CN117006138A - Quick butt joint structure of rectangular pipe - Google Patents

Abstract

The invention discloses a rectangular pipe quick butt joint structure, which comprises two rectangular pipes, wherein the side wall of the rectangular pipe near the butt joint end face is provided with a mounting hole penetrating through the rectangular pipe; setting the hole distance between two mounting holes after the end surfaces of the two rectangular pipes are mutually abutted as A; a liner tube insertable into the rectangular tube lumen; two connecting holes with the same size as the mounting holes are formed in the side wall of the liner tube; the pitch of the two connecting holes is set as B; wherein A is slightly larger than B; the liner tube is inserted into the joint between the two rectangular tubes; the two pin structural members are respectively inserted into the two pairs of staggered mounting holes and connecting holes in a penetrating way, so that the two rectangular pipes are driven to be relatively and tightly close to be connected into a whole. The invention can tightly and firmly butt-joint the two rectangular pipes, and the connecting device is arranged inside the rectangular pipes, does not increase the outer contour of the rectangular pipes, and is convenient to be used as a track.

Description

A quick docking structure for rectangular tubes

Technical field

The invention belongs to the technical field of profile installation and use, and is specifically a rectangular tube quick docking structure.

Background technique

Pipes with a rectangular cross-sectional profile are referred to as rectangular pipes. They have a hollow cavity inside and are characterized by light weight and high structural strength. They are used in a wide range of applications. In addition to being used to build structural members, rectangular tubes can also be used as tracks to provide a track foundation for the wheels of the running gear.

The docking of rectangular tubes is a common technical problem. However, when the rectangular tubes are used as tracks, the problems with the traditional rectangular tube docking method are: first, the joints between the two sections of rectangular tubes are large, they are not close enough to each other, and the wheels are bumpy when running; second, The structural strength of the joint is insufficient and it is difficult to provide sufficient support for the wheel; thirdly, the traditionally used connecting device expands the cross-sectional profile and easily becomes an obstacle for the wheel to travel; fourthly, in order to It is convenient for inspection and maintenance. It is not suitable to use welding when connecting two sections of rectangular pipes to maintain the disassembly and assembly state.

Contents of the invention

In order to overcome the deficiencies in the background technology, the present invention provides a rectangular tube quick docking structure, with the purpose of tightly and firmly docking two rectangular tubes to achieve sufficient connection strength; on this basis, strive to set the connecting device in Inside the rectangular tube, the outer contour of the rectangular tube is not increased so that it can be used as a track.

In order to achieve the above object, the present invention provides the following technical solution: a rectangular tube quick docking structure, including two rectangular tubes with the same cross-sectional shape; also including a liner tube and a pin structural member; near the butt end of the rectangular tube There are mounting holes that penetrate the rectangular tubes on the side walls of the At the docking point, two connection holes with the same size as the installation hole are provided on the side wall of the liner; the distance between the two connection holes is set to B; and the A is slightly larger than B, which is used when When two rectangular tubes are butted together, the centers of the connecting holes and the mounting holes are slightly misaligned; the two pin structural members are respectively inserted into the two misaligned pairs of mounting holes and connecting holes to drive the two The rectangular tubes are relatively close together and connected into one body.

As a further optimization, the outer contour of the liner tube corresponds to the inner wall of the rectangular tube, so that when the liner tube is inserted into the rectangular tube, all four inner walls of the rectangular tube can be covered by the liner. Top branch of tube.

As a further optimization, the length of the pin structural member is slightly less than or equal to the thickness of the rectangular tube, so that the upper and lower ends of the pin structural member do not exceed the outer wall of the rectangular tube.

As a further optimization, A is 0.5mm to 2mm larger than B.

As a further optimization, A is 1mm larger than B.

As a further optimization, both the rectangular tube and the liner tube are made of aluminum alloy.

As a further optimization, the pin structure includes an upper locking cone ring, a lower locking cone ring, a hexagon socket bolt and two expansion half rings; the upper and lower ends of the expansion half ring are provided with tapered hole surfaces, respectively. To cooperate with the tapered axial surfaces of the upper locking cone ring and the lower locking cone ring; the center of the upper locking cone ring is provided with a through hole; the center of the lower locking cone ring is provided with a threaded hole; The end of the hexagon socket bolt passes through the through hole and is then screwed into the threaded hole.

As a further optimization, the outer wall of the expansion half ring is provided with a groove for fitting a rubber band.

