Anti-pulling connecting piece

Abstract

The utility model provides an anti-pulling connecting piece which comprises a sleeve, an expansion piece and an elastic ring, the elastic ring is arranged on the expansion piece in a sleeved mode, the expansion piece is installed in the sleeve, a breaking portion is arranged on the elastic ring, an open groove is formed in the middle of one side of the breaking portion, and a guide piece extending into the open groove is arranged in the middle of the other side of the breaking portion. A first lightening hole is formed in the guide piece, a first elastic piece bent outwards in an arc shape towards the side close to the open groove is arranged on the side, back on to the open groove, of the first lightening hole, and the outer end of the first elastic piece makes elastic contact with the inner wall of the sleeve so as to prevent the elastic ring from being disengaged from the sleeve. According to the utility model, an elastic gap is formed in the circumferential direction of the elastic ring to provide a deformation space for insertion of the plug-in, the elastic ring is provided with the elastic sheet which is bent outwards, the elastic ring is positioned and installed, the elastic ring is in friction contact with the sleeve, an elastic space is formed in the radial direction of the elastic ring, the elastic ring is prevented from being separated from the sleeve, and the plug-in is effectively prevented from being pulled out through double elasticity.

Description

TECHNICAL FIELD

[0001] The utility model relates to a pipe pile connecting piece technical field, concretely relates to a uplift connecting piece. BACKGROUND

[0002] In the construction industry, in order to improve construction efficiency, prefabricated pipe piles are usually used to build, and in the use process of pipe piles, different lengths of pipe piles need to be selected according to different requirements, which requires two pipe piles to be connected, and the traditional connection method includes welding, flange connection and connection by using a connecting piece, wherein the welding method has the problems of difficult cleaning of welds, easy occurrence of virtual welding and missing welding, therefore, the connecting piece is a commonly used connection method for connecting pipe piles.

[0003] However, the existing connecting piece usually includes an expansion piece, and the expansion piece is limited and clamped by a C-shaped elastic hoop, but when the expansion piece is forced to expand, the C-shaped elastic hoop may be detached from the sleeve, and the traditional method is to install a positioning piece between the C-shaped elastic hoop and the sleeve, but because the radial space distance between the C-shaped elastic hoop and the sleeve is small, it is difficult to bend and process the positioning piece into V-shaped, W-shaped or Z-shaped in the small space, and the forming is difficult.

[0004] Therefore, the present application is developed based on the above problems. CONTENT OF THE UTILITY MODEL

[0005] The utility model discloses a simple structure, few parts of uplift connecting piece, its elastic ring circumferential direction forms the deformation space of elastic ring, provides the deformation space of insert piece insertion, and the elastic ring is positioned and installed on the outward bending elastic sheet of elastic ring, and the sleeve is in friction contact, and the radial direction of elastic ring forms the elastic space of elastic ring, prevents the elastic ring from being detached from the sleeve, and double elastic force prevents the insert piece from being pulled out.

[0006] The utility model discloses a scheme that technical problems are solved: a uplift connecting piece, including sleeve, expansion piece and elastic ring, the elastic ring is set up on expansion piece, expansion piece installs in the sleeve, be equipped with the breakaway of elastic ring, the middle part of breakaway one side is equipped with the opening slot, the middle part of breakaway other side is equipped with the guide piece that extends to the opening slot, be equipped with first lightening hole on the guide piece, first lightening hole one side is equipped with the first elastic sheet that arc outward bends towards the side close to the opening slot of first lightening hole, the outer end of first elastic sheet and sleeve inner wall elastic contact to prevent the elastic ring from being detached from the sleeve, still be equipped with a plurality of second lightening hole on the elastic ring, first lightening hole and second lightening hole are distributed on the elastic ring, be equipped with second elastic sheet in second lightening hole, second elastic sheet and first elastic sheet are set up to prevent the elastic ring from being detached from the sleeve with first elastic sheet cooperation positioning installation elastic ring.

