Bolt anti-loosening early warning device and vehicle

Abstract

The present application relates to the technical field of bolt anti-loosening, and particularly relates to a bolt anti-loosening early warning device and a vehicle. The bolt anti-loosening early warning device comprises a connecting base body and a bolt fastened on the connecting base body, the bolt anti-loosening early warning device comprises a gasket sleeved on the outside of the bolt and pressed on the surface of the connecting base body by the bolt, and further comprises a micro switch alarm loop and a proximity switch alarm loop. The micro switch alarm loop comprises a micro switch and a micro switch alarm, and the micro switch alarm can be triggered to work when the state of the micro switch changes. The micro switch comprises a top block protruding from the surface of the connecting base body and a spring driving the top block to protrude, and when the bolt loosens, the spring drives the top block to protrude and lift the gasket, and the micro switch switches state. The proximity switch alarm loop comprises a proximity switch and a proximity switch alarm, and the gasket is provided with a trigger part for triggering the proximity switch to make the proximity switch alarm work, and the trigger part can trigger the proximity switch when the bolt loosens and the gasket is displaced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bolt anti-loosening, in particular to a bolt anti-loosening early warning device and a vehicle. BACKGROUND

[0002] With the rapid increase of new energy vehicle products and the rapid development of the market, the performance, function and quality of the parts will be increasingly high. In the next few years, new energy vehicle high-voltage safety protection will become one of the important concerns of many manufacturers. It is particularly important to protect the high-voltage electrical system from accidental damage, overcurrent heating and other factors. The anti-loosening of the high-voltage connector is the key. There are various types of high-voltage connector products, but most of them are connected internally by bolts. For example, the voltage of the high-voltage main circuit of a new energy pure electric sanitation vehicle is generally greater than 200V, and the transient current value is greater than 600-700A. Without considering the motor control stalling current and overload current factors, the starting current of the vehicle under full throttle discharge will produce high temperature or arc at the bolt contact surface and the connector copper plate 5 when the high-voltage connector bolt is loose. When the high-voltage connector flame-retardant protective cover is affected by the arc, the ionization of the insulating medium will be shortened with the passage of time (the arc center temperature is 6000-7000℃), and there will be a certain safety hazard. Under complex temperature and humidity environmental conditions, the natural protection IP level is very low, which affects the safety of the protection and greatly reduces the quality of the customer's subjective experience of the vehicle. Therefore, in view of this high-voltage safety protection problem, it is necessary to prevent it from "burning" and to improve the safety of the protection. A device is needed to early warn the loosening of the bolt.

[0003] A bolt with an alarm function is disclosed in Chinese patent application publication No. CN110094402A. The bolt includes a bolt head and a screw rod. A layer hole is provided on the bolt head. An alarm device and a sliding block are provided in the layer hole. The alarm device is connected to the sliding block through a connecting rod. The alarm device includes a power supply, an alarm and a micro switch. The alarm is electrically connected to the power supply and the micro switch. The power supply is electrically connected to the micro switch. The sliding block is located at the lower part of the layer hole. The sliding block is connected to the step of the layer hole through a spring. The sliding block is connected to the micro switch through the connecting rod. When the bolt and the fastened object are loose, the sliding block drives the connecting rod to quickly connect the fixed contact and the moving contact of the micro switch under the elastic force of the spring, so as to realize the automatic alarm of the alarm device. In addition, the alarm device further includes a single-chip microcomputer and a vibration switch. When the vibration switch detects the slight vibration or displacement of the sliding block, it generates a continuous pulse signal. The single-chip microcomputer controls the alarm to send an alarm signal, realizing double alarm and further improving the reliability of the alarm device.

