JP3226313U - Core runout suppression parts and power tools - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a core runout suppressing component and an electric tool capable of suppressing core runout of an insert insertion tool while realizing smooth rotation of the insert insertion tool. A core runout suppressing component (40) according to an embodiment is detachably formed on a tool body (20) of an electric power tool (10), and a cylindrical insert insertion that is rotated by the electric power tool (10) while being attached to the tool body (20). A cylindrical body 41 through which the tool 30 passes, an annular bearing 42 provided on the cylindrical body 41 and through which the insert insertion tool 30 penetrates, and an annular shape through which the insert insertion tool 30 penetrates provided on the inner peripheral surface of the bearing 42. Of the resin member 43, and the resin member 43 is insert-inserted in a direction in which the inner peripheral surface of the resin member 43 contacts the outer peripheral surface of the insert insertion tool 30 on the distal end side and intersects the extending direction of the insert insertion tool 30. Limit the movement of the tool 30. [Selection diagram] Figure 1

Description

The present invention relates to a runout suppressing component and an electric tool.

Usually, when a hard female screw is required, such as when durability of the female screw is required or when strong tightening is required, for example, an insert called a coil insert or a screw insert is used. The insert is formed by winding a wire material such as stainless steel into a coil, and is inserted (embedded) by being screwed into a tap hole (screw hole) of a workpiece such as resin or aluminum alloy by an insert insertion tool. .. As the insert, there are an insert with a tongue and a tongueless insert, and an insert insertion tool corresponding to each is used.

Such an insert insertion tool is used by being attached to an electric power tool (for example, an electric screwdriver). However, the processing accuracy and assembly accuracy of the components that make up the electric power tool, and the holding structure that holds the insert insertion tool, etc. may affect the runout of the insert insertion tool that is rotated by the electric power tool. is there. When the runout of the insert insertion tool occurs, it becomes difficult to insert the insert into the tap hole by the insert insertion tool, and it takes time to insert the insert. Therefore, it is required to suppress the runout of the insert insertion tool while realizing the smooth rotation of the insert insertion tool.

JP, 2009-291860, A

The problem to be solved by the present invention is to provide a core runout suppressing component and an electric tool capable of suppressing core runout of an insert insertion tool while realizing smooth rotation of the insert insertion tool.

A first runout suppressing component according to an embodiment of the present invention is detachably formed on a tool body of an electric power tool, and has a cylindrical insert insertion tool that is rotated by the electric power tool when mounted on the tool body. And a cylindrical body through which the insert insertion tool penetrates, provided on the cylindrical body, and an annular resin member provided on the inner peripheral surface of the bearing and through which the insert insertion tool penetrates The resin member, the inner peripheral surface of the resin member is in contact with the outer peripheral surface of the tip side of the insert insertion tool, the movement of the insert insertion tool in a direction intersecting the extending direction of the insert insertion tool. Characterized by limiting.

A second runout suppressing component according to an embodiment of the present invention is detachably formed on a tool body of an electric power tool, and has a cylindrical insert insertion tool that is rotated by the electric power tool when mounted on the tool body. A cylindrical body through which the insert insertion tool penetrates, and a cylindrical body through which the insert insertion tool passes, wherein the bearing has an inner peripheral surface of the bearing and an outer peripheral surface on the tip side of the insert insertion tool. And restricting movement of the insert insertion tool in a direction intersecting the extending direction of the insert insertion tool.

In the first runout suppressing component, the insert insertion tool has an annular convex portion on an outer peripheral surface thereof, and the resin member is configured to operate when the tubular body is mounted on the electric power tool. It may be formed so as to come into contact with the convex portion of the insert insertion tool mounted on the tool to be deformed so as to get over the convex portion.

An electric power tool according to an embodiment of the present invention includes a tool body, a cylindrical insert insertion tool attached to the tool body, a driving unit for rotating the insert insertion tool, and the above-described embodiment of the present invention. The first or second core runout suppressing component according to the first aspect is provided.

According to the present invention, it is possible to suppress the runout of the insert insertion tool while realizing the smooth rotation of the insert insertion tool.

