CN218002908U

CN218002908U - Testing device for plastic belt wheel of drum washing machine

Info

Publication number: CN218002908U
Application number: CN202222486199.6U
Authority: CN
Inventors: 陈康
Original assignee: Hisense Refrigerator Co Ltd
Current assignee: Hisense Refrigerator Co Ltd
Priority date: 2022-09-19
Filing date: 2022-09-19
Publication date: 2022-12-09
Anticipated expiration: 2032-09-19

Abstract

The utility model relates to a testing arrangement of drum type washing machine's plastics band pulley, this testing arrangement includes: a test frame; the fixing piece is fixed on the test frame and is vertically arranged; the washing machine shaft is arranged in a transverse extending mode, a first end of the washing machine shaft is connected with the fixing piece, and a second end of the washing machine shaft is used for mounting a tested belt wheel; a moving member arranged above the washing machine shaft in a lifting way; the driving shaft is hung at the bottom of the moving part and is positioned above the tested belt wheel; the driving shaft is connected with the tested belt wheel through a belt and can drive the tested belt wheel to rotate through the belt; a force sensor provided between the drive shaft and the moving member; and the displacement sensor is arranged on the test frame and is opposite to the tested belt wheel. The utility model discloses usable force transducer and displacement sensor measure the power value and the deformation volume that are received by the test band pulley, obtain accurate measured data to for the improvement by the test band pulley provides accurate help, practice thrift the improvement time.

Description

Testing device for plastic belt wheel of drum washing machine

Technical Field

The utility model relates to a transmission system's test equipment, in particular to drum type washing machine's testing arrangement of plastics band pulley.

Background

In the drum washing machine, the quality of the belt pulley directly influences the operation quality of the drum washing machine. At present, the pulley material of the drum washing machine is usually plastic instead of steel so as to reduce the product cost, and compared with a metal pulley, the plastic pulley is weaker in the aspects of strength, rigidity and the like, and a test is needed to determine whether the pulley meets the design requirements.

In the prior art, the test on the belt pulley of the drum washing machine is carried out in an original matching machine, or the test equipment for the belt pulley of the drum washing machine cannot accurately obtain the stress condition and the deformation condition of the tested belt pulley, and cannot provide accurate data for the improvement of the follow-up belt pulley, so that the improvement time is increased, and the follow-up improvement cost is increased.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a drum type washing machine's testing arrangement of plastics band pulley to the atress condition of reduction by the test band pulley at drum type washing machine during operation, and the accuracy reachs the atress condition and the deformation volume by the test band pulley.

In order to solve the technical problem, the utility model adopts the following technical scheme:

according to an aspect of the utility model, the utility model provides a testing arrangement of drum type washing machine's plastics band pulley, include:

a test frame;

the fixing piece is fixed on the test frame and is vertically arranged;

the washing machine shaft is arranged in a transverse extending manner; the first end of the washing machine shaft is connected with the fixed part, and the second end of the washing machine shaft is used for mounting a tested belt wheel;

the moving piece is arranged above the second end of the washing machine shaft in a lifting manner and is positioned above the tested belt wheel;

the driving shaft is hung at the bottom of the moving part and is positioned above the tested belt wheel; the driving shaft is connected with the tested belt wheel through a belt and can drive the tested belt wheel to rotate through the belt;

the force sensor is arranged between the driving shaft and the moving part and used for testing the force between the driving shaft and the moving part;

and the displacement sensor is arranged on the test frame and is opposite to the tested belt wheel so as to measure the deformation quantity of the tested belt wheel.

In some embodiments of the present application, the test rack comprises a base plate and a guide rail; the bottom plate is horizontally arranged, and the guide rail vertically extends upwards from the bottom plate; the moving member is connected to the guide rail in a sliding mode and slides on the guide rail along the vertical direction.

