A device for measuring the stiffness of a reducer

Abstract

The utility model relates to a kind of reducer measuring devices, specifically a kind of rigid measuring device of reducer, to solve the rigid measurement method of existing reducer, it is difficult to guarantee the force stability of reducer using the mode of rotating lever, it is easy to produce larger error, and when measuring the reducer of larger rated torque, the deformation of lever is larger, it can affect the accuracy of measurement data technical problem.The utility model includes base, input end fixed mechanism, hit precision board, pressure sensor, linear drive mechanism, dial gauge and hit meter block, reducer mounting hole is provided on base, input end fixed mechanism is used to fix the input end of the reducer to be measured, a pair of vertical seat is fixed on base, pressure sensor is movably arranged between a pair of vertical seat by linear drive mechanism, one end of hit precision board is used to be fixed with the output end of the reducer to be measured, the other end is used to extend to the movement path of pressure sensor, hit meter block is fixed on hit precision board, dial gauge is arranged on base.

Description

Technical Field

[0001] This utility model relates to a speed reducer measuring device, specifically a speed reducer rigidity measuring device. Background Technology

[0002] With the rapid development of modern industry, machining robots and heavy machinery, with their advantage of saving significant human resources, are gradually gaining attention in more fields. As a key component in machining robots and heavy machinery, the reducer's load-bearing capacity, rigidity, and input / output mechanical performance requirements have become important indicators for reducer innovation. Among these, rigidity is a crucial indicator in all reducers, determining the torque the reducer can withstand and its stability and accuracy under high loads. Therefore, accurate measurement and verification of reducer rigidity are essential.

[0003] In existing technologies, the commonly used method for measuring the rigidity of reducers typically involves fixing both the reducer's housing and input end, and then fixing a lever to the output end of the reducer. The rigidity of the reducer is then measured by rotating the lever. However, rotating the lever makes it difficult to ensure stable force on the reducer, which can easily introduce large errors. Moreover, when measuring reducers with large rated torque, the lever length is relatively long, resulting in significant lever deformation during measurement, which affects the accuracy of the measurement data and consequently the calculation and measurement results of the rigidity data. Utility Model Content

[0004] The purpose of this invention is to solve the technical problems of existing methods for measuring the rigidity of reducers, which use a rotating lever and cannot guarantee the stability of the force on the reducer, easily resulting in large errors. Moreover, when measuring reducers with large rated torque, the lever deformation is large, which affects the accuracy of the measurement data. Therefore, this invention provides a device for measuring the rigidity of reducers.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A speed reducer stiffness measuring device, characterized by:

[0007] Includes a bracket, base, input end fixing mechanism, precision plate, pressure sensor, linear drive mechanism, dial indicator or micrometer indicator, dial indicator block and a pair of uprights;

[0008] The base is fixedly mounted on the top of the bracket. The base is provided with a reducer clearance hole. At least one set of reducer mounting holes are provided on the base on the outer periphery of the reducer clearance hole for fixing the housing of the reducer to be measured by fasteners.

[0009] The input end fixing mechanism is used to fix the input end of the reducer to be measured;

[0010] Both stands are fixedly mounted on the upper surface of the base;

[0011] The pressure sensor is movably mounted between a pair of bases via a linear drive mechanism, and the direction of movement of the pressure sensor is parallel to the upper surface of the base.

[0012] One end of the precision plate is used to be fixedly connected to the output end of the reducer to be measured, and the other end is used to extend to the moving path of the pressure sensor. The rotation axis of the precision plate is perpendicular to the upper surface of the base. A pressure-bearing surface for contacting the pressure sensor is provided on the other end of the precision plate near the pressure sensor.

[0013] The dial indicator block is fixedly mounted on the accuracy plate, and the dial indicator or micrometer is mounted on the base to cooperate with the dial indicator block to measure the backlash of the reducer to be measured.

[0014] Furthermore, two pressure sensors are provided, and the two pressure sensors are located on both sides of the other end of the precision plate, with a pressure-bearing surface provided on each side of the other end of the precision plate.

[0015] Furthermore, it also includes a crossbeam, the two ends of which are fixedly connected to a pair of uprights;

[0016] It also includes a pair of pads of the same height, which are detachably mounted between a pair of uprights and a base;

[0017] It also includes washers, which are used to be placed between the housing and the base of the reducer to be measured;

[0018] The linear drive mechanism includes a screw, which is threadedly connected to a pair of bases, and the axis of the screw is parallel to the upper surface of the base.

[0019] The pressure sensor is a ring-shaped pressure sensor connected to a data display instrument. The pressure sensor is fixedly mounted on the screw.

[0020] A handwheel is provided on at least one end of the screw.

