cylinder lower end cap (60) of ear assembly (22) through wherein and by-pass valve body (7) lower end is equipped and adopt welding manner to fix under the vibration damper; The fixing rotational axis conllinear of the oil storage cylinder lower end cap (60) in the ear assembly (22) under former damper piston up stroke limiting stopper (1), oil storage cylinder (4), middle cylinder retaining ring (2), middle cylinder (5), piston cylinder (6), former damper piston assembly (3), piston cylinder bottom valve assembly (21) and the vibration damper; Stretching bypass valve (77) is packed in the stretching bypass valve chamber (32) on the by-pass valve body (7) and through being threaded, and compression bypass valve (78) is packed in the compression bypass valve chamber (33) on the by-pass valve body (7) and through being threaded.

2. according to the adjustable mechanical vibration reducing device of the described high low speed bidirectional damper of claim 1; It is characterized in that; Described by-pass valve body (7) is the housing class formation spare that the cuboid by the cylindrical body in left side and right side links into an integrated entity; The left side is processed with ladder hole from top to bottom on the cylindrical central axis vertically, and first section for installing the middle cylinder hole of middle cylinder (5), and cylindrical upper end be the dome ring body that is equipped with oil storage cylinder (4) with middle cylinder hole coaxial line; Second section is the piston cylinder lumen pore; The 3rd sector hole and the 5th sector hole are upper piston cylinder hole and the lower piston cylinder hole that is used for the piston cylinder (6) of the equipped adjustable mechanical vibration reducing device of high low speed bidirectional damper, and the 4th sector hole is called as the compression valve piston cylinder lumen pore that forms compression valve piston cylinder communicated cavity (35) with piston cylinder (6), and the 6th sector hole is to be communicated with lumen pore with the compression valve oil storage cylinder of piston cylinder (6) formation compression valve oil storage cylinder communicated cavity (36); The 7th sector hole is called fixedly earhole, and the 8th sector hole is called down fixedly earhole;

Be processed with the stretching bypass valve chamber (32) and the compression bypass valve chamber (33) of circle hole shape on the cuboid of by-pass valve body (7) right side; Cylindrical body central axis on the left of rotational axis and the by-pass valve body (7) of stretching bypass valve chamber (32) and compression bypass valve chamber (33) is vertical and be in the same vertical plane; The right side of stretching bypass valve chamber (32) and compression bypass valve chamber (33) is provided with the quick closing valve housing seal circle (11) that stretches and contacts the cylndrical surface that seals with compression quick closing valve housing seal circle (79); The neutral position of stretching bypass valve chamber (32) and compression bypass valve chamber (33) is processed with the internal thread that is used to be connected stretching valve quick closing valve housing (10) and compression valve quick closing valve housing (16); Be processed with the stretching valve middle cylinder intercommunicating pore (31) of coaxial line on the left side of stretching bypass valve chamber (32), be processed with the compression valve piston cylinder intercommunicating pore (34) of coaxial line on the left side of compression bypass valve chamber (33);

The periphery of by-pass valve body (7) left side semicylinder is evenly equipped with seven axial oil storage cylinder intercommunicating pores (29) that are communicated with compression valve oil storage cylinder communicated cavity (36), and the periphery of the semicylinder that is connected with the cuboid left side in the by-pass valve body (7) is processed with 1 axial stretching valve oil storage cylinder intercommunicating pore (30) that is communicated with stretching bypass valve chamber (32).

3. according to the adjustable mechanical vibration reducing device of the described high low speed bidirectional damper of claim 1, it is characterized in that described stretching bypass valve (77) is identical with the structure of compression bypass valve (78); Described stretching bypass valve (77) comprises stretching valve high speed valve body (8), stretching valve quick closing valve spring (9), stretching valve quick closing valve housing (10), stretching quick closing valve housing seal circle (11), stretching low speed valve body sealing ring (12), stretching valve low speed valve body (13), stretching low speed needle seal ring (14) and stretching valve low speed needle (15);

Stretching quick closing valve housing seal circle (11) is packed in the quick closing valve housing seal circle fixed groove (43) on the stretching valve quick closing valve housing (10); Stretching valve low speed valve body (13) is packed in the stretching valve quick closing valve housing (10) and through being threaded; Stretching low speed valve body sealing ring (12) is packed in the low speed valve body sealing ring fixed groove (50) on the stretching valve low speed valve body (13); Stretching valve low speed valve body (13) left end is set with stretching valve quick closing valve spring (9); The left end of stretching valve quick closing valve spring (9) is sleeved on the cirque body of stretching valve high speed valve body (8) right-hand member; The left side of stretching valve high speed valve body (8) is connected with the left side contact of stretching valve quick closing valve housing (10) inner chamber; Stretching valve low speed needle (15) is packed in the stretching valve low speed valve body (13) and is adopted and is threaded, and stretching low speed needle seal ring (14) is packed in the low speed needle seal ring fixed groove (57) on the stretching valve low speed needle (15).

