DE102013106710B3 - Vehicle seat and utility vehicle with at least one vehicle seat - Google Patents

Abstract

The invention relates to a vehicle seat (1, 2) with a seat part (4), with a backrest part (5), with a frame part (6) and with an adjusting device (7) for adjusting a spring preload of a weight and / or height adjustment device (10 ), in which the adjusting device (7) has a spigot shaft element (20) protruding outwardly beyond the frame part (6) and rotatable about an axis of rotation (26), and one that can be attached to the spigot shaft element (20) can be operated manually and has a freewheel around the axis of rotation (26) ) has freely rotatable pivot lever element (21) with a lever arm part (30), wherein the pivot lever element (21) comprises an inner head part (31) rotatable with respect to the lever arm part (30) for receiving the pin shaft element (20), with between the lever arm part (30) and the head part (31) a free-wheeling and blocking element acting in the direction of rotation is arranged interacting, the pivoting lever element (21) in pivoting directions (32, 33) about the axis of rotation (26) against Can be fixed on a pivot locking element (35) over the frame part (6), and the pivot locking element (35) has two stop surfaces (37, 38) which are spaced apart in the pivoting direction (32, 33) and against which the pivot lever element (21) can strike.

Description

The invention relates to a vehicle seat with a seat part, with a backrest part, with a frame part and with an adjusting device for adjusting a spring bias of a weight and / or height adjustment device, wherein the adjusting means on the frame part on the outside hervororkragendes and about a rotation axis rotatable pin shaft element and a Has to be attached to the pin shaft member manually operable and with a freewheel about the axis of rotation freely rotatable pivot lever element having a Hebelarmteil.

Moreover, the invention relates to a utility vehicle, in particular an agricultural utility vehicle, with at least one vehicle seat.

Generic vehicle seats, which have a spring preload for a weight adjustment device or for a height adjustment device, are widely known from the prior art. In order to be able to adjust a respective spring preload on the vehicle seat to the respective weight of a person who takes a seat on the vehicle seat, the vehicle seat has a corresponding adjusting device by means of which it can individually adjust the preload. Often can be made on the vehicle seat on the spring preload immediately a height adjustment in particular of the seat part, so that the vehicle seat cumulatively or alternatively includes a spring-biased height adjustment device. In addition to hydraulically or pneumatically operated weight and / or height adjustment devices, which are not the subject of the present invention, there are also mechanically acting weight and / or height adjustment devices which comprise corresponding spring elements, such as spiral spring elements. In this case, mechanically acting adjusting devices are often provided which have, for example, a manually operated crank or pivot lever element in order to be able to manually adjust the spring preload of the weight and / or height adjustment device by means of a suitable adjustment mechanism. Associated adjustment means comprise a spigot shaft element to which on the one hand the crank or a pivot lever element is arranged. On the other hand, the spigot shaft element is in operative contact with a suitable clamping device for changing the spring preload, wherein the crankshaft or pivot lever element, the spigot element can be rotated so that depending on the direction of rotation, the spring preload is increased or reduced.

From the DE 91 03 611 U1 For example, a seat assembly is known in which the seat support is articulated via cross-shaped spring struts on a seat frame. The upper pivot points of the struts are connected by guide members with a spindle. This spindle has a left-hand thread at its front part and a right-hand thread at its rear part. By rotating the spindle by means of a handle which is arranged on the front of the seat, the guide members can be moved either closer to each other or from each other. Thus, a height adjustment of the seat or an adjustment of the seat on the weight of the driver is possible.

A disadvantage of such mechanically acting adjustment, it is, however, that the crank or pivot lever element often gravitationally often independently down towards the body floor of a passenger compartment aligns, creating the risk that the crank or pivot lever element in particular in the horizontal springs of the vehicle seat to this body floor or the like abuts and this disturbs the ride comfort of the vehicle seat sensitive. In addition, the risk of injury of such an uncontrolled down hanging crank or swivel lever element is substantially increased because a person sitting on the vehicle seat can injure himself in particular with his foot or lower leg. In addition, such an uncontrolled vertically downwardly hanging crank or swivel lever element can interfere with the vertical springs of the vehicle seat, as it protrudes far into the footwell in front of the vehicle seat.

