Tailstock locking structure of numerical control lathe

Abstract

The utility model relates to the technical field of parts for machine tools, in particular to a numerically controlled lathe tailstock locking structure which comprises a tailstock body, a lathe body and a linear guide rail, the tailstock body and the lathe body are connected in a sliding mode through the linear guide rail, and the numerically controlled lathe tailstock locking structure is further provided with a locking structure body used for locking the tailstock body and the lathe body and comprises a locking rod. The locking rod penetrates through the tailstock body and is connected with the tailstock body in a rotating structure mode, a left-hand thread section and a right-hand thread section are arranged on the peripheral face of the lower portion of the locking rod, the shaft shoulder is arranged on the peripheral face of the locking rod in a fixed structure mode, and the shaft shoulder limits the up-down moving range of the locking rod. The upper pressing plate and the lower pressing plate are used for clamping the side edge of a lathe bed and are connected with the left-hand thread section and the right-hand thread section respectively in a thread meshing mode, the locking rod is fixed in the axial direction through the design of the shaft shoulder, the upper pressing plate is separated from the side edge after unlocking, friction interference does not exist, smooth operation of the tailstock body is guaranteed, and the service life of the tailstock body is prolonged. And the service lives of the side edges and the upper pressing plate are prolonged.

Description

Technical field:

[0001] The present application relates to the technical field of machine tool components, and in particular to a tailstock locking structure for a CNC lathe. Background technology:

[0002] The tailstock is an important component of a CNC lathe. It is mainly used to tighten long shaft parts so that the parts do not swing randomly during processing. Therefore, it is very important to ensure the reliability of the tailstock operation and the convenience of maintenance.

[0003] The Chinese utility model patent with application number 201310621311.5 - tailstock locking mechanism, includes a tailstock upper body, a tailstock lower body connected to the lower part of the tailstock upper body, and linear guide rails are provided between the lower sides of the tailstock lower body and the bed; an upper pressure plate and a lower pressure plate are provided in the middle part of the lower part of the tailstock lower body, and the guide bolt passes through the rear end of the lower pressure plate and the upper pressure plate and is connected to the lower tailstock body, and the two sides of the upper pressure plate and the lower pressure plate clamp the inward side of the bed, a left-handed nut is fixed on the upper pressure plate, and a right-handed nut is fixed on the lower pressure plate, and the locking screws are matched with the left-handed nut and the right-handed nut respectively, and an upward boss is provided in the middle of the upper pressure plate, which is inserted into the groove on the tailstock lower body.

[0004] When the locking structure is relaxed, the upper pressure plate will interfere with the locking part on the inner side of the bed, thereby forming sliding friction, hindering the smooth movement of the tailstock, and long-term sliding friction will cause serious wear on the locking part on the inner side of the bed, reducing the locking effect; but because the locking part on the inner side of the bed is integrated with the bed, it cannot be replaced and other design defects. Utility model content:

[0005] To solve the above technical problems, the present invention provides a tailstock locking structure for a CNC lathe. The technical problem to be solved is that after unlocking, the upper pressure plate will interfere with the locking portion on the inner side of the bed, thereby causing sliding friction and hindering the smooth movement of the tailstock. To solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A tailstock locking structure for a CNC lathe comprises a tailstock body, a bed and a linear guide rail, wherein the tailstock body and the bed are slidably connected via the linear guide rail, and a locking structure for locking the tailstock body and the bed is further provided, wherein the locking structure comprises:

[0007] A locking rod is provided through the tailstock body and is connected to the tailstock body in a rotating structure. A left-hand thread section and a right-hand thread section are provided on the circumference of the lower portion of the locking rod;

[0008] A shoulder that limits the upward and downward range of motion of the locking rod, the shoulder being arranged on the outer peripheral surface of the locking rod in a fixed structure;

[0009] The upper and lower pressing plates are used to clamp the sides of the bed, and the upper and lower pressing plates are respectively connected to the left-handed thread section and the right-handed thread section through thread engagement;

[0010] A guide screw is connected to one of the upper pressing plate or the lower pressing plate in a fixed structure, and is connected to the other of the upper pressing plate or the lower pressing plate in a sliding structure.

