DE102015009075B4 - Brake assembly with an axle, a housing part, a first shaft and a driven part - Google Patents

Abstract

Brake assembly having an axis (5), a housing part, a first shaft (1) and a driven part, wherein the first shaft (1) is rotatably mounted relative to the housing part, wherein the axis (5) is fixedly connected to the housing part, wherein an end portion of the shaft (1) bolts (2) are arranged, wherein the respective pin (2) in a respective recess (30) of a receiving part (20) at least partially protruding, wherein a first spring element (21) between the receiving part (20) and the output member is arranged, characterized in that a second spring element (22) is supported on the receiving part (20) and a brake shoe (31) in the direction of the axis (5) pushes out.

Description

The invention relates to a brake assembly having an axle, a housing part, a first shaft and a driven part.

From the DE 20 2011 100 882 U1 is a holding function known.

From the DE 198 45 365 A1 is a switchable Klemmgesperre known.

From the DE 12 30 531 A As the closest prior art, a braking device is known, which has a first spring element, which is arranged between the brake shoes and the cam disc of a drum, and a second spring element is supported on the drum, wherein a pin pushes away from the axis.

The invention is therefore the object of developing a torque-dependent brake assembly.

According to the invention the object is achieved in the brake assembly according to the features specified in claim 1.

Important features of the invention in the brake assembly with an axle, a housing part, a first shaft and a driven part, are that the first shaft is rotatably mounted relative to the housing part, in particular rotatably mounted in the housing part,
wherein the axle is fixedly connected to the housing part,
wherein bolts are arranged at an end region of the shaft,
wherein the respective bolt at least partially protrudes into a respective recess of a receiving part,
wherein a first spring element is arranged between the receiving part, in particular between the outer side of the receiving part, and the driven part,
wherein a second spring element is supported on the receiving part, in particular on the inside of the receiving part, and presses a brake shoe in the direction of the axis.

The advantage here is that torque-dependent braking torque is generated or not. For when the torque exceeds a predeterminable by the dimensioning of the first spring elements threshold, the brake assembly is released and thus the torque completely passed through to the output part. At a torque which falls below the threshold amount, the brake is applied, since the brake shoe is pressed against the axis and thus a frictional contact takes place.

In an advantageous embodiment, the bolts are arranged off-center on the shaft and / or the bolts are arranged on a non-vanishing radial distance,
and / or the bolts are spaced apart in the circumferential direction, in particular regularly. The advantage here is that the torque is passed through eccentrically and is thus passed over a radially movable receiving part. In this way it is possible to switch on or off the brake function.

In an advantageous embodiment, the recess is surrounded by the material of the receiving part in each case, in particular so the boundary of the recess is closed,
in particular, wherein the recess provides play to the bolt in the circumferential direction and in the radial direction. The advantage here is that the boundary of the recess is executable such that upon rotation of the bolt relative to the receiving part of this is radially displaceable. Since the rotational movement must take place counter to the spring force generated by the first spring elements, a correspondingly increasing torque is necessary for a circumferentially increasing rotational position of the bolt relative to the receiving part.

In an advantageous embodiment, the driven part is a shaft or a first toothed part, which engages with a second toothed part. The advantage here is that the transmitted torque is forwarded to a shaft or to a gear stage.

In an advantageous embodiment, the recess has an edge region which has a decreasing radial distance with increasing circumferential angle,
and or
the recess has an edge region which has a decreasing radial distance with decreasing circumferential angle,
in particular, so that a respective bolt with increasing transmitted from the bolt to the receiving part, in particular a threshold thereby exceeding torque presses the receiving part radially outward, so that the brake shoe loses contact with the axis. The advantage here is that the skew of the edge region defines the relationship between relative rotational angle between the bolt and receiving part and torque.

In an advantageous embodiment, the torque introduced by the bolt into the receiving part is transmitted via the first spring element to the driven part,
in particular if the torque exceeds one or the threshold value and / or the brake shoe has no frictional contact with the axis and / or of the axis is spaced. The advantage here is that the brake is torque-dependent controllable.

In an advantageous embodiment, the spring force of the first spring element is directed in a tangential direction,
in particular, wherein the spring force of the further first spring elements is directed parallel or opposite parallel. The advantage here is that the spring forces are directed parallel to each other or oppositely parallel.

