Seat assembly, electric sliding rail and lower rail assembly

Abstract

The invention discloses a seat assembly, an electric sliding rail and a lower rail assembly, the seat assembly comprises a lower rail and a buffer rack, and the top wall of the lower rail comprises a top edge extending towards the center of the lower rail assembly and a flanging extending downwards from the top edge; a plurality of transmission teeth are arranged on the turned-over edge in the length direction; the upper surface of the buffer rack is connected to the top edge through a positioning column; one of the side surface of the buffer rack and the side surface of the flange is provided with a convex part, and the other one is provided with a concave part clamped and matched with the convex part. The upper surface of the buffer rack is connected with the top edge through the positioning column, the side face of the buffer rack is clamped and matched with the concave portion through the protruding portion, the upper surface of the buffer rack forms a fixing face, the side face of the buffer rack forms another fixing face, the fixing faces of the buffer rack are increased, and the connecting strength of the buffer rack and the lower rail assembly is improved. Therefore, the stability of the lower rail assembly is improved. Even if transmission is carried out under large torque, due to the fact that the connection strength is increased, the positions of the buffer teeth are not prone to deviation.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle seats, and in particular to a seat assembly, an electric slide rail and a lower rail assembly. Background Art

[0002] At present, in the slide rails used in seat assemblies, in order to alleviate the impact force during the meshing process between the transmission tooth and the transmission gear, a buffer rack is usually set on one side of the transmission tooth. However, the cantilever of the buffer rack is relatively large, the fixing stiffness is relatively weak, and the deformation is relatively large, which causes the position of the meshing line of the buffer tooth to change, affecting the stability of the transmission between the transmission tooth and the transmission gear.

[0003] Therefore, how to improve the stability of the slide rail during transmission has become a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0004] The present application proposes a seat assembly, an electric slide rail and a lower rail assembly to improve the stability of the slide rail during transmission.

[0005] In order to achieve the above objectives, this application discloses the following technical solutions:

[0006] In a first aspect, the present application provides a lower rail assembly, including a lower rail and a buffer rack, wherein the top wall of the lower rail includes a top edge extending toward the center of the lower rail and a flange extending downward from the top edge; the flange is provided with a plurality of transmission teeth along the length direction;

[0007] The upper surface of the buffer rack is connected to the top edge through a positioning column; one of the side surface of the buffer rack and the side surface of the flange is provided with a protrusion, and the other is provided with a recessed portion that is snap-fitted with the protrusion.

[0008] In some examples, the protrusion and the recess are interference fit.

[0009] In some examples, the raised portion includes a plurality of bosses disposed on the side of the buffer rack, and the recessed portion includes a plurality of open grooves disposed on the flange.

[0010] In some examples, the plurality of protrusions and the plurality of positioning posts are staggered in the length direction.

[0011] In some examples, the protrusion is a rectangular structure.

[0012] In some examples, the recessed portion is located at the tooth groove of the transmission tooth and is located above the tooth groove meshing line of the transmission tooth in the height direction.

[0013] In some examples, the recesses are arranged adjacent to the transmission teeth or spaced apart from the transmission teeth.

[0014] In some examples, the buffer rack includes a mounting portion and a rack portion, the rack portion extends downward from the mounting portion, the positioning column is arranged on the upper surface of the mounting portion, and a plurality of buffer teeth are formed at the end of the rack portion.

[0015] In a second aspect, the present application provides an electric slide rail, comprising a slide rail, a gear box and a motor, wherein the slide rail comprises a lower rail and an upper rail, the lower rail of the lower rail assembly is connected to the vehicle body, and the upper rail is connected to the seat; the gear box with a transmission gear is fixed on the upper rail; the motor is transmission-connected to the gear box to realize the sliding of the upper rail relative to the lower rail; the lower rail is any of the above-mentioned lower rails.

[0016] In a third aspect, the present application provides a seat assembly, including a seat and an electric slide rail as described above, wherein the seat is connected to an upper rail of the electric slide rail.

