Anti-backlash locking structure of gear disc of automobile seat rotating device

Abstract

A kind of gear disc anti-backlash locking structure of automobile seat rotating device, automobile seat rotating device includes gear disc, gear disc cavity inner gear ring is formed on the cavity wall of gear disc cavity;Upper moving disc and lower moving disc correspond to each other and are mutually fixed;Output gear drive and output gear;Characteristics are as follows:Gear disc anti-backlash locking structure includes a set of anti-backlash anti-impact locking mechanism and gear disc pressing ring, a set of anti-backlash anti-impact locking mechanism is arranged in the side surface of gear disc towards upper side around the circumferential direction of gear disc, gear disc pressing ring is sleeved in a set of anti-backlash anti-impact locking mechanism, a set of gear disc pressing ring support blocks is extended at equal distance interval on the cavity wall of gear disc pressing ring cavity and is blocked, the side of a set of anti-backlash anti-impact locking mechanism towards inside is formed with no-gap anti-impact rotary pair by the rim of upper moving disc and a set of anti-backlash anti-impact locking mechanism and a set of anti-backlash anti-impact locking mechanism is limited in corresponding defined cavity. Advantage: anti-backlash effect is ideal, vehicle does not cause abnormal rotation of automobile seat under special conditions, and safety is fully guaranteed.

Description

Technical Field

[0001] This utility model belongs to the technical field of automotive seat components, specifically relating to a toothed disc backlash-eliminating locking structure for an automotive seat rotation device. Background Technology

[0002] As is known in the industry, the aforementioned car seat rotation device is a mechanical or electric mechanism that allows car seats to rotate around a vertical axis (or a specific axis), aiming to improve the flexibility, comfort, and versatility of the vehicle's interior space. Its core concept is to achieve free adjustment of the car seat angle through structural design and then fix it in place after adjustment. Typical applications include commercial vehicles / MPVs, where the second-row seats rotate 180° to face the third row, creating a meeting or family interaction space (such as the Toyota Alphard and Mercedes-Benz V-Class). The aforementioned gap elimination and reliable locking are crucial technical indicators that cannot be ignored when considering the safety and comfort of a car seat rotation device. Regarding gap elimination, its significance lies in stability and comfort, durability (gap elimination helps extend the life of the mechanism), and safety redundancy (gap can cause unexpected seat displacement; gap elimination can reduce or even avoid such risks). Regarding reliable locking, its significance lies in safety; for example, if the seat remains reliably locked during a collision, it can prevent secondary injuries; or, for example, if the locking is unreliable when a commercial vehicle rotates to a face-to-face seating mode, it can cause the car seat to rebound, seriously affecting the user experience, and so on.

[0003] Existing technologies for locking the gear plate of a car seat rotation device at an adjusted angle or position mainly take the following forms: The car seat is mounted on a rotating plate. A rotating motor on the plate operates, and through the meshing of the rotating gear with the teeth on a fixed plate, the rotating plate drives the car seat to rotate, for example, 180°. Then, a locking pin is inserted into a limiting hole through a locking pin port to achieve locking. To unlock, the output shaft of the locking motor operates normally, causing the locking pin to retract, thus unlocking. A representative patent of this structure is CN222223952U, "Rotation and Locking Structure of a Car Seat." Because it requires a rotating motor and an unlocking / locking motor—that is, two sets of motors—the structure is not only complex but also has high manufacturing costs. Furthermore, it lacks backlash elimination and is insufficient to provide an ideal locking function (because it is only a single-point lock and cannot achieve overall circumferential locking). For example, when the seat needs to rotate, a rotation signal is sent to the turntable motor. Upon receiving the signal, the motor drives the pinion gear to rotate. The pinion gear, through meshing, drives the turntable mechanism to rotate, which in turn drives the seat frame to rotate, ultimately achieving 180° forward and reverse rotation of the seat. This structure can be seen in "A Rotating Car Seat" provided by CN220429943U. Compared to the aforementioned CN222223952U, this patent reduces manufacturing costs because it does not require a pair of motors. However, the locking mechanism relies solely on the meshing of the pinion gear and the turntable, thus it is, in a sense, a single-point or single-part locking mechanism, making the locking force equally weak. Moreover, this patent does not achieve the desired backlash elimination effect. Utility Model Content

[0004] The objective of this invention is to provide a toothed disc backlash-eliminating locking structure for a car seat rotation device that can achieve both an ideal backlash elimination effect and a reliable locking function, thereby preventing abnormal rotation of the car seat in situations such as sudden acceleration, emergency braking and turning, and collisions, thus ensuring safety.

[0005] The present invention achieves its objective as follows: a backlash-eliminating locking structure for a car seat rotating device, comprising a toothed disc, wherein an inner toothed ring is formed on the cavity wall of the toothed disc cavity and around the cavity wall; an upper moving disc and a lower moving disc, which are vertically aligned and fixed to each other at positions corresponding to the toothed disc cavity; an output gear drive device and an output gear, wherein the output gear drive device is fixed to the lower moving disc and forms an internal meshing gear transmission pair with the output gear and is also connected to the upper moving disc, and the output gear forms a meshing pair with the inner toothed ring of the toothed disc cavity; the backlash-eliminating locking structure comprises a set of backlash-eliminating and impact-resistant locking mechanisms and a toothed disc pressure ring, the set of backlash-eliminating and impact-resistant locking mechanisms surrounding the circumference of the toothed disc. The toothed disc is arranged at equal intervals on the upward-facing side surface of the toothed disc. The toothed disc pressure ring is fitted outside a set of backlash-free and shock-resistant locking mechanisms. On the cavity wall of the toothed disc pressure ring cavity and extending towards the center of the toothed disc pressure ring cavity at equal intervals, there is a set of toothed disc pressure ring support blocks, the number of which is equal to the number of the set of backlash-free and shock-resistant locking mechanisms. The space between each pair of adjacent backlash-free and shock-resistant locking mechanisms in the set of backlash-free and shock-resistant locking mechanisms is matched, and the space between each pair of adjacent toothed disc pressure ring support blocks forms a limiting cavity. The upper moving disc edge and the inward-facing side of the set of backlash-free and shock-resistant locking mechanisms form a backlash-free and shock-resistant rotating pair, and restrict the set of backlash-free and shock-resistant locking mechanisms within the corresponding limiting cavity.

