Tool changer and machine tool

Abstract

The utility model provides a kind of tool changing device of machine tool and machine tool, the tool changing device is used for tool magazine, the tool magazine includes gripper for placing tool and the tool changing mouth for tool changing, the tool changing device includes fixed seat, tool changing mechanism and sliding support mechanism, the tool changing mechanism includes tool changing arm, the both ends of the tool changing arm have the clamping mouth for clamping tool, the sliding support mechanism includes mounting seat and first driving part, the mounting seat is slidably arranged on the fixed seat, the tool changing arm is rotatably arranged on the mounting seat, the first driving part is arranged between the fixed seat and the mounting seat, for driving the mounting seat relative to the fixed seat sliding to make the clamping mouth close to or away from the tool changing mouth.The utility model technical scheme provides tool changing device, and the service life of tool magazine can be improved.

Description

Technical Field

[0001] This utility model relates to the field of processing equipment technology, and in particular to a tool changing device for a machine tool and a machine tool. Background Technology

[0002] The tool magazine is one of the core components of CNC machine tools (such as machining centers). Its main function is to provide tool storage and rapid tool changing for automated machining. It can also work with an Automatic Tool Changer (ATC) to achieve unattended tool changing.

[0003] However, when the machine tool spindle needs to perform the next machining operation, the tool needs to be changed. Existing straight-line tool magazines need to be pushed from the back of the worktable to the front of the worktable before changing tools with the spindle (such as the machine tool in patent publication number CN212946729 U). This will cause some tools in the tool magazine that do not need to be changed to be pushed to the front of the worktable. These tools are no longer protected and are very likely to be contaminated by cutting fluid and chips, affecting the tool life.

[0004] Therefore, how to move only the tool for the next process under the spindle during tool changing, while keeping the tools that do not need to be replaced stored in the tool magazine and protected by the tool magazine, thereby improving the tool magazine's lifespan, is an urgent problem to be solved. Utility Model Content

[0005] This utility model provides a tool changing device and a machine tool, which can improve the life of the tool magazine.

[0006] This utility model provides a tool changing device for a machine tool, used in a tool magazine. The tool magazine includes grippers for placing tools and a tool changing port for changing tools. The tool changing device includes a fixed base, a tool changing mechanism, and a sliding support mechanism. The tool changing mechanism includes a tool changing arm with clamping ports at both ends for holding tools. The sliding support mechanism includes a mounting base and a first driving member. The mounting base is slidably disposed on the fixed base, and the tool changing arm is rotatably disposed on the mounting base. The first driving member is disposed between the fixed base and the mounting base and is used to drive the mounting base to slide relative to the fixed base so that the clamping ports move closer to or further away from the tool changing port.

[0007] In some feasible embodiments, the sliding support mechanism further includes a slider disposed between the bottom of the fixed base and the mounting base, wherein the mounting base can reciprocate between a first position close to the fixed base and a second position away from the fixed base along a first direction via the slider;

[0008] In the tool changing state of the tool changing mechanism, the tool changing mechanism and the gripper are arranged side by side along a first direction, and the clamping opening of the tool changing mechanism faces the opening of the gripper at the tool changing port.

[0009] In some feasible embodiments, the mounting base includes a fixed base and a sliding base, the sliding element includes a guide rail and a slider, the slider is fixedly disposed on the bottom of the fixed base, and the guide rail is fixedly disposed on the sliding base;

[0010] The first driving component includes a drive motor and a transmission belt. The drive motor is fixed on the fixed base, and the output end of the drive motor is driven to be connected to the transmission belt. The transmission belt is connected to the sliding base through a connector, and the transmission belt is used to drive the mounting base and the tool changing mechanism to slide relative to the fixed base.

[0011] In some feasible embodiments, the connecting member is disposed at the end of the sliding seat away from the tool changing mechanism; the connecting member includes a toothed plate, an adjusting block, and a pressure block; the toothed plate is fixed on the transmission belt, and the toothed plate is fixed on the sliding seat by the pressure block; the adjusting block is disposed between the pressure block and the toothed plate, and is used to adjust the clamping force between the transmission belt and the sliding member;

[0012] The number of guide rails, the number of transmission belts, and the number of sliding seats are all at least two. Any two sliding seats are spaced apart. Each sliding seat is provided with one guide rail and one transmission belt. Each transmission belt is located inside the corresponding guide rail and is close to one guide rail.

[0013] In some feasible implementations, the first driving member further includes a driving gear and a driven gear, and the sliding support mechanism further includes a first support base and a second support base;

[0014] The first support base and the second support base are fixedly disposed at the bottom of the fixed base. The driving gear is rotatably disposed in the first support base and is connected to the output end of the drive motor. The driven gear is rotatably disposed in the second support base. The transmission belt is sleeved on the outer periphery of the driving gear and the driven gear. The transmission belt is a synchronous belt.

[0015] The sliding support mechanism further includes a tensioning mechanism, which is disposed between the fixed base and the first support base or the second support base, and is used to adjust the distance between the first support base and the second support base.

