JP2017171045A - Slide device for vehicle and rolling element circulation unit for slide device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a rolling circulation of rolling elements in respective encasing parts as well as a smooth relative movement between a lower rail and an upper rail, without increasing a size of a rolling element circulation unit.SOLUTION: A rolling element circulation unit 40 comprises; a first annular encasing part 41 disposed on a surface opposing a body 50 and a cover 60; a second annular encasing part 42 on a surface opposing the body 50 and a base 70; and a plurality of rolling elements 100 disposed in the respective encasing parts in an annular form that can circulate the elements. The plurality of rolling elements 100 forms a structure capable of rotatably moving while contacting with the operation surface 16, and the first and second annular encasing parts 41, 42 disposed in a lower rails 10, respectively. The first and second annular encasing parts 41, 42 are arranged to overlap with each other in a horizontal direction in a state where the rolling element circulation unit 40 is fixed to an upper rail 20.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a slide device for a vehicle and a rolling element circulation unit for the slide device.

  2. Description of the Related Art Conventionally, there are a vehicle slide device that supports a vehicle seat movably in the front-rear direction, and a rolling element circulation unit used in the slide device. For example, in Patent Document 1, in a vehicle seat slide device having a first rail and a second rail, a pair of annular housings fixed to the second rail and capable of annularly arranging a plurality of rolling elements in a freely rolling manner. The structure which has the rolling-element circulation unit which has a part is described. According to this configuration, the rolling element abuts on the operating surface provided on the first rail and the annular accommodating portion of the rolling element circulation unit, and rolls and circulates in the annular accommodating portion. The rails move relative to each other, enabling smooth back and forth movement.

JP 2012-71656 A

  In Patent Document 1, the rolling element circulation unit is provided between the first rail and the second rail, and a pair of annular housing portions in which the rolling elements are arranged so as to be able to roll and circulate are provided in the first case and the first case. It is described that the two cases are provided on the opposite surface and the same surface.

  However, the rolling element circulation unit disclosed in Patent Document 1 is disposed between the first rail and the second rail, and a pair of annular accommodating portions are formed on the same surface. Therefore, the space in which the pair of annular accommodating portions is provided is limited. Since the space for forming the pair of annular housing portions is limited, the size of the arc portion of the annular housing portion may not be sufficiently secured. Therefore, when the circular arc portion of the annular housing portion cannot be sufficiently secured, there is a concern that the rolling element cannot smoothly roll and circulate through the annular housing portion, so that the first rail and the second rail cannot be smoothly moved relative to each other. .

  This invention is made | formed in view of such a situation, The objective is, when forming an annular accommodating part in a rolling element circulation unit, without enlarging a rolling element circulation unit, a 1st rail and a 2nd rail Provided are a vehicle slide device and a rolling device circulation unit for the slide device that can smoothly move relative to each other.

  In order to solve the above-described problems, the problem-solving means of the present invention includes a first rail provided in a vehicle and a first rail supported by the first rail so as to be relatively movable in the extending direction of the first rail. Two rolling elements, a housing part provided with first and second annular accommodating parts, and a rolling element circulation unit having a plurality of rolling elements respectively accommodated in the first and second annular accommodating parts, The housing portion includes a first case portion, and a second case portion and a third case portion that are engaged with the first case portion, and the housing portion has an opposing surface on the first case portion and the second case portion. A first annular housing portion is provided so as to allow the rolling elements to be arranged in an annular manner so as to be able to roll and circulate, respectively, and the second annular housing portion is provided on opposing surfaces of the first case portion and the third case portion. Each of the rolling elements is annular and can be circulated freely. The rolling elements, which are provided so as to be arranged and accommodated in the first and second annular accommodating portions, abut against the operating surface provided on the first rail and the annular accommodating portion, and the operating surface And the annular housing portion are configured to roll and circulate in the first and second annular housing portions respectively by rolling and moving between the annular housing portion and the first and second annular housing portions. Are preferably provided so as to overlap each other in the horizontal direction when fixed to the second rail.

  According to the above configuration, the first and second annular housing portions are formed so as not to overlap each other in the horizontal direction because the rolling element circulation unit is in a positional relationship overlapping with each other in the horizontal direction in a state where the rolling element circulation unit is fixed to the second rail. Compared with the case where it is made, the formation surface of the 1st and 2nd annular accommodating part can be largely ensured, without changing the magnitude | size to the perpendicular direction of a housing. That is, the arc portions of the first and second annular housing portions can be set large without requiring an increase in the size of the housing. Therefore, each rolling element can be smoothly rolled and circulated in each annular housing portion without requiring an increase in the size of the rolling element circulation unit, and thus the first rail and the second rail, and the first rail and the second rail. Can be moved relative to each other smoothly.

