High-precision positioning mechanism

Abstract

The utility model relates to the technical field of auxiliary detection, and discloses a high-precision positioning mechanism which comprises a servo motor, a precision speed reducer, a fixed base, a compensation sensing mechanism and a rotary supporting piece, and the compensation sensing mechanism comprises an inductor installation base, a telescopic air cylinder, a guide assembly, a blocking piece and a second bottom plate. The sensor mounting base is mounted on the fixed base through the second bottom plate, the fixed ends of the telescopic cylinder and the guide assembly are mounted on the sensor mounting base, the sliding end of the guide assembly is connected with the cylinder, the guide assembly is connected with the blocking piece, and the top of the fixed base is connected with the rotary supporting piece through the output end of the precise speed reducer. The input end of the precise speed reducer is connected with the servo motor, and the blocking piece is matched with the rotary supporting piece. According to the utility model, continuous rotation, clearance rotation and the like are realized, instant start and stop are realized, and the precision is up to 0.05 degree.

Description

Technical Field

[0001] The utility model relates to the technical field of auxiliary detection, in particular to a high-precision positioning mechanism. Background Art

[0002] When conducting signal tests on radio frequency devices such as mobile phones, PLC controllers, and Bluetooth speakers, the existing technology uses a worm gear rotation mechanism as the positioning mechanism of the signal transmitter to minimize the distance between the transmitted and received signals. However, the rotation accuracy of the worm gear rotation mechanism cannot be guaranteed, making it impossible to locate the shortest distance between signal transmissions, resulting in poor consistency and problems such as low load. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies in the above prior art and to provide a high-precision positioning mechanism.

[0004] The purpose of the utility model is achieved through the following technical solutions: a high-precision positioning mechanism includes a servo motor, a precision reducer, a fixed base, a compensation sensing mechanism and a rotating support, the compensation sensing mechanism includes a sensor mounting base, a telescopic cylinder, a guide assembly, a blocking plate and a second base plate, the sensor mounting base is installed on the fixed base through the second base plate, the fixed ends of the telescopic cylinder and the guide assembly are both installed on the sensor mounting base, the sliding end of the guide assembly is connected to the cylinder, the guide assembly is connected to the blocking plate, the top of the fixed base is connected to the rotating support through the output end of the precision reducer, the input end of the precision reducer is connected to the servo motor, and the blocking plate matches the rotating support.

[0005] A more preferred option also includes a second position sensor and a second sensing plate, the guide assembly is connected to the second sensing plate, the second position sensor is symmetrically installed on the lower side of the guide assembly, and the second position sensor matches the second sensing plate.

[0006] A better option is that the guide assembly includes a slider and a slide rail, the slide rail is installed on the sensor mounting base, the slider is slidably installed on the slide rail, the slider is connected to the blocking plate, and the slider is connected to the telescopic cylinder.

[0007] A better choice is that the sensor mounting base is provided with a cylinder fixing seat and a telescopic rod fixing seat, the fixed end of the telescopic cylinder is installed on the cylinder fixing seat, and the telescopic end of the telescopic cylinder is slidably installed on the telescopic rod fixing seat.

[0008] A better choice is that the fixed base includes a first bottom plate, a side plate, a connecting rod and a top plate, the top plate is installed on the first bottom plate through the side plate, the two adjacent side plates are connected by the connecting rod, the top plate is connected to the output end of the precision reducer, and the second bottom plate is respectively connected to the top plate, the side plate and the connecting rod.

[0009] More preferably, the precision reducer is provided with a first position sensor and a first induction plate, and the first position sensor matches the first induction plate.

[0010] A better choice is that the rotating support includes a connecting flange, a cylindrical portion, a circular baffle and a stopper, the lower end of the cylindrical portion is connected to the output end of the precision reducer, the upper end of the cylindrical portion is connected to the connecting flange, the circular baffle is installed on the cylindrical portion, the stopper is installed on the circular baffle, and the stopper matches the blocking plate.

[0011] More preferably, the circular baffle includes two semicircular baffles, the two semicircular baffles are mounted on the cylindrical portion, and the stopper is mounted on one of the two semicircular baffles.

