High-nitrogen chromium-manganese non-magnetic stainless steel stepped shaft axial positioning structure

Abstract

The application relates to the technical field of mechanical transmission structures and discloses an axial positioning structure of a high-nitrogen chromium-manganese non-magnetic stainless steel stepped shaft, which comprises a shaft body, the end of the shaft body is fixedly connected with an extension shaft head, the outer surface of the extension shaft head is provided with a positioning assembly, the end, away from the shaft body, of the extension shaft head is provided with a locking assembly, the inside of the locking assembly is provided with a protection assembly, the positioning assembly comprises a hoop plate movably sleeved on the outer surface of the extension shaft head, the outer surface of the extension shaft head is provided with a positioning groove, the outer surface of the extension shaft head is sleeved with a hoop ring, and the side edge of the hoop ring is fixedly connected with a bevel ring. The double-positioning guarantee is realized through the positioning assembly, the hoop plate is aligned and locked to the workpiece through positioning blocks and positioning bolts, axial rigid positioning of the extension shaft head is formed, the axial stability of the shaft body is ensured, the two semicircular hoop rings are clamped into the recesses at the joint positions in a mortise-and-tenon structure, the hoop plate is tightly butted to realize flexible pressing and limiting, and the stability and reliability of the whole positioning structure are further enhanced through the combination of rigidity and flexibility.

Description

Technical Field

[0001] This invention relates to the field of mechanical transmission structure technology, and in particular to an axial positioning structure for a high-nitrogen, chromium-manganese, non-magnetic stainless steel stepped shaft. Background Technology

[0002] Stepped shafts are stepped shaft parts widely used in mechanical transmission systems. Their core feature is that the shaft diameter changes in a stepped manner along the axial direction. Different diameter shaft segments are used to achieve part assembly positioning, load transmission, and spatial separation. Made of high-nitrogen chromium-manganese non-magnetic stainless steel, stepped shafts have both high tensile strength and excellent corrosion resistance. The axial positioning structure is used to limit the movement of the shaft and the parts on the shaft along the axial direction, ensuring transmission accuracy and component stability.

[0003] A search revealed Chinese patent CN208885764U: An axial positioning structure for a stepped shaft, comprising a stepped shaft and a rubber O-ring. The stepped shaft is positioned and fitted with a part. The stepped shaft has a large-diameter section and a small-diameter section, which fit together to form a stepped portion. A groove is provided on the outer end of the small-diameter section of the stepped shaft. The rubber O-ring is installed in the groove of the stepped shaft. The part has a positioning hole. The small-diameter section of the stepped shaft is inserted into the positioning hole of the part. The stepped portion of the stepped shaft abuts against the front side of the part. The rubber O-ring installed on the stepped shaft abuts against the rear side of the part. The stepped portion of the stepped shaft and the rubber O-ring fit together to position and install the stepped shaft in the positioning hole of the part. This utility model has a simple structure, is easy to install and disassemble, requires no other tools, has low manufacturing cost, and is not limited by space.

[0004] However, the above technical solution still has the following shortcomings when implemented: The structure of using rubber rings for positioning the extended section connecting the stepped shaft and the workpiece has significant defects. First, the positioning stability is low. Due to the inherent elasticity of the rubber rings, the axial constraint capacity is weak, making it difficult to ensure accurate positioning. Once the stepped shaft undergoes axial displacement, the rubber rings cannot form effective resistance, and the axial positioning effect is greatly limited. Second, the protective performance is lacking. This positioning method cannot form a sealed protection for the connection between the stepped shaft and the workpiece, resulting in the connection being exposed to the air for a long time. During the operation of the stepped shaft, the surface anti-rust layer is easily damaged by friction. Especially in high humidity environments, the damaged parts are very prone to corrosion, which not only affects the transmission performance of the stepped shaft but also greatly shortens its overall service life.

[0005] Therefore, it is necessary to design an axial positioning structure for a high-nitrogen, chromium-manganese, non-magnetic stainless steel stepped shaft to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of existing technologies by proposing an axial positioning structure for a high-nitrogen, chromium-manganese, non-magnetic stainless steel stepped shaft.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] An axial positioning structure for a high-nitrogen, chromium-manganese, non-magnetic stainless steel stepped shaft includes a shaft body, an extended shaft head fixedly connected to the end of the shaft body, a positioning component provided on the outer surface of the extended shaft head, a locking component provided at the end of the extended shaft head away from the shaft body, and a protective component provided inside the locking component.

