Low suspension travel shock absorbing seat

Abstract

The present invention discloses a low suspension travel shock-absorbing seat. The low suspension travel shock-absorbing seat comprises a shock absorber upper end cover, a shock absorber bottom plate, and at least two scissor frame structures are arranged between the shock absorber upper end cover and the shock absorber bottom plate, the scissor frame structure comprises an inner scissor frame and an outer scissor frame, and the inner scissor frame is connected to the outer scissor frame through a pin shaft; the rear ends of the two inner scissor frames are rotatably connected to the shock absorber bottom plate through a first rotating shaft; the front ends of the two inner scissor frames are slidably connected to the shock absorber upper end cover through the first rollers at both ends of the second rotating shaft; the rear ends of the two outer scissor frames are rotatably connected to the shock absorber upper end cover through rotating pins; the front ends of the two outer scissor frames are slidably connected to the shock absorber bottom plate through the second rollers at both ends of the third rotating shaft; the inner scissor frame and / or the outer scissor frame are bent structures, so that the sliding tracks of the first roller and the second roller do not overlap. The present invention meets the height adjustment requirements of the shorter travel of the low suspension travel seat and improves the driving experience.

Description

Technical Field

[0001] The invention relates to the technical field of automobile seats, in particular to a low suspension travel shock-absorbing seat. Background Art

[0002] The space design of heavy truck seats, light truck seats, light passenger and cargo vehicle seats (such as pickup truck seats) and passenger car seats are different. In order to maximize the comfort of the driver and take into account the possible adjustment states of the seat such as horizontal adjustment, vertical adjustment and tilt adjustment, the seat design reference point (R point) of heavy truck seats is relatively high, while the R point of light trucks, light passenger and cargo vehicles and passenger cars is relatively low. It should be noted here that according to the height of the R point, heavy truck seats and other seats with higher R points belong to high suspension travel seats, while light truck seats, light passenger and cargo vehicle seats and passenger car seats and other seats with lower R points belong to low suspension travel seats.

[0003] At present, high suspension travel seats mainly use a scissor frame structure composed of linear scissor forks to achieve seat height adjustment. The height adjustment range of this scissor frame structure composed of linear scissor forks is limited by its own structure and cannot meet the shorter stroke height adjustment requirements of low suspension travel seats. Summary of the invention

[0004] In view of the above problems, the present invention is proposed to provide a low suspension travel shock absorbing seat which overcomes the above problems or at least partially solves the above problems.

[0005] The present invention provides a low suspension stroke shock-absorbing seat, the low suspension stroke shock-absorbing seat comprises a shock absorber upper end cover, a shock absorber base plate, and at least two scissor frame structures are arranged between the shock absorber upper end cover and the shock absorber base plate, the scissor frame structure comprises an inner scissor frame and an outer scissor frame, the inner scissor frame is connected to the outer scissor frame by a pin shaft; the rear ends of the two inner scissor frames are rotatably connected to the shock absorber base plate by a first rotating shaft; the front ends of the two inner scissor frames are slidably connected to the shock absorber upper end cover by first rollers at both ends of a second rotating shaft; the rear ends of the two outer scissor frames are rotatably connected to the shock absorber upper end cover by rotating pins; the front ends of the two outer scissor frames are slidably connected to the shock absorber base plate by second rollers at both ends of a third rotating shaft; the inner scissor frame and / or the outer scissor frame are a bending structure, so that the sliding trajectories of the first roller and the second roller do not overlap.

[0006] The beneficial effects of the present invention are as follows: a low suspension travel shock-absorbing seat comprises a shock absorber upper end cover, a shock absorber base plate, and at least two scissor frame structures are arranged between the shock absorber upper end cover and the shock absorber base plate, the scissor frame structure comprises an inner scissor frame and an outer scissor frame, the inner and outer scissor frames are rotatably connected to the shock absorber upper end cover and the shock absorber base plate through corresponding rotating shafts, rotating pins and rollers, and by improving the shape structure of the inner and outer scissor frames, the sliding trajectory of the first roller connected to the inner scissor frame and the sliding trajectory of the second roller connected to the outer scissor frame do not overlap, thereby avoiding the contact between the first roller and the second roller to limit the minimum angle between the inner and outer scissor frames, so that the shock absorber upper end cover is infinitely close to the shock absorber base plate according to the movement of the scissor frame structure, thereby meeting the height adjustment and / or suspension adjustment requirements of the shorter stroke of the low suspension travel seat, and improving the driving experience.

[0007] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0009] Figure 1 A perspective view of a low suspension travel shock absorbing seat according to one embodiment of the present invention is shown;

[0010] Figure 2 A three-dimensional diagram of a scissors frame structure according to an embodiment of the present invention is shown;

[0011] Figure 3 A cross-sectional view of a low suspension travel shock absorbing seat according to one embodiment of the present invention is shown;

[0012] Figure 4 shows a cross-sectional view of an airbag according to one embodiment of the present invention;

[0013] Figure 5 An exploded view of a low suspension travel shock absorbing seat according to one embodiment of the present invention is shown;

[0014] Figure 6 A schematic diagram of installing a height control valve according to an embodiment of the present invention is shown;

[0015] Figure 7A perspective view of a height control valve according to one embodiment of the present invention is shown;