[0004] The bolt with the alarm function can be applied to a high-voltage connector, and can alarm when the bolt is loose to reduce the occurrence of accidents. However, the bolt with the alarm function has the following defects: the alarm, power supply, micro switch, spring, vibration switch and other structures are integrated in the layer hole of the bolt head, which makes the structure of the bolt head complex, not easy to process, and the process steps of installing the alarm and other structures in the layer hole are also relatively cumbersome. SUMMARY

[0005] The technical problem to be solved by the bolt anti-loose early warning device is to provide a bolt anti-loose early warning device to solve the technical problem that the bolt structure capable of realizing anti-loose early warning in the prior art is complex and not easy to process. The present application also provides a vehicle to solve the above technical problem.

[0006] The technical scheme of the bolt anti-loose early warning device is as follows:

[0007] The bolt anti-loose early warning device comprises a connecting base and a bolt fastened on the connecting base, the bolt anti-loose early warning device comprises a gasket sleeved outside the bolt and pressed on the surface of the connecting base by the bolt, and further comprises a micro switch alarm circuit and a proximity switch alarm circuit. The micro switch alarm circuit comprises a micro switch arranged on the connecting base and a micro switch alarm for alarm, and the micro switch alarm can be triggered to work when the state of the micro switch changes. The micro switch comprises a top block penetrating the surface of the connecting base and a spring for driving the top block to penetrate, and when the bolt is loose, the spring drives the top block to penetrate and lifts the gasket, and the micro switch switches state. The proximity switch alarm circuit comprises a proximity switch arranged on the connecting base and a proximity switch alarm for alarm, and the gasket is provided with a trigger part for triggering the proximity switch to make the proximity switch alarm work, and the trigger part can trigger the proximity switch when the bolt is loose and the gasket is displaced.

[0008] Beneficial effects: when the bolt is loose, the top block of the micro switch is lifted by the spring force, the micro switch alarm loop is connected, the micro switch alarm sends an alarm signal outward, at the same time, since the gasket is lifted by the top block (that is, the gasket is displaced), the proximity switch detects the displacement of the gasket and is triggered, the proximity switch alarm loop is connected, and the proximity switch alarm sends an alarm signal outward. The micro switch alarm loop and the proximity switch alarm loop of the bolt loosening early warning device of the application work in linkage, which improves the reliability of the early warning device. The micro switch, proximity switch and other structures of the bolt loosening early warning device of the application are arranged on the connecting base, which has larger arrangement space, simpler structure and more convenient processing compared with the prior art of integrating the above structures in the bolt. The micro switch and the proximity switch are arranged separately, so that the structure is simpler. Moreover, when the bolt loosening early warning device is applied in a vibrating environment such as a vehicle, even if the micro switch fails and the top block cannot pass out, the vibration will cause the gasket to displace to a certain extent, and at this time the proximity switch can still be triggered and work, which is more reliable.

[0009] Further, the micro switch alarm loop is provided with at least two, and the micro switches on each micro switch alarm loop are arranged around the bolt.

[0010] Beneficial effects: the arrangement of at least two micro switch alarm loops can improve the detection reliability of the early warning device and avoid the phenomenon that a single micro switch failure leads to the failure of the entire early warning device. In addition, the arrangement of at least two micro switches makes it easier to lift the gasket, thereby making the sensitivity of the entire device higher.

[0011] Further, the micro switch alarm of the micro switch on one of the micro switch alarm loops is an alarm lamp arranged on the connecting base, and the micro switch alarm of the micro switch on one of the micro switch alarm loops is an alarm module arranged on the instrument panel, which is used to send an alarm signal when the bolt is loose.

[0012] Beneficial effects: the use of various forms of micro switch alarms enables the early warning device to send various alarm signals outward, thereby enabling the information of the bolt loosening to be received in the first time.

[0013] Further, the proximity switch alarm loop is provided with at least two, and the proximity switches on each proximity switch alarm loop are arranged around the bolt.

[0014] Beneficial effects: the arrangement of at least two proximity switch alarm loops enables the displacement of the gasket to be detected from multiple angles, thereby improving the detection reliability of the early warning device.

