CN101915280B

CN101915280B - Stepless damping-force adjustable shock absorber

Info

Publication number: CN101915280B
Application number: CN201010254042XA
Authority: CN
Inventors: 李捷; 杨建伟; 曾恒; 张惠刚; 刘海波; 葛友刚
Original assignee: Taiyuan University of Science and Technology
Current assignee: Taiyuan University of Science and Technology
Priority date: 2010-08-11
Filing date: 2010-08-11
Publication date: 2011-11-02
Anticipated expiration: 2030-08-11
Also published as: CN101915280A

Abstract

The invention relates to a stepless damping-force adjustable shock absorber belonging to the technical field of vehicle shock absorption. The stepless damping-force adjustable shock absorber comprises an upper base, a lower base, an upper cylinder cover, a lower cylinder cover, a piston rod, a piston, a working cylinder, an oil storage cylinder and the like. The stepless damping-force adjustable shock absorber is characterized in that the left side of the lower base is provided with a short cylinder, the center of the short cylinder is radially provided with crossed through holes which are communicated with four through holes on a left end surface, and an electro-hydraulic proportional valve and a safety valve are installed in through holes of the lower base; a bent oil channel is arranged on the upper cylinder cover and is provided with two openings, one opening is communicated with a working cavity, and the other opening is communicated with an oil pipe; and the joint of the piston and the piston is provided with a metal raised check ring and a rubber ring. The upper base of the shock absorber is connected with a body of a locomotive, and the lower base is connected with a steering frame. When the locomotive generates shocks, the upper base drives the piston to scretch or compress in the working cylinder to press oil liquid to flow in a system and generate a damping action. Meanwhile, the electro-hydraulic proportional valve controls the size of a tapping area according to the strength of current to control damping force to change along with the working condition of the locomotive so that the damping force can be adjusted and controlled in real time.

Description

Stepless damping-force adjustable shock absorber

Technical field

The invention belongs to the Vehicle damper technical field, be specifically related to a kind of stepless damping-force adjustable shock absorber.

Background technique

At present, along with rapid economy development, vehicle borne moved at a high speed proposed urgent requirement, particularly the high-speed operation development to railway locomotive is with rapid changepl. never-ending changes and improvements, locomotive moves at a high speed and many problems can occur, all can reduce as the working life and the travel safety of the stationarity of vehicle, travelling comfort, vehicle component.In order to overcome this problem, vibration damping equipment is installed all on the locomotive.But at present, the vibration damper that uses on the vehicle mostly is passive vibration damper, and its damping and rigidity are changeless by experience design, can not reach according to actual conditions in the vehicle operating and regulate at random, so do not reach desirable effectiveness in vibration suppression.

Summary of the invention

The object of the invention provides a kind of damping shock absorber of new structure, can effectively overcome the shortcoming that prior art exists.

The present invention is such realization, be Fig. 1, shown in 2, it is a twin-tub oil pressure damping shock absorber, include upper bed-plate 1, lower bottom base 2, upper cylinder cover 3, following cylinder cap 4, piston rod 5, piston 6, clutch release slave cylinder 7, oil storage cylinder 8, dust-proof cover 9 etc., its structure is to link together by clutch release slave cylinder 7 in the middle of upper cylinder cover 3 and the following cylinder cap 4, oil storage cylinder 8 left ends are connected with upper cylinder cover 3, right-hand member and lower bottom base 2 are fixed together, what the centre formed is shoe cream room 16, piston rod 5 is installed in the clutch release slave cylinder 7, its left end matches by the center hole of seal ring with upper cylinder cover 3, left end head and upper bed-plate 1 link together, and right-hand member is equipped with piston 6 and is slidingly matched with clutch release slave cylinder 6 by sealing 25.Structure characteristics of the present invention is:

