WO2020181768A1 - 电动螺丝批 - Google Patents
电动螺丝批 Download PDFInfo
- Publication number
- WO2020181768A1 WO2020181768A1 PCT/CN2019/112135 CN2019112135W WO2020181768A1 WO 2020181768 A1 WO2020181768 A1 WO 2020181768A1 CN 2019112135 W CN2019112135 W CN 2019112135W WO 2020181768 A1 WO2020181768 A1 WO 2020181768A1
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- WO
- WIPO (PCT)
- Prior art keywords
- housing
- electric screwdriver
- motor
- central axis
- screwdriver according
- Prior art date
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
Definitions
- This application relates to the field of electric tools, for example, to an electric screwdriver.
- the application provides an electric screwdriver, which is small in size and convenient to assemble.
- An embodiment provides an electric screwdriver, comprising: a housing extending in the direction of the central axis and forming a receiving cavity; a bit adapter shaft configured to connect the bit bit; a motor configured to drive the bit bit adapter shaft Rotation; power supply, set to provide energy to the motor; power interface, set at the end of the shell away from the batch head adapter shaft; the first fixed housing, set to fix the motor and the batch head rotation Connecting shaft, the first fixed housing is formed with a mounting hole along a linear direction parallel to the central axis; and a second fixed housing is formed with a fixing groove configured to fix the power source, the second fixed housing
- the body is formed with a fixing hole along a linear direction parallel to the central axis; wherein the inner wall of the housing is provided with first and second connecting holes distributed along the linear direction parallel to the central axis;
- An embodiment provides an electric screwdriver, comprising: a housing extending in the direction of the central axis and forming a accommodating cavity; and a driving integrated part installed in the accommodating cavity; wherein the driving integrated part includes: The connecting shaft is set to connect the batch head; the motor is set to drive the batch head adapter shaft; and the power supply is set to provide energy to the motor; wherein the drive integration part is arranged along the direction of the central axis, and A mounting hole configured to be connected to the housing is formed; a connecting portion connected to the drive integrated portion is formed on the inner wall of the housing, the connecting portion extends along the central axis direction, and the drive integrated portion is provided When the mounting hole is matched with the connecting portion, it is connected to the housing along the central axis direction.
- An embodiment provides an electric screwdriver, comprising: a housing extending in the direction of the central axis and forming a receiving cavity; a bit adapter shaft configured to connect to the bit head; a motor configured to drive the bit head adapter shaft to rotate A battery, which is arranged to provide energy to the motor; a power interface, which is arranged on the housing; and a fixed shell, which is arranged to fix the motor and the bit adapter shaft, and the fixed shell is parallel to A mounting hole is formed in the linear direction of the central axis; wherein the inner wall of the housing is provided with first connecting holes distributed along a linear direction parallel to the central axis; the fixed housing is configured to act as the first When a connecting hole is connected to the mounting hole by a screw, it is connected to the housing.
- An embodiment provides an electric screwdriver, comprising: a housing extending in the direction of the central axis and forming a receiving cavity; a bit adapter shaft configured to connect to the bit head; a motor configured to drive the bit head adapter shaft to rotate A power supply, configured to provide energy to the motor; a power interface, located at an end of the housing away from the batch head adapter shaft; a first fixed housing, configured to fix the motor and the batch head adapter Shaft, the first fixed housing is formed with a mounting hole along a linear direction parallel to the central axis; and a second fixed housing is formed with a fixing groove configured to fix the power source, the second fixed housing A fixing hole is formed along a straight line direction parallel to the central axis; wherein a connecting portion configured to connect the motor, the bit adapter shaft and the power source is formed on the inner wall of the housing; the housing It comprises two openings, the motor and the bit adapter shaft are arranged in the containing cavity through one of the openings, and the power source is arranged in the
- An embodiment provides an electric screwdriver, comprising: a housing extending in the direction of the central axis and forming a receiving cavity; a bit adapter shaft configured to connect to the bit head; a motor configured to drive the bit head adapter shaft to rotate
- the battery is configured to provide energy to the motor;
- the power interface is provided on the housing; and
- the fixed housing is formed with a fixed groove for fixing the power source, the fixed housing along a straight line direction parallel to the central axis
- a fixing hole is formed; wherein the inner wall of the housing is provided with connecting holes distributed along a linear direction parallel to the central axis; the fixing housing is configured to connect the connecting hole to the fixing hole by a screw When connected to the housing.
- Figure 1 is a perspective view of an electric screwdriver provided by an embodiment
- Figure 2 is a perspective view of the electric screwdriver in Figure 1 from another perspective;
- FIG 3 is an exploded schematic diagram of the electric screwdriver in Figure 1;
- Figure 4 is a further exploded schematic diagram of the electric screwdriver in Figure 3;
- Fig. 5 is an exploded schematic view of the electric screwdriver in Fig. 4 from another perspective;
- Figure 6 is a partial enlarged view of the electric screwdriver in Figure 5 at A;
- Figure 7 is a partial enlarged view of the electric screwdriver B in Figure 5;
- Fig. 8 is a perspective view of the housing of the electric screwdriver in Fig. 3;
- Fig. 9 is a partial enlarged view of C of the housing of the electric screwdriver in Fig. 8;
- Figure 10 is a plan view of the electric screwdriver in Figure 1 with the back cover removed;
- Figure 11 is a plan view of the housing of the electric screwdriver in Figure 10;
- Figure 12 is a cross-sectional view of the electric screwdriver in Figure 1 cut from the mounting hole;
- Fig. 13 is a cross-sectional view of the electric screwdriver in Fig. 1 cut from the fixing hole.
- the electric screwdriver 100 as shown in FIGS. 1 to 3 includes a housing 11, a control device 12, a front cover 13, a rear cover 14 and a driving integrated part 15.
- the drive integration part 15 is provided in the housing 11 and sealed in the housing 11 by the front cover 13 and the rear cover 14.
- the housing 11 is a cylinder extending along the direction of the central axis 101, and the housing 11 can be injection molded into a whole by plastic or metal. In an embodiment, the housing 11 can also be pieced together by a two-part shell, which is not limited here.
- the inside of the housing 11 is hollow to form an accommodating cavity 111, two openings are formed at both ends of the housing 11, and connecting ends for connecting the front cover 13 and the rear cover 14 are respectively provided at the two openings.