The present invention also provides a method for quick docking of rectangular tubes, which utilizes the above-mentioned quick docking structure of rectangular tubes and includes the following steps:

S1: Insert the liner into the joint between the two rectangular tubes so that the center of the connecting hole and the installation hole are slightly misaligned;

S2: Insert the two pin structure members into the two offset pairs of mounting holes and connecting holes respectively, so that the two rectangular tubes are relatively close to each other and connected into one body.

The beneficial effects of the present invention are:

(1) The joints between two sections of rectangular tubes are tight enough to reduce the bumps when the wheels are running;

(2) The joint between the two rectangular tubes has high structural strength and can provide sufficient support for the wheels;

(3) The connecting device does not protrude from the outer contour of the rectangular tube, but is embedded inside the rectangular tube, making it easy to use as a track;

(4) The pin structural parts can be quickly and easily disassembled and repaired.

In short, the present invention can closely and firmly connect two rectangular tubes, and the connecting device is arranged inside the rectangular tube without increasing the outer contour of the rectangular tube, making it easy to use as a track.

Description of the drawings

Figure 1 is a schematic diagram of the working principle of the docking structure according to Embodiment 1 of the present invention;

Figure 2 is an exploded schematic diagram of the docking structure according to Embodiment 1 of the present invention;

Figure 3 is a schematic cross-sectional structural view of the pin structure member according to Embodiment 1 of the present invention;

Figure 4 is a schematic structural diagram of the rectangular bent pipes in Embodiment 2 of the present invention when they are butted.

The corresponding relationship between the technical features and reference numbers in the figure is: rectangular tube 1; mounting hole 11; liner tube 2; connecting hole 21; pin structural member 3; upper locking cone ring 31; lower locking cone ring 32; inner hexagon Bolt 33; expansion half ring 34; tapered hole surface 35; tapered shaft surface 36; through hole 37; threaded hole 38; groove 39; rectangular elbow 4.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention. Obviously, the described embodiments are only some of the preferred embodiments of the present invention, rather than all the embodiments. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of the present invention.

Embodiment 1: Please refer to Figure 1-3;

The present invention provides the following technical solution: a rectangular tube quick docking structure, which is used for docking two rectangular tubes 1 with identical cross-sectional shapes and used as a track. The exemplary rectangular tube 1 is an aluminum alloy profile, which is easy to manufacture, has low cost and has strong load-bearing capacity; specifically, it includes two rectangular tubes 1, a liner tube 2 and a pin structural member 3;

The side walls of the rectangular tube 1 near the butt end surfaces are provided with mounting holes 11 that penetrate the rectangular tube 1; so that the distance between the two mounting holes 11 after the end surfaces of the two rectangular tubes 1 abut each other is set to A. ; More preferably, the distance from the two mounting holes 11 to the end face is equal, so that the structure of both ends of each rectangular member is exactly the same, which improves versatility and facilitates installation.

The liner tube 2 can be inserted into the inner cavity of the rectangular tube 1; two connection holes 21 with the same size as the installation hole 11 are opened on the side wall of the liner tube 2; the distance between the two connection holes 21 is set. is B; where A is slightly larger than B; the center of the connecting hole 21 and the mounting hole 11 can be slightly misaligned. An exemplary misalignment amount is that A is 0.5 to 2 mm larger than B.

when using it:

S1: Insert the liner tube 2 into the joint between the two rectangular tubes 1 so that the centers of the connecting hole 21 and the mounting hole 11 are slightly misaligned;

S2: Insert the two pin structural members 3 into the two offset pairs of mounting holes 11 and connecting holes 21 respectively, thereby driving the two rectangular tubes 1 to be relatively close together and connected into one body; for example, The shaft diameter of the part where the pin structure member 3 contacts the mounting hole 11 and the connecting hole 21 is the same as the hole diameter of the mounting hole 11, with appropriate tightness and firm fixation; the end of the pin structure member 3 is provided with a chamfer to facilitate insertion. misaligned mounting holes 11 and connecting holes 21.

