tool

Abstract

To reduce a reaction force transmitted to a worker.SOLUTION: A tool 1 includes an output shaft 13, a motor 11, and a housing 2. The motor 11 rotates the output shaft 13. The housing 2 has: a first portion 3; a second portion 4 connected to the first portion 3; and a third portion 5 connected to the second portion 4. The first portion 3 houses at least a part of the output shaft 13 and the motor 11. The second portion 4 protrudes from the first portion 3 along a direction intersecting with a first direction D1 along an axial direction of the output shaft 13. The third portion 5 separates the first portion 3 from a space SP1. The third portion 5 has a holding part 51. In a second direction D2 orthogonal to the first direction D1, a minimal distance X1 between a connection portion between the second portion 4 and the third portion 5 and the first portion 3 is longer than a minimal distance X2 between the holding part 51 and the first portion 3.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] FIELD OF THE DISCLOSURE The present disclosure relates generally to tools, and more particularly to tools including motors. [Background technology]

[0002] Patent Document 1 discloses an impact tool that tightens fastening members by striking an anvil with a hammer. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2022-172946 Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, in an impact tool (tool) such as that described in Patent Document 1, a reaction force is generated during a tightening operation.

[0005] The present disclosure has been made in view of the above-mentioned circumstances, and aims to provide a tool that can reduce the reaction force transmitted to the worker. [Means for solving the problem]

[0006] A tool according to one aspect of the present disclosure includes an output shaft, a motor, and a housing. A tool bit is attached to the output shaft. The motor rotates the output shaft. The housing houses at least a portion of the output shaft and the motor. The housing has a first portion, a second portion connected to the first portion, and a third portion connected to the second portion. The first portion houses at least a portion of the output shaft and the motor. The second portion protrudes from the first portion along a direction intersecting a first direction along the axial direction of the output shaft. The third portion is separated from the first portion by a space. The third portion has a grip portion. In a second direction perpendicular to the first direction, the shortest distance between the first portion and a connecting portion of the second portion and the third portion is longer than the shortest distance between the grip portion and the first portion. [Effects of the Invention]

[0007] According to the present disclosure, it is possible to reduce the reaction force transmitted to the worker. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a side view of a tool according to a first embodiment. [Figure 2] FIG. 2 is a front view of the tool. [Figure 3] FIG. 3 is a rear view of the tool. [Figure 4] FIG. 4 is a side view of the tool according to the second embodiment. [Figure 5] FIG. 5 is a side view of a tool according to the third embodiment. [Figure 6] FIG. 6 is a side view of a tool according to the fourth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] Preferred embodiments of the present disclosure will be described in detail below with reference to the drawings. Common elements in the embodiments described below are designated by the same reference numerals, and redundant descriptions of the common elements may be omitted. The following embodiments and modifications are merely a portion of the various embodiments of the present disclosure. Various modifications of the following embodiments and modifications can be made depending on the design, etc., as long as the object of the present disclosure can be achieved. The configurations of the modifications can also be combined as appropriate.

[0010] The drawings described in this disclosure are schematic diagrams, and the ratios of the sizes and thicknesses of the components in the drawings do not necessarily reflect the actual dimensional ratios. Note that the arrows indicating the directions in the drawings are merely examples and are not intended to define the directions in which the tool 1 should be used. Also, the arrows indicating the directions in the drawings are merely shown for the purpose of explanation and do not have any substance.

[0011] In this disclosure, "orthogonal (perpendicular)" refers not only to a state where the angle between two things is exactly 90 degrees, but also to a state where two things intersect within a certain range of difference. In other words, the angle between two orthogonal things is within a certain range of difference from 90 degrees (for example, 10 degrees or less). In other words, "orthogonal" in this disclosure includes a case where the angle between two things is between 80 degrees and 100 degrees. Similarly, "parallel" in this disclosure includes not only a case where two things do not strictly intersect, but also a case where two things are lined up within a certain range of difference. For example, "parallel" in this disclosure includes a case where one thing is inclined at an angle of 10 degrees or less relative to the other. In other words, "parallel" in this disclosure includes a case where the angle between one thing and the other is between -10 degrees and 10 degrees.

