Connecting structure of shaft and flange

Abstract

The utility model relates to the field of flange shafts, in particular to a shaft and flange connecting structure which comprises a shaft body and a flange plate, the flange plate is provided with a first positioning groove allowing the end of the shaft body to be clamped in, the flange plate is provided with a plurality of screw holes allowing bolts to penetrate through, and the flange plate is provided with a plurality of sliding ways communicating the screw holes with the first positioning groove. A plurality of positioning keys are slidably connected in the slide way, a plurality of clamping grooves for the positioning keys to be clamped are formed in the shaft body, the inner walls of the clamping grooves are machined to form first guide faces, and the first guide faces abut against the positioning keys when the shaft body moves and breaks away from the first positioning grooves, so that the positioning keys move and break away from the clamping grooves. A second guide face is arranged at the end, close to the screw hole, of the positioning key and abuts against the bolt when the bolt penetrates through the screw hole, so that the positioning key moves and is clamped into the clamping groove. And the shaft body and the flange plate of the flange shaft are respectively transported and then assembled, so that a worker can carry and stack the shaft body and the flange plate conveniently, and the transportation efficiency can be improved.

Description

Technical fields:

[0001] This utility model belongs to the technical field of flange shafts, and specifically refers to a connection structure between a shaft and a flange. Background technology:

[0002] A flange shaft is a mechanical component that combines a shaft body and a flange. It is used in the transmission systems of light industrial equipment and in the fixed applications of household machinery. Common flange shafts consist of a shaft and flange formed as a single unit through welding, forging, or integral machining. In actual connection, the equipment is typically connected by tightening the flanges on the two flange shafts with bolts and nuts.

[0003] The integral flange shaft, due to its fixed shape and size, is difficult to handle and stack, making transportation inconvenient and requiring improvement. Summary of the Invention:

[0004] The purpose of this utility model is to provide a connection structure between a shaft and a flange to solve the technical problems mentioned in the background art.

[0005] This utility model is implemented as follows:

[0006] A shaft-flange connection structure includes a shaft and a flange. The flange has a positioning groove for the end of the shaft to engage, and several threaded holes for bolts to pass through. Several slides connecting the threaded holes and the positioning groove are also provided on the flange. Several positioning keys are slidably connected within the slides. The shaft has several slots for the positioning keys to engage. A guide surface is machined into the inner wall of each slot. When the shaft moves away from the positioning groove, the guide surface abuts against the positioning key, causing the positioning key to move away from the slot. A second guide surface is provided at the end of each positioning key near the threaded hole. When the bolt passes through the threaded hole, the guide surface abuts against the bolt, causing the positioning key to move and engage in the slot.

[0007] By adopting the above technical solution, when assembling the flange shaft, after moving several locating keys out of the first locating groove, the shaft body is inserted into the first locating groove. Rotating the shaft body connects the groove with the corresponding slide rail, and bolts are inserted into the bolt holes. The bolts, through the second guide surface, drive the locating keys into the corresponding grooves to fix the shaft body and flange. When the shaft or flange is damaged, the bolts are removed, and the shaft body is moved out of the locating groove. Through the cooperation between the first guide surface and the locating keys, the locating keys move out of the grooves during the shaft's disengagement, releasing the positioning and making the assembly and disassembly of the shaft and flange convenient. Transporting the flange shaft body and flange separately before assembly facilitates handling and stacking by workers, improving transportation efficiency.

[0008] Preferably, the first guide surface and the second guide surface are arc surfaces or inclined surfaces.

[0009] By adopting the above technical solution, it is convenient to process guide surface one and guide surface two.

[0010] Preferably, the positioning key includes a sliding part slidably connected in the slide rail and a spherical part disposed on the sliding part, the guide surface is disposed on the sliding part, and the spherical surface of the spherical part is located in the assembly gap between the shaft and the flange.

[0011] By adopting the above technical solution, when the flange shaft rotates, the torque between the shaft and the flange acts on the locating key. By setting the spherical surface of the spherical part in the assembly gap, it is beneficial to reduce the stress concentration phenomenon of the locating key in the assembly gap area.

[0012] Preferably, the sliding part is provided with a shock-absorbing pad, and the sliding part abuts against the outer wall of the bolt through the shock-absorbing pad.

[0013] By adopting the above technical solution, and by setting a damping pad between the bolt and the locating key, the vibration at the shaft is effectively attenuated and transmitted to the bolt through the locating key, which is beneficial to the stability of the bolt connection.

[0014] Preferably, the positioning key abuts against the inner wall of the slot and the bolt at its opposite ends. The slide is inclined, and the slide is inclined towards the inner wall of the bottom of the positioning groove along the direction close to the axis of the shaft.

