说明书 Instruction manual
一种装卸快捷的钻夹头 技术领域 A quick and convenient drill chuck
本发明涉及一种钻夹头，尤其涉及一种安装在机械加工设备及电动工具例如 钻床、 电钻上的钻夹头。 背景技术 The present invention relates to a drill chuck, and more particularly to a drill chuck mounted on a machining apparatus and a power tool such as a drill press or an electric drill. Background technique
现有技术中， 手紧钻夹头中设有钻体、 夹爪、 螺母、 可旋转的前套、 后套， 前套轴向被定位，三只夹爪分别设置在均布于钻体上的三个斜孔内， 螺母与夹爪 之间采用螺纹连接，前套直接或间接与螺母连接并通过带动螺母旋转从而带动夹 爪在斜孔内进出而使钻夹头夹紧或松脱钻具，钻体的后端面开设有与驱动轴连接 的连接孔， 钻夹头利用该连接孔与机床或手枪电钻连接。 目前， 所述连接孔一般 为螺纹孔，将钻夹头安装到机床或手枪电钻上或从其上拆除时， 需要一圈一圈地 旋， 操作费时又麻烦。尤其对于手枪电钻来说， 这种连接结构严重影响手枪电钻 的使用便利性。 发明内容 In the prior art, the hand drill chuck is provided with a drill body, a jaw, a nut, a rotatable front sleeve and a rear sleeve, and the front sleeve is axially positioned, and the three jaws are respectively disposed on the drill body. In the three inclined holes, the nut and the clamping jaw are screwed together, and the front sleeve is directly or indirectly connected with the nut and rotates by driving the nut to drive the clamping jaw into and out of the inclined hole to clamp or loosen the drilling chuck. The rear end surface of the drill body is provided with a connecting hole connected to the driving shaft, and the drill chuck is connected with the machine tool or the pistol drill. At present, the connecting hole is generally a threaded hole. When the drill chuck is mounted on or removed from a machine tool or a pistol drill, it needs to be rotated one turn or another, which is time consuming and troublesome. Especially for pistol drills, this connection structure seriously affects the ease of use of the pistol drill. Summary of the invention
本发明所要解决的技术问题是提供一种能实现与电机轴快速连接且连接可 靠、 结构简单的装卸快捷的钻夹头。 为此， 本发明采用以下技术方案： 它包括钻 体， 自钻体的后端向钻体内延伸设有轴向的电机轴孔，钻体的后部还设有垂直于 电机轴孔的限位孔， 限位孔中设有针对电机轴的可活动的限位部件，所述钻夹头 还设有操控所述限位部件使其与电机轴限位配合和脱离限位配合状态的装置，所 述电机轴孔中沿电机轴孔的轴向设有能与电机轴连接的扭力传递柱。由于采用本 发明的上述技术方案，本发明所提供的钻夹头能与装有配套电机轴的机床或手枪 电钻实现快速连接和拆卸， 并且， 扭力传递结构更为可靠， 能提高钻夹头的切削The technical problem to be solved by the present invention is to provide a drill chuck which can realize quick connection with the motor shaft and has reliable connection and simple structure. To this end, the present invention adopts the following technical solution: It comprises a drill body, and an axial motor shaft hole extends from a rear end of the drill body to the drill body, and a rear portion of the drill body is further provided with a limit perpendicular to the motor shaft hole. a movable limiting member for the motor shaft is disposed in the limiting hole, and the drilling chuck is further provided with a device for controlling the limiting member to cooperate with the motor shaft limit position and to be out of the limit matching state. A torque transmission column that can be coupled to the motor shaft is disposed in the axial direction of the motor shaft hole in the motor shaft hole. Due to the above technical solution of the present invention, the drill chuck provided by the present invention can be combined with a machine tool or a pistol equipped with a matching motor shaft. The electric drill enables quick connection and disassembly, and the torque transmission structure is more reliable, which can improve the cutting of the drill chuck.
