DRIVE TOOL

Abstract

A driving tool (1) has a holder (39) attached to a wheel (33), lubricant reservoirs (42) on the holder (39), magnets (40) for detecting the rotational position of the wheel (33), and lubricant flow passages (G1, G2) for the flow of lubricant (G). The holder (39) is rotatably integrated with the wheel (33). The lubricant (G) in the lubricant reservoir (42) flows to a bearing hole (33g) via an inclined surface (45a) of a wall (45), an opening hole (47), an extension groove (33f), and a penetration groove (33h).

Description

[0001] The present disclosure relates generally to a driving tool (also called a nailer or stapler) for driving a driving component, such as a nail or a staple, into a workpiece, such as a wood material.

[0002] For example, JP 6 780 772 B2 and JP 2022 - 118 835 A disclose a driving tool comprising a piston that moves in a driving direction using a pressurized gas, and also a driver combined with the piston to drive a component, such as a nail or staple. The driver, having reached a lower end position in the driving direction, returns upward to a ready position due to the rotation of a wheel driven by a motor. The driver is provided with a plurality of engagement teeth along the driving direction. The driver returns upward from the lower end position to the ready position through the successive engagement of the plurality of engagement teeth of the driver with engagement areas of the rotating wheel.

[0003] To ensure the durability of the drive tool, it is necessary to apply an adequate amount of lubricant to the engagement areas of the wheel that mesh with the drive tool's teeth. JP 6 780 772 B2 discloses a lubricant-impregnated material for applying a lubricant to the engagement areas. Furthermore, JP 2022-118 835 A discloses a lubricant reservoir for applying a lubricant to the engagement areas. However, there is a need for a further configuration capable of applying an adequate amount of lubricant to achieve even better durability of the wheel's engagement areas.

[0004] The above-mentioned problem is solved by a driving tool according to claim 1 or according to claim 11.

[0005] According to one aspect of the present disclosure, a driving tool comprises a driver that moves in a driving direction to drive in a component to be driven in, and a wheel having a plurality of engagement areas that engage with the driver. The driving tool also comprises an electric motor that rotates the wheel to move the driver in a direction opposite to the driving direction over the plurality of engagement areas. The driving tool also comprises a holder attached to the wheel, and a lubricant reservoir is formed in the holder. The driving tool also comprises a lubricant flow passage that connects the lubricant reservoir and at least one of the plurality of engagement areas, which is engaged with the driver in a ready position.

[0006] This configuration allows an adequate amount of lubricant to be stored in the lubricant reservoir within the holder. At least when the drive pin is in a ready position, the lubricant flows from the reservoir through the lubricant passage to the engagement area where the drive pin is engaged. Consequently, an adequate amount of lubricant can be supplied to the engagement area, thereby improving the wheel's durability.

[0007] According to another aspect of the present disclosure, a driving tool comprises a driver that moves in a driving direction to drive in a component to be driven in, and a wheel having a plurality of engagement areas for engagement with the driver. The driving tool also comprises an electric motor that rotates the wheel over the plurality of engagement areas to move the driver in a direction opposite to the driving direction. The driving tool also comprises a holder attached to the wheel that includes a lubricant reservoir. The driving tool also comprises a magnet arranged on the holder for detecting rotation of the wheel.

[0008] Due to this configuration, the lubricant reservoir is integrated into the holder on which the magnet for detecting the wheel's rotational position is located. An adequate quantity of lubricant is stored in the lubricant reservoir within the holder. The lubricant in the reservoir flows to the engagement area. Consequently, an adequate amount of lubricant can be supplied to the engagement area, thereby improving the wheel's durability.

[0009] Additional tasks, features and advantages of embodiments of the present teachings will be more easily understood after reading the following detailed description together with the claims and the following accompanying drawings: Fig. Figure 1 is a left side view of a driving tool according to an exemplary embodiment of the present disclosure. Fig. 2 is a cross-sectional view along line II-II in Fig. Figure 1 shows a longitudinal cross-sectional view of a tool body. In this figure, a driver is in a ready position. Fig. Figure 3 is a right-side view of the driving tool. This figure shows a state in which one right-side housing half is removed from the main tool body, exposing the interior of the main tool body. Fig. Figure 4 is a right side view of a lifting mechanism. Fig. Figure 5 is a perspective view of the lifting mechanism. Fig. Figure 6 is a perspective exploded view of the lifting mechanism. Fig. Figure 7 is a perspective view of a holder, seen from a front surface side of the same. Fig. Figure 8 is a perspective view of a wheel, seen from a rear surface side of the same. Fig. Figure 9 is a perspective view of the wheel, seen from a direction indicated by an arrow IX in Fig. 8 is displayed. Fig. Figure 10 is a longitudinal cross-sectional view of a first lubricant flow passage. Fig. Figure 11 is a longitudinal cross-sectional view of a second lubricant flow passage.

