CN214309223U - Tension detection device - Google Patents

Abstract

A tension detecting device is used for detecting tension applied to a bundling element. This pulling force detection device includes: the tension-compression conversion assembly is used for converting tension applied to the bundling element into pressure; and the pressure sensor is correspondingly arranged and used for measuring the pressure converted by the tension-compression conversion assembly so as to obtain the tension applied to the bundling element, so that the bundling element can be prevented from binding the fuel cell stack too tightly or too loosely.

Description

Tension detection device

Technical Field

The utility model relates to a fuel cell technical field especially relates to a pulling force detection device.

Background

A fuel cell is a power generation device that directly converts chemical energy in fuel into electrical energy through an electrochemical reaction. However, a single fuel cell (or fuel cell) can provide a lower voltage and lower output power. In practical applications, a plurality of fuel cells are generally stacked together to form a fuel cell stack capable of achieving high voltage and high power output. Accordingly, a fuel cell stack of a fuel cell is formed by stacking a plurality of fuel cell cells together.

The fuel cell stack of the fuel cell needs to maintain stable structure during use so as to ensure that the fuel cell maintains stable and continuous power output. The fuel cell stack of the existing fuel cell is usually fixed together by fastening means, such as screw fixing, the fuel cell units of the stacked fuel cell stack. However, when the fuel cells stacked together simply are directly fixed together, uneven stress is easily applied to each part of the fuel cell stack. The uneven stress on each part of the fuel cell stack may affect the sealing performance and the power transmission performance of the fuel cell stack, and ultimately the power output of the fuel cell stack. In addition, the uneven stress on each part of the fuel cell stack may cause the flow field plate of the fuel cell stack to deform due to the local over-stress, and even cause the damage of the proton exchange membrane, which results in the failure of the fuel cell stack. Therefore, the conventional fuel cell stack often needs to be pressed by a pressing machine before being fixed, so that the fuel cells of the fuel cell stack are tightly stacked together to ensure the sealing performance of the fuel cell stack.

An existing fuel cell automatic stacking device generally includes a stacking mechanism, a moving-out mechanism, a manipulator and a control mechanism, and the fuel cell automatic stacking device can move through a guide rail arranged on a workbench through a stacking rack of the stacking mechanism, so that a tightening rack of the stacking mechanism can align with a fuel cell stack arranged on a mounting table of the stacking mechanism and compress the fuel cell stack arranged on the mounting table of the stacking mechanism, and the compressed fuel cell stack is fixed together in a screw fixing manner.

However, when the fuel cell automatic stacking device is fixed by the screw, the compressed fuel cell stack is fixed together by manual operation with a special tool (such as a wrench), which results in low assembly efficiency and high cost of the fuel cell stack; in addition, in order to ensure the structural stability of the fuel cell stack, a plurality of pairs of screws are often required to be used for fastening, but the problem of uneven stress is aggravated because the fastening force of the plurality of screws is difficult to be consistent, in particular, the fastening force of each screw is difficult to detect, and once the fastening force of the screws is different, the fuel cell unit is easy to warp or deform, so that the sealing performance of the fuel cell stack cannot be ensured.

SUMMERY OF THE UTILITY MODEL

An advantage of the present invention is to provide a tension detecting device, which can detect the tension of the bundling element, so as to prevent the bundling element from binding up the fuel cell stack too tightly or too loosely.

Another advantage of the present invention is to provide a tension detecting device, wherein, in an embodiment of the present invention, the tension detecting device can detect the tension applied to the bundling elements at different bundling positions on the fuel cell stack, so as to ensure that the bundling force of all the bundling elements is consistent, and the stress applied to different bundling positions on the fuel cell stack is uniform.

Another advantage of the present invention is to provide a tension detecting device, wherein in an embodiment of the present invention, the tension detecting device can skillfully convert the tension received by the bundling element into pressure, so as to obtain the tension received by the bundling element through the pressure sensor, which helps to reduce the difficulty of detecting the tension received by the bundling element.

Another advantage of the present invention is to provide a tension detecting device, wherein in an embodiment of the present invention, the tension detecting device can equally convert the tension received by the bundling element into pressure, so that the pressure directly measured by the pressure sensor is equal to the tension received by the bundling element, thereby omitting the solving process of the tension received by the bundling element.

Another advantage of the present invention is to provide a tension detecting device, wherein, in order to achieve the above object, the present invention does not need to adopt expensive materials or complex structures. Therefore, the utility model discloses succeed in and provide a solution effectively, not only provide simple pulling force detection device, still increased simultaneously pulling force detection device's practicality and reliability.

In order to realize above-mentioned at least one advantage or other advantages and purposes, the utility model provides a tension detection device for detect the pulling force that ties up the component and receive, wherein tension detection device includes:

the tension-compression conversion assembly is used for converting tension applied to the bundling element into pressure; and

and the pressure sensor is correspondingly arranged and used for measuring the pressure converted by the tension-compression conversion assembly so as to obtain the tension applied to the bundling element.

