Trailer device for releasing parking of electric motor coach through electric control

Abstract

The invention discloses a trailer device for releasing parking of an electric motor coach through electric control, and belongs to the technical field of vehicle engineering. Comprising a fixed base which is used for being fixed on a frame and is provided with a first electromagnetic valve switch; the tow hook can be inserted into the fixed base and is in contact with the first electromagnetic valve switch; the lock valve assembly is arranged on the fixed base and is used for locking or unlocking the tow hook; the second electromagnetic valve switch is arranged in the vehicle; and the electromagnetic valve is electrically connected with the first electromagnetic valve switch and the second electromagnetic valve switch, and the air flow direction between an air storage cylinder of the automobile and the rear axle parking brake air chamber and between the air storage cylinder and the lock valve assembly are switched through the electromagnetic valve. When a trailer is needed, the trailer hook is inserted into the fixed base and is in contact with the first electromagnetic valve switch to be electrified, the vehicle enters a trailer state, after the trailer is completed, the second electromagnetic valve switch is pressed down to close the electromagnetic valve, the vehicle ends the trailer state, the automation degree is high, operation is more convenient, and the trailer operation efficiency and convenience are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of vehicle engineering, and in particular relates to a trailer device for electronically controlling parking release of an electric bus. Background Art

[0002] With the development of electric vehicle technology, pure electric buses are increasingly favored by the market due to their environmental protection and energy saving advantages. However, when an electric bus breaks down and needs to be towed, the traditional towing method often has certain limitations.

[0003] The current problem with towing electric buses is that manual operation is required to release the parking brake and fix the trailer hook, which is not only time-consuming and labor-intensive, but also requires an external air source or manually unscrewing the rear axle parking brake air chamber push rod bolt to release the brake state in some cases, which undoubtedly increases the complexity of towing. Summary of the invention

[0004] The present invention aims at the above problems existing in the prior art and proposes a trailer device for releasing parking of an electric bus by electronic control.

[0005] The present invention can be achieved through the following technical solutions:

[0006] A trailer device for an electric bus with electronically controlled parking release, comprising:

[0007] A fixed base, which is used to be fixed on the vehicle frame and is provided with a first solenoid valve switch;

[0008] A trailer hook, which can be inserted into the fixed base and contact the first solenoid valve switch;

[0009] a locking valve assembly, which is disposed on the fixed base and is used to lock or unlock the trailer hook;

[0010] a second solenoid valve switch, which is arranged in the vehicle;

[0011] The solenoid valve is electrically connected to the first solenoid valve switch and the second solenoid valve switch, and the gas flow direction between the gas reservoir of the vehicle and the rear axle parking brake air chamber, and between the gas reservoir and the lock valve assembly are switched through the solenoid valve, wherein:

[0012] When towing is required, the trailer hook is inserted into the fixed base and touches the first solenoid valve switch, the solenoid valve is energized, and the gas in the gas reservoir flows to the locking valve assembly through the solenoid valve, the locking valve assembly locks the trailer hook, and at the same time, the gas flows to the rear axle parking brake air chamber to open the parking brake;

[0013] When the trailer is released, the solenoid valve is powered off through the second solenoid valve switch, the gas in the lock valve assembly is discharged to the atmosphere through the solenoid valve and the locking state of the trailer hook is released, and the gas in the rear axle parking brake air chamber of the car is discharged to the atmosphere through the solenoid valve to close the parking brake.

[0014] As a further improvement of the present invention, the solenoid valve has port No. 1, port No. 2 and port No. 3, port No. 1 is used to connect to the air storage cylinder, port No. 2 is the air outlet, and port No. 3 is the exhaust port.

[0015] As a further improvement of the present invention, when the solenoid valve is energized, port 1 is connected to port 2, part of the gas in the air cylinder flows into the locking valve assembly through port 2 to lock the trailer hook, and the other part flows into the rear axle parking brake air chamber through port 2 to open the parking brake.

[0016] As a further improvement of the present invention, when the solenoid valve is powered off, port 1 and port 2 are cut off and port 2 is connected to port 3, and the gas in the lock valve assembly and the rear axle parking brake air chamber flows from port 2 to port 3 and is discharged to the atmosphere, so as to release the locking state of the trailer hook by the lock valve assembly and close the parking brake.

[0017] As a further improvement of the present invention, the locking valve assembly includes a valve body seat, a spring and a locking rod. The valve body seat is installed on the side of the fixed base, the locking rod is arranged in the valve body seat and can extend outward, and the spring is located in the valve body seat and always provides a force for the locking rod to retract inward.

