Checking and correcting table for fan motor mounting bracket

Abstract

The invention relates to an inspection and correction table for a fan motor mounting bracket, which comprises a machine base, a vertical hollow oil cylinder is fixedly connected in the machine base, a vertical guide column sleeve is inserted and fixed in the middle of the machine base, and a vertical clamping traction pipe is inserted in the guide column sleeve. The lower part of the clamping traction pipe is inserted into a center hole of the hollow oil cylinder and is pivoted with the lower end of the piston, the lower end of the clamping traction pipe extends out of the hollow oil cylinder and is pivoted with an air cylinder, a piston rod of the air cylinder is fixedly connected with a pull rod, and the pull rod is inserted into the clamping traction pipe; the inspection bench is fixed to the guide column sleeve in an inserted and sleeved mode, the upper end of the guide column sleeve extends out of the inspection bench to be fixedly connected with a circular clamping table in an inserted mode, the upper end of the clamping traction pipe extends out of the clamping table to be connected with a pressing claw mechanism in a sleeved mode, and the upper end of the pull rod is fixedly connected with a claw stretching mechanism opposite to the pressing claw mechanism. According to the inspection and correction table, the corresponding positioning loading structure and the inspection and correction mechanism are designed according to the structure of the motor support, and inspection and correction of the motor support are conveniently achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of correction inspection platform, more particularly to a kind of inspection correction platform of fan motor mounting bracket. BACKGROUND

[0002] The existing axial flow fan generally includes air guide cylinder, impeller, motor and motor support, the impeller is fixed on the rotating shaft of motor, and the motor is fixed on the air guide cylinder by the motor support, the size structure of motor support has great influence on the position of impeller, so that the motor and the impeller are not in the same horizontal plane, and the motor and the impeller are not in the same horizontal plane. Figure 1 For example, a common motor support is composed of a center ring 501 and a plurality of radial rods 502, the outer end of the radial rod 502 is fixed on the mounting panel of the air guide cylinder by bolts, and the motor is fixed on the center ring 501, if the end of each radial rod 502 is high or low, the motor and the impeller will be inclined, and the impeller may collide with the inner wall of the air guide cylinder during rotation, so it is necessary to inspect each motor support 50, and if the installation position of the radial rod 502 is high or low, it needs to be corrected, and a device for inspection and correction of motor support needs to be designed. SUMMARY

[0003] The present application is aimed at the deficiencies of the prior art, and provides an inspection and correction platform for fan motor mounting bracket, which can conveniently clamp and position the motor support, and facilitate the inspection and correction of the motor support.

[0004] An inspection and correction platform for fan motor mounting bracket, comprising a base, a vertical hollow oil cylinder is fixed in the base, a cylindrical ring-shaped piston is arranged in the hollow oil cylinder, a circular inspection platform is arranged above the base, a vertical guide column sleeve is fixedly connected to the middle of the base, a vertical clamping and pulling pipe is inserted into the guide column sleeve, the lower part of the clamping and pulling pipe is inserted into the center hole of the hollow oil cylinder and is pivotally connected to the lower end of the piston, a cylinder is pivotally connected to the lower end of the clamping and pulling pipe outside the hollow oil cylinder, a piston rod of the cylinder is fixedly connected to a pulling rod, and the pulling rod is inserted into the clamping and pulling pipe; the inspection platform is fixedly connected to the guide column sleeve, a circular clamping platform is fixedly connected to the upper end of the guide column sleeve outside the inspection platform, a pressing jaw mechanism is connected to the clamping and pulling pipe outside the clamping platform, and the upper end of the pulling rod is fixedly connected to a jaw opening mechanism opposite to the pressing jaw mechanism. The clamping platform comprises a circular bearing platform, a plurality of divergent positioning grooves are formed on the outer circle of the upper end surface of the bearing platform, a strip-shaped positioning pad is fixedly connected to the positioning grooves, a plurality of positioning pin holes are formed on the positioning pad, and a positioning pin is inserted into the positioning pin hole. The clamping claw mechanism includes several strip-shaped clamping claws facing the positioning pad block. The strip-shaped clamping claws abut against the outer wall of the clamping and pulling tube. The upper end of the clamping and pulling tube is fixed with a clamping claw connecting seat. Several hinge lugs are formed on the lower end surface of the clamping claw connecting seat. The upper end of the strip-shaped clamping claw is inserted into the hinge lug and a first pin is inserted and fixed on the hinge lug. A limiting seat sleeve opposite to the strip-shaped clamping claw is fixed on the clamping claw connecting seat. The aforementioned claw mechanism includes a cylindrical pulling head fixed to a pull rod. The pulling head has several slots formed inside, penetrating its outer wall and upper surface. An inclined expansion rod is inserted into each slot, and a second pin is inserted into the upper end of the expansion rod. Both ends of the second pin are respectively inserted and fixed to the pulling head. A vertical groove is formed on the inner wall of the clamping pulling tube of the strip-shaped claw. The lower end of the groove has an inclined bottom surface. The lower end of the expansion rod is inserted into the groove of the clamping pulling tube and abuts against the inclined bottom surface of the groove. The upper surface of the inspection table is formed with several radiating guide grooves. The upper surface of the inspection table is provided with an inspection calibration block, which includes an inspection go gauge plane located on the upper surface of the inspection calibration block. A guide block is formed on the lower surface of the inspection calibration block and is inserted into the guide groove of the inspection table. An inspection no-go gauge plane is formed on the upper surface of the inspection calibration block on the side away from the center of the inspection table. The inspection no-go gauge plane is higher than the inspection go gauge plane.