---the structure (shown in Fig. 3,4,5) of described lower bottom base 2 is, left side shape is a short cylinder, and heart portion radially has criss-cross through hole therein, comprise through hole K1, K2, K3, K4, the through hole on the left side comprises through hole K5, K6, K7, K8, and through hole K1, K2, K3, K4 and through hole K5, K6, K7, the corresponding connection of K8, electro-hydraulic proportional valve 10 are installed in the through hole K1, and pressure spring 11, safety valve spool 18 and spring seat 17 (as shown in Figure 6) are installed in through hole K3.Plug 27 (as shown in Figure 2) is installed in through hole K2, the K4.Through hole K6, K8 on the end face and oil pipe 13 are connected (as shown in Figure 2), and through hole K5, K7 are communicated with (as shown in Figure 1) with shoe cream room 16.

---the structure of described upper cylinder cover 3 is to have bending oil duct 12 in upper cylinder cover 3, bending oil duct 12 has two openings, an opening is connected with left active chamber 14, oil pipe 13 in another opening and the shoe cream room 16 is connected, and oil pipe 13 right-hand members communicate (as shown in Figure 2) with through hole K6, K8 on the lower bottom base 2.

---described piston 6 with piston rod 5 connections rubber ring 24 is installed and round edge omits the metal raised check ring 23 of perk, has 4 through holes 26 (as shown in Figure 7) on the section upper edge axial direction of piston 6.

Advantage of the present invention and good effect:

1, piston 6 adopts the flowing valve that is combined to form by metal raised check ring 23 and rubber ring 24 among the present invention, and this kind flowing valve is easy to processing and produces, and compares with the flowing valve of traditional vibration damper and more saves cost.In addition, this kind method can also reduce the noise that is brought by the fluid impact.

2, lower bottom base 2 of the present invention radially has 4 through holes and 4 through holes is axially arranged, and this kind layout is easy to realize the installation of electro-hydraulic proportional valve 10, when electro-hydraulic proportional valve 10 breaks down, can easily dismantle and repair.Simultaneously at through hole K2, K4 place two plugs 27 are installed, plug 27 can easily be dismantled, and when the fluid of vibration damper is rotten or not enough, is easy to fluid is changed or additional.

3, electro-hydraulic proportional valve 10 of the present invention is in parallel with the safety valve of being made up of safety valve spool 18, pressure spring 11, spring seat 17, can be by rigidity and adjusting electro-hydraulic proportional valve 10 size of current that change safety valve pressure spring 11, change vibration damper different damping power, satisfy the demand of different automobile types the big or small damping force of difference.

4, oil circuit of the present invention adopts the unidirectional cycle arrangement mode of fluid, and the bubble that flow of fluid is produced can rapidly disappear, and reduces to be brought by bubble the influence of resistance of shock absorber distortion.

Description of drawings

Fig. 1 is a structure cutaway view of the present invention

Fig. 2 is the A-A sectional view among Fig. 1

Fig. 3 is the structure sectional view of lower bottom base 2 among the present invention

Fig. 4 is the right elevation of Fig. 3

Fig. 5 is the C-C sectional view among Fig. 3

Fig. 6 is a B portion enlarged view among Fig. 1

Fig. 7 is a D portion enlarged view among Fig. 2

Among the figure: 1-upper bed-plate, 2-lower bottom base, 3-upper cylinder cover, cylinder cap under the 4-, 5-piston rod, the 6-piston, 7-clutch release slave cylinder, 8-oil storage cylinder, 9-dust-proof cover, 10-electro-hydraulic proportional valve, the 11-pressure spring, 12-bending oil duct, 13-oil pipe, 14-left side active chamber, the right active chamber of 15-, the 16-shoe cream room, 17-spring seat, 18-safety valve spool, 19-spring seat, the 20-pressure spring, 21-nut, 22-spool, 23-metal raised check ring, the 24-rubber ring, 25-spool, 26-through hole, 27-plug