  Further, as a means for solving the problems of the present invention, the first and second annular accommodating portions are provided so as to overlap each other even in a vertical direction in a state where the rolling element circulation unit is fixed to the second rail. It is preferred that

  According to the above configuration, the first and second annular housing portions are in a positional relationship in which the rolling element circulation units overlap with each other in the vertical direction in a state where the rolling element circulation unit is fixed to the second rail, so that they do not overlap with each other in the vertical direction. Compared with the case where it is formed, a large formation surface of the first and second annular housing portions can be secured without changing the size of the housing in the horizontal direction.

  Moreover, as a problem-solving means of the present invention, the rolling element has a first sphere formed of a metal material with a first diameter, and a second diameter smaller than the first diameter and a resin material. Preferably, the first sphere and the second sphere are alternately arranged in the first and second annular housing portions.

  According to the above configuration, the metal spheres having the first diameter and the resin spheres having a smaller diameter than the metal spheres are alternately arranged in the annular housing portion. Since the resin sphere has a smaller diameter than the metal sphere, the resin sphere can suppress friction between the annular housing portion and the operating surface, and deformation due to wear of the resin sphere can be suppressed.

  Further, as means for solving the problems of the present invention, the first and second annular accommodating portions are in contact with the operating surface via the rolling element, and are in contact with the operating surface via the rolling element. It is preferable that the contact surface has a rigidity higher than that of the non-contact surface.

  According to the above configuration, the contact surface in the annular housing portion of the rolling element circulation unit provided between the first rail and the second rail is in contact with the operating surface of the first rail via the rolling element. Yes. That is, the contact surface receives the load from the first rail via the rolling elements. The part constituting the contact surface is formed of a material having higher rigidity than the part constituting the non-contact surface that does not receive a load from the first rail. As a result, the contact surface can sufficiently receive the load applied from the first rail via the rolling elements, and therefore, it is possible to suppress a decrease in durability of the annular housing portion.

  Further, as means for solving the problems of the present invention, a rolling element circulation unit having a housing part provided with first and second annular accommodating parts and a plurality of rolling elements respectively accommodated in the first and second annular accommodating parts. And the housing part includes a first case, and a second case and a third case engaged with the first case, and the housing portion is provided on an opposing surface of the first case and the second case. A first annular housing portion is provided so that the rolling elements can be annularly arranged so as to be capable of rolling and circulating, respectively, and the second annular housing portion is disposed on the opposing surfaces of the first case and the third case. The rolling elements are provided so as to be arranged in an annular shape so as to be capable of rolling and circulating, respectively, and the rolling elements accommodated in the first and second annular accommodating portions are connected to the operating surface provided on the first rail and the annular shape. Abutting against the housing part, The first and second annular housing portions are configured to circulate and circulate in the first and second annular housing portions by rolling between the moving surface and the annular housing portion, respectively. It is preferable that the circulation unit is a rolling device unit for a slide device that is provided so as to overlap with each other in the horizontal direction when the circulation unit is fixed to the second rail.

  According to the present invention, each rolling element can be smoothly rolled and circulated within each annular housing portion without increasing the size of the rolling element circulation unit, and the first rail and the second rail can be relatively moved relative to each other. be able to.

The perspective view which shows a vehicle seat. The front view of FIG. 1 of one Embodiment in this invention. The perspective view which shows the 2nd rail of the embodiment. The perspective view which shows the 2nd rail with which the rolling element circulation unit of the embodiment is assembled | attached. (A) The exploded perspective view which shows the structure of the rolling element circulation unit of the embodiment, (b) The exploded perspective view which shows the structure of the rolling element circulation unit of the embodiment. (A) Exploded perspective view of the first case, the second case, and the third case of the rolling element circulation unit of the embodiment, (b) The first case, the second case, and the third of the rolling element circulation unit of the embodiment. The exploded perspective view of a case. The front view of the rolling element circulation unit of the embodiment. AA line sectional view of Drawing 4 of the embodiment. (A) The figure which shows typically the perspective view seen from the arrow B direction of FIG. 8, (b) The figure which shows typically the perspective view seen from the arrow B direction of FIG.

  Hereinafter, an embodiment embodying the present invention will be described with reference to the drawings.

(Whole vehicle seat)
As shown in FIG. 1, the vehicle slide device is fixed to a pair of left and right lower rails (the “first rail” of the present invention) 10 fixed in the front-rear direction of a vehicle floor 1, and fixed to a vehicle seat 2. A pair of left and right upper rails (the “second rail” of the present invention) 20 is supported so as to be relatively movable. Further, as shown in FIG. 2, a rolling element circulation unit 40 is provided between the upper rail 20 and the lower rail 10 in order to move the upper rail 20 smoothly and without backlash with respect to the lower rail 10.

