Electronic parking system of pure electric loader

Abstract

The utility model discloses an electronic parking system of a pure electric loader, and belongs to the technical field of engineering machinery. Comprising a VCU, a parking key electrically connected with the VCU, an electric proportional parking brake valve and a parking brake pressure sensor, the electric proportional parking brake valve is connected with a shuttle valve, and the shuttle valve is sequentially connected with the parking brake pressure sensor and a parking brake caliper. The hydraulic pump, the filter and the prefill valve are sequentially connected, and the prefill valve is connected with two branches which are communicated with the manual parking valve and the electric proportional parking brake valve respectively. High-pressure liquid is conveyed through the hydraulic pump and filtered through the filter, one path can enter the parking brake caliper through the manual parking valve, and the other path can enter the parking brake caliper through the electric proportional parking brake valve. And once the electronic parking part fails, parking can be realized through the other path, so that the reliability of the system is ensured. Once electric parts of the whole vehicle fail and high pressure cannot be applied to the whole vehicle, emergency parking releasing can be achieved through the manual pump, and the whole vehicle trailer is convenient to maintain.

Description

TECHNICAL FIELD

[0001] The utility model belongs to engineering machinery technical field, and specifically is a kind of pure electric loader electronic parking system. BACKGROUND

[0002] Parking brake system is very important core system as engineering machinery, and is the key to ensure the safe driving of whole vehicle.

[0003] Current loader brake system is mostly traditional manual air pressure parking brake, and has problems such as long corresponding time for releasing brake, laborious for long time use, forgetting parking when parking and the like. And traditional parking brake is clamped and dead when emergency brake, which is easy to cause whole vehicle to overturn, and has dangerous. On the one hand, existing parking brake does not have emergency release parking brake function. CONTENT OF UTILITY MODEL

[0004] 1. Technical problem to be solved by the utility model

[0005] The utility model aims at solving the problem that existing loader brake system does not have emergency release parking brake function.

[0006] 2. Technical scheme

[0007] To achieve the above-mentioned purpose, the technical scheme provided by the utility model is as follows:

[0008] The utility model discloses a kind of pure electric loader electronic parking system of the utility model, including VCU, parking button with VCU electrical connection, electric proportional parking brake valve and parking brake pressure sensor, the electric proportional parking brake valve is connected with shuttle valve, the shuttle valve is connected with parking brake pressure sensor and parking brake caliper in turn;It also includes sequentially connected hydraulic pump, filter and liquid filling valve, the liquid filling valve is connected with two branches respectively with manual parking valve and electric proportional parking brake valve intercommunication.

[0009] Preferably, the parking button is configured to include multiple output signals, the VCU stores information and execution strategy corresponding to the multiple output signals, and the VCU is electrically connected to a drive motor.

[0010] Preferably, the manual parking valve is in communication with the shuttle valve.

[0011] Preferably, the liquid filling valve is further provided with a branch connected to a manual pump.

[0012] Preferably, the liquid filling valve is provided with an overflow valve.

[0013] Preferably, a parking accumulator is provided on the branch connected to the liquid filling valve and the electric proportional parking brake valve, the parking accumulator stores gas and liquid therein, the gas is high-pressure inert gas, and the liquid is hydraulic oil.

[0014] Preferably, the electric proportional parking brake valve is a current-controlled brake valve, which is configured to communicate the B port and the T port of the electric proportional parking brake valve when not powered, and the vehicle is in the parking state; and the output pressure is proportional to the current value.

[0015] Preferably, the filter is provided with a bypass valve for placing blockage.

[0016] Preferably, the parking brake caliper is provided with a spring, and the parking brake caliper is configured to rely on the spring for parking brake; the parking brake caliper is provided with a piston, and the spring force is offset by the piston pressure when the brake is released.

[0017] 3. Beneficial effects

[0018] Compared with the prior art, the technical scheme has the following beneficial effects:

[0019] The electronic parking system of the pure electric loader comprises a VCU, a parking button electrically connected with the VCU, an electric proportional parking brake valve and a parking brake pressure sensor, the electric proportional parking brake valve is connected with a shuttle valve, and the shuttle valve is connected with the parking brake pressure sensor and a parking brake caliper in sequence. The hydraulic pump, the filter and the liquid filling valve are connected in sequence, the liquid filling valve is connected with two branches which are in communication with a manual parking valve and the electric proportional parking brake valve respectively. High-pressure liquid delivered by the hydraulic pump is filtered through the filter, one way is to enter the parking brake caliper through the manual parking valve, and the other way is to enter the parking brake caliper through the electric proportional parking brake valve. Once the electronic parking part fails, parking can be realized through the other way, and the system reliability is ensured. Once the vehicle cannot be pressurized due to the failure of the electric device, emergency parking release can be realized through the manual pump, and the vehicle is convenient for towing and maintenance. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structural schematic view of the electronic parking system of the pure electric loader.

[0021] Explanation of reference numerals in the schematic view:

[0022] 1, hydraulic pump; 2, filter; 3, liquid filling valve; 4, manual pump; 5, manual parking valve; 6, shuttle valve; 7, parking brake pressure sensor; 8, parking brake caliper; 9, driving motor; 10, electric proportional parking brake valve; 11, VCU; 12, parking accumulator; 13, parking button. DETAILED DESCRIPTION

[0023] In order to make the personnel in the technical field better understand the scheme of the present application, the technical scheme in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

[0024] It should be noted that the terms "first", "second", and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to only those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0025] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0026] In addition, in addition to being used to indicate the orientation or positional relationship, the above-mentioned part of the terms can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain dependent relationship or connection relationship in some cases. For those skilled in the art, the specific meaning of these terms in the present application can be understood according to the specific circumstances.

