CN212584080U - Pipe connecting piece, tee bend handrail pipe subassembly and cross handrail pipe subassembly - Google Patents

Abstract

The utility model relates to a tube coupling spare, tee bend handrail tube subassembly and four-way handrail tube subassembly, the tube coupling spare includes first casing and second casing, first casing sets up with the second casing relatively, enclose into the connecting hole that is used for assembling the handrail tube, first casing is equipped with connect the via hole, connect the via hole runs through the medial surface and the lateral surface of first casing, the inboard of second casing is equipped with supplementary arch with the position that connect the via hole corresponds, the face towards connect the via hole is the top surface on supplementary arch, supplementary bellied side is equipped with the standing groove that is used for placing the nut or places the hole, supplementary bellied top surface is equipped with the perforation that runs through to the standing groove or place the hole. Need not in order to realize the inboard tapping of the connection between first casing and the second casing at the second casing, only need in the inboard of second casing set up supplementary arch, standing groove or place hole and perforation can, effectively simplify manufacturing process.

Description

Pipe connecting piece, tee bend handrail pipe subassembly and cross handrail pipe subassembly

Technical Field

The utility model relates to a transportation equipment spare part technical field especially relates to a coupling spare, tee bend handrail tube subassembly and cross handrail tube subassembly.

Background

In transportation equipment, for example, on vehicles such as buses, subways or buses, handrail tubes need to be arranged for passengers to hold, and safety is guaranteed. The handrail tubes are arranged in various longitudinal and transverse modes, and the longitudinal and transverse staggered handrail tubes are connected by generally adopting connecting pieces to form an integral stable structure. The common connecting piece comprises two connecting shell structures, and the two connecting shells are oppositely connected to clamp the handrail tube between the two connecting shell structures, so that the connection between different handrail tubes is realized. And the two connecting shells are generally connected by bolts, and at the moment, the connecting shells need to be provided with threaded holes matched with the bolts. In order to make the integrity of the overall appearance of the connector high, it is preferable to dispose the threaded hole inside the connector housing so that the connector is not exposed. However, tapping in the connecting shell has the problems of complicated process, easy damage of the tapped thread on the connecting shell and low durability.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide a pipe connector, a three-way handrail pipe assembly and a four-way handrail pipe assembly, which are directed to the problems of complicated process and low durability due to easy damage of directly arranged threads.

The utility model provides a pipe connector, includes first casing and second casing, first casing with the second casing sets up relatively, encloses into the connecting hole that is used for assembling the handrail pipe, first casing is equipped with connect the via hole, connect the via hole runs through the medial surface and the lateral surface of first casing, the inboard of second casing with the position that connect the via hole corresponds is equipped with supplementary arch, supplementary protruding upward orientation connect the via hole's face is the top surface, supplementary bellied side is equipped with the standing groove that is used for placing the nut or places the hole, supplementary bellied top surface be equipped with run through to the standing groove or the perforation of placing the hole.

The scheme provides a pipe connecting piece, and when the pipe connecting piece is used, the first shell and the second shell can be connected together by utilizing the matching between the bolt and the nut, so that a pipe piece to be connected is clamped in the connecting hole. Specifically, a nut for connection may be placed in the placement groove or the placement hole, and a bolt may be inserted into the nut in the placement groove or the placement hole after passing through the connection through-hole and the through-hole in this order, and may be coupled to the nut in a mating manner, thereby connecting the first housing and the second housing together. The auxiliary protrusion, the placing groove or the placing hole and the through hole are only arranged on the inner side of the second shell, so that the manufacturing process is effectively simplified. And the second casing has a high integrity of appearance and does not have a hole or a groove, based on the fact that the auxiliary projection for providing the placement groove or the placement hole is located inside the second casing. Moreover, the nut can be repeatedly used for many times, the nut with higher strength and anti-loosening and anti-corrosion capabilities can be used, additional anti-loosening measures are not needed, the integral durability and reliability of the product are effectively improved, the service life of the product is prolonged, the nut is suitable for more complex working environments, and the market competitiveness of the pipe connecting piece is effectively improved. And, place the nut in standing groove or the standing hole can be changed, if the nut damages after using a period of time, can directly with the nut in standing groove or the standing hole is changed can, and need not change whole second casing. On the one hand, the cost is reduced, and on the other hand, the convenience of maintenance is improved.

