Compact type seat frame independent forward-moving driving structure

Abstract

The utility model discloses a compact type seat frame independent forward-moving driving structure which comprises a support assembly, a seat cushion framework is arranged above the support assembly, a first connecting rod is arranged between the front portion of the seat cushion framework and the front end of the support assembly, and the two ends of the first connecting rod are hinged to the seat cushion framework and the support assembly respectively. A sliding groove extending in the length direction is formed in the rear portion of the support assembly, and the rear end of the seat cushion framework is connected into the sliding groove in a front-back sliding mode. A telescopic driving device is arranged between the first connecting rod and the seat cushion framework and comprises a motor, a lead screw driven by the motor to rotate and a nut sleeve arranged on the lead screw in a threaded sleeving mode, a machine base of the motor is rotatably assembled on the first connecting rod, and a connecting part is fixedly assembled on the nut sleeve. One end of the connecting part away from the nut sleeve is rotationally connected with the rear end of the cushion framework; the motor drives the lead screw to rotate and can pull the rear portion of the seat cushion framework to move forwards relative to the sliding groove through the connecting part. The utility model has the advantages of compact layout and small occupied space.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle seats, in particular to a compact seat frame independent forward movement driving structure. Background Art

[0002] At present, some front seats have the function of tilting forward, that is, the backrest can be adjusted forward in angle so that the rear passengers have better foot space and comfortable support for their legs during rest. In the existing seat structure, the backrest of the front seat is usually rotatably installed at the rear end of the seat cushion frame. When the backrest rotates forward, the seat cushion remains stationary relative to the backrest, and the backrest is restricted by the interference of the seat cushion and cannot be tilted forward flat at a large angle, resulting in limited activity space for the rear passengers and the legs of the passengers cannot obtain more comfortable support.

[0003] To solve the above technical problems, some seats adopt a separated setting of the seat cushion and the backrest. By moving the seat cushion forward alone, the folding space under the backrest is vacated so that the backrest can be tilted forward flat at a large angle. However, in the prior art, the additional transmission mechanism components for endowing the seat cushion with the function of moving forward alone occupy a large space and have a complex structure. Therefore, further optimization is required in the structural design. Summary of the Utility Model

[0004] In view of this, the utility model provides a compact seat frame independent forward movement driving structure, which has the advantages of compact layout and small occupied space.

[0005] To achieve the above object, the technical solution of the utility model is as follows:

[0006] A compact seat frame independent forward movement driving structure, characterized in that it includes a bracket assembly for mounting on a slide rail, a seat cushion skeleton is arranged above the bracket assembly, a first connecting rod is arranged between the front part of the seat cushion skeleton and the front end of the bracket assembly, and both ends of the first connecting rod are respectively hinged to the seat cushion skeleton and the bracket assembly. A chute extending along the length direction is arranged at the rear part of the bracket assembly, and the rear end of the seat cushion skeleton is slidably connected in the chute;

[0007] An expansion and contraction driving device is arranged between the first connecting rod and the seat cushion skeleton. The expansion and contraction driving device includes a motor, a lead screw driven by the motor to rotate, and a nut sleeve threadedly sleeved on the lead screw. The base of the motor is rotatably assembled on the first connecting rod, a connecting part is fixedly assembled on the nut sleeve, and one end of the connecting part away from the nut sleeve is rotatably connected to the rear end of the seat cushion skeleton;

[0008] When the motor drives the lead screw to rotate, the rear part of the seat cushion skeleton can be pulled to move forward relative to the chute through the connecting part.

[0009] With the above structure, the motor drives the nut sleeve to make a linear motion forward along the length direction of the screw rod, driving the rear end of the seat cushion frame to move forward along the slide groove. Since the two ends of the first connecting rod are respectively hinged to the seat cushion frame and the bracket assembly, during the process of the rear end of the seat cushion frame moving forward, the first connecting rod can be driven to rotate around the hinge center between it and the bracket assembly, thereby driving the front part of the seat cushion frame to move forward. During the process of the seat cushion frame moving forward, since the motor base is rotationally assembled on the first connecting rod, the forward rotation of the first connecting rod can drive the telescopic drive device to move forward as a whole.

[0010] Preferably, the bracket assembly includes a transition frame for fixedly mounting on the slide rail, the end of the first connecting rod away from the seat cushion frame is hinged at the front end of the transition frame, the slide groove is arranged on the transition frame, and the rear end of the transition frame is provided with an upwardly extending adapter component, which is used for rotating and assembling the backrest frame.

