JP2022011863A - Handle, work machine, vibration control member, and work machine system - Google Patents

Abstract

To provide an excellent handle which is attachable to a work machine, the work machine to which the handle is detachably attached, a vibration control member for the handle, and a work machine system including the handle.SOLUTION: A handle 20 may be attached to a work machine capable of driving a tip tool with a driving source and has: a holding part 21 which a worker can hold; and a vibration control part 30 which damps vibration transmitted from the work machine to the holding part 21. The holding part 21 is detachably attached to the vibration control part 30. The vibration control part 30 has: an attachment part 32 which is connected to the work machine; and an attached part to which the holding part 21 is attached. An elastic body 31 is disposed between the attachment part 32 and the attached part.SELECTED DRAWING: Figure 1

Description

The present invention relates to a handle that can be attached to and detached from a working machine, a working machine that can be attached to and detached from the handle, an anti-vibration member for the handle, and a working machine system.

The following Patent Document 1 discloses a working machine having a removable (sub) handle for enhancing workability. Further, in order to reduce the vibration transmitted to the operator's hand, the following Document 2 discloses a handle provided with a vibration-proof structure.

Japanese Unexamined Patent Publication No. 2004-249427 Japanese Unexamined Patent Publication No. 2006-142425

When the work machine is supported by a handle having a vibration-proof structure, the work machine body is supported via an elastic body such as rubber, so that the operation is not directly transmitted, which may be disadvantageous for detailed work. Further, when the vibration generated during work is relatively small, the degree of vibration isolation is not required so much, and when the vibration is high frequency, an elastic structure with a high spring constant is required, which is a preferable type of vibration isolation structure. Also changes depending on the work. In this way, when the work equipment is supported by the handle, the vibration-proof (elastic) structure may or may not be required, and the preferable vibration-proof performance may differ depending on the work. Therefore, the operator uses a different type of handle. It is necessary to have more than one, and there is a risk of bulkiness and loss.

In view of the above problems, an object of the present invention is to provide an excellent handle that can be attached to a working machine. Another object is to provide a working machine having an excellent handle. Another object is to provide a vibration-proof member that can be attached to and detached from the working machine. Yet another purpose is to provide a working machine system that includes excellent handles.

The first aspect of the present invention is a handle. This handle can be attached to a work machine in which the tip tool can be driven by a drive source, and has a grip portion that can be gripped by an operator and a vibration isolator that attenuates vibration from the work machine to the grip portion. The grip portion can be attached to and detached from the vibration isolator portion.

It is preferable that the grip portion can be selectively attached to both the vibration-proof portion and the working machine.

The anti-vibration portion is provided with a mounting portion and a mounted portion, the grip portion is provided with a grip portion mounting portion, and the mounting portion and the grip portion mounting portion are mounted on a predetermined mounting portion in a working machine. It is possible, and it is preferable that the grip portion mounting portion can be attached to the mounted portion.

An elastic body may be interposed between the mounting portion and the mounted portion.

The mounted portion includes a tubular portion having a through hole penetrating in a direction intersecting the grip axis of the grip portion, and a retaining member whose at least a part is located inside the elastic body through the through hole. It is preferable that the retaining member restricts the movement of the tubular portion in the grip axis direction.

The mounting portion may have a screw portion to be screwed into the working machine and a flange portion located around the screw portion.

It is preferable that the screw portion is formed with an insertion hole through which a part of the retaining member passing through the through hole is inserted.

The retaining member may be held in a non-contact state with at least one of the screw portion and the cylinder portion.

It is preferable that at least one of the vibration-proof portion and the grip portion can be selectively selected from a plurality of types.

The second aspect of the present invention is a working machine. This working machine has the handle and a mounting portion to which the grip portion and the vibration isolator portion of the handle can be selectively attached.

A third aspect of the present invention is a working machine. This work machine has a housing that houses the drive source and
It has a tip tool driven by the drive source and a handle that is detachably connected to the housing, the handle being connected to the housing via a vibration isolator and the vibration isolator. It has a grip portion that can be attached to and detached from the vibration isolator.

A fourth aspect of the present invention is a vibration-proof member for a handle that can be attached to a work machine, and is attached to which a mounting portion connected to the working machine and a grip portion that can be gripped by an operator are mounted. It has a portion and an elastic body interposed between the mounting portion and the mounted portion.

