Clamping sleeve for mounting a rotary sensor, as well as rotary sensor arrangement and rotary sensor system with such a clamping sleeve

Description

[0001] The invention relates to a clamping sleeve for mounting a rotary sensor in a receiving opening provided in a receiving device, as well as a rotary sensor arrangement and a rotary sensor system with such a clamping sleeve.

[0002] Active speed sensors require an anti-rotation device to ensure correct direction detection. For this purpose, the speed sensor is, for example, screwed into a receiving opening of a mounting device or into a receiving seat located within the receiving opening, or it has corresponding positive locking elements. To reduce the effort required to modify the respective positive locking mechanism, speed sensors that do not require an anti-rotation device to ensure correct direction detection can alternatively be used. However, such speed sensors require a complex and comparatively expensive sensor system.

[0003] For example, DE 10 2012 024 762 A1 relates to a clamping sleeve for a sensor for friction-fit fixing and adjustment of the sensor in a bore of a holding part, wherein the clamping sleeve is provided with at least two spring tongues and at least three fixed points, wherein the at least two spring tongues are each connected to the clamping sleeve on one side and are each freely movable at their tip, wherein a fine adjustment tongue is further arranged on the clamping sleeve.

[0004] DE 10 2017 113 604 A1 relates to an arrangement of a rod-shaped rotary encoder and a clamping sleeve in a bore of a holder for detecting the rotational speed of a rotor, wherein the clamping sleeve is positioned in the bore in a rotationally secure manner and the rotary encoder with a sensor head is held axially displaceable in the clamping sleeve by frictional locking.

[0005] DE 10 2013 000 204 A1 relates to a sensor device for measuring the rotational speed of a vehicle wheel. The sensor device comprises a sensor carrier with a sensor integrated into the carrier to detect the rotation of a flywheel rotating with the wheel. The sensor device has clamping means integrated into the sensor carrier, by means of which the sensor carrier can be movably clamped in a holding opening in the area of ​​the wheel for speed measurement and / or can be clamped in any orientation with respect to rotations about the longitudinal axis of the sensor carrier.

[0006] WO 2006 / 047899 A1 concerns the fastening of a sensor with a cylindrical housing to a machine part bore, for which a bushing is at least partially inserted into the bore. The sensor housing or a mounting sleeve is positively connected to the bushing by means of a radially acting clamping connection.

[0007] In view of the foregoing, the object of the invention is therefore to provide an anti-rotation device for a rotary sensor, thereby reducing the respective adjustment effort.

[0008] The problem is solved by a clamping sleeve for mounting a rotary sensor, a rotary sensor arrangement, and a rotary sensor system according to the dependent claims. Advantageous embodiments of the invention are contained in the dependent claims.

[0009] According to the invention, a clamping sleeve for mounting a rotary sensor in a receiving opening provided in a receiving device, the clamping sleeve having a longitudinal axis around which at least partially a cylindrical surface of the clamping sleeve extends in the direction of the longitudinal axis, is designed to be inserted at least partially into the receiving opening and held therein by frictional engagement, and the clamping sleeve is also designed to correspond to the rotary sensor to be mounted, so that when the rotary sensor is inserted into the clamping sleeve a positive locking connection can be formed between the rotary sensor and the clamping sleeve.

[0010] Accordingly, the rotational locking of the rotary sensor in a receiving opening of a receiving device for the rotary sensor is achieved via the clamping sleeve, which forms at least a frictional connection with the receiving opening and at least a positive connection with the rotary sensor. In other words, the rotary sensor can be held rotationally secure in the receiving opening by a combination of frictional and positive locking. Based on this combination, the existing clamping sleeve can serve as the rotational locking device with minor modifications, thus eliminating the need for additional positive locking elements, such as extra sleeves, or for a specifically designed positive locking contour of the receiving opening of the receiving device.

[0011] The positive locking mechanism between the clamping sleeve and the rotary sensor must be provided in at least one direction in which the anti-rotation protection is to be achieved. For example, if the intended anti-rotation direction corresponds to a direction of rotation around the longitudinal axis of the clamping sleeve, then a positive locking mechanism must be provided in at least this direction.

