Open gear type pitching device for open mining equipment dumping plough

Abstract

The invention discloses an exposed gear type pitching device for a dumping plough of strip mine mining equipment, and belongs to the technical field of strip mining. The large gear and the small gear form a starting gear pair, the tower is coaxially connected with the large gear through a shaft system, the balance weight is connected to one side of the tower, the connecting rod is hinged to the other side of the tower, the connecting rod is hinged to a pitching component, and the small gear which is installed on a bearing steel structure and driven by a driving device is in transmission connection with the large gear. The large gear is connected with the tower through the fixing assembly, and torque generated by the driving device is transmitted to the large gear through meshing of the small gear and then transmitted to the tower through meshing of the large gear, so that the tower rotates around the shaft system, and the pitching component is driven to rotate through the pull rod. Torque needed by pitching is driven through meshing of an open gear pair, efficient, reliable and safe operation of equipment in a low-temperature environment can be guaranteed, then the mining intensity of high-latitude strip mines is guaranteed, and application and popularization of a continuous and semi-continuous mining process system in low-temperature areas are accelerated.

Description

Technical Field

[0001] The invention belongs to the technical field of open-pit mining equipment, and in particular relates to an open gear type pitching device for an earth dumper of open-pit mining equipment. Background Art

[0002] The pitching device of the earthmoving machine or arm stacker usually adopts hydraulic or wire rope winch type, but in the harsh environment of extremely low temperature for a long time in high latitudes, the hydraulic system faces many disadvantages. First, the viscosity of the hydraulic oil will increase significantly, resulting in a decrease in fluidity, which will affect the response speed and work efficiency of the system; second, low temperature may increase the brittleness of oil seals and pipeline materials, increasing the risk of leakage and failure; in addition, the performance of temperature sensors and control components in the hydraulic system may also be unstable at low temperatures, further affecting the reliability and safety of the system. Similarly, in low temperature environments, the performance of wire rope winch systems will also be significantly affected. First, low temperature will cause the toughness of wire rope materials to decrease, increasing the risk of brittle fracture, thereby affecting its safety and service life. Secondly, under low temperature conditions, the viscosity of the lubricating oil increases, which may increase the friction resistance of the winch, thereby affecting the startup and operation efficiency of the equipment. In addition, low temperature environments may cause frost or ice on the surface of the wire rope, which not only increases the difficulty of operation, but also may cause equipment failure. Summary of the invention

[0003] In view of the shortcomings of conventional pitching devices at present in low temperature environments, the purpose of the present invention is to provide an open gear pitching device for an open-pit mining equipment dumper.

[0004] The technical solution adopted by the invention is: an open gear type pitch device for open-pit mining equipment dumper, and its technical key points are: it includes a large gear constituting a starting gear pair and a small gear located below the large gear, a tower coaxially connected to the axis of the large gear through an axis system, a counterweight connected to one side of the tower, and a connecting rod hinged to the other side of the tower, the connecting rod is hinged to the pitch component, and the small gear driven by the driving device installed on the load-bearing steel structure is connected to the large gear in transmission, the large gear is connected to the tower through a fixing assembly, and the torque generated by the driving device is transmitted to the large gear through the meshing of the small gear, and then transmitted to the tower through the meshing of the large gear, so that the tower rotates around the axis system and drives the pitch component to rotate through the pull rod.

[0005] In the above scheme, the tower includes two main beams located at the bottom and a load-bearing main beam located at the top of the two main beams, one end of the two main beams is respectively provided with a counterweight interface, one end of the load-bearing main beam is a pull rod hinge interface, and the other end is a counterweight interface; an axis support and a support beam are connected between the two main beams, the interior of the axis support is hollow for connecting the axis, and large gear fixing assembly connection interfaces are provided at both ends of the support beam. The counterweight interfaces located at the ends of the two main beams and the load-bearing main beam are arranged in a triangular shape, and the main beam and the load-bearing main beam are welded into a spatial triangular structure by connecting beams, and the load-bearing main beam and the connecting beam are connected by a reinforced cable-stayed connection.

[0006] In the above solution, the two large gears are symmetrically connected to the two sides of the bearing steel structure through the shaft system passing through the respective axis centers.

