Shield tunneling machine bearing performance testing device

Abstract

The invention relates to the technical field of bearing detection, and discloses a shield tunneling machine bearing performance testing device which comprises a supporting table, a motor is fixedly connected to the bottom of the supporting table, a placing ring is fixedly connected to the top of the supporting table, and a fixing plate is fixedly connected to the top of the supporting table. A hydraulic cylinder is started to stretch out to drive a pushing ring to descend to make contact with a spring ring, the spring ring descends, a first connecting rod rotates, a clamping block is pushed to move towards the inner wall of a bearing inner ring, the spring ring descends to drive a sliding rod to descend, a sliding ring descends to extrude gas in a fixing barrel, and the clamping block drives a gas conveying pipe to move; when the three clamping blocks make contact with the inner wall of the bearing inner ring preliminarily at the same time, the gas conveying pipe can be separated from the blocking piston, high-pressure gas can enter the gas conveying pipe, the spring pressing plate is pushed to descend, the top of the bearing inner ring is extruded, the bearing inner ring can be further restrained by pressing the clamped position of the bearing inner ring, and the bearing inner ring is prevented from being damaged. And the clamping device is effectively prevented from deviating in the clamping process.

Description

Technical Field

[0001] The invention relates to the technical field of bearing detection equipment, in particular to a shield machine bearing performance testing device. Background Art

[0002] A shield machine is a tunnel boring machine. The construction method of the shield machine is that the tunnel boring machine builds a "shield" for laying the tunnel while excavating. It is different from the open construction method. Internationally, the generalized shield machine can also be used in rock formations. Among them, the main bearing of the shield machine is an important component that bears the load when the shield machine is operating. Its size is generally large. In order to ensure the stability of the bearing during installation and use, it is usually necessary to detect the size of the bearing.

[0003] Among them, when detecting the roundness of the inner ring of the main bearing, since the size of the main bearing is generally large and the inner diameter of the inner ring has internal teeth, the presence of the internal teeth causes the contact area with the clamping block to be reduced during the clamping and positioning process of the bearing, which may cause the clamping position of the inner ring to be offset by the clamping block, affecting the stability of the bearing and thus affecting the accuracy of the roundness detection. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a shield machine bearing performance testing device, comprising a support platform, a motor is fixedly connected to the bottom of the support platform, a placement ring is fixedly connected to the top of the support platform, a fixed plate is fixedly connected to the top of the support platform, a hydraulic cylinder is fixedly connected to the top of the fixed plate, and a push ring is fixedly connected to the bottom output end of the hydraulic cylinder; The clamping mechanism includes a bearing inner ring, a rotation rod for limiting the clamping of the bearing inner ring, a spring ring, a clamping block, a connecting rod, an extrusion component for ensuring the balance of the bearing inner ring, and a measuring component for measuring the size of the bearing inner ring; The bottom of the inner ring of the bearing is placed on the top of the placing ring, the bottom of the rotating rod is fixedly connected to the top output end of the motor, the outer wall of the rotating rod is slidably connected to the inner wall of the spring ring, there are three clamping blocks, and there are six connecting rods. The inner walls of the three connecting rods one at the bottom are all rotatably connected to the outer wall of the rotating rod, and the inner walls of the three connecting rods one at the top are all rotatably connected to the outer wall of the spring ring. The six connecting rods are grouped in twos, and the side walls of the three clamping blocks are rotatably connected to the inner walls of the three groups of connecting rods one. The staff places the inner ring of the bearing on the placing ring through lifting equipment, and then starts the hydraulic cylinder to extend and drive the push ring to descend, so that the push ring contacts the spring ring, and the push ring will push the spring ring to descend, so that the connecting rod one rotates and folds, pushing the clamping block to move toward the inner wall of the inner ring of the bearing. When the spring ring descends, it will also drive the sliding rod to descend, thereby causing the sliding ring to descend. When the sliding ring drives the blocking rod to descend and enters the blocking piston, the blocking rod will block the blocking piston. At this time, the fixed cylinder In the sealed state, the sliding ring will squeeze the gas in the fixed cylinder when it descends, causing the gas to generate high pressure. When the clamping block moves, it will drive the gas pipe to move. When the three clamping blocks initially contact the inner wall of the bearing inner ring at the same time, the gas pipe will separate from the blocking piston, and high-pressure gas will enter the gas pipe, pushing the spring pressure plate down to squeeze the top of the bearing inner ring until the clamping block completely clamps the bearing inner ring. At this time, the distance between the laser detector and the bearing inner ring can be adjusted. After the adjustment is completed, the threaded rod is rotated to contact the laser detector, the laser detector is fixed, and then the laser detector is started. At the same time, the motor is started to drive the rotating rod to rotate, and the bearing inner ring is driven to rotate through the clamping block, so that the laser detector detects the roundness of the bearing inner ring throughout the circumference. By clamping the bearing inner ring, the clamped position of the bearing inner ring is pressed, which can further constrain the bearing inner ring and reduce the movement of the bearing inner ring during the clamping process, effectively preventing it from offsetting during the clamping process and reducing the error when the bearing inner ring is measured.

