Hoop structure

Abstract

The utility model discloses a hoop structure in the technical field of connecting devices. The clamping device comprises a first arc-shaped clamping plate and a second arc-shaped clamping plate, the second end of the second arc-shaped clamping plate is of a double-layer structure comprising an outer-layer structure and an inner-layer structure, the outer-layer structure is movably connected to the inner-layer structure through a special-shaped spring, and the end, close to the second end of the first arc-shaped clamping plate, of the outer-layer structure extends to form a second clamping part. The end, away from the second end of the first arc-shaped clamping plate, of the outer layer structure extends to form a pressing part. The special-shaped spring, the outer-layer structure and the clamping structure are combined to form a locking structure, the first clamping part is matched with the second clamping part, when the outer-layer structure abuts against the inner-layer structure, the hoop is in a self-locking state, and only the pressing part of the outer-layer structure is higher than the outer surface, with the largest radius, of the second arc-shaped clamping plate. When the hoop is self-locked, the outer layer structure abuts against the inner layer structure, so that the locking structure is hardly exposed, and damage caused by interference is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of connecting devices, in particular to a clamp structure. Background Art

[0002] In the current clamp design, the clamp includes two arc-shaped clamps, one end of the two arc-shaped clamps is hinged, and the end that is not hinged is a movable end. A locking component is also provided, and the locking component is correspondingly arranged on the movable ends of the two arc-shaped clamps; when the two arc-shaped clamps clamp the workpiece, the locking components on the movable ends of the two arc-shaped clamps cooperate and connect, so that the clamp is in a locked state.

[0003] The problem with the prior art is that, since the locking component is always arranged on the outer surface of the arc-shaped clamp, there is a risk of physical interference with the locking component during use, resulting in damage to the locking component, thereby affecting the overall locking performance of the clamp and affecting the reliability of the clamp. Utility Model Content

[0004] In order to overcome the problem that the locking components of the existing clamp structure are easily damaged, thus affecting the overall locking performance of the clamp, the utility model provides a clamp structure.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] The hoop structure comprises a first arc-shaped clamping plate and a second arc-shaped clamping plate. The first end of the first arc-shaped clamping plate and the first end of the second arc-shaped clamping plate are hinged. The second end of the first arc-shaped clamping plate and the second end of the second arc-shaped clamping plate are detachably connected through a locking structure. The second end of the second arc-shaped clamping plate is a double-layer structure comprising an outer layer structure and an inner layer structure. The outer layer structure is movably connected to the inner layer structure through a special-shaped spring. The outer layer structure extends to both ends. One end of the outer layer structure close to the second end of the first arc-shaped clamping plate extends to form a second clamping portion. The first clamping portion is correspondingly arranged at the second end of the first arc-shaped clamping plate. The first clamping portion and the second clamping portion cooperate to form a clamping structure. One end of the outer layer structure away from the second end of the first arc-shaped clamping plate extends to form a pressing portion; the special-shaped spring includes an elastic arm, one end of the elastic arm is hinged to the end of the outer layer structure away from the second end of the arc-shaped clamping plate, and the other end is hinged to the middle part of the inner layer structure; the special-shaped spring, the outer layer structure and the clamping structure are combined to form a locking structure, and the first clamping portion cooperates with the second clamping portion, and when the outer layer structure abuts against the inner layer structure, the clamp is in a self-locking state, and only the pressing portion of the outer layer structure is higher than the outer surface with the largest radius of the second arc-shaped clamping plate; pushing the pressing portion in the reverse assembly direction can drive the outer layer structure to move, thereby releasing the cooperation between the first clamping portion and the second clamping portion.