[0009] The positioning component includes a hoop plate movably sleeved on the outer surface of the extension shaft head, a positioning groove is provided on the outer surface of the extension shaft head, a hoop ring is sleeved on the outer surface of the extension shaft head, and a slanted ring is fixedly connected to the side of the hoop ring.

[0010] The locking assembly includes a round cap disposed at the end of the extension shaft head, and a screw is fixedly connected to the middle of the inner wall of the round cap.

[0011] As a preferred embodiment of the present invention, the positioning grooves are arranged in a ring array along the outer surface of the extension shaft head, the inner wall of the hoop plate is fixedly connected with a positioning block, the positioning block is slidably engaged in the interior of the positioning groove, and a pin groove is formed through the outer surface of the hoop plate, the interior of the pin groove is threaded with a positioning bolt.

[0012] As a preferred technical solution of the present invention, the hoop adopts a semi-circular ring structure design and there are two of them. One end of the two hoops is provided with a locking block, and the other end is provided with a locking groove. The locking block is locked inside the locking groove.

[0013] As a preferred embodiment of the present invention, the outer surface of the extension shaft head is provided with a groove, the inner side of the hoop is fixedly connected with an inner ring, the inner ring is engaged inside the groove, and the hoop abuts against the outer surface of the hoop plate.

[0014] As a preferred embodiment of the present invention, the end of the extension shaft head is provided with a threaded hole, the screw is threadedly connected to the inside of the threaded hole, the round cap is sleeved on the outer surface of the extension shaft head, the outer surface of the round cap is attached to the outer surface of the positioning bolt, and a sealing ring is fixedly connected to the inner wall of the round cap, and the sealing ring is abutted and sleeved on the outer surface of the hoop.

[0015] As a preferred embodiment of the present invention, the protective component includes an arc-shaped groove formed on the outer surface of the round cap, a connecting plate is slidably engaged inside the arc-shaped groove, a grinding disc is fixedly connected to one end of the connecting plate that extends into the round cap, a solid lubricating block is provided inside the round cap, and the outer surface of the grinding disc abuts against the outer surface of the solid lubricating block.

[0016] As a preferred embodiment of the present invention, a knob is fixedly connected to one end of the connecting plate extending from the round cap, and two arc-shaped grooves are provided and symmetrically arranged with respect to the center point of the round cap.

[0017] As a preferred embodiment of the present invention, a friction ring is embedded in the inner wall of the round cap, the side of the grinding disc abuts against the outer surface of the friction ring, a pressure plate is slidably connected to the inner wall of the round cap, the outer surface of the pressure plate abuts against the outer surface of the solid lubricating block, and the pressure plate and the grinding disc clamp the two sides of the solid lubricating block.

[0018] As a preferred embodiment of the present invention, the outer surface of the sealing ring is provided with a storage groove, and a spring is provided inside the storage groove. The end of the spring away from the storage groove abuts against the outer surface of the pressure plate.

[0019] As a preferred embodiment of the present invention, a channel is provided at the connection between the shaft body and the extension shaft head, the channel extends through the middle of the shaft body, an installation groove is provided on the outer surface of the shaft body, and a drain hole is provided through the inner wall of the installation groove, the drain hole communicating with the channel.

[0020] The present invention has the following beneficial effects:

[0021] 1. By setting up positioning components, dual positioning protection is achieved. The hoop plate is aligned with the positioning block and locked to the workpiece by the positioning bolt, forming an axial rigid positioning of the extended shaft head to ensure the axial stability of the shaft body. The two semi-circular hoop rings are inserted into the groove at the joint with a tenon and mortise structure, and tightly abut against the hoop plate to achieve flexible pressing and limiting. The combination of rigidity and flexibility further enhances the stability and reliability of the entire positioning structure.

[0022] 2. By setting a locking component that combines sealing and anti-loosening functions, after the round cap is installed by the screw, the inner sealing ring slides along the inclined ring to press against the hoop ring, effectively blocking moisture from entering the connection between the workpiece and the shaft body, avoiding corrosion and extending service life. At the same time, the outer surface of the round cap fits against the end of the positioning bolt, which can limit the bolt and prevent it from loosening during the operation of the workpiece, thus improving installation stability.

