Length-adjustable flange bolt

Abstract

The utility model relates to a length-adjustable flange bolt which comprises a hexagonal head flange plate and a screw rod, the screw rod comprises a polished rod section and a threaded section, and the hexagonal head flange plate is arranged on the polished rod section in a penetrating mode. The outer wall of the polish rod section is provided with a first sliding groove extending in the axial direction of the polish rod section and a plurality of second sliding grooves which are located on one side of the first sliding groove, distributed in the axial direction of the polish rod section at intervals and extend in the circumferential direction of the polish rod section, the width of the second sliding grooves is consistent with that of the first sliding groove, and one ends of the second sliding grooves communicate with the first sliding groove. The hexagonal head flange plate is fixedly connected with a locking rod, the outer diameter of the locking rod is consistent with the width of the first sliding groove, the end of the locking rod penetrates into the first sliding groove, and the tail end of the second sliding groove extends upwards to form a locking groove matched with the locking rod. According to the flange bolt with the adjustable length, the effective length of the flange bolt can be conveniently adjusted, and meanwhile the flange bolt can be stably matched with a nut to conduct fastening connection on a flange.

Description

Technical Field

[0001] This utility model relates to the field of fastener technology, and in particular to an adjustable-length flange bolt. Background Technology

[0002] Flange bolts are bolts composed of a hexagonal head flange and a threaded rod. In order to meet the assembly requirements of flanges of different thicknesses, existing technologies have proposed flange bolts that can adjust the effective length of the threaded rod (i.e., the length between the lower end of the hexagonal head flange and the lower end of the threaded rod). For example, utility model patent: A flange bolt (publication number: CN219809258U) discloses a flange bolt that achieves effective length adjustment of the threaded rod through a length adjustment locking component and a length adjustment guide. In the above structure, the locking pin is pressed and held in the reserved holes at different positions in the length adjustment guide by the spring in the length adjustment component, so as to adjust the position of the bolt head (i.e., the hexagonal head flange) on the smooth rod, thereby adjusting the effective length of the threaded rod. However, in actual use, the locking pin may be dislodged from the reserved hole due to external force accidentally touching the lever plate or the spring force weakening, causing the bolt head to loosen on the smooth rod and affecting the fastening effect of the flange bolt on the flange.

[0003] To address the aforementioned problems, this utility model provides improvements. Utility Model Content

[0004] This invention proposes a flange bolt with adjustable length, which solves the above-mentioned problems existing in the use of the prior art.

[0005] The technical solution of this utility model is implemented as follows:

[0006] An adjustable-length flange bolt includes a hexagonal head flange and a threaded rod. The threaded rod includes a smooth section and a threaded section. The hexagonal head flange passes through the smooth section. The outer wall of the smooth section has a first sliding groove extending axially along the smooth section and several second sliding grooves located on one side of the first sliding groove, spaced apart axially along the smooth section and extending circumferentially along the smooth section. The width of the second sliding groove is the same as the width of the first sliding groove, and one end of the second sliding groove communicates with the first sliding groove. A locking rod with an outer diameter the same as the width of the first sliding groove and whose end passes into the first sliding groove is fixedly connected to the hexagonal head flange. The end of the second sliding groove extends upward to form a locking groove that matches the locking rod.

[0007] Preferably, the first sliding groove is arranged in a circular array along the axis of the smooth rod section, and the locking rod is arranged in a circular array along the axis of the hexagonal flange.

[0008] Preferably, a spring plunger is screwed to the end of the locking rod, and the positioning bead of the spring plunger abuts against the bottom wall of the first sliding groove.

[0009] Preferably, the bottom wall of the first sliding groove is provided with a plurality of first positioning holes, each located on one side of the opening of a plurality of second sliding grooves and matching the positioning beads of the spring plunger.

[0010] Preferably, a second positioning hole is provided on the bottom wall of the second sliding groove, located on one side of the locking groove opening and matching the positioning bead of the spring plunger.

[0011] Preferably, the hexagonal flange has several threaded holes, the locking rod is threaded into the threaded holes and has an internal hexagonal hole on its outer end face, and the bottom of the locking groove has a locking hole that matches the locking rod.

[0012] Preferably, the first sliding groove extends upward through the optical rod section, and a cover plate that shields the opening of the first sliding groove is screwed to the end of the optical rod section.

[0013] In summary, the beneficial effects of this utility model are as follows: by sliding the locking rod in the first and second sliding grooves, the position of the hexagonal head flange on the screw can be easily adjusted, thereby adjusting the effective length of the flange bolts to adapt to the fastening connection of flanges of different thicknesses. Furthermore, after tightening the nut that mates with the flange bolts, the relative displacement between the hexagonal head flange and the screw is locked by the cooperation of the locking rod and the locking groove, so that the flange thread is stably maintained at the adjusted effective length and will not loosen due to external forces, thus ensuring the stability of the flange connection when the flange bolts and nuts are fastened together. 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 schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a cross-sectional schematic diagram of the present invention;

[0017] Figure 3 This is an exploded view of the present invention.