在采用上述技术方案的基础上， 本发明还可采用以下进一步的技术方案： 所述操控所述限位部件使其与电机轴限位配合和脱离限位配合状态的装置 设有以下结构： 安装所述限位部件的可滑动的环，可被按压而操纵所述环运动使 所述限位部件与电机轴脱离限位配合状态的按钮，支撑所述环并在所述按钮被释 放后使所述限位部件与电机轴限位配合的弹簧件。On the basis of the above technical solution, the present invention can also adopt the following further technical solutions: The device for controlling the limiting component to cooperate with the motor shaft limit position and the disengaged limit state has the following structure: a slidable ring of the limiting member, a button that can be pressed to manipulate the ring movement to disengage the limiting member from the motor shaft from a limit fit state, support the ring and enable the button to be released after the button is released The spring member is matched with the limit of the motor shaft.
所述按钮与所述限位部件分别处于钻体的两侧，所述弹簧件为形状对称的弧 形弹簧片，所述弹簧片与所述限位部件处于钻体的同一侧，所述环具有与弹簧片 配合的弧形面。 The button and the limiting member are respectively located at two sides of the drill body, the spring member is a shape-symmetrical curved spring piece, and the spring piece and the limiting member are on the same side of the drill body, the ring It has a curved surface that cooperates with the spring piece.
在钻夹头的后部设有后套，所述环处于后套内，所述后套内设有所述环的支 撑板， 所述弹簧件处于后套内， 所述按钮暴露在后套的表面， 所述环的外表面和 所述后套内设有环滑动的导向面。 a rear sleeve is disposed at a rear portion of the drill chuck, the ring is located in the rear sleeve, a support plate of the ring is disposed in the rear sleeve, the spring member is located in the rear sleeve, and the button is exposed to the back sleeve The surface of the ring and the rear sleeve are provided with a ring sliding guide surface.
它在后套的后端设有所述环的限位盖板，所述后套内设有限位盖板的支撑台 阶。 It is provided with a limit cover plate of the ring at the rear end of the rear sleeve, and a support step of the limit cover plate is arranged in the rear sleeve.
所述操控所述限位部件使其与电机轴限位配合和脱离限位配合状态的装置 设有以下结构：设于钻体后部的定位部件，在钻体的后部所设的可转动的控制套， 所述控制套内壁设有与定位部件配合的定位凹槽，控制套内壁还设有与所述限位 部件配合而使其前进和供其后退的结构。 The device for controlling the limiting component to cooperate with the motor shaft limit position and the disengaged engagement state is provided with the following structure: a positioning component disposed at the rear of the drill body, and a rotatable device disposed at the rear of the drill body The inner sleeve of the control sleeve is provided with a positioning groove matched with the positioning component, and the inner wall of the control sleeve is further provided with a structure that cooperates with the limiting component to advance and retreat.
所述限位部件包括分别处于两端的钢珠以及处于中间的顶柱。 The limiting member includes steel balls at both ends and a top column in the middle.
所述与限位部件配合而使其前进和供其后退的结构为沿控制套内壁周向所 设的供限位部件后退时的让位凹槽和嵌在后套内壁的将限位部件向电机轴的方 向顶的嵌件。 The structure that cooperates with the limiting member to advance and retreat is such that the retaining groove when the limiting member is disposed along the circumferential direction of the inner wall of the control sleeve and the retaining member embedded in the inner wall of the rear sleeve The insert in the direction of the motor shaft.
所述扭力传递柱的外表面与电机轴配合连接，所述扭力传递柱与电机轴孔之 间具有供电机轴插入的环形空间。 The outer surface of the torsion transmission column is coupled to the motor shaft, and the toroidal transmission column and the motor shaft hole have an annular space into which the power supply shaft is inserted.
所述扭力传递柱呈台阶状， 一端为扭力输入部分， 另一端为扭力输出部分， 扭力输出部分较扭力输入部分粗。The torsion transmission column is stepped, one end is a torque input part, and the other end is a torque output part, The torque output portion is thicker than the torque input portion.
于所述扭力传递柱的扭力输入部分呈六棱柱形， 其扭力输出部分呈圆柱形， 所述钻体在电机轴孔的内侧设有与扭力传递柱连接的、 输入扭力的定位孔。 The torsion input portion of the torsion transmission column has a hexagonal prism shape, and the torsion output portion has a cylindrical shape. The drill body is provided with a positioning hole for inputting a torsion force connected to the torsion transmission column on the inner side of the motor shaft hole.
