Tool and cap

Abstract

An object of the present disclosure is to reduce the possibility of a worker changing a preset torque. A tool (1) includes an output shaft (5), a motor (3), a housing (2), a clutch member, an operation member, and a cover (6). The clutch member is configured to switch a transmission state in which the clutch member transmits torque to the output shaft (5) to a cutoff state in which the clutch member does not transmit torque to the output shaft (5) if torque transmitted from the motor (3) to the output shaft (5) becomes equal to or greater than a preset torque. The operation member is an operation member with which the preset torque is set. The cover (6) covers the operation member. The cover (6) includes a first cover and a second cover (8). The first cover is removably attached to the housing (2) by being turned onto the housing (2). The second cover (8) covers the first cover. The second cover (8) is configured to be ready to rotate with the first cover in a first state. The second cover (8) is configured to be ready to freely idle on the first cover in a second state.

Description

Technical Field

[0001] This disclosure relates generally to tools and covers, and more particularly to tools including motors and covers used with tools. Background Technology

[0002] Patent Document 1 discloses a power tool comprising a housing, a motor, and an output shaft. In the power tool of Patent Document 1, the rotational operation of the dial allows for the setting of the clutch actuation torque.

[0003] Incidentally, depending on the intended use of the power tool, the operator may intentionally alter the clutch actuation torque (preset torque) of the tool, which is not advisable. Existing technical documents Patent documents

[0004] Patent Document 1: Japanese Patent Application Publication No. 2021-024043 Summary of the Invention

[0005] In view of the foregoing background, the purpose of this disclosure is to provide tools and covers designed to reduce the likelihood of operators changing preset torque.

[0006] The tool according to one aspect of this disclosure includes an output shaft, a motor, a housing, a clutch member, an operating member, and a cover. A front-end tool is attached to the output shaft. Movement of the motor causes the output shaft to rotate. The clutch member is configured to switch from a torque transmission state (transmitting torque from the clutch member to the output shaft) to a disengaged state (not transmitting torque from the clutch member to the output shaft) when the torque transmitted from the motor to the output shaft becomes equal to or greater than a preset torque. The operating member is an operating member used to set the preset torque. The cover covers the operating member. The cover includes a first cover and a second cover. The first cover is removably attached to the housing by rotating it onto the housing. The second cover covers the first cover. The second cover is configured to be ready to rotate together with the first cover in a first state. The second cover is configured to be ready to freely oscillate on the first cover in a second state.

[0007] According to another aspect of this disclosure, the cover is used as a cover for the aforementioned tool. Attached Figure Description

[0008] Figure 1 This is a schematic diagram illustrating a tool according to a typical embodiment; Figure 2 This is a schematic diagram illustrating the operating components of the tool; Figure 3 This is a three-dimensional view illustrating the main parts of the tool; Figure 4This is an exploded perspective view illustrating the lid of the tool; Figure 5 This is a cross-sectional view illustrating the tool's cover in a second state; Figure 6 This is a cross-sectional view illustrating the tool's cover in its first state; and Figure 7 This is a cross-sectional view illustrating the tool cover in the second state according to a modified example. Detailed Implementation

[0009] Preferred embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. In the following description of the embodiments, constituent elements illustrated in the various drawings and having the same features will be designated by the same reference numerals, and their description will be omitted herein to avoid redundancy. Note that the embodiments and variations thereof described below are merely typical embodiments among the various embodiments of the present disclosure and should not be construed as limiting. Rather, these typical embodiments and variations thereof can be readily modified in various ways according to design choices or any other factors without departing from the scope of the present disclosure. It should also be noted that the variations described below can be appropriately combined.

[0010] Note that all figures referenced in the following description of the embodiments are schematic diagrams. Therefore, the aspect ratios (including thicknesses) of the various constituent elements illustrated in the figures do not always reflect their actual aspect ratios. Arrows used to indicate directions in the figures are exemplary directions, and these definitions should not be construed as defining directions assuming the use of tool 1. Arrows used to indicate directions in the figures are shown herein for illustrative purposes only and are not substantial.

