Hose coupling and fluid element

Abstract

The invention relates to a hose coupling (100) for coupling a fluid hose to a fluid element, comprising a base body (110) which is penetrated along a longitudinal axis (301) by a recess in which a sealing groove is formed, and which has a circumferential support surface on which a toothed ring partially rests, the toothed ring having several radially inwardly projecting teeth designed to engage on an outer surface of the fluid hose, as well as a sealing ring received in the sealing groove, and an actuating sleeve (130) which is linearly movably received in the base body (110), which has a first end region projecting from the base body (110), and which has a second end region with an external conical surface opposite the first end region, wherein the conical surface is tapered conically with increasing distance from the first end region and bears against the teeth.wherein the first end region has a radially outwardly projecting ring collar (142).

Description

[0001] The invention relates to a hose coupling for coupling a fluid hose with a fluid element and a fluid element with such a hose coupling.

[0002] Fluid hoses are used to transport working fluids, especially gaseous fluids such as compressed air, to a fluid element, particularly a fluid actuator, fluid valve, or fluid consumer. For example, a compressed air source can be connected to a pneumatic valve using such a fluid hose. To connect the fluid hose to the fluid element, a hose coupling attached to the fluid element is often used, enabling tool-free coupling and uncoupling of the fluid hose.

[0003] DE 696 09 740 T2 discloses a device for quickly connecting a pipe to a rigid element in the form of a cartridge that can be inserted into a cylindrical receptacle, comprising a tubular insert which has external anchoring means for its anchoring in the receptacle and internal retaining means for holding the pipe, and a seal, wherein the tubular insert has a nose with an outer diameter that is smaller than the outer diameter of the anchoring means of the tubular insert, and a protective ring with an inner diameter that is slightly larger than the outer diameter of the nose, wherein this ring is mounted on the free end of the nose and is axially fixed relative to this nose by means of a locking means with low resistance in a position projecting axially relative to this nose in order to accommodate the seal internally.

[0004] DE 10 2010 008 926 A1 discloses a connection device for a fluid line, comprising a housing body with a connection section through which a recess is penetrated. Within the connection section is a retaining element for securing the fluid line, to which an axially movable release sleeve is associated. The release sleeve, together with a protective sleeve fixed to it by snapping, forms a single, displaceable protective and release unit that overlaps the outer circumference of the connection section (14).

[0005] The object of the present invention is to provide a hose coupling that enables reliable coupling of a fluid hose to a fluid element even under harsh operating conditions.

[0006] The problem is solved by a hose coupling with the following features: A hose coupling according to the invention for coupling a fluid hose with a fluid element has a base body which is penetrated along a longitudinal axis by a recess in which a sealing groove is formed, and which has a circumferential support surface on which a toothed ring rests in certain areas, the toothed ring having several radially inwardly projecting teeth which are designed to engage on an outside of the fluid hose.Furthermore, the hose coupling comprises a sealing ring received in the sealing groove, and an actuating sleeve which is linearly movable in the base body, which has a first end region projecting from the base body, and which has a second end region with an external conical surface opposite the first end region, wherein the conical surface is tapered conically with increasing distance from the first end region and rests against the teeth, wherein the first end region has a radially outwardly projecting annular collar, wherein the annular collar has an end face facing away from the base body, wherein a protective ring is fixed to the annular collar which covers the end face at least partially, wherein the protective ring has a hook which engages the annular collar and is integrally formed on the protective ring.

[0007] A fluid hose is an element primarily used for conveying or transporting a working fluid, such as compressed air. Preferably, the fluid hose is made of a flexible plastic material and is bendable to simplify installation and adapt to various installation situations. The fluid hose serves to transport the working fluid between a fluid source and the fluid element. Preferably, the fluid hose is capable of withstanding a fluid pressure higher than the ambient pressure, for example, from 2 bar to 20 bar.

[0008] The fluid element can be, for example, another fluid hose or a fluid valve or a fluid consumer, in particular a fluid actuator.

[0009] The recess in the base body can be designed as a bore. Alternatively, the recess can be incorporated during the initial shaping of the base body, for example, during the manufacturing of the base body using a plastic injection molding process. The recess is designed to receive an end section of the fluid hose, with the orientation of the fluid hose in the hose coupling corresponding to the direction of extension of the recess. For this purpose, the fluid hose is inserted into a first opening of the recess facing away from the fluid element.

