Three-axis motion platform

Abstract

The utility model relates to the field of motion platforms, in particular to a three-axis motion platform which comprises a base, the upper end of the base is connected with a first motion platform, the upper end of the first motion platform is connected with a second motion platform perpendicular to the motion direction of the first motion platform, and the second motion platform is connected with a rotating platform. Windows are arranged on the first movement table and the second movement table, and connecting lines of all electrical components on the first movement table and the second movement table are gathered to a second abdicating groove through the windows and are connected with a serial port arranged on the side of the second abdicating groove. The multiple receding grooves with different depths are formed in the base, the first movement table, the second movement table and the like so as to install the driving device, the guide rail and other mechanisms, the small size of the movement platform is guaranteed, and meanwhile the using stability is greatly improved compared with using of a traditional thin plate.

Description

Technical Field

[0001] The utility model relates to the technical field of motion platforms, in particular to a three-axis motion platform. Background Art

[0002] In gene sequencing detection, the sample box needs to be moved slightly to achieve normal sequencing, and a high-precision and high-stability motion platform is usually used to achieve the action process. In the prior art, as the overall volume of the gene sequencer is designed to be smaller and smaller, the volume of the motion platform is also required to be more compact, and the traditional motion platform cannot be adapted; in addition, the motion accuracy requirements in the gene sequencer are relatively high, and in order to reduce the height of the motion platform in the prior art, a thin plate is used as a base or motion plate, which is prone to deformation after long-term use, resulting in dimensional deviation. Therefore, how to set the motion platform in the gene sequencer and ensure the stability of the motion is a problem that technicians in this field need to consider. Utility Model Content

[0003] The utility model aims to provide a three-axis motion platform to solve the problems of large size and low stability in use of the motion platform in the prior art.

[0004] The technical solution of the utility model is: a three-axis motion platform, including a base, the upper end of the base is connected to a first motion platform, the upper end of the first motion platform is connected to a second motion platform perpendicular to the motion direction of the first motion platform, and the second motion platform is connected to a rotating platform;

[0005] The base is provided with a first give way groove and a penetrating second give way groove, and the first give way groove is provided with a first driving device to drive the first moving platform to move; the first moving platform and the second moving platform are both provided with windows, and the connecting lines of all electrical components on the first moving platform and the second moving platform are gathered to the second give way groove through the windows, and connected to the serial port provided on the side of the second give way groove.

[0006] Preferably, a third clearance groove is provided on the base, a first grating sensor is connected in the third clearance groove, and the first grating sensor cooperates with a first grating ruler connected to the bottom of the first moving platform to detect the travel distance of the first moving platform.

[0007] Preferably, first guide rails are provided on both sides of the upper end of the base, and the first moving platform is connected to the first guide rails and can move along the first guide rails.

[0008] Preferably, the mover end of the first driving device is connected to a first sensing plate, and at least two first sensors are arranged on the first sensing plate on the movement path of the first driving device. By adjusting the positions of the two first sensors, the maximum stroke of the reciprocating motion of the first driving device can be limited.

[0009] Preferably, the first moving platform is provided with a fourth make way slot, a fifth make way slot and a sixth make way slot extending therethrough, the fourth make way slot is connected to a second driving device, and the second driving device can drive the second moving platform to move;

[0010] At least two second sensors are arranged in the fifth yielding groove, and the second sensors cooperate with the second sensing plate arranged at the bottom of the second moving platform. When the second moving platform moves, the second sensors sense the second sensing plate to confirm the maximum stroke;

[0011] A second grating sensor is arranged in the sixth yielding groove, and the second grating sensor cooperates with a second grating ruler arranged on the second moving platform to detect the travel distance of the second moving platform.

[0012] Preferably, both sides of the upper end of the first moving platform are connected to the second guide rails, and the lower end of the second moving platform is connected to the second guide rails, and it can move along the second guide rails.