- An installation port 112 for installing the control device 12 is also formed on the outer wall of the housing 11.
- the front cover 13 and the housing 11 are connected by threads; the rear cover 14 and the housing 11 form a snap connection.
- the connection between the front cover 13 or the rear cover 14 and the housing 11 is not limited to the above-mentioned connection method, and the front cover 13 and the housing 11 may form a snap connection, and the rear cover 14 and the housing 11 may form a threaded connection, or a front Both the cover 13 and the rear cover 14 form a snap connection or a screw connection with the housing 11, as long as the connection between the front cover 13 and the rear cover 14 and the housing 11 can be realized.
- the drive integration unit 15 includes: a circuit board 151, a power supply 152, a motor 153 and a bit transfer shaft 154.
- the circuit board 151, the power supply 152, the motor 153, and the bit adapter shaft 154 may also constitute the aforementioned drive integration unit 15.
- the circuit board 151 is connected to the control device 12, and the control device 12 is configured to control the output of the electric screwdriver 100.
- the electric screwdriver 100 includes multiple working modes such as forward rotation, reverse rotation, fast rotation, and slow rotation. Each of the working modes can be controlled by the control device 12.
- the motor 153 is configured to output power to drive the bit adapter shaft 154 to rotate.
- the drive integration part 15 further includes a gear box 155, which is connected to the motor 153 and transmits power from the motor 153 to the bit adapter shaft 154.
- the front cover 13 is also formed with a through hole for the bit adapter shaft 154 to pass through.
- the first end of the bit adapter shaft 154 is connected to the gear box 155, and the second end of the bit adapter shaft 154 passes through the through hole. It can be connected to different types of bits and related accessories to adapt to different working conditions.
- the power source 152 is configured to supply power to the motor 153.
- the power supply 152 and the motor 153 are electrically connected to the circuit board 151 respectively.
- the power supply 152 In a linear direction parallel to the central axis 101, the power supply 152, the motor 153, the gear box 155 and the bit adapter shaft 154 are arranged in sequence.
- the power supply 152 can be charged in the form of USB charging, so that it can be used repeatedly, which saves energy and protects the environment.
- the back cover 14 is also provided with a power interface 141 for charging (refer to FIG. 1).
- the drive integration part 15 further includes a first fixed housing 156.
- the first fixed housing 156 can fix the motor 153 and the gear box 155 as a whole, thereby reducing or eliminating the possible displacement and vibration between the motor 153 and the gear box 155.
- the first fixed housing 156 may be an annular housing or other types of fasteners.
- the first fixed housing 156 may be a cylinder that can fix the motor 153 and the gear box 155 as a whole.
- the first fixed housing 156 includes a first housing 156a and a second housing 156c.
- the first shell 156a and the second shell 156c are both arc-shaped shells, and the two can be connected to form a complete cylinder.
- the cylinder is hollow and forms an accommodation space for the motor 153 and the gear box 155.
- the accommodating space formed by the connection of the first housing 156a and the second housing 156c can fix the motor 153 and the gear box 155, avoiding the vibration of the motor 153 during high-speed rotation and affecting the transmission between the motor 153 and the gear box 155
- the first housing 156a and the second housing 156c can also play a protective role, and can isolate at least part of the vibration from the motor 153 and the gearbox 155, and prevent the vibration from being transmitted to the outside world and affecting the user experience.
- Fixing the motor 153 and the gear box 155 by the first housing 156a and the second housing 156c can prevent the housing 11 from adding extra volume to form a receiving groove for the motor 153 and the gear box 155, and can promote the drive integration part 15 Integration reduces the volume of the drive integration part 15 and at the same time reduces the volume of the housing 11.
- the first fixed housing 156 is a fixed structure and does not occupy more space of the housing 11.
- the first fixed housing 156 fastens the motor 153 and the gear box 155, and the housing 11 It is only necessary to form an accommodating space for accommodating the first fixed housing 156, instead of forming a complicated internal rib and connecting structure for fixing the motor 153 and the gear box 155.
- the first housing 156a and the second housing 156c are respectively connected to the gear box 155 by screws, so that the first housing 156a, the second housing 156c, the motor 153 and the gear box 155 can be connected as a whole .
- the circuit board 151 is fixed and installed on the first housing 156a by the second fixed housing 157 of the drive integrated part 15.
- the circuit board 151 is also formed or connected with a connection terminal 151a configured to connect to a power source 152, and the connection terminal 151a includes two.
- the connecting terminal 151a can hold the power supply 152 on the one hand, and also form an electrical connection with the power supply 152 on the other hand, so as to realize the output and transmission of electric energy.
- the second fixed housing 157 is also configured to fix the power source 152.
- the second fixed housing 157 extends along the direction of the central axis 101 and is formed with a fixing groove 157a (refer to FIG. 7).
- the first end of the fixing groove 157a is open, and the second end of the fixing groove 157a is closed.
- the fixing groove 157a is further formed with a notch, which can facilitate the insertion of the connecting end 151a.
- the first end of the connecting end 151a is disposed in the second end of the fixing groove 157a, and the second end of the connecting end 151a is disposed close to the motor 153.
- the fixing groove 157a formed by the second fixing shell 157 can partially accommodate the power supply 152 or the entire power supply 152, which is not limited here.
- the second fixed housing 157 may also have a ring structure or other structures, as long as it can extend or distribute substantially along the direction of the central axis 101 so as to reduce the space occupied by the receiving cavity 111.
- the second fixed housing 157 moves along the central axis 101.
- a fixing hole 157b is also formed thereon, and the fixing hole 157b extends along a linear direction parallel to the central axis 101.
- the second fixing housing 157 is fixedly connected to the housing 11 through the fixing hole 157b.
- the fixing hole 157b is a cylindrical structure formed around the straight line.
- the fixing hole 157b is also formed with a notch 157c so as to The contact between the second fixed housing 157 and the inner wall of the housing 11 when the second fixed housing 157 is assembled to the accommodating cavity 111 is reduced, thereby reducing the space for the housing 11 to accommodate the second fixed housing 157.
