DE29909138U1 - Suspension, swiveling seat post with cushioning - Google Patents

Description

!Suspension, pivoting seat post with end position damping _{## ##} Heinz Schlutz

Description Sheet 1

The invention relates to a spring-loaded seat post for reducing shocks and impacts that are transmitted to the spine and intervertebral discs by uneven road surfaces. The radial forces that arise when cycling are gently absorbed by a controlled pivoting of the seat post when under load. A spring that can be adjusted to the body weight is located in a housing and can be adjusted from the outside by turning it.

State of the art

Several seat posts of this generic type are known.

The difference to already protected saddle shock absorbers is this:

a.) DE 44 37 602 A1 from August 10, 1995

There is no possibility of adjusting the spring force and it is secured against rotation by means of a double cross pin which is guided in a slotted hole in the saddle mounting bolt.

b.) DE 195 16 826 A1 from October 19, 1995

Adjustment of the spring force is not possible when installed and has a rotation lock by a coaxially mounted bolt

c.) DE 43 35 411 A1 from April 20, 1995

Adjustment of the spring force is not possible when installed and is prevented from rotating by an integrated ball cage.

d.) WO 8905752 A1

has no possibility of adjusting the spring force when installed and is protected against rotation by a coaxial bolt that engages in axial slots.

e.) US Patent 4,736,983 dated 01.12.88

without possibility of adjusting the spring force when installed and has an anti-rotation device by means of a key fitted in the housing and a groove in the saddle mounting bolt.

f.) Utility model application file number 298 01 105.1

already has an adjustable spring force and a rotation lock only for the unloaded state. When loaded, this seat post can rotate around itself in an uncontrolled manner, and there is no way to ensure that it returns to its original position.

Sprung, pivoting seat post with end position damping _{## #<} Heinz Schlutz

Description Sheet 2

All of the above-mentioned seat posts also do not provide any suggestion for accommodating them in different diameters of seat tubes. None of the above-mentioned seat posts solves the problem of end position damping.

problem

The invention is based on the object of improving a seat post of the generic type in such a way that a good springy axial displacement is achieved, which is equipped with special sliding properties and at the same time the radial forces that occur when pedaling can be balanced out within a certain pivoting range without causing uncontrollable rotation. The various adjustment options for exact body weight and body length should be possible, as well as the installation of the seat post in different mounting diameters on bicycles.

the solution of the problem

The inventive design of this type allows good springy axial displacement and limited radial pivoting, which only becomes effective when the saddle is loaded. This enables relaxed riding that corresponds to the natural movement sequence. The various adjustment options were also solved by the inventive design.

Sprung, pivoting seat post with end position damping _{tt tm} Heinz Schlutz

Description Sheet

The invention is explained in more detail below with reference to the drawing. It shows: Fig. 1 Spring-loaded, adjustable and pivoting seat post with end position damping

List of reference symbols

1 seat post bolt

2 saddle bolts

3 Locking

4 Bellows

5 Adjustment ring

6 Guide piece

7 Guide bracket

8 Seat tube

9 Spring

10 Leadership

11 Guide bracket

12 Ring elastomer

13 Locking pin

14 grooves

15 Elastomer

16 End screw connection

17 Adjustment ring

Fig. 1 shows the seat post, which has a housing (8) and can be moved like a telescope by means of the assembled bolt (1,2). The movement is pre-tensioned by a spring (9) that can be adjusted to the weight of the bicycle saddle user. Under the weight of the saddle user, the locking pin is

(13) of the bolt (1,2) can be pivoted in the groove (14), thus enabling a defined pivoting movement of the saddle only when under load. For low-friction axial displacement and radial rotation, a guide (7,10) made of plastic strips is fitted in the guide piece (6) and the guide bracket (11), which contain components to improve the sliding properties. After the saddle is relieved of weight, the saddle will immediately return to its original position due to the structural shape of the groove (14). A complete or uncontrollable rotation is not possible.

To change the preload force of the spring (9), the guide piece (6) can be adjusted via a thread, so that the desired suspension can be adjusted to the weight of the driver.

The length of the seat post can be adjusted by adjusting the composite bolt (1,2), so that this solution is valid for small and tall riders.

The outer diameter of the seat post can be adjusted to the size of the bicycle's receiving tube using the cone of the adjustment rings (5,17).

An end position damper made of elastomer (12,15) at both ends of the spring travel serves as additional cushioning for very hard impacts.

The invention can be used for all conventional bicycle saddles, even retrofitted.

Achieved advantages This inventive type of seat post achieves a comfortable axial suspension in combination with a wear-resistant, maintenance-free, space-saving radial pivoting capability in the housing.

Claims (10)

1. Seat post for bicycles and similar devices, which is equipped in a tubular housing with an adjustable spring that can be adapted to the body weight and a one-piece or composite bolt that is supported at least once or multiple times, characterized in that the locking pin ( 13 ) of the bolt ( 1 ) is fastened in a lock ( 14 ) with a triangular or conical shape of the tube ( 8 ) and the composite bolt ( 1 , 2 ) with the firmly mounted saddle can thus pivot under load by a certain number of degrees, preferably 30°, maximum 45°, and then does not permit any further pivoting due to the shape. 2. Seat post according to protection claim 1, characterized in that the bolt ( 1 , 2 ) returns to its original position after the load is removed. 3. Seat post according to claim 1 to 2, characterized in that the bolt ( 1 , 2 ) is a height-adjustable, lockable bolt which enables the adjustment of different saddle heights. 4. Seat post according to protection claims 1 to 3, characterized in that the assembled bolt ( 1 , 2 ) has a guide piece ( 6 ) whose longitudinal displacement by means of a threaded connection effects an adjustment of a preload of the spring ( 9 ) and enables an adjustment of different body weights. 5. Seat post according to protection claims 1 to 4, characterized in that the seat post has an end position damping at the end, which is formed by an elastomer ( 15 ) and an adjustable end screw connection ( 16 ) which is activated at the end of the stroke by the bolt ( 1 , 2 ). 6. Seat post according to protection claims 1 to 5, characterized in that the seat post has a further end position damping at the starting point of the locking pin, which is formed by a ring elastomer ( 12 ) and the fixed guide holder ( 11 ) as well as the locking pin ( 13 ), and becomes active when the bolt ( 1 , 2 ) springs back. 7. Seat post according to protection claims 1 to 6, characterized in that the guidance of the one-piece or assembled bolt ( 1 , 2 ) takes place with unfilled or filled plastic bands ( 7 , 10 ), of which at least one content component serves to reduce friction and improve sliding properties. 8. Seat post according to protection claims 1 to 7, characterized in that the seat post has conical, slotted adjustment rings ( 5 , 17 ) on the tube ( 8 ), which allow a simple external diameter adjustment and thus enables installation in all conventional bicycle seat tubes with different installation dimensions. 9. Seat post according to protection claims 1 to 8, characterized in that the seat post is constructed in such a way that the tube ( 8 ) can be completely sunk into the bicycle seat tube. 10. Seat post according to protection claims 1 to 9, characterized in that the resilient composite bolt ( 1 , 2 ) is protected by a bellows ( 4 ).