WO2002092289A1

WO2002092289A1 - Electric impact wrench

Info

Publication number: WO2002092289A1
Application number: PCT/CN2001/000890
Authority: WO
Inventors: Houxiang Lai; Houxuan Lai; Yubin Xiao; Ronghua Hu
Original assignee: Houxiang Lai
Priority date: 2001-05-14
Filing date: 2001-06-04
Publication date: 2002-11-21
Also published as: CN1385282A; CN1234504C

Abstract

The present invention relates to an electric tool, especially to an electric wrench. The electric wrench includes a shell (16), a DC motor (14) controlled by a switch unit (23) and having its shaft coupling to a flywheel shaft (17) through a clutch (9), which clutch is set in a protecting case (11) and can slide on the said shaft (17) axially, on the flywheel shaft (17), there are a spring (10) worn on and a flywheel (5) with a ratchet slot in which a ratchet block is mounted, a stop pin (8) having one end connecting to the clutch (9) and the other end being inserted into the lower portion of the ratchet block (6) of the flywheel (5), a spindle (4) mounted in a sleeve and a bearing, which one end as a connection end extends out of the front end surface of the shell (16) while the other end provides with a ratchet tooth (30) which is mounted in the flywheel (5) and has same axial position with the ratchet block (6). Compared to a conventional electric wrench, the present invention is bigger in impact moment, smaller in volume, convenient in application and lower in work intensity.

Description

电动冲击扳手 Electric impact wrench

本发明涉及电动工具，具体是指一种电动扳手。现有技术中，用于螺杆、螺帽旋紧或旋松的电动工具扳手 ί 能起到相关作用，但存在的缺陷包括：均为交流电源驱动，在无交流电源的情况下无法使用；功率较小，难以达到一定的紧固要求，对于 12 厘米以上的螺栓无法紧固且对生锈已久的螺栓无法松开；劳动强度大，惯性与甩力大，不便操作。 The present invention relates to an electric tool, and particularly to an electric wrench. In the prior art, a power tool wrench for screwing or loosening a screw or nut can play a related role, but the disadvantages include: both are driven by AC power and cannot be used without AC power; power It is small and difficult to meet certain tightening requirements. It cannot be tightened for bolts larger than 12 cm and cannot be loosened for long rusted bolts. It has high labor intensity, large inertia and throwing force, and is inconvenient to operate.

本发明的目的是，提供一种电动冲击扳手，它采用直流工作电源，具有输入功率小（空载功率 10 瓦，满载功率 80瓦）扭矩大、重量轻、操作方便简捷且安全、劳动强度小的特点，适于流动、野外作业（如更换汽车轮胎等），实用性强。 The purpose of the present invention is to provide an electric impact wrench, which adopts a DC working power supply, has a small input power (10 watts of no-load power, 80 watts of full-load power), large torque, light weight, convenient operation, simple and safe, and low labor intensity. Characteristics, suitable for mobile, field operations (such as changing car tires, etc.), strong practicability.

