Tailstock assembly and machine tool

Abstract

The embodiment of the invention relates to the technical field of machine tool parts, and discloses a tailstock assembly and a machine tool, the tailstock assembly comprises a tailstock assembly, a drag hook, a guide rail and a driving assembly, and when the tailstock assembly works, an oil cylinder in the driving assembly serves as a core power source. When locking is needed, the oil cylinder drives the pressing rod to move in the first direction, due to the fact that the side, making contact with the base body, of the pressing rod is an inclined face, the inclined face acts and transmits to the base body, the drag hook connected with the base body is driven to act synchronously, the drag hook gradually gets close to and is connected with a guide rail on one side of the base, and at the moment, the tailstock assembly enters the locking state. When unlocking is needed, the oil cylinder drives the pressing rod to move in the second direction, the acting direction of the inclined face is changed, the seat body drives the drag hook to be gradually separated from the guide rail, and the tailstock assembly is switched to the unlocking state. In the whole process, the base provides mounting support for the tailstock assembly, the drag hook, the guide rail and other components, and it is ensured that all the components act collaboratively and orderly.

Description

TECHNICAL FIELD

[0001] The embodiment of the present application relates to machine tool component technology field, especially a tailstock assembly and 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 running stability of the machine tool. With the continuous improvement of the requirements of manufacturing industry on processing precision, efficiency and safety, the traditional tailstock structure gradually exposes many technical pain points, which is difficult to meet the needs of modern production. In the traditional technology, the tailstock is mostly locked by a lead screw. On the one hand, the vibration generated during machine tool processing will exacerbate the influence of the thread gap, causing the locking component to have a slight displacement, which leads to the tailstock being unable to maintain a stable positioning state, and thus 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 has problems such as bending and deformation, it will directly lead to locking failure and increase 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 embodiment section. This part of the present application does not mean to try to limit the key features and necessary technical features of the claimed technical solution, nor does it mean to try 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, the first aspect of the present application provides a tailstock assembly.

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

[0007] Therefore, according to the first aspect of the embodiment of the present application, a tailstock assembly is provided, which comprises: a tailstock assembly, the tailstock assembly comprising a base and a seat body, the seat body being arranged on the base; a pull hook, the pull hook being arranged in the base and connected to the seat body; a guide rail, the guide rail being arranged on one side of the base, the tailstock assembly being in a locked state when the guide rail is connected to the pull hook, and the tailstock assembly being in an unlocked state when the pull hook is disconnected from the guide rail; The driving assembly comprises a pressure rod and a cylinder, the contact side of the pressure rod with the seat body is a slope, the draw hook is connected to the guide rail when the pressure rod moves in a first direction, and the draw hook is separated from the guide rail when the pressure rod moves in a second direction.

[0008] In an available embodiment, the seat body comprises: A body is arranged on the base; A pressing block is slidingly connected to the body, and the draw hook is connected to the pressing block.

[0009] In an available embodiment, the pressing block and the draw hook are both at least two, and each pressing block corresponds to one pressure rod; The number of the guide rails is adapted to the number of the draw hooks.

[0010] In an available embodiment, the tail seat assembly further comprises: A first lubricating oil supply path is arranged on the pressing block, and a second lubricating oil supply path is arranged on the pressure rod, and the second lubricating oil supply path is used to guide the first lubricating oil supply path.

[0011] In an available embodiment, the cylinder comprises: A cylinder body, on which a first oil port and a second oil port are arranged; A first piston is arranged in 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 is filled with oil through the first oil port and discharges oil through the second oil port, the first piston drives the pressure rod to move in a first direction; When the cylinder body is filled with oil through the second oil port and discharges oil through the first oil port, the first piston drives the pressure rod to move in a second direction.

[0012] In an available embodiment, the tail seat assembly further comprises a guide assembly, which comprises: An elastic member and a shaft pin, a sink is arranged on the draw hook, the elastic member is arranged in the sink, and the shaft pin is arranged on the elastic member and used to abut against the pressure rod.