[0007] Further, in order to provide elastic deformation effect and form friction structure between the first elastic sheet, the second elastic sheet and the sleeve, effectively prevent the elastic ring from being pulled out of the sleeve, and prevent the plug from being pulled out, the first elastic sheet and the second elastic sheet each include an elastic arc segment and a friction arc segment arranged in sequence from inside to outside, the included angle between the elastic arc segment and the elastic ring is between 30°-60°, and the included angle between the friction arc segment and the elastic ring is between 0°-30°.

[0008] Further, in order to reduce weight, position and install the elastic ring, and form elastic deformation and anti-pulling structure, the elastic ring is formed by punching the first weight-reducing hole and the second weight-reducing hole, the waste material produced by punching the first weight-reducing hole and the second weight-reducing hole is integrally connected to one end of the elastic ring, the waste material produced by punching the first weight-reducing hole and the second weight-reducing hole is bent to form the first elastic sheet and the second elastic sheet, the first elastic sheet is adapted to the shape of the first weight-reducing hole, and the second weight-reducing hole is adapted to the shape of the second elastic sheet.

[0009] Further, in order to ensure that the expansion piece can be expanded under stress, tightly engage the plug, and prevent the plug from being pulled out of the expansion piece, the expansion piece is a cylinder composed of a plurality of disconnected arc-shaped pieces, the inner wall of the expansion piece is uniformly provided with sawteeth for increasing the friction of the plug, and the outer wall of the expansion piece is provided with an annular clamping groove for installing the elastic piece.

[0010] Further, in order to facilitate the installation of the elastic piece and the plug, one end of the expansion piece is a large end, the other end of the expansion piece is a small end, the diameter of the large end is larger than the diameter of the small end, the outer side of the end of the small end is provided with an outer wedge-shaped chamfer for facilitating the clamping of the elastic ring into the annular clamping groove, and the inner side of the end of the large end is provided with an inner wedge-shaped chamfer for facilitating the insertion of the plug.

[0011] Compared with the prior art, the present invention has the following advantages: the present invention provides a disconnecting portion on the elastic ring, so that the elastic ring has elastic space in the circumferential direction, and an open groove is provided in the middle of one side of the disconnecting portion, and a guide piece extending into the open groove is provided in the middle of the other side of the disconnecting portion. On the one hand, it ensures that the guide piece has elastic space in the circumferential direction, that is, the elastic ring can be squeezed and expanded outward when the plug-in is inserted, and at the same time, the guide piece covers the disconnecting portion, always keeping the expansion piece tight, so that the force applied by the elastic ring to the expansion piece remains uniform. On the other hand, the first elastic piece provided on the guide piece provides the guide piece with elastic space in the radial direction at the same time, that is, when the guide piece is expanded outward by external force when the plug-in is inserted, the first elastic piece on the guide piece contacts the inner wall of the sleeve, and then The guide piece is applied with an inward force, so that the guide piece forms a double elastic force in the circumferential and radial directions at the disconnection point of the elastic ring, thereby ensuring the clamping force of the disconnection part on the expansion piece, and further keeping the elastic ring tight on the plug-in. Compared with the traditional elastic ring which only has a circumferential elastic force at the disconnection point, the utility model has a better use effect. In addition, in order to cooperate with the first spring piece, the utility model also arranges a plurality of second spring pieces on the elastic ring. The cooperation of the first spring piece and the second spring piece can not only achieve the purpose of positioning and installing the expansion piece, but also, when the plug-in is inserted into the expansion piece to stretch the elastic ring and squeeze the first spring piece and the second spring piece toward the inner wall of the sleeve, friction will be generated between the first spring piece and the second spring piece and the inner wall of the sleeve, preventing the elastic ring from falling out of the sleeve, thereby realizing the anti-pullout and anti-slip function, simple structure and good use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0013] Figure 1 It is a structural diagram of the utility model;

[0014] Figure 2 This is an exploded view of the structure of the present utility model;

[0015] Figure 3 It is a top view of the structure of the elastic ring and the expansion member;

[0016] Figure 4 Schematic diagram of the structure of the elastic ring.