附图说明DRAWINGS
图 1为本发明实施例 1的外观示意图。 1 is a schematic view of the appearance of Embodiment 1 of the present invention.
图 2为实施例 1的局剖图。 Figure 2 is a partial cross-sectional view of Embodiment 1.
图 3为实施例 1的爆炸图。 Figure 3 is an exploded view of Embodiment 1.
图 4为当释放按钮时， 图 2的 A-A剖视图。 Figure 4 is a cross-sectional view taken along line A-A of Figure 2 when the button is released.
图 5为当按下按钮时， 图 2的 A-A剖视图。 Figure 5 is a cross-sectional view taken along line A-A of Figure 2 when the button is pressed.
图 6为实施例 1的环的示意图。 Figure 6 is a schematic illustration of the ring of Example 1.
图 7为实施例 1的后套示意图。 Figure 7 is a schematic view of the back cover of the embodiment 1.
图 8为本发明中的电机轴的剖视图。 Figure 8 is a cross-sectional view of the motor shaft in the present invention.
图 9为本发明所提供实施例 2的半剖视图，示出本实施例钻夹头和电机轴的主 要内部结构和外形。 Figure 9 is a half cross-sectional view showing a second embodiment of the present invention, showing the main internal structure and outer shape of the drill chuck and the motor shaft of the present embodiment.
图 10为本发明所提供实施例的主要结构爆炸图，示出钻夹头和电机轴的零部 件形状和安装顺序。 Figure 10 is an exploded view of the main structure of the embodiment of the present invention showing the shape and mounting sequence of the components of the drill chuck and motor shaft.
图 11为电机轴被轴向锁定时， 图 9中沿 A-A的剖视图。 Figure 11 is a cross-sectional view taken along line A-A of Figure 9 when the motor shaft is axially locked.
图 12为钻夹头脱出电机轴后， 图 9中沿 A-A的剖视图。 Figure 12 is a cross-sectional view taken along line A-A of Figure 9 after the drill chuck has been pulled out of the motor shaft.
图 13a为本发明所提供实施例安装扭力传递柱的钻体剖视图。 Figure 13a is a cross-sectional view of a drill body in which a torque transmitting column is mounted in accordance with an embodiment of the present invention.
图 13b为图 13a的 B-B剖视图。 具体实施方式 Figure 13b is a cross-sectional view taken along line B-B of Figure 13a. detailed description
实施例 1， 参照图 1-8 参照附图。 本发明包括钻体 1， 自钻体的后端向钻体内延伸设有轴向的电机 轴孔 11， 钻体的后部还设有限位孔 13， 限位孔中设有针对电机轴 4的可活动的 限位部件 8， 所述钻夹头还设有操控所述限位部件 8使其与电机轴 4限位配合和 脱离限位配合状态的装置， 所述电机轴孔 13中沿电机轴孔的轴向设有能与电机 轴连接的扭力传递柱 12， 以钻夹头的尾部至头部的方向为向下的方向， 所述扭 力传递柱的上端处于所述限位孔的下方。 所述限位部件 8可采用柱销形式。Embodiment 1 Referring to Figures 1-8, reference is made to the accompanying drawings. The invention comprises a drill body 1. The rear end of the drill body extends into the drill body and is provided with an axial motor shaft hole 11. The rear portion of the drill body is further provided with a limit hole 13, and the limit hole is provided with a motor shaft 4 a movable limiting member 8 , the drill chuck is further provided with the limiting member 8 for controlling the motor shaft 4 a device for disengaging the limit matching state, wherein the motor shaft hole 13 is provided with a torque transmitting column 12 connected to the motor shaft along the axial direction of the motor shaft hole, and the tail to the head of the drill chuck is downward. In the direction, the upper end of the torque transmitting column is below the limiting hole. The limiting member 8 can be in the form of a pin.
