KR0123884B1 - Stuffing grass mower for a d.c. generator - Google Patents

Abstract

In a rechargeable mower in which a motor(11) of a power generating device(10) mounted on one end of a handle bar(1) is driven by a voltage of a rechargeable battery, grass is cut by transmitting a rotatory force generated from the motor(11) to a cutter(30) through a power transmission device(20), a grass-insertion preventing device(40) for preventing grass from inserting in a space between the lower end of a motor cover(12) with a built-in motor(11) and the upper part of the cutter(30), a supporting device(50) of no load operation connected to a screw(23) of the power transmission device(20) is placed at the lower part of the cutter(30) for supporting and fixing the cutter(30), rotating without a load when it contacts with the ground. The mower is convenient and free from danger for use by attaching a shoulder strap to the mower to bear it on a shoulder and preventing the cutter from trembling and bounding during the operation.

Description

Rechargeable mowers

1 is a perspective view showing the entire configuration of a rechargeable mower according to the present invention.

2 is an exploded perspective view showing the main configuration of the lawn mower of the present invention.

Figure 3 is a longitudinal sectional view showing a bonding state of the lawn mower of the present invention.

4 is a state diagram used in the lawn mower of the present invention.

5 is a configuration diagram of a power supply control device according to the present invention lawn mower.

6 is a cross-sectional view of a direct current electric motor applied to the present invention.

* Explanation of symbols for main parts of the drawings

1: handle bar 10: power generating means

11: motor 12: motor cover

12c: circular groove 20: power transmission means

22: insertion ring 23: tightening screw

30: cutting member 40: loosening prevention means

41: cylindrical wall 42: insertion hole

50: idle support means 51: fixing member

51b: shaft 52: support

52a: Boss 52b: fastening groove

53: bearing 60: support strap

The present invention relates to a rechargeable mower, and in particular, to prevent the cutting of the grass between the motor cover and the cutting member of the mower, and also the cutting member and the support member for fixing the cutting member in contact with the ground and The present invention relates to a rechargeable mower, which makes it possible to prevent the driving part from bouncing or rocking.

BACKGROUND ART Mowers for engines are known in portable mobile mowers that are generally used.

The engine lawn mower uses a fuel to obtain a strong power, and by using the power to strongly rotate the blade to cut grass or weeds.

On the other hand, the rechargeable mower uses a power of a DC motor, that is, a motor, and is a device capable of mowing by rotating a blade by driving the motor with a charging voltage charged in a battery.

In the former engine mower, there is an advantage that the mow can be mowed regardless of the type of grass or weeds with the strong rotational force driven by the engine, but severe heat generation, noise and vibration are generated when the engine is driven. There was a problem that severe smoke occurs by driving the engine.

On the other hand, the latter type of mower uses the charging voltage of the battery as a power source, so the driving force is weaker than the mower for the engine, and thus it cannot bear the load during mowing, whereas heat, noise, vibration This small and light weight has the advantage of easy handling and use of the mower.

However, the above-mentioned conventional engine mowers and rechargeable mowers are both rotary blades, that is, the lower supporters for supporting and fixing the cutting members to the motor shaft of the motor are configured to rotate together with the cutting members. When it comes into contact with the ground, the cutting member that is rotated with it instantly bounces off or the entire lawnmower violently swings, causing serious injury to the worker or the people around him. There was a problem to be followed.

For this reason, the user should be careful not to contact the cutting member and the support of the mowing machine to the ground, and for this purpose, the mowing operation must be carried out in a state in which the support for supporting the cutting member is lifted by a predetermined distance from the ground. Not only easy to use and difficult to work for a long time, there was an inefficient problem, such as the grass to be cut is not cut to a uniform height.

On the other hand, between the conventional drive cover and the cutting member rotated in the lower portion of the prior art, since the specially defined special yarn, that is, the gap is formed, part of the weeds and the like cut during the mowing work and radially dispersed Difficulty is often caused that the cutting member is easily caught or wound between the motor cover, and thus, the cutting member is stopped and the load is excessively applied to the motor, resulting in the damage of the motor. There were inconveniences and problems such as stopping and removing weeds caught between the cutting member and the motor cover.

