DE202005002842U1 - Chain adjusting device for cross country motorcycle, comprising two spreading arms and two pressure rolls - Google Patents

Abstract

The device (1) is equipped with an upper pressure roll (11) and an upper arm (12) with the pressure roll (11) attached to its front end and the shock absorbing unit at its rear. A second, identical lower arm (22) is also connected to the shock absorbing unit assembled of an axle (34) and a disk (35) attached to the lower arm (22). A strong pressure spring (15), wound around the axle (34), acts on the arms (12, 22) adjusting the tension of the chain (5, 6).

Description

Technique of invention

The The present invention relates to a construction of an off-road motor chain tensioner whose Absorption device the sudden Bumps on the Chain tensioner dampened, which increases the durability of the construction of the off-road motor chain tensioner elevated.

State of technology

One dirt bike is usually for the rides on field such as beach, riverbed, mud etc. thought and needed therefore a special equipment for good stability and a usable To allow life.

1 shows the conventional construction of the chain tensioner of an off-road motorcycle: The usual on the market off-road motorcycles are mostly intended for forward and reverse.

When reversing, the upper part of the chain moves 55 given the rotation of the front sprocket 51 and then the rear sprocket 52 in the direction of movement Y ', therefore arises on the upper part of the chain 66 Tension. Also, the bottom part of the chain 66 from the device of the first pressure roller 50 supported upwards and thereby more tensioned while the upper part of the chain 55 whereas it is in loose condition.

The disadvantage of the situation described above is easy to see that the upper part of the chain 55 in the movement of the direction Y 'fails from the drive gears and hinders the reverse drive.

In addition, the durability of the chain through the connection between the pressure spring 133 and the rear suspension 144 be reduced because the pinch roller 111 immediately contacted the chain and exerts pressure.

In addition, the durability of the pressure spring 133 can be reduced, since the angles of rotation are too large in the conventional construction of the chain tensioner.

2 and 3 show another example of the conventional design of the chain tensioner in view and profile.4: To solve the problem of loose chain in forward and reverse, is next to the upper part of the chain 55 ' the device of the third pressure roller 50 " appropriate.

When driving forwards, the front sprocket turns 51 ' in the direction of X 'and at the same time brings the upper part of the chain 55 ' in motion and offset the rear sprocket 52 ' in a rotational movement, therefore creates tension on the upper part of the chain 55 '; based on the support of the device of the third pinch roller 50 " can the angle of rotation of the pressure spring 133 become huge. The lower part of the chain 66 ' is in contrast in a loose situation, but with the support of the device of the second pinch roller 50 ' not too loose, but as a disadvantage in the 1 illustrated upper part of the chain 55 proved.

When reversing, it leads to the opposite: The device of the third pinch roller 50 " directly supports the upper part of the chain 55 ' while the device of the second pinch roller 50 ' the tension from the top of the chain 66 ' receives, the angle of rotation of the pressure spring 133 is in the greatest angle.

3 shows the top view of the device of the third pressure roller 50 " : This device of the pressure roller consists of the pressure roller 111 , the pressure arm 122 , the pressure spring 133 and the rear suspension 144 , As the upper part of the chain 55 ' up on the pinch roller 111 anfstürtzt and in the direction of X 'moves, the pressure roller 111 and the pressure arm 122 tensioned upwards by a force, which force finally comes from the pressure spring 133 is absorbed.

One end of the pressure spring 133 is on the pressure arm 122 and the other on the rear suspension 144 attached, therefore, the pressure spring can 133 broken and the chain will be damaged if the above-described, upward-turning force is too strong. Likewise, similar problems arise in the device of the second pinch roller 50 ' caused.

by virtue of the disadvantages explained above becomes a construction of the off-road motor chain tensioner proposed.

Advantages of the invention

• – der oberen Andruckrolle;
• – dem oberen Andruckarm, an dessen einem Ende mit der vorhergehend erwähnten oberen Andruckrolle, an dessen anderen Ende mit der Absorptionsvorrichtung verbunden ist;
• – dem unteren Andruckarm, an dessen einem Ende über die Absorptionsvorrichtung mit dem oben genannten oberen Andruckarm verbunden ist;
• – der unteren Andruckrolle, welche sich an dem anderen Ende des oben genannten unteren Andruckarm befindet.

