Special tool for installing pull rod nut of large hydraulic machine

Abstract

The utility model discloses a special tool for installing a pull rod nut of a large hydraulic machine. Idler wheels are arranged at the bottom of a frame. The hydraulic cylinder is mounted on the frame and is provided with a piston rod which is vertically arranged; the rotating assembly comprises a thrust bearing, a bearing fixing shaft and a bearing seat, the thrust bearing is provided with a first shaft ring and a second shaft ring which can rotate relatively, the piston rod is sleeved with the bearing fixing shaft, the bearing fixing shaft is sleeved with the bearing seat and matched with the bearing fixing shaft to form a first mounting groove with an upward opening, and the bearing fixing shaft is sleeved with the thrust bearing; the first shaft washer is mounted in the first mounting groove and is clamped between the bearing seat and the bearing fixing shaft; the bearing table is connected to the first shaft washer and is coaxially arranged with the piston rod.

Description

Technical Field

[0001] The present application belongs to the technical field of hydraulic presses, and more specifically, relates to a special tool for installing a tie rod nut of a large hydraulic press. Background Art

[0002] In industrial production, the installation of tie rod nuts for large hydraulic presses is an important task. Since the weight of a single tie rod nut of a large multi-directional forging hydraulic press can reach 2 tons, and Figure 4 As shown in the figure, generally large hydraulic presses are installed in foundation pits. When installing a nut located at the bottom of the tie rod in the tie rod nut, it is inconvenient to enter with a lifting tool, and using an ordinary jack for installation is time-consuming, labor-intensive, and unsafe, which greatly limits the installation efficiency of the nut. Therefore, it is necessary to solve the above technical problems. Summary of the invention

[0003] The purpose of the embodiments of the present application is to provide a special tool for installing the tie rod nut of a large hydraulic press, so as to solve the technical problem of the difficulty in installing the tie rod nut of a large hydraulic press in the prior art.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the present application is: to provide a special tool for installing a tie rod nut of a large hydraulic press, comprising:

[0005] A frame with rollers at the bottom;

[0006] a hydraulic cylinder mounted on the frame and having a vertically disposed piston rod;

[0007] A rotating assembly, comprising a thrust bearing, a bearing fixing shaft and a bearing seat, wherein the thrust bearing has a first shaft ring and a second shaft ring capable of relatively rotating, the bearing fixing shaft is sleeved on the piston rod and has a shaft diameter adapted to the first shaft ring and the bearing seat, the bearing seat is sleeved on the bearing fixing shaft and cooperates with the bearing fixing shaft to form a first mounting groove with an open opening facing upward, the thrust bearing is sleeved on the bearing fixing shaft, the first shaft ring is installed inside the first mounting groove and is sandwiched between the bearing seat and the bearing fixing shaft;

[0008] The object support platform is connected to the first shaft ring and is arranged coaxially with the piston rod.

[0009] Optionally, a second mounting groove with an opening facing downward is provided at the bottom of the object support platform, and the second shaft ring is installed in the second mounting groove and a rotation gap is left between the second shaft ring and the bearing fixing shaft.

[0010] Optionally, the outer diameter of the second shaft ring is adapted to the diameter of the second mounting groove.

[0011] Optionally, a first positioning flange for supporting the bearing seat extends from the bottom of the bearing fixing shaft from the inside to the outside;

[0012] The bearing seat abuts against the first positioning flange.

[0013] Optionally, the rotating assembly further comprises a connecting sleeve and a locking nut threadedly connected to the piston rod;

[0014] A second positioning flange for carrying the bearing fixing shaft extends from the inside to the outside at the bottom of the connecting sleeve. The bearing fixing shaft abuts against the second positioning flange and is clamped between the second positioning flange and the locking nut.

[0015] Optionally, two locking nuts are provided.

[0016] Optionally, the piston rod forms a step surface perpendicular to its own axial direction, and the connecting sleeve abuts against the step surface.

[0017] Optionally, the rotating assembly further comprises an end cover detachably connected to the bearing fixed shaft, and a gap is formed between the end cover and the second shaft ring;

[0018] At least a portion of the support platform is movably mounted within the gap.

[0019] Optionally, the special tool for installing the tie rod nut of a large hydraulic press further comprises a guide rod slidably connected to the frame;

[0020] The guide rod is connected to the bearing seat and is parallel to the piston rod.

