A new oil pressure tool changing mechanism

Abstract

The utility model provides a novel oil pressure tool changing mechanism relates to machining center tool magazine technical field, including drive end and install on the drive end tool changing end, the drive end includes the turnover box, install in the turnover box top oil cylinder, be located in the inside of turnover box with piston rod connection's rack and be installed in the front of turnover box and with the gear wheel rotation oil cylinder of rack meshing drive, the tool changing end includes with the output shaft connection of gear wheel rotation oil cylinder's sword arm rotation axle cylinder, install on the sword arm rotation axle cylinder sword arm and be located respectively first sword claw and second sword claw in sword arm both sides, under the same volume, hydraulic system can provide huge thrust and torque, this is very favorable to the capture, pull -out of large -scale, heavy -duty tool, the action is vigorous and powerful, and the reliability is high.

Description

Technical Field

[0001] This utility model relates to the field of tool magazine technology for machining centers, and in particular to a novel hydraulic tool changing mechanism. Background Technology

[0002] With the rapid development of CNC machine tool technology, the tool magazine, as a key component, has seen significant improvements in performance and functionality.

[0003] While current tool changer mechanisms can meet certain requirements for high precision, high efficiency, high reliability, and multitasking, they still have some shortcomings in practical applications: First, traditional tool changer mechanisms require a 360-degree rotation to complete the tool change operation, which is not only time-consuming but also increases the complexity of the equipment and the cumbersomeness of debugging; second, the high precision requirements for parts increase the manufacturing cost and assembly difficulty of the equipment, which also means that more refined machining processes and higher error control standards are needed; third, for some heavy-duty tools, the existing tool changer mechanisms have insufficient load-bearing capacity, which may lead to instability during the tool change process, or even generate noise, affecting the machine's operating quality and service life. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a novel hydraulic tool changing mechanism. This mechanism aims to solve the problems of insufficient torque, inadequate tool load capacity, complex component structure, and high precision requirements of the original mechanism.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A novel hydraulic tool changing mechanism includes a drive end and a tool changing end mounted on the drive end. The drive end includes a tilting housing, a hydraulic cylinder mounted on the top of the tilting housing, a rack located inside the tilting housing and connected to the piston rod of the hydraulic cylinder, and a gear rotary hydraulic cylinder mounted on the front of the tilting housing and meshing with the rack.

[0007] The tool changing end includes a tool arm rotating shaft cylinder connected to the output shaft of the gear rotating cylinder, a tool arm mounted on the tool arm rotating shaft cylinder, and a first cutting claw and a second cutting claw respectively disposed on both sides of the tool arm.

[0008] The output shaft of the gear rotary cylinder passes through the cutter arm and the cutter arm rotating shaft in sequence, and is locked and fixed by the shaft cover and the locking nut.

[0009] Furthermore, it also includes a positioning bracket and a positioning shaft mounted on the positioning bracket. The positioning bracket is fixed to the side of the rotating shaft sealing cover by bolts, and the rotating shaft sealing cover is mounted on the flip box.

[0010] Furthermore, a shock-absorbing pad is provided between the hydraulic cylinder and the tilting box, and they are connected by bolts; the rack and the piston rod of the hydraulic cylinder are connected by a key.

[0011] Furthermore, it also includes an oil circuit adapter block located on the top of the tilting box, the oil circuit adapter block being connected to the oil cylinder via an oil circuit pipeline; a sealing ring is provided between the oil circuit adapter block and the tilting box, and the oil circuit pipeline is connected to the oil circuit adapter block via a compression fitting.

[0012] Furthermore, a bearing is provided between the cutter arm and the cutter arm rotating shaft, and the cutter arm is rotatably mounted on the cutter arm rotating shaft via the bearing.

[0013] Furthermore, the first and second cutting claws are respectively bolted into the cutting claw grooves on both sides of the cutting arm.

[0014] Furthermore, the shaft cover is sleeved on the output shaft of the gear rotary cylinder and abuts against the tool arm rotary cylinder, and the locking nut is threaded to the end of the output shaft to press the shaft cover.

[0015] Furthermore, the cylinder is connected to an external hydraulic system and its operation is controlled by a solenoid valve; the cylinder is equipped with a magnetic ring switch for detecting the piston rod position signal; the gear rotary cylinder drives the cutter arm to rotate and move axially under the drive of the rack, thereby realizing the tool changing action.

[0016] Furthermore, a back cover is installed on the back of the flip-up box.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. High output power and strong driving force;

[0019] Advantages: Within the same volume, the hydraulic system can provide huge thrust and torque; this is very advantageous for gripping and inserting large and heavy tools (such as on large gantry milling machines and floor-type boring machines), with strong and powerful movements and high reliability;

[0020] In comparison, to achieve the same torque, a motor drive typically requires a larger servo motor and a more complex reduction gear mechanism, which increases the size and cost.

[0021] 2. High power density and relatively compact structure;

[0022] Advantages: Hydraulic actuators (such as cylinders) are small in size but can output a lot of force; this allows for the arrangement of tool changer arms in a limited space, and the overall structure can be designed to be more compact.

