Flange bolt
By introducing an adjustment module and a return spring into the flange bolts, the loosening problem caused by bolt hole wear is solved, achieving an anti-loosening effect under wear conditions and reducing maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG FUZHIDA INTELLIGENT TECHNOLOGY CO LTD
- Filing Date
- 2025-06-30
- Publication Date
- 2026-05-15
AI Technical Summary
Existing flange bolts are prone to loosening after the bolt holes wear, leading to connection failure. Traditional anti-loosening measures are ineffective under wear conditions and have high maintenance costs.
A flange bolt structure including an adjustment module and a return spring was designed. The adjustment module drives the left and right adjustment blocks to slide, and the return spring compensates for the wear of the bolt holes to achieve the anti-loosening effect.
It effectively compensates for bolt hole wear, prevents flange bolts from loosening, reduces maintenance costs, and improves connection stability and safety.
Smart Images
Figure CN224245222U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a flange bolt. Background Technology
[0002] Flange bolts are bolt assemblies specifically used to fasten flange connections (i.e., two flanges). By passing the bolts through the bolt holes on the flanges and tightening them with nuts, a sealed connection or mechanical fixation between the flanges is achieved.
[0003] In actual working conditions, bolts often loosen due to factors such as vibration, alternating loads, and wear, leading to connection failure and even safety accidents. At present, although technologies such as friction anti-loosening and mechanical anti-loosening are widely used, they still have obvious defects in working conditions where bolt holes are prone to wear (such as vibrating equipment and high-load connectors). For example, traditional spring washer anti-loosening relies on friction. When the bolt hole develops wear gaps due to long-term use, the friction force decays rapidly, causing the bolt to loosen. Mechanical anti-loosening structures (such as stop plates) cannot compensate for wear gaps in real time and require regular inspection and replacement, resulting in high maintenance costs.
[0004] Therefore, how to effectively compensate for wear in the bolt holes to prevent loosening of flange bolts has become a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention
[0005] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a method that prevents loosening by adjusting the left and right adjusting plates when the screw hole is worn, thereby causing the left and right adjusting blocks to move outward.
[0006] To achieve the above objectives, this utility model provides the following technical solution: It includes a head and a rod, the rod being located below the head and extending axially up and down. It also includes an adjustment module located between the head and the rod. The rod has a left adjustment block and a right adjustment block respectively on its left and right sides, and corresponding to the left and right adjustment blocks are left and right sliding grooves for sliding. The adjustment module includes a left adjustment plate abutting against the left adjustment block, a right adjustment plate abutting against the right adjustment block, and an adjustment rod for driving the left and right adjustment plates away from each other. The left sliding groove is open on the left side, and the right sliding groove is open on the right side.
[0007] The present invention is further configured to include an upper reset spring and a lower reset spring. The rod is provided with fixing plates at both the upper and lower ends of the left sliding groove. The left and right sides of the upper reset spring are respectively fixedly connected to the top of the left adjusting plug and the fixing plate above it. The left and right sides of the lower reset spring are respectively fixedly connected to the top of the right adjusting plug and the fixing plate below it.
[0008] The present invention is further configured such that: the adjusting rod is rotatably mounted on the head and includes a left threaded section and a right threaded section, the left threaded section is threadedly engaged with the left adjusting plate and the right threaded section is threadedly engaged with the right adjusting plate, and the adjusting rod includes a turntable that abuts against the head.
[0009] The present invention is further configured such that: the left adjustment plate is arranged in a figure-7 shape and includes a top sliding plate; the head is provided with a mating groove for the sliding plate to slide; a limiting post is provided protruding from the head within the mating groove; the limiting post is inserted into the sliding plate and the sliding plate is provided with an elongated hole.
[0010] The present invention is further configured to include a cover made of rubber material, the cover being fitted over the head and having a limiting groove corresponding to the turntable, the cover being detachably connected to the head.
[0011] The present invention is further configured such that: the head is provided with a plurality of positioning blocks protruding in the circumferential direction, and the cover is provided with positioning slots corresponding to each positioning block.
[0012] The present invention is further configured such that each positioning block is arranged in a trapezoidal shape with the area of the inner end face being larger than the area of the outer end face.
[0013] By adopting the above technical solution, since the left and right adjustment blocks are slidably installed in the left and right sliding grooves of the rod, respectively, by applying force to the adjustment module, the left and right adjustment plates can be driven away from each other, and the force is applied to the left and right adjustment blocks respectively, causing them to extend outward and thus compensating for the worn bolt holes, thereby preventing the flange bolts from loosening. Attached Figure Description
[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0015] Figure 1 This is a perspective view of a specific embodiment of the present utility model;
[0016] Figure 2 This is a cross-sectional view of the present invention;
[0017] Figure 3 This is an exploded view of the present invention;
[0018] Figure 4 for Figure 2 Enlarged view of A in the middle;
[0019] Figure 5 for Figure 2 Enlarged view of B in the middle;
[0020] Figure 6 for Figure 2 Enlarged view of C in the middle;
[0021] Figure 7 for Figure 3 A magnified view of D.
