A milling head for road construction

Abstract

The application relates to a milling head for road construction, aiming at solving the technical problem of low working efficiency caused by the fixed milling area of the current milling head, and comprising a connecting frame, a double-head oil cylinder, a combined driving structure, a planetary outer edge driving mechanism and a milling unit. The double-head oil cylinder stroke working causes the equidistance telescopic unit to be expanded equidistantly, synchronously causes the milling fixed sleeve and a plurality of milling movable sleeves to be expanded, cooperates with the processing of a plurality of elastic members, causes the filling unit to be radially expanded, fills the gap between the milling fixed sleeve and the plurality of milling movable sleeves by the setting, cooperates with the bolt B to sequentially install a plurality of cutter heads A to the outer surface of the filling unit, synchronously improves the axial length of the milling head, effectively improves the milling area of the road construction operation, and relatively improves the operation efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of road construction, and in particular to a milling head for road construction. BACKGROUND

[0002] The milling head can be installed on a hydraulic excavator, efficiently replacing general configurations such as a bucket, a breaking hammer, and a hydraulic shear, and is applied to open-pit coal mines, tunnel excavation and contour correction, channel trench milling, asphalt concrete road milling, rock and permafrost milling, tree root milling, and other fields of road engineering ditches, slopes, and auxiliary facilities cutting or excavation, and damaged cement or asphalt pavement cleaning.

[0003] In the process of road repair construction, a fixed milling head is often used for direct milling and excavation. Different regions result in different levels of road repair structures. The upper surface is mostly a hard layer composed of concrete and asphalt. The lower layer has a hard stone layer or a sandstone layer, and a sandy soil layer based on different regions.

[0004] The conventional milling head used in road repair construction cannot be expanded. This method cannot effectively improve the milling efficiency. Therefore, it is particularly important to propose a milling head that can improve the milling contact area. In view of this, we propose a milling head for road construction. SUMMARY

[0005] The present application aims to overcome the shortcomings of the prior art, adapt to real needs, and provide a milling head for road construction to solve the technical problem of low work efficiency caused by the fixed work area of the current milling head.

[0006] In order to achieve the object of the present application, the technical scheme adopted by the present application is as follows: a milling head for road construction is designed, which comprises a connecting frame, a double-head oil cylinder, a combined driving structure, a planetary outer edge driving mechanism and a milling unit; wherein, the internal gap of the connecting frame forms a driving operation cavity; the double-head oil cylinder is arranged in the driving operation cavity; the combined driving structure is arranged on one side of the double-head oil cylinder and connected with the driving operation cavity; two planetary outer edge driving mechanisms are symmetrically arranged on the two sides of the double-head oil cylinder in the axial direction; two milling units are symmetrically arranged on the two sides of the double-head oil cylinder in the axial direction and connected with the connecting frame; and the double-head oil cylinder is rotationally connected with the milling unit; wherein, the milling unit comprises equidistant telescopic units, a milling fixed sleeve, milling movable sleeves, filling units and cutter heads A; two equidistant telescopic units are symmetrically arranged on the two sides of the connecting frame and connected with the double-head oil cylinder in the axial direction; the milling fixed sleeve is arranged on the side of the equidistant telescopic units close to the double-head oil cylinder; a plurality of milling movable sleeves are sequentially arranged on the movable ends of the equidistant telescopic units; a plurality of filling units are hingedly connected to the movable ends of the equidistant telescopic units; and a plurality of cutter heads A are arranged on the filling units through bolts B; wherein, the stroke work of the double-head oil cylinder causes the equidistant telescopic units to expand to form a flexible milling structure; and the return work of the double-head oil cylinder causes the equidistant telescopic units to contract to form a rigid milling structure.

[0007] Preferably, two support seats are sequentially arranged in the connecting frame, and the gap between the two support seats forms a driving cavity; wherein, installation grooves are formed on the surface of the support seats relative to the axial position of the milling unit; and hook-shaped rotation protrusions are arranged on the two ends of the connecting frame relative to the axial position of the milling unit.

[0008] Preferably, the combined driving structure comprises a combined gear, a synchronous gear A, a synchronous gear B and an oil pressure motor; the combined gear is arranged on the double-head oil cylinder through a bearing A; wherein, the combined gear is composed of one driving part and two output parts; the synchronous gear A is movably arranged in the driving cavity and connected with the combined gear; the synchronous gear B is movably arranged on the side of the synchronous gear A away from the combined gear and connected with the driving cavity; wherein, the synchronous gear A is meshingly connected with the combined gear and the synchronous gear B; and at least one oil pressure motor is keyed to the synchronous gear B and connected with the support seat.

[0009] Preferably, the planetary outer edge driving mechanism comprises an auxiliary tooth disc and planetary gears; the auxiliary tooth disc is arranged in the support seat through a bolt A; wherein, a plurality of meshing teeth A are annularly and equidistantly arranged on the inner wall of the auxiliary tooth disc; the gap between the inner wall of the auxiliary tooth disc and the outer wall of the output part forms a planetary driving cavity; a plurality of planetary gears are arranged in the planetary driving cavity; and the planetary gears are respectively meshingly connected with the meshing teeth A and the output part.

