Zoom transmission structure for optical detection equipment

Abstract

The invention discloses a zoom transmission structure for optical detection equipment. The zoom transmission structure used for the optical detection equipment comprises a bottom plate, and the bottom plate is provided with a zoom mechanism and a driving mechanism; the zooming mechanism comprises a main guide rail installed on the bottom plate, a zooming sliding table is installed on the main guide rail in a sliding mode, an isolation hood is fixedly installed on the bottom plate, an installation hole is formed in the isolation hood, and an installation seam is formed in the isolation hood; and the driving mechanism is arranged outside the isolation cover and is used for driving the zooming sliding table to move. According to the zoom transmission structure for the optical detection equipment, the bottom plate, the zoom mechanism and the driving mechanism are arranged, the driving mechanism and the optical element are isolated for use through the isolation cover, pollution of the driving mechanism to the optical element can be avoided, and then improvement of the precision of an optical zoom system is facilitated, and the service life of the optical zoom system is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of optical detection equipment, and in particular to a zoom drive structure for an optical detection equipment. Background Art

[0002] During the development of high-precision optical detection equipment, due to different detection processes, different requirements for the optical system in terms of field of view and magnification are proposed, that is, a corresponding zoom system is required, and the imaging of the optical system should be clear and accurate during the zoom process. This requires that the zoom mechanism be coaxial with the optical axis during movement, accurately positioned, stable in place, and the entire lens group have a good sealing space and cleanliness.

[0003] Generally, the structural form for zoom drive is that the bottom plate serves as the bearing base, the guide rail is for guiding, the ball screw is for driving, and the stepping motor is for driving. Among them, the ball screw and the stepping motor are close to the zoom optical axis, and are prone to contaminating the optical components, affecting the system accuracy and service life.

[0004] Therefore, it is necessary to provide a zoom drive structure for an optical detection equipment to solve the above technical problems. Summary of the Invention

[0005] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a zoom drive structure for an optical detection equipment, which is beneficial to improving the accuracy of the optical zoom system.

[0006] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0007] A zoom drive structure for an optical detection equipment includes: a bottom plate, on which a zoom mechanism and a drive mechanism are provided. The zoom mechanism includes a main guide rail installed on the bottom plate, a zoom slide is slidably installed on the main guide rail, an isolation cover is fixedly installed on the bottom plate, the isolation cover covers the main guide rail and the zoom slide, an installation hole is provided on the isolation cover, the drive mechanism is arranged outside the isolation cover and is used to drive the zoom slide to move, and an installation slot is provided on the isolation cover.

[0008] Preferably, the drive mechanism includes a secondary guide rail fixedly installed on the bottom plate, a drive slide is slidably installed on the secondary guide rail, a ball screw is rotatably installed on the bottom plate, the ball screw is connected to the drive slide, a stepping motor is fixedly installed on the bottom plate, the stepping motor is connected to one end of the ball screw, a drive steel sheet is installed on one side of the drive slide, and one end of the drive steel sheet passes through the installation slot and is connected to the zoom slide.

[0009] Preferably, the ball screw adopts a zero-clearance ball screw.

[0010] Preferably, a slider is slidably installed in the installation seam, the driving steel sheet is fixedly connected to the slider, and sealing plates are installed on both sides of the slider to seal the inner and outer sides of the installation seam through the sealing plates.

[0011] Preferably, clamping grooves are formed at both the top and bottom of the slider.

[0012] Preferably, a first sealing ring and a second sealing ring are installed on the isolation cover.

[0013] Preferably, a through hole is formed in the slider, and the driving steel sheet passes through the through hole.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] (1) By providing a bottom plate, a zoom mechanism and a driving mechanism, and using the isolation cover to isolate the driving mechanism from the optical element, the present invention can avoid the pollution of the driving mechanism to the optical element, and thus is beneficial to improving the accuracy and service life of the optical zoom system;

[0016] (2) By providing a slider and installing U-shaped sealing plates on both sides of the slider, the present invention can conveniently seal the installation seam, which is beneficial to further improving the accuracy and service life of the optical zoom system;

[0017] (3) By forming clamping grooves at the top and bottom of the slider, the present invention can improve the sealing between the slider and the isolation cover, which is beneficial to further improving the accuracy and service life of the optical zoom system;

