Pipe expanding mechanism of lathe tailstock system

Abstract

The utility model discloses a lathe tailstock system pipe expanding mechanism, which relates to the technical field of lathe processing, and comprises a tailstock body, a driving mechanism is arranged in the tailstock body, a center mechanism is arranged on the left side of the driving mechanism, the center mechanism comprises an extrusion assembly, the extrusion assembly comprises a connecting plate, and the connecting plate is provided with a clamping groove. The left end of the connecting plate is fixedly connected with a sliding rod, the left end of the sliding rod is fixedly connected with a conical extrusion head, and the right end of the connecting plate is fixedly connected with a rectangular block. According to the pipe expanding mechanism of the lathe tailstock system, when a conical extrusion head in an extrusion assembly makes contact with an arc-shaped inclined block, the arc-shaped inclined block is extruded outwards, so that a top plate is expanded outwards, at the moment, the top plate extrudes the inner wall of a pipe part, the pipe part is supported, and when a shaft part is supported, the inner wall of the shaft part is extruded by the top plate. And the ejector pin block is directly aligned to the center of the shaft part, so that the practicability of the lathe tailstock is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lathe processing, in particular to a tube expanding mechanism of a lathe tailstock system. Background Art

[0002] The lathe tailstock is an important part of the lathe. It is located at the tail end of the lathe bed. It can install a center to support long shaft parts, ensure stability and concentricity during processing. At the same time, it can provide auxiliary support for heavier or longer-extending parts, reducing vibration and deformation during processing.

[0003] In the prior art, as the Chinese patent number: CN219292772U discloses a lathe tailstock center, which includes a lathe tailstock and a mounting sleeve. An activity cavity is opened in the lathe tailstock. The lathe tailstock is connected with a motor. The output end of the motor extends into the activity cavity and is connected with a transmission mechanism. The transmission mechanism is connected with a push rod. The push rod is connected with a connection mechanism that can reduce friction. The connection mechanism is connected with a conical block. The conical block abuts against the processed part. The connection mechanism can reduce the force of the rotation of the conical block transmitted to the push rod, reduce the force received by the subsequent push rod, and reduce internal damage.

[0004] Based on the above prior art, there are still the following problems with the current lathe tailstock. In the traditional form of the lathe tailstock, its support method usually only relies on the center to support shaft parts. However, when facing some tube parts, it is often difficult to achieve an ideal support effect, thus reducing the practicality of the lathe tailstock in actual production and processing. Therefore, the utility model provides a tube expanding mechanism of a lathe tailstock system. Summary of the Utility Model

[0005] Aiming at the deficiencies of the prior art, the utility model provides a tube expanding mechanism of a lathe tailstock system, which solves the problem that it is often difficult to achieve an ideal support effect when facing some tube parts.

[0006] To achieve the above purposes, the utility model is realized through the following technical solutions: A tube expanding mechanism of a lathe tailstock system includes a tailstock body. A driving mechanism is arranged inside the tailstock body. A center mechanism is arranged on the left side of the driving mechanism. The center mechanism includes:

[0007] An extrusion assembly, the extrusion assembly includes a connecting plate. A sliding rod is fixedly connected to the left end of the connecting plate. A conical extrusion head is fixedly connected to the left end of the sliding rod. A rectangular block is fixedly connected to the right end of the connecting plate;

[0008] Fixing component, the fixing component includes a fixing plate movably sleeved on the outer wall of the sliding rod, the left end of the fixing plate is fixedly connected with a thimble shaft, a plurality of rectangular grooves are formed on the outer wall of the thimble shaft, a round hole is formed through the inner wall of each rectangular groove, a cylindrical rod is movably arranged inside the round hole, and a top plate is fixedly connected to the outer end of the cylindrical rod facing the outside.

[0009] Preferably, a sliding hole is formed on the outer surface of the tailstock body, and a plurality of limiting bumps are arranged on the inner wall of the sliding hole.

