Inflation tool and method for air spring of vehicle suspension

Abstract

The invention relates to an inflation tool and method for an air spring of a vehicle suspension. The inflation tool comprises a power supply module, the power supply module is used for outputting direct current voltage matched with working voltage of the vehicle, and the output end of the power supply module is used for being electrically connected with a compressor of the vehicle; the switch control circuit comprises a plurality of control units which are in one-to-one correspondence with a plurality of air springs of a suspension of the vehicle; the input ends of the multiple control units are electrically connected with the output end of the power supply module, and the output ends of the control units are used for being electrically connected with electromagnetic valves of the corresponding air springs. And the control unit is configured to operably enable the electromagnetic valve of the corresponding air spring to be electrically connected or disconnected with the power supply module. The inflation tool can be used for conveniently and reliably inflating the air spring of the suspension in the after-sale maintenance of a vehicle, and is small in size, easy to operate, low in cost and easy to produce in batches.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle maintenance tools, and in particular to an inflation tool and method for an air spring of a vehicle suspension. Background Art

[0002] Air springs are important components in the vehicle's suspension structure. During vehicle assembly, air springs are usually inflated in the final assembly workshop. During normal vehicle use, air springs can also be inflated through the inflation system configured on the vehicle.

[0003] During the after-sales maintenance of the vehicle, it is sometimes necessary to inflate the air spring. However, after-sales maintenance of the vehicle is usually carried out at a repair shop, and it is not convenient to return to the assembly workshop for inflation. Moreover, the entire vehicle is in a power-off state when it is being repaired, so the inflation system configured on the vehicle is also in a power-off state, making it impossible to use the vehicle's own inflation system to inflate the air spring. Therefore, maintenance personnel usually manually open the inflation port of the air spring, use an external inflation pump to inflate the air spring, and promptly seal the inflation port after inflation. This operation is very inconvenient, and if the sealing operation is not timely, it is prone to leakage. Summary of the invention

[0004] Based on this, it is necessary to provide an inflation tool and method for the air spring of a vehicle suspension in view of the problem that in the prior art, during the after-sales maintenance of the vehicle, maintenance personnel usually manually open the inflation port of the air spring, use an external air pump to inflate the air spring, and promptly seal the inflation port after filling. The operation is very inconvenient, and if the sealing operation is not timely, it is easy to leak.

[0005] An inflation tool for an air spring of a vehicle suspension, the inflation tool comprising:

[0006] A power supply module, the power supply module is used to output a DC voltage matching the working voltage of the vehicle, and the output end of the power supply module is used to be electrically connected to the compressor of the vehicle;

[0007] A switch control circuit comprises a plurality of control units, wherein the plurality of control units correspond one to one with the plurality of air springs of the suspension of the vehicle; the input ends of the plurality of control units are electrically connected to the output end of the power supply module, and the output end of each control unit is used to be electrically connected to the corresponding solenoid valve of the air spring; wherein the control unit is configured to be operable to electrically connect or disconnect the corresponding solenoid valve of the air spring with the power supply module.

[0008] In one embodiment, the control unit includes a first switch and a second switch; the control unit is configured so that when the first switch and the second switch are both closed, the control unit can output a first current to the corresponding solenoid valve of the air spring; when the first switch is closed and the second switch is open, the control unit can output a second current to the corresponding solenoid valve of the air spring, and the second current is smaller than the first current.

[0009] In one embodiment, the control unit includes: a main circuit, a first branch and a second branch in parallel; the first switch is provided on the main circuit, the first branch is provided with a first resistor, and the second branch is provided with a second resistor and the second switch in series; one end of the first branch and one end of the second branch are electrically connected to one end of the main circuit.

[0010] In one embodiment, the inflation tool also includes a first electrical connector, which has a plurality of first conductive units spaced apart from each other, and the output end of each of the control units is electrically connected to the first conductive unit one by one through a wire; the first electrical connector is used to mate with the solenoid valve connector on the vehicle so that each of the first conductive units is electrically connected to each of the solenoid valves one by one.