- the notch 157c is provided in the extension direction of the fixing hole 157b, and the notch 157c can also be used as a receiving groove to accommodate the inside of the housing 11 provided that the area where the notch 157c is formed can pass through the fasteners such as screws. Other structures. On the basis of making full use of the accommodating cavity 111, the notch 157c can also play a role in fastening the housing 11. By arranging the fixing hole 157b along the direction of the central axis 101, the radial size of the electric screwdriver 100 can be effectively reduced, and the overall size of the electric screwdriver 100 can be miniaturized.
- the motor 153, the gear box 155, the circuit board 151, the power supply 152 and the bit adapter shaft 154 constitute a driving integrated part 15.
- the space occupied by multiple components in the connected state can be effectively reduced, and the overall size of the electric screwdriver 100 can be miniaturized.
- the first housing 156a is further formed with a mounting hole 156b configured to fix the drive integration part 15 to the housing 11 (refer to FIG. 6).
- the mounting hole 156b is formed along a linear direction parallel to the central axis 101.
- the electric screwdriver 100 can output a torque greater than or equal to 0.9N ⁇ m and less than or equal to 3N ⁇ m, and while the electric screwdriver 100 outputs a greater torque, the housing 11 can also have a smaller size. .
- the ratio of the torque value output by the electric screwdriver 100 to the maximum diameter of the housing 11 is greater than or equal to 65 and less than or equal to 95, wherein the torque value is calculated in N ⁇ m and the diameter is calculated in m.
- the ratio of the torque value output by the electric screwdriver 100 to the maximum diameter of the housing 11 is greater than or equal to 70 and less than or equal to 80, wherein the torque value is calculated in N ⁇ m and the diameter is calculated in m.
- a connecting part 113 is also formed on the inner wall of the housing 11, and the connecting parts 113 are distributed on the axial position of the inner wall of the housing 11.
- the connecting portion 113 includes a first connecting hole 113a and a second connecting hole 113b, and the drive integration portion 15 is connected to the first connecting hole 113a and the second connecting hole 113b by a screw 16. ⁇ , so that it can be fixed to the housing 11.
- the first connecting holes 113a and the second connecting holes 113b are staggeredly distributed in the projection plane of the housing 11 perpendicular to the direction of the central axis 101, so as to prevent the first connecting holes 113a and the second connecting holes 113b from overlapping or partially overlapping along the direction of the central axis 101 This affects the assembly of the drive integration unit 15.
- the housing 11 is a cylinder extending along the direction of the central axis 101, and has a circumferential portion distributed around the central axis 101, and the connecting portion 113 where the first connecting hole 113a and the second connecting hole 113b are located protrudes inwardly ⁇ The circumference of the housing 11.
- the connecting portions 113 are distributed around the inner side of the circumference, so that the space of the receiving cavity 111 can be used to a greater extent.
- the first connection hole 113a and the second connection hole 113b are both provided with two groups.
- the two groups of the first connection hole 113a and the two groups of the second connection hole are respectively provided on both sides of the plane.
- the first connection hole 113a and the second connection hole 113b may also be provided on the inner wall of the housing 11 in other ways.
- the first connecting hole 113a and the second connecting hole 113b are both circular holes, and the centers of the two can be set on the same circumference around the central axis 101; or the first connecting hole 113a and the second connecting hole 113a The two centers of the hole 113b are respectively close to a circle around the central axis 101. As shown in FIG.
- the first connecting hole 113a and the second connecting hole 113b are respectively arranged at different positions, so that the internal space of the housing 11 can be fully utilized and effectively reduced The space occupied by the connecting part 113 when the driving integrated part 15 is connected.
- the overall size of the electric screwdriver 100 can be further reduced, and the utilization rate of the internal space of the housing 11 can be increased at the same time, so that the structure of the electric screwdriver 100 can be more compact and the appearance can be more refined. Easy to operate.
- the two connection positions are respectively in different spatial positions in the accommodating cavity 111.
- this connection form distributed and staggered along the direction of the central axis 101, the connection between the drive integration part 15 and the housing 11 saves connection space. Furthermore, the stability and reliability of the connection are enhanced, thereby achieving better performance of the electric screwdriver 100.
- the components included in the drive integration part 15 can be respectively fixed through the connection of the first connection hole 113a and the mounting hole 156b and the connection of the second connection hole 113b and the fixing hole 157b To the shell 11.
- the drive integration part 15 may be respectively disposed in the housing 11 through two openings of the housing 11 and spliced into a whole in the containing cavity 111 to be fixed to the housing 11.
- the integrated drive unit 15 when the integrated drive unit 15 is connected as a whole according to the above-mentioned connection method, the integrated drive unit 15 can be installed inside the housing 11 as a whole. Install the screw 16 to the mounting hole 156b and the first connecting hole 113a, and fix the motor 153 to the housing 11; then install the screw 16 to the fixing hole 157b and the second connecting hole 113b to fix the power supply 152 to the housing 11 .
- the fixing hole 157b and the mounting hole 156b are arranged in different areas, so as to ensure that the drive integrated part 15 can be stably fixed inside the housing 11 without shaking Or shake, and then seal the housing 11 through the back cover 14 and the front cover 13.
- the electric screwdriver 100 provided in this embodiment reduces the size of the electric screwdriver 100 by arranging the first fixed housing 156 and the second fixed housing 157 and designing the connection structure along the extension direction of the inner wall of the housing 11, and makes The assembly is more convenient; by integrating the driving part as the driving integrated part 15, the overall size of the electric screwdriver 100 is further reduced.
