Bearing running strength detection device and detection method

Abstract

The present invention relates to the field of detection technology, and specifically to a bearing operation strength detection device and detection method. The bearing operation strength detection device comprises: a detection mounting frame is slidably placed on the detection platform. A sliding drive structure is installed on the detection platform and connected to the detection mounting frame, and is used to drive the detection mounting frame to slide. A lifting support frame is arranged on the detection mounting frame in a liftable manner, and is used for the installation of the detection frame. A lifting drive member is installed on the detection mounting frame, and its output end is connected to the lifting support frame, and is used to drive the lifting support frame to lift and apply detection pressure. The detection frame is installed below the lifting support frame and is used for the installation of the support member. A pressure sensing unit is provided between the detection frame and the lifting support frame, and the pressure sensing unit is used to sense the pressure borne by the bearing during the detection process. The present invention can determine whether the radial pressure bearing capacity of the bearing is qualified, has a strong evaluation ability, and is consistent with the use power structure of the bearing.

Description

Technical Field

[0001] The present invention relates to the field of detection technology, and in particular to a bearing operation strength detection device and a detection method. Background Art

[0002] Bearings are an important component in mechanical engineering, mainly used to support and limit rotational torque or motion friction. Its main function is to reduce friction loss, reduce wear, and protect machine parts from damage. There are many types of bearings, which can be divided into many types according to working environment, working principle, material and other factors. Common bearings include ball bearings, deep groove ball bearings, cylindrical roller bearings, self-aligning ball bearings, angular contact ball bearings, thrust ball bearings, needle roller bearings, etc. The main structure of the bearing includes inner ring, outer ring, rolling element, cage and sealing ring. Among them, the rolling element is responsible for bearing and dispersing radial and axial loads; the cage keeps the rolling element on the predetermined track during operation; the sealing ring is used to prevent the leakage of lubricating media and the intrusion of pollutants. The working principle of the bearing is mainly to reduce friction loss by rolling the rolling element. During the rolling process, due to the cooperation between the inner ring and the outer ring, the rolling element will constantly change the trajectory of motion, so that it is always in the best state, thereby achieving the purpose of reducing friction loss. The use of bearings is wide, covering various types of machinery and equipment, such as automobiles, motorcycles, trains, ships, airplanes, machine tools, motors, household appliances, etc.

[0003] The detection of bearing strength refers to the testing of the mechanical properties of the bearing to evaluate its key indicators such as load-bearing capacity, stiffness, and durability to ensure its reliability and safety during use. The following are several commonly used bearing strength detection methods: Tensile and compression test: By applying a certain axial load to the bearing, its ability to resist damage is measured. This method can evaluate the bearing's ability to resist fatigue and tension. Bending test: By loading the maximum bending stress to the bearing, its bending deformation and fatigue life are checked. Impact test: Simulate the impact load that may occur in actual applications to check the impact resistance of the bearing. High temperature experiment: Simulate the high temperature conditions that the bearing may encounter during actual use to check its thermal stability and oxidation resistance. All of the above test methods can evaluate the strength of the bearing from different angles, but the specific test steps and methods will vary depending on the type of bearing and the use environment. At the same time, in order to ensure the accuracy of the test results, it is also necessary to select appropriate test equipment and environment.

[0004] Most existing detection devices detect the axial pressure of the bearing and cannot evaluate the radial pressure resistance. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a bearing operation strength detection device for detecting the operating state of the bearing, especially the radial extrusion bearing force of the bearing during operation. The bearing operation strength detection device comprises:

[0006] The test bench forms a support and installation structure. The test bench may include a support table and support legs. The support legs may be fixedly installed at the four corners of the bottom of the support table. The upper surface of the support table forms a horizontal effective test support surface. The bearing may roll on the support table. The support table may be a rectangular structure. The bottom of the support leg may be installed with a support gasket. The support gasket is provided with a mounting hole. The mounting bolt may pass through the mounting hole to fix the test bench to the bearing production line, thereby facilitating the support and fixation of the test bench.

[0007] A detection mounting frame is slidably placed on the detection table, and the detection mounting frame is used to form a detection bracket. The detection mounting frame can be an inverted concave gantry structure. The two ends of the bottom of the detection mounting frame are slidably connected to the detection table and are located on both sides of the support table. The detection mounting frame can slide on the detection table and slide stably without causing vibration due to the sliding of the detection mounting frame. Specifically, through grooves can be opened on both sides of the detection table, and the bottoms of the two ends of the detection mounting frame are slidably placed inside the through grooves and pass through the through grooves.

[0008] The sliding drive structure is installed on the detection platform and connected to the detection mounting frame, and is used to drive the detection mounting frame to slide. The sliding direction of the detection mounting frame is perpendicular to the plane where the detection mounting frame is located.

[0009] The lifting support frame can be lifted and arranged on the detection mounting frame for installation of the detection frame. The lifting support frame can be a horizontally arranged lever structure or a square steel pipe structure with a certain rigidity to avoid deformation and damage due to force during the detection process.