[0005] Preferably, the inspection and calibration table is equipped with a motor bracket, which includes a circular central ring with several positioning holes formed on it. Several L-shaped spokes are welded and fixed on the upper end face of the central ring, and the outer ends of the spokes are bent into horizontal lugs with mounting holes formed on them. The central ring on the motor bracket is fitted onto the clamping and pulling tube and abuts against the upper surface of the positioning pad. The upper ends of the positioning pins are respectively inserted into the positioning holes of the motor bracket.

[0006] Preferably, the base includes a rectangular base plate and a top plate, with columns fixedly connected to the four corners of the top plate, and the lower ends of the columns fixedly connected to the base plate. The hollow hydraulic cylinder is fixed to the lower end surface of the top plate, and the bottom plate has a clearance hole formed in the middle that is directly opposite to the cylinder.

[0007] Preferably, the inspection table includes a lower support plate and an upper support plate in the shape of a ring, and a plurality of ring-shaped connecting blocks are inserted between the lower support plate and the upper support plate. The connecting blocks are fixed to the lower support plate and the upper support plate respectively by bolts. The guide column sleeve has a lower flange ring and an upper flange ring formed on its middle and upper outer walls, respectively. The bearing platform abuts against the upper end face of the upper flange ring and is fixed to the upper flange ring with bolts. The lower support plate abuts against the lower end face of the lower flange ring and is fixed to the lower flange ring with bolts. A supporting cylinder sleeve is sleeved on the guide column sleeve at the lower side of the inspection table, and the upper and lower ends of the supporting cylinder sleeve abut against the inspection table and the base respectively.

[0008] Preferably, the positioning pin holes are linearly and uniformly distributed on the positioning pads, the positioning pads are annularly and uniformly distributed around the central axis of the guide column sleeve, and the inner wall of the guide column sleeve and the outer wall of the clamped pulling pipe are in the same cylindrical surface. The number of the strip-shaped clamping jaws on the clamping jaw mechanism is equal to the number of the expansion rods on the clamping jaw mechanism, and the expansion rods and the strip-shaped clamping jaws are annularly and uniformly distributed around the central axis of the guide column sleeve. A vertical limiting groove is formed on the wall of the clamped pulling pipe, a vertical limiting column is fixedly connected to the outer wall of the pulling head, and the limiting column is inserted into the limiting groove of the clamped pulling pipe.

[0009] Preferably, the thickness of the central ring on the motor support is not less than the width of the expansion rod on the clamping jaw mechanism; and the thickness of the expansion rod is equal to the slot of the clamped pulling pipe. The center distance from the side wall of the strip-shaped clamping jaw away from the clamped pulling pipe to the first pin shaft is equal to the center distance from the lower end surface of the limiting seat sleeve to the first pin shaft.

