Quick-change bucket control circuit and loader

Abstract

The utility model discloses a quick-change bucket control circuit and a loader, and belongs to the technical field of loaders. Comprising a quick-change function switch, a first normally-open relay, a second normally-open relay, a first normally-closed relay, a second normally-closed relay, a quick-assembly electromagnetic valve, a first pressure switch, a quick-disassembly electromagnetic valve and a second pressure switch, the first end of the quick-change function switch is connected with the first normally-open relay, the first normally-open relay is electrically connected with the first normally-closed relay, and the first normally-closed relay is electrically connected with the quick-mounting electromagnetic valve; the second end of the quick-change function switch is connected with a second normally-open relay, the second normally-open relay is electrically connected with a second normally-closed relay, and the second normally-closed relay is electrically connected with a quick-release electromagnetic valve; the first pressure switch is electrically connected with the first normally-closed relay, and the second pressure switch is electrically connected with the second normally-closed relay. The bucket can be quickly replaced, and the efficiency is improved; the problem that replacement of an existing bucket wastes time and labor is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of loaders, in particular to a quick-change bucket control circuit and a loader. Background Art

[0002] The statements herein merely provide background art related to the present invention and do not necessarily constitute prior art.

[0003] A loader is a type of earthwork construction machinery used to shovel bulk materials such as soil, sand, gravel, lime, etc. It is widely used in construction projects such as roads, railways, and buildings. It can also perform light excavation operations on ore, hard soil, etc.

[0004] In order to adapt to different construction needs, loaders use different buckets under different working conditions, and the buckets need to be replaced. The bucket is fixed on the loader by a mechanical fixing pin. Every time the bucket is replaced, the fixing pin needs to be removed mechanically before the bucket can be replaced. The replacement time is long, and the replacement process requires manual removal with the help of electric wrenches or pneumatic tools, which is time-consuming and laborious. Utility Model Content

[0005] In view of the deficiencies in the prior art, the purpose of the embodiments of the utility model is to provide a quick-change bucket control circuit and a loader, by which the hydraulic cylinder installed at the end of the fixing pin is controlled by the quick-change bucket control circuit to retract and extend, thereby realizing rapid disassembly and installation of the fixing pin and improving the replacement efficiency of the bucket.

[0006] In order to achieve the above purpose, the embodiment of the utility model provides the following technical solutions:

[0007] A quick-change bucket control circuit includes a quick-change function switch, a first normally open relay, a second normally open relay, a first normally closed relay, a second normally closed relay, a quick-install solenoid valve, a first pressure switch, a quick-release solenoid valve, and a second pressure switch;

[0008] The first end of the quick-change function switch is connected to the first normally open relay, the first normally open relay is electrically connected to the first normally closed relay, and the first normally closed relay is electrically connected to the quick-install solenoid valve; the second end of the quick-change function switch is connected to the second normally open relay, the second normally open relay is electrically connected to the second normally closed relay, and the second normally closed relay is electrically connected to the quick-release solenoid valve;

[0009] The first pressure switch is electrically connected to the first normally closed relay, and the second pressure switch is electrically connected to the second normally closed relay.

[0010] By adopting the above technical solution, when the loader needs to install or remove the bucket, the quick-change function switch can be turned to the designated end to control the quick-install solenoid valve or the quick-release solenoid valve through the quick-change bucket control circuit, and then the removal and installation of the fixing pin can be achieved through the extension and retraction of the hydraulic cylinder, thereby improving efficiency; at the same time, the pressure switch is used to monitor the hydraulic pipeline of the hydraulic cylinder. When the pressure in the hydraulic pipeline is too high, the pressure switch is closed, the normally closed relay is energized and disconnected, and the quick-change bucket control circuit stops running, thereby improving operational safety.

[0011] In some embodiments, the first pressure switch and the second pressure switch are each electrically connected to a meter.

[0012] By adopting the above technical solution, when the hydraulic pipeline is stuck, the pressure rises. When the pressure exceeds the set value inside the pressure switch, the pressure switch closes and the instrument alarms, thereby reminding the operator to check the abnormality in time.

[0013] In some embodiments, the first pressure switch is arranged in a quick-install hydraulic pipeline, and the quick-install solenoid valve is communicated with the quick-install hydraulic pipeline; the second pressure switch is arranged in a quick-release hydraulic pipeline, and the quick-release solenoid valve is communicated with the quick-release hydraulic pipeline.