[0007] In the above scheme, the large gear fixing assembly on the tower includes a fixed connecting rod, a spherical bearing fixed by a bearing inner ring sleeve and a bearing outer ring sleeve is installed in the mounting hole on the fixed connecting rod, a tower connecting flange shaft is installed in the spherical bearing, and one end of the tower connecting flange shaft is fixed by a shaft end fixing plate; a sealing transparent cover is connected outside the bearing inner ring sleeve, a sealing baffle is connected outside the sealing transparent cover, the lower end of the fixed connecting rod is in an inverted concave shape, and a pin shaft is connected to the side wall of the inverted concave shape.

[0008] The beneficial effects of the present invention are as follows: the open gear type pitching device for the earthmoving machine includes a torque transmission mechanism composed of an open gear pair, a tower, and a counterweight arranged on a bearing steel structure, and the torque generated by the driving device can be transmitted to the pitching component through the gear pair through the integrated tower, and finally the pitching function of the pitching component is realized. The structure is simple and easy to realize. Its essence is that the tower, the pull rod and the pitching component form a connecting rod mechanism, and the pitching function is realized by transmitting the torque through the gear pair connected to the tower. The device can replace the conventional hydraulic and wire rope hoist type pitching devices under long-term low temperature conditions at high latitudes, because under low temperature environments, the hydraulic system and the wire rope hoist have the disadvantages of low working efficiency, high failure rate and potential safety hazards. The open gear type pitching device drives the torque required for pitching through the meshing of the open gear pair, and is an efficient and reliable gear transmission type, which can ensure the efficient, reliable and safe operation of the equipment under low temperature environments, thereby ensuring the mining intensity of high-latitude open-pit mines and accelerating the promotion and use of continuous and semi-continuous mining process systems in low temperature areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0010] Figure 1 It is a schematic diagram of the composition of an open gear type pitching device for a soil dumper in an embodiment of the present invention.

[0011] Figure 2 yes Figure 1 The AA section view expresses the structural form of the pitch axis system; Figure 3 yes Figure 1 BB section view, expressing the layout of the drive device; Figure 4 yes Figure 3 The CC section view shows the structure of the drive device; Figure 5 It is a schematic diagram of the fixed end of the large gear fixing assembly; Figure 6 It is a schematic diagram of the floating part of the large gear fixing assembly; Figure 7 yes Figure 5 D1 view; Figure 8 is a schematic diagram of a tower structure in an embodiment of the present invention; The serial numbers in the figure are explained as follows: 1 large gear, 2 small gear, 3 pitch shaft system, 4 fixed connecting rod, 5 tower connecting flange shaft, 6 driving device, 7 tower, 71 main beam, 72 load-bearing main beam, 73 tie rod hinge interface, 74 connecting beam, 75 reinforced cable-stayed, 76 shaft system support, 77 support beam, 78 counterweight interface, 8 counterweight, 9 load-bearing steel structure, 10 tie rod, 11 pitch component, 12 joint bearing, 13 sealing baffle, 14 sealing transparent cover, 15 shaft end fixing plate, 16 bearing inner ring sleeve, 17 bearing outer ring sleeve, 18 pin shaft, 19 shaft end baffle, 20 anti-loosening bolt, 21 fixing part, 22 floating part. DETAILED DESCRIPTION

[0012] To make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the following is a brief description of the present invention in conjunction with the attached Figures 1 to 8 The present invention is further described in detail with reference to the accompanying drawings and specific embodiments.

[0013] As shown in the accompanying drawings, this embodiment adopts an open gear type pitching device for open-pit mining equipment dumper, and its specific structure is as follows: the large gear 1 and the small gear 2 constitute the core component of the device, the open gear pair, the large gear and the small gear located below the large gear are connected in a transmission meshing manner, the tower 7 and the large gear 1 are connected to be fixed on the bearing steel structure 9 through the fixing parts of the large gear fixing assembly, the floating parts of the large gear fixing assembly and the shaft system 3, and one end of the tower 7 is bolted to the counterweight 8 (if necessary, bolted and then welded on site), and the other end is connected to the pitching component 11 through the connecting rod 10, thereby forming a pitching mechanism in the form of a four-link structure driven by the open gear pair. The driving device 6 is a combination of a variable frequency motor + coupling + reducer, the small gear is connected to the driving device 6 through a rigid coupling, the small gear is supported by two heavy-duty bearing seats, and the connection method between the small gear and the transmission shaft can be a flat key or spline connection.

