Hydraulic telescopic shock absorber

FIELD: machine building.

SUBSTANCE: shock absorber includes a housing, a cylinder, a stock, a piston-valve, a sleeve-governor, a rod with tracks, which is telescopically installed in the stock, a bottom valve, and a guide of the stock. Tracks on the rod are screw-shaped and have constant or variable angle of twist to the stock axis. When moving on the rod track, the guide stop turns the sleeve-governor; at that, holes in the stock are covered, thus changing the quantity of bypassed liquid. As per the first version, in the shock absorber the rod end is fixed in the bottom valve zone against being turned and against axial movement. As per the second version, in the shock absorber the rod end is fixed in the bottom valve zone against axial movement. Shock absorber includes an additional valve with channels adjoining the bottom valve holes. When moving on the rod track, the guide stop that is additionally made on the stock turns the rod; at that, holes in the additional valve are covered, thus changing the quantity of bypassed liquid.

EFFECT: obtaining automatic adjustment of a shock absorber force depending on a stock position, as well as providing the possibility of readjustment of the shock absorber without its removal.

2 cl, 3 dwg

 

The invention relates to transport machinery, namely, design of hydraulic telescopic shock absorbers and struts vehicles.

You know the strut device of the vehicle (Manual, maintenance and repair of motor vehicles: BA3-2110, BA3-2111, BA3-2112", Moscow, publishing house "Livre", 1998, p.73, figure 4-1, figure 4-2), comprising a housing, a rod guide bushing piston rod, cylinder, piston, valve compression.

This device is used to change the efforts of the resistance depending on the speed of movement of the rod. It is insensitive to the position of the rod at a particular moment. The position of the rod, as a rule, corresponds to the position of the vehicle wheels: the mean position of the piston, the absence of irregularities on the road surface, the rod in the lower position is the projection of the rod in the upper position of the recess on the surface of the road. Various provisions of the stock required different values of resistance efforts, in the middle position - the minimum resistance of the comfort zone, in the extreme positions of the maximum resistance - protection "breakdown"thus, the above device does not provide an effective response to changing external factors, in this case, the elevation of the road surface.

A device (A.S. SU 1135934 F1F 9/48) comprising a housing, the cylinder, piston rod, telescopic tube with a longitudinal groove, set in stock, and interacting Eden part of the cylinder or valve.

The described device allows you to change the drag force depending on the position of the rod, thereby increasing the smoothness of the vehicle.

A disadvantage of this device is to regulate only one option - drag force in compression, while no less important for the vehicle is the drag force at the end.

In addition, the device does not allow to carry out the adjustment without dismantling and disassembly. Other functional disadvantage is the inability to automatically change efforts of the shock absorber when turning the vehicle in case of using this device in the front racks of the car. The elimination of this disadvantage would reduce roll when turning the vehicle, thereby improve the handling and stability of the latter.

The technical task of the claimed hydraulic telescopic shock absorber is the ability to obtain automatic adjustment efforts of the resistance of the shock absorber depending on the position of the rod, the possibility of reconfiguration of the shock absorber without disassembly and dismantling.

The technical result is an atom of the inventive hydraulic telescopic shock absorber is to increase comfort and safety during vehicle operation.

