Loader automatic parking control system and loader

Abstract

The utility model provides an automatic parking control system of a loading machine and the loading machine, and belongs to the technical field of parking. The device comprises a function switch, wherein the function switch is respectively connected with a first relay 1 and a brake normally-open pressure switch; the brake normally open pressure switch is connected with a second relay; the first relay is respectively connected with the parking release electromagnetic valve and the parking normally-closed pressure switch; the second relay is further connected with the parking combination electromagnetic valve and the parking normally-open pressure switch. The parking function is controlled to be started and stopped through the function switch, temporary parking and automatic parking are started through the brake normally-open pressure switch, quit and brake and parking system linkage are carried out by detecting the angle of an accelerator pedal during relieving, operation is easy, comfort is high, and the maintenance cost is low.

Description

Technical Field

[0001] This utility model belongs to the field of parking technology, and in particular relates to an automatic parking control system for a loader and a loader. Background Technology

[0002] The statements in this section are merely background information related to this utility model and do not necessarily constitute prior art.

[0003] With the continuous development of the engineering vehicle market, drivers are paying more attention to maneuverability and safety. Existing loaders have an automatic parking function. When this function is activated while the vehicle is in motion, if you want to temporarily stop, you need to press the brake pedal to its full travel to trigger automatic parking, and press the accelerator to release the parking brake. However, the braking of this loader is mechanical. Temporary parking mainly uses a handbrake cable or parking valve, which requires separate operation. When braking, you need to press the brake pedal to apply mechanical braking. It cannot be linked with the parking system, making it inconvenient to operate when temporarily parking and resulting in a poor driving experience. Utility Model Content

[0004] The purpose of this utility model is to provide an automatic parking control system for a loader and a loader, so as to solve the problems of the inability of the braking and parking systems to be linked in the prior art, the inconvenience of temporary parking operations, and the poor driving experience.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] The first aspect of this utility model provides an automatic parking control system for a loader, comprising:

[0007] A function switch, which is connected to a first relay and a normally open brake pressure switch respectively;

[0008] The normally open brake pressure switch is connected to the second relay;

[0009] The first relay is connected to the parking release solenoid valve and the parking normally closed pressure switch, respectively.

[0010] The second relay is also connected to the parking engagement solenoid valve and the parking normally open pressure switch, respectively.

[0011] The normally closed parking pressure switch is also connected to an angle sensor.

[0012] The angle sensor is connected to the accelerator pedal.

[0013] Furthermore, the normally open parking pressure switch is also connected to the instrument panel.

[0014] Furthermore, the function switch is also connected to an indicator light.

[0015] Furthermore, the first relay includes a first normally open input contact, a first normally open output contact, a first normally closed input contact, and a first normally closed output contact;

[0016] The function switch is connected to the first normally open input contact, and the first normally open output contact is connected to the parking release solenoid valve, while the parking release solenoid valve is grounded.

[0017] The first normally closed input contact is connected to the parking normally closed pressure switch, and the first normally closed output contact is grounded.

[0018] Furthermore, the second relay includes a second normally open output contact, a second normally open output contact, a second normally closed input contact, and a second normally closed output contact;

[0019] The second normally open output contact is connected to the parking normally open pressure switch; the second normally open output contact is connected to the parking engagement solenoid valve, and the parking engagement solenoid valve is grounded; the second normally closed input contact is connected to the braking normally open pressure switch, and the second normally closed output contact is grounded.

[0020] Furthermore, the second normally open output contact is also connected to the operating power supply.

[0021] Furthermore, the function switch is also connected to a power supply.

[0022] Furthermore, the normally open braking pressure switch is normally open when not in operation.

[0023] Furthermore, the parking normally open pressure switch is normally open when not in operation.

[0024] The second aspect of this utility model provides a loader that uses an automatic parking control system for a loader as provided in the first aspect to achieve automatic parking.

