Connecting method adopting cylindrical split

Abstract

The invention relates to the technical field of shaft body connecting methods, solves the problems of high assembly complexity and insufficient connecting strength and stability in the prior art, and discloses a connecting method adopting a cylindrical cleave, which comprises the following steps of: 1, forming a mounting hole in a basic workpiece, and communicating the mounting hole with a connecting shaft hole; secondly, a tangential groove is formed in the outer wall of the connecting shaft; thirdly, the connecting shaft penetrates into the connecting shaft hole, and the tangential groove enters the mounting hole; step 4, inserting a cylindrical split into the mounting hole; the cylinder is split to be provided with an inclined face which abuts against the bottom of the tangential groove. And fifthly, a limiting piece used for limiting the cylinder split to be separated from the mounting hole is placed in. According to the invention, a simple and effective connecting mode can be provided, and the stability and reliability of the connecting shaft are improved.

Description

Technical Field

[0001] The present application relates to the technical field of shaft connection methods, and in particular to a connection method using a cylindrical split. Background Art

[0002] In modern industrial production, the connection technology between mechanical parts is crucial, which directly affects the overall performance and service life of mechanical equipment. Traditional commonly used connection methods include threaded connection, key connection, welding, etc. Although these traditional connection methods have their own characteristics, they generally have problems such as complex assembly, high cost or difficulty in standardization in actual applications.

[0003] There are many methods being tried, for example: optimizing the design of bolt connection structure to enhance shear resistance, but this usually leads to increased processing difficulty; using interference fit to achieve a tight connection between shaft holes, this method requires extremely high assembly precision, which often limits its wide application; and using adhesives, but the long-term reliability is questionable, especially in high temperature or chemical corrosion environments.

[0004] In summary, existing mechanical connection technologies generally face problems such as high assembly complexity, insufficient connection strength and stability, difficulty in cost control, and low degree of standardization. Summary of the invention

[0005] In order to improve the defects of the prior art, such as high assembly complexity, insufficient connection strength and stability, the present application provides a connection method using cylindrical splitting.

[0006] The following technical solutions are adopted: First, A connection method using cylindrical splitting, comprising: Step 1: Open a mounting hole on the base workpiece, wherein the mounting hole is connected to the coupling hole; Step 2: forming a tangential groove on the outer wall of the connecting shaft; Step 3, insert the connecting shaft into the connecting shaft hole so that the tangential groove enters the mounting hole; Step 4, inserting a cylindrical splitter into the mounting hole; the cylindrical splitter is provided with an inclined surface, and the inclined surface abuts against the bottom of the tangential groove; Step five: insert a limiting member for limiting the cylindrical split from leaving the mounting hole.

[0007] By adopting the above technical solution, the steps are operated in sequence, firstly the mounting hole and the tangential groove are opened, then the connecting shaft is inserted and the cylindrical split is inserted, and finally the stopper is placed. Through a series of operations, a firm connection between the connecting shaft and the base workpiece is achieved. The opening of the tangential groove abuts against the inclined surface of the cylindrical split, so that the cylindrical split can effectively fix the connecting shaft in the mounting hole to prevent it from loosening or falling off. The placement of the stopper further enhances the stability of the connection. A simple and effective connection method is provided, which improves the stability and reliability of the connecting shaft.

[0008] Optionally, in step one, the center line of the mounting hole deviates from the external tangent line of the coupling hole.

[0009] Optionally, in step three, the tangential groove is inclined upward.

[0010] By adopting the above technical solution, the upwardly inclined tangential groove helps the cylindrical wedge to better abut against the bottom of the groove during the insertion process, thereby increasing the stability and firmness of the connection. In addition, this design also helps to reduce friction and wear during the connection process.

[0011] Optionally, a second screw hole is formed at the top of the cylindrical split.

[0012] Optionally, the limiting member is a combination bolt; a first screw hole is provided on the inner wall of the opening of the mounting hole; and the combination bolt and the first screw hole are threadedly connected.

[0013] By adopting the above technical solution, the threaded connection between the combined bolt and the first screw hole provides a simple and effective limiting method, which can firmly fix the cylindrical split and the connecting shaft to prevent them from loosening or falling off.

[0014] Optionally, a locking nut is threadedly connected to the combination bolt.

[0015] By adopting the above technical solution, the addition of the clamping nut further enhances the tightness of the connection, and by adjusting the tightness of the clamping nut, the connecting shaft and the cylindrical split can be accurately fixed.

[0016] Optionally, a spring washer is provided at the tail end of the combination bolt.

[0017] By adopting the above technical solution, the design of the spring washer helps to prevent the combined bolt from loosening under vibration or impact load, thereby improving the stability and durability of the connection.

