A knife handle taper shank conversion sleeve

Abstract

This utility model discloses a tool holder taper shank conversion sleeve, relating to the field of machine tool technology. The tool holder taper shank conversion sleeve includes: a conversion sleeve body, which comprises a cylindrical portion and a tapered portion from top to bottom. The conversion sleeve body has a first receiving groove and a second receiving groove sequentially formed inside the cylindrical portion. The first receiving groove is located inside the cylindrical portion and is used to place the bottom of the HSK tool holder; a pull claw assembly, which includes a pull rod and a plurality of pull claws spaced circumferentially on the outer wall of the pull rod. One end of the pull rod and the plurality of pull claws is located inside the second receiving groove, and the other end of the pull rod and the plurality of pull claws extends into the first receiving groove for connecting to the connecting groove. This utility model has a compact structure and, while adapting to the taper hole of a BT taper shank spindle, can achieve tightening or loosening of the assembled HSK tool holder.

Description

Technical Field

[0001] This utility model relates to the field of machine tool technology, and in particular to a tool holder taper shank conversion sleeve. Background Technology

[0002] Tool presetting devices typically only come with one type of spindle. When a tool presetting device equipped with a BT taper shank spindle needs to measure HSK tool holders, a high-precision adapter sleeve is required to work with the spindle to achieve the conversion. The catcher structure for HSK tool holders is usually quite complex and requires a large space. Furthermore, the adapter sleeve designed for BT taper shank spindle taper holes cannot simultaneously accommodate both the catcher structure and the HSK tool holder while achieving the tightening or loosening action. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a tool holder taper shank conversion sleeve with a compact structure. While adapting to the taper hole of the BT taper shank spindle, it can also tighten or loosen the assembled HSK tool holder.

[0004] This utility model is achieved through the following technical solution:

[0005] This utility model provides a tool holder taper shank conversion sleeve, wherein the bottom of the HSK tool holder has a connecting groove, and the HSK tool holder conversion sleeve includes:

[0006] The conversion sleeve body includes a cylindrical part and a conical part from top to bottom. The conversion sleeve body has a first receiving groove and a second receiving groove that pass through it in sequence from top to bottom. The first receiving groove is located inside the cylindrical part and is used to place the bottom of the HSK tool holder.

[0007] A pull claw assembly includes a pull rod and a plurality of pull claws spaced circumferentially on the outer side wall of the pull rod. One end of the pull rod and the plurality of pull claws is disposed inside the second receiving groove, and the other end of the pull rod and the plurality of pull claws extends into the first receiving groove for connecting the connecting groove.

[0008] The pull rod has an annular groove on the side wall of one end located in the first receiving groove. By driving the pull rod to pull down or push up, the ends of the multiple pull claws located in the first receiving groove are moved out or into the groove to press or release the HSK tool holder.

[0009] Furthermore, the second receiving groove includes, from top to bottom, a first stepped groove and a second stepped groove.

[0010] The diameter of the first stepped groove is smaller than the diameter of the second stepped groove and the diameter of the first receiving groove;

[0011] The pull rods are arranged sequentially from top to bottom inside the first receiving groove, the first stepped groove, and the second stepped groove;

[0012] One end of each of the plurality of pull claws is engaged with the inner wall of the second stepped groove, and the other end extends through the first stepped groove into the interior of the first receiving groove.

[0013] Furthermore, a first inclined portion is formed on the inner side of the other end of each of the plurality of pull claws.

[0014] The pull rod has a second inclined portion in the shape of an annulus, which is located on the side of the groove near the top opening of the first receiving groove.

[0015] Furthermore, the cross-section of the groove is trapezoidal, and the opening size of the groove gradually decreases radially.

[0016] Furthermore, the second inclined portion connects to the groove.

[0017] Furthermore, a third inclined portion in the shape of an annular shape is also formed on the pull rod, and the third inclined portion is located on the other side of the groove relative to the second inclined portion.

[0018] Furthermore, one end of the third inclined portion is located inside the first receiving groove and connected to the recess, while the other end is located inside the first stepped groove.

[0019] Furthermore, notches are formed on the inner surfaces of the plurality of pull claws corresponding to the grooves and the third inclined portion.

