A fan guide tube positioning device

Abstract

The present invention provides a positioning device for a fan guide tube, comprising a main shaft component and a table bottom plate, the main shaft component comprising a main shaft, the upper end of the main shaft is fixedly connected to the center of the table bottom plate through a connecting sleeve; N mounting holes are arranged on the upper surface of the table bottom plate, all of which are evenly arranged around the center of the table bottom plate and extend radially; a tensioning arc is correspondingly arranged on the outer side of each mounting hole, and the extension lines of adjacent tensioning arcs are connected to form a tensioning ring; a diameter adjustment mechanism is installed on the table bottom plate at the position of the mounting hole; the diameter adjustment mechanism comprises a mounting frame and a first motor, the mounting frame is installed at the position of the mounting hole, and is matched with the corresponding tensioning arc; the first motor drives the mounting frame to slide back and forth along the mounting hole, thereby changing the inner diameter of the tensioning ring.

Description

Technical Field

[0001] The invention relates to the technical field of fans, and in particular to a positioning device for a guide tube of a fan. Background Art

[0002] In order to improve the performance of the fan, such as air volume, air pressure, shaft power, noise and vibration, it is one of the most commonly used methods to place a guide device in front of the impeller air inlet to change the airflow direction. The most commonly used guide device is a guide tube, which is cylindrical and generally consists of an inner tube, an outer tube and a guide plate. In the prior art, the fan guide tube and the top plate are often welded together to form a fan mounting plate to solve the problem that the fan top plate cannot be stretched as a whole and is inconvenient to install. The existing process is to first drill positioning holes on the guide tube and the top plate, then connect them with bolts, and then weld the positioning holes. This solution leads to low concentricity between the top plate and the guide tube, large product deformation and low efficiency. Some guide tubes also need to process the hole position. The existing solution is to make a positioning drill sleeve, and the concentricity is positioned by several positioning columns on the drill sleeve. If the gap of the circumferential size of the positioning column is small, it is not suitable to be placed in the guide tube due to the roundness problem of the guide tube. If the gap is large, the coaxiality of the hole position processed later and the cylinder body cannot be guaranteed. Summary of the invention

[0003] In order to overcome the deficiencies in the prior art, the present invention provides a guide tube clamping mechanism which is convenient and stable to connect and can reduce the deformation of the guide tube.

[0004] The technical solution of the present invention is: a fan guide tube positioning device, including a main shaft component and a table bottom plate, the main shaft component includes a main shaft, the upper end of the main shaft is fixedly connected to the center of the table bottom plate through a connecting sleeve; N mounting holes are arranged on the upper surface of the table bottom plate, and all the mounting holes are evenly arranged around the center of the table bottom plate and extend radially; a tensioning arc is correspondingly arranged on the outer side of each mounting hole, and the extension lines of adjacent tensioning arcs are connected to form a tensioning ring; a diameter adjustment mechanism is installed on the table bottom plate at the position of the mounting hole; the diameter adjustment mechanism includes a mounting frame and a first motor, the mounting frame is installed at the position of the mounting hole, and is matched with the corresponding tensioning arc; the first motor drives the mounting frame to slide back and forth along the mounting hole, thereby changing the inner diameter of the tensioning ring. The size of the main shaft is sleeved with a large bevel gear; the mounting frame includes an upper top plate of the diameter adjusting mechanism, two side plates of the diameter adjusting mechanism respectively abutting against the front and rear ends of the mounting hole, and a lower bottom plate of the diameter adjusting mechanism; a tensioning arc mounting seat is installed on the upper top plate of the diameter adjusting mechanism, and the lower side of the tensioning arc mounting seat is slidably connected with the upper top plate of the diameter adjusting mechanism, and the side surface of the tensioning arc mounting seat is matched and connected with the inner side of the tensioning arc; a screw rod mounting seat and a screw rod are arranged at the lower end of the tensioning arc mounting seat, and the screw rod passes through the screw rod mounting seat and the inner side of the diameter adjusting mechanism side plate in turn, The support is between the main shaft and the side plate of the diameter adjusting mechanism on the outside; the screw rod mounting seat is slidably connected to the lower bottom plate of the diameter adjusting mechanism; the end of the screw rod is connected to a small bevel gear; the large bevel gear is meshed with all the small bevel gears, and the first motor drives one of the small bevel gears to rotate, and the small bevel gear drives the other small bevel gears to rotate through the transmission action of the large bevel gear, and the screw rod mounting seat is driven to slide back and forth on the screw rod through the transmission action of the small bevel gear, thereby driving the tensioning arc mounting seat to move back and forth along the lower bottom plate of the diameter adjusting mechanism, and changing the inner diameter of the tensioning ring.