[0010] Preferably, the driving mechanism includes a motor fixedly installed on the right side of the tailstock body, the output end of the motor movably penetrates through the outer surface of the tailstock body and extends into the sliding hole, a lead screw is fixedly installed at the output end of the motor, a threaded barrel slidably arranged on the inner wall of the sliding hole is threadedly sleeved on the outer surface of the lead screw, a plurality of limiting grooves matched with the limiting bumps are formed on the outer surface of the threaded barrel, a connecting head is arranged at the left end of the threaded barrel, and the connecting head is detachably installed on the surface of the rectangular block through a bolt.

[0011] Preferably, a plurality of limiting blocks are fixedly installed at the right end of the fixing plate, a plurality of guide rods are also fixedly installed at the right end of the fixing plate, and the outer walls of the guide rods movably penetrate through the end face of the connecting plate and extend to the other side. A first spring that generates a thrust on the connecting plate is sleeved on the outer part of the guide rod, and both ends of the first spring are fixedly connected to the opposite side end faces of the fixing plate and the connecting plate respectively.

[0012] Preferably, a plurality of second springs that generate a pulling force on the top plate are fixedly installed on the inner wall of the rectangular groove. Guide grooves are symmetrically formed on the outer wall of the cylindrical rod, and guide protrusions for guiding the guide grooves are arranged on the inner wall of the round hole. An arc-shaped inclined block is fixedly connected to the inner end of the cylindrical rod facing the inside. A cylindrical hole for accommodating the conical extrusion head and the arc-shaped inclined block is formed at the end of the thimble shaft, and a thimble block is fixedly installed at the left end of the thimble shaft.

[0013] Preferably, an oil injection port is formed on the outer surface of the tailstock body, a sealing cover is threadedly arranged at the orifice of the oil injection port, an oil passage communicated with the oil injection port is formed inside the tailstock body, and a plurality of capillary pores communicated with the sliding hole are formed on the inner wall of the oil passage.

[0014] Beneficial effects

[0015] The utility model provides an expansion tube mechanism for a lathe tailstock system. Compared with the prior art, the following beneficial effects are achieved:

[0016] (1). The tube expanding mechanism of the tailstock system of this lathe drives the tip mechanism to move to the left by operating the driving mechanism. When the left end of the fixed plate contacts the end of the tubular part, the fixed plate can no longer move to the left, and then the entire fixed component cannot move, while the extrusion component continues to move. When the conical extrusion head in the extrusion component contacts the arc-shaped inclined block, it will extrude the arc-shaped inclined block outward, so that the top plate expands outward. At this time, the top plate extrudes the inner wall of the tubular part, thus playing a role in supporting the tubular part. Moreover, when supporting the shaft part, directly align the thimble block with the center of the shaft part, thus effectively improving the practicality of the lathe tailstock.

[0017] (2). The tube expanding mechanism of the tailstock system of this lathe adds an appropriate amount of lubricating oil through the oil filling port by opening the sealing cover, and distributes it evenly to all the capillary pores through the oil channel and finally enters the sliding hole, so as to lubricate the relevant precision moving parts in the sliding hole, reduce the mutual wear between the moving parts, and thus improve the service life of the device. Brief Description of the Drawings

[0018] Figure 1 is a three-dimensional external view schematic diagram of the present utility model;

[0019] Figure 2 is a cross-sectional view of the tailstock body of the present utility model;

[0020] Figure 3 is a three-dimensional external view schematic diagram of the driving mechanism of the present utility model;

[0021] Figure 4 is a three-dimensional external view schematic diagram of the tip mechanism of the present utility model.

