HU214387B - Safety cover - Google Patents

Abstract

An object of the invention is a protective tongue. The recommended protective cylindrical cylindrical part, especially in the case of the disc brake disc, can be used with the clamp. The essence of the protective barrier according to the invention, i.e. the end of the climbing end, is provided with an annular rim (74) at the end of the annular end, which in its axially outwardly directed portion (77) has a large curvature curve (77 '), while in its axially inwardly directed portion (76) a smaller curvature curve. (76 '). The invention also relates to a pivoting or damping sleeve which can be used as a slider-seat disc brake. In fact, the damping or guiding element (29) is provided with a one-piece folding sealing sleeve (50) from the rabbit (27) on the forefront of the ridge. It is also an object of the present invention to provide a shoulder procedure which is used to fasten a sealing sleeve fastened to a saddle-stack to a threaded annular ring. The core of the process, thermally the housing 2), is guided by the ring (78) on the threaded rod (21, 22, 23), while the flange (74) of the sealing sleeve (50), the so-called exhaust sleeve (50), is preferably guided by a cone (82). ) slid in the direction of the shank (81), which is slidably engaging - locked - behind the shaft (81). ŕ

Description

The scope of the description is 10 pages (including 3 sheets)

EN 214 387

FIELD OF THE INVENTION The present invention relates to a protective cover for cylindrical parts, in particular a drive part brake disc, with an elastically foldable sealing sleeve, the first end portion of which may be attached to a periphery of a housing, and a second end portion thereof on the circumference of a pin, and a ring for a second end portion having a substantially radial projection. The ring is firmly attached to the pin and the second end portion of the foldable sealing arm is partially over the ring.

A damping sleeve is described in DE-OS 34 12 543. The damping sleeve consists of two parts, i.e. an elastic damping or guiding member and a docking member which is formally connected thereto. The elastic guide member has a substantially cylindrical core body provided with protrusions between which the stop member is positioned. The guide member rests on a guide pin in the bore of the saddle housing and extends from the bore on one side with a longer axial projection, on the other side of the bore, an axially shorter extension. Dirt can penetrate into the hole, between the damping sleeve and the guide pin, in a place with a short extension.

DE-OS 35 14 497 discloses a shielded conductor in which the end portion of the shield is embedded in a substantially U-shaped metal ring. The ring and the sealing sleeve are joined by hand.

It is an object of the present invention to provide an improved final section of a protective cover which is easier to fix and / or easier to fix in a ring mounted on a threaded pin. A further task is to improve the damping sleeve in such a way that dirt can be kept away from the hole and the intermediate space between the damping sleeve and the guide pin. However, the damping sleeve must be easy to produce.

The object of the present invention is to provide the second end portion of the folding sealing sleeve at its annular end with an annular flange having a large radius of curvature in its axially outward direction and a smaller radius of curvature in its axially inward direction. Thus, the sealing sleeve has a cam shaped cross-sectional flange, where this flange, due to the shape of the cam, jumps over the radially protruding stem of the T-shaped ring and the section formed by the smaller radius of curvature is releasably snapped behind the stem.

The flange is preferably expandable and extensible, so that the sealing sleeve with its folds pushes the second end portion or the flange of the flange with a larger radius of curvature over the radially extending stem. Meanwhile, the flange jumps over the radially protruding stem and is releasably latched behind the stem. When the house is moved backwards from the ring, the cam-shaped end rotates in the ring, so that the section with a smaller radius of curvature rests in a radially protruding stem and sleeve in the radially extending stem and sleeve.

Advantageously, the radially extending stem is provided with a conical portion, a cone that serves as a guide slope and expands the rim, so that the flange can simply slip over this stem in this cone to snap behind the stem, snap.

It is also preferred that the sealing sleeve is provided with a plurality of radial folds, shafts having a smaller radially outer diameter closest to the end than the following, so that the axial folds of the sealing sleeve do not allow axially extending the axial folds of the shaft. over the end of the pin, preventing the sealing sleeve from being cut and damaged.

