Operating machinery

Abstract

A cutting tool is provided that suppresses a decrease in workability. The cutting tool comprises a housing and a handle connected to the housing. The handle further comprises a gripping portion; a first connecting portion extending forward from one end of the gripping portion and fixed to the main housing; and a second connecting portion extending forward from the other end of the gripping portion and fixed to the main housing. Thus, the housing and handle form a ring structure. Furthermore, a battery pack mounted in a battery mounting section of the motor housing is disposed within this ring structure. Therefore, since the housing and handle function as a surrounding portion enclosing the battery pack, the protection performance of the battery pack is improved, and a decrease in workability is suppressed.

Description

Technical Field

[0001] This invention relates to a work machine. Background Technology

[0002] In the power tool (working machine) described in Patent Document 1 below, the housing constituting the outer contour of the tool comprises a motor housing and a handle with a grip. The motor housing houses a motor that drives a circular saw (top tool). Furthermore, a battery assembly is provided in the housing, configured to allow the battery pack (battery) to be installed and removed. Therefore, by assembling the battery in the battery assembly, power can be supplied to the motor from the battery pack for operation. As a result, workability is improved compared to power tools that include a power cord.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2018-187702 Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] However, the power tool has room for improvement in the following aspects. Specifically, in the power tool, when the battery pack is installed, the battery pack protrudes further rearward than the power tool itself. Therefore, for example, if the power tool, with the battery pack installed, falls from the rear, the battery pack or its mounting portion may contact the ground, potentially deforming or breaking due to the impact, thus impairing workability. Therefore, it is ideal for the power tool to have a structure that improves the protection of the installed battery pack. Furthermore, depending on the position or mounting configuration of the battery pack, it may obstruct operation. Therefore, it is ideal for the power tool to be configured so that the installed battery pack does not affect operation. Additionally, as with the power tool, the handle held by the operator also protrudes from the main body; depending on the handle's mounting method, the handle may deform or break upon falling, impairing workability.

[0008] In view of the aforementioned facts, the present invention aims to provide a work machine that suppresses a decrease in workability. Furthermore, as another objective, it aims to provide a work machine that improves the protection performance of the installed battery or battery holder (battery assembly). Additionally, as yet another objective, it aims to provide a work machine capable of suppressing deformation and breakage of the handle.

[0009] Technical means to solve the problem

[0010] One or more embodiments of the present invention are a work machine comprising: a housing housing a motor; a handle connected to the housing; and a battery mounting / unmounting part disposed in the housing, wherein the battery is mounted in a manner that allows the battery supplying power to the motor to be mounted / unmounted. The handle comprises: a grip portion for a worker to hold; a first connecting portion extending from one end of the grip portion toward a side of the housing and connected to the housing; and a second connecting portion extending from the other end of the grip portion toward a side of the housing and connected to the housing, wherein the first connecting portion is located above the battery and the second connecting portion is located below the battery.

[0011] One or more embodiments of the present invention are a working machine, wherein the handle and the housing form an annular structure, and the battery installed in the battery loading and unloading part is disposed inside the annular structure.

[0012] One or more embodiments of the present invention are a working machine, wherein the handle has a protective part, the protective part connecting the middle part of the first connecting part in the longitudinal direction and the middle part of the second connecting part in the longitudinal direction inside the annular structure, and is disposed between the battery installed in the battery loading and unloading part and the gripping part.

[0013] One or more embodiments of the present invention are a working machine, wherein a control unit for controlling the motor is housed inside the protective part.

[0014] One or more embodiments of the present invention are a working machine, which includes a top tool connected to the motor and rotated by the motor. The top tool is formed as a circular plate with the axis of the motor as the plate thickness direction. The gripping part, the first connecting part, and the second connecting part extend in a direction orthogonal to the axis of the motor when viewed from above.

[0015] One or more embodiments of the present invention are a working machine, wherein the housing is composed of the following components: a motor housing for housing the motor; and a main body housing for housing the top tool and connected to the motor housing; the handle is fixed to the main body housing without passing through the motor housing; and the battery loading / unloading part is disposed in the motor housing.

[0016] One or more embodiments of the present invention are a working machine, wherein a direction orthogonal to the vertical direction is designated as a first direction, and a direction orthogonal to both the first direction and the vertical direction is designated as a second direction. The motor is configured with the first direction as its axial direction. The motor, the battery loading / unloading part, and the gripping part are arranged sequentially along a first inclined direction that tilts upward toward one side of the second direction when viewed from the first direction. A base capable of sliding on the workpiece is disposed below the motor and the handle. Another embodiment of the present invention is a working machine in which the motor housing, when viewed from the first direction, is composed of a segmented housing portion divided in a second inclined direction orthogonal to the first inclined direction. A pair of housing side guide rails are provided in the segmented housing portion, forming part of the battery loading / unloading part and engaging with the battery.

[0017] One or more embodiments of the present invention are a working machine comprising: a motor housing housing a motor; a circular saw blade rotated by the motor; a base located below the motor housing and having a through hole for at least a portion of the circular saw blade to protrude downwards; a handle connected to the motor housing; and a battery mounting / unmounting part disposed in the motor housing and for mounting a battery that supplies power to the motor in a detachable manner. In the working machine, the battery mounting / unmounting part is configured to support the battery in a direction inclined relative to the lower surface of the base. Additionally, one or more embodiments of the present invention are a working machine in which the battery mounting / unmounting part has two battery support portions, one of which is located on the upper side and is closer to the center of the motor in the front-rear direction than the other battery support portion located on the lower side. Furthermore, one or more embodiments of the present invention are a working machine in which the battery support portion is a guide rail extending in the left-right direction. In addition, one or more embodiments of the present invention are a working machine in which the battery loading and unloading part supports the battery in such a way that the lower end of the battery is located above the lower end of the motor housing.

[0018] The effects of the invention

[0019] According to one or more embodiments of the present invention, a work machine that suppresses the reduction of workability can be realized. Attached Figure Description

[0020] Figure 1 This is a side view taken from the right side, showing the state of the battery assembly installed on the cutting tool of this embodiment.

[0021] Figure 2 yes Figure 1The cutting tool shown is viewed from above in plan view.

[0022] Figure 3 yes Figure 1 The cutting tool shown is viewed from the right front.

[0023] Figure 4 yes Figure 1 The cutting tool shown is viewed from the left oblique front in a three-dimensional perspective.