It is an object of the invention to develop generic vehicle seats in particular for use in commercial vehicles with regard to their adjustment for setting a spring preload of a weight and / or height adjustment such that at least the disadvantages mentioned above can be overcome.

The object of the invention is achieved by a vehicle seat having a seat part, with a backrest part, with a frame part and with an adjusting device for adjusting a spring preload of a weight and / or height adjustment device, in which the adjusting device projects beyond the frame part on the outside and about an axis of rotation rotatable spigot shaft element and an attachable to the spigot shaft member manually operable and with a freewheel about the rotation axis freely rotatable pivot lever element having a Hebelarmteil, wherein the pivot lever element comprises a relative to the Hebelarmteil rotatable head inner part for receiving the spigot element and between the Lever arm and the head part acting in the direction of rotation freewheeling and locking member is arranged interactively, wherein the pivot lever element in pivoting directions about the axis of rotation relative to the frame member on a pivot locking element can be fixed and wherein the pivot locking element has two spaced apart in the pivoting direction stop surfaces, against which the pivot lever element can strike ,

If the pivot lever element can be fixed in all pivot directions, especially about the axis of rotation of the journal element, the danger is considerably reduced that this pivot lever element accidentally - in particular due to gravity - down in the direction of the body floor of a passenger compartment, and thereby causes the disadvantages mentioned above ,

It is understood that the pivot lever element can be fixed to the seat part, if it is ensured that the pivot lever element does not adversely affect a vertical springs of the seat part.

According to the invention, however, the pivot lever element can be fixed to the frame part.

In any case, the pivot lever element can thus be held against rotation in relation to the axis of rotation of the pin shaft member.

Here, the pivot lever element can be configured versatile. In order to enable a free-wheeling in a rotational direction about the axis of rotation of the spigot element structurally simple on the pivot lever element, the pivot lever element according to the invention comprises a relative to the Hebelarmteil rotatable head inner part for receiving the Zapfenwellenelements, wherein between the Hebelarmteil and the head inner part a freewheeling and locking member is arranged interactively ,

A generically acting freewheeling and blocking member could also be provided on the shaft side. However, this would only unnecessarily increase the structural design of the vehicle seat itself.

In this respect, the term "pivoting directions" describes a pivoting movement of the pivot lever element in a freewheeling direction, in which the pivot lever element is pivoted about the axis of rotation without entrainment of the PTO shaft element, or an opposite pivotal movement of the pivot lever element in a locking direction, in which the pivot lever element entraining the PTO element about its axis of rotation is pivoted.

So that the pivot lever element can be limited in all directions of pivoting in its pivoting angle about the spigot element around, the pivot locking element according to the invention has two stop surfaces spaced apart in the pivoting direction.

Between these two spaced abutment surfaces, the pivot lever element can be rotated or pivoted about the axis of rotation of the journal element back and forth until a desired spring preload is adjusted.

Here, the lower of the two abutment surfaces is aligned substantially horizontally on the vehicle seat. In this respect, it runs in a horizontal plane, so that the pivot lever element is also aligned horizontally in its rest position.

So that the abutment surfaces can cope with forces of 17 Nm and more without problems, it is advantageous if the abutment surfaces have a height extending radially to the axis of rotation of the journal element of more than 2 mm or more than 5 mm.

In particular, such abutment surfaces can be advantageously configured for the pivot lever element, when the pivot locking element is arranged at least partially concentrically around the journal element.

The abutment surfaces may be structurally brought very close to the pivot lever element, when the pivot locking element has a longitudinal extent aligned with the journal element of more than 20 mm or more than 50 mm.

Also, the present pivot locking element can be designed versatile. For example, at least the lower of the two abutment surfaces may be pulled out below the pivot lever element in the direction of the axis of rotation of the journal element so that the lever arm part can be deposited from above onto this lower abutment surface

If the pivot securing element comprises a sleeve part, wherein the sleeve part has a pivot groove on its circumference, in which a corresponding projection formed on the lever arm part can be engaged, it can be avoided that the pivot locking element does not protrude too far into the footwell in front of the vehicle seat.

Advantageously, this formed on the pivot lever element projection be moved back and forth between the two spaced abutment surfaces when the spring bias is adjusted by a means of the pivot lever element corresponding rotation of the pin shaft member.