4. according to the adjustable mechanical vibration reducing device of the described high low speed bidirectional damper of claim 3, it is characterized in that described stretching valve quick closing valve housing (10) is a cylinder class formation spare; The stage casing of the outer surface of stretching valve quick closing valve housing (10) is processed with quick closing valve housing screw thread (42); Stretching valve quick closing valve housing (10) low order end is the quick closing valve housing spanner (44) that the annular knurl decorative pattern is set; Be processed with the quick closing valve housing seal circle fixed groove (43) that is used to install stretching quick closing valve housing seal circle (11) on quick closing valve housing screw thread (42) on the stretching valve quick closing valve housing (10) and the external cylindrical surface between the quick closing valve housing spanner (44); The high order end center of stretching valve quick closing valve housing (10) is processed with bypass valve ostium (39); Be processed with high speed valve pocket (40) coaxial with bypass valve ostium (39) and that be communicated with in the stretching valve quick closing valve housing (10); The right side of the inner cylindrical surface of high speed valve pocket (40) is provided with the internal thread that cooperates with low speed valve body screw thread (49); The internal thread right side contacted circular unthreaded hole of low speed valve body sealing ring (12) that is set to and stretches, the left position of quick closing valve housing screw thread (42) are processed with four bypass valve tap holes (41) that axis and the perpendicular circumferencial direction of stretching valve quick closing valve housing (10) axis are uniformly distributed with.

5. according to the adjustable mechanical vibration reducing device of the described high low speed bidirectional damper of claim 3, it is characterized in that described stretching valve low speed valve body (13) is a cylinder class formation spare; The high order end of stretching valve low speed valve body (13) is processed with columniform quick closing valve directional post (46); The right-hand member of quick closing valve directional post (46) is spring directional post (52); Be processed with low speed valve body screw thread (49) on the toric external cylindrical surface of spring directional post (52) right-hand member; The low order end of stretching valve low speed valve body (13) is processed with low speed valve body spanner four prism type or hexagon (53), on the external cylindrical surface between low speed valve body screw thread (49) and the low speed valve body spanner (53), is processed with the low speed valve body sealing ring fixed groove (50) that is used for fixing stretching low speed valve body sealing ring (12);

Quick closing valve directional post (46) is processed with the low speed valve ostium (45) coaxial with quick closing valve directional post (46) along axis; The right-hand member of low speed valve ostium (45) connects the small end of low speed valve damping taper hole (47); The big end of low speed valve damping taper hole (47) is communicated with low-speed needle valve chamber (62); The diameter in low-speed needle valve chamber (62) equates with the Outside diameter of low speed valve damping taper hole (47); Left end in low-speed needle valve chamber (62) is processed with four the low speed valve oil outlets (48) that are uniformly distributed with at circumferencial direction of the axis normal of axis and stretching valve low speed valve body (13); The right-hand member in low-speed needle valve chamber (62) is processed with internal thread; The right-hand member in low-speed needle valve chamber (62) is processed with needle-valve closed hole (51), the rotational axis conllinear of low speed valve ostium (45), low speed valve damping taper hole (47), low-speed needle valve chamber (62), needle-valve closed hole (51) and stretching valve low speed valve body (13).

6. according to the adjustable mechanical vibration reducing device of the described high low speed bidirectional damper of claim 3; It is characterized in that; Described stretching valve low speed needle (15) is a bar class formation spare; The left end of stretching valve low speed needle (15) is processed with low speed valve damping cone (54); The cone-apex angle of the low speed valve damping taper hole (47) on the cone-apex angle of low speed valve damping cone (54) and the stretching valve low speed valve body (13) is identical; The larger diameter end of low speed valve damping cone (54) is less than the diameter in the low-speed needle valve chamber (62) on the stretching valve low speed valve body (13); The larger diameter end of low speed valve damping cone (54) is connected with the columniform low speed valve needle body (63) that equates with low speed valve damping cone (54) Outside diameter; The right-hand member of low speed valve needle body (63) is provided with the screw rod that is processed with low speed needle screw thread (55); The diameter of screw rod that is processed with low speed needle screw thread (55) is greater than the diameter of low speed valve needle body (63), and the right side of low speed needle screw thread (55) is processed with low speed valve guide and limit ring (56), and the right side of low speed valve guide and limit ring (56) is processed with the low speed needle seal ring fixed groove (57) that is used to install stretching low speed needle seal ring (14); The right side of low speed needle seal ring fixed groove (57) is provided with columniform low speed needle spanner (58), is processed with low speed needle U-groove bevel (59) on the right side of low speed needle spanner (58).