A collet structure for impact-resistant tool holders

Abstract

This utility model discloses an impact-resistant collet structure for a tool holder, including a tool holder cylinder body, a worm gear rotatably installed inside the tool holder cylinder body, a cylindrical slot formed at the bottom of the tool holder cylinder body, a conical cross-groove collet inserted into the inner side of the cylindrical slot, a worm gear rotatably installed inside the tool holder cylinder body and meshing with the worm gear, and an impact-resistant protective structure provided on the side base surface. This application proposes an impact-resistant collet structure for a tool holder. By designing an impact-resistant protective structure on the side base of the tool holder cylinder body, this structure can effectively protect the front end of the worm gear, preventing the worm gear from being impacted by external forces during use, ensuring the positional stability of the worm gear itself, and thus ensuring the clamping stability of the tool holder on the tool. Furthermore, this impact-resistant protective structure is reasonably designed and can be directly rotated and removed later without affecting the operator's normal rotation and adjustment of the worm gear, demonstrating significant technical advantages and application value.

Description

Technical Field

[0001] This utility model belongs to the field of machine tool holder technology, specifically relating to an impact-resistant collet structure for tool holders. Background Technology

[0002] In the field of machining, the tool holder, as a key component connecting the machine tool spindle and the cutting tool, directly affects the machining accuracy and efficiency. Among them, the collet structure that uses a worm gear and worm wheel to drive a tapered cross groove collet to hold the tool is widely used in various tool holding scenarios due to its advantages such as stable clamping force and relatively simple operation. In the existing collet structure for this type of tool holder, the worm wheel is rotatably installed inside the tool holder cylinder body, and the worm is also rotatably installed inside the tool holder cylinder body and meshes with the worm wheel. The front end of the worm extends horizontally to the front surface of the tool holder cylinder side base. The operator can use an Allen wrench to rotate the worm, thereby driving the internal worm wheel to rotate, which in turn drives the threaded sleeve at the bottom of the worm wheel to rotate. Under the action of the thread, the tapered cross groove collet is lifted, so that the end of the tapered cross groove collet gradually bites the tool, realizing the clamping or disassembly of the tool.

[0003] However, this structure has a significant drawback: because the front end of the worm is exposed to the outside for a long time without any protective measures, the tool holder may be in a relatively complex working environment during actual use, with various tools and workpieces around it, which may cause bumps or impacts. Once the front end of the worm is subjected to external impact force, it is very likely to cause the worm to rotate. The rotation of the worm will change its meshing state with the worm wheel, thereby affecting the clamping stability of the tapered cross groove collet on the tool. This may cause the tool to loosen or shift during the machining process, greatly reducing the overall stability of the tool and seriously affecting the machining accuracy and product quality. Therefore, this utility model proposes an impact-resistant collet structure for tool holders. Utility Model Content

[0004] The purpose of this invention is to provide an impact-resistant collet structure for tool holders to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an impact-resistant collet structure for a knife handle, comprising a knife handle cylinder body, a worm gear rotatably mounted within the knife handle cylinder body, a cylindrical slot formed at the bottom of the knife handle cylinder body, a tapered cross-groove collet inserted into the inner side of the cylindrical slot, a worm rotatably mounted within the knife handle cylinder body and meshing with the worm gear, and a side base fixed to the outer surface of the knife handle cylinder body. The bottom end of the tapered cross-groove collet holds the knife, and the front end of the worm extends through to the front surface of the side base.

[0006] The impact-resistant protective structure set on the surface of the side base includes a U-shaped guide fixed to the side of the side base, a movable base column that movably passes through the U-shaped guide, a rotating seat that is rotatably installed at the front end of the movable base column, and an impact-resistant protective cover fixed to the side of the rotating seat, wherein the impact-resistant protective cover covers the front end of the worm gear inside.

[0007] Preferably, the impact-resistant protective structure further includes a movable structure, which is disposed between the rear end of the movable base column and the U-shaped guide seat.

[0008] Preferably, the movable structure includes a side slide plate fixed to the rear side of the movable base column and a spring installed between the side slide plate and the U-shaped guide seat.

[0009] Preferably, a rear baffle is fixed to the side of the side base relative to the rear of the movable base column.

[0010] Preferably, a guide rod is fixed between the rear baffle and the U-shaped guide seat on one side relative to the movable base column, and the guide rod movably passes through the side slide plate and the spring.

[0011] Preferably, the front end of the movable base column is fixed with a shaft block, and the rotating seat is rotatably sleeved on the surface of the shaft block.

[0012] Preferably, a U-shaped lever is fixed to the side of the rotating seat.

