CN215998401U

CN215998401U - Double-spring feeding reset structure of hydraulic pipe fitting machining tool conical head

Info

Publication number: CN215998401U
Application number: CN202121709280.5U
Authority: CN
Inventors: 蒋友荣
Original assignee: Zhejiang Value Mechanical & Electrical Products Co ltd
Current assignee: Zhejiang Value Mechanical & Electrical Products Co ltd
Priority date: 2021-07-26
Filing date: 2021-07-26
Publication date: 2022-03-11
Anticipated expiration: 2031-07-26

Abstract

The utility model discloses a pipe fitting processing tool, which provides a double-spring feeding reset structure of a hydraulic pipe fitting processing tool conical head, which can greatly reduce the shearing stress of a spring, prolong the service life of the spring, has high reliability, saves energy consumption and improves processing efficiency, and solves the technical problems that the reset spring has large stress when the pipe fitting is processed, the spring is easy to fatigue fracture, the material and processing requirements of the spring are higher, the production cost is obviously improved, the use reliability cannot be ensured and the like in the prior art. When the cone head is fed forward to the maximum stroke, the piston is arranged on the rear supporting ring in an overhead mode and enables the power-assisted spring to be in a compressed state.

Description

Double-spring feeding reset structure of hydraulic pipe fitting machining tool conical head

Technical Field

The utility model relates to a pipe fitting machining tool, in particular to a double-spring feeding reset structure of a hydraulic pipe fitting machining tool conical head, which can greatly reduce the shearing stress of a spring, prolong the service life of the spring, save energy consumption and improve the machining efficiency.

Background

The pipe fitting processing tool generally includes pipe expander, pipe expander and pipe press, etc., and is used for changing the inner and outer diameters of pipe fitting when various containers are manufactured and maintained, so that the pipe and pipe plate contact portion can be tightly jointed, and can bear a certain pressure. However, the existing pipe fitting processing generally has the following problems that after the pipe fitting processing is completed, the deformation of a processed pipe can cause the pipe fitting chuck to be tightly held on the conical head, and the existing structure generally overcomes the friction force of the conical head through a return spring sleeved outside the conical head so as to reset the piston and the conical head (the force is larger, generally about 750N at the maximum), and also needs to overcome the flow resistance (the force is smaller, generally about 200N at the maximum) for extruding hydraulic oil to an oil bag, so that the stress of the return spring is large when the maximum compression amount is reached, the phenomenon of fatigue fracture of the spring is easily caused, the requirements on the material and the processing of the spring are higher, the production cost is obviously improved, and the use reliability cannot be guaranteed.

Disclosure of Invention

The utility model mainly provides the double-spring feeding reset structure of the hydraulic pipe fitting machining tool conical head, which can greatly reduce the shearing stress of the spring, prolong the service life of the spring, has high use reliability, saves energy consumption and improves the machining efficiency, and solves the technical problems that the reset spring has high stress when the pipe fitting is machined, the spring is easy to fatigue and fracture, the requirements on the material and machining of the spring are higher, the production cost is obviously improved, the use reliability cannot be ensured and the like in the prior art.

The technical problem of the utility model is mainly solved by the following technical scheme: the utility model provides a double spring of hydraulic pressure pipe fitting machining tool conical head feeds reset structure, includes the drive chamber on the body, and the drive intracavity is being connected the conical head through piston sliding, and the conical head overcoat is being equipped with reset spring, the outside cover of reset spring front end is equipped with helping hand spring, and presss from both sides between helping hand spring and reset spring and be equipped with sliding sleeve, and sliding sleeve's rear end outwards extends formation back support ring again along helping hand spring's rear end face, when the conical head fed forward to the maximum stroke, the piston overhead is on the back support ring and makes helping hand spring be compression state. The power-assisted spring is sleeved at the front end of the outer side of the reset spring, the front section stroke of the conical head, the compression deformation of the reset spring at the inner side, the rear section stroke of the conical head, the reset spring and the power-assisted spring are simultaneously compressed and deformed, namely, a segmented compression spring mode is adopted, when the pipe fitting is machined, only the reset spring is compressed and deformed, and when the pipe fitting is machined, the power-assisted spring is simultaneously compressed and deformed, so that the conical head clamped on the expansion pipe head can be powerfully and quickly separated through the common restoring force of the reset spring and the power-assisted spring, compared with the method only using a single reset spring, the shearing stress of the reset spring is greatly reduced, the material and machining requirements on the spring can be reduced, the production cost is saved, the use reliability is improved, the service life of the spring is prolonged, the energy consumption of the driving piston is low, the piston is flexibly reset and quickly reacts, and the machining efficiency of the pipe fitting is improved; when the pipe fitting machining tool is machined and reset at the same time, the inner spring support and the outer spring support are adopted, the cone head is good in advancing and retreating stability and energy absorption effect, the cone head shaking is reduced, the vibration and the noise are reduced, the machining quality is favorably ensured, the abrasion of the cone head and a piston is reduced, and the service life of the pipe fitting machining tool is prolonged; the piston enables the power spring to compress through the rear supporting ring, the diameter of the piston can be reduced, and meanwhile the power spring can be guaranteed to be stably compressed, so that the small-size portable requirement of a pipe fitting machining tool is met.

