DE20101828U1 - Starting device - Google Patents

Description

Designation: Starter device
Description

The invention relates to a device for starting devices with pull-cord starters.

Motor-driven equipment is often used in agriculture and forestry. These can be lawnmowers, chainsaws, tillers, brush cutters, universal devices, etc.

If there is an electrical socket nearby, these devices can be equipped with an electric motor. However, if the device is to be used in open areas or if more power is required than standard electric motors (or their batteries) can provide, these devices are equipped with petrol or diesel engines. Starting the device is often problematic. The devices usually have a pull starter. The user has to start the device with a strong pull on a pull cord. With the other hand, he has to hold the device or apply a counterforce to the device and at the same time operate a mixture-forming lever or a decompression valve.

Starting these small engines is sometimes a strenuous task, as they do not always start on the first pull. Especially in repair shops where defective devices have been handed in, it can happen that a mechanic has to make many attempts to start a defective device until it is completely repaired.

If he has to repair several devices one after the other, this can be an unreasonable burden.

The object of the invention is therefore to propose a device with which devices with pull-cord starters can be started without requiring any effort from the user.

This object is achieved according to the invention by a device having the features of claim 1. Embodiments of the invention are the subject matter of subclaims.

According to the invention, a starter motor is provided which operates the pull starter via a further pull rope. According to the invention, the user only has to bring the starter device together with the device to be started, connect the second pull rope to the pull starter and then start the device, which operates the pull starter by motor. The otherwise strenuous starting process is thus reduced to the flip of a button or a lever. Since the work is not strenuous, the starting process can be repeated as often as desired, in particular until the combustion engine is running smoothly. Such a device is not only suitable for users of portable devices with a petrol engine, but especially for repair workshops where the problem of starting defective or reassembled engines occurs particularly frequently.

In a first embodiment, a device for supporting between the traction motor and the device to be driven or a device for clamping the device to be tested is

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The version with the support can be used to advantage with lawnmowers, for example, whereby the support can be a slotted pipe or a cylinder that is placed on the lawnmower and inside of which the moving cable is located. The version with a clamping device is particularly suitable for workshops, whereby the device to be started, e.g. the chainsaw, is then attached to the tool table with the clamping device and the starter motor is connected to the device's pull starter via a special device.

In one version, the starter motor can be an electric motor that operates a cable winch. The motor only needs to be powerful enough to move the device's pull starter quickly enough via the cable winch and cable pull. The movement of the starter motor can be stopped using a switch before the cable is completely wound up. Such switches, which switch the electric motor off again when the cable winch is fully wound up, are commercially available. This version is particularly suitable for workshop facilities where electricity is available.

In a further embodiment, the starter motor can be a pneumatically or hydraulically operated single-stroke piston motor. This design is also particularly suitable for workshops, since compressed air for operating a pneumatic cylinder or hydraulic fluid is normally available there. A pneumatic or hydraulic cylinder has the advantage that a linear movement is present, which corresponds to the linear movement for operating the pull starter. The starter motor can therefore be started by supplying pneumatic or hydraulic

hydraulic energy and, via a cable pull, also sets the pull starter in rapid motion so that the device's combustion engine starts.

In a further embodiment of the invention, a pull rope transmission can be built into the pull rope. This transmission can be constructed in the manner of a pulley and has the advantage that a cylinder or a motor with a relatively small stroke is sufficient to move the pull rope a relatively long distance. Since conventional pull rope starters have a maximum length of 1 m, with a 1:5 transmission a movement of the starter motor of 20 cm is sufficient to fully extend the pull rope and thus the pull rope starter. Such short starter motors, compressed air or hydraulic cylinders are commercially available and inexpensive. Their force can be selected via the piston area, so that there is sufficient torque to pull the pull rope starter quickly and firmly enough and to start the device's engine despite the 1:5 transmission given as an example.

In a preferred embodiment of the invention, (lockable) swivel arms are provided which guide the pull rope. With these swivel arms, the point of attack and the pulling direction of the device can be adapted to the jammed device. The device also allows completely different devices to be started in terms of the arrangement of the pull rope starter and its pulling direction.