Moreover, it is advantageous if the pivot groove extends arcuately in the pivoting direction about the axis of rotation of the journal element. As a result, the projection formed by the lever arm part, which indeed engages in the pivoting groove, can advantageously be guided on or in the pivoting securing element.

Accordingly, a preferred embodiment provides that the lever arm part has on its outer surface at least one projection corresponding to a pivot securing element arranged on the frame part.

In this case, this projection is of the form that it abuts against the spaced abutment surfaces when the pivot lever element is moved around the axis of rotation of the journal element.

In particular, the lower of the two in the pivoting direction spaced abutment surfaces prevents, in conjunction with the pronounced on the Hebelarmteil projection, that the pivot lever element unintentionally rotates down.

The pivot lever element is advantageously plugged onto the spigot shaft element and it can accordingly be removed again from this spigot shaft element, if necessary, in order to reverse, for example, the freewheeling direction and the locking direction.

In order to ensure that the pivot lever element can be attached to both sides of the pin shaft element, it is advantageous if in each case a projection is arranged on two opposite sides of the pivot lever element.

In addition, the projection can be structurally simple contact with the two abutment surfaces in contact, when the projection and a receiving opening for receiving the pin shaft member are arranged on the same side of the pivot lever element.

Moreover, it is advantageous if the projection is configured as a web element extending radially in the longitudinal extension of the lever arm part. This makes it possible that the projection or its web part can invest with its longitudinal side on the stop surfaces, whereby a particularly secure mounting of the pivot lever element can be ensured in particular at the bottom of the two stop surfaces.

Ideally, the projection thus forms a web part which extends radially from the axis of rotation of the journal element.

If the journal element furthermore comprises a polygonal journal end part, then a ratchet grip part which is known per se and is modified with respect to the pivot locking element can be used as pivot lever element, as is known, for example, from the tool sector.

The polygonal spigot end part can ideally be designed as a square spigot end part or as a hex spigot end part in order to be able to ensure good force transmission.

In order to reduce the risk that the pivot lever element in use of the vehicle seat unintentionally fall off the pin shaft element and can be lost, it is advantageous if a captive is provided by means of which the pivot lever element is captively on the pin shaft element can be arranged.

For example, this captive comprises a screw element which can be inserted through the receiving opening for receiving the PTO shaft element and screwed into a head side of the PTO shaft threaded hole and thus secured, the screw head is configured such that it rests at least partially on the head inner part of the pivot lever element, so that the pivot lever element can not solve unintentionally.

Alternatively, the captive can also be such that a spring-biased ball member can engage in a convex designed area, this spring-biased ball element may be on the pin shaft member or within the receiving opening on the head inner part of the pivot lever element. Accordingly, the convexed portion is then placed either on the journal element or within the receiving aperture.

In addition, the object of the invention is also achieved by a commercial vehicle, in particular by an agricultural utility vehicle, with at least one vehicle seat, wherein the utility vehicle or an agricultural utility vehicle characterized by a vehicle seat according to one of the features disclosed here.

If the commercial vehicle, in particular the agricultural utility vehicle, comprises the vehicle seat according to the invention, it can advantageously be prevented that the pivot lever element inadvertently gets into a vertically downwardly oriented hanging position due to commercial vehicle movements or vehicle seat movements and thereby approaches the body floor or at least critically near the springs of the seat part can come down to this, and it may cause injury to the foot or leg area of sitting on the vehicle seat person.

Further advantages, objects and features of the present invention will be explained with reference to the appended drawing and the following description, in which an example of a vehicle seat equipped according to the invention with a pivot securing element is shown and described. In the drawing show:

1 schematically shows a perspective part front view of a vehicle seat with a seat part unterbauendes frame part with a pivot locking element arranged thereon for rotationally securing a pivot lever element to a pin shaft element of an adjusting device for adjusting a spring preload;

2 schematically a front perspective view of the frame part of the 1 without seat part;

3 schematically a detail view of the pivot locking element of the 1 and 2 ; and

4 schematically an exploded view with respect to the pivot lever element and the pivot shaft element at least partially converting the pivot locking element of the 1 to 3 ,

In the in the 1 only partly shown vehicle seat 1 it is a commercial vehicle seat 2 a commercial vehicle not shown here in detail 3 with a seat part 4 , with a backrest not shown here 5 , with a frame part 6 and with an adjustment device 7 for adjusting a spring preload of one of four spring elements 8th (here only explicitly numbered) of a spring package 9 a not shown here further differentiated weight and / or height adjustment 10 (please refer 2 ).

