Machine tool chuck structure

Abstract

The utility model discloses a machine tool chuck structure which comprises a body, a plurality of clamping pieces are arranged on the body, a gap is formed between every two adjacent clamping pieces, and installation holes are formed in the clamping pieces. The shaft part is fixed in the mounting hole and penetrates out of the interior of the body; the sleeve cover is installed at one end of the body, a through hole allowing a shaft part to penetrate through is formed in the sleeve cover, a guide sleeve extending into the body is detachably arranged on the sleeve cover, fastening components are arranged on the sleeve cover and the guide sleeve, each fastening component comprises a second groove formed in the guide sleeve and a first groove formed in the sleeve cover, and the second groove is communicated with the first groove. The bolt is arranged in the second groove and extends into the first groove, and the nut is arranged in the first groove and fixedly connected with the bolt; the guide sleeve has the beneficial effects that the sleeve cover and the guide sleeve are stably spliced through the designed fastening part, and the sleeve cover can be detached for replacement when being worn, so that the maintenance cost is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of machine tool chuck technology, and specifically relates to a machine tool chuck structure. Background Technology

[0002] A machine tool chuck is a mechanical device used for clamping, fixing, and positioning operations. Machine tool chucks are widely used in various machine tool processing scenarios in industrial production, such as milling machines, drilling machines, and lathes. In addition, they can also be used in other process steps that require clamping and fixing workpieces.

[0003] A CNC machine tool chuck for shaft parts, disclosed in patent publication number CN220782987U, includes a body with multiple clamping members integrally formed on the body. The clamping members are distributed in a ring at equal intervals, with gaps between adjacent clamping members to allow for deformation. Mounting holes for fixing and installing shaft parts are formed between the multiple clamping members, and the mounting holes are arranged through the body along the axial direction. The body is a hollow cylinder with a channel, and a guide sleeve is fixedly installed in the channel. The guide sleeve is placed at the end of the channel away from the mounting hole, and the guide sleeve is provided with a through hole corresponding to the shaft part. The guide sleeve is interference-fitted with the body.

[0004] During insertion into the chuck or machining process, shaft parts often experience significant impact and vibration due to machining characteristics and equipment operating conditions. Inevitably, the shaft parts will frequently rub and collide with the inner wall of the guide sleeve's through-hole. After prolonged use, this high-frequency friction and collision easily leads to wear, deformation, and other damage to the guide sleeve, affecting the chuck's positioning accuracy and reducing the quality of the machined product. The interference fit between the guide sleeve and the body makes it extremely difficult to remove the guide sleeve from the body's channel if it needs to be disassembled or replaced due to wear. This disassembly process is extremely challenging, and even slight mistakes can cause additional damage to the body or guide sleeve, increasing maintenance costs, extending equipment downtime, and impacting production efficiency. Utility Model Content

[0005] The purpose of this utility model is to provide a machine tool chuck structure, which adds a guide sleeve and a cover, and adopts a connection method that is easy to disassemble and assemble, so that the guide sleeve can be easily disassembled and replaced when it is worn.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a machine tool chuck structure, comprising...

[0007] The body has multiple clamping members, with a gap between two adjacent clamping members and mounting holes formed on the multiple clamping members;

[0008] A shaft-type part, wherein the shaft-type part is fixed in a mounting hole and extends out from the interior of the body;

[0009] A cover is installed at one end of the body and has a through hole for shaft-like parts to pass through. A guide sleeve extending into the body is detachably mounted on the cover. Fastening components are provided on the cover and the guide sleeve. The fastening components include a second groove on the guide sleeve, a first groove on the cover, a bolt located inside the second groove and extending into the first groove, and a nut located inside the first groove and fixedly connected to the bolt.

[0010] Preferably, the inner wall of the guide sleeve is fitted with symmetrically distributed arc-shaped plates, and one end of the arc-shaped plates is provided with an arc-shaped clamping block that can abut against the shaft-like parts.

[0011] Preferably, the arc-shaped plate and the guide sleeve are connected by screws, and the guide sleeve is provided with a positioning post.