[0014] In this embodiment, two large gears 1 are symmetrically arranged on both sides of the bearing steel structure 9, and are coaxially connected through the shaft system 3, the tower 7 and the bearing steel structure 9 to ensure coaxiality during the rotation process, so that the rotation is smoother and no abnormal noise is generated. The structure of the shaft system 3 is that the shaft is fixed on the bearing steel structure 9 through interference fit, and the large gear 1 and the tower 7 rotate through the outer ring of the rolling bearing. The bearing adopts a self-aligning roller bearing with very good load-bearing capacity, and can also adapt to small manufacturing errors to ensure assembly performance. The pitch shaft system supported by the bearing steel structure 9 connects the two large gears and the tower 7 and ensures that they are coaxial when rotating with each other, and the large gear fixing components on both sides are designed as a fixed part 21 and a floating part 22, which can eliminate the axial load caused by manufacturing and installation errors.

[0015] The large gear fixing assembly of this embodiment is divided into a fixing part 21 and a floating part 22. The large gear fixing assembly adopts a hinged shaft structure of a joint bearing type. The joint bearing can offset the manufacturing errors of various parts and ensure the installation and use performance. It includes a fixed connecting rod 4, and a joint bearing 12 fixed by a bearing inner ring sleeve 16 and a bearing outer ring sleeve is installed in the installation hole on the fixed connecting rod 4. The main difference between the floating part 22 and the fixing part 21 is that the bearing outer ring sleeve 17 is slightly shorter by 3mm, and a floating gap of 3mm is formed with the end face of the outer ring of the joint bearing. The tower connecting flange shaft 5 is installed in the joint bearing 12, and one end of the tower connecting flange shaft 5 is connected to the shaft end fixing plate 15 for fixing, and the shaft end fixing plate 15 is fixed by a locking bolt 20. The bearing inner ring sleeve 16 is connected with a sealing cover 14, and a lip seal is installed in the sealing cover 14 to prevent dust from entering and affecting the service life of the joint bearing. The sealing baffle 13 is connected with the sealing cover 14. The lower end of the fixed connecting rod 4 is inverted concave. The pin 18 connects the fixed connecting rod 4 and the large gear 1 and penetrates through the side wall of the inverted concave and passes out from the other side wall opposite. The shaft end baffle 19 is also connected to the insertion end of the pin 18 for fixing. The tower 7 and the large gear 1 are connected as a whole by a large gear fixing assembly of the joint bearing hinge shaft assembly type, which can rotate with the large gear 1 to transmit the meshing torque of the gear pair, and then transmit the torque to the pitch component through the pull rod to drive the pitch component to pitch. In the bearing system, the design and configuration of the floating part and the fixed part are crucial to the stability and efficiency of the mechanical operation. The floating part usually allows axial movement to adapt to temperature changes or load fluctuations, thereby reducing stress concentration caused by thermal expansion or other factors. The fixed part bears the responsibility of support and positioning to ensure the precise centering and stable operation of the shaft. The coordination between the two not only affects the service life of the bearing, but is also directly related to the performance and reliability of the overall mechanical equipment. Therefore, in the selection and installation process of the bearing, it is necessary to fully consider the interaction between the floating part and the fixed part to achieve the best working state.

[0016] The specific structure of the tower frame 7 of this embodiment is as follows: it includes two main beams 71 located at the bottom and a bearing main beam 72 located at the top of the two main beams 71, one end of the two main beams 71 is respectively provided with a counterweight interface 78, one end of the bearing main beam 72 is a pull rod hinge interface 73, and the other end is another counterweight interface 78; an axis support 76 and a support beam 77 are connected between the two main beams 71, the shaft support 76 is hollow inside for connecting the shaft system 3, and large gear fixing assembly connection interfaces are provided at both ends of the support beam 77, and three counterweight interfaces located at the ends of the two main beams 71 and the bearing main beam 72 are arranged in a triangular shape, and the main beam 71 and the bearing main beam 72 are welded by a connecting beam 74 to form a spatial triangular structure, and the bearing main beam 72 and the connecting beam 74 are connected by a reinforcing cable tie 75.

[0017] In this embodiment, one end of the tower 7 is a counterweight 8, and the function of the counterweight 8 is to balance the load generated at one end of the pitch component 11 and optimize the force condition of the gear pair.

