Tailstock assembly and machine tool

Abstract

This application relates to the field of machine tool component technology, and discloses a tailstock assembly and a machine tool. The tailstock assembly includes a tailstock component, a hook, a guide rail, and a drive assembly. When the tailstock assembly is working, the hydraulic cylinder in the drive assembly is the core power source. When locking is required, the hydraulic cylinder drives the pressure rod to move in a first direction. Because the side of the pressure rod that contacts the base is inclined, the action of the inclined surface is transmitted to the base, causing the hook connected to the base to move synchronously, gradually approaching and connecting to the guide rail on one side of the base. At this time, the tailstock assembly enters the locked state. When unlocking is required, the hydraulic cylinder drives the pressure rod to move in a second direction. The direction of the inclined surface action changes, and the base causes the hook to gradually disengage from the guide rail, switching the tailstock assembly to the unlocked state. Throughout the process, the base provides mounting support for the tailstock component, hook, guide rail, and other components, ensuring that the actions of each component are coordinated and orderly.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of machine tool components, and particularly relate to a tailstock assembly and a machine tool. BACKGROUND

[0002] In the field of machine tool processing, the tailstock is a key component for supporting workpieces and ensuring processing accuracy, and its performance directly affects the processing quality and operational stability of the machine tool. With the increasing requirements of the manufacturing industry for processing accuracy, efficiency and safety, the traditional tailstock structure gradually exposes many technical pain points and is difficult to meet the needs of modern production. In traditional technology, the tailstock is mostly locked by a lead screw. On the one hand, the vibration generated during machine tool processing can exacerbate the influence of the thread gap, causing the locking component to displace slightly, which causes the tailstock to be unable to maintain a stable positioning state, thereby causing workpiece processing deviation, especially in high-precision turning, grinding and other scenarios, the problem has a more significant impact on processing quality. On the other hand, the manufacturing precision of the lead screw directly determines the locking precision. Under the traditional processing technology, the precision of the lead screw is difficult to meet the needs of ultra-precision machining, and once the lead screw is bent, deformed or has other problems, it will directly cause the locking to fail, increasing the risk of equipment failure. SUMMARY

[0003] A series of simplified concepts are introduced in the summary section, which will be further described in detail in the specific embodiments section. This part of the present application does not mean to attempt to limit the key features and necessary technical features of the claimed technical solution, nor does it mean to attempt to determine the protection scope of the claimed technical solution.

[0004] The present application aims to solve at least one of the technical problems existing in the prior art or related art.

[0005] To this end, a first aspect of the present application provides a tailstock assembly.

[0006] A second aspect of the present application provides a machine tool.

[0007] Therefore, according to the first aspect of the embodiments of the present application, a tailstock assembly is provided, comprising:

[0008] A tailstock assembly, comprising a base and a seat body, the seat body being arranged on the base;

[0009] A pull hook arranged in the base, the pull hook being connected to the seat body;

[0010] A guide rail arranged on one side of the base, the tailstock assembly being in a locked state when the guide rail and the pull hook are connected, and the tailstock assembly being in an unlocked state when the pull hook and the guide rail are disconnected;

[0011] A drive assembly includes a pressure rod and a hydraulic cylinder. The contact side of the pressure rod with the seat is an inclined surface. When the pressure rod moves in a first direction, the hook is connected to the guide rail. When the pressure rod moves in a second direction, the hook disengages from the guide rail.

[0012] In one feasible implementation, the seat body includes:

[0013] The main body is disposed on the base;

[0014] A pressure block, which is slidably connected to the body, and a hook connected to the pressure block.

[0015] In one feasible implementation, there are at least two pressure blocks and at least two hooks, with each pressure block corresponding to one pressure rod;

[0016] The number of guide rails is adapted to the number of hooks.

[0017] In one feasible implementation, the tailstock assembly further includes:

[0018] The pressure block has a first lubricating oil supply path, and the pressure rod has a second lubricating oil supply path, which is connected to the first lubricating oil supply path.