[0010] Preferably, the equidistant telescopic unit includes a fixed support sleeve, a first-stage movable sleeve, a second-stage movable sleeve, and a third-stage movable sleeve; the two fixed support sleeves are symmetrically arranged on both sides of the double-headed cylinder; wherein, the inner walls of the fixed support sleeves are symmetrically provided with toothed grooves A on both sides; the first-stage movable sleeve is arranged inside the fixed support sleeve; wherein, the first-stage movable sleeve is provided with a plurality of toothed grooves B in an annular shape at equal intervals; wherein, a plurality of equidistant adjusting gears A are sequentially hinged to the surface of the first-stage movable sleeve relative to the toothed grooves A; wherein, the first-stage movable sleeve is provided with a bearing B on the side closer to the double-headed cylinder; and, the first-stage movable sleeve is installed and connected to the double-headed cylinder through the bearing B; and, the first-stage movable sleeve is connected to the double-headed cylinder through... The bearing B is rotatably connected to the double-headed cylinder; the secondary movable sleeve is arranged inside the primary movable sleeve; wherein, the outer surface of the secondary movable sleeve is provided with a tooth groove C relative to the position of the equidistant adjusting gear A; wherein, the secondary movable sleeve is meshed with the fixed support sleeve through the tooth groove C, the equidistant adjusting gear A, and the tooth groove A; wherein, the outer surface of the secondary movable sleeve is provided with a plurality of equidistant adjusting gears B relative to the position of the tooth groove B; the tertiary movable sleeve is arranged inside the secondary movable sleeve; wherein, the outer surface of the tertiary movable sleeve is provided with a tooth groove D relative to the position of the equidistant adjusting gear B; wherein, the tertiary movable sleeve is meshed with the primary movable sleeve through the tooth groove D and the equidistant adjusting gear B.

[0011] Preferably, the milling fixed sleeve is fixed to the fixed support sleeve by a connecting block; and the milling fixed sleeve is movably arranged on the planetary gear by an extension shaft; and the first-stage movable sleeve, the second-stage movable sleeve and the third-stage movable sleeve are all fixed with a hinge head ring block A on the side away from the double-headed cylinder, and the milling moving sleeve is fixed to the end of the hinge head ring block A respectively; wherein, the surface of the milling fixed sleeve and the milling moving sleeve is provided with a plurality of cutter heads B in an annular shape at equal intervals.

[0012] Preferably, the filling unit comprises a hinge ring block B, a first connecting rod, a central retaining connecting rod, an auxiliary extension block, a filling block A, a filling block B; the hinge ring block B is arranged on the side opposite to the hinge ring block A and close to the double-headed oil cylinder; the gap between the hinge ring block B and the hinge ring block A constitutes a hinge cavity; two first connecting rods are symmetrically arranged in the hinge cavity; and a plurality of groups of first connecting rods are arranged in the hinge cavity in a ring shape at equal intervals; wherein the end of the first connecting rod away from the hinge ring block B is provided with a triangular extrusion part; the central retaining connecting rod is hingedly connected to the first connecting rod through a second connecting rod and a third connecting rod; at least one auxiliary extension block is hingedly connected to the end of the first connecting rod; the filling block A is movably arranged on the auxiliary extension block; wherein the horizontal position between the filling block A and the two first connecting rods is provided with a correction block; and the correction block is internally provided with a plug-in hole matched with the shape of the central retaining connecting rod; wherein a filling block B is arranged between two adjacent correction blocks; wherein four staggered protrusions are symmetrically arranged on the surface of the filling block B; and a receiving groove is arranged on the position of the filling block A relative to the filling block B; wherein an inclined extrusion groove is arranged on the position of the filling block A relative to the receiving groove; wherein the outer edge surface of the filling block A is in a stepped shape; and the outer edge surface of the filling block A is composed of a mounting surface, a horizontal surface, an inclined surface and a top surface; wherein the height of the filling block B is the same as the height of the mounting surface; and the milling excavation fixed sleeve and a plurality of milling excavation movable sleeves are provided with internal chamfers close to the side of the filling block A.

[0013] Preferably, one filling unit located at the position of the primary movable sleeve is elastically connected to the milling excavation fixed sleeve through a spring A and a connecting block; one filling unit located at the position of the secondary movable sleeve is elastically connected to the primary movable sleeve through a spring B; and one filling unit located at the position of the tertiary movable sleeve is elastically connected to the secondary movable sleeve through a spring C.

[0014] Preferably, the stroke movement of the double-headed oil cylinder causes the equidistant telescopic unit to drive the milling excavation fixed sleeve and a plurality of milling excavation movable sleeves to expand at equal intervals, and the filling unit to expand radially to form a flexible milling excavation structure through the spring A, the spring B and the spring C; and the return movement of the double-headed oil cylinder causes the equidistant telescopic unit to drive the milling excavation fixed sleeve and a plurality of milling excavation movable sleeves to contract at equal intervals, and the filling unit to fold radially to form a rigid milling excavation structure.

[0015] A method for using a milling head for road construction:

[0016] S100: installation processing: the milling head is installed on the excavator operating arm through bolts and nuts;

[0017] S200: milling adjustment processing:

[0018] If the hard road surface is milled: the double-head oil cylinder is returned to work and the relative extrusion filling unit is assisted by manual operation to cause the spring A, spring B, spring C to shrink, and in the axial return work of the first movable sleeve, the second movable sleeve and the third movable sleeve and the equidistant contraction of the milling movable sleeve are synchronized, and the milling fixed sleeve, the equidistant contraction of the milling movable sleeve and the continuous contraction of the extrusion filling block A are set in the chamfer, and the extrusion of the two adjacent filling blocks A is used to extrude the staggered protrusions in the receiving groove to make the filling block B shrink inside the receiving groove; when the hinge ring block A is sequentially close, the spring A, spring B, spring C are synchronously extruded and compressed, so that the milling fixed sleeve, the milling movable sleeve are sequentially attached, and the first movable sleeve, the second movable sleeve and the third movable sleeve are sequentially inserted;

[0019] If the road base is milled, the double-head oil cylinder is returned to work to make the first movable sleeve, the second movable sleeve and the third movable sleeve equidistantly expand, and the first connecting rod is rotated, and the extrusion filling block A is extruded by the first connecting rod triangular part, and the extrusion of the two adjacent filling blocks A is used to extrude the staggered protrusions in the receiving groove to make the filling block B expand inside the receiving groove, so that the filling block B is inserted into the gap between the first movable sleeve, the second movable sleeve and the third movable sleeve and the fixed support sleeve, and the cutter A is installed on the filling block A by manual installation;

[0020] S300: drive processing: the synchronous gear B, the synchronous gear A and the combination gear are driven by the oil pressure motor to rotate, and the two output parts of the combination gear are used to rotate the multiple planetary gears, so that the rotation of the multiple planetary gears drives the fixed support sleeve to rotate and mill;

[0021] S400: cleaning processing: the surface and the inside of the milling unit are cleaned by the cleaning tool, and the oil maintenance processing is carried out.