[0018] Second, Optionally, an anti-wear slide plate is provided at the bottom of the tangential groove.

[0019] By adopting the above technical solution, the wear-resistant sliding plate can reduce the friction and wear between the connecting shaft and the cylindrical splitter, extend the service life of the connecting part, and also help to improve the stability and reliability of the connection.

[0020] Optionally, the mounting hole passes through the base workpiece, and a third screw hole is provided at one end of the mounting hole away from the first screw hole.

[0021] Thirdly, Optionally, the limiting member is a screw column, and a hexagonal groove is formed on the top of the screw column.

[0022] By adopting the above technical solution, the screw column is used as a limiter, and the hexagonal groove can be conveniently tightened and fixed using tools such as a wrench, thereby improving the convenience and operability of the connection.

[0023] In summary, the present application includes at least one of the following beneficial effects: 1. Improved the stability and reliability of the connection: Through a series of careful designs and step operations, a firm connection between the connecting shaft and the base workpiece is achieved, effectively preventing loosening and falling off.

[0024] 2. Extend the service life of the connector: Through designs such as anti-wear slide plates, the friction and wear during the connection process are reduced, and the durability and service life of the connector are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic cross-sectional structural diagram of the first embodiment; Figure 2 yes Figure 1 AA cross-sectional structural diagram; Figure 3 It is a schematic diagram of the front view structure of a cylindrical split; Figure 4 It is a schematic diagram of the cross-sectional structure of a cylindrical split side view; Figure 5 is a schematic cross-sectional structural diagram of the second embodiment; Figure 6 It is a cross-sectional structural schematic diagram of embodiment three.

[0026] Explanation of the accompanying drawings: 1. Basic workpiece; 11. Mounting hole; 111. First screw hole; 112. Third screw hole; 12. Coupling hole; 2. Connecting shaft; 21. Tangential groove; 3. Combination bolt; 4. Locking nut; 5. Spring washer; 6. Cylindrical split; 61. Inclined surface; 62. Second screw hole; 7. Anti-wear slide plate; 8. Screw column; 81. Hexagonal groove. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1 To Attachment Figure 6This application is described in further detail.

[0028] In the prior art, the workpiece and the shaft are fixed together. Generally, the shear resistance is enhanced by optimizing the design of the bolt connection structure, but this usually increases the difficulty of processing. Or the tight connection between the shaft holes is achieved by using interference fit. This method requires extremely high assembly accuracy, which often limits its wide application. Or there is also a method of using adhesives, but the long-term reliability is questionable, especially in high temperature or chemical corrosion environments. Therefore, in order to achieve a simpler and faster assembly process while ensuring sufficient connection strength and stability, it is convenient for large-scale production and standardized management, and reduces the overall manufacturing cost.

[0029] The present application provides a connection method using cylindrical splitting, including the following implementation methods: Embodiment 1: In this embodiment, the following parts are used to connect the basic workpiece 1 and the connecting shaft 2, including: a combination bolt 3, a locking nut 4, a spring washer 5 and a cylindrical splitter 6.

[0030] Reference Figure 1 and Figure 2 , step 1, a mounting hole 11 is opened on the base workpiece 1. The mounting hole 11 is connected to the coupling hole 12. The central axis of the mounting hole 11 is perpendicular to the central axis of the coupling hole 12 on the lateral projection plane, and there is a distance between the center line of the mounting hole 11 and the circumferential tangent line of the coupling hole 12. The upper end (i.e., the starting end) of the mounting hole 11 has a first screw hole 111. The thread crest of the first screw hole 111 is flush with or sunken with the inner wall extension surface of the mounting hole 11, so that the cylindrical split 6 can pass smoothly.

[0031] Step 2: A tangential groove 21 is formed at an appropriate position on the outer circle of the connecting shaft 2. The tangential groove 21 is a rectangular groove. The difference between the radius of the connecting shaft 2 and the distance from the bottom plane of the tangential groove 21 to the center axis of the connecting shaft 2 is the depth of the tangential groove 21. The bottom plane width of the tangential groove 21 is slightly larger than the aperture of the mounting hole 11.

[0032] Step 3: Insert the connecting shaft 2 into the connecting shaft hole 12 until the tangential groove 21 enters the corresponding position of the mounting hole 11. The tangential groove 21 is slightly inclined upward. It is worth noting that if the tangential groove 21 is inclined downward, the connecting shaft 2 may rotate during the assembly process, causing the tangential groove 21 to deviate from the predetermined position.