[0018] As a further improvement of the present invention, an air intake connector is provided at the end of the valve body seat, and the air intake connector is connected to port No. 2 of the solenoid valve. When the solenoid valve is opened, the air in the air cylinder flows into the air intake connector through port No. 2 of the solenoid valve and pushes the locking rod outward. The locking rod is inserted into the socket of the trailer hook to lock the trailer hook.

[0019] As a further improvement of the present invention, when the solenoid valve is powered off, the locking rod automatically retracts under the action of the spring and releases the locking state of the trailer hook.

[0020] As a further improvement of the present invention, the locking valve assembly also includes a piston, which is movably arranged in the valve body seat, the two ends of the spring are respectively connected to the valve body seat and the piston, and the locking rod is threadedly connected to the piston.

[0021] As a further improvement of the present invention, a sealing ring is provided between the piston and the inner wall of the valve body seat.

[0022] As a further improvement of the present invention, the valve body seat is installed in the through hole on the side of the fixed base through a plug and then fixed by a nut.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. When towing is needed, the vehicle can enter the towing state by simply inserting the towing hook into the fixed base and contacting the first solenoid valve switch to energize it. After towing is completed, the vehicle can end the towing state by simply pressing the second solenoid valve switch to close the solenoid valve. There is no need for personnel to operate the towing hook, or to connect an external air source or manually unscrew the rear axle parking brake air chamber push rod bolt, thus achieving the purpose of electronically controlled operation, with a high degree of automation and more convenient operation, which improves the efficiency and convenience of towing operations.

[0025] 2. Improved safety: Automated control reduces the uncertainty factors brought by manual operation and improves the safety of the trailer process. At the same time, the control of the solenoid valve ensures the accuracy of the gas flow direction and avoids safety hazards caused by gas path errors;

[0026] 3. Low maintenance cost: Due to the simple design of the device, the additional tools and manpower required for traditional manual trailers are reduced, which reduces maintenance costs. At the same time, the design of the solenoid valve and lock valve assembly makes it easy to maintain and overhaul;

[0027] 4. Strong reliability: The solenoid valve accurately controls the gas flow between the air reservoir, the lock valve assembly, and the rear axle parking brake air chamber, ensuring that each operation can be completed reliably and enhancing the stability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a control principle diagram of the trailer device for electronically controlling the parking release of an electric passenger car according to the present invention;

[0029] Figure 2 It is an exploded view of the fixed base, the lock valve assembly, and the first solenoid valve switch of the present invention;

[0030] Figure 3 is an exploded view of the lock valve assembly of the present invention;

[0031] Figure 4 It is a cross-sectional view of the connection between the lock valve assembly and the fixed base of the present invention;

[0032] Figure 5 is a cross-sectional view of the fixed base of the present invention when it is in contact with the first solenoid valve switch;

[0033] Figure 6 It is a connection schematic diagram of the trailer device for electronically controlling the parking release of an electric bus of the present invention;

[0034] Figure 7 It is the principle diagram of the solenoid valve of the present invention.

[0035] In the figure, 100, fixed base; 110, first solenoid valve switch; 120, trailer hook; 130, lock valve assembly; 131, valve body seat; 132, locking rod; 133, spring; 134, air intake connector; 135, piston; 136, sealing ring; 137, plug; 138, nut; 140, second solenoid valve switch; 150, solenoid valve; 160, air reservoir; 170, rear axle parking brake air chamber. DETAILED DESCRIPTION

[0036] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical method of the present invention, but the present invention is not limited to these embodiments.

[0037] like Figure 1-7 As shown, the present invention provides a trailer device for an electric bus with electronically controlled parking release, comprising:

[0038] A fixed base 100, which is used to be fixed on the vehicle frame and is provided with a first solenoid valve switch 110;

[0039] A trailer hook 120 can be inserted into the fixed base 100 and contact the first solenoid valve switch 110;

[0040] A locking valve assembly 130 , which is disposed on the fixed base 100 and is used to lock or unlock the trailer hook 120 ;

[0041] A second solenoid valve switch 140, which is disposed in the vehicle;

[0042] The solenoid valve 150 is electrically connected to the first solenoid valve switch 110 and the second solenoid valve switch 140, and the gas flow direction between the gas reservoir 160 of the vehicle and the rear axle parking brake air chamber 170, and between the gas reservoir 160 and the lock valve assembly 130 are switched through the solenoid valve 150, wherein:

[0043] When towing is required, the trailer hook 120 is inserted into the fixed base 100 and touches the first solenoid valve switch 110, the solenoid valve 150 is energized, and the gas in the gas reservoir 160 flows to the lock valve assembly 130 through the solenoid valve 150, the lock valve assembly 130 locks the trailer hook 120, and at the same time, the gas flows to the rear axle parking brake air chamber 170 to open the parking brake;

[0044] When the trailer is released, the solenoid valve 150 is de-energized through the second solenoid valve switch 140, the gas in the lock valve assembly 130 is discharged to the atmosphere through the solenoid valve 150 and the locking state of the trailer hook 120 is released, and the gas in the rear axle parking brake air chamber 170 of the vehicle is discharged to the atmosphere through the solenoid valve 150 to close the parking brake.