[0022] Compared with the prior art, the beneficial effects of the present application are:

[0023] 1. The double-head oil cylinder stroke work of the present application causes the equidistant expansion unit to expand equidistantly, and the milling fixed sleeve, the milling movable sleeve and the multiple elastic members are expanded synchronously, so that the filling unit is radially expanded, the gaps between the milling fixed sleeve and the milling movable sleeve are filled, and the multiple cutters A are sequentially installed on the outer surface of the filling unit by the bolt B, which synchronously increases the axial length of the milling head, effectively increases the milling area of the road surface construction operation, and relatively improves the operation efficiency.

[0024] 2. The present application is composed of a combination gear by driving part and two output parts, so that the combination gear can be driven by synchronous gear A, synchronous gear B and oil motor to move the planetary outer edge driving mechanism relative to the two axial synchronous driving of double-headed oil cylinder, and the synchronous driving milling unit can perform milling work, so as to solve the basic rotary milling work required by the extensible milling head.

[0025] 3. The present application is based on the installation slot and bolt A to install and connect the auxiliary tooth disc, and cooperate with the planetary gear setting, so that the multiple planetary gears can revolve, and the revolving work can form the driving milling unit rotary milling action, which can effectively avoid the motion interference between the backflush and rotary work caused by the double-headed oil cylinder setting.

[0026] 4. The present application is provided by the secondary movable sleeve through the tooth groove C, equidistant adjustment gear A, tooth groove A and fixed support sleeve engagement connection, and the third movable sleeve through the tooth groove D, equidistant adjustment gear B and the first movable sleeve engagement connection, so that the first movable sleeve can be driven synchronously by the double-headed oil cylinder to move axially, and the second movable sleeve and the third movable sleeve can be expanded equidistantly, and the basic milling fixed sleeve and the several milling movable sleeves can be expanded by the above-mentioned adjustment.

[0027] 5. The present application is based on the elastic energy release of the elastic member, so that the hinge ring block B is synchronously close to the hinge ring block A connected, and the first connecting rod is adjusted relative to the rotation by the close of the hinge ring block B, and the filling block A is expanded relative to the rotation angle of the first connecting rod, and the second connecting rod, the third connecting rod and the center maintaining connecting rod are set, and the correction block is inserted and moved, so that the rotation amplitude of the two first connecting rods is consistent, and the angle of the correction block is controlled, so that the basic stability of the center correction block is maintained during the radial expansion work, and the expansion distance of the filling block A is increased synchronously by the triangular extrusion part during the radial expansion work, so that the filling block A can move to the outer wall side distance of the milling fixed sleeve and the several milling movable sleeves by increasing the expansion distance of the filling block A; at the same time, based on the radial expansion movement of the two adjacent filling blocks A, the filling block B is forced to perform three-stage linkage expansion work by the inclined extrusion groove, so as to fill the necessary activity gap of the two adjacent filling blocks A, and to reduce the damage of the device caused by the entry of the milling work sundries, dust and stones into the milling fixed sleeve and the several milling movable sleeves.

[0028] 6. The present application is used for adapting to the milling work of the relatively soft soil in the road construction by the flexible milling structure, and the filling unit in the milling head is expanded based on the elastic element, which is relatively suitable for the hard pavement breaking work, and the filling unit and the cutter head A are relatively easy to receive the rigid collision force of the hard pavement, and the flexible milling structure of the milling head is more suitable for the basic soft soil milling work, and the milling efficiency of the relatively soft soil is improved; and the rigid milling structure is used to adapt to the basic work required for the hard road breaking and finishing, and the functionality and the milling operation efficiency of the milling cutter are effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a schematic diagram of the rigid milling structure of the present application.

[0030] Figure 2 It is a schematic diagram of the flexible milling structure of the present application.

[0031] Figure 3 It is a schematic diagram of the connecting frame sectional structure of the present application.

[0032] Figure 4 It is a schematic diagram of the connecting frame sectional structure of the present application.

[0033] Figure 5 It is a schematic diagram of the planetary outer edge driving mechanism of the present application.

[0034] Figure 6 It is a schematic diagram of the milling unit split structure of the present application.

[0035] Figure 7 It is a schematic diagram of the equal distance telescopic unit split structure of the present application.

[0036] Figure 8 It is a schematic diagram of the filling unit sectional structure of the present application.

[0037] Figure 9 It is a schematic diagram of the present application Figure 8 A local enlarged structure schematic diagram.

[0038] Figure 10 It is a schematic diagram of the filling block A internal top view structure of the present application.

[0039] Figure 11 It is a schematic diagram of the filling block A, filling block B sectional structure of the present application.

[0040] Figure 12 It is a schematic diagram of the filling block A and the milling fixed sleeve, milling movable sleeve internal front view structure of the present application.