[0017] It can be seen from the above technical solution that the upper surface of the buffer rack is connected to the top edge through a positioning column, and the side surface is engaged by a protrusion and a recessed portion. The upper surface of the buffer rack forms a fixed surface, and the side surface of the buffer rack forms another fixed surface, which increases the fixed surface of the buffer rack and improves the connection strength between the buffer rack and the lower rail, thereby improving the stability of the lower rail. Even when transmitting under high torque, the position of the buffer teeth is not easily offset due to the increased connection strength. In addition, the side surface of the buffer rack forms another fixed surface to achieve the purpose of positioning, thereby reducing the assembly error of the buffer rack relative to the lower rail teeth. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some examples or embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without creative work, and the present application can also be applied to other similar scenarios based on the provided drawings. Unless it is obvious from the language environment or otherwise explained, the same reference numerals in the figures represent the same structure or operation.

[0019] Figure 1 A three-dimensional diagram of an electric slide provided by the prior art;

[0020] Figure 2 A stereogram of a lower rail provided by the prior art;

[0021] Figure 3 A side view of a lower rail provided by the prior art;

[0022] Figure 4a A top view of a lower rail provided by the prior art;

[0023] Figure 4bfor Figure 4a Enlarged view of the AA section;

[0024] Figure 5a A front view of a buffer tooth provided by the prior art;

[0025] Figure 5b for Figure 5a A partial enlarged view of

[0026] Figure 6a A top view of a lower rail assembly provided in an embodiment of the present application;

[0027] Figure 6b for Figure 6a Sectional view of the middle BB section;

[0028] Figure 6c for Figure 6b Enlarged view of part C;

[0029] Figure 7 for Figure 6c A magnified view of part D in the middle;

[0030] Figure 8 for Figure 6c Enlarged view of part E in the middle;

[0031] Fig. 9 for Figure 6c Enlarged view of the FF section;

[0032] Fig.10 for Fig. 9 Enlarged view of section G;

[0033] Fig.11a A front view of a buffer tooth provided in an embodiment of the present application;

[0034] Fig.11b for Fig.11a Enlarged view of section H;

[0035] Fig.12 for Fig.11b A magnified view of part I;

[0036] In the figure: 10-slide rail; 20-gear box; 30-motor;

[0037] 11-lower rail; 12-upper rail; 13-buffer rack; 21-transmission gear; 11'-lower rail assembly;

[0038] 111-bottom wall; 112-side wall; 113-top wall; 1131-top edge; 1132-flange; 1133-opening; 114-transmission tooth; 1141-recessed portion;

[0039] 131 - main body; 132 - positioning column; 133 - buffer tooth; 134 - raised portion; 135 - joint seam. DETAILED DESCRIPTION

[0040] The present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It will be understood that the specific embodiments described herein are only used to explain the related application, rather than to limit the application. The described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0041] In a multi-purpose vehicle (MPV), the second row of seats has a relatively long travel, and the slide rails of the second row of seats mostly use long slide rails; according to the driving form, the slide rails are divided into manual slide rails and electric slide rails.

[0042] See also Figure 1 The electric slide shown in the figure includes a slide rail 10, a gear box 20 and a motor 30, wherein the slide rail 10 includes a lower rail 11 and an upper rail 12, the lower rail 11 is connected to the vehicle body, and the upper rail 12 is connected to the seat; the gear box 20 with a transmission gear 21 is fixed on the upper rail 12; the motor 30 is transmission-connected to the gear box 20 to realize the sliding of the upper rail 12 relative to the lower rail 11.

[0043] See also Figures 2 to 4b The lower rail 11 shown in the figure includes a bottom wall 111, two top walls 113 and two side walls 112, wherein the bottom wall 111 is used to be connected to the bottom plate of the vehicle body; the two top walls 113 are arranged opposite to the bottom wall 111, and the two side walls 112 connect one end of the bottom wall 111 and the corresponding top wall 113; the top wall 113 includes a top edge 1131 extending from the side wall 112 to the center O of the lower rail 11 and a flange 1132 extending downward from the top edge 1131, and an opening 1133 for accommodating the upper rail 12 is formed between the flanges 1132 of the two top walls 113; the flange 1132 is provided with a transmission tooth 14 for meshing with the transmission gear 21 of the gear box 20. In order to alleviate the impact force during the meshing process between the transmission gear 21 and the transmission tooth 14, a buffer rack 13 is provided on one side of the flange 1132. The buffer rack 13 cooperates with the transmission tooth 14 on the flange 1132 to form a rack of the gear rack mechanism; and the transmission gear 21 is the gear of the gear transmission mechanism.

