JPS5819161U

JPS5819161U - Worm and worm wheel type overload operation prevention device

Info

Publication number: JPS5819161U
Application number: JP11501081U
Authority: JP
Inventors: 泰幸川田
Original assignee: 川田鉄工株式会社
Priority date: 1981-07-30
Filing date: 1981-07-30
Publication date: 1983-02-05
Also published as: JPH0357371Y2

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は、この考案に係る過負荷運転防止装置の１実施
例を示す部分破断正面図、第２図は、前記装置の側面図
、第３区は、第１図における前記装置の作動状態を示す
部分破断正面図、第４図は、前記装置の他の実施例を示
す部分破断正面図、第５図は、第４図における前記装置
の作動状態を示す部分破断正面図、第６図は、この考案
による過負荷運転防止装置を回転制御機構と併用して、
スクロールチャックを制御するようにした使用例を示す
部分破断側面図、第７図は、前記回転制御機構の１実施
例を示す縦断側面図、第８図は、第７図における前記機
構内の回転部分の配列状態を示す概略的な正面図、第９
図は、前記機構の部分的な変形例を示す概略的な正面図
、第１０図は、前記機構の他の実施例を示す縦断側面図
、第１１図は、第１０図における前記機構内の回転部分
の配列状態を示す概略的な正面図である。FIG. 1 is a partially cutaway front view showing one embodiment of the overload operation prevention device according to the invention, FIG. 2 is a side view of the device, and the third section shows the operating state of the device in FIG. 1. FIG. 4 is a partially cutaway front view showing another embodiment of the device, FIG. 5 is a partially cutaway front view showing the operating state of the device in FIG. 4, and FIG. uses the overload operation prevention device of this invention together with the rotation control mechanism,
FIG. 7 is a partially cutaway side view showing an example of use in which a scroll chuck is controlled; FIG. 7 is a longitudinal sectional side view showing one embodiment of the rotation control mechanism; FIG. 8 is a diagram showing the rotation inside the mechanism in FIG. Schematic front view showing arrangement of parts, No. 9
10 is a longitudinal sectional side view showing another embodiment of the mechanism, and FIG. 11 is a schematic front view showing a partial modification of the mechanism. FIG. FIG. 3 is a schematic front view showing the arrangement of rotating parts.

