Motion conversion adapter and polishing tool using the same

Abstract

To provide a motion conversion adapter that eliminates the need of such as a cable, be easily carried, is compact, has excellent workability and usability, and can contribute to provision of a polishing tool, and to provide a polishing tool.SOLUTION: A motion conversion adapter 11 includes: a casing 11A; an input shaft 12 fitted inside the casing 11A so as to be rotatable while a connection part 12a protrudes from one end inside the casing 11A; an output shaft 13 fitted inside the casing 11A so as to be freely movable in an axial direction while a connection part 13a protrudes from the other end inside the casing 11A; a motion conversion clutch mechanism part 15 installed between the input shaft 12 and the output shaft 13 inside the casing 11A to convert a rotational motion of the input shaft 12 into a motion of moving the output shaft 13 in an axial direction; and a spring 16 for biasing the output shaft 13 on a side of the input shaft 12 via the motion conversion clutch mechanism part 15 and holding the motion conversion clutch mechanism part 15 in a motion coupling state.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a motion converting adapter and a grinding tool using the same. [Background technology]

[0002] BACKGROUND ART Grinding tools have been known as tools used to remove slag after welding, paint films, and rust (see, for example, Patent Document 1).

[0003] Conventional grinding tools use high-pressure air as a driving force, which reciprocates the piston of the driving tool. A bundle of needles is attached to the tip of the piston. The needles attached to the tip of the piston are then reciprocated along the axis (front and back) with the piston, striking the surface of the workpiece with this reciprocating movement. The striking of the needles is used to remove spatter adhering to the surface, such as that caused by welding, as well as to roughen the surface, remove paint and rust, and remove shells from ship hulls. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. 2018 / 180832 Summary of the Invention [Problem to be solved by the invention]

[0005] The above-mentioned conventional grinding tools are driven by high-pressure air, so an air compressor must be prepared and carried along with the compressor, which is inconvenient and requires the running of an air cable with a larger diameter than the diameter of an electric cable, etc., resulting in problems of poor workability.

[0006] Therefore, a technical problem has arisen that must be solved in order to provide a motion conversion adapter and a grinding tool that can contribute to the realization of a grinding tool that does not require cables or the like, is easy to carry, is compact, has good workability, and is easy to use, and the present invention aims to solve this problem. [Means for solving the problem]

[0007] The present invention has been proposed to achieve the above-mentioned object, and the invention described in claim 1 provides a motion conversion adapter that can be attached to an output part of a driving tool whose output part rotates, comprising: a casing; an input shaft having an input connecting part that can be attached to the output part protruding from one end of the casing and rotatably attached within the casing; an output shaft having an output connecting part that can be attached to a tool tip protruding from the other end of the casing and attached within the casing so as to be movable axially; a motion conversion clutch mechanism that is provided between the input shaft and the output shaft within the casing and converts the rotational motion of the input shaft into motion that moves the output shaft in the axial direction; and a spring that urges the output shaft toward the input shaft via the motion conversion clutch mechanism and maintains the motion conversion clutch mechanism in a power-connected state.

[0008] According to this configuration, the input connector can be attached to an easily portable driving tool, and the driving tool can be used as a driving source, making it easy to carry.

[0009] A second aspect of the present invention provides a motion conversion adapter having the configuration of the first aspect, further comprising a chuck portion for attaching a tool tip to the output connecting portion.

[0010] According to this configuration, by attaching the tool bit to the chuck portion of the output connecting portion of the output shaft, work according to the type of tool bit can be easily performed.

[0011] A third aspect of the present invention provides a motion conversion adapter according to the second aspect, wherein the tool tip has a plurality of needle members.

[0012] According to this configuration, by attaching multiple needle materials as tip tools and striking the needle materials against the surface of the workpiece, it is possible to easily perform tasks such as removing spatter that adheres to the surface resulting from welding processes, roughening the surface, removing paint and rust, and removing shells from the hull of a ship.

[0013] A fourth aspect of the present invention provides the motion conversion adapter of the first aspect, wherein the driving tool is an electric screwdriver.

[0014] According to this configuration, an electric screwdriver is used as the driving tool, and if an electric screwdriver using a storage battery is used, it is possible to realize a grinding tool that is easy to carry without requiring a cable or the like, is compact, has good workability, and is easy to use.

