Clamping and pressing mechanism for connecting tool

Abstract

The utility model belongs to the technical field of pipeline connecting tools, and particularly relates to a clamping and pressing mechanism for a connecting tool. Comprising a pair of calipers, a pair of calipers arms and a compression ring die, the compression ring die is detachably installed on the calipers, the compression ring die comprises a fixed die and a movable die set, the two movable dies are arranged on the two sides of the fixed die, and a compression joint hole for a compression joint target to penetrate through is defined between the fixed die and the movable die set. A spherical groove is formed in one end, far away from the fixed mold, of the movable mold; and spherical matching parts matched with the spherical groove are arranged on the pair of clamp arms. According to the utility model, the spherical groove is arranged on the movable die, so that the calipers and the annular pressing die can rotate, namely, the angle between the calipers and a crimping target can be adjusted to form more angles so as to adapt to different working environments.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipe connection tools, and particularly relates to a crimping mechanism for a connection tool. Background Art

[0002] Pipe connection tools are mainly used to press two pipes together for connection. For example, an electric crimping tool disclosed in the applicant's prior patent application CN116810725A includes a working mechanism and a driving mechanism. The working mechanism includes a crimping head for acting on a target crimping object. A crimping die for clamping the outside of the target crimping object (such as a pipe) is provided on the crimping head. Under the action of the driving mechanism, the crimping ends of the crimping head gradually come together, thereby crimping the target crimping object.

[0003] Although the above-mentioned crimping tool can realize the crimping of pipes, since the crimping head is directly provided on the driving mechanism, its application scenarios have certain limitations. Specifically, when this kind of crimping tool is working, the body part of the driving mechanism is vertically arranged with the pipe, so it is only suitable for open spaces. If the pipes are arranged in some relatively narrow or complex areas, such as narrow pipe wells, or pipe networks on the top of buildings, and in occasions such as pipe maintenance and connection, this kind of crimping tool is not suitable for use. Summary of the Invention

[0004] To solve the above problems, the utility model provides a crimping mechanism for a connection tool that can rotate and adjust the crimping angle between the calipers and the crimping target according to the actual working scenario to be applicable to a variety of different pipe crimping scenarios.

[0005] The utility model adopts the following technical solutions:

[0006] The utility model provides a crimping mechanism for a connection tool, which has the following characteristics: it is used to be clamped on a crimping target to crimp the crimping target, including calipers with a pair of clamping arms, and a crimping ring die that is detachably installed on the calipers and has: a fixed die, a moving die group containing two moving dies arranged on both sides of the fixed die. A crimping hole for the crimping target to pass through is formed by enclosing between the fixed die and the moving die group. Wherein, a spherical groove is opened at one end of the moving die far away from the fixed die, and spherical mating parts that cooperate with the spherical groove are provided on the pair of clamping arms.

[0007] In the crimping mechanism for a connection tool provided by the utility model, it also has the following characteristics: an avoidance groove and convex parts located on both sides of the avoidance groove are provided at the edge of the spherical groove. The bottom of the avoidance groove is an inclined arc surface. A second avoidance groove for avoiding the convex parts is opened on one side of the spherical mating part. An avoidance groove is also provided at the edge of the spherical groove on the opposite side of the avoidance groove.

[0008] In the crimping mechanism for a connecting tool proposed by the present utility model, there is also such a feature that the moving die includes: a moving die pressing seat, one end of which is rotatably connected to the fixed die, the other end of which is provided with the spherical groove, and an arc-shaped guiding sliding groove is provided on the side facing the crimping hole; a moving die pressing flap, which is movably arranged on the moving die pressing seat, and is formed with an arc-shaped guiding slider that cooperates with the arc-shaped guiding sliding groove, and a limiting notch is arranged along the arc direction on the arc-shaped guiding slider; a blocking member, which is inserted into one end of the moving die pressing seat away from the fixed die and penetrates through the arc-shaped guiding sliding groove along the axial direction for blocking one end of the arc-shaped guiding slider; a limiting member, which is inserted into the moving die pressing seat and penetrates through the limiting notch along the axial direction; an elastic member, which is installed in the limiting notch; and a first steel ball, one end of which abuts against the elastic member and the other end of which abuts against the limiting member; wherein, the arc length of the arc-shaped guiding slider is less than the arc length of the arc-shaped guiding sliding groove.

[0009] In the crimping mechanism for a connecting tool proposed by the present utility model, there is also such a feature that inspection marking lines are correspondingly arranged on the moving die pressing seat and the moving die pressing flap; a limiting groove is formed by the bottom of the arc-shaped guiding sliding groove protruding towards one side, and a limiting convex edge that is embedded into the limiting groove is formed by the outer end of the arc-shaped guiding slider protruding towards one side.