(Configuration of lower rail)
As shown in FIG. 2, the lower rail 10 is inclined inward at the base portion 11 that is horizontal to the vehicle floor 1, the side portion 12 that extends upward from both ends of the base portion 11, and the lower ends of the both side portions 12. And an inclined portion 13 connected to the base portion 11, a horizontal portion 14 extending horizontally from the upper ends of both side portions 12 to the vehicle floor 1, and a hanging portion 15 extending downward from the horizontal portion 14. ing. The inner surfaces of both side portions 12 and both inclined portions 13 with which the rolling element 100 abuts are set as the operation surfaces 16.

(Upper rail configuration)
As shown in FIG. 2, the upper rail 20 includes a first rail piece 20a and a second rail piece 20b. The first rail piece 20a includes a base portion 21 that is horizontal with respect to the vehicle floor 1, a side wall 22 that extends upward from one end of the base portion 21 that is not opposed to the rail pieces 20a and 20b, The base portion 21 has an upright portion 23 that extends upward from the other end on the side where the rail pieces 20a and 20b are not opposed to each other, and a connecting portion 24 that extends inward upward from the upright portion 23. Similar to the first rail piece 20a, the second rail piece 20b has a base part 21, a side wall 22, a standing part 23, and a connecting part 24. The upper rail 20 having the space C surrounded by the two standing portions 23 is configured by overlapping the connecting portions 24 of the first rail piece 20a and the second rail piece 20b. A surface facing the lower rail 10 of both side wall portions 22 is set as a non-operation surface 25. The non-operation surface 25 is configured to face the operation surface 16 provided on the lower rail 10.

  Further, as shown in FIG. 3, attachment portions 26 to which the rolling element circulation units 40 are attached are provided in the vicinity of both ends in the longitudinal direction of both side wall portions 22 of the upper rail 20. Each attachment portion 26 is provided with two holes 27 to which the rolling element circulation unit 40 is attached. The attachment portion 26 is provided so that both non-operating surfaces 25 provided on the rail pieces 20a and 20b can be cut into a substantially rectangular shape. As shown in FIG. 4, four rolling element circulation units 40 are attached to the upper rail 20 in the present embodiment by attaching the rolling element circulation units 40 to the holes 27. Note that the number of rolling element circulation units 40 may be changed as appropriate depending on the length of both rails and the like.

(Rolling body circulation unit)
As shown in FIGS. 5A and 5B, the rolling element circulation unit 40 includes a body 50 (the “first case” of the present invention) and a cover 60 (the “invention of the present invention”) assembled and engaged with the body 50. Second case "). Further, the base 70 (the “third case” of the present invention) is engaged and assembled with the surface of the body 50 opposite to the side opposite to the side on which the cover 60 is assembled. A surface of the body 50 that faces the cover 60 is provided with a first annular housing path 41a that constitutes a first annular housing portion 41 in which the plurality of rolling elements 100 roll and circulate. Along with the first annular housing passage 41 a, a first annular housing groove 41 b constituting the first annular housing portion 41 is provided on the surface of the cover 60 that faces the body 50. That is, the first annular accommodating passage 41a and the first annular accommodating groove 41b are opposed to each other to form a space, thereby configuring the first annular accommodating portion 41 in which the plurality of rolling elements 100 roll and circulate. Furthermore, a second annular housing path 42a that forms a second annular housing path 42 that accommodates the plurality of rolling elements 100 so as to be capable of rolling and circulating is formed on the surface of the body 50 that faces the base 70. Along with the second annular accommodating passage 42 a, a second annular accommodating groove 42 b is provided on the surface of the body 50 that faces the base 70. Here, the second annular accommodating passage 42a and the second annular accommodating groove 42b are opposed to each other to form a space, thereby forming a second annular accommodating portion 42 in which a plurality of rolling elements 100 roll and circulate. . The first annular housing passage 41 and the second annular housing passage 42 are each formed in a substantially elliptical shape. The body 50, the cover 60, and the base 70 are configured to be engageable with each other by, for example, an adhesive or a fitting structure.

  As shown in FIGS. 6A and 6B, the body 50 includes a first body 51 and a second body 56.

  As shown in FIG. 6A, the first body 51 has a surface facing the cover 60 and a surface facing the base 70. The first body 51 is formed in a substantially U shape so that the second body 56 is assembled. A first non-contact surface 52 that is a part of the first annular housing passage 41 a is formed on the surface of the first body 51 that faces the cover 60. The first non-contact surface 52 does not contact the operating surface 16 of the lower rail 10 via the rolling element 100. Further, the first body 51 is formed with a first insertion hole 53 in which the first body 51, the cover 60, and the first base 71 can be engaged by inserting a screw or the like (not shown). ing. The first insertion hole 53 is provided so as to penetrate the first body 51.