According to one embodiment of the application, the tension-compression switching assembly includes a first limiting mechanism for limiting the strapping element from passing through a first limiting position, a second stop mechanism for limiting the passage of the tying element from a second stop position, and a press mechanism for guiding the tying element from a press position, wherein the pressure-bearing mechanism is correspondingly arranged between the first limiting mechanism and the second limiting mechanism, the first limit position, the second limit position and the pressure bearing position are arranged in a triangular shape, for bending the strapping element at the bearing position to exert a pressure on the bearing means, so that the pulling force applied to the binding element is converted into the pressure applied to the pressure-bearing mechanism, the pressure sensor is correspondingly arranged on the pressure bearing mechanism and used for measuring the pressure applied to the pressure bearing mechanism.

According to an embodiment of the application, the distance between the first limit position and the bearing position is equal to the distance between the second limit position and the bearing position.

According to an embodiment of the present application, the tension detecting apparatus further includes a detecting frame, wherein the tension-compression converting assembly and the pressure sensor are correspondingly disposed on the detecting frame to form a stand-alone apparatus with a tension detecting function.

According to an embodiment of the present application, the first limiting mechanism includes a first limiting wheel, and the first limiting wheel is correspondingly mounted to the detecting frame to define the first limiting position by an outer periphery of the first limiting wheel; the second limiting mechanism comprises a second limiting wheel, and the second limiting wheel is correspondingly installed on the detection frame so as to limit the second limiting position through the outer periphery of the second limiting wheel.

According to an embodiment of the application, the first stop mechanism further comprises a first guide wheel, and the first guide wheel and the first stop wheel are arranged at a distance to form a first guide channel between the first guide wheel and the first stop wheel for guiding the bundling element passing through the first guide channel into contact with an outer circumference of the first stop wheel to define the first stop position; wherein the second stop mechanism further comprises a second guide wheel and the second stop wheel are spaced apart to form a second guide channel between the second guide wheel and the second stop wheel for guiding the bundling element passing through the second guide channel into contact with the outer periphery of the second stop wheel to define the second stop position.

According to an embodiment of the application, the height of the first guide channel and the height of the second guide channel are both equal to the thickness of the bundling element.

According to an embodiment of the application, the first limiting mechanism further comprises a first guide wheel, and the first guide wheel is correspondingly arranged for guiding the trend of the bundling element penetrating from the first guide channel; wherein the second limiting mechanism further comprises a second guide wheel, and the second guide wheel is correspondingly arranged for guiding the trend of the bundling element which passes out of the second guide channel.

According to an embodiment of the application, the first limiting wheel, the first guiding wheel and the first guiding wheel are arranged in a triangular shape, and the first guiding wheel is located between the first limiting wheel and the first guiding wheel; wherein the second limiting wheel, the second guiding wheel and the second guiding wheel are arranged in a triangular shape, and the second guiding wheel is positioned between the second limiting wheel and the second guiding wheel.

According to an embodiment of the present application, the first limiting wheel is a first fixed pulley mounted on the detecting frame, and the second limiting wheel is a second fixed pulley mounted on the detecting frame.

According to an embodiment of the present application, the first limiting mechanism further includes a guide frame, wherein the guide frame is rotatably mounted to the detecting frame with a rotating shaft of the first fixed pulley as an axis, and the first guide wheel are rotatably mounted to the guide frame, wherein the second guide wheel and the second guide wheel are rotatably mounted to the detecting frame.

According to an embodiment of the present application, the bearing mechanism of the tension-compression conversion assembly includes a bearing base and a bearing wheel, wherein the bearing base is slidably disposed on the detection frame, and the bearing wheel is correspondingly disposed on the bearing base, wherein the pressure sensor is correspondingly disposed on the bearing base, and the bearing base is located between the pressure sensor and the bearing wheel to define the bearing position through an outer periphery of the bearing wheel.

According to an embodiment of the present application, the bearing base has a bearing end and a measuring end, wherein the pressure sensor is correspondingly disposed at the measuring end of the bearing base, and the bearing wheel is rotatably disposed at the bearing end of the bearing base.

According to an embodiment of the present application, the bearing base further has a rolling groove disposed at the bearing end, wherein the bearing wheel is a roller, and the roller is partially exposed and placed in the rolling groove of the bearing base to roll in the rolling groove.

According to an embodiment of the present application, the bearing mechanism further includes a plurality of balls, wherein the plurality of balls are rollably disposed in the rolling groove between an inner wall of the rolling groove and the roller.

According to an embodiment of the present application, the bearing base further includes a stopper cover having an opening, wherein the stopper cover covers the rolling groove to partially cover the rolling groove to restrict a position of the plurality of balls, and a portion of the roller is exposed from the opening of the stopper cover.

