Claw type screw pre-fastening assembly device and method for narrow space

Abstract

The invention provides an embracing claw type screw pre-fastening assembly device and method for a narrow space. The embracing claw type screw pre-fastening assembly device and method can be applied to installation and adjustment of a complex large optical system. The device comprises a clamping part, a mounting head part, an inner round rod, an outer guide pipe, a lower handle, an elastic part, an upper handle and an alignment part, the internal shape and size of one end of the mounting head are matched with those of a screw head to be mounted, and the other end is fixedly connected with one end of the inner round rod; the clamping part is fixed to the outer side of the mounting head and used for clamping a to-be-mounted screw. The other end of the inner round rod is connected with the upper handle; the inner round rod is arranged in the outer guide pipe; one end of the outer catheter is fixedly connected with the lower handle; the elastic component is detachably and fixedly arranged between the upper handle and the lower handle and on the outer side of the outer catheter; and the alignment component is used for aligning the to-be-mounted screw to the screw mounting hole in real time in the mounting and moving process. The screw can be prevented from slipping off in the pre-fastening process, it is guaranteed that the screw is aligned with a screw mounting hole in the mounting and moving process, and redundant objects and damage to a system are prevented.

Description

Technical Field

[0001] The present invention relates to the field of alignment technology for complex large optical systems, and particularly to a claw-type screw pre-tightening assembly device and method for narrow spaces. Background Art

[0002] During the test process of current large engineering task projects, it is necessary to repeatedly align and test optical components or sub-assemblies. To ensure product safety, higher safety operation requirements are imposed on alignment engineers. However, some conventional standard general tools cannot meet the requirements of the usage scenarios and are often restricted in operation due to reasons such as narrow spaces. Although methods such as using a lengthened rod tool or fixing a screw to the front end of the tool with tape can extend into narrow spaces, there is still a high risk of slipping, and it may bring foreign objects to the product, affecting the cleanliness of the product, making it difficult to meet the operation requirements. Therefore, it is necessary to design a special tool for pre-tightening screws to prevent slipping to replace conventional standard general tools, avoid high-risk operations during the general assembly process, effectively improve work efficiency and the safety and reliability of operations, and greatly reduce the risk of generating foreign objects and damaging the product. Summary of the Invention

[0003] For this reason, the present invention provides a claw-type screw pre-tightening assembly device for narrow spaces, including: a clamping component, a mounting head, an inner round rod, an outer conduit, a lower handle, an elastic component, an upper handle, and an alignment component; wherein,

[0004] The inner shape and size of one end of the mounting head are adapted to the shape and size of the head of the screw to be installed, and the other end is fixedly connected to one end of the inner round rod;

[0005] The clamping component is fixed on the outer side of the mounting head for clamping the screw to be installed;

[0006] The other end of the inner round rod is detachably connected to the upper handle;

[0007] The inner diameter of the outer conduit matches the outer diameter of the inner round rod, and the inner round rod is placed in the outer conduit; one end of the outer conduit is fixedly connected to the lower handle;

[0008] The elastic component is detachably and fixedly arranged between the upper handle and the lower handle, on the outer side of the outer conduit;

[0009] The alignment component is used to align the screw to be installed clamped by the component to be clamped with the screw mounting hole in real time during the installation movement.

[0010] Furthermore, the device further includes a proximity reminder component for sending a reminder signal to the user when the device moves to a preset distance from the screw mounting hole.

[0011] Furthermore, the proximity reminder component includes a proximity sensor and a reminder module; wherein,

[0012] A proximity sensor for collecting distance data between the device and the screw mounting hole;

[0013] A reminder module for determining whether the distance data collected by the proximity sensor is less than a preset threshold, and when the collected distance data is less than the predetermined threshold, sending a reminder message to the user.

[0014] Further, the alignment component includes: a micro camera, a gyroscope sensor, a data processing module, a storage module, a display module, and a power supply module; wherein,

[0015] The micro camera is arranged at one end of the lower handle facing the mounting head, and is used for collecting images in real time during the movement of the device towards the screw mounting hole;

[0016] The gyroscope sensor, the data processing module, the storage module, the display module, and the power supply module are arranged inside the lower handle; wherein,

[0017] The gyroscope sensor is used for collecting data on changes in the moving direction during the movement of the device in real time;

[0018] The processing module is used for receiving and processing in real time the data on changes in the moving direction collected by the gyroscope sensor and the images captured by the micro camera, and outputting information for adjusting the moving amount of the device;

[0019] The storage module is used for storing the distance between the center position of the micro camera lens and the radial axis of the inner circular rod in advance, and caching the first frame of the image captured by the micro camera;

[0020] The display module is used for providing an indication for the user to adjust the moving amount of the device according to the information output by the processing module for adjusting the moving amount of the device;

[0021] The power supply module is used for supplying power to the micro camera, the data processing module, the storage module, and the display module.

