Track, track structure, seat assembly and vehicle

Abstract

A track, a track structure, a seat assembly and a vehicle. The track is adapted to be used as a first track of the track structure. An accommodating cavity with an opening is provided in the track. The track is further provided with a stopping surface, wherein the stopping surface is configured to stop a first rolling body of the track structure, and the first rolling body is a rolling body arranged in the accommodating cavity on the side close to the opening; and the stopping surface is configured to be capable of being in contact with the first rolling body, and is provided with at least a first point configured to be in contact with the first rolling body, the first point is adapted to be arranged on the side closer to the opening than a second point, the second point is the highest point of the first rolling body, and the height of the first point is adapted to be lower than the height of the second point.

Description

Tracks, track structures, seat assemblies and vehicles

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This disclosure claims priority to Chinese patent application number 202322692844.4, filed with the Patent Office of China on September 28, 2023, entitled “Track, Track Structure, Seat Assembly and Vehicle,” the entire contents of which are incorporated by reference into this disclosure. Technical Field

[0003] The present disclosure relates to the technical field of vehicle components, and in particular, to a track, a track structure, a seat assembly, and a vehicle. Background Art

[0004] As a key component of a car seat, the car seat track serves as a fastening, adjustment, and locking mechanism. It typically consists of an upper track, a lower track, and a roller. The lower track can be fixed to the cabin floor, while the upper track is fixed to the underside of the seat. The upper and lower tracks are slidably connected via the roller to adjust the seat position. However, prior art seat track designs have low peel strength, failing to meet design requirements.

[0005] Summary of the Invention

[0006] The purpose of the present disclosure is to provide a track, a track structure, a seat assembly and a vehicle, so as to at least partially solve the technical problems existing in the related art.

[0007] In order to achieve the above object, according to a first aspect of the present disclosure, a track is provided, wherein the track is suitable for being used as a first track of a track structure, and a cavity with an opening is provided on the track;

[0008] The track is further provided with a stop surface, and the stop surface is used to stop a first rolling body of the track structure, wherein the first rolling body is a rolling body provided in the cavity and close to a side of the opening;

[0009] The stop surface is configured to be able to contact the first rolling element, and the stop surface has at least a first point for contacting the first rolling element, wherein the first point is adapted to be arranged on a side closer to the opening than a second point;

[0010] The second point is the highest point of the first rolling element, and the height of the first point is suitable to be lower than the height of the second point.

[0011] Optionally, the stop surface has a tangent at the first point, and the height of the intersection of the tangent and the perpendicular line at the second point is higher than the first point.

[0012] Optionally, the stop surface is configured as an inclined plane, and has a first end and a second end opposite to each other, wherein in the width direction of the track, the second end is closer to the opening than the first end, and the second end is closer to a side of the cavity away from the opening than the first end;

[0013] Wherein, the included angle α between the stop surface and the width direction of the track is 5° to 10°.

[0014] Optionally, the track further includes a first arcuate surface for contacting the first rolling body, and the shape of the first arcuate surface is adapted to the shape of the first rolling body; the first arcuate surface is connected to an end of the stop surface away from the opening.

[0015] Optionally, the first arc-shaped surface is configured as a first circular arc-shaped surface.

[0016] Optionally, the track includes a first main body portion, a pair of first sidewall portions and a pair of stop portions.

[0017] One ends of the pair of first side walls are respectively arranged at two ends of the first main body in the width direction of the track, and the pair of stoppers are connected to the other ends of the corresponding first side walls;

[0018] The first main body, the first side wall and the stopper together define the cavity, and the gap between a pair of the stoppers forms the opening;

[0019] The stopper portion at least includes a first portion arranged obliquely, a first end of the first portion is connected to the first side wall portion, and a second end of the first portion extends toward the first main body portion;

[0020] The inner wall of the first part is provided with the stopping surface.

[0021] Optionally, the position where the first side wall portion is connected to the first part transitions smoothly to construct a first arcuate surface suitable for contacting the first rolling element.

[0022] Optionally, the stopping portion further includes a second portion, the second portion being connected to the second end of the first portion and extending close to the first main portion in a direction perpendicular to the first main portion.

[0023] Optionally, the track further includes a third arcuate surface adapted to contact the second rolling element in the track structure, the third arcuate surface being located on a side of the cavity away from the opening, and the third arcuate surface being adapted to the shape of the second rolling element;

[0024] Wherein, the second rolling body is a rolling body located on a side of the cavity away from the opening.

[0025] Optionally, the track further includes at least one pair of first limiting portions, the at least one pair of first limiting portions including a pair of first limiting portions located at both ends of the length direction of the track, and the first limiting portions are used to limit the position of the second rolling body in the length direction of the track.

[0026] According to a second aspect of the present disclosure, there is provided a track structure, comprising the track as described above, the track serving as a first track of the track structure;

[0027] a second track, at least a portion of which is slidably disposed in the cavity along a length direction of the track; and

[0028] The first rolling body is arranged between the track and the second track and is located on a side of the cavity close to the opening.

