Construction machine

Abstract

An embodiment of the present invention relates to a construction machine including a gyration motor, a boom cylinder, and an arm cylinder, the construction machine including: a main pump unit including a first pump for supplying pressurized oil to the gyration motor, and a second pump for supplying pressurized oil to one or more of the boom cylinder and the arm cylinder; an operation unit that selects a boom priority operation or a turn priority operation so that either the first pump or the second pump operates at a maximum value of the stored horsepower ratio; and a control unit that controls the performance of the remaining pumps, which are not selected by the operation unit, of the first pump and the second pump.

Description

Technical Field

[0001] An embodiment of the present invention relates to an engineering machine, and more particularly to an engineering machine capable of increasing the degree of freedom of the swing speed of a swing body or the height change of a boom by distributing horsepower of a pump according to boom priority or swing priority compared with the prior art. Background Art

[0002] Generally, in a construction machine, a swing body is rotatably supported on an upper portion of a traveling body, and work is performed by operating a boom, an arm, and attachments provided on the swing body.

[0003] The pump receives power generated by the engine and generates pressurized oil, and the construction machine operates by the flow, flow rate, pressure control, etc. of such pressurized oil.

[0004] In the case of a construction machine having a relief hydraulic circuit, it includes a swing pump that supplies pressure oil to a swing motor and a boom pump that can supply pressure oil to a working machine other than the swing motor. The construction machine operates with a fixed horsepower ratio between the swing pump and the boom pump.

[0005] Specifically, even if the horsepower ratio is greatly improved using one of the pumps, there is a problem that the horsepower given to the pump cannot actually drive the pump due to the characteristics of the mechanism that distributes the horsepower.

[0006] In addition, for construction machinery, when the operator selects the swing priority action, if the swing action and the boom raising are performed simultaneously, the supply of hydraulic oil to the boom cylinder will be restricted. Therefore, when the swing body is rotated from 0 degrees to 90 degrees and the boom moves together in a compound action, there is a problem of suppressing the rising height of the boom. Summary of the invention

[0007] Technical issues

[0008] An embodiment of the present invention provides a construction machine capable of improving the degree of freedom of extension of a boom cylinder that is difficult to extend mechanically by distributing the horsepower of a pump.

[0009] Technical Solution

[0010] According to an embodiment of the present invention, a construction machinery includes a swing motor, a boom cylinder, and a stick cylinder, and the construction machinery includes: a main pump unit, which includes a first pump for supplying pressure oil to the swing motor, and a second pump for supplying pressure oil to one or more of the boom cylinder and the stick cylinder; an operating unit, which selects a boom priority action or a swing priority action in a manner that causes one of the first pump and the second pump to operate at a maximum value of a stored horsepower ratio; and a control unit, which controls the performance of the remaining pumps of the first pump and the second pump that are not selected by the operating unit.

[0011] Furthermore, the performance of the pump controlled by the control unit may include the responsiveness of the pump and the control speed of the pump.

[0012] Furthermore, the control unit may store a pattern capable of changing the responsiveness of the pump and the control speed of the pump.

[0013] Additionally, the responsiveness of the pump may include a change in the initial horsepower of the pump.

[0014] Additionally, the controlling speed of the pump may include a change in the rate of increase in horsepower of the pump.

[0015] Furthermore, when the operation unit selects the second pump, the control unit may change the control speed of the pump by changing a pressure command value for controlling the maximum pressure of the first pump.

[0016] Furthermore, the construction machine may further include an information input / output unit that displays a selection state of the mode and receives information for changing a setting of the mode.

[0017] Furthermore, the information input / output unit may change the setting of the horsepower ratio stored in the operation unit.

[0018] Alternatively, according to one embodiment of the present invention, a construction machinery comprises a slewing motor for rotating a slewing body, a boom cylinder for changing the height of a boom supported on the slewing body, and a boom cylinder for changing the angle between a boom supported on the boom and the boom, the construction machinery comprising: a main pump unit, comprising a first pump for supplying pressure oil to the slewing motor, and a second pump for supplying pressure oil to the boom cylinder; an operating unit, which controls the first pump and the second pump at a stored horsepower ratio, thereby selecting one of a boom priority action and a slewing priority action; and a control unit, which controls the second pump at a stored maximum horsepower ratio when the boom priority action is selected by the operating unit, and controls the performance of the first pump to reduce the slewing speed increase rate of the slewing body.