[0015] The invention described in claim 5 provides a grinding tool that can be attached to a driving tool with a rotating output part, comprising a motion conversion adapter, a chuck part, and a plurality of needle materials, wherein the motion conversion adapter has a casing, an input shaft rotatably attached within the casing with an input connecting part attached to the output part protruding from one end of the casing, an output shaft arranged within the casing so that it can move axially with its output connecting part protruding from the other end of the casing, a motion conversion clutch mechanism part provided between the input shaft and the output shaft within the casing and converting the rotational motion of the input shaft into motion of the output shaft moving axially, and a spring that urges the output shaft toward the input shaft via the motion conversion clutch mechanism part and holds the motion conversion clutch mechanism part in a power connected state, wherein the chuck part is attached to the output connecting part outside the casing, and the needle materials are extended in the axial direction of the output shaft and are replaceably attached to the chuck part.

[0016] According to this configuration, the input connector can be attached to an easily portable driving tool, such as an electric motor, and the driving tool can be used as a driving source, making it easy to carry.

[0017] A sixth aspect of the present invention provides the grinding tool according to the fifth aspect, wherein the driving tool is an electric screwdriver.

[0018] According to this configuration, an electric screwdriver is used as the driving tool, and if an electric screwdriver using a storage battery is used, it is possible to realize a grinding tool that is easy to carry without requiring a cable or the like, is compact, has good workability, and is easy to use. [Effects of the Invention]

[0019] According to the present invention, the input connector can be attached to an easily portable driving tool, such as an electric motor, and the driving tool can be used as a driving source, making it easy to carry. [Brief explanation of the drawings]

[0020] [Figure 1] 1A and 1B show a grinding tool as an example according to an embodiment of the present invention attached to a power tool, in which FIG. 1A is a side view and FIG. 1B is a perspective view. [Figure 2] FIG. [Figure 3] FIG. 3 is a left side view of the grinding tool shown in FIG. 2. [Figure 4] FIG. 3 is a right side view of the grinding tool shown in FIG. 2. [Figure 5] FIG. 3 is a cross-sectional view taken along line AA in FIG. 2, with some parts omitted. [Figure 6] 3 is an enlarged perspective view schematically showing a first clutch and a second clutch in the grinding tool shown in FIG. 2. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0021] In order to achieve the object of the present invention to provide a motion conversion adapter and a grinding tool that can contribute to the realization of a grinding tool that does not require a cable or the like, is easy to carry, is compact, has good workability, and is easy to use, the present invention has been realized by providing a motion conversion adapter to be attached to the output part of a driving tool whose output part rotates, comprising: a casing; an input shaft having an input connecting part attached to the output part protruding from one end of the casing and rotatably mounted within the casing; an output shaft having an output connecting part protruding from the other end of the casing and mounted within the casing so as to be freely movable in the axial direction; a motion conversion clutch mechanism provided between the input shaft and the output shaft within the casing, which converts the rotational motion of the input shaft into motion that moves the output shaft in the axial direction; and a spring that urges the output shaft toward the input shaft via the motion conversion clutch mechanism, maintaining the motion conversion clutch mechanism in a power-coupled state. [Example]

[0022] An embodiment of the present invention will be described in detail below with reference to the accompanying drawings. In the following embodiment, when the number, numerical value, amount, range, etc. of components are mentioned, the number is not limited to the specific number, and may be more or less than the specific number, unless otherwise specified or when it is clearly limited to a specific number in principle.

[0023] Furthermore, when referring to the shape or positional relationship of components, etc., it includes things that are substantially similar or approximate to those shapes, etc., unless otherwise specified or when it is clearly considered otherwise in principle.

[0024] In addition, the drawings may exaggerate characteristic parts to make the features easier to understand, and the dimensional proportions of the components may not be the same as in reality. In addition, in cross-sectional views, hatching of some components may be omitted to make the cross-sectional structure of the components easier to understand.

[0025] In the following description, expressions indicating directions such as up / down and left / right are not absolute, but are appropriate when each part of the grinding tool of the present invention is in the position shown, but if the position changes, they should be interpreted accordingly. Furthermore, the same elements are denoted by the same reference numerals throughout the description of the embodiments.