[0015] By adopting the above technical solution, by setting the slide rail inclined along the direction close to the shaft center, when the positioning key positions the shaft and the flange, the axial component force generated by it acts directly on the shaft, thereby causing the two flanges to have a tendency to pre-tighten towards each other, which is beneficial to improving the tightness of the connection between the two flange shafts.

[0016] Preferably, the flange has a plurality of mounting grooves, the position and number of which correspond to the position and number of the slide rails and the screw holes, respectively. The mounting grooves and the slide rails are located on opposite sides of the screw holes and communicate with the screw holes. The locating key is installed into the slide rail through the mounting groove, and a plug is threaded into the mounting groove.

[0017] By adopting the above technical solution, it is easy to install the positioning key. When the positioning key is damaged, the moving bolt can be removed from the flange and the positioning key can be taken out and replaced.

[0018] Preferably, the plug has an oil passage that communicates with the screw hole.

[0019] By adopting the above technical solution, it is convenient to inject lubricating medium regularly through the oil passage.

[0020] Preferably, the shaft is provided with a positioning block, and the flange is provided with a positioning groove 2 for the positioning block to be inserted into. When the positioning block is inserted into the positioning groove 2, the grooves are connected to the slide rail.

[0021] By adopting the above technical solution, it is easy for the slide to connect with the corresponding slot, and easy for the positioning key to be inserted into the corresponding slot.

[0022] The outstanding advantages of this utility model compared to the prior art are:

[0023] 1. This utility model allows the flange shaft body and flange plate to be transported separately before assembly, which facilitates handling and stacking by workers and improves transportation efficiency.

[0024] 2. This utility model effectively attenuates vibrations at the shaft that are transmitted to the bolt via the locating key by setting a shock-absorbing pad between the bolt and the locating key, which is beneficial to the stability of the bolt connection;

[0025] 3. By tilting the slide rail along the direction close to the shaft center, the axial force generated by the positioning key when positioning the shaft and flange directly acts on the shaft, thereby causing the two flanges to have a tendency to pre-tighten towards each other, which is beneficial to improving the tightness of the connection between the two flange shafts. Attached image description:

[0026] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0027] Figure 2 This is a sectional view of the flange, shaft, bolts and nuts of this utility model, mainly showing the connection structure between the shaft and the flange;

[0028] Figure 3 make Figure 2 The enlarged view of section A mainly shows the structure of the locating key.

[0029] Instruction manual drawing reference numerals: 1. Shaft; 11. Slot; 111. Guide surface one; 12. Positioning block; 2. Flange; 21. Screw hole; 22. Positioning groove one; 23. Slide rail; 24. Positioning groove two; 25. Mounting groove; 26. Block; 261. Oil passage; 3. Positioning key; 31. Sliding part; 311. Vibration damping pad; 32. Spherical part; 321. Guide surface two; 4. Bolt; 5. Nut. Detailed implementation method:

[0030] The present invention will be further described below with reference to specific embodiments:

[0031] This application discloses a connection structure between a shaft and a flange. See also... Figure 1 and Figure 2The flange 2 includes a shaft 1 and a flange 2. The flange 2 has several bolt holes 21 evenly spaced around its axis, for bolts 4 to pass through. A positioning groove 22 is located on one side of the flange 2 along its axial direction. The positioning groove 22 has a circular cross-section perpendicular to the axial direction of the flange 2. The positioning groove 22 allows the shaft 1 to be inserted, with its inner wall conforming to the outer wall of the shaft 1 for positioning, ensuring coaxiality between the shaft 1 and the flange 2.

[0032] See Figure 2 The flange 2 has several slides 23. The position and number of slides 23 correspond one-to-one with the position and number of screw holes 21. The slides 23 are spaced around the outer periphery of the positioning groove 22. The slides 23 are located on the side of the corresponding screw hole 21 that is close to the positioning groove 22. The slides 23 connect the positioning groove 22 and the corresponding screw hole 21. The path of the slides 23 is inclined. The slides 23 are inclined along the direction close to the axis of the flange 2 and close to the bottom of the positioning groove 22.

[0033] See Figure 2 The shaft 1 has several slots 11, which are evenly distributed around the axis of the shaft 1. The position and number of slots 11 correspond one-to-one with the position and number of slides 23. The flange 2 has a second positioning slot 24 at one end near the first positioning slot 22. The second positioning slot 24 is connected to the first positioning slot 22. A positioning block 12 is fixed on the shaft 1. The second positioning slot 24 is for the positioning block 12 to be inserted into. The inner wall of the second positioning slot 24 is in contact with the positioning block 12.

