CN105643567B - Impact tool - Google Patents

Abstract

The invention provides a more reasonable structure capable of preventing vibration during impact operation. A drive motor (110) and an impact component (140) are provided on a first main component (101a), a handle portion (109) and a battery mounting portion (160) are provided on a second main component (101b), and when vibration is generated in association with driving of the impact component (140), the first main component (101a) and the second main component (101b) are relatively moved by the urging member (181), and a first region (100a) close to the impact component (140) has a longer moving distance in the longitudinal direction than a second region (100b) away from the impact component (140), and the first region (100a) forms a long-distance moving region (200).

Description

Impact tool

Technical Field

The present invention relates to an impact tool for performing an impact operation on a workpiece.

Background

Japanese patent application laid-open No. 2006-175588 discloses an impact tool having an impact mechanism for moving a tip tool in an impact shaft direction, a transmission case for holding the impact mechanism, and a housing provided with a handle for a user to grasp. In the impact tool, a transmission case and a housing are connected by two elastic members so that the transmission case and the housing can relatively move in the direction of an impact shaft to suppress vibration caused by driving an impact mechanism.

[ SUMMARY OF THE INVENTION ]

[ problem ] to solve the problems

When the impact mechanism is driven, a large vibration occurs along the impact shaft, and therefore the mechanism that relatively moves the transmission case and the housing in the direction of the impact shaft has a certain effect of suppressing the vibration. On the other hand, in the impact tool, there remains vibration that cannot be suppressed by this mechanism, and there is a demand for further improvement.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an impact tool having a more rational structure and capable of preventing vibration during actual impact work.

[ MEANS FOR SOLVING PROBLEMS ] to solve the problems

In order to solve the above problem, according to a preferred embodiment of the present invention, the present invention relates to an impact tool for driving a tool bit to perform a linear motion to perform an impact operation on a workpiece. As a specific example of the impact tool, there is an electric hammer which linearly moves a tip tool to break a workpiece such as concrete.

The impact tool includes a main body, a tip tool mounting portion extending in a predetermined longitudinal direction, a drive motor having an output shaft axis intersecting the longitudinal direction, an impact structural element driven by an output of the drive motor and having an impact shaft parallel to the longitudinal direction, a handle portion grasped by a user, and a battery mounting portion to which a battery for supplying power to the drive motor is mounted. The direction of the output shaft axis is the same as the direction of extension of the shaft of the drive motor. The impact structural element includes, for example, a piston driven by a drive motor to reciprocate linearly, an impact member, and an air chamber formed between the piston and the impact member. In this case, when the piston moves toward the tool tip side, the air in the air chamber is compressed. As the compressed air expands, the impact member moves to collide with the tip tool, thereby moving the tip tool in the longitudinal direction. When the piston moves in the direction opposite to the tool bit, the air in the air chamber expands, and the impact member moves in the direction opposite to the tool bit as the expanding air is compressed. Therefore, the tip tool moves linearly as the piston reciprocates. In the impact tool according to the present invention, an intermediate member may be provided between the impact member and the tip tool. When the impact structural element has the above-described structure, the direction of the impact shaft is the same as the direction in which the piston is reciprocally driven. The impact axis is parallel to the long axis direction. In this case, the impact shaft (impact shaft axis) may pass through any region of the piston. In the case where the tip tool is attached to the tip tool attachment portion, the impact shaft passing through the center of the tip tool is referred to as a central impact axis.

In the impact tool according to this aspect, the main body includes a first main body component, a second main body component, and a biasing member that biases the first main body component and the second main body component.

The biasing member may be formed of a spring component, for example, a coil spring. When a coil spring is used as the biasing member, the coil spring can bias the first and second main body components by fixing one end of the coil spring to the first main body component and fixing the other end of the coil spring to the second main body component.

The biasing member preferably biases the first main body component and the second main body component in a direction to separate the two components from each other. As a result, when the first and second main body components move in the direction of approaching each other, the first and second main body components can be effectively prevented from colliding with each other, and the main body can be prevented from being damaged.

The main body further includes a first region close to the impact component and a second region farther from the impact component than the first region. The "approaching" and "separating" from the impact structural element are defined by, for example, the straight-line distances between two arbitrary points on the main body in the direction intersecting the longitudinal axis and predetermined points on the impact structural element, respectively (the straight-line distance is "approaching" when the straight-line distance is short, and the straight-line distance is "separating" when the straight-line distance is long). That is, in the intersecting direction, a region where a point having a short distance from a predetermined point on the impact structural element is located may be defined as a first region, and a region where a point having a long distance from a predetermined point on the impact structural element is located may be defined as a second region.

The first main component is provided with a drive motor and an impact component, and the second main component is provided with a handle portion and a battery mounting portion.

The impact tool according to the present embodiment further includes a vibration-proof mechanism that suppresses vibration generated as the impact component is driven. The vibration-proof mechanism is configured such that, when vibration is generated as the impact component is driven, the first and second main body components are relatively reciprocated by the biasing member, thereby switching between a separated state of the first and second main body components and a close state of the first and second main body components.

The distant state and the close state between the first main component and the second main component will be described. First, a predetermined point of the first main component and a predetermined point of the second main component are set in the longitudinal direction. The distance between the predetermined point of the first main component and the predetermined point of the second main component is set as the first position predetermined distance. Next, in a state where the first main body component and the second main body component are relatively moved, a distance between a predetermined point of the first main body component and a predetermined point of the second main body component is set as a second position predetermined distance. Further, the first position specified distance is set longer than the second position specified distance. In this case, the positional relationship between the first main structural element and the second main structural element forming the first position at the predetermined distance is "in the distant state". The positional relationship between the first main structural element and the second main structural element forming the second position at a predetermined distance is in an "approaching state".

In the impact tool according to the present embodiment, when the first and second body components move and are switched from the spaced-apart state to the close state, the first region has a longer moving distance in the longitudinal direction than the second region, and the first region constitutes the long-distance moving region.

According to the impact tool of the present embodiment, the first region strongly affected by the vibration of the impact component is moved by a longer distance than the second region, and the long-distance movement region is formed by the first region, whereby vibration can be effectively prevented. When the first and second main components are moved to be switched from the spaced-apart state to the close state, the second region has a shorter moving distance in the longitudinal direction than the first region, and the second region constitutes a short-distance moving region. That is, the vibration isolation mechanism has both a long-distance movement region and a short-distance movement region, and can more effectively suppress vibration generated by driving the impact component.

In another embodiment of the impact tool according to the present invention, the impact tool has a center of gravity position in a state where the battery is mounted on the battery mounting portion, and the first main component and the second main component rotate relative to each other about the rotation axis.

In this structure, the axis of the rotation shaft may be disposed closer to the center of gravity than the impact shaft. In addition, the state in which the rotation axis is closer to the center of gravity position than the impact shaft means that, for example, assuming a line passing through the center of gravity position and perpendicularly intersecting the impact shaft, and setting an intersection point between the assumed line and the impact shaft, in this case, the distance from the rotation axis to the center of gravity position is shorter than the distance from the rotation axis to the intersection point. With this configuration, the moving distance between the first main body component and the second main body component in the long-distance moving region (first region) can be increased.

Further, a part of the vibration generated by driving the impact component may be converted into vibration in a rotational direction around the center of gravity of the impact tool. In this case, according to this structure, the vibration of the impact tool in the rotational direction can be effectively suppressed.

In another embodiment of the impact tool according to the present invention, the first main component includes a first covering region covered with the second main component and an exposed region not covered with the second main component. That is, the first body region and the second body region have a laminated region overlapping each other. In the laminated region, one of the covered outer sides constitutes an exposed region, and the covered one constitutes a covered region. In this sense, the exposed region may be configured not to cover other main body elements.

In such a configuration, the drive motor may be disposed in the first coverage area. I.e. so that the drive motor is protected by the second body region inside the impact tool.

In another embodiment of the impact tool according to the present invention, the drive motor may be provided in the motor holding portion. In this case, the first main structural element may be integrated with the motor holding portion. The first main body component is integrated with the motor holding portion, and means that when the first main body component moves relative to the second main body component, the motor holding portion moves relative to the second main body component together with the first main body component by fixing the motor holding portion to the first main body component by the fixing member. In such a configuration, it is possible to provide a configuration in which the first main structural element and the drive motor are easily assembled.

In another embodiment of the impact tool according to the present invention, a shaft member for defining a rotation axis may be formed on the motor holding portion. In this case, the rotational shaft axis is configured by fixing the motor holding portion having the shaft member to the first main structural element, and therefore, the manufacturing efficiency can be further improved.

In another embodiment of the impact tool according to the present invention, the second main component has a second covering region covered with the first main component. In this case, the end edge region on the distal end tool holding portion side of the second main structure element may be defined as the second covering region.

In the impact operation, dust generated from the workpiece during the operation with the tool bit is scattered from the tool bit toward the grip portion. In this situation, when the region on the tip tool holding portion side of the second main body component is set as the second covering region, there is an effect of preventing the dust from entering the second main body component. In this sense, it can be said that the second cover region and the region of the first main body structural element covering the second cover region constitute a dust-proof mechanism.

In another embodiment of the impact tool according to the present invention, the direction in which the urging member urges the first and second main body components may be aligned with the impact axis. With this configuration, the urging member can more easily receive the vibration generated by the driving of the impact component, and the relative movement between the first main body component and the second main body component can be more effectively promoted.

In addition, a typical example in which the urging direction of the urging member coincides with the impact axis is to provide the urging member coaxially with the central impact axis. In addition, in the case where the urging member is not provided coaxially with the central impact axis, a part of the urging member may be provided on the impact shaft.

