A concealed connecting structure of a wooden column and a retaining wall

Abstract

The utility model belongs to wood structure connecting piece technical field especially relates to a hidden wood column and the connecting structure of enclosure wall, including enclosure wall and wood column, the middle part of wood column is equipped with ladder hole, the inner end of ladder hole is equipped with connecting rod, and the connecting rod is through wood column and extends to the inside of enclosure wall. The outer end of connecting rod is slidably connected with split flexible expansion sleeve mechanism, split flexible expansion sleeve mechanism includes split sleeve and two symmetrical taper inner core connected through flexible hinge, still includes self -lock connecting mechanism and anchoring mechanism, when wood contracts, split sleeve each petal piece moves independently to the inside and produces radial pressure to taper inner core, taper face converts radial pressure into axial pressure, but greater axial reaction force is limited to be produced by lock nut and pre -press spring, and the connection is more and more fastened, the utility model discloses through force conversion and self -lock enhancement mechanism solves the problem that traditional connection is loose failure when wood deforms, and the connecting piece is completely hidden, and the appearance of wood column is further improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of wood structure connectors, and in particular relates to a hidden connection structure between a wooden column and a retaining wall. Background Technology

[0002] As the main load-bearing components of traditional timber-framed buildings, the quality of the connection between the timber columns and the enclosing walls directly affects the structural safety and service life of the building. In traditional timber-framed buildings, the connection between the timber columns and the enclosing walls is usually achieved through exposed connection methods such as nails or wires.

[0003] Wood, as a natural organic material, exhibits significant shrinkage and expansion characteristics, with radial and tangential deformation coefficients reaching 3% to 6%. When environmental humidity changes, wooden pillars will undergo corresponding expansion or contraction deformation. Existing technologies employ exposed connection methods such as nails or wire connections. When the wood shrinks, the contact area between the connector and the hole wall of the wooden pillar decreases, significantly reducing friction and leading to loosening and failure of the connection. Furthermore, this connection method affects the aesthetics of the wooden pillar. Utility Model Content

[0004] In view of the technical problems existing in the background art, this utility model provides a hidden connection structure between wooden columns and enclosure walls, which aims to solve the problem of loosening and failure of the connection when the wood expands and contracts. It provides a highly adaptive, reliable and aesthetically pleasing concealed connection solution for wooden structure buildings.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0006] A concealed wooden pillar and enclosure wall connection structure includes an enclosure wall and a wooden pillar. A stepped hole is provided in the middle of the wooden pillar, and a connecting rod is provided at the inner end of the stepped hole. The connecting rod passes through the wooden pillar and extends into the enclosure wall.

[0007] The outer end of the connecting rod is slidably connected to a segmented flexible expansion sleeve mechanism. The segmented flexible expansion sleeve mechanism includes several segmented outer sleeves that are slidably connected to the outer wall of the connecting rod. The segmented outer sleeves are connected by flexible hinges. The outer wall of the connecting rod is slidably connected to two symmetrically arranged conical inner cores. Both symmetrically arranged conical inner cores abut against the segmented outer sleeves. The outer end of the connecting rod is threadedly connected to an annular washer and a locking nut, and the locking nut abuts against the conical inner cores.

[0008] Optionally, it also includes a self-locking connection mechanism, which includes a pre-embedded anchor sleeve. The inner wall of the pre-embedded anchor sleeve is fixedly connected with a number of first stop strips, and the outer end of the connecting rod is fixedly connected with a number of second stop strips that match the first stop strips.

[0009] Optionally, the top of the pre-embedded anchor sleeve is provided with a countersunk hole, the bottom end of the countersunk hole is fixedly connected with several locking pins, the outer end of the connecting rod is fixedly connected with a wedge ring, the connecting rod is engaged with the wedge ring, the inner wall of the countersunk hole is slidably connected with a locking ring, and the outer end of the pre-embedded anchor sleeve is fixedly connected with an anchoring mechanism.

[0010] Optionally, the anchoring mechanism includes a small toothed ring and a large toothed ring fixedly connected to the pre-embedded anchoring sleeve, with the large toothed ring located below the small toothed ring and the tips of the teeth of the small toothed ring and the large toothed ring inclined inward. The outer end of the pre-embedded anchoring sleeve is fixedly connected with several anchoring wing pieces, which are evenly distributed along the circumference of the pre-embedded anchoring sleeve.

[0011] Optionally, the petals of the split outer jacket are formed by radial division, with the dividing seam cutting inward from the outer circle, and a flexible hinge set at the root of the inner diameter, with a thickness less than the thickness of the petal body.

[0012] Optionally, the outer surface of the conical inner core is conical, which mates with the inner hole of the segmented outer sleeve, and the locking nut adjusts the axial position of the conical inner core through a threaded connection.