[0012] Regarding the longitudinal axis, it should be noted that it refers here to the clamping sleeve or its outer surface, which at least partially surrounds the longitudinal axis. However, the longitudinal axis of the clamping sleeve also defines a longitudinal axis for the rotary sensor and the receiving device or receiving opening. In other words, the longitudinal axis of the clamping sleeve is also the longitudinal axis of the rotary sensor and the receiving device in a rotary sensor system described later. The axis reference evident from the rotary sensor system is adopted for the individual components.

[0013] In addition, the clamping sleeve has a slot in the direction of the longitudinal axis, at least in sections, which is open at least to one side facing the rotary sensor during assembly.

[0014] A positive locking section of the clamping sleeve can be easily formed on the longitudinally extending, mutually facing sides of the slot. This section is designed to receive a corresponding positive locking section of the rotary sensor. Since the clamping sleeve is held in the receiving opening of the mounting device by friction when installed, the engagement of the positive locking section of the rotary sensor in the slot provides anti-rotation protection, preventing the rotary sensor from rotating around its longitudinal axis.

[0015] The slot is open for the insertion of the rotary sensor or the positive locking element section of the rotary sensor, at least on the side of the clamping sleeve facing the rotary sensor during assembly. If the slot is open on both sides of the clamping sleeve, i.e., continuous, the rotary sensor can be inserted into the clamping sleeve from either side. Furthermore, the rotary sensor can be flexibly positioned axially within the clamping sleeve. Alternatively, the slot in the clamping sleeve can be provided only over a predetermined length along the longitudinal axis. The end of the slot furthest from the open end can then be used, for example, as a stop for the rotary sensor or the positive locking element section of the rotary sensor, defining a predetermined mounting position of the rotary sensor within the clamping sleeve along the longitudinal axis.

[0016] Furthermore, the slot has at least a radially inwardly angled end section on both sides extending in the direction of the longitudinal axis.

[0017] The inwardly angled end section allows for the compensation of tolerances in the radial direction with respect to the longitudinal axis. Therefore, the positive-locking section of the rotary sensor can be engaged with the clamping sleeve with greater reliability. Alternatively or additionally, the clamping sleeve can also have a greater radial extent, i.e., wall thickness, in the area of ​​the slot.

[0018] According to further training, the inwardly angled end section is designed to be elastic or spring-like.

[0019] In other words, the inwardly angled end section has an extension, particularly a radial extension, which is elastic or resilient. Preferably, the inwardly angled end section has a radial extension of 1 mm or less. The radial extension of the inwardly angled end sections does not correspond to the length of the angled end sections, but rather to the radial distance, with respect to the longitudinal axis, between the end of the angled end section adjacent to the lateral surface and the end opposite it. In other words, the radial distance can be expressed as x*sin(α), where x corresponds to the length of the end section from an end facing the lateral surface to an end opposite it, and α is the angle of attack between the outer lateral surface and the angled end section.

[0020] The elastic or spring-like radial extension allows for sufficient tolerance compensation without, for example, having to account for significant eccentricity of the rotary sensor (in the case of a cylindrical sensor except for the positive locking section) or significantly reducing the circumferential support surface for the sensor with the clamping sleeve. This tolerance compensation enables anti-rotation protection with a radial extension of 1 mm or less. Therefore, the modification effort required when switching to an active speed sensor is reduced. The positive locking section on the speed sensor can be made shallower than without elastic extension.

[0021] In one embodiment, the clamping sleeve has at least a section of an end section that is axial with respect to the longitudinal axis a clamping sleeve projection which projects radially outwards with respect to the longitudinal axis.