[0016] In some feasible implementations, the tensioning mechanism includes a positioning block and a pulling member. The positioning block is fixedly disposed at the bottom of the fixed base and is fixedly disposed close to the first support base or the second support base along the moving direction of the mounting base.

[0017] The positioning block is provided with a detachment-preventing through hole along the moving direction of the mounting base. The pulling member is inserted into the detachment-preventing through hole and can rotate within the detachment-preventing through hole. The pulling member is also threadedly connected to the first support base or the second support base. The tension of the transmission belt is adjusted by adjusting the threaded depth with the first support base or the second support base.

[0018] In some feasible embodiments, the mounting base includes a side plate and a support plate disposed on the top of the side plate, the side plate being fixedly connected to the sliding base;

[0019] The tool changing mechanism also includes a rotary cylinder and a tool holder. The rotary cylinder is mounted on the support plate and arranged side by side with the tool magazine. The tool changing arm is mounted on the rotating shaft of the rotary cylinder, and tool holders are fixedly mounted at both ends of the tool changing arm.

[0020] In some feasible embodiments, the tool changing device further includes a collision avoidance member disposed between the mounting base and the fixed base; in the state where the mounting base is moved toward the fixed base, the contact between the mounting base and the fixed base via the collision avoidance member precedes the contact between the tool changing mechanism and the gripper; and / or

[0021] A telescopic cover corresponding to the number of sliding members is provided between the mounting base and the fixed base, and each telescopic cover covers a group of sliding members.

[0022] In some feasible implementations, the number of tool magazines is at least two, the number of tool changing mechanisms is the same as the number of tool magazines, and the tool magazines further include a second drive unit, a reversing transmission mechanism corresponding to the number of tool magazines, and a transmission shaft disposed between any two of the reversing transmission mechanisms. The second drive unit, the reversing transmission mechanism, and the transmission shaft are arranged in a straight line on the fixed base. The output end of the reversing transmission mechanism is connected to the gripper via a transmission drive. The sides of two adjacent reversing transmission mechanisms are connected via the transmission shaft. The second drive unit drives the gripper of each tool magazine to rotate synchronously through the reversing transmission mechanism and the transmission shaft.

[0023] This utility model also provides a machine tool, including a base, a column disposed on the base, and a spindle disposed on the column.

[0024] It also includes the aforementioned tool changing device, wherein the tool changing device is fixedly mounted on the base or column, and the tool changing device cooperates with the spindle to perform tool changing.

[0025] The tool changing device of the aforementioned machine tool includes a fixed base, a tool changing mechanism, and a sliding support mechanism. The tool changing mechanism includes a tool changing arm with clamping ports at both ends for holding the tool. The sliding support mechanism includes a mounting base and a first driving member. The mounting base is slidably disposed on the fixed base, and the tool changing arm is rotatably disposed on the mounting base. The first driving member is disposed between the fixed base and the mounting base and is used to drive the mounting base to slide relative to the fixed base so that the clamping ports move closer to or further away from the tool changing port.

[0026] By moving the tool changing mechanism, the tool to be replaced is moved between the spindle and the tool magazine. Compared with the existing scheme that pushes out the entire straight-line tool magazine, during tool changing, the tool changing device keeps the tool that does not need to be replaced in the tool magazine and will not move under the spindle. This avoids the cutting fluid from easily contaminating the tool that does not need to be replaced, protects the tool that does not need to be replaced, and improves the life of the tool magazine. Attached Figure Description

[0027] 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 only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of a tool changing device for a machine tool according to an embodiment of the present invention.

[0029] Figure 2 This is a schematic diagram of a single channel in a tool changing device for a machine tool according to an embodiment of the present invention.

[0030] Figure 3 This is a schematic diagram of the tool changing mechanism in the retracted state in a tool changing device of a machine tool according to an embodiment of the present invention.

[0031] Figure 4 This is a schematic diagram of the tool changing mechanism in the extended state of a tool changing device for a machine tool according to an embodiment of the present invention.

[0032] Figure 5 This is a partially exploded schematic diagram of the sliding support mechanism in the tool changing device of a machine tool according to an embodiment of the present invention.

[0033] Component Symbol Explanation

[0034] 100. Tool magazine; 110. Clamping jaws; H. Tool changer; 120. Second drive unit; 130. Reversing transmission mechanism; 131. Housing; 132. Power shaft; 133. Reversing component; 140. Drive shaft;

[0035] 200. Fixture; D. Cutting tool; 201. Anti-collision component; 202. Telescopic protective cover;

[0036] 300. Tool changing mechanism; 310. Tool changing arm; J. Clamping port; 320. Rotary cylinder; 330. Tool holder;

[0037] 400. Sliding support mechanism; 410. Mounting base; 411. Support; 4111. Side plate; 4112. Support plate; 412. Sliding seat; 420. First driving component; 421. Drive motor; 422. Transmission belt; 423. Driving gear; 424. Driven gear; 430. Sliding component; 431. Slider; 432. Guide rail; 440. Connecting component; 441. Gear; 442. Adjusting block; 443. Pressure block; 450. First support seat; 460. Second support seat; 470. Tensioning mechanism; 471. Positioning block; K. Anti-detachment through hole; 472. Pulling component.

