Bearing bolt having a conical portion

Abstract

The proposed solution relates to an adjustment device (1), in particular for a vehicle seat (2), comprising a first component (10) that is mounted on a second component (12, 12') by means of a bearing bolt (11), wherein the second component (12, 12') has a conical portion (120) against which a conical portion (110) of the bearing bolt (11) rests.

Description

[0001] Bearing bolt with conical section

[0002] Description

[0003] The proposed solution concerns an adjustment device for a vehicle seat and a vehicle seat.

[0004] Vehicle seats are typically adjustable to allow different seat users to achieve a comfortable seating position and to be adapted to different space conditions. For example, a vehicle seat can be mounted in a vehicle so that it can be adjusted lengthwise by means of a longitudinal adjustment to allow different seating positions along the vehicle's longitudinal axis, a vehicle seat can be adjustable heightwise to adjust the seat height, and in a vehicle seat the inclination of a backrest relative to a seat part can be adjustable, to name just a few examples. Motorized drive devices can be provided to make such adjustments. This allows the settings to be made easily, e.g. by pressing buttons, or even completely automatically.

[0005] In some cases, such as height adjustment, significant lateral forces are applied to a bearing pin. These loads and additional movements could loosen the seat of such a bearing pin over time, potentially leading to a failure. Therefore, relatively large bearing pins are generally used in practice. This results in increased weight and a correspondingly larger installation space requirement.

[0006] The task is to specify a robust adjustment device.

[0007] This object is achieved by an article having the features of claim 1.

[0008] According to this, an adjusting device is specified, in particular for a vehicle seat, having a first component which is mounted on a second component by means of a bearing pin, wherein the second component has a conical section against which a conical section of the bearing pin rests.

[0009] This is based on the knowledge that up to now, stepped bolts have generally been used as bearing bolts. These are screwed flush with a collar, for example, into a retaining bracket. This creates a force connection (perpendicular to the bearing bolt) that is based purely on friction, via which the functional forces acting in the respective application are to be transmitted. Furthermore, the solution mentioned is based on the idea of ​​supplementing a force connection (in the direction perpendicular to the bearing bolt) on an otherwise flat contact surface with an additional form fit. This is done by screwing the bearing bolt into a countersunk hole via the conical section rather than screwing it flush against the second component (e.g. the retaining bracket). This means that the functional forces can also be transmitted via the resulting form fit.In addition, the bevel allows for a greater loosening torque under the influence of transverse forces at the same tightening torque, thereby increasing the robustness of the fastening. As a result, the main load can be transferred via the conical section rather than the thread core cross-section, allowing the use of a smaller thread, which in turn reduces the installation space required. The conical sections, in particular, lie flat against one another.

[0010] The first component can be pivotally mounted on the second component via the bearing pin. For example, the bearing pin has a bearing section on which the first component is mounted with some play. The conical sections nevertheless allow for secure fixation of the bearing pin to the second component. For example, the first component has a spindle. This enables precise adjustment even under heavy loads.

[0011] The second component can have a thread into which the thread of the bearing bolt is screwed. This enables secure mounting.

[0012] For example, the bearing pin has a bearing section that has a larger diameter than the thread of the bearing pin. This allows for secure mounting of the first component.

[0013] The conical section can be arranged between the bearing section and the thread of the bearing pin. This allows the conical section to taper toward the thread. The conical section can be securely held in the conical section of the second component, which is designed as a counterbore.

[0014] The second component can be constructed in multiple parts, particularly two parts. This allows for particularly simple production.

[0015] The second component comprises, for example, a holding part and a fastening element mounted thereon. The thread of the second component can be formed on the fastening element. This allows for a locally increased depth for the fastening element, while the holding part can be made thinner and manufactured particularly easily. This allows for particularly high stability to be achieved with low weight and a small installation space requirement.

[0016] For example, the fastening element has the conical section of the second component. This makes the retaining part particularly easy to manufacture.

[0017] The fastening element can be welded to the holding part, which enables simple production without additional components and a particularly secure connection.

[0018] An angle between a surface line and a conical axis of the conical sections of the bearing pin and the second component can be 30° to 60°, in particular 40° to 50°, in particular 45°. This allows for particularly secure support. According to one aspect, a vehicle seat is provided, comprising the adjustment device according to any embodiment described herein. Regarding the advantages, reference is made to the above information on the adjustment device.

