CN218361684U - Eccentric mechanism and pipe expander - Google Patents

Abstract

The utility model discloses an eccentric mechanism and electric tube expander, it belongs to electric tube expander technical field, the utility model discloses a purpose is realized like this: the switch component is used for controlling the opening and closing of the plunger device; a power drive member for powering the plunger arrangement; wherein, power drive component includes: an eccentric member partially located in the first return conduit, the push rod for pushing oil in; a driving power source for providing rotational kinetic energy to the eccentric member. In the product, the crank reciprocates back and forth to extrude the oil in the oil bag to the thimble at the front end, so that the thimble moves forwards to control the opening and closing of the pipe orifice.

Description

Eccentric mechanism and pipe expander

Technical Field

The invention belongs to the technical field of pipe expanders, and particularly relates to an eccentric mechanism and a pipe expander.

Background

The tube expander is a expanding tool for expanding the inner and outer diameters of tubes to make the contact part between tube and tube plate tightly jointed and bear certain pressure. When the pipe expansion is carried out on the pipe with small diameter, the pipe expander can only be manually used, the use is very strenuous, and if the manual strength is insufficient, the pipe expansion effect cannot reach the standard.

The Chinese patent discloses a hydraulic pipe expander, the application number is 201820850018.4, the pipe expander is provided with an oil hydraulic pump, a connecting sleeve is butted on a hydraulic cylinder cavity of the oil hydraulic pump, a piston is connected in the connecting sleeve in a sliding manner, the inner side end of the piston is communicated with the hydraulic cylinder cavity, the other end of the connecting sleeve opposite to the hydraulic cylinder cavity is connected with a pipe expanding body assembly, an pipe expanding seat assembly used for fixing a pipe fitting is clamped in the pipe expanding body assembly, a port of the pipe fitting faces the connecting sleeve and extends into a corresponding pipe expanding body assembly cavity on the inner side of the pipe expanding assembly, and an pipe expanding joint which can extend into the pipe expanding body assembly and is coaxially inserted into the port of the pipe fitting is arranged at the outer side end of the piston. The device drives through the oil hydraulic pump, and this oil hydraulic pump adopts the handle drive, in-service use, still needs the manual work to push the handle hard and just can carry out the expand tube operation, uses still very hard.

In the existing market, an oil bag of the pipe expander is usually mounted on the rear end or the outer side wall of the pipe expander, so that the pipe expander needs to increase the length or the thickness of the rear end or the side wall, the structure of the pipe expander is large, and the use or the placement of the pipe expander is troublesome.

Disclosure of Invention

The invention aims to provide a pipe expander with a simple structure.

The purpose of the invention is realized as follows:

an eccentric mechanism for driving a push rod of a plunger device to move, comprising at least:

the switch component is used for controlling the opening and closing of the plunger device;

a power drive member for powering the plunger arrangement;

wherein, power drive component includes:

an eccentric member partially located in the first return conduit, the push rod for pushing oil in;

a driving power source for providing rotational kinetic energy to the eccentric member.

Preferably, the eccentric member has:

and one end of the first eccentric wheel is connected with a driving power source, and the first eccentric wheel is used for transmitting the kinetic energy of the driving power source.

A second eccentric wheel which is arranged opposite to the first eccentric wheel;

the first eccentric wheel and the second eccentric wheel are provided with eccentric holes, and the eccentric holes of the first eccentric wheel and the eccentric holes of the second eccentric wheel are arranged oppositely;

and the bolt is positioned between the first eccentric wheel and the second eccentric wheel, and the first eccentric wheel and the second eccentric wheel are respectively sleeved at two ends of the bolt.

Preferably, the eccentric member has:

the bearings are sleeved on the first eccentric wheel and the second eccentric wheel respectively and used for consuming the first eccentric wheel and the second eccentric wheel.

Preferably, the rear end of the push rod is provided with a connecting ring in a key groove shape;

the connecting ring is sleeved on the plug pin and is used for driving the push rod to move back and forth.

Preferably, also include:

a planetary gear is adopted between the eccentric component and the driving power source for increasing the rotation efficiency.

Preferably, a plunger device for flaring the tubular; it has a thimble component and a flaring component;

the two ends of the hydraulic device are matched with the plunger device and the power device;

a power plant comprising a driving power source, a speed reduction mechanism and an eccentric mechanism as described above.

Preferably, wherein the hydraulic device has:

an oil tank for storing liquid;

a delivery conduit in communication with the tank, the power drive member being partially located within the delivery conduit;

a push chamber for driving the ejector pin member; the ejector pin component is partially positioned in the conveying pipeline and used for pushing the ejector pin component to move back and forth;

preferably, the hydraulic device has:

and a return conduit communicating with the push chamber and the tank, respectively, and the opening and closing member being at least partially located in the return conduit.

