Machining center tool changing device

Abstract

The utility model relates to the technical field of machining centers, and discloses a machining center tool changer which comprises a rotating shaft fixedly connected to an output shaft of a machining center motor and a cutterhead body fixedly installed at one end of the rotating shaft, a tool body is arranged on the outer side of the cutterhead body, and two sets of clamping assemblies are symmetrically arranged on the outer side of the tool body. Fixing blocks playing a supporting role are fixedly arranged between the clamping assemblies and the cutterhead body, the clamping assemblies are distributed on the outer side of the cutterhead body at equal angles, each clamping assembly comprises an electric telescopic rod fixedly installed on the outer end face of the corresponding fixing block, and ejection assemblies are arranged on the inner sides of the clamping assemblies. The ejection assembly is arranged on the side, close to the axis of the rotating shaft, of the tool body. According to the tool changing device of the machining center, the clamping stability of a tool is good, and meanwhile the problem that when an existing tool changing device of the machining center changes the tool, the tool is stuck due to the fact that the tool is not completely separated from the tool disc is solved.

Description

Technical Field

[0001] This utility model relates to the field of machining center technology, specifically to a tool changing device for machining centers. Background Technology

[0002] Machining centers evolved from CNC milling machines. The biggest difference between machining centers and CNC milling machines is that machining centers have the ability to automatically change machining tools. By installing tools for different purposes on the tool magazine, the machining tools on the spindle can be changed in one setup through an automatic tool changer, thus realizing multiple machining functions.

[0003] However, most existing tool changers in machining centers loosen the tool through a clamping mechanism during tool changing, thereby locking the tool holder on the tool to the machining center spindle. Occasionally, the tool may stick to the tool turret, causing the tool to not completely detach from the tool turret and resulting in tool jamming and difficulty in tool changing. Utility Model Content

[0004] The purpose of this utility model is to provide a tool changing device for machining centers, so as to solve the problem mentioned in the background art that the existing tool changing devices for machining centers occasionally cause the tool to stick to the tool turret during tool changing, resulting in the tool not being completely detached from the tool turret and causing tool jamming.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a tool changing device for a machining center, comprising a rotating shaft fixedly connected to the output shaft of a machining center motor and a tool disc body fixedly installed at one end of the rotating shaft. A tool body is provided on the outer side of the tool disc body, and two sets of clamping assemblies are symmetrically arranged on the outer side of the tool body. A fixing block that provides support is fixedly arranged between the clamping assemblies and the tool disc body. An ejection assembly is provided on the inner side of the clamping assemblies, and the ejection assembly is located on the side of the tool body closer to the axis of the rotating shaft.

[0006] As a preferred technical solution of this utility model, the clamping components are distributed at equal angles on the outer side of the cutter head body. The clamping components include an electric telescopic rod fixedly installed on the outer end face of the fixing block, and a connecting rod is fixedly connected to the top of the electric telescopic rod.

[0007] As a preferred technical solution of this utility model, the clamping assembly further includes a clamping handle disposed inside the electric telescopic rod, and a connecting rod is provided inside the clamping handle. The clamping handle is connected to the cutter head body by rotation.

[0008] As a preferred embodiment of this utility model, a connecting block is rotatably connected to the outer side of the connecting rod, and the connecting block is slidably connected to the clamping handle through a movable groove.

[0009] As a preferred technical solution of this utility model, a pad is fixedly connected to the end face of the clamping handle near the tool body, and the pad is arranged in an arc shape near the end face of the tool body, and the arc-shaped end face is evenly provided with a protrusion structure to increase the friction with the tool body.

[0010] As a preferred embodiment of the present invention, the ejection assembly includes a first connector disposed inside the clamping handle, and a second connector is slidably connected inside the first connector.

[0011] As a preferred embodiment of this utility model, the first connecting member is provided with a spring inside, and the two ends of the spring are fixedly connected to the first connecting member and the second connecting member respectively to play the role of elastically supporting the spring.

[0012] As a preferred embodiment of the present invention, the ejection assembly further includes a contact piece fixedly connected to the outer end of the second connector, and a top block is fixedly connected to the end face of the contact piece near the tool body.

[0013] As a preferred technical solution of this utility model, a baffle is fixedly connected to the end face of the clamping handle near the tool body, and the end of the baffle near the contact piece is bent and overlaps the outer end face of the contact piece.

[0014] Compared with the prior art, the beneficial effects of this utility model are: the tool changing device of the machining center has better tool clamping stability, and at the same time solves the problem that the tool sometimes sticks to the tool head during tool changing, causing the tool to not completely detach from the tool head and resulting in tool jamming.