The urging member may be disposed in such a manner that the long axis of the urging member is parallel to the impact shaft, or the long axis of the urging member intersects the impact shaft, or the urging member may be disposed so as to overlap the impact shaft while being bent.

In another embodiment of the impact tool according to the present invention, the impact tool includes a restriction portion that restricts movement of the first main body component and the second main body component in the approaching direction. The restricting portion is formed inside the main body. In this case, collision between the outer contours (the exposed regions) of the first and second main structural elements can be prevented. In this sense, it can be said that the restricting portion constitutes a collision preventing structure that prevents a collision between the exposed regions of the first and second main structural elements.

In another embodiment of the impact tool according to the present invention, the regulating portion may also serve as a guide portion for guiding the relative movement between the first main body component and the second main body component. The guide portion may be configured to bring predetermined regions of the first and second body components into contact with each other to slide the first and second body components. By using the restricting portion also as the guide portion, the structure can be simplified and the first and second main body components can be easily assembled.

In another embodiment of the impact tool according to the present invention, an air inlet may be provided at one end of the drive motor, and an air outlet may be provided at the other end. The main body may further include an air circulation suppressing mechanism. The air circulation suppressing mechanism is provided inside the main body between the air inlet and the air outlet, and restricts circulation of air between the air inlet and the air outlet.

In addition, in order to facilitate the intake of air from the air intake port and the discharge from the air discharge port, a fan may be provided on a drive shaft of the drive motor. Further, a main body intake port may be provided in a region closer to the intake port than the exhaust port, and a main body exhaust port may be provided in a region closer to the exhaust port than the intake port, in the second main body component covering the drive motor.

In the present invention, the drive motor moves together with the first main body component relative to the second main body component. Therefore, a space that allows the drive motor and the second main component to rotate relative to each other is formed between the drive motor and the second main component covering the drive motor. This space is referred to as a rotation-allowable space. The air sucked from the air inlet through the air inlet of the main body is heated by the heat inside the driving motor and exhausted from the air outlet. However, due to the structure of the rotation-allowable space, the air discharged from the air outlet may not be discharged from the main body air outlet, but may rise in the rotation-allowable space and be sucked in again by the air inlet. According to the impact tool of the present embodiment, by providing the air circulation suppressing mechanism, it is possible to suppress the occurrence of a phenomenon (air circulation phenomenon in the allowable rotation space) in which the air discharged from the air outlet is sucked again by the air inlet, and it is also possible to promote the cooling of the drive motor.

In another embodiment of the impact tool according to the present invention, the air circulation suppressing mechanism may be formed of a wall-like member. In this case, the wall-like member blocks the movement of the air discharged from the air outlet to the air inlet. That is, the air discharged from the exhaust port is not returned to the intake port but discharged from the body exhaust port. The wall-like member may extend from the second main structural element covering the drive motor, or may extend from the motor holding portion. In this case, the wall-like member may be integrally extended from the second main body component or a predetermined region of the motor holding portion. The wall-like member may be a member separate from the second main body component or the motor holding portion, and may be configured to be attached to a predetermined region of the second main body component or the motor holding portion.

The position of the axis of the rotating shaft may be set on the extended surface of the wall-like member. The wall-like member has facing surfaces and an intermediate portion between the facing surfaces. In this sense, the extension surface of the wall-like member means a surface which, assuming that the wall-like member is extended, passes through either one of both surfaces or the middle portion of the wall-like member while being parallel to the extension direction of the wall-like member. By positioning the extended surface of the wall-like member on the axis of the rotation axis which is the center of rotation of the first and second main components, the allowable rotation space at the distal end portion of the wall-like member can be reduced. Therefore, the air flowing from the exhaust port to the intake port can be blocked more effectively.

Further, the wall-like member is not necessarily provided so as to entirely surround the peripheral region of the drive motor. For example, in the respective regions of the second main body component and the drive motor located on the axis of the rotation shaft, it is not necessary to provide an allowable rotation space required for the rotation of the first main body component and the second main body component. Therefore, in this region, the second main structural element and the drive motor can be disposed close to each other, and thus, it is not necessary to provide a wall-like member in this region. In this configuration, the air circulation suppressing mechanism is constituted by the second main component located on the axis of the rotating shaft and the respective regions on the drive motor.

In this structure, the wall-like member may be provided in a region that perpendicularly intersects the axis of the rotary shaft and the axis of the output shaft of the drive motor and overlaps the axis of the rotary shaft.

In another embodiment of the impact tool according to the present invention, the first main component and the second main component have an overlapping region overlapping each other. Further, the overlapping area is formed by the first exposed area and the second covered area, or by the first covered area and the second exposed area. That is, the laminated region constitutes an overlapping region.

The overlapping region has a flexible member provided on either one of the first main body component and the second main body component. The flexible member is provided on the first main structure element or the second main structure element, thereby constituting a part or all of the covering region or the exposed region. Further, the flexible member is provided on any one of the first cover region, the first exposed region, the second cover region, and the second exposed region. The flexible member may be constructed of a highly elastic material.

The overlap region has a region to be slid which is provided in the other of the first and second main body components and which is brought into sliding contact with the flexible member when the first and second main body components reciprocate relative to each other. That is, the slid area is provided in any one of the first covered area, the first exposed area, the second covered area, and the second exposed area in which the flexible member is not provided. That is, the slid area is provided in the area where the flexible member is not provided.

According to the impact tool of the present invention, the flexible member is provided on one of the first and second main structural elements in the overlap region, and the region to be slid is provided on the other. Thus, the gap formed between the first and second body structure elements in the overlap region may be blocked by the flexible member. Therefore, the flexible member can suppress the intrusion of dust generated during the operation into the main body. In this sense, it can be said that the flexible member and the slid region constitute a dust-proof mechanism.

In another embodiment of the impact tool according to the present invention, the flexible member may constitute one of the first cover region and the second cover region. In this case, only the flexible member constitutes either the first coverage area or the second coverage area. The first covering region or the second covering region may be constituted by the flexible member and the first main structural element or by the flexible member and the second main structural element.

In addition, another embodiment of the impact tool according to the present invention may be configured by the second main component.

In another embodiment of the impact tool according to the present invention, when the first body component and the second body component are combined, the flexible member is elastically deformed by the first body component or the second body component in which the slid area is formed. In this case, the first main structural element may have a cylindrical region with an opening, and the second main structural element may have an insertion region into which the cylindrical body is inserted from the opening at the time of assembly. In this structure, in a state where the assembly is completed, a region of the second main body component into which the first main body component is inserted constitutes a second covering region, and a region around the opening of the first main body component covering the second covering region constitutes a first exposed region. In addition, the cylindrical area also accommodates the impact structural elements.

According to the impact tool of the present embodiment, when the second main structural element is inserted into the first main structural element, the flexible member is deformed, and therefore, the assembly work is facilitated.

Further, the second main structural element may be divided into two parts, which are referred to as a first side second main structural element and a second side second main structural element. In this structure, first, the first main body component is assembled with the second main body component on one side, and then, the second main body component on the other side is assembled with the first main body component and the second main body component on one side. In this case, for example, when the flexible member is provided in the insertion region of the second main body structure element on the other side, when the insertion region of the second main body structure element on the other side is inserted into the opening of the first main body structure element, the flexible member is deformed by being in contact with the peripheral region of the opening. Therefore, when the second main component is assembled with the first main component, the assembling work can be easily performed. When the flexible member of the second main body component is inserted into the tubular portion in a deformed state and the second main body component is further moved relative to the first main body component, the flexible member of the second main body component is guided by the deformed flexible member to move toward the first main body component. Therefore, the second main structural element on the other side can be smoothly assembled with the first main structural element. In this sense, it can be said that the flexible member constitutes a guide portion when the first body component and the second body component 1 are assembled.

In another embodiment of the impact tool according to the present invention, the flexible member may be integrally molded with one of the first and second main structural elements in the overlap region.

According to the impact tool of the present embodiment, the flexible member can be easily configured.

Further, a grip portion of the second main component may be provided with a slip prevention portion formed of an elastic body. In this case, the slip-preventing portion and the flexible member may be formed continuously, and the second main structural element may be integrally molded with the slip-preventing portion and the flexible member. In this structure, the second main structural element, the flexible member, and the nonslip portion can be easily formed.

[ Effect of the invention ]

According to the present invention, a more rational structure can be provided to prevent vibration during actual impact work.

Drawings

Fig. 1 is a schematic view of an impact tool according to a first embodiment of the present invention.

Fig. 2 is a sectional view showing a drive mechanism of a tool bit in an impact tool according to a second embodiment of the present invention.

Fig. 3 is a sectional view showing the vibration preventing mechanism in the impact tool.

Fig. 4 is a sectional view taken along line I-I in fig. 3.

Fig. 5 is a sectional view taken along line II-II in fig. 3.

Fig. 6 is a sectional view taken along the line III-III in fig. 3.

Fig. 7 is a schematic view of the operation of the impact tool.

Fig. 8 is a sectional view taken along line IV-IV in fig. 7.

Fig. 9 is a schematic view showing an external appearance of an impact tool according to a third embodiment of the present invention.

Fig. 10 is a perspective view schematically showing a drive motor in the impact tool.

Fig. 11 is a schematic view showing an air circulation suppressing mechanism in the impact tool.

Fig. 12 is a schematic view showing an external appearance of an impact tool according to a fourth embodiment of the present invention.

Fig. 13 is a sectional view taken along line V-V in fig. 12.