[0005] Preferably, the extrusion assembly includes a fixed cylinder fixedly connected to the outer wall of the rotating rod, a sliding ring is slidably connected to the inner wall of the fixed cylinder, three sliding rods are fixedly connected to the bottom of the spring ring, and the outer walls of the three sliding rods are fixedly connected to the inner wall of the spring ring.

[0006] Preferably, the extrusion assembly also includes three blocking rods fixedly connected to the bottom of the sliding ring, the inner walls of the three clamping blocks are fixedly connected to air pipes, the outer walls of the three air pipes are slidably connected to the inner wall of the fixed cylinder, and three blocking pistons are fixedly connected to the inner wall of the fixed cylinder.

[0007] Preferably, the extrusion assembly also includes a spring pressure plate slidably connected to the inner wall of the air pipe, the outer walls of the three blocking pistons are slidably connected to the inner walls of the three air pipes, and the outer walls of the three blocking rods are slidably connected to the inner walls of the three blocking pistons.

[0008] Preferably, the measuring component includes a laser detector slidably connected to the inner wall of the fixed plate, a threaded rod is threadedly connected to the inner wall of the fixed plate, a lifting component is arranged on the top of the support platform, and a fitting component is arranged on the inner wall of the placement ring.

[0009] Preferably, the jacking assembly includes a connecting plate arranged on the top of the support platform, the top of the support platform is fixedly connected to two spring sliding rods, the tops of the two spring sliding rods are fixedly connected to the bottom of the connecting plate, the top of the support platform is fixedly connected to three fixing frames, and the inner walls of the three fixing frames are rotatably connected to a seesaw plate; Among them, three sliding blocks are slidably connected to the inner wall of the support platform, the bottoms of the three sliding blocks are slidably connected to the inner walls of the three seesaws, and the bottoms of the connecting plates are slidably connected to the inner walls of the three seesaws. During the continuous descending process of the sliding rod, the sliding rod will contact the connecting plate, push the connecting plate down, retract the spring sliding rod, accumulate rebound force, and when the connecting plate descends, the seesaw will rotate, tilt the seesaw, and push the sliding block to rise.

[0010] Preferably, the lifting assembly further comprises a roller 1 rotatably connected to the inner wall of the sliding block, three connecting rods are slidably connected to the inner wall of the placement ring, the bottoms of the three connecting rods are rotatably connected to connecting rod 2, and the inner walls of the three connecting rods 2 are rotatably connected to the side walls of the three sliding blocks; Among them, the inner walls of the three connecting rods are all slidably connected with spring connecting frames, and the inner walls of the three spring connecting frames are all rotatably connected with roller two, thereby driving roller one to rise. When the three clamping blocks initially contact the inner ring of the bearing, roller one will also contact the inner ring of the bearing, lift the inner ring of the bearing and separate it from the placement ring. At the same time, when the sliding block rises, it will also drive connecting rod two to rotate, so that connecting rod two pulls the connecting rod toward the outer wall of the inner ring of the bearing, driving the spring connecting frame and roller two to move together, so that roller two contacts the outer wall of the inner ring of the bearing, fits with the outer wall of the inner ring of the bearing, and lifts the inner ring of the bearing through roller two, thereby reducing the friction between the inner ring of the bearing and the placement ring when it rotates, avoiding large friction and affecting the smooth rotation of the inner ring of the bearing.

[0011] Preferably, the fitting assembly includes three air collecting frames fixedly connected to the inner wall of the placement ring, the inner walls of the three air collecting frames are slidably connected with sliding plates, the bottoms of the three sliding plates are fixedly connected to the side walls of the three sliding blocks, and the inner walls of the three air collecting frames are provided with a plurality of through holes.

[0012] Preferably, the fitting component also includes a jet plate fixedly connected to the top of the air collecting frame, the inner walls of the three jet plates are rotatably connected with spring baffles, the tops of the three sliding plates are fixedly connected with six push rods, and the tops of the three air collecting frames are fixedly connected with a fixed frame 2. When the sliding block rises, the sliding plate will also be driven to rise. When the sliding plate moves over the through hole, the sliding plate continues to move, and it will squeeze the gas in the air collecting frame. At this time, the squeezed gas will be blocked by the spring baffle, so the gas pressure will increase. When the sliding plate moves, it will also drive the push rod to move. When the push rod moves to contact the spring baffle, the push rod will push the spring baffle to rotate, allowing the spring baffle to accumulate rebound force, and a gap will leak between the spring baffle and the jet plate, and the high-pressure gas in the air collecting frame will be ejected through the gap between the spring baffle and the jet plate.

