Auxiliary tool for assembling and disassembling shaft sleeve of output shaft of speed reducer of vertical rolling mill

Abstract

The utility model provides an auxiliary tool for assembling and disassembling a shaft sleeve of an output shaft of a speed reducer of a vertical rolling mill, which comprises a support frame, a telescopic suspension arm, a heater, a distance measuring rod and a driver, the telescopic suspension arm, the heater, the distance measuring rod and the driver are arranged on the support frame, the telescopic suspension arm can drive the support frame to axially move along the support frame, and the heater is used for heating the shaft sleeve. The distance measuring rod is connected with the supporting frame in a sliding mode and driven by the driver to move in the radial direction of the supporting frame so as to measure the inner diameter of the shaft sleeve. The vertical rolling mill speed reducer output shaft sleeve hot charging device can support, heat, measure the diameter and lift the shaft sleeve, overcomes the defect that a crane in a workshop cannot be directly used for hoisting operation in a narrow space and under a speed reducer due to the fact that an equipment part is large and heavy, can accurately control the installation size, can improve the on-line hot charging efficiency of the vertical rolling mill speed reducer output shaft sleeve, and improves the production efficiency of the vertical rolling mill speed reducer output shaft sleeve. The installation speed is increased, the safety in the installation process is improved, time consumed for replacing damaged equipment is shortened, and the downtime of a production line is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of shaft sleeve installation and removal tools, in particular to an auxiliary tool for installing and removing a shaft sleeve of an output shaft of a vertical rolling mill reducer. Background Art

[0002] In metallurgical bar and wire production lines, the reducer of a vertical rolling mill features dual output shafts, arranged vertically. The output shafts and universal joints are splined. Typically, the reducer is mounted on an overhead equipment foundation, with space directly below the reducer output shafts for the mill core.

[0003] When installing and removing the sleeve of the output shaft of the vertical rolling mill reducer, due to limited space, the crane cannot lift the sleeve to the installation position, and the online hot installation of the sleeve is difficult, especially the hot installation in the vertical direction, which greatly reduces the installation and removal efficiency of the sleeve. Utility Model Content

[0004] The purpose of the utility model is to provide an auxiliary tool for installing and removing the output shaft sleeve of a vertical rolling mill reducer, so as to solve the problems in the above background.

[0005] The technical solution of the present utility model includes: an auxiliary tool for installing and removing the output shaft sleeve of a vertical rolling mill reducer, which includes a support frame and a telescopic suspension arm, a heater, a distance measuring rod and a driver arranged thereon, the telescopic suspension arm can drive the support frame to move along its own axial direction, the heater is used to heat the sleeve, the distance measuring rod is slidably connected to the support frame, and is driven by the driver to move along the radial direction of the support frame to measure the inner diameter of the sleeve.

[0006] Preferably, the support frame includes a sleeve 1 and a sleeve 2 that are slidably connected, the ranging rod is arranged on the sleeve 2, the external thread of the sleeve 2 is connected with a transmission worm gear, the sleeve 1 is provided with a transmission worm, one end of the transmission worm is connected to the drive motor, and the transmission worm gear is meshed with the transmission worm.

[0007] Preferably, the driver includes a lifting rod, a distance adjusting rod and a differential head which are coaxially arranged in sequence, the distance measuring rod passes through the side wall of the sleeve 2 and abuts the lifting rod located on the inner side thereof; the distance adjusting rod passes through the bottom plate of the sleeve 2, and its two ends are respectively connected to the lifting rod and the differential head.

[0008] Preferably, a conical portion is provided at the top end of the lifting rod, a plurality of the ranging rods are distributed circumferentially around the conical portion, and the ranging rods are provided with an inclined surface adapted to the shape of the conical portion.

[0009] Preferably, the auxiliary tool also includes a limit rod, the two ends of which are respectively connected to the side wall of the sleeve 2 and the limit block, a return spring and a slide plate are provided between the limit block and the sleeve 2, both of which are slidably mounted on the limit rod, and the ranging rod is fixedly connected to the limit block.

