A device for testing the strength of a rotary reducer housing

Abstract

This invention relates to the field of rotary reducer testing technology and discloses a device for testing the strength of a rotary reducer housing. The device includes a hydraulic universal testing machine fixed on a fixed base. A feeding plate for placing the housing is slidably disposed on the fixed base. A side platform is disposed on one side of the fixed base, and a lifting seat that moves synchronously with the feeding plate is slidably disposed on the side platform. A first cylinder is rotatably disposed inside the lifting seat, and a second cylinder is connected to the bottom of the first cylinder. An arc-shaped plate is slidably disposed on the outer side of the second cylinder. A grinding disc for grinding the flange connection hole of the housing is disposed on the outer surface of the arc-shaped plate. In this technical solution, when the grinding disc is inserted into the flange connection hole of the housing, the grinding disc can expand outward, making the grinding disc fit against the inner wall of the flange connection hole. Thus, the entire inner wall of the flange connection hole is ground by the rotation of the grinding disc, resulting in higher grinding efficiency.

Description

Technical Field

[0001] This invention relates to the field of rotary reducer testing technology, specifically to a device for testing the strength of a rotary reducer housing. Background Technology

[0002] During the production of rotary reducers, the housing needs to undergo strength testing. Existing strength testing equipment includes hydraulic universal testing machines, which are used to perform compressive strength testing on the housing and measure its ultimate load-bearing capacity. However, when performing compressive strength testing on the rotary reducer housing, the inner walls of the flange connection holes on the housing must be ground smooth. This is because unground hole walls may contain burrs or micro-cracks, which can become stress concentration points under high pressure, leading to housing cracking or fatigue failure, thus affecting the testing results.

[0003] Existing equipment typically uses single-hole grinding when performing pressure tests on the housing of a rotary reducer. Since the grinding disc must be smaller than the inner diameter of the flange connection hole to be inserted into the hole wall, the grinding disc contacts one side of the hole wall first during grinding. This causes the grinding disc to rotate and revolve around the hole wall, thus grinding the hole wall. Therefore, grinding can only be done on one flange connection hole before grinding the other, resulting in slow grinding efficiency and affecting the testing efficiency. Summary of the Invention

[0004] This invention provides a device for testing the strength of a rotary reducer housing. After the grinding disc is inserted into the inner wall of the flange connection hole, it can fit against the hole wall by expanding outward. The grinding disc can complete the grinding process of the hole wall by rotating. This allows for simultaneous grinding of multiple flange connection holes, solving the problem mentioned in the background art where grinding can only be done on one flange connection hole before grinding another, resulting in slow grinding efficiency and affecting the testing efficiency.

[0005] This invention provides the following technical solution: a device for testing the strength of a rotary reducer housing, comprising a hydraulic universal testing machine fixed on a fixed base, a feeding plate for placing the housing slidably disposed on the fixed base, a side platform disposed on one side of the fixed base, a lifting seat slidably disposed on the side platform and moving synchronously with the feeding plate, a first cylinder rotatably disposed inside the lifting seat, a second cylinder connected to the bottom of the first cylinder, an arc-shaped plate slidably disposed on the outer side of the second cylinder, a grinding disc disposed on the outer surface of the arc-shaped plate for grinding the flange connection hole of the housing, a first core rod slidably disposed inside the lifting seat, a transmission assembly for driving the arc-shaped plate to expand outward between the first core rod and the second cylinder, the arc-shaped plate expanding outward to make the grinding disc fit against the inner wall of the flange connection hole.

[0006] As an optional embodiment of the device for testing the strength of a rotary reducer housing according to the present invention, the upper surface of the side platform is provided with a slide rail, a movable column is elastically provided in the slide rail, a lifting column is slidably provided inside the movable column, a connecting plate is fixed between the top of the lifting column and the lifting seat, a first limiting ball is fixed at the bottom end of the lifting column, and a first trajectory groove is opened inside the side platform for the first limiting ball to slide.

[0007] As an optional embodiment of the device for testing the strength of a rotary reducer housing according to the present invention, the side wall of the second cylinder is provided with a rotating groove, a positioning frame is provided in the rotating groove, and a take-up roller for taking in and releasing the grinding disc is elastically provided on the positioning frame.

[0008] As an optional embodiment of the device for testing the strength of a rotary reducer housing according to the present invention, a lifting ring is slidably arranged inside the lifting seat, the top end of the first core rod is rotatably connected to the lifting ring, a lifting rod is fixed on the outer surface of the lifting ring, a second core rod is fixed at the end of the lifting rod, a second limiting ball is fixed at the bottom end of the second core rod, and a second trajectory groove is opened inside the side platform for the second limiting ball to slide.

[0009] As an optional embodiment of the device for testing the strength of a rotary reducer housing according to the present invention, a side plate is fixed to the outer surface of the moving column, an electric push rod is fixed to the side plate, a baffle for contacting the feeding plate is fixed to the output end of the electric push rod, a fixing plate is fixed to the surface of the fixing base, a first servo motor is fixed to the outer surface of the fixing plate, a reciprocating lead screw is fixed to the output end of the first servo motor, the reciprocating lead screw is threadedly connected to the feeding plate, and a guide rail for the feeding plate to slide is fixed on the fixing base.