[0013] Preferably, the fitting component also includes a rotating block rotatably connected to the inner wall of the second fixed frame, the side walls of the three rotating blocks are fixedly connected with arc springs, the bottoms of the three arc springs are fixedly connected to the tops of the three air collecting frames, and the bottoms of the three sliding plates are fixedly connected with pushing plates. When the sliding plate rises, it will also drive the pushing plate to rise, so that the pushing plate contacts the rotating block, pushing the rotating block to rotate, so that the side of the rotating block in contact with the pushing plate rises and the other side lowers, and the lowered side will squeeze the arc spring to accumulate rebound force. When the clamping block clamps the inner ring of the bearing, the pushing plate will separate from the rotating block, the driving force on the rotating block disappears, and the rebound force of the arc spring will be instantly released, pushing the rotating block to rotate quickly, so that the rotating block contacts the bottom of the clamping block, and lightly taps its bottom.

[0014] The present invention has the following beneficial effects: (1) When the present invention is used, the staff places the inner ring of the bearing on the placement ring through the lifting equipment, and then starts the hydraulic cylinder to extend and drive the push ring to descend, so that the push ring contacts the spring ring. The push ring will push the spring ring to descend, so that the connecting rod rotates and folds, pushing the clamping block to move toward the inner wall of the inner ring of the bearing. When the spring ring descends, it will also drive the sliding rod to descend, so that the sliding ring will descend. When the sliding ring drives the blocking rod to descend and enters the blocking piston, the blocking rod will block the blocking piston. At this time, the fixed cylinder is in a sealed state. The sliding ring descends and squeezes the gas in the fixed cylinder, causing the gas to generate high pressure. When the clamping block moves, it will drive the gas pipe to move. When the three clamping blocks initially contact the inner wall of the inner ring of the bearing at the same time, the gas pipe will contact the blocking piston. When the piston separates, high-pressure gas will enter the gas pipe, pushing the spring pressure plate down and squeezing the top of the inner ring of the bearing until the clamping block completely clamps the inner ring of the bearing. At this time, the distance between the laser detector and the inner ring of the bearing can be adjusted. After the adjustment is completed, turn the threaded rod to contact the laser detector, fix the laser detector, and then start the laser detector. At the same time, start the motor to drive the rotating rod to rotate, and drive the inner ring of the bearing to rotate through the clamping block, so that the laser detector can detect the roundness of the entire circumference of the inner ring of the bearing. By clamping the inner ring of the bearing and pressing the clamped position of the inner ring of the bearing, the inner ring of the bearing can be further constrained, and the movement range of the inner ring of the bearing during the clamping process can be reduced, which can effectively prevent it from offsetting during the clamping process and reduce the error when the inner ring of the bearing is measured.

[0015] When the sliding block is lifted up, the spring connecting frame and the roller are moved upwards, so that the spring connecting frame and the roller are moved upwards, and ... so that the spring connecting frame and the roller are moved upwards, and the spring connecting frame and the roller are moved upwards, so that the spring connecting frame and the roller are moved upwards, so that the spring connecting frame and the roller are moved upwards, so that the spring connecting frame and the roller are moved upwards, so that the spring connecting frame and the roller are moved upwards, so that the spring connecting frame and the roller are moved upwards, so that the spring connecting frame and the roller are moved upwards, so that the spring connecting frame and the roller are moved upwards, so that the spring connecting frame and the roller are moved upwards, so that the spring connecting frame and the roller are moved upwards,

[0016] (3) When the sliding block of the present invention rises, it will also drive the sliding plate to rise. When the sliding plate moves over the through hole, the sliding plate continues to move and will squeeze the gas in the gas collecting frame. At this time, the squeezed gas will be blocked by the spring baffle, so the gas pressure will increase. When the sliding plate moves, it will also drive the push rod to move. When the push rod moves to contact the spring baffle, the push rod will push the spring baffle to rotate, allowing the spring baffle to accumulate rebound force. A gap will leak between the spring baffle and the jet plate, and the high-pressure gas in the gas collecting frame will be ejected through the gap between the spring baffle and the jet plate. At this time, the three clamping blocks initially contact the inner wall of the inner ring of the bearing, and the high-pressure gas will be ejected toward the contact surface between the two. The air blowing can form an air film on the contact surface for temporary lubrication, thereby reducing the friction between the contact surfaces of the two, so that the clamping block and the inner ring of the bearing can better adapt to each other's surface shapes and make the contact between the contact surfaces of the two more uniform.