[0006] In a specific embodiment of this utility model, the toothed disc is mounted on the toothed disc support in the use state, and the toothed disc support is supported on the fixed disc. The upper moving disc is fixed to the support disc drive disc at a position below the support disc drive disc in the use state. The support disc drive disc is fixed to the support disc through a set of spaced support disc drive disc free-standing feet. The toothed disc pressure ring is fixed to both the toothed disc support disc and the fixed disc.

[0007] In another specific embodiment of this utility model, each of the set of backlash-eliminating and impact-resistant locking mechanisms includes a toothed disc boss, a pair of rollers, and a pair of support blocks. The toothed disc boss is directly formed on the upward-facing side of the toothed disc, and the pair of rollers and the pair of support blocks are placed on the upward-facing side of the toothed disc. One of the rollers is located longitudinally between one side of the toothed disc boss and one of the longitudinally positioned support blocks, while the other roller is located longitudinally between the other side of the toothed disc boss and the other longitudinally positioned support block. Between; wherein, the space between each pair of adjacent gap-free and impact-resistant locking mechanisms in a set of gap-free and impact-resistant locking mechanisms constitutes a support block partitioning cavity, the toothed disc pressure ring support block partition is fitted with the support block partitioning cavity, the cavity shape of the defined cavity is adapted to the shape formed by the toothed disc boss, a pair of rollers and a pair of support blocks arranged in an arc on the side of the toothed disc facing upward; after the upper moving disc is set in the toothed disc pressure ring cavity of the toothed disc pressure ring, the upper moving disc edge and the side of the pair of rollers facing the toothed disc pressure ring cavity constitute a gapless impact-resistant rotating pair.

[0008] In another specific embodiment of this utility model, the pair of support blocks are made of rubber or nylon.

[0009] In another specific embodiment of this utility model, a set of worm gear reducer mounting screw holes are provided on the lower moving plate at intervals corresponding to the position of the output gear drive device; a worm gear shaft transmission connection hole is provided on the upper moving plate at the same position corresponding to the output gear drive device; the output gear drive device includes a motor, a worm gear reducer, and a worm gear reducer mounting base, the motor is horizontally connected to the worm gear reducer, and the worm gear reducer connects the motor and the worm gear reducer. The fixed base is fixed, and the worm gear reducer fixed base is located below the lower moving plate and is fixed to the set of worm gear reducer base fixing screw holes by a set of spaced worm gear reducer base fixing screws. The worm wheel shaft of the worm gear reducer extends upward to the outside of the worm gear reducer housing, and the upper end of the worm wheel shaft is connected to the worm wheel shaft transmission connection hole. A worm wheel shaft gear is formed on the shaft body in the middle of the worm wheel shaft and around the worm wheel shaft. The worm wheel shaft gear and the output gear form an internal meshing transmission pair.

[0010] In another specific embodiment of this utility model, an output gear bushing support hole is formed on the lower moving plate at a position corresponding to the output gear and the worm gear shaft. An output gear rotating support sleeve extends from the lower part of the output gear and rotates with the output gear bushing support hole. A worm gear shaft insertion hole is formed at the center of the output gear, and the worm gear shaft insertion hole penetrates the output gear rotating support sleeve. An output gear internal gear ring is formed longitudinally on the hole wall of the worm gear shaft insertion hole and around the hole wall. The worm gear shaft and the output gear internal gear ring form a meshing transmission pair in the worm gear shaft insertion hole.

[0011] In a further specific embodiment of this utility model, lower moving plate screw fixing holes are provided at intervals on the lower moving plate and around its circumference, and lower moving plate fixing screws are provided in the lower moving plate screw fixing holes; upper moving plate screw fixing holes are provided on the upper moving plate at positions corresponding to the lower moving plate screw fixing holes, and the lower moving plate is fixed to the upper moving plate at a position below the upper moving plate by the lower moving plate fixing screws at positions corresponding to the upper moving plate screw fixing holes; a lower moving plate wire passing hole is provided on the lower moving plate body, penetrating the thickness direction of the lower moving plate body, and a similar upper moving plate wire passing hole is provided on the upper moving plate at a position corresponding to the lower moving plate wire passing hole, penetrating the thickness direction of the upper moving plate body.

[0012] In a further specific embodiment of this utility model, the fixed plate is provided with fixed plate fixing bracket screw fixing holes in pairs around the circumference of the fixed plate for fixing to the end of the fixed plate fixing frame facing the fixed plate. Fixed plate fixing bracket screws are provided in the fixed plate fixing bracket screw fixing holes. A pair of fixed plate fixing bracket screw holes are provided at the end of the fixed plate fixing frame facing the fixed plate. The fixed plate is fixed to the end of the fixed plate fixing frame facing the fixed plate by the fixed plate fixing bracket screws passing through the fixed plate fixing bracket screw fixing holes and the fixed plate fixing bracket screw holes in sequence from top to bottom. The middle part of the fixed plate fixing frame is recessed downward to form a support plate support cavity. A base plate fixing connection hole is provided at the end of the fixed plate fixing frame away from the fixed plate.

[0013] In another specific embodiment of this utility model, a set of screw tail support cavities are formed at the edge of the upward-facing side surface of the lower moving plate and at intervals around the circumference of the lower moving plate; a set of drive plate connecting screw holes are provided at intervals around the circumference of the upper moving plate body on the upper moving plate, the set of drive plate connecting screw holes corresponding to the set of screw tail support cavities, and a drive plate connecting screw is provided at each position corresponding to the set of drive plate connecting screw holes; a set of support plate drive plate screw holes are provided at intervals on the support plate drive plate and at positions corresponding to the drive plate connecting screw holes; the drive plate connecting screw passes through the drive plate connecting screw holes and the support plate drive plate screw holes sequentially from the lower part of the upper moving plate upward and is locked by a locking nut screwed on the upper end of the drive plate connecting screw, and the tail of the drive plate connecting screw is supported on the set of screw tail support cavities.

