Sweeper bearing sleeve service life limit load test bench and test method thereof

Abstract

The invention discloses a sweeper bearing sleeve service life limit load test bench and a test method thereof, and relates to the technical field of sweeper accessory testing, the sweeper bearing sleeve service life limit load test bench comprises a test seat, a controller is arranged on the test seat, a hydraulic cylinder used for driving a lifting platform to adjust the Y-axis position is fixedly connected in the test seat, and a driving motor is fixedly connected to the lifting platform; the side wall of the test seat is fixedly connected with a middle bearing table, and a through hole is embedded in the middle end of the middle bearing table; a linear driver is fixedly connected to the bottom of the testing seat, bearing abrasion is accelerated through limit loads, the fatigue failure threshold value of a bearing sleeve is accurately judged by combining sudden change points of torque and rotating speed data, and the bottleneck that a traditional bearing testing table is single in function and limited in environment simulation is broken through through the accurate sensing technology and intelligent control. An efficient and reliable test platform is provided for service life prediction, failure analysis and product iteration of the bearing sleeve of the sweeper, and the research and development efficiency and the product quality control level are remarkably improved.

Description

Technical Field

[0001] The invention relates to the technical field of sweeper accessory testing, and in particular to a sweeper bearing sleeve life limit load test bench and a test method thereof. Background Art

[0002] When testing the sweeper bearings and bearing sleeves 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. However, due to the bottleneck of the single function and limited environmental simulation of the test bench, the bearings cannot be tested well. Summary of the invention

[0003] Therefore, in order to solve the above-mentioned deficiencies, the present invention provides a sweeper bearing sleeve life limit load test bench and a test method thereof.

[0004] The present invention is achieved by constructing a life limit load test bench for a bearing sleeve of a sweeping machine and a test method thereof, the device comprising a test seat, a controller being provided on the test seat, a hydraulic cylinder for driving a lifting platform to adjust the Y-axis position being fixedly connected inside the test seat, and a driving motor being fixedly connected to the lifting platform; a middle receiving platform being fixedly connected to the side wall of the test seat, and a through hole being embedded in the middle end of the middle receiving platform; a linear drive being fixedly connected to the bottom of the test seat, a moving end of the linear drive being fixedly connected to a contact assembly and driving the contact assembly to slide with the bottom of the test seat; the contact assembly comprising a belt conveyor body, an outer shell of the belt conveyor body being fixedly connected to the linear drive, a plurality of contact surfaces being provided on the belt surface of the belt conveyor body, and the friction forces between the plurality of contact surfaces being different, and the belt can facilitate a single friction force test or a continuous friction force change test on the bearing.

[0005] In a feasible implementation, a test assembly is fixedly connected to the bottom of the lifting platform, and the test assembly includes a test shell, which is fixedly connected to the bottom of the lifting platform. The output shaft of the driving motor drives the driving shaft to rotate with the inner wall of the test shell, and the driving shaft is connected to the torque sensor through a coupling.

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

[0007] In a feasible embodiment, a limiting component is fixedly connected to the left and right ends of the top of the middle receiving platform, and the limiting component includes an electric push rod, which is bolted to the top of the middle receiving platform, and the telescopic end of the electric push rod is fixedly connected to the limiting frame, and an arc-shaped slide groove is embedded in the inner wall of the limiting frame.

[0008] In a feasible embodiment, a driving rope is slidably connected in the arc-shaped slide groove, and the driving rope and the elastic rope are respectively fixedly connected to the two ends of the sliding rod, and the other end of the elastic rope away from the sliding rod is fixedly connected to the side wall of the arc-shaped slide groove, and the sliding rod and the arc-shaped slide groove are slidably matched.

[0009] In a feasible embodiment, a delivery pipe is embedded in the side wall of the limiting frame, and the delivery pipe is fixedly connected to the telescopic hose through the opening at its end. The other end of the telescopic hose is connected to 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 delivery pipe, the center of the driving wheel is fixedly connected to an incomplete gear, the incomplete gear is meshed with a driven gear, and the driven gear is rotatably connected to the side wall of the delivery pipe through a torsion spring.

