Seat backrest mounting structure and automobile with same

Abstract

The utility model relates to a seat backrest installation structure and an automobile with the seat backrest installation structure, the seat backrest installation structure is used for installing a backrest framework on an automobile body and comprises a limiting support used for being fixed on an installation support on the automobile body and a rotating shaft assembly used for being connected with the limiting support and the backrest framework. The rotating shaft assembly comprises a rotating shaft body and a connecting piece, the rotating shaft body comprises a first end and a second end which are opposite, a closed mounting hole is formed in the limiting support, the first end of the rotating shaft body is used for being connected with the backrest framework, and the second end of the rotating shaft body is used for penetrating through the mounting support and the mounting hole and is mounted on the limiting support through the connecting piece. The rotating shaft body penetrates into the closed mounting hole in the second limiting plate, and the second limiting plate is fixed on the mounting bracket, so that the rotating shaft body cannot move along the Z direction relative to the mounting bracket, and the seat backrest can be prevented from accidentally falling off from the mounting bracket to influence the normal use of the seat backrest.

Description

Technical Field

[0001] The utility model relates to the field of automobiles, in particular to a seat back mounting structure and an automobile having the same. Background Art

[0002] To enhance storage flexibility and ease of use, most cars incorporate foldable rear seatbacks into their designs. This allows for normal use when not needed, and can be folded down when needed to increase rear seat space. However, in practice, when the rear seatbacks are adjusted to certain angles, the lack of a Z-axis limiter between the seatback and the vehicle body can cause the seatbacks to accidentally detach from the skeletal connection. This not only affects the normal use of the seatbacks, but also poses a potential safety hazard and increases maintenance costs. Utility Model Content

[0003] In view of this, an object of the present invention is to provide a seat back mounting structure capable of preventing a seat back from accidentally falling out of a frame connection structure and a vehicle having the same.

[0004] To achieve the above-mentioned purpose, the present invention proposes a seat back mounting structure for mounting a backrest frame on a vehicle body, wherein the seat back mounting structure includes a limiting bracket for fixing to a mounting bracket on a vehicle body, and a rotating shaft assembly for connecting to the limiting bracket and the backrest frame; the rotating shaft assembly includes a rotating shaft body and a connecting piece, the rotating shaft body includes a first end and a second end relative to each other, a closed mounting hole is provided on the limiting bracket, the first end of the rotating shaft body is used to connect to the backrest frame, the second end of the rotating shaft body is used to pass through the mounting bracket and the mounting hole, and is mounted on the limiting bracket using the connecting piece.

[0005] Furthermore, the limiting bracket includes a first limiting plate and a second limiting plate, the first limiting plate is used to be fixedly connected to the top of the mounting bracket, and the second limiting plate is provided with the mounting hole.

[0006] The seat back mounting structure of the present invention further comprises bolts and nuts, and the first limiting plate can be fixed to the top of the mounting bracket by means of the bolts and the nuts.

[0007] Furthermore, the mounting bracket is provided with a first mounting groove and a second mounting groove, the second mounting groove is located below the first mounting groove and is connected to the first mounting groove, the limiting bracket and the rotating shaft body enter the mounting bracket through the first mounting groove, and the rotating shaft body is stuck in the second mounting groove from top to bottom.

[0008] Optionally, the rotating shaft assembly includes a limit spring, which is sleeved on the rotating shaft body and is used to be arranged between the mounting bracket and the backrest frame to limit the Y-direction distance between the backrest frame and the mounting bracket.

[0009] Optionally, the rotating shaft assembly also includes a limit ring, at least a portion of which is used to be clamped between the mounting bracket and the limit spring, a tubular portion is provided in the middle of the limit ring, a plurality of support portions are provided on the inner surface of the tubular portion, and the rotating shaft body penetrates into the tubular portion and contacts the support portions.

[0010] Optionally, a recessed portion is provided on the mounting bracket, and the position-limiting retaining ring includes a first abutting portion for abutting against a side surface of the mounting bracket, and a second abutting portion for abutting against a bottom of the recessed portion.

