Auxiliary device for tightening locking nut of belt pulley of alternating current motor

Abstract

The invention discloses an alternating current motor belt pulley locking nut tightening auxiliary device which comprises a base, a base and a bottom plate, the base is fixed to the base, and the bottom plate is provided with a first supporting and positioning mechanism and a second supporting and positioning mechanism; the locking mechanism comprises an upper connecting plate, a lower connecting plate, a lead screw component, a guide shaft, a fixed shaft sleeve and a sleeve, one end of the guide shaft is fixedly connected with the upper connecting plate, the other end of the guide shaft is fixedly connected with the base, one end of the lead screw component is fixedly connected with the upper connecting plate, and the other end of the lead screw component is movably connected with the lower connecting plate; one end of the fixing shaft sleeve is fixedly connected with the lower connecting plate, the other end of the fixing shaft sleeve is in transition fit with a rotor shaft of the alternating-current generator, the sleeve is sleeved on the fixing shaft sleeve, the sleeve is in clearance fit with the fixing shaft sleeve, and the sleeve is in transition fit with a belt pulley locking nut of the alternating-current generator. The device is simple in structure and convenient to operate, and the assembly efficiency and the assembly quality of the alternating-current generator are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of alternator assembly aids, and particularly to an auxiliary device for tightening the locking nut of the belt pulley of an AC motor. Background Art

[0002] In the prior art, the fan blade of an alternator is usually installed on the rotor shaft, and the belt pulley of the alternator is also installed on the rotor shaft. During the assembly process, the fan blade needs to be installed first and then the belt pulley. However, when tightening the locking nut of the belt pulley, the rotor shaft and the fan blade will rotate together, resulting in the inability to tighten the locking nut of the belt pulley. The current solution is to use a special tooling to clamp the fan blade, so that the rotor shaft and the fan blade do not rotate together to calibrate the tightening force of the locking nut of the belt pulley. However, this solution requires disassembling the alternator to use the special tooling to clamp the fan blade, and it is easy to damage the fan blade when the tooling clamps the fan blade. Therefore, using this solution to tighten the nut of the alternator not only wastes time, but also there are great quality hazards for the alternator. Summary of the Invention

[0003] In view of the deficiencies of the prior art, the present invention provides an auxiliary device for tightening the locking nut of the belt pulley of an AC motor.

[0004] The technical solution for solving the above technical problems is as follows:

[0005] An auxiliary device for tightening the locking nut of the belt pulley of an AC motor includes a base and a pedestal. The pedestal is fixed on the base, and further includes,

[0006] a bottom plate. The left and right sides of the bottom plate are respectively provided with a first support and positioning mechanism and a second support and positioning mechanism for supporting and positioning the alternator;

[0007] a locking mechanism for axially locking the rotor shaft of the alternator. The locking mechanism includes an upper connecting plate, a lower connecting plate, a lead screw component, a guide shaft, a fixed bushing, and a sleeve. One end of the guide shaft is fixedly connected to the upper connecting plate, and the other end of the guide shaft is fixedly connected to the base. One end of the lead screw component is fixedly connected to the upper connecting plate, and the other end of the lead screw component is movably connected to the lower connecting plate. The lower connecting plate is also movably matched with the guide shaft. One end of the fixed bushing is fixedly connected to the lower connecting plate, and the other end of the fixed bushing is in transitional fit with the rotor shaft of the alternator. The sleeve is sleeved on the fixed bushing, and the sleeve is in clearance fit with the fixed bushing. The sleeve is also in transitional fit with the locking nut of the belt pulley of the alternator.

[0008] Furthermore, the first support and positioning mechanism includes a first lower connecting block, a first intermediate connecting block, and a first positioning block. The first lower connecting block is connected to the pedestal, one end of the first intermediate connecting block is connected to the first lower connecting block, and the other end of the first intermediate connecting block is connected to the first positioning block. The first positioning block is provided with positioning ribs, and the positioning ribs are matched with one end of the alternator.

[0009] Further, the second support and positioning mechanism includes a second lower connecting block, a second intermediate connecting block, and a second positioning block. The second lower connecting block is connected to the base. One end of the second intermediate connecting block is connected to the second lower connecting block, and the other end of the second intermediate connecting block is connected to the second positioning block. The second positioning block is provided with a U-shaped groove, and the U-shaped groove cooperates with the other end of the alternator.

[0010] Further, the lead screw component includes a driver, a lead screw bearing, a lead screw, and a lead screw nut. The lead screw bearing is installed on the upper connecting plate. The lead screw nut is connected to the lower connecting plate. The driver is fixedly connected to the lead screw. The lead screw cooperates with the lead screw bearing and also cooperates with the lead screw nut.