[0024] Figure 5 It means to Figure 3 The diagram shows the disassembled three-dimensional view of the motor housing and handle after they have been separated from the main housing.

[0025] Figure 6 This is the state after the right-side handle component and battery pack have been removed. Figure 1 The cutting tool shown is viewed from the right side.

[0026] Figure 7 This is represented by the state after the split housing component and battery pack on one side of the second tilt direction have been removed. Figure 1 The cutting tool shown is viewed from the right side.

[0027] Figure 8 It means Figure 1 The cross-sectional view of the inside of the cutting tool as viewed from one side in the second inclined direction (shown). Figure 1 (8-8 line cross-section).

[0028] Figure 9 It means Figure 1 A cross-sectional view of the interior of the cutting tool as seen from the front. Figure 1 (Sectional view along line 9-9).

[0029] Figure 10 (A) is Figure 1 The image shown is a front view of the battery pack. Figure 10 (B) is Figure 10 Side view of the battery pack (A).

[0030] [Explanation of Symbols]

[0031] 10: Cutting tools (operating machinery)

[0032] 20: Base

[0033] 30: Shell

[0034] 32: Main body shell

[0035] 40: Motor housing

[0036] 40A: Segmented housing section

[0037] 40B: Segmented housing section

[0038] 42: Battery loading and unloading section (Battery loading and unloading section)

[0039] 45: Housing side guide rail section

[0040] 50: Handle

[0041] 51: Grip section

[0042] 52: First connecting section

[0043] 53: Third Link

[0044] 56: Protection Department

[0045] 70: Motor

[0046] 90: Control Department

[0047] 95: Saw (top tool)

[0048] 100: Battery pack (battery)

[0049] S: Ring structure Detailed Implementation

[0050] The cutting tool 10, which is the "operating machine" of this embodiment, will be described below using the accompanying drawings. Furthermore, in the drawings, arrows UP, FR, and RH appropriately represent the upper, front, and right sides of the cutting tool 10, respectively. In the following description, when using the directions of up / down, front / back, and left / right, unless otherwise specified, they will be used to represent the up / down direction, front / back direction, and left / right direction of the cutting tool 10. Additionally, when viewed from the left / right direction, the direction that tilts upwards towards the rear (…) Figure 1 The directions of arrows A and B are set as the first tilt direction, and the direction orthogonal to the first tilt direction is ( Figure 1 The directions of arrows C and D are set as the second tilt direction. Furthermore, the left-right direction corresponds to the first direction of the present invention, and the front-back direction corresponds to the second direction of the present invention.

[0051] The cutting tool 10 is configured as a tool for cutting the workpiece. For example... Figures 1-4 ,and Figure 9 As shown, the cutting tool 10 comprises the following components: a base 20, a housing 30, a handle 50, a motor 70 and a transmission mechanism 80 housed within the housing 30, and a control unit 90 (see reference). Figure 6Furthermore, the cutting tool 10 is configured to be able to install and remove a battery pack 100, which serves as a "battery" for supplying power to the motor 70. The structure of the cutting tool 10 will be described below.

[0052] (Regarding the base 20) The base 20 is formed as a generally rectangular plate with the thickness direction in the vertical direction and the length direction in the front-back direction. Moreover, when processing with the cutting tool 10, the base 20 is placed on the upper side of the workpiece, and the lower surface of the base 20 slides along the upper surface of the workpiece.

[0053] On the left side of the base 20, a tool insertion part 20A is formed for arranging a saw blade 95 as a "top tool". The tool insertion part 20A is formed into a generally rectangular hole with the longitudinal direction as the length when viewed from above. That is, the tool insertion part 20A is a through hole for the saw blade 95 to protrude downward. Here, the saw blade 95 is formed into a generally circular plate with the thickness direction as the left-right direction, and the center part of the saw blade 95 is fixed to the output shaft 81 (see reference 80) in a manner that allows it to rotate integrally with the output shaft 81 of the transmission mechanism 80 described later. Figure 9 Furthermore, the saw blade 95 is disposed within the tool insertion part 20A, with the upper part of the saw blade 95 protruding upward from the base 20 and the lower part of the saw blade 95 protruding downward from the base 20. The saw blade 95 is a circular saw blade.

[0054] (Regarding housing 30) as follows Figures 2-5 , Figure 8 ,and Figure 9 As shown, the housing 30 is disposed on the upper side of the base 20. The housing 30 is composed of a main housing 32 and a motor housing 40.

[0055] <Regarding the main body housing 32> The main body housing 32 is composed of the following components: saw cover part 34, which constitutes the left side portion of the main body housing 32; and gear housing part 36, which constitutes the right side portion of the main body housing 32.

[0056] The saw cover portion 34 is configured to cover the upper part of the saw blade 95 from above. When viewed from the right side, the saw cover portion 34 is formed as a semi-circular shape protruding upward and a concave shape opening downward. Specifically, the saw cover portion 34 is configured including the following components: an outer peripheral wall 34A extending radially outward along the circumference of the saw blade 95; a right wall 34B extending radially inward from the right end of the outer peripheral wall 34A; and a left wall 34C extending radially inward from the left end of the outer peripheral wall 34A. The right wall 34B is formed as a generally semi-circular plate protruding upward when viewed from the side, and the left wall 34C is formed as a generally semi-circular arc plate protruding upward when viewed from the side.

[0057] Additionally, on the upper part of the right wall 34B of the saw housing 34, a pair of front and rear first fixing bosses 34D for fixing the first connecting part 52 of the handle 50 (described later) are formed (see reference). Figure 5 The first fixed boss 34D is formed in a generally cylindrical shape with the left-right direction as the axis, and protrudes to the right from the right wall 34B.

[0058] Furthermore, at the lower rear end of the right wall 34B of the saw housing 34, a second fixing boss 34E for fixing the second connecting portion 53 of the handle 50 (described later) is formed (see reference). Figure 5 The second fixed boss 34E is formed in a generally cylindrical shape with the left-right direction as the axis, and protrudes to the right from the right wall 34B.

[0059] A gear housing portion 36 is formed at the lower end of the right wall 34B of the saw housing portion 34 and at the middle of its front-rear direction. Specifically, the gear housing portion 36 is disposed below the first fixing boss 34D and in front of the second fixing boss 34E. The gear housing portion 36 is formed as a generally bottomed rectangular cylinder that opens to the left and protrudes to the right from the right wall 34B. A support cylinder portion 36A is formed on the bottom wall of the gear housing portion 36. The support cylinder portion 36A is formed as a generally cylindrical shape with the left-right direction as its axial direction, and its interior is through in the left-right direction.