The working principle is that when the pin structural member 3 is inserted into the misaligned mounting hole 11 and the connecting hole 21, for example, tapping is used to insert the pin structural member 3 (such as a cylindrical pin) into the mounting hole 11 and the connecting hole 21; due to A Slightly larger than B; using the elastic deformation of the rectangular tube 1 and the liner tube 2, the liner tube 2 is in a pulling state, and the two rectangular tubes 1 are in a mutually extruding state, forcing the two rectangular tubes 1 to be relatively close and connected. into one. Thus, the effect of narrowing the joints and making the connection tight is achieved, and the liner tube 2 inserted inside the rectangular tube 1 provides supporting force and provides sufficient strength for the joints. Furthermore, the pin structure 3 is clearly detachable, so that the two connected rectangular tubes 1 are detachable. During disassembly, the pin structure member 3 can be pushed out from the mounting hole 11 and the connecting hole 21 by tapping. On this basis, it is more preferable to set the length of the pin structure member 3 to be slightly less than or equal to the thickness of the rectangular tube 1 so that the upper and lower ends of the pin structure member 3 do not exceed the rectangular tube. 1 outer wall. Therefore, the connecting device can be arranged inside the rectangular tube 1 without increasing the outer contour of the rectangular tube 1 so as to facilitate its use as a track.

In order to further improve the supporting force, the outer contour of the liner tube 2 is set to correspond to the inner wall of the rectangular tube 1, so that when the liner tube 2 is inserted into the rectangular tube 1, the four edges of the rectangular tube 1 The inner wall can be supported by the liner tube 2 . In other words, the liner pipe 2 cannot rock inside the rectangular pipe 1, and the loads borne by the rectangular pipe 1 in all directions can be transferred to the liner pipe 2.

In a more preferred embodiment, A is set to be 1 mm larger than B; the tightening force is moderate. The liner 2 is also made of aluminum alloy, which is easy to form and simple to produce.

More preferably, the pin structure 3 is made expandable and includes an upper locking cone ring 31, a lower locking cone ring 32, an inner hexagonal bolt 33 and two expansion half rings 34; the expansion half rings 34 The upper and lower ends are provided with tapered hole surfaces 35, respectively used to cooperate with the tapered axial surfaces 36 of the upper locking cone ring 31 and the lower locking cone ring 32; the center of the upper locking cone ring 31 is provided with Through hole 37; a threaded hole 38 is provided in the center of the lower locking cone ring 32; the end of the hexagon socket bolt 33 can pass through the through hole 37 and then be screwed into the threaded hole 38.

The working principle of the expandable pin structure 3 is that when the end of the hexagon socket bolt 33 can pass through the through hole 37 and then be screwed into the threaded hole 38, during the continuous screwing process, the upper locking cone will The ring 31 and the lower locking cone ring 32 draw each other together, and use the tapered hole surface 35 to cooperate with the tapered shaft surface 36 to force a pair of expansion half rings 34 to expand radially until they tighten. The method of use at this time is to first insert the pre-closed pair of expansion half rings 34 together with the hexagon socket bolts 33 and the upper locking cone ring 31 and the lower locking cone ring 32 into the mounting hole 11 and the connecting hole 21 as a whole. At this time, it has not expanded radially, so it is easy to insert without knocking, making it easy to operate. After inserting it in place, screw the hexagon socket bolts 33 to drive the pair of expansion half rings 34 to expand, so that the liner tube 2 is in a pulling state, and the two rectangular tubes 1 are in a mutually extruding state, forcing the two rectangular tubes 1 to face each other. Close together and connected into one. Similarly, when it is necessary to disassemble, the hexagon socket bolt 33 is reversely screwed to release the tension, and the pair of expansion half rings 34 are closed, and can be easily pulled out without knocking, thereby improving the ease of disassembly and assembly of the pin structure 3. Convenience; and the degree of relative close proximity of the two rectangular tubes 1 can be adjusted by expansion.

In order to further improve the convenience, the pair of expansion half rings 34 together with the hexagon socket bolts 33 and the upper locking cone ring 31 and the lower locking cone ring 32 are used as an integral pin structure 3 for easy access without causing any natural problems. Scattered. The outer wall of the expansion half ring 34 is provided with a groove 39 for inserting a rubber band. After the rubber band is put on, the radial direction of the pair of expansion half rings 34 is constrained. In the axial direction, the upper locking cone ring 31 and the lower locking cone ring 32 opposite to each other at the small end make the hexagon socket bolt 33 and the upper locking cone The ring 31 and the lower locking cone ring 32, as inner core components, cannot axially come out of the pair of expansion half rings 34; and when the pair of expansion half rings 34 expand, the elastic rubber band does not hinder the expansion of the half rings. 34 rose to open.