In one embodiment, the first housing includes a connecting portion and a pressing portion, the pressing portion and the second housing enclose the connecting hole, a positioning pin is disposed on an inner side surface of the second housing opposite to the pressing portion, and the connecting through hole is disposed on the connecting portion.

In one embodiment, at least two connecting holes are provided, at least one connecting hole is a through hole, the connecting holes are arranged at intervals, the auxiliary protrusion is located between the adjacent connecting holes, and the connecting through hole is located between the adjacent connecting holes.

In one embodiment, the placing groove or the placing hole is opened toward the coupling hole.

In one embodiment, the nut further comprises a bolt and a nut, the nut is placed in the placing groove or the placing hole, the nut cannot rotate in the circumferential direction in the placing groove or the placing hole, the threaded hole of the nut is correspondingly communicated with the through hole, and the bolt penetrates through the connecting through hole and the through hole in sequence to be connected with the nut in a matched mode.

In one embodiment, a side wall of the placement groove or the placement hole, which is opposite to the outer circumferential surface of the nut, is a limiting wall surface, and a distance between the two limiting wall surfaces is smaller than the maximum outer diameter of the nut.

In one embodiment, a counter bore is arranged at a position where the connecting through hole is arranged on the outer side surface of the first shell, the counter bore is communicated with the connecting through hole, and a nut of the bolt is located in the counter bore.

In one embodiment, the number of the connecting through holes and the number of the auxiliary protrusions are multiple, and the connecting through holes and the auxiliary protrusions are arranged in a one-to-one correspondence manner.

The utility model provides a tee bend handrail pipe subassembly, is including violently managing, standpipe and foretell union coupling spare, the axis transverse distribution of first connecting hole, the connecting hole is two, and one of them is first connecting hole, and another is the second connecting hole, the axis vertical distribution of second connecting hole, violently manage and insert in the first connecting hole, the standpipe is inserted in the second connecting hole, connecting hole with supplementary arch all is located violently manage with between the standpipe.

The above-mentioned scheme provides a tee bend handrail tube subassembly, through adopting the pipe connecting piece described in any above-mentioned embodiment to link together horizontal pipe and standpipe, and in the connection process, directly place the nut in placing groove or placing hole, then pass the bolt in proper order through connecting through-hole and perforation after, insert in the nut in placing groove or placing hole, with the nut mating connection. Tapping is not needed to be carried out on the inner side of the second shell for matching with the nut, and the manufacturing process is effectively simplified.

A four-way handrail tube assembly comprises two transverse tubes, a vertical tube and any tube connecting piece, wherein the number of the connecting holes is three, two of the connecting holes are first connecting holes, the other connecting hole is a second connecting hole, the axes of the first connecting holes are transversely distributed, the axes of the second connecting holes are vertically distributed, the two first connecting holes are formed at two ends of the tube connecting piece respectively, the second connecting hole is positioned between the two first connecting holes, the second connecting holes are through holes, the two transverse tubes are inserted into the two first connecting holes respectively, and the vertical tube penetrates through the second connecting holes;

or include two standpipe, a violently pipe and above-mentioned any pipe connection spare, the connecting hole is three, and two of them are first connecting hole, and another is the second connecting hole, the axis vertical distribution of first connecting hole, the axis horizontal distribution of second connecting hole, two first connecting holes respectively the shaping are in the both ends of pipe connection spare, the second connecting hole is located between two first connecting holes, the second connecting hole is the through-hole, two the standpipe is inserted respectively in two first connecting holes, violently the pipe runs through the second connecting hole.