[0010] As an optional embodiment of the device for testing the strength of a rotary reducer housing according to the present invention, a toothed ring is rotatably provided inside the lifting seat, a first gear that meshes with the toothed ring is fixed on the outer surface of the first cylinder, a second servo motor is fixed inside the lifting seat, and a second gear that meshes with the toothed ring is fixed at the output end of the second servo motor.

[0011] As an optional embodiment of the device for testing the strength of a rotary reducer housing according to the present invention, the transmission assembly includes a helical groove formed on the outer surface of the first core rod, a protruding post fixed on the inner wall of the second cylinder, the protruding post being slidably disposed in the helical groove, a first sliding rod fixed on the inner surface of the arc plate, a first sliding groove for the first sliding rod to slide on the inner wall of the second cylinder, a first sliding protrusion fixed at the end of the first sliding rod, and a first inclined groove for the first sliding protrusion to slide on the inner wall of the first sliding groove.

[0012] As an optional embodiment of the device for testing the strength of a rotary reducer housing according to the present invention, the transmission assembly includes a second slide groove formed on the surface of the first core rod, a second slide rod fixed on the inner surface of the arc plate, the second slide rod being slidably connected to the second slide groove, a second sliding protrusion fixed at the end of the second slide rod, and a second inclined groove formed on the inner wall of the second slide groove for the second sliding protrusion to slide.

[0013] As an optional embodiment of the device for testing the strength of a rotary reducer housing according to the present invention, a rod is fixed to the top of the second cylinder, the rod is slidably connected to the first cylinder, a ring is fixed to the bottom end of the rod, a third sliding groove is provided inside the first cylinder for the ring to slide, a telescopic rod is provided inside the third sliding groove, the lower surface of the ring is slidably connected to the telescopic rod, and a first spring is sleeved on the circumference of the telescopic rod.

[0014] As an optional embodiment of the device for testing the strength of a rotary reducer housing according to the present invention, a third core rod is rotatably arranged inside the lifting seat. The third core rod passes through the lifting ring and the first cylinder and is inserted into the second cylinder. A third sliding rod is fixed on the surface of the positioning frame. A fourth sliding groove is opened on the outer surface of the third core rod for the third sliding rod to slide. A third sliding protrusion is fixed at the end of the third sliding rod. A third inclined groove is opened on the inner wall of the fourth sliding groove for the third sliding protrusion to slide. A slider is fixed at the end of the grinding disc. The slider is slidably arranged inside the arc-shaped plate. A third spring is fixed between the slider and the inner wall of the arc-shaped plate.

[0015] The present invention has the following beneficial effects:

[0016] 1. In this device for testing the strength of a rotary reducer housing, when the lifting seat moves synchronously with the feeding plate, several sets of grinding discs are simultaneously inserted into the corresponding flange connection holes by moving the lifting seat downwards. Then, the second core rod drives the second limit ball to slide along the second track groove, causing the second core rod to drive the first core rod downwards. The first core rod causes the arc plate to expand outwards through the transmission assembly. The arc plate drives the grinding discs to expand outwards, so that the grinding discs fit against the inner wall of the flange connection hole. The rotation of the grinding discs can then perform overall grinding of the hole wall, resulting in better grinding effect. Furthermore, by grinding multiple sets of flange connection holes simultaneously, the grinding efficiency is better, which helps to improve the testing efficiency.

[0017] 2. In this device for testing the strength of a rotary reducer housing, when the grinding disc grinds the inner wall of the flange connection hole, the second core rod slides along the wave-like part of the second track groove, allowing the second core rod to reciprocate up and down. The reciprocating motion of the second core rod drives the first core rod to reciprocate up and down, which in turn pushes the second cylinder to reciprocate up and down. The second cylinder then drives the arc plate and the grinding disc to reciprocate up and down. Thus, the grinding disc can reciprocate up and down while rotating, thereby improving the grinding effect. In addition, the reciprocating motion of the grinding disc facilitates the removal of burrs from the inside of the hole wall, reducing the impact of burrs on the grinding effect.

[0018] 3. In this device for testing the strength of a rotary reducer housing, when the grinding disc reciprocates up and down, the second cylinder reciprocates up and down relative to the third core rod. The second cylinder drives the third slide rod to slide in the fourth slide groove. The third slide rod drives the third sliding protrusion to slide along the third inclined groove, allowing the third slide rod to reciprocate left and right. The reciprocating left and right movement of the third slide rod drives the positioning frame and the winding roller to reciprocate left and right, causing the winding roller to drive the grinding disc to rotate clockwise and counterclockwise along the surface of the arc plate. This allows the straight section and the arc section to alternate positions, thereby changing the position of the grinding disc on the arc plate, increasing the effectiveness of the grinding disc and further improving the grinding effect. At the same time, when the grinding disc reciprocates clockwise and counterclockwise along the arc plate, it causes the grinding disc to have a lateral displacement relative to the inner wall of the flange connection hole, resulting in a better grinding effect. Attached Figure Description

[0019] Figure 1 This is one of the three-dimensional structural schematic diagrams of the present invention.