[0019] In one feasible implementation, the hydraulic cylinder includes:

[0020] A cylinder block, wherein a first oil port and a second oil port are provided on the cylinder block;

[0021] A first piston is disposed within the cylinder body;

[0022] A connecting rod, one end of which is connected to the first piston and the other end of which is connected to the pressure rod;

[0023] When the cylinder body receives oil through the first oil port and exits oil through the second oil port, the first piston drives the pressure rod to move in the first direction.

[0024] When oil enters the cylinder through the second oil port and exits through the first oil port, the first piston drives the pressure rod to move in the second direction.

[0025] In one feasible implementation, the tailstock assembly further includes: a guide assembly, the guide assembly comprising:

[0026] The hook has a groove, the elastic element is disposed in the groove, and the pin is disposed on the elastic element and is used to abut against the pressure rod.

[0027] In one feasible implementation, the tailstock assembly further includes: a limiting component, the limiting component comprising:

[0028] A limiting plate and a proximity switch are provided. The limiting plate is connected to the housing of the drive assembly. An elongated hole is provided on the limiting plate. The proximity switch passes through the elongated hole and is connected to the hydraulic cylinder to detect the drive position of the hydraulic cylinder.

[0029] In one feasible implementation, the tailstock assembly further includes:

[0030] A centering assembly, the centering assembly including a sleeve and a movable center movably disposed within the sleeve, the sleeve being connected to the base body;

[0031] A drive oil circuit and a brake lever, wherein the drive oil circuit is connected to the brake lever, and the brake lever is used to drive the movable tip;

[0032] A locking assembly, which is connected in parallel with the tip assembly to the drive oil circuit, is used to lock the brake lever in the event of an abnormality in the drive oil circuit.

[0033] In one feasible implementation, the locking component includes:

[0034] A brake box is disposed on one side of the brake lever, and a third oil port is formed on the brake box;

[0035] The second piston is disposed inside the brake chamber;

[0036] A disc spring, wherein the disc spring is disposed within the second piston and the brake housing;

[0037] The second piston has a first tooth on the side facing the brake lever, and the brake lever has a second tooth on the side facing the second piston. When hydraulic oil is injected into the third oil port, the second piston moves away from the brake lever. When the injection of hydraulic oil stops at the third oil port, the second tooth abuts against the first tooth.

[0038] A machine tool is provided according to a second aspect of the embodiments of this application, comprising:

[0039] Tailstock assembly as described in any of the above technical solutions.

[0040] Compared with the prior art, the present invention has at least the following beneficial effects:

[0041] The tailstock assembly provided in this embodiment includes a tailstock component, a hook, a guide rail, and a drive assembly. When the tailstock assembly is working, the hydraulic cylinder in the drive assembly is the core power source. When locking is required, the hydraulic cylinder drives the pressure rod to move in a first direction. Because the side of the pressure rod that contacts the base is inclined, the inclined surface action is transmitted to the base, causing the hook connected to the base to move synchronously, gradually approaching and connecting to the guide rail on one side of the base. At this time, the tailstock assembly enters the locked state. When unlocking is required, the hydraulic cylinder drives the pressure rod to move in a second direction. The direction of the inclined surface action changes, and the base causes the hook to gradually disengage from the guide rail, switching the tailstock assembly to the unlocked state. Throughout the process, the base provides mounting support for the tailstock component, hook, guide rail, and other components, ensuring that the actions of each component are coordinated and orderly.

[0042] The tailstock assembly provided in this application embodiment utilizes a hydraulic cylinder to drive a pressure rod. Combined with the engagement of the pressure rod's inclined surface and the seat body, it achieves precise connection or disengagement between the hook and the guide rail. The action transmission is direct and efficient, avoiding the lag issues of traditional locking methods and improving the response speed of locking and unlocking. In terms of stability, the engagement between the hook and the guide rail, and the contact between the pressure rod and the inclined surface of the seat body, ensure a tight connection when locked and smooth separation when unlocked. This guarantees that the tailstock assembly is not prone to loosening in the locked state and moves flexibly in the unlocked state, effectively improving the overall operational stability of the tailstock assembly. This provides a reliable guarantee for the precise positioning of the workpiece during machine tool processing and reduces machining errors caused by locking / unlocking issues.

