Torque calibration table and torque calibration system

Abstract

The utility model relates to the technical field of engineering testing, and provides a torque calibration table and a torque calibration system. The torque calibration table comprises a strain gauge, a first supporting piece, a second supporting piece, a calibration table main body, a driving mechanism, a cantilever and a tension mechanism, the strain gauge is arranged on a to-be-calibrated shaft, the to-be-calibrated shaft is rotationally connected with the first supporting piece and the second supporting piece, and the first supporting piece and the second supporting piece are connected to the calibration table body; one end of the shaft to be calibrated is connected with the driving mechanism, the other end of the shaft to be calibrated is connected with the cantilever, the cantilever is provided with a horizontal detection piece, and one end of the cantilever is connected with the tension mechanism. Through the calibration table, the calibration time can be shortened, time and labor are saved, and the calibration accuracy can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to engineering test technical field especially relates to a torque calibration platform and torque calibration system. BACKGROUND

[0002] The existing torque calibration platform generally fixes one end of the transmission shaft, and applies force to the shaft through the weight. During the calibration process, the operator needs to gradually increase the weight to adjust the torque, and usually calibrates with a gradient of 50Nm, and finally fits a curve.

[0003] However, the existing torque calibration platform needs the operator to continuously adjust the weight, and the calibration efficiency is low, and it usually takes one day to calibrate a transmission shaft. Moreover, the adjustment gradient of the torque is large by adjusting the weight, and it is difficult to ensure the accuracy of the calibration. Therefore, the existing torque calibration platform needs to manually apply the weight to control the torque, which is time-consuming and laborious and is prone to large errors. SUMMARY

[0004] The utility model solves the technical problem that a torque calibration platform and a torque calibration system are provided to solve the above technical problems.

[0005] The technical scheme for solving the above technical problem is as follows: a torque calibration platform, comprising: a strain gauge, a first support, a second support, a calibration platform main body, a driving mechanism, a cantilever, and a tension mechanism; the strain gauge is arranged on a shaft to be calibrated, the shaft to be calibrated is rotatably connected with the first support and the second support respectively, and the first support and the second support are connected to the calibration platform main body; one end of the shaft to be calibrated is connected with the driving mechanism, the other end of the shaft to be calibrated is connected with the cantilever, a horizontal detection piece is arranged on the cantilever, and one end of the cantilever is connected with the tension mechanism.

[0006] The utility model has the advantages that the utility model directly controls the output of the tension mechanism to accurately control the torque of the shaft to be calibrated, and then obtains the relationship between the torque of the shaft to be calibrated and the stress of the strain gauge. Through the tension mechanism, the output can be controlled with a smaller gradient, so that the calibration curve is more objective and real. The driving mechanism is arranged to provide a force opposite to the tension mechanism, fix one end of the shaft to be calibrated, and obtain the relationship between the output of the driving mechanism and the stress of the strain gauge, which is used to verify whether the obtained calibration curve is accurate. In summary, the calibration platform can shorten the calibration time, save time and effort, and improve the accuracy of calibration.

[0007] On the basis of the above technical scheme, the utility model can also be improved as follows.

[0008] Further, the driving mechanism comprises a torque motor, a driving wheel, a driven wheel and a belt, the torque motor is connected to the calibration bench body, the output end of the torque motor is connected to the driving wheel, the end of the shaft to be calibrated is connected to the driven wheel, and the belt is tensioned between the driving wheel and the driven wheel.

[0009] The beneficial effect of the further scheme is that when the torque motor operates, the driving wheel is driven to rotate, the driving wheel drives the driven wheel to rotate through the belt, and the driven wheel applies force to the shaft to be calibrated.

[0010] Further, the tension mechanism comprises a tension motor, a winding drum and a tension rope, the output end of the tension motor is connected to the winding drum, one end of the winding drum is connected to the tension rope, and the other end of the tension rope is connected to the end of the cantilever.

[0011] The beneficial effect of the further scheme is that when the tension motor operates, the winding drum is driven to rotate, so that the winding drum realizes the winding of the tension rope, the tension rope drives one end of the cantilever to move downward, and then applies force to the shaft to be calibrated.

[0012] Further, the cantilever comprises a first suspension rod and a second suspension rod, the end of the shaft to be calibrated is connected to the center position of the first suspension rod, and the two ends of the first suspension rod are respectively hinged with the second suspension rod.