[0020] Furthermore, the connecting groove includes a third-step groove and a fourth-step groove, which are larger at the top and smaller at the bottom.

[0021] The other end of each of the plurality of pull claws passes through the fourth step groove to extend into the interior of the third step groove.

[0022] The outer side of the other end of the plurality of pull claws can be movably engaged with or disengaged from the first step surface inside the third step groove.

[0023] Furthermore, the second receiving groove also includes a fifth stepped groove, which is located inside the conical portion.

[0024] The fifth step groove is located below and connected to the second step groove, and a second step surface is formed inside the fifth step groove;

[0025] The pull claw assembly also includes a pull rivet connecting rod and a spring. The pull rivet connecting rod is located inside the fifth step groove, and the spring is located on the second step surface inside the fifth step groove and is sleeved on the outside of the pull rivet connecting rod. One end of the pull rivet connecting rod is connected to the pull rod and pressed against the top of the spring, and the other end passes through the spring and extends out of the cone portion.

[0026] Compared with existing technologies, the advantages of this utility model are:

[0027] This utility model's tool holder taper shank conversion sleeve features an external contour design of a cylindrical portion and a tapered portion from top to bottom, adapted to the BT taper shank spindle. Furthermore, a first receiving groove is provided inside the cylindrical portion for mounting HSK tool holders. This fully utilizes the relatively large internal space at the top of the conversion sleeve body to mount HSK tool holders, achieving the effect that both the BT taper shank spindle and the HSK tool holder are compatible.

[0028] This utility model's tool holder taper shank conversion sleeve uses the corner point where the inner wall of the first stepped groove in the second receiving groove connects to the inner wall of the second stepped groove as the rotation point. Driving the pull rod downwards causes the portion of the pull rod located in the first receiving groove to abut against the corresponding ends of multiple pull claws, thus locking the portions of the pull claws within the first receiving groove into the connecting groove, thereby tightening the HSK tool holder within the first receiving groove. Driving the pull rod upwards causes the grooved portion of the pull rod to move to the height of the corresponding ends of the pull claws within the first receiving groove. The corresponding ends of the pull claws rotate out of the connecting groove and slide into the groove, thereby releasing the HSK tool holder from the conversion sleeve body. This relatively simple structure achieves both adaptation to the taper hole of the BT taper shank spindle and the ability to tighten or loosen the assembled HSK tool holder, while also ensuring the assembly accuracy of the converted HSK tool holder. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the tool holder taper sleeve in the tightened tool holder state according to an embodiment of the present invention;

[0030] Figure 2 for Figure 1 Enlarged schematic diagram of region a in the diagram;

[0031] Figure 3 This is a schematic diagram of the tool holder taper sleeve in the loosened tool holder state according to an embodiment of the present utility model;

[0032] Figure 4 for Figure 3 Enlarged schematic diagram of region b in the diagram;

[0033] Figure 5 This is a schematic diagram of the structure of the conversion sleeve body in the tool holder taper conversion sleeve of this utility model embodiment.

[0034] Figure label:

[0035] 100. Converter sleeve body; 110. Cylindrical part; 120. Conical part; 130. First receiving groove; 140. Second receiving groove; 141. First stepped groove; 142. Second stepped groove; 143. Fifth stepped groove; 1431. Second stepped surface; 200. Pull claw assembly; 210. Pull rod; 211. Groove; 212. Second inclined part; 213. Third inclined part; 220. Pull claw; 221. First inclined part; 222. Notch; 230. Pull rivet connecting rod; 240. Spring; 300. HSK tool holder; 310. Connecting groove; 311. Third stepped groove; 312. Fourth stepped groove. Detailed Implementation

