Vehicle-mounted fixing base

Abstract

The invention discloses a vehicle-mounted fixing base, and relates to the technical field of vehicle-mounted multimedia articles, the vehicle-mounted fixing base comprises a base, a driving part, a first transmission part, at least three second transmission parts and four clamping jaws, the base is provided with a mounting cavity and four movable openings, and the four movable openings are communicated with the mounting cavity; the driving piece is arranged in the mounting cavity; the first transmission part is rotationally connected into the mounting cavity and is in transmission connection with the driving part; the three second transmission parts are rotationally connected into the mounting cavity and are in transmission connection with the first transmission part; wherein one clamping jaw is in transmission connection with the first transmission part, and the other three clamping jaws are in transmission connection with the three second transmission parts respectively. Each clamping jaw extends out of the corresponding movable opening and is movably connected to the corresponding movable opening; the driving part drives the first transmission part and the three second transmission parts to rotate forwards or backwards so that the four clamping jaws can get close to or get away from one another. According to the technical scheme provided by the invention, the stability of the vehicle-mounted sound equipment fixed in the automobile is improved, so that the normal use of the vehicle-mounted sound equipment is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of vehicle-mounted multimedia objects, and in particular to a vehicle-mounted fixed base. Background Art

[0002] Nowadays, there are many types of car multimedia items. Audio and electronic screens are all must-have items for cars in the current market. Car audio is a way to improve the sound effect inside the car. Car audio can work alone in the car and with the whole car sound system, or the speaker can be taken out and used as an outdoor speaker.

[0003] Traditional methods of fixing car audio mainly include using fixing bolts, clamps or special brackets to fix the speaker in a specific position in the car. However, these methods have certain shortcomings. For example, the fixing bolts and clamps are easy to loosen due to the movement of the vehicle, causing the speaker to vibrate and make noise during use; the special bracket may take up a large space, affecting the space utilization and aesthetics of the car. Therefore, the large and heavy car audio is not firmly fixed in the car, affecting the normal use of the car audio. Summary of the invention

[0004] The main purpose of the present invention is to provide a vehicle-mounted fixing base, aiming to improve the stability of the vehicle-mounted audio system fixed in the car, thereby ensuring the normal use of the vehicle-mounted audio system.

[0005] In order to achieve the above-mentioned object, the present invention proposes a vehicle-mounted fixed base, and the vehicle-mounted fixed base comprises:

[0006] A base, wherein the base is provided with a mounting cavity and four movable openings, and the four movable openings are connected to the mounting cavity;

[0007] A driving member, wherein the driving member is disposed in the mounting cavity;

[0008] A first transmission member, the first transmission member is rotatably connected in the installation cavity and is transmission-connected to the driving member;

[0009] at least three second transmission members, the three second transmission members are rotatably connected in the installation cavity and are transmission-connected to the first transmission member; and

[0010] Four clamping jaws, one of which is in transmission connection with the first transmission member, and the other three clamping jaws are respectively in transmission connection with three second transmission members; and each of the clamping jaws extends from one of the movable openings and is movably connected to the movable opening;

[0011] The driving member drives the first transmission member and the three second transmission members to rotate forward or reversely, so that the four clamping jaws are moved closer to each other or farther away from each other.

[0012] In one embodiment, the first transmission member is a triple gear;

[0013] The driving member comprises a driving motor and a worm, wherein the driving motor is arranged on the base and connected to the worm, and the worm is meshedly connected to the triple gear.

[0014] In one embodiment, the vehicle-mounted fixed base further includes a transmission belt, and a side surface of the transmission belt is provided with transmission teeth;

[0015] The second transmission member is a double gear, the belt is sleeved on three second transmission frames, and the transmission teeth are meshed and connected with the three second transmission members;

[0016] The driving motor drives the worm to drive the first transmission member to rotate, so that the first transmission member drives the three second transmission members to rotate through the transmission belt.

[0017] In one embodiment, the vehicle-mounted fixed base further includes at least four bearings, the four bearings are rotatably connected to the base respectively, the first transmission member is connected to one of the bearings, and the remaining three bearings are connected to three second transmission members respectively.

[0018] In one embodiment, the first transmission member and the three second transmission members are arranged in a rectangular manner in the installation cavity.

