Precise clamp for crystal seed holder

Abstract

The utility model discloses a precise clamp for a crystal seed holder. The precise clamp comprises a rack, a positioning part and an expanding mechanism, the positioning part is fixed on the rack and is used for accurately limiting the O-shaped ring; the expanding mechanism comprises a moving part, an expanding air cylinder and a plurality of expanding claws, the expanding claws are connected to the output end of the expanding air cylinder in a circumferential array mode, the expanding air cylinder drives the expanding claws to synchronously move in the radial direction so as to evenly expand the O-shaped ring, and a cylinder body of the expanding air cylinder is installed at the output end of the moving part. And the moving part drives the positioning part to move along a preset path. According to the device, manual operation is replaced by mechanical automation, the problems of low efficiency, uneven expansion and positioning deviation are solved, and the assembly precision and efficiency are remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of automation equipment technology, and more specifically, to a precision fixture for a crystal seed holder. Background Technology

[0002] Currently, installing O-rings onto tubular parts is a common and crucial assembly process in industrial production. However, traditional installation methods rely primarily on manual labor. Workers must manually open the O-rings and precisely insert them into the designated positions on the tubular parts. This process is not only labor-intensive and time-consuming but also extremely inefficient. In large-scale production scenarios, manual installation is far slower than automated equipment, making it difficult to meet market demands for rapid product delivery and significantly limiting companies' capacity expansion and economic benefits.

[0003] The limitations of manual operation are also reflected in the difficulty of guaranteeing installation quality. Due to differences in operating techniques and force applied by different workers, even the same worker may experience fatigue and decreased precision after prolonged operation. For example, uneven force when opening O-rings can cause localized overstretching, leading to deformation and cracks, affecting sealing performance. Slight misalignment when inserting tubular parts can result in uneven stress on the O-rings, potentially causing leaks during subsequent use. Furthermore, manual installation cannot precisely quantify and control parameters such as installation pressure and stretching of O-rings, making it difficult to ensure consistent product quality. Simultaneously, manual operation struggles to standardize and regulate the installation process, failing to meet the demands of large-scale, high-quality production in modern industry. Utility Model Content

[0004] The purpose of this application is to provide a precision fixture for crystal seed and crystal holder, which has the advantages of improving assembly efficiency, ensuring expansion uniformity and positioning accuracy.

[0005] This application provides a precision fixture for a crystal seed holder, including a frame, a positioning part, and a spreading mechanism. The positioning part is fixedly mounted on the frame and is used to position an O-ring. The spreading mechanism includes a moving part, an expansion cylinder, and multiple expansion claws. The multiple expansion claws are connected in a circumferential array to the output end of the expansion cylinder. The expansion cylinder drives the expansion claws to move synchronously in the radial direction to spread the O-ring. The cylinder body of the expansion cylinder is mounted on the moving output end of the moving part. The moving part is mounted on the frame and drives the expansion cylinder to move towards the positioning part along a preset path.

[0006] Compared with existing technologies, the crystal seed holder precision fixture disclosed in this application has the following advantages: By setting up a frame, a stable support structure is provided for the entire expansion device, ensuring that each component can work collaboratively in a relatively fixed position; the positioning part can accurately determine the position of the O-ring, giving the radial expansion operation a clear target position and improving the accuracy of the operation; the expansion cylinder in the expansion mechanism drives multiple expansion claws to move synchronously along the radial direction, which can evenly expand the O-ring and avoid deformation and damage of the O-ring due to uneven force. Moreover, the moving part drives the expansion cylinder to move towards the positioning part along a preset path, realizing automatic approach to the O-ring and expansion operation. Compared with manual operation, this greatly improves production efficiency and reduces labor costs.

[0007] In one possible implementation, the end clamping surface of the expansion claw is provided with a slot for mating and engaging the O-ring. Compared with the prior art, the slot on the end clamping surface of the expansion claw, when mating and engaging the O-ring, can limit the O-ring during the opening process, preventing the O-ring from sliding or falling off when the expansion claw opens, further ensuring the stability and reliability of the opening operation, and improving the success rate of O-ring opening and subsequent installation.

