CN221270858U - Pressing clamp with trapezoid teeth - Google Patents

Abstract

Pressure pincers with trapezoidal tooth can disperse the pressure of release pressure pincers to the stainless steel cover through setting up trapezoidal tooth on the pincers snap ring, is favorable to stainless steel cover evenly to warp, suppresses the production of protruding muscle: on the one hand, the closed line of the trapezoid teeth is longer, and the trapezoid teeth are provided with concave-convex structures, and have transverse lines and oblique lines, so that the stainless steel sleeve is deformed under axial stress besides radial stress, the deformation is dispersed, the stacking deformation is released, and the stainless steel sleeve is ensured to be uniformly deformed; on the other hand, conical surfaces between trapezoidal teeth corresponding to the first half clamping ring and the second half clamping ring are meshed, so that automatic correction along the axial direction of the clamp clamping ring is facilitated, and axial dislocation between the first half clamping ring and the second half clamping ring during crimping can be prevented.

Description

Pressing clamp with trapezoid teeth

Technical Field

The utility model relates to the field of water supply pipe laying tools for engineering or home decoration, in particular to a pressing clamp with trapezoidal teeth.

Background

The aluminum plastic pipe used in the construction process of the water supply pipe system is required to be butted through a joint, a stainless steel sleeve is arranged on the joint, the pipe is inserted into the joint and the stainless steel sleeve during the butt joint, and the stainless steel sleeve is pressed by a pressing clamp in a crimping manner, so that the pipe is in a joint, and the aim of pipe connection is achieved.

The existing pressing pliers are half split flat pliers clamping rings, when in crimping, the stainless steel sleeve can deform, and along with the closing of the pressing pliers, the stainless steel sleeve is pushed downwards by the whole pressing pliers, is extruded by unidirectional stress, and finally forms a convex rib, so that the attractiveness or normal use of the pipe is affected.

In view of this, the present application has been made.

Disclosure of utility model

The utility model aims to provide a pressing clamp with trapezoidal teeth, which can disperse and release the pressure of the pressing clamp on a stainless steel sleeve and is beneficial to uniform deformation of the stainless steel sleeve.

Embodiments of the present utility model are implemented as follows:

the utility model provides a pair of pressing pliers with trapezoid teeth, which comprises a pliers clamping ring, a first handle and a second handle which are connected in a rotating way through a hinge shaft, wherein the pliers clamping ring comprises a first half clamping ring and a second half clamping ring which are mutually matched to form a closed ring, and the first half clamping ring and the second half clamping ring are respectively arranged on the first handle and the second handle; trapezoidal teeth are oppositely arranged on the matching surfaces of the first half clamping ring and the second half clamping ring, the cross section shape of the trapezoidal teeth along the section where the trapezoidal teeth are positioned is trapezoidal, the trapezoidal teeth are arranged along the radial direction of the clamp clamping ring, and the trapezoidal teeth on the first half clamping ring and the second half clamping ring are meshed with each other.

In an alternative embodiment, the base angle of the trapezoid is 75-82 °.

In an alternative embodiment, the height of the trapezoidal shaped teeth is 2-3mm.

In an alternative embodiment, the trapezoidal teeth have a thickness of 5-10mm in the radial direction of the clamp ring.

In an alternative embodiment, each mating surface of the first half snap ring and the second half snap ring is provided with more than two trapezoidal teeth.

In an alternative embodiment, the first handle and the second handle are both provided with pressing pliers bodies, and the first half clamping ring and the second half clamping ring are respectively arranged on the corresponding pressing pliers bodies.

In an alternative embodiment, the pressing clamp body is provided with an arc-shaped installation part, the arc-shaped installation part is provided with a threaded through hole, the outer arc-shaped surface of the clamp ring is provided with a threaded hole, and a fastening screw sequentially penetrates through the threaded through hole to enter the threaded hole.

In an alternative embodiment, the outer arc surface of the clamp ring is provided with two arc flanges, and the two arc flanges are axially arranged on the clamp ring, and the shape and the size of the area between the two arc flanges are matched with the shape and the size of the inner surface of the arc installation part.

In an alternative embodiment, more than two clamp rings are included, each having an outer diameter that is adapted to an inner diameter of the arcuate mounting portion.

In an alternative embodiment, the material is carbon structural steel.