[0014] In another specific embodiment of this utility model, a toothed disc retaining lug extends at intervals along the circumference of the toothed disc retaining lug at its edge. A toothed disc retaining lug screw hole is provided on each retaining lug, and this screw hole corresponds to and coincides with the screw hole on the fixed disc. A toothed disc retaining ring retaining lug extends along the circumference of the toothed disc retaining ring and at a position corresponding to the toothed disc retaining lug. A toothed disc retaining ring retaining lug is provided on each retaining ring retaining lug. There is a toothed disc retaining ring fixing lug screw, which is screwed into the toothed disc support retaining lug screw hole and the fixed disc screw hole from top to bottom and extends to the bottom of the fixed disc and is locked by the toothed disc retaining ring fixing lug screw locking nut screwed on the lower end of the toothed disc retaining ring fixing lug screw; a downwardly recessed toothed disc receiving cavity is formed on the inner side of the toothed disc support and around the toothed disc support; the toothed disc is set on the side of the toothed disc support facing upward at the position corresponding to the toothed disc receiving cavity; the central area of ​​the toothed disc support forms the toothed disc support center cavity.

[0015] The advantages of the technical solution provided by this utility model are as follows: A set of backlash-eliminating and anti-impact locking mechanisms, along with a toothed disc pressure ring fitted around the toothed disc and arranged at equal intervals along its circumference on the upward-facing side of the toothed disc, constitute a structural system. Furthermore, a set of toothed disc pressure ring support blocks, equal in number to the set of backlash-eliminating and anti-impact locking mechanisms, extend at equal intervals along the cavity wall of the toothed disc pressure ring cavity towards its center. The space between each pair of adjacent toothed disc pressure ring support blocks... The space between the upper and lower moving plates forms a defined cavity, thus enabling the upper moving plate edge and the inward-facing side of a set of backlash-eliminating and anti-impact locking mechanisms to form a good anti-impact rotating pair and confine the set of backlash-eliminating and anti-impact locking mechanisms within the corresponding defined cavity. The upper moving plate, together with the lower moving plate, can rotate freely during rotation. In the non-rotating state after the car seat angle is adjusted, it can achieve an ideal backlash elimination effect, without even the slightest wobbling. In situations such as sudden acceleration, emergency braking and turning, and collision impacts, the car seat will not rotate abnormally, thus fully ensuring safety. Attached Figure Description

[0016] Figure 1 This is a structural diagram of an embodiment of the gear-disc backlash-eliminating locking structure of the automobile seat rotation device of this utility model;

[0017] Figure 2 for Figure 1 A schematic diagram showing the connection between the upper moving disk and the toothed disk pressure ring of the structure shown, respectively, and the support disk drive disk and the toothed disk tray.

[0018] Figure 3 This is a schematic diagram of the support plate, chassis, turntable, and seat mounting plate of the structural system of the automobile seat rotation device of this utility model;

[0019] Figure 4 for Figure 2 as well as Figure 3 A schematic diagram after assembly. Detailed Implementation

[0020] In order to better understand the technical essence and beneficial effects of this utility model, the applicant provides a detailed description below by way of embodiments. However, the description of the embodiments is not intended to limit the solution of this utility model. Any formal but not substantive equivalent transformations made based on the concept of this utility model should be considered within the scope of the technical solution of this utility model.

[0021] In the following description, all directional or orientational concepts involving up, down, left, right, front, and back are based on Figure 1The current position is used as an example and should not be construed as a specific limitation on the technical solution provided by this utility model. Furthermore, the term "barrier" in the following text refers to a combination of separation and obstruction.

[0022] Please see Figure 1 and Figure 2 The diagram illustrates the structural system of the aforementioned automotive seat rotation device, including a gear disk 1, with an inner gear ring 111 formed on the cavity wall of the gear disk 11 and surrounding the cavity wall; an upper moving disk 2 and a lower moving disk 3, which are vertically aligned and fixed to each other in positions corresponding to the gear disk cavity 11; an output gear drive device 4 and an output gear 5, the output gear drive device 4 being fixed to the lower moving disk 3 and forming an internal meshing gear transmission pair with the output gear 5, and also being connected to the aforementioned upper moving disk 2, while the output gear 5 forming a meshing pair with the aforementioned inner gear ring 111; and a set of backlash-eliminating and impact-resistant locking mechanisms 6 and a gear disk pressure ring 7, shown in the structural system of the gear disk backlash-eliminating and locking structure. The set of backlash-eliminating and impact-resistant locking mechanisms 6 are arranged at equal intervals around the circumference of the aforementioned gear disk 1. On the upward-facing surface of disk 1, the aforementioned toothed disc pressure ring 7 is fitted outside a set of backlash-free and anti-impact locking mechanisms 6. On the cavity wall of the toothed disc pressure ring cavity 71 of the toothed disc pressure ring 7, and extending towards the center of the toothed disc pressure ring cavity 71 at equal intervals, there is a set of toothed disc pressure ring support block spacers 711, the number of which is equal to the number of the set of backlash-free and anti-impact locking mechanisms 6. The set of toothed disc pressure ring support block spacers 711 cooperates with the space between each pair of adjacent backlash-free and anti-impact locking mechanisms 6 in the set of backlash-free and anti-impact locking mechanisms 6, and the space between each pair of adjacent toothed disc pressure ring support block spacers 711 forms a limiting cavity 7111. The upper moving disc edge 21 of the aforementioned upper moving disc 2 and the inward-facing side of the set of backlash-free and anti-impact locking mechanisms 6 form a backlash-free anti-impact rotating pair and restrict the set of backlash-free and anti-impact locking mechanisms 6 within the corresponding limiting cavity 7111.

[0023] Depend on Figure 2As shown, the aforementioned gear disc 1, in its operational state, is mounted on the gear disc tray 12, a component belonging to the structural system of the automotive seat rotation device. This gear disc tray 12 is supported on the fixed disc 121. The aforementioned upper moving disc 2, in its operational state, is positioned below a support disc drive disc 8, also belonging to the structural system of the automotive seat rotation device, and is fixed to the support disc drive disc 8. This support disc drive disc 8 is fixed to the support disc 9 by a set of spaced-apart support disc freestanding feet 81. The aforementioned gear disc pressure ring 7 is simultaneously fixed to both the gear disc tray 12 and the fixed disc 121. In this embodiment, the number of the aforementioned set of support disc drive disc freestanding feet 81 is three, evenly spaced around the circumference of the support disc drive disc 8, but is not limited to three. For example, it can be increased to four or five, but when reduced, it cannot be less than three; that is, at least three. Otherwise, the stability of the support provided by the set of support disc drive disc freestanding feet 81 to the support disc drive disc 8 will be affected. Therefore, using three support disc drive disc freestanding feet 81 is preferred.

