Hydraulic tailstock locking mechanism of rectangular guide rail

Abstract

The utility model discloses a hydraulic tailstock locking mechanism of a rectangular guide rail, which relates to the technical field of machine tool processing equipment, and comprises a main body which is arranged on a lathe tailstock or a servo center frame and is contacted with the rectangular guide rail, at least one hydraulic cylinder arranged on the main body, and a pressing plate arranged on a piston rod of the hydraulic cylinder, the rectangular guide rail is positioned between the pressing plate and the main body; a belleville spring is arranged in a cylinder barrel of the hydraulic cylinder, and when no oil pressure exists in the cylinder barrel, the elastic force of the belleville spring enables a piston and a piston rod of the hydraulic cylinder to drive the pressing plate to clamp the rectangular guide rail.

Description

Technical Field

[0001] The utility model belongs to the technical field of machine tool processing equipment, and particularly relates to a hydraulic tailstock locking mechanism for a rectangular guide rail. Background Technique

[0002] In machine tool processing, both the lathe tailstock and the servo center rest can slide on the rectangular guide rail of the machine tool to adapt to workpieces of different lengths. During the processing, the locking mechanism is an essential component. Its function is to lock the lathe tailstock and the servo center rest to the rectangular guide rail to prevent the lathe tailstock and the servo center rest from moving during the processing, which may cause damage to the workpiece.

[0003] The existing locking mechanisms mostly adopt hydraulic locking mechanisms. The principle is to set hydraulic cylinders on the lathe tailstock and the servo center rest. The piston rod of the hydraulic cylinder or the clamping plate on the piston rod contacts the rectangular guide rail. The hydraulic cylinder applies frictional force to the rectangular guide rail through the piston rod or the clamping plate to lock the lathe tailstock and the servo center rest. This method is simple and effective, but if the hydraulic system fails, it will cause the lathe tailstock or the servo center rest to loosen, resulting in workpiece damage. Content of the Utility Model

[0004] In order to overcome the problems existing in the background technique, the utility model provides a hydraulic tailstock locking mechanism for a rectangular guide rail.

[0005] To achieve the above object, the utility model is realized by the following technical solutions: A hydraulic tailstock locking mechanism for a rectangular guide rail, comprising: a main body in contact with the rectangular guide rail on the lathe tailstock or the servo center rest, at least one hydraulic cylinder provided on the main body, a pressing plate provided on the piston rod of the hydraulic cylinder, and the rectangular guide rail is located between the pressing plate and the main body; a disc spring is provided in the cylinder barrel of the hydraulic cylinder. When there is no oil pressure in the cylinder barrel, the elastic force of the disc spring causes the piston and the piston rod of the hydraulic cylinder to drive the pressing plate to clamp the rectangular guide rail.

[0006] Further, the piston rod penetrates through the pressing plate, and a nut is provided on the part of the piston rod protruding out of the pressing plate in a threaded fit manner.

[0007] Further, a plurality of disc springs are provided, and the plurality of disc springs are arranged in the cylinder barrel by the same-direction hybrid superposition method.

[0008] Advantages of the Utility Model

[0009] Compared with the prior art, when the piston rod of the hydraulic tailstock locking mechanism of the rectangular guide rail is not under the action of oil pressure, the piston and the piston rod are pushed by the disc spring to drive the pressure plate to apply frictional force to the rectangular guide rail, thereby locking the lathe tailstock or the servo center rest. When the hydraulic pump is started, the piston compresses the disc spring under the action of oil pressure, the piston rod drives the pressure plate downward, and the frictional force between the pressure plate and the rectangular guide rail decreases or even disappears, so that the position of the lathe tailstock or the servo center rest can be adjusted. Thus, the problem of loosening of the lathe tailstock or the servo center rest caused by damage to the hydraulic system is avoided. Brief Description of the Drawings

[0010] Figure 1 is a schematic structural diagram of the hydraulic tailstock locking mechanism of the rectangular guide rail;

[0011] Figure 2 is a schematic internal structure diagram of the hydraulic tailstock locking mechanism of the rectangular guide rail;

[0012] Figure 3 is a schematic sectional structure diagram of the hydraulic tailstock locking mechanism of the rectangular guide rail.

[0013] In the figure: main body 1, hydraulic cylinder 2, piston rod 3, pressure plate 4, disc spring 5, rectangular guide rail 6, cylinder barrel 7, oil inlet hole 8, exhaust hole 9, nut 10, piston 11. Detailed Embodiment

[0014] In order to make the objectives, technical solutions and beneficial effects of the present utility model clearer, the preferred embodiments of the present utility model will be described in detail below to facilitate understanding by those skilled in the art.

