CN210132649U - A geotechnical rotary milling device - Google Patents

Abstract

The utility model discloses a rotatory milling device of ground, including milling the plane room, transmission shaft and vibration axle, the transmission shaft both ends are passing through the transmission bearing and are milling the lateral wall of plane room, and the vibration axle both ends are passed through the vibration bearing and are supported in the transmission shaft, and the epaxial eccentric block that is fixed with of vibration. An in-shaft vibration excitation device is added in a milling rotor structure of a milling machine, under vibration excitation, a cutter and asphalt concrete are kept in a vibration state with certain frequency and amplitude in the contact process, the impact energy is increased through vibration, the energy loading mode is changed, the vibration state of the cutter enables the cutter to have stronger impact damage effect on the deflection of the asphalt concrete at the contact position, and the cutter has a larger damage range compared with the asphalt concrete in a non-vibration state. The device can be used in milling machines and other rotary milling device mechanical equipment.

Description

A geotechnical rotary milling device

technical field

The utility model belongs to the technical field of engineering machinery, in particular to a rotary milling device for rock and soil.

Background technique

The rotary multi-tool milling device is widely used in geotechnical excavation, road milling, coal cutting, underwater mining, and continuous mining machinery. During the process, the tool cuts into and cuts out successively to complete the milling operation. This type of machine faces a wide variety of operating objects, and the properties of the material to be cut are different. Reducing the milling resistance and milling energy consumption, and improving the milling efficiency are the core goals pursued by the design of this type of machine.

SUMMARY OF THE INVENTION

In order to reduce the milling resistance and milling specific energy consumption, and improve the milling efficiency, a vibration device is added on the basis of pure mechanical cutting. To improve the efficiency of the rotary milling unit.

In order to achieve the above purpose, the geotechnical rotary milling device of the present invention comprises a milling chamber, a transmission shaft and a vibration shaft, both ends of the transmission shaft are supported on the side wall of the milling chamber through transmission bearings, and The vibration bearing is supported in the transmission shaft, and an eccentric block is fixed on the vibration shaft.

Further, both ends of the vibration shaft are provided with vibration bearings, wherein the inner ring of the vibration bearing at one end is fixed to the vibration bearing pressure plate through the shaft shoulder, the vibration bearing pressure plate is fixedly connected to the vibration shaft, and the outer ring of the vibration bearing at this end is connected to the vibration bearing. The sleeve is fixedly connected; the inner ring of the vibration bearing at the other end is fixedly connected with the vibration bearing retaining ring, the vibration bearing retaining ring is fixedly connected with the vibration shaft, and the outer ring of the vibration bearing at this end is fixedly connected through the vibration bearing sleeve and the vibration bearing end cover.

Further, the outer wall of the vibration shaft is connected with the eccentric block through eccentric bolts.

Further, the inner wall of the eccentric block is in close contact with the outer wall of the vibration shaft.

Further, the vibration shaft is connected with the output shaft of the motor through a coupling.

Further, the motor is fixed on the milling chamber through the motor connecting plate.

Further, a transmission bearing end cover is fixed outside the transmission bearing, and the transmission bearing end cover is fixed on the milling chamber by bolts.

Further, the damping block is fixed on the milling chamber by fixing bolts.

Further, the transmission shaft is connected with the milling drum through the rotor connecting plate, and a plurality of milling cutters are fixed on the milling drum.

Compared with the prior art, the present utility model has at least the following beneficial technical effects. An in-shaft vibration excitation device is added to the transmission shaft of the milling machine for milling the rotor structure. In the vibration state of a certain frequency and amplitude, the vibration increases the impact energy and changes the energy loading method. The vibration state of the tool makes the vibration impact damage of the asphalt concrete at the contact point stronger, which is more effective than the asphalt concrete in the non-vibration state. large damage area. It can be used in milling machines and other rotary milling machines.

Further, the vibration bearings are arranged at both ends of the vibration shaft, the inner ring of the vibration bearing is fixedly connected to the vibration bearing pressure plate or the vibration bearing retaining ring through the shaft shoulder, and the outer ring of the vibration bearing is fixedly connected through the vibration bearing sleeve and the vibration bearing end cover, and the vibration The bearing end cover and the transmission shaft are fixedly connected by bolts. The vibration shaft is axially limited by the vibration bearing pressure plate, the vibration bearing retaining ring and the vibration bearing end cover. The function of the vibration bearing sleeve is to fix the axial position of the two vibration bearing outer rings to prevent axial movement. Improve axial stability.

Further, the outer wall of the vibration shaft is connected with an eccentric block by bolts, so that the eccentric block can be easily disassembled or replaced.