[0019] Furthermore, a plurality of patterns in which the responsiveness of the pump and the control speed of the pump are set differently from each other may be stored in the control unit.

[0020] Furthermore, the control unit may control the performance of the first pump by adjusting a pressure command value.

[0021] Effects of the Invention

[0022] According to the embodiment of the present invention, the construction machine can improve the loading efficiency corresponding to the movement of the boom in the 90-degree rotation state of the swing body by adjusting the initial pressure of the pump and the slope of the increase of the pump torque for controlling the pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A construction machine according to an embodiment of the present invention is shown.

[0024] Figure 2 The structure of a construction machine according to an embodiment of the present invention is shown in a block diagram.

[0025] Figure 3 Mode settings of the control unit according to one embodiment of the present invention are shown.

[0026] Figure 4 and Figure 5 The horsepower ratio of the first pump or the second pump relative to the total horsepower of the main pump section is shown.

[0027] Figures 6 to 9 The following is a diagram showing changes in pressure, horsepower, and speed when a boom raising and a swinging body of a construction machine work together in accordance with changes in the horsepower increase slope of a first pump according to an embodiment of the present invention.

[0028] Fig.10 The initial horsepower of the first pump of one embodiment of the present invention is made variable.

[0029] Figures 11 to 13 The following is a diagram showing changes in pressure and speed when only the rotary body of the working machine performs a swing operation, corresponding to a pressure increase slope or an initial pressure change of the first pump according to an embodiment of the present invention.

[0030] Fig.14 The diagram shows a state in which the gyratory body according to one embodiment of the present invention is rotated 90 degrees.

[0031] Fig.15 The diagram shows the time required for the slewing body to swivel from 0 degrees to 90 degrees and the change in the extension length of the boom cylinder according to the change in the pressure command value according to one embodiment of the present invention. DETAILED DESCRIPTION

[0032] The embodiments of the present invention are described in detail below with reference to the accompanying drawings so that those skilled in the art can easily implement the present invention. The present invention can be implemented in many different forms and is not limited to the embodiments described herein.

[0033] It should be noted that the figures are schematic and not to scale. The relative sizes and proportions of the parts shown in the figures are exaggerated or reduced for clarity and convenience in the figures, and any size is exemplary and not restrictive. In addition, for the same structural elements or components appearing in more than two figures, the same reference numerals are used to reflect similar features.

[0034] The embodiments of the present invention specifically illustrate the ideal embodiments of the present invention. As a result, many variations from the illustrations are contemplated. Therefore, the embodiments are not limited to the specific configurations of the illustrated regions, and may also include variations in configurations caused by manufacturing, for example.

[0035] Refer to the following Figures 1 to 15 A construction machine 101 according to an embodiment of the present invention will be described.

[0036] like Figure 1 As shown, the construction machine 101 includes a swing body 140 , a traveling body 130 , a boom 110 , an arm 120 , a swing motor 230 , a boom cylinder 210 , and an arm cylinder 220 .

[0037] The swing body 140 is rotatably supported by the traveling body 130. The swing motor 230 enables the swing body 140 to swing from the traveling body 130. Specifically, the swing motor 230 operates by receiving pressure oil.

[0038] The boom 110 is supported by the swing body 140. The boom cylinder 210 is extended or contracted by receiving pressure oil to change the height and rotation angle of the boom 110.

[0039] The arm 120 is supported by the boom 110. The arm cylinder 220 is extended or contracted by receiving the pressure oil to change the angle between the boom 110 and the arm 120. In addition, an attachment is provided in a region of the arm 120 that is not supported by the boom 110.

[0040] Therefore, the construction machine 101 performs work by adjusting the height between the ground and the attachment by the swing operation of the swing body 140 and the change of the angle of the boom 110 or the arm 120 .

[0041] like Figure 1 and Figure 2 As shown, the construction machine 101 according to one embodiment of the present invention includes a main pump unit 300, an operation unit 400, and a control unit 500. Specifically, the construction machine 101 can perform overflow control to return a portion of the pressure oil discharged from the main pump unit 300 to the oil tank.

[0042] The main pump unit 300 includes a first pump 310 and a second pump 320. Specifically, the main pump unit 300 generates pressurized oil by operating an engine (not shown). For example, the main pump unit 300 may be an electronic pump.

