Tension sensor

Abstract

The invention discloses a tension sensor, which belongs to the technical field of sensors and comprises a first shell, a second shell, a fixed seat and a mounting seat. Wherein a pushing mechanism and a locking mechanism are arranged in the first shell, the pushing mechanism comprises a fixed cylinder, a movable cylinder is arranged in the fixed cylinder, and the movable cylinder is driven by the second driving piece to push the second shell. The locking mechanism comprises a threaded cylinder, and the threaded cylinder is driven by the first driving piece to lock the first shell and the second shell. The second shell is connected into the first shell in a sliding mode, the second shell is provided with an opening facing upwards, a deformation element is fixed in the opening, and a strain gauge is arranged on the deformation element. The fixed seat is fixed on the deformation element; the mounting seat is arranged on the fixed seat, and a fixed bearing capable of rotating at multiple degrees of freedom is arranged on the fixed seat. The deviation rectifying device has the advantages that the second shell can be pushed by the pushing mechanism to move relative to the first shell, and then deviation rectifying can be conducted on the roller shaft fixed to the second shell.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sensors, in particular to a tension sensor. BACKGROUND

[0002] The tension sensor is widely used in the industrial production fields of printing, textile and the like, and its core measurement principle is that when an external force acts on the sensor, a slight deformation of the internal elastic body occurs, the strain gauge pasted on the surface of the elastic body is deformed together, and then the resistance value is changed; subsequently, the resistance change is converted into a voltage signal through a Wheatstone bridge, and the voltage signal is linearly corresponding to the size of the tension, so that the accurate measurement of the tension can be completed by collecting and analyzing the signal.

[0003] In actual application scenarios, the tension sensor is usually used in a paired configuration, and needs to be matched with a bearing seat and a roller shaft to work cooperatively; when the detected materials such as printed matter and textile pass around the roller shaft, a corresponding pressure is generated on the roller shaft, the pressure is sequentially transmitted to the bearing seat, and finally acts on the tension sensor to realize measurement.

[0004] However, in the material winding process, the materials are easily affected by external environmental factors to cause folding, deviation and the like, which can cause the pressure of the materials acting on the roller shaft to deviate or be biased, and then the force transmitted to the tension sensor is abnormal, and finally the tension measurement result is inaccurate. The existing tension sensor generally lacks an effective adjustment mechanism for such pressure deviation or bias, and it is difficult to cope with the problem of insufficient measurement accuracy. SUMMARY

[0005] In view of the above technical deficiencies, the purpose of the present application is to provide a tension sensor to solve the defects that the roller shaft deviates, and the tension sensor cannot be adjusted in time to cause the tension measurement to deviate.

[0006] To solve the above technical problems, the present application adopts the following technical scheme: the present application provides a tension sensor, comprising: a first shell, a pushing mechanism and a locking mechanism are arranged in the first shell; a second shell, the second shell is slidingly connected in the first shell, the second shell has an opening facing upward, a deformation element is fixed in the opening, and a strain gauge is arranged on the deformation element; a fixed seat, the fixed seat is fixed on the deformation element; a mounting seat, the mounting seat is arranged on the fixed seat, and a fixed bearing with multiple degrees of freedom is arranged on the fixed seat; wherein the pushing mechanism comprises a fixed cylinder, an activity cylinder is arranged in the fixed cylinder, and the activity cylinder is driven by a second driving piece to push the second shell; the locking mechanism comprises a threaded cylinder, the threaded cylinder is driven by a first driving piece to lock the first shell and the second shell.

[0007] Optionally, the first shell comprises a cavity accommodating the second shell, and operation cavities located on both sides of the cavity, a first sliding rail is arranged on the end face of the inner wall of the cavity, a second sliding rail is arranged on the top end face of the first shell, a partition plate is fixed in each operation cavity, the partition plate divides each operation cavity into two driving chambers, a fixing plate fixed on the driving chamber is further arranged on the first shell, and a first through hole is formed in the fixing plate.

[0008] Optionally, a first sliding groove is formed in the second shell, a sliding buckle is slidably connected in the first sliding groove, the sliding buckle is slidably connected to the first sliding rail, a second sliding groove matched with the second sliding rail is further formed in the second shell, and a plurality of second through holes are fixed in the second shell.