According to an embodiment of the present application, the sensing frame has a sliding groove extending in a direction in which the strapping element applies the pressure to the pressure wheel, and the pressure-receiving base is slidably provided to the sliding groove to slide along the sliding groove.

According to an embodiment of the application, the pressure sensor comprises a sensing element and a conversion element, wherein the sensing element is convexly arranged on the conversion element, and the sensing element is contacted with the measuring end of the bearing base and is used for sensing the strain of the bearing base, and the conversion element is used for converting the strain sensed by the sensing element into a corresponding electric signal so as to output a corresponding pressure value; the bearing base is further provided with a containing groove arranged at the measuring end, and the containing groove is used for containing the head part of the sensitive element of the pressure sensor in a contact mode, so that the tail part of the sensitive element is exposed out of the containing groove.

Further objects and advantages of the invention will be fully apparent from the ensuing description and drawings.

These and other objects, features and advantages of the present invention will become more fully apparent from the following detailed description, the accompanying drawings and the appended claims.

Drawings

Fig. 1 is a schematic perspective view of an in-line apparatus for assembling a fuel cell stack according to an embodiment of the present application.

Fig. 2 shows a partially enlarged schematic view of the in-line apparatus for assembling a fuel cell stack according to the above-described embodiment of the present application.

Fig. 3 is a schematic application diagram of a tension detection device according to an embodiment of the present application.

Fig. 4 shows an enlarged schematic view of the tension detecting device according to the above-described embodiment of the present application.

Fig. 5 shows a schematic perspective view of the tension detection device according to the embodiment of the present application.

Fig. 6 shows an exploded view of the tension detecting device according to the embodiment of the present application.

Fig. 7 shows a schematic cross-sectional view of the tension detecting device according to the embodiment of the present application.

Fig. 8 and 9 are schematic views showing states of the tension detecting device according to the embodiment of the present application.

Fig. 10 and 11 are schematic flow charts of a tension detection method according to an embodiment of the present application.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents and other technical solutions without departing from the spirit and scope of the invention.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in a generic and descriptive sense only and not for purposes of limitation, as the terms are used in the description to indicate that the referenced device or element must have the specified orientation, be constructed and operated in the specified orientation, and not for the purpose of limitation.

In the present application, the terms "a" and "an" in the claims and the description should be understood as meaning "one or more", that is, one element or a plurality of elements may be included in one embodiment or a plurality of elements may be included in another embodiment. The terms "a" and "an" and "the" and similar referents are to be construed to mean that the elements are limited to only one element or group, unless otherwise indicated in the disclosure.

In the description of the present invention, it is to be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

In order to solve the problems or defects caused by the screw fixation of the existing fuel cell automatic stacking device, as shown in fig. 1 and 2, the present application provides a flow line device for assembling a fuel cell stack, which can stack a plurality of fuel cell units 801 into a fuel cell stack 800 at a stacking station through a stacking device 2; the stacked fuel cell stack 800 is conveyed to a bundling station through a conveying device 3; finally, after the fuel cell stack 800 is pressed to compress the plurality of fuel cells 801 by the bundling device 4, the fuel cell stack 800 is tightly bundled by the bundling member 70, so that the parts of the fuel cell stack 800 are uniformly stressed.

However, since the binding member 70 is generally implemented as a long band, a wire rope or a wire rope, so that the binding member 70 is generally wound on a reel 5 for use, when the fuel cell stack 800 is tightly bound using the binding member 70, it is necessary to manually rotate the reel forward to partially release the binding member 70 for encircling the fuel cell stack 800, and manually rotate the reel backward to roll the binding member 70 for tightening the binding member 70 to tightly bind the fuel cell stack 800. However, such reverse rotation of the reel 5 by manual rotation to tension the strapping element 70 requires a lot of labor and increases labor costs, and also causes difficulty in tensioning the strapping element 70 to meet the requirement of strapping the fuel cell stack 800 due to limited manpower. In particular, the strapping element 70 is typically made of a metal or alloy material. Preferably, the strapping element 70 is made of a metal or alloy material having a yield strength of not less than 206Mpa, which makes the strapping element 70 more difficult to artificially tighten, easily causing the fuel cell stack 800 to be unable to be tightly bundled together by the strapping element 70.

To increase the tightening force on the strapping element 70, as shown in fig. 1 and 2, the present application may mount the reel 5 directly to the driving device 6 to rotate the reel in reverse by the driving of the driving device 6 to roll the strapping element 70, thereby tightening the strapping element 70 to meet the strapping requirements of the fuel cell stack 800. In particular, in order to keep the bundling force of the fuel cell stack 800 at different bundling positions consistent and uniform, it is necessary to ensure that all of the bundling elements 70 are uniformly pulled when bundling the fuel cell stack 800 at the different bundling positions. In addition, since the reel is reversely rotated by the driving of the driving device to pull the binding element 70, it is necessary to prevent the binding element 70 from being subjected to too much tension to damage the fuel cell stack 800 or too small to tightly bind the fuel cell stack 800, and therefore, the application needs to detect the tension applied to the binding element 70. However, since the binding element 70 is wound on the reel and the reel 5 is driven by the driving means 6 to rotate in reverse to tighten the binding element 70, it is difficult for the binding element 70 to directly measure by the tension sensor. Therefore, in order to solve the above problems, the present application inventively provides a tension detecting device, which is suitable for being applied to the above assembly line equipment for assembling a fuel cell stack to detect the tension applied to the strapping element 70.