[0010] A sealing groove is formed in the recess, in which a sealing ring is received. For coupling, the fluid hose is inserted into the recess at least far enough that it protrudes beyond the sealing groove. The sealing ring is designed to simultaneously seal against the fluid hose and the base body. This prevents any working fluid exiting the base body from the fluid hose at the first opening of the recess. The sealing ring can be made, for example, of a synthetic material, in particular a synthetic rubber such as ethylene propylene diene monomer or acrylonitrile butadiene rubber. Preferably, the sealing ring is designed as a lip seal. Alternatively, the sealing ring can have a round, in particular a circular, cross-sectional area.

[0011] The base body has a circumferential support surface within the recess. This support surface is preferably oriented as an axial end face transverse to the longitudinal axis of the recess. This supports the toothed ring resting on the support surface, for example, when the fluid hose is inserted into the hose coupling, and prevents displacement of the toothed ring along the longitudinal axis. Preferably, the support surface is implemented as part of a radial groove in the recess, so that a retaining surface opposite the support surface, with respect to the longitudinal axis, is associated with it. This retaining surface prevents displacement of the toothed ring along the longitudinal axis when the fluid hose is disconnected.

[0012] The base body can be made in one piece or in multiple parts. Preferably, the base body is made in two parts, with the two parts being joined at the support surface. This simplifies the assembly of the hose coupling, particularly with regard to the toothed ring.

[0013] The toothed ring has several teeth projecting radially inwards, i.e., towards the fluid hose. The teeth are arranged on a base ring surface of the toothed ring. The teeth engage with the fluid hose from the outside, thus clamping the fluid hose. The inwardly projecting portions of the individual teeth determine a clamping diameter for the fluid hose. Preferably, the teeth are oriented obliquely to the longitudinal axis and also towards a second opening of the recess, which is opposite the first opening. This means that the ends of the teeth furthest from the support surface are closer to the second opening than the base ring surface. In this way, the teeth act like barbs, preventing the fluid hose from being pulled out towards the first opening of the recess.At the same time, this allows the fluid hose to slide off the teeth when it is inserted into the recess, or for the fluid hose to push the teeth radially outwards in order to slide past them.

[0014] A stop can be provided at the second opening to prevent the fluid hose from penetrating too far into the recess or from exiting the recess through the second opening. This stop allows working fluid to escape from the hose coupling while having an inner diameter that is smaller than the outer diameter of the fluid hose.

[0015] Preferably, the teeth are designed in such a way that they do not damage the fluid hose when intervening. For this purpose, the teeth may be rounded or flattened in the relevant areas.

[0016] The actuating sleeve is linearly movable within the base body. The actuating sleeve is positioned, at least partially, within the recess. The actuating sleeve also has a recess, which is referred to below as the sleeve recess. The fluid hose is inserted into the sleeve recess. Accordingly, in the section of the base body where the actuating sleeve is located, the actuating sleeve is positioned between the base body and the fluid hose.

[0017] The first end of the actuating sleeve protrudes from the base body and serves to actuate the actuating sleeve. In particular, the actuating sleeve can be manually pushed into the base body by a user via this first end.

[0018] The conical surface of the second end section tapers conically with increasing distance from the first end section. The conical surface rests against the teeth. When the actuating sleeve is pressed into the base body, the conical surface is pushed onto the teeth, causing the teeth to deflect radially outwards. This releases the teeth from the fluid hose, so that it is no longer clamped. The fluid hose can then be pulled out of the recess towards the first opening. Preferably, the teeth are designed to spring back towards the first opening to move the actuating sleeve towards it when the sleeve is no longer being actuated towards the second opening. This returns the actuating sleeve to its initial position, where it can be moved again towards the second opening if required.

[0019] The actuating sleeve is operated parallel to the longitudinal axis between the starting position and a release position. In the release position, the conical surface is pushed maximally onto the teeth. Thus, in the release position, the teeth are deflected maximally radially outwards.

[0020] The first end region of the actuating sleeve has an annular collar that projects radially outwards. This annular collar acts as a stop to prevent the actuating sleeve from being actuated. Preferably, when the actuating sleeve is in the release position, the annular collar rests against the base body, thus preventing further movement of the actuating sleeve into the base body. Furthermore, preferably, a second stop is provided to prevent further movement of the actuating sleeve out of the base body from the initial position. This second stop is particularly located at the second end region. A corresponding counter-stop is preferably provided in the recess.