[0034] See Figure 2 When the positioning block 12 and the shaft 1 are respectively inserted into the positioning groove 24 and the positioning groove 22, the groove 11 is connected to the corresponding slide 23.

[0035] See Figure 2 Several positioning keys 3 are slidably connected on the flange 2. The position and number of positioning keys 3 correspond one-to-one with the position and number of slide rails 23. The positioning keys 3 slide in the corresponding slide rails 23. Several positioning keys 3 move along the inclined direction of slide rails 23. The end of the positioning key 3 near the positioning groove 22 slides into or out of the positioning groove 22. The end of the positioning key 3 near the screw hole 21 slides into or out of the screw hole 21. The position and number of slots 11 correspond one-to-one with the position and number of positioning keys 3. The slots 11 are for the positioning keys 3 to be engaged. The positioning keys 3 are used to position the shaft 1 and the flange 2.

[0036] See Figure 2 and Figure 3The positioning key 3 includes a sliding part 31 and a spherical part 32. The sliding part 31 and the spherical part 32 are integrally formed. The distribution direction of the sliding part 31 and the spherical part 32 is parallel to the sliding direction of the positioning key 3. The spherical part 32 is located on the side of the sliding part 31 close to the slot 11. The outer peripheral wall of the bolt 4 abuts against the sliding part 31 so that the sliding part 31 is inserted into the corresponding slot 11. The spherical surface of the spherical part 32 is located in the assembly gap between the shaft 1 and the flange 2.

[0037] See Figure 2 and Figure 3 The inner wall of the slot 11 is machined to form a guide surface 111, and the sliding part 31 is machined to form a guide surface 321. The guide surface 111 and the guide surface 321 are arc surfaces or inclined surfaces.

[0038] See Figure 2 and Figure 3 When both guide surface 111 and guide surface 321 are arc surfaces, guide surface 111 protrudes in the direction away from the spherical part 32. The end of the spherical part 32 near the center of the spherical part 32 is inserted into the slot 11 and fits against guide surface 111. When the bolt 4 is not installed in the screw hole 21, and the shaft 1 moves away from the positioning slot 22 along the axial direction, guide surface 111 causes the spherical part 32 to move away from the slot 11 and release the positioning. Guide surface 321 is located at the end of the sliding part 31 near the screw hole 21, and guide surface 321 protrudes in the direction away from the spherical part 32. During the process of the bolt 4 passing through the screw hole 21 along the axial direction, it abuts against guide surface 321, causing the sliding part 31 to move away from the screw hole 21, and causing the spherical part 32 to be inserted into the corresponding slot 11.

[0039] When both guide surface 111 and guide surface 321 are inclined surfaces, guide surface 111 is located on the side of the slot 11 near the bottom wall of the positioning slot 22. Guide surface 111 is inclined towards the slide rail 23 in a direction away from the axis of the shaft 1. Guide surface 111 fits against the spherical surface that is inserted into the slot 11. Guide surface 321 is located at the end of the sliding part 31 near the screw hole 21. Guide surface 321 is inclined away from the other flange shaft in a direction close to the shaft 1. The inclination direction of guide surface 321 in the axial direction is opposite to the inclination direction of the slide rail 23.

[0040] The guide surface 111 and guide surface 321 shown in the accompanying drawings of this specification are arc surfaces.

[0041] During the assembly of shaft 1 and flange 2, shaft 1 is inserted into positioning groove 22. When bolt 4 is inserted into bolt hole 21, the spherical part 32 is inserted into groove 11 for positioning through the cooperation between guide surface 321 and bolt 4. After bolt 4 and flange 2 are fixed by locking bolt 4 with nut 5, bolt 4 abuts against positioning key 3 so that positioning key 3 abuts against inner wall of groove 11, thus fixing shaft 1 and flange 2.

[0042] When it is necessary to disassemble or replace the shaft 1 or flange 2, rotate the nut 5 to disengage the bolt 4, move the bolt 4 to disengage the locating key 3, thus releasing the locating key 3 from its position. Move the shaft 1 along the axial direction in the direction of disengaging from the locating groove. The guide surface 111 abuts against the spherical part 32, causing the locating key 3 to move away from the retaining groove 11 and disengage from it, thereby removing the shaft 1. This facilitates the disassembly of the flange shaft.

[0043] See Figure 2 and Figure 3 A damping pad is fixed on the sliding part 31. The damping pad is located on the side of the sliding part 31 away from the spherical part 32. The sliding part 31 presses against the outer peripheral wall of the bolt 4 through the damping pad, reducing the transmission of vibration at the shaft 1 to the bolt 4. In this embodiment, the damping pad 311 is a rubber pad or a nylon pad.

