A rapid detection device for rock slag compressive strength
Through the combined structure of power columns, brackets, bases and rotating tables, combined with hand-crank wheels, top caps, threaded columns and clamp arms, the problems of low usage efficiency and poor fixing effect of traditional rock slag detection devices are solved, achieving high efficiency , stable rock slag compressive strength detection.
Patent Information
- Application Number
- CN202210730966.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-06-24
- Publication Date
- 2025-01-03
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Traditional rock slag strength detection devices have low efficiency and poor fixation effect on rock slag, especially for strange-shaped rock blocks, which leads to low detection efficiency.
A rapid detection device for compressive strength of rock slag was designed, using a combined structure of power column, bracket, base and rotating table, through hand-crank wheel, top cap, inner cap, threaded column, right-angle gear, rotating boss, threaded arc Blocks and clamping arms and other structures realize efficient conical head extrusion and rock slag fixation. Use transmission gears and right-angle gears to reduce resistance, clamping rock slags and clamping rock slags, adapt to different shapes rock blocks.
It realizes high-efficiency rock slag strength detection, reduces detection time, enhances the fixation effect on rock slag, is suitable for rock blocks of different shapes, and improves the accuracy and stability of detection.
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Figure CN115078117B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of rock detection, in particular to a device for quickly detecting the compressive strength of rock slag. Background Art
[0002] Rock slag is rock fragments produced during construction and tunnel excavation. Rock strength testing equipment can be used to test the strength of these rock fragments, thereby quickly understanding the foundation strength of the construction site or tunnel excavation.
[0003] The traditional slag strength testing device mainly includes the following disadvantages:
[0004] (1) Low efficiency. When the traditional rock slag strength testing device is used to test multiple rock slags, after testing one of the rock slags, the user needs to manually shake the handle to slowly restore the conical arrow, and then place the next rock slag and shake the handle again. The testing efficiency is relatively low.
[0005] (2) The fixing effect of rock slag is poor. Traditional rock slag strength testing devices often place the rock slag directly on the fixed platform at the bottom. When the conical arrow is pressed down, the rock slag will pop out and fly away, especially for some rocks with strange shapes, it is difficult to determine their force points.
[0006] In summary, it is necessary to design a rapid detection device for the compressive strength of slag. Summary of the invention
[0007] 1. Technical issues to be resolved
[0008] In view of the deficiencies in the prior art, the present invention provides a device for quickly detecting the compressive strength of rock slag, which solves the problems of low efficiency and poor fixing effect on rock slag.
[0009] (II) Technical solution
[0010] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a device for rapid detection of rock slag compressive strength, comprising a power column, a bracket, a base and a rotating table, wherein a third groove is provided inside the power column, and a fixing plate and a limiting ring are provided on the inner wall of the third groove from top to bottom, respectively, a top cap is movably provided on the top of the power column, a pressing ring groove is provided inside the top cap, a first spring is provided inside the pressing ring groove, and the bottom end of the first spring is fixedly connected to the top of the power column, a first groove is provided inside the top cap, and an inner groove is provided inside the first groove. A cap, and the bottom end of the inner cap is fixedly connected to the fixing plate, a second groove is opened inside the inner cap, a tension spring is arranged at the top end of the second groove, a threaded column is penetrated inside the power column, the top end of the threaded column penetrates into the inside of the second groove and is fixedly connected to the bottom end of the tension spring, a right-angle gear is rotatably arranged inside the third groove and below the limiting ring, a rotating shaft is penetrated on the right side of the power column, a transmission gear and a hand-cranked wheel are respectively sleeved on the left and right ends of the rotating shaft, the transmission gear is meshed and connected with the right-angle gear, the top end of the right-angle gear and the threaded column are located below the limiting ring. The surface of the column is sleeved with a rotating boss, a fourth groove is provided inside the rotating boss, a threaded arc block is movably provided inside the fourth groove, the inner surface of the threaded arc block is threadedly connected to the threaded column, the threaded arc block includes a first arc block and a second arc block, one side of the first arc block and the second arc block are respectively provided with three limiting columns, a fifth groove is provided inside the rotating boss and located at the outer wall of the limiting column, a third spring is provided inside the fifth groove, and the other end of the third spring is fixedly connected to the limiting column, the left and right ends of the threaded arc block and located at the first arc block and the second arc An inclined groove is provided between the blocks, a push column is provided inside the inclined groove, two push rings are sleeved on the surface of the push column, and the surface of the top ring is in pressure contact with the inner wall of the inclined groove, a reset ring and a second spring are respectively provided inside the rotating boss and on the surface of the push column, and the bottom end of the second spring is fixedly connected to the inner wall of the rotating boss, a movable thin rod is provided at the bottom end of the top cap and inside the third groove, a push ring is sleeved on the bottom end of the movable thin rod and on the surface of the threaded column, and the top end of the push column passes through the inside of the third groove and contacts with the bottom end of the push ring.