本发明的技术方案是，所述电动冲击扳手有手柄的外壳，手柄底端有电源接线 , 其结构特点是所述外壳后端装有直流电动机，该电动机经电源换向开关同所述电源接线相连接，装有轴承的电动机轴同飞轮一侧的飞轮轴相联接，所述飞轮轴上装有一个置于护罩中并可作轴向滑动的自动离人與该自动离 1=1 有滑套和 2 个或 2 个以上相同形状与大小的扇形块，各扇形块经置于其底部簧槽中的箍簧箍围在滑套圆周上，在飞轮轴上且位于滑套轴孔中装有压力弹簧，飞轮上有沿圆周均匀分布的 1〜6 个棘块槽，各棘块槽中经铰接销和位于棘块中部的铰接孔分别铰接了棘块，各棘块槽两端且位于飞轮轴一侧的飞轮体上分别设有棘块止动销孔，相应的棘块止动销的一端同自动离合器的滑套一端相连接且与所述压力弹簧的簧圈处于相同径向高度所述棘块止动销的另一 ***相应的棘块止动销孔并伸至棘块的弧形端下部，装在轴套中并装有带挡圈之轴承的主轴一端伸出外壳前端且该端为可连接通用筒的连接端，所述主轴的另一端设有沿圆周均匀分布且其个数与所述棘块槽数量相同的棘齿，所述棘齿位于飞轮中并与所述棘块处在相同的轴以下结合附图做出进一步说明。 The technical solution of the present invention is that the electric impact wrench has a handle shell, and a power cord is connected to the bottom end of the handle. The structural feature is that a DC motor is installed at the rear end of the shell, and the motor is connected to the power source through a power reversing switch. The motor shaft with bearings is connected to the flywheel shaft on one side of the flywheel. The flywheel shaft is provided with an automatic separation from the person that can be placed in a shield and can slide axially. And two or more fan-shaped blocks of the same shape and size. Each fan-shaped block is enclosed on the circumference of the sliding sleeve by a hoop hoop placed in the bottom spring groove, and is mounted on the flywheel shaft and in the sliding sleeve shaft hole. There are pressure springs. The flywheel has 1 to 6 ratchet block grooves evenly distributed along the circumference. Each ratchet block groove is hinged to the ratchet block via a hinge pin and a hinge hole located in the middle of the ratchet block. The flywheel body on one side of the flywheel shaft is provided with The ratchet block stop pin hole, one end of the corresponding ratchet block stop pin is connected to one end of the sliding sleeve of the automatic clutch and is at the same radial height as the spring coil of the pressure spring, and the other of the ratchet block stop pin is inserted into the corresponding ratchet. The stop pin hole of the block extends to the lower part of the arcuate end of the ratchet block. One end of the main shaft installed in the sleeve and equipped with a bearing with a retaining ring extends from the front end of the housing and the end is a connecting end that can be connected to a universal cylinder. The other end is provided with ratchet teeth uniformly distributed along the circumference and the number of which is the same as the number of the ratchet block grooves. The ratchet teeth are located in the flywheel and are on the same axis as the ratchet blocks. Instructions.

附图说明： Brief description of the drawings:

图 1 是本发明的整体剖视结构图； FIG. 1 is an overall sectional structural view of the present invention;

图 2是外壳中各构件呈分离状态的立体结构图；图 3是自动离合器构件为分离状态的立体结构；图 4是所述扇形块的正视结构； Fig. 2 is a perspective structural view of each component in the housing in a separated state; Fig. 3 is a perspective structural view of an automatic clutch member in a separated state; Fig. 4 is a front view structure of the sector block;

图 5是图 4中 A-A剖视结构； Fig. 5 is a cross-sectional structure taken along A-A in Fig. 4;

图 6是棘块的实施例主视结构； 6 is a front view structure of an embodiment of a ratchet block;

图 7是图 6中 B-B向剖视结构； 7 is a cross-sectional view taken along the line B-B in FIG. 6;

图 8是飞轮的正视结构图； FIG. 8 is a front structural diagram of a flywheel; FIG.

图 9是图 8中 C-C向剖视结构图； Fig. 9 is a sectional structural view taken along the line C-C in Fig. 8;

图 10是图 9中 D-D向剖视结构图； Fig. 10 is a sectional structural view taken along the D-D direction in Fig. 9;

图 1 1是主轴的正视结构图； Figure 11 is a front view structural view of the main shaft;

图 12是图 1 1所示构件的 E向视图； FIG. 12 is an E-view of the component shown in FIG. 11;

图 13是电路连接原理图。 Figure 13 is a circuit connection schematic.