[0015] 1. The baffle is bent near the contact plate. When the clamping assembly is in the clamping state, the baffle overlaps the outer end face of the contact plate to limit the contact plate. When the tool body is placed, the clamping handle rotates relative to the tool disc body, and the clamping angle between the individual clamping handles increases, thereby separating the baffle from the contact plate. The spring force causes the second connecting piece to push out the contact plate and the top block. The top block moves towards the tool body, which can push out the tool body and avoid the tool body from sticking to the tool disc body, which would cause the tool body to not completely detach from the tool disc body. This solves the problem that the tool sometimes sticks to the tool disc and does not completely detach from the tool disc during tool changing in the existing machining center tool changing device, causing the tool to jam.

[0016] 2. Two sets of clamping components are symmetrically arranged on the outer side of the tool body. The electric telescopic rod extends and retracts, causing the connecting rod to drive the connecting block to slide inside the movable groove. By changing the included angle between the individual clamping handles, the tool body can be clamped. Since a pad is fixedly connected to the end face of the clamping handle near the tool body, and the pad is arc-shaped close to the end face of the tool body, and the arc-shaped end face is evenly provided with a protrusion structure, it increases the friction effect between the clamping components and the tool body, making the clamping components clamp the tool body more stable. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the overall structure of the present invention from another perspective;

[0019] Figure 3 This is a schematic diagram of the overall structure of the clamping assembly of this utility model;

[0020] Figure 4 This utility model Figure 3 Enlarged structural diagram at point A in the middle.

[0021] In the figure: 1. Tool head body, 2. Rotating shaft, 3. Fixing block, 400. Clamping assembly, 401. Electric telescopic rod, 402. Connecting rod, 403. Clamping handle, 404. Movable groove, 405. Connecting block, 5. Pad block, 600. Ejection assembly, 601. First connecting piece, 602. Second connecting piece, 603. Spring, 604. Contact piece, 605. Ejector block, 7. Baffle plate, 8. Tool body. Detailed Implementation

[0022] 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.

[0023] Please see Figure 1-4This utility model provides a technical solution: a tool changing device for a machining center, including a rotating shaft 2 fixedly connected to the output shaft of the machining center motor and a tool disc body 1 fixedly installed at one end of the rotating shaft 2. A tool body 8 is provided on the outer side of the tool disc body 1, and two sets of clamping components 400 are symmetrically arranged on the outer side of the tool body 8. A fixing block 3 that provides support is fixedly arranged between the clamping components 400 and the tool disc body 1. The clamping components 400 clamp the tool body 8. A pad 5 is fixedly connected to the end face of the clamping handle 403 near the end face of the tool body 8. The pad 5 is arc-shaped and the end face of the tool body 8 is evenly provided with a protrusion structure to increase the friction with the tool body 8.

[0024] Specific examples Figure 1 and Figure 2 As shown, the clamping components 400 are distributed at equal angles on the outer side of the cutter head body 1. The clamping components 400 include an electric telescopic rod 401 fixedly installed on the outer end face of the fixing block 3, and a connecting rod 402 is fixedly connected to the top of the electric telescopic rod 401. The clamping components 400 also include a clamping handle 403 disposed on the inner side of the electric telescopic rod 401, and the connecting rod 402 is provided inside the clamping handle 403. The clamping handle 403 is connected to the cutter head body 1 by rotation. A connecting block 405 is rotatably connected to the outer side of the connecting rod 402, and the connecting block 405 is slidably connected to the clamping handle 403 through the movable groove 404. By extending and retracting the electric telescopic rod 401, the connecting rod 402 drives the connecting block 405 to slide on the inner side of the movable groove 404, so that the clamping handle 403 rotates relative to the cutter head body 1, thereby clamping the cutter body 8.

[0025] Specific examples Figure 3 and Figure 4 As shown, an ejector assembly 600 is provided inside the clamping assembly 400, and the ejector assembly 600 is located on the side of the tool body 8 near the axis of the rotating shaft 2. The ejector assembly 600 includes a first connector 601 provided inside the clamping handle 403, and a second connector 602 is slidably connected inside the first connector 601. A spring 603 is provided inside the first connector 601, and the two ends of the spring 603 are fixedly connected to the first connector 601 and the second connector 602 respectively to provide elasticity. In addition to supporting the function of the spring 603, the ejector assembly 600 also includes a contact piece 604 fixedly connected to the outer end of the second connector 602. A top block 605 is fixedly connected to the end face of the contact piece 604 near the tool body 8. Since a baffle 7 is fixedly connected to the end face of the clamping handle 403 near the tool body 8, and the baffle 7 is bent at the end near the contact piece 604, when the clamping assembly 400 is in the clamping state, the baffle 7 overlaps the outer end face of the contact piece 604 to limit the contact piece 604.

