Screw detection mechanism

Abstract

The utility model belongs to the technical field of lens detection, and discloses a screw detection mechanism, which comprises a bearing assembly, a guide rod, an elastic sheet, a tension spring and a laser displacement sensor, and is characterized in that the bearing assembly is used for bearing a motor; the guide rod is rotationally installed on the bearing assembly and fixedly sleeved with a first clamping block and a second clamping block. The elastic piece is fixedly installed on the first clamping block and used for pressing a screw of the motor. One end of the tension spring is connected to the second clamping block, and the other end of the tension spring is connected to the bearing assembly. The laser displacement sensor is located on one side of the bearing assembly and used for detecting the jitter amplitude of the elastic piece. The screw detection mechanism provided by the utility model is simple in structure and low in cost, and the detection precision meets the requirement.

Description

Technical Field

[0001] This utility model relates to the field of lens inspection technology, and in particular to a screw inspection mechanism. Background Technology

[0002] In zoom lenses, the output end of the motor is equipped with a screw, which is connected to a movable lens group. The motor drives the movable lens group through the screw, thereby achieving zoom. The transmission accuracy of the screw plays a crucial role in the image quality during the zoom process. Existing detection devices, such as application number 202323588410.6, entitled "Motor Shake Detection Device," include a first mounting mechanism, a second mounting mechanism, and a detection mechanism. Test paper is mounted on the first mounting mechanism. The second mounting mechanism includes a mounting base, a rotating base, and a motor mounting component. The rotating base is rotatably and adjustablely fixed on the mounting base. The motor mounting component is fixedly connected to the rotating base, and the motor is mounted on the motor mounting component. The test paper is in contact with the motor screw. When the motor screw rotates, the detection mechanism detects the shake amplitude of the test paper and uses the shake amplitude of the test paper to provide feedback on the shake amplitude of the motor screw.

[0003] However, the current detection device has a relatively complex structure and high cost. Utility Model Content

[0004] The purpose of this invention is to provide a screw detection mechanism that simplifies the structure and reduces costs.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] Screw testing mechanism, including:

[0007] The support assembly is used to support the motor;

[0008] A guide rod is rotatably mounted on the bearing assembly, and the guide rod is fixedly sleeved with a first clamping block and a second clamping block;

[0009] A spring sheet is fixedly installed on the first clamping block, and the spring sheet is used to press the screw of the motor;

[0010] A tension spring, one end of which is connected to the second clamping block, and the other end of which is connected to the bearing assembly;

[0011] A laser displacement sensor is located on one side of the support assembly, and the laser displacement sensor is used to detect the jitter amplitude of the spring.

[0012] As an optional technical solution, there are two second clamping blocks, which are located on both sides of the first clamping block, and each second clamping block is connected to the bearing component by a tension spring.

[0013] As an optional technical solution, the screw detection mechanism further includes a base plate, a support plate, and a slide rail. The support plate is fixedly installed on the base plate, the laser displacement sensor is fixedly installed on the support plate, the slide rail is fixedly installed on the base plate and located on one side of the support plate, a slider is slidably installed on the slide rail, and the bearing component is fixedly installed on the slider.

[0014] As an optional technical solution, the front end of the slide rail is provided with a front action rod, and the rear end of the slide rail is provided with a rear action rod. The front action rod and the rear action rod respectively push against the bearing component from the front and rear ends of the slide rail.

[0015] As an optional technical solution, the front end of the slide rail is provided with a front mounting block, the front mounting block is provided with a threaded hole, the front actuating rod is provided with an external thread, and the front actuating rod is rotatably mounted in the threaded hole of the front mounting block; the rear end of the slide rail is provided with a rear mounting block, the rear mounting block is provided with a threaded hole, the rear actuating rod is provided with an external thread, and the rear actuating rod is rotatably mounted in the threaded hole of the rear mounting block.

[0016] As an optional technical solution, the bearing assembly is provided with a front positioning hole facing the front actuating rod and a rear positioning hole facing the rear actuating rod.

[0017] As an optional technical solution, the carrier component includes:

[0018] A first bearing seat, wherein the guide rod is rotatably mounted on the first bearing seat, and one end of the tension spring is connected to the first bearing seat;

[0019] The second support is fixedly installed on the first support. The second support is provided with a socket, through which a pin is inserted. The pin is used to supply power to the motor.

[0020] The third support is fixedly installed on the second support.

[0021] As an optional technical solution, one end of the first clamping block is provided with a first clamping groove, the guide rod passes through the first clamping groove, and the two side walls of the first clamping groove are locked with a first fastener so that the two side walls of the first clamping groove clamp the guide rod.