在所述附图中： 1-轴套， 6-棘块， In said drawings: 1-shaft sleeve, 6-thorn block,

2-挡圈， 7-铰接销 2-retaining ring, 7-hinge pin

3-轴承， 8-棘块止动销， 3-bearing, 8-ratchet stop pin,

4-主轴， 9-自动离合器， 4-spindle, 9-automatic clutch,

5-飞轮， 10-压力弹簧， 5-flywheel, 10-pressure spring,

11-护罩， 25-铰接孔， 11-shield, 25-hinged holes,

12-卡簧， 26-棘块止动销孔， 12-circle spring, 26-ratchet stop pin hole,

13-轴承， 27-铰接孔， 13-bearing, 27-hinge hole,

14-直流电动机， 28-卡簧槽， 14-DC motor, 28-circle slot,

15-电动机轴， 29-连接端， 15-motor shaft, 29-connecting end,

16-外壳， 30-棘齿， 16-shell, 30-ratchet,

17-飞轮轴 18-滑套， 17-flywheel shaft 18-slip sleeve,

19-箍簧， 20-扇形块， 19-hoop spring, 20-sector block,

21-手柄， 22-电源接线， 21-handle, 22-power wiring,

23-电源换向开关， 24-簧槽， 23-Power reversing switch, 24-reed slot,

由图 1 和图 2 可知，本发明有带手柄（21) 的外壳（ 16)，手柄（21) 底端有电源接线（22); 其设计特点是，所述外壳（6) 后端装有直流电动机（ 14)，该电动机（ 14) 经电源换向开关（23) 同所述电源接线（22) 相连接（电路连接图参见图 15); 所述电源换向开关（23) (已有技术产品）的功能包括接通与切断电源以及变换电源正负极与电动机的连接而实现电动机正转与反转；装有轴承（ 13) 的电动机轴（ 15) 同飞轮（5) —侧的飞轮轴（ 17) 相联接，飞轮轴（ 17) 上装有一个置于护罩（ 11) 中并可作轴向滑动的自动离合器（9); 参见图 3，该自动离合器（9) 有滑套（ 18) 和 2个或 2 个以上（如至多 20个）相同形状与大小的扇形块（20) (图 3中扇形块为三个）；单个扇形块（20) 的一种实施例结构如图 4 和图 5 所示；各扇形块（20) 经置于其底部簧槽（24) (参见图 5)种的箍簧（ 19) (参见图 1、图 3) 箍围在滑套（ 1 8 ) 圆周上，在飞轮轴 ( 1 7 )上且位于滑套（ 18)轴孔中装有压力弹簧（ 10)，飞轮（5) 上有沿圆周均匀分布的 1〜6 个棘块槽（图 2 及图 8 中为 2 个棘块槽），各棘块槽中经图 2 中所示的铰接销（7) 和位于棘块中部的铰接孔（25) (参见图 6) 分别铰接了棘块，各棘块槽两端且位于飞轮轴（ 17) 一侧的飞轮体上分别设有棘块止动销孔（26) (参见图 8)，相应的棘块止动销（ 8) 的一端同自动离合器（9) 的滑套（ 18) —端相连且所述压力弹簧（ 10) 的簧圈体处于图 1 所示的相同径向高度（即所述销（8) ·作轴向移动时可顶及弹簧（ 10) 的顶端簧圈）；而此处所述棘块止动销（8) 的一端同滑套（ 18) —端相连接的连接结构可以是，将销（8) 右端的颈部（参见图 2) 卡入图 3 中滑套（ 18) —端的销槽（29) 中即可；棘块止动销（ 8) 的另一端***相应的棘块止动销孔（26) 中并伸至棘块（ 6) 的弧形端下部，装在轴套（ 1) 中并装有带挡圈（2) 之轴承（3) 的主轴（4) 的一端伸出外壳（ 16) 前端且该端为图 11 所示的可以连接通用套筒的连接端（29) (例如该端为常见的方头），所述主轴（4) 的另一端设有如图 11 和图 12 所示的沿圆周均匀分布且其个数与所述棘块槽数量相同的棘齿As can be seen from FIG. 1 and FIG. 2, the present invention has a housing (16) with a handle (21), and a power connection (22) is provided at the bottom of the handle (21); the design feature is that the rear end of the housing (6) is provided DC motor (14), the motor (14) is connected to the power supply wiring (22) via a power reversing switch (23) (see Figure 15 for the circuit connection diagram); the power reversing switch (23) (already (Technical products) The functions include turning on and off the power supply and changing the connection between the positive and negative poles of the power supply and the motor to achieve forward and reverse rotation of the motor; the motor shaft (15) with bearings (13) is the same as the flywheel (5). The flywheel shaft (17) is connected with the flywheel shaft (17). Clutch (9); see FIG. 3, the automatic clutch (9) has a sliding sleeve (18) and two or more (such as at most 20) sector blocks (20) of the same shape and size (the sector blocks in FIG. 3) Is three); the structure of an embodiment of a single sector block (20) is shown in Figs. 4 and 5; each sector block (20) is placed on its bottom spring groove (24) (see Fig. 5) hoop A spring (19) (see Figures 1 and 3) is hooped around the circumference of the sliding sleeve (18), and a compression spring (10) is installed on the flywheel shaft (17) and located in the shaft hole of the sliding sleeve (18). The flywheel (5) has 1 to 6 ratchet grooves evenly distributed along the circumference (2 ratchet grooves in Figs. 2 and 8), and each of the ratchet grooves passes the hinge pin (7) shown in Fig. 2 And the hinge hole (25) (see Fig. 6) located in the middle of the ratchet block are respectively hinged with the ratchet block, and the flywheel body at both ends of each ratchet block slot and on the flywheel shaft (17) side is provided with a ratchet block pin hole ( 26) (see FIG. 8), one end of the corresponding ratchet stop pin (8) is connected to the sliding sleeve (18) of the automatic clutch (9) at one end and the coil body of the pressure spring (10) is located in FIG. 1. The same radial height shown Degree (that is, the pin (8) can be pushed against the top coil of the spring (10) when it is moved axially); and one end of the ratchet stop pin (8) described here is the same as the sliding sleeve (18) -end The connected connection structure can be as follows: the neck at the right end of the pin (8) (see FIG. 2) can be snapped into the pin groove (29) at the end of the sliding sleeve (18) in FIG. 3; the ratchet stop pin (8) The other end is inserted into the corresponding ratchet block stop pin hole (26) and extends to the lower part of the curved end of the ratchet block (6). It is installed in the shaft sleeve (1) and equipped with a bearing with a retaining ring (2) (3). One end of the main shaft (4) protrudes from the front end of the housing (16) and the end is a connecting end (29) shown in FIG. 11 that can be connected to a universal sleeve (for example, the end is a common square head), and the main shaft ( 4) The other end is provided along the circumference as shown in Figure 11 and Figure 12. Ratchets evenly distributed and having the same number of ratchet grooves

