Concentric angle adjuster for adjusting leg support of automobile seat

Abstract

A concentric angle adjuster for adjusting an automobile seat leg support comprises a sleeve shell, a swing arm driving fluted disc, a fixed fluted disc, a driving gear and a cam, the sleeve shell forms a fluted disc containing cavity, a swing arm driving fluted disc cavity is formed in the right side of the swing arm driving fluted disc, and a swing arm driving fluted disc inner gear ring is arranged on the cavity wall of the swing arm driving fluted disc cavity. A swing arm driving fluted disc cam shaft head probing hole is formed in the center of the swing arm driving fluted disc, a fixed fluted disc cavity is formed in the left side of the fixed fluted disc, a fixed fluted disc inner gear ring is formed on the cavity wall of the fixed fluted disc cavity, and a fixed fluted disc cam shaft head probing hole is formed in the center of the fixed fluted disc. The driving gear is located in a cavity formed by a swing arm driving fluted disc cavity and a fixed fluted disc cavity, a cam matching cavity is formed in the center of the driving gear, a self-lubricating lining is arranged outside a cam, cam shaft heads extend on the left side face and the right side face of the cam, and transmission shaft transmission connecting holes are formed in the centers of the cam shaft heads. The utility model has the advantages of simplified structure, smooth operation effect, reduced volume, reduced weight and reduced cost.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of automobile seat accessories, and particularly relates to a concentric angle adjuster for adjusting an automobile seat leg support. BACKGROUND

[0002] The aforementioned leg support, also known as a leg rest, is usually used in high-end vehicles such as flagship sedans (e.g., Mercedes-Benz S-Class, BMW 7 Series, Audi A8, etc.), high-end MPVs (e.g., Toyota Alphard, Buick GL8 Avenir, Mercedes-Benz V-Class, etc.), performance cars / GT sports cars (e.g., Porsche, BMW 8 Series, etc.), high-energy high-end cars (e.g., Tesla, NIO ET7, Ideal, etc.), and high-end family sedans (e.g., Toyota Camry, Volkswagen Tengong, etc.).

[0003] Technical information about leg support adjustment devices can be found in a large number of published Chinese patent documents, such as CN203557986U (automobile seat leg support adjustment mechanism), CN212386376U (leg support adjustment mechanism of an automobile seat), CN210011655U (improved structure of an automobile leg support adjustment), CN111660902A (leg support adjustment structure of an automobile seat), and the like.

[0004] A typical example is "seat and leg support adjustment device thereof" disclosed in CN103209604A, which is proposed to address the deficiencies of CN101580034A (automobile seat leg support mechanism), CN201729085U (automobile electric seat leg support adjustment mechanism), and CN201729089U (automobile seat leg support adjustment mechanism) (paragraphs 0005-0006 of the specification) by optimizing the structure of the transmission mechanism to effectively control the required arrangement vacancy. The technical essence of this patent application is: "including an angle adjuster, a fixed part of the angle adjuster is used to connect with a fixed part of the seat, the angle adjuster is a self-locking angle adjuster; a power input rod of a linkage mechanism is connected with a rotating output part of the angle adjuster, a power output rod is used to connect with a leg support to adjust the posture of the leg support between the extended state and the retracted state". As can be seen, it is a beneficial approach to use a self-locking angle adjuster for adjusting the angle between the seat back and the seat of an automobile seat to adjust the extension and retraction of the leg support. Typical examples of the aforementioned self-locking angle adjuster include CN1149157C (adjusting assembly for a seat with adjustable backrest inclination, in particular for an automobile seat), CN100445126C (adjusting accessory for an automobile seat), WO2008 / 018650A1 (a seat reclining device), CN2907393Y (gear type seat angle stepless adjustment structure), CN101070055A (gear type seat angle stepless adjustment structure), and CN2479814Y (back gap elimination device). More typically, CN101941389A (seat angle adjuster and seat with the same).