[0012] Preferably, the cover has a positioning groove, and the positioning post and the positioning groove are compatible, and the cover and the body are provided with stabilizing components.

[0013] Preferably, the stabilizing component includes a third groove symmetrically formed on the cover, and a screw disposed inside the third groove and screwed into the body.

[0014] Preferably, the stabilizing component includes a threaded groove formed on the body, an extension provided on the cover, and an external thread provided on the outer wall of the extension that connects with the threaded groove.

[0015] Preferably, the body is provided with stress dispersion holes communicating with the gap, and the body is provided with recesses.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] The designed fastening components ensure a stable connection between the cover and the guide sleeve, and allow for easy disassembly and replacement of the cover when it wears out, reducing maintenance costs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a partial cross-sectional view of Embodiment 1 of the present invention;

[0020] Figure 3 This is a schematic diagram of the arc-shaped plate and arc-shaped clamping block structure of this utility model;

[0021] Figure 4This is a partial cross-sectional view of Embodiment 2 of the present invention;

[0022] In the diagram: 1. Body; 11. Stress relief hole; 12. Threaded groove; 2. Clamping part; 3. Clearance; 4. Shaft part; 5. Cover; 51. First groove; 510. Nut; 52. Through hole; 53. Third groove; 54. Positioning groove; 55. Extension; 550. External thread; 6. Guide sleeve; 61. Second groove; 610. Bolt; 62. Positioning post; 7. Arc plate; 71. Arc clamping block; 8. Screw. Detailed Implementation

[0023] 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.

[0024] Example 1

[0025] Please see Figure 1 , Figure 2 and Figure 3 This is the first embodiment of the present invention, which provides a machine tool chuck structure, including...

[0026] The main body 1 is provided with multiple clamping parts 2, which are distributed in a ring at equal intervals. A gap 3 is formed between two adjacent clamping parts 2. The clamping parts 2 are pressed inward by the transmission components of an external CNC machine tool to cause elastic deformation, thereby clamping the shaft-like parts 4. The multiple clamping parts 2 are provided with mounting holes.

[0027] Shaft-type part 4 is fixed in the mounting hole and extends out from the inside of the body 1;

[0028] Cover 5 is installed at one end of body 1, and has a through hole 52 for shaft-like parts 4 to pass through. Cover 5 has a guide sleeve 6 that extends into the body 1. Cover 5 and guide sleeve 6 are spliced ​​together, and cover 5 and guide sleeve 6 are provided with fastening components. The fastening components include a second groove 61 on guide sleeve 6, a first groove 51 on cover 5, a bolt 610 inside the second groove 61 and extending into the first groove 51, and a nut 510 inside the first groove 51 and fixedly connected to the bolt 610. The bolt 610 and nut 510 are used to make the splicing of cover 5 and guide sleeve 6 stable, and cover 5 can be disassembled and replaced when it is worn.

[0029] In this embodiment, preferably, the inner wall of the guide sleeve 6 is equipped with symmetrically distributed arc-shaped plates 7, which realizes the addition of arc-shaped plates 7. One end of the arc-shaped plate 7 is provided with an arc-shaped clamping block 71 that can abut against the shaft part 4. The shaft part 4 passes through the guide sleeve 6 and abuts against the two arc-shaped clamping blocks 71. When the arc-shaped clamping block 71 is worn, the arc-shaped plate 7 can be removed and replaced.

[0030] In this embodiment, preferably, the arc plate 7 and the guide sleeve 6 are connected by screws, so that the arc plate 7 and the guide sleeve 6 are stably spliced. The guide sleeve 6 is provided with a positioning post 62, which realizes the addition of the positioning post 62.

