Hose clamp

FIELD: machine building.

SUBSTANCE: hose clamp with a tightening ear 15 on the inner side of a clamping band in the zone touching the hose is provided with a drop-shaped recess 25 counteracting the release of the tightening ear 15 after the hose clamp is tightened.

EFFECT: perfected clamp design.

9 cl, 3 dwg

 

The technical field to which the invention relates.

The invention relates to the hose clamp.

The level of technology

The hose clamps with scooptram tensioning device, the so-called "Oetiker ear"that closes around the perimeter of the hose covering, for example, the pipe by compression "stretch loops, consisting of two shoulder connecting them with a jumper with pliers or pincer tension tool. Depending on the size of hose clamps the inner ends of the shoulders taut almost touching. If the application specified the tightness of the clamp is properly closed, if to achieve a 50%reduction of the diameter of the eye decreased accordingly. The difference between this position and the point at which the inner ends of the shoulders taut almost touching, is a clamping range of the clip.

One of the problems with this type of tightening is that when removing the tension tool is a weakening of the compressed tension of the eye due to the elasticity of the hose and the clamping of the tape. This radiatia causes the reduction applied to the hose torque, which, in extreme cases, can lead to leakage.

Theoretically there is a possibility of restrictions such rasati is through the use of a more rigid or thick clamping of the tape. However, in this case along with higher costs for material usage more rigid and thicker material outside zone stretch eyelet is undesirable, in particular because the hose clamp must have a certain elasticity in order to compensate for non-uniformity of the shape of the hose and covered parts (pipe).

From patent US 5,070,580 known approach in which the tension eyelet increases stick him outside clip from a much more durable material, and when tightening the clamp is crimped together with straining ears. This clip is an additional node, which leads to higher production costs and more complicated Assembly hose clamps. In addition, increased clip tension lug when the rotating parts is causing more imbalance.

Other measures to strengthen the tension of the eye is known from patent US 5,111,555. There is provided a two-layer performance stretch loops and extra amplification using stick on the outside of the clamps or brackets. When this solution is found described disadvantages.

Disclosure of inventions

The basis of the invention is tasked to resolve, at least partially, the drawbacks in the known hose clamps with scooptram tensioner is. A more specific object of the invention is the creation of a hose clip with scooptram tensioning device, the holding force which increases taut.

Special attention should be given to preventing the tendency of the stretched ear to the elastic radiatio after tightening.

The solution to this problem is possible by means of the characteristics of claim 1 of the claims. Provided according to claim 1 of the formula of the invention the recess determines the indentation of the hose material in the recess when the tensioning lug and a corresponding reduction of diameter. The relative displacement occurring when the tensioning loops between the clamping strip and hose, enhances pushing the hose material in the recess, extending in this direction. After removal of the tension tool at the end of the process of tightening begins relative displacement of the clamping belt and hose in the opposite direction. When this is pressed into the recess hose material is displaced in the direction of narrowing the width of the recesses, followed by jamming preventing movement in the opposite direction. Thus, the tension of the ear is not able to decompress as much as you would expect from the effect of elasticity.

The configuration of the recesses, indicated the data in claim 2-4 claims, proved to be particularly effective.

The solution according to claim 5 claims can be called reasonable, because the described relative displacement of the clamping belt and hose is most evident near the tensioner.

Claim 6 of the formula of the invention relates to the application of the decision to open the hose clamp, the ends of which overlap each other overlap, and the tension device is located in this case in the area of the outer end portion, overlapping overlying the inner end of the section.

When such an open hose clamp according to claim 7 claims deepening the best way to cover that part of the inner end portion clamping the ribbon located under tension by ear, because in this zone the relative displacement of the clamping belt and hose strongest. Deformation of the clamping of the tape in place while improving the rigidity that prevents bowing of the clamping of the tape at the clamping ear.

In the development of the present invention in accordance with claim 8 protruding out of the recess in combination with straining eye can provide additional fixation of the clamping of the tape under tension by ear. This function can be used in particular in those cases when the tension of a needle according to claim 9 provided with a speaker inside (in the bent) bead rigidity.

Brief description of drawings

Below on the basis of the drawing provides a more detailed explanation of the example of execution of the invention. On

figure 1 presents a side view of the open hose clamps to the state of the assembled state in which both ends of the clamping of the tape overlap overlap and are fixed to each other, and stretch the ear is not yet fastened,

2 is a top view of the inner end portion clamping the tape according to figure 1 and

3 is an enlarged image of a longitudinal section of the inner end portion clamping the tape.

The implementation of the invention

Shown in the drawing outdoor hose clamp consists of clamping the tape 10, forming depicted in figure 1 the inner end portion 11 and overlying the outer end section 12. On the outer end section 12, when viewed in the direction from that shown in figure 1 the right end, are made of cold-forming slot 13 under the guide hook, socket 14 for fixing the hook, the tension device 15 in the form of so-called "Oetiker ear" and the guide 16 of the tongue. It is also depicted on figure 2 and 3 the inner end of the clamping portion 11 of the tape 10, when viewed in the direction of its free end, the tongue 17 is reduced compared to clamping the tape 10 by the width and the guide 18, the recess 19 with the top view in figure 2 teardrop-shaped, the locking hook 20 and the guide hook 21.