It is a figure which shows schematic structure of the electric tool which concerns on 1st Embodiment. It is an explanatory view for explaining a bearing and a resin member with which the runout suppressing component according to the first embodiment is provided. It is explanatory drawing for demonstrating the bearing with which the core run-out suppression component which concerns on 2nd Embodiment is equipped.

<First Embodiment>
A first embodiment will be described with reference to FIGS. 1 and 2. The up, down, left and right directions in the first embodiment are based on the drawings.

(Basic configuration)
As shown in FIG. 1, the electric power tool 10 according to the first embodiment includes a tool body 20, an insert insertion tool 30, and a runout suppressing component 40.

The tool body 20 is formed so that the insert insertion tool 30 can be detachably held by a holding mechanism (not shown) such as a chuck. A drive unit 21 is provided inside the tool body 20. The drive unit 21 rotates the insert insertion tool 30 with the central axis of the insert insertion tool 30 as the center of rotation. The drive unit 21 has, for example, a motor, a coupling mechanism (neither is shown), etc., and a user such as an operator can switch a switch (not shown) or press the switch. Drive accordingly.

The insert insertion tool 30 has a housing 31, a mandrel (manddle) 32, and a fixing member 33. The insert insertion tool 30 is used for inserting (embedding) a tongue insert or a tongue insert into a tap hole of a workpiece.

The housing 31 is formed in a cylindrical shape (tube shape). The diameter below the center of the housing 31 is smaller than the diameter above the center of the housing 31. A mandrel 32 is provided by being inserted into the housing 31. A contact member 31 a is provided at the lower end of the housing 31. The contact member 31a is formed in an annular shape and contacts the surface of the workpiece when the insert is embedded in the tap hole of the workpiece. The contact member 31a is made of resin, for example, and functions as a cushioning material. A female screw (not shown) is formed on the inner peripheral surface of the housing 31 from the vicinity of the center of the housing 31 to the upper end.

The mandrel 32 has a cylindrical shape. On the outer peripheral surface of the mandrel 32, a male screw 32a is formed from near the center of the mandrel 32 to near the upper end of the mandrel 32. The male screw 32a is combined with the above-mentioned female screw formed on the inner peripheral surface of the housing 31, and the mandrel 32 is integrally held in the housing 31. A male screw 32b is formed on the outer peripheral surface of the mandrel 32 on the lower end side (tip side). An insert (not shown) is combined with the male screw 32b, and the insert is attached to the mandrel 32. The upper end of the mandrel 32 is formed in the shape of a hexagonal bit (not shown), and the hexagonal bit portion is attached to the lower end of the tool body 20 (the tip of the tool body 20). When the insert insertion tool 30 is an insertion tool for a tongueless insert, the mandrel 32 is provided with various members such as a pawl (not shown) having hook portions (claws).

The fixing member 33 is formed so as to be attachable to the male screw 32 a on the outer peripheral surface of the mandrel 32. That is, female screws (not shown) are formed on the inner peripheral surface of the fixing member 33 from the lower end to the upper end of the fixing member 33. The fixing member 33 fixes the position of the housing 31 to the mandrel 32 by being combined with the male screw 32a on the outer peripheral surface of the mandrel 32 and abutting on the upper end of the housing 31. As the fixing member 33, for example, a lock nut or the like is used.

The runout suppressing component 40 includes a tubular body 41, a bearing (bearing) 42, and a resin member 43. The core runout suppressing component 40 is such that the insert insertion tool 30 moves in a direction intersecting the extending direction of the insert inserting tool 30 (for example, a direction orthogonal thereto), that is, in a direction intersecting the extending direction of the insert inserting tool 30. It is used to limit the movement of the insert insertion tool 30.

The tubular body 41 is formed, for example, in a cylindrical shape (tubular shape), and is detachably provided on the lower end portion of the tool body 20. The inner diameter of the cylindrical body 41 is almost the same as the outer diameter of the tool body 20. The upper end of the tubular body 41 is fitted to the lower end of the tool body 20, and the tubular body 41 is fixed to the lower end of the tool body 20 by a fixing member 41a such as a screw. The cylindrical body 41 is mounted on the lower end of the tool body 20, and the insert insertion tool 30 mounted on the lower end of the tool body 20 passes through the internal space of the cylindrical body 41. Although the insert insertion tool 30 is built in the cylinder 41, the lower end of the insert insertion tool 30, that is, the tip of the insert insertion tool 30 (abutting member 31a, male screw 32b, etc.) is exposed from the cylinder 41. To do.

