Radial oscillation cutting mechanism

Abstract

The invention discloses a radial oscillation cutting mechanism. The core structure of the device is composed of a transmission shaft, an eccentric block, an eccentric jumping wheel, an oscillation cutting disc base, an oscillation cutting disc and the like. In the operation process, the motor serves as a power source to drive the shaft to rotate, the shaft rotates to drive the eccentric block to rotate along with the shaft, and then the two eccentric jumping wheels arranged in the 180-degree phase difference mode are promoted to start to move. The two eccentric jumping wheels are matched with the pin in a cam mode, so that the two eccentric jumping wheels move along a unique curve track. Due to the fact that the base of the oscillation cutting disc is tightly and fixedly connected with one eccentric jumping wheel, the unique movement transmission mechanism is achieved, then the oscillation cutting disc is successfully driven to execute hard rock cutting operation, and a solution which is extremely innovative and efficient is provided for hard rock cutting engineering.

Description

Technical Field

[0001] The invention belongs to the field of hard rock cutting and tunneling, and in particular relates to a hard rock cutting mechanism capable of generating radial high-frequency oscillation. Background Art

[0002] In mining, tunneling and other engineering operations, hard rock cutting is a critical but challenging task. During the construction process, high-hardness rock not only greatly shortens the service life of the cutting disc, but also seriously damages the continuity of the project progress.

[0003] Traditional cutting mechanisms rely on a single rotational motion to break rock, resulting in low excavation efficiency and severe tool wear. With the growing demand for engineering construction, there is an urgent need for a new mechanism that can efficiently cut hard rock to reduce construction costs, speed up project progress, and meet industry development needs. Therefore, it is particularly necessary to propose a hard rock crushing mechanism with a radial oscillating cutting disc. Summary of the invention

[0004] In order to solve the problems of low efficiency, high cutting force and limited applicable rock types in the existing rock cutting technology, the present invention proposes a new radial oscillating cutting mechanism based on an oscillating cutting disc, aiming to achieve efficient rock cutting and reduce operating costs.

[0005] To achieve the above objectives, the technical solutions adopted by the present invention are as follows: A radial oscillation cutting mechanism mainly includes a cutting unit, a vibration excitation unit, a driving unit and a supporting unit. The rear of the supporting unit is firmly connected to the cutting arm of the tunnel boring machine, providing a reliable supporting foundation for the entire mechanism; the cutting unit is fixedly connected to the front end of the supporting unit with a built-in excitation device to ensure the stable execution of the cutting action; when the cutting unit contacts the rock, it can rotate freely due to friction; the driving unit is placed inside the supporting unit and connected to the excitation device. The drive can also make the device perform high-frequency radial vibration through the unique internal mechanism design.

[0006] In the radial oscillation cutting mechanism of the present invention, when the eccentric mechanism is started, the eccentric mechanism drives the transmission shaft to rotate at high speed, so that the eccentric jumping wheel 1 and the eccentric jumping wheel 2 generate eccentric motion with the help of the eccentric block, and then drive the oscillating cutting disc to perform high-frequency radial oscillation to achieve radial rock breaking.

[0007] When the drive unit is started, the motor drives the transmission shaft to rotate through the coupling, and the components associated with the transmission shaft work together to make the oscillating cutter disc vibrate axially. The blade surface and other structures of the oscillating cutter disc are used to break rocks, and by adjusting specific components (such as optimizing the connection structure, etc.), the oscillating cutter disc can vibrate radially.

[0008] Based on the above technical solution, the present invention has the following significant beneficial effects: Through the coordinated operation of the vibration excitation unit and the drive unit, the oscillating cutting disc can achieve high-frequency oscillation. Different rock breaking parameters can be selected according to the different characteristics of the rock. The centrifugal force generated by the eccentric motion of the eccentric jumping wheel can be used to make the oscillating cutting disc vibrate and impact the rock at high frequency, causing fatigue cracks in the rock; the blade surface of the oscillating cutting disc can also be used to cause the rock to collapse based on the low tensile strength of the rock, effectively reducing the cutting force, allowing the oscillating cutting disc to produce compound motion, greatly improving the cutting efficiency of the rock, and broadening the range of types of rocks that can be broken. In addition, the reasonable design and connection method between the various units of the mechanism ensure the stability and effectiveness of power transmission, reduce tool wear, extend tool life, and reduce the cost of rock cutting.