[0022] In the diagram: 1-Head, 11-Matching groove, 12-Limiting post, 13-Positioning block;
[0023] 2-Right rod, 21-Left adjusting block, 22-Right adjusting block, 23-Left sliding groove, 24-Right sliding groove, 25-Fixing plate;
[0024] 3-Adjustment module, 31-Left adjustment plate, 311-Slide plate, 3111-Elongated hole, 32-Right adjustment plate, 33-Adjustment rod, 331-Left threaded section, 332-Right threaded section, 333-Turntable;
[0025] 4-Upper return spring;
[0026] 5- Lower return spring;
[0027] 6-Cover, 61-Limiting groove, 62-Positioning slot;
[0028] 7-Washer. Detailed Implementation
[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0030] like Figures 1-7As shown, this utility model discloses a flange bolt, including a head 1, a shank 2, and a washer 7 located between the head 1 and the shank 2. The shank 2 is located below the head 1 and extends axially up and down. The flange bolt is installed by inserting the shank 2 into a hole on the flange (not shown in the figure) and then rotating it with the corresponding nut. However, during the use of the flange bolt, wear of the bolt hole may occur, leading to loosening of the flange bolt. The model also includes an adjustment module 3 located between the head 1 and the shank 2. The shank 2 has a left adjustment block 21 and a right adjustment block 22 on its left and right sides, respectively, and corresponding to the left and right adjustment blocks 21 and 22, there are left sliding grooves 23 and right sliding grooves 24 for sliding. Section module 3 includes a left adjusting plate 31 that abuts against the left adjusting plug 21, a right adjusting plate 32 that abuts against the right adjusting plug 22, and an adjusting rod 33 for driving the left adjusting plate 31 and the right adjusting plate 32 away from each other. The left sliding groove 23 is open on the left side and the right sliding groove 24 is open on the right side. Since the left adjusting plug 21 and the right adjusting plug 22 are respectively slidably installed in the left sliding groove 23 and the right sliding groove 24 of the rod 2, by applying force to the adjusting module 3, the left and right adjusting plates 32 can be driven away from each other, and forces are applied to the left adjusting plug 21 and the right adjusting plug 22 respectively, causing them to extend outwards, thereby compensating for the worn screw holes on the nut and thus preventing the flange bolts from loosening.
[0031] It is also worth noting that this embodiment and the accompanying drawings are only illustrative examples. The left sliding groove 23, the right sliding groove 24, and the left adjusting block 21 and the right adjusting block 22 can be set at different positions of the rod 2. At the same time, the height of the left and right adjusting plates 32 that abut against them will also change accordingly, thereby achieving wear compensation for different positions of the screw hole. Furthermore, the number of left and right adjusting blocks 22 can be multiple and is not limited to one in this embodiment.
[0032] When the screw hole is worn but no force is applied to the adjustment module 3, it also includes an upper return spring 4 and a lower return spring 5. The rod 2 is provided with fixing plates 25 at both the upper and lower ends of the left sliding groove 23. The left and right sides of the upper return spring 4 are fixedly connected to the top of the left adjustment plug 21 and the upper fixing plate 25 by welding or other means. The left and right sides of the lower return spring 5 are fixedly connected to the top of the right adjustment plug 22 and the lower fixing plate 25. At this time, the force of each return spring can drive the left adjustment plug 21 and the right adjustment plug 22 to be exposed in the left sliding groove 23 and the right sliding groove 24, thereby achieving compensation for the screw hole within a certain range. When the upper and lower return springs cannot actively deform to drive the left and right adjustment plugs 22 to move, that is, when the upper and lower return springs are in the normal return state, the force is applied to the adjustment module 3 to further expose the left and right adjustment plugs 22, so that the screw hole, which is more severely worn at this time, can be compensated by the resistance of the left and right adjustment plugs 22.
[0033] The adjusting rod 33 is rotatably mounted on the head 1 and includes a left threaded section 331 and a right threaded section 332. The left threaded section 331 is threadedly engaged with the left adjusting plate 31, and the right threaded section 332 is threadedly engaged with the right adjusting plate 32. The adjusting rod 33 includes a turntable 333 that abuts against the head 1. The threads of the left threaded section 331 and the right threaded section 332 have opposite directions. Therefore, by applying force to the turntable 333 located on the head 1, the adjusting rod 33 rotatably mounted on the head 1 can be rotated, thereby causing the left and right threaded sections 332 to move in the opposite direction to the left and right adjusting plates 32, thus applying an outward force to the left and right adjusting blocks 22.