( 30)，所述棘齿（ 30) 位于飞轮（ 5) 中并与所述棘块（6) 处在图 1 所示的相同轴向位置（即棘块（6) 可冲击到所述棘齿）。如图 1 所示，所述护罩（ 11) 可用卡簧（ 12) 定位在飞轮轴（ 17) 上。 (30), the ratchet tooth (30) is located in the flywheel (5) and is in the same axial position as the ratchet block (6) shown in FIG. 1 (that is, the ratchet block (6) can impact the ratchet tooth). As shown in FIG. 1, the shield (11) can be positioned on the flywheel shaft (17) by a snap spring (12).

本发明的设计原理是（参见图 1与图 2)，开关（23) 可将直流电源接通并根据需要变换直流电动机（ 14) 与电源正、负极的连接，从而实现正转或反转；电动机（ 14) 起动前，一端与自动离合器（9) 的滑套（ 18) 相连的棘块止动销（8) 的另一端在弹簧（ 10) 的推力作用下***飞轮（ 5) 的销孔（26) 中，使棘块（ 6) 不能绕铰接销（7) 转动（以销（7) 为轴心两边摆动），此时飞轮（ 5) 随电动机轴（ 15) 转动而主轴（4) 不产生转动；当飞轮（5) 随电动机（ 14) 转速同步增加到一定转速时，随飞轮（5) —同转动的自动离合器（9) 的多个扇形块（20) 就在离心力作用下克服箍簧（ 19) 的箍紧力而自动张开，这种张开一旦产生就使所述离合器（9) 整体产生图 1 中的向右作轴向移动，则棘块止动销（8) 会克服弹簧（ 10) 的作用力而发生向右的轴向移动以从飞轮（5) 的销孔（26) 中退出，使棘块 The design principle of the present invention is (see Fig. 1 and Fig. 2), the switch (23) can turn on the DC power supply and change the connection between the DC motor (14) and the positive and negative poles of the power supply according to needs, thereby achieving forward rotation or reverse rotation; Before the motor (14) starts, the other end of the ratchet stop pin (8) connected to the sliding sleeve (18) of the automatic clutch (9) is inserted into the pin hole of the flywheel (5) under the thrust of the spring (10). 26), so that the ratchet block (6) cannot rotate around the hinge pin (7) (the pin (7) is pivoted on both sides of the shaft), at this time, the flywheel (5) rotates with the motor shaft (15) and the main shaft (4) does not Rotation occurs; when the flywheel (5) increases synchronously with the speed of the motor (14) to a certain speed, the sectors (20) that follow the flywheel (5)-the automatic clutch (9) that rotates overcome the hoop under the action of centrifugal force The hoop force of the spring (19) automatically opens, and once this expansion is generated, the clutch (9) as a whole is moved axially to the right in FIG. 1, and the ratchet stop pin (8) will overcome To the right by the force of the spring (10) Axial movement of the flywheel to exit from the pin hole (5) (26), that the ratchet block

