Split crushing mechanism with rocker arm power

Abstract

The present invention relates to a split type crushing mechanism with rocker arm power, comprising a bracket, a connecting seat, a crushing tooth assembly and a rocker arm of a mining machine, wherein the bracket comprises a base and front and rear support plates, the base and the connecting seat are both fixed on the rocker arm, the crushing tooth assembly comprises a rotating shaft, a plurality of sleeves sleeved side by side on the rotating shaft and crushing teeth mounted on the sleeves, the front and rear parts of the rotating shaft are respectively supported by rotation on the front and rear support plates, the front end of the rotating shaft passes through the front support plate and is located in the inner cavity of the connecting seat, the rear end of a transmission gear in the rocker arm extends out of the rocker arm and is located in the inner cavity of the connecting seat, the rear end of the transmission gear and the front end of the rotating shaft are connected by a transmission system, the front and rear support plates can be installed at different positions of the base, and the connecting seat can also be installed at different positions of the rocker arm. The present invention can be used on a mining machine used for mining thinner ore layers or high-grade thin ore layers, effectively crushing rock blocks so that the rock blocks can pass smoothly from under the rocker arm of the mining machine to avoid accumulation.

Description

Technical Field

[0001] The present invention relates to a crushing mechanism for a mining machine, and is particularly applicable to a mining machine for mining thinner ore layers or high-grade thin ore layers. Background Art

[0002] In order to adapt to the mining of thinner ore layers or high-grade thin ore layers, a boom with a high-power (high-torque) cutting system is usually adopted on a bauxite mining machine. The boom has a low height, a compact structure, and a high power density. The cutting motor arranged in the boom housing occupies a large space in the front-rear direction, resulting in insufficient space between the cutting motor and the cable trough to arrange a conventional crushing device. However, in the actual mining of the mining machine, a large number of high-hardness bauxite rocks often appear. These bauxite rocks need to pass under the position where the cutting motor of the boom is located after entering the conveyor. However, many of them are large-sized rocks and cannot pass through. Eventually, the accumulation causes the conveyor to be unable to convey, and it is necessary to stop the machine for manual cleaning, which is time-consuming and laborious and also affects the production capacity. Summary of the Invention

[0003] The object of the present invention is to provide a split-type crushing mechanism with boom power, which can be used on a mining machine for mining thinner ore layers or high-grade thin ore layers, effectively crush large-sized rock blocks, enable the rock blocks to smoothly pass under the boom of the mining machine, and avoid accumulation.

[0004] The main technical solutions of the present invention are as follows:

[0005] The support frame is fixed on the rear side of the rocker arm, and the inner cavity of the connecting seat is provided with a transmission system, and the connecting seat is located in front of the front support plate and the rear support plate, and the connecting seat is provided with a transmission system, and the connecting seat is located in front of the front support plate and the rear support plate, and the connecting seat is located in front of the front support plate and the rear support plate, and the connecting seat is located in front of the front support plate and the rear support plate, and the connecting seat is located in front of the front support plate and the rear support plate, and the connecting seat is located in front of the front support plate and the rear support plate, and the connecting seat is located in front of the front support plate and the rear support plate. The crushing tooth assembly comprises a rotating shaft, a plurality of sleeves sleeved side by side on the rotating shaft, and crushing teeth installed on the sleeves, the front and rear parts of the rotating shaft are rotatably supported on the front support plate and the rear support plate respectively, and the rotating shaft extends horizontally front and back, the front end of the rotating shaft passes through the front support plate and is located in the inner cavity of the connecting seat, the rear end of a transmission gear in the mining machine rocker arm extends out from the rear side wall of the arm support part of the mining machine rocker arm and is located in the inner cavity of the connecting seat, the rear end of the transmission gear and the front end of the rotating shaft are connected through the transmission system, the transmission gear is not coaxial with the rotating shaft, and a plurality of rocker pin holes are provided on the rear side surface of the arm support part of the mining machine rocker arm and are circumferentially spaced with the axis of the transmission gear as the center, and a connecting seat pin hole is provided on the connecting seat, and the angular positioning of the connecting seat relative to the axis of the transmission gear is achieved between the connecting seat and the arm support part by installing a second locating pin at the connecting seat pin hole and a rocker pin hole.

