EP2452031A1

EP2452031A1 - Exterior door handle, in particular for vehicles

Info

Publication number: EP2452031A1
Application number: EP10736961A
Authority: EP
Inventors: Christian Bresser; Andreas Ruta; Reinhold Mathofer
Original assignee: Huf Huelsbeck and Fuerst GmbH and Co KG
Current assignee: Huf Huelsbeck and Fuerst GmbH and Co KG
Priority date: 2009-07-09
Filing date: 2010-06-04
Publication date: 2012-05-16
Also published as: WO2011003376A1; DE102009032324A1; CN102472056A; CN102472056B

Abstract

The invention relates to an exterior door handle, in particular for vehicles. Said exterior door handle comprises a handgrip, which, upon actuation, can be used to open the door and which has a first actuation surface. The invention further relates to a conversion element, such as a lever, having a second actuation surface. When the handgrip is actuated, the two actuation surfaces can be brought into operative connection with each other, whereby the conversion element can also be moved by the actuation of the handgrip. According to the invention, the two actuation surfaces are designed in the form of parts of cycloids or of parts of involutes.

Description

Outside door handle, especially for vehicles

The invention relates to an outside door handle, in particular for vehicles "referred to in the preamble of claim 1. Such exterior door handles are nowadays used in almost every door of every vehicle, especially in automobiles.

So that the vehicle door can be opened upon actuation of the handle, this actuating movement must be passed on to a lock located in the door. This is usually done via a conversion element, such as a lever, via which then the movement of the handle is forwarded. For this purpose, both the handle and the conversion element have actuating surfaces which cooperate in the actuation case in order to transmit the movement of the handle to the conversion element.

In known devices of this type, an approximately cylindrical pin is provided on the conversion element while the handle is about an approximately circular. or circular segment-shaped element. The inner radius of this element represents the first actuating surface, while the second actuating surface is formed by the outer side of the cylindrical pin. Upon actuation of the handle, these two actuating surfaces now move together and thus transfer the actuating movement of the handle to the conversion element.

A disadvantage of this known arrangement, however, is that the transmission ratio between the two components varies. Even at low manufacturing tolerances can occur as strong fluctuations in the operating force. The power losses occurring due to the friction of the two actuating surfaces are also very different. An operator, who operates the handle to open the door, thus often experiences a hook of the handle and must apply very different forces during the operation, so that again and again sections occur where on the one hand the operation is easy to carry out and spent little force and on the other hand there are sections where a stronger force is required to operate the handle. This is uncomfortable for the operator. In addition, the production of components is significantly more expensive, since very narrow tolerance ranges must be met.

The object of the invention is therefore to improve an outside door handle of the type mentioned above so that the forces required for the operation of the handle are as uniform as possible and the production can be carried out more cost-effectively, since the components are not so sensitive to tolerances. This object is solved by the characterizing features of claim 1, which have the following special significance.

The actuating surfaces are in the form of parts of cycloids or parts of involutes. Due to this special shape, the handle and the conversion element have a constant transmission ratio over the entire actuation process. Also the power loss through between the Actuating surfaces occurring sliding friction is more constant. As a result, the operation of the handle is more comfortable and comfortable for an operator. Furthermore, the actuating surfaces and thus also the handle and the conversion element are less sensitive to manufacturing tolerances. This is the case in particular when using actuating surfaces in the form of involute parts. The production can be carried out more cheaply. In one particular embodiment, one actuating surface is in the form of part of an epicycloid and the other actuating surface is in the form of a part of a hypocycloid. It is irrelevant which of the two actuating surfaces which form.

In a further preferred embodiment, both actuating surfaces in the form of involutes, in particular of circle involutes. This makes the components particularly insensitive to manufacturing and assembly tolerances.

Further advantages and embodiments of the invention will become apparent from the following description, the subclaims and the drawings. In the figures, the invention is shown in one embodiment. Show it:

Fig. 1: a handle according to the invention in side view

Fig. 2: the handle of Fig. 1 in a perspective view

Fig. 3: an inventive conversion element in side view

Fig. 4: the conversion element of Fig. 3 in perspective

presentation

Fig. 5: a built-in outside door handle with handle and

conversion element Fig. 6: an illustration of the representation of an epicycloid

Fig. 7: an illustration of the representation of a hypocycloid

8 shows a clarification of the representation of a circle involute

Figures 1 and 2 show a handle according to the invention in a preferred embodiment. This handle is intended for a folding handle. Of course, the invention can also be used with pull handles or other types of handles.