The frame part 6 consists in this embodiment essentially of a scissor part 11 , which between an upper or seat-side component group 12 and a lower or body-side component group 13 is arranged such that the seat part-side component group 12 using the scissor part 11 opposite the body-side component group 13 is height adjustable. As a result, in particular, the seat part 4 in its height 14 opposite a body floor 15 well and widely adjusted.

The seat part-side component group 12 is at the bottom of the seat part 4 attached and the body-side component group 13 is on the body floor 15 attached.

The adjustment device 7 includes in this embodiment a spigot shaft element 20 (please refer 3 and 4 ) and one on the pin member 20 attachable swivel lever element 21 ,

The journal element 20 is through a hole 22 (please refer 4 ) in a front cross member 23 the seat part-side component group 12 outward 24 in front of the frame part 6 guided. In this respect, the spigot element penetrates 20 the front cross member 23 of the frame part 6 from outside to inside and thus protrudes over the frame part 6 outward.

Here is the inner end 25 (please refer 3 ) of the journal element 20 coupled with a tensioning mechanism, not shown here, such that upon appropriate rotation of the spigot element 20 around its axis of rotation 26 the spring elements 8th of the spring package 9 either strained or relieved.

At its outer end 27 of the journal element 20 is a square end part 28 shaped, on which the pivot lever element 21 can be plugged.

The pivot lever element according to the invention 21 consists of a Hebelarmteil 30 and one opposite the lever arm part 30 rotatable head inner part 31 , wherein the rotatable head inner part 31 inside the lever arm part 30 is mounted such that the Hebelarmteil 30 in a first direction or freewheeling direction 32 around the head inner part 31 can be rotated freewheeling in the sense of a freewheel, so that the pin shaft element is not about its axis of rotation 26 is turned. However, the lever arm part rotates 30 in the opposite direction or in the reverse direction 33 the head inside part 31 and in this case also the journal element with about the axis of rotation 26 , In this respect, is between the Hebelarmteil 30 and the head inner part 31 a per se known freewheeling and locking member (not shown here) arranged interactively.

In addition, the head inner part 31 a receiving opening 31A for receiving the square part 28 of the journal element 20 on.

In particular, from the representations according to the 1 and 2 is easy to see that the pivot lever element 21 in particular due to the interaction with gravity in the freewheeling direction 32 would always swing down if it was not held by hand or in the reverse direction 33 would be pivoted to the spring preload on the vehicle seat 1 adjust.

It is also easy to see that the pivot lever element 21 thereby in a substantially vertically downwardly oriented position 34 would align.

To such an undesirable downward pivoting of the pivot lever element 21 always safe to operate, includes the vehicle seat 1 According to the invention a pivot locking element 35 , by means of which the pivot lever element 21 or in particular the lever arm part 30 of the pivot lever element 21 in all swing directions 32 respectively. 33 opposite the frame 6 can be determined.

The pivot locking element according to the invention 35 is on the frame part 6 arranged as shown in this embodiment. Here is the pintle securing element 35 on the front cross member 23 the seat part-side component group 12 attached.

The swing locking element 35 is in this embodiment also as a sleeve part 36 configured, which is made of a die-cast material. Alternatively, the pivot locking element could 35 or this sleeve part 36 be made of a sheet metal construction.

In any case, the pivot locking element 35 or its sleeve part 36 concentric about the spigot element 20 arranged around.

The swing locking element 35 designed two in the swing direction 32 respectively. 33 spaced abutment surfaces arranged 37 and 38 out (see in particular 4 ), against which the pivot lever element 21 can strike when in free-wheeling direction 32 or in the reverse direction 33 around the axis of rotation 26 is pivoted.

By means of the upper stop surface 37 can be prevented, the pivot lever element 21 is pivoted too far up and here, for example, in an approximately vertically upward position (not shown separately here) accidentally stops, causing the risk of injury to a person sitting on the seat part would be significant.

