Driven type powerful clamping knife handle

Abstract

The utility model discloses a driven type powerful clamping knife handle which comprises a knife handle body, a gland, a powerful chuck, a cutting tool, a driven shaft body, a driving wheel, a first bearing and a second bearing, the driven shaft body is rotatably installed in a hollow cavity through the first bearing and the second bearing, and external threads are arranged on the outer side wall of the tail of the powerful chuck. The inner wall of the through hole of the driven shaft body is provided with inner threads, the tail portion of the powerful chuck penetrates through the axial channel to enable the outer threads of the powerful chuck to be in threaded connection with the inner threads, the outer wall of the middle of the driven shaft body is provided with a turbine tooth portion, and the driving wheel penetrates through the side hole in the cutter handle body to enable the worm tooth portion of the driving wheel to be meshed with the turbine tooth portion of the driven shaft body. The driven shaft body can be driven to rotate synchronously by rotating the driving wheel, so that the powerful chuck is tensioned inwards, and the powerful chuck can contract to hold a cutting tool tightly while tensioning. According to the utility model, rotating force can be converted into clamping force, larger holding force is provided, and the problems of cutter shrinkage and cutter falling in the working process of the cutting tool are prevented.

Description

Technical Field

[0001] This utility model relates to the field of cutting tool holder technology, and more specifically, to a driven high-power clamping tool holder. Background Technology

[0002] CNC machining uses computer-programmed instructions to control the movement of machine tools. It is widely used in industries such as aerospace, automotive manufacturing, mold making, medical devices, and electronics. Common CNC equipment includes CNC cutting machines and CNC milling machines. The tool holder is the connection between the machine spindle and the cutting tool and other accessories. Traditional C-type tool holders are widely used in CNC machining. While they can meet general machining needs, under high loads or high-speed cutting, the clamping force may be insufficient, easily leading to tool loosening or vibration, and even tool retraction or dropping. This affects machining accuracy and surface quality, further impacting the tool's lifespan. Utility Model Content

[0003] The purpose of this utility model is to overcome the above-mentioned defects in the prior art and provide a driven high-power clamping tool holder that can convert rotational force into clamping force, provides greater clamping force, and prevents cutting tools from shrinking or falling off during operation.

[0004] To achieve the above objectives, this utility model provides a driven, high-power clamping tool holder, comprising a tool holder body, a pressure cap, a high-power chuck, a cutting tool, a driven shaft, a drive wheel, a first bearing, and a second bearing. One end of the tool holder body is open and recessed into an inner cavity. The upper end of the pressure cap is open and fixedly positioned at the opening of the inner cavity. A hollow cavity is formed between the tool holder body and the pressure cap. The upper and lower ends of the driven shaft are rotatably mounted in the hollow cavity via the first and second bearings. An axial channel connecting the lower end of the pressure cap to its upper opening is provided in the middle of the lower end. The outer wall of the tail of the high-power chuck is provided with external threads. A through-type chuck is provided in the middle of the driven shaft along its length. A through hole is provided for the passage of a heavy-duty chuck. The inner wall of the through hole is provided with internal threads. After the tail of the heavy-duty chuck passes through the axial channel, its external threads are threadedly connected to the internal threads of the through hole of the driven shaft. The cutting tool is inserted into the clamping part of the heavy-duty chuck. The outer wall of the middle part of the driven shaft is surrounded by worm gear teeth. After the driving wheel passes through the side opening on the tool holder body, its worm gear teeth mesh with the worm gear teeth of the driven shaft. The nut part of the driving wheel is rotatably inserted into the side opening of the tool holder body. By rotating the nut part of the driving wheel, the driven shaft can be driven to rotate synchronously, thereby pulling the heavy-duty chuck inward. At the same time as pulling, the heavy-duty chuck can retract and clamp the cutting tool.

[0005] Preferably, the center of the high-strength chuck is provided with a clamping hole for inserting a cutting tool, the clamping part of the high-strength chuck is elastic, and the outer wall of the clamping part of the high-strength chuck is provided with a plurality of expansion joints connecting the clamping holes along its length.

[0006] Preferably, a limiting screw is also included, which is movably connected in the center hole at the top of the inner cavity of the tool holder body.