[0011] Further, it further includes a guide rail. The guide rail is fixed on the base. The bottom plate is provided with a chute, and the guide rail is in sliding cooperation with the chute.

[0012] Further, a handle is further provided on the bottom plate, and the handle is bolted to the bottom plate.

[0013] The beneficial effects of the present invention are as follows: The present invention supports and positions the alternator through the first support and positioning mechanism and the second support and positioning mechanism, and locks and presses the rotor shaft of the alternator downward through the locking mechanism. When locking and pressing the rotor shaft of the alternator, the fixed shaft sleeve passes through the sleeve to achieve locking and pressing. The sleeve cooperates with a torque wrench to calibrate the tightening torque of the locking nut of the alternator pulley. And during the tightening process, the rotor shaft of the alternator and the fan blades installed on the rotor shaft will not rotate. When using the present invention to tighten the locking nut of the alternator pulley, it avoids the problem of disassembling the alternator due to the rotation of the rotor shaft and the fan blades. At the same time, there is no need to use a special tooling to clamp the fan blades, ensuring that the fan blades are not damaged and improving the assembly efficiency and assembly quality of the alternator. Description of the Drawings

[0014] Figure 1 Is a three-dimensional view of the tightening auxiliary device for the locking nut of the alternator pulley of the present invention and the alternator;

[0015] Figure 2 Is a three-dimensional view of the tightening auxiliary device for the locking nut of the alternator pulley of the present invention;

[0016] Figure 3 Is a structural diagram of the first support and positioning mechanism and the second support and positioning mechanism of the tightening auxiliary device for the locking nut of the alternator pulley of the present invention;

[0017] Figure 4 Is an enlarged view of the first support and positioning mechanism of the tightening auxiliary device for the locking nut of the alternator pulley of the present invention;

[0018] Figure 5 This is an enlarged view of the second support positioning mechanism of the tightening auxiliary device for the belt pulley locking nut of the AC motor of the present invention;

[0019] Figure 6 It is a schematic diagram of the fit between the fixed bushing and the rotor shaft of the AC motor, and the sleeve and the belt pulley locking nut.

[0020] Markings in the attached drawings: base 1, base plate 2, bottom plate 3, upper connecting plate 4, lower connecting plate 5, guiding shaft 6, fixed bushing 7, sleeve 8, first lower connecting block 10, threaded hole 10a, first intermediate connecting block 11, first positioning block 12, U-shaped adjustment hole 12a, positioning rib 13, second lower connecting block 20, second intermediate connecting block 21, second positioning block 22, U-shaped groove 23, driver 30, lead screw bearing 31, lead screw 32, lead screw nut 33, guide rail 40, chute 41, handle 50, limiting component 60, belt pulley 100, AC generator 101, hook 102, AC generator belt pulley 100, belt pulley locking nut 120, rotor shaft head 130, rotor shaft 140. Specific embodiments

[0021] The present invention will be further described below in conjunction with the attached drawings and specific embodiments.

[0022] As Figures 1 to 3 shown, a tightening auxiliary device for the belt pulley locking nut of an AC motor includes a base 1 and a base plate 2. The base plate 2 is fixed on the base 1, and further includes,

[0023] a bottom plate 3. The left and right sides of the bottom plate 3 are respectively provided with a first support positioning mechanism and a second support positioning mechanism for supporting and positioning the AC generator;

[0024] a locking mechanism for axially locking the rotor shaft of the AC generator. The locking mechanism includes an upper connecting plate 4, a lower connecting plate 5, a lead screw component, a guiding shaft 6, a fixed bushing 7, and a sleeve 8. One end of the guiding shaft 6 is fixedly connected to the upper connecting plate 4, and the other end of the guiding shaft 6 is fixedly connected to the base 1. One end of the lead screw component is fixedly connected to the upper connecting plate 4, and the other end of the lead screw component is movably connected to the lower connecting plate 5. The lower connecting plate 5 is also movably matched with the guiding shaft 6. One end of the fixed bushing 7 is fixedly connected to the lower connecting plate 5, and the other end of the fixed bushing 7 is in transitional fit with the rotor shaft of the AC generator. The sleeve 8 is sleeved on the fixed bushing 7, and the sleeve 8 is in clearance fit with the fixed bushing 7. The sleeve 8 is also in transitional fit with the belt pulley locking nut of the AC generator.

[0025] Preferably, the base plate 2 is fixed on the base 1 by an internal hexagonal bolt, the bottom plate 3 is fixed on the base plate 2 by an internal hexagonal bolt, the fixed bushing 7 is connected to the lower connecting plate 5 by an internal hexagonal bolt, and both the upper connecting plate 4 and the lower connecting plate 5 are made of metal materials.