[0011] Optionally, a flange portion extending radially outward is formed on the outside of the tubular portion, an annular recess is formed between the flange portion and the first abutting portion, and a second reinforcing rib is provided in the annular recess.

[0012] Optionally, the rotating shaft assembly further includes a bushing, which is at least partially embedded in the mounting hole to prevent the rotating shaft body from contacting the limiting bracket.

[0013] The utility model also provides an automobile, comprising a backrest frame, a vehicle body and the seat backrest mounting structure, wherein the backrest frame is mounted on the vehicle body through the seat backrest mounting structure.

[0014] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0015] In the present invention, since the rotating shaft body passes through the closed mounting hole on the second limiting plate, and since the second limiting plate is fixed to the mounting bracket, the rotating shaft body cannot move along the Z direction relative to the mounting bracket, thereby preventing the seat back from accidentally falling out of the mounting bracket and affecting the normal use of the seat back. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a schematic diagram of the assembly of the seat back mounting structure of the present invention.

[0018] Figure 2 This is an exploded view of the seat back mounting structure of the present invention.

[0019] Figure 3 It is a structural schematic diagram of the seat back mounting structure of the present invention.

[0020] Figure 4 It is a cross-sectional view of the seat back mounting structure of the present invention.

[0021] Figure 5 This is a schematic structural diagram of the limit retaining ring of the present utility model.

[0022] Figure 6 This is a structural schematic diagram of the limit retaining ring of the utility model from another perspective.

[0023] In the picture:

[0024] 11-backrest frame; 12-backrest bracket; 2-body;

[0025] 3-mounting bracket; 31-first mounting slot; 32-second mounting slot; 33-recessed portion; 34-first mounting plate; 35-second mounting plate; 36-second fixing hole; 41-bolt; 42-nut;

[0026] 5-limiting bracket; 51-first limiting plate; 52-second limiting plate; 53-connecting plate; 54-first reinforcing rib; 511-first fixing hole; 521-mounting hole;

[0027] 6-rotating shaft assembly; 61-rotating shaft body; 611-limiting flange; 62-connecting piece; 63-limiting spring; 64-limiting retaining ring; 641-first abutting portion; 642-second abutting portion; 643-tubular portion; 644-flange portion; 645-second reinforcing rib; 646-third reinforcing rib; 647-supporting portion; 65-washer; 66-bushing. DETAILED DESCRIPTION

[0028] Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the description of the present invention, all other embodiments derived by persons of ordinary skill in the art without inventive effort are also within the scope of protection of the present invention.

[0029] The orientations or positional relationships indicated by terms such as "upper", "lower", "top", "bottom", "inside", and "outside" are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of description and simplified description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they should not be understood as limitations on the utility model.

[0030] The terms "first," "second," and the like are merely used to distinguish between elements of similar nature and do not indicate or imply relative importance or a particular order.

[0031] The terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of elements other than the listed elements and may also include additional elements not specifically listed.

[0032] like Figure 1 As shown, the present invention provides an automobile comprising a backrest frame 11, a vehicle body 2, and a seat back mounting structure. The backrest frame 11 is mounted to the vehicle body 2, such as on a side panel, via the seat back mounting structure and is rotatable relative to the vehicle body 2. For ease of description, the X direction is the length of the vehicle, the Y direction is the width of the vehicle, and the Z direction is the height of the vehicle.

[0033] The seat back mounting structure provided by the present invention includes a mounting bracket 3, a limiting bracket 5, a rotating shaft assembly 6 and a backrest bracket 12. The mounting bracket 3 is fixedly mounted on the vehicle body 2. The backrest bracket 12 is fixedly connected to the backrest frame 11. The backrest bracket 12 is connected to the mounting bracket 3 through the rotating shaft assembly 6 and the limiting bracket 5, and the backrest frame 11 is installed on the vehicle body 2.