[0020] Figure 2 This is the second three-dimensional structural schematic diagram of the present invention.

[0021] Figure 3 This is a cross-sectional view of the side platform and lifting seat in this invention.

[0022] Figure 4 This is a schematic diagram of the planar structure of the first and second track grooves in this invention.

[0023] Figure 5 This is a schematic diagram of the internal structure of the lifting seat in this invention.

[0024] Figure 6 For the present invention Figure 5 A schematic diagram of the structure of the grinding disc section.

[0025] Figure 7 This is one of the structural cross-sectional views of the first and second cylindrical sections in this invention.

[0026] Figure 8 For the present invention Figure 7 Enlarged view of point A in the middle.

[0027] Figure 9 This is a schematic diagram of the connection between the protruding post and the spiral groove in this invention.

[0028] Figure 10 This is a top cross-sectional view of the second cylindrical and arc-shaped plate portions in this invention.

[0029] Figure 11 For the present invention Figure 10 Enlarged view of section B in the middle.

[0030] Figure 12 This is a second structural cross-sectional view of the first and second cylindrical sections in this invention.

[0031] Figure 13 For the present invention Figure 12 Enlarged view of point C in the middle.

[0032] Figure 14 This is a schematic diagram of another technical solution for the transmission component in this invention.

[0033] Figure 15 For the present invention Figure 14 Enlarged view of point D in the middle.

[0034] In the diagram: 1. Fixed base; 2. Hydraulic universal testing machine; 3. Shell; 301. Flange connection hole; 4. Feeding plate; 5. Side platform; 6. Lifting seat; 7. First cylinder; 8. Second cylinder; 9. Arc plate; 10. Grinding disc; 101. Straight section; 102. Arc section; 11. First core rod; 12. Transmission assembly; 1211. Spiral groove; 1212. Protruding column; 1213. First sliding rod; 1214. First sliding groove; 1215. First sliding... 1216. Protrusion; 1221. First inclined groove; 1222. Second sliding groove; 1223. Second sliding rod; 1224. Second inclined groove; 13. Slide rail; 14. Moving column; 15. Lifting column; 16. Connecting plate; 17. First limiting ball; 18. First trajectory groove; 181. First descending part; 182. First horizontal part; 183. First rising part; 19. Rotating groove; 20. Positioning frame; 21. Take-up roller; 22. Lifting 23. Second core rod; 24. Second limiting ball; 25. Second track groove; 251. Second descending section; 252. Third descending section; 253. Wave section; 2531. Fourth descending section; 2532. Fourth ascending section; 254. Second ascending section; 255. Third ascending section; 26. Side plate; 27. Electric push rod; 28. Baffle; 29. ​​Fixing plate; 30. First servo motor; 31. Reciprocating lead screw; 32. Guide rail; 33. Gear ring; 34. 35. First gear; 36. Second servo motor; 37. Second gear; 38. Insert rod; 39. Ring plate; 40. Third slide groove; 41. Telescopic rod; 42. First spring; 43. Third core rod; 44. Third slide rod; 45. Fourth slide groove; 46. Third sliding protrusion; 47. Third tilting groove; 48. Fixing component; 49. Second spring; 50. Limiting groove; 51. Limiting rod; 52. Moving groove; 53. Slider; 54. Third spring; 55. Lifting ring. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Example 1, please refer to Figures 1-15A device for testing the strength of a rotary reducer housing includes a hydraulic universal testing machine 2 fixed on a fixed base 1. A feeding plate 4 for placing the housing 3 is slidably arranged on the fixed base 1. A side platform 5 is arranged on one side of the fixed base 1. A lifting seat 6 that moves synchronously with the feeding plate 4 is slidably arranged on the side platform 5. A first cylinder 7 is rotatably arranged inside the lifting seat 6. A second cylinder 8 is connected to the bottom of the first cylinder 7. An arc plate 9 is slidably arranged on the outside of the second cylinder 8. A grinding disc 10 for grinding the flange connection hole 301 of the housing 3 is arranged on the outer surface of the arc plate 9. A first core rod 11 is slidably arranged inside the lifting seat 6. A transmission assembly 12 for driving the arc plate 9 to expand outward is arranged between the first core rod 11 and the second cylinder 8. The arc plate 9 expands outward so that the grinding disc 10 fits against the inner wall of the flange connection hole 301.

[0037] The upper surface of the side platform 5 is provided with a slide rail 13, a movable column 14 is elastically provided in the slide rail 13, a lifting column 15 is slidably provided inside the movable column 14, a connecting plate 16 is fixed between the top of the lifting column 15 and the lifting seat 6, a first limiting ball 17 is fixed at the bottom end of the lifting column 15, and a first track groove 18 is opened inside the side platform 5 for the first limiting ball 17 to slide.