Therefore, the present invention was devised to solve all the disadvantages and problems of the conventional mowing machine as described above, and the main object of the present invention is a rocking phenomenon generated when the support hole for supporting and fixing the cutting member is in contact with the ground. And it is to provide a rechargeable mower that can be used more conveniently and safely by excluding the springing problem.

Another object of the present invention is to prevent the weeds cut between the cutting member and the motor cover during the mowing operation, to eliminate the rotation stop phenomenon of the cutting member and the overload factor of the motor generated during the operation, and to mow more efficient mowing operation In providing.

It is still another object of the present invention that the driving cutting part including the motor and the cutting member is installed at one end of the handle bar having a relatively long length, so that most of the weight can be handled and used more easily and easily. It is to provide a rechargeable mower.

An object of the present invention as described above comprises a support and support means that can be rotated or idling the support and the support means installed in the lower portion of the cutting member to support and fix the cutting member rotated at high speed by the motor, The gap formed between the motor cover and the cutting member may be provided with an anti-seating means for preventing the cut grass from being caught, and may be freely worn on the user's shoulder over the upper end of the motor and the rear end of the handle rod on which the motor is mounted. It can be achieved by having a support strap.

Hereinafter, the rechargeable mower of the present invention for achieving the above object will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing the overall configuration of the rechargeable mower according to the present invention, Figure 2 is an exploded perspective view showing the main configuration of the mowing device of the present invention, Figure 3 is a longitudinal cross-sectional view showing a coupling state of the lawn mower as shown therein The present invention drives the motor 11 of the power generating means 10 installed at one end of the handle bar 1 by the voltage of the rechargeable battery, the power transmission means 20 to rotate the torque generated from the motor 11 In the rechargeable mower to transfer the grass to the cutting member 30 to cut through, between the lower end of the motor cover 12, the motor 11 of the power generating means 10 is embedded and the upper surface of the cutting member 30 The anti-separation means 40 is installed to prevent pinching of the cut grass formed in the gap formed in the lower portion of the cutting member 30, the power transmission means 20 exposed to the lower portion of the cutting member 30. Is fastened to the fastening screw portion 23 of the It is provided with an idling support means 50 for holding and fixing the cutting member 30 while idling at the time of contact.

Since the rechargeable battery is similar to a battery of a general portable lawn mower used by an operator on his back, description and illustration thereof will be omitted.

The motor cover 12 of the power generating means 10 is provided with a cylindrical portion 12a in which the motor 11 is embedded and a connecting portion 12b connected and assembled with one end of the handle bar 1. A pair of cover members are assembled, and a circular recess 12c having a predetermined depth and depth is formed at the periphery of the lower surface of the cylindrical portion 12a, and the motor 11 is located at the center lower portion of the motor cover 12. The drive shaft 11a protrudes downward by a predetermined length.

At the end of the drive shaft (11a) is installed as described above, the transmission part of the power transmission means (20) provided with support rings (21) and insertion rings (22) having large and small radii, respectively, is fixedly installed. In the lower center of the ring 23, the fastening screw portion 23 to which the idle support means 50 is fastened is formed to protrude downward.

The cutting member 30 has an insertion hole 31 in which the insertion ring 22 is fitted in the center of the flat body where several cutting blades 31a are arranged at equal intervals. ) Is supported and fixed by the idling support means 50 which is fastened to the fastening screw 23 in the state of being fitted to the lower portion of the insertion ring (22).

The loosening prevention means 40 has a cylindrical circumferential wall 41 having a height substantially equal to the width of the gap formed between an upper surface of the cutting member 30 fitted to the insertion ring 22 and a lower surface of the motor cover 12. The upper body is composed of a cylindrical body, the circular insertion hole 42 formed in the center of the lower surface of the cylindrical body is inserted into the upper side of the insertion ring 22 is inserted into the cutting member 30 and the insertion hole 42 In the state where the peripheral upper surface portion of the support ring 22 is in contact with the lower edge of the support ring 22, the upper end portion 41a of the cylindrical circumferential wall 41 rotates the circular groove (12c) formed in the peripheral surface when the motor cover 12 Possibly inserted.

Reference numeral 43 in the figure shows a reinforcing rib formed on the inner surface of the cylindrical circumferential wall (41).