[0015] Further, the proximity switch is a Hall proximity switch, and the gasket is a magnetic gasket, and the magnetic gasket constitutes the trigger part as a whole.

[0016] Beneficial effects: the Hall proximity switch has a small structure size, and is convenient to arrange and install.

[0017] The technical scheme of the vehicle of the present application is:

[0018] The vehicle comprises a vehicle body and a connector mounted on the vehicle body, the connector comprises a connecting base and a bolt fastened on the connecting base, the bolt is sleeved with a gasket, and the gasket is pressed on the surface of the connecting base by the bolt; the vehicle further comprises a micro switch alarm circuit and a proximity switch alarm circuit, the micro switch alarm circuit comprises a micro switch arranged on the connecting base and a micro switch alarm for alarm, and the micro switch alarm is triggered to work when the state of the micro switch changes; the micro switch comprises a top block penetrating the surface of the connecting base and a spring for driving the top block to penetrate; when the bolt is loosened, the spring drives the top block to penetrate and lift the gasket, and the micro switch is switched; the proximity switch alarm circuit comprises a proximity switch arranged on the connecting base and a proximity switch alarm for alarm; the gasket is provided with a trigger part for triggering the proximity switch to make the proximity switch alarm work; and the trigger part can trigger the proximity switch when the bolt is loosened and the gasket is displaced.

[0019] Beneficial effects: when the bolt is loosened, the top block of the micro switch lifts the gasket under the action of the spring elastic force, the micro switch alarm circuit is connected, and the micro switch alarm sends out an alarm signal outward; at the same time, the gasket is lifted by the top block (i.e. the gasket is displaced), the proximity switch detects the displacement of the gasket and is triggered, the proximity switch alarm circuit is connected, and the proximity switch alarm sends out an alarm signal outward; the micro switch alarm circuit and the proximity switch alarm circuit of the present application have a linkage double alarm effect, and the reliability of the early warning device in sending out an alarm signal is improved; the structures of the micro switch, the proximity switch and the like are arranged on the connecting base, compared with the prior art of integrating the above structures in the bolt, the arrangement space is larger, the structure is simpler, and the processing is more convenient; the micro switch and the proximity switch are arranged separately, so that the structure is simpler; and even if the micro switch fails and the top block cannot penetrate, the vibration of the vehicle can cause the gasket to displace to a certain extent, and the proximity switch can still be triggered to work, so that the reliability is higher.

[0020] Further, the micro switch alarm circuit is provided with at least two, and the micro switches on the micro switch alarm circuits are arranged around the bolt.

[0021] Beneficial effect: the setting of the at least two microswitch alarm circuits can improve the detection reliability of the early warning device, and avoid the phenomenon that the failure of a single microswitch leads to the failure of the whole early warning device. In addition, the setting of the at least two microswitches makes it easier to lift the gasket, and thus the sensitivity of the whole device is higher.

[0022] Further, the microswitch alarm of one of the microswitch alarm circuits is an alarm lamp arranged on the connecting base, and the microswitch alarm of the other of the microswitch alarm circuits is an alarm module arranged on the instrument desk, which is used to send an alarm signal when the bolt is loose.

[0023] Beneficial effect: the use of multiple forms of microswitch alarms makes the early warning device capable of sending multiple alarm signals outward, and thus the information of the loose bolt can be received in the first time.

[0024] Further, the proximity switch alarm circuit is provided with at least two, and the proximity switches of each proximity switch alarm circuit are arranged around the bolt.

[0025] Beneficial effect: the setting of the at least two proximity switch alarm circuits makes it possible to detect the displacement of the gasket from multiple angles, and thus the detection reliability of the early warning device is improved.

[0026] Further, the proximity switch is a Hall proximity switch, and the gasket is a magnetic gasket, which constitutes the trigger part as a whole.