[0021] Furthermore, the dial indicator block is provided with a measuring surface, which is perpendicular to the upper surface of the base; the base of the dial indicator or micrometer is used to fix it on the base, and the probe of the dial indicator or micrometer is used to make perpendicular contact with the measuring surface.

[0022] The upper surface of the dial indicator block is provided with dial indicator scale lines perpendicular to the measuring surface. The dial indicator scale lines are perpendicular to the moving direction of the pressure sensor, and the distance between the dial indicator scale lines and the rotation axis of the dial indicator plate is greater than zero. The probe of the dial indicator or micrometer is aligned with the dial indicator scale lines in the initial measurement state.

[0023] Furthermore, the input terminal fixing mechanism includes a reverse input terminal fixing component and / or a same-direction input terminal fixing component;

[0024] The reverse input terminal fixing assembly includes a fixing member, a clamp, and multiple fixing screws. The fixing member includes a plate-shaped part and an insert rod part integrally formed on the top of the plate-shaped part. The multiple fixing screws are used to pass through multiple through holes provided on the plate-shaped part and be fixedly connected to the housing of the reducer to be measured. The insert rod part is used to be inserted into the inner hole of the input terminal of the reducer to be measured. The clamp is used to be fitted on the outer periphery of the input terminal of the reducer to be measured to lock the input terminal of the reducer to be measured and the insert rod part.

[0025] The same-direction input terminal fixing assembly includes a support plate, a fixing plate, and input terminal fastening screws;

[0026] The lower end of the support plate is fixedly connected to the base; one end of the fixed plate is fixedly connected to the upper end of the support plate, and the other end is provided with an input end clamping hole that penetrates the upper and lower surfaces. The axis of the input end clamping hole is perpendicular to the upper surface of the base. The inner diameter of the input end clamping hole is adapted to the outer diameter of the input end of the reducer to be measured. The end face of the fixed plate away from the support plate is provided with an input end opening that communicates with the input end clamping hole. The input end opening penetrates the upper and lower surfaces of the fixed plate. The two side walls opposite to the input end opening are respectively provided with an input end stepped hole and an input end threaded hole. The input end stepped hole and the input end threaded hole are coaxially arranged. The input end fastening screw passes through the input end stepped hole and the input end opening and is connected to the input end threaded hole.

[0027] Furthermore, the lower end of the support plate is inserted into the lower limit hole provided on the base, and the lower middle part of the support plate is fixedly connected to the base by fasteners. The upper end of the support plate is inserted into the upper limit hole provided on the fixed plate, and the fixed plate is fixedly connected to the upper middle part of the support plate by fasteners. The symmetrical plane of the lower limit hole, the symmetrical plane of the lower end of the support plate, the symmetrical plane of the upper end of the support plate, and the symmetrical plane of the upper limit hole coincide, and the axis of the input end clamping hole is located in the symmetrical plane of the upper limit hole.

[0028] The side of the fixed plate away from the support plate is provided with an input end arc groove that is recessed towards the input end clamping hole. The input end arc groove penetrates the upper and lower surfaces of the fixed plate.

[0029] Furthermore, the precision plate is provided with at least one set of mounting through holes, each set containing multiple mounting through holes. These multiple sets of mounting through holes are used to fix and connect to the output end of the reducer to be measured in various sizes and specifications by screws.

[0030] Furthermore, the dial indicator block is fixedly mounted on the upper surface of the dial indicator plate;

[0031] There are twelve mounting through holes, which are divided into four groups of one, three, six and two. The four groups of mounting through holes are arranged in the order of one, three, six and two, and are spaced around the rotation axis of the precision plate.

[0032] Furthermore, the precision plate is provided with an output end clamping hole that penetrates its upper and lower surfaces. The axis of the output end clamping hole is perpendicular to the upper surface of the base. The inner diameter of the output end clamping hole is adapted to the outer diameter of the output end of the reducer to be measured. An output end opening that communicates with the output end clamping hole is provided on the end face of the precision plate away from the pressure sensor. The output end opening penetrates the upper and lower surfaces of the precision plate. An output end stepped hole and an output end threaded hole are respectively provided on the two side walls opposite to the output end opening. The output end stepped hole and the output end threaded hole are coaxially arranged. An output end fastening screw is provided in the output end stepped hole. The output end fastening screw passes through the output end opening and connects to the output end threaded hole.

[0033] An output end arc groove is provided on the side of the precision plate away from the pressure sensor, which is recessed towards the output end clamping hole. The output end arc groove penetrates the upper and lower surfaces of the precision plate.

[0034] The dial indicator block is fixedly mounted on the side of the dial indicator plate away from the arc groove at the output end.

[0035] Furthermore, the base on the outer periphery of the reducer clearance hole is provided with 3-5 sets of reducer mounting holes, which are used to fix the housings of 3-5 different sizes and specifications of the reducers to be measured.