[0010] The detailed description that follows, with reference to the attached drawings, is intended to be a description of exemplary embodiments of the present disclosure and is not intended to be limiting and / or to represent only the embodiments in which the present disclosure can be carried out. The term "exemplary," used throughout this description, means "serving as an example, application, or illustration" and should not necessarily be considered preferred or advantageous over other exemplary embodiments. The detailed description includes specific details for the purpose of providing a consistent understanding of the exemplary embodiments of the disclosure.It is evident to the person skilled in the art that the exemplary embodiments of the disclosure can be carried out without these specific details. In some applications, the specific details relate to known structures, components and / or devices shown in block diagram form to avoid obscuring significant aspects of the exemplary embodiments presented herein.

[0011] According to another aspect of the present disclosure, the wheel has bearing holes for introducing the plurality of engagement areas, and the lubricant flow passage has a first lubricant flow passage having an extension groove arranged on an outer surface of the wheel, opposite the holder and extending from one of the bearing holes. Because of this configuration, the lubricant in the lubricant reservoir is supplied to the bearing hole via the extension groove.

[0012] According to another aspect of the present disclosure, the extension groove extends in an arc shape centered on a rotational center of the wheel. Furthermore, the first lubricant flow path has a penetration groove for the lubricant to penetrate the wheel from the extension groove along an inner circumferential surface of the bearing bore. Because of this configuration, the lubricant can be reliably supplied to the bearing bore via the penetration groove.

[0013] According to another aspect of the present disclosure, the wheel has bearing holes for introducing the plurality of engagement areas. Furthermore, the lubricant flow passage has a second lubricant flow passage comprising a recess formed on an outer surface of the wheel opposite the holder and a first connecting hole connected to the recess. The first connecting hole is open towards one of the plurality of engagement areas. Because of this configuration, the lubricant in the lubricant reservoir can be supplied to the bearing hole via the recess and the first connecting hole, which serve as a second flow passage.

[0014] According to another aspect of the present disclosure, an inclined surface is formed at a circumferential end of the lubricant reservoir such that it is inclined relative to a depth direction of the lubricant reservoir. The inclined surface extends along the lubricant flow passage. Due to this configuration, the lubricant in the lubricant reservoir flows readily along the inclined surface into the lubricant flow passage.

[0015] According to another aspect of the present disclosure, the holder has a magnet for detecting the rotational position of the wheel. Because of this configuration, the holder can detect the rotational position using the magnet.

[0016] According to another aspect of the present disclosure, the driving tool further comprises a cover between the wheel and the holder for covering the lubricant reservoir. The cover has a hole that forms part of the lubricant flow passage for the lubricant to flow to one of the multiple engagement areas. Due to this configuration, the lubricant in the lubricant reservoir is supplied to the engagement area of ​​the wheel via the hole in the cover.

[0017] According to another aspect of the present disclosure, the cover has an opening hole that is open to the extension groove of the wheel. The opening hole is part of the first lubricant flow path for the lubricant to flow to the extension groove. Due to this configuration, the lubricant in the lubricant reservoir flows to the extension groove via the opening hole, which forms part of the first lubricant flow path.

[0018] According to another aspect of the present disclosure, the cover has a second connecting hole that is open to the recess of the wheel, and the second connecting hole is part of the second lubricant flow passage for lubricant flowing to the recess. Because of this configuration, the lubricant in the lubricant reservoir flows to the recess via the second connecting hole, which forms part of the second lubricant flow passage.

[0019] According to a further aspect of the present disclosure, the cover has an opening hole that is open to the extension groove of the wheel and forms part of the first lubricant flow path, and also has a second connecting hole that is open to the recess of the wheel and forms part of the second lubricant flow path. Because of this configuration, the lubricant in the lubricant reservoir flows not only to the opening hole that forms part of the first lubricant flow path, but also to the second connecting hole that forms part of the second lubricant flow path.

[0020] A driving tool 1 according to an exemplary embodiment of the present disclosure is described with reference to Fig. 1 to 11 are described. In this embodiment, a gas spring-like driving tool 1 is described by way of example as the driving tool 1. The gas spring-like driving tool 1 uses the pressure of a gas (elastic material or fluid) that is filled in a storage chamber 14 above a cylinder 12 as a driving force for driving in a driving component t. The driving component t is in the form of a rod, such as a nail. In the following description, a driving direction of the driving component t is a downward direction. A direction opposite to the driving direction is an upward direction. Fig. 1. The user is located at the rear of the driving tool 1 (on one side of the handle 3). The side opposite the user is referred to as the front. A left / right side is based on the user's position.