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Abstract
一种电动螺丝批（100），其具有第一固定壳体（156），设置为固定电机（153）和批头转接轴（154），第一固定壳体上形成有安装孔（156b）；及第二固定壳体（157），形成有固定电源（152）的固定槽（157a），第二固定壳体上形成有固定孔（157b）；其中，外壳（11）的内壁上设有沿平行于中心轴线的方向分布的第一连接孔（113a）和第二连接孔（113b）；当第一连接孔通过螺钉（16）与安装孔连接，且第二连接孔通过螺钉与固定孔连接时，第一固定壳体和第二固定壳体可连接至外壳上。
Description
本申请要求申请日为2019年3月14日、申请号为201920326204.2的中国专利申请的优先权，该申请的全部内容通过引用结合在本申请中。
本申请涉及电动工具领域，例如涉及一种电动螺丝批。
电动螺丝批作为一种装配作业所使用的工具，主要通过批头的正反转来拧松或拧紧螺钉。对于相关技术中的枪式螺丝批而言，输出功率大，适用范围也较广。然而，对于一些精密类产品而言，产品内部紧凑的结构并不适用于大型电动螺丝批拆装。因此，衍生出一些适用于精密仪器操作的筒式螺丝批。相关技术中，筒式螺丝批由于结构的特殊性，在设计和装配过程中，不可避免的导致体积较大，且装配不便的问题。
发明内容
本申请提供了一种电动螺丝批，该电动螺丝批体积较小且装配方便。
一实施例提供了一种电动螺丝批，包括：外壳，沿中心轴线方向延伸并形成有容纳腔；批头转接轴，设置为连接批头；电机，设置为驱动所述批头转接轴转动；电源，设置为给所述电机提供能源；电源接口，设置在所述外壳远离所述批头转接轴的一端；第一固定壳体，设置为固定所述电机和所述批头转接轴，所述第一固定壳体沿平行于所述中心轴线的直线方向形成有安装孔；及第二固定壳体，形成有设置为固定所述电源的固定槽，所述第二固定壳体沿平行于所述中心轴线的直线方向形成有固定孔；其中，所述外壳的内壁上设有沿平行于所述中心轴线的直线方向方向分布的第一连接孔和第二连接孔；当所述第一连接孔通过螺钉与所述安装孔连接，且所述第二连接孔通过螺钉与所述固定孔连接时，所述第一固定壳体和所述第二固定壳体可连接至所述外壳上。
一实施例提供一种电动螺丝批，包括：外壳，沿中心轴线方向延伸并形成有容纳腔；及驱动集成部，安装至所述容纳腔内；其中，所述驱动集成部包括：批头转接轴，设置为连接批头；电机，设置为驱动所述批头转接轴；及电源， 设置为给所述电机提供能源；其中，所述驱动集成部沿所述中心轴线方向设置，并形成有设置为连接至所述外壳的安装孔；所述外壳的内壁上形成有与所述驱动集成部连接的连接部，所述连接部沿所述中心轴线方向延伸，所述驱动集成部设置为当所述安装孔与所述连接部配合时，沿所述中心轴线方向连接至所述外壳上。
一实施例提供一种电动螺丝批，包括：外壳，沿中心轴线方向延伸并形成有容纳腔；批头转接轴，设置为连接批头；电机，设置为驱动所述批头转接轴转动；电池，设置为给所述电机提供能源；电源接口，设置在所述外壳上；及固定壳体，设置为固定所述电机和所述批头转接轴，所述固定壳体沿平行于所述中心轴线的直线方向形成有安装孔；其中，所述外壳的内壁上设有沿平行于所述中心轴线的直线方向分布的第一连接孔；所述固定壳体设置为当所述第一连接孔通过螺钉与所述安装孔连接时，连接至所述外壳上。
一实施例提供一种电动螺丝批，包括：外壳，沿中心轴线方向延伸并形成有容纳腔；批头转接轴，设置为连接批头；电机，设置为驱动所述批头转接轴转动；电源，设置为给所述电机提供能源；电源接口，设置在所述外壳远离所述批头转接轴的一端；第一固定壳体，设置为固定所述电机和所述批头转接轴，所述第一固定壳体沿平行于所述中心轴线的直线方向形成有安装孔；及第二固定壳体，形成有设置为固定所述电源的固定槽，所述第二固定壳体沿平行于所述中心轴线的直线方向形成有固定孔；其中，所述外壳的内壁上形成有设置为连接所述电机、所述批头转接轴和所述电源的连接部；所述外壳包括两个开口，所述电机和所述批头转接轴通过一个所述开口设于所述容纳腔内，所述电源通过另一个所述开口设于所述容纳腔内。
一实施例提供一种电动螺丝批，包括：外壳，沿中心轴线方向延伸并形成有容纳腔；批头转接轴，设置为连接批头；电机，设置为驱动所述批头转接轴转动；电池，设置为给电机提供能源；电源接口，设置在所述外壳上；及固定壳体，形成有设置为固定电源的固定槽，所述固定壳体沿平行于所述中心轴线的直线方向形成有固定孔；其中，所述外壳的内壁上设有沿平行于所述中心轴线的直线方向分布的连接孔；所述固定壳体设置为当所述连接孔通过螺钉与所述固定孔连接时，连接至所述外壳上。
图1是一实施例提供的电动螺丝批的立体图；
图2是图1中的电动螺丝批的另一视角的立体图；
图3是图1中的电动螺丝批的分解示意图；
图4是图3中的电动螺丝批的进一步分解示意图；
图5是图4中的电动螺丝批的另一视角的分解示意图；
图6是图5中的电动螺丝批的A处的局部放大图；
图7是图5中的电动螺丝批的B处的局部放大图；
图8是图3中的电动螺丝批的外壳的立体示意图；
图9是图8中电动螺丝批的外壳的C处的局部放大图；
图10是图1中的电动螺丝批去除后盖后的平面图；
图11是图10中的电动螺丝批的外壳的平面图；
图12是图1中的电动螺丝批从安装孔处剖切的剖视图；
图13时图1中的电动螺丝批从固定孔处剖切的剖视图。
如图1至图3所示的电动螺丝批100包括：外壳11、控制装置12、前盖13、后盖14和驱动集成部15。驱动集成部15设置在外壳11中，并通过前盖13和后盖14密封在外壳11内。外壳11为沿中心轴线101方向延伸的圆柱体，外壳11可以通过塑料或金属等材料注塑成一个整体。在一实施例中，外壳11也可以由两瓣式壳体拼凑而成，在此不作限制。外壳11的内部中空，形成有一个容纳腔111，外壳11的两端形成有两个开口，在两个开口处分别设置有连接前盖13和后盖14的连接端。外壳11的外壁上还形成有安装控制装置12的安装口112。在一实施方式中，前盖13与外壳11通过螺纹连接；后盖14与外壳11构成卡接。在一实施例中，前盖13或后盖14与外壳11的连接不限于上述连接方式，也可以是前盖13与外壳11构成卡接，后盖14与外壳11构成螺纹连接，或者是前盖13和后盖14均与外壳11构成卡接或螺纹连接，只要能实现前盖13和后盖14与外壳11的连接即可。