In some embodiments of the present application, there are two of the guide rails, and the two guide rails are arranged in parallel; the moving piece is a cross beam, two through holes are formed in two ends of the cross beam, and one end of the cross beam is slidably sleeved on one guide rail through one through hole; the other end of the cross beam is slidably sleeved on the other guide rail through the other through hole.

According to some embodiments of the application, the test jig further comprises a fixing support, the fixing support is arranged vertically, the fixing support is of a frame structure, and the fixing piece is fixed in the fixing support.

In some embodiments of the present application, the fixing member is a tripod, the circumference of the tripod has three ends, and the three ends of the tripod are respectively fixed to the fixing brackets.

In some embodiments of the present application, a tension meter is disposed on the fixing bracket, and the tension meter is movably disposed on the fixing bracket; the tension meter is opposite to the belt to measure a frequency of the belt.

In some embodiments of the present application, a connecting member is further disposed between the moving member and the driving member; the connecting piece is hung and is established in the below of moving member, force sensor locates between connecting piece and the moving member, the drive shaft rotationally locates the lower extreme of connecting piece.

In some embodiments of the present application, the displacement sensor comprises a first displacement sensor and a second displacement sensor; the first displacement sensor is positioned below the tested belt wheel and is opposite to the peripheral wall of the tested belt wheel so as to measure the radial deformation of the tested belt wheel; the second displacement sensor is located on one side of the tested pulley in the axial direction to measure the axial deformation amount of the tested pulley.

In some embodiments of the present application, the test rack further comprises a first support column and a second support column; the first supporting column and the second supporting column are arranged on the bottom plate, extend upwards from the bottom plate and are arranged below the tested belt wheel; the second supporting column extends upwards from the bottom plate and is arranged on one side of the tested belt wheel; the first displacement sensor is arranged on the first supporting column, and the second displacement sensor is arranged on the second supporting column.

In some embodiments of the present application, the first support column and the second support column are both retractable structures.

According to the above technical scheme, the embodiment of the utility model provides an at least, following advantage and positive effect have:

in the testing device for the plastic belt wheel of the drum washing machine, the driving shaft and the tested belt wheel can be connected by using the belt, so that the rotation of the driving shaft drives the rotation of the tested belt wheel, and the tested belt wheel can be tested; one end of the washing machine shaft is fixed on the fixing part, and the other end of the washing machine shaft is provided with the tested belt wheel, so that the actual stress condition of the tested belt wheel in the drum washing machine can be simulated and restored, and the testing device can better meet the actual requirement; the driving shaft can be driven by the movable element to move up and down, so that the belt testing device can adapt to tested belt wheels of different models without replacing a belt; the power between usable force transducer measurement drive shaft and the moving member drives through the drive shaft and is tested the band pulley and rotate to obtain the power value that is received by the test band pulley, utilize displacement sensor to measure the deformation volume of being tested the band pulley in corresponding side, thereby the accuracy obtains the measured data by the test band pulley, and then can provide accurate help for the improvement of being tested the band pulley, and then can practice thrift the improvement time, reduce and improve the cost.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of the test rack.

Fig. 3 is a schematic view of the structure of the fixing bracket and the fixing member.

Fig. 4 is a schematic view of the structure of the fixed washing machine shaft of fig. 3.

Fig. 5 is a schematic structural view of the pulley to be tested mounted on fig. 4.

Fig. 6 is a schematic view of a portion of fig. 1.

Fig. 7 is an enlarged view of a portion a in fig. 6.

Fig. 8 is an enlarged view of a portion B in fig. 6.

Fig. 9 is a schematic view of a portion of fig. 1.

Fig. 10 is a left side view of fig. 9.

Fig. 11 is an enlarged view of portion C of fig. 9.

The reference numerals are explained below: 100. a tested belt wheel; 1. a test frame; 11. a base plate; 12. fixing a bracket; 13. a guide rail; 14. a support pillar; 141. a first support column; 142. a second support column; 2. a fixing member; 3. a washing machine shaft; 4. a drive shaft; 5. a belt; 6. a moving member; 71. a force sensor; 72. a displacement sensor; 721. a first displacement sensor; 722. a second displacement sensor; 73. a tension meter; 8. a connecting member; 81. a connecting plate; 82. and (7) lifting lugs.

