FI117958B - Control medium coupling for a dispensing and cutting device for feeders and for changing their feed rate - Google Patents

Description

117958 CONTROL CONNECTION OF PRESSURE MATERIAL FOR DRAWING AND CUTTING EQUIPMENT TO CHANGE THE FEEDING BODIES AND TO SUPPLY THEIR FEEDING SPEED 5

The invention relates to the control connection of the pressure medium of the apparatus for controlling the feeding means and changing their feeding speed according to the preamble of claims 1 and 9.

10 For harvesting the tree trunks, a harvester head is used, i.e. pruning and felling equipment, which is designed to grasp a vertically growing tree, cut the tree and cut it down, then prune and cut it to a certain length using sawing equipment.

One harvester head is disclosed in WO 00/15025. The head of the harvester-15 is usually attached to the crane end of the forestry machine. The harvester head is connected to the crane by a joint and comprises the necessary actuators, usually hydraulic cylinders and hydraulic motors, for controlling the head position and its various functions. The harvester head has pruning members rotatable in relation to the trunk structure, which prune the pruning blades to prune the branches while the tree trunk is supported and driven through the plant. The feed means comprise a drive wheel ... T or a drive roller which presses against the frame and pulls it through the apparatus.

The harvester head also has cutting means, such as a chain saw, for cutting the tree trunk.

s \\ 25 • · * "V Also known are pruning and trimming equipment for the treatment of already felled tree trunks, which prun the tree trunk and cut it to the specified length.

One rubber feed wheel is disclosed in WO 95/01856.

One feeder comprising a track is disclosed in US * 3669161. Usually there are two feed wheels but in WO

* "99/41972 and FI 97340 B of the feed wheels is four, wherein the same side of the feed wheel motors connected in series, and the different sides of the feed-wheel motors 35 are connected in parallel. Mechanical parallel coupling prevents the engine speeds from differing from each other and avoids · ··· * mm. slipping.

'2,117,958

The feed motors are generally fixed rpm, whereby the feed rate is constant and dependent only on the volume flow supplied to the motor. The relatively small size and weight of the feeder motors are suitable for harvester heads with a view to lightness and simplicity of control. However, the drawback is the limited feed rates.

Fl 20020837 A1, in turn, applies a multi-capacity motor as a feed motor for the pruning and cutting equipment. One multi-capacity engine is disclosed in US 6099273. This engine is mainly used in the transmission of vehicles.

15 The motor is a radial piston motor comprising an input and output connection and an additional connection which may function as an input or output connection.

The motor further comprises a selector, i.e. a spindle located in the bore, by means of which a portion of the plunger directs the used volume flow to the normal outlet and the other plungers supply it to the auxiliary outlet. The motor 20 thus has at least two different capacities (dual-capacity motor), i.e. a two-volume motor, in which case it comprises, in a way, two semi-motors. Alternatively, the auxiliary connection may be an auxiliary input through which the volume flow is supplied to the other side ·· *. limoottoriin. However, the rotational speeds of the semi-motors are the same: *. * ·, Because of the 25 common axes. Em. the selector may also be missing, with the motor I ** .; there are always three connections, one of which is connected to all • · · ;; # y pistons and the other two only to specific pistons, so the speeds achieved depend on the type of connections that control the motor.

: 30

. * ··. Connecting multi-capacity motors, eg in Fl 97340 B

However, the coupling according to * · * is problematic because two motors are connected in series, one of which is additionally mechanically coupled to the third motor. In particular, the auxiliary connection of the motor 35, which acts as an output connection, must be connected in such a way that there is no speed difference between the feed wheels. The speed differences are • * • · • · ·. 3; 1,117,958 should be avoided especially when using multi-capacity motors connected to the system to provide different feed rates.

The present invention enables the aforementioned coupling to achieve a multi-speed feed in a simple manner.

The pressure medium control circuit of the pruning and trimming apparatus according to the invention is characterized by what is disclosed in the appended claims 1 and 9. Other dependent claims 10 present some suitable embodiments of the invention.

In particular, the invention relates to the use of a dual capacity motor as a feed motor for pruning and cutting equipment in a situation where four feed wheel motors are driven which rotate four feed wheels. Alternatively, only three feed wheels are rotated, one of which is driven by two motors. The rotational speeds of the two parallel motors are linked to each other, preferably by mechanical coupling. With the dual capacity motor used, two feeds of the different pruning and cutting equipment 20 are fed with the same volume flow to feed the tree trunk through the equipment. The twin-power engine used is lightweight when compared to similar weather-powered * ... ♦ * engines. The conventional engine can be replaced by the engine in question, since the space requirements of the engines are essentially the same, so: ***. hardware does not grow in size.

