Brake fluid storage tank alarm lamp test box

Abstract

The utility model discloses a brake fluid storage tank alarm lamp test box, which comprises a box body, a first resistor arranged in the box body, and a luminous tube arranged in the box body and extending to the surface of the box body, a liquid level sensor is arranged in a brake fluid storage tank, and the liquid level sensor comprises a second resistor, a third resistor and a control switch, one end of the first resistor is connected with an external power supply, and the other end of the first resistor sequentially passes through the second resistor and the third resistor and then is grounded; the light-emitting tube is connected in parallel to two ends of the first resistor, the control switch is connected in parallel to two ends of the third resistor, and the resistance of the third resistor is far greater than that of the first resistor; the control switch is located at the bottom of the brake fluid storage tank or close to the bottom of the brake fluid storage tank, the control switch is a magnetic proximity switch, the liquid level sensor is sleeved with a magnetic ring, when the magnetic ring is far away from the magnetic proximity switch, the magnetic proximity switch is switched off, and when the magnetic ring is close to the magnetic proximity switch, the magnetic proximity switch is switched on. The alarm lamp test box is simple to manufacture and exquisite in design.

Description

Technical Field

[0001] The utility model relates to the technical field of testing equipment, in particular to a brake fluid storage tank warning light testing box. Background Art

[0002] The previous brake fluid reservoir tank level sensor was of on-off type, and the warning light could be tested by on-off. However, the new brake fluid reservoir tank level sensor is not of on-off type, but is composed of resistors with different resistance values ​​at the upper and lower positions. Therefore, the test equipment can no longer test the warning light based on on-off, and the warning light test equipment for the level sensor with upper and lower resistor structures needs to be redesigned. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the purpose of the utility model is to provide a brake fluid reservoir warning light test box with a simple structure and exquisite design.

[0004] The purpose of the utility model is achieved by the following technical solutions:

[0005] The utility model provides a brake fluid reservoir warning light test box in a first aspect, which comprises a box body, a first resistor installed in the box body, and a light-emitting tube installed in the box body and extending to the surface of the box body. A liquid level sensor is installed in the brake fluid reservoir, and the liquid level sensor comprises a second resistor, a third resistor and a control switch. One end of the first resistor is used to connect to an external power supply, and the other end of the first resistor is connected to ground after passing through the second resistor and the third resistor in sequence; the light-emitting tube is connected to both ends of the first resistor in parallel, and the control switch is connected to both ends of the third resistor in parallel, and the resistance value of the third resistor is much greater than the resistance value of the first resistor; the control switch is located at the bottom of the brake fluid reservoir or near the bottom, the control switch is a magnetic proximity switch, and a magnetic ring is sleeved on the liquid level sensor itself. When the magnetic ring is away from the magnetic proximity switch, the magnetic proximity switch is disconnected, and when the magnetic ring is close to the magnetic proximity switch, the magnetic proximity switch is closed.

[0006] As an optional embodiment, the first resistor and the second resistor have equal resistance values, and the resistance value of the third resistor is 5 times or more than the resistance value of the first resistor.

[0007] As an optional embodiment, the light-emitting tube is an LED lamp, the positive pole of the LED lamp is connected between the external power supply and one end of the first resistor, and the negative pole of the LED lamp is connected between the other end of the first resistor and one end of the second resistor.

[0008] As an optional embodiment, the box body is provided with a first connection terminal, a second connection terminal, a third connection terminal and a fourth connection terminal, wherein the first connection terminal is used to realize the connection between the first resistor and an external power supply, the inner side of the first connection terminal is connected to one end of the first resistor, and the outer side of the first connection terminal is used to connect to the external power supply; the second connection terminal is used to realize the connection between the first resistor and the second resistor, the inner side of the second connection terminal is connected to the other end of the first resistor, and the outer side of the second connection terminal is used to connect to the end of the second resistor away from the third resistor; the third connection terminal and the fourth connection terminal are used to realize the grounding of the end of the third resistor away from the second resistor, the inner sides of the third connection terminal and the fourth connection terminal are connected by a wire, the outer side of the fourth connection terminal is used to connect to the ground wire, and the outer side of the third connection terminal is used to connect to the end of the third resistor away from the second resistor.

[0009] As an optional embodiment, the second resistor is located on the upper side of the third resistor.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] The utility model cleverly utilizes the characteristics of the magnetic proximity switch. The brake fluid reservoir tank does not need to be added with brake fluid, and an alarm can be sounded when the brake fluid reservoir tank is at a low level, and no alarm can be sounded when the brake fluid reservoir tank is at a high level. Therefore, on the one hand, it can be used to test the performance of the liquid level sensor installed in the brake fluid reservoir tank, and in actual application, it can also be used as an alarm device when the liquid level is low. During the test, it is only necessary to invert the brake fluid reservoir tank, and the warning light test box can be completed by only connecting a first resistor to the warning light. The design is exquisite and the production is simple, and it also simplifies the test process and improves the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model.