[0024] See you later Figure 1 and Figure 2 Each of the aforementioned set of backlash-eliminating and impact-resistant locking mechanisms 6 includes a toothed disc boss 61, a pair of rollers 62, and a pair of support blocks 63. The toothed disc boss 61 is directly formed on the upward-facing side of the aforementioned toothed disc 1. The pair of rollers 62 and the pair of support blocks 63 are placed on the upward-facing side of the toothed disc 1. One of the rollers 62 is located longitudinally between one side of the toothed disc boss 61 and one of the longitudinally positioned support blocks 63, while the other roller is located longitudinally between the other side of the toothed disc boss 61 and the other longitudinally positioned support block 63. The set of backlash-eliminating and impact-resistant mechanisms... The space between each pair of adjacent gap-free and impact-resistant locking mechanisms in the locking mechanism 6 is configured as a support block partition cavity 64. The aforementioned toothed disc pressure ring support block partition 711 is fitted into the support block partition cavity 64. The cavity shape of the aforementioned toothed disc pressure ring support block partition 711 is adapted to the shape formed by the aforementioned toothed disc boss 61, a pair of rollers 62 and a pair of support blocks 63 arranged in an arc on the upward side of the aforementioned toothed disc 1. After the aforementioned upper moving disc 2 is disposed in the toothed disc pressure ring cavity 71 of the aforementioned toothed disc pressure ring 7, the aforementioned upper moving disc edge 21 of the upper moving disc 2 and the aforementioned pair of rollers 62 on the side facing the aforementioned toothed disc pressure ring cavity 71 form a gapless and impact-resistant rotating pair.

[0025] In this embodiment, the aforementioned pair of support blocks 63 are made of rubber, but support blocks 63 made of nylon or other equivalent materials may also be used.

[0026] The applicant should clarify that although the number of the set of gap-eliminating and anti-impact locking mechanisms 6 exemplified in this embodiment is nine (also referred to as "nine sets"), and the number of the corresponding toothed disc pressure ring support block spacers 711 and the number of the limiting cavities 7111 formed between each pair of adjacent toothed disc pressure ring support block spacers 711 are also nine, the number is not limited by this number. For example, by increasing or decreasing the size of the corresponding components, the number of gap-eliminating and anti-impact locking mechanisms 6 can be reduced or increased accordingly.

[0027] See you later Figure 1 and Figure 2 On the aforementioned lower moving plate 3, a set of worm gear reducer mounting screw holes 31 are provided at intervals at positions corresponding to the aforementioned output gear drive device 4; on the aforementioned upper moving plate 2, a worm gear shaft drive connection hole 22 is also provided at positions corresponding to the output gear drive device 4; the aforementioned output gear drive device 4 includes a motor 41, a worm gear reducer 42, and a worm gear reducer mounting base 43. The motor 41 is horizontally connected to the worm gear reducer 42, and the worm gear reducer 42, together with the motor 41, is fixed to the worm gear reducer mounting base 43, and the worm gear… The gearbox mounting base 43 is located below the aforementioned lower moving plate 3 and is fixed to the aforementioned set of worm gear reducer mounting base screw holes 31 by a set of spaced-apart worm gear reducer mounting base screws 431. The worm gear shaft 421 of the worm gear reducer 42 extends upward outside the worm gear reducer housing, and the upper end of the worm gear shaft 421 is connected to the aforementioned worm gear shaft transmission connection hole 22. A worm gear shaft gear 4211 is formed on the shaft body in the middle of the worm gear shaft 421 and around the worm gear shaft 421. The worm gear shaft gear 4211 and the aforementioned output gear 5 form an internal meshing transmission pair.

[0028] In this embodiment, the aforementioned motor is a servo motor with forward and reverse rotation functions, but a stepper motor can also be used.

[0029] See you later Figure 1 and 2 An output gear bushing support hole 32 is provided on the aforementioned lower moving plate 3 at a position corresponding to the aforementioned output gear 5 and worm gear shaft 421. An output gear rotating support sleeve 51 extends from the lower part of the aforementioned output gear 5. The output gear rotating support sleeve 51 is rotatably engaged with the output gear bushing support hole 32. A worm gear shaft gear insertion hole 52 is formed at the center position of the output gear 5. The worm gear shaft gear insertion hole 52 passes through the aforementioned output gear rotating support sleeve 51. An output gear internal gear ring 521 is formed longitudinally on the hole wall of the worm gear shaft gear insertion hole 52 and around the hole wall. The aforementioned worm gear shaft gear 4211 and the aforementioned output gear internal gear ring 521 form a meshing transmission pair in the aforementioned worm gear shaft gear insertion hole 52, that is, an internal meshing transmission pair is formed.

[0030] Lower moving plate 3 is provided with lower moving plate screw fixing holes 33 at intervals around its circumference, and lower moving plate fixing screws 331 are provided in the lower moving plate screw fixing holes 33. Upper moving plate 2 is provided with upper moving plate screw fixing holes 23 at the positions corresponding to the lower moving plate screw fixing holes 33. The lower moving plate 3 is fixed to the upper moving plate 2 at the position corresponding to the upper moving plate screw fixing holes 23 by the lower moving plate fixing screws 331 at the positions corresponding to the upper moving plate screw fixing holes 23. A lower moving plate wire passing hole 34 is provided on the lower moving plate body of the lower moving plate 3, penetrating the thickness direction of the lower moving plate body of the lower moving plate 3. Similarly, an upper moving plate wire passing hole 24 is provided on the upper moving plate 2 at the position corresponding to the lower moving plate wire passing hole 34, penetrating the thickness direction of the upper moving plate body of the upper moving plate 2. The circuit, which is electrically connected to the vehicle power supply, passes through the electrical controller installed on the car seat, and then through the support disk drive disk wire hole 82, the upper drive disk wire hole 24 and the lower drive disk wire hole 34 located in the center of the support disk drive disk 8, and is electrically connected to the aforementioned motor 41.

