Four-wheel-drive braking control system and loader

Abstract

The utility model provides a four-wheel-drive braking control system and a loader, and belongs to the technical field of engineering instruments. The device comprises a brake, a first normally-open relay, a second normally-open relay and a four-wheel-drive electromagnetic valve. A pressure sensor is arranged on the brake; the pressure sensor is connected with the input end of the first normally open relay; the output end of the first normally-open relay and the output end of the second normally-open relay are both connected with the input end of the four-wheel-drive electromagnetic valve. The four-wheel drive mode can be switched for braking under the condition of two-wheel drive mode whole vehicle transition, so that the braking force and the driving safety are improved.

Description

Technical Field

[0001] This utility model belongs to the field of engineering machinery technology, and in particular relates to a four-wheel drive braking control system 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] In the field of loaders, there are two-wheel drive and four-wheel drive modes. Four-wheel drive means that all four wheels of the loader are equipped with braking systems, capable of applying braking force to each wheel simultaneously or independently. This design significantly improves the loader's braking performance, stability, and safety, especially crucial under heavy loads, on slopes, or on slippery surfaces. Two-wheel drive mode means that only two wheels (usually the rear wheels) provide driving force, resulting in a lower engine load and better fuel economy compared to four-wheel drive. It is suitable for long-distance transport. In two-wheel drive mode, the braking torque for both service and parking brakes is lower than in four-wheel drive mode.

[0004] Two-wheel drive mode is often used for loader relocation. During the relocation of the loader, braking is also carried out in two-wheel drive mode. Due to the high speed, the braking force of two-wheel drive mode is limited, which poses a safety risk. Utility Model Content

[0005] The purpose of this invention is to provide a four-wheel drive braking control system to solve the problem of insufficient braking force in two-wheel drive mode during the transfer of the loader, thereby improving the driving safety of the loader.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] The first aspect of this utility model provides a four-wheel drive braking control system, comprising:

[0008] Brake, first normally open relay, second normally open relay, and four-wheel drive solenoid valve;

[0009] A pressure sensor is installed on the brake;

[0010] The pressure sensor is connected to the input terminal of the first normally open relay;

[0011] Both the output terminals of the first normally open relay and the second normally open relay are connected to the input terminal of the four-wheel drive solenoid valve.

[0012] Furthermore, the output end of the four-wheel drive solenoid valve is connected to an instrument indicator light.

[0013] Furthermore, the instrument indicator light is grounded.

[0014] Furthermore, the output terminal of the first normally open relay includes a normally open contact and a normally closed contact;

[0015] The normally open contact is connected to the four-wheel drive solenoid valve.

[0016] The normally closed contact is grounded.

[0017] Furthermore, the output terminal of the second normally open relay includes a normally open contact and a normally closed contact;

[0018] The normally open contact is connected to the four-wheel drive solenoid valve;

[0019] The normally closed contact is grounded.

[0020] Furthermore, the input terminal of the first normally open relay includes a first contact and a second contact.

[0021] Furthermore, the first contact is connected to a pressure sensor, and the second contact is connected to a power source.

[0022] Furthermore, the input terminals of the second normally open relay include a third contact and a fourth contact.

[0023] Furthermore, the third contact is connected to the power supply, and the fourth contact is connected to the push-button switch.

[0024] The second aspect of this utility model provides a loader that applies a four-wheel drive braking control system as described in the first aspect.

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

[0026] When transferring a vehicle in two-wheel drive mode, this invention can switch to four-wheel drive mode for braking, thereby improving braking force and driving safety.

[0027] This invention utilizes a pressure sensor and a first normally open relay to automatically activate the four-wheel drive mode for braking. A push-button switch and a second normally open relay together enable manual activation of the four-wheel drive mode for braking. These two modes, operating on separate circuits, ensure comprehensive four-wheel drive mode activation, preventing malfunctions in either automatic or manual activation that could lead to dangerous driving situations, thus further enhancing driving safety.

[0028] Advantages of the present invention in 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

[0029] 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.

[0030] Figure 1 This is a schematic diagram of the circuit structure of this utility model. Detailed Implementation

[0031] 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.

[0032] 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.

[0033] Where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0034] Example 1

[0035] This embodiment discloses a four-wheel drive braking control system, such as Figure 1 As shown, it includes:

[0036] Brake, first normally open relay, second normally open relay, and four-wheel drive solenoid valve;

[0037] A pressure sensor is installed on the brake, and the pressure sensor is connected to the input terminal of the first normally open relay.

[0038] The normally open contacts of the first normally open relay output terminal and the normally open contacts of the second normally open relay output terminal are both connected to the input terminal of the four-wheel drive solenoid valve.

[0039] In a specific implementation, the pressure sensor is used to detect the pressure data of the brake. When the brake is subjected to pressure, i.e. when the loader is braked, the pressure sensor generates a corresponding electrical signal, which is transmitted to the first normally open relay.

[0040] In a specific implementation, the first normally open relay includes an input terminal and an output terminal. The input terminal includes a first contact and a second contact, and the output terminal includes a first normally open contact and a first normally closed contact. The first contact is connected to a pressure sensor, the second contact is connected to a power supply, the first normally open contact is connected to a four-wheel drive solenoid valve, and the first normally closed contact is grounded.

