CN114289575A

CN114289575A - Integrated front fork anti-concave forming device and front fork produced by same

Info

Publication number: CN114289575A
Application number: CN202111606925.7A
Authority: CN
Inventors: 高仕恒; 陈继; 陈俊卿; 高建辉; 胡建军; 王岗; 张镭
Original assignee: XUZHOU DAYI METALFORMING EQUIPMENT CO Ltd
Current assignee: XUZHOU DAYI METALFORMING EQUIPMENT CO Ltd
Priority date: 2021-12-27
Filing date: 2021-12-27
Publication date: 2022-04-08
Anticipated expiration: 2041-12-27
Also published as: CN114289575B

Abstract

The invention discloses an integrated front fork concavity-preventing forming device and a front fork produced by the same. The invention belongs to the technical field of front fork production, and particularly relates to an integrated front fork dent-proof forming device and a front fork produced by the same; the straight part of the branch fork frame can be supported from the inside through the cylindrical inner supporting rod, so that the branch fork frame is prevented from sinking during extrusion, and the cylindrical inner supporting rod can be smoothly taken out after the forming is finished because the straight part of the branch fork frame is straight; the top and the bottom of the arc-shaped bending part can be respectively supported from the inside through a flexible bidirectional pre-tightening mechanism which can be completely bidirectional, so that the arc-shaped bending part is prevented from being sunken when the die is extruded; the curvature of the guide metal rod is adjusted through the bottom top support adjusting mechanism and the translational push-pull connecting rod mechanism, so that the support position is controlled.

Description

Integrated front fork anti-concave forming device and front fork produced by same

Technical Field

The invention belongs to the technical field of front fork production, and particularly relates to an integrated front fork dent-proof forming device and a front fork produced by the same.

Background

The front wheel of the bicycle and the electric bicycle is generally used as a supporting frame by a simple fork structure, a front fork is also an important component of a bicycle body, the front fork of the existing bicycle is generally formed by welding a thick straight pipe and a thin bent part, and the fork mainly has the following problems:

a: the process is complicated, and the steps of cutting, bending, polishing, welding and the like are required;

b: the product is not beautiful, the welding positions are more, and the welding beads are complex;

c: the bearing capacity is weak, and because the connecting position of the two materials is an acute angle, stress concentration is easy to generate during use, and fatigue, aging and even fracture are easy to occur;

d: high production cost and low efficiency.

Therefore, the invention mainly provides the integrated front fork dent prevention forming device which is attractive in appearance, directly formed by one pipe, smooth and smooth in transition surface and strong in bearing capacity, and the front fork produced by the integrated front fork dent prevention forming device.

Disclosure of Invention

Aiming at the situation, in order to overcome the defects of the prior art, the invention provides an integrated front fork dent prevention forming device which has beautiful appearance, is directly formed by a pipe, has smooth and smooth transition surface and strong bearing capacity, and a front fork produced by the integrated front fork dent prevention forming device; the bottom of a thick steel pipe is divided into two parts, and then the two parts are stretched and deformed in a bending and extrusion forming mode, so that the integrated front fork with simple structure, low material cost, smooth profile, strong bearing capacity and attractive appearance is produced.

Although the integrated front fork has many advantages, the problem that the existing production technology faces is that the integrated front fork is easy to recess inwards during bending, once the integrated front fork is largely recessed, the bearing capacity is rapidly reduced, and the advantages of the integrated front fork are greatly reduced, so that if the situation that the recess does not occur in the extrusion process is ensured, the scheme with high feasibility is adopted for supporting from the inside; before the arc bending part and the straight part of the branch fork frame are closed, the integrated front fork can easily put an internal supporting structure into the cutting separation groove, but the technical problem that people need to solve is how to take out the integrated front fork after forming; from this angle, the internal support at the arc-shaped bending part needs to be both hard enough (ensuring the strength and effect of the support) and soft enough (being able to be taken out after molding), which is a huge contradiction faced in the prior art.

The technical scheme adopted by the invention is as follows: the invention provides an integrated front fork dent-proof forming device, which comprises a flexible pre-tightening dent-proof inner support device, a stepped jacking adjustment driving mechanism, a split self-guiding bending die, a hydraulic bending driving mechanism and a stepped forming linkage mechanism, wherein the flexible pre-tightening dent-proof inner support device is arranged in the split self-guiding bending die and has the functions of supporting from the inside and preventing the product from sinking in the pressing process, the stepped jacking adjustment driving mechanism is arranged on the flexible pre-tightening dent-proof inner support device and has the function of manually adjusting two-way support, the hydraulic bending driving mechanisms are symmetrically arranged on the split self-guiding bending die, the split self-guiding bending die has the function of limiting the appearance of the product from the outside, and the hydraulic bending driving mechanism has the function of driving the die to be matched, the step-by-step forming linkage mechanisms are symmetrically arranged on the split type self-guiding bending die and have the function of controlling the linkage of the external bending die and the internal bending die.