[0036] The advantages of this utility model compared to the prior art are:

[0037] 1. The reducer rigidity measuring device of this utility model pushes the pressure sensor to apply force to the pressure surface of the precision plate through the linear drive mechanism. The pressure sensor can directly measure the force on the output end of the reducer to be measured. The force application is stable, which helps to reduce the measurement error caused by the instability of the reducer force. In addition, the torque is transmitted through the precision plate, and the precision plate is not easily deformed, which helps to ensure the accuracy of the measurement data.

[0038] 2. The reducer rigidity measuring device of this utility model uses a linear drive mechanism to push a pressure sensor to apply force to the pressure surface of the precision plate. The pressure sensor can directly measure the force on the output end of the reducer to be measured. By using a dial indicator block in conjunction with a dial gauge or micrometer, the back clearance of the reducer to be measured can be measured. Then, the torsional rigidity of the reducer to be measured can be calculated. The measurement process is simple and easy to operate.

[0039] 3. The reducer rigidity measuring device of this utility model can measure the torque in both directions by setting two pressure sensors;

[0040] 4. The reducer rigidity measuring device of this utility model, by setting a screw and a handwheel, allows the measuring personnel to rotate the handwheel during measurement, which in turn pushes the pressure sensor to apply force to the precision plate through the screw. The handwheel rotation is labor-saving and easy.

[0041] 5. The reducer rigidity measuring device of this utility model has reliable stability and high load-bearing capacity by setting a pair of uprights and a fixing component for the same direction input end to be fixed on the base, and the reducer to be measured is also fixed on the base during measurement. Attached Figure Description

[0042] Figure 1 This is a front view structural schematic diagram of an embodiment of the speed reducer rigidity measuring device of this utility model;

[0043] Figure 2 for Figure 1 Top view;

[0044] Figure 3 for Figure 2 Enlarged view of point A in the image;

[0045] Figure 4 for Figure 1 The right view;

[0046] Figure 5 This is a front view schematic diagram of a second embodiment of the speed reducer rigidity measuring device of this utility model;

[0047] Figure 6 for Figure 5 Top view;

[0048] Figure 7 This is a front view structural schematic diagram of a third embodiment of the reducer rigidity measuring device of this utility model;

[0049] Figure 8 for Figure 7 Top view;

[0050] Figure 9 This is a top view of a fourth embodiment of the speed reducer rigidity measuring device of this utility model.

[0051] The annotations in the attached figures are explained as follows:

[0052] 1-Bracket, 2-Base, 21-Reducer mounting hole, 22-Lower limit hole, 23-Reducer clearance hole, 24-Washer, 3-Input end fixing mechanism, 31-Support plate, 32-Fixing plate, 321-Upper limit hole, 322-Input end clamping hole, 323-Input end opening, 324-Input end stepped hole, 325-Input end threaded hole, 326-Input end arc groove, 33-Fixing component, 331-Plate-shaped part, 332-Pin rod part, 34-Clamping clamp 35-Fixing screw, 4-Precision plate, 41-Pressure surface, 42-Mounting through hole, 43-Output end clamping hole, 44-Output end opening, 45-Output end stepped hole, 46-Output end threaded hole, 47-Output end arc groove, 5-Standing base, 51-Crossbeam, 52-Padded block, 6-Pressure sensor, 7-Linear drive mechanism, 71-Screw, 72-Handwheel, 8-Digital dial indicator block, 81-Measuring surface, 82-Digital dial indicator scale line, 9-Reducer, 91-Input end. Detailed Implementation

[0053] To make the objectives, advantages and features of this utility model clearer, the following describes in further detail a speed reducer rigidity measuring device proposed by this utility model in conjunction with the accompanying drawings and specific embodiments.

[0054] There are various types of input and output modes for speed reducers, such as input and output in the same direction, input and output in opposite directions, disc output, shaft output, gear output, spline output, etc. The different input and output modes of speed reducers determine the different installation methods of speed reducers when measuring rigidity.

[0055] The following examples 1 and 2 use a disc-type output reducer 9 with the input and output in the same direction as an example; example 3 uses a disc-type output reducer 9 with the input and output in opposite directions as an example; and example 4 uses a shaft-type output reducer 9 with the input and output in opposite directions as an example. These examples illustrate the reducer rigidity measuring device of this utility model.

[0056] Example 1

[0057] Reference Figure 1 , Figure 2 and Figure 4 The reducer rigidity measuring device of this utility model includes a bracket 1, a base 2, an input end fixing mechanism 3, a precision plate 4, a pressure sensor 6, a linear drive mechanism 7, a dial indicator, a dial indicator block 8, and a pair of uprights 5.

