Transmission module and biaxial adjustment device

Abstract

The utility model discloses a transmission module and biaxial adjusting device. Transmission module includes motor, planetary gear set, inner bearing, outer bearing and fixed frame. Outer bearing is connected with fixed frame, and inner bearing is coaxial with outer bearing and is rotatably connected. Biaxial adjusting device includes first frame body, second frame body, first drive component and second drive component, and first frame body is equipped with first end, second end and connecting portion, and second frame body is arranged between first end and second end and rotates around first pivot, and first drive component drives second frame body to rotate, and second drive component makes first frame body rotate around second pivot, and first pivot and second pivot are orthogonally arranged. The biaxial adjusting device of the utility model can realize the adjustment of two orthogonal directions, and is stable and reliable in operation.

Description

Technical Field

[0001] This utility model relates to the field of mechanical transmission technology, and in particular to a transmission module and a dual-axis adjustment device. Background Technology

[0002] Traditional dual-axis adjustment devices generally use worm gear drives or multi-stage gear drives. Although these drives can achieve a certain reduction ratio, they have many shortcomings: First, in order to achieve the required large transmission ratio, multi-stage gear combinations are often required, resulting in an excessively long transmission chain. This not only makes the overall structure complex and bulky, occupying a large amount of space, but also increases manufacturing costs and assembly difficulty. Second, the cumulative error in the transmission chain will reduce the transmission accuracy, and the backlash and wear between gears will produce backlash errors, affecting positioning accuracy and operational stability. Utility Model Content

[0003] In order to overcome the shortcomings of the prior art, this utility model provides a transmission module and a dual-axis adjustment device with a compact structure, high transmission accuracy, and stable and reliable operation.

[0004] The technical solution adopted by this utility model to solve its technical problem is: A transmission module includes: a motor having an output gear; a fixed frame including a mounting bracket and a locking bracket fixedly connected to each other; a planetary gear set including multiple planetary gears, each planetary gear having a two-stage gear structure with a large-diameter gear portion and a small-diameter gear portion, the planetary gears being rotatably mounted in the fixed frame, the large-diameter gear portion meshing with the output gear; and a bearing assembly including an inner bearing and an outer bearing, the inner wall of the inner bearing having an internal gear ring meshing with the small-diameter gear portion, the inner bearing and the outer bearing being rotatably coupled relative to each other, the outer bearing being fixedly connected to the motor; wherein the motor drives the inner bearing to rotate and output power through the planetary gear set.

[0005] Furthermore, the number of planetary gears is at least three; the planetary gears are mounted between the mounting bracket and the locking bracket via a rotating shaft.

[0006] Furthermore, the locking frame has a positioning through hole at its center; the inner bearing has a cylindrical structure with one end open, and a positioning protrusion at the bottom of the cylinder that rotates with the positioning through hole.

[0007] Furthermore, the outer wall of the inner bearing is slidably engaged with the outer bearing via a sliding member.

[0008] Furthermore, the sliding element is a rolling element or a sliding bearing.

[0009] Furthermore, a buffer element is provided on the contact surface between the motor and the fixed frame.

[0010] A dual-axis adjustment device includes: a first frame having a first end, a second end, and a connecting portion connecting the first end and the second end, the first end and the second end being disposed opposite to each other and forming a receiving space; a second frame rotatably mounted in the receiving space, the two ends of the second frame being rotatably connected to the first end and the second end, respectively; a first drive assembly mounted on the first end, the output end of the first drive assembly being connected to the second frame for driving the second frame to rotate relative to the first frame about a first rotating axis; and a second drive assembly mounted on an external support structure, the output end of the second drive assembly being connected to the connecting portion for driving the first frame to rotate about a second rotating axis, the first rotating axis and the second rotating axis being perpendicular to each other; wherein at least one of the first drive assembly and the second drive assembly is a transmission module as described above.

