阅读说明：本技术 一种属具流量调节系统及挖掘机 (Generic tool flow adjusting system and excavator ) 是由 赵景东 唐博 王泽林 王子燕 卢春霖 李飞 乔玉钢 于 2021-07-28 设计创作，主要内容包括：本发明属于工程机械技术领域,公开了一种属具流量调节系统及挖掘机。该属具流量调节系统包括调节旋钮、手柄、显示控制器、电磁阀组及液压系统,显示控制器的输入端分别电连接于调节旋钮和手柄,显示控制器的输出端电连接于电磁阀组,电磁阀组通过液压系统分别选择性连通于任意属具,通过调节调节旋钮和手柄,使显示控制器能够调节电磁阀组的阀芯开度,用于属具的无级流量调节。该属具流量调节系统在调节调节旋钮和手柄的共同作用,增加了属具无级流量调节的范围,能够满足不同类型属具流量的需要,通用性较强,在保证属具流量的充足的同时,还不会产生过多的能源浪费,降低生产成本。(The invention belongs to the technical field of engineering machinery and discloses a flow regulating system and an excavator. The accessory flow adjusting system comprises an adjusting knob, a handle, a display controller, an electromagnetic valve group and a hydraulic system, wherein the input end of the display controller is electrically connected with the adjusting knob and the handle respectively, the output end of the display controller is electrically connected with the electromagnetic valve group, the electromagnetic valve group is selectively communicated with any accessory through the hydraulic system respectively, and the display controller can adjust the valve core opening of the electromagnetic valve group through adjusting the adjusting knob and the handle and is used for stepless flow adjustment of the accessory. The accessory flow adjusting system has the advantages that under the combined action of the adjusting knob and the handle, the range of stepless flow adjustment of accessories is enlarged, the requirements of different types of accessory flows can be met, the universality is high, the sufficiency of the accessory flows is ensured, excessive energy waste is avoided, and the production cost is reduced.)

1. The utility model provides a belong to utensil flow control system, characterized in that, including adjust knob (1), handle (2), display controller (3), electromagnetism valves (4) and hydraulic system (5), the input of display controller (3) is connected in respectively the electricity adjust knob (1) with handle (2), the output electricity of display controller (3) is connected in electromagnetism valves (4), electromagnetism valves (4) pass through hydraulic system (5) selective intercommunication in arbitrary accessory, through adjusting adjust knob (1) with slider (21) of handle (2), make display controller (3) can adjust the aperture case of electromagnetism valves (4) for the stepless flow control of accessory.

2. Accessory flow regulation system according to claim 1, characterized in that the display controller (3) and the adjustment knob (1) are of an integrally formed structure.

3. Accessory flow regulating system according to claim 1, characterized in that a rheostat is arranged inside the regulating knob (1), the maximum output current of the solenoid valve block (4) being adjustable by adjusting the actual resistance value of the rheostat.

4. Accessory flow regulating system according to claim 3, characterized In that the maximum output current of the set of solenoid valves (4) and the actual resistance value of the rheostat satisfy I1 ═ In (R/Rmax), where I1 is the maximum output current of the set of solenoid valves (4), In is the rated current of the set of solenoid valves (4), R is the actual resistance value of the rheostat, Rmax is the maximum resistance value of the rheostat.

5. Accessory flow regulating system according to claim 4, characterized in that the slider (21) is slidably arranged in the handle (2), the actual output current of the solenoid valve block (4) being adjustable by adjusting the position of the slider (21) with respect to the handle (2).

6. Accessory flow regulation system according to claim 5 characterized in that the actual output current of the solenoid valve pack (4) and the actual voltage of the handle (2) corresponding to the current position of the slider (21) satisfy I2 ═ I1 ═ V/Vmax, where I2 is the actual output current of the solenoid valve pack (4), V is the actual voltage of the handle (2) corresponding to the current position of the slider (21) and Vmax is the maximum voltage of the handle (2).

7. The accessory flow regulating system according to claim 5, wherein the number of the handles (2) is plural, and a plurality of the sliders (21) are provided on the plural handles (2) in one-to-one correspondence.