[0043] The main pump unit 300 supplies pressurized oil to the swing motor 230 , the boom cylinder 210 , and the arm 120 cylinder in order to operate the swing body 140 , the boom 110 , and the arm 120 .

[0044] The main pump unit 300 includes a first pump 310 and a second pump 320. For example, the main pump unit 300 may be an electronic pump.

[0045] The first pump 310 supplies the pressure oil to the swing motor 230 . Alternatively, the first pump 310 may supply the pressure oil to the arm cylinder 220 .

[0046] The second pump 320 may supply pressure oil to the boom cylinder 210. In addition, the second pump 320 may supply pressure oil to the boom cylinder 210 and the arm cylinder 220. The boom cylinder 210 may receive pressure oil from the first pump 310 and the second pump 320.

[0047] The operator operates the operation unit 400. The operator selects the boom priority operation or the swing priority operation through the operation unit 400. The operation unit 400 is set to operate one of the first pump 310 and the second pump 320 at the maximum value of the stored horsepower ratio according to the boom priority operation or the swing priority operation.

[0048] Specifically, when the boom priority operation is selected by the operation part 400 , the second pump 320 may operate at the maximum value of the stored horsepower ratio.

[0049] For example, the second pump 320 may be a boom priority pump.

[0050] Alternatively, when the operation unit 400 selects the swing priority action, the first pump 310 may operate at the maximum value of the stored horsepower ratio. In addition, the first pump 310 may preferentially supply pressure oil to the swing motor 230 or the arm cylinder 220 according to the operation signal of the joystick.

[0051] For example, the first pump 310 may be a swing priority pump or an arm priority pump.

[0052] That is, according to the boom priority operation or the swing priority operation selected by the operator on the operation unit 400 , one of the first pump 310 and the second pump 320 may be operated at the maximum value of the stored horsepower ratio.

[0053] Specifically, when the operation unit 400 selects the boom priority operation, the second pump 320 may operate at the maximum value of the stored horsepower ratio. Alternatively, when the operation unit 400 selects the swing priority operation, the first pump 310 may operate at the maximum value of the stored horsepower ratio.

[0054] like Figure 6 and Figure 5 As shown, the horsepower ratio may be a ratio of the horsepower of the main pump unit 300 operated by the engine to be allocated to the first pump 310 and the second pump 320. Therefore, the horsepower ratio of the total horsepower of the main pump unit 300 operated by the engine to be allocated to the first pump 310 and the second pump 320 is stored according to the boom priority operation or the swing priority operation.

[0055] The control unit 500 may control the performance of the remaining pumps of the first pump 310 or the second pump 320 that are not selected by the operation unit 400. Specifically, when one of the boom priority action and the swing priority action is selected by the operation unit 400, the control unit 500 controls the performance of the remaining pumps, and the pump selected with the selected boom priority action or the selected swing priority action may be controlled to the stored maximum horsepower ratio.

[0056] That is, the construction machine 101 can select the boom priority operation or the swing priority operation through the operation unit 400 to control one of the first pump 310 and the second pump 320 to have the maximum horsepower ratio stored for the selected operation and control the performance of the unselected pumps.

[0057] With this structure, for the construction machine 101 of one embodiment of the present invention, the operator can select the boom priority action or the swing priority action through the operating unit 400. According to the needs of the operator, the height adjustment range of the boom 110 can be increased compared with the previous construction machines, so that the swing body 140 can be swung faster. That is, for the construction machine 101, the operator can select the boom priority action or the swing priority action through the operating unit 400, so that the extension length of the boom cylinder 210 can be extended longer than that of the previous construction machines.

[0058] In addition, the performance of a pump according to an embodiment of the present invention may include the responsiveness 710 of the pump and the control speed 720 of the pump.

[0059] The control part 500 can control the responsiveness 710 of the pump and the control speed 720 of the pump. Specifically, the control part 500 can control the initial horsepower 711 of the pump and the horsepower increase slope 721 of the pump (torque increase slope of the pump).

[0060] The responsiveness 710 of the pump may be controlled by varying the initial horsepower 711 of the pump.