( 6) 失去其约束而在飞轮（ 5) 的旋转过程中冲击所述主轴（4) 的棘齿（30)，使主轴（4) 产生冲击性旋转，其旋转方向与电动机轴的转动方向一致，从而实现电动冲击扳手之功能。当电动机（ 14) 转速下降或停止转动时，止动销（8) 会在弹簧（ 10) 推力作用下并在旋转过程中***所述销孔（ 2 6 )，即复位 o 所述轴套（ 1)、轴承（ 13)、电动机（ 14) 固定安装在外壳(6) Losing its restraint and impacting the ratchet teeth (30) of the main shaft (4) during the rotation of the flywheel (5), causing the main shaft (4) to have an impact rotation, and its rotation direction is consistent with the rotation direction of the motor shaft To achieve the function of an electric impact wrench. When the speed of the motor (14) decreases or stops, the stop pin (8) will be under the thrust of the spring (10) And inserting the pin hole (2 6) during the rotation process, that is, resetting the shaft sleeve (1), the bearing (13), and the motor (14) fixedly installed in the housing

( 16) 中。 (16) Medium.

上述结构及工作原理，使本发明的主轴产生很强的旋转冲击力矩，可旋动较大直径螺栓及生锈已久的螺栓。 The above structure and working principle cause the main shaft of the present invention to generate a strong rotational impact torque, and can rotate a bolt with a large diameter and a bolt that has been rusted for a long time.

由以上可知，本发明为一种电动冲击扳手它采用直流工作电源，因而可利用车载直流电源或小型电池（ 12V7AH 以上）等在无需交流电源条件下进行野外、流动作业，高空作业具有体积小、重里轻、功率大、操作安全方便以及劳动强度小等特点尤其适于随行汽车维修，更换轮胎、高空塔架等作业只要更换前端套筒则成为万能扳手。 As can be seen from the above, the present invention is an electric impact wrench which uses a DC working power source, so it can use a vehicle DC power supply or a small battery (12V7AH or more) to perform field and mobile operations without the need for AC power. Light weight, high power, safe and convenient operation, and low labor intensity are particularly suitable for accompanying car maintenance. Replacement of tires, high-altitude towers and other operations can become universal wrenches by replacing the front sleeve.

实施例：按照附图和上述结构的本发明产品采用直流 12伏电源（直流 24伏、 48伏均可）；外壳（ 16) 为尼龙加 30%纤维成型的对开结构，用 M4 自攻螺钉连接成整体，棘块（6) 及棘齿（30) 均为 2 个，图 1 为实际装置结构。所述轴承（ 13) 和电动机（ 14) 以及轴套（ 1) 固定在外壳（ 16) 中。 Example: The product of the present invention according to the drawings and the above structure adopts a DC 12 volt power supply (24 VDC, 48 volts can be used); the shell (16) is a split structure made of nylon and 30% fiber, and M4 self-tapping screws are used. Connected as a whole, there are two ratchet blocks (6) and ratchet teeth (30). Figure 1 shows the actual device structure. The bearing (13) and the motor (14) and the shaft sleeve (1) are fixed in a housing (16).