[0022] Further, the data processing module compares the images received in real time with the cached first frame of the image, determines the position deviation between the screw mounting holes and / or the position deviation between the environments around the screw mounting holes between the two frames of images, and reads the distance between the center position of the camera and the radial axis of the inner circular rod stored in advance from the storage module and the data on changes in the moving direction collected in real time by the gyroscope sensor, and determines the moving amounts that the device needs to move upward, leftward, and rightward.

[0023] Further, an external force that compresses the elastic member is applied to the upper handle and the lower handle respectively, causing the outer catheter to move upward with the lower handle and the inner round rod to move downward with the upper handle, and the clamping member to open freely outward; at this time, the screw to be installed and the gasket can be loaded into the clamping member, and the head of the screw to be installed is loaded to match the installation head; the external force applied to the upper handle and the lower handle is released, and the upper handle and the lower handle are pushed to translate in two opposite directions, causing the inner wall of the outer catheter to contact the clamping member, squeezing the clamping member to contract inward, clamping the head of the screw to be installed and achieving self-locking.

[0024] Further, the clamping member is a three-jaw gripper (1), which is evenly distributed along the outer side of the installation head at 120°.

[0025] Further, the installation head is an internal hexagonal head (2).

[0026] The present invention also provides an assembly method using the above-described device, including:

[0027] Step 1, an external force that compresses the elastic member is applied to the upper handle and the lower handle respectively, causing the outer catheter to move upward with the lower handle and the inner round rod to move downward with the upper handle, and the clamping member to open freely outward;

[0028] Step 2, the screw to be installed and the gasket are loaded into the clamping member, and the head of the screw to be installed is loaded to match the installation head;

[0029] Step 3, the external force applied to the upper handle and the lower handle is released, and the upper handle and the lower handle are pushed to translate in two opposite directions, causing the inner wall of the outer catheter to contact the clamping member, squeezing the clamping member to contract inward, clamping the head of the screw to be installed and achieving self-locking;

[0030] Step 4, the user initially aligns the device with the screw installation hole, and turns on the micro camera to capture an image;

[0031] Step 5, according to the amount of movement that the device needs to move upward, leftward, and rightward indicated by the display module, the user moves the device so that the device can always align with the screw installation hole during the movement;

[0032] Further, the method further includes the following steps:

[0033] Step 6, when the device emits a proximity reminder message, the user reduces the speed of moving the device according to the reminder message and fixes the hand movement, and aligns the screw to be installed with the screw installation hole.

[0034] The gripper-type screw pre-fastening assembly device and method for a narrow space of the present invention can prevent the screw from slipping during the pre-fastening process and always align with the screw installation hole during the installation movement, preventing the generation of foreign objects and damage to complex large optical systems. Brief Description of the Drawings

[0035] In order to more clearly illustrate the technical solutions of the specific embodiments of the present invention, the following will briefly introduce the drawings required for use in the description of the specific embodiments. Obviously, the drawings in the following description are some embodiments of the present invention. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0036] Figure 1 Schematic diagram of the gripper-type screw pre-tightening device of the present invention;

[0037] Figure 2 Principle block diagram of the alignment component of the gripper-type screw pre-tightening device of the present invention;

[0038] Figure 3 Gripper-type screw pre-tightening assembly device for narrow spaces with an alignment component of the present invention. Specific Embodiments

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of protection of the present invention.

[0040] As Figure 1 shown, the gripper-type screw pre-tightening assembly device for narrow spaces of the present invention, as an example, can be applied to the alignment and adjustment of complex large optical systems, and is composed of three grippers 1, an internal hexagonal head 2, an internal round rod 4, an outer catheter 3, a lower handle 5, a spring 6, and an upper handle 7. Among them,

[0041] The internal hexagonal head 2 is machined from S2 steel, and different sizes are designed according to different application scenarios to match screws of different sizes. One end of it is welded to the internal round rod 4, or the internal hexagonal head 2 and the internal round rod 4 are integrally formed, transmitting force and torque during the pre-tightening process to prevent minor deformation during the pre-tightening process.