By means of the lower stop surface 38 can be prevented, the pivot lever element 21 self-unintentionally in the substantially vertically downwardly oriented position 34 shifted into it. In this respect, the lower stop surface 38 substantially horizontally on the vehicle seat 1 aligned. Thus, it runs in a horizontal plane 39 , so that the pivot lever element 21 also in a related rest position 39A also aligned horizontally when on the bottom stop surface 38 rests.

The pivot lever element 21 or its Hebelarmteil 30 Can easily handle the two stop surfaces 37 respectively. 38 communicate because the lever arm part 30 on its outer surface 40 a lead 41 in the form of a bridge part 42 as shown in the illustration according to the 3 is shown.

This lead 41 or its web part 42 extends with respect to the axis of rotation 26 radially in the longitudinal direction 43 of the lever arm part 30 , whereby the web part 42 with its long side and thus advantageous with large surfaces on the stop surfaces 37 respectively. 38 can strike.

In this respect, the lead makes 41 a from the axis of rotation 26 of the journal element 20 radially extending web part 42 out.

It is understood that the lead 41 on both sides of the pivot lever element 21 may be provided to the pivot lever element 21 if necessary, with two sides on the journal element 20 to attach, thereby simply reversing the freewheeling or locking directions 32 respectively. 33 to obtain, and on the one hand to increase the spring preload on the other hand, to be able to reduce.

Accordingly, each is a projection 41 on two opposite sides 40A and 40B of the pivot lever element 21 arranged.

In this particular embodiment, however, the freewheeling or locking function of the freewheeling and locking member, not shown here, of the pivot lever element 21 by means of a switch button 44 (see in particular 4 ), so that the pivot lever element 21 advantageously always on the journal element 20 can remain arranged even when the freewheel direction 32 and the reverse direction 33 should be reversed.

Advantageously, in the present case, the projection 41 and the receiving opening 31A for receiving the spigot element 20 on the same side 40A of the pivot lever element 21 arranged. Thus stands the projection 41 in the direction of the pivot locking element 35 over the surface of the pivot lever element 21 before, so constructively a simple interaction with the pivot locking element 35 is guaranteed.

To have a very good investment length on the stop surfaces 37 and 38 to be able to provide, has the stop surface 37 but also the stop area 38 a radially to the axis of rotation 26 of the pin member 20 extending height 45 (Here only as an example with regard to the upper stop surface 37 drawn, see 4 ) of 5 mm.

So that the pivot lever element 21 for a person sitting on the vehicle seat manually well below the seat part 4 and in front of the frame part 6 is tangible, stands the pin shaft element 20 far enough over the front cross member 23 outward. So the lead 41 or its web part 42 nevertheless safe to operate with the anti-sway element 35 can communicate, the pawl securing element has 35 a longitudinal extension 46 of 50 mm, with the longitudinal extent 46 in alignment with the journal element 20 runs.

The swing locking element 35 or its sleeve part 30 indicates at its periphery 47 still a Schwenknut 48 on, which is in the swing directions 32 respectively. 33 arcuate about the axis of rotation 26 of the journal element 20 extends.

So that the pivot lever element 21 not accidentally or unintentionally from the spigot shaft element 20 may fall off, includes the adjustment 7 still a captive in the form of a screw element 50 , which in one at the Vierkantendteil 28 provided blind hole thread 51 is screwed in (see 4 ).

It goes without saying that the embodiment described above is merely a first embodiment of the vehicle seat equipped with a pivot securing element according to the invention. In this respect, the embodiment of the invention is not limited to this embodiment.

All disclosed in the application documents features are claimed as essential to the invention, provided they are new individually or in combination over the prior art.

LIST OF REFERENCE NUMBERS

1

vehicle seat

2

Nutzkraftfahrzeugsitz

3

commercial vehicle

4

seat part

5

Backrest part

6

frame part

7

adjustment

8th

spring elements

9

spring assembly

10

Weight and / or height adjustment device

11

Scherenteil

12

seat-side component group

13

Body-side component group

14

height

15

body floor

20

PTO element

21

Pivoting lever element

22

drilling

23

front cross member

24

Outside

25

inner end

26

axis of rotation

27

outer end

28

Vierkantendteil

30

lever arm

30A

receiving opening

31

Inner head part

32

Freewheeling direction

33

reverse direction

34

vertically downwards oriented position

35

Swivel locking element

36

sleeve part

37

upper stop surface

38

lower stop surface

39

WL

39A

rest position

40

outer surface

40A

first page

40B

second page

41

head Start

42

web member

43

longitudinal extension

44

toggle

45

height

46

longitudinal extension

47

scope

48

swinging groove

50

screw element

51

Blind hole

Claims (11)

