Stable transmission device of horizontal rolling mill

Abstract

The utility model relates to a stable transmission device of a horizontal rolling mill. The stable transmission device comprises an outer tooth flat sleeve, a drum-shaped roller, an inner tooth sleeve, an outer tooth spline, an inner tooth spline, a bracket body, a sliding block and a spring buffering structure. The outer tooth flat sleeve is connected with the inner tooth sleeve through a drum-shaped roller, the end part of the outer tooth flat sleeve is fixedly connected with an ejector rod, a disc spring is arranged between the ejector rod and the inner tooth sleeve, an outer tooth spline is sleeved in the inner tooth sleeve, and an inner tooth spline is sleeved outside the outer tooth spline; the spring buffering structure is connected with the bracket body, the bottom of the spring buffering structure is connected with the sliding block, and the outer tooth spline is connected with the sliding block through the bearing seat. The utility model has the advantages that the axial swing angle of the rotating shaft is increased, and the middle of the rotating shaft is not provided with a bendable part, so that the drooping of the rotating shaft caused by dead weight is overcome, the shaking of the rotating shaft in the operation process is avoided, the rotating shaft and the roller are enabled to operate stably, the rolled material type is stabilized, and the steel piling accident caused by unstable transmission of the rolling mill is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of rolling mills, and in particular relates to a stable transmission device of a horizontal rolling mill. Background Art

[0002] The small-scale rolling mill of a certain factory mainly produces rebar. The rotating shaft of the horizontal rolling mill in the medium rolling mill group is a universal cross shaft structure. Figure 1 During the production process, the horizontal rolling mill transmission system has a large amount of shaking, and the vibration impacts the elastic damping body of the roller, causing the roller gap to be unstable, the rolled material shape to be unstable, and steel piling and pulling will occur when entering the finishing mill. It is difficult for operators to adjust, affecting the production rhythm and product yield. The main reason for the large amount of shaking in the transmission equipment of the intermediate rolling horizontal rolling mill is that the connecting shaft rotates out of center during long-term operation. Figure 2 The rotating shaft itself bounces and hits the bracket, causing the rotating shaft and bracket to wear out too quickly, running unsteadily, affecting production efficiency and product quality. In addition, there are a large number of key screws inside the rotating shaft head. When the transmission equipment shakes a lot during operation, the damage frequency is high. The daily inspection of the internal state of the rotating shaft cannot directly discover and solve the problem, resulting in rapid wear and tear of the shaft and a short lifespan. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, the purpose of the utility model is to provide a stable transmission device for a horizontal rolling mill, solve the problem of eccentric rotation of the connecting shafts of the transmission system of the intermediate rolling mill group, and make the transmission of the intermediate rolling mill group stable.

[0004] To achieve the above purpose, the utility model is implemented through the following technical solutions:

[0005] A smooth transmission device for a horizontal rolling mill comprises an external gear flat sleeve, a drum roller, an internal gear sleeve, an external gear spline, an internal gear spline, a bracket body, a slider, and a spring buffer structure; the external gear flat sleeve is connected to the internal gear sleeve through the drum roller, a push rod is fixedly connected to the end of the external gear flat sleeve, a disc spring is provided between the push rod and the internal gear sleeve, the internal part of the internal gear sleeve is sleeved with an external gear spline, and the external part of the external gear spline is sleeved with an internal gear spline; the spring buffer structure is connected to the bracket body, the bottom of the spring buffer structure is connected to the slider, and the external gear spline is connected to the slider through a bearing seat.

[0006] The spring buffer structure includes a buffer spring, a buffer rod, an adjusting nut, a limit seat 1, and a limit seat 2. The top of the buffer spring is connected to the limit seat 1, the bottom of the spring is connected to the limit seat 2, the limit seat 2 is fixedly connected to the bracket body, the top of the buffer rod is threadedly connected to the adjusting nut, and the buffer rod passes through the limit seat 1, the buffer spring, the limit seat 2 and is fixedly connected to the slider.

[0007] The inner part of the inner gear sleeve is provided with teeth matching with the outer gear splines.

[0008] The maximum angle between the central axes of the outer gear flat sleeve and the inner gear sleeve under load is 5°.

