A non-detachable multi-section rod connecting structure

Abstract

The application relates to the technical field of multi-section rod connecting structures, in particular to a non-detachable multi-section rod connecting structure which comprises a main rod, a clamping block and a connecting rod. The end of the main rod is provided with a stepped boss, the stepped boss comprises a limiting section and a connecting section, the connecting section comprises a connecting column and an anti-falling top block, and the two ends of the connecting column are fixedly connected with the limiting section and the anti-falling top block respectively. The connecting rod is a rod-shaped component, and an annular clamping groove is arranged on the inner wall of the connecting rod. The clamping block is a hollow elastic component which comprises a large-size end, a small-size end and an annular protrusion, the annular protrusion is fixedly arranged on the outer side of the large-size end, a plurality of deformation grooves for adjusting the diameter are arranged on the large-size end and the small-size end, and the clamping block has a radial shrinkage deformation state and a radial expansion deformation state under the action of the plurality of deformation grooves. The application has the effect of non-detachably connecting the multi-section rod.

Description

Technical Field

[0001] This application relates to the field of multi-segment rod connection structure technology, and in particular to a non-detachable multi-segment rod connection structure. Background Technology

[0002] Currently, applications such as Olympic barbells in the fitness industry and extended connecting tubes in industrial settings require connecting multiple sections of the bar according to specific needs. Traditional multi-section bar connection methods mainly include the following three: ① Threaded connection: This connects multiple sections of the bar through the engagement of internal and external threads. While simple in structure, this connection is prone to loosening due to external forces or vibrations during long-term use, resulting in poor connection stability and significant safety hazards; ② Spring pin connection: This connection achieves non-removable properties by using a spring pin embedded in a pin hole, mitigating the risk of loosening to some extent. However, the spring pin is easily lost during installation, and the parts have poor integration; ③ Bolt connection: This requires the use of specialized tools such as wrenches for assembly, and bolts are prone to loosening under long-term stress, making it difficult to guarantee connection stability and safety. Furthermore, bolts are also easily lost.

[0003] In summary, neither threaded connections nor bolted connections can provide a non-removable connection for multi-section rods, and the connection stability and safety are poor. Although spring pin connections achieve a certain degree of non-removability, parts are easily lost, and the alignment and assembly process is relatively cumbersome, making the connection of multi-section rods less convenient. Utility Model Content

[0004] To reduce the cumbersome process of connecting multi-segment rods and the problems of poor connection stability and safety, this application provides a non-removable multi-segment rod connection structure.

[0005] This application provides a non-detachable multi-segment rod connection structure, which adopts the following technical solution: A non-detachable multi-segment rod connection structure includes: a main rod, a locking block, and a connecting rod.

[0006] The end of the main rod is provided with a stepped boss, which includes a limiting section and a connecting section. The connecting section includes a connecting post and an anti-detachment block. The two ends of the connecting post are fixedly connected to the limiting section and the anti-detachment block, respectively. The diameter of the connecting post is smaller than the diameter of the limiting section.

[0007] The connecting rod is a rod-shaped component, and an annular groove is formed on the inner wall of the connecting rod.

[0008] The locking block is a hollow elastic component. The locking block includes a large-size end, a small-size end, and an annular protrusion. The annular protrusion is fixedly disposed on the outside of the large-size end. Both the large-size end and the small-size end are provided with multiple deformation grooves for adjusting the diameter.

[0009] The card block can exhibit both radial contraction and radial expansion deformation states under the action of multiple deformation grooves.

[0010] By adopting the above technical solution, during use, the large and small ends can undergo radial contraction and radial expansion deformation under the action of the deformation groove. After the large end undergoes radial contraction deformation, the locking block is assembled into the connecting rod. When the large end moves to the position that matches the annular groove, the large end elastically returns to its original shape, and the locking block is initially fixed by the cooperation of the annular protrusion and the annular groove. Subsequently, the main rod is inserted into the connecting rod axially. During the assembly of the main rod, the limiting section and the anti-detachment block will squeeze the small end, causing the small end to undergo radial expansion deformation, allowing the anti-detachment block to pass through the small end. When the anti-detachment block has completely passed through the small end, the small end elastically returns to its original shape. At this time, the locking block is sleeved on the outside of the connecting column, and at the same time, the end of the annular protrusion near the main rod abuts against the limiting section, realizing the function of reverse retraction and limiting of the main rod.