[0044] See Figure 1 and Figure 2 The flange 2 has several mounting slots 25, the position and number of which correspond one-to-one with the position and number of slide rails 23. The mounting slots 25 and the corresponding slide rails 23 are located on opposite sides of the bolt holes 21, and are connected through the bolt holes 21. The locating key 3 enters the slide rail 23 through the mounting slot 25. The flange 2 has several plugs 26 threadedly connected to it, the position and number of which correspond one-to-one with the position and number of the mounting slots 25. The plugs 26 are threadedly connected to the corresponding mounting slots 25 to prevent the locating key 3 from disengaging from the flange 2.

[0045] See Figure 1 and Figure 2 The plug 26 has an oil passage 261 that is connected to the screw hole 21, which facilitates the injection of lubricating oil into the screw hole 21 to lubricate the bolt 4.

[0046] After the bolts 4 and nuts 5 assemble the flanges 2 on the two flange shafts together, several bolts 4 abut against the corresponding locating keys 3, causing several locating keys 3 to abut against the shaft 1. The axial component force generated by the locating keys 3 acts directly on the shaft 1, thereby causing the two flanges 2 to have a tendency to pre-tighten towards each other, which is beneficial to improving the tightness of the connection between the two flange shafts.

[0047] The implementation principle of this application embodiment is as follows: the shaft body 1 and flange 2 of the flange shaft are transported separately and then assembled, which facilitates the handling and stacking by the staff and helps to improve transportation efficiency.

[0048] The above embodiments are only one of the preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes made in accordance with the shape, structure and principle of this utility model should be covered within the protection scope of this utility model.

Claims

1. A connection structure between a shaft and a flange, characterized in that: The device includes a shaft (1) and a flange (2). The flange (2) has a positioning groove (22) for the end of the shaft (1) to be inserted into. The flange (2) has several threaded holes (21) for bolts (4) to pass through. The flange (2) has several slides (23) connecting the threaded holes (21) and the positioning groove (22). Several positioning keys (3) are slidably connected within the slides (23). The shaft (1) has several slots (11) for the positioning keys (3) to be inserted into. The inner wall of the slot (11) is machined to form a guide surface (321). When the shaft (1) moves away from the positioning slot (22), the guide surface (321) abuts against the positioning key (3), causing the positioning key (3) to move away from the slot (11). The positioning key (3) has a guide surface (111) at one end near the screw hole (21). When the bolt (4) passes through the screw hole (21), the guide surface (111) abuts against the bolt (4), causing the positioning key (3) to move and engage in the slot (11).

2. The connection structure between a shaft and a flange according to claim 1, characterized in that: The first guide surface (321) and the second guide surface (111) are arc surfaces or inclined surfaces.

3. The connection structure between a shaft and a flange according to claim 1, characterized in that: The positioning key (3) includes a sliding part (31) that is slidably connected in the slide (23) and a spherical part (32) provided on the sliding part (31). The guide surface (111) is provided on the sliding part (31). The spherical surface of the spherical part (32) is located in the assembly gap between the shaft (1) and the flange (2).

4. The connection structure between a shaft and a flange according to claim 3, characterized in that: The sliding part (31) is provided with a vibration damping pad (311), and the sliding part (31) abuts against the outer wall of the bolt (4) through the vibration damping pad (311).

5. The connection structure between a shaft and a flange according to claim 4, characterized in that: The slide (23) is inclined and is inclined along the axis of the flange (2) to the inner wall of the bottom of the positioning groove (22).

6. The connection structure between a shaft and a flange according to claim 1, characterized in that: The flange (2) is provided with a number of mounting slots (25). The position and number of the mounting slots (25) correspond to the position and number of the slide rails (23) and the screw holes (21). The mounting slots (25) and the slide rails (23) are located on opposite sides of the corresponding screw holes (21) and communicate with the screw holes (21). The positioning key (3) is installed into the slide rails (23) through the mounting slots (25). A plug (26) is threaded into the mounting slots (25).

7. The connection structure between a shaft and a flange according to claim 6, characterized in that: The plug (26) has an oil passage (261) which is connected to the screw hole (21).

8. The connection structure between a shaft and a flange according to claim 1, characterized in that: The shaft (1) is provided with a positioning block (12), and the flange (2) is provided with a positioning groove (24) for the positioning block (12) to be inserted. When the positioning block (12) is inserted into the positioning groove (24), a plurality of the slots (11) are connected to the slide (23).

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