[0009] When the oscillating cutting disc contacts the hard rock, the high-frequency oscillation can cause fatigue cracks inside the rock, greatly reducing the strength of the rock, thereby improving the cutting efficiency. In addition, during the working process, the interaction between the oscillating cutting disc and the rock will cause it to have a certain self-rotation tendency. This self-rotation further disperses the force between the tool and the rock, effectively reducing tool wear and extending the tool life. Compared with traditional cutting methods, the radial oscillating hard rock cutting mechanism of the present invention can significantly reduce tool wear and extend tool life. In addition, with its unique structural design, it can flexibly respond to various rock hardnesses and geological conditions in different working environments, providing a stable and efficient rock breaking effect.

[0010] The device of the present invention adopts a block disassembly design. When the cutting head is severely worn, only the oscillating cutting disc needs to be disassembled and replaced. The pin and the eccentric jumping wheel 1 and the eccentric jumping wheel 2 are all detachable mechanisms, making it easy to replace worn parts.

[0011] The above description is only a summary of the technical method of the present invention, so that the technical method can be more clearly understood and can be implemented according to its content. The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a cross-sectional view of the device of the present invention.

[0013] Figure 2 It is a partial exploded view of the device of the present invention.

[0014] Description of Figure Numbers: 1. Oscillating cut-off plate, 2. Oscillating cut-off plate base, 3. Eccentric jumping wheel 1, 4. Eccentric block, 5. Eccentric jumping wheel 2, 6. Transmission shaft, 7. Coupling, 8. Motor, 9. Motor housing 1, 10. Flange 1, 11. Transmission shaft housing, 12. Bearing 1, 13. Bearing 2, 14. Flange 2, 15. Bearing 3, 16. Bearing 4, 17. Pin, 18. Box, 19. Bearing 5, 20. Seal. DETAILED DESCRIPTION

[0015] The following will be combined with the accompanying drawings and examples to illustrate specific embodiments of the present invention in more detail. It should be noted that the following embodiments are only used to explain the present invention and are not intended to limit the scope of the present invention.

[0016] In the description of the present invention, when it is mentioned that one component is "connected", "coupled" or "connected" to another component, it should be recognized that they may be directly connected or there may be an intermediate component, that is, all situations of direct and indirect connection are covered. At the same time, directional words such as "upper", "lower", "left" and "right" are only for the convenience of describing the relative position relationship between components. The actual device or component is not necessarily limited to a specific orientation, and its relative position will change with the absolute position of the overall device.

[0017] The radial oscillation cutting mechanism of this embodiment mainly includes an oscillating cutting disc, an oscillating cutting disc base, an eccentric jumping wheel 1, an eccentric block, an eccentric jumping wheel 2, a transmission shaft, a coupling, a motor, a motor housing, a flange 1, a transmission shaft housing, a bearing 1, a bearing 2, a flange 2, a bearing 3, a bearing 4, a pin, a housing, a bearing 5 and a seal and other components.

[0018] This embodiment discloses a radial oscillating cutting mechanism, such as Figure 1 It is mainly composed of a cutting unit, a vibration excitation unit, a driving unit and a supporting unit. The structure and connection method of each unit are as follows: The core component of the cutting unit is an oscillating cutting disc (1), which is mounted on an oscillating cutting disc base (2), and the two are tightly connected by welding or high-strength bolt connection. During welding, the welding process specifications must be strictly followed to ensure welding quality; if high-strength bolt connection is used, the appropriate bolt specifications and strength grades must be selected, and a torque wrench must be used to tighten the bolts according to the specified torque, so as to ensure stability and effectiveness of power transmission during operation.