[0060] Furthermore, the front end of the base 20 is connected to the front end of the main body housing 32 via the front connecting mechanism 22, and the rear end of the base 20 is connected to the rear end of the main body housing 32 via the rear connecting mechanism 24. The front connecting mechanism 22 includes: an inclined support 22A, an inclined position fixing rod 22B, a connecting part 22C, a swing shaft 22D, and an inclined shaft 22E. The inclined support 22A has an arc-shaped guide hole 22A1 extending through in the front-rear direction. The inclined position fixing rod 22B has a fixing shaft 22B1. The fixing shaft 22B1 extends in the front-rear direction through the guide hole 22A1. The rear connecting mechanism 24 includes a connecting rod 24A and a protrusion fixing rod 24B. The connecting rod 24A has an arc-shaped guide hole 24A1. The protrusion fixing rod 24B has a fixing shaft 24B1. The fixing shaft 24B1 is inserted into the guide hole 24A1. The front connecting mechanism 22 and the rear connecting mechanism 24 implement a tilting mechanism and a cutting depth adjustment mechanism. The tilting mechanism is a mechanism that can adjust (change) the angle of the saw blade 95 relative to the lower surface of the base 20. The cutting depth adjustment mechanism is a mechanism that can adjust (change) the amount of protrusion of the saw blade 95 protruding downward from the lower surface of the base 20. The main body housing 32 can rotate relative to the base 20 about a tilting axis 22E extending in the front-rear direction, and the saw blade 95 can be tilted in the left and right directions by rotating. The tilt position of the main body housing 32 (saw blade 95) can be fixed by operating the tilt position fixing rod 22B, and conversely, it can be adjusted by operating the tilt position fixing rod 22B to reduce the fixing force. The figure shows the state with a tilt angle of 0 degrees and the saw blade 95 perpendicular to the lower surface of the base 20. Furthermore, the main body housing 32 can rotate relative to the base 20 about the swing axis 22D extending in the left-right direction. By rotating, the protrusion amount of the saw blade 95 protruding downward from the lower surface of the base 20 can be adjusted (changed). The figure shows the state where the protrusion amount of the saw blade 95 from the lower surface of the base 20 is at its maximum. If viewed with the main body housing 32 as a reference, the base 20 is configured to be able to move downward along the circumference of the saw blade 95 via the rear connecting mechanism 24 and the swing axis 22D.

[0061] <Regarding motor housing 40> as follows Figures 1-9 As shown, the motor housing 40 is configured to house the motor 70, which will be described later. The motor housing 40 is formed as a bottomed cylindrical shape that opens to the left and is located on the right side of the gear housing portion 36. At the left end of the motor housing 40, a pair of flange portions 41 are formed, each flange portion 41 facing one side in a second inclined direction (…). Figure 6 (the side in the direction of arrow C) and the other side in the second tilt direction ( Figure 6The flange 41 protrudes to the side (in the direction of arrow D). Furthermore, the flange 41 is securely fixed to the side wall of the gear housing portion 36. Thus, the motor housing 40 protrudes to the right from the main housing 32 on the upper side of the base 20.

[0062] The motor housing 40 has a battery loading and unloading section 42, which serves as a "battery loading and unloading section". The battery loading and unloading section 42 is located on one side of the left side portion (opening side portion) of the motor housing 40 in a first inclined direction. Figure 6 The motor housing 40 is raised (in the direction of arrow A). Therefore, when viewed from the left-right direction, the motor housing 40 is positioned along a first inclined direction and tilted relative to the front-back direction. Specifically, the front end of the motor housing 40 is disposed adjacent to the upper side of the base 20, and the battery mounting / unmounting portion 42 of the motor housing 40 is disposed separately from the base 20 towards the upper side (see reference). Figure 7 Furthermore, as described above, since the battery mounting / unmounting portion 42 protrudes to one side of the first inclined direction on the left side of the motor housing 40, a recessed portion 43 open to one side of the first inclined direction and the right side is formed at the right end of the motor housing 40 (see reference). Figure 2 and Figure 8 ).

[0063] like Figures 6-8 As shown, a battery insertion portion 44 is formed in the battery loading / unloading section 42, opening to one side and the right side in a first inclined direction. Additionally, a pair of housing-side guide rails 45 are formed on the sidewalls of the battery loading / unloading section 42 on both sides in a second inclined direction relative to the battery insertion portion 44. The two housing-side guide rails 45 are respectively provided on the upper and lower sides of the battery loading / unloading section 42. That is, the upper housing-side guide rail 45 is located higher than the center of the battery loading / unloading section 42, and the lower housing-side guide rail 45 is located lower than the center of the battery loading / unloading section 42. The housing-side guide rail 45 includes a groove-shaped portion opening inward in the second inclined direction and extends in the left-right direction. That is, the upper housing-side guide rail 45 has a groove opening downward, and the lower housing-side guide rail 45 has a groove opening upward. Furthermore, a connector 48 is provided in the battery loading / unloading section 42. The connector 48 protrudes from the battery insertion part 44 in one of the first inclined directions and is electrically connected to the control part 90, which will be described later.

[0064] like Figures 1 to 7 As shown, a plurality of air inlets 46 are formed at the right end of the motor housing 40, at one corner on one side and the other side of the second inclined direction. The plurality of air inlets 46 extend from the bottom wall to the side wall of the motor housing 40 in the left-right direction and are arranged in the first inclined direction.