[0031] See you later Figure 2 And combined Figure 1 and Figure 3 On the aforementioned fixed plate 121, fixed plate fixing bracket screw holes 1211 are provided in pairs at intervals around the circumference of the fixed plate 121. The fixed plate fixing bracket screw holes 1211 are provided with screws for engaging with the screws. Figure 3 The plate fixing bracket 122 shown is fixed to one end of the plate fixing bracket 121 with a plate fixing bracket screw 12111, which is made of... Figure 3 The aforementioned plate fixing bracket 122, as shown, has a pair of plate fixing bracket screw holes 1221 at the end facing the plate 121 (i.e., the inward-facing end). The aforementioned plate fixing bracket screws 12111 pass sequentially from top to bottom through the plate fixing bracket screw holes 1211 and the plate fixing bracket screw holes 1221, thus fixing the plate 121 to the end of the plate fixing bracket 122 facing the plate 121. Figure 3 As shown, the center of the fixed plate bracket 122 is recessed downward to form a support plate support cavity 1222, and a base plate fixing connection hole 1223 is opened at the end of the fixed plate bracket 122 away from the fixed plate 121, that is, the outward end.

[0032] See you later Figure 1 and Figure 2On the edge of the upward-facing side surface of the aforementioned lower moving plate 3, a set of screw tail support cavities 35 are formed at intervals around the circumference of the lower moving plate 3. On the aforementioned upper moving plate 2, a set of drive plate connecting screw holes 25 are provided at intervals around the circumference of the upper moving plate body of the upper moving plate 2. The set of drive plate connecting screw holes 25 corresponds to the aforementioned set of screw tail support cavities 35, and a drive plate connecting screw 251 is provided at each position corresponding to the set of drive plate connecting screw holes 25. On the aforementioned support plate drive plate 8, a set of support plate drive plate screw holes 83 are provided at intervals corresponding to the positions of the drive plate connecting screw holes 25. The drive plate connecting screw 251 passes through the drive plate connecting screw holes 25 and the support plate drive plate screw holes 83 sequentially from the lower part of the upper moving plate 2 upwards and is locked by a locking nut 2511 screwed on the upper end of the drive plate connecting screw 251. The tail of the drive plate connecting screw 251 is supported on the aforementioned set of screw tail support cavities 35.

[0033] Depend on Figure 1 and Figure 2 As shown, a recessed platform 36 is formed on the upper surface of the aforementioned lower moving plate 3, in the region located or corresponding to the aforementioned output gear 5. The height difference between the surface of the recessed platform 36 and the top surface (i.e., the upper surface) of the lower moving plate 3 is exactly the thickness of the output gear 5. The aforementioned recessed platform 36 is essentially the region where the thickness of the lower moving plate 3 decreases.

[0034] Please see Figure 2 At the edge of the aforementioned gear plate holder 12 and around its circumference, there are gear plate holder fixing ears 123 extending at intervals. Gear plate holder fixing ears 123 have screw holes 1231 that correspond to and coincide with the screw holes (not shown) on the aforementioned fixed plate 121. Gear plate retaining ring 72 extends around its circumference and at positions corresponding to the aforementioned gear plate holder fixing ears 123 on the aforementioned gear plate retaining ring 7. Gear plate retaining ring fixing ears 72 are fitted with gear plate retaining ring fixing screws 7. 21. The toothed disc retaining ring fixing ear screw 721 is screwed into the toothed disc support retaining ear screw hole 1231 and the aforementioned fixed disc screw hole from top to bottom, extending to the bottom of the fixed disc 121 and locked by the toothed disc retaining ring fixing ear screw locking nut 7211 screwed on the lower end of the toothed disc retaining ring fixing ear screw 721; a downwardly recessed toothed disc receiving cavity 124 is formed on the inner side of the aforementioned toothed disc support 12 and around the toothed disc support 12. The aforementioned toothed disc 1 is set on the upward-facing side of the toothed disc support 12 at the position corresponding to the toothed disc receiving cavity 124. The central region of the toothed disc support 12 is formed as the toothed disc support center cavity 125.

[0035] Please see Figure 3 and Figure 4And combined Figure 1 and Figure 2 ,exist Figure 3 and Figure 4 The diagram shows a chassis 10 with a chassis cavity 101, comprising a structural system for a car seat rotation device. The central region of the chassis 10 forms the chassis cavity 101. A set (i.e., "two pairs") of chassis mounting ears 103 are formed on the chassis 10. This set of mounting ears 103 has four (but is not limited to four) and is spaced 90° apart from each other around the circumference of the chassis 10. In use, the mounting ears are fixed to a car seat slide rail or similar device by screws at positions corresponding to the mounting ear holes 1031 on the mounting ears 103. The diagram shows a rotating car seat system consisting of a turntable 20 and a support plate 9, which are vertically aligned and fixed to each other. The turntable 20 and the support plate 9 are positioned corresponding to the bottom wall of the chassis cavity 101 and form a rotating pair. A seat mounting plate 30, also part of the rotating car seat system, is shown. The seat mounting plate 30 is fixed to the turntable 20 above it, and in use, the car seat is fixed to the seat mounting plate 30.

[0036] Depend on Figure 3 As shown, the aforementioned support disk drive disk 8 is fixed to the aforementioned support disk 9 by a set of spaced drive disk free-standing support feet 81.

[0037] Depend on Figure 3As shown, a chassis fixing screw hole 102 is provided on the aforementioned chassis 10 at a position corresponding to the chassis fixing connection hole 1223. A chassis fixing screw 1021 is provided in the chassis fixing screw hole 102, and the chassis fixing screw 1021 fixes the chassis fixing bracket 122 to the chassis 10 at positions corresponding to the chassis fixing screw hole 102 and the chassis fixing connection hole 1223. A bearing cavity 1011 is formed on the cavity wall of the chassis cavity 101 of the aforementioned chassis 10 in the circumferential direction around the cavity wall. A support bearing 10111 is provided inside the bearing cavity 1011; a turntable bearing support mating surface 202 is formed on the outer wall of the turntable 20 in the circumferential direction; a support disc bearing support mating surface 91 is formed on the outer wall of the support disc 9 and around the circumference of the support disc 9; a turntable fixing edge 203 is formed at the bottom of the turntable bearing support mating surface 202 and around the bottom in the direction towards the turntable cavity 201 of the turntable 20; and a fixed edge 203 is formed on the fixed edge 203 and around the turntable cavity 201. The fixed edge 203 has circumferentially spaced turntable fixing holes 2031. On the upper surface of the support plate 9, and around its circumference, are spaced support plate fixing holes 93, corresponding to the turntable fixing holes 2031. The turntable fixing holes 2031 and the support plate fixing holes 93 are fixed together by screws. A set of seat mounting plate fixing connectors 204 extends outwardly from the upper edge of the turntable 20. Each of these seat mounting plate fixing connectors 204 has a... A seat mounting plate fixing screw hole 2041; a seat mounting plate screw hole 302 is provided on the aforementioned seat mounting plate 30 at the position corresponding to the seat mounting plate fixing screw hole 2041, and the seat mounting plate 30 is fixed to a set of seat mounting plate fixing connectors 204 by seat mounting plate screws 3021 at the position corresponding to the seat mounting plate fixing screw hole 2041. Seat fixing screw holes 303 are provided on the seat mounting plate 30 and around the seat mounting plate cavity 301 of the mounting plate 30 at intervals.