[0026] Fig. 1 shows a grinding tool according to the present invention attached to a power tool, (a) is an overall side view thereof, and (b) is an overall perspective view thereof. Figs. 2 to 5 show the grinding tool with a needle material attached, (b) is a plan view thereof, (c) is a left side view thereof, (d) is a right side view thereof, and (e) is a cross-sectional view taken along line AA of Fig. 2, with some parts omitted.

[0027] 1 to 5, a grinding tool 10 is used by being attached to an electric screwdriver 50, which is a driving tool, as shown in FIG.

[0028] The electric screwdriver 50 has a driver chuck portion 51 that is attached to an input connecting portion 12 a of an input shaft 12 (described later) of the grinding tool 10 and that serves as an output portion that rotates together with the input shaft 12 .

[0029] The grinding tool 10 includes a motion converting adapter 11 and a needle material 53, which is a tip tool, attached to the motion converting adapter 11 via a chuck portion 14.

[0030] The motion conversion adapter 11 has a casing 11A, an input shaft 12 having an input coupling portion 12a protruding from one end (rear end) of the casing 11A and attached to a driver chuck portion 51 of an electric screwdriver 50, and an output shaft 13 having an output coupling portion 13a protruding from the other end (tip end) of the casing 11A and having a chuck portion 14 attached to the output coupling portion 13a for attaching a tool tip. The motion conversion adapter 11 also has a motion conversion clutch mechanism 15 between the input shaft 12 and the output shaft 13 that converts the rotational motion of the input shaft 12 into motion of the output shaft 13 moving in the axial direction (front-to-rear direction), and a spring 16 between the inner surface 11a at the other end of the casing 11A and the output shaft 13 that biases the output shaft 13 toward the input shaft 12 via the motion conversion clutch mechanism 15.

[0031] The motion converting clutch mechanism 15 has a drive-side clutch 17 at each of the opposing ends of the input shaft 12 and the output shaft 13, i.e., at the end on the input shaft 12 side, and a driven-side clutch 18 at the end on the output shaft 13 side. The motion converting clutch mechanism 15 also has a clutch pin 19 between the drive-side clutch 17 and the driven-side clutch 18, connecting them so that they can rotate relatively and slide axially. The drive-side clutch 17 and the driven-side clutch 18 have pin retaining holes 17a, 18a drilled in the axial direction in their end faces, respectively, and the clutch pins 19 are inserted into the pin retaining holes 17a and 18a.

[0032] 5 and 6, the drive-side clutch 17 and the driven-side clutch 18 have a plurality of cam portions 17A on the drive side and a plurality of follower portions 18A on the driven side that mesh with each other on end faces that face each other in the axial direction. The cam portions 17A and the follower portions 18A have approximately the same shape and are provided at a plurality of locations (three locations in this embodiment) at regular intervals around the axes of the drive-side clutch 17 and the driven-side clutch 18. The cam portions 17A and follower portions 18A, which are convex and protrude in the axial direction, have cam surfaces 17B and sliding surfaces 18B, respectively, at locations that face each other around the axes.

[0033] A plurality of grease grooves 19a are formed on the outer peripheral surface of the clutch pin 19, and a grease injection port 11b and a sealing screw 20 are provided on the casing 11A.

[0034] The output shaft 13 has a polygonal cross section, which is hexagonal in this embodiment. An insertion hole 11c, through which the output shaft 13 is inserted, is provided at the other end of the casing 11A, and the insertion hole 11c has a shape corresponding to the polygonal shape of the output shaft 13. The output shaft 13 engages with the casing 11A around the axis at the insertion hole 11c and is held so as to be movable in the axial direction. Therefore, due to the engagement structure with the insertion hole 11c of the casing 11A, the output shaft 13 is held in the casing 11A so as to be movable only in the axial direction, with the casing 11A absorbing the reaction force against the rotational force transmitted from the drive-side clutch 17 to the driven-side clutch 18.

[0035] Input shaft 12 is rotatably held in casing 11A via bearing 21. Bearing 21 is fixed in the axial direction by bearing lock screws 22, and bearing lock screws 22 are prevented from coming off in the axial direction by snap rings 23, such as C-rings.

