Gantry type image measuring instrument

Abstract

The invention provides a gantry type image measuring instrument, and relates to the field of photogrammetry. Comprising a measuring instrument body and a portal frame arranged on the measuring instrument body. The camera shooting assembly is used for camera shooting measurement; the protective belt is annular and light-permeable, and the protective belt can be movably adjusted in the length direction of the protective belt; side plates are arranged on the front side and the rear side of the protection belt, and a protection cavity used for surrounding the camera shooting assembly is defined by the protection belt and the two side plates; the cleaning mechanism is arranged on one side of the bottom of the protective belt; the number of the inflation sealing rings is two, the two inflation sealing rings are arranged at the edges of the two side plates respectively, and the two inflation sealing rings are attached to the front side edge and the rear side edge of the protection belt respectively; and the inflator mechanism is arranged in the protection cavity. The camera shooting assembly is protected through the closed protection cavity defined by the protection belt and the side plates, meanwhile, the protection belt replaces a lens, cleaning is conducted through the cleaning mechanism, and the lens is prevented from being directly brushed and cleaned to cause abrasion.

Description

Technical Field

[0001] This invention relates to the field of photogrammetry, and particularly to a gantry-type image measuring instrument. Background Technology

[0002] Gantry-type image measuring instruments utilize high-precision image processing and computer technology to perform operations such as dimensional measurement, contour detection, and shape positioning of workpieces in a two-dimensional plane. Due to their high precision, high efficiency, and high stability, they are widely used in various fields including machinery manufacturing, automobile manufacturing, electronics manufacturing, mold making, and education and scientific research.

[0003] In a gantry-type image measuring instrument, the camera used for photogrammetry is a key component. During the photogrammetry process, dust easily adheres to the lens, which can affect the photogrammetry. In traditional technology, a cleaning mechanism is usually set up at the lens position to remove dust by brushing. However, during long-term operation, the cleaning brush is prone to wear due to constant friction with the lens, which can affect its service life and cause scratches, thus affecting the quality of photogrammetry. Summary of the Invention

[0004] This invention provides a gantry-type image measuring instrument to solve the technical problem that long-term brushing and cleaning will damage the camera.

[0005] The present invention solves the above-mentioned technical problems through the following technical solutions: This invention provides a gantry-type image measuring instrument, including a measuring instrument body and a gantry frame mounted on the measuring instrument body; it also includes: a camera assembly for image measurement; a protective belt, which is annular and light-transmitting, and adjustable along its length; side plates are provided on both the front and rear sides of the protective belt, and the protective belt and the two side plates form a protective cavity for surrounding the camera assembly; a cleaning mechanism located on one side of the bottom of the protective belt; two inflatable sealing rings, each located at the edge of one of the two side plates, and the two inflatable sealing rings respectively abutting against the front and rear sides of the protective belt; and an air pump mechanism located inside the protective cavity, used to inject gas into the inflatable sealing rings or to extract gas.

[0006] In this technical solution, a protective cavity is formed by a protective strip and side plates to provide protection for the camera assembly. At the same time, the protective strip replaces the lens and is cleaned by a cleaning mechanism, avoiding direct brushing and cleaning of the lens, which would cause wear.

[0007] Preferably, a connecting plate is fixedly installed between the two side plates, and a carrier plate is fixedly connected to the side plate located on the back of the connecting plate, and the carrier plate is connected to the gantry frame.

[0008] Preferably, four rotating shafts are rotatably mounted between the two side plates, and pulleys are fixedly sleeved at both ends of the rotating shafts; the protective belt includes a transparent belt body and two transmission belt bodies, with the front and rear edges of the transparent belt body respectively fixedly connected to the two transmission belt bodies; the transmission belt body located on the front side of the transparent belt body is wound around the pulleys at the front ends of the four rotating shafts, and the transmission belt body located on the rear side of the transparent belt body is wound around the pulleys at the rear ends of the four rotating shafts; a motor is fixedly mounted on the side plate facing away from the protective belt, and the output shaft end of the motor is fixedly connected to the end of one rotating shaft.

[0009] In this technical solution, a motor provides the drive, and a pulley and transmission belt move the protective belt to adjust the transparent belt at the bottom of the camera assembly.

[0010] Preferably, the cleaning mechanism includes an end frame, a roller brush, a first drive wheel, a second drive wheel, a first synchronous belt, and an air outlet hood. There are two end frames, and each end frame is fixedly connected to a side plate. A roller brush is rotatably mounted between the two end frames, and the bristles of the roller brush are attached to the outer wall of the bottom side of the protective belt. A first drive wheel is fixedly mounted on one end of the roller brush. A first synchronous belt is wound between the first drive wheel and the second drive wheel. The second drive wheel is fixedly sleeved with one end of the rotating shaft extending outside the protective cavity. The air outlet hood is fixedly mounted between the two end frames, and the air outlet of the air outlet hood faces the top of the roller brush away from the protective belt.

