Telescopic positioning tube structure of tube expander

Abstract

The application discloses a telescopic positioning pipe pushing structure of a pipe expander, characterized in that the telescopic positioning pipe pushing structure comprises a rear pushing rod, a rear pushing sleeve and an elastic reset member, the rear pushing rod is in sliding fit with a sleeve hole of the rear pushing sleeve, a limiting structure for limiting the rear pushing sleeve from being separated from the rear pushing rod is arranged between the rear pushing sleeve and the rear pushing rod, and the elastic reset member is arranged on the rear pushing rod and can push and press the rear pushing sleeve, so that the rear pushing sleeve can be retracted along the rear pushing rod after contacting the side surface of the heat dissipation fin module in the last stage of pipe expansion, and the end surface of the rear pushing rod can be always in abutment with the end surface of the heat exchange pipe until the heat exchange pipe is retracted into the heat dissipation fin module after the pipe expansion is completed.

Description

TECHNICAL FIELD

[0001] The present application relates to a pipe expander, in particular to a telescopic pipe positioning structure of a pipe expander. BACKGROUND

[0002] The heat exchange pipe of a heat exchanger of a central air conditioner needs to be tightly contacted with a heat dissipation fin module through expansion so as to form a good heat exchange effect, and the above structure is generally realized by a pipe expander.

[0003] The two ends of the heat exchange pipe of a common central air conditioner are protruded from the two side surfaces of the fin module, so that the rear top rod sleeve of the pipe expander can be sleeved on the tail end of the heat exchange pipe to abut against the heat exchange pipe and move along with the heat exchange pipe during the contraction of the heat exchange pipe until the pipe expansion is completed.

[0004] However, the two ends of the heat exchange pipe of a water machine central air conditioner heat exchanger are flat with the two side surfaces of the heat dissipation fin module, and the rear top rod sleeve of the previous pipe expander cannot be telescopic. If the previous pipe expander is used, the heat exchange pipe needs to be lengthened to ensure that the rear top rod sleeve can still be sleeved on the tail end of the heat exchange pipe to abut against the heat exchange pipe in the last stage of pipe expansion, and the excess copper pipe is cut off after the pipe expansion is completed to make the two ends of the copper pipe flat with the two side surfaces of the heat dissipation fin module. Therefore, the above device not only increases the process, but also wastes materials and increases the production cost. Therefore, the applicant designs a telescopic pipe positioning structure of a pipe expander for the water machine central air conditioner heat exchanger to solve the above problems. SUMMARY

[0005] In order to overcome the shortcomings of the prior art, the present application provides a telescopic pipe positioning structure of a pipe expander.

[0006] The technical scheme adopted by the present application to solve its technical problems is:

[0007] The telescopic pipe positioning structure of the pipe expander comprises a rear top rod, a rear top sleeve and an elastic reset member, the rear top rod is in sliding fit with the sleeve hole of the rear top sleeve, a limiting structure is arranged between the rear top sleeve and the rear top rod to limit the rear top sleeve from being pulled out of the rear top rod, the elastic reset member is arranged on the rear top rod and can push and press the rear top sleeve, the rear top rod comprises a rod one and a rod two, the rod one is in sliding fit with the sleeve hole of the rear top sleeve, and an empty hole is arranged on the end face of the rod one.

[0008] The empty hole is a tapered hole.

[0009] The rod head limiting structure comprises a step surface arranged on the rod one and a convex ring arranged in the sleeve hole, the convex ring can abut against the step surface, the rod one comprises a rod head and a rod body, and the step surface is formed by the end face where the rod head and the rod body intersect.

[0010] The elastic reset member is a compression spring, the second rod is provided with a connecting screw hole, the first rod is provided with a connecting screw thread matched with the connecting screw hole, one end of the compression spring is abutted with the end face of the second rod, and the other end of the compression spring is abutted with the rear top sleeve.

[0011] The first rod and the second rod are both provided with through holes, the second rod is connected with the oil pipe adapter, and the through holes are communicated with the inner hole of the oil pipe adapter.

