Radial positioning mechanism of circular arc guide rail

Abstract

The utility model discloses a radial positioning mechanism of arc guide rail belongs to guide rail transmission equipment technical field, including support, guide frame, the adjusting block of movable along guide frame and fixed gear ring, the integrated setting of adjusting block and adjusting mechanism is driven mechanism, and the drive gear of driven mechanism is engaged with same fixed gear ring with the receiving gear of adjusting mechanism, when working, motor drives drive gear rotation to promote adjusting block movement, and receiving gear is driven to roll, and the amount of rotation is detected by sensor through the rotation of linkage inside grating structure to accurate calculation displacement, the utility model discloses the integration of drive and high accuracy detection function, solved the problem of low positioning accuracy of prior art structure dispersion, has compact structure, the high integration, realized closed -loop control, and the beneficial effect of accurate and reliable positioning.

Description

Technical Field

[0001] This utility model relates to the field of guide rail transmission equipment technology, and in particular to a radial positioning mechanism for an arc guide rail. Background Technology

[0002] As a core component for realizing circular motion, the arc guide rail has been widely used in automated production lines, robot joints, medical equipment, and testing instruments. In these applications, it is often necessary to precisely move a certain execution component or detection component on the equipment to a designated position on the arc guide rail.

[0003] To achieve this positioning, existing technologies employ a method of installing a drive motor on the moving part. Power is provided through the friction between the drive wheel and the guide rail, and through the meshing of gears with an additional rack. In positioning control, a simple approach is to directly calculate the displacement of the moving part by counting the number of rotations of the drive motor. This is an open-loop control method. However, in actual operation, slippage can occur between the drive wheel and the rail, and backlash errors can exist in the transmission gears. These factors can cause deviations between the actual displacement and the theoretically calculated value, and these errors will accumulate continuously, ultimately leading to low positioning accuracy and failing to meet the requirements of high-precision operations.

[0004] To overcome the accuracy deficiencies of open-loop control, the introduction of a closed-loop feedback system has become an inevitable choice. Closed-loop control requires an independent measurement system to obtain the real position of the moving part in real time and accurately. Existing technologies employ relatively complex external measurement schemes to achieve closed-loop control, such as using laser trackers and machine vision systems to monitor the position of the moving part, laying expensive optical and magnetic rulers along the entire arc guide rail, and reading the position information by a reading head on the moving part. Although these schemes can significantly improve positioning accuracy, they generally suffer from complex system structures, high equipment costs, difficult installation and debugging, and harsh requirements for the working environment, which limits their application in more situations.

[0005] Therefore, this utility model proposes a radial positioning mechanism for an arc guide rail to overcome the shortcomings of the prior art. Utility Model Content

[0006] In view of the problems in the existing radial positioning mechanism of a circular arc guide rail, such as the independent drive system and measurement system, the complex and dispersed overall structure, and the difficulty in achieving high-precision positioning, this utility model aims to provide a radial positioning mechanism for a circular arc guide rail with an improved structure that can effectively solve the above problems.

[0007] This utility model provides a radial positioning mechanism for an arc guide rail, including: a bracket, a guide frame, an adjusting block, and a gear ring; as well as an adjusting mechanism and a driving mechanism.

[0008] The adjustment mechanism and the drive mechanism are both integrated on the adjustment block.

[0009] Furthermore, the drive mechanism includes a motor and a drive gear connected to the motor output shaft, and the adjustment mechanism includes a receiving gear. The drive gear and the receiving gear are combined by simultaneously meshing with the same fixed gear ring. The drive gear actively rotates under the drive of the motor to push the adjustment block to move along the guide frame, while the receiving gear passively rolls along the gear ring to measure the moving distance when the adjustment block moves.

[0010] Preferably, the adjusting block has a placement slot, and the motor is fixed in the placement slot by bolts.

[0011] Preferably, the adjusting block is slidably connected to the guide frame via a guide block.

[0012] Preferably, the adjustment mechanism further includes a rotating shaft, with a receiving gear fixed to the top of the rotating shaft.