[0021] As in Fig. As shown in Figures 1 to 3, the driving tool 1 has a main tool body 10. The main tool body 10 has a main body housing 11 made of synthetic resin. The main body housing 11 has a left-right split structure, in which a left-hand housing half 11L faces a right-hand housing half 11R and is screwed together. The main body housing 11 accommodates a cylinder 12. The cylinder 12 accommodates a piston 13, which is movable in an up-down direction. A driving element 2, extending downwards, is combined with the center of a lower surface of the piston 13. A lower portion of the driving element 2 enters within a driving passage 16c, as described later. An upper portion of the cylinder 12 above the piston 13 communicates with a storage chamber 14. A compressed gas, such as air, is filled into storage chamber 14.The pressure of the gas that is filled into the storage chamber 14 is applied to an upper surface of the piston, which pressure serves as a driving force.

[0022] A nose 15 is formed on a lower region of the main tool body 10. The nose 15 has a driver guide 16 and a contact arm 17. The driver guide 16 has a front driver guide 16a on a front side and a rear driver guide 16b on a rear side. The front driver guide 16a is connected to the rear driver guide 16b to form the driver guide 16. A driver passage 16c is formed between the front driver guide 16a and the rear driver guide 16b. The driver passage 16c communicates with an inner circumferential side of the cylinder 12. The driver 2 enters within the driver passage 16c, so that it is moved back and forth in the up-down direction.

[0023] The contact arm 17 is mounted such that it is movable in the up-down direction around the driver guide 16. The contact arm 17 extends upwards from a lower end (an ejection opening 18) of the driver guide 16. As shown in Fig. 3 and Fig. As shown in Figure 4, the contact arm 17 is biased downwards by a compression spring 17b towards one side of an off position. In the off position, a lower portion of the contact arm 17 is located below the ejection opening 18.

[0024] A pressing action of a shift lever 4 becomes effective when the contact arm 17 is moved relatively upwards with respect to a workpiece W (the contact arm 17 is actuated). An adjusting wheel 17a for adjusting the insertion depth is provided below a compression spring 17b. The out position of the contact arm 17 can be adjusted in the up-down direction by rotating the adjusting wheel 17a. This adjustment changes the stroke of the contact arm 17, thereby adjusting the position of the ejection opening 18 with respect to the workpiece W. In other words, the insertion depth of the insertion component t with respect to the workpiece W can be changed.

[0025] As in Fig. As shown in Figure 1, a magazine 20 is combined with a rear surface of the nose 15. The magazine 20 is loaded with a plurality of drive-in components t. The magazine 20 has a magazine main body 21, which receives a plurality of drive-in components t, and a pushing device 24, which pushes the plurality of drive-in components t towards the drive-in passage 16c in the nose 15. A drive-in component t, which has been pushed by the pushing device 23 and fed within the drive-in passage 16c, is driven in by the drive-in driver 2, which moves downwards, thereby ejecting the drive-in component t from the ejection opening 18.

[0026] A handle 3 for a user to hold is formed on a rear surface of the main tool body 10. The handle 3 has a two-part structure (half-construction) in which a left handle housing 3L and a right handle housing 3R, which are integrally formed with the main body housing 11, are opposite each other and screwed together. The actuating lever 4 for activating the driving tool 1 is provided on a front surface of the handle 3. The actuating lever 4 is actuated by the user's fingertip. As shown in Fig. As shown in Figure 3, a switch body 4a is arranged above the switching lever 4. When the switching lever 4 is pushed upwards, the switch body 4a is switched on. When the switch body 4a is switched on, power is supplied to a lifting mechanism 30. The lifting mechanism 30 will be described in detail later.

[0027] As in Fig. As shown in Figure 3, a battery mounting area 5 is formed on a rear side of the handle 3. A battery 6 is attached to the battery mounting area 5. The battery 6 is moved downwards to attach to the battery mounting area 5. Conversely, the battery 6 is moved upwards to remove it from the battery mounting area 5. The battery 6, once removed from the battery mounting area 5, can be recharged for repeated use by an associated charger. The battery 6 can be used with other driving tools. An electric motor 31 of the lifting mechanism 30 is driven by the battery 6 as a power source.

[0028] As in Fig. As shown in Figure 3, a rectangular, plate-shaped control unit 8 is integrated into the battery mounting area 5. The control unit 8 is arranged such that it extends in the top-bottom direction along a front surface of the battery 6. When both the shift lever 4 and the contact arm 17 are actuated, the lifting mechanism 30 is activated to initiate a driving operation of the driving tool 1. The control unit 8 primarily controls the lifting mechanism 30, specifically the electric motor 31.

[0029] As in Fig. As shown in Figure 2, a lower end damper 19 is arranged on a lower region of the cylinder 12 to dampen a shock of the piston 13 in its lower end position. A lower region of the driver 2 enters the driving passage 16c through an inner circumferential side of the lower end damper 19. The driver 2 moves downward within the driving passage 16c by the pressure of the gas filled into the storage chamber 14, which is applied to the upper surface of the piston 13. A pointed end (lower end) of the driver 2, moving downward within the driving passage 16c, drives in a driving component t, which is fed within the driving passage 16c. The driving component t, driven in by the driver 2, is ejected from the ejection opening 18. The ejected driving component t is driven into the workpiece W.