Detailed Description

Exemplary embodiments that embody features and advantages of the present invention will be described in detail in the following description. It is to be understood that the invention is capable of other and different embodiments and its several details are capable of modification without departing from the scope of the invention, and that the description and drawings are to be regarded as illustrative in nature and not as restrictive.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

In the prior art, the belt pulley of the drum washing machine is tested either in an original matching machine or a testing device for the belt pulley of the washing machine cannot accurately obtain the stress condition and the deformation condition of the tested belt pulley, and cannot provide accurate data for the improvement of the follow-up belt pulley, so that the improvement time is prolonged, and the follow-up improvement cost is increased.

Referring to fig. 1, a testing apparatus for a plastic belt pulley of a drum washing machine according to an embodiment of the present invention mainly includes a testing frame 1, a fixing member 2, a washing machine shaft 3, a driving shaft 4, a belt 5, a moving member 6, a force sensor 71, a displacement sensor 72, and a tension gauge 73.

Wherein, test jig 1 is the support body structure, and test jig 1 is used for providing installation space for mounting 2, washing machine shaft 3, drive shaft 4, belt 5, moving member 6, force sensor 71, displacement sensor 72 and tensiometer 73.

Fig. 2 is a schematic structural view of the test rack 1. Fig. 3 is a schematic view of the structure of the fixing bracket 12 and the fixing member 2. Fig. 4 is a schematic view of the structure of the fixed washing machine shaft 3 of fig. 3. Fig. 5 is a schematic view of the structure of fig. 4 on which the pulley 100 under test is mounted.

Referring to fig. 2 to 5, in some embodiments, the test rack 1 mainly includes a bottom plate 11 and a fixing bracket 12.

Wherein, the bottom plate 11 is used as the bottom of the test frame 1, and the bottom plate 11 is used for stably placing the whole test frame 1 on the bottom surface or the working table surface. Meanwhile, the base plate 11 serves to support the fixing bracket 12, the guide rail 13, and the support column 14. In some embodiments, the bottom plate 11 is horizontally disposed, and the bottom plate 11 is configured as a planar plate-shaped structure, so that the supporting function of the bottom plate 11 is more stable, and further, the test of the pulley 100 to be tested is more stable, and thus, an accurate test result can be obtained. The base plate 11 has a rectangular configuration, but it will be appreciated that the base plate 11 may have other configurations such as circular, trapezoidal, etc.

In some embodiments, the fixing bracket 12 is provided on the base plate 11, and the fixing bracket 12 is vertically disposed on the base plate 11. The fixing bracket 12 is used for fixedly mounting the fixing member 2.

In some embodiments, a fixing member 2 is provided on the test rack 1, and the fixing member 2 is used to fixedly mount the washing machine shaft 3.

In some embodiments, the fixing bracket 12 presents a frame structure, and the fixing member 2 is fixed in the fixing bracket 12. The fixing member 2 is arranged vertically. The fixing element 2 is connected to the frame structure of the fixing support 12 so that the fixing element 2 can be fixed to the frame structure of the fixing support 12.

Referring to fig. 3 to 5, in some embodiments, the fixing member 2 is a tripod in some embodiments. The tripod has three ends on the peripheral side thereof, one of which is fixed to the base plate 11 and the other two of which are fixed to both sides of the fixed bracket 12.

It should be noted that in other embodiments, the fixing member 2 may also have a plate shape or other structures with multiple end portions.

