DE1034109B - Assembly tool for open, resilient retaining rings - Google Patents

Description

GERMAN

The invention relates to an assembly tool for open, resilient retaining rings, which preferably can be used in the ring grooves of shafts or axles and to secure machine parts serve against axial displacement on the shafts or axles.

It is known to bring these locking rings close to the shaft groove by a spring hook and there in the groove with an auxiliary tool, e.g. B. with a screwdriver. There is also an assembly tool known that consists of a handle and a leaf-shaped one firmly connected to this There is gripper, the front end of which is resiliently expandable by longitudinal slitting in two in the plane of the sheet Fork tines tapering, each fork tine having a back flange that tapers with a concave cylindrical face on about a quarter of the outer peripheral surface of the locking ring to be mounted and in this area also with a narrow lateral support surface on one of the two flat side surfaces of the ring so that the detected locking ring with the opening facing forward is trapped between the forks. In this position, the locking ring is by means of the known The gripper is pressed onto the shaft or into the annular groove of the shaft, and then the gripper is pushed by removed from the mounted circlip. The disadvantage, however, is that in this known assembly tool the locking ring has only a slight lateral hold and that when the locking ring is put on not only its spring force, but also the spring force of the fork has to be overcome, which makes it more difficult to put on and the ring can move sideways. Furthermore must a special tool with a corresponding gripper opening can be kept ready for each ring size. In addition, the known tool is only for attaching, but not also for pulling off the locking rings suitable, so that a special pulling tool is still available for this purpose must, which is designed similar to the plug-on tool, but forks extended to the front which encompass the opening edges of the locking ring with inwardly protruding lugs, which enables the ring to be pulled off the shaft.

The invention is based on the object of an assembly tool for open, resilient retaining rings to create that is suitable for several ring sizes and can be attached as well as removed the locking rings on or from shafts or axles can be used in both cases only the resilient resistance of the locking ring itself needs to be overcome.

Assembly tool
for open, resilient circlips

Applicant:

Walther-Büromaschinen GmbH,
Gerstetten (Württ.)

Georg Walther f, Gerstetten (Württ.),
has been named as the inventor

The object of the invention is essentially achieved in that a handle is provided along a Rail with preferably concavely rounded end face with at least one over the end face gripping nose provided slide is guided, the nose with a part of its outer peripheral surface on the front side of the rail adjacent locking ring inside detected and pulls against the front side. According to a further feature of the invention, the slide is of a spring with its nose against the Pulled the front of the rail. In this case, there is no need for a special actuating device to move the slider.

The handling of the tool is particularly simple and handy that after a special embodiment of the invention, the spring is designed as an outwardly curved leaf spring, one end of which is attached to the slide and the other end of which is attached to the rail.

In a preferred embodiment of the invention, the rail is flat and U-shaped includes in its front part with its U-legs leading the side edges of the slide, so that the slide cannot lift off the rail.

To include such circlips that are not at hand Sitting on the shaft, being able to pull it off, can finally turn one on the rail be provided on the shaft seated locking ring in the ready-to-hand position serving lever, the can be swiveled parallel to the rail plane and can be locked in both positions aligned with the rail, the end of the lever protruding beyond the nose of the slide in the position of use.

The inventive design of the assembly tool ensures in an advantageous manner secure holding of the captured locking ring both when placing it on the shaft or axis as

809 560-13

Claims (5)

