Alignment platform

Abstract

An alignment platform comprises a carrying platform, a first driving mechanism and a second driving mechanism. The object carrying platform is fixedly connected with a gear, and the gear and the object carrying platform are arranged in parallel. The first driving mechanism is used for driving the carrying platform to rotate and / or move in the first direction, the first driving mechanism comprises two first voice coil motors which are arranged in a spaced mode, the driving directions of the two first voice coil motors are parallel to each other, the two first voice coil motors are each in driving connection with a rack, and the two racks are both meshed with the gear; the second driving mechanism is used for driving the carrying platform to move in the second direction, the second direction is perpendicular to the first direction, the second driving mechanism comprises a second voice coil motor, the second voice coil motor is in driving connection with a connecting rod, and the connecting rod can drive the first driving mechanism and the carrying platform to move synchronously in the moving process. The utility model provides an alignment platform which is simple in structure, strong in stability, simple in control process and higher in control precision.

Description

Technical Field

[0001] The utility model relates to the technical field of alignment platforms, and specifically relates to an alignment platform. Background Art

[0002] During the industrial production process, it is often necessary to place the workpiece to be processed at a specific reference position, and this behavior is called alignment. Generally, the alignment system mainly adopts a special alignment platform to carry the workpiece, and realizes the alignment of the workpiece through the movement of the alignment platform, so as to maintain the workpiece and the automated production line in a relatively stable state, reduce the degree of freedom of the workpiece, and improve the production efficiency of the production line.

[0003] Among the existing alignment platforms, generally, a driving structure of a servo motor plus a ball screw is adopted to realize the movement of the alignment platform. Although this method can ensure extremely high alignment accuracy, there are also deficiencies. The main problem is that the ball screw will cause relatively serious wear after long-term work, and it is easy to heat up, resulting in a decrease in control accuracy. Moreover, the ball screw requires high manufacturing accuracy during manufacturing, and the processing cost is relatively high. Content of the Utility Model

[0004] In order to solve the deficiencies in the prior art, the utility model provides an alignment platform, which has a simple structure, strong stability, and a simple control process and higher control accuracy.

[0005] In order to achieve the above purpose, the specific solution adopted by the utility model is as follows: an alignment platform, which includes a load platform, a first driving mechanism, and a second driving mechanism;

[0006] The load platform is fixedly connected with a gear, and the gear is arranged parallel to the load platform;

[0007] The first driving mechanism is used to drive the load platform to rotate and / or move along a first direction. The first driving mechanism includes two first voice coil motors arranged at intervals, the driving directions of the two first voice coil motors are parallel to each other, each of the two first voice coil motors is drivingly connected with a rack, and both racks are engaged with the gear;

[0008] The second driving mechanism is used to drive the load platform to move along a second direction, and the second direction is perpendicular to the first direction. The second driving mechanism includes a second voice coil motor, and the second voice coil motor is drivingly connected with a connecting rod. During the movement of the connecting rod, it can drive the first driving mechanism and the load platform to move synchronously.

[0009] As a further optimization of the above-mentioned alignment platform: the alignment platform further includes a bottom plate, the second driving mechanism is fixedly arranged on the bottom plate, at least one guide rail extending along the second direction is fixedly arranged on the bottom plate, a moving support plate is slidably arranged on the guide rail, the first driving mechanism is fixedly arranged on the moving support plate, and the gear is movably connected to the moving support plate.

[0010] As a further optimization of the above-mentioned alignment platform: a reinforcing bearing for supporting the gear is slidably arranged on the moving support plate, the reinforcing bearing includes an upper bearing cover and a lower bearing cover arranged up and down, and a plurality of rollers are arranged between the upper bearing cover and the lower bearing cover, wherein the upper bearing cover is fixedly connected to the gear through a plurality of connecting bolts.

[0011] As a further optimization of the above-mentioned alignment platform: a central shaft is commonly penetrated through the upper bearing cover and the lower bearing cover, one end of the central shaft extends above the upper bearing cover and is fixedly sleeved with a thrust bearing, and the thrust bearing is used to press the upper bearing cover.

[0012] As a further optimization of the above-mentioned alignment platform: a cylindrical bearing member is vertically and fixedly arranged on the upper bearing cover, the upper end of the bearing member is closed and fixedly connected with a connecting shaft, and the gear is fixedly sleeved on the connecting shaft.

[0013] As a further optimization of the above-mentioned alignment platform: the lower end of the bearing member is fixedly connected to the upper bearing cover through a plurality of fastening bolts evenly distributed along the circumferential direction.

[0014] As a further optimization of the above-mentioned alignment platform: two slide rails extending along the first direction are fixedly arranged on the bottom plate, two sliding grooves extending along the length direction are formed in the slide rails, and the two sliding grooves are distributed up and down, and the upper bearing cover and the lower bearing cover correspondingly extend into the two sliding grooves.

