Worm gear self-locking jack for testing and assembling universal coupling

Abstract

The utility model discloses a worm gear self-locking jack for testing and assembling a universal coupling, and relates to the technical field of jacks. A shell is arranged on the upper portion of a base, a worm gear is arranged at the bottom of an inner cavity of the shell, a sliding sleeve is arranged on the upper portion of the inner cavity of the shell, and a lifting screw which is coaxial with the sliding sleeve and is driven by the worm gear to rotate is arranged in the sliding sleeve. A nut which is in threaded fit with the lifting screw and drives the sliding sleeve to conduct lifting adjustment is arranged on a rod body of the lifting screw, and a limiting piece which can be rotationally adjusted towards the lifting screw is hinged to the inner wall of the sliding sleeve. A pushing mechanism used for pushing the upper end of the limiting piece to abut against the lifting screw and limiting and fixing the lifting screw falling accidentally is further arranged on the inner wall of the sliding sleeve, a worm meshed with the worm gear is arranged on one side of the lower portion of the shell, and a wireless control button used for wirelessly controlling the pushing mechanism is arranged on a worm body. According to the utility model, the lifting screw rod is automatically limited and locked, so that the accidental falling of the lifting screw rod after the self-locking failure is effectively prevented.

Description

Technical Field

[0001] This utility model relates to the field of jack technology, and in particular to a worm gear self-locking jack for testing and assembling universal couplings. Background Technology

[0002] Universal couplings (such as heavy-duty couplings used in metallurgy and marine engineering) often require jacks as auxiliary tools to apply radial force or make fine adjustments during testing. Jacks are also needed during assembly to assist in adjusting the position of shafts or flanges. However, during the use of jacks, the lifting screw directly bears the load weight. Although jacks have a certain degree of self-locking protection, the following problems still exist in actual use:

[0003] 1. Existing jacks lack an active protection mechanism against self-locking failure. Once the worm gear transmission system fails, the lifting screw may fall instantly, threatening operational safety.

[0004] 2. The lifting screw relies on the self-locking property of the trapezoidal thread. When the lifting screw is used for support under vibration or off-center load conditions, it is easy to loosen, which may cause the lifting screw to fall unexpectedly, posing a safety hazard.

[0005] Therefore, there is an urgent need for a worm gear self-locking jack for universal coupling testing and assembly that can overcome the above-mentioned shortcomings. Utility Model Content

[0006] To overcome the shortcomings of the prior art, this utility model discloses a worm gear self-locking jack for testing and assembling universal couplings. This utility model effectively prevents the lifting screw from falling accidentally after the self-locking fails by automatically limiting and locking the lifting screw, thus providing a strong guarantee for the safe and stable support of the universal coupling.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A worm gear self-locking jack for testing and assembling universal couplings includes a base, a housing on the upper part of the base, a worm gear at the bottom of the housing cavity, a sliding sleeve on the upper part of the housing cavity, a lifting screw coaxially arranged with the sliding sleeve and driven to rotate by the worm gear inside the sliding sleeve, a nut threadedly engaged with the lifting screw and driving the sliding sleeve to adjust its height on the lifting screw body, a limiting plate hinged to the inner wall of the sliding sleeve that can rotate and adjust toward the lifting screw, and a pushing mechanism on the inner wall of the sliding sleeve for pushing the upper end of the limiting plate to abut against the lifting screw and limiting and fixing the lifting screw in case of accidental fall, and a worm gear meshing with the worm gear on one side of the lower part of the housing, a wireless control button for wirelessly controlling the pushing mechanism on the worm gear body.

[0009] Furthermore, the upper end of the limiting plate is provided with a toothed surface that matches the thread on the lifting screw.

[0010] Furthermore, the inner wall of the sliding sleeve is provided with a groove, the limiting piece is located in the groove and is hinged to the groove, and the bottom surface of the groove is provided with an installation port for installing the pushing mechanism.

[0011] Furthermore, a tension spring is provided between the bottom surface of the groove and the limiting piece. One end of the tension spring is connected to the lower side of the bottom surface of the groove, and the other end of the tension spring is connected to the upper side of the limiting piece.

[0012] Furthermore, the actuating mechanism includes a mounting base, one end face of which is provided with an electric telescopic rod for pushing the limiting plate to deflect toward the lifting screw. The electric telescopic rod is connected to a wireless control button. One side of the mounting base is provided with a battery slot, which contains a battery for supplying power to the electric telescopic rod.

[0013] Furthermore, the mounting port is a circular structure and is provided through the sliding sleeve. The mounting base is a columnar structure and is threaded to the inner wall of the mounting port. The other end of the mounting base is provided with a screw hole. The outer wall of the housing is provided with a through hole that corresponds to and fits the mounting port and penetrates the housing. A sealing plug can be detachably installed at the outer end of the through hole.

[0014] Furthermore, the port near the lifting screw of the mounting opening is provided with an inner folded edge, and the end face of the mounting seat with the electric telescopic rod is provided with an annular notch that matches the inner folded edge.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] By cooperating with the pushing mechanism and the limiting plate, the upper end of the limiting plate can resist and limit the lifting screw, effectively preventing the lifting screw from falling accidentally and ensuring safe use.