[0013] Preferably, the rotating platform includes a third driving device arranged on the second moving platform, and a carrier connected to the third driving device, and the third driving device can drive the carrier to rotate;

[0014] A third sensing plate is connected to the carrier, and the third sensing plate cooperates with a third sensor connected to the second moving platform; at least two third sensors are provided, and when the third sensing plate rotates with the carrier, the third sensor can be sensed to limit the rotation stroke of the carrier.

[0015] Preferably, a third grating ruler is connected to the carrier, the third grating ruler is arc-shaped and its center coincides with the rotation center of the carrier; and a third grating sensor cooperating with the third grating ruler is arranged on the second moving platform.

[0016] Preferably, reflecting plates are embedded on the sides of the first moving platform and the second moving platform, and the reflecting plates correspond to interferometers respectively, and the moving distances of the first moving platform and the second moving platform can be measured respectively by the interferometers.

[0017] Compared with the prior art, the advantages of the utility model are:

[0018] (1) By opening a plurality of clearance grooves of different depths on the base, the first motion platform, and the second motion platform, etc., to install drive devices, guide rails and other mechanisms, while ensuring the smaller size of the motion platform, it is also equivalent to forming reinforcing ribs between the plurality of clearance grooves to avoid deformation caused by long-term use. Compared with the use of traditional thin plates, the stability of use is greatly increased, thereby ensuring the accuracy of gene sequencing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0020] Figure 1 This is a schematic diagram of the structure of the three-axis motion platform of the utility model;

[0021] Figure 2 It is a structural schematic diagram of the base of the utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the first sports platform of the utility model;

[0023] Figure 4 It is a structural schematic diagram of the second sports platform of the utility model;

[0024] Figure 5 It is a structural schematic diagram of the rotating platform of the utility model;

[0025] Figure 6 It is a structural schematic diagram of the carrier described in the utility model.

[0026] Wherein: base 1, first make way slot 11, second make way slot 12, first drive device 13, serial port 14, third make way slot 15, first grating sensor 16, first grating ruler 161, first guide rail 17, first induction plate 18, first inductor 19;

[0027] A first moving platform 2, a fourth make way slot 21, a fifth make way slot 22, a sixth make way slot 23, a second driving device 24, a second sensor 25, a second sensor plate 26, a second grating sensor 27, and a second guide rail 28;

[0028] Second sports station 3;

[0029] Rotating table 4, third driving device 41, carrier 42, third sensing plate 43, third sensor 44, third grating sensor 45, third grating ruler 451;

[0030] Interferometer 5, reflector 51

[0031] Window 6. DETAILED DESCRIPTION

[0032] The following is a further detailed description of the present invention in conjunction with specific embodiments:

[0033] The three-axis motion platform described in this application is mainly used in gene sequencer equipment. The sample box during gene sequencing is carried by the stage. During the gene detection process, the motion platform continuously performs X-axis, Y-axis and rotational motion on the sample box to perform all-round gene sequencing. Figure 1The three-axis motion platform shown includes a base 1, the upper end of the base 1 is connected to a first motion platform 2, the upper end of the first motion platform 2 is connected to a second motion platform 3 perpendicular to the motion direction of the first motion platform 2, and the second motion platform 3 is connected to a rotating platform 4.

[0034] like Figure 2 As shown, the base 1 is provided with a first clearance groove 11 and a second clearance groove 12 that penetrates through it. The first clearance groove 11 is provided with a first driving device 13 to drive the first moving platform 2 to move. The first moving platform 2 and the second moving platform 3 are both provided with windows 6. The connection lines of all electrical components on the first moving platform 2 and the second moving platform 3 are all collected through the windows to the second clearance groove 12 and connected to the serial port 14 provided on the side of the second clearance groove 12. The base 1 is provided with a third clearance groove 15. The third clearance groove 15 is connected with a first grating sensor 16. The first grating sensor 16 cooperates with a first grating ruler 161 connected to the bottom of the first moving platform 2 to detect the travel distance of the first moving platform 2. The first guide rails 17 are provided on both sides of the upper end of the base 1. The first moving platform 2 is connected to the first guide rails 17 and can move along the first guide rails 17. The mover end of the first driving device 13 is connected to a first sensing plate 18, and at least two first sensors 19 are arranged on the first sensing plate 18 along the movement path of the first driving device 13. By adjusting the positions of the two first sensors 19, the maximum stroke of the reciprocating motion of the first driving device 13 can be limited.

