Lifting device, loudspeaker assembly and vehicle

Abstract

The invention discloses a lifting device, a loudspeaker assembly and a vehicle. The lifting device comprises a shell, a lifting support and a driving assembly, the lifting support is installed on the shell in a liftable mode, the lifting support is provided with an installation position used for installing a loudspeaker, the driving assembly comprises a driving part, a first transmission part and a second transmission part, and the driving part can drive the second transmission part to move through the first transmission part. When the load of the second transmission part is larger than a preset threshold value, the second transmission part is in a protection state, and the second transmission part and the first transmission part can slide relative to each other, so that the overload protection function of the driving assembly is achieved, the lifting device is prevented from being damaged, and the service life of the loudspeaker is prolonged. And the reliability and the service life of the lifting device are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to a lifting device, a speaker assembly and a vehicle. Background Art

[0002] In related technologies, the speakers of some vehicles can be raised and lowered by a lifting device. During or after the raising process, the speakers may be subjected to external force by objects or people, causing the speakers and the lifting device to drop under the action of external force. The lifting mechanism is easily damaged in this process, and the reliability of the lifting device is poor. Summary of the Invention

[0003] The present invention aims to solve at least one of the above-mentioned technical problems in the prior art to a certain extent. To this end, the present invention provides a lifting device, wherein the driving assembly has an overload protection function to prevent the lifting device from being damaged.

[0004] The present invention also provides a loudspeaker assembly having the lifting device.

[0005] The present invention also provides a vehicle having the loudspeaker assembly.

[0006] According to an embodiment of the present invention, a lifting device includes: a shell; a lifting bracket, the lifting bracket is movably installed on the shell, and the lifting bracket has an installation position for installing a speaker; a driving assembly, the driving assembly is installed on the shell, the driving assembly includes a driving part, a first transmission part and a second transmission part, the driving part, the first transmission part, the second transmission part and the lifting bracket are sequentially connected in transmission, the driving part drives the second transmission part to move through the first transmission part, so that the second transmission part drives the lifting bracket to move relative to the shell; wherein, the second transmission part has a transmission state and a protection state, when the load of the second transmission part is less than or equal to a preset threshold value, the second transmission part is in the transmission state, and the second transmission part moves synchronously with the first transmission part; when the load of the second transmission part is greater than the preset threshold value, the second transmission part is in the protection state, and the second transmission part and the first transmission part can slide relative to each other.

[0007] According to the lifting device of an embodiment of the present invention, the driving part can drive the second transmission part to move through the first transmission part, so that the second transmission part drives the lifting bracket to rise and fall relative to the shell, thereby realizing the lifting function of the speaker. At the same time, when the load of the second transmission part is greater than a preset threshold, the second transmission part is in a protection state, and the second transmission part and the first transmission part can slide relative to each other to realize the overload protection function of the driving component, avoid damage to the lifting device, and thus help improve the reliability and service life of the lifting device.

[0008] According to some embodiments of the present invention, the first transmission part includes a first transmission shaft, and the second transmission part includes a second transmission shaft. The first transmission shaft and the second transmission shaft are rotatably installed in the housing. The first transmission shaft and the second transmission shaft are coaxially arranged. In the axial direction of the second transmission shaft, one end of the first transmission shaft away from the second transmission shaft is in transmission connection with the driving part. A first helical gear is provided on the end face of the first transmission shaft close to the second transmission shaft, and a second helical gear is provided on the end face of the second transmission shaft close to the first transmission shaft. In the transmission state, the first helical gear meshes with the second helical gear. In the protection state, the first helical gear and the second helical gear can slide relative to each other.

[0009] According to some embodiments of the present invention, the first transmission part further includes a first positioning pin. The first positioning pin is coaxially arranged with the first transmission shaft. The first positioning pin is connected to the end face of the first transmission shaft close to the second transmission shaft. The second transmission shaft has a first positioning hole at one end close to the first transmission shaft, and the first positioning pin passes through the first positioning hole; or, the second transmission part further includes a second positioning pin. The second positioning pin is coaxially arranged with the second transmission shaft. The second positioning pin is connected to the end face of the second transmission shaft close to the first transmission shaft. The first transmission shaft has a second positioning hole at one end close to the second transmission shaft, and the second positioning pin passes through the second positioning hole.

