JP5437321B2 - Battery powered tools - Google Patents

Description

  The present invention relates to a battery-type electric tool, and more particularly, a battery-type electric tool that allows a battery pack to be attached and detached by sliding a battery pack, which is a power supply source necessary for the operation of the tool, with respect to a housing. It is about improvement.

2. Description of the Related Art Conventionally, there is known a battery-type electric tool configured such that a battery pack is attached to a housing of an electric tool, and the tool is operated by driving power supplied from the battery pack. Various methods are used for attaching and detaching the battery pack in the battery-type electric tool.

  For example, in the battery-type electric tool described in Patent Document 1 below, the mounting position of the battery pack is set at the lower end of the handle portion provided in the housing, and the battery pack is attached to and detached from the mounting position. It is configured to perform in the direction, that is, in the vertical direction. The attached battery pack is fixed by a latch mechanism provided on the side surface of the battery pack, and the user of the battery-type electric tool operates the latch mechanism while supporting the battery pack, and attaches / detaches the battery pack. It will be.

  Moreover, the thing of the following patent document 2 is known as another battery-type electric tool which concerns on a prior art. In the battery-type electric tool described in Patent Document 2 below, a guide rail is installed on the lower surface of the handle portion provided in the housing, and on the other hand, an overhanging portion is slidable on the upper surface of the battery pack so as to be slidable with the guide rail. is set up. Therefore, the slide movement of the housing and the battery pack is possible by the guide rail and the overhanging portion. The housing to be slidably attached and the battery pack are fixed by a recess provided in the housing and a hook provided in the battery pack so as to be engageable with the recess.

JP 2000-79581 A JP 2001-351593 A

  However, in the battery-type power tool described in Patent Document 1, the housing and the battery pack are connected in the vertical direction, and the battery pack must be fixed by operating a latch mechanism provided on the side of the battery pack. Therefore, the user must attach and detach the battery pack very carefully. That is, in the battery-type electric tool described in Patent Document 1, there is a possibility that the battery-type electric tool may fall if the user does not reliably support the battery pack when the latch mechanism is released.

  On the other hand, in the battery-type power tool described in Patent Document 2, since the housing and the battery pack are attached and detached by sliding movement, there is no concern that the battery pack will drop at the moment when the fixation is released. However, since the hook that can be moved up and down is employed as the fixing mechanism on the battery pack side, there is a problem that the shape of the battery pack becomes large due to the restriction of securing the installation space of the hook in the battery pack.

  Furthermore, in the battery-type electric tool described in Patent Document 2, the housing and the battery pack are fixed by only one claw provided at the tip of the hook on the battery pack side. There was a problem that could not.

  The present invention has been made in view of the above-described problems, and is a battery-type electric tool that can safely and easily attach and detach the housing and the battery pack, and can realize stable and reliable fixing. Is intended to provide.

  The present invention will be described below. In addition, in order to make an understanding of this invention easy, the reference number of an accompanying drawing is attached in parenthesis writing, However, This invention is not limited to the form of illustration by it.

The battery-type electric tool according to the present invention includes a housing (10) that houses a motor (11) serving as a drive source of the tool, and a drive for the motor (11) by being detachably installed in the housing (10). A battery pack (30) for supplying electric power, and the battery pack (30) slides in a direction substantially parallel to the installation reference plane (20) of the battery pack formed in the housing (10). Thus, the battery-type electric tool is attached and detached to and from the housing (10), and the housing (10) is substantially parallel to the sliding direction of the battery pack (30). A slide rail (21) is provided, and the slide rail (21) has a claw on a side surface that guides the battery pack (30). Includes engagement portion (22), said battery pack (30), characterized in that the pawl engaging portion (22) comprises an engagement or disengagement freely engaging claw (32).

In battery-powered power tool in the invention, the at the tip of the slide rail (21), that said engagement claw (32) and contact with the inclined surface when mounting the said battery pack (30) (23) is formed It can be.