[0029] Optionally, the track includes a first arcuate surface, and the shape of the first arcuate surface is adapted to the shape of the first rolling element;

[0030] The second track further includes a second arcuate surface in contact with the first rolling body, and the shape of the second arcuate surface is adapted to the shape of the first rolling body;

[0031] The first rolling element is clamped between the first arcuate surface and the second arcuate surface.

[0032] Optionally, the first arc-shaped surface and the second arc-shaped surface are both first circular arc-shaped surfaces.

[0033] Optionally, the first rolling element is a first ball, the radius of the first arc-shaped surface is R1, the radius of the first ball is R2, and R1 and R2 satisfy R1≥1.2R2.

[0034] Optionally, the track structure further includes a second rolling body, and the second rolling body is located on a side of the cavity away from the opening;

[0035] The track further includes a third arcuate surface,

[0036] The second track further includes a fourth arcuate surface;

[0037] The second rolling element is clamped between the third arcuate surface and the fourth arcuate surface.

[0038] Optionally, the third arcuate surface and the fourth arcuate surface are both second circular arcuate surfaces, the first rolling body is a first ball, and the second rolling body is a second ball;

[0039] The radius of the second rolling ball is greater than the radius of the first rolling ball.

[0040] Optionally, the radius of the second arc-shaped surface is R3, the radius of the second ball is R4, and R3 and R4 satisfy R3≥1.2R4.

[0041] Optionally, the second track further includes at least one pair of second limiting portions, the at least one pair of second limiting portions including a pair of second limiting portions located at both ends of the length direction of the second track, and the second limiting portions are used to limit the position of the first rolling body in the length direction of the second track.

[0042] According to a third aspect of the present disclosure, a seat assembly is provided, comprising a seat and the track structure described above.

[0043] According to a fourth aspect of the present disclosure, a vehicle is provided, comprising the seat assembly as described above or the track structure as described above.

[0044] Through the above technical solution, the stop surface can be used to directly improve the peeling strength of the track structure, and other reinforcements do not need to be used to improve the peeling strength of the track structure. While improving the peeling strength of the track structure, it is beneficial to reduce the number of components in the track structure, simplify the track structure, and effectively save the production and manufacturing costs generated by the use of other reinforcements.

[0045] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] FIG1 is a side view of a track structure provided by an exemplary embodiment of the present disclosure along the length direction of a first track or a second track, wherein a rolling element support is not shown.

[0047] 2 is a side view of the second track in the track structure provided by an exemplary embodiment of the present disclosure along its length direction, wherein the first rolling body and the second rolling body are shown, and the first rolling body and the second rolling body are indicated by dotted lines.

[0048] 3 is a side view of a first track along its length direction in a track structure provided by an exemplary embodiment of the present disclosure, wherein a first rolling body and a second rolling body are shown, and the first rolling body and the second rolling body are indicated by dotted lines.

[0049] FIG4 is a side view of a track structure provided by an exemplary embodiment of the present disclosure along the length direction of the first track or the second track, wherein a rolling element support is shown.

[0050] FIG. 5 is an enlarged view of A in FIG. 4 .

[0051] FIG6 is a schematic structural block diagram of a seat assembly provided by an exemplary embodiment of the present disclosure.

[0052] FIG7 is a schematic structural block diagram of a vehicle provided by an exemplary embodiment of the present disclosure. DETAILED DESCRIPTION

[0053] The following describes the specific embodiments of the present disclosure in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure and are not intended to limit the present disclosure.

[0054] In the present disclosure, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "left", "right", etc. are defined based on the drawing directions shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, and a specific orientation structure and operation, and therefore cannot be understood as a limitation of the present disclosure. The terms "inside and outside" refer to the inside and outside of the corresponding structural contours. The length direction is the length direction of the track (the first track or the second track 2), for example, it can be the length direction of the vehicle, and the width direction is the width direction of the track (the first track or the second track 2), for example, it can be the width direction of the vehicle. In addition, the terms used, such as "first, second", etc., are to distinguish one element from another, and do not have sequentiality and importance.

[0055] It should also be noted that, in the description of this disclosure, unless otherwise expressly specified or limited, the terms "disposed," "connected," "connected," and "installed" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; and they may refer to direct connections or indirect connections via an intermediary. Those skilled in the art will understand the specific meanings of these terms in this disclosure based on specific circumstances.

[0056] In the present disclosure, the peel strength of the track structure 100 refers to the amount of force required to apply force to the upper rail so that the upper rail tends to separate from the lower rail and the lower rail deforms under the force until the upper rail separates from the lower rail.

[0057] As mentioned above, the peeling strength of the seat track in the related art is low. The study found that the reason for the low peeling strength of the seat track in the related art is that in the related art, the plane above the upper track that contacts the ball is a horizontal plane, and the force that the lower track can withstand in the vertical direction is small, which causes the upper track to easily fall off from the lower track or easily cause the track to deform, resulting in low peeling strength of the track.