The invention is therefore based on the object to remedy the deficiencies of the prior art. The construction according to the invention of the off-road motor chain tensioner consists of the following components:

• - the upper pressure roller;
• - The upper Andruckarm, is connected at one end to the aforementioned upper pressure roller, at the other end to the absorption device;
• - The lower Andruckarm, at one end via the absorption device with the connected to above upper Andruckarm;
• - The lower pinch roller, which is located at the other end of the above lower Andruckarm.

So intended a construction of the off-road motor chain tensioner be proposed, which in particular the durability of the chain tensioner according to the invention by means of a built-in absorption device for damping sudden Shocks increased.

These Task is through this one construction of the off-road motor chain tensioner solved, which the characteristics of the independent Patent claim 1.

Further alternative or advantageous embodiments or further developments of the invention are in the characteristics of dependent claims described.

list of drawings

1 is a schematic representation of the conventional construction of the chain tensioner

2 is a schematic representation of the other conventional construction of the chain tensioner

3 is a schematic representation of the top view of the chain tensioner of 2

4 is a schematic representation of an embodiment of the construction according to the invention of the off-road motorcycle chain tensioner

5 is a schematic representation of the top view of an embodiment of the construction according to the invention of the off-road motorcycle chain tensioner

6 is a schematic representation of the application of an embodiment of the construction according to the invention of the off-road motorcycle chain tensioner

embodiments the invention

below The invention is purely exemplary with reference to the figures of the drawing described in more detail. Same parts in different embodiments, which are the same Perform functions, are provided below with the same designations and reference numerals.

• – der mit dem oberen Andruckarm 12 verbundenen Andruckrolle 11;
• – dem obere Andruckarm 12, welcher sich an seinem anderen Ende mit der Andruckrolle 11 und der Achse 34 verbunden ist;
• – der Achse 34, die über die stoßverdämpfende Andruckfeder 15 mit dem Achsabschluss 35 verbunden ist;
• – einem Achsabschluss 35, welcher an einem Ende des unteren Andruckarmes 22 angebracht ist und somit eine Stahl-Konstruktion mit dem unteren Andruckarm 22 geschaffen wird;
• – einem unteren Andruckarm 22, welcher sich an seinem einen Ende mit der unteren Andruckrolle 21 verbindet.

4 . 5 . 6 show the schematic representation of a better embodiment, the plan view of this better embodiment and the application of the embodiment of the construction according to the invention of the off-road motor chain tensioner, this construction according to the invention of the off-road motor chain tensioner 1 in particular consists of the following components:

• - the one with the upper pressure arm 12 connected pinch roller 11 ;
• - the upper pressure arm 12 , which at its other end with the pinch roller 11 and the axis 34 connected is;
• - the axis 34 that over the shock-absorbing pressure spring 15 with the Achsabschluss 35 connected is;
• - Axis termination 35 , which at one end of the lower Andruckarmes 22 is attached and thus a steel construction with the lower Andruckarm 22 is created;
• - a lower pressure arm 22 , which at its one end with the lower pressure roller 21 combines.

Due to the fact that the pressure spring according to the invention 15 has a good elasticity against strong clamping force, arises between the upper Andruckarm 12 and the lower pressure arm 22 a fixed angle when the smallest torque of the pressure spring 15 is not reached.

When driving forwards, the front sprocket turns 51 in the direction of X, as in 6 shown, while bringing the upper part of the chain 5 in motion and offset the rear sprocket 52 rolling, therefore creates tension on the upper part of the chain 5 ; on the basis of the above-mentioned tension becomes the upper pinch roller 11 pushed upward to position A, whereas the lower part of the chain is located 6 in a relaxed situation. Due to the fact that the upper pressure arm 12 and the lower pressure arm 22 together form certain angles and influence one another with respect to the movements, moves the lower Andruckarm 22 together with the upper pressure arm 12 upward, then the contact position C arises on the upper part of the chain 6 ,

When driving in reverse, the front sprocket rotates in the direction of Y, as in 6 and at the same time displaces the lower part of the chain 6 in tension and sets the rear sprocket 52 so moving, the lower pinch roller 21 is then pushed down from position A, and the upper Andruckarm 12 and the lower pinch roller 11 move in position B.

