A crankshaft bearing thrust device for a steel rolling cold shearing machine

Abstract

The application discloses a kind of rolling steel cold shearing machine crankshaft bushing thrust device, including thrust bush, adjusting frame and end cover;End cover side is opened with the adjusting frame fixed groove matched with adjusting frame, adjusting frame fixed groove is respectively opened with the second through hole and third through hole of penetrating end cover;Adjusting frame side is opened with the bushing fixed groove matched with thrust bush, bushing fixed groove is opened with the first through of penetrating adjusting frame and with third through hole position matched, adjusting frame is opened with the adjusting frame fixed hole of being located the opposite side of bushing fixed groove and with second through hole position matched;Thrust bush one side is opened with the bushing fixed hole matched with first through hole, third through hole position, the other side is opened with oil return groove;Bushing connecting wire passes through third through hole, first through hole and is fixed with bushing fixed hole, middle adjusting jack screw passes through second through hole and is fixed with adjusting frame fixed hole, by adjusting middle adjusting jack screw can adjust thrust bush position.The application can effectively protect crankshaft bushing, prolong service life, and have very application prospect.

Description

Technical Field

[0001] This invention relates to the field of metallurgical machinery and equipment technology, and to a crankshaft bearing thrust-resistant device for a steel rolling cold shearing machine, particularly to a crankshaft bearing thrust-resistant device for extending the service life of crankshaft bearings in steel rolling cold shearing equipment. Background Technology

[0002] Currently, cold shearing machines in the steel industry are key equipment in the later stages of the rolling mill system, affecting the dimensions and cut appearance quality of products. During operation, the crankshaft bearings of the cold shearing machine are prone to wear on the crankshaft end face due to the long-term axial force after shearing. Once the wear exceeds a certain value, the cold shearing equipment needs to replace the bearings. Replacing the bearings requires disassembling the equipment, requiring at least 7 days of downtime, 18 people working 24 hours a day, and demanding high precision in equipment assembly and adjustment, necessitating significant manpower and resources.

[0003] Therefore, developing a device that can effectively reduce the axial stress on the crankshaft bearings and thus extend their service life is of great practical significance. Summary of the Invention

[0004] Due to the aforementioned deficiencies in the existing technology, the present invention provides a device that can effectively reduce the axial force on the crankshaft bearing and thus extend its service life, in order to solve the problem of short service life of crankshaft bearings in existing cold shear machines in the steel industry, which affects the working efficiency of cold shear machines in the industry.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A thrust bearing device for a cold shearing mill crankshaft includes a thrust bearing, an adjusting frame, and an end cap.

[0007] One side of the end cap has an adjustment frame fixing groove that matches the adjustment frame, and the adjustment frame fixing groove has a second through hole and a third through hole that penetrate the end cap.

[0008] The adjusting frame has a bearing fixing groove on one side that matches the thrust bearing. The bearing fixing groove has a first through hole that penetrates the adjusting frame and the first through hole matches the third through hole. The adjusting frame also has an adjusting frame fixing hole located on the opposite side of the bearing fixing groove and the adjusting frame fixing hole matches the second through hole.

[0009] The thrust bearing has a bearing fixing hole on one side that matches the positions of the first through hole and the third through hole, and an oil return groove is opened on the side of the thrust bearing opposite to the bearing fixing hole.

[0010] The bearing connecting screw passes through the third through hole and the first through hole in sequence and is then fixed on the bearing fixing hole. The intermediate adjusting screw passes through the second through hole and is fixed on the adjusting bracket fixing hole, thus completing the fixing of the thrust bearing, adjusting bracket and end cap. The position of the thrust bearing can be adjusted by adjusting the intermediate adjusting screw.

[0011] The crankshaft bearing thrust device of the present invention for a cold shearing machine for rolling mills has a simple overall design and low cost. The bearing design adopts the concept of shaft end thrust, and through the high pressure formed by the bearing during operation, an oil film is formed, thereby reducing the axial force on the cold shearing machine, effectively protecting the crankshaft bearing, greatly extending the service life of the crankshaft bearing, improving the efficiency of the cold shearing machine, and reducing maintenance costs. The device of the present invention can greatly optimize the performance of the cold shearing machine for rolling mills, and it can be easily and widely used to retrofit existing cold shearing machines for rolling mills, showing great application prospects.

[0012] As a preferred technical solution:

[0013] As described above, the crankshaft bearing thrust device for a steel rolling cold shearing machine has an end cap fixing hole on its outer side, through which the end cap can be fixed to the cold shearing equipment. Of course, it can also be fixed to other equipment as needed.