[0061] Specifically, the control unit 500 may control the initial pressure StartP at the initial operation of the pump to control the responsiveness of the pump 710. At this time, the initial pressure StartP of the pump may be a pressure that rises immediately for operating the working machine by the operation signal of the pump. That is, the initial pressure StartP of the pump may be the initial pump pressure when the on signal for operating the pump is output.

[0062] Specifically, Fig.10 As shown, the initial pressure StartP of the second pump 320 may be fixed, and the initial pressure StartP of the first pump 310 may be changed.

[0063] The control speed 720 of the pump may be controlled by changing the horsepower ramp-up slope 721 of the pump.

[0064] The control unit 500 may control the horsepower increase slope 721 of the pump after the initial horsepower 711 of the pump to control the control speed 720 of the pump. That is, the horsepower increase slope 721 of the pump may be the increase slope from the initial pressure StartP of the pump to the target control pressure of the pump. Therefore, the control unit 500 may adjust the acceleration of the control speed 720 of the pump by controlling the pressure increase slope upPrate of the pump.

[0065] That is, in order to address the problem in previous engineering machinery that the pump cannot generate greater horsepower due to horsepower control (limited horsepower of the pump) when the pump is controlled only by controlling the horsepower ratio of the pump, the control unit 500 of the engineering machinery 101 of the present invention can effectively adjust the performance of the pump by adjusting the initial horsepower of the pump and the horsepower rising slope of the pump.

[0066] For example, Figures 6 to 9 , the operation unit 400 selects the boom 110 priority, and the boom 110 is raised and the swing body 140 is swung together. , the control unit 500 operates the second pump 320 at maximum horsepower and controls the performance of the first pump 310.

[0067] Figure 6 7 shows a reference example, which indicates that the first pump 310 and the second pump 320 operate at the same initial pressure StartP and pump horsepower increase slope 721. Specifically, Figure 6 As shown in (a), it means that the second pump 320 is in a state where the initial pressure is StartP200 and the pump pressure rise slope upPrate is set to 500, and the first pump 310 is in a state where the initial pressure StartP is 200 and the pump pressure rise slope upPrate is set to 500.

[0068] When the lifting action of the boom 110 and the swinging action of the swing body 140 are performed together, as shown in FIG. Figure 6 As shown in (e), as indicated on the graph of the angular velocity of the gyratory body 140 (sw spd (deg / s)) and the rising velocity of the boom 110 (bm spd (cm / s)) corresponding to time, it is indicated that the gyratory body 140 needs t to rotate from 0 degrees to 90 degrees. d At this time, the height of the boom 110 is D d .

[0069] In addition, if Figure 6 FIG. 5( d ) shows a graph of the pressure of the first pump 310 ( P1 ) and the pressure of the second pump 320 ( P2 ) corresponding to time.

[0070] In addition, if Figure 6FIG. 5( b ) shows a graph of the horsepower of the first pump 310 (swP) and the horsepower of the second pump 320 (bmP) corresponding to time.

[0071] also, Figure 6 (c) shows the pilot pressure for control of the second boom valve and the swing valve 620 or the first boom valve 610 .

[0072] like Figure 7 As shown in (a), it means that the second pump 320 is in a state where the initial pressure StartP is 200 and the pump pressure rise slope upPrate is set to 500, and the first pump 310 is in a state where the initial pressure StartP is 200 and the pump pressure rise slope upPrate is set to 100.

[0073] Figure 8 As shown in (a), it means that the second pump 320 is in a state where the initial pressure StartP is 200 and the pump pressure rise slope upPrate is set to 500, and the first pump 310 is in a state where the initial pressure StartP is 200 and the pump pressure rise slope upPrate is set to 70.

[0074] like Fig. 9 As shown in (a), the second pump 320 is in a state where the initial pressure StartP is 200 and the pump pressure increase slope upPrate is set to 500, and the first pump 310 is in a state where the initial pressure StartP is 200 and the pump pressure increase slope upPrate is set to 50.

[0075] Compare Figure 6 (b) to Fig. 9 (b), when the operation unit 400 selects the boom priority action so that the second pump 320 works at the maximum horsepower ratio, refer to the arrows in the quadrilateral area of ​​each figure, as shown in Figure 6 (d) to Fig. 9 As shown in (d), it can be seen that for the first pump 310, as the pump pressure rising slope upPrate has a small value, the pressure slope of the first pump 310 corresponding to time becomes gentle.