[0015] As a further optimization of the above-mentioned alignment platform: the connecting rod is fixedly connected to the moving support plate.

[0016] As a further optimization of the above-mentioned alignment platform: the two racks are symmetrically arranged about the axis of the gear, and the orientations of the two first voice coil motors are opposite.

[0017] Beneficial effects: The utility model uses a driving mechanism based on a voice coil motor to drive the load platform to move, without the need to cooperate with a commutation structure, has a fast response speed, a simple control process, and adopts a transmission method of a rack cooperating with a gear, is not prone to heat generation during the action process, will not cause a decrease in control accuracy due to too high temperature, and has a lower cost; the utility model uses two first driving mechanisms to drive the load platform to move and rotate, has a higher control accuracy, and reduces the types of objects to be controlled, and can further simplify the control process. Description of the Drawings

[0018] Figure 1 is a schematic diagram of the overall structure of the alignment platform of the present utility model;

[0019] Figure 2 is a schematic diagram of the structures of the first driving mechanism and the second driving mechanism;

[0020] Figure 3 is a schematic diagram of the installation method of the reinforcement bearing;

[0021] Figure 4 is a schematic diagram of the overall structure of the reinforcement bearing;

[0022] Figure 5 is an exploded view of the reinforcement bearing.

[0023] Description of the Drawings: 1 - load platform, 2 - bottom plate, 3 - first driving mechanism, 4 - second driving mechanism, 5 - guide rail, 6 - moving support plate, 7 - connecting bolt, 8 - first voice coil motor, 9 - first sliding member, 10 - rack, 11 - gear, 12 - second voice coil motor, 13 - second sliding member, 14 - connecting rod, 15 - slide rail, 16 - chute, 17 - bearing lower cover, 18 - bearing upper cover, 19 - bearing member, 20 - connecting shaft, 21 - through hole, 22 - shaft hole, 23 - thrust bearing, 24 - fastening bolt, 25 - roller, 26 - rolling groove. Detailed Embodiment

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0025] Please refer to Figures 1 to 4 , an alignment platform, including a load platform 1, a first driving mechanism 3 and a second driving mechanism 4.

[0026] The load platform 1 is fixedly connected with a gear 11, and the gear 11 is arranged parallel to the load platform 1.

[0027] The first driving mechanism 3 is used to drive the load platform 1 to rotate and / or move in a first direction. The first driving mechanism 3 includes two spaced-apart first voice coil motors 8. The driving directions of the two first voice coil motors 8 are parallel to each other. Each of the two first voice coil motors 8 is drivingly connected with a rack 10, and both of the two racks 10 are engaged with the gear 11. The two racks 10 are symmetrically arranged about the axis of the gear 11, and the orientations of the two first voice coil motors 8 are opposite.

[0028] The second driving mechanism 4 is used to drive the load platform 1 to move in the second direction, and the second direction is perpendicular to the first direction. The second driving mechanism 4 includes a second voice coil motor 12. The second voice coil motor 12 is drivingly connected with a connecting rod 14. During the movement of the connecting rod 14, it can drive the first driving mechanism 3 and the load platform 1 to move synchronously.

[0029] When the alignment platform of the present utility model is in use, an object to be aligned is placed on the load platform 1. The first driving mechanism 3 can drive the load platform 1 to move in the first direction. Specifically, by driving the first sliding members 9 of the two first voice coil motors 8 to slide in the same direction, the two first sliding members 9 respectively drive the two racks 10 to move, and the moving directions of the two racks 10 are the same. Also, because the driving directions of the two first voice coil motors 8 are parallel to each other, the two racks 8 are also parallel to each other. Moreover, both of the two racks 10 are engaged with the gear 11. Therefore, during the movement of the two racks 10, they will not drive the gear 11 to rotate, but will drag the gear 11 to slide, thereby being able to drive the load platform 1 to move synchronously and achieving the effect of driving the load platform 1 to move in the first direction. The first driving mechanism 3 can also drive the load platform 1 to rotate. Specifically, by driving the first sliding members 9 of the two first voice coil motors 8 to move in opposite directions, the two first sliding members 9 respectively drive the two racks 10 to move, and the moving directions of the two racks 10 are opposite. Both of the two racks 10 can drive the gear 11 to rotate. And because the two racks 10 are parallel to each other, that is, the two racks 10 are symmetrically arranged about the axis of the gear 11, the directions of the rotation tendencies generated by the two racks 10 acting on the gear 11 are the same. Therefore, the gear 11 can rotate smoothly, thereby driving the load platform 1 to rotate. The second driving mechanism 4 can drive the first driving mechanism 3 and the gear 11 to move synchronously in the second direction. Specifically, by driving the second sliding member 13 of the second voice coil motor 12 to move in the second direction, during the movement of the second sliding member 13, it drives the first driving mechanism 3 and the gear 11 to move synchronously in the second direction through the connecting rod 14, and then uses the gear 11 to drive the load platform 1 to move in the second direction. Also, because the first direction and the second direction are perpendicular to each other, by driving the load platform 1 to move, it can drive the object to be aligned to move arbitrarily on a plane and can also rotate, thus fully realizing the alignment function.