[0021] Optionally, four guide rods are evenly arranged around the circumference of the piston rod.

[0022] The beneficial effect of the special tool for installing the pull rod nut of a large hydraulic press provided by the present application is that: compared with the prior art, the bottom of the frame in the present application is provided with rollers, which can facilitate the movement of the frame. A hydraulic cylinder is installed on the frame and the piston rod of the hydraulic cylinder is vertically arranged. The support platform is connected to the piston rod through a thrust bearing and can rotate around the central axis of the piston rod. Therefore, the special tool can be placed in the foundation pit, and then the nut is hoisted onto the support platform. Then, the frame is moved to the bottom of the pull rod through the roller, and the hydraulic cylinder is operated to lift the nut. When the inner thread of the nut contacts the outer thread of the pull rod, the nut is manually rotated. Since the thrust bearing is below the support platform, the rotational force required for the support platform is greatly reduced. When the nut is completely rotated onto the pull rod, the piston rod of the hydraulic cylinder can be operated to descend and the frame can be removed, which greatly reduces the difficulty of installing the nut, which is far superior to the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0024] Figure 1 A cross-sectional view of a special tool for installing a tie rod nut of a large hydraulic press provided in an embodiment of the present application;

[0025] Figure 2 The overall structure of the special tool for installing the tie rod nut of a large hydraulic press provided in the embodiment of the present application is schematically shown. Figure 1 ;

[0026] Figure 3 The overall structure of the special tool for installing the tie rod nut of a large hydraulic press provided in the embodiment of the present application is schematically shown. Figure 2 ;

[0027] Figure 4 A schematic diagram of the working status of the special tool for installing the tie rod nut of a large hydraulic press provided in an embodiment of the present application.

[0028] Among them, the reference numerals in the figure are: 101, frame; 102, roller; 201, hydraulic cylinder; 202, piston rod; 301, thrust bearing; 302, bearing fixing shaft; 303, bearing seat; 304, first shaft ring; 305, second shaft ring; 306, first mounting groove; 307, support platform; 308, second mounting groove; 309, first positioning flange; 310, connecting sleeve; 311, locking nut; 312, second positioning flange; 313, step surface; 314, end cover; 315, spacer; 400, guide rod; 500, pull rod; 600, foundation pit; 700, nut. DETAILED DESCRIPTION

[0029] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0030] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0031] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application 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 should not be understood as a limitation on the present application.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0033] Please also read Figures 1 to 4 Now, a special tool for installing a tie rod nut of a large hydraulic press provided in an embodiment of the present application is described. The special tool for installing a tie rod nut of a large hydraulic press comprises a frame 101, a hydraulic cylinder 201, a rotating assembly and a support platform 307, wherein:

[0034] The frame 101 is provided with a roller 102 at the bottom, so that the frame 101 can be conveniently moved by the roller 102. The hydraulic cylinder 201 is mounted on the frame 101 and has a vertically arranged piston rod 202; the rotating assembly includes a thrust bearing 301, a bearing fixing shaft 302 and a bearing seat 303, the thrust bearing 301 has a first shaft ring 304 and a second shaft ring 305 that can rotate relatively, the bearing fixing shaft 302 is sleeved on the piston rod 202 and has an axis diameter adapted to the first shaft ring 304 and the bearing seat 303, the bearing seat 303 is sleeved on the bearing fixing shaft 302 and cooperates with the bearing fixing shaft 302 to form a first installation groove 306 with an open upward, the thrust bearing 301 is sleeved on the bearing fixing shaft, the first shaft ring 304 is installed inside the first installation groove 306 and is sandwiched between the bearing seat 303 and the bearing fixing shaft; the support platform 307 is connected to the first shaft ring 304 and is coaxially arranged with the piston rod 202.