[0011] In one embodiment, the inflation tool further comprises a second electrical connector, which is electrically connected to an output end of the power supply module via a wire, and the second electrical connector is used to mate with a power connector on the compressor.

[0012] In one embodiment, the inflation tool further comprises a relay, an input end of the relay is connected to an output end of the power supply module, and an output end of the relay is used to be electrically connected to a compressor of the vehicle.

[0013] In one embodiment, the inflation tool further includes a third electrical connector, which is electrically connected to the output end of the power supply module via a wire, and is used to mate with the power interface of the exhaust valve on the compressor.

[0014] In one embodiment, the power supply module is a direct current power supply; or, the power supply module is a voltage conversion device, which is used to convert the input AC voltage of the mains into the direct current voltage output.

[0015] A method for inflating an air spring of a vehicle suspension, using the inflation tool described in any one of the above embodiments, the inflation method comprising the following steps:

[0016] For the air spring that needs to be inflated, operate its corresponding control unit so that the solenoid valve of the air spring that needs to be inflated is electrically connected with the power supply module, so as to drive the solenoid valve of the air spring that needs to be inflated to open;

[0017] The compressor inflates the air spring to be inflated through the solenoid valve;

[0018] After the inflation is completed, the control unit corresponding to the air spring to be inflated is operated to disconnect the solenoid valve of the air spring to be inflated from the power supply module, so that the solenoid valve of the air spring to be inflated is closed.

[0019] In one embodiment, the step of operating the corresponding control unit of the air spring to be inflated so that the solenoid valve of the air spring to be inflated is electrically connected to the power supply module to drive the solenoid valve of the air spring to be inflated to open includes:

[0020] For the air spring to be inflated, the first switch of the control unit corresponding to the air spring is closed, so that the control unit outputs a first current to the solenoid valve of the air spring to be inflated, so as to drive the solenoid valve of the air spring to be inflated to open through the first current;

[0021] The second switch of the control unit corresponding to the air spring to be inflated is disconnected, so that the control unit outputs a second current to the solenoid valve of the air spring to be inflated, so as to maintain the solenoid valve of the air spring to be inflated in an open state through the second current.

[0022] The above-mentioned inflation tool and method, in the process of after-sales maintenance of the vehicle, for the air spring that needs to be inflated, by manually operating its corresponding control unit, the solenoid valve of the air spring that needs to be inflated is electrically connected with the power supply module, so that the solenoid valve of the air spring that needs to be inflated is opened due to the power-on, and then the compressor can inflate the air spring that needs to be inflated through the solenoid valve of the air spring that needs to be inflated. After the inflation is completed, the electrical connection between the solenoid valve of the air spring and the power supply module can be disconnected by manually operating the control unit, so that the solenoid valve is closed due to power failure to prevent the air spring from leaking. In this way, the air spring of the suspension can be conveniently and reliably inflated during the after-sales maintenance of the vehicle, which solves the current situation that there is no inflation tool available for the air spring during the after-sales maintenance of the vehicle, and fills the gap in the field of after-sales maintenance of the vehicle. Moreover, the above-mentioned inflation tool mainly consists of a power supply module and a switch control circuit, which is small in size, easy to operate, low in cost, and easy to mass produce. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The figure is a schematic diagram of the connection relationship between an inflation tool of an embodiment and a compressor of a vehicle and a solenoid valve of an air spring.

[0024] Figure 2 This is a module schematic diagram of the connection relationship between a power supply module, a control unit, and a solenoid valve of an air spring in one embodiment.

[0025] Figure 3 The figure is a schematic diagram of a connection circuit between a control unit and a solenoid valve of an air spring according to an embodiment.

