An axial positioner

Abstract

The utility model provides a kind of axial positioner, belong to processing auxiliary equipment technical field.It solves the existing axial positioner installation inconvenient and other problems.This axial positioner, including the locating disc and locating screw with connecting hole, connecting hole is stepped hole, connecting hole is equipped with connecting column, the middle part of connecting column is conical, and its outer diameter increases along the direction of connecting column first end to second end, the first end of connecting column and the hole wall surface of connecting hole small hole diameter section form threaded connection, the hole wall surface of connecting hole large hole diameter section has the perforation along the radial direction of locating disc and penetrates the outer circumferential surface of locating disc, and the perforation has several and is evenly arranged along the circumferential direction of locating disc, and several steel balls are sequentially arranged and abutted in each perforation, the inner side of the innermost steel ball abuts on the outer conical surface of connecting column middle part, the outer side of the outermost steel ball can extend out of perforation, and locating screw is connected on connecting column along axial thread.This axial positioner is convenient to install.

Description

Technical Field

[0001] This utility model belongs to the technical field of processing auxiliary equipment and relates to an axial positioner. Background Technology

[0002] A lathe includes a headstock containing a rotatable spindle. A chuck is fixedly connected to the front end of the spindle to hold and fix the workpiece. When machining shaft-type parts, if the distance between the machining position and the clamping position is too large, the workpiece will generate a large bending moment during turning, causing increased vibration and a decrease in machining quality. To reduce this effect, the shaft-type part is usually inserted into the spindle, bringing the machining position closer to the clamping position. In this case, the lathe spindle is set as a hollow shaft, and the chuck as a hollow chuck. However, the hollow shaft and hollow chuck configuration has a problem: the shaft-type part cannot be directly contacted for axial positioning.

[0003] To achieve axial positioning during machining, an axial positioner is installed in the spindle or chuck for repeated axial positioning in batch machining of parts. For example, an axial positioning device for a CNC lathe's pneumatic three-jaw chuck [Publication No.: CN102962685A] disclosed in Chinese patent literature includes a CNC lathe's pneumatic three-jaw chuck, on which a positioning seat is installed. The positioning seat has a threaded hole, in which an axially adjustable positioning screw is installed. A positioning platform for positioning parts is provided at one end of the positioning screw, and a locking nut for locking the positioning screw is provided at the other end. The positioning seat has connecting holes for connecting to the CNC lathe's pneumatic three-jaw chuck, and the positioning seat is connected to the CNC lathe's pneumatic three-jaw chuck by bolts installed in the connecting holes. Three symmetrically distributed connecting holes are provided on the same circumference of the positioning seat.

[0004] When installing the axial positioning device in the chuck, the positioning seat is first placed into the chuck, and then three bolts need to be installed on the positioning seat in sequence. When installing the bolts, the bolts need to be rotated and tightened three times, which is not convenient to operate. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in the existing technology by proposing an axial positioner that solves the technical problem of inconvenient installation of existing axial positioners.

[0006] The objective of this utility model can be achieved through the following technical solutions: An axial positioner includes a disc-shaped positioning disk and a positioning screw. A connecting hole is provided at the center of the positioning disk. The connecting hole is a stepped hole, and a connecting post passes through it. The middle portion of the connecting post is conical, with its outer diameter increasing from one end to the other. The first end of the connecting post is threadedly connected to the wall of the small-diameter section of the connecting hole. The wall of the large-diameter section of the connecting hole has a perforation that radially penetrates the outer circumference of the positioning disk. Several perforations are evenly arranged circumferentially around the positioning disk. Each perforation contains several steel balls arranged radially and abutting against each other. The innermost steel ball abuts against the outer conical surface of the middle portion of the connecting post, while the outermost steel ball extends out of the perforation. The positioning screw is axially threaded onto the connecting post.

[0007] The positioning plate is placed inside the hollow spindle or hollow chuck, with the second end of the connecting column facing outwards. The connecting column is then rotated to move inwards. Because the middle part of the connecting column is conical, with its outer diameter increasing from the first to the second end, the outer conical surface of the middle part abuts against the inner side of the innermost steel ball, pushing the steel ball radially outwards along the positioning plate. Meanwhile, the outer side of the outermost steel ball extends out of the through-hole and abuts against the inner wall of the spindle or chuck. After tightening the connecting column, the positioning plate is locked onto the spindle or chuck by the connecting column and the steel balls. The positioning screw is then threaded onto the connecting column. After rotating to the desired position, rotation stops. When machining the workpiece, shaft-like parts abut against the outer end face of the positioning screw for axial positioning. Installing the positioning plate only requires rotating and tightening the connecting column once, compared to the existing technology which requires rotating and tightening bolts three times, making this axial positioner much easier to install.

