A composite tube clamping structure and clamping fixture

Abstract

This utility model provides a composite tube clamping structure and clamping fixture, belonging to the field of clamping structures. It includes a hollow locking tube placed inside the tube to be clamped. A through groove penetrates the inner and outer walls of the locking tube, with one end of the through groove connected to one end face of the locking tube. The locking post is conical and located inside the locking tube. A pull rod is fixedly installed on one end face of the locking post, extending outward from the locking tube. The pull rod causes the locking post to slide against the locking tube, pressing the outer wall of the locking tube against the inner wall of the tube to be clamped. With this design, when the locking tube is inserted into the tube to be clamped, pulling the pull rod moves the locking post outward. Due to the through groove, the locking tube can expand outward to lock the tube. The force is evenly distributed throughout the tube, preventing damage and ensuring the performance of the tube being clamped.

Description

Technical Field

[0001] This utility model belongs to the field of clamping structures, and in particular relates to a composite material round tube clamping structure and clamping fixture. Background Technology

[0002] During the production or testing of composite round tube products, their ends need to be clamped and fixed. Common clamping methods are divided into internal clamping and external clamping. Internal clamping applies force outward from the inner wall of the tube to support it and achieve a fixed effect. External clamping applies force inward from the outer perimeter of the tube, either wrapping around it or using multiple evenly distributed points, to achieve a fixing effect. Currently, both internal and external clamping apply force to the round tube through point contact, which can easily lead to product damage and performance degradation. Utility Model Content

[0003] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a composite tube clamping structure and clamping fixture to solve the problem that the current internal and external clamping methods apply force to the tube through point contact, which can easily lead to product damage and performance degradation.

[0004] To achieve the above and other related objectives, this utility model provides a composite material circular tube clamping structure, the clamping structure comprising: A locking tube, which is hollow, has a first opening and a second opening at its two ends, the diameter of the first opening being larger than the diameter of the second opening, and is placed inside a cylindrical tube to be clamped. A through groove, which penetrates the inner and outer walls of the locking tube, and one end of the through groove is connected to one end face of the locking tube. The locking post is conical, with a first end face and a second end face at its two ends. The diameter of the first end face is larger than the diameter of the second end face. The locking post is located inside the locking tube, with the first end face close to the first opening and the second end face close to the second opening. A pulling rod is fixedly installed on one end face of the locking column. The pulling rod extends outward from the locking tube. The pulling rod drives the locking column to slide with the locking tube and presses the outer wall of the locking tube against the inner wall of the round tube to be clamped.

[0005] Alternatively, the diameter of the first opening is a, and the diameter of the second end face is b. <a。

[0006] Alternatively, the diameter of the first end face is c, and the diameter of the second opening is d. <c<a。

[0007] As an optional solution, the number of through slots is at least two, and the at least two through slots are arranged in a circular array around the center line of the locking tube.

[0008] As an optional solution, the clamping structure also includes an outer blocking block; One end of the outer sleeve blocking block is provided with a groove, the diameter of which is greater than or equal to the outer diameter of the circular tube to be clamped; The locking tube is located within the groove, and the round tube to be clamped is located between the locking tube and the side wall of the groove; The pull rod passes through the bottom wall of the groove and extends out of the outer sleeve blocking block.

[0009] As an optional solution, the outer wall of the pull rod is threaded, the outer sleeve blocking block has a nut, the nut is threadedly connected to the pull rod, and the nut fits against the side wall of the outer sleeve blocking block.

[0010] As an optional solution, the bottom wall of the groove is provided with a through hole, and the outer diameter of the through hole is greater than or equal to the outer diameter of the pull rod.

[0011] Alternatively, the end face of the cylindrical tube to be clamped may abut against the bottom wall of the groove.

[0012] As an optional solution, the end face of the pull rod is provided with an anti-rotation groove for locking the rotation of the pull rod.

[0013] This utility model also provides a clamping fixture, including the above-mentioned composite tube clamping structure. The clamping fixture includes two clamping structures, which are symmetrically arranged at both ends of the tube to be clamped.

