Motion platform and machining equipment

Abstract

The embodiment of the utility model relates to the technical field of machining equipment, and particularly discloses a motion platform and machining equipment, the motion platform comprises a platform, a base and at least three sets of driving assemblies, the at least three sets of driving assemblies are arranged between the platform and the base, and the at least three sets of driving assemblies are arranged in a triangular mode in the circumferential direction of the platform; each driving assembly comprises a driving part and a connector assembly, each connector assembly comprises a first universal connector and a second universal connector, the first universal connectors are connected with one ends of the driving parts and the platform, the second universal connectors are connected with the other ends of the driving parts and the base, and the driving parts drive the first universal connectors and the second universal connectors to move face to face or back to back. The at least three sets of driving assemblies are further matched to drive the platform to reciprocate in the first direction, the second direction and the third direction and rotate around the first shaft, the second shaft and the third shaft. The platform can move in six degrees of freedom through at least three groups of driving assemblies, the system structure is simplified, and the manufacturing cost and the maintenance difficulty are reduced.

Description

TECHNICAL FIELD

[0001] The embodiment of the utility model relates to processing equipment technical field, in particular to a kind of motion platform and processing equipment. BACKGROUND

[0002] In modern industrial production and scientific research field, motion platform as a kind of basic equipment is widely used in precision machining, assembly, detection and robot technology and many other aspects.Motion platform is usually used to carry and position workpiece, so as to carry out various machining, assembly and detection operations.At present, motion platform usually realizes translational motion in X, Y, Z axis direction through separate linear moving mechanism, or realizes rotational motion around X, Y, Z axis through separate rotating mechanism.

[0003] In the process of implementing the embodiments of the present application, the inventor found that when the motion platform realizes six-degree-of-freedom motion, it usually needs to combine one or more linear moving mechanisms and rotating mechanisms, which not only increases the complexity and cost of the system, but also makes it difficult to achieve high-precision, high-stability six-degree-of-freedom motion control due to the motion coupling and coordination problems between the mechanisms. UTILITY MODEL CONTENT

[0004] In view of the above problems, the embodiments of the utility model provide a kind of motion platform and processing equipment, overcome the above problems or at least partially solve the above problems.

[0005] To solve the above technical problems, one technical scheme adopted by the utility model is to provide a kind of motion platform, including platform, base and at least three groups of driving components, the base is oppositely arranged with the platform along first direction, the at least three groups of driving components are arranged between the platform and the base, the at least three groups of driving components are arranged in triangle along the circumference of the platform, each driving component includes driving piece and joint assembly, the joint assembly includes first universal joint and second universal joint, the first universal joint is connected with one end of driving piece and the platform respectively, the second universal joint is connected with the other end of driving piece and the base respectively, the driving piece is used to drive the first universal joint and the second universal joint to move towards or away from each other, wherein, the at least three groups of driving components can also cooperate with each other to drive the platform to reciprocate along the first direction, second direction and third direction and rotate around first axis, second axis and third axis, the first direction, the second direction and the third direction are perpendicular to each other, the first axis is parallel to the first direction, the second axis is parallel to the second direction, and the third axis is parallel to the third direction.

[0006] In some embodiments, each of the driving components has at least two driving members and at least two joint assemblies, one end of one of the driving members is connected to the platform through a first universal joint of one of the joint assemblies, and the other end of the driving member is connected to the base through a second universal joint of one of the joint assemblies.

[0007] In some embodiments, the driving member comprises a motor, a screw rod, and a sliding member, the screw rod is connected to the motor, the motor is configured to drive the screw rod to rotate, the sliding member is sleeved on the screw rod and is screwed with the screw rod, the sliding member is connected to the first universal joint, and the sliding member is configured to move along the screw rod to drive the first universal joint and the platform to move.

[0008] In some embodiments, the driving member further comprises a speed reducer, the speed reducer is connected to the motor, the screw rod is connected to an output shaft of the speed reducer, and the motor is configured to drive the speed reducer to rotate the screw rod.

[0009] In some embodiments, the driving member further comprises a housing, the housing is connected to the second universal joint, the housing is provided with a receiving cavity and a guide groove, the motor is arranged in the receiving cavity, the screw rod is at least partially arranged in the guide groove, the sliding member is slidingly connected to the housing, and the sliding member is at least partially arranged in the guide groove and is configured to slide along the guide groove.