[0041] Figure: 1, connecting frame; 2, double-head oil cylinder; 3, combined driving structure; 4, planetary outer edge driving mechanism; 5, milling and digging unit; 6, equidistant telescopic unit; 7, milling and digging fixed sleeve; 8, milling and digging movable sleeve; 9, filling unit; 10, cutter head A;

[0042] 101, support seat; 102, mounting groove; 103, hooking rotating protrusion;

[0043] 301, combined gear; 302, synchronous gear A; 303, synchronous gear B; 304, oil hydraulic motor;

[0044] 401, auxiliary toothed disc; 402, planetary gear;

[0045] 601, fixed support sleeve; 6011, tooth groove A; 6012, connecting block; 602, first-level movable sleeve; 6021, tooth groove B; 6022, equidistant adjustment gear A; 6023, bearing B; 603, second-level movable sleeve; 6031, tooth groove C; 6032, equidistant adjustment gear B; 604, third-level movable sleeve; 6041, tooth groove D; 609, hinge ring block A;

[0046] 901, hinge ring block B; 902, first connecting rod; 9031, second connecting rod; 9032, third connecting rod; 903, centering retaining connecting rod; 904, auxiliary extension block; 905, filling block A; 9051, correction block; 9052, extrusion groove; 906, filling block B; 9061, misalignment protrusion. Embodiment

[0047] The application will be further described below in conjunction with the drawings and embodiments:

[0048] Embodiment 1: A milling and digging head for road construction, as shown in Figures 1 to 12, including the connecting frame 1, the double-headed oil cylinder 2, the combined driving structure 3, the planetary outer edge driving mechanism 4 and the milling and digging unit 5; wherein the internal gap of the connecting frame 1 forms a driving operation cavity; the double-headed oil cylinder 2 is arranged in the driving operation cavity; the combined driving structure 3 is arranged on one side of the double-headed oil cylinder 2 and connected with the driving operation cavity; the two planetary outer edge driving mechanisms 4 are symmetrically arranged on the two sides of the double-headed oil cylinder 2 in the axial direction; the two milling and digging units 5 are symmetrically arranged on the two sides of the double-headed oil cylinder 2 in the axial direction and connected with the connecting frame 1; and the double-headed oil cylinder 2 is rotationally connected with the milling and digging unit 5; wherein the milling and digging unit 5 comprises the equidistant telescopic unit 6, the milling and digging fixed sleeve 7, the milling and digging movable sleeve 8, the filling unit 9 and the cutter head A 10; the two equidistant telescopic units 6 are symmetrically arranged on the two sides of the connecting frame 1 in the axial direction and connected with the double-headed oil cylinder 2; the milling and digging fixed sleeve 7 is arranged on the side of the equidistant telescopic unit 6 close to the double-headed oil cylinder 2; the plurality of milling and digging movable sleeves 8 are sequentially arranged on the movable end of the equidistant telescopic unit 6; the plurality of filling units 9 are hingedly connected to the movable end of the equidistant telescopic unit 6; and the plurality of cutter heads A 10 are arranged on the filling unit 9 through bolts B; wherein the double-headed oil cylinder 2 stroke operation causes the equidistant telescopic unit 6 to expand to form a flexible milling and digging structure; and the double-headed oil cylinder 2 return stroke operation causes the equidistant telescopic unit 6 to contract to form a rigid milling and digging structure.

[0049] Specifically, two support seats 101 are sequentially arranged in the connecting frame 1, and the gap between the two support seats 101 forms a driving cavity; wherein the surface of the support seat 101 is provided with a mounting groove 102 relative to the axial position of the milling and digging unit 5; and the two ends of the connecting frame 1 are provided with hooking rotation protrusions 103 relative to the axial position of the milling and digging unit 5. The support seat 101 can effectively improve the overall rigidity of the connecting frame 1, and the mounting groove 102 can simultaneously limit the connection of the planetary outer edge driving mechanism 4 to maintain the stability of the operation.

[0050] Further, the combined driving structure 3 comprises a combined gear 301, a synchronous gear A 302, a synchronous gear B 303 and an oil hydraulic motor 304; the combined gear 301 is arranged on the double-acting oil cylinder 2 through a bearing A; wherein the combined gear 301 is composed of a driving part and two output parts; the synchronous gear A 302 is movably arranged in a driving cavity and connected with the combined gear 301; the synchronous gear B 303 is movably arranged on a side of the synchronous gear A 302 away from the combined gear 301 and connected with the driving cavity; wherein the synchronous gear A 302 is in meshing connection with the combined gear 301 and the synchronous gear B 303; and at least one oil hydraulic motor 304 is keyed to the synchronous gear B 303 and connected with the support seat 101. According to the combined gear 301 composed of the driving part and the two output parts, the combined gear 301 can be driven by the synchronous gear A 302, the synchronous gear B 303 and the oil hydraulic motor 304 to move relative to the double-acting oil cylinder 2 in a synchronous driving planetary outer edge driving mechanism 4, and a synchronous driving milling unit 5 is driven to perform milling work, so as to solve the basic rotary milling work required by the extensible milling head.

[0051] Further, the planetary outer edge driving mechanism 4 comprises an auxiliary tooth disc 401 and a planetary gear 402; the auxiliary tooth disc 401 is arranged in the support seat 101 through a bolt A; wherein the inner wall of the auxiliary tooth disc 401 is annularly and equidistantly provided with a plurality of meshing teeth A; the gap between the inner wall of the auxiliary tooth disc 401 and the outer wall of the output part constitutes a planetary driving cavity; a plurality of planetary gears 402 are arranged in the planetary driving cavity; and the planetary gears 402 are respectively in meshing connection with the meshing teeth A and the output part. According to the installation of the auxiliary tooth disc 401 based on the mounting groove 102 and the bolt A, and the cooperation with the planetary gear 402, the plurality of planetary gears 402 are revolved, and the revolving work is used to form a rotary milling action of the driving milling unit 5, so as to effectively avoid the motion interference between the back-pushing and the rotary work caused by the double-acting oil cylinder 2.