[0005] Furthermore, a stop block is provided at the end of each upper top plate of the diameter adjusting mechanism; a tensioning power disk is provided at the center of the table bottom plate, the tensioning power disk includes a circular upper top plate of the power disk, a cylindrical base extends downward from the middle of the upper top plate of the power disk, and N active bevels are provided around the cylindrical base, and the active bevels are abutted against the corresponding stop blocks.

[0006] Furthermore, after the end of the screw rod passes through the inner side plate of the diameter adjusting mechanism, it passes through a screw rod bearing seat and is connected to the small bevel gear. A tension spring is provided between the screw rod bearing seat and the inner side plate of the diameter adjusting mechanism.

[0007] Furthermore, a small bevel gear bearing seat is sleeved on the main shaft, and the small bevel gear bearing seat is located below the table bottom plate; the upper end of the screw bearing seat is against the lower surface of the small bevel gear bearing seat through a small bevel gear bearing seat mounting bottom plate.

[0008] Furthermore, the gaps between the adjacent upper plates of the diameter adjusting mechanisms are filled with equal-height tables, which are fixedly supported on the table bottom plate by connecting columns; the upper surfaces of the equal-height tables are flush with the upper surfaces of the upper plates of the diameter adjusting mechanisms.

[0009] Furthermore, the spindle component also includes a rotating cylinder, which is located at the bottom of the spindle. The output shaft of the rotating cylinder is coaxially arranged with the spindle to drive the spindle to rotate.

[0010] Furthermore, the main shaft component also includes a gear, a transmission gear and a second motor; the gear is located below the large bevel gear and is sleeved on the main shaft; the transmission gear is located on one side of the gear and meshes with the gear; the second motor drives the transmission gear to rotate, driving the gear to rotate.

[0011] Furthermore, six diameter adjustment mechanisms are distributed on the table bottom plate.

[0012] Furthermore, the first motor is a stepper or servo motor; the second motor is a stepper or servo motor. Advantageous effects of the present invention:

[0013] (1) The expansion ring connects and compresses the guide tube, avoiding operations such as punching and welding, and avoiding damage to the guide tube. The diameter of the circumferential wall of the guide tube can be adjusted by changing the inner diameter of the expansion ring surrounded by the six expansion arcs. The six expansion arcs are symmetrically arranged to fully fit the guide tube, so that the inner wall of the guide tube is evenly stressed and the expansion force is evenly distributed, thereby achieving the purpose of adjusting the diameter of the circumferential wall of the guide tube and ensuring the roundness of the guide tube.

[0014] (2) The stepping rhythm of the diameter adjustment mechanism is controlled through the cooperation of the transmission gear and the gear.

[0015] (3) The output shaft of the rotating oil cylinder drives the tensioning power disc to rise, actively loosens the stop block, and drives the entire diameter adjustment mechanism and the tensioning arc to move inward in the outer direction of the circle through the tension spring to loosen the tensioning arc.

[0016] (4) The diameter adjustment mechanism is composed of a large bevel gear and a small bevel gear, which can be adjusted from multiple directions at the same time, thus better ensuring the roundness of the connecting parts.

[0017] (5) Because the tensioning force must be always on during the operation, if the tensioning action is performed by the motor alone, it is easy to cause the motor to stall and the motor is easy to be damaged. If the tensioning action is performed by the cylinder alone, the tensioning range is small. If the cylinder increases the adjustment range through the rod mechanism, the axial operation range of the tensioning mechanism is very large. Therefore, the application itself adopts both the motor and the cylinder to achieve the tensioning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] FIG1 is a schematic structural diagram of a fan guide tube positioning device according to the present invention;

[0019] Figure 2: A schematic structural diagram of a fan guide tube positioning device of the present invention (some components are hidden);

[0020] Figure 3: A schematic diagram of the structure of the diameter adjustment mechanism of the present invention;

[0021] Figure 4: Schematic diagram of the split structure of the diameter adjustment mechanism in the present invention;

[0022] FIG5 is a schematic structural diagram of the tensioning power disk of the present invention;

[0023] Figure 6: A schematic diagram of the structure of the spindle component in the present invention;