[0019] In one embodiment, each jaw comprises:

[0020] Mounting plate;

[0021] a rack, the rack being detachably connected to a side surface of the mounting plate and being in transmission connection with the first transmission member or the second transmission member; and

[0022] A clamping plate is connected to the mounting plate and is vertically arranged; and the clamping plate extends from the movable opening and abuts against the outer wall of the base.

[0023] In one embodiment, a first elastic layer is provided on one side of the splint.

[0024] In one embodiment, at least four limiting protrusions are further provided on one side of the base where the movable opening is provided, and the four limiting protrusions are located at the four corners of the base.

[0025] In one embodiment, each of the limiting protrusions is provided with a second elastic layer.

[0026] In one embodiment, a contact protrusion is further provided on one side of the base where the movable opening is provided. The contact protrusion is located at the center of the base and is spaced apart from the four limiting protrusions.

[0027] The vehicle-mounted fixed base of the technical solution of the present invention includes a base, a driving member, a first transmission member, at least three second transmission members and four clamps. The base is provided with an installation cavity and four movable openings, and the four movable openings are connected with the installation cavity; the driving member is arranged in the installation cavity; the first transmission member is rotatably connected in the installation cavity and is transmission-connected with the driving member; the three second transmission members are rotatably connected in the installation cavity and are transmission-connected with the first transmission member; one of the clamps is transmission-connected with the first transmission member, and the other three clamps are transmission-connected with the three second transmission members respectively; and each clamp extends from a movable opening and is movably connected at the movable opening; the driving member drives the first transmission member and the three second transmission members to rotate forward or reverse, so that the four clamps are close to or away from each other; in this way, the first transmission member and the three second transmission members are connected by a rotational connection, one of the clamps is directly transmission-connected with the first transmission member, and the other three clamps are transmission-connected with the three second transmission members respectively. This layout enables the four clamps to keep synchronization during the movement, and this transmission method is not only compact in structure, but also can achieve efficient power transmission. The forward and reverse control of the driving part enables the four clamping claws to accurately approach or move away from each other, thereby firmly fixing and quickly releasing the car audio, improving the stability of the car audio in the car, and thus ensuring the normal use of the car audio. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0029] Figure 1 A schematic structural diagram of an embodiment of a vehicle-mounted fixed base provided by the present invention;

[0030] Figure 2 A schematic diagram of the structure of the vehicle-mounted fixed base provided by the present invention without clamping the vehicle-mounted audio system;

[0031] Figure 3 A schematic longitudinal cross-sectional view of the vehicle-mounted fixing base provided by the present invention;

[0032] Figure 4 A schematic diagram of the structure of a disassembled portion of the housing of the vehicle-mounted fixed base provided by the present invention;

[0033] Figure 5 A schematic structural diagram of the clamping claws of the vehicle-mounted fixing base provided by the present invention.

[0034] Description of Figure Numbers:

[0035] 10. base; 10a. mounting cavity; 10b. movable opening; 11. limiting protrusion; 12. contact protrusion;

[0036] 20. driving member; 21. driving motor; 22. worm; 30. first transmission member; 40. second transmission member; 50. clamping claw; 51. mounting plate; 52. rack; 53. clamping plate; 60. transmission belt;

[0037] 60a, transmission teeth; 70, bearing; 1, car audio.

[0038] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0041] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0042] The invention provides a vehicle-mounted fixed base.

[0043] See also Figures 1 to 4In one embodiment of the present invention, the vehicle-mounted fixed base includes a base 10, a driving member 20, a first transmission member 30, at least three second transmission members 40 and four clamping jaws 50. The base 10 is provided with a mounting cavity 10a and four movable openings 10b, and the four movable openings 10b are communicated with the mounting cavity 10a; the driving member 20 is arranged in the mounting cavity 10a; the first transmission member 30 is rotatably connected in the mounting cavity 10a and is transmission-connected with the driving member 20; the three second transmission members 40 are rotatably connected in the mounting cavity 10a and are transmission-connected with the first transmission member 30; one of the clamping jaws 50 is transmission-connected with the first transmission member 30, and the remaining three clamping jaws 50 are transmission-connected with the three second transmission members 40 respectively; and each clamping jaw 50 extends from a movable opening 10b and is movably connected at the movable opening 10b; the driving member 20 drives the first transmission member 30 and the three second transmission members 40 to rotate forward or reverse, so that the four clamping jaws 50 are close to or away from each other.