[0052] It is worth noting that the equidistant telescopic unit 6 includes a fixed support sleeve 601, a first-stage movable sleeve 602, a second-stage movable sleeve 603, and a third-stage movable sleeve 604; the two fixed support sleeves 601 are symmetrically arranged on both sides of the double-headed cylinder 2; the inner walls of the fixed support sleeves 601 are symmetrically provided with toothed grooves A6011 on both sides; the first-stage movable sleeve 602 is arranged inside the fixed support sleeve 601; the first-stage movable sleeve 602 has several toothed grooves B6021 arranged in a ring at equal intervals; several equidistant adjusting gears A6022 are sequentially hinged to the surface of the first-stage movable sleeve 602 relative to the toothed grooves A6011; a bearing B6023 is provided on the side of the first-stage movable sleeve 602 closer to the double-headed cylinder 2; and the first-stage movable sleeve 602 is installed and connected to the double-headed cylinder 2 through the bearing B6023; and the first-stage movable sleeve 602 is connected to the double-headed cylinder 2 through the bearing B6023. 023 is rotatably connected to the double-headed hydraulic cylinder 2; the secondary movable sleeve 603 is arranged inside the primary movable sleeve 602; wherein, the outer surface of the secondary movable sleeve 603 is provided with a tooth groove C6031 relative to the position of the equidistant adjusting gear A6022; wherein, the secondary movable sleeve 603 is meshed with the fixed support sleeve 601 through the tooth groove C6031, the equidistant adjusting gear A6022, and the tooth groove A6011; wherein, the outer surface of the secondary movable sleeve 603 is provided with a plurality of equidistant adjusting gears B6032 relative to the position of the tooth groove B6021; the tertiary movable sleeve 604 is arranged inside the secondary movable sleeve 603; wherein, the outer surface of the tertiary movable sleeve 604 is provided with a tooth groove D6041 relative to the position of the equidistant adjusting gear B6032; wherein, the tertiary movable sleeve 604 is meshed with the primary movable sleeve 602 through the tooth groove D6041 and the equidistant adjusting gear B6032. This invention utilizes a secondary movable sleeve 603 connected to a fixed support sleeve 601 via a toothed groove C6031, an equidistant adjusting gear A6022, and a toothed groove A6011, and a tertiary movable sleeve 604 connected to a primary movable sleeve 602 via a toothed groove D6041 and an equidistant adjusting gear B6032. This allows the primary movable sleeve 602 to move axially synchronously driven by a double-headed hydraulic cylinder 2, and enables the synchronous control of the equidistant unfolding of the secondary movable sleeve 603 and the tertiary movable sleeve 604. This method enables the unfolding of the basic milling fixed sleeve 7 and several milling movable sleeves 8.

[0053] It is worth noting that the milling fixed sleeve 7 is fixed to the fixed support sleeve 601 via the connecting block 6012; and the milling fixed sleeve 7 is movably arranged on the planetary gear 402 via the extension shaft; and the first-stage movable sleeve 602, the second-stage movable sleeve 603, and the third-stage movable sleeve 604 are all fixed with a hinge ring block A609 on the side away from the double-headed cylinder 2, and the milling moving sleeve 8 is fixed to the end of the hinge ring block A609 respectively; wherein, the surfaces of the milling fixed sleeve 7 and the milling moving sleeve 8 are provided with a plurality of cutter heads B in an annular shape at equal intervals. The present invention uses the milling fixed sleeve 7 and the hook-and-rotate protrusions 103 on both sides of the connecting frame 1 for auxiliary limiting, while also allowing for movable rotation. By utilizing the above actions, the stability of the axial connection of the milling fixed sleeve 7 is improved simultaneously without affecting the rotation of the foundation.

[0054] It is worth noting that the filling unit 9 includes a hinge ring block B901, a first connecting rod 902, a central holding connecting rod 903, an auxiliary extension block 904, a filling block A905, and a filling block B906. The hinge ring block B901 is arranged on the side of the hinge ring block A609 that is relatively close to the double-headed cylinder 2. The gap between the hinge ring block B901 and the hinge ring block A609 forms a hinge cavity. Two first connecting rods 902 are symmetrically arranged in the hinge cavity. Furthermore, several sets of first connecting rods 902 are arranged in a ring at equal intervals within the hinge cavity. Among them, the end of the first connecting rod 902 that is relatively away from the hinge ring block B901 is provided with a triangular extrusion part. The central holding connecting rod 903 is hinged to the first connecting rod 902 through a second connecting rod 9031 and a third connecting rod 9032. At least one auxiliary extension block 904 is hinged to the end of the first connecting rod 902. The filling block A905 is movably arranged on the auxiliary extension block 904. A straightening block 9051 is horizontally positioned between the two first connecting rods 902 and the filling block A905; the straightening block 9051 has an insertion hole that matches the shape of the centering connecting rod 903; a filling block B906 is positioned between two adjacent straightening blocks 9051; the surface of the filling block B906 has four symmetrically arranged staggered protrusions 9061; a receiving groove is provided between the filling block A905 and the filling block B906; an inclined extrusion groove 9052 is provided between the filling block A905 and the receiving groove; the outer edge surface of the filling block A905 is stepped; the outer edge surface of the filling block A905 consists of a mounting surface, a horizontal surface, an inclined surface, and a top surface; the height of the filling block B906 is the same as the height of the mounting surface; the milling fixed sleeve 7 and several milling moving sleeves 8 are all chamfered on the side closest to the filling block A905.This invention is based on the release of elastic kinetic energy of an elastic element, causing the hinge ring block B901 to synchronously approach the connected hinge ring block A609. The approach of the hinge ring block B901 causes the first connecting rod 902 to rotate relative to each other. Adjusting the rotation angle of the first connecting rod 902 causes the filling block A905 to unfold relative to each other. Based on the above adjustment, a two-stage linkage operation is completed. Simultaneously, the second connecting rod 9031, the third connecting rod 9032, and the centering holding connecting rod 903 are arranged to cooperate with the insertion and movement of the straightening block 9051, keeping the rotation amplitude of the two first connecting rods 902 relatively consistent. This controls the placement angle of the straightening block 9051, maintaining the basic stability of the centering straightening block 9051 during the radial unfolding operation. At the same time, the triangular extrusion part can be used to... During the radial expansion process, the expansion distance of the filler block A905 is simultaneously increased. By increasing the expansion distance of the filler block A905, within the limited rotational amplitude of the first connecting rod 902, the filler block A905 can move to the outer wall side of the moving milling fixed sleeve 7 and several milling moving sleeves 8. Simultaneously, based on the radial expansion movement of two adjacent filler blocks A905, the inclined extrusion groove 9052 forces the filler block B906 to simultaneously perform a three-stage linkage expansion operation to fill the necessary misalignment gap between the radial contraction of the two adjacent filler blocks A905 and the relative annular shape, performing a secondary filling operation. This reduces the entry of debris, dust, and stones into the milling fixed sleeve 7 and several milling moving sleeves 8 during the milling operation, thus preventing damage to the device.