8. Accessory flow regulation system according to claim 1, characterized in that the hydraulic system (5) comprises a main pump (51), a tank (52) and a hydraulic line (53), the main pump (51) being in communication with the tank (52) through the hydraulic line (53), the hydraulic line (53) being in communication with the solenoid valve group (4) and the accessory, respectively.

9. Accessory flow regulation system according to claim 8, characterized in that a main valve (54) is provided on the hydraulic line (53).

10. An excavator comprising an accessory and the accessory flow regulation system of any one of claims 1 to 9, the accessory flow regulation system being selectively communicable with the accessory for stepless flow regulation of the accessory.

Technical Field

The invention relates to the technical field of engineering machinery, in particular to a flow regulating system and an excavator.

Background

The excavator is widely applied to engineering machinery, and can adapt to various working conditions during operation, so that different accessories are required to be installed to meet operation requirements under various working conditions. The accessory specifically comprises a side inclined bucket, a grass grabbing machine, a pipe grabbing machine, a sliding tooth wood grabbing machine, a tooth aligning wood grabbing machine and the like. Because the flow required by different accessories is different, if the accessories are operated by always utilizing fixed larger flow, when the accessory requires smaller flow, the engine still needs to provide larger power and wastes fuel oil, so that the production cost is higher, and the large flow can also impact a hydraulic element, thereby reducing the service life of the hydraulic element.

In order to solve the problem, the existing excavator accessory flow regulation has the following two modes:

firstly, an operator adjusts the flow rate by controlling a display screen of a display, but the operator can only select a first-stage gear, a second-stage gear and other modes displayed by the display screen, namely the adjustment of the flow rate of the accessory is staged, and the stepless adjustment of the flow rate of the accessory cannot be realized;

and secondly, the external flow adjusting knob, the display and the controller jointly form adjusting control, and the controller is used for matching a hydraulic system through a hardware system and a software system, so that the flow of the accessory is adjusted, and although the stepless adjustment of the flow of the accessory can be realized in a certain range, the stepless flow adjusting range is small, and the diversified requirements of users cannot be met. Meanwhile, the adjusting knob, the display and the controller are of split structures, so that the number of parts is too large, the occupied space is large, the operation mode is complex, and the production cost is high.

Disclosure of Invention

The invention aims to provide an attachment flow regulating system and an excavator, which can improve the range of stepless flow regulation of the attachment and save the production cost.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a belong to utensil flow control system, includes adjust knob, handle, display controller, electromagnetism valves and hydraulic system, the input of display controller electricity respectively connect in adjust knob with the handle, the output electricity of display controller is connected in electromagnetism valves, electromagnetism valves passes through hydraulic system selective intercommunication in arbitrary accessory, through adjusting adjust knob with the handle, make display controller can adjust the case aperture of electromagnetism valves for the stepless flow control of accessory.

Preferably, the display controller and the adjusting knob are of an integrally formed structure.

Preferably, a rheostat is provided inside the adjustment knob, and the maximum output current of the solenoid valve group can be adjusted by adjusting an actual resistance value of the rheostat.

Preferably, the maximum output current of the solenoid valve block and the actual resistance value of the rheostat satisfy I1 ═ In (R/Rmax), where I1 is the maximum output current of the solenoid valve block, In is the rated current of the solenoid valve block, R is the actual resistance value of the rheostat, and Rmax is the maximum resistance value of the rheostat.

Preferably, a slider is slidably provided in the handle, and the actual output current of the solenoid valve group can be adjusted by adjusting the position of the slider with respect to the handle.

Preferably, the actual output current of the solenoid valve set and the actual voltage of the handle corresponding to the current position of the slider satisfy I2 ═ I1 × (V/Vmax), where I2 is the actual output current of the solenoid valve set, V is the actual voltage of the handle corresponding to the current position of the slider, and Vmax is the maximum voltage of the handle.

Preferably, the number of the handles is multiple, and the plurality of the handles are provided with the plurality of the sliding blocks in a one-to-one correspondence manner.

Preferably, the hydraulic system comprises a main pump, an oil tank and a hydraulic pipeline, the main pump is communicated with the oil tank through the hydraulic pipeline, and the hydraulic pipeline is respectively communicated with the electromagnetic valve group and the accessory.

Preferably, a main valve is provided in the hydraulic line.