[0010] The lifting drive component is installed on the detection mounting frame, and its output end is connected to the lifting support frame, which is used to drive the lifting support frame to lift and apply detection pressure. The lifting drive component can be a hydraulic cylinder, an electric telescopic rod or other structures, and the height and output pressure of the lifting support frame can be controlled by controlling its output. The detection frame is installed under the lifting support frame and is used to install the bearing. A pressure sensing unit is provided between the detection frame and the lifting support frame. The pressure sensing unit is used to sense the pressure on the bearing during the detection process. The specific connection method is the existing technology and will not be described here.

[0011] The controller can be installed on the detection table and electrically connected to the sliding drive structure, the lifting drive member, and the pressure sensing unit. The controller is used to control the output of the sliding drive structure to control the moving position of the detection mounting frame. The controller is used to control the output of the lifting drive member to control the height of the detection frame and the output detection pressure. The controller is used to obtain the detection pressure through the pressure sensing unit. When the bearing is detected, the detection mounting frame and the lifting support frame are in the initial detection position. The bearing is nested on the support arc piece of the support member, and then the support member is rotated to embed its end into the interior of the fixing buckle for buckling. The inclined surface of the extrusion block squeezes the inclined surface block, and the inclined surface block squeezes the connecting rod to make the truncated table move axially inside the connecting rod. Since the supporting arc piece cannot slide axially on the connecting rod, the sliding rod is pushed outward by the movement of the truncated table, so that the supporting arc piece slides radially outward to complete the expansion, filling the inner ring of the bearing, thereby completing the fixing of the bearing. The controller starts the lifting drive to drive the lifting support frame to descend, and makes the bottom of the bearing contact with the upper surface of the support table. When the pressure sensing unit senses a pressure of F0, it records it. The F0 is the installation pressure of the detection frame, which can be obtained according to the equipment parameters, that is, the pressure sensed by the pressure sensing unit when no detection is performed. The controller controls the sliding drive structure to drive the detection mounting frame to slide smoothly at a preset speed v, and controls the lifting drive to increase the detection pressure of the bearing at a preset pressure increase rate ΔF. The relationship between the output of the lifting drive and the output pressure of the lifting support frame corresponds one to one, which can be obtained through the equipment parameters of the lifting drive, and the details are not repeated here. Then, the real-time detection pressure F of the bearing is sensed by the pressure sensing unit, and then a plane coordinate system is constructed. The horizontal coordinate of the plane coordinate system is the rolling path l, and the vertical coordinate is the real-time detection pressure F-F0 of the bearing. Then, it is calculated to obtain The coordinate points are marked and sorted. The sorting order can be sorted by ascending values ​​of the scroll path l, and then the radial load fluctuation index E of the bearing is calculated, and then it is determined whether the radial load fluctuation index E is greater than a preset standard load fluctuation index E. 标 If yes, it is judged as unqualified, if no, it is judged as qualified.

[0012] Preferably: a sliding structure can be provided on the contact surface between the detection mounting frame and the detection table, and the sliding structure can be a combination structure of a rolling groove and a rolling ball, the rolling groove is opened on the detection table and is located on the contact surface with the detection mounting frame, the direction of the rolling groove is consistent with the sliding direction of the detection mounting frame, and the rolling balls can be provided in multiple groups, each group of rolling balls has at least two rolling balls, and are linearly arranged and nested inside the rolling groove, when the detection mounting frame slides on the detection table, the rolling balls roll inside the rolling groove, so that the detection mounting frame slides smoothly, avoiding unstable detection data caused by unstable sliding, and increasing data readability.

[0013] Preferably: the sliding drive structure can be a combination structure of a motor and a lead screw, in which case the sliding drive structure can be installed at the bottom of the detection platform. Two lead screws are provided and are rotatably connected inside the through groove, and their axial direction is consistent with the sliding direction of the detection mounting frame. The motor is fixedly mounted at the bottom of one end of the detection platform, and the motor is transmission-connected to the lead screw, and the transmission connection can be a belt connection. A nesting hole is provided at the bottom of the detection mounting frame, and a ball is rotatably provided inside the nesting hole, and the ball is nested in the wire groove of the lead screw. The motor can drive the lead screw to rotate, thereby completing the driving of the detection mounting frame. Of course, the sliding drive structure has other structures, and the specific structure will not be repeated here.

[0014] Preferably: the two ends of the lifting support frame can be slidably connected to the detection mounting frame. Specifically, a lifting groove can be opened on the inner side of the detection mounting frame, and the end of the lifting support frame can be slidably nested in the lifting groove, so that the lifting support frame can slide stably and the force can be evenly distributed. In order to prevent the detection frame from being disturbed by the friction of the detection mounting frame during the detection process, resulting in inaccurate detection data. A vertical guide rod can be fixedly installed inside the lifting groove, and linear bearings can be installed at both ends of the lifting support frame. The linear bearings are slidably nested on the guide rods, so that the lifting support frame can slide stably.

[0015] Preferably: the detection frame may include a gantry frame, a support member and a fixing buckle. The gantry frame may be an inverted concave-shaped gantry structure with two bottom support rods. Of course, it may also be an inverted Y-shaped structure. Other situations are not described here. The support member and the fixing buckle are installed on the two bottom support rods. The support member may be a detachable support rod structure, the fixing buckle is on the bottom support rod, and the end of the support member may be connected with the fixing buckle. When the bearing is tested, the bearing can be nested on the support member, and the support member is connected to the fixing buckle to complete the installation of the bearing. Of course, the support member and the fixing buckle can also be other structures.