[0010] According to some embodiments of the present invention, the driving assembly further includes a support shaft. The support shaft is rotatably installed in the housing. The support shaft is coaxially arranged with the second transmission shaft. In the axial direction of the second transmission shaft, the support shaft is arranged on the side of the second transmission shaft away from the first transmission shaft. A third helical gear is provided on the end face of the support shaft close to the second transmission shaft, and a fourth helical gear is provided on the end face of the second transmission shaft close to the support shaft. In the transmission state, the third helical gear meshes with the fourth helical gear. In the protection state, the third helical gear and the fourth helical gear can slide relative to each other.

[0011] According to some embodiments of the present invention, the second transmission part further includes a transmission gear, and the transmission gear is fixedly arranged on the second transmission shaft; the lifting bracket includes a bracket body and a lifting rack fixedly connected. The bracket body has the installation position, and the lifting rack extends along the lifting direction of the lifting bracket. The lifting rack meshes with the transmission gear.

[0012] According to some embodiments of the present invention, the lifting bracket further includes a guide post. The guide post is fixedly connected to the bracket body. The housing is provided with a guide hole. Along the lifting direction of the lifting bracket, the guide post is in guiding cooperation with the guide hole.

[0013] According to some embodiments of the present invention, the housing includes a front housing and a rear housing, and the front housing and the rear housing jointly define an installation space, and at least a part of the driving assembly is disposed in the installation space.

[0014] A loudspeaker assembly according to another embodiment of the present invention includes a loudspeaker and the above-mentioned lifting device, and the loudspeaker is installed at the installation position.

[0015] According to an embodiment of the present invention, the driving part of the lifting device can drive the second transmission part to move through the first transmission part, so that the second transmission part drives the lifting bracket to lift relative to the housing, thereby realizing the lifting function of the loudspeaker. At the same time, when the load of the second transmission part is greater than a preset threshold, the second transmission part is in a protection state, and the second transmission part and the first transmission part can slide relative to each other to realize the overload protection function of the driving assembly, avoid damage to the lifting device, and thus help to improve the reliability and service life of the lifting device.

[0016] According to some embodiments of the present invention, the loudspeaker includes a loudspeaker body and a mask, the mask is installed at the installation position, an installation cavity is provided in the mask, and the loudspeaker body is disposed in the installation cavity.

[0017] A vehicle according to yet another embodiment of the present invention includes the above-mentioned loudspeaker assembly.

[0018] According to an embodiment of the present invention, the driving part of the lifting device can drive the second transmission part to move through the first transmission part, so that the second transmission part drives the lifting bracket to lift relative to the housing, thereby realizing the lifting function of the loudspeaker. At the same time, when the load of the second transmission part is greater than a preset threshold, the second transmission part is in a protection state, and the second transmission part and the first transmission part can slide relative to each other to realize the overload protection function of the driving assembly, avoid damage to the lifting device, and thus help to improve the reliability and service life of the lifting device.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is an exploded view of a lifting device and a loudspeaker according to an embodiment of the present invention;

[0021] Figure 2 is a schematic structural diagram of a lifting device and a loudspeaker according to an embodiment of the present invention;

[0022] Figure 3 is a schematic diagram of a driving assembly according to an embodiment of the present invention;

[0023] Figure 4Yes Figure 3 Enlarged view at the first transmission part;

[0024] Figure 5 Schematic diagram of the drive part according to an embodiment of the present invention;

[0025] Figure 6 Schematic diagram of the first transmission part according to an embodiment of the present invention;

[0026] Figure 7 Schematic diagram of the second transmission part according to an embodiment of the present invention;

[0027] Figure 8 Schematic diagram of the support shaft according to an embodiment of the present invention;

[0028] Figure 9 Schematic diagram of the lifting bracket according to an embodiment of the present invention;

[0029] Figure 10 Schematic diagram of the front housing according to an embodiment of the present invention;

[0030] Figure 11 Schematic diagram of the rear housing according to an embodiment of the present invention;

[0031] Figure 12 Schematic diagram of the structure of the face mask according to an embodiment of the present invention.