[0038] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0039] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0041] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] To provide a clearer and more accurate understanding of the present invention, a detailed description will now be provided in conjunction with the accompanying drawings. The accompanying drawings illustrate examples of embodiments of the present invention, wherein the same reference numerals denote the same elements. It is to be understood that the scale shown in the accompanying drawings is not the actual scale of the present invention, but is for illustrative purposes only and is not a drawing based on the original dimensions.

[0043] The primary function of a tool magazine is to provide tool storage and quick tool changing capabilities for automated machining. When the machine tool spindle needs to proceed to the next machining operation, the tool needs to be changed. Existing linear tool magazines require all tools to be pushed from the back of the worktable to the front before changing tools with the spindle. This results in some tools that do not need to be changed being pushed to the front of the worktable. These tools are unprotected and are highly susceptible to contamination by cutting fluid and chips, affecting their lifespan.

[0044] Please refer to Figure 1 and 2 To minimize the risk of contamination of unused tools during tool changing and extend the tool magazine's lifespan, this embodiment provides a tool changing device for a machine tool 100. The device includes a fixed base 200, a tool changing mechanism 300, and a sliding support mechanism 400. The tool changing mechanism 300 moves between the tool magazine 100 and the machine tool spindle via the sliding support mechanism 400, moving the tool D to be changed between the spindle and the tool magazine 100. Compared to existing solutions that push out the entire linear tool magazine, this tool changing device keeps the unused tool D within the tool magazine 100 during tool changing, preventing it from moving below the spindle. This avoids easy contamination of the unused tool D by cutting fluid, protecting it and extending the tool magazine 100's lifespan.

[0045] The tool magazine 100 is used to store cutting tools D. The tool magazine 100 includes grippers 110 for placing the cutting tools D and a tool changing port H for changing tools. There are at least two grippers 110, each gripper 110 holding the shank of one cutting tool D. The tool changing port H is a position point; the position of the gripper 110 closest to the tool changing mechanism 300 along a first direction is the tool changing port H. When the gripper 110 moves to this position point, if the gripper 110 is not holding a cutting tool D, it is used to retract the machined cutting tool D. If the gripper 110 holds a cutting tool D, the cutting tool D on the gripper 110 is used for the next machining operation of the machine tool spindle, and the cutting tool D on the gripper 110 needs to be moved onto the machine tool spindle.

[0046] The tool magazine 100 engages with the machine tool spindle for tool changing at least through the tool changing mechanism 300. It can be understood that in this embodiment, the tool magazine 100 is a chain-type tool magazine, rotatably supported on the fixed base 200, with its rotation axis vertical. The tool magazine 100 and the tool changing mechanism 300 are arranged side-by-side along the length of the fixed base 200. The length of the fixed base 200 is horizontal, that is... Figure 1 The first direction in the middle. Vertical direction is... Figure 1 The second direction. The width direction of the fixing base 200 is perpendicular to both the first and second directions. In this embodiment, the cross-sectional area of ​​the bottom of the fixing base 200 along the horizontal direction is larger than the cross-sectional area of ​​the top of the fixing base 200 along the horizontal direction, thereby ensuring that the chain-type tool magazine can be installed while saving the space occupied by the top of the fixing base 200 and reducing the material used for the fixing base 200.

[0047] The fixed base 200 is used to provide support for the structural components installed on the fixed base 200. In this embodiment, the fixed base 200 is used to install the tool magazine 100, the tool changing mechanism 300 and the sliding support mechanism 400. The fixed base 200 has a three-dimensional structure, and the tool magazine 100 is supported on the fixed base 200.

[0048] In some other embodiments, the tool magazine 100 may be a roller-type tool magazine and is capable of rotating along the width direction of the fixed base 200 as a rotation axis. The tool magazine 100 may also move up and down along a second direction to directly exchange tools D with the tool changing mechanism 300. The structure of the tool magazine 100 is not limited to this, as long as the tool magazine 100 can directly switch tools D with the tool changing mechanism 300 or indirectly switch tools D with the tool changing mechanism 300 through other devices (such as a robot or a tool retrieval mechanism).

[0049] The specific travel of the tool changing mechanism 300 is described below. The tool changing mechanism 300 includes a tool changing arm 310, which has clamping ports J at both ends for holding the tool D. The sliding support mechanism 400 includes a mounting base 410 and a first driving member 420. The mounting base 410 is slidably disposed on the fixed base 200, and the tool changing arm 310 is rotatably disposed on the mounting base 410. The first driving member 420 is disposed between the fixed base 200 and the mounting base 410, and is used to drive the mounting base 410 to slide relative to the fixed base 200 so that the clamping ports J move closer to or further away from the tool changing port H. The tool changing arm 310 is used to receive the tool D stored in the tool magazine 100 for the next machining operation, and under the drive of the sliding support mechanism 400, it moves towards the spindle of the machine tool and replaces the tool D for the next machining operation onto the spindle of the machine tool. Specifically, the tool changing arm 310 can move from the direction close to the tool magazine 100 and from the direction away from the tool magazine 100 via the sliding support mechanism 400. The travel distance is between the tool magazine 100 and the area below the machine tool spindle. In this way, the tool to be replaced is pushed out from back to front by the tool changing arm 310, instead of pushing out the tool D that does not need to be replaced to the area below the spindle as in the existing straight-line tool magazine. This saves power output and protects the tool D that does not need to be replaced.

