DE1280768B - Device for pulling open, resilient locking rings onto shafts, in particular shock absorber piston rods - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. CL:

Number:
File number:
Registration date:
Display day:

B 25b

German class: 87 a -22

P 12 80 768.0-15 (B 73483)

September 12, 1963

17th October 1968

The invention relates to a device for pulling open, resilient locking rings on shafts, especially shock absorber piston rods, which consist of a columnar circlip stacked containing handle tube, a plunger sleeve axially displaceable therein and an im The lower part of the handle tube consists of a transversely displaceable slide with an operating handle.

In a known device of the above type, the bottom locking ring in each case becomes a column stacked circlips through the transversely mounted slide initially radially under one made of permanent magnetic material, which is pushed together with the adhering locking ring is lowered, after which the locking ring is then replaced by a special Mounting slide widened radially to the annular groove provided in the shaft with strong expansion will. This type of assembly is not only dangerous due to the strong expansion of the locking ring with it that the ring breaks, but there is also only a slight introduction of the shaft into one A hole provided for them in a plate arranged below the stack of circlips is possible. As a result, the circlips can naturally only be applied to the beginning or the end of the shaft, but not be applied to their midst.

The same disadvantages are also present in another known device in which the lowest one Circlip by moving a slide onto the ring groove one in a next to the circlip stack located bushing to be inserted shaft is spread.

The invention is based on the object of providing a device of the known type mentioned at the beginning to create, with a simple structure, a serial assembly of circlips in any Making of shafts provided ring grooves allows as well as an overstressing of the spreading Circlips and damage to the shaft can be avoided with certainty. That is according to the invention achieved in that a spreader plate between the circlip stack and the slide with one for receiving the lowest circlip axially pushed off the circlip stack Serving keyhole-like recess is provided into which one on the slide from below provided wedge-shaped expansion nose protrudes, which is the locking ring located in the recess when the slide is partially extended, it spreads from the inside to the outside and when it is fully extended Slide on the in the then through last-

Device for pulling open,
resilient circlips on shafts,
especially shock absorber piston rods

Applicant:

August Bilstein,

5828 Ennepetal-Altenvoerde

Named as inventor:
Ewald Altfeld, 5828 Ennepetal-Milspe;
Hubert Fraune, 5828 Ennepetal-Altenvoerde;
Paul Herbeck, 5830 Schwelm

Ren exposed recess can jump in shaft to be inserted. It is therefore characteristic of the invention that that the lowermost locking ring gets into a spreader plate, in which it goes through the on the slide located spreading nose is initially widened or spread radially from the inside to the outside and afterwards The slide is then extended onto the shaft that has meanwhile been pushed into the exposed recess or can spring back and forth in their groove. Since doing the wave through the temporarily widened or spread locking ring is pushed through, so the latter not about laterally or radially is pushed over the shaft or its annular groove, the retaining ring needs to be pushed onto the Wave to be spread only relatively little, so that its resilience accordingly lower requirements can be made. The shaft is also pushed in axially in the circlip, not surface damaged by the latter.

It belongs to the known state of the art, slotted retaining rings by a wedge-shaped To widen the nose. Here, however, the wedge-shaped nose, which is attached to assembly pliers, is a mandrel or a slide of a circlip pulling device can be provided, radially from the outside inserted into the locking ring slot. Such an assembly is not for series production but only suitable for one-off production.

809 627/1068

3 4

According to a further feature of the invention is rotatably mounted. For this purpose it is at the top provided that the circular part of the key outside of the handle tube 1 arranged a spring 6, Hole-like recess of the spreader plate one with its inwardly rolled end into one Spreading diameter of the spread locking ring in the punch sleeve 2 provided longitudinal groove 7 hinges has a corresponding diameter, while 5 protrudes and thus holds the sleeve non-rotatable. One Its slot-shaped part is one of the other fastened into the recess at the upper end of the handle tube 1 The inwardly bent end of the spring 8 rests on the corresponding contour protruding into the expanding nose sits, and that the locking rings continue to be on one of the outside of the punch sleeve 2, so that the latter Slidably mounted magazine rod in the handle tube with a certain frictional engagement in the handle are, which is guided at its lower ends an xo tube 1 or its lining Γ. To the has conical splayfoot. In this way, it is positioned next to one another on the magazine rod 4 enables the circlips 3 to be provided with circlips to be able to be stored without twisting, Shaft by moving the magazine rod and a longitudinal rib 9 is pre-stamped sleeve on the magazine rod 4 See inserted as far into the handle tube, which also serves to hold the magazine rod 4 and thus the locking ring on any 15 relative to the punch sleeve 2 without twisting Place of the wave can be applied. keep.

