Electric automobile safety belt retractor

Abstract

The invention discloses an electric automobile safety belt retractor, and belongs to the technical field of new energy automobile safety, the electric automobile safety belt retractor comprises a retractor body, an installation protection mechanism is arranged on the outer side of the retractor body, and an auxiliary protection mechanism is arranged at the top of the retractor body; according to the invention, through the arrangement of the installation protection mechanism, during installation, only the retractor body needs to be placed at the top end of the supporting plate, the retractor body is pushed to drive the locking plate to slide backwards, the locking block is inserted into the locking groove so as to realize limiting, and linkage is generated among the rack I, the gear I, the gear II, the rack II, the connecting piece and the connecting plate; by means of the structure, the installation procedure is simplified, rapid installation and firm fixation of the retractor body can be achieved, and the assembling efficiency of the electric automobile is remarkably improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of new energy vehicle safety, and in particular relates to a seat belt retractor for an electric vehicle. Background Art

[0002] With the widespread use of electric vehicles in the automotive industry, the structure of the entire vehicle tends to be compact and lightweight, and the layout space of various components in the vehicle is strictly limited. The seat belt is a key component in the vehicle's passive safety system. Its retractor is usually installed on the B-pillar of the vehicle body or the side of the seat to achieve automatic retraction and release of the safety belt.

[0003] However, in practice, there are still some problems: 1. In existing technology, electric vehicles have compact internal structures, and seatbelt retractors are typically installed on the B-pillar or side of the seat. Traditional retractors often rely on bolts or welding, which is a complex and time-consuming installation process. Furthermore, they are prone to loosening or making unusual noises due to vehicle body vibration during use, impacting the vehicle's NVH performance. Furthermore, traditional retractors are typically hidden within the trim after installation, lacking a structure that facilitates maintenance. Later disassembly and installation are extremely inconvenient, and repairs and replacements require extensive removal of interior panels, increasing both the difficulty and cost of repairs.

[0004] 2. During the long-term use of the seat belt retractor, the safety belt is frequently pulled out and retracted. External impurities such as dust, fibers, and fine particles are easily brought into the retractor body along with the safety belt, causing wear and blockage of the internal mechanical structure, and even making it impossible to smoothly retract the safety belt. Existing devices usually lack real-time cleaning measures for impurities on the surface of the safety belt, resulting in a shortened maintenance cycle of the retractor and reduced reliability.

[0005] Based on this, the present invention designs an electric vehicle seat belt retractor to solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to solve the problems of complex installation, difficult maintenance and lack of cleaning of impurities on the surface of the safety belt of the existing retractor, and to propose an electric vehicle safety belt retractor.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions: A seat belt retractor for an electric vehicle comprises a retractor body, a mounting protection mechanism is provided on the outer side of the retractor body, an auxiliary protection mechanism is provided on the top of the retractor body, the mounting protection mechanism comprises a locking plate, a locking block, a rack and a locking groove, a locking groove is provided on the back side of the retractor body, the sizes of the locking groove and the locking block match each other, the top end of the locking plate is fixedly connected to the bottom end of the locking block, the auxiliary protection mechanism comprises a screw rod, a sliding support and a linkage plate, the sliding support is threadedly connected to the middle part of the screw rod, one side of the sliding support is fixedly connected to one end of the linkage plate, two magnetic blocks are provided on one side of the linkage plate, and one end of the linkage plate is fixedly connected to one of the magnetic blocks.

[0008] As a further description of the above technical solution: The top of the retractor body is connected to a safety fixing belt, the bottom of the retractor body is provided with a fixed base plate, the top of the fixed base plate is slidably connected to the bottom end of the locking plate, and the inner side of the locking plate is fixedly connected to a protective pad.

[0009] As a further description of the above technical solution: The inner side of the locking plate is fixedly connected to one end of rack one, and connecting parts are slidably connected to both sides of the top of the fixed base plate. The top of the fixed base plate is rotatably connected to gear one, and the bottom end of gear one is fixedly connected to gear two, and one side of gear one is meshed with one side of rack one.