In the battery-type power tool according to the present invention, the engaging claw (32) can be rotated in the horizontal direction by being pushed by the slope (23) when the battery pack (30) is mounted. .

In the battery-type power tool according to the present invention, the housing (10) includes an elastic member (27) that presses the battery pack (30) when the battery pack (30) is mounted on the housing (10). The housing (10) is provided with a plurality of housing side terminals (26) that are connected to the plurality of battery pack side terminals (36) of the battery pack (30) and are supplied with driving power. The elastic member (27) can be installed between the plurality of housing side terminals (26) .

Furthermore, in the battery-type power tool according to the present invention, the housing (10) includes a pair of the slide rails (21), and includes the plurality of housing side terminals (26) between the pair of slide rails (21). A terminal holder (25) may be provided, and the elastic member (27) may be installed on the terminal holder (25) .

Furthermore, in the battery-type power tool according to the present invention, the housing (10) includes an elastic member that presses the battery pack (30) when the battery pack (30) is mounted on the housing (10). 27), the battery pack (30) includes a terminal holder (35) on which a battery pack side terminal (36) is installed, and the terminal holder (35) of the battery pack (30) is connected to the elastic member ( 27). Furthermore, a convex part (37) is formed in the terminal holder (35) of the battery pack (30), and the convex part (37) receives the elastic force of the elastic member (27) .

  The summary of the invention does not enumerate all the necessary features of the present invention, and sub-combinations of these feature groups can also be the invention.

  ADVANTAGE OF THE INVENTION According to this invention, the battery-type electric tool which can attach or detach a housing and a battery pack safely and easily, and can implement | achieve stable and reliable fixation can be provided.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments for carrying out the invention will be described with reference to the drawings. The following embodiments do not limit the invention according to each claim, and all combinations of features described in the embodiments are not necessarily essential to the solution means of the invention. . Furthermore, although the battery-type electric tool according to the present embodiment is described by exemplifying a case where it is configured as an impact driver, the battery-type electric tool according to the present invention is not limited to such a form. It can be applied to any battery-powered tool such as a drill, screwdriver, wrench, saw, hammer drill, grinder, mixer, and trimmer.

  FIG. 1 is a vertical cross-sectional side view showing the overall configuration of the battery-type power tool according to the present embodiment, and shows a state where a battery pack is mounted on the housing. The battery-type electric tool according to the present embodiment is configured as an impact driver, and has a housing 10 that houses a motor 11 serving as a drive source of the tool and a detachable installation in the housing 10 as main components. And a battery pack 30 for supplying drive power to the motor 11.

  The drive mechanism of the battery-type electric tool according to the present embodiment transmits the motor 11 as a drive source, the planetary gear train 13 for reduction connected to the motor output shaft 12 of the motor 11, and the planetary gear train 13. The spindle 14 is rotationally driven by the driving force of the motor 11 and the impact mechanism 15 is connected to the spindle 14.

  The motor output shaft 12 of the motor 11 fixedly installed in the housing 10 is rotatably supported by a first bearing 16 at the shaft end in the tool installation direction. A pinion gear 17 is attached to the motor output shaft 12. It has been. A plurality of planetary gears 13a included in the planetary gear train 13 are meshed with the pinion gear 17, and each planetary gear 13a is rotatably supported by the spindle 14 via a support shaft 13b. Each planetary gear 13 a meshes with an internal gear 13 c that is fixedly installed in the housing 10. The spindle 14 is rotatably supported in the housing 10 via the second bearing 18, and when the motor 11 rotates, the motor rotational force is transmitted via the planetary gear train 13 and rotates at a predetermined rotational speed. It will be.

  Further, an impact mechanism 15 is connected to the spindle 14. The impact mechanism 15 includes an anvil 15a and a hammer 15b. When a certain external torque (screw tightening resistance) is applied to the anvil 15a through a tool (not shown) in the screw tightening operation, the hammer 15b is applied. Is struck against the anvil 15a in the rotational direction so that it can be tightened firmly.