[0018] (4) By installing a first sealing ring and a second sealing ring on the isolation cover, the present invention can improve the sealing performance of the isolation cover, and thus is beneficial to further improving the accuracy and service life of the optical zoom system;

[0019] (5) By forming a through hole in the slider, the present invention can facilitate the sealed connection between the driving steel sheet and the slider. Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of a zoom transmission structure for an optical detection device provided by the present invention;

[0021] Figure 2 is Figure 1 a perspective structural diagram of the zoom transmission structure for an optical detection device shown;

[0022] Figure 3 is Figure 1 a schematic installation structure diagram of a driving steel sheet in the zoom transmission structure for an optical detection device shown;

[0023] Figure 4 is Figure 1Schematic diagram of the connection structure between the slider and the sealing plate in the zoom drive structure for an optical detection device as shown;

[0024] Figure 5 is Figure 4 The enlarged structure schematic diagram of part A in

[0025] Among them, the names corresponding to the reference numerals are: 1 - bottom plate, 2 - main guide rail, 3 - zoom slide table, 4 - isolation cover, 5 - mounting hole, 6 - sub - guide rail, 7 - drive slide table, 8 - stepping motor, 9 - drive steel sheet, 10 - mounting slot, 11 - sealing plate, 12 - through hole, 13 - card slot, 14 - first sealing ring, 15 - ball screw, 16 - slider. Specific implementation mode

[0026] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. The implementation modes of the present invention include but are not limited to the following embodiments.

[0027] Embodiment 1:

[0028] Such as Figures 1-5As shown in the figure, the zoom drive structure for an optical detection device provided by the present invention includes: a base plate 1, on which a zoom mechanism and a drive mechanism are provided. The zoom mechanism includes a main guide rail 2 installed on the base plate 1, and a zoom slide 3 is slidably installed on the main guide rail 2. An isolation cover 4 is fixedly installed on the base plate 1, and the isolation cover 4 covers the main guide rail 2 and the zoom slide 3. An installation hole 5 is provided on the isolation cover 4, and corresponding lenses are installed on the installation hole 5 and the zoom slide 3. The zoom slide 3 moves along the main guide rail 2 to adjust the distance between the lenses to achieve zooming. The drive mechanism is arranged outside the isolation cover 4 and includes a secondary guide rail 6 fixedly installed on the base plate 1. The secondary guide rail 6 is arranged parallel to the main guide rail 2, and a drive slide 7 is slidably installed on the secondary guide rail 6. A ball screw 15 is rotatably installed on the base plate 1. The ball screw 15 adopts a zero-clearance ball screw to reduce the transmission error and improve the transmission accuracy. The ball screw 15 is connected to the drive slide 7 through a screw-nut pair. A stepping motor 8 is fixedly installed on the base plate 1, and the output shaft of the stepping motor 8 is connected to one end of the ball screw 15 through a coupling. Thus, the stepping motor 8 can drive the ball screw 15 to rotate. The rotation of the ball screw 15 drives the drive slide 7 to move along the secondary guide rail 6. A drive steel sheet 9 is installed between the drive slide 7 and the zoom slide 3. The thickness of the drive steel sheet 9 is 0.6 - 1.2 mm, and it is made of stainless steel. Its width and length are designed according to actual needs. An installation slot 10 is provided on the isolation cover 4, and the drive steel sheet 9 passes through the installation slot 10. The movement of the drive slide 7 drives the drive steel sheet 9 to move in the installation slot 10, and the zoom slide 3 at the other end of the drive steel sheet 9 is driven by the drive steel sheet 9, so that the zoom slide 3 moves along the main guide rail 2. During use, corresponding types and specifications of lenses are installed on the installation hole 5 and the zoom slide 3. By controlling the forward / reverse rotation of the stepping motor 8 through a controller, the ball screw 15 is driven to rotate. The rotation of the ball screw 15 drives the drive slide 7 to move along the secondary guide rail 6. The movement of the drive slide 7 drives the drive steel sheet 9 to move in the installation slot 10, and the zoom slide 3 at the other end of the drive steel sheet 9 is driven by the drive steel sheet 9, so that the zoom slide 3 moves along the main guide rail 2 to adjust the distance between the lenses to achieve zooming. In this kind of zoom drive structure, the drive mechanism and the lenses used for zooming are isolated by the isolation cover 4, which can avoid the pollution of the optical elements by the drive mechanism, such as evaporated oil stains and generated dust, and thus can be beneficial to improving the accuracy and service life of the optical zoom system. It should be noted that when this kind of zoom structure is used in an optical detection device, it has high accuracy.