[0014] As described above, a thrust-resistant device for a crankshaft bearing of a cold shearing machine for steel rolling mills is provided, wherein the thrust bearing is an annular plate structure; the bearing fixing hole and the adjusting bracket fixing hole are blind holes with internal threads. Of course, the scope of protection of this invention is not limited to this; only one feasible technical solution is given here. A through-hole structure design can also achieve fixation, but the through-hole design is prone to misoperation, and waste materials can easily enter the through-hole during operation, causing unnecessary problems.

[0015] As described above, in a steel rolling cold shearing machine crankshaft bearing thrust device, the adjusting frame is a circular plate structure;

[0016] The bearing fixing groove is coaxial with the adjusting frame;

[0017] The fixing hole of the adjustment frame is coaxial with the central axis of the adjustment frame;

[0018] There are multiple first through holes, which are arranged circumferentially in the bearing fixing groove and their opening direction is parallel to the central axis of the adjusting frame.

[0019] As described above, in a steel rolling cold shearing machine crankshaft bearing thrust device, the end cover is circular and the adjusting frame fixing groove is coaxial with the end cover;

[0020] The second through hole is located at the center of the end cap, and its opening direction is parallel to the central axis of the end cap;

[0021] There are multiple third through holes, which are arranged circumferentially within the fixing groove of the adjusting frame, and their opening direction is parallel to the central axis of the end cover. That is, the adjusting frame, end cover, and thrust bearing are coaxial and symmetrically designed. Of course, the scope of protection of this invention is not limited to this. Those skilled in the art can set the specific structural arrangement of the adjusting frame, end cover, and thrust bearing according to actual needs. This is only one feasible technical solution.

[0022] As described above, in a crankshaft bearing thrust device for a cold shearing rolling mill, the walls of the first through hole, the second through hole, and the third through hole are smooth, meaning that no tapping is required inside the holes.

[0023] As described above, in a crankshaft bearing thrust-resistant device for a cold shearing mill, the oil return groove is X-shaped, and there are multiple X-shaped grooves arranged circumferentially on the thrust bearing. The scope of protection of this invention is not limited thereto; those skilled in the art can design the specific oil return grooves according to actual conditions.

[0024] As described above, in the crankshaft bearing thrust device of a steel rolling cold shearing machine, the depth of the oil return groove is 2mm.

[0025] As described above, in a crankshaft bearing thrust device for a cold shearing rolling mill, the width of the bearing fixing groove is 0.5 mm larger than the width of the thrust bearing. The depth of the oil return groove and other specific parameters are not limited to this; this is merely one feasible technical solution, and those skilled in the art can reasonably set the specific parameters according to actual needs.

[0026] The above invention has the following advantages or beneficial effects:

[0027] This invention has great application prospects.

[0028] The thrust bearing device for the crankshaft bearing of the cold shearing machine of the present invention has a simple overall design, is easy to process, has low cost, and is easy to operate (the position of the thrust bearing can be adjusted by adjusting the middle adjusting screw) and has high adjustment accuracy. The bearing design adopts the design concept of shaft end thrust. During the operation of the bearing end, the high pressure forms an oil film, thereby reducing the axial force of the cold shearing machine, thus effectively protecting the crankshaft bearing, greatly extending the service life of the crankshaft bearing, improving the efficiency of the cold shearing machine, and reducing maintenance costs. The application of the device of the present invention can greatly optimize the performance of the cold shearing machine of the rolling mill, and it can be easily and widely used to retrofit existing cold shearing machines of the rolling mill, which has great application prospects. Attached Figure Description

[0029] The invention, its features, shape, and advantages will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference numerals denote like parts throughout the drawings. The drawings are not drawn to scale; their focus is on illustrating the gist of the invention.

[0030] Figure 1 This is a three-dimensional structural schematic diagram of the crankshaft bearing thrust device of the cold shearing machine for steel rolling mill according to the present invention;

[0031] Figure 2 This is a schematic diagram of the assembly cross section of the crankshaft bearing thrust device of the cold shearing machine for rolling mills according to the present invention;

[0032] Figures 3-5 Schematic diagrams of thrust bearings from different perspectives;

[0033] Figures 6-8 These are schematic diagrams of the adjustment frame from different perspectives;

[0034] Figures 9-11 These are schematic diagrams of the end cap from different perspectives;

[0035] Among them, 1-thrust bearing, 1.1-bearing fixing hole, 1.2-oil return groove, 2-adjusting bracket, 2.1-bearing fixing groove, 2.2-first through hole, 2.3-adjusting bracket fixing hole, 3-end cover, 3.1-adjusting bracket fixing groove, 3.2-second through hole, 3.3-third through hole, 3.4-end cover fixing hole, 4-intermediate adjusting screw, 5-bearing connecting screw. Detailed Implementation