[0027] Beneficial effect: the Hall proximity switch has a small structure size, and is convenient to arrange and install. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a structural schematic view in the bolt loosening early warning device embodiment 1 of the application;

[0029] Figure 2 is Figure 1 a sectional view at A-A in the bolt loosening early warning device embodiment 1 of the application;

[0030] Figure 3 is a principle diagram in the bolt loosening early warning device embodiment 1 of the application;

[0031] Figure 4 is Figure 3 a top view at the bolt in the bolt loosening early warning device embodiment 1 of the application.

[0032] 1, bolt; 2, high-voltage connector; 3, connecting base; 4, threaded steel sleeve; 5, connector copper plate; 6, gasket; 7, spring washer; 8, micro switch; 9, power supply; 10, first micro switch alarm loop; 11, second micro switch alarm loop; 12, light-emitting diode; 13, top block; 14, spring; 15, top rod; 16, movable contact; 17, Hall proximity switch; 18, first proximity switch alarm loop; 19, second proximity switch alarm loop; 20, buzzer; 21, choke resistor; 22, dim light. DETAILED DESCRIPTION

[0033] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application, i.e., the described embodiments are only some of the embodiments of the present application, but not all the embodiments. The components of the embodiments of the present application generally described and shown in the accompanying drawings can be arranged and designed in various different configurations.

[0034] Therefore, the detailed description of the embodiments of the present application provided below in the accompanying drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative efforts fall within the scope of the present application.

[0035] It should be noted that in the specific embodiments of the present application, the relationship terms such as "first" and "second" and the like that may appear are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is such actual relationship or order between the entities or operations. Moreover, the terms such as "include", "contain" or any other variants that may appear are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. The limiting elements that may appear, such as "including a", do not exclude the presence of other identical elements in the process, method, article or device including the elements, without more limitations.

[0036] In the description of the present application, unless otherwise explicitly specified and limited, the terms such as "mounting", "connection", "linking" should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be direct connection, or indirect connection through intermediate medium, or can be internal communication of two elements. 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.

[0037] In the description of the present application, unless otherwise explicitly specified and limited, the term "provided with" can be understood in a broad sense, for example, the object of "provided with" can be part of the body, or arranged separately from the body and connected to the body, which connection can be detachable or non-detachable. 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.

[0038] The present application is further described in detail below in combination with embodiments.

[0039] Embodiment 1 of the bolt anti-loosening early warning device provided in the present application:

[0040] In this embodiment, the bolt anti-loosening early warning device is applied to a high-voltage connector 2 of a vehicle, as shown in Figures 1 to 4 The bolt anti-loosening early warning device includes a connecting base body 3 of the high-voltage connector 2 and a bolt 1 fastened to the connecting base body 3, the connecting base body 3 is provided with a bolt hole, and a thread steel sleeve 4 is arranged in the bolt hole, the thread steel sleeve 4 is used for thread connection with the bolt 1 to realize fastening connection of the bolt 1 and the connecting base body 3, and the connecting base body 3 is provided with a connector copper plate 5 on the surface.

[0041] The bolt 1 is externally sleeved with a gasket 6 and a spring pad 7, when the bolt 1 is fastened to the connecting base body 3, the gasket 6 and the spring pad 7 are pressed against the surface of the connector copper plate 5. The gasket 6 can increase the acting area of the bolt 1 on the connector copper plate 5 to reduce the pressure intensity of the connector copper plate 5, and the spring pad 7 can exert a spring force on the bolt 1 along the axial direction of the bolt 1 to increase the stress at the connecting thread between the bolt 1 and the thread steel sleeve 4, thereby making the connection of the bolt 1 and the thread steel sleeve 4 more fastened.

[0042] In order to realize the early warning of the loosening of the bolt 1, the bolt loosening early warning device further comprises a micro switch alarm loop, the micro switch alarm loop comprises a micro switch 8 arranged on the connecting base body 3, a micro switch alarm for alarm and a power supply 9 for power supply. In the embodiment, the micro switch alarm loop is provided with two, which are a first micro switch alarm loop 10 and a second micro switch alarm loop 11, and the micro switches 8 of the two micro switch alarm loops are arranged symmetrically around the circumference of the bolt 1. The micro switch 8 can control the on-off of the corresponding loop, and when the bolt 1 loosens, the micro switch 8 controls the corresponding loop to be turned on to make the corresponding micro switch alarm start, and then the micro switch alarm sends an alarm signal outward.

