Flexible servo motor double-drive gantry structure

Abstract

The utility model relates to the technical field of machine tool frames, and discloses a flexible servo motor double-drive gantry structure which comprises Y-axis modules and an X-axis module, the X-axis module is located between the two Y-axis modules, the two Y-axis modules are each provided with a driving assembly, the two driving assemblies are each provided with a sliding assembly, and the sliding assemblies are arranged on the two Y-axis modules. One end of the X-axis module is connected with one sliding assembly, and the other end of the X-axis module is connected with a mounting block arranged on the other sliding assembly through a connecting ball; the driving assembly and the sliding assembly are used for driving the X-axis module to horizontally move on the Y-axis module, and the connecting ball is arranged between the X-axis module and the mounting block, so that the mounting block can be allowed to deflect at a certain angle after being mounted, the error of a machining part can be compatible even if the machining precision is not enough during mounting of the mounting block, and the machining precision of the mounting block is improved. The application range of the mounting block is widened.

Description

Technical Field

[0001] This application relates to the technical field of machine tool frames, and particularly to a flexible servo motor dual-drive gantry structure. Background Art

[0002] At present, gantry motion platforms are structurally divided into rigid gantries and flexible gantries; a rigid gantry consists of two Y-axes and one X-axis; when the X-axis and Y-axis are connected, since they are both in rigid contact, the entire structure has high requirements for machining and installation, and it is necessary to ensure that the X-axis is perpendicular to the two Y-axes at the same time. At the same time, the control requirements for the gantry structure are also particularly high. During the movement of the X-axis, both ends need to move synchronously at the same time and ensure that the X-axis is always perpendicular to the two Y-axes. If the X-axis has a yaw in the Y direction, in the lightest case, the entire structure will run stuck and the friction will increase, and in the worst case, the structure will be stuck and deformed and scrapped.

[0003] The flexible gantry also consists of two Y-axes and one X-axis. In the existing flexible gantry, a spring structure is usually used at the connection between the X-axis and the Y-axis to allow a certain angle of yaw of the X-axis of the gantry structure in the Y direction, improving adaptability. At the same time, compared with the rigid gantry, the difficulty of machining and installation debugging is reduced, but the structure is more complex than the rigid gantry structure; since the movement of both ends of the X-axis is equivalent to two independent movements, it is more difficult to achieve unity and the control requirements are higher.

[0004] Therefore, there is an urgent need for a flexible servo motor dual-drive gantry structure with a simple structure and capable of achieving a certain angle of yaw to solve the technical problems.

[0005] The above content is only used to assist in understanding the technical solution of this application, and does not represent an admission that the above content is prior art. Summary of the Utility Model

[0006] The main purpose of this application is to provide a flexible servo motor dual-drive gantry structure, which integrates the advantages of rigid gantries and flexible gantries, and solves the problem that the existing gantry structures do not simultaneously have a simple structure and a wide range of applications.

[0007] To achieve the above object, this application provides a flexible servo motor dual-drive gantry structure, including a Y-axis module and an X-axis module. The X-axis module is arranged between the two Y-axis modules. Driving components are respectively arranged on the two Y-axis modules. Sliding components are respectively arranged on the two driving components. One end of the X-axis module is connected to one of the sliding components, and the other end of the X-axis module is connected to a mounting block arranged on the other sliding component through a connecting ball.

[0008] As a preferred solution of the present application, a placement groove is provided on the Y-axis module, the driving assembly is arranged in the placement groove, the driving assembly includes a first motor, a first lead screw and a guiding assembly, an output shaft of the first motor is connected to the first lead screw, the sliding assembly is arranged on the first lead screw, and the sliding assembly is slidably connected to the guiding assembly.

[0009] As a preferred solution of the present application, the sliding assembly includes a first guide rail and a slider, at least one of the first guide rails is arranged in the Y-axis module, the slider is arranged on the first guide rail, and the slider is connected to the mounting block.