The above-described aspect provides a four-way handrail tube assembly that utilizes the tube connectors described in any of the above embodiments to connect two horizontal tubes to one vertical tube, or two vertical tubes to one horizontal tube. And in order to realize the connection of the first shell and the second shell, the auxiliary bulge is arranged on the inner side of the second shell, and the placing groove or the placing hole is arranged in the auxiliary bulge, so that the bolt can be sequentially connected with the nut in a matching way after passing through the connecting through hole and the through hole. Tapping on the second shell is not needed for connecting the first shell and the second shell, and only the auxiliary protrusions are arranged and the placing grooves or the placing holes and the through holes are arranged on the auxiliary protrusions, so that the difficulty of the manufacturing process is effectively reduced, and the manufacturing process is simplified.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic structural view of a four-way handrail assembly according to the present embodiment;

FIG. 2 is an exploded view of the pipe connector in the four-way handrail pipe assembly of FIG. 1;

FIG. 3 is a schematic view of the four-way armrest tube assembly of FIG. 1 with a portion of the structure hidden;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

FIG. 5 is a schematic structural view of the three-way handrail assembly of the present embodiment;

FIG. 6 is an exploded view of a pipe coupling in the three-way handrail pipe assembly of FIG. 5;

FIG. 7 is a schematic view of the three-way elbow rest tube assembly shown in FIG. 5 with a portion of the structure hidden;

FIG. 8 is an enlarged view of a portion of FIG. 7 at B;

FIG. 9 is a schematic structural view of a second housing in the pipe coupling according to the present embodiment;

fig. 10 is a sectional view of the handle pipe according to the embodiment.

Description of reference numerals:

10. a three-way handrail tube assembly; 20. a four-way handrail tube assembly; 30. a transverse tube; 31. a vertical tube; 40. a tube connector; 41. a first housing; 411. a connecting through hole; 412. a connecting portion; 413. a pressing part; 42. a second housing; 421. an auxiliary projection; 422. a placement slot or a placement hole; 423. perforating; 424. a positioning pin 43, a first connection hole; 44. a second connection hole; 45. a bolt; 46. a nut; 50. a handrail tube.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In one embodiment, as shown in fig. 2 and 6, a pipe connection 40 is provided, the pipe connection 40 being capable of being used in a three-way handrail pipe assembly 10 or a four-way handrail pipe assembly 20, as shown in fig. 1 and 5. Specifically, as shown in fig. 1, 2, 5 and 6, the pipe connector 40 includes a first housing 41 and a second housing 42, and the first housing 41 and the second housing 42 are disposed opposite to each other to define a connection hole for assembling the handrail pipe. Specifically, the number of the connection holes is at least two, and one portion is the first connection hole 43, and the other portion is the second connection hole 44. During use, the handrail tubes to be connected can be put into the first connecting hole 43 and the second connecting hole 44, so that the handrail tubes are clamped between the first shell 41 and the second shell 42 to connect the handrail tubes.

Further, at least one of the connection holes is a through hole through which the handle pipe 50 can pass when being installed.

Further, as shown in fig. 2 and 5, the first housing 41 is provided with a connecting through hole 411, and the connecting through hole 411 penetrates through the inner side surface and the outer side surface of the first housing 41. An auxiliary protrusion 421 is disposed at a position corresponding to the connection through hole 411 on the inner side of the second housing 42, and a surface of the auxiliary protrusion 421 facing the connection through hole 411 is a top surface. The side surface of the auxiliary projection 421 is provided with a placing groove 422 or a placing hole for placing the nut 46, and the top surface of the auxiliary projection 421 is provided with a through hole 423 penetrating to the placing groove 422 or the placing hole.

The pipe connector 40 provided by the above scheme can connect the first shell 41 and the second shell 42 together by utilizing the matching between the bolt 45 and the nut 46 when in use, so as to clamp the pipe fittings to be connected in the connecting holes respectively. Specifically, the nut 46 for connection may be placed in the placement groove 422 or the placement hole, and the bolt 45 may be inserted into the nut 46 in the placement groove 422 or the placement hole after sequentially passing through the connection through-hole 411 and the through-hole 423, to be coupled with the nut 46, thereby connecting the first housing 41 and the second housing 42 together. The auxiliary protrusions 421, the placing grooves 422 or the placing holes and the through holes 423 are only arranged on the inner side of the second shell 42 without tapping the inner side of the second shell 42 in order to realize the connection between the first shell 41 and the second shell 42, thereby effectively simplifying the manufacturing process.