Fig. 14 is a schematic view showing a state of assembling and mounting the impact tool.

Fig. 15 is a schematic view showing an overlap region of an impact tool according to a fifth embodiment of the present invention.

Fig. 16 is a schematic view showing an external appearance of an impact tool according to a sixth embodiment of the present invention.

[ description of reference ]

100: hammer drills (impact tools); 100 a: a first region; 100 b: a second region; 100 c: a position of a center of gravity; 101: a main body portion (tool body); 101 a: a first major structural element; 101a 1: a first coverage area; 101a 2: a first exposed region (exposed region); 101 aa: a rear side end edge; 101 ab: an opening; 101 ac: a cylindrical portion; 101 b: a second major structural element; 101b 1: a second coverage area; 101b 2: a second exposed region; 101b 3: a support plate; 101 ba: a tip opening region; 101 bb: a body region; 101 bc: a step portion; 101 bd: a second right body structural element; 101 be: a left second major structural element; 101 bf: an insertion region; 101 c: a fixing member; 101 d: a protective member; 103: a motor housing; 104: an inner shell; 104 a: a force application member support portion; 104 b: a fixing member; 105: a transmission housing; 109: a handle (handle portion); 109 a: a trigger; 109 b: a switch; 110: an electric motor (drive motor); 110 a: a motor case (motor holding portion); 110 b: a fixing member; 111: a drive shaft; 111 a: an output shaft axis; 111 b: a pinion gear; 119: hammer heads (tip tools); 120: a motion conversion mechanism; 121: an intermediate shaft; 122: a bevel gear; 123: a rotating body; 125: a swinging member; 125 a: a bearing; 127: a piston; 127 a: an air chamber; 129: a cylinder; 140: an impact structural element (impact mechanism); 140 a: a central impact axis; 143: a ram; 145: knocking a bolt; 150: a rotational power transmission mechanism; 151: a first gear; 153: a second gear; 159: a jig (tip tool mounting portion); 159 a: a hammer head is inserted into the hole; 160: a battery mounting portion; 161: a battery pack (battery); 170: a switching mechanism; 171: an operation panel; 180: a vibration-proof mechanism; 181: a force application member; 182: a rotational axis; 182 a: a first shaft support portion; 182 b: a second shaft support; 182 c: a shaft member; 190: a restricting section; 191: a first confinement region; 191 a: a front side wall portion; 191 b: an extension portion; 191 c: a rear side wall portion; 192: a second confinement region; 192 a: a front side reinforcing rib; 192 b: a middle reinforcing rib; 192 c: a rear side reinforcing rib; 193: a slide guide portion (guide portion); 200: a long-distance moving area; 210: a short-distance movement area; 300: an air circulation suppressing mechanism; 301: a main body air inlet; 302: a main body exhaust port; 303: a motor air inlet (air inlet); 304: a motor exhaust port (exhaust port); 305: a fan; 306: a motor case air inlet; 307: a motor case exhaust port; 310: a wall-like member; 311: a first wall-like member; 311 a: an extension surface; 312: a second wall-like member; 312 a: an extension surface; 320: a rotation allowance space; 400: an overlap region; 410: a flexible member placement region; 410 a: a front side protrusion; 410 b: a rear side protrusion; 411: a flexible member; 411 a: a boss portion; 411 b: a recessed portion; 411 c: an extension; 411 d: a protrusion; 420: a slid area; 430: and a dust-proof mechanism.

Detailed Description

An impact tool according to first to sixth embodiments will be described with reference to fig. 1 to 16. Fig. 1 is a first embodiment, fig. 2 to 8 are second embodiments, fig. 9 to 11 are third embodiments, fig. 12 to 14 are fourth embodiments, fig. 15 is a fifth embodiment, and fig. 16 is a sixth embodiment. In the description of the first to sixth embodiments, the same names and symbols are used for the same or similar members or mechanisms having the same functions, and redundant description is omitted.

(first embodiment according to the present invention)

A first embodiment according to the present invention will be described with reference to fig. 1. The first embodiment is a detailed description of the overall configuration of the present invention, and relates to the configurations of the second to sixth embodiments described below.

The impact tool 100 has a tool attachment portion 159 to which the tool bit 119 is attached and a battery attachment portion 160 to which the battery 161 is attached, and performs an impact operation on a workpiece by driving the tool bit 119 to move linearly. The tip tool mounting portion 159 is configured to enable mounting and dismounting of the tip tool 119. The longitudinal direction of the tip tool attachment portion 159 is the longitudinal direction of the impact tool 100. The longitudinal direction is parallel to the tip tool drive axis when the tip tool is driven. The battery mounting portion 160 is configured to be attachable and detachable to and from the battery 161.

For convenience of explanation, it is specified that the distal end side of the distal end tool mounting portion 159 in the longitudinal direction is a front side, and the side opposite to the front side is a rear side. In the intersecting direction in the longitudinal direction, the side provided with the tip tool attachment portion 159 is defined as the upper side, and the side provided with the battery attachment portion 160 is defined as the lower side. The definition of the direction on the drawing sheet corresponds to the front side, the rear side, the upper side, and the lower side in the impact tool 100 on the right side, the left side, the upper side, and the lower side in fig. 1, respectively.

The impact tool 100 includes a main body 101, a tool attachment portion 159, an output shaft axis 111a intersecting the longitudinal direction, a drive motor 110 driven by the current of a battery 161, an impact component 140 driven by the output (power) of the drive motor 110, a grip 109 grasped by a user, and a battery attachment portion 160. The output shaft axis 111a is an extending direction of the transmission shaft 111 of the drive motor 110. In a state where the battery 161 is attached to the battery attachment portion 160, the center of gravity position 100c of the impact tool 100 is located on the drive motor 110. The handle portion 109 is provided with a trigger 109a, and the trigger 109a is used to adjust the amount of current supplied from the battery 161 to the drive motor 110.

The main body 101 is mainly composed of a first main body component 101a and a second main body component 101 b. The first main component 101a is provided with a drive motor 110 and an impact component 140, and the second main component 101b is provided with a handle portion 109 and a battery mounting portion 160. The first main component is further provided with a motor holding portion 110a, and the motor holding portion 110a surrounds the drive motor 110. With this structure, the first main component 101a is integrated with the drive motor 110.

The first and second main components 101a and 101b are provided with exposed regions exposed to the outside of the impact tool 100. Further, there is a laminated region where the first main component 101a and the second main component 101b are overlapped with each other. In the laminated region, one of the layers covering the outside constitutes an exposed region, and the other layer covering the exposed region constitutes a covered region. In the laminated region, the region of the first main component 101a covered by the second main component 101b constitutes a first covered region 101a 1. The region of the second main body component 101b covered by the first main body component 101a constitutes a second covered region 101b 1. The region of the first main body component 101a not covered by the second main body component 101b constitutes a first exposed region 101a2, and the region of the second main body component 101b not covered by the first main body component 101a constitutes a second exposed region 101b 2.

The drive motor 110 is disposed in the first coverage area 101a 1. That is, the drive motor 110 is covered by the second exposed region 101b 2.

The second main body component 101b has a distal end opening region 101ba, which is a region having an opening on the distal end side. The region of the second main structural element 101b that does not belong to the distal opening region 101ba is defined as the main region 101 bb. The rear-side end edge 101aa of the first main structural element 101 covers the tip-side end edge of the tip opening region 101 ba. That is, the end edge region of the second main component 101b on the side of the distal end tool mounting portion 159 is the second covering region 101b 1. With this structure, dust scattered from the tool bit 119 toward the grip portion 109 during impact operation can be prevented from entering the second body component 101b 2. In this sense, the region including the rear end edge 101aa of the first main component 101a and the second covering region 101b1 covered by the region constitute the dust-proof mechanism 430. In addition, as the dust-proof mechanism 430, the distal end region of the second main body component 101b is an insertion region into which the first main body component 101a is inserted.

A stepped portion 101bc is formed on the boundary between the distal opening region 101ba and the main body region 101 bb.

The impact tool 100 includes the vibration isolation mechanism 180, and the vibration isolation mechanism 180 can suppress vibration generated as the impact component 140 is driven. The vibration isolation mechanism 180 causes the first and second main components to reciprocate relative to each other by vibration generated by driving the impact component 140, and switches between a state in which the first and second main components 101a and 101b are separated from each other and a state in which the first and second main components are close to each other.

Further, as a specific example of the impact component 140, there is a configuration including a piston linearly reciprocated by the driving motor 110, an impact member, and a gas chamber formed between the piston and the impact member. In this case, when the piston moves toward the tool tip side, the air in the air chamber is compressed. As the compressed air expands, the impact member moves to collide with the tip tool, thereby moving the tip tool. When the piston moves to the side opposite to the tool bit, the air in the air chamber expands, and the impact member moves to the side opposite to the tool bit as the expanding air is compressed. With this reciprocating movement of the piston, the tip tool linearly moves along the tip tool drive axis. Further, an intermediate member may be provided between the impact member and the tip tool 119. When the impact component 140 having such a structure is driven, vibration occurs in the longitudinal direction. The direction in which the piston reciprocates is defined as the direction of the striking shaft. The impact shaft (impact shaft axis) may pass through any region of the piston. When the tip tool 119 is attached to the tip tool attachment portion 159, the impact shaft passing through the center of the tip tool 119 is referred to as a central impact axis 140 a.

