CN112942038B

CN112942038B - Small-size road surface milling machine

Info

Publication number: CN112942038B
Application number: CN202110343953.8A
Authority: CN
Inventors: 潘华维
Original assignee: Jiaxing Taoyuan Machinery Technology Co ltd
Current assignee: Jiaxing Taoyuan Machinery Technology Co ltd
Priority date: 2021-03-31
Filing date: 2021-03-31
Publication date: 2022-04-29
Anticipated expiration: 2041-03-31
Also published as: CN112942038A

Abstract

The invention discloses a small-sized pavement milling machine, which comprises a machine body, an armrest beam, a rear wheel assembly, a front wheel assembly, a motor bottom plate, a milling driving motor, a left side plate, a right side plate, a middle shaft, a milling cutter assembly and a cutter hub baffle plate, wherein the cutter hub baffle plate is fixed on two sides of the milling cutter assembly and is positioned between the milling cutter assembly and a bearing assembly, the cutter hub baffle plate is annular and comprises an annular fixing part, an annular outer dustproof part and an annular inner dustproof part, and the annular outer dustproof part and the annular inner dustproof part are respectively positioned on the outer edge and the inner edge of the annular fixing part. The bearing assembly comprises a bearing dust cover, a bearing small cover and a bearing seat, wherein the bearing dust cover is located at one side close to the milling cutter assembly, the bearing seat is located between the bearing dust cover and the bearing small cover, a working bearing is arranged in the bearing seat, a dust-proof cavity is arranged between the bearing dust cover and the bearing small cover, and an inner dust-proof layer is arranged in the dust-proof cavity.

Description

Small-size road surface milling machine

Technical Field

The invention relates to the technical field of milling machines, in particular to a small pavement milling machine.

Background

The pavement milling machine is mainly used for excavating and renovating asphalt concrete surface courses of highways, town roads, airports, goods yards and the like, can also be used for removing the defects of pavement upheaval, oil wave, reticulate patterns, ruts and the like, and can also be used for excavating pavement pit grooves and grooves, roughening cement pavements and milling staggered surface courses. The pavement milling machine has the advantages of high working efficiency, simple construction process, easy control of milling depth, convenient and flexible operation, good maneuverability, direct recycling of milled old materials and the like, thereby being widely applied to maintenance projects of town roads and highways.

When the milling machine in the prior art is used, dust raised when blades are in contact with the road surface can enter the bearings at two ends of the middle shaft, so that the abrasion consumption of the bearings in the using process is accelerated, and the service life of the bearings is greatly shortened. Therefore, workers need to replace and maintain the bearings more frequently, and great labor cost and material cost are caused.

Disclosure of Invention

The invention aims to provide a small-sized pavement milling machine which can effectively prevent dust on bearings at two ends of a central shaft, reduce the consumption of the bearings after dust enters the bearings and prolong the service life of the bearings. Therefore, the times of replacing and maintaining the bearing in the milling machine are reduced, and the cost is reduced.

The technical purpose of the invention is realized by the following technical scheme: a compact road milling machine comprising: a body; the lower end of the armrest beam is fixed on the rear side wall of the machine body; the rear wheel assembly is arranged at the lower end of the armrest beam; a front wheel assembly provided to a front sidewall of the body; the motor bottom plate is positioned above the machine body; the milling and planing driving motor is fixed at the upper end of the motor bottom plate; the left side plate and the right side plate are respectively fixed on the left side and the right side of the machine body, and bearing assemblies are fixedly arranged in the middle positions of the left side plate and the right side plate; the milling and planing driving motor is driven to rotate by the belt transmission assembly; the milling cutter assembly is arranged on the middle shaft and rotates along with the middle shaft, and is characterized by further comprising cutter hub baffle plates, the cutter hub baffle plates are fixed on two sides of the milling cutter assembly and are positioned between the milling cutter assembly and a bearing assembly, the cutter hub baffle plates are annular and comprise annular fixing portions, annular outer dustproof portions and annular inner dustproof portions, the annular outer dustproof portions and the annular inner dustproof portions are respectively positioned on the outer side edge and the inner side edge of the annular fixing portions, the bearing assembly comprises a bearing dustproof cover, a bearing small cover and a bearing seat, the bearing dustproof cover is positioned on one side close to the milling cutter assembly, the bearing seat is positioned between the bearing dustproof cover and the bearing small cover, a working bearing is arranged in the bearing seat, oil seals are respectively arranged between the bearing dustproof cover and the middle shaft and between the bearing small cover and the middle shaft, and a dustproof cavity is arranged between the bearing dustproof cover and the bearing small cover, an inner dustproof layer is arranged in the dustproof cavity.

