Tension sensor
By designing a tension sensor with an adjustment ring and bearing sleeve, the automatic adaptation of the strain gauge deformation direction and tension direction is achieved, and the problem of disassembly and resetting changes in the tension direction in the prior art is solved, and the accuracy and convenience of measurement are improved.
Patent Information
- Application Number
- CN202510131137.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-06
- Publication Date
- 2025-03-28
AI Technical Summary
Existing tension sensors can only measure tension in one direction. If the tension direction changes, it is very inconvenient to disassemble the sensor and readjust the deformation direction of the strain gauge.
A tension sensor including a housing, an adjustment ring and a bearing sleeve is designed. Through the eccentric through grooves and slide grooves on the adjustment ring, and the slide blocks on the bearing sleeve, the automatic adaptation of the strain gauge deformation direction and the tension direction is achieved.
The deformation direction of the strain gauge can be adapted to the tension direction without disassembling the sensor, which improves the accuracy and convenience of tension measurement.
Smart Images
Figure CN119714653A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of tension measurement, and in particular to a tension sensor. Background Art
[0002] The tension sensor is a special sensor for measuring the tension of strips. It is specially used to measure the tension or pressure of films, textiles or paper during transportation and winding. The working principle of the tension sensor is based on the resistance strain principle. When the strain gauge is subjected to tension or pressure, the strain gauge will undergo a slight deformation, resulting in a change in resistance value, thereby realizing the measurement of force. The change in resistance value is amplified and processed by the circuit, and finally converted into an electrical signal output proportional to the force.
[0003] Existing tension sensors can usually only measure tension in one direction. If the direction of tension changes, the proportional relationship between the deformation of the strain gauge and the tension will change, resulting in inaccurate measurement. The tension sensor needs to be disassembled and reassembled to make the deformation direction of the strain gauge correspond to the direction of tension, which is very inconvenient. Summary of the invention
[0004] In view of the above-mentioned technical deficiencies, an object of the present invention is to provide a tension sensor capable of adapting the deformation direction of the strain gauge to the tension direction without disassembling the tension sensor.
[0005] In order to solve the above technical problems, the present invention adopts the following technical solution: The present invention provides a tension sensor, comprising:
[0006] A housing, the housing comprising an outer ring and an inner ring arranged inside the outer ring, wherein the axial thickness of the outer ring is greater than the axial thickness of the inner ring;
[0007] A bearing sleeve, wherein a self-aligning ball bearing is installed in the bearing sleeve, two symmetrical sliding blocks are arranged on the circumferential side wall of the bearing sleeve, two C-shaped through grooves are symmetrically opened on the bearing sleeve, the two C-shaped through grooves surround the self-aligning ball bearing, a mounting groove is opened at the end of the C-shaped through groove, a strain beam is arranged between two adjacent mounting grooves, and a strain gauge is arranged on the strain beam;
[0008] An adjusting ring, the adjusting ring is rotatably mounted in the inner ring, an eccentric through groove for mounting the bearing sleeve is provided in the adjusting ring, two slide grooves communicating with the eccentric through groove are provided on the adjusting ring, and two sliders are slidably mounted in the two slide grooves respectively;
[0009] Wherein, a locking mechanism for locking the position of the adjusting ring on the inner ring is provided on the adjusting ring.
[0010] Preferably, the locking mechanism comprises:
[0011] A toothed ring portion, wherein the toothed ring portion is disposed on the inner edge of the inner ring;
[0012] A limiting tooth, wherein the limiting tooth is fixed on one of the sliders;
[0013] When the limiting tooth abuts against one of the tooth grooves of the toothed ring portion, the adjusting ring loses the freedom to rotate in the inner ring.
[0014] Preferably, a locking groove is provided on the adjustment ring, a locking block is slidably installed in the locking groove, a locking hole matching with the locking block is provided on one of the sliders, and a spring is provided in the locking groove on the side of the locking block away from the locking hole; when the limiting tooth abuts against the tooth groove, the locking block is inserted into the locking hole.
[0015] Preferably, a retaining ring 1 is threadedly mounted on the adjusting ring, and the retaining ring 1 is used to limit the axial movement of the bearing sleeve.
[0016] Preferably, a shifting hole is formed on the retaining ring, and a shifting rod extending out of the shifting hole is fixed on the locking block.
[0017] Preferably, an annular inner groove is formed at one end of the inner ring, and an annular outer protrusion matching with the annular inner groove is provided at one end of the adjustment ring.
[0018] Preferably, a second retaining ring is bolted onto one end of the inner ring close to the inner annular groove, and the second retaining ring restricts the outer annular protrusion in the inner annular groove.
[0019] Preferably, the adjusting ring is provided with radially distributed blind holes, and a second spring for lifting the bearing sleeve is arranged in the blind hole.