[0076] At this time, compare Figure 6 (e) to Fig. 9 From (e), it can be seen that the swing time from 0 degrees to 90 degrees of the swing body 140 tends to increase, and the rising length of the boom 110 increases.

[0077] Specifically, it is indicated that the rotation time required for the gyration body 140 to rotate from 0 degrees to 90 degrees is t d >t1>t3>t2. At this time, it means that the extension length of the boom 110 is D3>D2>D1>Dd .

[0078] Therefore, as the pressure increase slope upPrate of the first pump 310 is set lower than before, the rotation speed of the slewing body 140 from 0 to 90 degrees tends to decrease. In addition, it is shown that the extension length of the boom cylinder 210 is increased.

[0079] In addition, comparison Figure 6 d to Fig. 9 d. It can be seen that as the horsepower rising slope of the first pump 310 becomes relatively lower, the rising slope of the pump pressure of the first pump 310 also becomes lower.

[0080] Accordingly, if Figure 1 and Figures 6 to 9 As shown, when the operation unit 400 selects the boom 110 priority, and the boom 110 rises and the swinging of the swing body 140 is performed together, it can be seen that as the horsepower rising slope of the first pump 310 is set low, the pressure rising slope of the first pump 310 becomes low, so that the swinging action of the swing body 140 becomes slower. At this time, it can be seen that the extension length of the boom cylinder 210 is also increased. That is, the horsepower ratio of the second pump 320 works at the maximum, and the performance of the first pump 310 can be controlled, so that the degree of freedom of the extension change of the boom cylinder 210 is increased, and the swing speed ratio of the swing body 140 can be smoothly changed compared with the past.

[0081] In addition, if Figures 2 to 3 As shown, the control unit 500 of one embodiment of the present invention may store a pattern 510 capable of changing the responsiveness 710 of the pump and the control speed 720 of the pump.

[0082] The control unit 500 may store a mode 510 that allows an operator to change settings of the pump responsiveness 710 and the pump control speed 720 .

[0083] Specifically, the control unit 500 may store a plurality of patterns 510 having different pump responsiveness 710 or different pump control speeds 720 .

[0084] The operator can select any one of the plurality of modes 510 , or the operator can change the settings of the pump responsiveness 710 or the pump control speed 720 stored in the mode 510 .

[0085] Therefore, in the construction machine 101, since the control unit 500 is set with the plurality of modes 510 capable of controlling the performance of the pump, it is possible to perform work by applying the adjustment of the performance level of the pump in a variety of ways.

[0086] In addition, if Figure 3As shown, the engineering machine 101 according to an embodiment of the present invention may further include an information input and output unit 700 .

[0087] The information input and output unit 700 may be provided in the operator's cab of the revolving body 140 to display the selection status information of the mode 510 to the operator.

[0088] Furthermore, the information input / output unit 700 may receive information for changing the setting of the pump responsiveness 710 or the pump control speed 720 in the mode 510 from the operator.

[0089] Specifically, the information input and output unit 700 may display the responsiveness 710 of the pump or the control speed 720 of the pump in multiple stages so that the operator can easily recognize them.

[0090] Alternatively, the information input and output unit 700 may digitally display the pump responsiveness 710 or the pump control speed 720 so that the operator can easily recognize them.

[0091] For example, the information input and output unit 700 may be formed as a touch panel. Alternatively, the information input and output unit 700 may be a dashboard.

[0092] Furthermore, the information input / output unit 700 according to an embodiment of the present invention can guide the operator to change the setting of the horsepower ratio stored in the operation unit 400 .

[0093] The operator can change the setting of the horsepower ratio between the first pump 310 and the second pump 320 corresponding to the boom priority operation or the swing priority operation when operating the operation unit 400 through the information input and output unit 700 .

[0094] The horsepower ratio of the first pump 310 and the second pump 320 corresponding to the boom priority operation or the swing priority operation changed in this way is reset so that when the operator selects the operation unit 400 , the first pump 310 and the second pump 320 can be operated at the changed horsepower ratio.

[0095] For example, when the operation unit 400 is selected as the boom priority operation, the stored horsepower ratio of the first pump 310 to the second pump 320 may be controlled to be a ratio of 3: 7. At this time, the second pump 320 may be controlled at 7 as the maximum horsepower ratio.