[0017] (4) When the sliding plate of the present invention rises, it will also drive the pushing plate to rise, allowing the pushing plate to contact the rotating block, pushing the rotating block to rotate, allowing the side of the rotating block in contact with the pushing plate to rise and the other side to fall. The lowered side will squeeze the arc spring, allowing the arc spring to accumulate rebound force. When the clamping block clamps the inner ring of the bearing, the pushing plate will separate from the rotating block, the driving force on the rotating block will disappear, and the rebound force of the arc spring will be released instantly, pushing the rotating block to rotate quickly, allowing the rotating block to contact the bottom of the clamping block, and lightly knocking on its bottom, so that the clamping force between the clamping block and the inner ring of the bearing is released and redistributed to a certain extent, effectively preventing the small contact area between the two, which may cause the clamping force to be too concentrated. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0019] Figure 1 It is a schematic cross-sectional view of the overall structure of the present invention; Figure 2 It is a schematic diagram of the overall structure of the present invention; Figure 3 It is a cross-sectional schematic diagram of the fixing tube of the present invention; Figure 4 For the present invention Figure 3 A is an enlarged schematic diagram; Figure 5 For the present invention Figure 3 A magnified schematic diagram of B; Figure 6 It is a cross-sectional schematic diagram of the gas collecting frame of the present invention; Figure 7 For the present invention Figure 6 A magnified schematic diagram of middle C; Figure 8 It is a top view schematic diagram of the placement ring of the present invention.

[0020] In the accompanying drawings, the components represented by the reference numerals are listed as follows: In the figure: 1. Support table; 11. Motor; 12. Placement ring; 13. Fixing plate; 14. Hydraulic cylinder; 15. Pushing ring; 2. Clamping mechanism; 21. Inner ring of bearing; 22. Rotating rod; 23. Spring ring; 24. Clamping block; 25. Connecting rod 1; 3. Extrusion assembly; 31. Fixing cylinder; 32. Sliding ring; 33. Sliding rod; 34. Blocking rod; 35. Gas pipe; 36. Blocking piston; 37. Spring pressure plate; 4. Measuring assembly; 41. Laser detector; 42. Thread Rod; 5, lifting assembly; 51, connecting plate; 52, spring sliding rod; 53, fixed frame 1; 54, seesaw; 55, sliding block; 56, roller 1; 57, connecting rod; 571, connecting rod 2; 58, spring connecting frame; 59, roller 2; 6, fitting assembly; 61, air collecting frame; 62, sliding plate; 63, through hole; 64, jet plate; 65, spring baffle; 66, push rod; 67, fixed frame 2; 671, rotating block; 672, arc spring; 68, push plate. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0022] For example, see Figure 1-Figure 5 The present invention is a shield machine bearing performance testing device, comprising a support platform 1, a motor 11 is fixedly connected to the bottom of the support platform 1, a placement ring 12 is fixedly connected to the top of the support platform 1, a fixed plate 13 is fixedly connected to the top of the support platform 1, a hydraulic cylinder 14 is fixedly connected to the top of the fixed plate 13, and a push ring 15 is fixedly connected to the bottom output end of the hydraulic cylinder 14; The clamping mechanism 2 includes a bearing inner ring 21, a rotation rod 22 for limiting the clamping of the bearing inner ring 21, a spring ring 23, a clamping block 24, a connecting rod 25, an extrusion component 3 for ensuring the balance of the bearing inner ring 21, and a measuring component 4 for measuring the size of the bearing inner ring 21; The bottom of the bearing inner ring 21 is placed on the top of the placement ring 12, the bottom of the rotating rod 22 is fixedly connected to the top output end of the motor 11, the outer wall of the rotating rod 22 is slidably connected to the inner wall of the spring ring 23, the number of the clamping blocks 24 is three, the number of the connecting rods 25 is six, the inner walls of the three connecting rods 25 at the bottom are all rotatably connected to the outer wall of the rotating rod 22, the inner walls of the three connecting rods 25 at the top are all rotatably connected to the outer wall of the spring ring 23, the six connecting rods 25 are grouped in pairs, and the side walls of the three clamping blocks 24 are all rotatably connected to the inner walls of the three groups of connecting rods 25 , the staff uses the lifting equipment to place the bearing inner ring 21 on the placing ring 12, and then starts the hydraulic cylinder 14 to extend and drive the push ring 15 to descend, so that the push ring 15 contacts the spring ring 23, and the push ring 15 will push the spring ring 23 to descend, so that the connecting rod 25 rotates and folds, and pushes the clamping block 24 to move toward the inner wall of the bearing inner ring 21. When the spring ring 23 descends, it will also drive the sliding rod 33 to descend, so that the sliding ring 32 descends. When the sliding ring 32 drives the blocking rod 34 to descend and enters the blocking piston 36, the blocking rod 34 will block the blocking piston 36. At this time, the fixed The cylinder 31 is in a sealed state. When the sliding ring 32 descends, it will squeeze the gas in the fixed cylinder 31, causing the gas to generate high pressure. When the clamping block 24 moves, it will drive the gas pipe 35 to move. When the three clamping blocks 24 initially contact the inner wall of the bearing inner ring 21 at the same time, the gas pipe 35 will separate from the blocking piston 36, and the high-pressure gas will enter the gas pipe 35, pushing the spring pressure plate 37 down to squeeze the top of the bearing inner ring 21 until the clamping block 24 completely clamps the bearing inner ring 21. At this time, the distance between the laser detector 41 and the bearing inner ring 21 can be adjusted. After the adjustment is completed , rotate the threaded rod 42 to contact the laser detector 41, fix the laser detector 41, and then start the laser detector 41. At the same time, start the motor 11 to drive the rotating rod 22 to rotate, and drive the bearing inner ring 21 to rotate through the clamping block 24, so that the laser detector 41 detects the roundness of the entire circumference of the bearing inner ring 21. When the bearing inner ring 21 is clamped, the clamped position of the bearing inner ring 21 is pressed, which can further constrain the bearing inner ring 21 and reduce the movement range of the bearing inner ring 21 during the clamping process, effectively preventing it from deviating during the clamping process, and reducing the error when the bearing inner ring 21 is measured.