[0055] It is worth emphasizing that the filling unit 9 located relative to the primary movable sleeve 602 is elastically connected to the milling fixed sleeve 7 via spring A and connecting block 6012; one filling unit 9 located relative to the secondary movable sleeve 603 is elastically connected to the primary movable sleeve 602 via spring B; and one filling unit 9 located relative to the tertiary movable sleeve 604 is elastically connected to the secondary movable sleeve 603 via spring C. This invention uses elastic elements springs A, B, and C to apply elastic torque to the radial expansion of the filling unit 9.

[0056] In addition, the stroke motion of the double-headed hydraulic cylinder 2 causes the equidistant telescopic unit 6 to drive the milling fixed sleeve 7 and several milling movable sleeves 8 to expand equidistantly. Springs A, B, and C cause the filling unit 9 to expand radially, forming a flexible milling structure. The return stroke motion of the double-headed hydraulic cylinder 2 causes the equidistant telescopic unit 6 to drive the milling fixed sleeve 7 and several milling movable sleeves 8 to contract equidistantly, causing the filling unit 9 to fold radially, forming a rigid milling structure. This invention uses a flexible milling structure to adapt to milling work on relatively soft soil in road construction. Simultaneously, because the filling unit 9 in the milling head expands based on elastic elements, compared to hard road surface breaking work, the filling unit 9 and the cutter head A10 are relatively more susceptible to rigid impact forces from the hard road surface, resulting in retraction. Therefore, the flexible milling structure of this milling head is more suitable for milling work on soft soil foundations, simultaneously improving the milling efficiency on relatively soft soil. Furthermore, the rigid milling structure adapts to the needs of hard road surface breaking and repair in foundation work, effectively improving the functionality of the milling cutter and the working efficiency of the milling operation.

[0057] Example 2: A method for using a milling head for road construction:

[0058] S100: Installation procedure: Install the milling head onto the excavator boom using bolts and nuts;

[0059] S200: Milling Adjustment Process:

[0060] For milling work on hard road surfaces: The double-headed hydraulic cylinder 2 operates in a return stroke, and with manual assistance, the relative compression filling unit 9 causes springs A, B, and C to contract relative to each other. During the axial return stroke of the first-stage movable sleeve 602, the first-stage movable sleeve 602, the second-stage movable sleeve 603, the third-stage movable sleeve 604, and several milling moving sleeves 8 contract at equal intervals. This is coordinated with the milling fixed sleeve 7 and the milling moving sleeves 8, whose inner chamfered edges are fitted with compression filling blocks A905. As the contraction continues, two adjacent filling blocks A905 use the extrusion groove 9052 to extrude the misaligned protrusion 9061, causing the filling block B906 to contract and misalign within the receiving groove. When the hinge ring block A609 approaches in sequence, it simultaneously extrudes and compresses the springs A, B, and C, causing the milling fixed sleeve 7 and several milling movable sleeves 8 to fit together in sequence. The first-stage movable sleeve 602, the second-stage movable sleeve 603, the third-stage movable sleeve 604, and the fixed support sleeve 601 are then inserted in sequence.

[0061] If milling is to be carried out on the subgrade of the road, the return stroke of the double-headed hydraulic cylinder 2 causes the first-stage movable sleeve 602, the second-stage movable sleeve 603, and the third-stage movable sleeve 604 to unfold at equal intervals. At the same time, the two vertically distributed first connecting rods 902 rotate and the triangular part of the first connecting rod 902 is used to squeeze the filling block A905. Simultaneously, the two adjacent filling blocks A905 use the squeezing groove 9052 to squeeze the misaligned protrusion 9061, causing the filling block B906 to unfold inside the receiving groove. This causes the filling block B906 to be inserted into the gap between the first-stage movable sleeve 602, the second-stage movable sleeve 603, the third-stage movable sleeve 604, and the fixed support sleeve 601. The cutter head A10 is then manually installed onto the filling block A905.

[0062] S300: Drive processing: The hydraulic motor 304 drives the synchronous gear B303, synchronous gear A302 and combination gear 301 to rotate. The two output parts of the combination gear 301 are set to make multiple planetary gears 402 revolve. The revolve of multiple planetary gears 402 drives the fixed support sleeve 601 to perform rotation milling work.

[0063] S400: Cleaning: The surface and interior of the milling unit 5 are cleaned using cleaning tools, and oil maintenance is performed at the same time.

[0064] The embodiments disclosed in this invention are preferred embodiments, but are not limited thereto. Those skilled in the art can easily understand the spirit of this invention based on the above embodiments and make different extensions and variations, but as long as they do not depart from the spirit of this invention, they are all within the protection scope of this invention.