[0007] Preferably, the first bearing and the second bearing are respectively configured as a first roller group and a second roller group, the first roller group and the second roller group are each composed of a plurality of rollers, and the rollers are configured as spherical balls or cylindrical balls.

[0008] Preferably, the upper outer side wall of the driven shaft body is provided with a first annular protrusion, the inner wall of the inner cavity of the tool holder body is provided with a first annular limiting part, and the first roller group is movably disposed between the first annular limiting part and the first annular protrusion.

[0009] Preferably, the bottom outer wall of the driven shaft body is provided with a second annular protrusion, the top inner end face of the pressure cap is provided with a second annular limiting part, and the second roller group is movably disposed between the second annular protrusion and the second annular limiting part.

[0010] Preferably, the device also includes a first sealing ring and a second sealing ring. A first annular mounting groove is provided on the top outer wall of the driven shaft body, and the first sealing ring is fitted onto the first annular mounting groove. A second annular mounting groove is recessed on the top inner end face of the gland, and the second sealing ring is embedded in the second annular mounting groove and located on the bottom surface of the driven shaft body.

[0011] Preferably, a third sealing ring is also included, which is embedded in the third annular mounting groove on the inner wall of the side opening of the tool holder body.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] This utility model has a simple, novel, and reasonable structure. By adopting a worm gear structure and a threaded connection between a powerful chuck and the driven shaft, the rotating drive wheel can drive the driven shaft to rotate through the worm gear mechanism, effectively converting power into clamping force. The tight threaded connection can lock with high torque, and the powerful chuck provides greater clamping force for the cutting tool, effectively preventing the cutting tool from loosening, retracting, or falling off during operation. It is suitable for CNC machining and can replace the traditional C-type tool holder. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of a driven high-power clamping tool holder provided in an embodiment of the present utility model;

[0016] Figure 2 This is a cross-sectional schematic diagram of a driven high-power clamping tool holder provided in an embodiment of this utility model;

[0017] Figure 3 This is an exploded schematic diagram of a driven high-power clamping tool holder provided in an embodiment of this utility model;

[0018] Figure 4 This is an exploded view of a portion of the structure of a driven high-power clamping tool holder provided in an embodiment of this utility model. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] Please refer to Figure 1 The present invention provides a driven high-power clamping tool holder, including a tool holder body 1, a pressure cap 2, a high-power chuck 3, a cutting tool 4, a driven shaft 5, a drive wheel 6, a first bearing 7 and a second bearing 8, etc. The components of this embodiment will be described in detail below with reference to the accompanying drawings.

[0021] like Figure 1 and Figure 2As shown, one end of the tool holder body 1 is open and recessed into an inner cavity 10. The upper end of the pressure cap 2 is open and fixedly placed at the opening position of the inner cavity 10. A hollow cavity 20 is formed between the tool holder body 1 and the pressure cap 2. The upper and lower ends of the driven shaft 5 are rotatably installed in the hollow cavity 20 through the first bearing 7 and the second bearing 8. An axial channel 21 is opened in the middle of the lower end of the pressure cap 2, which connects to the opening at its upper end. The outer wall of the tail of the heavy-duty chuck 3 is provided with an external thread 31. The middle of the driven shaft 5 is provided with a through hole 51 through its length for the heavy-duty chuck 3 to pass through. The inner wall of the through hole 51 is provided with an internal thread 511. After the tail of the heavy-duty chuck 3 passes through the axial channel 21, its external thread 31 is threadedly connected to the internal thread 511 of the inner wall of the through hole 51 of the driven shaft 5. The cutting tool 4 is inserted at the clamping part 32 of the heavy-duty chuck 3.

[0022] Among them, the tool holder body 1 is a modern digital machine tool output structure. This structure has stronger rigidity and more stable torque transmission. The hollow cavity 20 formed between the tool holder body 1 and the pressure cover 2 allows the driven shaft 5 to rotate freely in it. The friction and wear are reduced by the first bearing 7 and the second bearing 8. At the same time, the pressure cover 2 and the driven shaft 5 are connected to provide a space for the installation of the powerful collet 3. The tight threaded connection can be locked with high torque to better fix the cutting tool 4 and effectively prevent the cutting tool 4 from loosening during the cutting process.