[0050] Please refer to Figure 1 and 3 In the tool changing mechanism 300 in the tool picking and placing state (that is, when the sliding support mechanism 400 is in the tool picking and placing state), Figure 3 In the first direction, the tool changing arm 310 and the gripper 110 are arranged side by side, and the clamping port J of the tool changing arm 310 faces the opening of the gripper 110 at the tool changing port H, so as to facilitate the tool changing arm 310 to take out the tool D from the tool magazine 100 or put the tool D back into the tool magazine 100.

[0051] Please refer to Figure 3 and 4 The sliding support mechanism 400 includes a mounting base 410 and a first driving member 420. The tool changing mechanism 300 is rotatably disposed on the mounting base 410, and the mounting base 410 is slidably disposed on the fixed base 200. The first driving member 420 is disposed between the fixed base 200 and the mounting base 410, and is used to drive the mounting base 410 to slide relative to the fixed base 200 so that the clamping port J moves closer to or further away from the tool changing port H.

[0052] Please refer to Figure 3 and 4To facilitate the movement of the mounting base 410 relative to the fixed base 200, the sliding support mechanism 400 further includes a sliding member 430. The sliding member 430 is disposed between the bottom of the fixed base 200 and the mounting base 410. The mounting base 410 can move along a first direction to a first position close to the fixed base 200 via the sliding member 430 (see reference). Figure 3 ) and a second position away from the fixed base 200 (see Figure 4 The tool changer 300 moves back and forth between the mounting base 410 and the tool magazine 100. When the mounting base 410 is in the first position, the tool changer 300 is adjacent to the tool magazine 100 and arranged side by side along the first direction. When the mounting base 410 is in the second position, the tool changer 300 is located below or to the side of the machine tool spindle. The sliding member 430 is disposed between the fixed base 200 and the mounting base 410 to support the mounting base 410 and the tool changer 300, and to convert the friction between the mounting base 410 and the fixed base 200 into sliding friction. The sliding member 430 is disposed at the bottom of the fixed base 200 and the tool magazine 100 is disposed at the top of the fixed base 200. This makes full use of the space on the fixed base 200 and hides the sliding member 430, improving the compactness of the machine tool.

[0053] Please refer to Figure 3 The sliding member 430 is disposed at the bottom of the fixed base 200, making the height of the sliding member 430 relatively low. In order to raise the height of the clamping port J of the tool changing mechanism 300 to the same height as the clamping jaw 110, the tool changing mechanism 300 also includes a rotary cylinder 320 and a tool holder 330. The rotary cylinder 320 is disposed on the mounting base 410 and arranged side by side with the tool magazine 100. The tool changing arm 310 is disposed on the rotating shaft of the rotary cylinder 320. Two tool holders 330 are disposed on the tool changing arm 310. The rotary cylinder 320 is used to drive the tool changing arm 310 and the tool holders 330 to rotate, and is also used to raise the height of the tool changing arm 310 and the tool holders 330, so that the tool holders 330 are arranged vertically and flush with the tool magazine 100 disposed on the fixed base 200.

[0054] The tool changing arm 310 is used to mount the tool holder 330, which is used to hold the tool D. The rotary cylinder 320 is mounted on the mounting base 410 and arranged side by side with the tool magazine 100. The tool changing arm 310 is mounted on the rotating shaft of the rotary cylinder 320. Both ends of the tool changing arm 310 are fixedly equipped with tool holders 330. This allows the tool changing arm 310 to move the tool D to be replaced in the tool magazine 100 to the machine tool spindle, and the tool changing arm 310 can also remove the tool D that has been machined on the spindle.

[0055] Please refer to Figure 3 and 4To facilitate the connection between the sliding member 430 and the tool changing mechanism 300, the mounting base 410 includes a support 411 and a sliding seat 412. The sliding seat 412 is slidably disposed on the bottom of the fixed base 200 via the sliding member 430. The support 411 is fixedly connected to one side of the sliding seat 412. The support 411 includes a side plate 4111 and a support plate 4112 disposed on the top of the side plate 4111. The side plate 4111 is fixedly connected to the sliding seat 412. The side of the side plate 4111 is fixedly connected to the side of the sliding seat 412. The tool changing mechanism 300 is disposed on the support 411. This increases the height of the structural component installed on the top surface of the support plate 4112 relative to the side plate 4111. By increasing the height of the structural component installed on the top surface of the support plate 4112, the structural component installed on the support plate 4112 is arranged side by side with the tool magazine 100, which makes it easier for the tool clip 330 and the gripper 110 of the tool magazine 100 to be at the same height, and facilitates the movement of the tool D between the tool clip 330 and the gripper 110. In addition, the number of tool clips 330 is two, which also makes the rotation of the tool changing arm 310 of the tool changing mechanism 300 more stable.