[0011] Furthermore, the first drive assembly is the transmission module, with its inner bearing fixedly connected to the second frame and its outer bearing fixedly connected to the first end; the second drive assembly is the transmission module, with its inner bearing connected to the connecting part and its outer bearing fixedly connected to the external support structure.

[0012] Furthermore, one end of the second frame is rotatably connected to the first end via a rotating connector, and the other end is rotatably connected to the second end via a transmission module; the axes of the first rotating connector and the transmission module coincide with the first rotating shaft.

[0013] Furthermore, the first drive component and / or the second drive component further include an angle detector for detecting the corresponding rotation angle; the dual-axis adjustment device further includes a controller, which is electrically connected to the first drive component, the second drive component and the angle detector, for controlling the movement of the first drive component and the second drive component according to the angle feedback signal.

[0014] The beneficial effects of this utility model are: The transmission module in this case utilizes a two-stage planetary gear set, achieving a large transmission ratio in a single-stage transmission. The large-diameter gear meshes with the motor output gear for first-stage reduction, while the small-diameter gear meshes with the inner bearing's internal gear ring for second-stage reduction. The entire transmission chain is short and compact, effectively reducing the accumulation of transmission errors and improving transmission accuracy and efficiency. The coaxial fit between the inner and outer bearings integrates transmission and support functions, eliminating the need for additional support structures. This simplifies the overall structure, reduces size and weight, and improves system rigidity and operational stability. Furthermore, the dual-axis adjustment device, through the integrated frame of the first frame and the arrangement of the second frame, enables adjustment in two orthogonal directions. The dual-axis adjustment device, including the aforementioned transmission module, offers advantages such as compact structure, high transmission accuracy, smooth operation, rapid response, and convenient maintenance. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a three-dimensional structural schematic diagram of the present invention - 1; Figure 2 This is a three-dimensional structural schematic diagram of the present invention - 2; Figure 3 This is a schematic diagram of the disassembled structure of the transmission module of this utility model; Figure 4 This is a cross-sectional structural diagram of the transmission module of this utility model.

[0017] in, 10. First frame; 11. First end; 12. Second end; 13. Connecting part; 20. Second frame; 30. First driving component; 40. Second drive component; 50. Transmission module; 51. Motor; 511. Output gear; 52. Fixed frame; 521. Mounting bracket; 522. Locking bracket; 5221. Positioning through hole; 53. Planetary gear set; 54. Bearing assembly; 541. Inner bearing; 5411. Inner gear ring; 5412. Positioning protrusion; 542. Outer bearing; 543. Sliding component; 55. Buffer component; 60. Shell. Detailed Implementation

[0018] The following will clearly and completely describe the concept, specific structure, and technical effects of this utility model in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connections / linkages involved in the patent do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in this utility model can be combined interactively without contradicting each other.

[0019] Reference Figure 1 , Figure 2 The dual-axis adjustment device of this case has a main support structure consisting of a first frame 10, wherein the first end 11 and the second end 12 are respectively located on both sides of the first frame 10 and are arranged opposite each other. The connecting part 13 connects the first end 11 and the second end 12 into a whole from the middle area, thereby forming a receiving space between the first end 11 and the second end 12. This receiving space is used to accommodate the second frame 20. The second frame 20 is installed in the receiving space as a rotatable component. Its two ends are respectively rotatably connected to the first end 11 and the second end 12 through rotatable connection structures, so that the second frame 20 can rotate relative to the first frame 10 within the receiving space.

[0020] The first drive assembly 30 is fixedly installed on the outside of the first end 11. Its output end passes through the first end 11 and is fixedly connected to the corresponding end of the second frame 20. When the first drive assembly 30 is working, it drives the second frame 20 to rotate around the first rotating shaft through its output end, thereby realizing the rotation of the second frame 20 relative to the first frame 10.

