An annular fixed clamp for convenient adjustment of inner diameter

Abstract

The present invention relates to the field of clamp technology, and discloses an annular fixed clamp with convenient inner diameter adjustment, comprising a clamp body, an upper connecting piece, a lower connecting piece, and a fastener, wherein the upper connecting piece and the lower connecting piece are used to connect two adjacent clamp bodies, so that the two adjacent clamp bodies can rotate relative to each other, the upper end spacing is constant, and the lower end spacing is adjustable. The annular fixed clamp with convenient inner diameter adjustment is convenient for adjusting the various clamp bodies distributed in an annular shape to have a consistent inclination by setting a clamp body that can rotate relative to each other and has an adjustable inclination, and is convenient for adjusting the tension of the inner walls of the two clamp bodies located at the ends with the surface of the base rod through the detection of a tension detection mechanism, thereby ensuring that the inner walls of the various clamp bodies distributed in an annular shape and with a consistent inclination are all tightened with the surface of the base rod, so that each clamp body can evenly provide an equal extrusion force to the surface of the base rod, thereby improving the fixing effect on the base rod and preventing the clamp from loosening or falling off during use.

Description

Technical Field

[0001] The invention relates to the technical field of clamps, in particular to an annular fixed clamp with an inner diameter that is convenient to adjust. Background Art

[0002] A clamp is a component that uses one material to hold or clamp another material. In the construction of power engineering, it is often necessary to install clamp components on various wire poles. Wire poles are columnar and conical, and different sizes of wire poles require different clamp models, which requires workers to spend a long time measuring and counting the clamp models required for each wire pole, thereby reducing work efficiency. The cost of preparing a variety of different types of clamps is high. In addition, if there is a deviation in the initial measurement work, resulting in the clamp used not matching the actual base pole size, the clamp will not be able to be put on the base pole or the inner wall of the clamp will not fit tightly with the surface of the base pole, affecting normal construction. In order to ensure the clamp's fixing effect on the base pole, improve work efficiency and reduce the cost of the clamp, a universal clamp component with adjustable taper is often used to fix the base pole.

[0003] The Chinese patent with publication number CN113006581A discloses an adjustable fixing clamp for pole towers, which fixes the front and rear clamps on the pole, uses nylon cable ties to make the limit plate close to the pole, and fixes the two ends of the nylon cable tie in the lock-type cable tie head, and uses a tension sensor to detect the slack of the nylon cable tie. The adjustable fixing clamp for pole towers can adjust the inclination of the limit plate by adjusting the length of the nylon cable tie, so that the limit plate can be close to the poles with different tapers, and realize the fixing of the clamp to the columnar pole tower with a fixed diameter or the conical pole tower with a fixed lower end diameter.

[0004] However, the slack warning function of the nylon cable tie can only work when the nylon cable tie is loose and causes the limit plate to loosen. When fixing the conical pole tower, the staff directly puts the front clamp and the rear clamp on the pole tower surface and fixes them. Since each limit plate can only be tangent to the pole tower surface but cannot be completely attached to the pole tower surface to achieve positioning, it is easy to cause the annular shell composed of the front clamp and the rear clamp to tilt during installation, and it is difficult for the staff to directly observe the slight tilt with the naked eye. In this case, even if the nylon cable tie is kept tight, the inclination of each limit plate is inconsistent and the contact position with the pole tower surface is inconsistent, resulting in uneven squeezing force from the limit plate on the pole tower surface. Since each limit plate and the pole tower are in a non-tensioned state, as the clamp bears other components connected to it for a long time and is affected by the natural environment, it is easy to cause the clamp to deviate, shake or even fall off sharply;

[0005] In addition, the front and rear ends of the clamp have constant diameters, which greatly limits the sizes of columnar poles and conical poles that can be fixed by the clamp, reducing the versatility of the clamp. Summary of the invention

[0006] 1. Technical issues to be resolved

[0007] In view of the shortcomings of the prior art, the present invention provides an annular fixed clamp with an easily adjustable inner diameter, which has the advantages of being easy to detect the tension state between the clamp and the surface of the base rod during installation and being able to fix base rods with different tapers and inner diameters. It solves the problems that the existing clamp cannot ensure the tension state between it and the surface of the base rod during installation and the base rods that can be fixed have a single size.