[0011] As used herein, if two things are “perpendicular to each other (or intersect each other at a right angle),” this statement means not only that the angle between them is exactly 90 degrees, but also that the difference between the angle and 90 degrees falls within a certain tolerance range. That is, the angle between two perpendicular things falls within 90 degrees plus or minus a certain tolerance (e.g., 10 degrees or less). In other words, the phrase “perpendicular to” as used herein means that the angle between them is equal to or greater than 80 degrees and equal to or less than 100 degrees. Note that if something is “parallel to” something else, this phrase means not only that the two things never intersect each other in the strict sense of the word, but also that they intersect each other within a certain range of difference. For example, the phrase “parallel to” as used herein also means that the angle of inclination defined by one relative to the other is equal to or less than 10 degrees. That is, the phrase “parallel to” as used herein can also mean that the angle between one and another is equal to or greater than -10 degrees and equal to or less than 10 degrees.

[0012] (1) Summary Reference Figures 1 to 4 A summary of tool 1 according to an embodiment is described.

[0013] like Figure 1 As shown, tool 1 according to an embodiment is, for example, a power tool designed so that an operator (or user) can hold it with only one of his or her hands. A front-end tool X1, such as a screwdriver or drill bit, may be attached to tool 1 according to an embodiment. In the embodiment, it is assumed that the front-end tool X1 is implemented as a screwdriver or drill bit, and it is assumed that tool 1 is implemented as an electric screwdriver used for tightening operations of screws.

[0014] Tool 1 includes output shaft 5, motor 3, housing 2, and clutch assembly 42 (reference). Figure 2 ), Operating component 9 (reference) Figure 2 ) and cover 6.

[0015] The front-end tool X1 will be attached to output axis 5.

[0016] The movement of motor 3 causes output shaft 5 to rotate.

[0017] The clutch component 42 is configured to switch from a torque transmission state to a torque cut-off state in which the clutch component 42 does not transmit torque to the output shaft 5 when the torque transmitted from the motor 3 to the output shaft 5 becomes equal to or greater than a preset torque.

[0018] Operating component 9 is the operating component used to set the preset torque.

[0019] Cover 6 to cover operating component 9. (As shown) Figure 3 As shown, cover 6 includes a first cover 7 and a second cover 8.

[0020] The first cover 7 is removably attached to the housing 2 by rotating it onto the housing 2. The second cover 8 covers the first cover 7.

[0021] In the first state, the second cover 8 is configured to rotate together with the first cover 7. In the second state, the second cover 8 is configured to spin freely on the first cover 7.

[0022] When tool 1 is used for assembly operations on an assembly line in a factory, it is sometimes undesirable for operators to change the preset torque of clutch component 42. In tool 1 according to an embodiment, cover 6 is designed to be removed from housing 2 of tool 1 by rotating the first cover 7. Furthermore, in tool 1, when cover 6 is in the second state, the second cover 8 covering the first cover 7 rotates freely on the first cover 7. That is, when cover 6 is in the second state, operators and others cannot rotate the first cover 7, and therefore cannot remove cover 6 from housing 2. Therefore, allowing operators to use tool 1 with cover 6 in the second state reduces the likelihood of operators changing the preset torque of clutch component 42.

[0023] (2) Details In the following description, reference will be made to Figures 1 to 6 The detailed configuration of tool 1 according to an embodiment is described. In the embodiment, it is assumed that tool 1 is used for assembly operations performed on an assembly line in a factory. It is assumed that tool 1 with cover 6 in a second state is used by an operator.

[0024] According to an embodiment, tool 1 receives power from an external power source via a power cable. Alternatively, tool 1 may receive power from an attached battery pack.

[0025] like Figure 1 As shown, the tool 1 according to the embodiment includes a body 10 and a cover 6. That is, the body 10 is the entire tool 1 except for the cover 6.