[0011] In a feasible implementation manner, the driven gear is fixedly connected to the reel, a driving rope is reeled on the reel, and the driving rope slides through the inner wall of the limiting frame and enters the arc-shaped sliding groove.

[0012] A testing method for a life limit load test bench for a sweeping machine bearing sleeve comprises the following steps: S1: When testing, the side brush of the sweeper and the connecting shaft of the side brush are connected to the bearing, and the connecting shaft of the side brush and the bearing is passed through the through hole and fixedly connected to the inner ring of the bearing above, and the bottom of the side brush contacts the contact surface on the belt; then two sets of bearing sleeves equipped with bearings are placed at the upper and lower ends of the limiting frame respectively, and the electric push rods at the left and right ends are controlled to drive the limiting frame to move, so that the two sets of limiting frames wrap the bearing sleeves at the upper and lower ends, so that the two sets of limiting frames are squeezed and contacted with each other to form a closed state; 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 the adsorption magnetic ring is turned on to make the adsorption magnetic ring adsorb to the inner ring of the bearing, and 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; 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. The linear drive pushes the belt conveyor body to move back and forth, so that the contact surface moves back and forth while the side brush rotates, simulating the working scene of the sweeper moving on the actual ground.

[0013] The present invention has the following advantages: The present invention provides a sweeper bearing sleeve life limit load test bench and a test method thereof through improvement, which has the following improvements compared with similar equipment: The present invention discloses a life limit load test bench for the bearing sleeve of a sweeping machine and a test method thereof, which use different materials such as silicone pads, felt, sandpaper, etc. to accurately simulate the friction characteristics of hard floors, carpets, tiles, etc., and superimpose two-way motion: the composite motion of the side brush rotation and the reciprocating / continuous movement of the belt, which truly restores the dynamic friction load of the sweeping machine when it is moving; the belt conveyor can cyclically switch between different contact surfaces to achieve continuous testing of multiple working conditions without manual intervention; the belt can facilitate single friction force testing or continuous friction force conversion testing of the bearing.

[0014] The present invention describes a life limit load test bench for the bearing sleeve of a sweeping machine and a test method thereof. Air containing impurities such as oil stains, moisture, sand and gravel is injected into a limiting frame through a delivery pipe to simulate the risk of seal failure of the sweeping machine in a polluted environment. The telescopic hose is swung at multiple angles to allow 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 the temperature rise inside the bearing sleeve is monitored in combination with a temperature sensor to evaluate the shear stability of the grease at different temperatures and the change in the bearing starting torque.

[0015] The present invention discloses a life limit load test bench for the bearing sleeve of a sweeping machine and a test method thereof. The test bench accelerates the bearing wear through the limit load (such as high-friction sandpaper contact surface + impurity impact + high temperature environment) and combines the mutation points of the torque and speed data to accurately determine the fatigue failure threshold of the bearing sleeve. The test bench breaks through the bottleneck of the single function and limited environmental simulation of the traditional bearing test bench through precise sensing technology and intelligent control, and provides an efficient and reliable test platform for the life prediction, failure analysis and product iteration of the bearing sleeve of the sweeping machine, which significantly improves the R&D efficiency and product quality control level. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The structure of the present invention is schematically shown in FIG. Figure 1 ; Figure 2 The structure of the present invention is schematically shown in FIG. Figure 2 ; Figure 3 The structure of the present invention is schematically shown in FIG. Figure 3 ; Figure 4 The structure of the present invention is schematically shown in FIG. Figure 4 ; Figure 5 It is a schematic diagram of the test assembly structure of the present invention; Figure 6 This is a schematic diagram of the limiting component structure of the present invention. Figure 1 ; Figure 7 This is a schematic diagram of the limiting component structure of the present invention. Figure 2 .

