TWM444913U - Automatic driver motor accelerator - Google Patents

Description

Automatic screwdriver motor accelerator

This creation is to improve the structure of the air motor, especially on the one hand, it can improve its speed and torque without changing the original volume, in order to achieve better working efficiency, on the other hand, it can achieve a small current. An automatic screwdriver motor accelerator that activates the auxiliary brake function.

Press, usually a screw is attached, which generally includes the following four steps: 1. setting the position of the lock screw; 2. rotating the screw to move the screw in the direction of the rotating shaft; 3. rotating to the screw head and contacting the locked object , begins to generate tensile stress; 4, the screw head and the locked object complete a certain tensile stress and stop rotating.

Please refer to the figure in the first figure, according to the step of locking the screw, showing the action diagram of the fully automatic power screwdriver locking screw; in which P1 starts to idling, the power driver accelerates from zero to P2 full speed, decelerates to P3, and finally When it stops at P4, the power driver has a speed reduction gear and a clutch mechanism. When the power starter stops, the motor does not stop completely, and it stops completely at P5; this action is converted into a relationship between the motor speed and time, as shown in the figure. Figure 2: Assume that the mass of the motor rotor is M, the radius is r, the length is H, the rotational speed is ω1, ω2, ω3, ω4 respectively correspond to P1, P2, P3, P4; its moment of inertia is I=Mr ² /2 The angular momentum is L = Iω (1, 2, 3, 4), the rotational kinetic energy is T = 1/2 [Iω ² (1, ² , 3, 4)]; in mechanics (1) the fixed axis of the inertial space (2) Through the axis of rotation of the centroid, the moment is equal to the rate of change of angular momentum, so the generated torque is τ=T(ω3-ω4)d/dt(3-4), which generates torque to the power driver, therefore, P3 The greater the slope of -P4, the greater the torque generated. The rotation diagram of the motor of the second figure shows that the motor can be changed without changing the internal design of the motor. And power, will give the maximum torque, the method comprising: reducing the area of the P3-P4, and the increase of rotor speed increase I (moment of inertia), to increase the mass of the rotor or rotor radius increases.

In addition, as shown in the third figure, the load diagram of the general lock wire is locked using a fixed torque value; for the screw, there is no load at the beginning (small neglect), and then the screw contact of the screw is caused by frictional resistance. For a little load, this process occurs in the idle stroke of the screw. After the surface of the screw head is contacted by the screw, the load is quickly raised to a fixed torque stop.

As shown in the fourth figure, the time of the general automatic tool from static to fixed no-load torque is usually short.

In addition, the general automatic screwdriver usually needs a large supply current when starting up, so as to smoothly start the high-speed operation of the motor, and each time the screw is locked, it must be restarted, so it consumes more power.

The above-mentioned fully automatic power driver has no major problems in its use, and it can still meet the requirements of simple locking of general users. However, in consideration of the need to continue to exist in the market, it is necessary to continuously develop and refine existing products. The creator feels this, but he actively thinks about it and starts researching. Under the self-expectation and continuous efforts and trials, he finally develops and designs this more sophisticated and practical creation.

The main purpose of this creation is to provide an automatic screwdriver motor accelerator that can increase the torque output of the motor and increase the rotor mass or increase the rotor radius to increase the rotational speed and moment of inertia of the rotor, thereby achieving a large performance increase and an increase in work efficiency.

Another object of the present invention is to provide an automatic screwdriver motor accelerator which can directly provide a good heat dissipation effect of the rotor by an accelerator device made of a metal material.

A further object of the present invention is to provide an automatic screwdriver motor accelerator by means of the accelerator The device is also equipped with a spring design to make the starting current of the automatic screwdriver smaller, and has a slow start function, and at the same time, it can provide auxiliary braking effect when stopping.

