A drum-type stone screen for a skid loader

Abstract

The present invention discloses a drum-type stone screen for a skid loader, belonging to the technical field of drum-type stone screens. A drum-type stone screen for a skid loader comprises a base frame and corresponding frame plates fixedly mounted on its surface, a rotatable stone screen device is provided between the two frame plates, a fixed disc is fixedly mounted on one end surface of the stone screen device, an inner screen cylinder is fixedly mounted on the side of the fixed disc, a rotatable outer screen cylinder is provided between the stone screen device and the inner screen cylinder, the inner side surface of the outer screen cylinder contacts the outer surface of the inner screen cylinder, and a rotation groove is provided on the inner side surface of the fixed disc. Compared with traditional drum-type stone screens, the drum-type stone screen for a skid loader can complete the screening of sand and gravel of different specifications without the need to replace the screen separately, and the outer screen hole and the inner screen hole on the surface of the inner screen cylinder are more convenient and quick to adjust the screen hole, thereby improving the screening efficiency of sand and gravel.

Description

Technical Field

[0001] The present invention relates to the technical field of drum-type stone screeners, and more particularly to a drum-type stone screener for a skid loader. Background Art

[0002] The drum stone screen is a device that screens materials by rotating the drum. It is widely used in sandstone, mining, coal and other industries. The stone drum screen consists of five parts: drum, frame, funnel, reducer and motor. After the crushed stone enters the drum, it is screened as the drum rotates. The material is screened by the centrifugal force of the drum rotation and the jigging effect.

[0003] Chinese patent application number CN201921444598.8 discloses a drum-type stone screen for a skid loader, comprising a screen rod, a first fixed ring, a second fixed ring and a fixed plate. A plurality of impact assemblies are installed at equal intervals on the surface of the screen rod, and the impact assembly includes a fixed block, an impact bullet block and a telescopic spring. A movable groove for embedding the end of the impact bullet block is provided in the fixed block. One end of the impact bullet block can be reciprocatingly embedded in the movable groove, and the other end extends out of the movable groove. The telescopic spring is distributed between the embedded end face of the impact bullet block and the bottom of the movable groove.

[0004] The above technical solution uses the transmission shaft of the skid loader to drive the stone screen to rotate for screening. It has a simple and practical structure, is easy to move, and has a small size. Through the impact component, if the stone is large, it can properly buffer the impact force of the stone on the screen rod, which is conducive to efficiently screening out stones in the soil and improving the service life of the device. The mainstream drum stone screens on the market currently have the problem of single function. Their screening effect depends on the screen with a fixed aperture, and can only screen out sand and gravel particles of a single specification. When production needs involve sand and gravel of various particle sizes, traditional equipment needs to replace screens with different apertures or enable multiple devices to work in series to achieve grading. This process has significant limitations, and when replacing the corresponding screen, manual shutdown is required to replace the screen. The replacement steps are cumbersome and time-consuming, which affects the screening efficiency of sand and gravel. Summary of the Invention

[0005] The object of the present invention is to provide a drum-type stone screen for a skid steer loader to solve the problems raised in the above background technology:

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A drum-type stone screen for a skid loader comprises a base frame and corresponding frame plates fixedly mounted on the surface thereof, a rotatable stone screen device is arranged between the two frame plates, a fixed disc is fixedly mounted on one end surface of the stone screen device, an inner screen drum is fixedly mounted on the side of the fixed disc, a rotatable outer screen drum is arranged between the stone screen device and the inner screen drum, the inner side surface of the outer screen drum contacts the outer surface of the inner screen drum, a rotating groove is opened on the inner side surface of the fixed disc, a plurality of arc-shaped rotating blocks matching the rotating groove are fixedly mounted on one end surface of the outer screen drum, and the outer screen drum rotates through the arc The rotating block and the rotating groove match each other and are rotatably connected to the fixed disk. The outer sieve drum and the inner sieve drum can rotate synchronously. The outer sieve drum can also rotate alone and then rotate synchronously with the inner sieve drum. A gear ring is fixedly installed on the other end surface of the screening stone equipment. The inner wall of the gear ring is provided with an annular groove. A plurality of arc-shaped blocks matching the annular groove are fixedly installed on the end surface of the outer sieve drum. The outer sieve drum is rotatably connected to the gear ring through the matching arc blocks and the annular groove. A plurality of through-type inner sieve holes are provided on the surface of the inner sieve drum, and a plurality of through-type outer sieve holes are provided on the surface of the outer sieve drum.