[0044] When the driving member 20 is started, the driving member 20 drives the first transmission member 30 to rotate through the transmission connection. The first transmission member 30 is rotationally connected to the installation cavity 10a, and drives the second transmission member 40 to rotate. The three second transmission members 40 are rotationally connected to the installation cavity 10a, and form a transmission connection with the first transmission member 30, so that the four clamping jaws 50 are close to each other or away from each other. Each clamping jaw 50 extends from a corresponding movable opening 10b and is movably connected to the movable opening 10b. Through the forward or reverse rotation of the driving member 20, the four clamping jaws 50 are close to each other or away from each other, thereby realizing the fixing and releasing functions of the vehicle audio.

[0045] By providing the mounting cavity 10a and the four movable openings 10b on the base 10, the clamping jaw 50 is flexibly connected to the base 10. This design enables the base to have higher adaptability and flexibility when fixing vehicle-mounted devices of different shapes and sizes. Compared with the prior art, this improvement significantly improves the installation efficiency of the vehicle-mounted devices and reduces the installation difficulty. In addition, the design of the clamping jaw 50 of the present invention is ingenious. The stability of the vehicle-mounted devices during the fixing process is ensured.

[0046] The driving member 20 is placed in the installation cavity 10a and is connected to the first transmission member 30 and the three second transmission members 40 by means of a rotational connection. One of the clamping jaws 50 is directly connected to the first transmission member 30, while the other three clamping jaws 50 are respectively connected to the three second transmission members 40. This layout enables the four clamping jaws 50 to maintain synchronization during movement. This transmission method is not only compact in structure, but also can achieve efficient power transmission. The forward and reverse rotation control of the driving member 20 enables the four clamping jaws 50 to accurately approach or move away from each other, thereby achieving a firm fixation and quick release of the vehicle audio 1, improving the stability of the vehicle audio 1 fixed in the car, and thus ensuring the normal use of the vehicle audio 1.

[0047] The base 10 is the main supporting structure of the vehicle-mounted fixed base, and is provided with an installation cavity 10a and four movable openings 10b. The installation cavity 10a is connected to the four movable openings 10b for installing and fixing other components. The driving member 20 is arranged in the installation cavity 10a, and is used to drive the rotation of other transmission members. The first transmission member 30 is rotatably connected in the installation cavity 10a, and is transmission-connected to the driving member 20. In this embodiment, at least three second transmission members 40 are provided, all of which are rotatably connected in the installation cavity 10a, and are transmission-connected to the first transmission member 30. At least one of the clamps 50 is transmission-connected to the first transmission member 30, and the remaining three clamps 50 are transmission-connected to the three second transmission members 40 respectively.

[0048] In other embodiments, the vehicle-mounted fixed base can adapt to different speaker shapes. The vehicle-mounted fixed base includes but is not limited to clamping speakers of different shapes, and can also clamp other types of vehicle-mounted electronic products. The specific structural design of the vehicle-mounted fixed base in this case can also be adaptively improved and set according to the clamped electronic products. The aspects of the vehicle-mounted fixed base that can be adaptively improved include the shape of the base 10, the position and number of the drive member 20, the first transmission member 30, the second transmission member 40 and the clamping jaw 50, and the shape or structure of the clamping jaw 50.

[0049] In one embodiment, see Figure 3 and Figure 4 The first transmission member 30 is a triple gear; the driving member 20 includes a driving motor 21 and a worm 22, the driving motor 21 is disposed on the base 10 and connected to the worm 22, and the worm 22 is meshedly connected with the triple gear.

[0050] The first transmission member 30 adopts a triple gear, so that the first transmission member 30 can be meshed and connected with the worm 22, the second transmission member 40 and the clamping claw 50 at the same time. This structure reduces the intermediate transmission links, reduces energy loss, thereby improving the overall transmission efficiency, and also reduces the installation space, which is conducive to the miniaturization of the vehicle-mounted fixed base. At the same time, the design of the meshing connection of the triple gears ensures the stability during the transmission process, reduces the beating and impact caused by the gear gap, thereby reducing mechanical wear and extending the service life of the equipment.

[0051] In one embodiment, see Figure 3 and Figure 4 The vehicle-mounted fixed base also includes a transmission belt 60, and a transmission tooth 60a is provided on one side surface of the transmission belt 60; the second transmission member 40 is a double gear, and the belt sleeve is arranged on three second transmission frames, and the transmission tooth 60a is meshed and connected with the three second transmission members 40; the driving motor 21 drives the worm 22 to drive the first transmission member 30 to rotate, so that the first transmission member 30 drives the three second transmission members 40 to rotate through the transmission belt 60.