[0006] The front side plate and the rear side plate are respectively provided with M side plate pin holes, and the front support plate and the rear support plate are respectively provided with N support plate pin holes, M≥N, M≥3, N≥2.

[0007] A flat mounting surface is provided on the side of the roller portion of the mining machine rocker arm, the outer side surface of the base is attached to the flat mounting surface, and the bracket and the mining machine rocker arm are positioned by a plurality of pins.

[0008] The front and rear parts of the rotating shaft can be supported on the front support plate and the rear support plate respectively through bearings. The front support plate and the rear support plate are both equipped with inner end covers on the sides close to each other, and are both equipped with outer end covers on the sides away from each other. The inner and outer end covers limit the corresponding bearings axially from the front and rear directions.

[0009] The inner end cover is indirectly sleeved on the rotating shaft through a retaining ring. The retaining ring axially limits the inner ring of the corresponding bearing, and all the shaft sleeves are axially limited between the two retaining rings.

[0010] The front support plate and the rear support plate may be provided with a protective cover, and the protective cover shields above the crushing tooth assembly.

[0011] The side plate pin holes on the front side plate and the rear side plate are each circumferentially and equally spaced around the axis of the transmission gear.

[0012] The transmission gear may include two sections of external gears, the front section of the external gear is located inside the rocker arm of the mining machine, the rear section of the external gear is located inside the connecting seat, and the shaft neck is between the two sections of the external gears. The shaft neck is supported on the housing of the rocker arm of the mining machine through the boom bearing.

[0013] A transition gear is installed in the inner cavity of the connecting seat. The transition gear is externally meshed with the rear section of the external gear of the transmission gear. The transition gear is provided with an internal spline, and the front end of the rotating shaft is provided with an external spline. The front end of the rotating shaft is spline-connected to the transition gear.

[0014] Preferably, the front end of the connecting seat is embedded in the housing of the boom part of the rocker arm of the mining machine in a circular stop structure.

[0015] The beneficial effects of the present invention are as follows:

[0016] As part of the cutting transmission system of the rocker arm of the mining machine, the transmission gear provides power for the rotation of the rotating shaft. Therefore, the crushing mechanism does not need to be specially equipped with a power device such as a motor or a hydraulic motor. Therefore, compared with the existing crushing mechanism with its own power device, the structure is greatly simplified and the space occupied is very small. Therefore, it becomes possible to apply the present invention to the mining machine for mining thinner ore seams or high-grade thin ore seams.

[0017] The present invention also omits the oil cylinder in the traditional crushing mechanism. Since the swing angle of the rocker arm is very small when mining thinner ore seams or high-grade thin ore seams, even without the large-range adjustment of the height position of the crushing teeth by the oil cylinder, the crushing mechanism can already meet the use requirements, further simplifying the structure of the crushing mechanism.

[0018] The present invention makes full use of the inner space at the corner of the L-shaped rocker arm of the mining machine, installs the main body of the crushing mechanism here, and connects it to the cutting system of the rocker arm of the mining machine through the connecting seat and the transmission system, saving installation space and solving the power source problem. It enables the installation of a crushing mechanism on the mining machine for mining thinner ore seams or high-grade thin ore seams. Therefore, it can effectively crush large-sized rock blocks, enabling the rock blocks to pass smoothly under the rocker arm of the mining machine and avoiding accumulation.

[0019] Since the bracket is provided with a split structure, and the front and rear support plates therein can adjust the height position relative to the base, and the connecting seat also has a corresponding plurality of different installation positions to match the bracket, finally the installation height of the crushing tooth assembly is adjustable, so that the present invention can meet the needs of a larger upper and lower crushing range.

[0020] The front end of the rotating shaft is splined to the transition gear. Due to the floating characteristics of the spline connection, the centering between the rotating shaft and the transition gear can be achieved, which can improve the stability of the transmission. In addition, when crushing overly hard rock blocks or getting jammed, the spline shaft breaks first, which can protect the transition gear and the transmission gear, so the reliability of the transmission can be improved.

[0021] The crushing tooth assembly can replace the traditional crushing drum, with a simple and compact structure. And when a certain crushing tooth is damaged, only the crushing tooth and its sleeve need to be replaced, which is simple and convenient for maintenance, and the manufacturing cost and use cost are lower.