[0012] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0013] The utility model is suitable for radio frequency testing equipment such as mobile phones, computers, and Bluetooth speakers through a servo motor, a precision reducer, a fixed base, a compensation sensor mechanism, and a rotating support. The compensation sensor mechanism can reduce the installation process and the installation error of the first position sensor, and can achieve the accuracy of circular positioning. The positioning angle range is -5° to 370°, and continuous rotation, intermittent rotation, etc. can be realized, and instantaneous start and stop are achieved with an accuracy of up to 0.05°. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of a high-precision positioning mechanism of the utility model;

[0015] Figure 2 This is a schematic diagram of a compensation sensing mechanism of a high-precision positioning mechanism of the utility model;

[0016] Figure 3 This is a schematic diagram of a compensation sensing mechanism of a high-precision positioning mechanism of the utility model;

[0017] Figure 4 This is a schematic diagram of the connection between the fixed base and the precision reducer of a high-precision positioning mechanism of the utility model;

[0018] Figure 5 This is a schematic diagram of the connection between the rotating support and the precision reducer of a high-precision positioning mechanism of the utility model;

[0019] Figure 6 This is a schematic diagram of a fixed base of a high-precision positioning mechanism of the utility model;

[0020] Figure 7 This is a schematic diagram of a rotating support member of a high-precision positioning mechanism of the present utility model;

[0021] Figure 8 This is a schematic diagram of a rotating support member of a high-precision positioning mechanism of the present utility model;

[0022] 1-servo motor; 2-precision reducer; 201-first position sensor; 202-first induction plate; 3-fixed base; 301-first bottom plate; 302-side plate; 303-connecting rod; 304-top plate; 4-compensation sensing mechanism; 401-sensor mounting base; 401a-cylinder fixing base; 401b-telescopic rod fixing base; 402-telescopic cylinder; 403-slider; 404-second position sensor; 405-second induction plate; 406-blocking plate; 407-slide rail; 408-second bottom plate; 5-rotating support; 501-connecting flange; 502-cylinder; 503-semicircular baffle; 504-block. DETAILED DESCRIPTION

[0023] The utility model object of the utility model is further described in detail below with reference to the accompanying drawings and specific embodiments. The embodiments cannot be described one by one here, but the implementation methods of the utility model are not limited to the following embodiments.

[0024] like Figure 1 、 4 As shown in Figure 5, a high-precision positioning mechanism includes a servo motor 1, a precision reducer 2, a fixed base 3, a compensation sensor mechanism 4, and a rotating support member 5. The input end of the precision reducer 2 is connected to the servo motor 1, and the output end of the precision reducer 2 is installed on the front side of the fixed base 3 and extends to the top of the fixed base 3. The output end of the precision reducer 2 is connected to the rotating support member 5, and the compensation sensor mechanism 4 is on the rear side of the fixed base 3. The compensation sensor mechanism 4 is adapted to the rotating support member 5.

[0025] The servo motor 1 can be purchased in the existing market and provides power for the rotation of the rotating support 5. The precision reducer 2 can be purchased in the existing market and is used to change the rotation speed of the servo motor 1 to meet the rotation speed requirements of the rotating support 5. The fixed base 3 plays a supporting role and is used to install the precision reducer 2, the compensation sensor mechanism 4 and the rotating support 5. The compensation sensor mechanism 4 is used to eliminate errors in the mechanical installation process or the installation error of the first position sensor 201, ensuring that the servo motor 1 does not exceed the range of -5° to 370° when searching for the origin position. The rotating support 5 plays a transmission role and is used to install a signal transmitter, which belongs to the existing technology and is used to send signals.

[0026] As shown in Figures 2 and 3 , the compensation sensing mechanism 4 includes a sensor mounting base 401, a telescopic cylinder 402, a guide assembly, a blocking plate 406, a second base plate 408, two second position sensors 404, and a second sensing plate 405. The guide assembly includes a slider 403 and a slide rail 407. The second base plate 408 is mounted on the rear side of the fixed base 3, and the sensor mounting base 401 is mounted on the second base plate 408. The slide rail 407 is mounted on the side of the sensor mounting base 401 facing away from the fixed base 3, and the slider 403 is slidably mounted on the slide rail 407. The sensor mounting base 401 is provided with a cylinder mount 401a and a telescopic rod mount 401b, which are located at the left and right ends of the slide rail 407, respectively. The fixed end of the telescopic cylinder 402 is mounted on the cylinder mount 401a, while the telescopic end of the telescopic cylinder 402 passes through the slider 403 and is mounted on the telescopic rod mount 401b, thus firmly connecting the telescopic cylinder 402 to the slider 403. A blocking plate 406 is mounted on the top of the slider 403 and mates with the stopper 504 of the rotating support 5. A second sensing plate 405 is mounted on the bottom of the slider 403 and mates with two second position sensors 404, which are located on the underside of the two ends of the slide rail 407.

[0027] The sensor mounting base 401 is used to mount the various sensors. The telescopic cylinder 402 drives the slider 403 to adjust the position of the blocking plate 406. The guide assembly guides the movement of the blocking plate 406. The blocking plate 406 limits the position of the block 504. The second base plate 408 secures the sensor mounting base. The second position sensor 404 and the second sensing plate 405 cooperate to detect the position of the blocking plate 406. The slider 403 and the slide rail 407 match to achieve directional sliding and reduce friction.