[0017] Among them: test seat-1, controller-2, hydraulic cylinder-3, lifting platform-4, drive motor-5, test component-6, middle receiving platform-7, limit component-8, through hole-9, linear drive-10, contact component-11, test shell-61, drive shaft-62, coupling-63, torque sensor-64, driven shaft-65, reflective sticker-66, measuring instrument-67, adsorption magnetic ring-68, electric push rod-81, limit frame-801, arc slide groove-82, drive rope-83, elastic rope-84, sliding rod-85, telescopic hose-86, conveying pipe-87, drive wheel-871, incomplete gear-872, driven gear-873, reel-874, belt conveyor body-111, belt-112, contact surface-113. DETAILED DESCRIPTION

[0018] The following will be combined with the attached Figure 1-Figure 7 The present invention is described in detail, and the technical solutions in the embodiments of the present invention are made clear. The complete description is obvious. The described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figures 1 to 7 A sweeper bearing sleeve life limit load test bench and a test method thereof of the present invention include a test seat 1, a controller 2 is provided on the test seat 1, a hydraulic cylinder 3 for driving a lifting platform 4 to adjust the Y-axis position is fixedly connected inside the test seat 1, the telescopic end of the hydraulic cylinder 3 is fixedly connected to the lifting platform 4, a driving motor 5 is fixedly connected to the lifting platform 4, and a test assembly 6 is fixedly connected to the bottom of the lifting platform 4; the controller 2 is electrically connected to the hydraulic cylinder 3, the driving motor 5, the linear driver 10, the torque sensor 64, the measuring instrument 67, the adsorption magnetic ring 68, the electric push rod 81, and the belt conveyor body 111; the data detected by the torque sensor 64 and the measuring instrument 67 can be transmitted to the controller 2.

[0020] Specifically, a middle receiving platform 7 is fixedly connected to the side wall of the test seat 1 , and limiting components 8 are fixedly connected to the left and right ends of the top of the middle receiving platform 7 , and a through hole 9 is embedded in the middle end of the middle receiving platform 7 .

[0021] Specifically, a linear actuator 10 is fixedly connected to the bottom of the test seat 1 , and a moving end of the linear actuator 10 is fixedly connected to the contact assembly 11 and drives the contact assembly 11 to be slidably connected to the bottom of the test seat 1 .

[0022] Specifically, the test assembly 6 includes a test shell 61, the test shell 61 is fixedly connected to the bottom of the lifting platform 4, the output shaft of the drive motor 5 drives the drive shaft 62 to rotate and connect with the inner wall of the test shell 61, the output shaft of the drive motor 5 is fixedly connected to the drive shaft 62, the drive 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 rotate and connect with the other end of the test shell 61 away from the drive motor 5 through another set of couplings 63, the driven shaft 65 is connected with a reflective sticker 66, and the test shell 61 is bolted with a measuring Measuring instrument 67, the side wall of the other end of the driven shaft 65 away from the torque sensor 64 is fixedly connected with an adsorption magnetic ring 68; the measuring instrument 67 and the reflective sticker 66 form a photoelectric speed sensor, and the measuring instrument 67 is equipped with a photosensitive element. 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 the lens, and the photoelectric speed sensor can send out a pulse signal. When the reflected light leaves the position of the reflective sticker 66 with the driven shaft 65, no pulse signal is sent. The speed of the driven shaft 65 is judged by receiving the pulse signal, and the speed of the side brush is tested thereby.

