JPH031644Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention uses a belt that is wound between the driving pulley attached to the output shaft of the prime mover and the driven pulley attached to the driven shaft to move the tension pulley. The present invention relates to a power intermittent operation mechanism for a belt transmission device that tensions and loosens the belt to intermittent power transmission.

(Prior Art) The belt transmission device described above is used in various mechanical devices. This belt transmission device includes a main clutch operating tool that presses a tension pulley against a belt wrapped around a driving pulley and a driven pulley via a tension spring to create a power transmission state, and a main clutch operating tool that pulls the tension pulley. A sub-clutch operating tool is provided that separates the clutch from the belt against the tension of the spring to interrupt power transmission, and while the main clutch operating tool is in a power transmission state, the sub-clutch operating tool is operated to appropriately transmit power. There is something that can be cut off.

For example, in an agricultural transport vehicle, the main clutch operating tool is operated to engage the clutch so that the power drives the traveling gear, and the sub-clutch operating tool is operated to disengage the clutch and transfer the power to the traveling gear. Power transmission to the speed change gearbox is cut off to perform speed change operations as appropriate.

(Problem to be solved by the invention) The sub-clutch operating tool uses the tensile force of the tension spring to cause the tension pulley, which is in a state of pressing the belt via the tension spring by engaging the main clutch operating tool, to apply the tension force of the tension spring. Since the sub-clutch operating tool is pulled away from the belt to cut off power transmission, operating the sub-clutch operating tool requires a much stronger operating force than the force used to operate the main clutch operating tool, making it difficult to operate.

(Means for Solving the Problems) Therefore, the present invention is configured as follows. That is, the driving frame 2 to which the prime mover 1 is attached is supported on the main body frame 4 via the anti-vibration rubber 3,
A belt 9 is wound between the driving pulley 6 fixed to the output shaft 5 of the prime mover 1 and the driven pulley 8 fixed to the driven shaft 7 on the main body frame 4 side, and the belt 9 is wound by the movement of the tension pulley 10. In a belt transmission device that cuts and cuts power transmission by tensioning and relaxing,
A main clutch operating tool 11 that tensions the belt 9 and transmits power by applying a tensile force to the tension pulley 10 between the driving frame 2 and the tension pulley 10; A sub-clutch operating tool 12 is provided between the tension pulley 10 and the driven pulley 8 to apply a tensile force to the driven pulley 8 side to separate the tension pulley 10 from the belt 9 while relaxing the belt 9 under tension.

(Function of the invention) If the main clutch operation tool 11 is operated to apply a tensile force between the driving frame 2 and the tension pulley 10, and the tension pulley 10 is pressed against the belt 9, the power transmission state is established. The tension of the belt acts between the output shaft 5 and the driven shaft 7 of the prime mover 1, causing the vibration isolating rubber 3 to bend to some extent, but when the sub-clutch operation tool 12 is operated in this state, the output shaft 5, that is, the prime mover 1 A tensile force acts between the belt and the main body frame 4, and the vibration isolating rubber 3 is further bent so that the driving pulley 6 is drawn toward the driven pulley 8, and the tension pulley 10 is separated from the belt 9 by the tensile force. Since the belt 9 is relaxed, there is no need to increase the operating force applied to the sub-clutch operating tool 12, and the amount of operation movement of the sub-clutch operating tool 12 can also be reduced.

(Effect of the invention) As described above, when the clutch is disengaged, the operating force applied to the sub-clutch operating tool 12 uses the deflection of the vibration isolating rubber 3 to pull the driving pulley 6 toward the driven pulley 8, so that the tension pulley 10 Since the pressing force on the belt 9 is relaxed, the amount of movement and operating force of the sub-clutch operating tool 12 can be made smaller than in the past, and the operation can be performed easily.

(Example) Next, an example of the present invention will be described with reference to the drawings.

The driving frame 2 is supported on the main body frame 4 via vibration isolating rubber 3, and the prime mover 1 is mounted on this driving frame 2 with bolts 13 and nuts 14 to prevent the vibrations of the motor 1 from being transmitted to the main body frame 4. ing.