[0013] Optionally, a preload spring is slidably connected to the outer end of the connecting rod. The end closer to the conical inner core abuts against the conical inner core, where the preload spring rests. The end further away from the conical inner core abuts against the locking ring.

[0014] This utility model has the following advantages and beneficial effects:

[0015] This utility model provides a concealed connection structure between a wooden post and a retaining wall. It utilizes a segmented flexible expansion sleeve mechanism on the outer wall of the connecting rod, comprising a segmented outer sleeve connected by flexible hinges and two symmetrically arranged conical inner cores. When the wood contracts, each segment of the outer sleeve independently bends inward, generating radial pressure on the conical inner cores. The conical surface converts this radial pressure into axial pressure, causing the conical inner cores to tend to move away from each other. However, due to the locking nut and preload spring, a greater axial reaction force is generated, making the connection increasingly secure. When the wood expands, the segments bend outward to release stress, preventing the wooden post from cracking. This force conversion and self-locking reinforcement mechanism solves the problem of loosening and failure in traditional connections when the wood deforms. Furthermore, this concealed connection method further enhances the aesthetics of the wooden post. Attached Figure Description

[0016] Figure 1 This is a schematic diagram showing the connection state of the hidden wooden column and the enclosure wall of this utility model;

[0017] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0018] Figure 3 This is a schematic diagram of the overall structure of the connection between the concealed wooden pillar and the enclosure wall of this utility model;

[0019] Figure 4 This is the first partial view of this utility model;

[0020] Figure 5 This is a structural diagram of the practical segmented flexible expansion sleeve mechanism;

[0021] Figure 6 This is a structural diagram of the practical anchoring mechanism.

[0022] Reference numerals: 1. Enclosure wall; 2. Wooden post; 3. Step hole; 4. Connecting rod; 5. Split-type outer sleeve; 6. Flexible hinge; 7. Conical inner core; 8. Annular washer; 9. Locking nut; 10. Embedded anchor sleeve; 11. First stop strip; 12. Second stop strip; 13. Countersunk hole; 14. Locking pin; 15. Wedge ring; 16. Locking ring; 17. Small toothed ring; 18. Large toothed ring; 19. Anchoring wing; 20. Preload spring. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0025] Example

[0026] like Figures 1-2 and Figures 4-5 As shown, this utility model provides a hidden wooden column and enclosure wall connection structure, including enclosure wall 1 and wooden column 2. A stepped hole 3 is opened in the middle of the wooden column 2. A connecting rod 4 is provided at the inner end of the stepped hole 3. The connecting rod 4 passes through the wooden column 2 and extends into the enclosure wall 1. A segmented flexible expansion sleeve mechanism is slidably connected to the outer end of the connecting rod 4. The segmented flexible expansion sleeve mechanism includes a plurality of segmented outer sleeves 5 slidably connected to the outer wall of the connecting rod 4. The plurality of segmented outer sleeves 5 are connected by flexible hinges 6.

[0027] In this embodiment, the connecting rod 4 is made of threaded steel, which has good mechanical properties and corrosion resistance.

[0028] The split outer jacket 5 adopts a four-lobed structure, which is formed by radial division into four lobes. The dividing seam cuts inward from the outer circle but does not completely cut through, keeping the central connecting part from being cut off.

[0029] The flexible hinge 6 is located at the root of the inner diameter and has good extensibility and elastic deformation ability. The flexible hinge 6 is made of spring steel 65Mn material and is integrally molded with the main body of the petal. It is heat-treated to obtain good elasticity and toughness. The extensibility design of the flexible hinge 6 enables it to adapt to the repeated expansion and contraction of the wooden column 2 while maintaining the integrity of the connection.

[0030] The outer wall of the connecting rod 4 has two symmetrically arranged conical inner cores 7 that slide together. The conical inner cores 7 are made of steel with heat treatment, which has good strength and wear resistance. Both conical inner cores 7 abut against the split outer sleeve 5, and the symmetrical design achieves a uniform force conversion effect.

[0031] The outer end of the connecting rod 4 is threaded with an annular washer 8 and a locking nut 9. The locking nut 9 adjusts the axial position of the tapered inner core 7 through the threaded connection, providing an adjustable preload.

[0032] It also includes a self-locking connection mechanism, which includes a pre-embedded anchor sleeve 10. The pre-embedded anchor sleeve 10 is made of steel plate and has good strength and weldability. Several first stop strips 11 are fixedly connected to the inner wall of the pre-embedded anchor sleeve 10. Several second stop strips 12 that match the first stop strips 11 are fixedly connected to the outer end of the connecting rod 4. Both the first stop strips 11 and the second stop strips 12 adopt a rectangular cross-section design, which can effectively prevent the connecting rod 4 from rotating when the locking nut 9 is tightened.