[0026] The first support and positioning mechanism includes a first lower connecting block 10, a first intermediate connecting block 11, and a first positioning block 12. The first lower connecting block 10 is connected to the base 2. One end of the first intermediate connecting block 11 is connected to the first lower connecting block 10, and the other end of the first intermediate connecting block 11 is connected to the first positioning block 12. A positioning rib 13 is provided on the first positioning block 12, and the positioning rib 13 cooperates with one end of the alternator.

[0027] The second support and positioning mechanism includes a second lower connecting block 20, a second intermediate connecting block 21, and a second positioning block 22. The second lower connecting block 20 is connected to the base 2. One end of the second intermediate connecting block 21 is connected to the second lower connecting block 20, and the other end of the second intermediate connecting block 21 is connected to the second positioning block 22. A U-shaped groove 23 is provided on the second positioning block 22, and the U-shaped groove 23 cooperates with the other end of the alternator.

[0028] Preferably, the alternator 101 is positioned through the positioning rib 13 on the first positioning block 12 and the U-shaped groove 23 on the second positioning block 22. A plurality of threaded holes 10a are provided on the first lower connecting block 10. At the same time, a U-shaped adjustment hole 12a is also provided on the first positioning block 12 (adjustment holes are also provided on the first intermediate connecting block 11, which are not shown in the drawings). The threaded holes 10a on the first lower connecting block 10 can adjust the height of the first positioning block 12, and the U-shaped adjustment hole 12a on the first positioning block 12 can adjust the distance between the positioning rib 13 and the U-shaped groove 23. Similarly, as Figure 5 shown, a plurality of threaded mounting holes and adjustment holes are also correspondingly provided on the second lower connecting block 20, the second intermediate connecting block 21, and the second positioning block 22. Through the above structure, the first support and positioning mechanism and the second support and positioning mechanism can meet the support and positioning of alternators of different sizes.

[0029] Preferably, the first intermediate connecting block 11 is preferably connected to the first lower connecting block 10 and the first positioning block 12 by hexagon socket head cap screws. Similarly, the second intermediate connecting block 21 is preferably connected to the second lower connecting block 20 and the second positioning block 22 by hexagon socket head cap screws.

[0030] The screw rod component includes a driver 30, a screw rod bearing 31, a screw rod 32, and a screw rod nut 33. The screw rod bearing 31 is installed on the upper connecting plate 4. The screw rod nut 33 is connected to the lower connecting plate 5. The driver 30 is fixedly connected to the screw rod 32. The screw rod 32 cooperates with the screw rod bearing 31 and also cooperates with the screw rod nut 33.

[0031] A guide rail 40 is further included. The guide rail 40 is fixed on the base 2. A chute 41 is provided on the bottom plate 3. The guide rail 40 is in sliding cooperation with the chute 41.

[0032] A handle 50 is further provided on the bottom plate 3. The handle 50 is bolted to the bottom plate 3.

[0033] Preferably, the guide rail 40 is fixed to the base 2 by an internal hexagon bolt, and the handle 50 is fixed to the bottom plate 3 by an internal hexagon bolt.

[0034] In this embodiment, after the alternator 101 is positioned on the first support positioning mechanism and the second support positioning mechanism, the handle 50 can be held to push and pull the bottom plate 3, so that the bottom plate 3 slides back and forth along the guide rail 40, thereby playing a role in adjusting the positions of the first support positioning mechanism and the second support positioning mechanism. Moreover, a limiting member 60 is provided on the base 2, and the limiting member 60 is connected to the base 2 by a bolt. The limiting member 60 can prevent the bottom plate 3 from sliding out of the guide rail 40.

[0035] The working principle of the present invention is as follows: According to Figures 1 to 6 As shown, first, the alternator 101 is placed on the first positioning block 12 and the second positioning block 22 for positioning. Then, the front and rear positions of the bottom plate 3 are adjusted, and at the same time, the heights of the first support positioning mechanism and the second support positioning mechanism are adjusted, so that the rotor shaft head 130 of the rotor shaft 140 is aligned with the fixed shaft sleeve 7. Then, a sleeve 8 adapted to the pulley locking nut 120 is selected and placed into the installation hole of the alternator pulley 100 and sleeved on the pulley locking nut 120. Then, the driver 30 drives the lead screw 32 to rotate, and the lead screw 32 pushes the lower connecting plate 5 to move downward under the guiding action of the guiding shaft 6, thereby driving the fixed shaft sleeve 7 to move downward. When the fixed shaft sleeve 7 sleeves the rotor shaft head 130 of the rotor shaft 140 and completely locks the rotor shaft head 130 downward, the driver 30 stops working. Then, the sleeve 8 is tightened by an open-end torque wrench to calibrate the tightening force of the pulley locking nut 120. At this time, the rotor shaft 140 has been pressed and locked by the fixed shaft sleeve 7, so when the pulley locking nut 120 is tightened, the rotor shaft 140 will not rotate accordingly.

