Miniature ejector pin

Abstract

The utility model relates to a miniature ejector pin in the technical field of ejector pins, which comprises a clamping mechanism and a handle body, the clamping mechanism is mounted at one end of the handle body, one end of the handle body close to the clamping mechanism extends inwards to form a first mounting groove, the clamping mechanism is sequentially composed of a chuck, a bearing, a sliding piece and a spring from left to right, and the bearing is mounted in the first mounting groove. The surface of the handle body is provided with an adjusting opening communicated with the first installation groove, the handle body capable of being installed on a cutter head is arranged, the use space is saved, use is convenient, when the ejector pin makes contact with a workpiece, the chuck can rotate in the direction of the workpiece through the arranged bearing and the movable sliding piece, and therefore the workpiece can be clamped conveniently. And the spring is arranged on the sliding piece, so that when the surface of the workpiece is uneven in the rotating process of the chuck, the chuck retracts through the spring, the phenomenon that the surface of the workpiece is damaged due to forced rotation of the ejector pin and the workpiece can be avoided, and therefore the application range is large.

Description

Technical Field

[0001] The utility model relates to the field of thimbles, in particular to a micro thimble. Background Art

[0002] When machining a workpiece, the workpiece is often clamped by a jaw and rotated at a high speed, and a thimble is used to abut against the workpiece to maintain the stability of the workpiece during machining.

[0003] Chinese Patent No. CN218555601U discloses a thimble assembly. The thimble assembly includes a housing, a thimble fixing member and a retaining ring. The housing is hollow and includes a receiving section, and the receiving section includes an opening; the thimble fixing member is rod-shaped and includes a thimble consolidation head, and the thimble consolidation head is provided with a thimble receiving hole. The thimble fixing member is rotatably disposed inside the housing, and the thimble consolidation head passes through the opening of the receiving section; the retaining ring is sleeved on the thimble consolidation head and is tightly fitted with the thimble consolidation head so as to be able to rotate together with the thimble fixing member, and the retaining ring blocks the opening. The retaining ring of the utility model is tightly fitted with the thimble consolidation head, so the retaining ring and the thimble fixing member can rotate at a high speed together without mutual wear, which can solve the problems derived from the wear of the structure of the existing thimble assembly due to high-speed rotation, and provide a thimble assembly that can extend the service life, avoid friction heating and reduce the chance of cutting fluid or cutting chips entering the thimble fixing member. However, the thimble still has the following problems: the thimble is relatively large and is only suitable for machining parts with fewer processes. During the machining process with more complex processes, the thimble requires a support seat to support its position, which will occupy a large amount of space, greatly affecting the movement range of other tools and causing secondary machining. Moreover, when the thimble contacts the workpiece, due to the uneven surface of the workpiece, during the forced rotation of the workpiece, it will cause extrusion between the thimble and the workpiece, resulting in damage to the surface of the workpiece. Therefore, the applicable range is limited. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the above defects and provide a micro thimble.

[0005] The purpose of the utility model is achieved in the following way: a micro thimble includes a clamping mechanism and a shank. The clamping mechanism is installed at one end of the shank. A first installation groove extends inward from one end of the shank close to the clamping mechanism. It is characterized in that the clamping mechanism is successively composed of a chuck, a bearing, a sliding member and a spring from left to right. The chuck is buckled on the bearing, the bearing is installed on the sliding member, the spring is installed in the first installation groove, the sliding member is buckled on the first installation groove, and one end of the sliding member contacts the spring. An adjustment port communicating with the first installation groove is provided on the surface of the shank.

[0006] Further, one end of the chuck away from the bearing extends inwardly with a clamping groove for installing the center pin. The center pin is slidably installed on the clamping groove and is in clearance fit with the clamping groove.

[0007] Further, the surface of the chuck is provided with a threaded hole communicating with the clamping groove, and a tightening bolt is installed on the threaded hole.

[0008] Further, a through hole is provided in the middle of the bearing, and the through hole can be cooperated with the chuck through setting.

[0009] Further, one end of the chuck close to the bearing extends outwardly with a fastening portion cooperating with the through hole. The chuck can be fastened on the bearing through the fastening portion, and the chuck can be driven to rotate by the bearing.

[0010] Further, one end of the sliding member close to the bearing extends inwardly with a second installation groove.

[0011] Further, an adjustment hole corresponding to the adjustment port is provided on the sliding member, and a pin is installed on the adjustment hole. The sliding member can be controlled to slide back and forth within the range of the adjustment port through the pin.

[0012] The beneficial effects produced by the present utility model are as follows:

[0013] By providing a shank that can be installed on the tool holder, not only the use space is saved, but also it is convenient to use. Through the provided bearing and the movable sliding member, when the center pin contacts the workpiece, the chuck can rotate along the direction of the workpiece. And by setting a spring on the sliding member, when the surface of the workpiece is uneven during the rotation of the chuck, the chuck can avoid the phenomenon that the center pin and the workpiece are forced to rotate and damage the surface of the workpiece through the spring retraction. Therefore, the applicable range is relatively large. Description of the Drawings

[0014] Figure 1 is a three-dimensional structure schematic diagram of a micro center pin of the present utility model;

[0015] Figure 2 is a three-dimensional structure schematic diagram of a micro center pin of the present utility model;

[0016] Figure 3 is of the present utility model Figure 2 a partial enlarged schematic diagram of A therein;