[0012] (Embodiment 1) (1) Overview First, an overview of the tool 1 according to the first embodiment will be described with reference to FIG. 1 . In the following description, the direction from the motor shaft 111 of the motor 11 toward the output shaft 13 will be referred to as the forward direction, and the direction from the output shaft 13 toward the motor shaft 111 will be referred to as the rearward direction. In the following description, the forward direction and the rearward direction will sometimes be collectively referred to as the "front-rear direction." In the first embodiment, the axial direction of the output shaft 13 and the rotation axis Ax1 are aligned along the front-rear direction. In the following description, the direction from the third section 5 toward the first section 3 of the housing 2 will be referred to as the upward direction, and the direction from the first section 3 toward the third section 5 will be referred to as the downward direction. In the following description, the upward direction and the downward direction will sometimes be collectively referred to as the "vertical direction." In the following description, the vertical direction is perpendicular to the front-rear direction. In addition, a direction perpendicular to both the front-rear direction and the vertical direction will sometimes be referred to as the "horizontal direction."

[0013] The tool 1 includes an output shaft 13, a motor 11, and a housing 2.

[0014] A tip tool 17 such as a socket is attached to the output shaft 13 .

[0015] The motor 11 rotates the output shaft 13 .

[0016] The housing 2 houses at least a portion of the output shaft 13 and the motor 11. The housing 2 of the first embodiment houses a portion of the output shaft 13 and the motor 11. Note that the term "house" as used in this disclosure is intended to include not only a case where one object completely surrounds another object, but also a case where one object surrounds another object so that a portion of the other object is exposed from the first object.

[0017] The housing 2 has a first portion 3, a second portion 4 connected to the first portion 3, and a third portion 5 connected to the second portion 4.

[0018] The first portion 3 accommodates at least a portion of the output shaft 13 and the motor 11. The first portion 3 of the first embodiment accommodates a portion of the output shaft 13 and the motor 11.

[0019] The second portion 4 protrudes from the first portion 3 in a direction intersecting with the first direction D1. The first direction D1 is the axial direction of the output shaft 13. In the first embodiment, the protruding direction of the second portion 4 (i.e., the direction intersecting with the first direction D1) coincides with a second direction D2, which will be described later.

[0020] The third portion 5 is separated from the first portion 3 by a space SP1. The third portion 5 has a grip portion 51.

[0021] In a second direction D2 perpendicular to the first direction D1, the shortest distance X1 between the first part 3 and the connecting portion of the second part 4 and the third part 5 is longer than the shortest distance X2 between the grip part 51 and the first part 3. Note that the connecting portion in the first embodiment is the rear end part 521 of the attachment part 52 provided at the lower end of the third part 5.

[0022] In a rotary tool having a motor, a reaction force of a tightening operation is transmitted to a housing, and then transmitted to an operator holding the rotary tool. The reaction force transmitted to the operator becomes smaller as the operator grips the rotary tool at a position farther from the rotation axis of the output shaft. However, the operability of the rotary tool becomes worse as the operator grips the rotary tool at a position farther from the rotation axis of the output shaft.

[0023] In the tool 1 of the first embodiment, the third portion 5 having the grip portion 51 is spaced apart from the first portion 3. Therefore, the reaction force transmitted to the first portion 3 is transmitted to the third portion 5 via the second portion 4. Here, the shortest distance X2 between the grip portion 51 and the first portion 3 in the second direction D2 is shorter than the shortest distance X1 between the first portion 3 and the connecting portion of the second portion 4 and the third portion 5. As a result, the reaction force transmitted to the operator is equivalent to the reaction force transmitted to the operator if the operator were holding the connecting portion. Note that the connecting portion is located at a position similar to the attachment portion for attaching a battery pack in a typical impact wrench. In other words, the tool 1 of the first embodiment reduces the reaction force transmitted from the tool 1 to the operator while preventing the position where the operator holds the tool 1 from becoming far from the rotation axis Ax1 of the output shaft 13.

[0024] (2)Details Hereinafter, a detailed configuration of the tool 1 according to the first embodiment will be described with reference to FIGS.

[0025] The tool 1 of the first embodiment is a portable power tool such as an impact wrench, etc. The tool 1 performs a tightening operation to tighten a fastening part such as a bolt by rotating a tip tool 17 such as a socket.

[0026] As shown in FIG. 1, the tool 1 includes a motor 11, a transmission mechanism 12, an output shaft 13, a housing 2, an elastic member 7, an operating unit 14, a control unit 15, a battery pack 16, and a tool tip 17.

[0027] The motor 11 is, for example, a brushless motor. The motor 11 has a motor shaft 111. The motor 11 converts the power supplied from the battery pack 16 into a rotational driving force (torque) of the motor shaft 111.