Claims

[Claims for Utility Model Registration] 1. A rotating shaft of a worm 2 is connected to a rotating drive shaft Ma of a motor M, etc. via a slide-type rotating connector 1, and a normal shaft of the worm 2 is connected to the rotating shaft Ma of a motor M, etc. By installing one or more spring members that work to maintain the meshing position, the worm 2 or the worm wheel 3
When an excessive rotational torque is applied to the worm, the overload operation prevention mechanism is configured to elastically deform the spring member and slide (release) the rotating shaft integrally with the worm 2 in the axial direction. At this point, a main spring 4 compressed in advance with a predetermined pressure is attached to a set of collar members 5. on the outer periphery of the extended shaft portion 2a of the worm 2.
6, any one of these collar members
5, when the worm 2 is in the normal meshing position, the housing hole 1 of the extension shaft portion 2a that extends to the main spring 4 is
While locking to a suitable fixed engagement part 7a in the worm 7, similarly, when the worm 2 is in the normal meshing position, the other worm 2 is substantially engaged with the worm 7. The worm 2 is locked by another integrated fixed engagement part 7b, and in this state, the worm 2 is rotated in either the left or right direction due to excessive rotational torque at an appropriate location on the extended shaft portion 2a. As it slides in the (axial direction),
A pushing member 8 that acts to separate one of the collar members 6 from the corresponding fixed engagement portion 7b and compress the main spring 4 is provided, and this pushing member and the corresponding A worm and worm wheel type overload operation prevention device characterized in that an intermediate member 9 is interposed between the collar member 6 and the collar member 6. 2. A main spring 4, which has been compressed in advance with a predetermined pressure, is interposed on the outer periphery of one extended shaft portion 2a of the worm 2 by a pair of collar members 5 and 6, and any of these collar members When the worm 2 is in the normal meshing position, the main spring 4 and the extended shaft portion 2a are locked to appropriate fixed engagement portions 7a in the housing 7. Similarly, the other one 6 is connected to the worm 2.
When the housing 7 is in a normal engagement position, it is locked by another fixed engagement part 7b that is substantially integrated with the housing 7, and in such a state, the extension shaft portion 2a is held at an appropriate position. As the worm 2 slides in either the left or right direction (axial direction) due to excessive rotational torque, one of the collar members 6 is separated from the corresponding fixed engagement portion 7b. , a pushing member 8 acting to compress the main spring 4 is disposed, an intermediate member 9 is interposed between this pushing member and the corresponding collar member 6, and the other of the worms 2 A sub-spring 4' that acts to bias the worm 2 toward the main spring 4 is installed on the outer periphery of the extended shaft portion 2b, and the spring constant of this sub-spring is set as the spring constant of the main spring 4. The overload operation prevention device according to claim 1, characterized in that the overload operation prevention device is set at approximately the station of the utility model registration claim 1. 3. A piston-like connecting shaft receiving chamber 12 is formed inside one end of the housing 7, and the head portion 14a of the piston-like connecting shaft 14 accommodated in this housing chamber and the side on which the sliding type rotary connector 1 is not attached are formed. A pair of limit switches 21 and 22 are interlocked and connected to the extension shaft portion 2a and inserted into the electric control circuit of the motor M, etc., on the outer peripheral side of the rod portion 14b of the piston-like connecting shaft 14. 2. The overload operation prevention device according to claim 2, which is characterized in that a switching block 19, 20 for switching operation is attached. 4 Connect the rotational shaft of the worm 2 to the rotational drive shaft Ma of the motor M etc. via the slide-type rotational connector 1, and maintain the normal meshing position of the worm 2 on this rotational shaft. By installing one or more active spring members, when excessive rotational torque is applied to the worm wheel 3, the spring member is elastically deformed and its rotating shaft is slid in the axial direction integrally with the worm 2. (
17 is an overload operation prevention mechanism, which has a configuration that meets the requirements of a1 below, and a mechanism that can automatically open and close the plurality of chuck jaws 2 in the scroll chuck. A rotation control mechanism capable of rotating the scroll plate X of the chuck relative to the chuck body Y, comprising the following b.
An overload operation prevention device according to claim 1, characterized in that it combines the following requirements. a The main spring 4, which has been compressed in advance with a predetermined pressure, is interposed on the outer periphery of the extended shaft portion 2a of the worm 2 by a pair of collar members 5 and 6, and any one of these collar members When the worm 2 is in the normal meshing position, the worm 2 is locked to an appropriate fixing and retaining portion 7a in the housing nozzle 7 of the main spring 4 and the extension shaft portion 2a. Similarly, when the worm 2 is in the normal meshing position, the other one 6 is locked by another fixed retaining part 7b that is substantially integrated with the worm 2. In such a state, as the worm 2 receives excessive rotational torque and slides in either the left or right direction (axial direction), one of the appropriate positions on the extended shaft portion 2a slides. A pushing member' 8 is provided which acts to separate the collar member 6 from the corresponding fixed engagement portion 7b and compress the main spring 4, and this pushing member and the corresponding collar member are An intermediate member 9 is interposed between the member 6 and the member 6. b. In the casing 80 having a substantially cylindrical gear receiving space 80', along the axial direction, at least one intermediate gear 42.52 and an outer internal gear 41.51 meshing with each of the intermediate gears 41.51. A set of driving side gear trains 40 consisting of
and the driven side gear trains 50 are arranged oppositely, a common synchronous rotating member 60 is connected to two opposing gears in these gear trains, and in this state, the driven side gear trains 50 are connected to the synchronous rotating member. The casing 80 allows the gear on the driven side to
While supporting it so that it can only rotate on its own axis, in the same state, the gear on the driving side connected to the synchronous rotation member 60 is moved around the synchronous rotation member 60 by the arm portion 71 of the meshing position shifting mechanism 70. The synchronous rotating member 6 in the gear train is supported so that it can rotate while rotating.
Provided on the other two corresponding gears not connected to the gears 0, outer circumferential tooth portions that individually mesh with the outer circumferential tooth portions on the scroll disk X and the chuck body Y, and the meshing position shifting mechanism. 70 is arranged so as to be able to rotate integrally with the worm wheel 3 in the above-mentioned overload operation prevention mechanism.