[0011] Preferably, a second connecting rod is provided between the rear end of the seat cushion frame and the rear part of the bracket assembly, and one end of the second connecting rod away from the seat cushion frame is rotatably connected to the connecting part through a pin shaft, and the pin shaft is supported in the slide groove so as to slide forward and backward.

[0012] Preferably, it also includes slide rails, which include two groups of lower rails arranged in parallel and symmetrically, and two groups of upper rails respectively slidably connected to the two groups of lower rails, a crossbeam is fixedly supported between the two groups of upper rails, and the number of transition frames is two groups, and the two groups of transition frames are respectively fixedly assembled on the two groups of upper rails.

[0013] Preferably, two groups of the first connecting rods and the second connecting rods are provided, one end of the two groups of the first connecting rods are respectively hinged to the two sides of the front end of the seat cushion frame, the other ends of the two groups of the first connecting rods are respectively hinged to the corresponding transition frames, and a first cross bar is rotatably connected between the upper parts of the two groups of the first connecting rods.

[0014] Preferably, two groups of the second connecting rods are arranged on both sides of the rear end of the seat cushion frame, and the ends of the two groups of the second connecting rods away from the seat cushion frame are supported in corresponding slide grooves by two pins respectively, and a second cross bar is placed horizontally between the two pins.

[0015] Preferably, the telescopic drive device is arranged inside one of the transition frames, and the base of the motor is rotatably connected to the first crossbar via an adapter.

[0016] Preferably, the slide groove is constructed into a wave-shaped structure, which includes an inclined section, a first transition section, a first horizontal section, a second transition section, and a second horizontal section connected in sequence from front to back, and the height of the front end of the inclined section is lower than the height of the rear end.

[0017] Preferably, the first connecting rod is arranged obliquely between the front part of the seat cushion frame and the bracket assembly.

[0018] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0019] 1. By adopting the compact seat frame independent forward movement drive structure provided by the present utility model, the motor drives the nut sleeve to move linearly forward along the length direction of the lead screw, driving the rear end of the seat cushion frame to move forward along the chute. Since the two ends of the first connecting rod are respectively hinged to the seat cushion frame and the bracket assembly, during the forward movement of the rear end of the seat cushion frame, the first connecting rod can be driven to rotate around its hinge center with the bracket assembly, thereby driving the front part of the seat cushion frame to move forward, that is, the seat cushion frame as a whole moves forward relative to the upper slide rail module, providing space for the backrest frame to fold forward.

[0020] 2. During the forward movement of the seat cushion frame, since the base of the motor is rotationally assembled on the first connecting rod, the forward rotation of the first connecting rod can drive the entire telescopic drive device to move forward. In this way, not only the forward drive efficiency of the seat cushion frame is improved, but also the movement stroke of the lead screw can be shortened, and the telescopic drive device can be designed shorter, thereby achieving the purpose of simplifying the structure, optimizing the space utilization rate, and enhancing the overall assembly compactness. Description of the Drawings

[0021] Figure 1 It is a side view of the front row seat in the sitting posture state;

[0022] Figure 2 It is a schematic internal structure diagram of the front row seat in the sitting posture state;

[0023] Figure 3 It is a side view of the front row seat in the folded state;

[0024] Figure 4 It is a schematic internal structure diagram of the front row seat in the folded state;

[0025] Figure 5 It is a schematic diagram showing the layout structure of the second drive mechanism 6 (some components are hidden);

[0026] Figure 6 It is a schematic structural diagram of the compact seat frame independent forward movement drive structure;

[0027] Figure 7 It is a side view of one group of transition frames A1;

[0028] Figure 8 It is a schematic structural diagram of the front row seat. Detailed Embodiments

[0029] The present utility model will be further described below in conjunction with the embodiments and the drawings.