[0014] By adopting the above technical solution, the first pressure switch is used to monitor the pressure in the quick-install hydraulic pipeline, the second pressure switch is used to monitor the pressure in the quick-release hydraulic pipeline, and the quick-install solenoid valve is used to control the conduction of the quick-install hydraulic pipeline, thereby realizing the extension of the hydraulic cylinder and quickly installing the fixing pin; the quick-release solenoid valve is used to control the conduction of the quick-release hydraulic pipeline, thereby realizing the contraction of the hydraulic cylinder and quickly removing the fixing pin.

[0015] In some embodiments, the first normally open relay includes a first normally open switch and a first coil, and the first normally closed relay includes a first normally closed switch and a second coil;

[0016] The first end of the quick-change function switch is electrically connected to the first end of the first coil, and the second end of the first coil is grounded; the first normally open switch is electrically connected to the first end of the first normally closed switch, and the second end of the first normally closed switch is electrically connected to the quick-change solenoid valve;

[0017] The first pressure switch is electrically connected to a first end of the second coil, and a second end of the second coil is grounded.

[0018] By adopting the above technical solution, the quick-change solenoid valve is opened and closed by a circuit composed of a quick-change function switch, a first normally open relay and a first normally closed relay, and the signal transmission is stable and reliable.

[0019] In some embodiments, a diode is connected in parallel to the first coil and the second coil.

[0020] By adopting the above technical solution, a diode is used to prevent the current from flowing in reverse, thereby improving the safety of the first normally open relay and the first normally closed relay.

[0021] In some embodiments, the second normally open relay includes a second normally open switch and a third coil, and the second normally closed relay includes a second normally closed switch and a fourth coil;

[0022] The second end of the quick-change function switch is electrically connected to the first end of the third coil, and the second end of the third coil is grounded; the second normally open switch is electrically connected to the first end of the second normally closed switch, and the second end of the second normally closed switch is electrically connected to the quick-change solenoid valve;

[0023] The second pressure switch is electrically connected to a first end of the fourth coil, and a second end of the fourth coil is grounded.

[0024] By adopting the above technical solution, the quick-release solenoid valve is opened and closed by a circuit composed of a quick-change function switch, a second normally open relay and a second normally closed relay, and the signal transmission is stable and reliable.

[0025] In some embodiments, a diode is connected in parallel to the third coil and the fourth coil.

[0026] By adopting the above technical solution, a diode is used to prevent the current from flowing in reverse, thereby improving the safety of the second normally open relay and the second normally closed relay.

[0027] In some embodiments, a hydraulic cylinder is further included, wherein a telescopic end of the hydraulic cylinder is connected to the end of the fixing pin.

[0028] By adopting the above technical solution, the hydraulic cylinder is used as the power source for disassembly and assembly of the fixing pin, which saves manpower and improves disassembly and assembly efficiency.

[0029] In some embodiments, the quick-change function switch is a single-pole double-throw switch, and the first pressure switch and the second pressure switch are normally open pressure switches.

[0030] The utility model also provides a loader, comprising the above-mentioned quick-change bucket control circuit.

[0031] One or more technical solutions provided by the utility model have at least the following technical effects or advantages:

[0032] 1. The technical solution provided by the utility model uses a quick-change bucket control circuit to control the extension and retraction of the hydraulic cylinder, thereby realizing the rapid disassembly and installation of the fixing pin when replacing the bucket, thereby improving the efficiency of bucket replacement and reducing the use of manpower.

[0033] 2. The technical solution provided by the utility model uses a quick-change bucket control circuit to control the working status of the quick-install solenoid valve and the quick-release solenoid valve. Compared with the existing control of the solenoid valve through communication transmission of control signals, it has stronger stability and reliability and has a certain real-time performance.

[0034] 3. The technical solution provided by the utility model monitors the pressure of the hydraulic pipeline through the pressure switch. When the pressure is too high, the quick-change bucket control circuit stops running and the instrument alarms, promptly reminding the operator to check the hydraulic cylinder for abnormalities. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0036] Figure 1 It is a circuit connection schematic diagram provided by an embodiment of the utility model;

[0037] In the figure: 1. First normally open relay; 2. Second normally open relay; 3. First normally closed relay; 4. Second normally closed relay; 5. Quick-install solenoid valve; 6. Quick-release solenoid valve.