[0010] In the crimping mechanism for a connecting tool proposed by the present utility model, there is also such a feature that the fixed die includes an integrally arranged fixed die pressing seat and a fixed die pressing flap, a notch is provided at one end of the moving die pressing flap close to the fixed die pressing flap, and a sewage storage groove is formed between the notch and the end of the fixed die pressing flap.

[0011] In the crimping mechanism for a connecting tool proposed by the present utility model, there is also such a feature that one moving die pressing seat is rotatably connected to each of the two ends of the fixed die pressing seat, and an installation hole is provided on the side of the moving die pressing seat facing the fixed die pressing seat, and an auxiliary mold closing structure is arranged in the installation hole.

[0012] In the crimping mechanism for a connecting tool proposed by the present utility model, there is also such a feature that a pair of inserting plates are respectively formed at the two ends of the fixed die pressing seat, a pair of slots for the inserting plates to be inserted are respectively provided on the side of the moving die pressing seats at the two ends of the fixed die pressing seat facing the fixed die pressing seat, the auxiliary mold closing structure is installed in one of the slots, and the auxiliary mold closing structures at the two ends of the fixed die pressing seat are arranged staggeredly.

[0013] In the crimping mechanism for a connecting tool proposed by the present utility model, there is also such a feature that the auxiliary mold closing structure has: a ejector rod spring, one end of which extends into the installation hole, an ejector rod, which is nested at the other end of the ejector rod spring and has a head protruding radially from the ejector rod spring, and the head is used for abutting against the fixed die pressing seat.

[0014] In the crimping mechanism for a connecting tool proposed by the present utility model, there is also such a feature that a limiting component is further provided at the rotating end of the movable die pressing seat and the fixed die pressing seat. The limiting component has: a cylindrical positioning pin inserted on the inserting plates at both ends of the fixed die pressing seat; a limiting inserting plate formed between the pair of inserting slots of the fixed die pressing seat, and a limiting protrusion cooperating with the cylindrical positioning pin is provided at the outer end.

[0015] In the crimping mechanism for a connecting tool proposed by the present utility model, there is also such a feature that a spherical mounting groove and an inclined mounting groove are respectively formed on the opposite sides of the middle parts of the pair of pliers arms. A second steel ball is arranged between the two relatively arranged spherical mounting grooves, and a spring is arranged between the two relatively arranged inclined mounting grooves.

[0016] Functions and effects of the utility model

[0017] According to the crimping mechanism for a connecting tool of the present utility model, there is a fixed die and a movable die, and a crimping hole for a crimping target to pass through is formed by enclosing between the fixed die and the movable die. A spherical groove is formed on the movable die, and a spherical mating part cooperating with the spherical groove is provided on the pliers arm of the clamp, so that the clamp and the ring crimping die adopt a spherical contact fit when connected. During work, rotation can be carried out between the clamp and the ring crimping die, that is, the angle between the clamp and the crimping target can be adjusted to form more angles to adapt to different working environments. Description of the drawings

[0018] Figure 1 is one of the state diagrams when the connecting tool crimps the crimping target in the embodiment of the present utility model.

[0019] Figure 2 is the second state diagram when the connecting tool crimps the crimping target in the embodiment of the present utility model.

[0020] Figure 3 is the state diagram when the ring crimping die and the clamp cooperate in the embodiment of the present utility model.

[0021] Figure 4 is the structural diagram of the clamp in the embodiment of the present utility model.

[0022] Figure 5 is the structural diagram of the clamp after hiding the front connecting plate in the embodiment of the present utility model.

[0023] Figure 6 is the partial structural exploded view of the clamp in the embodiment of the present utility model.

[0024] Figure 7 is the side view when the clamp is installed on the mounting seat of the driving part in the embodiment of the present utility model.

[0025] Figure 8 It is the front view when the caliper is installed on the mounting seat of the driving part in the embodiment of the present utility model.

[0026] Figure 9 It is the structural schematic diagram of the ring pressing die in the embodiment of the present utility model.

[0027] Figure 10 It is the side view of the ring pressing die in the embodiment of the present utility model.

[0028] Figure 11 It is Figure 10 the sectional view taken along the line A-A in

[0029] Figure 12 It is Figure 10 the sectional view taken along the line B-B in

[0030] Figure 13 It is Figure 12 the sectional view taken along the line C-C in

[0031] Figure 14 It is the exploded view of the connection structure between the fixed die and the movable die of the ring pressing die in the embodiment of the present utility model.