As shown in FIGS. 1 and 2, the bearing 42 is formed in an annular shape, is provided at the lower end of the inner peripheral surface of the tubular body 41, and has the insert insertion tool 30 that is rotated by the drive unit 21 of the tool body 20. It penetrates through the center of the bearing 42 (passes through the through hole of the bearing 42). The bearing 42 allows the insert insertion tool 30 to rotate smoothly. Specifically, the bearing 42 has an annular inner ring, an annular outer ring and a plurality of balls (none of which are shown), and each ball is provided between the inner ring and the outer ring. The inner ring holds the resin member 43, and the outer ring is fixed to the tubular body 41.

As shown in FIGS. 1 and 2, the resin member 43 is formed in an annular shape, is provided on the inner peripheral surface of the bearing 42, and the insert insertion tool 30 rotated by the drive unit 21 of the tool body 20 is a resin member. It penetrates through the center of 43 (passes through the through hole of the resin member 43). In this resin member 43, the inner peripheral surface of the annular resin member 43 contacts the outer peripheral surface on the lower end side (tip end side) of the insert insertion tool 30 and intersects with the extending direction of the insert insertion tool 30 (for example, orthogonal to each other). The movement of the insert insertion tool 30 in the direction). One round of the inner peripheral surface of the annular resin member 43 is in close contact with one round of the outer peripheral surface of the insert insertion tool 30 on the lower end side. The outer peripheral surface on the lower end side of the insert insertion tool 30 is an outer peripheral surface located on the lower end side with respect to the center of the insert insertion tool 30 in the extending direction.

Here, the insert insertion tool 30 includes a contact member 31a having a diameter larger than a diameter of a portion of the core runout suppressing component 40 that contacts the inner peripheral surface of the resin member 43. That is, the insert insertion tool 30 has an annular convex portion (contact member 31a) on the outer peripheral surface of the insert insertion tool 30. The insert insertion tool 30 is attached to the tool body 20 before the core runout suppressing component 40 is attached to the tool body 20. Therefore, when the runout suppressing component 40 is mounted on the tool main body 20, the resin member 43 abuts and deforms the convex portion of the insert insertion tool 30 mounted on the tool main body 20, and overcomes the convex portion. Further, it is formed so as to contact the outer peripheral surface of the insert insertion tool 30. For example, the resin member 43 is formed such that its elasticity and size are adjusted so as to realize the above-mentioned operation. However, the resin member 43 has a hardness that can limit the movement of the insert insertion tool 30 in a direction intersecting the extending direction of the insert insertion tool 30.

(Insert insertion operation)
Next, the insert insertion operation using the insert insertion tool 30 described above will be described. The insert is formed by winding a wire material having a rhombic cross section (for example, stainless steel) in a coil shape. The outer peripheral surface of the insert functions as an outer thread, and the inner peripheral surface of the insert functions as an inner thread. A tongue bent in the diametrical direction of the coil is formed at one end of the tongue insert. A cutout is formed at one end of the tongue insert.

As a pre-stage of inserting such an insert into the tap hole, first, the upper end portion (hexagonal bit) of the mandrel 32 of the insert insertion tool 30 is attached to the lower end portion of the tool body 20 by the user, and then the runout suppressing component 40. The upper end of the cylindrical body 41 is attached to the lower end of the tool body 20. At this time, the insert insertion tool 30 attached to the lower end of the tool body 20 is passed through the through hole of the resin member 43 of the runout suppressing component 40. The insert is then mounted by the user on the mandrel 32 of the insert insertion tool 30. For example, the user holds the electric power tool 10, inserts the insert into the male screw 32b of the mandrel 32 of the insert insertion tool 30 attached to the electric power tool 10, and attaches the insert to the tip portion of the insert insertion tool 30.