[0009] Optionally, a screwing cavity is formed in the second sliding rail, a plurality of locking cavities communicated with the screwing cavity are further formed in the second sliding rail, a screwing piece is arranged in the screwing cavity, a screwing ball is arranged in the locking cavity, and a plurality of grooves are formed in the second shell.

[0010] Optionally, the screwing piece has a first threaded part at both ends, the screwing piece is threadedly connected to the screwing cavity through the first threaded part, the screwing piece has a convex part and a concave part, and the screwing piece at least includes the following states when being screwed: a first state, in which the convex part abuts against the screwing ball, and in the first state, the screwing ball is clamped between the groove and the locking cavity; and a second state, in which the screwing ball is arranged between the locking cavity and the concave part, and in the second state, the second shell has a displacement amount in the vertical direction compared with the first shell.

[0011] Optionally, a through groove penetrating through both ends is formed in the partition plate, a fixed cylinder is fixed in the through groove, a movable cylinder is slidably connected in the fixed cylinder, and the push mechanism further comprises a threaded rod, one end of the threaded rod is connected to the second driving piece, the other end of the threaded rod has a second threaded part and a third threaded part, and the second threaded part and the third threaded part are threadedly connected to the fixed cylinder and the movable cylinder respectively.

[0012] Optionally, the second threaded part and the third threaded part have different pitches.

[0013] Optionally, the locking mechanism comprises a first shaft body and a second shaft body arranged in the two drive cavities respectively, the first shaft body is connected with the first drive member through a bevel gear set, the first shaft body and the second shaft body are driven through a gear set, and the first shaft body and the second shaft body are both threadedly connected with a threaded cylinder, the threaded cylinder has a displacement amount in the vertical direction compared with the first shaft body and the second shaft body, and at least comprises the following states: a third state, the threaded cylinder passes through the second through hole and is clamped in one of the first through holes; a fourth state, the top end of the threaded cylinder is higher or lower than the horizontal height of the fixed plate.

[0014] Optionally, the bevel gear set comprises a first bevel gear and a second bevel gear meshing with each other, the first bevel gear is fixed on the first shaft body, and the second bevel gear is connected to the first drive member. The gear set comprises a first gear and a second gear fixed on the first shaft body and the second shaft body respectively, the connecting rod is fixed on the partition plate, the connecting rod is sleeved outside the first shaft body and the second shaft body, and the third shaft body is fixed, the third gear is rotatably connected to the third shaft body, and the third gear is meshed with the first gear and the second gear respectively.

[0015] Optionally, the mounting seat comprises a bearing seat fixed on the fixed seat, the first drive ring is rotatably connected to the bearing seat, the first drive ring has a rotation amount in the first direction, the second drive ring is rotatably connected in the first drive ring, the second drive ring has a rotation amount in the second direction, the first direction is perpendicular to the second direction, and the fixed bearing is fixed in the second drive ring.

[0016] The present application has the following advantages: The present application has the following advantages: The second shell, the deformation element, the strain gauge and other key components supporting the operation of the sensor are arranged in the second shell, the first shell and the second shell are connected through a sliding buckle, and the second shell is provided with a stable displacement basis. The second shell is controlled to displace relative to the first shell through the sliding cooperation of the movable cylinder and the fixed cylinder and the accurate driving of the second drive member, and the displacement amount depends on the distance between the outer side wall of the second shell and the inner side wall of the first shell. The relative positions of the sensors on both sides of the roller shaft can be flexibly adjusted according to the deviation of the material during the winding process, the roller shaft can be adaptively inclined, the folding and deviation of the material can be effectively corrected, the material can always adhere to the central region of the roller shaft, the pressure of the material on the roller shaft can be uniformly transmitted to the deformation element, the strain gauge can accurately capture the deformation signal, the tension measurement deviation caused by the pressure deviation can be avoided, and the stable and accurate collection of the tension parameter can be realized.

[0017] Meanwhile, the locking mechanism of the application is matched with the first and second through hole structures of the first and second housings to form a reliable locking fit. When the sensor is in normal operation, the threaded barrel of the locking mechanism is clamped between the first and second through holes, which can effectively limit the relative displacement of the first and second housings in the horizontal direction, providing stable structural support for the operation of the sensor and ensuring the stability of the measurement process. When the position of the housing needs to be adjusted, the locking mechanism is unlocked by the driving member, so that the threaded barrel is separated from the through hole fit state, which clears the structural obstacles for the displacement adjustment of the second housing, realizes the flexible switching of the locking and adjustment states, and takes into account the stability of the equipment operation and the convenience of the adjustment.