[0010] As a further description of the above technical solution: Two racks 2 are respectively engaged on both sides of the gear 2, one end of the two racks 2 is respectively fixedly connected to the inner sides of the two connecting members, and one end of the two connecting members is fixedly connected to a connecting plate.

[0011] As a further description of the above technical solution: The inner sides of the two connecting plates are fixedly connected with buffer springs, the free ends of the two buffer springs are fixedly connected with buffer plates, and the inner sides of the two buffer plates are respectively attached to the two sides of the retractor body.

[0012] As a further description of the above technical solution: The top of the fixed base plate is fixedly connected to a support plate, the bottom of the retractor body and the top of the support plate are both provided with locking holes, the top of the support plate is provided with a locking handle, the bottom end of the locking handle is fixedly connected to a locking pin, and the bottom end of the locking pin passes through two locking holes in sequence.

[0013] As a further description of the above technical solution: The bottom end of the retractor body is placed on the top of the support plate, the top of the locking plate is fixedly connected to the top plate, one side of the top of the top plate is fixedly connected to the stabilizing plate, and one end of the screw rod is rotatably connected to the inner side of the stabilizing plate.

[0014] As a further description of the above technical solution: A sealing brush is fixedly embedded in the top of the top plate, one end of the safety fixing belt passes through the sealing brush, the inner side of the sealing brush is attached to the outer wall of the safety fixing belt, the top of the sealing brush is slidably connected to the magnetic block, and a cleaning brush is fixedly connected to the inner side of each magnetic block, and the cleaning brush is attached to the outer wall of the safety fixing belt.

[0015] As a further description of the above technical solution: Two transmission wheels are provided on one side of the top plate, and a transmission rod is rotatably connected to the inner side of the top plate. The inner side of the transmission rod is attached to one side of the safety fixing belt, and one end of the transmission rod is fixedly connected to one side of one of the transmission wheels. One side of one of the transmission wheels is rotatably connected to a connecting rod, and the connecting rod is fixedly connected to one side of the top plate.

[0016] As a further description of the above technical solution: A transmission belt is sleeved between the two transmission wheels, wherein the inner side of the other transmission wheel is rotatably connected to the other end of the screw rod, wherein the other transmission wheel is rotatably connected to the middle part of one side wall of the top plate, and the sliding support is slidably connected to the top end of the top plate.

[0017] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. In the present invention, by providing an installation protection mechanism, during installation, it is only necessary to place the retractor body on the top of the support plate, and push the retractor body to drive the locking plate to slide backward. The locking block is inserted into the locking groove to achieve position limiting. The rack 1, gear 1, gear 2, rack 2, connecting piece and connecting plate are linked to each other, so that the two buffer springs drive the buffer plates to fit on both sides of the retractor body. This structure simplifies the installation process, can achieve rapid installation and firm fixation of the retractor body, and significantly improve the assembly efficiency of electric vehicles.

[0018] 2. In the present invention, by providing an installation protection mechanism, during the installation of the retractor body, the buffer spring provided on the inner side of the connecting plate continues to provide an inward clamping force after locking is completed, so that the two buffer plates are stably fitted to both sides of the retractor body, which not only ensures the installation firmness of the retractor body, but also has a good shock-absorbing effect, and can effectively reduce the impact of vibration on the retractor body during the driving of the electric vehicle, reduce abnormal noise, and improve ride comfort and the durability of the retractor body.

