Hydraulic tail top structure

Abstract

The utility model relates to processing machine tool technical field, concretely relates to a hydraulic tail top structure, including tailstock, tail center, thin type oil cylinder and locking mechanism, the top of tailstock is set in the outside of tail center, tail center and tailstock sliding connection, locking mechanism sets up in one side of tail center and is contacted with tail center, the fixed end of thin type oil cylinder is connected with the tail end of tailstock, and the output end of thin type oil cylinder extends to tailstock and is connected with the tail end of tail center, discard through spring and provide the top tight force, adopt the mode of hydraulic and push tail center to realize the top tight of work piece, improve the life, and can adjust the top tight force according to the operation demand, satisfy the top tight demand of different work piece, and the top tight force is more stable and reliable, reduce the noise produced when processing, guarantee the reliability of tail top.

Description

Technical Field

[0001] This utility model relates to the field of machine tool technology, specifically to a hydraulic tailstock structure. Background Technology

[0002] When machining radial holes in shaft gears, hydraulic clamps often use a double-center positioning method to hold the workpiece.

[0003] Traditional tailstock mechanisms often use springs to provide preload. For example, Chinese utility model patent CN217393776U provides a tailstock for a machine tool, including a base. A first sleeve is provided on the base, and a second sleeve is detachably connected inside the first sleeve. A first elastic element is provided inside the second sleeve. The movable end of the first elastic element is fixedly connected to a center point that is dynamically sealed to the second sleeve. One end of the second sleeve is threadedly connected to an adjusting column for adjusting the elastic force of the first elastic element.

[0004] However, this structure has the following drawbacks: 1) Springs are prone to fatigue failure, leading to unstable preload; 2) High-frequency motion is prone to generating vibration noise; 3) Complex structure and high maintenance costs; 4) When the spring fails, disassembly and replacement are very difficult, resulting in a waste of time and manpower.

[0005] Therefore, it cannot meet the actual operational needs. Utility Model Content

[0006] The purpose of this invention is to provide a hydraulic tailstock structure to solve the technical problem of insufficient reliability of the springs currently used in tailstocks.

[0007] The solution of this utility model to the above-mentioned technical problems is as follows: A hydraulic tailstock structure includes a tailstock, a center, a thin-walled cylinder, and a locking mechanism. The top of the tailstock is sleeved on the outside of the center, and the center is slidably connected to the tailstock. The locking mechanism is located on one side of the center and contacts the center. The fixed end of the thin-walled cylinder is connected to the tail end of the tailstock, and the output end of the thin-walled cylinder extends into the tailstock and is connected to the tail end of the center.

[0008] Further specified, a sleeve is fitted on the outer side of the tip, the tip and the sleeve are detachably connected, the tailstock is fitted on the outer side of the sleeve, the tip and the tailstock are slidably connected through the sleeve, and the output end of the thin-walled cylinder is connected to the tail end of the sleeve.

[0009] Further specified, the sleeve is provided with a cover plate at its tail end, the output end of the thin cylinder is provided with a cylinder rod, the cylinder rod is detachably connected to the cover plate, and the cover plate is detachably connected to the tail end of the sleeve.

[0010] Further, the outer surface of the sleeve is provided with a transverse limiting groove, the transverse limiting groove is arranged along the axis of the sleeve, and the tailstock is provided with a first limiting post, the bottom of the first limiting post extending through the tailstock into the transverse limiting groove.

[0011] Further specified, a top removable sleeve is provided on the top tip, the top removable sleeve is located on the outside of the tailstock, and the top removable sleeve is close to the head end of the top tip.

[0012] Further defining the locking mechanism, the locking mechanism includes a locking rod, a locking hydraulic cylinder, and a pressure plate. The top of the locking rod is located above the tailstock, and the bottom of the locking rod extends into the tailstock. The locking rod is movably connected to the tailstock and contacts the circumference of the sleeve. The fixed end of the locking hydraulic cylinder is connected to the outer side of the tailstock, and the output end of the locking hydraulic cylinder is connected to one end of the pressure plate. The other end of the pressure plate contacts the top of the locking rod.