[0044] It should be noted here that the lower rail 11 has a length direction X, a width direction Y and a height direction Z, the length direction X, the width direction Y and the height direction Z are perpendicular to each other, and the length direction X corresponds to the length of the lower rail 11, the width direction Y corresponds to the width of the lower rail 11, and the height direction Z corresponds to the height of the lower rail 11.

[0045] Combination Figure 4a and Figure 4b , see Figure 5a and Figure 5b The buffer rack 13 includes a main body 131 and a plurality of positioning posts 132, and the plurality of positioning posts 132 are arranged on the upper surface of the main body 131 along the length direction. The positioning posts 132 pass through the mounting holes of the top edge 1131, and are fixed to the lower rail 11 by riveting a plurality of positioning posts 132. The positioning posts 132 are riveted to the top edge 1131 to form fixed points, and the plurality of fixed points can be understood as the fixed surface P of the buffer rack 13; the buffer teeth 133 of the buffer rack 13 that cooperate with the transmission gear 21 can be understood as the driving end, and the distance from the driving end to the fixed surface P can be understood as the cantilever L.

[0046] When the slide rail 10 is adjusted with load, the transmission torque between the transmission gear 21 and the buffer rack 13 is large, and the deformation of the buffer teeth 133 of the buffer rack 13 is large, resulting in a change in the position of the meshing line of the buffer teeth 133, affecting the stability of the transmission.

[0047] In addition, after the transmission gear 21 moves multiple times under high torque, the position of the buffer tooth 133 of the buffer rack 13 will be offset and cannot play a buffering role; in addition, since the cantilever L of the buffer tooth 133 of the buffer rack 13 is large, the dimensional error of the buffer tooth 133 at a position far from the fixed point after installation is relatively large, and it is easy for the meshing surface of the buffer rack 13 to be lower than the meshing surface of the transmission tooth 14, and the buffer tooth 133 cannot play a buffering role.

[0048] In order to solve the above technical problems, an embodiment of the present application discloses a lower rail assembly 11 ′.

[0049] Combination Figure 1 and Figure 2 , see Figures 6a to 10 The lower rail assembly 11' includes a lower rail 11 and a buffer rack 13. The top wall 113 of the lower rail 11 includes a top edge 1131 extending toward the center of the lower rail 11 and a flange 1132 extending downward from the top edge 1131; the flange 1132 is provided with a plurality of transmission teeth 14 along the length direction; the upper surface of the buffer rack 13 is connected to the top edge 1131 through a positioning column 132; one of the side surface of the buffer rack 13 and the side surface of the flange 1132 is provided with a protrusion 134, and the other is provided with a recessed portion 1141 that is snap-fitted with the protrusion 134.

[0050] It can be seen that in the example of the present application, the upper surface of the buffer rack 13 is connected to the top edge 1131 through the positioning column 132, and the side is snap-fitted through the protrusion 134 and the recessed portion 1141. The upper surface of the buffer rack 13 forms a fixed surface P1, and the side of the buffer rack 13 forms another fixed surface P2, which increases the fixed surface of the buffer rack 13, reduces the length of the cantilever L, and improves the connection strength between the buffer rack 13 and the lower rail 11, thereby improving the stability of the lower rail 11.

[0051] Even when the transmission is performed under a large torque, the position of the buffer tooth 133 is not easily offset due to the increased connection strength. In addition, the side of the buffer rack 13 forms another fixed surface P2 to achieve the positioning effect, so the assembly error of the buffer rack 13 relative to the lower rail 11 teeth is reduced.