[0065] like Figure 5As shown, the motor housing 40 is divided into two parts at its central portion in the second inclined direction. That is, the motor housing 40 is composed of a pair of segmented housing portions 40A and 40B, and the joint of the segmented housing portions 40A and 40B is formed along the first inclined direction. Specifically, the joint (joint surface) of the segmented housing portions 40A and 40B is aligned with the reference line CL (see reference CL) when viewed from the side. Figure 1 , Figure 6 ,and Figure 7The reference line CL passes through the axis of the rotation shaft 71 of the motor 70 (described later) and is along a first inclined direction. The battery loading / unloading section 42 is formed by joining a pair of split housing sections 40A and 40B. One of the pair of housing side guide rails 45 is provided in the split housing section 40A, and the other is provided in the split housing section 40B. The housing sections 40A and 40B form a symmetrical structure with the joint (joint surface) as a reference. By forming a mutually symmetrical structure with the housing sections 40A and 40B, the structure of the battery loading / unloading section 42, which requires a pair of guide rails, can be simplified, and high durability can also be ensured. Since the housing sections 40A and 40B have a mutually symmetrical structure, the rigidity of the battery loading / unloading section 42 can also be ensured. Since the joint of the housing sections 40A and 40B is along the reference line CL, the battery loading / unloading section 42 (the facing direction) is inclined relative to the front-rear direction. Specifically, the battery mounting / unmounting section 42 (facing direction) is configured to face rearward and upward. In other words, the motor housing 40 supports the battery pack 100 in a direction inclined relative to the lower surface of the base 20 (front-to-back direction). Therefore, the lower end of the battery pack 100 can be configured so that it does not protrude downward from the lower end of the motor housing 40. More specifically, the lower end of the battery pack 100 can be configured to be located higher than the lower end of the motor housing 40. The center position of the battery mounting / unmounting section 42 is located higher than the center position of the motor 70. The center position of the battery mounting / unmounting section 42 is located further rearward than the center position of the motor 70. Furthermore, the center position of the battery pack 100 is located lower than the upper end of the motor housing 40. Therefore, the battery pack 100 can be configured so that it does not protrude excessively upward. The positional relationship described above is achieved when the protrusion of the saw blade 95 is at its maximum. Assuming the lower end of the battery pack 100 protrudes further downward than the lower end of the motor housing 40, it may be difficult to ensure the proper protrusion of the saw blade 95 if the battery pack 100 comes into contact with the base 20 or the workpiece. However, in the cutting tool 10 of this embodiment, since the lower end of the battery pack 100, which is configured to support the motor housing 40, is located higher than the lower end of the motor housing 40, assembly can be improved by making the battery mounting / unmounting part 42 integral with the motor housing 40, while suppressing the possibility that the battery pack 100 may affect the protrusion of the saw blade 95. This structure is achieved in a configuration where the battery pack 100 is located behind the motor housing 40 by configuring the upper housing-side guide rail part 45 to be located further forward than the lower housing-side guide rail part 45. Furthermore, in the structure where the battery pack 100 is located in front of the motor housing 40, by configuring the upper housing side guide rail 45 to be located further rearward than the lower housing side guide rail 45, it is also possible to suppress the impact of the battery pack 100 on the protrusion of the saw blade 95.That is, by configuring the upper battery support (upper housing side guide rail 45) to be closer to the center position (rotation shaft 71) of the motor 70 in the front-back direction than the lower battery support (lower housing side guide rail 45) when viewed in the left-right direction, the impact of the battery pack 100 on the protrusion of the saw blade 95 can be suppressed.

[0066] (Regarding handle 50) as follows Figures 1 to 8 As shown, the handle 50 is located on the right side of the saw head portion 34 of the main housing 32. Furthermore, the handle 50 is composed of handle components that are divided into two parts in the left-right direction, and the handle 50 is formed by assembling the divided handle components.

[0067] The handle 50 is formed in a roughly U-shaped form that opens forward when viewed from the right. Specifically, the handle 50 includes the following components: a grip portion 51, which forms the rear end of the handle 50; a first connecting portion 52, which extends forward from the grip portion 51 and forms the upper end of the handle 50; and a second connecting portion 53, which extends forward from the grip portion 51 and forms the lower end of the handle 50.

[0068] The grip portion 51 is configured as a part for a user to hold. The grip portion 51 is located on the rear side of the housing 30 and extends forward in a direction that tilts upwards when viewed from the side. More specifically, when viewed from the side, the grip portion 51 is slightly tilted forward relative to a second tilting direction. A trigger 60 is provided on the upper end of the grip portion 51. The trigger 60 protrudes forward from the grip portion 51 and is configured to be able to be pulled backwards. Furthermore, a locking button 61 for locking the trigger 60's pulling operation is provided on the grip portion 51, above the trigger 60. It is configured such that the trigger 60 cannot be pulled unless the locking button 61 on the grip portion 51 is operated. Furthermore, a switch mechanism 62 (see reference 62) is provided inside the grip portion 51, behind the trigger 60. Figure 6 The switching mechanism 62 has a switch (not shown) operated by a trigger 60. The switch is configured to be electrically connected to the control unit 90 (described later) and to output an output signal corresponding to the operating state of the trigger 60 to the control unit 90.

[0069] The first connecting portion 52 extends forward from the upper end of the grip portion 51. More specifically, the first connecting portion 52 extends from the upper end of the grip portion 51 to the other side in a first inclined direction. Figure 1 and Figure 6 The arrow extends outwards in the direction of B. At the first connecting portion 52 of the left-side handle member, a pair of first fixed portions 52A are formed at a position corresponding to the first fixing boss 34D of the saw cover portion 34 (see...). Figure 6The first fixed portion 52A is formed as a generally bottomed cylindrical shape that opens to the left and protrudes to the right. Furthermore, the first fixing boss 34D of the saw housing portion 34 is inserted into the first fixed portion 52A from the left, thereby securing the first fixed portion 52A to the first fixing boss 34D. Thus, the front end of the first connecting portion 52 is fixed to the saw housing portion 34 on the upper side of the gear housing portion 36.

[0070] The second connecting portion 53 extends forward from the lower end of the grip portion 51. That is, the grip portion 51, the first connecting portion 52, and the second connecting portion 53 extend in a direction orthogonal to the left and right direction when viewed from above. On the second connecting portion 53 of the handle member on the left side, a second fixed portion 53A is formed at a position corresponding to the second fixing boss 34E of the saw cover portion 34 (see reference). Figure 6 The second fixed portion 53A is formed as a generally bottomed cylindrical shape that opens to the left and protrudes to the right. Furthermore, the second fixing boss 34E of the saw cover portion 34 is inserted into the second fixed portion 53A from the left, thereby securing the second fixed portion 53A to the second fixing boss 34E. As a result, the front end of the second connecting portion 53 is securely fixed to the saw cover portion 34 on the lower side of the battery mounting / removing portion 42 of the motor housing 40. Therefore, the front ends of the first connecting portion 52 and the front ends of the second connecting portion 53 are fixed to the saw cover portion 34 by clamping the motor housing 40 in the vertical direction. Consequently, a ring structure S (see reference) is formed by the motor housing 40 (gear housing portion 36), the first connecting portion 52, the grip portion 51, and the second connecting portion 53. Figure 1 ).