In order to achieve the purpose, the invention further provides an excavator, which comprises an accessory and the accessory flow regulating system, wherein the accessory flow regulating system can be selectively communicated with the accessory and is used for stepless flow regulation of the accessory.

The invention has the beneficial effects that:

according to the accessory flow regulating system provided by the invention, the display controller is used for displaying and controlling, and the function integration of the display and the controller is realized. The input of display controller is connected in adjust knob and handle respectively, and the display controller is used for gathering adjust knob's information and the information of handle, and the output electricity of display controller is connected in the electromagnetism valves, and according to adjust knob's information and the information of handle, the display controller adjusts the case aperture of electromagnetism valves, and the electromagnetism valves is responsible for the size of control accessory flow. The adjusting knob is screwed for primary stepless flow regulation, and the control handle is used for secondary stepless flow regulation. Under the combined action of the adjusting knob and the handle, the range of stepless flow adjustment of the accessories is enlarged, the requirements of the flow of the accessories of different types can be met, the universality is stronger, the sufficient flow of the accessories is ensured, meanwhile, excessive energy waste is avoided, and the production cost is reduced.

The invention also provides an excavator, which comprises an accessory and the accessory flow regulating system, wherein the accessory flow regulating system can be selectively communicated with the accessory and is used for stepless flow regulation of the accessory. The accessory flow regulating system has the advantages of simple and compact structure, convenience in arrangement on the excavator, lower production cost, benefit for batch popularization and use and the like.

Drawings

FIG. 1 is a system diagram of an accessory flow regulation system of the present invention;

FIG. 2 is a schematic structural diagram of an accessory flow regulation system of the present invention;

FIG. 3 is a schematic diagram of the operation of the accessory flow control system of the present invention.

Detailed Description

In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

Aiming at different working conditions and operation types, the excavator needs to replace different accessories during working, and the required power is different due to different types of the accessories. If the accessory is controlled by adopting a fixed flow, when the flow required by the accessory is small, the engine still needs to provide large power, energy waste is caused, and the production cost is high.

To solve this problem, the present embodiment provides an accessory flow rate adjustment system for adjusting the flow rate of an accessory. As shown in fig. 1, the accessory flow rate adjusting system includes a control unit, a solenoid valve set 4 and a hydraulic system 5, the control unit is electrically connected to the solenoid valve set 4, the solenoid valve set 4 is selectively communicated with any one of the accessories through the hydraulic system 5, it can be understood that when one accessory is replaced, the original accessory is firstly detached from the excavator body, then the new accessory is installed on the excavator body, and the new accessory is communicated with the hydraulic system 5. The opening of the valve core of the electromagnetic valve group 4 is controlled by the control unit, and the electromagnetic valve group 4 is communicated with an accessory through the hydraulic system 5, so that the flow of the accessory is adjusted.

The existing control unit comprises a display and a controller, wherein the controller is electrically connected with the display and an electromagnetic valve respectively, the display is used for flow gear selection and flow numerical value display, or the control unit replaces the display with a flow adjusting knob, and the controller performs stepless flow adjustment on the accessory by screwing the flow adjusting knob, but the stepless flow adjustment range is smaller.

In order to solve this problem, as shown in fig. 2, the control unit provided in this embodiment includes an adjusting knob 1, a handle 2, and a display controller 3, wherein an input end of the display controller 3 is electrically connected to the adjusting knob 1 and the handle 2, respectively, and an output end of the display controller 3 is electrically connected to the solenoid valve set 4. The display controller 3 is responsible for showing and controlling, and the input of display controller 3 is the signal acquisition end for gather adjust knob 1 and handle 2's control information, the output of display controller 3 is current output module, for solenoid valve group 4 provides control current. The display controller 3 can adjust the valve core opening of the electromagnetic valve group 4 by adjusting the adjusting knob 1 and the handle 2, and is used for stepless flow regulation of accessories.