[0011] In this technical solution, during the movement of the protective belt, a cleaning mechanism provides brushing and cleaning to ensure the cleanliness of the transparent belt that moves below the camera component.

[0012] Preferably, the system further includes a transmission mechanism, which comprises a protective shell, a first rotating rod, a third transmission wheel, a fourth transmission wheel, a second synchronous belt, a rod body, a second rotating rod, a slider, and a slide rail. A side frame is fixedly connected to the top of the protective shell, and the side frame is fixedly connected to the side wall of the carrier plate. A first rotating rod is rotatably mounted in the middle of the protective shell, and the first rotating rod is rotatably connected to the side frame. The first rotating rod is fixedly sleeved with the third transmission wheel, and the fourth transmission wheel is fixedly sleeved to the end of the roller brush. A second synchronous belt is wound between the third and fourth transmission wheels. A rod body is fixedly connected to one end of the first rotating rod inside the protective shell, and a second rotating rod is rotatably connected to the end of the rod body away from the first rotating rod. A slider is fixedly connected to the second rotating rod, and the slider is slidably connected to the slide rail. The slide rail is arranged horizontally and is slidably installed vertically inside the protective shell.

[0013] Preferably, it further includes a gas supply mechanism, which includes a first housing, a second housing, a first check valve, and a second check valve. The second housing is fixedly installed on the first housing. The first housing is fixedly connected to the carrier plate. A movable strip is provided at the bottom of the first housing. The movable strip is fixedly connected to the end of the slide rail of the transmission mechanism. A side groove is provided on the side wall of the protective shell. The movable strip is slidably connected to the side groove. A first movable rod and a connecting shaft are fixedly connected to the top of the movable strip. The first movable rod is fixedly connected to a first piston inside the first housing. A first connecting strip is fixedly connected to the top of the connecting shaft. A second movable rod is fixedly connected to the first connecting strip. The second movable rod is fixedly connected to a first piston inside the first housing. The first piston is fixedly connected to the second housing. The top surface of the first piston and the inner wall of the first housing form a first inflation chamber, and the bottom surface of the first piston and the inner wall of the second housing form a second inflation chamber. One end of the first one-way valve is connected to the outside air, and the other end of the first one-way valve is connected to the top of the first inflation chamber and the bottom of the second inflation chamber through a first three-way pipe. One end of the second one-way valve is connected to the top of the first inflation chamber and the bottom of the second inflation chamber through a second three-way pipe. The other end of the second one-way valve is connected to an air outlet pipe. The end of the air outlet pipe away from the second one-way valve is provided with two ports, and the two ports are respectively connected to the air outlet hood of the cleaning mechanism and the protective cavity.

[0014] In this technical solution, the air supply mechanism provides airflow to the air outlet hood and self-cleaning to the roller brush; at the same time, it provides airflow to the protective cavity so that after the air-filled sealing ring is deflated, the protective cavity maintains positive pressure and prevents dust from entering.

[0015] Preferably, the air pump mechanism includes a connecting seat, a cylinder, a third piston, a third movable rod, a second connecting strip, a first connecting pipe, and a second connecting pipe. The connecting seat is fixedly connected to one side wall of the camera assembly. The cylinder is fixedly connected to the connecting seat. The third piston is connected to the cylinder. The bottom end of the cylinder is connected to the first connecting pipe. The first connecting pipe is connected to and installed with the second connecting pipe. The second connecting pipe is connected to the inflation sealing ring. The top of the third piston is fixedly connected to the third movable rod. The third movable rod is fixedly connected to the connecting rod through the second connecting strip.

[0016] In this technical solution, the air cylinder mechanism is used for inflating and deflating the air sealing ring.

[0017] Preferably, the rear end of the carrier plate is provided with a straight groove, the straight groove extends into the connecting plate, the bottom of the connecting plate is provided with a hole, and the hole communicates with the straight groove. The connecting rod passes through the hole and the straight groove. A corrugated hose is provided at the bottom of the hole, and the corrugated hose is sleeved on the connecting rod. The bottom end of the corrugated hose is fixedly connected to the rod surface of the connecting rod, and the top end of the corrugated hose is fixedly connected to the wall of the hole.

[0018] Preferably, a push block is fixedly connected to the end of the connecting rod away from the second connecting bar, and a cam is abutted against the bottom of the push block. The cam is fixedly sleeved onto the end of the rotating shaft that extends outside the protective cavity.