[0022] Since different parameters of crushing teeth and corresponding sleeves can be installed at different positions in the front and rear of the rotating shaft according to the actual distribution characteristics of the block size of the rock blocks on the conveying trough of the conveyor in the front and rear directions, it can perform crushing more pertinently, and achieve better crushing effect with more reasonable investment.

[0023] Since the structure of the crushing tooth assembly itself is simple, and the connection structure between the crushing tooth assembly and the bracket is also simple, more sleeves can be sleeved on one rotating shaft, which means that more crushing teeth can participate in crushing, so it is easier to improve the crushing effect. Brief Description of the Drawings

[0024] Figure 1 is a cross-sectional view of an embodiment of the crushing mechanism of the present invention;

[0025] Figure 2 is a schematic diagram of the crushing mechanism when the bracket and the connecting seat are in a certain installation position state;

[0026] Figure 3 is a schematic diagram of the crushing mechanism when the bracket and the connecting seat are in another installation position state.

[0027] Reference Numerals:

[0028] 11. Base; 111. Outer side surface; 12. Pin; 13. Rotating shaft; 14. Crushing tooth; 15. Protective cover; 16. Front support plate; 17. Rear support plate; 18. First positioning pin; 19. Sleeve;

[0029] 2. Mining machine rocker arm; 21. Boom part; 211. Plane mounting surface; 213. Circular groove; 214. Rocker arm pin hole; 22. Transmission gear;

[0030] 31. Connecting seat; 32. Intermediate gear; 33. Second positioning pin. Detailed implementation mode

[0031] The present invention discloses a split crushing mechanism with rocker arm power (hereinafter referred to as the crushing mechanism), as Figures 1-3 shown, which includes a bracket, a connecting seat 31, a crushing tooth assembly and a mining machine rocker arm 2. The bracket includes a base 11, a front support plate 16 and a rear support plate 17. The base is provided with a front side plate and a rear side plate. The front and rear side plates are part of the base. The front side plate and the rear side plate are each provided with a plurality of side plate pin holes distributed from top to bottom. The front side plate and the rear side plate are symmetrical front and rear, and the specifications, quantities and positions of the side plate pin holes thereon are also the same. The front support plate and the rear support plate are each provided with a plurality of support plate pin holes, and the side plate pin holes and the support plate pin holes have the same specifications. The front support plate and the rear support plate are respectively detachably fixed to the front side plate and the rear side plate. The front support plate and the front side plate, and the rear support plate and the rear side plate are respectively positioned in the vertical plane by installing a first positioning pin 18 at at least two pairs of side plate pin holes and support plate pin holes. The base is fixed to one side of the roller part of the mining machine rocker arm, and the base and the mining machine rocker arm can be positioned by a plane and a plurality of pins 12 and fastened by screws. By changing the pairing relationship of the side plate pin holes and the support plate pin holes, of course, the front and rear side plates and the front and rear support plates need to be adjusted synchronously, the positions of the front and rear support plates can be changed, so as to change the height of the rotating shaft to meet different crushing requirements.

[0032] The connecting seat is fixed on the rear side of the arm support part of the mining machine rocker arm, and a transmission system is provided in the inner cavity of the connecting seat. The connecting seat is located in front of the front support plate and maintains a gap with the front support plate. The crushing tooth assembly includes a rotating shaft 13, a plurality of sleeves 19 sleeved side by side on the rotating shaft, and a crushing tooth 14 installed on the sleeve. The front and rear parts of the rotating shaft are respectively supported by the front support plate and the rear support plate, and the rotating shaft extends horizontally front and back. The front end of the rotating shaft passes through the front support plate and is located in the inner cavity of the connecting seat. The rear end of a transmission gear 22 in the mining machine rocker arm extends from the rear side wall of the arm support part 21 of the mining machine rocker arm and is located in the inner cavity of the connecting seat. The rear end of the transmission gear and the front end of the rotating shaft are connected by transmission through the transmission system, and the transmission gear is not coaxial with the rotating shaft. A plurality of rocker pin holes 214 are provided on the rear side of the arm support part of the mining machine rocker arm, which are distributed circumferentially with the axis of the transmission gear as the center. The connecting seat is provided with a connecting seat pin hole, and the rocker pin hole has the same specifications as the connecting seat pin hole. The angular positioning of the connecting seat relative to the axis of the transmission gear is achieved between the connecting seat and the arm support by installing a second positioning pin 33 at the connecting seat pin hole and a rocker arm pin hole. By changing the rocker arm pin hole matched with the connecting seat pin hole, the installation angle of the connecting seat can be changed, and the installation height of the rotating shaft on the connecting seat can be changed accordingly to adapt to the adjustment of the height of the rotating shaft installation position on the bracket.