[0025] The technical solution of this utility model has the following beneficial effects:

[0026] This invention controls the parking function by using a function switch to open and close the parking function. It activates the automatic parking function for temporary parking by using a normally open brake pressure switch, and releases the parking function by detecting the angle of the accelerator pedal. The braking and parking systems are linked, making it simple to operate, comfortable, and cost-effective for maintenance.

[0027] The advantages of this invention in terms of additional aspects will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0028] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0029] Figure 1 This is a schematic diagram of the automatic parking control system in Embodiment 1 of this utility model. Detailed Implementation

[0030] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0031] It should be noted that the terminology used herein is for the purpose of describing particular implementations only and is not intended to limit the exemplary implementations according to this utility model.

[0032] Where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0033] Example 1

[0034] This utility model discloses an automatic parking control system for a loader; such as Figure 1 As shown, it includes a function switch, which is connected to a first relay (i.e., relay 1) and a normally open brake pressure switch; the normally open brake pressure switch is connected to a second relay (i.e., relay 2); the first relay is connected to a parking release solenoid valve and a normally closed parking pressure switch; the second relay is also connected to a parking engage solenoid valve and a normally open parking pressure switch; the normally closed parking pressure switch is also connected to an angle sensor, which is connected to the accelerator pedal and is used to detect the angle data of the accelerator pedal.

[0035] In a specific implementation, the function switch is also connected to a working power supply, which can be a +24V DC power supply.

[0036] In a specific implementation, the first relay includes a first normally open input contact, a first normally open output contact, a first normally closed input contact, and a first normally closed output contact.

[0037] The function switch is connected to the first normally open input contact, and the first normally open output contact is connected to the parking release solenoid valve, which is also grounded.

[0038] The first normally closed input contact is connected to the parking normally closed pressure switch, and the first normally closed output contact is grounded.

[0039] In a specific implementation, the second relay includes a second normally open output contact, a second normally open output contact, a second normally closed input contact, and a second normally closed output contact.

[0040] The second normally open output contact is connected to the parking normally open pressure switch and the operating power supply, which can be a +24V DC power supply. The second normally open output contact is connected to the parking engagement solenoid valve, which is also grounded. The second normally closed input contact is connected to the parking normally open pressure switch, and the second normally closed output contact is grounded.

[0041] In a specific implementation, the parking normally closed pressure switch is a normally closed switch. When the angle sensor detects a change of 2±0.2 degrees in the throttle angle, the angle sensor outputs an electrical signal to relay 1 via the parking normally closed pressure switch. Relay 1 is energized, and the first normally open input contact and the first normally open output contact close to conduct electricity. The parking release solenoid valve is connected to the circuit, and the parking mode is exited.

[0042] In a specific implementation, the parking normally open pressure switch is a normally open switch and is also connected to the instrument panel. The instrument panel indicator light is used to indicate the current status. For example, the light is on when entering parking mode and off when exiting parking mode, so that the driver can intuitively know the current vehicle status.

[0043] In a specific implementation, the normally open brake pressure switch is normally open. When the normally open brake pressure switch is closed, the second normally open input contact and the second normally open output contact of relay 2 close and conduct electricity, the parking solenoid valve is connected to the circuit, and the parking mode is entered.

[0044] In a specific implementation, the brake pedal status is fed back through a normally open brake pressure switch; the actual parking status is fed back through a normally open parking pressure switch; the parking engagement solenoid valve is controlled and protected by the on / off state of the normally open brake pressure switch; and the parking release solenoid valve is controlled and protected by the state of the normally closed parking pressure switch and the angle sensor.

[0045] In a specific implementation, the function switch is also connected to an indicator light, which allows the driver to know the working status of the function switch. When the function switch is closed, the automatic parking function is activated and the indicator light is on; otherwise, the indicator light is off.

[0046] In a specific implementation, when the automatic parking function is not activated, both the normally open brake pressure switch and the normally open parking pressure switch are normally open, and the normally closed parking pressure switch is normally closed.