In order to achieve the above objectives, the technical means adopted in the design of this case is to add an accelerator device to the motor mechanism of the general automatic screwdriver without changing the internal design and power of the motor. With the change of the rotational speed, and the motor mechanism (rotor) to make different proportions of the moment of inertia adjustment, the output horsepower becomes larger and can achieve the best performance goal of improving the torque; the automatic screwdriver consists of: motor mechanism, gear mechanism, torque The mechanism, the chuck mechanism, the trigger mechanism, the electronic mechanism and the like constitute a unit, in particular: the motor mechanism is combined with an accelerator device, the accelerator device comprising a bearing (or sleeve) or more than one bearing (or sleeve) connected to each other ), this combination can increase the motor (rotor) mass and (rotor) radius, and increase the speed and moment of inertia to achieve the effect of improving the torque of the motor.

Further, the accelerator device is made of any one of metal aluminum, copper, iron, and steel, and can directly dissipate heat generated during operation of the motor (rotor).

Further, the accelerator device further includes a coupling member between the mandrel and the bearing (or sleeve) that is coupled to the motor mechanism.

Further, the automatic driver can be of the electric or pneumatic type.

Further, the automatic driver can be in the form of an upright or a gun.

In order to enable the review committee to further understand the structural features and functions of the creation, the following preferred embodiments are described in detail with the drawings:

Please refer to the fifth figure for the automatic screwdriver exploded view of the created automatic screwdriver motor accelerator. The automatic screwdriver can be of the current electric or pneumatic type, and can be a common straight. In the vertical or gun form, a gun-shaped pneumatic screwdriver is taken as an example for illustration.

The pneumatic screwdriver (1) comprises a set of matching casings (10), and the internal composition comprises at least a motor mechanism (2), a gear mechanism (3), a clutch mechanism (4), and a collet mechanism (5). a trigger mechanism (6) and an electronic mechanism (7); wherein the motor mechanism (2) has a mandrel (20) for providing power output, and a transmission member is fixed after wearing a fixed plate (21) (22), the transmission member (22) is engaged with a transmission gear mechanism (3); the gear mechanism (3) is a plurality of gears (31) engaging the toothed disc (32) to form a planetary gear type, and is provided with a The gear cylinder (33) is sleeved to facilitate the transmission and shifting of the power; the torsion mechanism (4) has a cam shaft (41) coaxially coupled with the transmission member (22), and one end of the shaft portion is sleeved The upper clutch group (42) is composed of a ring-shaped steel ball (421), a steel ball fixing plate (422), a steel ball fixing cover (423), a stopper (424) and a bearing (425), and the other end of the cam shaft (41) a lower clutch set (43) is provided, comprising an upper disc (431), a steel ball (432) rolling upper disc (431) surface, a lower disc (433), a steel ball (434), and a shaft (44), And the upper sleeve is provided with a torsion spring (45), and The cover is covered with a torsion tube (46) of a tubular shape, thereby setting a required torque value; the chuck mechanism (5) comprises a hollow and axially-shaped clamp (51), and the shaft (44) The impact rod (52) at one end and the opposite positioning beads (521) around the impact rod (52) to quickly combine the effects of the various types of the screwdriver head by the forced clamping method, the impact rod (52) is sleeved a pressing spring (522) is provided; the trigger mechanism (6) includes a segment control button (61) and a locking member (62) for preventing the button (61) from being reset; the electronic mechanism (7) includes an electronic board (71), with the function of setting different speeds for different locking objects, and having power supply function with the base (72).

Please refer to the fifth to seventh figures. The improved features of this creation are as follows: The accelerator device (8) designed in this case is the motor mechanism (2) (ie rotor) disposed in the pneumatic screwdriver (1). The position of the mandrel (20), in combination with the motor mechanism (2), the composition comprising one or more bearings (or sleeves) (81) of a certain proportion by weight and made of metal, and the sleeve The motor mechanism (2) is provided on the mandrel (20) for power output to provide a speed reduction utility.

Referring to the eighth figure, when the accelerator device (8) is configured by more than one bearing (or sleeve) (81), it can solve the situation that the starting current is too large and the clutch brake is abnormal. In order to connect the one or more bearings (or sleeves) (81) with a connecting member (82), when the motor mechanism (2) is started, the mandrel (20) will first drive a bearing. (or sleeve) (81), then the bearing (or sleeve) (81) is rotated to push another bearing (or sleeve) (81) to rotate, and then drive the gear mechanism (3), clutch The mechanism (4), etc., makes the automatic starter work. When the lock is completed, when the automatic starter is stopped, due to the tripping action of the clutch mechanism (4), the above action is reversed and the motor mechanism (2) is stopped, and the bearings (or sleeves) are separated at this time. The inertia of the accelerator device (8) is reduced, and the brake of the automatic driver is normal.