[0058] like Figure 1As shown, the base 2 is fixedly mounted on the top of the bracket 1. The base 2 can be fixedly connected to the bracket 1 by screws or welding. The base 2 is provided with a reducer clearance hole 23. On the outer periphery of the reducer clearance hole 23, the base 2 is provided with a set of reducer mounting holes 21 for fixing the housing of the reducer 9 to be measured by fasteners. This set of reducer mounting holes 21 includes multiple reducer mounting holes 21, and each of the multiple reducer mounting holes 21 is provided with internal threads, so that during measurement, the housing of the reducer 9 to be measured can be fixed to the base 2 by multiple screws. In other embodiments, the base 2 can also be provided with multiple sets of reducer mounting holes 21, each set of reducer mounting holes 21 including multiple reducer mounting holes 21, for example, 3-5 sets can be provided. The 3-5 sets of reducer mounting holes 21 are used to fix the housings of 3-5 different sizes of the reducer 9 to be measured, thereby meeting the measurement of more sizes of reducers 9 to be measured.

[0059] like Figure 1 , Figure 2 and Figure 3As shown, the input end fixing mechanism 3 includes a co-directional input end fixing component for fixing the input end 91 of the reducer 9 to be measured. The co-directional input end fixing component includes a support plate 31, a fixing plate 32 and an input end fastening screw. The lower end of the support plate 31 is fixedly connected to the base 2. The lower end of the support plate 31 is inserted into the lower limit hole 22 provided on the base 2, and the lower middle part of the support plate 31 is fixedly connected to the base 2 by fasteners, which are multiple screws. One end of the fixing plate 32 is fixedly connected to the upper end of the support plate 31. The upper end of the support plate 31 is inserted into the upper limit hole 321 provided on the fixing plate 32, and the fixing plate 32 is fixedly connected to the upper middle part of the support plate 31 by fasteners, which are multiple screws. The other end of the fixing plate 32 is provided with an input end clamping hole 322 that penetrates its upper and lower surfaces. The axis of the input end clamping hole 322 is perpendicular to the upper surface of the base 2. The inner diameter of the input end clamping hole 322 is adapted to the outer diameter of the input end of the reducer 9 to be measured. The fixing plate 32 is away from the support plate 31. An input end opening 323 is provided on one end face, which communicates with the input end clamping hole 322. The input end opening 323 penetrates the upper and lower surfaces of the fixing plate 32. An input end stepped hole 324 and an input end threaded hole 325 are respectively provided on the two side walls opposite to the input end opening 323. The input end stepped hole 324 and the input end threaded hole 325 are coaxially arranged. The input end fastening screw passes through the input end stepped hole 324 and the input end opening 323 and connects to the input end threaded hole 325. During measurement, after the input end 91 of the reducer 9 to be measured is inserted into the input end clamping hole 322, the input end fastening screw is tightened. The friction force can be used to prevent the input end 91 of the reducer 9 to be measured from rotating in the input end clamping hole 322, thereby fixing the input end 91 of the reducer 9 to be measured. To ensure measurement accuracy, the symmetry planes of the lower limit hole 22, the lower end of the support plate 31, the upper end of the support plate 31, and the upper limit hole 321 coincide, and the axis of the input end clamping hole 322 is located within the symmetry plane of the upper limit hole 321.

[0060] like Figure 3 As shown, the side of the fixing plate 32 away from the support plate 31 is provided with an input end arc groove 326 that is recessed towards the input end clamping hole 322. The input end arc groove 326 penetrates the upper and lower surfaces of the fixing plate 32. This design facilitates the deformation of the fixing plate 32 on the side of the input end opening 323 near the input end arc groove 326 when the input end fastening screw is tightened, thereby making the connection between the fixing plate 32 and the input end 91 of the reducer 9 to be measured more secure and reliable.

[0061] like Figure 2 and Figure 4As shown, a pair of uprights 5 are fixedly mounted on the upper surface of the base 2, and the uprights 5 are fixedly connected to the base 2 by multiple screws. Since the force acting on the uprights 5 during measurement is relatively large, in order to increase the structural strength, the reducer rigidity measuring device of this utility model also includes a crossbeam 51, and the two ends of the crossbeam 51 are fixedly connected to the top of the pair of uprights 5 by screws.

[0062] like Figure 1 and Figure 4 As shown, the pressure sensor 6 is movably mounted between a pair of supports 5 via a linear drive mechanism 7, and the movement direction of the pressure sensor 6 is parallel to the upper surface of the base 2. The linear drive mechanism 7 includes a screw 71, which is threadedly connected to a pair of supports 5, and the axis of the screw 71 is parallel to the upper surface of the base 2. The pressure sensor 6 is a ring-shaped pressure sensor connected to a data display instrument, and is fixedly mounted on the screw 71. A handwheel 72 is provided on one end of the screw 71. During measurement, rotating the handwheel causes the screw 71 to rotate and move along the axial direction of the screw 71, thereby driving the pressure sensor 6 to apply force to the precision plate 4. The operation is simple and convenient, and the use of the handwheel 72 makes it labor-saving and easy, and can accommodate a large torque force.