[0008] In one possible implementation, the positioning unit includes a fixing frame with a positioning ring groove. The opening of the positioning ring groove faces upwards. The fixing frame also has an opening directly above the positioning ring groove, which allows the expansion claw to pass through and enter the positioning ring groove. The inner diameter of the positioning ring groove matches the inner diameter of the unopened O-ring, and the outer diameter of the positioning ring groove matches the outer diameter of the opened O-ring. Compared with the prior art, the positioning ring groove on the fixing frame of the positioning unit, with its upward-facing opening, facilitates the placement of the O-ring and provides circumferential positioning for it. The opening, located directly above the positioning ring groove, provides an accurate path for the expansion claw, allowing it to smoothly pass through the opening and enter the positioning ring groove, accurately contacting and opening the O-ring, thus enhancing the accuracy and efficiency of the opening device operation.

[0009] In one possible implementation, the positioning part further includes a plurality of barbed fixing claws, which are circumferentially fixed to the fixing frame and surround to form the positioning ring groove; the fixing claws and the expanding claws are arranged alternately in the circumferential direction. Compared with the prior art, the multiple barbed fixing claws, which are circumferentially fixed to the fixing frame and surround to form the positioning ring groove, can fix the O-ring from multiple directions. After the O-ring is placed in the positioning ring groove, the fixing claws can prevent the O-ring from shifting during the positioning process, especially during the opening operation, ensuring that the O-ring is stably placed in the positioning ring groove, ensuring the smooth progress of the opening operation, and improving the stability of the positioning.

[0010] In one possible implementation, the moving component includes a lifting cylinder, the cylinder body of which is mounted on the frame and located directly above the opening. The lifting end of the lifting cylinder is connected to the cylinder body of the expansion cylinder. Compared with the prior art, the moving component uses a lifting cylinder, with its cylinder body mounted on the frame and located directly above the opening, connected to the expansion cylinder body. This allows for precise control of the lifting height of the expansion cylinder, enabling the expansion claw to accurately reach the O-ring position and perform the opening operation of the O-ring, thus improving the automation level and operational accuracy of the opening device.

[0011] In one possible implementation, the end clamping surface of the expansion claw has an arc-shaped structure, the curvature of which matches the curvature of the inner wall of the O-ring. Compared with the prior art, the arc-shaped clamping surface of the expansion claw, with its curvature matching the inner wall curvature of the O-ring, allows for better contact between the arc-shaped clamping surface and the inner wall of the O-ring when it is opened. This results in more uniform force distribution on the O-ring, effectively preventing deformation and damage caused by excessive localized force, improving the quality of O-ring opening, and thus ensuring the subsequent sealing performance of the O-ring. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this application;

[0013] Figure 2 for Figure 1 Enlarged view of point A;

[0014] Explanation of reference numerals in the attached figures:

[0015] 1. Frame; 2. Positioning part; 21. Fixing frame; 22. Fixing claw; 23. Positioning ring groove; 3. Spreading mechanism; 31. Moving part; 32. Expansion cylinder; 33. Expansion claw; 331. Slot. Detailed Implementation

[0016] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0017] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0018] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0019] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0020] See Figure 1 and Figure 2 This application discloses a precision jig for a crystal seed holder, including a frame 1, a positioning part 2, and a spreading mechanism 3. The positioning part 2 is fixedly installed on the frame 1 and is used to position an O-ring. The spreading mechanism 3 includes a moving part 31, an expansion cylinder 32, and multiple expansion claws 33. The multiple expansion claws 33 are connected in a circumferential array to the output end of the expansion cylinder 32. The expansion cylinder 32 drives the expansion claws 33 to move synchronously in the radial direction to spread the O-ring. The cylinder body of the expansion cylinder 32 is installed on the moving output end of the moving part 31. The moving part 31 is installed on the frame 1 and drives the expansion cylinder 32 to move towards the positioning part 2 along a preset path.