[0008] By adopting the above technical solution, the threaded rod is rotated and unscrewed from the inside of the fixed screw barrel, and the movement of the threaded rod drives the ball to squeeze the second gear. At this time, the second gear drives the spline rod to slide out of the spline barrel. When the second gear moves and disengages from the gear ring, the motor rotates and drives the rotating shaft to rotate, so that the first gear rotates and drives the gear ring to rotate, and the gear ring rotates and drives the outer screen drum to rotate, and the outer screen drum rotates and drives the outer sieve hole to rotate, so that the outer sieve hole and the inner sieve hole on the surface of the inner screen drum are misaligned, so that the aperture obtained after the misalignment of the outer sieve hole and the inner sieve hole is the same as the required sand and gravel specifications. Compared with the traditional drum stone screen, the drum stone screen can complete the screening of sand and gravel of different specifications without replacing the screen separately, and the misalignment of the outer sieve hole and the inner sieve hole on the surface of the inner screen drum is more convenient and quick to adjust the sieve hole, thereby improving the screening efficiency of sand and gravel.

[0009] Preferably, a rotating drum is fixedly installed on the side surface of the fixed disk, and the rotating drum, fixed disk and inner screen drum are connected. Two fixed rings are fixedly installed on the inner side surface of one end of the frame plate, and a rotating ring matching them is connected to the two fixed rings for common rotation. The inner side surface of the rotating ring is fixedly connected to the surface of the rotating drum, and the rotating drum is rotatably connected to the frame plate through matching the fixed ring and the rotating ring.

[0010] By adopting the above technical solution, the fixed ring and the rotating ring are matched with each other, so that the stone screening device rotates more stably during operation.

[0011] Preferably, two ring frames are fixedly installed on the inner side surface of the other end of the frame plate, and the two ring frames are rotatably connected with a rotating ring that matches them. The inner side surface of the rotating ring is fixedly connected to the outer surface of the stone screening device, and the stone screening device is rotatably connected to the frame plate through the matching rotating ring and the ring frame.

[0012] By adopting the above technical solution, the rotating ring and the ring frame match each other, so that the stone screening device rotates more stably during operation.

[0013] Preferably, a fixing frame is fixedly installed on the side surface of the base frame, a fixed circular plate is fixedly installed on the top surface of the fixing frame, the fixed circular plate is rotatably connected to the end of the inner screen drum, and the fixed circular plate matches the end of the inner screen drum, a through-type discharge pipe is fixedly installed on the surface of the fixed circular plate, an expansion cylinder connected to the discharge pipe is fixedly installed on the top surface of the discharge pipe, and a switchable opening and closing door is provided on the surface of the rotating drum.

[0014] Preferably, a gear ring is fixedly mounted on the end surface of the outer sieve drum, a mounting plate is fixedly mounted on the side surface of the base frame, a mounting frame is fixedly mounted on one end surface of the base frame, two support plates are fixedly mounted on the surface of the mounting plate, the surfaces of the two support plates are connected to a rotating shaft for common rotation, and a first gear meshing with the gear ring is fixedly mounted on the surface of the rotating shaft.

[0015] By adopting the above technical solution, the second gear and the first gear have the same size and number of teeth, and the gear ring and the gear ring have the same number of teeth, ensuring that the outer sieve drum and the inner sieve drum rotate synchronously.

[0016] Preferably, the surface of the mounting frame is rotatably connected to a spline cylinder, the internal splines of the spline cylinder are connected to a spline rod, a spring is elastically connected between the spline rod and the inner wall of the spline cylinder, one end of the spring is fixedly connected to the inner wall of the spline cylinder, the other end of the spring is fixedly connected to the surface of the spline rod, a second gear meshing with the ring gear is fixedly installed on the surface of one end of the spline rod, one end of the rotating shaft is fixedly connected to the end surface of the spline cylinder, the second gear and the first gear have the same size and number of teeth, and the ring gear and the gear ring have the same number of teeth.

[0017] By adopting the above technical solution, when the aperture obtained after the outer sieve hole and the inner sieve hole are misaligned and the aperture is the same as the required sand and gravel specifications, the spline rod resets and the second gear is reset to engage with the ring gear, and the second gear and the first gear rotate synchronously and respectively drive the ring gear and the gear ring to rotate. At this time, the rotation of the ring gear drives the stone screening equipment, the fixed plate, the rotating drum and the inner screen drum to rotate, and the rotation of the gear ring drives the outer screen drum and the stone screening equipment to rotate synchronously. At this time, sand and gravel are added to the inside of the expansion cylinder, and the sand and gravel enter the inner screen drum through the discharge pipe. As the outer screen drum and the inner screen drum rotate synchronously, the required sand and gravel are discharged from the aperture obtained after the outer sieve hole and the inner sieve hole are misaligned, avoiding the mixed discharge of sand and gravel of different sizes, thereby ensuring that the screened sand and gravel are more stable and uniform.

[0018] Preferably, a fixed screw barrel is fixedly installed on the surface of the mounting frame, the internal thread of the fixed screw barrel is connected to a threaded rod, an adjusting screw is fixedly installed on the surface of the threaded rod, and a ball bearing is provided on the surface of one end of the threaded rod, and a support plate is fixedly installed on the surface of one of the support plates, and a motor is fixedly installed on the surface of the support plate, and the output end of the motor is fixedly connected to the rotating shaft.