[0096] Alternatively, when the operation unit 400 is selected as the swing priority operation, the stored horsepower ratio of the first pump 310 to the second pump 320 may be controlled to be 5: 5. At this time, the first pump 310 may be controlled at 5, which is the maximum horsepower ratio.

[0097] The operator can change the setting of the horsepower ratio between the first pump 310 and the second pump 320 corresponding to the boom priority operation or the swing priority operation through the information input and output unit 700 .

[0098] Thereafter, according to the selection of the boom priority operation or the boom swing operation by the operation unit 400 , the first pump 310 and the second pump 320 may be controlled based on the horsepower ratio of the first pump 310 and the second pump 320 stored in the change setting.

[0099] In addition, if Figure 2 and Figures 11 to 13 As shown, the engineering machine 101 according to an embodiment of the present invention further includes a pump pressure sensor 900 .

[0100] The pump pressure sensor 900 may detect the pressure of the main pump unit 300. Specifically, the pump pressure sensor 900 may detect the pressure of the pressure oil discharged from the first pump 310. In addition, the pressure information of the pressure oil discharged from the first pump 310 detected by the pump pressure sensor 900 may be transmitted to the control unit 500.

[0101] The pressure of the hydraulic oil discharged from the first pump 310 can be maintained so that the pressure of the hydraulic oil does not exceed the pressure command value SWcmd when supplied to the gyro motor 230. The control unit 500 can change the pressure command value SWcmd.

[0102] That is, the control unit 500 can maintain the pressure of the working oil toward the swing motor 230 without exceeding the pressure command value SWcmd by changing the pressure command value SWcmd. In addition, the control unit 500 can confirm the state information of the pressure discharged from the first pump 310 based on the pressure information of the pressure oil received from the pump pressure sensor 900. That is, the control unit 500 can adjust and change the pressure command value SWcmd for swing acceleration by the pressure information detected by the pump pressure sensor 900. In other words, the pressure command value SWcmd formed in the main pump unit 300 can be adjusted to variably form the swing acceleration of the construction machine 101.

[0103] At this time, the pressure command value SWcmd of the first pump 310 may be a slewing pressure reduction pressure. That is, the maximum pressure to be output by the first pump 310 may be controlled by controlling the pressure command value SWcmd by the control unit 500. In addition, the control unit 500 may confirm the pressure control state currently outputted from the first pump 310 based on information from the pump pressure sensor 900 that detects output pressure information of the first pump 310.

[0104] Therefore, the pressure command value SWcmd of the control unit 500 is the pressure that the first pump 310 should maintain after the initial horsepower 711 of the pump on the pressure line diagram of the first pump 310 corresponding to time. Specifically, the control unit 500 can control the maximum value of the pressure that the first pump 310 should maintain through the pressure command value SWcmd. Accordingly, the control unit 500 can adjust the acceleration slope of the first pump 310 by adjusting the pressure command value SWcmd, the pressure rise slope upPrate, and the initial pressure StartP of the pump. Through the pressure command value SWsmd adjusted by the control unit 500, the performance of the pump can be controlled so that the gyration acceleration of the gyration body 140 is variable.

[0105] That is, the control unit 500 controls the pressure command value SWcmd to determine the maximum pressure value to be maintained by the first pump 310 and adjust the rotation speed of the gyratory body 140 corresponding to the pump horsepower pressure increase slope upPrate toward the maximum pressure value.

[0106] Accordingly, the time required for the gyratory body 140 of the construction machine 101 to rotate from 0 degrees to 90 degrees can be adjusted.

[0107] In other words, the control portion 500 may adjust the horsepower increase slope 721 of the first pump 310 by controlling the discharge pressure of the first pump 310 .

[0108] Alternatively, the engineering machine 101 according to an embodiment of the present invention may further include a swing pressure reducing valve 800 .

[0109] The swing pressure reducing valve 800 can selectively open and close the flow path so that the pressure of the pressurized oil discharged from the first pump 310 does not exceed the pressure command value of the working oil when it is supplied to the swing motor 230. That is, the swing pressure reducing valve 800 can change the swing acceleration by variably controlling the pressure command value through the control unit 500.

[0110] Figures 11 to 13 The case where only the rotation of the gyratory body 140 is performed without the operation of the boom 110 is shown.