[0013] Further, the second support comprises a base, a first connecting plate and a second connecting plate, one end of the base is connected to the calibration bench body, the other end of the base is connected with the oppositely arranged first connecting plate and second connecting plate, and the first suspension rod is arranged between the first connecting plate and the second connecting plate.

[0014] Further, a sliding groove is formed in the calibration bench body, and a sliding block is connected to the first support and slidably connected in the sliding groove.

[0015] The beneficial effect of the further scheme is that the position of the first support on the calibration bench body can be adjusted according to the length of the shaft to be calibrated, so as to meet the torque calibration of transmission shafts of different lengths.

[0016] Further, the calibration bench body comprises a table top and a support frame, and the table top is connected to the support frame.

[0017] Further, the horizontal detection member is a level.

[0018] The beneficial effect of the further scheme is that whether the cantilever is in a horizontal state can be determined conveniently and quickly.

[0019] Furthermore, it also includes a first connector and a second connector. The shaft to be calibrated is rotatably connected to the first support through the first connector, and the shaft to be calibrated is rotatably connected to the second support through the second connector. One end of the shaft to be calibrated is connected to the drive mechanism through the first connector, and the other end of the shaft to be calibrated is connected to the cantilever through the second connector.

[0020] The beneficial effect of adopting the above-mentioned further solution is that the first connector and the second connector enable quick assembly and disassembly of the shaft to be calibrated.

[0021] To solve the above-mentioned technical problems, this utility model also provides a torque calibration system, including a torque calibration table as described above. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a torque calibration platform according to the present invention.

[0023] The attached diagram lists the components represented by each number as follows:

[0024] 1. Strain gauge; 2. First support component; 3. Shaft to be calibrated; 4. Torque motor; 5. Driving wheel; 6. Driven wheel; 7. Belt; 8. Tension motor; 9. Drum; 10. Pull rope; 11. First suspension rod; 12. Second suspension rod; 13. Base; 14. First connecting plate; 15. Second connecting plate; 16. Slide groove; 17. Platform; 18. Support frame. Detailed Implementation

[0025] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0026] Example 1

[0027] like Figure 1 As shown, this embodiment provides a torque calibration platform, including: a strain gauge 1, a first support member 2, a second support member, a calibration platform body, a drive mechanism, a cantilever, and a tension mechanism; the strain gauge 1 is disposed on the shaft to be calibrated 3, the shaft to be calibrated 3 is rotatably connected to the first support member 2 and the second support member respectively, the first support member 2 and the second support member are respectively connected to the calibration platform body; one end of the shaft to be calibrated 3 is connected to the drive mechanism, the other end of the shaft to be calibrated 3 is connected to the cantilever, a horizontal detection member is disposed on the cantilever, and one end of the cantilever is connected to the tension mechanism.

[0028] The embodiment directly controls the torque of the to-be-calibrated shaft 3 by controlling the output of the tension mechanism, and then obtains the relationship between the torque of the to-be-calibrated shaft 3 and the stress of the strain gauge 1. The tension mechanism can control the output with a smaller gradient, so that the calibration curve is more objective and true. The driving mechanism is arranged to provide a force opposite to the tension mechanism, fix one end of the to-be-calibrated shaft 3, and obtain the relationship between the output of the driving mechanism and the stress of the strain gauge 1, so as to verify whether the obtained calibration curve is accurate. In summary, the calibration table can shorten the calibration time, save time and effort, and improve the accuracy of calibration.

[0029] Optionally, in the embodiment, the driving mechanism comprises a torque motor 4, a driving wheel 5, a driven wheel 6 and a belt 7, the torque motor 4 is connected to the calibration table body, the output end of the torque motor 4 is connected to the driving wheel 5, one end of the to-be-calibrated shaft 3 is connected to the driven wheel 6, and the belt 7 is tensioned between the driving wheel 5 and the driven wheel 6.

[0030] When the torque motor 4 operates, the driving wheel 5 is driven to rotate, the driving wheel 5 drives the driven wheel 6 to rotate through the belt 7, and then the driven wheel 6 applies a force to the to-be-calibrated shaft 3.

[0031] Optionally, in the embodiment, the tension mechanism comprises a tension motor 8, a winding drum 9 and a tension rope 10, the output end of the tension motor 8 is connected to the winding drum 9, the winding drum 9 is connected to one end of the tension rope 10, and the other end of the tension rope 10 is connected to the end of the cantilever.

[0032] The tension motor 8 is fixedly connected to the ground, when the tension motor 8 operates, the winding drum 9 is driven to rotate, so that the winding drum 9 realizes the winding of the tension rope 10, the tension rope 10 drives one end of the cantilever to move downward, and then applies a force to the to-be-calibrated shaft 3.