[0021] The actuating sleeve is primarily operated via the end face of the ring collar facing away from the base body, particularly manually. To prevent damage to the end face of the ring collar during numerous coupling and decoupling operations for the fluid hose—damage that can occur, for example, from sharp edges on the fluid hose or from actuation with a pointed object such as a screwdriver—the invention provides that a protective ring is attached to the ring collar and that the protective ring at least partially covers the end face. The protective ring is attached, for example, by a positive or force-fit connection. Alternatively, the protective ring can be bonded to the ring collar by means of a material bond, for example, by gluing or welding.

[0022] Advantageous further developments of the invention are the subject of the dependent claims.

[0023] Preferably, the inner diameter of the actuating sleeve corresponds to the inner diameter of the protective ring. This means that the inner diameter of the actuating sleeve is essentially the same size as the inner diameter of the protective ring. This allows the fluid hose to be guided through the protective ring and inserted into the recess. It also ensures that the protective ring covers the end face as much as possible. Furthermore, it is preferably also possible for the outer diameter of the actuating sleeve to correspond to the outer diameter of the protective ring. This means that the outer diameter of the actuating sleeve is essentially the same size as the outer diameter of the protective ring.

[0024] Preferably, the actuating sleeve and the base body are made of plastic, and the protective ring is made of metal. This allows the actuating sleeve and the base body to be manufactured cost-effectively, while the protective ring provides protection, particularly for the first end region. For example, the actuating sleeve and the base body can be manufactured by injection molding. The protective ring can, for example, be made of sheet steel.

[0025] According to the invention, the protective ring has a hook that engages the ring collar and is integrally formed on the protective ring. This allows a positive and / or force-fit connection to be formed between the protective ring and the ring collar. Furthermore, the protective ring preferably has several hooks, for example, two hooks arranged opposite each other. This allows the protective ring to clamp the ring collar between the two hooks.

[0026] Preferably, the ring collar has a flattened area on its outer circumference that is gripped by the hook and / or a collar recess into which the hook engages. In the area of ​​a flattened area and in the area of ​​a collar recess, the ring collar has a reduced material thickness than in the area where neither a flattened area nor a collar recess is provided. A flattened area is a deviation in the outer contour of the ring collar where the outer circumference is closer to a central axis of the ring collar than in the area where neither a flattened area nor a collar recess is provided, but the outer circumference does not have a depression.A collar recess, on the other hand, is a deviation in the outer contour of the collar where the outer circumference is both closer to a central axis of the collar than in the area where neither a flattening nor a collar recess is present, and also features a depression. Immediately adjacent to the depression, the collar projects radially outwards beyond the collar recess.

[0027] Preferably, the outer diameter of the flattened section and / or collar recess, extending along a lateral axis perpendicular to the longitudinal axis, is smaller than or equal to the inner diameter of the hook extending along the lateral axis. This allows the protective ring to be slid onto the collar transversely to the longitudinal axis.

[0028] Preferably, the hook and the protective ring form a solid-state joint and, in particular, are deflectable along the lateral axis. This allows the hook, in the deflected state, to move along the longitudinal axis of the ring collar, then snap back into the non-deflection state and engage the ring collar. This enables the protective ring to be mounted onto the ring collar along its longitudinal axis.

[0029] Preferably, the ring collar has a sliding surface in the area of ​​the flattening and / or the collar recess, which is wedge-shaped or conical. This allows the hook to be deflected further and further as the protective ring is pushed onto the ring collar, without requiring any separate action. The ring collar has a thinner material thickness at the end of the sliding surface adjacent to the end face than at the end of the sliding surface facing the base body. Accordingly, the material thickness of the ring collar increases in the area of ​​the sliding surface from the end face towards the base body. This increase can be wedge-shaped, meaning that the sliding surface runs straight along a vertical axis perpendicular to both the longitudinal and lateral axes. Alternatively, the increase can be conical, meaning that the sliding surface is curved along the vertical axis.