[0111] like Fig.11 As shown, Fig.11 (a) shows the pressure change of the first pump 310 corresponding to time when the pressure command value SWcmd is set to 300, the initial pressure StartP of the pump is set to 200, and the pressure increase slope swrate of the pump is set to 500.

[0112] like Fig.12 As shown, Fig.12(a) shows the pressure change of the first pump 310 corresponding to time when the pressure command value SWcmd is set to 300, the initial pressure StartP of the pump is set to 200, and the pressure increase slope swrate of the pump is set to 50.

[0113] like Fig.13 13( a ) shows the pressure change of the first pump 310 corresponding to time when the pressure command value SWcmd is set to 300, the initial pressure StartP of the pump is set to 150, and the pressure increase slope swrate of the pump is set to 70.

[0114] Therefore, it can be seen that Fig.12 (a) and Fig.13 (a) The pressure rise slope ratio of the first pump 310 is Fig.11 That is, when the pressure rise slope of the first pump 310 is gentle, it can be known that Fig.11 The time required for the gyratory body 140 of the first pump 310 to rotate from 0 to 90 degrees in (a) is Fig.11 (b) and Fig.12 The time required for the gyratory body 140 of the first pump 310 of (b) is longer.

[0115] Specifically, Fig.11 b to Fig.13 As shown in b, the time required for the gyro 140 to rotate from 0 degrees to 90 degrees is t sd <ts1<ts2。

[0116] The control unit 500 can control the pressure increase slope of the first pump 310 by adjusting the pressure command value SWcmd so that the discharge pressure of the first pump 310 is maintained at the set pressure. Accordingly, the construction machine 101 can control the swing acceleration.

[0117] Refer to the following Figures 1 to 15 The working process of the construction machine 101 according to an embodiment of the present invention is described.

[0118] The operator determines whether boom priority action or swing priority action is required according to the needs.

[0119] When the operation unit 400 is operated to select the boom priority, the control unit 500 operates the second pump 320 at the set maximum horsepower. In other words, the control unit 500 operates the second pump 320 at the maximum horsepower.

[0120] The control unit 500 controls the performance of the first pump 310. Specifically, the control unit 500 controls the performance of the first pump 310 in the mode 510 selected by the operator. Figure 2 and Figure 3As shown, a plurality of modes 510 are set and stored in the control unit 500, and such settings can be changed by an operator.

[0121] That is, the control unit 500 controls the initial pressure StartP of the first pump 310 and the horsepower increase slope 721 of the pump in the selected mode 510 .

[0122] Specifically, the control portion 500 may control the horsepower increase slope 721 of the first pump 310 by controlling the pressure command value SWcmd.

[0123] At this time, the operator operates the boom by operating the joystick, and according to the signal, the pressure oil of the second pump 320 operating at the maximum horsepower is transmitted to the boom cylinder 210. In addition, the operator operates the joystick to make the swing body 140 also swing, and operates the first pump 310 in a state where the swing horsepower rising slope is limited, so that the swing speed of the swing body 140 can be formed slowly.

[0124] The control unit 500 may adjust the horsepower ratio of the first pump 310 and the second pump 320 according to the selection of the operation unit 400 and the mode 510 selected and stored by the operator.

[0125] The control part 500 controls the main control valve 600 to supply the pressure oil of the main pump part 300. Specifically, the control part 500 may receive information of the joystick and control the first boom valve 610 to supply the pressure oil to the boom cylinder 210, or control the second boom valve or the swing valve 620 to supply the pressure oil to the boom cylinder 210 or the swing motor 230.

[0126] Therefore, according to the information selected by the operation unit 400, the control unit 500 can perform a swing priority or a boom priority operation.

[0127] In this case, if Fig.14 and Fig.15 As shown, when the swing body 140 is moved from a rotation angle of 0 degrees to 90 degrees and the boom 110 is also operated, the degree of freedom in adjusting the height of the boom can be formed larger than the previous default. Specifically, it can be seen that the extension length of the boom cylinder 210 when the swing body 140 is at 90 degrees is improved compared to the past.

[0128] Specifically, Fig.15 As shown, with the starting point StartP of the first pump 310 fixed, as the pressure command value SWcmd of the control unit 500 changes, when the swing body 140 rotates to 90 degrees, the height of the boom 110, that is, the extension length of the boom cylinder 210 can be changed.