[0011] Furthermore, an embedding groove for embedding a shaft shoulder is provided at the upper end of the tailstock body.

[0012] Furthermore, a pressure cover is provided on the upper part of the shaft shoulder, and the pressure cover is connected to the tailstock body through bolts.

[0013] Furthermore, the guide screw passes through the lower pressing plate from bottom to top, the guide screw and the upper pressing plate are fixed by threaded engagement, and the guide screw and the lower pressing plate are connected by a sliding structure.

[0014] Furthermore, the side is a locking rail, which is connected to the bed through bolts.

[0015] The beneficial effects of the utility model are as follows: the locking rod is fixed axially by the design of the shaft shoulder, and the upper pressure plate is separated from the side after unlocking, and there is no friction interference, thereby ensuring the smooth operation of the tailstock body and extending the service life of the side and the upper pressure plate.

[0016] The locking rail is fixed to the bed with bolts. During the production of the machine tool, the locking rail can be subjected to special treatments such as quenching, which reduces the production cost of the machine tool. When the locking rail is damaged, it can be replaced, which reduces the cost of subsequent machine tool maintenance and modification. Description of the drawings:

[0017] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model.

[0018] In the picture:

[0019] 1. Tailstock body, 2. Bed, 3. Linear guide, 4. Locking rod, 5. Left-handed thread section, 6. Right-handed thread section, 7. Shoulder, 8. Upper pressure plate, 9. Lower pressure plate, 10. Guide screw, 11. Pressure cover, 12. Locking rail. Specific implementation method:

[0020] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will now be described in further detail with reference to the accompanying drawings and the following examples so that the public can better understand the implementation method of the present invention. The specific implementation scheme of the present invention is as follows:

[0021] The tailstock locking structure of a CNC lathe comprises a tailstock body 1, a bed 2 and a linear guide 3. The tailstock body 1 is slidably connected to the bed 2 by the linear guide 3. A locking structure is also provided for locking the tailstock body 1 and the bed 2. The characterised in that the locking structure comprises a locking rod 4, which is arranged through the tailstock body 1 and is connected to the tailstock body 1 in a rotating structure manner. A left-handed thread segment 5 and a right-handed thread segment 6 are provided on the circumferential surface of the locking rod 4 at the lower portion, and a shoulder 7 is arranged on the outer circumferential surface of the locking rod 4 in a fixed structure manner, and the shoulder 7 limits the upper and lower movable range of the locking rod 4; an upper pressing plate 8 and a lower pressing plate 9 for clamping the side 12 of the bed 2, the upper pressing plate 8 and the lower pressing plate 9 are respectively connected to the left-handed thread segment 5 and the right-handed thread segment 6 by threaded engagement; one of the upper pressing plate 8 or the lower pressing plate 9 is connected to a guide screw 10 in a fixed structure, and the guide screw 10 is connected to the other of the upper pressing plate 8 or the lower pressing plate 9 in a sliding structure manner. The locking rod 4 is fixed axially by the design of the shaft shoulder 7. After unlocking, the upper pressure plate 8 is separated from the side 12 without friction interference, thereby ensuring the smooth operation of the tailstock body 1 and extending the service life of the side 12 and the upper pressure plate 8.

[0022] It should be noted that a groove for embedding the shaft shoulder 7 is provided at the upper end of the tailstock body 1 , and a pressure cover 11 is provided on the upper part of the shaft shoulder 7 . The pressure cover 11 is connected to the tailstock body 1 by bolts, which can play a dust-proof role.