[0058] In view of this, according to the first aspect of the present disclosure, as shown in Figures 1 to 7, a track 1 is provided, which is suitable for being used as the first track of a track structure 100. The track 1 is provided with a cavity 11 with an opening 111. The track 1 is also provided with a stop surface 12. The stop surface 12 is used to stop the first rolling body 31 of the track structure 100, wherein the first rolling body 31 is a rolling body provided in the cavity 11 and close to the side of the opening 111. The stop surface 12 is configured to be able to contact the first rolling body 31. The stop surface 12 has at least a portion for contacting the first rolling body. 31, the first point 311 is suitable for being arranged on a side close to the opening 111 relative to the second point 312 (such as the upper side of the drawing direction of the cavity 11 in Figure 1), wherein the second point 312 is the highest point of the first rolling body 31, and the height of the first point 311 is suitable for being lower than the height of the second point 312. In other words, the stop surface 12 can have a contact vertex located lower than the second point 312, and when the contact vertex contacts the first rolling body 31, the force acting on the position of the contact vertex is at an angle to the height direction of the slide rail (such as the up and down direction of the drawing in Figure 1).

[0059] Here, it should be noted that when the track 1 is used as the first track of the track structure 100, the second track 2 of the track structure 100 can be assembled on the track 1 through the opening 111 of the cavity 11. Since the first rolling body 31 is arranged between the track 1 and the second track 2 and close to the side of the opening 111 of the cavity 11, the track 1 can support the second track 2 through the first rolling body 31, and the second track 2 and the track 1 can form a sliding fit, so that the second track 2 can slide along the length direction of the track 1.

[0060] Furthermore, because track 1 includes a stop surface 12 capable of contacting first rolling element 31, when second track 2 is subjected to an external force that tends to cause it to separate from track 1 (e.g., external force F in FIG. 1 ), first rolling element 31 compresses track 1's stop surface 12 under the action of the external force. At least at first point 311, the external force exerted by first rolling element 31 on track 1 also has a certain inclination angle. According to the principle of force decomposition, the external force acting on track 1 can be decomposed into a first force component (e.g., F1 in FIG. 1 ) and a second force component (e.g., F2 in FIG. 1 ). The first force component acts on track 1 along the width of track 1, and the second force component acts on track 1 in a direction that causes second track 2 to separate from track 1 (i.e., the height of track 1 or second track 2, i.e., the vertical direction in FIG. 1 ). According to the quadrilateral principle of force, the second force component F2 exerted by first rolling element 31 on track 1 is smaller than the external force F.

[0061] Based on this, the stop surface 12 can be used to reduce the force exerted on the track 1 in the peeling direction of the second track 2, effectively avoiding the situation where the track 1 is deformed due to excessive force in the vertical direction, resulting in the second track 2 being detached from the track 1, thereby improving the peeling strength of the track structure 100.

[0062] In summary, when the track 1 is used as the first track of the track structure 100, the stop surface 12 can be used to directly improve the peel strength of the track structure 100, and other reinforcements do not need to be used to improve the peel strength of the track structure 100. While improving the peel strength of the track structure 100, it is beneficial to reduce the number of components in the track structure 100, simplify the track structure 100, and effectively save the production and manufacturing costs generated by the use of other reinforcements.

[0063] The present disclosure does not limit the specific shape of the stop surface 12. As an embodiment of the present disclosure, as shown in Figures 4 and 5, the stop surface 12 has a tangent line 18 at a first point 311. The intersection 19 of the tangent line 18 and the perpendicular line 20 at the second point 312 is higher than the first point 311. This ensures that the stop surface 12 always has a position suitable for obliquely abutting the first rolling element 31.

[0064] Optionally, the stop surface 12 may be a plane or a curved surface, as long as the stop surface 12 has the first point 311 described above, thereby improving the peeling strength of the track structure 100 .

[0065] As an embodiment of the present disclosure, the above-mentioned stop surface 12 is constructed as an inclined plane, and the stop surface 12 has a first end 121 and a second end 122 relative to each other. In the width direction of the track 1, the second end 122 is closer to the opening 111 than the first end 121, and the second end 122 is closer to the side of the cavity 11 away from the opening 111 than the first end 121, wherein the angle α between the stop surface 12 and the width direction of the track 1 is 5° to 10°. Since the second end 122 of the stop surface 12 is closer to the opening 111 than the first end 121, and the second end 122 is closer to the side of the cavity 11 away from the opening 111 than the first end 121, that is, the second end 122 of the stop surface 12 is inclined downward (that is, in the up and down direction of the drawing of FIG. 1 ), that is, the height of the second end 122 of the stop surface 12 is lower than the height of the first end 121. Moreover, since the angle α between the stop surface 12 and the width direction of the track 1 is greater than or equal to 5°, the force F exerted by the first rolling body 31 and / or the second track 2 on the track 1 has a certain inclination angle, which can reduce the force borne by the track 1 in the vertical direction, and effectively avoid the situation where the peeling strength of the track structure 100 is not greatly improved due to the small inclination angle of the stop surface 12.

[0066] In addition, since the angle α between the stop surface 12 and the width direction of the track 1 is less than or equal to 10°, the inclination angle of the stop surface 12 will not be too large, which effectively avoids the situation where the inclination angle of the stop surface 12 is too large, causing mechanical interference between the track 1 and the second track 2, resulting in the second track 2 being unable to slide on the track 1.