[0020] Preferably, the outer ring is provided with an aviation plug electrically connected to the strain gauge.
[0021] Preferably, two grooves for installing a retaining ring are provided on the inner side wall of the bearing sleeve, and the self-aligning ball bearing is located between the two grooves.
[0022] The beneficial effects of the present invention are:
[0023] The present invention designs an adjusting ring and a bearing sleeve, wherein an eccentric through groove and a slide groove are provided on the adjusting ring, and a slider slidably installed in the slide groove is provided on the bearing sleeve. Through the displacement of the slider and the rotation of the adjusting ring, the deformation direction of the strain gauge in the bearing sleeve can be made coincident with the force direction of the self-aligning ball bearing, thereby improving the measurement accuracy of the tension sensor; by designing a locking mechanism, when the slider moves to a certain extent in the slide groove, the limiting tooth is stuck in the tooth groove of the tooth ring part, and the locking block is stuck in the locking hole under the action of a spring, so that the limiting tooth remains in a state of being against the tooth groove, thereby maintaining the locking state of the adjusting ring and the inner ring, and maintaining the relatively fixed state of the bearing sleeve and the adjusting ring, thereby increasing the stability of the rotating shaft during rotation. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0025] Figure 1 A three-dimensional diagram of the overall structure of a tension sensor provided by an embodiment of the present invention.
[0026] Figure 2 It is a front view of the present invention.
[0027] Figure 3 for Figure 2 Cross-sectional view at AA in the middle.
[0028] Figure 4 It is a schematic diagram of the limiting tooth of the present invention being clamped on the gear ring part.
[0029] Figure 5 It is a schematic diagram of the limiting tooth of the present invention when it is not engaged with the toothed ring portion.
[0030] Figure 6 It is a three-dimensional view when the limiting tooth of the present invention does not abut against the gear ring part.
[0031] Figure 7 This is a rear-view stereoscopic diagram when the retaining ring 2 is omitted in the present invention.
[0032] Figure 8 It is a rear-view perspective stereogram of the present invention.
[0033] Description of reference numerals:
[0034] 1. Housing, 2. Outer ring, 3. Inner ring, 4. Bearing sleeve, 5. Self-aligning ball bearing, 6. Slider, 7. C-type through groove, 8. Mounting groove, 9. Strain beam, 10. Strain gauge, 11. Adjustment ring, 12. Eccentric through groove, 13. Slide groove, 14. Gear ring, 15. Limiting tooth, 16. Locking groove, 17. Locking block, 18. Locking hole, 19. Spring 1, 20. Retaining ring 1, 21. Drag hole, 22. Drag lever, 23. Annular inner groove, 24. Annular outer convex part, 25. Retaining ring 2, 26. Blind hole, 27. Spring 2, 28. Aviation plug, 29. Slot. DETAILED DESCRIPTION
[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0036] Embodiment 1:
[0037] like Figures 1 to 8 As shown, the first embodiment of the present invention provides a tension sensor, which can change the orientation of the strain gauge 10 relative to the housing 1, so that the tension sensor can match the tension measurement work at various angles without repeated disassembly and assembly. The tension sensor designed by the present invention includes a housing 1, an adjustment ring 11 and a bearing sleeve 4. The housing 1 is composed of an outer ring 2 and an inner ring 3. The outer ring 2 and the inner ring 3 are integrally formed. The outer ring 2 is wrapped around the outer side of the inner ring 3, and the axial thickness of the outer ring 2 is designed to be greater than the axial thickness of the inner ring 3. Such a design enhances the structural strength of the housing 1 and facilitates the arrangement and fixation of internal components.
[0038] The adjusting ring 11 is rotatably mounted on the inner side of the inner ring 3. An eccentric through groove 12 is designed inside the adjusting ring 11 to accommodate the bearing sleeve 4. The self-aligning ball bearing 5 is fixedly mounted inside the bearing sleeve 4 to accommodate slight deviations in the installation position, ensuring that the axis of the rotating shaft to be measured is aligned and the operation is smooth. Two sliders 6 are symmetrically fixed on the circumferential side wall of the bearing sleeve 4. Two slide grooves 13 cooperating with the sliders 6 are provided on the adjusting ring 11. The sliders 6 can move along the slide grooves 13, thereby realizing fine adjustment of the radial position of the bearing sleeve 4 on the adjusting ring 11. Figure 4As shown, in order to detect tension changes, two C-shaped through grooves 7 are symmetrically opened on the bearing sleeve 4. The two C-shaped through grooves 7 are arranged around the self-aligning ball bearing 5, and the ends thereof are further opened with mounting grooves 8 for mounting strain gauges 10. The bearing sleeve 4 between two adjacent mounting grooves 8 forms a strain beam 9. The strain gauge 10 is attached to the strain beam 9. When the rotating shaft installed on the self-aligning ball bearing 5 is compressed, the strain beam 9 will be slightly deformed, causing the resistance of the strain gauge 10 to change, converting the tension into an electrical signal, and realizing tension measurement.