[0030] The lifting mechanism 30 is located below the handle 3. The lifting mechanism 30 incorporates the electric motor 31. A wheel 33 is mounted on the front of the electric motor 31 via a reduction gear 32. The wheel 33 is covered by a mechanism housing 35. The drive 2, having reached its lower end position, moves upwards (in a direction opposite to the driving direction of the drive component t) together with the piston 13 to a ready position through the lifting mechanism 30. The wheel 33 is mounted by an output shaft 32a of the reduction gear 32. The wheel 33 rotates in a direction indicated by an arrow R. Fig. 2 is shown (counterclockwise in this figure). This rotation of the wheel 33 moves the drive 2 upwards (returns) (in a direction opposite to the driving direction).

[0031] As in Fig. As shown in Figure 2, the driver 2 has, for example, nine engagement teeth 2a, which are formed on one right side of the driver 2. Each of the engagement teeth 2a has a rack-like shape that projects to the right. A majority of the engagement teeth 2a are arranged at equal intervals in one longitudinal direction of the driver 2 (in the top-bottom direction). The wheel 33 of the lifting mechanism 30 successively engages with the majority of engagement teeth 2a.

[0032] As in Fig. As shown in Figure 2, the wheel 33 is located on the right side of the driver 2. The wheel 33 has, for example, nine engagement areas 34 that successively engage with the engagement teeth 2a of the driver 2. A cylindrical shaft component is used for each of the engagement areas 34. The nine engagement areas 34 are arranged at equal intervals along an outer circumferential edge of the wheel 33. A rotation of the wheel 33 in a direction indicated by the arrow R causes a first engagement area 34F of the wheel 33 to engage with an uppermost engagement tooth 2a of the driver 2, which has reached its lower end position. A final engagement area of ​​the wheel 33, which engages with a lowermost engagement tooth 2a of the driver 2, is designated as an engagement area 34E. Intervention areas 34F and 34E are used to distinguish these from other intervention areas 34, if necessary.The last engagement area 34E engages with the engagement tooth 2a of the driver 2 when the driver 2 is in the ready position. When the driver 2 moves upwards from the ready position to an upper end position, the engagement area 34E disengages from the engagement tooth 2a. At this point, a significant load (force) is applied to the last engagement area 34E. Due to this configuration, it is particularly necessary to apply an adequate amount of lubricant to the last engagement area 34E to ensure its durability.

[0033] The wheel 33 rotates in the direction indicated by arrow R by activating the electric motor 31. After the driver 2 reaches the lower end position for driving in a drive component t, the wheel 33 continues to rotate in the direction indicated by arrow R to cause the engagement areas 34 to successively engage with the engagement teeth 2a from below, thereby moving the driver 2 upwards. As the piston 13 moves upwards through the lifting mechanism 30, the pressure of the gas filled in the storage chamber 14 increases. When the driver 2 reaches the ready position indicated in Fig. When the electric motor 31 stops, as shown in Figure 2, the electric motor 31 returns to a position where the last engagement area 34E is engaged with the engagement tooth 2a of the driver 2. In this state, a driving process is completed.

[0034] When the shift lever 4 is pressed again, the lifting mechanism 30 is reactivated. When the lifting mechanism 30 is activated, the wheel 33 begins to rotate in the direction indicated by the arrow R to move the driver 2 and the piston 13 upwards from their ready position, thereby disengaging the last engagement area 34E of the wheel 33 from the engagement tooth 2a of the driver 2.

[0035] For example, in Fig. As shown in Figure 2, a large area is formed between the first engagement area 34F and the last engagement area 34E in a direction of rotation of the wheel 33 indicated by arrow R. This area is also referred to as a relief area 33a, which has no engagement areas 34. When the wheel 33 rotates in the direction indicated by arrow R, causing the relief area 33a to be opposite one side of the driver 2, the engagement of the wheel 33 with the engagement teeth 2a of the driver 2 is disengaged. As a result, the driver 2 and the piston 13 move downwards without interference with the engagement areas 34 due to the pressure of the gas filled into the storage chamber 13, which is applied to an upper surface of the piston 13. As the driver 2 moves downwards through the driving passage 16c, the driver 2 drives the driving component t into the workpiece W.

[0036] As in Fig. As shown in Figure 4, the electric motor 31, the reduction gear train 32, and the wheel 33 are arranged coaxially around a motor shaft axis J. A cooling fan wheel 31a is mounted on an output shaft of the electric motor 31. The reduction gear train 32 comprises a three-stage planetary gear train. The wheel 33 is mounted by an output shaft 32a of the three-stage planetary gear train.