[0034] Optionally, the mounting bracket 3 is fixedly connected to the vehicle body 2 by welding or riveting, and the backrest bracket 12 is located on the side of the bottom of the backrest frame 11 close to the vehicle body 2, and is fixedly connected to the backrest frame 11 by welding or riveting, or the backrest bracket 12 is integrally formed with the backrest frame 11. The limiting bracket 5 is fixedly connected to the mounting bracket 3, and the two opposite ends of the rotating shaft assembly 6 pass through the backrest bracket 12 and the limiting bracket 5 respectively, and at least one of the two opposite ends of the rotating shaft assembly 6 can rotate relative to the corresponding backrest bracket 12 and the limiting bracket 5, so that the backrest frame 11 can rotate relative to the mounting bracket 3 and the vehicle body 2. Specifically, the first end of the rotating shaft assembly 6 can be fixedly connected to the backrest bracket 12 by welding, and the second end of the rotating shaft assembly 6 can pass through the mounting bracket 3 and the limiting bracket 5 and be connected to the limiting bracket 5, so that the rotating shaft assembly 6 can rotate relative to the mounting bracket 3. Alternatively, the first end of the rotating shaft assembly 6 passes through the backrest bracket 12 and is connected to the backrest bracket 12, so that the backrest bracket 12 and the rotating shaft assembly 6 can also rotate relative to each other. In this embodiment, the first end of the rotating shaft assembly 6 is welded and fixed to the backrest bracket 12 , and the second end of the rotating shaft assembly 6 passes through the mounting bracket 3 and the limiting bracket 5 and is connected to the limiting bracket 5 .

[0035] See also Figures 2 to 4 The rotating shaft assembly 6 is connected to the limiting bracket 5 and the backrest bracket 12. The limiting bracket 5 is used to limit the position of the rotating shaft assembly 6 relative to the mounting bracket 3 along the Z direction, preventing the rotating shaft assembly 6 from detaching from the mounting bracket 3 along the Z direction, thereby avoiding failure of the connection between the backrest frame 11 and the vehicle body 2 in the Z direction and improving the connection stability.

[0036] In some embodiments, the limiting bracket 5 is an integral stamping part, which is roughly L-shaped and includes a first limiting plate 51 and a second limiting plate 52. The first limiting plate 51 is used to be fixedly connected to the mounting bracket 3, and the second limiting plate 52 is used to be connected to the rotating shaft assembly 6. The first limiting plate 51 is formed by bending one end of the second limiting plate 52 and extending it outward, and the first limiting plate 51 and the second limiting plate 52 are roughly perpendicular. A connecting plate 53 is provided between the first limiting plate 51 and the second limiting plate 52, and a certain angle is formed between the connecting plate 53 and the first limiting plate 51 and the second limiting plate 52. In this way, a transition structure similar to a chamfer is formed between the first limiting plate 51 and the second limiting plate 52, so that the connection part of the first limiting plate 51 and the second limiting plate 52 is not easily deformed. Optionally, a first reinforcing rib 54 is provided in the middle of the connecting plate 53, extending from the end close to the first limiting plate 51 to the end close to the second limiting plate 52, so as to enhance the connection strength between the first limiting plate 51 and the second limiting plate 52.

[0037] The limiting bracket 5 is fixedly connected to the mounting bracket 3 by a bolt 41 and a nut 42. Specifically, one of the bolt 41 and the nut 42 is fixedly connected to the mounting bracket 3. In one example, the nut 42 is fixedly connected to the side of the top of the mounting bracket 3 away from the first limiting plate 51 by projection welding or other connection methods. The first limiting plate 51 and the mounting bracket 3 are respectively provided with a first fixing hole 511 and a second fixing hole 36 for the bolt 41 to pass through. The bolt 41 passes through the first limiting plate 51 and the mounting bracket 3 in sequence and is threadedly connected with the nut 42 to fix the limiting bracket 5 to the mounting bracket 3. In another example, the bolt 41 is fixedly connected to the side of the top of the mounting bracket 3 away from the first limiting plate 51 by projection welding or other connection methods, and the bolt 41 passes through the mounting bracket 3. During installation, the first limiting plate 51 is placed on the mounting bracket 3 and the bolt 41 is passed through the first limiting plate 51. Then, the nut 42 is screwed onto the bolt 41 to fix the limiting bracket 5 to the mounting bracket 3.