[0018] In addition, the application optimizes the matching structure of the second sliding groove and the second sliding rail. The position of the rotating ball is accurately controlled by the convex and concave parts of the rotating member, which can realize the locking or flexible adjustment of the vertical displacement of the second sliding groove and the second sliding rail, i.e. the corresponding structure of installation and disassembly. This structure design makes the displacement of the equipment in the vertical direction stable, further strengthens the connection stability of the first and second housings, and does not affect the displacement adjustment of the second and first housings in the horizontal direction. Furthermore, it ensures the structural integrity and operation reliability of the equipment under complex working conditions.

[0019] In summary, the application provides a complete material offset self-adaptive adjustment structure by the relatively movable first and second housings, and the push mechanism, locking mechanism and sliding groove and rail structure. With the aid of an automatic control system, the structure can timely and accurately cope with the offset problem during the material winding process, realize active deviation correction, solve the measurement deviation problem caused by the lack of effective adjustment mechanism in traditional sensors, and significantly improve the accuracy, stability and adaptability of tension measurement. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0021] Figure 1 A perspective view of a tension sensor according to the application Figure 1 .

[0022] Figure 2 A perspective view of a tension sensor according to the application Figure 2 .

[0023] Figure 3 A partial exploded view of a tension sensor according to the application.

[0024] Figure 4 This is a simplified schematic diagram showing the connection between the second slide rail and the second slide groove of a tension sensor according to the present invention.

[0025] Figure 5 The simplified cross-section of the connection between the second slide rail and the second slide groove of the tension sensor of the present invention is shown below. Figure 1 .

[0026] Figure 6 The simplified cross-section of the connection between the second slide rail and the second slide groove of the tension sensor of the present invention is shown below. Figure 2 .

[0027] Figure 7 This is a simplified cross-sectional view of the screwing component of a tension sensor according to the present invention.

[0028] Figure 8 This is a three-dimensional cross-sectional schematic diagram of the second housing of a tension sensor according to the present invention.

[0029] Figure 9 This invention provides a tension sensor. Figure 8 Enlarged view of point A in the middle.

[0030] Figure 10 This is a cross-sectional schematic diagram of the pushing mechanism of a tension sensor according to the present invention.

[0031] Figure 11 This is a three-dimensional structural diagram of a locking mechanism for a tension sensor according to the present invention.

[0032] Figure 12 This is a three-dimensional structural diagram of a mounting base for a tension sensor according to the present invention.

[0033] Figure 13 This is a perspective view of the first housing of a tension sensor according to the present invention.

[0034] Explanation of reference numerals in the attached figures: 1, first shell; 11, first slide rail; 12, second slide rail; 121, screwing cavity; 122, locking cavity; 123, screwing part; 1231, first threaded part; 1232, convex part; 1233, concave part; 124, screwing ball; 13, fixed plate; 131, first through hole; 14, partition plate; 15, driving chamber; 2, second shell; 21, first sliding groove; 22, second sliding groove; 221, groove; 23, sliding buckle; 24, second through hole; 3, fixed seat; 4, mounting seat; 41, bearing seat; 42, first driving ring; 43, second driving ring; 44, fixed bearing; 5, pushing mechanism; 51, movable cylinder; 52, fixed cylinder; 53, threaded rod; 531, second threaded part; 532, third threaded part; 54, second driving part; 6, locking mechanism; 61, first bevel gear; 62, second bevel gear; 63, first shaft body; 64, second shaft body; 65, third shaft body; 66, first gear; 67, second gear; 68, third gear; 69, threaded cylinder; 610, connecting rod; 611, first driving part. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0036] As described above, in the material winding process, the material is prone to folding, deviation and other situations affected by external environmental factors, which can cause the pressure of the material acting on the roller shaft to deviate or deviate, and then the force transmitted to the tension sensor to be abnormal, and finally the inaccuracy of the tension measurement result. At present, the existing tension sensor generally lacks effective adjustment mechanism for such pressure deviation or deviation, and it is difficult to cope with the problem of insufficient measurement accuracy.

[0037] In view of this, the present application provides a tension sensor, which can timely correct the deviated material in the material winding process through a material deviation correction self-adaptive adjustment mechanism, thereby ensuring the accuracy and stability of tension measurement. The present application is solved by the following way.