[0032] Reference numerals:

[0033] Housing 1; Front housing 11; Rear housing 12; First mounting hole 131; Third mounting hole 132; Guide hole 133;

[0034] Lifting bracket 2; Bracket body 21; Mounting position 221; Lifting rack 22; Guide post 23;

[0035] Drive assembly 3;

[0036] Drive part 31; Motor 311; Reduction gear set 312;

[0037] First transmission part 32; First transmission shaft 321; First helical tooth 3211; External spline 3212;

[0038] Second transmission part 33; Second transmission shaft 331; Second helical tooth 3311; Fourth helical tooth 3312; Second positioning pin 332; Fourth positioning pin 333; Transmission gear 334;

[0039] Support shaft 34; Third helical tooth 341; Fourth positioning hole 342;

[0040] Lifting device 10;

[0041] Speaker 20; face mask 201; top protective net 2011; side protective net 2022;

[0042] Speaker assembly 100. Detailed implementation mode

[0043] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0044] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

[0045] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0046] In the present invention, unless otherwise clearly specified and defined, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection or can communicate with each other; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] The lifting device 10, speaker assembly 100 and vehicle according to the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0048] Refer to Figure 1 and Figure 2As shown in the figure, the lifting device 10 according to an embodiment of the present invention includes: a housing 1, a lifting bracket 2, and a driving assembly 3. The lifting bracket 2 is liftably mounted on the housing 1. The lifting bracket 2 has a mounting position 221 for mounting a speaker 20. That is to say, the speaker 20 can be mounted at the mounting position 221. By controlling the lifting of the lifting bracket 2, the lifting of the speaker 20 can be realized, thereby changing the playing effect of the speaker 20.

[0049] The driving assembly 3 is mounted on the housing 1. The driving assembly 3 includes a driving part 31, a first transmission part 32, and a second transmission part 33. The driving part 31, the first transmission part 32, the second transmission part 33, and the lifting bracket 2 are sequentially connected in transmission. The driving part 31 drives the second transmission part 33 to move through the first transmission part 32, so that the second transmission part 33 drives the lifting bracket 2 to lift relative to the housing 1.

[0050] Wherein, the second transmission part 33 has a transmission state and a protection state. When the load of the second transmission part 33 is less than or equal to a preset threshold, the second transmission part 33 is in the transmission state, and the second transmission part 33 moves synchronously with the first transmission part 32 to realize the lifting function of the lifting bracket 2. When the load of the second transmission part 33 is greater than the preset threshold, the second transmission part 33 is in the protection state, and the second transmission part 33 can slide relative to the first transmission part 32 to realize the overload protection function of the driving assembly 3.

[0051] Specifically, referring to Figure 1 and Figure 2 As shown in the figure, when the lifting device 10 is in normal use, when the load of the second transmission part 33 is less than or equal to the preset threshold, the second transmission part 33 is in the transmission state. At this time, the driving part 31 drives the second transmission part 33 to move synchronously through the first transmission part 32, and the second transmission part 33 drives the lifting bracket 2 to lift relative to the housing 1 to realize the lifting function of the lifting bracket 2.

[0052] After the lifting bracket 2 is lifted or during the lifting process, if the lifting bracket 2 is subjected to a downward external force (for example, the lifting bracket 2 is pressed by an object or pressed by a person) resulting in the load transmitted from the lifting bracket 2 to the second transmission part 33 being greater than the preset threshold, the second transmission part 33 is in the protection state. At this time, the second transmission part 33 can slide relative to the first transmission part 32. That is to say, the movement of the second transmission part 33 and the first transmission part 32 is not synchronous, the second transmission part 33 and the first transmission part 32 can move relatively independently, and the transmission between the second transmission part 33 and the first transmission part 32 slips, so that the lifting bracket 2 can descend under the action of the external force, and the overload protection function of the driving assembly 3 is realized by the slipping between the second transmission part 33 and the first transmission part 32 to avoid damage to the driving assembly 3 and the lifting bracket 2.

[0053] According to the lifting device 10 of the embodiments of the present invention, the driving part 31 can drive the second transmission part 33 to move through the first transmission part 32, so that the second transmission part 33 drives the lifting bracket 2 to lift relative to the housing 1, thereby realizing the lifting function of the speaker 20. At the same time, when the load of the second transmission part 33 is greater than a preset threshold, the second transmission part 33 is in a protected state, and the second transmission part 33 and the first transmission part 32 can slide relative to each other to realize the overload protection function of the driving assembly 3, avoid damage to the lifting device 10, and further help to improve the reliability and service life of the lifting device 10.