[0019] Preferably, the inner side surfaces of the two frame plates are fixedly mounted with guide plates, and the bottom surfaces of the two guide plates are jointly fixedly mounted with arc-shaped plates, and the bottom surfaces of the arc-shaped plates are provided with a plurality of through-type feed troughs, and feed plates with the same number and corresponding positions as the feed troughs are provided below the arc-shaped plates, and the feed plates are fixedly mounted on the inner side of the base frame.

[0020] Preferably, a base supporting the ground is provided below the base frame, a support seat is fixedly installed on one end surface of the base, one end of the base frame is rotatably connected to the support seat through an axis, a slide is fixedly installed on the bottom surface of the other end of the base frame, and a liftable movable frame is provided below the slide, and the inner side surface of the movable frame is rotatably connected to a roller matching the slide.

[0021] By adopting the above technical solution, the telescopic device is extended and the movable frame moves upward to rotate the base frame and the entire stone screening device. After the rotation is completed, the opening and closing door is opened. At this time, the remaining sand and gravel inside the stone screening device are discharged, and the discharge efficiency of larger-sized sand and gravel is improved.

[0022] Preferably, a telescoping device is fixedly mounted on the other end of the base, and a telescopic end of the telescoping device is fixedly connected to the movable frame.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1) When the drum-type stone screen for a skid loader is in use, the threaded rod is rotated out from the inside of the fixed screw barrel, and the movement of the threaded rod drives the ball to move and squeeze the second gear. At this time, the second gear drives the spline rod to slide out from the inside of the spline barrel. When the second gear moves and disengages from the gear ring, the motor rotates and drives the rotating shaft to rotate, thereby causing the first gear to rotate and the gear ring to rotate, and the gear ring rotates and drives the outer screen barrel to rotate, and the outer screen barrel rotates and drives the outer screen hole to rotate, thereby causing the outer screen hole and the inner screen hole on the surface of the inner screen barrel to be misaligned, so that the aperture obtained after the misalignment of the outer screen hole and the inner screen hole is the same as the required sand and gravel specifications. Compared with the traditional drum-type stone screen, the drum-type stone screen can complete the screening of sand and gravel of different specifications without replacing the screen separately, and the misalignment adjustment of the screen hole between the outer screen hole and the inner screen hole on the surface of the inner screen barrel is more convenient and quick, thereby improving the screening efficiency of sand and gravel.

[0025] 2) When the drum-type stone screen for skid loader is in use, when the aperture obtained by misalignment of the outer sieve hole and the inner sieve hole is the same as the required sand and gravel specifications, the spline rod resets and the second gear resets to engage with the ring gear, and the second gear and the first gear rotate synchronously and respectively drive the ring gear and the gear ring to rotate. At this time, the rotation of the ring gear drives the stone screening equipment, the fixed plate, the rotating drum and the inner sieve drum to rotate, and the rotation of the gear ring drives the outer sieve drum and the stone screening equipment to rotate synchronously. At this time, sand and gravel are added to the inside of the expansion drum, and the sand and gravel enter the inner sieve drum through the discharge pipe. As the outer sieve drum and the inner sieve drum rotate synchronously, the required sand and gravel are discharged from the aperture obtained by misalignment of the outer sieve hole and the inner sieve hole, avoiding the mixed discharge of sand and gravel of different sizes, thereby ensuring that the screened sand and gravel are more stable and uniform.

[0026] 3) When the drum-type stone screener for skid loader is in use, after the required sand and gravel are screened, the feeding into the expansion cylinder is stopped, the telescopic device is extended and the movable frame moves upward to rotate the base frame and the entire stone screening device. After the rotation is completed, the opening and closing door is opened, and the remaining sand and gravel inside the stone screening device are discharged, while improving the discharge efficiency of larger-sized sand and gravel. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 This is a schematic structural diagram of the opening state of the opening and closing door of the present invention;

[0029] Figure 3 This is a schematic diagram of the base frame and frame plate positions of the present invention;

[0030] Figure 4 This is a schematic diagram of the structure of the stone sieve and the rotating ring of the present invention;

[0031] Figure 5 This is a schematic diagram of the explosion structure of the inner sieve drum and the outer sieve drum of the present invention;

[0032] Figure 6 Schematic diagram of the cross-sectional structure of the inner sieve drum and the outer sieve drum of the present invention;

[0033] Figure 7 This is a schematic diagram of the structure of the ring frame and the rotating ring of the present invention;

[0034] Figure 8 This is a schematic diagram of the position structure of the rotating shaft and the first gear of the present invention;

[0035] Figure 9 This is a schematic diagram of the mounting bracket and spline cylinder position structure of the present invention;

[0036] Figure 10 This is a schematic diagram of the position structure of the guide plate and the curved plate of the present invention;

[0037] Figure 11 It is a schematic diagram of the position structure of the carriage and rollers of the present invention;

[0038] Figure 12 It is a schematic diagram of the position structure of the base and support seat of the present invention.