The invention is further configured to: the number of the working bearings is more than one, and the working bearings are dustproof bearings.

The invention is further configured to: the inner dust-proof layer is one or the combination of two of a dustproof felt and a graphite ceramic sealing ring.

The invention is further configured to: be equipped with the bottom plate regulating unit between fuselage top and the motor bottom plate, including front side regulation portion and rear side regulation portion, both ends are fixed in front side regulation portion and rear side regulation portion respectively around the motor bottom plate, front side regulation portion and rear side regulation portion homoenergetic make the motor bottom plate carry out position control along milling and planing driving motor's axial direction, front side regulation portion enables the front end of motor bottom plate to carry out altitude mixture control, the front end of motor bottom plate is when carrying out altitude mixture control, rear side regulation portion enables the rear end of motor bottom plate and uses it to rotate as the axle.

The invention is further configured to: the front side regulating part comprises a bottom plate support, a bottom plate regulating shaft, a bottom plate regulating screw sleeve and a bottom plate regulating screw rod, the bottom plate support is fixed at the front side of the machine body, the bottom plate regulating shaft is horizontally arranged, the two ends of the bottom plate regulating shaft are fixed on the floor support, the bottom plate regulating screw sleeve is slidably sleeved on the bottom plate regulating shaft, a first fixing part is arranged between the bottom plate regulating screw sleeve and the bottom plate regulating shaft, the bottom plate regulating screw rod is vertically arranged, the lower end of the bottom plate regulating screw rod is fixed on the bottom plate regulating screw sleeve, a screw rod caulking groove is formed in the motor bottom plate, the upper end of the bottom plate regulating screw rod is embedded in the screw rod caulking groove, the bottom plate regulating screw rod is in threaded connection with an upper fixing nut and a lower fixing nut, and the upper fixing nut and the lower fixing nut are respectively located at the upper side and the lower side of the motor bottom plate.

The invention is further configured to: the rear side regulating part comprises a fixed block, a bottom plate supporting shaft and a sliding block, the quantity of the fixed block is two, the fixed block is fixed on the upper surface of the machine body, the two ends of the bottom plate supporting shaft are respectively fixed on the fixed block on the two sides in a rotating mode, the quantity of the sliding block is more than two, the sliding block is arranged on the bottom plate supporting shaft in a sliding mode, the upper end of the sliding block is fixedly connected with the lower surface of the motor bottom plate, and a second fixing part is arranged between the sliding block and the bottom plate supporting shaft.

The invention is further configured to: the front wheel assembly comprises a front wheel support, a front wheel shaft and a fastening bolt, an installation caulking groove is formed in the lower side of the front wheel support, two ends of the front wheel shaft are embedded in the installation caulking groove, installation notches matched with the installation caulking groove are formed in two sides of the front wheel shaft, a front wheel is arranged on the front wheel shaft, and the fastening bolt is fixed at one end of the front wheel shaft to enable the front wheel shaft to be fixed in the installation caulking groove.

The invention is further configured to: the milling cutter assembly comprises a central shaft sleeve, a cutter hub side plate and a hexagonal sleeve, wherein the central shaft is inserted into the central shaft sleeve, the cross section of the part of the central shaft, which is positioned in the central shaft sleeve, is hexagonal, the hexagonal sleeve is positioned between the central shaft and the central shaft sleeve and fixes the central shaft and the central shaft sleeve, the cutter hub side plate is sleeved on the hexagonal sleeve, and the inner side wall of the cutter hub side plate is tightly attached to the end part of the central shaft sleeve.

The invention is further configured to: the milling cutter assembly comprises saw blades and gaskets, the saw blades and the gaskets are arranged on the central shaft at intervals, and the adjacent saw blades and the gaskets are tightly attached.

