Spare tire fixing device, spare tire fixing system and vehicle

Abstract

The utility model relates to a spare tire fixing device, a spare tire fixing system and a vehicle, and the spare tire fixing device comprises a clamping assembly used for clamping a spare tire; the driving assembly is used for driving the clamping assembly to clamp or release the spare tire; according to the spare tire fixing device provided by some embodiments of the invention, the clamping assembly is driven and adjusted through the driving assembly, so that the adaptability of the spare tire fixing device to the fixation of the spare tire is ensured.

Description

Technical Field

[0001] The present application relates to the field of automobile technology, and in particular to a spare tire fixing device, a spare tire fixing system and a vehicle. Background Art

[0002] The spare tire of a vehicle is a tire used for replacement when the vehicle has a malfunction such as a tire blowout. Generally speaking, a vehicle will carry at least one spare tire.

[0003] In the related art, the spare tire can be internal or external. Regardless of whether it is internal or external, the spare tire requires a corresponding fixing device to prevent the spare tire from moving.

[0004] However, the force that can be provided by the current spare tire fixing device for positioning is often fixed, which will result in that the spare tire cannot be effectively positioned by the fixing device when the volume of the spare tire changes. Utility Model Content

[0005] The embodiment of the present application provides a spare tire fixing device, which improves the adaptability of the spare tire fixing device, so as to at least partially solve the above-mentioned technical problems.

[0006] In order to achieve the above-mentioned object, according to a first aspect of the present application, a spare tire fixing device is provided, comprising: a clamping assembly for clamping the spare tire; a driving assembly for driving the clamping assembly to clamp or release the spare tire;

[0007] The clamping assembly comprises two clamping jaws, which are arranged opposite to each other and are used to clamp the spare tire from opposite directions.

[0008] Optionally, in some embodiments of the present application, the clamping jaw is constructed to have an arc-shaped structure.

[0009] Optionally, in some embodiments of the present application, the driving assembly includes: two connecting members, used to respectively connect the two clamping jaws; a prime mover, used to drive the connecting members to move; and a transmission mechanism, used to form a transmission with the connecting members and the prime mover.

[0010] Optionally, in some embodiments of the present application, the drive assembly is disposed between the two clamping jaws.

[0011] Optionally, in some embodiments of the present application, the prime mover is a motor with a self-locking function.

[0012] Optionally, in some embodiments of the present application, the connecting member is formed with or connected to a rack; the transmission mechanism includes a gear driven by the prime mover; and the rack is meshed with the gear.

[0013] Optionally, in some embodiments of the present application, the racks of the two connecting members are respectively arranged on opposite sides of the gear.

[0014] Optionally, in some embodiments of the present application, the spare tire fixing device as described above further includes: a sensor for detecting the pressure between the clamp and the spare tire; wherein the sensor is connected to a controller so that the controller controls the prime mover according to the signal of the sensor.

[0015] Optionally, in some embodiments of the present application, the spare tire fixing device as described above further includes: an alarm component, configured to send out an alarm signal when the tire pressure change of the spare tire exceeds a preset threshold.

[0016] Optionally, in some embodiments of the present application, the alarm component includes: an alarm having an alarm contact to sound an alarm when the alarm contact is triggered; wherein the alarm is installed to the clamp so that the alarm contact is triggered by the clamp when the spare tire is deflated.

[0017] Optionally, in some embodiments of the present application, the alarm assembly further includes: a push rod, which is slidably connected to the clamp; wherein the alarm is mounted to the first end of the push rod; and a contact portion is formed at the second end of the push rod.

[0018] Optionally, in some embodiments of the present application, the contact portion is movably disposed between the clamp and the spare tire.

[0019] Optionally, in some embodiments of the present application, an elastic member is used to drive the contact portion of the push rod to contact the spare tire.

[0020] Optionally, in some embodiments of the present application, the clamping jaw is formed with a through hole for the push rod to pass through.

[0021] Optionally, in some embodiments of the present application, the extension direction of the through hole is parallel to the movement direction of the clamping jaw.

[0022] Optionally, in some embodiments of the present application, step surfaces are provided at both ends of the through hole; and the elastic member is disposed between the two step surfaces.

[0023] Optionally, in some embodiments of the present application, the elastic member is constructed as a coil spring sleeved on the outside of the push rod.

[0024] Optionally, in some embodiments of the present application, an abutment portion surrounding the push rod is formed in the middle portion of the push rod; and both ends of the coil spring abut against the abutment portion and the step surface away from the abutment portion, respectively.

