FI110634B - A damping arrangement - Google Patents

Description

V INSTRUMENT S ORDER. "Λ. -. .

110634

The invention relates to a damping arrangement in connection with a work machine, in which the pivoting movement of a tool connected to the work machine 5, such as a brush device, is executed using two successive actuators such as a hydraulic cylinder.

It is known in the art to rotate and move implements with hydraulic cylinders, in which pressure relief valves are fitted to the hydraulic pipelines to open at a certain pressure, allowing the cylinder to flex in both directions. Also with plowing plows, a reversible and rising plow solution when driving into an obstacle is known. After the obstacle, the spring returns the plow.

15

When using a pressure relief valve for elasticity, the cylinder must be at an intermediate position of some length to allow for elasticity. In turn, it is difficult to connect a spring, such as a helical spring, to a hydraulic cylinder. The spring must be positioned as an extension of the cylinder, thereby extending the structure and then risking buckling of the structure.

20

When the hydraulic cylinders which move the implement are intentionally driven to the extreme position to make positioning of the implement "1" easy, the above described by means of a pressure relief valve .... : 1 · 25 solves the present problem and the invention is characterized by what is stated in the claims.

An advantage of the invention is that the movements executed by the cylinders or other actuators are flexible in both directions, even when the actuators are in their extreme positions. With ... 30 elasticity in the joints, you don't need to make any changes to your business equipment.

If necessary, elasticity can be provided in both longitudinal directions of the arm.

2 110634

It is advantageous to implement the longitudinal flexibility of the articulated arm by means of a hydraulic cylinder for forming the arm. Due to the shortness of the arm, the articulation of the articulated arm can also be implemented by means of a spring connected to the arm, against which the arm becomes longer or shortened. The most common working positions of a tool with the training system of the invention can be adjusted to be at the extreme positions of the business implements, i.e. the longest or shortest dimension of the actuator, whereupon the position of the tool remains constant and easy to adjust.

In the following, the invention will be explained in more detail with reference to the accompanying drawing, in which Figure 1 shows a pivot arrangement of a shark device disposed beneath a work machine.

Figure 2 illustrates a shark device in a reversed transport position.

Figure 3 shows a flexible structure of an articulated arm.

15 shows a brush device rotatable by cylinders 11 and 5 below the body 2 of the machine, including a housing 17, a protective housing 1, an axis 16 and a cylindrical brush 15. 5 for extreme positions, either long or short. The positions of the end 6 of the piston rod of the cylinder 5 are represented by dotted circles 6 'and 6 ". The piston 14 has an adjusting device 7 for adjusting the shortest dimension of the cylinder.

The cylinder 11 is pushed into the workstation when the cylinder 11 is extended outward to a maximum position L. When the cylinder 11 is fully retracted and also the cylinder 5 is shortened, the brush device moves to the transport position parallel to the body 2. Between the cylinders there is a pivot arm 25, which is connected to the pivot point 9 on the body 2. The pivot arm is a hydraulic cylinder 8, which has pivot points at one end for attaching the cylinders 5 and 11. 1 "; The cylinder 8 is depicted in its shortest position. If the pressure can escape together through 18. .,: for pressure relief valve 20, cylinder 8 may be elongated and flexible if pressure relief: ''; The control pressure of 30 valves 20 under load is exceeded. If the brush device is turned to the work angle,. . : where the joint 6 is in position 6 ', both cylinders 5 and 11 are in their longitudinal positions 3 110634 and cannot flex if the brush device hits an obstacle so as to rotate counterclockwise.

5 If the situation causes an overload, the cylinder 8 can be lengthened and then elasticity occurs. Driving in the opposite direction of the barrier tends to shorten the cylinders 5 and 11 and the elasticity can be solved by these pressure relief valves (not shown) located in the hydraulic pressure line.

10 If the brush device is rotated to a working angle where the hinge 6 is in position 6 ", i.e. the cylinder 5 at its shortest, only cylinder 11 is capable of flexing or shortening in the day-ahead overload situation of the shaving device. Thus, the resilience of the cylinder 8 can be made unidirectional, i.e. elongated, and can be kept at the shortest position by the pressure supply 15. The pressure supply is e.g. via line 27 via a directional valve 26 either automatically from the pressure side of the hydraulic pump

If desired, the cylinder 8 also provides elasticity in both directions. The piston 20 of the cylinder is then kept in its normal position in the intermediate position of the cylinder, preferably at mid-stages.

In this case, for example, one space in the cylinder can be connected together via a pressure accumulator 18 and the other tl):. i space one 19 by means of another pressure accumulator, whereby the piston tends to remain in the middle stages of the cylinder:

* · T ',' In Fig. 2, the brush device is raised from the ground and rotated to a transport position parallel to the body 2. All cylinders are in their shortest position. The cylinder 5 also has. ..: adjustable length limiter 10. Flexibility is not usually required in the transport position.

Fig. 3 shows an example of a mechanical articulated arm having a telescopically movable arm 25. The arm tube has a long hole 23 and the arm 25 has a transverse inner. ·,: A studded pin 22 which allows the arm 25 to move about the length of the hole 23. At the end of the tube arm 4 110634 there is a flange 24 and a helical spring 21 is disposed between the flange 24 and the pin. The spring and bore 23 allow the arm to extend against the spring force. The spring is selected such that a certain traction force is required before the shaft even begins to extend. Instead of the helical spring, other known elastic members 5 may be in question. The actuators may be hydraulic or air cylinders for longitudinal movement or linear screws for linear motion.

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Claims (3)

5 Patent Claims 110634 A damping arrangement for a work machine, wherein the movement of a tool attached to the machine, such as a brush device (15,16), is performed using two successive actuators (5), (11), the actuators having a pivoting pivoting pivoting arm the second actuator (5) being secured, characterized in that the pivot arm is arranged longitudinally elastic in at least one direction, said elastic being adapted to take place with at least one actuator (5), (11) pushed to the extreme position. 2. Dämpningsanordning enligt patentkrav 1 tiltecknad därav, att ledskaftet är en hydraulisk cylinder (8), shaft dämpning ja arrangerad med hjälp av en tryckbegränsnings-15 vent (20) i tryckvätskalinjen. A damping arrangement according to claim 1, characterized in that the articulated arm is a hydraulic cylinder (8) whose elasticity is provided by a pressure relief valve (20) disposed in the pressure line. 15 A damping arrangement according to claim 1, characterized in that the articulated arm is an elongated or shortened arm relative to the resilient member (21). 20 »« «· * · * i · I * f *» »· * · 25» · 'tr · <ti · ♦ t 30 t 110634 5 1. Dämpningsanordning i samband med en arbetsmaskin, dör rörelse av ett Verktyg, liksom av en borsteanordning (15,16) ar genomfört med att använda tva successiva rörelseaktivato-rer (5), (11), colors där mellan aktivatorema ligger et med hjälp av första Aktivator (11) svän-gande ledskaft, i vars svängande ända den andra aktivatoren (5) fast, känneteck-n ad därav, att ledskaftet är arrangerat att spare flexibelt i sin längdsriktning ätminstone account 10 en riktning, colors these dämpning är anpassad att ta när ätminstone en Aktivator (5), (11) är driven till sin yttersta position och är ubbelastad mot den yttersta positioned 3. Dämpningsanordning enligt patentkrav 1 kännetecknad därav, att ledskaftet and that is som blir längre eller kortare mot dämpningsorganet (21). 2 &. * · • · · '2 5: * I · • t · • · 30