Referring to fig. 4 and 5, in some embodiments, a washing machine shaft 3 is provided at one side of the fixing member 2. A first end of the washing machine shaft 3 is connected to the fixing member 2, a second end of the washing machine shaft 3 is used for mounting the pulley 100 to be tested, and the pulley 100 to be tested is rotatably provided at the second end of the washing machine shaft 3. The washing machine shaft 3 is arranged extending transversely. The pulley 100 to be tested is vertically arranged in parallel with the pulley 100 to be tested, so that the washing machine shaft 3, the fixing member 2 and the pulley 100 to be tested are coaxial. It should be noted that the fixing member 2, the washing machine shaft 3 and the tested belt wheel 100 are coaxial, and inside the drum washing machine, the fixing member 2 can be connected with the inner tub of the drum washing machine, so that the inner tub can be driven to rotate by the rotation of the tested belt wheel 100. This testing arrangement passes through washing machine axle 3 and connects mounting 2 can simulate, the reduction is tested the mounted state of band pulley 100 in drum type washing machine, and then the simulation is tested the atress condition of band pulley 100 at actual drum type washing machine during operation, and then makes the utility model discloses a testing arrangement's test is more accurate.

In some embodiments, the washing machine shaft 3 is a detachable structure, and can be replaced according to the size requirements of different types of plastic belt pulleys, so that the requirements of different types of plastic belt pulleys can be met, and the test is more accurate. The tested pulley 100 installed at the second end of the washing machine shaft 3 is also a detachable structure so that it is possible to test pulleys of different models, thereby saving the test cost.

Fig. 6 is a schematic view of a portion of fig. 1. Fig. 7 is an enlarged view of a portion a in fig. 6.

Referring to fig. 6 and 7, in some embodiments, the driving shaft 4 is disposed above the pulley 100 to be tested, and the driving shaft 4 is connected to the pulley 100 to be tested through the belt 5. The external motor (not shown in the figure) of drive shaft 4, the motor can provide power for drive shaft 4 to drive shaft 4 can rotate under the drive of motor, and then drive the band pulley 100 that is tested through belt 5 and rotate, and then test the band pulley 100 that is tested.

In some embodiments, the motor can adjust the power according to different types of plastic pulleys, so as to provide power for different powers of the driving shaft 4, and thus different tested pulleys 100 with different strengths can be tested.

In some embodiments, the drive shaft 4 is provided as a removable structure, so that it can be replaced according to the size requirements of different types of plastic pulleys.

Referring to fig. 1 and 2, in some embodiments, the moving member 6 is disposed horizontally, and the moving member 6 is disposed above the driving shaft 4. The moving member 6 is used for connecting the driving shaft 4, so that the driving shaft 4 is hung at the bottom of the moving member 6, and the driving shaft 4 is arranged above the tested belt wheel 100, and simultaneously, the belt 5 between the driving shaft 4 and the tested belt wheel 100 is tensioned.

In some embodiments, the moving member 6 is horizontally arranged. The moving member 6 is provided with a through hole (not shown). Meanwhile, the test rack 1 further comprises a guide rail 13, the guide rail 13 is arranged on the bottom plate 11, the guide rail 13 is formed by extending the bottom plate 11 in the vertical direction, and the guide rail 13 is vertically arranged. The guide rail 13 is arranged on one side of the fixed support 12, the guide rail 13 is of a cylindrical structure, and the guide rail 13 and the fixed support 12 are parallel to each other. The guide rail 13 is used for mounting the fixed moving member 6.

In some embodiments, there are two through holes on the moving member 6, and two through holes are provided at both ends of the moving member 6. The guide rails 13 are provided in two, and the two guide rails 13 are arranged in parallel. Two through-holes and two guide rail 13 one-to-one for two guide rail 13 run through two through-holes, so can sliding connection between moving member 6 and two guide rail 13, thereby moving member 6 can slide from top to bottom along guide rail 13.

It should be noted that in other embodiments, the number of the through holes may be one or more than two. It should be noted that, in other embodiments, the number of the guide rails 13 may also be one or more than two, and the number of the through holes corresponds to the number of the guide rails 13, which is not limited herein.