[0013] Preferably, the bottom surface of the worm gear is provided with an integral threaded sleeve, and the top surface of the tapered cross groove chuck is provided with a threaded post that screws into the threaded sleeve.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This application proposes an impact-resistant collet structure for tool holders. By designing an impact-resistant protective structure on the side base of the tool holder collet body, this structure can effectively protect and shield the front end of the worm, preventing the worm from being impacted by external forces during use, ensuring the positional stability of the worm itself, and thus ensuring the clamping stability of the tool holder on the tool. At the same time, the impact-resistant protective structure is reasonably designed and can be directly rotated and removed later without affecting the operator's normal rotation and adjustment of the worm. It has significant technical advantages and application value. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a structural schematic diagram from another perspective of the present invention;

[0017] Figure 3 This is a cross-sectional view of the present invention;

[0018] Figure 4 This utility model Figure 2A magnified view of a portion of region A in the middle;

[0019] Figure 5 This is a top sectional view of the impact-resistant protective structure of this utility model;

[0020] In the diagram: 1. Tool holder body; 11. Cylindrical slot; 2. Tapered cross-groove chuck; 21. Threaded post; 3. Worm gear; 4. Tool; 5. Side base; 61. U-shaped guide seat; 62. Movable base column; 63. Movable structure; 631. Side slide plate; 632. Guide rod; 633. Spring; 64. Backplate; 65. Rotary seat; 66. Shaft block; 67. Impact-resistant protective cover; 7. Worm gear; 71. Threaded sleeve. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example

[0023] Please see Figures 1 to 5 This is an embodiment of the present invention, which provides the following technical solution: an impact-resistant collet structure for a knife handle, comprising a knife handle cylinder body 1, a worm gear 7 rotatably installed inside the knife handle cylinder body 1, a cylindrical slot 11 formed at the bottom of the knife handle cylinder body 1, a tapered cross-groove collet 2 inserted into the inner side of the cylindrical slot 11, a worm 3 rotatably installed inside the knife handle cylinder body 1 and meshing with the worm gear 7, and a side base 5 fixed to the outer surface of the knife handle cylinder body 1. The bottom end of the tapered cross-groove collet 2 holds a knife 4, and the front end of the worm 3 extends through the front surface of the side base 5. The rear end of the worm 3 is rotatably installed on the inner wall of the knife handle cylinder body 1 through a bearing. The above structures are all prior art. Subsequent operators can use tools such as an Allen wrench to rotate and twist the front end of the worm 3, causing the worm 3 to drive the worm gear 7 to rotate. When the worm gear 7 rotates, it will cause the threaded post 21 and the tapered cross-groove collet 2 to rise and fall under the action of the thread, thereby achieving the clamping or loosening of the knife 4.

[0024] The impact-resistant protective structure set on the surface of the side base 5 includes a U-shaped guide seat 61 welded and fixed to the side of the side base 5, a movable base column 62 that movably passes through the U-shaped guide seat 61, a rotating seat 65 rotatably installed at the front end of the movable base column 62, and an impact-resistant protective cover 67 welded and fixed to the side of the rotating seat 65. The impact-resistant protective cover 67 covers the front end of the worm 3 inside, which can effectively wrap and protect the front end of the worm 3, avoid the worm 3 from being impacted by the outside during use, ensure the positional stability of the worm 3, and thus ensure the clamping stability of the tool holder on the tool 4. If the worm 3 needs to be rotated later, simply move the movable base column 62 forward to separate the impact-resistant protective cover 67 from the front end of the worm 3, and then rotate the rotating seat 65 180 degrees to rotate and remove the impact-resistant protective cover 67 from the front end of the worm 3, so that the worm 3 can be normally screwed.

[0025] In this embodiment, preferably, the impact-resistant protective structure further includes a movable structure 63, which is disposed between the rear end of the movable base column 62 and the U-shaped guide seat 61.

[0026] In this embodiment, preferably, the movable structure 63 includes a side slide plate 631 welded and fixed to the rear side of the movable base column 62, and a spring 633 installed between the side slide plate 631 and the U-shaped guide seat 61. Under the pushing of the spring 633, the impact-resistant protective cover 67 can stably cover the front end of the worm gear 3 during daily use.

[0027] In this embodiment, preferably, a rear baffle 64 is welded and fixed to the side of the side base 5 relative to the rear of the movable base column 62, which can support the rear end of the movable base column 62.

[0028] In this embodiment, preferably, a guide rod 632 is fixed between the rear baffle 64 and the U-shaped guide seat 61 on one side relative to the movable base column 62. The guide rod 632 movably passes through the side slide plate 631 and the spring 633, so that when the side slide plate 631 slides back and forth with the movable base column 62, the side slide plate 631 can also slide on the surface of the guide rod 632. At the same time, the guide rod 632 can also guide the spring 633 to prevent the spring 633 from falling off. When it is necessary to rotate and remove the impact-resistant protective cover 67 from the front end of the worm gear 3 later, it is only necessary to pull the movable base column 62 forward first, so that the side slide plate 631 moves forward and the spring 633 is further compressed, so that the impact-resistant protective cover 67 is removed. The protective cover 67 moves forward smoothly and separates from the front end of the worm 3. At this time, the rotating seat 65 can be rotated at the front end of the movable base column 62, so that the impact-resistant protective cover 67 can be rotated and moved directly from the front of the worm 3, removing the obstruction to the worm 3. At this time, the front end of the worm 3 can be screwed normally. After screwing, the movable base column 62 can be moved forward again and the impact-resistant protective cover 67 can be rotated back to the front end of the worm 3. Then, the impact-resistant protective cover 67 and the movable base column 62 are released. Under the push of the spring 633, the movable base column 62 moves backward and resets until it is in contact with the rear baffle 64. At this time, the impact-resistant protective cover 67 will cover the front end of the worm 3 to continue to provide impact protection.