[0067] In order to reduce the friction between the first rolling element 31 and the track 1, the track 1 optionally further includes a first curved surface 13 for contacting the first rolling element 31. The shape of the first curved surface 13 matches the shape of the first rolling element 31, and the first curved surface 13 is connected to the end of the stop surface 12 away from the opening 111. Since the shape of the first curved surface 13 matches the shape of the first rolling element 31, when the second track 2 slides on the track 1, the first rolling element 31 can roll on the track 1, and rolling contact can be formed between the first rolling element 31 and the track 1. The friction between the first rolling element 31 and the track 1 is relatively small, effectively avoiding the situation where the friction between the first rolling element 31 and the track 1 is relatively large and the first rolling element 31 and / or the track 1 are easily worn, thereby increasing the service life of the first rolling element 31 and / or the track 1.

[0068] In addition, since the first curved surface 13 is connected to the end of the stop surface 12 away from the opening 111, when the first rolling body 31 squeezes the track 1, it can ensure that the force from the first rolling body 31 can act on the inclined stop surface 12, and be decomposed into a first component of force acting on the track 1 along the width direction of the track 1 (such as F1 in Figure 1) and a second component of force acting on the track 1 in the direction of causing the second track 2 to peel off the track 1 (F2 in Figure 1), which can reduce the force acting on the track 1 in the direction of causing the second track 2 to peel off the track 1, thereby improving the peeling strength of the rolling structure.

[0069] Here, the present disclosure does not limit the specific shape of the first arcuate surface 13. As an embodiment of the present disclosure, the first arcuate surface 13 can be configured as a first circular arc surface.

[0070] In order to ensure that the track 1 and the second track 2 can form a sliding fit, optionally, there can be a plurality of first rolling bodies 31 , and the plurality of first rolling bodies 31 are spaced apart along the length direction of the track 1 .

[0071] The present disclosure does not limit the specific structure of the track 1, as long as the second track 2 can slide on the track 1 along the length direction of the track 1. As an embodiment of the present disclosure, as shown in Figures 1 and 2, the track 1 includes a first main body 14, a pair of first side walls 15 and a pair of stop parts 16, one end of the pair of first side walls 15 is respectively arranged at the two ends of the first main body 14 in the width direction of the track 1, and the pair of stop parts 16 are connected to the other end of the corresponding first side wall parts 15. The first main body 14, the first side wall part 15 and the stop part 16 jointly define the accommodating cavity 11, and the gap between the pair of stop parts 16 constitutes an opening 111, wherein the stop part 16 at least includes an inclined first part 161, the first end of the first part 161 is connected to the first side wall part 15, the second end of the first part 161 extends in a direction close to the first main body 14, and the inner wall of the first part 161 is provided with a stop surface 12. That is to say, the track 1 is symmetrical along its own width direction, and its shape is roughly "concave"-shaped. The inner surface of the first part 161 of the inclined stop portion 16 is constructed as the stop surface 12, and a pair of first side wall portions 15 are respectively located on both sides of the first main body portion 14 and connected to the first main body portion 14.

[0072] In the above-mentioned track 1, it can be understood that the angle between the first side wall portion 15 and the first main body portion 14 can be any angle greater than 0° and less than 180°. As an embodiment of the present disclosure, as shown in Figure 2, the two first side wall portions 15 can extend in a direction perpendicular to the first main body portion 14.

[0073] Optionally, as shown in FIG. 1 and FIG. 2 , the position where the first side wall portion 15 connects to the first portion 161 transitions smoothly to construct a first arcuate surface 13 suitable for contacting the first rolling element 31 .

[0074] In order to further improve the peel strength of the track structure 100, optionally, as shown in Figure 3, the stop portion 16 may also include a second part 162, which is connected to the second end of the first part 161 and extends close to the first main body portion 14 in a direction perpendicular to the first main body portion 14. In this way, the first part 161 and the second part 162 of the stop portion 16 can be formed into an L-shaped structure, and the first rolling body 31 and the part of the second track 2 can be limited in the "n"-shaped space surrounded by the stop portion 16 and the first side wall portion 15.

[0075] To prevent the first rolling element 31 from falling out of the track 1 or the second track 2, the track structure 100 optionally further includes at least one pair of first limiting portions 41, as shown in Figures 1 and 2. The at least one pair of first limiting portions 41 includes a pair of first limiting portions 41 located at both ends of the lengthwise direction of the second track 2. The first limiting portions 41 are used to limit the position of the first rolling element 31 in the lengthwise direction of the second track 2. In this way, the first limiting portions 41 can abut against the first rolling element 31, effectively preventing the first rolling element 31 from falling out of the track 1 or the second track 2, which could cause the track structure 100 to fail to function normally.

[0076] According to a second aspect of the present disclosure, a track structure 100 is provided. The track structure 100 includes the track 1, the second track 2, and the first rolling element 31 described above. The track 1 serves as the first track of the track 1 structure. At least a portion of the second track 2 (such as a portion of the second sidewall portion 24 described below) is slidably disposed in the cavity 11 along the length of the track 1. The first rolling element 31 is disposed between the track 1 and the second track 2 and is located on a side of the cavity 11 near the opening 111. In other words, the first rolling element 31 is clamped between the track 1 and the second track 2, and the second track 2 is able to reciprocate along the length of the track 1.

