DE4138316C2 - Slow-acting rotating shaft device - Google Patents

Description

The invention relates to a rotary shaft device for Joining two against the shear resistance of a viscous fat tes parts pivotable relative to each other.

U.S. Patent 4,199,075 describes a waste container, the Cover over a torsion bar as a hinge pin with the loading container body is connected. The torsion bar is on the one hand non-rotatably connected to the lid and on the other hand in a Container arranged pivot bearing. The torsion bar is angled beyond the pivot bearing, the angled Part hits a stop when the lid is in one ner open positions essentially vertically upwards stands, and the torsion bar through this stop with egg torque is applied when the lid is closed. When the lid is opened, the torque is relieved Torsion bar instead, so that in the limit by the stop th angular range facilitates the opening movement and the Closing movement is so difficult that the lid in torque-loaded angular range of the pivoting movement thereof is prevented from falling uncontrollably. Located however, the lid then becomes essentially vertical len position and should then be opened further, see above this must be done by hand and with constant hold on the lid happen because the torsion bar is no longer in this angular range is loaded with torque. However, this is for many application purposes not optimal.

US Pat. No. 2,395,456 describes a hinge joint for connection that of an upward opening door in a tank or the like, which contains a rotary shaft assembly as a hinge pin. Inner  is half of a hollow shaft body of this rotary shaft arrangement a torsion spring in the form of a leaf spring assembly in such a way arranges that one end of this torsion spring rotates with the door and the other end of this torsion spring rotatably with the tank connected is. The torsion spring is in the entire angle range of the pivoting movement of the door Relieved, whereby a zero point is provided at which reverses the torsion direction of the torsion spring. That zero point is placed so that the door in an open position in the we stands vertically upwards. When closing the door the torsion spring is thus loaded with a torque, which the force for the opening movement of the door by one in the tank workers significantly reduced. The torsion spring beyond the vertical position, i.e. H. when dropping the Door on top of the tank, in the opposite direction torque burdens, which in turn means lifting the door during the closing process facilitated. With this configuration, however, the torso onsfeder constantly subjected to alternating stress, what reduces the lifespan or what the use of high quality materials required what for many application purposes is not acceptable.

A slow-acting rotary shaft device, as used for example for rotatably mounting part of a joint device of a compact box for makeup, a radio cassette, a dashboard of a vehicle and the like, is described in the unpublished DE 41 32 568 A1. One type of such a slow-acting rotating shaft device comprises a shaft 3 which rotatably supports a rotatable part 1 which rotates relative to a fixed part 2 , as shown in FIG. 7.

The shaft 3 (for example, a torsion bar 4) comprises according to FIGS. 8 and 9 a hollow shaft body 31, cap members 32 and 33 which are rotatably attached pointing to the two sides of the shaft body 31 to the outside, a torsion member which is locked with an end hook part 41 in the shaft body 31 , while a further end hook part 42 is locked in the cap part 33 , and a viscous grease (not shown) which is enclosed between the shaft body 31 and the cap parts 32 and 33 .

The shaft body 31 is stepped, the smaller-diameter shaft sections 31 b, on which the caps parts 32 and 33 are attached to the outside and are thereby rotatably mounted, are formed on both sides of a large-diameter shaft section 31 a. A slot-shaped opening 34 extending in the longitudinal direction is formed in the shaft 3 . The large-diameter shaft section 31 a is provided with a projecting wedge section 35 . The cap members 32 and 33 are designed as a cylinder, each le Bodentei and have in each case approximately to the outer diameter of the small shaft portion 31 b corresponding inner diameter and an outer diameter of the large diameter portion 31 a corresponding outer diameter. Each cap part 32 and 33 is provided with a protruding wedge portion 37 and 38 on its outer circumference.

At the bottom of the cap part 33 , a slot recess 36 is formed. The cap parts 32 and 33 are facing outward to the respective small-diameter sections 31 b, the circular recesses 32 a and 33 a of the cap parts 32 and 33 and the circular ribs 31 c in each by small-diameter section 31 b each assembled in such a way the that they can not come off, so that the cap parts rotatably cooperate with the shaft body 31 .