[0043] It should be noted that the micro switch alarm in the first micro switch alarm loop 10 is an alarm lamp, specifically a light emitting diode 12, and when the first micro switch alarm loop 10 is turned on, the light emitting diode 12 lights up to send an alarm signal. The micro switch alarm in the second micro switch alarm loop 11 is integrated on the alarm module in the cab instrument panel, specifically, the alarm module in the instrument panel is a twilight lamp 22, and when the second micro switch alarm loop 11 is turned on, the twilight lamp 22 in the instrument panel will display an alarm signal. In order to make the light emitting diode 12 easy to be perceived when it lights up, the shell of the high-voltage connector 2 needs to have a transparent part, so that the light emitting diode 12 can be observed through the transparent part of the shell.

[0044] The micro switch 8 is a common structure in the prior art, which usually comprises a top block 13, a spring 14, a top rod 15 connected with the top block 13 and a moving contact 16 connected with the top rod 15, and the top block 13 penetrates out of the surface of the connecting base body 3 and the connector copper plate 5 to be top-pressed with the gasket 6. Taking the first micro switch alarm loop 10 as an example, when the bolt 1 is not loosened, the gasket 6 presses the top block 13, at this time the moving contact 16 is in a disconnected state (i.e. the micro switch 8 is in a disconnected state), the first micro switch alarm loop 10 is in a disconnected state, and the light emitting diode 12 is not lit. When the bolt 1 loosens, the top block 13 will lift the gasket 6 under the action of the spring 14, and the top rod 15 connected with the top block 13 will drive the moving contact 16 to move, so that the moving contact 16 changes from the disconnected state to the closed state (the micro switch 8 changes from the disconnected state to the closed state), at this time the first micro switch alarm loop 10 is in a connected state, and the light emitting diode 12 lights up.

[0045] Further, the bolt loosening early warning device further comprises a proximity switch alarm circuit, the proximity switch alarm circuit comprising a proximity switch arranged on the connecting base body 3, a proximity switch alarm for alarm, and a power supply 9 for power supply. In the embodiment, the proximity switch alarm circuit is provided with two, namely a first proximity switch alarm circuit 18 and a second proximity switch alarm circuit 19, the proximity switches in the two proximity switch alarm circuits are arranged circumferentially symmetrically around the bolt 1, and both of the proximity switches are Hall proximity switches 17.

[0046] In the embodiment, the gasket 6 is a magnetic gasket, which constitutes a trigger part capable of triggering the Hall proximity switch 17 to make the proximity switch alarm work. Specifically, when the gasket 6 is lifted by the top block 13, the Hall proximity switch 17 can detect the movement of the gasket 6, the Hall proximity switch 17 is triggered to make the corresponding proximity switch alarm circuit turn on, thereby making the proximity switch alarm work to send an alarm signal outward. The Hall proximity switch 17 is a common structure in the prior art, and its specific structure and working principle will not be described here. In addition, the proximity switch alarms in the two proximity switch alarm circuits are both buzzer 20 arranged in the cab instrument panel. The Hall proximity switch 17 only needs to be glued to the surface of the connector copper plate 5 during installation.

[0047] It should be noted that the power supply 9 of the first micro switch alarm circuit 10, the second micro switch alarm circuit 11, the first proximity switch alarm circuit 18 and the second proximity switch alarm circuit 19 is a 24VDC constant fire direct current power supply provided by the whole vehicle. In addition, the first micro switch alarm circuit 10 is connected in series with a current limiting resistor 21 to avoid excessive instantaneous current and protect the light emitting diode 12.