[0036] The following detailed, non-limiting description of the utility model's technical solution, in conjunction with preferred embodiments and accompanying drawings, is provided. In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0037] like Figures 1 to 5As shown, this utility model provides a tool holder conversion sleeve with a tapered shank, wherein the bottom of the applicable HSK tool holder 300 is provided with a connecting groove 310. The tool holder conversion sleeve may include a conversion sleeve body 100 and a pull claw assembly 200. The conversion sleeve body 100 includes a cylindrical portion 110 and a tapered portion 120 from top to bottom, thereby adapting its outer contour to a BT tapered shank spindle and allowing the HSK tool holder to be installed inside. The conversion sleeve body 110 has a first receiving groove 130 and a second receiving groove 140 that pass through it, with the first receiving groove 130 located inside the cylindrical portion 110 and used to place the bottom of the HSK tool holder 300. The pull claw assembly 200 may include a pull rod 210 and a plurality of pull claws 220 spaced circumferentially on the outer side wall of the pull rod 210. One end of the pull rod 210 and the plurality of pull claws 220 is located inside the second receiving groove 140, and the other end of the pull rod 210 and the plurality of pull claws 220 extends into the first receiving groove 130 for connecting to the connecting groove 310. An annular groove 211 is formed on the side wall of the end of the pull rod 210 located in the first receiving groove 130. By driving the pull rod 210 to pull down or push up, the ends of the plurality of pull claws 220 located in the first receiving groove 130 are moved out of or into the groove 211 to press or release the HSK tool holder 300.

[0038] Specifically, the tool holder taper shank conversion sleeve of this utility model has an external contour of the conversion sleeve body 100 designed as a cylindrical portion 110 and a tapered portion 120 from top to bottom, adapted to the BT taper shank spindle. Furthermore, a first receiving groove 130 is provided inside the cylindrical portion 110 for mounting the HSK tool holder 300. Specifically, the bottom of the HSK tool holder 300 is connected to the inside of the first receiving groove 130, thereby fully utilizing the relatively large internal space of the upper diameter of the conversion sleeve body 100 to mount the HSK tool holder, achieving the effect that the BT taper shank spindle can also be adapted to test the HSK tool holder. Below the first receiving groove 130, a second receiving groove 140 is provided, communicating with it. As an example, the second receiving groove 140 includes, from top to bottom, a first stepped groove 141 and a second stepped groove 142. The diameter of the first stepped groove 141 is smaller than the diameter of the second stepped groove 142 and the first receiving groove 130. The pull rod 210 is arranged from top to bottom inside the first receiving groove 130, the first stepped groove 141, and the second stepped groove 142. One end of the pull rod 210 and a plurality of pull claws 220 passes through the first stepped groove 141 and the second stepped groove 142 in sequence, and the corresponding ends of the plurality of pull claws 220 are engaged with the inner sidewall of the second stepped groove. The other ends of the plurality of pull claws 220 extend into the interior of the first receiving groove 130. Using the corner point where the inner wall of the first stepped groove 141 connects to the inner wall of the second stepped groove 142 as the rotation point, the drive rod 210 is pulled down. The portion of the drive rod 210 located in the first receiving groove 130 abuts against the corresponding ends of the multiple claws 220, so that the portions of the multiple claws 220 located in the first receiving groove 130 are locked in the connecting groove 310, thereby pulling the HSK tool holder 300 tight within the first receiving groove 130. When the drive rod 210 is pushed up, the portion of the groove 211 of the drive rod 210 moves to the height of the corresponding ends of the multiple claws 220 located in the first receiving groove 130. The corresponding ends of the multiple claws 220 rotate out of the connecting groove 310 and slide into the groove 211, thereby allowing the HSK tool holder 300 to be released and removed from the conversion sleeve body 100. Preferably, the first stepped groove 141 and the second stepped groove 142 are located in the cylindrical portion 110 so as to make full use of the space of the cylindrical portion 110 to accommodate the claw assembly 200.

[0039] Therefore, the tool holder taper shank conversion sleeve of this utility model can achieve, through a relatively simple structure, both adapting to the taper hole of the BT taper shank spindle and simultaneously allowing the assembled HSK tool holder to be tightened or loosened, while also ensuring the assembly accuracy of the converted HSK tool holder 300.

[0040] In some embodiments, such as Figure 2 and Figure 4As shown, a first inclined portion 221 is formed on the inner side of the other end of the plurality of pull claws 220, that is, the first inclined portion 221 is formed on the end of the pull claw 220 located in the first receiving groove 130. A second inclined portion 212 in the shape of an annular shape is formed on the pull rod 220, and the second inclined portion 212 is located on the side of the groove 211 near the top opening of the first receiving groove 130.