[0007] In the present application, the second end of the second arc-shaped clamping plate is arranged in layers, and the outer structure is movably connected to the inner structure. When the clamp is self-locking, the outer structure abuts against the inner structure, so that the locking structure is rarely exposed to avoid damage due to interference; specifically, the locking structure includes a special-shaped spring, an outer structure and a clamping structure, the special-shaped spring connects the outer structure and the inner structure, a second clamping part is arranged at one end of the outer structure for matching and connecting with the first clamping part on the second end of the first arc-shaped clamping plate, and a pressing part is arranged at the other end for driving and applying force to the outer structure, and the outer structure is connected to the inner structure through the elastic arm of the special-shaped spring; the clamp structure The structure includes a self-locking state to achieve clamping and fixing of pipes, etc. When the first clamping part and the second clamping part cooperate and the outer layer structure abuts against the inner layer structure, the clamp is in a self-locking state under the action of the clamping structure and the special-shaped spring, and the first arc-shaped clamp plate and the second arc-shaped clamp plate are relatively fixed. Only the pressing part of the outer layer structure is higher than the outer surface with the largest radius of the second arc-shaped clamp plate, so as to facilitate the release of the self-locking state of the clamp; pushing the pressing part in the reverse assembly direction can drive the outer layer structure to move, thereby releasing the cooperation between the first clamping part and the second clamping part, so that the first arc-shaped clamp plate and the second arc-shaped clamp plate of the clamp are opened, which is convenient for its fixed installation.

[0008] In some embodiments, the special-shaped spring is formed by bending a metal rod as a whole, and has two parallel elastic arms. The middle of the spring is arranged perpendicular to the elastic arm as the first hinge end, and the end of the elastic arm away from the middle of the spring is bent to one side as the second hinge end.

[0009] In this embodiment, the special-shaped spring is formed by bending a metal rod in one piece, and has a simple structure and occupies a small space; specifically, the middle of the spring serves as the first hinge end, and the end of the elastic arm away from the middle of the spring, that is, the end of the elastic arm serves as the second hinge end. The two ends respectively realize the hinge connection between the special-shaped spring and the outer structure, and the special-shaped spring and the inner structure.

[0010] In some embodiments, the end of each elastic arm is bent toward the other elastic arm to form a second hinged end, and spring insertion holes are provided on both sides of the inner structure for the second hinged end to be inserted into and hinged; a spring tenon is provided on the inner surface of one end of the outer structure away from the second end of the first arc-shaped splint for the first hinged end to be inserted into and hinged.

[0011] In this embodiment, based on the aforementioned special-shaped spring structure, the middle part of the spring serves as a complete end, and is preferably hinged by a spring tenon to facilitate the installation, connection and fixation of the middle part of the spring; based on the fact that the outer layer structure can be processed independently, it is convenient to set the spring tenon. Here, the outer layer structure is preferably set with a spring tenon, that is, one end of the middle section of the spring is hinged to the outer layer structure.

[0012] In some embodiments, spring closing balls are provided on both sides of the inner layer structure. When the clamp is in a self-locking state, the elastic arm is located on the side of the spring closing ball close to the center of the clamp, and the spring closing ball limits the rotation of the outer layer structure away from the center of the clamp.

[0013] In this embodiment, spring closing balls are provided on both sides of the inner structure. When the clamp is self-locking, the spring closing balls are located on the outside of the elastic arm, further preventing the elastic arm from moving outward, that is, preventing the outer structure from rotating away from the center of the clamp, that is, preventing the outer structure from opening, that is, preventing the clamp from self-locking and unlocking.

[0014] In some embodiments, a groove or a bump is formed at the first end of the first arc-shaped clamping plate, a bump or a groove is correspondingly provided at the first end of the second arc-shaped clamping plate, and the first end of the first arc-shaped clamping plate and the first end of the second arc-shaped clamping plate are connected by a pin.

[0015] In this embodiment, the first end of the first arc-shaped clamping plate and the first end of the second arc-shaped clamping plate are respectively formed into grooves or protrusions to achieve a snap-fit ​​connection between the two, and then the first end of the first arc-shaped clamping plate and the first end of the second arc-shaped clamping plate are connected by a pin. The connection structure is simple and avoids exposure of the connecting parts, thereby improving the overall integrity.

[0016] In some embodiments, the first arc-shaped splint and the second arc-shaped splint are both semicircular splints.

[0017] In this embodiment, preferably, both the first arc-shaped clamping plate and the second arc-shaped clamping plate are semicircular clamping plates, and only the first arc-shaped clamping plate and the second arc-shaped clamping plate are needed to realize the opening and closing of the clamp.