[0008] (II) Technical solution

[0009] In order to solve the technical problems that the existing clamp cannot ensure the tension state between the clamp and the base rod surface during installation and the base rod size that can be fixed is single, the present invention provides the following technical solutions:

[0010] An annular fixed clamp with convenient inner diameter adjustment comprises a clamp body, an upper connecting piece, a lower connecting piece, and a fastener, wherein the upper connecting piece and the lower connecting piece are used to connect two adjacent clamp bodies, so that the two adjacent clamp bodies can rotate relative to each other, the upper end spacing is constant, and the lower end spacing is adjustable, and the lower end spacings of the clamp bodies are kept consistent so that the inclinations of the clamp bodies distributed in a ring are consistent;

[0011] The fastener is used to connect the two clamp bodies at the ends, so that the clamp bodies are combined into a chain-type ring clamp with adjustable taper and inner diameter;

[0012] The two clamp bodies located at the ends are respectively provided with tension detection mechanisms for detecting the tension conditions of the inner walls of the corresponding clamp bodies and the surface of the base rod. When the inner walls of the two clamp bodies located at the ends are tightened with the surface of the base rod, the inner walls of the clamp bodies that are distributed in a ring shape and have the same inclination are tightened with the surface of the base rod.

[0013] Preferably, the clamp body includes a clamp single plate and a clamp fastening plate, the clamp single plate and the clamp fastening plate are both arc-shaped with the same size, spherical grooves are respectively provided on both sides of the clamp single plate and the upper and lower ends of one side of the clamp fastening plate, the upper connecting part includes a first connecting seat and a first steering ball, the first connecting seat is connected to the first steering ball through a first connecting column, the first steering balls are respectively rotatably assembled in the spherical grooves located at the upper end, and the two adjacent first connecting seats are rotatably matched.

[0014] Preferably, the lower connecting member includes a second connecting seat, a second steering ball, and a movable arm. The second connecting seat is connected to the second steering ball through a second connecting column. The second steering balls are rotatably assembled in the spherical grooves located at the lower end. One end of the movable arm is rotatably assembled on the second connecting seat, and the other ends of the two adjacent movable arms are rotatably matched together.

[0015] Preferably, the lower connecting member further comprises a positioning member, the positioning member comprises a fixed connecting rod, a third connecting seat, and a positioning screw, and the lower end and the upper end of the fixed connecting rod are fixedly connected to the third connecting seat and the positioning screw respectively;

[0016] The two adjacent movable arms are rotatably assembled on the third connecting seat, the surface of the first connecting seat is provided with a first circular hole, and the two adjacent first connecting seats are rotatably assembled on the positioning screw through the first circular hole and positioned by the first nut.

[0017] Preferably, the surface of the positioning screw is provided with a long groove, and the inner wall surface of the long groove is provided with a scale line for indicating the height of the first nut.

[0018] Preferably, the outer wall surfaces of the clamp fastening plates are respectively provided with limit brackets, and the surfaces of the limit brackets are provided with second circular holes;

[0019] The fastener includes a fastening screw, a third steering ball, and a mounting seat. The fastening screw is rotatably assembled on the limit bracket through the second circular hole and positioned by the second nut. The third steering ball and the mounting seat are respectively arranged at one end of the two fastening screws close to each other, and the third steering ball is rotatably assembled on the mounting seat.

[0020] Preferably, the tension detection mechanism comprises a tensioning member, a telescopic connecting rod, and a fifth connecting seat. The tensioning members are respectively provided at the upper and lower ends of the clamp fastening plate. The detection end and the driving end of the tensioning member are respectively slidably mounted on the inner side and the outer side of the clamp fastening plate. The driving end of the tensioning member is respectively rotatably mounted with the fifth connecting seat. The two fifth connecting seats are connected by the telescopic connecting rod.

[0021] The limiting bracket is provided with a limiting arc groove on one side close to the outer wall of the clamp fastening plate, and the tension condition of the corresponding clamp fastening plate and the base rod surface can be judged by the fitting state of the telescopic connecting rod and the inner wall of the limiting arc groove.

[0022] Preferably, the upper and lower ends of the clamp fastening plate are respectively provided with cavities, and the two sides of the cavity are respectively provided with an inner opening and an outer opening;

[0023] The tensioning member includes a detection plate, a driving plate, a connecting plate, a tensioning spring, and a fourth connecting seat. The detection plate and the driving plate are respectively slidably assembled at the inner opening and the outer opening. The fourth connecting seat is arranged at the end of the driving plate and is respectively rotatably matched with the fifth connecting seat. Connecting plates are respectively arranged on both sides of the detection plate. The two ends of the tensioning spring are respectively connected to the inner wall surface of the cavity and the surface of the connecting plate.

