Tool holder gripping mechanism

Abstract

This utility model provides a tool holder gripping mechanism, relating to the field of CNC machine tool gripping technology. The tool holder gripping mechanism includes a gripping sleeve, a base, and a mounting block. A guide key is provided on the end face of the gripping sleeve. The base has a mounting hole for inserting the gripping sleeve, allowing the gripping sleeve to rotate around the axis of the mounting hole after insertion. The mounting block is mounted on the base, and at least one positioning post is provided in the mounting block. The positioning post is located on the outside of the gripping sleeve, and restricts the rotation stroke of the gripping sleeve when it rotates clockwise or counterclockwise. The gripping sleeve has a certain degree of rotational freedom, which makes it easy for the guide key and the tool holder keyway to be precisely aligned when the gripping sleeve rotates, allowing the guide key to be smoothly inserted into the tool holder keyway, thus avoiding tool jamming when gripping the tool holder.

Description

Technical Field

[0001] This utility model relates to the field of CNC machine tool holder gripping technology, and in particular to a tool holder gripping mechanism. Background Technology

[0002] Currently, my country's machinery processing industry is developing rapidly, especially in the field of CNC machine tool processing, where various machine tools are widely used. Before machining, a tool holder gripping mechanism is needed to take the tool out of the tool magazine, or after machining, the tool holder gripping mechanism is needed to grip the tool and put it back into the tool magazine for storage. In both of these processes, the guide key in the tool holder gripping mechanism needs to be inserted into the keyway of the tool holder first. However, during the process of inserting the guide key into the keyway of the tool holder, the guide key and the keyway of the tool holder often cannot be precisely aligned to allow the guide key to be inserted smoothly. That is, the gripping mechanism often has a tool jamming phenomenon when gripping the tool holder. Utility Model Content

[0003] The purpose of this utility model is to provide a tool handle gripping mechanism that can effectively prevent tool jamming when gripping the tool handle.

[0004] To achieve the above objectives, the technical solution of this utility model embodiment is as follows:

[0005] A tool holder gripping mechanism, comprising:

[0006] A tool gripper sleeve, wherein a guide key is provided on the end face of the tool gripper sleeve;

[0007] The base has a mounting hole for inserting the gripper sleeve, and the mounting hole allows the gripper sleeve to rotate around the axis of the mounting hole after insertion.

[0008] The mounting block is mounted on the base. At least one positioning post is provided inside the mounting block. The positioning post is located on the outside of the gripper sleeve. The positioning post is used to limit the rotation stroke of the gripper sleeve when the gripper sleeve rotates clockwise or counterclockwise.

[0009] Furthermore,

[0010] The positioning post includes two, which are respectively disposed on opposite sides of the gripper sleeve. The positioning post has a ball head at the end close to the gripper sleeve, and the gripper sleeve has a limiting plane on the side close to the positioning post.

[0011] Furthermore,

[0012] The positioning post has an external thread on its wall surface, and the mounting block has an internal thread hole that matches the external thread on the positioning post.

[0013] Furthermore,

[0014] The positioning post has an internal hexagonal hole at the end that is away from the gripper sleeve.

[0015] Furthermore,

[0016] The mounting hole is also provided with two angular contact ball bearings mounted back to back, and the gripper sleeve passes through the inner rings of the two bearings.

[0017] Furthermore,

[0018] The guide key includes two keys with unequal key widths, and the two guide keys are respectively located on the upper and lower sides of the end face of the gripper sleeve.

[0019] Furthermore,

[0020] The inner hole of the gripper sleeve is provided with two spaced and parallel guide shafts. The inner hole of the gripper sleeve is also provided with a locking block. The locking block is sleeved on both guide shafts. The two guide shafts are used to guide the locking block to move radially along the gripper sleeve. The gripper sleeve is also provided with an elastic element. The elastic element is used to push the locking block to move radially along the gripper sleeve. When the tool shank is inserted into the inner hole of the gripper sleeve, the locking block is pushed and locked into the inner cavity of the tool shank to lock the tool shank.

[0021] Furthermore,

[0022] The gripper sleeve is equipped with a push cylinder, and the drive part of the push cylinder is equipped with a push block. The push block is used to push the clamping block back after overcoming the elastic force of the elastic element under the drive of the push cylinder, so that the clamping block is pushed out of the inner cavity of the tool holder and the tool holder is released.