In the accessory flow rate adjustment system provided by this embodiment, the display controller 3 is used for displaying and controlling, and functions of the display and the controller are integrated. The input of display controller 3 is connected in adjust knob 1 and handle 2 respectively in electricity, and display controller 3 is used for gathering adjust knob 1's information and handle 2's information, and display controller 3's output electricity is connected in solenoid valve group 4, and according to adjust knob 1's information and handle 2's information, display controller 3 adjusts solenoid valve group 4's case aperture, and solenoid valve group 4 is responsible for the size of control accessory flow. The adjusting knob 1 is screwed for primary stepless flow regulation, and the control handle 2 is used for secondary stepless flow regulation. Under the combined action of the adjusting knob 1 and the handle 2, the range of stepless accessory flow adjustment is enlarged, the requirements of different types of accessory flows can be met, the universality is high, the sufficient accessory flows are ensured, excessive energy waste is avoided, and the production cost is reduced.

It should be noted that when the accessory is required to be operated, the handle can also control the valve core to be opened.

Further, as shown in fig. 2, the hydraulic system 5 includes a main pump 51, an oil tank 52, and a hydraulic line 53 that communicate with each other, and the hydraulic line 53 communicates with the solenoid valve group 4 and the accessories, respectively. The oil tank 52 is used to store hydraulic oil, the main pump 51 can draw hydraulic oil from the oil tank 52 and deliver it to the hydraulic line 53, and then the hydraulic line 53 delivers the hydraulic oil into the accessory, thereby powering the accessory. The hydraulic line 53 is provided with a main valve 54, and the main valve 54 is used for controlling opening and closing of the hydraulic line 53 and plays a role of central control.

The electromagnetic valve group 4 is electrically connected to the display controller 3 through a wire harness, and the electromagnetic valve group 4 is used for adjusting the flow of the accessory. The electromagnetic valve group 4 includes a first proportional electromagnetic valve 41, a second proportional electromagnetic valve 42, a third proportional electromagnetic valve 43, and a fourth proportional electromagnetic valve 44, and the four proportional electromagnetic valves control the size of the valve core opening according to the size of the input current, so as to adjust the accessory flow.

Because the display, the controller and the flow adjusting knob in the existing control unit are of a split structure, the number of parts is large, and the occupied space is large. To solve this problem, as shown in fig. 2, the display controller 3 and the adjustment knob 1 are integrally formed. Specifically, the adjusting knob 1 is arranged below the display controller 3, and the display controller 3 integrates the functions of the display and the controller, so that the integration of the three functions of display, control and adjustment is realized by directly arranging the adjusting knob 1 on the display controller 3. In this way, the display controller 3 is an integral module, the structure is compact, the occupied space is small, the links of part assembly are reduced, and the production cost is reduced.

Optionally, the number of the adjusting knobs 1 is two, the two adjusting knobs 1 are arranged in parallel at intervals, and the two adjusting knobs 1 have the same structure. It will be appreciated that either one of the adjustment knobs 1 may be screwed or both adjustment knobs 1 may be screwed simultaneously, further increasing the range of stepless flow regulation.

Specifically, the adjustment knob 1 includes a rheostat and a connection harness connected to an acquisition circuit of the display controller 3. A rheostat is arranged inside the adjusting knob 1, and when the adjusting knob 1 is screwed, the resistance of the rheostat can be changed. By adjusting the actual resistance value of the varistor, the maximum output current of the solenoid valve block 4 can be adjusted.

The input end of the display controller 3 is a signal acquisition end, the signal acquisition end acquires the actual resistance value of the rheostat in real time, the software program is used for calculating the output current corresponding to different resistance values, the current is output to the electromagnetic valve group 4 through the current output module, the opening size of the corresponding electromagnetic valve group 4 is changed, the accessory flow is further changed, and the adjustment of the maximum accessory flow is realized. Since the actual resistance value of the varistor can be adjusted steplessly, a stepless adjustment of the corresponding output current is also achieved.

Specifically, the following relationship is satisfied between the actual resistance value of the varistor and the maximum output current of the solenoid valve group 4: i1 is In (R/Rmax), where I1 is the maximum output current of the solenoid valve group 4, In is the rated current of the solenoid valve group 4, R is the actual resistance value of the varistor, and Rmax is the maximum resistance value of the varistor.

It can be understood that the rated current In of the solenoid valve group 4 is a value inherent to the solenoid valve group 4 when it is shipped, and the maximum resistance value Rmax of the rheostat is a value inherent to the adjustment knob 1 when it is shipped. By screwing the adjusting knob 1, the actual resistance value R of the rheostat is changed, so that the maximum output current I1 of the solenoid valve set 4 is obtained.