[0016] Preferably, the support member may include a rotating base, a connecting rod, a supporting arc piece, a bevel block and a bevel block. The rotating base is rotatably connected to the gantry frame, one end of the connecting rod is fixedly connected to the rotating base, the connecting rod is a hollow structure, a plurality of supporting arc pieces are radially slidably connected to the connecting rod, the supporting arc pieces can slide along the radial direction of the connecting rod, and the number of supporting arc pieces can be set as appropriate. The supporting arc piece is located at the periphery of the connecting rod, the connecting rod is axially slidably nested inside the connecting rod, one end of the connecting rod extends out of the non-connecting end of the connecting rod and is fixedly connected to the bevel block, and the bevel of the bevel block faces the direction of the fixed buckle. The connecting rod is fixedly connected to a truncated cone, the truncated cone radially penetrates the connecting rod and can slide axially on the connecting rod, and the truncated cone is located inside the supporting arc piece. A plurality of bevel grooves are provided on the beveled arc surface of the truncated cone, and the number of bevel grooves is consistent with the number of supporting arc pieces, a sliding rod is fixedly connected to the inner arc surface of the supporting arc piece, and the sliding rod is slidably nested inside the bevel groove. When the inclined plane block is squeezed, the connecting rod and the round table slide toward the rotating base. Since the supporting arc piece cannot slide axially on the connecting rod, the sliding rod is pushed outward by the movement of the round table, so that the supporting arc piece slides radially outward to complete the expansion. When the bearing is nested in the supporting arc piece, the bearing can be fixed by expansion. When the bearing is tested, since the connecting rod and the inclined plane block are squeezed, the supporting arc piece will not move radially due to the pressure, ensuring that the bearing is fixed and stable and will not cause detection errors.

[0017] Preferably: the supporting arc piece and the connecting rod can be connected by a sliding member, and the sliding member limits the radial sliding of the supporting arc piece. The sliding member may include a radial groove and a radial rod, the radial rod is fixedly connected to the connecting rod, the side wall of the supporting arc piece is provided with a radial groove, and the radial rod is slidably nested in the radial groove, thereby completing the radial limitation. The inclined plane block can be elastically connected to the non-rotating connection end of the connecting rod, and the corresponding position of the fixing buckle can be provided with a groove or a limiting protrusion, so as to complete the rotation limitation of the support member, which is the prior art and will not be described in detail here. The end of the inclined plane block can be rotatably provided with at least one roller, and the setting of the roller can reduce the friction between the inclined plane block and the fixing buckle, so that the support member rotates smoothly.

[0018] Preferably: the fixing buckle comprises a mounting groove, an extrusion block and a bolt. The fixing buckle corresponds to an mounting groove on the inner side of the gantry frame. An extrusion block is slidably mounted inside the mounting groove. The lower part of the extrusion block is an inclined surface facing the support. When the support rotates, the inclined surface of the inclined surface block cooperates with the inclined surface of the extrusion block for extrusion. A bolt is threadedly embedded on the gantry frame. One end of the bolt is rotatably connected to the extrusion block. The extrusion amount of the extrusion block can be adjusted by rotating the bolt, so that different types of bearings and the tightness of the fixation can be applied.

[0019] Preferably: the pressure increase rate , where FM The radial bearing capacity of the bearing inspection standard can be obtained through the specifications and quality requirements of the bearing. The L is the total length of the bearing's inspection rolling path, which can be understood as the effective length of the support table, the distance from the initial inspection position to the end inspection position, and v is the moving speed of the inspection mounting frame. Then, according to the pressure increase rate ΔF, a preset increase speed-output speed information table is searched to obtain the power output speed V of the lifting drive component, and then the lifting drive component is controlled to output power at the power output speed V until the inspection mounting frame moves to the inspection end position, and then the controller controls the inspection mounting frame and the lifting support frame to return to the initial position. The increase speed-output speed information table can be obtained based on the equipment parameters of the lifting drive component or through experiments.

[0020] Preferably: the radial load fluctuation index of the bearing is , where i is The coordinates of the sequence number, F i is the detection pressure of the coordinate point numbered i, I is The total number of coordinates, i = 1, 2, ..., I. k is the fluctuation evaluation ordinal number, K is the total number of fluctuation evaluations; k = I-K+1, I-K+2, ..., I. is a unit fluctuation parameter, and the unit fluctuation parameter may be the induction fluctuation difference of the pressure sensing unit when the pressure is F, which may be obtained through experiments.

[0021] The present invention also proposes a bearing running strength detection method, comprising the following steps:

[0022] S1. The controller starts the lifting drive to drive the lifting support frame to descend, and makes the bottom of the bearing contact with the upper surface of the support table.

[0023] S2. When the pressure sensing unit senses a pressure of F, it records it.

[0024] S3. The sliding drive structure drives the detection mounting frame to slide smoothly at a preset speed v, and controls the lifting drive member to increase the detection pressure of the bearing at a preset pressure increase speed ΔF until the detection mounting frame moves to the detection end position.

[0025] S4. Obtain the real-time detection pressure F0 of the bearing through the pressure sensing unit.