[0025] Optionally, in some embodiments of the present application, the alarm further includes: an alarm light for issuing a light alarm; wherein the alarm contact is arranged on a first side of the alarm; the alarm light is arranged on a second side of the alarm opposite to the first side; the alarm contact is electrically connected to the alarm light so that the alarm contact controls the lighting and extinguishing of the alarm light.

[0026] Optionally, in some embodiments of the present application, the spare tire fixing device as described above further includes: a base for installation on a vehicle; a fixing assembly for fixing the wheel hub of the spare tire; wherein the base and / or the fixing assembly are arranged between the two clamps.

[0027] Optionally, in some embodiments of the present application, the connecting member and the base are in sliding connection; the gear and the base are in rotational connection; and the rotation axis of the gear is perpendicular to the sliding direction of the connecting member.

[0028] Optionally, in some embodiments of the present application, the base is provided with a receiving space for receiving the gear and the prime mover.

[0029] Optionally, in some embodiments of the present application, the base is provided with a pull-out hole for the connecting member to pass through; the pull-out hole is connected to the accommodating space.

[0030] Optionally, in some embodiments of the present application, the fixing assembly includes: a positioning column, used to pass through the axial hole of the wheel hub of the spare tire; and a baffle, fixedly connected to the positioning column to stop the outer side of the wheel hub of the spare tire.

[0031] Optionally, in some embodiments of the present application, the fixing assembly further includes: a plurality of limiting columns, used to pass through the mounting holes of the wheel hub of the spare tire; and a plurality of limiting nuts, used to be fitted onto the limiting columns to limit the position of the wheel hub of the spare tire.

[0032] According to a second aspect of the present application, a spare tire fixing system is provided, comprising: a controller and a spare tire fixing device as described above; wherein the controller is electrically connected to the sensor and the prime mover, respectively, so that when the pressure detected by the sensor is greater than a preset pressure threshold, the prime mover is controlled to stop driving the clamp close to the spare tire.

[0033] According to a third aspect of the present application, a vehicle is also provided, comprising the spare tire fixing device or spare tire fixing system as described above.

[0034] In the spare tire fixing device provided in some embodiments of the present application, the adaptability of the spare tire fixing device to the spare tire fixing is ensured by driving and adjusting the clamping assembly by the driving assembly.

[0035] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0037] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same figure numbers represent the same parts in the following description.

[0038] Figure 1 is a schematic diagram of the overall structure of a spare tire fixing device provided in an exemplary embodiment of the present application;

[0039] Figure 2 yes Figure 1 An exploded structural diagram of a partial structure of the spare tire fixing device shown;

[0040] Figure 3 yes Figure 1 A structural schematic diagram of a partial structure of the spare tire fixing device shown;

[0041] Figure 4 yes Figure 1 A partial schematic diagram of a partial structure of a spare tire fixing device shown;

[0042] Figure 5 yes Figure 1 The structural schematic diagram of the spare tire fixing system shown;

[0043] Figure 6 It is a schematic structural diagram of a vehicle provided in an exemplary embodiment of the present application.

[0044] Description of reference numerals:

[0045] 1. Vehicle; 10. Spare tire fixing device; 100. Clamping assembly; 110. Clamping claw; 111. Through hole; 111a. Step surface; 200. Driving assembly; 210. Connecting piece; 211. Rack; 220. Prime mover; 230. Transmission mechanism; 231. Gear; 300. Sensor; 400. Alarm assembly; 410. Alarm; 411. Alarm contact; 412. Alarm light; 420. Push rod; 421. Contact portion; 422. Abutment portion; 430. Elastic member; 700. Base; 710. Accommodating space; 720. Pull-out hole; 730. Assembly hole; 800. Fixing assembly; 810. Positioning column; 820. Baffle; 821. Mounting bolt; 830. Limit column; 840. Limit nut; 900. Controller. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0047] Reference Figures 1 to 4 As shown, as a first aspect of the present application, the present application provides a spare tire fixing device 10, which includes: a clamping assembly 100 and a driving assembly 200. The clamping assembly 100 is used to clamp the spare tire (not shown in the figure); the driving assembly 200 is used to drive the clamping assembly 100 to clamp or release the spare tire.