Claims

1. A milling head for road surfacing, characterized by, It comprises a connecting frame (1), a double-end oil cylinder (2), a combined driving structure (3), a planetary outer edge driving mechanism (4) and a milling and digging unit (5). The internal gap of the connecting frame (1) forms a driving operation cavity. The double-end oil cylinder (2) is arranged in the driving operation cavity; the combined driving structure (3) is arranged on one side of the double-end oil cylinder (2) and connected with the driving operation cavity; two planetary outer edge driving mechanisms (4) are symmetrically arranged on the two sides of the double-end oil cylinder (2) in the axial direction; and two milling and digging units (5) are symmetrically arranged on the two sides of the double-end oil cylinder (2) in the axial direction and connected with the connecting frame (1). The double-end oil cylinder (2) is rotationally connected with the milling and digging unit (5). The milling and digging unit (5) comprises equidistant telescopic units (6), a milling and digging fixed sleeve (7), a milling and digging movable sleeve (8), a filling unit (9) and a cutter head A (10). Two equidistant telescopic units (6) are symmetrically arranged on the two sides of the connecting frame (1) and connected with the double-end oil cylinder (2); the milling and digging fixed sleeve (7) is arranged on the side of the equidistant telescopic unit (6) close to the double-end oil cylinder (2); a plurality of milling and digging movable sleeves (8) are sequentially arranged on the movable end of the equidistant telescopic unit (6); a plurality of filling units (9) are hingedly connected to the movable end of the equidistant telescopic unit (6); and a plurality of cutter heads A (10) are arranged on the filling units (9) through bolts B. The stroke work of the double-end oil cylinder (2) causes the equidistant telescopic units (6) to expand to form a flexible milling and digging structure. The return work of the double-end oil cylinder (2) causes the equidistant telescopic units (6) to contract to form a rigid milling and digging structure.

2. The milling head for road construction as set forth in claim 1, wherein Two support seats (101) are sequentially arranged in the connecting frame (1), and the gap between the two support seats (101) forms a driving cavity; an installation groove (102) is formed on the surface of the support seat (101) relative to the axial position of the milling and digging unit (5); and a hooking rotation protrusion (103) is arranged at the end of the connecting frame (1) relative to the axial position of the milling and digging unit (5).

3. The milling head for road construction as set forth in claim 2, wherein The combined driving structure (3) comprises a combined gear (301), a synchronous gear A (302), a synchronous gear B (303) and an oil pressure motor (304). The combined gear (301) is arranged on the double-end oil cylinder (2) through a bearing A; the combined gear (301) is composed of one driving part and two output parts. The synchronous gear A (302) is movably arranged in the driving cavity and connected with the combined gear (301). The synchronous gear B (303) is movably arranged on the side of the synchronous gear A (302) away from the combined gear (301) and connected with the driving cavity; the synchronous gear A (302) is meshingly connected with the combined gear (301) and the synchronous gear B (303). The oil pressure motor (304) is keyed to the synchronous gear B (303) and connected with the support seat (101).

4. The milling head for road construction as set forth in claim 3, wherein The planetary outer edge driving mechanism (4) comprises an auxiliary tooth disc (401) and a planetary gear (402); The auxiliary tooth disc (401) is arranged in the support seat (101) through bolts A; wherein the inner wall of the auxiliary tooth disc (401) is annularly and equidistantly provided with a plurality of meshing teeth A; the gap between the inner wall of the auxiliary tooth disc (401) and the outer wall of the output part constitutes a planetary driving cavity; a plurality of planetary gears (402) are arranged in the planetary driving cavity; and the planetary gears (402) are respectively meshingly connected with the meshing teeth A and the output part.

5. The milling head for road construction as set forth in claim 4, wherein The equidistant telescopic unit (6) comprises fixed support sleeves (601), a first movable sleeve (602), a second movable sleeve (603) and a third movable sleeve (604); The two fixed support sleeves (601) are symmetrically arranged on both sides of the double-acting oil cylinder (2); wherein the inner wall of the fixed support sleeve (601) is symmetrically provided with tooth grooves A (6011) on both sides; The first movable sleeve (602) is arranged in the fixed support sleeve (601); wherein the first movable sleeve (602) is annularly and equidistantly provided with a plurality of tooth grooves B (6021) inside; wherein a plurality of equidistant adjustment gears A (6022) are sequentially hinged on the surface of the first movable sleeve (602) relative to the positions of the tooth grooves A (6011); wherein a bearing B (6023) is arranged on the side of the first movable sleeve (602) close to the double-acting oil cylinder (2); and the first movable sleeve (602) is installed and connected with the double-acting oil cylinder (2) through the bearing B (6023); and the first movable sleeve (602) is rotationally connected with the double-acting oil cylinder (2) through the bearing B (6023); The second movable sleeve (603) is arranged in the first movable sleeve (602); wherein the tooth grooves C (6031) are arranged on the outer surface of the second movable sleeve (603) relative to the positions of the equidistant adjustment gears A (6022); wherein the second movable sleeve (603) is meshingly connected with the fixed support sleeve (601) through the tooth grooves C (6031), the equidistant adjustment gears A (6022) and the tooth grooves A (6011); wherein a plurality of equidistant adjustment gears B (6032) are arranged on the outer surface of the second movable sleeve (603) relative to the positions of the tooth grooves B (6021); The third movable sleeve (604) is arranged in the second movable sleeve (603); wherein the tooth grooves D (6041) are arranged on the outer surface of the third movable sleeve (604) relative to the positions of the equidistant adjustment gears B (6032); wherein the third movable sleeve (604) is meshingly connected with the first movable sleeve (602) through the tooth grooves D (6041) and the equidistant adjustment gears B (6032).