所述操控所述限位部件使其与电机轴限位配合和脱离限位配合状态的装置 设有以下结构： 安装所述限位部件 8的可滑动的环 5， 可被按压而操纵所述环运 动使所述限位部件与电机轴脱离限位配合状态的按钮 3， 支撑所述环并在所述按 钮被释放后使所述限位部件与电机轴限位配合的弹簧件 6。 按钮 3可以是与环 5 分离的部件， 也可以是连接在环 5上而构成环 5的一部分。 The device for controlling the limiting member to be engaged with the motor shaft limit and disengaging from the limit matching state is provided with the following structure: a slidable ring 5 mounting the limiting member 8 can be pressed to manipulate the The ring 3 moves the button 3 from the motor shaft out of the limit matching state, and supports the ring and releases the spring member 6 of the limiting member to the motor shaft after the button is released. The button 3 may be a separate component from the ring 5 or may be attached to the ring 5 to form part of the ring 5.
所述按钮 3与所述限位部件 8分别处于钻体 1的两侧，所述弹簧件 6为形状 对称的弧形弹簧片，所述弧形弹簧片与所述限位部件处于钻体的同一侧，在本实 施例中，按钮 3为与环 5分离的部件，所述环 5具有与弧形弹簧片配合的弧形面。 这样， 弹簧件、 环、 按钮形成稳定的配合关系。 The button 3 and the limiting member 8 are respectively located on two sides of the drill body 1. The spring member 6 is a shape-symmetrical curved spring piece, and the curved spring piece and the limiting member are in the drill body. On the same side, in the present embodiment, the button 3 is a separate component from the ring 5, and the ring 5 has an arcuate face that cooperates with the curved spring piece. Thus, the spring member, the ring, and the button form a stable mating relationship.
在钻夹头的后部还设有后套 2， 所述环 5处于后套 2内， 所述后套内设有所 述环 5的支撑板 22， 所述弹簧件 6处于后套内， 所述按钮 3从后套上的孔 21露 出后套表面。 所述环的外表面和所述后套内设有环滑动的导向面 51、 23。 A rear sleeve 2 is further disposed at a rear portion of the drill chuck, the ring 5 is located in the rear sleeve 2, and the support sleeve 22 of the ring 5 is disposed in the rear sleeve, and the spring member 6 is located in the rear sleeve. The button 3 exposes the back cover surface from the aperture 21 in the back cover. The outer surface of the ring and the rear sleeve are provided with guide surfaces 51, 23 for ring sliding.
本实施例在后套的后端设有所述环的限位盖板 7， 所述后套内设有限位盖板 的支撑台阶 24。与钻体连接的卡圈 93压在限位盖板 7上，从而从后部限定后套， 钻体上的台阶从前部限定后套， 因而后套不能相对钻体前后滑动，钻体上的平面 14使得后套不能相对钻体转动。环 5在轴向上被限位盖板 7和支撑板 22所定位， 本实施例以手紧钻夹头为例， 附图标号 94为螺母、 附图标号 91为夹爪 91， 螺母为两半式结构， 安装在钻体中部的螺母槽中， 前套 92与螺母的两个半体连 接， 从而将它们合成为一个完整的螺母并驱动它们旋转。螺母和钻体之间还设有 轴承 95和垫圈 96。 所述扭力传递柱 12的外表面与电机轴 7配合连接，所述扭力传递柱 12与电 机轴孔 11之间具有供电机轴插入的环形空间 17。 所述扭力传递柱呈台阶状， 其 一端， 即扭力传递柱在图 2中的上部分为扭力输入部分 121呈六棱柱形，其另一 端， 即扭力传递柱在图 2中的下部分为扭力输出部分 122呈圆柱形， 扭力输出部 分较扭力输入部分粗粗， 所述钻体在电机轴孔的内侧设有与扭力传递柱连接的、 输入扭力的定位孔 15， 定位孔 15与扭力传递柱的扭力输出部分 122过盈配合连 接。 在本发明中，所述电机轴可以是电机本身自带的输出轴， 也可以是能够向钻 夹头输出电机动力的连接在电机上的轴件。In this embodiment, a limiting cover plate 7 of the ring is disposed at a rear end of the rear sleeve, and a support step 24 of the limiting cover plate is disposed in the rear sleeve. The collar 93 connected to the drill body is pressed against the limit cover 7 to define a rear sleeve from the rear portion, and the step on the drill body defines a rear sleeve from the front portion, so that the rear sleeve cannot slide back and forth relative to the drill body, on the drill body The plane 14 prevents the back sleeve from rotating relative to the drill body. The ring 5 is axially positioned by the limiting cover 7 and the support plate 22. In this embodiment, the hand-tight drill chuck is taken as an example, the reference