[0023] For example 2, please refer to Figure 6-Figure 8 The present invention is a shield machine bearing performance testing device. Based on Example 1, the extrusion assembly 3 includes a fixed cylinder 31 fixedly connected to the outer wall of the rotating rod 22, a sliding ring 32 is slidably connected to the inner wall of the fixed cylinder 31, and three sliding rods 33 are fixedly connected to the bottom of the spring ring 23, and the outer walls of the three sliding rods 33 are fixedly connected to the inner wall of the spring ring 23.

[0024] The extrusion assembly 3 also includes three blocking rods 34 fixedly connected to the bottom of the sliding ring 32, the inner walls of the three clamping blocks 24 are fixedly connected to air pipes 35, the outer walls of the three air pipes 35 are slidably connected to the inner wall of the fixed cylinder 31, and the inner wall of the fixed cylinder 31 is fixedly connected to three blocking pistons 36.

[0025] The extrusion assembly 3 also includes a spring pressure plate 37 slidably connected to the inner wall of the air pipe 35, the outer walls of the three blocking pistons 36 are slidably connected to the inner walls of the three air pipes 35, and the outer walls of the three blocking rods 34 are slidably connected to the inner walls of the three blocking pistons 36.

[0026] The measuring component 4 includes a laser detector 41 slidably connected to the inner wall of the fixed plate 13, a threaded rod 42 is threadedly connected to the inner wall of the fixed plate 13, a lifting component 5 is arranged on the top of the support platform 1, and a fitting component 6 is arranged on the inner wall of the placement ring 12. The model of the laser detector 41 is: ZLDS10X, the measurement accuracy um: up to ±1, and the measurement speed: 0-70000Hz.

[0027] The lifting assembly 5 includes a connecting plate 51 arranged on the top of the support platform 1, two spring sliding rods 52 are fixedly connected to the top of the support platform 1, the tops of the two spring sliding rods 52 are fixedly connected to the bottom of the connecting plate 51, and three fixing frames 53 are fixedly connected to the top of the support platform 1, and the inner walls of the three fixing frames 53 are rotatably connected to the seesaw plates 54; Among them, three sliding blocks 55 are slidably connected to the inner wall of the support platform 1, and the bottoms of the three sliding blocks 55 are slidably connected to the inner walls of the three seesaws 54. The bottoms of the connecting plates 51 are slidably connected to the inner walls of the three seesaws 54. During the continuous descending process of the sliding rod 33, the sliding rod 33 will contact the connecting plate 51, push the connecting plate 51 down, and retract the spring sliding rod 52 to accumulate rebound force. When the connecting plate 51 descends, the seesaw 54 will rotate, causing the seesaw 54 to tilt and push the sliding block 55 to rise.

[0028] The lifting assembly 5 also includes a roller 56 rotatably connected to the inner wall of the sliding block 55, and three connecting rods 57 are slidably connected to the inner wall of the placement ring 12. The bottoms of the three connecting rods 57 are all rotatably connected to connecting rods 571, and the inner walls of the three connecting rods 571 are all rotatably connected to the side walls of the three sliding blocks 55. Among them, the inner walls of the three connecting rods 57 are all slidably connected with spring connecting frames 58, and the inner walls of the three spring connecting frames 58 are all rotatably connected with roller two 59, thereby driving roller one 56 to rise. When the three clamping blocks 24 initially contact the bearing inner ring 21, roller one 56 will also contact the bearing inner ring 21, lift the bearing inner ring 21 and separate it from the placement ring 12. At the same time, when the sliding block 55 rises, it will also drive the connecting rod two 571 to rotate, so that the connecting rod two 571 pulls the connecting rod 57 toward the outer wall of the bearing inner ring 21, driving the spring connecting frame 58 and roller two 59 to move together, so that roller two 59 contacts the outer wall of the bearing inner ring 21 and fits with the outer wall of the bearing inner ring 21, and lifts the bearing inner ring 21 through roller two 59, thereby reducing the friction between the bearing inner ring 21 and the placement ring 12 when the bearing inner ring 21 rotates, avoiding large friction and affecting the smooth rotation of the bearing inner ring 21.

[0029] The fitting assembly 6 includes three air collecting frames 61 fixedly connected to the inner wall of the placement ring 12, and the inner walls of the three air collecting frames 61 are slidably connected with sliding plates 62. The bottoms of the three sliding plates 62 are fixedly connected to the side walls of the three sliding blocks 55, and the inner walls of the three air collecting frames 61 are provided with a plurality of through holes 63.