[0022] In the figure: 1. Tailstock body; 11. Oil filling port; 12. Sealing cover; 13. Oil channel; 14. Capillary pore; 15. Sliding hole; 16. Limit convex block; 2. Driving mechanism; 21. Motor; 22. Lead screw; 23. Threaded cylinder; 24. Limit groove; 25. Connector; 3. Tip mechanism; 31. Extrusion component; 311. Connecting plate; 312. Rectangular block; 313. Slide bar; 314. Conical extrusion head; 32. Fixed component; 321. Thimble shaft; 322. Cylindrical hole; 323. Thimble block; 324. Fixed plate; 325. Limit block; 326. Guide rod; 327. First spring; 328. Rectangular groove; 329. Round hole; 3210. Guide rib; 3211. Cylindrical rod; 3212. Guide groove; 3213. Top plate; 3214. Arc-shaped inclined block; 3215. Second spring. Detailed Description of the Embodiment

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0024] The present invention provides two technical solutions:

[0025] Figures 1 - 4 The first implementation manner is shown: the tube expanding mechanism of the lathe tailstock system includes a tailstock body 1, a driving mechanism 2 is arranged inside the tailstock body 1, and a center mechanism 3 is arranged on the left side of the driving mechanism 2. The center mechanism 3 includes:

[0026] An extrusion assembly 31, the extrusion assembly 31 includes a connecting plate 311, a slide rod 313 is fixedly connected to the left end of the connecting plate 311, a conical extrusion head 314 is fixedly connected to the left end of the slide rod 313, and a rectangular block 312 is fixedly connected to the right end of the connecting plate 311;

[0027] A fixing assembly 32, the fixing assembly 32 includes a fixing plate 324 movably sleeved on the outer wall of the slide rod 313, a center shaft 321 is fixedly connected to the left end of the fixing plate 324, a plurality of rectangular grooves 328 are formed on the outer wall of the center shaft 321, a round hole 329 is penetrated through the inner wall of each rectangular groove 328, a cylindrical rod 3211 is movably arranged inside the round hole 329, a top plate 3213 is fixedly connected to the outer end of the cylindrical rod 3211 facing the outside. When the fixing plate 324 moves to the left and its left end contacts the end of the pipe-like part, the fixing plate 324 can no longer move to the left, and then the whole fixing assembly 32 cannot move, while the extrusion assembly 31 continues to move. When the conical extrusion head 314 in the extrusion assembly 31 contacts the arc-shaped inclined block 3214, the arc-shaped inclined block 3214 will be extruded outward, so that the top plate 3213 expands outward. At this time, the top plate 3213 extrudes the inner wall of the pipe-like part, thereby playing a role in supporting the pipe-like part.

[0028] A slide hole 15 is formed on the outer surface of the tailstock body 1, and a plurality of limiting protrusions 16 are arranged on the inner wall of the slide hole 15.

[0029] The driving mechanism 2 includes a motor 21 fixedly installed on the right side of the tailstock body 1. The output end of the motor 21 movably penetrates the outer surface of the tailstock body 1 and extends into the sliding hole 15. A lead screw 22 is fixedly installed at the output end of the motor 21. A threaded cylinder 23 is threadedly sleeved on the outer surface of the lead screw 22 and is slidably arranged on the inner wall of the sliding hole 15. A plurality of limiting grooves 24 that cooperate with the limiting bumps 16 are formed on the outer surface of the threaded cylinder 23. A connecting head 25 is arranged at the left end of the threaded cylinder 23, and the connecting head 25 is detachably installed on the surface of the rectangular block 312 through bolts. By starting the motor 21 to drive the lead screw 22 to rotate, the threaded cylinder 23 can be driven to slide left or right in the sliding hole 15. During the sliding process, the limiting bumps 16 cooperate with the limiting grooves 24 to prevent the threaded cylinder 23 from rotating during the sliding process, playing a guiding and limiting role.