numeral 94 is a nut, the reference numeral 91 is a jaw 91, and the nut is two halves. The structure is mounted in a nut slot in the middle of the drill body. The front sleeve 92 is connected to the two halves of the nut to combine them into a complete nut and drive them to rotate. A bearing 95 and a washer 96 are also provided between the nut and the drill body. The outer surface of the torque transmitting column 12 is coupled with the motor shaft 7, and the torque transmitting column 12 is electrically connected. An annular space 17 into which the power supply shaft is inserted is provided between the crankshaft holes 11. The torsion transmission column is stepped, and one end thereof, that is, the torsion transmission column is a hexagonal prism shape in the upper part of FIG. 2, and the other end, that is, the torsion transmission column is a torsion force in the lower part of FIG. The output portion 122 has a cylindrical shape, and the torque output portion is thicker than the torque input portion. The drill body is provided with a positioning hole 15 for inputting a torsion force connected to the torque transmission column on the inner side of the motor shaft hole, the positioning hole 15 and the torque transmission column. The torque output portion 122 is connected by an interference fit. In the present invention, the motor shaft may be an output shaft that is self-contained by the motor itself, or may be a shaft member that is connected to the motor that can output motor power to the drill chuck.
所述电机轴 4包括处于一端的扭力输入部分 43和处于另一端的扭力输出部 分 44， 其扭力输出部分的外表面与电机轴孔 11相配， 扭力输出部分中设有与扭 力传递柱 12的扭力输入部分相配的连接孔 42。 在扭力输出部分 44和扭力输入 部分 43之间设有限位环 45。 在电机轴的处于电机轴孔 11中的部分中还设有与 所述限位部件 8配合的限位槽 41。 实施例 2， 参照图 8- 13b The motor shaft 4 includes a torque input portion 43 at one end and a torque output portion 44 at the other end. The outer surface of the torque output portion is matched with the motor shaft hole 11, and the torque output portion is provided with the torque of the torque transmitting column 12. A portion of the matching connection hole 42 is input. A limit ring 45 is provided between the torque output portion 44 and the torque input portion 43. A limiting groove 41 that cooperates with the limiting member 8 is also provided in a portion of the motor shaft that is in the motor shaft hole 11. Embodiment 2, refer to Figure 8- 13b
参照附图。 本实用新型包括钻体 210， 自钻体的后端向钻体内延伸设有轴向 的电机轴孔 215， 钻体的后部还设有限位孔 212， 限位孔中设有针对电机轴的可 活动的限位部件。所述限位部件包括分别处于两端的钢珠 251以及处于中间的顶 柱 252， 这样， 能够减小电机轴退出时的阻力。 Refer to the attached drawings. The utility model comprises a drill body 210. The rear end of the drill body extends into the drill body and is provided with an axial motor shaft hole 215. The rear part of the drill body is further provided with a limit hole 212, and the limit hole is provided with a motor shaft. Removable limit parts. The limiting member includes a steel ball 251 at both ends and a top column 252 at the center, so that the resistance when the motor shaft is withdrawn can be reduced.
钻体的后部还设有定位部件， 所述定位部件为钢珠 254， 它设置在钻体后部 的定位孔 213中， 由弹簧 253支撑。 The rear portion of the drill body is further provided with a positioning member which is a steel ball 254 which is disposed in the positioning hole 213 at the rear of the drill body and supported by the spring 253.