[0071] The handle 50 has a handle middle portion 54 that connects the middle portion of the first connecting portion 52 in the longitudinal direction, the front end portion of the second connecting portion 53, and the middle portion in the longitudinal direction. The handle middle portion 54 is disposed adjacent to the rear side of the gear housing portion 36 of the main body housing 32 (see reference). Figure 8 ).like Figures 5-8 As shown, a battery housing 55 is formed at the front of the handle middle portion 54, and the battery housing 55 is formed as a concave shape opening to the right. The battery housing 55 is a space surrounded by the handle middle portion 54, the first connecting portion 52, and the second connecting portion 53. The battery housing 55 is formed into a generally rectangular shape when viewed from the right side, and is disposed adjacent to one side of the gear housing portion 36 in the first inclined direction. That is, the motor housing 40 and the battery housing 55 are arranged in the first inclined direction, and the battery housing 55 is disposed inside the annular structure S.

[0072] Furthermore, when viewed from the right side, the battery housing 55 is inclined along a first inclined direction relative to the front-rear direction. That is, the inner peripheral surfaces of the two opposing portions of the battery housing 55 are arranged along the first inclined direction, and the inner peripheral surfaces of the two opposing portions of the battery housing 55 are arranged along a second inclined direction. Therefore, the vertical gap G between the battery housing 55 and the base 20 (refer to...) Figure 1 and Figure 7 The size is set to increase as it moves toward the rear. In addition, a slot 55A is formed on the wall on the other side of the opening of the battery housing 55 in the first inclined direction. Through the slot 55A, the opening of the battery housing 55 opens to the other side of the first inclined direction (motor housing 40 side).

[0073] Furthermore, one end portion of the motor housing 40 in the first inclined direction is disposed within the slot 55A of the battery housing 55, and the battery mounting / unmounting portion 42 of the motor housing 40 is disposed within the battery housing 55. As a result, the connector 48 of the motor housing 40 is exposed inside the battery housing 55.

[0074] Furthermore, a portion of the battery housing 55 in the middle part 54 of the handle, on one side in the first inclined direction, is configured as a protective part 56. The protective part 56 extends along the second inclined direction and connects the first connecting part 52 and the second connecting part 53. Thus, the protective part 56 is disposed between the battery housing 55 and the grip part 51 in the first inclined direction.

[0075] like Figure 1 , Figure 2 ,and Figure 8 As shown, a stepped portion 57 is formed in the protective portion 56. When viewed from the length direction of the protective portion 56, the stepped portion 57 is bent into a roughly crank shape, and the width dimension (dimension in the left-right direction) of the front part of the handle 50 is set to be greater than the width dimension of the rear part of the handle 50. As a result, on the left and right side walls of the handle 50, a pair of curved ridges 58 extending along the second inclined direction are formed in the protective portion 56, and the curved ridges 58 extend from the first connecting portion 52 to the second connecting portion 53.

[0076] (Battery pack 100) Here, the battery pack 100 housed in the battery housing section 55 will be described. Figure 10 (A) and Figure 10 As shown in (B), the battery pack 100 is formed in a generally rectangular parallelepiped shape. A connector portion 101 is formed on the upper part of the battery pack 100. In addition, battery side guide portions 102 are formed at both ends of the connector portion 101 in the width direction. The battery side guide portions 102 are formed in a generally inverted L-shape when viewed from the front of the battery pack 100, and extend in the length direction of the battery pack 100 and open to the front.

[0077] Furthermore, the battery pack 100 is housed from the right side within the battery housing 55 of the cutting tool 10 and installed in the battery loading / unloading portion 42 of the motor housing 40. Specifically, the housing-side guide rail portion 45 is configured to slidably insert into the battery-side guide rail portion 102 in the left-right direction, and the housing-side guide rail portion 45 and the battery-side guide rail portion 102 are engaged in a first inclined direction. Furthermore, with the battery pack 100 installed, the connector portion 101 is connected to the connector 48 of the motor housing 40, and power is supplied from the battery pack 100 to the control portion 90 (described later). Thus, the battery pack 100 is configured to be disposed inside the annular structure S.

[0078] In addition, locking members 103 are provided on the side of the battery pack 100. Moreover, the locking members 103 are configured to engage with the motor housing 40 when the battery pack 100 is installed, thereby maintaining the state in which the battery pack 100 is installed.

[0079] Here, as Figures 1-3 As shown, in the installed state of the battery pack 100 to the battery loading / unloading section 42, the battery pack 100 is housed in the battery receiving section 55 with the locking members 103 located on both sides of the battery pack 100 in the second inclined direction. Furthermore, in this state, the depth dimension of the battery receiving section 55 is set such that the locking members 103 protrude to the outside of the battery receiving section 55. In other words, the thickness dimension (dimension in the left-right direction) of the front part of the handle 50 is set such that the right side surface of the handle 50 is positioned further to the left than the locking members 103. In addition, in this state, the right end of the battery pack 100 is positioned further to the left than the right end of the motor housing 40. That is, the battery pack 100 is configured not to protrude further to the right than the motor housing 40. When loading or unloading the battery pack 100 by operating the locking members 103 with the right hand, the structure makes it easy for the fingers other than the thumb of the right hand to support the battery pack 100 from below, thus making the loading and unloading operation of the battery pack 100 easier.

[0080] (Regarding motor 70) as follows Figure 9 As shown, the motor 70 is housed within the motor housing 40. The motor 70 comprises a rotating shaft 71, a rotor 72, and a stator 73. The motor 70 is a brushless motor that does not require a rectifier (carbon brush).

[0081] The rotating shaft 71 is configured with its axial direction in the left-right direction. Furthermore, the right end of the rotating shaft 71 is supported and rotatable by a first motor bearing 76 fixed to the motor housing 40, and the left side of the rotating shaft 71 is supported and rotatable by a second motor bearing 77 fixed to the support cylinder 36A of the gear housing 36. Moreover, the left end of the rotating shaft 71 protrudes to the left from the second motor bearing 77 and is disposed within the support cylinder 36A; a pinion 71A is formed at the left end of the rotating shaft 71.