[0010] As a preferred solution of the present application, a first groove is provided on one side of the X-axis module close to the mounting block, a second groove is provided on the mounting block, and the connecting ball is arranged between the first groove and the second groove.

[0011] As a preferred solution of the present application, a moving assembly is arranged on the X-axis module, the moving assembly includes a second motor, a second lead screw, a second guide rail and a mounting plate, an output shaft of the second motor is connected to the second lead screw, the mounting plate is arranged on the second lead screw, and the mounting plate is slidably connected to the second guide rail arranged on the X-axis module.

[0012] As a preferred solution of the present application, a driver is further included, two drivers are arranged on the two Y-axis modules, the two drivers are respectively connected to the two driving assemblies, and the two drivers can communicate with each other.

[0013] As a preferred solution of the present application, a through hole is provided on the connecting ball, a bolt is arranged between the mounting block and the X-axis module, and the bolt passes through the through hole and is connected to the X-axis module.

[0014] As a preferred solution of the present application, both the first groove and the second groove are V-shaped grooves.

[0015] A flexible servo motor dual-drive gantry structure provided by the present application drives the X-axis module to move horizontally on the Y-axis module by using the driving assembly and the sliding assembly. By arranging a connecting ball between the X-axis module and the mounting block, the mounting block can allow a certain angle of yaw after installation, meeting the requirement that even if there is insufficient machining accuracy during the installation of the mounting block, the machining error can be compensated, improving the application range of the mounting block. The entire gantry structure is simple in structure and does not require high-precision installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic three-dimensional structure diagram of a flexible servo motor dual-drive gantry structure in an embodiment of the present application;

[0017] Figure 2 This is the first cross-sectional view of a flexible servo motor dual-drive gantry structure in an embodiment of the present application;

[0018] Figure 3 This is an enlarged view of part A in a flexible servo motor dual-drive gantry structure in an embodiment of the present application;

[0019] Figure 4 This is the second cross-sectional view of a flexible servo motor dual-drive gantry structure in an embodiment of the present application;

[0020] Figure 5 This is an enlarged view of part B in a flexible servo motor dual-drive gantry structure in an embodiment of the present application.

[0021] Explanation of reference numerals:

[0022] 1. Y-axis module; 2. X-axis module; 3. Driving component; 4. Sliding component; 5. Connecting ball; 6. Mounting block; 7. Moving component;

[0023] 31. First motor; 32. First lead screw; 33. Guide component; 71. Second motor; 72. Second guide rail; 73. Mounting plate;

[0024] 331. First guide rail; 332. Slide block. Detailed implementation manners

[0025] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, but should not be construed as limiting the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts fall within the protection scope of the present application.

[0026] In addition, if the description in the present application involves "first", "second", etc., it is only for descriptive purposes (such as for distinguishing the same or similar elements), and cannot be understood as indicating or implying its relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between the various embodiments may be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present application.

[0027] Please refer to Figure 1 ,Figure 2 , Figure 3 , in one embodiment, a flexible servo motor dual-drive gantry structure provided by the present application includes a Y-axis module 1 and an X-axis module 2. The X-axis module 2 is arranged between the two Y-axis modules 1. Driving components 3 are respectively arranged on the two Y-axis modules 1, sliding components 4 are respectively arranged on the two driving components 3, one end of the X-axis module 2 is connected to one of the sliding components 4, and the other end of the X-axis module 2 is connected to a mounting block 6 arranged on the other sliding component 4 through a connecting ball 5.

[0028] It can be understood that in this embodiment, a flexible servo motor dual-drive gantry structure drives the X-axis module 2 to move horizontally on the Y-axis module 1 by using the driving component 3 and the sliding component 4. By arranging a connecting ball 5 between the X-axis module 2 and the mounting block 6, the mounting block 6 can allow a certain angle of yaw after installation, meeting the requirement that even if there is insufficient machining accuracy during the installation of the mounting block 6, the machining error can be compensated, improving the applicable range of the mounting block 6. The entire gantry structure is simple and does not require high-precision installation.