[0021] Among them, the frame 1 serves as a supporting structure and can be formed by a metal welded frame; the expansion cylinder 32 can be a double-acting cylinder, and its output end is connected to the expansion claw 33 mounting plate through a flange, which can realize the reciprocating radial movement of the expansion claw 33; the number of expansion claws 33 is usually 4-6, preferably 4, and they are made of alloy steel and heat-treated.

[0022] As described above, by replacing manual operation with mechanical automation, the positioning accuracy and synchronous expansion issues in the O-ring opening process are resolved. The positioning unit 2 fixes the initial position of the O-ring, the moving part 31 drives the expansion part to precisely align, and the expansion cylinder 32 drives the multi-claw synchronous radial movement to complete the opening operation. This device ensures that the expansion force is uniform and controllable, avoiding local overload deformation of the O-ring. Furthermore, the entire opening process can be programmed for control, and the expansion parameters can be precisely set and repeatedly executed, effectively ensuring product quality consistency. Therefore, it not only significantly improves assembly efficiency but also eliminates quality fluctuations caused by manual operation.

[0023] In this embodiment, a groove 331 is provided on the end clamping surface of the expansion claw 33, which is used for matching and clamping the O-ring. Specifically, the shape and size of the groove 331 can be designed according to the cross-sectional shape of the O-ring, for example, a semi-circular groove structure can be used. That is, the groove 331 structure realizes the stable clamping of the O-ring, avoiding the problem of falling off or shifting due to uneven force in traditional manual operation; when the expansion claw 33 moves radially, the displacement of the O-ring is restricted by the groove 331, thereby ensuring the synchronicity and uniformity of the opening process. In subsequent processes, the O-ring is removed from the groove 331 of the expansion claw 33 by multiple mechanical claws and fitted onto the tubular part, that is, the gap between adjacent expansion claws 33 allows the mechanical claws to enter and grasp the O-ring.

[0024] In this embodiment, the positioning part 2 includes a fixing frame 21, on which a positioning ring groove 23 is provided. The opening of the positioning ring groove 23 is upward. The fixing frame 21 also has an opening located directly above the positioning ring groove 23, which allows the expansion claw 33 to pass through and enter the positioning ring groove 23. Specifically, the fixing frame 21 can be formed by metal welding, and its structural strength must meet the support and positioning requirements. The cross-sectional shape of the positioning ring groove 23 is preferably an arc-shaped structure that matches the O-ring. The diameter of the opening must be larger than the circumscribed circle diameter of the expansion claw 33 in its open state. The positioning ring groove 23 and the opening are coaxially designed, and their central axes coincide with the movement center point of the expansion claw 33. That is, through the coordinated action of the positioning ring groove 23 and the opening on the fixing frame 21, the precise positioning of the O-ring and the guiding insertion of the expansion claw 33 are achieved. The upward-opening positioning ring groove 23 facilitates the placement and limiting of the O-ring, while the opening provides a precise movement channel for the expansion claw 33. The inner diameter of the positioning ring groove 23 matches the inner diameter of the unopened O-ring, facilitating the positioning of the unopened O-ring; the outer diameter of the positioning ring groove 23 matches the outer diameter of the opened O-ring, preventing interference from the expansion claw 33 in opening the O-ring.