  In addition, as shown in FIG. 6B, the first body 51 has a second annular housing groove 42 b formed on the surface facing the base 70. Further, since the rolling element 100 accommodated in the second annular accommodating path 42 a comes into contact with the operating surface 16 of the lower rail 10 at the end of the first body 51, A notch 54 is provided so as to open to one body 51. The first body 51 has a pair for engaging a pair of second locking pieces 76 provided on the first base 71 on both sides of the first insertion hole 53 on the surface facing the base 70. The second locking hole 55 is provided.

  Further, as shown in FIG. 6A, the second body 56 is formed in a quadrangular shape so that the first body 51 is assembled between the ends formed in a substantially U shape. A surface of the second body 52 that faces the cover 60 is formed with a first contact surface 57 that is a part of the first annular housing path 41a. The first contact surface 57 contacts the operating surface 16 of the lower rail 10 via the rolling element 100. That is, the first non-contact surface 52 formed on the first body 51 and the first contact surface 57 formed on the second body 56 are connected to form the first annular housing passage 41a. ing. Further, the second body 56 is provided with a first insertion hole 58 into which a screw or the like (not shown) for engaging with the cover 60 and the base 70 is inserted. The first insertion hole 58 is formed so as to penetrate the second body 56. Further, a pair of first locking pieces 59 for locking a pair of first locking holes 62 provided in the cover 60 are provided on both sides of the first insertion hole 58.

  Here, the first body 51 is formed of a resin material, and the second body 56 is formed of a metal material. The second body 56 is formed with a material having higher rigidity than that of the first body 51 because the first contact surface 57 that is in contact with the working surface 16 of the lower rail 10 and the rolling element 100 is formed on the second body 56. It is preferable. Since the first body 51 does not come into contact with the operating surface 16 of the lower rail 10 via the rolling elements 100, the first body 51 may be a material having a lower rigidity than the second body 56, for example, a resin material. .

  Next, as shown in FIGS. 6A and 6B, the cover 60 has a surface that faces the body 50. A first annular receiving groove 41 b is provided on the surface of the cover 60 that faces the body 50. Further, as shown in FIG. 6A, the cover 60 is formed with a first inclined surface 64 and a second inclined surface 65 that match the shapes of the operating surface 16 of the lower rail 10 of the cover 60 and the inclined portion 13 of the lower rail 10. Has been. As shown in FIG. 6B, on the surface of the cover 60 facing the body 50, a screw for engaging the body 50 and the base 70 is provided at the center on the inner peripheral side of the first annular housing groove 41b. A second insertion hole 61 through which (not shown) is inserted is provided. The second insertion hole 61 is provided so as to penetrate the cover 60. Further, on the surface of the cover 60 facing the body 50, first locking holes for engaging a pair of first locking pieces 59 formed on the second body 56 on both sides of the second insertion hole 61. 62 is provided. Furthermore, a long hole 63 is formed in the first annular housing groove 41b on the surface of the cover 60 facing the body 50. The long hole 63 is formed so as to penetrate the first inclined surface 64. Further, the long hole 63 is set to be narrower than the diameter of the rolling element 100 so that each rolling element 100 does not come out of the first annular housing groove 41b. In addition, the long hole 63 has a shape in which both end portions in the longitudinal direction are curved and the central portion extends substantially linearly along the longitudinal direction. In other words, the rolling element 100 is exposed from the cover 60 through the long hole 63, and thus can contact the operating surface 16 of the lower rail 10. Furthermore, a second insertion hole 66 through which a screw or the like (not shown) for engaging the body 50 and the base 70 is inserted is formed at the end of the second inclined surface 65.

  Next, as shown in FIGS. 6A and 6B, the base 70 is composed of a first base 71 and a second base 80.

  As shown in FIG. 6A, the first base 71 includes a bottom portion 72 and wall portions 73 on both end sides of the bottom portion 72. The bottom portion 72 is provided with a second contact surface 74 that forms a part of the second annular housing path 42a. A third insertion hole 75 for inserting a screw or the like (not shown) for engaging the body 50 and the cover 60 is provided on the same surface forming the second annular accommodating path 42a. The third insertion hole 75 is provided so as to penetrate the first base 71. A first body 51 and a first base 71 can be integrally formed on both sides of the third insertion hole 75 by engaging with a second locking hole 55 formed in the first body 51. Two locking pieces 76 are provided. The bottom 72 is formed with a third insertion hole 77 through which a screw or the like (not shown) for engaging the body 50 and the cover 60 is inserted. Further, the both wall portions 73 are provided with extending flange portions 78. Both flange portions 78 are formed with through holes 79 that can be fixed by inserting screws or the like into the holes 27 of the upper rail 20.