even when pulling it off, so that the locking ring cannot fall into the interior of the machine, which experience has shown may make it necessary to dismantle the entire machine. Furthermore, the small width and thickness of the gripping end of the subject matter of the invention make it possible to attach and remove locking rings even in inaccessible and narrow places, such as those in large numbers of office machines. In the drawing, an embodiment of the invention is shown, namely Fig. 1 shows the front view of the assembly tool, Fig. 2 is a section along the line AB in Fig. 1, Fig. 3 is partially the same section as Fig. 2 with the adjusting lever aligned, Fig. 4 shows a cross section along the line CD of Fig. 1, Fig. 5 shows a cross section along the line EF of Fig. 1, Fig. 6 shows the upper part of the assembly tool with another embodiment of the grip slide, Fig. 7 shows a shaft with a Ring groove for inserting a locking ring, Fig. 8 a section along the line GH through the shaft with the locking ring attached. ■ A gripping slide 1 is slidably guided along a rail 2, the flat U-shaped rail with its U-legs 3 guiding the side walls of the slide 1, e.g. B. in the form of a dovetail guide. A leaf spring 4 is attached to the slide 1 by means of rivets. The leaf spring lies partially in the U-shaped rail and is attached to it by means of a screw connection 5. On the slide there is a nose 6 which is bent to the side and engages over the face of the rail. In the embodiment according to Fig. 6, two lugs 7 are provided on the slide. The spring 4 is curved outward at 10, so that when the curvature is pressed, the spring 4 stretches and advances the slide, whereby a gap is created between the nose 6 and the end face 12. The rail 2 is inserted into a handle 16. At this end of the rail, a plate 17 is also fastened, preferably with the aid of the screw connection 5, which also holds the spring 4. The plate 17 serves as a directional element to support the correct posture of the tool. A lever 18, which is provided with a nose 19 and a locking pin 20, is mounted pivotably in the rail plane on the rail 2. This lever can be pivoted into the active position 22 shown in Fig. 3 or into the non-use position 21 indicated by dash-dotted lines in Fig. 1, each time the pin 20 resiliently engages in a recess or recess in the rail. The mode of operation of the assembly tool is as follows: To insert a locking ring, the slide 1 is pushed forward by pressing on the bulge 10 of the spring 4, and a locking ring 9 is then inserted between the nose 6 of the slide 1 and the end face 12 of the rail 2, that its outer peripheral surface 11 rests against the preferably concavely rounded end face 12 of the rail and the nose 6 engages the inside of the ring 9, within one of the recesses 8 on the ring Ring 9 and clamps it between the nose 6 and the end face 12 of the rail 2. The locking ring can then be inserted into an annular groove 14 of a shaft 15 in a resilient manner by exerting axial or somewhat oblique pressure on the handle of the tool. To pull off a locking ring seated on the shaft 15, the nose 6 is also removed from the end face 12 of the rail 2 by pressing on the ίο curvature 10 of the spring 4, and the nose 6 or the noses 7 (Fig. 6) are inserted into the Recesses 8 (Fig. 8) of the ring 9 inserted. By letting go of the spring 4, the ring 9 is clamped to the end face 12 of the rail 2 and then pulled off the shaft or axle, which is arranged, for example, inside an adding machine, simply by removing the assembly tool. In the event that a lock washer is not at hand, i.e. H. seated on the shaft 15 with the opening 23 facing the user of the tool, the locking ring on the shaft can be rotated into a pull-off position by means of the lug 19 of the lever 18 pivoted forward in accordance with FIG. 3. Patent α ν s v rvcue-. 1. Assembly tool for open, resilient retaining rings, characterized in that longitudinally a rail (2) provided with a handle (16) and preferably with a concavely rounded end face (12) a slide (1) provided with at least one nose (6) reaching over the end face is guided, wherein the nose (6) with part of its outer circumferential surface on the end face (12) the inside of the locking ring (9) resting against the rail and pulls it against the face. 2. Assembly tool according to claim 1, characterized in that the slide (1) of one Spring (4) is pulled with its nose (6) against the end face (12) of the rail (2). 3. Assembly tool according to claims 1 and 2, characterized in that the rail (2) Is flat U-shaped and in the front part with their U-legs the side edges of the Includes slide (1) leading. 4. Assembly tool according to claims 1 and 2, characterized in that the spring (4) is designed as an outwardly curved leaf spring, one end of which on the slide (1) and the the other end is attached to the rail (2). 5. Assembly tool according to claim 1, characterized in that a to the rail (2) Turning a circlip to be withdrawn into the ready-to-hand position, serving in the rail level pivotable lever (18) which can be locked in both parallel positions to the rail is mounted, the end of which extends in the position of use over the nose (6) of the slide (1). Considered publications:
British Patent No. 670,733;
U.S. Patent Nos. 1,779,306, 1,874,257,
474 222, 2 483 379, 2 518 142. 1 sheet of drawings 809 560/113 7.58