  Now, the battery-type electric tool according to the present embodiment has a feature in the attachment / detachment structure of the housing 10 and the battery pack 30. By adopting this attachment / detachment structure, a significant effect not found in the prior art can be exhibited. it can. Therefore, the configurations of the housing 10 and the battery pack 30 will be described in detail with reference to the drawings.

  First, the configuration of the housing 10 will be described with reference to FIGS. 2A, 2B, and 2C. Here, FIG. 2A is an external side view showing a side surface of a housing constituting the battery-type electric tool according to the present embodiment, and FIG. 2B is a main part longitudinal cross-sectional front view showing a DD cross section in FIG. 2A. is there. 2C is an external bottom view when the housing shown in FIG. 2A is viewed from the bottom side.

  As shown in FIGS. 2A, 2B, and 2C, the housing 10 includes an installation reference surface 20 that serves as an installation reference when the battery pack 30 is installed. A pair of slide rails 21 installed in a direction substantially parallel to the sliding direction of the battery pack 30 is installed on the installation reference plane 20, and the pair of slide rails 21 are used when the battery pack 30 is attached and detached. In addition, it plays a role of guiding the slide movement of the battery pack 30 in a substantially parallel direction with respect to the installation reference plane 20. Further, a claw engaging portion 22 is formed on the outer side surface of each of the pair of slide rails 21, and a slope 23 is formed on the outer side surface from next to the claw engaging portion 22 to the tip of the slide rail 21. Has been.

  Further, as shown in FIG. 2C, the housing 10 includes a terminal holder 25 between the pair of slide rails 21. A plurality of housing-side terminals 26 are installed in the terminal holder 25. The plurality of housing-side terminals 26 are configured to be supplied with driving power by being connected to a plurality of battery pack-side terminals 36 included in a battery pack 30 described later. In addition, an elastic member 27 is installed in the terminal holder 25, and the elastic member 27 is installed in a state of being sandwiched between terminals at the central portion of the plurality of housing side terminals 26. By installing the elastic member 27 in such a place, a battery-type power tool having a compact shape can be realized. The elastic member 27 is a member that performs a function of stably fixing the battery pack 30 by pressing the battery pack 30 when the battery pack 30 is attached to the housing 10.

Next, the configuration of the battery pack 30 will be described with reference to FIGS. 3A to 3F. Here, FIG. 3A is an external side view showing the side of the battery pack constituting the battery-type electric tool according to the present embodiment, and FIG. 3B is an external top view showing the top of the battery pack shown in FIG. 3A. is there. 3C and 3D are cross-sectional top views showing the EE cross section in FIG. 3A, and are diagrams for explaining the engaging / disengaging operations of the engaging claws provided in the battery pack. 3E is a longitudinal sectional front view showing the FF section shown in FIG. 3B, and FIG. 3F is a longitudinal sectional front view showing the GG section shown in FIG. 3C.

  The battery pack 30 shown in FIGS. 3A to 3F includes a pair of holding portions 31 that realizes sliding movement along the installation reference plane 20 of the battery pack 30 by holding the pair of slide rails 21 included in the housing 10. It has. As shown in more detail in FIG. 3F, the pair of holding portions 31 includes an inner sliding surface 31 a having an approximately L shape so that the slide rail 21 can be held from the outer side. By sliding the inner sliding surface 31 a and the slide rail 21, the battery pack 30 can be slid relative to the housing 10.

  In addition, a pair of engaging claws 32 that can be freely engaged and disengaged from the above-described claw engaging portion 22 of the slide rail 21 are installed in the upper portion of the battery pack 30 (see FIG. 3C). The engaging claw 32 is formed with a claw portion 32a that engages and disengages with the claw engaging portion 22 at one end, and the other end is pressed when the user operates the engaging claw 32. An operation unit 32b is formed. The engaging claw 32 configured as described above is installed so as to be rotatable about a rotation shaft 33 erected on the inner side of the position where the engagement claw 32 is disposed. 33 is installed via a torsion spring 34. Therefore, the engaging claw 32 is always subjected to a force in the direction in which the claw portion 32a rotates in the central direction of the battery pack 30 by the elastic force of the torsion spring 34 (see FIG. 3C).