The simplicity of assembly is facilitated by the fact that the flange base, which presses the edge in the axial direction, has a circumferential edge in the form of a ring. This edge acts as a second guide slope and extends under the flange, so it is assisted by a "flap" in its movement over the radially extending extension.

The foldable sealing sleeve is preferably formed in one piece with the pin guide sleeve, so that only one component provides both anti-dirt protection function and damping centering between the housing and the brake holder.

It is also advantageous to have a disc mounted on the threaded side of the conduit, i.e. the part in which the brake is applied to the joint shaft stem, which strikes both the metal ring and the larger diameter of the conduit.

If the ring is in the H-shape with a second radially positioned stem, the sealing sleeve is preferably protected against heat from the brake disc, as well as damage to the brake holder and the brake housing.

Further tasks can also be accomplished by forming the damping sleeve in one piece with the sealing sleeve on the side of the damping shaft toward the shaft or the shaft shaft, i.e. in the shortitudinal direction of the shaft.

Preferably, the sealing sleeve has a free end which engages sealingly in a ring-shaped cavity designed for this purpose, preferably in the form of a groove in the guide pin. This arrangement makes it possible to prevent contamination between the guide pin and the damping sleeve. In addition, the damping sleeve is preferably formed in one piece, which reduces production costs.

In order to allow movement between the damping sleeve and the guide pin, the foldable sealing sleeve is preferably provided with a plurality of curved projections. Thus, it is ensured that the end of the sealing sleeve is retained in the groove designed for this purpose even when the guide pin is moved relative to the sleeve.

In one embodiment of the invention, this end is a cross-sectional thickening. This circular cross section can be made of rubber to produce such damping sleeves.

The foldable sealing sleeve is radially2

HU 214 starts at 387 Β so that when the relative movement between the stud and the saddle is preferably in a radially sealing manner, the housing protrusion does not protrude from the housing and thus the dirt cannot penetrate.

The damping sleeve is provided with an outer circumferential groove into which the saddle or braking support engages. Preferably, the lateral surfaces of the damping or guiding element delimiting the groove are sealed against the saddle or the brake holder so that the contamination cannot penetrate.

Preferably, the brake holder is also formed as a part of the shaft stem and a shaft shaft connected thereto.

It has been shown that the function of the pin guide or damping sleeve can be further improved if the wall thickness of the section of the damping or guiding element in the intermediate spaces of the stop element is substantially equal to or less than the radial height of the extensions and the inner member of the damping member. diameter greater than the inside diameter of the part of the damping or guiding element adjacent to the stop member. In other words, the part of the damping or guiding element between the protrusions of the stop member should not extend radially beyond the projections, so that the projections in this environment can be unobstructed and directly in contact with the inner wall of the hole. Approximately approx. The game remains 0.3 mm. Thus, the support body can advantageously take the radial support forces apart from the elastic damping or guide element without affecting it. On the other hand, the damping or guiding element I separated from the stop member can be radially damped and sealed without being influenced. The full thickness of the elastic damping or guiding element is available for damping.

In a preferred embodiment, the base member of the stop member is axially longer than the projections or projections. In this way, an annular shoulder is formed which supports the stop member radially against the damping member in the entire circumferential region. In another embodiment of the invention, radially outward projections on the damping or guiding elements extending radially beyond the outer boundary surface of the section arranged in the intermediate spaces are radially outwardly spaced. Preferably, these projections are annular and spaced axially on both sides of the section arranged in the intermediate spaces. By means of these projections, the damping sleeve and the threaded bolt can preferably be centered relative to the saddle housing.