[0005] As a manufacturer of simultaneously producing automobile seat angle adjuster and automobile seat leg rest and its adjusting device, the self-locking angle adjuster originally used for adjusting the angle of the chair back is converted to the structural system of the leg rest adjusting device, which has the advantages of component reuse and no need to develop a new path, saving development resources, development costs and effectively reducing the overall cost. However, there are some disadvantages in applying the self-locking angle adjuster to the structural system of the leg rest adjusting device: first, the mechanical structure is relatively complex due to the large number of components, and the large number of components also leads to a high failure rate. Because the self-locking angle adjuster needs additional self-locking mechanisms such as ratchet, spring, locking components, etc.; second, the self-locking angle adjuster is usually step adjustment (such as fixed position), which may cause a sense of jerkiness and relatively poor flexibility; third, the self-locking angle adjuster usually needs enough additional space, which increases the overall weight and volume; fourth, it is not economical and affects manufacturing efficiency, because the complex structure will increase the cost and affect the manufacturing efficiency; fifth, it is blind, because from the perspective of the application scene of the leg rest adjustment, high-strength locking is usually not needed, because the load-bearing requirement is significantly lower than that of the backrest angle adjuster, and more is the convenient fine-tuning function. Content of the utility model

[0006] The task of the utility model is to provide a concentric angle adjuster for automobile seat leg rest adjustment which helps to abandon locking components such as ratchet, spring, etc., significantly simplifies the structure, helps to meet the requirement of stepless continuous adjustment process without jerkiness, embodies smooth operation effect, is beneficial to significantly reduce the volume, avoids excessive space occupation and reduces the weight, is convenient to embody economy and improve manufacturing efficiency, reduces BOM cost, and helps to eliminate blindness and adapt to the application scene.

[0007] The utility model discloses a concentric angle adjuster for the adjustment of automobile seat leg support, which comprises a sleeve shell, a swing arm driving gear disc, a fixed gear disc, a driving gear and a cam. The sleeve shell is provided with a gear disc accommodating cavity. The right side of the swing arm driving gear disc is provided with a swing arm driving gear disc cavity. The swing arm driving gear disc cavity wall of the swing arm driving gear disc cavity is provided with a swing arm driving gear disc inner ring gear. A swing arm driving gear disc cam shaft head probe hole is formed in the center of the swing arm driving gear disc. The left side of the fixed gear disc is provided with a fixed gear disc cavity. The fixed gear disc cavity wall of the fixed gear disc cavity is provided with a fixed gear disc inner ring gear. A fixed gear disc cam shaft head probe hole is formed in the center of the fixed gear disc. The driving gear is located in the cavity formed by the swing arm driving gear disc cavity and the fixed gear disc cavity. The driving gear outer ring gear on the circumferential direction of the driving gear is engaged with the swing arm driving gear disc inner ring gear and the fixed gear disc inner ring gear. The central part of the driving gear is provided with a cam matching cavity. A self-lubricating bushing is arranged outside the cam. The self-lubricating bushing is rotatably arranged in the cam matching cavity together with the cam. The cam shaft head is extended on the left side and the right side of the cam. The cam shaft head on the left side of the cam is rotatably matched with the swing arm driving gear disc cam shaft head probe hole. The cam shaft head on the right side of the cam is rotatably matched with the fixed gear disc cam shaft head probe hole. The central part of the cam shaft head is provided with a transmission shaft transmission connection hole. After the swing arm driving gear disc and the fixed gear disc are matched face to face, the driving gear is arranged in the gear disc accommodating cavity of the sleeve shell together with the swing arm driving gear disc and the fixed gear disc. The cam shaft head is arranged outside the gear disc accommodating cavity.

[0008] In one specific embodiment of the utility model, a fixed gear disc positioning boss for fixing the fixed gear disc is formed on the right side of the fixed gear disc.

[0009] In another specific embodiment of the utility model, the number of teeth constituting the fixed gear disc inner ring gear is one or two more than the number of teeth constituting the swing arm driving gear disc inner ring gear.

[0010] In still another specific embodiment of the utility model, the inner diameter of the fixed gear disc cavity is smaller than the inner diameter of the swing arm driving gear disc cavity.

[0011] In yet another specific embodiment of the utility model, the cross section of the sleeve shell is in the shape of ┐.

[0012] In still another specific embodiment of the utility model, the transmission shaft transmission connection hole is a spline hole.

[0013] The technical advantages of the present invention are as follows: by changing the traditional mindset of existing technologies, a concentric angle adjuster that can be applied to the car seat leg support adjustment device is innovatively designed. This helps to eliminate locking components such as ratchet and spring in self-locking angle adjusters, thus significantly simplifying the structure; it helps to meet the requirement of stepless and continuous adjustment without any jerking, thus achieving a smooth operation; it helps to significantly reduce the size, thus achieving a miniature design and avoiding excessive space occupation and weight reduction; it facilitates economic efficiency and improves manufacturing efficiency, thus reducing BOM costs; and it helps to eliminate blindness, thus appropriately adapting to the application scenario and avoiding resource waste. Attached Figure Description

[0014] Figure 1 This is a structural diagram of an embodiment of the present utility model;

[0015] Figure 2 for Figure 1 A schematic diagram showing the left side of the fixed gear disc.