[0019] 3. In the present invention, through the auxiliary protection mechanism, when the user pulls the safety belt, the cooperation of the transmission rod, the transmission wheel and the transmission belt drives the screw to rotate, and the rotation of the screw drives the sliding support to move. The sliding support drives the magnetic block and the cleaning brush thereon to move through the linkage plate to scrape and clean impurities on the surface of the sealing brush. At the same time, the sealing brush cleans the surface of the safety belt in real time to prevent impurities from entering the interior of the retractor body, effectively improving the smooth recovery performance of the safety belt and the service life of the retractor body, and significantly improving the reliability and durability of the electric vehicle safety belt system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural schematic diagram of the front portion of an electric vehicle seat belt retractor proposed by the present invention; Figure 2 This is a structural schematic diagram of the bottom portion of an electric vehicle seat belt retractor proposed by the present invention; Figure 3 This is a schematic diagram of the structural decomposition of the retractor body of an electric vehicle seat belt retractor proposed by the present invention; Figure 4 This is a structural schematic diagram of the top plate portion of an electric vehicle seat belt retractor proposed by the present invention; Figure 5 An electric vehicle seat belt retractor proposed by the present invention Figure 4 Enlarged view of point A in the middle; Figure 6 This is a schematic diagram of the structural decomposition of the buffer spring portion of the electric vehicle seat belt retractor proposed by the present invention; Figure 7 An electric vehicle seat belt retractor proposed by the present invention Figure 6 Enlarged view of point B in the middle; Figure 8 This is a schematic diagram of the structure of a rack portion of an electric vehicle seat belt retractor proposed by the present invention; Figure 9 An electric vehicle seat belt retractor proposed by the present invention Figure 8 Enlarged view of point C in the middle.

[0021] Legend: 1. Safety fixing belt; 2. Retractor body; 3. Installation protection mechanism; 301. Connecting plate; 302. Fixed bottom plate; 303. Locking handle; 304. Locking plate; 305. Protective pad; 306. Locking block; 307. Support plate; 308. Buffer spring; 309. Buffer plate; 310. Locking slot; 311. Rack 1; 312. Gear 1; 313. Connecting piece; 314. Locking pin; 315. Locking hole; 316. Gear 2; 317. Rack 2; 4. Auxiliary protection mechanism; 401. Top plate; 402. Connecting rod; 403. Sealing brush; 404. Transmission rod; 405. Transmission wheel; 406. Screw; 407. Stabilizing plate; 408. Cleaning brush; 409. Magnetic block; 410. Linkage plate; 411. Transmission belt; 412. Sliding support. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making any creative efforts shall fall within the scope of protection of the present invention.

[0023] See also Figures 1-9 The present invention provides a technical solution: an electric vehicle seat belt retractor, comprising a retractor body 2, a mounting protection mechanism 3 being provided on the outside of the retractor body 2, an auxiliary protection mechanism 4 being provided on the top of the retractor body 2, the mounting protection mechanism 3 comprising a locking plate 304, a locking block 306, a rack 1 311 and a locking groove 310, a locking groove 310 being provided on the back side of the retractor body 2, the locking groove 310 and the locking block 306 matching in size, the top of the locking plate 304 being fixedly connected to the bottom end of the locking block 306, the auxiliary protection mechanism 4 comprising a screw rod 406, a sliding support 412 and a linkage plate 410, the sliding support 412 being threadedly connected to the middle part of the screw rod 406, one side of the sliding support 412 being fixedly connected to one end of the linkage plate 410, two magnetic blocks 409 being provided on one side of the linkage plate 410, and one end of the linkage plate 410 being fixedly connected to one of the magnetic blocks 409.

[0024] Among the above components, the arrangement of the locking plate 304, the locking block 306 and the rack 1 311 in the installation protection mechanism 3 enables the retractor body 2 to be modularly positioned when installed on the vehicle structure. The locking groove 310, as a structural hole on the back side of the retractor body 2, cooperates with the size of the locking block 306, so that the installation action can be completed within a limited space. The fixed connection of the rack 1 311 inside the locking plate 304 helps to provide synchronous motion transmission during installation, so that the engagement of the gear 1 312 can be completed more smoothly. This design not only facilitates the common use of parts during mass production, but also facilitates operation in the narrow space of the electric vehicle body, thereby improving the overall assembly flexibility.