[0010] Preferably, the sleeve 2 includes at least a barrel section 1 and a barrel section 2, the barrel section 1 is located at the top of the barrel section 2, and its radial dimension is smaller than that of the barrel section 2, and the ranging rod is arranged on the barrel section 2.

[0011] Preferably, the heater is an electromagnetic induction heating coil, which is sleeved on the outside of the barrel section 1.

[0012] Preferably, an annular boss and a lifting lug are provided on the top of the sleeve 1, the inner diameter of the annular boss is larger than the inner diameter of the sleeve 1, and the lifting lug is located outside the annular boss for installing the telescopic suspension arm.

[0013] Preferably, the telescopic suspension arm includes at least arm 1, arm 2 and a cylinder, the proximal ends of arm 1 and arm 2 are rotatably connected, and the separated ends are respectively provided with rotating connecting parts, and the two ends of the cylinder are respectively rotatably connected to the middle parts of arm 1 and arm 2.

[0014] The beneficial effects of the present invention are that the auxiliary tool can support, heat, measure the diameter and lift the shaft sleeve, which solves the problem that in a narrow space or directly below the reducer, the equipment parts are large and heavy and cannot be directly lifted by the crane in the workshop. The utility model can also accurately control the installation dimensions, improve the online hot installation efficiency of the output shaft sleeve of the vertical rolling mill reducer, speed up the installation speed, improve the safety during the installation process, reduce the time spent on replacing damaged equipment, and shorten the downtime of the production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a diagram of the use state of an embodiment of the utility model;

[0016] Figure 2 It is a front cross-sectional view of an embodiment of the utility model;

[0017] Figure 3 This is a schematic diagram of the connection between the driver and the ranging rod in the embodiment of the utility model;

[0018] Figure 4 This utility model embodiment is attached Figure 3 A magnified view of the structure at center A;

[0019] Figure 5 This is a schematic diagram of the connection between the support frame and the transmission worm in an embodiment of the present utility model;

[0020] Figure 6It is a structural diagram of the telescopic suspension arm in an embodiment of the present utility model.

[0021] In the picture:

[0022] 1. Support frame; 1-1. Sleeve 1; 1-2. Sleeve 2; 1-21. Sleeve section 1; 1-22. Sleeve section 2;

[0023] 2. Telescopic suspension arm; 2-1. Support arm 1; 2-2. Support arm 2; 2-3. Cylinder; 2-4. Rotating connector;

[0024] 3. Heater;

[0025] 4. Distance measuring rod; 4-1. Inclined surface; 4-2. Expanded diameter portion;

[0026] 5. Driver; 5-1. Lifting rod; 5-2. Pitch adjustment rod; 5-3. Differentiator head; 5-4. Conical part;

[0027] 6. Transmission worm gear;

[0028] 7. Transmission worm;

[0029] 8. Drive motor;

[0030] 9. Mounting frame;

[0031] 10. Slider;

[0032] 11. Chute;

[0033] 12. Output shaft;

[0034] 13. Limit rod;

[0035] 14. Return spring;

[0036] 15. Skateboard;

[0037] 16. Limit block;

[0038] 17. Annular boss;

[0039] 18. Lifting lugs;