[0038] The second cylinder 8 has a rotating groove 19 on its side wall, and a positioning frame 20 is provided in the rotating groove 19. A winding roller 21 for winding and unwinding the grinding disc 10 is elastically provided on the positioning frame 20.

[0039] The lifting seat 6 has a lifting ring 54 that slides inside. The top end of the first core rod 11 is rotatably connected to the lifting ring 54. The outer surface of the lifting ring 54 is fixed with a lifting rod 22. The end of the lifting rod 22 is fixed with a second core rod 23. The bottom end of the second core rod 23 is fixed with a second limiting ball 24. The side platform 5 has a second track groove 25 for the second limiting ball 24 to slide inside.

[0040] A side plate 26 is fixed to the outer surface of the movable column 14. An electric push rod 27 is fixed to the side plate 26. A baffle 28 for contacting the feeding plate 4 is fixed to the output end of the electric push rod 27. A fixing plate 29 is fixed to the surface of the fixed base 1. A first servo motor 30 is fixed to the outer surface of the fixing plate 29. A reciprocating screw 31 is fixed to the output end of the first servo motor 30. The reciprocating screw 31 is threadedly connected to the feeding plate 4. A guide rail 32 for the feeding plate 4 to slide is fixed to the fixed base 1.

[0041] The lifting seat 6 is internally equipped with a toothed ring 33, and the outer surface of the first cylinder 7 is fixed with a first gear 34 that meshes with the toothed ring 33. The lifting seat 6 is internally equipped with a second servo motor 35, and the output end of the second servo motor 35 is fixed with a second gear 36 that meshes with the toothed ring 33.

[0042] The transmission assembly 12 includes a spiral groove 1211 formed on the outer surface of the first core rod 11, a protrusion 1212 fixed on the inner wall of the second cylinder 8, the protrusion 1212 being slidably disposed in the spiral groove 1211, a first slide rod 1213 fixed on the inner surface of the arc plate 9, a first slide groove 1214 formed on the inner wall of the second cylinder 8 for the first slide rod 1213 to slide, a first sliding protrusion 1215 fixed at the end of the first slide rod 1213, and a first inclined groove 1216 formed on the inner wall of the first slide groove 1214 for the first sliding protrusion 1215 to slide.

[0043] In this technical solution, a fixing element 47 is provided on the feeding plate 4. The fixing element 47 can be a chuck, used to fix the housing 3. The housing 3 of the rotary reducer has a circular wheel structure with several flange connection holes 301. The hydraulic universal testing machine 2 is used to perform compressive strength testing on the housing 3. Both the fixing element 47 and the hydraulic universal testing machine 2 are existing technologies and are not innovative points of this application, so they will not be described in detail. When testing the housing 3 of the rotary reducer, the housing 3 is first placed on the feeding plate 4. A second spring 48 is fixed between the inside of the side platform 5 and the moving column 14. Figure 1 and Figure 2 The first servo motor 30 is started, causing the reciprocating screw 31 to rotate. The reciprocating screw 31 drives the feeding plate 4 to move to the right. At this time, due to the abutment between the baffle 28 and the feeding plate 4, the feeding plate 4 drives the baffle 28 to move to the right synchronously. The baffle 28 drives the moving column 14 to move to the right along the slide rail 13, while compressing the second spring 48, causing the second spring 48 to store force. When the moving column 14 slides to the right along the slide rail 13, the moving column 14 drives the lifting column 15 to move. The lifting column 15 drives the first limit ball 17 to slide along the first track groove 18. The first track groove 18 includes a first descending part 181, a first horizontal part 182 and a first rising part 183 connected in series. First, the first limiting ball 17 slides along the first descending part 181, so that the first limiting ball 17 drives the lifting column 15 to move downward. The lifting column 15 moves downward, which drives the connecting plate 16 to move downward. The connecting plate 16 moves downward, which drives the lifting seat 6 to move downward. The lifting seat 6 moves downward, which drives the first cylinder 7, the second cylinder 8, the arc plate 9 and the grinding disc 10 to move downward synchronously until the grinding disc 10 is inserted into the flange connection hole 301 of the housing 3.