Furthermore, the flexible pre-tightening type concave-prevention inner supporting device comprises a flexible bidirectional pre-tightening mechanism, a translational push-pull connecting rod mechanism and a bottom jacking adjusting mechanism, the flexible bidirectional pre-tightening mechanism is arranged in the split type self-guiding bending die in a sliding mode, the flexible bidirectional pre-tightening mechanism has the inner portion for supporting the arc-shaped bending portion and can take out the arc-shaped bending portion, the translational push-pull connecting rod mechanism is arranged on the flexible bidirectional pre-tightening mechanism, the translational push-pull connecting rod mechanism can be synchronously close to or far away from the bottom jacking adjusting mechanism under the driving of the bottom jacking adjusting mechanism, and the bottom jacking adjusting mechanism is arranged on the translational push-pull connecting rod mechanism.

Preferably, the flexible bidirectional pre-tightening mechanism comprises a cylindrical inner support rod, a guide metal rod and a bidirectional pre-tightening support ring, the cylindrical inner supporting rod is arranged in the split type self-guiding bending die in a sliding manner, one end of the cylindrical inner supporting rod is provided with a central hole of the inner supporting rod, the guide metal rod is clamped in the central hole of the inner support rod, has certain flexibility (elasticity) and has the function of supporting the bidirectional pre-tightening support ring, the guide metal rod is fixedly connected with the cylindrical inner support rod, the other end of the guide metal rod is provided with a metal rod hinge joint, the bidirectional pre-tightening support ring is provided with a support ring center ring, the bidirectional pre-tightening support ring is arranged on the guide metal rod through the support ring center ring array, the outer diameter of the bidirectional pre-tightening support ring is slightly smaller than the inner diameter of the arc bending part, and the flexible bidirectional pre-tightening mechanism can be smoothly taken out of the integrated front fork body.

As a further preferred feature of the present invention, the translational push-pull linkage mechanism includes a translational joint, a first push-pull drive link, and a second push-pull drive link, the translational joint is provided with a single translational-joint, the translational joint is rotatably disposed on the metal rod joint through the single translational-joint, the translational joint is provided with a double translational-joint, the first push-pull drive link is rotatably disposed at one end of the double translational-joint, the second push-pull drive link is rotatably disposed at the other end of the double translational-joint, the first push-pull drive link and the second push-pull drive link are symmetrically disposed to ensure that the translational joint slides laterally during adjustment, and the first push-pull drive link and the second push-pull drive link are disposable parts and need to be cut after molding.

As a further preferred aspect of the present invention, the bottom jacking adjustment mechanism comprises an elevating nut, a half-pipe-shaped bottom support seat and an adjustment stud body, wherein the elevating nut is symmetrically provided with nut lugs, the other end of the first push-pull driving connecting rod is rotatably provided on the nut lugs, the elevating nut is provided with internal nut threads, the half-pipe-shaped bottom support seat is symmetrically provided with support seat hinge parts, the other end of the second push-pull driving connecting rod is rotatably provided on the support seat hinge parts, the half-pipe-shaped bottom support seat is provided with a support seat round platform, the half-pipe-shaped bottom support seat is provided with internal support seat threads on the support seat round platform, the adjustment stud body is provided with a thread boundary round platform, the adjustment stud body is provided with a positive thread part and a negative thread part on two sides of the thread boundary round platform respectively, and the positive thread part is in threaded connection with the internal nut threads, the reverse thread part is in threaded connection with the inner thread of the supporting seat, and the thread directions of the positive thread part and the reverse thread part are opposite, so that when the adjusting stud body rotates, the lifting nut and the semi-tubular bottom supporting seat can be synchronously close to or far away from the thread boundary circular truncated cone relative to the adjusting stud body, and the adjusting stud body is provided with a square clamping part.

Furthermore, the stepped jacking adjustment driving mechanism comprises an adjustment rod supporting disk, a rotary adjustment rod and a rotary driving rod, the adjustment rod supporting disk is clamped on the split type self-guiding bending die, supporting disk hollow grids are arranged on the adjustment rod supporting disk and have a position avoiding effect, tools for cutting a first push-pull driving connecting rod and a second push-pull driving connecting rod can stretch into the split type self-guiding bending die from the support disk, the rotary adjustment rod is rotatably arranged in the rotary adjustment rod, an inner square round platform of the adjustment rod is arranged at one end of the rotary adjustment rod, a square clamping part is clamped in the inner square round platform of the adjustment rod, an adjustment rod round hole is formed in the other end of the rotary adjustment rod, and the rotary driving rod is clamped in the adjustment rod round hole.

