Connection piece housing for connecting to a fluid line, and system comprising the connection piece housing

Abstract

The invention relates to a connection piece housing (10) for connecting to a fluid line, comprising a sleeve portion (12) having an opening (20) for the insertion of a connection piece (40) along a longitudinal axis (14) and having a wall (16) which extends in the circumferential direction about the longitudinal axis (14) with an inner surface (18) that delimits the opening (20), wherein the inner surface (18) has a recess (22) for the leadthrough of a securing tab (34) of a securing element (32) that can be inserted into the opening (20) for the purposes of locking a connection piece (40) that has been inserted through the securing element (32) into the connection piece housing (10), and a receptacle (24) for receiving at least a part of the securing tab (34), wherein the recess (22) extends in an axial direction from an axial entrance (26) at an edge (28) of the opening (20), and the receptacle (24) is spaced apart in an axial direction from the edge (28) of the opening (20), wherein a locking element (30) for locking the securing tab (34) in the receptacle (24) is arranged between the receptacle (24) and the recess (22), characterized in that the receptacle (24) is offset in a circumferential direction with respect to the recess (22). The invention provides an improved connection piece housing (10), in which a connection piece (40) that is locked in the connection piece housing (10) can be subjected to increased tensile forces in the axial direction.

Description

[0001] Nozzle housing for connecting to a fluid line and system comprising the nozzle housing

[0002] The invention relates to a nozzle housing for connecting to a fluid line and a system comprising the nozzle housing.

[0003] Devices comprising a nozzle and a nozzle housing can be used to connect fluid lines. One of the fluid lines to be connected, e.g., a pipe, is connected to the nozzle, and the other, e.g., a hose, is connected to the nozzle housing. The nozzle can be inserted into an opening in the nozzle housing and secured to the nozzle housing by a locking element.

[0004] DE102020115021A1 discloses a system with a nozzle housing, in which the nozzle is secured to the nozzle housing by a securing element. The securing element has securing tabs that extend axially into a channel and an axially adjacent opening with a locking edge extending in the circumferential direction. The securing tabs lock into the opening when inserted into the opening.

[0005] The object of the invention is to provide an improved nozzle housing in which a nozzle locked in the nozzle housing can be subjected to increased tensile forces in the axial direction.

[0006] Main features of the invention are specified in claims 1 and 6. Embodiments are the subject of claims 2 to 5 and 7 to 8. In a nozzle housing for connecting to a fluid line, comprising a sleeve portion with an opening for inserting a nozzle along a longitudinal axis and a wall that extends circumferentially around the longitudinal axis and that delimits the opening with an inner surface, wherein the inner surface has a recess for passing through a securing tab of a securing element that can be inserted into the opening for locking a nozzle inserted into the nozzle housing through the securing element, and a receptacle for receiving at least a portion of the securing tab, wherein the recess extends from an axial access at an edge of the opening in an axial direction, and the receptacle is spaced from the edge of the opening in an axial direction,wherein a locking element for locking the securing tab in the receptacle is arranged between the receptacle and the recess, according to the invention it is provided that the receptacle is arranged offset from the recess in a circumferential direction.

[0007] The invention provides a nozzle housing in which the function of inserting the securing tab of the securing element is spatially separated from the function of locking the securing tab in the circumferential direction around the longitudinal axis. The nozzle housing has a recess on the inner surface of the wall defining the opening, through which a securing tab of a securing element can be inserted in the axial direction. Furthermore, a receptacle is arranged offset from the recess in the circumferential direction. In order to arrange the securing tab inserted into the recess in the receptacle, the securing element with the securing tab must be rotated in the circumferential direction towards the receptacle. By offsetting the receptacle in the circumferential direction, the holding of the securing tab in the receptacle in the axial direction is separated from the insertion position in the recess.As a result, the holder can be made more stable in the axial direction and a nozzle locked in the nozzle housing can be subjected to an increased tensile force compared to the state of the art.

[0008] The locking tab on the nozzle housing is locked by means of a plug-and-turn movement similar to a bayonet lock. A locking element is arranged between the recess and the receptacle, which locks the locking tab in the recess. The locking action of the locking element blocks rotation of the locking tab and thus of the locking element in the circumferential direction from the receptacle to the recess. This rotation is opposite to the rotation with which the locking tab is moved from the recess into the receptacle. The terms "axial direction," "radial direction," and "circumferential direction" each refer to the longitudinal axis of the opening.