[0017] In the figure: sleeve 1; expansion member 2; annular groove 21; outer wedge-shaped chamfer 22; inner wedge-shaped chamfer 23; elastic ring 3; disconnection portion 31; opening groove 32; guide piece 33; first lightening hole 34; first spring piece 35; second lightening hole 36; second spring piece 37. DETAILED DESCRIPTION

[0018] The following is a detailed description of the present invention in conjunction with the accompanying drawings and specific embodiments:

[0019] Example: Figures 1-4 As shown, this embodiment provides an anti-pullout connector, including a sleeve 1, an expansion member 2 and an elastic ring 3, wherein the elastic ring 3 is sleeved on the expansion member 2, and the expansion member 2 is installed in the sleeve 1, and the elastic ring 3 is provided with a disconnection portion 31, and an opening groove 32 is provided in the middle of one side of the disconnection portion 31, and a guide piece 33 extending into the opening groove 32 is provided in the middle of the other side of the disconnection portion 31, and a first weight-reducing hole 34 is provided on the guide piece 33, and the first weight-reducing hole 34 is provided with a side facing away from the opening groove 32. A first elastic piece 35 is curved outward on one side of the slot 32, and the outer end of the first elastic piece 35 is in elastic contact with the inner wall of the sleeve 1 to prevent the elastic ring 3 from falling out of the sleeve 1. The elastic ring 3 is also provided with a plurality of second weight-reducing holes 36. The first weight-reducing holes 34 and the second weight-reducing holes 36 are evenly distributed on the elastic ring 3. A second elastic piece 37 is provided in the second weight-reducing hole 36. The second elastic piece 37 is arranged in the same direction as the first elastic piece 35 so as to cooperate with the first elastic piece 35 to position and install the elastic ring 3 while preventing the elastic ring 3 from falling out of the sleeve 1.

[0020] In this embodiment, in order to provide an elastic effect and form a friction structure between the first elastic piece 35, the second elastic piece 37 and the sleeve 1, thereby effectively preventing the elastic ring 3 from falling out of the sleeve 1 and preventing the plug-in from being pulled out; the first elastic piece 35 and the second elastic piece 37 both include an elastic arc segment and a friction arc segment arranged sequentially from the inside to the outside, and the angle between the elastic arc segment and the elastic ring 3 is between 30° and 60°, and the angle between the friction arc segment and the elastic ring 3 is between 0° and 30°.

[0021] In this embodiment, in order to reduce weight, position and install the elastic ring 3, and at the same time form an elastic anti-slip structure; the elastic ring 3 is formed by punching out a first weight-reducing hole 34 and a second weight-reducing hole 36, and one end of the waste generated by punching out the first weight-reducing hole 34 and the second weight-reducing hole 36 is integrally connected to the elastic ring 3, and the other end of the waste generated by punching out the first weight-reducing hole 34 and the second weight-reducing hole 36 is bent to form a first spring piece 35 and a second spring piece 37, and the first spring piece 35 is adapted to the shape of the first weight-reducing hole 34, and the second weight-reducing hole 36 is adapted to the shape of the second spring piece 37.

[0022] In this embodiment, in order to ensure that the expansion member 2 can expand under force and can firmly bite the plug-in to prevent the plug-in from being pulled out of the expansion member 2; the expansion member 2 is a cylinder composed of a number of disconnected arc-shaped sheets, and the inner wall of the expansion member 2 is evenly distributed with serrations for increasing the friction of the plug-in, and the outer wall of the expansion member 2 is provided with an annular groove 21 for installing an elastic member.

[0023] In this embodiment, in order to facilitate the installation of elastic parts and plug-ins; one end of the expansion part 2 is a large end, and the other end of the expansion part 2 is a small end. The diameter of the large end is larger than the diameter of the small end. The outer side of the small end is provided with an outer wedge-shaped chamfer 22 for facilitating the elastic ring 3 to be snapped into the annular groove 21, and the inner side of the large end is provided with an inner wedge-shaped chamfer 23 for facilitating the insertion of the plug-in. At the same time, the inner wedge-shaped chamfer 23 also facilitates the expansion part 2 to be installed into the sleeve 1.