[0077] To reduce friction between the first rolling element 31 and the second rail 2, as shown in Figures 1 and 2, the rail 1 optionally includes a first curved surface 13 whose shape matches that of the first rolling element 31. The second rail 2 also includes a second curved surface 21 that contacts the first rolling element 31. The shape of the second curved surface 21 matches that of the first rolling element 31, with the first rolling element 31 being sandwiched between the first curved surface 13 and the second curved surface 21. Because the shape of the second curved surface 21 matches that of the first rolling element 31, when the second rail 2 slides on the rail 1, the first rolling element 31 can roll on the second rail 2, forming rolling contact between the first rolling element 31 and the second rail 2. This reduces friction between the first rolling element 31 and the second rail 2, effectively preventing wear of the first rolling element 31 and / or the second rail 2 due to high friction between the first rolling element 31 and the second rail 2, and thereby improving the service life of the first rolling element 31 and / or the second rail 2.

[0078] Furthermore, because the first rolling element 31 is in rolling contact with both the track 1 and the second track 2, and the first rolling element 31 is clamped between the first curved surface 13 and the second curved surface 21, the first curved surface 13 and the second curved surface 21 can abut against the first rolling element 31. This allows the first rolling element 31 to be positioned relatively stable between the track 1 and the second track 2, effectively preventing forces on the track 1 and / or the second track 2 that could cause the track 1 and / or the second track 2 to shift or misalign. Furthermore, the friction between the first rolling element 31 and the track 1 and the second track 2 is relatively low, allowing the second track 2 to slide smoothly on the track 1.

[0079] The present disclosure does not limit the specific shapes of the first arcuate surface 13 and the second arcuate surface 21. As an embodiment of the present disclosure, as shown in FIG1 and FIG2 , the first arcuate surface 13 and the second arcuate surface 21 are both first circular arc surfaces.

[0080] Here, the present disclosure does not limit the specific shape of the first rolling body 31. Optionally, as shown in Figures 1 and 2, the first rolling body 31 is a first ball. For the embodiment in which the first curved surface 13 and the second curved surface 21 are both first circular arc surfaces, since the first rolling body 31 is a first ball, the first rolling body 31 and the first curved surface 13, as well as the first rolling body 31 and the second curved surface 21 can form reliable surface-to-surface contact, thereby increasing the contact area between the first rolling body 31 and the first curved surface 13, and between the first rolling body 31 and the second curved surface 21, thereby reducing the contact stress between the first rolling body 31 and the track 1 and the second track 2, effectively avoiding the situation in which the first rolling body 31, the first curved surface 13 and the second curved surface 21 are easily worn due to the point contact between the first rolling body 31 and the first curved surface 13 and the second curved surface 21, thereby improving the service life and comfort of the track structure 100.

[0081] The present disclosure does not limit the radius of the first ball and the first arcuate surface. As an embodiment of the present disclosure, the radius of the first arcuate surface is greater than the radius of the first ball. In this way, when the first rolling body 31 rolls between the first arcuate surface 13 and the second arcuate surface 21, a gap can exist between the first rolling body 31 and the first arcuate surface 13 and the second arcuate surface 21, and the first rolling body 31 can roll between the first arcuate surface 13 and the second arcuate surface 21, so that the angle and / or position of the first rolling body 31 can be adjusted between the first arcuate surface 13 and the second arcuate surface 21.

[0082] In addition, the above-mentioned gap can also compensate for the manufacturing and / or assembly errors of the track 1 and / or the second track 2, effectively avoiding the situation where the first rolling body 31 cannot roll between the track 1 and the second track 2 due to errors in the track 1 and / or the second track 2.

[0083] Optionally, the radius of the first arcuate surface is R1, the radius of the first ball is R2, and R1 and R2 satisfy R1≥1.2R2. In this way, the contact area between the first arcuate surface 13 and the second arcuate surface 21 and the first rolling element 31 is large.

[0084] In order to improve the load-bearing capacity and smoothness of movement of the track structure 100, as shown in Figure 1, the track structure 100 may further include a second rolling body 32. The second rolling body 32 is located on the side of the cavity 11 away from the opening 111. The track 1 also includes a third curved surface 17, and the second track 2 also includes a fourth curved surface 22. The second rolling body 32 is clamped between the third curved surface 17 and the fourth curved surface 22. In other words, the second rolling body 32 is located on the side of the first rolling body 31 away from the stop surface 12, and the first rolling body 31 and the second rolling body 32 are spaced apart in the vertical direction. Since the track structure 100 also includes the second rolling body 32, the second rolling body 32 can also bear the force acting on the track 1 and the second track 2, which can increase the load-bearing capacity of the track structure 100 and, to a certain extent, increase the smoothness of the movement of the second track 2 in the track 1.