[0019] Preferably, a magnetic attraction mechanism is provided at the bottom of the carrier plate. The magnetic attraction mechanism includes an iron base, a permanent magnet, a guide post, a base plate, and a spring. The iron base is fixedly connected to a connecting rod. A guide hole is provided on the iron base. The guide post is connected to the guide hole with a clearance fit. A permanent magnet is fixedly connected to the top of the guide post and is fixedly connected to the bottom of the carrier plate. The base plate is fixedly connected to the bottom of the guide post. The base plate and the iron base are elastically connected by a spring. A handle is fixedly installed on one side of the iron base.

[0020] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of the present invention.

[0021] The positive and progressive effects of this invention are as follows: The aforementioned gantry-type image measuring instrument provides enclosed dust protection by placing the camera assembly within a protective cavity enclosed by a protective belt and side panels. The protective belt is light-transmitting, protecting the camera without interfering with image capture. Furthermore, the protective belt is adjustable and includes a cleaning mechanism. When dust accumulates on the portion of the protective belt below the camera assembly used for light transmission, this portion is removed from under the camera assembly, while the remaining portion is cleaned by the cleaning mechanism. This ensures a clean protective belt at the bottom of the camera assembly, preventing dust from obstructing image capture. Simultaneously, cleaning the protective belt avoids the need for direct cleaning. The camera assembly is designed to prevent lens damage. The protective strap is of sufficient length and can be adjusted in multiple sections to alternate between the camera assembly and the strap, allowing for brushing and cleaning, thus mitigating friction damage and extending its lifespan. Furthermore, the design incorporates an inflatable sealing ring and an air pump mechanism. The air pump inflates and deflates the sealing ring. During adjustment, the inflatable sealing ring deflates and contracts, separating from the protective strap to create a gap and prevent friction and wear. After adjustment, the inflatable sealing ring inflates and adheres to the protective strap, ensuring a tight seal. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 This is a schematic diagram of the front and side view of the structure on the carrier plate of the present invention.

[0024] Figure 3 This is a schematic diagram of the internal structure of the protective cavity of the present invention.

[0025] Figure 4 For the present invention Figure 3 Enlarged structural diagram of section A in the middle.

[0026] Figure 5 This is a schematic diagram of the structure of the inflatable sealing ring and air cylinder mechanism, as well as the connecting rod and carrier plate of the present invention.

[0027] Figure 6 This is a schematic diagram of the back side of the structure on the carrier plate of the present invention.

[0028] Figure 7 For the present invention Figure 6 Enlarged structural diagram of section B.

[0029] Figure 8 This is a schematic diagram of the gas supply mechanism of the present invention.

[0030] Figure 9 This is a schematic diagram of the cleaning mechanism of the present invention.

[0031] Figure 10 This is a schematic diagram of the transmission mechanism and the roller brush of the present invention.

[0032] Figure 11 This is a schematic diagram of the internal structure of the protective shell of the present invention.

[0033] Explanation of reference numerals in the attached figures 1. Measuring instrument body; 2. Gantry frame; 3. Carrier plate; 301. Straight groove; 4. Protective belt; 401. Transparent belt body; 402. Transmission belt body; 5. Side plate; 501. Inflatable sealing ring; 6. Motor; 7. Cleaning mechanism; 701. End frame; 702. Roller brush; 703. First transmission wheel; 704. Second transmission wheel; 705. First synchronous belt; 706. Air outlet cover; 8. Transmission mechanism; 801. Protective shell 802. First rotating rod; 803. Third transmission wheel; 804. Fourth transmission wheel; 805. Second synchronous belt; 806. Rod body; 807. Second rotating rod; 808. Slider; 809. Slide rail; 810. Side groove; 9. Side frame; 10. Handle; 11. Air supply mechanism; 1101. First housing; 1102. Second housing; 1103. First check valve; 1104. Second check valve; 110 5. Exhaust pipe; 1106. Movable bar; 1107. Connecting shaft; 1108. First movable rod; 1109. First connecting bar; 1110. Second movable rod; 1111. First tee pipe; 1112. Second tee pipe; 1113. First piston; 1114. Second piston; 12. Rotating shaft; 1201. Pulley; 13. Connecting plate; 14. Camera assembly; 15. Connecting rod; 1501. Push block; 1 502. Cam; 16. Air pump mechanism; 1601. Connecting seat; 1602. Cylinder body; 1603. Third piston; 1604. Third movable rod; 1605. Second connecting bar; 1606. First connecting pipe; 1607. Second connecting pipe; 17. Corrugated hose; 18. Magnetic attraction mechanism; 1801. Iron base; 1802. Permanent magnet; 1803. Guide post; 1804. Chassis; 1805. Spring. Detailed Implementation