[0032] Reference numerals:

[0033] Pressing target 1;

[0034] Driving part 2; Main body 21; Mounting seat 23; Connecting piece 24;

[0035] Caliper 3; Left caliper arm 31; Right caliper arm 32; Front connecting plate 33; Mounting hole 331; Rear connecting plate 34; Left connecting pin 35; Right connecting pin 36; Spherical mating part 37; Convex edge part 371; Second clearance groove 372; Second steel ball 38; Spring 39;

[0036] Ring pressing die 5; Fixed die 51; Fixed die pressing seat 511; Fixed die pressing flap 512; Insert plate 513; Movable die 52; Movable die pressing seat 521; Arc-shaped guiding chute 5211; Limiting groove 5212; Mounting hole 5213; Movable die pressing flap 522; Arc-shaped guiding slider 5221; Limiting notch 5222; Notch 5224; Blocking piece 523; Limiting piece 524; Elastic piece 525; First steel ball 526; Insert slot 527; Pressing hole 53; Spherical groove 54; First clearance groove 541; Convex part 542; Avoidance groove 543; Inspection marking line 55; Dirt storage groove 56; Ejector rod spring 571; Ejector rod 572; Positioning pin 591; Limiting projection 592. Detailed implementation manners

[0037] In order to make the technical means, creative features, achieved purposes and effects realized by the present utility model easy to understand, the following specifically describes the crimping mechanism for connecting tools of the present utility model in conjunction with embodiments and drawings.

[0038] It should be noted that the structures, proportions, sizes, etc. shown in the accompanying drawings of the embodiments of this specification are only used to cooperate with the content disclosed in the specification for those skilled in this technology to understand and read, and are not used to limit the limiting conditions under which the present invention can be implemented. Therefore, they do not have substantial technical significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present invention.

[0039] At the same time, the terms such as "upper end", "lower end", "front", and "rear" cited in the embodiments of this specification are also only for the convenience of clear narration, rather than used to limit the scope under which the present invention can be implemented. The change or adjustment of their relative relationship, without substantial change in the technical content, should also be regarded as the scope under which the present invention can be implemented.

[0040] It should also be noted that when an element is referred to as being "fixed to", "disposed on", or "connected to" another element, it can be directly on the other element or there may be an intermediate element present at the same time.

[0041] In addition, the descriptions involving "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features.

[0042] <Embodiment>

[0043] As Figures 1-3 shown, this embodiment provides a connecting tool for crimping a crimping target 1 (such as a circular pipe). The connecting tool includes a driving part 2 and a crimping mechanism. Among them, the crimping mechanism includes a caliper 3 and a ring crimping die 5. The caliper 3 is installed on the driving part 2 and performs opening and closing operations under the drive of the driving part 2. The ring crimping die 5 is detachably installed with the caliper 3.

[0044] When the ring crimping die 5 is connected to the caliper 3, a spherical connection structure is adopted, that is, a spherical groove is provided on the ring crimping die 5, and a spherical mating part is provided on the caliper 3 that mates with the spherical groove, so that the caliper 3 and the ring crimping die 5 can rotate. As Figure 2 shown, the relative positions between the caliper 3 and the ring crimping die 5 can be rotated from Figure 1 the parallel position of Figure 2 to the almost perpendicular position of

[0045] As Figure 3 and Figure 4As shown in the figure, the caliper 3 includes a pair of jaw arms (left jaw arm 31 and right jaw arm 32), a pair of connecting plates (front connecting plate 33 and rear connecting plate 34), and a pair of connecting pins (left connecting pin 35 and right connecting pin 36). The left jaw arm 31 and the right jaw arm 32 are symmetrically arranged, and both have a working end for cooperating with the ring pressing die 5 and a driving end for cooperating with the driving part 2. Spherical mating parts 37 are arranged at relative positions on the working end (in this embodiment, the spherical mating part 37 is a hemispherical protrusion integrally formed on the working end) for mating with the spherical grooves on the ring pressing die 5. The front connecting plate 33 and the rear connecting plate 34 are respectively placed on the front and rear sides of the pair of jaw arms to connect the middle parts of the pair of jaw arms together. Through holes are provided in the middle parts of the left jaw arm 31 and the right jaw arm 32, and a pair of through holes are also respectively provided at corresponding positions on the front connecting plate 33 and the rear connecting plate 34. The left connecting pin 35 and the right connecting pin 36 sequentially pass through the through holes on the front connecting plate 33, the left jaw arm 31 (right jaw arm 32), and the rear connecting plate 34 to connect the front connecting plate 33, the rear connecting plate 34, the left jaw arm 31, and the right jaw arm 32 together. At the same time, circlips for preventing axial movement are provided on both the front and rear sides of the left connecting pin 35 and the right connecting pin 36. The left jaw arm 31 and the right jaw arm 32 can also rotate relative to the front connecting plate 33 and the rear connecting plate 34 respectively with the left connecting pin 35 and the right connecting pin 36 as axes.