In a further embodiment of the invention, a device for extracting/discharging the exhaust gas and/or for

Cleaning of the exhaust gases is provided. This design has the advantage that operation is also possible indoors without polluting the ambient air in the room and without violating occupational health and safety guidelines. Portable two-stroke engines or diesel engines in particular emit particularly high concentrations of pollutants when cold starts are carried out. Here, the device reliably prevents the particle and pollutant limits from being exceeded within the workshop. The variant with exhaust gas cleaning also allows work to be carried out without an exhaust to the outside. If an exhaust leading to the outside is used, this can be directed directly onto the street, as the exhaust gases are detoxified and odorless.

Further aims, advantages, features and possible applications of the present invention will become apparent from the embodiment shown in the drawings. All described and/or illustrated features, either individually or in any combination, form the subject matter of the present invention, regardless of their summary in the claims or their reference back to them.

Show it:

Figure 1 is a schematic view of a device according to the invention,

Figure 2 shows a clamping plate for chainsaws according to the invention,

Figure 3 is a side view of a device according to the invention and

Figure 4 is a rear view of a device according to the invention.

Figure 1 shows a table housing 1, the size of which is approximately 700x700x420 mm. An oil pan 2 is arranged on the top of the table housing 1. In the lower part of the table housing 1 there is an air cylinder 3 as a single-stroke piston motor, which in this version has a stroke of approximately 135 mm and a piston area with a diameter of 100 mm. The air inlet 4 of an actuating valve (not shown) is arranged on its underside. Above the table are the two swivel arms 14, which are based on a lockable pivot point 7 on the table and which carry the two deflection rollers 8 and 9, over which a pull rope 6 (here, for example, an 8 mm thick nylon cord) is guided. The deflection rollers 8 and 9 are assigned lockable joints, which allow the arms 14 and the end piece 14a to be adjusted and locked against each other. The pull rope 6 is guided in the table housing 1 via the pull rope transmission 5 to the movable piston of the air cylinder 3. At the free end of the pull rope 6 there is a hook 13 (e.g. a snap hook) with which the rope 6 is placed around the T-handle of the pull starter of the device to be started. This is not shown here, but was attached to the oil collecting pan 2 of the table housing 1.

As a further protective device, a plastic hose 9a is provided in Figure 1, which is located at the end piece 14a below the deflection roller 9 and covers the moving rope piece 6 up to the snap hook 13. This can be a flexible plastic hose, which consists of a material, for example,

as is known from camping tent windows. The hose 9a can have a stabilizing ring at its lower end, by which it can be pushed up, whereby in use, after pushing up the hose 9a, the snap hook 13 can be attached to the T-piece of the cable hook. If the hose 9a is then lowered, all moving parts are covered. The risk of injury from the mechanic reaching into the moving parts is eliminated. The same applies to the chain saw bar if the chain is not removed. In this case, an appropriate protective device can be folded over it. The protective device can be transparent or a closed box, for example made of sheet metal.

About the function:

With the assumed stroke of approximately 135 mm of the pneumatic cylinder 3 and a pull rope ratio of approximately 1:5, the pull rope length of conventional devices is in the range of 60 to 70 cm. The pivot point 7 serves to pivot the arms 14 carrying the deflection rollers 8, 9 for the pull rope 6. The arms 14 and the end piece 14a can thus be rotated into the desired position and locked securely so that the roller 9 is located above the handle of the pull rope starter of the clamped device. The pulling direction of the pull rope 6 can also be adapted to the lateral inclination of the device's starter; some go vertically upwards, others at a 45° angle. The device can be universally adapted to these conditions using the arms 14 and 14a according to the invention.

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The device is operated with a pneumatic hand valve (not shown). This hand valve is constructed in a similar way to a proportional valve. When its lever is slowly moved, some air flows into the cylinder 3 and slowly moves the piston downwards. This slowly pulls the rope 6 so that the hook 13 can be hooked into the T-handle of the rope starter and the rope 6 can be tightened. After it has clicked into place, the mechanic can fully press the lever of the hand valve, which causes the piston in the cylinder 3 to move downwards quickly and thus the rope 6 to move upwards in a strong pull. At this moment the rope starter is operated and the device's combustion engine starts at high speed.

Figure 2 shows a clamping plate 15 as a fastening device for fastening a chain saw to the oil pan 2 of the device according to the invention. The clamping plate 15 has two stabilizations 10 and 11 for clamping the chain bar and a clamping bracket 12 for fastening the handle of the chain saw. The adjustable side stabilization 10 for the chain bar works together with the fixed side stabilization 11 in the sense that an inserted chain bar is pressed against the counterpart 11 by tightening the screw 10 and the chain bar is thus held securely, whereby the chain can rotate freely after the combustion engine has started.