Referring to fig. 3 to 9 of the drawings of the present application, a tension detecting device according to an embodiment of the present invention is illustrated for detecting a tension applied to a bundling element 70. Specifically, as shown in fig. 3, the tension detecting device 1 may include a tension-compression converting assembly 10 and a pressure sensor 20, wherein the tension-compression converting assembly 10 is configured to convert tension applied to the binding element 70 into pressure, and the pressure sensor 20 is configured to measure the pressure converted by the tension-compression converting assembly 10 to obtain the tension applied to the binding element 70.

More specifically, as shown in fig. 4, the tension-compression converting assembly 10 may include a first limiting mechanism 11, a second limiting mechanism 12 and a pressing mechanism 13, wherein the first limiting mechanism 11 is used for limiting the binding element 70 from passing through a first limiting position 110, and the second limiting mechanism 12 is used for limiting the binding element 70 from passing through a second limiting position 120, wherein the pressing mechanism 13 is correspondingly arranged between the first limiting mechanism 11 and the second limiting mechanism 12, and the pressing mechanism 13 is used for guiding the binding element from passing through a pressing position 130, wherein the first limiting position 110, the second limiting position 120 and the pressing position 130 are arranged in a triangle shape, and the binding element 70 sequentially passing through the first limiting position 110, the pressing position 130 and the second limiting position 120 is bent at the pressing position 130 to apply pressure to the pressing mechanism 13, so that the pulling force to which the strapping element 70 is subjected is converted into a pressure to which the pressure-bearing means 13 is subjected. Meanwhile, the pressure sensor 20 is correspondingly provided to the pressure receiving mechanism 13, and measures the magnitude of the pressure received by the pressure receiving mechanism 13, and further determines the magnitude of the tensile force received by the tying element 70 according to the magnitude of the pressure received by the pressure receiving mechanism 13.

It is noted that, since, when the reel is reversely rotated by the driving of the driving means to take up the binding element 70, the strapping element 70 passes through the first limiting position 110, the bearing position 130 and the second limiting position 120 in sequence to be bent into a V-shape at the bearing position 130, at this time, the pulling force on the strapping element 70 from the bearing position 130 to the first limiting position 110 and the pulling force on the strapping element 70 from the bearing position 130 to the second limiting position 120 will form a resultant force at the bearing position 130 to apply a pressure to the bearing mechanism 13, therefore, by analyzing the force applied at the pressure-bearing position 130, the magnitude of the pulling force applied to the bundling element 70 can be calculated according to the magnitude of the pressure applied to the pressure-bearing mechanism 13, so as to achieve the purpose of detecting the pulling force of the bundling element 70.

Preferably, the magnitude of the pressure applied by the pressure applying mechanism 13 is exactly equal to the magnitude of the pulling force applied by the binding element 70, so as to avoid the step of solving the magnitude of the pulling force applied by the binding element 70 according to the magnitude of the pressure applied by the pressure applying mechanism 13.

More preferably, the distance between the first limiting position 110 and the bearing position 130 is equal to the distance between the second limiting position 120 and the bearing position 130, so that the first limiting position 110, the second limiting position 120 and the bearing position 130 are arranged in an isosceles triangle, to ensure that the extension length of the strapping element 70 between the first limiting position 110 and the bearing position 130 is equal to the extension length of the strapping element 70 between the second limiting position 120 and the bearing position 130, and to facilitate the assembly of the tension detecting device 1.

According to the above-mentioned embodiment of the present application, as shown in fig. 3 to 5, the tension detecting device 1 may further include a detecting frame 30, wherein the tension-compression converting assembly 10 and the pressure sensor 20 are correspondingly mounted to the detecting frame 30 to form a separate device having a tension detecting function, so that the tension detecting device 1 can be mounted to a proper position in a flow line apparatus for assembling a fuel cell stack as required. Of course, in other examples of the present application, the tension detecting device 1 may not include the detecting frame 30, but directly dispose the tension-compression converting assembly 10 and the pressure sensor 20 at appropriate positions in the assembly line equipment for assembling the fuel cell stack, and still be able to detect the tension applied to the strapping element 70.

Illustratively, as shown in fig. 3 to 7, the first limiting mechanism 11 of the tension-compression converting assembly 10 may include a first limiting wheel 111, wherein the first limiting wheel 111 is correspondingly mounted on the detecting frame 30 to define the first limiting position 110 by an outer periphery of the first limiting wheel 111, such that the bundling element 70 and the outer periphery of the first limiting wheel 111 are tangent to the first limiting position 110.