[0018] In some embodiments, both axial sides of the first arc-shaped clamping plate and the second arc-shaped clamping plate extend inward to form a limiting portion.

[0019] In this embodiment, both axial sides of the first arc-shaped clamping plate and the second arc-shaped clamping plate extend inward to form a limiting portion to cooperate and limit the joint surface of the fixed pipe.

[0020] In some embodiments, the second engaging portion includes a through hole disposed on the extension section of the outer layer structure along the thickness direction, and the first engaging portion includes a correspondingly disposed locking column.

[0021] In this embodiment, the second engaging portion includes a locking hole, which is arranged on the extension section of the outer shell structure, and is extended to form the second engaging portion in combination with the end of the outer layer structure close to the second end of the first arc-shaped clamping plate, so that the locking hole is arranged on the side of the outer layer structure close to the second end of the first arc-shaped clamping plate, and the first engaging portion includes a locking column correspondingly arranged on the first arc-shaped clamping plate. In this way, on the one hand, the structural integrity of the clamp in the self-locking state is further guaranteed, and on the other hand, the locking hole can be used to confirm whether the locking column is in place from the outside, which is convenient for the implementation of the clamp structure.

[0022] The beneficial effects of the utility model are:

[0023] 1. The second end of the second arc-shaped clamping plate is arranged in layers, the outer structure and the inner structure are movably connected by a special-shaped spring, and the outer structure and the second end of the first arc-shaped clamping plate are connected by a snap-fit ​​structure. When the clamp is self-locking, the outer structure abuts against the inner structure, so that the locking structure is rarely exposed, avoiding damage due to interference.

[0024] 2. The special-shaped spring is formed by bending a metal rod in one piece, which is easy to implement; a spring closing ball is also added to improve the anti-interference performance of the clamp; the first arc-shaped clamp and the second arc-shaped clamp are connected by pins, which is easy to implement, the structure is simpler and the appearance is smooth.

[0025] 3. The locking structure consists of a locking hole and a locking column. The locking hole is a through hole along the thickness direction of the extended section of the outer structure. On the one hand, the structural integrity of the clamp is high in the self-locking state. On the other hand, the locking hole can be used to confirm whether the locking column is in place, which facilitates the implementation of the self-locking process of the clamp. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The use process of the clamp structure provided by the utility model is schematically shown Figure 1 ;

[0027] Figure 2 The use process of the clamp structure provided by the utility model is schematically shown Figure 2 ;

[0028] Figure 3 The use process of the clamp structure provided by the utility model is schematically shown Figure 3 ;

[0029] Figure 4 The use process of the clamp structure provided by the utility model is schematically shown Figure 4 ;

[0030] Figure 5 This is a schematic diagram of the overall structure of the clamp structure provided by the utility model in a self-locking state;

[0031] Figure 6 This is a schematic diagram of the overall structure of the second arc-shaped clamping plate in the clamp structure provided by the utility model;

[0032] Figure 7 This is a schematic diagram of the overall structure of the outer layer structure of the hoop structure provided by the utility model;

[0033] Figure 8 This is a schematic diagram of the overall structure of the special-shaped spring in the clamp structure provided by the utility model;

[0034] Fig. 9This is a schematic diagram of the overall structure of the first arc-shaped clamping plate in the clamp structure provided by the utility model.

[0035] Marked in the figure are, 1-first arc-shaped clamping plate, 10-first clamping part, 2-second arc-shaped clamping plate, 20-second clamping part, 3-special-shaped spring, 31-elastic arm, 32-first hinged end, 33-second hinged end, 4-outer structure, 40-pressing part, 41-spring tenon, 42-yield groove, 43-spring stop, 44-tenon processing hole, 5-inner structure, 51-spring socket, 52-spring closing ball, 6-limiting part, 7-pipeline, 8-pin. DETAILED DESCRIPTION

[0036] The utility model is further described below in conjunction with the accompanying drawings.

[0037] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0038] like Figure 1-9 As shown, the utility model provides a clamp structure.

