Electric tool

Abstract

The utility model discloses an electric tool which comprises a shell (100), a motor (200), a transmission mechanism (300) connected with the motor and a reciprocating rod (400) which is connected with the transmission mechanism and can do linear reciprocating motion are arranged in the shell, and a rotating shaft (201) of the motor and the reciprocating rod are arranged in parallel or collinear; the electric tool further comprises a balance block (500) which is connected with the transmission mechanism, and the balance block and the reciprocating rod are arranged on the two sides of the transmission mechanism respectively. In the linear reciprocating motion process of the reciprocating rod, the motion direction of the balance block is always opposite to the motion direction of the reciprocating rod.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of electric tools, especially a kind of electric tool for reciprocating motion. BACKGROUND

[0002] Reciprocating electric tool, such as reciprocating saw, curve saw, electric hammer, will inevitably face vibration problem when working. Strong vibration not only reduces the operation stability of tool, makes user difficult to accurately control tool to complete work, but also affects processing precision, causes work quality to drop. From the perspective of user experience, long time holds the electric tool of big vibration, can cause cumulative injury to arm, wrist and other parts. In addition, from the performance of tool itself, vibration can accelerate the wear of internal parts, shorten the service life of tool, increase maintenance cost.

[0003] At present, the damping mechanism for reciprocating electric tool is either limited in damping effect, or large in occupied space, complex in structure. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of electric tool, which can realize excellent damping effect with as small as possible setting space, can greatly improve the operation experience of user.

[0005] In order to realize the above-mentioned purpose, the utility model provides a kind of electric tool, which includes shell, the shell is equipped with motor, transmission mechanism connected with motor and reciprocating rod capable of linear reciprocating motion connected with transmission mechanism, wherein:

[0006] The rotation axis of motor is arranged in parallel or collinear with reciprocating rod;

[0007] The electric tool further includes balance block, which is connected with transmission mechanism, and the balance block and reciprocating rod are arranged on both sides of transmission mechanism respectively;

[0008] Wherein, in the linear reciprocating operation process of reciprocating rod, the movement direction of balance block is always opposite to the movement direction of reciprocating rod.

[0009] Further, in the electric tool described in the utility model, when the rotation axis of motor is arranged in parallel with reciprocating rod, the distance between rotation axis and reciprocating rod is less than or equal to 15mm.

[0010] Further, in the electric tool described in the utility model, the distance between the center of mass of reciprocating rod and the center of mass of balance block is less than or equal to 20mm.

[0011] Further, the electric tool has the transmission mechanism, the transmission mechanism comprises a first bevel gear and a second bevel gear which is meshed with the first bevel gear, the first bevel gear is connected with the rotating shaft of the motor, the rotating shaft of the second bevel gear is perpendicular to the rotating shaft of the first bevel gear, the reciprocating rod and the balance block are connected with the second bevel gear respectively, and the reciprocating rod and the balance block are arranged on the two sides of the tooth surface of the second bevel gear respectively.

[0012] Further, the electric tool has the transmission mechanism, the transmission mechanism comprises a first bevel gear and a second bevel gear which is meshed with the first bevel gear, the first bevel gear is connected with the rotating shaft of the motor, the rotating shaft of the second bevel gear is perpendicular to the rotating shaft of the first bevel gear, the reciprocating rod and the balance block are connected with the second bevel gear respectively, and the reciprocating rod and the balance block are arranged on the two sides of the tooth surface of the second bevel gear respectively.

[0013] Further, the electric tool has the transmission mechanism, the transmission mechanism comprises a first bevel gear and a second bevel gear which is meshed with the first bevel gear, the first bevel gear is connected with the rotating shaft of the motor, the rotating shaft of the second bevel gear is perpendicular to the rotating shaft of the first bevel gear, the reciprocating rod and the balance block are connected with the second bevel gear respectively, and the reciprocating rod and the balance block are arranged on the two sides of the tooth surface of the second bevel gear respectively.

[0014] Further, the electric tool has the transmission mechanism, the transmission mechanism comprises a first bevel gear and a second bevel gear which is meshed with the first bevel gear, the first bevel gear is connected with the rotating shaft of the motor, the rotating shaft of the second bevel gear is perpendicular to the rotating shaft of the first bevel gear, the reciprocating rod and the balance block are connected with the second bevel gear respectively, and the reciprocating rod and the balance block are arranged on the two sides of the tooth surface of the second bevel gear respectively.