[0056] The specific structure of the slider 430 is described below. The slider 430 includes a guide rail 432 and a slider 431. The slider 431 is fixedly disposed on the bottom of the fixed base 200, and the guide rail 432 is fixedly disposed on the slider base 412. In this embodiment, each slider 430 includes two sliders 431, thereby increasing the load capacity of the slider 430. In some other embodiments, the guide rail 432 is fixedly disposed on the bottom of the fixed base 200, and the slider 431 is fixedly disposed on the slider base 412, which can be flexibly adjusted as needed.

[0057] Please refer to Figure 3 The first driving component 420 includes a drive motor 421 and a transmission belt 422. The number of guide rails 432, the number of transmission belts 422, and the number of sliding seats 412 are all at least two. Any two sliding seats 412 are spaced apart. Each sliding seat 412 is provided with one guide rail 432 and one transmission belt 422. Each transmission belt 422 is located inside the corresponding guide rail 432 and is positioned close to one guide rail 432. One side of each sliding seat 412 is fixedly connected to a support 411, thereby improving the sliding stability of the mounting base 410. In this embodiment, the number of guide rails 432, the number of transmission belts 422, and the number of sliding seats 412 are all two. In some other embodiments, the number of guide rails 432, the number of transmission belts 422, and the number of sliding seats 412 are three or more, enabling the machine tool to process at least three channels simultaneously.

[0058] Please refer to Figure 4 and 5 The following describes the specific structure of the first driving component 420 that drives the sliding component 430 to move relative to the fixed base 200. The transmission belt 422 is a gear belt, which can ensure the accuracy of the tool changing mechanism 300's extension and ensure smooth tool changing. Furthermore, the transmission belt 422 occupies less vertical space, which can make reasonable use of the space at the bottom of the fixed base 200.

[0059] The drive motor 421 is fixed on the fixed base 200. For example, the drive motor 421 is fixed at the bottom of the fixed base 200 and away from the tool changing mechanism 300. The output end of the drive motor 421 is driven and connected to the transmission belt 422.

[0060] Please refer to Figure 5 The following describes the transmission connection between the drive belt 422 and the mounting base 410, and how the rotation of the drive belt 422 is converted into the linear reciprocating movement of the mounting base 410. The drive belt 422 is connected to the sliding seat 412 via a connector 440. The drive belt 422 is used to drive the mounting base 410 and the tool changing mechanism 300 to slide relative to the fixed base 200. For example, the portion of the drive belt 422 closest to the sliding seat 412 is fixedly connected to the sliding seat 412 via the connector 440, and half the length of the drive belt 422 is approximately equal to the extension distance of the sliding seat 412. The drive belt 422 is used to drive the mounting base 410 and the tool changing mechanism 300 to slide relative to the fixed base 200.

[0061] In order to shorten the length of the transmission belt 422 as much as possible, reduce the space occupied by the transmission belt 422, and improve the utilization rate of converting the rotation of the transmission belt 422 into the linear reciprocating movement of the mounting base 410, the connecting member 440 is disposed at the end of the sliding base 412 away from the tool changing mechanism 300.

[0062] Please refer to Figure 5 The specific structure of the connector 440 is described below. The connector 440 includes a toothed plate 441, an adjusting block 442, and a pressing block 443. The toothed plate 441 is fixed on the transmission belt 422, and the toothed plate 441 is fixed on the sliding seat 412 by the pressing block 443.

[0063] To adjust the clamping force between the drive belt 422 and the sliding member 430, an adjusting block 442 is disposed between the pressure block 443 and the toothed plate 441. This adjusting block helps to adjust the clamping force between the drive belt 422 and the sliding member 430, thereby preventing disengagement between the drive belt 422 and the sliding member 430. In some other embodiments, the connecting member 440 can also be fixedly connected to the fixed base 200, and the adjusting block 442 is disposed between the pressure block 443 and the toothed plate 441 to adjust the clamping force between the drive belt 422 and the fixed base 200, preventing transmission disengagement between the drive belt 422 and the fixed base 200.

[0064] To facilitate the stable rotation of the transmission belt 422, the first drive component 420 also includes a drive gear 423 and a driven gear 424. The drive gear 423 and the driven gear 424 are a set, and there can be multiple sets of drive gears 423 and driven gears 424. Multiple drive gears 423 are connected by a transmission component, so that multiple drive gears 423 can be driven to rotate synchronously by a drive motor 421, saving the number of power sources.

[0065] Please refer to Figure 5 To facilitate the rotation and installation of the driving gear 423 and driven gear 424, the sliding support mechanism 400 further includes a first support base 450 and a second support base 460. The first support base 450 and the second support base 460 are detachably mounted on the bottom of the fixed base 200. The driving gear 423 is rotatably mounted within the first support base 450. Both the first support base 450 and the second support base 460 have opening slots to accommodate the driving gear 423 and driven gear 424, respectively. By adjusting the diameters of the driving gear 423 and driven gear 424, the length and height of the transmission belt 422 can be adjusted. For example, the larger the diameters of the driving gear 423 and driven gear 424, the shorter the length and the higher the height of the transmission belt 422 after it is fitted onto the driving gear 423 and driven gear 424. The travel distance of the mounting base 410 decreases as the length decreases, allowing for flexible adjustment according to actual conditions.