The invention is further configured to: the rear side of fuselage is opened and is equipped with the dust absorption mouth, the inboard of dust absorption mouth is equipped with dust absorption board and inserts the frame, dust absorption board inserts the interpolation and is equipped with and stops the dust guard of dust absorption mouth, the connection can be dismantled through bolt and fuselage to the one end of dust guard, the fuselage both ends near left side board and right side board all are equipped with the rectangle locating piece more than two, the rectangle locating hole has all been seted up on left side board and the right side board, the cooperation of rectangle locating piece is inserted and is located in the rectangle locating hole.

Compared with the prior art, the invention has the beneficial effects that: 1. the one end that the outer dustproof portion of annular kept away from the sword hub curb plate extends to the position at bearing frame place, wraps up bearing shield wherein to and can effectively prevent the position that the dust from getting into between sword hub curb plate and the bearing shield. One end of the dustproof portion in the ring away from the cutter hub side plate extends to a position close to the outer wall of the bearing dustproof cover, and the dustproof portion in the ring can effectively prevent dust from entering the position of the oil seal. 2. The oil seal prevents dust from entering the interior of the bearing assembly through the gap between the bottom bracket axle and the bearing assembly. The inner dust barrier can block dust entering the interior of the bearing assembly from continuing inwardly into the working bearing. 3. The front wheel axle can not rotate in the installation caulking groove after inlaying through the installation breach and locating in the installation caulking groove, in addition, can realize quick installation and dismantlement through inlaying the mode installation front wheel axle of establishing, makes things convenient for the later stage to change and maintain the front wheel. 4. The bottom plate adjusting unit can adjust the front position, the rear position, the height position and the like of the motor bottom plate, so that the position and the tightness of a belt transmission assembly between an output shaft of the milling driving motor and the middle shaft are in a better state. 5. When the number of the working bearings is multiple, when one of the working bearings is worn and damaged, the other working bearings can still be used continuously, so that workers do not need to immediately maintain the milling machine.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of a bearing assembly of the present invention;

FIG. 3 is a cross-sectional view of a bearing assembly of the present invention;

FIG. 4 is a side view of the present invention;

FIG. 5 is a sectional view taken along the line G-G of FIG. 4 in accordance with the present invention;

FIG. 6 is a schematic view of the construction of the cutter hub baffle of the present invention;

FIG. 7 is a schematic view of the front adjusting part according to the present invention;

FIG. 8 is a schematic view of the rear adjustment part according to the present invention;

FIG. 9 is a cross-sectional view taken in the direction H-H of FIG. 4 in accordance with the present invention;

FIG. 10 is a schematic view of the bottom structure of the present invention;

FIG. 11 is a schematic view of the construction of a saw blade and shim of the present invention;

FIG. 12 is a schematic view of the mounting of the front wheel assembly of the present invention.

The reference numbers in the figures mean: 1. a body; 2. an armrest beam; 3. a rear wheel assembly; 4. a front wheel assembly; 5. a motor base plate; 6. milling and planing a driving motor; 7. a left side plate; 8. a right side plate; 9. a bearing assembly; 10. a middle shaft; 11. a milling cutter assembly; 12. a cutter hub baffle plate; 13. a ring-shaped fixing portion; 14. an annular outer dust-proof portion; 15. an annular inner dust-proof portion; 16. a bearing dust cover; 17. a small bearing cover; 18. a bearing seat; 19. a working bearing; 20. oil sealing; 21. a dust-proof cavity; 22. a front-side adjusting section; 23. a rear-side adjusting section; 24. a base plate bracket; 25. a bottom plate adjustment shaft; 26. a bottom plate adjusting thread bushing; 27. a bottom plate adjusting screw rod; 28. a first fixing part; 29. a lead screw caulking groove; 30. an upper fixing nut; 31. a lower fixing nut; 32. a fixed block; 33. a bottom plate support shaft; 34. a slider; 35. a second fixing part; 36. a front wheel bracket; 37. a front wheel axle; 38. fastening a bolt; 39. installing an embedding groove; 40. a central shaft sleeve; 41. a cutter hub side plate; 42. a hexagonal sleeve; 43. a dust absorption plate inserting frame; 44. a dust guard; 45. a rectangular positioning block; 46. a saw blade; 47. and (7) a gasket.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

The present invention is explained below with reference to fig. 1 to 12.