[0129] That is, as the pressure command value SWcmd of the control portion 500 changes, the horsepower increase slope 721 of the first pump 310 can be changed, and the degree of freedom of the extension length of the corresponding boom cylinder 210 can be changed.

[0130] Through this structure, the engineering machine 101 of one embodiment of the present invention can improve the efficiency of loading by adjusting the height of the boom 110 when the swing body 140 rotates 90 degrees. Specifically, when the swing body 140 rotates 90 degrees, the height adjustment range between the boom and the ground is increased compared to the past, thereby improving the efficiency of loading using the boom.

[0131] Although the embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art should understand that the present invention can be implemented in other specific forms without changing its technical concept or essential features.

[0132] Therefore, the embodiments described above should be understood as being illustrative and non-restrictive in all aspects. The scope of the present invention is reflected in the claims described below. All changes or deformations derived from the meaning, scope and equivalent concepts of the claims should be interpreted as falling within the scope of the present invention.

[0133] Industrial Applicability

[0134] The construction machine according to an embodiment of the present invention can increase the degree of freedom of extension of a boom cylinder that is difficult to extend mechanically by distributing the horsepower of a pump.

[0135] Reference numerals

[0136] 101: construction machinery, 110: boom, 120: arm, 140: swing body, 210: boom cylinder, 220: arm cylinder, 230: swing motor, 300: main pump unit, 310: first pump, 320: second pump, 400: operating unit, 500: control unit, 510: mode, 700: information input and output unit, 710: responsiveness of the pump, 711: initial horsepower of the pump, 720: control speed of the pump, 721: horsepower rising slope of the pump, 900: pump pressure sensor, SWcmd: pressure command value.

Claims

1. An engineering machine, comprising a slewing motor, a boom cylinder, and an arm cylinder, wherein the engineering machine is characterized in that it comprises: a main pump unit including a first pump for supplying pressure oil to the swing motor, and a second pump for supplying pressure oil to at least one of the boom cylinder and the arm cylinder; an operating unit for selecting a boom priority operation or a swing priority operation in such a manner that one of the first pump and the second pump operates at a maximum value of the stored horsepower ratio; as well as A control unit controls performance of the remaining pumps of the first pump and the second pump that are not selected by the operation unit.

2. The construction machinery according to claim 1, characterized in that: The performance of the pump controlled by the control unit includes the responsiveness of the pump and the control speed of the pump.

3. The construction machinery according to claim 2, characterized in that: The control unit stores a pattern capable of changing the responsiveness of the pump and the control speed of the pump.

4. The construction machine according to claim 3, characterized in that: The pump responsiveness includes changes in the initial horsepower of the pump.

5. The construction machine according to claim 3, characterized in that: The control speed of the pump includes a change in the pump horsepower ramp-up slope.

6. The construction machine according to claim 3, characterized in that: When the operation unit selects the second pump, the control unit changes the control speed of the pump by changing a pressure command value for controlling the maximum pressure of the first pump.

7. The construction machine according to claim 3, characterized in that: The device further includes an information input / output unit that displays a selected state of the mode and receives information for changing settings of the mode.

8. The construction machine according to claim 7, characterized in that: The information input / output unit is capable of changing a setting of the horsepower ratio stored in the operation unit.

9. An engineering machine comprising a slewing motor for rotating a slewing body, a boom cylinder for changing the height of a boom supported on the slewing body, and an arm cylinder for changing the angle between an arm supported on the boom and the boom, wherein the engineering machine comprises: a main pump unit including a first pump for supplying pressure oil to the swing motor and a second pump for supplying pressure oil to the boom cylinder; an operating unit for controlling the first pump and the second pump at a stored horsepower ratio to select one of a boom priority operation and a swing priority operation; as well as The control unit controls the second pump at the stored maximum horsepower ratio and controls the performance of the first pump so as to reduce the swing speed increase rate of the swing body when the boom priority operation is selected by the operation unit.

10. The construction machine according to claim 9, characterized in that: The control unit stores a plurality of patterns in which the responsiveness of the pump and the control speed of the pump are set differently from each other.

11. The construction machine according to claim 10, characterized in that: The control unit is capable of controlling the performance of the first pump by adjusting a pressure command value.

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