[0038] Embodiment one: Please refer to the drawings in the specification, as shown in the figure, the present application provides a tension sensor, which includes a first shell 1 as shown in Figures 1 to 3 , and a second shell 2 arranged in the first shell 1.

[0039] The first shell 1 is fixed on a support surface (for example, the surface of a device) by a screw nut, and has a cavity with an opening facing upward (for the convenience of description, the side of the first shell 1 away from the support surface is defined as upward, and the side close to the support surface is defined as downward, and the corresponding left and right sides and front and back sides are defined, and the directions are only preferred embodiments of the present application, and thus cannot be interpreted as a limitation of the present application). The cavity is used to accommodate the second shell 2, and when the second shell 2 enters the cavity, the left and right outer wall surfaces of the second shell 2 have a distance (i.e. a moving redundancy) from the left and right wall surfaces of the cavity, and the front and back wall surfaces of the second shell 2 are attached to the front and back wall surfaces of the cavity. The front and back wall surfaces of the inner wall of the cavity of the first shell 1 are provided with first sliding rails 11, and the front and back walls on the top end surface of the first shell 1 are provided with second sliding rails 12.

[0040] Meanwhile, the left and right sides of the first shell 1 are provided with protruding parts, and the protruding parts are provided with operation cavities (as shown in Figure 3 or Figure 8 ) inside. A partition plate 14 is fixed in the operation cavities, and the partition plate 14 is a certain distance away from the bottom surface of the operation cavities, and divides the operation cavities into front and back drive chambers 15. The operation cavities also have an upward opening, and a fixed plate 13 is fixed in the opening, and the center of the fixed plate 13 is provided with a first through hole 131.

[0041] As shown in Figures 1 to 3 , in the present embodiment, the second shell 2 has an upward opening, and a deformation element is arranged in the opening, and a strain gauge is arranged on the deformation element. A fixed seat 3 is fixed on the top of the deformation element, and a mounting seat 4 is fixed on the top end surface of the fixed seat 3. In use, two tension sensors are arranged opposite to each other and fixed on a fixed surface, and then a roller shaft is mounted on the mounting seat 4, and the roller shaft is used to wind or conduct materials. The materials form a pressure on the roller shaft during winding or conducting, and the pressure is conducted from the roller shaft to the mounting seat 4 and acts on the sensor. At this time, the internal deformation element is slightly deformed, and the strain gauge pasted on the surface of the deformation element is deformed together, thereby causing a change in resistance value. Then, the resistance change is converted into a voltage signal by a Wheatstone bridge, and the voltage signal has a linear corresponding relationship with the size of the tension, and the signal is collected and analyzed, thereby completing the accurate measurement of the tension. Since the above-mentioned pressure measurement sensor technology is prior art, its technical principle will not be described here.

[0042] As shown in Figure 3As shown in the first embodiment, the front and rear end faces of the second shell 2 are each provided with a first sliding groove 21 arranged transversely, and each first sliding groove 21 is slidably connected with not less than two sliding buckles 23, and the sliding buckles 23 are slidably connected with the first sliding rails 11, so that the second shell 2 has a displacement amount in the vertical direction when connected with the first shell 1. Meanwhile, the second shell 2 is also provided with a second sliding groove 22 used in cooperation with the second sliding rails 12. The second sliding rails 12 are provided with a mechanism for locking the second sliding groove 22. The two sides of the second shell 2 are also provided with protruding parts, and a plurality of second through holes 24 are arranged in an array on the protruding parts.

[0043] Therefore, in use, first, the position of the sliding buckles 23 in the first sliding grooves 21 is adjusted, and when the second shell 2 is aligned with the first shell 1, the sliding buckles 23 are synchronously aligned with the first sliding rails 11, and then the second shell 2 is pressed into the first shell 1 in the downward direction, and the sliding buckles 23 slide on the first sliding rails 11. At this time, the second sliding groove 22 is close to the second sliding rails 12. Until the second shell 2 contacts the inner wall bottom surface of the first shell 1, at this time, the second sliding groove 22 is slidably buckled into the second sliding rails 12, and then the mechanism in the second sliding rails 12 is operated, so that the second sliding groove 22 is locked on the second sliding rails 12 and cannot move in the vertical direction, at this time, the second shell 2 is locked in the vertical direction compared with the first shell 1.