[0017] Figure 4 is a plan view of a micro center pin of the present utility model;

[0018] Figure 5 is of the present utility model Figure 4 a cross-sectional view taken along B-B therein;

[0019] Figure 6 is of the present utility modelFigure 5 Partial enlarged schematic diagram of C;

[0020] Figure 7 This utility model Figure 5 Partial enlarged schematic diagram of D;

[0021] Figure 8 Plan view of a micro ejector pin of this utility model;

[0022] In the figure, 1. shank body; 2. first installation groove; 3. chuck; 4. bearing; 5. sliding member; 6. spring; 7. clamping groove; 8. threaded hole; 9. tightening bolt; 10. through hole; 11. fastening portion; 12. second installation groove; 13. adjustment hole; 14. pin; 15. adjustment opening; 16. ejector pin. Specific embodiments

[0023] For the convenience of understanding by those skilled in the art, the following further describes this utility model in conjunction with embodiments and the accompanying drawings. The content mentioned in the embodiments does not limit this utility model. The following describes this utility model in detail with reference to the accompanying drawings.

[0024] Please refer to Figures 1-8 , a micro ejector pin in its specific implementation, includes a clamping mechanism and a shank body 1. The clamping mechanism is installed at one end of the shank body 1. The shank body 1 extends inward at one end close to the clamping mechanism to form a first installation groove 2. The clamping mechanism is successively composed of a chuck 3, a bearing 4, a sliding member 5 and a spring 6 from left to right. The chuck 3 is fastened on the bearing 4. The bearing 4 is installed on the sliding member 5. The spring 6 is installed in the first installation groove 2. The sliding member 5 is fastened on the first installation groove 2, and one end of the sliding member 5 contacts the spring 6. An adjustment opening 15 communicating with the first installation groove 2 is provided on the surface of the shank body 1.

[0025] One end of the chuck 3 away from the bearing 4 extends inward to form a clamping groove 7 for installing the ejector pin 16. The ejector pin 16 is slidably installed on the clamping groove 7 and is in clearance fit with the clamping groove 7. A threaded hole 8 communicating with the clamping groove 7 is provided on the surface of the chuck 3, and a tightening bolt 9 is installed on the threaded hole 8.

[0026] A through hole 10 is provided in the middle of the bearing 4. By providing the through hole 10, it can cooperate with the chuck 3. One end of the chuck 3 close to the bearing 4 extends outward to form a fastening portion 11 matching the through hole 10. The chuck 3 can be fastened on the bearing 4 through the fastening portion 11, and the chuck 3 can be driven to rotate by the bearing 4.

[0027] One end of the sliding member 5 close to the bearing 4 extends inwards to form a second installation groove 12. The sliding member 5 is provided with an adjustment hole 13 corresponding to the adjustment port 15. A pin 14 is installed on the adjustment hole 13. The sliding member 5 can be controlled to slide back and forth within the range of the adjustment port 15 through the pin 14.

[0028] The working principle of the embodiment of the present invention is as follows: During work, the shank 1 is clamped by the cutter head or the cutter sleeve, and the ejector pin 16 is clamped on the chuck 3. The ejector pin 16 is locked by tightening the bolt 9. The ejector pin 16 contacts the center point of the workpiece surface. During the rotation of the workpiece, the chuck 3 rotates with the rotation of the workpiece through the bearing 4, and the chuck 3 will be adjusted with the undulation of the workpiece surface. The sliding member 5 will retract or slide out in the first installation groove 2 through the spring 6, thereby driving the chuck 3 to move back and forth. And by installing the pin 14 between the adjustment port 15 and the adjustment hole 13 on the sliding member 5, the sliding member 5 can only slide within the range of the adjustment port 15.

[0029] The above content is a further detailed description of the present invention in combination with specific further embodiments. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions or replacements can still be made, which should all be regarded as the protection scope of the present invention.

Claims

1. A micro thimble, comprising a clamping mechanism and a shank body, the clamping mechanism being installed at one end of the shank body, and a first installation groove extending inwards from one end of the shank body close to the clamping mechanism, characterized in that, The clamping mechanism is successively composed of a chuck, a bearing, a sliding member and a spring from left to right. The chuck is buckled on the bearing, the bearing is installed on the sliding member, the spring is installed in the first installation groove, the sliding member is buckled on the first installation groove, and one end of the sliding member contacts the spring. An adjustment port communicating with the first installation groove is provided on the surface of the handle body.

2. The micro thimble according to claim 1, wherein: One end of the chuck away from the bearing extends inwardly with a clamping groove for installing the thimble.

3. The micro thimble according to claim 2, characterized in that: A threaded hole communicating with the clamping groove is provided on the surface of the chuck, and a tightening bolt is installed on the threaded hole.

4. The micro thimble according to claim 1, characterized in that: A through hole is provided in the middle of the bearing.

5. The micro thimble according to claim 4, wherein: One end of the chuck close to the bearing extends outwardly with a buckling portion matching the through hole.

6. A micro thimble according to any one of claims 1-5, characterized in that: One end of the sliding member close to the bearing extends inwardly with a second installation groove.

7. A micro thimble according to any one of claims 1-5, characterized in that: An adjustment hole corresponding to the adjustment port is provided on the sliding member, and a pin is installed on the adjustment hole.

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