Vibrating type milling device and engineering machinery

Abstract

The invention provides a vibration type milling device, which is used for executing the operation of engineering machinery, and comprises a vibration excitation mechanism (10) for generating vibration; the vibration excitation mechanism (1) is used for exciting a stratum, and the milling mechanisms (20 and 30) are used for milling the stratum and connected with the vibration excitation mechanism (1) to vibrate along with vibration of the vibration excitation mechanism (1). The vibrating type milling device is detachably connected with the main machine (1).

Description

Technical Field

[0001] The present application relates to the technical field of engineering machinery accessories, and in particular to a vibration milling device for engineering machinery. Background Art

[0002] The milling devices of current engineering machinery usually have a single rotary cutting function. The milling devices are matched with picks and are widely used in rock milling and excavation in mines, tunnels, ditches, roads and other fields. The existing milling devices are mainly suitable for excavation scenarios of medium-soft rock formations. The excavation construction efficiency is low for medium-hard rock formations, and construction may even be impossible, affecting the overall progress of the project. At the same time, the milling and excavation working conditions are relatively harsh, and the traditional transmission box has a single-channel sealing structure with low reliability, resulting in frequent transmission box oil leakage and lubricating oil contamination. At the same time, there are problems such as unstable transmission and loud noise in the transmission system.

[0003] In addition, current milling devices can usually only perform rotary milling and are only suitable for construction in medium-soft formations. For medium-hard rock formations above 50MPa, the construction efficiency is low and other accessories need to be replaced for construction, which increases construction costs and affects construction progress.

[0004] Moreover, the transmission box of the current milling device is a single-channel radial sealing structure. The radial runout of the transmission shaft under vibration and impact conditions leads to low sealing reliability, which can easily cause oil leakage in the transmission box and contamination of the lubricating oil. At the same time, the single-sided transmission shaft adopts a single bearing support and is a cantilever structure. During the construction process, there are problems such as unstable transmission of the transmission system and loud noise.

[0005] In addition, the torque between the drive shaft and the wheel hub is transmitted by bolts, which have weak load-bearing capacity, are prone to breakage, and have a high failure rate. Summary of the Invention

[0006] To improve the above-mentioned problems, the present application provides a vibration milling device, which is used to perform the work of an engineering machine, comprising:

[0007] a vibration excitation mechanism for generating vibration; and

[0008] The milling mechanism is used for milling the ground layer and is connected to the vibration mechanism to vibrate along with the vibration of the vibration mechanism.

[0009] In some embodiments, the vibration direction of the vibration mechanism of the present application is the same as the milling feed direction of the milling mechanism.

[0010] In some embodiments, the excitation mechanism includes:

[0011] First Motor;

[0012] a first rotating shaft rotatably connected to the first motor;

[0013] A mass is eccentrically arranged on the first rotating shaft to generate vibration when the first rotating shaft rotates.

[0014] In some embodiments, the excitation mechanism of the present application includes:

[0015] A connecting frame, used for detachably connecting to a main machine of the engineering machinery; and

[0016] A vibration buffer is arranged between the connecting frame and the block and is used for buffering the vibration of the block.

[0017] In some embodiments, the milling mechanism comprises:

[0018] case;

[0019] a wheel hub, detachably arranged in the housing;

[0020] a second rotating shaft rotatably supported on the wheel hub; and

[0021] The rotatable milling part is used for milling and excavating the ground and is fixedly connected to the outer end of the second rotating shaft.

[0022] In some embodiments, a plurality of seals are arranged between the wheel hub and the second rotating shaft, and an end cover is arranged between the outer end of the wheel hub and the second rotating shaft.

[0023] The plurality of seals include at least one of the following:

[0024] a first seal disposed between the end cover and the hub;

[0025] a second seal disposed between the outer end of the hub and the second shaft; and

[0026] A third seal is arranged between the inner end of the housing and the wheel hub.

