Spline type adjustable cutter

By setting adjustable adjustment fasteners and spline structures in the cutting head, the accuracy reduction caused by the wear of the cutting head is solved, and the adjustable cutting head diameter and the increase in the connection strength are achieved, which extends the use cycle and reduces the replacement cost.

CN223250692UActive Publication Date: 2025-08-22苏州咖多切削刀具有限公司
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Patent Information

Application Number
CN202422293711.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-09-20
Publication Date
2025-08-22
Estimated Expiration
2034-09-20

AI Technical Summary

Technical Problem

During the long-term cutting process of existing tools, the diameter of the tool head wear causes smaller, affecting machining accuracy, increasing replacement costs and reducing service cycles.

Method used

The spline-type adjustable tool is used to set an adjustable adjustment fastener in the cutting head, and the tapered end is adjusted using an external wrench to move it inward to expand the diameter of the cutting head. The spline structure is combined with the double-head screws to enhance the stop effect and connection strength.

Benefits of technology

It improves the use cycle of the cutting head, ensures machining accuracy, saves replacement costs, and improves the connection strength between the cutting head and the cutting rod through a simple structural design.

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Abstract

The utility model relates to a spline type adjustable cutter which comprises a cutter head and a cutter bar, the cutter head and the cutter bar are connected through a first connecting piece, a through containing cavity is formed in the cutter head, an adjusting fastener used for adjusting the diameter of the cutter head is arranged in the containing cavity, and the containing cavity comprises a containing cavity body, a first inner cavity body and a second inner cavity body. The adjusting fastener comprises a connecting end and a conical end, the diameter of the end, close to the connecting end, of the conical end is smaller than that of the other end of the conical end, the containing cavity is matched with the end, away from the connecting end, of the conical end, the diameter of the containing cavity is larger than that of the first inner cavity, and the diameter of the first inner cavity is larger than that of the end, close to the connecting end, of the conical end. The length of the first inner cavity is larger than that of the conical end, and the connecting end is in threaded connection with the tool bit. The spline type adjustable tool is simple in structure, the service life of the tool bit is prolonged, and the replacement cost is saved.
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Description

Technical Field

[0001] The utility model relates to the technical field of reamers, in particular to a spline type adjustable tool. Background Art

[0002] Existing cutting tools typically consist of a cutter head and a tool bar, connected by a connector. Over time, the cutter head can wear out, reducing its diameter. This can lead to inaccurate cutting and compromised machining results. Consequently, the cutter head needs to be replaced, increasing replacement costs and reducing its lifespan. Utility Model Content

[0003] The technical problem solved by the utility model is to provide a spline type adjustable tool, which not only has a simple structure but also increases the service life of the tool head and saves replacement costs.

[0004] The utility model solves the technical problem by adopting the following technical solution: a spline type adjustable tool, comprising a tool head and a tool rod, wherein the tool head and the tool rod are connected by a first connecting member, wherein a through accommodating cavity is provided in the tool head, wherein an adjusting fastener for adjusting the diameter of the tool head is provided in the accommodating cavity, and the accommodating cavity comprises a accommodating cavity, a first inner cavity and a second inner cavity,

[0005] The adjusting fastener includes a connecting end and a tapered end for adjusting the diameter of the cutter head, the diameter of the end of the tapered end close to the connecting end is smaller than the diameter of the other end of the tapered end, the accommodating cavity is adapted to the end of the tapered end away from the connecting end, the diameter of the accommodating cavity is larger than the diameter of the first inner cavity, the diameter of the first inner cavity is larger than the diameter of the end of the tapered end close to the connecting end, the length of the first inner cavity is longer than the length of the tapered end, the connecting end is provided with a fifth thread, the second inner cavity of the cutter head is provided with a sixth thread threadedly connected to the fifth thread, the length of the sixth thread is longer than the length of the fifth thread, the length of the second inner cavity is longer than the length of the connecting end, a first connecting hole for cooperating with an external wrench is provided in the tapered end, a first through hole is provided in the connecting end, and the first connecting hole is connected to the first through hole.

[0006] In one embodiment, the first connecting hole of the spline-type adjustable tool is configured as a first hexagonal hole for cooperating with a wrench.

[0007] In one embodiment, the tool head of the spline-type adjustable tool is provided with a positioning outer cone at one end close to the tool rod, and a plurality of splines are provided circumferentially on the positioning outer cone. A positioning inner cone for positioning and cooperating with the positioning outer cone is provided in the tool rod, and a plurality of positioning grooves for positioning and cooperating with the splines are provided circumferentially on the positioning inner cone.