[0039] The hoop structure comprises a first arc-shaped splint 1 and a second arc-shaped splint 2. The first end of the first arc-shaped splint 1 and the first end of the second arc-shaped splint 2 are hinged. The second end of the first arc-shaped splint 1 and the second end of the second arc-shaped splint 2 are detachably connected through a locking structure. The second end of the second arc-shaped splint 2 is a double-layer structure comprising an outer layer structure 4 and an inner layer structure 5. The outer layer structure 4 is movably connected to the inner layer structure 5 through a special-shaped spring 3. The outer layer structure 4 extends to both ends. One end of the outer layer structure 4 close to the second end of the first arc-shaped splint 1 extends to form a second clamping portion 20. The second end of the first arc-shaped splint 1 is correspondingly provided with a first clamping portion 10. The first clamping portion 10 and the second clamping portion 20 cooperate to form a clamping structure. The outer layer structure 4 is away from the first One end of the second end of the arc-shaped clamp 1 extends to form a pressing portion 40; the special-shaped spring includes an elastic arm 31, one end of the elastic arm 31 is hinged to the end of the outer layer structure 4 away from the second end of the arc-shaped clamp, and the other end is hinged to the middle of the inner layer structure 5; the special-shaped spring, the outer layer structure 4 and the clamping structure are combined to form a locking structure, the first clamping portion 10 cooperates with the second clamping portion 20, and when the outer layer structure 4 abuts against the inner layer structure 5, the clamp is in a self-locking state under the action of the clamping structure and the special-shaped spring 3, and only the pressing portion 40 of the outer layer structure 4 is higher than the outer surface with the largest radius of the second arc-shaped clamp 2; pushing the pressing portion 40 in the reverse assembly direction can drive the outer layer structure 4 to move, thereby releasing the cooperation between the first clamping portion 10 and the second clamping portion 20.

[0040] In this embodiment, the second end of the second arc-shaped clamping plate 2 is arranged in layers, and the outer layer structure is movably connected to the inner layer structure 5. When the clamp is self-locking, the outer layer structure 4 abuts against the inner layer structure 5, so that the locking structure is rarely exposed to avoid damage due to interference; specifically, the locking structure includes a special-shaped spring 3, an outer layer structure 4 and a clamping structure. The special-shaped spring 3 connects the outer layer structure 4 and the inner layer structure 5. A second clamping portion 20 is provided at one end of the outer layer structure 4 for matching and connecting with the first clamping portion 10 on the second end of the first arc-shaped clamping plate 1, and a pressing portion 40 is provided at the other end for driving and applying force to the outer layer structure 4. The outer layer structure 4 is connected to the inner layer structure 5 through the elastic arm 31 of the special-shaped spring 3. Layer structure 5; the clamp structure includes a self-locking state to achieve clamping and fixing of the pipe 7, etc. When the first clamping part 10 and the second clamping part 20 cooperate, and the outer layer structure 4 abuts against the inner layer structure 5, the clamp is in a self-locking state, the first arc-shaped clamp 1 and the second arc-shaped clamp 2 are relatively fixed, and only the pressing part 40 of the outer layer structure 4 is higher than the outer surface with the largest radius of the second arc-shaped clamp 2, so as to facilitate the release of the self-locking state of the clamp; pushing the pressing part 40 in the reverse assembly direction can drive the outer layer structure 4 to move, thereby releasing the cooperation between the first clamping part 10 and the second clamping part 20, so that the first arc-shaped clamp 1 and the second arc-shaped clamp 2 of the clamp are opened, which is convenient for its fixed installation.

[0041] In this embodiment, the special-shaped spring 3 is formed by bending a metal rod as a whole, and has two elastic arms 31 arranged in parallel. The middle of the spring is perpendicular to the elastic arm 31 and is arranged as the first hinge end 32, and the end of the elastic arm 31 away from the middle of the spring is bent to one side as the second hinge end 33. The special-shaped spring 3 is formed by bending a metal rod as a whole, and has a simple structure and occupies a small space; specifically, the middle of the spring is used as the first hinge end 32, and the end of the elastic arm 31 away from the middle of the spring, that is, the end of the elastic arm 31, is used as the second hinge end 33. The two ends respectively realize the hinge connection between the special-shaped spring 3 and the outer layer structure 4, and the special-shaped spring 3 and the inner layer structure 5.