Furthermore, the split type self-guiding bending die comprises an integrated front fork body, a top fixing die, an external bending die and an internal bending die, the flexible pre-tightening type concave-prevention inner supporting device is positioned in the integrated front fork body, the integrated front fork body is of an integrally formed structure, and smooth transition is formed at a bending position, so that materials can be saved, the working procedure can be simplified, stress concentration can be avoided, the welding requirement can be reduced, the service life can be prolonged, and the attractiveness can be improved; the adjustable front fork is characterized in that the adjusting rod supporting disk is clamped at the end of the integrated front fork body, the top fixing mold is clamped on the integrated front fork body, the internal bending mold is clamped in the integrated front fork body, the external bending mold is clamped and slidably arranged on the internal bending mold, and the cylindrical internal supporting rod is arranged on the external bending mold.

Furthermore, the hydraulic bending driving mechanism comprises a hydraulic cylinder support, a die closing hydraulic cylinder body and a hydraulic cylinder end support, the hydraulic cylinder support is symmetrically arranged on the top fixed die, the die closing hydraulic cylinder body is clamped in the hydraulic cylinder support, the hydraulic cylinder end support is clamped in the external bending die, support round holes are symmetrically arranged on the hydraulic cylinder end support, and a push rod of the die closing hydraulic cylinder body penetrates through the support round holes.

Furthermore, the step-by-step forming linkage mechanism comprises a first right-angle base, a second right-angle base, a telescopic sleeve, a telescopic rod and a high-modulus pre-tightening spring, wherein the first right-angle base is arranged on an external bending die, the second right-angle base is arranged on an internal bending die, the telescopic sleeve is arranged on the first right-angle base, the telescopic rod is arranged on the second right-angle base, the telescopic rod is clamped and slidably arranged in the telescopic sleeve, one end of the high-modulus pre-tightening spring is arranged on the first right-angle base, and the other end of the high-modulus pre-tightening spring is arranged on the second right-angle base.

Wherein, the guide metal rod is made of elastic metal.

Further, this scheme still discloses a front fork of concave forming device production is prevented to integral type front fork, including main part fork frame portion and the cutting separating groove that is located central point and puts, the cutting produces, is equipped with the arc portion of bending in the bottom symmetry of main part fork frame portion, is equipped with the straight portion of a fork frame in the bottom of arc portion of bending, is equipped with the crotch slope deformation portion that is used for the transition between main part fork frame portion and the arc portion of bending.

The invention with the structure has the following beneficial effects:

(1) the straight part of the branch fork frame can be supported from the inside through the cylindrical inner supporting rod, so that the straight part of the branch fork frame is prevented from sinking during extrusion, and the cylindrical inner supporting rod can be smoothly taken out after the forming is finished because the straight part of the branch fork frame is straight;

(2) the top and the bottom of the arc-shaped bending part can be respectively supported from the inside through a flexible bidirectional pre-tightening mechanism which can be completely bidirectional, so that the arc-shaped bending part is prevented from being sunken when the die is extruded;

(3) the curvature of the guide metal rod is adjusted through the bottom jacking adjusting mechanism and the translational push-pull connecting rod mechanism, so that the supporting part of the bidirectional pre-tightening supporting ring is controlled;

(4) the diameter of the arc-shaped bending part is smaller than that of the cylindrical inner support rod, and the two-way pre-tightening support ring can swing in the arc-shaped bending part in a small range, so that the two-way pre-tightening support ring can be smoothly taken out of the arc-shaped bending part;

(5) when the square clamping part is clamped in the square round table in the adjusting rod, a certain pretightening force and friction force exist between the square clamping part and the square round table, so that the bottom jacking adjusting mechanism can still be connected to the stepped jacking adjusting driving mechanism after the push-pull driving connecting rod I and the push-pull driving connecting rod II are sheared;

(6) the profile of the integrated front fork body can be limited from the outside through the extrusion limit of the top fixing die, the external bending die and the internal bending die;

(7) the external bending die and the internal bending die are designed into a sequential extrusion form, so that the upper and lower supports of the bidirectional pre-tightening support ring do not need to be carried out simultaneously, the diameter of the bidirectional pre-tightening support ring can be designed to be smaller than the inner diameter of the arc-shaped bending part, and the situation that the bidirectional pre-tightening support ring is clamped in the arc-shaped bending part is avoided;

(8) the outer bending die and the inner bending die can be connected through the step-by-step forming linkage mechanism, and the two motions are simultaneously driven under the condition that the same group of driving devices are used, so that the structure is simplified, and the cost is saved;

(9) because the first push-pull driving connecting rod and the second push-pull driving connecting rod are symmetrically distributed, when the adjusting stud body rotates, the translational type hinge joint can only transversely move in the horizontal direction, the movement of parts can be controlled more conveniently, and the locking is prevented.