[0016] Figure 3 for Figure 1 A schematic diagram of the longitudinal section after assembly. Detailed Implementation

[0017] 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.

[0018] In the following description, all directional or positional concepts involving up, down, left, right, front, and back are based on the current position. Figure 1 The location and state are taken as a reference, and therefore should not be construed as a special limitation on the technical solution provided by this utility model.

[0019] Please see Figures 1 to 3The diagram shows a housing 1, a rocker arm drive gear 2, a fixed gear 3, a drive gear 4, and a cam 5. The housing 1 forms a gear accommodating cavity 11. A rocker arm drive gear cavity 21 is formed on the right side of the rocker arm drive gear 21. An inner gear ring 211 of the rocker arm drive gear 21 is formed on the cavity wall of the rocker arm drive gear cavity 21 and around the circumference of the cavity wall. A cam shaft head insertion hole 22 of the rocker arm drive gear 21 is opened at the center of the rocker arm drive gear 21. A fixed gear cavity 31 is formed on the left side of the fixed gear 3. An inner gear ring 311 of the fixed gear 31 is formed on the cavity wall of the fixed gear cavity 31 and around the circumference of the cavity wall. A cam shaft head insertion hole 32 of the fixed gear 31 is opened at the center of the fixed gear 31. The drive gear 4 is located in the cavity formed by the aforementioned rocker arm drive gear cavity 21 and fixed gear cavity 31, and is formed in the circumferential direction of the drive gear 4. The outer gear ring 41 of the drive gear on the outer wall meshes with the inner gear ring 211 of the aforementioned swing arm drive gear disk and the inner gear ring 311 of the fixed gear disk. The center of the drive gear 4 forms a cam engagement cavity 42. A self-lubricating bushing 6 is provided outside the cam 5. The self-lubricating bushing 6 and the cam 5 are rotatably arranged in the cam engagement cavity 42. A camshaft head 51 extends from the left side and the right side of the cam 5. The camshaft head 51 on the left side of the cam 5 is rotatably engaged with the aforementioned swing arm drive gear disk camshaft head protrusion hole 22, while the camshaft head 51 on the right side of the cam 5 is rotatably engaged with the aforementioned fixed gear disk camshaft head protrusion hole 32. A transmission shaft transmission connection hole 511 is formed in the center of the camshaft head 51. After the aforementioned swing arm drive gear disk 2 and the fixed gear disk 3 are engaged face to face, they are arranged in the gear disk receiving cavity 11 of the aforementioned housing 1 together with the aforementioned drive gear 4. The aforementioned camshaft head 51 protrudes out of the gear disk receiving cavity 11.

[0020] Based on common sense, it can be understood that in use, the aforementioned fixed gear plate 3 is fixed to the adjuster fixing plate, which in turn is fixed to the lower part of the car seat frame. Furthermore, since a pair of concentric adjusters of this invention are required in a car seat leg rest adjuster system, the aforementioned adjuster fixing plates are arranged facing each other, and these plates are fixed to the lower part of the car seat frame on opposite sides.

[0021] Depend on Figure 1 and Figure 3 As shown, a fixing toothed disc positioning boss 33 for fixing the fixing toothed disc 3 is formed on the right side surface of the aforementioned fixing toothed disc 3. The aforementioned fixing toothed disc positioning boss 33 is formed by transferring material to the right side through stamping the fixing toothed disc 3. In the use state, the fixing toothed disc 3 is fixed to the angle adjuster fixing plate mentioned above by the fixing toothed disc positioning boss 33, thereby making the fixing toothed disc 3 stationary.

[0022] In the embodiment, the number of the teeth constituting the inner ring gear 311 of the fixed gear plate is one more than the number of the teeth constituting the inner ring gear 211 of the swing arm driving gear plate. The inner diameter of the fixed gear plate cavity 31 is smaller than the inner diameter of the swing arm driving gear plate cavity 21. The applicant needs to point out that if the number of the teeth constituting the inner ring gear 311 of the fixed gear plate is designed to be two more than the number of the teeth constituting the inner ring gear 211 of the swing arm driving gear plate, it should be considered as an equivalent technical means and still belongs to the technical connotation scope disclosed in the utility model.

[0023] As can be known from the above description, the inner ring gear 311 of the fixed gear plate 3 is substantially equivalent to a static ring gear, and the static ring gear is equivalent to a fixed sun gear. The inner ring gear 211 of the swing arm driving gear plate cavity 21 is equivalent to a power output ring gear, and the driving gear 4 is like a planetary gear effect. Therefore, when the inner ring gear 311 of the fixed gear plate is fixed, the revolution and rotation of the driving gear 4 will drive the inner ring gear 211 of the swing arm driving gear plate to rotate.