[0054] In some embodiments of the present invention, referring to Figures 1 - 7 As shown, the first transmission part 32 includes a first transmission shaft 321, and the second transmission part 33 includes a second transmission shaft 331. The first transmission shaft 321 and the second transmission shaft 331 are rotatably installed on the housing 1. The housing 1 can support the first transmission shaft 321 and the second transmission shaft 331 in the axial and radial directions. The first transmission shaft 321 and the second transmission shaft 331 are coaxially arranged. In the axial direction of the second transmission shaft 331, one end of the first transmission shaft 321 away from the second transmission shaft 331 is in transmission connection with the driving part 31. A first helical tooth 3211 is provided on the end face of the first transmission shaft 321 close to the second transmission shaft 331, and a second helical tooth 3311 is provided on the end face of the second transmission shaft 331 close to the first transmission shaft 321. In the transmission state, the first helical tooth 3211 meshes with the second helical tooth 3311 to realize the synchronous rotation of the first transmission shaft 321 and the second transmission shaft 331. In the protected state, the first helical tooth 3211 and the second helical tooth 3311 can slide relative to each other to realize the overload protection function of the driving assembly 3.

[0055] Specifically, referring to Figure 1 、 Figure 6 、 Figure 7 and Figure 10 As shown, a communicating first mounting hole 131 and a second mounting hole can be formed in the housing 1. The first transmission shaft 321 is rotatably inserted through the first mounting hole 131, and the second transmission shaft 331 is rotatably inserted through the second mounting hole. The first mounting hole 131 and the second mounting hole can be coated with grease to reduce the frictional resistance of the first transmission shaft 321 and the second transmission shaft 331 during rotation.

[0056] Referring to Figure 5 and Figure 6As shown, the driving part 31 includes a motor 311 and a reduction gear set 312 that are drivingly connected. The input gear of the reduction gear set 312 is drivingly connected to the output shaft of the motor 311. The output gear of the reduction gear set 312 has internal splines. One end of the first transmission shaft 321 away from the second transmission shaft 331 has external splines 3212. The external splines 3212 are meshed and driven with the internal splines. The reduction gear set 312 can reduce the speed and increase the torque of the power output by the motor 311 and then transmit it to the first transmission shaft 321.

[0057] Referring to Figures 1 - 4 , Figure 6 and Figure 7 As shown, the first transmission shaft 321 and the second transmission shaft 331 are coaxially arranged to reduce the size of the driving assembly 3 in the radial direction of the second transmission shaft 331 and improve the space utilization rate of the driving assembly 3. The opposite end faces of the first transmission shaft 321 and the second transmission shaft 331 are respectively provided with a first helical gear 3211 and a second helical gear 3311, which is convenient for realizing the synchronous transmission and overload protection of the first transmission shaft 321 and the second transmission shaft 331. At the same time, when the first helical gear 3211 and the second helical gear 3311 slip, the first helical gear 3211 and the second helical gear 3311 are not easily broken and damaged. In the transmission state, the first helical gear 3211 meshes with the second helical gear 3311 to realize the synchronous rotation of the first transmission shaft 321 and the second transmission shaft 331. In the protection state, when the torque transmitted between the first helical gear 3211 and the second helical gear 3311 exceeds the design upper limit, the first helical gear 3211 and the second helical gear 3311 can slide relative to each other to realize the overload protection function of the driving assembly 3. Among them, the opposite end faces of the first transmission shaft 321 and the second transmission shaft 331 can be respectively provided with a plurality of first helical gears 3211 and a plurality of second helical gears 3311 to improve the transmission stability and reliability of the first transmission shaft 321 and the second transmission shaft 331.

[0058] In some other embodiments of the present invention (not shown in the figure), the driving part 31 has a driving wheel. The second transmission part 33 includes a driven wheel and a second transmission shaft 331 that are fixedly connected. The first transmission part 32 is configured as a transmission belt, and the transmission belt is drivingly connected between the driving wheel and the driven wheel. When the load of the second transmission part 33 is less than or equal to a preset threshold, the second transmission part 33 is in a transmission state, and the driving wheel drives the driven wheel and the second transmission shaft 331 to rotate through the transmission belt, and both the driven wheel and the second transmission shaft 331 move synchronously with the transmission belt. When the load of the second transmission part 33 is greater than the preset threshold, the second transmission part 33 is in a protection state, and the driven wheel and the transmission belt can slide relative to each other to realize the overload protection function of the driving assembly 3 through the slipping of the driven wheel relative to the transmission belt.