[0028] The transmission mechanism 12 is disposed before the motor 11. The transmission mechanism 12 transmits the rotational force of the motor shaft 111 of the motor 11 to the output shaft 13. The transmission mechanism 12 of the first embodiment has a reduction mechanism 121 and an impact mechanism 122.

[0029] The speed reduction mechanism 121 in the first embodiment is a planetary gear mechanism. The planetary gear mechanism converts the rotation speed and torque of the motor shaft 111 into the rotation speed and torque required for the fastening operation and transmits them to the drive shaft and the output shaft 13. As a result, the drive shaft and the output shaft 13 rotate around the rotation axis Ax1.

[0030] The planetary gear mechanism includes a sun gear, multiple planetary gears, and an internal gear. In the first embodiment, the outermost internal gear among the sun gear, multiple planetary gears, and internal gear is fixed to the first part 3 of the housing 2 so as not to rotate. As a result, when the tool 1 performs a tightening operation or the like, a reaction force is transmitted from the internal gear to the first part 3 of the housing 2.

[0031] The impact mechanism 122 is disposed in front of the reduction mechanism 121. The impact mechanism 122 includes a hammer rotatably supported by the drive shaft, and an anvil (striking portion) provided at the rear end of the output shaft 13. The hammer strikes the anvil in response to the rotation of the drive shaft.

[0032] When the tightening torque exceeds a predetermined level, the impact mechanism 122 applies an impact in the rotational direction to the output shaft 13. This enables the tool 1 to apply a larger tightening torque to a fastening component such as a bolt.

[0033] A tool 17, such as a socket for rotating a fastening part, is detachably attached to the output shaft 13. The tool 17 rotates together with the output shaft 13 around the rotation axis Ax1. The size of the tool 17 attached to the output shaft 13 is selected appropriately by the operator according to the size of the fastening part. With this configuration, when the motor 11 operates, the output shaft 13 rotates, and the tool 17 rotates together with the output shaft 13. At this time, if the tool 17 is fitted into the fastening part, the fastening part rotates together with the tool 17, thereby performing the task of tightening the fastening part (tightening operation).

[0034] The tip tool 17 may be a socket anvil or the like. The socket anvil is also removably attached to the output shaft 13. In this case, a bit (for example, a driver bit or a drill bit) can be attached via the socket anvil.

[0035] The battery pack 16 is a power source that supplies current to drive the motor 11. The battery pack 16 includes a battery pack configured by connecting multiple secondary batteries (e.g., lithium ion batteries or all-solid-state batteries) in series, and a case that houses the battery pack. The battery pack 16 is attached to a mounting portion 52 (described later) of the housing 2. Note that it is not essential for the tool 1 to include the battery pack 16.

[0036] The operation unit 14 is an operation unit for driving the motor 11. More specifically, the operation unit 14 is an operation unit that accepts operations for controlling the rotation of the motor 11. The operation unit 14 in the first embodiment is provided on the grip portion 51 of the third section 5.

[0037] The operation unit 14 in the first embodiment is a trigger switch. Pulling the trigger switch can switch the motor 11 on and off. The rotation speed of the motor 11 can be adjusted by the amount of pulling the trigger switch. The greater the amount of pulling, the faster the rotation speed of the motor 11.

[0038] The control unit 15 includes a computer system having one or more processors and a memory. At least some of the functions of the control unit 15 are realized by the processor of the computer system executing a program recorded in the memory of the computer system. The program may be recorded in the memory, or may be provided via a telecommunications line such as the Internet, or may be provided by being recorded on a non-transitory recording medium such as a memory card.

[0039] The control unit 15 controls the motor 11, for example. The control unit 15 controls the motor 11, for example, by vector control. The control unit 15 decomposes the motor current, which is the current supplied to the motor 11, into a torque current (q-axis current) that generates torque and an excitation current (d-axis current) that generates magnetic flux, and controls each current component independently. Note that the method by which the control unit 15 controls the motor 11 is not limited to vector control, and a control method other than vector control may also be used.

[0040] The housing 2 has a first portion 3, a second portion 4, and a third portion 5. In the first embodiment, the first portion 3, the second portion 4, and the third portion 5 are integrally formed. This ensures the strength of the connection portions of the first portion 3, the second portion 4, and the third portion 5.

[0041] In the first embodiment, the second portion 4 and the third portion 5 form a U-shape when viewed from the third direction D3. Here, the third direction D3 is perpendicular to both the first direction D1 and the second direction D2.

[0042] The first portion 3 has a cylindrical shape centered on the output shaft 13. However, the cylindrical shape of the first portion 3 is not essential, and the shape of the first portion 3 may be a rectangular tube or the like. The first portion 3 of the first embodiment is elongated along the first direction D1.

