Feeding device of lathe tailstock

Abstract

The utility model relates to the technical field of lathes, in particular to a feeding device of a lathe tailstock, which comprises a lathe body, and a sliding seat is slidably mounted above the lathe body. A first gear and a second gear are rotationally mounted on the upper side and the lower side in the cavity correspondingly, the first gear is meshed with the second gear, a transmission shaft is coaxially connected to the first gear through a key, and a hexagonal transmission groove is formed in the transmission shaft; the hexagonal transmission block is matched with the hexagonal transmission groove in an inserting manner; the motor drives the second gear and the first gear to rotate, the first gear drives the transmission shaft and the hexagonal transmission block to rotate, the hexagonal transmission block drives the threaded rod to rotate, along with rotation of the threaded rod, the sleeve can be driven to horizontally move, and under pushing of the sleeve, the drill bit is stably fed towards a machined workpiece; when the lathe tailstock is used, a worker does not need to rotate the hand wheel to achieve feeding, operation convenience is improved, and meanwhile the labor burden of the worker is relieved.

Description

Technical Field

[0001] This utility model relates to the field of lathe technology, specifically to a feed device for a lathe tailstock. Background Technology

[0002] The tailstock is one of the core functional components of a lathe, mainly used to support the workpiece or install tools (such as drills, reamers, centers, etc.) to ensure the stability and accuracy of the machining process. The main structural modules of the tailstock include the support base, sliding mechanism, clamping and driving device, and locking and buffering mechanism. During the use of the tailstock, the transmission mechanism is the core module for the tailstock to achieve feed.

[0003] Utility model patent CN202420113471.2 discloses a lathe tailstock with a buffer structure. This tailstock includes a buffer box located at the bottom of the tailstock body. A guide groove is formed on the top surface of the buffer box, and a connecting block is slidably disposed inside the guide groove. The lower side of the connecting block is disposed inside the buffer box, and the top surface of the connecting block is fixedly disposed on the bottom surface of the tailstock body. Connecting members are fixedly disposed at the four corners of the buffer box sidewall. This utility model provides a lathe tailstock with a buffer structure that can buffer the tailstock when unloading a workpiece, effectively preventing damage to the device and increasing its service life. This utility model has advantages such as reasonable design and low manufacturing cost.

[0004] Although the tailstock with a buffer structure can cushion the impact on the lathe tailstock, this device still has the following problems in practical use: In existing devices, the tailstock feed action relies entirely on manual operation of the handwheel by the operator. During machining, influenced by the machining process and procedures, the operator has to repeatedly perform forward and reverse handwheel operations. For example, in the process of precision turning shaft parts, the tailstock position needs to be constantly adjusted, resulting in an extremely high frequency of handwheel rotation. Prolonged exposure to this high-intensity operation not only causes continuous tension in the operator's arm muscles and exacerbates physical exertion, but also rapidly accumulates fatigue, significantly impacting work efficiency and machining accuracy. Therefore, we propose a feed device for the lathe tailstock. Utility Model Content

[0005] To solve the above problems, this utility model provides a feed device for a lathe tailstock.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A feed device for a lathe tailstock includes a bed, and a slide is slidably mounted on the top of the bed;

[0008] The mounting base is equipped with a tailstock above it. The tailstock includes a housing, and a sliding cavity is opened inside the housing. A sleeve is slidably installed in the sliding cavity, and a threaded hole is opened at the front end of the sleeve. A cover plate is installed at the front end of the housing, and a threaded rod is rotatably installed at the center of the cover plate. The rear end of the threaded rod passes through the sliding cavity and is threadedly connected to the threaded hole. A hexagonal transmission block is coaxially keyed at the front end of the threaded rod. A support is fixedly connected to the slide at the bottom of the tailstock.

[0009] The front side of the tailstock is provided with a transmission part, which includes a housing. The bottom of the housing has a cavity, and a mounting plate is fixed to the bottom of the housing. A first gear and a second gear are rotatably installed on the upper and lower sides of the cavity, respectively, and the first gear and the second gear mesh with each other. A drive shaft is coaxially keyed to the first gear, and a hexagonal drive groove is provided on the drive shaft. The end of the drive shaft passes through the outer wall of the housing and is rotatably connected to the housing. The hexagonal drive block is inserted into the hexagonal drive groove. A motor for driving the second gear is installed on the front end face of the housing.

[0010] Furthermore, a mounting base is fixed to the top front side of the slide block. The front end face of the mounting base is open, and a mounting groove is provided above the front end face of the mounting base. Slots are provided at both ends of the opening on the front end face of the mounting base. Fixing bolts are threaded to both ends of the top of the mounting base. Both ends of the mounting plate are inserted into the slots, and the box body is inserted into the mounting groove. Fixing holes are provided at both ends of the top of the mounting plate, and the ends of the fixing bolts are inserted into the fixing holes.