[0036] The structure of the present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0037] Example 1

[0038] A thrust-resistant device for the crankshaft bearing of a steel rolling cold shearing machine, such as Figures 1-2 As shown, it includes a thrust bearing 1, an adjusting bracket 2, and an end cap 3;

[0039] End cap 3 Figures 9-11 As shown, the device is circular in shape. On one side, there is an adjustment frame fixing groove 3.1 that matches the adjustment frame 2 and is coaxial with the end cover 3. The adjustment frame fixing groove 3.1 has a second through hole 3.2 (with smooth hole wall) and a third through hole 3.3 (with smooth hole wall) that penetrate the end cover 3. The second through hole 3.2 is located at the center of the end cover and its opening direction is parallel to the central axis of the end cover 3. There are multiple third through holes 3.3, which are arranged circumferentially in the adjustment frame fixing groove 3.1 and their opening direction is parallel to the central axis of the end cover 3. The outer side of the end cover 3 is provided with an end cover fixing hole 3.4, through which the end cover can be fixed on the cold shearing equipment.

[0040] Adjustment bracket 2 Figures 6-8As shown, it is a circular plate structure with a bearing fixing groove 2.1 on one side that matches the thrust bearing 1 and is coaxial with the adjusting frame 2. Multiple first through holes 2.2 (with smooth walls) are opened in the bearing fixing groove 2.1, which penetrate the adjusting frame 2 and are arranged circumferentially in the bearing fixing groove 2.2 (with the opening direction parallel to the central axis of the adjusting frame 2). The first through holes 2.2 and the third through holes 3.3 are matched in position. The adjusting frame 2 also has an adjusting frame fixing hole 2.3 (a blind hole structure with internal threads) that is coaxial with the central axis of the adjusting frame 2. The adjusting frame fixing hole 2.3 is located on the opposite side of the bearing fixing groove 2.1, and the adjusting frame fixing hole 2.3 is matched in position with the second through hole 2.2.

[0041] Thrust bearing 1 Figures 3-5 As shown, it is an annular plate structure with a bearing fixing hole 1.1 (a blind hole structure with internal threads) on one side that matches the position of the first through hole 2.2 and the third through hole 3.3. On the opposite side of the thrust bearing 1 and the bearing fixing hole 1.1, there are multiple X-shaped oil return grooves 1.2 arranged circumferentially on the thrust bearing.

[0042] The bearing connecting screw 5 passes through the third through hole 3.3 and the first through hole 2.2 in sequence and is fixed on the bearing fixing hole 1.1. The intermediate adjusting screw 4 passes through the second through hole 3.2 and is fixed on the adjusting bracket fixing hole 2.3, thereby completing the fixing of the thrust bearing 1, the adjusting bracket 2 and the end cover 3. The position of the thrust bearing 1 can be adjusted by adjusting the intermediate adjusting screw 4.

[0043] The machining and assembly steps of the crankshaft bearing thrust device of the above-mentioned cold shearing rolling mill are as follows:

[0044] Step 1: Fabrication of the thrust bearing

[0045] The thrust bearing is made of 8mm copper plate and is ring-shaped. Figures 3-5 During manufacturing, drilling and tapping are evenly distributed on one side, while an oil return groove with a 2mm depth is machined on the other side using a milling cutter.

[0046] Step 2: Making the Adjustment Frame

[0047] The manufacturing of the adjustment frame is as follows Figures 6-8 As shown, first use a lathe tool to machine a circular material, then mill an annular groove (i.e., the bearing fixing groove). The groove should be 0.5mm larger than the thrust bearing. Drill 6 holes evenly in the middle of the groove (i.e., the first through hole) to correspond to the thrust bearing (these are through holes and no tapping is required). The middle of the other side is the fixing hole for the adjustment bracket, which needs to be drilled and tapped.

[0048] Step 3: Making the end caps

[0049] The manufacturing method of end caps is similar to that of general flange caps, such as... Figures 9-11As shown, the blank is machined into different steps and internal holes by turning and milling, and then drilled. The outermost ring of holes (i.e., end cap fixing holes) is machined in conjunction with the cold shearing equipment, so the machining dimensions depend on the equipment. The size of the middle ring of holes (i.e., the third through hole) corresponds to the same size as the adjustment frame, and the center hole (i.e., the second through hole) corresponds to the adjustment frame.