如图4至图5所示，驱动集成部15包括：电路板151、电源152、电机153和批头转接轴154。在一实施例中，也可以是电路板151、电源152、电机153和批头转接轴154等部件构成了前述驱动集成部15。其中，电路板151连接控制装置12，控制装置12设置为控制电动螺丝批100的输出。在一实施方式中，电动螺丝批100包括正转、反转、快转及慢转等多种工作模式，每种工作模式均可以通过控制 装置12实现调控。电机153设置为输出动力以驱动批头转接轴154转动。在一实施方式中，驱动集成部15还包括齿轮箱155，齿轮箱155与电机153连接，并将来自电机153的动力传递至批头转接轴154上。前盖13还形成有可供批头转接轴154穿过的通孔，批头转接轴154的第一端连接至齿轮箱155，批头转接轴154的第二端从通孔穿出，并可以连接不同型号的批头及相关附件，从而适应不同的工况。电源152设置为给电机153供电。在一实施例中，电源152和电机153分别与电路板151构成电连接。在一个平行于中心轴线101的直线方向上，电源152、电机153、齿轮箱155及批头转接轴154依次排布。在一实施例中，电源152可以采用USB充电的形式进行充电，从而能够反复使用，节能环保。后盖14上还设置有可供充电的电源接口141(参考图1)。
如图3所示，为了实现对电机153和齿轮箱155的固定和保护，在一实施方式中，驱动集成部15还包括第一固定壳体156。第一固定壳体156可以将电机153和齿轮箱155固定成一个整体，从而减小直至消除电机153和齿轮箱155之间可能产生的位移和震动。第一固定壳体156可以是环形壳体或其他形式的紧固件。在一实施例中，第一固定壳体156可以是一个能将电机153和齿轮箱155固定成一个整体的圆柱。在一实施例中，第一固定壳体156包括第一壳体156a和第二壳体156c。第一壳体156a和第二壳体156c均为圆弧形壳体，二者对接能够形成一个完整的圆柱，该圆柱内部中空，形成一个容纳电机153和齿轮箱155的容纳空间。一方面，第一壳体156a和第二壳体156c连接形成的容纳空间能够固定电机153和齿轮箱155，避免电机153在高速转动过程中，产生振动影响电机153与齿轮箱155之间的传动；另一方面，第一壳体156a和第二壳体156c还能起到防护作用，能够隔绝至少部分来自电机153与齿轮箱155之间的振动，避免该振动传递至外界，影响用户体验。通过第一壳体156a和第二壳体156c来固定电机153和齿轮箱155，可以避免外壳11为形成容纳电机153和齿轮箱155的容纳槽而增加额外的体积，可以促进驱动集成部15的集成化，减小驱动集成部15的体积，同时减小外壳11的体积。在一实施例中，第一固定壳体156作为一种固定结构，不会占用外壳11更多的空间，相反的，第一固定壳体156对电机153和齿轮箱155进行紧固，外壳11仅需形成容纳第一固定壳体156的容纳空间即可，而无需形成设置为固定电机153和齿轮箱155的复杂的内部凸筋和连接结构。
在一实施方式中，第一壳体156a和第二壳体156c分别通过螺钉连接齿轮箱155，从而能将第一壳体156a、第二壳体156c、电机153和齿轮箱155连接成一个 整体。电路板151通过驱动集成部15的第二固定壳体157固定并安装在第一壳体156a上。电路板151还形成或连接有设置为连接电源152的连接端151a，连接端151a包括两个。连接端151a一方面能卡住电源152，另一方面还与电源152构成电连接，从而实现电能的输出与传递。第二固定壳体157还设置为固定电源152，第二固定壳体157沿中心轴线101的方向延伸，并形成有固定槽157a(参考图7)。沿中心轴线101的方向上，固定槽157a的第一端开口，固定槽157a的第二端封闭。在一实施例中，在一个垂直于中心轴线101的直线方向上，固定槽157a还形成有缺口，缺口能便于连接端151a插入。在一实施例中，连接端151a的第一端设置在固定槽157a的第二端内，连接端151a的第二端设置在靠近电机153的位置。当电源152通过第二固定壳体157固定时，在外壳11内部不会产生相对位移，且与电机153之间的位置相对固定。在一实施例中，第二固定壳体157形成的固定槽157a可以部分容纳电源152，也可以容纳整个电源152，这里不做限制。在一实施方式中，第二固定壳体157还可以是环形结构或其他结构，只要能基本沿中心轴线101的方向延伸或分布，从而能减小占用容纳腔111的空间即可。如图6至图7所示，当电源152安装至该固定槽157a时，为了避免电源152和第二固定壳体157在容纳腔111内活动，第二固定壳体157在沿中心轴线101方向上还形成有固定孔157b，固定孔157b沿一个平行于中心轴线101的直线方向延伸，第二固定壳体157通过固定孔157b与外壳11实现固定连接。