Preferably, the first limiting wheel 111 is implemented as a first fixed pulley 1110 installed on the detecting frame 30 to reduce the friction between the strapping element 70 and the first limiting wheel 111, which helps to improve the tension detecting accuracy of the tension detecting device 1. Of course, in other examples of the present application, the first limiting wheel 111 may also be directly rotatably mounted to the detecting frame 30 to form a rotating wheel, and still reduce the friction between the bundling element 70 and the first limiting wheel 111.

Similarly, the second limiting mechanism 12 of the tension-compression switching assembly 10 may include a second limiting wheel 121, wherein the second limiting wheel 121 is correspondingly installed on the detecting frame 30 to define the second limiting position 120 by the outer periphery of the second limiting wheel 121, so that the bundling element 70 and the outer periphery of the second limiting wheel 121 are tangent to the second limiting position 120.

Preferably, the second limiting wheel 121 is implemented as a second fixed pulley 1210 mounted on the detecting frame 30 to reduce the friction between the strapping element 70 and the second limiting wheel 121, which helps to further improve the tension detecting accuracy of the tension detecting device 1. Of course, in other examples of the present application, the second limiting wheel 121 may also be directly rotatably mounted to the detecting frame 30 to form a rotating wheel, and still reduce the friction between the bundling element 70 and the second limiting wheel 121.

As shown in fig. 6 and 7, the first limiting mechanism 11 of the tension/compression switching assembly 10 of the present application may further include a first guide wheel 112, wherein the first guide wheel 112 is spaced apart from the first limiting wheel 111 to form a first guide channel 1120 between the first guide wheel 112 and the first limiting wheel 111, and the bundling element 70 passing through the first guide channel 1120 is in contact with the outer periphery of the first limiting wheel 111 to define the first limiting position 110.

Similarly, the second position-limiting mechanism 12 of the tension-compression switching assembly 10 may further include a second guide wheel 122, wherein the second guide wheel 122 and the second position-limiting wheel 121 are arranged at a distance to form a second guide channel 1220 between the second guide wheel 122 and the second position-limiting wheel 121, and the bundling element 70 passing through the second guide channel 1220 is in contact with the outer periphery of the second position-limiting wheel 121 to define the second position-limiting location 120.

Preferably, the height of the first guide channel 1120 is slightly larger than the thickness of the bundling element 70, so that the bundling element 70 can be pressed while the bundling element 70 is guided to contact with the outer circumference of the first stopping wheel 111 to define the first stopping position 110, so that the bundling element 70 passing through the first guide channel 1120 is kept flat to ensure the normal operation of the tension detection device 1.

Likewise, the height of the second guide channel 1220 is slightly greater than the thickness of the bundling element 70, so that the bundling element 70 passing through the second guide channel 1220 can be kept flat while the bundling element 70 is guided into contact with the outer circumference of the second stopping wheel 121 to define the second stopping position 120, thereby ensuring the proper operation of the tension detection device 1.

More preferably, the first guide wheel 112 is correspondingly disposed on the side of the first stop wheel 111 away from the bearing location 130, such that the first stop location 110 is located between the first guide channel 1120 and the bearing location 130, thereby ensuring that the strapping element 70 passing through the first guide channel 1120 must be able to contact the outer periphery of the first stop wheel 111 to define the first stop location 110. The second guide wheel 122 is correspondingly arranged on the side of the second restraint wheel 121 remote from the bearing location 130, so that the second restraint location 120 is located between the second guide channel 1220 and the bearing location 130, thereby ensuring that the strapping element 70 passing through the second guide channel 1220 must be able to contact the outer periphery of the second restraint wheel 121 to define the second restraint location 120.

For example, the first guide wheel 112 and the second guide wheel 122 may be implemented as, but not limited to, a rotating wheel rotatably mounted on the detecting frame 30, or may also be implemented as a pulley mounted on the detecting frame 30, as long as the strapping element 70 can be guided to contact with the first limiting wheel 111 and the second limiting wheel 121, respectively.

As shown in fig. 6 and 7, the first limiting mechanism 11 of the tension/compression switching assembly 10 of the tension detecting device 1 of the present application may further include a first guide wheel 113, wherein the first guide wheel 113 is correspondingly configured to guide the trend of the strapping element 70 passing through the first guide channel 1120.

Similarly, the second limiting mechanism 12 of the tension/compression switching assembly 10 of the tension detecting device 1 may further include a second guiding wheel 123, wherein the second guiding wheel 123 is correspondingly configured to guide the direction of the bundling element 70 passing through the second guiding channel 1220.

Illustratively, the first stopping wheel 111, the first guiding wheel 112 and the first guiding wheel 113 are arranged in a triangular shape, and the first guiding wheel 112 is located between the first stopping wheel 111 and the first guiding wheel 113 so as to guide the strapping element 70 into contact with the outer periphery of the first stopping wheel 111 through the first guiding channel 1120 to define the first stopping position 110.