  As shown in FIG. 6A, the second base 80 has a substantially U-shape that can be engaged with the second contact surface 74 provided with the first base 71. A surface of the second base 80 facing the body 50 is provided with a second non-contact surface 81 that forms a part of the second annular housing path 42a. The second non-contact surface 81 contacts the operating surface 16 of the lower rail 10 via the rolling element 100. By connecting the second non-contact surface 81 and the second contact surface 74, the second annular accommodating path 42 a in the base 70 is formed.

  Here, it is preferable that the first base 71 provided with the second contact surface 74 is made of a metal material, and the second base 80 provided with the second non-contact surface 81 is made of a resin material. Since the second base 80 does not come into contact with the operating surface 16 of the lower rail 10 via the rolling elements 100, the second base 80 may be made of a resin that is a material having lower rigidity than the first base 71.

  In this embodiment, the rolling element 100 includes a metal sphere 101 (the present invention “first sphere”) formed of a metal material and a resin sphere 102 (the present invention “second sphere”) formed of a resin material. ). The metal sphere 101 has a diameter R1, the resin sphere 102 has a diameter R2, and the metal sphere 101 and the resin sphere 102 are provided so that “R1> R2” is satisfied. 5 (a) and 5 (b), the resin sphere 102 is indicated by hatching. Further, as shown in FIGS. 5A and 5B, the metal spheres 101 and the resin spheres 102 are alternately arranged in the first annular housing passage 41a and the second annular housing passage 42a, respectively. . The rolling element circulation unit 40 is integrally configured by accommodating the rolling element 100 in the first annular accommodating path 41 a and the second annular accommodating path 42 a and engaging the body 50, the cover 60, and the base 70.

  As shown in FIG. 7, the rolling element circulation unit 40 is configured such that each rolling element 100 accommodated in the first annular accommodating path 41 a and the first annular accommodating groove 41 b is exposed from the cutout portion 54 of the first body 51. It is configured. Further, each rolling element 100 accommodated in the second annular accommodating passage 42 a and the second annular accommodating groove 41 b is configured to be exposed from the long hole 63 of the cover 60.

  As shown in FIGS. 3 and 4, the hole 27 of the attachment portion 26 of the upper rail 20 and the through-hole 79 provided in the flange portion 78 of the first base 71 of the rolling element circulation unit 40 are screwed or the like ( It is fixed by inserting (not shown).

  FIG. 8 shows a cross-sectional view of a state in which the rolling element circulation unit 40 is attached to the upper rail 20 and is assembled so that the rolling element 100 abuts against the operating surface 16 of the lower rail 10. As shown in FIG. 8, the first annular housing portion 41 and the second annular housing portion 42 are provided so as to overlap each other in the horizontal direction and the vertical direction. In the first body 51, the first annular housing passage 41 a and the second annular housing groove 42 b are formed so as to overlap each other on the surfaces facing the cover 60 and the base 70. That is, in a state where the rolling element circulation unit 40 is assembled to the upper rail 20, the rolling elements 100 are in a positional relationship where they overlap each other in the horizontal direction and the vertical direction.

(Operation of vehicle sliding device)
Next, the operation of the vehicle slide device according to the present embodiment will be described.

  As shown in FIG. 8, when the rolling element circulation unit 40 is attached to the attachment portion 26 of the upper rail 20, the rolling element 100 accommodated in the first annular accommodation portion 41 is connected to the second body 56. 1 is in contact with the operating surface 16 of the lower rail 10 while being in contact with the contact surface 57. Further, the rolling element 100 accommodated in the second annular accommodating portion 42 contacts the operating surface 16 of the lower rail 10 while contacting the second contact surface 74 of the first base 71.

  Here, as shown in FIGS. 9A and 9B, when the rolling element 100 abuts against the operating surface 16, the first annular housing portion so that five rolling elements 100 face the operating surface 16. 41 and the 2nd cyclic | annular accommodating part 42 are formed. FIG. 9A shows a case where two rolling balls 100 face each other and two plastic balls 102 face each other when the rolling element 100 contacts the working surface 16. Further, FIG. 9B shows a case where the lower rail 10 slides with respect to the upper rail 20. That is, when the rolling element 100 abuts against the working surface 16, three metal spheres 101 and two resin spheres 102 face each other. Therefore, at least two metal spheres 101 always face the operating surface 16.

  When the upper rail 20 slides with respect to the lower rail 10, the first and second annular accommodation portions 41 and 41 are in contact with the working surface 16, the first contact surface 57, and the working surface 16 and the second contact surface 74, respectively. Each rolling element 100 accommodated in 42 circulates while rolling.

  As described above, according to the present embodiment, the following effects can be obtained.