[0013] Preferably, the adjustment mechanism further includes a calibration seat and a bearing. The calibration seat is fixed on the adjustment block, the bearing is embedded in a preset hole on the top of the calibration seat, and the rotating shaft passes through the bearing and is supported by the bearing's rotation.

[0014] Preferably, the outer wall of the shaft is fixedly connected to the inner ring of the bearing.

[0015] Preferably, the adjustment mechanism further includes a display ring, which is mounted on the outer wall of the rotating shaft and rotates synchronously with the rotating shaft.

[0016] Preferably, the display ring has a grating structure inside, and an infrared sensor is provided on the top of the calibration seat. The infrared sensor is used to detect changes in the grating structure during rotation.

[0017] Preferably, the display ring is fitted onto the top of the calibration seat.

[0018] This utility model has the following beneficial effects:

[0019] 1. This utility model solves the problems of separation of drive and measurement systems and complex overall structure in the existing circular arc guide rail positioning device by simultaneously integrating the drive mechanism and independent displacement detection mechanism on the movable adjustment block, and making the gears of both mesh with the same fixed gear ring. It achieves the technical effect of compact structure, high degree of integration and easy installation and debugging.

[0020] 2. This utility model solves the problem of low positioning accuracy caused by transmission chain errors, gaps, and open-loop control in traditional positioning methods by setting a passively rolling receiving gear to link the internal grating structure to rotate, and using an infrared sensor to detect the rotation amount in real time to accurately calculate the displacement. This achieves the technical effect of realizing closed-loop control and effectively improving positioning accuracy and reliability. Attached Figure Description

[0021] Figure 1 This is a perspective view of a radial positioning mechanism for an arc guide rail proposed in this utility model.

[0022] Figure 2 This is a split view of the adjusting block in the radial positioning mechanism of a circular arc guide rail proposed in this utility model;

[0023] Figure 3 This is an exploded view of the motor in the radial positioning mechanism of an arc guide rail proposed in this utility model;

[0024] Figure 4 This is an exploded view of the calibration seat in the radial positioning mechanism of the arc guide rail proposed in this utility model.

[0025] Legend:

[0026] 1. Bracket; 2. Guide frame; 3. Adjustment mechanism; 31. Adjustment block; 32. Guide block; 33. Receiving gear; 34. Rotating shaft; 35. Display ring; 36. Bearing; 37. Calibration seat; 4. Drive mechanism; 41. Placement slot; 42. Motor; 43. Drive gear; 44. Gear ring. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

[0028] Example:

[0029] Please refer to Figure 1 and Figure 2The overall installation of a radial positioning mechanism for an arc-shaped guide rail begins with a basic frame consisting of a bracket 1 and a guide frame 2. The bracket 1 and guide frame 2 are first assembled and fixed, with the guide frame 2 mounted on the bracket 1, forming a circular arc-shaped motion track foundation. A fixed transmission reference is provided by a gear ring 44, which is fixedly connected to the top of the bracket 1, and the arc path of the gear ring 44 is consistent with the path of the guide frame 2, providing a unified reference for subsequent driving and measurement. The moving platform consists of an adjustment block 31, which integrates the load-bearing drive mechanism 4 and the adjustment mechanism 3. The adjustment block 31 is mounted on the top of the guide frame 2 via a sliding connection, allowing it to move along the guide frame 2. The movement follows an arc trajectory; the driving mechanism 4 consists of a motor 42 and a driving gear 43, while the adjusting mechanism 3 includes a receiving gear 33 and components such as a rotating shaft 34 and a display ring 35 linked to it; during installation, after the adjusting block 31 is installed on the top of the guide frame 2, the driving gear 43 of the driving mechanism 4 and the receiving gear 33 of the adjusting mechanism 3 both mesh with the same fixed toothed ring 44. The driving gear 43 rotates actively under the drive of the motor 42, pushing the adjusting block 31 to move, while the receiving gear 33 passively rolls along the toothed ring 44 during the movement to measure the distance moved. Finally, through the integration of driving and measuring functions, the high-precision positioning of the adjusting block 31 on the guide frame 2 is achieved.