[0022] The clamping sleeve projection, which extends radially outwards with respect to the longitudinal axis, can serve as a stop for mounting the clamping sleeve in the receiving opening of the holding device, ensuring that the clamping sleeve does not exceed a predetermined relative position in the receiving opening along the longitudinal axis. If the clamping sleeve is designed such that a specific mounting direction must be maintained, this can also be directly identified visually by the radial clamping sleeve projection. In such a case, for example, the clamping sleeve would first be inserted into a bore serving as the receiving opening with the end section facing away from the radial clamping sleeve projection.

[0023] The radial clamping sleeve projection can also be brought into positive engagement with a corresponding recess on the end face facing the clamping sleeve when it is inserted, in the case of only partial formation, so that a position-oriented assembly of the clamping sleeve in the receiving opening can be provided, as will be taken up again later in the sense of an assembly aid.

[0024] The radial clamping sleeve projection can form an end face of the clamping sleeve, but can also be offset from such an end face within the end section in the direction of the longitudinal axis.

[0025] In one version, the clamping sleeve has at least one spring element on its outer surface.

[0026] Such a spring element can, for example, exert at least a radially outward spring force with respect to the longitudinal axis to form or support the frictional connection between the clamping sleeve and the receiving opening. Alternatively or additionally, the spring element can also be configured to exert at least a radially inward spring force to enable a frictional connection in addition to the positive locking between the clamping sleeve and the rotary sensor, for example, to relieve stress on the positive locking elements or to provide additional anti-rotation protection.

[0027] In a further training course, the clamping sleeve features an assembly aid for position-oriented assembly in the receiving opening.

[0028] The mounting aid is designed such that the clamping sleeve can be mounted in the receiving opening of the mounting device in a positionally oriented manner, i.e., it can be aligned with a predetermined angular position relative to the longitudinal axis. Thus, when the rotary sensor is mounted, the angular position of the sensor relative to the longitudinal axis is defined by the position of the positive-locking section of the clamping sleeve and the corresponding positive-locking section of the rotary sensor. The mounting aid for the positionally oriented mounting of the clamping sleeve in the receiving opening can be designed using optical, mechanical, and / or electrical orientation aids.

[0029] In particular, the assembly aid consists of a mandrel protruding from the receiving opening in the application position, with a spirit level attached to it.

[0030] The spirit level, used as a visual assembly aid, is positioned, for example, on the clamping sleeve where a bubble or corresponding indicator is located precisely between the limit indicators when the clamping sleeve is in a predetermined, oriented mounting position. Spirit levels with multiple axes can also be used.

[0031] Alternatively or additionally, the assembly aid is formed from a mandrel with a template attached to it.

[0032] The template is adapted to parts of the geometry of the housing in which the speed sensor is installed, so that the mandrel with the clamping sleeve can only be inserted into the bore in the intended angular position.

[0033] Alternatively or additionally, the assembly aid forms a positive fit with the receiving device.

[0034] A corresponding positive locking mechanism can also serve as an assembly aid, for example, via the protruding radial clamping sleeve projection in conjunction with a corresponding recess in the receiving device. The radial clamping sleeve projection can thus be used, in particular, as an assembly aid and as a stop.

[0035] In a further training course, the clamping sleeve is detachably connected to the clamping sleeve.

[0036] The detachable connection between the clamping sleeve and the mounting aid allows, for example, the removal of interfering contours caused by the mounting aid after the clamping sleeve has been correctly positioned in the receiving opening. The term "detachable connection" is not limited to non-destructive connections, but can also include predetermined breaking points and the like. However, for the sake of reusability, depending on complexity and therefore cost, non-destructive connections are preferable, such as those provided by screw-on mounting aids.

[0037] In a further aspect, the invention relates to a rotary sensor arrangement comprising a clamping sleeve described above and a rotary sensor designed to be inserted at least partially into the clamping sleeve in the direction of the longitudinal axis, wherein the rotary sensor has at least partially a rotary sensor projection which projects radially outwards with respect to the longitudinal axis, so that when the rotary sensor is inserted into the clamping sleeve, a positive locking connection can be formed between the rotary sensor and the clamping sleeve via the rotary sensor projection.