[0085] Moreover, since the third curved surface 17 is adapted to the shape of the second rolling element 32, when the second track 2 slides on the track 1, the second rolling element 32 can roll on the track 1 and the second track 2, and rolling contact can be formed between the second rolling element 32 and the track 1 and the second track 2. The friction between the second rolling element 32 and the track 1, and the second rolling element 32 and the second track 2 is small, and the second track 2 slides smoothly on the track 1, effectively avoiding the situation where the second rolling element 32, the track 1 and the second track 2 are easily worn due to the large friction between the second rolling element 32 and the track 1 and the second track 2, thereby improving the service life of the second rolling element 32, the track 1 and the second track 2.

[0086] In addition, since rolling contact is formed between the second rolling body 32 and both the track 1 and the second track 2, and the second rolling body 32 is clamped between the third curved surface 17 and the fourth curved surface 22, the third curved surface 17 and the fourth curved surface 22 can abut against each other with the second rolling body 32, the position of the second rolling body 32 between the track 1 and the second track 2 is relatively stable, effectively avoiding the occurrence of force displacement and / or misalignment of the track 1 and / or the second track 2.

[0087] In order to further ensure that the track 1 and the second track 2 can form a sliding fit, optionally, the number of the second rolling elements 32 can be multiple, and the multiple second rolling elements 32 are spaced apart along the length direction of the track 1.

[0088] Here, the present disclosure does not limit the specific structure of the second track 2, as long as the second track 2 can slide on the track 1 along the length direction of the track 1. As an embodiment of the present disclosure, as shown in Figures 1 and 3, the second track 2 includes a second main body 23 and a pair of second side wall portions 24, wherein one end of the pair of second side wall portions 24 is respectively provided at both ends of the second main body 23 in the width direction of the second track 2, the second curved surface 21 is located at the end of the second side wall portion 24 away from the first main body portion 14, and the fourth curved surface 22 is located at the end of the second side wall portion 24 close to the first main body portion 14. In other words, the second track 2 is symmetrical along its own width direction, and its shape can be roughly in the shape of a "J". One end of the second side wall portion 24 is bent to form the second curved surface 21, and the other end of the second side wall portion 24 is bent to form the fourth curved surface 22.

[0089] As shown in Figure 1, for an embodiment in which the second rail 2 is slidably arranged in the accommodating cavity 11 along the length direction of the rail 1, a portion of the second side wall portion 24 away from the first main body portion 14 can be located in the above-mentioned "n"-shaped space defined by the first side wall portion 15 and the stop portion 16, and the second main body portion 23 of the second rail 2 can be exposed in the above-mentioned opening 111.

[0090] The present disclosure does not limit the specific shapes of the third curved surface 17 and the fourth curved surface 22. As an embodiment of the present disclosure, as shown in Figures 1 and 3, optionally, the third curved surface 17 and the fourth curved surface 22 are both second circular arc surfaces, and the second rolling element 32 is a second ball. In this way, reliable surface-to-surface contact can be formed between the second rolling element 32 and the third curved surface 17, and between the second rolling element 32 and the fourth curved surface 22, thereby increasing the contact area between the second rolling element 32 and the third curved surface 17, and between the second rolling element 32 and the fourth curved surface 22, reducing the contact stress between the second rolling element 32 and the track 1 and / or the second track 2, and effectively avoiding the situation where the second rolling element 32 and the third curved surface 17 and the fourth curved surface 22 are easily worn due to the high contact stress caused by the point contact between the second rolling element 32 and the third curved surface 17 and the fourth curved surface 22, thereby improving the service life and comfort of the track structure 100.

[0091] To reduce the friction between the second rolling element 32 and the track 1, the track 1 optionally further includes a third curved surface 17 adapted to contact the second rolling element 32 in the track 1 structure, as shown in Figures 1 and 2. The third curved surface 17 is located on the side of the cavity 11 away from the opening 111, and the third curved surface 17 matches the shape of the second rolling element 32. The second rolling element 32 is located on the side of the cavity 11 away from the opening 111. Because the shape of the third curved surface 17 matches the shape of the second rolling element 32, when the second track 2 slides on the track 1, the second rolling element 32 can roll on the track 1, and rolling contact can be formed between the first rolling element 31 and the track 1. The friction between the first rolling element 31 and the track 1 is reduced, effectively avoiding the situation where the friction between the first rolling element 31 and the track 1 is high and the first rolling element 31 and / or the track 1 are easily worn, thereby increasing the service life of the first rolling element 31 and / or the track 1.

[0092] Here, the present disclosure does not limit the radius of the second ball and the second arcuate surface 21. As an embodiment of the present disclosure, the radius of the second arcuate surface is greater than the radius of the second ball. In this way, when the second rolling element 32 rolls between the third arcuate surface 17 and the fourth arcuate surface 22, a gap can exist between the second rolling element 32 and both the third arcuate surface 17 and the fourth arcuate surface 22. The second rolling element 32 can roll between the third arcuate surface 17 and the fourth arcuate surface 22, thereby allowing the second rolling element 32 to adjust its angle and / or position between the third arcuate surface 17 and the fourth arcuate surface 22.