[0025] Specifically, such as Figure 1-Figure 3 and Figure 6-Figure 9 As shown, the top of the retractor body 2 is connected to the safety fixing belt 1, and the bottom of the retractor body 2 is provided with a fixed base plate 302. The top of the fixed base plate 302 is slidably connected to the bottom end of the locking plate 304, and the inner side of the locking plate 304 is fixedly connected to a protective pad 305.

[0026] Among the above components, the top of the retractor body 2 is connected to the safety fixing belt 1, and the bottom is provided with a fixed base plate 302. The sliding connection between the fixed base plate 302 and the bottom end of the locking plate 304 provides a certain degree of guidance during installation, which can reduce the deviation of manual assembly. The protective pad 305 is arranged on the inner side of the locking plate 304, which can provide buffering contact when the retractor body 2 is fixed to prevent assembly scratches due to direct metal collision. This structure not only meets the assembly requirements of electric vehicle interiors, but also avoids abnormal noise caused by vibration between the locking plate 304 and the retractor body 2, thereby improving stability in long-term use.

[0027] Specifically, such as Figure 1-Figure 3 and Figure 6-Figure 9 As shown, the inner side of the locking plate 304 is fixedly connected to one end of the rack 1 311, and the top sides of the fixed base plate 302 are slidably connected with connecting parts 313. The top of the fixed base plate 302 is rotatably connected to the gear 1 312, and the bottom end of the gear 1 312 is fixedly connected to the gear 2 316. One side of the gear 1 312 is meshed with one side of the rack 1 311.

[0028] In the above components, the inner side of the locking plate 304 is fixedly connected to the rack 1 311, and cooperates with the connecting piece 313 that is slidably connected on both sides of the fixed base plate 302, so that the rack 1 311 can drive the gear 1 312 to engage stably when sliding, and the bottom end of the gear 1 312 is connected to the gear 2 316, which can synchronously drive the structures on both sides when transmitting torque, avoiding the assembly tilt caused by unilateral force. The design of the engagement between the gear 1 312 and the rack 1 311 helps to achieve uniform clamping of the retractor body 2 during installation, reduce the difference in force between the left and right sides, and thus improve the fixation reliability on the vehicle body.

[0029] Specifically, such as Figure 1-Figure 3 and Figure 6-Figure 9 As shown, two rack gears 317 are meshed on both sides of the gear 2 316 , one end of the two rack gears 317 is fixedly connected to the inner side of the two connecting members 313 , and one end of the two connecting members 313 is fixedly connected to the connecting plate 301 .

[0030] In the above-mentioned components, two racks 317 are respectively engaged on both sides of the gear 2 316, so that the movement of the connecting member 313 can be synchronized in both directions. The inner sides of the two connecting members 313 are respectively fixedly connected to the connecting plates 301, so that when the retractor body 2 is fixed, both sides are clamped inward at the same time. The connecting plates 301 are arranged symmetrically, avoiding the installation imbalance caused by unilateral clamping, and are also convenient for adjustment in the narrow interior space of the vehicle body. This structure not only improves the uniformity of the overall installation, but also ensures consistent clamping force in mass production, reducing the impact of component tolerances.

[0031] Specifically, such as Figure 1-Figure 3 and Figure 6-Figure 9 As shown, the inner sides of the two connecting plates 301 are fixedly connected with buffer springs 308 , the free ends of the two buffer springs 308 are fixedly connected with buffer plates 309 , and the inner sides of the two buffer plates 309 are respectively attached to the two sides of the retractor body 2 .

[0032] In the above components, the inner sides of the two connecting plates 301 are fixedly connected with buffer springs 308, and the free ends of the buffer springs 308 are fixedly connected with buffer plates 309. After the installation is completed, the buffer springs 308 continue to provide inward pre-tightening force to make the buffer plates 309 fit the two sides of the retractor body 2. The buffer plates 309 are made of wear-resistant material, which can keep the contact surface stable under long-term vibration and avoid wear or noise caused by direct metal contact. For electric vehicles, this design can keep the retractor body 2 stable and not shifted under high-speed driving or bumpy road conditions, while reducing the vibration transmission inside the car.