[0042] The internal round rod 4 is made of S2 steel. One end of it is welded to the internal hexagonal head 2 to form an internal hexagonal rod. The other end of it is equipped with an upper handle 7 as a force arm to apply a force to the internal hexagonal rod. Different internal hexagonal rods can be designed according to different screw sizes.

[0043] The three-jaw gripper 1 is made of low-manganese spring steel through structural design and bending processing. It is evenly distributed at 120° along the circumference of the hexagon socket bar and welded to the hexagon socket bar. Due to the inherent material properties of the three jaws, they open in the free state, and at this time, screws and washers can be inserted. Under the action of the outer conduit 3, the screws are tightly held to prevent the screws and washers from slipping during the assembly process. The welding method can avoid the consistency of the opening and closing states of the three-jaw gripper 1. Of course, as a clamping component, the three-jaw gripper 1 is only an example.

[0044] The outer conduit 3 is made of medium-carbon alloy steel, which is a 1-mm thin-walled round tube with an inner diameter size matching the outer diameter of the hexagon socket bar. A lower handle 5 is installed on it to facilitate applying an external force to push the outer conduit to translate along the hexagon socket bar when loading and unloading screws.

[0045] The handle is made of polytetrafluoroethylene and is divided into an upper handle and a lower handle. The upper handle 7 is detachably connected to the hexagon socket bar for replacing different hexagon socket bars; the lower handle 5 is connected to the outer conduit 3 and is used to transmit force and torque respectively. When loading and unloading screws, by applying forces to the upper and lower handles, the spring 6 is compressed, thereby driving the outer conduit 3 to translate upward.

[0046] The assembly method of the gripper-type screw pre-tightening assembly device for narrow spaces of the present invention is as follows:

[0047] Apply two reverse forces to the upper handle 7 and the lower handle 5 to compress the spring 6 located between them. Under the action of the external force, the outer conduit 3 moves upward with the lower handle 5, and the hexagon socket bar moves downward with the upper handle 7. The three-jaw gripper 1 loses its restraint under its own elastic force and opens outward freely. At this time, the matching hexagon socket screws and washers can be inserted into the three-jaw gripper, and the screw head is matched and inserted into the hexagon socket bar.

[0048] After the screw is inserted into the gripper, release the compressive reverse forces applied to the upper handle 7 and the lower handle 5, so that the spring 6, under the action of its own elastic force extension, pushes the upper handle 7 and the lower handle 5 to translate in two opposite directions. At this time, the outer conduit 3 is subjected to a downward thrust, and the inner wall of the outer conduit 3 contacts the three-jaw gripper 1, squeezing the three-jaw gripper 1 to contract inward, firmly holding the screw head and achieving self-locking. Compared with conventional extended standard tools, this device can effectively and reliably prevent the screw from slipping during the assembly process.

[0049] Such as Figure 2As shown, the gripper-type screw pre-tightening assembly device for narrow spaces of the present invention further includes an alignment component for aligning the screw to be installed with the screw installation hole in real time during the installation process. A micro camera is provided at one end facing the inner hexagonal head on the lower handle 5, and a gyroscope sensor, a data processing module, a storage module, a display module, and a power supply module are provided inside the lower handle 5. Among them, the gyroscope sensor is used to collect real-time data on changes in the moving direction (such as jitter) during the movement of the pre-tightening assembly device of the present invention. The micro camera is used to collect real-time images of the pre-tightening assembly device of the present invention during the movement towards the screw installation hole. The storage module is used to store the distance between the center position of the micro camera lens and the radial axis of the inner hexagonal rod in advance, and this distance is used to determine the fixed deviation of the image collected by the micro camera relative to the central axis of the inner hexagonal rod (that is, the central axis of the screw to be installed). The processing module can use DSP or FPGA and is used to process in real time the data on changes in the moving direction collected by the gyroscope sensor and the images captured by the micro camera, and output information for adjusting the movement amount of the pre-tightening assembly device of the present invention. The display module is used to provide an indication for the user to adjust the movement amount of the pre-tightening assembly device of the present invention according to the information output by the processing module, and the power supply module is used to supply power to the micro camera, the data processing module, the storage module, and the display module.