[0019] The vibration excitation unit is composed of an eccentric jumping wheel 1 (3), an eccentric block (4), an eccentric jumping wheel 2 (5), and a pin (17). First, the eccentric jumping wheel 1 (3) and the eccentric jumping wheel 2 (5) are installed at the corresponding positions of the eccentric block (4), and the positions must be ensured to be accurate during the installation process. Then, they are installed on the transmission shaft (6) through the eccentric bearing. When installing the eccentric bearing, attention should be paid to its installation direction and clearance to ensure that the eccentric jumping wheel can rotate flexibly. The outer peripheral contours of the eccentric jumping wheel 1 (3) and the eccentric jumping wheel 2 (5) interact with the pin (17) in a cam-matching manner. First, the pin (17) is fixed in a reserved position of the box (18), and a nut or a cotter pin can be used to fix it. Then, the eccentric jumping wheel 1 (3) and the eccentric jumping wheel 2 (5) are installed, and the positions of the eccentric jumping wheels are accurately adjusted so that the pin (17) accurately contacts the cam contour of the eccentric jumping wheel, and the initial contact position and matching clearance between the cam contour and the pin (17) meet the design standards. At the same time, it is necessary to ensure that the eccentricity of the two is precisely designed and optimized, placed with a phase difference of 180°, and the movement directions are opposite to each other, so as to achieve precise phase control and power transmission and produce complex vibration patterns.

[0020] The drive unit mainly includes a motor (8), a coupling (7), a transmission shaft (6), a motor housing 1 (9), a flange 1 (10), and a transmission shaft housing (11). First, the motor (8) is firmly installed on the flange 1 (10) by bolts. When installing the bolts, use a torque wrench to tighten the bolts according to the specified torque to ensure that the motor is firmly installed. The output shaft of the motor (8) is reliably connected to the transmission shaft (6) by means of the coupling (7). Matching keyways are machined at the ends of the motor output shaft and the transmission shaft (6). After the key is installed in the keyway, the coupling (7) is tightened with a nut or a shaft retaining ring, thereby stably transmitting power to the transmission shaft (6). When installing the coupling (7), pay attention to its centering accuracy. Tools such as a dial indicator can be used for measurement and adjustment to reduce vibration and noise. The transmission shaft (6) rotates in the transmission shaft housing (11), and the transmission shaft housing (11) is tightly connected to the motor housing 1 (9) through the flange 1 (10). Sealant is applied to the connection part or a sealing gasket is installed to ensure that the connection is tight and the seal is good.

[0021] The support unit is composed of a housing (18), a bearing 5 (19), and a seal (20). When installing bearing 1 (12) and bearing 2 (13) on the transmission shaft housing (11), first press the outer ring of the bearing into the installation hole. The pressing process should be smooth. A press machine or other tool can be used to assist the installation to avoid damaging the bearing. Then insert the transmission shaft (6) to ensure its stable rotation. When installing bearing 3 (15) and bearing 4 (16) on the eccentric block, first put on the inner ring of the bearing and then install the outer ring to achieve a close connection with the eccentric jump wheel and optimize the power transmission path. Install bearing 5 (19) in the housing (18) to support the oscillating cutter base (2), bear the axial force, and ensure the stable movement of the oscillating cutter (1). Pay attention to the installation direction and matching accuracy of the bearing during installation. During the installation of the seal (20), it is installed at relevant locations such as the housing (18) and the transmission shaft housing (11), such as at the hole where the transmission shaft passes through the housing, at the gaps where the components are connected, etc., and a good seal is achieved by applying sealant or installing a sealing gasket. During the operation of the mechanism, even in a complex motion state, it can still effectively prevent the intrusion of impurities such as dust and moisture.