On the handle 10, the first actuating surface 11 can be seen laterally. This has in the present embodiment, the shape of a part of a Kreisvolvente V.

Figures 3 and 4 show the conversion element 20, which is designed here as a lever. It can be seen here, the second actuating surface 21, which also has the shape of a part of a Kreisvolvente V. Furthermore, one recognizes the connection point 22 for a transmission element not shown here in detail. This transfer member serves to transmit the movement performed by the handle 10 during operation by means of the two actuating surfaces 11, 21 and the conversion element 20 via the transfer member to the lock located on the door 30. Here are often used as transmission links linkage or Bowden cables. However, other transmission elements are conceivable.

In Figure 5, the interaction of the handle 10 with the conversion element 20 is now shown. The two Kreisvolventenförmigen actuating surfaces 11 and 21 touch and thus are in operative connection. The components are shown in a door 30, wherein the handle 10 on the outside 31 of the door 30 can be grasped by an operator. The figure shows the handle 10 during actuation. The actuating movement of Handle 10 is transmitted via the first actuating surface 11 to the second actuating surface 21 of the conversion element 20, whereby the conversion element 20 moves. If a transmission element is now connected to the connection point 22, this movement can be forwarded further to the lock in the door 30 and the door 30 can be opened.

FIG. 6 now shows the construction or construction of an epicycloid E. This can be described by a point P, which moves with it when the rolling circle K rolls on the outer circumference of the guide circle L. The point P can, as shown in FIG. 6, lie directly on the circumference of the rolling circle K, but also at any point inside or outside the rolling circle K. In order to calculate the epicycloid E, which forms the epicycloidal actuating surface 11, 21, the following formulas are used: x = (a + b) cos φ - λa ^• cos ((a + b) φ / a)

y = (a + b) sin φ - λa ^• sin ((a + b) φ / a)

The values of x and y refer to the illustrated Cartesian coordinate system. The zero point O is located in the center of the circuit L with the radius b. The rolling circle K has the radius a. The point P which describes the epicycloid E, is located a distance λa far from the center M of the pitch circle K. In the present embodiment, the distance between the center M of the pitch circle K and the point P exactly the radius a of the pitch circle K, since the Point P is located directly on the circumference of the pitch circle K. The angle φ is formed between the positive x-axis and abscissa and a straight line through the origin O of the coordinate system and the center M of the pitch circle K. The angle φ thus changes with the rolling of the rolling circle K on the outer circumference of the circuit L.

Figure 7 shows an illustration of a hypocycloid H. This can be described by a point Q, which moves with, when the pitch circle K on the Inner circumference of the circuit L rolls. The point Q may be, as shown in Figure 7, on the circumference of the pitch circle K but also at any point within or outside the pitch circle K. The Hypozykloide H, which forms the hypocycloidal actuating surface 11, 21, can be calculated as follows : x = (b - a) cos φ + λa ^• cos ((b - a) φ / a)

y = (b - a) sin φ - λa ^• sin ((b - a) φ / a)

The values of x and y relate again to the illustrated Cartesian coordinate system, with the zero point O of the coordinate system being in the center of the control circuit L. The guide circle L has the radius b, while the pitch circle K has the radius a. The distance between the center M of the pitch circle K and the point Q, which describes the hypocycloids, is λa. In the illustrative example shown in Figure 7, the point Q lies exactly on the circumference of the pitch circle K, so that the distance λa is equal to the radius a of the pitch circle K. The angle φ describes the angle between the positive x-axis or abscissa and a straight line, which is defined by the zero point O of the coordinate system and the center M of the pitch circle K. The angle φ thus changes during the rolling of the rolling circle K on the inner circumference of the circuit L.

In a particularly preferred embodiment, the radius a of the rolling circle K is less than or equal to 200 mm. This value has proven to be particularly advantageous.

The actuating surfaces 11 and 21 may also both have the shape of a part of an involute V. These are preferably parts of Kreisvolventen. These can be described by a tangent to the circle moving along the circumference. In a Cartesian coordinate system, the points of the circle involute are calculated as follows: x = r ^• cos ß + ^• sin RSS ß

y = r ^• sin ß - rs ^• cos ß

The zero point O of the coordinate system is located in the center of the output circle Z with radius r. The angle β is formed by the positive abscissa or x-axis and a straight line through the center O of the output circle Z and the point T at which the tangent is applied to the output circle Z at this time. The angle β thus changes while the point T on the circumference of the output circle Z wanders along and so the involute V is formed.

It has proved to be particularly advantageous in this case if the radius r of the output circle Z is less than or equal to 200 mm. In this case, it is also possible that the two output circuits Z of the circle-involute parts of the actuating surfaces 11, 21 have different radii r.

