A special tool for disassembling the connecting rod bushing of a rolling mill drive.

Abstract

This utility model provides a special tool for disassembling the connecting rod bushing of a rolling mill transmission, relating to the field of rolling mill transmission technology. It includes a screw, a support frame, a thrust ball bearing, a flanged copper sleeve, a fixing nut, and a nut clamping plate. The nut clamping plate has four hooks evenly welded around its circumference and a handle; its diameter is 0.5mm to 1mm smaller than the inner diameter of the bushing. One end of the screw has a hexagonal head, and the other end has a trapezoidal thread, which screws into the nut clamping plate. The support frame has bolt through holes at both ends, which are fixed to the connecting rod shaft end cap by bolts. A thrust ball bearing is installed between the screw and the support frame to reduce friction, and the flanged copper sleeve limits axial clearance. The fixing nut is assembled as a whole. This utility model effectively solves the technical problems of difficult and inefficient disassembly of traditional bushings. By rotating the screw, the hooked nut clamping plate moves axially, and in conjunction with the support frame, it is fixed to the connecting rod shaft end cap, achieving non-cutting disassembly of the interference fit bushing.

Description

Technical Field

[0001] This utility model relates to the field of rolling mill transmission technology, and more specifically, to a special tool for disassembling the connecting rod bushing of a rolling mill transmission. Background Technology

[0002] In the transmission system of cold rolling mills, the inner bushing of the transmission connecting rod is a critical and vulnerable component. Long-term wear leads to increased connecting rod oscillation, which can easily cause equipment accidents, requiring replacement every three months. However, this bushing is installed in a narrow space inside the connecting rod shaft and uses an interference fit assembly, making traditional disassembly methods extremely difficult. Replacement usually relies on hot work, which not only easily damages the bushing and the mating surfaces of the shaft but also presents the following problems: First, high safety risks; the complex environment of the rolling mill makes hot work prone to triggering fires; second, low efficiency; the cutting process is time-consuming and labor-intensive, requiring multiple people and taking over two hours for a single replacement; third, equipment damage; the high temperature of cutting can damage the workpiece's precision, affecting assembly quality. Although the industry has attempted to optimize the disassembly process, existing technology lacks specialized tools, making it impossible to efficiently and non-destructively disassemble the bushing without hot work.

[0003] Therefore, there is an urgent need for a special tool with a simple structure and safe operation to solve the problems of difficult disassembly of bushings, low efficiency and safety hazards. Utility Model Content

[0004] To address the aforementioned technical problem, a special tool for disassembling the connecting rod bushing of a rolling mill is provided. By rotating a screw, the tool drives a nut clamping plate with a hook to move axially, and works in conjunction with a support frame to fix it to the end cover of the connecting rod shaft, thereby achieving non-cutting disassembly of the interference fit bushing.

[0005] To achieve the above objectives, this utility model provides a special tool for disassembling the transmission connecting rod bushing of a rolling mill, comprising: a screw, a support frame, a thrust ball bearing, a flanged copper bushing, a fixing nut, and a nut clamping plate;

[0006] The support frame has bolt through holes at both ends for positioning with the bolt holes of the connecting rod shaft end cap; one end of the screw has a hexagonal head and the other end has a trapezoidal thread, which is screwed into the nut retainer; the thrust ball bearing is located between the screw and the pressing end of the support frame; the flanged copper sleeve is located at the other end of the screw, and the fixing nut assembles the support frame and the screw into an integral part; the nut retainer has a handle with four hooks evenly distributed around its circumference for locking the outer edge of the inner end of the bushing.

[0007] Furthermore, the diameter of the nut clamping plate is 0.5mm to 1mm smaller than the inner diameter of the connecting rod bushing.

[0008] Furthermore, the screw is connected to the nut clamping plate via a trapezoidal thread to drive the nut clamping plate to move outward.

[0009] Furthermore, the support frame is positioned by the bolt through hole and the bolt hole of the connecting rod shaft end cap to fix the position of the support frame.

[0010] Furthermore, the thrust ball bearing is used to reduce the frictional force when the screw rotates, so that the screw rotates smoothly.

[0011] Furthermore, the flanged copper sleeve is used to ensure the accurate relative position between the screw and the support frame.

[0012] By adopting the above technical solution, this utility model has the following advantages compared with the prior art:

[0013] 1. This utility model provides a special tool for disassembling the transmission connecting rod bushing of a rolling mill. Through the mechanical transmission structure of the special tool driving the nut clamping plate by the screw, the interference fit bushing can be quickly disassembled, saving the time of each replacement and improving the work efficiency.

[0014] 2. This utility model provides a special tool for disassembling the transmission connecting rod bushing of a rolling mill, replacing the traditional cutting method. It uses a mechanical structure of bolt fixing of the support frame and hook clamping to eliminate the fire hazard between rolling mill stands. Attached Figure Description

[0015] 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of a special tool for disassembling the connecting rod bushing of a rolling mill, as described in this utility model.