[0033] Reference Figures 1 to 4, step 4, insert the cylindrical split 6. The cylindrical split 6 is a cylindrical structure. The surface of the cylindrical split 6 is provided with an inclined surface 61. The end of the cylindrical split 6 that penetrates into the mounting hole 11 when the cylindrical split 6 is inserted into the mounting hole 11 is the bottom end, and the other end is the top end. The inclined surface 61 is inclined from the top end to the center axis of the cylindrical split 6 until the bottom end. The distance from the side of the bevel close to the bottom end to the center axis of the cylindrical split 6 is less than the radius of the cylindrical split 6. In this way, first, the inclined surface 61 has the largest angle, that is, it has the largest adjustment range. Due to the small bevel angle, the processing errors of the hole pitch and the outer diameter of the cylindrical split 6 will have a greater impact on the axial position of the cylindrical split 6 in the coupling hole 12. Therefore, the maximum adjustment range can ensure the contact between the inclined surface 61 and the bottom plane of the groove. Second, the inclined surface 61 has a larger plane area, so that the inclined surface 61 has a larger contact area with the bottom plane of the tangential groove 21, prevents the damage of the contact surface, and makes the connection more reliable and transmits a larger torque.

[0034] Step 5, in this embodiment, the limiting member is a combination bolt 3. The combination bolt 3 is screwed into the first screw hole 111 until the cylindrical split 6 is pushed deeper and tightened. And due to the threaded fit between the first screw hole 111 and the combination bolt 3, a self-locking effect is achieved. Thus, the movement of the cylindrical split 6 is limited. This makes the connecting shaft 2 and the basic workpiece 1 more stable when transmitting torque and vibration. Among them, the tail of the combination bolt 3 is threadedly connected to the locking nut 4.

[0035] Step 6: Rotate the locking nut 4 toward the cylindrical wedge 6 until it is pressed against the surface of the base workpiece 1.

[0036] According to the sequence of steps, the mounting hole 11 and the tangential groove 21 are first opened, the connecting shaft 2 is inserted, the cylindrical split 6 is inserted, and finally the stopper is inserted. Through the operation, a firm connection between the connecting shaft 2 and the base workpiece 1 is achieved. The tangential groove 21 abuts against the inclined surface 61 of the cylindrical split 6, so that the cylindrical split 6 can effectively fix the connecting shaft 2 in the mounting hole 11 to prevent it from loosening or falling off. The placement of the stopper, i.e., the combination bolt 3, further enhances the stability of the connection. In this way, a simple and effective connection method is provided, which improves the stability and reliability of the connecting shaft 2.

[0037] Further, a spring washer 5 is provided between the clamping nut 4 and the basic workpiece 1. The spring washer 5 is used to ensure that the connecting shaft 2 and the cylindrical wedge 6 are in close contact when the basic workpiece 1 and the connecting shaft 2 vibrate or expand thermally.

[0038] Reference Figure 2 and Figure 4 Furthermore, a second screw hole 62 is provided at the top of the cylindrical split 6. Through the second screw hole 62, a bolt is first screwed into the second screw hole 62 during disassembly. Since the second screw hole 62 and the bolt thread cooperate to have a self-locking effect, the cylindrical split 6 can be conveniently pulled out radially along the mounting hole 11.

[0039] In other embodiments, the cylindrical split 6 has another form, which is characterized in that the starting point of the inclined surface is at an appropriate distance from the top surface, and although the structural stability is enhanced, there are two disadvantages: one is that the adjustment distance is small, and the other is that the inclined surface is small, which reduces the contact area between the inclined surface and the bottom plane of the tangential groove, and slightly reduces the fastening force between the base workpiece 11 and the shaft 2.

[0040] The implementation principle of this embodiment is: By inserting the cylindrical split 6 into the mounting hole 11, the inclined surface 61 and the tangential groove 21 provided in the connecting shaft 2 are in contact with each other, thereby fixing the connecting shaft 2 and the basic workpiece 1. In addition, since the diameter of the cylindrical split 6 is smaller than the width of the tangential groove 21 of the connecting shaft 2, the connecting shaft 2 can be moved appropriately in the axial direction, so that the connecting shaft 2 is located in the most appropriate working position. The combination bolt 3 is screwed into the first screw hole 111 at the upper end of the mounting hole 11, and the lower end surface of the combination bolt 3 contacts the top of the cylindrical split 6. The combination bolt 3 is rotated clockwise to move the cylindrical split 6 downward in the mounting hole 11, so that the inclined surface 61 is pressed tightly against the bottom surface of the tangential groove 21, so that the connecting shaft 2 and the basic workpiece 1 are fastened together. After fastening, the clamping nut 4 is used to keep the two in a fastened state.