[0009] According to one example, the locking element may have an axially extending locking edge that is spaced axially from the access.

[0010] When the securing tab is pulled in the axial direction, the locking edge is subjected to less stress than an edge of the holder running in the circumferential direction.

[0011] According to a further example, the receptacle may comprise a release device for decoupling the securing tab from a nozzle inserted into the opening.

[0012] The release device can be used to release or unlock a nozzle secured by a securing element locked in the nozzle housing in order to be removed from the securing element and the nozzle housing.

[0013] Furthermore, the release device can, for example, have a ramp surface that is bevelled radially inwards towards the axis.

[0014] The ramp surfaces can be arranged on a side of the receptacle opposite the recess. The locking tab can then be moved away from the recess over the ramp surface by rotating it. This allows the locking tab to be moved radially outward by means of the ramp surface. This causes the locking tab to be decoupled from the nozzle, releasing it.

[0015] According to a further example, the wall may have a greater radial thickness starting from the receptacle in an axial direction pointing out of the opening than starting from the recess in a radial direction.

[0016] Due to the greater radial thickness, the wall can absorb further increased tensile forces in the axial direction, which are transmitted by the securing tab arranged in the holder.

[0017] The invention further relates to a system for connecting fluid lines, comprising a nozzle housing according to the preceding description, a securing element which can be inserted into the opening and a nozzle which can be locked by the securing element in the nozzle housing, wherein the securing element has at least one securing tab for locking the nozzle in the opening and the securing tab can be inserted in the axial direction through the access into the recess, wherein the securing tab changes from an initial position into a radially inwardly offset position when inserted into the recess and is arranged at least partially in the receptacle by rotating the securing element in the circumferential direction out of the recess, wherein the securing element changes into the initial position when rotated into the receptacle.

[0018] The advantages and effects, as well as further developments of the system, arise from the advantages and effects, as well as further developments of the nozzle housing described above. Therefore, reference is made to the preceding description in this regard.

[0019] According to one example, the nozzle housing can have at least one release device for decoupling the securing tab from a nozzle inserted into the opening, wherein by rotating the securing element towards the ramp surface, the securing tab changes from the initial position into a radially outwardly offset position and releases a nozzle locked in the opening.

[0020] According to a further example, the securing tab may have a locking body which cooperates with the locking element in such a way that rotation of the locking body in the circumferential direction from the receptacle to the recess is locked when the locking body is arranged in the receptacle.

[0021] The locking body can rest axially against a wall section in the receptacle that extends in the circumferential direction. By offsetting the receptacle in the circumferential direction relative to the recess, the wall section can be made strong enough to withstand increased tensile forces compared to the prior art.

[0022] Further features, details, and advantages of the invention will become apparent from the wording of the claims and from the following description of exemplary embodiments with reference to the drawings. They show:

[0023] Fig. 1 is a schematic representation of the nozzle housing;

[0024] Fig. 2a-c a schematic representation of the nozzle housing with securing element; and

[0025] Fig. 3 is a schematic representation of a system comprising a nozzle, securing element, and nozzle housing. Figure 1 shows a view of the nozzle housing 10 for connecting to a fluid line along a longitudinal axis 14.

[0026] The nozzle housing 10 has a sleeve portion 12 having an opening 20. Starting at the opening 20, a fluid channel extends through the nozzle housing 10 and opens into another opening on the nozzle housing 10. In this example, the longitudinal axis 14 can extend substantially through the center of the opening 20.

[0027] Furthermore, the sleeve portion 12 has a wall 16 extending around the opening 20. The wall 16 extends circumferentially around the longitudinal axis 14. An inner surface 18 of the wall 16 delimits the opening 20. Furthermore, an edge 28 of the opening 20 extends around the opening 20 as the end face of the wall 16.

[0028] The inner surface 18 has a recess 22 that begins at an axial access 26 located at the edge 28 of the opening 20. The recess 22 can extend in the form of a channel open toward the longitudinal axis 14 in the axial direction along the inner surface 18.

[0029] The recess 22 is designed such that a securing tab 34 of a securing element 32 can be inserted into the recess 22 through the access 26 in the axial direction, as shown in Figure 2a.