[0039] Explanation of the reference numbers in the figure: 1. Base frame; 2. Frame plate; 3. Rotating drum; 4. Fixed plate; 5. Stone screening equipment; 6. Inner screen drum; 7. Outer screen drum; 8. Rotating trough; 9. Arc-shaped rotating block; 10. Gear ring; 11. Ring groove; 12. Arc-shaped block; 13. Inner sieve hole; 14. Outer sieve hole; 15. Fixed ring; 16. Rotating ring; 17. Ring frame; 18. Rotating ring; 19. Fixed frame; 20. Fixed circular plate; 21. Feeding pipe; 22. Expansion cylinder; 23. Gear ring; 24. Mounting plate; 25. Mounting frame ; 26. Support plate; 27. Rotating shaft; 28. First gear; 29. ​​Spline cylinder; 30. Spline rod; 31. Spring; 32. Second gear; 33. Fixed screw cylinder; 34. Threaded rod; 35. Adjusting screw; 36. Ball; 37. Support plate; 38. Motor; 39. Guide plate; 40. Arc plate; 41. Discharge chute; 42. Discharge plate; 43. Opening and closing door; 44. Base; 45. Support seat; 46. Slide; 47. Movable frame; 48. Roller; 49. Telescope. DETAILED DESCRIPTION

[0040] See also Figure 1 - Figure 12A drum-type stone screen for a skid loader comprises a base frame 1 and corresponding frame plates 2 fixedly mounted on its surface. A rotatable stone screening device 5 is provided between the two frame plates 2. The stone screening device 5 is an existing outer grid stone screening device. A fixed disc 4 is fixedly mounted on one end surface of the stone screening device 5. An inner screen drum 6 is fixedly mounted on the side of the fixed disc 4. Stone is added to the inner screen drum 6. A rotatable outer screen drum 7 is provided between the stone screening device 5 and the inner screen drum 6. The inner side surface of the outer screen drum 7 contacts the outer surface of the inner screen drum 6 to prevent the screened sand and gravel from pouring into the space between the outer screen drum 7 and the inner screen drum 6. The inner side surface of the fixed disc 4 is open. A rotating groove 8 is provided, and a plurality of arc-shaped rotating blocks 9 matching the rotating groove 8 are fixedly installed on one end surface of the outer screen drum 7. The outer screen drum 7 is matched with the rotating groove 8 by the arc-shaped rotating block 9 and the rotating groove 8, thereby being rotatably connected with the fixed disk 4. The outer screen drum 7 and the inner screen drum 6 can rotate synchronously. The outer screen drum 7 can also rotate alone and then rotate synchronously with the inner screen drum 6. A gear ring 10 is fixedly installed on the other end surface of the stone screening device 5. An annular groove 11 is provided on the inner wall of the gear ring 10. A plurality of arc-shaped blocks 12 matching the annular groove 11 are fixedly installed on the end surface of the outer screen drum 7. The outer screen drum 7 is matched with the annular groove 11 by the arc-shaped block 12 and the annular groove 11, thereby being rotatably connected with the gear ring 10. Then, the surface of the inner screen drum 6 is provided with a plurality of through inner screen holes 13, and the surface of the outer screen drum 7 is provided with a plurality of through outer screen holes 14. When the inner screen holes 13 and the outer screen holes 14 are aligned, the specifications of the screened sand and gravel are the largest. After the outer screen holes 14 and the inner screen holes 13 are misaligned, the specifications of the screened sand and gravel are changed. The threaded rod 34 is rotated and unscrewed from the inside of the fixed screw cylinder 33. The threaded rod 34 moves with the ball 36 to squeeze the second gear 32. At this time, the second gear 32 moves with the spline rod 30 to slide out from the inside of the spline cylinder 29. When the second gear 32 moves and disengages from the gear ring 10, the motor 38 rotates and drives the shaft 2 7 rotates, thereby causing the first gear 28 to rotate with the gear ring 23, the gear ring 23 rotates with the outer sieve drum 7, and the outer sieve drum 7 rotates with the outer sieve hole 14, thereby causing the outer sieve hole 14 to be misaligned with the inner sieve hole 13 on the surface of the inner sieve drum 6, so that the aperture obtained after the misalignment of the outer sieve hole 14 and the inner sieve hole 13 is the same as the required sand and gravel specifications. Compared with the traditional drum-type stone screen, the drum-type stone screen can complete the screening of sand and gravel of different specifications without replacing the screen separately, and the misalignment adjustment of the sieve hole between the outer sieve hole 14 and the inner sieve hole 13 on the surface of the inner sieve drum 6 is more convenient and quick, thereby improving the screening efficiency of sand and gravel.

[0041] The side surface of the fixed plate 4 is fixedly mounted with a rotating drum 3, and the rotating drum 3, the fixed plate 4 and the inner screen drum 6 are connected. Two fixed rings 15 are fixedly mounted on the inner side surface of one end of the frame plate 2. A swivel 16 matching the two fixed rings 15 is rotatably connected therebetween. The inner side surface of the swivel 16 is fixedly connected to the surface of the rotating drum 3. The rotating drum 3 is rotatably connected to the frame plate 2 through the matching of the fixed ring 15 and the swivel 16. The matching of the fixed ring 15 and the swivel 16 makes the stone screening device rotate more stably during operation. The entire stone screen is mounted on the lifting frame of the skid loader through the base frame 1 and existing bolts.