[0044] Then, the second shell 2 is adjusted to the appropriate position in the first shell 1 in the horizontal direction, and the second through holes 24 are aligned with the first through holes 131 at this position. The locking mechanism 6 arranged in the driving chamber 15 is driven, so that the mechanism locks the positions of the first through holes 131 and the second through holes 24, at this time, the second shell 2 is locked in the horizontal direction compared with the first shell 1. At this time, the sensor is completed to be installed, and then can be deployed and operated.

[0045] When the material on the roller shaft connected with the tension sensor deviates, the locking mechanism 6 is driven to be unlocked with the first through holes 131 and the second through holes 24. At this time, the first shell 1 and the second shell 2 can be displaced in the horizontal direction. The pushing mechanism 5 in the first shell 1 is driven again, and the pushing mechanism 5 pushes the second shell 2 to move in the first shell 1, and finally realizes the horizontal displacement adjustment of the second shell 2 and the fixed seat 3 and the mounting seat 4 thereon, so as to realize the inclination of the roller shaft, and finally correct the material thereon.

[0046] Embodiment two: Based on the above embodiment, in order to further clearly and completely explain the technical solutions therein, the present application also provides an embodiment two. As Figures 4 to 7As shown, in this embodiment, the second slide rail 12 consists of two parts, both of which are integrally formed. The lower part is welded to the top end face of the first housing 1, while the upper part is welded to the lower part after all internal components are installed. After installation, the upper and lower parts of the second slide rail 12 fit together to form a rotating cavity 121 that extends laterally through the second housing 2. Figure 4 The diagram shown is only a simplified schematic of its partial structure, and includes several locking cavities 122 that are perpendicularly connected to the screwing cavity 121. One end of the locking cavity 122 is connected to the screwing cavity 121, and the other end is connected to the outside. Both ends of the locking cavity 122 have a constriction design.

[0047] like Figures 4 to 7 As shown, in this embodiment, a screwing component 123 is provided inside the screwing cavity 121. The screwing component 123 has first threaded portions 1231 at both ends, and is threaded into the screwing cavity 121 through these first threaded portions 1231. The screwing component 123 has a protrusion 1232 and a recess 1233, both of which are covered with a flexible friction buffer layer, such as silicone. A screwing ball 124 is provided inside the locking cavity 122, and the screwing ball 124 also has a flexible friction buffer layer, such as silicone. Several grooves 221 are provided on the second housing 2. In use, the screwing component 123 moves within the screwing cavity 121 during screwing, and at least includes the following states: In the first state, the protrusion 1232 abuts against the screw ball 124. In this first state, the screw ball 124 is engaged between the groove 221 and the locking cavity 122, and the second slide rail 12 and the second slide groove 22 are vertically locked.

[0048] In the second state, the screw ball 124 is located between the locking cavity 122 and the recess 1233. In this second state, the second housing 2 has a vertical displacement relative to the first housing 1.

[0049] In this second embodiment, as Figure 6 One preferred embodiment shown is that the aforementioned locking cavities 122 are interconnected. This interconnection forms a single, continuous locking cavity 122, and the lateral distance between the interconnected locking cavities 122 is greater than the distance between the two furthest rotating balls 124. When the second housing 2 is horizontally adjusted within the first housing 1, the rotating balls 124 roll within the locking cavity 122. Thus, in the first state, the vertical line between the second slide rail 12 and the second slide groove 22 is locked, but there is a horizontal movement, which can accommodate the position adjustment of the second housing 2 within the first housing 1.

[0050] Example 3: Based on the above embodiment, in order to further clearly and completely explain the technical solutions therein, the present application further provides embodiment three. As shown in Figures 8 to 10 The push mechanism 5 includes a fixed cylinder 52 fixed in the through groove of the partition plate 14, and a movable cylinder 51 slidingly connected in the fixed cylinder 52. The push mechanism 5 further includes a threaded rod 53, one end of which is connected to the second driving member 54, and the other end of which has a second threaded member 531 and a third threaded member 532, which are respectively threadedly connected to the fixed cylinder 52 and the movable cylinder 51.

[0051] Therefore, in the specific implementation of the third embodiment, the second driving member 54 (which can be a knob adjusted by a person, or a motor or an electric motor driven automatically. When it is a motor or an electric motor, the motor or the electric motor should follow the displacement of the threaded rod 53 when driving the threaded rod 53 to rotate. Since this is prior art, the technical principle will not be described again here) drives the threaded rod 53. Under the action of the second threaded member 531, the threaded rod 53 moves relative to the fixed cylinder 52, driving the third threaded member 532 and the movable cylinder 51 to move relative to the fixed cylinder 52. At the same time, the threaded rod 53 rotates, and the third threaded member 532 drives the movable cylinder 51 to move under the influence of the thread. Therefore, under certain space and speed, the moving speed of the movable cylinder 51 is greater than that of the threaded rod 53.