[0033] If the number of side plate pin holes provided on the front side plate and the rear side plate is represented by M, and the number of support plate pin holes provided on the front support plate and the rear support plate is represented by N, M≥N, M≥3, and N≥2.

[0034] The front and rear support plates have a variety of possible installation positions relative to the front and rear side plates. Figure 2 In the middle, the pin hole of the support plate matches the pin hole of the upper side plate, and the installation position of the shaft is at the same height as the transmission gear. Figure 3 In the middle, the pin hole of the support plate is matched with the pin hole of the lower side plate, and the installation position of the shaft is moved down. Accordingly, the connecting seat needs to be compared Figure 2 The installation position in the embodiment is rotated counterclockwise by an angle. Since the installation height of the rotating shaft is adjustable, the crushing mechanism of the present invention can meet the needs of a larger upper and lower crushing range.

[0035] As part of the cutting transmission system of the rocker arm of the mining machine, the transmission gear provides power for the rotation of the rotating shaft, so the crushing mechanism does not need a special matching motor or hydraulic motor or other power device. Therefore, compared with the existing crushing mechanism with its own power device, the structure is greatly simplified and the space occupied is very small. Therefore, it is possible to apply the present invention to mining machines for mining thinner ore layers or high-grade thin ore layers.

[0036] Moreover, the present invention also omits the oil cylinder in the traditional crushing mechanism. Since the swing angle of the rocker arm is very small when mining thin ore layers or high-grade thin ore layers, even without the large-range adjustment of the height position of the crushing teeth by the oil cylinder, the crushing mechanism can already meet the usage requirements.

[0037] Since the present invention replaces the traditional crushing drum with a crushing tooth assembly, the structure becomes very simple, and both the manufacturing cost and the usage cost are lower. Moreover, due to the simple structure, more bushings can be sleeved on one rotating shaft, which means that more crushing teeth can participate in the crushing, so it is easier to improve the crushing effect.

[0038] The crushing teeth are installed on the bushings through the crushing tooth seats. A plurality of crushing tooth seats are circumferentially distributed on each bushing. The crushing teeth and the crushing tooth seats correspond to each other one by one and are detachably connected to each other. The directions of the crushing teeth on the same bushing are all arranged in the clockwise or counterclockwise direction. The bushings and the rotating shaft are connected by multiple flat keys. The multiple flat keys are circumferentially distributed, and the circumferential fixation is reliable, and it is also convenient for the axial installation and disassembly of the bushings. When a certain crushing tooth is damaged, only the crushing tooth and the bushing where it is located need to be replaced, and the maintenance is simple and convenient. Compared with the drum on the existing crusher, the crushing tooth assembly has a compact structure, saves space, and is convenient for maintenance.

[0039] Generally, the specifications and performance parameters of the crushing teeth installed on the same bushing are the same, and the specifications and performance parameters of the crushing teeth installed on different bushings can be the same or different. When the crushing tooth assembly is used on a crusher, the crushing teeth are located directly above the conveying trough of the conveyor, and the extending direction of the rotating shaft is consistent with the width direction of the conveying trough. According to the actual distribution characteristics of the block size of the rock blocks in the width direction of the conveying trough (for example, it is very likely to be non-normal distribution), crushing teeth and corresponding bushings with different parameters can be installed at different positions in the front and rear of the rotating shaft to obtain better crushing effect.

[0040] A vertical plane mounting surface 211 is provided on the side of the drum part of the rocker arm of the mining machine. This plane mounting surface is the reference surface for fixing the support bracket. The outer side surface 111 of the base is attached to the plane mounting surface.