[0042] Two ring frames 17 are fixedly installed on the inner side surface of the other end of the frame plate 2. A rotating ring 18 matching the two ring frames 17 is connected to each other for rotation. The inner side of the rotating ring 18 is fixedly connected to the outer surface of the stone screening device 5. The stone screening device 5 is rotatably connected to the frame plate 2 through the matching of the rotating ring 18 and the ring frame 17. The rotating ring 18 and the ring frame 17 match each other, so that the stone screening device rotates more stably during operation.

[0043] A fixing frame 19 is fixedly installed on the side surface of the base frame 1, and a fixed circular plate 20 is fixedly installed on the top surface of the fixing frame 19. The fixed circular plate 20 is rotatably connected to the end of the inner screen cylinder 6, and the fixed circular plate 20 matches the end of the inner screen cylinder 6. A through-type discharge pipe 21 is fixedly installed on the surface of the fixed circular plate 20, and an expansion cylinder 22 connected to the discharge pipe 21 is fixedly installed on the top surface of the discharge pipe 21. A switchable opening and closing door 43 is provided on the surface of the rotating drum 3. The opening and closing of the opening and closing door 43 is an existing technology and will not be described in detail here.

[0044] A gear ring 23 is fixedly mounted on the end surface of the outer sieve drum 7, a mounting plate 24 is fixedly mounted on the side surface of the base frame 1, a mounting frame 25 is fixedly mounted on one end surface of the base frame 1, two support plates 26 are fixedly mounted on the surface of the mounting plate 24, and the surfaces of the two support plates 26 are connected to a rotating shaft 27 for common rotation, and a first gear 28 meshing with the gear ring 23 is fixedly mounted on the surface of the rotating shaft 27, the second gear 32 and the first gear 28 have the same size and number of teeth, and the gear ring 10 and the gear ring 23 have the same number of teeth, thereby ensuring that the outer sieve drum 7 and the inner sieve drum 6 rotate synchronously.

[0045] The surface of the mounting frame 25 is rotatably connected to a spline cylinder 29, and the internal splines of the spline cylinder 29 are connected to a spline rod 30. A spring 31 is elastically connected between the spline rod 30 and the inner wall of the spline cylinder 29. The spring 31 is used to reset the spline rod 30. One end of the spring 31 is fixedly connected to the inner wall of the spline cylinder 29, and the other end of the spring 31 is fixedly connected to the surface of the spline rod 30. A second gear 32 meshing with the ring gear 10 is fixedly installed on the surface of one end of the spline rod 30. One end of the rotating shaft 27 is fixedly connected to the end surface of the spline cylinder 29. The second gear 32 and the first gear 28 have the same size and number of teeth, and the ring gear 10 and the gear ring 23 have the same number of teeth. When the outer sieve hole 14 is misaligned with the inner sieve hole 13, the aperture obtained is the same as the required After the specifications of sand and gravel are the same, the spline rod 30 resets and drives the second gear 32 to reset and mesh with the ring gear 10. The second gear 32 and the first gear 28 rotate synchronously and drive the ring gear 10 and the gear ring 23 to rotate respectively. At this time, the ring gear 10 rotates and drives the stone screening device 5, the fixed plate 4, the rotating drum 3 and the inner screen drum 6 to rotate. The gear ring 23 rotates and drives the outer screen drum 7 to rotate synchronously with the stone screening device 5. At this time, sand and gravel are added to the inside of the expansion cylinder 22, and the sand and gravel enter the inner screen drum 6 through the discharge pipe 21. As the outer screen drum 7 and the inner screen drum 6 rotate synchronously, the required sand and gravel are discharged from the aperture obtained by the misalignment of the outer sieve hole 14 and the inner sieve hole 13, avoiding the mixed discharge of sand and gravel of different sizes, thereby ensuring that the screened sand and gravel are more stable and uniform.

[0046] A fixing screw barrel 33 is fixedly mounted on the surface of the mounting frame 25, and a threaded rod 34 is connected to the internal thread of the fixing screw barrel 33. An adjusting screw 35 is fixedly mounted on the surface of the threaded rod 34. A ball 36 is provided on the surface of one end of the threaded rod 34. The ball 36 contacts the surface of the second gear 32 to reduce friction. A support plate 37 is fixedly mounted on the surface of one of the support plates 26, and a motor 38 is fixedly mounted on the surface of the support plate 37. The output end of the motor 38 is fixedly connected to the rotating shaft 27. The motor 38 is a conventional electric motor in the prior art, and the motor 38 can perform servo motion and high-speed rotation.