[0024] In the embodiment, the cross-sectional shape of the sleeve 1 is in the shape of ┐, but the cross-sectional shape of the sleeve 1 can also be designed in the shape of C.

[0025] In the embodiment, the transmission shaft transmission connection hole 511 is a spline hole, so as to match with the spline shaft. Generally, the spline shaft is driven by an electric mechanism.

[0026] Since the structure and action mechanism of the automobile seat leg rest adjuster and the leg rest are well-known in the industry, and since the self-locking angle adjuster has been applied to the automobile seat leg rest adjuster, which can be seen in CN103029604A (the patent adopts a self-locking angle adjuster), the applicant will not expand the description of the action of the utility model applied to the automobile seat leg rest adjuster.

[0027] In summary, the technical scheme provided by the utility model makes up for the shortcomings in the prior art, successfully completes the invention task, and truly realizes the technical effects described by the applicant in the above technical effect column.

Claims

1. A concentric swivel for adjusting the leg rest of an automobile seat, characterized in that: The utility model relates to a swing arm driving mechanism, including sleeve shell (1), swing arm drive gear disc (2), fixed gear disc (3), drive gear (4) and cam (5), sleeve shell (1) constitutes and has gear disc accommodating cavity (11), the right side of swing arm drive gear disc (2) constitutes swing arm drive gear disc cavity (21), the swing arm drive gear disc cavity (21) swing arm drive gear disc cavity cavity wall and around swing arm drive gear disc cavity cavity wall's circumferential direction constitute swing arm drive gear disc inner gear ring (211), the central position of swing arm drive gear disc (2) is provided with swing arm drive gear disc cam shaft head to explore hole (22), the left side of fixed gear disc (3) constitutes fixed gear disc cavity (31), the fixed gear disc cavity (31) fixed gear disc cavity cavity wall and around fixed gear disc cavity cavity wall's circumferential direction constitute fixed gear disc inner gear ring (311), the central position of fixed gear disc (3) is provided with fixed gear disc cam shaft head to explore hole (32), drive gear (4) is located in the cavity that the swing arm drive gear disc cavity (21) and fixed gear disc cavity (31) constitute jointly, drive gear (4) the outer wall on the circumferential direction of constitution drive gear outer gear ring (41) with swing arm drive gear disc inner gear ring (211) and fixed gear disc inner gear ring (311) mesh, the central drive gear (4) constitutes cam cooperation cavity (42), the outer of cam (5) is provided with a self-lubricating bushing (6), by the self-lubricating bushing (6) together with cam (5) rotatably arranged in cam cooperation cavity (42), and each extends a cam shaft head (51) on the left side and the right side of cam (5), the cam shaft head (51) on the left side of cam (5) is rotatably matched with swing arm drive gear disc cam shaft head to explore hole (22), and the cam shaft head (51) on the right side of cam (5) is rotatably matched with fixed gear disc cam shaft head to explore hole (32), the central position of cam shaft head (51) constitutes a transmission shaft transmission connection hole (511), wherein, after the swing arm drive gear disc (2) and fixed gear disc (3) face-to-face cooperation together with drive gear (4) are arranged in the gear disc accommodating cavity (11) of sleeve shell (1), and the cam shaft head (51) explores the gear disc accommodating cavity (11).

2. The concentric swivel for adjustment of the leg rest of an automobile seat according to claim 1, characterized in that: The right side of the fixed gear disc (3) is provided with a fixed gear disc positioning boss (33) for fixing the fixed gear disc (3).

3. The concentric swivel for adjustment of the leg rest of an automobile seat according to claim 1, characterized in that: The number of teeth constituting the fixed gear disc inner gear ring (311) is one or two more than the number of teeth constituting the swing arm drive gear disc inner gear ring (211).

4. The concentric swivel for adjustment of the leg rest of an automobile seat according to claim 1, characterized in that: The inner diameter of the fixed gear disc cavity (31) is smaller than the inner diameter of the swing arm drive gear disc cavity (21).

5. The concentric angle adjuster for adjusting the leg rest of an automotive seat according to claim 1, wherein: The cross-sectional shape of the sleeve shell (1) is ┐-shaped.

6. The concentric swivel for adjustment of the leg rest of an automobile seat according to claim 1, characterized in that: The transmission shaft transmission connection hole (511) is a spline hole.

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