The main body 101 has a first region 100a close to the impact component 140 and a second region 100b farther from the impact component 140 than the first region 100 a. For example, when two arbitrary points in the direction intersecting the longitudinal direction of the body 101 are connected to predetermined points on the impact component 140, the "approaching" and "separating" from the impact component 140 are defined by the straight line distances between the respective points. That is, in the intersecting direction, the distance between the point of the first region 100a and the predetermined point on the impact component 140 is short, and the distance between the point of the second region 100b and the predetermined point on the impact component 140 is long.

When the first main component 101a and the second main component 101b move and come close to each other from a state of being away from each other, the moving distance of the first region 100a in the longitudinal direction is longer than the moving distance of the second region 100b in the longitudinal direction, and the first region 100a constitutes the long-distance moving region 200. With this configuration, the first region 100a that is strongly affected by the vibration of the impact component 140 can be effectively protected from vibration by the long-distance movement region 200. When the first and second main components 101a and 101b move and come close to each other from a state of being away from each other, the moving distance of the second region 100b in the longitudinal direction is shorter than the moving distance of the first region 100a in the longitudinal direction, and the second region 100b constitutes the short-distance moving region 210. That is, the vibration-proof mechanism 180 has both the long-distance movement region 200 and the short-distance movement region 210, and therefore vibration having complicated directivity can be effectively suppressed.

Here, the "close state" and the "distant state" of the first main component 101a and the second main component 101b will be described. First, a predetermined point of the first main component 101a and a predetermined point of the second main component 101b are specified in the longitudinal direction. The distance between the predetermined point of the first main component 101a and the predetermined point of the second main component 101b is referred to as a first position predetermined distance. Next, in a state where the first main body component 101a and the second main body component 101b are relatively moved, a distance between a predetermined point of the first main body component 101a and a predetermined point of the second main body component 101b is referred to as a second position predetermined distance. The first position specified distance is longer than the second position specified distance. In this case, the positional relationship between the first main component 101a and the second main component 101b forming the first position at a predetermined distance is "separated state". The first and second main components 101a and 101b forming the second position at a predetermined distance have a positional relationship of "close state".

The first main body component 101a and the second main body component 101b are connected by a biasing member 181. The biasing member 181 biases the first main body component 101a and the second main body component 101b to reciprocate the first main body component 101a and the second main body component 101b relative to each other.

The urging member 181 is formed of a member having spring elasticity. A coil spring may be used as a specific example of the biasing member 181. When a coil spring is used as the biasing member 181, one end of the coil spring is fixed to the first main body component 101a and the other end is fixed to the second main body component 101b, and therefore, the coil spring can bias the first main body component 101a and the second main body component 101 b. Preferably, the biasing member 181 biases the first main body component 101a and the second main body component 101b in a direction away from each other. Therefore, when the first main body component 101a and the second main body component 101b move in the direction of approaching each other, the collision between the outer contours of the first main body component 101a and the second main body component 101b can be suppressed.

When the biasing direction of the biasing member 181 on the first and second main body components 101a and 101b coincides with the direction of the impact axis, vibration generated by driving the impact component 140 can be effectively suppressed. That is, according to this configuration, since the urging member 181 is easily subjected to vibration in the impact axis direction generated by driving the impact component 140, relative movement between the first main component 101a and the second main component 101b can be more effectively promoted. The urging direction of the urging member 181 coincides with the impact axis, and a typical example is that the center impact axis 140a and the urging member 181 are provided on the same axis. Further, as shown in fig. 1, even if the urging member 181 is not provided coaxially with the central impact axis 140a, a predetermined effect can be obtained if a part of the urging member 181 is provided on the impact shaft.

The urging member 181 may be disposed such that the long axis of the urging member 181 is parallel to the impact axis, such that the long axis of the urging member 181 intersects the impact axis, or such that the urging member 181 is bent to overlap the impact axis.

The long-distance moving area 200 and the short-distance moving area 210 may adopt, for example, the following structures: the biasing members 181 are provided in the first region 100a and the second region 100b, respectively, and the biasing member 181 of the first region 100a is set to have a weaker biasing force than the biasing member 181 of the second region 100 b.

The long-distance movement area 200 and the short-distance movement area 210 may be configured such that the first main body component 101a and the second main body component 101b rotate relative to each other about the rotation axis 182. In this case, the distance between the rotational axis 182 and the first region 100a is longer than the distance between the rotational axis 182 and the second region 100 b. The rotation shaft axis 182 may be located closer to the center of gravity position 100c of the impact tool 100 than the impact shaft, and the center of gravity position 100c may be the center of gravity position of the impact tool 100 in a state where the battery 161 is attached to the battery attachment portion 160. The state in which the pivot axis 182 is closer to the center of gravity position 100c than the impact shaft indicates, for example, that when a virtual line passing through the center of gravity position 100c and perpendicularly intersecting the impact shaft and an intersection point of the virtual line and the impact shaft are set, the distance from the pivot axis 182 to the center of gravity position 100c is shorter than the distance from the pivot axis 182 to the intersection point.

The vibration isolation mechanism 180 includes a restriction portion 190, and the restriction portion 190 restricts movement of the first and second main body components 101a and 101b in the direction away from each other and movement in the direction toward each other. The restriction section 190 restricts the movement in the separating direction, thereby preventing the first main body component 101a and the second main body component 101b from being separated from each other. Further, by restricting the movement in the approaching direction by the restricting portion 190, the rear end edge 101aa of the first body component 101a can be prevented from colliding with the step portion 101bc of the second body component 101 b. That is, the restriction section 190 can prevent the main body 101 from being damaged due to the collision between the first main body component 101a and the second main body component 101 b. In this sense, it can be said that the restriction section 190 constitutes a collision prevention mechanism that prevents collision between the first exposed region 101a2 and the second exposed region 101b 2.

The restricting portion 190 is preferably provided further upward than the impact shaft. With this structure, it is easy to set the moving distance of the first main body component 101a and the second main body component 101b in the mutually distant direction on the long-distance moving area 200.

According to the above configuration, the first main body component 101a and the second main body component 101b are relatively reciprocated by vibration generated by driving the impact component 140, and transmission of vibration to the hand of the user can be suppressed. The first and second main components 101a and 101b are reciprocated relatively, that is, a combination including the impact component 140 and the driving motor 110 and a combination including the grip portion 109 and the battery mounting portion 160 are reciprocated relatively.

Further, in order to cool the drive motor 110, a motor intake port 303 and a motor exhaust port 304 may be provided on the drive motor 110. At this time, the body 101 is provided with a body inlet 301 and a body outlet 302. The body intake port 301 is provided on an area of the second cover area 101b1 that is closer to the motor intake port 303 than the motor exhaust port 304. In addition, the body exhaust port 302 is provided on an area of the second cover area 101b1 that is closer to the motor exhaust port 304 than the motor intake port 303.

In the impact tool 100 according to the present invention, the first main component 101a and the second main component 101b constitute the long-distance movement region 200 and the short-distance movement region 210 and move relative to each other. Therefore, a rotation allowing space 320 for allowing the drive motor 110 to move relatively within the second main body component 101b is formed particularly in the peripheral region of the drive motor 110. Depending on the structure of the rotation allowable space 320, there may be a case where the air discharged from the motor exhaust port 304 is returned to the motor intake port 303 (air circulation) without being discharged from the main body exhaust port 302. In the case where such an air circulation phenomenon occurs, it is difficult to effectively cool the driving motor 110. In the present invention, in order to prevent such a situation from occurring, an air circulation suppressing mechanism 300 may be provided between the motor intake port 303 and the motor exhaust port 304.

As a specific example of the air circulation suppressing mechanism 300, a wall-like member 310 extending in a predetermined direction may be provided inside the main body 101. The wall-like member 310 may be provided on either the first main component 101a or the second main component 101 b. Fig. 1 shows an example in which a projection is provided on a part of the motor holding portion 110a (the first main structural element 101a) to constitute the wall-like member 310. A predetermined gap is formed between the distal end of the wall-like member 310 and the inner region of the second main body component 101b as a rotation-allowable space 320. Therefore, the tip end of the wall-like member 310 can be prevented from colliding with the inner wall of the second exposed region 101b2 by the relative movement of the first main component 101a and the second main component 101 b. In this sense, it can be said that the gap between the wall-like member 310 and the second main structural element 101b can be referred to as a collision avoidance gap. In the case where the wall-like member 310 is provided in the second main structural element, a collision avoidance gap is formed between the distal end portion of the wall-like member 310 and the first covering region 101a1 (the motor holding portion 110 a).

According to this structure, even if the air discharged from the motor air outlet 304 flows toward the motor air inlet 303, the flow of the air is blocked by the wall-like member 310. Therefore, the air discharged from the motor exhaust port 304 is discharged to the outside of the main body 101 from the main body exhaust port 302. That is, the circulation of air from the motor air outlet 304 to the motor air inlet 303 can be suppressed by the wall-like member 310.

Although only one wall-like member 310 is shown in fig. 1, a plurality of wall-like members 310 may be provided.

(second embodiment according to the present invention)

Hereinafter, a second embodiment of the present invention will be described with reference to fig. 2 to 8. The second embodiment has a structure in which the first main body component 101a and the second main body component 101b rotate relative to each other, as compared with the first embodiment.