[0033] like Figure 4 As shown, the top of the pre-embedded anchor sleeve 10 is provided with a countersunk hole 13, and the bottom end of the countersunk hole 13 is fixedly connected with several locking pins 14. The locking pins 14 are made of spring steel and have good elasticity and locking performance. The outer end of the connecting rod 4 is fixedly connected with a wedge ring 15. The wedge ring 15 is made of hard alloy steel and has good wear resistance. The inner wall of the countersunk hole 13 is slidably connected with a locking ring 16. The locking ring 16 is made of sealing rubber material and has good sealing and durability.

[0034] like Figures 3-4 As shown, the outer end of the pre-embedded anchor sleeve 10 is fixedly connected to an anchoring mechanism. The anchoring mechanism includes a small toothed ring 17 and a large toothed ring 18 fixedly connected to the pre-embedded anchor sleeve 10. The large toothed ring 18 is located below the small toothed ring 17. The small toothed ring 17 and the large toothed ring 18 are made of high-strength steel and have an inwardly inclined tooth tip design, which can effectively enhance the pull-out resistance and anchoring effect.

[0035] like Figure 6As shown, the outer end of the pre-embedded anchor sleeve 10 is fixedly connected with several anchoring wing pieces 19. The anchoring wing pieces 19 are made of steel plates and are evenly distributed along the circumference of the pre-embedded anchor sleeve 10, which can form a good mechanical interlock with the concrete of the retaining wall 1.

[0036] A preload spring 20 is slidably connected to the outer end of the connecting rod 4. The preload spring 20 is made of spring steel and has excellent elastic properties and fatigue life. The end of the preload spring 20 close to the conical inner core 7 abuts against the conical inner core 7, and the end of the preload spring 20 away from the conical inner core 7 abuts against the locking ring 16, which can provide a continuous and stable preload force.

[0037] like Figures 1-2 and Figures 4-5 As shown, when the wooden column 2 shrinks due to the decrease in ambient humidity, the diameter of the stepped hole 3 inside the wooden column 2 decreases, which causes radial compression on the split outer sleeve 5. Since the split outer sleeve 5 is connected by a flexible hinge 6, each petal can move inward independently, and the inner diameter shrinks accordingly. The shrinking petals further clamp the two symmetrically arranged conical inner cores 7, and the radial pressure is converted into axial clamping force through the conical surface, realizing the adaptive effect of "the greater the shrinkage, the tighter the clamping", and maintaining the tightness of the connection between the enclosure wall 1 and the wooden column 2.

[0038] When the wood expands due to increased ambient humidity, the diameter of the stepped hole 3 in the wooden column 2 increases, the segmented outer sleeve 5 releases the radial force, the diameter of the segmented flexible expansion sleeve mechanism increases, and each segment moves outward through the flexible hinge 6. As a result, the axial clamping force decreases, but the conical inner core 7 and the segmented outer sleeve 5 still maintain effective contact. Under the elastic force of the preload spring 20, the axial clamping force is compensated, the basic connection force is maintained, and the connection is ensured not to fail due to expansion.

[0039] like Figures 1-6 As shown, during installation, when constructing the structural columns of the retaining wall 1, the pre-embedded anchor sleeve 10 is pre-embedded in the design position to ensure that the small toothed ring 17, the large toothed ring 18 and the anchor wing 19 are fully bonded to the concrete to form a reliable anchoring foundation.

[0040] Connecting rod 4 insertion connection: Insert connecting rod 4 into the pre-embedded anchor sleeve 10. The second stop strip 12 fixed on the outer wall of connecting rod 4 cooperates with the first stop strip 11 fixed inside the pre-embedded anchor sleeve 10 to prevent connecting rod 4 from rotating when tightening lock nut 9 later, thus ensuring the stability of the connection.

[0041] Wedge ring 15 locking: During the process of inserting the connecting rod 4 into the pre-embedded anchor sleeve 10, the wedge ring 15 at the outer end of the connecting rod 4 pushes the locking pin 14 on the countersunk hole 13 to expand radially. The locking pin 14 is made of spring steel and has good elasticity until the locking pin 14 jams the wedge ring 15, forming a reliable axial lock.

[0042] Components are installed sequentially: Locking ring 16 is fitted onto connecting rod 4, and pre-compression spring 20, first conical inner core 7, and segmented flexible expansion sleeve mechanism are fitted in sequence.