[0029] Specifically, please refer to Figure 1 , Figure 2 , on the basis of the above embodiment, a placement groove is formed on the Y-axis module 1, the driving component 3 is arranged in the placement groove, the driving component 3 includes a first motor 31, a first lead screw 32 and a guiding component 33. The output shaft of the first motor 31 is connected to the first lead screw 32, the sliding component 4 is arranged on the first lead screw 32, and the sliding component 4 is slidably connected to the guiding component 33. Preferably, the first motor 31 adopts a servo motor, and the movement of the X-axis module 2 is realized by using the high-precision control of the servo motor.

[0030] Specifically, please refer to Figure 2 , Figure 4 , Figure 5 , on the basis of the above embodiment, the sliding component 4 includes a first guide rail 331 and a slider 332. At least one first guide rail 331 is arranged in the Y-axis module 1, the slider 332 is arranged on the first guide rail 331, and the slider 332 is connected to the mounting block 6. By arranging the first guide rail 331 and the slider 332, the mounting block 6 and the X-axis module 2 can move along the direction of the guide rail.

[0031] Specifically, please refer to Figure 1 , Figure 2 , Figure 5 , on the basis of the above embodiment, a first groove is formed on the side of the X-axis module 2 close to the mounting block 6, a second groove is formed on the mounting block 6, and the connecting ball 5 is arranged between the first groove and the second groove; preferably, both the first groove and the second groove are V-shaped grooves.

[0032] Specifically, please refer toFigure 1 , Figure 3 , Figure 4 , on the basis of the above embodiment, a moving component 7 is provided on the X-axis module 2. The moving component 7 includes a second motor 71, a second lead screw, a second guide rail 72, and a mounting plate 73. The output shaft of the second motor 71 is connected to the second lead screw. A mounting plate 73 is provided on the second lead screw, and the mounting plate 73 is slidably connected to the second guide rail 72 provided on the X-axis module 2.

[0033] Specifically, please refer to Figure 1 , Figure 2 , on the basis of the above embodiment, a driver is further included. Two drivers are provided on the two Y-axis modules 1. The two drivers are respectively connected to the two driving components 3, and the two drivers can communicate with each other. It can be understood that the two drivers are respectively the main driver and the auxiliary driver. By using the two driving components 3 to be respectively connected to the two first motors 31, the communication between the main driver and the auxiliary driver ensures that the two drivers emit the same number of pulses, realizing the synchronous rotation of the two first motors 31, thereby realizing the high-precision movement of the X-axis module 2.

[0034] Specifically, please refer to Figure 3 , on the basis of the above embodiment, a through hole is provided on the connecting ball 5. A bolt is provided between the mounting block 6 and the X-axis module 2, and the bolt passes through the through hole and is connected to the X-axis module 2.

[0035] In summary, for a flexible servo motor dual-drive gantry structure, two connecting balls 5 with through holes opened at the central positions are provided at the connection between the X-axis module 2 and the mounting block 6, and the side of the mounting block 6 in contact with the connecting ball 5 is of a V-groove structure. During installation, a bolt is used to pass through the mounting block 6, the connecting ball 5 and then lock it with the X-axis module 2. Since the sphere contacts the V-shaped groove of the mounting block 6 with an arc surface, during locking, the mounting block 6 can rotate around the connecting ball 5 within a certain range, or it can be understood that it can rotate around the X-axis module 2 within a certain range; in this way, even if the machining accuracy of the mounting block 6 is insufficient during installation, the error in the machining part can be compatible, and at the same time, during installation, the entire X-axis module 2 can have a certain yaw relative to the Y-axis module 1. Therefore, there is no strict perpendicularity requirement for installation.

[0036] It should be noted that although the X-axis module 2 can yaw during movement, due to bolt locking, when the yawing force of the X-axis module 2 is very small, the entire X-axis module 2 will not yaw. Therefore, the entire gantry structure can drive a large load to move at high speed during movement; when the load is too large or a collision occurs, the X-axis module 2 will yaw. If the impact force is too large, the bolt will be damaged first and the accuracy of the entire X-axis module 2 structure will not be affected (if it is a rigid gantry, the X-axis module 2 will be deformed and scrapped after the collision). After replacing the bolt, it can still be used continuously.