[0008] In one embodiment, a second through hole connected to the first through hole is provided in the cutter head of the spline-type adjustable tool, the first connecting member is a double-headed screw, one end of the double-headed screw is provided with a first thread, and the other end of the double-headed screw is provided with a second thread, the first thread of the double-headed screw is threadedly connected to the second through hole of the cutter head, and the second thread of the double-headed screw passes through the positioning inner cone and is threadedly connected to the tool rod.

[0009] In one embodiment, a second hexagonal hole for cooperating with a wrench is provided at one end of the stud screw of the spline type adjustable tool close to the first thread.

[0010] In one embodiment, a third thread is provided on the second through hole in the positioning outer cone of the spline-type adjustable tool, which is threadably connected to the first thread of the stud screw, and a fourth thread is provided in the tool rod, which is threadably connected to the second thread of the stud screw.

[0011] The beneficial effects of this application are:

[0012] This application provides a spline-type adjustable tool. This adjustable tool incorporates a removable adjustment fastener within the cutter head. By rotating the tapered end of the adjustment fastener with an external wrench, the tapered end moves inward, providing internal support for the cutter head. This allows the cutter head diameter to be increased by approximately 0.02 mm, ensuring machining accuracy. This spline-type adjustable tool not only has a simple structure but also extends the life of the cutter head, saving replacement costs.

[0013] The spline type adjustable tool adopts a spline type structure on the positioning outer cone of the cutter head and is positioned in cooperation with the positioning groove of the positioning inner cone of the cutter bar, thereby enhancing the stopping effect between the cutter head and the cutter bar.

[0014] The spline-type adjustable tool also uses a double-headed screw to connect the cutter head and the cutter rod, thereby improving the connection strength between the cutter head and the cutter rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of a spline-type adjustable tool according to an embodiment of the present application;

[0016] Figure 2 An exploded view of a spline-type adjustable tool according to an embodiment of the present application;

[0017] Figure 3 A cross-sectional view of a spline-type adjustable tool according to an embodiment of the present application;

[0018] Figure 4 A partial cross-sectional view of a spline-type adjustable tool according to an embodiment of the present application;

[0019] Figure 5 A schematic diagram of a tool shank of a spline-type adjustable tool according to an embodiment of the present application;

[0020] in:

[0021] 1. Cutting head; 2. Cutting rod; 3. First connecting piece; 4. Adjusting fastener; 11. Accommodating cavity; 12. Positioning outer cone; 13. Spline; 14. Second through hole; 111. Accommodating cavity; 112. First inner cavity; 113. Second inner cavity; 21. Positioning inner cone; 22. Positioning groove; 23. Fourth thread; 31. Stud screw; 311. First thread; 312. Second thread; 313. Second hexagonal hole; 41. Connecting end; 42. Conical end; 412. First through hole; 421. First connecting hole. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0023] like Figure 1 and Figure 2 As shown, an embodiment of the present application provides a spline-type adjustable tool, comprising a cutter head 1 and a cutter rod 2, wherein the cutter head 1 and the cutter rod 2 are connected by a first connecting member 3, wherein a through accommodating cavity 11 is provided in the cutter head 1, wherein an adjusting fastener 4 for adjusting the diameter of the cutter head 1 is provided in the accommodating cavity 11, and wherein the accommodating cavity 11 comprises an accommodating cavity 111, a first inner cavity 112, and a second inner cavity 113.

[0024] like Figure 3 and Figure 4 As shown, the adjusting fastener 4 includes a connecting end 41 and a tapered end 42 for adjusting the diameter of the cutter head 1. The diameter of the end of the tapered end 42 close to the connecting end 41 is smaller than the diameter of the other end of the tapered end 42. The accommodating cavity 111 is adapted to the end of the tapered end 42 away from the connecting end 41. The diameter of the accommodating cavity 111 is larger than the diameter of the first inner cavity 112. The diameter of the first inner cavity 112 is larger than the diameter of the end of the tapered end 42 close to the connecting end 41. The length of the first inner cavity 112 is longer than the length of the tapered end 42. The connecting end 41 is provided with a fifth thread, the connecting end 41 is provided with a fifth thread, the second inner cavity 113 of the cutter head 1 is provided with a sixth thread threadedly connected to the fifth thread, the length of the sixth thread is longer than the length of the fifth thread, the length of the second inner cavity 113 is longer than the length of the connecting end 41, and a first connecting hole 421 for cooperating with an external wrench is provided in the tapered end 42, and a first through hole 412 is provided in the connecting end 41, and the first connecting hole 421 is connected to the first through hole 412.