[0030] Preferably, the ring collar has at least one locking projection extending along the longitudinal axis from the end face, and the protective ring has at least one locking recess corresponding to the locking projection, in which the locking projection is received. In this way, the protective ring can be locked with respect to an assembly movement transverse to the longitudinal axis. Furthermore, the ring collar preferably has several locking projections and the protective ring has several locking recesses. Preferably, the locking projection is designed such that the protective ring can be slid onto the ring collar transversely to the longitudinal axis. For this purpose, the locking projection may be tapered along the longitudinal axis away from the end face, for example, by being bulbous. Furthermore, preferably, the locking recess extends completely through the protective ring.

[0031] Preferably, the end face has an identification field and the protective ring has a marking recess that exposes the identification field. This allows information about the hose coupling, such as the hose diameter to be used, to be displayed on the end face, remaining visible even when the protective ring is fixed to the ring collar.

[0032] The problem is further solved by a fluid element, in particular from the group: fluid actuator, fluid valve, fluid consumer, with a hose coupling as described above.

[0033] The invention will now be explained in more detail with reference to the accompanying drawing. This drawing shows: Fig. 1 A fluid element with two hose couplings in an isometric view from a slanted top view, Fig. 2 the in Fig. 1 fluid element shown in a sectional view, Fig. 3 one of the two in the Fig. 1 and Fig. 2 hose couplings shown in an isometric view from a slightly oblique angle above, Fig. 4 the in Fig. 3 hose couplings shown in a sectional view, Fig. 5 an actuating element with a protective ring in a sectional view, Fig. 6 another actuating element with a protective ring in a sectional view, Fig. 7 that in Fig. 5 Actuating elements shown in an isometric view from a slanted top view, Fig. 8 that in Fig. 7 actuating elements shown in a top view, Fig. 9 the in Fig. 6 actuating elements shown in a top view, Fig. 10 den in Fig. 5 protective ring shown in an isometric view from a slightly oblique top view, Fig. 11 the in the Fig. 5 and Fig. 10 protective ring shown in an isometric view from a low angle.

[0034] Fig. Figure 1 shows a truncated rear section of a fluid element 200 with two hose couplings 100 in an isometric view from a slightly oblique angle above. The fluid element, which is not shown in any further detail, could, for example, be a fluid valve. The two hose couplings 100 are arranged one above the other with respect to a vertical axis 303, purely as an example. Fig. 1 is marked with two arrows A as a cutting plane.

[0035] Fig. Figure 2 shows the component of a fluid element 200 in a sectional view AA, which is shown in Fig. The section plane shown in Figure 1 corresponds to the two hose couplings 100. The two hose couplings 100 are identical for illustrative purposes only. Each of the two hose couplings 100 has a base body 110 (see Figure 1). Fig. 3) The base body 110 is shown as a purely exemplary two-part design, comprising a first base body part 111 and a second base body part 112. The first base body part 111 and the second base body part 112 together form the base body 110. References to the base body 110 below refer, purely as examples, to the first and second base body parts 111 and 112. Alternatively, the base body 110 can be a single piece or consist of more than two parts. Each base body 110 accommodates an actuating sleeve 130 for linear movement.

[0036] By way of example, the component of a fluid element 200 has a stepped bore 210. Furthermore, by way of example, the component of a fluid element 200 has several stepped bores 210, for example as in Fig. Figure 2 shows two stepped bores 210. As a purely exemplary illustration, one of the two hose couplings 100 is inserted into each of the two stepped bores 210. Furthermore, as an example, each of the two stepped bores 210 has a stop 212 against which the respective hose coupling 100 rests. In this way, the depth to which the hose coupling 100 is inserted into the component of a fluid element 200 can be determined along the longitudinal axis 301. Furthermore, as an example, the stepped bore 210 is designed such that an end face of the base body 110, in particular an end face of the first base body part 111, corresponds to an outer surface of the component of a fluid element 200. It is specifically provided that the end face of the first base body part 111 is substantially congruent with an outer surface of the component of a fluid element 200.

[0037] By way of example, a sealing ring 119 is provided at an end of the base body 110 facing the stop 212, in particular at an end of the second base body part 112 facing the stop 212, in the stepped bore 212. By way of example, the sealing ring 119 is also arranged in a corresponding groove of the base body 110, in particular in a corresponding groove of the second base body part 112. By way of example, the sealing ring 119 is designed such that it simultaneously seals against the stepped bore 212 and against the base body 110, in particular against the second base body part 112.

