CN211671498U - Working machine - Google Patents
Working machine Download PDFInfo
- Publication number
- CN211671498U CN211671498U CN202020093672.2U CN202020093672U CN211671498U CN 211671498 U CN211671498 U CN 211671498U CN 202020093672 U CN202020093672 U CN 202020093672U CN 211671498 U CN211671498 U CN 211671498U
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- China
- Prior art keywords
- motor
- battery
- center axis
- rear housing
- controller
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D34/00—Mowers; Mowing apparatus of harvesters
- A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
- A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
- A01D34/63—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis
- A01D34/76—Driving mechanisms for the cutters
- A01D34/78—Driving mechanisms for the cutters electric
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D34/00—Mowers; Mowing apparatus of harvesters
- A01D34/835—Mowers; Mowing apparatus of harvesters specially adapted for particular purposes
- A01D34/90—Mowers; Mowing apparatus of harvesters specially adapted for particular purposes for carrying by the operator
- A01D34/902—Ergonomic provisions
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- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Harvester Elements (AREA)
Abstract
The utility model provides a technique that can make the rear portion casing of operation machinery miniaturized. The present specification discloses a work machine having an operating lever. The working machine includes: an operating lever; a tool provided in a front portion of the operation lever; a motor for driving the tool; a rear housing provided at the rear of the operation lever; a battery detachably attached to the rear housing and configured to supply electric power to the motor; and a controller housed in the rear housing and configured to control an operation of the motor. The battery is disposed such that a center axis of the battery is inclined with respect to a center axis of the operation lever when the rear housing is viewed from a side plane, and the controller is disposed such that a center axis of the controller is inclined with respect to a center axis of the operation lever when the rear housing is viewed from a side plane.
Description
Technical Field
The technology disclosed in the present specification relates to a work machine.
Background
Patent document 1 discloses a working machine. The work machine includes an operation lever, a tool provided on a front portion of the operation lever, a motor for driving the tool, a rear housing provided on a rear portion of the operation lever, a battery detachably attached to the rear housing for supplying electric power to the motor, and a controller housed in the rear housing for controlling an operation of the motor. In the work machine of patent document 1, the battery is disposed such that the center axis of the battery is perpendicular to the center axis of the operation lever when the rear housing is viewed from a side plane, and the controller is disposed such that the center axis of the controller is parallel to the center axis of the operation lever when the rear housing is viewed from a side plane.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2011-239789
SUMMERY OF THE UTILITY MODEL
Problem to be solved by utility model
In a work machine having an operation lever, when the rear housing is large, the body of an operator is likely to contact the rear housing when the operator uses the work machine to perform work. The situation where the body of the worker comes into contact with the rear housing during the work is troublesome for the worker. Therefore, the rear housing of the working machine is required to be downsized.
In the present specification, a technique is provided that enables a rear housing of a work machine to be downsized.
Means for solving the problems
The present specification discloses a work machine having an operating lever. The working machine includes: an operating lever; a tool provided in a front portion of the operating lever; a motor for driving the tool; a rear housing provided at a rear portion of the operation lever; a battery detachably attached to the rear housing and configured to supply electric power to the motor; and a controller that is housed in the rear case and controls an operation of the motor, wherein the battery is disposed such that a center axis of the battery is inclined with respect to a center axis of the operation lever when the rear case is viewed from a side plane, and the controller is disposed such that a center axis of the controller is inclined with respect to a center axis of the operation lever when the rear case is viewed from a side plane.
The height of the rear housing is largely dependent on the height of the battery mounted to the rear housing. Here, the height is a length in the vertical direction when the direction in which the center axis of the operation lever extends is defined as the front-rear direction. According to the above configuration, when the rear housing is viewed from a side plane, the battery is disposed such that the center axis of the battery is inclined with respect to the center axis of the operating lever. Therefore, the height of the rear case can be reduced as compared with the case where the center axis of the battery is perpendicular to the center axis of the operation lever. Further, the length of the rear housing along the center axis of the operating lever largely depends on the length of the controller housed in the rear housing along the center axis of the operating lever. According to the above configuration, when the rear housing is viewed from a side plane, the controller is disposed such that a center axis of the controller is inclined with respect to a center axis of the operation lever. Therefore, the length of the rear housing along the center axis of the operation lever can be shortened as compared with the case where the center axis of the controller is parallel to the center axis of the operation lever. Thus, the rear housing can be miniaturized.