[0016] Figure 8 An exploded view of a height control valve according to one embodiment of the present invention is shown;

[0017] Fig. 9 shows a cross-sectional view of a height control valve according to one embodiment of the present invention;

[0018] Fig.10 A perspective view of a valve stem according to an embodiment of the present invention is shown;

[0019] Fig.11 A schematic diagram showing an unlocked state of a locking mechanism according to an embodiment of the present invention is shown;

[0020] Fig.12 A schematic diagram showing a locking state of a locking mechanism according to an embodiment of the present invention is shown;

[0021] Fig.13 A schematic diagram of a locking plate according to an embodiment of the present invention is shown;

[0022] Description of reference numerals:

[0023] 1. Upper end cover of shock absorber;

[0024] 1-1, upper roller slide;

[0025] 2. Shock absorber base plate;

[0026] 2-1, lower roller slide;

[0027] 3. Scissor frame structure;

[0028] 3-1, internal scissor rack;

[0029] 3-2, external scissor rack;

[0030] 3-3, pin;

[0031] 4. Height control valve;

[0032] 410, valve body;

[0033] 411, valve chamber;

[0034] 411-1, first airflow chamber;

[0035] 411-2, second airflow chamber;

[0036] 411-3, gas source connection port;

[0037] 411-4, airbag connection port;

[0038] 411-5, first sealing ring;

[0039] 411-6, second sealing ring;

[0040] 411-7, end cap;

[0041] 411-8, stairs;

[0042] 411-9, support member;

[0043] 412, second rotating connection member;

[0044] 420, valve stem;

[0045] 421, first groove;

[0046] 422, second groove;

[0047] 423, first rotating connection member;

[0048] 5. Airbag;

[0049] 5-1, airbag upper cover;

[0050] 5-1-1, Mounting hole;

[0051] 5-1-2, groove;

[0052] 5-2, air bag lower end cover;

[0053] 5-2-1, buckle;

[0054] 5-3, capsule skin;

[0055] 6. The first rotation axis;

[0056] 7. Second rotation axis;

[0057] 8. The third rotation axis;

[0058] 9. Rotating pin;

[0059] 10. First roller;

[0060] 11. Second roller;

[0061] 12. Locking mechanism;

[0062] 12-1, first fixing plate;

[0063] 12-2, second fixing plate;

[0064] 12-3, locking plate;

[0065] 12-3-1, bayonet;

[0066] 12-4, locking column;

[0067] 12-5, operating lever;

[0068] 12-6, spring;

[0069] 13. Height limit strap;

[0070] 14. Limit block;

[0071] 15. Damper. DETAILED DESCRIPTION

[0072] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0073] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0074] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0075] Figure 1 A perspective view of a low suspension travel shock absorbing seat according to one embodiment of the present invention is shown. Figure 2 FIG. 4 shows a stereoscopic diagram of a scissors frame structure according to an embodiment of the present invention. Figure 1-2 As shown, the low suspension travel shock-absorbing seat includes a shock absorber upper end cover 1, a shock absorber bottom plate 2, at least two scissor frame structures 3 are arranged between the shock absorber upper end cover 1 and the shock absorber bottom plate 2, the scissor frame structure 3 includes an inner scissor frame 3-1 and an outer scissor frame 3-2, and the inner scissor frame 3-1 and the outer scissor frame 3-2 are connected by a pin shaft 3-3;

[0076] The rear ends of the two inner scissor frames 3-1 are rotatably connected to the shock absorber bottom plate 2 through the first rotating shaft 6; the front ends of the two inner scissor frames 3-1 are slidably connected to the shock absorber upper end cover 1 through the first rollers 10 at both ends of the second rotating shaft 7;

[0077] The rear ends of the two outer scissor frames 3-2 are rotatably connected to the upper end cover 1 of the shock absorber through a rotating pin 9. Compared with the arrangement in which the rear ends of the two outer scissor frames 3-2 are rotatably connected to the upper end cover 1 of the shock absorber through a rotating shaft, this arrangement can effectively avoid interference with other components and expand the height adjustment range of the low suspension travel seat to a certain extent; the front ends of the two outer scissor frames 3-2 are slidably connected to the shock absorber bottom plate 2 through the second rollers 11 at both ends of the third rotating shaft 8;

[0078] The inner scissor frame 3-1 and / or the outer scissor frame 3-2 are bent structures, for example, the inner scissor frame 3-1 is a bent structure, and the outer scissor frame 3-2 is a linear structure; or, the inner scissor frame 3-1 is a linear structure, and the outer scissor frame 3-2 is a bent structure; or, the inner scissor frame 3-1 and the outer scissor frame 3-2 are both bent structures; by improving the shape structure of the inner and outer scissor frames, the sliding trajectory of the first roller 10 and the sliding trajectory of the second roller 11 do not overlap, thereby avoiding the contact between the first roller 10 and the second roller 11 to limit the minimum angle between the inner and outer scissor frames, so that the upper end cover of the shock absorber is infinitely close to the shock absorber base plate according to the movement of the scissor frame structure, thereby meeting the height adjustment and / or suspension adjustment requirements of the shorter stroke of the low suspension travel seat, thereby improving the driving experience.