[0022] As an optional technical solution, the other end of the first clamping block is provided with a second clamping groove, one end of the spring piece is provided with a slot, the end of the spring piece with the slot extends into the second clamping groove, the two side walls of the second clamping groove are locked with a second fastener, and the second fastener passes through the slot.

[0023] As an optional technical solution, one end of the second clamping block is provided with a third clamping groove, the guide rod passes through the third clamping groove, and the two side walls of the third clamping groove are locked with a third fastener so that the two side walls of the third clamping groove clamp the guide rod.

[0024] The beneficial effects of this utility model are:

[0025] The screw detection mechanism provided by this utility model includes a bearing assembly, a guide rod, a spring, a tension spring, and a laser displacement sensor. The bearing assembly is used to support the motor. The guide rod is rotatably mounted on the bearing assembly, and a first clamping block and a second clamping block are fixedly sleeved on the guide rod. The spring is fixedly mounted on the first clamping block and is used to press the screw of the motor. One end of the tension spring is connected to the second clamping block, and the other end of the tension spring is connected to the bearing assembly. The laser displacement sensor is located on one side of the bearing assembly and is used to detect the vibration amplitude of the spring.

[0026] A tension spring applies tension to the second clamping block, ensuring that the spring plate is always pressed tightly against the motor screw, preventing separation between the spring plate and the screw. A laser displacement sensor detects the vibration amplitude of the spring plate, which in turn reflects the vibration amplitude of the screw. The screw detection mechanism provided by this invention has a simple structure, low cost, and meets the required detection accuracy. Attached Figure Description

[0027] Figure 1 This is a first-view structural schematic diagram of the screw detection mechanism of this utility model;

[0028] Figure 2 This is a partial structural schematic diagram of the screw detection mechanism of this utility model from a second perspective;

[0029] Figure 3 This is a partial structural schematic diagram of the screw detection mechanism of this utility model from a third-view perspective;

[0030] Figure 4 This is a schematic diagram of the structure of the first clamping block and the spring sheet of this utility model;

[0031] Figure 5 This is a schematic diagram of the structure of the second clamping block of this utility model.

[0032] In the picture:

[0033] 1. Bearing assembly; 101. First bearing seat; 1011. Front positioning hole; 1012. Rear positioning hole; 102. Second bearing seat; 1021. Insertion hole; 103. Third bearing seat; 2. Guide rod; 3. First clamping block; 31. First clamping groove; 32. Second clamping groove; 4. Second clamping block; 41. Third clamping groove; 5. Spring; 51. Slot; 6. Tension spring; 7. Laser displacement sensor; 8. Base plate; 9. Support plate; 10. Slide rail; 11. Slider; 12. Front actuating rod; 13. Rear actuating rod; 14. Front mounting block; 15. Rear mounting block. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0035] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0038] like Figures 1 to 5 As shown, this embodiment provides a screw detection mechanism, which includes a bearing assembly 1, a guide rod 2, a spring 5, a tension spring 6, and a laser displacement sensor 7. The bearing assembly 1 is used to support the motor; the guide rod 2 is rotatably mounted on the bearing assembly 1, and a first clamping block 3 and a second clamping block 4 are fixedly sleeved on the guide rod 2; the spring 5 is fixedly mounted on the first clamping block 3, and the spring 5 is used to press the screw of the motor; one end of the tension spring 6 is connected to the second clamping block 4, and the other end of the tension spring 6 is connected to the bearing assembly 1; the laser displacement sensor 7 is located on one side of the bearing assembly 1, and the laser displacement sensor 7 is used to detect the vibration amplitude of the spring 5.

[0039] The tension spring 6 applies tension to the second clamping block 4, ensuring that the spring piece 5 is always pressed tightly against the motor screw, preventing separation between the spring piece 5 and the screw. The laser displacement sensor 7 detects the vibration amplitude of the spring piece 5, reflecting the vibration amplitude of the screw. The screw detection mechanism provided in this embodiment has a simple structure, low cost, and meets the required detection accuracy.

[0040] Specifically, during testing, the motor is started, and the motor drives the screw to rotate. When the screw rotates to the trough position, the tension spring 6 drives the guide rod 2 through the second clamping block 4, and the guide rod 2 drives the spring piece 5 through the first clamping block 3, ensuring that the spring piece 5 can be pressed against the trough position of the screw. Similarly, when the screw rotates to the crest position, the spring piece 5 can be pressed against the crest position of the screw.

[0041] Optionally, two second clamping blocks 4 are provided, with the two second clamping blocks 4 located on both sides of the first clamping block 3, and each second clamping block 4 is connected to the bearing assembly 1 by a tension spring 6. The two tension springs 6 simultaneously apply tension to the guide rod 2 to ensure that the spring piece 5 can be pressed tightly against the screw.