The embodiment of the utility model has the beneficial effects that:

According to the application, the trapezoidal teeth are arranged on the clamp ring, so that the pressure of the clamp to the stainless steel sleeve can be released in a dispersed manner, the stainless steel sleeve is uniformly deformed, and the generation of convex ribs is inhibited: on the one hand, the closed line of the trapezoid teeth is longer, and the trapezoid teeth are provided with concave-convex structures, and have transverse lines and oblique lines, so that the stainless steel sleeve is deformed under axial stress besides radial stress, the deformation is dispersed, the stacking deformation is released, and the stainless steel sleeve is ensured to be uniformly deformed; on the other hand, conical surfaces between trapezoidal teeth corresponding to the first half clamping ring and the second half clamping ring are meshed, so that automatic correction along the axial direction of the clamp clamping ring is facilitated, and axial dislocation between the first half clamping ring and the second half clamping ring during crimping can be prevented.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a press jaw having trapezoidal teeth according to an embodiment of the present utility model;

FIG. 2 is a schematic view of the clamp ring of FIG. 1;

FIG. 3 is a state diagram of the crimping tool having trapezoidal teeth of FIG. 1 crimping a tubing;

FIG. 4 is a graph of the sealing pressure of the pipe butt joint (arrow length indicates the pressure) when the pressure clamp with trapezoidal teeth in FIG. 1 is used to crimp a pipe;

FIG. 5 is a perspective view of the tubing after crimping with the crimping pliers of FIG. 1;

FIG. 6 is a cross-sectional view of the tubing after crimping with the crimping pliers of FIG. 1;

FIG. 7 is a schematic view of a flat nose pliers;

FIG. 8 is a graph of the tube-to-joint sealing pressure (arrow length indicates pressure magnitude) for the crimping pliers of FIG. 7 crimping a tube;

Fig. 9 is a projection of the tubing after crimping with the crimp pliers of fig. 7.

Icon 100-clamp ring; 110-a first half snap ring; 120-a second half snap ring; 130-trapezoidal teeth; 140-arc-shaped flanges; 200-hinge axis; 310-a first handle; 320-a second handle; 400-pressing the clamp body; 500-fastening screws; 600-convex ribs.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

First embodiment

Referring to fig. 1 and 2, the present embodiment provides a pressing clamp with trapezoidal teeth 130, including a clamp ring 100 and a first handle 310 and a second handle 320 rotatably connected by a hinge shaft 200, wherein the clamp ring 100 includes a first half ring 110 and a second half ring 120 that are mutually matched to form a closed ring, and the first half ring 110 and the second half ring 120 are respectively disposed on the first handle 310 and the second handle 320; trapezoidal teeth 130 are oppositely arranged on the matching surfaces of the first half clamping ring 110 and the second half clamping ring 120, the cross section shape of the trapezoidal teeth 130 along the section where the trapezoidal teeth are positioned is trapezoidal, the trapezoidal teeth 130 are arranged along the radial direction of the clamp clamping ring 100, and the trapezoidal teeth 130 on the first half clamping ring 110 and the second half clamping ring 120 are meshed with each other.

The pressing pliers with the trapezoid teeth 130 provided in this embodiment include a pliers snap ring 100, the pliers snap ring 100 is annular, a pipe to be pressed can pass through a through hole in the middle of the pliers snap ring 100 and is pressed by the pliers snap ring 100 when the pliers snap ring 100 is closed, specifically the pliers snap ring 100 includes a first half snap ring 110 and a second half snap ring 120 which are semi-annular, the first half snap ring 110 and the second half snap ring 120 are arranged on a first handle 310 and a second handle 320, the first half snap ring 110 and the second half snap ring 120 can rotate along with the first handle 310 and the second handle 320, when the pipe to be pressed is needed to be pressed, the handle drives the first half snap ring 110 and the second half snap ring 120 to be completely closed, after the pressing is completed, the handle drives the first half snap ring 110 and the second half snap ring 120 to be separated, and the pipe after the pressing is completed can be moved out of the pliers snap ring 100 to complete the pressing operation.

In this embodiment, trapezoidal teeth 130 are disposed on mating surfaces of the first half snap ring 110 and the second half snap ring 120, and the trapezoidal teeth 130 on the two half snap rings can be meshed with each other, the mating surfaces in this embodiment refer to surfaces of the first snap ring and the second snap ring that contact each other, the trapezoidal teeth 130 extend a certain length in a radial direction along the clamp snap ring 100, and specifically, the trapezoidal teeth 130 have a trapezoidal cross section in a tangential direction of the clamp snap ring 100, on one hand, the closed line of the trapezoidal teeth 130 is longer, and have a concave-convex structure, and have transverse lines and oblique lines, so that the stainless steel sleeve generates axial stress deformation in addition to radial stress deformation, deformation is dispersed, stacked deformation is released, and uniform deformation of the stainless steel sleeve is ensured; on the other hand, the conical surfaces of the trapezoidal teeth 130 corresponding to the first half clamping ring 110 and the second half clamping ring 120 are engaged, so that the axial correction along the axial direction of the clamp clamping ring 100 is facilitated, and the axial dislocation between the first half clamping ring 110 and the second half clamping ring 120 during the crimping process can be prevented.