  (1) According to this embodiment, the first annular shape in a state where the rolling element circulation unit 40 is attached to the upper rail 20 on the surface of the second body 56 of the rolling element circulation unit 40 facing the cover 60 and the base 70. Since the housing part 41 and the second annular housing part 42 are in a positional relationship overlapping each other in the horizontal direction, the first annular housing path 41a and the first annular housing groove 41b, and the second annular housing path 42a and the second annular housing groove The size of the formation surface of 41b can be ensured large without enlarging the rolling element circulation unit 40 in the horizontal direction.

  (2) According to the present embodiment, it is possible to ensure a large formation surface of the first annular housing passage 41a and the first annular housing groove 41b, and the second annular housing passage 42a and the second annular housing groove 42b. That is, the circular arc part of each annular accommodating path and the annular accommodating groove can be set large. Accordingly, when the rolling element 100 rolls and circulates in the arc portion, it is not necessary to loosen the speed at which the rolling element 100 rolls and circulates. 42 can be smoothly rolled and circulated. That is, the lower rail 10 and the upper rail 20 can be smoothly moved relative to each other.

  (3) According to the present embodiment, it is possible to ensure a large formation surface of the first annular housing passage 41a and the first annular housing groove 41b, and the second annular housing passage 42a and the second annular housing groove 42b. The approach angle when each rolling element 100 changes from the non-contact state to the contact state is made small with respect to the working surface 16 with which each rolling element 100 contacts, and each rolling element 100 is gradually brought into contact with the working surface. Thus, it is possible to suppress the generation of abnormal noise due to the contact sound between the rolling element 100 and the working surface 16 when the rolling element 100 rolls and circulates through the first annular accommodating part 41 and the second annular accommodating part 42a.

  (4) According to this embodiment, the first annular housing passage 41a and the first annular housing groove 41b, and the second annular housing passage 42a and the second annular housing groove 42b are arranged so as to overlap each other in the horizontal direction and the vertical direction. Has been. Thereby, the rolling element circulation unit 40 can suppress the enlargement to a horizontal direction and a perpendicular direction.

  (5) According to the present embodiment, the first contact surface 57 of the first annular housing passage 41a and the second contact surface 74 of the second annular housing passage 42a are made of a metal material. Moreover, the 1st non-contact surface 52 of the 1st cyclic | annular accommodation path 41a and the 2nd non-contact surface 81 of the 2nd cyclic | annular accommodation path 42a are comprised by the resin material. The first contact surface 57 and the second contact surface 74 receive the load from the lower rail 10 via the rolling element 100. On the other hand, the first non-contact surface 52 and the second non-contact surface 81 do not receive a load from the lower rail 10. As a result, the first contact surface 57 and the second contact surface 74 are formed of a metal material having higher rigidity than the first non-contact surface 52 and the second non-contact surface 81, so that the lower rail 10 A load can be received sufficiently, and a decrease in durability of the rolling element circulation unit 40 can be suppressed.

  (6) According to the present embodiment, the first non-contact surface 52 and the second non-contact surface 81 are made of a resin material having lower rigidity than the first contact surface 57 and the second contact surface 74. . As a result, the impact of the rolling element 100 in contact with the first non-contact surface 52 and the second non-contact surface 81 can be mitigated, so that the rolling element 100 has the first annular housing path 41a and the second annular housing path. It is possible to suppress the generation of abnormal noise due to the contact sound when rolling and circulating through 42a.

  (7) According to this embodiment, only the rolling element circulation unit 40 second body 56 and the first base 71 are formed of the metal material, and the other portions are formed of the resin material. As a result, it is possible to reduce the weight of the rolling element circulation unit 40 as compared with the case where the rolling element circulation unit 40 is entirely formed of a metal material.

  (8) According to this embodiment, the rolling element 100 includes the metal sphere 101 and the resin sphere 102, and the metal sphere 101 is formed with a larger diameter than the resin sphere 102. According to this configuration, when the rolling element 100 rolls and circulates in the first annular accommodating path 41a and the second annular accommodating path 42a, the resin spherical body 102 is more in the first annular accommodating path 41a than the metal spherical body 101. In addition, since the frictional force with the second annular housing passage 42a is reduced, the rolling body 100 is made of the first annular housing passage 41a and the second annular housing passage as compared with the case where the rolling bodies 100 are all formed of the metal sphere 101. It is possible to suppress the generation of abnormal noise due to the contact sound when rolling and circulating through 42a.

  (9) According to the present embodiment, the rolling element 100 includes the metal sphere 101 and the resin sphere 102, and the metal sphere 101 is formed with a larger diameter than the resin sphere 102. As a result, when the rolling element 100 rolls and circulates in the first annular accommodating path 41a and the second annular accommodating path 42a, the resin abutment 102 has a smaller diameter than the metal sphere 101, and thus the first abutment surface. Friction with the 57 and the second contact surface 74 can be suppressed. That is, it is possible to prevent the resin sphere 102 from being deformed due to wear.