The tension lug 15 is formed with two shoulder 22, made of curved outward clamping of the tape 10, and a connecting crosspiece 23. In the crosspiece 23 is formed concave (speaker inside) crimp rigidity 24.

With the exception of the notches 19 hose clamp of this example, the performance can match the hose clamp is known from the patent WO 2009/152832 A1.

In this example of execution of the recess 19 according to figure 2 has the shape of a drop, "falling" from the inner end of the clamping of the tape towards the middle of the clamping of the tape, i.e. the width, measured perpendicular to the longitudinal direction of the clamping of the tape 10, tapering from alleged in figure 2 to the right of the middle of the clamping of the tape toward the left end of the clamping strip, with both ends rounded. The depth of the formed recess 19, concave in the direction of the inner side of the clamping strip recesses 25, corresponds essentially to the thickness of the clamping belt 10, i.e. the height of the notches 19 according to the image of figure 3 with the outer side of the inner end portion 11 corresponds approximately to the thickness of the clamping of the tape.

The largest width of the recess 25 corresponds to approximately 1/2 the width of the clamping band, and the smallest is approximately 1/10 to 1/5 of the width. As VI is but figure 3, the inner wall of the recess 25 C is shown in figure 3 right side detects smoothly beveled edge of runway 26, and the opposite end is sharply beveled edge rundown 27.

As shown in figure 1, the dimensions of the corrugations of rigidity 24, located on the crosspiece 23 of the tension lugs 15 can be selected so that it shows the state of contact with the notch 19. In this case, the tension lug 15 provided with a notch 19 zone counteracts bending the clamping of the tape 10.

Compression tension eyelet 15 is shown in figure 1 is the initial position, for example, by means (not shown) ticks, exciting both of the shoulder 22, the diameter of the hose clamps is reduced, resulting in pressure (not shown) hose, located between the clamping strip 10 and covered them with detail, such as a pipe. By decreasing the diameter of the hose clamps at the same time, the relative displacement of the clamping of the tape 10 and the hose, most strongly expressed in the zone of tension loops 15 and decreasing as it approaches the middle of the clamping strip, i.e. in the direction of a zone diametrically opposite the tension eyelet 15. Exerted on the pressure hose and the above relative displacement causes the indentation hose material in the recess 25.

After removal of ticks due to the elasticity of the lang and the tension lug 15, subjected to, in essence, inelastic deformation occurs, some of radiatia stretch eyelet 15. Between the hose and the clamping strip 10 opposite occurs relative offset, which is pressed into the recess 25 of the hose material is displaced in the direction of tapering recesses 25 and subsequent jamming. This jamming limits the extent of wound tension lug 15, which without it would be stronger.

During closing of the beveled edge of runway 26 of the recess 25, is shown in figure 3 on the right, gives compressible hose material able to smoothly pushed in the closing direction, thereby preventing the braking in the process of closing loops. When removing ticks and starting with this elastic rasathi stretch eyelet 15 more sharply beveled edge rundown 27 located on the side of a narrower and perhaps more deep end of the recess 25, in contrast, increases compressive and inhibiting the action of compressed hose material.

On the hose clamp nominal diameter of 60 mm, a width of the clamp 10 mm, thickness 0.8 mm tape and measured by the perimeter length of the stretch eyelet 15 13 mm were tested with a closing force of ticks in the 6400 H. On the hose clamp with a recess 25 after removing ticks measured the average length formed under tension lug 15 butt gap with the Tawil 3,03 mm, the total radial force provided hose clamp on the hose, was 4400 H, the average unit pressure at 2.45 N/mm2. When determining the total radial forces using eight sensors placed evenly around the perimeter, as measured by the average force was 550 H.

On the hose clamp without deepening of 25, but with the same other dimensions and under the same conditions measured the average length of the trailing gap amounted to 3.25 mm, the average radial force amounted to 3840 H, the average specific pressure - 2,17 N/mm2. Relative to the radial force exerted hose clamp after removing the tick, this corresponds to an increase of 14%.

This improvement means that to achieve the required tightness in many cases, the commonly used stainless steel can be replaced by a cheaper grade of steel. Due to the fact that when using hose clamps of this type of material costs constitute up to 85% of the total costs resulting from the invention increase retention efforts allows us to achieve very significant savings.

Instead of the above-described tear-shaped recess 25 can, in principle, to have, for example, a triangular shape with rounded edges, and the width of the recesses is always decreasing from the middle zainoulline in the direction of the inner end of the recess.

Above the location of the recesses 25 under tension lug 15 in the area of the inner end portion clamping the tape 11 must be considered the most appropriate effect of the stated reasons. However, the recess can be, in principle, and in other places the clamping of the tape 10, for example in the area of the outer end portion 12 adjacent to the hose. As the relative displacement of the hose and clamping the tape 10 is felt strongest in the area of tension lug 15, it is advisable to place the recess 25, at least next to him.