[0013] In an available embodiment, the tail seat assembly further comprises a limiting assembly, which comprises: A limiting plate and a proximity switch, the limiting plate is used to be connected to the shell of the driving assembly, a long hole is arranged on the limiting plate, and the proximity switch is connected to the cylinder through the long hole and used to detect the driving position of the cylinder.

[0014] In an embodiment, the tailstock assembly further comprises: a tailstock assembly comprising a sleeve and a movable tailstock movably arranged in the sleeve, the sleeve being connected to the seat body; a driving oil channel and a brake lever, the driving oil channel being communicated to the brake lever, the brake lever being used to drive the movable tailstock; a locking assembly, the locking assembly being connected to the driving oil channel in parallel with the tailstock assembly, the locking assembly being used to lock the brake lever in abnormal driving oil channel conditions.

[0015] In an embodiment, the locking assembly comprises: a brake box arranged on one side of the brake lever, the brake box being formed with a third oil port; a second piston arranged in the brake box; a disc spring arranged in the second piston and the brake box; wherein a first tooth is formed on one side of the second piston facing the brake lever, and a second tooth is formed on one side of the brake lever facing the second piston, in the case of injecting hydraulic oil into the third oil port, the second piston is away from the brake lever, and in the case of stopping injecting hydraulic oil into the third oil port, the second tooth is in abutment with the first tooth.

[0016] According to a second aspect of the embodiments of the present application, a machine tool is provided, comprising: the tailstock assembly according to any of the above technical solutions.

[0017] Compared with the prior art, the present application has at least the following beneficial effects: The tailstock assembly provided by the embodiments of the present application comprises a tailstock assembly, a pull hook, a guide rail and a driving assembly. When the tailstock assembly is working, the oil cylinder in the driving assembly is the core power source. When locking is required, the oil cylinder drives the pressing rod to move in the first direction. Because the side of the pressing rod in contact with the seat body is a slope, the slope effect will be transmitted to the seat body, driving the pull hook connected to the seat body to move synchronously, so that the pull hook gradually approaches and connects the guide rail on one side of the base. At this time, the tailstock assembly enters the locking state. When unlocking is required, the oil cylinder drives the pressing rod to move in the second direction. The direction of the slope effect changes, and the seat body drives the pull hook to gradually separate from the guide rail, so that the tailstock assembly switches to the unlocking state. During the whole process, the base provides mounting support for the tailstock assembly, the pull hook, the guide rail and other components, ensuring that the components move in coordination and order.

[0018] The tailstock assembly provided by the embodiment of the present application realizes the precise connection or disconnection of the pull hook and the guide rail by means of the oil cylinder driving the pressing rod, in combination with the cooperation of the pressing rod slope and the seat body, the action transmission is direct and efficient, the lag problem of the traditional locking mode is avoided, and the response speed of locking and unlocking is improved. In terms of stability, the cooperation of the pull hook and the guide rail and the slope contact of the pressing rod and the seat body make the connection close when locking and the separation smooth when unlocking, so that the tailstock assembly is not prone to looseness in the locked state and moves flexibly in the unlocked state, effectively improving the overall operation stability of the tailstock assembly, providing reliable protection for the precise positioning of the workpiece during machine tool machining, and reducing the machining errors caused by locking / unlocking problems.

[0019] The above description is only a summary of the technical solutions of the present application, in order to more clearly understand the technical means of the present application, the content of the specification can be implemented, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0020] By reading the detailed description of the preferred embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of illustrating the preferred embodiments and are not considered limiting to the present application. Moreover, the same reference symbols are used throughout the drawings to represent the same parts. In the drawings: Figure 1 An angle cross-sectional schematic structural view of the tailstock assembly of one embodiment provided by the present application; Figure 2 An angle schematic structural view of the tailstock assembly of one embodiment provided by the present application; Figure 3 Another angle schematic structural view of the tailstock assembly of one embodiment provided by the present application; Figure 4 Still another angle schematic structural view of the tailstock assembly of one embodiment provided by the present application; Figure 5 A partial enlarged view of A in FIG. 1; Figure 4 Figure 6 A schematic structural view of the locking assembly of the tailstock assembly of one embodiment provided by the present application.