Similarly, the second stopping wheel 121, the second guiding wheel 122 and the second guiding wheel 123 are arranged in a triangular shape, and the second guiding wheel 122 is located between the second stopping wheel 121 and the second guiding wheel 123, so as to guide the bundling element 70 into contact with the outer circumference of the second stopping wheel 121 through the second guiding channel 1220 to define the second stopping position 120.

It is noted that the first guide wheel 113 may be, but is not limited to, implemented as a rotating wheel rotatably mounted to the inspection frame 30, and the second guide wheel 123 may be, but is not limited to, implemented as a pulley mounted to the inspection frame 30, as long as the trend of the banding element 70 can be guided as desired.

As shown in fig. 6 to 9, the binding element 70 on the reel is gradually reduced with the use of the binding element 70, so that the orientation of the binding element 70 between the first limiting mechanism 11 and the reel is changed, in order to adapt to the change of the orientation of the binding element 70, so as to avoid the binding element 70 from bending greatly at the first guide wheel 113 of the first limiting mechanism 11, the first limiting mechanism 11 of the tension/compression switching assembly 10 of the tension detecting device 1 of the present application may further include a guide frame 114, wherein the guide frame 114 is rotatably mounted to the sensing frame 30 about the rotation axis of the first fixed pulley 1110, and the first guide wheels 112 and 113 of the first stopper mechanism 11 are rotatably mounted to the guide frame 114. Thus, when the binding element 70 on the reel is gradually decreased, the binding element 70 pulls the first guide wheel 112 and the first guide wheel 113 to rotate around the rotation axis of the first fixed pulley 1110 along with the guide frame 114, preventing the binding element 70 from being greatly bent at the first guide wheel 113 of the first position-limiting mechanism 11.

It should be noted that although the first guide wheel 112 rotates along with the guide frame 114, which causes the position of the first guide wheel 112 relative to the first limiting wheel 111 to change, the gap between the first guide wheel 112 and the first fixed pulley 1110 is not changed because the first guide wheel 112 rotates around the rotating shaft of the first fixed pulley 1110, that is, the height of the first guide channel 1120 is not changed, which can still serve to flatten the strapping element 70.

According to the above-mentioned embodiment of the present application, as shown in fig. 4 to 9, the bearing mechanism 13 of the tension-compression converting assembly 10 of the tension detecting apparatus 1 may include a bearing base 131 and a bearing wheel 132, wherein the bearing base 131 is slidably disposed on the detecting frame 30, and the bearing wheel 132 is correspondingly disposed on the bearing base 131, wherein the pressure sensor 20 is correspondingly disposed on the detecting frame 30, and the bearing base 131 is located between the pressure sensor 20 and the bearing wheel 132 to define the bearing position 130 by the outer periphery of the bearing wheel 132, so that the central position where the strapping element 70 contacts with the outer periphery of the bearing wheel 132 is the bearing position 130. Thus, when the strapping element 70 is under tension to be tightened, the strapping element 70 applies pressure to the pressure-bearing wheels 132 at the pressure-bearing positions 130, and transmits the pressure applied to the pressure-bearing wheels 132 to the pressure sensor 20 through the pressure-bearing base 131, so that the pressure sensor 20 detects the tension applied to the strapping element 70 and solves the tension.

Preferably, as shown in fig. 7, the bearing base 131 has a bearing end 1311 and a measuring end 1312, wherein the pressure sensor 20 is correspondingly disposed at the measuring end 1312 of the bearing base 131, and the bearing wheel 132 is rotatably disposed at the bearing end 1311 of the bearing base 131, which helps to improve the detection accuracy of the tension detection device 1.

For example, as shown in fig. 7, the bearing base 131 further has a rolling groove 1313 disposed at the bearing end 1311, wherein the bearing wheel 132 may be implemented as a roller 1320, and the roller 1320 is partially exposed to be placed in the rolling groove 1313 of the bearing base 131 to roll in the rolling groove 1313. Of course, in other examples of the present application, the pressure-bearing wheel 132 may also be implemented as a rotating wheel, wherein the rotating wheel is directly rotatably mounted to the pressure-bearing end 1311 of the pressure-bearing base 131.

Preferably, as shown in fig. 6 and 7, the pressure-bearing mechanism 13 may further include a plurality of balls 133, wherein the plurality of balls 133 are rollably disposed in the rolling groove 1313 and located between the inner wall of the rolling groove 1313 and the roller 1320, so as to greatly reduce the friction between the roller 1320 and the rolling groove 1313, thereby helping to ensure that the strapping element 70 smoothly passes through the tension detection device 1, and further improving the detection accuracy of the tension detection device 1.