[0021] The second drive assembly 40 is mounted on the connecting part 13. Its main body is connected to an external support structure such as a tripod or a fixed base, while its output end is fixedly connected to the connecting part 13. When the second drive assembly 40 is working, since its main body is fixed to the external support structure, it drives the entire first frame 10 and the second frame 20 on it to rotate around the second axis through its output end.

[0022] The first and second rotating axes are set perpendicular to each other in space. For example, the first rotating axis is a horizontal axis and the second rotating axis is a vertical axis, thereby realizing the dual-axis adjustment function.

[0023] In some embodiments, a housing 60 is also included, which covers the outside of the biaxial adjustment device.

[0024] In some embodiments, refer to Figure 1-4 The first drive assembly 30 and / or the second drive assembly 40 is a transmission module 50, including a motor 51 with an output gear 511; a fixed frame 52 including a mounting bracket 521 and a locking bracket 522 fixedly connected to each other; a planetary gear set 53 including multiple planetary gears, each of which is a two-stage gear structure with a large-diameter gear portion and a small-diameter gear portion, the planetary gears being rotatably mounted in the fixed frame 52, the large-diameter gear portion meshing with the output gear 511; and a bearing assembly 54 including an inner bearing 541 and an outer bearing 542, the inner wall of the inner bearing 541 being provided with an inner gear ring 5411 meshing with the small-diameter gear portion, the inner bearing 541 and the outer bearing 542 being rotatably coupled relative to each other, the outer bearing 542 being fixedly connected to the motor 51; wherein, the motor 51 drives the inner bearing 541 to rotate and output power through the planetary gear set 53.

[0025] It is understandable that the transmission module 50 uses the motor 51 as a power source, and the output shaft of the motor 51 is equipped with an output gear 511, which directly meshes with the planetary gear set 53 for transmission.

[0026] Reference Figure 3 , 4 The fixed frame 52 consists of two parts: a mounting bracket 521 and a locking bracket 522. The mounting bracket 521 and the locking bracket 522 are fixedly connected to each other by bolts or other fixing methods to form an integral frame structure. The planetary gear set 53 contains multiple planetary gears, each of which adopts a two-stage gear structure, that is, a large-diameter gear section and a small-diameter gear section are arranged on the same gear shaft, wherein the diameter of the large-diameter gear section is larger than the diameter of the small-diameter gear section, forming a reduction transmission structure. These planetary gears are rotatably mounted in the fixed frame 52 via bearings or bushings, specifically in the space between the mounting bracket 521 and the locking bracket 522. The large-diameter gear section meshes with the output gear 511 of the motor 51, receiving power input from the motor 51.

[0027] Reference Figure 3 , 4 The bearing assembly 54 consists of an inner bearing 541 and an outer bearing 542. The inner wall of the inner bearing 541 is machined with an internal gear ring 5411, which meshes with the small diameter gear portion of each planetary gear. The inner bearing 541 and the outer bearing 542 are rotatably fitted together by balls or sliding surfaces. The outer bearing 542 is fixedly connected to the housing of the motor 51 by bolts or other fixing methods, so that the outer bearing 542 remains stationary.

[0028] When the motor 51 is working, the output gear 511 drives the large diameter gear part of each planetary gear to rotate. Due to the two-stage structure of the planetary gear, the small diameter gear part rotates at a higher speed and drives the internal gear ring 5411 of the inner bearing 541, thereby causing the inner bearing 541 to rotate relative to the outer bearing 542 and output power. For example, in a dual-axis adjustment device, the inner bearing 541 can be connected to the second frame 20 or the first frame 10 to achieve angle adjustment.