[0021] Among them, Figures 1 to 6 The correspondence between the reference signs and the component names is as follows: 110 tailstock assembly, 120 pull hook, 130 guide rail, 140 driving assembly, 150 first lubricating oil supply path, 160 second lubricating oil supply path, 170 guide assembly, 180 limiting assembly; ​111 base, 112 seat, 1121 body, 1122 pressing block; 141 pressing rod, 142 oil cylinder, 1421 cylinder body, 1422 first piston, 1423 connecting rod, 1424 first oil port, 1425 second oil port; 171 elastic member, 172 shaft pin; 181 limit plate, 182 proximity switch; 210 top tip assembly, 220 brake lever, 230 locking assembly; 211 sleeve, 212 movable top tip; 231 brake box, 232 third oil port, 233 second piston, 234 disc spring. DETAILED DESCRIPTION

[0022] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the technical solutions provided by the present application. However, it will be apparent to one of ordinary skill in the art that the technical solutions provided by the present application can be practiced without one or more of these specific details.

[0023] It should be noted that the terms used herein are only used to describe specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise. In addition, it should be understood that when the terms "comprise" and / or "include" are used in the specification, it means that the stated features, integers, steps, operations, elements, and / or components exist, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or combinations thereof.

[0024] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in various different forms, and should not be interpreted as being limited to the embodiments set forth herein. It should be understood that the embodiments are provided so that the disclosure of the present application is complete and complete, and the concepts of the exemplary embodiments are sufficiently conveyed to those of ordinary skill in the art.

[0025] As Figures 1 to 3As shown, according to the first aspect of the embodiments of the present application, a tailstock assembly is provided, which comprises: a tailstock component 110, the tailstock component 110 comprising a base 111 and a seat body 112, the seat body 112 being arranged on the base 111; a pull hook 120, the pull hook 120 being arranged in the base 111 and connected to the seat body 112; a guide rail 130, the guide rail 130 being arranged on one side of the base 111, the tailstock assembly being in a locked state when the pull hook 120 is connected to the guide rail 130, and the tailstock assembly being in an unlocked state when the pull hook 120 is disconnected from the guide rail 130; and a driving component 140, the driving component 140 comprising a pressing rod 141 and an oil cylinder 142, the contact side of the pressing rod 141 with the seat body 112 being a slope, the pull hook 120 being connected to the guide rail 130 when the pressing rod 141 moves in a first direction, and the pull hook 120 being disconnected from the guide rail 130 when the pressing rod 141 moves in a second direction.

[0026] The tailstock assembly provided by the embodiments of the present application comprises the tailstock component 110, the pull hook 120, the guide rail 130 and the driving component 140, and the oil cylinder 142 in the driving component 140 is the core power source when the tailstock assembly is working. When locking is required, the oil cylinder 142 drives the pressing rod 141 to move in the first direction, the slope of the contact side of the pressing rod 141 with the seat body 112 will be transmitted to the seat body 112, thereby driving the pull hook 120 connected to the seat body 112 to move synchronously, so that the pull hook 120 gradually approaches and connects to the guide rail 130 on one side of the base 111, and at this time, the tailstock assembly enters the locked state. When unlocking is required, the oil cylinder 142 drives the pressing rod 141 to move in the second direction, the direction of the slope changes, the seat body 112 drives the pull hook 120 to gradually disconnect from the guide rail 130, and the tailstock assembly switches to the unlocked state. During the whole process, the base 111 provides mounting support for the tailstock component 110, the pull hook 120, the guide rail 130 and other components, and ensures that the components move in coordination and order.