[0079] Figure 3 A cross-sectional view of a low suspension travel shock absorbing seat according to one embodiment of the present invention is shown. Figure 3 As shown, the shock absorber upper end cover 1 is provided with an upper roller groove 1-1 corresponding to the first roller 10 for providing a sliding track for the first roller 10; the shock absorber bottom plate 2 is provided with a lower roller groove 2-1 corresponding to the second roller 11 for providing a sliding track for the second roller 11.

[0080] It can be seen that the present application directly sets the shock absorber upper end cover and the upper roller slide groove together, and the shock absorber bottom plate and the lower roller slide groove together. Compared with the technical solution of setting the layered connection between the shock absorber upper cover and the slide rail in the prior art, the design solution of the present application reduces the thickness of the low suspension stroke seat body to a certain extent, thereby creating favorable conditions for achieving low suspension stroke suspension.

[0081] Still Figure 3 As shown, an air bag 5 is arranged between the upper end cover 1 of the shock absorber and the bottom plate 2 of the shock absorber. Figure 4 FIG. 4 shows a cross-sectional view of an airbag according to an embodiment of the present invention, Figure 4As shown, the airbag 5 includes an upper airbag cover 5-1, a lower airbag cover 5-2, and a bag skin 5-3 connected to the upper airbag cover 5-1 and the lower airbag cover 5-2. The upper airbag cover 5-1 is fixedly connected to the upper shock absorber cover 1, and the lower airbag cover 5-2 is fixedly connected to the shock absorber bottom plate 2. It can be seen that the present application directly connects the upper airbag cover 5-1 to the upper shock absorber cover 1, and the lower airbag cover 5-2 to the shock absorber bottom plate. Compared with the technical solution in the prior art that separately sets an airbag connecting plate on two inner scissor frames and sets the airbag between the airbag connecting plate and the shock absorber bottom plate, the design of the present application greatly reduces the thickness of the low suspension travel seat, thereby further creating favorable conditions for achieving low suspension travel suspension.

[0082] Preferably, the upper end cover 5-1 of the airbag is provided with a groove 5-1-2 corresponding to the lower end cover 5-2 of the airbag, and the diameter of the upper end cover 5-1 of the airbag is larger than the diameter of the lower end cover 5-2 of the airbag. In the prior art, the lower end of the upper end cover of the airbag corresponding to the lower end cover of the airbag is not provided with a groove. When the lower end of the upper end cover of the airbag is in direct contact with the upper end of the lower end cover of the airbag, the height of the airbag no longer changes. However, in the design of the present application, when the low suspension travel seat is lowered, the end of the lower end cover of the airbag drives the airbag skin to continue to move in the groove of the upper end cover of the airbag, thereby making the height of the airbag lower. It can be seen that the improvement of the structure of the upper end cover of the airbag in the present application further creates favorable conditions for achieving low suspension travel suspension.

[0083] Furthermore, in order to stably set the airbag 5 between the shock absorber upper end cover 1 and the shock absorber base plate 2, and to avoid increasing the thickness of the low suspension travel seat during the installation of the airbag 5, at least one mounting hole 5-1-1 is provided on the airbag upper end cover 5-1. For example, the mounting hole 5-1-1 is a threaded hole, and the shock absorber upper end cover 1 is provided with a through hole corresponding to the mounting hole 5-1-1. Screws are passed through the through hole and connected with the threaded hole to achieve fixed connection between the airbag upper end cover 5-1 and the shock absorber upper end cover 1; at least one buckle 5-2-1 is provided on the airbag lower end cover 5-2, and correspondingly, a corresponding buckle is provided on the shock absorber base plate 2 with a corresponding slot. Through the cooperation of the buckle and the slot, the airbag lower end cover 5-2 can be quickly installed on the shock absorber base plate 2.

[0084] Furthermore, in order to reduce the space occupied by the low suspension travel car seat body, the shock absorber upper end cover 1 includes a seat pot shape and a foam support member shape. In other words, the shock absorber upper end cover 1 is used as a shock absorber upper frame, a seat pot and a foam support member at the same time, thereby further reducing the thickness of the low suspension travel shock-absorbing seat body and further expanding the height adjustment range of the short travel of the low suspension travel seat.

[0085] Figure 5 An exploded view of a low suspension travel shock absorbing seat according to one embodiment of the present invention is shown. Figure 6 FIG. 1 shows a schematic diagram of installing a height control valve according to an embodiment of the present invention. Figure 5-6 As shown, the low suspension travel seat includes a shock absorber upper end cover 1 and a shock absorber bottom plate 2, at least two scissor frame structures 3 are arranged between the shock absorber upper end cover 1 and the shock absorber bottom plate 2, and a height control valve 4 connected to the airbag 5 is arranged between the shock absorber upper end cover 1 and the shock absorber bottom plate 2. The height control valve 4 is used to control the inflation or exhaust of the airbag 5 to achieve the height adjustment or suspension adjustment of the low suspension travel seat, or both the height adjustment and suspension adjustment of the low suspension travel seat can be achieved, so as to improve the comfort of the low suspension travel seat. It should be noted that in the process of achieving the suspension adjustment of the low suspension travel seat, the height control valve 4 collects the height change between the shock absorber upper end cover 1 and the shock absorber bottom plate 2, and controls the inflation or deflation of the airbag 5 according to the height change, so that the height of the shock absorber upper end cover 1 relative to the shock absorber bottom plate 2 is maintained at a preset suspension height. Specifically, the preset suspension height is 75mm. It can be seen that the low suspension travel shock-absorbing seat for which protection is sought in this application uses an airbag shock-absorbing mechanism to achieve suspension adjustment, which solves the technical problem in the prior art that suspension adjustment cannot be achieved through the airbag shock-absorbing mechanism due to the limitation of the low R point of the low suspension travel seat itself, thereby improving the comfort of the low suspension travel shock-absorbing seat.