25 • »· • ♦ ·” V Thanks to the coupling, the speeds of the two parallel-connected feed wheels remain the same to prevent slipping. Also, the operation of the series-connected motors and feed wheels on the different branches of the feed lines remains logical, even though part of the volume flow is directed back to the motor *: 30 rows. Speed selection is simple and can be done with on / off control.

• M

If the space requirement of the motors does not become a problem, the dual capacity motor mentioned above may be replaced by two conventional I :. 35 engine connected in parallel and mechanically to one another, for example on the same shaft, so that they have the same rotational speed * ··· *.

• --- 1 I 117958 4

In one embodiment of the invention, a valve for different connections is included in the dual-capacity motor. The motor still contains three connections, but the valve is used to control the volume flow either to the outlet only or to both outlets and the auxiliary connection.

In a particular embodiment of the invention, a dual-capacity motor (or two motors according to conventional technology) is coupled to both feed wheels. The coupling achieves either three or four feed rates for different pruning and cutting equipment at the same flow rate through which the tree trunk is fed through the equipment. If the twin-capacitance motors are symmetrical, i.e., the respective half-motors of the different motors have the same revolutions, three different speeds are achieved with different switch cells. If the twin-capacity motors are asymmetric, i.e. the respective half motors of different motors have different revolutions, four different speeds are achieved with different connections.

The invention will be illustrated by the following description, with reference to the accompanying drawings, in which: · · ·

Fig. 1 illustrates a control circuit comprising one dual capacity motor and a control valve, 25; ·· * · * Fig. 2 illustrates a control circuit comprising two dual capacity motors and a control valve, and • · t • · * · »··

Fig. 3 shows a twin-capacity motor and a control valve 30 integrated therein.

• · · • · * · · ·

The feed roller rotation speed will vary according to the engine RPM while the feed volume flow remains the same, and vice versa. Feed roller: ···: The feed force directly depends on the pressure used and the engine speed: 35 volumes.

...! • ♦ j ♦ *. · * * · * *! 5,117,958

The figure shows the connection of the supply motors by means of which the supply means of the pruning and cutting equipment are rotated. In this case, the feed members are two feed rollers 13 and 14 which are positioned against and on opposite sides of the tree trunk. The feed rollers 13, 14 are coupled to the motors, which are illustrated by means of mechanical shafts. The feed rollers are known per se and are illustrated with a dashed line. The feed roller motors 9 and 10 are connected in parallel to the feed lines 19 and 20 to which are also connected the motors 7 and 8 which are mechanically coupled to each other, as shown in the figure by the shaft 11. 10 In this embodiment, a single feed roller 12 is also connected to the shaft 11, which is typically located on the frame of the pruning and cutting apparatus against which the tree frame is pressed. Several feed wheels may also be coupled to the shaft 11, and instead of the shaft 11, a mechanical coupling between the two feed wheels may be used, e.g. The motors 7 and 8 have the same rotational speed due to interconnection, so that the volume flow Q supplied from line 6 is evenly distributed to the lines 19 and 20. The volume flow is also evenly distributed to the motors 9 and 10. The lines circulate in a fluid pressure medium, preferably hydraulic oil or the like.

··· * · * ·: ***: For valve 3, which is, for example, a 3-position slide valve, · ** is selected. ·· *. the direction of rotation of the motors 7-10, wherein the volume flow is supplied to either 25 channels 4 (feed forward, and return flow from channel 5) or channel: * V, but 5 (reverse feed, and return flow from channel 4). Valve 3 • · · j: In center position, ducts 4, 5 are closed and motors are stopped. The valve 3 may also have a position in which the motors are engaged in free rotation. The control circuit feeding the valve 3 is known per se and comprises: 30 at least a pressure connection 1 and a return connection 2. The valve 3 is, for example, a pressure controlled proportional directional valve.

··· * 'f *: **! Motor 10 is a dual-capacity motor comprising two half-motors 101 and 102. The volume flow \ t 35 (Q / 2) from motor 7 and line 19 is divided into half-motors 101, 102. side by side. The corresponding drawing describes the mechanical interconnection of two conventional 6 117958 motors. At the same time, the common shaft is illustrated and the semi-motors always have a common rotation speed. Alternatively, the motors 5 are represented by a symbol comprising two nested motor symbols. Each half-motor comprises two basic connections for supply and return of the volumetric flow. One of the basic connections of the half-motors 101, 102 is permanently connected within the motor to the connection which is connected to line 19. The basic connection of the half-motor 101 can be connected to line 15 or line 16, 10 depending on the position of the valve 18. Lines 4 and 15 are connected to line 6. The lengths and junctions of the lines may vary as long as the principle shown is fulfilled. The configuration of the valves 3 and 18 may also vary, since the operation of the valve shown in the figure can also be achieved by one or more members acting as valves. As an example 15, there are two solenoid-controlled shut-off valves, one of which is normally open and the other is normally closed.