[0027] In some embodiments, the first seal is configured as a labyrinth structure, including a Z-shaped structure.

[0028] In some embodiments, the two milling parts are arranged in one-to-one correspondence with the two second rotating shafts, and the two second rotating shafts are arranged in one-to-one correspondence with the two wheel hubs. At least a ball bearing and a pair of tapered roller bearings arranged opposite to each other are arranged between each second rotating shaft and the corresponding wheel hub.

[0029] In some embodiments, the milling mechanism comprises:

[0030] a second motor; and

[0031] a gear drivably connected to the second motor;

[0032] The external splines on the inner ends of the two second rotating shafts are drivingly engaged with the internal splines of the central hole of the gear.

[0033] In some embodiments, the ball bearing is arranged between the wheel hub and the gear; and / or the tapered roller bearing is arranged between the wheel hub and the second rotating shaft.

[0034] In some embodiments, each of the milling members is fastened to the outer end of the corresponding second rotating shaft via a connecting member, the connecting member passes through tapered holes formed on the milling member and the second rotating shaft, and a tapered elastic member is arranged between the tapered hole and the connecting member.

[0035] According to another aspect of the present application, there is provided an engineering machine, comprising:

[0036] Host; and

[0037] According to the above-mentioned vibration milling device, it is detachably connected to the main machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] According to common practice, the various features of the drawings described below are not necessarily drawn to scale. The sizes of the various features and elements in the drawings may be expanded or reduced to more clearly illustrate the embodiments of the present application.

[0039] Figure 1 is a schematic diagram of the overall structure of an engineering machine according to an embodiment of the present application;

[0040] Figure 2 for Figure 1 Structural diagram of the milling mechanism of the engineering machinery;

[0041] Figure 3 It is a structural diagram of the excitation mechanism of the milling mechanism;

[0042] Figure 4 for Figure 2 A schematic cross-sectional view of the milling mechanism along line AA; and

[0043] Figure 5 for Figure 4 Schematic diagram of the cross section of the milling mechanism along line BB;

[0044] Figure 6 for Figure 5 A partial enlarged schematic diagram of the milling mechanism;

[0045] Figure 7 for Figure 6 A magnified view of region A in FIG; and

[0046] Figure 8 It is a structural schematic diagram of the conical elastic sleeve. DETAILED DESCRIPTION

[0047] With reference to the accompanying drawings, those skilled in the art will understand the technical advantages of various embodiments by reading the following detailed description of the embodiments. The various embodiments discussed above, alone or in various combinations, are within the scope of this application.

[0048] like Figure 1 As shown, the present application relates to an engineering machine, which includes a main machine 1 and a vibrating milling device 2 as an accessory of the engineering machine. The milling device 2 is detachably connected to the main machine 1. The milling device 2 includes an excitation mechanism 10 and a milling mechanism connected to each other. The excitation mechanism 10 generates vibration, which is transmitted to the milling mechanism, so that the milling mechanism can rotate and mill the formation while vibrating.

[0049] In some embodiments, as Figure 2 As shown, the milling mechanism includes a milling transmission device 20 and a milling part such as a milling wheel 30. The vibration mechanism 10 drives the first rotating shaft 16 through the first motor 12 to drive the eccentric block 17 to rotate at high speed to generate an exciting force. It is connected to the main machine 1 through the connecting pin 18 of the connecting frame 11, and is connected to the milling transmission device 20 through the vibration frame 14 to realize the transmission of the exciting force; the milling transmission device 20 drives the upper gear 21 through the second motor 24, which engages with the intermediate gear 22 to transmit the torque to the lower gear 23, and the lower gear 23 transmits the torque to the second rotating shafts 28 on both sides through the internal spline; the milling wheel 30 is connected to the second rotating shaft 28 through the bolt 31, the retaining ring 32 and the conical elastic sleeve to realize the rotation of the milling wheel 30; the milling wheel 30 can be driven by the vibration mechanism 10 and the milling transmission device 20 to achieve high-frequency vibration rotation milling function.