[0010] In some embodiments, the first universal joint comprises a first rotating member and a second rotating member, the first rotating member and the second rotating member are rotationally connected, the first rotating member is fixed to one end of the driving member, and the second rotating member is rotationally connected to the platform, wherein a first rotation plane of the first rotating member relative to the second rotating member is perpendicular to a second rotation plane of the second rotating member relative to the platform.

[0011] In some embodiments, the second universal joint comprises a third rotating member and a fourth rotating member, the third rotating member and the fourth rotating member are rotationally connected, the third rotating member is fixed to the other end of the driving member, and the fourth rotating member is rotationally connected to the base, wherein a third rotation plane of the third rotating member relative to the fourth rotating member is perpendicular to a fourth rotation plane of the fourth rotating member relative to the base.

[0012] In some embodiments, the at least three groups of driving components are distributed in an equilateral triangle along the circumference of the platform.

[0013] In some embodiments, in the first direction, the projection area of the platform is smaller than the projection area of the base.

[0014] To solve the above technical problems, the utility model adopts another technical scheme, provide a kind of processing equipment, including above motion platform.

[0015] The beneficial effects of the utility model embodiment are as follows: different from the prior art, the utility model embodiment provides a motion platform and a processing equipment, the motion platform includes a platform, a base and at least three groups of driving assemblies, the base and the platform are oppositely arranged along a first direction, the at least three groups of driving assemblies are arranged between the platform and the base, the at least three groups of driving assemblies are arranged in a triangle along the circumference of the platform, each driving assembly includes a driving member and a joint assembly, the joint assembly includes a first universal joint and a second universal joint, the first universal joint is connected with one end of the driving member and the platform respectively, the second universal joint is connected with the other end of the driving member and the base respectively, and the driving member is used to drive the first universal joint and the second universal joint to move towards or away from each other, wherein the at least three groups of driving assemblies can also cooperate with each other to drive the platform to move along the first direction, the second direction and the third direction and rotate around the first shaft, the second shaft and the third shaft, the first direction, the second direction and the third direction are perpendicular to each other, the first shaft is parallel to the first direction, the second shaft is parallel to the second direction, and the third shaft is parallel to the third direction. The motion of the platform in six degrees of freedom is realized by the at least three groups of driving assemblies, without the need to combine multiple complex linear motion mechanisms and rotating mechanisms, so that the system structure is simplified, and the manufacturing cost and maintenance difficulty are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0016] To more clearly illustrate the technical scheme of the utility model embodiment, the following will briefly introduce the drawings needed to be used in the utility model embodiment, and obviously, the following described drawings are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to the drawings without creative labor.

[0017] Figure 1 It is a perspective view of the motion platform provided by the utility model embodiment;

[0018] Figure 2 It is an explosion view of the motion platform provided by the utility model embodiment;

[0019] Figure 3 It is a perspective view of the driving assembly provided by the utility model embodiment;

[0020] Figure 4 It is an explosion view of the driving assembly provided by the utility model embodiment;

[0021] Figure 5is a sectional view of the driving assembly in the first state according to an embodiment of the utility model;

[0022] Figure 6 is a sectional view of the driving assembly in the second state according to an embodiment of the utility model. DETAILED DESCRIPTION

[0023] In order to facilitate understanding of the utility model, the utility model will be explained in more detail below in conjunction with the drawings and specific embodiments.It needs to be explained that when an element is described as being "fixed to" another element, it can be directly on the other element or one or more intervening elements can be present therebetween.When an element is described as being "connected" to another element, it can be directly connected to the other element or one or more intervening elements can be present therebetween.The terms "vertical", "horizontal", "left", "right" and similar expressions used in the specification are only for the purpose of illustration.

[0024] Unless otherwise defined, all technical and scientific terms used in the specification are the same as the meanings commonly understood by those skilled in the art to which the utility model belongs.The terms used in the specification of the utility model are only for the purpose of describing specific embodiments and are not used to limit the utility model.The term "and / or" used in the specification includes any and all combinations of one or more related listed items.

[0025] Please refer to Figure 1 , the motion platform 1000 includes platform 1, base 2 and driving assembly 3, platform 1 and base 2 are oppositely arranged along the first direction z, driving assembly 3 is arranged between platform 1 and base 2, and driving assembly 3 is used to drive platform 1 to reciprocate along the first direction z, the second direction x and the third direction y and rotate around the first shaft, the second shaft and the third shaft. Among them, the first direction z, the second direction x and the third direction y are perpendicular to each other, the first shaft is parallel to the first direction z, the second shaft is parallel to the second direction x, and the third shaft is parallel to the third direction y.