[0043] The first section 3 houses a mechanism for performing a tightening operation of the tool 1. In the first embodiment, the control section 15 is housed in the third section 5, but the first section 3 may house the control section 15. The first section 3 houses a part of the output shaft 13, the transmission mechanism 12, and the motor 11.

[0044] The second part 4 connects the first part 3 and the third part 5. In other words, the second part 4 is a connecting member between the first part 3 and the third part 5. The second part 4 protrudes from the outer surface of the first part 3 along a direction intersecting the first direction D1. In the first embodiment, the second part 4 protrudes from the outer surface of a rear part of the first part 3 in the first direction D1 along a second direction D2 that is perpendicular to the first direction D1. The rear part of the first part 3 in the first direction D1 refers to a part of the first part 3 that is rearward of the center of the first part 3 in the first direction D1.

[0045] As shown in FIG. 3, the second part 4 has an annular shape when viewed from the first direction D1. More specifically, the second part 4 has an elongated circular shape along the second direction D2. The second part 4 has an elliptical opening 41 formed therein. When viewed from the first direction D1, the entire (or substantially the entire) grip portion 51 can be seen through the opening 41. The opening 41 is sized to allow an operator's hand to pass through when gripping the grip portion 51 of the third part 5.

[0046] When gripping the tool 1, the worker passes his / her hand through the opening 41 of the second portion 4 and then grips the grip portion 51 of the third portion 5. According to the tool 1 of the first embodiment, the second portion 4 has an annular shape, and therefore the second portion 4 is less likely to get in the way of the worker.

[0047] As shown in FIG. 1 , the third part 5 is connected to the second part 4. In the first embodiment, the third part 5 is disposed in front of the second part 4. In other words, the third part 5 is disposed closer to the tip 131 of the output shaft 13 in the first direction D1 than the second part 4. In other words, the grip part 51 of the third part 5 is disposed closer to the tip 131 of the output shaft 13 in the first direction D1 than the second part 4. This allows the grip part 51 held by the operator to be closer to the tip 131 of the output shaft 13, thereby improving the operability of the tool 1.

[0048] The third portion 5 is elongated when viewed from the third direction D3. The longitudinal direction of the third portion 5 in the first embodiment is aligned with the second direction D2. The third portion 5 is arranged to be aligned with the output shaft 13 in the longitudinal direction of the third portion 5 (the second direction D2 in the first embodiment). More specifically, the third portion 5 in the first embodiment is arranged below the output shaft 13. This brings the grip portion 51 held by the operator closer to the tip 131 of the output shaft 13, thereby improving the operability of the tool 1.

[0049] The third portion 5 has a grip portion 51 , an attachment portion 52 , and a facing portion 53 .

[0050] The attachment portion 52 is disposed at the lower end of the third portion 5. The attachment portion 52 has a flat rectangular parallelepiped shape in the second direction D2. The battery pack 16 is removably attached to one surface (lower surface) of the attachment portion 52 opposite to the grip portion 51. A rear end portion 521 of the attachment portion 52 is connected to the lower end portion of the second portion 4. In other words, the rear end portion 521 is the connecting portion between the second portion 4 and the third portion 5. The attachment portion 52 of the first embodiment protrudes forward from the lower end of the second portion 4. In other words, the second portion 4 and the attachment portion 52 of the third portion 5 form an L shape when viewed from the third direction D3.

[0051] The grip portion 51 is a portion that is gripped by the worker's hand when the worker uses the tool 1. The grip portion 51 protrudes from the center of the upper surface of the mounting portion 52 toward the first portion 3. The grip portion 51 of the first embodiment protrudes upward from the upper surface of the mounting portion 52 along the second direction D2. The grip portion 51 connects the mounting portion 52 and the facing portion 53.

[0052] The grip portion 51 of the first embodiment has a cylindrical shape that is long along the second direction D2. The grip portion 51 may have a rectangular cylindrical shape. The grip portion 51 of the first embodiment houses the control unit 15. As described above, the grip portion 51 is provided with the operation unit 14. The operation unit 14 protrudes forward from the upper end of the grip portion 51. By providing the operation unit 14 on the grip portion 51, it is possible to reduce the reaction force transmitted to the hand of the operator who operates the operation unit 14.

[0053] The facing portion 53 is disposed above the grip portion 51. The facing portion 53 has a flat rectangular parallelepiped shape in the second direction D2. In the second direction D2, the lower end of the facing portion 53 is at approximately the same position as the upper end of the operating portion 14 (trigger switch). The facing portion 53 has a facing surface 531 that faces the first portion 3.