[0011] Preferably, a fixing platform is fixedly arranged at the center of the base, a thread groove is provided in the middle area of the fixing platform, and a piezoelectric ceramic sheet is arranged at the bottom end of the fixing platform.
[0012] Preferably, the rotating platform is rotatably connected to the surface of the fixed platform, and four clamping arms are movably provided on the top of the rotating platform, and the clamping arms include a first arm and a second arm.
[0013] Preferably, a rotating column is provided on the outer side of the bottom end of the first arm and the second arm, and the clamping arm is rotatably connected to the rotating platform through the rotating column, and a connecting column is provided in the middle of the clamping arm and between the first arm and the second arm.
[0014] Preferably, a clamping block is movably provided at the top end of the clamping arm, a long spring is provided on the surface of the connecting column, and a sixth groove is provided inside the rotating table.
[0015] Preferably, a threaded ring is movably provided on the inner wall of the sixth groove, and the threaded ring is movably connected to the fixing platform via the threaded groove, and the bottom end of the long spring is fixedly connected to the surface of the threaded ring.
[0016] Preferably, a limiting ring groove is provided on the bottom surface of the fixed platform, and limiting bolts are provided through both left and right sides of the bottom of the rotating platform, and the other end of the limiting bolt is movably connected to the inner wall of the limiting ring groove.
[0017] Preferably, a conical head is provided at the bottom end of the threaded column, limiting grooves are provided on both sides of the threaded column, and the bottom end of the power column and the threaded column are adapted to each other in size and shape.
[0018] Preferably, the bottom end of the bracket is fixedly connected to the base, and the top end of the bracket is fixedly connected to the power column.
[0019] Preferably, a ball groove is provided on the lower surface of the limiting ring and the upper surface of the rotating boss, a plurality of rolling balls are movably arranged inside the ball groove, and the limiting ring and the rotating boss are rotatably connected via the rolling balls.
[0020] (III) Beneficial effects
[0021] The present invention provides a device for quickly detecting the compressive strength of rock slag, which has the following beneficial effects:
[0022] (1) The present invention arranges a hand-cranked wheel, a top cap, an inner cap, a threaded column, a right-angle gear, a rotating boss, a threaded arc block and a top column to cooperate with each other, so that by shaking the hand-cranked wheel, the conical head can be squeezed onto the rock slag through the transmission gear and the right-angle gear and other structures to realize the strength test of the rock slag. After that, pressing the top cap can quickly reset the threaded column under the action of the tension spring, so that the device can efficiently perform strength test on the rock slag.
[0023] (2) The present invention realizes that when the hand-cranked wheel is rotated to drive the rotating boss to rotate, the resistance to the rotation of the rotating boss can be reduced by the action of the rolling ball by setting the coordination of structures such as the limit ring, the rolling ball groove and the rotating boss.
[0024] (3) The present invention cooperates with structures such as a clamping arm, a clamping block, a long spring, a rotating table, a threaded ring and a fixed table. After the rock slag is placed on the fixed table, it is only necessary to rotate the rotating table itself to drive the threaded ring inside it to rotate and move downward, and under the action of the long spring, the clamping arm and the clamping block are pulled to clamp the rock slag. In this way, the clamping arm can not only fix the rock slag, but also adapt to rock slag of different shapes to prevent one side from not being firmly fixed.