[0030] A plurality of limiting blocks 325 are fixedly installed at the right end of the fixing plate 324. A plurality of guide rods 326 are also fixedly installed at the right end of the fixing plate 324. The outer walls of the guide rods 326 movably penetrate the end face of the connecting plate 311 and extend to the other side. A first spring 327 that generates a thrust on the connecting plate 311 is sleeved on the outer part of the guide rods 326. The two ends of the first spring 327 are fixedly connected to the opposite side end faces of the fixing plate 324 and the connecting plate 311 respectively. When the fixing plate 324 is externally squeezed, it will approach the connecting plate 311. In order to prevent the first spring 327 from being over-compressed, the limiting blocks 325 are provided so that the fixing plate 324 will not contact the connecting plate 311. The distance between the two also plays a role in protecting the first spring 327. Moreover, when the fixing plate 324 is displaced, the arranged guide rods 326 play a role in guiding and limiting the fixing plate 324 to improve its stability. At the same time, a limiting cap for preventing the connecting plate 311 from falling off is arranged at one end of the guide rod 326.

[0031] Figures 1 - 4The second implementation manner is shown. The main difference from the first implementation manner is that: a plurality of second springs 3215 that exert a pulling force on the top plate 3213 are fixedly installed on the inner wall of the rectangular groove 328. Guide grooves 3212 are symmetrically formed on the outer wall of the cylindrical rod 3211. Guide ridges 3210 for guiding the guide grooves 3212 are provided on the inner wall of the circular hole 329. An arc-shaped inclined block 3214 is fixedly connected to the inner end of the cylindrical rod 3211. A cylindrical hole 322 for accommodating the conical extrusion head 314 and the arc-shaped inclined block 3214 is formed at the end of the thimble shaft 321. A thimble block 323 is fixedly installed at the left end of the thimble shaft 321. When no external pressure is applied to the outside of the top plate 3213, the second spring 3215 can pull the top plate 3213 back into the rectangular groove 328. And when the entire tip mechanism 3 no longer supports any parts, under the thrust of the first spring 327, the conical extrusion head 314 moves away from the arc-shaped inclined block 3214 and no longer supports the arc-shaped inclined block 3214, thus satisfying the basic condition for the retraction of the top plate 3213.

[0032] An oil injection port 11 is formed on the outer surface of the tailstock body 1. A sealing cap 12 is threadedly arranged at the orifice of the oil injection port 11. An oil passage 13 communicating with the oil injection port 11 is formed inside the tailstock body 1. A plurality of capillary holes 14 communicating with the sliding holes 15 are formed on the inner wall of the oil passage 13. By opening the sealing cap 12, an appropriate amount of lubricating oil is added through the oil injection port 11, and is evenly distributed into all the capillary holes 14 through the oil passage 13 and finally enters the sliding holes 15, so as to lubricate the relevant precision moving parts in the sliding holes 15.

[0033] Meanwhile, the content not detailedly described in this specification belongs to the prior art well-known to those skilled in the art.

[0034] During use, the pipe-like part is sleeved on the thimble shaft 321, and the driving mechanism 2 is operated to push the center mechanism 3 to move to the left. When the left end of the fixing plate 324 contacts the end of the pipe-like part, the fixing plate 324 can no longer move to the left, and then the entire fixing assembly 32 cannot move, while the pressing assembly 31 continues to move. When the conical pressing head 314 in the pressing assembly 31 contacts the arc-shaped inclined block 3214, the arc-shaped inclined block 3214 will be extruded outward, so that the top plate 3213 expands outward. At this time, the top plate 3213 presses the inner wall of the pipe-like part, so as to play a role in supporting the pipe-like part. When supporting the shaft-like part, the thimble block 323 is directly aligned with the center of the shaft-like part, thus effectively improving the practicability of the lathe tailstock. By opening the sealing cover 12, an appropriate amount of lubricating oil is added from the oil filling port 11, and is evenly distributed to all the capillary holes 14 through the oil passage 13 and finally enters the sliding hole 15, so as to lubricate the relevant precision moving parts in the sliding hole 15, reduce the mutual wear between the moving parts, and thus improve the service life of the device. By removing the connecting bolts between the connecting head 25 and the rectangular block 312, it is convenient to maintain or replace the entire center mechanism 3 in the later stage.