[0050] In some embodiments, as Figure 3 and 4 As shown, the vibration mechanism 10 mainly includes a connecting frame 11, a first motor 12, an elastic vibration damper 13, an excitation frame 14, a bearing 15, a first rotating shaft 16, an eccentric block 17, and a connecting pin 18. The connection with the host 1 is achieved through the connecting pin 18 on the connecting frame 11. A plurality of elastic vibration dampers 13 are arranged between the connecting frame 11 and the excitation frame 14 to achieve vibration reduction and noise reduction of the host 1.

[0051] The first motor 12 is fixedly connected to the vibration frame 14, and a bearing 15 is arranged between the vibration frame 14 and the transmission shaft to realize relative rotation between the two. The first rotating shaft 16 and the eccentric block 17 can be welded or fixedly connected with bolts. The first motor 12 drives the first rotating shaft 16 and the eccentric block 17 to rotate synchronously to realize high-frequency vibration of the vibration frame 14. A plurality of mounting holes 140 are arranged at the bottom of the vibration frame 14 and are fixedly connected to the milling transmission device 20.

[0052] In some embodiments, as Figure 4 and 5 As shown, the milling transmission device 20 includes components such as a housing 214, an upper gear 21, an intermediate gear 22, a lower gear 23, and a second motor 24. The housing 214 is fixedly connected to the vibration frame 14 in the vibration mechanism 10 by fasteners to achieve the transmission of the exciting force. The second motor 24 is fixedly connected to the housing 214 and is connected to the transmission shaft through a spline to output power to the upper gear 21. The upper gear 21 engages with the intermediate gear 22 to transmit torque to the lower gear 23. The milling transmission device 20 is fixedly connected to the vibration frame 14 through the housing 214.

[0053] In some embodiments, as Figure 5 and 6 As shown, the milling transmission device 20 includes two second rotating shafts 28, a hub 29, a ball bearing 25 and a tapered roller bearing 26; the hub 29 is fixedly connected to the housing 214 by a bolt 27, and a ball bearing 25 is arranged between the lower gear 23 and the hub 29. The inner ring of the ball bearing 25 abuts against the lower gear 23, and the outer ring abuts against the hub 29, so as to achieve support for the lower gear 23 and rotation relative to the hub 29; a pair of tapered roller bearings 26 arranged oppositely are provided between the second rotating shaft 28 and the hub 29, the inner ring of the tapered roller bearing 26 abuts against the second rotating shaft 28, and the outer ring abuts against the hub 29, so as to achieve support for the second rotating shaft 28 and relative rotation between the hub 29; the center hole of the lower gear 23 is provided with an internal spline, and the outer circumference of the second rotating shaft 28 is provided with an external spline. The lower gear 23 and the second rotating shaft 28 are spline-connected to output the rotational torque to the two second rotating shafts 28 located on both sides.

[0054] In some embodiments, as Figure 7 As shown, the milling transmission device 20 is provided with a floating seal 212, a dust ring 213, and a sealing end cover 210. The floating seal 212 is arranged between the sealing end cover 210 and the wheel hub 29. The sealing end cover 210 is fixedly connected to the second rotating shaft 28. The first seal between the second rotating shaft 28 and the wheel hub 29 is realized by the floating seal 212. A plurality of "Z"-shaped structures are arranged between the sealing end cover 210 and the wheel hub 29 to form a labyrinth seal structure as the second seal. A dust ring 213 is arranged between the fixed wheel hub 29 and the milling wheel 30, which can serve as the third seal. The transmission system is sealed by the triple seal of "dust ring + labyrinth seal + floating seal".