[0013] Among them, 10, brake fluid storage tank; 20, box body; 21, first connecting terminal; 22, second connecting terminal; 23, third connecting terminal; 24, fourth connecting terminal. DETAILED DESCRIPTION

[0014] Below, in conjunction with the accompanying drawings and specific implementation methods, the utility model is further described. It should be noted that, under the premise of no conflict, the various embodiments described below or the various technical features can be arbitrarily combined to form a new embodiment. Except for special instructions, the materials and equipment used in this embodiment can be purchased from the market. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar numbers throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0015] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In the description of the present application, "plurality" means two or more, unless otherwise precisely and specifically specified.

[0016] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be connected through an intermediary medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0017] The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0018] The brake fluid reservoir warning light test box provided by the embodiment of the utility model can be used to test the performance of the liquid level sensor installed in the brake fluid reservoir, and can also be used as an alarm device when the liquid level is low in practical application. At the same time, during the test process, the performance of the warning light test box itself can also be tested.

[0019] The liquid level sensor here is composed of resistors with different resistance values ​​at the upper and lower positions, wherein the resistor located on the upper side is recorded as the second resistor R2, and the resistor located on the lower side is recorded as the third resistor R3. Generally, the resistance value of the third resistor R3 will be much larger than the resistance value of the second resistor R2. The "much larger" here is a relative concept. If the resistance value of the third resistor R3 is 5 times or more than the resistance value of the second resistor R2, then the resistance value of the third resistor R3 can be set to be much larger than the resistance value of the second resistor R2.

[0020] Two terminals are drawn out on the liquid level sensor for connecting with an external receiving device, where the receiving device refers to a warning light test box. In other embodiments, a controller or the like may also be connected. The second resistor R2 and the third resistor R3 are connected in series on the connecting line between the two terminals. At the same time, a magnetic proximity switch K is connected in parallel at both ends of the third resistor R3. The magnetic proximity switch K is located at the bottom of the brake fluid reservoir, or near the bottom of the brake fluid reservoir. It cooperates with the magnetic ring sleeved on the liquid level sensor body. When the liquid level of the brake fluid reservoir is high, the magnetic ring is moved away from the magnetic proximity switch K by the buoyancy provided by the brake fluid. At this time, the magnetic proximity switch K is disconnected. When the liquid level of the brake fluid reservoir is low, the magnetic ring is close to the magnetic proximity switch K. At this time, the magnetic proximity switch K is closed.

[0021] Based on the above principle, a brake fluid reservoir warning light test box can be designed. Please refer to Figure 1 As shown, it may include a box body 20, a first resistor R1 installed in the box body, and a light-emitting tube installed in the box body 20 and extending to the surface of the box body 20. The light-emitting tube may select a suitable light source as needed, for example, a light-emitting diode LED (LED lamp) may be selected. Of course, when the box body 20 is a transparent or translucent structure, the light-emitting tube may also be placed in the box body 20.

[0022] One end of the first resistor R1 is used to be connected to an external power supply, and the other end of the first resistor R1 is grounded after passing through the second resistor R2 and the third resistor R3 in sequence; the light-emitting tube is connected in parallel to both ends of the first resistor R1, and the output voltage of the external power supply and the first resistor R1, the second resistor R2 and the third resistor R3 can be set according to the selection of the light-emitting tube to ensure that the light-emitting tube is lit when the magnetic proximity switch K is closed, and the light-emitting tube is not lit when the magnetic proximity switch K is disconnected.

[0023] Therefore, when the magnetic proximity switch K is disconnected, the first resistor R1, the second resistor R2 and the third resistor R3 are connected in series. If the light-emitting tube is not required to light up, the voltage division on the first resistor R1 needs to be very small, which is not enough to drive the light-emitting tube to work. At this time, the resistance value of the third resistor R3 can be set to be much larger than the resistance value of the first resistor R1. When the magnetic proximity switch K is closed, the first resistor R1 and the second resistor R2 are connected in series, and the third resistor R3 is short-circuited. If the light-emitting tube needs to light up, the resistance values ​​of the second resistor R2 and the first resistor R1 can be set according to the output voltage of the light-emitting tube and the external power supply. For example, assuming that the light-emitting tube adopts a light-emitting diode LED, and the conduction voltage of the light-emitting diode LED is 2V, if the output voltage of the external power supply is 5V, the resistance values ​​of the second resistor R2 and the first resistor R1 can be set equal, and the light-emitting diode LED can be driven to work at this time. Of course, in other embodiments, a higher output voltage can also be set, such as 12V.

[0024] It is understandable that if the light emitting diode is a light emitting diode (LED), the positive electrode of the light emitting diode (LED) is connected between the external power supply and one end of the first resistor, and the negative electrode of the light emitting diode (LED) is connected between the other end of the first resistor and one end of the second resistor.