As shown in fig. 1 and 10, a small road milling machine includes a machine body 1, and in this embodiment, the machine body 1 includes a front plate, a rear plate, and a top plate. The middle position of the back plate is provided with a dust collection port, one side of the dust collection port close to the inside of the machine body 1 is provided with a dust collection plate insertion frame 43, and slots are formed between the left side and the right side of the dust collection plate insertion frame 43 and the back plate. A dust blocking plate 44 for blocking a dust suction port is inserted in the dust suction plate insertion frame 43, the left end and the right end of the dust blocking plate 44 are respectively inserted in the slots, and one end of the dust blocking plate 44 is detachably connected with the machine body 1 through a bolt. When the milling machine is used for processing wet road surfaces, the raised dust is less, and in addition, the wet cement is easy to cause the blockage of the dust suction port, so the dust baffle plate 44 needs to be fixed in the dust suction plate inserting frame 43 to block the dust suction port, and the dust suction function is stopped. When the dust collection function is needed, the bolts for fixing the dust blocking plate 44 are only needed to be disassembled, and the dust blocking plate 44 is taken out from the dust collection plate inserting frame 43.

As shown in fig. 1, an armrest beam 2 is disposed at a rear side position of a fuselage 1, the armrest beam 2 is disposed in an inclined manner, a lower end of the armrest beam 2 is fixed to a rear side wall of the fuselage 1 by a bolt, and an armrest for operation is disposed at an upper end of the armrest beam 2. The operator controls the advancing, steering and the like of the milling machine through the armrest beam 2. The lower extreme position of handrail roof beam 2 is provided with rear wheel subassembly 3, and rear wheel subassembly 3 includes two rear wheels of coaxial setting, and the interval between two rear wheels slightly is greater than the width of fuselage 1 to provide better stability.

As shown in fig. 1, 4, 9 and 12, a front wheel assembly 4 is provided at a middle position of a lower end of the front plate, and the front wheel assembly 4 and two rear wheels form a three-point support, so that the body 1 and components provided on the body 1 can be stably moved. The front wheel assembly 4 comprises a front wheel bracket 36, a front wheel shaft 37 and a fastening bolt 38, wherein an installation caulking groove 39 is formed in the lower side of the front wheel bracket 36, and two ends of the front wheel shaft 37 are embedded in the installation caulking groove 39. Front axle 37's both sides all are equipped with installation caulking groove 39 complex installation breach, and front axle 37 inlays through the installation breach and locates and can not rotate in installation caulking groove 39 after in installation caulking groove 39, and in addition, front axle 37 can realize installing fast and dismantling through inlaying the mode of establishing, makes things convenient for the later stage to change and maintain the front wheel. The front wheel shaft 37 is provided with front wheels rotatably connected to the middle of the front wheel shaft 37. The fastening bolt 38 is fixed to one end of the front axle 37 so that the front axle 37 is fixed in the mounting insert groove 39, preventing the front axle 37 from slipping out of the mounting insert groove 39.

As shown in fig. 1, a motor bottom plate 5 is disposed above the machine body 1, and a milling driving motor 6 is fixed to an upper end of the motor bottom plate 5. A bottom plate adjusting unit is arranged between the top of the machine body 1 and the motor bottom plate 5 and can adjust the front position, the back position and the height position of the motor bottom plate 5, so that the position and the tightness of a belt transmission assembly between an output shaft of the milling driving motor 6 and the middle shaft 10 are in a better state. The base plate adjusting unit includes a front adjusting portion 22 and a rear adjusting portion 23, and the front and rear ends of the motor base plate 5 are fixed to the front adjusting portion 22 and the rear adjusting portion 23, respectively. The front adjusting part 22 and the rear adjusting part 23 can adjust the position of the motor base plate 5 along the axial direction of the milling driving motor 6, so that the belt pulley on the output shaft of the milling driving motor 6 and the belt pulley on the middle shaft 10 are in the same vertical plane, and the belt mounted on the two belt pulleys is not in an inclined state. The front-side adjusting portion 22 can adjust the height of the front end of the motor base plate 5, and the rear-side adjusting portion 23 can rotate the rear end of the motor base plate 5 about the front end of the motor base plate 5. When the motor bottom plate 5 rotates, the distance between the output shaft of the milling driving motor 6 and the middle shaft 10 is correspondingly changed, so that the adjustment is carried out according to the tightness of the belt, and the belt is in a better transmission state.

