JPS5973607A - Drive apparatus by means of cylinder - Google Patents

Abstract

PURPOSE:To enable an effective operation of a work machine with a simplified construction that makes the time differential, i.e. speed, due to the difference in the drive power by the reciprocative rotation of an output shaft to be equal by engaging two parallel pistons with the common pinion carried on the output shaft through a rack on a rod, and reciprocatively rotating the output shaft by applying a pneumatic pressure alternately to both the pistons. CONSTITUTION:When a port 11 is opened and the air is forced into from a port 11a, a piston 5a moves to the left to an end of a cylinder 3a to rotate an output shaft 7 by a rack gear 6a provided on a rod 4a of the piston 5a through a pinion gear 8. At the same time, the other rack gear 6b and a piston 5b are moved in opposite directions by the pinion gear 8. When the port 11a is opened and the air is forced into, the output shaft 7 rotates by the same amount in the opposite direction. Therefore, the output shaft 7 is reciprocatively rotated by a desired angle by the reciprocative movement of both the pistons 11a, 11b. By means of an adjusting screw lever 12a, 12b, the stroke, i.e. rotation angle of the output shaft 7, can be changed by the degree of screwing in.

Description

[Detailed description of the invention] The present invention relates to a drive device using a cylinder.

Conventionally, a rack rod was provided at the end of the piston rod of the cylinder.
A binion provided on the output shaft is engaged with the rack teeth, and a reciprocating rotational movement is applied to the output shaft, and this movement causes, for example,
The arm of the welding robot device is given intermittent rotational motion to perform welding according to the welding program, but the air pressure or hydraulic pressure that acts on the front surface of the piston is different from the air pressure that acts on the rear surface of the piston where the rod is located. Because of this weakness, there is a time difference between the forward and backward movements of the output shaft, and it is necessary to take this time difference into consideration when designing the equipment, which not only complicates the equipment but also requires painstaking efforts to organize the welding program. There was a point.

Further, according to the conventional example, the cylinder structure is elongated, making it difficult to incorporate this type of device into a narrow space such as a welding robot device.

The present invention has been made in view of the above circumstances, and it solves the conventional problems with a simple configuration and rational means. The purpose of this invention is to provide a device that allows for efficient operation of working machines.

Regarding rotation, the present invention will be described in detail. (1) is a casing, and a partition wall (2) is interposed in the center along the axial direction of the casing (1). Cylinder tube part (3α),
C3h). This cylinder tube part (3αX (3
Pistons (-ta) and (th) having rods (4tα) and (&A) are fitted in b) in the same direction, respectively, and rack gears (4113) are mounted on the opposite surfaces of the rods (daα) and (4113), respectively. Please α).

Attach (, <b). (7) is an output shaft that extends through the bulkhead (2) of the housing (1), and connects the spline-shaped pinion gear (8) provided on the output shaft (7) to the rack gear (ta). ) and (A). End plates [91, (10) are attached to the front and rear of the casing (1), respectively, and the front end plate (9) is provided with the cylinder tube part (10), respectively.
3α), (3h) air boat (//α)
, (//h) are provided, and the rear end plate 001 is provided with an adjustment screw (/2α), (/2h) that the rear end of the rod (≦α, C1, h') comes into contact with. The above structure constitutes the air cylinder of the present invention. In the figure, (13) is the bearing, (141 is the mounting hole of the output shaft (7) to the housing (1)), (+5
) is an operating member such as an arm coupled to the output shaft (7).

Next, to explain the action, when the boat (//b) is opened and air is injected from the boat (//α), the piston (
ta) moves to the left in the drawing until its rear surface abuts the stepped wall of the cylinder tube portion (3α). (Alternatively, the rod (daα) of this piston (!α) may be moved until the end of the rod (daα) (4'h) comes into contact with the inner surface of the rear end plate 001. The output shaft (7) is rotated via the pinion gear (8) by the rack gear (α) provided at ) in the opposite direction (to the right on the page).

Next, open the boat (//g) and pressurize air from the boat (//A), and the output shaft (7) will move in the opposite direction to the above action.
The output shaft (7) rotates by the same amount, and the output shaft (7) reciprocates in the X and Y range, as shown in the 1,4-s diagram, for example.

Next, the rod (daα) of the piston (jα) is brought into contact with the end plate 0α, and with the other adjusting rod (/2h) inserted, both pistons (!α), Cab) When operated alternately, the output shaft (
7) Rotate back and forth. The same is true vice versa.

In addition, in the state shown in the figure, either one of the adjustment frame rods (/, Iα
).

With the (/Jh) spirally advanced, the piston (!α),
Cjb), for example, X, A, or Y
.

The output shaft (7) is operated in the range between 9 and 9. It goes without saying that these angular ranges can be set to arbitrary angles depending on the degree of entry of the adjustment rods (l, !α) and (/2h). In addition, by combining a ratchet mechanism or a Geneva mechanism at the end of the output shaft (7), this continuous rotation with a variable rotation angle can be converted into linear motion, and it can be used as a drive source for an intermittent conveyor, for example, and can be used even if air is present. It is also possible to drive a conveyor.

As described above, according to the present invention, both pistons (ja>(jh
), air pressure acts on the front of the motor to give reciprocating rotation during the output stage,
Due to the relationship between the pinion and the rack, double rotation can be applied to the output shaft, and unlike conventional equipment, there is no difference in driving force between the forward and backward movements. The configuration can be significantly simplified, and the organization of the welding program can also be simplified. Furthermore, since the output shaft is placed between both piston rods (gα) and (4'h), the device itself can be made smaller and lighter, and it has excellent features such as being able to be installed in a narrow space.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view, Fig. 1 is a sectional view taken along the line A-A in Fig. 1, and Fig. 3 is an explanatory diagram showing changes in the rotation angle of the output shaft. (1)...Casing, (2)...Partition wall, (3α), (
313)...Cylinder tube part, (4tα), (<th
)...Rod, (!α), Cjl))... Piston, (≦a'), (<A) ,,, Rack gear, (
7)...Output shaft, (8)...Pinion gear, f91
．． QQI... end plate. (/la), (ith) ...Boat. Patent applicant Hongo Seisakusho Co., Ltd. Figure 2 Figure 3 Figure 52-

Claims (2)

[Claims] (1) Pistons facing the same direction are fitted into two parallel cylinder bodies, and rack teeth are provided on the opposing surfaces of the rod portion provided on the rear side of the pistons, and both racks are fitted with rack teeth. A driving device using a cylinder, characterized in that teeth are meshed with a pinion of an output shaft disposed between both rods, and a constant speed reciprocating rotation is applied to the front side of the piston. (2) The cylinder-based drive device described in Patent@Water Scope Item 11, characterized in that both cylinder bodies are provided in a common housing.