The technical result is achieved by the hydraulic telescopic shock absorber, comprising a housing, a cylinder, a piston rod installed on the parts of the piston-valve and sleeve-regulator, regulating the flow return the fulfilled liquid, the holes drilled in the rod, and the slot in the bushing-Governor, rod track telescopically mounted inside the rod, valve, guide rod, track rod made spiral with constant or variable angle of twist to the axis of the stem, while in contact with the guide stop or stops made on the stock or its parts, when moving rod the guide stops moving along the track rod, rotates the sleeve-knob relative to the shaft, while the holes in the stem overlap partially or completely, changing the amount of return the fulfilled through the gaps in the stem cavity and core fluid, and one end of the rod is fixed in the area of the bottom of the valve against rotation and axial movement. Also the technical result is achieved by the hydraulic telescopic shock absorber, comprising a housing, a cylinder, a piston rod installed on the parts of the piston-valve and sleeve-regulator, regulating the flow return the fulfilled liquid, the holes drilled in the rod, and a hole is made in the sleeve-regulator, rod with tracks, telescopically mounted within the stem, bottom valve, rod guide, wherein the track rod made spiral with constant or variable angle of twist to the axis of the stem, while in contact with the guide stop or stops made on the stock or its parts, when moving rod guide stops moving along the track rod, rotates the sleeve-knob relative to the shaft, while the holes in the stem overlap partially or completely, changing the amount of return the fulfilled through the gaps in the stem cavity and core fluid, and a guide fence made additional stock, if moving rod moving along the track rod, turns the rod, with the end of the rod is fixed in the area of the bottom valve from inadvertent axial movement and is made in the form of additional valve with channels adjacent to the hole bottom valve for the passage of fluid, the channels and holes move upon rotation of the rod, there is a partial or complete overlap of the holes, the cross-sectional area of the channels and holes of the same or different, and the additional connection with the valve rod is stationary or swivel.

1 shows a General view of a hydraulic telescopic shock absorber, etc the longitudinal incision.

The absorber consists of a body 1, a cylinder 2, a piston 3, parts of the rod, regulating the flow return the fulfilled liquid: piston-valve 4 and the sleeve of the regulator 5, core 6, telescopically installed inside the shaft and fixed in the area of the bottom valve 7 from rotation and axial movement, a guide rod 8, track 9, the guide stops 10, holes 11 and 12 are made in the rod and the hole 13 made in the bushing-Governor, rod made a plot of the track 14 with a close to zero angle of twist to the stem axis. Nadporshnevaya cavity absorber marked with the letter A, podpornega cavity by the letter B.

Figure 2 shows a variant of a hydraulic telescopic shock absorber, containing additionally the guide fence 15, performed on the rod, additional valve 16 channels 17, which is connected with the rod by a hinge 18, the holes flush valve for passage of fluid 19, the pressing spring 20.

Figure 3 shows a variant of a hydraulic telescopic shock absorber, containing additionally a smart stop 21.

The shock absorber works as follows.

The execution of the construction of figure 1. The device performs the automatic adjustment efforts end depending on the position of the rod in its longitudinal movement in the cylinder 2 and the adjustment efforts end in chief is the stem.

When moving rod 3 upwards together with the sleeve-regulator 5 guide stop 10 moves along the track 9, the rod 6 rotates the sleeve 5 relative to the shaft 3, the orifices 12 and 13 overlap partially or completely, changing the amount of return the fulfilled fluid from the cavity And into the cavity B, through the gaps in the stem cavity 3, and the rod 6. This is achieved by increasing the efforts of the resistance created by the sleeve 5 together with the piston 4. The higher moves the rod, the more overlap the holes 12 and 13. The drag force near the top dead point of the piston, a maximum. While the emphasis on plot 14 track 9 with the twisting angle close to zero to the axis of the rod provides maximum matching holes 12 and 13 - area of the rod position with a minimum of drag force.

When the rotation shaft 3 relative to the body 1 (for example, when using a shock absorber in the front racks of the vehicle when turning the wheels) hub controller 5 is held from turning lanes 9 fixed rod 6 through the stop 10. There is a mutual offset and overlapping holes 12 and 13, changes the force resistance of the shock absorber, when in this position the stem.

If you want to manually adjust the efforts of the resistance of the shock absorber, the rotation of the rod around its longitudinal axis, otverstie, in the initial position, is combined with a hole 11, having a different value of the cross-sectional area.

At the stroke down into the cavity And form a zone of suction, the position of the holes 12 (or 11) and 13 do not affect the operation of the shock absorber. Is the work of the piston-valve 4 and the bottom valve 7.

The execution of the construction of figure 2. The device performs the automatic adjustment of the compression force of depending on the position of the rod in its longitudinal movement in the cylinder 2 and the adjustment of the compression force of rotating the rod.