[0011] Optionally, the axial length of the card block is less than the axial length of the connecting column.

[0012] By adopting the above technical solution, the stability of the locking block sleeved on the outside of the connecting column during the insertion and assembly process of the main rod is ensured, thereby ensuring the stability of the locking block in connecting and limiting the main rod and the connecting rod.

[0013] Optionally, when the locking block is in its natural state, the inner diameter of the large-size end is smaller than the diameter of the limiting section, and the outer diameter of the annular protrusion is larger than the inner diameter of the connecting rod. When the locking block is in a radially contracting deformation state, the outer diameter of the annular protrusion is smaller than the inner diameter of the connecting rod. When the locking block is in a radially expanding deformation state, the inner diameters of the large-size end and the small-size end are larger than the diameter of the limiting section.

[0014] By adopting the above technical solution, it is easy to form a stepped surface by cooperating with the limiting section and the connecting section during use, and then the large-size end and the annular protrusion can be assembled and limited by the stepped surface.

[0015] Optionally, the axial thickness of the annular protrusion is less than the axial length of the annular groove, and the outer diameter of the annular protrusion is less than the inner diameter of the annular groove.

[0016] By adopting the above technical solution, the smoothness of the annular groove engaging with the annular protrusion is ensured, thereby improving the convenience of assembling the card block into the connecting rod.

[0017] Optionally, the inner walls at both ends of the connecting rod and the outer side of the limiting section are provided with matching guide structures.

[0018] By adopting the above technical solution and setting a guide structure, the insertion and assembly process of the main rod and the connecting rod can be guided, thereby improving the stability of the connection between the main rod and the connecting rod.

[0019] In summary, the embodiments of this application provide a non-detachable multi-segment rod connection structure, which includes at least one of the following beneficial technical effects: 1. By using the cooperation between the locking block and the annular slot, the locking block can be assembled inside the connecting rod, reducing the risk of locking block loss and improving the integration of parts; 2. By using stepped bosses, locking blocks, and annular grooves, multi-section rods are connected in a non-detachable manner, ensuring the stability of the multi-section rod connection, reducing the risk of loosening due to external forces or vibrations after the multi-section rod connection is established, and lowering the safety hazards of the multi-section rod connection. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a non-detachable multi-segment rod connection structure provided in an embodiment of this application; Figure 2 This is a schematic diagram of the stepped boss and locking block in a non-removable multi-segment rod connection structure provided in an embodiment of this application; Figure 3 A cross-sectional view of the connection state of a non-detachable multi-segment rod connection structure provided in an embodiment of this application; Figure 4 for Figure 3 Enlarged view of the structure at point A in the middle; Figure 5 A schematic diagram of the assembly state of the stepped boss and the locking block in a non-removable multi-segment rod connection structure provided in an embodiment of this application; Figure 6 This is a schematic diagram of the multi-segment assembly state of a non-detachable multi-segment rod connection structure provided in an embodiment of this application.

[0021] Explanation of the markings in the image: 1. Main rod; 101. Limiting section; 102. Connecting section; 1021. Connecting column; 1022. Anti-detachment block; 2. Connecting rod; 3. Locking block; 301. Large size end; 302. Small size end; 303. Annular protrusion; 304. Deformation groove. Detailed Implementation

[0022] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0023] Combination Figure 1 and Figure 2 This application discloses a non-detachable multi-segment rod connection structure, including: a main rod 1, a locking block 3, and a connecting rod 2. In practical applications, the locking block 3 provides a non-detachable connection between the main rod 1 and the connecting rod 2, improving the connection stability between the main rod 1 and the connecting rod 2.