The invention will now be described in more detail with reference to the accompanying drawings, in which:

Figure 1 is a side elevational view of a floating base particle disc brake with a retaining screw;

Figure 2 is a side elevation view of the same float-plate disc brake with a guide screw;

Figure 3 is a longitudinal sectional view of a damping sleeve;

Figure 4 is a cross-sectional view of the same damping sleeve;

Figure 5 shows the sealing sleeve of the damping sleeve or guard;

Figure 6 shows a U-shaped ring;

Figure 7 shows a mounting phase when the folding sealing sleeve is inserted into the ring; finally

Figure 8 shows the particle disc brake with the foldable sealing sleeve.

In Figures 1 and 2, the insert disc brake 1 is shown with a saddle housing 2 having an outer stem 3, an inner stem 4 and a bridge portion 5. In the shaft 6, the brake shoes 7, 8 are guided, having 9.10 support plates and 11, 12 friction pads. The brake shoes 7, 8 can be moved axially on two pins 13 '. The inner stem 4 comprises an actuator comprising a piston 13 and a cylinder 14; which moves the inner brake shoe 7 directly and the outer brake shoe 8 indirectly towards the brake disc by means of the outer shank 3. The two electric conductors 15, 16 whose ends extend into the friction pads 11,12 are used to indicate the wear of the friction pad. The brake shoe 7, 8 is held by a retaining spring 17 in the shaft 6 without ringing. When braking, the saddle 2 slides on the threaded pin 18, which consists of a 19 sleeve and 20 screws. The screw 20 is screwed into a shaft shaft, not shown, or into a brake holder. In the circumferential direction, a guide pin 21 is disposed at a distance from the threaded bolt 18. The threaded pin 18 is mainly used for picking up the peripheral force, and the guide pin 21 prevents the pivot pin 18 from turning or tilting. This guide pin 21 has a second holding pin 22 and a second screw 23. A protective cover 24, also referred to as a damping sleeve, encircles the support sleeve 22 in the casing and is located in the bore 25 of the saddle 2. The screw 23 is tightly screwed into the shaft shaft, and the bracket 22 with its screw head 28 pushes the support sleeve 22 against the shaft number and the brake holder. A shield 26 is provided on the axial projection 27 of the damping sleeve 24 and closes the damping sleeve 24 on the side of the screw head 28. The folding sealing sleeve 50 of the damping sleeve 24 extends into the groove 56 of the support sleeve 22.

Figures 3 and 4 show the damping sleeve 24. The damping sleeve 24, which guides the threaded pin, consists of two parts, namely an elastic damping or guiding member 29, and a stop member 30 which is connected therewith. The elastic damping or guiding member 29 consists essentially of a cylindrical base body 31 with an axial projection 27 and an axial junction 31 '. The projection 27 and the connector 31 'form a radial projection 32, 33. The base body 31 has two circumferential projecting protrusions 32, 33 extending radially apart, spaced apart from each other, which are only slightly, e.g. 0.15 mm above the diameter of the part between them. With these projections 32, 33, the pin guide 24 and the damping sleeve 24 are placed in contact with the surface 34, 35 of the saddle house 25 defining the bore. The base body 31 is provided with radially inwardly projecting, oblong edges 36, 37, 38, the blunt edges 36 and 37 being mounted on the guide pin 21 passing through the bore 25 when mounted.