On the other hand, the idle support means 50 has a predetermined length and has a shaft rod (51b) in the lower center of the disc-shaped support plate (51a) and is fastened by screwing to the fastening screw portion 23 of the power transmission means (20). A fixing member 51 for supporting and fixing the cutting member 30 and the anti-separation means 40 inserted and assembled into the insertion ring 22 so as not to be separated from the lower portion, and rotatably outside the fixing member 51. It is composed of a support port 52 having a cylindrical boss (52a) to be assembled inside the hemispherical body.

To allow relative rotation between the fixing member 51 and the support port 52 to be smoothly performed between the outer circumferential surface of the fixing member 51 side shaft bar 51b and the inner circumferential surface of the boss 52 side boss 52a. The bearing 53 is provided, and the detachment prevention snap rings 54 and 55 are provided above and below the bearing 53, respectively.

In addition, a fastening groove 52b is formed at a lower portion of the support port 52 side boss 52a to expose a lower end of the shaft bar 51a of the fixing member 51 side.

The cap 56 is fastened to the fastening groove 52b by screwing, and the lower end of the shaft bar 51a is provided with a fixing member 51 and a hemispherical base support 52, that is, an idle support means 50. Hexagonal wrench grooves 51c are formed at the lower end of the fastening screw unit 23 of the power transmission means 20 so as to be fastened or detached.

Meanwhile, hooks 12d and 1a are respectively provided at the upper end of the motor cover 12 and the handle bar 1 of the present invention lawn mower configured as described above, and the hooks 12d and 1a are respectively provided by the user. Support strap 60 that can be worn over the shoulder is installed.

In the drawings, reference numeral 2 denotes the handle, and 3 denotes a conventional safety cover installed at the lower end of the motor cover 12 to prevent the grass cut by the cutting member 30 from being scattered toward the user. will be.

On the other hand, Figure 5 is a block diagram of a power supply control device applied to the present invention, the power supply control device and the AC / DC conversion unit 100 for dropping the input AC power (AC) voltage and converting it into a DC voltage; The voltage obtained by the voltage charging unit 101 according to the operator's choice, and the voltage charging unit 101 to convert the DC voltage obtained from the AC / DC conversion unit 100 to a predetermined level and discharge the battery 103. And a connection portion 102 for charging the battery 103 and connecting the voltage charged in the battery 103 to the DC motor 11 built in the lawn mower, and being located at the proper position of the handle bar 1. The switch 104 for supplying or blocking the charging voltage to the motor 11 of the power generating means 10, and detecting the charging voltage of the battery 103 to the worker through the buzzer 105 when the charging voltage is lower than the predetermined voltage. It is composed of a voltage detector 106 to inform.

In the above, the voltage discharged from the battery 103 is supplied to the motor 11 through the inner lead 13 of the handle bar 1 coupled with the connection portion 102.

6 is a cross-sectional view schematically showing the configuration of a DC motor which is a power generating means of the present invention, wherein the motor 11 is discharged from the battery 103 and is input through the connection part 102 and the conductive line 13. The drive shaft rotated by the commutator C initially by winding a predetermined number of coils 11c having a predetermined thickness between the commutator C rotated by a predetermined number and the slots of the core 11b loaded in a predetermined number ( 11a) and a magnet (B), which is a stator that is fixed to the bracket (D) at a certain distance from the rotor (A) and generates different magnetic fields in the rotor (A). It is.

When described in detail with reference to FIGS. 1 to 6 the action and effect of the lawn mower of the present invention configured as described above are as follows.

Prior to driving the lawn mower, the charging process of the battery 103 will be described with reference to FIG. 5 as follows.

First, when the operator connects the jacks J1 to J4 of the connection unit 102 to charge the battery 103, the input AC power source AC is at a predetermined level through the AC / DC converter 100. The voltage is enhanced and converted into DC voltage.

The DC voltage output from the AC / DC converter 100 is maintained at a constant level at a constant level through the voltage charger 101 to the battery 103 through the jacks J1 to J4 of the connection unit 102. It is charged as it is supplied.

When a predetermined time has elapsed and the battery 103 is charged and the lawn mower is driven by using the power source of the battery 103, first, the jacks J3 and J4 of the connection part 102 are connected to the voltage charge part 201. The jack J1 is separated from the jack J1, and the jack J5, J6 of the connecting portion 102 provided at the rear end of the handle bar 1 of the lawn mower.