[0045] That is to say, when towing is needed, the trailer hook 120 only needs to be inserted into the fixed base 100 and contacted with the first solenoid valve switch 110 to be energized, and the vehicle can enter the towing state. After towing is completed, it is only necessary to press the second solenoid valve switch 140 to close the solenoid valve 150, and the vehicle can end the towing state. There is no need for personnel to operate the trailer hook 120, nor is there a need for an external air source or to manually unscrew the push rod bolt of the rear axle parking brake air chamber 170, thereby achieving the purpose of electronically controlled operation, with a high degree of automation and more convenient operation, thereby improving the efficiency and convenience of towing operations.

[0046] In addition, the trailer device has at least the following advantages:

[0047] 1. Improved safety: Automated control reduces the uncertainty factors caused by manual operation and improves the safety of the trailer process. At the same time, the control of the solenoid valve 150 ensures the accuracy of the gas flow direction and avoids safety hazards caused by gas path errors.

[0048] 2. Low maintenance cost: Due to the simple design of the device, the additional tools and manpower required for traditional manual trailers are reduced, thus reducing maintenance costs. At the same time, the design of the solenoid valve 150 and the lock valve assembly 130 makes it easy to maintain and overhaul;

[0049] 3. High reliability: The solenoid valve 150 accurately controls the gas flow between the air reservoir 160, the lock valve assembly 130 and the rear axle parking brake air chamber 170, ensuring that each operation can be completed reliably and enhancing the stability of the system.

[0050] Preferably, the solenoid valve 150 has port 1, port 2 and port 3, port 1 is used to connect the air storage cylinder 160, port 2 is the air outlet, and port 3 is the exhaust port, wherein the working mode of the solenoid valve 150 is as follows:

[0051] When the solenoid valve 150 is energized, port 1 is connected to port 2, part of the gas in the air reservoir 160 flows into the lock valve assembly 130 through port 2 to lock the trailer hook 120, and the other part flows into the rear axle parking brake air chamber 170 through port 2 to open the parking brake, and the vehicle enters the trailer state, thereby improving the efficiency of trailer preparation;

[0052] When the solenoid valve 150 is de-energized, port 1 is cut off from port 2 and port 2 is connected to port 3, and the gas in the locking valve assembly 130 and the rear axle parking brake air chamber 170 flows from port 2 to port 3 and is discharged into the atmosphere, so as to release the locking state of the trailer hook 120 by the locking valve assembly 130 and close the parking brake, so that the vehicle is released from the trailer state.

[0053] By switching the solenoid valve 150 between the power-on and power-off states, the gas flow control between the air reservoir 160 and the lock valve assembly 130 and the rear axle parking brake air chamber 170 is achieved, thereby simplifying the operation process.

[0054] Preferably, the lock valve assembly 130 includes:

[0055] The valve body seat 131, serving as the main frame of the valve lock assembly 130, is installed on the side of the fixed base 100;

[0056] The locking rod 132 is movably disposed in the valve body seat 131 and can be extended outward under the action of gas pressure and inserted into the insertion hole of the trailer hook 120 to lock the trailer hook 120;

[0057] The spring 133 is located in the valve body seat 131 and always provides a force for the locking rod 132 to retract inwardly.

[0058] Specifically, an air inlet connector 134 is provided at the end of the valve body seat 131, and the air inlet connector 134 is connected to the No. 2 port of the solenoid valve 150. When the solenoid valve 150 is opened, the air in the air reservoir 160 flows into the air inlet connector 134 through the No. 2 port of the solenoid valve 150 and pushes the locking rod 132 outward, and the locking rod 132 is inserted into the insertion hole of the trailer hook 120 to lock the trailer hook 120.

[0059] On the contrary, when the solenoid valve 150 is powered off, since the spring 133 is in a stretched state, the locking rod 132 will automatically retract under the action of the spring 133 and release the locking state of the trailer hook 120 .

[0060] Preferably, the lock valve assembly 130 further includes a piston 135, which is movably disposed in the valve body seat 131, the two ends of the spring 133 are respectively connected to the valve body seat 131 and the piston 135, the locking rod 132 is threadedly connected to the piston 135, and a sealing ring 136 is disposed between the piston 135 and the inner wall of the valve body seat 131, wherein:

[0061] The threaded connection between the piston 135 and the locking rod 132 ensures the stability of the position of the locking rod 132 when locked, thereby improving the reliability of locking;

[0062] The design of the sealing ring 136 effectively prevents gas leakage, ensuring that the locking rod 132 can smoothly extend outward and insert into the insertion hole of the trailer hook 120 after ventilation.