[0015] Further, the electric tool has the transmission mechanism, the transmission mechanism comprises a first bevel gear and a second bevel gear which is meshed with the first bevel gear, the first bevel gear is connected with the rotating shaft of the motor, the rotating shaft of the second bevel gear is perpendicular to the rotating shaft of the first bevel gear, the reciprocating rod and the balance block are connected with the second bevel gear respectively, and the reciprocating rod and the balance block are arranged on the two sides of the tooth surface of the second bevel gear respectively.

[0016] Further, the electric tool has the transmission mechanism, the transmission mechanism comprises a first bevel gear and a second bevel gear which is meshed with the first bevel gear, the first bevel gear is connected with the rotating shaft of the motor, the rotating shaft of the second bevel gear is perpendicular to the rotating shaft of the first bevel gear, the reciprocating rod and the balance block are connected with the second bevel gear respectively, and the reciprocating rod and the balance block are arranged on the two sides of the tooth surface of the second bevel gear respectively.

[0017] Further, the electric tool has the transmission mechanism, the transmission mechanism comprises a first bevel gear and a second bevel gear which is meshed with the first bevel gear, the first bevel gear is connected with the rotating shaft of the motor, the rotating shaft of the second bevel gear is perpendicular to the rotating shaft of the first bevel gear, the reciprocating rod and the balance block are connected with the second bevel gear respectively, and the reciprocating rod and the balance block are arranged on the two sides of the tooth surface of the second bevel gear respectively.

[0018] Further, the electric tool has the transmission mechanism, the transmission mechanism comprises a first bevel gear and a second bevel gear which is meshed with the first bevel gear, the first bevel gear is connected with the rotating shaft of the motor, the rotating shaft of the second bevel gear is perpendicular to the rotating shaft of the first bevel gear, the reciprocating rod and the balance block are connected with the second bevel gear respectively, and the reciprocating rod and the balance block are arranged on the two sides of the tooth surface of the second bevel gear respectively.

[0019] Further, the electric tool has the transmission mechanism, the transmission mechanism comprises a first bevel gear and a second bevel gear which is meshed with the first bevel gear, the first bevel gear is connected with the rotating shaft of the motor, the rotating shaft of the second bevel gear is perpendicular to the rotating shaft of the first bevel gear, the reciprocating rod and the balance block are connected with the second bevel gear respectively, and the reciprocating rod and the balance block are arranged on the two sides of the tooth surface of the second bevel gear respectively.

[0020] The electric tool is compact and light, the number of components is reduced as much as possible, the weight of the whole machine is reduced, the production cost is reduced, the electric tool can effectively reduce vibration during the whole use process, and the use comfort is greatly improved. Attached Figure Description

[0021] Figure 1 The diagram schematically illustrates the structure of the power tool according to one embodiment of the present invention.

[0022] Figure 2 This illustration shows the connection state of the motor and transmission mechanism of the power tool described in this utility model under one embodiment.

[0023] Figure 3 A cross-sectional view shows the connection state of the motor and transmission mechanism of the power tool according to one embodiment of the present invention.

[0024] Figure 4 The cross-sectional view shows the motor and transmission mechanism of the power tool according to one embodiment of the present invention, and the connection state of the transmission mechanism with the reciprocating rod and the balance block.

[0025] Figure 5 This shows the connection state between one side of the second bevel gear and the reciprocating rod in one embodiment of the power tool described in this utility model.

[0026] Figure 6 This invention illustrates the connection structure between the reciprocating rod and the second bevel gear in one embodiment of the power tool described herein.

[0027] Figure 7 This shows the connection state between the other side of the second bevel gear and the balance block in one embodiment of the power tool described in this utility model.

[0028] Figure 8 This illustration shows the state in which the second bevel gear of the power tool described in this invention is disposed within the housing in one embodiment.

[0029] Figure 9 The sectional view shows the state in which the second bevel gear of the power tool of the present invention is disposed within the housing in one embodiment. Detailed Implementation

[0030] The electric tools described in this utility model will be further explained and described below with reference to the accompanying drawings and specific embodiments. However, such explanation and description do not constitute an undue limitation on the technical solution of this utility model.