[0026] S5. Construct a plane coordinate system, wherein the horizontal coordinate of the plane coordinate system is the rolling path l, and the vertical coordinate is the real-time detection pressure FF of the bearing.

[0027] S6. Calculation The coordinate points are marked and sorted.

[0028] S7. Calculate and obtain the radial load fluctuation index E of the bearing.

[0029] S8. Determine whether the radial load fluctuation index E is greater than a preset standard load fluctuation index E. 标 If yes, it is judged as unqualified, if no, it is judged as qualified.

[0030] The technical effects and advantages of the present invention are as follows: the method can be used to determine whether the radial pressure bearing capacity of the bearing is qualified, the evaluation capability is strong, and the method is consistent with the bearing's use dynamic structure. The radial load fluctuation index can be used to evaluate the fluctuation of the bearing during operation, so that its use efficiency can be better evaluated, and the evaluation capability is strong. This method can remove the pressure fluctuation interference of the ball in the bearing during normal operation, and the evaluation is more accurate, avoiding the interference caused by normal fluctuations. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a structural schematic diagram of a bearing operation strength detection device proposed by the present invention.

[0032] Figure 2 This is a schematic diagram of the detection state structure of a bearing operation strength detection device proposed by the present invention.

[0033] Figure 3 This is a right view of the detection state of a bearing operation strength detection device proposed by the present invention.

[0034] Figure 4 for Figure 3 Cross-sectional view of section AA in.

[0035] Figure 5 This is a schematic diagram of the three-dimensional structure of a support member in a bearing operation strength detection device proposed by the present invention.

[0036] Figure 6 This is a schematic diagram of the internal structure of a support member in a bearing operation strength detection device proposed by the present invention.

[0037] Figure 7 This is a schematic diagram of the supporting arc piece and inclined surface structure in a bearing operation strength detection device proposed by the present invention.

[0038] Figure 8 This is a schematic diagram of the fixing buckle structure in a bearing operation strength detection device proposed by the present invention.

[0039] Fig. 9 The present invention is a flowchart of a bearing operation strength detection method.

[0040] Explanation of the reference numerals: detection table 1, detection mounting frame 2, lifting drive member 3, lifting support frame 4, detection frame 5, fixing buckle 6, support member 7, support table surface 8, pressure sensing unit 9, bearing 10, rotating base 11, connecting rod 12, supporting arc piece 13, sliding member 14, inclined block 15, roller 16, inclined clamping block 17, round table 18, inclined groove 19, connecting rod 20, bolt 21, extrusion block 22, mounting groove 23. DETAILED DESCRIPTION

[0041] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses. Example

[0042] refer to Figure 1-Figure 4 In this embodiment, a bearing operation strength detection device is proposed, which is used to detect the operating state of the bearing, especially the radial extrusion bearing force of the bearing during operation. The bearing operation strength detection device includes:

[0043] The test table 1 forms a support and installation structure. The test table 1 may include a support table 8 and support legs. The support legs may be fixedly installed at the four corners of the bottom of the support table 8. The upper surface of the support table 8 forms a horizontal effective test support surface, and the bearing 10 may roll on the support table 8. The support table 8 may be a rectangular structure. A support gasket may be installed at the bottom of the support leg. The support gasket is provided with a mounting hole. The mounting bolt may pass through the mounting hole to fix the test table 1 on the bearing production line, thereby facilitating the support and fixation of the test table 1.

[0044] A detection mounting frame 2 is slidably placed on the detection table 1. The detection mounting frame 2 is used to form a detection bracket. The detection mounting frame 2 can be an inverted concave gantry structure. The two ends of the bottom of the detection mounting frame 2 are slidably connected to the detection table 1 and are located on both sides of the support table 8. The detection mounting frame 2 can slide on the detection table 1 and slide stably without causing vibration due to the sliding of the detection mounting frame 2. Specifically, through grooves can be opened on both sides of the detection table 1, and the bottoms of the two ends of the detection mounting frame 2 are slidably placed inside the through grooves and pass through the through grooves. A sliding structure may be provided on the contact surface between the detection mounting frame 2 and the detection platform 1. The sliding structure may be a rolling groove and rolling ball combination structure. The rolling groove is provided on the detection platform 1 and is located on the contact surface with the detection mounting frame 2. The direction of the rolling groove is consistent with the sliding direction of the detection mounting frame 2. The rolling balls may be provided in multiple groups. Each group of rolling balls has at least two rolling balls, which are linearly arranged and nested inside the rolling groove. When the detection mounting frame 2 slides on the detection platform 1, the rolling balls roll inside the rolling groove, so that the detection mounting frame 2 slides smoothly, avoiding the instability of the detection data caused by the unstable sliding and increasing the readability of the data. Of course, the sliding structure may also be other structures, which will not be described in detail here.