[0024] Combination Figure 2 and Figure 4 The main rod 1 has a stepped boss at its end. The stepped boss includes a limiting section 101 and a connecting section 102. The connecting section 102 includes a connecting post 1021 and an anti-detachment block 1022. The two ends of the connecting post 1021 are fixedly connected to the limiting section 101 and the anti-detachment block 1022, respectively. The diameter of the connecting post 1021 is smaller than the diameter of the limiting section 101. This design facilitates the formation of a stepped surface at the contact point between the limiting section 101 and the connecting post 1021. The stepped surface, in conjunction with the large-size end 301 and the annular protrusion 303, helps to limit the assembly of the locking block 3.

[0025] Combination Figure 2 and Figure 4 The locking block 3 is a hollow elastic component. The main rod 1 and the connecting rod 2 are connected in a non-detachable manner through the locking block 3.

[0026] Combination Figure 2 and Figure 4 The locking block 3 includes a large-size end 301, a small-size end 302, and an annular protrusion 303, which is fixedly disposed on the outer side of the large-size end 301. The locking block 3 is retracted and limited by the cooperation between the annular protrusion 303 and the annular locking groove.

[0027] Combination Figure 2 Both the large-size end 301 and the small-size end 302 are provided with multiple deformation grooves 304 for adjusting the diameter. This allows for radial contraction or expansion of the large-size end 301 and the small-size end 302 by contracting the multiple deformation grooves 304.

[0028] Specifically, the axial length of the locking block 3 is less than the axial length of the connecting post 1021. This ensures the stability of the locking block 3 on the outside of the connecting post 1021 during the insertion and assembly of the main rod 1, thereby ensuring the stability of the locking block 3 in connecting and limiting the main rod 1 and the connecting rod 2.

[0029] Combination Figure 2 and Figure 4When the locking block 3 is in its natural state, the inner diameter of the large-size end 301 is smaller than the diameter of the limiting section 101, and the outer diameter of the annular protrusion 303 is larger than the inner diameter of the connecting rod 2. This facilitates the formation of a stepped surface through the cooperation of the limiting section 101 and the connecting section 102, thereby enabling assembly and limiting of the large-size end 301 and the annular protrusion 303 through the stepped surface.

[0030] The axial thickness of the annular protrusion 303 is less than the axial length of the annular groove, and the outer diameter of the annular protrusion 303 is less than the inner diameter of the annular groove. This ensures the smooth fit between the annular groove and the annular protrusion 303, thereby improving the ease of assembling the locking block 3 into the connecting rod 2.

[0031] It is worth noting that the locking block 3, under the action of multiple deformation grooves 304, exhibits both radial contraction and radial expansion deformation states. In the radial contraction deformation state, the outer diameter of the annular protrusion 303 is smaller than the inner diameter of the connecting rod 2. In the radial expansion deformation state, the inner diameters of the large end 301 and the small end 302 are larger than the diameter of the limiting section 101. The locking block 3 is assembled into the connecting rod 2 in the radial contraction deformation state, and fitted onto the outside of the connecting section 102 in the radial expansion deformation state.

[0032] Preferably, there are eight deformation grooves 304, which are symmetrically arranged on the large-size end 301 and the small-size end 302, thereby reducing the force required for radial contraction deformation and radial expansion deformation of the large-size end 301 and the small-size end 302.

[0033] It is worth noting that the axial length of the deformation groove 304 is half the axial length of the locking block 3. This reduces the force required to radially contract or expand the large-size end 301 and the small-size end 302, and improves the ease of assembling the locking block 3.

[0034] Combination Figure 3 Connecting rod 2 is a rod-shaped component. It can be opened at both ends or at one end according to actual connection needs.

[0035] The connecting rod 2 can be cylindrical or cuboid, and the cross-section of the opening can be circular or square. The shape of the locking block 3 can be adaptively adjusted according to the change of the inner wall shape of the opening of the connecting rod 2.

[0036] Specifically, annular grooves for limiting the annular protrusion 303 are provided on the inner walls of both ends of the connecting rod 2. The annular grooves and annular protrusion 303 are used for assembly and limiting.

[0037] The inner walls at both ends of the connecting rod 2 and the outer side of the limiting section 101 are equipped with matching guide structures. By setting the guide structures, the insertion and assembly process of the main rod 1 and the connecting rod 2 can be guided, thereby improving the stability of the connection between the main rod 1 and the connecting rod 2.