[0066] The drive gear 423 is connected to the output end of the drive motor 421. For example, the drive gear 423 and the drive motor 421 are coaxially arranged. The driven gear 424 is rotatably arranged in the second support 460. The transmission belt 422 is sleeved on the outer periphery of the drive gear 423 and the driven gear 424. The transmission belt 422 is a synchronous belt, which can ensure the accuracy of the movement of the tool changing mechanism 300.

[0067] Please refer to Figure 5In order to facilitate the adjustment of the tension of the transmission belt 422 connected to the driving gear 423 and the driven gear 424, the sliding support mechanism 400 further includes a tensioning mechanism 470. The tensioning mechanism 470 is disposed between the fixed seat 200 and the first support seat 450 or the second support seat 460, and is used to adjust the distance between the first support seat 450 and the second support seat 460.

[0068] The first support seat 450 or the second support seat 460 is detachably mounted on the fixed seat 200. The first support seat 450 has a fixed state and an movable state relative to the second support seat 460. When the first support seat 450 is in the movable state relative to the second support seat 460, the tensioning mechanism 470 is used to shorten or lengthen the distance between the first support seat 450 and the second support seat 460. Then, the first support seat 450 is adjusted to a fixed state relative to the second support seat 460 by fasteners, thereby adjusting the tension of the transmission belt 422.

[0069] Please refer to Figure 5 The tensioning mechanism 470 includes a positioning block 471 and a pulling member 472. The positioning block 471 is fixedly disposed at the bottom of the fixed base 200. The positioning block 471 is fixedly disposed close to the first support base 450 or the second support base 460 along the moving direction of the mounting base 410. The positioning block 471 is provided with a detachment-proof hole K along the moving direction of the mounting base 410. The pulling member 472 is inserted into the detachment-proof hole K and can rotate within the detachment-proof hole K. The pulling member 472 is also threadedly connected to the first support base 450 or the second support base 460. The tension of the transmission belt 422 is adjusted by adjusting the threaded depth of the pulling member 472 with the first support base 450 or the second support base 460. For example, the pulling member 472 can be a bolt. The first support 450 or the second support 460 is provided with a threaded hole along the first direction. The pulling member 472 is threadedly engaged with the threaded hole through the anti-loosening through hole K. It can be understood that when the pulling member 472 rotates, the pulling member 472 only rotates relative to the anti-loosening through hole K, without any forward or backward axial movement. Specifically, the pulling member 472 adjusts the tension of the transmission belt 422 by pulling the first support 450 or the second support 460 when it is in the disassembled state. After the adjustment is completed, the fasteners then re-fix the first support 450 or the second support 460 to the oblong hole of the fixing seat 200.

[0070] Please refer to Figure 2 and 3To prevent the sliding members 430 from being contaminated by cutting fluid and chips when the tool changing mechanism 300 extends, a telescopic cover 202 corresponding to the number of sliding members 430 is provided between the mounting base 410 and the fixed base 200. Each telescopic cover 202 covers a group of sliding members 430. The telescopic cover 202 can be an accordion cover, and the telescopic direction of the telescopic cover 202 is a first direction. And / or

[0071] Since the tool changing mechanism 300 is movable, if there is no limit during its movement, it is easy for the tool changing mechanism 300 to exceed its travel range, causing the tool holder 330 to collide with the jaw 110, damaging the tool holder 330 or the jaw 110. To avoid collision between the tool holder 330 and the jaw 110, the tool changing device also includes an anti-collision member 201, which is disposed between the mounting base 410 and the fixed base 200. When the mounting base 410 moves toward the fixed base 200, the contact between the mounting base 410 and the fixed base 200 via the anti-collision member 201 occurs earlier than the contact between the tool changing mechanism 300 and the jaw 110. For example, a collision protection element 201 is provided on the side of the fixed base 200 near the mounting base 410, and a collision protection element 201 is also provided on the side of the mounting base 410 near the fixed base 200. The collision protection element 201 can be in the shape of a block, and can be made of soft material. The collision protection element 201 includes anti-collision rubber and also has a buffering function to prevent the mounting base 410 from colliding with the fixed base 200 during movement.

[0072] Please refer to Figure 1 In order to enable multi-channel simultaneous processing on a single machine tool and increase the number of workpieces processed per unit time, the number of tool magazines 100 is at least two, and the number of tool changing mechanisms 300 is the same as the number of tool magazines 100.