[0037] Furthermore, due to the characteristics of its structure, the existing rigid gantry must adopt precise control methods to ensure the movement accuracy of the entire gantry structure, which requires a lot of money and time. However, the gantry structure provided in this application uses a cheaper and simpler control method to achieve the same effect. The specific operation is that the first motors 31 located on the two Y-axis modules 1 are controlled by two mutually communicating drivers; the two drivers are divided into a main driver and an auxiliary driver; the number of pulses sent by the main driver is followed by the auxiliary driver, and the feedback uses the feedback of the servo motor and the driver itself. Since the gantry structure provided in this application can withstand a certain amount of yaw and is also compatible with the overall rigidity during movement, such a control method can be adopted. To achieve the same movement accuracy, the existing gantry structure needs to additionally add a magnetic grating for Y-axis position feedback.

[0038] In summary, a flexible servo motor dual-drive gantry structure achieves high movement accuracy while reducing the machining accuracy, assembly accuracy, and control requirements of the workpiece (mounting block 6) in the precision gantry; it solves the problem that the existing rigid gantry structure has high requirements for the machining accuracy and installation accuracy of the workpiece. At the same time, it also has the advantage that the flexible gantry X-axis module 2 can be compatible with a certain amount of distortion in the Y direction, and it solves the problem that the flexible gantry cannot bear too much load.

[0039] It should be noted that in this article, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, device, article or method including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, device, article or method. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of another identical element in the process, device, article or method including that element.

[0040] The above are only the preferred embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present application.

Claims

1. A flexible servo motor dual-drive gantry structure, characterized in that: It includes a Y-axis module and an X-axis module, the X-axis module is arranged between the two Y-axis modules, the two Y-axis modules are respectively provided with a driving component, the two driving components are respectively provided with a sliding component, one end of the X-axis module is connected to one of the sliding components, and the other end of the X-axis module is connected to a mounting block arranged on the other sliding component through a connecting ball.

2. A flexible servo motor dual-drive gantry structure according to claim 1, characterized in that: The Y-axis module is provided with a placement groove, the driving assembly is arranged in the placement groove, the driving assembly includes a first motor, a first screw rod and a guide assembly, the output shaft of the first motor is connected to the first screw rod, the sliding assembly is arranged on the first screw rod, and the sliding assembly is slidably connected to the guide assembly.

3. A flexible servo motor dual-drive gantry structure according to claim 1, characterized in that: The sliding assembly includes a first guide rail and a slider. At least one first guide rail is provided in the Y-axis module. The slider is provided on the first guide rail, and the slider is connected to the mounting block.

4. The flexible servo motor dual-drive gantry structure according to claim 1, characterized in that: A first groove is formed on a side of the X-axis module close to the mounting block, a second groove is formed on the mounting block, and the connecting ball is arranged between the first groove and the second groove.

5. The flexible servo motor dual-drive gantry structure according to claim 1, characterized in that: The X-axis module is provided with a moving component, which includes a second motor, a second screw rod, a second guide rail and a mounting plate. The output shaft of the second motor is connected to the second screw rod, the second screw rod is provided with the mounting plate, and the mounting plate is slidably connected to the second guide rail provided on the X-axis module.

6. The flexible servo motor dual-drive gantry structure according to claim 1, characterized in that: It also includes a driver. Two of the drivers are arranged on the two Y-axis modules. The two drivers are respectively connected to the two driving components, and the two drivers can communicate with each other.

7. The flexible servo motor dual-drive gantry structure according to claim 4, characterized in that: A through hole is provided on the connecting ball, a bolt is provided between the mounting block and the X-axis module, and the bolt passes through the through hole and is connected to the X-axis module.

8. The flexible servo motor dual-drive gantry structure according to claim 4, characterized in that: The first groove and the second groove are both V-shaped grooves.

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