A fifth aspect of the present invention is a working machine system. This working machine system has a working machine having a mounting portion, a grip portion that can be mounted on the mounting portion, and a vibration-proof member that can be mounted on the mounting portion instead of the grip portion. The grip portion can be attached to the.

It should be noted that any combination of the above components and a conversion of the expression of the present invention between methods, systems and the like are also effective as aspects of the present invention.

INDUSTRIAL APPLICABILITY According to the present invention, it is possible to provide an excellent handle that can be attached to a work machine, a work machine that can be attached to and detached from the handle, a vibration isolator for the handle, and a work machine system including the handle. Further, according to the present invention, it is possible to provide a work machine having an excellent detachable handle, a work machine to which the handle can be attached and detached, a vibration isolator for the handle, and a work machine system including the handle.

FIG. 1 is a plan view showing a grinder as a working machine having a handle according to the first embodiment of the handle, the working machine, the anti-vibration member, and the working machine system according to the present invention. FIG. 1 is a plan view showing the internal configuration by changing the mode of the handle and partially transmitting it. The front view which is the handle in Embodiment 1 and shows the state which integrated the grip part and the vibration-proof part. FIG. 3 is a plan sectional view taken along the line AA of FIG. Left side view of the handle. FIG. 5 is a front sectional view taken along the line CC of FIG. A plan sectional view of the anti-vibration part. A normal cross-sectional view of the anti-vibration part. The perspective view which shows the handle in the state which integrated the grip part and the anti-vibration part. An exploded perspective view of the handle. The perspective view which shows the state before injection molding an elastic body such as rubber in a vibration-proof part. The perspective view which shows the pin which is a component of the anti-vibration part. The perspective view which shows the cylinder part which becomes the mounted part of the vibration-proof part. The perspective view which shows the screw part which becomes the mounting part of the vibration-proof part. A plan sectional view showing a mold structure in which an elastic body such as rubber is insert-injected and molded together with a mounting portion and a mounted portion in a vibration-proof portion. FIG. 3 is a plan sectional view showing a vibration isolator according to a second embodiment of the present invention. An example of a grip portion that can be used in the working machine according to the present invention, (A) is a thick and long grip portion, and (B) is a plan sectional view showing a thin and short grip portion. FIG. 3 is a cross-sectional view of the handle according to the third embodiment of the present invention.

In the following, the same or equivalent components, members, etc. shown in the drawings are designated by the same reference numerals, and duplicate description thereof will be omitted as appropriate. The embodiment is not limited to the invention but is an example. Not all features and combinations thereof described in the embodiments are essential to the invention.

1 and 2 are plan views showing a grinder 1 as a working machine having a handle, a handle, a working machine, an anti-vibration member, and a working machine system according to the present invention. FIG. 2 is a partially transparent view in which the mode of the handle is changed from the state of FIG. The grinder 1 is a corded type grinder that operates with power supplied from an external AC power source, and the outer shell housing of the grinder 1 has a motor housing 2, a tail cover 3, and a gear case 4. The tail cover 3 is fixed to the rear end of the motor housing 2 by screwing or the like. The gear case 4 is fixed to the front end of the motor housing 2 by screwing or the like. The motor housing 2 and the tail cover 3 are, for example, resin molded bodies. The gear case 4 is made of metal such as aluminum.

A power cord 9 for connecting to an external AC power supply extends from the rear end portion of the tail cover 3. The motor housing 2 has a cylindrical shape such as a cylindrical shape that is integrally molded and extends in the front-rear direction, and the front end and the rear end are opened. As shown in FIG. 2, the motor housing 2 houses the motor 6 as a drive source. The axial direction of the motor 6 is the front-rear direction, that is, the longitudinal direction of the motor housing 2.

A deceleration mechanism (transmission mechanism) is housed in the internal space of the gear case 4, and the rotation of the output shaft 6a of the motor 6 is decelerated and the rotation shaft is converted by 90 degrees (in the vertical direction) to form a spindle (not shown). ). A grindstone 10 having a disk shape as a tip tool is attached and fixed to the spindle. The grindstone 10 is rotationally driven together with the spindle by the rotation of the motor 6. As the tip tool, in addition to a disc-shaped polishing grindstone and a cutting grindstone, a disc-shaped brush, a cutter, or the like can be attached.