Referring to FIG. 9 , the accelerator device ( 8 ) further includes a spring ( 83 ) located at the accelerator device ( 8 ) and the motor mechanism ( 2 ). The mandrel (20) is coupled to the motor mechanism (2) and the accelerator device (8); in practice, when the motor mechanism (2) is activated, the remaining mechanisms are not yet actuated, and the mandrel (20) is rotated to drive The spring (83) is pressed to push the accelerator device (8) to operate, and then the gear mechanism (3), the clutch mechanism (4), etc. are driven to start the automatic starter. Operation. Since the starting process does not need to directly drive all the mechanisms, it only needs a small current for the motor to run without load, and then the spring (83) and the accelerator device (8) act to asymptotically increase the horsepower and speed. In this way, the mechanical slow start effect can be achieved. Similarly, when the automatic starter is stopped, the accelerator device (8) and the spring (83) are reversely actuated to provide the auxiliary brake effect of the motor mechanism (2).

According to the above design, when the automatic screwdriver is used in practice, on the one hand, the mass and radius of the mandrel (20) (rotor) of the motor mechanism (2) can be increased, and the effect of the torque enhancement can be obtained, and on the other hand, the accelerator device ( 8) Made of metal material such as aluminum, copper, iron, steel, etc., can provide direct heat dissipation of heat generated during operation of the motor mechanism (2) (actual test can be cooled by 5~6 °C), especially with electric screwdriver The heat dissipation effect is most obvious. Moreover, the weight selection of the accelerator device (8) and the size of the motor mechanism (2) are preferably coordinated, that is, the larger the motor size, the heavier the weight of the accelerator required, and vice versa, but if the accelerator is too heavy, As a result, the overall weight of the entire pneumatic screwdriver (1) is increased, which is disadvantageous for hand-held and long-time operation. Conversely, if the weight of the accelerator is too light, the torque value is not significantly improved, and the improvement is lost.

As shown in the tenth figure, the pneumatic screwdriver of the present case slows the response of the motor due to the increase of the moment of inertia, and the pneumatic screwdriver has a relatively long time from the stationary to the fixed no-load torque, but the torque is increased. The automatic screwdriver has a slow speed to match the large reduction ratio, and can be combined with a large moment of inertia mechanism. The motor can reach the no-load torque of the automatic screwdriver for a long time and obtain the maximum torque of the automatic screwdriver. When the speed of the automatic screwdriver is fast, the speed reduction is relatively small, and the maximum torque can be optimized with a small moment of inertia mechanism.

As shown in the eleventh figure, in the motor mechanism of the present case, the part of the torque output is increased, and the time for stopping the motor due to the reduction gear mechanism after the pneumatic starter brake is stopped is increased. The torque output of the motor mechanism is the output that increases the maximum torque for the pneumatic screwdriver.

According to the data shown in Fig. 12, the pneumatic screwdriver with the same motor and the same reduction ratio can be used to increase the horsepower and torque when compared with the accelerator in the same test environment. 30%~50% (differs depending on the softness and hardness of the screw lock). In this way, the addition of the accelerator device method in this case can use the accelerator device to obtain the effect of increasing the torsion force without changing the internal motor mechanism of the automatic screwdriver, thereby improving the locking quality and making the automatic screwdriver more on the market. Competitiveness.

In summary, the creation of the "automatic screwdriver motor accelerator" compared with the automatic motor of the conventional automatic tool has a significant improvement in efficiency, and is extremely rich in industrial use value, fully conforming to the keynote of the new patent application. The application is filed.