[0033] Specifically, such as Figure 1-Figure 3 and Figure 6-Figure 9 As shown, the top of the fixed base plate 302 is fixedly connected to the support plate 307, and locking holes 315 are provided at the bottom of the retractor body 2 and the top of the support plate 307. A locking handle 303 is provided on the top of the support plate 307, and the bottom end of the locking handle 303 is fixedly connected to a locking pin 314, and the bottom end of the locking pin 314 passes through the two locking holes 315 in sequence.

[0034] Among the above components, the top of the fixed base plate 302 is fixedly connected to the support plate 307, and locking holes 315 are provided at the bottom of the retractor body 2 and the top of the support plate 307. Together with the locking handle 303 and the locking pin 314, the installed retractor body 2 can be quickly unlocked without disassembling other structures. The locking pin 314 passes through the two locking holes 315 in sequence to form a double-point fixation, thereby improving the overall fixing force and vibration resistance. The support plate 307 serves as a load-bearing component, and its structural strength design meets the safety standards of electric vehicles, and can withstand the use load for a long time and maintain position accuracy.

[0035] Specifically, such as Figure 1-Figure 3 and Figure 6-Figure 9 As shown, the bottom end of the retractor body 2 is placed on the top of the support plate 307, the top of the locking plate 304 is fixedly connected to the top plate 401, the top side of the top plate 401 is fixedly connected to the stabilizing plate 407, and one end of the screw rod 406 is rotatably connected to the inner side of the stabilizing plate 407.

[0036] Among the above components, the bottom end of the retractor body 2 is placed on the top of the support plate 307, the top of the locking plate 304 is fixedly connected to the top plate 401, and one side of the top of the top plate 401 is fixedly connected to the stabilizing plate 407. One end of the screw rod 406 is rotatably connected to the inner side of the stabilizing plate 407, so that the screw rod 406 has higher stability when rotating. The combined structure of the top plate 401 and the stabilizing plate 407 forms a frame-type support in a limited space to avoid swinging when the screw rod 406 rotates. This design provides a reliable installation reference for the linkage of the subsequent cleaning mechanism, and is also convenient for disassembly and inspection directly through the top plate 401 during later maintenance.

[0037] Specifically, such as Figure 3-Figure 5 As shown, a sealing brush 403 is fixedly embedded on the top of the top plate 401, one end of the safety fixing belt 1 passes through the sealing brush 403, the inner side of the sealing brush 403 is attached to the outer wall of the safety fixing belt 1, and the top of the sealing brush 403 is slidably connected to the magnetic block 409. A cleaning brush 408 is fixedly connected to the inner side of each magnetic block 409, and the cleaning brush 408 is attached to the outer wall of the safety fixing belt 1.

[0038] In the aforementioned components, a sealing brush 403 is fixedly embedded in the top of the top plate 401. One end of the safety strap 1 passes through the sealing brush 403, and the inner side of the sealing brush 403 contacts the outer wall of the safety strap 1, effectively scraping away adhering impurities as the safety strap 1 moves. The top of the sealing brush 403 is slidably connected to a magnetic block 409, each of which is fixedly connected to a cleaning brush 408 on the inner side. The cleaning brush 408 contacts the outer wall of the safety strap 1. This multi-stage cleaning structure prevents impurities from entering the interior of the retractor body 2. This design does not affect the smooth retraction of the safety strap 1 and can maintain internal cleanliness even after long-term use.

[0039] Specifically, such as Figure 3-Figure 5 As shown, two transmission wheels 405 are provided on one side of the top plate 401, and the inner side of the top plate 401 is rotatably connected to a transmission rod 404, the inner side of the transmission rod 404 is attached to one side of the safety fixing belt 1, and one end of the transmission rod 404 is fixedly connected to one side of one of the transmission wheels 405, and one side of one of the transmission wheels 405 is rotatably connected to a connecting rod 402, and the connecting rod 402 is fixedly connected to one side of the top plate 401.

