Tool for pulling out impeller of dust removal fan

Abstract

The utility model relates to a tool for pulling out an impeller of a dust removal fan, the dust removal fan comprises the impeller and a motor shaft, the end face of the motor shaft is provided with a threaded hole, the motor shaft is inserted into a hub of the impeller and is in interference fit with the hub, and the central axis of the threaded hole coincides with the central axis of the hub; the tool for pulling out the impeller of the dust removal fan comprises a jackscrew bolt, a fixing sleeve and a fixing bolt and is used for separating the impeller from a motor shaft. The fixed sleeve is sleeved on the hub and is in clearance fit with the hub; a plurality of threaded through holes I are formed in the circumferential face of the fixing sleeve, and the fixing bolts are connected with the threaded through holes I in a threaded fit mode and abut against the hub. A threaded through hole II is formed in the bottom of the fixed sleeve; and threads are arranged on the peripheral surface of the jackscrew bolt and are in threaded fit connection with the threaded through hole II. The utility model has the advantages of simple structure, no damage to the threaded hole of the motor shaft due to the shaft head cushion block, convenience in use, convenience in disassembly and assembly of the impeller, and capability of disassembly and assembly of the impeller without a fixing hole, and the installation and use can be completed by one person.

Description

Technical Field

[0001] The utility model belongs to the technical field of dust removal fans and relates to a tool for pulling out an impeller of a dust removal fan. Background Art

[0002] The dust removal fan is an important equipment in the solid phase viscosity production. Due to the particularity of the design and assembly of its impeller and motor shaft, when the motor bearing of the dust removal fan is damaged and needs to be repaired or replaced, the impeller and motor shaft cannot be separated using an ordinary puller, making it impossible to replace the motor bearing.

[0003] In order to solve the above problems, Chinese patent CN208773448U provides a dust removal fan impeller extraction device, including a circular fixing disk, a force adjustment screw and a plurality of workpiece fixing bolts, an adjustment threaded hole matching the force adjustment screw is provided at the central position of the circular fixing disk, and a plurality of groups of bolt fixing grooves of different sizes are provided on the disk surface of the circular fixing disk, each group includes two bolt fixing grooves of the same size and shape, and the two bolt fixing grooves in each group are symmetrically arranged on the disk surface of the circular fixing disk; the number of workpiece fixing bolts is the same as the number of bolt fixing grooves, and every two workpiece fixing bolts form a group, and the size of each group of workpiece fixing bolts matches one of the groups of bolt fixing grooves; when in use, the workpiece fixing bolts are correspondingly inserted into the adjustment threaded holes, one of the groups of workpiece fixing bolts is inserted into a group of bolt fixing grooves matching it, and fixed by fixing bolt washers, but this technical solution cannot perform extraction operations on impellers without fixing holes and motor shafts.

[0004] Chinese patent CN205089694U provides a fan impeller disassembler for disassembling and assembling the fan impeller, including a fixing hoop, a fixing block, a push rod, and an installation block. However, the assembly of the parts of this technical solution is cumbersome and inconvenient to use.

[0005] Therefore, it is of great significance to study a dust removal fan impeller extraction tool to solve the above problems. Utility Model Content

[0006] The utility model aims to solve the problems existing in the prior art and provides a tool for extracting the impeller of a dust removal fan.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0008] A dust removal fan impeller extraction tool, the dust removal fan comprises an impeller and a motor shaft, the end face of the motor shaft is provided with a threaded hole, the motor shaft is inserted into the impeller hub, and has an interference fit with the hub, and the central axis of the threaded hole coincides with the central axis of the hub; the dust removal fan impeller extraction tool is used to separate the impeller and the motor shaft, and the dust removal fan impeller extraction tool comprises a jackscrew bolt, a fixing sleeve and a fixing bolt;

[0009] The fixed sleeve is sleeved on the wheel hub and has clearance fit with the wheel hub;

[0010] A plurality of threaded through holes I are provided on the circumferential surface of the fixing sleeve, and the fixing bolts are threadably connected with the threaded through holes I and support the wheel hub;

[0011] A threaded through hole II is provided at the bottom of the fixing sleeve; a thread is provided on the circumference of the top screw bolt, which is threadedly connected with the threaded through hole II;

[0012] When the top screw bolt presses against the end face of the motor shaft, the maximum distance between the side of the hub away from the top screw bolt and the side of the motor shaft close to the top screw bolt is less than the thread length of the remaining section of the top screw bolt (i.e. the part not inserted into the threaded through hole II).