[0052] A transmission tooth 60a is provided on one side of the transmission belt 60. This design increases the meshing degree with the second transmission member 40, i.e., the double gear, making the power transmission more stable and reliable. Compared with the traditional friction transmission, the introduction of the transmission tooth 60a greatly reduces the slippage phenomenon, improves the transmission efficiency, and reduces the ineffective loss of energy.

[0053] The transmission belt 60 is sleeved on the three second transmission members 40, and the transmission teeth 60a are meshed and connected with the three second transmission members 40. This structural design improves the balance of the system. When the drive motor 21 drives the worm 22 to drive the first transmission member 30 to rotate, the three second transmission members 40 can be synchronously driven by the transmission belt 60, effectively avoiding the problem of a single transmission member being subjected to excessive load, dispersing the driving pressure, and increasing the service life of the system.

[0054] The worm 22 is driven by the driving motor 21 to drive the first transmission member 30 to rotate, and then the three second transmission members 40 are driven to rotate by the transmission belt 60, forming an efficient power transmission mechanism. This design makes the entire drive system run more smoothly, reduces mechanical vibration caused by uneven transmission, reduces noise, and improves driving comfort.

[0055] In one embodiment, see Figure 3 and Figure 4 The vehicle-mounted fixed base also includes at least four bearings 70 , which are rotatably connected to the base 10 , the first transmission member 30 is connected to one of the bearings 70 , and the remaining three bearings 70 are connected to the three second transmission members 40 , respectively.

[0056] The uniform distribution of the four bearings 70 makes the vehicle-mounted fixed base more stable in the vehicle environment. During the driving process of the vehicle, the four bearings 70 can effectively withstand forces from different directions, thereby ensuring the stability of the vehicle-mounted fixed base and preventing the vehicle-mounted fixed base from being displaced or damaged due to vibration or bumps.

[0057] The first transmission member 30 is connected to one of the bearings 70 , and the other three bearings 70 are connected to the three second transmission members 40 , so that the first transmission member 30 and the three second transmission members 40 are smoother during transmission and movement noise is reduced.

[0058] In one embodiment, see Figure 3 and Figure 4 The first transmission member 30 and the three second transmission members 40 are arranged in a rectangular manner in the installation cavity 10a.

[0059] Specifically, the first transmission member 30 and the three second transmission members 40 are distributed at 90 degrees and are externally connected by a transmission belt 60. The first transmission member 30 rotates to drive the transmission belt 60, and the transmission belt 60 drives the remaining second transmission members 40 to rotate simultaneously.

[0060] The rectangular arrangement makes the transmission path between the first transmission member 30 and the three second transmission members 40 more reasonable, reduces energy loss, and thus significantly improves the transmission efficiency. Compared with the traditional transmission layout, higher output efficiency can be achieved under the same power input, which is of great significance for improving the operating performance of the entire system. The rectangular arrangement effectively utilizes the space in the installation cavity 10a, making the spacing between the transmission members more uniform, which not only improves the space utilization, but also reduces friction and collision during the transmission process.

[0061] In one embodiment, see Figure 3 , Figure 4 and Figure 5 Each clamping jaw 50 includes a mounting plate 51, a rack 52 and a clamping plate 53; the rack 52 is detachably connected to a side surface of the mounting plate 51 and is transmission-connected to the first transmission member 30 or the second transmission member 40; the clamping plate 53 is connected to the mounting plate 51 and is vertically arranged; and the clamping plate 53 extends from the movable opening 10b and abuts against the outer wall of the base 10.

[0062] The transmission connection between the rack 52 and the first transmission member 30 or the second transmission member 40 provides a flexible transmission mode. This design can quickly adjust the working state of the clamping jaw 50 according to actual production needs, thereby meeting the processing requirements of different products. The vertical arrangement of the clamping plate 53 and the mounting plate 51, and the design that the clamping plate 53 extends from the movable opening 10b and abuts against the outer wall of the base 10 effectively improve the stability and accuracy of clamping. This structure can ensure that the clamped object will not be displaced in the case of high-speed movement or severe vibration. The detachable connection design of the rack 52 makes the maintenance and replacement of the clamping jaw 50 more convenient, greatly reducing maintenance costs and downtime.

