JP3101331U - Compressed air screw tightening machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compressed air screw tightening machine which improves operability by reducing the volume and height of a head portion.
SOLUTION: An air motor driven by compressed air, a cylinder driven by compressed air, a rotary slide member provided in the cylinder and having a piston at one end, and a rotary slide member at one end of the rotary slide member are provided in the head portion. A rotary shaft of the air motor is provided with a rod groove for accommodating the rotary slide member, and an output panel for outputting the power of the rotary shaft of the air motor is provided. Forming a fitting hole having a polygonal cross section, and forming the outer periphery of the rotary slide member into a polygon, fitting the outer peripheral surface of the rotary slide member into the fitting hole to form the rotary slide member. It is provided so as to be slidable, and the rotary slide member is configured to rotate in conjunction with the output panel.
[Selection] Figure 2

Description

  The present invention relates to a screwing machine that uses a compressed air to screw a screw into an object to be fastened, and more particularly to a rotary slide member for sliding and rotating a driver bit of the screwing machine, and a mounting structure thereof.

  A screw tightening machine that performs screw tightening using compressed air uses a high pressure of compressed air to push out a piston rod provided in a head of the screw tightening machine, make a linear motion, and drive an air motor. To generate a rotational movement for screwing the screw into the piston rod. Therefore, when the piston rod in the head is driven, the piston rod can be pushed downward and rotated to perform a screw tightening operation.

  The technique of the compressed air screw tightening machine described above is applied to the technique disclosed in Japanese Patent Application Laid-Open No. H11-300639. The screw tightening machine disclosed in the publication includes a cylinder in a head, a piston portion in the cylinder, a rotary slide portion formed with the piston portion, and components such as an air motor provided above the piston. Comprising. In addition, a sun gear (or a planetary gear) is connected to the rotation shaft of the air motor to reduce the speed and increase the output torque, and to rotate the cylindrical rotator by the action of the sun gear, thereby forming an inner wall of the cylindrical rotator. A rotary slide member having a piston is formed in the cylindrical rotary body so as to be movable in the axial direction, and the rotary slide is rotated.

However, the technology disclosed in the above-mentioned patent has some disadvantages. In particular, in a structure in which a rotary slide member is rotated and moved using a cylindrical rotary body, the cylindrical rotary body requires a relatively long distance to guide. In other words, in the process of moving the rotary slide member downward only when there is a certain guide height, the rotary slide member provided with the rotary slide member is guided by using the uppermost portion to the lower end portion to guide the rotary slide member. Can be rotated to perform the screwing operation. Therefore, the height of the cylindrical rotating body must be slightly longer than the stroke of the rotating slide member. Further, the cylindrical rotating body must be located between the air motor and the cylinder. For this reason, the head portion must be provided with a space for expanding the space and for accommodating the cylindrical rotating body. This increases the weight of the head and affects the operability of the apparatus. This is currently affecting the penetration rate of compressed air screwdrivers, and improvement is awaited.
JP-A-11-300639

  An object of the present invention is to provide a compressed air screw tightening machine capable of reducing the height of a head portion and improving operability.

A compressed air screw tightening machine according to claim 1, wherein an air motor driven by compressed air, a cylinder driven by compressed air, and a rotary slide member provided in the cylinder and having a piston at one end are provided in a head portion. And a driver bit provided at the other end of the rotary slide member to generate linear power for driving a screw into the cylinder under the action of compressed air, and to rotate the screw by driving the air motor. A screw tightening machine configured to generate
On the rotating shaft of the air motor, a rod groove for accommodating the rotating slide member is formed, and an output panel for outputting the power of the rotating shaft of the air motor is provided.
At the center of the output board, a fitting hole having a polygonal cross section is formed, and the outer periphery of the rotary slide member is formed in a polygonal shape, and the outer peripheral surface of the rotary slide member is fitted into the fitting hole. The rotary slide member is slidably provided, and the rotary slide member is configured to rotate in conjunction with the output panel.

According to a second aspect of the present invention, there is provided a compressed air screw tightening machine, wherein a sun gear set is provided between the rotation shaft of the air motor according to the first aspect and the output panel, and rotational power is transmitted through the sun gear set.

According to a third aspect of the present invention, the sun gear set according to the second aspect includes a main gear provided at one end of a rotation shaft of the air motor and a plurality of subordinate gears provided on a surface of the output panel. In addition, the plurality of subordinate gears rotate along the outer periphery of the main gear, and are configured to transmit rotational power to the output panel in conjunction with the main gear.

According to a fourth aspect of the present invention, there is provided a compressed air screw tightener, wherein the output panel according to the second aspect is rotatably provided on a bearing seat.