[0033] Optionally, in the embodiment, the cantilever comprises a first suspension rod 11 and a second suspension rod 12, one end of the to-be-calibrated shaft 3 is connected to the center position of the first suspension rod 11, and the two ends of the first suspension rod 11 are respectively hinged with the second suspension rod 12.

[0034] The structures, sizes and mounting positions of the two second suspension rods 12 are completely same, so that the first suspension rod 11 can keep horizontal in the state that the tension mechanism does not apply a force.

[0035] Optionally, in the embodiment, the second support comprises a base 13, a first connecting plate 14 and a second connecting plate 15, one end of the base 13 is connected to the calibration table body, the other end of the base 13 is connected with the oppositely arranged first connecting plate 14 and second connecting plate 15, and the first suspension rod 11 is arranged between the first connecting plate 14 and the second connecting plate 15.

[0036] In the embodiment, the structure of the first support 2 is the same as that of the second support.

[0037] Optionally, in the embodiment, a sliding groove 16 is formed on the calibration bench body, and a sliding block is connected to the first support 2 and slidingly connected in the sliding groove 16.

[0038] In the embodiment, the sliding block is a bolt, two sliding grooves 16 are provided, and the two sliding grooves 16 are parallel. Specifically, the bolt is threaded in the sliding groove 16, the end of the bolt is threadedly connected with the first support 2, and the number of the bolts can be adjusted according to actual use.

[0039] In addition, a slide rail can also be installed between the first support 2 and the calibration bench body to realize the sliding movement of the first support 2 on the calibration bench body.

[0040] In addition, to ensure the cooperation of the driving wheel 5 and the driven wheel 6, the torque motor 4 and the driving wheel 5 also need to be moved to the corresponding positions when the first support 2 moves. The torque motor 4 can be artificially disassembled, and after the position of the first support 2 is determined, the torque motor 4 is installed to the corresponding position of the calibration bench body. The torque motor 4 can also be slid on the calibration bench body by the above-mentioned sliding groove 16 and bolt cooperation mode or by installing a slide rail at the bottom of the torque motor 4 to adjust the position.

[0041] Through the above structure, the position of the first support 2 on the calibration bench body can be adjusted according to the length of the to-be-calibrated shaft 3 to meet the torque calibration of transmission shafts of different lengths.

[0042] Optionally, in the embodiment, the calibration bench body comprises a bench top 17 and a support frame 18, and the bench top 17 is connected to the support frame 18.

[0043] In the embodiment, the support frame 18 comprises four support legs, and the four support legs are respectively connected to the bottom four corners of the bench top 17.

[0044] Optionally, in the embodiment, the horizontal detection member is a level meter. The horizontal detection member can also be a level gauge, an inclination sensor, etc.

[0045] Optionally, in the embodiment, a first connecting member and a second connecting member are further provided, the to-be-calibrated shaft 3 is rotatably connected to the first support 2 through the first connecting member, the to-be-calibrated shaft 3 is rotatably connected to the second support through the second connecting member, one end of the to-be-calibrated shaft 3 is connected to the driving mechanism through the first connecting member, and the other end of the to-be-calibrated shaft 3 is connected to the cantilever through the second connecting member.

[0046] Specifically, the first connecting member comprises a first connecting shaft and a first fixing clamp, and the second connecting member comprises a second connecting shaft and a second fixing clamp. The first connecting shaft is rotationally connected to the first support member 2, one end of the first connecting shaft is fixedly connected to the driven wheel 6, and the other end of the first connecting shaft is fixedly connected to the first fixing clamp. The second connecting shaft is rotationally connected to the first connecting plate 14 of the first support member 2, one end of the second connecting shaft is fixedly connected to the first suspension rod 11, and the other end of the second connecting shaft is fixedly connected to the second fixing clamp. The first fixing clamp and the second fixing clamp are used to clamp and fix the shaft to be calibrated 3.