A second embodiment of the present invention will be described using a battery-type hammer drill 100 as an example of an impact tool. Fig. 2 is a cross-sectional view for explaining a mechanism relating to the impact operation and the rotation operation of the hammer drill 100. As shown in fig. 2, the hammer drill 100 is a portable impact tool having a grip 109 to be grasped by a user, and is configured to drive a hammer bit 119 in the axial direction of the hammer bit 119 to perform an impact operation such as a hammering operation on a workpiece, or to rotate the hammer bit 119 about the axial direction thereof to perform a turning operation to perform a drilling operation on the workpiece. The axial direction of the hammer bit 119 driven by the hammer drill 100 is the axial direction of the hammer drill 100. This axial direction coincides with the axial direction of the hammer bit 119 when the hammer bit 119 is attached to the hammer drill 100. A trigger 109a operated by a user is provided on the front side of the grip portion 109. The hammer drill 100 is an example of an "impact tool" according to the present invention, the hammer bit 119 is an example of a "tip tool" according to the present invention, and the grip 109 is an example of a "grip" according to the present invention.

(Structure of body section)

As shown in fig. 2, the hammer drill 100 is mainly formed of a main body 101 forming an outer contour of the hammer drill 100 as a whole. The hammer bit 119 is detachably attached to the distal end region of the main body 101 by a cylindrical jig 159. The hammer 119 is inserted into and held by a hammer insertion hole 159a of the jig 159, can relatively reciprocate in the longitudinal direction, and is restricted from relative rotation in the circumferential direction. The jig 159 is an example of the "tip tool mounting portion" according to the present invention.

As shown in fig. 2, the main body 101 is composed of a first main body component 101a and a second main body component 101 b. The first main component 101a is an example of the "first main component" according to the present invention, and the second main component 101b is an example of the "second main component" according to the present invention.

The first main structural element 101a is mainly composed of: a motor housing 103 for housing the electric motor 110, a motion conversion mechanism 120, a transmission housing 105 for housing the impact component 140 and the rotational power transmission mechanism 150, and an inner housing 104 fixed to both the motor housing 103 and the transmission housing 105. The electric motor 110 is housed in a motor case 110a and fixed to the motor housing 103. The motor outer case 103 and the inner case 104 are fixed together by fixing members 104b such as screws. Therefore, the electric motor 110 is integrated with the first main structural element 101 a. The motor case 110a is composed of an upper member and a lower member. The electric motor 110 is surrounded by the upper member and the lower member, and the upper member and the lower member are fixed by a fixing member 110b such as a screw. The electric motor 110 is an example of the "drive motor" according to the present invention, and the motor case 110a is an example of the "motor holding unit" according to the present invention. Further, the jig 159 is attached to the first main component 101 a.

The second main component 101b is mainly composed of a handle 109 and a battery mounting portion 160, and a battery 161 for supplying current to the electric motor 110 is mounted on the battery mounting portion 160. The battery mounting portion 160 is provided with a groove portion extending in the longitudinal direction and a terminal electrically connected to a terminal of the battery 161. The battery 161 is provided with a guide rail for fitting into the groove portion of the battery mounting portion 160, and a battery-side terminal connected to a terminal of the battery mounting portion 160. The battery 161 is an example of the "battery" according to the present invention, and the battery mounting portion 160 is an example of the "battery mounting portion" according to the present invention.

In the second embodiment, similarly to the first embodiment described with reference to fig. 1, the tip side of the jig 159 is defined as the front side and the side of the handle portion 109 facing the front side is defined as the rear side in the longitudinal direction. In the direction intersecting the longitudinal direction, the side where the jig 159 is provided is the upper side, and the side where the battery mounting portion 160 is provided is the lower side. When the directions are defined in fig. 2, 3, and 7, the right, left, upper, and lower sides in fig. 2, 3, and 7 correspond to the front, rear, upper, and lower sides of the hammer drill 100, respectively. Fig. 4 is a cross-sectional view taken along line I-I in fig. 3, and the left and right sides in fig. 4 correspond to the left and right sides of the hammer drill 100, respectively. In this sense, fig. 2, 3, and 7 show right side cross-sectional views of the hammer drill 100.

As shown in fig. 2, the first main structural element 101a is provided with a transmission housing 105 at the front, an inner housing 104 at the rear, and a motor housing 103 at the lower, respectively, around the longitudinal direction of the hammer bit 119. According to such a structure, the electric motor 110 is disposed in the first covering area 101a 1. The output shaft axis 111a of the transmission shaft 111 of the electric motor 110 intersects the longitudinal direction of the hammer drill 100. The first exposed region 101a2 is an example of the "exposed region" according to the present invention, the first covered region 101a1 is an example of the "first covered region" according to the present invention, and the output shaft axis 111a is an example of the "output shaft axis" according to the present invention.

The second main component 101b has a handle portion 109 provided at the rear. Further, a tip opening region 101ba is formed on the front side of the second main body component 101b, and a stepped portion 101bc is formed on the boundary between the tip opening region 101ba and the main body region 101 bb. The front region of the tip opening region 101ba serves as a second covered region 101b 1. The second coverage area 101b1 is an example of the "second coverage area" according to the present invention. The handle portion 109 is provided at the main body region 101bb at the second exposed region 101b 2.

The second main component 101b is divided into two parts in the longitudinal direction of the hammer bit 119 into left and right parts, and is joined to each other by a fixing member 101c such as a screw.

(construction for impact work and rotation work)

As shown in fig. 2, the rotational output of the electric motor 110 is converted into a linear motion by the motion conversion mechanism 120 and transmitted to the impact component 140, and an impact force in the axial direction (the left-right direction in fig. 1) of the hammer bit 119 is generated by the impact component 140. The impact structural element 140 is an example of the "impact structural element" according to the present invention. The rotational output of the electric motor 110 is reduced in speed by the rotational power transmission mechanism 150 and transmitted to the hammer bit 119, so that the hammer bit 119 is rotated in the circumferential direction. By pulling a trigger 109a provided on the grip portion 109, the switch is operated to energize and drive the electric motor 110.

As shown in fig. 2, the motion conversion mechanism 120 is provided above the transmission shaft 111 of the electric motor 110, and is a motion conversion mechanism that converts the rotational output of the transmission shaft 111 into linear motion of the hammer drill 100 in the forward and rearward directions. The motion conversion mechanism 120 is mainly composed of an intermediate shaft 121 rotationally driven by a bevel gear 122 meshed with a pinion gear 111b of the transmission shaft 111, a rolling body 123 attached to the intermediate shaft 121, a swinging member 125 swinging in the forward and backward directions of the hammer drill 100 in accordance with the rotation of the intermediate shaft 121 (the rolling body 123), a cylindrical piston 127 as a driving member reciprocating in the forward and backward directions of the hammer drill 100 in accordance with the swinging motion of the swinging member 125, and a cylinder 129 housing the piston 127. The cylinder 129 is provided behind the jig 159, and is integrated with the jig 159. Further, the swinging member 125 is attached to the rotating body 123 through a bearing 125 a.

As shown in fig. 2, the impact component 140 is provided above the motion conversion mechanism 120 and behind the jig 159, the rotation of the electric motor 110 is converted into the linear motion of the hammer drill 100 in the front-rear direction by the motion conversion mechanism 120, and the impact component 140 transmits the linear motion as an impact force to the hammer bit 119. The impact component 140 is mainly composed of a hammer 143 as an impact member slidably provided in the cylindrical piston 127, and a striker 145 as an intermediate member provided in front of the hammer 143 to collide with the hammer 143. The space of the piston 127 behind the ram 143 forms an air chamber 127a, and the sliding operation of the piston 127 causes the air pressure of the air to fluctuate due to the air chamber 127a, and the fluctuation in the air pressure is transmitted to the ram 143.

As shown in fig. 2, the rotary power transmission mechanism 150 is provided on the front side of the motion conversion mechanism 120, and transmits the rotary output of the electric motor 110 transmitted from the intermediate shaft 121 of the motion conversion mechanism 120 to the jig 159. The rotary power transmission mechanism 150 is mainly composed of a first gear 151 that rotates together with the intermediate shaft 121, and a gear reduction mechanism composed of a plurality of gears such as a second gear 153 that is engaged with the first gear 151 and is attached to the jig 159 (cylinder 129).

Fig. 3 is a sectional view illustrating a vibration preventing mechanism 180 to be described later, and fig. 4 is a sectional view taken along line I-I in fig. 3. Specifically, fig. 4 is a schematic view of the grip portion 109 viewed in cross section along the line I-I shown in fig. 3. In order to facilitate the clarity of the relationship between the respective members in fig. 4, a cross section of the piston 127 is described.

As shown in fig. 4, the first main component 101a is provided with a switching mechanism 170 for switching the drive mode of the hammer drill 100. The switching mechanism 170 has an operation panel 171 operated by a user, and by the switching operation of the operation panel 171, the following three drive modes can be appropriately selected: a hammer mode in which the hammer bit 119 performs an impact operation, a drill mode in which the hammer bit 119 performs a rotation operation, and a hammer drill mode in which the hammer bit 119 performs both an impact operation and a rotation operation. Here, the configuration of the switching mechanism 170 and the operations of the motion conversion mechanism 120 and the rotary power transmission mechanism 150 that occur as the switching mechanism 170 is switched are not described.

(constitution of vibration-proof mechanism)

The vibration isolation mechanism 180 will be described with reference to fig. 3 and 5 to 8. As shown in fig. 3, the vibration isolation mechanism 180 includes: a biasing member 181 that biases the first main body component 101a and the second main body component 101b in a direction in which they are separated from each other; a rotation axis 182 which is a center of relative rotation of the first main body component 101a and the second main body component 101 b; and a restricting portion 190 that restricts movement of the first main component 101a and the second main component 101b in a direction away from each other and in a direction toward each other. The vibration-proof mechanism 180 is an example of the "vibration-proof mechanism" according to the present invention, the biasing member 181 is an example of the "biasing member" according to the present invention, the rotating shaft axis 182 is an example of the "rotating shaft axis" according to the present invention, and the restricting portion 190 is an example of the "restricting portion" according to the present invention.