In some embodiments, the external power device (not shown in the figure) of moving member 6, power device can provide power for moving member 6 to moving member 6 can carry out the lifting movement through power device, and then can drive shaft 4 and carry out the lifting movement, and then can be under the condition of not changing belt 5, can test the plastics band pulley of different models, and then practiced thrift test cost.

In some embodiments, the moving member 6 may be a beam. The moving member 6 may have another structure.

Referring to fig. 6 and 7, in some embodiments, a connecting member 8 is disposed between the driving shaft 4 and the moving member 6, and the connecting member 8 is suspended at the bottom of the moving member 6. The driving shaft 4 is fixed at the bottom of the connecting piece 8, and the driving shaft 4 is rotatably connected with the bottom of the connecting piece 8. The connecting member 8 is used for connecting the moving member 6 and the driving shaft 4, so that the driving shaft 4 can be hung at the bottom of the moving member 6.

In some embodiments, the connecting member 8 includes a connecting plate 81 and two lifting lugs 82 extending downward from both ends of the connecting plate 81, respectively. The connecting plate 81 comprises a top plate and two side plates extending downwards, the connecting plate 81 is of a U-shaped structure with a downward opening, and the top surface of the connecting plate 81 is connected with the bottom surface of the moving part 6. The two lifting lugs 82 are oppositely arranged, and through holes (not shown) are formed in the two lifting lugs 82, so that the driving shaft 4 is rotatably connected between the two lifting lugs 82 through the through holes.

In some embodiments, the force sensor 71 is disposed between the moving member 6 and the connecting member 8, specifically, the upper end of the force sensor 71 is suspended on the bottom surface of the moving member 6, the lower end of the force sensor 71 is connected to the top surface of the connecting plate 81 through a connecting rope for measuring the stress condition of the connecting member 8 at the lower end of the force sensor 71, the driving shaft 4 is fixed through the connecting member 8, and the driving shaft 4 is connected to the tested pulley 100, so as to obtain the stress condition of the tested pulley 100 and obtain an accurate force value. By accurately obtaining the stress value of the tested pulley 100, reasonable help can be provided for the improvement of the tested pulley 100, and further, the improvement time can be saved, and the improvement cost can be reduced.

It should be noted that, in some other embodiments, the upper end of the force sensor 71 may also be connected to the bottom surface of the moving member 6 through a connecting rope, and the lower end of the force sensor 71 is directly connected to the connecting plate 81.

It should be noted that in other embodiments, the upper end of the force sensor 71 may be connected to the bottom surface of the moving member 6 through a connecting rope, and the lower end of the force sensor 71 is connected to the top surface of the connecting plate 81 through a connecting rope.

In some embodiments, the force sensor 71 is external to a processor (not shown) and a display device (not shown). The display device can read and store the force value measured by the force sensor 71, so that the stress value of the tested belt wheel 100 can be accurately obtained. Through the external treater of force sensor 71, treater and display device are connected to the user can directly carry out operations such as zero setting and calibration at display device to force sensor 71, and then can simulate the atress condition of plastics band pulley in actual drum type washing machine, thereby can obtain the test result of being tested band pulley 100 more accurately.

Fig. 8 is an enlarged view of a portion B in fig. 6.

Referring to fig. 8, in some embodiments, the displacement sensor 72 includes a first displacement sensor 721 and a second displacement sensor 722. The first displacement sensor 721 is disposed below the pulley 100 to be tested, and is opposite to the peripheral wall of the pulley 100 to be tested, so as to measure the radial displacement of the pulley 100 to be tested; the second displacement sensor 722 is disposed on one side of the pulley 100 under test, and is axially opposite to the pulley 100 under test, for measuring the axial displacement of the pulley 100 under test.

It should be noted that, in other embodiments, the number of the first displacement sensors 721 may be plural; the number of the second displacement sensors 722 may be plural.

It should be noted that in other embodiments, only the first displacement sensor 721 or only the second displacement sensor 722 may be provided.

