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

Abstract

The utility model 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 on 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] This utility model relates to the field of AC generator assembly accessories technology, specifically to an auxiliary device for tightening the locking nut of an AC motor pulley. Background Technology

[0002] In existing technology, the fan blades of an alternator are usually mounted on the rotor shaft, and the pulley of the alternator is also mounted on the rotor shaft. During assembly, the fan blades need to be installed first, followed by the pulley. However, when tightening the pulley lock nut, the rotor shaft and fan blades will rotate together, making it impossible to tighten the pulley lock nut. The current solution is to use special tooling to hold the fan blades in place, so that the rotor shaft and fan blades do not rotate, thus adjusting the tightening force of the pulley lock nut. However, this solution requires disassembling the alternator to hold the fan blades in place with special tooling, and the tooling can easily damage the fan blades. Therefore, using this solution to tighten the alternator's nuts is not only time-consuming, but also poses a significant quality risk to the alternator. Summary of the Invention

[0003] In view of the shortcomings of the prior art, this utility model provides an auxiliary device for tightening the locking nut of an AC motor pulley.

[0004] The technical solutions to the above technical problems are as follows:

[0005] An auxiliary device for tightening a locking nut on an AC motor pulley includes a base and a base plate, with the base plate fixed on the base plate. It also includes...

[0006] The base plate has a first support positioning mechanism and a second support positioning mechanism on its left and right sides, respectively, for supporting and positioning the AC generator.

[0007] A locking mechanism for axially locking the rotor shaft of an alternator includes an upper connecting plate, a lower connecting plate, a lead screw assembly, 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 is fixedly connected to the base. One end of the lead screw assembly is fixedly connected to the upper connecting plate, and the other end is movably connected to the lower connecting plate. The lower connecting plate also movably engages 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 has a transition fit with the alternator rotor shaft. The sleeve is fitted onto the fixed bushing with a clearance fit, and the sleeve also has a transition fit with the alternator pulley locking nut.

[0008] Furthermore, the first support 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 base, 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 a positioning rib, which cooperates with one end of the alternator.

[0009] Furthermore, 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, which cooperates with the other end of the alternator.

[0010] Furthermore, the lead screw assembly includes a driver, a lead screw bearing, a lead screw, and a lead screw nut. The lead screw bearing is mounted 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 the lead screw also cooperates with the lead screw nut.

[0011] Furthermore, it also includes a guide rail, which is fixed on the base. The base plate has a sliding groove, and the guide rail slides in conjunction with the sliding groove.

[0012] Furthermore, the base plate is also provided with a handle, which is bolted to the base plate.

[0013] The beneficial effects of this utility model are as follows: This utility model supports and positions the alternator through a first support positioning mechanism and a second support positioning mechanism, and locks and presses the rotor shaft of the alternator downward through a locking mechanism. When locking and pressing the rotor shaft of the alternator, the fixing sleeve passes through the sleeve to achieve locking and pressing. The sleeve, together with a torque wrench, can adjust the tightening torque of the alternator pulley locking nut. Furthermore, during the tightening process, the rotor shaft of the alternator and the fan blades mounted on the rotor shaft will not rotate. When using this utility model to tighten the alternator pulley locking nut, the problem of needing to disassemble the alternator due to the rotor shaft and fan blades rotating is avoided. At the same time, it is not necessary to use special tooling to hold the fan blades, ensuring that the fan blades are not damaged, while also improving the assembly efficiency and assembly quality of the alternator. Attached Figure Description

[0014] Figure 1 This is a perspective view of the AC motor pulley locking nut tightening auxiliary device and the AC motor of this utility model;

[0015] Figure 2 This is a perspective view of the AC motor pulley locking nut tightening auxiliary device of this utility model;

[0016] Figure 3 This is a structural diagram of the first and second support positioning mechanisms of the AC motor pulley locking nut tightening auxiliary device of this utility model;

[0017] Figure 4 This is an enlarged view of the first support and positioning mechanism of the AC motor pulley locking nut tightening auxiliary device of this utility model;

[0018] Figure 5 This is an enlarged view of the second support and positioning mechanism of the AC motor pulley locking nut tightening auxiliary device of this utility model;

[0019] Figure 6 This diagram shows the fit between the fixed bushing and the AC motor rotor shaft, as well as the fit between the sleeve and the pulley lock nut.