Finally, it should be pointed out that the embodiments shown here are merely exemplary implementations of the invention. This is not limited to this. Rather, modifications and modifications are possible.

LIST OF REFERENCE NUMBERS

10 handle

11 First actuating surface

20 conversion element

21 Second actuating surface

22 Connection point for transmission element

30 door

31 outside of 30

a radius of the rolling circle K

b radius of the circuit L

E epicycloids

H hypocycloids

K pitch circle

L circuit

M Center of the circle K

O zero point of the coordinate system

P point describing the epicycloids

Q point describing the hypocycloids

r Radius of the output circle A for the involute calculation

T point at which the tangent is applied to the output circle A.

V involute

Z output circuit

ß Angle for the involute calculation

λa amount of the distance from M to P or Q

φ angle for the cycloid calculation

Claims

claims

1. outside door handle, in particular for vehicles, with a handle (10) which can serve to open the door (30) and which indirectly or directly a first actuating surface (11) and with a conversion element (20), such as a Lever having a second actuating surface (21), wherein upon actuation of the handle (10), the two actuating surfaces (11, 21) are engageable with each other, whereby upon actuation of the handle (10), the conversion element (20) movable is characterized in that the two actuating surfaces (11, 21) are in the form of parts of cycloids (E, H) or parts of involutes (V).

2. outside door handle according to claim 1, characterized in that an actuating surface (11, 21) has the shape of a part of an epicycloid (E) and the other actuating surface (21, 11) in the form of a part of a Hypozykloiden (H).

3. outside door handle according to claim 2, characterized in that the epicycloids (E), of which the epicycloidal actuating surface (11, 21) is a part calculated as follows: x = (a + b) cos φ - λa ^• cos (( a + b) φ / a)

y = (a + b) sin φ - λa ^■ sin ((a + b) φ / a) where the values of x and y refer to a Cartesian coordinate system with zero (O) at the center of the circuit (L), a the radius of the Rolling circle (K), b is the radius of the guide circle (L), λa the amount of the distance from the center (M) of the rolling circle (K) to the point (P), which describes the epicycloids (E) and φ the angle between a straight line through the center point (M) of the rolling circle (K) and the zero point (O) of the coordinate system and the positive abscissa (x-axis).

4. outside door handle according to claim 2 or 3, characterized in that the hypocycloids (H), of which the hypocycloidal actuation surface (11, 21) is a part calculated as follows: x = (b - a) cos φ + λa ^• cos ((b - a) φ / a)

y = (b - a) sin φ - λa ^• sin ((b - a) φ / a) where the values of x and y refer to a Cartesian coordinate system with zero (O) at the center of the circuit (L), a the radius of the pitch circle (K), b the radius of the guide circle (L), λa the amount of the distance from the midpoint (M) of the pitch circle (K) to the point (Q) describing the hypocycloids (H) and φ is the angle between a line through the center (M) of the pitch circle (K) and the origin (O) of the coordinate system and the positive abscissa (x-axis).

5. outside door handle according to one of claims 3 to 4, characterized in that the radius (a) of the rolling circle (K) is less than or equal to 200 mm.

6. outside door handle according to claim 1, characterized in that both actuating surfaces (11, 21) have the shape of a part of an involute (V).

7. outside door handle according to claim 6, characterized in that it is the parts of involutes (V) to parts of Kreisvolventen.

8. outside door handle according to one of claims 6 or 7, characterized in that each of the involutes (V), of which the involute actuating surfaces (11, 21) each represent a part, calculate as follows: x = r ^• cos ß + rß ^• sin ß

y = r ^• sin ß - rß ^• cos ß where the values of x and y refer to a Cartesian coordinate system with zero point (O) at the center of the output circle (Z), r is the radius of the output circle (Z) and β is the angle between a straight line through the point (M) at the output circle (Z) where the tangent is currently located and the origin (O) of the coordinate system and the positive abscissa (x-axis).

9. outside door handle according to claim 8, characterized in that the radius (r) of the output circuit (Z) is less than or equal to 200 mm.

10. outside door handle according to one of claims 7 to 9, characterized in that the two output circuits (Z) of the Kreisvolvententeile the actuating surfaces (11, 21) have different radii (r).

11. exterior door handle according to one of claims 1 to 10, characterized in that the conversion element (20) with a transmission member, such as a linkage or a Bowden cable, via a corresponding connection point (22) is connectable, which the movement of the conversion element (20) a lock present on the door (30) transmits and thus makes it possible to open the door (30).