[0059] In some embodiments of the present invention (not shown in the figures), the first transmission part 32 further includes a first positioning pin, which is coaxially arranged with the first transmission shaft 321. The first positioning pin is connected to the end face of the first transmission shaft 321 close to the second transmission shaft 331. The second transmission shaft 331 has a first positioning hole at one end close to the first transmission shaft 321. The first positioning pin passes through the first positioning hole. The coaxiality of the first transmission shaft 321 and the second transmission shaft 331 can be ensured through the positioning cooperation between the first positioning pin and the first positioning hole, and the assembly of the first transmission shaft 321 and the second transmission shaft 331 is facilitated.

[0060] In some other embodiments of the present invention, referring to Figure 6 and Figure 7 as shown, the second transmission part 33 further includes a second positioning pin 332, which is coaxially arranged with the second transmission shaft 331. The second positioning pin 332 is connected to the end face of the second transmission shaft 331 close to the first transmission shaft 321. The first transmission shaft 321 has a second positioning hole at one end close to the second transmission shaft 331. The second positioning pin 332 passes through the second positioning hole. The coaxiality of the first transmission shaft 321 and the second transmission shaft 331 can be ensured through the positioning cooperation between the second positioning pin 332 and the second positioning hole, and the assembly of the first transmission shaft 321 and the second transmission shaft 331 is facilitated.

[0061] In some embodiments of the present invention, referring to Figures 1 - 3 、 Figure 7 and Figure 8 as shown, the drive assembly 3 further includes a support shaft 34, which is rotatably installed in the housing 1. The housing 1 can support the support shaft 34 in the axial and radial directions. The support shaft 34 is coaxially arranged with the second transmission shaft 331. In the axial direction of the second transmission shaft 331, the support shaft 34 is arranged on the side of the second transmission shaft 331 away from the first transmission shaft 321. A third helical gear 341 is provided on the end face of the support shaft 34 close to the second transmission shaft 331, and a fourth helical gear 3312 is provided on the end face of the second transmission shaft 331 close to the support shaft 34. In the transmission state, the third helical gear 341 meshes with the fourth helical gear 3312, and the support shaft 34 can rotate synchronously with the second transmission shaft 331. In the protection state, the third helical gear 341 and the fourth helical gear 3312 can slide relative to each other to reduce the instantaneous load of the second transmission shaft 331 and improve the service life of the second transmission shaft 331.

[0062] Specifically, referring to Figures 1 - 3 、 Figure 7 、 Figure 8 and Figure 10As shown, a third mounting hole 132 communicating with the second mounting hole may be formed in the housing 1. The support shaft 34 is rotatably disposed through the third mounting hole 132. Grease may be coated in the third mounting hole 132 to reduce the frictional resistance of the support shaft 34 during rotation. The support shaft 34 and the first transmission shaft 321 can support the second transmission shaft 331 on both axial sides of the second transmission shaft 331 to improve the stability of the movement of the second transmission shaft 331. In the protection state, when an external force is transmitted to the second transmission shaft 331 through the lifting bracket 2, both ends of the second transmission shaft 331 can rotate relative to the support shaft 34 and the first transmission shaft 321, and the influence of the frictional resistance of the housing 1 on the support shaft 34 on the rotation of the second transmission shaft 331 is reduced to reduce the instantaneous load of the second transmission shaft 331.

[0063] It should be noted that in the protection state, when the second transmission shaft 331 slides relative to the first transmission shaft 321 and the support shaft 34, the frictional force between the first helical tooth 3211 and the second helical tooth 3311, and the frictional force between the third helical tooth 341 and the fourth helical tooth 3312 can form a damping effect on the second transmission shaft 331, so as to reduce the descending speed of the lifting bracket 2 under the action of an external force through the second transmission shaft 331 and prevent the lifting device 10 from being damaged due to the rapid descent of the lifting bracket 2.

[0064] In some embodiments of the present invention (not shown in the figure), the drive assembly 3 further includes a third positioning pin. The third positioning pin is coaxially arranged with the support shaft 34. The third positioning pin is connected to the end face of the support shaft 34 close to the second transmission shaft 331. The second transmission shaft 331 has a third positioning hole at one end close to the support shaft 34. The third positioning pin is disposed through the third positioning hole. The coaxiality of the second transmission shaft 331 and the support shaft 34 can be ensured through the positioning cooperation between the third positioning pin and the third positioning hole, and the assembly of the second transmission shaft 331 and the support shaft 34 is facilitated.