In an advantageous embodiment, the respective recess provides the respective bolt a game in the circumferential direction. The advantage here is that the bolt has a free space, where it rests on the boundary of the recess for the transmission of torque. With zero amount of transmitted torque, the receiving member is pushed out radially.

In an advantageous embodiment, the receiving part is movable in a single radial direction. The advantage here is that all receiving parts in the same direction or against the same are movable. Thus, a first receiving part to the axis and a second, viewed from the axis of diametrically opposite lying receiving part of the axis away wegbewegbar.

In an advantageous embodiment, at least one further brake shoe is arranged at the same radial distance as the first brake shoe, wherein the brake shoes are regularly spaced from each other in the circumferential direction,
wherein the further or further brake shoes are respectively held by second spring elements on a further receiving part or on further receiving parts or are,
wherein the receiving parts in the circumferential direction are regularly spaced from each other and are arranged at the same radial distance,
wherein each first spring elements connect a respective receiving part with the driven part. The advantage here is that a larger braking torque can be generated.

Further advantages emerge from the subclaims. The invention is not limited to the combination of features of the claims. For the skilled person, further meaningful combination options of claims and / or individual claim features and / or features of the description and / or figures, in particular from the task and / or by posing the task by comparison with the prior art task.

• In der 1 ist die erfindungsgemäße Bremsanordnung in Schrägansicht dargestellt.
• In der 2 ist die erfindungsgemäße Bremsanordnung in einer anderen Blickrichtung in Schrägansicht dargestellt.
• In der 3 ist die erfindungsgemäße Bremsanordnung in Draufsicht dargestellt.

The invention will now be explained in more detail with reference to figures:

• In the 1 the brake assembly according to the invention is shown in an oblique view.
• In the 2 the brake assembly according to the invention is shown in a different view in an oblique view.
• In the 3 the brake assembly according to the invention is shown in plan view.

As shown in the figures, the shaft 1 driven and with off-center bolts 2 connected. Bolts 2 thus protrude from the axial end portion of the shaft 1 and are regularly spaced circumferentially. In the embodiment, in this case four bolts 2 shown.

Two of the bolts 2 each protrude into a respective recess 30 a first receiving part 20 at least partially into it. The recording part 20 is executed bowl-shaped. And surround the wave 1 only partially, with the receiving part 20 is radially spaced from the shaft 1 ,

Two first spring elements 21 press the recording part 20 to the wave 1 towards, the two first spring elements 21 on the one hand radially outward on the receiving part 20 supported on the other hand on the inner wall of a hollow first gear part 3 ,

At the radial inside of the receiving part 20 are second spring elements 22 supported, which cup-shaped brake shoes on a fixed axis 5 to press. In this case, the surface portion of the axle used as the braking surface is 5 cylindrically shaped, the axis 5 is in this case firmly connected to a housing part, so that while it is aligned coaxially with the shaft 1, but not co-rotating is executed. Preferably, the axis 5 with a housing part of the device rotatably connected, wherein the shaft 1 is rotatably mounted relative to the housing part. Thus, by pressing the brake shoes 31 to the axis 5 a deceleration of the shaft 1 reachable.

wave 1 is for example a rotor shaft of an electric motor or the shaft of a transmission.

Two more bolts 2 are also with the wave 1 connected and in turn each protrude into a respective recess 30 a second receiving part 20 into it. Also the second recording part 20 is made of first spring elements 21 , which at the first toothing part 3 are supported in the direction of the axis 5 pressed down, wherein on the radial inside of the receiving part 20 second spring elements 21 are supported, which in turn a second brake shoe 31 on the axis 5 to press. Here are the other bolts 2 , the second recording part 20 , the first spring elements 21 , the second spring elements 22 and the second brake shoes 31 arranged mirror-symmetrically to the aforementioned corresponding parts.

The first gearing part 3 is engaged with the second gear part 4 , which is connected to a driving shaft.