[0063] The mounting plate 51 is used to fix the clamping jaw 50 and connect it to other mechanical structures. The mounting plate 51 is made of high-strength aluminum alloy material and has good stability and wear resistance. The rack 52 is located on one side surface of the mounting plate 51. The rack 52 is detachably connected to facilitate replacement and maintenance. The rack 52 is made of high-quality steel and has high strength and wear resistance. The first transmission member 30 or the second transmission member 40 is connected to the rack 52 for driving the movement of the clamping jaw 50. The first transmission member 30 and the second transmission member 40 can be selected according to actual needs to meet different working conditions. The clamping plate 53 is connected to the mounting plate 51 and is vertically arranged. The clamping plate 53 is made of high-strength stainless steel material and has high hardness and wear resistance. The base 10 is used to support the clamping jaw 50 and ensure that the clamping jaw 50 abuts against the outer wall of the base 10. The base 10 is made of cast iron material and has high stability and wear resistance.

[0064] The rack 52 is disassembled and connected to one side surface of the mounting plate 51, and the rack 52 is ensured to be in transmission connection with the first transmission member 30 or the second transmission member 40. The clamping plate 53 is extended from the movable opening 10b to abut against the outer wall of the base 10. The first transmission member 30 or the second transmission member 40 drives the movement of the clamping jaw 50 to achieve the function of clamping or releasing the object.

[0065] It is worth noting that the initial installation positions of the mounting plate 51 and the rack 52 of the same clamping jaw 50 on the base 10 can be designed differently according to the actual product size, and are not limited to the installation positions shown in the drawings. At the same time, the opening and closing time and clamping force of the four clamping jaws 50 can be controlled by controlling the running time of the driving member 20, so that the clamping force and opening and closing time of the four clamping jaws 50 can be adjusted according to the specific product, thereby improving the use range and convenience of the vehicle-mounted fixed base;

[0066] The vehicle-mounted fixed base of the present invention can be adapted to different models of speakers by replacing the clamps of different shapes and the racks of different shapes.

[0067] In one embodiment, see Figure 3 , Figure 4 and Figure 5 , a first elastic layer is provided on one side of the clamping plate 53 .

[0068] The clamping plate 53 is made of high-strength material and has good support and stability. The first elastic layer is made of polyurethane material and has good elasticity and wear resistance. The width of the first elastic layer is the same as that of the clamping plate 53, and the length is slightly shorter than that of the clamping plate 53, so as to be fixed on one side of the clamping plate 53.

[0069] Due to the presence of the first elastic layer, the clamping plate 53 can absorb and disperse the external force through the buffering effect of the elastic layer when it is impacted, thereby greatly reducing the possibility of damage to the clamping plate 53 and increasing the service life of the clamping plate 53. The elastic layer can adjust its hardness and elasticity as needed to adapt to different working environments and maintain good stability and reliability.

[0070] At the same time, the shape and thickness of the first elastic layer on the clamping plate 53 of the clamping jaw 50 can also be adjusted according to actual usage conditions to fit and clamp speakers of different models.

[0071] In one embodiment, see Figure 3 , Figure 4 and Figure 5 At least four limiting protrusions 11 are also provided on one side of the base 10 where the movable opening 10 b is provided. The four limiting protrusions 11 are located at the four corners of the base 10 .

[0072] The limiting protrusion 11 is designed as a rectangular body, and its diameter and height are determined according to the size of the base 10 and the use requirements. The base 10 is provided with the limiting protrusion 11 to ensure that when the car audio 1 is placed, the limiting protrusion 11 has a pre-positioning effect on the bottom of the car audio 1. Accordingly, the bottom of the car audio 1 has a concave structure, and the concave structure and the limiting protrusion 11 are mutually engaged, thereby improving the stability of the car audio 1 fixed on the base 10.

[0073] The design of the limiting protrusion 11 effectively increases the stability of the base 10, and prevents the movable opening 10b from being displaced by external forces during operation, thereby ensuring the safety of the entire device during use. This improved stability makes the operation more reliable.

[0074] In one embodiment, see Figure 3 , Figure 4 and Figure 5 Each limiting protrusion 11 is provided with a second elastic layer.