[0065] In other embodiments of the present invention, refer to Figure 7 and Figure 8 As shown, the second transmission part 33 further includes a fourth positioning pin 333. The fourth positioning pin 333 is coaxially arranged with the second transmission shaft 331. The fourth positioning pin 333 is connected to the end face of the second transmission shaft 331 close to the support shaft 34. The support shaft 34 has a fourth positioning hole 342 at one end close to the second transmission shaft 331. The fourth positioning pin 333 is disposed through the fourth positioning hole 342. The coaxiality of the second transmission shaft 331 and the support shaft 34 can be ensured through the positioning cooperation between the fourth positioning pin 333 and the fourth positioning hole 342, and the assembly of the second transmission shaft 331 and the support shaft 34 is facilitated.

[0066] In some embodiments of the present invention, refer to Figure 2 、 Figure 7 and Figure 9As shown, the second transmission part 33 further includes a transmission gear 334. The transmission gear 334 is fixedly arranged on the second transmission shaft 331. The lifting bracket 2 includes a bracket body 21 and a lifting rack 22 that are fixedly connected. The bracket body 21 has a mounting position 221. The lifting rack 22 extends along the lifting direction of the lifting bracket 2. The lifting rack 22 meshes with the transmission gear 334. The second transmission shaft 331 can drive the lifting rack 22 to move up and down relative to the housing 1 through the transmission gear 334. The transmission structure of the transmission gear 334 and the lifting rack 22 is simple and reliable, which is convenient for manufacturing and assembly.

[0067] In some embodiments of the present invention, referring to Figure 2 , Figure 7 and Figure 9 As shown, the number of the transmission gears 334 is multiple. The multiple transmission gears 334 are arranged at intervals along the axial direction of the second transmission shaft 331. The number of the lifting racks 22 is multiple. The multiple lifting racks 22 are in one-to-one correspondence with the multiple transmission gears 334 and mesh with each other to improve the reliability of the transmission between the second transmission part 33 and the lifting bracket 2.

[0068] In some other embodiments of the present invention (not shown in the figure), the second rotating shaft can be a crankshaft. The second transmission part 33 further includes a connecting rod. The connecting rod is connected between the crankshaft and the lifting device 10. When the crankshaft rotates, the lifting bracket 2 can be driven to move up and down through the connecting rod.

[0069] In some embodiments of the present invention, referring to Figure 1 and Figures 9 - 11 As shown, the lifting bracket 2 further includes a guide post 23. The guide post 23 is fixedly connected with the bracket body 21. The housing 1 is provided with a guide hole 133. Along the lifting direction of the lifting bracket 2, the guide post 23 is in guiding cooperation with the guide hole 133 to improve the stability of the lifting bracket 2 during lifting and prevent the lifting bracket 2 from tilting relative to the housing 1.

[0070] In some embodiments of the present invention, referring to Figure 1 , Figures 9 - 11 As shown, the number of the guide posts 23 is multiple. The multiple guide posts 23 are symmetrically arranged on the bracket body 21. The guide posts 23 can also be connected below the lifting rack 22. The number of the guide holes 133 is multiple. The multiple guide holes 133 are in one-to-one correspondence with the multiple guide posts 23 and are in guiding cooperation with each other to further improve the stability of the lifting bracket 2 during lifting.

[0071] In some embodiments of the present invention, referring to Figure 1 , Figure 10 and Figure 11As shown, the housing 1 includes a front housing 11 and a rear housing 12. The front housing 11 and the rear housing 12 jointly define an installation space, and at least part of the drive assembly 3 is disposed in the installation space to facilitate the assembly of the drive assembly 3. Specifically, when assembling the lifting device 10, the drive assembly 3 can be first installed on the front housing 11 or the rear housing 12, and then the front housing 11 and the rear housing 12 are assembled into one body through fasteners, which facilitates the assembly and maintenance of the lifting device 10.

[0072] Referring to Figures 1 - 11 As shown, the loudspeaker assembly 100 according to another embodiment of the present invention includes: a lifting device 10 and a loudspeaker 20. The lifting device 10 is the lifting device 10 of the above embodiment, and the loudspeaker 20 is installed at the installation position 221.