[0082] The rotor 72 is formed into a generally cylindrical shape with its axial direction in the left-right direction, and is disposed radially outside the rotating shaft 71, and is configured to rotate integrally with the rotating shaft 71. The stator 73 is formed into a generally cylindrical shape with its axial direction in the front-rear direction, and is supported on the motor housing 40 radially outside the rotor 72. The stator 73 has a stator holder 73A, and a stator coil is wound in the stator holder 73A. A motor base plate 74 is fixed to the right end of the stator holder 73A, and the stator coil is connected to the motor base plate 74. In addition, the motor base plate 74 is electrically connected to the control unit 90 described later via wires (not shown).

[0083] On the left side of the rotating shaft 71, to the right of the second motor bearing 77, a fan 75 is provided in a manner that allows it to rotate integrally. The fan 75 is configured as a centrifugal fan. Specifically, it is configured such that air flows into the motor housing 40 from the air inlet 46 through the airflow generated by the fan 75, and that the airflow flows radially outward from the fan 75. Thus, the motor 70 is cooled by the airflow generated by the fan 75.

[0084] (Regarding the transmission mechanism 80) The transmission mechanism 80 has an output shaft 81, which is axially arranged inside the gear housing portion 36 in the left-right direction and is located below the rotating shaft 71 of the motor 70. The right end of the output shaft 81 is supported by a first bearing 82 fixed to the gear housing portion 36 and is rotatable, while the left end of the output shaft 81 is supported by a second bearing 83 fixed to the gear housing portion 36 and is rotatable.

[0085] On the right side of the output shaft 81, a transmission gear 84 is provided in a manner that allows it to rotate integrally. The transmission gear 84 meshes with the pinion 71A of the rotating shaft 71. Furthermore, the left end of the output shaft 81 is configured as a tool mounting portion 81A. The tool mounting portion 81A is formed in a generally cylindrical shape, and a male thread is formed on its inner circumference. The saw blade 95 is mounted on the tool mounting portion 81A by inserting the blade mounting portion 95A at the center of the saw blade 95 externally into the tool mounting portion 81A and screwing the bolt BL into the tool mounting portion 81A. Thus, the output shaft 81 and the saw blade 95 are configured to rotate around the axis of the output shaft 81 by being driven by the motor 70.

[0086] Furthermore, the lower part of the saw blade 95 is covered by a protective cover 86. The protective cover 86 is formed in a generally semi-circular shape that bulges downwards when viewed from the right side, and is also formed in a concave shape that opens upwards. Additionally, the protective cover 86 is rotatably connected to the output shaft 81 about its axis. Furthermore, the protective cover 86 is subjected to force about the output shaft 81 via a force-applying spring (not shown) and is held in place. Figure 4 The position shown. Moreover, it is configured such that when cutting is performed using the cutting tool 10, the protective cover 86 rotates by overcoming the applied force of the force spring through the processing material, thereby exposing the blade part of the saw 95.

[0087] (Regarding Control Unit 90) as follows Figure 6 and Figure 8 As shown, the control unit 90 is housed within the protective portion 56 of the handle 50. The control unit 90 has a control board 91, which is formed into a generally rectangular plate with the thickness direction being the first inclined direction. The control board 91 is disposed inside the board holder 92 and held by the board holder 92. A switch mechanism 62 and a motor 70 are electrically connected to the control board 91. Thus, by actuating the trigger 60, the motor 70 is driven, and the saw blade 95 rotates about the axis of the output shaft 81.

[0088] (Effects and Effects) Next, the function and effects of the cutting tool 10 in this embodiment will be explained.

[0089] When using the cutting tool 10 configured as described above, the battery pack 100 is inserted into the battery housing 55 from the right side and mounted on the battery mounting / unmounting section 42 of the motor housing 40. The connector 101 of the battery pack 100 is then connected to the connector 48 of the battery mounting / unmounting section 42. The base 20 is then placed on the workpiece, and the trigger 60 is activated. This drives the motor 70, and the driving force of the motor 70 is transmitted to the saw blade 95 via the transmission mechanism 80, causing the saw blade 95 to rotate about the output shaft 81. The workpiece is then cut by sliding the base 20 on its upper surface.

[0090] Here, the cutting tool 10 is composed of the following components: a housing 30 housing the motor 70; and a handle 50 connected to the housing 30. The handle 50 is composed of the following components: a gripping part 51 for the operator to hold; a first connecting part 52 extending forward from one end (upper end) of the gripping part 51 and fixed to the main housing 32 of the housing 30; and a second connecting part 53 extending forward from the other end (lower end) of the gripping part 51 and fixed to the main housing 32. Thus, the housing 30 (part of the motor housing 40) and the handle 50 form a ring structure S. Specifically, the gripping part 51, the first connecting part 52, the housing 30, and the second connecting part 53 constitute the ring structure S. Furthermore, the battery pack 100, which is installed in the battery loading / unloading part 42 of the motor housing 40, is disposed inside the ring structure S. In other words, the battery housing part 55 for housing the battery pack 100 is disposed inside the ring structure S. According to this structure, firstly, since the first connecting part 52 is located above the battery pack 100 and the second connecting part 53 is located below, foreign objects can be prevented from contacting the battery pack 100 from above and below. Furthermore, since the battery pack 100 (battery housing 55) is disposed inside the annular structure S, the housing 30 and handle 50 function as surrounding parts that enclose the battery pack 100. Thus, for example, if the cutting tool 10, in which the battery pack 100 is installed, falls, direct contact between the battery pack 100 and the ground can be prevented. Therefore, the protection performance of the battery pack 100 installed in the battery mounting part 42 can be improved. In addition, since the battery mounting part 42 is provided in the motor housing 40, and the center position of the battery mounting part 42 is located higher and further back than the center position of the motor 70, the lower end position of the battery pack 100 can be located higher than the lower end position of the motor housing 40. Therefore, by integrating the battery mounting / unmounting part 42 with the motor housing 40, assemblability is improved, and the second connecting part 53 is easily positioned below the battery pack 100. Furthermore, space for fingers to be inserted is ensured below the battery pack 100, making the mounting and unmounting of the battery pack 100 easier. In this embodiment, since the locking member 103 is located below the battery pack 100 in its installed state, mounting and unmounting operations are easier. In this embodiment, when viewed in the left-right direction, the upper housing-side guide rail part 45 is closer to the center position (rotation axis 71) of the motor 70 in the front-back direction than the lower housing-side guide rail part 45, thereby suppressing the battery pack 100 from affecting the protrusion of the saw blade 95. In this embodiment, since the lower end of the battery pack 100 is located below the center position (rotation axis 71) of the motor 70 when viewed in the left-right direction, upward protrusion of the battery pack 100 is suppressed, and a compact structure is achieved.In addition, the battery pack 100 is configured such that when viewed in the left-right direction, the center of the battery pack 100 is located lower than the upper end of the motor housing 40, thus suppressing the upward protrusion of the battery pack 100.