[0011] Furthermore, a limiting block is fixed at the bottom center of the mounting plate, and a limiting groove is opened at the top front end of the slide. The cross-sectional shape of both the limiting block and the limiting groove is trapezoidal, and the limiting block and the limiting groove are inserted into each other.

[0012] Furthermore, the bottom of the slide has two sliding grooves, and the top of the bed has two sliders fixed thereon, with the sliding grooves and sliders slidably connected.

[0013] Furthermore, locking bolts are threaded onto both the left and right side walls of the slide block, with the ends of the locking bolts abutting against the outer wall of the slide block.

[0014] Furthermore, the rear end of the sleeve is provided with a variable diameter sleeve hole, and the cross-sectional shape of the variable diameter sleeve hole is conical.

[0015] Furthermore, a guide rail is fixed at the bottom of the sliding cavity, and a guide groove is provided at the bottom of the sleeve to slide and connect with the guide rail.

[0016] Furthermore, the support has a trapezoidal cross-sectional shape, and the upper and lower ends of the support are fixedly connected to the slide and the outer shell by bolts.

[0017] Furthermore, connecting bolts are provided at all four corners of the cover plate, and the connecting bolts are threadedly connected to the outer shell.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] 1. Through the tailstock and transmission unit: the motor drives the second gear and the first gear to rotate, the first gear drives the transmission shaft and the hexagonal transmission block to rotate, and the hexagonal transmission block drives the threaded rod to rotate. As the threaded rod rotates, it can drive the sleeve to move horizontally. Under the push of the sleeve, the drill bit is smoothly fed towards the workpiece to realize drilling, milling and other machining operations. The tailstock of this lathe does not require the operator to turn the handwheel to feed, which improves the convenience of operation and reduces the workload of the operator.

[0020] 2. With the installation base, fixing bolts and hexagonal transmission groove, the transmission part can be directly disassembled when lubrication or maintenance of the threaded rod and other structures inside the tailstock is required. The inside of the outer shell can also be maintained by removing the cover plate. This design facilitates the maintenance of the internal structural components of the tailstock in the later stages through the detachable modular design. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a partial structural cross-sectional view of the present invention;

[0023] Figure 3 This is a schematic diagram of the slide block structure in this utility model;

[0024] Figure 4 This is a partial exploded structural diagram of the tailstock in this utility model;

[0025] Figure 5 This is a partial exploded structural diagram of the transmission part in this utility model;

[0026] Figure 6 This is a partial structural diagram of the transmission part in this utility model;

[0027] In the picture:

[0028] 1. Bed frame; 10. Sliding block;

[0029] 2. Slide; 20. Slide groove; 21. Limiting groove; 22. Locking bolt; 23. Mounting base; 230. Mounting groove; 231. Slot; 232. Fixing bolt;

[0030] 3. Tailstock; 30. Housing; 300. Slide cavity; 301. Guide rail; 31. Sleeve; 310. Variable diameter sleeve hole; 311. Threaded hole; 32. Support; 33. Threaded rod; 34. Cover plate; 340. Connecting bolt; 35. Hexagonal transmission block;

[0031] 4. Transmission unit; 40. Box body; 400. Cavity; 41. Mounting plate; 410. Fixing hole; 42. Limiting block; 43. First gear; 44. Transmission shaft; 440. Hexagonal transmission groove; 45. Second gear; 46. Motor. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] This embodiment provides a technical solution:

[0034] Please see Figure 1 , Figure 2 , Figure 4 and Figure 6 As shown, a feed device for a lathe tailstock includes a bed 1, a slide 2 slidably mounted on top of the bed 1; a tailstock 3 is provided above a mounting base 23, the tailstock 3 includes a housing 30, a sliding cavity 300 is formed inside the housing 30, a sleeve 31 is slidably mounted in the sliding cavity 300, and a threaded hole 311 is formed at the front end of the sleeve 31; a cover plate 34 is mounted at the front end of the housing 30, a threaded rod 33 is rotatably mounted at the center of the cover plate 34, the rear end of the threaded rod 33 passes through the sliding cavity 300 and is threadedly connected to the threaded hole 311, and a hexagonal transmission block 35 is coaxially keyed to the front end of the threaded rod 33; a support 32 fixedly connected to the slide 2 is fixedly mounted at the bottom of the tailstock 3; the tailstock 3... The front side is provided with a transmission part 4, which includes a box body 40. A cavity 400 is opened at the bottom of the box body 40, and a mounting plate 41 is fixed at the bottom of the box body 40. A first gear 43 and a second gear 45 are rotatably installed on the upper and lower sides of the cavity 400, respectively, and the first gear 43 and the second gear 45 mesh with each other. A transmission shaft 44 is coaxially keyed to the first gear 43. A hexagonal transmission groove 440 is opened at the transmission shaft 44. The end of the transmission shaft 44 passes through the outer wall of the box body 40 and is rotatably connected to the box body 40. A hexagonal transmission block 35 is inserted into the hexagonal transmission groove 440. A motor 46 for driving the second gear 45 to rotate is installed on the front end face of the box body 40.