[0027] The tailstock assembly provided by the embodiments of the present application drives the pressing rod 141 by means of the oil cylinder 142, and realizes the precise connection or disconnection of the pull hook 120 and the guide rail 130 by combining the slope of the pressing rod 141 with the seat body 112, so that the action transmission is direct and efficient, the lag problem of the traditional locking mode is avoided, and the response speed of locking and unlocking is improved. In terms of stability, the cooperation of the pull hook 120 and the guide rail 130 and the slope contact of the pressing rod 141 and the seat body 112 ensure that the connection is tight when locking and the separation is smooth when unlocking, so that the tailstock assembly is not prone to looseness in the locked state and moves flexibly in the unlocked state, effectively improves the overall running stability of the tailstock assembly, provides reliable protection for the precise positioning of the workpiece during machine tool machining, and reduces the machining errors caused by locking / unlocking problems.

[0028] As Figures 1 to 3As shown, in an embodiment, the seat body 112 includes a body 1121 arranged on the base 111, and a pressing block 1122 slidingly connected to the body 1121, and the pull hook 120 is connected to the pressing block 1122.

[0029] In the technical solution, the seat body 112 can include the body 1121 and the pressing block 1122 slidingly connected to the body 1121, and the pull hook 120 is connected to the pressing block 1122. When the tailstock assembly is in operation, the oil cylinder 142 drives the pressing rod 141 to move in the first direction, and the inclined surface of the pressing rod 141 acts on the pressing block 1122 slidingly connected to the body 1121, pushing the pressing block 1122 to slide along the body 1121, and further driving the pull hook 120 connected to the pressing block 1122 to approach the side guide rail 130 of the base 111. The pull hook 120 is connected to the guide rail 130, and the assembly is locked. When unlocking is needed, the oil cylinder 142 drives the pressing rod 141 to move in the second direction, and the force acting on the inclined surface changes, the pressing block 1122 slides reversely, and the pull hook 120 is separated from the guide rail 130 along with the pressing block 1122, and the assembly is unlocked. The body 1121 is fixed to the base 111, providing stable support for the sliding of the pressing block 1122 and ensuring the coherent action of the components. The pressing block 1122 is slidingly connected to the body 1121, limiting the action track of the pull hook 120, avoiding the deviation of the pull hook 120, making the butt joint of the pull hook 120 and the guide rail 130 more accurate, improving the reliability of locking and unlocking, and reducing the locking failure caused by the misplacement of the components. The pressing block 1122 can more evenly transmit the force acting on the inclined surface of the pressing rod 141 to the pull hook 120, avoiding the damage of the components caused by excessive local force, and prolonging the service life of the pull hook 120 and the pressing rod 141. At the same time, the sliding design of the pressing block 1122 makes the force transmission more smooth, reduces the probability of action jamming, and keeps the stability of the assembly in frequent locking and unlocking operations, providing protection for the continuity and precision of machine tool processing.

[0030] In some examples, the pressing block 1122 is formed with a U-shaped groove facing the guide rail 130, which can greatly reduce the contact area of the pressing block 1122 with related components when moving, reduce the friction resistance from the structure, make the sliding of the pressing block 1122 along the body 1121 more smooth, and avoid the action jamming caused by excessive friction. At the same time, the smaller contact area can reduce the friction loss, prolong the service life of the pressing block 1122 and the cooperating components, ensure the coherence of the locking / unlocking action of the tailstock assembly, and indirectly improve the overall operation efficiency and stability.

[0031] As 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.

[0032] In some examples, there are two rails 130, each rail 130 has two hooks 120, and there can be four hooks 120.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] As Figures 1 to 3 shown, in a possible implementation, the oil cylinder 142 comprises: a cylinder body 1421, the first oil port 1424 and the second oil port 1425 are arranged on the cylinder body 1421; a first piston 1422 arranged in the cylinder body 1421; a connecting rod 1423, one end of the connecting rod 1423 is connected to the first piston 1422, and the other end of the connecting rod 1423 is connected to the pressing rod 141; wherein when the cylinder body 1421 is filled with oil through the first oil port 1424 and discharges oil through the second oil port 1425, the first piston 1422 drives the pressing rod 141 to move in the first direction; wherein when the cylinder body 1421 is filled with oil through the second oil port 1425 and discharges oil through the first oil port 1424, the first piston 1422 drives the pressing rod 141 to move in the second direction.

