Precision-adjustable rotating platform

Abstract

The invention relates to a precision-adjustable rotating platform, and relates to the technical field of positioning devices. Comprising a turntable bottom plate, a turntable main body, a positioning block, a second bearing, a roller shaft, a mounting block and a driving mechanism, the rotary table body is arranged on the rotary table bottom plate, one end of the positioning block is connected with the rotary table body, the other end of the positioning block is rotationally connected with the roller shaft through a second bearing, and the bottom end of the roller shaft is installed on the installation block. And rolling is generated between the second bearing mounted on the roller shaft and the positioning block, so that the rotary table main body is driven to rotate. The rotating platform is stable and reliable, and the rotating angle and precision of the rotating platform can be adjusted.

Description

Technical Field

[0001] The invention relates to the technical field of positioning devices, in particular to an adjustable precision rotating platform. Background Art

[0002] With the advancement of science and technology, the demand for medium and large precision rotating platforms is increasing. However, some existing precision rotating platforms have poor rotation stability due to complex structure, small load-bearing capacity, high heat generation during operation; others cannot meet the use requirements of precise positioning in industrial applications because the rotating platforms cannot be precisely adjusted. Therefore, a rotating platform with a new structure is needed to solve the above problems. In view of this, how to provide a stable, reliable, and precision-adjustable limited-angle rotating platform has become a technical problem that technicians in this field need to solve urgently. Summary of the invention

[0003] In order to solve at least one technical problem in the background technology, the present invention provides an adjustable precision rotating platform, which is stable and reliable and can adjust the rotation angle and precision of the rotating platform.

[0004] To achieve the above-mentioned purpose, the present invention provides an adjustable precision rotating platform, comprising: a turntable bottom plate, a turntable body, a positioning block, a second bearing, a roller shaft, a mounting block and a driving mechanism;

[0005] The turntable body is arranged on the turntable bottom plate, one end of the positioning block is connected to the turntable body, and the other end is rotatably connected to the roller shaft through a second bearing, the bottom end of the roller shaft is installed on the mounting block, and the driving mechanism is located below the mounting block, and is used to drive the mounting block to move in a straight line, and rolling is generated between the second bearing installed on the roller shaft and the positioning block, thereby driving the turntable body to rotate.

[0006] Furthermore, the turntable body includes a bearing seat, a bearing pressure ring, a first bearing and a rotating shaft plate. The bearing seat is fixed to the turntable bottom plate by a first screw, the first bearing is arranged between the bearing seat and the rotating shaft plate, the bearing pressure ring is arranged above the first bearing and is fixedly connected to the outer ring of the first bearing by a second screw, the rotating shaft plate is connected to the inner ring of the first bearing, and the top of one side of the rotating shaft plate is connected to the positioning block through a connecting piece.

[0007] Furthermore, the positioning member includes a pin and a nut, the rotating shaft plate is connected to the positioning block via the pin, and the portion of the pin top extending out of the positioning block is locked via the nut.

[0008] Furthermore, the turntable body also includes a blocking cover, and the blocking cover is fixed below the rotating shaft plate by a fifth screw.

[0009] Furthermore, the driving mechanism includes a driving motor, a sliding block, a sliding rail and a ball screw. The driving motor and the sliding rail are both installed on the turntable base plate. The output end of the driving motor is connected to the ball screw. The ball screw passes through the sliding block and is threadedly connected to the sliding block. The sliding block is slidably set in the sliding rail and is connected to the mounting block by a fourth screw.

[0010] Furthermore, it also includes a baffle, which is mounted on the positioning block through a third screw.

[0011] The beneficial effects of the present invention are:

[0012] Considering that the traditional rotating platform is limited by the transmission mechanism, volume and manufacturing cost, if a high-precision rotation angle is required, the manufacturing cost will be greatly increased. Therefore, the present invention converts the linear motion of the mounting block into the rotational motion of the rotating platform body by rotating the positioning block and the roller shaft, which is stable and reliable, and can accurately adjust the rotation angle of the rotating platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the present invention;

[0014] Figure 2 is a cross-sectional view of the present invention;

[0015] Figure 3 A top view of the present invention;

[0016] Figure 4 It is a state change diagram of the present invention.

[0017] Among them, 1-turntable base plate, 2-first screw, 3-bearing seat, 4-bearing pressure ring, 5-rotating shaft plate, 6-first bearing, 7-second screw; 8-pin, 9-nut, 10-positioning block, 11-stop nail, 12-second bearing, 13-third screw, 14-baffle, 15-roller shaft, 16-mounting block, 17-fourth screw, 18-ball screw, 19-fifth screw, 20-block cover, 21-drive motor. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0020] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0021] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0022] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0023] To achieve the above purpose, Figure 1-4As shown, the present invention provides an adjustable precision rotating platform, including: a turntable bottom plate 1, a turntable body, a positioning block 10, a second bearing 12, a roller shaft 15, a mounting block 16 and a driving mechanism; the turntable body is arranged on the turntable bottom plate 1, one end of the positioning block 10 is connected to the turntable body, and the other end is rotatably connected to the roller shaft 15 through the second bearing 12, the bottom end of the roller shaft 15 is installed on the mounting block 16, and the driving mechanism is located below the mounting block 16, and is used to drive the mounting block 16 to move in a straight line, and to generate rolling between the second bearing 12 installed on the roller shaft 15 and the positioning block 10, thereby driving the turntable body to rotate. The second bearing 12 is fixed by a stop pin 11, and the second bearing 12 arranged on the roller shaft 15 prevents the roller shaft 15 from directly contacting the positioning block 10. The arrangement of the second bearing 12 can also change the sliding between the roller shaft 15 and the positioning block 10 to rolling.