[0038] Fig. 3 shows one of the two in the Fig. 1 and Fig. Two hose couplings 100 are shown in an isometric view from a slightly oblique angle above. Fig. 3 is marked with two arrows B, indicating a cutting plane.

[0039] Fig. 4 shows the in Fig. 3 hose couplings 100 shown in a sectional view BB, which are in Fig. corresponds to the section plane shown in section 3.

[0040] The base body 110 is penetrated along a longitudinal axis 301 by a recess 113. The longitudinal axis 301 runs perpendicular to the vertical axis 303. A sealing groove 114 is formed in the recess 113. A sealing ring 116 is received in the sealing groove 114. The base body 110 has a circumferential support surface 118, which is shown, by way of example, at one end of the second base body part 112, which faces the first base body part 111. A toothed ring 120 rests partially on the support surface 118. The toothed ring 120 has several radially inwardly projecting teeth 122. The teeth 122 point towards each other.

[0041] The support surface 118 supports the toothed ring 120 resting on it, for example, when the fluid hose is inserted into the hose coupling 100, thus preventing displacement of the toothed ring 120 along the longitudinal axis 301. By way of example, the support surface 118 is implemented as part of a radial groove in the recess 113, so that the support surface 118 is associated with a retaining surface 124 opposite it with respect to the longitudinal axis 301, which prevents displacement of the toothed ring 120 along the longitudinal axis 301 when the fluid hose is disconnected.

[0042] By way of example, the support surface 118 is arranged at one end of the second base body part 112, which faces the first base body part 111. Furthermore, by way of example, the retaining surface 124 is arranged at one end of the first base body part 111, which faces the second base body part 112.

[0043] By way of example, the first base body part 111 and the second base body part 112 each have a toothed connection at their respective end regions, which face the end regions of the other base body part 111, 112. The two toothed connections are designed to correspond with each other and, in particular, enable the first and second base body parts 1112, 112 to snap into one another.

[0044] By way of example, the actuating sleeve 130 is shown in the recess 113. The actuating sleeve 130 has a first end region that projects from the base body 110 and has a radially outwardly projecting annular collar 142. Furthermore, by way of example, the annular collar 142 projects from the base body 110 along the longitudinal axis 301. The actuating sleeve 130 has a second end region with an external conical surface 150. The first end region, and thus the annular collar, is opposite the second end region and thus the conical surface. A protective ring 160 is fixed to the annular collar 142. The annular collar 142 has an end face facing away from the base body 110, which is at least partially covered by the protective ring 160.

[0045] The conical surface 150 tapers conically with increasing distance from the first end region, i.e., with increasing distance from the ring collar 142. The conical surface 150 rests against the teeth 122. By way of example, the toothed ring 120 is arranged along the longitudinal axis 301, starting from the first end region, i.e., from the ring collar 142, towards the second end region, i.e., towards the conical surface 150 in front of the sealing ring 116. Accordingly, the support surface 118 is arranged along this direction in front of the sealing groove 114.

[0046] When a fluid hose corresponding to an inner diameter of the recess 113 is inserted along its longitudinal axis through the interior of the actuating sleeve 130 into the recess 113, the fluid hose contacts the teeth 122. The teeth 122 engage the fluid hose from the outside, clamping it. By way of example, the teeth are oriented obliquely to the longitudinal axis 301 and also towards an opening of the recess 113 that faces away from the actuating sleeve 130. This means that the ends of the teeth 122 furthest from the support surface 118 are closer to the opening of the recess 113 facing away from the actuating sleeve 130 than to a base ring surface of the toothed ring 120, on which the teeth are formed.

[0047] By way of example, the protective ring 160 has a hook 164 that engages the ring collar 142 and is integrally formed on the protective ring 160. By way of example, the protective ring 160 has two hooks 164, which are furthermore arranged opposite each other with respect to a lateral axis 302. The lateral axis 302 runs perpendicular to the vertical axis 303 and perpendicular to the longitudinal axis 301.

[0048] By way of example, the ring 142 has a flattened area 144 on its outer circumference, which is gripped by the hook 164. Furthermore, by way of example, the ring 142 has two flattened areas 144, one of which is in Fig. 3 only one is visible. Furthermore, by way of example, each of the two flattened sections 144 is gripped by one of the two hooks 164.