FIG. 2 shows a state in which the anti-vibration portion 30 described later is removed from the handle 20 and the grip portion 21 is directly attached to the gear case 4. The outer shell housing (grinder 1) is formed by screwing (screwing and fixing) the male screw portion protruding from the mounting side end surface of the grip portion 21 to the mounting portion 7 formed on the outer shell housing (gear case 4) of the grinding machine. It is designed to be attached to.

Conventionally, it has been necessary to prepare two handles when it is desired to use the anti-vibration handle as shown in FIG. 1 and when it is desired to use the anti-vibration handle. In this way, the handle may require an elastic structure depending on the work, and the preferred handle specifications (length, thickness, vibration isolation performance, etc.) differ depending on the tool and type of work, so the operator. Needs to hold multiple handles of different types. Therefore, when holding a plurality of handles, they may be bulky or lost.

In the first embodiment of the present invention, the handle 20 is detachable from the grip portion 21 that can be gripped by the operator and the vibration damping portion 30 for vibration damping, so that the grip portion 21 and the vibration isolator can be attached and detached separately. By selecting the combination with the unit 30, it is possible to deal with various operations, and the above-mentioned problems can be solved.

Hereinafter, the handle 20 of the first embodiment will be described in detail. As shown in FIGS. 3 to 10, the handle 20 has a grip portion 21 (with a separate structure) and a vibration isolator portion 30 that are detachable from each other.

The grip portion 21 that can be gripped by an operator has a flange portion 21b formed on the mounting side of the main body portion 21a that serves as a grip portion, and a male screw portion as a grip portion mounting portion that protrudes from the mounting side end surface of the main body portion 21a. It has 21c integrally. The main body 21a is, for example, a resin molded product. The male screw portion 21c is, for example, a metal part, and most of it is embedded in the main body portion 21a. The portion of the male screw portion 21c protruding from the main body portion 21a has a structure that can be attached to the mounting portion 7. That is, the male screw portion 21c can be screwed (mounted) to the mounting portion 7.

The anti-vibration portion 30 that attenuates the vibration from the outer shell housing of the grinder 1 to the grip portion 21 includes a mounting portion 32 connected (mounted) to the mounting portion 7 formed in the outer shell housing (gear case 4) of the grinder. It has a tubular portion 35 of the mounted portion to which the grip portion 21 is connected (mounted), and an elastic body 31 such as rubber that is interposed between the mounting portion 32 and the tubular portion 35 to connect the two. In addition, when the grip portion 21 shown in FIG. 4 is connected to the elastic body 31 from the state before the grip portion 21 of FIG. 7 is connected, the elastic body 31 receives an axial pressing force by the flange portion 21b and is slightly pressed. The amount is compressed. That is, in the state of FIG. 4, the elastic body 31 shows a state of being compressed by the grip portion 21.

The mounting portion 32 has a flange portion 33 and a screw portion 34. The flange portion 33 is, for example, a resin molded product, and the screw portion 34 is, for example, a metal part. As shown in FIGS. 11 and 14, the extension portion (the portion partially embedded in the elastic body 31) on the base end side of the screw portion 34 is a cylindrical portion 34a, and the pin 36 is formed in the diameter direction of the cylindrical portion 34a. An insertion hole 34c is formed in the cylindrical portion 34a so that the cylinder portion 34a can pass through. A male screw portion 34b is formed on the tip end side of the screw portion 34, and the male screw portion 34b penetrates the central portion of the flange portion 33 located around the male screw portion 34b and protrudes from the flange portion 33. The portion of the male screw portion 34b protruding from the central portion of the flange portion 33 is screwed and connected to the female screw portion (not shown) formed in the mounting portion 7 on the outer shell housing side. The portion of the male threaded portion 34b protruding from the central portion of the flange portion 33 has the same shape as the male threaded portion 21c and has compatibility.