Preferably, the return duct has:

a first return conduit in communication with the push chamber;

the two ends of the second return pipeline are respectively communicated with the first return pipeline and the oil tank, and the second return pipeline is used for communicating and conveying liquid from the pushing chamber into the oil tank;

preferably, the second return conduit has:

a communicating section for the switching member to move back and forth;

and the pushing section is communicated with the first return pipeline and is used for providing a space for supplying oil to push the ejector rod.

Compared with the prior art, the invention has the outstanding and beneficial technical effects that:

1. in this product, the oil pocket is located oil circuit device rear end and staggered connection, and current electric tube expander is used for placing the oil pocket in order to put the oil pocket, can prolong the rear end of electric tube expander, compares in this product, has saved the volume of product greatly.

2. In this product, the oil pocket can be dismantled with oil circuit device and be connected for when refueling for the oil pocket, tear out the oil pocket alone, add oil in the oil pocket, its simple structure and easy dismounting, and make things convenient for the long-time operation of machine can produce the convenient clearance of dirt.

3. In the product, the crank reciprocates back and forth to extrude the oil in the oil bag to the thimble at the front end, so that the thimble moves forwards to control the opening and closing of the pipe orifice.

When the thimble opens and closes the pipe orifice to the maximum position, oil flows into the pressure release valve through the pipeline, pushes the push rod in the pressure release valve, and enables the oil to flow back into the oil bag from the pipeline in the pressure release valve.

4. In this product, when the push rod outwards moved to the assigned position, the push rod can trigger the shutdown switch for the motor stall.

Drawings

Fig. 1 is a schematic structural diagram of the patent.

Fig. 2 is a schematic view of the internal structure of the patent.

Fig. 3 is a cross-sectional view of the present patent.

Fig. 4 is an enlarged view of fig. 3 at a.

Fig. 5 is a schematic structural diagram of the pipeline in the patent.

Fig. 6 is an exploded view of the interior of the patent.

Fig. 7 is a schematic structural diagram of the power device of the patent.

Reference numerals are as follows:

1-a plunger device; 2-a power plant; 3-a hydraulic device; 11-a thimble member; 12-a flaring member; 21-a switch member; 22-a power drive member; 31-an oil tank; 32-a delivery conduit; 33-a push chamber; 34-a return line; 111-ejector pins; 112-a plunger member; 113-a fixation sleeve; 114-an elastic member; 121-a spring;

211-a top rod; 221-a push rod; 222-a knee lever member; 223-a power source;

321-a one-way valve; 341-first return conduit; 342-a second return conduit;

1112-an abutment end; 1121-abutting grooves; 1131-an extension end; 2221-a bearing; 2222-first eccentric wheel; 2223-second eccentric wheel; 2224-bolt; 2225-eccentric hole; 3421-communicating section; 3422-push section.

Detailed Description

The invention is further described below with reference to specific examples:

1-4, an eccentric mechanism and a tube expander, a tool for flaring a tubular; it has a plunger device 1, a power device 2 and a hydraulic device 3. The plunger device 1 has a thimble member 11 and a flare member 12; the power unit 2 has a switch member 21 and a power drive member 22; the hydraulic device 3 has an oil tank 31, a delivery pipe 32, a push chamber 33, and a return pipe 34; the oil bags 31 are positioned at the rear end of the hydraulic device 3 and are connected in a staggered manner, the rear end of the existing pipe expander can be prolonged to be used for placing the oil bags 31 in order to add the oil bags 31, and compared with the product, the volume of the product is greatly saved; moreover, the oil bag 31 is detachably connected, so that when the oil bag 31 is filled with oil, the oil bag 31 is detached independently, the oil is added into the oil bag 31, the structure is simple, the oil bag is convenient to detach, and the machine can conveniently clean dirt generated during long-time operation.

Also, in the present embodiment, the tube expander is pushed forward by the ejector pin member 11, the front end of the ejector pin member 11 is fitted into the flare member 12, and the outer diameter of the ejector pin member 11 causes the flare member 12 to expand outward. Thereby causing the outer diameter of the flaring member 12 to increase.

As shown in fig. 4-5, the hydraulic device 3 delivers oil from the oil bag 31 to the pushing chamber 33 through the delivery pipe 32 by the power device 2, so that the oil pushes the needle member 11 to move outward by the oil pressure, wherein the delivery pipe 32 has a check valve 321, so that the oil does not flow back into the oil bag 31 after the power device 2 stops operating after the oil is delivered out of the delivery pipe 32 by the power device 2.