[0023] 3. By setting up protective components, full lubrication can be achieved without disassembly. Turning the knob drives the grinding disc to reciprocate and rub against the wax-based solid lubricant block. After the debris melts due to frictional heat, it lubricates the connection and transmission key along the channel. The lubrication range is wide and the efficiency is high. The spring on the sealing ring side pushes the pressure plate to continuously compress the lubricant block. It can be replenished in real time as it is consumed, ensuring that the lubricant block is always in contact with the grinding disc and ensuring that the lubrication function is stable. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the axial positioning structure of the high-nitrogen chromium-manganese non-magnetic stainless steel stepped shaft proposed in this invention.

[0025] Figure 2 This is a schematic diagram of the connection structure between the shaft body and the extended shaft head of the axial positioning structure of the high-nitrogen chromium-manganese non-magnetic stainless steel stepped shaft proposed in this invention.

[0026] Figure 3 This is a schematic diagram of the shaft structure of the axial positioning structure of the high-nitrogen chromium-manganese non-magnetic stainless steel stepped shaft proposed in this invention.

[0027] Figure 4 This is a schematic diagram of the positioning component structure of the axial positioning structure of the high-nitrogen chromium-manganese non-magnetic stainless steel stepped shaft proposed in this invention.

[0028] Figure 5 This is a schematic diagram of the hoop structure of the axial positioning structure of the high-nitrogen chromium-manganese non-magnetic stainless steel stepped shaft proposed in this invention.

[0029] Figure 6 This is a schematic diagram of the locking component structure of the axial positioning structure of the high-nitrogen chromium-manganese non-magnetic stainless steel stepped shaft proposed in this invention.

[0030] Figure 7 This is a schematic diagram of the locking and protective components of the axial positioning structure of the high-nitrogen chromium-manganese non-magnetic stainless steel stepped shaft proposed in this invention.

[0031] Figure 8 This is a schematic diagram of the internal structure of the round cap of the axial positioning structure of the high-nitrogen chromium-manganese non-magnetic stainless steel stepped shaft proposed in this invention.

[0032] In the diagram: 1. Shaft body; 2. Extended shaft head; 3. Positioning assembly; 31. Hoop plate; 32. Positioning block; 33. Positioning groove; 34. Pin groove; 35. Positioning bolt; 36. Hoop ring; 37. Slanted ring; 38. Inner ring; 39. Groove; 310. Slot; 311. Slot block; 4. Locking assembly; 41. Round cap; 42. Screw; 43. Threaded hole; 44. Sealing ring; 5. Protective assembly; 51. Knob; 52. Connecting plate; 53. Grinding disc; 54. Arc groove; 55. Solid lubricant block; 56. Spring; 57. Pressure plate; 58. Friction ring; 59. Storage groove; 510. Channel; 511. Mounting groove; 512. Leakage hole. Detailed Implementation

[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0034] Reference Figures 1 to 8The axial positioning structure of the high nitrogen chromium manganese non-magnetic stainless steel stepped shaft includes a shaft body 1, an extension shaft head 2 fixedly connected to the end of the shaft body 1, a positioning component 3 provided on the outer surface of the extension shaft head 2, a locking component 4 provided at the end of the extension shaft head 2 away from the shaft body 1, and a protective component 5 provided inside the locking component 4.

[0035] In use, the transmission component is installed on the outer surface of the shaft body 1, and the shaft body 1 is fixedly installed at the installation position of the workpiece using the transmission component. Then, the positioning component 3 is installed to achieve axial positioning, ensuring the axial stability of the shaft body 1 and the reliability of the transmission. Then, the locking component 4 is used to lock the positioning component 3 and the extension shaft head 2, which further improves the stability of the stepped shaft and the workpiece installation. In the subsequent maintenance process, the protective component 5 can be used to achieve lubrication maintenance without disassembly. The lubrication range is large, covering the entire transmission connection part of the stepped shaft, with good lubrication maintenance effect and high efficiency.