[0038] The radial projection of the rotary sensor thus serves as a positive-locking section of the sensor, which can be engaged with a corresponding positive-locking section of the clamping sleeve to prevent rotation around the longitudinal axis. The radial projection can be designed as a pin or as a radial projection extending in the direction of the longitudinal axis, i.e., in the axial direction. If one or more radial projections engage securely with several surfaces of the positive-locking section of the clamping sleeve in the direction of the longitudinal axis, tilting of the rotary sensor within the clamping sleeve can be prevented, which could potentially lead to jamming of the rotary sensor within the clamping sleeve if there is sufficient play.Alternatively or additionally, the rotary sensor can also have at least one recess into which at least one clamping sleeve projection, pointing radially inwards with respect to the longitudinal axis, engages and is designed in such a way that it forms a positive fit with the recess.

[0039] According to one embodiment, the rotary sensor projection extends in the direction of the longitudinal axis at least over a section that forms the positive locking with the clamping sleeve in a predetermined application position.

[0040] For example, the rotary sensor arrangement can be designed such that a positive fit between the clamping sleeve and the rotary sensor does not occur over the entire possible mounting path along the longitudinal axis, but only in a predetermined application position, i.e., a predetermined relative position between the clamping sleeve and the rotary sensor. Accordingly, anti-rotation protection may no longer be present before and after the predetermined application position. In such a case, the correct positioning of the rotary sensor in the clamping sleeve can be verified by the presence or absence of anti-rotation protection, and thus at least a certain degree of rotational freedom. For example, a slot in the clamping sleeve designed for positive locking can taper from one receiving side for the rotary sensor towards the longitudinal axis and only form a positive fit with the radial rotary sensor projection after a predetermined insertion distance.As long as the rotary sensor is not inserted fully into the clamping sleeve, a certain degree of rotational freedom remains. According to another example, the radial projection of the rotary sensor and / or the positive-locking section of the clamping sleeve can each be formed only within a predetermined area, with the areas being aligned for positive locking. The length of the overlapping area corresponds to the possible predetermined application positions. Multiple overlapping areas can also be provided along the longitudinal axis if several predetermined application positions are required.

[0041] The invention further relates to a rotary sensor system comprising a clamping sleeve as described above, a rotary sensor according to the rotary sensor arrangement described above, and a receiving device with at least one receiving opening extending in the direction of the longitudinal axis, wherein the clamping sleeve is held in the receiving opening in a rotationally secure manner at least by frictional engagement and the rotary sensor is held at least by positive engagement with the clamping sleeve.

[0042] As explained above, the arrangement and design of the clamping sleeve in the receiving opening create a frictional connection, ensuring that the rotary sensor is held securely in the clamping sleeve when positively engaged. Advantages and further developments are analogous to those described previously.

[0043] In one embodiment, the receiving opening is a through opening in the direction of the longitudinal axis.

[0044] The rotary sensor can thus protrude from the receiving opening on the side opposite the insertion point, allowing it to be positioned as close as possible to a measuring point. Alternatively, the receiving opening can be partially closed, with the side opposite the insertion point being closed or at least smaller than the inserted end of the rotary sensor, in order to protect it and / or to provide a stop for it according to a predetermined application position.

[0045] The invention will now be explained in more detail with reference to one embodiment and the accompanying figures. The figures show, in detail: Figure 1 shows a perspective view of a rotary sensor system with a clamping sleeve according to a first embodiment of the invention. Figure 2shows a cross-sectional view of the receiving device with the clamping sleeve mounted therein according to Figure 1 in a section plane perpendicular to the longitudinal axis.

