A type of universal joint with high stability for profiles

Abstract

This utility model specifically relates to a highly stable universal joint for profiled materials, belonging to the field of profiled material manufacturing technology. It includes a first universal joint fork, a second universal joint fork, a sliding mechanism located at the upper end of the second universal joint fork, and a connecting assembly located at the lower end of the second universal joint fork. The connecting assembly includes a first flange, a second flange, and a shaped connecting key. The shaped connecting key is inserted between the first flange and the second flange and is installed between the first flange and the second flange by fastening bolts. This utility model forms a mechanical anti-dislodgement mechanism through the I-shaped connecting key. Even if the fixing bolt breaks due to extreme conditions, the shaped connecting key will not be thrown out, completely eliminating the risk of chain damage to equipment caused by this, reducing equipment maintenance costs, eliminating the need for downtime maintenance, reducing equipment failure rate, and lowering the labor intensity of maintenance personnel.

Description

Technical Field

[0001] This utility model relates to the field of profile manufacturing technology, specifically a universal joint with high stability for profiles. Background Technology

[0002] A straightening machine is a device used to straighten irregularly shaped metal profiles, bars, pipes, wires, etc. The straightening machine uses straightening rollers to compress the bar or other material, changing its straightness. Generally, there are two rows of straightening rollers, though the number varies. There are also two-roll straightening machines that rely on the angle change of the two rollers (a hyperbolic roller with a concave center) to straighten materials of different diameters. The main types include pressure straightening machines, balance roller straightening machines, shoe roller straightening machines, rotary reverse bending straightening machines, etc. Straightening machines are generally equipped with universal couplings.

[0003] In a straightening machine, the flat key inside the universal coupling is usually fixed by two M20 socket head cap bolts. However, due to the long service life of the universal shaft of the straightening machine, the keyways are worn. Therefore, when the straightening roller bites the steel, the impact force plus the wear of the keyways can easily cause the flat key to wobble slightly, which may cause the fixing bolts to break and the flat key to be thrown out. After the flat key is thrown out, it is very easy to damage the axial adjustment reducer below, causing the machine to stop for repair and equipment damage. Utility Model Content

[0004] The purpose of this utility model is to provide a highly stable universal joint for profiles, to solve the problem mentioned in the background art. Due to the long service life of the universal joint of the large-scale straightening machine, the keyways are worn. Therefore, when the straightening roller bites the steel, the impact force of the keyway plus the wear of the keyway can easily cause the key to wobble slightly, which may lead to the breaking of the fixing bolt and the key being thrown out. After the key is thrown out, it is very likely to damage the axial adjustment reducer below, causing downtime for emergency repairs and equipment damage. This solution uses an integrally molded I-shaped connecting key to form a mechanical anti-dislodgement mechanism. Even if the fixing bolt breaks due to extreme conditions, the connecting key will not be thrown out, completely eliminating the risk of chain damage to the equipment caused by this, reducing the maintenance cost of the equipment, eliminating the need for downtime for maintenance, reducing the equipment failure rate and the labor intensity of maintenance personnel.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a universal joint with high stability for profiles, comprising a first universal joint fork, a second universal joint fork, a sliding mechanism disposed at the upper end of the second universal joint fork, and a connecting assembly disposed at the lower end of the second universal joint fork. The connecting assembly comprises a first flange, a second flange, and a shaped connecting key. The shaped connecting key is inserted between the first flange and the second flange, and the shaped connecting key is installed between the first flange and the second flange by fastening bolts.

[0006] In a preferred embodiment: the irregular connecting key is I-shaped, the irregular connecting key includes a flat key and a stop, the number of stops is two, distributed at both ends of the flat key, and the two stops are integrally formed with the flat key.

[0007] In a preferred embodiment: the sliding mechanism includes a spline shaft and a key sleeve fixedly connected to the upper end of the second universal joint fork, the spline shaft and the key sleeve being slidably connected, and the key sleeve being provided with an oiling component.