[0037] In this technical solution, when the tail seat assembly needs to be locked, hydraulic oil enters through the first oil port 1424 of the cylinder body 1421 and discharges from the second oil port 1425. The entering hydraulic oil pushes the first piston 1422 in the cylinder body 1421 to move, and the connecting rod 1423 connected to the first piston 1422 is linked to move, thereby driving the pressing rod 141 connected at the other end to move in the first direction. The pressing rod 141 acts on the pressing block 1122 through the inclined surface, so that the drag hook 120 approaches and connects the guide rail 130, and the locking is completed. When unlocking is needed, the hydraulic oil is switched to enter through the second oil port 1425 and discharge through the first oil port 1424, the first piston 1422 moves reversely, the connecting rod 1423 drives the pressing rod 141 to move in the second direction, and the pressing block 1122 drives the drag hook 120 to separate from the guide rail 130, so as to realize the unlocking. The whole process is controlled by the oil inlet and outlet to control the piston movement, and then drive the pressing rod 141 to act. The oil cylinder 142 is controlled by the double oil ports to enter and discharge oil, which can accurately drive the first piston 1422 to move in both directions, and then realize the stable bidirectional action of the pressing rod 141, so as to ensure that the drag hook 120 and the guide rail 130 are more reliably connected or separated, and avoid action jamming or deviation. The connecting rod 1423 transmits the piston power, so that the force transmission is more direct and efficient, and the energy loss is reduced. Compared with the traditional mechanical driving, the hydraulic driving mode has faster response speed and stable driving force, and can adapt to the needs of the tail seat assembly for locking and unlocking force in different working conditions, and improve the overall operation stability.

[0038] As Figures 1 to 3 shown, in a possible implementation, the tail seat assembly further comprises: a guide assembly 170, the guide assembly 170 comprises: an elastic piece 171 and a shaft pin 172, a sunken groove is arranged on the drag hook 120, the elastic piece 171 is arranged in the sunken groove, and the shaft pin 172 is arranged on the elastic piece 171, and the shaft pin 172 is used for abutting against the pressing rod 141.

[0039] In the technical solution, the tailstock assembly can include a guide assembly 170, which can include an elastic member 171 and a shaft pin 172. The shaft pin 172 is always in abutment with the pressing rod 141 under the action of the elastic member 171, forming real-time fitting support and positioning, which can limit the lateral deviation of the pressing rod 141 during movement, avoid the tilting of the pressing rod 141 due to uneven force, and ensure the smooth movement of the pressing rod 141 in the preset direction. At the same time, the limiting of the sink groove to the elastic member 171 makes the elastic force output of the elastic member 171 more stable, and the support force of the shaft pin 172 to the pressing rod 141 is continuous and uniform, reducing the vibration or jamming of the pressing rod 141 during movement. This stable guide and support enable the pressing rod 141 to accurately transmit driving force to the pressing block 1122 and the draw hook 120, ensuring accurate and reliable locking / unlocking action and avoiding component fitting errors caused by the deviation of the pressing rod 141.

[0040] As shown in Figures 1 to 3 In a possible implementation, the tailstock assembly further includes a limiting assembly 180, which includes a limiting plate 181 and a proximity switch 182. The limiting plate 181 is connected to the housing of the driving assembly 140, and a long slot is formed in the limiting plate 181. The proximity switch 182 passes through the long slot and is connected to the oil cylinder 142, and is used to detect the driving position of the oil cylinder 142.