[0025] (4) The present invention cooperates with the structures such as the rotating table, the limit bolt and the limit ring groove, so that when the rotating table is placed on the fixed table, the other end of the limit bolt can be clamped in the limit ring groove by connecting the limit bolt, which can prevent the rotating table from falling from the fixed table and ensure that the rotating table can rotate on the fixed table. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 A perspective view of the present invention;
[0027] Figure 2 is a cross-sectional view of the power column structure of the present invention;
[0028] Figure 3 For the present invention Figure 2 A magnified view of the structure at center;
[0029] Figure 4 A top sectional view of the rotating boss structure of the present invention;
[0030] Figure 5 is a cross-sectional view of the rotating table structure of the present invention;
[0031] Figure 6 It is a top sectional view of the turntable structure of the present invention.
[0032] In the figure: 1. power column; 2. bracket; 3. base; 4. rotating table; 5. clamping arm; 6. clamping block; 7. threaded column; 8. conical head; 9. limit groove; 10. hand wheel; 11. rolling ball; 12. top cap; 13. first groove; 14. inner cap; 15. pressing ring groove; 16. first spring; 17. tension spring; 18. second groove; 19. rotating shaft; 20. transmission gear; 21. right-angle gear; 22. fixed plate; 23. movable thin rod; 24. limit ring; 25. third groove; 26. rotating boss ; 27. Inclined groove; 28. Top ring; 29. Second spring; 30. Reset ring; 31. Push column; 32. Push ring; 33. Fourth groove; 34. Threaded arc block; 35. Limit column; 36. Third spring; 37. Fifth groove; 38. Limit bolt; 39. Limit ring groove; 40. Long spring; 41. Fixed platform; 42. Connecting column; 43. Rotating column; 44. Threaded ring; 45. Sixth groove; 501. First arm; 502. Second arm; 3401. First arc block; 3402. Second arc block. DETAILED DESCRIPTION
[0033] 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.
[0034] like Figure 1-6 As shown, the present invention provides a technical solution: a rapid detection device for the compressive strength of slag, including a power column 1, a bracket 2, a base 3 and a rotating table 4, the bottom end of the bracket 2 is fixedly connected to the base 3, the top end of the bracket 2 is fixedly connected to the power column 1, the power column 1, the bracket 2, the base 3 and the rotating table 4 are all made of metal, and the connection method is welding, which can ensure that the structure of the device is firm.
[0035] A third groove 25 is provided inside the power column 1, and a fixing plate 22 and a limiting ring 24 are provided on the inner wall of the third groove 25 from top to bottom, respectively. A top cap 12 is movably provided at the top of the power column 1, and a pressing ring groove 15 is provided inside the top cap 12, and a first spring 16 is provided inside the pressing ring groove 15, and the bottom end of the first spring 16 is fixedly connected to the top of the power column 1. By utilizing the cooperation between the first spring 16 and the top cap 12, after pressing the top cap 12, the top cap 12 can be made to move under the action of the first spring 16. 2 can be restored, the top cap 12 is provided with a first slot 13, the first slot 13 is provided with an inner cap 14, and the bottom end of the inner cap 14 is fixedly connected to the fixing plate 22, the inner cap 14 is provided with a second slot 18, the top end of the second slot 18 is provided with a tension spring 17, the power column 1 is provided with a threaded column 7, the top end of the threaded column 7 is provided with the inside of the second slot 18 and is fixedly connected to the bottom end of the tension spring 17, the threaded column 7 and the tension spring 17 are connected, and the tension spring 17 is connected after the threaded column 7 is lowered. It will be tightened, so as to provide power for the restoration of the threaded column 7. A right-angle gear 21 is rotatably arranged inside the third groove 25 and below the limit ring 24. A rotating shaft 19 is penetrated on the right side of the power column 1. A transmission gear 20 and a hand-cranked wheel 10 are respectively sleeved on the left and right ends of the rotating shaft 19. The transmission gear 20 is meshed and connected with the right-angle gear 21. A rotating boss 26 is sleeved on the top of the right-angle gear 21 and located on the surface of the threaded column 7. When the rotating boss 26 rotates under the drive of the right-angle gear 21, it can To drive the threaded column 7 to move up and down inside the power column 1, ball grooves are provided on the lower surface of the limit ring 24 and the upper surface of the rotating boss 26. A plurality of rolling balls 11 are movably arranged inside the ball grooves, and the limit ring 24 and the rotating boss 26 are rotatably connected through the rolling balls 11. The function of the rolling balls 11 is utilized to effectively reduce the resistance of the rotating boss 26 to its own rotation after rotation. When the hand crank 10 is shaken, the transmission gear 20 is driven to rotate through the rotating shaft 19, thereby driving the right-angle gear 21 to rotate.