[0091] Furthermore, in the handle 50, the grip portion 51 is located at the rear of the main body housing 32, specifically further rearward than the rear end of the base 20, and extends approximately along the second inclined direction when viewed from the side. Moreover, the front end (top end) of the first connecting portion 52 is fixed to the saw head portion 34 of the main body housing 32, and the front end (top end) of the second connecting portion 53 is fixed to the saw head portion 34 of the main body housing 32. Therefore, the grip portion 51, which is held by the operator, can be supported by the main body housing 32 at both ends along its length. Thus, compared to a structure where the front end of the second connecting portion 53 is not fixed to the main body housing 32, the support rigidity of the grip portion 51 can be improved. That is, in the case where the grip portion 51 is located further rearward than the rear end of the base 20, the handle 50 on the front side of the grip portion 51 can be fixed to the main body housing 32 even if only the first connecting portion is used. However, in this embodiment, since the connection (fixing) is performed at both the upper and lower parts, the fixing force of the handle 50 can be appropriately ensured. Therefore, the operability for the operator can be improved.

[0092] Furthermore, the handle 50 has a protective portion 56. The protective portion 56 connects the middle portion of the first connecting portion 52 along its length to the middle portion of the second connecting portion 53 along its length inside the annular structure S. The protective portion 56 is positioned between the battery pack 100 installed in the battery loading / unloading section 42 and the grip portion 51. Therefore, the protective portion 56 can prevent the operator's hand from accidentally touching the battery pack 100 while gripping the grip portion 51. Furthermore, even assuming that the operator's hand slips during operation of the cutting tool 10, the protective portion 56 can prevent the operator's hand from touching the battery pack 100.

[0093] Furthermore, as described above, the protective portion 56 connects the middle portion of the first connecting portion 52 and the middle portion of the second connecting portion 53 in the longitudinal direction within the annular structure S. Thus, the protective portion 56 also functions as a reinforcement for the handle 50. Therefore, the overall rigidity of the handle 50 can be improved by the protective portion 56. Additionally, the front ends of the first connecting portion 52 and the second connecting portion 53 are partially connected by a slot portion 55A. This further improves the overall rigidity of the handle 50.

[0094] Furthermore, the control unit 90 is housed inside the protective section 56. Therefore, it is unnecessary to house the control unit 90 within the first connecting section 52 and the second connecting section 53. This facilitates the miniaturization of the first connecting section 52 and the second connecting section 53. Additionally, by placing the control unit 90 inside the protective section 56, the control unit 90 can be positioned between the motor 70 and connector 48, and the switch mechanism 62 (trigger 60) located on the grip section 51 of the handle 50. This allows for easy routing of wiring from the motor 70, connector 48, and switch mechanism 62 to the control unit 90.

[0095] Furthermore, the saw blade 95 is formed as a circular plate with the thickness direction in the left-right direction. Moreover, the grip portion 51, the first connecting portion 52, and the second connecting portion 53 of the handle 50 extend in a direction orthogonal to the axis of the motor 70 when viewed from above. Thus, the grip portion 51, the first connecting portion 52, and the second connecting portion 53 extend parallel to the side surface of the saw blade 95. This prevents the handle 50 from becoming too large in the left-right direction, and also prevents the cutting tool 10 from becoming too large in the left-right direction.

[0096] Furthermore, the housing 30 comprises a main housing 32 for housing the saw blade 95 and a motor housing 40 for housing the motor 70, with the motor housing 40 fixed to the main housing 32. Moreover, the first connecting portion 52 and the second connecting portion 53 of the handle 50 are fixed to the main housing 32, and the battery mounting / unmounting portion 42 is disposed on the motor housing 40. That is, in the housing 30, the housing for fixing the handle 50 and the housing for the battery mounting / unmounting portion 42 are constructed from different housings. In other words, the separate handle 50 (handle housing) and the motor housing 40 with the battery mounting / unmounting portion 42 are interconnected via the main housing 32 supporting the saw blade 95. Therefore, for example, when an impact force is input to the handle 50 due to falling or other reasons, the impact force is mainly transmitted to the main housing 32. Thus, the transmission of the impact force to the motor housing 40 can be suppressed. Therefore, the protection performance of the battery pack 100 installed in the battery mounting / unmounting portion 42 can be further improved.

[0097] Furthermore, the motor 70, the battery mounting / unmounting portion 42 of the motor housing 40, and the grip portion 51 of the handle 50 are arranged sequentially toward one side of the first tilting direction when viewed from the left and right, and the base 20 is positioned below the motor housing 40 and the handle 50. Thus, the battery mounting / unmounting portion 42 can be detached from the upper side of the base 20. Therefore, the front end of the second connecting portion 53 of the handle 50 can be positioned below the battery mounting / unmounting portion 42 and fixed to the main housing 32.

[0098] Furthermore, the motor housing 40 is composed of a divided housing portion 40A and a divided housing portion 40B, which are divided in a second inclined direction. Housing-side guide rail portions 45 are formed in both the divided housing portion 40A and the divided housing portion 40B, and these housing-side guide rail portions 45 form part of the battery mounting / unmounting portion 42. Therefore, the housing-side guide rail portions 45 can be easily formed in the motor housing 40.

[0099] Furthermore, a concave battery receiving portion 55 opening to the right is formed in the handle 50, and the battery receiving portion 55 is disposed on the upper side of the top end of the second connecting portion 53 of the handle 50. That is, the battery receiving portion 55 and the battery pack 100 can be disposed separately from the upper side of the base 20. In other words, a gap can be provided between the battery pack 100 and the base 20. As a result, the operator's fingers can be inserted into the gap to grip the battery pack 100. In addition, when the battery pack 100 is received in the battery receiving portion 55, the locking member 103 of the battery pack 100 is disposed on the sides of the battery pack 100 in the second inclined direction. As a result, the locking member 103 can be exposed to the gap G between the battery pack 100 and the base 20. Therefore, even if the battery pack 100 is installed from the right side, the removal performance of the battery pack 100 can be improved.