[0041] In the technical solution, the tailstock assembly can further include a limiting assembly 180, which can include a limiting plate 181 and a proximity switch 182. The limiting assembly 180 can accurately control the driving position of the oil cylinder 142. The proximity switch 182 is connected to the oil cylinder 142 through the long slot of the limiting plate 181, which can detect the action stroke of the oil cylinder 142 in real time, avoid excessive force damage to components such as the pressing rod 141 and the draw hook 120 caused by overtravel of the oil cylinder 142, and ensure that the actions of various assemblies are within a safe range. The long slot provides installation and adjustment space for the proximity switch 182, which facilitates the fine adjustment of the detection position according to the actual working conditions and adapts to different locking / unlocking requirements. At the same time, by accurately detecting the position of the oil cylinder 142, the oil inlet and outlet switching can be triggered in time, ensuring that the pressing rod 141 moves to the correct position, so that the draw hook 120 accurately docks with or separates from the guide rail 130, improving the accuracy and reliability of the locking / unlocking of the tailstock assembly.

[0042] As shown in Figures 1 to 6 In a possible implementation, the tailstock assembly further includes a tailstock assembly 210, which includes a sleeve 211 and a movable tailstock 212 movably arranged in the sleeve 211. The sleeve 211 is connected to the seat body 112. A driving oil way and a brake lever 220 are connected to the brake lever 220. The brake lever 220 is used to drive the movable tailstock 212. A locking assembly 230 is connected in parallel to the driving oil way and the tailstock assembly 210. The locking assembly 230 is used to lock the brake lever 220 in the event of abnormal conditions of the driving oil way.

[0043] In the technical scheme, further provided is the structural composition of the tailstock assembly, the tailstock assembly can further include a tailstock center assembly 210, a driving oil circuit, a brake lever 220, and a locking assembly 230. When the tailstock center assembly 210 is working, the driving oil circuit delivers hydraulic oil to the brake lever 220, the pressure of the hydraulic oil drives the brake lever 220 to act, and the brake lever 220 further drives the movable tailstock center 212 in the sleeve 211 to move, so as to realize the extension or retraction of the movable tailstock center 212 to adapt to the workpiece support requirement. When extended, the movable tailstock center 212 can tightly abut against the workpiece to provide stable support for machining, and when retracted, the workpiece can be conveniently loaded and unloaded. The locking assembly 230 is connected in parallel with the tailstock center assembly 210 on the driving oil circuit, and does not interfere with the movement of the brake lever 220 and the movable tailstock center 212 when normal oil supply. When abnormal conditions such as interruption of oil supply and sudden pressure drop occur in the driving oil circuit, the locking assembly 230 is quickly started to lock the brake lever 220, so as to prevent the brake lever 220 and the movable tailstock center 212 from moving accidentally and ensure the stable positioning of the workpiece. The movable tailstock center 212 can be accurately adjusted in length through the brake lever 220, can tightly abut against workpieces of different specifications, can provide reliable support for machining, can reduce workpiece vibration, and can improve machining precision. From the perspective of safety protection, the locking assembly 230 quickly locks the brake lever 220 when the oil circuit is abnormal, so as to avoid the workpiece from being deviated or falling off due to accidental movement of the movable tailstock center 212, and reduce the risk of damage to the equipment and the workpiece. At the same time, the cooperation of the driving oil circuit and the brake lever 220 enables the movable tailstock center 212 to move quickly in response, so as to adapt to the requirements of high-frequency workpiece loading and unloading and machining of the machine tool and ensure the continuity of production.

[0044] In some examples, the abnormal condition of the driving oil circuit includes a circuit break or insufficient oil supply of the driving oil circuit.

[0045] In a possible implementation, the locking assembly 230 includes a brake box 231, the brake box 231 is arranged on one side of the brake lever 220, and a third oil port 232 is formed in the brake box 231; a second piston 233 is arranged in the brake box 231; a disc spring 234 is arranged in the second piston 233 and the brake box 231; wherein the side of the second piston 233 facing the brake lever 220 is provided with a first tooth, and the side of the brake lever 220 facing the second piston 233 is provided with a second tooth. In the case that hydraulic oil is injected into the third oil port 232, the second piston 233 is away from the brake lever 220, and in the case that the injection of hydraulic oil into the third oil port 232 is stopped, the second tooth abuts against the first tooth.