[0023] Specifically, the outer wall of the driven shaft 5 is provided with a worm gear 52. After the driving wheel 6 passes through the side opening 11 on the tool holder body 1, its worm gear 61 meshes with the worm gear 52 of the driven shaft 5. The nut part 62 of the driving wheel 6 is rotatably inserted into the side opening 11 of the tool holder body 1. The driving wheel 6 drives the driven shaft 5 through the worm gear mechanism, which can effectively convert the rotational force into the tension force and the clamping force of the strong chuck 3, thus improving the stability of the clamping.

[0024] In this embodiment, the nut portion 62 of the drive wheel 6 is preferably a hexagonal nut, which can withstand higher torque. The specific implementation can be selected as needed, and this embodiment does not limit it.

[0025] In practice, the operator uses a hex wrench to turn the nut part 62 of the drive wheel 6. Since the worm gear 61 of the drive wheel 6 meshes with the turbine gear 52 of the driven shaft 5, the drive shaft 5 can be driven to rotate synchronously when rotated, thereby pulling the heavy-duty chuck 3 inward. At the same time, the heavy-duty chuck 3 can retract and hold the cutting tool 4, which can achieve a clamping force of more than 500 torque.

[0026] like Figure 3As shown, the center of the chuck 3 is provided with a clamping hole 33 for inserting the cutting tool 4 through its length direction. The clamping part 32 of the chuck 3 is elastic. Several expansion joints 34 connecting the clamping hole 33 are provided around the outer wall of the clamping part 32 of the chuck 3 along its length direction.

[0027] The clamping hole 33 has a straight opening design, which can firmly fix the cutting tool 4 in the heavy-duty chuck 3 and provide precise positioning, reducing the offset and vibration of the cutting tool 4. The expansion joint 34 allows the heavy-duty chuck 3 to have a certain elasticity and expansion capacity in the clamping, reducing stress concentration.

[0028] Preferably, it may also include a limiting screw 9 for adjusting the clamping depth of the tool, the limiting screw 9 being movably connected in the center hole 101 at the top of the inner cavity 10 of the tool holder body 1.

[0029] In this embodiment, the first bearing 7 and the second bearing 8 can be configured as a first roller group and a second roller group, respectively. The first roller group and the second roller group are each composed of a number of rollers. The rollers are configured as spherical balls or cylindrical balls, preferably steel spherical balls.

[0030] The upper outer side wall of the driven shaft 5 can be provided with a first annular protrusion 53, and the inner wall of the inner cavity 10 of the handle body 1 is provided with a first annular limiting part 102. The first roller group is movably disposed between the first annular limiting part 102 and the first annular protrusion 53.

[0031] The bottom outer wall of the driven shaft 5 can be provided with a second annular protrusion 54, and the top inner end face of the pressure cover 2 is recessed with a second annular limiting part 22. The second roller group is movably disposed between the second annular protrusion 54 and the second annular limiting part 22.

[0032] like Figure 4 As shown, it may also include a first sealing ring 12 and a second sealing ring 13. A first annular mounting groove 55 is provided on the top outer wall of the driven shaft 5. The first sealing ring 12 is sleeved on the first annular mounting groove 55. A second annular mounting groove 23 is recessed on the top inner end face of the pressure cover 2. The second sealing ring 13 is embedded in the second annular mounting groove 23 and located on the bottom surface of the driven shaft 5.

[0033] Furthermore, it may also include a third sealing ring 14, which is embedded in the third annular mounting groove 111 on the inner wall of the side opening 11 of the tool holder body 1.

[0034] Specifically, the first sealing ring 12, the second sealing ring 13, and the third sealing ring 14 effectively prevent dust, moisture, and other external substances from entering the hollow inner cavity 20, thereby protecting the driven shaft 5 and the drive wheel 6 and other components inside. They also improve the stability of the cutting tool 4 during use, reduce vibration and impact, and improve machining accuracy.

[0035] In summary, this utility model, by employing a worm gear structure and a threaded connection between a powerful collet and the driven shaft, allows the rotating drive wheel to drive the driven shaft to rotate via the worm gear mechanism, effectively converting power into clamping force. The tight threaded connection enables locking with high torque, and the powerful collet provides greater clamping force for the cutting tool, effectively preventing tool loosening, tool retraction, and tool drop during operation. It is suitable for CNC machining and can replace traditional C-type tool holders.