[0026] The working principle of this utility model is as follows: When using the tool changing device of this machining center, the tool is first clamped individually by multiple clamping components 400. When changing the tool, the rotating shaft 2 driven by the motor drives the tool disc body 1 to rotate, so that the tool disc body 1 drives the corresponding tool body 8 to move to the position of the tool changing shaft of the machining center for tool changing. At the same time, the tool changing shaft of the machining center moves to the corresponding tool changing position, and the electric telescopic rod 401 is shortened, so that the connecting rod 402 pulls the clamping handle 403 through the connecting block 405, so that the clamping handle 403 rotates relative to the tool disc body 1 to release the tool body 8. The connection between the tool body 8 and the tool changing shaft of the machining center is realized by the lifting and lowering of the tool changing shaft of the machining center.

[0027] Specific examples Figure 1 As shown, when the tool body 8 is placed, the clamping handle 403 rotates relative to the tool disc body 1, and the clamping angle between the individual clamping handles 403 increases, thereby causing the baffle 7 to separate from the contact piece 604. The elastic force of the spring 603 causes the second connecting member 602 to push out the contact piece 604 and the top block 605. By moving the top block 605 to the side of the tool body 8, the tool body 8 can be pushed out, avoiding the tool body 8 from sticking to the tool disc body 1 and causing the tool body 8 to be completely separated from the tool disc body 1.

[0028] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A machining center tool changer comprising a rotating shaft (2) fixedly connected to a motor output shaft of a machining center and a tool disc main body (1) fixedly installed at one end of the rotating shaft (2), characterized in that: The outer side of the cutter head body (1) is provided with a cutter body (8), the outer side of the cutter body (8) is symmetrically provided with two groups of clamping assemblies (400), and the clamping assemblies (400) and the cutter head body (1) are fixedly provided with fixed blocks (3) which play a supporting role, the inner side of the clamping assembly (400) is provided with an ejection assembly (600), and the ejection assembly (600) is arranged on the side of the cutter body (8) close to the axis of the rotating shaft (2).

2. A tool changer for a machining center according to claim 1, characterized in that: The clamping assemblies (400) are equiangularly distributed on the outer side of the cutter head body (1), the clamping assembly (400) comprises an electric telescopic rod (401) fixedly installed on the outer end surface of the fixed block (3), and the top end of the electric telescopic rod (401) is fixedly connected with a connecting rod (402).

3. A tool changer for a machining center according to claim 2, characterized in that: The clamping assembly (400) further comprises a clamping handle (403) arranged on the inner side of the electric telescopic rod (401), and the inner side of the clamping handle (403) is provided with the connecting rod (402), and the clamping handle (403) is connected with the cutter head body (1) in a rotating manner.

4. A tool changer for a machining center according to claim 3, characterized in that: The outer side of the connecting rod (402) is rotatably connected with a connecting block (405), and the connecting block (405) is slidably connected with the clamping handle (403) through a movable groove (404).

5. A tool changer for a machining center according to claim 4, characterized in that: The side end surface of the clamping handle (403) close to the cutter body (8) is fixedly connected with a pad (5), the side end surface of the pad (5) close to the cutter body (8) is arranged in an arc shape, and the arc-shaped end surface is uniformly provided with convex point structures to increase the friction with the cutter body (8).

6. A tool changer for a machining center according to claim 4, characterized in that: The ejection assembly (600) comprises a first connecting piece (601) arranged on the inner side of the clamping handle (403), and the inner side of the first connecting piece (601) is slidably connected with a second connecting piece (602).

7. A tool changer for a machining center according to claim 6, characterized in that: The inner side of the first connecting piece (601) is provided with a spring (603), and the two ends of the spring (603) are fixedly connected with the first connecting piece (601) and the second connecting piece (602) to elastically support the spring (603).

8. A tool changer for a machining center according to claim 7, characterized in that: The ejection assembly (600) further comprises a contact sheet (604) fixedly connected to the outer end of the second connecting piece (602), and the side end surface of the contact sheet (604) close to the cutter body (8) is fixedly connected with a top block (605).

9. A tool changer for a machining center according to claim 8, characterized in that: The side end surface of the clamping handle (403) close to the cutter body (8) is fixedly connected with a baffle (7), and the end of the baffle (7) close to the contact sheet (604) is arranged in a bent shape and overlaps the outer end surface of the contact sheet (604).

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