[0024] Preferably, the surface of one side of the detection plate away from the driving plate is arc-shaped, and when the tension spring is in a naturally extended state, the corresponding arc-shaped end of the detection plate protrudes from the inner opening, and when the arc-shaped ends of the two detection plates are respectively tangent to the arc surfaces where the corresponding inner openings are located, the outer rod surface of the telescopic connecting rod fits against the inner wall of the limiting arc groove.

[0025] Preferably, the inner sides of the clamp single plate and the clamp fastening plate are respectively and evenly provided with anti-slip grooves.

[0026] (III) Beneficial effects

[0027] Compared with the prior art, the present invention provides an annular fixed clamp with convenient inner diameter adjustment, which has the following beneficial effects:

[0028] 1. The annular fixed clamp with convenient inner diameter adjustment is convenient for adjusting the various clamp bodies distributed in an annular shape to have a consistent inclination by providing a clamp body that can rotate relatively and has an adjustable inclination. The inner walls of the two clamp bodies at the ends are conveniently adjusted to be tightened with the surface of the base rod through detection by a tension detection mechanism, thereby ensuring that the inner walls of the various clamp bodies distributed in an annular shape and with the same inclination are tightened with the surface of the base rod, so that each clamp body can evenly provide an equal extrusion force to the surface of the base rod, thereby improving the fixing effect on the base rod and preventing the clamp from loosening or falling off during use.

[0029] 2. The annular fixed clamp with convenient inner diameter adjustment can adjust the angle between two adjacent movable arms by adjusting the extension height of the positioning screw and using the first nut for positioning, thereby adjusting and fixing the distance between the lower ends of two adjacent clamp bodies, so that the inclination of each clamp body distributed in a ring shape is adjustable, which is convenient for stable fixation of base rods with different tapers and inner diameters, and greatly improves the universal performance of the clamp.

[0030] 3. The annular fixed clamp with convenient inner diameter adjustment judges the tension of the corresponding clamp fastening plate and the base rod surface by the fitting state of the outer rod surface of the telescopic connecting rod and the inner wall surface of the limiting arc groove. When the annular clamp is used to fix the base rod surface, as the inner surface of the clamp fastening plate gradually approaches the base rod surface, the detection plate is forced to retract into the cavity, driving the telescopic connecting rod to move. When the outer rod surface of the telescopic connecting rod is in contact with the inner wall surface of the limiting arc groove, the clamp single plates and the inner side surfaces of the clamp fastening plate with the same inclination that constitute the annular clamp are in contact with the base rod surface from top to bottom, effectively improving the stability of the annular clamp. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0032] Figure 2 It is an exploded schematic diagram of the upper connecting member and the lower connecting member of the present invention;

[0033] Figure 3 It is a schematic diagram of the structure of the upper connecting member and the lower connecting member of the present invention;

[0034] Figure 4 It is a schematic diagram of the structure of the clamp fastening plate of the present invention;

[0035] Figure 5 It is an exploded schematic diagram of the fastener of the present invention;

[0036] Figure 6 It is an explosion diagram of the tension detection mechanism of the present invention;

[0037] Figure 7 It is a partial cross-sectional schematic diagram of some components when the tension spring of the present invention is in a naturally extended state;

[0038] Figure 8 It is one of the partial cross-sectional schematic diagrams of some components when the inner side surface of the clamp fastening plate of the present invention and the surface of the base rod A are tightened;

[0039] Fig. 9 This is the second partial cross-sectional schematic diagram of some components when the inner side surface of the clamp fastening plate and the surface of the base rod A of the present invention are tightened.

[0040] In the figure: 1. clamp body; 11. clamp single plate; 12. clamp fastening plate; 121. limit bracket; 1211. limit arc groove; 2. upper connecting piece; 21. first connecting seat; 22. first steering ball; 3. lower connecting piece; 31. second connecting seat; 32. second steering ball; 33. movable arm; 34. positioning piece; 341. fixed connecting rod; 342. third connecting seat; 343. positioning screw; 4. fastener; 41. fastening screw; 42. third steering ball; 43. mounting seat; 5. tension detection mechanism; 51. tension piece; 511. detection plate; 512. drive plate; 513. connecting plate; 514. tension spring; 515. fourth connecting seat; 52. telescopic connecting rod; 53. fifth connecting seat. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] See also Figure 1 , a ring-shaped fixed clamp with convenient inner diameter adjustment, comprising a clamp body 1, an upper connecting piece 2, a lower connecting piece 3, and a fastener 4, wherein the upper connecting piece 2 and the lower connecting piece 3 are used to connect two adjacent clamp bodies 1, so that the two adjacent clamp bodies 1 can rotate relatively, and the upper end spacing is constant, and the lower end spacing is adjustable, so that the lower end spacing of each clamp body 1 can be kept consistent by adjusting each group of upper connecting pieces 2 and lower connecting pieces 3, so that the inclination of each clamp body 1 distributed in a ring is consistent, thereby ensuring that the base rod surface clamped by each clamp body 1 in the middle in a ring shape is subjected to uniform extrusion force from the clamp body 1 in all directions;