[0018] In the diagram: 1. Hexagonal flange; 11. Locking rod; 12. Spring plunger; 13. Threaded hole; 2. Screw; 21. Plain section; 22. Threaded section; 23. First sliding groove; 24. Second sliding groove; 25. Locking groove; 26. First positioning hole; 27. Second positioning hole; 28. Locking hole; 29. ​​Cover plate. Detailed Implementation

[0019] The following will refer to the appendix in the embodiments of this utility model. Figure 1-3 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] As shown in the figure, an adjustable-length flange bolt includes a hexagonal head flange 1 and a screw 2. The screw 2 includes a smooth section 21 and a threaded section 22. The hexagonal head flange 1 passes through the smooth section 21. The outer wall of the smooth section 21 has a first sliding groove 23 extending axially along the smooth section 21 and several second sliding grooves 24 located on one side of the first sliding groove 23, spaced apart axially along the smooth section 21 and extending circumferentially along the smooth section 21. The width of the second sliding groove 24 is the same as the width of the first sliding groove 23, and one end of the second sliding groove 24 communicates with the first sliding groove 23. A locking rod 11 with an outer diameter the same as the width of the first sliding groove 23 and whose end passes into the first sliding groove 23 is fixedly connected to the hexagonal head flange 1. The end of the second sliding groove 24 extends upward to form a locking groove 25 that matches the locking rod 11.

[0021] In the above structure, when adjusting the position of the hexagonal flange 1 on the smooth rod section 21 to adjust the effective length of the screw 2, the hexagonal flange 1 is axially slid along the smooth rod section 21, causing the locking rod 11 to slide within the first sliding groove 23 to the desired position on one side of the second sliding groove 24. Then, the hexagonal flange 1 is rotated, causing the locking rod 11 to enter the second sliding groove 24 and slide until the end of the second sliding groove 24 aligns with the locking groove 25. When using this flange bolt and nut combination to fasten the flange, the screw 2 is passed through the bolt hole of the flange, causing the hexagonal flange 1 to abut against the flange. The upper end of the screw 2 is pressed down, causing the screw 2 to move relative to the hexagonal flange 1, allowing the locking rod 11 to slide into the locking groove 25. The locking groove 25 limits the rotation of the locking rod 11, thereby controlling the rotation of the hexagonal flange 1 relative to the screw. The rotation of bolt 2 applies a limit, allowing the nut to be screwed onto bolt 2 and tightening bolt 2 to keep locking rod 11 within locking groove 25, thus achieving the matching of flange bolt and nut. When it is necessary to readjust the effective length of flange bolt, the hexagonal flange 1 is moved to disengage locking rod 11 from locking groove 25 and slide it into second sliding groove 24, and then rotates along second sliding groove 24 into first sliding groove 23. Through the above structure and method, the effective length of flange bolt can be easily adjusted to adapt to the fastening connection of flanges of different thicknesses. After tightening the nut that mates with the flange bolt, the relative displacement between hexagonal flange 1 and bolt 2 is locked by the engagement of locking rod 11 and locking groove 25, so that the flange thread is stably kept at the adjusted effective length and will not loosen due to external forces, thereby ensuring the stability of flange bolt and nut fastening connection.

[0022] Furthermore, based on the above structure, the first sliding groove 23 is arranged in a circular array along the axis of the smooth rod section 21, and the locking rod 11 is arranged in a circular array along the axis of the hexagonal flange 1. By setting multiple locking rods 11, the stability and strength between the hexagonal flange 1 and the screw 2 are enhanced, thereby ensuring the stability of the flange bolt and nut when they are engaged.

[0023] Furthermore, based on the above structure, a spring plunger 12 is screwed to the end of the locking rod 11. The positioning bead of the spring plunger 12 abuts against the bottom wall of the first sliding groove 23. When the locking rod 11 slides in the first sliding groove 23 and the second sliding groove 24, the positioning bead of the spring plunger 12 always abuts against the bottom wall of the first sliding groove 23 and the second sliding groove 24. The abutment of the positioning bead of the spring plunger 12 applies a certain damping to the sliding of the locking rod 11, making it easier to slide the locking rod 11 to the position aligned with the opening of the second sliding groove 24. This facilitates the operation when adjusting the effective length of the flange bolts and improves the feel of operation.

[0024] Furthermore, based on the above structure, the bottom wall of the first sliding groove 23 is provided with a plurality of first positioning holes 26, each located on one side of the opening of a plurality of second sliding grooves 24 and matching the positioning beads of the spring plunger 12. When the spring plunger 12 slides with the locking rod 11 to a position aligned with the opening of the second sliding groove 24, its positioning beads are engaged in the first positioning holes 26 to apply segmental damping to the sliding of the locking rod 11 in the first sliding groove 23, making it easier to slide the locking rod 11 to a position aligned with the opening of the second sliding groove 24, thereby facilitating the operation when adjusting the effective length of the flange bolts and improving the feel of operation.