[0038] Furthermore, the shaft assembly 6 includes a shaft body 61 and a connector 62. The second limiting plate 52 is provided with a mounting hole 521 for the shaft body 61 to pass through. The mounting hole 521 is a closed mounting hole, such as a round hole, a square hole, a hexagonal hole, etc. The mounting hole 521 in this embodiment is a round hole. One end of the shaft body 61 is connected to the backrest bracket 12, and the other end is fixedly connected to the connector 62 after passing through the mounting hole 521, so that the end of the shaft assembly 6 is mounted on the limiting bracket 5. Optionally, the shaft body 61 and the connector 62 are close to each other at one end, one of which is provided with an internal thread and the other is provided with an external thread, and are fixedly connected to each other by a threaded connection. Preferably, a threaded hole is provided on the shaft body 61, and the connector 62 is a bolt.

[0039] In some embodiments, the rotating shaft assembly 6 also includes a limit spring 63, which is mounted on the rotating shaft body 61 and located between the mounting bracket 3 and the backrest bracket 12. In one example, the two ends of the limit spring 63 are respectively against the mounting bracket 3 and the backrest bracket 12, and are used to limit the Y-direction distance between the backrest bracket 12 and the mounting bracket 3 to prevent friction between the two due to contact.

[0040] In some embodiments, the shaft assembly 6 further includes a stop ring 64, which is sleeved on the shaft body 61 and a portion of which is accommodated in the recess 33 provided on the mounting bracket 3. Figure 5 and Figure 6In one embodiment, the limiting retaining ring 64 includes a tubular portion 643, a flange portion 644, a first abutting portion 641 and a second abutting portion 642. The tubular portion 643 is located in the middle of the limiting retaining ring 64, and a strip-shaped support portion 647 is provided inside the tubular portion 643. The support portion 647 is arranged along the circumferential direction of the tubular portion 643 and is used to contact the rotating shaft body 61 to reduce the friction between the rotating shaft body 61 and the tubular portion 643. The flange portion 644 extends radially outward from the outer circumferential surface of the tubular portion 643 and is used to abut against the limiting spring 63 to provide stable support for the limiting spring 63. The first abutting portion 641 is provided on the outside of the flange portion 644 and is used to abut against the mounting bracket 3 so that the limiting retaining ring 64 can be firmly installed on the mounting bracket 3. A plurality of second reinforcing ribs 645 are provided in the annular recess between the first abutting portion 641 and the flange portion 644. A plurality of third reinforcing ribs 646 are also provided on the side of the first abutting portion 641 and the flange portion 644 near the mounting bracket 3. The second reinforcing ribs 645 and the third reinforcing ribs 646 are used to increase the connection strength between the first abutting portion 641 and the flange portion 644. The second abutting portion 642 extends outward from the side of the first abutting portion 641 and the flange portion 644 near the mounting bracket 3. Its shape is substantially the same as that of the recessed portion 33 on the mounting bracket 3, forming a stable support with the bottom of the recessed portion 33, further enhancing the secure fit between the retaining ring 64 and the mounting bracket 3.

[0041] Optionally, the retaining ring 64 is made of a material with low friction noise and good wear resistance, such as plastic. The setting of the retaining ring 64 can prevent the shaft body 61 from directly contacting the mounting bracket 3, and prevent abnormal noise caused by friction between the shaft body 61 and the metal mounting bracket 3 when rotating.