[0042] Optionally, the screw detection mechanism also includes a base plate 8, a support plate 9, and a slide rail 10. The support plate 9 is fixedly installed on the base plate 8, the laser displacement sensor 7 is fixedly installed on the support plate 9, the slide rail 10 is fixedly installed on the base plate 8 and located on one side of the support plate 9, and a slider 11 is slidably installed on the slide rail 10. The bearing component 1 is fixedly installed on the slider 11.

[0043] The support component 1 can slide along the extension direction of the slide rail 10 so that the screw can be aligned with the laser displacement sensor 7; when it is necessary to detect different positions of the screw, the position to be detected of the screw can also be aligned with the laser displacement sensor 7 by moving the support component 1.

[0044] Optionally, the front end of the slide rail 10 is provided with a front actuating rod 12, and the rear end of the slide rail 10 is provided with a rear actuating rod 13. The front actuating rod 12 and the rear actuating rod 13 push against the bearing assembly 1 from the front and rear ends of the slide rail 10 respectively to position the bearing assembly 1 and prevent the bearing assembly 1 from driving the motor to move during the detection process.

[0045] Optionally, the front end of the slide rail 10 is provided with a front mounting block 14, the front mounting block 14 is provided with a threaded hole, the front actuating rod 12 is provided with an external thread, the front actuating rod 12 is rotatably mounted in the threaded hole of the front mounting block 14, the rear end of the slide rail 10 is provided with a rear mounting block 15, the rear mounting block 15 is provided with a threaded hole, the rear actuating rod 13 is provided with an external thread, the rear actuating rod 13 is rotatably mounted in the threaded hole of the rear mounting block 15.

[0046] When it is necessary to move the load-bearing assembly 1 in the direction from the front mounting block 14 to the rear mounting block 15, the rear actuating rod 13 is moved away from the load-bearing assembly 1, while the front actuating rod 12 pushes the load-bearing assembly 1 closer to the rear actuating rod 13. Similarly, when it is necessary to move the load-bearing assembly 1 in the direction from the rear mounting block 15 to the front mounting block 14, the front actuating rod 12 is moved away from the load-bearing assembly 1, while the rear actuating rod 13 pushes the load-bearing assembly 1 closer to the front actuating rod 12.

[0047] Optionally, the bearing assembly 1 is provided with a front positioning hole 1011 facing the front actuating rod 12 and a rear positioning hole 1012 facing the rear actuating rod 13. One end of the front actuating rod 12 extends into the front positioning hole 1011, and one end of the rear actuating rod 13 extends into the rear positioning hole 1012 to ensure the stability of the transmission.

[0048] Optionally, the support assembly 1 includes a first support seat 101, a second support seat 102, and a third support seat 103. The guide rod 2 is rotatably mounted on the first support seat 101, and one end of the tension spring 6 is connected to the first support seat 101. The second support seat 102 is fixedly mounted on the first support seat 101. The second support seat 102 is provided with a socket 1021 through which a pin is inserted. The pin is used to supply power to the motor. The third support seat 103 is fixedly mounted on the second support seat 102.

[0049] The first support 101 is provided with a pin, one end of the tension spring 6 is connected to the pin, and the other end of the tension spring 6 is connected to the second clamp 4. The pin is an existing product and is not shown in the attached drawing. The motor is fixedly installed on the third support 103 and then electrically connected to the pin. The pin supplies power to the motor. The pin is an existing product and is not shown in the attached drawing.

[0050] Optionally, one end of the first clamping block 3 is provided with a first clamping groove 31, and the guide rod 2 passes through the first clamping groove 31. The two side walls of the first clamping groove 31 are locked with a first fastener so that the two side walls of the first clamping groove 31 clamp the guide rod 2.

[0051] Both side walls of the first clamping groove 31 are provided with through holes. When the first clamping block 3 slides on the guide rod 2 to a preset position, the first fastener passes through the through holes of the two side walls, thereby locking the two side walls and stopping the first clamping block 3 from sliding. The end of the first clamping groove 31 away from the groove opening is a circular groove, and the guide rod 2 is located in the circular groove. The first fastener includes a first bolt and a first nut. The first bolt and the first nut are existing products and are not shown in the attached drawings.

[0052] Optionally, the other end of the first clamping block 3 is provided with a second clamping groove 32, and one end of the spring piece 5 is provided with a slot 51. The end of the spring piece 5 with the slot 51 extends into the second clamping groove 32. The two side walls of the second clamping groove 32 are locked with a second fastener, and the second fastener passes through the slot 51.

[0053] Both side walls of the second clamping groove 32 are provided with through holes. When it is necessary to replace the spring piece 5, loosen the second fastener, insert the end of the spring piece 5 with the slot 51 into the second clamping groove 32, adjust the insertion depth of the spring piece 5 as needed, and then pass the second fastener through the through holes of the two side walls and the slot 51 of the spring piece 5 to clamp the spring piece 5 between the two side walls. The second fastener includes a second bolt and a second nut. The second bolt and the second nut are existing products and are not shown in the attached drawings.