Drawings

FIG. 1 is a perspective view of an integrated front fork anti-denting molding device according to the present invention;

FIG. 2 is a front view of an integrated front fork anti-denting molding device according to the present invention;

FIG. 3 is a cross-sectional view taken along section line A-A of FIG. 2;

FIG. 4 is a cross-sectional view taken along section line B-B of FIG. 3;

FIG. 5 is a cross-sectional view taken along section line C-C of FIG. 3;

FIG. 6 is a schematic structural diagram of a flexible pre-tightening type anti-concave inner support device of the integrated front fork anti-concave forming device provided by the invention;

FIG. 7 is a schematic structural view of a stepped jacking adjustment driving mechanism of the integrated front fork dent prevention forming device provided by the invention;

FIG. 8 is a schematic structural view of a split type self-guiding bending die of the integrated front fork dent prevention forming device provided by the invention;

FIG. 9 is a schematic structural view of a hydraulic bending driving mechanism of the integrated front fork anti-dent forming device according to the present invention;

FIG. 10 is a schematic structural view of a step-by-step forming linkage mechanism of the integrated front fork dent prevention forming device according to the present invention;

FIG. 11 is an enlarged view of a portion of FIG. 3 at I;

FIG. 12 is an enlarged view of a portion of FIG. 3 at II;

FIG. 13 is an enlarged view of a portion of FIG. 6 at III;

FIG. 14 is a schematic pre-forming view of the unitary front fork body;

FIG. 15 is a schematic post-forming view of the unitary front fork body.

The flexible pre-tightening type anti-concave inner support device comprises a flexible pre-tightening type anti-concave inner support device, a step-by-step jacking adjusting driving mechanism, a split type self-guiding bending die, a hydraulic bending driving mechanism, a step-by-step forming linkage mechanism, a flexible two-way pre-tightening mechanism, a translation type push-pull connecting rod mechanism, a bottom jacking adjusting mechanism, a cylindrical inner support rod, a guide metal rod 11, a two-way pre-tightening support ring, a translation type hinge joint 12, a translation type hinge joint 13, a push-pull driving connecting rod I, a push-pull driving connecting rod II, a push-pull driving connecting rod 15, a lifting nut, a semi-tubular bottom support seat 17, an adjusting stud body, an inner support rod center hole, a metal rod hinge joint 19, a nut inner thread 20, a support ring center ring 21, a translation head single hinge joint, a translation head 22, a translation head double hinge joint, a nut inner thread 23, a nut lug 24, a nut lug boss 25, a circular table 26, Supporting seat internal threads, 27, a supporting seat hinge portion, 28, a thread boundary circular truncated cone, 29, a positive thread portion, 30, a reverse thread portion, 31, a square clamping portion, 32, an adjusting rod supporting disk, 33, a rotating adjusting rod, 34, a rotating driving rod, 35, a supporting disk hollow space, 36, an adjusting rod inner square circular truncated cone, 37, an adjusting rod circular hole, 38, an integrated front fork body, 39, a top fixing mold, 40, an external bending mold, 41, an internal bending mold, 42, a main body fork frame portion, 43, a cutting separation groove, 44, an arc-shaped bending portion, 45, a fork frame straight portion, 46, a fork frame slope deformation portion, 47, a hydraulic cylinder support, 48, a die assembly hydraulic cylinder body, 49, a hydraulic cylinder end support, 50, a support circular hole, 51, a right-angle base I, 52, a right-angle base II, 53, a telescopic sleeve, 54, a telescopic rod, 55 and a high-modulus pre-tightening spring.

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present invention.

As shown in figure 1, the invention provides an integrated front fork dent prevention forming device, which comprises a flexible pre-tightening dent prevention inner support device 1, a step-by-step propping adjustment driving mechanism 2, a split type self-guiding bending die 3, a hydraulic bending driving mechanism 4 and a step-by-step forming linkage mechanism 5, wherein the flexible pre-tightening dent prevention inner support device 1 is arranged in the split type self-guiding bending die 3, the flexible pre-tightening dent prevention inner support device 1 has the functions of supporting from the inside and preventing the product from sinking in the pressing process, the step-by-step propping adjustment driving mechanism 2 is arranged on the flexible pre-tightening dent prevention inner support device 1, the step-by-step propping adjustment driving mechanism 2 has the function of manually adjusting the two-way support, the hydraulic bending driving mechanisms 4 are symmetrically arranged on the split type self-guiding bending die 3, and the split type self-guiding bending die 3 has the function of limiting the appearance of the product from the outside, the hydraulic bending driving mechanism 4 has the effect of driving the die to be closed, the step-by-step forming linkage mechanisms 5 are symmetrically arranged on the split type self-guiding bending die 3, and the step-by-step forming linkage mechanisms 5 have the effect of controlling the linkage of the external bending die 40 and the internal bending die 41.