[0036] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.

Claims

1. A driven high-power clamping tool holder, characterized in that: The tool holder includes a tool holder body (1), a pressure cap (2), a heavy-duty chuck (3), a cutting tool (4), a driven shaft (5), a drive wheel (6), a first bearing (7), and a second bearing (8). One end of the tool holder body (1) is open and recessed into an inner cavity (10). The upper end of the pressure cap (2) is open and fixedly covers the opening of the inner cavity (10). A hollow cavity (20) is formed between the tool holder body (1) and the pressure cap (2). The driven shaft... The upper and lower ends of the body (5) are rotatably mounted in the hollow cavity (20) via the first bearing (7) and the second bearing (8). The lower end of the pressure cap (2) has an axial channel (21) connecting to its upper opening. The outer side wall of the tail of the heavy-duty chuck (3) is provided with external threads (31). The middle part of the driven shaft (5) is provided with a through hole (51) along its length for the heavy-duty chuck (3) to pass through. The inner wall of the through hole (51) is provided with... The high-strength chuck (3) has an internal thread (511). After the tail of the high-strength chuck (3) passes through the axial channel (21), its external thread (31) is threadedly connected to the internal thread (511) on the inner wall of the through hole (51) of the driven shaft (5). The cutting tool (4) is inserted in the clamping part (32) of the high-strength chuck (3). The outer wall of the middle part of the driven shaft (5) is surrounded by a turbine tooth (52). The driving wheel (6) passes through the side opening on the tool holder body (1). (11) Then the worm gear (61) meshes with the turbine gear (52) of the driven shaft (5). The nut part (62) of the driving wheel (6) is rotatably inserted into the side opening (11) of the tool holder body (1). By rotating the nut part (62) of the driving wheel (6), the driven shaft (5) can be driven to rotate synchronously, thereby pulling the heavy-duty chuck (3) inward. While pulling, the heavy-duty chuck (3) can retract and hold the cutting tool (4).

2. The driven high-power clamping tool holder according to claim 1, characterized in that: The powerful chuck (3) has a clamping hole (33) through its middle part along its length for inserting a cutting tool (4). The clamping part (32) of the powerful chuck (3) has elasticity. The outer wall of the clamping part (32) of the powerful chuck (3) has several expansion joints (34) that connect to the clamping hole (33) along its length.

3. The driven high-power clamping tool holder according to claim 1, characterized in that: It also includes a limiting screw (9), which is movably connected in the top center hole (101) of the inner cavity (10) of the handle body (1).

4. The driven high-power clamping tool holder according to claim 1, characterized in that: The first bearing (7) and the second bearing (8) are respectively configured as a first roller group and a second roller group, and the first roller group and the second roller group are each composed of a number of rollers, and the rollers are configured as spherical balls or cylindrical balls.

5. A driven high-power clamping tool holder according to claim 4, characterized in that: The upper outer side wall of the driven shaft (5) is provided with a first annular convex eave (53), and the inner wall of the inner cavity (10) of the handle body (1) is provided with a first annular limiting part (102). The first roller group is movably disposed between the first annular limiting part (102) and the first annular convex eave (53).

6. The driven high-power clamping tool holder according to claim 4, characterized in that: The driven shaft (5) has a second annular protrusion (54) protruding outward on the bottom outer side wall, and the top inner end face of the pressure cover (2) has a second annular limiting part (22) recessed. The second roller group is movably disposed between the second annular protrusion (54) and the second annular limiting part (22).

7. A driven high-power clamping tool holder according to claim 1, characterized in that: It also includes a first sealing ring (12) and a second sealing ring (13). A first annular mounting groove (55) is provided on the top outer wall of the driven shaft (5). The first sealing ring (12) is fitted on the first annular mounting groove (55). A second annular mounting groove (23) is recessed on the top inner end face of the pressure cap (2). The second sealing ring (13) is embedded in the second annular mounting groove (23) and located on the bottom surface of the driven shaft (5).

8. A driven high-power clamping tool holder according to claim 1, characterized in that: It also includes a third sealing ring (14), which is embedded in the third annular mounting groove (111) on the inner wall of the side opening (11) of the handle body (1).

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