[0029] In some embodiments, the number of planetary gears is at least three; the planetary gears are mounted between the mounting bracket 521 and the locking bracket 522 via a rotating shaft. For example, the number of planetary gears can be three, four, or six, and these planetary gears are evenly distributed circumferentially within the fixed frame 52 to ensure smooth transmission and uniform load distribution. Each planetary gear is mounted via a rotating shaft, with both ends of the shaft supported on the mounting bracket 521 and the locking bracket 522 respectively. Specifically, shaft holes or bearing seats are machined at corresponding positions on the mounting bracket 521 and the locking bracket 522. One end of the rotating shaft is inserted into the shaft hole of the mounting bracket 521, and the other end is inserted into the shaft hole of the locking bracket 522, thereby reliably positioning the planetary gear within the space between the mounting bracket 521 and the locking bracket 522. The planetary gear is mounted on the rotating shaft and can rotate freely around the shaft. When three or more planetary gears mesh with the output gear 511 of the motor 51 at the same time, the load borne by each planetary gear is reduced accordingly, which improves the load-bearing capacity and service life of the transmission module 50. At the same time, the symmetrical arrangement of multiple planetary gears also helps to reduce vibration and noise during transmission.

[0030] In some embodiments, refer to Figure 3 , 4 The locking frame 522 has a positioning through hole 5221 at its center; the inner bearing 541 is a cylindrical structure with one end open, and its bottom has a positioning protrusion 5412 that rotatably engages with the positioning through hole 5221. It can be understood that a positioning through hole 5221 is machined at the center of the locking frame 522, extending through the thickness of the locking frame 522, to provide positioning support for the inner bearing 541. The inner bearing 541 is a cylindrical structure with one end open, meaning it has a cylindrical wall and a cylindrical bottom, while the other end remains open. A positioning protrusion 5412 is integrally formed or fixedly connected to the center of the bottom of the inner bearing 541. This positioning protrusion 5412 extends axially outward, and its outer diameter matches the inner diameter of the positioning through hole 5221 at the center of the locking frame 522.

[0031] During assembly, the locating protrusion 5412 of the inner bearing 541 is inserted into the locating through hole 5221 of the locking frame 522. A rotational fit is formed between the locating protrusion 5412 and the locating through hole 5221. A smooth sliding fit can be ensured by setting a bearing between the mating surfaces or by precision machining, thereby enabling the inner bearing 541 to rotate stably relative to the locking frame 522. This structure ensures the axial positioning and radial centering of the inner bearing 541 during rotation, preventing the inner bearing 541 from shifting or wobbling during operation.

[0032] In some embodiments, refer to Figure 3 , 4 The outer wall of the inner bearing 541 is slidably fitted with the outer bearing 542 via a sliding member 543. The outer wall of the inner bearing 541 and the outer bearing 542 are rotatably connected via the sliding member 543. The outer wall of the inner bearing 541 refers to the outer cylindrical surface of the cylindrical structure of the inner bearing 541, which is machined to ensure surface smoothness and roundness. The sliding member 543 is disposed between the outer wall of the inner bearing 541 and the inner wall of the outer bearing 542, forming a rotational interface, allowing the inner bearing 541 to rotate smoothly inside the outer bearing 542. The sliding member 543 can be an annular sliding bearing sleeve, an oil-impregnated bearing, or a friction-reducing coating applied to the mating surface. Preferably, the sliding member 543 is a rolling element or a sliding bearing.

[0033] In some embodiments, a buffer 55 is provided on the contact surface between the motor 51 and the fixed frame 52. Specifically, a buffer 55 is added between the mounting surface of the motor 51 and the corresponding mounting surface of the fixed frame 52. The buffer 55 has a sheet-like or washer-like structure and covers the entire or part of the area between the two contact surfaces. The buffer 55 is made of a material with elastic and vibration-damping properties, such as a rubber pad, a silicone pad, or a polyurethane material. These materials can undergo elastic deformation under pressure to absorb the vibration energy generated when the motor 51 is running.

[0034] In some embodiments, the first drive assembly 30 is the transmission module 50, with its inner bearing 541 fixedly connected to the second frame 20 and its outer bearing 542 fixedly connected to the first end 11; the second drive assembly 40 is the transmission module 50, with its inner bearing 541 connected to the connecting part 13 and its outer bearing 542 fixedly connected to the external support structure.