[0008] In the aforementioned axial positioner, two symmetrically arranged positioning holes are formed on one end face of the positioning disc, with the second end of the connecting column extending out of the connecting hole. The orifice of the positioning hole faces the same direction as the extension of the second end of the connecting column. The positioning hole and the through hole are offset from each other circumferentially on the positioning disc. A clamp inserted into the positioning hole can hold the positioning disc, facilitating its placement into the chuck or spindle.

[0009] In the aforementioned axial positioner, the second end of the connecting column is hexagonal prism-shaped. This facilitates tightening the connecting column using a hexagonal socket wrench, making the axial positioner easy to install.

[0010] In the axial positioner described above, each through-hole has a necking ring at its outer end, the inner diameter of which is smaller than the outer diameter of the steel ball. The necking ring prevents the steel ball from falling out of the through-hole, thus facilitating installation of the axial positioner in the spindle or chuck.

[0011] In the aforementioned axial positioner, the outer circumferential surface of the connecting column has a shoulder, which is located between the first end of the connecting column and the outer conical surface of the middle part of the connecting column. The shoulder is used to axially limit the connecting column, preventing the outer conical surface of the middle part of the connecting column from contacting the thread of the small diameter section of the connecting hole and causing jamming, thus making the axial positioner easy to use.

[0012] In the aforementioned axial positioner, a first chamfer is provided between the end face of the first end of the connecting post and the outer peripheral surface of the connecting post. The first chamfer serves a guiding function, facilitating the insertion of the connecting post into the small-diameter section of the connecting hole and simplifying the assembly of the connecting post and the positioning plate.

[0013] In the aforementioned axial positioner, the outer circumferential surface of the positioning disk is stepped, and the small diameter section of the outer circumferential surface of the positioning disk corresponds to the small diameter section of the connecting hole. This facilitates the identification of the inner end of the positioning disk, making it easy to place the positioning disk into the spindle or chuck in the correct orientation, thus simplifying the installation of the axial positioner.

[0014] Compared with the prior art, the present invention has the following advantages: Insert the positioning plate into the spindle or chuck, then rotate the connecting column to lock the positioning plate against the spindle or chuck. The positioning device is easy to install; simply rotate and tighten the connecting column once. Attached Figure Description

[0015] Figure 1 This is a first-person perspective 3D view of this axial positioner.

[0016] Figure 2 This is a two-dimensional view of the axial positioner from a second perspective.

[0017] Figure 3 This is a cross-sectional view of the axial positioner.

[0018] Figure 4 yes Figure 3 A cross-sectional view along the AA direction.

[0019] Figure 5 yes Figure 4 A cross-sectional view along the BB direction.

[0020] Figure 6 This is a cross-sectional view of the axial positioner when it is installed in the spindle and chuck.

[0021] In the diagram, 1. Positioning plate; 1a. Connecting hole; 1a1. Small diameter section; 1a2. Large diameter section; 1b. Through hole; 1b1. Narrowing ring; 1c. Positioning hole; 2. Connecting post; 2a. First end; 2b. Second end; 2c. Shoulder; 2d. First chamfer; 3. Steel ball; 4. Positioning screw; 5. Spindle; 6. Chuck. Detailed Implementation

[0022] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0023] like Figure 1 and Figure 2 As shown, an axial positioner includes a disc-shaped positioning disk 1, a connecting post 2, and a positioning screw 4. A connecting hole 1a is provided at the center of the positioning disk 1, the connecting post 2 passes through the connecting hole 1a, and the positioning screw 4 is threadedly connected to the connecting post 2 along the axial direction.

[0024] like Figure 3 and Figure 4 As shown, the connecting hole 1a is a stepped hole. The middle part of the connecting post 2 is conical, with its outer diameter increasing from the first end 2a to the second end 2b. The first end 2a of the connecting post 2 is threadedly connected to the wall of the small-diameter section 1a1 of the connecting hole 1a. The second end 2b of the connecting post 2 is hexagonal and extends out of the connecting hole 1a. The wall of the large-diameter section 1a2 of the connecting hole 1a has several through holes 1b that penetrate the outer circumference of the positioning disk 1 radially. These through holes 1b are evenly arranged along the circumference of the positioning disk 1. In this embodiment, three through holes 1b are provided, but two, four, or more through holes 1b can also be provided. Several steel balls 3 are installed in each through hole 1b, arranged radially and abutting against each other along the positioning disk 1. In this embodiment, three steel balls 3 are provided in each through hole 1b, but two, four, or more steel balls 3 can also be provided. The innermost steel ball 3 rests against the outer conical surface of the middle part of the connecting column 2, while the outermost steel ball 3 extends out of the through hole 1b. A constriction ring 1b1 is located at the outer end of the through hole 1b, with an inner diameter smaller than the outer diameter of the steel ball 3 to prevent it from falling out. A shoulder 2c is located on the outer circumferential surface of the connecting column 2 between the first end 2a and the outer conical surface of the middle part of the connecting column 2. A first chamfer 2d is provided between the end face of the first end 2a and the outer circumferential surface of the connecting column 2. The outer circumferential surface of the positioning plate 1 is stepped, and the small diameter section of the outer circumferential surface of the positioning plate 1 corresponds to the position of the small diameter section 1a1 of the connecting hole 1a.