[0043] The fastener 4 is used to connect the two hoop bodies 1 at the end so that the hoop bodies 1 are combined into a chain-type annular hoop with adjustable taper and inner diameter, so that the formed annular hoop can be suitable for base rods of different calibers by increasing or decreasing the number of hoop bodies 1 and adjusting the fastening degree of the fastener 4. At the same time, the spacing between the lower ends of each hoop body 1 is adjusted. When the spacing between the upper and lower ends of each hoop body 1 is equal, each hoop body 1 is vertical, and the formed annular hoop is used to fix columnar base rods of different diameters. When the spacing between the upper and lower ends of each hoop body 1 is unequal, each hoop body 1 is inclined, and the formed annular hoop is used to fix conical base rods of different tapers, so that the hoop can be suitable for base rods of various models, greatly improving the versatility of the hoop.

[0044] The two clamp bodies 1 at the ends are respectively provided with tension detection mechanisms 5 for detecting the tension conditions of the inner walls of the corresponding clamp bodies 1 and the surface of the base rod, so that the staff can judge in real time whether the inner walls of the two clamp bodies 1 at the ends and the surface of the base rod are tensioned through the tension detection mechanisms 5 when installing the clamp. If the inner walls of the two clamp bodies 1 at the ends and the surface of the base rod are in a non-tensioned state, the staff can adjust the spacing between the lower ends of each clamp body 1 by adjusting the groups of upper connecting members 2 and lower connecting members 3, and adjust the tightness of the fasteners 4 to tighten the inner walls of the two clamp bodies 1 at the ends and the surface of the base rod, thereby making the inner walls of each clamp body 1 distributed in an annular shape and with the same inclination all tensioned with the surface of the base rod, ensuring that each clamp body 1 can evenly provide equal extrusion pressure to the surface of the base rod, thereby improving the fixing effect on the base rod and preventing the clamp from loosening or falling off.

[0045] When the present invention is in use, the number of the hoop bodies 1 is appropriately increased or decreased according to the caliber size of the part to be fixed on the base rod, the hoop is wrapped around the surface of the base rod, and the two hoop bodies 1 at the end are connected and preliminarily tightened by the fastener 4. The tension detection mechanism 5 is used to judge in real time whether the inner walls of the two hoop bodies 1 at the end are tightened with the surface of the base rod. If not, the upper connecting members 2 and the lower connecting members 3 of each group are adjusted to make the spacing between the lower ends of each hoop body 1 consistent and adjusted to a suitable distance to adjust the inclination of each hoop body 1, and then the fastener 4 is further adjusted to tighten the two hoop bodies 1 at the end. The adjustment is repeated many times until the tension detection mechanism 5 detects that the inner walls of the two hoop bodies 1 at the end are tightened with the surface of the base rod. At this time, the inner walls of each hoop body 1 are tightened with the surface of the base rod to achieve fixation of the base rod.

[0046] See also Figure 2 Furthermore, the clamp body 1 includes a clamp single plate 11 and a clamp fastening plate 12, and the clamp single plate 11 and the clamp fastening plate 12 are both arc-shaped with the same size. Spherical grooves are respectively provided on both sides of the clamp single plate 11 and the upper and lower ends of one side of the clamp fastening plate 12. The upper connecting member 2 includes a first connecting seat 21 and a first steering ball 22. The first connecting seat 21 is connected to the first steering ball 22 through a first connecting column, and the first steering ball 22 is respectively rotatably assembled in the spherical groove located at the upper end. The two adjacent first connecting seats 21 rotate and cooperate, so that each first connecting seat 21 can be respectively rotated on the corresponding clamp single plate 11 or the upper end of the clamp fastening plate 12 through the corresponding first steering ball 22, and then the two adjacent clamp bodies 1 can be respectively rotated relative to each other, so as to realize the adjustment of the inclination of each clamp single plate 11 and the clamp fastening plate 12 distributed in an annular shape, so that the composed annular clamp can fix base rods of different models.