[0019] For example, the adjusting device is configured to adjust a seat height of a seat part of the vehicle seat relative to a base of the vehicle seat.

[0020] The seat part is supported on the base, for example, via a lever. The adjustment device can be configured to exert a force on the lever and / or on the seat part to effect an adjustment.

[0021] The concept underlying the invention will be explained in more detail below with reference to the exemplary embodiments illustrated in the figures. They show:

[0022] Fig. 1 shows a vehicle seat with a height adjustment;

[0023] Fig. 2 is a schematic representation of the height adjustment according to Fig. 1 and a

[0024] Adjustment device for height adjustment;

[0025] Fig. 3 shows the adjustment device mounted on the vehicle seat according to Fig. 2;

[0026] Fig. 4 is a sectional view of the adjusting device according to Fig. 3; and

[0027] Fig. 5 is a sectional view of another adjustment device.

[0028] Fig. 1 shows a vehicle seat 2 with a seat part 20 and a backrest 21. The backrest 21 is pivotally mounted on the seat part 20 about a pivot axis S by means of a fitting arrangement 22.

[0029] The seat part 20 has a seat height relative to a base B along a height axis z. The seat part 20 (together with the backrest 21) is adjustable in seat height by means of a height adjustment 23, as will be explained in more detail below.

[0030] The vehicle seat 2 can be mounted on a vehicle floor FB of a vehicle and is mounted as shown in Fig. 1. The vehicle seat 2 further comprises a longitudinal adjustment 24. The longitudinal adjustment 24 allows a longitudinal adjustment of the vehicle seat 2 along a longitudinal axis x. By means of the longitudinal adjustment 24, the seat part 20 and the backrest 21 can be moved together along the longitudinal axis x relative to the vehicle floor FB. The longitudinal axis x is aligned perpendicular to the vertical axis z. The longitudinal adjustment 24 comprises two pairs, each consisting of a rail that can be fixed to the vehicle floor FB and, in the example shown, is fixed, which can also be referred to as a floor rail, and a seat rail 240 that is mounted thereon so that it can be moved along the longitudinal axis x. The rest of the vehicle seat 2 can be mounted on the seat rail 240 and is mounted in the example shown. The two pairs, of which only one is visible in the view in Fig. 1, are spaced from one another along a lateral axis.The lateral axis is aligned perpendicular to the longitudinal axis x and perpendicular to the height axis z.

[0031] In the example shown, the floor rail serves as base B.

[0032] Fig. 2 shows the two seat rails 240 running parallel to each other, as well as two side parts 202 of the seat part 20 supported thereon via the height adjustment 23. The side parts 202 are connected to each other via a cross tube 201, in this case firmly connected to each other.

[0033] The height adjustment 23 comprises several levers 230, in this case two levers 230 per side part 202.

[0034] A motorized adjustment device 1 serves to adjust the vehicle seat 2, namely, in this case, to adjust the seat height. For this purpose, the adjustment device 1 is arranged, for example, on one of the levers 230.

[0035] The adjustment device 1 comprises a motor unit 13. The motor unit 13 comprises an electric motor 130 shown in Fig. 3 and a gear 131 with a spindle nut 132 schematically illustrated in Fig. 2. The gear 131 is mounted on one of the levers 230 (in the example shown, on a rear lever 230). In the present case, the gear 131 is pivotally connected to the lever 230. It would also be conceivable to pivot the gear 131, for example, on a side part 202 or on the cross tube 201. The spindle nut 132 of the gear 131 engages a first component 10, specifically a spindle 100 of the first component. The first component 10 is pivotally mounted on a second component 12 (see Fig. 3) that is firmly connected to the seat rail 240.

[0036] The electric motor 130 is operatively connected to the gear 131 via a shaft. The electric motor 130 drives the gear 131, so that the gear 131 moves up or down on the spindle 100 depending on the direction of rotation, pivoting the levers 230 and subsequently adjusting the height of the seat part 20. The electric motor 130 is arranged adjacent to the cross tube 201. In this example, the electric motor 130 is aligned parallel to the cross tube 201.