[0025] like Figure 1 and Figure 5 As shown, two positioning holes 1c are provided on the end face of one end of the positioning disk 1, which are symmetrically arranged with respect to the connecting hole 1a. The opening of the positioning hole 1c is aligned with the extension direction of the second end 2b of the connecting post 2. The positioning hole 1c and the through hole 1b are staggered in the circumferential position of the positioning disk 1.

[0026] like Figure 6As shown, the positioning plate 1 is placed into the hollow spindle 5 or the hollow chuck 6, with the second end 2b of the connecting column 2 facing outwards. Then, the connecting column 2 is rotated to move inwards. Since the middle part of the connecting column 2 is conical in shape, with its outer diameter increasing from the first end 2a to the second end 2b, the outer conical surface of the middle part of the connecting column 2 abuts against the inner side of the innermost steel ball 3 and pushes the steel ball 3 to move radially outwards along the positioning plate 1. Meanwhile, the outer side of the outermost steel ball 3 extends out of the through hole 1b and abuts against the inner wall of the spindle 5 or the inner wall of the chuck 6. After tightening the connecting column 2, the positioning plate 1 is locked onto the spindle 5 or the chuck 6 by the steel balls 3. Then, the positioning screw 4 is threaded onto the connecting column 2. After rotating to the desired position, rotation stops. When machining the workpiece, shaft-like parts abut against the outer end face of the positioning screw 4 for axial positioning. When installing the positioning plate 1, it is only necessary to rotate and tighten the connecting column 2 once. Compared with the existing technology that requires rotating and tightening the bolts three times, this axial positioner makes it easier to install the positioner on the spindle 5 or chuck 6.

[0027] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. An axial positioner, comprising a disc-shaped positioning disk (1) and a positioning screw (4), wherein a connecting hole (1a) is provided at the center of the positioning disk (1), characterized in that, The connecting hole (1a) is a stepped hole, and a connecting post (2) is inserted through the connecting hole (1a). The middle part of the connecting post (2) is conical in shape, with its outer diameter increasing from the first end (2a) to the second end (2b) of the connecting post (2). The first end (2a) of the connecting post (2) is threadedly connected to the hole wall of the small diameter section (1a1) of the connecting hole (1a). The hole wall of the large diameter section (1a2) of the connecting hole (1a) has a radially penetrating positioning plate (1). The perforation (1b) on the outer peripheral surface of the positioning disk (1) has several perforations (1b) and is evenly arranged along the circumference of the positioning disk (1). Each perforation (1b) is equipped with several steel balls (3) arranged in sequence along the radial direction of the positioning disk (1) and abutting against each other. The inner part of the innermost steel ball (3) abuts against the outer conical surface of the middle part of the connecting column (2), and the outer part of the outermost steel ball (3) can extend out of the perforation (1b). The positioning screw (4) is threadedly connected to the connecting column (2) along the axial direction.

2. The axial positioner according to claim 1, characterized in that, Two positioning holes (1c) are symmetrically arranged about the connecting hole (1a) on one end face of the positioning disk (1). The second end (2b) of the connecting post (2) extends out of the connecting hole (1a). The orifice of the positioning hole (1c) is aligned with the extension direction of the second end (2b) of the connecting post (2). The positioning hole (1c) and the through hole (1b) are staggered in the circumferential position of the positioning disk (1).

3. The axial positioner according to claim 1, characterized in that, The second end (2b) of the connecting column (2) is hexagonal prism.

4. The axial positioner according to any one of claims 1-3, characterized in that, Each perforation (1b) has a constriction ring (1b1) at its outer port, the inner diameter of which is smaller than the outer diameter of the steel ball (3).

5. The axial positioner according to any one of claims 1-3, characterized in that, The outer peripheral surface of the connecting column (2) has a shoulder (2c), which is located between the first end (2a) of the connecting column (2) and the outer conical surface of the middle part of the connecting column (2).

6. The axial positioner according to any one of claims 1-3, characterized in that, A first chamfer (2d) is provided between the end face of the first end (2a) of the connecting post (2) and the outer peripheral surface of the connecting post (2).

7. The axial positioner according to any one of claims 1-3, characterized in that, The outer peripheral surface of the positioning disk (1) is stepped, and the small diameter section of the outer peripheral surface of the positioning disk (1) is positioned corresponding to the small diameter section (1a1) of the connecting hole (1a).

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