[0042] More specifically, the elastic arm 31 of the special-shaped spring 3 in this embodiment includes two straight segments connected to each other, the two straight segments are connected to form a bend, and the bend opening in the middle of the elastic arm 31 faces the outer structure 4. Obviously, the elastic arm 31 can also be in the form of a curved rod, as long as it can provide appropriate elastic force for the clamp structure to self-lock.

[0043] Furthermore, in this embodiment, the end of each elastic arm 31 is bent toward the direction close to the other elastic arm 31 to form a second hinged end 33, and spring insertion holes 51 are provided on both sides of the inner layer structure 5 for the second hinged end 33 to be inserted and hinged; a spring tenon 41 is provided on the inner surface of the end of the outer layer structure 4 away from the second end of the first arc-shaped clamping plate 1 for the first hinged end 32 to be inserted and hinged. Based on the aforementioned special-shaped spring 3 structure, the middle part of the spring is used as a complete end, and is preferably hinged by a spring tenon 41, which is convenient for the installation, connection and fixation of the middle part of the spring; based on the fact that the outer layer structure 4 can be processed independently, it is convenient to set the spring tenon 41. Here, the outer layer structure 4 is preferably provided with a spring tenon 41, that is, one end of the middle section of the spring is hinged to the outer layer structure 4.

[0044] In this embodiment, a clearance groove 42 is further provided on the outer layer structure 4 to allow for the installation of the second hinged end 33 when the clamp structure is self-locking; a spring stop 43 is also provided to allow the elastic arm 31 of the special-shaped spring 3 to abut against the auxiliary support limit when the clamp structure is self-locking; in the axial direction of the middle section of the spring, that is, in the axial direction of the first hinged end 32, tenon processing holes 44 are provided on both sides of the outer layer structure 4 to facilitate the processing of the spring tenon 41; in this embodiment, two spring tenons 41 are provided along the axial direction of the first hinged end 32.

[0045] In this embodiment, spring closing clamping balls 52 are also provided on both sides of the inner structure 5. When the clamp is in the self-locking state, the elastic arm 31 is located on the side of the spring closing clamping ball 52 close to the center of the clamp, and the spring closing clamping ball 52 forms a limit for the rotation of the outer structure 4 away from the center of the clamp. Spring closing clamping balls 52 are also provided on both sides of the inner structure 5. When the clamp is self-locking, the spring closing clamping ball 52 is located outside the elastic arm 31, further preventing the elastic arm 31 from moving outward, that is, preventing the outer structure 4 from rotating away from the center of the clamp, that is, preventing the outer structure 4 from opening, that is, preventing the clamp from self-locking and unlocking.

[0046] In this embodiment, the first end of the first arc-shaped clamping plate 1 and the first end of the second arc-shaped clamping plate 2 are respectively formed with grooves or protrusions to achieve a snap-fit ​​connection between the two, and then the first end of the first arc-shaped clamping plate 1 and the first end of the second arc-shaped clamping plate 2 are connected by a pin 8. The connection structure is simple and avoids exposure of the connecting parts, thereby improving the overall integrity.

[0047] In the present embodiment, the first arc-shaped splint 1 and the second arc-shaped splint 2 are both semicircular splints. Preferably, the first arc-shaped splint 1 and the second arc-shaped splint 2 are both semicircular splints, and only the first arc-shaped splint 1 and the second arc-shaped splint 2 are needed to realize the opening and closing of the clamp. Obviously, in some embodiments, the arc-shaped splint is not limited to a semicircular shape, for example, the first arc-shaped splint 1 is a quarter circle, and the second arc-shaped splint 2 is a three-quarter circle. The second arc-shaped splint 2 includes two parts, a semicircular splint and a quarter-circular splint, which are interconnected. The quarter-circular splint is hinged on the semicircular splint as the second end of the second arc-shaped splint 2, and the end of the semicircular splint away from the quarter-circular splint serves as the first end of the second arc-shaped splint 2.