[0026] Explanation of the accompanying drawings: 1. compressor; 2. solenoid valve; 10. power supply module; 20. control unit; 21. first switch; 22. second switch; 23. first resistor; 24. second resistor; 30. first electrical connector; 40. second electrical connector; 50. third electrical connector; 60. exhaust valve switch; 70. compressor switch; 80. main switch; 90. circuit board. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0028] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0029] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0030] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated 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 an electrical connection between two elements or an interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0031] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0032] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0033] Please refer to Figure 1 and Figure 2 According to one embodiment of the present application, there is provided an inflation tool for an air spring of a vehicle suspension (hereinafter referred to as an inflation tool), the inflation tool comprising: a power supply module 10 and a switch control circuit. The power supply module 10 is used to output a DC voltage that matches the working voltage of the vehicle, and the output end of the power supply module 10 is used to be electrically connected to the compressor 1 of the vehicle. The switch control circuit comprises a plurality of control units 20, and the plurality of control units 20 correspond one-to-one to the plurality of air springs of the vehicle's suspension. The input ends of the plurality of control units 20 are all electrically connected to the output end of the power supply module 10, and the output end of each control unit 20 is used to be electrically connected to the solenoid valve 2 of the corresponding air spring. The control unit 20 is configured to be operable to electrically connect or disconnect the solenoid valve 2 of the corresponding air spring with the power supply module 10.

[0034] When the above-mentioned inflation tool is used in the after-sales maintenance process of the vehicle, the power supply module 10 is used to output a DC voltage that matches the working voltage of the vehicle, so that the power supply module 10 can provide a matching working voltage for the compressor 1 of the vehicle and the solenoid valve 2 of the air spring. The output end of the power supply module 10 is electrically connected to the compressor 1 of the vehicle, and is used to power the compressor 1 to drive the compressor 1 to work. A plurality of control units 20 correspond one-to-one to a plurality of air springs of the suspension of the vehicle, and the control unit 20 can be manually operated to control the opening or closing of the solenoid valve 2 of the corresponding air spring. The input ends of the plurality of control units 20 are all electrically connected to the output end of the power supply module 10, and the output end of each control unit 20 is respectively used to be electrically connected to the solenoid valve 2 of the corresponding air spring. For the air spring that needs to be inflated, the corresponding control unit 20 is manually operated to make the solenoid valve 2 of the air spring that needs to be inflated electrically connected with the power supply module 10, so that the solenoid valve 2 of the air spring that needs to be inflated is opened due to power on, and then the compressor 1 can inflate the air spring that needs to be inflated through the solenoid valve 2 of the air spring that needs to be inflated. After the inflation is completed, the solenoid valve 2 of the air spring and the power supply module 10 can be disconnected electrically by manually operating the control unit 20, so that the solenoid valve 2 is closed due to power failure to prevent the air spring from leaking. It can be seen that the above-mentioned inflation tool can conveniently and reliably inflate the air spring of the suspension during the after-sales maintenance of the vehicle, which solves the current situation that there is no inflation tool available for the air spring during the after-sales maintenance of the vehicle, and fills the gap in the field of after-sales maintenance of the vehicle. Moreover, the above-mentioned inflation tool mainly consists of the power supply module 10 and the switch control circuit, which is small in size, easy to operate, low in cost, and easy to mass produce.

[0035] The suspension of a vehicle generally includes four air springs. In the embodiment of the present application, the number of the control units 20 corresponds to that of the air springs, that is, four. In other embodiments, the control units may be designed to be other numbers according to the maintenance requirements of the vehicle, not limited to four.

[0036] Please refer to Figure 1 and Figure 3 In one embodiment, the control unit 20 includes a first switch 21 and a second switch 22. The control unit 20 is configured such that when the first switch 21 and the second switch 22 are both closed, the control unit 20 can output a first current to the corresponding solenoid valve 2 of the air spring, and the first current can drive the solenoid valve 2 to open. When the first switch 21 is closed and the second switch 22 is open, the control unit 20 can output a second current to the corresponding solenoid valve 2 of the air spring, and the second current can maintain the solenoid valve 2 in an open state. The second current is less than the first current.