  On the other hand, as shown in FIG. 3D, when an external force is applied to the operation portion 32b from the direction of the arrow C, the torsion spring 34 receives a torsional load (torque) around the center axis of the spring. When the external force indicated by (1) exceeds the elastic force of the torsion spring 34, the claw portion 32a rotates in the outer direction of the battery pack 30. Therefore, due to the presence of the rotation mechanism constituted by the rotation shaft 33 and the torsion spring 34, the engagement claw 32 can be rotated in a direction substantially parallel to the installation reference plane 20 formed in the housing 10, and the slide rail It is possible to engage and disengage from the claw engaging portion 22 formed in 21. In addition, since the engaging claw 32 can be rotated in a direction substantially parallel to the installation reference plane 20, the installation space of the engaging claw 32 can be made compact, so that a battery pack 30 of a suitable size is realized. It becomes possible to do.

  Further, the battery pack 30 includes a terminal holder 35 at an intermediate position between the pair of holding portions 31, and a plurality of battery pack side terminals 36 are installed in the terminal holder 35. When the battery pack 30 is mounted on the housing 10, the plurality of battery pack side terminals 36 are connected to the plurality of housing side terminals 26 installed on the housing 10 side and supply driving power.

  Further, a convex portion 37 is formed at the center position of the terminal holder 35. The convex portion 37 is installed at a position opposite to the elastic member 27 installed in the housing 10. When the battery pack 30 is attached to the housing 10, the convex portion 37 presses the elastic member 27 and is elastic. It is configured to receive power. Due to the effect of the convex portion 37, the battery pack 30 can be attached to the housing 10 more stably without rattling. In addition, the battery-type electric tool of a compact shape is implement | achieved by adoption of the terminal holder 35 and formation of the convex part 37 to the center position of the terminal holder 35. FIG.

  A plurality of charging batteries 38 are stacked and installed in the lower part of the battery pack 30. The number of charging batteries 38 can be arbitrarily set according to a desired tightening torque, work object, work time, and the like. The capacity of the casing 39 that forms the outer portion of the battery pack 30 is also low. What is necessary is just to set suitably according to the number of the batteries 38 for charge.

  The specific configurations of the housing 10 and the battery pack 30 have been described above. Next, the overall configuration of the battery-type power tool according to this embodiment and the attaching / detaching operation of the battery pack 30 will be described with reference to FIGS. 1, 4, 5 </ b> A, and 5 </ b> B. FIG. 4 is a longitudinal sectional front view showing the AA cross section in FIG. 1, and shows a mounting state of the housing and the battery pack. 5A and 5B are cross-sectional top views showing the BB cross section in FIG. 1, and the engagement / disengagement operation of the claw engagement portion of the slide rail provided in the housing and the engagement claw provided in the battery pack. It is a figure for demonstrating.

  As shown in FIG. 4, attachment / detachment of the battery pack 30 with respect to the housing 10 by sliding movement is realized by a pair of slide rails 21 formed on the housing 10 and a pair of holding portions 31 formed on the battery pack 30. ing. In the middle of the operation of mounting the battery pack 30, as shown in FIG. 5B, the claw portion 32 a is pushed toward the outside of the housing 10 along the shape inside the housing 10. 32 rotates against the elastic force of the torsion spring 34. And when the nail | claw part 32a just becomes the position of the nail | claw engaging part 22, the press to an outer side is cancelled | released and it will be in an engagement state as shown to FIG. 5A. Thus, in the battery-type electric tool according to the present embodiment, it is not necessary to apply a pressing force in the direction of the arrow C to the operation portion 32b when the battery pack 30 is attached to the housing 10. Therefore, the user can easily attach the battery pack 30 to the housing 10. In the battery-type electric tool according to the present embodiment, the pair of claw engaging portions 22 formed on the slide rail 21 can be reliably engaged by the pair of engaging claws 32 that rotate in the horizontal direction. In addition, a large installation space is not required, and the battery pack 30 can be stably and surely attached to the housing 10.