[0040] 19. Bushing. DETAILED DESCRIPTION

[0041] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0042] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0043] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0044] Reference Attachment Figure 1-6This embodiment provides an auxiliary tool for installing and removing the output shaft sleeve of a vertical rolling mill reducer. The tool includes a support frame 1, a telescopic suspension arm 2, a heater 3, a distance measuring rod 4 and a driver 5. The telescopic suspension arm 2 can drive the support frame 1 to move along its own axial direction. The heater 3 is used to heat the sleeve 19. The distance measuring rod 4 is slidably connected to the support frame 1 and is driven by the driver 5 to move along the radial direction of the support frame 1 to measure the inner diameter of the sleeve 19. The tool can be used to remove the old shaft sleeve 19 or install a new shaft sleeve 19. When removing the old shaft sleeve 19, connect the end of the telescopic suspension arm 2 away from the support frame 1 to the equipment foundation, so that the support frame 1 is located directly below the output shaft 12 of the vertical rolling mill reducer. Use the telescopic suspension arm 2 to lift the support frame 1 so that the support frame 1 is close to the old shaft sleeve 19. Use the heater 3 to heat the old shaft sleeve 19 so that the volume of the old shaft sleeve 19 expands and the inner diameter increases, and then it separates from the output shaft 12 and falls onto the support frame 1. Use the telescopic suspension arm 2 to lower the support frame 1, and then remove the old shaft sleeve 19 from the support frame 1. When installing the new shaft sleeve 19, The retractable suspension arm 2 is installed on the equipment foundation according to the above principles, and the new sleeve 19 is placed on the support frame 1. The ranging rod 4 is located on the inner side of the new sleeve 19. When the heater 3 heats the new sleeve 19, the driver 5 is used to drive the ranging rod 4 to move toward the inner wall of the new sleeve 19. The inner diameter of the new sleeve 19 is measured while heating. When its inner diameter meets the assembly size, the telescopic suspension arm 2 is used to lift the support frame 1, so that the new sleeve 19 gradually approaches and is sleeved on the output shaft 12. After the new sleeve 19 cools down and the assembly is stable, the telescopic suspension arm 2 is used to lower the support frame 1 and the tool can be removed from the equipment foundation.

[0045] Reference Attachment Figure 3 The support frame 1 includes a coaxially configured and sliding sleeve 1-1 and a sleeve 2 1-2. The driver 5 includes a lifting rod 5-1, a pitch adjustment rod 5-2 and a differential head 5-3 that are coaxially configured in sequence. The sleeve 2 1-2 is located on the inner side of the sleeve 1-1. The external thread of the sleeve 2 1-2 is sleeved with a transmission worm gear 6. A transmission worm 7 is provided in the sleeve 1-1. One end of the transmission worm 7 is connected to the drive motor 8. The transmission worm gear 6 is meshed with the transmission worm 7. The driver 5 is located on the inner side of the sleeve 1-2; the ranging rod 4 passes through the side wall of the sleeve 1-2 and abuts the lifting rod 5-1 located on the inner side thereof; the top of the lifting rod 5-1 is provided with a tapered portion 5-4, and a plurality of ranging rods 4 are distributed circumferentially around the tapered portion 5-4, and the ranging rod 4 is provided with an inclined surface 4-1 adapted to the shape of the tapered portion 5-4; the distance-adjusting rod 5-2 passes through the bottom plate of the sleeve 1-2, and the top and bottom ends are respectively connected to the lifting rod 5-1 and the differential head 5-3.

[0046] To facilitate the installation of the transmission worm 7, an opening can be made on the side wall of the sleeve 1-1, and a mounting frame 9 for the transmission worm 7 is set at the opening. The transmission worm 7 is rotatably set on the mounting frame 9 and engages with the transmission worm wheel 6 at the opening of the sleeve 1-1.

[0047] The sleeve 1-1 and sleeve 2-1-2 can be connected by means of a slide 11 and a slider 10, that is, a slider 10 is provided on the side wall of one of the sleeves, and a slide 11 extending axially along the support frame 1 is provided on the side wall of the other sleeve. The slide 11 and the slider 10 are used to limit the sleeve 2-1-2 so that it cannot rotate and can only slide up and down driven by the inner wall thread of the transmission worm gear 6. The pitch-adjusting rod 5-2 can abut against the lifting rod 5-1 or be threadedly connected to the lifting rod 5-1. When threadedly connected to the lifting rod 5-1, a thread groove (not shown) is provided at the bottom of the lifting rod 5-1, and the pitch-adjusting rod 5-2 is extended into the thread groove. The slide 11 and the slider 10 structure (not shown) as described above is provided between the lifting rod 5-1 and the sleeve 2-1-2, so that the lifting rod 5-1 cannot rotate. Then, the lifting rod 5-1 can be raised and lowered by the thread of the pitch-adjusting rod 5-2.