[0030] Furthermore, the inner surface 18 has a receptacle 24 for at least a portion of the securing tab 34 insertable through the recess 22. The receptacle 24 is arranged offset in a first circumferential direction next to the recess 22 and spaced axially from the edge 28 of the opening 20. For a securing tab 34 inserted into the recess 22, the receptacle 24 is accessible only via the recess 22.

[0031] For this purpose, the securing tab 34 can first be inserted into the opening 20 with the securing element 32, as shown in Figure 2a. The securing tab 32 is first inserted into the recess 22 in the axial direction.

[0032] The opening 20 can have a radius at the recess that is smaller than the distance between the securing tab 34 and the longitudinal axis 14. During insertion, the securing tab 32 can therefore be guided through the recess 22 from an initial position into a radially inwardly offset position. This means that the securing tab 32 can be elastically bent toward the longitudinal axis 14 by being inserted into the recess 22. Once the securing tab 34 has been inserted into the recess 22, the securing element 32 can be rotated in the first circumferential direction about the longitudinal axis 14, as shown in Figure 2b. In doing so, the securing tab 34 is moved from the recess 22 into the receptacle 24 and arranged as shown in Figure 2c.

[0033] At the receptacle 24, the opening 20 can have a larger radius than the distance of the securing tab 34 from the longitudinal axis 14. The securing tab 34 can therefore move from the radially inwardly offset position back to its original position in the receptacle 24.

[0034] A locking element 30 is arranged between the recess 22 and the receptacle 24. The locking element 30 is designed to lock a securing tab 34 arranged in the receptacle 24. During the rotational movement from the recess 22 into the receptacle 24, the securing tab 34 is thus moved over the locking element 24.

[0035] While passing the locking element 30, the securing tab 34 can be in the radially inwardly offset position. After passing the locking element 30, the securing tab 34 can be moved back to its original position in the receptacle 24 and is then locked in the receptacle 24 by the locking element 30. The locking element 30 blocks movement of the securing tab 34 locked in the receptacle 24 toward the recess 22. This means that the locking element 30 locks the securing tab 34 in a second circumferential direction, which is opposite to the first circumferential direction.

[0036] The locking element 30 can be designed as a locking edge. The locking edge can extend in the axial direction between the recess 22 and the receptacle 24. A securing body 36, which protrudes radially from the securing tab 34, can interact with the locking edge to effect locking when the securing body 36 and thus the securing tab 32 are arranged in the receptacle 24.

[0037] In the axial direction out of the opening 20, the securing tab 34, locked in the receptacle, is held in a form-fitting manner by a first wall section 27. The first wall section 27 has a thickness in the radial direction that is greater than the thickness of a second wall section 29, which delimits the recess 22 in the radial direction. The thickness of the two wall sections 27, 29 is measured between the boundary surfaces of the wall 16 at the respective position.

[0038] In the prior art, in which the receptacle 24 follows the recess 22 in the axial direction, the receptacle 24 is delimited radially out of the opening by the second wall section 29. Due to the greater thickness of the first wall section 27 according to the invention, the first wall section 26 can withstand increased tensile forces in the axial direction, which are transmitted via a securing tab 34 received by the receptacle 24.

[0039] Particularly in the case of small dimensions, the thickness of the first wall section 327 can be made larger than in the prior art by separating the receptacle 24 in the circumferential direction from the recess 22 in order to withstand comparatively large tensile forces despite the small dimensions of the nozzle housing 10.

[0040] The securing tab 34 can have a first locking element 38 on an outer surface facing the longitudinal axis 24, as shown in Figure 3. The first locking element 38 can interact with a second locking element 42 arranged on a nozzle 40. The nozzle 40 can be inserted through the securing element 32 into the opening 20 of the nozzle housing 10. As soon as the nozzle 40 has reached its intended position in the nozzle housing 10, the first and second locking elements 38, 42 lock together and secure the nozzle 40 in the nozzle housing 10. The securing tab 34 is then coupled to the nozzle 40. Furthermore, a seal 44 can be arranged between the nozzle 40 and the nozzle housing 10.

[0041] To remove the nozzle 40 from the nozzle housing 10, the receptacle 24 can have a release device 25 designed to decouple the securing tab 34 from the nozzle 40. For this purpose, the release device 25 can have a radially inwardly beveled ramp surface arranged on the receptacle 24. The receptacle 24 is arranged in the circumferential direction between the release device 25 and the recess 22.