所述钻夹头在钻体的后部设有可转动的控制套，在本实施例中采用钻夹头的 后套 240作为控制套， 后套被卡圈 260定位在钻体后部的表面， 附图标号 214 为钻体后端与卡圈配合的槽。 The drill chuck is provided with a rotatable control sleeve at the rear of the drill body. In the present embodiment, the rear sleeve 240 of the drill chuck is used as a control sleeve, and the rear sleeve is positioned by the collar 260 on the surface of the rear portion of the drill body. Reference numeral 214 is a groove in which the rear end of the drill body cooperates with the collar.
所述控制套内壁设有与定位部件钢珠 254配合的定位凹槽 242和 2421， 定 位凹槽 242为对应电机轴被轴向锁定时的定位凹槽，定位凹槽 421为对应电机轴 脱出时的定位凹槽。控制套内壁还设有与所述限位部件配合而使其前进和供其后 退的结构，所述结构为供限位部件后退时的让位凹槽 241和嵌在后套内壁的将限 位部件向电机轴的方向顶的嵌件 249。 所述后套内壁设有后套转动限位键 243， 钻体后部设有与限位键配合的转位透空槽 216。通过限位键 243与转位透空槽 216 端壁的配合， 起到后套转动限位和提示后套转动到位的作用。The inner wall of the control sleeve is provided with positioning grooves 242 and 2421 which cooperate with the positioning member steel balls 254, The position groove 242 is a positioning groove corresponding to when the motor shaft is axially locked, and the positioning groove 421 is a positioning groove corresponding to when the motor shaft is disengaged. The inner wall of the control sleeve is further provided with a structure that cooperates with the limiting member to advance and retreat, and the structure is a retaining groove 241 when the limiting member is retracted and a limit position embedded in the inner wall of the rear sleeve. The insert 249 of the component in the direction of the motor shaft. The inner wall of the rear sleeve is provided with a rear sleeve rotation limit button 243, and the rear portion of the drill body is provided with an indexing through-hole 216 matched with the limit button. By the cooperation of the limit button 243 and the end wall of the indexing through-hole 216, the rotation of the back sleeve is limited and the sleeve is rotated into position.
所述电机轴孔中沿电机轴孔 215 的轴向设有能与电机轴连接的扭力传递柱 230。 所述扭力传递柱的外表面与电机轴 270配合连接， 所述扭力传递柱 230与 电机轴连接孔之间具有供电机轴插入的环形空间 217。 所述扭力传递柱呈台阶 状， 其上部 231为扭力输入部分呈六棱柱形， 其下部为扭力输出部分呈圆柱形， 所述下部较上部粗，所述钻体在电机轴孔的内侧设有与扭力传递柱连接的、输入 扭力的定位孔 211， 定位孔 211与扭力传递柱的扭力输出部分过盈配合连接。 A torque transmitting column 230 connectable to the motor shaft is disposed in the motor shaft hole along the axial direction of the motor shaft hole 215. The outer surface of the torque transmitting column is coupled to the motor shaft 270. The torsion transmitting column 230 and the motor shaft connecting hole have an annular space 217 into which the power supply shaft is inserted. The torsion transmission column has a stepped shape, and the upper portion 231 has a hexagonal prism shape for the torsion input portion, a lower portion of the torsion output portion has a cylindrical shape, and the lower portion is thicker than the upper portion, and the drill body is disposed at the inner side of the motor shaft hole. a positioning hole 211 for inputting a torque coupled to the torque transmitting column, and the positioning hole 211 is connected to the torque output portion of the torque transmitting column by an interference fit.
本实施例以手紧钻夹头为例， 附图标号 220为操作钻夹头螺母的外套， 附图 标号 291为螺母， 附图标号 292为螺母的限位圈， 附图标号 293为装在钻体前端 的端帽， 附图标号 294为夹爪， 附图标号 281为螺母后方的轴承钢珠， 附图标号 282圈件， 圈件 282设有参与自锁配合的弹簧片 283， 螺母的表面具有与弹簧片 进行自锁配合带动的齿圈 295。 In this embodiment, a hand-tight drill chuck is taken as an example. Reference numeral 220 is an outer casing for operating a drill chuck nut, reference numeral 291 is a nut, reference numeral 292 is a limit ring of a nut, and reference numeral 293 is mounted on a drill. The end cap of the body front end, reference numeral 294 is a jaw, the reference numeral 281 is a bearing steel ball behind the nut, the reference numeral 282 is a ring member, and the ring member 282 is provided with a spring piece 283 which participates in a self-locking fit, the surface of the nut has The ring gear 295 is driven by a self-locking engagement with the spring piece.