Further, the inner wall of the eccentric block is closely attached to the outer wall of the vibration shaft, which improves the stability of the vibration shaft.

Further, a transmission bearing end cover is fixed outside the transmission bearing, and the transmission bearing end cover is fixed on the milling chamber by bolts to protect the transmission bearing and improve the service life of the transmission bearing.

Description of drawings

1 is an overall cross-sectional view of the vibration excitation device of the present utility model;

2 is an overall appearance view of the vibration excitation device of the present utility model;

Fig. 3 vibrating shaft structure diagram of the present utility model;

Figure 4 is a cross-sectional view of the transmission shaft of the present utility model;

FIG. 5 is an overall cross-sectional view of the vibration excitation device of the present invention;

In the drawings: 1-motor; 2-coupling; 3-eccentric bolt; 4-vibration shaft; 5-eccentric block; 6-vibration bearing; 7-vibration bearing pressure plate; 8-vibration bearing retaining ring; 9- Compression bolt; 10-vibration bearing sleeve; 11-transmission shaft; 12-rotor plate; 13-milling drum; 14-milling cutter; 15-vibration bearing end cover; 16-transmission bearing; 17-transmission bearing end cover ; 18-milling chamber; 19-shock block; 20-fixing bolts.

Detailed ways

The present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "horizontal", "upper", "lower", "front", "rear", "left", "right", The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility. The novel and simplified description does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as "first" or "second" may expressly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "plurality" means two or more. In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a connectable connection. Detachable connection, or integral connection; may be mechanical connection or electrical connection; may be direct connection, or indirect connection through an intermediate medium, or internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

1 and 3, a geotechnical rotary milling device includes a motor 1, a coupling 2, an eccentric bolt 3, a vibration shaft 4, an eccentric block 5, a vibration bearing 6, a vibration bearing pressure plate 7, and a vibration bearing retaining ring 8 , compression bolt 9, vibration bearing sleeve 10, transmission shaft 11, rotor plate 12, milling drum 13, milling cutter 14, vibration bearing end cover 15, transmission bearing 16, transmission bearing end cover 17, milling chamber 18, Damping block 19 and fixing bolt 20.

Referring to FIG. 2 , the motor 1 is used as a power source for the vibration excitation device, and the motor 1 and the vibration shaft 4 are connected through a coupling 2 to transmit power. The casing of the motor 1 is fixedly connected with the transmission bearing end cover 17 through bolts, and the transmission bearing end cover 17 is fixed on the side wall of the milling chamber 18 , so that the motor 1 is fixed on the milling chamber 18 . Both ends of the vibration shaft 4 are respectively supported in the transmission shaft 11 through two vibration bearings 6 .

3, the outer peripheral surface of the vibration shaft 4 is connected with an eccentric block 5 through an eccentric bolt 3, the eccentric block 5 is an arc-shaped piece, two bolt holes are provided at both ends of the vibration shaft 4, and the inner ring of the vibration bearing 6 is arranged on the vibration shaft. 4 At both ends, the inner ring of the vibration bearing 6 on the left is fixed with the vibration bearing pressure plate 7 through the shaft shoulder, the vibration bearing pressure plate 7 and the vibration shaft 4 are connected by the compression bolt 9 and the bolt hole, and the outer ring of the vibration bearing 6 on the left side is connected Fixed with the vibration bearing sleeve 10, the vibration bearing sleeve 10 and the vibration bearing end cover 15 are fixedly connected by bolts. The inner ring of the right vibration bearing 6 is fixed by the shaft shoulder and the vibration bearing retaining ring 8, the vibration bearing retaining ring 8 and the vibration shaft 4 are connected by pressing bolts 9 and bolt holes, and the outer ring of the right vibration bearing 6 is connected by the vibration bearing sleeve 10 and the vibration bearing end cover 15 are fixed. The function of the vibration bearing sleeve 10 is to fix the axial position of the outer rings of the two vibration bearings to prevent axial movement and improve the axial stability. The vibration bearing end cover 15 is fixedly connected with the transmission shaft 11 by bolts. The transmission bearings 16 are arranged at both ends of the transmission shaft 11 , the inner ring of which is connected to the transmission shaft 11 , and the outer ring is connected to the side wall of the milling chamber 18 . The rotor receiving plate 12 is arranged between the milling drum 13 and the transmission shaft 11 , and the two ends of the rotor receiving plate 12 are respectively connected with the milling drum 13 and the transmission shaft 11 by bolts. Several milling cutters 14 are spirally welded on the milling drum 13, and the entire milling device is placed in the milling chamber 18. The milling chamber and the external frame are connected by a shock absorbing block 19, and the shock absorbing block 19 is fixed on the milling machine by fixing bolts 20. On the planing chamber, the shock-absorbing block 19 is arranged to reduce the influence of the external frame of the exciting force, and the shock-absorbing block 19 is a rubber shock-absorbing block. The milling cutter 14 adopts a bullet-type cutter.