  (10) According to this embodiment, the diameter of the metal sphere 101 is larger than the diameter of the resin sphere 102. By setting the metal sphere 101 and the resin sphere 102 to different diameters, tolerances can be set over a wide range, and there is no need to make the rolling element 100 with high manufacturing accuracy. Can be provided.

  (11) According to the present embodiment, at least five rolling elements 100 are provided to face the working surface 16. Thus, since at least five rolling elements 100 can roll and circulate while facing the working surface 16 of the annular housing portion 41 in parallel, the rolling elements 100 can smoothly roll and circulate. it can. Furthermore, since the rolling sphere 100 has the metal spheres 101 and the resin spheres 102 alternately arranged, the metal spheres 101 are in contact with the working surface 16 as shown in FIGS. At least two of them abut. Accordingly, since the resin sphere 102, which is a material having lower rigidity than the metal sphere 101, does not contact the operating surface 16, it is possible to suppress the resin sphere 102 from being worn and deformed.

  (12) According to this embodiment, at least two metal spheres 102 abut against the working surface 16. Thus, as compared with the case where only one metal sphere 102 abuts against the operation surface 16, the load from the lower rail 10 is applied to one of the metal spheres 102 abutting against the operation surface 16. Further, deformation of the metal sphere 102 can be suppressed.

  (13) According to this embodiment, the rolling element circulation unit 40 inserts a screw or the like (not shown) through the hole portion 27 of the attachment portion 26 of the upper rail 20 and the through hole 79 of the rolling element circulation unit 40. It is fixed by that. That is, the attachment portion 26 only needs to form the hole portion 27, and the upper rail 20 is not punched or bent, for example, in order to provide the rolling element circulation unit 40. Therefore, when the attachment portion 26 is formed, the process of processing the upper rail 20 can be omitted.

  In addition, you may change the said embodiment as follows.

  -In this embodiment, the 1st cyclic | annular accommodation part 41 and the 2nd cyclic | annular accommodation part 42 in the state attached to the upper rail 20 are arrange | positioned so that it may mutually overlap in a horizontal direction and a perpendicular direction. However, it does not necessarily have to be arranged so as to overlap each other in the horizontal direction and the vertical direction, and may be arranged so as to overlap each other only in the horizontal direction or the vertical direction according to the shapes of the lower rail 10 and the upper rail 20.

  -In this embodiment, the rolling element 100 is comprised by the metal spherical body 101 and the resin spherical body 102. FIG. However, the metal spheres 101 and the resin spheres 102 do not necessarily have to be configured. For example, the metal spheres 101 or the resin spheres 102 alone may be used, and the rolling elements 100 may have different diameters. Good.

  In the present embodiment, the metal spheres 101 and the resin spheres 102 are alternately arranged. Here, “alternating” in the present embodiment includes, for example, a case where two resin spheres 102 are arranged between the metal spheres 101. When two resin spheres 102 are arranged between the metal spheres 101, the number of rolling elements 100 facing the operation surface 16 is appropriately changed so that the resin spheres 102 do not contact the operation surface 16. Also good. That is, the arrangement relationship between the metal sphere 101 and the resin sphere 102 is not limited to the above embodiment. Furthermore, the positional relationship in which the rolling element 100 faces the operating surface 16 is not limited to the above embodiment.

  -In this embodiment, when attaching the rolling element circulation unit 40 to the attachment part 26 of the upper rail 20, for example, by interposing an elastic body (not shown) between the flange 52 and the attachment part 26, You may make it suppress the rattling of the rolling element circulation unit 40. FIG.

  In the present embodiment, the first body 51 is made of a resin material, the second body 56 is made of a metal material, the first base 71 is made of a metal material, and the second base 80 is made of a resin material. It is described to be. However, the body 50 and the base 70 do not have to be made of different rigid materials. For example, the body 50 and the base 70 may be made of a metal material or a resin material, respectively.

  In the present embodiment, it is described that the metal sphere 101 and the resin sphere 102 can be provided from different diameters. However, the rolling element 100 may not be constituted by the metal sphere 101 and the resin sphere 102. For example, the rolling element 100 may be composed of only the metal sphere 101 or the resin sphere 102.

  In the present embodiment, it is described that the metal sphere 101 is configured to have a larger diameter than the resin sphere 102. However, the magnitude relationship between the diameters of the metal sphere 101 and the resin sphere 102 is not limited. For example, the metal sphere 101 and the resin sphere 102 may be composed of the same diameter.

  In this embodiment, the rolling element is composed of a metal sphere 101 and a resin sphere 102. The resin sphere 72 may be formed of a rubber material.