[0020] The markings in the attached diagram are as follows: base 1, base 2, bottom plate 3, upper connecting plate 4, lower connecting plate 5, guide 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 adjusting 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, slide 41, handle 50, limiting component 60, pulley 100, alternator 101, hook 102, alternator pulley 100, pulley locking nut 120, rotor shaft head 130, rotor shaft 140. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0022] like Figures 1 to 3 As shown, an auxiliary device for tightening a locking nut on an AC motor pulley includes a base 1 and a base 2, with the base 2 fixed on the base 1. It also includes...

[0023] The base plate 3 has a first support positioning mechanism and a second support positioning mechanism on its left and right sides, respectively, for supporting and positioning the AC generator.

[0024] A locking mechanism for axially locking the rotor shaft of an alternator includes an upper connecting plate 4, a lower connecting plate 5, a lead screw assembly, a guide shaft 6, a fixed bushing 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 is fixedly connected to the base 1. One end of the lead screw assembly is fixedly connected to the upper connecting plate 4, and the other end is movably connected to the lower connecting plate 5. The lower connecting plate 5 is also movably fitted with the guide shaft 6. One end of the fixed bushing 7 is fixedly connected to the lower connecting plate 5, and the other end is transitionally fitted with the rotor shaft of the alternator. The sleeve 8 is fitted on the fixed bushing 7 with a clearance fit, and the sleeve 8 is also transitionally fitted with the lock nut of the alternator's pulley.

[0025] Preferably, the base 2 is fixed to the base 1 by hexagon socket head cap screws, the base plate 3 is fixed to the base 2 by hexagon socket head cap screws, the fixing bushing 7 is connected to the lower connecting plate 5 by hexagon socket head cap screws, and the upper connecting plate 4 and the lower connecting plate 5 are both made of metal.

[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. The first positioning block 12 is provided with a positioning rib 13, which 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. The second positioning block 22 is provided with a U-shaped groove 23, which cooperates with the other end of the alternator.

[0028] Preferably, the alternator 101 is positioned by the positioning rib 13 on the first positioning block 12 and the U-shaped groove 23 on the second positioning block 22. Multiple threaded holes 10a are provided on the first lower connecting block 10. Simultaneously, the first positioning block 12 is also provided with a U-shaped adjustment hole 12a (an adjustment hole is also provided on the first intermediate connecting block 11, not shown in the attached figures). 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 As shown, the second lower connecting block 20, the second intermediate connecting block 21, and the second positioning block 22 are also provided with multiple threaded mounting holes and adjustment holes. Through the above structure, the first support positioning mechanism and the second support positioning mechanism can meet the support positioning of AC generators of different sizes.

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

[0030] The lead screw assembly 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 mounted 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 cooperates with the lead screw bearing 31, and the lead screw 32 also cooperates with the lead screw nut 33.

[0031] It also includes a guide rail 40, which is fixed on the base 2. The base plate 3 is provided with a sliding groove 41, and the guide rail 40 slides in conjunction with the sliding groove 41.

[0032] The base plate 3 is also provided with a handle 50, which is bolted to the base plate 3.

[0033] Preferably, the guide rail 40 is fixed to the base 2 by hex bolts, and the handle 50 is fixed to the base plate 3 by hex bolts.