[0035] It is understood that the first drive assembly 30 adopts the aforementioned transmission module 50 structure, and its inner bearing 541 is fixedly connected to the bottom or side of the second frame 20 by bolts or other fixing methods, so that the rotation of the inner bearing 541 can directly drive the rotation of the second frame 20. The outer bearing 542 of the first drive assembly 30 is fixedly connected to the first end 11 of the first frame 10, and the outer bearing 542 is fastened to the first end 11 by bolts. Since the outer bearing 542 is fixedly connected to the motor 51 and remains stationary, when the inner bearing 541 rotates, the second frame 20 rotates relative to the first frame 10.

[0036] Meanwhile, the second drive assembly 40 also adopts the same transmission module 50 structure. Its inner bearing 541 is connected to the connecting part 13 of the first frame 10. The rotation of the inner bearing 541 can be transmitted to the connecting part 13, thereby driving the entire first frame 10 to rotate. The outer bearing 542 of the second drive assembly 40 is fixedly connected to the external support structure, for example, by bolts to fix the outer bearing 542 to the equipment base or bracket, so that the outer bearing 542 remains stationary. This allows the first drive assembly 30 to control the rotation of the second frame 20 relative to the first frame 10, realizing one degree of rotational freedom, while the second drive assembly 40 controls the rotation of the first frame 10 relative to the external support structure, realizing another degree of rotational freedom. The cooperative use of the two transmission modules 50 realizes the rotational control of the dual-axis adjustment device in two orthogonal directions.

[0037] In some embodiments, refer to Figure 1 , 2 One end of the second frame 20 is rotatably connected to the first end 11 via a rotating connector, and the other end is rotatably connected to the second end 12 via a transmission module 50; the axes of the first rotating connector and the transmission module 50 coincide with the first rotating shaft.

[0038] It is understood that one end of the second frame 20 is rotatably connected to the first end 11 of the first frame 10 through a rotatable connector. The rotatable connector can be a bearing, bushing, or shaft structure, which is installed in the mounting hole at one end of the second frame 20 and cooperates with the corresponding support structure of the first end 11, so that this end of the second frame 20 can rotate freely relative to the first end 11.

[0039] The other end of the second frame 20 is rotatably connected to the second end 12 of the first frame 10 via a transmission module 50. The transmission module 50 is the aforementioned transmission module 50 that includes a motor 51, a planetary gear set 53, and a bearing assembly 54. The inner bearing 541 of the transmission module 50 is fixedly connected to the other end of the second frame 20, and the outer bearing 542 is fixedly connected to the second end 12, thereby providing both rotational support and driving force.

[0040] During installation and commissioning, it is essential to ensure that the axis of the rotating connector is aligned with the axis of rotation of the transmission module 50 and coincides with the first rotating shaft. This ensures both the stability of the rotation of the second frame 20 and the accuracy of power transmission and angle control.

[0041] In some embodiments, the first drive component 30 and / or the second drive component 40 further include an angle detector (not shown) for detecting a corresponding rotation angle; the dual-axis adjustment device further includes a controller electrically connected to the first drive component 30, the second drive component 40 and the angle detector, for controlling the movement of the first drive component 30 and the second drive component 40 according to the angle feedback signal.

[0042] It is understood that the angle detector can be an angle sensor such as an encoder, rotary transformer or potentiometer, installed on the inner bearing 541 of the transmission module 50 or on the rotating component connected thereto, to detect the rotation angle of the inner bearing 541 in real time, thereby obtaining the rotation angle of the second frame 20 relative to the first frame 10 or the rotation angle of the first frame 10 relative to the external support structure.

[0043] An angle detector rotates synchronously with the rotating part being measured via a mechanical connection and converts the mechanical angle into an electrical signal output, such as an encoder outputting a pulse signal or an absolute position signal.