[0050] As Figure 3 is the gripper-type screw pre-tightening assembly device for narrow spaces of the present invention having the above alignment component.

[0051] When the user assembles the screw using the pre-tightening assembly device after pre-tightening the screw, the user first roughly aligns the pre-tightening assembly device with the screw installation hole, turns on the micro camera to capture images, and the first frame of image data captured includes the screw installation hole and the environment around the screw installation hole. The micro camera transmits the captured images to the data processing module and caches them in the storage module. During the process of the user moving the pre-tightening assembly device towards the screw installation hole after pre-tightening the screw, the micro camera captures images in real time and transmits the captured images to the data processing module. The data processing module compares the images received in real time with the first frame of image, extracts image features, determines the position deviation between the screw installation holes and / or the position deviation between the environments around the screw installation holes (when the screw installation hole is not visible) between the two frames of images, and reads the distance between the center position of the camera and the radial axis of the inner hexagonal rod stored in advance from the storage module and the data on changes in the moving direction collected in real time by the gyroscope sensor, and determines the movement amounts that the pre-tightening assembly device needs to move upward, leftward, and rightward, so that the pre-tightening assembly device can always be accurately aligned with the screw installation hole during the movement process, preventing damage to the complex large optical system caused by the screw to be installed not being accurately aligned with the screw installation hole.

[0052] The present invention can also be provided with a proximity reminder component in the pre-fastening assembly device as needed, which is used to send a reminder signal to the user when the device moves to a preset distance from the screw installation hole; the proximity reminder component includes a proximity sensor and a reminder module; the proximity sensor is used to collect the distance data between the device and the screw installation hole; the reminder module is used to determine whether the distance data collected by the proximity sensor is less than a preset threshold, and when the collected distance data is less than the predetermined threshold, a reminder message is sent to the user. According to the working scenario, the proximity sensor can be an inductive proximity sensor, a photoelectric sensor, an ultrasonic proximity sensor, or a capacitive proximity sensor. When the pre-fastening assembly device moves to a preset distance from the screw installation hole, a reminder message is sent to the user to remind the user to fix the hand movement as much as possible and precisely fix the pre-fastening assembly device to the screw installation hole. The type of reminder message can be set according to the working scenario, and the reminder message can be sound or light.

[0053] During installation, the user initially aligns the device with the screw installation hole and turns on the micro camera to take an image; according to the amount of movement indicated by the display module for the device to move upward, leftward, and rightward, the user moves the device so that the device can always be aligned with the screw installation hole during the movement; when the device sends a proximity reminder message, the user reduces the speed of moving the device according to the reminder message and fixes the hand movement to align the screw to be installed with the screw installation hole.

[0054] As can be seen from the above introduction, the present invention proposes a claw-type screw pre-fastening assembly device for narrow spaces. By pressing the upper handle 7 and the lower handle 5, the outer catheter 3 compresses the spring 6 under the action of external force, so that the three claws 1 open outward under the action of elastic force. The hexagon socket bar 4 matches screws of different sizes. After releasing the handle, the spring 6 pushes the outer catheter 3 towards the end of the three claws 1 under the action of the free spring force, so that the inner wall of the outer catheter 3 fits the three claws 1 to tightly hold the screw in the middle, avoiding the screw from slipping during the pre-fastening process, preventing the generation of debris and damage to the product. The alignment component can enable the screw pre-fastening assembly device of the present invention to always be aligned with the screw installation hole during the installation movement, and remind the user when the screw pre-fastening assembly device of the present invention is close to the screw installation hole, preventing damage to complex large optical systems.

[0055] Please note that the technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as within the scope described in this specification. The above embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those skilled in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A claw-type screw pre-tightening assembly device for a narrow space, characterized in that: The device comprises: a clamping component, a mounting head, an inner round rod, an outer guide tube, a lower handle, an elastic component, an upper handle, and an alignment component; wherein, The internal shape and size of one end of the installation head are adapted to the shape and size of the head of the screw to be installed, and the other end is fixedly connected to one end of the inner round rod; The clamping component is fixed on the outside of the mounting head and is used to clamp the screw to be mounted; The other end of the inner round rod is detachably connected to the upper handle; The inner diameter of the outer catheter matches the outer diameter of the inner rod, and the inner rod is placed in the outer catheter; one end of the outer catheter is fixedly connected to the lower handle; The elastic component is detachably fixedly arranged between the upper handle and the lower handle and outside the outer catheter; The alignment component is used to align the screw to be installed clamped by the clamping component with the screw installation hole in real time during the installation movement process.