The valve 18 is used to select different rotational speeds, and the valve 18 is a separate component from the motor 10 which can be connected to the basic connection 20 of the motor 10. The motor 10 comprises three available interfaces. Valve 18 is preferably a 2-position 3-way solenoid-controlled and spring-return slide valve. The valves 3 and 18 are controlled by a forest machine control system known per se. The basic connection of the semi-motor 102 is connected to line 17 which is common to motor 9 • * / ·; * 25, or directly to line 5. Lines 16 and 17 in are connected to line 5.

In the position of the valve 18 shown in the figure, the flow of line 19 is directed through the semiconductors 101, 102 to a common line 5 (via lines 16 and 17). At the same time, the first no-30 speed of engines 9 and 10 is achieved. When the volume flow of the semi-motor 101 is controlled by valve 18. * · *. back to common line 6 (via line 15), the volume flow distributed to the motors 7 and 8 ./* increases and their speed increases. At the same time, J · * also achieves the second speed of motors 9 and 10, even if the flow rate Q of line 4 remains constant.

. λ 35 • · ·. ·! *: The volumetric flow of the semi-motor 101 must be directed to a common line 6 and not, for example, between the motors 7 and 10, which would result in a speed difference between the drive wheels 13 and 7 117958 14. The internal connections of the motor 10 or the internal selector do not achieve the corresponding direct connection to the line 6 because the motor 7 is interposed, so a line 15 to which the flow is controlled by valve 18 must be used. .

The speed of the motor 10 in the various positions of the valve 18 depends on the ratio of the revolutions of the semi-motors Vg10i to Vg102 and their sum corresponds to the revolution volume of the motor 9. Here, the first rotation speed n-i 10 can be represented by m = Q / 2 (Vg10i + Vg102), which is also the rotational speed of the feed wheel 13 and 14 when no gears are used. Here, the second rotation speed n2 can be represented by the formula n2 = Q / (2- (Vg10i + Vg-102) - Vg10i) when a portion of the flow of line 19 is returned to line 6 and divided into lines 19 and 20.

15

In a situation where the tree trunk is moved backward for a new feed, the direction of the volume flow Q is the opposite of that shown in the figure. The coupling of the half motors 101, 102 in the figure also logically functions in this situation. By the connection of the valve 18 shown in the figure, the velocity m is achieved during the pe-20 extraction.

... T Figure 2 illustrates a situation where motor 9 is also a dual-capacity motor comprising two half-motors 91 and 92. The volume flow (Q / 2) from motor 8 and line 20 is distributed to the half-motors • 9: 25 91, 92. Otherwise the operation corresponds to that of the motor 10, in particular "V when the revolutions of the half-motors 91 and 101 correspond to the revolutions of the half-motors 92 and 102, so that three different speeds are achieved. The first speed is achieved by the first positions , the second speed 30 is achieved when either valve 18 or valve 21 is moved to the operating: *** position, and the third speed is achieved when both valves * 18 and 21 are moved to the second position. common frame structure.

* · • · * 9 * 35 When the RPMs of the semi-motors 91 and 101 differ, four different speeds are achieved. The first speed is achieved with the first positions of the valves 18 and 21 of Fig. 2, the second speed is achieved when the valve 18 is moved to the second position, the third speed is achieved when the valve 21 is moved to the second position, and the fourth speed is achieved when both the valves 18 and 21 are moved to another position. The volume of the co-revolution-5 of the motors 91 and 92 corresponds to the volume of the co-revolution of the motors 101 and 102.

The type and operation of the valve 21 corresponds to the function of the valve 18. The basic connection of the half-motor 92 is connected to line 17 which is common to the motor 10, or directly to line 5. The lines 17 and 22 are connected to line 5. 10 The basic connection of the half-motor 91 can be connected to line 23 or line 22, depending on valve 21 position. Line 23 is connected to line 6.

Figure 3 shows an embodiment in which the valve 18 is incorporated in the structure of the dual-capacity motor 10, whereby the motor 10 further manages three connections. The same solution applies to the dual-pass motor 9 and the valve 21. In the case of Figures 1 and 2, the valve is a separate external component with respect to the motor and in the case of Figure 3 the valve is an internal component belonging to the motor. The medium from the various half-motors is either connected to a single outlet or divided into an outlet. The motor 10 of Figure 3 comprises an input (coupled to line 19), an output (coupled to line 16,17 or 5) and an auxiliary connection (coupled to line 15). The number of connections is smaller compared to situation 1 or 2 and the structure is more compact.