如图7所示，在一个平行于中心轴线101的直线方向上，固定孔157b为围绕该直线形成的圆柱形结构，为适应外壳11的内部结构，固定孔157b还形成有缺口157c，从而能够减小第二固定壳体157装配至容纳腔111时与外壳11的内壁的触碰，进而能够减小外壳11容纳第二固定壳体157的空间。在一实施例中，缺口157c设置在固定孔157b的延伸方向，缺口157c所在的区域在形成可供螺钉等紧固件通过的前提下，缺口157c还可以作为一个容纳槽以容纳外壳11内部的其他结构。缺口157c在充分利用容纳腔111中的基础上，还能起到对外壳11的紧固作用。通过沿中心轴线101方向设置固定孔157b，可以有效的减小电动螺丝批100径向的尺寸，实现电动螺丝批100整机的小型化。当电源152安置至固定槽157a时，上述电机153、齿轮箱155、电路板151、电源152及批头转接轴154构成一个驱动集成部15。通过这种集成设计，可以有效的减小多个部件在连接状态下所占用的空间，实现电动螺丝批100整体体积小型化。为了实现驱动集成部15的进一步的小型化，沿中心轴线101的方向上，第一壳体156a还形成有设置为将驱动 集成部15固定至外壳11的安装孔156b(参考图6)。安装孔156b沿一个平行中心轴线101的直线方向形成。在一实施方式中，电动螺丝批100能输出大于等于0.9N·m且小于等于3N·m的扭力，而在电动螺丝批100输出较大扭力的同时，还能实现外壳11具有较小的尺寸。在一实施方式中，电动螺丝批100输出的扭力值与外壳11的最大直径之比大于等于65且小于等于95，其中，扭力值以N·m为计算单位，直径以m为计算单位。在一实施方式中，电动螺丝批100输出的扭力值与外壳11的最大直径之比大于等于70且小于等于80，其中，扭力值以N·m为计算单位，直径以m为计算单位。而当电动螺丝批100输出的扭力值与外壳11的最大直径之比达到80时，能被较好的操作，且适用的范围更广。
如图8至图13所示，为了将驱动集成部15固定在外壳11内，外壳11的内壁上还形成有连接部113，连接部113分布在外壳11内壁的轴向位置上。为了实现对固定孔157b和安装孔156b的有效配合，连接部113包括第一连接孔113a和第二连接孔113b，驱动集成部15通过螺钉16连接至第一连接孔113a和第二连接孔113b上，从而能够固定至外壳11上。第一连接孔113a和第二连接孔113b在外壳11垂直于中心轴线101方向的投影面内交错分布，从而能够避免第一连接孔113a和第二连接孔113b沿中心轴线101方向重合或部分重合而影响驱动集成部15的装配。在一实施例中，外壳11为沿中心轴线101方向延伸的圆柱体，且具有围绕中心轴线101分布的圆周部，第一连接孔113a和第二连接孔113b所在的连接部113向内凸出于外壳11的圆周部。连接部113围绕圆周部内侧分布，从而能更大限度的利用容纳腔111的空间。本实施例中，第一连接孔113a和第二连接孔113b均设置有两组，在一个同时经过中心轴线101和电源接口141的平面上，两组第一连接孔113a和两组第二连接孔113b分别设置在该平面的两侧。
第一连接孔113a和第二连接孔113b还可以以其他方式设置在外壳11的内壁上。在一实施例中，第一连接孔113a和第二连接孔113b均采用圆形孔，二者的圆心可以设置在围绕中心轴线101的同一个圆周上；或者第一连接孔113a和第二连接孔113b的两个圆心分别靠近一个围绕中心轴线101的圆周。如图11所示，沿中心轴线101的延伸方向上，第一连接孔113a和第二连接孔113b分别设置在不同的位置，从而使得外壳11的内部空间能够被充分利用，并能有效减小连接驱动集成部15时连接部113的占用空间。通过这样的设计，一方面能够进一步减小电动螺丝批100的整机尺寸，同时增加了外壳11的内部空间的利用率，使得电动螺丝批100的结构更加紧凑，外形也能做到更加精致，便于操作。通过将第一连接 孔113a和第二连接孔113b设置在外壳11的轴向或径向上且分别交错布置，同时在第一连接孔113a和安装孔156b连接，及第二连接孔113b和固定孔157b连接时，两个连接位置分别处于容纳腔111中的不同空间位置，通过这种沿中心轴线101方向分布且交错布置的连接形式，驱动集成部15与外壳11的连接既节约了连接空间，又增强了连接的稳定性和可靠性，从而实现电动螺丝批100较佳的性能。
驱动集成部15按照上述连接方式设置在外壳11内时，可以通过第一连接孔113a和安装孔156b连接及第二连接孔113b和固定孔157b连接将驱动集成部15所包括的零部件分别固定至外壳11上。在一实施例中，驱动集成部15可以通过外壳11的两个开口分别设置在外壳11内，并在容纳腔111内拼接成一个整体，进而固定至外壳11上。
在一实施例中，还可以将驱动集成部15按照上述连接方式连接成一个整体时，将驱动集成部15整体安装至外壳11内部。将螺钉16安装至安装孔156b和第一连接孔113a上，把电机153固定至外壳11上；再将螺钉16安装至固定孔157b和第二连接孔113b上，把电源152固定至外壳11上。在一实施例中，在沿中心轴线101的方向上，固定孔157b和安装孔156b设置在不同区域内，这样可以确保驱动集成部15能够被稳定的固定在外壳11内部，而不至于产生晃动或震动，再通过后盖14和前盖13密封外壳11。
本实施例提供的电动螺丝批100通过设置第一固定壳体156和第二固定壳体157以及在沿外壳11的内壁的延伸方向上设计连接结构减小了电动螺丝批100的尺寸，并使得装配更加方便；通过将驱动部分集成设置为驱动集成部15，进一步减小了电动螺丝批100的整机尺寸。
Claims (49)
- 一种电动螺丝批，包括：外壳，沿中心轴线方向延伸并形成有容纳腔；批头转接轴，设置为连接批头；电机，设置为驱动所述批头转接轴转动；电源，设置为给所述电机提供能源；电源接口，设置在所述外壳远离所述批头转接轴的一端；第一固定壳体，设置为固定所述电机和所述批头转接轴，所述第一固定壳体沿平行于所述中心轴线的直线方向上形成有安装孔；及第二固定壳体，形成有设置为固定所述电源的固定槽，所述第二固定壳体沿平行于所述中心轴线的直线方向上形成有固定孔；其中，所述外壳的内壁上设有沿平行于所述中心轴线的直线方向分布的第一连接孔和第二连接孔；当所述第一连接孔通过螺钉与所述安装孔连接，且所述第二连接孔通过螺钉与所述固定孔连接时，所述第一固定壳体和所述第二固定壳体可连接至所述外壳上。
- 根据权利要求1所述的电动螺丝批，还包括前盖和后盖，所述外壳包括两个开口，所述前盖设置为封闭一个所述开口；所述后盖设置为封闭另一个所述开口。