本实用新型所提供的电机轴 270 设有与所述限位部件配合的限位凹槽 271 以及与所述扭力传递柱连接的构型 272。所述电机轴设有与钻夹头的后端配合的 限位环 273， 以防止过度插入而损坏电机轴和钻夹头内部结构。 在本实施例中所 述构型 272为与扭力输入部分 231及环形空间 217配合的外部为圆柱内部为六方 孔的连接头。 The motor shaft 270 provided by the present invention is provided with a limiting groove 271 that cooperates with the limiting member and a configuration 272 that is coupled to the torque transmitting column. The motor shaft is provided with a retaining ring 273 that cooperates with the rear end of the drill chuck to prevent excessive insertion and damage to the motor shaft and the internal structure of the drill chuck. The configuration 272 in this embodiment is a connector that cooperates with the torque input portion 231 and the annular space 217 and has a hexagonal hole inside the cylinder.
在本实用新型中，所述电机轴包括电机本身自带的输出轴以及能够向钻夹头 输出电机动力的连接在电机上的轴件。 In the present invention, the motor shaft includes an output shaft that is self-contained by the motor itself, and a shaft member that is coupled to the motor that can output motor power to the drill chuck.
当需要将钻夹头安装到电机轴上时，转动后套， 使钢珠 254在弹簧的作用下 落入定位槽 421中， 此时， 外端的钢珠 251对准退位凹槽 241， 将钻夹头插入电 机轴， 构型 272插入环形空间 217中与扭力传递柱连接， 形成传递扭力配合， 然 后转动后套直至限位键 243碰到转位透空槽 216 的壁， 受后套内表面嵌件 249 的作用， 内端的钢珠 251被推入电机轴的限位凹槽 271中， 此时， 钢珠 254落入 定位槽 242中确保后套所处位置的稳定，从而快速方便地完成钻夹头于电机轴的 连接操作。 当需将钻夹头从电机轴上拆卸时， 反向转动控制套直至限位键 243 碰到转位透空槽 216的另一端的壁，此时，钢珠 254在弹簧的作用下落入定位槽 421中， 外端的钢珠 251对准退位凹槽 241， 当拔出钻夹头时， 内端的钢珠 251 受挤压， 顶柱 252、 外端的钢珠 251依次而行， 外端的钢珠 251 自动退入退位凹 槽 241， 从而使得钻夹头被快速方便地从电机轴上拆卸。When the drill chuck needs to be mounted on the motor shaft, the rear sleeve is rotated, so that the steel ball 254 falls into the positioning groove 421 under the action of the spring. At this time, the outer steel ball 251 is aligned with the retreating groove 241, and the drill chuck is inserted. Electricity The crankshaft, the configuration 272 is inserted into the annular space 217 to be coupled with the torsion transmission column to form a transmission torque fit, and then the rear sleeve is rotated until the limit key 243 hits the wall of the indexing through slot 216, and the rear cover inner surface insert 249 The inner end of the steel ball 251 is pushed into the limiting groove 271 of the motor shaft. At this time, the steel ball 254 falls into the positioning groove 242 to ensure the stability of the position of the rear sleeve, thereby completing the drilling chuck to the motor quickly and conveniently. The connection operation of the shaft. When the drill chuck needs to be detached from the motor shaft, the control sleeve is reversely rotated until the limit button 243 hits the wall of the other end of the indexing vent 216. At this time, the steel ball 254 falls into the positioning groove by the action of the spring. In 421, the outer end of the steel ball 251 is aligned with the retreating groove 241. When the drill chuck is pulled out, the inner end of the steel ball 251 is pressed, the top post 252, the outer end of the steel ball 251 are sequentially followed, and the outer end of the steel ball 251 is automatically retracted into the ablation position. The groove 241 allows the drill chuck to be quickly and easily detached from the motor shaft.