[0010] Preferably, an L-shaped connecting sleeve is inserted into the lower end of the hollow oil cylinder, a thrust bearing is inserted into the connecting sleeve, the connecting sleeve is sleeved on the clamped pulling pipe, a circular nut is screwed on the clamped pulling pipe, and the thrust bearing is clamped between the circular nut and the connecting sleeve. An L-shaped mounting seat sleeve is sleeved on the lower end of the clamped pulling pipe, a snap ring is inserted into the mounting seat sleeve, the snap ring is clamped and fixed on the clamped pulling pipe, a thrust bearing is connected to the mounting seat sleeve on the upper side of the snap ring, and the lower end of the mounting seat sleeve is fixedly connected to the cylinder body of the air cylinder through bolts.

[0011] The present application has the following advantages: The present application is applicable to the structure of the motor support, and the corresponding positioning and loading structure and the inspection and correction mechanism are designed, so that the inspection and correction of the motor support are facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 The figure is a schematic diagram of the structure of the existing motor support; Figure 2 The figure is a schematic diagram of the three-dimensional structure of the present application; Figure 3 The figure is a schematic diagram of the front view structure of the present application; Figure 4 The figure is a schematic diagram of the local three-dimensional structure of the inspection table part of the present application; Figure 5 The figure is a schematic diagram of the half-section structure of the present application Figure 6 The figure is a schematic diagram of the half-section structure of the present applicationFigure 5 Local enlarged view at A in the middle; Figure 7 Schematic view of the state of the invention for the expansion of the clamping jaw; Figure 8 Schematic view of the state of the invention for clamping the motor support; Figure 9 Schematic view of the state of the invention for testing.

[0013] In the figure: 1, base; 2, hollow oil cylinder; 3, clamping pulling pipe; 4, guide column sleeve; 5, testing table; 6, clamping table; 7, clamping jaw mechanism; 8, clamping jaw mechanism; 9, testing and correcting block; 10, limiting seat sleeve; 20, pulling rod; 30, air cylinder; 40, support cylinder sleeve; 50, motor support. DETAILED DESCRIPTION

[0014] Embodiment: see Figures 2 to 6 As shown in the figure, a testing and correcting table for a fan motor mounting support, comprising a base 1, a vertical hollow oil cylinder 2 is fixedly connected in the base 1, a cylindrical ring-shaped piston 21 is arranged in the hollow oil cylinder 2, a circular testing table 5 is arranged above the base 1, a vertical guide column sleeve 4 is inserted and fixed in the middle of the base 1, a vertical clamping pulling pipe 3 is inserted in the guide column sleeve 4, the lower part of the clamping pulling pipe 3 is inserted in the center hole of the hollow oil cylinder 2 and is pivotally connected with the lower end of the piston 21, the lower end of the clamping pulling pipe 3 extends out of the hollow oil cylinder 2 and is pivotally connected with an air cylinder 30, the piston rod of the air cylinder 30 is fixedly connected with a pulling rod 20, and the pulling rod 20 is inserted in the clamping pulling pipe 3; the testing table 5 is inserted and fixed on the guide column sleeve 4, the upper end of the guide column sleeve 4 extends out of the testing table 5 and is inserted and fixed with a circular clamping table 6, the upper end of the clamping pulling pipe 3 extends out of the clamping table 6 and is sleeved with a clamping jaw mechanism 7, and the upper end of the pulling rod 20 is fixedly connected with a clamping jaw mechanism 8 opposite to the clamping jaw mechanism 7; The clamping table 6 comprises a circular bearing table 61, a plurality of diverging positioning grooves 611 are formed on the outer circle of the upper end surface of the bearing table 61, strip-shaped positioning pads 62 are inserted and fixed in the positioning grooves 611, a plurality of positioning pin holes 621 are formed on the positioning pads 62, and positioning pins 63 are inserted in the positioning pin holes 621; as Figure 4 As shown in the figure, the positioning grooves 611 are provided with six rows, four of which are provided with annularly and uniformly distributed positioning pads 62, which are for the motor support 50 of the four spoke shafts 502, and the other two rows of the positioning grooves 611 are empty, but can form three groups of annularly and uniformly distributed grooves with the four groups of positioning grooves 611 before, so as to be for the motor support 50 of the three spoke shafts 502; The pressure claw mechanism 7 includes several strip-shaped pressure claws 72 facing the positioning pad 62. The strip-shaped pressure claws 72 abut against the outer wall of the clamping and pulling tube 3. The upper end of the clamping and pulling tube 3 is fitted with a pressure claw connecting seat 71. Several hinge lugs 711 are formed on the lower end surface of the pressure claw connecting seat 71. The upper end of the strip-shaped pressure claw 72 is inserted into the hinge lug 711 and a first pin 73 is inserted and fixed on the hinge lug 711. A limiting seat 10 opposite to the strip-shaped pressure claw 72 is fitted and fixed on the pressure claw connecting seat 71. The aforementioned claw mechanism 8 includes a cylindrical pulling head 81 fixed to the pull rod 20. The pulling head 81 has several slots 811 formed inside, penetrating the outer wall and upper end face of the pulling head 81. An obliquely placed expansion rod 82 is inserted into the slot 811. A second pin 83 is inserted into the upper end of the expansion rod 82. The two ends of the second pin 83 are respectively inserted and fixed to the pulling head 81. The inner side of the strip-shaped pressure claw 72 has a vertical groove 31 formed on the wall of the clamping pulling tube 3. The lower end of the groove 31 has an oblique bottom surface. The lower end of the expansion rod 82 is inserted into the groove 31 of the clamping pulling tube 3 and abuts against the oblique bottom surface of the groove 31. The upper surface of the inspection table 5 is formed with several diverging guide grooves 521. The upper surface of the inspection table 5 is provided with an inspection calibration block 9. The inspection calibration block 9 includes an inspection go gauge plane 91 located on the upper surface of the inspection calibration block 9. A guide block 93 is formed on the lower surface of the inspection calibration block 9. The guide block 93 is inserted into the guide groove 521 of the inspection table 5. An inspection stop gauge plane 92 is formed on the upper surface of the inspection calibration block 9 on the side away from the center of the inspection table 5. The inspection stop gauge plane 92 is higher than the inspection go gauge plane 91.