- 根据权利要求1所述的电动螺丝批，还包括：电路板，分别与所述电机和所述电源电连接，且设置为控制所述电源和所述电机；及齿轮箱，所述齿轮箱的第一端与所述电机连接至所述电机，所述齿轮箱的第二端与所述批头转接轴连接，所述齿轮箱设置为传递所述电机的动力至所述批头转接轴。
- 根据权利要求3所述的电动螺丝批，还包括设置为控制所述电机输出的控制装置，所述外壳还形成有设置为安装所述控制装置的安装口，所述控制装置与所述电路板电连接。
- 根据权利要求3所述的电动螺丝批，其中，所述电路板形成或连接有设置为连接所述电源的连接端，所述连接端的第一端设置在所述固定槽中，所述连接端的第二端设置在所述电机处。
- 根据权利要求1所述的电动螺丝批，其中，所述第一固定壳体包括第一壳体和第二壳体，所述第一壳体和所述第二壳体连接形成容纳空间；所述安装孔 形成于所述第一壳体上。
- 根据权利要求1所述的电动螺丝批，其中，所述外壳沿所述中心轴线方向具有一个垂直于所述中心轴线的投影面，所述第一连接孔和所述第二连接孔沿所述中心轴线方向的投影在所述投影面内交错分布。
- 根据权利要求1所述的电动螺丝批，其中，所述第一连接孔和所述第二连接孔包括两组，在同时经过所述中心轴线和所述电源接口的平面上，所述两组第一连接孔和所述两组第二连接孔分别设置在所述平面的两侧。
- 根据权利要求1所述的电动螺丝批，其中，所述电动螺丝批输出的扭力值与所述外壳的最大直径之比大于等于65且小于等于95；所述扭力值以N·m为计算单位，所述直径以m为计算单位。
- 根据权利要求9所述的电动螺丝批，其中，所述电动螺丝批输出的扭力值与所述外壳的最大直径之比大于等于70且小于等于80；所述扭力值以N·m为计算单位，所述直径以m为计算单位。
- 一种电动螺丝批，包括：外壳，沿中心轴线方向延伸并形成有容纳腔；及驱动集成部，安装至所述容纳腔内；其中，所述驱动集成部包括：批头转接轴，设置为连接批头；电机，设置为驱动所述批头转接轴；及电源，设置为给所述电机提供能源；其中，所述驱动集成部沿所述中心轴线方向设置，并形成有设置为连接至所述外壳的安装孔；所述外壳的内壁上形成有与所述驱动集成部连接的连接部，所述连接部沿所述中心轴线方向延伸，所述驱动集成部设置为当所述安装孔与所述连接部配合时，沿所述中心轴线方向连接至所述外壳上。
- 根据权利要求11所述的电动螺丝批，其中，所述驱动集成部包括：电路板，与所述电机和所述电源电连接，并设置为控制所述电源和所述电机；及齿轮箱，所述齿轮箱的第一端与所述电机连接，所述齿轮箱的第二端与所述批头转接轴连接，所述齿轮箱设置为传递所述电机的动力至所述批头转接轴。
- 根据权利要求12所述的电动螺丝批，还包括设置为控制所述电机输出的 控制装置，所述外壳还形成有设置为安装所述控制装置的安装口，所述控制装置与所述电路板电连接。
- 根据权利要求12所述的电动螺丝批，其中，所述驱动集成部还包括第一固定壳体；所述第一固定壳体形成有容纳空间，所述安装孔形成于所述第一固定壳体上。
- 根据权利要求14所述的电动螺丝批，其中，所述第一固定壳体包括第一壳体和第二壳体，所述第一壳体和所述第二壳体连接形成所述容纳空间；所述安装孔形成于所述第一壳体上。
- 根据权利要求15所述的电动螺丝批，其中，所述驱动集成部还包括第二固定壳体，所述第二固定壳体形成有设置为固定所述电源的固定槽；所述第二固定壳体沿平行于所述中心轴线的直线方向上形成有固定孔。
- 根据权利要求16所述的电动螺丝批，其中，所述电路板形成或连接有设置为连接所述电源的连接端，所述连接端的第一端设置在所述固定槽中，所述连接端的第二端设置在所述电机处。
- 根据权利要求17所述的电动螺丝批，其中，所述连接部包括沿平行于所述中心轴线的直线方向分布的第一连接孔和第二连接孔；所述第一连接孔与所述安装孔配合；所述第二连接孔与所述固定孔配合。
- 根据权利要求18所述的电动螺丝批，其中，所述外壳沿所述中心轴线方向具有垂直于所述中心轴线方向的投影面，所述第一连接孔和所述第二连接孔沿所述中心轴线方向的投影在所述投影面内交错分布。
- 根据权利要求11所述的电动螺丝批，其中，所述电动螺丝批输出的扭力值与所述外壳的最大直径之比大于等于65且小于等于95；所述扭力值以N·m为计算单位，所述直径以m为计算单位。
- 根据权利要求20所述的电动螺丝批，其中，所述电动螺丝批输出的扭力值与所述外壳的最大直径之比大于等于70且小于等于80；所述扭力值以N·m为计算单位，所述直径以m为计算单位。
- 一种电动螺丝批，包括：外壳，沿中心轴线方向延伸并形成有容纳腔；批头转接轴，设置为连接批头；电机，设置为驱动所述批头转接轴转动；电池，设置为给所述电机提供能源；电源接口，设置在所述外壳上；及固定壳体，设置为固定所述电机和所述批头转接轴，所述固定壳体沿平行于所述中心轴线的直线方向形成有安装孔；其中，所述外壳的内壁上设有沿平行于所述中心轴线的直线方向分布的第一连接孔；所述固定壳体设置为当所述第一连接孔通过螺钉与所述安装孔连接时，连接至所述外壳上。
- 根据权利要求22所述的电动螺丝批，其中，所述电源接口为USB接口。
- 根据权利要求22所述的电动螺丝批，还包括前盖和后盖；所述外壳包括两个开口，所述前盖设置为封闭一个所述开口；所述后盖设置为封闭另一个所述开口。
- 根据权利要求22所述的电动螺丝批，还包括：电路板，与所述电机和所述电源电连接，且设置为控制所述电源和所述电机；及齿轮箱，所述齿轮箱的第一端与所述电机连接，所述齿轮箱的第二端与所述批头转接轴连接，所述齿轮箱设置为传递所述电机的动力至所述批头转接轴。
- 根据权利要求25所述的电动螺丝批，还包括设置为控制所述电机输出的控制装置，所述外壳还形成有设置为安装所述控制装置的安装口，所述控制装置与所述电路板电连接。
- 根据权利要求25所述的电动螺丝批，其中，所述电路板形成或连接有设置为连接所述电源的连接端，所述固定壳体上形成有设置为固定所述电源的固定槽，所述连接端的第一端设置在所述固定槽中，所述连接端的第二端设置在所述电机处。