(1)‧‧‧Pneumatic screwdriver

(10) ‧‧‧Shell

(2) ‧‧ ‧Motor mechanism

(20)‧‧‧ mandrel

(21)‧‧‧ Fixed disk

(22)‧‧‧ Transmission parts

(3)‧‧‧ Gear mechanism

(31)‧‧‧ Gears

(32)‧‧‧ toothed disc

(33)‧‧‧ Gears

(4) ‧ ‧ Torque mechanism

(41)‧‧‧ camshaft

(42) ‧‧‧Upper clutch set

(421)‧‧‧Round steel balls

(422)‧‧‧Steel ball fixing plate

(423)‧‧‧Steel ball fixing cover

(424) ‧‧‧stops

(425) ‧ ‧ bearing

(43)‧‧‧ Lower clutch group

(431)‧‧‧Upper disc

(432)‧‧‧ steel balls

(433)‧‧‧ Lower disc

(434)‧‧‧ steel balls

(44)‧‧‧ shaft

(45)‧‧‧Torque spring

(46)‧‧‧Torque cylinder

(5) ‧ ‧ chuck mechanism

(51)‧‧‧Clamps

(52)‧‧‧ Impact rod

(521)‧‧‧ positioning beads

(522) ‧‧‧ Pressing spring

(6) ‧‧‧Boat mechanism

(61) ‧‧‧ button

(62) ‧ ‧ locks

(7) ‧‧‧Electronic institutions

(71)‧‧‧Electronic board

(72)‧‧‧Base

(8) ‧‧‧Accelerator device

(81)‧‧‧ Bearings (or sleeves)

(82)‧‧‧Connectors

(83) ‧ ‧ spring

The first picture is the action diagram of the fully automatic power driver lock screw.

The second graph is a plot of motor speed versus time for a power driver.

The third figure is the load diagram of the power lock using a fixed torque value lock.

The fourth graph is a plot of torque versus time for a power driver from stationary to fixed no-load.

The fifth figure is an overall exploded view of the automatic screwdriver motor accelerator.

The sixth picture is the overall combination of the automatic screwdriver motor accelerator.

The seventh figure is a cross-sectional view of one of the structural types of the automatic screwdriver motor accelerator of the present invention.

The eighth figure is a cross-sectional view of another structural type of the automatic screwdriver motor accelerator of the present invention.

The ninth drawing is a cross-sectional view of another structural type of the automatic screwdriver motor accelerator of the present invention.

The tenth figure is a comparison of the torque and time between the creation and the general power driver from stationary to fixed no-load.

The eleventh figure is the time and output twist of the original motor and the general power driver to extend the motor stop at rest. Force comparison chart.

The twelfth figure is the power output of the creation of the torque output after adding accelerators of different weights.

(1)‧‧‧Pneumatic screwdriver

(2) ‧‧ ‧Motor mechanism

(3)‧‧‧ Gear mechanism

(4) ‧ ‧ Torque mechanism

(5) ‧ ‧ chuck mechanism

(8) ‧‧‧Accelerator device

(81)‧‧‧ Bearings (or sleeves)

Claims (6)

An automatic screwdriver motor accelerator, comprising: a set of matching shells, the internal composition comprising at least: a motor mechanism, a gear mechanism, a torsion mechanism, a chuck mechanism, a trigger mechanism and an electronic mechanism; wherein: The motor mechanism is provided with an accelerator device that can cooperate with an automatic screwdriver torque and a rotational speed, and the motor device has a bearing (or a sleeve), or one or more bearings (or sleeves) connected to each other. When the motor is started, the belt driver is first rotated, and then the rotation of the gear mechanism and the torque mechanism is driven to make the automatic driver have a small current and a slow start effect. The automatic driver motor accelerator of claim 1, wherein the accelerator device further comprises a spring disposed on the mandrel of the accelerator device and the motor mechanism. The automatic driver motor accelerator of claim 1, wherein the accelerator device is a bearing (or sleeve) type of more than one connection, and further comprises a mandrel and a bearing (or sleeve) provided with a connecting member for connecting the motor mechanism. cylinder). The automatic driver motor accelerator according to claim 1, wherein the accelerator device is made of a metal material and is any one of aluminum, copper, iron, and steel. The automatic driver motor accelerator of claim 1, wherein the automatic driver can be of the electric or pneumatic type. The automatic screwdriver motor accelerator of claim 1, wherein the automatic driver can be an upright or a gun shape.