[0041] Therefore, the cooperation between the first inclined portion 221 and the second inclined portion 212 facilitates the smooth entry and exit of the corresponding end of the pull claw 220 into the groove 211, improving the coordination of the mutual action between the pull claw 220 and the pull rod 210. In addition, it also facilitates the pull rod 210 to open and tighten against the pull claw 220, so that the tool holder is in a pressed state, improving the reliability of the clamping of the pull claw 220.

[0042] In some embodiments, such as Figure 2 and Figure 4 As shown, the cross-section of the groove 211 is trapezoidal, and the opening size of the groove 211 gradually decreases radially.

[0043] Specifically, the vertical cross-section of the groove 211 is trapezoidal, and the opening of the groove 211 gradually decreases radially from the outside to the inside, thereby facilitating the smooth entry of the corresponding end of the pull claw 220 into the groove 211.

[0044] In some embodiments, such as Figure 2 and Figure 4 As shown, the second inclined portion 212 is connected to the groove 211.

[0045] In other words, the end of the second inclined portion 212 near the groove 211 connects with the opening edge of the groove 211, achieving a better transition effect.

[0046] In some embodiments, such as Figure 2 and Figure 4 As shown, a ring-shaped third inclined portion 213 is also formed on the pull rod 210, and the third inclined portion 213 is located on the other side of the groove 211 relative to the second inclined portion 212.

[0047] Therefore, by providing the third inclined portion 213, it is easier to provide space for the pull claw 220 to tilt and exit the first receiving groove 130, thereby improving the reliability of the pull claw assembly 200 drive. Preferably, one end of the third inclined portion 213 is located inside the first receiving groove 130 and connected to the groove 211, and the other end is located inside the first stepped groove 141.

[0048] In some embodiments, such as Figure 2 and Figure 4 As shown, notches 222 are formed on the inner surfaces of the multiple pull claws 220 corresponding to the grooves 211 and the third inclined portion 213.

[0049] By using the notch 222 in conjunction with the groove 211 and the third inclined portion 213, the structure becomes more compact, maximizing the space inside the conversion sleeve body 100 required for the movement of the pull claw 220, while reducing its own size.

[0050] In some embodiments, such as Figure 1 and Figure 3 As shown, the connecting groove 310 may include a third stepped groove 311 (larger at the top and smaller at the bottom) and a fourth stepped groove 312. The other ends of the plurality of pull claws 220 pass through the fourth stepped groove 312 to extend into the interior of the third stepped groove 311, and the outer sides of the other ends of the plurality of pull claws 220 can be movably engaged with or disengaged from the first step surface inside the third stepped groove 311.

[0051] This allows the puller 220 to stably clamp the HSK tool holder 300.

[0052] In some embodiments, such as Figure 1 , Figure 3 and Figure 5 As shown, the second receiving groove 140 also includes a fifth stepped groove 143, which is located inside the conical portion 120. The fifth stepped groove 143 is located below and connected to the second stepped groove 142, and a second stepped surface 1431 is formed inside the fifth stepped groove 143. The pull claw assembly 200 may also include a pull pin connecting rod 230 and a spring 240. The pull pin connecting rod 230 is located inside the fifth stepped groove 143, and the spring 240 is located on the second stepped surface 1431 inside the fifth stepped groove 143 and is sleeved on the outside of the pull pin connecting rod 230. One end of the pull pin connecting rod 230 is connected to the pull rod 210 and pressed against the top of the spring 240, and the other end extends out of the conical portion 120 through the spring 240.

[0053] Specifically, the pull rod 230 extends downward from one end of the cone portion 120, while the spring 240 is compressed, thereby pulling the pull rod 210 downward so that the gripper 220 clamps the HSK tool holder 300; when the pull rod 230 is released, the spring 240 returns to its original position, and the pull rod 230 moves upward by the elastic force of the spring 240, thereby pushing the pull rod 210 upward so that the gripper 220 releases the HSK tool holder 300. At the same time, the top of the pull rod 210 abuts against the top of the connecting groove 310, lifting the HSK tool holder 300 so that the tool holder can be dislodged from the first receiving groove 130, making it easy to remove the HSK tool holder 300.