[0026] (2.1) Configuration of the main body The main body 10 includes a housing 2, a rod 24, a motor 3, a transmission mechanism 4, an output shaft 5, and an operating component 9 (see reference). Figure 2 Note that in this embodiment, the rotation axis Ax1 parallel to the output axis 5 (see reference) Figure 2 The direction of the output shaft 5 is defined as upward / downward. The direction from the output shaft 5 to the motor 3 is defined as upward, and the direction from the motor 3 to the output shaft 5 is defined as downward.

[0027] The housing 2 has a cylindrical shape extending in the upward / downward direction. As used herein, "cylindrical shape" can refer to a cylindrical shape, an elliptical cylindrical shape, and a rectangular cylindrical shape. The housing 2 includes a first body 21, a second body 22, and a third body 23.

[0028] The first body 21 is formed into a rectangular tube shape with a top surface. The bottom of the first body 21 has a circular opening. The first body 21 houses, for example, a control unit of a motor 3.

[0029] The second body 22 protrudes downward from the bottom end of the first body 21. The second body 22 is formed in a cylindrical shape. The second body 22 houses a part of the transmission mechanism 4 and the motor 3.

[0030] A plurality of protrusions 221 are formed on the outer surface of the second body 22. Each of the plurality of protrusions 221 extends in a direction perpendicular to the upward / downward direction and protrudes outward from the outer surface of the second body. The second body 22 serves as a grip for the operator. When the operator grips the second body 22, the plurality of protrusions 221 provide an anti-slip function.

[0031] The third body 23 protrudes downward from the bottom end of the second body 22. The third body 23 is formed in a cylindrical shape. The third body 23 houses another part of the transmission mechanism 4.

[0032] like Figure 3 As shown, a thread 231 for attaching the cover 6 to the housing 2 (or body 10) is formed at the bottom end of the third body 23.

[0033] A lever 24 is disposed on the outer surface of the first body 21. The lever 24 serves as a switch (or operating member) for controlling the ON / OFF state of the motor 3. The lever 24 can be in an initial position or an ON position. When the lever 24 is pressed or pulled to the ON position by an operator, the motor 3 is activated. The rotational speed of the motor 3 can be adjusted according to how deeply the lever 24 is pulled (or the amount of operation of the lever 24). The tool 1 does not necessarily have a configuration that adjusts the rotational speed of the motor 3 according to how deeply the lever 24 is pulled. That is, instead of having a configuration that adjusts the rotational speed of the motor 3 according to how deeply the lever 24 is pulled, the tool 1 can have a configuration that controls only the ON / OFF state of the motor 3's operation according to how deeply the lever 24 is pulled.

[0034] Motor 3 converts electricity supplied from an external power source into torque. Motor 3 is, for example, an internal rotor type brushless motor. The rotor of motor 3 rotates on the rotation axis Ax1 of the output shaft 5.

[0035] like Figure 1 As shown, the transmission mechanism 4 is arranged below the motor 3 within the internal space of the housing 2 (the second main body 22). The transmission mechanism 4 is used to transmit the torque generated by the motor 3 to the output shaft 5. Figure 2 As shown, the transmission mechanism 4 according to the embodiment includes a reducer mechanism 41 and a clutch member 42. Optionally, the transmission mechanism 4 may include an impact mechanism for applying a rotational impact to the output shaft 5.

[0036] The reducer mechanism 41 is, for example, a planetary gear mechanism. The reducer mechanism 41 converts the rotational speed and torque of the motor 3 into the rotational speed and torque required for the fastening operation.

[0037] When the torque transmitted from the motor 3 to the output shaft 5 becomes equal to or greater than a preset torque, the clutch member 42 switches from a state where it transmits torque to the output shaft 5 to a state where it does not transmit torque to the output shaft 5. The clutch member 42 can be implemented, for example, as an electronic clutch.

[0038] like Figure 2 As shown, the operating member 9 covers the clutch member 42. The operating member 9 is a clutch handle used to set the preset torque of the clutch member 42. The operating member 9 rotates on the rotating shaft Ax1, thereby changing the preset torque of the clutch member 42.