[0046] As Figure 2 shown in the figure, the driving part 2 includes a main body 21, a pair of rollers 22 respectively acting on the left jaw arm 31 and the right jaw arm 32, and a mounting seat 23. A driving mechanism is arranged in the main body 21, and the mounting seat 23 is installed at the front end of the main body 21. As Figure 7 shown in the figure, a "one"-shaped mounting groove 231 is provided in the middle of the mounting seat 23. The pair of rollers 22 are movably arranged in the mounting seat 23 and can move under the drive of the driving mechanism in the main body 21. Mounting holes 331 and 341 are provided on the front connecting plate 33 and the rear connecting plate 34 of the caliper 3. The caliper 3 is detachably installed in the "one"-shaped mounting groove 231 through a connecting member 24 passing through the mounting holes 331 and 341. The pair of rollers 22 respectively act on the inner sides of the driving ends of the left jaw arm 31 and the right jaw arm 32. Driven by the driving mechanism, the pair of rollers 22 can cause the driving ends of the two jaw arms to separate from each other, so that the working ends approach each other, driving the ring pressing die 5 to press the pressing target 1.

[0047] As Figure 6 shown in the figure, spherical mounting grooves 322 and inclined mounting grooves 323 are respectively provided on the opposite sides of the middle parts of the left jaw arm 31 and the right jaw arm 32. A second steel ball 38 is arranged between the two oppositely arranged spherical mounting grooves 322, and a spring 39 is arranged between the two oppositely arranged inclined mounting grooves 323. The arrangement of the second steel ball 38 can ensure that the left jaw arm 31 and the right jaw arm 32 remain synchronized when opening and closing, and the force is more evenly distributed. The spring 39 can assist the left jaw arm 31 and the right jaw arm 32 to open and close.

[0048] The movement state of the caliper 3 is as follows: when the user squeezes from the outside of the force application ends at the tails of the left caliper arm 31 and the right caliper arm 32 with the hand, the driving ends of the left caliper arm 31 and the right caliper arm 32 approach each other to form a closed state, and the working ends of the two gradually separate; when the driving part 2 pushes outwards from the inside of the driving ends at the tails of the left caliper arm 31 and the right caliper arm 32 to form a separated state, the working ends of the two gradually approach each other.

[0049] As Figures 4-6 shown, the outer sides of the driving ends of the left caliper arm 31 and the right caliper arm 32 protrude outwards to respectively form a left force application part 311 and a right force application part 321. When the driving ends are in the closed state, as Figure 8 shown, both the left force application part 311 and the right force application part 321 protrude out of the outer periphery of the mounting seat 23. When installing the caliper 3, the user generally directly holds the left force application part 311 and the right force application part 321 with the fingers, presses the driving ends inwards to form a closed state, and setting the left force application part 311 and the right force application part 321 to protrude out of the mounting seat 23 can prevent the user's fingers from following the driving ends and extending into the "-" shaped mounting groove 231, protecting the user's hand and preventing the hand from being stuck or injured due to accidental activation.

[0050] The ring pressing die 5 is a multi-petal type ring die, which has a fixed die 51 and at least one moving die group. Each moving die group contains two moving dies 52 symmetrically arranged on both sides of the fixed die 51. A pressing hole 53 for the pressing target 1 to pass through is formed by enclosing between the fixed die and the moving die group. In this embodiment, mainly one group of moving die groups is taken as an example for detailed description. As Figures 9-14 shown, the two moving dies 52 are respectively placed on the left and right sides of the fixed die 51, and a pressing hole 53 for the pressing target 1 to pass through is formed by enclosing between the two moving dies 52 and the fixed die 51. Spherical grooves 54 are formed at the ends of the two moving dies 52 far away from the fixed die 51 for cooperating with the spherical mating part 37 on the caliper 3. In actual situations, there can also be two groups or even more groups of moving die groups. Each group of moving die groups is connected end to end. The first group of moving die groups at the beginning is connected to the fixed die 51, and the spherical grooves 54 are formed on the last group of moving die groups.