[0041] Embodiment 2: Reference Figure 5 , this embodiment is mainly used for the workpieces that are frequently assembled and disassembled, have high vibration frequency, frequently change the rotation direction of the shaft, and transmit large torque. This embodiment is provided with the same combination bolt 3, locking nut 4, spring washer 5, cylindrical split 6 and connecting shaft 2 as in the first embodiment. The difference between this embodiment and the first embodiment is that an anti-wear slide plate 7 is provided at the bottom of the tangential groove 21 of the connecting shaft 2. And, the mounting hole 11 is through-through downward, and a third screw hole 112 is provided below the mounting hole 11. The anti-wear slide plate 7 fixed on the connecting shaft 2 is used to prevent the wear and damage of the bottom plane of the tangential groove 21 caused by the frequent assembly and disassembly of the connecting shaft 2. The bevel angle of the cylindrical split 6 is smaller than the friction angle of the materials of the cylindrical split 6 and the anti-slide plate, so the two will self-lock after being pressed, and the two will still maintain close contact under the conditions of vibration or repeated changes of direction of the connecting shaft 2. When disassembling, the removed combination bolt 3 is screwed into the third screw hole 112 below the mounting hole 11 to push out the cylindrical split 6, or to place the combination bolt 3 therein to prevent wear. It is worth noting that the material hardness of the cylindrical splitter 6 is lower than that of the wear-resistant slide plate 7, so the inclined surface 61 is easily deformed or damaged. Therefore, it is suitable to be used as a consumable part and cannot be reused after removal.

[0042] Embodiment three: Reference Figure 6, this embodiment is mainly used for the cooperation of workpieces with small torque and small vibration, such as the connection between the rotating shaft and the butterfly plate of an eccentric butterfly valve. In this embodiment, the mounting hole 11 can be set as a blind hole structure instead of a through hole structure, so as to improve the airtightness of the basic workpiece 1. This embodiment is provided with the same cylindrical split 6 and connecting shaft 2 structure as in Example 1. The difference between this embodiment and Example 1 is that in this embodiment, the combination bolt 3 and the locking nut 4 are replaced by a screw column 8. The rest of the structure is the same. During the implementation process, steps one to four are the same. In step five, the limiter that presses the cylindrical split 6 replaces the combination bolt 3 with a screw column 8. Due to the small torque and vibration, the force of the screw column 8 against the top of the cylindrical split 6 is sufficient, and step six is ​​not required.

[0043] Further, the screw column 8 is a cylindrical structure, and the outer wall of the screw column 8 is provided with an external thread corresponding to the first screw hole 111. The top of the screw column 8, that is, the end away from the cylindrical split 6, is provided with a hexagonal groove 81. The hexagonal groove 81 is used to facilitate the assembly and disassembly of the screw column 8.

[0044] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A connection method using cylindrical splitting, characterized in that: include: Step 1: opening a mounting hole (11) on the base workpiece (1), wherein the mounting hole (11) is connected to the shaft coupling hole (12); Step 2: forming a tangential groove (21) on the outer wall of the connecting shaft (2); Step three, inserting the connecting shaft (2) into the connecting shaft hole (12) so that the tangential groove (21) enters into the mounting hole (11); Step 4: inserting a cylindrical splitter (6) into the mounting hole (11); the cylindrical splitter (6) is provided with an inclined surface (61), and the inclined surface (61) abuts against the bottom of the tangential groove (21); Step five: inserting a limiting member for limiting the cylindrical splitter (6) from leaving the mounting hole (11).

2. The connection method using cylindrical splitting according to claim 1, characterized in that: In the step 1, the center line of the mounting hole (11) deviates from the external tangent line of the coupling hole (12).

3. The connection method using cylindrical splitting according to claim 1, characterized in that: In step three, the tangential groove (21) is inclined upward.

4. The connection method using cylindrical splitting according to claim 1, characterized in that: The limiting member is a combination bolt (3); a first screw hole (111) is provided on the inner wall of the opening of the mounting hole (11); and the combination bolt (3) and the first screw hole (111) are threadedly connected.

5. The connection method using cylindrical splitting according to claim 1, characterized in that: A second screw hole (62) is provided on the top of the cylindrical split (6).

6. The connection method using cylindrical splitting according to claim 4, characterized in that: A locking nut (4) is threadedly connected to the combined bolt (3).

7. The connection method using cylindrical splitting according to claim 6, characterized in that: A spring washer (5) is provided at the rear end of the combined bolt (3).

8. The connection method using cylindrical splitting according to any one of claims 1 to 7, characterized in that: An anti-wear sliding plate (7) is provided at the bottom of the tangential groove (21).

9. The connection method using cylindrical splitting according to claim 8, characterized in that: The mounting hole (11) passes through the base workpiece (1), and a third screw hole (112) is provided at the bottom of the mounting hole (11).

10. The connection method using cylindrical splitting according to claim 1, characterized in that: The limiting member is a screw column (8), and a hexagonal groove (81) is formed on the top of the screw column (8).

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