A tension pulley 1 is attached to the output shaft 5 of the prime mover 1.
0 is rotatably supported on a rocking member 15,
A driving pulley 6 is fixed to the shaft end side.

A driven pulley 8 is attached to the driven shaft 7 of the transmission gearbox 17 attached to the main body frame 4 side with bolts 16.
is firmly attached.

Between the driving pulley 6 and the driven pulley 8,
A belt 9 is wound around the clutch, and the clutch is engaged and disengaged by pressing the tension pulley 10 into contact or separating it, thereby interrupting power transmission.

A main clutch operation tool 11 pivotally connected to a support shaft 18 on the main body frame 4 side, and the tension pulley 1
The swinging member 15 of No. 0 is connected with a release wire 19 and a spring 20. This release wire 19 is composed of an outer casing 22 interposed between a fitting 21 on the main body frame 4 side and the driving frame 2, and an inner wire 23 that connects the spring 20 and the main clutch operating tool 11.
The operating force applied to the main clutch operating tool 11 acts as a tensile force between the swinging member 15 which pivotally supports the tension pulley 10 and the driving frame 2. The main clutch operation tool 11 has a guide groove 2.
The tension pulley 10 is held in a state in which it is in pressure contact with the belt 9, that is, in a state in which the clutch is engaged.

Also, a sub-clutch operation tool 12 pivotally connected to a support shaft 26 on the main body frame 4 side, and a tension pulley 1
A release wire 27 connects a portion of the swinging member 15 that supports the main clutch operating tool 11 to a different arm portion. This release wire 27 is connected to an outer casing 29 interposed between two fittings 28, 28 provided on the main body frame 4 side, and a sub-clutch operation tool 12.
and an inner wire 30 connecting the arm portion of the swinging member 15, and the operating force applied to the sub-clutch operating tool 12 is transmitted through the inner wire 30.
The tensioning direction of the inner wire 30 is set so that the tensile force of 0 acts to separate the tension pulley 10 from the belt 9, and also acts to bend the vibration isolating rubber 3 and draw the driving pulley 6 toward the driven pulley 8. It is approximately parallel to the direction A connecting the output shaft 5 and the driven shaft 7.

Note that it is best to make the direction in which the release wire 30 of the sub-clutch operating tool 12 is stretched completely parallel to the direction A connecting the output shaft 5 and the driven shaft 7 in order to effectively deflect the vibration isolating rubber 3. , if the direction is different by up to about 45 degrees, the operating force of the sub-clutch operating tool 12 can be made smaller than before.

[Brief explanation of the drawing]

The figure is a schematic diagram showing an embodiment of the present invention, and FIGS. 1 and 2 are diagrams showing different operating states. 1... Prime mover, 2... Driving frame, 3... Anti-vibration rubber, 4... Body frame, 5... Output shaft, 6
...driving pulley, 7...driven shaft, 8...driven pulley, 9...belt, 10...tension pulley,
11...Main clutch operating tool, 12...Sub clutch operating tool.

Claims (1)

[Scope of utility model registration request] A driving frame 2 to which the prime mover 1 is attached is supported on the main body frame 4 via vibration isolating rubber 3, and a driving pulley 6 is fixed to the output shaft 5 of the prime mover 1 and a driven pulley 8 is fixed to the driven shaft 7 on the main body frame 4 side. In a belt transmission device, a belt 9 is wound between the drive frame 2 and the tension pulley 10, and the belt 9 is tensioned/relaxed by the movement of the tension pulley 10 to interrupt or interrupt power transmission. By applying a tensile force to the tension pulley 10, the belt 9
A main clutch operating tool 11 that transmits power by tensioning the main clutch, a main clutch operating tool 11, a main clutch operating tool 11, and a main clutch operating tool 11 that transmits power by tensioning the
0 and the tension pulley 10 and the driven pulley 8
A power intermittent operating mechanism for a belt transmission device is provided with a sub-clutch operating tool 12 which relaxes the belt 9 in tension while separating it from the belt 9 by applying a pulling force to the side.