[0034] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0035] like Figures 1-11As shown, the gantry-type image measuring instrument includes a measuring instrument body 1 and a gantry frame 2 mounted on the measuring instrument body 1; it also includes: a camera assembly 14, which is used for image measurement; a protective belt 4, which is annular and light-transmitting, and can be adjusted along its length; side plates 5 are provided on both the front and rear sides of the protective belt 4, and the protective belt 4 and the two side plates 5 form a protective cavity for surrounding the camera assembly 14; a cleaning mechanism 7, which is located on one side of the bottom of the protective belt 4; two inflatable sealing rings 501, which are respectively located on the edges of the two side plates 5 and respectively fit against the front and rear sides of the protective belt 4; and an air pump mechanism 16, which is located inside the protective cavity and is used to fill the inflatable sealing rings 501 with gas or remove gas.

[0036] A connecting plate 13 is fixedly installed between the two side plates 5. A carrier plate 3 is fixedly connected to the side plate 5 located on the back of the connecting plate 13. The carrier plate 3 is connected to the gantry frame 2.

[0037] like Figures 2-3 As shown, four rotating shafts 12 are rotatably mounted between the two side plates 5, and pulleys 1201 are fixedly sleeved at both ends of the rotating shafts 12; the protective belt 4 includes a transparent belt body 401 and two transmission belt bodies 402, and the front and rear edges of the transparent belt body 401 are respectively fixedly connected to the two transmission belt bodies 402; the transmission belt body 402 located on the front side of the transparent belt body 401 is wound around the pulleys 1201 at the front end of the four rotating shafts 12, and the transmission belt body 402 located on the rear side of the transparent belt body 401 is wound around the pulleys 1201 at the rear end of the four rotating shafts 12; a motor 6 is fixedly mounted on the plate surface of the side plate 5 facing away from the protective belt 4, and the output shaft end of the motor 6 is fixedly connected to the end of one rotating shaft 12.

[0038] The transparent strip 401 located below the camera assembly 14, i.e. the transparent strip 401 at the lens position, has dust on its surface that affects photography. In the event that the dust is attached to the surface, the motor 6 drives the rotating shaft 12 to rotate, and the pulley 1201 drives the transmission belt 402 to move the protective belt 4. The part of the transparent strip 401 that was originally located below the camera assembly 14 moves away, while the transparent strip 401 that has entered below the camera assembly 14 is cleaned by the cleaning mechanism 7. Through the above design, the cleanliness of the camera area below the camera assembly 14 is ensured.

[0039] Among them, motor 6 is preferably a servo motor 6. The transmission belt 402 and pulley 1201 are preferably a synchronous belt and a synchronous pulley, respectively.

[0040] like Figure 9As shown, the cleaning mechanism 7 includes an end frame 701, a roller brush 702, a first drive wheel 703, a second drive wheel 704, a first synchronous belt 705, and an air outlet hood 706. There are two end frames 701, and the two end frames 701 are respectively fixed to two side plates 5. The roller brush 702 is rotatably installed between the two end frames 701, and the bristles of the roller brush 702 are attached to the outer wall of the bottom side of the protective belt 4. The first drive wheel 703 is fixedly installed at one end of the roller brush 702. The first synchronous belt 705 is wound between the first drive wheel 703 and the second drive wheel 704. The second drive wheel 704 is fixedly sleeved with one end of the rotating shaft 12 extending outside the protective cavity. The air outlet hood 706 is fixedly installed between the two end frames 701, and the air outlet of the air outlet hood 706 faces the top of the roller brush 702 away from the protective belt 4.

[0041] The cleaning mechanism 7 operates as follows: when the motor 6 drives the rotating shaft 12 to rotate, the rotating shaft 12 drives the second transmission wheel 704 to rotate. Under the transmission action of the first synchronous belt 705, the first transmission wheel 703 rotates. The first transmission wheel 703 drives the roller brush 702 to rotate. Together with the movement of the transparent belt body 401, it achieves brush cleaning. At the same time, during the rotation of the roller brush 702, the air outlet 706 provides airflow to the top of the roller brush 702, blowing away the dust attached to the bristles and providing a certain degree of self-cleaning effect.

[0042] like Figures 3-7 As shown, the air pump mechanism 16 includes a connecting seat 1601, a cylinder 1602, a third piston 1603, a third movable rod 1604, a second connecting bar 1605, a first connecting pipe 1606, and a second connecting pipe 1607. The connecting seat 1601 is fixedly connected to one side wall of the camera assembly 14. The cylinder 1602 is fixedly connected to the connecting seat 1601. The third piston 1603 is connected inside the cylinder 1602. The bottom end of the cylinder 1602 is connected to the first connecting pipe 1606. The first connecting pipe 1606 is connected to the second connecting pipe 1607. The second connecting pipe 1607 is connected to the inflation sealing ring 501. The top of the third piston 1603 is fixedly connected to the third movable rod 1604. The third movable rod 1604 is fixedly connected to the connecting rod 15 through the second connecting bar 1605.