[0041] The front and rear parts of the rotating shaft are respectively supported on the front support plate and the rear support plate through bearings. Inner end covers are installed on the sides of the front support plate and the rear support plate that are close to each other, and outer end covers are installed on the sides that are far from each other. The inner and outer end covers can axially limit the corresponding bearings from the front and rear two directions.

[0042] The inner end cover can be indirectly sleeved on the rotating shaft through a snap ring, and the snap ring can axially limit the inner ring of the corresponding bearing. All bushings are axially limited between the front and rear snap rings.

[0043] The front support plate and the rear support plate can be set to be nearly triangular. The bottom of the triangle is close to the drum part of the rocker arm of the mining machine, and the rotating shaft is installed at the top of the triangle. The support of this shape saves more space.

[0044] Preferably, a shield 15 is installed on the front support plate and the rear support plate, and the shield covers above the crushing tooth assembly. The top plate of the shield is preferably an arc cylindrical surface with the axis of the rotating shaft as the axis, and the lower edges of the front and rear side plates of the shield are respectively connected to the upper edges of the front and rear support plates.

[0045] Further, the side plate pin holes on the front side plate and the rear side plate are preferably evenly distributed in a circle centered on the axis of the transmission gear. The side plate pin holes on the front side plate and the rear side plate can be divided into multiple combinations, and each combination can be paired with the support plate pin holes on the front support plate or the rear support plate. When the support plate pin holes are paired and connected with the side plate pin holes in different combinations, the installation positions and angles of the front and rear support plates relative to the front and rear side plates will be changed.

[0046] The transmission gear can include two sections of external gears at the front and rear. The front section of the external gear is located inside the rocker arm of the mining machine and is used to participate in the transmission of the cutting transmission system. The rear section of the external gear is located inside the connecting seat and is used to output power outward. Between the front and rear sections of the external gears is a journal, and the journal is supported on the housing of the rocker arm of the mining machine through a boom bearing. The boom bearing can be installed on the housing of the rocker arm of the mining machine through a bearing seat.

[0047] A transition gear 32 is installed in the inner cavity of the connecting seat. The transition gear is externally meshed with the rear section of the external gear of the transmission gear. The transition gear is provided with an internal spline, and the front end of the rotating shaft is provided with an external spline. The front end of the rotating shaft is spline-connected to the transition gear. The front and rear ends of the transition gear can be respectively rotationally supported on the connecting seat through bearings. Due to the floating characteristics of the spline connection, the centering between the rotating shaft 13 and the transition gear 32 can be achieved, and the transmission stability can be improved. In addition, when crushing overly hard rock blocks or getting stuck, the spline shaft breaks first, which can protect the transition gear and the transmission gear, so the transmission reliability can be improved.

[0048] Further, the front end of the connecting seat is embedded in a corresponding circular groove 213 in the housing of the boom part 21 of the rocker arm of the mining machine with an outwardly convex circular stop structure. The connecting seat 31 can simultaneously act as the rear retaining ring of the boom bearing to axially limit the boom bearing.

[0049] For existing mining machines, as long as the circular groove 213, the rocker arm pin hole 214, the flat mounting surface 211 and the pin holes thereon are machined on them, the installation and positioning of the crushing mechanism can be realized.

[0050] The terms "front" and "rear" mentioned in this article respectively correspond toFigure 1 Up and down from a perspective.