[0018] In this embodiment, the driving device 6 adopts the form of a variable frequency motor + a reducer, and the frequency converter can ensure the synchronous meshing of the two sets of gear pairs, thereby avoiding unbalanced load on one side of the gear pair, thereby affecting its service life.

[0019] In this embodiment, both ends of the tie rod 10 connecting the tower 7 and the pitch component 11 (belt conveyor bearing steel structure) are hinge shaft structures of joint bearings, and the swing angle of the joint bearing can ignore the shape and position tolerance of the connection position between the tower and the pitch component, ensuring effective transmission of force. Effective transmission of force is ensured without generating axial load.

[0020] The working principle of the open gear pitch device in this embodiment is as follows: in order to meet the requirements of the soil discharge process, the discharge height is an important parameter of the soil discharge machine, which needs to be achieved through the pitch function of the pitch component 11. The open gear pitch device adopted in this embodiment is essentially a four-bar linkage composed of a large gear, a tower, a connecting rod and a pitch component. The counterweight at the rear end of the tower can adjust the force of the gear pair, reduce the meshing force of the gear pair, and thus optimize the gear transmission. The main working principle of the device is that the power output of the driving device is transmitted to the small gear through a flat key or a spline structure, and then the torque is transmitted to the large gear 1 through gear meshing. The large gear 1 and the tower 7 are connected to each other through a fixed component and a pitch shaft system to rotate together, and then transmitted to the pitch component 11 through the connecting rod 10, and finally the pitch function is realized. The pitch speed is usually calibrated to a linear velocity of 0-15 m / min at the center of the redirecting roller at the front end of the pitch component 11. The rotation of the tower 7 and the rotation of the large gear 1 can be calculated through the fixed structural dimensions of the pitch mechanism. Then, according to the motor speed, the gear pair transmission ratio and the reducer speed ratio are comprehensively selected to complete the gear pair design and reducer selection.

[0021] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An open gear type pitching device for an open pit mining equipment dumper, characterized in that: It includes a large gear constituting a starting gear pair and a small gear located below the large gear, a tower coaxially connected to the axis of the large gear through an axis system, a counterweight connected to one side of the tower, and a connecting rod hinged to the other side of the tower, the connecting rod is hinged to the pitch component, and a small gear driven by a driving device installed on the load-bearing steel structure is transmission-connected to the large gear, the large gear is connected to the tower through a fixing component, and the torque generated by the driving device is transmitted to the large gear through the meshing of the small gear, and then transmitted to the tower through the meshing of the large gear, so that the tower rotates around the axis system and drives the pitch component to rotate through the pull rod.

2. The open gear type pitching device for an open pit mining equipment dumper according to claim 1, characterized in that: The tower comprises two main beams at the bottom and a bearing main beam at the top of the two main beams, one end of the two main beams is respectively provided with a counterweight interface, one end of the bearing main beam is a pull rod hinge interface, and the other end is a counterweight interface; an axis support and a support beam are connected between the two main beams, the interior of the axis support is hollow for connecting the axis, and large gear fixing assembly connection interfaces are provided at both ends of the support beam, and the counterweight interfaces located at the ends of the two main beams and the bearing main beam are arranged in a triangular shape, and the main beam and the bearing main beam are welded into a spatial triangular structure by connecting beams, and the bearing main beam and the connecting beam are connected by a reinforced cable-stayed connection.

3. The open gear type pitching device for a soil dumper as claimed in claim 1, characterized in that: The two large gears are symmetrically connected to the two sides of the load-bearing steel structure through a shaft system passing through their respective axis centers.

4. The open gear type pitching device for a soil dumper according to claim 1, characterized in that: The large gear fixing assembly on the tower includes a fixed connecting rod, a spherical bearing fixed by a bearing inner ring sleeve and a bearing outer ring sleeve is installed in the mounting hole on the fixed connecting rod, a tower connecting flange shaft is installed in the spherical bearing, and one end of the tower connecting flange shaft is fixed by a shaft end fixing plate; a sealing transparent cover is connected outside the bearing inner ring sleeve, a sealing baffle is connected outside the sealing transparent cover, the lower end of the fixed connecting rod is in an inverted concave shape, and a pin shaft is connected to the side wall of the inverted concave shape.

Images