[0047] See also Figure 2 , Figure 3The second connecting member 31 is connected to the second steering ball 32 through the second connecting column, and the second steering ball 32 is rotatably assembled in the spherical groove at the lower end. One end of the movable arm 33 is rotatably assembled on the second connecting seat 31, and the other ends of the two adjacent movable arms 33 are rotatably matched together, so that each second connecting seat 31 and the movable arm 33 can be respectively rotated at the lower end of the corresponding clamping hoop single plate 11 or the clamping hoop fastening plate 12 through the corresponding second steering ball 32 to cooperate with the adjustment of the inclination of each clamping hoop single plate 11 and the clamping hoop fastening plate 12. The spacing between the two adjacent second connecting seats 31 can be changed by rotating the two rotatably assembled movable arms 33, and the angle between the two adjacent movable arms 33 in each group remains consistent when the clamp is in use. The larger the angle between the two adjacent movable arms 33, the larger the spacing between the corresponding two adjacent second connecting seats 31, and vice versa.

[0048] See also Figure 2 , Figure 3 Further, the lower connecting member 3 also includes a positioning member 34, the positioning member 34 includes a fixed connecting rod 341, a third connecting seat 342, and a positioning screw 343, and the lower end and the upper end of the fixed connecting rod 341 are fixedly connected to the third connecting seat 342 and the positioning screw 343 respectively;

[0049] The two adjacent movable arms 33 are rotatably assembled on the third connecting seat 342, and the first connecting seat 21 is provided with a first circular hole on the surface. The two adjacent first connecting seats 21 are rotatably assembled on the positioning screw 343 through the first circular hole and are positioned by the first nut. Therefore, by pulling the positioning screw 343 to adjust the height of the positioning screw 343 extending out of the corresponding first circular hole and using the first nut to position on the upper and lower sides of the two adjacent first connecting seats 21 respectively, the angle between the two adjacent movable arms 33 can be adjusted, and the spacing between the two adjacent second connecting seats 31 can be adjusted and fixed, thereby realizing the adjustment and fixation of the inclination of each ring-shaped clamp body 1, so that the composed annular clamp can stably fix base rods of different models.

[0050] See also Figure 2 , Figure 3 Furthermore, long grooves are provided on the surfaces of the positioning screws 343, and scale lines for indicating the height of the first nut are provided on the inner wall surfaces of the long grooves, so that the height of the positioning screws 343 extending out of the corresponding first circular holes can be indicated by the scale line values ​​corresponding to the corresponding first nut. When the heights of the positioning screws 343 extending out of the corresponding first circular holes are consistent, the inclinations of the ring-shaped clamp bodies 1 can be ensured to be consistent.

[0051] Specifically, the adjustable range of the angle between two adjacent movable arms 33 in each group is preferably 10°-180°; when the angle between two adjacent movable arms 33 in each group is 60°, the upper and lower ends of each ring-shaped clamp body 1 are equal, that is, each clamp body 1 is vertical, and the formed ring-shaped clamp is used to fix the columnar base rod; when the angle between two adjacent movable arms 33 in each group is less than 60° and greater than or equal to 10°, the upper end spacing of each ring-shaped clamp body 1 is greater than the lower end spacing, that is, each clamp body 1 is inclined from the lower end to the inside, and the formed ring-shaped clamp is used to fix the inverted cone base rod; when the angle between two adjacent movable arms 33 in each group is greater than 60° and less than or equal to 180°, the upper end spacing of each ring-shaped clamp body 1 is less than the lower end spacing, that is, each clamp body 1 is inclined from the upper end to the inside, and the formed ring-shaped clamp is used to fix the conical base rod.

[0052] See also Figure 4 , Figure 5 Furthermore, the outer wall surface of the clamp fastening plate 12 is respectively provided with a limit bracket 121, and the surface of the limit bracket 121 is provided with a second circular hole;

[0053] The fastener 4 includes a fastening screw 41, a third steering ball 42, and a mounting seat 43. The fastening screw 41 is rotatably assembled on the limiting bracket 121 through the second circular hole and positioned by the second nut. The third steering ball 42 and the mounting seat 43 are respectively arranged at one end of the two fastening screws 41 close to each other. The third steering ball 42 is rotatably assembled on the mounting seat 43, so that the two fastening screws 41 can rotate relative to each other through the cooperation of the third steering ball 42 and the mounting seat 43 to cooperate with the different inclination states of the two clamp fastening plates 12. By pulling the fastening screw 41 and positioning it with the second nut on both sides of the limiting bracket 121, the spacing between the two clamp fastening plates 12 can be adjusted, thereby realizing the adjustment and fixation of the fastening degree of the annular clamp, so that the various clamp bodies 1 distributed in an annular shape form an annular clamp with good stability, thereby ensuring the fixing effect on the base rod.