[0048] The driving assembly 200 drives and adjusts the clamping assembly 100, thereby ensuring the reliability of the spare tire fixing device 10. When the spare tire is replaced or expands or contracts due to the ambient temperature, the driving assembly 200 can drive the clamping assembly 100 to adapt to the change of the spare tire, ensuring that the spare tire can be firmly clamped at the spare tire fixing device, ensuring the adaptability of the spare tire fixing device 10 to the spare tire fixing.

[0049] Reference Figure 1 , Figure 2 and Figure 3 As shown, in some embodiments of the present application, specifically, the clamping assembly 100 includes: two clamping jaws 110; the two clamping jaws 110 are arranged opposite to each other, and the two clamping jaws 110 are used to contact the spare tire from opposite directions; the driving assembly 200 is arranged between the two clamping jaws 110. In addition, the clamping jaws 110 are constructed with an arc structure, which can better adapt to the shape of the tire.

[0050] Reference Figure 1 , Figure 2 and Figure 3 As shown, the two clamping jaws 110 can be arranged relatively to each other, and as an extended solution, they can also be arranged relatively to each other up and down. As an alternative, only one clamping jaw 110 can be actively moved, and the other clamping jaw 110 has a fixed position, but such a disadvantage is that the spare tire cannot be effectively centered.

[0051] Reference Figure 1 , Figure 2 and Figure 3 As shown, in some embodiments of the present application, the driving assembly 200 includes: two connecting members 210, a prime mover 220, and a transmission mechanism 230. The two connecting members 210 are used to connect the two clamping jaws 110 respectively; the prime mover 220 is used to drive the connecting members 210 to move; and the transmission mechanism 230 is used to form a transmission between the connecting members 210 and the prime mover 220.

[0052] Specifically, the connecting member 210 is formed with or connected to a rack 211; the transmission mechanism 230 includes a gear 231 driven by the prime mover 220; the rack 211 is meshed with the gear 231; the connecting member 210 can drive the clamp 110 to clamp or release the spare tire through the transmission between the gear 231 and the connecting member 210 when the prime mover 220 is running.

[0053] Reference Figure 3 As shown, in some embodiments of the present application, the racks 211 of the two connecting members 210 are respectively arranged on opposite sides of the gear 231; for example Figure 3 The upper and lower sides shown in , of course, the left and right sides can also be set.

[0054] Reference Figure 1 As shown, in some embodiments of the present application, the spare tire fixing device 10 of the present application further includes: a sensor 300. The sensor 300 is used to detect the pressure between the clamping claw 110 and the spare tire; wherein the sensor 300 is connected to a controller 900 so that the controller 900 controls the prime mover 220 according to the signal of the sensor 300.

[0055] It is understandable that when the spare tire is clamped, when the sensor 300 detects that the pressure exceeds the preset pressure threshold, the controller 900 can stop the prime mover 220, thereby clamping the spare tire and ensuring sufficient clamping force.

[0056] Reference Figure 1 , Figure 2 and Figure 3 As shown, in some embodiments of the present application, the spare tire fixing device 10 of the present application further includes: an alarm component 400. The alarm component 400 is used to send an alarm signal when the tire pressure change of the spare tire exceeds a preset threshold.

[0057] Specifically, the alarm assembly 400 includes an alarm 410. The alarm 410 has an alarm contact 411 to sound an alarm when the alarm contact 411 is triggered; the alarm 410 is mounted to the clamping jaw 110 so that the alarm contact 411 is triggered by the clamping jaw 110 when the spare tire is deflated.

[0058] As an optional solution, the air leakage of the spare tire can also be monitored through the pressure change detected by the sensor 300, so that the user can be warned through the control system of the vehicle 1, such as through the instrument panel or the central control display screen. However, this usually requires the control system of the vehicle 1 to be powered on.

[0059] Therefore, it is necessary for the external spare tire fixing device 10 to adopt an independent alarm 410 that is not dependent on the control system of the vehicle 1 .

[0060] Reference Figure 1 , Figure 2 and Figure 3 As shown, in some embodiments of the present application, the alarm 410 further includes an alarm light 412. The alarm light 412 is used to issue a light alarm; the alarm contact 411 is disposed on a first side of the alarm 410; and the alarm light 412 is disposed on a second side of the alarm 410 opposite to the first side.

[0061] This makes it easier for the user to observe the light alarm of the alarm 410. As an optional solution, the alarm 410 may also include a sound device for alarming, such as a buzzer.

[0062] It can be understood that, since the same gear 231 is used to drive the two connecting members 210 simultaneously, a synchronous centering effect can be ensured when clamping the spare tire.