[0048] In this embodiment, preferably, both the first arc-shaped clamping plate 1 and the second arc-shaped clamping plate 2 are semicircular clamping plates, and only the first arc-shaped clamping plate 1 and the second arc-shaped clamping plate 2 are needed to realize the opening and closing of the clamp.

[0049] In this embodiment, both the first arc-shaped clamping plate 1 and the second arc-shaped clamping plate 2 extend inwardly on both axial sides to form a limiting portion 6 to cooperate and limit the joint surface of the fixed pipe 7.

[0050] In this embodiment, the second engaging portion 20 includes a locking hole, which is a through hole arranged on the extension section of the outer layer structure 4 along the thickness direction, and the first engaging portion 10 includes a correspondingly arranged locking column. The second engaging portion 20 is a locking hole, which is arranged on the extension section of the outer shell structure. In combination with the aforementioned outer layer structure 4, one end of the outer layer structure 4 close to the second end of the first arc-shaped clamp 1 extends to form the second engaging portion 20. It can be obtained that the locking hole is arranged on the side of the outer layer structure 4 close to the second end of the first arc-shaped clamp 1, and the first engaging portion 10 is a correspondingly arranged locking column on the first arc-shaped clamp 1. In this way, on the one hand, the structural integrity of the clamp in the self-locking state is further guaranteed. On the other hand, the locking hole can be used to confirm whether the locking column is in place from the outside, which is convenient for the implementation of the clamp structure. Obviously, the second end of the first arc-shaped clamp 1 extends forward to form a locking column. In this embodiment, preferably, the thickness of the first arc-shaped clamp 1 where the locking column is located is consistent with the thickness of the inner layer structure 5 of the second arc-shaped clamp 2.

[0051] The assembly process of the clamp structure in this embodiment is as follows: 1. Connect the first arc-shaped splint 1 and the second arc-shaped splint 2 through the pin 8; 2. Insert the second hinged end 33 of the special-shaped spring 3 into the spring insertion hole 51 on both sides of the inner layer structure 5, and the middle part of the elastic arm 31 is bent and opened toward the outer layer structure 4; 3. The middle section of the spring, that is, the first hinged end 31, is inserted into the spring tenon 41 of the outer layer structure 4. Note that one side of the locking hole of the outer layer structure 4 is close to the locking column position of the first arc-shaped splint 1; 4. Use pliers to engage the two positions of the spring tenon 41 respectively, so that the spring tenon 41 wraps the first hinged end 31 of the special-shaped spring 3, that is, the middle section of the spring, to prevent the special-shaped spring 3 from falling out.

[0052] The use process of the clamp structure in this embodiment is as follows: 1. Open the first arc-shaped clamp plate 1 and the second arc-shaped clamp plate 2, and move the clamp to the position to be tightened; 2. Close the first arc-shaped clamp plate 1 and the second arc-shaped clamp plate 2; 3. Make the locking hole and the locking column cooperate with each other; 4. Take the matching point of the locking hole and the locking column as the rotation point, and the straight line from the rotation point to the spring tenon 41 as the force arm, press the pressing part 40 of the outer structure 4 to rotate the outer structure 4 until the special-shaped spring 3 and the spring closing ball 52 are interference fit, and after a "click" sound appears, the clamp structure is self-locked under the action of the self-locking of the force arm, and the force arm is below the outer surface of the clamp structure.