[0015] like Figure 1 , 5 As shown, the inspection and calibration table is equipped with a motor bracket 50. The motor bracket 50 includes a circular central ring 501. The central ring 501 has a plurality of positioning holes 5011 formed thereon. A plurality of L-shaped spokes 502 are welded and fixed on the upper end surface of the central ring 501. The outer ends of the spokes 502 are bent into horizontal lugs 5021. The lugs 5021 have mounting holes 5022 formed thereon. The central ring 501 on the motor bracket 50 is sleeved on the clamping and pulling tube 3 and abuts against the upper end surface of the positioning pad 62. The upper ends of the positioning pins 63 are respectively inserted into the positioning holes 5011 of the motor bracket 50. The middle part of the inspection and calibration block 9 can be provided with a central positioning groove 94 to correspond to the mounting hole 5022 on the spoke 502. A pin can be inserted into the mounting hole 5022, and the lower end of the pin is inserted into the central positioning groove 94 of the inspection and calibration block 9. Thus, the spoke 502 is adjusted when the motor bracket 50 is calibrated by the inspection and calibration block 9.

[0016] The base 1 includes a rectangular base plate 11 and a top plate 12. Columns 13 are fixed to the four corners of the top plate 12, and the lower ends of the columns 13 are fixed to the base plate 11. The hollow oil cylinder 2 is fixed to the lower end surface of the top plate 12, and the bottom plate 11 has a clearance hole formed in the middle that is directly opposite to the cylinder 30.

[0017] The inspection table 5 includes a circular lower support plate 51 and an upper support plate 52. A plurality of circularly distributed connecting blocks 53 are inserted between the lower support plate 51 and the upper support plate 52. The connecting blocks 53 are fixedly connected to the lower support plate 51 and the upper support plate 52 by bolts. The guide column sleeve 4 has a lower flange ring 41 and an upper flange ring 42 formed on the outer wall of the middle and upper parts respectively. The bearing platform 61 abuts against the upper end face of the upper flange ring 42 and is fixed to the upper flange ring 42 with bolts. The lower support plate 51 abuts against the lower end face of the lower flange ring 41 and is fixed to the lower flange ring 41 with bolts. A support sleeve 40 is fitted on the guide column sleeve 4 on the lower side of the inspection table 5, and the upper and lower ends of the support sleeve 40 abut against the inspection table 5 and the machine base 1, respectively.