[0047] Use process: clamp and fix the transmission shaft to be calibrated by the first fixing clamp and the second fixing clamp, and fix the strain gauge 1 to the transmission shaft. Start the tension motor 8 and the torque motor 4, and the two motors apply forces in opposite directions to the transmission shaft, so as to ensure that the cantilever is still in a horizontal state. Record the corresponding relationship between the tension of the tension motor 8 and the stress of the strain gauge 1, and the corresponding relationship between the output torque of the torque motor 4 and the stress of the strain gauge 1. According to a certain gradient, increase the output torque of the torque motor 4 and the tension of the tension motor 8, and repeat the above-mentioned mode to record data until the torque gradually increases to a set maximum value. Finally, the tension of the tension motor 8 and the stress change curve of the strain gauge 1 are obtained, and the stress change curve of the strain gauge 1 and the output torque of the torque motor 4 are obtained, and the calibration of the transmission shaft is completed. And, the two curve relationships can be judged to realize bidirectional verification, and the reliability of the calibration is ensured.

[0048] Through the calibration bench, the transmission shaft torque can be accurately controlled by controlling the motor output, the motor output can be adjusted by 1 Nm as a gradient, or even the output can be controlled by a smaller gradient, so that the calibration curve is more objective and true. And, through the calibration bench, the torque calibration of the transmission shaft can be quickly completed, which is shortened from one day to one to two hours by the existing method. In summary, through the calibration bench, the calibration time can be shortened, time and effort can be saved, and the accuracy of the calibration can be improved.

[0049] Embodiment two

[0050] The embodiment provides a torque calibration system, which comprises the torque calibration bench according to embodiment one.

[0051] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0052] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0053] In the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, it can be the communication or interaction relationship between two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0054] In the utility model, unless otherwise specifically defined and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0055] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. Furthermore, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples, without contradiction.

[0056] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and the person skilled in the art can make changes, modifications, replacements and modifications to the above embodiments within the scope of the present application.

Claims

1. A torque calibration stage, characterized in that, include: Strain gauge (1), first support member (2), second support member, calibration table body, drive mechanism, cantilever and tension mechanism; The strain gauge (1) is set on the shaft to be calibrated (3), the shaft to be calibrated (3) is rotatably connected to the first support (2) and the second support respectively, the first support (2) and the second support are respectively connected to the calibration table body; one end of the shaft to be calibrated (3) is connected to the drive mechanism, the other end of the shaft to be calibrated (3) is connected to the cantilever, a horizontal detection element is provided on the cantilever, and one end of the cantilever is connected to the tension mechanism.

2. The torque calibration stage according to claim 1, characterized in that, The drive mechanism includes a torque motor (4), a drive wheel (5), a driven wheel (6), and a belt (7). The torque motor (4) is connected to the calibration platform body. The output end of the torque motor (4) is connected to the drive wheel (5). The end of the shaft to be calibrated (3) is connected to the driven wheel (6). The belt (7) is tensioned between the drive wheel (5) and the driven wheel (6).

3. The torque calibration stage according to claim 1, characterized in that, The tensioning mechanism includes a tension motor (8), a drum (9), and a pull rope (10). The output end of the tension motor (8) is connected to the drum (9), the drum (9) is connected to one end of the pull rope (10), and the other end of the pull rope (10) is connected to the end of the cantilever.

4. The torque calibration stage according to claim 1, characterized in that, The cantilever includes a first suspension rod (11) and a second suspension rod (12). The end of the shaft to be calibrated (3) is connected to the center of the first suspension rod (11), and the two ends of the first suspension rod (11) are respectively hinged to the second suspension rod (12).

5. The torque calibration table according to claim 4, characterized in that, The second support includes a base (13), a first connecting plate (14), and a second connecting plate (15). One end of the base (13) is connected to the calibration platform body, and the other end of the base (13) is connected to the first connecting plate (14) and the second connecting plate (15) which are arranged opposite to each other. The first suspension rod (11) is arranged between the first connecting plate (14) and the second connecting plate (15).

6. The torque calibration table according to claim 1, characterized in that, The calibration platform body is provided with a sliding groove (16), and a slider is connected to the first support member (2), and the slider is slidably connected in the sliding groove (16).

7. The torque calibration table according to claim 1, characterized in that, The calibration platform body includes a platform (17) and a support frame (18), and the platform (17) is connected to the support frame (18).

8. The torque calibration table according to claim 1, characterized in that, The level detection component is a level.

9. The torque calibration table according to claim 1, characterized in that, It also includes a first connector and a second connector. The shaft to be calibrated (3) is rotatably connected to the first support (2) through the first connector. The shaft to be calibrated (3) is rotatably connected to the second support through the second connector. One end of the shaft to be calibrated (3) is connected to the drive mechanism through the first connector, and the other end of the shaft to be calibrated (3) is connected to the cantilever through the second connector.

10. A torque calibration system, characterized in that, Including a torque calibration table as described in any one of claims 1 to 9.

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