[0017] In the diagram: 1. Bolt positioning hole; 2. Support frame; 3. Screw; 4. Thrust ball bearing; 5. Flanged copper sleeve; 6. Fixing nut; 7. Trapezoidal thread; 8. Handle; 9. Nut retainer; 10. Hook. Detailed Implementation

[0018] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this utility model or its application or use. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0020] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0021] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0022] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0023] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0024] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0025] like Figure 1 As shown, this utility model provides a special tool for disassembling the transmission connecting rod bushing of a rolling mill, including: screw 3, support frame 2, thrust ball bearing 4, flanged copper sleeve 5, fixing nut 6, and nut clamping plate 9;

[0026] The support frame 2 has bolt through holes at both ends for fixed connection with the bolt positioning holes 1 of the connecting rod shaft end cap; one end of the screw 3 is a hexagonal head and the other end is a trapezoidal thread 7, which is screwed into the nut clamping plate 9; the thrust ball bearing 4 is located between the screw 3 and the pressing end of the support frame 2; the flanged copper sleeve 5 is located at the other end of the screw 3, and the fixing nut 6 assembles the support frame 2 and the screw 3 into an integral part; the nut clamping plate 9 is provided with a handle 8, and four hooks 10 are evenly distributed around its circumference for clamping the outer edge of the inner end of the bushing.

[0027] Furthermore, the diameter of the nut retainer 9 is 0.5mm to 1mm smaller than the inner diameter of the connecting rod bushing, ensuring that the nut retainer 9 can be smoothly inserted into the bushing and avoiding jamming.

[0028] Furthermore, the screw 3 is connected to the nut clamping plate 9 via a trapezoidal thread 7 to drive the nut clamping plate 9 to move outward, converting rotational motion into linear traction force to efficiently pull the bushing.

[0029] Furthermore, the support frame 2 is fixed in position by means of the bolt through hole and the bolt positioning hole 1 of the connecting rod shaft end cover, so as to ensure that the support frame 2 does not shift when the screw 3 rotates, and the force is fully applied to the bushing disassembly.

[0030] Furthermore, the thrust ball bearing 4 is used to reduce the frictional force when the screw 3 rotates, so that the screw 3 rotates smoothly, reducing rotational resistance and making operation easier.

[0031] Furthermore, the flanged copper sleeve 5 is used to ensure the accurate relative position between the screw 3 and the support frame 2, prevent the screw 3 from deflecting, and ensure the accurate direction of the traction force.

[0032] In actual use of this embodiment: the trapezoidal thread 7 end of the screw 3 is screwed into the nut clamp 9 to form a threaded transmission connection. A thrust ball bearing 4 is installed between the screw 3 and the pressing end of the support frame 2 to reduce friction during rotation. A flanged copper sleeve 5 is installed at the other end of the screw 3 to ensure the accurate relative position between the screw 3 and the support frame 2. The support frame 2 and the screw 3 are assembled into an integral part using a fixing nut 6.

[0033] During the unit maintenance time, align the bolt through holes at both ends of the support frame 2 with the bolt holes of the connecting rod shaft end cover, fix the position of the support frame 2 with bolts, hold the handle 8 of the nut clamp plate 9 and put it into the bushing, so that the four hooks 10 are locked in the outer edge of the inner end of the bushing.

[0034] Rotate the hexagonal head on the end face of screw 3 with a wrench. Since the support frame 2 is fixed, the rotation of screw 3 causes the nut clamp 9 to move outward. The hook 10 of the nut clamp 9 pulls the outer edge of the inner end of the bushing, causing the bushing to gradually disengage from the inside of the connecting rod shaft, and finally completes the disassembly.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model 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. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A special tool for dismounting a shaft sleeve of a rolling mill drive connecting rod, characterized in that, include: Screw, support frame, thrust ball bearing, flanged copper sleeve, fixing nut, nut clamp; The support frame has bolt through holes at both ends for positioning with the bolt holes of the connecting rod shaft end cap; one end of the screw has a hexagonal head and the other end has a trapezoidal thread, which is screwed into the nut retainer; the thrust ball bearing is located between the screw and the pressing end of the support frame; the flanged copper sleeve is located at the other end of the screw, and the fixing nut assembles the support frame and the screw into an integral part; the nut retainer has a handle with four hooks evenly distributed around its circumference for locking the outer edge of the inner end of the bushing.

2. A special tool for disassembling a shaft sleeve of a transmission connecting rod of a rolling mill according to claim 1, characterized in that, The diameter of the nut clamp is 0.5mm to 1mm smaller than the inner diameter of the connecting rod bushing.

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