[0063] like Figure 1 , Figure 2 and Figure 3As shown, one end of the precision plate 4 is used to fix it to the output end of the reducer 9 to be measured. The precision plate 4 is provided with a set of mounting through holes 42, which includes multiple mounting through holes 42 for fixing it to the output end of the reducer 9 to be measured by screws. During measurement, multiple screws pass through multiple mounting through holes 42 and are fixedly connected to the output end of the reducer 9 to be measured, so that the rotation axis of the precision plate 4 coincides with the rotation axis of the output end of the reducer 9 to be measured and is perpendicular to the upper surface of the base 2. The screw connection makes it convenient to use the internal thread hole on the output end of the reducer. The other end of the precision plate 4 is used to extend to the moving path of the pressure sensor 6. The side of the other end of the precision plate 4 near the pressure sensor 6 is provided with a pressure-receiving surface for abutting against the pressure sensor 6. 41. The pressure surface 41 is perpendicular to the upper surface of the base 2, and the pressure surface 41 in the initial state is perpendicular to the moving direction of the pressure sensor 6. During measurement, the pressure sensor 6 moves to press against the pressure surface 41 and applies force to the precision plate 4. By observing the reading on the data display instrument, the magnitude of the force on the output end of the reducer 9 to be measured at that moment can be obtained. In this embodiment, there are twelve mounting through holes 42, which are divided into four groups according to one, three, six and two. The four groups of mounting through holes 42 are arranged in the order of one, three, six and two, and are spaced around the rotation axis of the precision plate 4. This arrangement not only makes the connection between the precision plate 4 and the output end of the reducer 9 to be measured have high structural strength and can meet the large torque force, but also makes use of the internal thread hole on the output end of the reducer 9 to be measured. In other embodiments, multiple sets of mounting through holes 42 can be provided on the precision plate 4. Each set of mounting through holes 42 includes multiple mounting through holes 42. The multiple sets of mounting through holes 42 are used to fix and connect to the output end of the reducer 9 of various sizes and specifications by screws, so as to meet the measurement of reducers 9 of more sizes and specifications.

[0064] like Figure 2 and Figure 3 As shown, the dial indicator block 8 is fixed to the upper surface of the precision plate 4 by a pair of screws. The dial indicator block 8 has a measuring surface 81, which is perpendicular to the upper surface of the base 2. The upper surface of the dial indicator block 8 has a dial indicator scale line 82 perpendicular to the measuring surface 81. The dial indicator scale line 82 is perpendicular to the moving direction of the pressure sensor 6, and the distance between the dial indicator scale line 82 and the rotation axis of the precision plate 4 is greater than zero. A dial indicator is mounted on the base 2, with its base used for fixing it to the base 2. The dial indicator probe is used to perpendicularly contact the measuring surface 81 and align with the dial indicator scale line 82 in the initial measurement state. By cooperating with the dial indicator block 8, the backlash of the reducer 9 under test can be measured. In other embodiments, the dial indicator can be set as a percentage indicator according to the required measurement accuracy.

[0065] When performing rigidity measurement on the reducer 9, firstly, the reducer 9 to be measured is fixed to the base 2 with screws. Then, the two ends of the fixing plate 32 are respectively fitted onto the upper end of the support plate 31 and the input end 91 of the reducer 9 to be measured through the upper limit hole 321 and the input end clamping hole 322. Then, the fixing plate 32 is fixedly connected to the support plate 31 with screws, and the input end fastening screws are tightened to fix the fixing plate 32 to the input end 91 of the reducer 9 to be measured. Then, the precision plate 4 is fixedly connected to the output end of the reducer 9 to be measured with screws, and the dial indicator block 8 is fixed to the upper surface of the precision plate 4 with screws. Then, the dial indicator base is fixed to the base 2, and the dial indicator probe is perpendicular to the measuring surface 81. Align the dial indicator with the graduation line 82, then rotate the handwheel 72. The handwheel 72 drives the pressure sensor 6 to move via the screw 71. After the pressure sensor 6 contacts the calibration plate 4, continue rotating the handwheel 72. The handwheel 72 pushes the pressure sensor 6 to apply force to the calibration plate 4 via the screw 71. Then, observe and record the force on the output end of the reducer 9 under test using the data display instrument. At the same time, measure and record the offset distance of the measuring surface 81 on the dial indicator block 8 using a dial indicator. Finally, calculate the torque force on the output end of the reducer 9 under test based on the recorded force. Combined with the recorded offset distance of the measuring surface 81 on the dial indicator block 8, the torsional stiffness of the reducer 9 under test can be calculated.