[0037] As in Fig. 5, Fig. 6, and Fig. As shown in Figure 8, the wheel 33 has a front flange 33b on a front side and a rear flange 33c on a rear side. The front flange 33b and the rear flange 33c are integrally connected to each other via a cylindrical connecting element 33d. The front flange 33b and the rear flange 33c are arranged parallel to each other. A circumferential edge of the front flange 33b extends radially from the connecting element 33d. Similarly, a circumferential edge of the rear flange 33c extends radially from the connecting element 33d. The nine engagement areas 34 are arranged between the circumferential edge of the front flange 33b and the circumferential edge of the rear flange 33c. One end of the engagement area 34 is supported by the front flange 33b, and the other end is supported by the rear flange 33c. As shown in Figure 8, the engagement area 34 is supported by the front flange 33b. Fig. As shown in Figure 8, both ends of each engagement area 34 are inserted into bearing holes 33g formed in the front flange 33b and the rear flange 33c, so that the engagement areas 34 are supported by the front and rear flanges 33b, 33c.

[0038] As in Fig. As shown in Figure 2, the nine engagement areas 34 are arranged at substantially equal intervals around the motor shaft axis J. Compared to the equal intervals of the nine engagement areas 34, the distance between the first engagement area 34F and the last engagement area 34E in the circumferential direction, i.e., the length of the relief area 33a in the circumferential direction, is large. Referring to Fig. 6, an oval bearing hole 33e is formed in a central region of the connecting component 33d. The output shaft 32a of the reduction gear train 32 is inserted into the bearing hole 33e. A flat section 32b of the output shaft 32a is inserted into the bearing hole 33e. Due to this configuration, the wheel 33 rotates integrally with the output shaft 32a about the motor shaft axis J. Furthermore, the wheel 33 is mounted such that it is displaceable in a specific region in a radial direction perpendicular to the motor shaft axis J with respect to the output shaft 32a, see Fig. 2 and Fig. 6.

[0039] Referring to Fig. 6. A front section 32c of the output shaft 32a is rotatably mounted by a front bearing plate 37 via a bearing 36. The front bearing plate 37 is screwed to a front section of the mechanism housing 35. The front section of the mechanism housing 35 is covered by the front bearing plate 37.

[0040] As in Fig. 5 and Fig. As shown in Figure 6, a cover 38 is mounted on one side of a rear surface of the wheel 33. A holder 39 is mounted on one side of a rear surface of the cover 38. The cover 38 and the holder 39 are circular in shape. The cover 38 is held by the wheel 33 and the holder 39. A circular protective plate 39a is in contact with a rear surface of the holder 39. A rear section 32d of the output shaft 32a projects from the protective plate 39a. A retaining ring 39b is attached to the rear section 32d. Due to this configuration, the wheel 33, the cover 38, and the holder are mounted such that they are not displaceable relative to each other in the axial direction with respect to the output shaft 32a. The plane area 32b of the output shaft 32a is inserted into the bearing hole 33e of the wheel 33, a bearing hole 38a of the cover 38 and a bearing hole 39c of the holder 39.Accordingly, the wheel 33, the cover 38 and the holder 39 rotate integrally with the output shaft 32a.

[0041] As in Fig. As shown in Figure 7, a plurality of recesses are formed on a front surface of the holder 39. The plurality of recesses have three lubricant reservoirs 42, 43, 44. An adequate quantity of lubricant G is stored (reserved) in the lubricant reservoirs 42, 43, 44. The lubricant reservoir 42 is located on an outer circumferential side of the holder 39. The lubricant reservoirs 43, 44 are located on an inner circumferential side of the holder 39. A rear region of the lubricant reservoir 42 in the direction of rotation R is partitioned by an adjacent recess with a wall 45. The wall 45 is located behind the last engagement region 34b in the front-back direction. The relative positional relationship between the last engagement region 34e and the wall 45 does not change.

[0042] The lubricant reservoirs 42, 43, 44 and other recesses are covered by the cover 38. The cover 38 has four small through-holes 38b and two large through-holes 38c, which are arranged symmetrically with respect to a center point of the cover 38. One of the four narrow through-holes 38b of the cover 38 serves as an opening 47, forming part of a lubricant flow passage. As shown in Fig. As shown in Figure 7, the opening hole 47 is positioned on one side near the last engagement area 34E and at the front in the direction of rotation R. The remaining three small through holes 38b serve as blind holes for easy mounting of the holder 39 in the lifting mechanism 30. In other words, the four small through holes 38b, including the opening hole 47, prevent the cover 38 from being aligned during an assembly operation.

[0043] One of the two large through-holes 38c in the cover 38 serves as a connecting hole 48, which communicates with a recess 33i in the wheel 33, as will be described later. The connecting hole 48 forms part of a lubricant flow passage. As in Fig. As shown in Figure 7, the connecting hole 48 is positioned on one side of a wall 46. A cylindrical positioning projection 39d, formed on a front surface of the holder 39, is inserted into the other large connecting hole 38c, which is positioned on one side opposite the connecting hole 48. The two large through holes 38 are arranged symmetrically with respect to the center of the cover 38, thus preventing misalignment of the cover 38 during assembly.