[0023] Furthermore,

[0024] One of the guide shafts is provided with an external threaded portion, which passes through an internal threaded hole provided on the wall of the gripper sleeve. The elastic element is a compression spring, with one end of the elastic element abutting against the clamping block and the other end abutting against the external threaded portion.

[0025] Furthermore,

[0026] The characteristic feature is that the end face of the guide shaft with the external thread is also provided with an internal hexagonal hole.

[0027] Compared with the prior art, the embodiments of this utility model have at least the following technical effects:

[0028] This utility model embodiment of the tool holder gripping mechanism includes a gripping sleeve, a base, and a mounting block. A guide key is provided on the end face of the gripping sleeve. The base has a mounting hole for inserting the gripping sleeve, allowing it to rotate around its axis after insertion. The mounting block is mounted on the base, and at least one positioning post is provided within the mounting block. The positioning post is located on the outside of the gripping sleeve, limiting its rotational stroke when rotating clockwise or counterclockwise. The gripping sleeve has a certain degree of rotational freedom, allowing the guide key to easily and accurately align with the tool holder keyway during rotation, enabling the guide key to smoothly insert into the keyway and preventing tool jamming when gripping the tool holder. Attached Figure Description

[0029] Figure 1 This is a schematic diagram showing the relative positions of the tool holder gripping mechanism and the tool holder in one embodiment;

[0030] Figure 2 This is a schematic diagram showing another angle of the relative position of the tool holder gripping mechanism and the tool holder in one embodiment;

[0031] Figure 3 This is a cross-sectional view of the relative positions of the tool holder gripping mechanism and the tool holder in one embodiment.

[0032] Explanation of icon numbers:

[0033] 10. Gripping sleeve; 11. Guide key; 12. Limiting plane; 13. Push block; 14. Guide shaft; 140. External thread; 15. Clamping block; 16. Elastic element; 17. Push cylinder;

[0034] 20. Base; 21. Mounting hole; 22. Bearing;

[0035] 30. Mounting block; 31. Positioning post; 310. Ball head;

[0036] 40. Tool holder; 41. Inner cavity; 42. Tool holder keyway. Detailed Implementation

[0037] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used in this specification of this utility model is for the purpose of describing particular embodiments only and is not intended to limit the utility model. In the following description, the expression "some embodiments" refers to a subset of all possible embodiments; however, it should be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments and can be combined with each other without conflict.

[0038] It should also be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "inner," "outer," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0039] like Figure 1-3 As shown in one embodiment of this utility model, a knife handle gripping mechanism includes a gripping sleeve 10, a base 20, and a mounting block 30. The end face of the gripping sleeve 10 is provided with a guide key 11. The base 20 has a mounting hole 21 for inserting the gripping sleeve 10, allowing the gripping sleeve 10 to rotate around the axis of the mounting hole 21 after insertion. The mounting block 30 is mounted on the base 20, and two positioning posts 31 are provided within the mounting block 30. The two positioning posts 31 are respectively located on opposite sides of the gripping sleeve 10. When the gripper sleeve 10 rotates clockwise or counterclockwise, its rotational stroke is restricted, meaning the gripper sleeve 10 has a certain degree of rotational freedom. This allows the guide key 11 and the keyway 42 of the tool holder to easily and accurately align during the rotation of the gripper sleeve 10, enabling the guide key 11 to smoothly insert into the keyway 42. This prevents the tool holder gripping mechanism from jamming when gripping the tool holder 40. In other embodiments, the mounting block 30 may also contain only a positioning post 31, located on the outside of the gripper sleeve 10, simply restricting the gripper sleeve 10 to have a certain degree of rotational freedom. Allowing the gripper sleeve 10 to float and rotate within a limited angle allows the guide key 11 to automatically align with the keyway 42 of the tool holder, avoiding jamming caused by misalignment and improving the gripping success rate.

[0040] like Figure 1-2 As shown, in one embodiment of this utility model, the positioning post 31 has a ball head 310 at one end close to the gripper sleeve 10, and the gripper sleeve 10 has a limiting plane portion 12 on the side close to the positioning post 31. The ball head 310 and the limiting plane portion 12 work together, the spherical contact of the ball head 310 reduces frictional resistance, and the limiting plane portion 12 provides stable limiting, ensuring rotational accuracy and smoothness.