Claims

1. A split crushing mechanism with rocker arm power, Features: The support comprises a bracket, a connecting seat, a crushing tooth assembly and a mining machine rocker arm, wherein the bracket comprises a base, a front support plate and a rear support plate, wherein the base is provided with a front side plate and a rear side plate, wherein the front side plate and the rear side plate are respectively provided with a plurality of side plate pin holes distributed from top to bottom, wherein the front support plate and the rear support plate are also respectively provided with a plurality of support plate pin holes, wherein the front support plate and the rear support plate are respectively detachably fixed to the front side plate and the rear side plate, and the front support plate and the front side plate, and the rear support plate and the rear side plate are respectively positioned in a vertical plane by installing first locating pins at at least two paired side plate pin holes and support plate pin holes; the base is fixed to one side of the roller portion of the mining machine rocker arm; the connecting seat is fixed to the rear side surface of the arm frame portion of the mining machine rocker arm, a transmission system is provided in the inner cavity of the connecting seat, and the connecting seat is located in front of the front support plate and maintains a gap between the front support plate; the crushing tooth assembly comprises A rotating shaft, a plurality of sleeves sleeved side by side on the rotating shaft and a crushing tooth installed on the sleeves, the front and rear of the rotating shaft are rotatably supported on the front support plate and the rear support plate respectively, and the rotating shaft extends horizontally front and back, the front end of the rotating shaft passes through the front support plate and is located in the inner cavity of the connecting seat, the rear end of a transmission gear in the mining machine rocker arm extends out from the rear side wall of the arm support part of the mining machine rocker arm and is located in the inner cavity of the connecting seat, the rear end of the transmission gear and the front end of the rotating shaft are connected through the transmission system, the transmission gear is not coaxial with the rotating shaft, and a plurality of rocker pin holes are provided on the rear side surface of the arm support part of the mining machine rocker arm and are circumferentially spaced with the axis of the transmission gear as the center, and a connecting seat pin hole is provided on the connecting seat, and the angular positioning of the connecting seat relative to the axis of the transmission gear is achieved between the connecting seat and the arm support part by installing a second locating pin at the connecting seat pin hole and a rocker pin hole.

2. The split crushing mechanism with rocker arm power as claimed in claim 1, Features: The front side plate and the rear side plate are respectively provided with M side plate pin holes, and the front support plate and the rear support plate are respectively provided with N support plate pin holes, M≥N, M≥3, N≥2.

3. The split crushing mechanism with rocker arm power as claimed in claim 2, Features: A flat mounting surface is provided on the side surface of the roller portion of the rocker arm of the mining machine, and the outer side surface of the base is attached to the flat mounting surface.

4. The split crushing mechanism with rocker arm power as claimed in claim 2, Features: The front and rear parts of the rotating shaft are supported on the front support plate and the rear support plate respectively through bearings. The front support plate and the rear support plate are both equipped with inner end covers on the sides close to each other, and are both equipped with outer end covers on the sides away from each other. The inner and outer end covers limit the corresponding bearings axially from the front and rear directions.

5. The split crushing mechanism with rocker arm power as claimed in claim 4, Features: The inner end cover is indirectly sleeved on the rotating shaft through a retaining ring. The retaining ring axially limits the inner ring of the corresponding bearing, and all the shaft sleeves are axially limited between the two retaining rings.

6. The split crushing mechanism with rocker arm power as claimed in claim 2, characterized in that: a protective cover is installed on the front support plate and the rear support plate, and the protective cover covers above the crushing tooth assembly.

7. The split crushing mechanism with rocker arm power as claimed in claim 2, 3, 4, 5 or 6, characterized in that: the side plate pin holes on the front side plate and the rear side plate are evenly distributed in a circle centered on the axis of the transmission gear.

8. The split crushing mechanism with rocker arm power as claimed in claim 1, 2, 3, 4, 5 or 6, characterized in that: the transmission gear includes two sections of external gears, the front section of the external gear is located inside the rocker arm of the mining machine, the rear section of the external gear is located inside the connecting seat, and the shaft neck is between the two sections of the external gears. The shaft neck is supported on the housing of the rocker arm of the mining machine through a boom bearing.

9. The split crushing mechanism with rocker arm power as claimed in claim 7, characterized in that: the transmission gear includes two sections of external gears, the front section of the external gear is located inside the rocker arm of the mining machine, the rear section of the external gear is located inside the connecting seat, and the shaft neck is between the two sections of the external gears. The shaft neck is supported on the housing of the rocker arm of the mining machine through a boom bearing.

10. The split crushing mechanism with rocker arm power as claimed in claim 8, characterized in that: a transition gear is installed in the inner cavity of the connecting seat. The transition gear is externally meshed with the rear section of the external gear of the transmission gear. The transition gear is provided with an internal spline, and the front end of the rotating shaft is provided with an external spline. The front end of the rotating shaft is spline-connected to the transition gear.

11. The split crushing mechanism with rocker arm power as claimed in claim 9, characterized in that: the front end of the connecting seat is embedded in the housing of the boom part of the rocker arm of the mining machine in a circular stop structure.

Images