[0008] In a preferred embodiment: the oiling assembly includes an oil cylinder, an oiling cavity, an oiling port, and a sealing element. The oil cylinder, which has a hollow cavity, is fixedly connected to the outer wall of the key sleeve. Two symmetrically distributed oiling cavities are opened on the oil cylinder and the wall of the key sleeve. Several oiling ports are opened on the top of the key cavity on the wall of the key sleeve, which is used for the movement of the spline shaft. The oiling ports are connected to the oiling cavities. A sealing element is provided at one end of the oiling cavity, and the sealing element is located inside the oil cylinder.

[0009] In a preferred embodiment, the position of the oil inlet corresponds to the position of the keyway on the spline shaft.

[0010] In a preferred embodiment: the sealing element includes a sealing plate, an adjusting stud, and a handle. The sealing plate is slidably disposed on the wall of the oil cylinder. The sealing plate is provided with sealing rubber on its wall. An adjusting stud is fixedly connected to the upper end of the sealing plate. The adjusting stud is threadedly connected to the upper wall of the oil cylinder. A handle is fixedly connected to the top end of the adjusting stud.

[0011] In a preferred embodiment: an oil pipe is fixedly connected to one side wall of the oil cylinder, and a rubber plug is inserted into the upper end of the oil pipe.

[0012] In a preferred embodiment: the rubber stopper is T-shaped, and the diameter of the upper end of the rubber stopper is larger than the outer diameter of the oil pipe.

[0013] In a preferred embodiment, the first universal joint fork and the second universal joint fork are hinged together by a cross shaft.

[0014] Compared with the prior art, the beneficial effects of this utility model are: By using an integrally molded I-shaped connecting key, the stop structures at both ends form a mechanical anti-disengagement mechanism. Even if the fixing bolt breaks due to extreme circumstances, the connecting key will not be thrown out, completely eliminating the risk of chain damage to the equipment caused by this, reducing equipment maintenance costs, eliminating the need for downtime maintenance, reducing equipment failure rate and the labor intensity of maintenance personnel; and through the integrated oiling component, it can achieve regular and continuous active lubrication of the spline pair, effectively preventing rapid wear and jamming caused by poor lubrication, greatly extending the service life of the universal joint, especially the sliding parts, and reducing maintenance frequency and costs. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of the universal joint of this utility model; Figure 2 This is a three-dimensional cross-sectional view of the universal joint of this utility model; Figure 3 This is a schematic diagram of the irregularly shaped connecting key in this utility model; Figure 4 This is a top cross-sectional view of the oil cylinder and key sleeve in this utility model; Figure 5 This is a cross-sectional connection diagram of the first flange, the second flange, the irregular connecting key, and the fastening bolts in this utility model.

[0016] In the diagram: 1. First universal joint fork; 2. Second universal joint fork; 3. First flange; 4. Second flange; 5. Irregular connecting key; 50. Flat key; 51. Stop; 6. Fastening bolt; 7. Splined shaft; 8. Key sleeve; 9. Oil cylinder; 10. Oil filling chamber; 11. Oil filling port; 12. Sealing plate; 13. Adjusting stud; 14. Handle; 15. Oil pipe; 16. Rubber plug; 17. Cross shaft. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1 One embodiment provided by this utility model: A high-stability universal joint for profiled profiles includes a first universal joint fork 1, a second universal joint fork 2, a lubricated sliding mechanism located at the upper end of the second universal joint fork 2, and a connecting assembly located at the lower end of the second universal joint fork 2. The first universal joint fork 1 is rotatably connected to two ends of a cross shaft 17, and the second universal joint fork 2 is rotatably connected to the other two ends of the cross shaft 17, allowing the first universal joint fork 1 and the second universal joint fork 2 to rotate relative to each other. The connecting assembly includes a first flange 3, a second flange 4, and a shaped connecting key 5. The shaped connecting key 5 is inserted between the first flange 3 and the second flange 4, and the shaped connecting key 5... Fastening bolts 6 are installed between the first flange 3 and the second flange 4. The first flange 3 and the second flange 4 are also connected by several fastening bolts 6. Both ends of the multiple fastening bolts 6 are threaded with fastening nuts. The lower end of the first flange 3 is welded to the first universal joint fork 1. In use, the I-shaped connecting key 5 is inserted into the corresponding keyway of the first flange 3 and the second flange 4. Then, several high-strength fastening bolts 6 are passed through the stop 51 and the flange and locked with fastening nuts. This structure makes the I-shaped connecting key 5 more reliably fixed in both the axial and radial directions, and increases the impact resistance.