As shown in fig. 1 and 7, the front-side adjusting portion 22 includes a base bracket 24, a base adjusting shaft 25, a base adjusting screw housing 26, and a base adjusting screw 27. The bottom plate bracket 24 is fixed on the front side of the machine body 1 by welding, the bottom plate adjusting shaft 25 is horizontally arranged, and two ends of the bottom plate adjusting shaft are fixed on the floor bracket. The bottom plate adjusting screw sleeve 26 is slidably sleeved on the bottom plate adjusting shaft 25, and the bottom plate adjusting screw sleeve 26 can move along the length direction of the bottom plate adjusting shaft 25. Be equipped with mounting 28 between bottom plate adjusting screw sleeve 26 and the bottom plate regulating spindle 25, mounting 28 is the bolt in this embodiment, and bolt threaded connection is on bottom plate adjusting screw sleeve 26, and the staff supports tightly in bottom plate regulating spindle 25 with the one end of bolt after the bolt tightening, and bottom plate adjusting screw sleeve 26 is fixed in on bottom plate regulating spindle 25 and can't remove again this moment. The bottom plate adjusting screw rod 27 is vertically arranged, and the lower end of the bottom plate adjusting screw rod 27 is fixed on the bottom plate adjusting screw sleeve 26. The motor bottom plate 5 is provided with a screw rod caulking groove 29, and the upper end of the bottom plate adjusting screw rod 27 is embedded in the screw rod caulking groove 29. An upper fixing nut 30 and a lower fixing nut 31 are threadedly connected to the bottom plate adjusting screw 27, the upper fixing nut 30 and the lower fixing nut 31 are respectively located at the upper side and the lower side of the motor bottom plate 5, and a worker tightens the upper fixing nut 30 and the lower fixing nut 31 respectively against the upper surface and the lower surface of the motor bottom plate 5, so that the bottom plate adjusting screw 27 is fixed in the screw insertion groove 29. When the operator moves the base plate adjusting screw 26 on the base plate adjusting shaft 25, the base plate adjusting screw 27 drives the motor base plate 5 to move together.

As shown in fig. 1 and 8, the rear-side adjusting portion 23 includes two fixing blocks 32, a bottom plate supporting shaft 33, and a slider 34, the two fixing blocks 32 are respectively fixed to both sides of the upper surface of the body 1, and the fixing blocks 32 are fixed to the upper surface of the body 1 by bolts. Both ends of bottom plate back shaft 33 are the rotatory fixed block 32 that is fixed in both sides respectively, and the quantity of slider 34 is more than two and slide and locate on bottom plate back shaft 33, and the quantity of slider 34 is two in this embodiment. The upper ends of the sliders 34 are fixedly connected with the lower surface of the motor base plate 5, and when the position of the motor base plate 5 is adjusted, the two sliders 34 move on the base plate supporting shaft 33 simultaneously. Be equipped with two fixed parts 35 between slider 34 and the bottom plate support shaft 33, two fixed part 35 are the bolt in this embodiment, and bolt threaded connection is on slider 34, and the staff supports tightly in bottom plate support shaft 33 with the one end of bolt after screwing up the bolt, and slider 34 is fixed in on bottom plate support shaft 33 and can't remove again this moment.

As shown in fig. 1, 4 and 5, the left side plate 7 and the right side plate 8 are respectively fixed to the left and right sides of the body 1 by bolts, and through holes for mounting the bearing assemblies 9 are formed in the left side plate 7 and the right side plate 8. Fuselage 1 all is equipped with the rectangle locating piece 45 more than two near the both ends of left side board 7 and right side board 8, has all seted up the rectangle locating hole on left side board 7 and the right side board 8, and the cooperation of rectangle locating piece 45 is inserted and is located the rectangle locating hole. After the rectangular positioning block 45 is inserted into the rectangular positioning hole, the circle centers of the through holes for mounting the bearing assembly 9 on the left side plate 7 and the right side plate 8 can be ensured to be aligned, so that the mounting position of the center shaft 10 is more accurate.