EN 214 387

A stop member 30 is provided in the region between the protrusion 32 and 33 for the elastic damping or guiding element 29. This stop member 30 also has a substantially cylindrical second base body 39 provided with a plurality of elongated protruding projections extending radially outward, of which only the mark 40 is shown in the drawing. The position and magnitude of the projections 40 are preferably chosen so that more ribs are always used at the load, so that large bearing forces can be taken without significant deformation, and there is still a sufficient space between the protrusions for the elastic material of the damping or guiding element 29. to provide sufficient strength for the complete damping sleeve. The inner diameter of the hollow cylindrical body body 39 of the stopper 30 is chosen to allow a small play for the guide pin within it, e.g. With a 13 mm diameter pin, this radial play can be 0.3 mm. Thus, it is ensured that normally only the guide member 29 contacts the guide pin. In the elastic damping or guiding element 29, between the protrusions 32 and 33, a plurality of projections 41 are provided, corresponding to the number of projections 40. These projections 41 include projections 40 of the impact element 30. To this end, the projections 41 have contour lines fitting to the projections 40 so that the projections 40 are tightly surrounded by the material of the elastic damping or guiding element 29. Since the cylindrical body 39 of the stop member 30 is slightly longer in axial direction than the projections 40, shoulder 42 and 43 are formed in the transition phase between the base body 39 and the projections. According to the shoulder 42 and 43, there are further shoulder members 44,45 at the ends of the damping or guiding means 41 so that the shoulder members 42, 43 of the stop member 30 are retained in the mounted state. The wall thickness of the portion of the damping or guiding member 29 disposed in the intermediate spaces of the stopper 30 is substantially equal to or slightly less than the radial height of the projections. In other words, the elastic damping or guiding element in the vicinity of the projections 40 does not extend too radially on the projections. In addition, the same or smaller diameter range is preferably longer in the axial direction than the region of the projections. Attached to this range are annular radial projections 46, 47 on both sides of the damping element 29. These radial projections 46, 47 are only slightly larger in diameter than the part between the projections, e.g. With a diameter of 20 mm, the diameter of the damping element is 0.3 mm. On the projections 46, 47, the saddle 2 rests without touching the stop member 30. The stop member 30 is preferably made of a glass fiber reinforced, high-strength, heat-resistant thermoplastic plastic. In addition, the radial edge layer of the stop member 30, including the projections 40, is glass-free. The production is done by splashing the stop member with the damping element 29.

The guide member 29 is provided with radially inwardly protruding projections 48, 49 with cylindrical surfaces 48 'and 49', and has annular edges 36, 37 which are annularly formed on the pin 21 and are punctured in a damping manner. The blunt edge 38 of the projection 27 serves to secure the protective cover 26 axially. The damping member 29 is formed in one piece with the sealing sleeve 50 on the side facing the brake support or shaft shaft, sealingly engaging in the annular groove 56 of the stud 21 in the annular circumference at its end. The sealing sleeve 50 is provided with a plurality of three radial folds 51, 52 and 53. The closure 53 closest to the cylindrical body 31 begins radially inwardly on a radially spaced portion 57 having an edge 57 '. Thickening 55 at the end 54 of the sealing sleeve 50 has a circular cross section. Each of the folds 51, 52 and 53 has an inner diameter 60 and an outer diameter 61, wherein the inner diameter 60 is greater than the inner diameter 58 of the projection 48, and the outer diameter 61 is less than the outer diameter 59 of the projection 32. Thus, it is ensured that in the rest state, the drive or fold base 62 of the sealing sleeve 50 does not friction on the pin, and on the other hand, the fold or fold heights 63 do not scratch the saddle housing.

Fig. 5 shows the sealing sleeve 50 of the protective cover 24 with the folds 51, 52 and 53 of the bellows, or with the folds. Each of the folds 51, 52 and 53 has two 64.65,66,67 and 68,69 fold walls substantially radially located. There is a circumferential edge 71 in the form of an annular circumferential base 70 between the walls 65,66 of the flap 51,52, the surfaces of which are circa. 70 ° 72 angle. The edge 71 extends with the tip at a second, approx. It shows an angle of 35 ° to the central axis 94 of the damping sleeve 24, and thus extends in the shape of a cam, circularly circumferentially extending 74 in the cross section of the sealing sleeve. The bulge 74 has a first, small curvature radius 75 'in the first 75 opposite the wall 65, which is approx. 0.2 mm, and a second radius of curvature 76 'in the second section toward the center axis 94, which is approx. 0.7 mm, while a third 77, outwardly spaced 77, has a radius of curvature of 77 ', which is approx. 1.1 mm. The folds 63 of the folds 52, 53 have the same 59 outer diameters as the projection 32. The diameter of the fold-off height 61 of the outer shroud 51 is smaller than the diameter 59. The guard 24 has a folded sealing sleeve 50, the first end portion 29 of which is formed as a damping member 29, and the second end portion is formed by the folds 51.52 and 53 and the thickening 55.