In a further embodiment of the invention, the magazine rod 4 is at its lower end

Spreading slide a double-armed actuating a conical spreading foot 10, which prevents the Linkage lever articulated, which is mounted on the handle tube and lined up with circlips 3 from the rod 4 cushioning is supported and can fall essentially par ao. Below the magazine rod 4 is in allele extends to the handle tube. About this actuation the handle tube 1 a transversely mounted lever, the expanding slide can be arranged very conveniently in its slide 11, on the top of which is a respective working positions, namely the receiving, expanding nose 12 is located on the underside of the Spreading and delivery position for each of which is applied via the splayfoot 10 of the magazine rod 4. the The lower end of the magazine is stripped off the securing ring will. art that the nose wedge 12 'in the normal or external

The transfer of the expanding slide in its every operating position of the device with the one on the The respective working position is aligned with the longitudinal rib 9 provided by means of the magazine rod 4 operating lever, can be further simplified. To this at the height of the expanding slide nose 12 is a preferred purpose the actuating lever according to the invention has 30 as a steel spreader plate 13 vorgean its free end has a convex appearance, which in the mouth side in the handle tube 1 impact, which is used when reaching the spread position of the slide provided recess 14. the Bers strikes the handle tube and between its spreader plate 13 has a keyhole-like convex stop and its bearing point on the handle recess 15, the circular part 15 'of which is one of the Pipe-located articulation joint, by its buckling 35 spreading diameter of the locking ring corresponding Expanding slide from its expanded position into which the diameter has, during the slot dispensing position got. shaped part 15 ″ one of the in the recess 15

Further features according to the invention are said to be in the wedge-shaped expanding nose protruding into it Hand of an embodiment shown in the drawing 12 of the slide 11 has a corresponding contour, example described. 40 shows below the expanding slide 11 are in the handle

Fig. 1 shows the device with in the receiving position tube recess 14 still with through openings located expanding slide arranged in partial longitudinal 16 provided support plates 17, which for cut, guide the expansion slide 11 are used.

F i g. 1 a a corresponding section in ver. While the inner end of the expanding slide 11

on a larger scale, 45 is concave, that is from a lateral

F i g. 2 a section along the line H-II of the slot 18 of the handle tube 1 protruding end 11 '

Fig. 1, the slide 11 is fork-shaped. At this

Fig. 3 the device with the fork end in the spread position is via the screw 19 of the double

sensitive slide, armed actuating lever 20 articulated, the

F i g. 4 shows a section along the line IV-IV in FIG. 50 at the bearing part 21 located on the handle tube 1

F i g. 3, is pivoted and under the action of the spring

F i g. 5 the device is also in the delivery position. Which is essentially parallel to the handle

Sensitive slide in a partial longitudinal section and pipe 1 extending actuating lever 20 has on

which is its free, the articulation on the slide 11 opposite

F i g. 6 a section along the line VI-VI of the 55 overlying end of a convex shape

Fi g. 5th beat 23. Between the latter and the bearing point 21

The illustrated device for pulling up the lever 20 also has an articulated joint 24, which

open, resilient circlips on shafts, which can be folded in on one side.

special shock absorber piston rods, consists of the essentials for using the new circlip From the handle tube 1, the device placed therein is first of all the magazine rod 4 with it slidably mounted punch sleeve 2 and the latter in a suitable number of circlips 3 to be used, several fills one on top of the other and then inserted into the punch sleeve 2, the lying circlips 3 carrying magazine rod 4. is then pushed into the handle tube 1, wherein The magazine rod 4 with its splayfoot 10 rests on the topmost of the lined up securing rings is seated on the punch sleeve 2, which sits on its from the 65 of the expanding nose 12 of the slide 11. Will Handle tube 1 protruding end a handle button 5 then located on the punch sleeve 2 having. The stamp sleeve 2 is in the grip button 5 surrounding it, a slight axial pressure on the underneath exercised the handle tube 1 or in its lining 1 'without the sleeve 2 located retaining rings 3, so