As shown in fig. 3, the urging member 181 is constituted by a coil spring. The biasing member 181 has one end fixed to the first main body component 101a and the other end fixed to the second main body component 101 b. Specifically, one end of the biasing member 181 is fixed to a biasing member supporting portion 104a provided in a region of the inner case 104 located behind the transmission housing 105, and the other end of the biasing member 181 is fixed to a supporting plate 101b3 attached to the second main component 101 b. At this time, the center axis of the urging member 181 is located on the same axis as the central impact axis 140 a.

As shown in fig. 3, the pivot axis 182 is disposed closer to the center of gravity 100c of the hammer drill 100 than the center impact axis 140 a. The center of gravity position 100c is the center of gravity position of the hammer drill 100 in a state where the battery 161 is attached to the battery attachment portion 160. The center of gravity position 100c is an example of "center of gravity position" according to the present invention.

The detailed structure of the rotating shaft axis 182 is explained based on fig. 5. Fig. 5 is a sectional view taken along line II-II in fig. 3. As shown in fig. 5, the rotary shaft axis 182 extends in the left-right direction, which is a direction perpendicular to the longitudinal direction of the hammer drill 100. The rotation shaft axis 182 includes a first shaft support part 182a having a concave portion and protruding outside the motor case 110a, a second shaft support part 182b having a concave portion and protruding inside the second main component 101b, and a shaft member 182c fitted into both the concave portion of the first shaft support part 182a and the concave portion of the second shaft support part 182 b. That is, the rotation axis 182 is a straight line passing through the axial direction of the shaft member 182 c. Further, the tip of the protruding portion of the first shaft support portion 182a abuts against the tip of the protruding portion of the second shaft support portion 182 b. Since the first shaft supporting portion 182a is provided on the motor case 110a, it can also be said that the shaft member 182c is formed on the motor case 110 a. The shaft member 182c is an example of a "shaft member" according to the present invention.

The restricting portion 190 shown in fig. 3 restricts movement of the first main component 101a and the second main component 101b in the direction of approaching each other and movement in the direction of separating from each other. The restriction portion 190 is formed closer to the upper side than the central impact axis 140 a. That is, the restricting portion 190 is provided at a position away from the rotational shaft axis 182. With this configuration, the length of the restricting section 190 in the longitudinal direction can be increased. Therefore, the relative movement distance between the first main component 101a and the second main component 101b can be ensured without further increasing the structural accuracy of the regulating unit 190 itself.

A specific configuration of the restricting section 190 will be described with reference to fig. 6. Fig. 6 is a sectional view taken along the line III-III in fig. 3. The regulating portion 190 is formed in a predetermined region where the first main component 101a and the second main component 101b overlap each other. The predetermined region in which the regulating portion 190 is formed is a first regulating region 191 on the first main body component 101a side and a second regulating region 192 on the second main body component 101b side. In the second embodiment, the first limiting region 191 is formed outside the first covering region 101a1, and the second limiting region 192 is formed inside the second exposing region 101b 2.

As shown in fig. 6, the first limiting region 191 is formed in a portion of the first main body component 101a extending into the second main body component 101b along the longitudinal direction (the first covering region 101a1), and includes a front side wall portion 191a, a rear side wall portion 191c, and an extending portion 191b provided between the front side wall portion 191a and the rear side wall portion 191c and extending in the longitudinal direction. The front side wall portion 191a, the extending portion 191b, and the rear side wall portion 191c are formed toward the outer side of the hammer drill 100.

The second limiting region 192 is formed in the second exposed region 101b2 covering the first limiting region 191, and includes a front rib 192a, a rear rib 192c, and an intermediate rib 192b formed between the front rib 192a and the rear rib 192 c. The front rib 192a, the intermediate rib 192b, and the rear rib 192c are formed to face in the inner direction of the hammer drill 100.

The distal ends of the front rib 192a and the rear rib 192c abut against the extending portion 191 b. With this configuration, as will be described later, the front rib 192a, the rear rib 192c, and the extending portion 191b constitute a slide guide portion 193 for guiding the relative movement of the first body component 101a and the second body component 101 b. The slide guide 193 is an example of the "guide" according to the present invention. Further, the intermediate reinforcing bead 192b has a function of securing the strength of the second limitation section 192. That is, the second limiting region 192 can be said to have a structural element for maintaining strength.

(action with respect to hammer drill)

Next, the operation of the hammer drill 100 according to the second embodiment will be described with reference to fig. 3 and 6 to 8. Fig. 3 and 6 show a state in which the first main body component 101a and the second main body component 101b are biased by the biasing member 181 and rotated in directions away from each other about the rotation shaft axis 182. Fig. 7 shows a state in which the first main body component 101a and the second main body component 101b are rotated in directions approaching each other about the rotational axis 182 against the force applied by the biasing member 181. Further, fig. 8 is a sectional view taken along line IV-IV shown in fig. 7.

In the hammer mode or the hammer drill mode, vibration is generated as the impact component 140 is driven, and the vibration isolation mechanism 180 rotates the first main body component 101a and the second main body component 101b relative to each other about the rotation axis 182 in the state shown in fig. 3 and 7.

The hammer drill 100 has a first region 100a close to the impact component 140 and a second region 100b farther from the impact component 140 than the first region 100 a. The first region 100a is an example of "first region" according to the present invention, and the second region 100b is an example of "second region" according to the present invention. When the first and second body components 101a and 101b are relatively rotated about the rotation axis 182, the first region 100a is longer than the second region 100b with respect to the distance the first and second body components 101a and 101b move in the longitudinal direction. That is, the first area 100a constitutes the long-distance movement area 200, and the second area 100b constitutes the short-distance movement area 210. The long-distance mobile area 200 is an example of the "long-distance mobile area" according to the present invention.

In the hammer drill 100, a first region 100a close to the impact component 140 is a long distance travel region 200. Therefore, the vibration generated by the driving of the impact component 140 can be more effectively suppressed. In particular, since the center axis of the biasing member 181 is coaxial with the central impact axis 140a, the biasing member 181 can receive the vibration of the impact component 140 more effectively.

When the first and second main components 101a and 101b move in the direction away from each other, the restricting mechanism 190 brings the rear rib 192c into contact with the rear wall portion 191c as shown in fig. 6. Therefore, the first main component 101a and the second main component 101b can be restricted from moving further away from each other.

When the first main body component 101a and the second main body component 101b move in the direction of approaching each other, the front rib 192a abuts against the front side wall 191a as shown in fig. 8. Therefore, the first main component 101a and the second main component 101b can be restricted from moving further in the direction of approaching each other. In particular, the rear end edge 101aa of the first main component 101a shown in fig. 2 can be prevented from coming into contact with the step portion 101bc of the second main component 101 b.

In the restricting portion 190, the extending portion 191b contacts the front rib 192a and the rear rib 192c to form a slide guide portion 193. When the first body component 101a and the second body component 101b are rotated about the rotation axis 182, the slide guide 193 can prevent the first body component 101a and the second body component 101b from moving relative to each other in the left-right direction intersecting the longitudinal direction.

That is, the restriction portion 190 can restrict the movement distance of the first and second main body components 101a and 101b in the turning direction and the movement distance in the extending direction of the turning shaft axis 182.

In the region where the front rib 192a and the rear rib 192c move with respect to the extending portion 191b, the extending portion 191b is formed smoothly so that the extending portion 191b does not obstruct the movement of the front rib 192a and the rear rib 192 c. In this sense, it can be said that the extending portion 191b has a smooth region, and the front rib 192a and the rear rib 192c can slide with respect to the smooth region. The "smooth region" means a region where there is no obstacle that prevents the front rib 192a and the rear rib 192c from sliding, and in this sense, the smooth region can be said to be a region where no obstacle is formed.

Based on the above operation, the hammer drill 100 can effectively suppress vibration generated by driving the impact component 140.

(third embodiment according to the present invention)

A third embodiment according to the present invention will be described below with reference to fig. 9 to 11.

The hammer drill 100 according to the third embodiment includes an air circulation suppressing mechanism 300, as compared with the hammer drill 100 according to the second embodiment. This air circulation suppressing mechanism 300 is an example of "air circulation suppressing mechanism" according to the present invention.

As shown in fig. 9, the second main component 101b of the hammer drill 100 according to the third embodiment includes a main body air inlet 301 for sucking outside air and a main body air outlet 302 for discharging air inside the main body 101. Inside the main body 101, the drive motor 110 is provided in the first covered region 101a1 between the main body intake port 301 and the main body exhaust port 302. Accordingly, the air sucked from the body air inlet 301 passes through the driving motor 110 when being discharged to the body air outlet 302, so that the driving motor 110 can be cooled.

As shown in fig. 10, a motor inlet 303 is provided on the upper surface of the drive motor 110. A motor case inlet 306 is provided on a region of the motor case 110a corresponding to the motor inlet 303. Further, a fan 305 driven to rotate by the transmission shaft 111 is provided inside the drive motor 110, while the transmission shaft 111 is attached. A motor outlet 304 is provided in an outer contour region of the drive motor 110 corresponding to the fan 305, and a motor case outlet 307 is provided in a region of the motor case 110a corresponding to the motor outlet 304. The motor intake port 303 is an example of an "intake port" according to the present invention, and the motor exhaust port 304 is an example of an "exhaust port" according to the present invention.