As shown in fig. 2, 3 and 5, a bearing assembly 9 is fixedly arranged at the middle position of each of the left side plate 7 and the right side plate 8, and the bearing assembly 9 is used for mounting a middle shaft 10. The bearing assembly 9 comprises a bearing dust cover 16, a bearing small cover 17 and a bearing seat 18, wherein the bearing dust cover 16 is positioned at one side close to the inside of the machine body 1, the bearing seat 18 is positioned between the bearing dust cover 16 and the bearing small cover 17, and the bearing dust cover 16, the bearing small cover 17 and the bearing seat 18 form a shell. The bearing seat 18 is internally provided with more than one working bearing 19, the number of the working bearings 19 is more than one, in the embodiment, the number of the working bearings 19 is two, when one of the working bearings is worn and damaged, the other working bearing 19 can still be continuously used, and therefore workers do not need to immediately maintain the milling machine. The working bearing 19 is a dustproof bearing which is a bearing with a dustproof cover and has certain dustproof capacity. Oil seals 20 are arranged between the bearing dust cover 16 and the middle shaft 10 and between the small bearing cover 17 and the middle shaft 10, and the oil seals 20 can prevent dust from entering the inside of the bearing assembly 9 through the gap between the middle shaft 10 and the bearing assembly 9. A dustproof cavity 21 is arranged between the bearing dustproof cover 16 and the bearing small cover 17, an internal dustproof layer is arranged in the dustproof cavity 21, and the internal dustproof layer can block dust entering the inside of the bearing assembly 9 and prevent the dust from entering the working bearing 19 continuously. The inner dust-proof layer is one or the combination of two of a dustproof felt and a graphite ceramic sealing ring, the dustproof felt is compact in structure, small in pore and good in sealing performance. The graphite ceramic sealing ring has the advantages of high temperature wear resistance, high toughness and good sealing performance.

As shown in fig. 5 and 11, a middle shaft 10 is disposed between the bearing assemblies 9 on both sides, and both ends of the middle shaft 10 are respectively fixed in the bearing assemblies 9 on both left and right sides. A belt transmission assembly is arranged between an output shaft of the milling driving motor 6 and the middle shaft 10, and the milling driving motor 6 drives the middle shaft 10 to rotate through the belt transmission assembly. The middle shaft 10 is provided with a milling cutter assembly 11 rotating along with the middle shaft, and when the milling machine is in a working state, blades in the milling cutter assembly 11 are in contact with the road surface to mill the road surface. The milling cutter assembly 11 includes a central shaft sleeve 40, a cutter hub side plate 41 and a hexagonal sleeve 42, wherein the central shaft 10 is inserted into the central shaft sleeve 40, and the cross section of the central shaft 10 in the central shaft sleeve 40 is hexagonal. The hexagonal sleeve 42 is positioned between the middle shaft 10 and the central shaft sleeve 40 and fixes the middle shaft 10 and the central shaft sleeve 40, the middle shaft 10 and the central shaft sleeve 40 are fixedly connected through the hexagonal sleeve 42, the processing difficulty of the central shaft sleeve 40 can be reduced, a hollow part with an inner hexagonal section does not need to be processed in the central shaft sleeve 40, and therefore the processing and manufacturing cost is reduced. The cutter hub side plate 41 is sleeved on the hexagonal sleeve 42, the inner side wall of the cutter hub side plate 41 is tightly attached to the end portion of the central shaft sleeve 40, and the cutter hub side plate 41 can prevent the central shaft sleeve 40 from shifting when the milling machine works, so that the stability of the milling cutter assembly 11 during working is ensured. In addition, milling cutter assembly 11 may also include saw blades 46 and spacers 47, where saw blades 46 and spacers 47 are arranged on central shaft 10 at intervals, and adjacent saw blades 46 and spacers 47 are tightly attached to each other. When the central shaft 10 rotates, the saw blade 46 is driven to rotate, and the outer edge of the saw blade 46 is contacted with the ground, so that the ground is processed.