In this state, when the operator puts the mower on the ground and connects the switch 104 installed on the handle bar 1, the power of the battery 103 is connected to the jacks J3 to J6 of the connection portion 102 and the switch 104. ), And is supplied to the motor 11 installed in the motor cover 12 through the conductive wire 13 in the handle bar 1.

When the power of the battery 103 is supplied to the motor 11 as described above, the commutator C shown in FIG. 6 initially operates to rotate the rotor A instantaneously.

That is, the initial rotation of the rotor (A) is initiated by the commutator (C), and thereafter between the electromagnetic field due to the charging current of the battery 103 flowing through the coil (11C) and the permanent field of the magnet (B) side The interaction generates the rotational force.

Rotor A of the motor 11 applied to the present invention is an embodiment, the thickness of 0.5T and the number of the number of the piled up to 90 pieces, the pile length is 44.7mm, outer diameter 41Φ, the number of slots 12 cores The coil 11c having a thickness of 0.6 Φ is wound around the coil 11 c and the commutator C has an outer diameter of 16 φ, and the magnet B has a length of 48 mm, a thickness of 7 mm, and a width of 50.3 mm. It is preferable to configure the permanent magnets, and in this case, the rotor rotates at an RPM of 3,530 to 4,080 ± 10% and generates a torque of 4 kg-cm.

As described above, when the shaft of the rotor A, that is, the drive shaft 11a of the motor 11 is rotated by the voltage of the battery 103, the support ring 21 installed at the lower end of the drive shaft 11a and the insertion are inserted. The ring 22 is rotated, and the slip preventing means 40 and the cutting member 30 supported on the upper and lower sides of the insertion ring 22 rotate together, and the idle support coupled to the lower end of the drive shaft 11a. The means 50 are rotated simultaneously.

Accordingly, in this state, the operator moves the handle bar 1 to the left or the right while moving the cutting member 30 in a state of maintaining the cutting member 30 which is rotated at high speed in parallel with the ground as shown in FIG. The grass or grass is cut from the blade part of 30).

The lawn mower of the present invention used as described above is provided between the motor cover 12 and the cutting member 30, the anti-separation means 40 which is rotated together with the cutting member 30, the anti-seizure means 40 is cut because the upper end of the cylindrical peripheral wall 41 is inserted into the circular groove 12c formed at the periphery of the lower surface of the motor cover 12 and the lower surface thereof is rotated in close contact with the upper surface of the cutting member 30. It is possible to completely prevent the cutter 30, etc., pinched by the member 30 from being caught between the cutting member 30 and the motor cover 12.

On the other hand, the support means 50 of the present grass mower as described above is fastened to the end of the drive shaft 21 is fixed member 51 for holding and supporting the cutting member 30 and the hemispherical support sphere surrounding the fixing member 51 Since the 52 is assembled to each other by the bearing 53, the cutting member 30 and the fixing member 51 continue to rotate when the lower end of the hemispherical support 52 contacts the ground during mowing. Since the support hole 52 is not idling or rotates in particular, the phenomenon in which the cutting member 30 springs out or the lawn mow swings is not generated at all.

Therefore, the operator can work while moving the lawn mower to the left and right without any vibration or impact even in the state in which the support hole 52 in contact with the ground, that is, the lower end of the hemispherical support hole 52 in contact with the ground. To completely eliminate the conventional difficulties and inconveniences and problems that had to work hard to lift the cutting member 30 from the ground, anyone can easily and safely work.

In addition, as described above, between the front and rear ends of the mowing machine of the present invention, that is, between the motor cover 12 mounted on the front end of the handle bar 1 and the rear end of the handle bar 1 on one shoulder of the operator. Since the support strap 60 which can be naturally worn is provided, the weight of the lawnmower, which was conventionally dependent only on the operator's hand, is equally distributed to the worker's hand and shoulder, so that the worker hardly feels the mower's weight. Mowing can be performed more simply and easily for a long time.

On the other hand, when the voltage of the battery 103 is lowered during the mowing operation as described above, the voltage detector 106 shown in FIG. 5 detects the discharge voltage of the battery 103, and the detected voltage is equal to or less than a predetermined voltage. The rear buzzer 105 generates a warning sound to inform the operator that the battery 103 is required to be charged.