[0040] In the above-mentioned components, two transmission wheels 405 are provided on one side of the top plate 401, and the inner side of the top plate 401 is rotatably connected to the transmission rod 404, and the inner side of the transmission rod 404 is in contact with one side of the safety fixing belt 1. One end of the transmission rod 404 is fixedly connected to one side of one of the transmission wheels 405, and power is transmitted through rotation. One side of the other transmission wheel 405 is rotatably connected to the connecting rod 402, and the connecting rod 402 is fixedly connected to one side of the top plate 401 to form a stable power support point. The double transmission wheel 405 structure enables the force when pulling the safety fixing belt 1 to be evenly distributed, reducing the eccentric wear or noise caused by single-point transmission.

[0041] Specifically, such as Figure 3-Figure 5 As shown, a transmission belt 411 is sleeved between the two transmission wheels 405, wherein the inner side of the other transmission wheel 405 is rotatably connected to the other end of the screw rod 406, wherein the other transmission wheel 405 is rotatably connected to the middle of one side wall of the top plate 401, and the sliding support 412 is slidably connected to the top of the top plate 401.

[0042] In the above components, a transmission belt 411 is arranged between the two transmission wheels 405, and the inner side of the other transmission wheel 405 is rotatably connected to the other end of the screw rod 406. The transmission wheel 405 is rotatably connected to the middle part of the side wall of the top plate 401, and the sliding support 412 is slidably connected to the top of the top plate 401, so that the transmission mechanism and the cleaning mechanism form an integral linkage, and the two transmission wheels 405 are rotated synchronously through the transmission belt 411, so that the screw rod 406 obtains stable power input, and the sliding support 412 moves smoothly under the drive of the screw rod 406, thereby driving the linkage plate 410 and the magnetic block 409 to perform synchronous action to ensure uniform cleaning effect.