[0066] Example 2

[0067] refer to Figure 5 and Figure 6 The difference between this embodiment and Embodiment 1 is that, in this embodiment, two pressure sensors 6 are provided, and the two pressure sensors 6 are respectively located on both sides of the other end of the precision plate 4. Each side of the other end of the precision plate 4 is provided with a pressure-bearing surface 41, and each end of the screw 71 is provided with a handwheel 72. By providing pressure sensors 6 on both sides of the precision plate 4, bidirectional torque measurement within the specified range can be achieved. The handwheel 72 on each end of the screw 71 facilitates operation by the measuring personnel.

[0068] Example 3

[0069] refer to Figure 7 and Figure 8The difference between this embodiment and embodiment 2 is that, in this embodiment, the input end fixing mechanism 3 includes not only the same-direction input end fixing component but also the reverse input end fixing component. The reverse input end fixing component includes a fixing member 33, a clamp 34, and multiple fixing screws 35. The fixing member 33 includes a plate-shaped part 331 and an insert rod part 332 integrally formed on the top of the plate-shaped part 331. The multiple fixing screws 35 are used to pass through multiple through holes provided on the plate-shaped part 331 and be fixedly connected to the housing of the reducer 9 to be measured. The insert rod part 332 is used to be inserted into the inner hole of the input end of the reducer 9 to be measured. The clamp 34 is used to be fitted on the outer periphery of the input end of the reducer 9 to be measured to lock the input end of the reducer 9 to be measured and the insert rod part 332. During measurement, the clamp 34 is first fitted onto the outer periphery of the input end of the reducer 9 to be measured. Then, the insertion rod 332 of the fixing member 33 is inserted into the inner hole of the input end of the reducer 9 to be measured. Finally, the screws on the clamp 34 are tightened, and the multiple fixing screws 35 pass through the multiple through holes on the plate-shaped part 331 and connect to the multiple internal threaded holes on the housing of the reducer 9 to be measured. This locks the input end of the reducer 9 to be measured, thus fixing the input end of the reducer 9 to be measured. In other embodiments, the input end fixing mechanism 3 may also be configured to include only a unidirectional input end fixing component.

[0070] The difference between this embodiment and embodiment 2 is that this embodiment also includes a washer 24 and a pair of pads 52 of the same height. The washer 24 is used to be placed between the housing of the reducer 9 to be measured and the base 2, and the pair of pads 52 are used to be detachably placed between a pair of uprights 5 and the base 2. By using the washer 24 and the pair of pads 52, the height of the precision plate 4 and the pressure sensor 6 relative to the base 2 can be changed respectively, so as to meet the measurement of reducers 9 of more sizes and specifications.

[0071] The difference between this embodiment and embodiment 2 is that the precision plate 4 in this embodiment is provided with fifteen mounting through holes 42, and the fifteen mounting through holes 42 and the dial indicator block 8 are evenly distributed with the rotation axis of the precision plate 4 as the center of symmetry.

[0072] Example 4

[0073] refer to Figure 9The difference between this embodiment and embodiment 3 is that, in this embodiment, the precision plate 4 is provided with an output end clamping hole 43 that penetrates its upper and lower surfaces. The axis of the output end clamping hole 43 is perpendicular to the upper surface of the base 2. The inner diameter of the output end clamping hole 43 is adapted to the outer diameter of the output end of the reducer 9 to be measured. An output end opening 44 communicating with the output end clamping hole 43 is provided on the end face of the precision plate 4 away from the pressure sensor 6. The output end opening 44 penetrates the upper and lower surfaces of the precision plate 4. Output end steps are respectively provided on the two side walls opposite to the output end opening 44. The output end threaded hole 46 and the output end stepped hole 45 are coaxially arranged. An output end fastening screw is provided in the output end stepped hole 45. The output end fastening screw passes through the output end opening 44 and connects to the output end threaded hole 46. An output end arc groove 47 is provided on the side of the precision plate 4 away from the pressure sensor 6, which is recessed towards the output end clamping hole 43. The output end arc groove 47 penetrates the upper and lower surfaces of the precision plate 4. The dial indicator block 8 is fixedly set on the side of the precision plate 4 away from the output end arc groove 47 by a pair of screws. The reducer 9 to be measured is a shaft output reducer. During measurement, after the output end of the reducer 9 to be measured is inserted into the output end clamping hole 43, the output end fastening screw is tightened, and the precision plate 4 is fixedly connected to the output end of the reducer 9 to be measured by friction. The setting of the arc groove 47 at the output end is beneficial to the deformation of the precision plate 4 on the side of the output end opening 44 near the arc groove 47 when the output end fastening screw is tightened, which can make the connection between the precision plate 4 and the output end of the reducer 9 to be measured more firm and reliable.