[0013] Further specified, a locking groove is provided on one side of the locking rod, and the locking groove cooperates with the circumference of the sleeve; a second limiting groove is provided on the other side of the locking rod, the second limiting groove is opened along the axis of the locking rod, and a second limiting post is provided on the tailstock, one end of the second limiting post is located on the outside of the tailstock, and the other end of the second limiting post extends into the second limiting groove.

[0014] Furthermore, a return spring is provided inside the locking rod, and the locking rod is elastically connected to the tailstock through the return spring.

[0015] Further specified, the output end of the locking hydraulic cylinder is fitted with a tapered sleeve, the outer diameter of the tapered sleeve gradually decreases from top to bottom, the tapered sleeve is connected to the output end of the locking hydraulic cylinder through a limiting pin, and one end of the pressure plate is fitted on the outside of the tapered sleeve.

[0016] Furthermore, the bottom of the tailstock is provided with a tailstock gasket, which is connected to the bottom of the tailstock by an adjusting screw.

[0017] The beneficial effects of this utility model are as follows: 1. This utility model abandons the method of providing clamping force through springs and adopts hydraulic force to drive the center to clamp the workpiece, thereby improving service life. The clamping force can be adjusted according to the operation requirements to meet the clamping requirements of different workpieces. The clamping force is more stable and reliable, reducing the noise generated during processing and ensuring the reliability of the tail tip.

[0018] 2. This utility model has a simple structure. By setting a top disassembly sleeve on the top, the disassembly difficulty can be further reduced, the disassembly efficiency can be improved, maintenance and repair can be facilitated, the overall stability of the tail top can be improved, and the actual operation needs can be met. Attached Figure Description

[0019] Figure 1 This is a front view of the hydraulic tailstock structure of this utility model; Figure 2 for Figure 1 Sectional view along the AA direction; Figure 3 This is a rear view of the hydraulic tailstock structure of this utility model.

[0020] In the diagram, 10-tailstock; 11-first limiting post; 12-second limiting post; 13-tailstock gasket; 14-bolt; 15-adjusting screw; 20-center; 21-sleeve; 22-cover plate; 23-lateral limiting groove; 24-center removal sleeve; 30-thin hydraulic cylinder; 31-hydraulic cylinder rod; 40-locking mechanism; 41-locking rod; 42-locking hydraulic cylinder; 43-pressure plate; 44-reset spring; 45-conical sleeve; 46-limiting pin. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0024] In the description of the embodiments of this utility model, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the utility model. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] Example 1 refer to Figures 1-3 This utility model provides a hydraulic tailstock structure, including a tailstock 10, a tip 20, a thin hydraulic cylinder 30, and a locking mechanism 40. The tailstock 10 is mounted on a base plate, and its bottom is fixed to the base plate by bolts 14 and nuts. The top of the tailstock 10 is sleeved on the outside of the tip 20, which is slidably connected to the tailstock 10, allowing the tip 20 to move along its axial direction to loosen and tighten the workpiece. During tightening, to ensure the reliability of workpiece processing, the locking mechanism 40 is located on one side of the tip 20 and contacts it, used to lock the tip 20 and improve its reliability. The fixed end of the thin hydraulic cylinder 30 is connected to the tail end of the tailstock 10, and its output end extends into the tailstock 10 and connects to the tail end of the tip 20, used to adjust the movement of the tip 20 according to processing requirements.

[0026] To further explain, a sleeve 21 is fitted on the outer side of the tip 20. The tip 20 and the sleeve 21 are detachably connected. The inner diameter of the sleeve 21 matches the outer shape of the tip 20. The tip 20 can be a frustum. The outer diameter of the tip 20 gradually decreases from the first end to the last end, thereby ensuring a stable connection between the sleeve 21 and the tip 20 and preventing slippage. The tailstock 10 is fitted on the outer side of the sleeve 21. The tip 20 is slidably connected to the tailstock 10 through the sleeve 21. The output end of the thin hydraulic cylinder 30 is connected to the tail end of the sleeve 21, so that the output end of the thin hydraulic cylinder 30 adjusts the position of the tip 20 by driving the sleeve 21 to move back and forth in the tailstock 10.