[0036] Reference Figures 2 to 5 The positioning component 3 includes a hoop plate 31 movably sleeved on the outer surface of the extension shaft head 2. The outer surface of the extension shaft head 2 is provided with a positioning groove 33. A hoop ring 36 is sleeved on the outer surface of the extension shaft head 2. An inclined ring 37 is fixedly connected to the side of the hoop ring 36. The positioning groove 33 is distributed in a ring array along the outer surface of the extension shaft head 2. A positioning block 32 is fixedly connected to the inner wall of the hoop plate 31. The positioning block 32 is slidably engaged in the interior of the positioning groove 33. A pin groove 34 is provided through the outer surface of the hoop plate 31. A positioning bolt 35 is threadedly connected to the interior of the pin groove 34. The hoop ring 36 adopts a semi-circular ring structure design and has two rings. One end of the two hoop rings 36 is provided with a locking block 311, and the other end is provided with a locking groove 310. The locking block 311 is engaged in the interior of the locking groove 310. A groove 39 is provided on the outer surface of the extension shaft head 2. An inner ring 38 is fixedly connected to the inner side of the hoop ring 36. The inner ring 38 is engaged in the interior of the groove 39. The hoop ring 36 abuts against the outer surface of the hoop plate 31.

[0037] After the stepped shaft is installed, the shaft body 1 is located inside the workpiece, and the extended shaft head 2 extends out from inside the workpiece. Then, the positioning component 3 is installed. The positioning block 32 in the middle of the hoop 31 is aligned with the positioning groove 33. The hoop 31 is pushed so that it fits against the outer surface of the workpiece. Then, the positioning bolt 35 is aligned with the pin groove 34 and screwed in. The positioning bolt 35 passes through the pin groove 34 on the surface of the hoop 31 and is screwed into the reserved hole on the outer surface of the workpiece, thereby locking the hoop 31 on the outer surface of the workpiece. The hoop 31 provides axial rigid positioning for the extended shaft head 2, ensuring the axial stability of the shaft body 1.

[0038] Two hoop rings 36 are snapped into the groove 39 at the junction of the extension shaft head 2 and the hoop plate 31. Each hoop ring 36 adopts a semi-circular design. The inner rings 38 on the inner side of the two semi-circular hoop rings 36 are aligned with the groove 39 and snapped in. At the same time, the slots 310 of the two hoop rings 36 are staggered and aligned with the locking blocks 311. During installation, the locking blocks 311 on one side are snapped into the slots 310 on the other side. In this way, the two hoop rings 36 are merged into a complete circular hoop using a tenon and mortise structure and snapped into the groove 39. The hoop rings 36 will tightly abut against the outer surface of the hoop plate 31 to achieve flexible pressing and limiting of the hoop plate 31, further enhancing the stability and reliability of the entire positioning structure.

[0039] Reference Figure 2 , Figure 3 and Figure 6 The locking assembly 4 includes a round cap 41 disposed at the end of the extension shaft head 2. A screw 42 is fixedly connected to the middle of the inner wall of the round cap 41. A threaded hole 43 is opened at the end of the extension shaft head 2. The screw 42 is threadedly connected to the inside of the threaded hole 43. The round cap 41 is sleeved on the outer surface of the extension shaft head 2. The outer surface of the round cap 41 is in contact with the outer surface of the positioning bolt 35. A sealing ring 44 is fixedly connected to the inner wall of the round cap 41. The sealing ring 44 abuts against the outer surface of the hoop 36.

[0040] Align the screw 42 inside the round cap 41 with the threaded hole 43 at the end of the extension shaft head 2, and rotate the round cap 41 to screw the screw 42 into the threaded hole 43. At the same time, the round cap 41 is also fitted onto the outer surface of the extension shaft head 2. During the movement of the round cap 41, the sealing ring 44 on the inner wall of the round cap 41 will contact the inclined ring 37, and then gradually slide along the outer surface of the inclined ring 37 as the movement continues. The design of the inclined ring 37 makes the sealing ring 44 press against the outer surface of the hoop ring 36, thus achieving a sealing effect and preventing moisture from entering the connection between the workpiece and the shaft body 1, causing corrosion and improving the service life of the stepped shaft. In addition, after the round cap 41 is installed, its outer surface will fit against the side of the end of the positioning bolt 35, which can also limit the positioning bolt 35 and prevent the positioning bolt 35 from loosening during the subsequent movement of the workpiece, further improving the stability of the installation of the stepped shaft and the workpiece.