[0041] like Figure 1-3As shown, in one embodiment of this utility model, the positioning post 31 has an external thread on its wall surface, and the mounting block 30 has an internal thread hole that matches the external thread on the positioning post 31. By controlling the screwing depth of the positioning post 31 into the mounting block 30, the rotation stroke of the gripper sleeve 10 can be effectively controlled, thereby precisely controlling the rotation angle range of the gripper sleeve 10, adapting to the keyway position tolerances of different specifications of tool holders, and enhancing the versatility of the mechanism.

[0042] In one embodiment of this utility model, the positioning post 31 has an internal hexagonal hole at the end away from the gripper sleeve 10. The internal hexagonal hole on the positioning post 31 facilitates adjustment of the screwing depth of the positioning post 31 onto the mounting block 30 using a hex wrench, simplifying the adjustment operation and allowing for quick adjustment of the rotational stroke without disassembling parts, thus improving efficiency.

[0043] like Figure 1-3 As shown, in one embodiment of this utility model, two angular contact ball bearings 22 mounted back-to-back are further provided in the mounting hole 21. The gripping sleeve 10 passes through the inner rings of both bearings 22. More specifically, a shoulder is provided on the shaft section of the gripping sleeve 10, and the inner ring of one of the angular contact ball bearings 22 abuts against the shoulder. An external thread is also provided on the shaft section of the gripping sleeve 10, and a locking nut is installed on the external thread. The locking nut can fix the inner rings of the two angular contact ball bearings onto the gripping sleeve 10. The support of the angular contact ball bearings 22 reduces rotational friction, ensuring smooth rotation of the gripping sleeve 10, while limiting radial displacement, facilitating the alignment of the guide key 11 with the tool holder keyway 42.

[0044] like Figure 1-3 As shown, in one embodiment of this utility model, there are two guide keys 11 with unequal key widths. The two guide keys 11 are respectively disposed on the upper and lower sides of the end face of the gripper sleeve 10. The two guide keys 11 are used in a one-to-one correspondence with the two keyways 42 of the tool holder 40. The symmetrical distribution of the two keys enhances the matching stability with the keyways 42, prevents the tool holder 40 from being deflected due to uneven force on one side, and improves the reliability of gripping the tool holder 40. In addition, the unequal key widths of the two guide keys 11, designed with different dimensions, ensure the uniqueness of the tool installation direction and avoid reverse installation.

[0045] like Figure 1-3As shown, in one embodiment of this utility model, two spaced and parallel guide shafts 14 are provided in the inner hole of the gripping sleeve 10. A locking block 15 is also provided in the inner hole of the gripping sleeve 10, and the locking block 15 is simultaneously sleeved on both guide shafts 14. The two guide shafts 14 guide the locking block 15 to move radially along the gripping sleeve 10. An elastic element 16 is also provided inside the gripping sleeve 10, and the elastic element 16 pushes the locking block 15 to move radially within the gripping sleeve 10. When the tool handle 40 is inserted into the inner hole of the gripping sleeve 10, the locking block 15 is pushed and locked into the inner cavity 41 of the tool handle 40, thus locking the tool handle 40. The tool handle 40 automatically locks upon insertion, requiring no additional operation, achieving fast and stable locking and reducing manual intervention.

[0046] like Figure 1-3 As shown, in one embodiment of this utility model, the tool holder 10 is equipped with a push cylinder 17, and the driving part of the push cylinder 17 is equipped with a push block 13. The push block 13 is used to push the locking block 15 back after overcoming the elastic force of the elastic member 16 under the drive of the push cylinder 17, so that the locking block 15 is pushed out of the inner cavity 41 of the tool holder and the tool holder 40 is released. With the help of the cylinder to push and overcome the elastic force of the elastic member 16 to push the locking block 15 back, the tool holder release response is rapid, providing a fast and accurate tool holder release function with rapid response, suitable for automated tool changing scenarios.

[0047] like Figure 1-3 As shown, in one embodiment of this utility model, one guide shaft 14 is provided with an external threaded portion 140, which passes through an internal threaded hole provided on the wall of the gripper sleeve 10. The elastic element 16 is a compression spring, one end of which abuts against the clamping block 15, and the other end abuts against the external threaded portion 140. By twisting the guide shaft 14 with the external threaded portion 140, the distance between the external threaded portion 140 and the clamping block 15 can be controlled, thereby adjusting the elastic force of the elastic element 16 located between the clamping block 15 and the external threaded portion 140, and thus controlling the clamping force of the clamping block 15 on the tool holder 40. The clamping force of the clamping block 15 on the tool holder 40 can be flexibly adjusted to adapt to tools of different weights or vibration requirements, enhancing the adaptability of the mechanism.