[0041] When no trigger signal is received, the first normally open contact of the first normally open relay is open. When a trigger signal is received (i.e., an electrical signal transmitted from the pressure sensor), the first normally open relay will activate, causing the first normally open contact to close, thus allowing current to flow. At this time, the four-wheel drive solenoid valve is energized, activating the four-wheel drive mode for braking. The pressure sensor and the first normally open relay together realize the function of automatically activating the four-wheel drive mode for braking.

[0042] In a specific implementation, the second normally open relay includes an input terminal and an output terminal. The input terminal includes a third contact and a fourth contact, and the output terminal includes a second normally open contact and a second normally closed contact. The third contact is connected to the power supply, the fourth contact is connected to the push-button switch, the second normally open contact is grounded, and the second normally closed contact is connected to the four-wheel drive solenoid valve. The four-wheel drive solenoid valve is an electromagnetically controlled valve used to control whether the four-wheel drive system is in four-wheel drive mode. When the solenoid valve receives an electrical signal, it activates the four-wheel drive mode.

[0043] The push-button switch is a manual control switch. The driver can send an electrical signal by pressing this switch to trigger the second normally open relay, causing the second normally open contact to close and the circuit to be connected.

[0044] When no trigger signal is received, the second normally open relay's second normally open contact is open. When a trigger signal is received (i.e., the push-button switch is pressed), the second normally open relay will activate, causing its second normally open contact to close, thus allowing current to flow. At this time, the four-wheel drive solenoid valve is energized, activating the four-wheel drive mode for braking. The push-button switch and the second normally open relay together realize the function of manually activating the four-wheel drive mode for braking.

[0045] In a specific implementation, the output terminal of the four-wheel drive solenoid valve is connected to an instrument indicator light, and the other end of the instrument indicator light is grounded. The instrument indicator light is used to display the four-wheel drive mode operating status. When the four-wheel drive mode is activated, the instrument indicator light is on; when the four-wheel drive mode is deactivated, the instrument indicator light is off, allowing the driver to intuitively know whether the four-wheel drive mode is activated.

[0046] Working principle of this utility model:

[0047] When the two-wheel drive mode is frequently used for braking during the relocation of the loader, the following two methods can be selected to switch to the four-wheel drive mode for braking:

[0048] 1. Automatic switching of four-wheel drive mode: When pressure is applied to the brake and the pressure sensor detects that the pressure data exceeds the preset threshold, the pressure sensor outputs an electrical signal to the first normally open relay, causing the first normally open contact to close, allowing current to flow to the four-wheel drive solenoid valve. The four-wheel drive solenoid valve is energized to activate the four-wheel drive mode for braking, and at the same time the indicator light illuminates to remind the driver that the four-wheel drive mode is activated.

[0049] 2. Manually switch to four-wheel drive mode: Press the button switch, the button switch outputs an electrical signal to the second normally open relay, causing the second normally open contact of the second normally open relay to close. Current will flow to the four-wheel drive solenoid valve, the four-wheel drive solenoid valve is energized to activate the four-wheel drive mode for braking, and the indicator light will illuminate to remind the driver that the four-wheel drive mode is activated.

[0050] Example 2

[0051] This embodiment provides a loader that uses a four-wheel drive braking control system as described in Embodiment 1.

[0052] 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 four-wheel drive braking control system, characterized in that, Includes a brake, a first normally open relay, a second normally open relay, and a four-wheel drive solenoid valve; A pressure sensor is installed on the brake; The pressure sensor is connected to the input terminal of the first normally open relay; Both the output terminals of the first normally open relay and the second normally open relay are connected to the input terminal of the four-wheel drive solenoid valve.

2. The four-wheel drive braking control system as described in claim 1, characterized in that, The output end of the four-wheel drive solenoid valve is connected to the instrument indicator light.

3. The four-wheel drive braking control system as described in claim 2, characterized in that, The instrument indicator light is grounded.

4. The four-wheel drive braking control system as described in claim 1, characterized in that, The output terminal of the first normally open relay includes a normally open contact and a normally closed contact; The normally open contact is connected to the four-wheel drive solenoid valve. The normally closed contact is grounded.

5. A four-wheel drive braking control system as described in claim 1, characterized in that, The output terminal of the second normally open relay includes a normally open contact and a normally closed contact; The normally open contact is connected to the four-wheel drive solenoid valve; The normally closed contact is grounded.

6. The four-wheel drive braking control system as described in claim 1, characterized in that, The input terminal of the first normally open relay includes a first contact and a second contact.

7. A four-wheel drive braking control system as described in claim 6, characterized in that, The first contact is connected to a pressure sensor, and the second contact is connected to a power source.

8. The four-wheel drive braking control system as described in claim 1, characterized in that, The input terminals of the second normally open relay include the third contact and the fourth contact.

9. A four-wheel drive braking control system as described in claim 8, characterized in that, The third contact is connected to the power supply, and the fourth contact is connected to the push-button switch.

10. A loader, characterized in that, The application uses a four-wheel drive braking control system as described in any one of claims 1-9.

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