[0074] This utility model discloses a reducer rigidity measuring device with a simple structure and compact layout. It utilizes a design principle to convert data and employs short-distance, large-range force-measuring elements for the reducer. Following the rigidity calculation and measurement principle, it can accurately calculate the reducer's rigidity and other properties, obtaining high-precision measurement results with an accuracy of 0.01 N·m / arcmi. The base 2 is stable, and the overall structure of the device is primarily supported by the reducer 9 and the internal forces of the base 2, ensuring high safety and reliability, as well as reliable stability and high load-bearing capacity. The installation method uses screw connections, making it simple and easy to operate. Furthermore, it is applicable to the rigidity measurement of various types of reducers.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the specific technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of this utility model.

Claims

1. A device for measuring the rigidity of a speed reducer, characterized in that: Includes a bracket (1), a base (2), an input end fixing mechanism (3), a precision plate (4), a pressure sensor (6), a linear drive mechanism (7), a dial indicator or micrometer, a dial indicator block (8), and a pair of uprights (5); The base (2) is fixedly installed on the top of the bracket (1). The base (2) is provided with a reducer clearance hole (23). The base (2) on the outer periphery of the reducer clearance hole (23) is provided with at least one set of reducer mounting holes (21) for fixing the housing of the reducer (9) to be measured by fasteners. The input end fixing mechanism (3) is used to fix the input end (91) of the reducer (9) to be measured; Both of the aforementioned stands (5) are fixedly mounted on the upper surface of the base (2); The pressure sensor (6) is movably disposed between a pair of the stands (5) via a linear drive mechanism (7), and the moving direction of the pressure sensor (6) is parallel to the upper surface of the base (2). One end of the precision plate (4) is used to be fixedly connected to the output end of the reducer (9) to be measured, and the other end is used to extend to the moving path of the pressure sensor (6). The rotation axis of the precision plate (4) is perpendicular to the upper surface of the base (2). A pressure-bearing surface (41) for abutting against the pressure sensor (6) is provided on the other end of the precision plate (4) on the side close to the pressure sensor (6). The dial indicator block (8) is fixedly mounted on the precision plate (4), and the dial indicator or micrometer is mounted on the base (2) to cooperate with the dial indicator block (8) to measure the back clearance of the reducer (9) to be measured.

2. The reducer rigidity measuring device according to claim 1, characterized in that: Two pressure sensors (6) are provided, and the two pressure sensors (6) are respectively located on both sides of the other end of the precision plate (4). Each side of the other end of the precision plate (4) is provided with a pressure-bearing surface (41).

3. The reducer rigidity measuring device according to claim 2, characterized in that: It also includes a crossbeam (51), the two ends of which are fixedly connected to a pair of uprights (5); It also includes a pair of pads (52) of the same height, which are detachably disposed between a pair of uprights (5) and a base (2); It also includes a washer (24), which is used to be placed between the housing of the reducer (9) to be measured and the base (2); The linear drive mechanism (7) includes a screw (71), which is threadedly connected to a pair of uprights (5) respectively, and the axis of the screw (71) is parallel to the upper surface of the base (2); The pressure sensor (6) is a ring pressure sensor connected to a data display instrument. The pressure sensor (6) is fixedly mounted on the screw (71). A handwheel (72) is provided on at least one end of the screw (71).

4. The reducer rigidity measuring device according to claim 1, characterized in that: The dial indicator block (8) is provided with a measuring surface (81), which is perpendicular to the upper surface of the base (2); the base of the dial indicator or the micrometer is used to fix it on the base (2), and the probe of the dial indicator or the micrometer is used to abut against the measuring surface (81) perpendicularly. The upper surface of the dial indicator block (8) is provided with a dial indicator scale line (82) perpendicular to the measuring surface (81). The dial indicator scale line (82) is perpendicular to the moving direction of the pressure sensor (6), and the distance between the dial indicator scale line (82) and the rotation axis of the dial indicator plate (4) is greater than zero. The probe of the dial indicator or micrometer is aligned with the dial indicator scale line (82) in the initial measurement state.

