MOTOR OPERATED SPOOL
A spool with a hub to carry a spooled hose or cable and first and second couplings to attach the spool to a cradle, wherein the first coupling is arranged to be fixed against rotation as the hub rotates and the second coupling is arranged to rotate in unison with the hub and wherein a drive unit is fitted between the first coupling and the hub to drive the hub around the first coupling and thereby wind the hose or cable around the hub.
The present invention generally relates to spools for winding cable, hose, rope or some other rope like object, and in particular to a spool operated by an electric motor.
RELATED APPLICATIONThis application claims the benefit of priority from Australian Patent No 2013242793, the contents of which are incorporated in entirety by reference.
BACKGROUNDSpools, or rewind reels, operated by an electric motor are preferred for winding and storage of hoses and cables. These spools save time and do not require physical effort to wind the cable for storage after use. Another advantage is that they can be adapted to operate via a remote control device to enable the winding of the cable from a position other than at the reel device.
Prior art electric spools are produced for this purpose but they are relatively large, heavy or bulky, taking up more space than traditional spools and therefore eliminating their ability to be used on small equipment such as 12 volt weed and pesticide sprayers. These spools also require the use of high current dedicated electrical wiring on vehicles as they are commonly used in mobile applications.
Currently known electric motor operated spools all employ a drum or cylinder for storing the coiled cable or hose and an electric motor separate from the spool. The motor rotates the spool through some form of gearing or reduction mechanism so that the hose becomes wrapped around the spool at a rate that is safe. Various methods are employed to transfer the rotating movement from the motor to the spool, all of which have their inherent drawbacks.
Some prior art drive methods include:
Belt and pulley system—this system poses a potential safety hazard if left uncovered and requires a belt tensioning or adjusting device. The belts will slip if they are not maintained causing failed operation;
Chain and sprocket system—if uncovered, this system poses the same problems as the belt and pulley system and it generates more noise;
Direct connected open gears—this system is similar to the chain and sprocket system, but is more difficult to cover for safety. The motor must also extend outside the spool width, thereby taking up more space;
Direct connected motor/gearbox unit to spindle that supports the spool—this system significantly adds to the overall width of the spool assembly; and
Direct gear drive to hub assembly that supports the spool on one side (see for example Australian Patent 2005231518)—this system requires heavy framework, hub bearings and a shaft to support the spool, resulting in a heavy finished product.
The reference in this specification to any prier publication for information derived from it), or to any matter which is known, is not, and should not be taken as, an acknowledgement or admission or any form of suggestion that prior publication (or information derived from it) or known matter forms part of the common general knowledge in the field of endeavour to which this specification relates.
BRIEF SUMMARYThe present invention seeks to provide a compact, economical, electric motor operated spool.
In accordance with the invention, there is provided a spool with a huh to carry a spooled hose or cable and first and second couplings to attach the spool to a cradle, wherein the first coupling is arranged to be fixed against rotation as the hub rotates and the second coupling is arranged to rotate in unison with the hub and wherein a drive unit is fitted between the first coupling and the hub to drive the hub around the first coupling and thereby wind the hose or cable around the hub.
Preferably, the drive unit is an electric motor at least partially recessed in the hub.
Preferably, the motor includes a stator component fixed relative to the first coupling and a rotor component keyed for rotation with the hub.
Preferably, an outer housing of the motor is fixed to the rotor component.
Preferably, the housing includes a flange element fixed to a first side of the spool, to loci the rotor and hub together for rotation in unison.
Preferably, the motor is substantially housed within the hub.
Preferably, the first coupling is in the form of a shaft with a first end projecting from the first side of the spool, for receipt in a first mount of the cradle.
Preferably, the second coupling includes a rotary coupler that has an inlet, an outlet, a gallery that provides fluid communication between the inlet and outlet, and a swivel that allows relative rotation between the inlet and the outlet, wherein the outlet provides a connection for a hose carried by the spool and the inlet provides a connection for a supply line to allow fluid to pass between the supply line and the hose.
Preferably, the gallery and outlet are formed in a body of the coupler that is mounted to a second side of the spool, for rotation in unison with the hub.
Preferably, the body supports a bearing for a second end of the shaft, that extends through the motor and toward the second side of the spool, the bearing allowing relative rotation between the second coupling and the shaft.
Preferably, the second coupling includes an extension piece that is supported in a bearing assembly used to mount the second coupling in a second mount of the cradle.
In another aspect, there is provided a spool assembly including a spool, as described above, and a cradle with first and second mounts arranged to support the first and second couplings of the spool.
Preferably, the spool assembly further includes a hose or cable wound onto the hub of the spool.
Preferably, the cradle includes a hose guide.
Preferably, the spool can be remotely operated.
Example embodiments should become apparent from the following description, which is given by way of example only, of at least one preferred but non-limiting embodiment, described in connection with the accompanying drawings, in which:
The following modes, given by way of example only, are described in order to provide a more precise understanding of the subject matter of a preferred embodiment or embodiments.
In the Figures, incorporated to illustrate features of an example embodiment, like reference numerals are used to identify like parts.
Throughout the specification the term cable is intended to include any type of cable or similar object including, but not limited to, various different types of cable, hose, rope, or any other rope-like object.
Referring to
The spool 1 is mounted on a cradle 5 that includes a first mount 6, a second mount 7 and a base plate 8. The two side mounts 6, 7 may be joined by welding or bolting or any other suitable arrangement to the base plate 8, forming the support mechanism to suspend the spool 1. The spool 1 and cradle 5 together form a spool assembly 9.