[0037] The solenoid valve 2 of the air spring of the vehicle suspension is usually a relay-controlled solenoid valve, that is, the solenoid valve is driven to open by providing input to the relay. In this embodiment, for the air spring to be inflated, when operating the corresponding control unit 20, the first switch 21 and the second switch 22 can be closed first, so that the control unit 20 outputs a first current to the solenoid valve 2 of the corresponding air spring. The first current (than the second current) is larger, and its size can make the relay corresponding to the solenoid valve 2 quickly drive the solenoid valve 2 to open, so that the compressor 1 can inflate the air spring through the solenoid valve 2.

[0038] After the solenoid valve 2 is opened, the second switch 22 can be opened, and the first switch 21 remains closed. At this time, the current output by the control unit 20 to the solenoid valve 2 of the corresponding air spring becomes the second current. The second current is small, and the state of the relay can be maintained to keep the solenoid valve 2 in the open state, thereby maintaining the solenoid valve 2 in the open state and avoiding damage caused by long-term operation of the solenoid valve 2 under high current during the inflation process.

[0039] In one embodiment, in the default state of the charging tool, the first switch 21 is in a normally closed state, and the second switch 22 is in a normally open state. Therefore, for the air spring to be inflated, when operating the corresponding control unit 20, first manually close the first switch 21, then both the first switch 21 and the second switch 21 are closed, and then manually open the second switch 22, then the second switch 22 is opened, and the first switch 21 is closed, and the second switch 22 is opened and remains closed.

[0040] In other embodiments, a single control unit may also include only one switch, and the solenoid valve of the air spring and the power supply module are electrically connected or disconnected by operating the switch to be closed or opened.

[0041] Please refer to Figure 3 In one embodiment, the control unit 20 includes: a main circuit, a first branch circuit, and a second branch circuit. The first branch circuit and the second branch circuit are connected in parallel. A first switch 21 is provided on the main circuit, a first resistor 23 is provided on the first branch circuit, and a second resistor 24 and a second switch 22 are provided in series on the second branch circuit. One end of the first branch circuit and one end of the second branch circuit are electrically connected to one end of the main circuit circuit.

[0042] In this embodiment, the other end of the main circuit is connected to the output end of the power supply module 10, and the other end of the first branch circuit and the other end of the second branch circuit are electrically connected to the solenoid valve 2 of the corresponding air spring.

[0043] When the first switch 21 and the second switch 22 are both closed, the first resistor 23 and the second resistor 24 in the control unit 20 work in parallel, and the current in the main circuit is the first current, that is, the control unit 20 outputs the first current to the corresponding electromagnetic valve 2 of the air spring. When the first switch 21 is closed and the second switch 22 is open, the first resistor 23 in the control unit 20 works, while the second resistor 24 does not work, and the current in the main circuit, that is, the current in the first branch, is the second current, that is, the control unit 20 outputs the second current to the corresponding electromagnetic valve 2 of the air spring. Through the circuit setting method of the control unit 20 of this embodiment, it is simple and easy to operate to realize that the control unit 20 outputs the first current and the second current respectively.

[0044] In one embodiment, the first resistor 23 is 6.8Ω, the second resistor 24 is 3Ω, the first current is 1.9A, and the second current is 1.2A.

[0045] In other embodiments, the control unit is not limited to the above-mentioned form, and may also be designed as other circuit forms, which is not limited thereto.

[0046] Please refer to Figure 1 In one embodiment, the inflatable tool further comprises a circuit board 90, and the switch control circuit is arranged on the circuit board 90. Specifically, each control unit 20 is arranged on the circuit board 90, respectively.

[0047] Please refer to Figure 1 In one embodiment, the inflator further comprises a first electrical connector 30, the first electrical connector 30 having a plurality of mutually spaced first conductive units, the output ends of each control unit 20 being electrically connected to the first conductive units via wires one by one. The first electrical connector 30 is used to be plugged and matched with the solenoid valve connector on the vehicle, so that each first conductive unit is electrically connected to each solenoid valve 2 one by one.