[0018] The positioning pin holes 621 are linearly and evenly distributed on the positioning pad 62. The positioning pad 62 is evenly distributed in a ring around the central axis of the guide sleeve 4. The inner wall of the guide sleeve 4 and the outer wall of the clamping and pulling tube 3 are in the same cylindrical surface. The number of strip-shaped pressure claws 72 on the pressure claw mechanism 7 is equal to the number of expansion rods 82 on the claw opening mechanism 8. Both the expansion rods 82 and the strip-shaped pressure claws 72 are evenly distributed in a ring around the central axis of the guide column sleeve 4. The clamping and pulling tube 3 has a vertical limiting groove 32 formed on its tube wall, and a vertical limiting post 812 is fixed to the outer wall of the pulling head 81. The limiting post 812 is inserted into the limiting groove 32 of the clamping and pulling tube 3, and the limiting post 812 is used to limit the rotation of the pulling head 81.

[0019] The thickness of the central ring 501 on the motor bracket 50 is not less than the width of the expansion rod 82 on the claw mechanism 8; the width of the expansion rod 82 refers to the distance between the left and right side walls of the expansion rod 82; the thickness of the expansion rod 82 is equal to the slot 31 on the clamping and pulling tube 3. The center distance between the strip-shaped pressure claw 72 and the first pin 73 on the side wall away from the clamping and pulling tube 3 is equal to the center distance between the lower end face of the limiting seat 10 and the first pin 73. Therefore, when the strip-shaped pressure claw 72 is flipped to a horizontal position, it will abut against the limiting seat 10 to limit the rotation of the strip-shaped pressure claw 72.

[0020] The lower end of the piston 21 on the hollow cylinder 2 is connected to a connecting sleeve with an L-shaped cross section. A thrust bearing is inserted into the connecting sleeve and is sleeved on the clamping and pulling tube 3. A round nut is screwed onto the clamping and pulling tube 3, and the thrust bearing is clamped between the round nut and the connecting sleeve; that is, the pivotal structure between the hollow cylinder 2 and the clamping and pulling tube 3.

[0021] The lower end of the clamping and pulling tube 3 is fitted with an L-shaped mounting sleeve, and a retaining ring is inserted inside the mounting sleeve. The retaining ring is fixed to the clamping and pulling tube 3. Thrust bearings are inserted and connected inside the mounting sleeves on the upper side of the retaining ring. The lower end of the mounting sleeve is fixed to the cylinder body of the cylinder 30 by bolts. That is, the cylinder 30 and the clamping and pulling tube 3 are pivotally connected.

[0022] Working principle: This structure is an inspection and calibration table for the fan motor mounting bracket; like Figure 5 As shown, the motor bracket 50 can be directly sleeved onto the clamping and pulling tube 3 and abutted against the clamping table 6, and is positioned and connected to the clamping table 6 by the positioning pin 63. Then, cylinder 30 is activated, and the piston rod of cylinder 30 retracts, causing the pulling head 81 on the claw mechanism 8 to move downward. This causes the strip-shaped pressure claw 72 to flip and extend out of the slot 31, abutting against the strip-shaped pressure claw 72 of the pressure claw mechanism 7. This causes the strip-shaped pressure claw 72 to flip from vertical to horizontal. Figure 7 As shown; Next, the hollow hydraulic cylinder 2 is activated, which drives the piston 21 to move downward, pulling the clamping and pulling tube 3 downward. This causes the strip-shaped clamping claw 72 to press against the central ring 501 of the motor bracket 50, completing the clamping and positioning of the motor bracket 50. Figure 8 As shown; Next, move the inspection and calibration block 9, as follows: Figure 9 As shown, if the inspection go gauge plane 91 of the inspection calibration block 9 can pass under the spoke 502, but the inspection no-go gauge plane 92 cannot pass, then it is qualified. If the inspection gauge plane 91 cannot pass through the spoke 502, it means that the position of the spoke 502 is too low. The spoke 502 can be manually raised to correct it until the inspection gauge plane 91 passes through the bottom surface of the lug 5021 on the spoke 502. When the bottom surface of the lug 5021 on the spoke 502 passes through the inspection no-go gauge plane 92, the spoke 502 can be manually lowered to correct it until the inspection go gauge plane 91 can pass through the bottom surface of the lug 5021 on the spoke 502, while the inspection no-go gauge plane 92 cannot pass through.