[0043] Working principle, when in use: when installing the retractor body 2, first place the retractor body 2 on the top of the support plate 307, so that the bottom end of the retractor body 2 is placed stably on the top surface of the support plate 307, and then in the process of pushing the installation, the retractor body 2 is displaced along the direction of the support plate 307. Under the action of the pushing force, the retractor body 2 can drive the locking plate 304 matched with it to slide backward. When the locking plate 304 moves, the locking block 306 fixedly connected to the top of the locking plate 304 will be inserted into the locking groove set on the back side of the retractor body 2. 310, the retractor body 2 is fixed in the installation position. At the same time, the rack 1 311 fixedly connected to the inner side of the locking plate 304 moves as a whole with the locking plate 304, driving the gear 1 312 meshed with one side of the rack 1 311 to rotate. When the gear 1 312 rotates, the rotational force is transmitted to the gear 2 316 through the gear 2 316 fixedly connected to its bottom end. Since the two sides of the gear 2 316 are respectively meshed with the two rack 2 317, the gear 2 316 can simultaneously drive the two rack 2 317 to move in a straight line toward or away from each other when rotating. During the movement of 17, the two connecting members 313 fixed at one end of the two racks 317 will move synchronously therewith, and the other ends of the two connecting members 313 are fixedly connected to the two connecting plates 301. As the connecting members 313 move, the two connecting plates 301 gradually approach the retractor body 2, so that the two buffer springs 308 wrapped inside the two connecting plates 301 are compressed. The free ends of the two buffer springs 308 drive the two buffer plates 309 to squeeze inward, so that the inner sides of the two buffer plates 309 are tightly fitted to the two sides of the retractor body 2. Through the above series of mechanical transmission and During the linkage process, the retractor body 2 is not only initially limited by inserting the locking block 306 into the locking groove 310 during installation, but also the linkage between the rack 1 311, the gear 1 312, the gear 2 316, the rack 2 317, the connecting piece 313 and the connecting plate 301 allows the two buffer plates 309 to finally fit onto both sides of the retractor body 2 under the action of the buffer spring 308, forming a secure, stable installation state with a buffering and protective effect. This ensures the secure installation of the retractor body 2 and provides good shock absorption and protection during the operation of the electric vehicle. The auxiliary protection mechanism 4 is provided in conjunction with the auxiliary protection mechanism 4, which includes a screw rod 406, a sliding support 412 and a linkage plate 410. The sliding support 412 is threadedly connected to the middle part of the screw rod 406, and one side of the sliding support 412 is fixedly connected to one end of the linkage plate 410. When the user pulls the safety fixing belt 1 in use, one end of the safety fixing belt 1 passes through the sealing brush 403 and fits against the inner side of the transmission rod 404. The safety fixing belt 1 can drive the transmission rod 404 to rotate during the pulling process. The transmission rod 404 transmits power to the transmission wheel 405 on the other side through the transmission wheel 405 fixedly connected thereto, and transmits power to the transmission wheel 405 on the other side through the transmission belt set between the two. 411 realizes synchronous rotation, so that the transmission wheel 405 drives the screw rod 406 to rotate. When the screw rod 406 rotates, the threaded cooperation between the middle part of the screw rod 406 and the sliding support 412 converts the rotational motion into a linear motion, so that the sliding support 412 produces a smooth sliding movement on the top of the top plate 401. When the sliding support 412 moves, it will drive the linkage plate 410 fixed thereon to move as a whole, thereby driving the two magnetic blocks 409 fixed on the linkage plate 410 to move. The inner sides of the two magnetic blocks 409 are fixedly connected to the cleaning brushes 408. When the magnetic blocks 409 move, the two cleaning brushes 408 will scratch and Cleaning function: During the whole process, the inner side of the sealing brush 403 is always in contact with the outer wall of the safety fixing belt 1. When the safety fixing belt 1 is pulled out or recovered, the sealing brush 403 can clean and brush the dust, particles and other impurities on the surface of the safety fixing belt 1, so that the impurities are separated from the safety fixing belt 1 and accumulated on the surface of the sealing brush 403. Subsequently, the sliding support 412 is driven to move by the screw rod 406, and the sliding support 412 drives the two magnetic blocks 409 through the linkage plate 410, so that the two cleaning brushes 408 scrape and clean the impurities accumulated on the surface of the sealing brush 403. Through this series of transmission and linkage, the clean state of the sealing brush 403 can be ensured. , further ensuring that the safety fixing belt 1 can still be smoothly reeled after long-term use and will not be stuck due to accumulation of impurities. In summary, the present invention provides an installation protection mechanism 3, so that the retractor body 2 can be quickly installed and has good protection and shock absorption effects; at the same time, through the auxiliary protection mechanism 4, when the safety fixing belt 1 is pulled, the transmission structure is used to drive the screw rod 406 and the sliding support 412, so that the linkage plate 410 drives the two magnetic blocks 409 to cooperate with the two cleaning brushes 408 to clean the impurities on the surface of the sealing brush 403, thereby effectively preventing impurities from entering the interior of the retractor body 2, thereby improving the reliability and durability of the electric vehicle safety belt system.

[0044] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. An electric vehicle seat belt retractor, comprising a retractor body (2), characterized in that: The outer side of the retractor body (2) is provided with a mounting protection mechanism (3), the top of the retractor body (2) is provided with an auxiliary protection mechanism (4), the mounting protection mechanism (3) comprises a locking plate (304), a locking block (306), a rack (311) and a locking groove (310), the back side of the retractor body (2) is provided with a locking groove (310), the size of the locking groove (310) and the locking block (306) are matched with each other, and the top of the locking plate (304) is fixedly connected to the locking block (306). At the bottom end of the locking block (306), the auxiliary protection mechanism (4) includes a screw rod (406), a sliding support (412) and a linkage plate (410), wherein the sliding support (412) is threadedly connected to the middle portion of the screw rod (406), one side of the sliding support (412) is fixedly connected to one end of the linkage plate (410), and two magnetic blocks (409) are provided on one side of the linkage plate (410), and one end of the linkage plate (410) is fixedly connected to one of the magnetic blocks (409).