[0048] Initially, only a small part of the distance measuring rod 4 extends out of the sleeve 1-2. When the inner diameter of the sleeve 19 needs to be measured, the driving motor 8 is used to drive the transmission worm 7 to rotate, and then the transmission worm wheel 6 is driven to rotate, so that the height of the sleeve 1-2 is raised so that the distance measuring rod 4 can abut the middle part of the sleeve 19 (because there is a clamping structure at the inner end of the sleeve 19, the inner diameter here should not be measured); the sleeve 19 is placed on the sleeve 1-1 so that the distance measuring rod 4 is located at the middle part of the sleeve. On the inner side of 19, when the heater 3 heats up the sleeve 19, the rotating differential head 5-3 is used to drive the distance adjusting rod 5-2 and the lifting rod 5-1 to move upward. As the tapered portion 5-4 moves upward, the diameter of the position where it abuts against the ranging rod 4 gradually increases, and the ranging rod 4 is pressed toward the sleeve 19 and presses against the inner wall of the sleeve 19. The ranging rod 4 is moved while heating, and the scale on the differential head 5-3 can be used to determine whether the inner diameter of the sleeve 19 has increased to meet the assembly size.

[0049] When the inner diameter of the sleeve 19 meets the assembly size, the differential head 5-3 is rotated in the opposite direction to lower the height of the lifting rod 5-1, separate the ranging rod 4 from the inner wall of the sleeve 19 and retract it to the inner side of the sleeve 1-2 to avoid interfering with the installation connection between the sleeve 19 and the output shaft 12; the drive motor 8 can also be used to rotate the transmission worm 7 in the opposite direction to lower the sleeve 1-2 and all structural components located on the sleeve 1-2 as a whole to avoid interfering with the installation connection between the sleeve 19 and the output shaft 12.

[0050] Since the lifting rod 5-1 and the distance measuring rod 4 are in different directions, the tapered portion 5-4 on the lifting rod 5-1 can only drive the distance measuring rod 4 to slide toward the outside of the sleeve, but cannot drive it to retract into the inside of the sleeve 1-2. The operation of retracting the distance measuring rod 4 into the inside of the sleeve 1-2 can be to insert a rod-shaped tool into the inside of the sleeve 19 and slide the distance measuring rod 4. This method is feasible but not convenient enough. Therefore, in some preferred embodiments, a limit switch is set on the sleeve 1-2. The rod 13, return spring 14, slide 15, and stop block 16 are preferably arranged on the inner side wall of the second sleeve 1-2 and arranged in the same direction as the ranging rod 4. The stop block 16 is fixed to the free end of the limit rod 13. The return spring 14 and slide 15 are located between the second sleeve 1-2 and the stop block 16 and are slidably mounted on the limit rod 13. The two ends of the return spring 14 respectively abut the second sleeve 1-2 and the slide 15, and the slide 15 is fixedly connected to the ranging rod 4. When the lifting rod 5-1 moves upward, the ranging rod 4 drives the slide 15 to move, compressing the return spring 14. When the lifting rod 5-1 moves downward, the ranging rod 4 loses the pressure from the lifting rod 5-1, and the return spring 14 drives the ranging rod 4 to return to its original position, improving the convenience of use.

[0051] In order to prevent the ranging rod 4 from slipping off the side wall of the sleeve 2 1-2 when moving with the reset spring 14, an expanded diameter portion 4-2 can be provided at the end of the ranging rod 4 located outside the sleeve 2 1-2, and the size of the expanded diameter portion 4-2 is larger than the through hole of the ranging rod 4 on the sleeve 2 1-2.