[0042] See also Figure 2 and Figure 4 In some embodiments, the mounting bracket 3 includes at least an integrally formed first mounting plate 34 and a second mounting plate 35. The first mounting plate 34 is cage-shaped and surrounds the edge of the second mounting plate 35 to increase the strength of the entire mounting bracket 3. A space is formed within the mounting bracket 3 to accommodate the end of the rotating shaft body 61 and the connector 62. The first mounting plate 34 is secured to the vehicle body 2 by welding to prevent the entire seat back mounting structure from being detached from the vehicle body 2. A through-going first mounting slot 31 is defined in the first mounting plate 34 to accommodate the position limiting bracket 5 and the connector 62. The second mounting plate 35 is provided with a second mounting slot 32, which is located below and communicates with the first mounting slot 31.

[0043] Specifically, the second mounting groove 32 includes an arc portion at its bottom and a straight portion between the arc portion and the first mounting groove 31. The arc portion defines the position of the shaft body 61, preventing it from moving in the X-direction. The straight portion serves as a guide, facilitating the sliding of the shaft body 61 into the arc portion, and also acts as a transition reinforcement, preventing the connection between the arc portion and the first mounting groove 31 from being weakened by a direct connection. Furthermore, the width of the straight portion is smaller than the diameter of the arc portion. This allows the straight portion to also function as a stop, preventing the retaining ring 64 from moving upward under external forces in the Z-direction. A recessed portion 33 is provided around the periphery of the second mounting groove 32. The depth of each portion of the bottom surface of the recessed portion 33 relative to the second mounting plate 35 gradually increases as it moves away from the second mounting plate 35, while the diameter of each portion of the bottom surface of the recessed portion 33 gradually decreases as it moves away from the second mounting plate 35. This structure facilitates limiting the position of the limiting ring 64 relative to the mounting bracket 3 , thereby limiting the position of the rotating shaft assembly 6 relative to the mounting bracket 3 along the Z direction, and further preventing the rotating shaft assembly 6 from detaching from the mounting bracket 3 .

[0044] Optionally, the shaft assembly 6 further includes a washer 65 and a bushing 66. A stop flange 611 extending radially outward from the outer surface of the shaft body 61 is provided near the first end of the shaft body 61. The washer 65 is sleeved onto the shaft body 61 and sandwiched between the stop spring 63 and the stop flange 611 to increase the contact area with the stop spring 63 and prevent the end of the stop spring 63 from deforming and becoming stuck on the outside of the stop flange 611, thereby causing structural failure and friction noise. The bushing 66 is at least partially embedded in the mounting hole 521 to prevent direct contact between the shaft body 61 and the second stop plate 52, thereby preventing abnormal noise caused by the rotation of the shaft body 61 when adjusting the angle of the backrest frame 11.

[0045] When assembling the seat back mounting structure of the present invention, first, the washer 65, the limit spring 63 and the limit retaining ring 64 are sequentially sleeved on the shaft body 61; then, the bushing 66 is clamped into the mounting hole 521 of the second limit plate 52, and the shaft body 61 is passed through the second limit plate 52, and then the shaft body 61 is fixed to the second limit plate 52 using the connecting piece 62; then, the shaft assembly 6 and the limit bracket 5 are placed together from the first mounting groove 31 into the mounting bracket 3, and the shaft body 61 is fixed to the second limit plate 52. When sliding into the second mounting groove 32, the limit ring 64 cooperates well with the recessed portion 33 of the mounting bracket 3; then, the limit bracket 5 is fixed to the mounting bracket 3 to complete the assembly of the rotating shaft assembly 6 and the mounting bracket 3; then, force is applied to the rotating shaft body 61 to compress the limit spring 63 so that the second end of the rotating shaft body 61 is inserted into the through hole provided on the backrest bracket 12, and then the rotating shaft body 61 and the backrest bracket 12 are welded and fixed, finally completing the fixed connection between the backrest frame 11 and the vehicle body 2.

[0046] When the rear seat backrest needs to be folded down, the backrest frame 11 and backrest bracket 12 rotate, driving the shaft body 61 to rotate. Because the shaft body 61 penetrates the enclosed mounting hole 521 in the second limit plate 52, and because the second limit plate 52 is fixed to the mounting bracket 3, the shaft body 61 cannot move in the Z direction relative to the mounting bracket 3, thus preventing the seat backrest from accidentally falling out of the mounting bracket 3 and affecting its normal use. The present invention also reduces friction during the rotation of the shaft body 61 by providing a limit ring 64, bushing 66, etc., thereby extending the service life of the seat back mounting structure and reducing friction noise.