[0043] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0044] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0045] Figure 1 A schematic cross-sectional view of a tailstock assembly according to an embodiment of this application;

[0046] Figure 2 A schematic structural diagram of a tailstock assembly according to an embodiment of this application;

[0047] Figure 3 Another schematic structural view of the tailstock assembly provided in this application from another angle;

[0048] Figure 4 A schematic structural diagram of the tailstock assembly according to one embodiment of this application from another angle;

[0049] Figure 5 for Figure 4 A magnified view of a portion of point A in the middle;

[0050] Figure 6 A schematic structural diagram of the locking component of a tailstock assembly according to one embodiment of this application.

[0051] in, Figures 1 to 6 The correspondence between the reference numerals and the component names is as follows:

[0052] 110 Tailstock assembly, 120 Hook, 130 Guide rail, 140 Drive assembly, 150 First lubricating oil supply path, 160 Second lubricating oil supply path, 170 Guide assembly, 180 Limiting assembly;

[0053] 111 Base, 112 Base body, 1121 Body, 1122 Pressing block;

[0054] 141 Pressure rod, 142 Hydraulic cylinder, 1421 Cylinder body, 1422 First piston, 1423 Connecting rod, 1424 First oil port, 1425 Second oil port;

[0055] 171 Elastic component, 172 Shaft pin;

[0056] 181 Limit plate, 182 Proximity switch;

[0057] 210 top component, 220 brake lever, 230 locking component;

[0058] 211 sleeve, 212 movable tip;

[0059] 231 Brake box, 232 Third oil port, 233 Second piston, 234 Disc spring. Detailed Implementation

[0060] The following description provides numerous specific details to offer a more thorough understanding of the technical solutions provided by this invention. However, it will be apparent to those skilled in the art that the technical solutions provided by this invention can be implemented without one or more of these details.

[0061] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms “comprising” and / or “including” are used in this specification, they indicate the presence of the stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof.

[0062] Exemplary embodiments according to the present invention will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of the invention is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art.

[0063] like Figures 1 to 3 As shown, a tailstock assembly is provided according to a first aspect of the present application, comprising: a tailstock assembly 110, the tailstock assembly 110 including a base 111 and a seat body 112, the seat body 112 being disposed on the base 111; a hook 120 disposed within the base 111 and connected to the seat body 112; and a guide rail 130 disposed on one side of the base 111, wherein the tailstock is connected to the hook 120 when the guide rail 130 is connected to the hook 120. The assembly is in the locked state. When the hook 120 is disengaged from the guide rail 130, the tailstock assembly is in the unlocked state. The drive assembly 140 includes a pressure rod 141 and a hydraulic cylinder 142. The contact side between the pressure rod 141 and the seat 112 is an inclined surface. When the pressure rod 141 moves in the first direction, the hook 120 is connected to the guide rail 130. When the pressure rod 141 moves in the second direction, the hook 120 is disengaged from the guide rail 130.

[0064] The tailstock assembly provided in this embodiment includes a tailstock component 110, a hook 120, a guide rail 130, and a drive component 140. When the tailstock assembly is working, the hydraulic cylinder 142 in the drive component 140 is the core power source. When locking is required, the hydraulic cylinder 142 drives the pressure rod 141 to move in a first direction. Because the side of the pressure rod 141 that contacts the base 112 is inclined, the inclined action is transmitted to the base 112, causing the hook 120 connected to the base 112 to move synchronously, gradually approaching and connecting to the guide rail 130 on one side of the base 111. At this time, the tailstock assembly enters the locked state. When unlocking is required, the hydraulic cylinder 142 drives the pressure rod 141 to move in a second direction. The direction of the inclined action changes, and the base 112 causes the hook 120 to gradually disengage from the guide rail 130, switching the tailstock assembly to the unlocked state. Throughout the process, the base 111 provides installation support for components such as the tailstock assembly 110, hook 120, and guide rail 130, ensuring that the actions of each component are coordinated and orderly.