Embodiment

As Fig. 1-shown in Figure 7, this stepless damping-force adjustable shock absorber left end is connected with the car body of locomotive by upper bed-plate 1, and right-hand member is connected with the typotron of locomotive by lower bottom base 2.When vibration took place locomotive, upper bed-plate 1 will drive piston rod 5 and piston 6 produces stretching or compression in clutch release slave cylinder 7.When producing stretching, piston 6 can move to left, and the fluid in the left active chamber 14 are entered in the cross through hole of lower bottom base 2 by bending oil duct 12, oil pipe 13, through hole K6, K8.At this moment, electro-hydraulic proportional valve 10 will be according to the situation of body oscillating in the vehicle operating, real-time monitoring electric current power, according to the dam size of open area of the strong and weak directly control of electric current electro-hydraulic proportional valve 10, regulate the size of absorber damping force with this, produce negative pressure in the simultaneously left active chamber 15, the fluid in the shoe cream room 16 is backed down in the right active chamber 15 of spool 22 inflows.Whole process promptly be the mechanical energy of body oscillating is changed into the molecular motion of vibration damper inner fluid heat energy dissipation in atmosphere, play vibration-damping function.When the fluid pressure in the left active chamber 14 is excessive, also can influence the safety valve of forming by pressure spring 11, spring seat 17, safety valve spool 18, to do off-load and control, fluid enters shoe cream room 16 by through hole K5, K7.When producing compression, piston moves to right, make the fluid in the right active chamber 15 back down the left active chamber 15 of rubber ring 24 inflows by the through hole on the piston 6 26, continue by bending oil duct 12, oil pipe 13, through hole K6, K8 enter in the cross through hole of lower bottom base 2, proceed and the identical compression process that stretches, play damping vibration attenuation function.

Claims

1. stepless damping-force adjustable shock absorber, it is a twin-tub oil pressure damping shock absorber, comprise upper bed-plate (1), lower bottom base (2), upper cylinder cover (3), following cylinder cap (4), piston rod (5), piston (6), clutch release slave cylinder (7), oil storage cylinder (8), dust-proof cover (9), its structure is that upper cylinder cover (3) links together by clutch release slave cylinder (7) with following cylinder cap (4) is middle, oil storage cylinder (8) left end is connected with upper cylinder cover (3), right-hand member and lower bottom base (2) are fixed together, what the centre formed is shoe cream room (16), piston rod (5) is installed in the clutch release slave cylinder (7), its left end matches by the center hole of seal ring with upper cylinder cover (3), left end head and upper bed-plate (1) link together, right-hand member is equipped with piston (6) and is slidingly matched by sealing (25) and clutch release slave cylinder (7), and its structure characteristics is:

---the structure of described lower bottom base (2) is, lower bottom base (2) left side shape is a short cylinder, and heart portion radially has criss-cross through hole therein, comprise through hole K1, K2, K3, K4, the through hole on the left side comprises through hole K5, K6, K7, K8, and through hole K1, K2, K3, K4 and through hole K5, K6, K7, the corresponding connection of K8, electro-hydraulic proportional valve (10) is installed in the through hole K1, and pressure spring (11) is installed in through hole K3, safety valve spool (18) and spring seat (17), through hole K2, plug (27) is installed in the K4, through hole K6 on the end face, K8 and oil pipe (13) are connected, through hole K5, K7 is communicated with shoe cream room (16);

---the structure of described upper cylinder cover (3) is to have bending oil duct (12) in upper cylinder cover (3), bending oil duct (12) has two openings, an opening is connected with left active chamber (14), oil pipe (13) in another opening and the shoe cream room (16) is connected, and oil pipe (13) right-hand member communicates with through hole K6, K8 on the lower bottom base (2);

---described piston (6) with piston rod (5) connection rubber ring (24) is installed and round edge omits the metal raised check ring (23) of perk, has 4 through holes (26) on the section upper edge axial direction of piston (6).