[0039] like Figure 1 As shown, the output shaft 5 is positioned below the transmission mechanism 4. The torque generated by the motor 3 is transmitted to the output shaft 5 via the transmission mechanism 4. The rotation of the rotor of the motor 3 causes the output shaft 5 to rotate on the rotation axis Ax1.

[0040] A front-end tool X1, such as a screwdriver or drill bit, is removably attached to the front end (bottom end) of the output shaft 5. For example, if the screwdriver or drill bit is attached to the output shaft 5, rotating the screwdriver or drill bit in contact with a fastening component (such as a screw) allows for the operation of tightening or loosening the fastening component.

[0041] (2.2) Configuration of the cover like Figure 1 As shown, the cover 6 covers the operating member 9. That is, with the cover 6 attached to the housing 2 (or main body 10), the operator cannot operate the operating member 9. In this way, the cover 6 covering the operating member 9 reduces the possibility that the preset torque can be changed by the operator. Furthermore, the cover 6 according to this embodiment has a configuration that reduces the possibility that the cover 6 can be removed from the housing 2 by the operator. Therefore, the cover 6 according to the embodiment reduces the possibility that the preset torque can be changed by the operator.

[0042] like Figure 4 As shown, the cover 6 includes a first cover 7, a second cover 8, and a connecting member 61. According to an embodiment, the cover 6 has a first state and a second state. Figure 6 As shown, the first state is when the connecting member 61 connects the first cover 7 and the second cover 8 together. Figure 5 As shown, the second state is the state in which the connecting member 61 does not connect the first cover 7 and the second cover 8 together. Note that, according to the embodiment, the first cover 7 and the second cover 8 are not in contact with each other in either the first state or the second state.

[0043] The connecting member 61 connects the first cover 7 and the second cover 8 together. According to Embodiment 1, the connecting member 61 is implemented as a screw. As used herein, "screw" also refers to a bolt.

[0044] According to the embodiment, the connecting member 61 is designed to be inserted into a first hole 74 of the first cover 7 and a second hole 81 of the second cover 8. The connecting member 61 is removably attached to the first cover 7 and the second cover 8. The connecting member 61 is configured to connect the first cover 7 and the second cover 8 together when the connecting member 61 is inserted into the first hole 74 and the second hole 81. That is, the state in which the connecting member 61 is inserted into the first hole 74 and the second hole 81 is defined as the first state of the cover 6. Conversely, the state in which the connecting member 61 is not inserted into the first hole 74 or the second hole 81 is defined as the second state of the cover 6. Inserting the connecting member 61 into the first hole 74 and the second hole 81 and removing the connecting member 61 from the first hole 74 and the second hole 81 is performed, for example, by a supervisor on the assembly line.

[0045] According to the embodiment, the connecting member 61 is removably attached to the first cover 7 and the second cover 8 (i.e., cover 6). Therefore, assembly line supervisors or the like can remove the connecting member 61 from cover 6 in advance, which allows for a reduction in the possibility of operators changing the preset torque.

[0046] The first cover 7 includes a main body 70 and a supporting component 71.

[0047] The body 70 according to the embodiment is made of synthetic resin. Alternatively, the body 70 can be made of a metal such as iron or aluminum. The body 70 is designed to be removably attached to the housing 2 by rotating the body 70 onto the threads 231 of the housing 2. The body 70 is cylindrical in shape. That is, the first cover 7 is cylindrical in shape. The body 70 has an outer surface 72, an inner surface 73, and a first hole 74. That is, the first cover 7 has a first hole 74. The first hole 74 is a hole that penetrates the body 70 in a direction perpendicular to the rotation axis Ax1. The first hole 74 need not be a through hole, but can be a recess. The connecting member 61 is inserted into the first hole 74.

[0048] A first recess 721 is formed in the outer surface 72. In other words, the body 70 of the first cover 7 has the first recess 721. The first recess 721 is a recess formed along the circumference of the outer surface 72 in the entire circumference of the body 70. A support member 71 is fitted into the first recess 721. The first recess 721 has a support member 71 supported by the body 70.