In the connected state, the torsion bar 4 is inserted in the through hole 34 of the shaft body 31 and a hook portion 41 in the through hole 34 defined while the other end-side hook portion 42 is firmly connected with the recess 36 of the cap portion 33, wherein the viscous grease depending weils b between the cap parts 32, 33 and the diameter klei NEN shaft portions 31, 31 is included b.

The shaft 3 assembled in this way is inserted into a pivot bearing part according to FIG. 10 in that the rotating part 1 is arranged upright at an angle of 90 ° with respect to the fixed part 2 , so that the keyways (not shown), which on the respective Bearing parts of the rotatable part 1 and the fixed part 2 are provided, are associated with each other accordingly. Through this one set the shaft 3 positioned the large-diameter Wellenab section 31 a of the shaft body 31 in the bearing part 21 of the fixed part 2 , arranges the cap parts 32 and 33 in the rotatable bearing parts 11 and 12 of the rotatable part and guides the respective wedge 35 , 37 and 38 in the splines (not shown), which are formed on the bearing part 21 and the rotatable bearing parts 11 and 12 respectively, whereby the diametrically large shaft portion 31 a and the cap parts 32 and 33 each because of the bearing part 21 and the rotatable bearing parts 11 and 12 are rotatably arranged.

In this slow-acting rotary shaft device designed in the manner described above, an opening torque is stored in the torsion member 4 in that the rotatable part 1 is rotated from a neutral position b into the closed position, in which the rotatable part 1 is fixed to the fixed part 2 with a releasably fixed one Position is set in the fully closed position a, in which the spring force is maximal (see Fig. 10). If the locking device or locking device is then released, the rotating part 1 rotates in the opening direction by the spring force of the torsion element 4 . During this rotation, a shear resistance occurs due to the viscous fat, and the rotating part 1 rotates at a low speed and can be stopped in the neutral position b despite the torque load by the torsion member 4 .

Thus, the conventional slow-acting rotary shaft device can effectively perform a slow-acting process in a first angular range α1 from the fully closed position a of the rotating part 1 to the neutral position b, as shown in FIG. 10.

In such a joint device, a free stopping area is to be improved, in which the rotating part 1 can be held at any desired location in a further angular range α2, from the neutral position b to the fully open position c, with a maximum angular range α of the rotating part 1 of about 135 °, as shown in Fig. 10 ge. This condition cannot be met when using the usual slow-acting rotary shaft device.

Because when the rotating part 1 is rotated from the neutral position b to the fully open position c, the torsion member 4 is twisted in the shaft 3 from the neutral position and the torque is stored in the torsion member 4 . The stored moment acts such that it returns the rotating part 1 in the direction of the neutral position b against the shear resistance of the viscous fat. Therefore, it is impossible to stop the rotating part 1 at any point.

The invention has for its object a slow-acting Provide rotary shaft device, on the constructive an angular range without torque load of the Torsion member is provided in which the pivoted parts can be stopped at any point.

The object is achieved by the features specified in claim 1 solved.

The inventive arrangement of an expanded keyway, in which a wedge section engages with play is on kon structurally simple way created a way to parts  without torque load of the torsion member relative to each other to pivot. By arranging the stop in the groove and the predetermined game becomes the no-load panning movement is predetermined and therefore cannot get out of control The viscous fat of the slow-acting rotating shaft arrangement causes a shear resistance, which the user can be easily overcome, but is sufficient Gravity-related wastes not initiated by the user prevent kungen.

The shaft body and the cap parts are each connected to the first and second part, wherein one of the two parts (the first or the second part) rotates about the axis of rotation of the shaft 3 with respect to the other part. This rotary movement he stretches in one embodiment over the torsion areas in negative and positive directions of the torsion member. The relative rotation of the first or of the second part in the torsion area in the positive direction takes place through the moment of the torsion member. Despite this torque load, however, the rotational movement occurs at a low speed due to the shear resistance of the viscous grease that is trapped between the shaft body and the cap parts.