[0031] In this embodiment, preferably, the cover 5 has a positioning groove 54, and the positioning post 62 is adapted to the positioning groove 54. By utilizing the cooperation of the positioning post 62 and the positioning groove 54, the positioning of the guide sleeve 6 and the cover 5 is increased, making the splicing of the guide sleeve 6 and the cover 5 by bolts 610 and nuts 510 more efficient. The cover 5 and the body 1 are provided with stabilizing components. The stabilizing components include a third groove 53 symmetrically opened on the cover 5, realizing the opening of the third groove 53. A screw 8 is set inside the third groove 53 and screwed into the body 1. The screw 8 is used to stabilize the splicing of the cover 5 and the body 1, and the screw 8 can be loosened to disassemble the cover 5 and the body 1.

[0032] In this embodiment, preferably, the body 1 is provided with a stress dispersion hole 11 that communicates with the gap 3 to prevent the end of the gap 3 from breaking or being damaged due to excessive stress, and the body 1 is provided with a recess.

[0033] Example 2

[0034] Please see Figure 1 , Figure 3 and Figure 4 This is the second embodiment of the present invention, which is based on the previous embodiment, but differs in that:

[0035] The cover 5 and the body 1 are provided with stabilizing components. The stabilizing components include a threaded groove 12 opened on the body 1, an extension 55 provided on the cover 5, and an external thread 550 provided on the outer wall of the extension 55 that connects with the threaded groove 12. By screwing the external thread 550 and the threaded groove 12, the cover 5 and the body 1 are stably spliced ​​together, and the cover 5 and the body 1 can be disassembled as needed.

[0036] The working principle and usage process of this utility model are as follows: When in use, the positioning pin 62 and the positioning groove 54 are used to increase the positioning of the guide sleeve 6 and the cover 5, so that the guide sleeve 6 and the cover 5 are spliced ​​more efficiently by bolts 610 and nuts 510. The cover 5 and the body 1 are stably spliced ​​by the stabilizing component. The shaft part 4 is fixed in the mounting hole and pressed between the two arc-shaped clamps 71.

[0037] Although embodiments of the present invention have been shown and described in detail 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. A machine tool chuck structure, characterized by: Comprising The body (1) is provided with a plurality of clamping pieces (2), and gaps (3) are formed between adjacent two clamping pieces (2), and the plurality of clamping pieces (2) are formed with mounting holes; The shaft part (4) is fixed in the mounting hole and passes out from the inside of the body (1); The cover (5) is installed at one end of the body (1), and the cover (5) is provided with a through hole (52) for the shaft part (4) to pass through, and the cover (5) is detachably provided with a guide sleeve (6) extending into the body (1), and the cover (5) and the guide sleeve (6) are provided with fastening parts, which include a second groove (61) formed on the guide sleeve (6), a first groove (51) formed on the cover (5), a bolt (610) arranged in the second groove (61) and extending into the first groove (51), and a nut (510) arranged in the first groove (51) and fixedly connected with the bolt (610).

2. A machine tool chuck structure according to claim 1, wherein: The inner wall of the guide sleeve (6) is provided with symmetrically distributed arc-shaped plates (7), and one end of the arc-shaped plate (7) is provided with an arc-shaped clamping block (71) which can abut against the shaft part (4).

3. A machine tool chuck structure according to claim 2, wherein: The arc-shaped plate (7) and the guide sleeve (6) are connected by screws, and the guide sleeve (6) is provided with a positioning column (62).

4. A machine tool chuck structure according to claim 3, wherein: The cover (5) is provided with a positioning groove (54), and the positioning column (62) and the positioning groove (54) are matched, and the cover (5) and the body (1) are provided with a stabilizing part.

5. A machine tool chuck structure according to claim 4, wherein: The stabilizing part includes a third groove (53) symmetrically formed on the cover (5), and a screw (8) arranged in the third groove (53) and screwed into the body (1).

6. A machine tool chuck structure according to claim 4, wherein: The stabilizing part includes a threaded groove (12) formed on the body (1), an extension (55) arranged on the cover (5), and an external thread (550) arranged on the outer wall of the extension (55) and connected with the threaded groove (12).

7. A machine tool chuck structure according to claim 1, wherein: The body (1) is provided with a stress dispersion hole (11) communicating with the gap (3), and the body (1) is provided with a recess.

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