Tool for installing lower nut on pull rod of large press

Abstract

The utility model relates to a tool for installing a lower nut on a pull rod of a large press, belongs to the technical field of press pull rod assembly, and solves the problem of difficulty in installing the lower nut on the pull rod of the large press at present. The tool comprises a supporting bottom plate. The chassis is provided with universal wheels, and the universal wheels are arranged on the supporting bottom plate in a rolling mode; the tray is mounted on the chassis through a lifting mechanism; a circular ring groove is formed in the top face of the tray, the multiple balls are installed in the circular ring groove in a rolling mode, and the balls form a bearing assembly used for bearing a lower nut in a dragging mode. When the lower nut is installed on the pull rod, the position of the lower nut before installation can be finely adjusted by means of the universal wheels so that the lower nut can be aligned with the lower end of the pull rod, the lower nut can easily rotate during installation by means of the balls, the lifting mechanism can assist installation personnel in lifting the lower nut, the labor amount of the installation personnel is reduced, and the installation efficiency is improved. Due to the fact that the installation position is more accurate, the phenomenon that the lower nut is stuck in the installation process can be effectively avoided.

Description

Technical Field

[0001] This utility model belongs to the field of press tie rod assembly technology, and specifically relates to a tooling for installing a lower nut on a large press tie rod. Background Technology

[0002] The main load-bearing frame of press-type equipment typically uses a tie rod and nut assembly to connect and fix the upper and lower crossbeams 1 into a whole. For ease of assembly, the nuts on the traditional press tie rods 2 use sawtooth threads, such as... Figure 1 As shown, this nut is designed as a split type, that is, the lower nut on the traditional press pull rod is a split nut 3. Assembly does not require special tooling. The split nut 3 is assembled by manually hoisting it into place and then fixing it with bolt 4. Although this type of nut is relatively easy to assemble, it has many disadvantages.

[0003] Therefore, manufacturers of large precision forging presses have now changed the tie rod nut assembly to a metric thread with higher fitting accuracy, and the lower nut has also been designed as a stronger integral structure. That is, the lower nut used on the press tie rod 2 is now an integral nut 5, as detailed below. Figure 2 As shown. The integral nut 5 is characterized by its large single-piece weight and precise thread fit. During on-site installation, due to the structural limitations of the press, the assembly of the tie rod nut assembly can only be carried out after the upper and lower crossbeams 1 of the press are installed. Because the integral nut 5 is heavy and the nut is installed from bottom to top, it is difficult to accurately position it during the installation process, making the installation very inconvenient. Utility Model Content

[0004] This utility model provides a tooling for installing a lower nut on a large press tie rod, which solves the current problem of installing the lower nut on the tie rod of a large press.

[0005] This utility model is achieved through the following technical solution: a tooling for installing a lower nut on a large press tie rod, comprising:

[0006] Support base plate;

[0007] The chassis is equipped with casters, which are rolled on the supporting base plate.

[0008] A pallet is mounted on the chassis via a lifting mechanism, which is used to drive the pallet to move up and down relative to the chassis.

[0009] A plurality of balls are provided with an annular groove on the top surface of the tray. The balls are rolled in the annular groove and together form a support assembly for supporting the lower nut.

[0010] Furthermore, in order to better realize this utility model, it also includes:

[0011] A shock absorber is mounted on the chassis, and a lifting mechanism is mounted on the shock absorber.

[0012] Furthermore, in order to better realize this utility model, at least two shock absorbers are installed on the chassis, and each shock absorber is equipped with a lifting mechanism. Multiple lifting mechanisms are respectively connected to different positions of the tray to lift different positions of the tray, and each lifting mechanism is configured to lift independently.

[0013] Furthermore, in order to better realize this utility model, the lifting mechanism is a jack.

[0014] Furthermore, in order to better realize this utility model, it also includes:

[0015] A shim is installed under the supporting base plate, the upper surface of which is flat. The shim is used to adjust the supporting base plate so that the upper surface of the supporting base plate is parallel to the horizontal plane.

[0016] Furthermore, in order to better realize this utility model, it also includes:

[0017] An extension rod is provided, and a recessed hole is provided on the outer wall of the lower nut. The extension rod is used to insert into the recessed hole so as to rotate the lower nut.

[0018] Compared with the prior art, this utility model has the following advantages:

[0019] The tooling provided by this utility model for installing a lower nut on a large press tie rod includes a support base plate, a chassis, a tray, a lifting mechanism, and several ball bearings. The chassis is equipped with casters that roll on the top surface of the support base plate, allowing the chassis to move on the support base plate. The tray is mounted on the chassis via the lifting mechanism, which drives the tray to rise and fall relative to the chassis. A circular groove is formed on the top surface of the tray, and several ball bearings are rolled in the circular groove, thus forming a support assembly for supporting the lower nut, which is an integral nut.