When the rear case is viewed from the side plane, the center axis of the battery and the center axis of the controller may intersect at an acute angle.
The motor may be housed in the rear case.
The work machine may further include a transmission shaft that is housed in the operating lever and transmits the power of the motor to the tool, and the transmission shaft may be directly coupled to an output shaft of the motor.
The motor may be a brushless motor.
Drawings
Fig. 1 is a perspective view of a brush cutter 2 of the present embodiment.
Fig. 2 is a sectional view of the rear unit 40 of the present embodiment.
Description of the reference numerals
2. A brush cutter; 20. a shearing blade unit; 22. a rod fixing portion; 24. a shearing blade fixing portion; 26. a shearing blade; 28. a safety shield; 29. a lubricating oil supply section; 30. an operating lever; 30a, a front portion; 30b, a rear portion; 32. a transmission shaft; 33. starting a switch; 34. a handle; 34a, a right handle; 34b, left handle; 36. an electric wire; 40. a rear unit; 42. a rear housing; 42a, a front portion; 42b, a rear portion; 42c, an upper surface; 42d, lower surface; 43a to 43d, drain holes; 44. a motor; 46. an output shaft; 48. a connecting member; 50. a controller; 60. a battery mounting portion; 70. a battery; 80. a battery shield; 82. a rear extension; 82a, a drain hole; 82b, a drain hole; 84. an upper extension portion.
Detailed Description
In one or more embodiments, when the rear case is viewed from a side plane, the center axis of the battery and the center axis of the controller may intersect at an acute angle.
According to the above configuration, the height of the rear case can be made lower and the length of the rear case along the center axis of the operating lever can be made shorter, as compared with a case where the center axis of the battery and the center axis of the controller intersect at an obtuse angle when the rear case is viewed from the side plane. Thus, the rear housing can be further miniaturized.
In one or more embodiments, the motor may be housed in the rear case.
Depending on the type of work machine, it may be advantageous to dispose the motor on the rear side of the operating lever in consideration of the weight balance of the work machine. According to the above configuration, even if the motor is housed in the rear housing, the central axis of the battery and the central axis of the controller are disposed to be inclined with respect to the central axis of the operation lever, and the rear housing can be made compact.
In one or more embodiments, the work machine may further include a transmission shaft that is housed in the operating lever and transmits the power of the motor to the tool, and the transmission shaft may be directly coupled to an output shaft of the motor.
When the motor is coupled to the transmission shaft passing through the operation lever via a mechanism such as a reduction gear in the rear housing, the rear housing increases the amount of the mechanism such as the reduction gear. According to the above configuration, the reduction gear and the like are not disposed in the rear case. Thus, the rear housing can be miniaturized.
In one or more embodiments, the motor may be a brushless motor.
Since the moment of inertia of the rotor of the brushless motor is small, the motor can be rapidly decelerated and stopped. According to the above configuration, when the load is abruptly increased, the motor can be quickly decelerated or stopped.
(examples)
The brush cutter 2 of the present embodiment is explained with reference to fig. 1 and 2. Fig. 1 is a perspective view of the brush cutter 2. In addition, fig. 2 is a sectional view of the rear unit 40 of the brush cutter 2. As shown in fig. 1, the brush cutter 2 includes a shearing blade unit 20, an operation lever 30, and a rear unit 40. In the following description, the longitudinal direction of the operation lever 30 is referred to as the front-rear direction, the vertical direction in fig. 2 is referred to as the vertical direction, and the direction perpendicular to the front-rear direction and the vertical direction is referred to as the horizontal direction.