The return pipe 34 is connected to the push chamber 33, and the oil flows into the return pipe 34 after passing through the push chamber 33, wherein the return pipe 34 has a first return pipe 341 and a second return pipe 342. In the embodiment, the first return conduit 341 communicates the second return conduit 342 and the pushing chamber 33, in the first return conduit 341, the switch member 21 is partially located in the first return conduit 341, when the oil enters the first return conduit 341, the oil pressure drives the switch member 21 located in the first return conduit 341 to move outward, and in practical use, after the switch member 21 moves outward to a certain distance, the power driving member 22 is controlled to stop working, wherein the first return conduit 341 includes a communicating section 3421 and a pushing section 3422, and two ends of the pushing section 3422 communicate with the pushing chamber 33 and the second return conduit 342 respectively.

In practical use, when the oil pushes the push rod 211 of the switch member 21 to disengage to the communicating section 3422, so that the nozzle of the second return pipe 342, which was previously plugged by the push rod 211, is exposed, the oil can flow into the second return pipe 342 through the pushing section 3422, and the other end of the second return pipe 342 communicates with the oil bladder 31; the whole oil way is closed and can be circulated, and the design is better for reducing the cost.

As shown in fig. 3 and 4, the plunger device 1 further has a thimble member 11 and a flaring member 12, the thimble member 11 drives the flaring member 12 to flare outwards, so that the outer wall of the flaring member 12 is continuously enlarged, thereby achieving the effect of flaring the pipe fitting, wherein the thimble member 11 has a thimble 111, a plunger piece 112 and a fixing sleeve 113;

as shown in fig. 4, one end of the thimble 111 has an abutting end 1112; the outer diameter of the abutting end 1112 is larger than the outer wall of the thimble 111 so that the abutting end 1112 has a larger contact surface; the plunger piece 112 has an abutting groove 1121 at one end, and the abutting end 1112 can be embedded into the abutting groove 1121 and mutually abutted against the abutting groove 1121; in the present embodiment, the outer wall of the plunger member 112 abuts against the inner wall of the pushing chamber 33, when the liquid is delivered to the pushing chamber 33, the liquid pushes the plunger member 112 to move outwards, so that the plunger member 112 drives the thimble 111, so that one end of the thimble 111 pushes the flaring member 12 to expand outwards;

moreover, the fixed sleeve 113 is sleeved on the thimble 111, and one end of the fixed sleeve 113 is abutted with the plunger 112 and the abutting end 1112; the holster 113 also has an extended end 1131 that extends outwardly along the outer wall of the holster 113; the two sides of the extending end 1131 respectively abut against the spring 121 and the plunger 112 arranged at one end of the flaring member 12, wherein the spring 121 is located between the fixing sleeve 113 and the flaring member 12, and has elastic deformation because the spring 121 is an elastic member; when the plunger member 112 drives the thimble 111 to move towards the flaring member 12, the fixing sleeve 113 located outside the thimble 111 also moves towards the flaring member 12 along with the thimble 111, so that the distance between the flaring member 12 and the fixing sleeve 113 is gradually reduced, and the spring 121 is contracted inwards; after the liquid flows back to the oil tank 31, the spring 121 is contracted inwards due to the fact that the fixing sleeve does not exert external force, so that the spring 121 rebounds outwards to push the fixing sleeve 113 to move in the opposite direction; since one end of the retaining sleeve 113 abuts the plunger member 112 and the abutment end 1112; so that the fixing sleeve 113 also pushes the plunger member 112 and the thimble 111 to move; the recovery action of the pipe expander is realized; moreover, the fixing sleeve 113, the plunger piece 112 and the thimble 111 are abutted against each other but are not connected; the replacement is more convenient when the accessories are disassembled or replaced at the later stage; and the parts have simple structures and are convenient to install.

As shown in fig. 2 and 3, the power unit 2 has a switch member 21 and a power drive member 22, wherein the power drive member 22 has a crank member 222, a push rod 221 and a power source 223. The crank member 222 has, among other things, a first eccentric 2222, a second eccentric 2223, a cross-pin 2224 and a bearing 2221.

In this embodiment, one end of the first eccentric 2222 is connected to the driving power source 223, and the first eccentric 2222 is used for transmitting the kinetic energy of the driving power source 223; the second eccentric 2223 is disposed opposite to the first eccentric 2222; the first eccentric 2222 and the second eccentric 2223 each have an eccentric hole 2225, and the eccentric holes 2225 of the first eccentric 2222 are disposed opposite to the eccentric holes 2225 of the second eccentric 2223;

the plug pin 2224 is located between the first eccentric wheel 2222 and the second eccentric wheel 2223, and the first eccentric wheel 2222 and the second eccentric wheel 2223 are respectively sleeved at two ends of the plug pin 2224;

the bearings 2221 are sleeved at the upper ends of the first eccentric 2222 and the second eccentric 2223, so that the consumption of the rotation of the first eccentric 2222 and the second eccentric 2223 can be reduced, wherein the lower end of the second eccentric 2223 is connected with a power source 223 for driving the eccentric 2222 to rotate.