[0044] The dual-axis adjustment device also includes a controller, which can be a microcontroller, a PLC or a dedicated motion controller. The controller establishes an electrical connection with the motor 51 of the first drive assembly 30, the motor 51 of the second drive assembly 40 and each angle detector through signal lines.

[0045] The controller receives the angle feedback signal from the angle detector, compares the actual rotation angle with the target angle, calculates the angle deviation, and then generates a corresponding control signal according to the control algorithm. The controller controls the speed and direction of the motor 51 in the first drive assembly 30 and the second drive assembly 40 through the drive circuit.

[0046] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A transmission module, characterized in that, include: An electric motor with an output gear; Fixed frame, including mounting brackets and locking brackets that are fixedly connected to each other; A planetary gear set includes multiple planetary gears, each of which is a two-stage gear structure having a large-diameter gear section and a small-diameter gear section. The planetary gears are rotatably mounted in the fixed frame, and the large-diameter gear section meshes with the output gear. The bearing assembly includes an inner bearing and an outer bearing. The inner wall of the inner bearing is provided with an internal gear ring that meshes with the small-diameter gear portion. The inner bearing and the outer bearing are rotatably coupled relative to each other. The outer bearing is fixedly connected to the motor. The motor drives the inner bearing to rotate and output power through the planetary gear set.

2. The transmission module according to claim 1, characterized in that: The number of planetary gears is at least three; the planetary gears are mounted between the mounting bracket and the locking bracket via a rotating shaft.

3. The transmission module according to claim 1, characterized in that: The locking frame has a positioning through hole at its center; the inner bearing has a cylindrical structure with one end open, and a positioning protrusion at the bottom of the cylinder that rotates with the positioning through hole.

4. The transmission module according to claim 1, characterized in that: The outer wall of the inner bearing is slidably fitted with the outer bearing through a sliding member.

5. The transmission module according to claim 4, characterized in that: The sliding element is a rolling element or a sliding bearing.

6. The transmission module according to claim 1, characterized in that: A buffer is provided on the contact surface between the motor and the fixed frame.

7. A dual-axis adjustment device, characterized in that, include: The first frame has a first end, a second end, and a connecting portion connecting the first end and the second end, wherein the first end and the second end are disposed opposite to each other and form a receiving space; The second frame is rotatably installed in the receiving space, and the two ends of the second frame are rotatably connected to the first end and the second end, respectively. A first drive assembly is mounted on the first end, and the output end of the first drive assembly is connected to the second frame, for driving the second frame to rotate relative to the first frame around the first axis. The second drive assembly is mounted on the external support structure. The output end of the second drive assembly is connected to the connecting part and is used to drive the first frame to rotate around the second rotating shaft. The first rotating shaft and the second rotating shaft are perpendicular to each other. Wherein, at least one of the first drive component and the second drive component is the transmission module according to any one of claims 1-6.

8. The dual-axis adjustment device according to claim 7, characterized in that, The first drive component is the transmission module, whose inner bearing is fixedly connected to the second frame, and whose outer bearing is fixedly connected to the first end. The second drive component is the transmission module, whose inner bearing is connected to the connecting part, and whose outer bearing is fixedly connected to the external support structure.

9. The dual-axis adjustment device according to claim 7, characterized in that, One end of the second frame is rotatably connected to the first end via a rotating connector, and the other end is rotatably connected to the second end via a transmission module; the axes of the rotating connector and the transmission module coincide with the first rotating shaft.

10. The dual-axis adjustment device according to claim 7, characterized in that, The first drive component and / or the second drive component further include an angle detector for detecting the corresponding rotation angle; The dual-axis adjustment device further includes a controller, which is electrically connected to the first drive component, the second drive component, and the angle detector, and is used to control the movement of the first drive component and the second drive component according to the angle feedback signal.

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