[0017] By setting a wireless control button, the electric telescopic rod in the push mechanism can be retracted, so that when the lifting screw is adjusted, the upper end of the limit plate can be separated from the lifting screw.

[0018] By setting a tension spring, after the electric telescopic rod of the pushing mechanism retracts, the limit plate can automatically deflect toward the sliding sleeve through the tension spring, providing strong support for the lifting adjustment of the lifting screw;

[0019] By setting up threaded mounting bases, ports, and screw-in ports, it is much easier for staff to disassemble, inspect, and maintain the push mechanism, and provides strong support for the limit protection of the lifting screw.

[0020] This invention effectively prevents the lifting screw from falling accidentally after the self-locking fails by automatically limiting and locking it, thus providing a strong guarantee for the safe and stable support of the universal coupling and effectively reducing the probability of safety accidents. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a partial schematic diagram of the sliding sleeve of this utility model;

[0023] Figure 3 This is a schematic diagram of the propulsion mechanism of this utility model.

[0024] In the diagram: 1. Pressure cap; 2. Housing; 3. Sliding sleeve; 4. Pushing mechanism; 5. Limiting plate; 6. Lifting screw; 7. Nut; 8. Worm gear; 9. Wireless control button; 10. Worm; 11. Base; 12. Groove; 13. Inner fold; 14. Mounting port; 15. Sealing plug; 16. Through port; 17. Tension spring; 18. Battery; 19. Battery slot; 20. Electric telescopic rod; 21. Mounting groove; 22. Mounting base; 23. Annular notch; 24. Tightening port. Detailed Implementation

[0025] The technical solution of this utility model will be described below with reference to the accompanying drawings of the embodiments of this utility model. In the description, it should be understood that if there are terms such as "upper", "lower", "front", "rear", "left", "right" indicating the orientation or positional relationship, they are only corresponding to the drawings of this utility model for the convenience of describing this utility model, and do not indicate or imply that the device or element referred to must have a specific orientation.

[0026] Please refer to the instruction manual appendix. Figure 1-3 This utility model provides a technical solution:

[0027] Example 1: A worm gear self-locking jack for testing and assembling universal couplings includes a base 11, a housing 2 on the upper part of the base 11, a worm gear 9 at the bottom of the inner cavity of the housing 2, a sliding sleeve 3 on the upper part of the inner cavity of the housing 2, a lifting screw 6 coaxially arranged with the sliding sleeve 3 and driven to rotate by the worm gear 9 inside the sliding sleeve 3, a nut 7 threadedly engaged with the lifting screw 6 and driving the sliding sleeve 3 to adjust its height, a worm 10 meshing with the worm gear 9 on one side of the lower part of the housing 2, and a pressure cap 1 on the top of the sliding sleeve 3. The lifting adjustment method of the worm 10 and the worm gear 9 driving the sliding sleeve 3 and the lifting screw 6 is the same as the lifting principle of existing mechanical jacks.

[0028] The inner wall of the sliding sleeve 3 is provided with a groove 12, and a limiting piece 5 is provided in the groove 12. The lower end of the limiting piece 5 is hinged to the groove 12. The bottom surface of the groove 12 is provided with an installation port 14. The installation port 14 is provided with a pushing mechanism 4 for pushing the upper end of the limiting piece 5 to abut against the lifting screw 6 and for limiting and fixing the lifting screw 6 in case of accidental fall. Specifically, the pushing mechanism 4 includes a mounting base 22. One end face of the mounting base 22 is provided with an electric telescopic rod 20. The electric telescopic rod 20 is in the extended state by default. The movable rod inside the electric telescopic rod 20 extends and pushes the limiting piece 5 to deflect toward the lifting screw 6. The upper end of the limiting piece 5 abuts against the thread of the lifting screw 6 through the push of the electric telescopic rod 20. When the self-locking is lost... In the event of an accidental fall of the lifting screw 6, the limiting plate 5 can lock and limit the lifting screw 6. To improve the locking effect of the limiting plate 5 on the lifting screw 6, the upper end of the limiting plate 5 is provided with a toothed surface that matches the thread on the lifting screw 6. The mounting base 22 is provided with a battery slot 19 on one side, and a battery 18 for supplying power to the electric telescopic rod 20 is provided in the battery slot 19. The worm gear 10 is provided with a wireless control button 9 for wirelessly controlling the pushing mechanism 4. When the lifting screw 6 is adjusted normally, the worm gear 10 is rotated while the wireless control button 9 is pressed, the electric telescopic rod 20 retracts, the upper end of the limiting plate 5 separates from the lifting screw 6, and the lifting screw 6 can be adjusted smoothly.