[0023] Specifically, the limiting component 8 includes an electric push rod 81, which is bolted to the top of the middle receiving platform 7, and the telescopic end of the electric push rod 81 is fixedly connected to the limiting frame 801. The surface of the contact area between the limiting frame 801 and the bearing sleeve is provided with a rubber layer to improve the sealing performance of the contact with the bearing sleeve. A temperature sensor is provided in the limiting frame 801, and the temperature sensor is electrically connected to the controller 2. An arc-shaped slide groove 82 is embedded in the inner wall of the limiting frame 801, and a driving rope 83 is slidably connected in the arc-shaped slide groove 82. The driving rope 83 and the elastic rope 84 are respectively fixedly connected to the two ends of the sliding rod 85, and 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 slide groove 82. The sliding rod 85 slidably cooperates with the arc-shaped slide groove 82, and the limiting frame A conveying tube 87 is embedded in the side wall of 801. The conveying tube 87 is fixedly connected to the telescopic hose 86 through the opening at its end. The other end of the telescopic hose 86 is connected to 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 conveying tube 87. The center of the driving wheel 871 is fixedly connected to the incomplete gear 872. The incomplete gear 872 is meshed with the driven gear 873. The driven gear 873 is rotatably connected to the side wall of the conveying tube 87 through a torsion spring. The driven gear 873 is fixedly connected to the winding drum 874. The driving rope 83 is wound on the winding drum 874. The driving rope 83 slides through the inner wall of the limiting frame 801 and enters the arc-shaped slide groove 82. When working, the two groups of left and right ends are The delivery pipe 87 is connected to the air inlet pipe and the air outlet pipe respectively. 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 in the limiting frame 801; the air delivered from the outside is delivered to the limiting frame 801 through the delivery pipe 87 at the left end, and the impurities contained in the air are brought into contact with the connecting shaft of the side brush. The air may contain impurities such as oil stains, moisture or stones, and the sealing effect of the upper and lower sealing gaskets in the bearing on different impurities can be tested at the same time; in addition, air of 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, and the lubrication state of the bearing can be analyzed according to the torque behavior of the bearing and combined with the temperature change. and the shear state of the grease; 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 up and pulls the driving rope 83, the driving rope 83 drives the sliding rod 85 to slide up and down, 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 collide with 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 control limiting component 8 releases the restriction on the bearing sleeve, removes the bearing sleeve, and transfers it to the external detection mechanism for detection.

[0024] Specifically, the contact assembly 11 includes a belt conveyor body 111, the outer shell of the belt conveyor body 111 is fixedly connected to the linear drive 10, and the surface of the belt 112 on the belt conveyor body 111 is provided with multiple groups of contact surfaces 113, and the friction forces between the multiple groups of contact surfaces 113 are not the same.

[0025] Specifically, the contact surface 113 can be: silicone / rubber pad, felt / short-pile cloth, sandpaper / sandblasting board, plush cloth / flocking board, composite material layer, etc.; silicone / rubber pad; simulated hard floor, ceramic tile; felt / short-pile cloth; simulated short-pile carpet; sandpaper / sandblasting board; high friction test (such as side brush wear limit test); plush cloth / flocking board; simulated long-pile carpet or complex ground; composite material layer; multi-scenario simulation (such as hard floor + carpet mixed test).

[0026] Specifically, during the test, the side brushes and the connecting shafts of the side brushes of the sweeper are connected to the upper and lower groups of bearings, and the connecting shafts of the side brushes and the bearings are passed through the through hole 9 and fixedly connected to the upper inner ring of the bearing, and the bottom of the side brush contacts the contact surface 113 on the belt 112; the two groups of 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 groups of limiting frames 801 wrap the bearing sleeves at the upper and lower ends, so that the two groups of limiting frames 801 are squeezed and contacted with each other 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 to make the adsorption magnetic ring 68 adsorbed with the inner ring of the bearing. Turn on the drive motor 5 to drive the drive shaft 62 to rotate. The drive 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 body 111 is pushed back and forth by the linear drive 10, so that the contact surface 113 reciprocates while the side brush rotates, simulating the working scene of the sweeper moving on the actual ground. At the same time, the belt conveyor 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 constantly in contact 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.

[0027] The above shows and describes the basic principle, main features and advantages of the present invention, and the standard parts used in the present invention can be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt the conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt the conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

[0028] 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 sweeping machine bearing sleeve, comprising a test seat, a controller is provided on the test seat, a hydraulic cylinder for driving a lifting platform to adjust the Y-axis position is fixedly connected inside the test seat, and a driving motor is fixedly connected to the lifting platform; the characteristics are: A middle receiving platform is fixedly connected to the side wall of the test seat, and a through hole is embedded in the middle end of the middle receiving platform; a linear drive is fixedly connected to the bottom of the test seat, and the moving end of the linear drive is fixedly connected to the contact component and drives the contact component to slide and connect with the bottom of the test seat; the contact component includes a belt conveyor body, and the outer shell of the belt conveyor body is fixedly connected to the linear drive, and the belt surface of the belt conveyor body is provided with multiple groups of contact surfaces, and the friction between the multiple groups of contact surfaces is not the same; the belt facilitates single friction test or continuous friction change test of the bearing.