[0035] According to the above structure provided in this embodiment, the first shaft ring 304 of the thrust bearing 301 is clamped between the bearing seat 303 and the bearing fixing shaft 302 and remains stationary, and the bearing fixing shaft 302 is installed on the piston rod 202 and can be raised or lowered in the height direction by the piston rod 202. The support platform 307 is connected to the second shaft ring 305 of the thrust bearing 301 and can rotate around the central axis of the piston rod 202. Therefore, the special tool can be placed in the foundation pit 600, and then the nut 700 can be lifted onto the object supporting platform 307. Then, the 101 frame can be moved to the bottom of the pull rod 500 by the roller, and the hydraulic cylinder 201 can be operated to lift the nut 700. When the inner thread of the nut 700 contacts the outer thread of the pull rod 500, the nut 700 can be rotated manually. Since the thrust bearing 301 is under the object supporting platform 307, the rotational force required for the object supporting platform 307 is greatly reduced, that is, the nut 700 can be easily rotated. While rotating the nut 700, the hydraulic cylinder 201 can be continued to be operated to appropriately lift up and cooperate with the rotation and rise of the nut 700 to further achieve the effect of saving effort. When the nut 700 is completely rotated onto the pull rod 500, the piston rod 202 of the hydraulic cylinder 201 can be operated to descend and remove the frame 101, which greatly reduces the difficulty of installing the nut 700 and is far superior to the existing technology.

[0036] In another embodiment of the present application, please refer to Figures 1 to 4 The bottom of the support platform 307 is provided with a second installation groove 308 with an opening facing downward, and the second shaft ring 305 is installed in the second installation groove 308 and a rotation gap is left between the second shaft ring 305 and the bearing fixed shaft 302. According to the above structure provided in this embodiment, the bottom of the support platform 307 is sleeved on the second shaft ring 305 through the second installation groove 308, which can effectively prevent the support platform 307 from being separated from the second shaft ring 305.

[0037] In another embodiment of the present application, please refer to Figures 1 to 4 The outer diameter of the second shaft ring 305 is adapted to the diameter of the second installation groove 308. According to the above structure provided in this embodiment, the second shaft ring 305 can be tightly and stably connected with the support platform 307, further improving the connection stability between the two.

[0038] In another embodiment of the present application, please refer to Figures 1 to 4 The bottom of the bearing fixing shaft 302 extends from the inside to the outside to form a first positioning flange 309 for supporting the bearing seat 303, and the bearing seat 303 abuts against the first positioning flange 309. According to the above structure provided in this embodiment, the first positioning flange 309 can significantly improve the installation stability of the bearing seat 303, so that the bearing seat 303 and the bearing fixing shaft 302 can have a relatively determined positional relationship.

[0039] In another embodiment of the present application, please refer to Figures 1 to 4 The rotating assembly also includes a connecting sleeve 310 and a locking nut 311 that are threadedly connected to the piston rod 202. The bottom of the connecting sleeve 310 extends from the inside to the outside to form a second positioning flange 312 for supporting the bearing fixing shaft 302. The bearing fixing shaft 302 abuts against the second positioning flange 312 and is clamped between the second positioning flange 312 and the locking nut 311. According to the above structure provided in this embodiment, the second positioning flange 312 can significantly improve the installation stability of the bearing fixing shaft 302. In addition, according to the above structure provided in this embodiment, the mass of the bearing fixing shaft 302 can be significantly reduced, so that the hydraulic cylinder 201 can drive the support platform 307 to rise or fall with less power, thereby achieving the effect of energy saving and emission reduction. Furthermore, in another embodiment of the present application, please refer to Figures 1 to 4 Two locking nuts 311 are provided, which can further improve the installation stability of the bearing fixing shaft 302.

[0040] In another embodiment of the present application, please refer to Figures 1 to 4 The piston rod 202 forms a step surface 313 perpendicular to its own axial direction, and the connecting sleeve 310 abuts against the step surface 313. According to the above structure provided in this embodiment, the connecting sleeve 310 can be kept in a fixed position on the piston rod 202, so that the special tool for installing the tie rod nut of a large hydraulic press provided in this embodiment can be used more stably.

[0041] In another embodiment of the present application, please refer to Figures 1 to 4 , the rotating assembly also includes an end cap 314 detachably connected to the bearing fixed shaft 302, a gap 315 is formed between the end cap 314 and the second shaft ring 305, and at least a part of the support platform 307 is movably installed in the gap 315. According to the above structure provided in this embodiment, the end cap 314 can effectively prevent the support platform 307 and the second shaft ring 305 from being separated, and has a good and stable connection effect. It should be noted that in order to avoid the end cap 314 from affecting the support platform 307, the height of the end cap 314 is usually set to be lower than the surface of the support platform 307 for supporting the nut 700, so as to avoid interference with the placement of the nut 700.

