Toothed belt drive

Patent metadata

Field	Value
Publication number	US-10837517-B2
Application number	US-201816109345-A
Country	US
Kind code	B2
Filing date	Aug 22, 2018
Priority date	Feb 22, 2016
Publication date	Nov 17, 2020
Grant date	Nov 17, 2020

Abstract

Toothed belt drive having one toothed belt and at least two, preferably helically geared, toothed pulleys, wherein the toothed belt wraps the toothed pulleys over a part-region of the circumference of the latter and the teeth of the toothed belt mesh in the tooth gaps of the toothed pulleys, wherein the air gap ES or ES(mk) that relates to the nominal pitch P and results from the difference between the width es of the tooth gaps of the respective toothed pulley and the width eR of the teeth of the toothed belt is configured at the mean height of the teeth, depending on the tooth count zR of the toothed pulleys and on the tooth count z of the toothed pulleys, or on the tooth counts zk of the smaller toothed pulley and on zg of the larger toothed pulley, respectively.

First claim

What is claimed is:

1. A toothed belt drive comprising:
a toothed belt having a plurality of teeth and at least one drive side provided with a first toothed profile;
at least two toothed pulleys each having a circumference and defining tooth gaps;
said toothed pulleys each having a second toothed profile that is complementary to said first toothed profile;
said toothed belt being configured to wrap said at least two toothed pulleys over a part-region of the circumference of each of said at least two toothed pulleys;
said teeth of said toothed belt being configured to mesh in said tooth gaps of said at least two toothed pulleys;
wherein an air gap (E S ) that relates to a nominal pitch (P) and results from a difference between a width (e S ) of the tooth gaps of the respective one of said at least two toothed pulleys and a width (e R ) of said teeth of said toothed belt at a mean height of said teeth, depending on a tooth count (z R ) of said toothed belt and on a tooth count (z) of said respective one of said at least two toothed pulleys, is configured such that

E
S

=

e
S

-

e
R

=

[

C
S

+

0.004
·
z

z
R

-
z

]

·
P

wherein (C S ) is predefined as a constant for a standard backlash in the case of toothed belt drives in a range of
0.06≤C S ≤0.08.

2. The toothed belt drive of claim 1 , wherein one of said at least two toothed pulleys has a pitch circle diameter of (d)≤45 mm.

3. The toothed belt drive of claim 1 , wherein one of said at least two toothed pulleys has a tooth count between 20 and 60.

4. The toothed belt drive of claim 1 , wherein said at least two toothed pulleys are helically geared.

5. A toothed belt drive comprising:
a toothed belt having a plurality of teeth and at least one drive side provided with a first toothed profile;
at least two toothed pulleys each having a circumference and defining tooth gaps;
said at least two toothed pulleys each having a second toothed profile that is complementary to said first toothed profile;
said toothed belt being configured to wrap said at least two toothed pulleys over a part-region of the circumference of each of said at least two toothed pulleys;
said teeth of said toothed belt being configured to mesh in said tooth gaps of said at least two toothed pulleys;
wherein said at least two toothed pulleys have dissimilar diameters and include a smaller toothed pulley and a larger toothed pulley; and, at said smaller toothed pulley an air gap (E S(mk) ) that relates to a nominal pitch (P) and results from a difference between a width (e Smk ) of said tooth gaps of said smaller toothed pulley and a width (e R ) of said teeth of said toothed belt at a mean height of said teeth, depending on a tooth count (z R ) of said toothed belt and on a tooth count (z k ) of said smaller toothed pulley and on (z g ) of said larger toothed pulley, is configured such that:

E

S
⁡

(
mk
)

=

e
Smk

-

e
R

=

[

C
S

+

0.004
·
z

z
R

-

z
k

+

(

z
g

z
k

-
1

)

·

C
mk

·
2

⁢

⁢

π
·
u

Assignees

• Contitech Antriebssysteme Gmbh

Inventors

• Sattler Heiko

Classifications

• F16G1/28 Primary

  with a contact surface of special shape, e.g. toothed · CPC title

• F16H7/16

  without adjusting the driving or driven shaft · CPC title

• F16H7/023

  with belts having a toothed contact surface or regularly spaced bosses or hollows for slipless or nearly slipless meshing with complementary profiled contact surface of a pulley · CPC title

• F16H55/171

  Toothed belt pulleys · CPC title