- 根据权利要求22所述的电动螺丝批，其中，所述固定壳体包括第一壳体和第二壳体，所述第一壳体和所述第二壳体连接形成容纳空间；所述安装孔形成于所述第一壳体上。
- 根据权利要求22所述的电动螺丝批，其中，所述电动螺丝批输出的扭力值与所述外壳的最大直径之比大于等于65且小于等于95；所述扭力值以N·m为计算单位，所述直径以m为计算单位。
- 根据权利要求29所述的电动螺丝批，其中，所述电动螺丝批输出的扭力值与所述外壳的最大直径之比大于等于70且小于等于80；所述扭力值以N·m为计算单位，所述直径以m为计算单位。
- 一种电动螺丝批，包括：外壳，沿中心轴线方向延伸并形成有容纳腔；批头转接轴，设置为连接批头；电机，设置为驱动所述批头转接轴转动；电源，设置为给所述电机提供能源；电源接口，设置在所述外壳远离所述批头转接轴的一端；第一固定壳体，设置为固定所述电机和所述批头转接轴，所述第一固定壳体沿平行于所述中心轴线的直线方向形成有安装孔；及第二固定壳体，形成有设置为固定所述电源的固定槽，所述第二固定壳体沿平行所述中心轴线的直线方向形成有固定孔；其中，所述外壳的内壁上形成有设置为连接所述电机、所述批头转接轴和所述电源的连接部；所述外壳包括两个开口，所述电机和所述批头转接轴通过一个所述开口设于所述容纳腔内，所述电源通过另一个所述开口设于所述容纳腔内。
- 根据权利要求31所述的电动螺丝批，其中，所述连接部包括沿平行于所述中心轴线的直线方向分布的第一连接孔和第二连接孔；当所述第一连接孔通过螺钉与所述安装孔连接，且所述第二连接孔通过螺钉与所述固定孔连接时，所述第一固定壳体和所述第二固定壳体可连接至所述外壳上。
- 根据权利要求31所述的电动螺丝批，还包括前盖和后盖；所述前盖设置为封闭所述外壳的一个所述开口；所述后盖设置为封闭所述外壳的另一个所述开口。
- 根据权利要求31所述的电动螺丝批，还包括：电路板，与所述电机和所述电源电连接，且设置为控制所述电源和所述电机；及齿轮箱，所述齿轮箱的第一端与所述电机连接，所述齿轮箱的第二端与所述批头转接轴连接，所述齿轮箱设置为传递所述电机的动力至所述批头转接轴。
- 根据权利要求34所述的电动螺丝批，还包括设置为控制所述电机输出的控制装置，所述外壳还形成有设置为安装所述控制装置的安装口，所述控制装置与所述电路板电连接。
- 根据权利要求34所述的电动螺丝批，其中，所述电路板形成或连接有设置为连接所述电源的连接端，所述连接端的第一端设置在所述固定槽中，所述 连接端的第二端设置在所述电机处。
- 根据权利要求31所述的电动螺丝批，其中，所述第一固定壳体包括第一壳体和第二壳体，所述第一壳体和所述第二壳体连接形成容纳空间；所述安装孔形成于所述第一壳体上。
- 根据权利要求32所述的电动螺丝批，其中，所述外壳沿所述中心轴线方向具有垂直于所述中心轴线的投影面，所述第一连接孔和所述第二连接孔沿所述中心轴线方向的投影在所述投影面内交错分布。
- 根据权利要求32所述的电动螺丝批，其中，所述第一连接孔和所述第二连接孔包括两组，在同时经过所述中心轴线和所述电源接口的平面上，所述两组第一连接孔和所述两组第二连接孔分别设置在所述平面的两侧。
- 根据权利要求31所述的电动螺丝批，其中，所述电动螺丝批输出的扭力值与所述外壳的最大直径之比大于等于65且小于等于95，所述扭力值以N·m为计算单位，所述直径以m为计算单位。
- 根据权利要求40所述的电动螺丝批，其中，所述电动螺丝批输出的扭力值与所述外壳的最大直径之比大于等于70且小于等于80，其中，所述扭力值以N·m为计算单位，所述直径以m为计算单位。
- 一种电动螺丝批，包括：外壳，沿中心轴线方向延伸并形成有容纳腔；批头转接轴，设置为连接批头；电机，设置为驱动所述批头转接轴转动；电池，设置为给所述电机提供能源；电源接口，设置在所述外壳上；及固定壳体，形成有设置为固定所述电源的固定槽，所述固定壳体沿平行于所述中心轴线的直线方向形成有固定孔；其中，所述外壳的内壁上设有沿平行于所述中心轴线的直线方向分布的连接孔；所述固定壳体设置为当所述连接孔通过螺钉与所述固定孔连接时，连接至所述外壳上。
- 根据权利要求42所述的电动螺丝批，其中，所述电源接口为USB接口。
- 根据权利要求42所述的电动螺丝批，还包括前盖和后盖；所述外壳包括两个开口，所述前盖设置为封闭一个所述开口；所述后盖设置为封闭另一个所述开口。
- 根据权利要求42所述的电动螺丝批，还包括：电路板，与所述电机和所述电源电连接，且设置为控制所述电源和所述电机；及齿轮箱，所述齿轮箱的第一端与所述电机连接，所述齿轮箱的第二端与所述批头转接轴连接至，所述齿轮箱设置为传递所述电机的动力至所述批头转接轴。
- 根据权利要求45所述的电动螺丝批，还包括设置为控制所述电机输出的控制装置，所述外壳还形成有设置为安装所述控制装置的安装口，所述控制装置与所述电路板电连接。
- 根据权利要求45所述的电动螺丝批，其中，所述电路板形成或连接有设置为连接所述电源的连接端，所述连接端的第一端设置在所述固定槽中，所述连接端的第二端设置在所述电机处。
- 根据权利要求42所述的电动螺丝批，其中，所述电动螺丝批输出的扭力值与所述外壳的最大直径之比大于等于65且小于等于95，所述扭力值以N·m为计算单位，所述直径以m为计算单位。
- 根据权利要求42所述的电动螺丝批，其中，所述电动螺丝批输出的扭力值与所述外壳的最大直径之比大于等于70且小于等于80，所述扭力值以N·m为计算单位，所述直径以m为计算单位。
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| DE20308714U1 (de) * | 2003-06-04 | 2003-08-14 | Hung-Pin Co. Ltd., Shengang, Taichung | Pneumatischer Schraubenschlüssel |
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