[0034] Preferably, the left adjusting plate 31 is arranged in a figure-7 shape and includes a top sliding plate 311. The head 1 is provided with a mating groove 11 for the sliding plate 311 to slide. The head 1 is provided with a limiting post 12 protruding from the mating groove 11. The limiting post 12 is inserted into the sliding plate 311, and the sliding plate 311 is provided with an elongated hole 3111. Since the head 1 is also equipped with the limiting post 12, and the sliding plate 311 is provided with an elongated hole 3111 corresponding to the limiting post 12, when the adjusting module 3 is applied to drive the left and right adjusting plates 32 to move in opposite directions, the limiting post 12 can always be located in the elongated hole 3111. Thus, the left adjusting plate 31 is restricted by the limiting post 12 and can only move along the length direction of the elongated hole 3111, thereby restricting the movement path and making the left and right adjusting plates 32 move more stably during the adjustment process.
[0035] In addition, a cover 6 made of rubber is included. The cover 6 is fitted onto the head 1 and a limiting groove 61 is provided on the turntable 333. The cover 6 is detachably connected to the head 1. When the cover 6 is fitted onto the head 1, the turntable 333 will be located in the limiting groove 61. Therefore, due to the action of the turntable 333, the cover 6 will not rotate relative to the head 1 during the rotation of the flange bolts. Furthermore, since the turntable 333 is blocked by the cover 6, unauthorized personnel cannot access the cover 6 and thus cannot rotate the adjusting rod 33.
[0036] The head 1 is provided with a plurality of positioning blocks 13 protruding in the circumferential direction. The cover 6 is provided with a positioning slot 62 corresponding to each positioning block 13. When the cover 6, made of rubber material, is inserted into the circumferential direction of the head 1, the positioning blocks 13 can be moved into the corresponding positioning slots 62 by bending the cover 6, so that the cover 6 will not fall off the head 1 due to the restriction of each positioning block 13.
[0037] Preferably, each positioning plug 13 is arranged in a trapezoidal shape with the area of the inner end face being larger than the area of the outer end face. Since the area of the outer end face of each positioning plug 13 is smaller than that of the inner end face, each positioning plug 13 can be stably fixed on the head 1. Since the outer side of each positioning plug 13 will first align with the corresponding positioning slot 62, the outer end face with an area smaller than the inner end face can more smoothly achieve alignment with the corresponding positioning slot 62, thereby realizing the connection between the cover 6 and the head 1.
[0038] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A flange bolt, comprising a head and a shank, wherein the shank is located below the head and extends axially vertically, characterized in that: It also includes an adjustment module located between the head and the rod. The rod has a left adjustment block and a right adjustment block on its left and right sides, respectively, and a left sliding groove and a right sliding groove are provided for the left and right adjustment blocks to slide. The adjustment module includes a left adjustment plate that abuts against the left adjustment block, a right adjustment plate that abuts against the right adjustment block, and an adjustment rod for driving the left and right adjustment plates away from each other. The left sliding groove is open on the left side and the right sliding groove is open on the right side.
2. A flange bolt according to claim 1, characterized in that: It also includes an upper reset spring and a lower reset spring. The rod is provided with fixing plates at both the upper and lower ends of the left sliding groove. The left and right sides of the upper reset spring are fixedly connected to the top of the left adjusting plug and the fixing plate above it, respectively. The left and right sides of the lower reset spring are fixedly connected to the top of the right adjusting plug and the fixing plate below it, respectively.
3. A flange bolt according to claim 1 or 2, characterized in that: The adjusting rod is rotatably mounted on the head and includes a left threaded section and a right threaded section. The left threaded section is threadedly engaged with the left adjusting plate, and the right threaded section is threadedly engaged with the right adjusting plate. The adjusting rod includes a turntable that abuts against the head.
4. A flange bolt according to claim 3, characterized in that: The left adjustment plate is arranged in a figure-7 shape and includes a top sliding plate. The head is provided with a mating groove for the sliding plate to slide. A limiting post is provided protruding from the head within the mating groove. The limiting post is inserted into the sliding plate, and the sliding plate is provided with an elongated hole.
5. A flange bolt according to claim 4, characterized in that: It also includes a cover made of rubber material, which is fitted over the head and has a limit groove corresponding to the turntable, and the cover is detachably connected to the head.
6. A flange bolt according to claim 5, characterized in that: The head is provided with several positioning blocks protruding in the circumferential direction, and the cover is provided with positioning slots corresponding to each positioning block.
7. A flange bolt according to claim 6, characterized in that: Each positioning block is arranged in a trapezoidal shape with the area of the inner end face being larger than the area of the outer end face.