[0052] It should be noted that one of the side surfaces of the above-mentioned buffer rack 13 and the side surfaces of the flange 1132 is provided with a protrusion 134, and the other is provided with a recessed portion 1141 which is snap-fitted with the protrusion 134. It can be understood as follows: a protrusion 134 is provided on the side surfaces of the buffer rack 13, and a recessed portion 1141 is provided on the side surfaces of the flange 1132; a recessed portion 1141 is provided on the side surfaces of the buffer rack 13, and a protrusion 134 is provided on the side surfaces of the flange 1132.

[0053] The raised portion 134 can be understood as a boss protruding outward from the side surface, and the boss can be a regular structure such as a cylindrical structure, a rectangular structure, an elliptical structure, or an irregular structure.

[0054] The recessed portion 1141 can be understood as a hole or a groove that is recessed inward from the side surface. The shape of the recessed portion 1141 is consistent with the shape of the raised portion 134 . In the figure, the recessed portion 1141 is an open groove that passes through the flange 1132 .

[0055] The raised portion 134 and the recessed portion 1141 are transition fit or interference fit, and the interference fit can ensure that the raised portion 134 and the recessed portion 1141 form a fixed point, thereby improving the connection strength between the buffer rack 13 and the lower rail 11. In addition, the raised portion 134 and the recessed portion 1141 adopt an interference fit, which can be used as a positioning for the centering arrangement of the transmission tooth 14 and the buffer tooth 133, and can maximize the accuracy of the relative position of the transmission tooth 14 and the buffer tooth 133.

[0056] The raised portion 134 includes a plurality of bosses disposed on the side surface of the buffer rack 13 , and the recessed portion 1141 includes a plurality of open grooves disposed on the flange 1132 .

[0057] Multiple protrusions 134 and multiple positioning columns 132 are staggered in the length direction, and the fixing points between the upper surface of the buffer rack 13 and the top edge 1131 and the fixing points between the side surface of the buffer rack 13 and the flange 1132 are staggered. This not only reduces the arrangement of fixed points, but also forms a stable triangular structure, thereby improving the connection strength between the buffer rack 13 and the lower rail 11.

[0058] The recessed portion 1141 is located on the side close to the transmission tooth 14. In some examples, the recessed portion 1141 is located at the tooth groove of the transmission tooth 14 and is located above the tooth groove meshing line of the transmission tooth 14 in the height direction. The recessed portion 1141 is arranged at the tooth groove without affecting the connection strength of the transmission tooth 14.

[0059] It should be noted that the recessed portion 1141 is arranged adjacent to the transmission teeth 14 or arranged at intervals from the transmission teeth 14. The teeth can be arranged at intervals or adjacent to the teeth according to the stamping process and size. Since the distance between the raised portion 134 and the buffer teeth 133 is relatively close (the cantilever L is small), the relative size error of the buffer teeth 133 on the buffer rack 13 is relatively small.

[0060] The buffer rack 13 may include a main body 131 and a plurality of positioning posts 132, and the plurality of positioning posts 132 are arranged on the upper surface of the main body 131 along the length direction. The main body 131 may include a mounting portion and a rack portion, the rack portion extends downward from the mounting portion, the positioning posts 132 are arranged on the upper surface of the mounting portion, and a plurality of buffer teeth 133 are formed at the end of the rack portion. It should be noted that the buffer rack 13 is made of plastic, and the width of the buffer teeth 133 is greater than the width of the transmission teeth 14.

[0061] In addition, the present application can also increase the number of riveted locating posts 132 to increase the number of fixing points on the upper surface of the buffer rack 13. In addition, multiple fixing points are added to the upper surface of the buffer rack 13 to improve the fit between the buffer rack 13 and the lower rail 11, and further improve the connection rigidity between the buffer rack 13 and the lower rail 11, thereby avoiding the displacement of the plastic tooth position due to the deformation characteristics of the plastic material.