The recesses 30 are arranged and have such an inner contour that when starting the operation and thus on the shaft 1 initiated increasing torque causes the bolts 2 in the respective recesses 30 of the respective receiving part 30 continue to rotate in the circumferential direction and at a portion of the inner contour of the receiving part 30 abut, which has a decreasing radial distance with increasing circumferential direction. But there the bolts 2 by means of the shaft 1 Coming torque to be further twisted, the receiving parts 20 dodge radially outward. Thus, the brake shoes 31 from the axis 5 removed and the holding brake is canceled. That in the wave 1 initiated torque is thus completely forwarded to the first toothing part 3 and from this to the second gearing part 4 , Because of the respective bolts 2 in the respective receiving part 30 introduced torque is from the spring elements 21 forwarded to the first toothing part 3 and from this to the second toothing part 4 ,

If the torque falls below a threshold value, the bolts push 2 less strongly on the said contour of the recess 30 of the receiving part 20 , Thus, the receiving parts move 20 each again to smaller radial distances and thus the brake shoes 31 against the axis 5 pressed. In this way, then the holding brake is initiated. This holding brake also takes place when no torque is introduced or a lower torque is introduced than the threshold.

The with the bolts 2 cooperating contour of the recess 30 represents a ramp-shaped course, which is suitable for controlling. But it is important that the ramp-shaped course runs steadily, ie with increasing circumferential angle of the radial distance is continuous, ie increases or decreases. Preferably, a monotonic course is realized. The ramp-shaped course starts at a plateau area in which the radial distance is constant in a circumferential angle section. The ramp-shaped course preferably ends in a region which limits the maximum radial distance.

The threshold amount is determined by the spring constant of the first spring elements 21 essentially fixed.

The second spring elements 22 are dimensioned such that when reaching the maximum radial distance of the receiving parts 20 from the axis 5 the brake shoes 31 the axis 5 do not touch. Thus, in regular operation, ie passing a torque amount that is above the threshold amount, no wear is present.

The spring force of the first spring elements 21 is directed parallel or oppositely parallel to a tangential direction. The associated tangent thus goes through two spring force vectors.

Preferably, therefore, the spring elements 22 dimensioned such that when exceeding a threshold value of torque, the brake shoes 31 completely off the axis 5 take off, so lose contact and thus cause no friction.

LIST OF REFERENCE NUMBERS

1

driven shaft

2

bolt

3

first toothing part

4

second toothing part

5

Axis, in particular fixed

20

receiving part

21

first spring element

22

second spring element

30

recess

31

Brake shoe, in particular cup-shaped

Claims (10)

Brake assembly having an axis (5), a housing part, a first shaft (1) and a driven part, wherein the first shaft (1) is rotatably mounted relative to the housing part, wherein the axis (5) is fixedly connected to the housing part, wherein an end portion of the shaft (1) bolts (2) are arranged, wherein the respective pin (2) in a respective recess (30) of a receiving part (20) at least partially protruding, wherein a first spring element (21) between the receiving part (20) and the driven part is arranged, characterized in that a second spring element (22) is supported on the receiving part (20) and a brake shoe (31) in the direction of the axis (5) pushes back. Brake arrangement after Claim 1 , characterized in that the bolts (2) are arranged eccentrically on the shaft (1) and / or the bolts (2) are arranged at a non-vanishing radial distance, and / or wherein the bolts (2) are spaced apart in the circumferential direction. Brake arrangement according to at least one of the preceding claims, characterized in that the recess (30) is surrounded by the material of the receiving part (20) in each case. Brake assembly according to at least one of the preceding claims, characterized in that the driven part is a shaft or a first toothing part (3) which is in engagement with a second toothing part (4). Brake assembly according to at least one of the preceding claims, characterized in that the recess (30) has an edge region which has a decreasing radial distance with increasing circumferential angle, and / or the recess (30) has an edge region which has a decreasing radial distance with decreasing circumferential angle , Brake arrangement according to at least one of the preceding claims, characterized in that the torque introduced by the pin (2) into the receiving part (20) is transmitted to the output part via the first spring element (21). Brake arrangement according to at least one of the preceding claims, characterized in that the spring force of the first spring element (21) is directed in a tangential direction. Brake assembly according to at least one of the preceding claims, characterized in that the respective recess (30) provides the respective bolt (2) a game in the circumferential direction. Brake assembly according to at least one of the preceding claims, characterized in that the receiving part (20) is movable in a single radial direction. Brake arrangement according to at least one of the preceding claims, characterized in that at least one further brake shoe (31) at the same radial distance as the first brake shoe (31) is arranged, wherein the brake shoes are circumferentially regularly spaced from each other, wherein the further or further brake shoes (31 ) is held by a second spring elements (22) on a further receiving part (20) or on further receiving parts or are, wherein the receiving parts in the circumferential direction regularly spaced from each other and are each arranged at the same radial distance, wherein the respective first spring elements (21) a connect respective receiving part with the output part.

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