[0027] Specifically, a cover plate 22 is provided at the tail end of the sleeve 21, and a cylinder rod 31 is provided at the output end of the thin cylinder 30. The cylinder rod 31 and the cover plate 22 are detachably connected by a first screw. The first screw is M8x25 in size, and a right-center washer is fitted on the head of the first screw. The right-center washer contacts the cover plate 22. The head of the first screw is located in the sleeve 21, and the tail of the first screw is threadedly connected to the cylinder rod 31. The detachable connection between the cover plate 22 and the tail end of the sleeve 21 facilitates disassembly and assembly for later maintenance and reduces the difficulty of operation.

[0028] To further explain, in order to facilitate the disassembly of the sleeve 21 and the tip 20, a tip disassembly sleeve 24 is provided on the tip 20. The tip disassembly sleeve 24 is located on the outside of the tailstock 10 and close to the head end of the tip 20. The tip 20 can be disassembled with the help of the tip disassembly sleeve 24.

[0029] To ensure the limited displacement distance of the center point 20 and the tightness requirement of the workpiece, a transverse limiting groove 23 is opened on the outer surface of the sleeve 21. The transverse limiting groove 23 is set along the axis of the sleeve 21. A first limiting post 11 is set on the tailstock 10. The bottom of the first limiting post 11 extends through the tailstock 10 into the transverse limiting groove 23. During operation, the sleeve 21 drives the center point 20 to move under the drive of the thin hydraulic cylinder 30. The moving distance of the sleeve 21 is the distance when the first limiting post 11 contacts both sides of the transverse limiting groove 23.

[0030] To further explain, the locking mechanism 40 includes a locking rod 41, a locking hydraulic cylinder 42, and a pressure plate 43. The top of the locking rod 41 is located above the tailstock 10, and the bottom of the locking rod 41 extends into the tailstock 10. The locking rod 41 is movably connected to the tailstock 10 and contacts the periphery of the sleeve 21. The fixed end of the locking hydraulic cylinder 42 is connected to the outside of the tailstock 10, and the output end of the locking hydraulic cylinder 42 is connected to one end of the pressure plate 43. The other end of the pressure plate 43 contacts the top of the locking rod 41.

[0031] The locking hydraulic cylinder 42 extends and retracts, causing the pressure plate 43 to move up and down. The pressure plate 43 then presses the locking rod 41 downwards, ensuring that the locking rod 41 maintains close contact with the sleeve 21. This limits the movement of the sleeve 21, preventing it from slipping and causing a failure to tighten, thus further ensuring operational reliability.

[0032] To further explain, a locking groove is provided on one side of the locking rod 41. The locking groove fits with the circumference of the sleeve 21. The axis of the locking groove is in the same direction as the axis of the sleeve 21. When the locking rod 41 moves downward, the inner wall of the locking groove contacts the outer wall of the sleeve 21 and squeezes the sleeve 21 to lock the tip 20. A second limiting groove is provided on the other side of the locking rod 41. The second limiting groove is opened along the axis of the locking rod 41. A second limiting post 12 is provided on the tailstock 10. One end of the second limiting post 12 is located on the outside of the tailstock 10, and the other end of the second limiting post 12 extends into the second limiting groove to limit the downward and upward movement of the locking rod 41.

[0033] Preferably, a return spring 44 is provided inside the locking rod 41. The locking rod 41 is elastically connected to the tailstock 10 through the return spring 44. When the pressure plate 43 moves downward, the locking rod 41 compresses the return spring 44 downward. After the pressure plate 43 is lifted, the return spring 44 pushes the locking rod 41 up and down, releasing the limitation on the sleeve 21.

[0034] The output end of the locking hydraulic cylinder 42 is fitted with a tapered sleeve 45. The outer diameter of the tapered sleeve 45 gradually decreases from top to bottom. The tapered sleeve 45 is connected to the output end of the locking hydraulic cylinder 42 through a limiting pin 46. One end of the pressure plate 43 is fitted on the outside of the tapered sleeve 45 to ensure the reliability of the connection between the pressure plate 43 and the locking hydraulic cylinder 42.