Therefore, the air sucked from the main body air inlet 301 is sucked into the drive motor 110 through the motor case air inlet 306 and the motor air inlet 303 by the rotation of the fan 305. Then, the air in the drive motor 110 is discharged to the body discharge port 302 through the motor discharge port 304 and the motor case discharge port 307 by the rotation of the fan 305. In this way, since air is passed through the drive motor 110, the cooling effect on the drive motor 110 can be effectively improved.

As shown in fig. 11, the hammer drill 100 according to the third embodiment is further provided with a wall member 310 serving as an air circulation suppressing mechanism 300. The wall-like member 310 is an example of the "wall-like member" according to the present invention. The wall-like member 310 is formed of ribs projecting inward from the inner wall of the second exposed region 101b2 covering the drive motor 110. The wall-like member 310 surrounds the drive motor 110, and a predetermined gap, which is a collision avoidance gap as described with reference to fig. 1, is formed between the tip (inner circumferential edge) of the wall-like member 310 and the drive motor 110. Because of the provision of the gap, the wall-like member 310 does not collide with the drive motor 110 even when the first main component 101a and the second main component 101b are relatively moved.

As shown in fig. 11, the wall-like member 310 is constituted by a first wall-like member 311 and a second wall-like member 312. The extended surface 311a of the first wall-like member 311 is positioned above the motor intake port 303 (motor case intake port 306) when the first main body component 101a and the second main body component 101b are in the spaced-apart state. In addition, the rotation shaft axis 182 is located on the extended surface 312a of the second wall-like member 312. Here, an extended surface of the wall-like member 310 will be described. The wall-like member 310 has surfaces facing each other, and an intermediate portion between the surfaces. The extension plane of the wall-like member 310 is defined as a plane that is parallel to the extension direction of the wall-like member 310 and passes through either one of both surfaces or a middle portion of the wall-like member 310, assuming that the wall-like member 310 is extended.

When the first and second main components 101a and 101b are not in the rotated state, the output shaft axis 111a of the drive motor 110 perpendicularly intersects the extension surface 312a of the second wall-like member 312. That is, the extended surface 312a of the second wall-like member 312 is located on the rotation shaft axis 182 and perpendicularly intersects the output shaft axis 111a of the drive motor 110.

As another configuration, the following may be adopted: when the first and second main components 101a and 101b are in a rotating state, the output shaft axis 111a of the drive motor 110 perpendicularly intersects the extension surface 312a of the second wall-like member 312 when the first and second main components 101a and 101b are closest to each other.

In the hammer drill 100 according to the third embodiment, the second wall-like member 312 is not provided in the region located on the rotation shaft axis 182. That is, in the region on the rotation axis 182, since it is not necessary to provide the rotation allowable space 320, the second main body component 101b is provided adjacent to the drive motor 110. In this sense, it can be said that the respective regions of the second main body component 101b and the drive motor 110 located on the rotation axis 182 constitute the air circulation suppressing mechanism 300.

That is, the second wall-like member 312 is provided so as to perpendicularly intersect both the turning shaft axis 182 and the output shaft axis 111a of the drive motor 110, and to be centered on a region overlapping the turning shaft axis 182. More specifically, the second wall-like member 312 is formed of a portion that is continuously provided from a region adjacent to the rear side of one second shaft support portion 182b (see fig. 5) to a region adjacent to the rear side of the other second shaft support portion 182b, and a portion that is continuously provided from a region adjacent to the front side of the one second shaft support portion 182b to a region adjacent to the front side of the other second shaft support portion 182 b. With this configuration, two different functions of downsizing the second main component 101b covering the drive motor 110 and cooling the drive motor 110 can be achieved at the same time.

The first wall-like member 311 is configured to surround the drive motor 110. A predetermined gap (collision avoidance gap) is provided between the first wall-like member 311 and the drive motor 110.

With this configuration, in the hammer drill 100 according to the third embodiment, as in the first and second embodiments, the first body component 101a and the second body component 101b are relatively rotated about the rotation axis 182. Therefore, the transmission of vibration to the user's hand can be suppressed.

The wall-like member 310 blocks the air flow moving from the motor exhaust port 304 to the motor intake port 303, and efficiently discharges the air discharged from the motor exhaust port 304 from the main body exhaust port 302. Therefore, in the hammer drill 100 according to the third embodiment, the drive motor 110 can be cooled.

(fourth embodiment according to the present invention)

A fourth embodiment according to the present invention will be described below with reference to fig. 12 to 14.

Fig. 12 is an external view schematically showing a hammer drill 100 according to a fourth embodiment. As described above, the first body component 101a and the second body component 101b have a laminated region overlapping each other, and in this laminated region, the one covering the outside constitutes an exposed region (the first exposed region 101a2, the second exposed region 101b2), and the one covering constitutes a covered region (the first covered region 101a1, the second covered region 101b 1). In this sense, the laminated region can be said to constitute an overlapping region 400 where the exposed region and the covered region overlap. The hammer drill 100 according to the fourth embodiment differs from the hammer drill 100 according to the third embodiment in the structure of the overlap region 400. The overlap area 400 is an example of the "overlap area" according to the present invention.

Fig. 13 is a diagram illustrating the overlap area 400, and shows a part of a cross section taken along the line V-V of fig. 12. The second main structural element 101b includes a flexible member 411. The flexible member 411 is covered by the first exposed region 101a2, and thus constitutes a second covered region 101b 1. This flexible member 411 is an example of "flexible member" according to the present invention. The flexible member 411 is made of a high elastic body, and is integrally molded with the second main structural element 101 b.

More specifically, the second main structural element 101b has a flexible member providing region 410, and the flexible member providing region 410 includes a front side protruding portion 410a and a rear side protruding portion 410b located in a front side tip end region. The flexible member 411 has the following portions: a convex portion 411a provided between the front side protruding portion 410a and the rear side protruding portion 410b, a concave portion 411b provided with the front side protruding portion 410a, an extension portion 411c extending from the concave portion 411b toward the front side, and a protruding portion 411d provided at the tip of the extension portion 411c and abutting against the mechanism-side surface of the first exposed region 101a 2.

When the vibration isolation mechanism 180 reciprocates the first and second body components 101a and 101b relative to each other in accordance with the driving operation of the hammer drill 100, the protruding portion 411d of the flexible member 411 comes into sliding contact with the mechanism-side surface of the first exposed region 101a 2. That is, the mechanism-side surface of the first exposed region 101a2 constitutes the slid region 420. The slid area 420 is an example of the "slid area" according to the present invention.

The flexible member 411 and the slid area 420 constitute a dust-proof mechanism 430 by blocking a gap formed between the first exposed area 101a2 and the second covered area 101b 1. The dust-proof mechanism 430 can prevent dust generated during the machining operation of the hammer drill 100 from entering between the first exposed region 101a2 and the second covered region 101b 1. Therefore, in the hammer drill 100 according to the fourth embodiment, the occurrence of a failure due to dust entering the body 101 can be reduced, and the service life of the hammer drill 100 can be extended.

Further, since the flexible member 411 is provided, the first main body component 101a and the second main body component 101b can be easily assembled.

As shown in fig. 14, the second main body component 101b is divided into two parts, a right second main body component 101bd and a left second main body component 101 be. The first body component 101a has a cylindrical portion 101ac, and the cylindrical portion 101ac has an opening 101 ab. The cylindrical portion 101ac is provided with an impact component 140, a rotational power transmission mechanism 150, and the like.

When the first main body component 101a and the second main body component 101b having this structure are assembled, as shown in fig. 14, first, the first main body component 101a and the left second main body component 101be to which the respective mechanisms are attached are assembled. At this time, the flexible member 411 of the left second main body component 101be is inserted into the cylindrical portion 101ac through the opening 101ab of the first main body component 101 a. Thereby, the flexible member 411 of the left second main body structural element 101be constitutes the second covered area 101b 1. In this sense, it can be said that the flexible member 411 constitutes the insertion region 101bf at the time of assembly. After the first main body component 101a and the left second main body component 101be are assembled, a predetermined mechanism is further provided for the first main body component 101a and the left second main body component 101 be.

Then, the first main body component 101a and the left second main body component 101be are assembled with the right second main body component 101 bd. First, the flexible member 411 (the insertion region 101bf) of the right second body component 101bd is inserted into the cylindrical portion 101ac through the opening 101ab of the first body component 101 a. At this time, the flexible member 411 can be deformed by coming into contact with an opening edge portion (rear end edge 101aa) of the opening 101 ab. This allows the flexible member 411 to be inserted into the cylindrical portion 101 ac. In this case, the flexible member 411 can be bent and further advanced into the cylindrical portion 101ac while the distal end portion of the flexible member 411 is inserted into the cylindrical portion 101ac, and in this state, when the right-side second body component 101bd is inserted into the first body component 101a, the flexible member 411 functions as a guide, and therefore, the assembly operation can be easily performed.

As described above, the hammer drill 100 according to the fourth embodiment is added with the dust-proof function and the easy-to-assemble function by the flexible member 411 to the functions of the hammer drill 100 according to the third embodiment.

(fifth embodiment according to the present invention)

A fifth embodiment according to the present invention will be described below with reference to fig. 15.

Fig. 15 is a diagram for explaining an overlap region 400 of the hammer drill 100 according to the fifth embodiment. As shown in fig. 15, in the hammer drill 100 according to the fifth embodiment, the flexible member 411 is provided in the first main body component 101 a. That is, the first main body component 101a is provided with a flexible member installation region 410 having a front side projection 410a and a rear side projection 410 b. Further, a slid area 420 in which the protruding portion 411d of the flexible member 411 slides is provided outside (on the side opposite to the side where the mechanism is provided) the second covering area 101b1 of the second main body component 101 b.