[0042] By rotating the securing element 32 in the first circumferential direction, i.e., away from the recess 22, the securing tab 34 is moved toward the ramp surface. The edge of the ramp surface adjacent to the receptacle 24 is arranged closer to the longitudinal axis 14 than the side of the securing tab 34 facing the longitudinal axis 14.

[0043] As the securing tab 34 is moved further in the first circumferential direction, the securing tab 34 moves over the ramp surface and is moved into a radially outwardly offset position. This causes the first locking element 38 to move radially outward away from the second locking element 42, so that the securing tab 34 is decoupled from the nozzle 40. The nozzle 40 is thereby released and can then be removed from the opening 20.

[0044] The invention is not limited to one of the embodiments described above, but can be modified in many ways.

[0045] All features and advantages arising from the claims, the description and the drawings, including design details, spatial arrangements and method steps, can be essential to the invention both individually and in a wide variety of combinations.

[0046] Reference symbol list

[0047] 10 nozzle housing

[0048] 12 sleeve section

[0049] 14 Longitudinal axis

[0050] 16 Wall

[0051] 18 inner surface

[0052] 20 Opening

[0053] 22 Recess

[0054] 24 recording

[0055] 25 Release device

[0056] 26 Access

[0057] 27 wall section

[0058] 28 Rand

[0059] 29 wall section

[0060] 30 locking element

[0061] 32 securing element

[0062] 34 securing tab

[0063] 36 locking bodies

[0064] 38 locking element

[0065] 40 nozzles

[0066] 42 locking element

[0067] 44 Seal

Claims

Patent claims 1. A nozzle housing for connecting to a fluid line, comprising a sleeve portion (12) with an opening (20) for inserting a nozzle (40) along a longitudinal axis (14) and a wall (16) which extends in the circumferential direction around the longitudinal axis (14) and which delimits the opening (20) with an inner surface (18), wherein the inner surface (18) has a recess (22) for passing through a securing tab (34) of a securing element (32) which can be inserted into the opening (20) for locking a nozzle (40) inserted into the nozzle housing (10) through the securing element (32), and a receptacle (24) for receiving at least a part of the securing tab (34), wherein the recess (22) extends from an axial access (26) on an edge (28) of the opening (20) in an axial direction and the receptacle (24) from the edge (28) of the opening (20) is spaced in an axial direction,wherein a locking element (30) for locking the securing tab (34) in the receptacle (24) is arranged between the receptacle (24) and the recess (22), characterized in that the receptacle (24) is arranged offset from the recess (22) in a circumferential direction.

2. Nozzle housing according to claim 1, characterized in that the locking element (30) has a locking edge extending in the axial direction, which is spaced from the access (26) in the axial direction.

3. Nozzle housing according to claim 1 or 2, characterized in that the receptacle (24) has a release device (25) for decoupling the securing tab (34) from a nozzle (40) inserted into the opening (20).

4. Nozzle housing according to claim 3, characterized in that the release device (25) has a ramp surface which is bevelled radially inwards to the longitudinal axis (14).

5. Nozzle housing according to one of the preceding claims, characterized in that the wall (16) has a greater radial thickness starting from the receptacle (24) in an axial direction pointing out of the opening (20) than starting from the recess (22) in a radial direction.

6. System for connecting fluid lines, comprising a nozzle housing (10) according to one of the preceding claims, a securing element (32) insertable into the opening (20) and a Nozzle housing (10) lockable nozzle (40), wherein the securing element (32) has at least one securing tab (34) for locking the nozzle (40) in the opening (20) and the securing tab (34) can be inserted in the axial direction through the access (26) into the recess (22), wherein the securing tab (34) changes from an initial position into a radially inwardly offset position when inserted into the recess (22) and is arranged at least partially in the receptacle (24) by rotating the securing element (32) in the circumferential direction out of the recess (22), wherein the securing element (32) changes into the initial position when rotated into the receptacle (24).System according to claim 6, characterized in that the nozzle housing (10) is further developed at least according to claim 3, wherein, by rotating the securing element (32) toward the ramp surface, the securing tab (34) changes from the initial position into a radially outwardly offset position and releases a nozzle (40) locked in the opening (20). System according to claim 6 or 7, characterized in that the securing tab (34) has a locking body (36) which interacts with the locking element (30) in such a way that rotation of the locking body (36) in the circumferential direction from the receptacle (24) to the recess (22) is locked when the locking body (36) is arranged in the receptacle (24).

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