[0036] The chuck 14 attached to the output connecting portion 13a of the output shaft 13 grips and removably fixes the tool bit. In this embodiment, the tool bit is a plurality of needle materials 53 with a diameter of 2 to 3 mm, arranged in a pinholder-like bundle at predetermined intervals. Other tool bits may also be used.

[0037] The chuck portion 14 includes a pair of chuck jaws 14a that removably grip the needle material 53, a receiving portion 14b that holds the chuck jaws 14a and is screwed and fixed to the output shaft 13, and a head fastening portion 14c that fits over the chuck jaws 14a and is screwed and attached to the receiving portion 14b. The chuck portion 14 presses both chuck jaws 14a inward against each other using the tapered surfaces on the inner periphery of the head fastening portion 14c, thereby gripping the needle material 53 via the receiving portion 14b.

[0038] Next, the operation of the grinding tool 10 according to the present invention will be described. First, as preparation for use, the input connector 12a of the input shaft 12 of the motion conversion adapter 11 is inserted into the driver chuck 51 of the electric screwdriver 50, and the driver chuck 51 is tightened to fix the input connector 12a. This attaches the motion conversion adapter 11 to the electric screwdriver 50. Next, the needle material 53 is attached to the output connector 13a of the output shaft 13 of the motion conversion adapter 11 via the chuck 14. If necessary, a handle 54 is attached to the outside of the casing 11A of the grinding tool 10. FIG. 1 shows the grinding tool 10, to which the needle material 53 and handle 54 have been attached, attached to the driver chuck 51 of the electric screwdriver 50.

[0039] This completes the preparation for using the grinding tool 10. When using the grinding tool 10, while holding the casing 11A, the needle material 53, which is the tip tool, is brought close to the surface to be machined, and the trigger button 52 of the electric screwdriver 50 is pulled. While the trigger button 52 is being pulled, the electric screwdriver 50 is driven, and the driver chuck portion 51 rotates. Furthermore, as the driver chuck portion 51 rotates, the input shaft 12 rotates integrally with the driver chuck portion 51.

[0040] The rotational motion of the input shaft 12 is converted into axial (front-rear) motion of the output shaft 13 in the motion conversion clutch mechanism 15. More specifically, in the motion conversion clutch mechanism 15, the drive-side clutch 17 rotates together with the input shaft 12, and as the cam portion 17A rotates integrally with the drive-side clutch 17, the cam portion 17A and the follower portion 18A repeatedly engage and disengage.

[0041] When engaged, the cam surface 17B of the cam portion 17A abuts against the sliding surface 18B of the follower portion 18A, and the cam surface 17B presses the outer sliding surface 18B of the follower portion 18A around the axis, causing the follower portion 18A and the driven side clutch 18, i.e., the output shaft 13, to move in a direction away from the drive side clutch 17 against the pressing force of the spring 16.

[0042] During disengagement, the restoring force of the spring 16 causes the follower portion 18A and the driven clutch 18, i.e., the output shaft 13, to move in a direction approaching the drive clutch 17. In other words, as the cam portion 17A and the follower portion 18A engage and disengage, the driven clutch 18 moves forward and backward, and the output shaft 13 moves back and forth in the axial direction.

[0043] When the driven clutch 18 moves in and out, the clutch pin 19 maintains the unity of the drive clutch 17 and the driven clutch 18 in the axial direction, preventing the drive clutch 17 and the driven clutch 18 from vibrating, and keeping the direction of movement of the driven clutch 18 straight. This makes it possible to suppress sliding contact between the drive clutch 17 and the driven clutch 18 and the casing 11A, and to suppress the generation of frictional heat.

[0044] In this way, the rotational motion of the drive-side clutch 17 is converted into axial motion of the driven-side clutch 18, and the chuck portion 14 and the needle material 53, which is the tip tool, move forward and backward as the output shaft 13 moves forward and backward. Then, by pressing this moving forward and backward needle material 53 against the surface to be processed, operations such as peeling and cutting can be performed.