[0051] The spherical groove 54 cooperates with the spherical mating part 37 of the caliper 3, and a first clearance groove 541 is provided at the edge of the spherical groove 54 and convex parts 542 are located on both sides of the first clearance groove 541. As Figures 10-13 shown, a convex edge part 371 that slightly protrudes from the spherical mating part 37 is provided beside the spherical mating part 37. At the same time, corresponding to the convex parts 542, a second clearance groove 372 for avoiding the convex parts 542 is formed on the inner side (towards the caliper 3 main body side) of the spherical mating part 37. Specifically, as Figure 9As shown, the bottom of the first avoidance groove 541 is inclined and gradually lowered from the direction of the spherical groove 54 toward the side, which can increase the contact area with the side of the spherical matching part 37. The convex part 542 is higher than the bottom of the first avoidance groove 541, which can ensure the stability of the spherical matching part 37 in the rotation of the spherical groove 54 and avoid falling out of the spherical groove 54 during the rotation. The side of the edge of the spherical groove 54 close to the main part of the movable mold 52 is also concave to form an avoidance groove 543, which is arranged opposite to the first avoidance groove 541 and is used to avoid the convex edge part 371 on the outside of the spherical matching part 37. When the spherical matching part 37 is matched with the spherical groove 54, the spherical matching part 37 can rotate smoothly.

[0052] The movable mold 52 includes a movable mold pressing seat 521, a movable mold pressing flap 522, a blocking member 523, a limiting member 524, an elastic member 525 and a first steel ball 526. The movable mold pressing flap 522 is movably arranged on the side of the movable mold pressing seat 521 facing the crimping hole 53. Specifically, the movable mold pressing seat 521 is in an arc shape as a whole, one end of which is rotatably connected to the fixed mold 51, and the other end is provided with a spherical groove 54, and the inner side (the side facing the crimping hole 53) is provided with an arc-shaped guide groove 5211. The side of the movable mold pressing flap 522 facing the movable mold pressing seat 521 is protrudingly formed with an arc-shaped guide slider 5221 that matches the arc-shaped guide groove 5211. The arc-shaped guide slider 5221 is inserted in the arc-shaped guide groove 5211 and can slide along the arc-shaped guide groove 5211.

[0053] The arc length of the arc-shaped guide slider 5221 is smaller than the arc length of the arc-shaped guide groove 5211, so that a vacant position is formed between the lower part of the arc-shaped guide groove 5211 and the lower end of the arc-shaped guide slider 5221, and the blocking member 523 is inserted at the end of the movable mold pressing seat 521 away from the fixed mold 51, and the blocking member 523 is arranged axially through the arc-shaped guide groove 5211, that is, the blocking member 523 is located in the vacant position, and is used to block one end of the arc-shaped guide slider 5221 to prevent the arc-shaped guide slider 5221 from falling out during the sliding process.

[0054] The arc-shaped guiding slider 5221 is also provided with a limiting notch 5222 along the arc direction. The elastic member 525 is a spring, and the spring and the first steel ball 526 are arranged in the limiting notch 5222. The limiting member 523 is inserted into the moving die pressing seat 521 and axially penetrates through the limiting notch 5222. One end of the first steel ball 526 abuts against the elastic member 525, and the other end abuts against the limiting member 524 under the elastic action of the elastic member 525. Wherein, both the limiting member 524 and the blocking member 523 are cylindrical pins. On the one hand, their settings can limit the up and down sliding of the moving die pressing flap 522. On the other hand, during disassembly, only by successively removing the limiting member 524 and the blocking member 523, the moving die pressing flap 522 and the moving die pressing seat 521 can be disassembled, which is very convenient and fast. In addition, the limiting member 524 and the blocking member 523 can also finely adjust the position of the moving die pressing flap 522 to make it reach the best crimping state.

[0055] The moving die pressing seat 521 and the moving die pressing flap 522 are also provided with corresponding inspection markings 55. When the inspection markings 55 on the moving die pressing seat 521 and the moving die pressing flap 522 are aligned with each other, it is the initial position. If during long-term use, the inspection markings 55 on the moving die pressing seat 521 and the moving die pressing flap 522 deviate (for example, dust and impurities accumulate between the moving die pressing flap 522 and the moving die pressing seat 521, resulting in the deviation of their positions), it can prompt the user that there is a deviation at this position, which will affect the crimping effect. At this time, the limiting member 524 and the blocking member 523 can be disassembled, and then the moving die pressing flap 522 can be disassembled for cleaning and then reassembled until the inspection markings 55 on the moving die pressing seat 521 and the moving die pressing flap 522 are adjusted to the aligned position. The inspection markings 55 are convenient for users to judge whether the moving die can be used normally.