[0025] Furthermore, based on the above structure, a second positioning hole 27 is provided on the bottom wall of the second sliding groove 24, located on one side of the opening of the locking groove 25 and matching the positioning bead of the spring plunger 12. When the spring plunger 12 slides with the locking rod 11 to the position aligned with the opening of the locking groove 25, its positioning bead is engaged in the second positioning hole 27 to apply segment damping to the sliding of the locking rod 11 in the second sliding groove 24, making it easier to slide the locking rod 11 to the position aligned with the opening of the locking groove 25, thereby facilitating the operation when the flange screw 2 is engaged with the nut.

[0026] Furthermore, based on the above structure, the hexagonal flange 1 is provided with several threaded holes 13. The locking rod 11 is threaded into the threaded holes 13, and an internal hexagonal hole is provided on the outer end face of the locking rod 11. The bottom of the locking groove 25 is provided with a locking hole 28 that matches the locking rod 11. When the locking rod 11 slides into the locking groove 25, the locking rod 11 is aligned with the locking hole 28. The locking rod 11 is rotated through the internal hexagonal hole at the end of the locking rod 11, causing the locking rod 11 to move towards the screw 2 in the threaded holes 13, and the end of the locking rod 11 is inserted into the locking hole 28. The relative displacement between the hexagonal flange 1 and the screw 2 is locked by the cooperation of the locking rod 11 and the locking hole 28, ensuring that the hexagonal flange 1 is stably held on the screw 2. This facilitates the operation of the flange bolts and nuts, and also enhances the stability of the flange bolt 2 when it is fitted with the nut. When it is necessary to adjust the effective length of the flange bolts, simply rotate the locking rod 11 to make it retract from the locking hole 28.

[0027] Furthermore, based on the above structure, the first sliding groove 23 extends upward through the smooth rod section 21, and the end of the smooth rod section 21 is screwed with a cover plate 29 that covers the opening of the first sliding groove 23. The locking rod 11 can be removed from or slid into the first sliding groove 23 through the opening of the smooth rod section 21 of the first sliding groove 23, thereby facilitating the disassembly and assembly of the hexagonal flange 1 on the screw 2 and facilitating the operation during assembly.

[0028] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A length-adjustable flange bolt, comprising a hexagonal head flange (1) and a threaded rod (2), the threaded rod (2) comprising a smooth section (21) and a threaded section (22), the hexagonal head flange (1) being threaded onto the smooth section (21), characterized in that: The outer wall of the smooth rod section (21) is provided with a first sliding groove (23) extending along the axial direction of the smooth rod section (21) and a number of second sliding grooves (24) located on one side of the first sliding groove (23) and spaced along the axial direction of the smooth rod section (21) and extending circumferentially along the smooth rod section (21). The width of the second sliding groove (24) is the same as the width of the first sliding groove (23) and one end of the second sliding groove (24) is connected to the first sliding groove (23). A locking rod (11) with an outer diameter the same as the width of the first sliding groove (23) and an end inserted into the first sliding groove (23) is fixedly connected to the hexagonal flange (1). The end of the second sliding groove (24) extends upward to form a locking groove (25) that matches the locking rod (11).

2. The adjustable-length flange bolt according to claim 1, characterized in that: The first sliding groove (23) is arranged in a ring array along the axis of the smooth rod section (21), and the locking rod (11) is arranged in a ring array along the axis of the hexagonal flange (1).

3. The adjustable-length flange bolt according to claim 2, characterized in that: The locking rod (11) is screwed to a spring plunger (12) at its end, and the positioning ball of the spring plunger (12) abuts against the bottom wall of the first sliding groove (23).

4. The adjustable-length flange bolt according to claim 3, characterized in that: The bottom wall of the first sliding groove (23) is provided with a plurality of first positioning holes (26) that are located on one side of the opening of a plurality of second sliding grooves (24) and match the positioning beads of the spring plunger (12).

5. The adjustable-length flange bolt according to claim 4, characterized in that: The bottom wall of the second sliding groove (24) is provided with a second positioning hole (27) located on one side of the locking groove (25) and matching the positioning bead of the spring plunger (12).

6. The adjustable-length flange bolt according to claim 5, characterized in that: The hexagonal flange (1) has several screw holes (13), the locking rod (11) is screwed into the screw holes (13) and the outer end face of the locking rod (11) is provided with an internal hexagonal hole, and the bottom of the locking groove (25) is provided with a locking hole (28) that matches the locking rod (11).

7. The adjustable-length flange bolt according to claim 6, characterized in that: The first sliding groove (23) extends upward through the smooth rod section (21), and the end of the smooth rod section (21) is screwed with a cover plate (29) that covers the opening of the first sliding groove (23).

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