JPH0138323Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a so-called intermediate stop device that stops a vane at an arbitrarily set predetermined intermediate position within the swing stroke of a vane-type swing motor (rotary actuator), and particularly This invention relates to an improvement in the structure related to Utility Model Application No. 168256/1983 filed by the same applicant. As shown in FIG. 1, the above-mentioned Utility Application No. 58-168256 has a fixing plate 5 fixed to one side of a vane type swing motor body 1 and having a tapered engagement surface 5a at one end, It has an arm 13 fixed to a swing shaft 4 that further protrudes from one side of the motor body through the inside of the fixed plate, and has a tapered engagement surface 7a at one end that engages with the fixed plate. A movable block 7 on which a stopper 8 with which the arm abuts is removably attached and a flange 7c formed on the outer periphery, and a fixing ring that engages with the flange of the movable block and clamps and fixes the movable block between the fixing plate. 11, which is an intermediate stop device for a vane type swing motor, which comprises:
Position and fix the fixed plate and movable block.
Since this is done using the tapered engagement surfaces and fixing rings on both sides, machining is difficult and the cost is high.
It is difficult to miniaturize the entire device, and furthermore, to change the swing angle, it is necessary to loosen and tighten a plurality of screws 12 due to the structure, which makes the device cumbersome to operate. The purpose of the present invention is to eliminate the above-mentioned drawbacks, simplify the structure, downsize the device, and reduce manufacturing costs, and provide an intermediate stop device for a vane-type swing motor that is easy to operate. Its gist is that it is fixed to one side of the vane type swing motor body and has an annular groove on the outer periphery, and is fixed to a swing shaft that further protrudes from one side of the swing motor body through the inside of the fixed plate. and an annular groove having a size corresponding to the annular groove of the fixing plate at one end of the inner peripheral part,
a movable block having a set screw member screwed into a screw hole opening into the annular groove from one location on the outer periphery, and a stopper with which the arm abuts is removably attached at one location on the inner periphery; The movable block is rotatably held relative to the fixed plate by interposing a number of spheres in both annular grooves, and the movable block is fixed to the fixed plate via the spheres by the operation of the set screw member. It is characterized by this. Details will be explained below with reference to drawings showing examples.

FIG. 3 shows an embodiment in which the device of the present invention is mounted on the conventionally known single vane type swing motor shown in FIG.
A vane 102 sliding inside the chamber 100a of 00;
It has a vane stopper 103 fixed in the chamber 100a of the main body 100, and has a vent 100b and a vent 100.
The vane 102 is swung at a certain angle by actuation of a switching valve (not shown) connected to c. The vane 102 is constructed integrally with a swing shaft 104, which projects from both sides of the main body 100, as clearly shown in FIG. A fixing plate 1 is attached to one end surface 100d of the main body 100.
05 is attached with three screws 106 as shown in FIG. The fixed plate 105 is the third
As shown in the figure, the fixing plate 105 has an annular V-groove 105a on its outer periphery, and an annular V-groove 1 having a size corresponding to the annular V-groove 105a on the outer periphery of the fixing plate 105.
A cylindrical movable block 107 having 07a on its inner periphery
is installed. A large number of spheres 108 such as steel balls are inserted into the annular groove formed by these two annular V grooves 105a and 107a, and hold the movable block 107 against the fixed plate 105. A screw hole 107b is opened from this location into the annular groove 107a, and a set screw member 109 is screwed therein so as to be operable from the outside. By operating this set screw member 109 and pushing the steel ball 108 with its tip, the steel ball 108 is expanded in the circumferential direction and radial direction within the annular groove.
The movable block 107 is fixed to the fixed plate 105 by forming a single roller-shaped fixed body in close contact with the inner surface of the fixed plate 7a to prevent the individual steel balls 108 from rotating. A groove 107c is formed at one end face portion of the movable block 107.
An arm stopper 110 is removably attached to 07b and fixed with a screw 111. Further, a damper member 112 made of rubber or the like is attached to the arm abutting surface of the arm stopper 110. An arm 11 as shown in FIGS. 3, 4, and 5 is attached to the protruding end of the swing shaft 104 on the mounting side of the fixed plate 105.
3 is fixed, and when the vane 102 swings, the arm 113 also swings together with the arm stopper 110 attached to the movable block 107.
It collides with the object and causes an intermediate stop.

In this device configured as described above, the fixed plate 105 and the movable block 107 are engaged with each other by the annular grooves 105a, 107a and a large number of steel balls 108 inserted into the annular grooves. By operating the steel ball 108 and pushing the steel ball 108 with its tip, the steel ball 108 is expanded in the circumferential direction and radial direction within the annular groove, and the annular groove 105a and 1
Since the movable block 107 is fixed to the fixed plate 105 by forming a single roller-shaped fixed body in close contact with the inner surface of the steel ball 108 and fixing the movable block 107 to the fixed plate 105, 58−168256
Compared to the intermediate stop device of No. 1, the entire device can be made smaller in the radial direction, and the device can be provided with a simple structure and low cost with fewer parts. Furthermore, the intermediate stop position can be arbitrarily adjusted by simply manually operating one set screw member screwed onto the movable block, which has an excellent effect in terms of operability. In addition, by forming a scale indicating the swing starting point on the fixed plate side and a scale indicating the swing angle on the movable block side, the intermediate stop position can be set arbitrarily, similar to the earlier application No. 168256/1983. This also has the effect that it can be set with high accuracy.

[Brief explanation of the drawing]

FIG. 1 is a partial sectional view showing a conventional example, FIG. 2 is a sectional view showing a conventionally known single vane type swing motor, and FIG. 3 is a front sectional view (swing motor portion) of an embodiment of the invention. depends on the cross section),
4 is a side view taken in the direction of arrow A in FIG. 3, and FIG. 5 is an enlarged explanatory view of the BB cross section in FIG. 3. Explanation of codes, 100...Main body, 100a...
Chamber, 102... Vane, 103... Vane stopper, 104... Rocking shaft, 105... Fixed plate, 105a... Annular groove, 107... Movable block, 107a... Annular groove, 108... Steel ball, 10
9... Set screw, 110... Arm stopper, 1
12... Damper member, 113... Arm, 10
6,111...screw.

Claims (1)

[Scope of utility model registration request] Fixed to one side of the vane type swing motor body,
a fixing plate having an annular groove on its outer circumference; an arm fixed to a swinging shaft protruding from one side of the swing motor body through the fixation plate; It has an annular groove of an appropriate size, and a set screw member is screwed into a screw hole opening into the annular groove from one location on the outer periphery, and a stopper against which the arm abuts can be attached and detached at one location on the inner periphery. The movable block is rotatably held relative to the fixed plate with a number of spheres interposed in both annular grooves, and the fixed plate is rotated through the spheres by the actuation of the set screw member. An intermediate stop device for a vane type swing motor, characterized in that the movable block is fixed to the intermediate stop device for a vane type swing motor.