[0049] Fig. Figure 5 shows a sectional view of an actuating element 130 with a protective ring 160. The sectional view lies in a plane spanned by the longitudinal axis 301 and the width axis 302. The Fig. The protective ring 160 shown in section 5 corresponds to the one shown in the Fig. 3 and Fig. 4 protective ring 160 shown. The in Fig. Actuating sleeve 130 shown in section 5 corresponds to the one described in the Fig. 3 and Fig. 4 actuating sleeve 130 shown. The hook 164 extends from the protective ring 160 along the longitudinal axis 301 in the direction of the conical surface 150.

[0050] By way of example, an inner diameter of 132 of the actuating sleeve 130 corresponds to an inner diameter of 162 of the protective ring 160, meaning that the inner diameter 132 of the actuating sleeve 130 is essentially the same size as the inner diameter 162 of the protective ring 160.

[0051] Fig. Figure 6 shows a further actuating element 130 with a protective ring 160 in a sectional view. The sectional view lies in a plane spanned by the longitudinal axis 301 and the width axis 302. The in Fig. The actuating sleeve 130 shown in Figure 6 differs from the one shown in the Fig. Actuating sleeve 130 shown in 3 to 5 by the fact that the ring collar 142 of the in Fig. Actuating sleeve 130 shown in 6 as an alternative to the flattening 144 of the ring collar 142 in the Fig. The actuating sleeve 130 shown in Figures 3 to 5 has a collar recess 145. By way of example, the ring collar 142 of the Fig. The actuating sleeve 130 shown in section 6 has two collar recesses 145.

[0052] By way of example, the ring collar 142 has a sliding surface 146 in the area of ​​the collar recess 145. The sliding surface 146 can be wedge-shaped or conical. The sliding surface 146 runs obliquely to the lateral axis 302 and obliquely to the longitudinal axis 301. Furthermore, by way of example, the hook 164 extends along the longitudinal axis 301 in the direction of the conical surface 150 and along the lateral axis 302 from the protective ring 160 radially outwards. By way of example, the hook 164 is chamfered in the same way as the sliding surface 146. By way of example, the ring collar 142 of the Fig. The actuating sleeve 130 shown in Figure 5 has a sliding surface 146 in the area of ​​the flattening 144.

[0053] Purely as an example, this also corresponds to the situation in Fig. 6 actuating sleeve 130 whose inner diameter 132 matches the inner diameter 162 of the protective ring 160.

[0054] Fig. 7 shows that in Fig. 5 Actuating element 130 shown in an isometric view from an oblique angle above and Fig. 8 that in Fig. Figure 7 shows the actuating element 130 in a top view. By way of example, the flattening 144 extends along the vertical axis 303 but not along the horizontal axis 302. Alternatively, the flattening 144 can extend along the horizontal axis 302 such that there is a gap between its outer contour and an imaginary outer contour of the ring collar 142 extending around its entire outer circumference.

[0055] By way of example, the ring assembly 142 has at least one transverse projection 149 extending from the end face along the longitudinal axis 301. Furthermore, by way of example, the ring assembly 142 has several transverse projections 149, for example as in Fig. 7 shows four bar projections 149.

[0056] By way of example, the ring assembly 142 has a marking field 148 on its end face facing away from the base body 110. The marking field 148 of the Fig. 7 and Fig. The actuating sleeve 130 shown in Figure 8 displays the letter A. Alternatively, the identification field 148 can show a number, for example, the diameter in millimeters of a fluid hose that fits the hose coupling 100 into which the actuating sleeve 130 is inserted.

[0057] As a purely exemplary case, the ring assembly 142 is circular in relation to a plane spanned by the width axis 302 and the height axis 303, apart from the flattening 144. Alternatively, the ring assembly 142 can be elliptical or polygonal.

[0058] Fig. 9 shows that in Fig. Figure 6 shows the actuating element 130 in a top view. In the area of ​​the collar recess 145, the ring collar 142 has a smaller diameter than in the rest of the ring collar 142. Accordingly, the ring collar 142 has a smaller extent in the area of ​​the collar recess 145 along the lateral axis 302 than immediately adjacent to the collar recess 145. When the hook 164 engages in the collar recess 145, rotation of the protective ring 160 fixed to the ring collar 142 about the longitudinal axis 301 can be prevented. Furthermore, this prevents the protective ring 160 from moving relative to the ring collar 142 with respect to each of the axes: longitudinal axis 301, lateral axis 302, and vertical axis 303.