2. According to claim 1, a sweeper bearing sleeve life limit load test bench, characterized in that: A test assembly is fixedly connected to the bottom of the lifting platform, and the test assembly includes a test shell. The test shell is fixedly connected to the bottom of the lifting platform, and the output shaft of the driving motor drives the driving shaft to be rotatably connected to the inner wall of the test shell. The driving shaft is connected to the torque sensor through a coupling.

3. According to claim 2, a sweeper bearing sleeve life limit load test bench, characterized in that: The torque sensor drives the driven shaft to rotate and connect with the other end of the test shell away from the driving motor through another set of couplings. A reflective sticker is connected to the driven shaft. A measuring instrument is bolted inside the test shell. An adsorption magnetic ring is fixedly connected to the side wall of the other end of the driven shaft away from the torque sensor.

4. According to claim 3, a sweeper bearing sleeve life limit load test bench is characterized in that: The left and right ends of the top of the middle receiving platform are fixedly connected with limiting components, which include an electric push rod, which is bolted to the top of the middle receiving platform, and the telescopic end of the electric push rod is fixedly connected to the limiting frame, and an arc-shaped slide groove is embedded in the inner wall of the limiting frame.

5. According to claim 4, a life limit load test bench for a sweeping machine bearing sleeve, characterized in that: A driving rope is slidably connected in the arc-shaped slide groove. The driving rope and the elastic rope are fixedly connected to the two ends of the sliding rod respectively. The other end of the elastic rope away from the sliding rod is fixedly connected to the side wall of the arc-shaped slide groove. The sliding rod and the arc-shaped slide groove are slidably matched.

6. A sweeper bearing sleeve life limit load test bench according to claim 5, characterized in that: A delivery pipe is embedded in the side wall of the limiting frame. The delivery pipe is fixedly connected to the 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. The bottom of the telescopic hose is fixedly connected to the sliding rod.

7. A sweeper bearing sleeve life limit load test bench according to claim 6, characterized in that: A driving wheel is rotatably connected in the conveying pipe, the center of the driving wheel is fixedly connected to an incomplete gear, the incomplete gear is meshed with a driven gear, and the driven gear is rotatably connected to the side wall of the conveying pipe through a torsion spring.

8. The life limit load test bench for the bearing sleeve of a sweeping machine according to claim 7, characterized in that: The driven gear is fixedly connected to the reel, a driving rope is reeled on the reel, and the driving rope slides through the inner wall of the limiting frame and enters the arc-shaped sliding groove.

9. A method for testing a life limit load test bench for a sweeping machine bearing sleeve, using the life limit load test bench for a sweeping machine bearing sleeve as claimed in claim 8, characterized in that: The steps include: S1: When testing, the side brush of the sweeper and the connecting shaft of the side brush are connected to the bearing, and the connecting shaft of the side brush and the bearing is passed through the through hole and fixedly connected to the inner ring of the bearing above, and the bottom of the side brush contacts the contact surface on the belt; then two sets of bearing sleeves equipped with bearings are placed at the upper and lower ends of the limiting frame respectively, and the electric push rods at the left and right ends are controlled to drive the limiting frame to move, so that the two sets of limiting frames wrap the bearing sleeves at the upper and lower ends, so that the two sets of limiting frames are squeezed and contacted with each other to form a closed state; 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 the adsorption magnetic ring is turned on to make the adsorption magnetic ring adsorb to the inner ring of the bearing, and 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; 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. The linear drive pushes the belt conveyor body to move back and forth, so that the contact surface moves back and forth while the side brush rotates, simulating the working scene of the sweeper moving on the actual ground.

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