[0026] For the above platform 1, please refer to Figure 2 , the surface of platform 1 away from base 2 is used to carry the workpiece to be processed or detected, or the processing device for processing. The side of platform 1 towards base 2 is provided with first mounting groove 11, and first mounting groove 11 is connected with driving assembly 3 to connect platform 1 with driving assembly 3.

[0027] For the above base 2, please refer to Figure 2 , the side of base 2 towards platform 1 is provided with second mounting groove 21, and second mounting groove 21 is connected with driving assembly 3 to connect base 2 with driving assembly 3.

[0028] In some embodiments, the projected area of the platform 1 is smaller than the projected area of the base 2 along the first direction z, so that the base 2 provides more stable support for the platform 1, enhancing the load-bearing capacity and stability of the motion platform 1000.

[0029] It can be understood that the shapes of the platform 1 and the base 2 can be rectangular, circular, oval, or other irregular shapes to adapt to the carrying needs of articles of different sizes and shapes. Preferably, the platform 1 and the base 2 are both circularly arranged.

[0030] For the above-mentioned driving assembly 3, please refer to Figure 3 , the driving assembly 3 includes a driving member 31 and a joint assembly 32, the joint assembly 32 includes a first universal joint 321 and a second universal joint 322, the first universal joint 321 is connected with one end of the reading plus and the platform 1 respectively, the second universal joint 322 is connected with the other end of the driving member 31 and the base 2 respectively, and the driving member 31 is used to drive the first universal joint 321 and the second universal joint 322 to move towards or away from each other.

[0031] Please refer to Figure 4 , the driving member 31 includes a motor 311, a speed reducer 312, a screw rod 313 and a sliding member 314, the speed reducer 312 is connected with the motor 311, the screw rod 313 is connected with the output shaft 3121 of the speed reducer 312, the sliding member 314 is sleeved on the screw rod 313, one end of the sliding member 314 is provided with a third mounting groove 3141, and the third mounting groove 3141 is connected with the first universal joint 321. The motor 311 is used to drive the speed reducer 312, and then the speed reducer 312 drives the screw rod 313 to rotate, at the same time, the sliding member 314 moves along the screw rod 313, and then drives the first universal joint 321 and the platform 1 to move. Through the speed reducer 312, not only the rotating speed of the motor 311 is reduced, but also the output torque is increased, so that the driving assembly 3 can more stably and accurately drive the platform 1 to move.

[0032] It can be understood that the movement of the sliding member 314 along the screw rod 313 can be realized by different thread cooperation modes. For example, in some embodiments, the screw rod 313 is provided with external threads, the through hole of the sliding member 314 sleeved on the screw rod 313 is provided with internal threads, the internal threads are threadedly matched with the external threads, so that the sliding member 314 can move along the axial direction of the screw rod 313 with the rotation of the screw rod 313; in another embodiment, the screw rod 313 is provided with external threads, the driving member 31 further includes a nut, the nut is sleeved on the screw rod 313, and the nut abuts against the sliding member 314, the nut is threadedly matched with the screw rod 313, when the screw rod 313 rotates, the nut moves along the axial direction of the screw rod 313 and drives the sliding member 314 to move, thereby realizing the movement of the sliding member 314 along the screw rod 313.

[0033] In some embodiments, please refer toFigures 4 to 6 , Figure 5 is a sectional view of the driving assembly 3 in the first state, Figure 6 is a sectional view of the driving assembly 3 in the second state. The driving member 31 further comprises a housing 315, one end of the housing 315 is provided with a fourth mounting slot 3151, the fourth mounting slot 3151 is connected with the second universal joint 322, the housing 315 is provided with a receiving cavity 3152 and a guide slot 3153, the motor 311 and the speed reducer 312 are arranged in the receiving cavity 3152, the screw rod 313 and the sliding member 314 are at least partially located in the guide slot 3153, and the sliding member 314 is in sliding connection with the housing 315. When the sliding member 314 moves along the screw rod 313, the sliding member 314 slides along the guide slot 3153, the guide slot 3153 limits and guides the movement of the sliding member 314, effectively reduces the risk of deviation or shaking of the sliding member 314 during movement, and further improves the precision and stability of the motion platform 1000.

[0034] It should be noted that the first state of the driving assembly 3 refers to that one end of the sliding member 314 away from the first universal joint 321 is located at the bottom of the guide slot 3153. The second state of the driving assembly 3 refers to that the distance between one end of the sliding member 314 away from the first universal joint 321 and the bottom of the guide slot 3153 is greater than that in the first state.