[0045] The sliding drive structure (not shown in the attached figure) is installed on the detection platform 1 and connected to the detection mounting frame 2 to drive the detection mounting frame 2 to slide. The sliding direction of the detection mounting frame 2 is perpendicular to the plane where the detection mounting frame 2 is located. The sliding drive structure can be various, and specifically can be a motor and a lead screw combination structure. In this case, the sliding drive structure can be installed at the bottom of the detection platform 1. There are two lead screws, which are rotatably connected inside the through groove, and their axial direction is consistent with the sliding direction of the detection mounting frame 2. The motor is fixedly mounted at the bottom of one end of the detection platform 1, and the motor is connected to the lead screw in a transmission manner. The transmission connection can be a belt connection, which is not described in detail here. The bottom of the detection mounting frame 2 is provided with a nesting hole, and a ball is rotatably provided inside the nesting hole. The ball is nested in the wire groove of the lead screw. The motor can drive the lead screw to rotate, thereby completing the drive of the detection mounting frame 2. Of course, there are other structures of the sliding drive structure, and the specific structure is not described here.

[0046] The lifting support frame 4 is liftable and arranged on the detection mounting frame 2, and is used for the installation of the detection frame 5. The lifting support frame 4 can be a lever structure arranged horizontally, or a square steel pipe structure, which has a certain rigidity to avoid deformation and damage caused by force during the detection process. The two ends of the lifting support frame 4 can be slidably connected to the detection mounting frame 2. Specifically, a lifting groove can be opened on the inner side of the detection mounting frame 2, and the end of the lifting support frame 4 can be slidably nested in the lifting groove, so that the lifting support frame 4 can slide stably and the force can be uniform. In order to avoid the detection frame 5 being disturbed by the friction force of the detection mounting frame 2 during the detection process, resulting in inaccurate detection data. A vertical guide rod can be fixedly installed inside the lifting groove, and linear bearings are installed at both ends of the lifting support frame 4. The linear bearings are slidably nested on the guide rods, so that the lifting support frame 4 can slide stably.

[0047] The lifting drive member 3 is installed on the detection mounting frame 2, and its output end is connected to the lifting support frame 4, which is used to drive the lifting support frame 4 to lift and apply the detection pressure. The lifting drive member 3 can be a structure such as a hydraulic cylinder, an electric telescopic rod, etc., and the height and output pressure of the lifting support frame 4 can be controlled by controlling its output. The detection frame 5 is installed below the lifting support frame 4 and is used to install the support member 7. A pressure sensing unit 9 is provided between the detection frame 5 and the lifting support frame 4. The pressure sensing unit 9 is used to sense the pressure borne by the bearing 10 during the detection process. The specific connection method is the existing technology and is not described here. The detection frame 5 can include a gantry frame, a support member 7 and a fixing buckle 6. The gantry frame can be an inverted concave gantry structure with two bottom support rods. Of course, it can also be an inverted Y-shaped structure. Other situations are not described here. The support member 7 and the fixing buckle 6 are installed on the two bottom support rods. The support member 7 can be a detachable support rod structure, the fixing buckle 6 is on the bottom support rod, and the end of the support member 7 can be buckled and connected with the fixing buckle 6. When the bearing 10 is to be inspected, the bearing 10 can be nested on the support member 7, and the support member 7 is connected to the fixing buckle 6 to complete the installation of the bearing 10. Of course, the support member 7 and the fixing buckle 6 can also be other structures. For example, one end of the support member 7 is rotatably connected to a bottom support rod of the gantry frame, and the fixing buckle 6 is set on another bottom support rod of the gantry frame. The non-rotating connection end of the support member 7 can be fastened with the fixing buckle 6 for fixation. When the bearing 10 is to be inspected, the bearing 10 can be nested on the support member 7, and the support member 7 is rotated to fasten its end with the fixing buckle 6 for easy inspection of the bearing 10. Reference Figure 5-Figure 7The support member 7 may include a rotating base 11, a connecting rod 12, a supporting arc piece 13, an inclined surface block 15 and an inclined surface block 17. The rotating base 11 is rotatably connected to the gantry frame, one end of the connecting rod 12 is fixedly connected to the rotating base 11, the connecting rod 12 is a hollow structure, and a plurality of supporting arc pieces 13 are radially slidably connected to the connecting rod 12, and the supporting arc pieces 13 can slide along the radial direction of the connecting rod 12, and the number of supporting arc pieces 13 can be set to 3 groups. The supporting arc pieces 13 are located at the periphery of the connecting rod 12, and the connecting rod 20 is axially slidably nested inside the connecting rod 12, one end of the connecting rod 20 extends out of the non-connecting end of the connecting rod 12 and is fixedly connected to the inclined surface block 15, and the inclined surface of the inclined surface block 15 faces the direction of the fixed buckle 6. The connecting rod 20 is fixedly connected to a truncated cone 18, which radially penetrates the connecting rod 12 and can slide axially on the connecting rod 12, and the truncated cone 18 is located inside the supporting arc piece 13. A plurality of inclined grooves 19 are provided on the inclined arc surface of the truncated cone 18, and the number of the inclined grooves 19 is consistent with the number of the supporting arc pieces 13. A sliding rod is fixedly connected to the inner arc surface of the supporting arc piece 13, and the sliding rod slides and nests inside the inclined groove 19. When the inclined block 15 is squeezed, the connecting rod 20 and the truncated cone 18 slide toward the rotating base 11. Since the supporting arc piece 13 cannot slide axially on the connecting rod 12, the sliding rod is pushed outward by the movement of the truncated cone 18, so that the supporting arc piece 13 slides radially outward to complete the expansion. When the bearing 10 is nested in the supporting arc piece 13, the bearing 10 can be fixed by expansion. When the bearing 10 is tested, since the connecting rod 12 and the inclined block 15 are subjected to the squeezing force, the supporting arc piece 13 will not move radially due to the pressure, so as to ensure that the bearing 10 is fixed and stable, and will not cause detection errors. The supporting arc piece 13 and the connecting rod 12 can be connected by a sliding member 14, and the sliding member 14 limits the radial sliding of the supporting arc piece 13. The sliding member 14 may include a radial groove and a radial rod. The radial rod is fixedly connected to the connecting rod 12. The side wall of the supporting arc piece 13 is provided with a radial groove. The radial rod is slidably nested in the radial groove, thereby completing the radial limiting. The inclined plane block 17 can be elastically connected to the non-rotating connection end of the connecting rod 12. The corresponding position of the fixing buckle 6 can be provided with a groove or a limiting protrusion, so as to complete the rotation limiting of the support member 7. The specific details are prior art and will not be described here. The end of the inclined plane block 15 can be rotatably provided with at least one roller 16. The setting of the roller 16 can reduce the friction between the inclined plane block 15 and the fixing buckle 6, so that the support member 7 can rotate smoothly. Reference Figure 8The fixing buckle 6 includes a mounting groove 23, an extrusion block 22 and a bolt 21. The fixing buckle 6 corresponds to a mounting groove 23 on the inner side of the gantry frame. The extrusion block 22 is slidably mounted inside the mounting groove 23. The lower part of the extrusion block 22 is an inclined surface facing the support member 7. When the support member 7 rotates, the inclined surface of the inclined surface block 15 cooperates with the inclined surface of the extrusion block 22 for extrusion. The bolt 21 is threadedly embedded on the gantry frame. One end of the bolt 21 is rotatably connected to the extrusion block 22. The extrusion amount of the extrusion block 22 can be adjusted by rotating the bolt 21, so that different types of bearings 10 and the tightness of the fixation can be applied. The details are not repeated here.