With this configuration, the hammer drill 100 according to the fifth embodiment also has a dust-proof function and an easy-to-assemble function by the flexible member 411, as in the hammer drill 100 according to the fourth embodiment.

(sixth embodiment according to the present invention)

A sixth embodiment according to the present invention will be described below with reference to fig. 16.

Fig. 16 is an external view schematically showing a hammer drill 100 according to a sixth embodiment. The hammer drill 100 according to the sixth embodiment is obtained by further improving the flexible member 411 of the hammer drill 100 according to the fourth embodiment.

In the hammer drill 100 shown in fig. 16, a protective member 101d is provided on the second main body component 101 b. The user may place the hammer drill 100 on a table or a floor, and the second main body structural element 101b may be damaged due to the material or shape of the table or the floor. On the other hand, in the hammer drill 100 according to the sixth embodiment, the protective member 101d is formed on the outer contour of the second main body component, and therefore, it is possible to suppress the occurrence of damage when the hammer drill 100 is set in the setting place.

The protective member 101d is formed of an elastomer. In the hammer drill 100 of the sixth embodiment, the protective member 101d and the flexible member 411 are connected together to form a structure. Therefore, the second main structural element 101b, the flexible member 411, and the protective member 101d can be efficiently integrally molded.

According to this configuration, the hammer drill 100 according to the sixth embodiment also has a dust-proof function and an easy-to-assemble function by the flexible member 411, as in the hammer drill 100 according to the fourth embodiment. Further, since the protective member 101d is formed, the occurrence of damage to the second main component 101b can be suppressed. In addition, since the protective member 101d, the flexible member 411, and the second main structural element 101b can be integrally molded, an increase in production cost can be suppressed.

Further, although the hammer drill 100 according to the present embodiment has been described as an example of the hammer drill, the present invention is also applicable to an electric hammer that performs an impact operation only in the longitudinal direction of the tool bit 119, and a reciprocating saw or a wire saw that performs a cutting operation on a workpiece by reciprocating a blade saw linearly.

Further, although the protection member 101d formed of an elastic body and provided on the main body 101 has been described, the constituent element formed of an elastic body is not limited to the protection member 101d, and may be, for example, a slip prevention member formed on the grip portion 109. With the structural elements formed of such an elastomer, the structural elements can be integrally molded with the main body portion together with the flexible member 411. In this case, when the component formed of the high elastic body is connected to the flexible member 411, the integral molding can be further efficiently performed, and thus an increase in manufacturing cost can be suppressed.

In view of the purpose of the present invention, the hammer drill according to the present invention may be configured as follows. Further, the embodiments may be used alone or in combination with each other, and may be used in combination with the invention described in claims.

(mode 1)

When the first and second main components are moved to be close to each other from a state of being separated from each other, the second region has a shorter moving distance in the longitudinal direction than the first region, and the second region constitutes a short-distance moving region.

(mode 2)

In the case where the impact tool is provided with the tip tool mounting portion on the upper side and the battery mounting portion on the lower side in the direction intersecting the longitudinal direction of the impact tool, the regulating portion is provided on the impact shaft.

(mode 3)

A gap is formed between the distal end of the wall-shaped member and the inner wall of the body.

(mode 4)

The flexible member and the slid region constitute a dust-proof mechanism for suppressing dust from entering the overlapping region.

(mode 5)

When the second subject component is inserted into the first body component, the flexible member forms a guide portion.

(correspondence relationship between each component of the embodiment and each component of the present invention)

The relationships between the components of the present embodiment, the components of the present invention, and the invention-specific matters are as follows. Of course, each component in the present embodiment is merely an example of an implementation configuration related to specific matters of the present invention, and each component of the present invention is not limited thereto.

The hammer drill 100 is an example of a "impact tool" according to the present invention. The hammer bit 119 is an example of a "tip tool" according to the present invention. The handle portion 109 is an example of "handle portion" according to the present invention. The jig 159 is an example of the "tip tool mounting portion" according to the present invention. The first main component 101a is an example of "a first main component" according to the present invention. The second main component 101b is an example of the "second main component" according to the present invention. The electric motor 110 is an example of the "drive motor" according to the present invention. The motor case 110a is an example of the "motor holder" according to the present invention. The battery 161 is an example of "battery" according to the present invention. The battery mounting portion 160 is an example of the "battery mounting portion" according to the present invention. The first exposed region 101a2 is an example of the "exposed region" according to the present invention. The first coverage area 101a1 is an example of "first coverage area" according to the present invention. The output shaft axis 111a is an example of "output shaft axis" according to the present invention. The second coverage area 101b1 is an example of the "second coverage area" according to the present invention. The impact structural element 140 is an example of the "impact structural element" according to the present invention. The vibration isolation mechanism 180 is an example of the "vibration isolation mechanism" according to the present invention. The urging member 181 is an example of "urging member" according to the present invention. The rotating shaft axis 182 is an example of the "rotating shaft axis" according to the present invention. The limiter 190 is an example of the "limiter" according to the present invention. The center of gravity position 100c is an example of "center of gravity position" according to the present invention. The shaft member 182c is an example of a "shaft member" according to the present invention. The slide guide 193 is an example of the "guide" according to the present invention. The first region 100a is an example of "first region" according to the present invention. The second region 100b is an example of "second region" according to the present invention. The long-distance mobile area 200 is an example of the "long-distance mobile area" according to the present invention. The air circulation suppressing mechanism 300 is an example of "air circulation suppressing mechanism" according to the present invention. The motor intake port 303 is an example of "intake port" according to the present invention. The motor exhaust port 304 is an example of an "exhaust port" according to the present invention. The wall-like member 310 is an example of the "wall-like member" according to the present invention. The overlap area 400 is an example of the "overlap area" according to the present invention. The flexible member 411 is an example of the "flexible member" according to the present invention. The slid area 420 is an example of the "slid area" according to the present invention.

Claims (13)

1. An impact tool for performing an impact operation on a workpiece by driving a tip tool to perform a linear motion,

comprising:

a main body portion;

a tip tool mounting portion extending in a predetermined longitudinal direction;

a drive motor having an output shaft axis intersecting the longitudinal direction;

an impact structural element which is driven by an output of the drive motor and has an impact shaft parallel to the longitudinal direction;

a handle portion to be held by a user;

a battery mounting portion to which a battery for supplying current to the drive motor is mounted,

the main body portion has a first main body component, a second main body component, a biasing member that biases the first main body component and the second main body component, a first region that is close to the impact component, and a second region that is farther from the impact component than the first region,

the first main component is provided with the drive motor and the impact component,

the handle portion and the battery mounting portion are provided on the second main structural element,

and a vibration damping mechanism for suppressing vibration generated in association with driving of the impact component,

the vibration prevention mechanism is configured to: wherein the first and second main components are relatively rotated about a rotation axis extending in a direction intersecting the longitudinal direction by the urging member when vibration is generated in accordance with driving of the impact component, and wherein a distance between the rotation axis and the first region is longer than a distance between the rotation axis and the second region,

the first main structural element having a first covering region covered with the second main structural element and an exposed region not covered with the second main structural element,

the drive motor is disposed in the first coverage area,

the drive motor is disposed in the motor holding portion,

the first main structural element is integrated with the motor holding portion,

a shaft member for defining an axis of the rotating shaft is formed on the motor holding portion,

the rotation shaft axis is disposed on the drive motor.

2. Impact tool according to claim 1,

has a center of gravity position in a state where the battery is mounted on the battery mounting portion,

the rotation shaft axis is closer to the center of gravity position than the impact shaft.

3. Impact tool according to claim 1,

the second main structural element has a second covering region covered by the first main structural element.

4. Impact tool according to claim 1,

the direction of the force applied by the force applying component to the first main body structure element and the second main body structure element is coincident with the direction of the impact shaft.

5. Impact tool according to claim 1,

the control device is provided with a limiting part which limits the movement of the first main body component and the second main body component in the approaching direction, and the limiting part is arranged on the inner side of the main body part.

6. Impact tool according to claim 5,

the restricting portion also serves as a guide portion for guiding the relative movement between the first main body component and the second main body component.

7. Impact tool according to claim 1,

the drive motor has an air inlet provided at one end thereof and an air outlet provided at the other end thereof, the main body portion has an air circulation suppressing mechanism,

the air circulation suppressing mechanism is provided inside the main body, is located between the air inlet and the air outlet, and suppresses circulation of air between the air inlet and the air outlet.

8. The impact tool of claim 7,

the air circulation suppressing mechanism is constituted by a wall-like member, and the axis of the rotating shaft is located on an extended surface of the wall-like member.

9. Impact tool according to claim 3,

the first main structural element and the second main structural element have an overlapping region overlapping each other,

the overlap region includes a flexible member provided on one of the first and second main body components, and a region to be slid provided on the other of the first and second main body components, and the flexible member slides in the region to be slid when the first and second main body components reciprocate relative to each other.

10. The impact tool of claim 9,

the flexible member constitutes one of the first covering region and the second covering region.

11. Impact tool according to claim 9 or 10,

the flexible member is disposed on the second body structure element.

12. Impact tool according to claim 9 or 10,

when the first main body component and the second main body component are assembled, the flexible member is elastically deformed by the first main body component or the second main body component in which the slid area is formed.

13. Impact tool according to claim 9 or 10,

the flexible member is integrally molded with one of the first and second main structural elements in the overlapping region.

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