  In order to smoothly attach the engaging claw 32 to the claw engaging portion 22, as shown in FIGS. 5A and 5B, it is preferable that the tip shape of the claw portion 32a be a slope. This is because by making the shape of the claw portion 32a into a slope shape, smooth initial contact between the slope surface 23 at the tip of the slide rail 21 and the claw portion 32a at the tip of the engagement claw 32 when the battery pack 30 is mounted is possible. .

  5A, in the battery-type power tool according to the present embodiment, when the housing 10 and the battery pack 30 are mounted, the claw engaging portion 22 of the slide rail 21 included in the housing 10 and the battery pack 30 are provided. The elastic member 27 provided in the terminal holder 25 of the housing 10 slides between the housing 10 and the battery pack 30 by the elastic force exerted on the convex part 37 provided in the battery pack 30 as well as the engagement claw 32 provided. The pressing force in the opposite direction works. Therefore, according to the battery-type electric tool according to the present embodiment, an effect that the connection state between the terminals 26 and 36 can be stabilized can be obtained. That is, by adopting such a configuration, occurrence of rattling between the plurality of housing-side terminals 26 and the plurality of battery pack-side terminals 36 is prevented, and occurrence of abnormalities such as chattering can be prevented.

  On the other hand, when removing the battery pack 30 from the housing 10, as shown in FIG. 5B, a force is applied to the operation portion 32 b in the direction of arrow C to rotate the pair of engaging claws 32. The claw portion 32a may be detached from the engaging portion 22, and the battery pack 30 may be slid thereon.

  As mentioned above, although preferred embodiment of this invention was described, the technical scope of this invention is not limited to the range as described in the said embodiment. Various modifications or improvements can be added to the embodiment.

  For example, in the battery-type electric tool according to the present embodiment, the case where four housing side terminals 26 and four battery pack side terminals 36 are provided has been described as an example. However, the application of the present invention is not limited to such a form, and can also be applied to a case where each terminal is composed of three terminals 26 and 36 as shown in FIG. In the case of such a battery-type power tool including three terminals 26 and 36, two elastic members 27 provided in the housing 10 and two convex portions 37 provided in the battery pack 30 are installed, and these are all connected to the terminals 26. , 36 can be installed. By adopting the configuration shown in FIG. 6, the housing 10 and the battery pack 30 can be stably attached and detached.

  In addition, the elastic member 27 included in the housing 10 illustrated in the above-described embodiment is configured to press the battery pack 30 via the convex portion 37, but is not provided on the wall surface of the battery pack 30 without providing the convex portion 37. On the other hand, the elastic member 27 may be configured to exert an elastic force directly.

  Further, the installation position of the elastic member 27 installed on the housing 10 side and the installation position of the projection 37 installed on the battery pack 30 side are switched, and the projection 37 is installed on the housing 10 side, and the battery pack 30 side It is possible to install the elastic member 27 on the surface. It is apparent from the description of the scope of claims that embodiments with such changes or improvements can be included in the technical scope of the present invention.