[0043] Installation of wooden post 2: Machining stepped holes 3 on wooden post 2, inserting wooden post 2 and fitting it onto the outer end of the split flexible expansion sleeve mechanism, ensuring that the split outer sleeve 5 is fully inserted into the shallow hole portion of the stepped hole;

[0044] Installation of the second conical inner core 7: Insert the second conical inner core 7 into the connecting rod 4 to form a symmetrical configuration with the first conical inner core 7;

[0045] Final tightening: Install the annular washer 8 and the locking nut 9 in sequence, and gradually tighten the locking nut 9 to firmly fix the wooden post 2 to the enclosure wall 1;

[0046] As the locking nut 9 is tightened, the preload spring 20 contracts and presses the locking ring 16, which in turn presses the locking pin 14 to prevent it from expanding and loosening. At the same time, the locking ring 16 acts as a seal to prevent moisture, dust, and other contaminants from entering the embedded anchor sleeve 10, thus avoiding corrosion of the metal parts and preventing connection failure.

[0047] The preload spring 20 plays a crucial dynamic adjustment role when the wooden column 2 expands or contracts. When the wood expands, the preload spring 20 automatically compensates for the axial clearance and maintains the tightness of the connection. When the wood contracts, the preload spring 20 is further compressed to absorb some of the stress and prevent the segmented flexible expansion sleeve mechanism from being subjected to excessive impact. This dynamic balance mechanism ensures the stability of the connection under various working conditions.

[0048] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A concealed wooden pillar and enclosure wall connection structure, comprising an enclosure wall (1) and wooden pillars (2), characterized in that: The wooden column (2) has a stepped hole (3) in the middle, and a connecting rod (4) is provided at the inner end of the stepped hole (3). The connecting rod (4) passes through the wooden column (2) and extends into the enclosure wall (1). The outer end of the connecting rod (4) is slidably connected to a segmented flexible expansion sleeve mechanism. The segmented flexible expansion sleeve mechanism includes several segmented outer sleeves (5) slidably connected to the outer wall of the connecting rod (4). The several segmented outer sleeves (5) are connected by a flexible hinge (6). The outer wall of the connecting rod (4) is slidably connected to two symmetrically arranged conical inner cores (7). The two symmetrically arranged conical inner cores (7) abut against the segmented outer sleeves (5). The outer end of the connecting rod (4) is threadedly connected to an annular washer (8) and a locking nut (9), and the locking nut (9) abuts against the conical inner core (7).

2. The connection structure between a concealed wooden pillar and an enclosure wall according to claim 1, characterized in that: It also includes a self-locking connection mechanism, which includes a pre-embedded anchor sleeve (10), the inner wall of which is fixedly connected with a number of first stop strips (11), and the outer end of the connecting rod (4) is fixedly connected with a number of second stop strips (12) that match the first stop strips (11).

3. The connection structure between a concealed wooden pillar and an enclosure wall according to claim 2, characterized in that: The top of the pre-embedded anchor sleeve (10) is provided with a countersunk hole (13), and a number of locking pins (14) are fixedly connected to the bottom end of the countersunk hole (13). A wedge ring (15) is fixedly connected to the outer end of the connecting rod (4). A locking ring (16) is slidably connected to the inner wall of the countersunk hole (13). An anchoring mechanism is fixedly connected to the outer end of the pre-embedded anchor sleeve (10).

4. The connection structure between a concealed wooden pillar and an enclosure wall according to claim 3, characterized in that: The anchoring mechanism includes a small toothed ring (17) and a large toothed ring (18) fixedly connected to the pre-embedded anchoring sleeve (10), and the large toothed ring (18) is located below the small toothed ring (17), and the tips of the teeth of the small toothed ring (17) and the large toothed ring (18) are inclined inward. The outer end of the pre-embedded anchoring sleeve (10) is fixedly connected to a number of anchoring wing pieces (19), and the number of anchoring wing pieces (19) are evenly distributed along the circumference of the pre-embedded anchoring sleeve (10).

5. The connection structure between a concealed wooden pillar and an enclosure wall according to claim 1, characterized in that: The petals of the split outer jacket (5) are formed by radial division, with the dividing seam cutting inward from the outer circle. The flexible hinge (6) is located at the root of the inner diameter and has a thickness less than that of the petal body.

6. The connection structure between a concealed wooden pillar and an enclosure wall according to claim 2, characterized in that: The outer surface of the conical inner core (7) is conical and fits with the inner hole of the split outer sleeve (5). The locking nut (9) adjusts the axial position of the conical inner core (7) through a threaded connection.

7. The connection structure between a concealed wooden pillar and an enclosure wall according to claim 2, characterized in that: The outer end of the connecting rod (4) is slidably connected to a preload spring (20). The end of the preload spring (20) close to the conical inner core (7) abuts against the conical inner core (7), and the end of the preload spring (20) away from the conical inner core (7) abuts against the locking ring (16).

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