[0039] like Figure 4 and Figure 5 As shown, although the slider 6 can move in the slide groove 13, the self-aligning ball bearing 5 is always in the eccentric position of the adjustment ring 11. When the rotating shaft on the self-aligning ball bearing 5 is under pressure, the slider 6 will move in the slide groove 13, and the adjustment ring 11 will also rotate, so that the line connecting the center of the adjustment ring 11 and the center of the self-aligning ball bearing 5 coincides with the pressure direction, thereby ensuring that the line connecting the two strain beams 9 coincides with the pressure direction and ensuring the accuracy of the tension measurement. The use of a locking mechanism to fix the adjustment ring 11 to the inner ring 3 can maintain the tension measurement direction and prevent the bearing sleeve 4 from shaking.
[0040] Embodiment 2:
[0041] On the basis of the first embodiment, in order to ensure that the adjustment ring 11 can be stable and immobile after being adjusted to the desired position, the locking mechanism designed by the present invention includes a toothed ring portion 14 processed on the inner edge of the inner ring 3 and a limiting tooth 15 fixed on one of the sliders 6. Figure 4 As shown, when the slider 6 slides to the point where the limiting tooth 15 is just embedded in a tooth groove of the tooth ring portion 14, the adjusting ring 11 is locked and cannot rotate in the inner ring 3. In addition, in order to prevent the limiting tooth 15 from automatically disengaging from the tooth groove, the present invention further provides a locking groove 16 on the adjusting ring 11, in which a locking block 17 is slidably installed, and a locking hole 18 is correspondingly provided on one of the sliders 6. A spring 19 is provided in the locking groove 16 on the side of the locking block 17 away from the locking hole 18. In this way, when the slider 6 moves in the slide groove 13 and the limiting tooth 15 is against the tooth groove, the spring 19 pushes the locking block 17 to insert into the locking hole 18, so that the limiting tooth 15 cannot disengage from the tooth groove, thereby stabilizing the position of the adjusting ring 11.
[0042] When the orientation of the strain gauge 10 needs to be re-determined, the lever 22 on the locking block 17 is simply moved to pull the locking block 17 out of the locking hole 18, thereby releasing the locking state of the limiting tooth 15 and the tooth groove, allowing the limiting tooth 15 to be separated from the tooth groove, thereby allowing the adjusting ring 11 to rotate freely. Figure 3As shown, in order to allow the limiting tooth 15 to easily disengage from the tooth groove, the present invention provides radially distributed blind holes 26 on the adjusting ring 11, and a spring 27 is arranged in the blind hole 26. When the locking block 17 disengages from the locking hole 18, the bearing sleeve 4 can be lifted up under the action of the spring 27, so that the limiting tooth 15 disengages from the tooth groove, and the rotational freedom of the adjusting ring 11 is restored.
[0043] Embodiment three:
[0044] In order to limit the axial movement of the bearing sleeve 4, the present invention installs a retaining ring 20 on the adjusting ring 11 by bolts, and the retaining ring 20 can play a limiting role and constrain the slider 6 in the slide groove 13. The retaining ring 20 is also provided with a shifting hole 21 that matches with the shifting rod 22 on the locking block 17, so that the shifting rod 22 can be manually shifted to operate the unlocking and locking of the locking block 17.
[0045] like Figure 3 As shown, the end of the inner ring 3 away from the retaining ring 1 20 is designed with an annular inner groove 23, and the end of the adjusting ring 11 is provided with an annular outer protrusion 24 that can be stuck in the annular inner groove 23. This design enhances the stability and assembly accuracy of the structure. The end of the inner ring 3 close to the annular inner groove 23 is installed with a retaining ring 25 by bolts. The retaining ring 25 effectively restricts the annular outer protrusion 24 in the annular inner groove 23, preventing the adjusting ring 11 from detaching from the inner ring 3, and further enhancing the stability of the structure.
[0046] Finally, in order to fix the self-aligning ball bearing 5, two grooves 29 are opened on the inner wall of the bearing sleeve 4 for installing the retaining spring. The self-aligning ball bearing 5 is located between the two grooves 29. The two retaining springs limit the axial movement of the self-aligning ball bearing 5, ensuring the stable installation and operation of the bearing.
[0047] In order to ensure the reliability and convenience of signal transmission, an aviation plug 28 is provided on the outer ring 2 and is electrically connected to the strain gauge 10 .