[0065] The tailstock assembly provided in this embodiment uses a hydraulic cylinder 142 to drive a pressure rod 141. Combined with the engagement of the inclined surface of the pressure rod 141 with the seat body 112, it achieves precise connection or disengagement between the hook 120 and the guide rail 130. The action transmission is direct and efficient, avoiding the lag problem of traditional locking methods and improving the response speed of locking and unlocking. In terms of stability, the engagement between the hook 120 and the guide rail 130, and the inclined surface contact between the pressure rod 141 and the seat body 112, ensure a tight connection when locked and smooth separation when unlocked. This guarantees that the tailstock assembly is not prone to loosening in the locked state and moves flexibly in the unlocked state, effectively improving the overall operational stability of the tailstock assembly. This provides a reliable guarantee for the precise positioning of the workpiece during machine tool processing and reduces machining errors caused by locking / unlocking issues.

[0066] like Figures 1 to 3 As shown, in one feasible embodiment, the seat 112 includes: a body 1121, which is disposed on the base 111; a pressure block 1122, which is slidably connected to the body 1121, and a hook 120 is connected to the pressure block 1122.

[0067] In this technical solution, the base 112 may include a body 1121 and a pressure block 1122 movably connected to the body 1121. A hook 120 is connected to the pressure block 1122. When the tailstock assembly is in operation, the hydraulic cylinder 142 drives the pressure rod 141 to move in a first direction. The inclined surface of the pressure rod 141 acts on the pressure block 1122, which is slidably connected to the body 1121, pushing the pressure block 1122 to slide along the body 1121. This, in turn, causes the hook 120 connected to the pressure block 1122 to approach the guide rail 130 on one side of the base 111. The hook 120 connects to the guide rail 130, and the assembly is locked. When unlocking is required, the hydraulic cylinder 142 drives the pressure rod 141 to move in a second direction. The force exerted by the inclined surface changes, the pressure block 1122 slides in the opposite direction, and the hook 120 disengages from the guide rail 130 along with the pressure block 1122, thus unlocking the assembly. The main body 1121 is fixed to the base 111, providing stable support for the sliding of the pressure block 1122 and ensuring the smooth operation of all components. The pressure block 1122 is slidably connected to the main body 1121, limiting the movement trajectory of the hook 120, preventing the hook 120 from deviating, making the docking of the hook 120 with the guide rail 130 more precise, improving the reliability of locking and unlocking, and reducing locking failure caused by component misalignment. The pressure block 1122 can more evenly transmit the force of the inclined surface of the pressure rod 141 to the hook 120, avoiding excessive local stress that could damage the components and extending the service life of the hook 120 and the pressure rod 141. At the same time, the sliding design of the pressure block 1122 makes the force transmission smoother, reducing the probability of movement jamming, allowing the assembly to maintain stable performance during frequent locking and unlocking operations, and ensuring the continuity and accuracy of machine tool processing.

[0068] In some examples, the pressure block 1122 has a U-shaped groove facing the guide rail 130, which can significantly reduce the contact area between the pressure block 1122 and related components when the pressure block 1122 moves. This structurally reduces frictional resistance, allowing the pressure block 1122 to slide more smoothly along the body 1121 and preventing jamming due to excessive friction. At the same time, the smaller contact area can reduce frictional wear, extend the service life of the pressure block 1122 and its mating components, ensure the continuity of the tailstock assembly's locking / unlocking action, and indirectly improve overall operating efficiency and stability.