The tubular portion 35 of the mounted portion is, for example, a cylindrical metal part, and at least a part thereof is located on the inner peripheral side of the cylindrical portion 34a. As shown in FIGS. 11 and 13, a female screw portion 35a is engraved on the inner circumference of the tubular portion 35, and a through hole 35b through which the pin 36 of FIG. 12 can penetrate (for example, press-fitting is possible) is formed in the radial direction. Is formed in. The penetrating direction of the through hole 35b is a direction intersecting the grip axis X of the grip portion 21. The pin 36 is, for example, a metal part, and both ends of the pin 36 penetrating the through hole 35b project from the outer periphery of the tubular portion 35 and are inserted into the insertion hole 34c of the cylindrical portion 34a on the screw portion 34 side. The diameter of the insertion hole 34c is sufficiently larger than the diameter of the pin 36, and the pin 36 is engaged with the insertion hole 34c (engaged with sufficient play). By engaging with the insertion hole 34c, the pin 36 functions as a retaining member for restricting the movement of the tubular portion 35 in the grip axis X direction. The male screw portion 21c of the grip portion 21 can be screwed into the female screw portion 35a.

An elastic body 31 such as rubber that is interposed between the mounting portion 32 and the tubular portion 35 on the side to be mounted and connects the two is formed by insert injection molding. FIG. 15 shows a mold 40 for insert injection molding an elastic body 31 together with a mounting portion 32 and a mounted portion (cylinder portion 35, pin 36). The mold 40 has mold portions 41A and 41B forming the molding recess 45, a central mold portion 42, and a pressing mold portion 43 for pressing the mounting portion 32. The mold portions 41A and 41B can be brought into contact with and detached from the central mold portion 42.

In the state of FIG. 15, the elastic body 31 is interposed between the mounting portion 32 and the mounted portion (cylinder portion 35, pin 36) by injecting and cooling the molten raw material to be the elastic body 31 into the molded recess 45. Then, the mounting portion 32 and the mounted portion (cylinder portion 35, pin 36) are coupled and integrated to produce the vibration isolator portion 30. The outer circumference of the elastic body 31 is formed in a bellows shape so that the elastic body 31 is easily deformed. The pin 36 penetrates the through hole 35b of the tubular portion 35 in a direction intersecting the grip axis X of the grip portion 21, and is held by the elastic body 31 in a state of passing through the insertion hole 34c of the outer tubular member 34. The pin 36 acts as a retaining member for preventing the mounting portion 32 and the tubular portion 35 from coming off from the elastic body 31. The diameter of the insertion hole 34c is sufficiently larger than the diameter of the pin 36, and the pin 36 is held in a non-contact state with respect to the threaded portion 34. It is not necessary that the entire pin 36 is buried in the elastic body 31, and a part of the pin 36 may be exposed. To remove the vibration-proof portion 30 formed from the elastic body 31 from the mold 40, the mold portions 41A and 41B are separated from the central mold portion 42, and the central mold portion 42 is removed from the inner peripheral portion of the cylinder portion 35. This can be done by releasing the pressing of the pressing die portion 43 against the mounting portion 32.

When the grinder 1 as a working machine is used, the male screw portion 21c of the grip portion 21 is screwed and integrated with the female screw portion 35a of the vibration isolator portion 30 to form the handle 20, and the male screw portion 34b of the vibration isolator portion 30 is formed. Is screwed to the attachment portion 7 of the outer shell housing of the grinder 1 to form the grinder 1 to which the handle 20 is attached as shown in FIG. This makes it possible to realize a grinder 1 having a handle 20 having an anti-vibration function. Further, the male screw portion 21c of the grip portion 21 can be directly screwed to the mounting portion 7 of the outer shell housing, and the grip portion 21 can also be used as a handle having no vibration isolating portion.

According to this embodiment, the following effects can be obtained.

(1) The handle 20 that can be detachably connected to the grinding machine 1 as a working machine has a grip portion 21 and a vibration isolator portion 30 that can be separated from each other. Therefore, the grip portion 21 can be selectively attached to both the vibration isolator portion 30 and the attachment portion 7 of the grinder 1. If the grip portion 21 is attached to the grinder 1 via the vibration isolator portion 30, it can be used as a handle with an anti-vibration function. Further, if the grip portion 21 is directly attached to the grinder 1, it can be used as a handle without the anti-vibration function, and can be used for work that does not require the anti-vibration function. That is, it is possible to switch the presence or absence of the anti-vibration function with one handle (unit), and it is possible to improve cost performance and save space.