[0055] In some embodiments, as Figure 7 and 8As shown, the outer end of the milling wheel 30 is provided with multiple sets of fixing bolts 31, retaining rings 32 and tapered elastic sleeves 33. The milling wheel 30 is fixedly connected to the second rotating shaft 28 through the fixing bolts 31, retaining rings 32 and tapered elastic sleeves 33 to realize the milling wheel rotation milling. The tapered elastic sleeve 33 has an opening 330 and has a certain elastic deformation ability. It is located between the milling wheel 30 and the second rotating shaft 28 and is provided with a tapered hole that matches the outer diameter of the tapered elastic sleeve 33. The tapered elastic sleeve 33 is fixedly connected to the second rotating shaft 28 through the fixing bolts 31 and retaining rings 32. The sleeve 33 is pressed into the tapered holes of the milling wheel 30 and the second rotating shaft 28. As the fixing bolt 31 is gradually screwed into the threaded hole at the bottom of the tapered hole of the second rotating shaft 28, the tapered elastic sleeve 33 is gradually squeezed and elastically deformed and embedded in the tapered hole of the connecting piece, thereby realizing a tight connection between the milling wheel 30, the second rotating shaft 28 and the tapered elastic sleeve 33. That is, the rotational torque in the circular milling direction of the milling wheel 30 and the axial load during lateral deflection construction are transmitted through the combination of "fixing bolt + tapered elastic sleeve".

[0056] In some embodiments, as Figure 1 As shown, the main machine 1 of the engineering machinery used in conjunction with the vibration milling device performs left and right swing-type lateral milling during milling construction. The excitation mechanism 10 can rotate in the left and right directions to generate an excitation force that is consistent with the milling feed direction, which can produce a milling + impact composite operation on the rock formation, thereby improving the rock formation milling efficiency.

[0057] The vibratory milling device is connected to the main machine 1 via a connecting frame 11. The main machine's rotation enables left and right lateral milling, while the excitation mechanism 10 produces high-frequency lateral vibrations. The milling device 2 achieves rotary cutting. When milling soft or medium-soft formations, the excitation mechanism 10 can be turned off, allowing milling to rely solely on rotation. When milling hard or medium-hard formations, the excitation mechanism 10 is turned on to achieve a combined "impact + rotation" operation, improving efficiency.

[0058] According to this application, the high-frequency vibration milling device improves the problems of low construction efficiency and slow construction progress in medium-hard formations. When encountering medium-hard rock formations, the vibration device is turned on, and the vibration direction is consistent with the rotary milling feed direction, realizing the "impact + rotation" composite operation, which can effectively improve the construction efficiency of hard rock formation conditions. There is no need to replace other impact crushing accessories during construction, which reduces the customer's construction procurement cost and improves construction efficiency.

[0059] According to some embodiments of the present application, facing harsh working conditions such as impact, high speed, and heavy pollution, the seals are easily damaged, resulting in oil leakage in the transmission box, and the lubricating oil is easily contaminated, causing failure of the transmission system. The present application adopts a triple sealing structure of "dust ring + labyrinth seal + floating seal". The floating seal can compensate for the radial runout during the rotation of the output shaft, and can meet harsh working conditions such as vibration and heavy pollution, thereby improving the sealing reliability of the transmission system.

[0060] According to some embodiments of the present application, the output shaft of the transmission system is supported by a combination of multiple bearings including a pair of tapered roller bearings and ball bearings, thereby improving transmission rigidity and load-bearing capacity and improving transmission reliability.

[0061] According to some embodiments of the present application, the transmission system and the milling wheel are connected by a combination of "fixed bolts + conical elastic sleeves" to achieve reliable transmission of axial loads and circumferential torque, and have strong resistance to vibration and impact, and reliable connection, thereby solving the problems of existing load transmission relying solely on bolt connections, which leads to easy breakage of bolts and poor connection reliability.