The user who holds the electric power tool 10 positions the electric power tool 10 so that the insert mounted on the tip end portion of the insert insertion tool 30 is located immediately above the tapped hole. When the power tool 10 is driven by the user in this state, the insert insertion tool 30 is automatically rotated by the drive unit 21 of the power tool 10. Then, the power tool 10 is gradually lowered by the user, and the insert attached to the tip end portion of the rotating insert insertion tool 30 is screwed and inserted (embedded) into the tap hole. When the lower surface of the contact member 31a of the insert insertion tool 30 contacts the surface of the workpiece and the insert insertion tool 30 stops rotating (for example, when the drive unit 21 detects a predetermined torque due to resistance), the insert insertion tool 30 is It automatically rotates in the opposite direction to when the insert is inserted. As a result, the tip end portion of the insert insertion tool 30 is removed from the insert embedded in the tap hole, and the electric tool 10 is pulled upward by the user.

In such an insert inserting operation, the insert inserting tool 30 is rotated by the electric tool 10. The inner peripheral surface of the annular resin member 43 is in contact with the outer peripheral surface of the lower end side (tip side) of the insert insertion tool 30, and when the insert insertion tool 30 rotates, the resin member 43 held by the bearing 42 is inserted into the insert member. Rotate with the insertion tool 30. The resin member 43 is held together with the bearing 42 by the cylindrical body 41 attached to the tool body 20, and inserts in a direction intersecting the extending direction of the insert insertion tool 30 (for example, the rotation axis of the insert insertion tool 30). Limit the movement of the tool 30. As a result, the runout of the insert insertion tool 30 can be suppressed (or eliminated). Further, since the resin member 43 that contacts the outer peripheral surface of the insert insertion tool 30 rotates together with the insert insertion tool 30 by the bearing 42, smooth rotation of the insert insertion tool 30 can be realized. Therefore, it is possible to suppress the runout of the insert insertion tool 30 while realizing the smooth rotation of the insert insertion tool 30.

As described above, according to the first embodiment, the inner peripheral surface of the annular resin member 43 comes into contact with the outer peripheral surface of the lower end side (tip end side) of the insert insertion tool 30, and the insert insertion tool 30 extends. Since the movement of the insert insertion tool 30 in the direction intersecting the direction (for example, the direction orthogonal to the direction) is limited, the runout of the insert insertion tool 30 can be suppressed. Further, since the resin member 43 that contacts the outer peripheral surface of the insert insertion tool 30 rotates together with the insert insertion tool 30 by the bearing 42, smooth rotation of the insert insertion tool 30 can be realized. Therefore, it is possible to suppress the runout of the insert insertion tool 30 while realizing the smooth rotation of the insert insertion tool 30.

<Second Embodiment>
The second embodiment will be described with reference to FIG. The up, down, left and right directions in the second embodiment are based on the drawings. In the second embodiment, differences from the first embodiment will be described, and other description will be omitted.

In the second embodiment, as shown in FIG. 3, only the bearing 42 is provided. That is, the resin member 43 does not exist as compared with the first embodiment (see FIG. 2). In the bearing 42, the inner peripheral surface of the bearing 42 contacts the outer peripheral surface on the lower end side (tip side) of the insert insertion tool 30, and the insert insertion is performed in a direction intersecting the extending direction of the insert insertion tool 30 (for example, a direction orthogonal to each other). Limit the movement of the tool 30. One circumference of the inner peripheral surface of the annular bearing 42 is in close contact with one circumference of the outer peripheral surface of the insert insertion tool 30 on the lower end side.

Here, the insert insertion tool 30 has an annular convex portion (contact member 31a) on the outer peripheral surface of the insert insertion tool 30 as in the first embodiment. Therefore, the contact member 31a of the insert insertion tool 30 mounted on the tool body 20 contacts the bearing 42 located at the lower end of the tubular body 41 when the runout suppressing component 40 is mounted on the tool body 20. It is formed so that it can be deformed and pass through the through hole of the bearing 42. For example, the contact member 31a is formed such that its elasticity and size are adjusted so as to realize the above-described operation.

According to such a configuration, the inner peripheral surface of the annular bearing 42 is in contact with the outer peripheral surface on the lower end side (tip side) of the insert insertion tool 30, and when the insert insertion tool 30 rotates, the inner ring of the bearing 42 is rotated. Rotates with the insert insertion tool 30. The bearing 42 is held by the tubular body 41 attached to the tool body 20, and restricts the movement of the insert insertion tool 30 in the direction intersecting the extending direction of the insert insertion tool 30. As a result, the runout of the insert insertion tool 30 can be suppressed (or eliminated). Moreover, since the inner ring of the bearing 42 which contacts the outer peripheral surface of the insert insertion tool 30 rotates together with the insert insertion tool 30, the insert insertion tool 30 can be smoothly rotated. Therefore, it is possible to suppress the runout of the insert insertion tool 30 while realizing the smooth rotation of the insert insertion tool 30.