[0100] Furthermore, with the battery pack 100 housed in the battery receiving compartment 55, the depth of the battery receiving compartment 55 is set such that the locking member 103 of the battery pack 100 protrudes to the outside of the battery receiving compartment 55. This further improves the removal capability of the battery pack 100. Additionally, with the battery pack 100 housed in the battery receiving compartment 55, the depth of the battery receiving compartment 55 is set such that the right end of the battery pack 100 does not protrude further to the right than the right end of the motor housing 40. This maintains the protective performance of the battery pack 100, and the battery receiving compartment 55 is formed in the handle 50.

[0101] Furthermore, a recessed portion 43 is formed at the right end of the motor housing 40, which is open on the right side and one side of the first inclined direction when viewed from the second inclined direction. A battery storage portion 55 with a handle 50 is disposed on one side of the motor housing 40 in the first inclined direction. Therefore, when the battery pack 100 is housed in the battery storage portion 55, a worker's hand can be positioned within the recessed portion 43 to hold the battery pack 100. This improves the ease of installation of the battery pack 100.

[0102] Furthermore, on the left and right side walls of the handle 50, at the location of the protective portion 56, curved ridges 58 extending along a second inclined direction are formed, with the curved ridges 58 extending from the first connecting portion 52 to the second connecting portion 53. This effectively enhances the protective function of the protective portion 56 in supporting the handle 50.

[0103] Furthermore, for example, when an impact force is input to the grip portion 51 of the handle 50 due to a fall, the impact force can be transmitted along the curved ridge 58 to the outer periphery of the first connecting portion 52 and the second connecting portion 53. That is, the impact force can be dispersed to the outer periphery of the first connecting portion 52 and the second connecting portion 53 by the curved ridge 58. Therefore, the transmission of the impact force to the motor housing 40 and the battery mounting portion 42 can be effectively suppressed.

Claims

1. A type of operating machinery, comprising: Housing that houses the motor; The handle is attached to the housing; as well as A battery mounting section is provided in the housing, and the battery is mounted in a manner that allows the battery supplying power to the motor to be installed and removed. The housing is comprised of the following components: Motor housing, which houses the motor; and The main housing houses the tip tool and is connected to the motor housing. The tip tool is connected to the motor and rotates via the motor. The handle is comprised of the following components: The grip section allows the operator to hold it; The first connecting portion extends from one end of the grip portion toward the side of the main body housing and is connected to the main body housing; as well as The second connecting portion extends from the other end of the grip portion toward the side of the main body housing and connects with the main body housing. At least a portion of the first connecting portion is located above the battery, and at least a portion of the second connecting portion is located below the battery, so as to overlap with the battery in the vertical direction. The battery loading and unloading part is disposed on the motor housing, and the handle is fixed to the main body housing. The motor housing and the main body housing are different housings.

2. The operating machinery according to claim 1, wherein, The handle and the housing form a ring structure, and the battery installed in the battery mounting section is disposed inside the ring structure.

3. The operating machinery according to claim 2, wherein, The handle has a protective part. The protective part connects the middle portion of the first connecting part in the longitudinal direction and the middle portion of the second connecting part in the longitudinal direction inside the annular structure, and is disposed between the battery and the gripping part installed in the battery loading and unloading part.

4. The operating machinery according to claim 3, wherein, The control unit for controlling the motor is housed inside the protective section.

5. The working machinery according to any one of claims 1 to 4, comprising a top-end tool connected to and rotated by the motor. The grip, the first connecting portion, and the second connecting portion extend in a direction orthogonal to the axis of the motor when viewed from above.

6. The operating machinery according to claim 1, wherein, The motor has a rotating shaft that rotates about the left-right axis, and The motor housing has a motor housing portion that houses the motor, and a fixing portion on one end in the left-right direction. The fixing portion fixes the motor housing portion to the main body housing. The battery mounting / unmounting portion is connected to the main body housing via the fixing portion. The handle is connected to the main body housing without passing through the fixing portion.

7. The operating machinery according to claim 6, wherein, The direction orthogonal to the vertical direction is defined as the first direction, and the direction orthogonal to both the first direction and the vertical direction is defined as the second direction. The motor is configured with the first direction as its axial direction. The motor, the battery mounting / unmounting part, and the gripping part are arranged sequentially along a first tilting direction that tilts upwards as it moves toward one of the second directions when viewed from the first direction. A base that can slide on the workpiece is disposed on the lower side of the motor and the handle.

8. The operating machinery according to claim 7, wherein, The motor housing, when viewed from the first direction, is composed of segmented housing portions that are divided in a second inclined direction orthogonal to the first inclined direction. The divided housing portion is provided with a pair of housing side guide rails that form part of the battery loading and unloading portion and engage with the battery.

9. The operating machinery according to claim 1, wherein, The first connecting part and the second connecting part are connected to the main body housing in such a way that they are clamped into the motor housing in the vertical direction.

10. A type of operating machinery, comprising: Motor housing, which houses the motor; The circular saw blade is rotated by the motor. The base is located below the motor housing and has a through hole for at least a portion of the circular saw blade to protrude downwards; The handle is connected to the motor housing; as well as A battery loading and unloading section is provided in the motor housing, and the battery is installed in a manner that allows the battery supplying power to the motor to be loaded and unloaded. In the operating machinery, The handle is comprised of the following components: The grip is located at the rear of the motor housing and is designed for the operator to hold. A first connecting portion extends forward from the upper end of the gripping portion; The second connecting part extends forward from the lower end of the gripping part, and The battery mounting / unmounting section is configured to support the battery in an inclined direction relative to the lower surface of the base, such that the lower end of the battery is positioned above the lower end of the motor housing. The first connecting portion is disposed above the battery, and the second connecting portion is disposed below the lower end of the battery.

11. The operating machinery according to claim 1 or 10, wherein, The battery loading and unloading section has two battery support sections. One of the battery supports located on the upper side is closer to the center of the motor in the front-rear direction than the other battery support located on the lower side.

12. The operating machinery according to claim 11, wherein, The battery support is a guide rail that extends in the left-right direction.

13. The operating machinery according to claim 10, wherein, The battery loading and unloading section has a pair of guide rails to support the battery. The pair of guide rails are separated from each other in the vertical direction. The upper guide rail is located in front of the lower guide rail.

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