[0075] The provision of the second elastic layer effectively improves the elastic performance of the limiting protrusion 11. In the prior art, a single limiting protrusion 11 is often prone to fatigue damage during repeated use, so that when it is subjected to external force, it can better absorb and buffer the impact force and reduce the damage caused by excessive impact force. This structural design significantly improves the durability of the limiting protrusion 11 and greatly extends the service life of the product. The limiting protrusion 11 is prone to generate noise when it contacts the car audio 1, and the provision of the second elastic layer also helps to reduce the noise of the product.

[0076] In one embodiment, see Figure 3 , Figure 4 and Figure 5A contact protrusion 12 is also provided on one side of the base 10 where the movable opening 10 b is provided. The contact protrusion 12 is located at the center of the base 10 and is spaced apart from the four limiting protrusions 11 .

[0077] The contact protrusion 12 is located at the center of the base 10 and is spaced apart from the four limiting protrusions 11. This design enables the base 10 to disperse and withstand external forces through the interaction between the contact protrusion 12 and the limiting protrusion 11 when subjected to external forces, thereby significantly enhancing the impact resistance and deformation resistance of the base 10.

[0078] When the base 10 is subjected to pressure, the contact protrusion 12 and the limiting protrusion 11 can work together to enable the base 10 to maintain good stability under the action of force, avoiding deformation or damage of the base 10 due to uneven force, and greatly improving the service life of the base 10.

[0079] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A vehicle-mounted fixed base, characterized in that: The vehicle-mounted fixed base comprises: A base, wherein the base is provided with a mounting cavity and four movable openings, and the four movable openings are connected to the mounting cavity; A driving member, wherein the driving member is disposed in the mounting cavity; A first transmission member, the first transmission member is rotatably connected in the installation cavity and is transmission-connected to the driving member; at least three second transmission members, the three second transmission members are rotatably connected in the installation cavity and are transmission-connected to the first transmission member; and Four clamping jaws, one of which is in transmission connection with the first transmission member, and the other three clamping jaws are respectively in transmission connection with three second transmission members; and each of the clamping jaws extends from one of the movable openings and is movably connected to the movable opening; The driving member drives the first transmission member and the three second transmission members to rotate forward or reversely, so that the four clamping jaws are moved closer to each other or farther away from each other.

2. The vehicle-mounted fixing base according to claim 1, characterized in that: The first transmission member is a triple gear; The driving member comprises a driving motor and a worm, wherein the driving motor is arranged on the base and connected to the worm, and the worm is meshedly connected to the triple gear.

3. The vehicle-mounted fixing base according to claim 2, characterized in that: The vehicle-mounted fixed base also includes a transmission belt, and a side surface of the transmission belt is provided with transmission teeth; The second transmission member is a double gear, the belt is sleeved on three second transmission frames, and the transmission teeth are meshed and connected with the three second transmission members; The driving motor drives the worm to drive the first transmission member to rotate, so that the first transmission member drives the three second transmission members to rotate through the transmission belt.

4. The vehicle-mounted fixing base as claimed in claim 3, characterized in that: The vehicle-mounted fixed base also includes at least four bearings, which are rotatably connected to the base respectively, the first transmission member is connected to one of the bearings, and the remaining three bearings are connected to three second transmission members respectively.

5. The vehicle-mounted fixing base according to claim 1, characterized in that: The first transmission member and the three second transmission members are arranged in a rectangular manner in the installation cavity.

6. The vehicle-mounted fixing base according to claim 1, characterized in that: Each jaw includes: Mounting plate; a rack, the rack being detachably connected to a side surface of the mounting plate and being in transmission connection with the first transmission member or the second transmission member; and A clamping plate is connected to the mounting plate and is vertically arranged; and the clamping plate extends from the movable opening and abuts against the outer wall of the base.

7. The vehicle-mounted fixing base according to claim 6, characterized in that: A first elastic layer is disposed on one side of the splint.

8. The vehicle-mounted fixing base according to claim 1, characterized in that: At least four limiting protrusions are also provided on one side of the base where the movable opening is provided, and the four limiting protrusions are located at the four corners of the base.

9. The vehicle-mounted fixing base according to claim 8, characterized in that: Each of the limiting protrusions is provided with a second elastic layer.

10. The vehicle-mounted fixing base according to claim 8, characterized in that: A contact protrusion is also provided on one side of the base where the movable opening is provided. The contact protrusion is located at the center of the base and is spaced apart from the four limiting protrusions.

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