According to a fifth aspect of the present invention, there is provided a compressed air screw tightening machine, wherein a sleeve having a similar shape is provided in the fitting hole according to the first aspect, and the rotary slide member is fitted to the sleeve and slidably provided. .

  The compressed air screwdriver of the present invention has the advantage that the volume and height of the head portion are efficiently reduced, and the operability of the screwdriver is improved.

The present invention provides a screw tightening machine that performs screw tightening using compressed air, and in particular, provides a rotary slide member for sliding and rotating a driver bit, and a mounting structure thereof. That is, an air motor driven by compressed air, a cylinder driven by compressed air, a rotary slide member provided in the cylinder and having a piston at one end, and a rotary slide member provided at one end of the rotary slide member are provided in the head portion. A driver bit, a rotary shaft of the air motor is formed with a rod groove for accommodating the rotary slide member, and an output panel for outputting the power of the rotary shaft of the air motor is provided, and at the center of the output panel, A cross section is formed with a fitting hole having a polygonal shape, and the outer periphery of the rotating slide member is formed in a polygonal shape, and the outer peripheral surface of the rotating slide member is fitted into the fitting hole to slide the rotating slide member. The rotary slide member is freely provided and configured to rotate in conjunction with the output panel.
In order to explain the structure and features of the compressed air screw tightening machine having such a configuration, a specific embodiment will be described below with reference to the drawings.

  FIG. 1 discloses the appearance of the screw tightening machine according to the present invention. According to the drawing, the screwing machine comprises a body (1), a head part (11), a grip part (12), and between the grip part (12) and the head part (11). , A trigger (16). FIG. 2 is a cross-sectional view showing a mounting structure of a rotary slide member (6) provided on a head portion (11) of the screwing machine. As shown in the drawing, an air motor (2) and a sun gear set are disclosed. (3), an output panel (4), a cylinder (5), a rotary slide member (6) and the like.

A rotary shaft (27) is provided on the air motor (2), and a rod groove (28) is formed at the center of the rotary shaft (27). Further, on the air motor (2), a plurality of blades (29) provided radially and a blade storage groove (24) for storing the plurality of blades (29) are formed.

An intake chamber (22) is formed in the base plate (21) below the air motor (2) (see FIG. 4), and an intake port (23) is formed on one side surface of the intake chamber (22). Further, the suction chamber (22) communicates with a blade pressure increasing port (25) formed at the bottom of the blade housing groove (24) of the air motor (2). An exhaust port (26) is formed on one side of the air motor (2). The exhaust port (26) communicates with the exhaust passage (14), and the exhaust passage (14) communicates with the outside through the inside of the grip portion (12) of the body (1), as shown in FIG. The air motor (2) receives the high-pressure operation of the compressed air (92) in the body (1) and generates power energy for rotation.

The sun gear set (3) includes a main gear (31) and a plurality of subordinate gears (32) (see FIG. 3). The main gear (31) is provided at one end of the rotation shaft (27) of the air motor (2), and the plurality of subordinate gears (32) rotate around the outer periphery of the main gear (31) by receiving the rotation of the sun gear (31). I do.

The output panel (4) extends downward to form a neck (41). The neck portion (41) is rotatably provided in the bearing seat (44). In addition, a fitting hole (42) having a polygonal cross section is formed at the center of the output panel (4), as disclosed in FIG. A sleeve (43) having a similar shape is provided in the fitting hole (42), and a rotary slide member (6) having a polygonal cross section is slidably provided in the sleeve (43). A plurality of support shafts (45) are rotatably provided on the board surface of the output board (4). The other end of the support shaft (45) is rotatably provided on a dependent gear (32) (see FIG. 2) of the sun gear set (3). Therefore, the output board (4) rotates by receiving the rotation of the sun gear set (3), and rotates the rotary slide member (6).

In the output panel (4), the rotary slide member (6) whose outer periphery is directly formed in a polygonal shape by the fitting hole (42) is rotated without providing the sleeve (43), and the fitting hole (42) is provided. (42) may be slid.

The outer periphery of the rotary slide member (6) is formed in a polygonal shape, one end of which is slidably provided in a rod groove (28) of the air motor (2), and the other end of which forms a piston (61). The piston (61) is slidably provided in the cylinder (5), and a driver bit (62) is fitted to the bottom end of the piston (61). At one end of the driver bit (62), a cross portion (63) that bites into the cross groove of the screw (9) is formed (see FIG. 2). Therefore, when the rotary slide member (6) operates under the high pressure of the compressed air (92) in the cylinder (5), linear kinetic energy for sending out the screw (9) is generated.

As described above, the rotating slide member (6) and the fitting hole (42) or the rotating slide member (6) and the sleeve (43), which are fitted and interlocked, form an outer peripheral surface or a hole in a polygonal shape. . In this case, any one of a triangle, a quadrangle, a hexagon, and other polygons may be used, and they are engaged with each other by fitting to achieve a sliding and rotating motion.