[0041] Reference Figure 2 , Figure 3 , Figure 7 and Figure 8The protective component 5 includes an arc-shaped groove 54 formed on the outer surface of the round cap 41. A connecting plate 52 is slidably engaged inside the arc-shaped groove 54. A grinding disc 53 is fixedly connected to one end of the connecting plate 52 that extends into the round cap 41. A solid lubricating block 55 is provided inside the round cap 41. The outer surface of the grinding disc 53 abuts against the outer surface of the solid lubricating block 55. A knob 51 is fixedly connected to one end of the connecting plate 52 that extends out of the round cap 41. Two arc-shaped grooves 54 are provided and symmetrically arranged around the center point of the round cap 41. A friction ring 58 is embedded in the inner wall of the round cap 41. The side of the grinding disc 53 abuts against the outer surface of the friction ring 58. The inner wall of the round cap 41 slides... A pressure plate 57 is dynamically connected, and the outer surface of the pressure plate 57 abuts against the outer surface of the solid lubricating block 55. The pressure plate 57 and the grinding disc 53 clamp the two sides of the solid lubricating block 55. A storage groove 59 is opened on the outer surface of the sealing ring 44. A spring 56 is installed inside the storage groove 59. The end of the spring 56 away from the storage groove 59 abuts against the outer surface of the pressure plate 57. A channel 510 is opened at the connection between the shaft body 1 and the extended shaft head 2. The channel 510 passes through the middle of the shaft body 1. An installation groove 511 is opened on the outer surface of the shaft body 1. A drain hole 512 is opened through the inner wall of the installation groove 511. The drain hole 512 communicates with the channel 510.

[0042] Rotating the knob 51 on the outer surface of the end of the round cap 41 causes the grinding disc 53 to rotate via the connecting plate 52. Since the two arc-shaped grooves 54 are not connected, the knob 51 needs to be rotated repeatedly, which in turn causes the grinding disc 53 to rotate rapidly back and forth. The rotation of the grinding disc 53 causes relative sliding with the friction ring 58, generating heat through friction. Furthermore, the grinding disc 53 rubs against the solid lubricant block 55 during rotation, scraping debris off its outer surface. The solid lubricant block 55 is made of wax, and the frictional heat melts the debris. The melted debris flows into the positioning groove 33 of the extension shaft head 2 within the round cap 41, and then along the channel 510. The flow is facilitated by the outlet at the other end of the channel 510, which is located at the high and low joint of the stepped shaft. This lubricates the connection between the stepped shaft and the workpiece. At the same time, the lubricating oil also flows into the mounting groove 511 through the leakage hole 512 of the channel 510 and the mounting groove 511, thus lubricating the transmission key. Lubrication and maintenance can be achieved without disassembling any parts. Moreover, the lubrication range is large, covering the entire transmission connection of the stepped shaft. The lubrication and maintenance effect is good and efficient. As the solid lubricating block 55 is used and consumed, its volume will shrink. The spring 56 is in a compressed state and can push the pressure plate 57 in real time to press the solid lubricating block 55 against the grinding disc 53, ensuring the normal use of the solid lubricating block 55.

[0043] The specific working principle of this invention is as follows:

[0044] The axial positioning structure of the high-nitrogen chromium-manganese non-magnetic stainless steel stepped shaft proposed in this invention consists of a shaft body 1 and an extended shaft head 2. In use, the transmission component is installed on the outer surface of the shaft body 1, and the shaft body 1 is fixed to the workpiece's mounting position using the transmission component. After installation, the shaft body 1 is located inside the workpiece, and the extended shaft head 2 extends out from inside the workpiece. Next, the positioning assembly 3 is installed. The positioning block 32 in the middle of the clamp plate 31 is aligned with the positioning groove 33, and the clamp plate 31 is pushed to fit against the outer surface of the workpiece. Then, the positioning bolt 35 is aligned with the pin groove 34 and screwed in. The positioning bolt 35 passes through the pin groove 34 on the surface of the clamp plate 31 and screws into the pre-drilled hole on the outer surface of the workpiece, thus locking the clamp plate 31 to the outer surface of the workpiece. The extension shaft head 2 is axially rigidly positioned to ensure the axial stability of the shaft body 1. In addition, two hoop rings 36 are snapped into the groove 39 at the connection between the extension shaft head 2 and the hoop plate 31. Each hoop ring 36 adopts a semi-circular design. The inner rings 38 on the inner side of the two semi-circular hoop rings 36 are aligned with the groove 39 and snapped in. At the same time, the slots 310 of the two hoop rings 36 are staggered with the slots 311. During installation, the slots 311 on one side are snapped into the slots 310 on the other side. In this way, the two hoop rings 36 are merged into a complete circular hoop using a tenon and mortise structure and snapped into the groove 39. The hoop rings 36 will tightly abut against the outer surface of the hoop plate 31 to achieve flexible pressing and limiting of the hoop plate 31, further enhancing the stability and reliability of the entire positioning structure.