[0044] As in Fig. As shown in Figure 10, the wall 45 has an inclined surface 45a, which is inclined on a front side in the direction of rotation R. The inclined surface 45a is inclined relative to a depth direction of the lubricant reservoir 42. Likewise, the inclined surface 45a is inclined in a downstream direction of the lubricant flow passage (on one side of the opening 47 of the cover 38).

[0045] As in Fig. As shown in Figures 8 to 10, an arc-shaped extension groove 33f is formed on a rear surface of the rear flange 33c of the wheel 33. The extension groove 33f extends from the bearing hole 33g, into which the engagement area 34E is inserted, along the rear surface of the rear flange 33c. Furthermore, as is clearly shown in Fig. As shown in Figure 10, a penetration groove 33h extends from the extension groove 33f along an inner circumferential surface of the bearing hole 33g. The penetration groove 33h passes through the rear flange 33c. The extension groove 33f and the penetration groove 33h serve as a lubricant flow passage.

[0046] As in Fig. As shown in Figure 7, lubricant G flows from the lubricant reservoir 42 to the opening hole 47 via the inclined surface 45a. The lubricant G flowing to the opening hole 47 flows within the bearing hole 33g via the extension groove 33f and the penetration groove 33h. This configuration allows lubrication of the engagement area 34E. The lubricant reservoir 42, the inclined surface 45a of the wall 45, the opening hole 47, the extension groove 33f, the penetration groove 33h, and the bearing hole 33g form a first lubricant flow path G1 for lubricating the engagement area 34E.

[0047] As in Fig. As shown in Figure 7, the two lubricant reservoirs 43, 44 on the inner circumferential side of the holder 39 are separated from each other by the wall 46. As shown in Fig. As shown in Figure 11, the wall 46 has an inclined surface 46a on a front side in the direction of rotation R and an inclined surface 46b on a rear side in the direction of rotation R. The inclined surface 46a and the inclined surface 46b are inclined relative to a depth direction of the lubricant reservoirs 43, 44. Likewise, the inclined surface 46a and the inclined surface 46b are inclined in a downstream direction of a lubricant flow passage (on one side of the connecting hole 48 of the cover 38).

[0048] As in Fig. 8, Fig. 9 and Fig. As shown in Figure 11, an oval recess 33i is formed on a rear surface of the rear flange 33c of the wheel 33. The recess 33i is designed such that it has a depth that reaches the front region of the connecting element 33d but not the front flange 33b. A connecting hole 33j is formed in the center of the recess 33i in a depth direction of the recess 33i. The connecting hole 33j is approximately circular and passes through the connecting element 33d in a radial direction. The connecting hole 33j is open towards the inner circumferential side of the last engagement area 34E.

[0049] As in Fig. As shown in Figure 11, lubricant G flows from the lubricant reservoirs 43, 44 to the connecting hole 48 via the inclined surfaces 46a and 46b. The lubricant G flowing towards the connecting hole 48 flows towards the bearing hole 33g and the final engagement area 34E via the recess 33i and the connecting hole 33j. This configuration enables the lubrication of the engagement area 34E. The lubricant reservoirs 43, 44, the inclined surfaces 46a, 46b of the wall 46, the connecting hole 48, the recess 33i, and the connecting hole 33j form a second lubricant flow path G2 for lubricating the engagement area 34E.

[0050] As in Fig. As shown in Figure 5, two magnets 40 are attached to a lower surface of the holder 39. The two magnets 40 are attached along a circumferential edge of the holder 39. As shown in Fig.As shown in Figure 3, a sensor 41 is attached to an outer surface of the mechanism housing 35. The magnetism of each of the magnets 40 is detected by the sensor 41. Accordingly, the rotational position of the wheel 33 can be determined. A detection signal from the sensor 41 is input to the controller 8.

[0051] According to the configuration described above, the lubricant reservoirs 42, 43, 44 are formed in the holder 39, on which the magnets 40 for detecting the rotational position of the wheel 33 are arranged. An adequate quantity of lubricant G is stored in the lubricant reservoirs 42, 43, 44. The lubricant G flows from the lubricant reservoirs 42, 43, 44 primarily to the engagement area 34E via the first lubricant flow path G1 and the second lubricant flow path G2. Accordingly, an adequate quantity of lubricant G can be applied to and around the engagement area 34E, thereby improving the durability of the wheel 33.

[0052] According to the embodiment described above, the wheel 33 has the bearing hole 33g into which the engagement area 34 is inserted. The first lubricant flow path G1 has the extension groove 33f, which extends from the bearing hole 33g and is formed on the rear surface of the wheel 33, opposite the holder 39. Accordingly, the lubricant G in the lubricant reservoir 42 is applied to the bearing hole 33g, into which the engagement area 34E is inserted, and to the engagement area 34E via the extension groove 33f.