As shown in fig. 5 and 6, the milling cutter assembly 11 is provided with a cutter hub apron 12 on both sides, and the cutter hub apron 12 is located between the milling cutter assembly 11 and the bearing assembly 9. The cutter hub baffle 12 is annular in shape and includes an annular fixed portion 13, an annular outer dust prevention portion 14, and an annular inner dust prevention portion 15. The annular fixing portion 13 is fixedly connected to the hub side plate 41 by bolts, and the annular outer dust-proof portion 14 and the annular inner dust-proof portion 15 are respectively located at the outer edge and the inner edge of the annular fixing portion 13. The annular outer dustproof portion 14 is located outside the bearing assembly, and one end, far away from the cutter hub side plate 41, of the annular outer dustproof portion 14 extends to the position where the bearing seat 18 is located, so that the bearing dustproof cover 16 is wrapped in the annular outer dustproof portion, and therefore dust can be effectively prevented from entering the position between the cutter hub side plate 41 and the bearing dustproof cover 16. The annular inner dustproof portion 15 is located on the outer side of the oil seal 20, one end, away from the cutter hub side plate 41, of the annular inner dustproof portion 15 extends to a position close to the outer wall of the bearing dustproof cover 16, and the annular inner dustproof portion 15 can effectively prevent dust from entering the position of the oil seal 20.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and those modifications and variations assumed in the above are also considered to be within the protective scope of the present invention.

Claims

1. A compact road milling machine comprising:

a fuselage (1);

the lower end of the armrest beam (2) is fixed on the rear side wall of the machine body (1);

a rear wheel assembly (3) provided at a lower end position of the armrest beam (2);

a front wheel assembly (4) provided on a front side wall of the body (1);

a motor bottom plate (5) located above the machine body (1);

the milling and planing driving motor (6) is fixed at the upper end of the motor bottom plate (5);

the left side plate (7) and the right side plate (8) are respectively fixed on the left side and the right side of the machine body (1), and bearing assemblies (9) are fixedly arranged in the middle positions of the left side plate and the right side plate;

the two ends of the middle shaft (10) are respectively fixed in the bearing assemblies (9) on the left side and the right side, a belt transmission assembly is arranged between an output shaft of the milling driving motor (6) and the middle shaft (10), and the milling driving motor (6) drives the middle shaft (10) to rotate through the belt transmission assembly;

a milling cutter component (11) which is arranged on the middle shaft (10) and rotates along with the middle shaft (10),

the method is characterized in that:

the milling cutter assembly further comprises a cutter hub baffle plate (12) which is fixed on two sides of the milling cutter assembly (11) and located between the milling cutter assembly (11) and the bearing assembly (9), the cutter hub baffle plate (12) is annular and comprises an annular fixing portion (13), an annular outer dustproof portion (14) and an annular inner dustproof portion (15), the annular outer dustproof portion (14) and the annular inner dustproof portion (15) are located on the outer edge and the inner edge of the annular fixing portion (13) respectively, the annular outer dustproof portion (14) is located on the outer side of the bearing assembly (9), one end, away from a cutter hub side plate (41), of the annular outer dustproof portion (14) extends to the position where the bearing seat (18) is located, the bearing dustproof cover (16) is wrapped in the annular inner dustproof portion (15), the end, away from the cutter hub side plate (41), of the annular inner dustproof portion (15) extends to the position close to the outer wall of the bearing cover (16), bearing assembly (9) are including bearing shield (16), bearing tegillum (17) and bearing frame (18), bearing shield (16) are located and are close to one side of milling cutter subassembly (11), bearing frame (18) are located between bearing shield (16) and bearing tegillum (17), be equipped with work bearing (19) in bearing frame (18), all be equipped with oil blanket (20) between bearing shield (16) and axis (10), between bearing tegillum (17) and axis (10), be equipped with dust-proof chamber (21) between bearing shield (16) and the bearing tegillum (17), be equipped with inside dust layer in dust-proof chamber (21).

2. A small road milling machine as claimed in claim 1, wherein: the number of the working bearings (19) is more than one, and the working bearings (19) are dustproof bearings.

3. A small road milling machine as claimed in claim 1, wherein: the inner dust-proof layer is one or the combination of two of a dustproof felt and a graphite ceramic sealing ring.

4. A small road milling machine as claimed in claim 1, wherein: be equipped with the bottom plate regulating unit between fuselage (1) top and motor bottom plate (5), including front side regulation portion (22) and rear side regulation portion (23), both ends are fixed in front side regulation portion (22) and rear side regulation portion (23) respectively around motor bottom plate (5), front side regulation portion (22) and rear side regulation portion (23) homoenergetic make motor bottom plate (5) carry out position control along the axial direction of milling and planing driving motor (6), front side regulation portion (22) can make the front end of motor bottom plate (5) carry out altitude mixture control, when the front end of motor bottom plate (5) was carrying out altitude mixture control, rear side regulation portion (23) can make the rear end of motor bottom plate (5) use it to rotate as the axle.