[0045] Next, install the locking assembly 4. Align the screw 42 inside the round cap 41 with the threaded hole 43 at the end of the extension shaft head 2. Rotate the round cap 41 to screw the screw 42 into the threaded hole 43. At the same time, the round cap 41 is also fitted onto the outer surface of the extension shaft head 2. During the movement of the round cap 41, the sealing ring 44 on the inner wall of the round cap 41 will contact the inclined ring 37. As the movement continues, it will gradually slide along the outer surface of the inclined ring 37. The design of the inclined ring 37 makes the sealing ring 44 press against the outer surface of the hoop ring 36, thus achieving a sealing effect and preventing moisture from entering the connection between the workpiece and the shaft body 1, causing corrosion and improving the service life of the stepped shaft. In addition, after the round cap 41 is installed, its outer surface will fit against the side of the end of the positioning bolt 35, which can also limit the positioning bolt 35 and prevent the positioning bolt 35 from loosening during the subsequent movement of the workpiece, further improving the stability of the installation of the stepped shaft and the workpiece.

[0046] During subsequent use, the stepped shaft needs to be lubricated and maintained. Since a solid lubricant block 55 is installed inside the round cap 41 beforehand, during the maintenance stage, rotating the knob 51 on the outer surface of the end of the round cap 41 will cause the grinding disc 53 to rotate via the connecting plate 52. Because the connecting plate is slidably engaged inside the arc groove 54 and the two arc grooves 54 are not connected, the knob 51 needs to be rotated back and forth, which will cause the grinding disc 53 to rotate rapidly back and forth. First, the grinding disc 53 is in contact with the friction ring 58. The rotation of the grinding disc 53 will cause relative sliding with the friction ring 58, and the friction between the two will generate heat. In addition, the grinding disc 53 will rub against the solid lubricant block 55 during rotation, scraping off the outer surface of the solid lubricant block 55. The solid lubricant block 55 is made of wax, and the frictional heat will melt the debris. After melting into a liquid, it will flow into the positioning groove 33 of the extension shaft head 2 inside the round cap 41. Inside, the oil flows along channel 510. The outlet at the other end of channel 510 is located at the high and low joint of the stepped shaft, thus lubricating the connection between the stepped shaft and the workpiece. At the same time, the lubricating oil also flows into the mounting groove 511 through the leakage hole 512 of channel 510 and mounting groove 511, thus lubricating the transmission key. Lubrication and maintenance can be achieved without disassembling any parts, and the lubrication range is large, covering the entire transmission connection of the stepped shaft, with good lubrication and maintenance effect and high efficiency. In addition, it should be noted that a storage groove 59 is provided on the side of the sealing ring 44. A spring 56 is placed inside the storage groove 59. The other end of the spring 56 pushes the pressure plate 57 to press against the solid lubricating block 55. As the solid lubricating block 55 is used and consumed, its volume will shrink, and the spring 56, in the compressed state, can push the pressure plate 57 in real time to press the solid lubricating block 55 against the grinding disc 53, ensuring the normal use of the solid lubricating block 55.

[0047] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An axial positioning structure for a high-nitrogen, chromium-manganese, non-magnetic stainless steel stepped shaft, characterized in that, Includes a shaft body (1), an extension shaft head (2) is fixedly connected to the end of the shaft body (1), a positioning component (3) is provided on the outer surface of the extension shaft head (2), a locking component (4) is provided at the end of the extension shaft head (2) away from the shaft body (1), and a protective component (5) is provided inside the locking component (4). The positioning component (3) includes a hoop plate (31) that is movably sleeved on the outer surface of the extension shaft head (2), a positioning groove (33) is provided on the outer surface of the extension shaft head (2), a hoop ring (36) is sleeved on the outer surface of the extension shaft head (2), and a slanted ring (37) is fixedly connected to the side of the hoop ring (36). The locking assembly (4) includes a round cap (41) disposed at the end of the extension shaft head (2), and a screw (42) is fixedly connected to the middle of the inner wall of the round cap (41).