[0048] The controller can be installed on the detection platform 1, and is electrically connected to the sliding drive structure, the lifting drive member 3, and the pressure sensing unit 9. The controller is used to control the output of the sliding drive structure, thereby controlling the moving position of the detection mounting frame 2. The controller is used to control the output of the lifting drive member 3, thereby controlling the height of the detection frame 5 and the output detection pressure. The controller is used to obtain the detection pressure through the pressure sensing unit 9. When the bearing 10 is detected, the detection mounting frame 2 and the lifting support frame 4 are in the initial detection position. The bearing 10 is nested on the support arc piece 13 of the support member 7, and then the support member 7 is rotated to embed its end into the interior of the fixing buckle 6 for buckling. The inclined surface of the extrusion block 22 squeezes the inclined surface block 15, and the inclined surface block 15 squeezes the connecting rod 20 to make the round table 18 move axially inside the connecting rod 12. Since the supporting arc piece 13 cannot slide axially on the connecting rod 12, the sliding rod is pushed by the movement of the round table 18 to move the supporting arc piece 13 outward, so that the supporting arc piece 13 slides radially outward to complete the expansion, filling the inner ring of the bearing 10, thereby completing the fixing of the bearing 10. The controller starts the lifting drive 3 to drive the lifting support frame 4 to descend, and makes the bottom of the bearing 10 contact the upper surface of the support table 8. When the pressure sensing unit 9 senses a pressure of F0, it records it. The F0 is the installation pressure of the detection frame 5, which can be obtained according to the equipment parameters, that is, the pressure sensed by the pressure sensing unit 9 when no detection is performed. The controller controls the sliding drive structure to drive the detection mounting frame 2 to slide smoothly at a preset speed v, and controls the lifting drive 3 to increase the detection pressure of the bearing 10 at a preset pressure increase speed ΔF. The relationship between the output of the lifting drive 3 and the output pressure of the lifting support frame 4 corresponds one to one, which can be obtained through the equipment parameters of the lifting drive 3, and will not be described in detail here. The pressure increase speed , where F Mis the detection standard radial bearing capacity of the bearing 10, which can be obtained through the specifications and quality requirements of the bearing 10. The L is the total length of the detection rolling path of the bearing 10, which can be understood as the effective length of the support table 8, the distance from the detection initial position to the detection end position. v is the moving speed of the detection mounting frame 2. Then, according to the pressure increase rate ΔF, a preset increase speed-output speed information table is searched to obtain the power output speed V of the lifting drive 3, and then the lifting drive 3 is controlled to output power at the power output speed V until the detection mounting frame 2 moves to the detection end position, and then the controller controls the detection mounting frame 2 and the lifting support frame 4 to return to the initial position. The increase speed-output speed information table can be obtained according to the equipment parameters of the lifting drive 3 or through experiments, which is not related to the protection subject of this application, and the specific content is not repeated here. Then, the real-time detection pressure F of the bearing 10 is obtained by sensing the pressure sensing unit 9, and then a plane coordinate system is constructed, the horizontal coordinate of the plane coordinate system is the rolling path l, and the vertical coordinate is the real-time detection pressure F-F0 of the bearing 10. Then calculate and obtain The coordinate points are marked and sorted. The sorting order can be sorted by increasing the rolling path l value, and then the radial load fluctuation index of the bearing 10 is calculated. , where i is The coordinates of the sequence number, F i is the detection pressure of the coordinate point numbered i, I is The total number of coordinates, i=1, 2,…, I. k is the fluctuation evaluation ordinal number, K is the total number of fluctuation evaluations, K is generally 3-5; k=I-K+1, I-K+2,…,I. The unit fluctuation parameter can be the difference in the induction fluctuation of the pressure sensing unit 9 when the pressure is F0, which can be obtained through experiments. The details are not described here. This method can remove the pressure fluctuation interference during the normal operation of the ball in the bearing 10, making the evaluation more accurate and avoiding the interference caused by normal fluctuations. Then, it is judged whether the radial load fluctuation index E is greater than a preset standard load fluctuation index E. 标 If yes, it is judged as unqualified, if no, it is judged as qualified. Standard load fluctuation index E 标 It can be obtained according to the use parameters of the bearing 10, generally 0.1-0.2, and is specifically designed according to the actual situation, which will not be elaborated here. This method can be used to determine whether the radial pressure bearing capacity of the bearing 10 is qualified, has strong evaluation ability, and is consistent with the use dynamic structure of the bearing 10. The fluctuation of the radial load fluctuation index during the operation of the bearing 10 can better evaluate its use efficiency, and has strong evaluation ability. Example