For a list of symbols

10the clamping tape
11inner tail section
12the outer end section
13the nest under the guide hook
14the slot for fixing the hook
15stretch eyelet
16guide reed
17reed
18 guide
19notch
20latch hook
21the guide hook
22shouldered
23plot jumpers
24crimp rigidity
25deepening
26the beveled edge of the runway
27beveled edge rundown

1. Hose clamp with the clamping strip (10), which is made ukoobraznye tensioning device (15) with two protruding outward shoulder (22) and connecting them by a crosspiece (23), and the clamping strip (10) with its inner side on the plot adjacent taut to the hose contains a recess (25), the edges of which are located entirely inside the clamping strip (10), characterized in that the width of the recess (25) tapering in the direction from the measured in the longitudinal direction of the middle of the clamping of the tape.

2. Hose clamp according to claim 1, characterized in that the recess (25) has the form of leaning is towards the middle of the clamping of the tape drops.

3. Hose clamp according to claim 1 or 2, characterized in that the inner wall of the recess (25) from the wide end is smoothly beveled shape, and from the narrow end is sharply beveled shape.

4. Hose clamp according to claim 1 or 2 characterized in that the recess (25) from the narrow end has a greater depth than that of the wide end.

5. Hose clamp according to claim 1 or 2 characterized in that the recess (25) is located near tensioning device (15).

6. Hose clamp according to claim 1 or 2, characterized in that the ends of the clamping strip (10) in the assembled state form the internal end section (11) and overlying the outer end section (12), and the tensioning device (15) is located in the zone of the outer end portion (12), overlap overlying the inner end section (11).

7. Hose clamp according to claim 6, characterized in that the recess (25) is located on that part of the clamping strip (10), which covers available in an assembled condition, the clamping of the tape, the distance between the shoulder (22) of the tensioning device (15).

8. Hose clamp according to claim 7, characterized in that the recess (25) made in the form of protruding from the outer side of the clamping strip (10) of the recess (19).

9. Hose clamp of claim 8, characterized in that the crosspiece (23) scoobysnack tensioning device (15) is amplified speakers inside corrugated is (24).



 

Same patents:

Hose clamp // 2450201

FIELD: machine building.

SUBSTANCE: connection of two ends of the tape is done by a guide hook located on the internal side of the tape and inserted into a socket designed for the guide hook and located on the external side of the tape and a locking hook also located on the internal side of the tape and inserted into the socket designed for the locking hook and located on the external side of the tape. The socket designed for the locking hook is a depressed pocket achieved by cold pressing of a metal strip, and forming a unified whole with it around its perimetre. The internal surface of the socket is perpendicular to the tape surface in the support area adjacent to the outer end of the tape. The locking hook has a projection directed to the side opposite to the internal end of the tape, which when the hose clamp is pulled engages its sheared edge with the support area of the socket designed for a locking hook.

EFFECT: due to the fact that its design is integral with the metal strip, the socket for the locking hook has a much greater strength.

9 cl, 3 dwg

Hose clamp // 2450201

FIELD: machine building.

SUBSTANCE: connection of two ends of the tape is done by a guide hook located on the internal side of the tape and inserted into a socket designed for the guide hook and located on the external side of the tape and a locking hook also located on the internal side of the tape and inserted into the socket designed for the locking hook and located on the external side of the tape. The socket designed for the locking hook is a depressed pocket achieved by cold pressing of a metal strip, and forming a unified whole with it around its perimetre. The internal surface of the socket is perpendicular to the tape surface in the support area adjacent to the outer end of the tape. The locking hook has a projection directed to the side opposite to the internal end of the tape, which when the hose clamp is pulled engages its sheared edge with the support area of the socket designed for a locking hook.

EFFECT: due to the fact that its design is integral with the metal strip, the socket for the locking hook has a much greater strength.

9 cl, 3 dwg

Hose clamp // 2522703

FIELD: machine building.

SUBSTANCE: hose clamp with a tightening ear 15 on the inner side of a clamping band in the zone touching the hose is provided with a drop-shaped recess 25 counteracting the release of the tightening ear 15 after the hose clamp is tightened.

EFFECT: perfected clamp design.

9 cl, 3 dwg

Hose clamp // 2599883

FIELD: manufacturing technology.

SUBSTANCE: invention relates to hose clamps. Open hose clamp has a clamping device of the so-called "Oetiker" eye shape. Closed state is locked by means of gear zones, which are engaged with each other outside the eye area on the opposite from the outer end of the clamping strip side of the eye.

EFFECT: in the locked state the eye is free from the load, so that the hose clamp keeps its clamping function even if the eye extending outward is damaged.

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Hose clamp // 2628252

FIELD: machine engineering.

SUBSTANCE: open hose clamp is provided with an eyelet tensioner. The tightened state is fixed by the geared portions 15, 23, which are engaged with each other outside the tab area and on the side of the tab 24 facing away from the outer end of the clamping band. In the fixed state, the eye does not experience any effort. Thus, even damage to the outwardly projecting eyelet 24 does not result in the loss of the clamping function of the hose clamp.

EFFECT: width of the clamping belt in the ear area is reduced compared to the other full-width areas.

5 cl, 4 dwg

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