[0043] The rear end of the carrier plate 3 is provided with a straight groove 301, which extends into the connecting plate 13. The bottom of the connecting plate 13 is provided with a hole, which communicates with the straight groove 301. The connecting rod 15 passes through the hole and the straight groove 301. A corrugated hose 17 is provided at the bottom of the hole, and the corrugated hose 17 is sleeved on the connecting rod 15. The bottom end of the corrugated hose 17 is fixed to the rod surface of the connecting rod 15, and the top end of the corrugated hose 17 is fixed to the wall of the hole.

[0044] A push block 1501 is fixedly connected to one end of the connecting rod 15 away from the second connecting bar 1605. The bottom of the push block 1501 abuts against a cam 1502. The cam 1502 is fixedly sleeved onto one end of the rotating shaft 12 that extends outside the protective cavity.

[0045] A magnetic attraction mechanism 18 is provided at the bottom of the carrier plate 3. The magnetic attraction mechanism 18 includes an iron base 1801, a permanent magnet 1802, a guide post 1803, a base 1804, and a spring 1805. The iron base 1801 is fixedly connected to the connecting rod 15. A guide hole is provided on the iron base 1801. The guide post 1803 is connected to the guide hole with clearance fit. The permanent magnet 1802 is fixedly connected to the top of the guide post 1803 and is fixedly connected to the bottom of the carrier plate 3. The base 1804 is fixedly connected to the bottom end of the guide post 1803. The base 1804 and the iron base 1801 are elastically connected by the spring 1805. A handle 10 is fixedly installed on one side of the iron base 1801.

[0046] During the switching of the bottom protective strip 4 of the camera assembly 14, the rotating shaft 12 rotates, and the cam 1502 on it rotates together. The cam 1502 pushes the push block 1501 upward, and the push block 1501 drives the connecting rod 15 to move upward. The iron seat 1801 on the connecting rod 15 moves upward together through the guide post 1803 and the guide hole, so that the iron seat 1801 contacts the permanent magnet 1802. Through magnetic attraction, the iron seat 1801 is limited, so that the push block 1501 and the connecting rod 15 are held in a high position. At the same time, the spring 1805 is stretched, and the connecting rod 1... 5. Moving upwards, the third movable rod 1604 is driven to move upwards via the second connecting bar 1605. The third movable rod 1604 drives the third piston 1603 to move upwards within the cylinder 1602. Gas is drawn from the inflatable sealing ring 501 through the first connecting pipe 1606 and the second connecting pipe 1607, causing the inflatable sealing ring 501 to contract. The inflatable sealing ring 501 separates from the transmission belt body 402 of the protective belt 4. During the subsequent movement and adjustment of the protective belt 4, friction and wear between the inflatable sealing ring 501 and the transmission belt body 402 of the protective belt 4 are avoided.

[0047] After the protective belt 4 is moved and adjusted, the number of rotations of the rotating shaft 12 is fixed and is an integer number of rotations. The cam 1502 rotates an integer number of rotations with the rotating shaft 12, and its state is the same as before the adjustment. The manual push handle 10 is used to separate the iron seat 1801 from the permanent magnet 1802. The iron seat 1801 drives the connecting rod 15 and the push block 1501 to move down. The push block 1501 is in contact with the cam 1502. The connecting rod 15 drives the third piston 1603 to move down through the second connecting bar 1605 and the third movable rod 1604. Gas is refilled into the air-filled sealing ring 501 through the first connecting pipe 1606 and the second connecting pipe 1607. The air-filled sealing ring 501 is in contact with the transmission belt body 402 and a new seal is formed.

[0048] The above design reduces wear on the transmission belt 402 and the pneumatic sealing ring 501.

[0049] The corrugated hose 17 is used to seal the hole, and its corrugated shape allows it to extend and retract to accommodate the up and down movement of the connecting rod 15.

[0050] The straight groove 301 provides space for the vertical movement of the connecting rod 15.