[0048] Working principle: When in use, first fix the housing 1 on the frame, and then fix the rotating shaft whose tension is to be measured in the self-aligning ball bearing 5. When a roll of material such as a film or cloth rotates on the rotating shaft, the rotating shaft is affected by the tension of the roll, causing the originally eccentric bearing sleeve 4 to slide, and the sliding block 6 slides in the slide groove 13 to further deviate the center of the bearing sleeve 4 from the center of the adjustment ring 11, so that the line between the center of the bearing sleeve 4 and the center of the adjustment ring 11 gradually coincides with the direction of the pressure on the rotating shaft. At the same time, the limiting teeth 15 gradually snap into the tooth grooves of the tooth ring part 14, so that the adjustment ring 11 cannot continue to rotate, thereby maintaining the coincidence state between the pressure direction of the rotating shaft and the deformation direction of the strain gauge 10, thereby improving the accuracy of tension measurement.
[0049] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.
Claims
1. A tension sensor, characterized in that: include: A housing (1), the housing (1) comprising an outer ring (2) and an inner ring (3) arranged inside the outer ring (2), the axial thickness of the outer ring (2) being greater than the axial thickness of the inner ring (3); A bearing sleeve (4), wherein a self-aligning ball bearing (5) is installed in the bearing sleeve (4), two symmetrical sliding blocks (6) are arranged on the circumferential side wall of the bearing sleeve (4), two C-shaped through grooves (7) are symmetrically provided on the bearing sleeve (4), the two C-shaped through grooves (7) surround the self-aligning ball bearing (5), a mounting groove (8) is provided at the end of the C-shaped through groove (7), a strain beam (9) is arranged between two adjacent mounting grooves (8), and a strain gauge (10) is arranged on the strain beam (9); An adjusting ring (11), the adjusting ring (11) is rotatably mounted in the inner ring (3), an eccentric through groove (12) for mounting the bearing sleeve (4) is provided in the adjusting ring (11), two slide grooves (13) connected to the eccentric through groove (12) are provided on the adjusting ring (11), and two sliders (6) are slidably mounted in the two slide grooves (13) respectively; Wherein, a locking mechanism for locking the position of the adjusting ring (11) on the inner ring (3) is provided on the adjusting ring (11).
2. A tension sensor as claimed in claim 1, characterized in that: The locking mechanism comprises: A toothed ring portion (14), wherein the toothed ring portion (14) is disposed on the inner edge of the inner ring (3); A limiting tooth (15), wherein the limiting tooth (15) is fixed on one of the sliders (6); When the limiting tooth (15) abuts against one of the tooth grooves of the toothed ring portion (14), the adjusting ring (11) loses the freedom to rotate in the inner ring (3).
3. A tension sensor as claimed in claim 2, characterized in that: The adjusting ring (11) is provided with a locking groove (16), a locking block (17) is slidably installed in the locking groove (16), a locking hole (18) cooperating with the locking block (17) is provided on one of the sliders (6), and a spring (19) is arranged in the locking groove (16) on the side of the locking block (17) away from the locking hole (18); when the limiting tooth (15) abuts against the tooth groove, the locking block (17) is inserted into the locking hole (18).
4. A tension sensor as claimed in claim 3, characterized in that: A retaining ring (20) is threadedly mounted on the adjusting ring (11), and the retaining ring (20) is used to limit the axial movement of the bearing sleeve (4).
5. A tension sensor as claimed in claim 4, characterized in that: The first retaining ring (20) is provided with a shifting hole (21), and the locking block (17) is fixed with a shifting rod (22) extending out of the shifting hole (21).
6. A tension sensor as claimed in claim 1, characterized in that: An annular inner groove (23) is formed at one end of the inner ring (3), and an annular outer protrusion (24) matching the annular inner groove (23) is formed at one end of the adjustment ring (11).
7. A tension sensor as claimed in claim 6, characterized in that: A second retaining ring (25) is boltedly mounted on one end of the inner ring (3) close to the annular inner groove (23), and the second retaining ring (25) restricts the annular outer protrusion (24) in the annular inner groove (23).
8. A tension sensor as claimed in claim 1, characterized in that: The adjusting ring (11) is provided with radially distributed blind holes (26), and a second spring (27) for lifting the bearing sleeve (4) is arranged in the blind hole (26).
9. A tension sensor as claimed in claim 1, characterized in that: The outer ring (2) is provided with an aviation plug (28) electrically connected to the strain gauge (10).
10. A tension sensor as claimed in claim 1, characterized in that: Two retaining grooves (29) for installing retaining rings are provided on the inner side wall of the bearing sleeve (4), and the self-aligning ball bearing (5) is located between the two retaining grooves (29).