[0046] Figure 1Figure 1 shows a perspective view of a rotary sensor system 100 according to a first embodiment of the present invention. The rotary sensor system 100 comprises a receiving device 10 with a receiving opening 11, which is designed as a through-hole and extends along a longitudinal axis L. The rotary sensor system 100 also comprises a rotary sensor assembly 1, which has a clamping sleeve 20 and a rotary sensor 30. A cylindrical surface 20a of the clamping sleeve 20 extends axially around the longitudinal axis L and forms a slot 21, also extending axially, which in this embodiment is open on both sides of the clamping sleeve in the direction of the longitudinal axis and has a constant distance between the slots.On one side of the clamping sleeve 20 facing away from the receiving opening 11, it also has a radially outwardly projecting clamping sleeve projection 23, which serves as a stop, thus limiting the insertion path of the clamping sleeve into the receiving opening 11 via the radial clamping sleeve projection 23. A mounting aid 25 is also provided on the side of the radial clamping sleeve projection 23. This mounting aid 25 is designed as a projection pointing in the direction of the longitudinal axis, which must be aligned with a marking on the side of the receiving device 10 facing the clamping sleeve when it is inserted into the receiving opening 11 (not shown here) for correct positioning. Furthermore, the cylindrical surface 20a forms spring elements 24, the spring force of which acts outwards at least in the radial direction with respect to the longitudinal axis L to support the frictional engagement of the clamping sleeve 20 in the receiving opening 11.With regard to the frictional connection, the clamping sleeve 20 is also configured such that it is elastically compressed when inserted into the receiving opening 11, in order to form a frictional connection, at least partially, through the elastic restoring force. Alternatively, the clamping sleeve 20 can be pressed into the receiving opening 11.

[0047] To form a positive connection with the clamping sleeve 20, the rotary sensor 30 has a rotary sensor projection 31 that projects radially outwards with respect to the longitudinal axis L. The width of the rotary sensor projection in the circumferential direction corresponds to the width of the slot 21, which is Figure 2 This will be explained in more detail below, in order to form a positive locking connection for the rotation-proof retention of the rotary sensor 30 in the clamping sleeve 20. The rotary sensor 30 is therefore only to be inserted into the clamping sleeve 20 to the extent that the rotary sensor projection 31 has an overlap area with the slot 21.

[0048] The formation of the slot 21 of the clamping sleeve 20 for the positive engagement of the rotary sensor projection 31 is shown. Figure 2 a cross-sectional view of the receiving device 10 with the clamping sleeve 20 mounted in the receiving opening 11 according to Figure 1in a section plane perpendicular to the longitudinal axis L. Even though the clamping sleeve 20 is shown here as spaced apart from the receiving opening 11, it is to be understood as being frictionally connected to the receiving opening 11. Alternatively, it can also be provided that the frictional connection only occurs upon insertion of the rotary sensor 30 and the associated spreading of the clamping sleeve 20. The slot 21 is bounded on its opposite sides, which extend in the direction of the longitudinal axis L, by angled end sections 22 of the clamping sleeve 20, which extend radially inwards with respect to the longitudinal axis L. Compared to non-angled end sections, the area of ​​positive locking between the rotary sensor projection 31 and the end sections 22 is thereby offset radially inwards in the direction of the longitudinal axis according to the length and angle of the end sections 22. This compensates for tolerances in the radial direction.Provided that the angled end sections are designed to be deformable, i.e., can be moved in the circumferential direction in the opposite direction to the slot 21, a tolerance compensation in the width direction of the radial rotary sensor projection 31 can also be carried out.

[0049] The invention is not limited to the described embodiments, but to the present claims. Even if the slot 21 is continuous according to the first embodiment, it can only be provided over a predetermined insertion path from the side for the insertion of the rotary sensor 30. The end of such a slot can thus be used as a stop for the rotary sensor 30 or the radial rotary sensor projection 31 in a predetermined application position or as an other insertion limiter. Furthermore, the described features can be combined with one another as desired, provided they are not mutually exclusive. For example, the spring elements 24 can alternatively or additionally apply a radially inwardly directed spring force and / or also be used as an assembly aid if, for instance, the circumferential surface of the receiving opening 11 has corresponding spring element receptacles. REFERENCE MARK LIST

[0050] 1 Rotary sensor assembly 10 Mounting device 11 Mounting opening 20 Clamping sleeve 20a Sheath surface 21 Slot 22 Inwardly angled end section 23 Clamping sleeve projection 24 Spring element 25 Mounting aid 30 Rotary sensor 31 Rotary sensor projection 100 Rotary sensor system Longitudinal axis

