DE102016122936B4 - Barrel for a watch - Google Patents

Abstract

A barrel for a clock, with a rotatably mounted first barrel drum (1) coaxially with a radial distance surrounds a rotatably mounted first spring core (9), which is surrounded by a spiral-like first tension spring (10) with its inner end to the first Spring core (9) and with its outer end with the first barrel drum (1) is connected to the first barrel drum (1) a sprocket exhibiting elevator wheel (3) is rotatably connected to the first spring core (9) coaxially a second Barrel drum (7) is rotatably connected coaxially with a radial distance a rotatably mounted second spring core (11) encloses, which is surrounded by a spiral-like second tension spring (12) with its inner end to the second spring core (11) and with their outer end to the second barrel drum (7) is connected, wherein with the second spring core (9) coaxially a wheel (17) of a gear train of the clock is rotatably connected, dadu characterized in that the first spring core (9) is sleeve-shaped and is rotatably mounted on a coaxial bearing extension (13) of the second spring core (11).

Description

The invention relates to a barrel for a clock, with a rotatably mounted first barrel drum coaxially with a radial distance surrounds a rotatably mounted first spring core, which is surrounded by a spiral-like first spring, with its inner end to the first spring core and with its outer end is connected to the first barrel drum, wherein the first barrel drum a ring gear exhibiting elevator wheel is rotatably connected to the first spring coaxially coaxially a second barrel drum is rotatably connected coaxially with a radial distance surrounds a rotatably mounted second spring core, the is surrounded by a spiral-like second tension spring, which is connected at its inner end to the second spring core and at its outer end to the second barrel drum, wherein coaxially with the second spring core a wheel of a gear train of the clock is rotatably connected.

From the US 2012/0120775 A1 Such a barrel is known in which the two barrel drums in operation move out of a coaxial and can skew each other.

From the FR 1 195 976 A as well as the GB 318 171 A Spiral spring devices are known with a plurality of coil springs, which are each arranged in an associated drum. The drums with the coil springs are arranged side by side freely rotatably on a common axis, wherein the radially outer end of a coil spring is attached to its associated drum and the inner end of this coil spring to the adjacent drum.

The object of the invention is to provide a barrel for a clock of the type mentioned, which has a large power reserve with a small space requirement and at least largely avoids skewing the barrel drums.

This object is achieved in that the first spring core is formed like a sleeve and is rotatably mounted on a coaxial bearing extension of the second spring core.

With this design, both spring drums are stored securely guided and thus skewing the barrel drums at least largely avoided with a small space requirement.

In addition, this also leads to a small size of the barrel.

Although the two tension springs are arranged parallel to each other, but connected in series. This leads to a high power reserve at a largely same moment.

Compared to a single spring, a better height-to-thickness ratio of the tension springs is possible, whereby the tension springs are easier to produce at such a high torque. In addition, the life compared to a single spring is much higher.

For a stable training with smaller wall thicknesses, it leads when the first barrel drum and / or the second barrel barrel are pot-shaped with a first and / or second bottom.

In a simple embodiment of the bearing extension can protrude with its free end of the sleeve-like first spring and be rotatably mounted with this free end in a radial bearing.

For easy coaxial positioning of the sleeve-like spring first be axially supported on the radial bearing.

For radial positioning of the first barrel drum, the first barrel drum may have a concentric bearing lug, which is rotatably mounted in a corresponding bearing bore of a fixed bridge wheels.

For proper axial positioning of the first and second barrel drum to each other, the second spring core having a larger cross-section than the bearing extension, wherein the bottom of the second barrel drum is axially supported at the radial transition from the second spring core of larger cross-section to the bearing extension.

Is the first bottom of the first barrel barrel formed step-like on its side facing the elevator wheel and is formed between the radially outer stage and the elevator wheel radially outwardly open and radially encircling guide the same width as the thickness of the bridge wheels, in which the bridge wheels with a bridge wheels is used, the first barrel barrel is guided in a simple manner on the fixed bridge wheels both axially and radially.

• 1 eine Draufsicht eines Federhauses einer Uhr
• 2 einen Schnitt des Federhauses nach 1 entlang der Linie X-X

An embodiment of the invention is illustrated in the drawing and will be described in more detail below. Show it

• 1 a top view of a barrel of a clock
• 2 a section of the barrel after 1 along the line XX

The illustrated barrel for a clock has a first barrel drum 1 on, on their upper side a first floor 2 having.

The first floor 2 is at its the drum interior of the first barrel drum 1 stepped side formed step-like, wherein the first floor 2 on its inner side closer to the drum has a larger diameter and a smaller thickness than on its side remote from the drum interior with a smaller diameter and a larger thickness.

On the drum interior of the first barrel drum 1 further side of the first floor 2 there is an elevator wheel 3 approximately the same outer diameter as the first floor 2 on and is arranged by means of several circumferentially distributed screws 22 with the elevator wheel 3 firmly connected.

In the area of lesser thickness of the first floor 2 and the elevator wheel 3 is an annular guide groove 4 educated.