[0035] In this embodiment, the motion platform is a very precise component, and the requirements for internal wiring are high. It is necessary to avoid frequent friction with other structures caused by the movement of internal cables. On the one hand, the friction of the cables is easy to volatilize particles, which may cause pollution of the sample box. On the other hand, the wear of the cables or the generation of large friction will also affect the motion accuracy of the motion platform to a certain extent. In addition, it should be noted that the first sensor 19 adopts an electrical limit sensor. Of course, other limit forms can be selected according to actual needs in other embodiments; the positions of the two first sensors 19 are adjustable, which actually limits the maximum range of movement of the first motion platform 2. However, in actual movement, the movement of the first motion platform 2 may not reach the maximum stroke every time, and may also reciprocate in a small range less than the maximum stroke. The distance of movement can be confirmed by the detection of the first grating sensor 16 and the first grating ruler 161. The setting of the first give way slot 11, the second give way slot 12 and the third give way slot 15 can provide sufficient space for the group of other structures. At the same time, through the design of multiple give way slots, the internal stress on the base 1 is reduced. The side of the slot is also equivalent to the reinforcing rib to increase the strength, which greatly increases the stability of the base 1. The first driving device 13 may be a linear motor, and of course other driving mechanisms such as a servo motor may also be selected according to actual needs.

[0036] like Figure 3-Figure 4As shown, the first moving platform 2 is provided with a fourth give way slot 21, a fifth give way slot 22 and a sixth give way slot 23 that penetrates therethrough. The fourth give way slot 21 is connected to a second driving device 24, and the second driving device 24 can drive the second moving platform 3 to move. At least two second sensors 25 are provided in the fifth give way slot 22, and the second sensors 25 cooperate with a second sensing plate 26 provided at the bottom of the second moving platform 3. When the second moving platform 3 moves, the second sensor 25 senses the second sensing plate 26 to confirm the maximum stroke. The sixth give way slot 23 is provided with a second grating sensor 27, and the second grating sensor 27 cooperates with a second grating ruler 271 provided on the second moving platform 3 to detect the stroke distance of the second moving platform 3. Second guide rails 28 are connected to both sides of the upper end of the first moving platform 2, and the lower end of the second moving platform 3 is connected to the second guide rails 28, and it can move along the second guide rails 28.

[0037] In this embodiment, the fourth make way slot 21, the fifth make way slot 22 and the sixth make way slot 23 are all independent of each other, providing sufficient installation space for multiple structures on the first motion platform 2, and the protrusions formed between the slots also play a role in strengthening the overall strength. The second drive device 24 can adopt a linear motor, and of course other forms of drive mechanisms can be selected according to actual needs. The second sensor 25 adopts an electrical limit sensor, and of course other limit forms can be selected according to actual needs in other embodiments; when the second sensor 25 senses the second sensor plate 26, it means that the second motion platform 3 has moved to the set maximum stroke. However, in practice, it generally does not move to the maximum stroke. When it moves to the second sensor and is sensed, the second drive device stops running.

[0038] It should be noted that in order to further ensure the accuracy of the motion platform movement, reflective plates 51 are embedded on the sides of the first motion platform 2 and the second motion platform 3. The reflective plates 51 correspond to interferometers 5 respectively. The movement distances of the first motion platform 2 and the second motion platform 3 can be measured by the interferometers 5 respectively, thereby further correcting the motion accuracy of the motion platform.