the lowermost securing ring 3 'is pushed over the conical expanding foot 10 of the magazine rod 4 and delivered to the expanding slide 11. The latter is located in the FIG. 1 and 2 shown receiving position A. The locking ring 3 ', which is centered on the slide 11 by the longitudinal rib 9 on the magazine rod 4 and stripped off via the splayfoot 10, lies flat and unstressed on the upper side of the slide 11 in such a way that the wedge 12 'The expanding nose 12 protrudes into the opening of the locking ring 3' located between the ring ends. In order to spread the securing ring 3 ', the actuating lever 20 is gripped at its upper stop 23 and pressed inward onto the handle tube 1 until the convex stop 23 strikes the handle tube 1. By actuating the lever 20, the expanding slide 11 reaches the position shown in FIGS. 3 and 4 shown spread position B for the locking ring 3 '. Here, the nose part located behind the wedge 12 'of the expanding nose 12 has pushed into the opening of the securing ring 3', as a result of which the ring 3 'is expanded to the desired expanding diameter. The securing ring 3 'is supported with its outside in the circular part 15' of the keyhole-like recess 15 in the spreader plate 13, whereby it is held in the circular shape. The expansion nose 12 is largely retracted into the slot-shaped part 15 ″ of the recess 15 in the expansion plate 13, as shown in FIG 15 releases in the spreader plate 13, the shaft 26, for example a shock absorber piston rod, can now be pushed into the grip tube 1 until its groove 27, which receives the locking ring 3 ', strikes the expanded ring 3' (FIG. 5) The punch sleeve 2 and the magazine rod 4 have moved upwards by a corresponding amount in the direction of arrow 25. In order to prevent the locking ring 3 'from being taken along in the axial direction when the piston rod 26 is pushed in, the circular part 15' of the keyhole-like recesses 15 is in the Spreader plate 13 slightly larger in diameter than the inner diameter of the handle tube lining 1 ', so that at the lower end of a protruding peripheral edge 28 arises, on which the locking ring 3 'can be supported.

In the pushed-in position of the piston rod 26, that located on the actuating lever 20 is now Articulated joint 24 buckled inwards, causing the expanding slide 11 to move out of its expanded position B reaches the delivery position C shown in FIGS. 5 and 6. The expanding slide 11 is pulled out so far that its expanding nose 12 completely into the slot-shaped recess 15 "in the spreader plate 13 retracts and thereby the spread locking ring 3 'releases so that the latter into the groove 27 provided in the piston rod 26. The piston rod 26 can then take off the handle tube 1 can be pulled out. The actuating lever 20 returns under the action of its spring 22 back in its in fig. 1 position shown back and thus brings the expansion slide 11 in its Pick-up position A. Finally, the magazine rod 4 and the punch sleeve 2 are down pushed until the expansion foot 10 of the magazine rod 4 rests on the expansion nose 12 of the slide 11. the The device is then ready for operation again.

Claims (6)

Patent claims: 1. Device for pulling open, resilient locking rings onto shafts, in particular Shock absorber piston rods, consisting of a circlip stacked like a column containing handle tube, an axially displaceable therein punch sleeve and one in the lower Part of the handle tube with transversely displaceable slider with operating handle, characterized in that that between the circlip stack and the slide (11) a spreader plate (13) with a for receiving the lowest, from the circlip stack axially pushed off circlip (3 ') serving keyhole-like Recess (15) is provided into which one provided on the slide (11) from below wedge-shaped expansion nose (12) protrudes, which is located in the recess (15) retaining ring (3 ') when the slide (11) is partially extended from the inside to the outside, and when it is fully extended extended slide (11) to be pushed into the recess (15) then exposed by the latter Shaft (26) can jump in. 2. Apparatus according to claim 1, characterized in that the circular part (15 ') of the Keyhole-like recess (15) of the spreader plate (13) one of the spreading diameter of the spread Circlip (3 ') has a corresponding diameter, while its slot-shaped Part (15 ") corresponds to one of the expanding nose (12) protruding into the recess (15) Has contour, and that the retaining rings (3) continue to slide on one in the handle tube (1) stored magazine rod (4) are lined up, which has a conical splayfoot at its lower end (10) owns. 3. Device according to claims 1 and 2, characterized in that on the expanding slide (11) a double-armed actuating lever (20) is articulated on the handle tube (1) is mounted and resiliently supported and is essentially parallel to the handle tube (1) extends. 4. Device according to claims 1 to 3, characterized in that the operating lever (20) has a convex stop (23) at its free end, which when it is reached the spread position (B) of the slide (11) strikes the handle tube (1), and that the operating lever (20) between its spherical stop (23) and its bearing point (21) on the handle tube (1) located articulated joint (24), by the buckling of the expansion slide (11) from its Spread position (B) reaches the delivery position (C). 5. Device according to claims 1 to 4, characterized in that the expanding slide (11) in the handle tube (1) through in its mouth-side, at the same time the expansion plate (13) receiving Recess (14) inserted support plates (17) is guided and on its from the handle tube (1) protruding end (H ') is fork-shaped. 6. Device according to claims 1 to 5, characterized in that the magazine rod (4) is provided with a longitudinal rib (9) aligned with the expanding nose wedge (12 ') of the slide (11), the torsion-free storage of both the locking rings (3) on the magazine rod (4) as also ensures the magazine rod (4) opposite the punch sleeve (2) and the handle tube (1). Documents considered: German utility model No. 1 857 498; French patent specification No. 1 218 360. 1 sheet of drawings 809 627/1068 10.68 ® Bundesdruckerei Berlin