[0030] The fitting component 6 also includes an air jet plate 64 fixedly connected to the top of the air collecting frame 61. The inner walls of the three air jet plates 64 are rotatably connected with spring baffles 65. The tops of the three sliding plates 62 are fixedly connected with six push rods 66. The tops of the three air collecting frames 61 are fixedly connected with fixed frames 67. When the sliding block 55 rises, the sliding plate 62 will also be driven to rise. When the sliding plate 62 moves over the through hole 63, the sliding plate 62 continues to move, which will squeeze the gas in the air collecting frame 61. At this time, the squeezed gas will be blocked by the spring baffle 65, so the gas pressure will increase. When the sliding plate 62 moves, it will also drive the push rod 66 to move. When the push rod 66 moves to contact the spring baffle 65, the push rod 66 will push the spring baffle 65 to rotate, allowing the spring baffle 65 to accumulate resilience. A gap will leak out between the spring baffle 65 and the air jet plate 64, and the high-pressure gas in the air collecting frame 61 will be ejected through the gap between the spring baffle 65 and the air jet plate 64.

[0031] The fitting assembly 6 also includes a rotating block 671 rotatably connected to the inner wall of the fixing frame 2 67. The side walls of the three rotating blocks 671 are fixedly connected with arc springs 672. The bottoms of the three arc springs 672 are fixedly connected to the tops of the three gas collecting frames 61. The bottoms of the three sliding plates 62 are fixedly connected with push plates 68. When the sliding plates 62 rise, they also drive the push plates 68 to rise, so that the push plates 68 contact the rotating blocks 671, push the rotating blocks 671 to rotate, and the rotating blocks 67 The side in contact with the push plate 68 rises, and the other side falls. The falling side will squeeze the arc spring 672, allowing the arc spring 672 to accumulate resilience. When the clamping block 24 clamps the bearing inner ring 21, the push plate 68 will separate from the rotating block 671, and the driving force on the rotating block 671 disappears. The resilience of the arc spring 672 will be released instantly, pushing the rotating block 671 to rotate quickly, so that the rotating block 671 contacts the bottom of the clamping block 24 and slightly knocks on its bottom.

[0032] There is no limitation on the number of the above components, and relevant technicians in the field can freely set them according to actual needs, as long as the above components are installed at the corresponding component connection positions.