[0031] Reciprocating power tools, such as reciprocating saws, hammer drills, and jigsaws, inevitably face vibration issues during operation. Strong vibrations not only reduce the tool's operational stability, affecting the user experience and operational accuracy, but also shorten its lifespan and increase maintenance costs.

[0032] Therefore, it is necessary to set a damping mechanism in the electric tool, however, the damping mechanism for the reciprocating electric tool currently has limited damping effect or occupies large space and has complex structure.

[0033] In order to solve this problem, the utility model provides a brand-new electric tool in one embodiment, which can achieve excellent damping effect and has the advantages of compact structure.

[0034] Figure 1 The structure of the electric tool according to the utility model is schematically shown in one embodiment.

[0035] As Figure 1 shown, the electric tool comprises a housing 100, a motor 200 arranged in the housing 100, a transmission mechanism 300 connected with the motor, and a reciprocating rod 400 capable of linear reciprocating motion connected with the transmission mechanism 300.

[0036] When the electric tool is working, an operator holds the housing, starts the motor 200, and the rotating shaft 201 of the motor 200 is decelerated by the transmission mechanism 300 to drive the reciprocating rod 400 to make linear reciprocating motion along the axial direction L, thereby driving the tool chuck connected to the end of the reciprocating rod to process the workpiece.

[0037] In some more specific embodiments, the electric tool can be a reciprocating saw, for example, and the reciprocating rod 400 can drive the saw blade to cut the workpiece. In some other more specific embodiments, the electric tool can also be a jigsaw or other equipment tool with a reciprocating rod (or output shaft) performing linear reciprocating motion.

[0038] In some more specific embodiments, the housing 100 can be a light material, for example, a plastic housing, with a gear box of metal material arranged therein. The motor 200 can be fixedly arranged in the gear box. The rotation of the motor generates torque to drive the gear of the transmission mechanism in the gear box to rotate. The type of the motor is not limited in the utility model, and the types of the motor, AC, DC, and BLDC, can be applicable to the utility model.

[0039] As Figure 1 shown, in some embodiments, the rotating shaft 201 of the motor 200 is arranged in parallel with or in line with the reciprocating rod 400.

[0040] In the utility model, parallel setting of the rotating shaft 201 of the motor 200 and the reciprocating rod 400 means that the geometric center axis (or the center of mass motion track) of the rotating shaft 201 of the motor 200 and the geometric center axis (or the center of mass motion track) of the reciprocating rod 400 are parallel to each other and have a spacing between them. Collinear setting of the rotating shaft 201 of the motor 200 and the reciprocating rod 400 means that the geometric center axis (or the center of mass motion track) of the rotating shaft 201 of the motor 200 and the geometric center axis (or the center of mass motion track) of the reciprocating rod 400 are coincident. These two setting modes have significantly different layouts and setting modes relative to the setting mode in which the rotating shaft 201 of the motor 200 and the reciprocating rod 400 are perpendicular to each other. The rotating shaft 201 of the motor 200 and the reciprocating rod 400 being perpendicular to each other will cause the center of gravity of the tool to move forward, and when the tool is side-cutting, it will be unstable to hold and will swing. The utility model can effectively solve this problem, and the rotating shaft axis of the motor and the reciprocating rod axis are parallel or collinear, so that the inertial force and the center of mass of the tool are very close, thereby greatly reducing the vibration. And the structure occupies a small space.

[0041] Moreover, parallel or collinear setting of the rotating shaft 201 of the motor 200 and the reciprocating rod 400 can also make the user operate more easily, because the axis line passes through the holding position Q of the operator when using the electric tool, so that the reaction force generated by the tool during operation can pass through the holding position and be offset by the supporting force, and no additional overturning torque is generated.

[0042] As shown in Figure 1 , the electric tool further comprises a balance block 500 connected with the transmission mechanism 300, and the balance block 500 and the reciprocating rod 400 are arranged on the two sides of the transmission mechanism 300 respectively, for example, as shown in Figure 1 the height direction, on the upper side and the lower side of the transmission mechanism 300 respectively. Among them, in the process of the reciprocating rod 400 doing linear reciprocating motion along the axial direction L, the balance block 500 also does linear reciprocating motion, and the motion direction of the balance block 500 is always opposite to the motion direction of the reciprocating rod 400.