Referring to fig. 8, in some embodiments, the test rack 1 further includes a support column 14. The support columns 14 are provided on the floor, and the support columns 14 are arranged vertically. The support columns 14 are provided in two, including a first support column 141 and a second support column 142. Wherein, the first supporting column 141 extends upwards from the bottom plate 11 and is arranged below the tested belt wheel 100; the second supporting column 142 extends upward from the base plate 11 and is provided at one side of the pulley 100 to be tested. The first displacement sensor 721 is disposed on the top surface of the first supporting column 141, the second displacement sensor 722 is disposed on the side surface of the second supporting column 142, and the second displacement sensor 722 is located on one axial side of the pulley 100 under test.

It should be noted that, in other embodiments, the number of the supporting columns 14 may be one or more than two, as long as the number corresponds to the number of the displacement sensors 72, and is not limited herein.

In some embodiments, the first support column 141 is provided with a telescopic structure, and the height of the first support column 141, and thus the height of the first displacement sensor 721, can be adjusted according to the size of the plastic pulley. The second supporting column 142 is of a telescopic structure, and the height of the second supporting column 142 and the height of the second displacement sensor 722 can be adjusted according to the size of the plastic belt wheel. Meanwhile, the first displacement sensor 721 and the second displacement sensor 722 are driven to move by the telescopic movement of the first support column 141 and the second support column 142, so that deformation of different types of plastic belt wheels can be tested, the device is simpler and more convenient, and the testing cost is saved.

In some embodiments, the displacement sensor 72 is connected to a display device, and the user can directly obtain the deformation amount of the tested pulley 100 on the display device. Therefore, the deformation amount of the pulley 100 to be tested is obtained by measuring the displacement amount in the corresponding direction, and whether the strength of the pulley 100 to be tested is qualified or not can be further judged. Besides, by accurately obtaining the deformation data of the tested pulley 100, accurate assistance can be provided for the improvement of the tested pulley 100, so that the improvement time can be saved, and the improvement cost can be reduced.

Fig. 9 is a schematic view of a portion of fig. 1. Fig. 10 is a left side view of fig. 9. Fig. 11 is an enlarged view of a portion C in fig. 9.

Referring to fig. 9-11, in some embodiments, a tension gauge 73 is provided on the fixed bracket 12. The tension gauge 73 is provided on one side of the belt 5, and is opposed to the belt 5. The tensiometer 73 can measure the frequency of the belt 5 by sensing the vibration of the sound wave around the belt 5 when the drive shaft 4 rotates the pulley 100 to be tested.

In some embodiments, the tension meter 73 is movable on the fixed bracket 12 so as to adjust the belt 5 according to the moving member 6, so as to adjust the position of the tension meter 73, and thus, different types of plastic pulleys can be tested.

In some embodiments, tension meter 73 is connected to a display device. The user can display the frequency of the belt 5 directly on the display means. Through the frequency value of the read belt 5, a user can directly perform zero setting, calibration and other operations on the force sensor 71 on the display device, so that the frequency of the belt 5 is adjusted, the stress condition of the plastic belt wheel in the actual drum washing machine can be simulated, and the test result of the tested belt wheel 100 can be obtained more accurately.

in the testing device for the plastic belt wheel of the drum washing machine of the embodiment of the utility model, the belt 5 can be used for connecting the driving shaft 4 and the tested belt wheel 100, so that the rotation of the driving shaft 4 drives the rotation of the tested belt wheel 100, and the tested belt wheel 100 can be tested; one end of the washing machine shaft 3 is fixed on the fixing part 2, and the other end is provided with the tested belt wheel 100, so that the actual stress condition of the tested belt wheel 100 in the drum washing machine can be simulated, and the testing device can better meet the actual requirement; the movable piece 6 can drive the driving shaft 4 to move up and down, so that the belt testing device can be suitable for belt wheels 100 to be tested in different models without replacing the belt 5; the force sensor 71 can be used for measuring the force between the driving shaft 4 and the moving member 6, the driving shaft 4 drives the tested belt wheel 100 to rotate, so that the force value received by the tested belt wheel 100 is obtained, the displacement sensor 72 is used for measuring the deformation quantity of the tested belt wheel in the corresponding direction, so that the measured data of the tested belt wheel 100 are accurately obtained, accurate help can be provided for improvement of the tested belt wheel 100, the improvement time can be saved, and the improvement cost is reduced.

While the present invention has been described with reference to several exemplary embodiments, it is understood that the terms used are words of description and illustration, rather than words of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.

Claims

1. A testing device for a plastic belt wheel of a drum washing machine is characterized by comprising:

a test jig;

the fixing piece is fixed on the test frame and is vertically arranged;

the washing machine shaft is transversely extended and arranged; the first end of the washing machine shaft is connected with the fixed part, and the second end of the washing machine shaft is used for mounting a tested belt wheel;

the driving shaft is hung at the bottom of the moving piece and is positioned above the tested belt wheel; the driving shaft is connected with the tested belt wheel through a belt and can drive the tested belt wheel to rotate through the belt;

2. The apparatus for testing a plastic pulley of a drum washing machine according to claim 1, wherein the test rack comprises a bottom plate and a guide rail; the bottom plate is horizontally arranged, and the guide rail vertically extends upwards from the bottom plate;

the moving member is connected on the guide rail in a sliding mode and slides on the guide rail along the vertical direction.

3. The apparatus for testing plastic pulley of drum washing machine as claimed in claim 2, wherein there are two guide rails, and the two guide rails are disposed in parallel;

the moving piece is a cross beam, two through holes are formed in two ends of the cross beam, and one end of the cross beam is slidably sleeved on one guide rail through one through hole; the other end of the cross beam is slidably sleeved on the other guide rail through the other through hole.

4. The apparatus for testing plastic belt pulley of drum washing machine as claimed in claim 2, wherein the testing jig further comprises a fixing bracket, the fixing bracket is vertically arranged, the fixing bracket is in a frame structure, and the fixing member is fixed in the fixing bracket.

5. The apparatus for testing a plastic pulley of a drum washing machine according to claim 4, wherein the fixing member is a tripod having three ends at a circumferential side thereof, and the three ends of the tripod are respectively fixed to the fixing brackets.

6. The apparatus for testing plastic pulley of drum washing machine as claimed in claim 4, wherein the fixing bracket is provided with a tension gauge, and the tension gauge is movably provided on the fixing bracket; the tension meter is opposite to the belt to measure a frequency of the belt.

7. A testing apparatus for a plastic pulley of a drum washing machine according to claim 1, wherein a connecting member is further provided between the moving member and the driving shaft; the connecting piece is hung below the moving piece, the force sensor is arranged between the connecting piece and the moving piece, and the driving shaft is rotatably arranged at the lower end of the connecting piece.

8. The apparatus for testing a plastic pulley of a drum washing machine according to claim 2, wherein the displacement sensor comprises a first displacement sensor and a second displacement sensor;

the first displacement sensor is positioned below the tested belt wheel and is opposite to the peripheral wall of the tested belt wheel so as to measure the radial deformation of the tested belt wheel; the second displacement sensor is located on one axial side of the tested pulley to measure the axial deformation amount of the tested pulley.

9. The apparatus of claim 8, wherein the test rack further comprises a first support column and a second support column; the first supporting column and the second supporting column are arranged on the bottom plate, extend upwards from the bottom plate and are arranged below the tested belt wheel; the second supporting column extends upwards from the bottom plate and is arranged on one side of the tested belt wheel;

the first displacement sensor is arranged on the first supporting column, and the second displacement sensor is arranged on the second supporting column.

10. The apparatus for testing a plastic pulley of a drum washing machine according to claim 9, wherein the first support column and the second support column are both of a telescopic structure.