[0073] In the loudspeaker assembly 100 according to an embodiment of the present invention, the driving part 31 of the lifting device 10 can drive the second transmission part 33 to move through the first transmission part 32, so that the second transmission part 33 drives the lifting bracket 2 to move up and down relative to the housing 1, thereby realizing the lifting function of the loudspeaker 20. At the same time, when the load of the second transmission part 33 is greater than a preset threshold, the second transmission part 33 is in a protection state, and the second transmission part 33 and the first transmission part 32 can slide relative to each other to realize the overload protection function of the drive assembly 3, avoid damage to the lifting device 10, and thus help to improve the reliability and service life of the lifting device 10.

[0074] In some embodiments of the present invention, referring to Figure 1 and Figure 12 As shown, the loudspeaker 20 includes a loudspeaker body and a face mask 201. The face mask 201 is installed at the installation position 221. An installation cavity is provided in the face mask 201, and the loudspeaker body is disposed in the installation cavity. The sound emitted by the loudspeaker body can be transmitted to the outside through the face mask 201. The face mask 201 can be used to protect the loudspeaker body. The face mask 201 is an appearance part visible to users, and the style and shape of the face mask 201 can be adjusted according to user needs.

[0075] A vehicle according to still another embodiment of the present invention includes the loudspeaker assembly 100 of the above embodiment.

[0076] In the vehicle according to an embodiment of the present invention, the driving part 31 of the lifting device 10 can drive the second transmission part 33 to move through the first transmission part 32, so that the second transmission part 33 drives the lifting bracket 2 to move up and down relative to the housing 1, thereby realizing the lifting function of the loudspeaker 20. At the same time, when the load of the second transmission part 33 is greater than a preset threshold, the second transmission part 33 is in a protection state, and the second transmission part 33 and the first transmission part 32 can slide relative to each other to realize the overload protection function of the drive assembly 3, avoid damage to the lifting device 10, and thus help to improve the reliability and service life of the lifting device 10.

[0077] In some embodiments of the present invention, the speaker assembly 100 can be installed on the instrument panel of a vehicle. The speaker assembly 100 has a retracted state and a use state. In the retracted state, the upper surface of the speaker 20 can be flush with the instrument panel. When the vehicle is locked, the vehicle controller can control the driving part 31 to act so that the speaker assembly 100 is in the retracted state. When the vehicle plays music, the vehicle controller can control the driving part 31 to act so that the speaker assembly 100 is switched from the retracted state to the use state. At this time, the driving assembly 3 drives the speaker 20 to rise relative to the instrument panel through the lifting bracket 2, so that the speaker 20 protrudes from the instrument panel. When an external force acting downward on the speaker 20 or the lifting bracket 2 causes the load transmitted by the lifting bracket 2 to the second transmission part 33 to be greater than a preset threshold value, the second transmission part 33 is in a protection state, and the lifting bracket 2 and the speaker 20 can descend relative to the instrument panel to the retracted state where the upper surface of the speaker 20 is flush with the instrument panel.

[0078] In some embodiments of the present invention, referring to Figure 1 and Figure 12 as shown, the installation position 221 is located on the side of the lifting bracket 2 away from the housing 1. The mask 201 has a top protection net 2011 and a side protection net 2022. In the retracted state, the top protection net 2011 is flush with the outer surface of the instrument panel, and the side protection net 2022 is located inside the instrument panel. In the use state, the side protection net 2022 is located outside the instrument panel and faces the vehicle occupants, and the sound-emitting direction of the speaker body can face the side protection net 2022, so that the speaker 20 can improve the in-vehicle sound field and enhance the user's listening experience in the raised state.

[0079] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0080] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A lifting device, characterized in that, Comprising: A housing (1); A lifting bracket (2), which is liftably mounted on the housing (1), and the lifting bracket (2) has a mounting position (221) for mounting a speaker (20); A driving assembly (3), which is mounted on the housing (1), and the driving assembly (3) includes a driving part (31), a first transmission part (32) and a second transmission part (33). The driving part (31), the first transmission part (32), the second transmission part (33) and the lifting bracket (2) are sequentially connected in transmission. The driving part (31) drives the second transmission part (33) to move through the first transmission part (32), so that the second transmission part (33) drives the lifting bracket (2) to lift relative to the housing (1); Wherein, the second transmission part (33) has a transmission state and a protection state. When the load of the second transmission part (33) is less than or equal to a preset threshold value, the second transmission part (33) is in the transmission state, and the second transmission part (33) moves synchronously with the first transmission part (32); When the load of the second transmission part (33) is greater than the preset threshold value, the second transmission part (33) is in the protection state, and the second transmission part (33) can slide relative to the first transmission part (32).