[0052] In order to facilitate the installation of shaft sleeves 19 of different sizes, sleeve 1-2 includes at least barrel section 1-21 and barrel section 2 1-22. Barrel section 1-21 is located at the top of barrel section 1-22, and its radial size is smaller than barrel section 2 1-22. Distance measuring rod 4 is arranged on barrel section 2 1-22. Based on the distance between barrel section 1-21 and sleeve 1-1, distance measuring rod 4 can be easily circled in shaft sleeves 19 of different inner diameters placed on sleeve 1-1, and measurement can be carried out. It is easy to use and has strong practicality.

[0053] The heater 3 can be an electromagnetic induction heating coil, which can be sleeved on the outside of the barrel section 1-21.

[0054] An annular boss 17 can be provided on the top of sleeve 1-1. The inner diameter of boss 17 is larger than that of sleeve 1-1, supporting sleeve 19. This accommodates the sloped or convex surface of the sleeve 19's mid-end face, preventing instability during placement. A lifting lug 18 is also provided on the top of sleeve 1-1, located outside boss 17, for mounting telescopic boom 2.

[0055] The telescopic suspension arm 2 at least includes arm 1 2-1, arm 2-2 and cylinder 2-3. The proximal ends of arm 1 2-1 and arm 2 2-2 are rotatably connected, and the separated ends are respectively provided with rotating connectors 2-4. The rotating connectors 2-4 are rotatably connected to the lifting ears 18 and the equipment foundation. The rotating connectors 2-4 can be optionally hooks, lifting rings, rotating pins, etc.; the two ends of the cylinder 2-3 are rotatably connected to the middle parts of arm 1 2-1 and arm 2 2-2 respectively. The distance between the separated ends of arm 1 2-1 and arm 2 2-2 is adjusted by the extension and retraction of the cylinder 2-3 to realize the lifting and lowering of the support frame 1.

[0056] The method of using this auxiliary tool includes the following steps:

[0057] (1) The telescopic suspension arm 2 is rotatably connected to the equipment foundation so that the support frame 1 is located directly below the output shaft 12 of the vertical rolling mill reducer.

[0058] (2) Remove the old shaft sleeve 19: Contract the slide rod of the cylinder 2-3 to reduce the distance between the ends of the support arm 1 2-1 and the support arm 2 2-2, and lift the support frame 1 to get closer to the old shaft sleeve 19; Use the heater 3 to heat the old shaft sleeve 19 to increase its inner diameter, and then separate it from the output shaft 12 and slide it onto the support frame 1; Extend the slide rod of the cylinder 2-3 to increase the distance between the ends of the support arm 1 2-1 and the support arm 2 2-2, lower the support frame 1, and remove the old shaft sleeve 19.

[0059] (3) Installing the new sleeve 19: Place the new sleeve 19 on the sleeve 1-1, heat the new sleeve 19 with the heater 3 to increase its inner diameter, rotate the differential head 5-3 at the same time, use the lifting rod 5-1 to drive the distance measuring rod 4 to slide against the inner wall of the new sleeve 19, and measure its inner diameter; after the assembly dimensions are met, rotate the differential head 5-3 in the opposite direction to separate the distance measuring rod 4 from the new sleeve 19; retract the sliding rod of the cylinder 2-3 to reduce the distance between the ends of the support arm 2-1 and the support arm 2-2, lift the support frame 1 to get close to the output shaft 12, and install the new sleeve 19 on the output shaft 12. After the new sleeve 19 cools down and is firmly installed, use the telescopic suspension arm 2 to lower the support frame 1.

[0060] In actual working conditions, step (1) (2), step (1) (3), or step (1) (2) (3) can be performed as needed. Before and after heating the sleeve 19, the drive motor 8, the transmission worm 7, and the transmission worm wheel 6 can be used to appropriately raise and lower the sleeve 1-2 as needed to adjust the height of the distance measuring rod 4.