[0022] The working principle of this embodiment is as follows: after the motor (8) is started, the torque generated by it is transmitted to the transmission shaft (6) through the coupling (7), driving the transmission shaft (6) to rotate. The rotation of the transmission shaft (6) drives the eccentric block to rotate, thereby causing the eccentric jumping wheel 1 (3) and the eccentric jumping wheel 2 (5) to generate eccentric motion. Due to its special profile design, the eccentric jumping wheel 1 (3) generates a unique curved driving motion during the eccentric motion. At the same time, the eccentric jumping wheel 1 (3) and the eccentric jumping wheel 2 (5) cooperate with the cam of the pin (17), so that their motions can be mutually related and coordinated according to a specific law. Since the eccentric jumping wheel 1 (3) and the oscillating cutter base (2) are in solid contact, the combined effect of the unique curved driving motion generated by the cam cooperation and the coordinated motion of the two eccentric jumping wheels can be directly and stably transmitted to the oscillating cutter base (2), thereby driving the oscillating cutter (1) to generate high-frequency oscillation in the radial direction.

[0023] It should be noted that, according to the hardness, texture and other characteristics of the rock to be cut, the speed of the motor (8), the eccentricity of the eccentric block, the profile parameters of the eccentric jump wheel, etc. can be appropriately adjusted. For example, when cutting rocks with higher hardness, the motor speed and eccentricity can be appropriately increased to enhance the vibration effect; when the rock texture is more complex, the profile parameters of the eccentric jump wheel can be optimized to improve the rock breaking efficiency. At the same time, the various components are regularly inspected and maintained, and severely worn components such as bearings and seals are replaced in a timely manner to ensure that the mechanism is always in good working condition.

[0024] In summary, the radial oscillation cutting mechanism provided by the present invention can effectively improve the hard rock cutting efficiency, reduce tool wear, expand the applicable rock range, and thus reduce engineering costs.

[0025] The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention. It should be noted that a person skilled in the art may make several modifications and variations without departing from the technical principles of the present invention, and these modifications and variations should also be regarded as part of the protection scope of the present invention.

Claims

1. A radial oscillating cutting mechanism, characterized in that: The radial oscillation cutting mechanism comprises a cutting unit, a vibration excitation unit, a driving unit and a supporting unit, which work together to achieve efficient cutting operations on hard rocks under different geological conditions.

2. The radial oscillation cutting mechanism according to claim 1, characterized in that: Each unit is interconnected through a specific connection structure and mechanical transmission method to ensure the integrity and functional coordination of the entire mechanism.

3. The radial oscillation cutting mechanism according to claim 1, characterized in that: The cutting unit comprises an oscillating cutting disc and an oscillating cutting disc base, wherein the oscillating cutting disc is mounted on the oscillating cutting disc base, and the connection structure between the two can withstand the force during the cutting operation to ensure stability and power transmission efficiency during the cutting process; the connection method includes but is not limited to mechanical connection means to ensure that there is no connection failure and power transmission interruption during the cutting process.

4. The radial oscillating cutting mechanism according to claim 1, characterized in that: The vibration excitation unit includes an eccentric jumping wheel 1, an eccentric block, an eccentric jumping wheel 2 and a pin. These components realize power transmission and motion conversion through a unique mechanical structure and matching method.

5. The radial oscillating cutting mechanism according to claim 1, characterized in that: Based on the rotation of the transmission shaft, the eccentric jumping wheel 1 and the eccentric jumping wheel 2 move according to a predetermined motion trajectory and phase relationship in cooperation with the eccentric block to generate a specific vibration mode.

6. The radial oscillating cutting mechanism according to claim 1, characterized in that: The matching mode of the eccentric jumping wheel 1 and the eccentric jumping wheel 2 with the pin can be adjusted according to different cutting requirements to produce corresponding vibration excitation effects.

7. The radial oscillating cutting mechanism according to claim 1, characterized in that: The drive unit comprises a motor, a coupling, a transmission shaft, a motor housing, a flange 1 and a transmission shaft housing. The motor transmits power to the transmission shaft through a reliable connection device.

8. The radial oscillating cutting mechanism according to claim 1, characterized in that: The installation method and power output method of the motor ensure that the power of the motor can be effectively converted into the rotational power of the transmission shaft, providing continuous power for the operation of the entire mechanism.