[0024] The utility model provides a disconnect portion 31 on the elastic ring 3 so that the elastic ring 3 has an elastic space in the circumferential direction, and an open groove 32 is provided in the middle of one side of the disconnect portion 31, and a guide piece 33 extending into the open groove 32 is provided in the middle of the other side of the disconnect portion 31. On the one hand, it is guaranteed that the guide piece 33 has an elastic space in the circumferential direction, that is, the elastic ring 3 can be squeezed and expanded outward when the plug is inserted. At the same time, the guide piece 33 covers the disconnect portion 31, always keeping the expansion member 2 tight, so that the force applied by the elastic ring 3 to the expansion member 2 remains uniform. On the other hand, the first elastic piece 35 provided on the guide piece 33 enables the guide piece 33 to have an elastic space in the radial direction at the same time, that is, when the guide piece 33 is expanded outward by external force when the plug is inserted, the first elastic piece 35 on the guide piece 33 contacts the inner wall of the sleeve 1, and in turn exerts pressure on the guide piece 33 The inward force is applied, so that the guide piece 33 forms a double elastic force in the circumferential and radial directions at the disconnection point of the elastic ring 3, ensuring the clamping force of the disconnection part 31 on the expansion piece 2, and further keeping the elastic ring 3 tight on the plug-in. Compared with the traditional elastic ring 3 which only has a circumferential elastic force at the disconnection point, the utility model has a better use effect. In addition, in order to cooperate with the first elastic piece 35, the utility model also provides multiple second elastic pieces 37 on the elastic ring 3. The cooperation of the first elastic piece 35 and the second elastic piece 37 can not only achieve the purpose of positioning and installing the expansion piece 2, but also, when the plug-in is inserted into the expansion piece 2 to stretch the elastic ring 3, and the first elastic piece 35 and the second elastic piece 37 are squeezed toward the inner wall of the sleeve 1, friction will be generated between the first elastic piece 35 and the second elastic piece 37 and the inner wall of the sleeve 1, preventing the elastic ring 3 from falling out of the sleeve 1, thereby realizing the anti-pullout and anti-slip function, simple structure and good use effect.

[0025] The above description is merely an embodiment of the present invention and does not limit the scope of patent protection of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the scope of patent protection of the present invention.

Claims

1. A pull-out resistant connector, characterized in that: The cam is secured to the cam face and is adapted to engage said spring, wherein the cam is secured to the cam face with a plurality of springs which are adapted to engage said springs and engage said springs.

2. The pull-out resistant connector according to claim 1, characterized in that: The first elastic piece and the second elastic piece both include an elastic arc segment and a friction arc segment arranged sequentially from the inside to the outside, the angle between the elastic arc segment and the elastic ring is between 30°-60°, and the angle between the friction arc segment and the elastic ring is between 0°-30°.

3. The pull-out resistant connector according to claim 1, characterized in that: The elastic ring is formed into a first weight-reducing hole and a second weight-reducing hole by punching. One end of the waste material produced by punching the first weight-reducing hole and the second weight-reducing hole is integrally connected to the elastic ring. The other end of the waste material produced by punching the first weight-reducing hole and the second weight-reducing hole is bent to form a first spring sheet and a second spring sheet. The first spring sheet is adapted to the shape of the first weight-reducing hole, and the second weight-reducing hole is adapted to the shape of the second spring sheet.

4. The pull-out resistant connector according to claim 1, characterized in that: The expansion piece is a cylinder formed by a plurality of broken arc-shaped sheets. The inner wall of the expansion piece is uniformly distributed with saw teeth for increasing the friction of the plug-in. The outer wall of the expansion piece is provided with an annular groove for installing the elastic piece.

5. The pull-out resistant connector according to claim 1, characterized in that: One end of the expansion piece is a large end, and the other end of the expansion piece is a small end. The diameter of the large end is larger than the diameter of the small end. The outer side of the small end is provided with an outer wedge-shaped chamfer to facilitate the elastic ring to be clamped into the annular groove, and the inner side of the large end is provided with an inner wedge-shaped chamfer to facilitate the insertion of the plug-in.

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