Vehicle seat ( 1 . 2 ) with a seat part ( 4 ), with a backrest part ( 5 ), with a frame part ( 6 ) and with an adjustment device ( 7 ) for adjusting a spring preload of a weight and / or height adjustment device ( 10 ), in which the adjusting device ( 7 ) via the frame part ( 6 ) Outside ( 24 ) and about a rotation axis ( 26 ) rotatable spigot shaft element ( 20 ) and a to the PTO shaft element ( 20 ) attachable manually operable and with a freewheel about the axis of rotation ( 26 ) freely rotatable pivot lever element ( 21 ) with a lever arm part ( 30 ), characterized in that the pivot lever element ( 21 ) one opposite the Hebelarmteil ( 30 ) rotatable head inner part ( 31 ) for receiving the spigot element ( 20 ), wherein between the Hebelarmteil ( 30 ) and the head part ( 31 ) an acting in the direction of rotation freewheeling and locking member is arranged interactively, wherein the pivot lever element ( 21 ) in pivoting directions ( 32 . 33 ) about the axis of rotation ( 26 ) relative to the frame part ( 6 ) on a pivot locking element ( 35 ) is fixed, wherein the pivot locking element ( 35 ) two in the pivoting direction ( 32 . 33 ) spaced abutment surfaces ( 37 . 38 ), against which the pivot lever element ( 21 ) can strike. Vehicle seat ( 1 . 2 ) according to claim 3, characterized in that the stop surfaces ( 37 . 38 ) a radially to the axis of rotation ( 26 ) of the journal element ( 20 ) extending height ( 45 ) of more than 2 mm or more than 5 mm. Vehicle seat ( 1 . 2 ) according to one of claims 1 to 4, characterized in that the pivot locking element ( 35 ) at least partially concentric about the spigot element ( 20 ) is arranged around. Vehicle seat ( 1 . 2 ) according to one of claims 1 to 5, characterized in that the pivot locking element ( 35 ) a longitudinal extent ( 46 ) in alignment with the journal element ( 20 ) of more than 20 mm or more than 50 mm. Vehicle seat ( 1 . 2 ) according to one of claims 1 to 6, characterized in that the anti-sway element ( 35 ) a sleeve part ( 36 ), wherein the sleeve part ( 36 ) at its periphery ( 47 ) a pivoting groove ( 48 ) into which a corresponding one of the lever arm part ( 30 ) trained lead ( 41 ) is engageable. Vehicle seat ( 1 . 2 ) according to claim 7, characterized in that the pivoting groove ( 48 ) in the pivoting direction ( 32 . 33 ) arcuately about the axis of rotation ( 26 ) of the journal element ( 20 ). Vehicle seat ( 1 . 2 ) according to one of claims 1 to 8, characterized in that the lever arm part ( 30 ) on its outer surface ( 40 ) at least one with a on the frame part ( 6 ) arranged Schwenksicherungselement ( 35 ) corresponding projection ( 41 ) having. Vehicle seat ( 1 . 2 ) according to claim 9, characterized in that in each case a projection ( 41 ) on two opposite sides ( 40A . 40B ) of the pivot lever element ( 21 ) are arranged. Vehicle seat ( 1 . 2 ) according to claim 9 or 10, characterized in that the projection ( 41 ) and a receiving opening ( 31A ) for receiving the spigot element ( 20 ) on the same page ( 40A ) of the pivot lever element ( 21 ) are arranged. Vehicle seat ( 1 . 2 ) according to one of claims 9 to 11, characterized in that the projection ( 41 ) in longitudinal extension ( 43 ) of the lever arm part ( 30 ) radially extending web part ( 42 ) designed. Commercial vehicle ( 3 ), in particular agricultural utility vehicle, with at least one vehicle seat ( 1 . 2 ), characterized by a vehicle seat ( 1 . 2 ) according to any one of the preceding claims.

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