[0063] Reference Figure 1 , Figure 2 and Figure 3 As shown, the clamping jaw 110 is constructed to have an arc-shaped structure; the sensor 300 and / or the alarm 410 are installed at the top of the arc of the clamping jaw 110 .

[0064] It is understandable that this can provide more accurate feedback on the overall pressure of the spare tire. In particular, when the spare tire is clamped by two synchronously moving clamps 110, the two sensors 300 or two alarms 410 arranged opposite to each other and located at the far end can detect the two farthest positions of the spare tire.

[0065] As a more specific solution, the two sensors 300 or the two alarms 410 are located on the same straight line, which may be a straight line where the diameter of the spare tire is located.

[0066] Reference Figure 1 , Figure 2 and Figure 3 As shown, in some embodiments of the present application, the alarm assembly 400 of the present application further includes: a top rod 420 and an elastic member 430 .

[0067] The push rod 420 and the clamping jaw 110 are slidably connected; the alarm 410 is mounted on the first end of the push rod 420; and the second end of the push rod 420 is formed with a contact portion 421. The elastic member 430 is used to drive the contact portion 421 of the push rod 420 to contact the spare tire. The clamping jaw 110 is formed with a through hole 111 for the push rod 420 to pass through; the extension direction of the through hole 111 is parallel to the movement direction of the clamping jaw 110; wherein, step surfaces 111a are provided at both ends of the through hole 111; and the elastic member 430 is arranged between the two step surfaces 111a.

[0068] As a more specific solution, the elastic member 430 is constructed as a coil spring that is sleeved on the outside of the push rod 420; wherein, an abutment portion 422 surrounding the push rod 420 is formed in the middle portion of the push rod 420; the two ends of the coil spring respectively abut against the abutment portion 422 and a step surface 111a away from the abutment portion 422.

[0069] It is understandable that after the clamping is completed, the clamping jaw 110 will stay at the preset position. At this time, if the spare tire leaks, the spare tire air pressure will be lower than the air pressure during clamping. When the air pressure changes to a certain extent, although the clamping jaw 110 can still clamp the spare tire, due to the elasticity of the elastic member 430, the push rod 420 will locally squeeze the spare tire, that is, when the spare tire leaks, the contact portion 421 of the push rod 420 moves inward along with the outer contour of the spare tire under the action of the elastic member 430. When it moves inward to a certain extent, the alarm contact 411 of the alarm 410 is contacted by the outer side of the clamping jaw 110, thereby triggering the alarm 410. That is, when the tire pressure change of the spare tire exceeds the preset threshold, the push rod 420 moves inward to trigger the alarm 410.

[0070] Reference Figure 2 As shown, in some embodiments of the present application, the spare tire fixing device 10 further includes: a base 700 and a fixing assembly 800. The base 700 is used to be installed on the vehicle 1; the fixing assembly 800 is used to fix the wheel hub of the spare tire; the base 700 and / or the fixing assembly 800 are arranged between the two clamping jaws 110.

[0071] As a specific solution, the base 700 is provided with a plurality of assembly holes 730 , and the base 700 can be assembled by passing assembly bolts (not shown in the figure) through the assembly holes 730 to mount the entire spare tire fixing device 10 to the vehicle 1 .

[0072] As a specific solution, the connecting member 210 and the base 700 form a sliding connection; the gear 231 and the base 700 form a rotational connection; the rotation axis of the gear 231 is perpendicular to the sliding direction of the connecting member 210.

[0073] Reference Figure 2 As shown, as a specific solution, the base 700 is provided with a receiving space 710 for receiving the gear 231 and the prime mover 220. The base 700 is provided with a drawing hole 720 for the connecting member 210 to pass through; the drawing hole 720 is communicated with the receiving space 710.

[0074] It can be understood that the main structure of the fixture can be integrated through the base 700, so that the user can install and replace the fixture easily.

[0075] Reference Figure 2 As shown, in some embodiments of the present application, the fixing assembly 800 includes: a positioning column 810, a baffle 820, a plurality of limiting columns 830, and a plurality of limiting nuts 840. The positioning column 810 is used to pass through the axial hole of the wheel hub of the spare tire; the baffle 820 is fixedly connected to the positioning column 810 to stop at the outside of the wheel hub of the spare tire; the plurality of limiting columns 830 are used to pass through the mounting holes of the wheel hub of the spare tire; and the plurality of limiting nuts 840 are used to be fitted to the limiting columns 830 to limit the position of the wheel hub of the spare tire.