[0048] When the vehicle travels for a certain period of time, the driver can observe the light emitting diode 12 in the high-voltage connector 2 shell, the glow lamp 22 in the instrument panel, and the buzzer 20 in the instrument panel according to the established vehicle maintenance period to determine the connection state of the bolt 1 in the high-voltage connector 2. In addition, the signal of the loosened bolt 1 will also be transmitted to the instrument single-chip machine (CPU) in the instrument panel, and after being processed and analyzed by the instrument single-chip machine (CPU), it will be sent to the whole vehicle ECU controller through CAN communication to timely power off the high-voltage system circuit from the electric control strategy to prevent the bolt 1 from being loosened and causing arc damage to the high-voltage connector 2, thereby alarming in the fastest time when the bolt 1 is loosened to reduce the occurrence of accidents and personnel injuries.

[0049] The difference between the bolt anti-loosening early warning device of the embodiment 2 and the embodiment 1 is that, in the embodiment 2, the proximity switch is an optical proximity switch, and in the embodiment 2, a reflective surface for reflection is arranged on the gasket, and the reflective surface constitutes the triggering part of the gasket. Alternatively, in other embodiments, the proximity switch can also be a capacitive proximity switch, and in the embodiment, the gasket constitutes the pole plate of the capacitive proximity switch, and the gasket as a whole constitutes the triggering part.

[0050] The difference between the bolt anti-loosening early warning device of the embodiment 3 and the embodiment 1 is that, the micro switch alarm circuit is provided with one, and the micro switch in the micro switch alarm circuit is arranged at any position in the circumference of the bolt, and the top block of the micro switch needs to be in top pressure cooperation with the gasket. Alternatively, in other embodiments, the micro switch alarm circuit can be provided with three, four or more, and the micro switches of the micro switch alarm circuits are arranged at intervals in the circumference of the bolt.

[0051] The difference between the bolt anti-loosening early warning device of the embodiment 4 and the embodiment 1 is that, the micro switch alarm circuit is provided with two, but the alarms on the two micro switch alarm circuits are the same type of alarms, such as alarm lamps arranged on the connecting base body or alarm modules integrated on the instrument table.

[0052] The difference between the bolt anti-loosening early warning device of the embodiment 5 and the embodiment 1 is that, the proximity switch alarm circuit is provided with one, and the proximity switch in the proximity switch alarm circuit is arranged at any position in the circumference of the bolt 1, and the proximity switch needs to be triggered by the triggering part. Alternatively, in other embodiments, the proximity switch alarm circuit can be provided with three, four or more, and the proximity switches of the proximity switch alarm circuits are arranged at intervals in the circumference of the bolt 1.

[0053] The difference between the bolt anti-loosening early warning device of the embodiment 6 and the embodiment 1 is that, the micro switch is connected in parallel across the alarm in the micro switch alarm circuit, and when the bolt is not loosened, the micro switch remains in a normally closed state, short-circuiting the alarm, so that the alarm cannot work normally; after the bolt is loosened, the micro switch is disconnected, and the alarm works normally.

[0054] The embodiment of the vehicle provided in the application:

[0055] The vehicle comprises a vehicle body and a connector mounted on the vehicle body, the connector comprising a connecting base body and a bolt fastened on the connecting base body, the bolt being externally sleeved with a gasket, and the vehicle further comprises a micro switch alarm circuit and a proximity switch alarm circuit, which have the same structure as the above-described bolt anti-loosening early warning device, and will not be described here.

[0056] The above merely describes preferred embodiments of the present application and is not used to limit the present application, and the patent protection scope of the present application is subject to the claims, and any equivalent structural changes made according to the content of the specification and drawings of the present application should also be included in the protection scope of the present application.