[0047] The inner side surfaces of the two frame plates 2 are fixedly installed with guide plates 39, which are used to guide the flow of sand and gravel. The bottom surfaces of the two guide plates 39 are jointly fixedly installed with an arc plate 40, and the bottom surface of the arc plate 40 is provided with multiple through-type discharge troughs 41. Below the arc plate 40, there are discharge plates 42 with the same number and corresponding positions as the discharge troughs 41. The discharge plates 42 are fixedly installed on the inner side of the base frame 1.

[0048] A base 44 supporting the ground is provided below the base frame 1, and a support seat 45 is fixedly installed on one end surface of the base 44. One end of the base frame 1 is rotatably connected to the support seat 45 through an axis, and a slide 46 is fixedly installed on the bottom surface of the other end of the base frame 1. A liftable movable frame 47 is provided below the slide 46, and the inner side surface of the movable frame 47 is rotatably connected to a roller 48 matching the slide 46. When the required sand and gravel are screened, the feeding into the expansion cylinder 22 is stopped, and the telescopic device 49 is extended to move the movable frame 47 upward to rotate the base frame 1 and the entire stone screening device. After the rotation is completed, the opening and closing door 43 is opened. At this time, the remaining sand and gravel inside the stone screening device are discharged, and at the same time, the discharge efficiency of sand and gravel with larger specifications is improved.

[0049] A telescoping device 49 is fixedly mounted on the other end of the base 44 . The telescoping device 49 is a conventional electric-controlled push rod in the prior art. The telescopic end of the telescoping device 49 is fixedly connected to the movable frame 47 .

[0050] The use steps of the present invention are as follows: when the drum-type stone screen for a skid loader is in use, in the initial state, the opening and closing door 43 closes the drum 3, the equipment is shut down and the machine is stopped, and the adjusting screw 35 is rotated by an existing external wrench according to the specifications of the sand and gravel to be screened. At this time, the threaded rod 34 rotates and unscrews out from the inside of the fixed screw barrel 33, and the threaded rod 34 moves with the ball 36 to squeeze the second gear 32. At this time, the second gear 32 moves with the spline rod 30 to slide out of the inside of the spline barrel 29 to stretch the spring 31. When the second gear 32 moves and disengages from the ring gear 10, the rotation of the adjusting screw 35 is stopped, and then the motor 38 is started (the motor 38 is a conventional electric motor in the prior art, and the motor 38 can perform servo motion and high-speed rotation). The motor 38 rotates and drives the drum 32 to rotate. The shaft 27 rotates, causing the first gear 28 to rotate with the gear ring 23, and the gear ring 23 rotates with the outer sieve drum 7, and the outer sieve drum 7 rotates on the fixed plate 4 through the matching of the arc-shaped rotating block 9 and the rotating groove 8. The arc-shaped block 12 rotates inside the annular groove 11, and the outer sieve drum 7 rotates with the outer sieve hole 14, thereby causing the outer sieve hole 14 to be misaligned with the inner sieve hole 13 on the surface of the inner sieve drum 6. The misalignment of the outer sieve hole 14 and the inner sieve hole 13 reduces the aperture (because the second gear 32 moves and disengages from the gear ring 10, when the first gear 28 rotates and drives the gear ring 23 to rotate, the second gear 32 idles, and the ball 36 contacts the surface of the second gear 32 to reduce friction). When the aperture obtained after the outer sieve hole 14 and the inner sieve hole 13 are misaligned is the same as the required sand and gravel specifications, the gear 32 stops. The motor 38 is stopped from rotating, and then the adjusting screw 35 is rotated by the existing external wrench, and the threaded rod 34 is rotated to screw into the inside of the fixed screw barrel 33. At this time, the spline rod 30 slides into the spline barrel 29 under the action of the spring 31. When the spline rod 30 is reset, the second gear 32 is engaged with the ring gear 10. The adjusting screw 35 is continued to be rotated, and the threaded rod 34 is rotated to continue to screw into the inside of the fixed screw barrel 33. The ball 36 is separated from the surface of the second gear 32. The motor 38 rotates continuously at high speed to rotate the shaft 27, and the shaft 27 rotates to rotate the spline barrel 29, so that the spline rod 30 rotates the second gear 32. The second gear 32 and the first gear 28 rotate synchronously to rotate the ring gear 10 and the gear ring 23 respectively. At this time, the ring gear 10 rotates to rotate the screen The stone equipment 5, fixed plate 4, rotating drum 3 and inner screen drum 6 rotate, and the gear ring 23 rotates to drive the outer screen drum 7 to rotate synchronously with the stone screening equipment 5. At this time, sand and gravel are added to the inside of the expansion cylinder 22, and the sand and gravel enter the inner screen drum 6 through the discharge pipe 21. As the outer screen drum 7 and the inner screen drum 6 rotate synchronously, the required sand and gravel are discharged from the aperture obtained by the misalignment of the outer sieve hole 14 and the inner sieve hole 13. The discharged sand and gravel are guided by two guide plates 39 and slide down to the bottom surface of the arc plate 40, and then flow into the inside of the discharge plate 42 through the discharge trough 41, and the sand and gravel flowing out of the discharge plate 42 are collected. When the required sand and gravel are screened, the feeding into the expansion cylinder 22 is stopped, and the telescopic device 49 extends and drives the movable frame 47 to move upward to rotate the base frame 1 and the entire stone screening device. After the rotation is completed,Open the opening and closing door 43, and the remaining sand and gravel inside the stone screening device are discharged. The threaded rod 34 is rotated to unscrew it from the inside of the fixed screw cylinder 33. The threaded rod 34 moves with the ball 36 to squeeze the second gear 32. At this time, the second gear 32 moves with the spline rod 30 to slide out from the inside of the spline cylinder 29. When the second gear 32 moves and disengages from the gear ring 10, the motor 38 rotates with the shaft 27, thereby causing the first gear 28 to rotate with the gear ring 23, and the gear ring 23 rotates with the outer sieve cylinder 7, and the outer sieve The drum 7 rotates with the outer sieve hole 14 to rotate, thereby causing the outer sieve hole 14 to be misaligned with the inner sieve hole 13 on the surface of the inner sieve drum 6, so that the aperture obtained after the outer sieve hole 14 and the inner sieve hole 13 are misaligned is the same as the required sand and gravel specifications. Compared with the traditional drum-type stone screen, the drum-type stone screen can complete the screening of sand and gravel of different specifications without replacing the screen separately, and the outer sieve hole 14 and the inner sieve hole 13 on the surface of the inner sieve drum 6 are misaligned to adjust the sieve hole more conveniently and quickly, thereby improving the screening efficiency of sand and gravel; when the outer sieve hole 14 and the inner sieve hole 13 are misaligned, the aperture obtained is the same as the required sand and gravel specifications. After the aperture of the expansion cylinder 22 is the same as the required sand and gravel specifications, the spline rod 30 resets and drives the second gear 32 to reset and mesh with the ring gear 10. The second gear 32 and the first gear 28 rotate synchronously and drive the ring gear 10 and the gear ring 23 to rotate respectively. At this time, the ring gear 10 rotates and drives the stone screening device 5, the fixed plate 4, the rotating drum 3 and the inner screen drum 6 to rotate. The gear ring 23 rotates and drives the outer screen drum 7 to rotate synchronously with the stone screening device 5. At this time, sand and gravel are added to the inside of the expansion cylinder 22, and the sand and gravel enter the inner screen drum 6 through the discharge pipe 21. As the outer screen drum 7 and the inner screen drum 6 rotate synchronously, the outer screen drum 7 and the inner screen drum 6 rotate synchronously. The required sand and gravel are discharged from the aperture obtained by misaligning the outer sieve hole 14 and the inner sieve hole 13, avoiding the mixed discharge of sand and gravel of different sizes, thereby ensuring that the screened sand and gravel are more stable and uniform; when the required sand and gravel are screened, the feeding into the expansion cylinder 22 is stopped, and the telescopic device 49 extends and moves upward with the movable frame 47 to rotate the base frame 1 and the entire stone screening device. After the rotation is completed, the opening and closing door 43 is opened, and the remaining sand and gravel inside the stone screening device is discharged, while improving the discharge efficiency of larger sand and gravel.