• «1 2 3 • · • ·:. ·. The invention is not limited only to the exemplary embodiments of the ':' y described above, but may be applied within the scope of the appended claims.

• f • · ·· «• 1 • 1 · * · · * M» • · · • • • • 1 * ··· «· '• · • 1 · • · · · 1 · • ·» * • · «· · · 2 • · * ♦ 3

Claims (12)

117958 A control circuit for controlling the pressure medium of the pruning and cutting apparatus for the feeders and for changing their feed rate, the control-switching circuit comprising at least: - a first motor (7) and a second motor (8) arranged to operate one or and a third motor (9) connected in series with the second motor (8) and arranged to actuate the feed member (14), characterized in that the control circuit comprises: in addition: - a fourth motor (10), which is a multi-capacity motor, comprising a first motor (101) and a second motor (102) connected in series with the first motor (7) and arranged to actuate the supply means (13), and - first valve means (18) configured to allow the incoming air from the first half-motor (101) feeding the media to the first and second engines together (7,8). . **: 25 • I I: * Y Control circuit according to claim 1, characterized in that the third motor (9) is a multi-capacity motor comprising a first motor (91) and a second motor (92) connected in series with the second motor (8), and arranged to actuate the feed means (14), and that the control connection further comprises a third. net valve means (21) arranged to allow the pressure medium from the first half motor (91) to be fed back to the first and second motors (7, 8). ···· '• · • · *** \ # 35 Control circuit according to Claim 1 or 2, characterized in that the multi-capacity motor (10) comprises a first basic connection through which the pressure medium can be fed to the first 117958 hemispherical motor (101) and the second half motor (102). a basic connection to which the pressure medium is transferable from the first half motor (101) and a third basic connection to which the pressure medium is transferable from the second half motor (102). 5 Control circuit according to one of Claims 1 to 3, characterized in that it further comprises second valve means (3) arranged to supply pressure medium jointly to the first and second motor (7, 8) and that the first valve means (18) are alternate. arranged to allow pressure medium from the first half-motor (101) to be supplied to the second valve means (3). Control circuit according to one of claims 1 to 4, characterized in that the first valve members (18) are an internal component with respect to the multi-capacity motor (10). Control circuit according to one of Claims 1 to 5, characterized in that the first motor (7) and the second motor (8) are mechanically coupled to each other for synchronizing the rotation speeds. Control circuit according to one of Claims 1 to 6, characterized in that the first valve members (18) are an external component with respect to the multi-capacitance motor A (10). 25 ί'Υ Control circuit according to one of Claims 1 to 7, characterized in that the total displacement of the half-motors (101, 102) corresponds to that of the third motor (9) and that of the first motor (7) corresponds to that of the second motor (8). -:: * «30 years. ♦ ·· * • · · • · * · 9. Pruning and Shutting the Equipment Pressure Media Control Coupling for the Feeding Elements and Changing their Feed Rate, the control coupling comprising at least: first motor (117); 7) and a second motor (8) connected in parallel and arranged to actuate one or more feed means (11) and whose rotational speeds are connected to one another; 5. a third motor (92) connected to the second motor (8); which is arranged to actuate a feed member O4), characterized in that the control circuit further comprises: 10 - a fourth motor (102) and a fifth motor (101) connected in parallel and whose rotational speeds are coupled to each other and connected with a first motor (7) in series and arranged to drive a supply means (13), and 15. first valve means (18) arranged to allow returning pressure medium from the fifth engine (101) of the ground to the first and second engines (7, 8). The control circuit according to claim 9, characterized in that the control circuit further comprises a sixth motor (91) connected in parallel with the third motor (92), whose rotational speeds are linked to one another and arranged to actuate a supply means (9). 13), and a third valve means (21) arranged to allow the pressure medium from the sixth engine (91) to be fed back to the first and second engines (7, 8). Control circuit according to claim 9 or 10, characterized in that the pressure medium from the fifth motor (101) and the third motor (92) is applied to the second valve means (3). ). :. ·. A control circuit according to any one of claims 9 to 11, characterized in that it further comprises second valve means (3) arranged to supply pressure medium to the first and second motors together. (7, 8), and that the first valve members (18) are alternatively arranged to permit the supply of pressure medium from the fifth motor (101) to the second valve members (3). • · · ♦ * 117958 '' :. 12 Patent claim: