A life limit load test bench for a floor sweeper bearing sleeve and its test method

Abstract

The present invention discloses a life limit load test bench for a floor sweeper bearing sleeve and a test method thereof, which relates to the technical field of floor sweeper accessory testing. The test bench includes a test base, on which a controller is provided. A hydraulic cylinder for driving a lifting table to adjust the Y-axis position is fixedly connected inside the test base, and a driving motor is fixedly connected to the lifting table. A middle receiving table is fixedly connected to the side wall of the test base, and a through hole is embedded in the middle end of the middle receiving table. A linear driver is fixedly connected to the bottom of the test base. By accelerating the bearing wear with the limit load and combining the mutation points of torque and speed data, the fatigue failure threshold of the bearing sleeve can be accurately determined. Through precise sensing technology and intelligent control, the bottleneck of the traditional bearing test bench with single function and limited environmental simulation is broken through, providing an efficient and reliable test platform for the life prediction, failure analysis and product iteration of the floor sweeper bearing sleeve, and significantly improving the R & D efficiency and product quality control level.

Description

Technical Field

[0001] The present invention relates to the technical field of testing accessories for floor sweepers, and particularly to a life limit load test bench for a bearing sleeve of a floor sweeper and a testing method thereof. Background Art

[0002] When testing the bearing and bearing sleeve of a floor sweeper in the prior art, they are often placed on a test bench and the inner ring of the bearing is driven to rotate by a driver to test the bearing life. Moreover, the test bench has the bottlenecks of single function and limited environmental simulation, and cannot perform good tests on the bearing. Summary of the Invention

[0003] Therefore, to solve the above deficiencies, the present invention provides a life limit load test bench for a bearing sleeve of a floor sweeper and a testing method thereof.

[0004] The present invention is implemented as follows. A life limit load test bench for a bearing sleeve of a floor sweeper and a testing method thereof are constructed. The device includes a test base, on which a controller is provided. A hydraulic cylinder for driving the lifting table to adjust the Y-axis position is fixedly connected inside the test base, and a driving motor is fixedly connected to the lifting table. A middle receiving table is fixedly connected to the side wall of the test base, and a through hole is embedded in the middle of the middle receiving table. A linear driver is fixedly connected to the bottom of the test base, and the moving end of the linear driver is fixedly connected to a contact component and drives the contact component to be slidably connected to the bottom of the test base. The contact component includes a belt conveyor main body, the housing of the belt conveyor main body is fixedly connected to the linear driver, and multiple contact surfaces are provided on the belt surface of the belt conveyor main body, and the frictions between the multiple contact surfaces are different. The belt can facilitate the single friction test or continuous friction transformation test of the bearing.

[0005] In a feasible implementation manner, a test component is fixedly connected to the bottom of the lifting table. The test component includes a test shell, which is fixedly connected to the bottom of the lifting table. The output shaft of the driving motor drives a driving shaft to be rotatably connected to the inner side wall of the test shell, and the driving shaft is connected to a torque sensor through a coupling.

[0006] In a feasible implementation manner, the torque sensor drives a driven shaft to be rotatably connected to the other end of the test shell far from the driving motor through another coupling. A reflective sticker is connected to the driven shaft, a measuring instrument is bolted inside the test shell, and an adsorption magnetic ring is fixedly connected to the side wall of the other end of the driven shaft far from the torque sensor.

[0007] In a feasible implementation manner, limiting components are fixedly connected to the left and right ends of the top of the middle receiving table. The limiting components include electric push rods, which are bolted to the top of the middle receiving table. The telescopic end of the electric push rod is fixedly connected to a limiting frame, and an arc-shaped sliding groove is embedded in the inner side wall of the limiting frame.

[0008] In a feasible implementation, a driving rope is slidably connected in the arc-shaped chute. The driving rope and the elastic rope are respectively fixedly connected to both ends of the sliding rod. The other end of the elastic rope away from the sliding rod is fixedly connected to the side wall of the arc-shaped chute, and the sliding rod is slidably matched with the arc-shaped chute.

[0009] In a feasible implementation, a conveying pipe is embedded in the side wall of the limiting frame. The conveying pipe is fixedly connected to the telescopic hose through the opening at its end. The other end of the telescopic hose communicates with the inner cavity of the limiting frame, and the bottom of the telescopic hose is fixedly connected to the sliding rod.

[0010] In a feasible implementation, a driving wheel is rotatably connected in the conveying pipe. The center of the driving wheel is fixedly connected to the incomplete gear. The incomplete gear meshes with the driven gear, and the driven gear is rotatably connected to the side wall of the conveying pipe through a torsion spring.

[0011] In a feasible implementation, the driven gear is fixedly connected to the winding drum. The driving rope is wound on the winding drum, and the driving rope slides through the inner side wall of the limiting frame and enters the arc-shaped chute.

[0012] A test method for the life limit load test bench of a sweeper bearing sleeve includes the following steps;

[0013] S1: When conducting the test, connect the side brush of the sweeper and the connecting shaft of the side brush to the bearing, and the connecting shaft of the side brush passes through the through hole and is fixedly connected to the inner ring of the bearing above. The bottom of the side brush contacts the contact surface on the belt; then place the two bearing sleeves equipped with bearings at the upper and lower ends of the limiting frame respectively, and control the electric push rods at the left and right ends to drive the limiting frame to move, so that the two limiting frames wrap the bearing sleeves at the upper and lower ends, and make the two limiting frames squeeze and contact each other to be in a closed state;

[0014] S2: Then drive the hydraulic cylinder to drive the lifting platform and the driving motor to move downward, so that the driven shaft is inserted into the bearing, and turn on the adsorption magnetic ring to make the adsorption magnetic ring generate adsorption with the inner ring of the bearing. Turn on the driving motor to drive the driving shaft to rotate. The driving shaft drives the driven shaft to rotate through the coupling and the torque sensor, and the driven shaft drives the inner ring of the bearing to rotate;

[0015] S3: The inner ring of the bearing drives the side brush to rotate, so that the side brush contacts the contact surface on the belt. Push the main body of the belt conveyor to move back and forth through the linear actuator, so that the contact surface moves back and forth while the side brush rotates, simulating the working scenario of the sweeper moving on the actual ground.

[0016] The present invention has the following advantages: The present invention provides a life limit load test bench for a sweeper bearing sleeve and its test method by improvement. Compared with the same type of equipment, the following improvements are made:

[0017] The present invention relates to a life limit load test bench for a floor sweeper bearing sleeve and its test method. By using different materials such as silicone pads, felts, and sandpapers, it accurately simulates the ground friction characteristics of hard floors, carpets, tiles, etc. The bidirectional motion is superimposed: the compound motion of the side brush rotation and the reciprocating / continuous movement of the belt, truly restoring the dynamic friction load during the movement of the floor sweeper. The belt conveyor can cyclically switch different contact surfaces to achieve continuous testing under multiple working conditions without manual intervention. The belt can facilitate the single friction force test or the continuous friction force transformation test of the bearing.

[0018] The present invention relates to a life limit load test bench for a floor sweeper bearing sleeve and its test method. By injecting air containing impurities such as oil stains, moisture, and sand and gravel into the limiting frame through a conveying pipe, it simulates the sealing failure risk of the floor sweeper in a polluted environment. The telescopic hose swings at multiple angles, causing the impurities to impact the bearing sleeve from different directions to test the reliability of the sealing structure. High-temperature or low-temperature air can be input, and combined with a temperature sensor to monitor the temperature rise inside the bearing sleeve, evaluating the shear stability of the grease at different temperatures and the change in the starting torque of the bearing.

[0019] The present invention relates to a life limit load test bench for a floor sweeper bearing sleeve and its test method. By accelerating the bearing wear through the limit load (such as a high-friction sandpaper contact surface + impurity impact + high-temperature environment), combined with the mutation points of the torque and speed data, accurately determining the fatigue failure threshold of the bearing sleeve. Through precise sensing technology and intelligent control, it breaks through the bottleneck of the single function and limited environmental simulation of the traditional bearing test bench, providing an efficient and reliable test platform for the life prediction, failure analysis, and product iteration of the floor sweeper bearing sleeve, significantly improving the R & D efficiency and product quality control level. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is the structural schematic of the present invention Figure 1 ;

[0021] Figure 2 is the structural schematic of the present invention Figure 2 ;

[0022] Figure 3 is the structural schematic of the present invention Figure 3 ;

[0023] Figure 4 is the structural schematic of the present invention Figure 4 ;

[0024] Figure 5 is the structural schematic diagram of the test component of the present invention;

[0025] Figure 6 is the structural schematic of the limiting component of the present invention Figure 1 ;

[0026] Figure 7 Schematic diagram of the limiting component structure of the present invention Figure 2 .

[0027] Among them: test base - 1, controller - 2, hydraulic cylinder - 3, lifting table - 4, driving motor - 5, test component - 6, middle receiving table - 7, limiting component - 8, through hole - 9, linear actuator - 10, contact component - 11, test shell - 61, driving shaft - 62, coupling - 63, torque sensor - 64, driven shaft - 65, reflective sticker - 66, measuring instrument - 67, adsorption magnetic ring - 68, electric push rod - 81, limiting frame - 801, arc-shaped chute - 82, driving rope - 83, elastic rope - 84, sliding rod - 85, telescopic hose - 86, conveying pipe - 87, driving wheel - 871, incomplete gear - 872, driven gear - 873, winding drum - 874, belt conveyor main body - 111, belt - 112, contact surface - 113. Specific implementation mode

[0028] Next, the present invention will be described in detail in conjunction with the attached Figures 1 - 7 The present invention will be clearly and completely described for the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative work belong to the scope of protection of the present invention.

[0029] Please refer to Figures 1 to 7 , a life limit load test bench for a bearing sleeve of a floor sweeper and its test method of the present invention, including a test base 1, a controller 2 is provided on the test base 1, a hydraulic cylinder 3 for driving the lifting table 4 to adjust the Y-axis position is fixedly connected inside the test base 1, the telescopic end of the hydraulic cylinder 3 is fixedly connected to the lifting table 4, a driving motor 5 is fixedly connected to the lifting table 4, and a test component 6 is fixedly connected to the bottom of the lifting table 4; the controller 2 is electrically connected to the hydraulic cylinder 3, the driving motor 5, the linear actuator 10, the torque sensor 64, the measuring instrument 67, the adsorption magnetic ring 68, the electric push rod 81, and the belt conveyor main body 111; the data detected by the torque sensor 64 and the measuring instrument 67 can be transmitted into the controller 2.

[0030] Specifically, a middle receiving table 7 is fixedly connected to the side wall of the test base 1, limiting components 8 are fixedly connected to the left and right ends of the top of the middle receiving table 7, and a through hole 9 is embedded in the middle end of the middle receiving table 7.

[0031] Specifically, a linear actuator 10 is fixedly connected to the bottom of the test base 1, and the moving end of the linear actuator 10 is fixedly connected to the contact component 11 and drives the contact component 11 to be slidably connected to the bottom of the test base 1.

[0032] Specifically, the test component 6 includes a test housing 61. The test housing 61 is fixedly connected to the bottom of the lifting table 4. The output shaft of the driving motor 5 drives the driving shaft 62 to be rotationally connected to the inner side wall of the test housing 61. The output shaft of the driving motor 5 is fixedly connected to the driving shaft 62. The driving shaft 62 is connected to the torque sensor 64 through a coupling 63. The torque sensor 64 can test the torque of the bearing. The torque sensor 64 drives the driven shaft 65 to be rotationally connected to the other end of the test housing 61 away from the driving motor 5 through another set of couplings 63. A reflective sticker 66 is connected to the driven shaft 65. A measuring instrument 67 is bolted in the test housing 61. An adsorption magnetic ring 68 is fixedly connected to the side wall of the other end of the driven shaft 65 away from the torque sensor 64. The measuring instrument 67 and the reflective sticker 66 form an optoelectronic speed sensor. A photosensitive element is installed in the measuring instrument 67. When the driven shaft 65 rotates to the position of the reflective sticker 66, the reflectivity increases, and the reflected light will be projected onto the photosensitive element through a lens. The optoelectronic speed sensor can emit a pulse signal. When the reflected light leaves the position of the reflective sticker 66 as the driven shaft 65 rotates, no pulse signal will be emitted. The rotation speed of the driven shaft 65 is judged by receiving the pulse signal, and the rotation speed of the side brush is tested based on this.

[0033] Specifically, the limiting component 8 includes an electric push rod 81. The electric push rod 81 is bolted to the top of the middle receiving table 7. The telescopic end of the electric push rod 81 is fixedly connected to the limiting frame 801. A rubber layer is provided on the surface of the contact area between the limiting frame 801 and the bearing sleeve to improve the sealing performance of the contact with the bearing sleeve. A temperature sensor is provided inside the limiting frame 801, and the temperature sensor is electrically connected to the controller 2. An arc-shaped chute 82 is embedded in the inner side wall of the limiting frame 801. A driving rope 83 is slidably connected in the arc-shaped chute 82. The driving rope 83 and the elastic rope 84 are respectively fixedly connected to both ends of the sliding rod 85. The other end of the elastic rope 84 away from the sliding rod 85 is fixedly connected to the side wall of the arc-shaped chute 82. The sliding rod 85 is slidably matched with the arc-shaped chute 82. A delivery pipe 87 is embedded in the side wall of the limiting frame 801. The delivery pipe 87 is fixedly connected to the telescopic hose 86 through the opening at its end. The other end of the telescopic hose 86 communicates with the inner cavity of the limiting frame 801. The bottom of the telescopic hose 86 is fixedly connected to the sliding rod 85. A driving wheel 871 is rotatably connected in the delivery pipe 87. The center of the driving wheel 871 is fixedly connected to an incomplete gear 872. The incomplete gear 872 meshes with a driven gear 873. The driven gear 873 is rotatably connected to the side wall of the delivery pipe 87 through a torsion spring. The driven gear 873 is fixedly connected to a winding drum 874. The driving rope 83 is wound on the winding drum 874. The driving rope 83 slides through the inner side wall of the limiting frame 801 and enters the arc-shaped chute 82; during operation, the two groups of delivery pipes 87 at the left and right ends are respectively connected to the air inlet pipe and the air outlet pipe. The delivery pipe 87 at the left end is used to deliver air containing test impurities into the limiting frame 801, and the delivery pipe 87 at the right end is used to suck the air inside the limiting frame 801; the air transported from the outside is delivered into the limiting frame 801 through the delivery pipe 87 at the left end, and the impurities contained in the air are made to contact the connecting shaft of the side brush. The air may contain impurities such as oil stains, moisture or stones, and the sealing effects of the upper and lower gaskets inside the bearing on different impurities can be tested simultaneously; in addition, air at different temperatures can be delivered into the limiting frame 801 to test the starting torque and running torque of the rolling bearing under different ambient temperature conditions. According to the torque behavior of the bearing and combined with the temperature change, the lubrication state of the bearing and the shear state of the grease are analyzed; the air simultaneously drives the driving wheel 871 to rotate, the driving wheel 871 drives the incomplete gear 872 to rotate, the incomplete gear 872 drives the driven gear 873 to rotate, the driven gear 873 drives the winding drum 874 to rotate, the winding drum 874 winds and pulls the driving rope 83, the driving rope 83 drives the sliding rod 85 to slide up and down, and the sliding rod 85 drives the telescopic hose 86 to swing at multiple angles, so that the impurities contained in the air delivered by the telescopic hose 86 can contact and impact the connecting shaft of the side brush at multiple angles; then the air is discharged to the outside through the delivery pipe 87 at the right end. After the test is completed, the limiting component 8 is controlled to release the restriction on the bearing sleeve, and the bearing sleeve is removed and transferred to an external inspection agency for inspection.

[0034] Specifically, the contact component 11 includes a belt conveyor main body 111. The outer shell of the belt conveyor main body 111 is fixedly connected to the linear driver 10. Multiple contact surfaces 113 are provided on the surface of the belt 112 of the belt conveyor main body 111, and the frictions between the multiple contact surfaces 113 are different.

[0035] Specifically, the contact surface 113 can be specifically: silicone / rubber pad, felt / short plush cloth, sandpaper / grinding plate, long plush cloth / flocked board, composite material layer, etc.; silicone / rubber pad; simulating hard floor, ceramic tile; felt / short plush cloth; simulating short-haired carpet; sandpaper / grinding plate; high-friction test (such as side brush wear limit test); long plush cloth / flocked board; simulating long-haired carpet or complex ground; composite material layer; multi-scene simulation (such as hard floor + carpet hybrid test).

[0036] Specifically, during the test, the side brush of the sweeper and the connecting shaft of the side brush are connected to the upper and lower groups of bearings. The connecting shaft of the side brush and the bearing passes through the through hole 9 and is fixedly connected to the inner ring of the upper bearing. The bottom of the side brush contacts the contact surface 113 on the belt 112; the two bearing sleeves equipped with bearings are respectively placed at the upper and lower ends of the limiting frame 801, and the electric push rods 81 at the left and right ends are controlled to drive the limiting frame 801 to move, so that the two limiting frames 801 wrap the upper and lower bearing sleeves, and the two limiting frames 801 are in contact with each other and are in a closed state; then the hydraulic cylinder 3 is driven to drive the lifting platform 4 and the driving motor 5 to move downward, so that the driven shaft 65 is inserted into the bearing, and the adsorption magnetic ring 68 is turned on, so that the adsorption magnetic ring 68 generates adsorption with the inner ring of the bearing. The driving motor 5 is turned on to drive the driving shaft 62 to rotate. The driving shaft 62 drives the driven shaft 65 to rotate through the coupling 63 and the torque sensor 64. The driven shaft 65 drives the inner ring of the bearing to rotate; the inner ring of the bearing drives the side brush to rotate, so that the side brush contacts the contact surface 113 on the belt 112. The belt conveyor main body 111 is pushed reciprocally by the linear driver 10, so that the contact surface 113 moves reciprocally while the side brush rotates, simulating the working scenario of the sweeper moving on the actual ground; at the same time, the belt conveyor main body 111 can be controlled to drive the belt 112 to rotate, and the belt 112 drives the contact surface 113 to move, so that different contact surfaces 113 are continuously contacted and replaced with the side brush, and the influence of the friction generated when the side brush contacts different contact surfaces 113 on the bearing is tested.

[0037] The above shows and describes the basic principles, main features and advantages of the present invention. The standard parts used in the present invention can all be purchased from the market. The special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, welding, etc. that are mature in the prior art. The machines, parts and equipment all adopt conventional models in the prior art. Coupled with the circuit connection adopting the conventional connection method in the prior art, it will not be elaborated here.

[0038] The foregoing description of the disclosed embodiments enables those skilled in the art to practice or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A life limit load test bench for a bearing sleeve of a floor sweeper, comprising a test base, a controller is provided on the test base, a hydraulic cylinder for driving a lifting table to adjust the Y-axis position is fixedly connected inside the test base, and a driving motor is fixedly connected to the lifting table; it is characterized in that: The side wall of the test base is fixedly connected with a middle receiving platform, and a through hole is embedded in the middle of the middle receiving platform; the bottom of the test base is fixedly connected with a linear driver, and the moving end of the linear driver is fixedly connected with the contact component and drives the contact component to be slidably connected with the bottom of the test base; the contact component includes a belt conveyor main body, the shell of the belt conveyor main body is fixedly connected with the linear driver, and multiple contact surfaces are arranged on the surface of the belt of the belt conveyor main body, and the frictions between the multiple contact surfaces are different; the belt is convenient for single friction test or continuous friction change test of the bearing to change the circumferential force applied to the connecting shaft; at the left and right ends of the top of the middle receiving platform, a limiting component is fixedly connected, and the limiting component includes an electric push rod, the electric push rod is bolted to the top of the middle receiving platform, the telescopic end of the electric push rod is fixedly connected with a limiting frame, and an arc-shaped chute is embedded in the inner side wall of the limiting frame; a driving rope is slidably connected in the arc-shaped chute, the driving rope and the elastic rope are respectively fixedly connected with both ends of the sliding rod, the other end of the elastic rope far away from the sliding rod is fixedly connected with the side wall of the arc-shaped chute, and the sliding rod is slidably matched with the arc-shaped chute; a conveying pipe is embedded in the side wall of the limiting frame, the conveying pipe is fixedly connected with a telescopic hose through the opening at its end, the other end of the telescopic hose is communicated with the inner cavity of the limiting frame, and the bottom of the telescopic hose is fixedly connected with the sliding rod; a driving wheel is rotatably connected in the conveying pipe, the center of the driving wheel is fixedly connected with an incomplete gear, the incomplete gear is meshed with a driven gear, and the driven gear is rotatably connected with the side wall of the conveying pipe through a torsion spring; the driven gear is fixedly connected with a winding drum, and a driving rope is wound on the winding drum, and the driving rope slides through the inner side wall of the limiting frame and enters the arc-shaped chute; the conveying pipe is used for conveying air containing oil stains, moisture or stones; the air simultaneously drives the driving wheel to rotate, the driving wheel drives the incomplete gear to rotate, the incomplete gear drives the driven gear to rotate, the driven gear drives the winding drum to rotate, the winding drum winds and pulls the driving rope, the driving rope drives the sliding rod to slide up and down, and the sliding rod drives the telescopic hose to swing at multiple angles, so that the air conveyed by the telescopic hose contains stones and can contact and impact the connecting shaft of the side brush at multiple angles, generating an axial impact force on the connecting shaft.

2. The life limit load test bench for the bearing sleeve of a floor sweeper according to claim 1, wherein: The bottom of the lifting platform is fixedly connected with a test component, and the test component includes a test shell, the test shell is fixedly connected with the bottom of the lifting platform, and the output shaft of the driving motor drives the driving shaft to be rotatably connected with the inner side wall of the test shell, and the driving shaft is connected with the torque sensor through a coupling.

3. The life limit load test bench for the bearing sleeve of a floor sweeper according to claim 2, characterized in that: The torque sensor drives the driven shaft to be rotatably connected with the other end of the test shell far away from the driving motor through another coupling, a reflective sticker is connected to the driven shaft, a measuring instrument is bolted in the test shell, and an adsorption magnetic ring is fixedly connected to the side wall of the other end of the driven shaft far away from the torque sensor.

4. A test method for the life limit load test bench of a floor sweeper bearing sleeve, using a life limit load test bench for a floor sweeper bearing sleeve as described in claim 3, characterized in that, It includes the following steps: S1: When conducting the test, connect the side brush of the sweeper and the connecting shaft of the side brush with the bearing, and the connecting shaft of the side brush and the bearing passes through the through hole and is fixedly connected to the inner ring of the upper bearing, and the bottom of the side brush contacts the contact surface on the belt; then place the two bearing sleeves equipped with bearings at the upper and lower ends of the limiting frame respectively, and control the electric push rods at the left and right ends to drive the limiting frame to move, so that the two limiting frames wrap the bearing sleeves at the upper and lower ends, and make the two limiting frames squeeze and contact each other to be in a closed state; S2: Then drive the hydraulic cylinder to drive the lifting platform and the drive motor to move downward, so that the driven shaft is inserted into the bearing, and turn on the adsorption magnetic ring to generate adsorption between the adsorption magnetic ring and the inner ring of the bearing, turn on the drive motor to drive the drive shaft to rotate, and the drive shaft drives the driven shaft to rotate through the coupling and the torque sensor, and the driven shaft drives the inner ring of the bearing to rotate; S3: The inner ring of the bearing drives the side brush to rotate, so that the side brush contacts the contact surface on the belt, and the belt conveyor main body is pushed to reciprocate by the linear actuator, so that the contact surface reciprocates while the side brush rotates, simulating the working scenario of the sweeper moving on the actual ground.

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