[0048] The solenoid valve connector has a plurality of mutually spaced mating conductive units, and each mating conductive unit is electrically connected to each solenoid valve 2 in a one-to-one correspondence. The first electrical connector 30 and the solenoid valve connector are plug-in connectors that are plugged in and matched with each other. In this way, as long as the first electrical connector 30 is plugged in and matched with the solenoid valve connector on the vehicle, the first conductive unit can be electrically connected to each mating conductive unit in a one-to-one correspondence. In addition, since the output end of each control unit 20 is electrically connected to the first conductive unit in a one-to-one correspondence through a wire, each mating conductive unit is electrically connected to each solenoid valve 2 in a one-to-one correspondence, so that the output end of each control unit 20 can be electrically connected to each solenoid valve 2 in a one-to-one correspondence, thereby facilitating the rapid electrical connection of the output end of each control unit 20 with each solenoid valve 2 in a one-to-one correspondence during the after-sales maintenance of the vehicle. Specifically, the first conductive unit can be any structural form such as a pin, a socket, a contact, a pin, etc., as long as the first electrical connector 30 can be plugged in and matched with the solenoid valve connector on the vehicle.

[0049] Please refer to Figure 1 In one embodiment, the inflation tool further includes a second electrical connector 40 , which is electrically connected to the output end of the power supply module 10 through a wire, and the second electrical connector 40 is used to mate with the power connector on the compressor 1 .

[0050] The second electrical connector 40 and the power connector on the compressor 1 are plug-in connectors that are plugged in and matched with each other. In this way, as long as the second electrical connector 40 is plugged in and matched with the power connector on the compressor 1, the output end of the power supply module 10 can be electrically connected to the power connector on the compressor 1, thereby facilitating rapid power supply to the compressor 1 during after-sales maintenance of the vehicle.

[0051] In one embodiment, the inflator further includes a relay, the input end of the relay is connected to the output end of the power supply module 10, and the output end of the relay is used to be electrically connected to the compressor 1 of the vehicle. In this way, a relay is provided between the compressor 1 and the power supply module 10. If the power supply current of the power supply module 10 to the compressor 1 is too large, the relay can cut off the circuit in time to prevent the compressor 1 from being damaged by the excessive current.

[0052] Specifically in this embodiment, the relay can be arranged between the power supply module 10 and the second connector 40 , so that when the second electrical connector 40 is electrically connected to the power connector on the compressor 1 , the relay can be located between the compressor 1 and the power supply module 10 .

[0053] According to the working principle of the compressor 1, before starting the compressor 1 to inflate the air spring, the compressor 1 can be exhausted through the exhaust valve. After the compressor 1 is exhausted, the compressor 1 can be started to inflate the air spring to ensure the normal use of the compressor 1.

[0054] In one embodiment, the inflation tool further includes a third electrical connector 50 , which is electrically connected to the output end of the power supply module 10 via a wire, and the third electrical connector 50 is used to mate with the power interface of the exhaust valve on the compressor 1 .

[0055] The third electrical connector 50 and the power interface of the exhaust valve on the compressor 1 are plug-in connectors that are plugged in and matched with each other. In this way, as long as the third electrical connector 50 is plugged in and matched with the power interface of the exhaust valve on the compressor 1, the output end of the power supply module 10 can be electrically connected to the power interface of the exhaust valve on the compressor 1, thereby facilitating the rapid power supply to the exhaust valve on the compressor 1 during after-sales maintenance of the vehicle.

[0056] Please refer to Figure 1In one embodiment, the inflatable tool includes a main switch 80. The main switch 80 is used to control the output of the power supply module 10. The power supply module 10 is connected to the switch control circuit and the compressor 1 through the main switch 20. After the main switch 80 is turned on, the power supply module 10 can supply power to the compressor 1 and the solenoid valve 2. When the main switch 80 is turned off, the compressor 1 and the solenoid valve 2 cannot be powered.