Claims

1. A clamping sleeve (20) for mounting a rotation sensor (30) in a receiving opening (11) provided in a receiving device (10) and having a longitudinal axis (L) around which a lateral surface (20a) of the clamping sleeve extends at least in sections in the direction of the longitudinal axis (L), the clamping sleeve (20) being designed to be inserted at least in sections into the receiving opening (11) and to be held therein with frictional engagement, characterized in that the clamping sleeve (20) is also designed to correspond to the rotation sensor (30) to be mounted, so that a positive fit can be formed between the rotation sensor (30) and the clamping sleeve (20) when the rotation sensor (30) is inserted into the clamping sleeve (20), wherein the clamping sleeve (20) has a slot (21) in the direction of the longitudinal axis (L), at least in sections, which slot is open at least on a side facing the rotation sensor (30) during mounting, and wherein the slot (21) has on both sides extending in the direction of the longitudinal axis (L), at least in sections, a radially inwardly set end section (22), which are designed to form the positive fit between the rotation sensor (30) and the clamping sleeve (20) with a rotation sensor projection (31) of the rotation sensor (30).

2. The clamping sleeve (20) according to claim 1, wherein the inwardly set end section (22) is designed to be elastic or resilient.

3. The clamping sleeve (20) according to any one of the preceding claims, wherein the clamping sleeve (20) has a clamping sleeve projection (23) on an axial end section with respect to the longitudinal axis (L) at least in sections, which projection projects radially outwards with respect to the longitudinal axis (L).

4. The clamping sleeve (20) according to any one of the preceding claims, wherein the clamping sleeve (20) has at least one spring element (24) on its lateral surface (20a).

5. The clamping sleeve (20) according to any one of the preceding claims, wherein the clamping sleeve (20) has a mounting aid (25) for position-oriented mounting in the receiving opening (11).

6. The clamping sleeve (20) according to claim 5, wherein the mounting aid (25) is formed from a mandrel projecting from the receiving opening (11) in the application position with a spirit level attached thereto.

7. The clamping sleeve (20) according to claim 5 or 6, wherein the assembly aid (25) is formed from a mandrel with a template attached thereto.

8. The clamping sleeve (20) according to any one of claims 5 to 7, wherein the mounting aid (25) forms a positive fit with the receiving device (10).

9. The clamping sleeve according to any one of claims 5 to 8, wherein the mounting aid (25) is detachably connected to the clamping sleeve (20).

10. A rotation sensor arrangement (1), having: a clamping sleeve (20) according to any one of claims 1 to 9 and a rotation sensor (30), which is designed to be inserted into the clamping sleeve (20) at least in sections in the direction of the longitudinal axis (L), wherein the rotation sensor (30) has, at least in sections, a rotation sensor projection (31) which projects radially outwards in relation to the longitudinal axis (L), so that when the rotation sensor (30) is inserted into the clamping sleeve (20), a positive fit can be formed between the rotation sensor (30) and the clamping sleeve (20) via the rotation sensor projection (31).

11. The rotation sensor arrangement (1) according to claim 10, wherein the rotation sensor projection (31) extends in the direction of the longitudinal axis (L) at least over a section which forms the positive fit with the clamping sleeve in a predetermined application position.

12. A rotation sensor system (100), having: a clamping sleeve (20) according to any one of claims 1 to 9, a rotation sensor (30) according to the rotation sensor arrangement (1) according to claim 10 or 11, and a receiving device (10) with at least one receiving opening (11) which extends in the direction of the longitudinal axis (L), wherein the clamping sleeve is held at least by frictional engagement and the rotation sensor (30) is held in a non-rotatable manner at least by positive fit with the clamping sleeve (20) in the receiving opening (11).

13. The rotation sensor system (100) according to claim 12, wherein the receiving opening (11) is a passage opening in the direction of the longitudinal axis (L).