(construction of the operation lever 30)
The operation rod 30 has a hollow tubular shape and extends linearly. The cutting blade unit 20 is provided at the front portion 30a of the operating lever 30, and the rear unit 40 is provided at the rear portion 30b of the operating lever 30. The operating rod 30 connects the shearing blade unit 20 and the rear unit 40. A transmission shaft 32 (see fig. 2) is rotatably housed inside the operation lever 30. Further, the operating lever 30 is provided with a handle 34 for a user to hold. The handle 34 is composed of a right handle 34a and a left handle 34 b. A trigger-type activation switch 33 is provided on the right handle 34 a. The start switch 33 is electrically connected to the rear unit 40 with an electric wire 36. The electric wire 36 is routed from the rear unit 40 to the right handle 34a along the operation lever 30. The start switch 33 is a switch for controlling the operation of a motor 44 (see fig. 2) of the rear unit 40 described later.
(Structure of shearing blade unit 20)
The shearing blade unit 20 includes a rod fixing part 22, a shearing blade fixing part 24, and a safety cover 28. The distal end portion of the operation lever 30 is inserted into the lever fixing portion 22. A disk-shaped shear blade 26 is attached to the shear blade fixing portion 24. Specifically, the cutting blade 26 is fixed to a cutting blade shaft (not shown) in the cutting blade fixing portion 24. The shear blade shaft is connected to a transmission shaft 32 in the operating lever 30 via a gear (not shown) in the lever fixing portion 22. The safety cover 28 is provided at a position rearward of the lever fixing portion 22. Further, the rod fixing portion 22 includes a lubricant oil supply portion 29 for supplying lubricant oil to the gears in the rod fixing portion 22. The lubricant oil supply portion 29 is provided with a hole (not shown) for supplying lubricant oil to the gear in the rod fixing portion 22. As shown in fig. 1, in the use state of the brush cutter 2, the hole of the lubricant oil supply portion 29 is closed with a bolt B. By removing the bolt B, the lubricant can be supplied to the gear in the rod fixing portion 22 through the hole of the lubricant supply portion 29.
(Structure of rear unit 40)
The rear unit 40 includes a rear housing 42 and a battery cover 80. As shown in fig. 2, the rear portion 30b of the operation lever 30 is coupled to the front portion 42a of the rear housing 42. A battery mounting portion 60 to which the battery 70 is attached and detached is provided at the rear portion 42b of the rear case 42.
The rear housing 42 includes 4 drain holes 43a to 43 d. The drain hole 43a is provided above the rear portion 42b of the rear housing 42, and the drain hole 43b is provided below the rear portion 42 b. The drain holes 43a and 43b are holes for discharging water in the rear housing 42 in a state where the center axis L1 of the control lever 30 is oriented in the vertical direction. The drain hole 43c is provided on the rear side of the lower surface 42d of the rear housing 42, and the drain hole 43d is provided on the front side of the lower surface 42 d. The drain holes 43c, 43d are holes for draining water in the rear housing 42 of the brush cutter 2 in the state shown in fig. 2.
The rear housing 42 houses the motor 44 and the controller 50. The motor 44 is a brushless dc motor. The rotational axis of the motor 44 coincides with the rotational axis of the transmission shaft 32 of the operation lever 30 (i.e., the central axis L1 of the operation lever 30). The motor 44 is used to rotate an output shaft 46. The output shaft 46 is fixed to the transmission shaft 32 via a coupling member 48. The output shaft 46 of the motor 44 is directly coupled to the transmission shaft 32 without a reduction mechanism.