[0052] In the third embodiment, one preferred embodiment is that the second threaded member 531 and the third threaded member 532 have different pitches.

[0053] The distance is explained, for example, the pitch of the second threaded member 531 is a, and the pitch of the third threaded member 532 is b, b = 2a. In this way, when the threaded rod 53 rotates one circle, the threaded rod 53 moves a distance relative to the fixed cylinder 52, and the movable cylinder 51 moves b distance relative to the threaded rod 53. Because b = 2a, the moving speed of the movable cylinder 51 is faster than that of the threaded rod 53, realizing differential movement. Finally, the second shell 2 is pushed to move in the first shell 1.

[0054] Embodiment four: Based on the above embodiment, in order to further clearly and completely explain the technical solutions therein, the present application further provides embodiment four. As shown in Figure 3 , Figure 11 , Figure 13 In the fourth embodiment,

[0055] The locking mechanism 6 comprises a first shaft body 63 and a second shaft body 64 arranged in the two driving chambers 15 respectively, the first shaft body 63 is connected with the first driving member 611 through a bevel gear set, the bevel gear set comprises a first bevel gear 61 and a second bevel gear 62 which are engaged with each other, the first bevel gear 61 is fixed on the first shaft body 63, and the second bevel gear 62 is connected to the first driving member 611 (the first driving member 611 can be a knob adjusted manually, or can be a motor or a motor driven automatically, when it is a motor or a motor, it can be controlled and operated uniformly by the control module like the second driving member 54, so as to realize automatic adjustment. The method of automatic adjustment is also prior art, which will not be described here).

[0056] The first shaft body 63 and the second shaft body 64 are driven through a gear set, the gear set comprises a first gear 66 and a second gear 67 fixed on the first shaft body 63 and the second shaft body 64 respectively, the connecting rod 610 is fixed on the partition plate 14, the connecting rod 610 is sleeved on the first shaft body 63 and the second shaft body 64, and the third shaft body 65 is fixed, the third gear 68 is rotatably connected to the third shaft body 65, and the third gear 68 is engaged with the first gear 66 and the second gear 67 respectively.

[0057] The first shaft body 63 and the second shaft body 64 are both threadedly connected with a threaded cylinder 69, the threaded cylinder 69 is provided with a convex strip on the outer periphery, and the first through hole 131 is provided with a notch for clamping the convex strip. When the first driving member 611 is driven, the first shaft body 63 is driven to rotate through the bevel gear set, and then the second shaft body 64 is driven to rotate through the gear set. At this time, the threaded cylinder 69 threadedly connected with the first shaft body 63 and the second shaft body 64 has a displacement amount in the vertical direction compared with the first shaft body 63 and the second shaft body 64, and at least includes the following states: The third state is that the threaded cylinder 69 penetrates through the second through hole 24 and is clamped in one of the first through holes 131, in this state, the threaded cylinder 69 locks the displacement of the first shell 1 and the second shell 2 in the horizontal direction.

[0058] The fourth state is that the top end of the threaded cylinder 69 is higher or lower than the horizontal height of the fixed plate 13, in this fourth state, the first shell 1 and the second shell 2 have a displacement amount in the horizontal direction.

[0059] Example five: Based on the above embodiments, in order to further clearly and completely explain the technical solutions, the present application also provides example five. As Figure 12As shown in the fifth embodiment, the mounting seat 4 comprises a bearing seat 41 fixed on the fixed seat 3, the bearing seat 41 is rotationally connected with a first driving ring 42, the first driving ring 42 has a rotation amount in a first direction (vertical direction), the first driving ring 42 is rotationally connected with a second driving ring 43 inside, the second driving ring 43 has a rotation amount in a second direction (horizontal direction), the first direction and the second direction are perpendicular, and a fixed bearing 44 is fixed in the second driving ring 43. This makes the fixed bearing 44 adapt to the tilt of the roller shaft. In turn, it meets the needs of correction.