[0030] As Figure 1 and8 As shown in the figure, a front-row seat includes a slide rail 1, and a compact seat frame independent forward movement drive structure is connected to the slide rail 1. This structure includes a bracket assembly A installed on the slide rail 1. Above the bracket assembly A is provided a seat cushion skeleton 3. At the rear end of the bracket assembly A, a backrest skeleton 2 is rotatably installed. A drive mechanism capable of driving the backrest skeleton 2 to rotate forward or backward is provided on the backrest skeleton 2. The drive mechanism for driving the seat back to rotate forward and backward can adopt an electric angle adjuster, which is prior art and will not be elaborated here. Between the front part of the seat cushion skeleton 3 and the front end of the bracket assembly A, a first connecting rod 4 is provided. Both ends of the first connecting rod 4 are respectively hinged to the seat cushion skeleton 3 and the bracket assembly A. At the rear part of the bracket assembly A, a chute a extending along the length direction is provided. The rear end of the seat cushion skeleton 3 is slidably connected in the chute a. Between the first connecting rod 4 and the seat cushion skeleton 3, a telescopic drive device 6 is provided. Combining Figure 2 As shown in the figure, the telescopic drive device 6 includes a motor 61, a lead screw 62 driven by the motor 61 to rotate, and a nut sleeve 63 threadedly sleeved on the lead screw 62. The base of the motor 61 is rotatably assembled on the first connecting rod 4. A connecting portion 8 is fixedly assembled on the nut sleeve 63. The connecting portion 8 extends backward along the length direction of the lead screw 62. The rear end of the connecting portion 8, that is, the end far from the nut sleeve 63, is rotatably connected to the rear end of the seat cushion skeleton 3. Referring to Figures 2 to 4 , when the motor 61 drives the lead screw 62 to rotate, it can pull the rear part of the seat cushion skeleton 3 to move forward relative to the chute a through the connecting portion 8, that is, it can drive the first connecting rod 4 to rotate around its hinge center with the bracket assembly A. When the first connecting rod 4 rotates, it can drive the motor 61 to move.

[0031] Based on the above structural design, the working principle of the forward movement of the seat cushion skeleton 3 is as follows: The motor 61 drives the nut sleeve 63 to move forward in a straight line along the length direction of the lead screw 62, driving the rear end of the seat cushion skeleton 3 to move forward along the chute a. Since both ends of the first connecting rod 4 are respectively hinged to the seat cushion skeleton 3 and the bracket assembly A, during the process of the rear end of the seat cushion skeleton 3 moving forward, it can drive the first connecting rod 4 to rotate around its hinge center with the bracket assembly A, thereby driving the front part of the seat cushion skeleton 3 to move forward. That is, the seat cushion skeleton 3 as a whole moves forward relative to the upper slide rail module 1a, further eliminating the space interference below the backrest skeleton 2 and providing space for the backrest skeleton 2 to fold forward. During this process, since the base of the motor 61 is rotatably assembled on the first connecting rod 4, when the first connecting rod 4 rotates forward, it can drive the entire telescopic drive device 6 to move forward. That is, while the nut sleeve 63 moves forward along the lead screw 62, the nut sleeve 63 and the lead screw 62 as a whole also move forward. In this way, the movement stroke of the lead screw 62 can be shortened, the driving efficiency of the forward movement of the seat cushion skeleton 3 can be improved, the operation cost can be reduced, the structural design can be simplified, making the structural arrangement of the telescopic drive device 6 more compact and having the advantage of small occupied space.

[0032] Furthermore, as Figure 1 and5 As shown, the bracket assembly A includes a transition frame A1 fixedly mounted on the slide rail 1, one end of the first connecting rod 4 away from the seat cushion frame 3 is hinged at the front end of the transition frame A1, a slide groove a is arranged on the transition frame A1, and an upwardly extending adapter component A2 is provided at the rear end of the transition frame A1, and the lower end of the backrest frame 2 is rotatably assembled on the adapter component A2.

[0033] Please refer to Figure 2 A second connecting rod 5 is provided between the rear end of the seat cushion frame 3 and the rear part of the transition frame A1. The end of the second connecting rod 5 away from the seat cushion frame 3 is rotatably connected to the rear end of the connecting portion 8 through a pin shaft 7, and the pin shaft 7 is supported in the slide groove a so as to slide forward and backward. The motor 61 drives the nut sleeve 63 to move forward along the screw rod 62, and the connecting portion 8 on the nut sleeve 63 drives the pin shaft 7 to move forward along the slide groove a, which can drive the rear end of the seat cushion frame 3 to move forward.

[0034] Re-attend Figure 5 and 6 The slide rail 1 includes two sets of lower rails 12 arranged in parallel and symmetrically, and two sets of upper rails 11 respectively connected to the two sets of lower rails 12 in a sliding manner. A crossbeam is fixedly supported between the two sets of upper rails 11 to ensure the synchronization of the sliding of the two sets of upper rails 11. There are two sets of transition frames A1, and the two sets of transition frames A1 are respectively fixedly assembled on the two sets of upper rails 11. In this embodiment, the transition frame A1 can be fixedly installed on the corresponding upper rail 11, or it can be integrally formed with the corresponding upper rail 11.