As shown in fig. 1 and 8, the split type self-guiding bending die 3 includes an integrated front fork body 38, a top fixing die 39, an external bending die 40 and an internal bending die 41, the flexible pre-tightening type concave-preventing inner support device 1 is located in the integrated front fork body 38, the integrated front fork body 38 is of an integrally formed structure, and smooth transition is provided at a bending position, so that materials can be saved, the process can be simplified, stress concentration can be avoided, welding requirements can be reduced, the service life can be prolonged, and the attractiveness can be improved; the adjusting rod supporting disk 32 is clamped at the end of the integrated front fork body 38, the top fixing mold 39 is clamped on the integrated front fork body 38, the internal bending mold 41 is clamped in the integrated front fork body 38, the external bending mold 40 is clamped and slidably arranged on the internal bending mold 41, and the cylindrical internal supporting rod 9 is arranged on the external bending mold 40.

As shown in fig. 1, 3, 4, 6, 11, 12 and 13, the flexible pre-tightening type anti-concave inner supporting device 1 comprises a flexible bidirectional pre-tightening mechanism 6, a translational push-pull link mechanism 7 and a bottom jacking adjusting mechanism 8, the flexible bidirectional pre-tightening mechanism 6 is slidably arranged in the split type self-guiding bending die 3, the flexible bidirectional pre-tightening mechanism 6 has an inner part for supporting an arc-shaped bending part 44 and can be taken out of the flexible bidirectional pre-tightening mechanism, the translational push-pull link mechanism 7 is arranged on the flexible bidirectional pre-tightening mechanism 6, the translational push-pull link mechanism 7 can be synchronously close to or far away from under the driving of the bottom jacking adjusting mechanism 8, and the bottom jacking adjusting mechanism 8 is arranged on the translational push-pull link mechanism 7; the flexible bidirectional pre-tightening mechanism 6 comprises a cylindrical inner support rod 9, a guide metal rod 10 and a bidirectional pre-tightening support ring 11, the cylindrical inner support rod 9 is slidably arranged in the split type self-guide bending die 3, one end of the cylindrical inner supporting rod 9 is provided with an inner supporting rod central hole 18, the guide metal rod 10 is clamped in the inner supporting rod central hole 18, the guide metal rod 10 has certain flexibility (elasticity) and has the function of supporting the bidirectional pre-tightening support ring 11, the guide metal rod 10 is fixedly connected with the cylindrical inner support rod 9, the other end of the guide metal rod 10 is provided with a metal rod hinge joint 19, the bidirectional pre-tightening support ring 11 is provided with a support ring central ring 20, the bidirectional pre-tightening support ring 11 is arranged on the guide metal rod 10 in an array mode through the support ring central ring 20, the outer diameter of the bidirectional pre-tightening support ring 11 is slightly smaller than the inner diameter of the arc-shaped bending part 44, and the flexible bidirectional pre-tightening mechanism 6 can be smoothly taken out of the integrated front fork body 38; the translational push-pull connecting rod mechanism 7 comprises a translational hinged head 12, a first push-pull driving connecting rod 13 and a second push-pull driving connecting rod 14, wherein a translational head single hinged part 21 is arranged on the translational hinged head 12, the translational hinged head 12 is rotatably arranged on a metal bar hinged head 19 through the translational head single hinged part 21, a translational head double hinged part 22 is arranged on the translational hinged head 12, the first push-pull driving connecting rod 13 is rotatably arranged at one end of the translational head double hinged part 22, the second push-pull driving connecting rod 14 is rotatably arranged at the other end of the translational head double hinged part 22, the first push-pull driving connecting rod 13 and the second push-pull driving connecting rod 14 are symmetrically arranged, the translational hinged head 12 is ensured to transversely slide during adjustment, the first push-pull driving connecting rod 13 and the second push-pull driving connecting rod 14 are disposable parts and need to be cut after forming is completed; the bottom jacking adjusting mechanism 8 comprises a lifting nut 15, a semi-tubular bottom supporting seat 16 and an adjusting stud body 17, wherein the lifting nut 15 is symmetrically provided with a nut lug 24, the other end of a first push-pull driving connecting rod 13 is rotatably arranged on the nut lug 24, the lifting nut 15 is provided with a nut internal thread 23, the semi-tubular bottom supporting seat 16 is symmetrically provided with a supporting seat hinge part 27, the other end of a second push-pull driving connecting rod 14 is rotatably arranged on the supporting seat hinge part 27, the semi-tubular bottom supporting seat 16 is provided with a supporting seat round platform 25, the semi-tubular bottom supporting seat 16 is provided with a supporting seat internal thread 26 on the supporting seat round platform 25, the adjusting stud body 17 is provided with a thread dividing platform 28, the adjusting stud body 17 is respectively provided with a positive thread part 29 and a negative thread part 30 on two sides of the thread dividing platform 28, the positive thread part 29 is in threaded connection with the nut internal thread 23, and the negative thread part 30 is in threaded connection with the supporting seat internal thread 26, because the thread directions of the positive thread part 29 and the negative thread part 30 are opposite, when the adjusting stud body 17 rotates, the lifting nut 15 and the semi-tubular bottom support base 16 can synchronously approach or separate from the thread boundary circular truncated cone 28 relative to the adjusting stud body 17, and the adjusting stud body 17 is provided with a square clamping part 31.

