A cylindrical push-out tool withdrawal structure of an inner click type tool sleeve

Abstract

The utility model discloses a kind of columnar push-out tool withdrawal structures of inner clamping type tool sleeve, it mainly includes outer sleeve, inner sleeve, push-out slide bar, pre-press spring and multiple positioning beads;Wherein push-out slide bar includes stud head, column tail and stem section, stud head is placed in outer cylinder cavity, column tail is placed in inner cylinder cavity, pre-press spring is pushed out between column tail and ring wall, push-out slide bar is elastically supported towards the direction of the end port of through-hole and constitutes positioning mode;Stud head includes first end and second end, second end has the recess groove of axial inner concave form in the center;And first end and second end junction form multiple concave cavities, each concave cavity corresponds the inside position of each positioning bead respectively, and axial groove is formed between each concave cavity and first end, the axial both ends of each concave cavity form bead guide surface and retreat bead guide surface respectively;To reach the action of quick tool withdrawal.

Description

Technical Field

[0001] This utility model relates to a tool sleeve, and more particularly to an innovative form of a cylindrical ejection and retraction structure for an internal locking type tool sleeve. Background Technology

[0002] A tool sleeve is a tool clamping device with an internal clamping or locking mechanism. Its main function is to securely and accurately clamp cutting tools (such as milling cutters, drills, etc.) in the clamping structure of an automatic tool magazine to ensure stability and accuracy during the machining process.

[0003] In terms of tool sleeve structure design, in order to achieve the function of quickly releasing the tool, a top support braking mechanism is usually provided. It mainly uses the pushing action of a top support rod to cause the corresponding multiple positioning balls to retract into the release state, thereby releasing the tool.

[0004] Currently known top-support braking mechanisms typically use a simple outer diameter expansion section to guide the positioning beads to change radial position. However, as those skilled in the art know, machining tools come in a wide variety of sizes, and the shape of the guide beads on the top-support rod is limited by its minimum outer diameter. This is because it involves the minimum size of the threaded part and other factors, making it impossible to implement tool sleeves below a certain size specification. This, in turn, hinders the industry's progress in developing smaller, specialized machining tools. Summary of the Invention

[0005] The main objective of this utility model is to provide a cylindrical ejection and retraction structure for an internally locking type tool sleeve. The technical problem it aims to solve is to innovate and break through the goal of developing a new type of tool sleeve ejection and retraction structure that is more ideal and practical.

[0006] Based on the aforementioned objectives, the present invention achieves its purpose as follows: A cylindrical ejection and retraction structure for an internally locking type tool sleeve includes an outer sleeve, an inner sleeve, a support slide rod, a preload spring, and a plurality of positioning beads; wherein the outer sleeve defines the axial and radial directions, forming a through hole in the axial direction, the through hole including an inner port and an outer port, the outer port being enlarged to form a tool holder slot; the inner sleeve is fixed in the through hole, the inner sleeve being divided into an outer cylinder cavity and an inner cylinder cavity by an annular wall, the outer cylinder cavity having a plurality of bead holes arranged radially at intervals to connect to the tool holder slot, so that the plurality of positioning beads are arranged at each bead hole and have both outward convex and inward retracted states; the ejection slide rod includes a column head, a column tail, and a rod body section between the column head and the column tail, the column... The head is placed in the outer cylinder cavity, and the tail is placed in the inner cylinder cavity. The preloaded spring supports the tail between the tail and the ring wall, and the push-out slide rod is elastically supported towards the inner port of the through hole to form a positioning mode. Conversely, when the push-out slide rod is pushed towards the outer port of the through hole by force, it forms a release mode. The head includes a first end and a second end. The center of the second end has an axially concave relief groove. A plurality of recesses are formed at the junction of the first end and the second end. Each recess corresponds to the inner side of each positioning bead to provide a space for each positioning bead to retract inward. An axial groove is formed between each recess and the first end. The two ends of each recess form an infeed guide surface and an outfeed guide surface, respectively. An axially extending spacer rib is formed between each axial groove.

[0007] The outstanding and beneficial technical effects of this utility model compared with the prior art are: it can further reduce the volume of the columnar ejection and retraction structure of the internal locking type tool sleeve, and the first and second ends of the ejection slide bar column can achieve a straight columnar shape. In this way, the process of developing smaller special machining tools in related industries can be realized earlier, which has practical progress and better industrial utilization benefits. Attached Figure Description

[0008] Figure 1 This is an exploded perspective view of a preferred embodiment of the present invention.