The handle of the chainsaw is held by the clamping bracket 12 with rubber covering and locking spindle. To do this, the flat underside of the lower handle of the chainsaw is placed on the clamping plate 15 and secured with the clamping bracket 12.

screwed tight. The chainsaw is thus firmly attached to the work table 1. The side stabilization 10 and the side stabilization 11 can be made of flat iron, which are welded vertically onto the clamping plate 15. Rubber buffers make the device flexible and safe. If the chainsaw is placed on the clamping plate 15 and the claw 12 is tightened, the chainsaw is fixed and then lies stable on the oil pan 2.

When the chain saw is started by operating the device, its oiler also starts working. The oil collecting tray 2 is used to collect this oil. After work is done, it can be wiped clean or a drain opening can be provided in the oil collecting tray 2 to collect the oil.

Figure 3 shows an embodiment of the invention with exhaust gas purification. The oil collecting tray 2 is located at the top of the table housing 1. The device drawer 22 is located in the table. Shown is a partition wall 23 in the table as well as an access door 25 for the exhaust gas purification and for changing the filter, as well as a protective grille 26, which also serves as an air outlet for the exhaust gas purification.

Figure 4 shows a schematic of the structure of an exhaust gas purification system with a special cleaning filter 27 with activated carbon, a radial tube fan 28, a flexible exhaust gas hose 29, a collecting funnel 16 and an adjustable holder 17 for the collecting funnel 16. All suitable devices can be used as cleaning elements or filters 27. It has been found to be particularly advantageous

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It has proven to be beneficial to use activated carbon filters, such as ABC filters, as designed for the Leopard tank. These filters are relatively inexpensive to obtain and have a very large surface area, so that filter replacement is rarely necessary.

The flexible exhaust hose 29 with its collecting funnel 16 is positioned on the device attached to the oil pan 2 via the adjustable holder 17 in such a way that the funnel 16 is attached as close as possible to the exhaust opening. When the radial fan is switched on (this can in particular be an explosion-proof tube fan), an air stream is sucked out of the device, which takes practically all of the exhaust gases with it. The two-stroke or diesel exhaust gas is sucked in and pressed through the carbon filter 27 via the flexible hose 29. The hydrocarbons in the exhaust gas are captured in the carbon filter 27 so that purified, odorless and soot-free air leaves the filter 27 again via the protective grille 26. In this way, a test run of a chainsaw engine can be carried out indoors even in winter or in bad weather.

In addition to chainsaws, brush cutters and other devices can also be started with this device. The brush cutter is fixed where the chainsaw is attached in Figure 1.

Today, mini diesel engines with up to 3.5 hp are increasingly being used. These can also be easily started using the invention.

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List of reference symbols

1 Table housing 2 Oil pan 3 Air cylinder 4 Air inlet 5 Traction rope ratio 6 Pull rope 7 pivot point 8th Pulley 9 Pulley 9a Plastic hose 10 Lateral stabilization 11 Lateral stabilization 12 Clamping bracket 13 Hook 14 poor 14a End piece 15 Clamping plate 16 Collecting funnel 17 holder 22 Equipment drawer 23 Partition wall 25 Access door 26 Protective grille 27 Cleaning filter 28 Radial tube fan 29 Exhaust hose

Claims (7)

1. Device for starting devices with internal combustion engines having a pull-cord starter, characterized in that a starter motor is provided which actuates the pull-cord starter via a pull rope ( 6 ). 2. Device according to claim 1, characterized by a device for supporting the device or for clamping the device. 3. Device according to claim 1 or claim 2, characterized in that the starter motor is an electric motor which operates a cable winch. 4. Device according to claim 1 or claim 2, characterized in that the starter motor is a pneumatically or hydraulically operated single-stroke piston motor (air cylinder 3 ). 5. Device according to one of the preceding claims, characterized by a traction cable transmission ( 5 ). 6. Device according to one of the preceding claims, characterized by pivot arms ( 14 ) for cable guidance. 7. Device according to one of the preceding claims, characterized by devices for extracting and/or cleaning the exhaust gas.