[0056] As Figure 13 As shown, the bottom of the arc-shaped guiding chute 5211 protrudes to one side to form a limiting groove 5212, and the outer end of the arc-shaped guiding slider 5221 protrudes to one side to form a limiting convex edge 5223 that is embedded in the limiting groove 5212, so that the connection between the arc-shaped guiding chute 5211 and the arc-shaped guiding slider 5221 forms a mutually buckled form, strengthening the connection stability. In addition, this mutually buckled form can also make the arc-shaped guiding chute 5211 a shallow groove, without the need to be opened too deep, reducing the processing difficulty while making the structure lightweight.

[0057] As Figure 11As shown in the figure, the fixed mold 51 includes a fixed mold pressing seat 511 and a fixed mold pressing flap 512 which are integrally arranged. One movable mold pressing seat 521 is rotatably connected to each end of the fixed mold pressing seat 511. An installation hole 5213 is formed on the side of the movable mold pressing seat 521 facing the fixed mold pressing seat 511. An auxiliary mold closing structure is provided in the installation hole. The auxiliary mold closing structure has a ejector rod spring 571 and an ejector rod 572. One end of the ejector rod spring 571 extends into the installation hole 5213, and the other end is sleeved on the ejector rod 572. The ejector rod 572 is nested at the other end of the ejector rod spring 571 and has a top head that protrudes radially from the ejector rod spring 571. The top head abuts against the fixed mold pressing seat.

[0058] As Figures 9-14 shown, a pair of inserting plates 513 are respectively formed at both ends of the fixed mold pressing seat 511. A pair of slots 527 for inserting the inserting plates 513 are respectively formed on the side of the movable mold pressing seats 521 located at both ends of the fixed mold pressing seat 511 facing the fixed mold pressing seat 511. The auxiliary mold closing structure is installed in one of the slots 513, and the auxiliary mold closing structures located at both ends of the fixed mold pressing seat 511 are arranged staggeredly. Specifically, as Figure 14 shown, a pair of inserting plates 513 are arranged vertically and have a gap in the middle. Correspondingly, three inserting plates are formed on the side of the movable mold pressing seat 521 facing the fixed mold pressing seat 511. Two slots 527 are formed between the three inserting plates. The middle inserting plate on the movable mold pressing seat 521 is inserted into the gap between the pair of inserting plates 513 of the fixed mold pressing seat 511. The pair of inserting plates 513 are respectively inserted into the two slots 527, and then the fixed mold pressing seat 511 and the movable mold pressing seat 521 are connected by passing a cylindrical hinge pin 58 through the five inserting plates in sequence. Circlips for restricting the radial movement of the cylindrical hinge pin 58 are respectively provided at both ends of the cylindrical hinge pin 58.

[0059] The movable mold pressing seat 521 can rotate relative to the fixed mold pressing seat 511 with the cylindrical hinge pin 58 as the axis. A limiting component 59 for restricting the rotation angle of the movable mold pressing seat 521 is further provided at the rotating end of the fixed mold pressing seat 511 and the movable mold pressing seat 521. As Figure 12 shown, the limiting component includes a cylindrical positioning pin 591 inserted on the inserting plates 513 at both ends of the fixed mold pressing seat 511, and a limiting inserting plate 528 formed between a pair of slots 527 of the movable mold pressing seat 521. A limiting protrusion 592 matched with the cylindrical positioning pin 591 is provided at the outer end of the limiting inserting plate. An arc-shaped edge that can be attached to the circumferential surface of the cylindrical positioning pin 591 is formed on the side of the limiting protrusion 592 facing the cylindrical positioning pin 591.

[0060] The fixed die pressing flap 512 and the movable die pressing flaps 522 located on both sides thereof are combined to form a die flap that contacts and presses the pressing target 1. In the initial state, as shown in the figure, there is a gap between the fixed die pressing flap 512 and the movable die pressing flaps 522 located on both sides thereof. After the ring pressing die 5 is subjected to the force of the caliper 3, the lower ends of the two movable die pressing flaps 522 close, and will gradually move toward the side where the fixed die pressing flap 512 is located, so that the gap gradually closes. When the fixed die pressing flap 512 abuts against the movable die pressing flaps 522 located on both sides thereof, and the bottoms of the two movable die pressing flaps 522 also abut against each other, the pressing process can be completed.