[0029] In this embodiment, preferably, a shaft block 66 is fixed to the front end of the movable base column 62, and a rotating seat 65 is rotatably sleeved on the surface of the shaft block 66, so that the rotating seat 65 can rotate smoothly at the front end of the movable base column 62.

[0030] In this embodiment, preferably, a U-shaped lever is welded and fixed to the side of the rotating seat 65, which facilitates the subsequent operation of pulling and rotating the rotating seat 65 by the operator and makes it easier to apply force.

[0031] In this embodiment, preferably, the bottom surface of the worm gear 7 is provided with an integral threaded sleeve 71, and the top surface of the tapered cross groove chuck 2 is provided with a threaded post 21 screwed into the threaded sleeve 71. When the worm gear 7 and the threaded sleeve 71 rotate, the threaded post 21 and the tapered cross groove chuck 2 will be driven to rise and fall under the action of the thread on the inner wall of the threaded sleeve 71. When the tapered cross groove chuck 2 rises, due to its tapered structural characteristics and the cross groove opened at the bottom end of the tapered cross groove chuck 2, the bottom end of the tapered cross groove chuck 2 will deform when it is squeezed. When the tapered cross groove chuck 2 rises, it will be squeezed by the inner wall of the cylindrical slot 11, and the bottom end of the tapered cross groove chuck 2 will become tighter and tighter, so as to achieve stable clamping and clamping of the tool 4. Conversely, the bottom end of the tapered cross groove chuck 2 will loosen to facilitate the replacement of the tool 4.

[0032] Although embodiments of the present invention have been shown and described (see the detailed description above), it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An impact-resistant collet structure for a knife handle, comprising a knife handle collet body (1), a worm gear (7) rotatably mounted inside the knife handle collet body (1), a cylindrical slot (11) formed at the bottom of the knife handle collet body (1), a tapered cross-groove collet (2) inserted into the inner side of the cylindrical slot (11), a worm (3) rotatably mounted inside the knife handle collet body (1) and meshing with the worm gear (7), and a side base (5) fixed to the outer surface of the knife handle collet body (1), wherein the bottom end of the tapered cross-groove collet (2) holds a cutting tool (4), and the front end of the worm (3) extends through to the front surface of the side base (5), characterized in that: Also includes The impact-resistant protective structure set on the surface of the side base (5) includes a U-shaped guide seat (61) fixed to the side of the side base (5), a movable base column (62) that movably passes through the U-shaped guide seat (61), a rotating seat (65) rotatably installed at the front end of the movable base column (62), and an impact-resistant protective cover (67) fixed to the side of the rotating seat (65), and the impact-resistant protective cover (67) covers the front end of the worm (3) inside.

2. The impact-resistant collet structure for a tool shank according to Claim 1, characterized in that: The impact-resistant protective structure also includes a movable structure (63), which is disposed between the rear end of the movable base column (62) and the U-shaped guide seat (61).

3. The impact-resistant collet structure for a tool shank according to claim 2, characterized in that: The movable structure (63) includes a side slide plate (631) fixed to the rear side of the movable base column (62) and a spring (633) installed between the side slide plate (631) and the U-shaped guide (61).

4. The impact-resistant collet structure for a tool shank according to claim 3, characterized in that: A rear baffle (64) is also fixed to the side of the side base (5) relative to the rear of the movable base column (62).

5. The impact-resistant collet structure for a tool shank according to claim 4, characterized in that: A guide rod (632) is fixed between the rear baffle (64) and the U-shaped guide seat (61) on one side relative to the movable base column (62), and the guide rod (632) moves through the side slide plate (631) and the spring (633).

6. The impact-resistant collet structure for a tool shank according to Claim 1, characterized by: The front end of the movable base column (62) is fixed with a shaft block (66), and the rotating seat (65) is rotatably sleeved on the surface of the shaft block (66).

7. The impact-resistant collet structure for a tool shank according to Claim 1, characterized in that: A U-shaped lever is fixed to the side of the rotating seat (65).

8. The impact-resistant collet structure for a tool shank according to Claim 1, characterized by: The bottom surface of the worm gear (7) is provided with an integral threaded sleeve (71), and the top surface of the tapered cross groove chuck (2) is provided with a threaded post (21) that is screwed into the threaded sleeve (71).

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