Preferably, the stiffness of the return spring is smaller than the stiffness of the booster spring. The small-stroke power-assisted spring has large load, the large-stroke return spring has small load, so that the energy consumption can be saved, the shearing stress of the two springs is low, the two springs are safe and cannot be broken, and the use reliability is high.

Preferably, the front end of the sliding sleeve extends inwards along the front end face of the return spring to form a front support ring, and when the conical head is fed forwards to the maximum stroke, a gap is formed between the front support ring and the front end face of the corresponding driving cavity. Through the support ring before setting up, can be in the later stage of pipe fitting processing to and when the conical head breaks away from, reset spring is the translation state, and reset spring can not participate in promptly, only relies on the helping hand spring in the outside to replace reset spring and carries out the operation, thereby reduces the rigidity demand to reset spring, practices thrift manufacturing cost.

Preferably, the drive cavity corresponding to the booster spring extends outwards to form a booster cavity, and the booster spring is positioned in the booster cavity. The power spring is arranged in the power cavity independently, so that the space gap where the spring is located is increased, and the spring is prevented from scraping the cavity wall.

Preferably, a guiding sleeve is sleeved on the outer side of the front end of the conical head, a rear port of the guiding sleeve is screwed on a port of the driving cavity, and the rear supporting ring is clamped between the booster spring and the port of the driving cavity. Through setting up the derivation sleeve pipe, the equipment of relevant spare parts such as reset spring and helping hand spring of being convenient for is torn open and is traded.

More preferably, the outer circumferential surface of the tip of the slide bush is slidably connected to the inner circumferential surface of the lead-out bush. The front end of the sliding sleeve is in sliding connection with the inner ring surface of the guiding sleeve, namely the telescopic direction of the return spring is stabilized by limiting the position of the sliding sleeve, and the conical head is prevented from deflecting.

Preferably, a baffle ring is clamped between the return spring and the piston, the baffle ring is sleeved on the conical head and clamps and fixes the inner side end of the conical head in the central hole of the piston, the outer ring surface of the baffle ring extends forwards along the outer ring surface of the return spring to form a pushing ring, and the piston is propped on the rear support ring through the pushing ring. The inner side end of the conical head is fixed in the middle hole of the piston through the baffle ring, the conical head is convenient to disassemble and assemble, and the positioning is reliable; the piston can balance the force application position through the pushing ring by pushing the rear supporting ring on the pushing ring, so that the requirement of laying small space is met, and meanwhile, the abrasion of the end face of the piston can be avoided.

Preferably, the piston rests on the rear support ring when the bit is advanced forward to 1/2 to 3/4 of maximum travel. The proportional length of the power-assisted spring relative to the reset spring is reasonably set, the rigidity of the spring is maximally reduced on the premise of meeting the use requirement, the manufacturing cost is reduced, and meanwhile, the energy consumption is saved.

Preferably, the rotation directions of the return spring and the boosting spring are opposite. When the rotation directions of the return spring and the power-assisted spring are opposite, the inner supporting force and the outer supporting force can be balanced, and the conical head is ensured not to be stressed and deflected.

Preferably, a main seal ring is provided on an outer circumferential surface of the piston, and an auxiliary seal ring is fitted around the piston corresponding to a front side of the main seal ring. The auxiliary sealing ring is added, so that the deflection phenomenon of the piston is obviously improved, the abrasion between the piston and the wall surface of the cavity is reduced, and meanwhile, dirt on the inner wall of the cavity can be scraped by the auxiliary sealing ring, so that the phenomenon that the dirt is adhered to the main sealing ring to cause oil leakage is avoided.