6. The milling head for road construction as set forth in claim 5, wherein The milling fixed sleeve (7) is fixed to the fixed support sleeve (601) through a connecting block (6012), and the milling fixed sleeve (7) is movably arranged on the planetary gear (402) through an extension shaft; the first movable sleeve (602), the second movable sleeve (603) and the third movable sleeve (604) are fixedly provided with a hinge ring block A (609) on the side away from the double-headed oil cylinder (2), and the milling movable sleeve (8) is fixed to the end of the hinge ring block A (609); wherein the surfaces of the milling fixed sleeve (7) and the milling movable sleeve (8) are annularly and equidistantly provided with a plurality of tool bits B.

7. The milling head for road construction as set forth in claim 6, wherein The filling unit (9) comprises a hinge ring block B (901), a first connecting rod (902), a center-keeping connecting rod (903), an auxiliary extension block (904), a filling block A (905) and a filling block B (906); The hinge ring block B (901) is arranged on the side of the hinge ring block A (609) close to the double-headed oil cylinder (2); the gap between the hinge ring block B (901) and the hinge ring block A (609) forms a hinge cavity; The two first connecting rods (902) are symmetrically arranged in the hinge cavity; and a plurality of groups of first connecting rods (902) are annularly and equidistantly arranged in the hinge cavity; wherein the first connecting rod (902) is provided with a triangular extrusion part at the end away from the hinge ring block B (901); The center-keeping connecting rod (903) is hingedly connected to the first connecting rod (902) through a second connecting rod (9031) and a third connecting rod (9032); At least one auxiliary extension block (904) is hingedly connected to the end of the first connecting rod (902); The filling block A (905) is movably arranged on the auxiliary extension block (904); wherein the filling block A (905) is provided with a correction block (9051) at the horizontal position between the two first connecting rods (902); and the correction block (9051) is provided with a plug-in hole matched with the shape of the center-keeping connecting rod (903) in the inside; wherein the filling block B (906) is arranged between two adjacent correction blocks (9051); wherein the surface of the filling block B (906) is provided with four symmetrical misaligned protrusions (9061); and the filling block A (905) is provided with a receiving groove at the position relative to the filling block B (906); wherein the filling block A (905) is provided with an inclined extrusion groove (9052) at the position relative to the receiving groove; wherein the outer edge surface of the filling block A (905) is in a stepped shape; and the outer edge surface of the filling block A (905) comprises a mounting surface, a horizontal surface, an inclined surface and a top surface; wherein the height of the filling block B (906) is the same as the height of the mounting surface; wherein the milling fixed sleeve (7) and the milling movable sleeve (8) are provided with an inner chamfer on the side close to the filling block A (905).

8. The milling head for road construction as set forth in claim 7, wherein Wherein the relative position of the filling unit (9) located in the first movable sleeve (602) is connected with the milling fixed sleeve (7) by spring A, connecting block (6012); wherein one of the relative position of the filling unit (9) located in the second movable sleeve (603) is connected with the first movable sleeve (602) by spring B; wherein one of the relative position of the filling unit (9) located in the third movable sleeve (604) is connected with the second movable sleeve (603) by spring C.

9. The milling head for road construction as set forth in claim 8, wherein The double head oil cylinder (2) stroke movement makes the equidistant telescopic unit (6) drive the milling fixed sleeve (7), several milling movable sleeve (8) equidistant expansion, through spring A, spring B, spring C makes the filling unit (9) radial expansion forms flexible milling structure; the double head oil cylinder (2) return stroke movement makes the equidistant telescopic unit (6) drive the milling fixed sleeve (7), several milling movable sleeve (8) equidistant contraction, so that the filling unit (9) radial folding forms rigid milling structure.

10. The method of using a milling head for paving according to any one of claims 1-9, wherein, Including the following steps: S100: installation process: install the milling head to the excavator operating arm by bolt, nut installation piece; S200: milling adjustment process: If the hard road surface is milled: through the double head oil cylinder (2) return stroke work and in the manual operation auxiliary relative extrusion filling unit (9) to make spring A, spring B, spring C relative contraction, in the first movable sleeve (602) axial return stroke work synchronous makes the first movable sleeve (602), second movable sleeve (603) and third movable sleeve (604) and several milling movable sleeve (8) equidistant contraction, and cooperate with the milling fixed sleeve (7), several milling movable sleeve (8) inner chamfer setting extrusion filling block A (905) continuous contraction, at the same time, using two adjacent filling block A (905) extrusion slot (9052) extrusion misplacement convex (9061) makes the filling block B (906) in the storage groove inside shrinkage misplacement at the same time; when the bit ring block A (609) in turn close to synchronous extrusion compression spring A, spring B, spring C, so that the milling fixed sleeve (7), several milling movable sleeve (8) in turn fit, the first movable sleeve (602), second movable sleeve (603) and third movable sleeve (604) and the fixed support sleeve (601) in turn plug-in; If the road base is milled, the double-head oil cylinder (2) returns to work, which makes the first movable sleeve (602), the second movable sleeve (603) and the third movable sleeve (604) expand at equal intervals, and at the same time, the two first connecting rods (902) distributed above and below rotate, and the triangular part of the first connecting rod (902) is used to press the filling block A (905), and at the same time, the two adjacent filling blocks A (905) are used to press the staggered protrusions (9061) in the extrusion groove (9052) to make the filling block B (906) expand inside the receiving groove, and the filling block B (906) is inserted into the gap between the first movable sleeve (602), the second movable sleeve (603), the third movable sleeve (604) and the fixed support sleeve (601), and the tool bit A (10) is installed on the filling block A (905) by artificial installation; S300: drive processing: drive the synchronous gear B (303), the synchronous gear A (302) and the combination gear (301) to rotate by the oil pressure motor (304), use the two output parts of the combination gear (301) to set to work on multiple planetary gears (402), and make the revolution of multiple planetary gears (402) drive the fixed support sleeve (601) to rotate and mill; S400: cleaning processing: clean the surface and the inside of the milling unit (5) by cleaning tools, and at the same time, carry out oil maintenance treatment.

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