[0038] In this utility model, by Figure 3 The aforementioned set of plate fixing brackets 122 shown consists of four brackets, which are distributed at equal intervals. However, the number of plate fixing brackets 122 in this set is clearly not limited to the four shown in the figure. Any increase or decrease in the number of plate fixing brackets 122 should be considered as not departing from the technical scope disclosed in this utility model. Furthermore, by Figure 2 and Figure 3 The shape of the set of drive disc free-standing feet 81 shown in the diagram is roughly Z-shaped or zigzag-shaped.

[0039] Depend on Figure 2 and Figure 3 As shown, a set of drive disc free-standing support feet 81 face one end of the support disc drive disc 8. Figure 2 and Figure 3 The upper end of each of the indicated positions is fixed to the support disk drive disk 8 by screws through screw holes 811 corresponding to a pair of drive disk free-standing support feet 81 opened on the drive disk free-standing support feet 81. The end of the drive disk free-standing support foot 81 facing the aforementioned support disk 9 is... Figure 2 and Figure 3 The lower end of the position shown corresponds to a drive disk levitation support foot fixing screw hole 812 on the drive disk levitation support foot 81 and a support disk support foot fixing screw hole 92 on the aforementioned support disk 9. According to professional knowledge, the support disk support foot fixing screw hole 92 can actually be regarded as the support disk fixing hole 93, only they are different reference numerals because they need to be fixed by the drive disk levitation support foot 81.

[0040] Please see Figure 4 ,Should Figure 4 It indicated Figure 1 The completed assembly. Since the components have already been described above, they will not be repeated here.

[0041] Applicant combined Figures 1 to 4 The working principle of this utility model is described as follows: In use, the chassis 10 is fixed to the car seat slide rail via the chassis fixing lug holes 1031 on the aforementioned chassis fixing lugs 103 (four, i.e., two pairs), or fixed to the car floor or to a bracket (also called a "frame") set on the car floor via the chassis fixing lugs 103 and chassis mounting bolt holes 104 opened at other positions on the chassis 10; the car seat is fixed to the seat mounting plate 30. Furthermore, based on the above description, it can be definitively determined that the chassis 10, fixed plate 121, gear plate support 12, gear plate 1, and gear plate pressure ring 7 are static, i.e., do not rotate, while the turntable 20, support plate 9, seat mounting plate 30, upper moving plate 2, lower moving plate 3, output gear 5, and support plate drive plate 8 are rotating. The motor 41 is powered by the vehicle's power supply (electrically connected via wiring). The controller for electrically controlling the motor 41 is located in a suitable position on the car seat. It is called a suitable position because different vehicles have different choices of installation location. For example, some are located on the left side or side of the seat, while others are located on the front side of the seat, and so on.

[0042] When the passenger needs to adjust the seat angle, they simply operate the corresponding button on the aforementioned controller, such as a touch button or similar operating element such as a knob, push switch, etc., to activate the motor 41. The motor 41 drives the worm in the worm gear box 42, which in turn drives the worm wheel. The worm wheel shaft 421 drives the upper moving plate 2, and simultaneously, the worm wheel shaft gear 4211 on the worm wheel shaft 421 drives the output gear 5, causing the output gear 5 to move around the gear ring 111 inside the gear cavity 11 of the gear plate 1. During the aforementioned process, the upper and lower moving plates 2 and 3, as well as the support plate drive plate 8, move together. During the movement, i.e., rotation, of the support plate drive plate 8, a set of its drive plate lifting feet 81 drives the aforementioned support plate 9 to rotate. Since the support plate 9 and the turntable 20 are fixedly connected, the support plate 9 and the turntable 20 rotate together in a state where the support plate bearing support mating surface 91 and the turntable bearing support mating surface 202 form a rotating pair with the aforementioned support bearing 10111. Furthermore, since the seat mounting plate 30 is fixed to the seat mounting plate fixing screw hole 2041 of the seat mounting plate fixing connection seat 204 of the turntable 20 via seat mounting plate screws 3021, the turntable 20 drives the seat mounting plate 30 to rotate when it rotates. Also, since the car seat is fixed to the seat mounting plate 30, the seat mounting plate 30 rotates along with the car seat fixed to it. The direction of rotation of the car seat, whether clockwise or counterclockwise, depends on the forward or reverse rotation of the aforementioned motor 41. When the seat mounting plate 30 drives the car seat to rotate to the angle desired by the occupant, the operation of the aforementioned controller is released, thereby keeping the car seat at the desired angle position.