[0073] Please refer to Figure 2To reduce the number of drive sources required to rotate the tool magazine 100 while ensuring multi-channel machining of the machine tool, the tool magazine 100 further includes a second drive unit 120, a reversing transmission mechanism 130 corresponding to the number of tool magazines 100, and a transmission shaft 140 disposed between any two of the reversing transmission mechanisms 130. The second drive unit 120, the reversing transmission mechanism 130, and the transmission shaft 140 are arranged in a straight line on the fixed base 200. The output end of the reversing transmission mechanism 130 is connected to the gripper 110 for transmission. The sides of two adjacent reversing transmission mechanisms 130 are connected by the transmission shaft 140. The second driving member 120 drives the gripper 110 of each tool magazine 100 to rotate synchronously through the reversing transmission mechanism 130 and the transmission shaft 140. The second driving member 120, the reversing transmission mechanism 130 and the transmission shaft 140 are arranged in a straight line on the fixed base 200, so that at least two tool magazines 100 can be driven to rotate synchronously by one second driving member 120, reducing the number of driving sources.

[0074] Please refer to Figure 2 The reversing transmission mechanism 130 includes a housing 131, a drive shaft 132, and a reversing component 133. The housing 131 is fixedly mounted on the fixed base 200 and is used to mount the drive shaft 132 and the reversing component 133. The housing 131 also supports the tool magazine 100. The reversing component 133 is used to convert horizontal rotation into vertical rotation, or vertical rotation into horizontal rotation. The drive shaft 132 is rotatably mounted above the housing 131 and is connected to the tool magazine 100. The reversing component 133 is rotatably mounted on the side of the housing 131 and is connected to both the drive shaft 132 and the second drive component 120, thus easily converting the rotation of the second drive component 120 along the width of the fixed base 200 into vertical rotation of the tool magazine 100.

[0075] The tool changing device of the above-mentioned machine tool is provided with a fixed base 200, a tool changing mechanism 300 and a sliding support mechanism 400. The tool changing mechanism 300 includes a tool changing arm 310, and the two ends of the tool changing arm 310 have clamping ports J for clamping the tool D. The sliding support mechanism 400 includes a mounting base 410 and a first driving member 420. The mounting base 410 is slidably disposed on the fixed base 200, and the tool changing arm 310 is rotatably disposed on the mounting base 410. The first driving member 420 is disposed between the fixed base 200 and the mounting base 410, and is used to drive the mounting base 410 to slide relative to the fixed base 200 so that the clamping port J moves closer to or away from the tool changing port H.

[0076] By moving the tool changing mechanism 300, the tool D to be replaced is moved between the spindle and the tool magazine 100. Compared with the existing scheme that pushes out the entire straight-line tool magazine, during tool changing, the tool changing device keeps the tool D that does not need to be replaced inside the tool magazine 100 and will not move below the spindle. This avoids the cutting fluid from easily contaminating the tool D that does not need to be replaced, protects the tool D that does not need to be replaced, and improves the service life of the tool magazine 100.

[0077] On the other hand, this embodiment also provides a machine tool, including a base, a column mounted on the base, and a spindle mounted on the column. The machine tool also includes the aforementioned tool changing device. The tool changing device's fixing seat 200 is fixedly mounted on the base or column, and the tool changing mechanism 300 cooperates with the spindle to perform tool changing. Since this machine tool includes the aforementioned tool changing device, it also has the corresponding technical effects of a tool changing device, which will not be elaborated further here.

[0078] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

[0079] The above-listed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A tool changing device for a machine tool, used in a tool magazine (100), the tool magazine (100) comprising grippers (110) for holding cutting tools (D) and a tool changing port (H) for changing tools, characterized in that, The tool changing device includes a fixed base (200), a tool changing mechanism (300), and a sliding support mechanism (400). The tool changing mechanism (300) includes a tool changing arm (310), and the two ends of the tool changing arm (310) have clamping ports (J) for clamping the tool (D). The sliding support mechanism (400) includes a mounting base (410) and a first driving member (420). The mounting base (410) is slidably disposed on the fixed base (200), and the tool changing arm (310) is rotatably disposed on the mounting base (410). The first driving member (420) is disposed between the fixed base (200) and the mounting base (410) and is used to drive the mounting base (410) to slide relative to the fixed base (200) so that the clamping port (J) moves closer to or away from the tool changing port (H).

2. The tool changing device as described in claim 1, characterized in that, The sliding support mechanism (400) further includes a slider (430), which is disposed between the bottom of the fixed base (200) and the mounting base (410). The mounting base (410) can reciprocate between a first position close to the fixed base (200) and a second position away from the fixed base (200) along a first direction via the slider (430). In the tool changing state of the tool changing mechanism (300), the tool changing arm (310) and the gripper (110) are arranged side by side along the first direction, and the clamping port (J) of the tool changing arm (310) faces the opening of the gripper (110) at the tool changing port (H).

3. The tool changing device as described in claim 2, characterized in that, The mounting base (410) includes a support (411) and a sliding base (412). The sliding member (430) includes a guide rail (432) and a slider (431). The slider (431) is fixedly disposed at the bottom of the fixed base (200), and the guide rail (432) is fixedly disposed on the sliding base (412). The first driving component (420) includes a driving motor (421) and a transmission belt (422). The driving motor (421) is fixed on the fixed base (200), and the output end of the driving motor (421) is drivenly connected to the transmission belt (422). The transmission belt (422) is connected to the sliding seat (412) through a connector (440), and the transmission belt (422) is used to drive the mounting base (410) and the tool changing mechanism (300) to slide relative to the fixed base (200).