[0024] The turntable body includes a bearing seat 3, a bearing pressure ring 4, a first bearing 6 and a rotating shaft plate 5. The bearing seat 3 is fixed to the turntable bottom plate 1 by a first screw 2. The first bearing 6 is arranged between the bearing seat 3 and the rotating shaft plate 5. The bearing pressure ring 4 is arranged above the first bearing 6 and is fixedly connected to the outer ring of the first bearing 6 by a second screw 7. The rotating shaft plate 5 is connected to the inner ring of the first bearing 6. The top of one side of the rotating shaft plate 5 is connected to the positioning block 10 by a connecting piece. The rotating shaft plate 5 is used to install the workpiece to be rotated.

[0025] The positioning member includes a pin 8 and a nut 9 . The rotating shaft plate 5 is connected to the positioning block 10 via the pin 8 , and the portion of the top end of the pin 8 extending out of the positioning block 10 is locked via the nut 9 .

[0026] The turntable body further includes a blocking cover 20 , and the blocking cover 20 is fixed below the rotating shaft plate 5 by a fifth screw 19 .

[0027] The driving mechanism includes a driving motor 21, a sliding block, a sliding rail and a ball screw 18. The driving motor 21 and the sliding rail are both installed on the turntable bottom plate 1. The output end of the driving motor 21 is connected to the ball screw, which passes through the sliding block and is threadedly connected to the sliding block. The sliding block is slidably arranged in the sliding rail and is connected to the mounting block 16 through a fourth screw 17. The driving motor 21 drives the ball screw 18 to rotate, thereby driving the mounting block 16 installed on the sliding block and the roller shaft 15 on the mounting block 16 to perform linear motion, and rolling is generated between the second bearing 12 installed on the roller shaft 15 and the positioning block 10, thereby driving the rotating shaft plate 5 to perform rotational motion.

[0028] The present invention further comprises a baffle plate 14 , which is mounted on the positioning block 10 via a third screw 13 and is used to limit the rotation angle of the rotating shaft plate 5 .

[0029] Considering that the traditional rotating platform is limited by the transmission mechanism, volume and manufacturing cost, if a high-precision rotation angle is required, the manufacturing cost will be greatly increased. Therefore, the present invention converts the linear motion of the mounting block into the rotational motion of the rotating platform body by rotating the positioning block and the roller shaft, which is stable and reliable, and can adjust the rotation angle and precision of the rotating platform.

[0030] like Figure 4 As shown, the rotation angle θ of the shaft plate is:

[0031]

[0032] Where:

[0033] L is the distance between the roller axis and the center axis of the turntable;

[0034] P is the linear distance that the roller axis moves on the ball screw, and its size is

[0035]

[0036] Where: L d is the lead of the ball screw, and β is the rotation angle of the drive motor.

[0037] For example: using a drive motor, the step angle is 1.8°, the ball screw lead is 10mm, and L is 350mm, 400mm, and 450mm respectively. Theoretically, for each step angle of the drive motor, the rotation angle of the shaft plate is 0.0082°, 0.0072°, and 0.0064° respectively. The rotation angle of the shaft plate can be adjusted accurately to the ten-thousandth place, indicating that precision adjustment can be achieved by changing the dimension L.

[0038] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An adjustable precision rotating platform, characterized in that: include: Turntable bottom plate, turntable body, positioning block, second bearing, roller shaft, mounting block and driving mechanism; The turntable body is arranged on the turntable bottom plate, one end of the positioning block is connected to the turntable body, and the other end is rotatably connected to the roller shaft through a second bearing, the bottom end of the roller shaft is installed on the mounting block, and the driving mechanism is located below the mounting block, and is used to drive the mounting block to move in a straight line, and rolling is generated between the second bearing installed on the roller shaft and the positioning block, thereby driving the turntable body to rotate.

2. The adjustable precision rotating platform according to claim 1, characterized in that: The turntable body includes a bearing seat, a bearing pressure ring, a first bearing and a rotating shaft plate. The bearing seat is fixed to the turntable bottom plate by a first screw. The first bearing is arranged between the bearing seat and the rotating shaft plate. The bearing pressure ring is arranged above the first bearing and is fixedly connected to the outer ring of the first bearing by a second screw. The rotating shaft plate is connected to the inner ring of the first bearing, and the top of one side of the rotating shaft plate is connected to the positioning block through a connecting piece.

3. The adjustable precision rotating platform according to claim 2, characterized in that: The positioning member comprises a pin and a nut. The rotating shaft plate is connected to the positioning block via the pin, and the portion of the pin top extending out of the positioning block is locked via the nut.

4. An adjustable precision rotating platform as claimed in claim 2 or 3, characterized in that: The turntable body also includes a blocking cover, which is fixed below the rotating shaft plate by a fifth screw.

5. The adjustable precision rotating platform according to claim 4, characterized in that: The driving mechanism includes a driving motor, a sliding block, a sliding rail and a ball screw. The driving motor and the sliding rail are both installed on the turntable bottom plate. The output end of the driving motor is connected to the ball screw. The ball screw passes through the sliding block and is threadedly connected to the sliding block. The sliding block is slidably set in the sliding rail and is connected to the mounting block through a fourth screw.

6. The adjustable precision rotating platform according to claim 1 or 5, characterized in that: It also includes a baffle, which is mounted on the positioning block through a third screw.

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