[0051] like Figure 6 , Figure 8 , Figure 10 as well as Figure 11 As shown, it also includes a transmission mechanism 8, which includes a protective shell 801, a first rotating rod 802, a third transmission wheel 803, a fourth transmission wheel 804, a second synchronous belt 805, a rod body 806, a second rotating rod 807, a slider 808, and a slide rail 809. A side frame 9 is fixedly connected to the top of the protective shell 801, and the side frame 9 is fixedly connected to the side wall of the carrier plate 3. The first rotating rod 802 is rotatably mounted in the middle of the protective shell 801. The first rotating rod 802 is rotatably connected to the side frame 9, and the first rotating rod 802 is fixedly sleeved with the third transmission wheel 803. The fourth transmission wheel 804 is fixedly sleeved to the end of the roller brush 702. A second synchronous belt 805 is wound between the third transmission wheel 803 and the fourth transmission wheel 804. One end of the first rotating rod 802 located inside the protective shell 801 is fixedly connected to a rod body 806. The end of the rod body 806 away from the first rotating rod 802 is rotatably connected to a second rotating rod 807. The second rotating rod 807 is fixedly connected to a slider 808. The slider 808 is slidably connected to a slide rail 809. The slide rail 809 is arranged horizontally and is slidably installed vertically inside the protective shell 801.

[0052] It also includes a gas supply mechanism 11, which includes a first housing 1101, a second housing 1102, a first one-way valve 1103, and a second one-way valve 1104. The second housing 1102 is fixedly installed on the first housing 1101. The first housing 1101 is fixedly connected to the carrier plate 3. A movable strip 1106 is provided at the bottom of the first housing 1101. The movable strip 1106 is fixedly connected to the end of the slide rail 809 of the transmission mechanism 8. A side groove 810 is provided on the side wall of the protective shell 801. The movable strip 1106 is slidably connected to the side groove 810. A first movable rod 1108 and a connecting shaft 1107 are fixedly connected to the top of the movable strip 1106. The first movable rod 1108 is fixedly connected to a first piston 1113 that is connected to the first housing 1101. A first connecting strip 1109 is fixedly connected to the top of the connecting shaft 1107. A second movable rod is fixedly connected to the first connecting strip 1109. 1110, the second movable rod 1110 is fixedly connected to the second piston 1114 inside the second housing 1102. The top surface of the first piston 1113 and the inner wall of the first housing 1101 form a first inflation chamber, and the bottom surface of the first piston 1113 and the inner wall of the second housing 1102 form a second inflation chamber. One end of the first one-way valve 1103 is connected to the outside air, and the other end of the first one-way valve 1103 is connected to the top of the first inflation chamber and the bottom of the second inflation chamber through the first three-way pipe 1111. One end of the second one-way valve 1104 is connected to the top of the first inflation chamber and the bottom of the second inflation chamber through the second three-way pipe 1112. The other end of the second one-way valve 1104 is connected to an air outlet pipe 1105. The end of the air outlet pipe 1105 away from the second one-way valve 1104 is provided with two ports, and the two ports are respectively connected to the air outlet hood 706 of the cleaning mechanism 7 and the protective cavity.

[0053] During the switching of the bottom protective belt 4 of the camera assembly 14, the rotating shaft 12 rotates, driving the roller brush 702 to rotate. The roller brush 702 drives the fourth transmission wheel 804 to rotate. Through the transmission of the second synchronous belt 805, the third transmission wheel 803 rotates. The third transmission wheel 803 drives the first rotating rod 802 to rotate. The first rotating rod 802 causes the rod body 806 to rotate inside the protective shell 801. The rod body 806 drives the slider 808 to slide along the length of the slide rail 809, and at the same time drives the slide rail 809 to move up and down vertically inside the protective shell 801. Then, the slide rail 809 drives the movable bar 1106 to move up and down reciprocally. When the movable bar 1106 moves upward, it causes the first movable rod 1108 and the second movable rod 1110 to move upward together. The first movable rod 1108 drives the first piston 1113 to move upward in the first housing 1101, which reduces the volume of the first inflation chamber. The gas in the first inflation chamber is filled into the air hood 706 and the protective chamber through the second one-way valve 1104 and the air outlet pipe 1105. The second movable rod 1110 drives the second piston 1114 to move upward in the second housing 1102, which increases the volume of the second inflation chamber. Outside air enters the second inflation chamber through the first one-way valve 1103.

[0054] When the movable bar 1106 moves downward, it causes the first movable rod 1108 and the second movable rod 1110 to move downward together. The first movable rod 1108 drives the first piston 1113 to move downward within the first housing 1101, increasing the volume of the first inflation chamber. Outside air enters the first inflation chamber through the first one-way valve 1103. The second movable rod 1110 drives the second piston 1114 to move downward within the second housing 1102, decreasing the volume of the second inflation chamber. The gas in the second inflation chamber is filled into the air outlet hood 706 and the protective chamber through the second one-way valve 1104 and the air outlet pipe 1105.

[0055] In summary, when the movable strip 1106 is driven by the transmission mechanism 8, i.e., during the switching and adjustment of the bottom protective belt 4 of the camera component 14, gas is filled into the air hood 706 and the protective cavity.

[0056] The air hood 706 is used to clean the roller brush 702, and to fill the protective cavity with gas to create positive pressure inside, so as to prevent dust from entering the protective cavity when the air sealing ring 501 is separated from the transmission belt body 402.