[0049] The support member 71 supports the second cover 8 in such a manner that the second cover 8 is prepared to rotate freely on the first cover 7. According to this embodiment, the support member 71 is a component separate from the main body 70. Since the support member 71 is a component separate from the main body 70, the main body 70 and the support member 71 can, for example, be made of different materials.

[0050] According to this embodiment, the support member 71 is a C-ring. This allows for relatively easy configuration to support the second cover 8 in a manner that prepares it to rotate freely on the first cover 7. The support member 71 is fitted into the first recess 721 of the body 70 and the second recess 831 of the second cover 8.

[0051] A thread 731 is formed at the upper end of the inner surface 73. The thread 731 is a thread that engages with the thread 231 of the housing 2.

[0052] The second cover 8 includes a main body 80 and an insertion nut 84.

[0053] The body 80 according to the embodiment is made of synthetic resin. Alternatively, the body 80 can be made of a metal such as iron or aluminum. The body 80 is cylindrical in shape. That is, the second cover 8 is cylindrical in shape. The body 80 has a second hole 81, an outer surface 82, and an inner surface 83. That is, the second cover 8 has a second hole 81. The second hole 81 is a hole that penetrates the body 80 in a direction perpendicular to the rotation axis Ax1. The connecting member 61 is inserted into the second hole 81. Specifically, the insertion nut 84 is inserted into the second hole 81 according to the embodiment, and the connecting member 61 is inserted into the insertion nut 84.

[0054] A second recess 831 is formed in the inner surface 83. In other words, the body 80 of the second cover 8 has the second recess 831. The second recess 831 is a recess formed along the circumference of the inner surface 83. According to the embodiment, the second recess 831 includes two ends on the circumference of the inner surface 83. In other words, the second recess 831 according to the embodiment is formed in a C-shape. A support member 71 is fitted into the second recess 831. The support member 71 is fitted into the second recess 831, which has a second cover 8 supported by the support member 71.

[0055] The insert nut 84 is made of a metal such as iron or aluminum. The insert nut 84 is inserted into the second hole 81. Additionally, the connecting member 61 is inserted into the insert nut 84. A thread 841 is formed in the insert nut 84. In other words, the second cover 8 includes a thread 841. The thread 841 engages with the threaded connection of the connecting member 61, which is implemented as a screw.

[0056] The second cover 8 includes a thread 841 that secures the connecting member 61 to the second cover 8 (or cover 6). Additionally, the thread 841 is provided in an insert nut 84, which allows the connecting member 61, implemented as a screw, to be secured to the second cover 8 (or cover 6) made of, for example, synthetic resin.

[0057] As described above, the tool 1 or cover 6 according to the embodiment allows for a reduction in the possibility of operators changing the preset torque.

[0058] (3) Variations Next, variations of the typical embodiments will be listed one by one.

[0059] In the above embodiment, it is assumed that the connecting member 61 is implemented as a screw. Alternatively, the connecting member 61 may be a member such as a pin that can be inserted into the first hole 74 of the first cover 7 and the second hole 81 of the second cover 8.

[0060] In the above embodiment, it is assumed that the thread 841 of the second cover 8 is formed in the inner surface of the insertion nut 84. However, the second cover 8 does not necessarily have an insertion nut. Alternatively, the thread 841 may be formed in the second hole 81 of the second cover 8. Alternatively, the thread 841 may be formed in the first hole 74 of the first cover 7. Alternatively still, the first cover 7 and the second cover 8 do not necessarily have the thread 841.

[0061] In the above embodiment, it is assumed that the support member 71 is a C-ring. However, the support member 71 only needs to be configured to support the second cover 8 in such a way that the second cover 8 is ready to swivel freely on the first cover 7. In an alternative example, the support member 71 may be a ball bearing.

[0062] like Figure 7 As shown, the first cover 7 may include a support member 71A instead of a support member 71. The support member 71A is formed on the outer surface 72 of the body 70 of the first cover 7. The support member 71A is a protrusion formed along the circumference of the outer surface 72 on the entire circumference of the body 70. For example, a second recess 832 of the second cover 8 hooks onto the support member 71A of the first cover 7, thereby supporting the second cover 8 in a manner that the second cover 8 is ready to freely rotate on the first cover 7. The second recess 832 is formed in the inner surface 83 of the body 80 of the second cover 8. The second recess 832 is a recess formed along the circumference of the inner surface 83 on the entire circumference of the body 80.