[0023] In contrast, high-power motors and their associated transmission mechanisms are usually more space-consuming and bulky.

[0024] 3. Stable movement and strong impact resistance;

[0025] Advantages: Hydraulic oil itself has vibration absorption and buffering effects, making tool changing operations (especially the rotation and tool insertion / removal operations of the robot arm) very smooth and shock-free, and providing good protection for the tool and spindle taper hole;

[0026] In contrast, while motor drives can achieve smooth operation through servo control, the rigidity and impact of their transmission components (such as gears and cams) require more refined design when handling extremely heavy loads.

[0027] 4. Mature technology and controllable costs;

[0028] Advantages: For traditional machine tool manufacturers, hydraulic technology is very mature. In scenarios requiring high power output, the initial manufacturing cost of a hydraulic system is lower than that of a servo system with equivalent performance. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of a novel hydraulic tool changing mechanism provided by this utility model.

[0030] Legend: 1. Positioning shaft; 2. Positioning bracket; 3. Tilting housing; 4. Rear cover; 5. Oil circuit adapter block; 6. Oil circuit pipeline; 7. Oil cylinder; 8. Rack; 9. Rotating shaft sealing cover; 10. Gear rotating cylinder; 11. Cutter arm; 12. First cutter claw; 13. Cutter arm rotating shaft cylinder; 14. Locking nut; 15. Shaft cover; 16. Second cutter claw. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0032] To facilitate understanding of this utility model, a more comprehensive description of this utility model will be provided below with reference to relevant embodiments, and several embodiments of this utility model will be given. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of this utility model more thorough and complete.

[0033] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on 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," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0034] 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 invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0035] Example 1

[0036] like Figure 1 As shown, this utility model provides a technical solution: a novel hydraulic tool changing mechanism, including a drive end and a tool changing end mounted on the drive end;

[0037] The drive end includes a tilting housing 3, a hydraulic cylinder 7 mounted on the top of the tilting housing 3, a rack 8 located inside the tilting housing 3 and connected to the piston rod of the hydraulic cylinder 7, and a gear rotary hydraulic cylinder 10 mounted on the front of the tilting housing 3 and meshing with the rack 8; the tool changing end includes a tool arm rotary cylinder 13 connected to the output shaft of the gear rotary cylinder 10, a tool arm 11 mounted on the tool arm rotary cylinder 13, and a first cutting claw 12 and a second cutting claw 16 respectively located on both sides of the tool arm 11; the output shaft of the gear rotary cylinder 10 passes through the tool arm 11 and the tool arm rotary cylinder 13 in sequence, and is locked and fixed by a shaft cover 15 and a locking nut 14; a rear cover 4 is installed on the back of the tilting housing 3 to close the internal structure of the housing.

[0038] Example 2

[0039] Based on Embodiment 1, this embodiment further includes a positioning bracket 2 and a positioning shaft 1 mounted on the positioning bracket 2. The positioning bracket 2 is fixed to the side of the rotating shaft sealing cover 9 by bolts. The rotating shaft sealing cover 9 is mounted on the flip box 3 to ensure the accurate positioning of the entire tool changing mechanism on the machine tool.

[0040] A shock-absorbing pad is provided between the hydraulic cylinder 7 and the tilting box 3, and they are connected by bolts to effectively reduce vibration during operation; the rack 8 and the piston rod of the hydraulic cylinder 7 are connected by a key to ensure accurate and reliable transmission.

[0041] It also includes an oil circuit adapter block 5 located on the top of the tilting box 3. The oil circuit adapter block 5 is connected to the oil cylinder 7 through the oil circuit pipe 6. A sealing ring is provided between the oil circuit adapter block 5 and the tilting box 3. The oil circuit pipe 6 and the oil circuit adapter block 5 are connected through a compression fitting to ensure the sealing of the hydraulic system.

[0042] A bearing is provided between the cutter arm 11 and the cutter arm rotating shaft cylinder 13, allowing the cutter arm 11 to rotate flexibly. The first cutter claw 12 and the second cutter claw 16 are respectively installed in the cutter claw grooves on both sides of the cutter arm 11 by bolts, which makes the structure stable and easy to adjust.

[0043] The shaft cover 15 is sleeved on the output shaft of the gear rotary cylinder 10 and abuts against the tool arm rotary cylinder 13. The locking nut 14 is threaded to the end of the output shaft to press the shaft cover 15 and prevent it from loosening.

[0044] The hydraulic cylinder 7 is connected to an external hydraulic system and its movement is controlled by a solenoid valve; the hydraulic cylinder 7 is equipped with a magnetic ring switch to detect the piston rod position signal and achieve precise control of the movement.