[0019] Please see Figure 1 , Figure 3 and Figure 5 In this embodiment, the irregular connecting key 5 is I-shaped. The irregular connecting key 5 includes a flat key 50 and two stops 51. The two stops 51 are distributed at both ends of the flat key 50 and are integrally formed with the flat key 50. The irregular connecting key 5 is designed as an "I" shape, which is integrally formed by a flat key 50 in the middle and two stops 51 at both ends. The stops 51 at both ends are like "clamps" and can firmly lock the flange from both sides, fundamentally eliminating the possibility that the flat key 50 will be axially thrown out due to the breakage of the fastening bolt 6.

[0020] Please see Figure 1 In this embodiment, the sliding mechanism includes a spline shaft 7 and a key sleeve 8 that are fixedly connected to the upper end of the second universal joint fork 2. The spline shaft 7 and the key sleeve 8 are slidably connected, and the key sleeve 8 is provided with an oiling component.

[0021] Please see Figure 1 and Figure 2 In this embodiment, the oil injection assembly includes an oil cylinder 9, an oil injection cavity 10, an oil injection port 11, and a sealing element. The oil cylinder 9, which has a hollow cavity, is fixedly connected to the outer wall of the key sleeve 8. Two symmetrically distributed oil injection cavities 10 are opened on the walls of the oil cylinder 9 and the key sleeve 8. Several oil injection ports 11 are opened on the top of the key cavity on the wall of the key sleeve 8, which is used for the movement of the spline shaft 7. The oil injection ports 11 are connected to the oil injection cavities 10. A sealing element is provided at one end of the oil injection cavity 10, and the sealing element is located inside the oil cylinder 9.

[0022] Please see Figure 2and Figure 4 In this embodiment, the position of the oil inlet 11 corresponds to the position of the keyway on the spline shaft 7.

[0023] Please see Figure 2 and Figure 4 In this embodiment, the sealing element includes a sealing plate 12, an adjusting stud 13, and a handle 14. The sealing plate 12 is slidably provided on the wall of the oil cylinder 9. The wall of the sealing plate 12 is provided with sealing rubber. The upper end of the sealing plate 12 is fixedly connected to the adjusting stud 13. The adjusting stud 13 is threadedly connected to the upper end wall of the oil cylinder 9. The top end of the adjusting stud 13 is fixedly connected to the handle 14. When it is not necessary to lubricate the spline shaft 7, the adjusting stud 13 is rotated in the opposite direction, causing the sealing plate 12 to move down, separating the oil injection chamber 10 from the inner cavity of the oil cylinder 9, and no more oil is injected into the oil injection chamber 10.

[0024] Please see Figure 2 In this embodiment, an oil pipe 15 is fixedly connected to one side wall of the oil cylinder 9. A rubber plug 16 is inserted into the upper end of the oil pipe 15. The rubber plug 16 is T-shaped, and the diameter of the upper end of the rubber plug 16 is larger than the outer diameter of the oil pipe 15. The oil pipe 15 is used to add lubricating oil. After the oil is added, it is sealed tightly with the T-shaped rubber plug 16 to prevent contamination.

[0025] Please see Figure 1 In this embodiment, the first universal joint fork 1 and the second universal joint fork 2 are hinged together by a cross shaft 17.