[0024] In the figure: 1-tensioning power disk; 101-power disk upper top plate; 102-active bevel; 103-base; 2-diameter adjustment mechanism; 201-tension arc mounting seat; 202-diameter adjustment mechanism upper top plate; 203-diameter adjustment mechanism side plate; 204-diameter adjustment mechanism lower bottom plate; 205-screw; 206-bearing; 207-screw mounting seat; 208-inner spline fixing sleeve; 209-spline slide rail; 210-inner spline slide sleeve; 211-small bevel gear; 212-screw bearing seat; 213-block; 214-tension spring; 215-first slide groove; 216-second slide rail; 217-second slide groove; 218-foreign matter baffle; 3-tension arc; 4-equal height table; 5-table bottom plate; 501-second slide rail 6-extension rod; 7-fixing nut; 8-first motor; 9-second motor; 10-base; 11-rotating cylinder; 12-connecting sleeve; 13-spindle bearing seat; 14-spindle component; 1401-spindle; 1402 / 1403 / 1405 / 1406-position adjustment nut; 1404-large bevel gear; 1407-brush; 1408-gear; 1409-end bearing; 1410-thrust bearing. DETAILED DESCRIPTION

[0025] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention is further described below in conjunction with the accompanying drawings, but the present invention is not limited in any way. Any changes or improvements made based on the teachings of the present invention belong to the protection scope of the present invention. Embodiment 1

[0026] As shown in FIG1-6, a fan guide tube positioning device mainly includes a main shaft component 14 and a table bottom plate 5. The main shaft component 14 includes a main shaft 1401. The upper end of the main shaft 1401 is fixedly connected to the table bottom plate 5 through a connecting sleeve 12. The table bottom plate 5 is a circular plate, and 6 mounting holes are arranged on the upper surface. The mounting holes extend radially and are evenly arranged around the center of the table bottom plate 5. A tensioning arc 3 is correspondingly arranged on the outer side of each mounting hole. All tensioning arcs 3 are in an arc shape, and the extension lines of adjacent tensioning arcs 3 are connected to form a tensioning circle. A diameter adjustment mechanism 2 is installed on the table bottom plate 5 at the position of the mounting hole, and the diameter adjustment mechanism 2 is connected with the tensioning arc 3. The tensioning arc 3 is in an arc shape, and there is a convex block on the inner wall. The convex block and the card slot cooperate to complete the connection between the tensioning arc 3 and the tensioning arc mounting seat 201.

[0027] The diameter adjustment mechanism 2 includes 6 mounting frames consisting of an upper plate 202 of the diameter adjustment mechanism, two side plates 203 of the diameter adjustment mechanism respectively abutting against the front and rear ends of the mounting hole, and a lower bottom plate 204 of the diameter adjustment mechanism, and a first motor 8. The upper plate 202 of the diameter adjustment mechanism is above the table bottom plate 5, and the gap between the adjacent upper plates 202 of the diameter adjustment mechanism is filled with a contour table 4, which is fixedly supported on the table bottom plate 5 by a connecting column. The inner side of the contour table 4 is arc-shaped, and the outer side is also arc-shaped. The upper surface of the contour table 4 is flush with the upper surface of the upper plate 202 of the diameter adjustment mechanism. The contour table is to ensure that the bottom edge of the workpiece can be placed flat, to ensure that the bottom edge of the workpiece can be stressed during the processing of the wind tube, and to ensure that the workpiece is not deformed.

[0028] In each mounting frame, a strip hole extending inwardly and outwardly is provided on the upper top plate 202 of the diameter adjusting mechanism, a strip-shaped foreign body prevention baffle 218 is installed in the middle of the strip hole, a tensioning arc mounting seat 201 is installed above the foreign body prevention baffle 218, and the lower end of the tensioning arc mounting seat 201 is fixedly connected to a connecting plate 219, and the connecting plate 219 is positioned and fixedly connected to a wire rod mounting seat 207 through a convex and concave structure. A through hole is provided on the connecting plate 219, and the foreign body prevention baffle 218 is fixed to the upper top plate 202 of the diameter adjusting mechanism through the through hole of the connecting plate 219.