The benefits of this embodiment are:

(1) The joints between the two sections of rectangular tube 1 are tight enough to reduce the bumps when the wheels are running;

(2) The joint between the two rectangular tubes 1 has high structural strength and can provide sufficient support for the wheels;

(3) The connecting device does not protrude from the outer contour of the rectangular tube 1, but is embedded inside the rectangular tube 1, making it easy to use as a track;

(4) The pin structure member 3 can be quickly and easily disassembled and assembled, and the maintenance is convenient.

In short, the two rectangular tubes 1 are closely and firmly connected, and the connecting device is arranged inside the rectangular tube 1 without increasing the outer contour of the rectangular tube 1, making it easy to use as a track.

Embodiment 2: Please refer to Figure 4;

This embodiment adopts the same docking structure as that of Embodiment 1. The difference is that one end of the liner pipe 2 is curved, so that one end of the liner pipe 2 can be inserted into a curved rectangular pipe (ie, a rectangular elbow pipe 4), so that the method of Embodiment 1 can be applied to an arc-shaped pipe. in a curved track. That is to say, the rectangular bent pipe 4 can also be connected by applying the structure and method of Embodiment 1, and the same technical effect as that of Embodiment 1 is achieved.

The parts not described in detail in the present invention are prior art; for those of ordinary skill in the art, the technical features of the above embodiments can be combined in any way. In order to simplify the description, each technical feature in the above embodiments is not described. All possible combinations of features are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. The scope of the invention is defined by the appended claims and their equivalents.

Claims (8)

1. A rectangular pipe quick butt joint structure comprises two rectangular pipes (1) with the same cross section shape; the method is characterized in that: the lining pipe (2) and the pin structural member (3) are also included;

a mounting hole (11) penetrating through the rectangular pipe (1) is formed in the side wall, close to the butt joint end surface, of the rectangular pipe (1); the hole distance between the two mounting holes (11) after the end surfaces of the two rectangular pipes (1) are mutually abutted is set as A;

the liner tube (2) is inserted into the butt joint position between the two rectangular tubes (1), and two connecting holes (21) with the same size as the mounting holes (11) are formed in the side wall of the liner tube (2); the hole distance of the two connecting holes (21) is set to be B, and the A is slightly larger than the B, so that when the two rectangular pipes (1) are in butt joint, the centers of the connecting holes (21) and the mounting holes (11) are slightly misplaced;

the two pin structural members (3) are respectively inserted into the two pairs of the mounting holes (11) and the connecting holes (21) which are staggered in a penetrating way and are used for driving the two rectangular pipes (1) to be opposite and tightly close to be connected into a whole.

2. The rectangular tube quick docking structure of claim 1, wherein: the outer contour of the liner tube (2) corresponds to the inner walls of the rectangular tube (1), and the liner tube is used for being propped up by the liner tube (2) when the liner tube (2) is inserted into the rectangular tube (1).

3. The rectangular tube quick docking structure of claim 1, wherein: the length of the pin structural member (3) is slightly smaller than or equal to the thickness of the rectangular tube (1), and the upper end and the lower end of the pin structural member (3) do not exceed the outer wall of the rectangular tube (1).

4. The rectangular tube quick docking structure of claim 1, wherein: a is 0.5mm to 2mm larger than B.

5. The rectangular tube rapid docking structure of claim 4, wherein: a is 1mm larger than B.

6. The rectangular tube quick docking structure of claim 1, wherein: the rectangular pipe (1) and the liner pipe (2) are made of aluminum alloy materials.

7. The rectangular tube quick docking structure of claim 1, wherein: the pin structural member (3) comprises an upper locking taper ring (31), a lower locking taper ring (32), an inner hexagon bolt (33) and two expansion half rings (34); conical hole surfaces (35) are arranged at the upper end and the lower end of the expansion semi-ring (34) and are respectively matched with conical shaft surfaces (36) of the upper locking conical ring (31) and the lower locking conical ring (32); a through hole (37) is formed in the center of the upper locking taper ring (31); a threaded hole (38) is formed in the center of the lower locking taper ring (32); the tail end of the inner hexagon bolt (33) passes through the through hole (37) and is screwed in the threaded hole (38).

8. The rectangular tube rapid docking structure of claim 7, wherein: the outer wall of the expansion semi-ring (34) is provided with a groove (39) for sleeving the rubber band.