[0029] By providing the base plate 1, the zoom mechanism and the drive mechanism, and using the isolation cover 4 to isolate the drive mechanism from the optical elements, the pollution of the optical elements by the drive mechanism can be avoided, which is beneficial to improving the accuracy and service life of the optical zoom system.

[0030] Embodiment 2:

[0031] As Figures 3-5 shown, in this embodiment, a slider 16 is slidably installed in the installation seam 10. The driving steel sheet 9 passes through the slider 16 and is fixedly connected thereto. U-shaped sealing plates 11 are installed on both sides of the slider 16. Both sides of the sealing plate 11 are respectively arranged on the inner and outer sides of the installation seam 10. Specifically, one end of the sealing plate 11 penetrates through the isolation cover 4 and is fixedly connected to the inner side of the slider 16, and the other end is located outside the isolation cover 4 and is directly fixedly connected to the outer side of the slider 16. By using both sides of the sealing plate 11 to seal most of the area of the installation seam 11, it is possible to effectively reduce the entry of external debris and dust into the isolation cover 4 through the installation seam 10, thereby improving the contamination of the optical elements in the isolation cover 4 and further improving the accuracy and service life of the optical zoom system.

[0032] By providing the slider 16 and installing U-shaped sealing plates 11 on both sides of the slider 16, it is possible to conveniently seal the installation seam 11, which is beneficial to further improving the accuracy and service life of the optical zoom system.

[0033] Embodiment 3:

[0034] As Figure 5 shown, in this embodiment, clamping grooves 13 are provided at both the top and bottom of the slider 16. The width of the clamping groove 13 is greater than the wall thickness of the isolation cover 4. Both sides of the clamping groove 13 are respectively clamped on the inner wall and the outer wall of the isolation cover. The width of the clamping groove 13 is the same as the inner distance between the two side edges of the sealing plate 11, so that it is difficult for dust to pass through the gap between the slider 16 and the installation seam 10, which is beneficial to improving the sealing performance of the isolation cover 4 and further beneficial to the accuracy and service life of the optical zoom system.

[0035] By providing the clamping grooves 13 at the top and bottom of the slider 16, it is beneficial to improve the sealing between the slider 16 and the isolation cover 4, which is beneficial to the accuracy and service life of the optical zoom system.

[0036] Embodiment 4:

[0037] As Figure 3 shown, a first sealing ring 14 is installed at the penetration of the isolation cover 4 through the sealing plate 11, so that the sealing between the sealing plate 11 and the isolation cover 4 is achieved at this position, which is beneficial to improving the sealing performance of the isolation cover 4 and further beneficial to improving the accuracy and service life of the optical zoom system.

[0038] By installing the first sealing ring 14 on the isolation cover 4, it is possible to improve the sealing performance of the isolation cover 4 and further beneficial to the accuracy and service life of the optical zoom system.

[0039] Embodiment 5:

[0040] In this embodiment, a second sealing ring is installed on the outer side of the isolation cover 4 along the position of the installation seam 10. The second sealing ring is arranged around the installation seam 10, and the gap between the isolation cover 4 and the sealing plate 11 is sealed through the second sealing ring 10, which is beneficial to improving the sealing performance of the isolation cover 4, and further beneficial to improving the accuracy and service life of the optical zoom system.

[0041] By installing the second sealing ring on the outer side of the isolation cover 4, it is beneficial to improve the sealing performance of the isolation cover 4, and further beneficial to improving the accuracy and service life of the optical zoom system.

[0042] Embodiment 6:

[0043] As shown in FIG. 5, a through hole 12 is formed in the slider 16, and the driving steel sheet 9 passes through the through hole 12 and is fixed and sealed with glue.

[0044] By forming the through hole 12 in the slider 16, it is convenient to seal and connect the driving steel sheet 9 and the slider 16.