The controller 50 controls the operation of the motor 44 by controlling the electric power supplied from the battery 70 to the motor 44. The controller 50 is provided above the motor 44. When the rear housing 42 is viewed from the side plane, the front end of the controller 50 is located forward of the front end of the motor 44, and the rear end of the controller 50 is located rearward of the rear end of the motor 44. When the start switch 33 (see fig. 1) of the right handle 34a of the operation lever 30 is turned on, the controller 50 drives the motor 44, and when the start switch 33 is turned off, the controller 50 stops the motor 44. When the rear housing 42 is viewed from the side plane, the controller 50 is disposed such that the central axis L2 of the controller 50 is inclined with respect to the central axis L1 of the operating lever 30. The central axis L2 of the controller 50 is an axis in the longitudinal direction of the controller 50 when the controller 50 is viewed from a side plane. Specifically, the controller 50 is inclined at a predetermined angle α 1 (12 degrees in the present embodiment) with respect to the front-rear direction so as to be inclined forward and downward. In addition, the upper surface 42c of the rear housing 42 has a shape along the controller 50. That is, the upper surface 42c is inclined with respect to the front-rear direction so as to be inclined forward and downward. Further, the lower surface 42d of the rear housing 42 is substantially parallel with respect to the central axis L1 of the operating lever 30. Thus, the height of the rear housing 42 gradually decreases toward the front. By reducing the height of the rear housing 42 on the front side, the body of the operator can be prevented from coming into contact with the rear housing 42 when the operator performs work using the brush cutter 2.
The mounting structure of the battery 70 in the rear case 42 is explained. As described above, the battery mount portion 60 is provided at the rear portion 42b of the rear case 42. The battery mounting portion 60 has a structure in which the battery 70 can be attached and detached. The battery mount portion 60 slidably receives the battery 70. The sliding direction of the battery 70 in the battery mount portion 60 is inclined with respect to the center axis L1 of the operation lever 30. Specifically, the sliding direction of the battery 70 is inclined with respect to the vertical direction in such a manner that the lower direction is inclined forward. Therefore, as shown in fig. 2, in a state where the battery 70 is mounted on the battery mounting portion 60, the center axis L3 of the battery 70 is inclined with respect to the vertical direction so as to be inclined downward toward the front. Here, the central axis L3 of the battery 70 is an axis in the longitudinal direction of the battery 70 when the battery 70 is viewed from a side plane. The center axis L3 of the battery 70 is inclined at a predetermined angle α 2 (110 degrees in the present embodiment) with respect to the center axis L1 of the operating lever 30 when the rear housing 42 is viewed from the side plane. Further, the center axis L3 of the battery 70 is inclined at a predetermined angle α 3 (60 degrees in the present embodiment) as an acute angle with respect to the center axis L2 of the controller 50 when the rear housing 42 is viewed from a side plane. In addition, the motor 44 and the controller 50 are provided at a position forward of the battery 70 in a state where the battery 70 is mounted to the battery mounting portion 60. When the rear housing 42 is viewed from the side plane, the upper end of the battery 70 is positioned above the upper end of the motor 44, and the lower end of the battery 70 is positioned below the lower end of the motor 44. When rear case 42 is viewed from the side plane, the upper end of battery 70 is positioned above the upper end of controller 50, and the lower end of battery 70 is positioned below the lower end of controller 50.
The battery guard 80 serves to protect the battery 70 from impact. The battery guard 80 is attached to the lower surface 42d of the rear housing 42. The battery cover 80 includes a rearward extending portion 82 extending rearward from the lower surface 42d of the rear case 42, and an upper extending portion 84 extending upward from a rear end of the rearward extending portion 82. The rearward extending portion 82 and the upward extending portion 84 have a shape along the battery 70 in a state of being mounted to the battery mounting portion 60. Specifically, a portion of the rearward extending portion 82 on the rearward side of the rear housing 42 is inclined rearward and downward. The upper extending portion 84 is inclined so as to be inclined rearward in the up direction. The rear extension 82 is provided with drain holes 82a, 82 b. The drain hole 82a is disposed below the lower surface 42d of the rear housing 42 and communicates with the drain hole 43c of the lower surface 42 d. The drain hole 82b is disposed below the battery 70.