[0025] In order to facilitate the connection and improve the test efficiency, in a preferred embodiment of the utility model, a first connection terminal 21, a second connection terminal 22, a third connection terminal 23 and a fourth connection terminal 24 can be provided on the box body, wherein the first connection terminal 21 is used to realize the connection between the first resistor R1 and the external power supply, the inner side of the first connection terminal 21 (located on one side inside the box body 20, and the inner sides of other connection terminals are similar thereto) is connected to one end of the first resistor, and the outer side of the first connection terminal (located on one side outside the box body 20, and the outer sides of other connection terminals are similar thereto) is used to connect to the external power supply; the second connection terminal 22 is used to realize The first resistor R1 and the second resistor R2 are connected, the inner side of the second connection terminal 22 is connected to the other end of the first resistor R1, and the outer side of the second connection terminal 22 is used to connect to the end of the second resistor R2 away from the third resistor R3; the third connection terminal 23 and the fourth connection terminal 24 are used to realize the grounding of the end of the third resistor R3 away from the second resistor R2, the inner sides of the third connection terminal 23 and the fourth connection terminal 24 are connected by a wire, the outer side of the fourth connection terminal 24 is used to connect the ground wire (i.e., the grounding terminal), and the outer side of the third connection terminal 23 is used to connect to the end of the third resistor R3 away from the second resistor R2.

[0026] During the test, the brake fluid reservoir is in an empty tank state. First, the brake fluid reservoir is placed upright. Since there is no brake fluid, it is considered that the fluid level in the brake fluid reservoir is low. The magnetic ring is close to the magnetic proximity switch K. At this time, the magnetic proximity switch K is closed, the third resistor R3 is short-circuited, and the light-emitting tube is lit. Then the brake fluid reservoir is inverted, and the magnetic ring will rely on its own gravity to move away from the magnetic proximity switch K located at the bottom of the brake fluid reservoir. At this time, the magnetic proximity switch K is disconnected, the third resistor R3 is connected in series with the first resistor R1 and the second resistor R2, and the voltage across the first resistor R1 cannot reach the driving voltage of the light-emitting tube, so the light-emitting tube does not light up.

[0027] If the LED lights up when the brake fluid reservoir is inverted, or the LED does not light up when the brake fluid reservoir is upright, it means that one of the fluid level sensor or the warning light test box is faulty.

[0028] The above-mentioned implementation mode is only a preferred implementation mode of the embodiment of the utility model, and cannot be used to limit the scope of protection of the embodiment of the utility model. Any non-substantial changes and replacements made by technical personnel in this field on the basis of the embodiment of the utility model shall fall within the scope of protection required by the embodiment of the utility model.

Claims

1. A brake fluid reservoir warning light test kit, characterized in that: It includes a box body, a first resistor installed in the box body, and a light-emitting tube installed in the box body and extending to the surface of the box body. A liquid level sensor is installed in the brake fluid storage tank. The liquid level sensor includes a second resistor, a third resistor and a control switch. One end of the first resistor is used to connect to an external power supply, and the other end of the first resistor is connected to the ground after passing through the second resistor and the third resistor in sequence; the light-emitting tube is connected in parallel to the two ends of the first resistor, and the control switch is connected in parallel to the two ends of the third resistor, and the resistance value of the third resistor is much greater than the resistance value of the first resistor; the control switch is located at the bottom of the brake fluid storage tank or near the bottom, and the control switch is a magnetic proximity switch. A magnetic ring is sleeved on the liquid level sensor itself. When the magnetic ring is away from the magnetic proximity switch, the magnetic proximity switch is disconnected, and when the magnetic ring is close to the magnetic proximity switch, the magnetic proximity switch is closed.

2. The brake fluid reservoir warning light test kit according to claim 1, characterized in that: The first resistor and the second resistor have the same resistance value, and the third resistor has a resistance value that is 5 times or more than the first resistor.

3. The brake fluid reservoir warning light test kit according to claim 1, characterized in that: The light-emitting tube is an LED lamp, the positive pole of the LED lamp is connected between the external power supply and one end of the first resistor, and the negative pole of the LED lamp is connected between the other end of the first resistor and one end of the second resistor.

4. The brake fluid reservoir warning light test kit according to claim 1, characterized in that: The box body is provided with a first connection terminal, a second connection terminal, a third connection terminal and a fourth connection terminal, wherein the first connection terminal is used to realize the connection between the first resistor and the external power supply, the inner side of the first connection terminal is connected to one end of the first resistor, and the outer side of the first connection terminal is used to connect to the external power supply; the second connection terminal is used to realize the connection between the first resistor and the second resistor, the inner side of the second connection terminal is connected to the other end of the first resistor, and the outer side of the second connection terminal is used to connect to the end of the second resistor away from the third resistor; the third connection terminal and the fourth connection terminal are used to realize the grounding of the end of the third resistor away from the second resistor, the inner sides of the third connection terminal and the fourth connection terminal are connected by a wire, the outer side of the fourth connection terminal is used to connect the ground wire, and the outer side of the third connection terminal is used to connect to the end of the third resistor away from the second resistor.

5. The brake fluid reservoir warning light test kit according to any one of claims 1 to 4, characterized in that: The second resistor is located on an upper side of the third resistor.

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