(2) By providing only the anti-vibration portion 30 alone as an anti-vibration member, it is possible to realize a handle with an anti-vibration function by attaching it to an existing handle without an anti-vibration function. In other words, the operator can divert the normal handle as a part of the vibration-proof handle if a vibration-proof member is separately prepared. For example, even with a conventional tool, the working machine of the present invention can be realized by combining the anti-vibration member of the present invention. Further, by marketing the anti-vibration member of the present invention at the same time as another gripping portion and another working machine, a providing system capable of realizing the working machine of the present invention is constructed by combining these. As a result, the worker can realize his / her favorite work machine.

(3) A wide range of work can be supported by replacing a plurality of types of vibration-proofing portions 30 having different vibration damping characteristics with respect to the gripping portion 21. Further, by making the existing various handles available as the grip portion, various combinations of the grip portion and the anti-vibration portion can be realized. Further, it is possible to reduce the types of molds required for manufacturing as compared with the case where a wide variety of handles with anti-vibration functions are individually manufactured.

(4) The anti-vibration portion 30 has a screw portion 34 on the mounting portion 31 side connected to the grinding machine 1 as a working machine, and a tubular portion 35 on the mounting portion side on which the grip portion 21 is mounted. Since the portion 34 can be screwed to the attachment portion 7 of the grinder 1 and the grip portion 21 can be screwed to the female screw portion 35a of the tubular portion 35, the vibration isolator portion 30 and the grip portion 21 can be easily attached and detached.

(5) The anti-vibration portion 30 has a structure in which an elastic body 31 is interposed between the mounting portion 31 and the mounted portion having the tubular portion 35, and both are connected to each other, and the anti-vibration portion 30 is an independent structure. It can be handled as a vibration-proof member.

(6) The mounted portion of the anti-vibration portion 30 is a tubular portion 35 having a through hole 35b penetrating in a direction intersecting the grip axis X of the grip portion 21, and at least a part of the elastic body 31 is passed through the through hole 35b. It has a pin 36 as a retaining member located inside the cylinder portion 35, and the movement of the tubular portion 35 in the grip axis X direction can be restricted by the pin 36. Along with this, it is possible to effectively prevent the tubular portion 35 from falling off from the elastic body 31.

FIG. 16 shows the vibration isolator 30A in the second embodiment of the present invention. In this case, the elastic body 31A such as rubber that is interposed between the mounting portion 32 and the tubular portion 35 to connect the two has no bellows shape on the outer periphery, and the vibration damping portion 30 in the first embodiment has a structure. The vibration damping characteristics are different from. Specifically, the elastic body 31A has a larger spring constant than the elastic body 31, and is excellent in attenuating high-frequency vibration as compared with the first embodiment. The other configurations are the same as those of the vibration isolator 30 in the first embodiment. By changing the shape and flexibility of the elastic body interposed between the mounting portion 32 and the tubular portion 35 in this way, a vibration-proof portion having various vibration damping characteristics can be obtained. The vibration-proof portion 30 of the present invention has a structure in which the male screw portion 34b and the female screw portion 35a can be screwed together. Therefore, the anti-vibration portions can be connected to each other. This makes it possible to deal with various types of vibration by connecting a plurality of vibration isolators. For example, by connecting the vibration isolator 30 of the first embodiment and the vibration isolator 30 of the second embodiment, the spring constant of the vibration isolator can be adjusted, and the range of work that can be applied is widened. ..

17A and 17B are examples of grip portions that can be used in the working machine according to the present invention, in which FIG. 17A is a thick and long grip portion 21A, and FIG. 17B is a thin and short grip portion 21B. As the gripping part to be connected to the vibration-proofing part described above, the thickness and length of the gripping part can be selected according to the application, such as the gripping part 21A or the gripping part 21B. It becomes possible to provide a handle.

FIG. 18 is a cross-sectional view of the handle 20 according to the third embodiment of the present invention. The handle 20 in the third embodiment differs from the configuration of the first embodiment in that it has a female screw portion 21d, and is otherwise consistent. Therefore, the description of points other than the female screw portion 21d will be omitted. The handle 20 according to the third embodiment is provided with a female screw portion 21d having a female screw structure similar to that of the female screw portion 35a on the opposite side (anti-vibration isolation portion 30 side) of the male screw portion 21c. With the handle 20 in the third embodiment, for example, when the anti-vibration portion 30 is not required, the female screw portion 21d can hold the anti-vibration portion 30 and prevent the anti-vibration portion 30 from being lost. can do. Further, since another grip portion can be attached to the female screw portion 21d, the grip portion can be extended. As described above, by providing the female screw portion not only on the vibration-proof portion but also on the grip portion, the workability can be further improved.