[0043] During the rotation of the upper moving plate 2, the upper moving plate rim 21 of the upper moving plate 2 pushes the roller in the rotation direction of a pair of rollers 62 in the structure system of a backlash elimination and anti-impact locking mechanism 6. The roller in the rotation direction squeezes or compresses the support block in the rotation direction of a pair of support blocks 63, so that the upper moving plate 2 has sufficient rotational clearance to rotate. When the upper moving plate 2 stops rotating, the roller in the rotation direction that was previously pushed by the upper moving plate 2 is ejected by the support block in the rotation direction, so that the roller in the rotation direction is reliably positioned between the upper moving plate rim 21 and the cavity wall of the toothed disc pressure ring cavity 71 of the toothed disc pressure ring 7 on the side facing the upper moving plate rim 21, thereby reliably locking the upper moving plate 2 and eliminating the gap. At the same time, due to the action of the toothed disc boss 61 of the structure system of the backlash elimination and anti-impact locking mechanism 6 directly formed on the upward-facing side of the toothed disc 1, as well as the combined action of the pair of rollers 62 and the pair of support blocks 63, the toothed disc 1 is kept in the locked position, ultimately achieving the purpose of locking and eliminating the gap of the car seat. In the locked state, there is not even the slightest wobbling. In summary, the upper moving plate 2 can rotate freely during rotation because its edge 21 contacts the roller 62. In the non-rotating state, the support block 63 is released, and the roller 62 reliably locks (positions) the edge 21 of the upper moving plate. As mentioned above, when the vehicle encounters severe bumps, impacts, emergency braking, emergency turns, or even collisions, the car seat will generate torque. When the torque is transmitted to the upper moving plate 2, it will not rotate because it is locked by the roller 62. The same applies to the gear plate 1, thus ensuring that the car seat does not rotate, fully demonstrating safety. Under the aforementioned factors, since the upper moving plate 2 will not rotate, it can effectively protect the worm gear shaft 421 of the output gear drive device 4, and ultimately protect the worm gear box 42 and the motor 41. Furthermore, the applicant's tests show that the rollers 62 of a set of backlash-eliminating and shock-resistant locking mechanisms 6, i.e., the nine pairs of rollers 62 of the nine sets or nine units of backlash-eliminating and shock-resistant locking mechanisms 6, can generate a clamping force greater than 3000 Newtons (3000N) on the upper moving plate 2 through their coordinated action. The applicant should note that if the aforementioned toothed plate boss 61 and the upward-facing surface of the toothed plate 1 are configured as separate structures, then they should be considered equivalent technical means.

[0044] In summary, the technical solution provided by this utility model makes up for the shortcomings of the prior art, successfully completes the invention task, and faithfully realizes the technical effects described by the applicant in the above technical effect column.

Claims

1. A backlash-free locking structure for a car seat rotating device, the car seat rotating device comprising a toothed disc (1), wherein an inner toothed ring (111) is formed on the toothed disc cavity (11) cavity wall and around the toothed disc cavity cavity wall; an upper moving disc (2) and a lower moving disc (3), the upper and lower moving discs (2, 3) being vertically and vertically corresponding to each other and fixed to each other at positions corresponding to the toothed disc cavity (11); an output gear drive device (4) and an output gear (5), the output gear drive device (4) being fixed to the lower moving disc (3) and forming an internal meshing gear transmission pair with the output gear (5) and being connected to the upper moving disc (2), while the output gear (5) forming a meshing pair with the inner toothed ring (111) of the toothed disc cavity; characterized in that: The toothed disc backlash-eliminating locking structure includes a set of backlash-eliminating and anti-impact locking mechanisms (6) and a toothed disc pressure ring (7). The set of backlash-eliminating and anti-impact locking mechanisms (6) are arranged at equal intervals around the circumference of the toothed disc (1) on the upward-facing side surface of the toothed disc (1). The toothed disc pressure ring (7) is sleeved outside the set of backlash-eliminating and anti-impact locking mechanisms (6). On the cavity wall of the toothed disc pressure ring cavity (71) of the toothed disc pressure ring (7) and towards the center of the toothed disc pressure ring cavity (71), there are a set of toothed disc pressure rings at equal intervals, the number of which is equal to the number of the set of backlash-eliminating and anti-impact locking mechanisms (6). The ring support block (711) is spaced with each of the two adjacent gap-free and impact-resistant locking mechanisms (6) in the set of gear disc pressure ring support block (711), and the space between each of the two adjacent gear disc pressure ring support block (711) forms a limiting cavity (7111). The upper moving disc edge (21) of the upper moving disc (2) and the inward side of the set of gap-free and impact-resistant locking mechanisms (6) form a gapless anti-impact rotating pair and restrict the set of gap-free and impact-resistant locking mechanisms (6) within the corresponding limiting cavity (7111).

2. The gear-disc backlash-eliminating locking structure of the automobile seat rotation device according to claim 1, characterized in that: The gear disc (1) is mounted on the gear disc tray (12) in the use state, and the gear disc tray (12) is supported on the fixed disc (121). The upper moving disc (2) is fixed to the support disc drive disc (8) in the use state, corresponding to the position below the support disc drive disc (8). The support disc drive disc (8) is fixed to the support disc (9) through a set of spaced support disc drive disc free-standing feet (81). The gear disc pressure ring (7) is fixed to both the gear disc tray (12) and the fixed disc (121).

3. The gear-disc backlash-eliminating locking structure of the automobile seat rotation device according to claim 1, characterized in that: Each of the set of backlash-eliminating and anti-impact locking mechanisms (6) includes a toothed disc boss (61), a pair of rollers (62), and a pair of support blocks (63). The toothed disc boss (61) is directly formed on the upward-facing side of the toothed disc (1). The pair of rollers (62) and the pair of support blocks (63) are placed on the upward-facing side of the toothed disc (1). One of the rollers (62) is located longitudinally between one side of the toothed disc boss (61) and one of the longitudinally positioned support blocks (63), while the other roller is located longitudinally between the other side of the toothed disc boss (61) and the other longitudinally positioned support block (63). The set of backlash-eliminating and anti-impact locking mechanisms (6) includes a toothed disc boss (61), a pair of rollers (62), a pair of rollers (62), a pair of rollers (62), a pair of rollers (63 ... The space between each pair of adjacent gapless anti-impact locking mechanisms in the locking mechanism (6) is configured as a support block partition cavity (64). The toothed disc pressure ring support block partition (711) is fitted into the support block partition cavity (64). The cavity shape of the limiting cavity (7111) is adapted to the shape formed by the toothed disc boss (61), a pair of rollers (62) and a pair of support blocks (63) arranged in an arc on the side of the toothed disc (1) facing upward. After the upper moving disc (2) is set in the toothed disc pressure ring cavity (71) of the toothed disc pressure ring (7), the upper moving disc edge (21) of the upper moving disc (2) and the side of the pair of rollers (62) facing the toothed disc pressure ring cavity (71) form a gapless anti-impact rotating pair.

4. The gear-disc backlash-eliminating locking structure of the automobile seat rotation device according to claim 3, characterized in that: The pair of support blocks (63) are made of rubber or nylon.