[0020] In practical use, first place the chassis on the support plate so that the casters on the chassis can roll on the support plate. Then, install the lifting mechanism on the chassis, and then install the pallet on the lifting mechanism so that the pallet can rise and fall with the lifting mechanism. Next, install the ball bearings in the annular groove on the pallet. Finally, use a hoist or other lifting tool to lift the lower nut and place it flat on the ball bearings. By fine-tuning the chassis, the lower nut is slightly adjusted in the horizontal direction so that the lower nut is aligned with the lower end of the press rod. Then, drive the lifting mechanism to lift the lower nut by moving the pallet. When the lower nut is about to approach the lower end of the rod, rotate the lower nut. Because the lower nut is connected to the ball bearings, the friction force on the lower nut is smaller when rotating, so it can rotate flexibly until the lower nut is connected to the rod. Keep the lifting mechanism rising and rotate the lower nut. In this way, the lower nut can be installed on the lower end of the rod more easily.

[0021] With the aforementioned tooling, when installing the lower nut on the pull rod, the universal caster allows for fine-tuning of the lower nut's position before installation, ensuring more precise alignment of the lower nut with the lower end of the pull rod. The aforementioned ball bearings allow the lower nut to rotate easily during installation. The aforementioned lifting mechanism assists installers in raising the lower nut, reducing their workload and effectively preventing jamming during installation due to the more precise installation position. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the installation structure of a traditional split nut on a press tie rod;

[0024] Figure 2 This is a schematic diagram of the current installation structure of the integral nut on the press tie rod;

[0025] Figure 3 This is a schematic diagram of the tooling provided in this embodiment of the utility model for installing the lower nut on the pull rod of a large press.

[0026] In the picture:

[0027] 1-Lower crossbeam, 2-Tie rod, 3-Split nut, 4-Handling bolt, 5-Integral nut;

[0028] 100-Support base plate, 200-Chassis, 300-Wheel casters, 400-Pattern, 500-Lifting mechanism, 600-Ball bearings, 700-Shock absorber, 800-Push pads, 900-Extension rod. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0030] Example:

[0031] like Figure 3 As shown, the tooling provided in this embodiment for installing the lower nut on the pull rod of a large press includes a support base plate 100, a chassis 200, a pallet 400, a lifting mechanism 500, and several ball bearings 600, wherein:

[0032] The supporting base plate 100 is a flat plate with a flat top surface. In order to ensure that the plane of the supporting base plate 100 is parallel to the horizontal plane, in this embodiment, a shim 800 is also installed under the supporting base plate 100. By adding shims 800 of different thicknesses, the top surface of the supporting base plate 100 is made parallel to the horizontal plane.

[0033] The chassis 200 is also a flat plate, and casters 300 are mounted on the bottom surface of the chassis 200. The casters 300 roll on the top surface of the supporting base plate 100, allowing the chassis 200 to move on the supporting base plate 100. These casters 300 are self-braking; they unlock when the chassis 200 needs to move on the supporting base plate 100 and lock when the chassis 200 is in position. Furthermore, to prevent the chassis 200 from slipping off the supporting base plate 100, an optional implementation method is as follows: a stop block is connected to the outer wall of the supporting base plate 100. The stop block prevents the chassis 200 from sliding off the supporting base plate 100. The stop block can be bolted to the outer wall of the supporting base plate 100, or it can be welded to the outer wall of the supporting base plate 100.

[0034] The pallet 400 is mounted on the chassis 200 via the aforementioned lifting mechanism 500. The lifting mechanism 500 is used to drive the pallet 400 to move up and down relative to the chassis 200. Specifically, when the lifting mechanism 500 rises, it moves the pallet 400 upwards; when the lifting mechanism 500 descends, it moves the pallet 400 downwards. Optionally, the lifting mechanism 500 in this embodiment is a jack, which can be manual or electric. Of course, the lifting mechanism 500 can also be an electric telescopic rod.

[0035] A circular groove is formed at the center of the top surface of the tray 400. Several balls 600 are rolled and installed in the circular groove. Thus, the balls 600 form a support assembly for supporting the lower nut, which is an integral nut 5. When the lower nut is placed flat on the balls 600, the contact between the lower nut and the balls 600 is point contact, and the balls 600 are rolled and connected to the circular groove. This reduces the frictional force experienced by the lower nut when it rotates.

[0036] In practical use, first, place the chassis 200 on the support base plate 100 so that the casters 300 on the chassis 200 can roll on the support base plate 100. Then, install the lifting mechanism 500 on the chassis 200, and then install the pallet 400 on the lifting mechanism 500 so that the pallet 400 can rise and fall with the lifting mechanism 500. Next, install the ball bearings 600 in the annular groove on the pallet 400. Finally, use a hoist or other lifting tool to lift the lower nut and place it flat on the ball bearings 600. Then, make fine adjustments. The chassis 200 drives the lower nut to make slight horizontal adjustments, aligning it with the lower end of the press pull rod. Then, the lifting mechanism 500 drives the pallet 400 to lift the lower nut. As the lower nut approaches the lower end of the pull rod, it is rotated. Because the lower nut is engaged with the ball bearings 600, the friction during rotation is reduced, allowing for flexible rotation. Once the lower nut is aligned with the pull rod, the lifting mechanism 500 remains elevated while the lower nut is rotated. This makes it easier to install the lower nut onto the lower end of the pull rod. It should be noted that initially, the lifting mechanism 500 lowers the pallet 400 to its lowest point. Additionally, before assembling the tooling, the pull rod 2 needs to be adjusted to ensure its central axis is vertical.