[0076] As a more specific solution, a plurality of mounting bolts 821 may be used to fix the baffle 820 to the positioning column 810 .

[0077] It is understandable that the user can effectively perform basic fixation of the spare tire through the fixing assembly 800 .

[0078] Reference Figure 5 and Figure 6 As shown, as a second aspect of the present application, the present application also provides a fixing system suitable for a spare tire of a vehicle 1; the fixing system includes a prime mover 220, a controller 900 and the spare tire fixing device 10 as described above.

[0079] The controller 900 is electrically connected to the sensor 300 and the prime mover 220 respectively, so that when the pressure detected by the sensor 300 is greater than a preset pressure threshold, the prime mover 220 is controlled to stop driving the clamp 110 to approach the spare tire.

[0080] The prime mover 220 may be a motor with a self-locking function, such as a stepper motor, and may be a dedicated motor in a fixed system or a motor in other systems in the vehicle 1 .

[0081] According to a third aspect of the present application, a vehicle 1 is provided, which includes the spare tire fixing device 10 and the spare tire fixing system as described above, and the functions or effects of the spare tire fixing device 10 and the spare tire fixing system as described above are possessed by the vehicle 1, which will not be described in detail in the present application.

[0082] The vehicle 1 may be a fuel vehicle, a plug-in hybrid vehicle, a new energy vehicle, etc., and this application does not make any specific limitation on this.

[0083] The spare tire fixing device 10 of the present application can drive the gear 231 to rotate through the prime mover 220, and then drive the connecting member 210 to slide synchronously through the gear 231, thereby driving the clamping claw 110 to clamp the spare tire; when the pressure received by the sensor 300 meets the preset pressure preset value, the prime mover 220 stops driving, thereby ensuring the clamping force on the spare tire. When the spare tire leaks, the push rod 420 moves inward under the action of the elastic member 430, so that the alarm contact 411 is triggered by the clamping claw 110, and the alarm 410 alarms, thereby effectively reminding the user that the spare tire is leaking.

[0084] In the description of this application, the terms "first" and "second" 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0085] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0086] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.

[0087] The above are only preferred embodiments of the present application and do not constitute any form of limitation to the present application. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A spare tire fixing device (10), characterized in that: include: A clamping assembly (100) for clamping a spare tire; A driving assembly (200) for driving the clamping assembly (100) to clamp or release the spare tire; Wherein, the clamping assembly (100) comprises: Two clamping jaws (110), the two clamping jaws (110) are arranged opposite to each other and are used to clamp the spare tire from opposite directions.

2. The spare tire fixing device (10) according to claim 1, characterized in that: The clamping jaw (110) is constructed to have an arc-shaped structure.

3. The spare tire fixing device (10) according to claim 1, characterized in that: The driving assembly (200) comprises: Two connecting members (210), used to respectively connect the two clamping jaws (110); A prime mover (220), used for driving the connecting member (210) to move; The transmission mechanism (230) is used to form a transmission with the connecting member (210) and the prime mover (220).

4. The spare tire fixing device (10) according to claim 3, characterized in that: in, The driving assembly (200) is arranged between the two clamping jaws (110).

5. The spare tire fixing device (10) according to claim 3, characterized in that: in, The prime mover (220) is a motor with a self-locking function.

6. The spare tire fixing device (10) according to claim 3, characterized in that: The connecting member (210) is formed with or connected to a rack (211); the transmission mechanism (230) includes a gear (231) driven by the prime mover (220); and the rack (211) is meshed with the gear (231).

7. The spare tire fixing device (10) according to claim 6, characterized in that: The racks (211) of the two connecting members (210) are respectively arranged on two opposite sides of the gear (231).

8. The spare tire fixing device (10) according to any one of claims 6 to 7, characterized in that: Also includes: A sensor (300) for detecting the pressure between the clamping jaw (110) and the spare tire; The sensor (300) is connected to a controller (900) so that the controller (900) controls the prime mover (220) according to a signal from the sensor (300).

9. The spare tire fixing device (10) according to claim 8, characterized in that: Also includes: The alarm component (400) is used to send out an alarm signal when the tire pressure change of the spare tire exceeds a preset threshold.