[0029] A first slide rail 501 is arranged outside the tensioning arc mounting seat 201, and a first slide groove 215 is arranged on the lower surface of the upper top plate 202 of the diameter adjustment mechanism, and the first slide groove 215 cooperates with the first slide rail 501. A screw rod mounting hole is arranged at the lower part of the screw rod mounting seat 207, and a screw rod 205 is arranged in the screw rod mounting hole. The screw rod 205 passes through the screw rod mounting hole and is installed on the screw rod mounting seat 207. Both ends of the screw rod 205 are supported between two side plates 203 of the diameter adjustment mechanism through bearings 206. A second slide groove 217 is arranged at the lower end of the screw rod mounting seat 207, and a second slide rail 216 with a matching inner and outer direction is arranged on the upper surface of the lower bottom plate 204 of the diameter adjustment mechanism, which cooperates with the second slide groove 217. Rotating the screw rod 205 can drive the screw rod mounting seat 207 and the tensioning arc mounting seat 201 to slide forward and backward. After the end of the screw rod 205 passes through the internal diameter adjustment mechanism side plate 203, it passes through the screw rod bearing seat 212 and is connected to a small bevel gear 211. A tension spring 214 is provided between the screw rod bearing seat 212 and the internal diameter adjustment mechanism side plate 203. The end of the screw rod 205 is connected to the internal spline fixing sleeve 208, and the internal spline fixing sleeve 208 is connected to the internal spline sliding sleeve 210 through the spline track 209. The connecting shaft of a small bevel gear 211 passes through the screw rod bearing seat 212 and is fixedly connected to the internal spline sliding sleeve 210. The upper end of the screw rod bearing seat 212 is against the lower surface of the connecting sleeve 12 through a small bevel gear bearing seat mounting bottom plate. The small bevel gear bearing seat mounting bottom plate is sleeved on the main shaft 1401.

[0030] A tensioning power disc 1 is provided at the center of the table bottom plate 5, and a through hole is provided in the middle of the tensioning power disc 1. As shown in FIG. 2, the tensioning power disc 1 includes a circular power disc upper top plate 101, a cylindrical base 103 extending downward from the middle of the power disc upper top plate 101, and 6 active oblique wedges 102 are arranged around the cylindrical base 103, and the active oblique wedges 102 are abutted against the abutment block 213, and the abutment block 213 is fixedly connected to the end of the diameter adjustment mechanism upper top plate 202 of the diameter adjustment mechanism 2. The active oblique wedge 102 abuts against the abutment block 213 to provide tensioning force for the tensioning mechanism. Because the tensioning distance is small, the tensioning diameter section is adjusted by the diameter adjustment mechanism. For example, if the diameter to be tightened is 470, the diameter of the diameter adjustment mechanism is first adjusted to 450 during operation, and the other 20 is to control the active oblique wedge 102 and the abutment block to slide to achieve tension and relaxation by lifting the oil cylinder.

[0031] The main shaft component 14 further includes: a large bevel gear 1404, a gear 1408, a brush 1407, a transmission gear 901, a second motor 9 and a rotary cylinder 11. The large bevel gear 1404 and the gear 1408 are sleeved on the main shaft 1401 from top to bottom, and the rotary cylinder 11 is arranged below the main shaft 1401. The large bevel gear 1404 is meshed with each small bevel gear 211. The second motor 9 drives the transmission gear 901 to rotate, and the transmission gear 901 is meshed with the gear 1408.

[0032] The main shaft 1401 is also provided with an end bearing 1409 and a thrust bearing 1410, and is sleeved with a main shaft bearing seat 13 on the outside, and a base 10 is connected below the main shaft bearing seat 13. The rotating oil cylinder 11 is installed at the bottom of the base 10, and the output shaft and the main shaft 1401 are coaxially arranged. An extension rod 6 is arranged in the through hole in the center of the main shaft 1401, and the lower end of the extension rod 6 is fixedly connected to the output shaft of the rotating oil cylinder 11, and the upper end of the main shaft 1401 passes through the through hole in the center of the tensioning power disk 1, and is fixedly connected to the tensioning power disk 1 through the fixing nut 7. Among them, 1402 / 1403 / 1405 / 1406 are position adjustment nuts.

[0033] Working process: The first motor 8 drives one of the small bevel gears 211A to rotate, and the small bevel gear 211A drives the other small bevel gears 211 to rotate through the transmission effect of the large bevel gear 1404, and drives the screw mounting seat 207 to slide forward and backward on the screw 205 through the transmission effect of the small bevel gear 211, thereby driving the tension arc mounting seat 201 to move forward and backward along the first slide rail 501, changing the inner diameter of the tension ring surrounded by the six tension arcs 3, and achieving the purpose of adjusting the diameter of the circumferential wall of the guide tube. The output shaft of the rotating oil cylinder 11 drives the tensioning power disc 1 to descend, and the active bevel 102 presses the block 213 to drive the entire diameter adjustment mechanism and the tension arc 3 to move outward in the circumferential direction, thereby realizing the tensioning function. The output shaft of the rotating oil cylinder 11 drives the tensioning power disc 1 to rise, the active bevel 102 releases the stop block 213, and the tension spring 214 drives the entire diameter adjustment mechanism and the tensioning arc 3 to move inward in the outer circumferential direction to loosen the tensioning arc 3. The output shaft of the second motor 9 is connected to the gear 901 through the worm gear mechanism, driving the gear 1408 to rotate, thereby realizing the rotation of the entire tensioning mechanism.