Although the present invention has been described above by taking the embodiment as an example, it is understood by those skilled in the art that various modifications can be made to each component and each processing process of the embodiment within the scope of the claims. By the way. Hereinafter, a modification example will be touched upon.

In the anti-vibration portion of each embodiment of the present invention, the through hole provided in the cylinder portion 35 on the mounted portion side has an inner diameter sufficiently larger than that of the pin 36 as a retaining member, and the pin 36 is provided with respect to the cylinder portion 35. It may be configured to be held by the elastic body 31 in a non-contact state.

Instead of providing the pin 36 as a retaining member, an unevenness may be formed on the outer periphery of the tubular portion 35 to prevent the elastic body 31 from being retracted.

In each embodiment of the present invention, the grinding machine is exemplified as a working machine, but the present invention can be applied to various working machines having handles such as a hammer drill, an impact wrench, a screw driver, a chainsaw, and a hedge trimmer in addition to the grinding machine. ..

1 grinder, 2 motor housing, 3 tail cover, 4 gear case,
6 motor, 7 mounting part, 10 grindstone, 20, 40 handle, 21 grip part,
30,30A anti-vibration part, 31,31A elastic body, 32 mounting part, 33 collar part,
34 threaded part, 34a cylindrical part, 34b male threaded part, 34c insertion hole, 35 cylinder part,
35a female thread, 35b through hole, 36 pin, 40 mold

Claims (13)

The tip tool can be attached to a work machine that can be driven by the drive source.
It has a grip portion that can be gripped by an operator and a vibration isolator that attenuates vibration from the work machine to the grip portion.
A handle to which the grip portion can be attached to and detached from the vibration isolator portion. The handle according to claim 1, wherein the grip portion can be selectively attached to both the vibration isolator portion and the working machine. The anti-vibration portion is provided with a mounting portion and a mounted portion.
The grip portion is provided with a grip portion mounting portion.
The mounting portion and the gripping portion mounting portion are mountable to a predetermined mounting portion in a working machine, and the gripping portion mounting portion can be mounted to the mounted portion, according to claim 1 or 2. handle. The handle according to claim 3, wherein an elastic body is interposed between the mounting portion and the mounted portion. The mounted portion includes a tubular portion having a through hole penetrating in a direction intersecting the grip axis of the grip portion, and a retaining member whose at least a part is located inside the elastic body through the through hole. Have and
The handle according to claim 3 or 4, wherein the retaining member restricts the movement of the tubular portion in the grip axis direction. The handle according to any one of claims 3 to 5, wherein the mounting portion has a screw portion screwed into the working machine and a flange portion located around the screw portion. The handle according to claim 6, wherein an insertion hole through which a part of the retaining member passing through the through hole is inserted is formed in the screw portion. The handle according to claim 7, wherein the retaining member is held in a non-contact state with at least one of the screw portion and the cylinder portion. The handle according to any one of claims 1 to 8, wherein at least one of the anti-vibration portion and the grip portion can be selectively selected from a plurality of types. A working machine having the handle according to any one of claims 1 to 9, and a mounting portion to which the grip portion and the vibration isolator portion of the handle can be selectively attached. A housing that houses the drive source and
The tip tool driven by the drive source and
It has a handle that is detachably connected to the housing.
The handle is a working machine having a vibration-proof portion and a grip portion connected to the housing via the vibration-proof portion and detachable from the vibration-proof portion. A vibration-proof member for handles that can be attached to work equipment.
The mounting part connected to the work machine and
The mounted part to which the gripping part that can be gripped by the operator is mounted, and the mounted part
A vibration-proof member having an elastic body interposed between the mounting portion and the mounted portion. A work machine with a mounting part and
A grip portion that can be attached to the mounting portion and
It has a vibration-proof member that can be attached to the attachment portion instead of the grip portion.
A working machine system in which the grip portion can be attached to the anti-vibration member.

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