In addition, in the case of mowing the blade to replace the cutting member 30 is worn or the fixed state of the cutting member 30 is unstable to solve this, the screw in the base 52 of the idle support means 50 The fixing member 51 fastened to the end of the fastening screw portion 23 by using a wrench that loosens the combined cap 56 and is inserted into the wrench groove 51c formed at the end of the shaft rod 51b of the internal fixing member 51. Loosen the support means 50 and then take the necessary measures, such as replacing the cutting member (50).

On the other hand, when the polarity of the voltage supplied from the battery 103 to the direct current motor, that is, the motor 11 is changed to three stages of the switch 104 provided on the handle bar 1, by selection of the switch 104. Since the operation of the motor 11 is stopped or the direction of rotation of the cutting member 30 can be rotated forward or reversely, the working conditions or directions, i.e., a narrow width such as paddy field, can not change the direction, or Efficient operation is possible when it is desired to discharge the cut grass in only one direction.

The present invention as described in detail above is a power generating means driven by the voltage of the rechargeable battery, that is, in the rechargeable mowing machine to cut the grass by rotating the cutting member by the power of the motor, which is formed between the cutting member and the motor kerbo It is provided with an anti-seizure means for preventing the cutting of the grass cut in the gap portion, and an idling support means for supporting the cutting member while idling in contact with the ground at the lower end of the drive shaft exposed to the lower portion of the cutting member On the other hand, since the upper end of the motor cover and the rear end of the handle rod on which the motor is mounted is provided with a support strap that can be freely hung on the user's shoulder, the support for fixing the cutting member to the drive shaft when the contact with the ground The mowing machine is more convenient by eliminating the rocking phenomenon and the springing problem of the cutting part. It can be used safely and eliminates the rotational stop of the cutting member and the motor damage caused by the work, improving work efficiency and extending the service life of the machine. Being able to use it has the effect of being able to perform mowing work for a long time without difficulty.

Claims (4)

The motor 11 of the power generating means 10 installed at one end of the handle bar 1 by the voltage of the rechargeable battery is driven, and the cutting force is generated by the cutting member through the power transmission means 20. In the rechargeable mower to transfer the grass to the 30, a gap formed between the lower end of the motor cover 12 in which the motor 11 of the power generating means 10 is embedded and the upper surface of the cutting member 30. A fastener preventing means 40 is installed to prevent the cut grass from being caught in the part, and a fastening screw part of the power transmission means 20 exposed to the lower part of the cutting member 30 is disposed below the cutting member 30. Rechargeable mower, characterized in that the support means (50) which is fastened to the 23) and is idle when in contact with the ground is provided for supporting and fixing the cutting member (30). The method of claim 1, wherein the loosening prevention means 40 is composed of a cylindrical body having a cylindrical circumferential wall 41 of substantially the same height as the gap formed between the lower portion of the motor cover 12 and the upper surface of the cutting member (30). The circular insertion hole 31 formed in the center of the lower surface of the cylindrical body is inserted together into the insertion ring 22 of the power transmission means 20 into which the cutting member 30 is inserted, and the cylindrical peripheral wall 41 of the Rechargeable mower, characterized in that the upper end is rotatably inserted into the circular groove (12c) formed on the lower periphery of the motor cover (12). The method of claim 1, wherein the idle support means 50 is fastened to the fastening screw portion 23 of the power transmission means 20 is inserted into the insertion ring 22, the means for preventing the catch 40 and the cutting member (30). And a hemispherical support port 52 rotatably coupled to the outside of the fixing member 51 to support and fix the fixing member 51 so as not to be separated from each other. Between the main surface and the inner circumferential surface of the boss (52a) of the support port 52 is provided with a bearing (53) for smoothly rotating the relative between the fixing member 51 and the support port 52, the support port 52 The fastening groove 52b formed in the lower portion of the rechargeable mower, which is fastened by screwing the cap 56 for opening and closing. According to claim 1, Support strap 60 is provided that can be worn over the shoulder of the worker between one end of the handle bar (1) and the upper end of the motor cover 12 installed on the other end of the handle bar (1) Rechargeable mowers.