And based on the auxiliary protrusions 421 for providing the placement grooves 422 or the placement holes being located on the inner side of the second housing 42, the integrity of the appearance of the second housing 42 is high, effectively improving the market competitiveness of the pipe connection 40. Also, the nuts 46 placed in the placement grooves 422 or the placement holes may be replaced, and if the nuts 46 are damaged after a certain period of use, the nuts 46 placed in the placement grooves 422 or the placement holes may be directly replaced without replacing the entire second housing 42. On the one hand, the cost is reduced, and on the other hand, the convenience of maintenance is improved.

Further, as shown in fig. 2 to 4 and fig. 6 to 8, in one embodiment, the first housing 41 includes a connection portion 412 and a pressing portion 413, the pressing portion 413 and the second housing 42 enclose the connection hole, and the connection through hole 411 is disposed on the connection portion 412. Therefore, in the connection process, the bolt 45 does not pass through the handrail tube when passing through the connection through hole 411 and the through hole 423 in sequence, and the handrail tube is completely pressed and fixed between the first shell 41 and the second shell 42. In other words, the through holes are not needed to be arranged on the handrail tube in the connection process, the completeness of the handrail tube is high, and the connection process is simple.

Further, as shown in fig. 9, in one embodiment, the inner side surface of the second housing 42 opposite to the pressing portion 413 is provided with a positioning pin 424. When the second housing 42 is connected with the first housing 41, the positioning pin 424 abuts against the handle tube 50, so as to further prevent the handle tube 50 from shaking in the connecting hole and the handle tube 50 from falling off or deviating.

More specifically, as shown in fig. 2 and 6, in one embodiment, there are at least two connection holes, each of the connection holes is spaced apart from another connection hole, the auxiliary protrusion 421 is located between adjacent connection holes, and the connection through hole 411 is located between adjacent connection holes.

When the bolt 45 passes through the connecting through hole 411 and the through hole 423 and is matched with the placing groove 422 or the nut 46 in the placing hole, the first shell 41 and the second shell 42 respectively press the handrail tubes on two sides of the auxiliary protrusion 421 and the connecting through hole 411, so that the connection between the handrail tubes is realized.

Further specifically, as shown in fig. 2 to 4, and 6 to 8, in one embodiment, the placing groove 422 or the placing hole is opened toward the coupling hole. In the assembling process, the nut 46 is placed into the placing groove 422 or the placing hole from the opening of the placing groove 422 or the placing hole, and the groove for forming the connecting hole on the first shell 41 or the second shell 42 provides a space for the placing process based on the opening of the placing groove 422 or the placing hole facing the connecting hole, thereby further improving the convenience of assembling. After the first shell 41 and the second shell 42 are connected and the handrail tube is clamped in the connecting hole, the handrail tube shields the opening of the placing groove 422 or the placing hole, so that the nut 46 in the placing groove 422 or the placing hole is effectively prevented from falling off, and the connection reliability is further improved.

Further, as shown in fig. 2 to 4, and fig. 6 to 8, in one embodiment, the pipe coupling 40 further includes a bolt 45 and a nut 46, the nut 46 is placed in the placement groove 422 or the placement hole, and the nut 46 is not rotatable in its own circumferential direction in the placement groove 422 or the placement hole. The threaded hole of the nut 46 is in corresponding communication with the through hole 423. The bolt 45 passes through the connecting through hole 411 and the through hole 423 in sequence to be matched and connected with the nut 46. Thereby connecting the first case 41 and the second case 42 together and clamping the handle pipe in the first coupling hole 43 and the second coupling hole 44.