[0057] In practice, a filter is installed on the first check valve 1103 to filter the incoming air and ensure its cleanliness.

[0058] This invention is not limited to the embodiments described above. Any changes in shape or structure shall fall within the protection scope of this invention. The protection scope of this invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of this invention, but all such changes and modifications shall fall within the protection scope of this invention.

Claims

1. A gantry-type image measuring instrument, comprising a measuring instrument body (1) and a gantry frame (2) mounted on the measuring instrument body (1); characterized in that, Also includes: Camera assembly (14), the camera assembly (14) being used for camera measurement; The protective belt (4) is annular and light-transmitting, and the protective belt (4) can be moved and adjusted along its length; the protective belt (4) is provided with side plates (5) on both the front and rear sides, and the protective belt (4) and the two side plates (5) form a protective cavity for surrounding the camera assembly (14); Cleaning mechanism (7), the cleaning mechanism (7) is disposed on one side of the bottom of the protective strip (4); Inflatable sealing ring (501), the number of inflatable sealing ring (501) is two, and the two inflatable sealing rings (501) are respectively set at the edges of the two side plates (5), and the two inflatable sealing rings (501) are respectively attached to the front and rear sides of the protective strip (4). The air pump mechanism (16) is disposed in the protective cavity and is used to fill the gas into the air sealing ring (501) or extract the gas.

2. The gantry-type image measuring instrument as described in claim 1, characterized in that: A connecting plate (13) is fixedly installed between the two side plates (5), and a carrier plate (3) is fixedly connected to the side plate (5) on the back of the connecting plate (13), and the carrier plate (3) is connected to the gantry (2).

3. The gantry-type image measuring instrument as described in claim 2, characterized in that: Four rotating shafts (12) are rotatably installed between the two side plates (5), and pulleys (1201) are fixedly sleeved at both ends of the rotating shafts (12); the protective belt (4) includes a transparent belt body (401) and two transmission belt bodies (402), and the front and rear sides of the transparent belt body (401) are respectively fixedly connected to the two transmission belt bodies (402); the transmission belt body (402) located in front of the transparent belt body (401) is wound around the pulleys (1201) at the front end of the four rotating shafts (12), and the transmission belt body (402) located behind the transparent belt body (401) is wound around the pulleys (1201) at the rear end of the four rotating shafts (12). A motor (6) is fixedly installed on the side plate (5) facing away from the protective belt (4), and the output shaft end of the motor (6) is fixedly connected to the end of one rotating shaft (12).

4. The gantry-type image measuring instrument as described in claim 3, characterized in that: The cleaning mechanism (7) includes an end frame (701), a roller brush (702), a first drive wheel (703), a second drive wheel (704), a first synchronous belt (705), and an air outlet hood (706). There are two end frames (701), and the two end frames (701) are fixedly connected to two side plates (5) respectively. The roller brush (702) is rotatably installed between the two end frames (701), and the bristles of the roller brush (702) are attached to the outer wall of the bottom side of the protective belt (4). One end of the roller brush (702) is fixedly mounted with a first drive wheel (703), and a first synchronous belt (705) is wound between the first drive wheel (703) and the second drive wheel (704). The second drive wheel (704) is fixedly sleeved with one end of the rotating shaft (12) extending outside the protective cavity. The air outlet hood (706) is fixedly mounted between the two end frames (701), and the air outlet of the air outlet hood (706) faces the side of the top of the roller brush (702) away from the protective belt (4).

5. The gantry-type image measuring instrument as described in claim 4, characterized in that: It also includes a transmission mechanism (8), which includes a protective shell (801), a first rotating rod (802), a third transmission wheel (803), a fourth transmission wheel (804), a second synchronous belt (805), a rod body (806), a second rotating rod (807), a slider (808), and a slide rail (809). A side frame (9) is fixedly connected to the top of the protective shell (801), and the side frame (9) is fixedly connected to the side wall of the carrier plate (3). A first rotating rod (802) is rotatably installed in the middle of the protective shell (801). The first rotating rod (802) is rotatably connected to the side frame (9), and the first rotating rod (802) is fixedly sleeved with the third transmission wheel (803). The fourth transmission wheel (804) is fixedly sleeved to the end of the roller brush (702). A second synchronous belt (805) is wound between the third transmission wheel (803) and the fourth transmission wheel (804). One end of the first rotating rod (802) located inside the protective shell (801) is fixedly connected to a rod body (806). The end of the rod body (806) away from the first rotating rod (802) is rotatably connected to a second rotating rod (807). The second rotating rod (807) is fixedly connected to a slider (808). The slider (808) is slidably connected to a slide rail (809). The slide rail (809) is arranged horizontally and is slidably installed in the protective shell (801) in the vertical direction.