As shown in fig. 1 and 7, the stepped jacking adjustment driving mechanism 2 includes an adjustment rod support plate 32, a rotation adjustment rod 33 and a rotation driving rod 34, the adjustment rod support plate 32 is engaged with the split type self-guiding bending die 3, a support plate hollow space 35 is provided on the adjustment rod support plate 32, the support plate hollow space 35 has a space avoiding function, a tool for cutting the first push-pull driving connecting rod 13 and the second push-pull driving connecting rod 14 can extend from the support plate hollow space, the rotation adjustment rod 33 is rotatably provided in the rotation adjustment rod 33, an adjustment rod inner square circular platform 36 is provided at one end of the rotation adjustment rod 33, the square clamping portion 31 is engaged with the adjustment rod inner square circular platform 36, an adjustment rod circular hole 37 is provided at the other end of the rotation adjustment rod 33, and the rotation driving rod 34 is engaged with the adjustment rod circular hole 37.

As shown in fig. 1, 3, 5, and 9, the hydraulic bending driving mechanism 4 includes a hydraulic cylinder support 47, a mold clamping hydraulic cylinder body 48, and a hydraulic cylinder end support 49, the hydraulic cylinder support 47 is symmetrically disposed on the top fixing mold 39, the mold clamping hydraulic cylinder body 48 is engaged with the hydraulic cylinder support 47, the hydraulic cylinder end support 49 is engaged with the external bending mold 40, a support circular hole 50 is symmetrically disposed on the hydraulic cylinder end support 49, and a push rod of the mold clamping hydraulic cylinder body 48 passes through the support circular hole 50.

As shown in fig. 1, 2, 3 and 10, the step-by-step forming linkage mechanism 5 includes a first right-angle base 51, a second right-angle base 52, a telescopic sleeve 53, a telescopic rod 54 and a high-modulus pre-tightening spring 55, the first right-angle base 51 is disposed on the external bending die 40, the second right-angle base 52 is disposed on the internal bending die 41, the telescopic sleeve 53 is disposed on the first right-angle base 51, the telescopic rod 54 is disposed on the second right-angle base 52, the telescopic rod 54 is slidably engaged with the telescopic sleeve 53, one end of the high-modulus pre-tightening spring 55 is disposed on the first right-angle base 51, and the other end of the high-modulus pre-tightening spring 55 is disposed on the second right-angle base 52.

The guide metal rod 10 is made of elastic metal.

As shown in fig. 14 and 15, the front fork produced by the integrated front fork dent prevention forming device comprises a main body fork frame part 42 and a cutting separation groove 43 which is positioned at the central position and is generated by cutting, wherein arc bending parts 44 are symmetrically arranged at the bottom of the main body fork frame part 42, a branch fork frame straight part 45 is arranged at the bottom of the arc bending part 44, and a fork frame slope deformation part 46 for transition is arranged between the main body fork frame part 42 and the arc bending parts 44.

When the integrated front fork is used specifically, firstly, a user needs to fix the cut integrated front fork body 38 in the top fixing mold 39, and then the bottom of the integrated front fork body 38 is branched; then the die assembly hydraulic cylinder body 48 is driven to retract, and the integrated front fork body 38 is clamped and slides between the external bending die 40 and the cylindrical inner supporting rod 9 under the top support of the flexible pre-tightening type concave-preventing inner supporting device 1;

when the die-closing hydraulic cylinder body 48 retracts, due to the existence of the step-by-step forming linkage mechanism 5, the extrusion motion of the external bending die 40 can be ahead of the extrusion of the internal bending die 41, and after the square clamping part 31 is preliminarily clamped into the square round table 36 in the adjusting rod, the rotary adjusting rod 33 and the adjusting stud body 17 are driven to rotate in a manner of twisting the rotary driving rod 34, so that the lifting nut 15 and the semi-tubular bottom supporting seat 16 are close to each other;

at the moment, the translational joint 12 is pushed by the first push-pull driving connecting rod 13 and the second push-pull driving connecting rod 14 to expand towards the outer side, and meanwhile, the curvature radius of the guide metal rod 10 tends to increase, so that the bidirectional pre-tightening support ring 11 supports the outer side of the arc-shaped bending part 44;

continuing retracting the die-closing hydraulic cylinder body 48, and finishing the molding of the outer side of the arc-shaped bent part 44 under the double extrusion of the bidirectional pre-tightening support ring 11 and the top fixing die 39;