[0054] A normal to the opposing surface 531 in the first embodiment is parallel to the second direction D2. The opposing surface 531 is separated from the first portion 3 via a space SP1. As shown in FIGS. 1 and 2, a recess 532 is formed in the opposing surface 531. The recess 532 has a rectangular shape that is elongated along the first direction D1 when viewed from the second direction D2. An elastic member 7, which will be described later, is fitted into the recess 532.

[0055] The elastic member 7 supports the first portion 3 in the vertical direction. In the example of FIG. 1, the second direction D2 and the vertical direction are parallel to each other. The elastic member 7 is disposed in the space SP1. More specifically, the elastic member 7 is disposed in the space SP1 by being fitted into the recess 532 of the third portion 5. The elastic member 7 contacts the first portion 3 and the bottom surface of the recess 532 of the third portion 5 in the second direction D2. Disposing the elastic member 7 in the space SP1 can prevent failure of the connecting portion between the first portion 3 and the second portion 4. Furthermore, because the elastic member 7 has elasticity, the reaction force transmitted from the first portion 3 to the elastic member 7 is less likely to be transmitted to the third portion 5.

[0056] The elastic member 7 has elasticity. The elastic member 7 is made of, for example, rubber. The elastic member 7 in the first embodiment has a shape that is elongated along the first direction D1. More specifically, the elastic member 7 has a shape that is elongated along the first direction D1. This makes it possible to further suppress breakdowns and the like at the connecting portion between the first portion 3 and the second portion 4, while further suppressing the transmission of the reaction force to the third portion 5.

[0057] 2, the width X3 (or diameter) of the elastic member 7 in the third direction D3 is narrower than the width X4 (or diameter) of the output shaft 13 in the third direction D3. This makes it possible to further suppress the reaction force from being transmitted to the third portion 5.

[0058] (3) Variations Modifications of the first embodiment are listed below.

[0059] In the first embodiment, the second portion 4 and the third portion 5 form a U-shape when viewed from the third direction D3. However, it is not essential that the second portion 4 and the third portion 5 form a U-shape when viewed from the third direction D3. For example, the second portion 4 and the third portion 5 may form a V-shape or a J-shape when viewed from the third direction D3. That is, the second portion 4 may protrude obliquely downward from the first portion 3, or the third portion 5 may protrude obliquely upward from, for example, the lower end of the second portion 4. Furthermore, the connecting portion between the second portion 4 and the third portion 5 is not limited to the rear end 521 of the mounting portion 52, but may be a side portion of the mounting portion 52 or a lower end of the grip portion 51.

[0060] The shape of the elastic member 7 may be a prismatic shape such as a triangular prism or a quadrangular prism. Furthermore, it is not essential that the shape of the elastic member 7 be elongated along the first direction D1. The shape of the elastic member 7 may be any shape that supports the first portion 3 in the vertical direction and makes it difficult for the reaction force transmitted from the first portion 3 to the elastic member 7 to be transmitted to the third portion 5.

[0061] In the first embodiment, the case where the respective parts of the housing 2, i.e., the first part 3, the second part 4, and the third part 5, are integrally formed has been exemplified. However, it is not essential that the first part 3, the second part 4, and the third part 5 are integrally formed. Any of the first part 3, the second part 4, and the third part 5 may be configured to be separable. For example, the first part 3 and the second part 4 may be configured to be separable. Furthermore, the second part 4 and the third part 5 may be configured to be separable. By configuring any of the first part 3, the second part 4, and the third part 5 to be separable, it becomes easier to carry and store the tool 1.

[0062] In the first embodiment, the tool 1 is described as an impact wrench, but the tool 1 may also be, for example, a driver (including an impact driver) used for tightening screws. In this case, a bit (e.g., a driver bit) is attached to the tool 1 instead of a socket. Furthermore, the tool 1 is not limited to being powered by the battery pack 16, and may also be powered by an AC power source (commercial power source).

[0063] (Embodiment 2) A tool 1A according to a second embodiment will be described with reference to Fig. 4. The tool 1 of the second embodiment differs from the tool 1 of the first embodiment in that the second portion 4A is disposed in front of the third portion 5.