[0023] The embodiments described are illustrative of the invention and are not intended to limit the invention. Any person skilled in the art can modify the embodiments without departing from the spirit and scope of the invention; therefore, the scope of protection of the invention should be as set forth in the claims.

Claims

1. An inspection and calibration table for a fan motor mounting bracket, comprising a base (1), a vertical hollow oil cylinder (2) fixedly connected inside the base (1), a cylindrical annular piston (21) provided inside the hollow oil cylinder (2), and a circular inspection table (5) provided above the base (1), characterized in that: A vertical guide sleeve (4) is inserted and fixed in the middle of the base (1). A vertical clamping and pulling tube (3) is inserted inside the guide sleeve (4). The lower part of the clamping and pulling tube (3) is inserted into the center hole of the hollow oil cylinder (2) and pivotally connected to the lower end of the piston (21). The lower end of the clamping and pulling tube (3) extends out of the hollow oil cylinder (2) and is pivotally connected to a cylinder (30). The piston rod of the cylinder (30) is fixedly connected to a pull rod (20). The pull rod (20) is inserted into the clamping and pulling tube (3); the inspection table (5) is fixed on the guide column sleeve (4), the upper end of the guide column sleeve (4) extends out of the inspection table (5) and is inserted and fixed with a circular clamping table (6), the upper end of the clamping and pulling tube (3) extends out of the clamping table (6) and is sleeved and connected with a pressure claw mechanism (7), and the upper end of the pull rod (20) is fixedly connected with a claw opening mechanism (8) opposite to the pressure claw mechanism (7); The clamping platform (6) includes a circular support platform (61). The outer ring of the upper surface of the support platform (61) is formed with several divergent positioning grooves (611). A strip-shaped positioning pad (62) is inserted and fixed in the positioning groove (611). Several positioning pin holes (621) are formed on the positioning pad (62). A positioning pin (63) is inserted into the positioning pin hole (621). The pressure claw mechanism (7) includes several strip-shaped pressure claws (72) facing the positioning pad (62). The strip-shaped pressure claws (72) abut against the outer wall of the clamping and pulling tube (3). The upper end of the clamping and pulling tube (3) is fixed with a pressure claw connecting seat (71). Several hinge ears (711) are formed on the lower end surface of the pressure claw connecting seat (71). The upper end of the strip-shaped pressure claw (72) is inserted into the hinge ear (711) and a first pin (73) is inserted into it. The first pin (73) is inserted into and fixed on the hinge ear (711). A limiting seat (10) opposite to the strip-shaped pressure claw (72) is fixed on the pressure claw connecting seat (71). The claw mechanism (8) includes a cylindrical pulling head (81) fixed to the pull rod (20). The pulling head (81) has several slots (811) formed inside, which penetrate the outer wall and the upper end face of the pulling head (81). An inclined expansion rod (82) is inserted into the slot (811). A second pin (83) is inserted into the upper end of the expansion rod (82). The two ends of the second pin (83) are respectively inserted and fixed on the pulling head (81). A vertical slot (31) is formed on the wall of the clamping pulling tube (3) inside the strip-shaped pressure claw (72). The lower end of the slot (31) is formed with an inclined bottom surface. The lower end of the expansion rod (82) is inserted into the slot (31) of the clamping pulling tube (3) and abuts against the inclined bottom surface of the slot (31). The upper surface of the inspection table (5) is formed with several divergent guide grooves (521). The upper surface of the inspection table (5) is provided with an inspection calibration block (9). The inspection calibration block (9) includes an inspection go gauge plane (91) located on the upper surface of the inspection calibration block (9). A guide block (93) is formed on the lower surface of the inspection calibration block (9). The guide block (93) is inserted into the guide groove (521) of the inspection table (5). An inspection stop gauge plane (92) is formed on the upper surface of the inspection calibration block (9) on the side away from the center of the inspection table (5). The inspection stop gauge plane (92) is higher than the inspection go gauge plane (91).