[0063] Tool 1 can also be configured to switch the on / off state of the operation of motor 3 when the front tool X1 is pressed against motor 3.

[0064] In the above embodiments, it is assumed that tool 1 is implemented as an electric screwdriver. However, this should not be construed as limiting. Alternatively, tool 1 can be implemented as, for example, an impact screwdriver, an impact wrench, a nut tightening machine, or a hydraulic pulse wrench. Tool 1 is not limited to electric tools, but can be a pneumatic tool including an air motor (drive unit) activated by compressed air (power) supplied from an air compressor used as the drive source.

[0065] The cover 6 according to the embodiment can be independently circulated in the market. That is, the cover 6 used for the tool 1 according to the above embodiment can be independently circulated in the market.

[0066] (Summary) As can be seen from the above embodiments and their variations, the tool (1) according to the first aspect includes an output shaft (5), a motor (3), a housing (2), a clutch member (42), an operating member (9), and a cover (6). A front-end tool (X1) is attached to the output shaft (5). The movement of the motor (3) causes the output shaft (5) to rotate. The clutch member (42) is configured to switch from a torque transmission state (where the torque transmitted from the motor (3) to the output shaft (5) to a disengaged state (where the clutch member (42) does not transmit torque to the output shaft (5)) when the torque transmitted from the motor (3) to the output shaft (5) becomes equal to or greater than a preset torque. The operating member (9) is the operating member used to set the preset torque. The cover (6) covers the operating member (9). The cover (6) includes a first cover (7) and a second cover (8). The first cover (7) is removably attached to the housing (2) by rotating it onto the housing (2). The second cover (8) covers the first cover (7). The second cover (8) is configured to be ready to rotate together with the first cover (7) in the first state. The second cover (8) is configured to be ready to spin freely on the first cover (7) in the second state.

[0067] This aspect reduces the likelihood that operators will need to change the preset torque.

[0068] In the tool (1) according to the second aspect, which can be implemented in conjunction with the first aspect, the cover (6) further includes a connecting member (61). The connecting member (61) is configured to connect the first cover (7) and the second cover (8) together. A first state is defined as the state in which the connecting member (61) connects the first cover (7) and the second cover (8) together. A second state is defined as the state in which the connecting member (61) does not connect the first cover (7) and the second cover (8) together.

[0069] In the tool (1) according to the third aspect, which can be implemented in conjunction with the second aspect, the first cover (7) has a first hole (74). The second cover (8) has a second hole (81). A connecting member (61) is removably attached to the first cover (7) and the second cover (8). With the connecting member (61) inserted into the first hole (74) and the second hole (81), the connecting member (61) connects the first cover (7) and the second cover (8) together.

[0070] This aspect allows for a further reduction in the likelihood of operators altering the preset torque.

[0071] In the tool (1) according to the fourth aspect, which can be implemented in conjunction with the third aspect, the connecting member (61) is implemented as a screw. The second cover (8) includes threads (841) that engage with the screw (connecting member 61).

[0072] This aspect allows the connecting member (61) to be fixed to the second cover (8).

[0073] In the tool (1) according to the fifth aspect, which can be combined with the fourth aspect, the thread (841) of the second cover (8) is formed in the insert nut (84) inserted into the second hole (81).

[0074] This allows the connecting member (61), which will be implemented as a screw, to be fixed to a second cover (8) made of, for example, synthetic resin.

[0075] In the tool (1) according to the sixth aspect, which can be implemented in combination with any of the first to fifth aspects, the first cover (7) includes a support member (71; 71A). The support member (71; 71A) supports the second cover (8) in such a way that the second cover (8) is prepared to rotate freely on the first cover (7).