[0035] like Figure 5 As shown, there are two groups of first connecting rods 4, one end of each group of first connecting rods 4 is respectively hinged to the two sides of the front part of the seat cushion frame 3, and the other end of each group of first connecting rods 4 is respectively hinged to the corresponding transition frame A1, and the first cross bar 9 is rotatably connected between the upper parts of the two groups of first connecting rods 4. Furthermore, there are two groups of second connecting rods 5, and the two sides of the rear end of the seat cushion frame 3 are respectively assembled on the two groups of transition frames A1 through the two groups of second connecting rods 5 so as to be movable forward and backward. Figure 6 and 8 In order to ensure the smoothness and stability of the overall forward sliding of the seat cushion frame 3, in this embodiment, a support cross bar 31 is provided at the rear of the seat cushion frame 3, the upper ends of the two sets of second connecting rods 5 are respectively connected to the two ends of the support cross bar 31, and the lower ends of the two sets of second connecting rods 5 are respectively supported in the corresponding sliding groove a of the transition frame A1 through the pin shaft 7. A second cross bar 10 is placed horizontally between the two pin shafts 7 to ensure the synchronization of the movement of the two pin shafts 7, thereby ensuring the reliability of the forward movement of the seat cushion frame 3.

[0036] Further, by Figure 5It can be seen that the telescopic driving device 6 is arranged inside one group of transition frames A1, and the base of the motor 61 is rotatably connected to the first cross bar 9 through an adapter c. The motor 61 drives the lead screw 62 to rotate, and the nut sleeve 63 linearly moves forward along the lead screw 62, which can drive the two groups of second connecting rods 5 to slide forward along the corresponding sliding grooves a, thereby driving the two groups of first connecting rods 4 to rotate upward and then forward around their hinge centers with the transition frames A1. During this process, the two groups of first connecting rods 4 drive the first cross bar 9 to rotate upward and forward, which can drive the motor 61 to move forward.

[0037] Please refer Figure 7 , in this embodiment, the sliding groove a is configured as a wavy structure, which includes an inclined section a1, a first transition section a2, a first horizontal section a3, a second transition section a4, and a second horizontal section a5 that are sequentially connected from front to back. Among them, the height of the front end of the inclined section a1 is lower than that of the rear end, the first transition section a2 is an arc section, and the second transition section a4 inclines backward and downward. When the seat is in the sitting state, the pin shaft 7 is located at the rearmost end of the sliding groove a (refer to Figure 2 ), during the process that the telescopic driving device 6 drives the rear part of the seat cushion frame 3 to move forward, under the guidance of the sliding groove a, the pin shaft 7 slides from the rearmost end to the foremost end (refer to Figure 4 ), that is, it drives the seat cushion frame 3 to first move forward slowly horizontally and then move downward. Since the cushion of an automotive seat is usually designed to incline slightly backward and downward, such a movement trajectory can further increase the folding space below the backrest frame 2 to ensure that the backrest frame 2 can fall forward flat.

[0038] Refer again Figure 2 , in the initial state, that is, when the seat cushion frame 3 has not moved forward, the first connecting rod 4 is inclined and arranged between the front part of the seat cushion frame 3 and the transition frame A1, and the height of its front end is lower than that of the rear end, that is, when the seat is in the sitting state, the upper end of the first connecting rod 4 is inclined and hinged to the front part of the seat cushion frame 3 backward. The advantage of such a design is that when the seat cushion frame 3 moves forward, the first connecting rod 4 rotates from back to up and then down around the hinge point at its lower end, ensuring the maximum rotation angle of the first connecting rod 4, so that the first connecting rod 4 can drive the seat cushion frame 3 to move forward to the farthest distance to the maximum extent (refer to Figure 4 ). In addition, when the upper end of the first connecting rod 4 rotates upward to the highest point, it can make the rear part of the seat cushion frame 3 incline downward, further increasing the folding space for the backrest frame 2 to fold downward. After that, the first connecting rod 4 continues to rotate downward, and the seat cushion frame 3 can move forward and then downward as a whole, that is, it maximally ensures the avoidance space of the seat cushion frame 3, increases the angle of the backrest frame 2 falling forward, thereby providing sufficient activity space for the rear passengers, and further improving the comfort of the rear passengers.

[0039] Finally, it should be noted that the above description is only the preferred embodiment of the present utility model. Under the inspiration of the present utility model, those of ordinary skill in the art can make various similar representations without violating the purpose and claims of the present utility model. Such transformations all fall within the protection scope of the present utility model.