[0086] Here, the structure of the height control valve 4 is described. Figure 7 FIG. 1 shows a perspective view of a height control valve according to an embodiment of the present invention, Figure 8 FIG. 2 shows an exploded view of a height control valve according to an embodiment of the present invention. Fig. 9 FIG. 4 shows a cross-sectional view of a height control valve according to an embodiment of the present invention, Fig.10 FIG. 4 shows a perspective view of a valve stem according to an embodiment of the present invention. Figure 7-10 As shown, the height control valve 4 includes a valve body 410 and a valve stem 420. A valve chamber 411 is provided in the valve body 410. The valve stem 420 can axially reciprocate in the valve chamber 411.

[0087] The valve chamber 411 is provided with a first airflow chamber 411-1 and a second airflow chamber 411-2. The first airflow chamber 411-1 is connected to the air source through an air source connection port 411-3, and the second airflow chamber 411-2 is connected to the airbag through an airbag connection port 411-4.

[0088] The outer wall of the valve stem 420 is provided with at least one first groove 421. The valve stem 420 slides different distances in the valve chamber 411. The first groove 421 connects the first airflow chamber 411-1 and the second airflow chamber 411-2 to control the inflation of the airbag; or, the first groove 421 connects the second airflow chamber 411-2 and the outside to control the deflation of the airbag.

[0089] It can be seen that the height control valve is a linear structure, which is adapted to the structure of the scissor frame, so it matches the movement of the scissor frame and can follow the scissor frame to move to a lower position. It can not only collect the height change of the low suspension travel seat, but also adjust its own working stroke according to this height change, control the inflation or deflation of the airbag, so as to achieve height adjustment or suspension adjustment in the ultra-low travel of the low suspension travel seat, or both the height adjustment and suspension adjustment of the low suspension travel seat can be achieved, so as to improve the comfort of the low suspension travel seat. In addition, the height control valve has a simple structure, convenient installation, stable operation and low cost.

[0090] Further, as Fig. 9 As shown, two sealing rings are arranged on the inner wall of the valve chamber 411, and the first airflow chamber 411-1 and the second airflow chamber 411-2 are separated in the valve chamber 411; the valve stem 420 slides different distances in the valve chamber 411, and the first groove 421 crosses the first sealing ring 411-5 to connect the first airflow chamber 411-1 and the second airflow chamber 411-2, so as to control the inflation of the airbag; the first groove 421 crosses the second sealing ring 411-6 to connect the second airflow chamber 411-2 and the outside, so as to control the deflation of the airbag. It should be noted here that separating the first airflow chamber and the second airflow chamber in the valve chamber by setting a sealing ring is only one implementation method, and other methods that can separate the first airflow chamber and the second airflow chamber in the valve chamber are all within the protection scope of this application.

[0091] Further, as Fig.10 As shown, the second grooves 422 are respectively disposed at two axial ends of the first groove 421 , the first groove 421 is communicated with the second groove 422 , and the width of the second groove 422 is smaller than that of the first groove 421 .

[0092] When the height of the low suspension travel seat is at the suspended height, the first groove 421 and the second groove 422 are both located in the first airflow cavity 411 - 1 , and at this time, the airbag is neither inflated nor exhausted.

[0093] When the second groove 422 located at the lower part of the first groove 421 crosses the first sealing ring 411-5, trace gas enters the airbag through the second groove 422, and the height of the low suspension travel seat increases slightly; when the second groove 422 located at the upper part of the first groove 421 crosses the second sealing ring 411-6, trace gas is discharged into the atmosphere through the second groove 422, and the height of the low suspension travel seat decreases slightly.

[0094] When the first groove 421 crosses the first sealing ring 411-5, more gas enters the airbag through the first groove 421, and the height of the low suspension travel seat increases significantly; when the first groove 421 crosses the second sealing ring 411-6, more gas is discharged into the atmosphere through the second groove 422, and the height of the low suspension travel seat decreases significantly.

[0095] It can be seen that by providing the first groove 421 and the second groove 422 , the suspension adjustment amplitude changes gradually, thereby further improving the comfort.

[0096] Furthermore, the first groove 421 includes a rectangular groove and a V-shaped groove that are connected to each other, and the V-shaped grooves are arranged at two axial ends of the rectangular groove. The shape of the first groove 421 in a top view can be set to be rectangular in the middle and triangular at both ends.

[0097] When the height of the low suspension travel seat is at the suspended height, the entire structure of the first groove 421 is located in the first airflow chamber 411 - 1 , and at this time, the airbag is neither inflated nor exhausted.