[0035] Please refer to Figure 4 and Figure 5 , the first universal joint 321 comprises a first rotating member 3211 and a second rotating member 3212, the first rotating member 3211 and the second rotating member 3212 are rotationally connected, the first rotating member 3211 is fixed to the third mounting slot 3141 to fix the first rotating member 3211 to one end of the driving member 31. The second rotating member 3212 is rotationally arranged in the first mounting slot 11 to rotationally connect the second rotating member 3212 with the platform 1. Among them, the first rotation plane of the first rotating member 3211 relative to the second rotating member 3212 is perpendicular to the second rotation plane of the second rotating member 3212 relative to the platform 1.

[0036] Please refer to Figure 4 and Figure 5 , the second universal joint 322 comprises a third rotating member 3221 and a fourth rotating member 3222, the third rotating member 3221 and the fourth rotating member 3222 are rotationally connected, the third rotating member 3221 is fixed to the fourth mounting slot 3151 to fix the third rotating member 3221 to the other end of the driving member 31. The fourth rotating member 3222 is rotationally arranged in the second mounting slot 21 to rotationally connect the fourth rotating member 3222 with the base 2. Among them, the third rotation plane of the third rotating member 3221 relative to the fourth rotating member 3222 is perpendicular to the fourth rotation plane of the fourth rotating member 3222 relative to the base 2.

[0037] It should be noted that the number of driving assemblies 3 is at least three groups, and each driving member 31 in the multiple driving assemblies 3 can drive the corresponding first universal joint 321 and the second universal joint 322 to move towards or away from each other, so as to realize the six-degree-of-freedom motion of the platform 1. Specifically, by controlling the rotation direction, speed and duration of the motor 311 in different driving assemblies 3, the translation distance of the platform 1 along the first direction z, the second direction x and the third direction y, and the rotation angle around the first axis, the second axis and the third axis can be accurately adjusted. For example, when the platform 1 needs to move along the first direction z, the motors 311 in one or more corresponding groups of driving assemblies 3 are controlled to rotate synchronously, the speed reducer 312 drives the screw 313 to rotate, and then the sliding member 314 moves along the screw 313, thereby pushing the platform 1 to move along the first direction z through the first universal joint 321. When the platform 1 needs to rotate around the first axis, by controlling the start sequence, rotation speed and duration of the motor 311 in different driving assemblies 3, the driving member 31 on one side of the platform 1 pushes the platform 1 to move upward by a distance greater than that of the driving member 31 on the other side, or the driving member 31 on one side remains stationary while the driving member 31 on the other side pushes the platform 1 to move, so that the platform 1 tilts relative to a horizontal plane, thereby rotating around the first axis.

[0038] In some embodiments, along the circumference of the platform 1, at least three groups of driving assemblies 3 are arranged in a triangular shape to form a stable support structure, ensuring the stability and accuracy of the platform 1 during the six-degree-of-freedom motion. Preferably, the at least three groups of driving assemblies 3 are distributed in an equilateral triangle along the circumference of the platform 1.

[0039] In some embodiments, the number of driving members 31 and the number of joint assemblies 32 in each driving assembly 3 are at least two, one end of a driving member 31 is connected to the platform 1 through the first universal joint 321 of a joint assembly 32, and the other end of the driving member 31 is connected to the base 2 through the second universal joint 322 of the joint assembly 32. Preferably, referring to Figure 2 , the number of driving assemblies 3 is three groups, and each driving assembly 3 includes two driving members 31 and two joint assemblies 32. In one driving assembly 3, the first universal joint 321 connected to one driving member 31 is arranged adjacent to the first universal joint 321 connected to the other driving member 31, and the second universal joint 322 connected to one driving member 31 is arranged apart from the second universal joint 322 connected to the other driving member 31, that is, the driving assemblies 3 are arranged in an equilateral triangle along the circumference of the platform 1 and in an equilateral triangle along the circumference of the base 2, and each two adjacent driving members 31 form a triangular structure with the platform 1 or the base 2, and the multiple triangular structures further enhance the stability of the motion platform 1000.