A fixed wheel bridge 18 The watch has a wheel bridge hole 19 with a diameter equal to the diameter at the bottom 20 the guide groove 4 in the radially inner region corresponds to the greater thickness of a bearing approach 23 forms.

Before screwing together first ground 2 the first barrel drum 1 with the elevator wheel 3 is the first floor 2 with his bearing approach 23 into the wheel bridge hole 19 and then the elevator wheel 3 by means of screws 21 on the first floor 2 screwed. Here comes the first floor 2 in contact with the wheel bridge 18 so that the first barrel drum 1 is protected against an obliquity.

The elevator wheel 3 has a center hole 5 in which an annular collar 6 of the first soil 2 protrudes.

Parallel to the first barrel drum 1 is a second barrel drum 7 arranged on her the first barrel drum 1 facing side a second floor 8th having.

The second floor 8th Coaxially has a sleeve-like Fortsatu 22 on the inside of the drum of the first barrel drum 1 sticks out and on the first innerspring 9 is screwed on.

In the drum interior of the first barrel drum 1 is a first spiral-like first tension spring 10 arranged the first innerspring 9 encloses and with its outer end with the first barrel drum 1 and with its inner end with the first innerspring 9 connected is.

In the drum interior of the second barrel drum 7 is coaxially a second spring core 11 arranged by a spiral-like second tension spring 12 is enclosed with its outer end with the second barrel drum 7 and with its inner end with the second innerspring 11 connected is.

The second spring core 11 has a bearing extension 13 smaller diameter, on which the sleeve-like extension 22 the second barrel drum 7 is rotatably mounted.

The bearing extension protrudes with its free end 13 from the sleeve-like extension 22 out and is in a bearing block of a radial bearing 14 rotatably mounted. The bearing stone is to in the sleeve bore 15 of the collar 6 the first barrel drum 1 firmly arranged.

Axial is the sleeve-like extension 22 supported with its front on the bearing stone.

The second floor 8th the second barrel drum 7 is axial on the radial transition 16 from the second innerspring 11 to the bearing extension 13 supported.

In the elevator wheel 3 remote end portion of the second spring core 11 is coaxially a wheel 17 a gear train of the clock rotatably arranged.

The elevator wheel 3 can be rotated by means of a winding crown of the clock and so the two springs 10 and 12 be tense.

LIST OF REFERENCE NUMBERS

1

first barrel drum

2

first floor

3

elevator wheel

4

guide

5

drilling

6

collar

7

second barrel drum

8th

second floor

9

first innerspring

10

first tension spring

11

second spring core

12

second tension spring

13

Bearing extension

14

radial bearings

15

sleeve bore

16

radial transition

17

wheel

18

wheel bridge

19

Wheel bridge bore

20

ground

21

screw

22

sleeve-like extension

23

bearing projection

Claims (7)

A barrel for a clock, with a rotatably mounted first barrel drum (1) coaxially with a radial distance surrounds a rotatably mounted first spring core (9), which is surrounded by a spiral-like first tension spring (10) with its inner end to the first Spring core (9) and with its outer end with the first barrel drum (1) is connected to the first barrel drum (1) a sprocket exhibiting elevator wheel (3) is rotatably connected to the first spring core (9) coaxially a second Barrel drum (7) is rotatably connected coaxially with a radial distance a rotatably mounted second spring core (11) encloses, which is surrounded by a spiral-like second tension spring (12) with its inner end to the second spring core (11) and with their outer end to the second barrel drum (7) is connected, wherein with the second spring core (9) coaxially a wheel (17) of a gear train of the clock is rotatably connected, dadu characterized in that the first spring core (9) is sleeve-shaped and is rotatably mounted on a coaxial bearing extension (13) of the second spring core (11). Barrel after Claim 1 , characterized in that the first barrel drum (1) and / or the second barrel drum (7) pot-shaped with a first and / or second bottom (2, 8) is formed. Spring barrel according to one of the preceding claims, characterized in that the bearing extension (13) protrudes with its free end out of the sleeve-like first spring core (9) and is rotatably mounted with this free end in a radial bearing (14). Barrel after Claim 3 , characterized in that the sleeve-like first spring core (9) is axially supported on the radial bearing (14). Spring barrel according to one of the preceding claims, characterized in that the first barrel drum (1) has a concentric bearing projection (21) which is rotatably mounted in a corresponding bore (5) of a stationary wheel bridge (18). A barrel house according to any one of the preceding claims, characterized in that the second spring core (11) has a larger cross-section than the bearing extension (13), the second base (8) of the second barrel drum (7) at the radial transition (16) of the second spring core (11) of larger cross-section to the bearing extension (13) is axially supported. A barrel according to any one of the preceding claims, characterized in that the first bottom (2) of the first barrel drum (1) is step-like on its side facing the elevator wheel (3), and radially between the radially outer step and the winding wheel (3) outside open and radially encircling guide groove (4) of the same width as the thickness of the wheel bridge (18) forms, in which the wheel bridge (18) with a wheel bridge bore (19) is inserted.

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