[0049] refer to Fig. 9In this embodiment, a bearing running strength detection method is proposed, comprising the following steps:

[0050] S1 , the controller starts the lifting drive member 3 to drive the lifting support frame 4 to descend, and makes the bottom of the bearing 10 contact with the upper surface of the support table 8 .

[0051] S2. When the pressure sensing unit 9 senses that the pressure is F0, it records it.

[0052] S3. The sliding drive structure drives the detection mounting frame 2 to slide smoothly at a preset speed v, and controls the lifting drive member 3 to increase the detection pressure of the bearing 10 at a preset pressure increase speed ΔF until the detection mounting frame 2 moves to the detection end position.

[0053] S4. Obtain the real-time detection pressure F of the bearing 10 through the pressure sensing unit 9 .

[0054] S5. Construct a plane coordinate system, wherein the horizontal coordinate of the plane coordinate system is the rolling path l, and the vertical coordinate is the real-time detection pressure F-F0 of the bearing 10.

[0055] S6. Calculation The coordinate points are marked and sorted.

[0056] S7. Calculate and obtain the radial load fluctuation index E of the bearing 10.

[0057] S8. Determine whether the radial load fluctuation index E is greater than a preset standard load fluctuation index E. 标 If yes, it is judged as unqualified, if no, it is judged as qualified.

[0058] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A bearing running strength detection device, characterized in that: The bearing running strength detection device comprises: Testing table; a testing mounting frame is slidably placed on the testing table; The sliding drive structure is installed on the detection platform and connected to the detection mounting frame to drive the detection mounting frame to slide; A lifting support frame is liftably arranged on the detection mounting frame; A lifting drive component is installed on the detection mounting frame, and its output end is connected to the lifting support frame. The lifting drive component is used to drive the lifting support frame to move up and down and apply detection pressure; A detection frame is installed below the lifting support frame and is used to install the bearing. A pressure sensing unit is provided between the detection frame and the lifting support frame. The pressure sensing unit is used to sense the pressure borne by the bearing during the detection process. The controller is electrically connected to the sliding drive structure, the lifting drive component, and the pressure sensing unit; when the bearing is tested, the test mounting frame and the lifting support frame are in the initial test position; the bearing is installed on the test frame; the controller starts the lifting drive component to drive the lifting support frame to descend, and makes the bottom of the bearing contact with the upper surface of the support table; when the pressure sensing unit senses the pressure as F0, it records it; the sliding drive structure drives the test mounting frame to slide smoothly at a preset speed v, and controls the lifting drive component to increase the driving amount of the bearing at a preset pressure increase speed ΔF until the test mounting frame moves to the end position of the test; the real-time test pressure F of the bearing is obtained by sensing the pressure sensing unit; a plane coordinate system is constructed, the horizontal coordinate of the plane coordinate system is the rolling path l, and the vertical coordinate is the real-time test pressure F-F0 of the bearing; and the calculation obtains The coordinate points are marked and sorted; the radial load fluctuation index E of the bearing is calculated; and it is determined whether the radial load fluctuation index E is greater than a preset standard load fluctuation index E 标 , if yes, it is judged as unqualified, if no, it is judged as qualified; The bearing radial load fluctuation index , where i is The coordinates of the sequence number, F i is the detection pressure of the coordinate point numbered i, I is The total number of coordinates, i=1, 2, ┈, I; k is the fluctuation evaluation ordinal number, K is the total number of fluctuation evaluations; k=I-K+1, I-K+2,…,I; is the unit fluctuation parameter, which is the induction fluctuation difference of the pressure sensing unit when the pressure is F0.

2. A bearing running strength detection device according to claim 1, characterized in that: A sliding structure is provided on the contact surface between the detection mounting frame and the detection platform. The sliding structure is a combination structure of a rolling groove and a rolling ball. The rolling groove is opened on the detection platform and is located on the contact surface with the detection mounting frame. The direction of the rolling groove is consistent with the sliding direction of the detection mounting frame. Multiple groups of rolling balls are provided. Each group of rolling balls has at least two rolling balls, which are linearly arranged and nested inside the rolling groove. When the detection mounting frame slides on the detection platform, the rolling balls roll inside the rolling groove.