[0033] A specific application of this embodiment is as follows: when the present invention is used, the staff places the bearing inner ring 21 on the placing ring 12 through a lifting device, and then starts the hydraulic cylinder 14 to extend and drive the push ring 15 to descend, so that the push ring 15 contacts the spring ring 23, and the push ring 15 will push the spring ring 23 to descend, thereby causing the connecting rod 25 to rotate and fold, and push the clamping block 24 to move toward the inner wall of the bearing inner ring 21. When the spring ring 23 descends, it will also drive the sliding rod 33 to descend, thereby causing the sliding ring 32 to descend. When the sliding ring 32 drives the blocking rod 34 to descend and enter the blocking piston 36, the blocking rod 34 will block the blocking piston 36. At this time, the fixed cylinder 31 is in a sealed state, and the descent of the sliding ring 32 will squeeze the gas in the fixed cylinder 31, causing the gas to generate high pressure. When the clamping block 24 moves, it will drive the gas pipe 35 to move. When the three clamping blocks 24 are initially in contact with the inner wall of the bearing inner ring 21 at the same time, The air supply pipe 35 will separate from the blocking piston 36, and the high-pressure gas will enter the air supply pipe 35, pushing the spring pressure plate 37 down to squeeze the top of the bearing inner ring 21 until the clamping block 24 completely clamps the bearing inner ring 21. At this time, the distance between the laser detector 41 and the bearing inner ring 21 can be adjusted. After the adjustment is completed, the threaded rod 42 is rotated to contact the laser detector 41 to fix the laser detector 41, and then the laser detector 41 is started. At the same time, the motor 11 is started to drive the rotating rod 22 to rotate, and the bearing inner ring 21 is driven to rotate through the clamping block 24, so that the laser detector 41 detects the roundness of the entire circumference of the bearing inner ring 21. When the bearing inner ring 21 is clamped, the clamped position of the bearing inner ring 21 is pressed, which can further constrain the bearing inner ring 21, reduce the movement range of the bearing inner ring 21 during the clamping process, effectively prevent it from being offset during the clamping process, and reduce the error when the bearing inner ring 21 is measured; When the measurement of the inner ring 21 of the bearing is completed, the hydraulic cylinder 14 is retracted to allow the push ring 15 to rise and separate from the spring ring 23. The resilience of the spring ring 23 is released, and the spring ring 23 returns to its original position, driving the clamping block 24 and the connecting rod 1 25 to return to their original positions, so that the gas pipe 35 contacts the blocking piston 36 again, and the sliding ring 32 and the blocking rod 34 also return to their original positions, so that the blocking rod 34 is separated from the blocking piston 36, so that the blocking piston 36 is connected to the fixed cylinder 31 again, and the gas in the gas pipe 35 flows back into the fixed cylinder 31; Secondly, during the continuous descending process of the slide bar 33, the slide bar 33 will contact the connecting plate 51, push the connecting plate 51 down, and make the spring slide bar 52 retract to accumulate resilience. When the connecting plate 51 descends, the seesaw 54 will rotate, making the seesaw 54 tilted, pushing the slide block 55 up, thereby driving the roller 1 56 to rise. When the three clamping blocks 24 initially contact the bearing inner ring 21, the roller 1 56 will also contact the bearing inner ring 21, lifting the bearing inner ring 21 and separating it from the placement ring 12. At the same time, when the slide block 55 rises, it will also drive the connecting rod 2 571 to rotate, so that the connecting rod 2 571 pulls the connecting rod 571 to rotate. The rod 57 moves toward the outer wall of the bearing inner ring 21, driving the spring connecting frame 58 and the second roller 59 to move together, so that the second roller 59 contacts and fits with the outer wall of the bearing inner ring 21, and the bearing inner ring 21 is lifted up by the second roller 59, so as to reduce the friction between the bearing inner ring 21 and the placement ring 12 when the bearing inner ring 21 rotates, and avoid the large friction force affecting the smooth rotation of the bearing inner ring 21. In addition, by squeezing the outer wall of the bearing inner ring 21, it is effectively prevented that there is a gap between the contact surface of the clamping block 24 and the bearing inner ring 21, which may cause slight looseness of the bearing inner ring 21 when the bearing inner ring 21 rotates; Secondly, when the sliding block 55 rises, it will also drive the sliding plate 62 to rise. After the sliding plate 62 moves over the through hole 63, the sliding plate 62 continues to move, which will squeeze the gas in the gas collecting frame 61. At this time, the squeezed gas will be blocked by the spring baffle 65, so the gas pressure will increase. When the sliding plate 62 moves, it will also drive the push rod 66 to move. When the push rod 66 moves to contact the spring baffle 65, the push rod 66 will push the spring baffle 65 to rotate, so that the spring baffle 65 accumulates resilience, and the spring A gap will leak out between the baffle 65 and the jet plate 64, and the high-pressure gas in the gas collecting frame 61 will be ejected through the gap between the spring baffle 65 and the jet plate 64. At this time, the three clamping blocks 24 will initially contact the inner wall of the bearing inner ring 21, and the high-pressure gas will be ejected toward the contact surface between the two. The blowing can form an air film on the contact surface for temporary lubrication, reduce the friction between the contact surfaces, make the clamping block 24 and the bearing inner ring 21 better adapt to each other's surface shape, and make the contact between the contact surfaces of the two more uniform; When the slide rod 33 returns to its original position and separates from the connecting plate 51, the resilience of the spring slide rod 52 will allow the connecting plate 51 to return to its original position, thereby allowing the slide block 55 to return to its original position, allowing the slide plate 62 to return to its original position, allowing the through hole 63 to be connected to the gas collecting frame 61 again for gas replenishment; Secondly, when the sliding plate 62 rises, it will also drive the pushing plate 68 to rise, allowing the pushing plate 68 to contact the rotating block 671, pushing the rotating block 671 to rotate, allowing the side of the rotating block 671 that contacts the pushing plate 68 to rise, and the other side to decrease. The decreased side will squeeze the arc spring 672, allowing the arc spring 672 to accumulate resilience. When the clamping block 24 clamps the bearing inner ring 21, the pushing plate 68 will separate from the rotating block 671, the driving force on the rotating block 671 disappears, and the resilience of the arc spring 672 will be released instantly, pushing the rotating block 671 to rotate quickly, allowing the rotating block 671 to contact the bottom of the clamping block 24, and lightly tapping its bottom, so that the clamping force between the clamping block 24 and the bearing inner ring 21 is released and redistributed to a certain extent, effectively preventing the small contact area between the two, which may cause the clamping force to be too concentrated.

[0034] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A shield machine bearing performance testing device, comprising a support platform (1), a motor (11) fixedly connected to the bottom of the support platform (1), a placement ring (12) fixedly connected to the top of the support platform (1), a fixed plate (13) fixedly connected to the top of the support platform (1), a hydraulic cylinder (14) fixedly connected to the top of the fixed plate (13), and a push ring (15) fixedly connected to the bottom output end of the hydraulic cylinder (14), characterized in that: Also includes: A clamping mechanism (2), the clamping mechanism (2) comprising a bearing inner ring (21), a rotation rod (22) for limiting the clamping of the bearing inner ring (21), a spring ring (23), a clamping block (24), a connecting rod (25), an extrusion component (3) for ensuring the balance of the bearing inner ring (21), and a measuring component (4) for measuring the size of the bearing inner ring (21); The bottom of the bearing inner ring (21) is placed on the top of the placement ring (12), the bottom of the rotating rod (22) is fixedly connected to the top output end of the motor (11), the outer wall of the rotating rod (22) is slidably connected to the inner wall of the spring ring (23), the number of the clamping blocks (24) is three, the number of the connecting rods (25) is six, the inner walls of the three connecting rods (25) located at the bottom are all rotatably connected to the outer wall of the rotating rod (22), the inner walls of the three connecting rods (25) located at the top are all rotatably connected to the outer wall of the spring ring (23), the six connecting rods (25) are arranged in groups of two, and the side walls of the three clamping blocks (24) are all rotatably connected to the inner walls of the three groups of connecting rods (25).