[0064] The second part 4A connects the first part 3 and the third part 5. In other words, the second part 4A is a connecting member between the first part 3 and the third part 5. The second part 4A protrudes from the outer surface of the first part 3 along a direction intersecting the first direction D1. In the second embodiment, the second part 4A protrudes from the outer surface of a front part of the first part 3 in the first direction D1 along a second direction D2 that is perpendicular to the first direction D1. The front part of the first part 3 in the first direction D1 refers to a part of the first part 3 that is forward of the center of the first part 3 in the first direction D1.

[0065] The second portion 4A has a shape of, for example, a rectangular parallelepiped that is flattened in the first direction D1, but may have a cylindrical or prismatic shape, or may have a ring shape when viewed in the first direction D1, like the second portion 4 of the first embodiment.

[0066] The third portion 5 is connected to the second portion 4A. In the second embodiment, the third portion 5 is disposed behind the second portion 4A. As in the first embodiment, the third portion 5 is separated from the first portion 3 by a space SP1.

[0067] A front end 522 of the mounting portion 52 of the third portion 5 is connected to the lower end of the second portion 4A. That is, the front end 522 is a connecting portion between the second portion 4A and the third portion 5. The mounting portion 52 of the second embodiment protrudes rearward from the lower end of the second portion 4A. That is, the second portion 4A and the mounting portion 52 of the third portion 5 form an L shape when viewed from the third direction D3.

[0068] In the second direction D2, the shortest distance between the first part 3 and the connecting part of the second part 4A and the third part 5 is longer than the shortest distance between the grip part 51 and the first part 3.

[0069] According to the tool 1A of the second embodiment, similarly to the tool 1 of the first embodiment, it is possible to reduce the reaction force transmitted from the tool 1A to the worker.

[0070] (Embodiment 3) A tool 1B according to a third embodiment will be described with reference to Fig. 5. The tool 1B of the third embodiment differs from the tool 1 of the first embodiment in that the second portion 4B is disposed laterally of the third portion 5.

[0071] The second part 4B connects the first part 3 and the third part 5. In other words, the second part 4B is a connecting member between the first part 3 and the third part 5. The second part 4B protrudes from the outer surface of the first part 3 along a direction intersecting the first direction D1. In the third embodiment, the second part 4B protrudes from the outer surface of the first part 3 in the first direction D1 along a second direction D2 that is perpendicular to the first direction D1.

[0072] The second portion 4B has an annular shape when viewed from the first direction D1, similar to the second portion 4 of embodiment 1. As in embodiment 1, the second portion 4B has an oval opening 41 (see FIGS. 2 and 3). The opening 41 is large enough to allow an operator's hand to pass through when gripping the grip portion 51 of the third portion 5.

[0073] The third portion 5 is connected to the second portion 4B. The third portion 5 of the third embodiment is disposed so as to be sandwiched between the annular second portions 4B in the third direction D3. In other words, a portion of the third portion 5 is surrounded by the edge of the opening 41 of the second portion 4B. As in the first embodiment, the third portion 5 is separated from the first portion 3 by a space SP1.

[0074] The left and right (pair of) side surface portions 523 of the attachment portion 52 of the third portion 5 are connected to the lower end portion of the second portion 4B. In other words, the side surface portions 523 are connecting portions between the second portion 4B and the third portion 5.

[0075] In the second direction D2, the shortest distance between the first part 3 and the connecting part of the second part 4B and the third part 5 is longer than the shortest distance between the grip part 51 and the first part 3.

[0076] According to the tool 1B of the third embodiment, similarly to the tool 1 of the first embodiment, it is possible to reduce the reaction force transmitted from the tool 1B to the worker.

[0077] (Embodiment 4) A tool 1C according to a fourth embodiment will be described with reference to Fig. 6. The tool 1C of the fourth embodiment differs from the tool 1 of the first embodiment in that it includes a housing 2A instead of the housing 2. Furthermore, the tool 1C does not include an elastic member 7.

[0078] The housing 2A has a first portion 3, a second portion 4C, and a third portion 5A. In the fourth embodiment, the second portion 4C and the third portion 5A are configured to be separable. However, the second portion 4C and the third portion 5A may be integrally formed. Furthermore, the second portion 4C and the third portion 5A form a U-shape when viewed from the third direction D3.

[0079] The first portion 3 and the second portion 4C of the tool 1C may have a configuration similar to that of a typical impact wrench, for example.

[0080] The second portion 4C is connected to the first portion 3. The second portion 4C also connects the first portion 3 and the third portion 5A. In other words, the second portion 4C is a connecting member between the first portion 3 and the third portion 5A. The second portion 4C protrudes from the outer surface of the first portion 3 in a direction intersecting with the first direction D1.