[0045] The assembly process of this transmission structure is as follows: The main guide rail 2 is fixed on the bottom plate 1, the zoom slide 3 is installed on the main guide rail 2, then the auxiliary guide rail 6 is adjusted to be parallel to the main guide rail 2 and fixed on the bottom plate 1, the nut of the zero-clearance ball screw 15 is connected to the driving slide 7, the zero-clearance ball screw 15 is connected to the screw fixed support seat and the screw auxiliary support seat, the screw fixed support seat is fixedly installed with the screw and the motor fixed mounting seat, the screw auxiliary support seat is connected to the screw auxiliary support mounting seat, then the isolation cover 4 is fixed on the bottom plate 1, and the sealing cover plate at the top of the isolation cover 4 is removed to facilitate the subsequent installation of the driving steel sheet 9. The driving steel sheet 9 is used to pass through the slider 16 in the installation seam 10 to connect the zoom slide and the driving slide together. The screw is adjusted to be parallel to the guide rail, and the motor fixed mounting seat and the screw auxiliary support mounting seat are connected to the bottom 1. The stepping motor 8 is installed on the screw and the motor fixed mounting seat, and the zero-clearance ball screw 16 and the stepping motor 8 are connected together using a coupling. Finally, the sealing cover plate is reinstalled on the top of the isolation cover 4.

[0046] Working principle: When in use, lenses of corresponding types and specifications are installed in the mounting holes 5 and the zoom slide 3. By controlling the forward / reverse rotation of the stepper motor 8 through the controller, the ball screw 15 is driven to rotate. The rotation of the ball screw 15 drives the drive slide 7 to move along the secondary guide rail 6. The movement of the drive slide 7 drives the drive steel sheet 9 to move within the mounting slot 10. The zoom slide 3 at the other end of the drive steel sheet 9 is driven by the drive steel sheet 9, so that the zoom slide 3 moves along the main guide rail 2, adjusting the distance between the lenses to achieve zoom. For this kind of zoom transmission structure, the driving mechanism is isolated from the lenses used for zoom through the isolation cover 4, which can avoid the pollution of the driving mechanism to the optical elements, such as evaporated oil stains and generated dust, and thus can help improve the accuracy and service life of the optical zoom system.

Claims

1. A zoom transmission structure for optical detection equipment, characterized in that: include: A bottom plate (1), wherein a zoom mechanism and a driving mechanism are provided on the bottom plate (1); The zoom mechanism comprises a main rail (2) mounted on the base plate (1), a zoom slide (3) being slidably mounted on the main rail (2), an isolation cover (4) being fixedly mounted on the base plate (1), a mounting hole (5) being formed on the isolation cover (4), and a mounting slit (10) being formed on the isolation cover (4); The driving mechanism is arranged outside the isolation cover (4) and is used to drive the zoom slide (3) to move.

2. The zoom transmission structure for optical detection equipment according to claim 1, characterized in that: The driving mechanism comprises a secondary guide rail (6) fixedly mounted on the base plate (1), a driving slide (7) being slidably mounted on the secondary guide rail (6), a ball screw (15) being rotatably mounted on the base plate (1), the ball screw (15) being connected to the driving slide (7), a stepping motor (8) being fixedly mounted on the base plate (1), the stepping motor (8) being connected to one end of the ball screw (15), a driving steel sheet (9) being mounted on one side of the driving slide (7), one end of the driving steel sheet (9) passing through the mounting slit (10) and being connected to the zoom slide (3).

3. The zoom transmission structure for optical detection equipment according to claim 2, characterized in that: The ball screw (15) adopts a zero-clearance ball screw (15).

4. The zoom transmission structure for optical detection equipment according to claim 2, characterized in that: A slider (16) is slidably mounted in the installation slot (10), the driving steel sheet (9) is fixedly connected to the slider (16), and sealing plates (11) are mounted on both sides of the slider (16), and the inner and outer sides of the installation slot (10) are sealed by the sealing plates (11).

5. The zoom transmission structure for optical detection equipment according to claim 4, characterized in that: The top and bottom of the sliding block (16) are both provided with a clamping groove (13).

6. The zoom transmission structure for optical detection equipment according to claim 1, characterized in that: A first sealing ring (14) and a second sealing ring are installed on the isolation cover (4).

7. The zoom transmission structure for optical detection equipment according to claim 4, characterized in that: The sliding block (16) is provided with a through hole (12), and the driving steel sheet (9) passes through the through hole (12).

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