[0098] When the V-shaped groove at the lower part of the second groove 422 crosses the first sealing ring 411-5, trace gas enters the airbag through the second groove 422, and the height of the low suspension travel seat increases slightly; when the V-shaped groove at the upper part of the second groove 422 crosses the second sealing ring 411-6, trace gas is discharged into the atmosphere through the second groove 422, and the height of the low suspension travel seat decreases slightly.

[0099] When the rectangular groove of the first groove 421 crosses the first sealing ring 411-5, more gas enters the airbag through the first groove 421, and the height of the low suspension travel seat increases significantly; when the rectangular groove of the first groove 421 crosses the second sealing ring 411-6, more gas is discharged into the atmosphere through the second groove 422, and the height of the low suspension travel seat decreases significantly.

[0100] It can be seen that by setting the shape of the first groove 421, the suspension adjustment amplitude changes gradually, further improving the comfort.

[0101] Of course, in order to prevent the low suspension travel seat from bottoming out, the number of first grooves 421 can be increased, and the depth of the first grooves 421 can also be changed. The present application does not further limit the number and depth of the first grooves 421. At the same time, in order to meet the suspension adjustment requirements of different low suspension travel seats, the number of second grooves 422 can be increased, and the depth of the second grooves 422 can also be changed. The present application does not further limit the number and depth of the second grooves 422.

[0102] In summary, the present application can not only adjust the suspension height range of the low suspension travel seat by changing the position, number and depth of the first groove and the second groove, but also adjust the suspension height range of the low suspension travel seat by setting the shape and depth of the first groove, thereby improving comfort.

[0103] Still Figure 6 As shown, the low suspension travel seat includes a shock absorber upper end cover 1, a shock absorber base plate 2, and at least two scissor frame structures 3 are arranged between the shock absorber upper end cover 1 and the shock absorber base plate 2. The scissor frame structure 3 includes an inner scissor frame 3-1 and an outer scissor frame 3-2. The inner scissor frame 3-1 is connected to the outer scissor frame 3-2 by a pin shaft 3-3. A height control valve 4 is arranged between the shock absorber upper end cover 1 and the shock absorber base plate 2. The height control valve 4 can not only collect the height change between the shock absorber upper end cover 1 and the shock absorber base plate 2, but also adjust its own working stroke according to the height change, thereby controlling the inflation or deflation of the airbag. It can be seen that since the height control valve is a linear structure, as long as the height control valve 4 is set between the shock absorber upper end cover 1 and the shock absorber base plate 2, the height change between the shock absorber upper end cover 1 and the shock absorber base plate 2 can be collected, and its own working stroke can be adjusted according to this height change to control the inflation or deflation of the airbag, thereby realizing the height adjustment and / or suspension adjustment of the low suspension travel seat. It can be seen that the installation position of the height control valve is not restricted and it is more applicable.

[0104] The installation methods of the height control valve 4 mainly include the following:

[0105] The first one is that a first rotating connector 423 is provided on the valve stem 420, and the valve stem 420 is rotatably connected to the shock absorber upper end cover 1 through the first rotating connector 423; a second rotating connector 412 is provided on the valve body 410, and the valve body 410 is rotatably connected to the shock absorber base plate 2 through the second rotating connector 412.

[0106] The second type is that a first rotating connector 423 is provided on the valve stem 420, and the valve stem 420 is rotatably connected to the pin shaft 3-3 through the first rotating connector 423; a second rotating connector 412 is provided on the valve body 410, and the valve body 410 is rotatably connected to the shock absorber base plate 2 through the second rotating connector 412.

[0107] The third type is that a first rotating connector 423 is provided on the valve stem 420, and the valve stem 420 is rotatably connected to the inner scissor frame 3-1 or the outer scissor frame 3-2 through the first rotating connector 423; a second rotating connector 412 is provided on the valve body 410, and the valve body 410 is rotatably connected to the shock absorber base plate 2 through the second rotating connector 412.

[0108] Further, in order to realize the rotatable connection between the valve stem 420 and the shock absorber upper end cover 1, the inner scissor frame 3-1 or the outer scissor frame 3-2, a first fixing device (not shown in the figure) for rotatably connecting with the first rotating connection member 423 can be provided on the shock absorber upper end cover 1, the inner scissor frame 3-1 or the outer scissor frame 3-2. For example, the first fixing device is a cylindrical protrusion, and the first rotating connection member 423 is rotatably connected with the cylindrical protrusion; in addition, in order to realize the rotatable connection between the valve body 410 and the shock absorber bottom plate 2, a second fixing device 5 for rotatably connecting with the second rotating connection member 412 is provided on the shock absorber bottom plate 2. For example, the second fixing device 5 includes an L-shaped base, and a cylindrical protrusion is provided on the L-shaped base, and the second rotating connection member 412 is rotatably connected with the cylindrical protrusion.

[0109] Further, as Figure 8 or Fig. 9 As shown, an end cap 411-7 is provided at the end of the valve chamber 411, and a through hole is provided on the end cap 411-7, through which the valve stem 420 can slide axially back and forth in the valve chamber 411. The end cap guides the valve stem to ensure the normal operation of the valve stem.

[0110] Furthermore, in order to better set the sealing ring on the inner wall of the valve chamber 411, two installation grooves for fixing the sealing ring are provided on the inner wall of the valve chamber 411. The thickness of the installation groove is smaller than the thickness of the sealing ring to ensure smooth sliding of the valve stem in the valve chamber.