[0050] Step 4: Assembly and Adjustment

[0051] like Figure 2 As shown, first assemble the end cover 3 with the adjusting bracket 2, which is achieved by connecting the intermediate adjusting screw 4. Then connect the thrust bearing 1 with the adjusting bracket 2, which is achieved by connecting the bearing with the bearing connecting screw 5. When in use, adjust the gap between the bearing and the crankshaft by loosening the bearing connecting screw 5 and adjusting the intermediate adjusting screw 4. After adjustment, tighten the bearing with the locking nut of the bearing connecting screw 5.

[0052] In summary, the crankshaft bearing thrust device of the cold shearing machine of the present invention has a simple overall design, is easy to process, has low cost, and is easy to operate (the position of the thrust bearing can be adjusted by adjusting the intermediate adjusting screw) and has high adjustment accuracy. The bearing design adopts the design concept of shaft end thrust, and the oil film formed by the high pressure during the operation of the end bearing reduces the axial force of the cold shearing machine, thereby effectively protecting the crankshaft bearing, greatly extending the service life of the crankshaft bearing, improving the efficiency of the cold shearing machine, and reducing maintenance costs. The application of the device of the present invention can greatly optimize the performance of the cold shearing machine of the steel rolling mill, and it can be easily and widely used to retrofit existing cold shearing machines of the steel rolling mill, which has great application prospects.

[0053] Those skilled in the art should understand that variations can be implemented by combining existing technology with the above embodiments, which will not be elaborated here. Such variations do not affect the essence of the present invention, and will not be elaborated here either.

[0054] The preferred embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and the devices and structures not described in detail should be understood as being implemented in a conventional manner in the art. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention using the methods and techniques disclosed above, or modify them into equivalent embodiments with equivalent changes, without departing from the scope of the present invention. This does not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the present invention's technical solutions still fall within the protection scope of the present invention.

Claims

1. A thrust-resistant device for crankshaft bearings in a steel rolling cold shearing machine, characterized in that: This includes thrust bearings, adjusting brackets, and end caps; One side of the end cap has an adjustment frame fixing groove that matches the adjustment frame, and the adjustment frame fixing groove has a second through hole and a third through hole that penetrate the end cap. The adjusting frame has a bearing fixing groove on one side that matches the thrust bearing. A first through hole is formed in the bearing fixing groove, and the first through hole and a third through hole are aligned in position. The adjusting frame also has an adjusting frame fixing hole located on the opposite side of the bearing fixing groove, and the adjusting frame fixing hole is aligned in position with a second through hole. The adjusting frame is a circular plate structure. The bearing fixing groove and the adjusting frame are coaxial. The fixing hole of the adjusting frame is coaxial with the central axis of the adjusting frame; there are multiple first through holes, which are arranged circumferentially in the bearing fixing groove and their opening direction is parallel to the central axis of the adjusting frame; The thrust bearing has a bearing fixing hole on one side that matches the positions of the first through hole and the third through hole, and an oil return groove is opened on the side of the thrust bearing opposite to the bearing fixing hole. The bearing connecting screw passes through the third through hole and the first through hole in sequence and is then fixed to the bearing fixing hole. The intermediate adjusting screw passes through the second through hole and is fixed to the adjusting bracket fixing hole, thus completing the fixing of the thrust bearing, adjusting bracket and end cap. The position of the thrust bearing can be adjusted by adjusting the intermediate adjusting screw. The thrust bearing is an annular plate structure; the bearing fixing hole and the adjusting bracket fixing hole are blind holes with internal threads.

2. The thrust-resistant device for crankshaft bearings of a cold shearing mill according to claim 1, characterized in that, The end cap is provided with an end cap fixing hole on the outside, through which the end cap can be fixed to the cold shearing equipment.

3. The thrust-resistant device for crankshaft bearings of a cold shearing rolling mill according to claim 1, characterized in that, The end cap is circular and the adjusting bracket fixing groove is coaxial with the end cap; The second through hole is located at the center of the end cap, and its opening direction is parallel to the central axis of the end cap; There are multiple third through holes, which are arranged circumferentially in the fixing groove of the adjustment frame and their opening direction is parallel to the central axis of the end cover.

4. The thrust-resistant device for crankshaft bearings of a cold shearing mill according to claim 3, characterized in that, The walls of the first through hole, the second through hole, and the third through hole are smooth.

5. The thrust-resistant device for crankshaft bearings of a cold shearing rolling mill according to claim 1, characterized in that, The oil return groove is X-shaped and there are multiple of them, which are arranged circumferentially on the thrust bearing.

6. The thrust-resistant device for crankshaft bearings of a cold shearing rolling mill according to claim 5, characterized in that, The depth of the oil return groove is 2mm.

7. The thrust-resistant device for crankshaft bearings of a cold shearing mill according to claim 1, characterized in that, The width of the bearing fixing groove is 0.5 mm larger than the width of the thrust bearing.

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