[0037] With the aforementioned tooling, when installing the lower nut on the pull rod, the universal wheel 300 allows for fine-tuning of the lower nut's position before installation, ensuring more precise alignment of the lower nut with the lower end of the pull rod. The aforementioned ball bearing 600 allows the lower nut to rotate easily during installation. The aforementioned lifting mechanism 500 assists the installer in lifting the lower nut, not only reducing the installer's workload but also effectively preventing jamming during installation due to the more precise installation position.

[0038] Although the lower nut can rotate flexibly on the tray 400, it is still difficult to turn it directly by hand because of its heavy weight. Therefore, a recessed hole is provided on the outer wall of the lower nut in this embodiment. The tooling provided in this embodiment also includes an extension rod 900, which is inserted into the recessed hole on the outer wall of the lower nut. The installer can rotate the lower nut more easily through the extension rod 900.

[0039] An optional implementation of this embodiment is as follows: The lifting mechanism 500 is mounted on the chassis 200 via a shock absorber 700. Specifically, the shock absorber 700 is first mounted on the chassis 200, and then the lifting mechanism 500 is mounted on the shock absorber 700. With the help of the shock absorber 700, the lifting mechanism 500, the tray 400, and the lower nut mounted thereon can float within a small angle. This better prevents the lower nut from jamming when screwed into the pull rod. It should be noted that the shock absorber 700 in this embodiment is prior art, and therefore will not be described in detail here. For example, the shock absorber 700 is an existing spring damping device, which is purchased. Of course, the selection of the shock absorber 700 must be able to withstand the weight of the lifting mechanism 500, the tray 400, the ball bearing 600, and the lower nut.

[0040] More preferably, at least two shock absorbers 700 are installed on the chassis 200, and each shock absorber 700 is equipped with one of the aforementioned lifting mechanisms 500. Multiple lifting mechanisms 500 are connected to different positions on the tray 400. These lifting mechanisms 500 are evenly distributed below the tray 400, allowing for the lifting of different positions on the tray 400 using different lifting mechanisms 500. Each lifting mechanism 500 is configured for independent lifting. If the lower end of the lower nut and the lower end of the pull rod are aligned so that the central axis of the lower nut is coaxial with the central axis of the pull rod, then the multiple lifting mechanisms 500 will lift synchronously, thereby driving the tray 400 and the lower nut to rise smoothly. If the central axis of the lower nut and the pull rod have a certain angle, the lower nut can be slightly deflected by fine-tuning the corresponding lifting mechanism 500, making the central axis of the lower nut collinear with the central axis of the pull rod, and then the multiple lifting mechanisms 500 will be driven to rise synchronously.

[0041] Of course, the shock absorber 700 can be omitted, and the lifting mechanism 500 can be directly installed on the chassis 200.

[0042] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope described in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A tooling for installing a lower nut onto a large press tie rod, characterized in that, include: Support base plate (100); The chassis (200) is equipped with casters (300) which are rolled on the supporting base plate (100); A pallet (400) is mounted on the chassis (200) via a lifting mechanism (500), the lifting mechanism (500) being used to drive the pallet (400) to rise or fall relative to the chassis (200); A plurality of balls (600) are provided with an annular groove on the top surface of the tray (400). The plurality of balls (600) are all rolled in the annular groove, and the plurality of balls (600) form a support assembly for supporting the lower nut. Shock absorber (700), the shock absorber (700) is mounted on the chassis (200), and the lifting mechanism (500) is mounted on the shock absorber (700); At least two shock absorbers (700) are installed on the chassis (200), and each shock absorber (700) is equipped with a lifting mechanism (500). The multiple lifting mechanisms (500) are respectively connected to different positions of the tray (400) to lift the tray (400) to different positions, and each lifting mechanism (500) is configured to lift independently.

2. The tooling for installing the lower nut on the tie rod of a large press according to claim 1, characterized in that: The lifting mechanism (500) is a jack.

3. The tooling for installing a lower nut on a large press tie rod according to any one of claims 1-2, characterized in that, Also includes: A shim (800) is installed under the support base plate (100). The upper surface of the support base plate (100) is flat. The shim (800) is used to adjust the support base plate (100) so that the upper surface of the support base plate (100) is parallel to the horizontal plane.

4. The tooling for installing a lower nut on a large press tie rod according to any one of claims 1-2, characterized in that, Also includes: An extension rod (900) is provided, and a recessed hole is provided on the outer wall of the lower nut. The extension rod (900) is used to insert into the recessed hole so as to rotate the lower nut.

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