The relative rotation of the first or second part in the area in which the torsion link from twisting in positive direction to the twisting in the negative direction convicted takes place within the game between the two ten or the first part and the cap part or the waves body, the torsion member despite an external load force is not involved. If the external force on this Part is lifted, it comes in in any position follow the frictional resistance on the pivot bearing part and Shear resistance of the viscous fat to a standstill. The rela tive rotary movement between the first or the second part in Torsional range in the negative direction exceeds the Laufbe realm of the wedge section in the wedge expanded by play  nut and then the torsion member is twisted in ne negative direction. The turned part can be when the external force load on the above part is lifted, stop in any position by that a compound force from the torque of the rotation partly and the shear resistance of the viscous fat in the same important with the moment of the torsion link.

Thus the relative rotation of the first or the two takes place th part in the rotation range in the negative direction over the Running area out. Therefore, it is possible to change the torsion angle to make the torsion link smaller in the negative direction and Furthermore, the entire range of rotation in the negative direction in Form an area with free stopping, in within the rotating part at any point Abolition of the external force can stop.

Further details and advantages of the invention emerge from the following description of preferred embodiment shapes with reference to the accompanying drawing. In this shows:

Fig. 1 (a) shows a longitudinal section of a shaft, which is a part of a slow-acting rotary shaft device according to the invention,

Fig. 1 (b) is a left side view thereof,

Fig. 2 (a) aa is a sectional view along the line,

Fig. 2 (b) is a sectional view taken along line bb,

Fig. 2 (c) is a sectional view taken along the line cc,

Fig. 2 (d) is a sectional view taken along line dd,

Fig. 2 (e) is a sectional view taken along line ee;

Fig. 3 (a), 3 (b) and 3 (c) is a plan view, a rear view and a side view of a hinge device according to the invention with the rotary shaft means,

Fig. 4 (a) means a side view of the neutral position of the joint,

Fig. 4 (b) is a side view showing the fully open state constantly,

Fig. 5 is a cross section corresponding to Fig. 4 (a),

Fig. 6 is a side view of a further preferred execution form according to Fig. 4 (a),

Fig. 7 is a perspective view of a tung Gelenkeinrich in which a conventional slow-acting rotary shaft means is provided,

Fig. 8 shaft means is an exploded longitudinal sectional view of the slow-acting rotary defined above,

Fig. 9 (a) is a right side view of a cap portion of the aforementioned shaft,

Fig. 9 (b) is a sectional view taken along line bb in Fig. 8,

Fig. 9 (c) is a left side view of another cap portion of the aforementioned shaft, and

Fig. 10 is a side view to illustrate the way of working of the above-mentioned joint device.

In these preferred embodiments are the same or similar Liche parts as in the usual device with the same loading provide traction marks.

In Figs. 1 and 2 3 comprises the shaft according to this preferred embodiment a hollow shaft body 31, cap members 32 and 33 which are attached rotatably to the outside of the two sides of the shaft body 31. It is a torsion member 4 , one end hook section 41 of which is fixed in the shaft body 31 and the other end hook section 42 of which is fixed in the cap part 33 , and a viscous grease 5 is provided which is enclosed between the shaft body 31 and the cap parts 32 and 33 . The shaft body 31 is graduated and det with two small-diameter shaft sections 31 b see ver, on the outside of the cap parts 32 and 33 are rotatably attached to both sides of a central diameter shaft section 31 a. In the sem shaft body 31 , a through opening is provided, which is formed by a slot opening 34 a, which is located on one side of the shaft body 31 , and by a circular opening 34 b, which is continuously connected to the slot opening 34 a and open to the other end side is. Furthermore, a wedge 35 is provided on the outside of the large diameter section 31 a.

The cap parts 32 and 33 are designed as cylinders, each of which has a bottom and are attached to the small-diameter shaft sections of the shaft body 31 from the outside. At the bottom of a cap part 33 , a slot-shaped Ausneh tion 36 is provided.

The outer diameter of the cap parts 32 and 33 are the same size as the large-diameter shaft sections 31 a of the Wellenkör pers 31st The outer sides of the cap parts 32 and 33 are each provided with wedge sections 37 and 38 .