[0043] In some more specific embodiments, the balance block can be arranged as an integral component, and in the process of the reciprocating rod 400 doing linear reciprocating motion along the axial direction L, the motion direction of the balance block 500 is always parallel and opposite to the motion direction of the reciprocating rod 400.

[0044] In some more specific embodiments, the balancing block can also be provided as two or an even number of balancing components that are substantially symmetrically distributed, and during the linear reciprocating movement of the reciprocating rod 400 along the axial direction L, the direction of movement of the balancing block is always opposite to the direction of movement of the reciprocating rod 400 but can have a certain angle (i.e. not parallel), but the two or other even number of balancing components can offset the vertical component forces of each other, so it can also achieve the technical effect of complete balance.

[0045] The utility model discloses a reciprocating rod and balancing block that are set on both sides of the transmission mechanism and always move in opposite directions, realize the linear motion of the balancing block independent of the transmission mechanism, rather than synchronous motion with the transmission mechanism, thereby realizing the reciprocating motion of the balancing block and the reciprocating rod that is completely balanced in terms of inertial force, bringing smooth cutting effect and low vibration, and the entire device has high integration, small size and compact structure.

[0046] In some more specific embodiments, when the rotating shaft 201 of the motor 200 is arranged in parallel with the reciprocating rod 400 (i.e. there is a gap between the two), the gap between the rotating shaft and the reciprocating rod is less than or equal to 15 mm, and is as small as possible within this range.

[0047] In some more specific embodiments, the distance between the center of mass of the reciprocating rod 400 and the center of mass of the balancing block 500 is less than or equal to 20 mm. Within this range, the force arm of the moment of inertia (i.e. the distance between the center of mass of the reciprocating rod and the center of mass of the balancing block) is as short as possible, and the influence of the moment of inertia on the operation of the power tool is reduced as much as possible. Therefore, preferably, the distance between the centers of mass of the two can be made to coincide by designing the weight distribution of the two.

[0048] As shown in Figure 2 and Figure 3 In some more specific embodiments, the motor 200 includes a stator 202 fixedly arranged in the housing, and a rotating shaft 201 (or rotor) of the motor rotatably arranged. One end of the rotating shaft 201 of the motor is arranged on the housing through the rear rotor bearing 203, and the other end is arranged on the gear box 305 of metal material in the housing through the front rotor bearing 204. Since the gear box is fixedly arranged on the housing as a whole, it can be considered as a part of the housing.

[0049] As shown in Figure 2 , Figure 3 and Figure 4As shown, the transmission mechanism includes a first bevel gear 301 and a second bevel gear 302 meshing with the first bevel gear. The first bevel gear 301 is fixedly connected to the motor shaft 201, thus achieving synchronous rotation. The rotation shaft 304 of the second bevel gear 302 is perpendicular to the rotation shaft of the first bevel gear, thus changing the direction of rotation. The second bevel gear 302 is rotatably mounted in the gearbox via a second bevel gear bearing 306.

[0050] In some more specific implementations, according to Figure 2 As shown, the first bevel gear 301 rotates clockwise (right-handed) when viewed from the small end to the large end, and its tooth profile helix is ​​right-handed. This ensures that its axial force is directed outwards towards the rotor front bearing 204, thus guaranteeing smooth meshing. The second bevel gear 302 rotates counterclockwise (left-handed) when viewed from the small end to the large end, and its tooth profile helix is ​​left-handed.

[0051] like Figure 4 , Figure 5 and Figure 7 As shown, the reciprocating rod 400 and the balance block 500 are respectively connected to the second bevel gear 302, and the reciprocating rod and the balance block are respectively disposed on both sides of the tooth surface of the second bevel gear 302.

[0052] like Figure 2 and Figure 3 As shown, in some more specific embodiments, the first side of the second bevel gear 302 (i.e. the side connected to the reciprocating rod) is provided with an eccentric pin 3021.

[0053] like Figure 5 and Figure 6 As shown, the reciprocating rod 400 has a groove 401 at its tail end, and an eccentric pin 3021 is located in the groove 401 and can slide within it. Using the reciprocating rod 400 as a motion reference frame, the eccentric pin 3021 performs reciprocating linear motion within the groove of the reciprocating rod. With this arrangement, the rotation of the second bevel gear 302 around its rotation axis 304 can drive the rotation of the eccentric pin 3021, thereby causing the reciprocating rod to perform linear reciprocating motion in the axial direction L (or the length direction of the reciprocating rod).