Further, as shown in fig. 2 and fig. 6, in an embodiment, a counter bore is disposed at a position where the connection through hole 411 is disposed on the outer side surface of the first housing 41, and the counter bore is communicated with the connection through hole 411. When the bolt 45 is in place with the nut 46, as shown in FIG. 1, the nut of the bolt 45 is seated in the counterbore. The pipe joint 40 has a flat shape as a whole.

More specifically, in one embodiment, the side wall of the placement groove 422 or the placement hole opposite to the outer circumferential surface of the nut 46 is a limiting wall surface, and the distance between the two limiting wall surfaces is smaller than the maximum outer diameter of the nut 46. When the nut 46 is placed in the placement groove 422 or the placement hole, the nut 46 is stopped by the two stopper walls and does not rotate with the bolt 45 when the bolt 45 rotates relative to the nut 46, so that the nut 46 and the bolt 45 rotate relative to each other, and finally can be connected together.

Further, as shown in fig. 2 to 4 and fig. 6 to 8, in one embodiment, the connecting through holes 411 and the auxiliary protrusions 421 are multiple, and the connecting through holes 411 and the auxiliary protrusions 421 are arranged in a one-to-one correspondence manner.

Specifically, when the pipe connection member 40 is applied to the four-way handle pipe assembly 20 shown in fig. 1, the number of the connection through holes 411 and the auxiliary protrusions 421 is four, as shown in fig. 4. When the pipe coupling 40 is applied to the three-way handrail pipe as shown in fig. 5, the coupling through-hole 411 and the auxiliary protrusion 421 are two as shown in fig. 6.

Further specifically, as shown in fig. 1 to 8, in one embodiment, an axis of the first connection hole 43 intersects an axis of the second connection hole 44. The handrail pipes connected by the pipe connecting pieces 40 are arranged at a certain angle, and the proper pipe connecting pieces 40 can be selected according to actual conditions according to the specific angle. The angle between the axis of the first connection hole 43 and the axis of the second connection hole 44 in different types of pipe connectors 40 is not used to meet the needs of different occasions.

Further, in another embodiment, as shown in fig. 5, there is provided a three-way handrail tube assembly 10 comprising a cross tube 30, a vertical tube 31 and the above-mentioned tube connector 40. The number of the connecting holes is two, one of the connecting holes is a first connecting hole 43, the other connecting hole is a second connecting hole 44, the axes of the first connecting hole 43 are transversely distributed, and the axes of the second connecting hole 44 are vertically distributed. The cross tube 30 is inserted into the first coupling hole 43, the vertical tube 31 is inserted into the second coupling hole 44, and the coupling through-hole 411 and the auxiliary protrusion 421 are both located between the cross tube 30 and the vertical tube 31.

The above-mentioned solution provides the three-way handrail tube assembly 10, which connects the horizontal tube 30 and the vertical tube 31 by using the tube connector 40 described in any of the above-mentioned embodiments, and during the connection process, the nut 46 is directly placed in the placing slot 422 or the placing hole, and then the bolt 45 is inserted into the nut 46 in the placing slot 422 or the placing hole after passing through the connecting through hole 411 and the through hole 423 in sequence, and then is connected with the nut 46 in a matching manner. Tapping the inside of the second housing 42 for the engagement with the bolt 45 is not required, effectively simplifying the manufacturing process. Moreover, the connecting through hole 411 and the auxiliary protrusion 421 are located between the cross tube 30 and the vertical tube 31, in other words, the bolt 45 does not penetrate through the cross tube 30 and the vertical tube 31.

Specifically, the two connection through holes 411 and the auxiliary protrusion 421 are provided, and the first connection hole 43 and the second connection hole 44 are spaced apart from each other, as shown in fig. 5 to 8, and the auxiliary protrusion 421 is located at an end of the first connection hole 43 and at a side of the second connection hole 44. The opening of the placing groove 422 or the placing hole in the auxiliary protrusion 421 faces into the second coupling hole 44.