[0025] Specifically, the adjusting fastener 4 includes a connecting end 41 and a tapered end 42. The connecting end 41 is cylindrical in structure. The fifth thread on the connecting end 41 is threadedly connected to the sixth thread on the second inner cavity 113 of the cutter head 1. The length of the sixth thread is longer than the length of the fifth thread, and the length of the second inner cavity 113 is longer than the length of the connecting end 41. The diameter of the tapered end 42 near the connecting end 41 is smaller than the diameter of the other end of the tapered end 42. The end with the larger diameter of the tapered end 42 is located within the accommodating cavity 111, and the end with the smaller diameter of the tapered end 42 is located within the first inner cavity 112. The diameter of the first inner cavity 112 is smaller than the end with the larger diameter of the tapered end 42 and larger than the end with the smaller diameter of the tapered end 42. The first connecting hole 421 on the tapered end 42 is adapted to engage an external wrench. The lengths of the first inner cavity 112 and the second inner cavity 113 are both longer than the tapered end 42 and the connecting end 41, allowing the adjusting fastener 4 to move into the cutter head.

[0026] First, connect the cutter head 1 and the cutter rod 2 through the first connecting member 3, then install the adjusting fastener 4 in the accommodating cavity 11 of the cutter head 1, and use a wrench to rotate the tapered end 42 of the adjusting fastener 4 so that the fifth thread of the connecting end 41 is threadedly connected to the sixth thread on the second inner cavity 113, so that the tapered end 42 is flush with the cutter head 1. When the cutter head 1 has been cut for a long time and its diameter becomes smaller, affecting the processing accuracy, the tapered end 42 of the adjusting fastener 4 is rotated in conjunction with the first connecting hole 421 with a wrench, and the tapered end 42 and the connecting end 41 move toward the first inner cavity 112 and the second inner cavity 113 of the cutter head 1. At this time, the end with the larger diameter of the tapered end 42 moves toward the first inner cavity 112, which expands and supports the cutter head 1, so that the diameter of the cutter head 1 can be increased to about 0.02 mm, thereby ensuring the processing accuracy of the cutter head 1.

[0027] In the above structure, the adjustable fastener 4 is provided in the cutter head 1 to provide an expanded support for the interior of the cutter head 1, thereby ensuring the processing accuracy of the cutter head 1. This spline-type adjustable tool not only has a simple structure, but also increases the service life of the cutter head 1 and saves the replacement cost of the cutter head 1.

[0028] like Figure 1 and Figure 4 As shown, in one embodiment, the first connecting hole 421 of the spline type adjustable tool is configured as a first hexagonal hole for mating with a wrench. This configuration facilitates mating with a hexagonal wrench in the prior art to adjust the position of the adjusting fastener 4 in the tool head 1.

[0029] like Figure 2 and Figure 5As shown, in one embodiment, the tool head 1 of the spline-type adjustable tool is provided with a positioning outer cone 12 at one end close to the tool rod 2, and a plurality of splines 13 are circumferentially provided on the positioning outer cone 12. A positioning inner cone 21 for positioning and cooperating with the positioning outer cone 12 is provided in the tool rod 2, and a plurality of positioning grooves 22 for positioning and cooperating with the splines 13 are circumferentially provided on the positioning inner cone 21.

[0030] Specifically, six splines 13 are arranged in sequence along the outer positioning cone 12 of the cutter head 1, and six positioning grooves 22 are arranged in sequence along the inner positioning cone 21 of the tool shank 2. When the outer positioning cone 12 of the cutter head 1 extends into the inner positioning cone 21 of the tool shank 2, the six splines 13 and the six positioning grooves 22 engage one by one, locking the cutter head 1 and the tool shank. This arrangement improves the locking effect between the cutter head 1 and the tool shank 2.

[0031] like Figure 4 As shown, in one embodiment, a second through hole 14 connected to the first through hole 412 is provided in the cutter head 1 of the spline-type adjustable tool, and the first connecting member 3 is a stud screw 31, one end of the stud screw 31 is provided with a first thread 311, and the other end of the stud screw 31 is provided with a second thread 312, the first thread 311 of the stud screw 31 is threadedly connected to the second through hole 14 of the cutter head 1, and the second thread 312 of the stud screw 31 passes through the positioning inner cone 21 and is threadedly connected to the tool rod 2.

[0032] Specifically, the second thread 312 at one end of the stud screw 31 is first threadedly connected to the fourth thread 23 in the tool arbor 2, and then the positioning outer cone 12 of the cutter head 1 is inserted into the positioning inner cone 21 of the cutter arbor 2. The spline 13 on the positioning outer cone 12 is positioned and matched with the positioning groove 22 on the positioning inner cone 21. At the same time, the other end of the stud screw 31 is inserted into the second through hole 14 of the cutter head 1. The long wrench in the prior art passes through the first connecting hole 421, the first through hole 412, and the second through hole 14 in sequence, and cooperates with the second hexagonal hole 313 on the stud screw 31 located in the cutter head 1. The stud screw 31 is rotated and firmly fixed between the cutter head 1 and the cutter arbor 2. The provision of the stud screw 31 facilitates the firm connection between the cutter head 1 and the cutter arbor 2.