In an alternative embodiment, the base angle of the trapezoid is 75-82 °, and in this embodiment, the trapezoid teeth 130 have a trapezoid cross section along the tangential direction of the clamp ring 100, specifically, the base angle of the trapezoid may be any value between 75 °, 76 °, 77 °, 78 °, 79 °, 80 °, 81 °, 82 °, or 75-82 °.

On the one hand, because the pipe to be crimped is limited, the axial width of the clamp ring 100 is not too wide, so the area of the matching surface of the trapezoidal teeth 130 can be relatively small, the bottom angle of the trapezoid is not too small, meanwhile, the bottom angle of the trapezoid is too small, the component force of the pipe to be crimped in the axial direction is too small, and the dispersing and releasing effects of the clamp on the stainless steel sleeve pressure are not obvious; on the other hand, if the bottom angle of the trapezoid is too large, for example, if the bottom angle is 90 ° at the extreme, the contact between the pipe to be crimped and the vertex angle of the trapezoid still causes the pressure concentration, and here, the bead 600 will still appear. In this embodiment, when the base angle of the trapezoid is 75-82 ° and the pipe is crimped, the surface to be crimped is subjected to radial separation and simultaneously to axial component force with proper magnitude, and the inclined plane of the trapezoid tooth 130 plays a role in transition adjustment of the stress direction, so that the occurrence of the convex rib 600 can be effectively avoided.

In alternative embodiments, the height of the trapezoidal teeth 130 is 2-3mm, and in particular may be 2mm, 2.2mm, 2.4mm, 2.6mm, 2.8mm, 3mm or any value between 2-3 mm.

In this embodiment, the height of the trapezoidal teeth 130 refers to the length along the radial direction of the clamp ring 100, and in general, if the diameter of the pipe to be crimped is larger, the height of the trapezoidal teeth 130 may be relatively larger; if the diameter of the tubing to be crimped is small, the height of the trapezoidal teeth 130 may be relatively small.

In an alternative embodiment, the thickness of the trapezoidal teeth 130 in the radial direction of the clamp ring 100 is 5-10mm, so as to ensure a certain strength and rigidity of the clamp ring, and may be specifically 5mm, 6mm, 7mm, 8mm, 9m, 10mm or any value between 5-10 mm.

The radial length of the trapezoidal teeth 130 in the clamp ring 100 depends on the thickness of the clamp ring 100, mainly the thickness of the matching position of the first half clamp ring 110 and the second half clamp ring 120, if the thickness is too small, the clamp ring 100 is not strong enough and can be easily deformed, especially the deformation possibility of the position where the trapezoidal teeth are located is higher; however, too large thickness may result in too large overall weight of the pliers, increasing cost and being inconvenient to operate, so that the thickness of the pliers clasp 100 needs to be suitable, and the length of the trapezoidal teeth 130 is adapted to the thickness of the pliers clasp 100.

In an alternative embodiment, more than two trapezoidal teeth 130 are provided on each mating surface of the first half snap ring 110 and the second half snap ring 120.

The number of the trapezoidal teeth 130 is related to the required crimping length of the pipe to be crimped, in general, the longer the crimping surface is along the axial length of the pipe, the more firmly the pipe is connected, and the larger the number of the trapezoidal teeth 130 can be accommodated, but the larger but overlong trapezoidal teeth can affect the beauty, and the contribution to the firmness of the pipe connection is not obvious, so the number of the trapezoidal teeth 130 is not too large.

In some embodiments, two trapezoidal teeth 130 may be disposed on the mating surface of the first half-collar 110, and three mating teeth may be disposed on the mating surface of the second half-collar 120; the number of trapezoidal teeth 130 in other embodiments may be set as desired.

In an alternative embodiment, the first handle 310 and the second handle 320 are both provided with a pressing clamp body 400, and the first half clamping ring 110 and the second half clamping ring 120 are respectively disposed on the corresponding pressing clamp body 400.

The pressing clamp body 400 in this embodiment facilitates the installation and fixation of the clamp ring 100, wherein the pressing clamp body 400 may be connected with the handle through a fixing structure such as a bolt, or may be integrally formed with the handle, in general, if the size of the clamp ring 100 is too large, the volume of the pressing clamp body 400 is large, and the handle is connected with the pressing clamp body 400 through a fixing structure such as a bolt; if the clamp ring 100 is smaller, the clamp body 400 is smaller, and the handle and the clamp body 400 can be integrally formed.

In an alternative embodiment, the pressing clamp body 400 is provided with an arc-shaped mounting portion, a threaded through hole is formed in the arc-shaped mounting portion, a threaded hole is formed in the outer arc-shaped surface of the clamp ring 100, and a fastening screw 500 penetrates through the threaded through hole to enter the threaded hole.