[0040] In the embodiment of the utility model, through setting at least three groups of drive assembly 3, and each drive assembly 3 includes drive piece 31 and joint assembly 32, drive piece 31 is connected with platform 1 and base 2 through joint assembly 32, realize the translation of platform 1 along x axis, y axis and z axis direction and the rotation around x axis, y axis and z axis, namely six degrees of freedom motion, not only simplify the structure of motion platform 1000, reduce the complexity of system, still effectively improved the motion precision and stability of platform 1.

[0041] The utility model further provides processing equipment embodiment, processing equipment includes above-mentioned motion platform 1000, for the structure and function of motion platform 1000 can refer to above-mentioned embodiment, here will not be elaborated one by one.

[0042] It should be noted that the specification and drawings of the utility model give the preferred embodiments of the utility model, but the utility model can be realized by many different forms, and is not limited to the embodiments described in the specification, and these embodiments are not as additional limitation to the content of the utility model, and the purpose of providing these embodiments is to make the understanding of the disclosure of the utility model more thorough and comprehensive. Furthermore, the above technical features continue to combine, form various embodiments not listed above, which are considered to be within the scope of the utility model specification; further, for those skilled in the art, the above description can be improved or changed, and all these improvements and changes should belong to the protection scope of the utility model claims.

Claims

1. A motion platform, characterized by The motion platform comprises: a platform; a base disposed opposite to the platform along a first direction; at least three groups of driving assemblies disposed between the platform and the base, the at least three groups of driving assemblies are arranged in a triangle along the circumference of the platform, each driving assembly comprises a driving member and a joint assembly, the joint assembly comprises a first universal joint and a second universal joint, the first universal joint is connected with one end of the driving member and the platform respectively, the second universal joint is connected with the other end of the driving member and the base respectively, the driving member is used to drive the first universal joint and the second universal joint to move towards or away from each other; wherein the at least three groups of driving assemblies can also cooperate with each other to drive the platform to move reciprocally along the first direction, the second direction and the third direction and rotate around the first axis, the second axis and the third axis, the first direction, the second direction and the third direction are perpendicular to each other, the first axis is parallel to the first direction, the second axis is parallel to the second direction, and the third axis is parallel to the third direction.

2. The motion platform according to claim 1, wherein the number of driving members and the number of joint assemblies of each driving assembly are at least two, one end of a driving member is connected with the platform through the first universal joint of a joint assembly, and the other end of the driving member is connected with the base through the second universal joint of the joint assembly.

3. The motion platform according to claim 2, wherein the driving member comprises a motor, a screw rod and a sliding member, the screw rod is connected with the motor, the motor is used to drive the screw rod to rotate, the sliding member is sleeved on the screw rod and is screwed with the screw rod, the sliding member is connected with the first universal joint, and the sliding member can move along the screw rod to drive the first universal joint and the platform to move.

4. The motion platform of claim 3, wherein , the driving member further comprises a speed reducer, the speed reducer is connected with the motor, the screw rod is connected with the output shaft of the speed reducer, the motor is used to drive the speed reducer, and then the speed reducer drives the screw rod to rotate.

5. The motion platform of claim 3, wherein , the driving member further comprises a housing, the housing is connected with the second universal joint, the housing is provided with a receiving cavity and a guide groove, the motor is arranged in the receiving cavity, and the screw rod is at least partially located in the guide groove, the sliding member is slidingly connected with the housing, the sliding member is at least partially located in the guide groove, and the sliding member can slide along the guide groove.

6. The motion platform according to claim 1, wherein the first universal joint comprises a first rotating member and a second rotating member, the first rotating member and the second rotating member are rotationally connected, the first rotating member is fixed with one end of the driving member, and the second rotating member is rotationally connected with the platform; wherein the first rotation plane of the first rotating member relative to the second rotating member is perpendicular to the second rotation plane of the second rotating member relative to the platform.

7. The motion platform according to claim 1, wherein The second universal joint comprises a third rotating member and a fourth rotating member, the third rotating member is rotatably connected with the fourth rotating member, the third rotating member is fixed with the other end of the driving member, and the fourth rotating member is rotatably connected with the base; The third rotating plane, on which the third rotating member rotates relative to the fourth rotating member, is perpendicular to the fourth rotating plane, on which the fourth rotating member rotates relative to the base.

8. The motion platform according to any one of claims 1-7, characterized in that, The at least three groups of driving assemblies are distributed in an equilateral triangle along the circumference of the platform.

9. The motion platform according to any one of claims 1-7, characterized in that, In the first direction, the projection area of the platform is smaller than the projection area of the base.

10. A processing apparatus characterized by comprising: The motion platform according to any one of claims 1-9.

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