[0037] Fig. 3 shows the adjustment device 1 on the vehicle seat 2 with further details. It can be seen in particular that the first component 10 has, in addition to the spindle 100, a spindle shoe 101, on which the first component 10 is mounted on the second component 12 by means of a bearing pin 11.

[0038] The second component 12 is fixed relative to the seat rail 240, in this case firmly mounted to the seat rail 240. The first component 10 is pivotally mounted on the second component 12. The second component 12 has a holding part 122, in this case in the form of a holding plate, to which the first component 10 is mounted. Furthermore, the second component 12 has a contact section 127, which rests on the seat rail 240 from above. In this case, the second component 12 is designed in the form of a holding angle. The contact section 127 and the holding part 122 are aligned perpendicular to one another. The holding part 122 is formed integrally with the contact section 127.

[0039] Fig. 4 shows the pivotable mounting of the first component 10 and the second component 12.

[0040] The first component 10 is formed in one piece, apart from a bushing 102 which is arranged in a bearing receptacle 103 of the spindle shoe 101.

[0041] In this case, the second component 12 is constructed in several parts, specifically in two parts. A fastening element 123 is provided, which is mounted on the holding part 122 of the second component 12. The fastening element 123 is inserted into an opening 125 in the holding part 125. The opening 125 is a through-hole. In this case, the fastening element 123 is welded to the holding part 122. A weld seam 124 extends around the fastening element 123. As an alternative to a weld seam, the fastening element 123 could also be attached to the holding part 122 in another way, e.g., by screwing it.

[0042] The second component 12 has a thread 121, in this case an internal thread. A thread 113 of the bearing pin 11 is screwed into the thread 121. The thread 121 is formed on the fastening element 123. In this case, the thread 121 is formed on a through-hole of the fastening element 123. The second component 12 has a conical section 120. A conical section 110 of the bearing pin 11 rests against the conical section 120 of the second component 12. The conical sections 120, 110 each describe the shape of a truncated cone. The conical sections 120, 110 lie flat against one another, in this case essentially over their entire surface.

[0043] An angle (p) between an (arbitrary) generatrix and the cone axes (coinciding with the axis D) of the conical sections 110, 120 of the bearing pin 11 and also of the second component 12 is generally 30 degrees to 60 degrees, here 45 degrees.

[0044] The conical portion 120 of the second component 12 is formed on the fastening element 123, adjacent to the thread 121.

[0045] The bearing pin 11 has a head 111 with a tool interface for rotating the bearing pin 11. The head has a larger diameter than the bearing receptacle 103 of the spindle shoe 101. A bearing section 112 of the bearing pin 11 adjoins the head 111. The bearing section 112 is circularly cylindrical. The bearing section 112 is inserted into the bushing 102 inserted into the bearing receptacle 103 and is pivotably received therein about an axis D. The axis D is oriented perpendicular to the longitudinal extension of the spindle 100.

[0046] The conical section 110 of the bearing pin 11 borders the bearing section 112 of the bearing pin 11. Starting from the bearing section 112, the bearing pin 11 tapers until the conical section 110 borders the thread 113. Accordingly, the bearing section 112 of the bearing pin 11 has a larger diameter than the thread 113 of the bearing pin 11. The conical section 110 of the bearing pin 11 is thus arranged between the bearing section 112 and the thread 113 of the bearing pin 11.

[0047] The distance between the holding part 122 and the head 111 of the bearing pin 11 is greater than the thickness of the spindle shoe 101 including the bushing 102. This results in a play that facilitates pivoting of the first component 10 about the axis D. The bushing 102 is a steel back bushing in this case.

[0048] The bearing pin 11 is firmly screwed into the thread 121 of the second component 12. The conical section 110 of the bearing pin 11 rests against the conical section 120 of the second component 12. Since the main load acting along the longitudinal axis of the spindle 100 is thus introduced into the holding part 122 via the conical sections 110, 120, the threads 113, 121 are relieved of load, thus preventing the threads 113, 121 from becoming detached from each other over time.

[0049] The fastening element 123 has a step 126 on the side of the holding part 122 opposite the head 111 of the bearing pin 11. Thus, the fastening element 123 (which can also be referred to here as a threaded insert) is secured to the holding part 122 not only by the weld seam 124, but also by a positive fit.