[0069] like Figures 1 to 3As shown, in one feasible implementation, there are at least two pressure blocks 1122 and hooks 120, with each pressure block 1122 corresponding to a pressure rod 141; the number of guide rails 130 is adapted to the number of hooks 120. This arrangement, with multiple sets of pressure blocks 1122, hooks 120, and adapted guide rails 130, allows for locking and unlocking control of the tailstock assembly from multiple points, ensuring that the locking force is evenly distributed between the base 111 and the seat 112, preventing component deformation caused by excessive force at a single point, and improving the overall structural stability of the assembly. Each pressure block 1122 corresponds to an independent pressure rod 141, enabling synchronous operation of each locking unit, ensuring precise docking between the hooks 120 and the guide rails 130, and reducing locking deviations caused by asynchronous actions. The number of adapted guide rails 130 ensures that each hook 120 has a corresponding locking point, further enhancing locking reliability, meeting the tailstock locking strength requirements during heavy workpiece processing, and reducing the risk of displacement caused by processing vibration.

[0070] In some examples, there are two rails 130, each rail 130 has two hooks 120, and there can be four hooks 120.

[0071] It is understandable that the first direction is the direction in which the pressure rod 141 moves outward, that is, moves away from the oil cylinder 142, and the second direction is the direction in which the pressure rod 141 moves inward, that is, moves closer to the oil cylinder 142.

[0072] like Figures 1 to 3 As shown, in one feasible embodiment, the tailstock assembly further includes: a first lubricating oil supply path 150 is provided on the pressure block 1122, and a second lubricating oil supply path 160 is provided on the pressure rod 141, the second lubricating oil supply path 160 being connected to the first lubricating oil supply path 150.

[0073] In this technical solution, the tailstock assembly may include a first lubricating oil supply path 150 and a second lubricating oil supply path 160. The first lubricating oil supply path 150 of the pressure block 1122 is connected to the second lubricating oil supply path 160 of the pressure rod 141, which can accurately deliver lubricating oil to the contact area between the pressure block 1122 and the pressure rod 141, as well as the sliding contact surface between the pressure block 1122 and the body 1121. This achieves comprehensive lubrication of key friction parts, avoiding the problem of inadequate local lubrication under traditional lubrication methods, and significantly reducing the frictional resistance between components. Continuous and precise lubrication can reduce the wear of components such as the pressure block 1122 and the pressure rod 141, avoid damage such as surface scratches and deformation caused by dry friction, extend the service life of each component, and reduce maintenance and replacement costs. At the same time, good lubrication can reduce frictional heat generation, avoid affecting component performance due to local overheating, and ensure that the tailstock assembly can maintain stable locking and unlocking actions during long-term high-frequency operation, providing support for machine tool processing efficiency and accuracy.

[0074] like Figures 1 to 3 As shown, in one feasible embodiment, the hydraulic cylinder 142 includes: a cylinder body 1421, on which a first oil port 1424 and a second oil port 1425 are provided; a first piston 1422, which is disposed inside the cylinder body 1421; and a connecting rod 1423, one end of which is connected to the first piston 1422 and the other end of which is connected to the pressure rod 141; wherein, when oil enters the cylinder body 1421 through the first oil port 1424 and exits through the second oil port 1425, the first piston 1422 drives the pressure rod 141 to move in a first direction; wherein, when oil enters the cylinder body 1421 through the second oil port 1425 and exits through the first oil port 1424, the first piston 1422 drives the pressure rod 141 to move in a second direction.

[0075] In this technical solution, when the tailstock assembly needs to be locked, hydraulic oil enters through the first port 1424 of the cylinder 1421 and exits simultaneously through the second port 1425. The entering hydraulic oil pushes the first piston 1422 inside the cylinder 1421 to move, and the connecting rod 1423 connected to the first piston 1422 moves in conjunction with it, driving the pressure rod 141 connected to the other end to move in the first direction. The pressure rod 141 acts on the pressure block 1122 through the inclined surface, causing the hook 120 to approach and connect to the guide rail 130, thus completing the locking. When unlocking is required, the hydraulic oil is switched to enter through the second port 1425 and exit through the first port 1424. The first piston 1422 moves in the opposite direction, and the connecting rod 1423 drives the pressure rod 141 to move in the second direction. The pressure block 1122 drives the hook 120 to disengage from the guide rail 130, thus unlocking. The entire process controls the piston movement through the oil inlet and outlet, thereby driving the pressure rod 141 to move. By controlling the oil inlet and outlet of the hydraulic cylinder 142 through dual oil ports, the first piston 1422 can be precisely driven to move in both directions, thereby achieving stable bidirectional movement of the pressure rod 141. This ensures more reliable connection or disengagement between the hook 120 and the guide rail 130, avoiding jamming or deviation. The connecting rod 1423 transmits piston power, making force transmission more direct and efficient, and reducing energy loss. Compared with traditional mechanical drive, this hydraulic drive method has a faster response speed and more stable driving force, which can adapt to the locking and unlocking force requirements of the tailstock assembly under different working conditions, improving overall operational stability.