Further, in yet another embodiment, a four-way handrail tube assembly 20 is provided, as shown in fig. 1-4, comprising two cross tubes 30, one vertical tube 31 and a tube connector 40 as described in any one of the above. The number of the connecting holes is three, two of the connecting holes are first connecting holes 43, the other connecting hole is second connecting hole 44, the axes of the first connecting holes 43 are transversely distributed, and the axes of the second connecting holes 44 are vertically distributed. Two first connection holes 43 are respectively formed at both ends of the pipe connection member 40, the second connection hole 44 is positioned between the two first connection holes 43, and the second connection hole 44 is a through hole. The two cross tubes 30 are inserted into the two first connecting holes 43, and the vertical tube 31 passes through the second connecting hole 44.

Specifically, as shown in fig. 2 to 4, the number of the connection through holes 411 and the auxiliary protrusions 421 is four, two of the connection through holes 411 and two of the auxiliary protrusions 421 are located between one of the first connection holes 43 and the second connection hole 44, and the other two of the connection through holes 411 and two of the auxiliary protrusions 421 are located between the other one of the first connection holes 43 and the second connection hole 44. In other words, two of the auxiliary protrusions 421 are located at one end of one of the first connection holes 43, and the other two auxiliary protrusions 421 are located at one end of the other first connection hole 43; two sets of auxiliary protrusions 421 are respectively located at both sides of the second connection hole 44.

Alternatively, in yet another embodiment, the four-way handrail tube assembly 20 comprises two vertical tubes, one transverse tube and the tube connector 40 of any one of the above. The number of the connecting holes is three, two of the connecting holes are first connecting holes 43, the other connecting hole is second connecting hole 44, the axes of the first connecting holes 43 are vertically distributed, and the axes of the second connecting holes 44 are transversely distributed. Two first coupling holes 43 are formed at both ends of the pipe coupling 40, respectively, and the second coupling hole 44 is positioned between the two first coupling holes 43. The second connecting hole 44 is a through hole, the two vertical pipes are respectively inserted into the two first connecting holes 43, and the horizontal pipe penetrates through the second connecting hole 44.

The four-way handrail tube assembly 20 provided by the above-mentioned scheme utilizes the tube connecting member 40 described in any one of the above embodiments to connect two transverse tubes 30 with one vertical tube 31, or to connect two vertical tubes 31 with one transverse tube 30. Also, in order to connect the first housing 41 and the second housing 42, the auxiliary protrusion 421 is provided inside the second housing 42, and the placement groove 422 or the placement hole is provided in the auxiliary protrusion 421, so that the bolt 45 can be coupled to the nut 46 after passing through the coupling through-hole 411 and the through-hole 423 in sequence. Tapping on the second housing 42 is not needed for the connection between the first housing 41 and the second housing 42, but only the auxiliary protrusions 421 are provided, and the placement grooves 422 or the placement holes and the through holes 423 are provided on the auxiliary protrusions 421, thereby effectively reducing the difficulty of the manufacturing process and simplifying the manufacturing process.

Further, in one embodiment, the cross tube 30 and the vertical tube 40 are collectively referred to as a handrail tube 50, and as shown in fig. 10, the inner circle of the cross section of the handrail tube 50 in any of the above embodiments is quincunx. Compared with the traditional handrail tube with a circular inner ring of the cross section, the inner ring of the cross section of the handrail tube 50 is arranged to be quincunx, so that the strength of the handrail tube 50 can be effectively increased. Moreover, each bending point of the quincunx deforms slowly, the stress is more uniform when the bending is carried out, and the situations of folds, deformation and the like are not easy to occur.

Specifically, the bending radius of the handrail tube 50 is 60 mm-600 mm when the handrail tube is used. The outer diameter of the handrail tube 50 is 28 mm-35 mm, wherein the outer diameter refers to the diameter of the outer ring of the handrail tube 50; the wall thickness is 3 mm-5.5 mm.