[0013] When the impeller and the motor shaft are to be separated, the hub of the impeller is fixed, and the top screw bolt is rotated in the threaded through hole II and presses against the end face of the motor shaft until the motor shaft is pushed out.

[0014] As the preferred technical solution:

[0015] The above-mentioned tool for extracting the impeller of a dust removal fan further comprises a shaft head spacer;

[0016] The shaft head pad is provided with a threaded rod, which is connected with the threaded hole (that is, the shaft head pad is arranged on the end face of the motor shaft);

[0017] Along the direction perpendicular to the central axis of the threaded hole, the diameter of the maximum circumscribed circle of the cross section of the shaft head pad is smaller than the diameter of the hole of the interference fit between the wheel hub and the motor shaft;

[0018] The fixed sleeve is sleeved on the wheel hub and the shaft head spacer, and is matched with the wheel hub clearance;

[0019] The circumference of the top screw bolt is provided with threads, which are connected with the threads of the threaded through hole II. The shaft head pad is added to protect the motor shaft and the top screw bolt from damage.

[0020] When the jacking bolt supports the end face of the motor shaft through the shaft head pad, the maximum distance between the side of the wheel hub away from the jacking bolt and the side of the motor shaft close to the jacking bolt is less than the remaining thread length of the jacking bolt.

[0021] When the impeller and the motor shaft are to be separated, the jackscrew bolt rotates in the threaded through hole II and presses against the shaft head spacer until the motor shaft is pushed out.

[0022] In the dust removal fan impeller extraction tool as described above, the shaft head pad is a cylindrical structure, and the threaded rod is arranged on a bottom surface of the cylinder.

[0023] In the dust removal fan impeller extraction tool as described above, the length of the threaded rod is the same as the depth of the threaded hole; the diameter of the shaft head pad is 3 to 5 mm smaller than the diameter of the motor shaft; and the length of the shaft head pad is 10 to 15 mm.

[0024] As described above, in a dust removal fan impeller extraction tool, four evenly distributed threaded through holes I are provided on the circumference of the fixed sleeve; the depth of the fixed sleeve is 5 to 8 mm greater than the sum of the lengths of the hub and the shaft head spacer.

[0025] As described above, a dust removal fan impeller extraction tool has a conical groove at the center of the other bottom surface of the cylinder; one end of the top screw bolt is a conical structure that matches the conical groove. When in use, it is pushed into the conical groove and will not deviate during the application of force. The other end of the top screw bolt is a hexagonal head, which is convenient for the wrench to clamp and apply force.

[0026] In the dust removal fan impeller extraction tool as described above, the central axis of the threaded through hole II coincides with the central axis of the fixed sleeve.

[0027] In the dust removal fan impeller extraction tool as described above, the difference between the outer diameter and the inner diameter of the fixed sleeve is 20 to 30 mm.

[0028] Beneficial effects:

[0029] (1) The utility model has a simple structure and is easy to use. It can be installed and used by one person. It is easy to disassemble and assemble the impeller, and can disassemble and assemble the impeller without a fixing hole.