Figure 6 shows a T-shaped metal ring 78 with a radially protruding protrusion 81 or stem 81 formed by the first stem T, hereinafter referred to as an extension, and a sleeve-shaped section 79 formed by the second stem T, hereinafter referred to as a sleeve. called. A radially spaced shaft 80, which may also be referred to as a extension, becomes a metal ring 78 in the H-shape. The stem 80 extends radially further than the stem 81. The ring 78 has a sloping cone 82 which has turned away from the stem 80

HU 214 is on 387 Β on the stem 81. The cone 82 ends at the outer tip 83 in a radially positioned surface 84. The sleeve 79, as well as the shank 80 and 81, define 85 extrusion.

Figure 7 shows the automatic assembly where the bulge 74 or flange 74 slides onto the cone 82 and is fastened behind the stem 81. Here, the ring 78 is rigidly connected to the guide pin 21. The saddle 2 slides over this 21 pin while carrying the damping sleeve 24 with it. The sealing sleeve 50 is compressed axially and the flange 74 and the folds 62, 70 remain in their position on the pin 21 until the tip 83 of the ring 78, the flange 74 and the folds 62, 70 coincide axially to each other. The flange 74 is moved radially outward by the shear of the tip 83 and the edge 71 and slides high over the cone 82. Meanwhile, the largest radius 77 lies on the tip 83 and draws the axially positioned surface 84 onto the conical portion 83 of the shank 81. When the ring 78 and the damping sleeve 24 are further pressed, the shrink base 70 slides over the cone 82 until the flange 74 is unlocked behind the shank 81. When the saddle house 2 moves backward, the flange 74 rotates in the groove 85 of the ring 78 and, with its smaller radius, is applied to the axially positioned surface 86 and the peripheral surface 87 of the sleeve 79. Here, the movement of the fold wall 64 and the flange 74 was drawn by a dotted line. A special flange shape with a larger radius of curvature and a smaller radius of curvature, as well as a sharp corner on the flap adjacent to the flange 74, and a slope on the ring 78 made of a shield plate, provide automatic assembly of the damping sleeve.

Fig. 8 shows the particle disc brake 1 with the sealing sleeve 50 which engages with the rim 74 to punch the ring 85. The ring 78 is supported by the disc 88, which is supported by both the bushing 22 and the ring 78, until the bushing 89, 90 is aligned axially to the same height.

Claims (18)