[0045] Therefore, the grinding tool 10 uses an easily portable driving tool such as an electric screwdriver 50 as its driving source, and if an electric screwdriver 50 using a storage battery is used, it becomes easy to carry around without the need for cables, etc. Furthermore, it becomes possible to realize a grinding tool that is compact, easy to work with, and easy to use.

[0046] Furthermore, in the grinding tool 10, the motion conversion clutch mechanism 15 of the motion conversion adapter 11 is maintained in a power-coupled state by the biasing force of the spring 16 from the time the motion conversion adapter 11 is activated. As a result, when the driver chuck 51, which is the output part of the electric screwdriver 50 serving as the driving tool, rotates, causing the input shaft 12 of the motion conversion adapter 11 to rotate, the output shaft 13 of the motion conversion adapter 11 also begins to move back and forth in the axial direction via the motion conversion clutch mechanism 15. In other words, even without forcing the tip end of the output shaft 13 of the motion conversion adapter 11 to press strongly against the surface of the workpiece, when the input shaft 12 rotates due to the rotation of the driver chuck 51 of the electric screwdriver 50, the output shaft 13 also moves back and forth in the axial direction, allowing machining to be performed. As a result, the motion conversion adapter 11 and grinding tool 10 can be used for light contact work, where the needle material 53 attached to the tip end of the output shaft 13 does not want to be pressed strongly against the surface of the workpiece.

[0047] It should be noted that the motion conversion adapter 11 of the above embodiment can also be used with the input shaft 12 and output shaft 13 reversed. That is, it is also possible to connect and fix the output connecting portion 13a of the output shaft 13 to the driver chuck portion 51 of the electric screwdriver 50, and connect and fix the chuck portion 14 to the input connecting portion 12a of the input shaft 12. Therefore, the present invention also includes the case where the input shaft 12 and output shaft 13 of the motion conversion adapter 11 are used in reverse.

[0048] Furthermore, the present invention can be modified or combined in various ways without departing from the spirit of the present invention, and it is natural that the present invention covers such modifications and combinations. [Explanation of symbols]

[0049] 5: Input shaft 10: Grinding tools 11: Motion conversion adapter 11A: Casing 12: Input shaft 12a: Input connection part 13: Output shaft 13a: Output connection part 14: Chuck part 15: Motion conversion clutch mechanism 16: Spring 50: Electric screwdriver 53: Needle material

Claims

1. A motion conversion adapter that can be attached to an output part of a driving tool having a rotating output part, A casing; an input shaft rotatably mounted within the casing such that an input connecting portion attachable to the output portion protrudes from one end of the casing; an output shaft having an output connecting portion, to which a tool bit can be attached, protruding from the other end of the casing and attached within the casing so as to be movable in an axial direction; a motion conversion clutch mechanism provided between the input shaft and the output shaft within the casing, for converting rotational motion of the input shaft into axial motion of the output shaft; a spring that biases the output shaft toward the input shaft via the motion conversion clutch mechanism and maintains the motion conversion clutch mechanism in a power connected state; A motion conversion adapter comprising:

2. 2. The motion conversion adapter according to claim 1, further comprising a chuck portion for attaching the tool bit to the output connecting portion.

3. 3. The motion conversion adapter according to claim 2, wherein the tool tip has a plurality of needle members.

4. 2. The motion conversion adapter according to claim 1, wherein the driving tool is an electric screwdriver.

5. A grinding tool having an output portion that can be attached to a rotating driving tool, The device is provided with a motion conversion adapter, a chuck portion, and a plurality of needle members, The motion conversion adapter is A casing; an input shaft rotatably mounted within the casing such that an input connecting portion to be attached to the output portion protrudes from one end of the casing; an output shaft disposed within the casing so as to be movable in an axial direction with an output connecting portion protruding from the other end of the casing; a motion conversion clutch mechanism provided between the input shaft and the output shaft within the casing, for converting rotational motion of the input shaft into axial motion of the output shaft; a spring that biases the output shaft toward the input shaft via the motion conversion clutch mechanism and maintains the motion conversion clutch mechanism in a power connected state, the chuck portion is attached to the output connection portion outside the casing, The needle material is extended in the axial direction of the output shaft and is replaceably attached to the chuck portion. A grinding tool characterized by:

6. The grinding tool of claim 5, wherein the driving tool is a power screwdriver.

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