[0076] like Figures 1 to 3 As shown, in one feasible embodiment, the tailstock assembly further includes a guide assembly 170, which includes an elastic element 171 and a pin 172. A groove is provided on the hook 120, the elastic element 171 is disposed in the groove, and the pin 172 is disposed on the elastic element 171. The pin 172 is used to abut against the pressure rod 141.

[0077] In this technical solution, the tailstock assembly may include a guide component 170, which may include an elastic element 171 and a pin 172. Under the action of the elastic element 171, the pin 172 is always in contact with the pressure rod 141, forming a real-time fitted support and positioning. This limits the lateral displacement of the pressure rod 141 during movement, preventing it from tilting due to uneven force and ensuring smooth movement along a preset direction. Simultaneously, the recessed groove limits the elastic element 171, making its elastic force output more stable. The pin 172 provides continuous and uniform support to the pressure rod 141, reducing vibration or jamming during movement. This stable guiding support allows the pressure rod 141 to accurately transmit driving force to the pressure block 1122 and the hook 120, ensuring precise and reliable locking / unlocking actions and avoiding component misalignment errors caused by the offset of the pressure rod 141.

[0078] like Figures 1 to 3 As shown, in one feasible embodiment, the tailstock assembly further includes a limiting component 180, which includes a limiting plate 181 and a proximity switch 182. The limiting plate 181 is used to connect to the housing of the drive assembly 140. An elongated hole is provided on the limiting plate 181, and the proximity switch 182 passes through the elongated hole and is connected to the hydraulic cylinder 142 for detecting the drive position of the hydraulic cylinder 142.

[0079] In this technical solution, the tailstock assembly may also include a limiting component 180, which may include a limiting plate 181 and a proximity switch 182. The limiting component 180 can accurately control the driving position of the hydraulic cylinder 142. The proximity switch 182 passes through the elongated hole of the limiting plate 181 and connects to the hydraulic cylinder 142. It can detect the stroke of the hydraulic cylinder 142 in real time, preventing the hydraulic cylinder 142 from overtraveling and causing excessive stress and damage to components such as the pressure rod 141 and the hook 120, ensuring that the operation of each component is within a safe range. The elongated hole design provides installation and adjustment space for the proximity switch 182, facilitating fine-tuning of the detection position according to actual working conditions to adapt to different locking / unlocking requirements. At the same time, by accurately detecting the position of the hydraulic cylinder 142, the oil inlet / outlet switching can be triggered in time to ensure that the pressure rod 141 moves into place, so that the hook 120 accurately engages or disengages from the guide rail 130, improving the locking / unlocking accuracy and reliability of the tailstock assembly.

[0080] like Figures 1 to 6 As shown, in one feasible embodiment, the tailstock assembly further includes: a center assembly 210, which includes a sleeve 211 and a movable center 212 movably disposed within the sleeve 211, the sleeve 211 being connected to the seat body 112; a drive oil circuit and a brake lever 220, the drive oil circuit being connected to the brake lever 220, the brake lever 220 being used to drive the movable center 212; and a locking assembly 230, which is connected in parallel with the center assembly 210 in the drive oil circuit, the locking assembly 230 being used to lock the brake lever 220 in the event of an abnormality in the drive oil circuit.