[0047] The above is only a specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any changes or replacements that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed in the present invention should be covered by the protection scope of the present invention.

Claims

1. A seat back mounting structure for mounting a seat back frame (11) on a vehicle body (2), characterized in that: The seat back mounting structure comprises a limiting bracket (5) for fixing on a mounting bracket (3) on a vehicle body (2), and a rotating shaft assembly (6) for connecting with the limiting bracket (5) and the backrest frame (11); the rotating shaft assembly (6) comprises a rotating shaft body (61) and a connecting member (62), the rotating shaft body (61) comprises a first end and a second end opposite to each other, a closed mounting hole (521) is provided on the limiting bracket (5), the first end of the rotating shaft body (61) is used to connect with the backrest frame (11), the second end of the rotating shaft body (61) is used to pass through the mounting bracket (3) and the mounting hole (521), and is mounted on the limiting bracket (5) by using the connecting member (62).

2. The seat back mounting structure according to claim 1, characterized in that: The limiting bracket (5) comprises a first limiting plate (51) and a second limiting plate (52); the first limiting plate (51) is used for fixed connection with the top of the mounting bracket (3); and the second limiting plate (52) is provided with the mounting hole (521).

3. The seat back mounting structure according to claim 2, characterized in that: It also includes a bolt (41) and a nut (42), and the first limiting plate (51) can be fixed to the top of the mounting bracket (3) through the bolt (41) and the nut (42).

4. The seat back mounting structure according to claim 1, characterized in that: The mounting bracket (3) is provided with a first mounting groove (31) and a second mounting groove (32), the second mounting groove (32) is located below the first mounting groove (31) and is communicated with the first mounting groove (31), the limiting bracket (5) and the rotating shaft body (61) enter the mounting bracket (3) through the first mounting groove (31), and the rotating shaft body (61) is clamped into the second mounting groove (32) from top to bottom.

5. The seat back mounting structure according to claim 1, characterized in that: The rotating shaft assembly (6) includes a limit spring (63), which is sleeved on the rotating shaft body (61) and is used to be arranged between the mounting bracket (3) and the backrest frame (11) to limit the Y-direction distance between the backrest frame (11) and the mounting bracket (3).

6. The seat back mounting structure according to claim 5, characterized in that: The rotating shaft assembly (6) also includes a limit ring (64), at least a portion of which is used to be clamped between the mounting bracket (3) and the limit spring (63), a tubular portion (643) is provided in the middle of the limit ring (64), and a plurality of supporting portions (647) are provided on the inner surface of the tubular portion (643), and the rotating shaft body (61) penetrates into the tubular portion (643) and contacts the supporting portions (647).

7. The seat back mounting structure according to claim 6, characterized in that: The mounting bracket (3) is provided with a recessed portion (33), and the position-limiting retaining ring (64) comprises a first abutting portion (641) for abutting against the side surface of the mounting bracket (3), and a second abutting portion (642) for abutting against the bottom of the recessed portion (33).

8. The seat back mounting structure according to claim 7, characterized in that: A flange portion (644) extending radially outward is formed on the outside of the tubular portion (643), an annular recess is formed between the flange portion (644) and the first abutting portion (641), and a second reinforcing rib (645) is provided in the annular recess.

9. The seat back mounting structure according to claim 1, characterized in that: The rotating shaft assembly (6) further includes a bushing (66), wherein the bushing (66) is at least partially embedded in the mounting hole (521) and is used to prevent the rotating shaft body (61) from contacting the limiting bracket (5).

10. An automobile, characterized in that: It comprises a backrest frame (11), a vehicle body (2) and a seat backrest mounting structure according to any one of claims 1 to 9, wherein the backrest frame (11) is mounted on the vehicle body (2) through the seat backrest mounting structure.

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