[0026] Working principle: When the universal joint is working, the torque is reliably transmitted through the I-shaped connecting key 5 of the connecting component. The impact load is effectively resisted by the I-shaped structure, preventing the key from loosening. At the same time, the operator can periodically add lubricating oil to the oil cylinder 9 through the oil filling pipe 15, and rotate the adjusting stud 13 by rotating the handle 14, so that the sealing plate 12 moves up and down to open and close the oil filling chamber 10. When the spline shaft 7 needs to be lubricated, the adjusting stud 13 can be rotated forward, which will drive the sealing plate 12 to move upward. The oil filling chamber 10 and the inner cavity of the oil cylinder 9 are connected, and the lubricating oil flows into the key sleeve 8 through the oil filling chamber 10 and the oil filling port 11, thereby lubricating the connection between the spline shaft 7 and the key sleeve 8, ensuring smooth sliding and reducing wear, avoiding abnormal wear of the spline shaft 7 and spline sleeve 8 caused by the radial runout of the spline shaft 7, and increasing the service life of the spline shaft 7.

[0027] It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above. It should be noted that parts not described in this utility model are identical to or can be implemented using existing technology, and that this utility model can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A universal joint with high stability for profiled materials, comprising a first universal joint fork (1), a second universal joint fork (2), a sliding mechanism disposed at the upper end of the second universal joint fork (2), and a connecting assembly disposed at the lower end of the second universal joint fork (2), characterized in that: The connecting assembly includes a first flange (3), a second flange (4), and a special-shaped connecting key (5). The special-shaped connecting key (5) is inserted between the first flange (3) and the second flange (4). The special-shaped connecting key (5) is installed between the first flange (3) and the second flange (4) by fastening bolts (6). The irregular connecting key (5) is I-shaped. The irregular connecting key (5) includes a flat key (50) and a stop (51). There are two stops (51), which are distributed at both ends of the flat key (50), and the two stops (51) are integrally formed with the flat key (50).

2. The universal joint with high stability for a profiled bar according to claim 1, characterized in that: The sliding mechanism includes a spline shaft (7) and a key sleeve (8) fixedly connected to the upper end of the second universal joint fork (2). The spline shaft (7) and the key sleeve (8) are slidably connected, and the key sleeve (8) is provided with an oil injection component.

3. The universal joint with high stability for a profiled bar according to claim 2, characterized in that: The oil injection assembly includes an oil cylinder (9), an oil injection cavity (10), an oil injection port (11), and a sealing element. The outer wall of the key sleeve (8) is fixedly connected to the oil cylinder (9), which has a hollow cavity. The oil cylinder (9) and the key sleeve (8) have two symmetrically distributed oil injection cavities (10). The key sleeve (8) has several oil injection ports (11) at the top of the key cavity for the spline shaft (7) to move. The oil injection ports (11) are connected to the oil injection cavities (10). One end of the oil injection cavity (10) is provided with a sealing element, which is located inside the oil cylinder (9).

4. A universal joint with high stability for profiled materials according to claim 3, characterized in that: The position of the oil inlet (11) corresponds to the position of the keyway on the spline shaft (7).

5. A universal joint with high stability for profiled materials according to claim 3, characterized in that: The sealing element includes a sealing plate (12), an adjusting stud (13), and a handle (14). The sealing plate (12) is slidably provided on the wall of the oil cylinder (9). The sealing plate (12) is provided with sealing rubber on its wall. The upper end of the sealing plate (12) is fixedly connected to the adjusting stud (13). The adjusting stud (13) is threadedly connected to the upper end wall of the oil cylinder (9). The top end of the adjusting stud (13) is fixedly connected to the handle (14).

6. A universal joint with high stability for profiled materials according to claim 3, characterized in that: An oil pipe (15) is fixedly connected to one side wall of the oil cylinder (9), and a rubber plug (16) is inserted into the upper end of the oil pipe (15).

7. A universal joint with high stability for profiled materials according to claim 6, characterized in that: The rubber stopper (16) is T-shaped, and the diameter of the upper end of the rubber stopper (16) is larger than the outer diameter of the oil pipe (15).

8. A universal joint with high stability for profiled materials according to claim 1, characterized in that: The first universal joint fork (1) and the second universal joint fork (2) are hinged together by a cross shaft (17).

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