[0035] Please see Figure 3 and Figure 5As shown, a mounting base 23 is fixed to the top front side of the slide 2. The mounting base 23 is fixedly connected to the slide 2 by bolts. The front end face of the mounting base 23 is open, and a mounting groove 230 is provided above the front end face of the mounting base 23. Slots 231 are provided at both ends of the opening on the front end face of the mounting base 23. Fixing bolts 232 are threaded to both ends of the top of the mounting base 23. Both ends of the mounting plate 41 are inserted into the slots 231, and the box body 40 is inserted into the mounting groove 230. Fixing holes 410 are provided at both ends of the top of the mounting plate 41, and the ends of the fixing bolts 232 are inserted into the fixing holes 410. The above configuration facilitates the disassembly and assembly of the transmission part 4, and this design facilitates the maintenance of the tailstock 3 and the transmission part 4.

[0036] In this embodiment, a limiting block 42 is fixed at the bottom center of the mounting plate 41, and a limiting groove 21 is formed at the top front end of the slide block 2. The cross-sectional shapes of both the limiting block 42 and the limiting groove 21 are trapezoidal, and the limiting block 42 and the limiting groove 21 are interlocked. The trapezoidal cross-section design achieves a self-locking effect, effectively preventing the mounting plate 41 from shifting laterally under vibration or load, thereby improving structural stability.

[0037] In this embodiment, two grooves 20 are formed at the bottom of the slide block 2, and two sliders 10 are fixed at the top of the bed 1. The grooves 20 and the sliders 10 are slidably connected. The double groove design enhances the smoothness of the movement of the slide block 2 relative to the bed 1 and reduces the risk of single-point wear; the symmetrically arranged sliders 10 provide balanced force, which is conducive to achieving high-precision linear motion.

[0038] In this embodiment, locking bolts 22 are threaded onto both the left and right side walls of the slide block 2, with the ends of the locking bolts 22 abutting against the outer wall of the slider 10. This design facilitates the stable fixing of the slide block 2 onto the bed 1, thus achieving the locking of the slide block 2's position.

[0039] In this embodiment, the rear end of the sleeve 31 is provided with a variable diameter sleeve hole 310, and the cross-sectional shape of the variable diameter sleeve hole 310 is conical. The conical structure facilitates the quick centering and positioning of the workpiece or tool, reducing assembly errors; the variable diameter design is compatible with shaft parts of different diameters, expanding the applicability of functions, while the conical surface contact can improve clamping stability.

[0040] In this embodiment, a guide rail 301 is fixed at the bottom of the sliding cavity 300, and a guide groove that slides and connects with the guide rail 301 is provided at the bottom of the sleeve 31. This design limits the movement of the sleeve 31 and prevents it from rotating under the rotation of the threaded rod 33.

[0041] In this embodiment, the support 32 has a trapezoidal cross-sectional shape, and its upper and lower ends are fixedly connected to the slide 2 and the outer shell 30 by bolts. The trapezoidal support 32 provides a more stable support for the outer shell 30, while the bolt fixing method ensures the stability and reliability of the installation.

[0042] In this embodiment, connecting bolts 340 are provided at each of the four corners of the cover plate 34, and the connecting bolts 340 are threadedly connected to the outer casing 30. The threaded connection facilitates the maintenance of the internal components of the outer casing 30, while also enhancing the sealing performance and preventing leakage of lubricating medium.

[0043] It should be added that the cross-sectional shape of the hexagonal transmission block 35 and the hexagonal transmission groove 440 is a regular hexagon. The regular hexagonal cross-section transmits torque through six sets of evenly distributed contact surfaces. Compared with the traditional square or keyway structure, the contact area is increased by about 15%, which significantly reduces the stress per unit area. This design ensures the stability and efficiency of the transmission, so that the second gear 45 can stably drive the threaded rod 33 to rotate.

[0044] It is worth noting that the motor 46 involved in this embodiment is a conventional technology and will not be described in detail here.