[0081] This technical solution further provides the structural composition of the tailstock assembly, which may also include a center assembly 210, a drive oil circuit, a brake lever 220, and a locking assembly 230. When the center assembly 210 is working, the drive oil circuit supplies hydraulic oil to the brake lever 220. The pressure of the hydraulic oil drives the brake lever 220 to move, which in turn moves the movable center 212 inside the sleeve 211, allowing the movable center 212 to extend or retract to meet the workpiece support requirements. When extended, it can clamp the workpiece, providing stable support for processing; when retracted, it facilitates workpiece loading and unloading. The locking assembly 230 is connected in parallel with the center assembly 210 in the drive oil circuit. Under normal oil supply, it does not interfere with the movement of the brake lever 220 and the movable center 212. When the drive oil circuit experiences abnormal conditions such as oil supply interruption or sudden pressure drop, the locking assembly 230 quickly activates to lock the brake lever 220, preventing the brake lever 220 and the movable center 212 from moving unexpectedly, thus ensuring stable workpiece positioning. The movable tip 212 can be precisely adjusted in length via the brake lever 220, allowing it to closely fit workpieces of different specifications, providing reliable support for machining, reducing workpiece vibration, and improving machining accuracy. From a safety perspective, the locking assembly 230 quickly locks the brake lever 220 in case of hydraulic circuit malfunction, preventing accidental movement of the movable tip 212 that could cause workpiece displacement or detachment, thus reducing the risk of equipment and workpiece damage. Simultaneously, the coordination between the drive hydraulic circuit and the brake lever 220 ensures rapid response of the movable tip 212, adapting to the high-frequency workpiece loading, unloading, and machining needs of machine tools, and guaranteeing production continuity.

[0082] In some examples, abnormal conditions in the drive oil circuit include drive oil circuit disconnection or insufficient oil supply.

[0083] In one feasible embodiment, the locking assembly 230 includes: a brake housing 231 disposed on one side of the brake lever 220, and a third oil port 232 formed on the brake housing 231; a second piston 233 disposed inside the brake housing 231; and a disc spring 234 disposed inside the second piston 233 and the brake housing 231. The second piston 233 has a first tooth formed on the side facing the brake lever 220, and the brake lever 220 has a second tooth formed on the side facing the second piston 233. When hydraulic oil is injected into the third oil port 232, the second piston 233 moves away from the brake lever 220. When the injection of hydraulic oil stops at the third oil port 232, the second tooth abuts against the first tooth.

[0084] In this technical solution, the structural composition of the locking assembly 230 is further provided. The locking assembly 230 may include a brake housing 231, a second piston 233, and a disc spring 234. When the locking assembly 230 is working, because it is connected in parallel with the tip assembly 210 in the drive oil circuit, the oil supply state of the third oil port 232 changes synchronously with the drive oil circuit. When the drive oil circuit supplies oil normally, hydraulic oil is injected into the brake housing 231 through the third oil port 232, pushing the second piston 233 in the housing to move away from the brake lever 220. During this process, the disc spring 234 between the second piston 233 and the brake housing 231 is compressed. At this time, the first tooth on the second piston 233 separates from the second tooth of the brake lever 220, and the brake lever 220 can move freely to drive the movable tip 212. When the drive oil circuit malfunctions (such as an interruption in oil supply), the third oil port 232 stops supplying oil, the disc spring 234 elastically resets, and pushes the second piston 233 towards the brake lever 220, causing the first and second teeth to engage, thereby locking the brake lever 220 and preventing it from accidentally moving the movable tip 212. The locking assembly 230 can respond quickly to oil circuit malfunctions, reliably locking the brake lever 220 through tooth engagement, preventing the movable tip 212 from accidentally moving and causing workpiece displacement or detachment, thus ensuring processing safety and workpiece accuracy. In terms of stability, the tooth engagement locking method has strong tightness and can withstand large external forces, and the disc spring 234 has stable elasticity, ensuring a continuous and reliable locking state. At the same time, during normal oil supply, the tooth separation does not interfere with the action of the brake lever 220, balancing the normal operating efficiency of the equipment with safety assurance under abnormal conditions.