Claims

1. A bolt loosening early warning device comprising a connecting base body (3) and a bolt (1) fastened to the connecting base body (3), characterized in that The bolt anti-loosening early warning device comprises a gasket (6) sleeved outside a bolt (1) and compressed on the surface of a connecting base (3) by the bolt (1), a micro switch alarm loop and a proximity switch alarm loop, the micro switch alarm loop comprises a micro switch (8) arranged on the connecting base (3) and a micro switch alarm for alarm, the micro switch (8) can trigger the micro switch alarm to work when the state of the micro switch (8) changes, the micro switch (8) comprises a top block (13) penetrating the surface of the connecting base (3) and a spring (14) driving the top block (13) to penetrate, when the bolt (1) is loosened, the spring (14) drives the top block (13) to penetrate and lift the gasket (6) and switch the state of the micro switch (8); the proximity switch alarm loop comprises a proximity switch arranged on the connecting base (3) and a proximity switch alarm for alarm, the gasket (6) is provided with a trigger part for triggering the proximity switch to make the proximity switch alarm work, and the trigger part can trigger the proximity switch when the bolt (1) is loosened and the gasket (6) is displaced.

2. The bolt loosening early warning device according to claim 1, characterized in that, The micro switch alarm loop is provided with at least two, and the micro switches (8) on each micro switch alarm loop are arranged around the bolt (1) at intervals.

3. The bolt loosening early warning device according to claim 2, characterized in that The micro switch alarm of one of the micro switch alarm loops is an alarm lamp arranged on the connecting base (3), and the micro switch alarm of one of the micro switch alarm loops is an alarm module arranged on an instrument desk, which is used for sending an alarm signal when the bolt (1) is loosened.

4. The bolt loosening early warning device according to any one of claims 1 to 3, characterized in that The proximity switch alarm loop is provided with at least two, and the proximity switches on each proximity switch alarm loop are arranged around the bolt (1) at intervals.

5. The bolt loosening early warning device according to any one of claims 1 to 3, characterized in that The proximity switch is a Hall proximity switch (17), and the gasket (6) is a magnetic gasket, which constitutes the trigger part as a whole.

6. A vehicle comprising a vehicle body and a connector mounted to the vehicle body, the connector comprising a connection base (3) and a screw (1) fastened to the connection base (3), characterized in that The bolt (1) is sleeved with a gasket (6) and the gasket (6) is compressed on the surface of a connecting base (3) by the bolt (1), a micro switch alarm loop and a proximity switch alarm loop, the micro switch alarm loop comprises a micro switch (8) arranged on the connecting base (3) and a micro switch alarm for alarm, the micro switch (8) can trigger the micro switch alarm to work when the state of the micro switch (8) changes, the micro switch (8) comprises a top block (13) penetrating the surface of the connecting base (3) and a spring (14) driving the top block (13) to penetrate, when the bolt (1) is loosened, the spring (14) drives the top block (13) to penetrate and lift the gasket (6) and switch the state of the micro switch (8); the proximity switch alarm loop comprises a proximity switch arranged on the connecting base (3) and a proximity switch alarm for alarm, the gasket (6) is provided with a trigger part for triggering the proximity switch to make the proximity switch alarm work, and the trigger part can trigger the proximity switch when the bolt (1) is loosened and the gasket (6) is displaced.

7. The vehicle of claim 6, wherein, The micro switch alarm loop is provided with at least two, and the micro switches (8) on each micro switch alarm loop are arranged around the bolt (1) at intervals.

8. The vehicle of claim 7, wherein, The microswitch alarm of one of the microswitch alarm circuits is an alarm lamp arranged on the connecting base (3), and the microswitch alarm of the other microswitch alarm circuit is an alarm module arranged on the instrument desk, which is used to send an alarm signal when the bolt (1) is loosened.

9. The vehicle according to any one of claims 6-8, characterized in that The proximity switch alarm circuits are at least two, and the proximity switches of each proximity switch alarm circuit are arranged around the bolt (1) at intervals.

10. The vehicle according to any one of claims 6-8, characterized in that The proximity switch is a Hall proximity switch (17), and the gasket (6) is a magnetic gasket, which constitutes the trigger part as a whole.

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