[0039] like Figure 5-Figure 6As shown, the rotating platform 4 includes a third driving device 41 arranged on the second moving platform 3, and a carrier 42 connected to the third driving device 41, and the third driving device 41 can drive the carrier 42 to rotate. A third sensing plate 43 is connected to the carrier 42, and the third sensing plate 43 cooperates with a third sensor 44 connected to the second moving platform 3; at least two third sensors 44 are provided, and when the third sensing plate 43 rotates with the carrier 42, the third sensor 44 can be sensed to limit the rotation stroke of the carrier 42; the third sensor 44 adopts an electrical limit sensor, and of course, other limit forms can be selected according to actual needs in other embodiments; in addition, in actual operation, it generally does not move to the maximum stroke, and when it moves to the third sensor to be sensed, the third driving device stops running. A third grating ruler 451 is connected to the carrier 42, and the third grating ruler 451 is arc-shaped and its center coincides with the rotation center line of the carrier 42; a third grating sensor 45 cooperating with the third grating ruler 451 is provided on the second moving platform 3.

[0040] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with this technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, so it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the utility model.

Claims

1. A three-axis motion platform, characterized in that: It includes a base, the upper end of which is connected to a first moving platform, the upper end of which is connected to a second moving platform perpendicular to the moving direction of the first moving platform, and the second moving platform is connected to a rotating platform; The base is provided with a first give way groove and a penetrating second give way groove, and the first give way groove is provided with a first driving device to drive the first moving platform to move; the first moving platform and the second moving platform are both provided with windows, and the connecting lines of all electrical components on the first moving platform and the second moving platform are gathered to the second give way groove through the windows, and connected to the serial port provided on the side of the second give way groove.

2. A three-axis motion platform according to claim 1, characterized in that: The base is provided with a third clearance groove, in which a first grating sensor is connected. The first grating sensor cooperates with a first grating ruler connected to the bottom of the first moving platform to detect the travel distance of the first moving platform.

3. A three-axis motion platform according to claim 2, characterized in that: First guide rails are arranged on both sides of the upper end of the base, and the first moving platform is connected to the first guide rails and can move along the first guide rails.

4. A three-axis motion platform according to claim 1, characterized in that: The mover end of the first driving device is connected to a first induction plate, and at least two first induction plates are arranged on the movement path of the first driving device. The maximum reciprocating stroke of the first driving device can be limited by adjusting the positions of the two first induction plates.

5. A three-axis motion platform according to claim 1, characterized in that: The first moving platform is provided with a fourth make way slot, a fifth make way slot and a sixth make way slot extending therethrough, the fourth make way slot is connected to a second driving device, and the second driving device can drive the second moving platform to move; At least two second sensors are arranged in the fifth yielding groove, and the second sensors cooperate with the second sensing plate arranged at the bottom of the second moving platform. When the second moving platform moves, the second sensors sense the second sensing plate to confirm the maximum stroke; A second grating sensor is arranged in the sixth yielding groove, and the second grating sensor cooperates with a second grating ruler arranged on the second moving platform to detect the travel distance of the second moving platform.

6. A three-axis motion platform according to claim 1, characterized in that: The first moving platform is connected to second guide rails on both sides of its upper end, and the second moving platform is connected to the second guide rails at its lower end, and can move along the second guide rails.

7. A three-axis motion platform according to claim 1, characterized in that: The rotating platform includes a third driving device arranged on the second moving platform, and a carrier connected to the third driving device, and the third driving device can drive the carrier to rotate; A third sensing plate is connected to the carrier, and the third sensing plate cooperates with a third sensor connected to the second moving platform; at least two third sensors are provided, and when the third sensing plate rotates with the carrier, the third sensor can be sensed to limit the rotation stroke of the carrier.

8. A three-axis motion platform according to claim 7, characterized in that: The carrier is connected with a third grating ruler, which is arc-shaped and has its center coincident with the rotation center of the carrier; the second moving platform is provided with a third grating sensor matched with the third grating ruler.

9. The three-axis motion platform according to claim 1, characterized in that: Reflection plates are embedded on the sides of the first moving platform and the second moving platform. The reflection plates correspond to interferometers respectively, and the movement distances of the first moving platform and the second moving platform can be measured respectively by the interferometers.

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