[0111] Further, as Fig. 9 As shown, the sealing ring is arranged on the inner wall of the valve chamber 411. In addition to the installation groove of the sealing ring on the inner wall of the valve chamber 411, the sealing ring can also be arranged in the following manner: a step 411-8 is arranged in the valve chamber, and the first sealing ring 411-5 is arranged on the step 411-8; the second sealing ring 411-6 is arranged on the end cover 411-7; a support member 411-9 is arranged between the first sealing ring 411-5 and the second sealing ring 411-6, and the thickness of the support member 411-9 is less than the thickness of the two sealing rings, so as to ensure the smooth sliding of the valve stem in the valve chamber. It should be noted that in actual applications, the setting method of the sealing ring can be selected according to needs, and this application does not further limit the setting method of the sealing ring.

[0112] Furthermore, the piston of the airbag 5 is in a conical shape. By setting the piston of the airbag 5 in a conical shape, the area of ​​the airbag skin covering the piston increases, so that the height of the airbag descent is lowered, thereby extending the height range of the seat descent.

[0113] Further, still Figure 5 As shown, in order to enhance the shock absorbing effect of the seat, a damper 15 is arranged between the shock absorber upper end cover 1 and the shock absorber bottom plate 2. For example, the damper 15 is a CDC damper.

[0114] Since the cab space of the low suspension travel seat is limited, in order to prevent the driver's head from hitting the top of the cab, a height limiting pull strap 13 is set between the shock absorber upper end cover 1 and the shock absorber bottom plate 2. For example, the material of the height limiting pull strap 13 is the same as the material of the seat belt webbing, where the main raw materials of the seat belt webbing are polyester, polypropylene and nylon.

[0115] In order to prevent the light truck from bottoming out when driving on a bumpy road, a limit block 14 is provided between the shock absorber upper end cover 1 and the shock absorber bottom plate 2. For example, two limit blocks 14 are evenly provided at the front end or rear end of the low suspension travel seat. The present application does not further limit the number and position of the limit blocks.

[0116] It should be noted that, in practical applications, the damper 15, the height limiting strap 13 and the limit block 14 can be simultaneously arranged between the shock absorber upper end cover 1 and the shock absorber bottom plate 2 as required, or any one or two of the three mechanisms can be arranged between the shock absorber upper end cover 1 and the shock absorber bottom plate 2. Here, the present application does not further limit the number of the three mechanisms arranged between the shock absorber upper end cover 1 and the shock absorber bottom plate 2.

[0117] Further, Fig.11 FIG. 1 is a schematic diagram showing an unlocked state of a locking mechanism according to an embodiment of the present invention, Fig.12 A schematic diagram showing a locking state of a locking mechanism according to an embodiment of the present invention is shown. Fig.13 FIG. 4 shows a schematic diagram of a locking plate according to an embodiment of the present invention, as shown in FIG. Figure 11-13 As shown, a locking mechanism 12 is provided between the shock absorber upper end cover 1 and the shock absorber bottom plate 2. Specifically, the locking mechanism 12 includes a first fixing plate 12-1, a second fixing plate 12-2, a locking plate 12-3, a locking column 12-4, an operating rod 12-5 and a spring 12-6; the first fixing plate 12-1 is provided on the shock absorber upper end cover 1, and the second fixing plate 12-2 is provided on the shock absorber bottom plate 2; the locking plate 12-3 is rotatably connected to the first fixing plate 12-1; the locking column 12-4 is provided on the second fixing plate 12-2; the operating rod 12-5 The locking plate 12-3 is provided with a bayonet 12-3-1 at one end of the locking plate 12-3 near the locking column 12-4; the spring 12-6 connects the first fixing plate 12-1 and the operating rod 12-5; the operating rod 12-5 controls the rotation of the locking plate 12-3, the bayonet 12-3-1 of the locking plate 12-3 is unlocked from the locking column 12-4, and under the pulling force of the spring 12-5, the bayonet 12-3-1 of the locking plate 12-3 is locked with the locking column 12-4. The shape of the operating rod 12-5 includes an L shape or a spherical shape, and the shape of the operating rod 12-5 is not further limited here.

[0118] When a low suspension travel car is traveling on a relatively flat road, the locking mechanism 12 can be opened, and the airbag can be inflated or exhausted through the height control valve to achieve suspension adjustment of the low suspension travel car seat and improve the comfort of the low suspension travel car seat; when a low suspension travel car is traveling on a relatively bumpy road, the locking mechanism 12 can be closed to fix the height between the shock absorber upper end cover 1 and the shock absorber bottom plate 2 at a specific position to prevent the driver's head from touching the top of the cab and the seat from touching the bottom. It can be seen that the design of the locking mechanism helps to improve the user experience.

[0119] Preferably, when the vehicle is traveling on a relatively flat road, the low suspension travel seat is in a suspended state, and the height of the shock absorber upper end cover 1 relative to the shock absorber bottom plate 2 is maintained at a preset suspension height, for example, the preset suspension height is 75mm. During the vehicle driving process, the height control valve 4 controls the inflation or deflation of the airbag 5 according to the height change between the shock absorber upper end cover 1 and the shock absorber bottom plate 2, and takes the preset suspension height as the vibration balance point, so that the shock absorber upper end cover 1 is suspended relative to the shock absorber bottom plate 2 within an amplitude of 20mm above and below the vibration balance point. That is, it floats up and down a certain distance at the preset suspension height position, thereby improving the seismic isolation effect of the low suspension travel seat and improving comfort.