It is a longitudinal cross-sectional side view which shows the whole structure of the battery-type electric tool which concerns on this embodiment, and has shown the state by which the battery pack was mounted | worn with respect to the housing. It is an appearance side view showing the side of the housing which constitutes the battery type electric tool concerning this embodiment. It is a principal part longitudinal cross-section front view which shows the DD cross section in FIG. 2A. It is an external appearance bottom view at the time of seeing the housing shown in FIG. 2A from the bottom face side. It is an external appearance side view which shows the side surface of the battery pack which comprises the battery type electric tool which concerns on this embodiment. It is an external appearance top view which shows the upper surface of the battery pack shown in FIG. 3A. It is a cross-sectional top view which shows the EE cross section in FIG. 3A, and is a figure for demonstrating engagement operation | movement of the engagement claw with which a battery pack is provided. It is a cross-sectional top view which shows the EE cross section in FIG. 3A, and is a figure for demonstrating the releasing operation | movement of the engaging claw with which a battery pack is provided. It is a longitudinal cross-section front view which shows the FF cross section shown in FIG. 3B. It is a longitudinal cross-sectional front view which shows the GG cross section shown in FIG. 3C. It is a longitudinal cross-sectional front view which shows the AA cross section in FIG. 1, and has shown the mounting state of the housing and the battery pack. It is a cross-sectional top view which shows the BB cross section in FIG. 1, and is a figure for demonstrating engagement operation | movement with the nail | claw engaging part of the slide rail with which a housing is provided, and the engaging claw with which a battery pack is provided. It is a cross-sectional top view which shows the BB cross section in FIG. 1, and is a figure for demonstrating the detachment | leave operation | movement of the nail | claw engaging part of the slide rail with which a housing is provided, and the engaging claw with which a battery pack is provided. It is a figure which illustrates the various form of the battery-type electric tool which concerns on this embodiment, and is a figure which shows the case where a housing side terminal and a battery pack side terminal are provided 3 each.

  10 housing, 11 motor, 12 motor output shaft, 13 planetary gear train, 13a planetary gear, 13b support shaft, 13c internal gear, 14 spindle, 15 impact mechanism, 15a anvil, 15b hammer, 16 first bearing, 17 pinion gear, 18 Second bearing, 20 Installation reference plane, 21 Slide rail, 22 Claw engaging portion, 23 Slope, 25, 35 Terminal holder, 26 Housing side terminal, 27 Elastic member, 30 Battery pack, 31 Holding portion, 31a Inside Sliding surface, 32 engaging claw, 32a claw portion, 32b operation portion, 33 rotating shaft, 34 torsion spring, 36 battery pack side terminal, 37 convex portion, 38 battery for charging, 39 casing.

Claims (7)

A housing for storing a motor as a drive source of the tool;
A battery pack that supplies drive power to the motor by being detachably installed in the housing;
A battery-type electric tool in which the battery pack is attached to and detached from the housing by being slid in a direction substantially parallel to a reference plane of installation of the battery pack formed in the housing. There,
The housing includes a slide rail substantially parallel to the slide direction of the battery pack,
The slide rail includes a claw engaging portion on a side surface for guiding the battery pack,
The battery pack includes an engaging claw that is freely engageable and disengageable at the claw engaging portion. The battery-type electric tool according to claim 1, wherein a slope that contacts the engaging claw when the battery pack is mounted is formed at a tip of the slide rail . The battery-type electric tool according to claim 2, wherein the engaging claw is rotated in a horizontal direction by being pushed by the slope when the battery pack is mounted . The housing includes an elastic member that presses the battery pack when the battery pack is mounted on the housing, and the housing is connected to a plurality of battery pack side terminals of the battery pack to drive power. The battery-type electric tool in any one of Claims 1 thru | or 3 with which the some housing side terminal which receives supply of this is installed, and the said elastic member is installed between these housing side terminals . 5. The housing according to claim 4, wherein the housing includes a pair of slide rails, a terminal holder including the plurality of housing-side terminals is provided between the pair of slide rails, and the elastic member is disposed on the terminal holder. Battery powered power tool. The housing includes an elastic member that presses the battery pack when the battery pack is mounted on the housing, the battery pack includes a terminal holder on which a battery pack side terminal is installed, and the battery pack includes the terminal holder. The battery-type electric tool according to any one of claims 1 to 3, wherein the terminal holder receives an elastic force of the elastic member . The battery-type electric tool according to claim 6, wherein a convex portion is formed on the terminal holder of the battery pack, and the convex portion receives an elastic force of the elastic member.