10. The spare tire fixing device (10) according to claim 9, characterized in that: The alarm component (400) comprises: An alarm (410) having an alarm contact (411) for sounding an alarm when the alarm contact (411) is triggered; Wherein, the alarm (410) is mounted on the clamping jaw (110) so that the alarm contact (411) is triggered by the clamping jaw (110) when the spare tire is deflated.

11. The spare tire fixing device (10) according to claim 10, characterized in that: The alarm component (400) further comprises: A push rod (420) is slidably connected to the clamping jaw (110); Wherein, the alarm (410) is mounted to the first end of the top rod (420); and a contact portion (421) is formed at the second end of the top rod (420).

12. The spare tire fixing device (10) according to claim 11, characterized in that: in, The contact portion (421) is movably arranged between the clamping claw (110) and the spare tire.

13. The spare tire fixing device (10) according to claim 12, characterized in that: Also includes: The elastic member (430) is used to drive the contact portion (421) of the push rod (420) to contact the spare tire.

14. The spare tire fixing device (10) according to claim 13, characterized in that: in, The clamping jaw (110) is formed with a through hole (111) for the push rod (420) to pass through.

15. The spare tire fixing device (10) according to claim 14, characterized in that: in, The extending direction of the through hole (111) is parallel to the moving direction of the clamping jaw (110).

16. The spare tire fixing device (10) according to claim 15, characterized in that: in, Both ends of the through hole (111) are provided with step surfaces (111a); and the elastic member (430) is arranged between the two step surfaces (111a).

17. The spare tire fixing device (10) according to claim 16, characterized in that: The elastic member (430) is constructed as a coil spring sleeved on the outside of the push rod (420).

18. The spare tire fixing device (10) according to claim 17, characterized in that: in, An abutment portion (422) surrounding the push rod (420) is formed in the middle of the push rod (420); two ends of the coil spring respectively abut against the abutment portion (422) and the step surface (111a) away from the abutment portion (422).

19. The spare tire fixing device (10) according to claim 10, characterized in that: in, The alarm device (410) further comprises: An alarm light (412) is used to issue a light alarm; Wherein, the alarm contact (411) is arranged on a first side of the alarm (410); and the alarm light (412) is arranged on a second side of the alarm (410) opposite to the first side; The alarm contact (411) is electrically connected to the alarm light (412) so that the alarm contact (411) controls the lighting and extinguishing of the alarm light (412).

20. The spare tire fixing device (10) according to claim 8, characterized in that: Also includes: A base (700) for mounting on a vehicle (1); A fixing assembly (800) for fixing the wheel hub of the spare tire; Wherein, the base (700) and / or the fixing assembly (800) are arranged between the two clamping jaws (110).

21. The spare tire fixing device (10) according to claim 20, characterized in that: in, The connecting member (210) and the base (700) form a sliding connection; the gear (231) and the base (700) form a rotational connection; and the rotation axis of the gear (231) is perpendicular to the sliding direction of the connecting member (210).

22. The spare tire fixing device (10) according to claim 21, characterized in that: in, The base (700) is provided with a receiving space (710) for receiving the gear (231) and the prime mover (220).

23. The spare tire fixing device (10) according to claim 22, characterized in that: in, The base (700) is provided with a pull-out hole (720) for the connecting member (210) to pass through; the pull-out hole (720) is in communication with the accommodating space (710).

24. The spare tire fixing device (10) according to claim 20, It is characterized in that in, The fixing assembly (800) comprises: A positioning column (810) is used to pass through the axial hole of the wheel hub of the spare tire; A baffle (820) is fixedly connected to the positioning column (810) to stop the outer side of the wheel hub of the spare tire.

25. The spare tire fixing device (10) according to claim 24, It is characterized in that in, The fixing assembly (800) further comprises: A plurality of limiting posts (830) for passing through the mounting holes of the wheel hub of the spare tire; A plurality of limiting nuts (840) are used to be fitted onto the limiting posts (830) to limit the position of the wheel hub of the spare tire.

26. A spare tire fixing system, characterized in that: include: A controller (900) and a spare tire fixing device (10) according to any one of claims 8 to 25; The controller (900) is electrically connected to the sensor (300) and the prime mover (220) respectively, so that when the pressure detected by the sensor (300) is greater than a preset pressure threshold, the prime mover (220) is controlled to stop driving the clamp (110) to approach the spare tire.

27. A vehicle (1), characterized in that include: The spare tire fixing device (10) according to any one of claims 1 to 25 or the spare tire fixing system according to claim 26.

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