then reversely twisting the rotating driving rod 34, driving the adjusting stud body 17 to rotate through the rotating adjusting rod 33, so that the lifting nut 15 and the semi-tubular bottom supporting seat 16 are far away from each other, at the moment, the semi-tubular bottom supporting seat 16 provides support from the inner side of the top of the arc-shaped bending part 44, the sinking in the extrusion process is prevented, meanwhile, the translational hinge joint 12 is close to each other under the action of the first push-pull driving connecting rod 13 and the second push-pull driving connecting rod 14, and meanwhile, the trend of reducing the curvature radius of the guide metal rod 10 is achieved, and further, the bidirectional pre-tightening supporting ring 11 supports the inner side of the arc-shaped bending part 44;

and continuously retracting the die-closing hydraulic cylinder body 48, moving the arc-shaped bending part 44 to the limit position at the moment, and performing extrusion forming on the inner side of the arc-shaped bending part 44 through the internal bending die 41 and the bidirectional pre-tightening support ring 11 to complete the processing of the integrated front fork body 38.

After the processing is finished, a tool extends into the main body fork part 42 from the supporting plate hollow space 35, the first push-pull driving connecting rod 13 and the second push-pull driving connecting rod 14 are cut off (the first push-pull driving connecting rod 13 and the second push-pull driving connecting rod 14 are replaced with new push-pull driving connecting rods 14 next time), then the flexible bidirectional pre-tightening mechanism 6 and the cylindrical inner support rod 9 are taken out from the straight part 45 of the supporting fork frame in a mode of extending the die-closing hydraulic cylinder body 48, and the bottom jacking adjusting mechanism 8 is taken out together with the stepped jacking adjusting driving mechanism 2.

The above is the overall working process of the invention, and the steps are repeated when the device is used next time.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a concave forming device is prevented to integral type front fork which characterized in that: the flexible pre-tightening type anti-concave inner support device comprises a flexible pre-tightening type anti-concave inner support device (1), a stepped jacking adjusting and driving mechanism (2), a split type self-guiding bending die (3), a hydraulic bending driving mechanism (4) and a stepped forming linkage mechanism (5), wherein the flexible pre-tightening type anti-concave inner support device (1) is arranged in the split type self-guiding bending die (3), the stepped jacking adjusting and driving mechanism (2) is arranged on the flexible pre-tightening type anti-concave inner support device (1), the hydraulic bending driving mechanism (4) is symmetrically arranged on the split type self-guiding bending die (3), and the stepped forming linkage mechanism (5) is symmetrically arranged on the split type self-guiding bending die (3); the flexible pre-tightening type anti-concave inner supporting device (1) comprises a flexible two-way pre-tightening mechanism (6), a translational push-pull connecting rod mechanism (7) and a bottom jacking adjusting mechanism (8), the flexible two-way pre-tightening mechanism (6) is slidably arranged in the split type self-guiding bending die (3), the translational push-pull connecting rod mechanism (7) is arranged on the flexible two-way pre-tightening mechanism (6), and the bottom jacking adjusting mechanism (8) is arranged on the translational push-pull connecting rod mechanism (7).

2. The integrated front fork dent prevention forming device of claim 1, wherein: the flexible bidirectional pre-tightening mechanism (6) comprises a cylindrical inner support rod (9), a guide metal rod (10) and a bidirectional pre-tightening support ring (11), the cylindrical inner support rod (9) is arranged in the split type self-guide bending die (3) in a sliding mode, an inner support rod center hole (18) is formed in one end of the cylindrical inner support rod (9), the guide metal rod (10) is clamped in the inner support rod center hole (18), the guide metal rod (10) is fixedly connected with the cylindrical inner support rod (9), a metal rod hinge joint (19) is arranged at the other end of the guide metal rod (10), a support ring center ring (20) is arranged on the bidirectional pre-tightening support ring (11), and the bidirectional pre-tightening support ring (11) is arranged on the guide metal rod (10) in an array mode through the support ring center ring (20).

3. The integrated front fork dent prevention forming device of claim 2, wherein: the translation type push-pull connecting rod mechanism (7) comprises a translation type hinge joint (12), a first push-pull driving connecting rod (13) and a second push-pull driving connecting rod (14), a translation type single hinge part (21) is arranged on the translation type hinge joint (12), the translation type hinge joint (12) is rotatably arranged on the metal bar hinge joint (19) through the translation type single hinge part (21), a translation type double hinge part (22) is arranged on the translation type hinge joint (12), the first push-pull driving connecting rod (13) is rotatably arranged at one end of the translation type double hinge part (22), and the second push-pull driving connecting rod (14) is rotatably arranged at the other end of the translation type double hinge part (22).