[0051] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A drum-type stone screen for a skid loader, comprising a base frame (1) and a corresponding frame plate (2) fixedly mounted on the surface thereof, characterized in that: A rotatable stone screening device (5) is provided between the two frame plates (2), a fixed disk (4) is fixedly installed on one end surface of the stone screening device (5), an inner screen drum (6) is fixedly installed on the side of the fixed disk (4), a rotatable outer screen drum (7) is provided between the stone screening device (5) and the inner screen drum (6), the inner side surface of the outer screen drum (7) contacts the outer surface of the inner screen drum (6), a rotating groove (8) is provided on the inner side surface of the fixed disk (4), a plurality of arc-shaped rotating blocks (9) matching the rotating groove (8) are fixedly installed on one end surface of the outer screen drum (7), the outer screen drum (7) is rotatably connected to the fixed disk (4) through the matching of the arc-shaped rotating blocks (9) and the rotating groove (8), The outer sieve drum (7) and the inner sieve drum (6) can rotate synchronously, and the outer sieve drum (7) can also rotate independently and then rotate synchronously with the inner sieve drum (6). A gear ring (10) is fixedly mounted on the other end surface of the stone screening device (5), and an annular groove (11) is provided on the inner wall of the gear ring (10). A plurality of arc blocks (12) matching the annular groove (11) are fixedly mounted on the end surface of the outer sieve drum (7). The outer sieve drum (7) is rotatably connected to the gear ring (10) by matching the arc blocks (12) and the annular groove (11). A plurality of through-type inner sieve holes (13) are provided on the surface of the inner sieve drum (6), and a plurality of through-type outer sieve holes (14) are provided on the surface of the outer sieve drum (7). A gear ring (23) is fixedly mounted on the end surface of the outer sieve drum (7), a mounting plate (24) is fixedly mounted on the side surface of the base frame (1), a mounting frame (25) is fixedly mounted on one end surface of the base frame (1), a surface of the mounting frame (25) is rotatably connected to a spline cylinder (29), two support plates (26) are fixedly mounted on the surface of the mounting plate (24), and surfaces of the two support plates (26) are rotatably connected to a rotating shaft (27), one end of the rotating shaft (27) is fixedly connected to the end surface of the spline cylinder (29), and a first gear (28) meshing with the gear ring (23) is fixedly mounted on the surface of the rotating shaft (27); The internal spline of the spline cylinder (29) is connected to a spline rod (30), and a spring (31) is elastically connected between the spline rod (30) and the inner wall of the spline cylinder (29), one end of the spring (31) is fixedly connected to the inner wall of the spline cylinder (29), and the other end of the spring (31) is fixedly connected to the surface of the spline rod (30), and a second gear (32) meshing with the ring gear (10) is fixedly installed on the surface of one end of the spline rod (30), and the second gear (32) and the first gear (28) have the same size and number of teeth, and the ring gear (10) and the gear ring (23) have the same number of teeth, and a fixed screw barrel (33) is fixedly installed on the surface of the mounting frame (25), and the internal thread of the fixed screw barrel (33) is connected to a threaded rod (34), and an adjusting screw (35) is fixedly installed on the surface of the threaded rod (34), and a ball (36) is provided on the surface of one end of the threaded rod (34); A slide (46) is fixedly mounted on the bottom surface of the other end of the base frame (1), and a movable frame (47) that can be raised and lowered is provided below the slide (46). The inner side surface of the movable frame (47) is rotatably connected to a roller (48) that matches the slide (46).