[0044] When the moving column 14 moves to the right, the second core rod 23 also moves to the right. The second core rod 23 drives the second limiting ball 24 to slide inside the second track groove 25. The second track groove 25 includes a second descending part 251, a third descending part 252, a wave part 253, a second rising part 254, and a third rising part 255 that are connected together. The second descending part 251 and the first descending part 181 have the same trajectory, so that when the second limiting ball 24 slides along the second descending part 251, the relative position of the second core rod 23 and the lifting column 15 remains unchanged. Then, when the first limiting ball 17 slides along the second descending part 251, the second core rod 23 moves to the right. When the horizontal part 182 slides, the second limiting ball 24 slides along the third descending part 252, causing the second core rod 23 to move downward relative to the lifting column 15. The downward movement of the second core rod 23 drives the lifting rod 22 to move downward, which in turn drives the lifting ring 54 to move downward. The lifting ring 54 then drives the first core rod 11 to move downward, causing the first core rod 11 to slide downward. This downward movement of the first core rod 11 causes the protrusion 1212 to slide along the spiral groove 1211, resulting in the protrusion 1212 causing the second cylinder 8 to rotate clockwise relative to the first cylinder 7 by a certain angle. When the second cylinder 8 rotates clockwise by a certain angle, as... Figure 10 and Figure 11 As shown, the first slide rod 1213 slides along the first slide groove 1214, and the first slide rod 1213 drives the first sliding protrusion 1215 to slide along the first inclined groove 1216, so that the first slide rod 1213 pushes the arc plate 9 to move to the outside of the second cylinder 8, so that the arc plate 9 expands outward. At this time, the outward expansion of the arc plate 9 will pull the grinding disc 10, causing the take-up roller 21 to unwind the grinding disc 10 until the grinding disc 10 is unwound and can no longer be unwound. The end of the grinding disc 10 is fixed to the take-up roller 21. At this time, the outer surface of the grinding disc 10 expands to contact the inner wall of the flange connection hole 301.

[0045] Then, as the lifting seat 6 continues to move synchronously to the right with the feeding plate 4, the second servo motor 35 rotates, driving the second gear 36 to rotate. The second gear 36 drives the gear ring 33 to rotate, which in turn drives the first gear 34 to rotate. The first gear 34 drives the second cylinder 8 to rotate, which in turn drives the first cylinder 7 to rotate. The first cylinder 7 drives the arc plate 9 to rotate, which in turn drives the grinding disc 10 to rotate. This causes the grinding disc 10 to grind the inner wall of the flange connection hole 301. After grinding, the second limiting ball 24 slides along the second rising part 254 and the third rising part 255, causing the grinding disc 10 to reset. The first limiting ball 17 slides along the first rising part 183, causing... The grinding disc 10 moves out of the flange connection hole 301, and then the electric push rod 27 drives the baffle 28 to retract, so that the baffle 28 moves away from the side of the feeding plate 4, releasing the contact state between the baffle 28 and the feeding plate 4. Then the second spring 48 releases the force, so that the moving column 14 drives the lifting seat 6 to reset. The feeding plate 4 continues to move to the right to the testing position of the hydraulic universal testing machine 2. The hydraulic universal testing machine 2 applies pressure to the shell 3 to complete the pressure resistance test of the shell 3. After the test is completed, the shell 3 is unloaded. The reciprocating screw 31 drives the feeding plate 4 to reset. After the feeding plate 4 is reset, the electric push rod 27 pushes the baffle 28 to reset. The baffle 28 and the feeding plate 4 contact again to perform the next test of the shell 3.

[0046] In this technical solution, a limiting groove 49 is formed on the lower surface of the first cylinder 7, and a limiting rod 50 is fixed to the top of the arc plate 9. The limiting rod 50 is slidably disposed in the limiting groove 49, so that when the second cylinder 8 rotates relative to the first cylinder 7 at a certain angle, it will not drive the arc plate 9 to rotate, so that the arc plate 9 can only perform outward expansion action, and the limiting rod 50 can only slide horizontally inside the limiting groove 49, so that when the first cylinder 7 rotates, it can drive the second cylinder 8 and the arc plate 9 to rotate synchronously. In addition, the first core rod 11 can only be relatively The first cylinder 7 and the second cylinder 8 slide up and down, so that when the first cylinder 7 rotates, it will also drive the first core rod 11 to rotate synchronously, thereby keeping the grinding disc 10 in an expanded state. A torsion spring is provided between the positioning frame 20 and the winding roller 21. One end of the torsion spring is fixed to the inner wall of the positioning frame 20, and the other end of the torsion spring is fixed to the winding roller 21. When the winding roller 21 unwinds the grinding disc 10, the torsion spring stores force. When the arc plate 9 contracts inward, the torsion spring releases force, causing the winding roller 21 to reverse and wind up the grinding disc 10.

[0047] In this technical solution, the number of grinding discs 10 corresponds to the number of flange connection holes 301 on the housing 3, so that multiple sets of flange connection holes 301 on the housing 3 can be ground at the same time, resulting in higher grinding efficiency.

[0048] Example 2: This example presents another technical solution for the transmission assembly 12. For details, please refer to [link / reference needed]. Figures 1-15 The transmission assembly 12 includes a second slide groove 1221 formed on the surface of the first core rod 11, a second slide rod 1222 fixed on the inner surface of the arc plate 9, the second slide rod 1222 being slidably connected to the second slide groove 1221, a second sliding protrusion 1223 fixed at the end of the second slide rod 1222, and a second inclined groove 1224 for the second sliding protrusion 1223 to slide on the inner wall of the second slide groove 1221.