[0054] When the present invention is in use, the number of the clamp bodies 1 is appropriately increased or decreased according to the caliber size of the part to be fixed on the base rod, the annular clamp is wrapped around the surface of the base rod, the fastening screw 41 is appropriately pulled and the second nuts are respectively used to position on both sides of the limiting bracket 121, so that the spacing between the two clamp fastening plates 12 is initially fixed, and the positioning screw 343 is pulled to adjust the height of the positioning screw 343 extending out of the corresponding first circular hole to adjust the angle between the two adjacent movable arms 33, thereby realizing the adjustment of the inclination of each clamp single plate 11 and the clamp fastening plate 12 distributed in an annular shape, and the two adjacent first connecting seats 21 are connected. The upper and lower sides are positioned respectively with the first nuts so that the scale line values ​​corresponding to the first nuts are consistent, ensuring that the inclinations of the ring-shaped clamp single plates 11 and clamp fastening plates 12 are consistent, and the tightening screw 41 is pulled again and the positioning position of the second nut is adjusted to tighten the two clamp fastening plates 12; during the adjustment process, the tension detection mechanism 5 is used to judge in real time the tension of the inner walls of the two clamp bodies 1 at the ends and the surface of the base rod until the inner sides of the clamp single plates 11 and the clamp fastening plates 12 are tightened with the surface of the base rod, completing the adjustment of the annular clamp and realizing the fixation of base rods of different models.

[0055] See also Figure 6 , Figure 7 , further, the tension detection mechanism 5 includes a tensioning member 51, a telescopic connecting rod 52, and a fifth connecting seat 53. The upper and lower ends of the clamp fastening plate 12 are respectively provided with tensioning members 51. The detection end and the driving end of the tensioning member 51 are respectively slidably assembled on the inner and outer sides of the clamp fastening plate 12. The driving ends of the tensioning member 51 are respectively rotatably assembled with the fifth connecting seat 53. The two fifth connecting seats 53 are connected by the telescopic connecting rod 52, so that the detection end of the tensioning member 51 can respectively sense the extrusion force from the inside to the outside on the upper and lower ends of the clamp fastening plate 12, and the extrusion force can respectively drive the driving ends of the tensioning member 51 at both ends to move; when the displacement amounts at both ends are the same, the two fifth connecting seats 53 move synchronously, so that the telescopic connecting rod 52 maintains the original length and moves, and finally maintains a state parallel to the surface of the clamp fastening plate 12; when the displacement amounts at both ends are different, the displacement amounts of the two fifth connecting seats 53 are also different, so that the telescopic connecting rod 52 automatically extends and moves, and finally maintains a state inclined with the surface of the clamp fastening plate 12;

[0056] A limiting arc groove 1211 is provided on one side of the limiting bracket 121 close to the outer wall of the clamp fastening plate 12. The tightness of the corresponding clamp fastening plate 12 and the base rod surface can be determined by the fitting state between the telescopic connecting rod 52 and the inner wall of the limiting arc groove 1211.

[0057] Specifically, when the outer rod surface of the telescopic connecting rod 52 is in contact with the inner wall surface of the limiting arc groove 1211, it means that the upper and lower ends of the inner side of the clamp fastening plate 12 wrapped around the surface of the base rod are tightened to the surface of the base rod, and then the inner side surfaces of the clamp single plates 11 and the clamp fastening plates 12 with the same inclination that constitute the annular clamp are in contact with the surface of the base rod from top to bottom.

[0058] See also Figure 6-9 Furthermore, cavities are respectively formed at the upper and lower ends of the clamp fastening plate 12, and inner openings and outer openings are respectively formed on both sides of the cavity;

[0059] The tensioning member 51 includes a detection plate 511, a driving plate 512, a connecting plate 513, a tensioning spring 514, and a fourth connecting seat 515. The detection plate 511 and the driving plate 512 are slidably assembled at the inner opening and the outer opening respectively. The fourth connecting seat 515 is arranged at the end of the driving plate 512 and rotatably cooperates with the fifth connecting seat 53 respectively. Connecting plates 513 are respectively arranged on both sides of the detection plate 511. The two ends of the tensioning spring 514 are respectively connected to the inner wall surface of the cavity and the surface of the connecting plate 513. When the detection plate 511 is retracted from the inner opening into the cavity under force, the driving plate 512 is driven to extend outward from the outer opening, and the driving plate 512 drives the corresponding fifth connecting seat 53 to move. Then, the staff can judge whether the corresponding clamp fastening plate 12 and the base rod surface are tightened according to whether the outer rod surface of the telescopic connecting rod 52 is in contact with the inner wall surface of the limiting arc groove 1211.