With the structure described above, when the trigger (16) is not pressed (see FIG. 2), the rotary slide member (6) is housed in the rod groove (28) formed on the rotary shaft of the air motor (2). When the trigger (16) is pressed (see FIG. 6), the compressed air (92) in the body (1) reaches the inside of the air motor (2) and rotates the plurality of blades (29) (see FIG. 3). Therefore, the rotation shaft (27) of the air motor (2) rotates to output power. In this case, the rotational speed is increased by the action of the sun gear set (3), the rotational torque is increased, and power for performing a stable rotational motion is generated on the output panel (4), and the rotary slide member (6) rotates.

As described above, at the same time that the trigger (16) is pressed (see FIG. 6), the high-pressure compressed air (92) in the body (1) enters the cylinder (5), and the bottom of the rotary slide member (6). A linear motion is generated that presses downward on the piston (61) provided at the end, and the rotating rotary slide member (6) simultaneously moves into the fitting hole (42). For this reason, the operation | movement which presses down simultaneously while rotating the screw (9) can be performed.

As described above, in the present invention, before the trigger (16) is pressed, the rotary slide member (6) is housed in the air motor (2). Therefore, the distance between the cylinder (5) and the air motor (2) can be reduced reliably and efficiently. Moreover, since the output panel (4) is configured to rotate the rotary slide member (6), the space can be significantly reduced. Therefore, the structure for rotating and sliding the rotary slide member (6) can greatly reduce the volume occupied in the head portion (11) and the height thereof.

The above is a preferred embodiment of the present invention, and does not limit the scope of implementation of the present invention. Therefore, any modification or change that can be made by those skilled in the art, which is made in the spirit of the present invention and has an equivalent effect on the present invention, belongs to the claims of the present invention. Shall be.

FIG. 4 is a perspective view of the screw tightening machine according to the present invention. FIG. 2 is a partial cross-sectional view illustrating a head part structure of the screwing machine disclosed in FIG. 1. FIG. 3 is a sectional view taken along line 3a-3a in FIG. FIG. 4 is a sectional view taken along line 4a-4a in FIG. FIG. 5 is a sectional view taken along line 5a-5a in FIG. FIG. 3 is an explanatory diagram illustrating an operation of the screw tightening machine disclosed in FIG. 2.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 1 Body 11 Head part 12 Grip part 14 Exhaust passage 16 Trigger 2 Air motor 21 Base plate 22 Intake chamber 23 Intake port 24 Blade storage groove 25 Blade pressure increase port 26 Exhaust port 27 Rotating shaft 28 Rod groove 29 Blade 3 Sun gear set 31 Main gear 32 Dependent Gear 4 Output Board 41 Neck 42 Fitting Hole 43 Sleeve 44 Bearing Seat 45 Support Shaft 5 Cylinder 6 Rotating Slide Member 61 Piston 62 Driver Bit 63 Cross Section 9 Screw 92 Compressed Air

Claims (5)

An air motor driven by compressed air, a cylinder driven by compressed air, a rotary slide member provided in the cylinder and having a piston at one end, and a driver bit provided at the other end of the rotary slide member in the head portion A screw tightening machine configured to generate linear power for driving a screw into the cylinder under the action of compressed air and generate power for rotating the screw by driving the air motor. ,
On the rotating shaft of the air motor, a rod groove for accommodating the rotating slide member is formed, and an output panel for outputting the power of the rotating shaft of the air motor is provided.
At the center of the output board, a fitting hole having a polygonal cross section is formed, and the outer periphery of the rotary slide member is formed in a polygonal shape, and the outer peripheral surface of the rotary slide member is fitted into the fitting hole. A compressed air screw tightening machine, wherein the rotary slide member is slidably provided, and the rotary slide member is configured to rotate in conjunction with the output panel. The compressed air screw tightening machine according to claim 1, wherein a sun gear set is provided between the rotation shaft of the air motor and the output panel, and rotational power is transmitted through the sun gear set. The sun gear set includes a main gear provided at one end of a rotation shaft of the air motor, and a plurality of subordinate gears provided on a surface of the output panel, and the plurality of subordinate gears extend along an outer periphery of the main gear. The compressed air screw tightening machine according to claim 2, wherein the compressed air screw tightening machine is configured to rotate and transmit rotational power to the output panel in conjunction with the main gear. The compressed air screwdriver according to claim 2, wherein the output panel is rotatably provided on a bearing seat. The compressed air screwdriver according to claim 1, wherein a sleeve having a similar shape is provided in the fitting hole, and the rotary slide member is fitted to the sleeve and slidably provided. .

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