[0028] like Figure 6As shown, the fixed base 3 includes a first bottom plate 301, two side plates 302, two connecting rods 303 and a top plate 304. The bottom ends of the two side plates 302 are vertically installed on the first bottom plate 301, the front and rear ends of the two side plates 302 are connected by two connecting rods 303, and the top ends of the two side plates 302 are connected to the bottom of the top plate 304.

[0029] The first bottom plate 301 serves as a foundation to ensure that all components are on the same horizontal plane. The side plates 302 serve as supports, and the connecting rods 303 serve as a connection and reinforcement between the side plates 302. The top plate 304 is used to fix the output end of the precision reducer 2.

[0030] A first position sensor 201 is fixedly provided on the precision reducer 2 , and a first induction plate 202 is provided at the output end of the precision reducer 2 . The first position sensor 201 matches the first induction plate 202 to detect the origin reset of the precision reducer 2 .

[0031] The rotating support 5 includes a connecting flange 501, a cylindrical portion 502, two semicircular baffles 503, and a stopper 504. The lower end of the cylindrical portion 502 is connected to the output end of the precision reducer 2 to provide power for the rotation of the cylindrical portion 502. The upper end of the cylindrical portion 502 is connected to the connecting flange 501, which facilitates the installation of a signal transmitter. The two semicircular baffles 503 are mounted on the outer wall of the cylindrical portion 502, forming a circular baffle. The stopper 504 is mounted at the bottom of the circular baffle. The stopper 504 cooperates with the blocking plate 406 to fine-tune the rotation angle of the rotating support 5.

[0032] Working principle: When servo motor 1 is calibrated to its origin, the transmitter simultaneously emits a signal. Upon receiving the signal, the receiver determines the current angular offset of the rotating support based on the transmitted and received signals. Based on this angular offset, servo motor 1 then determines the rotation angle to minimize the distance between the transmitter and receiver, thereby achieving high-precision positioning of the transmitter.

[0033] The above specific implementation methods are preferred embodiments of the present invention and cannot limit the present invention. Any other changes or other equivalent replacement methods that do not deviate from the technical solution of the present invention are included in the scope of protection of the present invention.

Claims

1. A high-precision positioning mechanism, characterized in that: It includes a servo motor, a precision reducer, a fixed base, a compensation sensing mechanism and a rotating support. The compensation sensing mechanism includes a sensor mounting base, a telescopic cylinder, a guide assembly, a blocking plate and a second base plate. The sensor mounting base is installed on the fixed base through the second base plate. The fixed ends of the telescopic cylinder and the guide assembly are both installed on the sensor mounting base. The sliding end of the guide assembly is connected to the cylinder, and the guide assembly is connected to the blocking plate. The top of the fixed base is connected to the rotating support through the output end of the precision reducer, and the input end of the precision reducer is connected to the servo motor. The blocking plate matches the rotating support.

2. A high-precision positioning mechanism according to claim 1, characterized in that: It also includes a second position sensor and a second induction plate. The guide assembly is connected to the second induction plate. The second position sensor is symmetrically installed on the lower side of the guide assembly. The second position sensor matches the second induction plate.

3. The high-precision positioning mechanism according to claim 1, characterized in that: The guide assembly includes a slider and a slide rail, the slide rail is installed on the sensor mounting base, the slider is slidably installed on the slide rail, the slider is connected to the blocking piece, and the slider is connected to the telescopic cylinder.

4. The high-precision positioning mechanism according to claim 1, characterized in that: The sensor mounting base is provided with a cylinder fixing seat and a telescopic rod fixing seat. The fixed end of the telescopic cylinder is mounted on the cylinder fixing seat, and the telescopic end of the telescopic cylinder is slidably mounted on the telescopic rod fixing seat.

5. The high-precision positioning mechanism according to claim 1, characterized in that: The fixed base includes a first bottom plate, a side plate, a connecting rod and a top plate. The top plate is mounted on the first bottom plate through the side plate. Two adjacent side plates are connected by the connecting rod. The top plate is connected to the output end of the precision reducer. The second bottom plate is respectively connected to the top plate, the side plate and the connecting rod.

6. The high-precision positioning mechanism according to claim 1, characterized in that: The precision reducer is provided with a first position sensor and a first induction plate, and the first position sensor matches the first induction plate.

7. The high-precision positioning mechanism according to claim 1, characterized in that: The rotating support member includes a connecting flange, a cylindrical portion, a circular baffle and a stopper. The lower end of the cylindrical portion is connected to the output end of the precision reducer, and the upper end of the cylindrical portion is connected to the connecting flange. The circular baffle is installed on the cylindrical portion, and the stopper is installed on the circular baffle. The stopper matches the blocking piece.

8. A high-precision positioning mechanism according to claim 7, characterized in that: The circular baffle includes two semicircular baffles, the two semicircular baffles are installed on the cylindrical portion, and the stopper is installed on one of the two semicircular baffles.

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