[0023] Specifically, the guide screw 10 passes through the lower pressure plate 9 from bottom to top, and the guide screw 10 is fixed to the upper pressure plate 8 by threaded engagement. The guide screw 10 is connected to the lower pressure plate 9 by a sliding structure, which guides the upper and lower pressure plates and ensures that they move up and down without relative rotation.

[0024] The side is a locking rail 12, which is connected to the bed 2 by bolts. When the machine tool is produced, the locking rail can be subjected to special treatments such as quenching separately, which reduces the production cost of the machine tool. When the locking rail is damaged, it can be replaced, reducing the cost of subsequent machine tool maintenance and modification.

[0025] The working principle and working process of this utility model are as follows:

[0026] When the locking structure needs to be loosened, the locking rod 4 is rotated. Due to the restrictive relationship between the boss on the upper end face of the upper pressure plate 8 and the circular pit at the lower part of the tailstock body 1, only the boss is allowed to move up and down, and it is not allowed to rotate. This is the existing technology. Since the left-handed thread segment 5 and the right-handed thread segment 6 are respectively engaged with the threads of the upper pressure plate 8 and the lower pressure plate 9, the upper pressure plate 6 and the lower pressure plate 7 move in opposite directions. Since the upper shoulder of the locking rod 4 is axially fixed in the embedded groove, the upper pressure plate 6 and the lower pressure plate 7 both leave the locking rail, thereby relaxing the entire locking structure.

[0027] In the description of the present invention, it should be understood that the terms "center", "upper", "lower", "left", "right", "front", "back", "lower left", "upper right", "outer", "clockwise", "counterclockwise", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as limiting the scope of protection of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. Although the present invention has been described based on a limited number of embodiments, those skilled in the art, with the benefit of the above description, should understand that other embodiments are conceivable within the scope of the present invention described herein.

Claims

1. A tailstock locking structure for a CNC lathe, comprising a tailstock body (1), a bed (2) and a linear guide rail (3), wherein the tailstock body (1) and the bed (2) are slidably connected via the linear guide rail (3), and a locking structure for locking the tailstock body (1) and the bed (2) is provided, characterized in that: The locking structure includes: A locking rod (4), the locking rod (4) is arranged through the tailstock body (1) and is connected to the tailstock body (1) in a rotating structure, and a left-handed thread section (5) and a right-handed thread section (6) are arranged on the circumference of the lower portion of the locking rod (4); A shaft shoulder (7) for limiting the upper and lower movable ranges of the locking rod (4), the shaft shoulder (7) being arranged on the outer peripheral surface of the locking rod (4) in a fixed structural manner; An upper pressing plate (8) and a lower pressing plate (9) for clamping the side of the bed (2), wherein the upper pressing plate (8) and the lower pressing plate (9) are respectively connected to the left-handed thread section (5) and the right-handed thread section (6) by thread engagement; The guide screw (10) is connected to one of the upper pressing plate (8) or the lower pressing plate (9) in a fixed structure, and the guide screw (10) is connected to the other of the upper pressing plate (8) or the lower pressing plate (9) in a sliding structure.

2. The tailstock locking structure of a CNC lathe according to claim 1, characterized in that: The upper end of the tailstock body (1) is provided with an embedding groove for embedding a shaft shoulder (7).

3. The tailstock locking structure of a CNC lathe according to claim 2, characterized in that: A pressure cover (11) is provided on the upper portion of the shaft shoulder (7), and the pressure cover (11) is connected to the tailstock body (1) via bolts.

4. The tailstock locking structure of a CNC lathe according to claim 1, characterized in that: The guide screw (10) passes through the lower pressing plate (9) from bottom to top, the guide screw (10) and the upper pressing plate (8) are fixed by thread engagement, and the guide screw (10) and the lower pressing plate (9) are connected by a sliding structure.

5. The tailstock locking structure of a CNC lathe according to claim 1, characterized in that: The side is a locking rail (12), which is connected to the bed (2) through bolts.

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