Further, a cold-proof sleeve can be arranged outside the handrail tube 50, so that friction force during holding is increased, and sweat is prevented from corroding the handrail tube 50.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. The utility model provides a pipe connector, its characterized in that, includes first casing and second casing, first casing with the second casing sets up relatively, encloses into the connecting hole that is used for assembling the handrail pipe, first casing is equipped with connect the via hole, connect the via hole and runs through the medial surface and the lateral surface of first casing, the inboard of second casing with the position that connect the via hole corresponds is equipped with supplementary arch, supplementary protruding upward orientation connect the via hole's face is the top surface, supplementary bellied side is equipped with the standing groove or place the hole that are used for placing the nut, supplementary bellied top surface be equipped with run through to the perforation of standing groove or place the hole.

2. A pipe coupling according to claim 1, wherein said first housing includes a connecting portion and a pressing portion, said pressing portion and said second housing define said connecting hole, an inner side surface of said second housing opposite to said pressing portion is provided with a positioning pin, and said connecting through hole is provided in said connecting portion.

3. A pipe coupling according to claim 2, wherein there are at least two of said coupling holes, at least one of said coupling holes is a through hole, each of said coupling holes is spaced apart from each other, said auxiliary projection is located between adjacent ones of said coupling holes, and said coupling through hole is located between adjacent ones of said coupling holes.

4. A pipe coupling according to any one of claims 1 to 3, wherein the placement groove or placement hole opens towards the coupling hole.

5. The pipe coupling according to any one of claims 1 to 3, further comprising a bolt and a nut, the nut being placed in the placement groove or the placement hole, the nut being non-rotatable in its own circumferential direction in the placement groove or the placement hole, the threaded hole of the nut being in corresponding communication with the through hole, the bolt being in mating connection with the nut through the connecting through hole and the through hole in this order.

6. A pipe coupling according to claim 5, wherein the side wall of the placement groove or the placement hole opposite to the outer circumferential surface of the nut is a stopper wall surface, and the distance between the two stopper wall surfaces is smaller than the maximum outer diameter of the nut.

7. The pipe coupling according to claim 5, wherein a counter bore is provided at a position of the outer side surface of the first housing where the connection through-hole is provided, the counter bore is communicated with the connection through-hole, and a nut of the bolt is located in the counter bore.

8. A pipe coupling according to any one of claims 1 to 3, wherein a plurality of the coupling through-holes and the auxiliary projections are provided, and the coupling through-holes and the auxiliary projections are provided in one-to-one correspondence.

9. A three-way handrail tube assembly, comprising a cross tube, a vertical tube and the tube connector of any one of claims 1 to 8, wherein the number of the connection holes is two, one of the connection holes is a first connection hole, the other of the connection holes is a second connection hole, the axes of the first connection hole are distributed laterally, the axes of the second connection hole are distributed vertically, the cross tube is inserted into the first connection hole, the vertical tube is inserted into the second connection hole, and the connection through hole and the auxiliary protrusion are both located between the cross tube and the vertical tube.

10. A four-way handrail tube assembly comprising two horizontal tubes, a vertical tube and the tube connector of any one of claims 1 to 8, wherein the number of the connection holes is three, two of the connection holes are first connection holes, and the other connection hole is a second connection hole, the axes of the first connection holes are distributed transversely, the axes of the second connection holes are distributed vertically, the two first connection holes are respectively formed at both ends of the tube connector, the second connection hole is located between the two first connection holes, the second connection hole is a through hole, the two horizontal tubes are respectively inserted into the two first connection holes, and the vertical tube penetrates through the second connection hole;

or two vertical pipes, one horizontal pipe and the pipe connecting piece of any one of claims 1 to 8, wherein the number of the connecting holes is three, two of the connecting holes are first connecting holes, the other connecting hole is second connecting holes, the axes of the first connecting holes are vertically distributed, the axes of the second connecting holes are transversely distributed, the two first connecting holes are respectively formed at two ends of the pipe connecting piece, the second connecting holes are positioned between the two first connecting holes, the second connecting holes are through holes, the two vertical pipes are respectively inserted into the two first connecting holes, and the horizontal pipe penetrates through the second connecting holes.

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