2. The inspection and calibration table for a fan motor mounting bracket according to claim 1, characterized in that: The inspection and calibration table is equipped with a motor bracket (50). The motor bracket (50) includes a circular central ring (501). The central ring (501) has several positioning holes (5011). Several L-shaped spokes (502) are welded and fixed on the upper end surface of the central ring (501). The outer end of the spokes (502) is bent into a horizontal lug (5021). The lug (5021) has a mounting hole (5022). The central ring (501) on the motor bracket (50) is sleeved on the clamping traction tube (3) and abuts against the upper end surface of the positioning pad (62). The upper ends of the positioning pins (63) are respectively inserted into the positioning holes (5011) of the motor bracket (50).

3. The inspection and calibration table for a fan motor mounting bracket according to claim 1, characterized in that: The base (1) includes a rectangular base plate (11) and a top plate (12). Columns (13) are fixed to the four corners of the top plate (12), and the lower ends of the columns (13) are fixed to the base plate (11). The hollow cylinder (2) is fixed to the lower end surface of the top plate (12), and the bottom plate (11) has a clearance hole in the middle that is directly opposite to the cylinder (30).

4. The inspection and calibration table for a fan motor mounting bracket according to claim 1, characterized in that: The inspection table (5) includes a circular lower support plate (51) and an upper support plate (52). A number of circularly distributed connecting blocks (53) are inserted between the lower support plate (51) and the upper support plate (52). The connecting blocks (53) are fixedly connected to the lower support plate (51) and the upper support plate (52) by bolts respectively. The guide column sleeve (4) has a lower flange ring (41) and an upper flange ring (42) formed on the outer wall of the middle and upper parts respectively. The bearing platform (61) abuts against the upper end face of the upper flange ring (42) and is fixed to the upper flange ring (42) with bolts. The lower support plate (51) abuts against the lower end face of the lower flange ring (41) and is fixed to the lower flange ring (41) with bolts. A support sleeve (40) is fitted on the guide column sleeve (4) on the lower side of the inspection table (5), and the upper and lower ends of the support sleeve (40) abut against the inspection table (5) and the machine base (1) respectively.

5. The inspection and calibration table for a fan motor mounting bracket according to claim 1, characterized in that: The positioning pin holes (621) are linearly and uniformly distributed on the positioning pad (62), and the positioning pad (62) is evenly distributed in a ring around the central axis of the guide sleeve (4). The inner wall of the guide sleeve (4) and the outer wall of the clamping pulling tube (3) are in the same cylindrical surface. The number of strip-shaped pressure claws (72) on the pressure claw mechanism (7) is equal to the number of expansion rods (82) on the claw opening mechanism (8). Both the expansion rods (82) and the strip-shaped pressure claws (72) are evenly distributed in a ring around the central axis of the guide column sleeve (4). The clamping and pulling tube (3) has a vertical limiting groove (32) formed on its tube wall, and a vertical limiting post (812) is fixed on the outer wall of the pulling head (81). The limiting post (812) is inserted into the limiting groove (32) of the clamping and pulling tube (3).

6. The inspection and calibration table for a fan motor mounting bracket according to claim 2, characterized in that: The thickness of the central ring (501) on the motor bracket (50) is not less than the width of the expansion rod (82) on the claw mechanism (8); the thickness of the expansion rod (82) is equal to the groove (31) on the clamping traction tube (3); The center distance between the strip-shaped pressure claw (72) away from the side wall of the clamping traction tube (3) and the first pin (73) is equal to the center distance between the lower end face of the limiting seat (10) and the first pin (73).

7. The inspection and calibration table for a fan motor mounting bracket according to claim 1, characterized in that: The lower end of the piston (21) of the hollow cylinder (2) is connected to a connecting sleeve with an L-shaped cross section. A thrust bearing is inserted in the connecting sleeve and sleeved on the clamping and pulling tube (3). A round nut is screwed on the clamping and pulling tube (3), and the thrust bearing is clamped between the round nut and the connecting sleeve. The lower end of the clamping and pulling tube (3) is fitted with an L-shaped mounting sleeve. A retaining ring is inserted inside the mounting sleeve and is fixed on the clamping and pulling tube (3). Thrust bearings are inserted and connected inside the mounting sleeve on the upper side of the retaining ring. The lower end of the mounting sleeve is fixed to the cylinder body of the cylinder (30) by bolts.

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