[0030] Please refer to Figure 1 , Figure 3 and Figure 4 The adjusting block 31 has a placement groove 41. The motor 42 of the drive mechanism 4 is placed inside the placement groove 41 and fixedly connected with bolts. The output shaft of the motor 42 is connected to a drive gear 43, which meshes with a fixed gear ring 44 after installation. When positioning is required, the motor 42 is started to drive the drive gear 43 to rotate. The meshing transmission between the drive gear 43 and the gear ring 44 generates a pushing force, thereby actively driving the entire adjusting block 31 to move along the arc path of the guide frame 2. At the same time, the adjusting block 31 forms a sliding connection with the guide frame 2 through the guide block 32. The connection method limits the movement trajectory of the adjusting block 31, ensuring smooth movement. The receiving gear 33 in the adjusting mechanism 3 is rotatably mounted on the adjusting block 31 and also meshes with the gear ring 44. The installation of the receiving gear 33 is achieved through the calibration seat 37, which is fixed to the top right side of the adjusting block 31. When the driving mechanism 4 drives the adjusting block 31 to move, the receiving gear 33 will passively roll along the same gear ring 44. This design converts the linear displacement of the adjusting block 31 into the rotational motion of the receiving gear 33, providing the original mechanical signal for subsequent displacement calculation.

[0031] Please refer to Figure 4The adjustment mechanism 3 includes a rotating shaft 34, with a receiving gear 33 fixedly connected to the top of the rotating shaft 34 to directly transmit the circumferential motion of the receiving gear 33 rolling along the gear ring 44 to the rotating shaft 34. To provide stable and low-friction rotational support for the rotating shaft 34, the adjustment mechanism 3 also includes a calibration seat 37 and a bearing 36. The calibration seat 37 is fixed to the top of the adjustment block 31, and the outer ring of the bearing 36 is embedded in a preset hole on the top of the calibration seat 37. The rotating shaft 34 passes through the bearing 36 and forms a rotatable connection with it. More specifically, the outer wall of the rotating shaft 34 is fixedly connected to the inner ring of the bearing 36. When the rotating shaft 34 rotates, the relative rotation of the inner and outer rings of the bearing 36 provides support. To convert the mechanical rotation of the rotating shaft 34 into a detectable signal, the adjustment mechanism 3 further includes a display ring 35, which is mounted on the outer wall of the rotating shaft 34 so that it can rotate synchronously with the rotating shaft 34. In terms of mounting structure, the display ring 35 covers the top of the calibration seat 37, protecting the connection between the internal bearing 36 and the rotating shaft 34. To achieve accurate displacement measurement, a grating structure is integrated inside the display ring 35. At the same time, an infrared sensor is correspondingly provided on the top of the calibration seat 37. The position of the infrared sensor corresponds to the grating structure inside the display ring 35 and is used to detect the change of the grating structure as the display ring 35 rotates.

[0032] Working principle: First, install bracket 1 and guide frame 2. After installation, install guide frame 2 in the preset position. Guide frame 2 has an arc-shaped structure. Gear ring 44 is fixed on the top of bracket 1 and keeps the same path as guide frame 2. Install adjustment block 31 of adjustment mechanism 3 on the top of guide frame 2. Install calibration seat 37 on the top right side of adjustment block 31. The outer ring of bearing 36 is embedded in the preset hole on the top of calibration seat 37. Rotary shaft 34 passes through bearing 36 and is rotatably connected to the inner side of calibration seat 37. The outer wall of rotating shaft 34 is fixed to the inner ring of bearing 36. Receiving gear 33 is fixed on the top of rotating shaft 34 and meshes with gear ring 44. Display ring 35 is installed on the outer wall of rotating shaft 34 and covers the top of calibration seat 37. Adjustment block 31 is slidably connected to guide frame 2 through guide block 32, so that adjustment block 31 can move radially along guide frame 2, thus completing the assembly of adjustment mechanism 3.