3. A bearing running strength detection device according to claim 1, characterized in that: The sliding drive structure is a motor and a lead screw combination structure, two lead screws are provided and are rotatably connected inside the through slot, and the axial direction thereof is consistent with the sliding direction of the detection mounting frame; The motor is fixedly mounted at the bottom of one end of the detection platform, and the motor is connected to the screw rod in transmission; a nesting hole is arranged at the bottom of the detection mounting frame, and a ball is rotatably arranged inside the nesting hole, and the ball is nested in the wire groove of the screw rod.

4. A bearing running strength detection device according to claim 1, characterized in that: The detection frame includes a gantry frame, a support member and a fixing buckle. The gantry frame is an inverted concave-shaped gantry structure with two bottom support rods. One end of the support member is rotatably connected to one bottom support rod of the gantry frame, and the fixing buckle is arranged on the other bottom support rod of the gantry frame. The non-rotating connection end of the support member is fastened with the fixing buckle for fixing. When the bearing is tested, the bearing is nested on the support member, and the support member is rotated to connect its end with the fixing buckle.

5. A bearing running strength detection device according to claim 4, characterized in that: The support member includes a rotating base, a connecting rod, a supporting arc piece, an inclined surface block and an inclined surface clamping block; the rotating base is rotatably connected to the gantry frame, one end of the connecting rod is fixedly connected to the rotating base, the connecting rod is a hollow structure, a plurality of supporting arc pieces are radially slidably connected to the connecting rod, the supporting arc pieces slide in the radial direction of the connecting rod, the supporting arc pieces are located on the periphery of the connecting rod, the connecting rod is axially slidably nested inside the connecting rod, one end of the connecting rod extends out of the non-connecting end of the connecting rod and is fixedly connected to the inclined surface block, the inclined surface of the inclined surface block faces the direction of the fixing buckle; the connecting rod is fixedly connected to a truncated cone, the truncated cone radially penetrates The connecting rod slides axially on the connecting rod, and the table is inside the supporting arc piece; a plurality of inclined grooves are opened on the inclined arc surface of the table, and the number of the inclined grooves is consistent with the number of the supporting arc pieces. A sliding rod is fixedly connected to the inner arc surface of the supporting arc piece, and the sliding rod is slidably nested inside the inclined groove; when the inclined block is squeezed, the connecting rod and the table slide toward the rotating base. Since the supporting arc piece cannot slide axially on the connecting rod, the sliding rod is pushed outward by the movement of the table, thereby causing the supporting arc piece to slide radially outward to complete the expansion; when the bearing is nested in the supporting arc piece, the bearing is fixed by expansion.

6. A bearing running strength detection device according to claim 5, characterized in that: The fixing buckle comprises an installation groove, an extrusion block and a bolt. An installation groove is provided on the inner side of the gantry frame corresponding to the fixing buckle. An extrusion block is slidably installed inside the installation groove. The lower part of the extrusion block is an inclined surface facing the side of the support member. When the support member rotates, the inclined surface of the inclined surface block cooperates with the inclined surface of the extrusion block for extrusion. A bolt is threadedly embedded on the gantry frame. One end of the bolt is rotatably connected to the extrusion block. The extrusion amount of the extrusion block is adjusted by rotating the bolt.

7. A bearing running strength detection device according to claim 1, characterized in that: The pressure increase rate , where F M is the standard radial bearing capacity of the bearing; L is the total length of the bearing's detection rolling path; and v is the moving speed of the detection mounting frame.

8. A bearing operation strength detection method, applied to the bearing operation strength detection device according to any one of claims 1 to 7, characterized in that: The bearing running strength detection method comprises the following steps: S1, start the lifting drive member to drive the lifting support frame to descend, and make the bottom of the bearing contact with the upper surface of the support table; S2. When the pressure sensing unit senses a pressure of F0, it records it; S3, the sliding drive structure drives the detection mounting frame to slide smoothly at a preset speed v, and controls the lifting drive member to increase the driving amount of the bearing at a preset pressure increase speed ΔF until the detection mounting frame moves to the detection end position; S4, obtaining a real-time detection pressure F of the bearing through a pressure sensing unit; S5, constructing a plane coordinate system, wherein the abscissa of the plane coordinate system is the rolling path l, and the ordinate is the real-time detection pressure F-F0 of the bearing; S6. Calculation The coordinate points are marked and sorted; S7. Calculate and obtain the radial load fluctuation index E of the bearing; S8. Determine whether the radial load fluctuation index E is greater than a preset standard load fluctuation index E. 标 , if yes, it is judged as unqualified, if no, it is judged as qualified; The bearing radial load fluctuation index , where i is The coordinates of the sequence number, F i is the detection pressure of the coordinate point numbered i, I is The total number of coordinates, i=1, 2, …, I; k is the ordinal number of the fluctuation evaluation, K is the total number of fluctuation evaluations; k=I-K+1, I-K+2,…,I; is the unit fluctuation parameter, which is the induction fluctuation difference of the pressure sensing unit when the pressure is F0.

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