4. The tool changing device as described in claim 3, characterized in that, The connecting member (440) is disposed at the end of the sliding seat (412) away from the tool changing mechanism (300); the connecting member (440) includes a toothed plate (441), an adjusting block (442), and a pressure block (443); the toothed plate (441) is fixed on the transmission belt (422), and the toothed plate (441) is fixed on the sliding seat (412) by the pressure block (443); the adjusting block (442) is disposed between the pressure block (443) and the toothed plate (441) for adjusting the clamping force between the transmission belt (422) and the sliding member (430); The number of guide rails (432), the number of transmission belts (422), and the number of sliding seats (412) are all at least two. Any two sliding seats (412) are spaced apart. Each sliding seat (412) is provided with one guide rail (432) and one transmission belt (422). Each transmission belt (422) is located inside the corresponding guide rail (432), and each transmission belt (422) is close to one guide rail (432).

5. The tool changing device as described in claim 3, characterized in that, The first driving member (420) further includes a driving gear (423) and a driven gear (424), and the sliding support mechanism (400) further includes a first support base (450) and a second support base (460); The first support base (450) and the second support base (460) are detachably disposed at the bottom of the fixed base (200). The driving gear (423) is rotatably disposed in the first support base (450). The driving gear (423) is connected to the output end of the drive motor (421). The driven gear (424) is rotatably disposed in the second support base (460). The transmission belt (422) is sleeved on the outer periphery of the driving gear (423) and the driven gear (424). The transmission belt (422) is a synchronous belt. The sliding support mechanism (400) further includes a tensioning mechanism (470), which is disposed between the fixed seat (200) and the first support seat (450) or the second support seat (460) for adjusting the distance between the first support seat (450) and the second support seat (460).

6. The tool changing device as described in claim 5, characterized in that, The tensioning mechanism (470) includes a positioning block (471) and a pulling member (472). The positioning block (471) is fixedly disposed at the bottom of the fixed base (200). The positioning block (471) is fixedly disposed close to the first support base (450) or the second support base (460) along the moving direction of the mounting base (410). The positioning block (471) is provided with a locking hole (K) along the moving direction of the mounting base (410). The pulling member (472) is inserted into the locking hole (K) and can rotate within the locking hole (K). The pulling member (472) is also threadedly connected to the first support base (450) or the second support base (460). The pulling member (472) is used to adjust the tension of the transmission belt (422) by adjusting the threaded depth with the first support base (450) or the second support base (460).

7. The tool changing device according to any one of claims 3-6, characterized in that, The support (411) of the mounting base (410) includes a side plate (4111) and a support plate (4112) disposed on the top of the side plate (4111), and the side plate (4111) is fixedly connected to the sliding seat (412). The tool changing mechanism (300) further includes a rotary cylinder (320) and a tool holder (330). The rotary cylinder (320) is mounted on the support plate (4112) and arranged side by side with the tool magazine (100). The tool changing arm (310) is mounted on the rotating shaft of the rotary cylinder (320), and tool holders (330) are fixedly mounted at both ends of the tool changing arm (310).

8. The tool changing device according to any one of claims 2-6, characterized in that, The tool changing device further includes a collision avoidance member (201), which is disposed between the mounting base (410) and the fixed base (200); when the mounting base (410) moves toward the fixed base (200), the mounting base (410) abuts against the fixed base (200) through the collision avoidance member (201) earlier than the abutment between the tool changing mechanism (300) and the gripper (110); A telescopic cover (202) corresponding to the number of sliding members (430) is provided between the mounting base (410) and the fixed base (200), and each telescopic cover (202) covers a group of sliding members (430).

9. The tool changing device according to any one of claims 1-6, characterized in that, The number of tool magazines (100) is at least two, and the number of tool changing mechanisms (300) is the same as the number of tool magazines (100). Each tool magazine (100) also includes a second drive member (120), a reversing transmission mechanism (130) corresponding to the number of tool magazines (100), and a transmission shaft (140) disposed between any two reversing transmission mechanisms (130). The second drive member (120), the reversing transmission mechanism (130), and the transmission shaft (140) are arranged in a straight line on the fixed base (200). The output end of the reversing transmission mechanism (130) is connected to the gripper (110) for transmission. The sides of two adjacent reversing transmission mechanisms (130) are connected for transmission through the transmission shaft (140). The second drive member (120) drives the gripper (110) of each tool magazine (100) to rotate synchronously through the reversing transmission mechanism (130) and the transmission shaft (140).

10. A machine tool, comprising a base, a column disposed on the base, and a spindle disposed on the column, characterized in that, It also includes a tool changing device as described in any one of claims 1-9, wherein the tool changing device has a fixed base (200) fixedly mounted on a base or column, and the tool changing device cooperates with the spindle to perform tool changing.

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