[0030] The utility model uses a driving mechanism based on a voice coil motor to drive the movement of the load platform 1, without the need to cooperate with a commutation structure, with a fast response speed, a simple control process, and adopts a transmission mode of a rack 10 cooperating with a gear 11, which is not prone to heat generation during the action process, will not cause a decrease in control accuracy due to excessive temperature, and has a lower cost; the utility model uses two first driving mechanisms 3 to drive the movement and rotation of the load platform 1, with higher control accuracy, and the types of objects to be controlled are reduced, which can further simplify the control process.

[0031] In order to ensure that the second driving mechanism 4 can stably drive the gear 11 and the two first driving mechanisms 3 to move synchronously, ensure the accuracy of the moving direction, and avoid deviation, the alignment platform further includes a bottom plate 2, the second driving mechanism 4 is fixedly arranged on the bottom plate 2, at least one guide rail 5 extending along the second direction is fixedly arranged on the bottom plate 2, a moving support plate 6 is slidably arranged on the guide rail 5, the first driving mechanism 3 is fixedly arranged on the moving support plate 6, a connecting rod 14 is fixedly connected with the moving support plate 6, and the gear 11 is movably connected with the moving support plate 6. By arranging the moving support plate 6 and arranging both the two first driving mechanisms 3 and the gear 11 on the moving support plate 6, it can be ensured that the gear 12 and the two first driving mechanisms 3 can move synchronously without position deviation, and the guide rail 5 can limit the direction of the moving support plate 6 to ensure the accuracy of direction control.

[0032] Please refer to Figures 3 to 5 , considering that the gear 11 and the load platform 1 are fixedly connected, when an object is placed on the load platform 1, its gravity will also directly act on the gear 11, and the gear 11 needs to move and rotate. In order to ensure that the gear 11 has sufficient flexibility, a reinforcing bearing for supporting the gear 11 is slidably arranged on the moving support plate 6. The reinforcing bearing includes an upper bearing cover 18 and a lower bearing cover 17 arranged up and down, and a plurality of rollers 25 are arranged between the upper bearing cover 18 and the lower bearing cover 17, wherein the upper bearing cover 18 is fixedly connected with the gear 11 through a plurality of connecting bolts 7. The gear 11 can be supported by the reinforcing bearing to ensure that the gear 11 can rotate smoothly. More specifically, a rolling groove 26 is formed on each of the upper bearing cover 18 and the lower bearing cover 17, and the two rolling grooves 26 are communicated with each other to form a raceway capable of accommodating the rollers 25.

[0033] Since the gear 11 needs to move in the first direction, and the gear 11 is connected to the upper bearing cover 18 of the reinforced bearing, the reinforced bearing also needs to be able to move in the first direction. To accurately control the moving direction of the reinforced bearing, two slide rails 15 extending in the first direction are fixedly arranged on the bottom plate 2. Two chutes 16 extending in the length direction are formed in the slide rails 15, and the two chutes 16 are distributed vertically. The upper bearing cover 18 and the lower bearing cover 17 of the bearing extend into the two chutes 16 correspondingly. The two chutes 16 can guide the upper bearing cover 18 and the lower bearing cover 17 respectively to ensure that the reinforced bearing can move in the first direction synchronously with the gear 11. In addition, two slide rails 15 can also be provided, with one chute 16 formed in each slide rail 15, and the upper bearing cover 18 and the lower bearing cover 17 are slidably arranged in the two chutes 16 correspondingly.

[0034] Furthermore, a central shaft is commonly passed through the upper bearing cover 18 and the lower bearing cover 17. One end of the central shaft extends above the upper bearing cover 18 and is fixedly sleeved with a thrust bearing 23. The thrust bearing 23 is used to press the upper bearing cover 18. The other end of the central shaft is fixedly connected with a limit block, and the limit block can abut against the lower surface of the lower bearing cover 17. Since the load of the object received by the loading platform 1 is transmitted downward to the position near the edge of the upper bearing cover 18, and the upper bearing cover 18 is supported by rollers 25, the central position of the upper bearing cover 18 will be stressed and deformed upward, resulting in the overall deformation of the upper bearing cover 18, and the friction between the edge position of the upper bearing cover 18 and the slide rail 15 will be aggravated, making it more likely to be damaged. By providing the thrust bearing 23, the central position of the upper bearing cover 18 can be reinforced, the stress at the central position of the upper bearing cover 18 can be shared, the deformation at the central position of the upper bearing cover 18 can be eliminated, and then the shape of the upper bearing cover 18 can be stabilized, avoiding excessive friction between the edge position of the upper bearing cover 18 and the slide rail 15, slowing down the wear rate of the upper bearing cover 18, and extending the service life of the reinforced bearing. Threads can be provided at the upper end of the central shaft, and nuts can be used to limit the thrust bearing 23.