A motor 10 is arranged to it into a recess 11 formed in the side 2. The motor 10 includes a cylindrical outer housing 12 with a flange 13 for attaching the motor 10 to the side 2, via fasteners 14. The motor 10 also has a shaft 15 with a first end 16 for receipt in a bracket 17 of the first mount 6. The shaft 15 forms a first coupling 20 of the spool 1.
In a preferred embodiment the motor 10 is a brushless direct current (DC) electric motor. A brushless DC motor has many advantages over conventional brushed DC motors, including, but not limited to, longer life and higher reliability, higher efficiency, no radio frequency interference due to brush commutation, linear torque/current relationship, smooth acceleration or constant torque and low cost to manufacture.
The motor 10 operates by providing a torque that rotates the housing 12 and flange 13 relative to the shaft 15, to thereby rotate the hub 4. Since the spool 1 has the motor 10 mounted within it, the motor housing 12 becomes an integral part of the spool 1. When fixed to the spool 1 via the flange 13, the first end 16 of the shaft 15 projects from the side 2 of the spool 1, for receipt in the mount 6. As the motor 10 is an integral part of the spool 1, the shaft 15 becomes a load carrying element for one side of the rotating spool 1.
The shaft 15 is also designed to be fixed against rotation which means no bearing is needed between the mount 6 and the coupling 20, In a preferred embodiment a bolt 21 is used to secure the shaft first end 16 to the bracket 17 and to prevent it rotating.
Referring now to
Referring now to
The motor 10 is controlled by a brushless DC motor controller (not shown) to allow it to operate from a vehicle battery of either 12 or 24 volts, or any other suitable power source. The motor 10 may also be configured to be controlled remotely. Although a brushless DC motor is preferred, any other suitable motor or equivalent drive unit can instead be used. For example, a geared motor may be used instead of the brushless motor 10 described above.
In any case, it is apparent from
Referring now to
The supply line 35 may be used to provide water to the hose 31. Alternatively, the coupler 32 may be used to supply any other form of liquid or gas, as required.
Referring to
Referring to
The hose guide 41 enables the operation of the spool assembly 9 via a remote control device. A system to guide the hose 31 onto the spool 1 is required as the operator may be positioned away from the spool assembly 9.
In one embodiment, such as that shown in
In another embodiment, the hose guide 41 is as shown in
In some example embodiments, the spool assembly 9 provides the ability to recharge the battery during manual de-spooling of the hose 31. As the hose 31 is pulled out the rotation of the spool 1 is used to generate electricity, preferably using the motor 10, to charge the batteries that power the rewind. This is of particular benefit when using a standalone rechargeable battery without continual charging capabilities, such as when used with a combustion engine powered pump that is manually started and does not have its own battery, for example.
Preferably, the remote control will incorporate variable rewind speed selection. Also preferably, the spool assembly 9 will incorporate an audible and/or visual warning of the pending operation of the spool 1 for safety purposes.
Referring to
Referring still to
Many modifications will be apparent to those skilled in the art without departing from the scope of the present invention.
Claims
1. A spool with a hub to carry a spooled hose or cable and first and second couplings to attach the spool to a cradle, wherein the first coupling is arranged to be fixed against rotation as the hub rotates and the second coupling is arranged to rotate in unison with the hub and wherein a drive unit is fitted between the first coupling and the hub to drive the huh around the first coupling and thereby wind the hose or cable around the hub.
2. The spool of claim 1, wherein the drive unit is an electric motor at least partially recessed in the hub.
3. The spool of claim 1, wherein the motor includes a stator component fixed relative to the first coupling and a rotor component keyed for rotation with the hub.
4. The spool of claim 3, wherein an outer housing of the motor is fixed to rotate with the rotor component.
5. The spool of claim 4, wherein the housing includes a flange element fixed to a first side of the spool, to lock the rotor and hub together for rotation in unison.
6. The spool of claim 5, wherein the motor is substantially housed within the hub.
7. The spool of claim 5, wherein the first coupling is in the form of a shaft with a first end projecting from the first side of the spool, for receipt in a first mount of the cradle.
8. The spool of claim 7, wherein the second coupling includes a rotary coupler that has an inlet, an outlet, a gallery that provides fluid communication between the inlet and outlet, and a swivel that allows relative rotation between the inlet and the outlet, wherein the outlet provides a connection for a hose carried by the spool and the inlet provides a connection for a supply line to allow fluid to pass between the supply line and the hose.
9. The spool of claim 8, wherein the gallery and outlet are formed in a body of the coupler that is mounted to a second side of the spool, for rotation in unison with the hub.
10. The spool of claim 9, wherein the body supports a bearing for a second end of the shaft, that extends through the motor and toward the second side of the spool, the bearing allowing relative rotation between the second coupling and the shaft.
11. The spool of claim 10, wherein the second coupling includes an extension piece that is supported in a bearing assembly used to mount the second coupling in a second mount of the cradle.
12. A spool assembly, including the spool of any one of claims 1 to 11 and a cradle with first and second mounts arranged to support the first and second couplings of the spool.
13. The spool assembly of claim 12, further including a hose or cable wound onto the hub of the spool.
14. The spool assembly of claim 12, wherein the cradle includes a hose guide.
15. The spool assembly of claim 14, wherein the spool can be remotely operated.
Type: Application
Filed: Oct 9, 2014
Publication Date: Aug 25, 2016
Inventor: Daniel Firth (Singleton)
Application Number: 15/026,562