[0027] In addition, the terms "mount", "set", "provided with", "connected", "connected", "sleeved" should be broadly understood. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or internal communication between two devices, elements or components. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] Example 1

[0030] See attached document Figure 1 This embodiment of an electronic parking system for a pure electric loader includes a VCU11, a parking button 13 electrically connected to the VCU11, an electric proportional parking brake valve 10, and a parking brake pressure sensor 7. The electric proportional parking brake valve 10 is connected to a shuttle valve 6, which is sequentially connected to the parking brake pressure sensor 7 and the parking brake caliper 8. It also includes a hydraulic pump 1, a filter 2, and a filling valve 3 connected in sequence. The filling valve 3 has two branches, one connected to a manual parking valve 5 and the other to the electric proportional parking brake valve 10. In this embodiment, the system uses the hydraulic pump 1 to deliver high-pressure liquid, which is filtered by the filter 2. One branch enters the parking brake caliper 8 through the manual parking valve 5, and the other branch enters the parking brake caliper 8 through the electric proportional parking brake valve 10. If the electronic parking brake fails, parking can be achieved through the other branch, ensuring system reliability. If the entire vehicle cannot operate at high voltage due to electrical component failure, the manual pump 4 can be used to release the parking brake in an emergency, facilitating towing and repair of the entire vehicle.

[0031] The parking button 13 is configured to include multiple output signals, the VCU 11 stores information and execution strategies for the corresponding multiple output signals, and the VCU 11 is electrically connected to the drive motor 9.

[0032] The manual parking valve 5 is connected to the shuttle valve 6.

[0033] The filling valve 3 is also provided with a branch line connected to a manual pump 4.

[0034] The filling valve 3 is equipped with an overflow valve.

[0035] A parking accumulator 12 is provided on the branch connecting the filling valve 3 and the electric proportional parking brake valve 10. The parking accumulator 12 stores gas and liquid. The gas is high-pressure inert gas and the liquid is hydraulic oil.

[0036] The electric proportional parking brake valve 10 is a current-controlled brake valve. When the electric proportional parking brake valve 10 is not energized, its B port and T port are connected, and the vehicle is in a parking state; and the output pressure is proportional to the current value.

[0037] The filter 2 is equipped with a built-in bypass valve to prevent blockage.

[0038] The parking brake caliper 8 is provided with a spring, and is configured to rely on the spring for parking brake; the parking brake caliper 8 is internally provided with a piston, and when the brake is released, the spring force is offset by the piston pressure.

[0039] The above-described embodiments only express certain implementation manners of the present application, and the description is relatively specific and detailed, but should not be understood as a limitation on the patent scope of the present application; it should be pointed out that, for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application; therefore, the protection scope of the present application patent should be subject to the appended claims.

Claims

1. An electric-only loader electronic parking brake system characterized by: The application relates to a parking brake system, which comprises a VCU (11), a parking button (13) electrically connected with the VCU (11), an electric proportional parking brake valve (10) connected with a shuttle valve (6), the shuttle valve (6) being connected with a parking brake pressure sensor (7) and a parking brake caliper (8) in sequence, a hydraulic pump (1), a filter (2) and a liquid filling valve (3) connected in sequence, and the liquid filling valve (3) being connected with two branches respectively communicating with a manual parking valve (5) and the electric proportional parking brake valve (10).

2. An electronic parking brake system for a pure electric loader as claimed in claim 1, characterized in that: The parking button (13) is configured to contain multiple output signals, the VCU (11) stores information and execution strategies corresponding to the multiple output signals, and the VCU (11) is electrically connected with a driving motor (9).

3. An electric electronic parking brake system for a pure electric loader as claimed in claim 2, characterized in that: The manual parking valve (5) communicates with the shuttle valve (6).

4. An electronic parking brake system for a pure electric loader as defined in claim 2, characterized in that: The liquid filling valve (3) is further provided with a branch connected with a manual pump (4).

5. An electronic parking brake system for a pure electric loader as defined in claim 2, characterized in that: The liquid filling valve (3) is provided with an overflow valve.

6. An electronic parking brake system for a pure electric loader as defined in claim 2, characterized in that: A parking accumulator (12) is arranged on a branch connected with the liquid filling valve (3) and the electric proportional parking brake valve (10), the parking accumulator (12) stores gas and liquid, the gas is high-pressure inert gas, and the liquid is hydraulic oil.

7. An electronic parking brake system for a pure electric loader as defined in claim 2, characterized by: The electric proportional parking brake valve (10) is a current-controlled brake valve, when the electric proportional parking brake valve (10) is not powered, the B port of the electric proportional parking brake valve communicates with the T port, and the whole vehicle is in a parking state; and the output pressure is proportional to the current value.

8. An electronic parking brake system for a pure electric loader as defined in claim 2, characterized in that: The filter (2) is provided with a bypass valve for placing blockage.

9. An electronic parking brake system for a pure electric loader as defined in claim 2, characterized in that: The parking brake caliper (8) is provided with a spring, the parking brake caliper (8) is configured to rely on the spring for parking brake, the parking brake caliper (8) is provided with a piston, and when the brake is released, the spring force is offset by the piston pressure.

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