[0045] The working process of this utility model is as follows: When using this novel hydraulic tool changing mechanism, the solenoid valve is first activated by the external hydraulic system, driving the piston rod of the hydraulic cylinder 7 to extend and push the rack 8 to move linearly. The rack 8 drives the gear-rotating hydraulic cylinder 10, which in turn drives the tool arm 11 to rotate to the tool changing position via the output shaft. The magnetic ring switch detects the position of the piston rod of the hydraulic cylinder 7 in real time and sends a feedback signal to the control system. When the tool arm 11 is in position, the hydraulic cylinder 7 continues to move, driving the tool arm 11 to move axially via the gear-rotating hydraulic cylinder 10, so that the first pawl 12 or the second pawl 16 accurately grasps the tool on the machine tool spindle or the tool magazine. After the grasping is completed, the hydraulic cylinder 7 moves in the opposite direction, and the tool arm 11 drives the tool to retract and rotate to the target position, realizing the installation or exchange of tools. The entire tool changing process is hydraulically driven, with smooth operation and accurate positioning, effectively improving the automation level and processing efficiency of the machine tool.

[0046] In summary, the hydraulic tool changing mechanism of this utility model is applied to a chain tool magazine. Compared with the original tool changing mechanism, this hydraulic tool changing mechanism improves the compatibility of the tool arm, has better operational stability, larger load capacity, occupies less space, and reduces the difficulty of installation and debugging.

[0047] Meanwhile, the structure is simple in size, easy to assemble and disassemble, and convenient for maintenance, which can effectively improve product quality and reduce product costs.

[0048] High power: Hydraulic transmission can provide tremendous thrust and torque, making it ideal for changing heavy-duty tools.

[0049] Smooth operation: Stepless speed regulation and buffering can be easily achieved through the speed regulating valve, resulting in minimal impact.

[0050] High reliability: Mature technology, durable components, and stable performance in harsh workshop environments.

[0051] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel hydraulic tool changer mechanism, comprising a drive end and a tool changer end mounted on the drive end, characterized in that: The drive end includes a tilting box (3), an oil cylinder (7) installed on the top of the tilting box (3), a rack (8) located inside the tilting box (3) and connected to the piston rod of the oil cylinder (7), and a gear rotating oil cylinder (10) installed on the front of the tilting box (3) and meshing with the rack (8). The tool changing end includes a tool arm rotating shaft cylinder (13) connected to the output shaft of the gear rotating cylinder (10), a tool arm (11) mounted on the tool arm rotating shaft cylinder (13), and a first cutting claw (12) and a second cutting claw (16) respectively provided on both sides of the tool arm (11); The output shaft of the gear rotary cylinder (10) passes through the cutter arm (11) and the cutter arm rotary cylinder (13) in sequence, and is locked and fixed by the shaft cover (15) and the locking nut (14).

2. The novel hydraulic tool changing mechanism according to claim 1, characterized in that: It also includes a positioning bracket (2) and a positioning shaft (1) mounted on the positioning bracket (2). The positioning bracket (2) is fixed to the side of the rotating shaft sealing cover (9) by bolts. The rotating shaft sealing cover (9) is mounted on the flip box (3).

3. The novel hydraulic tool changing mechanism according to claim 1, characterized in that: The hydraulic cylinder (7) and the tilting box (3) are provided with shock-absorbing pads and are connected by bolts; the rack (8) and the piston rod of the hydraulic cylinder (7) are connected by a key.

4. The novel hydraulic tool changing mechanism according to claim 1, characterized in that: It also includes an oil circuit adapter block (5) located on the top of the tilting box (3), the oil circuit adapter block (5) being connected to the oil cylinder (7) via an oil circuit pipe (6); a sealing ring is provided between the oil circuit adapter block (5) and the tilting box (3), and the oil circuit pipe (6) and the oil circuit adapter block (5) are connected via a compression fitting.

5. The novel hydraulic tool changing mechanism according to claim 1, characterized in that: A bearing is provided between the cutter arm (11) and the cutter arm rotating shaft (13), and the cutter arm (11) is rotatably mounted on the cutter arm rotating shaft (13) through the bearing.

6. The novel hydraulic tool changing mechanism according to claim 1, characterized in that: The first cutting claw (12) and the second cutting claw (16) are respectively installed in the cutting claw grooves on both sides of the cutting arm (11) by bolts.

7. The novel hydraulic tool changing mechanism according to claim 1, characterized in that: The shaft cover (15) is sleeved on the output shaft of the gear rotary cylinder (10) and abuts against the knife arm rotary cylinder (13). The locking nut (14) is threaded to the end of the output shaft to press the shaft cover (15).

8. The novel hydraulic tool changing mechanism according to claim 1, characterized in that: The cylinder (7) is connected to an external hydraulic system and its operation is controlled by a solenoid valve; the cylinder (7) is equipped with a magnetic ring switch for detecting the position signal of the piston rod; the gear rotary cylinder (10) drives the cutter arm (11) to rotate and move axially under the drive of the rack (8) to realize the tool changing action.

9. The novel hydraulic tool changing mechanism according to claim 1, characterized in that: The back cover (4) is installed on the back of the flip-top box (3).

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