[0036] A fourth groove 33 is provided inside the rotating boss 26, and a threaded arc block 34 is movably provided inside the fourth groove 33. The inner surface of the threaded arc block 34 is threadedly connected to the threaded column 7. The threaded arc block 34 is threadedly connected to the threaded column 7, so that when the rotating boss 26 rotates, the threaded arc block 34 can be driven to rotate, thereby realizing the up and down movement of the threaded column 7 in the power column 1. The threaded arc block 34 includes a first arc block 3401 and a second arc block 3402. Three limiting columns 35 are provided on one side of the first arc block 3401 and the second arc block 3402. A fifth groove 37 is provided inside the rotating boss 26 and on the outer wall of the limiting column 35. A third spring 36 is provided inside the fifth groove 37, and the other end of the third spring 36 is connected to the limiting column 35 is fixedly connected, and the third spring 36 is used to ensure that the first arc block 3401 and the second arc block 3402 can always be pressed on the threaded column 7 to prevent the threaded arc block 34 from falling off the threaded column 7. Inclined grooves 27 are provided at the left and right ends of the threaded arc block 34 and between the first arc block 3401 and the second arc block 3402. A push column 31 is provided inside the inclined groove 27. Two push rings 28 are sleeved on the surface of the push column 31, and the surface of the push ring 28 is pressed and contacted with the inner wall of the inclined groove 27. When the push column 31 is in the initial state, the push ring 28 will not be pressed and contacted with the inclined groove 27. After the push column 31 is pressed down, the top ring 28 will squeeze the inclined groove 27 and force the first arc block 3401 and the second arc block 34 to move. 02 is separated from the threaded column 7, a reset ring 30 and a second spring 29 are respectively arranged inside the rotating boss 26 and on the surface of the push column 31, and the bottom end of the second spring 29 is fixedly connected to the inner wall of the rotating boss 26. Through the cooperation of the second spring 29 and the reset ring 30, it is ensured that when the push column 31 is pressed down, it can be restored under the action of the second spring 29. The bottom end of the top cap 12 and the inside of the third groove 25 are provided with a movable thin rod 23, and the bottom end of the movable thin rod 23 and the surface of the threaded column 7 are sleeved with a push ring 32. The top end of the push column 31 penetrates into the inside of the third groove 25 and contacts with the bottom end of the push ring 32. When the top cap 12 is pressed down, the push column 31 can be driven to move forward through the movable thin rod 23 and the push ring 32. When the threaded column 7 moves downward, a conical head 8 is provided at the bottom end of the threaded column 7, and limiting grooves 9 are provided on both sides of the threaded column 7. The size and shape of the bottom end of the power column 1 are adapted to each other. The function of the limiting grooves 9 can ensure that the threaded column 7 can only move up and down. After the right-angle gear 21 is driven to rotate, the threaded arc block 34 will be driven to rotate on the surface of the threaded column 7 through the rotating boss 26, so that the threaded column 7 will move downward. When the top cap 12 is pressed, the top cap 12 will press down the push column 31 through the cooperation of the movable thin rod 23 and the push ring 32. As the push column 31 moves downward and under the action of the top ring 28, the first arc block 3401 and the second arc block 3402 are separated from the threaded column 7. At this time, the threaded column 7 will be reset under the action of the tension spring 17.