[0009] One end of the inner gear sleeve is provided with a positioning hole, and the other end is connected with the outer gear flat sleeve.

[0010] The outer portion of the inner gear sleeve is connected to the bearing seat.

[0011] One end of the internal tooth spline away from the external tooth spline is connected to a cross-shaft universal coupling.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The smooth transmission device of the horizontal rolling mill connects the roller side structure of the rotating shaft with an external gear flat sleeve, a drum roller, and an internal gear sleeve to form a structure similar to a self-aligning bearing, thereby increasing the axial swing angle of the rotating shaft.

[0014] 2. The axial swing angle force position of the rotating shaft is located above the outer gear flat sleeve, with a spline at the back and no bending place in the middle, which overcomes the sagging caused by the deadweight of the rotating shaft, avoids the shaking during the operation of the rotating shaft, makes the rotating shaft and the roller run smoothly, stabilizes the rolled material shape, and solves the steel pile accident caused by the unstable transmission of the rolling mill. The utility model is convenient for operators to adjust and is conducive to improving the overall product quality.

[0015] 3. The outer gear flat sleeve and the inner gear sleeve are positioned by disc springs and push rods, which makes the connection and positioning convenient and accurate, and more stable during use. There are no key screws inside the rotating shaft, which is more convenient for inspection and maintenance. Only regular oiling is required. Compared with the original rotating shaft, the time for changing the roller is significantly shortened.

[0016] 4. The spring buffer structure can position the rotating shaft independently, and the height of the spring buffer structure can be adjusted according to the roll gap size of the roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the original rotating shaft.

[0018] Figure 2 It is a schematic diagram of the structure of the original bracket.

[0019] Figure 3 It is a structural schematic diagram of the utility model.

[0020] Figure 4 It is a schematic diagram of the connection between the bracket and the slider.

[0021] Figure 5 It is a schematic diagram of the spring buffer structure.

[0022] In the figure: 1-external tooth flat sleeve 2-drum roller 3-internal tooth sleeve 4-top rod 5-bearing seat 6-external tooth spline 7-internal tooth spline 8-cross shaft type universal coupling 9-adjusting nut 10-spring buffer structure 11-slider 1 12-bracket body 13-slider 2 14-rotating shaft 15-universal cross shaft 101-buffer spring 102-buffer rod 103-limit seat 1 104-limit seat 2. DETAILED DESCRIPTION

[0023] The present invention is described in detail below in conjunction with the accompanying drawings of the specification, but it should be noted that the implementation of the present invention is not limited to the following embodiments.

[0024] See Figure 3-Figure 4 A stable transmission device for a horizontal rolling mill includes a rotating shaft 14, a bracket body 12, a slider, and a spring buffer structure 10; the rotating shaft 14 includes an outer tooth flat sleeve 1, a drum roller 2, an inner tooth sleeve 3, an outer tooth spline 6, and an inner tooth spline 7. The outer tooth flat sleeve 1 is connected to the inner tooth sleeve 3 through the drum roller 2 to form a structure similar to a self-aligning bearing, so that the maximum angle between the center axis of the outer tooth flat sleeve 1 and the inner tooth sleeve 3 under load is 5°, and the maximum bending angle under normal conditions is 6°, which is much smaller than the bending angle of 15° of the original rotating shaft. The smaller the bending angle, the more stable the rotating shaft 14 is and the longer the service life is. A push rod 4 is fixedly connected to the end of the outer tooth flat sleeve 1, and a positioning hole (blind hole) is opened at the center of the end face of the inner tooth sleeve 3. A disc spring is arranged in the positioning hole, and the disc spring is arranged between the push rod 4 and the inner tooth sleeve 3. The push rod 4 and the disc spring play a positioning and buffering role. The inner part of the inner gear sleeve 3 is sleeved with an outer gear spline 6, and the outer part of the outer gear spline 6 is sleeved with an inner gear spline 7; the outer part of the inner gear sleeve 3 is connected to the bearing seat 5, and the axial swing angle force position of the rotating shaft 14 is located above the outer gear flat sleeve 1.