[0054] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A tool holder cone adapter, comprising: The bottom of the HSK tool holder (300) is provided with a connecting groove (310), characterized in that the tool holder taper adapter sleeve includes: The conversion sleeve body (100) includes a cylindrical part (110) and a conical part (120) from top to bottom. The conversion sleeve body (100) has a first receiving groove (130) and a second receiving groove (140) that pass through it in sequence. The first receiving groove (130) is located inside the cylindrical part (110) and is used to place the bottom of the HSK tool holder (300). A pull claw assembly (200) includes a pull rod (210) and a plurality of pull claws (220) spaced circumferentially on the outer side wall of the pull rod (210). One end of the pull rod (210) and the plurality of pull claws (220) is disposed inside the second receiving groove (140), and the other end of the pull rod (210) and the plurality of pull claws (220) extends into the first receiving groove (130) for connecting the connecting groove (310). The pull rod (210) has an annular groove (211) formed on the side wall of one end of the pull rod (210) located in the first receiving groove (130). By driving the pull rod (210) to pull down or push up, the ends of the multiple pull claws (220) located in the first receiving groove (130) are pulled out or put into the groove (211) to press or release the HSK tool holder (300).

2. The tool holder cone adapter sleeve of claim 1 wherein, The second receiving groove (140) includes, from top to bottom, a first stepped groove (141) and a second stepped groove (142). The diameter of the first stepped groove (141) is smaller than the diameter of the second stepped groove (142) and the first receiving groove (130); The pull rod (210) is arranged from top to bottom inside the first receiving groove (130), the first stepped groove (141) and the second stepped groove (142); One end of each of the plurality of pull claws (220) is engaged with the inner wall of the second stepped groove (142), and the other end extends through the first stepped groove (141) into the interior of the first receiving groove (130).

3. The tool holder cone adapter sleeve of claim 2, wherein, A first inclined portion (221) is formed on the inner side of the other end of the plurality of said pull claws (220). The pull rod (210) has an annular second inclined portion (212) formed on it, and the second inclined portion (212) is located on the side of the groove (211) near the top opening of the first receiving groove (130).

4. The tool holder cone adapter sleeve of claim 3, wherein, The groove (211) has a trapezoidal cross section, and the opening size of the groove (211) gradually decreases radially.

5. The tool holder taper conversion sleeve of claim 4, wherein, The second inclined portion (212) is connected to the groove (211).

6. The tool holder cone adapter sleeve of claim 4 wherein, The pull rod (210) also has a ring-shaped third inclined portion (213) which is located on the other side of the groove (211) relative to the second inclined portion (212).

7. The tool holder cone adapter sleeve of claim 6 wherein, One end of the third inclined portion (213) is located inside the first receiving groove (130) and connected to the groove (211), while the other end is located inside the first stepped groove (141).

8. The tool holder cone adapter sleeve of claim 7, wherein, Notches (222) are formed on the inner surfaces of the plurality of pull claws (220) corresponding to the groove (211) and the third inclined portion (213).

9. The tool holder cone adapter sleeve of claim 3 wherein, The connecting groove (310) includes a third stepped groove (311) that is larger at the top and smaller at the bottom, and a fourth stepped groove (312). The other ends of the plurality of said pull claws (220) pass through the fourth stepped groove (312) to extend into the interior of the third stepped groove (311). The outer side of the other end of the plurality of said pull claws (220) can be movably engaged or disengaged from the first step surface inside the third step groove (311).

10. The tool holder cone adapter sleeve of claim 2 wherein, The second receiving groove (140) further includes a fifth stepped groove (143), which is located inside the conical portion (120). The fifth step groove (143) is located below and connected to the second step groove (142), and a second step surface (1431) is formed inside the fifth step groove (143). The pull claw assembly (200) further includes a pull rivet connecting rod (230) and a spring (240). The pull rivet connecting rod (230) is located inside the fifth stepped groove (143). The spring (240) is located on the second step surface inside the fifth stepped groove (143) and is sleeved on the outside of the pull rivet connecting rod (230). One end of the pull rivet connecting rod (230) is connected to the pull rod (210) and pressed against the top of the spring (240). The other end passes through the spring (240) and extends out of the cone portion (120).

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