[0046] In the technical solution, the structure of the locking assembly 230 is further provided, which can include a brake box 231, a second piston 233, and a disc spring 234. When the locking assembly 230 works, because the locking assembly 230 is connected in parallel with the top assembly 210 to the driving oil circuit, the oil supply state of the third oil port 232 changes synchronously with the driving oil circuit. When the driving oil circuit is normally supplied with oil, hydraulic oil is injected into the brake box 231 through the third oil port 232, and the second piston 233 in the brake box 231 is pushed to move away from the brake lever 220. In the process, the disc spring 234 between the second piston 233 and the brake box 231 is compressed. At this time, the first tooth on the second piston 233 is separated from the second tooth of the brake lever 220, and the brake lever 220 can freely act to drive the movable top 212. When the driving oil circuit is abnormal (for example, the oil supply is interrupted), the third oil port 232 stops injecting oil, the disc spring 234 is elastically reset, the second piston 233 is pushed to move towards the brake lever 220, and the first tooth is in abutment with the second tooth, thereby locking the brake lever 220 and preventing it from driving the movable top 212 to move unexpectedly. The locking assembly 230 can quickly respond when the oil circuit is abnormal, reliably lock the brake lever 220 through the tooth engagement, avoid the movable top 212 from moving unexpectedly to cause the workpiece to deviate or fall off, and ensure the machining safety and the workpiece precision. In terms of stability, the locking mode of tooth engagement has strong fastening, can withstand a large external force, and the elastic force of the disc spring 234 is stable, which can ensure the continuous and reliable locking state. At the same time, the tooth separation does not interfere with the action of the brake lever 220 when the oil is normally supplied, and the normal operation efficiency of the equipment and the safety guarantee under abnormal conditions are considered.

[0047] In some examples, the tailstock assembly can also include a locking position switch to detect the position of the brake lever 220.

[0048] As shown in Figures 1 to 6 According to the second aspect of the embodiments of the present application, a machine tool is provided, which includes the tailstock assembly according to any one of the above technical solutions.

[0049] The machine tool provided by the embodiments of the present application includes the tailstock assembly according to any one of the above technical solutions, and therefore has all the beneficial effects of the tailstock assembly according to the above technical solutions, which will not be repeated here.

[0050] In some examples, the machine tool can also include a worktable, and the tailstock assembly is arranged at one end of the worktable.

[0051] In the present application, the terms "first", "second", "third" are only used for descriptive purpose, and should not be understood as indicating or implying relative importance. The term "multiple" refers to two or more, unless otherwise explicitly limited. The terms "mount", "connect", "connection", "fix", and the like should be interpreted broadly, for example, "connection" can be fixed connection, or detachable connection, or integral connection; "connection" can be direct connection, or indirect connection through intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0052] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or unit referred to must have a particular direction, be constructed and operated in a particular orientation, therefore, should not be understood as a limitation on the present application.

[0053] In the description of the present application, the terms "one embodiment", "some embodiments", "a specific embodiment", and the like, mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0054] The above is only the preferred embodiment of the present application, and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

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. The 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.

2. The tailstock assembly according to claim 1, characterized in that, 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.

3. The tailstock assembly according to claim 2, 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.

4. The tailstock assembly according to claim 2, characterized in that, Also includes: 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.

5. The tailstock assembly according to claim 1, characterized in that, 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 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.

6. The tailstock assembly according to claim 1, characterized in that, Also includes: 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.

7. 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.

8. The tailstock assembly according to claim 1, characterized in that, Also includes: 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.

9. The tailstock assembly according to claim 8, 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.

10. A machine tool, characterized in that, include: The tailstock assembly as described in any one of claims 1 to 9.

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