[0030] (2) The utility model is a dust removal fan impeller extraction tool with a shaft head pad that will not damage the threaded hole of the motor shaft, avoids the use of brute force to disassemble and assemble the impeller, thereby damaging the impeller, improves work efficiency, and saves manpower and material resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a front view of the fixed sleeve of the utility model;

[0032] Figure 2 It is a left side view of the fixed sleeve of the utility model;

[0033] Figure 3 This is a front assembly diagram of the fixing sleeve and fixing bolt of the utility model;

[0034] Figure 4 This is the front view of the shaft head pad of the utility model;

[0035] Figure 5 This is the left side view of the shaft head pad of the utility model;

[0036] Figure 6 This is a schematic diagram of the assembly and use of the utility model;

[0037] Among them, 1-shaft head gasket, 2-top screw bolt, 3-fixing sleeve, 4-fixing bolt, 5-motor shaft, 6-impeller. DETAILED DESCRIPTION

[0038] The present invention is further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application.

[0039] A dust removal fan impeller extraction tool, such as Figure 6 As shown, the dust removal fan includes an impeller 6 and a motor shaft 5. The end face of the motor shaft 5 is provided with a threaded hole. The motor shaft 5 is inserted into the hub of the impeller 6 and has an interference fit with the hub. The central axis of the threaded hole coincides with the central axis of the hub. The impeller extraction tool for the dust removal fan is used to separate the impeller 6 and the motor shaft 5. The impeller extraction tool for the dust removal fan includes a shaft head spacer 1, a top screw bolt 2, a fixing sleeve 3 and a fixing bolt 4.

[0040] like Figure 4-5 As shown, the shaft head spacer 1 is a cylindrical structure, and a threaded rod is provided on the shaft head spacer 1. The threaded rod is arranged on a bottom surface of the cylinder and is connected with the threaded hole;

[0041] A conical groove is provided at the center of the other bottom surface of the cylinder; one end of the top screw bolt 2 is a conical structure, matching the conical groove, and the other end of the top screw bolt 2 is a hexagonal head;

[0042] The length of the threaded rod is the same as the depth of the threaded hole; the diameter of the shaft head pad 1 is 3 to 5 mm smaller than the diameter of the motor shaft 5; the length of the shaft head pad 1 is 10 to 15 mm;

[0043] Along the direction perpendicular to the central axis of the threaded hole, the diameter of the maximum circumscribed circle of the cross section of the shaft head pad 1 is smaller than the diameter of the hole of the interference fit between the wheel hub and the motor shaft 5;

[0044] The fixed sleeve 3 is sleeved on the wheel hub and the shaft head pad 1, and the depth of the fixed sleeve 3 is 5 to 8 mm greater than the sum of the lengths of the wheel hub and the shaft head pad 1; the difference between the outer diameter and the inner diameter of the fixed sleeve 3 is 20 to 30 mm;

[0045] like Figure 1 to Figure 3 As shown, four evenly distributed threaded through holes I are provided on the circumference of the fixing sleeve 3, and the fixing bolts 4 are threadedly connected with the threaded through holes I and support the wheel hub;

[0046] A threaded through hole II is provided at the bottom of the fixing sleeve 3, and the central axis of the threaded through hole II coincides with the central axis of the fixing sleeve 3; a thread is provided on the circumference of the top screw bolt 2, and is threadedly connected with the threaded through hole II;

[0047] When the jacking bolt is supported against the end face of the motor shaft 5 through the shaft head spacer 1 , the maximum distance between the side of the wheel hub away from the jacking bolt 2 and the side of the motor shaft 5 close to the jacking bolt 2 is less than the remaining thread length of the jacking bolt 2 .

[0048] Specific usage process: when the impeller 6 and the motor shaft 5 are to be separated, first screw the threaded rod on the shaft head block 1 into the threaded hole of the motor shaft 5 until the threaded rod enters the threaded hole completely and stops, then put the fixing sleeve 3 on the hub of the impeller 6, screw the fixing bolt 4 through the threaded through hole I on the fixing sleeve 3, and fix it with a wrench to fix the hub, thereby fixing the impeller 6; then screw the top screw bolt 2 into the threaded through hole II at the bottom of the fixing sleeve 3, so that its conical structure is pushed into the conical groove of the shaft head block 1, clamp the hexagonal head of the top screw bolt 2 with a wrench, and apply force clockwise, so that the impeller 6 and the motor shaft 5 are gradually separated and fall off, thereby completing the maintenance work.