2. The device according to claim 1, characterized in that The device also includes a proximity reminder component, which is used to send a reminder signal to the user when the device moves to a preset distance from the mounting screw hole.

3. The device according to claim 2, characterized in that The proximity reminder component includes a proximity sensor and a reminder module; wherein, A proximity sensor, used to collect distance data between the device and the screw mounting hole; The reminder module is used to determine whether the distance data collected by the proximity sensor is less than a preset threshold value, and send a reminder message to the user when the collected distance data is less than the preset threshold value.

4. The device according to any one of claims 1 to 3, characterized in that: The alignment component includes: a micro camera, a gyro sensor, a data processing module, a storage module, a display module and a power module; wherein, A miniature camera is arranged on the end of the lower handle facing the mounting head, and is used to collect images of the device in real time during the process of moving toward the screw mounting hole; The gyroscope sensor, data processing module, storage module, display module and power module are arranged in the lower handle; wherein, A gyroscope sensor is used to collect real-time data on the change in movement direction of the device during movement; A processing module, used to receive and process in real time the moving direction change data collected by the gyro sensor and the image captured by the micro camera, and output information for adjusting the movement amount of the device; A storage module, used to store the pre-calibrated distance between the center position of the micro camera and the radial axis of the inner rod, and cache the first frame image taken by the micro camera; A display module, used for providing a user with instructions for adjusting the movement amount of the device according to the information for adjusting the movement amount of the device output by the processing module; The power module is used to provide power to the micro camera, data processing module, storage module, and display module.

5. The device according to claim 4, characterized in that The data processing module compares the image received in real time with the first frame image in the cache, and determines the amount of movement that the device needs to move upward, leftward, and rightward through the position deviation between the screw mounting holes between the two frames of images and / or the position deviation between the environments around the screw mounting holes, and reads the pre-stored distance between the center position of the camera and the radial axis of the inner rod and the movement direction change data collected in real time by the gyroscope sensor from the storage module.

6. The device according to any one of claims 1 to 3, characterized in that: An external force is applied to the upper handle and the lower handle respectively to compress the elastic component, causing the outer catheter to move upward with the lower handle and the inner round rod to move downward with the upper handle, and the clamping component to open freely outward; at this time, the screws and gaskets to be installed can be installed into the clamping component, so that the heads of the screws to be installed are matched with the installation heads; the external force applied by the upper handle and the lower handle are released, and the upper handle and the lower handle are pushed to translate in two opposite directions, causing the inner wall of the outer catheter to contact the clamping component, squeezing the clamping component to shrink inward, holding the heads of the screws to be installed and achieving self-locking.

7. The device according to claim 6, characterized in that The clamping part is three claws (1) which are evenly distributed at 120 degrees along the outer side of the mounting head.

8. The device according to claim 6, characterized in that The mounting head is a hexagonal head (2).

9. An assembly method using the device according to any one of claims 1 to 8, characterized in that: The method includes: Step 1, applying an external force to compress the elastic component on the upper handle and the lower handle respectively, causing the outer catheter to move upward with the lower handle and the inner round rod to move downward with the upper handle, and the clamping component to open freely outward; Step 2, install the screw to be installed and the gasket into the clamping component so that the head of the screw to be installed matches the installation head; Step 3, release the external force applied by the upper handle and the lower handle, push the upper handle and the lower handle to move in two opposite directions, so that the inner wall of the outer catheter contacts the clamping component, squeezes the clamping component to shrink inward, holds the head of the screw to be installed and realizes self-locking; Step 4, the user initially aligns the device with the screw mounting hole and turns on the micro camera to capture an image; Step 5: According to the amount of movement of the device upward, leftward, and rightward indicated by the display module, the user moves the device so that the device can always be aligned with the screw mounting hole during the movement.

10. The method according to claim 9, characterized in that The method further comprises the steps of: Step 6: When the device sends out a proximity reminder message, the user reduces the speed of moving the device according to the reminder message and fixes the hand movement, and aligns the screw to be installed with the screw installation hole.

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