[0037] A fixed platform 41 is fixedly arranged at the center of the base 3, a threaded groove is provided in the middle area of the fixed platform 41, a piezoelectric ceramic sheet is arranged at the bottom end of the fixed platform 41, and the pressure exerted on the rock slag during the crushing can be detected by the action of the piezoelectric ceramic sheet. The rotating platform 4 is rotatably connected to the surface of the fixed platform 41, and four clamping arms 5 are movably arranged at the top of the rotating platform 4, and the clamping arms 5 include a first arm 501 and a second arm 502, and a rotating column 43 is arranged on the outer side of the bottom end of each of the first arm 501 and the second arm 502. , and the clamp arm 5 is rotatably connected to the rotating table 4 through a rotating column 43. The rotating column 43 is not connected through the bottom ends of the first arm 501 and the second arm 502, but the bottom ends of the first arm 501 and the second arm 502 each have a rotating column 43 to connect with the rotating table 4. A connecting column 42 is arranged in the middle of the clamp arm 5 and between the first arm 501 and the second arm 502. A clamp block 6 is movably arranged at the top of the clamp arm 5. A long spring 40 is arranged on the surface of the connecting column 42. The first arm 501 and The middle of the second arm 502 is connected with a connecting column 42, and the top of the long spring 40 is connected to the center of the connecting column 42. The long spring 40 will pass through the bottom end of the clamp arm 5 and will not be affected by the rotating column 43. The inside of the rotating table 4 is provided with a sixth groove 45, and the inner wall of the sixth groove 45 is movably provided with a threaded ring 44, and the threaded ring 44 is movably connected to the fixed table 41 through the threaded groove. The bottom end of the long spring 40 is fixedly connected to the surface of the threaded ring 44, and the bottom end surface of the fixed table 41 is provided with a sixth groove 45. A limiting ring groove 39 is provided, and limiting bolts 38 are penetrated on both sides of the left and right sides of the bottom end of the rotating table 4, and the other end of the limiting bolts 38 is movably connected to the inner wall of the limiting ring groove 39. After the rock slag is placed on the top of the fixed table 41, the rotating table 4 is rotated, and the threaded ring 44 inside it will rotate and move downward, thereby pulling the long spring 40 to make the clamping arm 5 move closer to the rock slag and clamp it. Due to the rod supported by the long spring 40, the clamping arm 5 can adapt to rock slag of different shapes and sizes.
[0038] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.
[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A rapid detection device for the compressive strength of rock slag, comprising a power column (1), a bracket (2), a base (3) and a rotating table (4), characterized in that: The power column (1) is provided with a third groove (25) inside, and the inner wall of the third groove (25) is respectively provided with a fixing plate (22) and a limiting ring (24) from top to bottom. The top of the power column (1) is movably provided with a top cap (12), and a pressing ring groove (15) is provided inside the top cap (12), and a first spring (16) is provided inside the pressing ring groove (15), and the bottom end of the first spring (16) is fixedly connected to the top of the power column (1). The top cap (12) is provided with a first groove (13), and an inner cap (14) is provided inside the first groove (13), and the bottom end of the inner cap (14) is fixedly connected to the fixing plate (22). The inner cap (14) is provided with a first groove (13) inside. A second groove (18) is provided, and a tension spring (17) is arranged at the top of the second groove (18). A threaded column (7) is arranged inside the power column (1), and the top of the threaded column (7) passes through the inside of the second groove (18) and is fixedly connected to the bottom of the tension spring (17). A right-angle gear (21) is rotatably arranged inside the third groove (25) and below the limit ring (24). A rotating shaft (19) is arranged on the right side of the power column (1), and a transmission gear (20) and a hand-cranked wheel (10) are respectively sleeved on the left and right ends of the rotating shaft (19). The transmission gear (20) is meshed and connected with the right-angle gear (21). The top of the right-angle gear (21) is sleeved on the surface of the threaded column (7). A rotating boss (26) is provided, a fourth groove (33) is provided inside the rotating boss (26), a threaded arc block (34) is movably provided inside the fourth groove (33), the inner surface of the threaded arc block (34) is threadedly connected to the threaded column (7), the threaded arc block (34) comprises a first arc block (3401) and a second arc block (3402), one side of each of the