[0061] Notches 5224 are provided at one ends of the two movable die pressing flaps 522 close to the fixed die pressing flap 512. A dirt storage groove 56 is formed between the notches 5224 and the end of the fixed die pressing flap 512. Even when the position where the movable die pressing flap 522 abuts against the fixed die pressing flap 512 is reached, the dirt storage groove 56 still exists. Since the working scenario of pipe pressing is usually at the construction site, the pipe is prone to be contaminated with dust and impurities. During the pressing process, the dust and impurities on the pipe can enter the dirt storage groove 56 along the edge of the pressing hole 53, and then fall off during the opening process of the movable die 52 after the subsequent pressing is completed, so as to prevent the dust and impurities from accumulating in the pressing hole 53 and affecting the pipe pressing effect.

[0062] Working principle of the ring pressing die in this embodiment:

[0063] Open the ring pressing die 5 and clamp it on the outer periphery of the pressing target 1. Install the caliper 3 on the mounting seat 23 at the front end of the main body 21, and then fit the spherical mating part 37 on the caliper 3 to the spherical grooves 54 on the two movable dies of the ring pressing die 5. Start the driving part 2, and the roller 22 acts on the two clamping arms of the caliper 3, prompting the front ends of the two clamping arms to gradually approach. Under the action of the clamping arms, the two movable dies also gradually approach, and the movable die pressing flaps 522 gradually move toward the fixed die pressing flap 512 until the lower ends of the two movable die pressing flaps 522 abut against each other and the upper ends respectively abut against the fixed die pressing flap 512, completing the pressing of the pressing target 1.

[0064] Among them, when the caliper 3 is fitted to the ring pressing die 5, since the spherical mating between the two can be adjusted according to the actual working environment, so as to adapt to different application scenarios.

[0065] Functions and effects of the embodiment:

[0066] The crimping mechanism and the connecting tool for the connecting tool according to the above embodiments. Since the moving die of the ring crimping die 5 is provided with a spherical groove, and the caliper 3 has a spherical mating portion 37 that cooperates with the spherical groove, the caliper 3 and the ring crimping die 5 adopt a spherical contact fit when connected. During operation, the caliper 3 and the ring crimping die 5 can rotate relative to each other, forming more angles, realizing "universal crimping", so as to adapt to different working environments, especially in some relatively narrow construction environments such as pipe wells and wall holes.

[0067] Furthermore, the ring crimping die 5 of the above embodiments is a ring die structure composed of three or more die petals, and the moving die adopts a guiding slideway design, with a spring return device arranged in the middle to ensure uniform shrinkage of the die petals during the crimping process and good centering of the pipe fittings after being crimped.

[0068] Furthermore, a first clearance groove 541 is provided at the edge of the spherical groove 54, and convex portions 542 are arranged on both sides of the first clearance groove 541. A second clearance groove for avoiding the convex portions 542 is opened on one side of the spherical mating portion 37, so that the caliper 3 and the ring crimping die 5 will not interfere with each other during the connection process, solving the interference problem during crimping at any angle, making the connection and rotation smoother, and at the same time ensuring the strength of the snap-in ball socket and achieving the purpose of structural lightweight.

[0069] Furthermore, a pin hinge design is adopted between the fixed die 51 and the moving die 52 of the ring die, and a limiting component is also arranged at the connection between the two, which can limit the excessive rotation angle of the two moving die petals 522 to prevent unilateral extrusion of the two moving die petals 522 when the wall thickness of the pipe fitting is uneven, resulting in poor crimping effect.

[0070] Furthermore, a dirt storage groove is provided on the ring crimping die 5, which can reduce the risk of mud and sand at the construction site and prevent the shrinkable heat-shrinkable film from being squeezed and unable to close the die.

[0071] Furthermore, the ring crimping die 5 adopts a lightweight multi-petal ring die structure design, and the lightweight design of the shallow arc-shaped guiding slide groove on the moving die seat 521 is convenient for processing. In addition, using a shallow guide slideway to guide both ends is more compact.

[0072] Furthermore, there are inspection markings on the ring crimping die 5 in the non-crimping state, which is convenient for users to check whether the die petals are flexible in the initial state before construction operations.

[0073] Furthermore, the ring crimping die 5 has a snap-in anti-slip design to avoid falling off from the pipe fitting and causing injury. For example, the ring crimping die 5 is designed with an auxiliary die closing structure formed by a push rod spring and a push rod, and combined with the above-mentioned limiting component. When the ring crimping die 5 is snapped onto the crimping target 1 or after the crimping is completed, under the action of this auxiliary die closing structure and the limiting component, the ring die can be prevented from falling off from the pipe fitting, so as not to cause harm to the user.