DESCRIPTION OF SYMBOLS 1 ... Floor, 2 ... Seat, 10 ... Lower rail (this invention "1st rail"), 11 ... Base part, 12 ... Side part, 13 ... Inclined part, 14 ... Horizontal part, 15 ... Hanging part, 16 ... Working surface 20 ... Upper rail (the present invention "second rail"), 20a ... First rail piece, 20b ... Second rail piece, 21 ... Base part, 22 ... Side wall, 23 ... Standing part, 24 ... Connection part, 25 ... Non Actuating surface, 26: Mounting portion, 27: Hole portion, 40: Rolling body circulation unit, 41: First annular housing portion, 41a: First annular housing passage, 41b: First annular housing groove, 42: Second annular Housing part, 42a ... second annular housing path, 42b ... second annular housing groove, 50 ... body (the "first case part" of the present invention), 51 ... first body, 52 ... first non-contact surface, 53 ... 1st insertion hole, 54 ... notch, 55 ... 1st locking hole, 56 ... 2nd body, 57 ... 1st Contact surface, 58 ... first insertion hole, 59 ... first locking piece, 60 ... cover (the "second case portion" of the present invention), 61 ... second insertion hole, 62 ... first locking hole, 63 ... Long hole, 64 ... 1st inclined surface, 65 ... 2nd inclined surface, 66 ... 2nd insertion hole, 70 ... Base (this-application invention "3rd case part"), 71 ... 1st base, 72 ... Bottom part, 73 ... Wall part 74 ... second contact surface 75 ... insertion hole 76 ... second locking piece 77 ... third insertion hole 78 ... flange part 79 ... through hole 80 ... second base 81 ... first 2 non-contact surfaces, 100 ... rolling elements, 101 ... metal sphere (the present invention "first sphere"), 102 ... resin sphere (the present invention "second sphere").

Claims (5)

A first rail provided in the vehicle;
A second rail supported by the first rail so as to be relatively movable in the extending direction of the first rail;
A housing part provided with first and second annular housing parts, and a rolling element circulation unit having a plurality of rolling elements housed in the first and second annular housing parts, respectively.
The housing part includes a first case part, and a second case part and a third case part that are engaged with the first case part, and the housing part is disposed on an opposing surface of the first case part and the second case part. The first annular housing portion is provided so as to allow the rolling elements to be annularly arranged so as to be capable of rolling and circulating, respectively, and the second annular housing portion is provided on the opposing surface of the first case portion and the third case portion. Is provided so as to be able to arrange the rolling elements in an annular manner so as to be capable of rolling and circulating, respectively.
The rolling elements housed in the first and second annular housing portions are in contact with the working surface provided on the first rail and the annular housing portion, and between the working surface and the annular housing portion. A structure that circulates and circulates in each of the first and second annular accommodating portions by rolling and moving,
The said 1st and 2nd annular accommodating part is a vehicle slide apparatus provided so that it may become the positional relationship which mutually overlaps in the horizontal direction in the state in which the said rolling element circulation unit was fixed to the said 2nd rail. 2. The vehicle slide according to claim 1, wherein the first and second annular housing portions are provided so as to overlap each other even in a vertical direction in a state where the rolling element circulation unit is fixed to the second rail. apparatus. The rolling element is
A first sphere formed of a metal material with a first diameter, and a second sphere formed of a resin material with a second diameter smaller than the first diameter, and The vehicle slide device according to claim 1 or 2, wherein the first sphere and the second sphere are alternately arranged in the first and second annular housing portions. The first and second annular housing portions are
A contact surface that contacts the operating surface via the rolling element; and a non-contact surface that does not contact the operating surface via the rolling element;
The vehicular slide device according to any one of claims 1 to 3, wherein the abutting surface has rigidity higher than that of the non-abutting surface.
A housing part provided with first and second annular housing parts, and a rolling element circulation unit having a plurality of rolling elements housed in the first and second annular housing parts, respectively.
The housing part includes a first case part, and a second case part and a third case part that are engaged with the first case part, and the housing part is disposed on an opposing surface of the first case part and the second case part. The first annular housing portion is provided so as to allow the rolling elements to be annularly arranged so as to be capable of rolling and circulating, respectively, and the second annular housing portion is provided on the opposing surface of the first case portion and the third case portion. Is provided so as to be able to arrange the rolling elements in an annular manner so as to be capable of rolling and circulating, respectively.
The rolling elements housed in the first and second annular housing portions are in contact with the working surface provided on the first rail and the annular housing portion, and between the working surface and the annular housing portion. A structure that circulates and circulates in each of the first and second annular accommodating portions by rolling and moving,
The first and second annular housing portions are rolling device units for a slide device that are provided so as to have a positional relationship in which the rolling body circulation units overlap each other in a horizontal direction in a state where the rolling body circulation unit is fixed to the second rail.

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