In the second embodiment of the invention, the wear of the anti-rust chain of the off-road motorcycle by the pressure of the Andruckarme 12 and 22 diminished and so their hold increased availability.

It is easy to understand that the upper part of the chain 6 without the support of the pressure arms 12 and 22 slightly affected by gravity and acceleration of the drive.

In addition, the pressure spring does not come to their critical angle, which can lead to a longer durability of the pressure spring, since the upper Andruckarm 12 and the lower pressure arm 22 In this construction according to the invention of the off-road motor chain tensioner a fixed angle is formed and the pressure spring 15 also located in its smallest torque.

Of the previously described explanation According to this construction according to the invention of the off-road motor chain tensioner Advantages over the durability of the drive chain and the pressure spring in conventional techniques. Thus, the change of components of the chain tensioner is minimized and the maintenance costs of a chain tensioner are reduced.

The present invention provides a construction of the off-road motor chain tensioner, which in particular the durability of the chain tensioner according to the invention increased by means of a built-in absorption device for damping sudden shocks.

• – der oberen Andruckrolle;
• – dem oberen Andruckarm, der an seinem einen Ende mit der vorhergehend erwähnten oberen Andruckrolle, an dessen anderem Ende mit der Absorptionsvorrichtung verbunden ist;
• – dem unteren Andruckarm, an dessen einem Ende über die Absorptionsvorrichtung mit dem oben genannten oberen Andruckarm verbunden ist;
• – der unteren Andruckrolle, welche sich an dem anderen Ende des oben genannten unteren Andruckarm befindet.

A construction according to the invention of the off-road motor chain tensioner consists of:

• - the upper pressure roller;
• - The upper Andruckarm, which is connected at one end to the aforementioned upper pressure roller, at the other end to the absorption device;
• - The lower Andruckarm, is connected at one end via the absorption device with the above-mentioned upper Andruckarm;
• - The lower pinch roller, which is located at the other end of the above lower Andruckarm.

55

of the upper part of the chain

52

of the rear sprocket

50

the Device of the first pressure roller

111

the pinch

55 '

of the upper part of the chain

66 '

of the lower part of the chain

52 '

of the rear sprocket

122

of the pressure arm

11

the upper pressure roller

34

the axis

15

the pressure spring

21

the lower pressure roller

52

of the rear sprocket

6

of the upper part of the chain

B

the Position B

X

the movement direction

X '

the movement direction

51

of the front sprocket

66

of the upper part of the chain

133

the pressure spring

144

the rear suspension

50 '

the Device of the second pressure roller

51 '

of the front sprocket

50 "

the Device of the third pressure roller

1

of the chain tensioner

12

of the upper pressure arm

35

of the Achsabschluss

22

of the lower pressure arm

51

of the front sprocket

5

of the upper part of the chain

A

the Position A

C

the pressing position

Y

the movement direction

Y '

the movement direction

Claims (2)

Off-road motorcycle chain tensioner With: - one upper pressure roller; - one upper Andruckarm, at one end of the aforementioned upper Pressure roller and attached to the other end of the absorption device is; - one lower Andruckarm, whose one end over the absorption device is connected to the above-mentioned upper Andruckarm; one lower pinch roller, which is at the other end of the above lower pressure arm is located. Off-road motorcycle chain tensioner according to claim 1, characterized in that the absorption device comprising the following components: - An axle lock, attached on the upper pressure arm; - an axle, mounted on the lower pressure arm; - one Pressure spring, mounted on the construction, which from the previous described axis and the axis termination is the voltage between the upper Andruckarm and the lower Andruckarm through to absorb a suitable angle.