[0061] Compared with the prior art, the beneficial effects of the present invention are that the auxiliary tool can support, heat, measure the diameter and lift the shaft sleeve 19, solving the defect that the equipment parts are large and heavy and cannot be directly lifted by the crane in the workshop in a narrow space and directly below the reducer. It can also accurately control the installation dimensions, improve the online hot installation efficiency of the output shaft sleeve of the vertical rolling mill reducer, speed up the installation speed, improve the safety during the installation process, reduce the time spent on replacing damaged equipment, and shorten the downtime of the production line.

[0062] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An auxiliary tool for installing and removing the output shaft sleeve of a vertical rolling mill reducer, characterized in that: The invention comprises a support frame and a telescopic suspension arm, a heater, a ranging rod and a driver arranged thereon. The telescopic suspension arm can drive the support frame to move along its own axial direction. The heater is used to heat the shaft sleeve. The ranging rod is slidably connected to the support frame and is driven by the driver to move along the radial direction of the support frame to measure the inner diameter of the shaft sleeve.

2. The auxiliary tool for installing and removing the output shaft sleeve of the vertical rolling mill reducer according to claim 1, characterized in that: The support frame includes a sleeve 1 and a sleeve 2 that are slidably connected. The ranging rod is arranged on the sleeve 2. The external thread of the sleeve 2 is connected with a transmission worm gear. A transmission worm is provided in the sleeve 1. One end of the transmission worm is connected to the drive motor. The transmission worm gear is meshed with the transmission worm.

3. The auxiliary tool for installing and removing the output shaft sleeve of the vertical rolling mill reducer according to claim 2, characterized in that: The driver includes a lifting rod, a distance adjusting rod and a differential head which are coaxially arranged in sequence. The distance measuring rod passes through the side wall of the second sleeve and abuts the lifting rod located on the inner side thereof; the distance adjusting rod passes through the bottom plate of the second sleeve, and its two ends are respectively connected to the lifting rod and the differential head.

4. The auxiliary tool for installing and removing the output shaft sleeve of the vertical rolling mill reducer according to claim 3, characterized in that: A conical portion is provided at the top end of the lifting rod, and a plurality of ranging rods are distributed around the circumference of the conical portion. The ranging rods are provided with an inclined surface that matches the shape of the conical portion.

5. The auxiliary tool for installing and removing the output shaft sleeve of the vertical rolling mill reducer according to claim 3 or 4, characterized in that: The auxiliary tool also includes a limit rod, the two ends of which are respectively connected to the side wall of the sleeve 2 and the limit block. A return spring and a slide plate are provided between the limit block and the sleeve 2, both of which are slidably mounted on the limit rod, and the ranging rod is fixedly connected to the limit block.

6. The auxiliary tool for installing and removing the output shaft sleeve of the vertical rolling mill reducer according to claim 2, characterized in that: The sleeve 2 at least includes a sleeve section 1 and a sleeve section 2. The sleeve section 1 is located at the top of the sleeve section 2 and has a radial dimension smaller than that of the sleeve section 2. The ranging rod is arranged on the sleeve section 2.

7. The auxiliary tool for installing and removing the output shaft sleeve of the vertical rolling mill reducer according to claim 6, characterized in that: The heater is an electromagnetic induction heating coil, which is sleeved on the outside of the first barrel section.

8. The auxiliary tool for installing and removing the output shaft sleeve of the vertical rolling mill reducer according to claim 2, characterized in that: An annular boss and a lifting lug are provided on the top of the sleeve 1. The inner diameter of the annular boss is larger than the inner diameter of the sleeve 1. The lifting lug is located outside the annular boss and is used to install the telescopic suspension arm.

9. The auxiliary tool for installing and removing the output shaft sleeve of the vertical rolling mill reducer according to claim 1, characterized in that: The telescopic suspension arm comprises at least one arm, two arm and a cylinder. The proximal ends of the arm one and the arm two are rotationally connected, and the separated ends are respectively provided with rotating connecting parts. The two ends of the cylinder are respectively rotationally connected to the middle parts of the arm one and the arm two.

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