[0049] In this technical solution, such as Figure 14 and Figure 15 As shown, when the lifting ring 54 moves downward, it drives the first core rod 11 to move downward. The first core rod 11 moves downward, causing the second slide rod 1222 to slide upward along the second slide groove 1221. The second slide rod 1222 drives the second sliding protrusion 1223 to slide along the third inclined groove 46, causing the second sliding protrusion 1223 to drive the second slide rod 1222 to extend out of the second cylinder 8. The second slide rod 1222 drives the arc plate 9 to move, causing the arc plate 9 to expand outward. The arc plate 9 drives the grinding disc 10 to expand outward.

[0050] In this technical solution, the connections between the first core rod 11, the second cylinder 8, and the first cylinder 7 do not involve relative rotation, so that when the first cylinder 7 rotates, it can drive the second cylinder 8 and the first core rod 11 to rotate synchronously, thus not affecting the grinding work of the grinding disc 10.

[0051] In Example 3, because the relative position of the grinding disc 10 to the flange connection hole 301 remains unchanged during grinding, the grinding disc 10 cannot fully contact the inner wall of the flange connection hole 301. Simultaneously, the burrs produced cannot be effectively discharged from the flange connection hole 301, resulting in poor grinding performance. To address this problem, this example is an improvement based on Examples 1 and 2. For details, please refer to... Figures 1-15 The top of the second cylinder 8 is fixed with a rod 37, which is slidably connected to the first cylinder 7. The bottom end of the rod 37 is fixed with a ring plate 38. The inside of the first cylinder 7 is provided with a third sliding groove 39 for the ring plate 38 to slide. The inside of the third sliding groove 39 is provided with a telescopic rod 40. The lower surface of the ring plate 38 is slidably connected to the telescopic rod 40, and a first spring 41 is sleeved on the circumference of the telescopic rod 40.

[0052] In this technical solution, when the grinding disc 10 rotates to grind the inner wall of the flange connection hole 301, the first limiting ball 17 slides along the first horizontal part 182 of the first track groove 18, and the second limiting ball 24 slides along the wave part 253 of the second track groove 25. This causes the second limiting ball 24 to drive the second core rod 23 to reciprocate up and down, which in turn causes the second core rod 23 to drive the lifting ring 54 to reciprocate up and down relative to the lifting seat 6. First, the second limiting ball 24 slides along the second descending part 251. During sliding, the second cylinder 8 has a sliding groove 51 inside for the first core rod 11 to slide. The first core rod 11 slides downward inside the sliding groove 51, driving the grinding disc 10 to expand outward through the transmission assembly 12. After the grinding disc 10 expands, the first core rod 11 slides to the bottom of the sliding groove 51, causing the first core rod 11 to abut against the sliding groove 51. When the second limiting ball 24 slides along the wave portion 253, the wave portion 253 includes a fourth descending portion 2531 and a fourth ascending portion 253. 2. First, the second limiting ball 24 slides along the fourth descending part 2531, causing the first core rod 11 to continue moving downward. Since the first core rod 11 is in contact with the bottom wall of the moving groove 51, the first core rod 11 will drive the second cylinder 8 to move downward when it moves downward. The second cylinder 8 drives the insertion rod 37 to move downward, and the insertion rod 37 drives the ring plate 38 to move downward. The ring plate 38 compresses the first spring 41, causing the first spring 41 to store force. At the same time, the second cylinder 8 moves downward, driving the arc plate 9 to move downward. The arc plate 9 drives the grinding disc 10 to move downward. When the second limiting ball 24 slides along the fourth rising part 2532, the first spring 41 releases force, causing the second cylinder 8 to reset, thereby causing the grinding disc 10 to move upward and reset. Through the above process, when the grinding disc 10 rotates to grind the inner wall of the flange connection hole 301, the second limiting ball 24 slides along the wave part 253, allowing the grinding disc 10 to move up and down reciprocatingly, resulting in a better grinding effect and making it easier to remove burrs.

[0053] The telescopic rod 40 includes an inner rod and an outer rod. The inner rod can slide relative to the outer rod. The lower surface of the ring plate 38 is slidably connected to the inner rod, and the top end of the first spring 41 is fixed to the outer surface of the inner rod. When the first spring 41 is compressed, the inner rod retracts into the outer rod. When the first spring 41 returns to its original position, the inner rod slides out from the outer rod, thereby realizing the telescopic function. Through the setting of the telescopic rod 40, the first spring 41 can only move in the up and down direction.

[0054] In this technical solution, the third slide groove 39 is set as a circular groove, and several sets of first springs 41 are arranged along the circumference of the third slide groove 39. The several sets of first springs 41 can increase the stability and accuracy of the upward reset movement of the ring plate 38, so as not to affect the up-down reciprocating movement of the second cylinder 8.