[0054] like Figure 4 and Figure 6 As shown, in some more specific embodiments, one end of the reciprocating rod is fitted inside the positioning sleeve 700, which is fixedly disposed within the housing. Therefore, the reciprocating rod 400 is limited and guided by the positioning sleeve 700 and cannot move freely within the housing. Figure 1 and Figure 4 It swings in the forward and backward direction (i.e., the direction perpendicular to the paper), but can only perform linear reciprocating motion in the axial direction L (or the length direction of the reciprocating rod).

[0055] In order to further ensure the stability of the linear reciprocating movement of the reciprocating rod and to limit the reciprocating rod in the height direction, in some more specific embodiments, as shown in Figure 4 and Figure 6 , a limiting element 800 corresponding to the position of the other end of the reciprocating rod 400 can also be arranged in the shell, and the limiting element 800 is arranged below the reciprocating rod, so as to prevent the reciprocating rod from sagging under the action of the reaction force of the sawing force during movement. In some more specific embodiments, in order to reduce the contact friction between the limiting element and the reciprocating rod, the limiting element can be arranged as an elongated limiting rod, and a plurality of limiting rods can be arranged. Of course, in some other more specific embodiments, the limiting element can also be arranged as a whole limiting pad.

[0056] As shown in Figure 2 and Figure 3 , in some more specific embodiments, in order to further reduce the friction between the eccentric pin 3021 and the sliding groove or to improve the service life of the components, a sleeve ring 3022 can be arranged on the eccentric pin 3021, and the sleeve ring 3022 can rotate relative to the eccentric pin 3021. In some more specific embodiments, the sleeve ring 3022 can be a needle bearing. In some other more specific embodiments, the sleeve ring 3022 can also be a common shaft sleeve.

[0057] As shown in Figure 7 , in some more specific embodiments, the second bevel gear is provided with an eccentric disc 3023 on the second side opposite to the first side, and a balance block 500 is sleeved on the eccentric disc 3023 through a waist hole 501, and the eccentric disc 3023 can slide relative to the waist hole 501.

[0058] Continuing to refer to Figure 7 , the balance block 500 is provided with a guide groove 502, and a guide pin 600 fixedly arranged in the shell is correspondingly inserted into the guide groove, so as to limit and guide the movement of the balance block.

[0059] In some more specific embodiments, the guide pin and the guide groove can be provided with a plurality of guide pins and guide grooves, for example, three guide pins and guide grooves as shown in Figure 7 . In addition, the guide groove 502 can be a closed groove or an open groove.

[0060] In some embodiments, in order to further ensure the stability of the second bevel gear with the eccentric structure during movement, a center of mass adjusting structure 307 can be arranged on the second bevel gear. As shown in Figure 8As shown, in some more specific embodiments, the center of gravity adjustment structure can be configured as a slot formed in the second bevel gear. Of course, in other more specific embodiments, the center of gravity adjustment structure can also be other structures, such as additional mass counterweights.

[0061] like Figure 9 As shown, in some more specific embodiments, the second bevel gear 302 is interference-fitted with its rotating shaft 304, thereby achieving a fixed connection between the two without the need for connecting parts. The rotating shaft 304 of the second bevel gear is connected to the second bevel gear bearing 306 by fastening screws 308. The second bevel gear bearing 306 is fixedly mounted on the gearbox within the housing. For example, a metal insert 309 with toothed grooves is die-cast onto the gearbox. This fastening method allows for complete axial fastening of the second bevel gear, while eliminating the need for bearing end caps and end cap fixing screws, further simplifying the mechanism.

[0062] In some more specific embodiments, the direction of rotation of the fastening screw 308 is opposite to the direction of rotation of the second bevel gear, thereby achieving a self-locking function.

[0063] This utility model uses a steel structure that minimizes the height of the gearbox and shortens the motor axis, resulting in a compact, lightweight, and low-vibration power tool. This allows customers to operate it easily for extended periods.

[0064] Additionally, if the user presses the switch with their other hand (e.g.) Figure 1 Position Q) is advantageous if the pressing axis is close to the axis of the motor's rotation and the axis of the reciprocating rod. This is because the reaction force generated by the sawing force is close to the main support line of the user's hand (the pressing line of the index and middle fingers is also close to the main support line), making it easy for the user to operate without generating additional torque. The operating force can be directly applied to the area that the hand can resist.