5. The gear-disc backlash-eliminating locking structure of the automobile seat rotation device according to claim 1, characterized in that: A set of worm gear reducer mounting screw holes (31) are provided on the lower moving plate (3) at intervals corresponding to the position of the output gear drive device (4); a worm gear shaft transmission connection hole (22) is provided on the upper moving plate (2) at the same position corresponding to the position of the output gear drive device (4); the output gear drive device (4) includes a motor (41), a worm gear reducer (42) and a worm gear reducer mounting base (43). The motor (41) is horizontally connected to the worm gear reducer (42) and is fixed to the worm gear reducer mounting base (43) by the worm gear reducer (42) together with the motor (41). The gearbox mounting base (43) is located below the lower moving plate (3) and is fixed to the set of worm gearbox mounting base fixing screw holes (31) by a set of spaced worm gearbox mounting base screws (431). The worm gear shaft (421) of the worm gearbox (42) extends upward to the outside of the worm gearbox housing, and the upper end of the worm gear shaft (421) is connected to the worm gear shaft transmission connection hole (22). A worm gear shaft gear (4211) is formed on the shaft body in the middle of the worm gear shaft (421) and around the worm gear shaft (421). The worm gear shaft gear (4211) and the output gear (5) form an internal meshing transmission pair.

6. The gear-disc backlash-eliminating locking structure of the automobile seat rotation device according to claim 5, characterized in that: An output gear bushing support hole (32) is provided on the lower moving plate (3) at a position corresponding to the output gear (5) and the worm gear shaft (421). An output gear rotating support sleeve (51) extends from the lower part of the output gear (5) and rotates with the output gear bushing support hole (32). A worm gear shaft probing hole (52) is formed at the center of the output gear (5) and passes through the output gear rotating support sleeve (51). An output gear internal gear ring (521) is formed longitudinally on the hole wall of the worm gear shaft probing hole (52) and around the hole wall. The worm gear shaft gear (4211) and the output gear internal gear ring (521) form a meshing transmission pair in the worm gear shaft probing hole (52).

7. The gear-disc backlash-eliminating locking structure of the automobile seat rotation device according to claim 1, characterized in that: Lower moving plate (3) is provided with lower moving plate screw fixing holes (33) at intervals around the circumference of lower moving plate (3), and lower moving plate fixing screws (331) are provided in the lower moving plate screw fixing holes (33); upper moving plate (23) is provided on the upper moving plate (2) at the position corresponding to the lower moving plate screw fixing holes (33), and the lower moving plate (3) is fixed to the upper moving plate (2) by the lower moving plate fixing screws (331) at the position corresponding to the upper moving plate screw fixing holes (23) at the position below the upper moving plate (2), and a lower moving plate wire hole (34) is provided on the lower moving plate body of the lower moving plate (3) through the thickness direction of the lower moving plate body of the lower moving plate (3), and an upper moving plate wire hole (24) is also provided on the upper moving plate (2) at the position corresponding to the lower moving plate wire hole (34) through the thickness direction of the upper moving plate body of the upper moving plate (2).

8. The gear-disc backlash-eliminating locking structure of the automobile seat rotation device according to claim 2, characterized in that: On the fixed plate (121), fixed plate fixing bracket screw holes (1211) are provided in pairs around the circumference of the fixed plate (121) for fixing to the end of the fixed plate fixing bracket (122) facing the fixed plate (121). Fixed plate fixing bracket screws (12111) are provided in the fixed plate fixing bracket screw holes (1211). A pair of fixed plate fixing bracket screw holes (1221) are provided at the end of the fixed plate fixing bracket (122) facing the fixed plate (121). The fixed plate fixing bracket screw (12111) passes through the fixed plate fixing bracket screw fixing hole (1211) and the fixed plate fixing bracket screw hole (1221) from top to bottom to fix the fixed plate (121) and the fixed plate fixing bracket (122) at the end facing the fixed plate (121). The middle part of the fixed plate fixing bracket (122) is recessed downward to form a support plate support cavity (1222). A chassis fixing connection hole (1223) is opened at the end of the fixed plate fixing bracket (122) away from the fixed plate (121).

9. The gear-disc backlash-eliminating locking structure of the automobile seat rotation device according to claim 2, characterized in that: A set of screw tail support cavities (35) is formed at the edge of the upward-facing side surface of the lower moving plate (3) and at intervals around the circumference of the lower moving plate (3); a set of drive plate connecting screw holes (25) is provided at intervals around the circumference of the upper moving plate body on the upper moving plate (2), the set of drive plate connecting screw holes (25) corresponds to the set of screw tail support cavities (35), and a drive plate connecting screw (251) is provided at each position corresponding to the set of drive plate connecting screw holes (25). On the support disk drive disk (8), a set of support disk drive disk screw holes (83) are provided at intervals corresponding to the drive disk connecting screw holes (25). The drive disk connecting screw (251) passes through the drive disk connecting screw holes (25) and the support disk drive disk screw holes (83) sequentially from the lower part of the upper drive disk (2) and is locked by the locking nut (2511) screwed on the upper end of the drive disk connecting screw (251). The tail of the drive disk connecting screw (251) is supported on the set of screw tail support cavities (35).

10. The gear-disc backlash-eliminating locking structure of the automobile seat rotating device according to claim 2, characterized in that: Gear plate holder fixing ears (123) extend at intervals along the edge of the gear plate holder (12) and around its circumference. Gear plate holder fixing ears (123) have screw holes (1231) that correspond to and coincide with the screw holes on the fixed plate (121). Gear plate pressure ring (7) has fixing ears (72) extending around its circumference and corresponding to the fixing ears (123). Gear plate pressure ring fixing ears (72) are fitted with screws (721). The toothed disc retaining ring fixing lug screw (721) is screwed into the toothed disc tray retaining lug screw hole (1231) and the fixed disc screw hole from top to bottom, extending to the bottom of the fixed disc (121) and locked by the toothed disc retaining ring fixing lug screw locking nut (7211) screwed on the lower end of the toothed disc retaining ring fixing lug screw (721); a downwardly recessed toothed disc receiving cavity (124) is formed on the inner side of the toothed disc tray (12) and around the toothed disc tray (12), the toothed disc (1) is set on the side of the toothed disc tray (12) facing upward at the position corresponding to the toothed disc receiving cavity (124), and the central area of ​​the toothed disc tray (12) is formed as the toothed disc tray central cavity (125).

Images