[0055] In Example 4, because the grinding disc 10 expands outward through the arc-shaped plate 9, the grinding disc 10 is only arc-shaped in the part that contacts the arc-shaped plate 9, allowing it to contact the inside of the flange connection hole 301. However, in the area between adjacent arc-shaped plates 9, the grinding disc 10 is pulled and becomes straight, preventing this part of the grinding disc 10 from contacting the inner wall of the flange connection hole 301. This reduces the effectiveness of the grinding disc 10 and thus the grinding effect. To address this problem, this example is an improvement based on Example 3. For details, please refer to Example 3. Figures 1-15 The lifting seat 6 has a third core rod 42 rotatably mounted inside. The third core rod 42 passes through the lifting ring 54 and the first cylinder 7 and is inserted into the second cylinder 8. The surface of the positioning frame 20 is fixed with a third slide rod 43. The outer surface of the third core rod 42 is provided with a fourth slide groove 44 for the third slide rod 43 to slide. The end of the third slide rod 43 is fixed with a third sliding protrusion 45. The inner wall of the fourth slide groove 44 is provided with a third inclined groove 46 for the third sliding protrusion 45 to slide. The end of the grinding disc 10 is fixed with a slider 52. The slider 52 is slidably mounted inside the arc plate 9. A third spring 53 is fixed between the slider 52 and the inner wall of the arc plate 9.

[0056] In this technical solution, when the second cylinder 8 reciprocates up and down, the second cylinder 8 reciprocates up and down relative to the third core rod 42, such as... Figure 12 and Figure 13 As shown, when the second cylinder 8 moves downward relative to the third core rod 42, the second cylinder 8 drives the third sliding rod 43 to move downward along the fourth sliding groove 44. The third sliding groove 39 drives the third sliding protrusion 45 to move downward along the third inclined groove 46, causing the third sliding protrusion 45 to drive the third sliding rod 43 to move to the right. The rightward movement of the third sliding rod 43 drives the positioning frame 20 to move to the right. Figure 11As shown, the positioning frame 20 moves to the right, causing the take-up roller 21 to move to the right within the rotating groove 19. Since the take-up roller 21 has completely unwound the grinding disc 10 at this time, the rightward movement of the take-up roller 21 pulls the grinding disc 10 connected to the take-up roller 21 to move to the right, thereby causing the grinding disc 10 to move clockwise along the arc plate 9. The end of the arc plate 9 causes the slider 52 to slide along the arc plate 9, compressing the third spring 53 and storing force. When the grinding disc 10 moves clockwise along the arc plate 9, the straight section 101 on the grinding disc 10 moves to the arc section 102; when the second cylinder 8... When the third core rod 42 moves upward, the third slide rod 43 returns to its original position to the left, causing the positioning frame 20 and the take-up roller 21 to return to their original positions to the left. The third spring 53 releases the force, causing the grinding disc 10 to move counterclockwise. This allows the straight section 101 and the curved section 102 of the grinding disc 10 to alternate positions, thereby increasing the effectiveness of the grinding disc 10 and further improving the grinding effect. At the same time, the grinding disc 10 moves clockwise and counterclockwise along the curved plate 9, causing the grinding disc 10 to have a lateral displacement relative to the inner wall of the flange connection hole 301, resulting in a better grinding effect.

[0057] In this technical solution, when the grinding disc 10 grinds the inner wall of the flange connection hole 301, the grinding disc 10 rotates clockwise, and the inner wall of the flange connection hole 301 provides a counterclockwise force to the grinding disc 10. Figure 10 and Figure 11 As shown, grinding disc 10 cannot be pressed. Figure 10 The grinding disc 10 rotates counterclockwise to increase its stability during grinding. When the grinding disc 10 is pulled and rotates clockwise relative to the arc plate 9, a counterclockwise force is provided to the grinding disc 10 through the third spring 53 and the inner wall of the flange connection hole 301 when the grinding disc 10 is reset, so that the grinding disc 10 can be stably reset. The slider 52 will not slide out of the arc plate 9, but will only slide along the arc plate 9, which can prevent the grinding disc 10 from falling off.