[0063] Preferably, the valve body seat 131 is installed in the through hole on the side of the fixed base 100 through the plug 137, and then fixed by the nut 138. The combined use of the plug 137 and the nut 138 ensures that the valve body seat 131 is firmly installed on the fixed base 100, improves the stability of the entire device, and is easy to disassemble.

[0064] The technical means disclosed in the scheme of the present invention are not limited to the technical means disclosed in the above technical means, but also include technical schemes composed of any combination of the above technical features. The above is a specific implementation of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications are also regarded as the protection scope of the present invention.

[0065] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0066] In addition, in the present invention, descriptions such as "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0067] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0068] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A trailer device for electric passenger car with electronically controlled parking release, characterized in that: include: A fixed base, which is used to be fixed on the vehicle frame and is provided with a first solenoid valve switch; A trailer hook, which can be inserted into the fixed base and contact the first solenoid valve switch; a locking valve assembly, which is disposed on the fixed base and is used to lock or unlock the trailer hook; a second solenoid valve switch, which is disposed in the vehicle; The solenoid valve is electrically connected to the first solenoid valve switch and the second solenoid valve switch, and the gas flow direction between the gas reservoir of the vehicle and the rear axle parking brake air chamber, and between the gas reservoir and the lock valve assembly are switched through the solenoid valve, wherein: When towing is required, the trailer hook is inserted into the fixed base and touches the first solenoid valve switch, the solenoid valve is energized, and the gas in the gas reservoir flows to the locking valve assembly through the solenoid valve, the locking valve assembly locks the trailer hook, and at the same time, the gas flows to the rear axle parking brake air chamber to open the parking brake; When the trailer is released, the solenoid valve is powered off through the second solenoid valve switch, the gas in the lock valve assembly is discharged to the atmosphere through the solenoid valve and the locking state of the trailer hook is released, and the gas in the rear axle parking brake air chamber of the car is discharged to the atmosphere through the solenoid valve to close the parking brake.

2. The trailer device for electric passenger car with electronically controlled parking release according to claim 1, characterized in that: The solenoid valve has port 1, port 2 and port 3, port 1 is used to connect to the air storage cylinder, port 2 is the air outlet, and port 3 is the exhaust port.

3. The trailer device for electronically releasing parking of an electric bus according to claim 2, characterized in that: When the solenoid valve is energized, port 1 is connected to port 2, part of the gas in the air reservoir flows into the lock valve assembly through port 2 to lock the trailer hook, and the other part flows into the rear axle parking brake air chamber through port 2 to open the parking brake.

4. The trailer device for electronically releasing parking of an electric bus according to claim 2, characterized in that: When the solenoid valve is powered off, port 1 is cut off from port 2 and port 2 is connected to port 3, and the gas in the lock valve assembly and the rear axle parking brake air chamber flows from port 2 to port 3 and is discharged into the atmosphere, so as to release the locking state of the trailer hook by the lock valve assembly and close the parking brake.

5. The trailer device for electronically releasing parking of an electric bus according to claim 1, characterized in that: The locking valve assembly includes a valve body seat, a spring and a locking rod. The valve body seat is installed on the side of the fixed base. The locking rod is arranged in the valve body seat and can extend outward. The two ends of the spring are respectively connected to the valve body seat and the locking rod.

6. The trailer device for electronically releasing parking of an electric bus according to claim 5, characterized in that: An air intake connector is provided at the end of the valve body seat, and the air intake connector is connected to port No. 2 of the solenoid valve. When the solenoid valve is opened, the air in the air cylinder flows into the air intake connector through port No. 2 of the solenoid valve and pushes the locking rod outward. The locking rod is inserted into the socket of the trailer hook to lock the trailer hook.

7. The trailer device for electric passenger car with electronically controlled parking release according to claim 5, characterized in that: When the solenoid valve is powered off, the locking rod automatically retracts under the action of the spring and releases the locking state of the trailer hook.

8. The trailer device for electronically releasing parking of an electric bus according to claim 5, characterized in that: The locking valve assembly also includes a piston, which is movably disposed in the valve body seat, two ends of the spring are respectively connected to the valve body seat and the piston, and the locking rod is threadedly connected to the piston.

9. The trailer device for electronically releasing parking of an electric bus according to claim 8, characterized in that: A sealing ring is arranged between the piston and the inner wall of the valve body seat.

10. The trailer device for electronically releasing parking of an electric bus according to claim 5, characterized in that: The valve body seat is installed in the through hole on the side of the fixed base through a plug and then fixed by a nut.

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