When stroke 3 up is the work of the piston-valve 4 and the valve 7. When stroke down the stop 15, performed on the rod 3, getting on a stretch of track 9 from twisting around the longitudinal axis of the rod rotates the rod 6 together with an additional valve 16, with the channels 17 additional valve is displaced relative to the holes 19 of the bottom valve for the passage of fluid. There is a partial or complete overlap of the holes 19, thereby increasing the drag force when compressed. To compensate for possible flatness of the valves 16 and 7, the connecting rod 6 and the additional valve 16 is made by means of the hinge 18. The spring 20 holds the rod 6 against inadvertent axial displacement. Plot track 14 provides a constant minimum drag force CR is the compression.

When the rotation shaft 3 relative to the body 1 (for example, when using a shock absorber in the front racks of the vehicle when turning the wheels) the emphasis of the rod 15, interacting with the track 9, rotates the rod 6 and the additional valve 16. Holes 19 are partially or completely overlap the valve body 16; the resistance to the passage of the fluid increases. Increase efforts compression reduces the amount of roll of the vehicle on the appropriate side.

For manually adjusting the compression force of, in the initial position, the rotation shaft is set to the desired combination of channels 17 and holes 19, bearing in mind that the holes and channels, is performed on the valves have different cross-sectional area.

The performance of the design in figure 3. The device performs the automatic adjustment efforts rebound and compression depending on the position of the rod in its longitudinal movement in the cylinder 2 and the adjustment of the compression force of rotating the rod.

When stroke 3 up the stop 21 is transferred to the area of the track 14 with a close to zero angle of twist around the axis of the rod, the rod 6 is practically not rotated, the stop 10 is transferred to the area of the track 9 is twisted around the axis of the rod by turning the sleeve-controller 5. Is similar in the execution of figure 1. When stroke down the stop 21, performed the stem goes to the twisted plot tracks 9, through which rotates the rod 6 together with the valve 16. Is similar in the execution of figure 2.

For a better understanding of the track 9 of the rod 6 and the lugs 21 and 10 is depicted in the illustrations conditionally schematically. In reality, the rod may be, for example, triangular profile, axial twisting in certain areas, and emphasises respectively made in the form of holes triangular cross-section.

Thus, the claimed absorber allows you to receive automatic configuration of the efforts of the resistance of the shock absorber depending on the position of the rod and the possibility of reconfiguration of the shock absorber without disassembly and dismantling.

The device can be applied in existing shock absorbers and struts vehicles without structural modification of the connecting nodes.

1. Hydraulic telescopic shock absorber, comprising a housing, a cylinder, a piston rod installed on the parts of the piston-valve and sleeve-regulator, regulating the flow return the fulfilled liquid, the holes drilled in the rod, and the slot in the bushing-Governor, rod track telescopically mounted inside the stem, bottom valve, rod guide, wherein the track rod made spiral with constant or variable angle of twist to the stem axis, when this is m contact with the guide stop or stops, made in stock or its parts, when moving rod guide stops moving along the track rod, rotates the sleeve-knob relative to the shaft, while the holes in the stem overlap partially or completely, changing the amount of return the fulfilled through the gaps in the stem cavity and core fluid, and one end of the rod is fixed in the area of the bottom of the valve against rotation and axial movement.

2. Hydraulic telescopic shock absorber, comprising a housing, a cylinder, a piston rod installed on the parts of the piston-valve and sleeve-regulator, regulating the flow return the fulfilled liquid, the holes drilled in the rod, and the slot in the bushing-Governor, rod track telescopically mounted inside the stem, bottom valve, rod guide, wherein the track rod made spiral with constant or variable angle of twist to the axis of the stem, while in contact with the guide stop or stops made on the stock or its parts, when moving rod guide end stop, moving along the path of the rod rotates the sleeve-knob relative to the shaft, while the holes in the stem overlap partially or completely, changing the amount of return the fulfilled through the gaps in the stem cavity and core fluid, e.g. the work by a stop, performed advanced on the rod when moving rod moving along the track rod, turns the rod, with the end of the rod is fixed in the area of the bottom valve from inadvertent axial movement and is made in the form of additional valve with channels adjacent to the hole bottom valve for the passage of fluid, the channels and holes move upon rotation of the rod, there is a partial or complete overlap of the holes, the cross-sectional area of the channels and holes of the same or different, and the additional connection with the valve rod is stationary or swivel.



 

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