[0081] The second portion 4C has a first gripping portion 41C and an attachment portion 42C.

[0082] The mounting portion 42C is disposed at the lower end of the second portion 4C. The shape of the mounting portion 42C is a flat rectangular parallelepiped in the second direction D2. The battery pack 16 is removably mounted on one surface (lower surface) of the mounting portion 42C opposite to the first grip portion 41C. The mounting portion 42C is connected to the lower end of the third portion 5A.

[0083] The first grip portion 41C is a portion that is held by the worker's hand when the worker uses the tool 1C. The first grip portion 41C protrudes from the center of the upper surface of the mounting portion 42C toward the first portion 3. The first grip portion 41C of the first embodiment protrudes upward from the upper surface of the mounting portion 42C along the second direction D2. The first grip portion 41C connects the mounting portion 42C and the first portion 3.

[0084] The first grip portion 41C has a cylindrical shape that is long in the second direction D2. The first grip portion 41C accommodates the control unit 15 (see FIG. 1). The first grip portion 41C also has the operation unit 14.

[0085] The third portion 5A is connected to the second portion 4C and is separated from the first portion 3 by a space SP1.

[0086] The third portion 5A has a second grip portion 51A, a first connecting portion 52A, and a second connecting portion 53A.

[0087] The first connecting portion 52A is disposed in front of the mounting portion 42C of the second portion 4C and is connected to the front end of the mounting portion 42C.

[0088] The second connecting portion 53A is disposed below the mounting portion 42C of the second part 4C. The second connecting portion 53A is hooked onto the battery pack 16 and connected to the mounting portion 42C.

[0089] The second grip portion 51A is a portion that is held by the worker's hands when the worker uses the tool 1C. That is, a worker using the tool 1C holds the tool 1C with both hands during a tightening operation. For example, during a tightening operation, the second grip portion 51A is held by the worker's left hand, and the first grip portion 41C is held by the worker's right hand. The second grip portion 51A protrudes upward from the left end of the second connecting portion 53A. The second grip portion 51A has, for example, a cylindrical shape. The upper surface of the second grip portion 51A faces the first portion 3. The second grip portion 51A is separated from the first portion 3 by a space SP1.

[0090] In the second direction D2, the shortest distance between the first portion 3 and first connecting portion 52A, which is the connecting portion between the second portion 4C and the third portion 5A, is longer than the shortest distance between the second gripping portion 51A and the first portion 3. In addition, the shortest distance between the first connecting portion 52A and the first portion 3 is longer than the shortest distance between the first gripping portion 41C and the first portion 3.

[0091] According to the tool 1C of the fourth embodiment, similarly to the tool 1 of the first embodiment, it is possible to reduce the reaction force transmitted from the tool 1C to the worker.

[0092] (summary) As is clear from the above-described embodiment and modified examples, the tool (1) according to the first aspect includes an output shaft (13), a motor (11), and a housing (2). A tool bit (17) is attached to the output shaft (13). The motor (11) rotates the output shaft (13). The housing (2) houses at least a portion of the output shaft (13) and the motor (11). The housing (2) has a first portion (3), a second portion (4) connected to the first portion (3), and a third portion (5) connected to the second portion (4). The first portion (3) houses at least a portion of the output shaft (13) and the motor (11). The second portion (4) protrudes from the first portion (3) in a direction intersecting a first direction (D1) along the axial direction of the output shaft (13). The third portion 5 is separated from the first portion 3 via a space SP1. The third portion 5 has a grip portion 51. In a second direction D2 perpendicular to the first direction D1, the shortest distance X1 between the first portion 3 and a connecting portion (rear end portion 521) of the second portion 4 and the third portion 5 is longer than the shortest distance X2 between the grip portion 51 and the first portion 3.

[0093] According to this aspect, it is possible to reduce the reaction force transmitted to the worker.

[0094] In the tool (1) according to the second aspect, in the first aspect, the second portion (4) and the third portion (5) form a U-shape when viewed from a third direction (D3) perpendicular to both the first direction (D1) and the second direction (D2).

[0095] The tool 1 according to the third aspect is the tool 1 according to the first or second aspect, further including an operating part 14 for driving the motor 11. The operating part 14 is provided on the grip part 51.

[0096] According to this embodiment, it is possible to reduce the reaction force transmitted to the hand of the operator operating the operating portion (14).

[0097] In the tool (1) according to the fourth aspect, in any one of the first to third aspects, the first portion (3), the second portion (4), and the third portion (5) are integrally formed.