[0059] Fig. 10 shows the one in Fig. 5 protective ring 160 shown in an isometric view from obliquely above and Fig. 11 the in the Fig. 5 and Fig. The protective ring 160 shown in Figure 10 is in an isometric view from a low angle. For illustrative purposes only, the protective ring 160 has the identification field 148 (see Figure 10). Fig. 7 and Fig. 8) Releasing license plate recess 168. Due to the license plate recess 168, the license plate field 148 is visible to a user even when the protective ring 160 is fixed to the ring band 142.

[0060] By way of example, the protective ring 160 has at least one bolt recess 169 corresponding to the bolt projection 149. Once the protective ring 160 is fixed to the ring collar 142, the bolt projection 149 is received in the bolt recess 169. Furthermore, by way of example, the protective ring 160 has several bolt recesses 169, for example, four bolt recesses 169. With the bolt projection 149 received in the bolt recess 169 and the hook 164, which engages the flattened area 144, the protective ring 160 can be prevented from moving relative to the ring collar 142 with respect to each of the axes longitudinal axis 301, lateral axis 302, and vertical axis 303.

[0061] By way of example, a bolt projection 149 on the ring collar 142 and a bolt recess 169 in the protective ring 160 can also be provided if the ring collar 142 has a collar recess 145.

Claims

[1] Hose coupling (100) for coupling a fluid hose to a fluid element, comprising a base body (110) which is penetrated along a longitudinal axis (301) by a recess (113) in which a sealing groove (114) is formed, and which has a circumferential support surface (118) on which a toothed ring (120) partially rests, the toothed ring having several radially inwardly projecting teeth (122) designed to engage on an outside of the fluid hose, as well as a sealing ring (116) received in the sealing groove (114), and an actuating sleeve (130) which is linearly movably received in the base body (110), which has a first end region projecting from the base body (110), and which has a second end region with an external conical surface (150) opposite the first end region, wherein the conical surface (150) becomes conical with increasing distance from the first end region is tapered and lies against the teeth (122),wherein the first end region has a radially outwardly projecting ring collar (142), wherein the ring collar (142) has an end face facing away from the base body (110), wherein a protective ring (160) is fixed to the ring collar (142) which covers the end face at least partially, wherein the protective ring (160) has a hook (164) which engages the ring collar (142) and is integrally formed on the protective ring (160). [2] Hose coupling (100) according to claim 1, characterized by , that an inner diameter (132) of the actuating sleeve (130) corresponds to an inner diameter (162) of the protective ring (160). [3] Hose coupling (100) according to one of the preceding claims, characterized by , that the actuating sleeve (130) and the base body (110) are made of plastic and the protective ring (160) is made of metal. [4] Hose coupling (100) according to any one of the preceding claims, characterized bythat the ring band (142) has a flattening (144) on its outer circumference which is gripped by the hook (164) and / or that the ring band (142) has a collar recess (145) into which the hook (164) engages. [5] Hose coupling (100) according to any one of the preceding claims, characterized by , that the hook (164) forms a solid body joint with the protective ring (160), and in particular is deflectable along a lateral axis (302) which runs perpendicular to the longitudinal axis (301). [6] Hose coupling (100) according to claims 4 and 5, characterized by , that the ring collar (142) has a sliding surface (146) in the area of ​​the flattening (144) and / or the collar recess (145), which is wedge-shaped or conical in shape. [7] Hose coupling (100) according to one of the preceding claims, characterized by, that the ring collar (142) has at least one bar projection (149) extending along the longitudinal axis (301) from the end face, and that the protective ring (160) has at least one bar recess (169) corresponding to the bar projection (149), in which the bar projection (149) is received. [8] Hose coupling (100) according to any one of the preceding claims, characterized by , that the front surface has a license plate field (148) and the protective ring (160) has a license plate recess (168) releasing the license plate field (148). [9] Fluid element, in particular from the group: fluid actuator, fluid valve, fluid consumer, with a hose coupling (100) according to one of the preceding claims.

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