[0038] In order to show the positions of various parts, the distances or sizes between them are exaggerated and the schematic diagram is for reference only. DETAILED DESCRIPTION

[0039] It should be noted that the following detailed descriptions are all illustrative and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0040] Embodiment 1

[0041] As introduced in the background technology, the disassembly of the fixing pin in the prior art requires manual disassembly and assembly with the help of tools, and the disassembly and assembly efficiency is low and the labor cost is high. In order to solve the above technical problems, the end of the fixing pin is fixed on the hydraulic cylinder, and the hydraulic cylinder is used to drive the fixing pin. The utility model proposes a quick-change bucket control circuit, which controls the oil supplied to the hydraulic cylinder through an electromagnetic valve to control the extension and retraction of the hydraulic cylinder, thereby controlling the loading and unloading of the fixing pin to achieve quick change of the bucket. Compared with the existing wireless communication control, the signal transmission using the circuit has stronger signal stability and real-time performance, and does not need to rely on the network.

[0042] Combination Figure 1The quick-change bucket control circuit includes a quick-change function switch, a first normally open relay 1, a second normally open relay 2, a first normally closed relay 3, a second normally closed relay, a quick-loading solenoid valve 5 and a first pressure switch arranged in a quick-loading hydraulic pipeline, and a quick-release solenoid valve 6 and a second pressure switch arranged in a quick-release hydraulic pipeline. The quick-loading solenoid valve 5 is connected to the quick-loading hydraulic pipeline of the hydraulic cylinder, and the quick-release solenoid valve 6 is connected to the quick-release hydraulic pipeline of the hydraulic cylinder; the first normally open relay 1 includes a first normally open switch and a first coil, and the first normally closed relay 3 includes a first normally closed switch and a second coil; the second normally open relay 2 includes a second normally open switch and a third coil, and the second normally closed relay includes a second normally closed switch and a fourth coil.

[0043] The quick-change function switch is a single-pole double-throw switch, the third end of the quick-change function switch is electrically connected to the power supply, the first end of the quick-change function switch is electrically connected to the first end of the first coil, the second end of the first coil is grounded, the first end of the first normally open switch is electrically connected to the power supply, the second end of the first normally open switch is electrically connected to the first end of the first normally closed switch, and the second end of the first normally closed switch is electrically connected to the quick-install solenoid valve 5; the first end of the first pressure switch is electrically connected to the power supply, the second end of the first pressure switch is electrically connected to the first end of the second coil, and the second end of the second coil is grounded, thereby forming a control branch of the quick-install solenoid valve 5, and the working state of the quick-install solenoid valve 5 is controlled by controlling the closing and opening of the first normally open switch and the first normally closed switch, thereby improving the response speed and stability of the quick-install solenoid valve 5.

[0044] The second end of the quick-change function switch is electrically connected to the first end of the third coil, and the second end of the third coil is grounded; the second normally open switch is electrically connected to the first end of the second normally closed switch, and the second end of the second normally closed switch is electrically connected to the quick-install solenoid valve 5; the first end of the second pressure switch is electrically connected to the power supply, the second end of the second pressure switch is electrically connected to the first end of the fourth coil, and the second end of the fourth coil is grounded, thereby forming a control branch of the quick-release solenoid valve 6. The working state of the quick-release solenoid valve 6 is controlled by controlling the closing and opening of the second normally open switch and the second normally closed switch, thereby improving the response speed and stability of the quick-release solenoid valve 6.

[0045] Furthermore, in order to provide a more obvious warning effect, the first pressure switch and the second pressure switch are respectively electrically connected to instruments. The instruments here are instruments built into the loader cab. When the pressure in the quick-install hydraulic pipeline or the quick-release hydraulic pipeline is too high, the instrument can display a fault and an alarm to remind the operator to inspect the hydraulic cylinder in time.

[0046] In this embodiment, the hydraulic cylinder is installed on the internal bracket of the boom, located at the installation point of the boom and the bucket, and does not affect the normal use of the bucket when the engineering vehicle is running.

[0047] The working method of this embodiment is as follows:

[0048] In the initial state, the first normally open switch is open, the first normally closed switch is closed, the second normally open switch is open, and the second normally closed switch is closed.

[0049] When the loader needs to install a bucket, the original bucket has been removed, the newly replaced bucket is placed on the boom and aligned with the mounting hole, the quick-change function switch is turned to the first end, the first coil is energized, the first normally open switch is closed, the quick-install solenoid valve 5 is energized and started, the quick-install hydraulic pipeline provides extension power for the hydraulic cylinder, the telescopic end of the hydraulic cylinder is extended, and the fixing pin is installed in the mounting hole; at this time, if the pressure in the quick-install hydraulic pipeline is too high and exceeds the internal setting value of the first pressure switch, the first pressure switch is closed, the second coil is energized, the first normally closed switch is disconnected, and the quick-install solenoid valve 5 stops working.