Further, a slider 21 is slidably provided in the handle 2, and the actual output current of the solenoid valve group 4 can be adjusted by adjusting the position of the slider 21 with respect to the handle 2. Wherein, the signal of the slider 21 movement is connected to the signal acquisition circuit of the display by the wire harness.

Specifically, the position of the slider 21 in the handle 2 is divided into three working positions, i.e., a middle position, a left position and a right position, if the accessory of the excavator does not need to be moved, the working position of the slider 21 in the control handle 2 is the middle position, the output end of the display controller 3, i.e., the current output module, does not output current, and the solenoid valve group 4 does not move. If the accessory of the excavator needs to act, the working position of the sliding block 21 in the control handle 2 is a left position or a right position, the output end of the display controller 3, namely the current output module outputs current to the corresponding solenoid valve group 4, and the valve core of the solenoid valve group 4 moves to change the opening of the valve core so as to flow the hydraulic oil medium in the hydraulic system 5 to the accessory, thereby pushing the accessory to work. Since the position of the slide 21 relative to the handle 2 is adjustable, stepless adjustment is possible, so that stepless adjustment of the actual output current of the solenoid valve group 4 is also achieved.

Specifically, the actual voltage of the handle 2 corresponding to the current position of the slider 21 and the actual output current of the solenoid valve group 4 are related to each other, and then the actual output current of the solenoid valve group 4 and the actual voltage of the handle 2 corresponding to the current position of the slider 21 satisfy I2 ═ I1 (V/Vmax), where I2 is the actual output current of the solenoid valve group 4, V is the actual voltage of the handle 2 corresponding to the current position of the slider 21, and Vmax is the maximum voltage of the handle 2.

It is understood that the maximum voltage Vmax of the handle 2 is an inherent value of the handle 2 at the time of factory shipment. By controlling the switching of the working position of the slide block 21, the actual voltage V of the handle 2 corresponding to the current position of the slide block 21 is changed, so that the actual output current I2 of the solenoid valve bank 4 is obtained.

Optionally, the number of the handles 2 is multiple, the multiple handles 2 are arranged in parallel at intervals, and the multiple handles 2 have the same structure. A plurality of sliders 21 are correspondingly arranged on the plurality of handles 2 one by one. It can be understood that, in this embodiment, the number of the handles 2 is preferably two, the specific number of the handles can be adjusted according to actual production requirements, and any one handle 2 or two handles 2 can be operated simultaneously, so as to further improve the range of stepless flow rate regulation.

As shown in fig. 3, when the accessory of the excavator needs to work, if the flow rate of the accessory needs to be adjusted, the working process of the accessory flow rate adjustment system provided by the embodiment is as follows:

s1, screwing the adjusting knob 1;

s2, the display controller 3 acquires the actual resistance value R of the rheostat in the adjusting knob 1;

s3, according to the actual resistance value R of the rheostat, the display controller 3 calculates the maximum output current I1 of the solenoid valve group 4;

s4, adjusting the position of the slide block 21 relative to the handle 2;

s5, the display controller 3 collects the actual voltage V of the handle 2 corresponding to the current position of the slide block 21;

s6, calculating the actual output current I2 of the solenoid valve group 4 by the display controller 3 according to the maximum output current I1 of the solenoid valve group 4 and the actual voltage V of the handle 2 corresponding to the current position of the slide block 21;

s7, changing the valve core opening of the electromagnetic valve group 4 according to the actual output current I2;

and S8, stepless flow regulation of accessories.

The embodiment also provides an excavator, which comprises an accessory and the accessory flow regulating system, wherein the accessory flow regulating system can be selectively communicated with the accessory and is used for stepless flow regulation of the accessory. The accessory flow regulating system has the advantages of simple and compact structure, convenience in arrangement on the excavator, lower production cost, benefit for batch popularization and use and the like.

In the description herein, it is to be understood that the terms "upper", "lower", "right", and the like are based on the orientations and positional relationships shown in the drawings and are used for convenience in description and simplicity in operation, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be constructed in a particular operation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used merely for descriptive purposes and are not intended to have any special meaning.

In the description herein, references to the description of "an embodiment," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

In addition, the foregoing is only the preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.