Referring to FIG. 4 , the transmission shaft 11 is a hollow shaft, the inner part of the transmission shaft 11 is provided with a stepped hole, the outer peripheral surface of the transmission 11 is provided with a first connecting protrusion, the first connecting protrusion is evenly provided with a number of threaded holes, and the first connecting protrusion is A plurality of threaded holes are arranged on the rotor receiving plate 12, and the transmission 11 and the rotor receiving plate 12 are connected by threaded holes and bolts. 1, the inner wall of the milling drum 13 is provided with a second connecting protrusion, the second connecting protrusion is provided with a number of threaded holes, the second connecting protrusion and the milling drum 13 are connected by threaded holes and bolts.

The working process of a geotechnical rotary milling device is as follows:

The motor 1 drives the vibration shaft 4 to rotate. When the road vibration milling machine works, the vibration shaft 4 drives the eccentric block 5 to rotate at a high speed. At this time, the centrifugal force generated by the eccentric block 5 forms the interference force of the vibration system of the "milling machine-work object". The milling cutter 14 of the road vibration milling machine generates forced vibration with a certain amplitude and frequency under the action of the interference force, and the amplitude and frequency of the forced vibration are adjusted by adjusting the current of the motor 1 through the frequency converter. The frequency of the forced vibration is equal to the frequency of the disturbing force. At this time, the milling cutter 14 transmits its vibration to the working object, and the particles of the working object change from a static initial state to a moving state under the action of vibration, and the friction force between the working object particles also gradually enters from the initial static friction state. To the state of dynamic friction, the work object is easier to be milled in this vibration state. The above content is only to illustrate the technical idea of the present utility model, and cannot limit the protection scope of the present utility model. Any changes made on the basis of the technical solution according to the technical idea proposed by the present utility model fall into the scope of the present utility model. within the scope of protection of the claims.

Claims (9)

1. A geotechnical rotary milling device, characterized in that it comprises a milling chamber (18), a drive shaft (11) and a vibration shaft (4), and both ends of the drive shaft (11) are supported on the milling machine by a drive bearing (16). On the side wall of the planing chamber (18), both ends of the vibration shaft (4) are supported in the transmission shaft (11) through vibration bearings (6), and an eccentric block (5) is fixed on the vibration shaft (4). 2. A kind of geotechnical rotary milling device according to claim 1, characterized in that both ends of the vibration shaft (4) are provided with a vibration bearing (6), wherein the inner ring of the vibration bearing (6) at one end passes through the shaft The shoulder is fixed with the vibration bearing pressure plate (7), the vibration bearing pressure plate (7) is fixedly connected with the vibration shaft (4), and the outer ring of the vibration bearing (6) at this end is fixedly connected with the vibration bearing sleeve (10); The inner ring of the bearing (6) is fixedly connected with the vibration bearing retaining ring (8), the vibration bearing retaining ring (8) is fixedly connected with the vibration shaft (4), and the outer ring of the vibration bearing (6) at this end passes through the vibration bearing sleeve (10). ) and the vibration bearing end cover (15) are fixedly connected. 3 . The geotechnical rotary milling device according to claim 1 , wherein the outer wall of the vibration shaft ( 4 ) is connected to the eccentric block ( 5 ) through eccentric bolts ( 3 ). 4 . 4 . The geotechnical rotary milling device according to claim 3 , wherein the inner wall of the eccentric block ( 5 ) closely fits with the outer wall of the vibration shaft ( 4 ). 5 . 5 . The geotechnical rotary milling device according to claim 1 , wherein the vibration shaft ( 4 ) is connected to the output shaft of the motor ( 1 ) through a coupling ( 2 ). 6 . 6 . The geotechnical rotary milling device according to claim 5 , wherein the motor ( 1 ) is fixed on the milling chamber ( 18 ) through a motor connecting plate. 7 . 7. A geotechnical rotary milling device according to claim 1, characterized in that, a transmission bearing end cover (17) is fixed outside the transmission bearing (16), and the transmission bearing end cover (17) is fixed on the milling machine by bolts chamber (18). 8 . The geotechnical rotary milling device according to claim 1 , wherein the damping block ( 19 ) is fixed on the milling chamber by fixing bolts ( 20 ). 9 . 9. A kind of geotechnical rotary milling device according to claim 1, characterized in that, the drive shaft (11) is connected with the milling drum (13) through the rotor connecting plate (12), and the milling drum (13) is fixed with a A number of milling cutters (14).

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