[0035] To further explain, a tailstock shim 13 is provided at the bottom of the tailstock 10. The tailstock shim 13 is connected to the bottom of the tailstock 10 by an adjusting screw 15. The distance between the tailstock 10 and the tailstock shim 13 can be adjusted by adjusting the screw 15, thereby realizing the height adjustment of the tailstock 10 and further meeting different operating requirements.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0037] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by those skilled in the art. The above content is only for illustrating the technical concept of this utility model and should not be used to limit the scope of protection of this utility model. Any modifications made to the technical solutions based on the technical concept proposed by this utility model shall fall within the scope of protection of the claims of this utility model.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A hydraulic tailstock structure, characterized in that, It includes a tailstock (10), a tip (20), a thin hydraulic cylinder (30), and a locking mechanism (40). The top of the tailstock (10) is sleeved on the outside of the tip (20). The tip (20) is slidably connected to the tailstock (10). The locking mechanism (40) is located on one side of the tip (20) and contacts the tip (20). The fixed end of the thin hydraulic cylinder (30) is connected to the tail end of the tailstock (10). The output end of the thin hydraulic cylinder (30) extends into the tailstock (10) and is connected to the tail end of the tip (20).

2. The hydraulic tailstock structure according to claim 1, characterized in that, A sleeve (21) is fitted on the outside of the tip (20). The tip (20) and the sleeve (21) are detachably connected. The tailstock (10) is fitted on the outside of the sleeve (21). The tip (20) is slidably connected to the tailstock (10) through the sleeve (21). The output end of the thin cylinder (30) is connected to the tail end of the sleeve (21).

3. The hydraulic tailstock structure according to claim 2, characterized in that, The sleeve (21) is provided with a cover plate (22) at its tail end, and the output end of the thin cylinder (30) is provided with a cylinder rod (31). The cylinder rod (31) is detachably connected to the cover plate (22), and the cover plate (22) is detachably connected to the tail end of the sleeve (21).

4. The hydraulic tailstock structure according to claim 2, characterized in that, The outer surface of the sleeve (21) is provided with a transverse limiting groove (23), which is arranged along the axis of the sleeve (21). The tailstock (10) is provided with a first limiting post (11), the bottom of which extends through the tailstock (10) into the transverse limiting groove (23).

5. The hydraulic tailstock structure according to claim 2, characterized in that, A top removal sleeve (24) is fitted on the top tip (20). The top removal sleeve (24) is located on the outside of the tailstock (10) and is close to the head end of the top tip (20).

6. The hydraulic tailstock structure according to claim 2, characterized in that, The locking mechanism (40) includes a locking rod (41), a locking hydraulic cylinder (42), and a pressure plate (43). The top of the locking rod (41) is located above the tailstock (10), and the bottom of the locking rod (41) extends into the tailstock (10). The locking rod (41) is movably connected to the tailstock (10), and the locking rod (41) contacts the periphery of the sleeve (21). The fixed end of the locking hydraulic cylinder (42) is connected to the outside of the tailstock (10), and the output end of the locking hydraulic cylinder (42) is connected to one end of the pressure plate (43). The other end of the pressure plate (43) contacts the top of the locking rod (41).

7. The hydraulic tailstock structure according to claim 6, characterized in that, A locking groove is provided on one side of the locking rod (41), and the locking groove is engaged with the circumference of the sleeve (21); a second limiting groove is provided on the other side of the locking rod (41), and the second limiting groove is opened along the axis of the locking rod (41). A second limiting post (12) is provided on the tailstock (10), one end of the second limiting post (12) is located outside the tailstock (10), and the other end of the second limiting post (12) extends into the second limiting groove.

8. The hydraulic tailstock structure according to claim 7, characterized in that, The locking rod (41) is provided with a return spring (44), and the locking rod (41) is elastically connected to the tailstock (10) through the return spring (44).

9. The hydraulic tailstock structure according to claim 6, characterized in that, The output end of the locking hydraulic cylinder (42) is fitted with a tapered sleeve (45). The outer diameter of the tapered sleeve (45) gradually decreases from top to bottom. The tapered sleeve (45) is connected to the output end of the locking hydraulic cylinder (42) through a limiting pin (46). One end of the pressure plate (43) is fitted on the outside of the tapered sleeve (45).

10. The hydraulic tailstock structure according to claim 1, characterized in that, The bottom of the tailstock (10) is provided with a tailstock gasket (13), which is connected to the bottom of the tailstock (10) by an adjusting screw (15).

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