[0047] The parking brake switching solenoid valve is connected to the foot brake pedal line and the brake (brake pads on the front and rear axles) lines. When the parking brake switching solenoid valve is open, brake fluid in the brake lines can reach the brakes through the solenoid valve, thus braking the vehicle. The main function of the parking brake switching solenoid valve is to control whether brake fluid flows into the brakes.

[0048] Working principle of this utility model:

[0049] When the automatic parking function needs to be activated, press the function switch. The function indicator light will then be constantly illuminated. When the brake pedal is depressed and the brake pressure reaches the set value of 10 bar, the normally open brake pressure switch will close. At this time, relay 2 will close, and the parking engagement solenoid valve will operate. The parking line pressure will be detected. Due to the operation of the parking engagement solenoid valve, the line pressure will increase, and the normally open parking pressure switch will close, indicating that the automatic parking function is activated. When the brake pedal is released, the brake line pressure will decrease, and the normally open brake pressure switch will open to prevent the solenoid valve from being damaged by prolonged energization.

[0050] When the machine needs to move to exit the automatic parking mode, the accelerator pedal needs to be pressed. When the angle of the accelerator pedal changes, the angle sensor outputs an electrical signal to relay 1. Relay 1 closes, and the parking release solenoid valve works. After the solenoid valve finishes working, the pressure reaches its maximum value. At this time, the normally closed parking pressure switch opens to prevent the solenoid valve from being damaged by working for a long time. At this time, the parking mode is exited.

[0051] Example 2

[0052] This embodiment provides a loader that uses an automatic parking control system for loaders as provided in Embodiment 1 to achieve automatic parking.

[0053] Although the specific embodiments of the present utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present utility model. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solution of the present utility model are still within the scope of protection of the present utility model.

Claims

1. A loader automatic park control system characterized by, Includes a function switch, which is connected to a first relay and a normally open brake pressure switch respectively; The normally open brake pressure switch is connected to the second relay; The first relay is connected to the parking release solenoid valve and the parking normally closed pressure switch, respectively. The second relay is also connected to the parking engagement solenoid valve and the parking normally open pressure switch, respectively. The normally closed parking pressure switch is also connected to an angle sensor. The angle sensor is connected to the accelerator pedal.

2. An automatic parking control system for a loader as claimed in claim 1, characterised in that, The normally open parking pressure switch is also connected to the instrument panel.

3. An automatic parking control system for a loader as set forth in claim 1, characterized in that The function switch is also connected to an indicator light.

4. An automatic parking control system for a loader as set forth in claim 1, characterized in that The first relay includes a first normally open input contact, a first normally open output contact, a first normally closed input contact, and a first normally closed output contact; The function switch is connected to the first normally open input contact, and the first normally open output contact is connected to the parking release solenoid valve, while the parking release solenoid valve is grounded. The first normally closed input contact is connected to the parking normally closed pressure switch, and the first normally closed output contact is grounded.

5. An automatic parking control system for a loader as set forth in claim 1, wherein The second relay includes a second normally open output contact, a second normally open output contact, a second normally closed input contact, and a second normally closed output contact; The second normally open output contact is connected to the parking normally open pressure switch; The second normally open output contact is connected to the parking engagement solenoid valve, and the parking engagement solenoid valve is grounded; the second normally closed input contact is connected to the brake normally open pressure switch, and the second normally closed output contact is grounded.

6. An automatic parking control system for a loader as claimed in claim 5, characterised in that, The second normally open output contact is also connected to the operating power supply.

7. An automatic parking control system for a loader as set forth in claim 1, characterized in that The function switch is also connected to the power supply.

8. An automatic parking control system for a loader as set forth in claim 1, characterized in that The normally open braking pressure switch is normally open when not in operation.

9. An automatic parking control system for a loader as set forth in claim 1, characterized in that The parking normally open pressure switch is normally open when not in operation.

10. A loader characterized by Automatic parking is achieved by applying an automatic parking control system for a loader as described in any one of claims 1-9.

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