JPH062619U - Rotary solenoid - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] The linear motion, which is the magnetic attraction phenomenon of the coil,
In a rotary solenoid that converts a linear motion into a rotary motion by utilizing a steel ball (bearing ball) and an inclined groove (ball race), the linear motion A rotary solenoid that makes it possible to completely remove displacement (around 1 mm). [Structure] The solenoid main body has a conventional structure, the shaft is divided into two, a gap is provided in the longitudinal direction to absorb straight displacement, and a minute axis is arranged at a position orthogonal to the longitudinal direction of the shaft on the mating surface. Moreover, the split joint joint part is surrounded by a shaft guide (bearing), and a synergistic effect of preventing the minute shaft from falling off and preventing the split shaft from pulling out can be obtained.

Description

[Detailed description of the device]

[0001]

[Field of Invention]

 The present invention relates to the structure of a so-called no-axial type rotary solenoid that transmits only rotational force to a load.

[0002]

[Prior art]

 Conventionally, the structure of this rotary solenoid has been as shown in FIG. 1, in which a fixed portion composed of a case 1-a, a base (fixed iron core) 1-b, and a coil 1-c and an armature 1-. (2) It is composed of a rotating portion composed of d, hub 1-e, and shaft 1-f. The case 1-a and the armature 1-d are provided with inclined grooves (ball races) 1-j on which several (for example, three) bearing balls 1-i can roll. That is, by exciting the coil 1-c, the operation of the shaft 1-f, which serves as the output shaft, is directly converted into rotational motion, and rotational output torque according to the magnetomotive force is generated.

However, since the mechanism for directly converting the rotary motion is based on the structure of the inclined groove (ball race) 1-j for rolling the bearing ball 1-i, only the complete rotary motion is required. There was a slight but slight direct displacement along the groove slope (around 1 mm).

As for the load requirement, only rotational movement is desired, but it is completely impossible to eliminate this linear movement displacement as the solenoid itself because of the structure of the rotary solenoid. There was no choice but to rely on measures such as installing components such as joints that could absorb and remove unnecessary linear motion displacements toward the load-side structure to be assembled.

[0005]

[The purpose of the device]

 The rotary solenoid itself has a structure that can remove the linear movement, which is an unnecessary movement displacement generated on the output shaft of the rotary solenoid, by the rotary solenoid itself. It is an object of the present invention to allow the mechanical portion to have no need for any function for eliminating linear movement displacement.

[0006]

【Example】

 The joint structure that completely absorbs the linear movement displacement (around 1 mm) generated on the output shaft when the rotary solenoid operates is surrounded by the output shaft bearing (3). In this case, the shaft itself was divided into two, and in addition, a minute shaft for preventing slip-out was arranged at a right angle to the axial center of the output shaft so that the split shaft would not come out and separate when assembled as a rotary solenoid. .

2 and 3 show an embodiment of the present invention. FIG. 2-a is a detailed view of a shaft portion, 2-a is a shaft upper portion (hub side), 2-b is a shaft lower portion (load side), 2- Reference character c is a minute shaft for preventing the shafts from coming off, and shows a divided shape of the shafts. The remaining shaft is cut off by the radial dimension of the shaft so that it becomes a semi-circular axis. At the center of the cut-off surface, the diameter of the minute axis indicated by 2-c and the straight line generated during rotary solenoid operation A small groove is machined so as to be orthogonal to the longitudinal direction of the shaft with a width of the dimension including the dynamic movement displacement dimension and a depth of the radial dimension of the minute axis.

Reference numeral 2-c denotes a minute axis, which is cylindrical and has a length that fits within the shaft diameter.

When the shaft upper portion 2-a, the shaft lower portion 2-b, and the minute shaft 2-c of FIG. 2-a are assembled as described above, the outer surface becomes a shaft as shown in FIG. 2-b, which is an actual rotary solenoid. Is configured as shown in FIG.

Since the structural portion composed of the shaft upper portion 2-a, the shaft lower portion 2-b, and the minute shaft 2-c shown in FIG. 2-a is surrounded by the shaft guide 1-g in FIG. 3, The minute shaft of 2-c rolls in a small groove that can move without coming off from the joint, and when it reaches the end of the groove, it works like a wedge and the split shaft of the upper shaft 2-a and the lower shaft 2-b slips out. Prevent.

FIG. 4 conceptually shows the configuration and operation of the present invention. That is, when the coil is not excited as shown in FIG. 4-a, a gap 1 exists between the divided shafts 2-a and 2-b. When the coil is excited, the shaft upper part 2-a moves downward (4) in the figure as shown in Fig. 4-b, the clearance l is filled and l'≈ 0, and the clearance with the shaft lower part 2-b is almost zero. Therefore, the linear movement displacement of the shaft is completely absorbed.

Then, the rotational displacement generated in the upper shaft 2-a is transmitted to the lower shaft 2-b through the minute shaft 2-c without play, and only the rotational force P can be transmitted to the load.

[0013]

[Explanation of effect]

 A rotary solenoid that converts a linear motion, which is the attraction of an electromagnet by coil excitation, into a rotary motion by using a bearing ball and an inclined groove (ball race). As a result, it was possible to completely eliminate unnecessary linear motion displacement, which was impossible to completely remove. This makes it possible to provide a rotary solenoid that has a simple structure and can be mounted without changing the mechanism on the load side in the case of a load that requires only a rotational force and does not require a rectilinear force.

[Brief description of drawings]

FIG. 1 is a structural diagram of a conventional rotary solenoid.

2A and 2B are detailed views of the shaft portion of the present invention.

FIG. 3 is a structural diagram of the rotary solenoid of the present invention.

FIG. 4 is a conceptual diagram of the configuration and operation of the present invention.

[Explanation of symbols]

 1-a case 1-b base (fixed iron core) 1-c coil (5) 1-d armature 1-e hub 1-f shaft (output shaft) 1-g shaft guide (bearing) 1-h Shaft retaining ring 1-i Bearing ball (steel ball) 1-j Ball race (tilted groove) 2-a Shaft upper part (hub side) 2-b Shaft lower part (load side) 2 -C Micro-axis l, l'Gap p Rotating force

Claims (1)

[Scope of utility model registration request] 1. A fixed magnetic pole comprising a magnetic material case enclosing a coil, a base (fixed iron core) fixed to the case, and a magnetic material hub arranged to face the base. Sticky a
A movable iron core made of a mature member and fixed to the movable iron core,
A shaft for transmitting the power of the movable iron core to the output, and a ball race (ball groove) having an inclination is provided on the facing surface of the magnetic body case and the armature, The box
A steel ball (bearing ball), etc., which is housed in the ruler so that it can roll freely, moves in the ball race by the suction and release operations of the moveable iron core. In a rotary solenoid that converts the power of a shaft to a rotational direction and transmits the power in the straight traveling direction and the rotational direction to the shaft, the shaft is divided in a longitudinal direction by a joint structure, and the joint structure is a straight shaft of the shaft. A gap is provided between the divided shafts so as to absorb the movement in the direction, and a minute shaft is further arranged on the mating surface of the divided shafts in a direction that suppresses the pulling force in the longitudinal direction of the shaft. A rotary solenoid characterized by transmitting only the rotational movement of the fixed shaft portion to the divided shaft side without play and transmitting only the rotational force to the load.