2. The electric vehicle seat belt retractor according to claim 1, characterized in that: The top of the retractor body (2) is connected to a safety fixing belt (1), and the bottom of the retractor body (2) is provided with a fixed base plate (302). The top of the fixed base plate (302) is slidably connected to the bottom of a locking plate (304), and a protective pad (305) is fixedly connected to the inner side of the locking plate (304).

3. The electric vehicle seat belt retractor according to claim 2, characterized in that: The inner side of the locking plate (304) is fixedly connected to one end of rack one (311), and both sides of the top of the fixed base plate (302) are slidably connected to connecting members (313), the top of the fixed base plate (302) is rotatably connected to gear one (312), and the bottom end of gear one (312) is fixedly connected to gear two (316), and one side of gear one (312) is meshed with one side of rack one (311).

4. The electric vehicle seat belt retractor according to claim 3, characterized in that: Two rack gears (317) are respectively engaged on both sides of the gear (316), one end of each of the rack gears (317) is fixedly connected to the inner sides of two connecting members (313), and one end of each of the connecting members (313) is fixedly connected to a connecting plate (301).

5. The electric vehicle seat belt retractor according to claim 4, characterized in that: The inner sides of the two connecting plates (301) are fixedly connected to buffer springs (308), the free ends of the two buffer springs (308) are fixedly connected to buffer plates (309), and the inner sides of the two buffer plates (309) are respectively attached to the two sides of the retractor body (2).

6. The electric vehicle seat belt retractor according to claim 5, characterized in that: The top of the fixed base plate (302) is fixedly connected to a support plate (307), the bottom of the retractor body (2) and the top of the support plate (307) are both provided with locking holes (315), the top of the support plate (307) is provided with a locking handle (303), the bottom end of the locking handle (303) is fixedly connected to a locking pin (314), and the bottom end of the locking pin (314) passes through the two locking holes (315) in sequence.

7. The electric vehicle seat belt retractor according to claim 6, characterized in that: The bottom end of the retractor body (2) is placed on the top end of the support plate (307), the top end of the locking plate (304) is fixedly connected to the top plate (401), one side of the top end of the top plate (401) is fixedly connected to the stabilizing plate (407), and one end of the screw rod (406) is rotatably connected to the inner side of the stabilizing plate (407).

8. The electric vehicle seat belt retractor according to claim 7, characterized in that: A sealing brush (403) is fixedly embedded in the top of the top plate (401), one end of the safety fixing belt (1) passes through the sealing brush (403), the inner side of the sealing brush (403) is attached to the outer wall of the safety fixing belt (1), the top of the sealing brush (403) is slidably connected to the magnetic block (409), and a cleaning brush (408) is fixedly connected to the inner side of each magnetic block (409), and the cleaning brush (408) is attached to the outer wall of the safety fixing belt (1).

9. The electric vehicle seat belt retractor according to claim 8, characterized in that: Two transmission wheels (405) are provided on one side of the top plate (401), a transmission rod (404) is rotatably connected to the inner side of the top plate (401), the inner side of the transmission rod (404) is attached to one side of the safety fixing belt (1), one end of the transmission rod (404) is fixedly connected to one side of one of the transmission wheels (405), one side of one of the transmission wheels (405) is rotatably connected to a connecting rod (402), and the connecting rod (402) is fixedly connected to one side of the top plate (401).

10. The electric vehicle seat belt retractor according to claim 9, characterized in that: A transmission belt (411) is sleeved between the two transmission wheels (405), wherein the inner side of the other transmission wheel (405) is rotatably connected to the other end of the screw rod (406), wherein the other transmission wheel (405) is rotatably connected to the middle part of a side wall of the top plate (401), and the sliding support (412) is slidably connected to the top end of the top plate (401).

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