2. The axial positioning structure of the high-nitrogen, chromium-manganese non-magnetic stainless steel stepped shaft according to claim 1, characterized in that, The positioning grooves (33) are arranged in a ring array along the outer surface of the extension shaft head (2). The inner wall of the hoop plate (31) is fixedly connected to a positioning block (32). The positioning block (32) is slidably engaged in the interior of the positioning groove (33). The outer surface of the hoop plate (31) is provided with a pin groove (34). The pin groove (34) is threadedly connected to a positioning bolt (35).

3. The axial positioning structure of the high-nitrogen, chromium-manganese non-magnetic stainless steel stepped shaft according to claim 1, characterized in that, The hoop (36) adopts a semi-circular ring structure design and has two. One end of the two hoop (36) is provided with a locking block (311), and the other end is provided with a locking groove (310). The locking block (311) is engaged inside the locking groove (310).

4. The axial positioning structure of the high-nitrogen, chromium-manganese non-magnetic stainless steel stepped shaft according to claim 1, characterized in that, The outer surface of the extension shaft head (2) is provided with a groove (39), and an inner ring (38) is fixedly connected to the inner side of the hoop (36). The inner ring (38) is engaged in the inside of the groove (39), and the hoop (36) abuts against the outer surface of the hoop plate (31).

5. The axial positioning structure of the high-nitrogen, chromium-manganese non-magnetic stainless steel stepped shaft according to claim 1, characterized in that, The end of the extension shaft head (2) is provided with a threaded hole (43), the screw (42) is threaded into the inside of the threaded hole (43), the round cap (41) is sleeved on the outer surface of the extension shaft head (2), the outer surface of the round cap (41) is attached to the outer surface of the positioning bolt (35), and a sealing ring (44) is fixedly connected to the inner wall of the round cap (41), and the sealing ring (44) is abutted against the outer surface of the hoop (36).

6. The axial positioning structure of the high-nitrogen, chromium-manganese non-magnetic stainless steel stepped shaft according to claim 1, characterized in that, The protective component (5) includes an arc-shaped groove (54) formed on the outer surface of the round cap (41). A connecting plate (52) is slidably engaged inside the arc-shaped groove (54). A grinding disc (53) is fixedly connected to one end of the connecting plate (52) that extends into the round cap (41). A solid lubricating block (55) is provided inside the round cap (41). The outer surface of the grinding disc (53) abuts against the outer surface of the solid lubricating block (55).

7. The axial positioning structure of the high-nitrogen, chromium-manganese non-magnetic stainless steel stepped shaft according to claim 6, characterized in that, A knob (51) is fixedly connected to one end of the connecting plate (52) extending out of the round cap (41), and two arc-shaped grooves (54) are provided and are symmetrically arranged with respect to the center point of the round cap (41).

8. The axial positioning structure of the high-nitrogen, chromium-manganese non-magnetic stainless steel stepped shaft according to claim 7, characterized in that, A friction ring (58) is embedded in the inner wall of the round cap (41), and the side of the grinding disc (53) abuts against the outer surface of the friction ring (58). A pressure plate (57) is slidably connected to the inner wall of the round cap (41), and the outer surface of the pressure plate (57) abuts against the outer surface of the solid lubricating block (55). The pressure plate (57) and the grinding disc (53) clamp the two sides of the solid lubricating block (55).

9. The axial positioning structure of the high-nitrogen, chromium-manganese non-magnetic stainless steel stepped shaft according to claim 5, characterized in that, The outer surface of the sealing ring (44) is provided with a storage groove (59), and a spring (56) is provided inside the storage groove (59). One end of the spring (56) away from the storage groove (59) abuts against the outer surface of the pressure plate (57).

10. The axial positioning structure of the high-nitrogen, chromium-manganese, non-magnetic stainless steel stepped shaft according to claim 6, characterized in that, A channel (510) is provided at the connection between the shaft body (1) and the extension shaft head (2). The channel (510) passes through the middle of the shaft body (1). An installation groove (511) is provided on the outer surface of the shaft body (1). A drain hole (512) is provided through the inner wall of the installation groove (511). The drain hole (512) is connected to the channel (510).

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