[0060] Therefore, in summary, the present application and its various embodiments have the following advantages compared to the prior art, including but not limited to: The present application has a second shell 2 located in the first shell 1, and the key components supporting the operation of the sensor such as the deformation element and the strain gauge are integrated in the second shell 2. The second shell 2 is connected and matched with the first shell 1 through the sliding buckle 23, providing a stable displacement basis for the second shell 2. The push mechanism 5 realizes the controllable displacement of the second shell 2 relative to the first shell 1 through the sliding cooperation of the movable cylinder 51 and the fixed cylinder 52 and the precise driving of the second driving member 54, and the displacement amount depends on the distance between the outer side wall of the second shell 2 and the inner side wall of the first shell 1. This design can flexibly adjust the relative position of the sensors on both sides of the roller shaft according to the deviation of the material winding process, make the roller shaft produce adaptive tilt, effectively correct the folding and deviation of the material, ensure that the material always adheres to the central area of the roller shaft, and ensure that the pressure of the material on the roller shaft is uniformly transmitted to the deformation element, so that the strain gauge can accurately capture the deformation signal, avoid the tension measurement deviation caused by the pressure deviation, and realize the stable and accurate collection of the tension parameter.

[0061] At the same time, the locking mechanism 6 of the present application is matched with the first through hole 131 and the second through hole 24 of the first shell 1 and the second shell 2, forming a reliable locking cooperation relationship. When the sensor is running normally, the threaded cylinder 69 of the locking mechanism 6 is clamped between the first through hole 131 and the second through hole 24, which can effectively limit the relative displacement of the first shell 1 and the second shell 2 in the horizontal direction, provide stable structural support for the operation of the sensor, and ensure the stability of the measurement process; when the shell position needs to be adjusted, the first driving member 611 drives the locking mechanism 6 to unlock, so that the threaded cylinder 69 is separated from the through hole cooperation state, which clears the structural obstacles for the displacement adjustment of the second shell 2, realizes the flexible switching of the locking and adjustment states, and takes into account the stability of the equipment operation and the convenience of the adjustment.

[0062] In addition, the application optimizes the matching structure of the second sliding groove 22 and the second sliding rail 12. The position of the rotating ball 124 is accurately controlled through the convex part 1232 and the concave part 1233 of the rotating part 123, so that the vertical displacement of the second sliding groove 22 and the second sliding rail 12 can be locked or flexibly adjusted, that is, the corresponding structure of installation and disassembly. The structure design makes the displacement of the equipment in the vertical direction stable, further strengthens the connection stability of the first shell 1 and the second shell 2, and does not affect the displacement adjustment of the second shell 2 and the first shell 1 in the horizontal direction. Further, the structural integrity and operation reliability of the equipment under complex working conditions are ensured.

[0063] In summary, the application constructs a complete material offset adaptive adjustment structure through the first shell 1 and the second shell 2 that can relatively move, and the top pushing mechanism 5, the locking mechanism 6, and the second sliding groove 22 and the second sliding rail 12 structure. With the aid of an automatic control system, the structure can timely and accurately deal with the offset problem during the material winding process, actively correct the deviation, solve the measurement deviation problem caused by the lack of effective adjustment mechanism of the traditional sensor, and significantly improve the accuracy, stability and adaptability of the tension measurement.

[0064] Obviously, those skilled in the art can make various modifications and variations to the application without departing from the spirit and scope of the application. Therefore, if these modifications and variations of the application belong to the scope of the application and its equivalent technology, the application also intends to include these modifications and variations.

Claims

1. A tension sensor, characterized in that, include: The first housing (1) is provided with a pushing mechanism (5) and a locking mechanism (6). The second housing (2) is slidably connected to the first housing (1). The second housing (2) has an opening facing upward, in which a deformation element is fixed, and a strain gauge is provided on the deformation element. Fixing base (3), the fixing base (3) is fixed on the deformation element; Mounting base (4), the mounting base (4) is provided on the fixed base (3), and the fixed base (3) is provided with a fixed bearing (44) with multiple degrees of freedom of rotation. The pushing mechanism (5) includes a fixed cylinder (52), and a movable cylinder (51) is provided inside the fixed cylinder (52). The movable cylinder (51) is driven by the second driving member (54) to push the second housing (2). The locking mechanism (6) includes a threaded cylinder (69), which is driven by a first driving member (611) to lock the first housing (1) and the second housing (2).