PATENT CLAIMS 1. A shield for cylindrical parts, in particular a paddle disc guide pin, with an elastic folding sealing collar having a first end portion secured to a circumference of a housing, a second end portion secured to a circumference of a pin, and having an annular annular ring wherein the ring is firmly mounted on the pin and the second end portion of the collapsible sealing collar is partially uppermost on the ring, wherein the second end portion is provided with an annular flange (74) at its lateral end extending axially outwardly (77). has a large radius of curvature (77 '), and a smaller radius of curvature (76') in the axially inwardly directed section (76). A protective cover as claimed in claim 1, characterized in that the flange (74) is expandable and extensible, and in that the portion (77 ') of greater radius of curvature (77') extends through the radial projection (81) of the ring (78). (78) can be pushed onto the sleeve-shaped portion (79). A protective cover according to claim 1, characterized in that the radial projection (81) is provided with a cone (82) on its side, which is rotated away from the sleeve-shaped section (79). 4. Protective shroud according to any one of claims 1 to 3, characterized in that the second end section of the folding sealing collar (50) has a plurality of radially folded folds (51, 52, 53), of which the closure (51) closest to the flange (74) has a smaller outer diameter (51). 59, 61) as the fold after the first end (52). 5. A protective cover according to any one of claims 1 to 4, characterized in that the fold (70) adjacent to the flange (74) has an edge (71) extending below the flange (74). 6. A protective cover according to any one of claims 1 to 4, characterized in that the first end section of the folding sealing collar (50) is designed as a tap guide damping sleeve (24). 7. A protective cover according to any one of claims 1 to 6, characterized in that the sleeve-shaped portion (79) of the ring (78) contacts a disc (88) with its side turned away from the foldable sealing sleeve (50). 8. A protective cover as claimed in any one of claims 1 to 4, characterized in that the ring (78) has a second radially extending annular shank (80). 9. Tap guide or damping sleeve for a floating-disc brake caliper housing having a brake support and an axially displaceable saddle housing surrounding the brake disc and brake shoe, wherein the brake support or saddle housing comprises at least one threaded pin, , an elastic damping and guiding member in the bore for the threaded pin, and a solid stopper for restricting the radial movement of the threaded pin within the bore, with a substantially circular cross-sectional body having protrusions extending outwardly to form buffer surfaces, and outside of a section of the guide member extends into the intermediate spaces formed between the projections and the damping member or guide member has an axial projection outside the bore surrounding the threaded pin, in particular the preceding claims. characterized in that the damping or guide member (29) is provided with a one-piece collapsible sealing collar (50) on the opposite side of the projection (27). Pipe guide or damping sleeve according to claim 9, characterized in that, with the free end (54) of the folding sealing sleeve (50), the threaded pin (18,21) is annularly formed in a ring-shaped groove (56). stretching into it. The tap guide or damping sleeve according to claim 9 or 10, characterized in that The foldable sealing sleeve (50) comprises a plurality of radially folded folds (51, 52, 53). 12. A 9-11. A tap guide or damping sleeve according to any one of claims 1 to 3, characterized in that the free end (54) of the collapsible sealing collar (50) has a circular cross-section (55). 13. A 9-12. Pipe guide or damping sleeve according to any one of claims 1 to 4, characterized in that the folding sealing sleeve (50) engages the radially inwardly facing edge (57 ') of the damping or guide member towards the threaded stud. 14. A 9-13. Pipe guide or damping sleeve according to any one of claims 1 to 4, characterized in that the damping or guide element (29) forms a groove by two radially extending annular projections (32, 33) and a disc-shaped surface defining said groove. the two ends of the hole (25) being sealed against the surfaces (34, 35) delimiting the hole (25). 15. A 9-14. Pipe guide or damping sleeve according to any one of claims 1 to 4, characterized in that the wall thickness of the section of the damping or guide element (29) located in the intermediate spaces of the stop element (30) is substantially equal to or less than the radial height of the projections (40). and that the inner diameter of the stop member (30) is larger than the inside diameter of the damping or guide member (29) adjacent to the stop member (30). 16. The tap guide or damping sleeve according to any one of claims 1 to 3, characterized in that the base body (39) of the stop member (30) is axially longer than the projections (40). 17. 9-16. Pipe guide or damping sleeve according to any one of claims 1 to 4, characterized in that the damping or guide element (29) has radially projecting annular projections (48,49) outwardly of the section in the intermediate spaces and extending radially on the outer boundary surfaces of the section in the intermediate spaces. they are ahead. A method of securing a sealing collar (50) mounted on a saddle housing (2) to a recess (85) in a ring (78) seated on a threaded pin (21, 22, 23), wherein the ring (78) is substantially T-shaped in a longitudinal section. with an annular ring (81) forming one of the legs T, characterized in that the housing (2) is guided on the threaded pins (21, 22, 23) in the direction of the ring (78) while the sealing collar (50) is pressed, then sliding the flange (74) of the sealing collar (50) onto the radially extending shank (81), preferably formed by a guide cone (82), and then releasably snap-locking it behind the shank (81).