As described above, according to the second embodiment, the same effect as that of the first embodiment can be obtained. That is, the inner peripheral surface of the annular bearing 42 contacts the outer peripheral surface on the tip side of the insert insertion tool 30, and the insert insertion tool 30 in the direction intersecting the extending direction of the insert insertion tool 30 (for example, the orthogonal direction). Since the movement is restricted, the runout of the insert insertion tool can be suppressed. Moreover, since the inner ring of the bearing 42 which contacts the outer peripheral surface of the insert insertion tool 30 rotates together with the insert insertion tool 30, the insert insertion tool 30 can be smoothly rotated. Therefore, it is possible to suppress the runout of the insert insertion tool 30 while realizing the smooth rotation of the insert insertion tool 30.

<Other Embodiments>
In the above description, as the insert, the insert with a tongue and the tongueless insert are exemplified, but the insert is not limited to this, and, for example, in addition to the insert with the tongue and the tongueless insert, there is an insert, which is a screw-in type insert (registered. Trademarks) and Enzato which are self-cutting inserts also exist, and insert insert tools corresponding to them may be used. That is, it is possible to use an insert insertion tool corresponding to various inserts.

Further, in the above description, it is not considered to reduce the weight of the cylinder body 41 of the runout suppressing component 40, but the invention is not limited to this, and the weight of the cylinder body 41 of the runout suppressing component 40 is reduced. Alternatively, one or a plurality of through holes may be formed in the tubular body 41.

Although the above-described embodiment according to the present invention has been described above, the above-described embodiment is merely an example and does not limit the scope of the invention. The above-described embodiments can be modified in various ways. For example, the constituent elements shown in the above-described embodiments may be omitted, replaced, or modified, and constituent elements according to different embodiments may be appropriately combined. The above-described embodiment and its modifications are included in the scope of the invention described in the claims and its equivalent scope.

DESCRIPTION OF SYMBOLS 10 Electric tool 20 Tool body 21 Drive part 30 Insert insertion tool 31 Housing 31a Contact member 32 Mandrel 32a Male screw 32b Male screw 33 Fixing member 40 Core runout suppression component 41 Cylindrical body 41a Fixing member 42 Bearing 43 Resin member

Claims (4)

A cylindrical body that is detachably formed in the tool body of the electric tool and is attached to the tool body, and through which the cylindrical insert insertion tool that rotates by the electric tool passes.
An annular bearing provided on the cylindrical body and through which the insert insertion tool penetrates,
An annular resin member provided on the inner peripheral surface of the bearing and through which the insert insertion tool penetrates,
Equipped with
The resin member limits movement of the insert insertion tool in a direction intersecting an inner peripheral surface of the resin member with a distal end outer peripheral surface of the insert insertion tool and intersecting a stretching direction of the insert insertion tool. A runout suppressing component characterized by. A cylindrical body that is detachably formed in the tool body of the electric tool and is attached to the tool body, and through which the cylindrical insert insertion tool that rotates by the electric tool passes.
An annular bearing provided on the cylindrical body and through which the insert insertion tool penetrates,
Equipped with
The bearing is configured such that an inner peripheral surface of the bearing contacts an outer peripheral surface on a tip side of the insert insertion tool and restricts movement of the insert insertion tool in a direction intersecting a stretching direction of the insert insertion tool. A core runout suppressing component. The insert insertion tool has an annular convex portion on the outer peripheral surface,
When the tubular body is mounted on the electric power tool, the resin member is formed so as to come into contact with and deform the convex portion of the insert insertion tool mounted on the electric power tool, and to overcome the convex portion. The core runout suppressing component according to claim 1, wherein: Tool body,
A cylindrical insert insertion tool mounted on the tool body,
A drive unit for rotating the insert insertion tool,
A core runout suppressing component according to any one of claims 1 to 3,
An electric tool comprising:

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