[0062] In the above example of the present application, one lower rail 11 is correspondingly installed with one buffer rack 13; in order to reduce the installation precision and improve the installation efficiency. One lower rail 11 is correspondingly installed with the above-mentioned multiple buffer racks 13, and multiple buffer racks 13 are installed at the top edge 1131 and the flange 1132 by splicing, and there is a splicing seam 135 between adjacent buffer racks 13, such as Figures 11a to 12 shown.

[0063] Combination Figure 1 and Figure 2 , see Figures 6 to Fig.12The present application discloses an electric slide rail, including a slide rail 10, a gear box 20 and a motor 30, wherein the slide rail 10 includes a lower rail assembly 11' and an upper rail 12, wherein the lower rail 11 of the lower rail assembly 11' is connected to the vehicle body, and the upper rail 12 is connected to the seat; the gear box 20 with a transmission gear 21 is fixed on the upper rail 12; the motor 30 is transmission-connected with the gear box 20 to realize the sliding of the upper rail 12 relative to the lower rail 11; the lower rail 11 is any of the above-mentioned lower rails 11. Since the above-mentioned lower rail 11 has the above-mentioned effects, the electric slide rail including the above-mentioned lower rail 11 has the corresponding effects, which will not be described in detail here.

[0064] The present application also discloses a seat assembly, including a seat and the electric slide rail as described above, wherein the seat is connected to the upper rail 12 of the electric slide rail. Since the electric slide rail has the above effects, the seat assembly including the electric slide rail has corresponding effects, which will not be described in detail here.

[0065] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used, and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. The scope of application involved in the present application is not limited to the technical solution formed by a specific combination of the above-mentioned technical features, but should also cover other technical solutions formed by any combination of the above-mentioned technical features or their equivalent features without departing from the above-mentioned application concept. For example, the above-mentioned features are replaced with the technical features with similar functions disclosed in this application (but not limited to) to form a technical solution.

Claims

1. A lower rail assembly, characterized in that: It comprises a lower rail and a buffer rack, wherein the top wall of the lower rail comprises a top edge extending toward the center of the lower rail and a flange extending downward from the top edge; the flange is provided with a plurality of transmission teeth along the length direction; The upper surface of the buffer rack is connected to the top edge through a positioning column; one of the side surface of the buffer rack and the side surface of the flange is provided with a protrusion, and the other is provided with a recessed portion that is snap-fitted with the protrusion.

2. The lower rail assembly according to claim 1, characterized in that: The protrusion is interference fit with the recess.

3. The lower rail assembly according to claim 1, characterized in that: The raised portion includes a plurality of bosses arranged on the side surface of the buffer rack, and the recessed portion includes a plurality of open grooves arranged on the flange.

4. The lower rail assembly according to claim 3, characterized in that: The plurality of bosses and the plurality of positioning posts are staggered in the length direction.

5. The lower rail assembly according to claim 3, characterized in that: The boss is a rectangular structure.

6. The lower rail assembly according to claim 3, characterized in that: The recessed portion is located at the tooth groove of the transmission tooth and is located above the tooth groove meshing line of the transmission tooth in the height direction.

7. The lower rail assembly according to claim 6, characterized in that: The recessed portion is arranged adjacent to the transmission teeth or spaced apart from the transmission teeth.

8. The lower rail assembly according to claim 6, characterized in that: The buffer rack includes a mounting portion and a rack portion, the rack portion extends downward from the mounting portion, the positioning column is arranged on the upper surface of the mounting portion, and a plurality of buffer teeth are formed at the end of the rack portion.

9. An electric slide rail, characterized in that: It comprises a slide rail, a gear box and a motor, wherein the slide rail comprises a lower rail assembly and an upper rail, the lower rail of the lower rail assembly is connected to the vehicle body, and the upper rail is connected to the seat; the gear box with a transmission gear is fixed on the upper rail; the motor is transmission-connected to the gear box to realize the sliding of the upper rail relative to the lower rail assembly; the lower rail assembly is the lower rail assembly as described in any one of claims 1 to 8.

10. A seat assembly, characterized in that: It comprises a seat and the electric slide rail as claimed in claim 9, wherein the seat is connected to the upper rail of the electric slide rail.

Images