[0053] According to the embodiment described above, the extension groove 33f extends in an arc shape centered on the center of rotation of the wheel 33 (motor shaft axis line J). The first lubricant flow path G1 further comprises the penetration groove 33h, which passes through the wheel 33 from the extension groove 33f to the inner circumferential surface of the bearing hole 33g. Accordingly, the lubricant G can be supplied more reliably to the bearing hole 33g and the engagement area 34E via the penetration groove 33h.

[0054] According to the embodiment described above, the second lubricant flow path G2 has the recess 33i and the connecting hole 33j. The recess 33i is formed on the rear surface of the wheel 33, opposite the holder 39. The connecting hole 33j communicates with the recess 33i and is open towards the engagement area 34E. Accordingly, the lubricant G is applied to the lubricant reservoir 43, 44, the bearing hole 33g, and the engagement area 34E via the recess 33i and the connecting hole 33j, which form the second lubricant flow path G2.

[0055] According to the embodiment described above, the inclined surfaces 45a, 46a, and 46b are each formed at the circumferential ends of the lubricant reservoirs 42, 43, and 44 such that they are inclined relative to the depth direction of the lubricant reservoirs 42, 43, and 44. Likewise, the inclined surface 45a extends along the first lubricant flow path G1, and the inclined surfaces 46a and 46b extend along the second lubricant flow path G2. Accordingly, the lubricant G flows smoothly into the lubricant reservoirs 42, 43, and 44 along the first lubricant flow path G1 and the second lubricant flow path G2 over the inclined surfaces 45a, 46a, and 46b.

[0056] According to the embodiment described above, the holder 39, which rotates integrally with the wheel 33, has a magnet 40 for detecting the rotational position of the wheel 33. Accordingly, the rotational position of the wheel 33 can be detected by the magnet 40. The electric motor 31 is controlled based on the rotational position of the wheel 33.

[0057] According to the embodiment described above, the cover 38 is arranged between the wheel 33 and the holder 39 to cover the lubricant reservoirs 42, 43 and 44. Accordingly, the cover 38 prevents lubricant G from escaping from the lubricant reservoirs 42, 43 and 44.

[0058] According to the embodiment described above, the cover 38 has the opening hole 47, which is open to the extension groove 33f of the wheel 33. The opening hole 47 forms part of the first lubricant flow path G1. Accordingly, the lubricant G in the lubricant reservoir 42 flows to the extension groove 33f via the opening hole 47, which forms part of the first lubricant flow path G1.

[0059] According to the embodiment described above, the cover 38 has the connecting hole 48, which is open to the recess 33i of the wheel 33. The connecting hole 48 forms part of the second lubricant flow path G2. Accordingly, the lubricant flows in the lubricant reservoirs 43 and 44 to the recess 33i via the connecting hole 48, which forms part of the second lubricant flow path G2.

[0060] The driving tool 1 according to the embodiment described above can be modified in various ways. In the embodiment described above, the driving tool 1 has two flow passages, i.e., the first lubricant flow passage G1 and the second lubricant flow passage G2. Instead, the driving tool 1 can have one of the first lubricant flow passage G1 and one of the second lubricant flow passage G2.

[0061] In the embodiment described above, the driving tool 1 has the first lubricant flow passage G1 and the second lubricant flow passage G2, in which the lubricant G flows towards the last engagement area 34E. Alternatively, the driving tool 1 can have further flow passages for applying the lubricant from the lubricant reservoirs to the other engagement areas 34.

[0062] In this embodiment, the lubrication structure described above is applied to a gas spring-like driving tool 1. Alternatively, the lubrication structure can be applied to a driving tool with a mechanical spring, in which a preload force of a compression spring is used for a driving force.

[0063] The driving tool 1 in the embodiment is an example of the driving tool according to one aspect or other aspects of the present disclosure. The driving component t in the embodiment is an example of the driving component according to one aspect or other aspects of the present disclosure. The driver 2 in the embodiment is an example of the driver according to one aspect or other aspects of the present disclosure. The engagement area 34 in the embodiment is an example of the engagement area according to one aspect or other aspects of the present disclosure. The wheel 33 in the embodiment is an example of the wheel according to one aspect or other aspects of the present disclosure.

[0064] The electric motor 31 in the embodiment is an example of an electric motor according to one or more aspects of the present disclosure. The holder 39 in the embodiment is an example of a holder according to one or more aspects of the present disclosure. The magnet 40 in the embodiment is an example of a magnet according to one or more aspects of the embodiment. The lubricant reservoirs 42, 43, 44 in the embodiment are examples of lubricant reservoirs according to one or more aspects of the present disclosure. The first lubricant flow passage G1 and the second lubricant flow passage G2 in the embodiment are examples of lubricant flow passages according to one or more aspects of the present disclosure.