[0012] The beneficial effects of the present application are that the top pipe structure comprises a rear top rod, a rear top sleeve and an elastic reset member, the rear top rod is in sliding fit with the sleeve hole of the rear top sleeve, a limiting structure limiting the rear top sleeve from being pulled out of the rear top rod is arranged between the rear top sleeve and the rear top rod, the elastic reset member is arranged on the rear top rod and can push and press the rear top sleeve, so that when the rear top sleeve contacts the side surface of the heat dissipation fin module in the last stage of pipe expansion, the rear top sleeve can be retracted along the rear top rod, so that the end face of the rear top rod can always abut against the end face of the heat exchange pipe until the heat exchange pipe is retracted into the heat dissipation fin module after the pipe expansion is completed, the heat exchanger produced by the above structure does not need to cut the heat exchange pipe, not only reduces the process, but also saves materials, thereby reducing the production cost. BRIEF DESCRIPTION OF DRAWINGS

[0013] The present application will be further described below in combination with the drawings and examples.

[0014] Fig. 1 is the structure view of the present application when the pipe expansion is just started;

[0015] Fig. 2 is the cross-sectional structure view of the present application;

[0016] Fig. 3 is the structure view of the present application after the pipe expansion is completed. DETAILED DESCRIPTION

[0017] The advantages and features of the present disclosure and the method of implementing the same will be clarified by the following embodiments described with reference to the drawings. However, the present disclosure can be embodied in different forms and should not be interpreted as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art. Furthermore, the present disclosure is limited only by the scope of the claims.

[0018] The shapes, sizes, proportions, angles, and numbers disclosed in the accompanying drawings for describing embodiments of the present disclosure are merely examples, and thus the present disclosure is not limited to the shown details. Throughout the present specification, the same reference numerals refer to the same elements. In the following description, detailed descriptions of functions or configurations that are deemed to unnecessarily obscure the gist of the present disclosure will be omitted when the relevant known functions or configurations are determined to be unnecessary. In the case where “include,” “have,” and “comprise” are used in the present specification, other components can be added unless “only” is used. Unless indicated to the contrary, singular forms can include plural forms.

[0019] In explaining elements, although not explicitly described, the elements are understood to include an error range.

[0020] In describing positional relationships, for example, when the positional relationship is described as “on,” “above,” “below,” and “adjacent to,” one or more parts can be disposed between two other parts unless “immediately” or “directly” is used.

[0021] In describing temporal relationships, for example, when the temporal order is described as “after,” “subsequently,” “next,” and “before,” discontinuous cases can be included unless “immediately” or “directly” is used.

[0022] It should be understood that although the terms “first,” “second,” and the like can be used herein to describe various elements, the elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element without departing from the scope of the present disclosure.

[0023] As a person of ordinary skill in the art can fully understand, the features of different embodiments of the present disclosure can be partially or wholly coupled or combined with each other, and can be cooperated with each other in various ways and technically driven. Embodiments of the present disclosure can be executed independently of each other or can be executed together in a mutually dependent relationship.

[0024] Reference Figs. 1 to 3The application discloses a telescopic positioning pipe pushing structure of a pipe expander, which comprises a rear pushing rod 1, a rear pushing sleeve 2 and an elastic reset part 3, the rear pushing rod 1 is in sliding fit with the sleeve hole of the rear pushing sleeve 2, a limiting structure is arranged between the rear pushing sleeve 2 and the rear pushing rod 1, and the limiting structure limits the rear pushing sleeve 2 from being separated from the rear pushing rod 1, the elastic reset part 3 is arranged on the rear pushing rod 1 and can push the rear pushing sleeve 2, through the above structure, in the last stage of pipe expansion, the rear pushing sleeve 2 can be retracted along the rear pushing rod 1 after contacting the side surface of a heat dissipation fin module 4, so that the end surface of the rear pushing rod 1 can always abut against the end surface of a heat exchange pipe 5 until the heat exchange pipe 5 is retracted into the heat dissipation fin module 4 after the pipe expansion is completed.