[0036] In this embodiment, the driver 30 adopts a handwheel, and this structure can reduce the manufacturing cost. At the same time, the driver 30 can also adopt a servo motor as the driving unit.

[0037] A hook 102 is also provided on the base 1. The hook 102 can be used to place spare or different-sized fixed shaft sleeves 7 and sleeves 8, and the hook 102 can also place an open-end torque wrench.

[0038] Finally, it should be noted that the above-described embodiments are only preferred embodiments of the present invention to illustrate the technical solutions of the present invention, rather than limiting it, let alone limiting the protection scope of the present invention; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the protection scope of the claims.

Claims

1. An auxiliary device for tightening a locking nut of a pulley of an AC motor, comprising a base (1) and a pedestal (2), the pedestal (2) being fixed on the base (1), characterized in that, It further includes a bottom plate (3), and a first support and positioning mechanism and a second support and positioning mechanism for supporting and positioning an alternator are respectively arranged on the left and right sides of the bottom plate (3); a locking mechanism for axially locking the rotor shaft of the alternator, the locking mechanism includes an upper connecting plate (4), a lower connecting plate (5), a lead screw component, a guide shaft (6), a fixed shaft sleeve (7), and a sleeve (8). One end of the guide shaft (6) is fixedly connected to the upper connecting plate (4), and the other end of the guide shaft (6) is fixedly connected to the base (1). One end of the lead screw component is fixedly connected to the upper connecting plate (4), and the other end of the lead screw component is movably connected to the lower connecting plate (5). The lower connecting plate (5) is also movably matched with the guide shaft (6). One end of the fixed shaft sleeve (7) is fixedly connected to the lower connecting plate (5), and the other end of the fixed shaft sleeve (7) is in transitional fit with the rotor shaft of the alternator. The sleeve (8) is sleeved on the fixed shaft sleeve (7), and the sleeve (8) is in clearance fit with the fixed shaft sleeve (7). The sleeve (8) is also in transitional fit with the pulley locking nut of the alternator.

2. The tightening auxiliary device for the belt pulley locking nut of an AC motor according to claim 1, characterized in that, The first support and positioning mechanism includes a first lower connecting block (10), a first intermediate connecting block (11), and a first positioning block (12). The first lower connecting block (10) is connected to the base (2). One end of the first intermediate connecting block (11) is connected to the first lower connecting block (10), and the other end of the first intermediate connecting block (11) is connected to the first positioning block (12). A positioning rib (13) is arranged on the first positioning block (12), and the positioning rib (13) is matched with one end of the alternator.

3. An auxiliary device for tightening the locking nut of an AC motor pulley according to claim 2, characterized in that, The second support and positioning mechanism includes a second lower connecting block (20), a second intermediate connecting block (21), and a second positioning block (22). The second lower connecting block (20) is connected to the base (2). One end of the second intermediate connecting block (21) is connected to the second lower connecting block (20), and the other end of the second intermediate connecting block (21) is connected to the second positioning block (22). A U-shaped groove (23) is arranged on the second positioning block (22), and the U-shaped groove (23) is matched with the other end of the alternator.

4. An auxiliary device for tightening the locking nut of the pulley of an AC motor according to claim 1, characterized in that, The lead screw component includes a driver (30), a lead screw bearing (31), a lead screw (32), and a lead screw nut (33). The lead screw bearing (31) is installed on the upper connecting plate (4). The lead screw nut (33) is connected to the lower connecting plate (5). The driver (30) is fixedly connected to the lead screw (32). The lead screw (32) is matched with the lead screw bearing (31), and the lead screw (32) is also matched with the lead screw nut (33).

5. An auxiliary device for tightening a locking nut of a pulley of an AC motor according to claim 1, characterized in that, It further includes a guide rail (40). The guide rail (40) is fixed on the base (2). A chute (41) is arranged on the bottom plate (3). The guide rail (40) is in sliding fit with the chute (41).

6. An auxiliary device for tightening the locking nut of the pulley of an AC motor according to claim 5, characterized in that, A handle (50) is further arranged on the bottom plate (3), and the handle (50) is bolted to the bottom plate (3).

Images