[0060] See also Figure 6-9 Furthermore, the surface of one side of the detection plate 511 away from the driving plate 512 is arc-shaped. When the tension spring 514 is in a naturally extended state, the arc-shaped end of the corresponding detection plate 511 protrudes from the inner opening. When the arc-shaped ends of the two detection plates 511 are tangent to the arc surfaces of the corresponding inner openings, the outer rod surface of the telescopic connecting rod 52 fits with the inner wall of the limiting arc groove 1211. When the annular clamp is used to fix the base rod surface, as the inner surface of the clamp fastening plate 12 gradually approaches the base rod surface, the detection plate 511 is forced to retract into the cavity from the inner opening, so that the tension spring is compressed and stored until the arc-shaped end of the detection plate 511 is tangent to the corresponding inner opening. The arc surfaces are tangent to each other, so that the inner surface of the clamp fastening plate 12 and the surface of the base rod are tightened; when the contact between the inner surface of the clamp fastening plate 12 and the surface of the base rod is loose, causing a gap between the detection plate 511 and the surface of the base rod, the tension spring 514 automatically rebounds, which can drive the driving plate 512 to retract toward the direction of the cavity, thereby changing the degree of fit between the outer rod surface of the telescopic connecting rod 52 and the inner wall surface of the limiting arc groove 1211, so that the staff can find and adjust the annular clamp in time, restore the tension between the inner side of the clamp and the surface of the base rod, avoid the annular clamp from falling off, and effectively ensure the fixing effect of the base rod during the installation and use of the annular clamp.

[0061] When the present invention is in use, each clamp single plate 11 and the clamp fastening plate 12 surround the surface of the base rod. During the annular clamp adjustment process, as the inner surface of the clamp fastening plate 12 gradually approaches the surface of the base rod, the detection plate 511 is forced to retract from the inner opening into the cavity, driving the driving plate 512 to extend outward from the outer opening, and the driving plate 512 drives the corresponding fifth connecting seat 53 to move, thereby driving the telescopic connecting rod 52 to move. If the telescopic connecting rod 52 moves until its outer rod surface is in contact with the inner wall surface of the limiting arc groove 1211, it means that the upper and lower ends of the inner side of the clamp fastening plate 12 are both The inner sides of the clamping plate 11 and the clamping fastening plate 12 which are tightened with the base rod surface, and then the inner sides of the clamping plate 11 and the clamping fastening plate 12 which have the same inclination as the annular clamping plate are in contact with the base rod surface from top to bottom, thereby ensuring the fixing effect on the base rod; if the telescopic connecting rod 52 moves to the point where the outer rod surface is not in contact with the inner wall surface of the limiting arc groove 1211, it means that the inner side of the clamping fastening plate 12 is not tightened with the base rod surface, and it is necessary to continue to adjust the positions of the first nuts and the second nuts to adjust the inclination of each clamping plate 11 and the clamping fastening plate 12 and the degree of tightening between the two clamping fastening plates 12;

[0062] Furthermore, the inner sides of the clamp single plate 11 and the clamp fastening plate 12 are respectively and evenly provided with anti-slip grooves.

[0063] When the present invention is in use, anti-skid grooves are provided on the inner sides of the hoop single plate 11 and the hoop fastening plate 12 which are in direct contact with the base rod surface, so as to enhance the friction force at the contact points between the hoop single plate 11, the hoop fastening plate 12 and the base rod and prevent the annular hoop from slipping.