[0065] It is explicitly emphasized that all features disclosed in the description and / or the claims are to be considered separate and independent of one another for the purpose of the original disclosure as well as for the purpose of limiting the claimed invention, irrespective of the combinations of features in the embodiments and / or the claims. It is explicitly stated that all range specifications or specifications of groups of units disclose every possible intermediate value or subgroup of units for the purpose of the original disclosure as well as for the purpose of limiting the claimed invention, in particular also as a boundary of a range specification. QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] JP 6 780 772 B2 [0002, 0003] JP 2022 - 118 835 A [0002, 0003]

Claims

[1] Driving tool (1), with a driver (2) configured to move in a driving direction for driving in a driving component (t), a wheel (33) configured to engage with the driver (2), wherein the wheel (33) has a plurality of engagement portions (34) that engage with the driver (2), an electric motor (31) configured to rotate the wheel (33) to move the driver (2) in a direction opposite to the driving direction over the plurality of engagement areas (34), a holder (39) attached to the wheel (33), at least one lubricant reservoir (42, 43, 44) formed in the holder (39), and at least one lubricant flow passage (G1, G2) configured to connect the at least one lubricant reservoir (42, 43, 44) and at least one engagement portion (34E) of the plurality of engagement portions (34), wherein the at least one engagement portion (34E) of the plurality of engagement portions (34) is engaged with the driver (2) in a standby position. [2] Driving tool (1) according to claim 1, in which the wheel (33) has bearing holes (33g) for inserting the plurality of engagement portions (34), and the at least one lubricant flow passage (G1) comprises a first lubricant flow passage (G1) having an extension groove (33f) disposed on an outer surface of the wheel (33) opposite to the holder (39) and configured to extend from one of the support holes (33g). [3] Driving tool (1) according to claim 2, in which the extension groove (33f) extends in an arc shape centered on a rotation center of the wheel (33), and the first lubricant flow passage (G1) further comprises a penetrating groove (33h) for penetrating the wheel (33) from the extension groove (33f) along an inner peripheral surface of one of the support holes (33g). [4] Driving tool (1) according to one of claims 1 to 3, in which the wheel (33) has bearing holes (33g) for inserting the plurality of engagement portions (34), and the at least one lubricant flow passage (G1) has a second lubricant flow passage (G2) having a recess (33i) arranged on an outer surface of the wheel (33) opposite to the holder (39) and a first communication hole (33j) connected to the recess (33i), wherein the first communication hole (33j) is open toward the at least one (34E) of the plurality of engagement portions (34). [5] Driving tool (1) according to one of claims 1 to 4, wherein the at least one lubricant reservoir (42, 43, 44) has an inclined surface (45a, 46a, 46b) positioned at a circumferential end of the at least one lubricant reservoir (42, 43, 44) so ​​as to be inclined relative to a depth direction of the at least one lubricant reservoir (42, 43, 44) and extending along the at least one lubricant flow passage (G1, G2). [6] Driving tool (1) according to one of claims 1 to 5, wherein the holder (39) has a magnet (40) for detecting a rotational position of the wheel (33). [7] Driving tool (1) according to one of claims 1 to 6, further comprising a cover (38) between the wheel (33) and the holder (39) for covering the lubricant reservoir (42, 43, 44), wherein the cover (38) has at least one hole (38b, 38c, 47, 48) which is a part of the lubricant flow passage (G1, G2) for flowing lubricant to the at least one engagement portion (34E) of the plurality of engagement portions (34). [8] A driving tool (1) according to claim 7 when dependent on claim 2 or 3, wherein the cover (38) has an opening hole (47) configured to be open to the extension groove (33f) of the wheel (33), wherein the opening hole (47) is a part of the first lubricant flow passage (G1) for flowing the lubricant (G) to the extension groove (33f). [9] A driving tool (1) according to claim 7 when dependent on claim 4, wherein the cover (38) has a second communication hole (48) configured to be open to the recess (33i) of the wheel (33), wherein the second communication hole (48) is a part of the second lubricant flow passage (G2) for flowing the lubricant (G) to the recess (33i). [10] Driving tool (1) according to claim 7, when dependent on claim 4, when dependent on claim 2 or 3, in which the cover (38) has an opening hole (47) configured to be open to the extension groove (33f) of the wheel (33), wherein the opening hole (47) is a part of the first lubricant flow passage (G1) for flowing the lubricant (G) to the extension groove (33f), and the cover (38) has a second communication hole 48 configured to be open to the recess (33i) of the wheel (33), wherein the second communication hole (48) is a part of the second lubricant flow passage (G2) for flowing the lubricant to the recess (33i). [11] Driving tool (1), with a driver (2) configured to move in a driving direction for driving in a driving component (t), a wheel (33) configured to engage with the driver (2), wherein the wheel (33) has a plurality of engagement areas (34), an electric motor (31) configured to rotate the wheel (33) to move the driver (2) in a direction opposite to the driving direction over the plurality of engagement areas (34), a holder (39) attached to the wheel (33), wherein the holder (39) has at least one lubricant reservoir (42, 43, 44), and at least one magnet (40) arranged on the holder (39) for detecting a rotational position of the wheel (33).

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