[0025] Among them, the drum roller 2 is a columnar structure with a thick middle and thin ends. The outer surface of the external gear flat sleeve 1 and the inner ring of the internal gear sleeve 3 are both provided with concave surfaces, and the torque is transmitted by the concave surface and the convex surface of the drum roller 2. The inner gear sleeve 3 is provided with teeth that match the external gear spline 6. The tooth shape of the outer surface of the external gear spline 6 matches the tooth shape of the inner surface of the internal gear spline 7. The end of the internal gear spline 7 away from the external gear spline 6 is connected to the cross shaft type universal coupling 8.

[0026] The spring buffer structure 10 is connected to the bracket body 12, the bottom of the spring buffer structure 10 is connected to the slider, and the external spline 6 is connected to the slider through the bearing seat. Figure 5The spring buffer structure 10 includes a buffer spring 101, a buffer rod 102, an adjustment nut 9, a limit seat 103, and a limit seat 2 104. The top of the buffer spring 101 is connected to the limit seat 103, the bottom of the spring is connected to the limit seat 2 104, the limit seat 2 104 is fixedly connected to the bracket body 12, the top of the buffer rod 102 is threadedly connected to the adjustment nut 9, and the buffer rod 102 passes through the limit seat 103, the buffer spring 101, the limit seat 2 104 and is fixedly connected to the slider. The bracket plays the role of positioning, adjustment, shock absorption, and buffering. The same bracket is connected to four rotating shafts 14, and the slider includes a slider 11 arranged on the upper part of the bracket body 12 and a slider 2 13 arranged in the middle part of the bracket body 12. The slider 11 is connected to the upper rotating shaft 14, and the slider 2 13 is connected to the lower rotating shaft 14. The height of the rotating shaft 14 is adjusted by adjusting the nut 9. The slider 2 13 and the slider 11 are both connected to the bearing seat of the rotating shaft 14.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Through the above specific implementations, those skilled in the art can easily implement the utility model. However, it should be understood that the utility model is not limited to the above specific implementations. On the basis of the disclosed implementations, those skilled in the art can arbitrarily combine different technical features to achieve different technical solutions.

Claims

1. A stable transmission device for a horizontal rolling mill, characterized in that: It includes an external gear flat sleeve, a drum roller, an internal gear sleeve, an external gear spline, an internal gear spline, a bracket body, a slider, and a spring buffer structure; the external gear flat sleeve is connected to the internal gear sleeve through the drum roller, a push rod is fixedly connected to the end of the external gear flat sleeve, a disc spring is provided between the push rod and the internal gear sleeve, the internal part of the internal gear sleeve is sleeved with an external gear spline, and the external part of the external gear spline is sleeved with an internal gear spline; the spring buffer structure is connected to the bracket body, the bottom of the spring buffer structure is connected to the slider, and the external gear spline is connected to the slider through a bearing seat.

2. A stable transmission device for a horizontal rolling mill according to claim 1, characterized in that: The spring buffer structure includes a buffer spring, a buffer rod, an adjusting nut, a limit seat 1, and a limit seat 2. The top of the buffer spring is connected to the limit seat 1, the bottom of the spring is connected to the limit seat 2, the limit seat 2 is fixedly connected to the bracket body, the top of the buffer rod is threadedly connected to the adjusting nut, and the buffer rod passes through the limit seat 1, the buffer spring, the limit seat 2 and is fixedly connected to the slider.

3. A stable transmission device for a horizontal rolling mill according to claim 1, characterized in that: The inner part of the inner gear sleeve is provided with teeth matching with the outer gear splines.

4. A stable transmission device for a horizontal rolling mill according to claim 1, characterized in that: The maximum angle between the central axes of the outer gear flat sleeve and the inner gear sleeve under load is 5°.

5. A stable transmission device for a horizontal rolling mill according to claim 1, characterized in that: One end of the inner gear sleeve is provided with a positioning hole, and the other end is connected with the outer gear flat sleeve.

6. A stable transmission device for a horizontal rolling mill according to claim 1, characterized in that: The outer portion of the inner gear sleeve is connected to the bearing seat.

7. A stable transmission device for a horizontal rolling mill according to claim 1, characterized in that: One end of the internal tooth spline away from the external tooth spline is connected to a cross-shaft universal coupling.

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