The viscous fat 5 is applied to the outer surface of the small-diameter shaft portions 31 b and 31 b when the cap penteile 32 and 33 are placed, and it is enclosed between the cap parts 32 and 33 and the respective small-diameter shaft portions 31 b and 31 b if the caps parts 32 and 33 are attached from the outside.

In the assembled state, the torsion member 4 is inserted into the through opening of the shaft body 31 and installed in the shaft 3 in that an end hook portion 41 is fixed in the slot opening 34 a, while the other end portion 42 in the slot-shaped recess 36 of the cap part 33 thereby it is determined that it protrudes from the through opening of the shaft body 31 . The shaft 3 constructed in this way forms a slow-acting rotary shaft device for use in a joint 60 , as shown in FIG. 3.

The joint 60 is designed such that the part 1 is rotatable about the shaft 3 with respect to the part 2 . A bearing section 11 , through which the shaft 3 passes, is provided on one side surface of the rotating part 1 . The upper surface of the Lagerab section 11 is formed as a wedge-shaped surface 11 a, while the upper end surface of the surface 11 a is formed as a stop surface 13 .

Furthermore, two bearing sections 21 and 22 are formed on the fixed part such that the bearing section 11 of the rotating part 1 is umgrif fen, while between the bearing sections 21 and 22 a bearing surface 23 is provided against which the stop surface 13 of the rotating part 1 can come to rest.

In this joint 60 , the rotating part 1 assumes its fully open position, which is shown in Fig. 4 (b), in which the rotational movement by the abutment of the abutment surface 13 against the abutment surface 23 via that shown in Fig. 4 (a) Neutral position is limited, in which the rotating part is arranged substantially vertically opposite the closed state, which is shown in Fig. 3 (c). The angle of rotation range α, starting from the closed state of the rotating part 1 to the fully open state, amounts to approximately 135 °.

The shaft 3 is inserted into the bearing section of the rotating part 1 in the neutral position of the rotating part 1 .

In other words, this means that the Wellenkör by 31 and the cap parts 32 and 33 are each attached to the rotatable rotating part 1 and the fixed part 2 , while the rotating part 1 is arranged vertically upright, so that the through openings with the keyway each are aligned, which are attached to the bearing portions 21 and 22 of the fixed part and the bearing portion 11 of the rotating part 1 . The shaft 3 is inserted into the through hole, the key section 37 of the cap part 32 , as well as the key section 35 of the shaft body 31 and the key section 38 of the cap part 33 in the keyway of the bearing section 22 , in the keyway of the bearing section 11 or in the keyway of the bearing section 21 are used in each case. The splines of the bearing sections 21 and 22 , which are designed in one piece on the fixed part 2 , are such that they are assigned to the spline sections 37 and 38 of the cap parts 32 and 33 . The bearing portions 21 and 22 with the wedge portions 37 and 38 via the splines, and so with the cap members 32 and 33 are rotationally fixed to the bearing portions 21 and 22 are connected.

Furthermore, the keyway 7 associated with the key section 35 on the bearing section 11 of the rotary part 1 is expanded, as shown in FIG. 5, so that the rotary part 1 can run therein with play in a direction A (opening direction of the rotary part 1 ). Here, when the shaft body 31 (diameter large shaft portion 31 a) with the introduction of the wedge portion into the keyway 7 of the bearing 11 is inserted 35, the shaft body 31 is at the La gerabschnitt 11 is fixed, said moving through the game, the rotary member 1 relative to the shaft body 31 can.

The following is the operation of this preferred embodiment tion form explained in more detail.

The locking state of the large-diameter shaft portion 31 a of the shaft body 31 and the bearing portion 11 of the rotating part 1 is given when the rotating part 1 is in the neutral position ( Fig. 4 (a)).

When the rotating part 1 is rotated from the neutral position in the closing direction (direction B in FIG. 5), the shaft body rotates by 31 in the direction C, as shown in FIG. 2 (c), together with the rotating part 1 . During the rotary movement of the shaft 31 in the direction C in connection with the rotary movement of the rotating part 1 in the closing direction, an end hook portion of the torsion member 4 is twisted in a positive direction, thereby storing energy which rotates the rotating part 1 in the opening direction. This gives the fully closed state, which is shown in Fig. 3 (c). In the completely closed state, the rotating part 1 remains, since suitable locking devices (not shown) are provided accordingly.