[0033] Install the drive mechanism 4, place the motor 42 in the placement slot 41 opened in the adjustment block 31, fix the motor 42 with bolts, connect the output shaft of the motor 42 to the drive gear 43, adjust the position of the drive gear 43 to mesh with the gear ring 44, and complete the overall installation of the device.

[0034] During the positioning operation, the motor 42 is started, which drives the drive gear 43 to rotate. The drive gear 43 meshes with the gear ring 44, causing the adjusting block 31 to move radially along the guide frame 2. At the same time, the receiving gear 33 rolls along the gear ring 44, driving the bottom rotating shaft 34 and the display ring 35 to rotate along the calibration seat 37. The grating structure inside the display ring 35 corresponds to the infrared sensor on the top of the calibration seat 37. During rotation, the linear velocity of rotation is determined, thereby determining the moving distance of the adjusting block 31. When the adjusting block 31 moves to the target positioning point, the motor 42 is turned off, completing the positioning and realizing the positioning on the arc guide rail.

Claims

1. A radial positioning mechanism for an arc-shaped guide rail, comprising: Support (1); A guide frame (2) in the shape of an arc is mounted on the bracket (1); Adjustment block (31), which is slidably disposed on the guide frame (2); And a toothed ring (44), which is fixed to the top of the bracket (1) and is aligned with the path of the guide (2); Its features are, The radial positioning mechanism of the arc guide rail also includes an adjustment mechanism (3) and a drive mechanism (4) disposed on the adjustment block (31). The drive mechanism (4) includes a motor (42) and a drive gear (43) connected to the output shaft of the motor (42). The drive gear (43) meshes with the gear ring (44) for transmission, and is used to drive the adjusting block (31) to move along the guide frame (2). The adjustment mechanism (3) includes a receiving gear (33) and a calibration seat (37). The receiving gear (33) also meshes with the gear ring (44) and passively rolls as the adjustment block (31) moves, so as to determine the moving distance of the adjustment block (31) by measuring the rotation of the receiving gear (33) itself.

2. The radial positioning mechanism for a circular arc guide rail according to claim 1, characterized in that, The adjustment block (31) has a placement slot (41) for accommodating the motor (42), and the motor (42) is fixed in the placement slot (41) by bolts.

3. The radial positioning mechanism for a circular arc guide rail according to claim 1, characterized in that, The adjustment block (31) is slidably connected to the guide frame (2) via the guide block (32) so that the adjustment block (31) can move along the guide frame (2).

4. The radial positioning mechanism for a circular arc guide rail according to claim 1, characterized in that, The adjustment mechanism (3) also includes a rotating shaft (34), and the receiving gear (33) is fixed to the top of the rotating shaft (34).

5. The radial positioning mechanism for an arc guide rail according to claim 4, characterized in that, The adjustment mechanism (3) further includes a calibration seat (37) and a bearing (36). The calibration seat (37) is fixed on the adjustment block (31). The bearing (36) is embedded in a preset hole on the top of the calibration seat (37). The rotating shaft (34) passes through the bearing (36) and is rotatably connected.

6. The radial positioning mechanism for a circular arc guide rail according to claim 5, characterized in that, The outer wall of the shaft (34) is fixed to the inner ring of the bearing (36).

7. The radial positioning mechanism for a circular arc guide rail according to claim 4, characterized in that, The adjustment mechanism (3) also includes a display ring (35), which is mounted on the outer wall of the rotating shaft (34) and rotates synchronously with the rotating shaft (34).

8. The radial positioning mechanism for a circular arc guide rail according to claim 7, characterized in that, The display ring (35) has a grating structure inside, and the top of the calibration seat (37) is provided with an infrared sensor. The infrared sensor is used to detect the linear velocity of the grating structure when it rotates, thereby determining the moving distance of the adjustment block (31).

9. The radial positioning mechanism for a circular arc guide rail according to claim 7, characterized in that, The display ring (35) covers the top of the calibration seat (37).

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