As described above, as shown in fig. 1 and 2, the brush cutter 2 according to one embodiment includes the operating lever 30, the shear blade unit 20 provided on the front portion 30a of the operating lever 30, the motor 44 for driving the shear blade unit 20, the rear housing 42 also provided on the operating lever 30, the battery 70 detachably attached to the rear housing 42 for supplying electric power to the motor 44, and the controller 50 housed in the rear housing 42 for controlling the operation of the motor 44. As shown in fig. 2, when the rear housing 42 is viewed from the side plane, the battery 70 is disposed such that the center axis L3 of the battery 70 is inclined with respect to the center axis L1 of the operation lever 30. Further, when the rear housing 42 is viewed from a side plane, the controller 50 is disposed such that the central axis L2 of the controller 50 is inclined with respect to the central axis L1 of the operating lever 30. According to the above configuration, the height of the rear case 42 can be reduced as compared with the case where the center axis L3 of the battery 70 is perpendicular to the center axis L1 of the operating lever 30. Further, the length of the rear housing 42 along the center axis of the operation lever 30 can be shortened as compared with the case where the center axis L2 of the controller 50 is parallel to the center axis L1 of the operation lever 30. Thus, the rear housing 42 can be miniaturized. As a result, when the operator performs work using the brush cutter 2, the contact between the body of the operator and the rear housing 42 can be suppressed.
In the brush cutter 2 of the embodiment, as shown in fig. 2, when the rear housing 42 is viewed from a side plane, the central axis L3 of the battery 70 and the central axis L2 of the controller 50 intersect at an acute angle (predetermined angle α 3). For example, in a state in which the battery 70 is mounted to the battery mounting portion 60 of the rear case 42 as shown in fig. 2, if the controller 50 is disposed such that the center axis L3 of the battery 70 and the center axis L2 of the controller 50 intersect at an obtuse angle, the height of the rear case 42 is increased. In a state where the controller 50 is disposed in the rear case 42 as shown in fig. 2, if the battery 70 is disposed such that the center axis L3 of the battery 70 and the center axis L2 of the controller 50 intersect at an obtuse angle, the length of the rear case 42 along the center axis of the operating lever 30 becomes long. As described above, when the rear housing 42 is viewed from the side plane, the rear housing 42 becomes larger when the center axis L3 of the battery 70 and the center axis L2 of the controller 50 intersect at an obtuse angle, as compared with a case where the center axis L3 of the battery 70 and the center axis L2 of the controller 50 intersect at an acute angle. Therefore, when the rear case 42 is viewed from a side plane, the central axis L3 of the battery 70 and the central axis L2 of the controller 50 intersect at an acute angle (predetermined angle α 3), whereby the rear case 42 can be further miniaturized.
In the brush cutter 2 according to one embodiment, as shown in fig. 2, the motor 44 is housed in the rear housing 42. According to the above configuration, even if the motor 44 is housed in the rear case 42, the rear case 42 can be downsized by arranging the battery 70 and the controller 50 such that the center axis L3 of the battery 70 and the center axis L2 of the controller 50 are inclined with respect to the center axis L1 of the operating lever 30.
In the brush cutter 2 according to one embodiment, as shown in fig. 2, the working machine further includes a transmission shaft 32, the transmission shaft 32 being housed in the operating lever 30 and transmitting the power of the motor 44 to the shear blade unit 20, and the transmission shaft 32 being directly coupled to an output shaft 46 of the motor 44. When the motor 44 is coupled to the transmission shaft 32 passing through the operation lever 30 via a mechanism such as a reduction gear in the rear case 42, the amount of the mechanism such as the reduction gear in the rear case 42 increases. According to the above configuration, no mechanism such as a reduction gear is disposed in the rear case 42. Thus, the rear housing 42 can be miniaturized.
In the brush cutter 2 of one embodiment, as shown in fig. 2, the motor 44 is a brushless motor. Since the moment of inertia of the rotor of the brushless motor is small, the motor 44 can be decelerated and stopped quickly. According to the above configuration, the motor 44 can be quickly decelerated or stopped when the load is abruptly increased.