9. The radial oscillating cutting mechanism according to claim 1, characterized in that: The rotation of the transmission shaft is supported and constrained in the transmission shaft housing, ensuring the stability and reliability of its rotation.

10. The radial oscillating cutting mechanism according to claim 1, characterized in that: The support unit includes a housing, a bearing and a sealing structure. The bearing provides axial support for key components in the mechanism to ensure stable movement of the components under stress.

11. The radial oscillating cutting mechanism according to claim 1, characterized in that: The sealing structure is distributed in the key parts of the mechanism to prevent the dust, moisture and other impurities in the external environment from adversely affecting the internal components, ensuring the normal operation and service life of the mechanism.

12. The radial oscillating cutting mechanism according to claim 1, characterized in that: In the connection structure between the motor and the drive shaft, the motor output shaft and the drive shaft end adopt matching keyway structures, and the coupling is fastened by keys and nuts to achieve stable power transmission and reliable torque transmission; this connection structure allows the power transmission to be adjusted and optimized to meet the power requirements under different working conditions.

13. The radial oscillating cutting mechanism according to claim 1, characterized in that: The installation of the eccentric jumping wheel 1 and the eccentric jumping wheel 2 follows a certain order. First, they are installed at the corresponding position of the eccentric block, and then connected with the transmission shaft; the installation process ensures that the position accuracy and movement characteristics of the eccentric jumping wheel on the transmission shaft meet the predetermined design to ensure the excitation effect generated by its movement.

14. The radial oscillating cutting mechanism according to claim 1, characterized in that: The eccentric jumping wheel 1 is connected to the cutting oscillating cutting disk base through high-strength connecting components to ensure the efficiency and reliability of motion transmission from the eccentric jumping wheel to the cutting oscillating cutting disk base; the connection structure can withstand various stresses generated by vibration excitation and cutting process without loosening or damage.

15. The radial oscillating cutting mechanism according to claim 1, characterized in that: When installing bearing 1 and bearing 2 on the transmission shaft housing, the outer ring of the bearing is first embedded into the mounting hole and then inserted into the transmission shaft to ensure stable rotation of the transmission shaft; a structure compatible with the pin replacement operation is provided on the transmission shaft housing to facilitate replacement and maintenance operations on the pin.

16. The radial oscillating cutting mechanism according to claim 1, characterized in that: When flange 1 connects the motor housing and the drive shaft housing, a tight connection and good sealing effect are achieved through reasonable arrangement; flange 2 connects the box body and the drive shaft housing, and its structure ensures that the drive shaft can pass through the corresponding hole smoothly, while ensuring the firmness of the connection and the structural integrity.

17. The radial oscillating cutting mechanism according to claim 1, characterized in that: When installing bearing 3 and bearing 4 on the eccentric block, first insert the inner ring of the bearing into the eccentric block, and then install the outer ring to form a tight connection structure; this connection structure can optimize the power transmission path between the eccentric block and the eccentric jumping wheel and reduce energy loss.

18. The radial oscillating cutting mechanism according to claim 1, characterized in that: The cam matching structure of the eccentric jumping wheel 1 and the eccentric jumping wheel 2 and the pin ensures the matching accuracy of the cam and the pin by fixing the pin in the reserved position of the box and then accurately adjusting the installation position of the eccentric jumping wheel; the initial contact position and matching clearance of the matching structure meet the predetermined design standards during installation, ensuring the accuracy and reliability of the movement.

19. The radial oscillating cutting mechanism according to claim 1, characterized in that: The eccentric jumping wheel 1 and the eccentric jumping wheel 2 are arranged on the transmission shaft with a phase difference of 180° and move in opposite directions. Their design and installation meet the requirements of accurately controlling the phase and amplitude of vibration excitation; this arrangement and movement mode ensure that the mechanism can achieve stable and efficient vibration excitation during operation to achieve efficient cutting performance.

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