[0034] In this embodiment, after the alternator 101 is positioned with the first support positioning mechanism and the second support positioning mechanism, the base plate 3 can be pushed and pulled by hand using the handle 50, so that the base plate 3 can slide back and forth along the guide rail 40, thereby adjusting the position of the first support positioning mechanism and the second support positioning mechanism. In addition, a limiting component 60 is provided on the base 2. The limiting component 60 is connected to the base 2 by bolts, and the limiting component 60 can prevent the base plate 3 from sliding out of the guide rail 40.

[0035] The working principle of this utility model is as follows: According to Figures 1 to 6 As shown, the alternator 101 is first positioned on the first positioning block 12 and the second positioning block 22. Then, the front and rear positions of the base plate 3 are adjusted, and the heights of the first and second support positioning mechanisms are adjusted simultaneously, so that the rotor shaft head 130 of the rotor shaft 140 is aligned with the fixed shaft sleeve 7. Then, a sleeve 8 that matches the pulley locking nut 120 is selected and inserted into the mounting hole of the alternator pulley 100, and fitted onto the pulley locking nut 120. Then, the driver 30 drives the lead screw 32 to rotate. 32 pushes the connecting plate 5 to move downward under the guidance of the guide shaft 6, thereby driving the fixed bushing 7 to move downward. When the fixed bushing 7 covers 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 the open torque wrench to adjust the tightening force of the pulley locking nut 120. At this time, the rotor shaft 140 has been pressed and locked by the fixed bushing 7, so the rotor shaft 140 will not rotate when the pulley locking nut 120 is tightened.

[0036] In this embodiment, the driver 30 uses a handwheel, which can reduce manufacturing costs. Alternatively, the driver 30 can also use a servo motor as the drive unit.

[0037] A hook 102 is also provided on the base 1. The hook 102 can be used to place spare or different sizes of fixed bushings 7 and sleeves 8. The hook 102 can also hold open-end torque wrenches.

[0038] Finally, it should be noted that the above-described embodiments are merely preferred embodiments of the present invention used to illustrate the technical solutions of the present invention, and are not intended to limit them, much less limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to depart from the scope of protection of the claims.

Claims

1. An auxiliary device for tightening a locking nut on an AC motor pulley, comprising a base (1) and a base (2), wherein the base (2) is fixed on the base (1), characterized in that, It also includes, The base plate (3) has a first support positioning mechanism and a second support positioning mechanism on its left and right sides, respectively, for supporting and positioning the AC generator. A locking mechanism for axially locking the rotor shaft of an AC generator includes an upper connecting plate (4), a lower connecting plate (5), a lead screw assembly, a guide shaft (6), a fixed bushing (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 assembly is fixedly connected to the upper connecting plate (4), and the other end of the lead screw assembly is movably connected to the lower connecting plate (5). The lower connecting plate (5) is also movably fitted with the guide 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 transitionally fitted with the rotor shaft of the AC generator. The sleeve (8) is fitted on the fixed bushing (7), and the sleeve (8) is clearance fitted with the fixed bushing (7). The sleeve (8) is also transitionally fitted with the lock nut of the pulley of the AC generator.

2. The auxiliary device for tightening the locking nut of an AC motor pulley according to claim 1, characterized in that, The first support 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). The first positioning block (12) is provided with a positioning rib (13), which cooperates with one end of the alternator.

3. The 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). The second positioning block (22) is provided with a U-shaped groove (23), which is engaged with the other end of the alternator.

4. The auxiliary device for tightening the locking nut of an AC motor pulley according to claim 1, characterized in that, The lead screw assembly 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 mounted 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) cooperates with the lead screw bearing (31), and the lead screw (32) also cooperates with the lead screw nut (33).

5. The auxiliary device for tightening the locking nut of an AC motor pulley according to claim 1, characterized in that, It also includes a guide rail (40), which is fixed on the base (2). The base plate (3) is provided with a sliding groove (41), and the guide rail (40) and the sliding groove (41) slide together.

6. The auxiliary device for tightening the locking nut of an AC motor pulley according to claim 5, characterized in that, The base plate (3) is also provided with a handle (50), which is bolted to the base plate (3).

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