More preferably, the bearing base 131 of the bearing mechanism 13 further includes a stopper cover 1314 having an opening, wherein the stopper cover 1314 is covered on the rolling groove 1313 to partially cover the rolling groove 1313 to restrict the positions of the balls 133, and a portion of the roller 1320 is exposed from the opening of the stopper cover 1314, so as to restrict the positions of the balls 133 while ensuring that a portion of the roller 1320 is exposed outside the rolling groove 1313, to prevent the balls 133 from coming out of the rolling groove 1313. For example, the restraining cap 1314 of the pressure bearing base 131 may have a square structure.

Most preferably, the size of the opening of the stopper cover 1314 of the bearing base 131 is smaller than the diameter of the roller 1320 to restrict the position of the roller 1320 and prevent the roller 1320 from coming out of the rolling groove 1313, so that the tension detecting apparatus 1 can be disposed in a different orientation, for example, the opening of the rolling groove 1313 can face downward without worrying about the roller 1320 falling out of the rolling groove 1313.

Preferably, as shown in fig. 6 to 9, the sensing frame 30 may have a sliding groove 300, wherein the sliding groove 300 extends in a direction in which the strapping element 70 applies the pressure to the pressure receiving roller 132, and the pressure receiving base 131 is slidably disposed at the sliding groove 300 of the sensing frame 30 to slide along the sliding groove 300.

It should be noted that the pressure sensor 20 of the present application may include a sensing element 21 and a converting element 22, wherein the sensing element 21 is convexly disposed on the converting element 22, and the sensing element 21 contacts the measuring end 1312 of the bearing base 131 for sensing the strain of the bearing base 131, wherein the converting element 22 is configured to convert the strain sensed by the sensing element 21 into an electrical signal to output a corresponding pressure value.

Preferably, the pressure sensor 20 may further comprise a processing module, wherein the processing module is configured to calculate the tension value applied to the strapping element 70 according to the electrical signal converted by the conversion element 22.

More preferably, the bearing base 131 may further have a receiving groove 1315 disposed at the measuring end 1312 for receiving a head portion of the sensing element 21 of the pressure sensor 20 in contact therewith and exposing a root portion of the sensing element 21 outside the receiving groove 1315, so as to secure that the bearing base 131 can protect the sensing element 21 and also reserve a certain sliding space for the bearing base 131 to be strained, so that the sensing element 21 can sense the strain of the bearing base 131.

According to another aspect of the present application, as shown in fig. 10 and 11, there is further provided a tension sensing method for sensing tension applied to a binding member. Specifically, as shown in fig. 10, the tension detecting method may include the steps of:

s100: converting the tensile force applied to a bundling element into pressure; and

s200: the converted pressure is measured to determine the tension applied to the strapping element.

It should be noted that, in the above-mentioned embodiment of the present application, as shown in fig. 11, the step S100 of the tension detecting method may include the steps of:

s110: restricting the passage of the bundling element from a first position;

s120: restricting the passage of the bundling element from a second position; and

s130: guiding the strapping element to pass through a bearing position, wherein the first limiting position, the second limiting position and the bearing position are arranged in a triangular shape, and bending the strapping element passing through the first limiting position, the bearing position and the second limiting position in sequence at the bearing position to convert the tensile force into the pressure force.

It will be understood by those skilled in the art that the embodiments of the present invention as described above and shown in the drawings are given by way of example only and are not limiting of the present invention. The objects of the present invention have been fully and effectively accomplished.

The functional and structural principles of the present invention have been shown and described in the embodiments without departing from the principles, embodiments of the present invention may have any deformation or modification.

Claims (18)

1. A tension detecting device for detecting a tension applied to the bundling member, wherein the tension detecting device comprises:

the tension-compression conversion assembly is used for converting tension applied to the bundling element into pressure; and

and the pressure sensor is correspondingly arranged and used for measuring the pressure converted by the tension-compression conversion assembly so as to obtain the tension applied to the bundling element.

2. A tension sensing device according to claim 1, wherein the tension-compression converting assembly includes a first limiting mechanism for limiting the passage of the banding element from a first limiting position, a second limiting mechanism for limiting the passage of the banding element from a second limiting position, and a bearing mechanism for guiding the passage of the banding element from a bearing position, wherein the bearing mechanism is correspondingly disposed between the first limiting mechanism and the second limiting mechanism, and the first limiting position, the second limiting position and the bearing position are arranged in a triangular shape for bending the banding element at the bearing position to apply pressure to the bearing mechanism, so that the tension applied to the banding element is converted into the pressure applied to the bearing mechanism, wherein the pressure sensor is correspondingly disposed to the bearing mechanism, the pressure measuring device is used for measuring the pressure applied to the pressure bearing mechanism.

3. The tension sensing device according to claim 2, further comprising a sensing frame, wherein the tension-compression converting assembly and the pressure sensor are correspondingly disposed on the sensing frame to form a stand-alone device having a tension sensing function.