[0014] As described above, the composite tube clamping structure and clamping fixture of this utility model have at least the following beneficial effects: 1. The locking tube in this application, when inserted into the round tube to be clamped, moves the locking column outward by pulling the pulling rod. Due to the presence of the through groove, the locking tube can expand outward to lock the round tube to be clamped. The force is evenly distributed around the tube, avoiding damage to the round tube and ensuring the performance of the round tube to be clamped. 2. This application involves creating threads on the outer wall of the pulling rod and allowing the pulling rod to pass through the outer sleeve blocking block. Rotating the nut allows the pulling rod to move outward, thereby moving the locking column outward, which facilitates locking the round tube to be clamped. Attached Figure Description

[0015] Figure 1 The diagram shown is a structural schematic of this utility model. Figure 2 The diagram shown is a structural schematic of this utility model. Figure 3The diagram shown is a structural schematic of the locking tube of this utility model; Figure 4 The diagram shown is a structural schematic of the locking column and the pulling rod of this utility model; Figure 5 The diagram shown is an exploded view of the structure of this utility model.

[0016] In the diagram: 1. Locking tube; 2. Round tube to be clamped; 3. Through groove; 4. Locking column; 5. Pulling rod; 6. Outer blocking block; 7. Groove; 8. Thread; 9. Nut; 10. Through hole; 11. Anti-rotation groove. Detailed Implementation

[0017] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0018] Please see Figures 1 to 5 It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and are not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0019] The following embodiments are for illustrative purposes only. These embodiments can be combined and are not limited to the content shown in any single embodiment below.

[0020] In this embodiment, please refer to Figures 1 to 5 This utility model provides a composite material circular tube clamping structure, the clamping structure comprising: A locking tube, which is hollow, has a first opening and a second opening at its two ends, the diameter of the first opening being larger than the diameter of the second opening, and is placed inside a cylindrical tube to be clamped. A through groove, which penetrates the inner and outer walls of the locking tube, and one end of the through groove is connected to one end face of the locking tube. Because of the presence of the through groove, the outer wall of the locking tube can expand outward to lock the inner wall of the round tube to be clamped. The locking post is conical, with a first end face and a second end face at its two ends. The diameter of the first end face is larger than the diameter of the second end face. The locking post is located inside the locking tube, with the first end face close to the first opening and the second end face close to the second opening. The diameter of the first opening is a, and the diameter of the second end face is b. <a; The diameter of the first end face is c, and the diameter of the second opening is d. <c<a; A pulling rod is fixedly installed on one end face of the locking column and on the second end face. The pulling rod extends outward from the locking tube. The pulling rod drives the locking column to slide with the locking tube and presses the outer wall of the locking tube against the inner wall of the round tube to be clamped.

[0021] When locking the round tube to be clamped, place the locking tube inside the round tube to be clamped, and place the locking column inside the locking tube, so that the second end face and the second opening are located closer to the opening of the round tube to be clamped. By pulling the rod, the locking column is moved outward of the round tube to be clamped, so that the outer wall of the locking tube can expand outward to lock the inner wall of the round tube to be clamped.

[0022] In this embodiment, please refer to Figures 1 to 5 The number of through slots is at least two, and the at least two through slots are arranged in a circular array around the center line of the locking tube.

[0023] In this embodiment, a portion of the through groove can penetrate one end face of the locking tube, while another portion of the through groove can penetrate the other end face of the locking tube, which can further make the locking tube easier to expand.

[0024] In this embodiment, please refer to Figures 1 to 5 The clamping structure also includes an outer blocking block; One end of the outer sleeve blocking block is provided with a groove, the diameter of which is greater than or equal to the outer diameter of the circular tube to be clamped; The locking tube is located within the groove, and the round tube to be clamped is located between the locking tube and the side wall of the groove; The pulling rod passes through the bottom wall of the groove and extends out of the outer sleeve blocking block. The bottom wall of the groove has a through hole, the outer diameter of which is greater than or equal to the outer diameter of the pulling rod. The pulling rod passes through the through hole to achieve penetration through the bottom wall of the groove. The outer wall of the pull rod is threaded, and the outer sleeve blocking block has a nut. The nut is threadedly connected to the pull rod, and the nut fits against the side wall of the outer sleeve blocking block. The end face of the cylindrical tube to be clamped abuts against the bottom wall of the groove; The end face of the pull rod is provided with an anti-rotation groove for locking the rotation of the pull rod. The anti-rotation groove can be a square groove, a straight groove, a cross-shaped groove, a hexagonal groove, etc. Taking a square groove as an example, when the nut is turned, in order to prevent the pull rod from rotating synchronously, the locking tool (i.e., the square rod) is inserted into the anti-rotation groove. This prevents the pull rod from rotating with the nut, allowing the pull rod to extend outward and drive the locking column to move outward of the cylindrical tube to be clamped.