[0045] In practical use, the user first turns on the power to the motor 46, and the motor 46 starts to work. The output shaft of the motor 46 rotates, driving the second gear 45 to rotate. Since the second gear 45 meshes with the first gear 43, the first gear 43 rotates and drives the transmission shaft 44 to rotate. Since the hexagonal transmission block 35 and the hexagonal transmission groove 440 are inserted and matched, the transmission shaft 44 drives the hexagonal transmission block 35 and the threaded rod 33 to rotate. Since the threaded rod 33 is threadedly connected to the threaded hole 311, the sleeve 31 moves horizontally. The sleeve 31 pushes the drill bit to feed smoothly toward the workpiece.

[0046] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A feed device for a lathe tailstock, characterized in that: Includes a bed frame (1), and a slide seat (2) is slidably installed on the top of the bed frame (1); A tailstock (3) is provided above the mounting base (23). The tailstock (3) includes a housing (30). A sliding cavity (300) is provided inside the housing (30). A sleeve (31) is slidably installed in the sliding cavity (300). A threaded hole (311) is provided at the front end of the sleeve (31). A cover plate (34) is installed at the front end of the housing (30). A threaded rod (33) is rotatably installed at the center of the cover plate (34). The rear end of the threaded rod (33) passes through the sliding cavity (300) and is threadedly connected to the threaded hole (311). A hexagonal transmission block (35) is coaxially keyed at the front end of the threaded rod (33). A support (32) is fixedly connected to the slide (2) at the bottom of the tailstock (3). The front side of the tailstock (3) is provided with a transmission part (4), which includes a box (40). The bottom of the box (40) is provided with a cavity (400), and a mounting plate (41) is fixed to the bottom of the box (40). A first gear (43) and a second gear (45) are rotatably installed in the cavity (400) at the upper and lower sides respectively, and the first gear (43) and the second gear (45) mesh with each other. A transmission shaft (44) is coaxially keyed to the first gear (43). A hexagonal transmission groove (440) is provided at the transmission shaft (44). The end of the transmission shaft (44) passes through the outer wall of the box (40) and is rotatably connected to the box (40). A hexagonal transmission block (35) is inserted into the hexagonal transmission groove (440). A motor (46) for driving the second gear (45) to rotate is installed on the front end face of the box (40).

2. The feed device for a lathe tailstock according to claim 1, characterized in that: A mounting base (23) is fixed at the top front side of the slide (2). The front end face of the mounting base (23) is open. A mounting groove (230) is provided above the front end face of the mounting base (23). Slots (231) are provided at both ends of the opening on the front end face of the mounting base (23). Fixing bolts (232) are threaded to both ends of the top of the mounting base (23). Both ends of the mounting plate (41) are inserted into the slots (231), and the box (40) is inserted into the mounting groove (230). Fixing holes (410) are provided at both ends of the top of the mounting plate (41), and the ends of the fixing bolts (232) are inserted into the fixing holes (410).

3. The feed mechanism for a lathe tailstock of claim 1 wherein: A limiting block (42) is fixed at the bottom center of the mounting plate (41), and a limiting groove (21) is opened at the top front end of the slide (2). The cross-sectional shape of the limiting block (42) and the limiting groove (21) are both trapezoidal, and the limiting block (42) and the limiting groove (21) are inserted into each other.

4. The feed mechanism for a lathe tailstock of claim 1 wherein: The bottom of the slide (2) has two slide grooves (20), and the top of the bed (1) has two sliders (10), which are slidably connected to the slide grooves (20) and the sliders (10).

5. The feed mechanism for a lathe tailstock of claim 1 wherein: The left and right sides of the slide block (2) are threaded with locking bolts (22), and the ends of the locking bolts (22) abut against the outer wall of the slider (10).

6. The feed mechanism for a lathe tailstock of claim 1 wherein: The sleeve (31) has a variable diameter sleeve hole (310) at its rear end, and the cross-sectional shape of the variable diameter sleeve hole (310) is conical.

7. The feed mechanism for a lathe tailstock of claim 1 wherein: The bottom of the sliding cavity (300) is fixed with a guide rail (301), and the bottom of the sleeve (31) is provided with a guide groove in sliding connection with the guide rail (301).

8. The feed mechanism for a lathe tailstock of claim 1 wherein: The cross section of the support (32) is trapezoidal, and the upper and lower ends of the support (32) are fixedly connected with the sliding seat (2) and the shell (30) through bolts.

9. The feed mechanism for a lathe tailstock of claim 1 wherein: The four corners of the cover plate (34) are provided with connecting bolts (340), and the connecting bolts (340) are in threaded connection with the shell (30).

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