Therefore, the double-spring feeding reset structure of the hydraulic pipe fitting processing tool conical head has the following advantages:

1. the spring structure with inner and outer sectional type is adopted, the shearing stress of the spring is low, the phenomenon of fracture cannot occur, and the spring is safe and reliable;

2. when the driving piston operates, the energy consumption of the spring is low, and more energy is saved;

3. the clearance between the inner wall of the cavity and the spring is large, so that the phenomenon of scraping of the spring cannot occur;

4. the conical head is clamped and positioned in an extrusion mode, and the fixing mode is simple and reliable;

5. the auxiliary sealing ring is additionally arranged, so that the deflection phenomenon of the piston can be obviously improved, and simultaneously dirt on the inner wall of the cavity can be scraped, and the phenomenon that the dirt is adhered to the main sealing ring to cause oil leakage is avoided.

Description of the drawings:

FIG. 1 is a schematic structural diagram of a double-spring feed return structure of a hydraulic pipe fitting machining tool bit of the present invention;

FIG. 2 is a schematic view of the spring assist of the present invention when activated;

FIG. 3 is a schematic view of the construction of the present invention when the maximum feed of the conical head is reached;

fig. 4 is a graph of spring force versus piston stroke in the present invention.

The specific implementation mode is as follows:

the technical scheme of the utility model is further specifically described by the following embodiments and the accompanying drawings.

Example (b):

as shown in figure 1, the double-spring feeding reset structure of the hydraulic pipe fitting processing tool conical head comprises a main body 1 of the pipe fitting processing tool, wherein the front end of the main body 1 is provided with a driving cavity 2, a guide sleeve 10 is screwed outside the port of the driving cavity 2, the driving cavity 2 is connected with the conical head 3 in a sliding way through a piston 7, the rear end part of the outer ring surface of the piston 7 is provided with a main sealing ring 11, an auxiliary sealing ring 12 is sleeved outside the piston 7 corresponding to the side of the main sealing ring 11, the main sealing ring 11 and the auxiliary sealing ring 12 are both embedded in an annular mounting groove corresponding to the outer ring surface of the piston 7, the front end part of the conical head 3 passes through a middle hole of the guide sleeve 10 to extend out of the guide sleeve 10 when sliding forwards, a reset spring 4 is sleeved outside the conical head 3, the inner side end of the reset spring 4 is abutted against the outer end surface of the piston 7, the outer side end is abutted against the middle hole edge of the guide sleeve 10, a baffle ring 9 is clamped between the inner side end of the reset spring 4 and the outer end surface of the piston 7, the baffle ring 9 is sleeved on the conical head 3 in a matching way, the middle part of the outer end surface of the piston 7 corresponding to the conical head 3 is provided with a counter bore, the inner end of the conical head 3 is provided with a raised head which is embedded in the counter bore in a matching way, the inner ring surface of the baffle ring 9 extends inwards to the outer ring surface of the conical head 3 along the edge of the counter bore and the end surface of the raised head, so that the raised head is clamped and fixed in the counter bore of the piston 7, the outer ring surface of the baffle ring 9 extends forwards along the outer ring surface of the return spring 4 to form a pushing ring 91, the outer side of the front end of the return spring 4 is sleeved with the power-assisted spring 5, the rotation directions of the return spring 4 and the power-assisted spring 5 are opposite, the rigidity of the return spring 4 is less than that of the power-assisted spring 5, a guide sleeve 10 corresponding to the power-assisted spring 5 extends outwards to form a power-assisted cavity 8, the inner end of the power-assisted cavity 8 is communicated with the edge of the port of the driving cavity 2, the power-assisted spring 5 is positioned in the power-assisted cavity 8, a sliding sleeve 6 is clamped between the power-assisted spring 5 and the return spring 4, the rear port of the sliding sleeve 6 extends outwards along the rear end face of the booster spring 5 to form a rear support ring 62, the rear support ring 62 is clamped between the rear end face of the booster spring 5 and the port edge of the drive cavity 2, the outer ring face of the front end part of the sliding sleeve 6 is connected to the inner ring face of the corresponding guide-out sleeve 10 on the front side of the booster cavity 8 in a sliding mode, the front port of the sliding sleeve 6 extends inwards along the front end face of the return spring 4 to form a front support ring 61, as shown in fig. 2, when the conical head 3 is fed forwards to 1/2-3/4 of the maximum stroke, the return spring 4 is in a compressed state, the front port of the push ring 91 is arranged on the rear support ring 62, as shown in fig. 3, when the conical head 3 is fed forwards to the maximum stroke, the booster spring 5 is in a compressed state, and a gap is formed between the front support ring 61 and the inner wall face of the front end of the corresponding guide-out sleeve 10.