[0120] Preferably, the preset height variation range of the airbag lifting is [41mm, 110mm]. Specifically, when the vehicle is traveling on a bumpy road, the low suspension travel seat is in a suspended state. During the vehicle driving process, when the shock absorber upper end cover 1 follows the airbag 5 to move to the lowest position of the airbag (for example, the lowest position of the airbag is 41mm), the height control valve 4 controls the airbag 5 to inflate, so that the height of the shock absorber upper end cover 1 relative to the shock absorber bottom plate 2 is maintained at the preset suspension height; when the shock absorber upper end cover 1 follows the airbag 5 to move to the highest position of the airbag (for example, the highest position of the airbag is 110mm), the height control valve 4 controls the airbag 5 to exhaust, so that the height of the shock absorber upper end cover 1 relative to the shock absorber bottom plate 2 is maintained at the preset suspension height.

[0121] It can be seen that no matter whether the vehicle is driving on a relatively bumpy road or a relatively flat road, the low suspension travel seat can be in a suspended state, making the low suspension travel seat's comfort the best. Moreover, no matter the vehicle is transitioning from a relatively bumpy road to a relatively flat road, or from a relatively flat road to a relatively bumpy road, the low suspension travel seat can achieve good suspension adjustment and high comfort.

[0122] To summarize, the low suspension travel shock-absorbing seat includes a shock absorber upper end cover, a shock absorber base plate, and at least two scissor frame structures are arranged between the shock absorber upper end cover and the shock absorber base plate, the scissor frame structure includes an inner scissor frame and an outer scissor frame, the inner and outer scissor frames are rotatably connected to the shock absorber upper end cover and the shock absorber base plate through corresponding rotating shafts, rotating pins and rollers, and by improving the shape structure of the inner and outer scissor frames, the sliding trajectory of the first roller connected to the inner scissor frame and the sliding trajectory of the second roller connected to the outer scissor frame do not overlap, thereby avoiding the contact between the first roller and the second roller to limit the minimum angle between the inner and outer scissor frames, so that the shock absorber upper end cover is infinitely close to the shock absorber base plate according to the movement of the scissor frame structure, thereby meeting the height adjustment and / or suspension adjustment requirements of the shorter stroke of the low suspension travel seat, thereby improving the driving experience.

[0123] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the scope of protection of the present invention.

Claims

1. A low suspension travel shock absorbing seat, characterized in that: The low suspension travel shock-absorbing seat comprises a shock absorber upper end cover, a shock absorber bottom plate, and at least two scissor frame structures are arranged between the shock absorber upper end cover and the shock absorber bottom plate, wherein the scissor frame structure comprises an inner scissor frame and an outer scissor frame, and the inner scissor frame and the outer scissor frame are connected by a pin shaft; The rear ends of the two inner scissor racks are rotatably connected to the bottom plate of the shock absorber through a first rotating shaft; the front ends of the two inner scissor racks are slidably connected to the upper end cover of the shock absorber through first rollers at both ends of the second rotating shaft; The rear ends of the two outer scissor racks are rotatably connected to the upper end cover of the shock absorber through a rotating pin; the front ends of the two outer scissor racks are slidably connected to the bottom plate of the shock absorber through the second rollers at both ends of the third rotating shaft; The inner scissor frame and / or the outer scissor frame is a bent structure, so that the sliding tracks of the first roller and the second roller do not overlap; An airbag is arranged between the upper end cover of the shock absorber and the bottom plate of the shock absorber, and the airbag includes an upper end cover of the airbag, a lower end cover of the airbag and a bag skin connected to the upper end cover of the airbag and the lower end cover of the airbag. The upper end cover of the airbag is fixedly connected to the upper end cover of the shock absorber, and the lower end cover of the airbag is fixedly connected to the bottom plate of the shock absorber.

2. The low suspension travel shock absorbing seat as claimed in claim 1, characterized in that: The upper end cover of the shock absorber is provided with an upper roller sliding groove corresponding to the first roller for providing a sliding track for the first roller; The shock absorber bottom plate is provided with a lower roller sliding groove corresponding to the second roller for providing a sliding track for the second roller.

3. The low suspension travel shock absorbing seat as claimed in claim 1, characterized in that: The airbag upper end cover is provided with a groove corresponding to the airbag lower end cover, and the diameter of the airbag upper end cover is greater than the diameter of the airbag lower end cover.

4. The low suspension travel shock absorbing seat as claimed in claim 1, characterized in that: The airbag upper end cover is provided with at least one mounting hole, and the airbag lower end cover is provided with at least one buckle.

5. The low suspension travel shock absorbing seat as claimed in claim 1, characterized in that: The shock absorber upper end cover includes a seat basin shape and a foam support piece shape.