[0025] In this embodiment, the positioning part 2 further includes multiple hook-shaped fixing claws 22, which are circumferentially fixed to the fixing frame 21, forming a positioning ring groove 23. Specifically, the fixing claws 22 adopt a hook-shaped structure design, with their bending direction being the same as the opening direction of the positioning ring groove 23; the ends of the fixing claws 22 bend inward to form hooks, and an annular space is formed between the multiple hooks; the fixing claws 22 and the fixing frame 21 can be fixed by threaded connection or welding; the number of fixing claws 22 is usually set to 3-6, evenly distributed along the circumference to ensure uniform fixation of the O-ring. That is, by setting the hook-shaped fixing claws 22, the technical problem of the O-ring easily falling out of the positioning ring groove 23 during the expansion process can be effectively solved; the hook structure of the fixing claws 22 can limit the axial displacement of the O-ring, and the even distribution of multiple fixing claws 22 can provide a balanced constraint force. The fixing claws 22 and the expansion claws 33 are staggered circumferentially to prevent the fixing claws 22 from interfering with the radial movement of the expansion claws 33.

[0026] In this embodiment, the moving component 31 includes a lifting cylinder. The cylinder body of the lifting cylinder is mounted on the frame 1 and located directly above the opening. The lifting end of the lifting cylinder is connected to the cylinder body of the expansion cylinder 32. That is, the precise positioning of the expansion mechanism is achieved by the lifting cylinder, solving the problem of difficulty in controlling the vertical stroke by manual operation. The lifting cylinder drives the expansion claw 33 to move along a fixed path, ensuring that it can accurately reach the predetermined working position in the positioning ring groove 23 each time.

[0027] In this embodiment, the end clamping surface of the expansion claw 33 has an arc-shaped structure, and its curvature matches the curvature of the inner wall of the O-ring. That is, through the clamping surface design with matching curvature, the force on the inner wall of the O-ring is evenly distributed during the opening process, avoiding deformation caused by local stress concentration, and effectively solving the technical problems of O-ring twisting and uneven stretching caused by mismatched contact surface shapes during manual operation.

[0028] In the description of the embodiments of this application, it should be noted that the terms "inner" and "outer" and other terms indicating direction or positional relationship are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0029] In the description of this application, the references to terms such as "an embodiment," "some embodiments," "in this embodiment," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0030] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A crystal seed holder precision jig, characterized by, Includes frame, positioning unit, and spreading mechanism; The positioning part is fixedly installed on the frame and is used to position the O-ring; The opening mechanism includes a moving component, an expansion cylinder, and multiple expansion claws. The multiple expansion claws are connected to the output end of the expansion cylinder in a circumferential array. The expansion cylinder drives the expansion claws to move synchronously in the radial direction to open the O-ring. The cylinder body of the expansion cylinder is mounted on the moving output end of the moving component. The moving component is mounted on the frame and drives the expansion cylinder to move towards the positioning part along a preset path.

2. The precision fixture for crystal seed and crystal holder according to claim 1, characterized in that, The end clamping surface of the expansion claw is provided with a slot, which is used for matching and clamping O-rings.

3. The precision fixture for crystal seed and crystal holder according to claim 1, characterized in that, The positioning part includes a fixing frame, on which a positioning ring groove is provided. The opening of the positioning ring groove is upward. The fixing frame also has an opening located directly above the positioning ring groove. The opening is used for the expansion claw to pass through and enter the positioning ring groove. The inner circumferential wall diameter of the positioning ring groove matches the inner diameter of the unexpanded O-ring, and the outer circumferential wall diameter of the positioning ring groove matches the outer diameter of the expanded O-ring.

4. The precision fixture for crystal seed and crystal holder according to claim 3, characterized in that, The positioning part also includes a plurality of hook-shaped fixing claws, which are circumferentially fixed on the fixing frame and form the positioning ring groove around it; the fixing claws and the expansion claws are arranged alternately in the circumferential direction.

5. The precision fixture for crystal seed and crystal holder according to claim 3, characterized in that, The moving component includes a lifting cylinder, the cylinder body of which is mounted on the frame and located directly above the opening, and the lifting end of the lifting cylinder is connected to the cylinder body of the expansion cylinder.

6. The precision fixture for crystal seed and crystal holder according to claim 1, characterized in that, The end clamping surface of the expansion claw has an arc-shaped structure, and its curvature matches the inner wall curvature of the O-ring.

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