[0057] Please refer to Figure 1 In one embodiment, the inflator comprises a compressor switch 60, and the compressor switch 60 is used to control the start and stop of the compressor 1. Specifically, the compressor switch 60 can be arranged between the power supply module 10 and the second connector 40.

[0058] Please refer to Figure 1 In one embodiment, the inflator comprises an exhaust valve switch 70, and the exhaust valve switch 70 is used to control the start and close of the exhaust valve of the compressor 1. Specifically, the exhaust valve switch 70 can be arranged between the power supply module 10 and the third connector 50.

[0059] In one embodiment, the power supply module 10 is a voltage conversion device for converting the input AC voltage of the mains into a DC voltage output. The voltage conversion device is, for example, a power DC switching power supply. Specifically, it can be a 12V, 40A, 500W power DC switching power supply.

[0060] The input end of the power supply module 10 adopts a three-phase plug, a neutral line, a live line, and a ground line to ensure power safety. The input end of the power supply module 10 can be connected to 220V AC power, and the power supply module 10 can convert 220V AC power into 12V DC voltage output.

[0061] In other embodiments, the power supply module 10 may also be a DC power supply, such as a 12V DC power supply. In this way, the compressor 1 and the solenoid valve 2 can be powered without being connected to the mains. The DC power supply may specifically be a portable vehicle power supply, a battery, and the like.

[0062] An embodiment of the present application provides a method for inflating an air spring of a vehicle suspension, using an inflation tool of any of the above embodiments. The inflation method comprises the following steps:

[0063] S10: for the air spring to be inflated, operating the corresponding control unit 20, so that the solenoid valve of the air spring to be inflated is electrically connected with the power supply module 10, so as to drive the solenoid valve 2 of the air spring to be inflated to open;

[0064] S20: The compressor 1 inflates the air spring to be inflated through the solenoid valve 2;

[0065] S30: After the inflation is completed, the control unit 20 corresponding to the air spring to be inflated is operated to disconnect the solenoid valve of the air spring to be inflated from the power supply module 10, so that the solenoid valve 2 of the air spring to be inflated is closed.

[0066] The above-mentioned inflation method, for the air spring to be inflated, manually operates the corresponding control unit 20, so that the solenoid valve 2 of the air spring to be inflated is electrically connected with the power supply module 10, so that the solenoid valve 2 of the air spring to be inflated is opened due to power-on, and then the compressor 1 can inflate the air spring to be inflated through the solenoid valve 2 of the air spring to be inflated. After the inflation is completed, the control unit 20 can be manually operated to disconnect the electrical connection between the solenoid valve 2 of the air spring and the power supply module 10, so that the solenoid valve 2 is closed due to power failure to prevent the air spring from leaking. It can be seen that the above-mentioned inflation method can conveniently and reliably inflate the air spring of the suspension during the after-sales maintenance of the vehicle.

[0067] In one embodiment, step S10 includes:

[0068] S11: For the air spring to be inflated, the first switch 21 of the corresponding control unit 20 is closed, so that the control unit 20 outputs a first current to the solenoid valve 2 of the air spring to be inflated, so as to drive the solenoid valve 2 of the air spring to be inflated to open through the first current.

[0069] S12: The second switch 22 of the control unit 20 corresponding to the air spring to be inflated is turned off, so that the control unit 20 outputs a second current to the solenoid valve 2 of the air spring to be inflated, so as to maintain the solenoid valve 2 of the air spring to be inflated in an open state through the second current.

[0070] In one embodiment, step S20 includes: after the inflation is completed, the first switch 21 is turned off, so that the solenoid valve of the air spring to be inflated is disconnected from the power supply module 10, so that the solenoid valve 2 of the air spring to be inflated is closed.