[0033] like Figure 2 and Figure 4 As shown in one embodiment, the stud screw 31 of the spline-type adjustable tool has a second hexagonal hole 313 for engaging with a wrench at one end near the first thread 311. The second hexagonal hole 313 facilitates the use of a long wrench in the prior art to securely connect the tool head 1 and the tool shank 2.

[0034] like Figure 4As shown, in one embodiment, the second through hole 14 within the positioning outer cone 12 of the spline-type adjustable tool is provided with a third thread that is threadably connected to the first thread 311 of the stud screw 31, and the tool shank 2 is provided with a fourth thread 23 that is threadably connected to the second thread 312 of the stud screw 31. The third thread of the second through hole 14 within the cutter head 1 is threadably connected to the first thread 311 of the stud screw 31, and the fourth thread 23 of the tool shank 2 is threadably connected to the second thread 312 of the stud screw 31. This arrangement facilitates the threaded connection of the stud screw 31 with the cutter head 1 and the tool shank 2, respectively, thereby securing the cutter head 1 and the tool shank 2.

[0035] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A spline type adjustable tool, characterized in that: The present invention comprises a cutter head (1) and a cutter rod (2), wherein the cutter head (1) and the cutter rod (2) are connected via a first connecting member (3), wherein a through accommodating cavity (11) is provided in the cutter head (1), wherein an adjusting fastener (4) for adjusting the diameter of the cutter head (1) is provided in the accommodating cavity (111), and wherein the accommodating cavity (111) comprises a accommodating cavity (111), a first inner cavity (112), and a second inner cavity (113). The adjusting fastener (4) comprises a connecting end (41) and a tapered end (42) for adjusting the diameter of the cutter head (1); the diameter of one end of the tapered end (42) close to the connecting end (41) is smaller than the diameter of the other end of the tapered end (42); the accommodating cavity (111) is adapted to the end of the tapered end (42) away from the connecting end (41); the diameter of the accommodating cavity (111) is larger than the diameter of the first inner cavity (112); the diameter of the first inner cavity (112) is larger than the diameter of the end of the tapered end (42) close to the connecting end (41); the length of the first inner cavity (112) is greater than the diameter of the first inner cavity (112); The length of the tool head (1) is longer than that of the tapered end (42), the connecting end (41) is provided with a fifth thread, the second inner cavity (113) of the tool head (1) is provided with a sixth thread threadedly connected to the fifth thread, the length of the sixth thread is longer than that of the fifth thread, the length of the second inner cavity (113) is longer than the length of the connecting end (41), the tapered end (42) is provided with a first connecting hole (421) for cooperating with an external wrench, the connecting end (41) is provided with a first through hole (412), and the first connecting hole (421) is connected to the first through hole (412).

2. The spline type adjustable tool according to claim 1, characterized in that: The first connecting hole (421) is configured as a first hexagonal hole for cooperating with a wrench.

3. The spline type adjustable tool according to claim 1, characterized in that: A positioning outer cone (12) is provided at one end of the cutter head (1) close to the cutter rod (2), and a plurality of splines (13) are provided on the positioning outer cone (12) along the circumferential direction. A positioning inner cone (21) for positioning and cooperating with the positioning outer cone (12) is provided in the cutter rod (2), and a plurality of positioning grooves (22) for positioning and cooperating with the splines (13) are provided on the positioning inner cone (21) along the circumferential direction.

4. The spline type adjustable tool according to claim 3, characterized in that: The cutter head (1) is provided with a second through hole (14) connected to the first through hole (412); the first connecting member (3) is a double-headed screw (31); one end of the double-headed screw (31) is provided with a first thread (311); the other end of the double-headed screw (31) is provided with a second thread (312); the first thread (311) of the double-headed screw (31) is threadedly connected to the second through hole (14) of the cutter head (1); the second thread (312) of the double-headed screw (31) passes through the positioning inner cone (21) and is threadedly connected to the cutter rod (2).

5. The spline type adjustable tool according to claim 3, characterized in that: One end of the stud screw (31) close to the first thread (311) is provided with a second hexagonal hole (313) for cooperating with a wrench.

6. The spline type adjustable tool according to claim 3, characterized in that: A third thread is provided on the second through hole (14) in the positioning outer cone (12) and is threadedly connected to the first thread (311) of the double-headed screw (31), and a fourth thread (23) is provided in the tool rod (2) and is threadedly connected to the second thread (312) of the double-headed screw (31).