[0064] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An annular fixed clamp with convenient inner diameter adjustment, comprising a clamp body, an upper connecting piece, a lower connecting piece, and a fastener, characterized in that: The upper connecting member and the lower connecting member are used to connect two adjacent clamp bodies, so that the two adjacent clamp bodies can rotate relatively, the upper end spacing is constant, and the lower end spacing is adjustable, and the lower end spacing of each clamp body is kept consistent so that the inclination of each clamp body distributed in a ring is consistent; The fastener is used to connect the two clamp bodies at the ends, so that the clamp bodies are combined into a chain-type ring clamp with adjustable taper and inner diameter; The two clamp bodies at the end are respectively provided with tension detection mechanisms for detecting the tension of the inner wall of the corresponding clamp body and the surface of the base rod. When the inner walls of the two clamp bodies at the end are tightened with the surface of the base rod, the inner walls of the clamp bodies that are distributed in an annular shape and have the same inclination are tightened with the surface of the base rod. The clamp body comprises a clamp single plate and a clamp fastening plate, the clamp single plate and the clamp fastening plate are both arc-shaped with the same size, and spherical grooves are respectively provided on both sides of the clamp single plate and the upper and lower ends of one side of the clamp fastening plate; The upper connecting member comprises a first connecting seat and a first steering ball, wherein the first connecting seat is connected to the first steering ball through a first connecting column, the first steering ball is rotatably assembled in the spherical groove located at the upper end, and two adjacent first connecting seats are rotatably matched; The lower connecting member includes a second connecting seat, a second steering ball, a movable arm and a positioning member, the second connecting seat is connected to the second steering ball through a second connecting column, the second steering ball is rotatably assembled in the spherical groove located at the lower end, one end of the movable arm is rotatably assembled on the second connecting seat, and the other ends of two adjacent movable arms are rotatably matched together; The positioning member comprises a fixed connecting rod, a third connecting seat, and a positioning screw, wherein the lower end and the upper end of the fixed connecting rod are respectively fixedly connected to the third connecting seat and the positioning screw; the two adjacent movable arms are rotatably assembled on the third connecting seat, the surface of the first connecting seat is provided with a first circular hole, and the two adjacent first connecting seats are rotatably assembled on the positioning screw through the first circular hole and positioned by a first nut; the surface of the positioning screw is provided with a long groove, and the inner wall surface of the long groove is provided with a scale line for indicating the height of the first nut; The outer wall surfaces of the clamp fastening plates are respectively provided with limit brackets, and the surfaces of the limit brackets are provided with second circular holes; The fastener includes a fastening screw, a third steering ball, and a mounting seat. The fastening screw is rotatably assembled on the limit bracket through the second circular hole and positioned by the second nut. The third steering ball and the mounting seat are respectively arranged at one end of the two fastening screws close to each other, and the third steering ball is rotatably assembled on the mounting seat.

2. The annular fixing clamp with convenient inner diameter adjustment according to claim 1, characterized in that: The tension detection mechanism comprises a tensioning member, a telescopic connecting rod, and a fifth connecting seat. The tensioning members are respectively provided at the upper and lower ends of the clamp fastening plate. The detection end and the driving end of the tensioning member are respectively slidably mounted on the inner side and the outer side of the clamp fastening plate. The driving end of the tensioning member is respectively rotatably mounted with the fifth connecting seat. The two fifth connecting seats are connected by the telescopic connecting rod. The limiting bracket is provided with a limiting arc groove on one side close to the outer wall of the clamp fastening plate, and the tension condition of the corresponding clamp fastening plate and the base rod surface can be judged by the fitting state of the telescopic connecting rod and the inner wall of the limiting arc groove.

3. The annular fixing clamp with convenient inner diameter adjustment according to claim 2 is characterized in that: The upper and lower ends of the clamp fastening plate are respectively provided with cavities, and the two sides of the cavity are respectively provided with an inner opening and an outer opening; The tensioning member includes a detection plate, a driving plate, a connecting plate, a tensioning spring, and a fourth connecting seat. The detection plate and the driving plate are respectively slidably assembled at the inner opening and the outer opening. The fourth connecting seat is arranged at the end of the driving plate and is respectively rotatably matched with the fifth connecting seat. Connecting plates are respectively arranged on both sides of the detection plate. The two ends of the tensioning spring are respectively connected to the inner wall surface of the cavity and the surface of the connecting plate.

4. The annular fixing clamp with convenient inner diameter adjustment according to claim 3 is characterized in that: The surface of one side of the detection plate away from the driving plate is arc-shaped. When the tension spring is in a naturally extended state, the corresponding arc-shaped end of the detection plate protrudes from the inner opening. When the arc-shaped ends of the two detection plates are respectively tangent to the arc surfaces where the corresponding inner openings are located, the outer rod surface of the telescopic connecting rod fits against the inner wall of the limiting arc groove.

5. The annular fixing clamp with convenient inner diameter adjustment according to claim 1, characterized in that: The inner sides of the clamp single plate and the clamp fastening plate are respectively and evenly provided with anti-slip grooves.

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