2. A shield machine bearing performance testing device according to claim 1, characterized in that: The extrusion assembly (3) comprises a fixed cylinder (31) fixedly connected to the outer wall of the rotating rod (22); a sliding ring (32) is slidably connected to the inner wall of the fixed cylinder (31); three sliding rods (33) are fixedly connected to the bottom of the spring ring (23); and the outer walls of the three sliding rods (33) are fixedly connected to the inner wall of the spring ring (23).

3. A shield machine bearing performance testing device according to claim 2, characterized in that: The extrusion assembly (3) further comprises three blocking rods (34) fixedly connected to the bottom of the sliding ring (32); the inner walls of the three clamping blocks (24) are fixedly connected to air pipes (35); the outer walls of the three air pipes (35) are slidably connected to the inner wall of the fixed cylinder (31); and the inner wall of the fixed cylinder (31) is fixedly connected to three blocking pistons (36).

4. A shield machine bearing performance testing device according to claim 3, characterized in that: The extrusion assembly (3) further comprises a spring pressure plate (37) slidably connected to the inner wall of the gas pipe (35); the outer walls of the three blocking pistons (36) are slidably connected to the inner walls of the three gas pipes (35); and the outer walls of the three blocking rods (34) are slidably connected to the inner walls of the three blocking pistons (36).

5. A shield machine bearing performance testing device according to claim 4, characterized in that: The measuring assembly (4) comprises a laser detector (41) slidably connected to the inner wall of the fixing plate (13), a threaded rod (42) is threadedly connected to the inner wall of the fixing plate (13), a lifting assembly (5) is arranged on the top of the support platform (1), and a fitting assembly (6) is arranged on the inner wall of the placement ring (12).

6. A shield machine bearing performance testing device according to claim 5, characterized in that: The lifting assembly (5) comprises a connecting plate (51) arranged on the top of the support platform (1); the top of the support platform (1) is fixedly connected to two spring sliding rods (52); the tops of the two spring sliding rods (52) are fixedly connected to the bottom of the connecting plate (51); the top of the support platform (1) is fixedly connected to three fixing frames (53); the inner walls of the three fixing frames (53) are rotatably connected to a seesaw plate (54); The inner wall of the support platform (1) is slidably connected to three sliding blocks (55), the bottoms of the three sliding blocks (55) are slidably connected to the inner walls of the three seesaws (54), and the bottoms of the connecting plates (51) are slidably connected to the inner walls of the three seesaws (54).

7. A shield machine bearing performance testing device according to claim 6, characterized in that: The lifting assembly (5) further comprises a roller 1 (56) rotatably connected to the inner wall of the sliding block (55); three connecting rods (57) are slidably connected to the inner wall of the placement ring (12); the bottoms of the three connecting rods (57) are rotatably connected to connecting rod 2 (571); the inner walls of the three connecting rods 2 (571) are rotatably connected to the side walls of the three sliding blocks (55); The inner walls of the three connecting rods (57) are all slidably connected to spring connecting frames (58), and the inner walls of the three spring connecting frames (58) are all rotatably connected to roller 2 (59).

8. A shield machine bearing performance testing device according to claim 7, characterized in that: The fitting assembly (6) comprises three gas collecting frames (61) fixedly connected to the inner wall of the placement ring (12); the inner walls of the three gas collecting frames (61) are slidably connected to sliding plates (62); the bottoms of the three sliding plates (62) are fixedly connected to the side walls of three sliding blocks (55); and the inner walls of the three gas collecting frames (61) are provided with a plurality of through holes (63).

9. A shield machine bearing performance testing device according to claim 8, characterized in that: The fitting assembly (6) further comprises an air jet plate (64) fixedly connected to the top of the air collecting frame (61), the inner walls of the three air jet plates (64) are rotatably connected to spring baffles (65), the tops of the three sliding plates (62) are fixedly connected to six push rods (66), and the tops of the three air collecting frames (61) are fixedly connected to a second fixing frame (67).

10. A shield machine bearing performance testing device according to claim 9, characterized in that: The fitting assembly (6) further comprises a rotating block (671) rotatably connected to the inner wall of the second fixing frame (67), the side walls of the three rotating blocks (671) are fixedly connected with arc springs (672), the bottoms of the three arc springs (672) are fixedly connected to the tops of the three air collecting frames (61), and the bottoms of the three sliding plates (62) are fixedly connected with push plates (68).

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