[0058] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0059] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A device for testing the strength of a rotary reducer housing, comprising a hydraulic universal testing machine (2) fixed on a fixed base (1), wherein a feeding plate (4) for placing a housing (3) is slidably disposed on the fixed base (1), characterized in that: A side platform (5) is provided on one side of the fixed base (1). A lifting seat (6) that moves synchronously with the feeding plate (4) is slidably provided on the side platform (5). A first cylinder (7) is rotatably provided inside the lifting seat (6). A second cylinder (8) is connected to the bottom of the first cylinder (7). An arc plate (9) is slidably provided on the outer side of the second cylinder (8). A grinding disc (10) for grinding the flange connection hole (301) of the housing (3) is provided on the outer surface of the arc plate (9). A first core rod (11) is slidably provided inside the lifting seat (6). A transmission component (12) for driving the arc plate (9) to expand outward is provided between the first core rod (11) and the second cylinder (8). The arc plate (9) expands outward so that the grinding disc (10) fits against the inner wall of the flange connection hole (301). The upper surface of the side platform (5) is provided with a slide rail (13), a movable column (14) is elastically provided in the slide rail (13), a lifting column (15) is slidably provided inside the movable column (14), a connecting plate (16) is fixed between the top of the lifting column (15) and the lifting seat (6), a first limiting ball (17) is fixed at the bottom end of the lifting column (15), and a first track groove (18) for the first limiting ball (17) to slide is opened inside the side platform (5); The first trajectory groove (18) includes a first descending part (181), a first horizontal part (182), and a first ascending part (183) that are connected together; The second cylinder (8) has a rotating groove (19) on its side wall. A positioning frame (20) is provided in the rotating groove (19). A winding roller (21) for winding and unwinding the grinding disc (10) is elastically provided on the positioning frame (20). The lifting seat (6) is slidably provided with a lifting ring (54). The top end of the first core rod (11) is rotatably connected to the lifting ring (54). A lifting rod (22) is fixed on the outer surface of the lifting ring (54). A second core rod (23) is fixed at the end of the lifting rod (22). A second limiting ball (24) is fixed at the bottom end of the second core rod (23). A second track groove (25) is opened inside the side platform (5) for the second limiting ball (24) to slide. The second trajectory groove (25) includes a second descending section (251), a third descending section (252), a wave section (253), a second ascending section (254), and a third ascending section (255) connected together.

2. The device for testing the strength of a rotary reducer housing according to claim 1, characterized in that: A side plate (26) is fixed to the outer surface of the movable column (14), an electric push rod (27) is fixed to the side plate (26), a baffle (28) for contacting the feeding plate (4) is fixed to the output end of the electric push rod (27), a fixing plate (29) is fixed to the surface of the fixed base (1), a first servo motor (30) is fixed to the outer surface of the fixing plate (29), a reciprocating screw (31) is fixed to the output end of the first servo motor (30), the reciprocating screw (31) is threaded to the feeding plate (4), and a guide rail (32) for the feeding plate (4) to slide is fixed to the fixed base (1).

3. The device for testing the strength of a rotary reducer housing according to claim 1, characterized in that: The lifting seat (6) is rotatably provided with a toothed ring (33), and the outer surface of the first cylinder (7) is fixed with a first gear (34) that meshes with the toothed ring (33). The lifting seat (6) is fixed with a second servo motor (35), and the output end of the second servo motor (35) is fixed with a second gear (36) that meshes with the toothed ring (33).

4. The device for testing the strength of a rotary reducer housing according to claim 1, characterized in that: The transmission assembly (12) includes a spiral groove (1211) formed on the outer surface of the first core rod (11), a protrusion (1212) fixed on the inner wall of the second cylinder (8), the protrusion (1212) being slidably disposed in the spiral groove (1211), a first slide rod (1213) fixed on the inner surface of the arc plate (9), a first slide groove (1214) for sliding the first slide rod (1213) being formed on the inner wall of the second cylinder (8), a first sliding protrusion (1215) fixed at the end of the first slide rod (1213), and a first inclined groove (1216) for sliding the first sliding protrusion (1215) being formed on the inner wall of the first slide groove (1214).

5. The device for testing the strength of a rotary reducer housing according to claim 1, characterized in that: The transmission assembly (12) includes a second slide groove (1221) formed on the surface of the first core rod (11), a second slide rod (1222) fixed on the inner surface of the arc plate (9), the second slide rod (1222) being slidably connected to the second slide groove (1221), a second sliding protrusion (1223) fixed at the end of the second slide rod (1222), and a second inclined groove (1224) formed on the inner wall of the second slide groove (1221) for the second sliding protrusion (1223) to slide.

6. The device for testing the strength of a rotary reducer housing according to claim 1, characterized in that: The top of the second cylinder (8) is fixed with a rod (37), which is slidably connected to the first cylinder (7). The bottom end of the rod (37) is fixed with a ring piece (38). The first cylinder (7) has a third groove (39) for sliding the ring piece (38). The third groove (39) is provided with a telescopic rod (40). The lower surface of the ring piece (38) is slidably connected to the telescopic rod (40), and a first spring (41) is sleeved on the circumference of the telescopic rod (40).

7. The device for testing the strength of a rotary reducer housing according to claim 6, characterized in that: The lifting seat (6) is rotatably provided with a third core rod (42). The third core rod (42) passes through the lifting ring (54) and the first cylinder (7) and is inserted into the second cylinder (8). The surface of the positioning frame (20) is fixed with a third slide rod (43). The outer surface of the third core rod (42) is provided with a fourth slide groove (44) for the third slide rod (43) to slide. The end of the third slide rod (43) is fixed with a third sliding protrusion (45). The inner wall of the fourth slide groove (44) is provided with a third inclined groove (46) for the third sliding protrusion (45) to slide. The end of the grinding disc (10) is fixed with a slider (52). The slider (52) is slidably disposed inside the arc plate (9). A third spring (53) is fixed between the slider (52) and the inner wall of the arc plate (9).

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