[0035] On the basis of setting the reinforced bearing, the specific setting method of the gear 11 is as follows: a cylindrical bearing member 19 is vertically and fixedly arranged on the upper bearing cover 18. The upper end of the bearing member 19 is closed and fixedly connected with a connecting shaft 20. The gear 11 is fixedly sleeved on the connecting shaft 20. The lower end of the bearing member 19 is fixedly connected with the upper bearing cover 18 through a plurality of fastening bolts 24 evenly distributed in the circumferential direction. The bearing member 19 can support the gear 11 on the one hand and protect the thrust bearing 23 on the other hand, preventing external dust and other impurities from invading the thrust bearing 23.

[0036] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to the embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A positioning platform, characterized in that: It comprises a loading platform (1), a first driving mechanism (3) and a second driving mechanism (4); The object-carrying platform (1) is fixedly connected to a gear (11), and the gear (11) is arranged parallel to the object-carrying platform (1); The first driving mechanism (3) is used to drive the object-carrying platform (1) to rotate and / or move along a first direction, the first driving mechanism (3) comprising two first voice coil motors (8) arranged at an interval, the driving directions of the two first voice coil motors (8) being parallel to each other, the two first voice coil motors (8) each being driven and connected to a rack (10), and the two racks (10) both meshing with the gear (11); The second driving mechanism (4) is used to drive the loading platform (1) to move along a second direction, and the second direction and the first direction are perpendicular to each other. The second driving mechanism (4) comprises a second voice coil motor (12). The second voice coil motor (12) is driven and connected to a connecting rod (14). During the movement of the connecting rod (14), the first driving mechanism (3) and the loading platform (1) can be driven to move synchronously.

2. The alignment platform according to claim 1, characterized in that: The alignment platform further comprises a base plate (2), the second driving mechanism (4) being fixedly arranged on the base plate (2), at least one guide rail (5) extending along the second direction being fixedly arranged on the base plate (2), a movable support plate (6) being slidably arranged on the guide rail (5), the first driving mechanism (3) being fixedly arranged on the movable support plate (6), and the gear (11) being movably connected to the movable support plate (6).

3. The alignment platform according to claim 2, characterized in that: A reinforced bearing for supporting the gear (11) is slidably disposed on the movable support plate (6), the reinforced bearing comprising an upper bearing cover (18) and a lower bearing cover (17) disposed up and down, a plurality of rollers (25) being disposed between the upper bearing cover (18) and the lower bearing cover (17), wherein the upper bearing cover (18) is fixedly connected to the gear (11) via a plurality of connecting bolts (7).

4. The alignment platform according to claim 3, characterized in that: A central axis is provided on the upper bearing cover (18) and the lower bearing cover (17). One end of the central axis extends to the upper side of the upper bearing cover (18) and a thrust bearing (23) is fixedly sleeved thereon. The thrust bearing (23) is used to press the upper bearing cover (18).

5. The alignment platform according to claim 3, characterized in that: A cylindrical bearing member (19) is vertically fixedly disposed on the bearing upper cover (18); the upper end of the bearing member (19) is closed and fixedly connected to a connecting shaft (20); and the gear (11) is fixedly sleeved on the connecting shaft (20).

6. The alignment platform according to claim 5, characterized in that: The lower end of the carrier (19) is fixedly connected to the bearing upper cover (18) via a plurality of fastening bolts (24) evenly distributed along the circumferential direction.

7. The alignment platform according to claim 3, characterized in that: Two slide rails (15) extending along the first direction are fixedly arranged on the base plate (2), and two slide grooves (16) extending along the length direction are provided on the slide rails (15), and the two slide grooves (16) are distributed up and down, and the upper bearing cover (18) and the lower bearing cover (17) extend into the two slide grooves (16) respectively.

8. The alignment platform according to claim 2, characterized in that: The connecting rod (14) is fixedly connected to the movable support plate (6).

9. The alignment platform according to claim 1, characterized in that: The two racks (10) are symmetrically arranged about the axis of the gear (11), and the two first voice coil motors (8) are oriented in opposite directions.

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