[0050] Due to the angled contact surfaces, a higher contact force is generated between the bearing pin 11 and the fastening element 123 at the same tightening torque compared to a flat contact surface of a stepped bolt, which leads to a greater loosening torque under the influence of transverse forces. This enables an improved robustness of the connection.

[0051] Fig. 5 shows a one-piece design of the second component 12'. In this example, the conical section 121 and the thread 121 are formed directly on the retaining part. Otherwise, the structure corresponds to that shown in Fig. 4.

[0052] List of reference symbols

[0053] 1 adjustment device

[0054] 10 first component

[0055] 100 spindles

[0056] 101 spindle shoe

[0057] 102 socket

[0058] 103 Stock recording

[0059] II Bearing bolt

[0060] 110 conical section

[0061] III Head

[0062] 112 storage section

[0063] 113 threads

[0064] 12, 12' second component

[0065] 120 conical section

[0066] 121 threads

[0067] 122 Holding part

[0068] 123 Fastening element

[0069] 124 Weld seam

[0070] 125 Opening

[0071] 126 level

[0072] 127 Annex section

[0073] 13 Motor unit

[0074] 130 electric motor

[0075] 131 gearboxes

[0076] 132 spindle nut

[0077] 2 vehicle seats

[0078] 20 Seat part

[0079] 200 side panel

[0080] 201 Cross tube

[0081] 21 Backrest

[0082] 22 Fitting arrangement

[0083] 23 Height adjustment

[0084] 230 levers

[0085] 24 Longitudinal adjustment

[0086] 240 seat rail

[0087] B Base D Axis

[0088] FB vehicle floor

[0089] S swivel axis

[0090] (p angle

Claims

Claims 1. Adjusting device (1), in particular for a vehicle seat (2), with a first component (10) which is mounted on a second component (12, 12') by means of a bearing pin (11), wherein the second component (12, 12') has a conical section (120) against which a conical section (110) of the bearing pin (11) rests.

2. Adjusting device (1) according to claim 1, characterized in that the first component (10) is pivotally mounted on the second component (12, 12') with the bearing pin (11).

3. Adjusting device (1) according to claim 1 or 2, characterized in that the first component (12, 12') has a spindle (100).

4. Adjusting device (1) according to one of the preceding claims, characterized in that the second component (12, 12') has a thread (121) into which a thread (113) of the bearing bolt (11) is screwed.

5. Adjusting device (1) according to claim 4, characterized in that the bearing pin (11) has a bearing section (112) which has a larger diameter than the thread (113) of the bearing pin (11).

6. Adjusting device (1) according to claim 4 or 5, characterized in that the conical section (110) is arranged between the bearing section (112) and the thread (113) of the bearing bolt (11).

7. Adjusting device (1) according to one of the preceding claims, characterized in that the second component (12) is constructed in several parts, in particular in two parts.

8. Adjusting device (1) according to claim 7, dependent on claim 4, characterized in that the second component (12) has a holding part (122) and a fastening element (123) mounted thereon, wherein the thread (121) of the second component (12) is formed on the fastening element (123).

9. Adjusting device (1) according to claim 8, characterized in that the fastening element (123) has the conical section (120) of the second component (12).

10. Adjusting device (1) according to claim 8 or 9, characterized in that the fastening element (123) is welded to the holding part (122).

11. Adjusting device (1) according to one of the preceding claims, characterized in that an angle (cp) between a surface line and a cone axis of the conical sections (110, 120) of the bearing pin (11) and the second component (12, 12') is 30° to 60°, in particular 45°.

12. Vehicle seat (2), characterized by the adjusting device (1) according to one of the preceding claims.

13. Vehicle seat (2) according to claim 12, characterized in that the adjusting device (1) is designed to adjust a seat height of a seat part (20) of the vehicle seat (2) relative to a base (B) of the vehicle seat (2).

14. Vehicle seat (2) according to claim 13, characterized in that the seat part (20) is supported on the base (B) via a lever (230), wherein the adjusting device (1) is designed to exert a force on the lever (230) and / or on the seat part (20).

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