[0098] According to this embodiment, the strength of the connection portions of the first portion (3), the second portion (4), and the third portion (5) can be ensured.

[0099] In the tool (1) according to the fifth aspect, in any of the first to third aspects, any of the first portion (3), the second portion (4), and the third portion (5) is separable from the other portions.

[0100] According to this embodiment, the tool (1) can be easily carried and stored.

[0101] In the tool (1) according to the sixth aspect, in the third aspect, the third portion (5) is disposed at a position closer to the tip (131) of the output shaft (13) in the first direction (D1) than the second portion (4). The shape of the second portion (4) is annular when viewed from the first direction (D1).

[0102] According to this embodiment, the second portion 4 is less likely to get in the way of the operator, and the operability of the tool 1 can be improved.

[0103] In the tool (1) according to a seventh aspect, in any one of the first to sixth aspects, the third portion (5) is elongated when viewed from the third direction (D3). The third direction (D3) is perpendicular to both the first direction (D1) and the second direction (D2). The third portion (5) is arranged so as to be aligned with the output shaft (13) in the longitudinal direction of the third portion (5).

[0104] According to this aspect, the operability of the tool (1) can be improved.

[0105] The tool 1 according to an eighth aspect is the tool 1 according to any one of the first to seventh aspects, further including an elastic member 7. The elastic member 7 supports the first portion 3 in the vertical direction. The elastic member 7 is disposed in the space SP1.

[0106] According to this embodiment, it is possible to prevent failures or the like at the connecting portion between the first portion (3) and the second portion (4).

[0107] In the tool (1) according to the ninth aspect, in the eighth aspect, the shape of the elastic member (7) is elongated along the first direction (D1).

[0108] According to this embodiment, it is possible to further suppress breakdowns and the like at the connecting portion between the first portion (3) and the second portion (4), and also to further suppress the transmission of the reaction force to the third portion (5).

[0109] In the tool (1) according to the tenth aspect, in the eighth or ninth aspect, the width (X3) of the elastic member (7) in the third direction (D3) is narrower than the width (X4) of the output shaft (13) in the third direction (D3). The third direction (D3) is perpendicular to both the first direction (D1) and the second direction (D2).

[0110] According to this embodiment, the reaction force can be further prevented from being transmitted to the third portion (5).

[0111] The configurations other than those of the first aspect are not essential to the tool (1) and can be omitted as appropriate. [Explanation of symbols]

[0112] 1 tool 11 Motor 13 Output shaft 131 Tip 14 Control section 17 Tip tools 2. Case 3 Part 1 4 Part 2 5 Part 3 51 Gripping part 7 Elastic member D1 1st direction D2 2nd direction D3 Third direction SP1 Space X1 Shortest distance X2 Shortest distance X3 width X4 width

Claims

1. an output shaft to which a tool tip is attached; a motor that rotates the output shaft; a housing that accommodates at least a portion of the output shaft and the motor; Equipped with the housing has a first portion, a second portion connected to the first portion, and a third portion connected to the second portion; the first portion accommodates at least a portion of the output shaft and the motor; the second portion protrudes from the first portion along a direction intersecting a first direction that is an axial direction of the output shaft, The third portion is the first portion is separated from the second portion by a space; A gripping portion is provided. In a second direction perpendicular to the first direction, a shortest distance between a connecting portion of the second portion and the third portion and the first portion is longer than a shortest distance between the grip portion and the first portion. tool.

2. the second portion and the third portion form a U-shape when viewed from a third direction perpendicular to both the first direction and the second direction; The tool of claim 1.

3. further comprising an operation unit for driving the motor; The operation unit is provided on the grip unit. The tool of claim 1.

4. the first portion, the second portion, and the third portion are integrally formed. The tool of claim 1.

5. Any one of the first part, the second part, and the third part is separable from the other parts. The tool of claim 1.

6. the third portion is disposed at a position closer to a tip of the output shaft than the second portion in the first direction, The second portion has an annular shape when viewed from the first direction. The tool of claim 3.

7. the third portion is elongated when viewed in a third direction perpendicular to both the first direction and the second direction, and is arranged to be aligned with the output shaft in the longitudinal direction of the third portion. The tool of claim 1.

8. further comprising an elastic member that supports the first portion in the vertical direction; The elastic member is disposed in the space. The tool of claim 1.

9. The elastic member has a shape that is elongated along the first direction. The tool of claim 8.

10. a width of the elastic member in a third direction perpendicular to both the first direction and the second direction is narrower than a width of the output shaft in the third direction; The tool of claim 8.

Images