5. The reducer rigidity measuring device according to any one of claims 1-4, characterized in that: The input terminal fixing mechanism (3) includes a reverse input terminal fixing component and / or a same-direction input terminal fixing component; The reverse input end fixing assembly includes a fixing member (33), a clamp (34), and multiple fixing screws (35). The fixing member (33) includes a plate-shaped part (331) and an insert rod part (332) integrally formed on the top of the plate-shaped part (331). The multiple fixing screws (35) are used to pass through multiple through holes provided on the plate-shaped part (331) and be fixedly connected to the housing of the reducer (9) to be measured. The insert rod part (332) is used to be inserted into the inner hole of the input end of the reducer (9) to be measured. The clamp (34) is used to be fitted on the outer periphery of the input end of the reducer (9) to lock the input end of the reducer (9) to be measured and the insert rod part (332). The same-direction input end fixing assembly includes a support plate (31), a fixing plate (32), and input end fastening screws; The lower end of the support plate (31) is fixedly connected to the base (2); one end of the fixing plate (32) is fixedly connected to the upper end of the support plate (31), and the other end is provided with an input end clamping hole (322) penetrating its upper and lower surfaces. The axis of the input end clamping hole (322) is perpendicular to the upper surface of the base (2), and the inner diameter of the input end clamping hole (322) is adapted to the outer diameter of the input end of the reducer (9) to be measured. The end face of the fixing plate (32) away from the support plate (31) is provided with a part that corresponds to the input end clamping hole (322). 322) A connected input end opening (323) is provided, and the input end opening (323) penetrates the upper and lower surfaces of the fixing plate (32). An input end stepped hole (324) and an input end threaded hole (325) are respectively provided on the two opposite side walls of the input end opening (323), and the input end stepped hole (324) and the input end threaded hole (325) are coaxially arranged. The input end fastening screw passes through the input end stepped hole (324) and the input end opening (323) and is connected to the input end threaded hole (325).

6. The reducer rigidity measuring device according to claim 5, characterized in that: The lower end of the support plate (31) is inserted into the lower limit hole (22) provided on the base (2), and the middle and lower part of the support plate (31) is fixedly connected to the base (2) by fasteners. The upper end of the support plate (31) is inserted into the upper limit hole (321) provided on the fixing plate (32), and the fixing plate (32) is fixedly connected to the middle and upper part of the support plate (31) by fasteners. The symmetry plane of the lower limit hole (22), the symmetry plane of the lower end of the support plate (31), the symmetry plane of the upper end of the support plate (31) and the symmetry plane of the upper limit hole (321) coincide, and the axis of the input end clamping hole (322) is located in the symmetry plane of the upper limit hole (321). The fixed plate (32) has an input end arc groove (326) recessed towards the input end clamping hole (322) on the side away from the support plate (31). The input end arc groove (326) penetrates the upper and lower surfaces of the fixed plate (32).

7. The reducer rigidity measuring device according to any one of claims 1-4, characterized in that: The precision plate (4) is provided with at least one set of mounting through holes (42), each set containing multiple mounting through holes (42), and the multiple sets of mounting through holes (42) are respectively used to fix and connect to the output end of the reducer (9) of various sizes and specifications by screws.

8. The reducer rigidity measuring device according to claim 7, characterized in that: The dial indicator block (8) is fixedly installed on the upper surface of the dial indicator plate (4); The mounting through holes (42) are provided in twelve numbers, which are divided into four groups according to one, three, six and two. The four groups of mounting through holes (42) are arranged in the order of one, three, six and two, and are spaced around the rotation axis of the precision plate (4).

9. The reducer rigidity measuring device according to any one of claims 1-4, characterized in that: The precision plate (4) is provided with an output end clamping hole (43) that penetrates its upper and lower surfaces. The axis of the output end clamping hole (43) is perpendicular to the upper surface of the base (2). The inner diameter of the output end clamping hole (43) is adapted to the outer diameter of the output end of the reducer (9) to be measured. The end face of the precision plate (4) away from the pressure sensor (6) is provided with an output end opening (44) that communicates with the output end clamping hole (43). The output end opening (44) penetrates the upper and lower surfaces of the precision plate (4). The two side walls opposite to the output end opening (44) are respectively provided with an output end stepped hole (45) and an output end threaded hole (46). The output end stepped hole (45) and the output end threaded hole (46) are coaxially arranged. An output end fastening screw is provided in the output end stepped hole (45). The output end fastening screw passes through the output end opening (44) and connects to the output end threaded hole (46). The side of the precision plate (4) away from the pressure sensor (6) is provided with an output end arc groove (47) that is recessed towards the output end clamping hole (43). The output end arc groove (47) penetrates the upper and lower surfaces of the precision plate (4). The dial indicator block (8) is fixedly installed on the side of the dial indicator plate (4) away from the arc groove (47) at the output end.

10. The reducer stiffness measuring device according to any one of claims 1-4, characterized in that: The base (2) on the outer periphery of the reducer clearance hole (23) is provided with 3-5 sets of reducer mounting holes (21). The 3-5 sets of reducer mounting holes (21) are used to fix the housing of 3-5 different sizes and specifications of the reducer (9) to be measured.

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