[0050] When the loader needs to unload the bucket, after removing the nut on the fixing pin, the quick-change function switch is turned to the second end, the third coil is energized, the second normally open switch is closed, the quick-release solenoid valve 6 is energized and started, the quick-release hydraulic pipeline provides contraction power for the hydraulic cylinder, and the telescopic end of the hydraulic cylinder is retracted to bring the fixing pin out of the installation hole.

[0051] Embodiment 2

[0052] Based on the above-mentioned quick-change bucket control circuit, an embodiment of the utility model further provides a loader, in which the quick-change bucket control circuit described in the above-mentioned embodiment is provided. Since the above-mentioned quick-change bucket control circuit has the above-mentioned technical effects, the technical effects of the loader adopting the quick-change bucket control circuit please refer to the above-mentioned embodiment.

[0053] Although the above describes the specific implementation methods of the utility model in combination with the accompanying drawings, it is not intended to limit the scope of protection of the utility model. Technical personnel in the relevant field should understand that on the basis of the technical solution of the utility model, various modifications or deformations that can be made by technical personnel in this field without creative work are still within the scope of protection of the utility model.

Claims

1. A quick-change bucket control circuit, characterized in that: It includes a quick-change function switch, a first normally open relay, a second normally open relay, a first normally closed relay, a second normally closed relay, a quick-install solenoid valve, a first pressure switch, a quick-release solenoid valve and a second pressure switch; The first end of the quick-change function switch is connected to the first normally open relay, the first normally open relay is electrically connected to the first normally closed relay, and the first normally closed relay is electrically connected to the quick-install solenoid valve; the second end of the quick-change function switch is connected to the second normally open relay, the second normally open relay is electrically connected to the second normally closed relay, and the second normally closed relay is electrically connected to the quick-release solenoid valve; The first pressure switch is electrically connected to the first normally closed relay, and the second pressure switch is electrically connected to the second normally closed relay.

2. The quick-change bucket control circuit according to claim 1, characterized in that: The first pressure switch and the second pressure switch are electrically connected to instruments respectively.

3. The quick-change bucket control circuit according to claim 1, characterized in that: The first pressure switch is arranged on the quick-install hydraulic pipeline, and the quick-install solenoid valve is communicated with the quick-install hydraulic pipeline; the second pressure switch is arranged on the quick-release hydraulic pipeline, and the quick-release solenoid valve is communicated with the quick-release hydraulic pipeline.

4. The quick-change bucket control circuit according to claim 1, characterized in that: The first normally open relay includes a first normally open switch and a first coil, and the first normally closed relay includes a first normally closed switch and a second coil; The first end of the quick-change function switch is electrically connected to the first end of the first coil, and the second end of the first coil is grounded; the first normally open switch is electrically connected to the first end of the first normally closed switch, and the second end of the first normally closed switch is electrically connected to the quick-change solenoid valve; The first pressure switch is electrically connected to a first end of the second coil, and a second end of the second coil is grounded.

5. The quick-change bucket control circuit according to claim 4, characterized in that: The first coil and the second coil are both connected in parallel with a diode.

6. The quick-change bucket control circuit according to claim 1, characterized in that: The second normally open relay includes a second normally open switch and a third coil, and the second normally closed relay includes a second normally closed switch and a fourth coil; The second end of the quick-change function switch is electrically connected to the first end of the third coil, and the second end of the third coil is grounded; the second normally open switch is electrically connected to the first end of the second normally closed switch, and the second end of the second normally closed switch is electrically connected to the quick-change solenoid valve; The second pressure switch is electrically connected to a first end of the fourth coil, and a second end of the fourth coil is grounded.

7. The quick-change bucket control circuit according to claim 6, characterized in that: The third coil and the fourth coil are both connected in parallel with diodes.

8. The quick-change bucket control circuit according to claim 1, characterized in that: It also includes a hydraulic cylinder, the telescopic end of which is connected to the end of the fixing pin.

9. The quick-change bucket control circuit according to claim 1, characterized in that: The quick-change function switch is a single-pole double-throw switch, and the first pressure switch and the second pressure switch are normally open pressure switches.

10. A loader, characterized in that: It comprises the quick-change bucket control circuit as described in any one of claims 1-9.

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