Moreover, the push rod 221 is located between the first eccentric wheel 2222 and the second eccentric wheel 2223, and is sleeved on the plug pin 2224, the push rod 221 has a connecting ring 2211 with a key groove shape at the rear end, and when the first eccentric wheel 2222 and the second eccentric wheel 2223 rotate, the plug pin 2224 is driven to do circular motion; the plug 2224 drives the connecting ring 2211 to reciprocate, so that the oil in the delivery pipe 32 is continuously moved to the pushing chamber 33.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, so: equivalent changes made according to the structure, shape and principle of the invention shall be covered by the protection scope of the invention.

Claims (10)

1. An eccentric mechanism for driving a push rod (221) of a plunger device (1) to move, characterized by comprising at least:

a switch member (21) for controlling the opening and closing of the plunger device (1); and

a power drive member (22) for powering the plunger arrangement (1);

wherein the power drive member (22) has at least:

an eccentric member (222) partially located within the first return conduit (341), the push rod (221) for pushing oil in;

a driving power source (223) for providing rotational kinetic energy to the eccentric member (222).

2. An eccentric mechanism according to claim 1, characterized in that the eccentric member (222) has:

a first eccentric wheel (2222) having one end connected to the driving power source (223), the first eccentric wheel (2222) being used for transmitting the kinetic energy of the driving power source (223);

a second eccentric (2223) arranged opposite to the first eccentric (2222);

the first eccentric wheel (2222) and the second eccentric wheel (2223) are provided with eccentric holes (2225), and the eccentric holes (2225) of the first eccentric wheel (2222) and the eccentric holes (2225) of the second eccentric wheel (2223) are arranged oppositely;

the bolt (2224) is located between the first eccentric wheel (2222) and the second eccentric wheel (2223), and the first eccentric wheel (2222) and the second eccentric wheel (2223) are sleeved at two ends of the bolt (2224) respectively.

3. An eccentric mechanism according to claim 1, characterized in that the eccentric member (222) has:

the bearings (2221) are sleeved on the first eccentric wheel (2222) and the second eccentric wheel (2223) respectively and are used for consuming the first eccentric wheel (2222) and the second eccentric wheel (2223).

4. An eccentric mechanism according to claim 2, characterized in that the push rod (221) has a connecting ring (2211) in the shape of a key groove at its rear end;

the connecting ring (2211) is sleeved on the bolt (2224) and is used for driving the push rod (221) to move back and forth.

5. An eccentric mechanism according to claim 4, characterized in that it further comprises:

planetary gears are employed between the eccentric member (222) and the driving power source (223) for increasing the efficiency of rotation.

6. A pipe expander, comprising:

a plunger device (1) for flaring a pipe; it has a thimble component (11) and a flaring component (12);

the two ends of the hydraulic device (3) are matched with the plunger device (1) and the power device (2);

power plant (2) comprising a driving power source (223), a reduction mechanism and an eccentric mechanism as claimed in any one of claims 1-5.

7. The pipe expander of claim 6,

wherein the hydraulic device (3) has:

an oil tank (31) for storing liquid;

a delivery duct (32) communicating with the tank (31), the power driving member (22) being partially located within the delivery duct (32);

a push chamber (33) for driving the ejector pin member (11); the ejector pin component (11) is partially positioned in the conveying pipeline (32) and is used for pushing the ejector pin component (11) to move back and forth.

8. The tube expander according to claim 7, characterized in that said hydraulic means (3) comprise:

a return duct (34) communicating with the push chamber (33) and the tank (31), respectively, and the opening and closing member (21) being located at least partially within the return duct (34).

9. A tube expander as claimed in claim 8, wherein said return conduit (34) has:

a first return conduit (341) communicating with the push chamber (33); and

and a second return pipeline (342) with two ends respectively communicated with the first return pipeline (341) and the oil tank (31), wherein the second return pipeline (342) is used for communicating and conveying the liquid from the pushing chamber (33) to the oil tank (31).

10. The pipe expander of claim 9,

the second return conduit (342) has:

a communicating section (3421) for the opening and closing member (21) to move back and forth;

and a pushing section (3422) communicated with the first return pipe (341) for providing a space for the oil supply to push the top rod (211).

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