2. A tension sensor as described in claim 1, characterized in that, The first housing (1) includes a cavity for accommodating the second housing (2) and operating cavities located on both sides of the cavity. A first slide rail (11) is provided on the inner wall end face of the cavity, and a second slide rail (12) is provided on the top end face of the first housing (1). A partition (14) is fixed in each operating cavity, and the partition (14) divides each operating cavity into two driving chambers (15). A fixing plate (13) is also provided on the first housing (1) and fixed on the driving chamber (15). A first through hole (131) is opened on the fixing plate (13).

3. A tension sensor as described in claim 2, characterized in that, The second housing (2) is provided with a first sliding groove (21), and a sliding buckle (23) is slidably connected in the first sliding groove (21). The sliding buckle (23) is slidably connected to the first slide rail (11). The second housing (2) is also provided with a second sliding groove (22) that cooperates with the second slide rail (12). The second housing (2) is fixed with a plurality of second through holes (24).

4. A tension sensor as described in claim 3, characterized in that, The second slide rail (12) has a screwing cavity (121) inside, and the second slide rail (12) also has a number of locking cavities (122) communicating with the screwing cavity (121). The screwing cavity (121) has a screwing component (123) inside, and the locking cavity (122) has a screwing ball (124) inside. The second housing (2) has a number of grooves (221).

5. A tension sensor as described in claim 4, characterized in that, The screwing component (123) has a first threaded portion (1231) at both ends. The screwing component (123) is threadedly connected to the screwing cavity (121) through the first threaded portion (1231). The screwing component (123) has a protrusion (1232) and a recess (1233). The screwing component (123) has at least the following states when screwed: In the first state, the protrusion (1232) abuts against the screw ball (124), and in the first state, the screw ball (124) is engaged between the groove (221) and the locking cavity (122); In the second state, the screw ball (124) is located between the locking cavity (122) and the recess (1233). In this second state, the second housing (2) has a vertical displacement relative to the first housing (1).

6. A tension sensor as described in claim 2, characterized in that, The partition (14) has a through groove with both ends through it. The fixed cylinder (52) is fixed in the through groove. The movable cylinder (51) is slidably connected in the fixed cylinder (52). The pushing mechanism (5) also includes a threaded rod (53). One end of the threaded rod (53) is connected to the second driving member (54), and the other end has a second threaded part (531) and a third threaded part (532). The second threaded part (531) and the third threaded part (532) are respectively threaded to the fixed cylinder (52) and the movable cylinder (51).

7. A tension sensor as described in claim 6, characterized in that, The second threaded part (531) and the third threaded part (532) have different pitches.

8. A tension sensor as described in claim 5, characterized in that, The locking mechanism (6) includes a first shaft (63) and a second shaft (64) respectively disposed in the two drive chambers (15). The first shaft (63) is connected to the first drive member (611) through a bevel gear set. The first shaft (63) and the second shaft (64) are driven by a gear set. Both the first shaft (63) and the second shaft (64) are threadedly connected to a threaded cylinder (69). The threaded cylinder (69) has a vertical displacement relative to the first shaft (63) and the second shaft (64), and includes at least the following states: In the third state, the threaded cylinder (69) passes through the second through hole (24) and is engaged in one of the first through holes (131); In the fourth state, the height of the top of the threaded cylinder (69) is higher or lower than the horizontal height of the fixed plate (13).

9. A tension sensor as described in claim 8, characterized in that, The bevel gear set includes a first bevel gear (61) and a second bevel gear (62) that mesh with each other. The first bevel gear (61) is fixed on the first shaft (63), and the second bevel gear (62) is connected to the first drive member (611). The gear set includes a first gear (66) and a second gear (67) fixed on a first shaft (63) and a second shaft (64) respectively. A connecting rod (610) is fixed on the partition plate (14). The connecting rod (610) is sleeved on the first shaft (63) and the second shaft (64) and a third shaft (65) is fixed thereon. A third gear (68) is rotatably connected to the third shaft (65). The third gear (68) meshes with the first gear (66) and the second gear (67) respectively.

10. A tension sensor as described in claim 1, characterized in that, The mounting base (4) includes a bearing seat (41) fixed on the fixed base (3). The bearing seat (41) is rotatably connected to a first drive ring (42). The first drive ring (42) has a rotation amount in a first direction. A second drive ring (43) is rotatably connected inside the first drive ring (42). The second drive ring (43) has a rotation amount in a second direction. The first direction and the second direction are perpendicular. The fixed bearing (44) is fixed inside the second drive ring (43).

Images