2. The lifting device according to claim 1, characterized in that The first transmission part (32) includes a first transmission shaft (321), and the second transmission part (33) includes a second transmission shaft (331). The first transmission shaft (321) and the second transmission shaft (331) are rotatably mounted on the housing (1), and the first transmission shaft (321) and the second transmission shaft (331) are coaxially arranged. In the axial direction of the second transmission shaft (331), one end of the first transmission shaft (321) away from the second transmission shaft (331) is in transmission connection with the driving part (31). A first helical tooth (3211) is provided on the end face of the first transmission shaft (321) close to the second transmission shaft (331), and a second helical tooth (3311) is provided on the end face of the second transmission shaft (331) close to the first transmission shaft (321). In the transmission state, the first helical tooth (3211) meshes with the second helical tooth (3311). In the protection state, the first helical tooth (3211) and the second helical tooth (3311) can slide relative to each other.

3. The lifting device according to claim 2, characterized in that, The first transmission part (32) further includes a first positioning pin, the first positioning pin is coaxially arranged with the first transmission shaft (321), the first positioning pin is connected to the end face of the first transmission shaft (321) close to the second transmission shaft (331), and the second transmission shaft (331) has a first positioning hole at one end close to the first transmission shaft (321), and the first positioning pin passes through the first positioning hole; Alternatively, the second transmission part (33) further includes a second positioning pin (332). The second positioning pin (332) is coaxially arranged with the second transmission shaft (331). The second positioning pin (332) is connected to the end face of the second transmission shaft (331) close to the first transmission shaft (321). The first transmission shaft (321) has a second positioning hole at one end close to the second transmission shaft (331). The second positioning pin (332) passes through the second positioning hole.

4. The lifting device according to claim 2, characterized in that, The driving assembly (3) further includes a support shaft (34). The support shaft (34) is rotatably installed on the housing (1). The support shaft (34) is coaxially arranged with the second transmission shaft (331). In the axial direction of the second transmission shaft (331), the support shaft (34) is arranged on the side of the second transmission shaft (331) away from the first transmission shaft (321). A third helical gear (341) is provided on the end face of the support shaft (34) close to the second transmission shaft (331). A fourth helical gear (3312) is provided on the end face of the second transmission shaft (331) close to the support shaft (34). In the transmission state, the third helical gear (341) meshes with the fourth helical gear (3312). In the protection state, the third helical gear (341) and the fourth helical gear (3312) can slide relative to each other.

5. The lifting device according to any one of claims 2-4, characterized in that, The second transmission part (33) further includes a transmission gear (334). The transmission gear (334) is fixedly arranged on the second transmission shaft (331). The lifting bracket (2) includes a bracket body (21) and a lifting rack (22) fixedly connected. The bracket body (21) has the installation position (221). The lifting rack (22) extends along the lifting direction of the lifting bracket (2). The lifting rack (22) meshes with the transmission gear (334).

6. The lifting device according to claim 5, characterized in that, The lifting bracket (2) further includes a guide post (23). The guide post (23) is fixedly connected to the bracket body (21). The housing (1) is provided with a guide hole (133). Along the lifting direction of the lifting bracket (2), the guide post (23) is in guiding cooperation with the guide hole (133).

7. The lifting device according to claim 1, characterized in that, The housing (1) includes a front housing (11) and a rear housing (12). The front housing (11) and the rear housing (12) jointly define an installation space. At least part of the driving assembly (3) is arranged in the installation space.

8. A loudspeaker assembly, characterized in that, Comprising: A lifting device (10), the lifting device (10) being the lifting device (10) according to any one of claims 1-7; A speaker (20), the speaker (20) being installed at the installation position (221).

9. The loudspeaker assembly (100) according to claim 8, characterized in that, The speaker (20) includes a speaker body and a mask (201). The mask (201) is installed at the installation position (221). An installation cavity is provided in the mask (201). The speaker body is arranged in the installation cavity.

10. A vehicle, characterized in that, Comprising the speaker assembly (100) according to claim 9.

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