[0071] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0072] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A tool for inflating an air spring of a vehicle suspension, It is characterized in that The inflation tool comprises: A power supply module, the power supply module is used to output a DC voltage matching the working voltage of the vehicle, and the output end of the power supply module is used to be electrically connected to the compressor of the vehicle; A switch control circuit comprises a plurality of control units, wherein the plurality of control units correspond one to one with the plurality of air springs of the suspension of the vehicle; the input ends of the plurality of control units are electrically connected to the output end of the power supply module, and the output end of each control unit is used to be electrically connected to the corresponding solenoid valve of the air spring; wherein the control unit is configured to be operable to electrically connect or disconnect the corresponding solenoid valve of the air spring with the power supply module.

2. The inflatable tool according to claim 1, It is characterized in that The control unit includes a first switch and a second switch; the control unit is configured so that when the first switch and the second switch are both closed, the control unit can output a first current to the corresponding solenoid valve of the air spring; when the first switch is closed and the second switch is open, the control unit can output a second current to the corresponding solenoid valve of the air spring, and the second current is smaller than the first current.

3. The inflatable tool according to claim 2, It is characterized in that The control unit includes: a main circuit, a first branch circuit and a second branch circuit connected in parallel; the first switch is arranged on the main circuit, the first resistor is arranged on the first branch circuit, and the second resistor and the second switch are arranged in series on the second branch circuit; one end of the first branch circuit and one end of the second branch circuit are electrically connected to one end of the main circuit circuit.

4. The inflatable tool according to claim 1, It is characterized in that It also includes a first electrical connector, which has a plurality of first conductive units spaced apart from each other, and the output end of each control unit is electrically connected to the first conductive unit one by one through a wire; the first electrical connector is used to mate with the solenoid valve connector on the vehicle so that each of the first conductive units is electrically connected to each of the solenoid valves one by one.

5. The inflatable tool according to claim 1, It is characterized in that It also includes a second electrical connector, which is electrically connected to the output end of the power supply module through a wire, and is used to plug and mate with the power connector on the compressor.

6. The inflatable tool according to claim 5, It is characterized in that It also includes a relay, the input end of the relay is connected to the output end of the power supply module, and the output end of the relay is used to be electrically connected to the compressor of the vehicle.

7. The inflatable tool according to claim 1, It is characterized in that It also includes a third electrical connector, which is electrically connected to the output end of the power supply module through a wire, and is used to plug and match with the power interface of the exhaust valve on the compressor.

8. The inflatable tool according to claim 1, It is characterized in that The power supply module is a direct current power supply; or, the power supply module is a voltage conversion device, which is used to convert the input AC voltage of the mains into the direct current voltage output.

9. A method for inflating an air spring of a vehicle suspension, It is characterized in that Using the inflation tool according to any one of claims 1 to 8, the inflation method comprises the following steps: For the air spring that needs to be inflated, operate its corresponding control unit so that the solenoid valve of the air spring that needs to be inflated is electrically connected with the power supply module, so as to drive the solenoid valve of the air spring that needs to be inflated to open; The compressor inflates the air spring to be inflated through the solenoid valve; After the inflation is completed, the control unit corresponding to the air spring to be inflated is operated to disconnect the solenoid valve of the air spring to be inflated from the power supply module, so that the solenoid valve of the air spring to be inflated is closed.

10. The inflation method according to claim 9, It is characterized in that The step of operating the corresponding control unit of the air spring to be inflated so that the solenoid valve of the air spring to be inflated is electrically connected to the power supply module to drive the solenoid valve of the air spring to be inflated to open includes: For the air spring to be inflated, the first switch of the control unit corresponding to the air spring is closed, so that the control unit outputs a first current to the solenoid valve of the air spring to be inflated, so as to drive the solenoid valve of the air spring to be inflated to open through the first current; The second switch of the control unit corresponding to the air spring to be inflated is disconnected, so that the control unit outputs a second current to the solenoid valve of the air spring to be inflated, so as to maintain the solenoid valve of the air spring to be inflated in an open state through the second current.

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