[0093] In addition, the above gap can also compensate for the manufacturing errors of the track 1 and / or the second track 2, effectively avoiding the situation where the second rolling body 32 cannot roll between the track 1 and the second track 2 due to errors in the track 1 and / or the second track 2.

[0094] Optionally, the radius of the second arc-shaped surface is R3, the radius of the second ball is R4, and R3 and R4 satisfy R3≥1.2R4.

[0095] The present disclosure does not limit the radius of the first ball and the radius of the second ball. The radius of the first ball can be equal to or different from the radius of the second ball, as long as the first ball and the second ball can enable the second track 2 to slide on the track 1. As an embodiment of the present disclosure, the radius of the second ball is greater than the radius of the first ball. In this way, the second ball can withstand a larger load, further improving the load-bearing capacity of the track structure 100.

[0096] To prevent the second rolling element 32 from falling out of the track 1 or the second track 2, the track structure 100 optionally further includes at least one pair of second limiting portions 42, as shown in Figures 1 and 3. The at least one pair of second limiting portions 42 includes a pair of second limiting portions 42 located at both ends of the lengthwise direction of the second track 2. The second limiting portions 42 are used to limit the position of the second rolling element 32 in the lengthwise direction of the second track 2. In this way, the second limiting portions 42 can abut against the first rolling element 31, effectively preventing the second rolling element 32 from falling out of the track 1 or the second track 2, which could prevent the track structure 100 from being properly used.

[0097] Furthermore, when the second rail 2 slides on the rail 1 along the length direction of the rail 1 to the extreme position, the first limit portion 41 located on the rail 1 and the second limit portion 42 located on the second rail 2 can simultaneously abut against the rolling assembly 3 (see below), and the second rail 2 cannot continue to slide on the rail 1, and the second rail 2 will not fall off from the rail 1 along the length direction of the rail 1.

[0098] In the present disclosure, as shown in FIG. 4 , the track structure 100 may further include a rolling element support 33 , and a first rolling element 31 and a second rolling element 32 are respectively mounted at two ends of the rolling element support 33 .

[0099] The rolling element support 33 , the first rolling element 31 , and the second rolling element 32 can together form the above-mentioned rolling assembly 3 .

[0100] According to a third aspect of the present disclosure, as shown in FIG. 6 , a seat assembly 200 is provided, including a seat 201 and the track structure 100 as described above, wherein the seat 201 is mounted on the track structure 100 .

[0101] During installation, the track 1 can be installed on the base plate for installing the track structure 100, and the seat 201 can be installed on the second track 2. The second track 2 is fixedly connected to the bottom surface of the seat 201. The second track 2 can drive the seat 201 to slide on the track 1 to achieve position adjustment of the seat 201.

[0102] In addition, since the track structure 100 has a relatively high peeling strength and the seat 201 is mounted on the track structure 100 , the overall peeling strength of the seat 201 is relatively high.

[0103] It should be noted here that, in the present disclosure, the application object of the track structure 100 is not limited, and it can be any device suitable for adopting the track structure 100. For example, the track structure 100 can be used in a vehicle 1000, and can also be used in other devices suitable for adopting the above-mentioned track structure 100.

[0104] According to a fourth aspect of the present disclosure, as shown in FIG7 , a vehicle 1000 is provided, comprising the seat assembly 200 or the track structure 100 as described above.

[0105] Here, it can be understood that the track structure 100 can be a track of the seat 201 of the vehicle 1000 , or can be other components of the vehicle 1000 to which the track structure 100 can be applied.

[0106] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the scope of protection of the present disclosure.

[0107] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0108] In addition, the various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A track (1), characterized in that: The track (1) is suitable for being used as a first track of a track structure (100), and a cavity (11) with an opening (111) is provided on the track (1); The track (1) is further provided with a stop surface (12), and the stop surface (12) is used to stop a first rolling body (31) of the track structure (100), wherein the first rolling body (31) is a rolling body arranged in the cavity (11) and close to a side of the opening (111); The stop surface (12) is configured to be able to contact the first rolling body (31), and the stop surface (12) has at least a first point (311) for contacting the first rolling body (31), and the first point (311) is suitable for being arranged on a side close to the opening (111) relative to the second point (312); The second point (312) is the highest point of the first rolling body (31), and the height of the first point (311) is suitable to be lower than the height of the second point (312).

2. The track (1) according to claim 1, characterized in that The stop surface (12) has a tangent (18) at the first point (311), and the height of the intersection point (19) of the tangent (18) and the vertical line (20) at which the second point (312) is located is higher than that of the first point (311).

3. The track (1) according to claim 1 or 2, characterized in that The stop surface (12) is configured as an inclined plane, and the stop surface (12) has a first end (121) and a second end (122) opposite to each other, and in the width direction of the track (1), the second end (122) is closer to the opening (111) than the first end (121), and the second end (122) is closer to a side of the cavity (11) away from the opening (111) than the first end (121); The included angle α between the stop surface (12) and the width direction of the track (1) is 5° to 10°.