[0054] Optionally, one end of the second clamping block 4 is provided with a third clamping groove 41, through which the guide rod 2 passes. The two side walls of the third clamping groove 41 are locked with a third fastener so that the two side walls of the third clamping groove 41 clamp the guide rod 2.

[0055] Both side walls of the third clamping groove 41 are provided with through holes. When the second clamping block 4 slides on the guide rod 2 to a preset position, the third fastener passes through the through holes of the two side walls to lock the two side walls, and the second clamping block 4 stops sliding. The end of the third clamping groove 41 away from the groove opening is a circular groove, and the guide rod 2 is located in the circular groove. The third fastener includes a third bolt and a third nut. The third bolt and the third nut are existing products and are not shown in the attached drawings.

[0056] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A screw detection mechanism, characterized in that, include: Support assembly (1) for supporting the motor; The guide rod (2) is rotatably mounted on the bearing assembly (1), and the guide rod (2) is fixedly sleeved with the first clamping block (3) and the second clamping block (4); A spring (5) is fixedly installed on the first clamping block (3), and the spring (5) is used to press the screw of the motor; A tension spring (6), one end of which is connected to the second clamping block (4), and the other end of which is connected to the bearing assembly (1); A laser displacement sensor (7) is located on one side of the support assembly (1) and is used to detect the jitter amplitude of the spring (5).

2. The screw detection mechanism according to claim 1, characterized in that, There are two second clamping blocks (4), which are located on both sides of the first clamping block (3). Each second clamping block (4) is connected to the bearing assembly (1) by a tension spring (6).

3. The screw detection mechanism according to claim 1, characterized in that, The screw detection mechanism also includes a base plate (8), a support plate (9), and a slide rail (10). The support plate (9) is fixedly installed on the base plate (8), the laser displacement sensor (7) is fixedly installed on the support plate (9), the slide rail (10) is fixedly installed on the base plate (8) and located on one side of the support plate (9), a slider (11) is slidably installed on the slide rail (10), and the bearing component (1) is fixedly installed on the slider (11).

4. The screw detection mechanism according to claim 3, characterized in that, The slide rail (10) has a front actuating rod (12) at its front end and a rear actuating rod (13) at its rear end. The front actuating rod (12) and the rear actuating rod (13) push against the bearing assembly (1) from the front and rear ends of the slide rail (10), respectively.

5. The screw detection mechanism according to claim 4, characterized in that, The slide rail (10) has a front mounting block (14) at its front end, the front mounting block (14) has a threaded hole, the front actuating rod (12) has an external thread, and the front actuating rod (12) is rotatably mounted in the threaded hole of the front mounting block (14). The slide rail (10) has a rear mounting block (15) at its rear end, the rear mounting block (15) has a threaded hole, the rear actuating rod (13) has an external thread, and the rear actuating rod (13) is rotatably mounted in the threaded hole of the rear mounting block (15).

6. The screw detection mechanism according to claim 5, characterized in that, The bearing assembly (1) is provided with a front positioning hole (1011) facing the front action rod (12) and a rear positioning hole (1012) facing the rear action rod (13).

7. The screw detection mechanism according to claim 1, characterized in that, The carrier component (1) includes: The first bearing seat (101) is provided, the guide rod (2) is rotatably mounted on the first bearing seat (101), and one end of the tension spring (6) is connected to the first bearing seat (101); The second support (102) is fixedly installed on the first support (101). The second support (102) is provided with a socket (1021) through which a pin is inserted. The pin is used to supply power to the motor. The third support (103) is fixedly installed on the second support (102).

8. The screw detection mechanism according to claim 1, characterized in that, One end of the first clamping block (3) is provided with a first clamping groove (31), and the guide rod (2) passes through the first clamping groove (31). The two side walls of the first clamping groove (31) are locked with a first fastener so that the two side walls of the first clamping groove (31) clamp the guide rod (2).

9. The screw detection mechanism according to claim 8, characterized in that, The other end of the first clamping block (3) is provided with a second clamping groove (32), and one end of the spring piece (5) is provided with a slot (51). The end of the spring piece (5) with the slot (51) extends into the second clamping groove (32). The two side walls of the second clamping groove (32) are locked with a second fastener, and the second fastener passes through the slot (51).

10. The screw detection mechanism according to claim 1, characterized in that, The second clamping block (4) has a third clamping groove (41) at one end, and the guide rod (2) passes through the third clamping groove (41). The two side walls of the third clamping groove (41) are locked with a third fastener so that the two side walls of the third clamping groove (41) clamp the guide rod (2).

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