[0009] Figure 2 This is an anatomical view of a preferred embodiment of the present invention.

[0010] Figure 3 This is a three-dimensional enlarged view of the sliding rod head, which is a preferred embodiment of the present invention.

[0011] Figure 4 This is a perspective view of a preferred embodiment of the present invention.

[0012] Figure 5 Combined cross-section of a preferred embodiment of the present utility model Figure 1 This is to introduce the slider positioning mode.

[0013] Figure 6Combined cross-section of a preferred embodiment of the present utility model Figure 2 This is to enable the slider release mode.

[0014] Figure 7 The axial groove of the preferred embodiment of this utility model is a concave arc surface.

[0015] Figure 8 The axial groove of the preferred embodiment of this utility model has a chamfered shape on both sides. Detailed Implementation

[0016] Please see Figures 1 to 5 The diagram shows a preferred embodiment of the cylindrical ejection and retraction structure of the internal locking type tool sleeve of this utility model. However, these embodiments are for illustrative purposes only and are not limited to this structure in patent applications.

[0017] The cylindrical ejection and retraction structure of the internal locking type tool sleeve includes an outer sleeve 10, an inner sleeve 20, an ejection slide rod 30, a preload spring 40, and a plurality of positioning beads 50; wherein the outer sleeve 10 defines an axial direction X and a radial direction Y, the axial direction X forming a through hole 11, the through hole 11 including an inner port 12 and an outer port 13, the outer port 13 being enlarged to form a tool holder slot 14; the inner sleeve 20 is fixed in the through hole 11, the inner sleeve... 20 is divided into an outer cylindrical cavity 22 and an inner cylindrical cavity 23 by a ring wall 21. The outer cylindrical cavity 22 is provided with a plurality of bead holes 24 in a radially spaced ring, which are connected to the tool holder slot 14 so that the plurality of positioning beads 50 are arranged at each bead hole 24 and have both convex and concave states. The push-out slide bar 30 includes a column head 31, a column tail 32 and a bar body section 33 between the column head 31 and the column tail 32. The column head 31 is located in the outer cylindrical cavity 22 and the column tail 32 is located in the inner cylindrical cavity 23. The preloaded spring 40 is supported between the column tail 32 and the ring wall 21, and the push-out slide rod 30 is elastically supported towards the inner port 12 of the through hole 11 to form a positioning mode. Conversely, when the push-out slide rod 30 is pushed towards the outer port 13 of the through hole 11 under force, it forms a release mode. The column head 31 includes a first end 311 and a second end 312. The center of the second end 312 has an axially concave relief groove 313. The first end 311... A plurality of recesses 314 are formed at the junction with the second end 312. Each recess 314 corresponds to the inner side of each positioning bead 50 to provide accommodating space when each positioning bead 50 retracts inward. An axial groove 315 is formed between each recess 314 and the first end 311. An inlet guide surface 316 and an outlet guide surface 317 are formed at the two ends of the axial groove 314, respectively. An axially extending spacer rib 318 is formed between each axial groove 315.

[0018] In the structure described above, the clearance groove 313 is mainly for avoiding the cutting fluid connector component of the tool holder 60 inserted in the tool holder slot 14, hence the name "clearance" groove. In addition, the axial groove 315 formed between the recess 314 and the first end 311 is mainly for facilitating the insertion of the pin 31 of the slide bar 30 into the outer cylinder cavity 22. Before the pin 31 is inserted into the outer cylinder cavity 22, the positioning beads 50 must be arranged in the bead holes 24 in an outward convex state. However, if the axial groove 315 is not formed, the pin 31 will be blocked by the inner side of each positioning bead 50 and cannot be inserted into the outer cylinder cavity 22. Therefore, the axial groove 315 is mainly for avoiding the inner side of the positioning beads 50. After the pin 31 is inserted into the outer cylinder cavity 22, it will eventually be positioned by the bead guide surface 316 of the recess 314 abutting against the positioning bead 50.

[0019] like Figure 2 As shown, in this example, the outer diameters of the first end 311 and the second end 312 of the push rod 30 column head 31 are close to (or equal to) each other.

[0020] like Figure 2 As shown, in this example, the inner sides of the plurality of recesses 314 are shaped to penetrate and connect to the clearance groove 313.