[0074] The above embodiments are only used to illustrate the specific implementation manners of the present utility model, and the present utility model is not limited to the description scope of the above embodiments.

Claims

1. Pressing mechanism for connection tool, characterized in that, For clamping on a crimping target to crimp the crimping target, including: A caliper having a pair of clamping arms, A crimping ring die detachably mounted on the caliper and having: A fixed die, A movable die module containing two movable dies disposed on both sides of the fixed die, A crimping hole is formed between the fixed die and the movable die module for the crimping target to pass through, Wherein, a spherical groove is formed at one end of the movable die away from the fixed die, and a spherical mating portion cooperating with the spherical groove is provided on the pair of clamping arms.

2. The caulking mechanism for a connection tool according to claim 1, wherein, A first clearance groove and convex portions located on both sides of the first clearance groove are provided at the edge of the spherical groove, a second clearance groove for avoiding the convex portions is formed on one side of the spherical mating portion, and a relief groove is further provided at the edge of the spherical groove on the opposite side of the first clearance groove.

3. The crimping mechanism for a connection tool according to claim 1, characterized in that, The movable die includes: A movable die pressing seat rotatably connected to the fixed die at one end, having the spherical groove at the other end, and an arc-shaped guiding sliding groove formed on the side facing the crimping hole; A movable die pressing flap movably disposed on the movable die pressing seat, formed with an arc-shaped guiding sliding block cooperating with the arc-shaped guiding sliding groove, and a limiting notch is further provided along the arc direction on the arc-shaped guiding sliding block; A blocking member inserted into one end of the movable die pressing seat away from the fixed die and axially penetrating through the arc-shaped guiding sliding groove for blocking one end of the arc-shaped guiding sliding block; A limiting member inserted into the movable die pressing seat and axially penetrating through the limiting notch; An elastic member installed in the limiting notch; and A first steel ball having one end abutted against the elastic member and the other end abutted against the limiting member; Wherein, the arc length of the arc-shaped guiding sliding block is less than the arc length of the arc-shaped guiding sliding groove.

4. The caulking mechanism for a connection tool according to claim 3, wherein Inspection marking lines are correspondingly provided on the movable die pressing seat and the movable die pressing flap; a limiting groove is formed by the bottom of the arc-shaped guiding sliding groove protruding to one side, and a limiting convex edge inserted into the limiting groove is formed by the outer end of the arc-shaped guiding sliding block protruding to one side.

5. The caulking mechanism for a connection tool according to claim 4, wherein, The fixed die includes an integrally provided fixed die pressing seat and a fixed die pressing flap, a notch is provided at one end of the movable die pressing flap close to the fixed die pressing flap, and a dirt storage groove is formed between the notch and the end of the fixed die pressing flap.

6. The crimping mechanism for a connection tool according to claim 5, characterized in that, The movable die pressing seats are respectively rotatably connected to both ends of the fixed die pressing seat, and an installation hole is formed on one side of the movable die pressing seat facing the fixed die pressing seat, and an auxiliary mold closing structure is provided in the installation hole.

7. The caulking mechanism for a connection tool according to claim 6, characterized in that, A pair of insertion plates are respectively formed at both ends of the fixed die pressing seat, a pair of slots for the insertion plates to be inserted are respectively formed on one side of the movable die pressing seats at both ends of the fixed die pressing seat facing the fixed die pressing seat, the auxiliary mold closing structure is installed in one of the slots, and the auxiliary mold closing structures at both ends of the fixed die pressing seat are arranged staggeredly.

8. The caulking mechanism for a connection tool according to claim 6 or 7, characterized in that, The auxiliary mold closing structure has: A push rod spring with one end extending into the installation hole, A push rod nested at the other end of the push rod spring and having a push head protruding radially from the push rod spring for abutting against the fixed die pressing seat.

9. The caulking mechanism for a connecting tool according to claim 7, wherein, A limiting component is further provided at the rotating end of the movable die pressing seat and the fixed die pressing seat, and the limiting component has: A cylindrical positioning pin inserted into the insertion plates at both ends of the fixed die pressing seat, The limiting insertion plate is formed between the pair of slots of the moving die pressing seat, and a limiting protrusion cooperating with the cylindrical positioning pin is provided at the outer end.

10. The crimping mechanism for a connection tool according to any one of claims 1-7, characterized in that, A spherical mounting groove and an inclined mounting groove are respectively formed on the opposite sides of the middle parts of the pair of pliers arms, a second steel ball is arranged between the two oppositely arranged spherical mounting grooves, and a spring is arranged between the two oppositely arranged inclined mounting grooves.

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