[0062] The foregoing description of the application illustrates and describes some exemplary embodiments. Without departing from the spirit and scope of the application, various additions, modifications, changes, etc. can be made to these exemplary embodiments. It is intended that all contents included in the above description or shown in the accompanying drawings be interpreted as illustrative, rather than restrictive. In addition, the application only shows and describes selected embodiments of the application, but within the scope of the inventive concept as expressed herein, commensurate with the above teachings, and / or within the skills or knowledge of those skilled in the relevant art, the application can be used in various other combinations, modifications and environments and can be changed or modified. In addition, some features and characteristics of each embodiment can be selectively interchanged and applied to other illustrated and unillustrated embodiments of the application.

Claims

1. A vibration milling device, characterized in that: The vibration milling device is used to perform the work of engineering machinery, including: a vibration excitation mechanism (10) for generating vibration; and The milling mechanism (20, 30) is used for rotary milling of the ground formation and is connected to the vibration mechanism (1) to vibrate along with the vibration of the vibration mechanism (1).

2. The vibration milling device according to claim 1, characterized in that The vibration direction of the vibration excitation mechanism (10) is the same as the milling feed direction of the milling mechanism (20, 30).

3. The vibration milling device according to claim 1, characterized in that The excitation mechanism (1) comprises: First motor (12); a first rotating shaft (16) rotatably connected to the first motor (12); A mass (17) is eccentrically connected to the first rotating shaft (16) to generate vibration when the first rotating shaft (16) rotates.

4. The vibration milling device according to claim 1, characterized in that The excitation mechanism (10) comprises: A connecting frame (11) is used for being detachably connected to a main machine of the engineering machinery; and A vibration buffer (13) is arranged between the connecting frame (11) and the block (17) and is used to buffer vibration from the block (17).

5. The vibration milling device according to claim 1, characterized in that The milling mechanism (20, 30) comprises: Housing (214); A wheel hub (29) detachably arranged in the housing (214); a second rotating shaft (28) rotatably supported on the wheel hub (29); and The rotatable milling member (30) is used for milling and excavating the ground layer and is fixedly connected to the outer end of the second rotating shaft (28).

6. The vibration milling device according to claim 5, characterized in that A plurality of seals are arranged between the wheel hub (29) and the second rotating shaft (28), and an end cover (210) is arranged between the outer end of the wheel hub (29) and the second rotating shaft (28). The plurality of seals include at least one of the following: a first sealing member (211) disposed between the end cover (210) and the wheel hub (29); a second sealing member (212) disposed between the outer end of the hub (29) and the second rotating shaft (28); as well as A third sealing member (213) is arranged between the inner end of the housing (214) and the hub (29).

7. The vibration milling device according to claim 6, characterized in that The first sealing member (211) is configured as a labyrinth structure, including a Z-shaped structure.

8. The vibration milling device according to claim 5, characterized in that The two milling parts (30) are respectively arranged in one-to-one correspondence with the two second rotating shafts (28), and the two second rotating shafts (28) are respectively arranged in one-to-one correspondence with the two wheel hubs (29). At least a ball bearing (25) and a pair of tapered roller bearings (26) arranged opposite to each other are arranged between each second rotating shaft (28) and the corresponding wheel hub (29).

9. The vibration milling device according to claim 8, characterized in that The milling mechanism (20, 30) comprises: a second motor (24); and a gear (23) drivably connected to the second motor (24); The external splines on the inner ends of the two second rotating shafts (28) are drivingly engaged with the internal splines of the central hole of the gear (23).

10. The vibration milling device according to claim 8, characterized in that The ball bearing is arranged between the hub (29) and the gear (23); and / or The tapered roller bearing is arranged between the wheel hub (29) and the second rotating shaft (28).

11. The vibration milling device according to claim 5, characterized in that Each of the milling members (30) is fastened to the outer end of the corresponding second rotating shaft (28) via a connecting member (31), the connecting member (31) passing through a tapered hole formed on the milling member (30) and the second rotating shaft (28), and a tapered elastic member (33) is arranged between the tapered hole and the connecting member (31).

12. An engineering machine, characterized in that: include: Host (1); as well as The vibration milling device (2) according to any one of claims 1 to 11 is detachably connected to the main machine (1).

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