2. The drum stone screen for a skid steer loader according to claim 1, characterized in that: A rotating drum (3) is fixedly mounted on the side surface of the fixed disk (4), and the rotating drum (3), the fixed disk (4) and the inner screen drum (6) are in communication. Two fixed rings (15) are correspondingly fixedly mounted on the inner side surface of one end of the frame plate (2), and a rotating ring (16) matching the two fixed rings (15) is rotatably connected therebetween. The inner side surface of the rotating ring (16) is fixedly connected to the surface of the rotating drum (3), and the rotating drum (3) is rotatably connected to the frame plate (2) by matching the fixed ring (15) and the rotating ring (16).

3. The drum-type stone screen for a skid steer loader according to claim 2, characterized in that: Two ring frames (17) are fixedly mounted on the inner side surface of the other end of the frame plate (2), and a rotating ring (18) matching the two ring frames (17) is rotatably connected therebetween. The inner side surface of the rotating ring (18) is fixedly connected to the outer surface of the stone screening device (5), and the stone screening device (5) is rotatably connected to the frame plate (2) by matching the rotating ring (18) and the ring frame (17).

4. The drum stone screen for a skid steer loader according to claim 2, characterized in that: A fixing frame (19) is fixedly mounted on the side surface of the base frame (1), a fixing circular plate (20) is fixedly mounted on the top surface of the fixing frame (19), the fixing circular plate (20) is rotatably connected to the end of the inner screen drum (6), and the fixing circular plate (20) matches the end of the inner screen drum (6), a through-type discharge pipe (21) is fixedly mounted on the surface of the fixing circular plate (20), an expansion cylinder (22) connected to the discharge pipe (21) is fixedly mounted on the top surface, and a switchable opening and closing door (43) is provided on the surface of the rotating drum (3).

5. The drum-type stone screen for a skid steer loader according to claim 1, characterized in that: A support plate (37) is fixedly mounted on the surface of one of the support plates (26), a motor (38) is fixedly mounted on the surface of the support plate (37), and an output end of the motor (38) is fixedly connected to the rotating shaft (27).

6. The drum-type stone screen for a skid steer loader according to claim 1, characterized in that: The inner side surfaces of the two frame plates (2) are both fixedly mounted with guide plates (39), and the bottom surfaces of the two guide plates (39) are jointly fixedly mounted with an arc-shaped plate (40), and the bottom surface of the arc-shaped plate (40) is provided with a plurality of through-type feed troughs (41), and the bottom surface of the arc-shaped plate (40) is provided with feed troughs (41) of the same number and corresponding positions as the feed troughs (41), and the feed troughs (42) are fixedly mounted on the inner side of the base frame (1).

7. The drum-type stone screen for a skid steer loader according to claim 1, characterized in that: A base (44) supporting the ground is provided below the base frame (1), a support seat (45) is fixedly mounted on one end surface of the base frame (44), and one end of the base frame (1) is rotatably connected to the support seat (45) via a shaft.

8. The drum-type stone screen for a skid steer loader according to claim 7, characterized in that: A telescoping device (49) is fixedly mounted on the other end of the base (44), and the telescopic end of the telescoping device (49) is fixedly connected to the movable frame (47).

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