4. The integrated front fork dent prevention forming device of claim 3, wherein: the bottom jacking adjusting mechanism (8) comprises a lifting nut (15), a semi-tubular bottom supporting seat (16) and an adjusting stud body (17), wherein nut lug bosses (24) are symmetrically arranged on the lifting nut (15), the other end of a first push-pull driving connecting rod (13) is rotatably arranged on the nut lug bosses (24), nut internal threads (23) are arranged on the lifting nut (15), supporting seat hinged parts (27) are symmetrically arranged on the semi-tubular bottom supporting seat (16), the other end of a second push-pull driving connecting rod (14) is rotatably arranged on the supporting seat hinged parts (27), a supporting seat round table (25) is arranged on the semi-tubular bottom supporting seat (16), supporting seat internal threads (26) are arranged on the supporting seat round table (25) of the semi-tubular bottom supporting seat (16), and a thread round table (28) is arranged on the adjusting stud body (17), adjusting stud body (17) and being equipped with regular thread portion (29) and anti-thread portion (30) respectively in the both sides of screw thread boundary round platform (28), regular thread portion (29) and nut internal thread (23) threaded connection, anti-thread portion (30) and supporting seat internal thread (26) threaded connection, be equipped with square clamping part (31) on adjusting stud body (17).

5. The integrated front fork dent prevention forming device of claim 4, wherein: the stepped top support adjusting and driving mechanism (2) comprises an adjusting rod supporting disk (32), a rotating adjusting rod (33) and a rotating driving rod (34), the adjusting rod supporting disk (32) is clamped on the split type self-guiding bending die (3), supporting disk hollow spaces (35) are formed in the adjusting rod supporting disk (32), the rotating adjusting rod (33) is rotatably arranged in the rotating adjusting rod (33), an adjusting rod inner square round table (36) is arranged at one end of the rotating adjusting rod (33), a square clamping portion (31) is clamped in the adjusting rod inner square round table (36), an adjusting rod round hole (37) is formed in the other end of the rotating adjusting rod (33), and the rotating driving rod (34) is clamped in the adjusting rod round hole (37).

6. The integrated front fork dent prevention forming device of claim 5, wherein: the split type self-guiding bending die (3) comprises an integrated front fork body (38), a top fixing die (39), an external bending die (40) and an internal bending die (41), the flexible pre-tightening type concave-prevention inner supporting device (1) is located in the integrated front fork body (38), the adjusting rod supporting disk (32) is clamped at the end of the integrated front fork body (38), the top fixing die (39) is clamped on the integrated front fork body (38), the internal bending die (41) is clamped in the integrated front fork body (38), the external bending die (40) is clamped and slidably arranged on the internal bending die (41), and the cylindrical inner supporting rod (9) is arranged on the external bending die (40).

7. The integrated front fork dent prevention forming device of claim 6, wherein: the hydraulic bending driving mechanism (4) comprises a hydraulic cylinder support (47), a die closing hydraulic cylinder body (48) and a hydraulic cylinder end support (49), the hydraulic cylinder support (47) is symmetrically arranged on the top fixing die (39), the die closing hydraulic cylinder body (48) is clamped in the hydraulic cylinder support (47), the hydraulic cylinder end support (49) is clamped in the external bending die (40), support round holes (50) are symmetrically arranged on the hydraulic cylinder end support (49), and a push rod of the die closing hydraulic cylinder body (48) penetrates through the support round holes (50).

8. The integrated front fork dent prevention forming device of claim 7, wherein: the step-by-step forming linkage mechanism (5) comprises a first right-angle base (51), a second right-angle base (52), a telescopic sleeve (53), a telescopic rod (54) and a high-modulus pre-tightening spring (55), wherein the first right-angle base (51) is arranged on an external bending die (40), the second right-angle base (52) is arranged on an internal bending die (41), the telescopic sleeve (53) is arranged on the first right-angle base (51), the telescopic rod (54) is arranged on the second right-angle base (52), the telescopic rod (54) is clamped and slidably arranged in the telescopic sleeve (53), one end of the high-modulus pre-tightening spring (55) is arranged on the first right-angle base (51), and the other end of the high-modulus pre-tightening spring (55) is arranged on the second right-angle base (52).

9. The integrated front fork dent prevention forming device of claim 8, wherein: the guide metal rod (10) is made of elastic metal.

10. A front fork produced by an integrated front fork dent prevention molding device according to claim 9, comprising a main body fork frame portion (42), characterized in that: the fork frame is characterized by further comprising a cutting separation groove (43) which is located in the center and is generated by cutting, arc bending portions (44) are symmetrically arranged at the bottom of the main body fork frame portion (42), a fork frame straight portion (45) is arranged at the bottom of the arc bending portion (44), and a fork frame slope deformation portion (46) used for transition is arranged between the main body fork frame portion (42) and the arc bending portion (44).