6. The low suspension travel shock absorbing seat according to claim 1, characterized in that: The low suspension travel shock-absorbing seat also includes a height control valve for controlling the inflation or deflation of the airbag, and the airbag is connected to the height control valve; the height control valve is arranged between the shock absorber upper end cover and the shock absorber base plate, and the height control valve is used to collect the height change between the shock absorber upper end cover and the shock absorber base plate, and control the inflation or deflation of the airbag according to the height change, so that the height of the shock absorber upper end cover relative to the shock absorber base plate is maintained at a preset suspension height.

7. The low suspension travel shock absorbing seat as claimed in claim 6, characterized in that: When the upper end cover of the shock absorber moves to the lowest position of the airbag following the airbag, the height control valve controls the inflation of the airbag so that the height of the upper end cover of the shock absorber relative to the bottom plate of the shock absorber is maintained at the preset suspension height; When the upper end cover of the shock absorber moves with the airbag to the highest position of the airbag, the height control valve controls the exhaust of the airbag so that the height of the upper end cover of the shock absorber relative to the shock absorber bottom plate is maintained at the preset suspension height.

8. The low suspension travel shock absorbing seat as claimed in claim 6, characterized in that: The height control valve comprises a valve body and a valve stem, wherein a valve chamber is arranged in the valve body, and the valve stem can axially reciprocate in the valve chamber; The valve chamber is provided with a first airflow chamber and a second airflow chamber, the first airflow chamber is connected to the air source, and the second airflow chamber is connected to the airbag; The outer wall of the valve stem is provided with at least one first groove; The valve stem slides different distances in the valve chamber, and the first groove connects the first airflow cavity and the second airflow cavity, or the first groove connects the second airflow cavity and the outside.

9. The low suspension travel shock absorbing seat as claimed in claim 8, characterized in that: Two sealing rings are arranged on the inner wall of the valve chamber, and a first airflow cavity and a second airflow cavity are separated in the valve chamber; The valve stem slides different distances in the valve chamber, the first groove spans the first sealing ring to connect the first airflow chamber and the second airflow chamber; the first groove spans the second sealing ring to connect the second airflow chamber and the outside.

10. The low suspension travel shock absorbing seat according to claim 8, characterized in that: Second grooves are respectively disposed at two axial ends of the first groove, the first groove is communicated with the second groove, and a width of the second groove is smaller than a width of the first groove.

11. The low suspension travel shock absorbing seat according to claim 8, characterized in that: The first groove includes a rectangular groove and a V-shaped groove which are connected to each other, and the V-shaped groove is arranged at two ends of the rectangular groove.

12. The low suspension travel shock absorbing seat according to claim 8, characterized in that: The valve stem is provided with a first rotating connection member, and the valve stem is rotatably connected to the upper end cover of the shock absorber, the pin shaft, the inner scissor frame or the outer scissor frame through the first rotating connection member; The valve body is provided with a second rotating connection member, and the valve body is rotatably connected to the shock absorber bottom plate through the second rotating connection member; The shock absorber upper end cover, the inner scissor frame or the outer scissor frame is provided with a first fixing device for rotationally connecting with the first rotating connecting member; The shock absorber bottom plate is provided with a second fixing device for rotationally connecting with the second rotating connecting member.

13. The low suspension travel shock absorbing seat as claimed in claim 8, characterized in that: An end cover is provided at the end of the valve chamber, and a through hole is provided on the end cover. The valve stem can axially reciprocate and slide in the valve chamber through the through hole.

14. The low suspension travel shock absorbing seat as claimed in claim 9, characterized in that: A step is provided in the valve chamber, and the first sealing ring is provided on the step; The second sealing ring is arranged on the end cover; A support member is provided between the first sealing ring and the second sealing ring, and a height of the support member is smaller than a height of the sealing ring.

15. The low suspension travel shock absorbing seat according to claim 1, characterized in that: The piston of the airbag is in a conical shape.

16. The low suspension travel shock absorbing seat according to claim 1, characterized in that: Any one or more of a damper, a height limiting pull belt or a limit block is arranged between the shock absorber upper end cover and the shock absorber bottom plate.

17. The low suspension travel shock absorbing seat according to claim 1, characterized in that: A locking mechanism is provided between the shock absorber upper end cover and the shock absorber bottom plate; The locking mechanism comprises a first fixing plate, a second fixing plate, a locking plate, a locking column, an operating rod and a spring. The first fixing plate is arranged on the upper end cover of the shock absorber, and the second fixing plate is arranged on the bottom plate of the shock absorber; The locking plate is rotatably connected to the first fixing plate; The locking column is arranged on the second fixing plate; The operating rod is arranged on the locking plate; A bayonet is provided at one end of the locking plate close to the locking column; The spring connects the first fixing plate and the operating rod; The operating rod controls the locking plate to rotate, the bayonet of the locking plate is unlocked from the locking column, and under the pulling force of the spring, the bayonet of the locking plate is locked with the locking column.

18. The low suspension travel shock absorbing seat according to claim 1, characterized in that: The preset height adjustment range of the shock absorber upper end cover relative to the shock absorber base plate is [41mm, 110mm].

19. The low suspension travel shock absorbing seat according to claim 1, characterized in that: The preset suspension height range of the shock absorber upper end cover relative to the shock absorber bottom plate is [55mm, 95mm].

20. The low suspension travel shock absorbing seat according to claim 19, characterized in that: The preset suspension height of the shock absorber upper end cover relative to the shock absorber bottom plate is 75 mm.

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