[0053] Advantages and features of the clamp structure in this embodiment: 1. After the clamp is locked, the locking structure is less exposed, the risk of interference is small, the protruding parts are greatly reduced, and it is closer to an integrated cylindrical shape, which is more beautiful; 2. In addition to the self-locking of the force arm brought by the special-shaped spring 3, a spring closing card ball 52 is added. The interference fit between the spring closing card ball 52 and the special-shaped spring 3 reduces the probability of the clamp structure being out of the self-locking state due to external interference; 3. When closed in place, the interference fit between the special-shaped spring 3 and the spring closing card ball 52 produces a "click" sound, which not only brings a more comfortable experience to the user, but also serves to remind the user that the closure is in place.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A hoop structure, comprising a first arc-shaped clamping plate (1) and a second arc-shaped clamping plate (2), wherein a first end of the first arc-shaped clamping plate (1) and a first end of the second arc-shaped clamping plate (2) are hinged, and a second end of the first arc-shaped clamping plate (1) and a second end of the second arc-shaped clamping plate (2) are detachably connected via a locking structure, wherein: The second end of the second arc-shaped clamping plate (2) is a double-layer structure including an outer layer structure (4) and an inner layer structure (5); the outer layer structure (4) is movably connected to the inner layer structure (5) via a special-shaped spring (3); the outer layer structure (4) extends to both ends; an end of the outer layer structure (4) close to the second end of the first arc-shaped clamping plate (1) extends to form a second clamping portion (20); a first clamping portion (10) is correspondingly arranged at the second end of the first arc-shaped clamping plate (1); the first clamping portion (10) and the second clamping portion (20) cooperate to form a clamping structure; an end of the outer layer structure (4) away from the second end of the first arc-shaped clamping plate (1) extends to form a pressing portion (40); The special-shaped spring (3) comprises an elastic arm (31), one end of the elastic arm (31) is hinged to an end of the outer layer structure (4) away from the second end of the first arc-shaped clamping plate (1), and the other end is hinged to the middle part of the inner layer structure (5); The special-shaped spring (3), the outer layer structure (4) and the clamping structure are combined to form a locking structure. When the first clamping portion (10) cooperates with the second clamping portion (20) and the outer layer structure (4) abuts against the inner layer structure (5), the clamp is in a self-locking state, and only the pressing portion (40) of the outer layer structure (4) is higher than the outer surface of the second arc-shaped clamping plate (2) with the largest radius; The pressing portion (40) is pushed in the reverse assembly direction to drive the outer layer structure (4) to move, thereby releasing the cooperation between the first engaging portion (10) and the second engaging portion (20).

2. The clamp structure according to claim 1, characterized in that: The special-shaped spring (3) is formed by bending a metal rod body in one piece and has two elastic arms (31) arranged in parallel. The middle of the spring is arranged perpendicular to the elastic arms (31) as a first hinge end (32), and one end of the elastic arm (31) away from the middle of the spring is bent to one side as a second hinge end (33).

3. The clamp structure according to claim 2, characterized in that: The end of each elastic arm (31) is bent toward the other elastic arm (31) to form a second hinged end (33), and spring insertion holes (51) are provided on both sides of the inner layer structure (5) for the second hinged end (33) to be inserted into and hinged; and a spring tenon (41) is provided on the inner surface of an end of the outer layer structure (4) away from the second end of the first arc-shaped clamping plate (1) for the first hinged end (32) to be inserted into and hinged.

4. The clamp structure according to claim 3, characterized in that: Spring closing clamping balls (52) are also provided on both sides of the inner layer structure (5). When the clamp is in a self-locking state, the elastic arm (31) is located on the side of the spring closing clamping ball (52) close to the center of the clamp, and the spring closing clamping ball (52) limits the rotation of the outer layer structure (4) away from the center of the clamp.

5. The clamp structure according to claim 1, characterized in that: A groove or a convex block is formed at the first end of the first arc-shaped clamping plate (1), and a convex block or a groove is correspondingly arranged at the first end of the second arc-shaped clamping plate (2). The first end of the first arc-shaped clamping plate (1) and the first end of the second arc-shaped clamping plate (2) are hingedly connected via a pin (8).

6. The clamp structure according to claim 1, characterized in that: The first arc-shaped clamping plate (1) and the second arc-shaped clamping plate (2) are both semicircular clamping plates.

7. The clamp structure according to claim 1, characterized in that: Both axial sides of the first arc-shaped clamping plate (1) and the second arc-shaped clamping plate (2) extend inwards to form a limiting portion (6).

8. The clamp structure according to any one of claims 1 to 7, characterized in that: The second locking portion (20) comprises a through hole arranged along the thickness direction on the extension section of the outer layer structure (4), and the first locking portion (10) comprises a correspondingly arranged locking column.

Images