Claims

1. A compact seat frame independent forward movement drive structure, characterized in that The invention comprises a support assembly (A) for being mounted on a slide rail, a seat cushion frame (3) being arranged above the support assembly (A), a first connecting rod (4) being arranged between the front part of the seat cushion frame (3) and the front end of the support assembly (A), the two ends of the first connecting rod (4) being respectively hinged to the seat cushion frame (3) and the support assembly (A), a slide groove (a) extending in the length direction being arranged at the rear part of the support assembly (A), and the rear end of the seat cushion frame (3) being slidably connected in the slide groove (a) forward and backward; A telescopic driving device (6) is provided between the first connecting rod (4) and the seat cushion frame (3), the telescopic driving device (6) comprising a motor (61), a screw rod (62) driven to rotate by the motor (61), and a nut sleeve (63) threadedly sleeved on the screw rod (62), the base of the motor (61) is rotatably mounted on the first connecting rod (4), a connecting portion (8) is fixedly mounted on the nut sleeve (63), and the connecting portion (8) is rotatably connected to the rear end of the seat cushion frame (3) at one end away from the nut sleeve (63); The motor (61) drives the screw rod (62) to rotate, and can pull the rear part of the seat cushion frame (3) to move forward relative to the slide groove (a) through the connecting part (8).

2. The compact seat frame independent forward movement drive structure according to claim 1, wherein: The support assembly (A) comprises a transition frame (A1) for being fixedly mounted on a slide rail, one end of the first connecting rod (4) away from the seat cushion frame (3) is hinged to the front end of the transition frame (A1), the slide groove (a) is arranged on the transition frame (A1), and a transfer component (A2) extending upward is provided at the rear end of the transition frame (A1), and the transfer component (A2) is used for rotationally assembling the backrest frame.

3. The compact seat frame independent forward movement drive structure according to claim 2, characterized in that: A second connecting rod (5) is provided between the rear end of the seat cushion frame (3) and the rear part of the bracket assembly (A); the end of the second connecting rod (5) away from the seat cushion frame (3) is rotatably connected to the connecting part (8) via a pin shaft (7); and the pin shaft (7) is supported in the slide groove (a) in a manner that it can slide forward and backward.

4. The compact seat frame independent forward movement drive structure according to claim 3, characterized in that: The invention also comprises a slide rail (1), wherein the slide rail (1) comprises two groups of lower rails (12) arranged in parallel and symmetrically, and two groups of upper rails (11) respectively slidably connected to the two groups of lower rails (12), a crossbeam being fixedly supported between the two groups of upper rails (11), and the number of the transition frames (A1) is two groups, and the two groups of transition frames (A1) are respectively fixedly assembled on the two groups of upper rails (11).

5. The compact seat frame independent forward movement drive structure according to claim 4, characterized in that: The first connecting rod (4) and the second connecting rod (5) are each provided with two groups, one end of the two groups of the first connecting rod (4) are respectively hinged to the two sides of the front end of the seat cushion frame (3), the other ends of the two groups of the first connecting rod (4) are respectively hinged to the corresponding transition frame (A1), and a first cross bar (9) is rotatably connected between the upper parts of the two groups of the first connecting rod (4).

6. The compact seat frame independent forward movement drive structure according to claim 5, characterized in that: Two groups of the second connecting rods (5) are arranged on both sides of the rear end of the seat cushion frame (3); the ends of the two groups of the second connecting rods (5) away from the seat cushion frame (3) are supported in corresponding slide grooves (a) through two pin shafts (7) respectively, and a second cross bar (10) is horizontally placed between the two pin shafts (7).

7. The compact seat frame independent forward movement drive structure according to claim 6, characterized in that: The telescopic driving device (6) is arranged inside one set of transition frames (A1), and the base of the motor (61) is rotatably connected to the first cross bar (9) through an adapter (c).

8. The compact seat frame independent forward movement drive structure according to claim 1, wherein: The chute (a) is configured as a wavy structure, which includes an inclined section (a1), a first transition section (a2), a first horizontal section (a3), a second transition section (a4), and a second horizontal section (a5) that are connected in sequence from front to back. The height of the front end of the inclined section (a1) is lower than that of the rear end.

9. The compact seat frame independent forward movement drive structure according to claim 1, characterized in that: The first connecting rod (4) is inclined and arranged between the front part of the seat cushion frame (3) and the bracket assembly (A).

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