[0025] In the application, the rear pushing rod 1 comprises a rod one 6 and a rod two 7 for the convenience of manufacturing and assembling, the rod one 6 is in sliding fit with the sleeve hole of the rear pushing sleeve 2, so that when the rear pushing sleeve 2 is sleeved on the end of the heat exchange pipe 5, the end surface of the rod one 6 abuts against and pushes the end surface of the heat exchange pipe 5, as a further structure, the end surface of the rod one 6 is provided with a clearance hole 8 which is a taper hole, the end of the expansion rod which passes through the other end needs space for accommodation after the pipe expansion is completed, so the clearance hole 8 is needed, and the taper hole can match the taper of the end of the expansion rod.

[0026] As shown in the drawings, the rod head limiting structure comprises a step surface arranged on the rod one 6 and a convex ring 9 arranged in the sleeve hole, the convex ring 9 can abut against the step surface, the rod one 6 comprises a rod head and a rod body, and the step surface is formed by the end surface of the intersection of the rod head and the rod body, of course, the diameter of the rod head is larger than that of the rod body, when the elastic reset part 3 pushes the rear pushing sleeve 2, the rear pushing sleeve 2 will not be separated from the rod one 6 through the limitation of the step surface.

[0027] As shown in the drawings, the elastic reset part 3 is a compression spring, the rod two 7 is provided with a connecting screw hole, the rod one 6 is provided with a connecting screw thread matched with the connecting screw hole, because the diameter of the rod two 7 is larger than that of the rod one 6, so the end edge part of the rod two 7 can be higher than the outer surface of the rod one 6, so that one end of the compression spring abuts against the end surface of the rod two 7, and the other end of the compression spring abuts against the rear pushing sleeve 2, and the compression spring is a conventional component, which is easy to purchase and low in cost, so that the rear pushing sleeve 2 can be reset through the pushing of the compression spring after being retracted.

[0028] As shown in the drawings, the rod one 6 and the rod two 7 are both provided with through holes 10, the rod two 7 is connected with an oil pipe adapter 11, and the through holes 10 are communicated with the inner holes of the oil pipe adapter 11, the oil pipe adapter 11 is connected with an oil pump in the outside world, so that lubricating oil can be pumped into the heat exchange pipe 5 through the through holes 10 during the pipe expansion, so as to lubricate the expansion rod.

[0029] The structure of the telescopic positioning pipe of the pipe expander provided by the embodiment of the present application is described in detail. The principle and implementation mode of the present application are described by using specific examples. The above description of the embodiments is only used to help understand the method of the present application and its core idea. Meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation mode and application range will be changed. In summary, the content of the specification should not be understood as a limitation of the present application.

Claims

1. An expandable positioning top tube structure of a tube expander, characterized in that: The application relates to a rear top rod, a rear top sleeve and an elastic reset piece, the rear top rod and the sleeve hole of the rear top sleeve are in sliding fit, a limiting structure for limiting the rear top sleeve from being separated from the rear top rod is arranged between the rear top sleeve and the rear top rod, the elastic reset piece is arranged on the rear top rod and can push and press the rear top sleeve, the rear top rod comprises a rod one and a rod two, the rod one and the sleeve hole of the rear top sleeve are in sliding fit, the end surface of the rod one is provided with a clearance hole, the elastic reset piece is a compression spring, the rod two is provided with a connecting screw hole, the rod one is provided with a connecting screw thread matched with the connecting screw hole, one end of the compression spring is in abutment with the end surface of the rod two, and the other end of the compression spring is in abutment with the rear top sleeve, the rod one and the rod two are both provided with through holes, the rod two is connected with an oil pipe adapter, and the through holes are communicated with the inner holes of the oil pipe adapter.

2. The telescopic positioning tube structure of a tube expander according to claim 1, characterized in that: The clearance hole is a taper hole.

3. The telescopic positioning tube structure of the tube expander according to claim 1, characterized in that: The limiting structure comprises a step surface arranged on the rod one and a convex ring arranged in the sleeve hole, the convex ring can be in abutment with the step surface, the rod one comprises a rod head and a rod body, and the step surface is formed by the end surface where the rod head and the rod body intersect.

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