5. A small road milling machine as claimed in claim 4, wherein: the front side adjusting part (22) comprises a bottom plate support (24), a bottom plate adjusting shaft (25), a bottom plate adjusting screw sleeve (26) and a bottom plate adjusting screw rod (27), the bottom plate support (24) is fixed on the front side of the machine body (1), the bottom plate adjusting shaft (25) is horizontally arranged, two ends of the bottom plate adjusting shaft are fixed on the floor support, the bottom plate adjusting screw sleeve (26) is sleeved on the bottom plate adjusting shaft (25) in a sliding manner, a fixing part I (28) is arranged between the bottom plate adjusting screw sleeve (26) and the bottom plate adjusting shaft (25), the bottom plate adjusting screw rod (27) is vertically arranged, the lower end of the bottom plate adjusting screw rod (27) is fixed on the bottom plate adjusting screw sleeve (26), a screw rod caulking groove (29) is formed in the motor bottom plate (5), the upper end of the bottom plate adjusting screw rod (27) is embedded in the screw rod caulking groove (29), and an upper fixing nut (30) and a lower fixing nut (31) are connected on the bottom plate adjusting screw rod (27) in a threaded manner, the upper fixing nut (30) and the lower fixing nut (31) are respectively positioned on the upper side and the lower side of the motor bottom plate (5).

6. A small road milling machine as claimed in claim 5, wherein: rear side regulation portion (23) are including fixed block (32), bottom plate back shaft (33) and slider (34), the quantity of fixed block (32) is two and is fixed in the both sides of fuselage (1) upper surface respectively, the both ends of bottom plate back shaft (33) are rotatory respectively and are fixed in on fixed block (32) of both sides, the quantity of slider (34) is more than two and slides and locate on bottom plate back shaft (33), the upper end of slider (34) and the lower fixed surface of motor bottom plate (5) are connected, be equipped with mounting two (35) between slider (34) and bottom plate back shaft (33).

7. A small road milling machine as claimed in claim 1, wherein: the front wheel assembly (4) comprises a front wheel support (36), a front wheel shaft (37) and fastening bolts (38), an installation caulking groove (39) is formed in the lower side of the front wheel support (36), two ends of the front wheel shaft (37) are embedded in the installation caulking groove (39), installation notches matched with the installation caulking groove (39) are formed in two sides of the front wheel shaft (37), front wheels are arranged on the front wheel shaft (37), and the front wheel shaft (37) is fixed in the installation caulking groove (39) through the fastening bolts (38) fixed at one end of the front wheel shaft (37).

8. A small road milling machine as claimed in claim 1, wherein: the milling cutter assembly (11) comprises a central shaft sleeve (40), a cutter hub side plate (41) and a hexagonal sleeve (42), the central shaft (10) is inserted into the central shaft sleeve (40), the cross section of the part, located in the central shaft sleeve (40), of the central shaft (10) is hexagonal, the hexagonal sleeve (42) is located between the central shaft (10) and the central shaft sleeve (40) and fixes the central shaft (10) and the central shaft sleeve (40), the cutter hub side plate (41) is sleeved on the hexagonal sleeve (42), and the inner side wall of the cutter hub side plate (41) is tightly attached to the end portion of the central shaft sleeve (40).

9. A small road milling machine as claimed in claim 1, wherein: the milling cutter assembly comprises saw blades and gaskets, the saw blades and the gaskets are arranged on the central shaft at intervals, and the adjacent saw blades and the gaskets are tightly attached.

10. A small road milling machine as claimed in claim 1, wherein: the rear side of fuselage (1) is opened and is equipped with the dust absorption mouth, the inboard of dust absorption mouth is equipped with dust absorption board and inserts frame (43), dust absorption board inserts frame (43) interpolation and is equipped with and stops the dust board (44) of dust absorption mouth, the one end of dust board (44) is passed through bolt and fuselage (1) and can be dismantled the connection, fuselage (1) both ends near left side board (7) and right side board (8) all are equipped with rectangle locating piece (45) more than two, the rectangle locating hole has all been seted up on left side board (7) and right side board (8), rectangle locating piece (45) cooperation is inserted and is located in the rectangle locating hole.