first arc block (3401) and the second arc block (3402) is provided with three limiting columns (35), a fifth groove (37) is provided inside the rotating boss (26) and located at the outer wall of the limiting column (35), a third spring (36) is provided inside the fifth groove (37), and the other end of the third spring (36) is connected to the limiting column (35). The screw thread arc block (34) is fixedly connected, and an inclined groove (27) is provided at both ends of the left and right sides of the screw thread arc block (34) and between the first arc block (3401) and the second arc block (3402). A push column (31) is provided inside the inclined groove (27). Two push rings (28) are sleeved on the surface of the push column (31), and the surface of the push ring (28) is in pressure contact with the inner wall of the inclined groove (27). A reset ring (30) and a second spring (29) are provided inside the rotating boss (26) and on the surface of the push column (31), and the bottom end of the second spring (29) is fixedly connected to the inner wall of the rotating boss (26). A movable thin rod (23) is provided at the bottom end of the top cap (12) and inside the third groove (25).A push ring (32) is sleeved on the bottom end of the movable thin rod (23) and located on the surface of the threaded column (7), and the top end of the push column (31) penetrates into the inside of the third groove (25) and contacts the bottom end of the push ring (32).
2. A rapid detection device for slag compressive strength according to claim 1, characterized in that: A fixing platform (41) is fixedly arranged at the center of the base (3), a thread groove is provided in the middle area of the fixing platform (41), and a piezoelectric ceramic sheet is arranged at the bottom end of the fixing platform (41).
3. A rapid detection device for slag compressive strength according to claim 2, characterized in that: The rotating platform (4) is rotatably connected to the surface of the fixed platform (41), and four clamping arms (5) are movably provided at the top of the rotating platform (4), and the clamping arms (5) include a first arm (501) and a second arm (502).
4. A rapid detection device for slag compressive strength according to claim 3, characterized in that: A rotating column (43) is provided on the outer sides of the bottom ends of the first arm (501) and the second arm (502), and the clamping arm (5) is rotatably connected to the rotating platform (4) via the rotating column (43). A connecting column (42) is provided in the middle of the clamping arm (5) and between the first arm (501) and the second arm (502).
5. A rapid detection device for slag compressive strength according to claim 4, characterized in that: A clamping block (6) is movably provided at the top end of the clamping arm (5), a long spring (40) is provided on the surface of the connecting column (42), and a sixth groove (45) is provided inside the rotating platform (4).
6. A rapid testing device for slag compressive strength according to claim 5, characterized in that: A threaded ring (44) is movably provided on the inner wall of the sixth groove (45), and the threaded ring (44) is movably connected to the fixing platform (41) through the threaded groove, and the bottom end of the long spring (40) is fixedly connected to the surface of the threaded ring (44).
7. A rapid testing device for slag compressive strength according to claim 6, characterized in that: A limiting ring groove (39) is provided on the bottom surface of the fixed platform (41), and limiting bolts (38) are provided through both left and right sides of the bottom of the rotating platform (4), and the other end of the limiting bolt (38) is movably connected to the inner wall of the limiting ring groove (39).
8. The rapid detection device for rock slag compressive strength according to claim 1 is characterized by: The bottom end of the threaded column (7) is provided with a conical head (8), and both sides of the threaded column (7) are provided with limiting grooves (9), and the bottom end of the power column (1) and the threaded column (7) are adapted to each other in size and shape.
9. A rapid testing device for slag compressive strength according to claim 1, characterized in that: The bottom end of the bracket (2) is fixedly connected to the base (3), and the top end of the bracket (2) is fixedly connected to the power column (1).
10. The rapid detection device for rock slag compressive strength according to claim 1, characterized in that: A ball groove is provided on the lower surface of the limiting ring (24) and the upper surface of the rotating boss (26). A plurality of rolling balls (11) are movably arranged inside the ball groove, and the limiting ring (24) and the rotating boss (26) are rotatably connected via the rolling balls (11).
Citation Information
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Compressive strength detection device for PIR (polyisocyanurate) product
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