[0042] In another embodiment of the present application, please refer to Figures 1 to 4 The large hydraulic press tie rod nut installation tool also includes a guide rod 400 slidably connected to the frame 101, and the guide rod 400 is connected to the bearing seat 303 and parallel to the piston rod 202. According to the above structure provided in this embodiment, the guide rod 400 can significantly improve the stability of the up and down movement of the support platform 307. Further, in another embodiment of the present application, please refer to Figures 1 to 4Four guide rods 400 are evenly arranged around the circumference of the piston rod 202, which has a more stable guiding effect.

[0043] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A special tool for installing tie rod nuts of large hydraulic presses, characterized in that: include: A frame (101) having a roller (102) disposed at the bottom; A hydraulic cylinder (201) mounted on the frame (101) and having a vertically arranged piston rod (202); A rotating assembly, comprising a thrust bearing (301), a bearing fixing shaft (302) and a bearing seat (303), wherein the thrust bearing (301) has a first shaft ring (304) and a second shaft ring (305) which are capable of relatively rotating, the bearing fixing shaft (302) is sleeved on the piston rod (202) and has an axis diameter adapted to the first shaft ring (304) and the bearing seat (303), the bearing seat (303) is sleeved on the bearing fixing shaft (302) and cooperates with the bearing fixing shaft (302) to form a first installation groove (306) which is open upward, the thrust bearing (301) is sleeved on the bearing fixing shaft, the first shaft ring (304) is installed inside the first installation groove (306) and is sandwiched between the bearing seat (303) and the bearing fixing shaft; The object support platform (307) is connected to the first shaft ring (304) and is arranged coaxially with the piston rod (202).

2. The special tool for installing the tie rod nut of a large hydraulic press according to claim 1, characterized in that: A second installation groove (308) with an opening facing downward is provided at the bottom of the object support platform (307), and the second shaft ring (305) is installed in the second installation groove (308) and a rotation gap is left between the second shaft ring (305) and the bearing fixing shaft (302).

3. The special tool for installing the tie rod nut of a large hydraulic press according to claim 2, characterized in that: The outer diameter of the second shaft ring (305) is adapted to the diameter of the second mounting groove (308).

4. The special tool for installing the tie rod nut of a large hydraulic press according to claim 1, characterized in that: A first positioning flange (309) for supporting the bearing seat (303) extends from the inside to the outside at the bottom of the bearing fixing shaft (302); The bearing seat (303) abuts against the first positioning flange (309).

5. The special tool for installing the tie rod nut of a large hydraulic press according to claim 1, characterized in that: The rotating assembly further comprises a connecting sleeve (310) and a locking nut (311) threadedly connected to the piston rod (202); A second positioning flange (312) for supporting the bearing fixing shaft (302) extends from the inside to the outside at the bottom of the connecting sleeve (310); the bearing fixing shaft (302) abuts against the second positioning flange (312) and is clamped between the second positioning flange (312) and the locking nut (311).

6. The special tool for installing the tie rod nut of a large hydraulic press according to claim 5, characterized in that: Two locking nuts (311) are provided.

7. The special tool for installing the tie rod nut of a large hydraulic press according to claim 5, characterized in that: The piston rod (202) forms a step surface (313) perpendicular to its own axial direction, and the connecting sleeve (310) abuts against the step surface (313).

8. The special tool for installing tie rod nuts of large hydraulic presses according to claim 1, characterized in that: The rotating assembly further comprises an end cover (314) detachably connected to the bearing fixing shaft (302), and a gap (315) is formed between the end cover (314) and the second shaft ring (305); At least a portion of the object support platform (307) is movably installed in the space (315).

9. The special tool for installing tie rod nuts of large hydraulic presses according to claim 1, characterized in that: The large hydraulic press tie rod nut installation special tool also includes a guide rod (400) slidably connected to the frame (101); The guide rod (400) is connected to the bearing seat (303) and is parallel to the piston rod (202).

10. The special tool for installing tie rod nuts of large hydraulic presses according to claim 9, characterized in that: Four guide rods (400) are evenly arranged around the circumference of the piston rod (202).

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