Claims

权利要求 Rights request

1、一种电动冲击扳手，有带手柄（ 2 1 ) 的外壳 ( 16)，手柄（ 2 1 ) 底端有电源接线（ 2 2 )，其特征是，所述外壳（ 6 ) 后端装有直流电动机（ 1 4 ) , 它经电源换向幵关（ 2 3 ) 同所述电源接线（ 2 ) 相连接，装有轴承（ 1 3 ) 的电动机轴（ 1 5 ) 同飞轮（5) 一侧的飞轮轴（ 1 7 ) 相联接，飞轮轴（ 1 7 ) 上装有一个置于护罩（ 1 1 ) 中并可作轴向滑动的自动离合器（ 9 ); 该自动离合器（ 9 ) 有滑套（ 18) 和 2 个或 2个以上相同形状与大小的扇形块（ 2 0 )；各扇形块（ 2 0 ) 经置于其底部簧槽（ 2 4 ) 中的箍簧（ 1 9 ) 箍围在滑套（ 1 8 ) 圆周上，在飞轮轴（ 1 7 ) 上且位于滑套（ 1 8 ) 轴孔中装有压力弹簧（ 1 0 )，飞轮（5) 上有沿圆周均匀分布的 1〜6 个棘块槽，各棘块槽中经铰接销（7) 和位于棘块中部的铰接孔（ 2 5 ) 分别铰接了棘块（ 6 )，各棘块槽两端且位于飞轮轴 ( 1 7 ) 一侧的飞轮体上分别设有棘块止动销孔（ 2 6 )，相应的棘块止动销（ 8 )的一端同自动离合器（ 9 ) 的滑套（ 1 8 ) —端相连且与所述压力弹簧（ 1 0 ) 的簧圈体处在相同径向高度，棘块止动销（ 8 ) 的另一端***相应的棘块止动销孔（ 2 6 ) 中并伸至棘块 ( 6 ) 的弧形端下部，装在轴套（ 1 ) 中并装有带挡圈（ 2 ) 之轴承（ 3 ) 的主轴（ 4 ) 的一端伸出外壳 ( 1 6 ) 前端且该端为可连接通用套筒的连接端（ 2 9 )，主轴（ 4 ) 的另一端设有沿圆周均匀分布且其个数与所述棘块槽数量相同的棘齿（ 3 0 )，所述棘齿 ( 3 0 ) 位于飞轮（ 5 ) 中并与所述棘块（ 6 ) 处在相同轴向位置。 1. An electric impact wrench having a housing (16) with a handle (2 1), and a power connection (2 2) at the bottom end of the handle (2 1), characterized in that the rear end of the housing (6) is provided with DC motor (1 4), which is connected to the power supply wiring (2) via the power commutation switch (2 3), and the motor shaft (1 5) equipped with bearings (1 3) is on the same side as the flywheel (5) The flywheel shaft (1 7) is connected, and the flywheel shaft (1 7) is equipped with an automatic clutch (9) placed in the cover (1 1) and capable of axial sliding; the automatic clutch (9) has a sliding sleeve (18) and two or more fan-shaped blocks (20) of the same shape and size; each fan-shaped block (20) is hooped by a hoop spring (19) placed in a spring groove (24) at its bottom. On the circumference of the sliding sleeve (1 8), a pressure spring (1 0) is installed on the flywheel shaft (1 7) and located in the shaft hole of the sliding sleeve (1 8). The flywheel (5) has 1 distributed evenly along the circumference. ~ 6 ratchet block grooves, each of which is hinged to the ratchet block (6) via a hinge pin (7) and a hinge hole (2 5) located in the middle of the ratchet block. A flywheel body on one side of the wheel shaft (17) is provided with ratchet block pin holes (26), one end of the corresponding ratchet block pin (8) is the same as the slide sleeve (18) of the automatic clutch (9). Connected and at the same radial height as the coil body of the pressure spring (1 0), the other end of the ratchet block pin (8) is inserted into the corresponding ratchet block pin (2 6) and extends to the ratchet block The lower part of the arc-shaped end of (6) is installed in the shaft sleeve (1) and is equipped with a bearing (3) with a retaining ring (2). One end of the main shaft (4) protrudes from the front end of the housing (1 6) and the end is The connecting end (2 9) that can be connected to the universal sleeve, and the other end of the main shaft (4) is provided with a uniform distribution along the circumference and its The number of ratchet teeth (30) is the same as the number of the ratchet grooves, and the ratchet teeth (30) are located in the flywheel (5) and at the same axial position as the ratchet blocks (6).