[0076] In the tool (1) according to the seventh aspect, which can be implemented in conjunction with the sixth aspect, the first cover (7) also includes a body (70). The body (70) is removably attached to the housing (2) by rotating the body (70) onto the housing (2). The body (70) of the first cover (7) has a cylindrical shape. The body (70) of the first cover (7) has a first recess (721). The second cover (8) has a cylindrical shape. The second cover (8) has a second recess (831). The first recess (721) is formed in the outer surface (72) of the body (70). The second recess (831) is formed in the inner surface (83) of the second cover (8). The support member (71) is a member separate from the body (70) and is fitted into the first recess (721) of the body (70) and the second recess (831) of the second cover (8).

[0077] According to this, the main body (70) and the supporting components (71) can be made of different materials.

[0078] In the tool (1) according to the eighth aspect, which can be realized in conjunction with the seventh aspect, the support member (71) of the first cover (7) is a C-shaped ring.

[0079] This allows for the second cover (8) to be supported in a relatively easy configuration so that the second cover (8) is ready to spin freely on the first cover (7).

[0080] The constituent elements of aspects other than the first aspect are not necessary components of tool (1) and can be appropriately omitted.

[0081] The cover (6) of the ninth aspect is used as the cover (1) of any of the first to eighth aspects.

[0082] This aspect reduces the likelihood that operators will need to change the preset torque. Explanation of reference numerals in the attached figures

[0083] 1 tool 2 shells 3 motors 42 Clutch Components 5 output shafts 6 lids 61 Connecting component (screw) 7 First Cover 70 main bodies 72 outer surface 721 first recess 71 Supporting Component (C-ring) 71A Support Component 74 First Hole 8 Second cover 81 Second Hole 83 inner surface 831 Second recess 84 Insert Nut 841 thread 9 Operating components X1 Front-end Tools

Claims

1. A tool comprising: case; The output shaft, the front-end tool will be attached to the output shaft; The motor, the movement of which causes the output shaft to rotate; A clutch component is configured to switch from a transmission state to a disengagement state when the torque transmitted from the motor to the output shaft becomes equal to or greater than a preset torque. The transmission state is when the clutch component transmits the torque to the output shaft, and the disengagement state is when the clutch component does not transmit the torque to the output shaft. An operating component is used to set the preset torque; as well as A cover that covers the operating component. The cover includes: A first cover, which is removably attached to the housing by rotating the first cover onto the housing, and A second cover covers the first cover, the second cover being configured to be ready to rotate together with the first cover in a first state, and the second cover being configured to be ready to spin freely on the first cover in a second state.

2. The tool according to claim 1, wherein, The cover also includes a connecting member configured to connect the first cover and the second cover together. The first state is defined as the state in which the connecting member connects the first cover and the second cover together, and The second state is defined as the state in which the connecting member does not connect the first cover and the second cover together.

3. The tool according to claim 2, wherein, The first cover has a first hole. The second cover has a second hole, and The connecting component: Removably attachable to the first cover and the second cover, and With the connecting member inserted into the first hole and the second hole, the first cover and the second cover are connected together.

4. The tool according to claim 3, wherein, The connecting member is implemented as a screw, and The second cover includes threads that engage with the screw.

5. The tool according to claim 4, wherein, The threads of the second cover are formed in the insert nut that is inserted into the second hole.

6. The tool according to any one of claims 1 to 5, wherein, The first cover includes a support member that supports the second cover in such a manner that the second cover is ready to swivel freely on the first cover.

7. The tool according to claim 6, wherein, The first cover also includes a body that is removably attached to the housing by rotating the body onto the housing. The main body of the first cover has a cylindrical shape. The main body of the first cover has a first recess. The second cover has a cylindrical shape and a second recess. The first recess is formed in the outer surface of the body. The second recess is formed in the inner surface of the second cover, and The support member is a separate member from the main body and is assembled into the first recess of the main body and the second recess of the second cover.

8. The tool according to claim 7, wherein, The supporting member of the first cover is a C-shaped ring.

9. A cover for use as a cover for a tool according to any one of claims 1 to 8.

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