[0029] In the second embodiment, during the normal lifting and lowering adjustment of the lifting screw 6, in order to ensure that the limiting plate 5 can be smoothly and efficiently separated from the lifting screw 6, a tension spring 17 is provided between the bottom surface of the groove 12 and the limiting plate 5. One end of the tension spring 17 is connected to the lower side of the bottom surface of the groove 12, and the other end of the tension spring 17 is connected to the upper side of the limiting plate 5. Using the tension of the tension spring 17, when the electric telescopic rod 20 is retracted, the limiting plate 5 can be deflected toward the sliding sleeve 3 by the pull of the tension spring 17, thereby separating the limiting plate 5 from the lifting screw 6.

[0030] In Example 3, to facilitate the disassembly, inspection and maintenance of the pushing mechanism 4, the mounting port 14 is a circular structure and is set through the sliding sleeve 3. The mounting base 22 is a columnar structure and is threaded to the inner wall of the mounting port 14. The other end of the mounting base 22 is provided with a screwing port 24. The outer wall of the housing 2 is provided with a through port 16 that corresponds to and fits the mounting port 14 and passes through the housing 2. A sealing plug 15 is detachably installed at the outer end of the through port 16. When disassembly and maintenance are required, the sealing plug 15 is opened, and a screwdriver is inserted through the through port 16 into the screwing port 24 to drive the mounting base 22 to detach from the mounting port 14.

[0031] To ensure that the mounting base 22 can be installed accurately and efficiently in the mounting port 14 during the installation process, and to avoid overloading that could affect the subsequent separation of the limiting piece 5 and the lifting screw 6, the mounting port 14 near the lifting screw 6 is provided with an inner folded edge 13, and the end face of the mounting base 22 with the electric telescopic rod 20 is provided with an annular notch 23 that matches the inner folded edge 13.

[0032] The parts of this utility model not described in detail are prior art. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that this utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the above embodiments should be regarded as exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended to include all changes that fall within the meaning and scope of the equivalents of the claims in this utility model, and no reference numerals in the claims should be regarded as limiting the content of the claims.

Claims

1. A worm gear self-locking jack for testing and assembling universal couplings, comprising a base (11), characterized in that: The base (11) has a housing (2) on the upper part. The bottom of the inner cavity of the housing (2) is provided with a worm gear (8). The upper part of the inner cavity of the housing (2) is provided with a sliding sleeve (3). The sliding sleeve (3) is provided with a lifting screw (6) that is coaxial with the sliding sleeve (3) and driven to rotate by the worm gear (8). The lifting screw (6) is provided with a nut (7) that is threaded with the lifting screw (6) and drives the sliding sleeve (3) to adjust the lifting. The inner wall of the sliding sleeve (3) is hinged with a limiting piece (5) that can rotate towards the lifting screw (6). The inner wall of the sliding sleeve (3) is also provided with a pushing mechanism (4) for pushing the upper end of the limiting piece (5) to abut against the lifting screw (6) and for limiting and fixing the lifting screw (6) in case of accidental fall. The lower side of the housing (2) is provided with a worm (10) that meshes with the worm gear (8). The worm (10) is provided with a wireless control button (9) for wirelessly controlling the pushing mechanism (4).

2. The worm gear self-locking jack for testing and assembling a universal coupling according to claim 1, characterized in that: The upper end of the limiting plate (5) is provided with a toothed surface that matches the thread on the lifting screw (6).

3. The worm gear self-locking jack for testing and assembling a universal coupling according to claim 2, characterized in that: The inner wall of the sliding sleeve (3) is provided with a groove (12), the limiting piece (5) is located in the groove (12) and is hinged to the groove (12), and the bottom surface of the groove (12) is provided with an installation port (14) for installing the pushing mechanism (4).

4. The worm gear self-locking jack for testing and assembling a universal coupling according to claim 3, characterized in that: A tension spring (17) is provided between the bottom surface of the groove (12) and the limiting piece (5). One end of the tension spring (17) is connected to the lower side of the bottom surface of the groove (12), and the other end of the tension spring (17) is connected to the upper side of the limiting piece (5).

5. A worm gear self-locking jack for testing and assembling a universal coupling according to claim 3, characterized in that: The pushing mechanism (4) includes a mounting base (22). One end face of the mounting base (22) is provided with an electric telescopic rod (20) for pushing the limiting plate (5) to deflect toward the lifting screw (6). The electric telescopic rod (20) is connected to the wireless control button (9). One side of the mounting base (22) is provided with a battery slot (19). The battery slot (19) is provided with a battery (18) for supplying power to the electric telescopic rod (20).

6. A worm gear self-locking jack for testing and assembling a universal coupling according to claim 5, characterized in that: The mounting port (14) is circular and passes through the sliding sleeve (3). The mounting base (22) is cylindrical and is threaded to the inner wall of the mounting port (14). The other end of the mounting base (22) is provided with a screw hole (24). The outer wall of the housing (2) is provided with a through hole (16) that corresponds to and fits the mounting port (14) and passes through the housing (2). A sealing plug (15) can be detachably installed on the outer end of the through hole (16).

7. A worm gear self-locking jack for testing and assembling a universal coupling according to claim 6, characterized in that: The mounting port (14) near the lifting screw (6) has an inner folded edge (13), and the mounting base (22) with electric telescopic rod (20) has an annular notch (23) on its end face that matches the inner folded edge (13).

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