[0015] Please refer to Figures 1 to 3 , the present utility model provides a hydraulic tailstock locking mechanism for a rectangular guide rail, including: a main body 1 in contact with the rectangular guide rail 6 on a lathe tailstock or a servo center rest, at least one hydraulic cylinder 2 provided on the main body 1, a pressure plate 4 provided on a piston rod 3 of the hydraulic cylinder 2, and the rectangular guide rail 6 is located between the pressure plate 4 and the main body 1; a disc spring 5 is provided in a cylinder barrel 7 of the hydraulic cylinder 2, and when there is no oil pressure in the cylinder barrel 7, the elastic force of the disc spring 5 causes the piston 11 and the piston rod 3 of the hydraulic cylinder 2 to drive the pressure plate 4 to clamp the rectangular guide rail 6. The piston rod 3 passes through the main body 1 and is connected to the pressure plate. The main body 1 has a connection structure with the lathe tailstock or the servo center rest.

[0016] In this embodiment, the number of the hydraulic cylinders 2 is two. The hydraulic cylinder 2 is a prior art, and the cylinder barrel 7 further includes but is not limited to a cylinder head cover, an oil inlet hole 8 and an exhaust hole 9 provided on the cylinder body, as well as a hydraulic pump and a control system, which are all prior arts and will not be elaborated here.

[0017] The piston rod 3 penetrates through the pressing plate 4, and a nut 10 is threadedly fitted to the part of the piston rod 3 that penetrates out of the pressing plate 4. The nut 10 is used to fix the pressing plate 4 and at the same time enable the pressing plate 4 to be detachably replaced.

[0018] A plurality of disc springs 5 are provided. The plurality of disc springs 5 are arranged in the cylinder barrel 7 by the same-direction and reverse-direction hybrid stacking method. The same-direction and reverse-direction hybrid stacking method refers to the combined use of the same-direction stacking and reverse-direction stacking methods, that is, part of the disc springs 5 are stacked in the same direction and part are stacked in the reverse direction. The same-direction stacking method refers to stacking a plurality of disc springs 5 together in the same direction. The reverse-direction stacking method refers to stacking a plurality of disc springs 5 together in the opposite direction. The same-direction and reverse-direction hybrid stacking method can integrate the advantages of the same-direction stacking and reverse-direction stacking. It can not only increase the bearing capacity of the spring to a certain extent but also increase the stroke of the spring. The load and the stroke are both proportional and progressive. At the same time, it can also provide sufficient elastic force to lock the tailstock of the lathe and the servo center rest.

[0019] The principle of a hydraulic tailstock locking mechanism with a rectangular guide rail of the present utility model is as follows:

[0020] When the piston rod 3 is not under the action of oil pressure, under the action of the disc spring 5, the piston 11 and the piston rod 3 are pushed to drive the pressing plate 4 to apply a frictional force to the rectangular guide rail 6, thereby locking the tailstock of the lathe or the servo center rest. When the hydraulic pump is started, the piston 11 compresses the disc spring 5 under the action of oil pressure, and the piston rod 3 drives the pressing plate 4 downward. The frictional force between the pressing plate 4 and the rectangular guide rail 6 decreases or even disappears, so that the position of the tailstock of the lathe or the servo center rest can be adjusted.

[0021] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present utility model and are not restrictive. Although the present utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in terms of form and details without departing from the scope defined by the claims of the present utility model.

Claims

1. A hydraulic tailstock locking mechanism for a rectangular guide rail, characterized in that: include: A main body (1) in contact with the rectangular guide rail (6) on a lathe tailstock or a servo center frame, at least one hydraulic cylinder (2) arranged on the main body (1), a pressure plate (4) arranged on the piston 11 rod (3) of the hydraulic cylinder (2), and the rectangular guide rail (6) is located between the pressure plate (4) and the main body (1); a disc spring (5) is arranged in the cylinder barrel (7) of the hydraulic cylinder (2), and when there is no oil pressure in the cylinder barrel (7), the elastic force of the disc spring (5) causes the piston (11) and the piston rod (3) of the hydraulic cylinder (2) to drive the pressure plate (4) to clamp the rectangular guide rail (6).

2. A hydraulic tailstock locking mechanism for a rectangular guide rail according to claim 1, characterized in that: The piston rod (3) passes through the pressure plate (4), and the portion of the piston rod (3) that passes through the pressure plate (4) is threadedly matched with a nut (10).

3. The hydraulic tailstock locking mechanism of a rectangular guide rail according to claim 1, characterized in that: A plurality of the disc springs (5) are provided, and the plurality of disc springs (5) are arranged in the cylinder barrel (7) by a mixed stacking method in the same and opposite directions.

Images