[0048] like Figure 1-3As shown, in one embodiment of this utility model, the end face of the guide shaft 14, which has an external thread portion 140, is also provided with an internal hexagonal hole. The internal hexagonal hole on the guide shaft 14 with the external thread portion 140 facilitates adjustment of the screwing depth of the guide shaft 14 onto the gripper sleeve 10 using a hex wrench, thereby controlling the distance between the external thread portion 140 and the clamping block 15, and thus adjusting the elastic force applied by the elastic element 16 to the clamping block 15. Furthermore, it facilitates the adjustment of the elastic force using standard tools, simplifies the maintenance process, and ensures consistent clamping force.

[0049] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. The protection scope of this utility model shall be determined by the protection scope of the claims.

Claims

1. A tool holder gripping mechanism, characterized in that, include: A tool gripper sleeve (10) is provided with a guide key (11) on its end face; The base (20) has a mounting hole (21) for inserting the gripper sleeve (10). The mounting hole (21) allows the gripper sleeve (10) to rotate around the axis of the mounting hole (21) after it is inserted. Mounting block (30) is mounted on base (20). At least one positioning post (31) is provided in the mounting block (30). The positioning post (31) is located on the outside of the gripper sleeve (10). The positioning post (31) is used to limit the rotation stroke of the gripper sleeve (10) when the gripper sleeve (10) rotates clockwise or counterclockwise.

2. The tool holder gripping mechanism according to claim 1, characterized in that, The positioning post (31) includes two, which are respectively disposed on opposite sides of the gripper sleeve (10). The positioning post (31) has a ball head (310) at the end close to the gripper sleeve (10), and the gripper sleeve (10) has a limiting plane (12) on the side close to the positioning post (31).

3. The tool holder gripping mechanism according to claim 1, characterized in that, The positioning post (31) has an external thread on its wall surface, and the mounting block (30) has an internal thread hole that matches the external thread on the positioning post (31).

4. The tool holder gripping mechanism according to claim 3, characterized in that, The positioning post (31) has an internal hexagonal hole at the end that is away from the gripper sleeve (10).

5. The tool holder gripping mechanism according to claim 1, characterized in that, The mounting hole (21) is also provided with two angular contact ball bearings (22) mounted back to back, and the gripper sleeve (10) is simultaneously inserted into the inner ring of the two bearings (22).

6. The tool holder gripping mechanism according to claim 1, characterized in that, The guide key (11) includes two keys, the two guide keys (11) have different key widths, and the two guide keys (11) are respectively located on the upper and lower sides of the end face of the gripper sleeve (10).

7. The tool holder gripping mechanism according to claim 1, characterized in that, The inner hole of the gripper sleeve (10) is provided with two spaced and parallel guide shafts (14). The inner hole of the gripper sleeve (10) is also provided with a clamping block (15). The clamping block (15) is simultaneously sleeved on the two guide shafts (14). The two guide shafts (14) are used to guide the clamping block (15) to move radially along the gripper sleeve (10). The gripper sleeve (10) is also provided with an elastic element (16). The elastic element (16) is used to push the clamping block (15) to move radially along the gripper sleeve (10) within the gripper sleeve (10). When the tool handle (40) is inserted into the inner hole of the gripper sleeve (10), the clamping block (15) is pushed and locked into the inner cavity (41) of the tool handle (40) to complete the locking of the tool handle (40).

8. The tool holder gripping mechanism according to claim 7, characterized in that, The gripper sleeve (10) is provided with a push cylinder (17), and the drive part of the push cylinder (17) is provided with a push block (13). The push block (13) is used to push the clamping block (15) back after overcoming the elastic force of the elastic member (16) under the drive of the push cylinder (17), so that the clamping block (15) is pushed out of the inner cavity (41) of the tool holder (40) and the tool holder (40) is released.

9. The tool holder gripping mechanism according to claim 7, characterized in that, One of the guide shafts (14) is provided with an external thread (140), which passes through an internal thread hole provided on the wall of the gripper sleeve (10). The elastic element (16) is a compression spring, with one end of the elastic element (16) abutting against the clamping block (15) and the other end abutting against the external thread (140).

10. The tool holder gripping mechanism according to claim 9, characterized in that, The end face of the guide shaft (14) having an external thread (140) is also provided with an internal hexagonal hole.

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