[0065] It should be noted that the terms "up," "down," "left," and "right" used in this article are for ease of understanding, and are based on... Figures 1 to 9 This is an exemplary description of the setting method and orientation, and is not intended to limit the present invention.

[0066] It should be noted that the prior art within the scope of protection of this utility model is not limited to the embodiments given in this utility model document. All prior art that does not contradict the solution of this utility model, including but not limited to prior patent documents, prior publications, prior public uses, etc., can be included in the scope of protection of this utility model.

[0067] In addition, the combination manners of the technical features in the present case are not limited to the combination manners recorded in the claims of the present case or the combination manners recorded in the specific embodiments, and all the technical features recorded in the present case can be freely combined or combined in any manner, unless contradictory to each other.

[0068] It should also be noted that the above-mentioned embodiments are only specific embodiments of the present application. Obviously, the present application is not limited to the above-mentioned embodiments, and similar changes or modifications made by the skilled in the art from the content disclosed by the present application are directly derived or easily conceived, and all should belong to the protection scope of the present application.

Claims

1. An electric power tool comprising a housing (100), a motor (200) arranged in the housing, a transmission mechanism (300) connected with the motor, and a reciprocating rod (400) capable of linear reciprocating motion connected with the transmission mechanism, characterized in that: the rotation shaft (201) of the motor is arranged in parallel or collinear with the reciprocating rod; the electric power tool further comprises a counterweight (500) connected with the transmission mechanism, and the counterweight and the reciprocating rod are arranged on two sides of the transmission mechanism respectively; and the movement direction of the counterweight is always opposite to the movement direction of the reciprocating rod during the linear reciprocating operation of the reciprocating rod. When the rotation shaft of the motor is arranged in parallel with the reciprocating rod, the distance between the rotation shaft and the reciprocating rod is less than or equal to 15 mm. The distance between the center of mass of the reciprocating rod and the center of mass of the counterweight is less than or equal to 20 mm. The transmission mechanism comprises a first bevel gear (301) connected with the rotation shaft of the motor and a second bevel gear (302) meshingly connected with the first bevel gear, the rotation shaft (304) of the second bevel gear is perpendicular to the rotation shaft of the first bevel gear, and the reciprocating rod and the counterweight are respectively connected with the second bevel gear and arranged on two sides of the tooth surface of the second bevel gear.

2. The power tool of claim 1, wherein, The first side of the second bevel gear is provided with an eccentric pin (3021), the tail end of the reciprocating rod is provided with a sliding groove (401), the eccentric pin is arranged in the sliding groove and can slide in the sliding groove.

3. The power tool of claim 1, wherein, The eccentric pin is provided with a sleeve ring (3022) outside, and the sleeve ring can rotate relative to the eccentric pin.

4. The power tool of claim 1, wherein, The second side of the second bevel gear opposite to the first side is provided with an eccentric disc (3023), the counterweight is sleeved on the eccentric disc through a waist hole (501), and the eccentric disc can slide relative to the waist hole.

5. The power tool of claim 4, wherein, The second bevel gear is provided with a center of mass adjusting structure (307).

6. The power tool of claim 5, wherein, The second bevel gear is in interference fit with the rotation shaft thereof, the rotation shaft of the second bevel gear is connected with a second bevel gear bearing (306) through a fastening screw (308), and the second bevel gear bearing is fixedly arranged in the housing.

7. The power tool as described in claim 4, characterized in that, The rotation direction of the fastening screw is opposite to the rotation direction of the second bevel gear.

8. The power tool of claim 4, wherein, The counterweight is provided with a guide groove (502), and a guide pin (600) is fixedly arranged in the housing and correspondingly inserted into the guide groove.

9. The power tool of claim 4, wherein, One end of the reciprocating rod is sleeved in a positioning sleeve (700) fixedly arranged in the housing, and a limiting element (800) is arranged in the housing corresponding to the position of the other end of the reciprocating rod to limit the displacement of the reciprocating rod in the height direction.

10. The power tool of claim 9, wherein, ​ 11. The power tool of claim 1, wherein, ​ 12. The power tool of claim 1, wherein, ​

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