4. The tension detecting apparatus according to claim 3, wherein the first position limiting mechanism includes a first position limiting wheel, and the first position limiting wheel is correspondingly mounted to the detecting frame to define the first position limiting position by an outer circumference of the first position limiting wheel; the second limiting mechanism comprises a second limiting wheel, and the second limiting wheel is correspondingly installed on the detection frame so as to limit the second limiting position through the outer periphery of the second limiting wheel.

5. The tension detecting apparatus according to claim 4, wherein the first position limiting mechanism further comprises a first guide wheel, and the first guide wheel and the first position limiting wheel are spaced apart to form a first guide channel between the first guide wheel and the first position limiting wheel, for guiding the binding member passing through the first guide channel to contact an outer periphery of the first position limiting wheel to define the first position limiting position; wherein the second stop mechanism further comprises a second guide wheel and the second stop wheel are spaced apart to form a second guide channel between the second guide wheel and the second stop wheel for guiding the bundling element passing through the second guide channel into contact with the outer periphery of the second stop wheel to define the second stop position.

6. The tension sensing device according to claim 5, wherein the height of the first guide passage and the height of the second guide passage are equal to the thickness of the binding element.

7. The tension detecting apparatus according to claim 6, wherein the first position-limiting mechanism further comprises a first guide wheel, and the first guide wheel is correspondingly provided for guiding the direction of the binding member threaded from the first guide passage; wherein the second limiting mechanism further comprises a second guide wheel, and the second guide wheel is correspondingly arranged for guiding the trend of the bundling element which passes out of the second guide channel.

8. The tension detecting apparatus according to claim 7, wherein the first stopper wheel, the first guide wheel, and the first guide wheel are arranged in a triangular shape, and the first guide wheel is located between the first stopper wheel and the first guide wheel; wherein the second limiting wheel, the second guiding wheel and the second guiding wheel are arranged in a triangular shape, and the second guiding wheel is positioned between the second limiting wheel and the second guiding wheel.

9. The tension detecting apparatus according to claim 8, wherein the first limiting wheel is a first fixed pulley mounted to the detecting frame, and wherein the second limiting wheel is a second fixed pulley mounted to the detecting frame.

10. The tension detecting apparatus according to claim 9, wherein the first position limiting mechanism further comprises a guide frame, wherein the guide frame is rotatably mounted to the detecting frame about a rotation axis of the first fixed sheave, and the first guide wheel are rotatably mounted to the guide frame, wherein the second guide wheel and the second guide wheel are rotatably mounted to the detecting frame.

11. The tension detecting apparatus according to any one of claims 3 to 10, wherein the bearing mechanism of the tension-compression converting assembly includes a bearing base and a bearing wheel, wherein the bearing base is slidably disposed on the detecting frame, and the bearing wheel is correspondingly disposed on the bearing base, wherein the pressure sensor is correspondingly disposed on the bearing base, and the bearing base is located between the pressure sensor and the bearing wheel to define the bearing position by an outer periphery of the bearing wheel.

12. The tension detecting apparatus according to claim 11, wherein the pressure-bearing base has a pressure-bearing end and a measuring end, wherein the pressure sensors are correspondingly disposed at the measuring end of the pressure-bearing base, and the pressure-bearing wheel is rotatably disposed at the pressure-bearing end of the pressure-bearing base.

13. The tension detecting apparatus according to claim 12, wherein the pressure-bearing base further has a rolling groove provided at the pressure-bearing end, wherein the pressure-bearing wheel is a roller, and the roller is partially exposed to be placed in the rolling groove of the pressure-bearing base to roll in the rolling groove.

14. The tension detecting apparatus according to claim 13, wherein the bearing mechanism further comprises a plurality of balls, wherein the plurality of balls are rollably disposed in the rolling groove between an inner wall of the rolling groove and the roller.

15. The tension detecting apparatus according to claim 14, wherein the pressure-bearing base further comprises a stopper cover having an opening, wherein the stopper cover is covered on the rolling groove to partially cover the rolling groove to restrict the position of the plurality of balls, and a portion of the roller is exposed from the opening of the stopper cover.

16. The tension sensing device according to claim 15, wherein the sensing frame has a sliding groove extending in a direction in which the binding member applies the pressing force to the pressing wheel, and the pressing base is slidably provided to the sliding groove to slide along the sliding groove.

17. The tension detecting apparatus according to claim 16, wherein the pressure sensor comprises a sensing element and a converting element, wherein the sensing element is convexly disposed on the converting element, and the sensing element contacts the measuring end of the bearing base for sensing the strain of the bearing base, wherein the converting element is configured to convert the strain sensed by the sensing element into a corresponding electrical signal to output a corresponding pressure value; the bearing base is further provided with a containing groove arranged at the measuring end, and the containing groove is used for containing the head part of the sensitive element of the pressure sensor in a contact mode, so that the tail part of the sensitive element is exposed out of the containing groove.

18. The tension sensing device according to claim 2, wherein a distance between the first limit position and the bearing position is equal to a distance between the second limit position and the bearing position.

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