When the hydraulic pipe fitting machining device is used, hydraulic oil pushes the piston 7 to slide forwards along the driving cavity 2, the return spring 4 is compressed continuously, when the front port of the push ring 91 abuts against the rear side face of the rear supporting ring 62, the push ring 91 pushes the sliding sleeve 6 to move forwards, the power-assisted spring 5 is compressed continuously, the return spring 4 is clamped between the front supporting ring 61 and the baffle ring 9 to keep an existing compression state until the conical head 3 is fed forwards to the maximum stroke, pipe fitting machining is completed, the conical head 3 runs in a reverse mode when being reset, as shown in fig. 4, the maximum stroke distance is set to be 17mm, when the conical head 3 is fed forwards to 13.5 mm, the front port of the push ring 91 abuts against the rear side face of the rear supporting ring 62, the shaded portion in the drawing is the work done by the spring, and the work done by the spring when one return spring is adopted is arranged below the dotted line.

The specific embodiments described herein are merely illustrative of the principles of the utility model. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the utility model as defined in the appended claims.

Claims

1. The utility model provides a double spring of hydraulic pressure pipe fitting machining tool conical head feeds reset structure, includes drive chamber (2) on body (1), is passing through piston (7) sliding connection conical head (3) in drive chamber (2), and conical head (3) overcoat is being reset spring (4), its characterized in that: the outer side of the front end of the reset spring (4) is sleeved with the power-assisted spring (5), a sliding sleeve (6) is clamped between the power-assisted spring (5) and the reset spring (4), the rear end of the sliding sleeve (6) extends outwards along the rear end face of the power-assisted spring (5) to form a rear support ring (62), and when the conical head (3) is fed forwards to the maximum stroke, the piston (7) is arranged on the rear support ring (62) in an overhead mode and enables the power-assisted spring (5) to be in a compression state.

2. The double-spring feeding and resetting structure of the hydraulic pipe machining tool conical head as claimed in claim 1, characterized in that: the rigidity of the return spring (4) is smaller than that of the power-assisted spring (5).

3. The double-spring feeding and resetting structure of the hydraulic pipe machining tool conical head as claimed in claim 1, characterized in that: the front end of the sliding sleeve (6) extends inwards along the front end face of the return spring (4) to form a front support ring (61), and when the conical head (3) feeds forwards to the maximum stroke, a gap is formed between the front support ring (61) and the front end face of the corresponding driving cavity (2).

4. The double-spring feeding and resetting structure of the hydraulic pipe machining tool conical head as claimed in claim 1, characterized in that: the driving cavity (2) corresponding to the boosting spring (5) extends outwards to form a boosting cavity (8), and the boosting spring (5) is located in the boosting cavity (8).

5. The double-spring feeding and resetting structure of the hydraulic pipe machining tool conical head as claimed in claim 1, characterized in that: the outer side of the front end of the conical head (3) is sleeved with a guide sleeve (10), the rear port of the guide sleeve (10) is screwed on the port of the driving cavity (2), and a rear supporting ring (62) is clamped between the power spring (5) and the port of the driving cavity (2).

6. The double-spring feeding and resetting structure of the hydraulic pipe machining tool conical head as claimed in claim 5, characterized in that: the outer ring surface of the front end of the sliding sleeve (6) is connected to the inner ring surface of the guiding sleeve (10) in a sliding mode.

7. The double-spring feeding and resetting structure of the hydraulic pipe machining tool conical head as claimed in claim 1, characterized in that: a baffle ring (9) is clamped between the return spring (4) and the piston (7), the baffle ring (9) is sleeved on the conical head (3) and clamps and fixes the inner side end of the conical head (3) in a middle hole of the piston (7), the outer ring surface of the baffle ring (9) extends forwards along the outer ring surface of the return spring (4) to form a pushing ring (91), and the piston (7) is arranged on the rear support ring (62) in an overhead mode through the pushing ring (91).

8. The double-spring feeding and resetting structure of the hydraulic pipe machining tool conical head as claimed in claim 1, characterized in that: when the cone head (3) is fed forward to 1/2-3/4 of the maximum stroke, the piston (7) is overhead on the rear support ring (62).

9. The double-spring feeding and resetting structure of the hydraulic pipe machining tool conical head as claimed in claim 1, characterized in that: the rotation directions of the return spring (4) and the boosting spring (5) are opposite.

10. The double-spring feeding and resetting structure of the hydraulic pipe machining tool conical head as claimed in claim 1, characterized in that: the outer ring surface of the piston (7) is provided with a main sealing ring (11), and an auxiliary sealing ring (12) is sleeved outside the piston (7) corresponding to the front side of the main sealing ring (11).