4. The track (1) according to any one of claims 1 to 3, characterized in that The track (1) further comprises a first arcuate surface (13) for contacting the first rolling body (31), and the shape of the first arcuate surface (13) is adapted to the shape of the first rolling body (31); The first arc-shaped surface (13) is connected to an end of the stop surface (12) away from the opening (111).

5. The track (1) according to claim 4, characterized in that The first arcuate surface (13) is configured as a first circular arc surface.

6. The track (1) according to any one of claims 1 to 5, characterized in that The track (1) comprises a first main body portion (14), a pair of first side wall portions (15) and a pair of stop portions (16). One ends of the pair of first side wall portions (15) are respectively arranged at two ends of the first main body portion (14) in the width direction of the track (1), and the pair of stopper portions (16) are connected to the other ends of the corresponding first side wall portions (15); The first main body portion (14), the first side wall portion (15) and the stopper portion (16) jointly define the housing cavity (11), and a gap between a pair of the stopper portions (16) forms the opening (111); The stopper portion (16) at least comprises a first portion (161) arranged obliquely, a first end of the first portion (161) is connected to the first side wall portion (15), and a second end of the first portion (161) extends in a direction close to the first main body portion (14); The inner wall of the first part (161) is provided with the stop surface (12).

7. The track (1) according to claim 6, characterized in that The position where the first side wall portion (15) is connected to the first portion (161) is smoothly transitioned to construct a first arcuate surface (13) suitable for contacting the first rolling body (31).

8. Track (1) according to claim 6 or 7, characterized in that The stopper portion (16) further comprises a second portion (162), wherein the second portion (162) is connected to the second end of the first portion (161) and extends close to the first main portion (14) in a direction perpendicular to the first main portion (14).

9. The track (1) according to any one of claims 1 to 8, characterized in that The track (1) further comprises a third arcuate surface (17) adapted to contact a second rolling body (32) in the track structure (100); the third arcuate surface (17) is located on a side of the cavity (11) away from the opening (111); the third arcuate surface (17) is adapted to the shape of the second rolling body (32); Wherein, the second rolling body (32) is a rolling body located on a side of the cavity (11) away from the opening (111).

10. Track (1) according to claim 9, characterized in that The track (1) further comprises at least one pair of first limiting portions (41), wherein the at least one pair of first limiting portions (41) comprises a pair of first limiting portions (41) located at both ends of the length direction of the track (1), and the first limiting portions (41) are used to limit the position of the first rolling body (31) in the length direction of the track (1).

11. A track structure (100), characterized in that: The track structure (100) comprises a track (1) according to any one of claims 1 to 10, the track (1) being used as a first track of the track structure (100); a second track (2), at least a portion of which is slidably disposed in the housing cavity (11) along the length direction of the track (1); and The first rolling body (31) is arranged between the track (1) and the second track (2), and is located on a side of the cavity (11) close to the opening (111).

12. The track structure (100) according to claim 11, characterized in that: The track (1) comprises a first arcuate surface (13), the shape of the first arcuate surface (13) being adapted to the shape of the first rolling body (31); The second track (2) further comprises a second arcuate surface (21) in contact with the first rolling body (31), and the shape of the second arcuate surface (21) is adapted to the shape of the first rolling body (31); The first rolling element (31) is clamped between the first arcuate surface (13) and the second arcuate surface (21).

13. The track structure (100) according to claim 12, characterized in that: The first arc-shaped surface (13) and the second arc-shaped surface (21) are both first circular arc-shaped surfaces.

14. The track structure (100) according to claim 13, characterized in that: The first rolling body (31) is a first ball, the radius of the first arc-shaped surface is R1, the radius of the first ball is R2, and R1 and R2 satisfy R1≥1.2R2.

15. The track structure (100) according to any one of claims 11 to 14, characterized in that: The track structure (100) further comprises a second rolling body (32), wherein the second rolling body (32) is located on a side of the cavity (11) away from the opening (111); The track (1) further comprises a third arcuate surface (17), The second track (2) further includes a fourth arcuate surface (22); The second rolling element (32) is clamped between the third arcuate surface (17) and the fourth arcuate surface (22).

16. The track structure (100) according to claim 15, characterized in that: The third arc surface (17) and the fourth arc surface (22) are both second arc surfaces, the first rolling body (31) is a first ball, and the second rolling body (32) is a second ball; The radius of the second rolling ball is greater than the radius of the first rolling ball.

17. The track structure (100) according to claim 16, characterized in that: The radius of the second arc-shaped surface is R3, the radius of the second ball is R4, and R3 and R4 satisfy R3≥1.2R4.

18. The track structure (100) according to any one of claims 15 to 17, characterized in that: The second track (2) further comprises at least one pair of second limiting portions (42); The at least one pair of second limiting portions (42) includes a pair of second limiting portions (42) located at two ends of the second track (2) in the length direction; The second limiting portion (42) is used to limit the position of the second rolling body (32) in the length direction of the second track (2).

19. A seat assembly (200), characterized in that: The invention comprises a seat (201) and a track structure (100) according to any one of claims 11 to 18.

20. A vehicle (1000), characterized in that: The invention comprises the seat assembly (200) according to claim 19 or the track structure (100) according to any one of claims 11-18.

Images