[0035] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0036] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tube expansion mechanism for a lathe tailstock system, comprising a tailstock body (1), characterized in that: A driving mechanism (2) is arranged inside the tailstock body (1), and a centering mechanism (3) is arranged on the left side of the driving mechanism (2). The centering mechanism (3) comprises: An extrusion assembly (31), the extrusion assembly (31) comprising a connecting plate (311), the left end of the connecting plate (311) being fixedly connected to a sliding rod (313), the left end of the sliding rod (313) being fixedly connected to a conical extrusion head (314), and the right end of the connecting plate (311) being fixedly connected to a rectangular block (312); A fixing assembly (32), the fixing assembly (32) comprising a fixing plate (324) movably sleeved on the outer wall of the sliding rod (313), the left end of the fixing plate (324) being fixedly connected to a pintle shaft (321), the outer wall of the pintle shaft (321) being provided with a plurality of rectangular grooves (328), the inner wall of each of the rectangular grooves (328) being penetrated by a circular hole (329), a cylindrical rod (3211) being movably arranged inside the circular hole (329), and the outer end of the cylindrical rod (3211) being fixedly connected to a pintle shaft (3213).

2. The tube expansion mechanism of the lathe tailstock system according to claim 1, characterized in that: The outer surface of the tailstock body (1) is provided with a sliding hole (15), and the inner wall of the sliding hole (15) is provided with a plurality of limiting protrusions (16).

3. The tube expansion mechanism of the lathe tailstock system according to claim 2, characterized in that: The driving mechanism (2) comprises a motor (21) fixedly mounted on the right side of the tailstock body (1); the output end of the motor (21) movably penetrates the outer surface of the tailstock body (1) and extends into the interior of the sliding hole (15); a screw rod (22) is fixedly mounted on the output end of the motor (21); a threaded barrel (23) slidably arranged in the inner wall of the sliding hole (15) is threadedly sleeved on the outer surface of the screw rod (22); a plurality of limiting grooves (24) matching with the limiting protrusions (16) are formed on the outer surface of the threaded barrel (23); a connector (25) is arranged at the left end of the threaded barrel (23); and the connector (25) is detachably mounted on the surface of the rectangular block (312) by means of bolts.

4. The tube expansion mechanism for the lathe tailstock system according to claim 1, characterized in that: A plurality of limit blocks (325) are fixedly mounted on the right end of the fixed plate (324), and a plurality of guide rods (326) are also fixedly mounted on the right end of the fixed plate (324), and the outer wall of the guide rod (326) movably penetrates the end surface of the connecting plate (311) and extends to the other side, and a first spring (327) for generating a thrust force on the connecting plate (311) is sleeved on the outside of the guide rod (326), and the two ends of the first spring (327) are respectively fixedly connected to the end surfaces of the fixed plate (324) and the connecting plate (311) on opposite sides.

5. The tube expansion mechanism of the lathe tailstock system according to claim 1, characterized in that: A plurality of second springs (3215) for generating pulling force on the ejector plate (3213) are fixedly mounted on the inner wall of the rectangular groove (328); guide grooves (3212) are symmetrically formed on the outer wall of the cylindrical rod (3211); a guide ridge (3210) for guiding the guide grooves (3212) is provided on the inner wall of the circular hole (329); an arc-shaped inclined block (3214) is fixedly connected to one end of the cylindrical rod (3211) facing inward; a cylindrical hole (322) for accommodating a conical extrusion head (314) and an arc-shaped inclined block (3214) is formed at the end of the ejector shaft (321); and an ejector block (323) is fixedly mounted on the left end of the ejector shaft (321).

6. The tube expansion mechanism of the lathe tailstock system according to claim 2, characterized in that: The outer surface of the tailstock body (1) is provided with an oil filling port (11), a sealing cover (12) is threadedly arranged at the opening of the oil filling port (11), an oil passage (13) connected to the oil filling port (11) is provided inside the tailstock body (1), and a plurality of capillary holes (14) connected to the sliding hole (15) are provided on the inner wall of the oil passage (13).

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