[0038] Specifically, the guide structure is one of internal or external threads or axial guide ribs.

[0039] Preferably, the guide structure is internal and external threads, that is, the outer side of the limiting section 101 is provided with external threads, and the two ends of the connecting rod 2 are provided with meshing internal threads. The limiting section 101 and the connecting rod 2 are connected, guided and assisted in limiting by the internal and external threads.

[0040] In practical use, when connecting the main rod 1 and the connecting rod 2, firstly, the large-size end 301 is radially contracted and deformed before the locking block 3 is assembled into the connecting rod 2. When the large-size end 301 moves to the position that matches the annular groove, the large-size end 301 elastically returns to its original shape, and the locking block 3 is initially fixed by the cooperation of the annular protrusion 303 and the annular groove. Subsequently, the main rod 1 is inserted axially into the connecting rod 2. During the assembly of the main rod 1, the anti-detachment top block 1022 will squeeze the small-size end 302, causing the small-size end 302 to undergo radial expansion deformation until the anti-detachment top block 1022 can pass through the small-size end 302. After the anti-detachment top block 1022 has completely passed through the small-size end 302, the small-size end 302 elastically returns to its original shape. At this time, the locking block 3 is fitted onto the outside of the connecting post 1021. Simultaneously, the end of the annular protrusion 303 near the main rod 1 abuts against the limiting section 101, realizing the function of limiting the reverse retraction of the main rod 1. Through the cooperation of the annular protrusion 303 with the annular groove and the limiting section 101, and the cooperation of the anti-detachment top block 1022 with the small-sized end 302, the stepped boss and the connecting rod 2 are connected in a non-detachable manner, thereby realizing the function of non-detachable connection between the main rod 1 and the connecting rod 2.

[0041] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A non-detachable multi-segment rod connection structure, characterized in that, include: The main rod (1) has a stepped boss at its end. The stepped boss includes a limiting section (101) and a connecting section (102). The connecting section (102) includes a connecting post (1021) and an anti-detachment block (1022). The two ends of the connecting post (1021) are fixedly connected to the limiting section (101) and the anti-detachment block (1022) respectively. The diameter of the connecting post (1021) is smaller than the diameter of the limiting section (101). The connecting rod (2) is a rod-shaped component, and an annular groove is provided on the inner wall of the connecting rod (2); The locking block (3) is a hollow elastic component. The locking block (3) includes a large-size end (301), a small-size end (302) and an annular protrusion (303). The annular protrusion (303) is fixedly disposed on the outside of the large-size end (301). Both the large-size end (301) and the small-size end (302) are provided with multiple deformation grooves (304) for adjusting the diameter. The card block (3) is in a radial contraction deformation state and a radial expansion deformation state under the action of multiple deformation grooves (304).

2. The non-detachable multi-segment rod connection structure according to claim 1, characterized in that: The axial length of the card block (3) is less than the axial length of the connecting column (1021).

3. The non-detachable multi-segment rod connection structure according to claim 1, characterized in that: When the card block (3) is in its natural state, the inner diameter of the large end (301) is smaller than the diameter of the limiting section (101), and the outer diameter of the annular protrusion (303) is larger than the inner diameter of the connecting rod (2).

4. The non-detachable multi-segment rod connection structure according to claim 3, characterized in that: When the locking block (3) is in a radially contracted deformation state, the outer diameter of the annular protrusion (303) is smaller than the inner diameter of the connecting rod (2), which is used to insert the locking block (3) into the connecting rod (2). When the locking block (3) is in a radially expanded deformation state, the inner diameter of the large-size end (301) and the small-size end (302) is larger than the diameter of the limiting section (101), which is used to pass the connecting section (102) through the locking block (3).

5. The non-detachable multi-segment rod connection structure according to claim 3, characterized in that: The axial thickness of the annular protrusion (303) is less than the axial length of the annular groove, and the outer diameter of the annular protrusion (303) is less than the inner diameter of the annular groove.

6. The non-detachable multi-segment rod connection structure according to claim 1, characterized in that: The inner walls at both ends of the connecting rod (2) and the outer side of the limiting section (101) are provided with matching guide structures.

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