[0085] In some examples, the tailstock assembly may also include a locking position switch to detect the position of the brake lever 220.

[0086] like Figures 1 to 6 As shown, a machine tool is provided according to a second aspect of the embodiments of this application, including: a tailstock assembly as described in any of the above technical solutions.

[0087] The machine tool provided in this application embodiment includes the tailstock assembly of any of the above-described technical solutions, and therefore possesses all the beneficial effects of the tailstock assembly of the above-described technical solutions, which will not be elaborated here.

[0088] In some examples, the machine tool may also include a worktable, with a tailstock assembly located at one end of the worktable.

[0089] In this invention, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0090] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0091] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0092] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A tailstock assembly, characterized in that, include: A tailstock assembly, the tailstock assembly including a base and a seat body, the seat body being disposed on the base; A hook is provided inside the base and is connected to the base body; The guide rail is disposed on one side of the base. When the guide rail is connected to the hook, the tail assembly is in a locked state. When the hook is disengaged from the guide rail, the tail assembly is in an unlocked state. A drive assembly includes a pressure rod and a hydraulic cylinder. The contact side of the pressure rod with the seat is an inclined surface. When the pressure rod moves in a first direction, the hook is connected to the guide rail. When the pressure rod moves in a second direction, the hook disengages from the guide rail. The seat body includes: The main body is disposed on the base; A pressure block, which is slidably connected to the body, and a hook connected to the pressure block; The pressure block has a first lubricating oil supply path, and the pressure rod has a second lubricating oil supply path, which is connected to the first lubricating oil supply path. The hydraulic cylinder includes: A cylinder block, wherein a first oil port and a second oil port are provided on the cylinder block; A first piston is disposed within the cylinder body; A connecting rod, one end of which is connected to the first piston and the other end of which is connected to the pressure rod; When the cylinder body receives oil through the first oil port and receives oil through the second oil port, the first piston drives the pressure rod to move in the first direction; When the cylinder body receives oil through the second oil port and receives oil through the first oil port, the first piston drives the pressure rod to move in the second direction; Guiding component, the guiding component comprising: The hook has a groove, the elastic element is disposed in the groove, and the pin is disposed on the elastic element and is used to abut against the pressure rod. A centering assembly, the centering assembly including a sleeve and a movable center movably disposed within the sleeve, the sleeve being connected to the base body; A drive oil circuit and a brake lever, wherein the drive oil circuit is connected to the brake lever, and the brake lever is used to drive the movable tip; A locking assembly, which is connected in parallel with the tip assembly to the drive oil circuit, is used to lock the brake lever in the event of an abnormality in the drive oil circuit.

2. The tailstock assembly according to claim 1, characterized in that, There are at least two pressure blocks and at least one pull hook, and each pressure block corresponds to one pressure rod; The number of guide rails is adapted to the number of hooks.

3. The tailstock assembly according to claim 1, characterized in that, Also includes: Limiting component, the limiting component includes: A limiting plate and a proximity switch are provided. The limiting plate is connected to the housing of the drive assembly. An elongated hole is provided on the limiting plate. The proximity switch passes through the elongated hole and is connected to the hydraulic cylinder to detect the drive position of the hydraulic cylinder.

4. The tailstock assembly according to claim 1, characterized in that, The locking component includes: A brake box is disposed on one side of the brake lever, and a third oil port is formed on the brake box; The second piston is disposed inside the brake chamber; A disc spring, wherein the disc spring is disposed within the second piston and the brake housing; The second piston has a first tooth on the side facing the brake lever, and the brake lever has a second tooth on the side facing the second piston. When hydraulic oil is injected into the third oil port, the second piston moves away from the brake lever. When the injection of hydraulic oil stops at the third oil port, the second tooth abuts against the first tooth.

5. A machine tool, characterized in that, include: The tailstock assembly as described in any one of claims 1 to 4.

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