[0034] The specific implementation modes of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above implementation modes, and various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. A fan guide tube positioning device, characterized in that: It includes a spindle component and a table bottom plate. The spindle component includes a spindle, and the upper end of the spindle is fixedly connected to the center of the table bottom plate through a connecting sleeve; The upper surface of the table bottom plate is provided with N mounting holes, all of which are evenly arranged around the center of the table bottom plate and extend radially; a tensioning arc is correspondingly provided on the outer side of each mounting hole, and the extension lines of adjacent tensioning arcs are connected to form a tensioning circle; The table bottom plate is provided with a diameter adjustment mechanism at the location of the mounting hole; The diameter adjustment mechanism includes a mounting frame and a first motor. The mounting frame is mounted at the mounting hole and is connected with the corresponding tensioning arc. The first motor drives the mounting frame to slide forward and backward along the mounting hole, thereby changing the inner diameter of the tensioning ring. A large bevel gear is sleeved on the main shaft; The mounting frame comprises an upper plate of the diameter adjusting mechanism, two side plates of the diameter adjusting mechanism respectively abutting against the front and rear ends of the mounting hole, and a lower bottom plate of the diameter adjusting mechanism; A tensioning arc mounting seat is installed on the upper top plate of the diameter adjusting mechanism, the lower side of the tensioning arc mounting seat is slidably connected to the upper top plate of the diameter adjusting mechanism, and the side surface of the tensioning arc mounting seat is matched and connected to the inner side of the tensioning arc; A screw rod mounting seat and a screw rod are arranged at the lower end of the tensioning arc mounting seat, and the screw rod passes through the screw rod mounting seat and the inner side plate of the diameter adjustment mechanism in sequence, and is supported between the main shaft and the outer side plate of the diameter adjustment mechanism; the screw rod mounting seat is slidably connected with the lower bottom plate of the diameter adjustment mechanism; The end of the screw rod is connected to a small bevel gear; The large bevel gear is meshed with all the small bevel gears, the first motor drives one of the small bevel gears to rotate, and the small bevel gear drives the other small bevel gears to rotate through the transmission action of the large bevel gear, and the transmission action of the small bevel gear drives the screw rod mounting seat to slide back and forth on the screw rod, thereby driving the tensioning arc mounting seat to move back and forth along the lower bottom plate of the diameter adjustment mechanism, thereby changing the inner diameter of the tensioning ring.

2. A fan guide tube positioning device according to claim 1, characterized in that: A stop block is provided at the end of the top plate of each diameter adjustment mechanism; A tensioning power disk is provided at the center of the table bottom plate, and the tensioning power disk includes a circular power disk upper plate, a cylindrical base extends downward from the middle of the power disk upper plate, and N active bevels are provided around the cylindrical base, and the active bevels are abutted against corresponding abutment blocks.

3. A fan guide tube positioning device according to claim 2, characterized in that: After the end of the screw rod passes through the inner diameter adjustment mechanism side plate, it passes through a screw rod bearing seat and is connected to the small bevel gear. A tension spring is arranged between the screw rod bearing seat and the inner diameter adjustment mechanism side plate.

4. A fan guide tube positioning device according to claim 2, characterized in that: The main shaft is sleeved with a small bevel gear bearing seat, which is located below the table bottom plate; the upper end of the screw bearing seat is against the lower surface of the small bevel gear bearing seat through a small bevel gear bearing seat mounting bottom plate.

5. A fan guide tube positioning device according to claim 3, characterized in that: The gaps between the adjacent top plates of the diameter adjusting mechanisms are filled with equal-height tables, which are fixedly supported on the table bottom plate by connecting columns; the upper surface of the equal-height tables is flush with the upper surface of the top plates of the diameter adjusting mechanisms.

6. A fan guide tube positioning device according to claim 2, characterized in that: The main shaft component also includes a rotating oil cylinder, which is located at the bottom of the main shaft. The output shaft of the rotating oil cylinder is coaxially arranged with the main shaft to drive the main shaft to rotate.

7. A fan guide tube positioning device according to claim 1, characterized in that: The main shaft component also includes a gear, a transmission gear and a second motor; the gear is located below the large bevel gear and is sleeved on the main shaft; the transmission gear is located on one side of the gear and meshes with the gear; the second motor drives the transmission gear to rotate, thereby driving the gear to rotate.

8. A fan guide tube positioning device according to claim 2, characterized in that: There are 6 diameter adjustment mechanisms distributed on the bottom plate of the table.

9. A fan guide tube positioning device according to claim 7, characterized in that: The first motor is a stepper motor or a servo motor; the second motor is a stepper motor or a servo motor.

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