[0021] like Figure 5 As shown, in this example, the radial depth H1 of the axial groove 315 is matched with the inner radial depth of its corresponding positioning bead 50 when it is in an outward convex state.

[0022] like Figure 1 , 2 As shown, in this example, the head 31 of the push-out slide rod 30 and the rod body section 33 are connected by a threaded part 34 (i.e., the stud and the threaded hole).

[0023] Based on the above-described structural composition and technical features, the cylindrical ejection and retraction structure of the internal locking type tool sleeve disclosed in this utility model has practical applications such as... Figure 5 As shown, this is a device used to hold a tool holder 60. It primarily utilizes a pre-compressed spring 40 supported between the post end 32 and the annular wall 21. This spring elastically pushes the push-out slide rod 30 towards the inner port 12 of the through hole 11, creating a positioning mode. At this time, the ball guide surface 316 at the lower axial end of the recess 314 pushes each positioning ball 50 outwards from the ball hole 24, thus locking it in the pre-set slot 61 of the tool holder 60. Conversely, to release the tool holder 60... Figure 6As shown, the tail 32 of the push-out slide bar 30 will be pushed towards the outer port 13 of the through hole 11 by a force L1 (Note: usually from the pressing mechanism of the automatic tool magazine), thus forming a release mode. At this time, the ball guide surface 316 at the lower end of the recess 314 will move downward, so that each positioning ball 50 turns into the state of being retracted in the ball hole 24. Therefore, the tool holder 60 is not positioned and can be dislodged from the tool holder slot 14 (as shown by arrow L2).

[0024] Through the morphological features such as the recess 314 and the axial groove 315, the first end 311 and the second end 312 of the push rod 30 column head 31 can reliably achieve a straight column shape. The axially extending spacer ribs 318 formed between each axial groove 315 can greatly improve the structural strength of the column head 31, and it is not a problem to cope with smaller tool sizes, thereby enabling the industry to develop smaller special machining tools earlier.

[0025] like Figure 7 As shown, in this example, the axial groove 315b is an implementation of a concave arc surface. For example... Figure 8 As shown, in this example, the axial groove 315c is an embodiment with chamfered portions 35 on both sides. The advantage of this embodiment is that it can further increase the structural strength of the column head 31 and avoid the problem of excessive material removal caused by the formation of the axial groove 315c.

Claims

1. A cylindrical ejection and retraction structure for an internally clamping type tool sleeve, characterized in that... The system includes an outer sleeve, an inner sleeve, an ejector slide rod, a preload spring, and a plurality of positioning beads. The outer sleeve defines an axial and radial direction, forming a through hole along the axial direction. The through hole includes an inner port and an outer port, with the outer port being enlarged to form a tool holder slot. The inner sleeve is fixed in the through hole and is divided into an outer cylinder cavity and an inner cylinder cavity by an annular wall. The outer cylinder cavity has a plurality of radially spaced bead holes that connect to the tool holder slot, allowing the plurality of positioning beads to be positioned at each bead hole and to have both convex and concave states. The ejector slide rod includes a head, a tail, and a rod body section between the head and the tail. The head is located in the outer cylinder cavity, and the tail is located in the inner cylinder cavity, supported by the preload spring. Between the column tail and the ring wall, the push-out slide rod is elastically pushed towards the inner port of the through hole to form a positioning mode. Conversely, when the push-out slide rod is pushed towards the outer port of the through hole by force, it forms a release mode. The column head includes a first end and a second end. The center of the second end has a relief groove with an axially concave shape. A plurality of recesses are formed at the junction of the first end and the second end. Each recess corresponds to the inner side of each positioning bead to provide a space for the positioning bead to retract inward. An axial groove is formed between each recess and the first end. An inlet guide surface and an outlet guide surface are formed at the two ends of the axial groove. An axially extending spacer rib is formed between each axial groove.

2. The cylindrical ejection and retraction structure of the internal locking type tool sleeve according to claim 1, characterized in that... The inner sides of multiple recesses are shaped to penetrate and connect to the clearance groove.

3. The cylindrical ejection and retraction structure of the internal locking type tool sleeve according to claim 1, characterized in that... The radial depth of the axial groove is matched with the inner radial depth of the corresponding positioning bead when it is in an outward convex state.

4. The cylindrical ejection and retraction structure of the internal locking type tool sleeve according to claim 1, characterized in that... The connection between the push rod head and the rod body section is achieved through a screw connection.

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