Specific examples of the present invention have been described above in detail, but these are merely examples and do not limit the claims. The techniques described in the claims include various modifications and changes made to the specific examples illustrated above.
(modification 1) "working machine" is not limited to the brush cutter 2, and may be a hedge trimmer, a pole saw, a cultivator, a blower, or the like.
(modification 2) the center axis L3 of the battery 70 and the center axis L2 of the controller 50 may intersect at an obtuse angle. Generally, the battery 70 and the controller 50 are configured to be more compact than the rear case in the following case: the battery is arranged in such a manner that the center axis L3 of the battery 70 is perpendicular to the center axis L1 of the operation lever 30, and the controller 50 is arranged in such a manner that the center axis L2 of the controller 50 is parallel to the center axis L1 of the operation lever 30.
(modification 3) the cutting blade unit 20 may include a motor 44. In this case, a wire harness or the like connecting the controller 50 and the motor 44 is provided in the operation lever 30 instead of the transmission shaft 32.
(modification 4) the output shaft 46 of the motor 44 and the transmission shaft 32 of the operation lever 30 may be connected via a reduction gear.
(modification 5) the motor 44 may be a brushed dc motor or another type of motor such as an ac motor.
(modification 6) the sliding direction of the battery 70 may be different from the direction of the central axis L3 of the battery 70. For example, the battery 70 may be slidable in the left-right direction.
The technical elements described in the specification or the drawings exhibit technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. Further, the technology illustrated in the present specification or the drawings can achieve a plurality of objects at the same time, and achieving one of the objects has its usefulness in the art itself.
Claims (5)
1. A working machine is characterized in that a working machine is provided,
the working machine includes:
an operating lever;
a tool provided in a front portion of the operating lever;
a motor for driving the tool;
a rear housing provided at a rear portion of the operation lever;
a battery detachably attached to the rear housing and configured to supply electric power to the motor; and
a controller housed in the rear housing and configured to control an operation of the motor,
the battery is disposed such that a center axis of the battery is inclined with respect to a center axis of the operation lever when the rear housing is viewed from a side plane, and the controller is disposed such that a center axis of the controller is inclined with respect to a center axis of the operation lever.
2. The work machine of claim 1,
the center axis of the battery and the center axis of the controller intersect at an acute angle when the rear housing is viewed from a side plane.
3. The work machine according to claim 1 or 2,
the motor is housed in the rear housing.
4. The work machine of claim 3,
the work machine further includes a transmission shaft received in the operating lever and transmitting power of the motor to the tool,
the transmission shaft is directly coupled to an output shaft of the motor.
5. The work machine according to claim 1 or 2,
the motor is a brushless motor.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019055412A JP7199273B2 (en) | 2019-03-22 | 2019-03-22 | work machine |
| JP2019-055412 | 2019-03-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211671498U true CN211671498U (en) | 2020-10-16 |
Family
ID=69885853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020093672.2U Active CN211671498U (en) | 2019-03-22 | 2020-01-16 | Working machine |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP7199273B2 (en) |
| CN (1) | CN211671498U (en) |
| DE (1) | DE202019005039U1 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5544143B2 (en) | 2009-11-04 | 2014-07-09 | リョービ株式会社 | Battery powered electric brush cutter |
| US9414540B2 (en) | 2010-03-24 | 2016-08-16 | Aero-Flex Technologies, Inc. | Oriented trimmer line |
| JP2014147355A (en) | 2013-02-01 | 2014-08-21 | Makita Corp | Electric bush cutter |
-
2019
- 2019-03-22 JP JP2019055412A patent/JP7199273B2/en active Active
- 2019-12-10 DE DE202019005039.6U patent/DE202019005039U1/en active Active
-
2020
- 2020-01-16 CN CN202020093672.2U patent/CN211671498U/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| JP2020150904A (en) | 2020-09-24 |
| DE202019005039U1 (en) | 2020-03-03 |
| JP7199273B2 (en) | 2023-01-05 |
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