Further, when the locked state of the rotating member 1 is released in the fully closed state, the rotating member 1 rotates in the opening direction by the torque of the torsion member 4 . The rotary movement at this time causes a shear resistance of the viscous fat, so that this rotary movement is performed at a low speed despite the torque load on the torsion member 4 . The rotating member 1 stops near the neutral position in Fig. 4 (a). In the neutral position, the torsion member 4 is in an unloaded state. The rotary movement of the rotating part 1 further in the opening direction is then carried out manually.

This rotary movement leads to a rotary movement of the rotating part 1 in direction A in FIG. 5, the rotating part 1 moving in the region of the play of the keyway 7 of the shaft bearing section 11 . This movement is limited by the fact that a stop in the form of a wall 7 a of the keyway 7 comes to rest against the key section 35 , as is entered with a broken line provided with two points in FIG. 5. Since in this rotary movement of the rotating part 1 of the shaft body 31 is not taken along, the torsion member 4 is not twisted and remains in the unloaded state. Thus, the rotating part 1 can be stopped in any arbitrary position by lifting the external force. The resultant second Winkelbe range α3 of the rotating part 1 amounts to approximately 30 °, and the torque of the rotating part 1 is also small in this area. Therefore, the rotational movement of the rotating part 1 can be stopped by the friction between the bearing portion 11 and the large-diameter shaft portion 31 a.

Furthermore, the rotating member 1 is brought into a fully open position ( Fig. 4 (b)) in that a force is brought to the outside effect to rotate this part in the opening direction (direction A in Fig. 5). The rotational movement of the rotary part within this third angular range α4 is connected with a rotation of the shaft body 31 in the direction D according to FIG. 2 (c), and this causes the torsion member 4 to be twisted in the negative direction counter to the direction of rotation of the rotary part 1 in the closing direction . Furthermore, the rotating part 1 can hold in any position by lifting the external force. This is due to the fact that the third angular range α4 of the rotating part 1 is approximately 15 °, and therefore no torque occurs which the rotating part 1 can move back into the neutral position against the action of the viscous fat. So with is the torque of the composite force from the torque of the rotating part 1 in the third angular range α4 and the shear resistance of the viscous fat in the equilibrium state, so that the rotating part 1 can be stopped in any position.

Furthermore, since the torsion angle of the torsion member 4 can be kept small in the negative direction by the arrangement of the third angular range after the second angular range, there is no permanent damage to the torsion onslied 4 in the negative direction.

Another preferred embodiment will be described below explained.

In the further embodiment, the shaft 3 is attached to the pivotable bearing section of the joint device 6 ( FIG. 7), as is customary per se. The cap parts 32 and 33 and the shaft body 31 are each cut to the Lagerab 11 , 12 of the rotating part 1 and the bearing portion 21 of the fixed part 2 attached. The keyway of the bearing section 21 has a shape which corresponds to the key section 35 of the shaft body 31 , so that the shaft body 31 is non-rotatably attached to the bearing section 21 by inserting the key section 35 into the keyway of the bearing section 21 .

Furthermore, a keyway 7 of a bearing section 11 or 12 , which is provided on the rotating part 1 , is formed, as shown in FIG. 6, wherein a game is provided in which the rotating part 1 in direction A (opening direction of the rotating part 1 ) can move relative to the wedge section 38 of the cap part 33 . The cap part 33 , which cuts the Keilab 38 into the keyway 7 of the bearing section 11 with play, is attached to the bearing section 11 .

Furthermore, the keyway of the further bearing section 12 can be designed such that it is adapted to the key section 37 of the cap part 32 , or it can be designed as a keyway with play in the bearing section 12 , analogous to the section 11 of the bearing section. The assembled state essentially coincides with the state of the shaft body 31 shown in FIG. 5 (by means of a shaft section 31 a large in diameter) and the bearing section 11 .