Considering that the specifications of the pipes are more, the clamp rings 100 are independently made into a component, the pipes with different specifications correspond to one set of clamp rings 100, the clamp rings 100 can be interchanged, the trapezoidal teeth 130 are arranged on the matching surfaces of the two parts of the clamp rings 100, the clamp rings 100 with proper sizes can be selected and installed on the clamp body 400 according to the specifications of the pipes to be crimped during use, the pipe joint to be crimped is placed on the jaw of the clamp rings 100, the clamp handles are operated, and the clamp rings 100 are crimped with the pipe joint, so that the pipe firm connection is realized.

In an alternative embodiment, the outer arc surface of the clamp ring 100 is provided with two arc flanges 140, and two arc flanges 140 are axially arranged along the clamp ring 100, and the shape and the size of the area between the two arc flanges 140 are matched with those of the inner surface of the arc mounting part.

A positioning groove is formed between the two arc-shaped flanges 140 and the arc-shaped surface on the outer side of the clamp ring 100, and the positioning groove is matched with the shape and the size of the inner surface of the arc-shaped mounting part, so that the clamp body 400 can conveniently position the clamp ring 100, and the clamp ring 100 is prevented from tilting.

In an alternative embodiment, more than two clamp rings 100 are included, each of the clamp rings 100 having an outer diameter that matches the inner diameter of the arcuate mounting portion.

Each clamp is provided with a clamp ring 100 with various types, and different clamp rings 100 can be installed according to the requirement of a pipeline to be crimped. Or when one clamp ring 100 is deformed or broken, the clamp ring 100 with the same type is replaced.

In an alternative embodiment, the material is carbon structural steel.

Experimental example

The pipe is crimped by the crimping pliers in the embodiment of the application, the structure of the crimping pliers is shown in the figures 1-2, the state and the pressure distribution during crimping are shown in the figures 3-4, and the shape of the pipe after crimping is shown in the figures 5-6; the pressure distribution when the flat-mouth press pliers in fig. 7 are adopted to press the pipe is shown in fig. 8, and the shape of the pipe after the press connection is completed is shown in fig. 9. As can be seen from fig. 5 and 9, the use of trapezoidal teeth 130 effectively inhibits the formation of ribs 600.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. The clamp comprises a clamp ring, a first handle and a second handle which are connected in a rotating way through a hinge shaft, wherein the clamp ring comprises a first half clamp ring and a second half clamp ring which are mutually matched to form a closed ring, and the first half clamp ring and the second half clamp ring are respectively arranged on the first handle and the second handle; it is characterized in that the method comprises the steps of,

Trapezoidal teeth are oppositely arranged on the matching surfaces of the first half clamping ring and the second half clamping ring, the cross section shape of the trapezoidal teeth along the section where the trapezoidal teeth are positioned is trapezoidal, the trapezoidal teeth are arranged along the radial direction of the clamp clamping ring, and the trapezoidal teeth on the first half clamping ring and the second half clamping ring are meshed with each other.

2. The pressing jaw with trapezoidal teeth according to claim 1, wherein the base angle of the trapezoid is 75-82 °.

3. The pressing jaw with trapezoidal teeth according to claim 1, wherein the height of the trapezoidal teeth is 2-3mm.

4. The pressing jaw with trapezoidal teeth according to claim 1, wherein the thickness of the trapezoidal teeth in the radial direction of the jaw securing ring is 5-10mm.

5. The clamp with trapezoidal teeth according to claim 1, wherein more than two trapezoidal teeth are provided on each mating surface of the first half snap ring and the second half snap ring.

6. The pressing pliers with trapezoidal teeth according to claim 1, wherein the first handle and the second handle are provided with pressing pliers bodies, and the first half clamping ring and the second half clamping ring are respectively arranged on the corresponding pressing pliers bodies.

7. The pressing jaw with trapezoidal teeth according to claim 6, wherein the pressing jaw body is provided with an arc-shaped mounting portion, the arc-shaped mounting portion is provided with a threaded through hole, the outer arc-shaped surface of the jaw clamping ring is provided with a threaded hole, and a fastening screw passes through the threaded through hole to enter the threaded hole.

8. The clamp with trapezoidal teeth according to claim 7, wherein the outer arc surface of the clamp ring is provided with two arc flanges, and the two arc flanges are axially arranged on the clamp ring, and the shape and the size of the area between the two arc flanges are matched with the shape and the size of the inner surface of the arc mounting part.

9. The clamp with trapezoidal teeth according to claim 6, comprising more than two clamp rings, each having an outer diameter that matches an inner diameter of the arcuate mounting portion.

10. The pressing jaw with trapezoidal teeth according to claim 6, wherein the material is carbon structural steel.