Claims

1. A dust removal fan impeller extraction tool, the dust removal fan comprises an impeller (6) and a motor shaft (5), the end surface of the motor shaft (5) is provided with a threaded hole, the motor shaft (5) is inserted into the hub of the impeller (6) and has an interference fit with the hub, and the central axis of the threaded hole coincides with the central axis of the hub; the dust removal fan impeller extraction tool is used to separate the impeller (6) and the motor shaft (5), and is characterized in that: The dust removal fan impeller extraction tool comprises a top screw bolt (2), a fixing sleeve (3) and a fixing bolt (4); The fixed sleeve (3) is sleeved on the wheel hub and has clearance fit with the wheel hub; A plurality of threaded through holes I are provided on the circumferential surface of the fixing sleeve (3), and the fixing bolts (4) are threadably connected to the threaded through holes I and support the wheel hub; The bottom of the fixing sleeve (3) is provided with a threaded through hole II; the peripheral surface of the top screw bolt (2) is provided with threads, which are threadedly matched and connected with the threaded through hole II; When the top screw bolt (2) presses against the end face of the motor shaft (5), the maximum distance between the side of the wheel hub away from the top screw bolt (2) and the side of the motor shaft (5) close to the top screw bolt (2) is less than the thread length of the remaining section of the top screw bolt (2).

2. A dust removal fan impeller extraction tool according to claim 1, characterized in that: Also includes a shaft head spacer (1); A threaded rod is provided on the shaft head pad (1) and is connected with the threaded hole; Along a direction perpendicular to the central axis of the threaded hole, the diameter of the maximum circumscribed circle of the cross section of the shaft head pad (1) is smaller than the diameter of the hole of the interference fit between the wheel hub and the motor shaft (5); The fixed sleeve (3) is sleeved on the wheel hub and the shaft head spacer (1) and is clearance-matched with the wheel hub; The circumferential surface of the top screw bolt (2) is provided with threads, which are threadedly matched with the threaded through hole II; When the top screw bolt is pressed against the end face of the motor shaft (5) through the shaft head pad (1), the maximum distance between the side of the wheel hub away from the top screw bolt (2) and the side of the motor shaft (5) close to the top screw bolt (2) is less than the remaining thread length of the top screw bolt (2).

3. A dust removal fan impeller extraction tool according to claim 2, characterized in that: The shaft head pad (1) is a cylindrical structure, and the threaded rod is arranged on a bottom surface of the cylinder.

4. A dust removal fan impeller extraction tool according to claim 3, characterized in that: The length of the threaded rod is the same as the depth of the threaded hole; the diameter of the shaft head pad (1) is 3 to 5 mm smaller than the diameter of the motor shaft (5); and the length of the shaft head pad (1) is 10 to 15 mm.

5. A dust removal fan impeller extraction tool according to claim 4, characterized in that: The peripheral surface of the fixed sleeve (3) is provided with four evenly distributed threaded through holes I; the depth of the fixed sleeve (3) is 5 to 8 mm greater than the sum of the lengths of the wheel hub and the shaft head pad (1).

6. A dust removal fan impeller extraction tool according to claim 3, characterized in that: A conical groove is arranged at the center of the other bottom surface of the cylinder; one end of the top screw bolt is a conical structure matched with the conical groove, and the other end of the top screw bolt is a hexagonal head.

7. A dust removal fan impeller extraction tool according to claim 1, characterized in that: The central axis of the threaded through hole II coincides with the central axis of the fixing sleeve (3).

8. A dust removal fan impeller extraction tool according to claim 1, characterized in that: The difference between the outer diameter and the inner diameter of the fixed sleeve (3) is 20 to 30 mm.

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