In this preferred embodiment, the rotating part 1 runs in the keyway of the bearing section 11 with play without a torsion of the torsion member 4 in a second angular range α3, which is shown in FIG. 5, while in a third angular range α4 in FIG. 5, the rotating part 1 rotates in the opening direction and the torsion member 4 is twisted in the negative direction in conjunction with the rotary movement of the cap part 33 . Since the rotary part 1 is in the second angular range α3 when the cap part 32 is rotatably attached to the bearing section 12 , under the effect of the shear resistance of the viscous grease, which is enclosed between the cap part 32 and the small-diameter shaft section 31 b of the shaft body, as well as the Frictional force between the cap part 33 and the Lagerab section 11 stopped freely. On the other hand, if the cap member 32 is brought to the bearing section 12 via the keyway 7 with play, the free stopping is obtained in the second Winkelbe range α3 due to the frictional force that is shared between the caps 32 and 33 and the respective bearing sections 11 and 12 .

You also get free stopping in the third angular range Preferred α4 in the same manner as that described above th embodiment.

Since thus also in this preferred embodiment, the torsion member 4 is twisted in the negative direction after the rotating part has passed through the game, the torsion angle of the torsion member 4 in the negative direction can be kept small, and there is no permanent damage to the torsion member 4 on.

As indicated above, the invention enables a part can be rotated, which is in relation to a fe most part rotates, due to the spring force of the gate sions limb and the shear resistance of the viscous fat, so that you have a slow moving speed of that full constantly closed state to the neutral position. It can also be opened in the opening direction within the range of rotation after passing through the neutral position and twisting a rotational movement of the torsion element in the negative direction run so that you have a good and functional articulation tung receives.

Although the torsion link in the negative direction after going through of the game can be twisted in the turning area in opening direction after passing through the neutral position of the torsion winch kel be kept smaller to such an extent that one no permanent damage to the torsion link has so that you can maintain the usual lifespan.

Claims (5)

1. rotary shaft device for connecting two against the shear resistance of a viscous grease ( 5 ) relative to each other ver pivotable parts ( 1 , 2 ), in particular a lid with a container, with a torsion member ( 4 ) and one with a hollow shaft body ( 31 ) and a cap part ( 32 , 33 ) multi-part shaft ( 3 ), one end ( 41 ) of the torsion of the ( 4 ) on the shaft body ( 31 ) and its other end ( 42 ) on the cap part ( 33 , 32 ) is fixed, one of the parts ( 33 , 32 or 31 ) of the shaft ( 3 ) rotatably with one of the pivotable parts ( 2 or 1 ) and the other of the parts ( 31 or 32 , 33 ) of the shaft ( 3 ) with the other pivotable part ( 1 or 2 ) is connected via a key section ( 35 or 37 , 38 ) engaging with play in a keyway ( 7 ), and the key section ( 35 or 37 , 38 ) in the keyway ( 7 ) up to a stop ( 7 a ) is pivotable, so that the two parts ( 1 , 2 ) over a he s th angular range (α1) with torque loading and unloading of the torsion member ( 4 ) and via a second angular range (α3) limited by the key section ( 35 or 37 , 38 ) which can be moved in the keyway ( 7 ) up to the stop ( 7 a) without torque loading and relief of the torsion member ( 4 ) can be pivoted ver relative to each other. 2. Rotary shaft device according to claim 1, characterized in that the key section ( 35 ) engaging in the keyway ( 7 ) is formed on the hollow shaft body ( 31 ). 3. Rotary shaft device according to claim 1, characterized in that the key section ( 37 , 38 ) engaging in the keyway ( 7 ) is formed on the cap part ( 32 , 33 ). 4. Rotary shaft device according to one of claims 1 to 3, characterized in that a third angular range (α4) is provided, which follows the second angular range (α3), the pivoting of the two parts ( 1 , 2 ) in third angular range (α4) under torque loading and unloading of the torsion member ( 4 ) in an opposite direction for loading and unloading in the first angular range (α1). 5. Rotary shaft device according to claim 4, characterized in that the third angular range (α4) by a further impact ( 13 , 23 ) is limited.