6. The gantry-type image measuring instrument as described in claim 5, characterized in that: It also includes a gas supply mechanism (11), which includes a first housing (1101), a second housing (1102), a first check valve (1103), and a second check valve (1104). The second housing (1102) is fixedly installed on the first housing (1101). The first housing (1101) is fixedly connected to the carrier plate (3). A movable strip (1106) is provided at the bottom of the first housing (1101). The movable strip (1106) is connected to the slide rail (809) of the transmission mechanism (8). The protective shell (801) is fixedly connected to the side wall, and a side groove (810) is provided on the side wall. The movable strip (1106) is slidably connected to the side groove (810). A first movable rod (1108) and a connecting shaft (1107) are fixedly connected to the top of the movable strip (1106). The first movable rod (1108) is fixedly connected to a first piston (1113) that is fitted into the first housing (1101). A first connecting strip (1109) is fixedly connected to the top of the connecting shaft (1107). A second movable rod (1110) is fixedly connected to the first housing (1102), and the second movable rod (1110) is fixedly connected to the second piston (1114) that is connected to the second housing (1102). The top surface of the first piston (1113) and the inner wall of the first housing (1101) form a first inflation chamber, and the bottom surface of the first piston (1113) and the inner wall of the second housing (1102) form a second inflation chamber. One end of the first one-way valve (1103) is connected to the outside air, and the other end of the first one-way valve (1103) is connected to the first... The three-way pipe (1111) is connected to the top of the first inflation chamber and the bottom of the second inflation chamber. One end of the second one-way valve (1104) is connected to the top of the first inflation chamber and the bottom of the second inflation chamber through the second three-way pipe (1112). The other end of the second one-way valve (1104) is connected to the air outlet pipe (1105). The end of the air outlet pipe (1105) away from the second one-way valve (1104) is provided with two ports, and the two ports are respectively connected to the air outlet hood (706) of the cleaning mechanism (7) and the protective cavity.

7. The gantry-type image measuring instrument as described in claim 3, characterized in that: The air pump mechanism (16) includes a connecting seat (1601), a cylinder (1602), a third piston (1603), a third movable rod (1604), a second connecting bar (1605), a first connecting pipe (1606), and a second connecting pipe (1607). The connecting seat (1601) is fixedly connected to one side wall of the camera assembly (14). The cylinder (1602) is fixedly connected to the connecting seat (1601). The third piston is connected to the cylinder (1607) inside the cylinder (1602). The piston (1603) has a first connecting pipe (1606) connected to the bottom end of the cylinder (1602). The first connecting pipe (1606) is connected to a second connecting pipe (1607). The second connecting pipe (1607) is connected to an inflatable sealing ring (501). The top of the third piston (1603) is fixedly connected to a third movable rod (1604). The third movable rod (1604) is fixedly connected to a connecting rod (15) through a second connecting strip (1605).

8. The gantry-type image measuring instrument as described in claim 7, characterized in that: The rear end of the carrier plate (3) is provided with a straight groove (301), which extends into the connecting plate (13). The bottom of the connecting plate (13) is provided with a hole, which communicates with the straight groove (301). The connecting rod (15) passes through the hole and the straight groove (301). A corrugated hose (17) is provided at the bottom of the hole, and the corrugated hose (17) is sleeved on the connecting rod (15). The bottom end of the corrugated hose (17) is fixed to the rod surface of the connecting rod (15), and the top end of the corrugated hose (17) is fixed to the wall of the hole.

9. The gantry-type image measuring instrument as described in claim 8, characterized in that: The end of the connecting rod (15) away from the second connecting bar (1605) is fixedly connected to a push block (1501), the bottom of the push block (1501) abuts against a cam (1502), and the cam (1502) is fixedly sleeved onto the end of the rotating shaft (12) extending outside the protective cavity.

10. The gantry-type image measuring instrument as described in claim 8, characterized in that: The bottom of the carrier plate (3) is provided with a magnetic attraction mechanism (18). The magnetic attraction mechanism (18) includes an iron base (1801), a permanent magnet (1802), a guide post (1803), a chassis (1804), and a spring (1805). The iron base (1801) is fixedly connected to the connecting rod (15). A guide hole is opened on the iron base (1801). The guide post (1803) is connected to the guide hole with a clearance fit. The top of the guide post (1803) is fixedly connected to the permanent magnet (1802), and the permanent magnet (1802) is fixedly connected to the bottom of the carrier plate (3). The bottom end of the guide post (1803) is fixedly connected to the chassis (1804). The chassis (1804) and the iron base (1801) are elastically connected by the spring (1805). A handle (10) is fixedly installed on one side of the iron base (1801).

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