[0025] By using the outer sleeve blocking block, when the locking column moves outward to the cylindrical tube to be clamped, the bottom wall of the groove abuts against the side wall of the cylindrical tube to be clamped, which allows the locking tube to remain inside the cylindrical tube to be clamped, ensuring the effectiveness of the locking. At the same time, by using the thread and nut, the locking column can be moved outward by turning the nut, so that the locking tube expands outward to lock the cylindrical tube to be clamped. When processing a cylindrical tube, the clamps of the processing equipment (such as a robotic arm) can be clamped outside the outer retaining block.

[0026] A clamping fixture includes two clamping structures as described above, which are symmetrically arranged at both ends of the cylindrical tube to be clamped.

[0027] By setting clamping structures at both ends of the cylindrical tube to be clamped, it is possible to ensure uniform force on both sides of the cylindrical tube.

[0028] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A composite material circular tube clamping structure, characterized in that, The clamping structure includes: A locking tube, which is hollow, has a first opening and a second opening at its two ends, the diameter of the first opening being larger than the diameter of the second opening, and is placed inside a cylindrical tube to be clamped. A through groove, which penetrates the inner and outer walls of the locking tube, and one end of the through groove is connected to one end face of the locking tube. The locking post is conical, with a first end face and a second end face at its two ends. The diameter of the first end face is larger than the diameter of the second end face. The locking post is located inside the locking tube, with the first end face close to the first opening and the second end face close to the second opening. A pulling rod is fixedly installed on one end face of the locking column. The pulling rod extends outward from the locking tube. The pulling rod drives the locking column to slide with the locking tube and presses the outer wall of the locking tube against the inner wall of the round tube to be clamped.

2. The composite cylindrical tube clamping structure according to claim 1, characterized in that, The diameter of the first opening is a, and the diameter of the second end face is b. <a。 3. The composite cylindrical tube clamping structure according to claim 2, characterized in that, The diameter of the first end face is c, and the diameter of the second opening is d. <c<a。 4. The composite circular tube clamping structure according to claim 1, characterized in that, The number of through slots is at least two, and the at least two through slots are arranged in a circular array around the center line of the locking tube.

5. The composite cylindrical tube clamping structure according to claim 1, characterized in that, The clamping structure also includes an outer blocking block; One end of the outer sleeve blocking block is provided with a groove, the diameter of which is greater than or equal to the outer diameter of the circular tube to be clamped; The locking tube is located within the groove, and the round tube to be clamped is located between the locking tube and the side wall of the groove; The pull rod passes through the bottom wall of the groove and extends out of the outer sleeve blocking block.

6. The composite cylindrical tube clamping structure according to claim 5, characterized in that, The outer wall of the pull rod is threaded, and the outer sleeve blocking block has a nut. The nut is threadedly connected to the pull rod, and the nut fits against the side wall of the outer sleeve blocking block.

7. The composite material circular tube clamping structure according to claim 5, characterized in that, The bottom wall of the groove has a through hole, and the outer diameter of the through hole is greater than or equal to the outer diameter of the pull rod.

8. The composite cylindrical tube clamping structure according to claim 1, characterized in that, The end face of the cylindrical tube to be clamped abuts against the bottom wall of the groove.

9. A composite material circular tube clamping structure according to claim 6, characterized in that, The end face of the pull rod is provided with an anti-rotation groove for locking the rotation of the pull rod.

10. A clamping fixture, comprising the composite tube clamping structure as described in any one of claims 1-9, characterized in that, The clamping fixture includes two clamping structures, which are symmetrically arranged at both ends of the cylindrical tube to be clamped.

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