Fixed crushing mechanism with rocker arm power

Abstract

The present invention relates to a fixed crushing mechanism with rocker arm power, including a bracket, a crushing tooth assembly and a mining machine rocker arm. The crushing tooth assembly includes a rotating shaft, a plurality of bushings arranged side by side on the rotating shaft, and crushing teeth installed on the bushings. The bracket is provided with a front support arm and a rear support arm. The front and rear parts of the rotating shaft are respectively rotatably supported on the front support arm and the rear support arm, and the rotating shaft extends horizontally forward and backward. The front end of the rotating shaft is exposed in front of the front support arm. One end of the bracket in the left-right direction is fixed on one side of the drum part of the mining machine rocker arm. The rear end of a transmission gear in the mining machine rocker arm extends out from the rear side wall of the arm frame part of the mining machine rocker arm and is in transmission connection with the front end of the rotating shaft. The present invention can be used on mining machines for mining thin ore layers or high-grade thin ore layers, effectively crushing large-sized rock blocks, enabling the rock blocks to pass smoothly under the mining machine rocker arm and avoiding 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 relatively thin ore layers or high-grade thin ore layers. Background Art

[0002] In order to adapt to the mining of relatively thin 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-back 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 amount of high-hardness bauxite rock often appears. After these bauxite rocks enter the conveyor, they need to pass under the position where the cutting motor of the boom is located. However, many of them are large-sized rocks and cannot pass through, and finally accumulate, causing 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 purpose of the present invention is to provide a fixed crushing mechanism with boom power, which can be used on a mining machine for mining relatively thin 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] A fixed crushing mechanism with boom power, comprising a bracket, a crushing tooth assembly and a mining machine boom. The crushing tooth assembly includes a rotating shaft, a plurality of bushings arranged side by side on the rotating shaft, and crushing teeth installed on the bushings. The bracket is provided with a front support arm and a rear support arm. The front and rear parts of the rotating shaft are respectively rotatably supported on the front support arm and the rear support arm, and the rotating shaft extends horizontally in the front and rear directions. The front end of the rotating shaft is exposed in front of the front support arm. The bracket is fixed on one side of the mining machine boom, and the rear end of a transmission gear in the mining machine boom extends out from the rear side wall of the mining machine boom and is in transmission connection with the front end of the rotating shaft.

[0006] A flat mounting surface is provided on the side surface of the drum part of the mining machine boom. The outer side surface of the bracket is attached to the flat mounting surface, and the bracket and the mining machine boom are positioned by a plurality of pins.

[0007] The front and rear parts of the rotating shaft can be respectively supported on the front support arm and the rear support arm through bearings. Inner end covers are installed on the sides of the front support arm and the rear support arm close to each other, and outer end covers are installed on the sides far from each other. The inner and outer end covers axially limit the corresponding bearings from the front and rear two directions.

[0008] 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.

[0009] A shield may be installed on the bracket, and the shield covers the top of the crushing tooth assembly.

[0010] The fixed crushing mechanism with rocker arm power preferably also includes a connecting seat, which is fixed on the rear side of the arm support part of the mining machine rocker arm. A transmission system is provided in the inner cavity of the connecting seat. The rear end of the transmission gear and the front end of the rotating shaft are both located in the inner cavity of the connecting seat and are connected by the transmission system. A gap is maintained between the connecting seat and the front support arm.

[0011] The transmission gear may include two front and rear sections of external gears, the front section of the external gear is located in the mining machine rocker arm, the rear section of the external gear is located in the connecting seat, and a journal is provided between the front and rear sections of the external gears, and the journal is supported on the housing of the mining machine rocker arm through an arm bearing.

[0012] A transition gear is installed in the inner cavity of the connecting seat, and the transition gear is externally meshed with the rear outer gear of the transmission gear. An internal spline is provided on the transition gear, and an external spline is provided at the front end of the rotating shaft. The front end of the rotating shaft is spline-connected with the transition gear.

[0013] The front end of the connecting seat is preferably embedded in the housing of the arm support part of the mining machine rocker arm with a circular stop structure.

[0014] The beneficial effects of the present invention are:

[0015] The crushing tooth assembly can replace the traditional crushing drum, has a simple and compact structure, and when a crushing tooth is damaged, only the crushing tooth and the shaft sleeve where it is located need to be replaced, maintenance is simple and convenient, and the manufacturing cost and use cost are lower.

[0016] Since crushing teeth and corresponding sleeves with different parameters can be installed at different front and rear positions of the rotating shaft according to the actual distribution characteristics of the rock blocks on the conveyor trough in the front and rear directions, more targeted crushing can be carried out and better crushing effect can be achieved with more reasonable investment.

[0017] Since the crushing tooth assembly itself has a simple structure and the connection structure between the crushing tooth assembly and the bracket is also simple, a larger number of sleeves can be mounted on a rotating shaft, which means that more crushing teeth can participate in crushing, thus making it easier to improve the crushing effect.

[0018] As part of the cutting drive system of the mining machine boom, the drive gear provides power for the rotation of the rotating shaft. Therefore, the crushing mechanism does not require a dedicated power device such as an electric motor or a hydraulic motor. Thus, compared with the existing crushing mechanism with its own power device, the structure is greatly simplified and the space occupation is very small. Therefore, it becomes possible to apply the present invention to a mining machine for mining thin ore seams or high-grade thin ore seams.

[0019] The present invention also omits the oil cylinder in the traditional crushing mechanism. Since the swing angle of the boom is very small when mining thin 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.

[0020] The present invention makes full use of the inner space of the L-shaped corner of the mining machine boom, installs the main body of the crushing mechanism therein, and connects it to the cutting system of the mining machine boom through a connecting seat and a drive system, which not only saves installation space but also solves the power source problem, enabling the installation of a crushing mechanism on a mining machine for mining thin 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 mining machine boom and avoiding accumulation.

[0021] The front end of the rotating shaft is spline-connected to the intermediate gear. Due to the floating characteristics of the spline connection, the centering between the rotating shaft and the intermediate gear can be achieved, improving the transmission stability. In addition, when crushing overly hard rock blocks or getting stuck, the spline shaft breaks first, which can protect the intermediate gear and the drive gear, thus improving the transmission reliability. Description of the Drawings

[0022] Figure 1 is the front view of an embodiment of the crushing mechanism of the present invention;

[0023] Figure 2 is Figure 1 the sectional view of the shown embodiment;

[0024] Figure 3 is Figure 1 the partial enlarged view of the shown embodiment.

[0025] Reference Signs:

[0026] 11. Support; 111. Outer side; 112. Front support arm; 113. Rear support arm; 12. Pin; 13. Rotating shaft; 14. Crushing tooth; 15. Protective cover; 16. Bush.

[0027] 2. Mining machine boom; 21. Boom part; 211. Plane mounting surface; 213. Circular groove; 22. Drive gear.

[0028] 31. Connecting seat; 32. Transition gear; 33. Pin. Detailed implementation mode

[0029] The present invention discloses a fixed crushing mechanism with rocker arm power, as Figures 1 - 3 shown, which includes a bracket 11, a crushing tooth assembly and a mining machine rocker arm 2. The crushing tooth assembly includes a rotating shaft 13, a plurality of bushings 16 sleeved on the rotating shaft side by side, and crushing teeth 14 installed on the bushings. The bracket is provided with a front support arm 112 and a rear support arm 113. The front and rear parts of the rotating shaft are respectively rotatably supported on the front support arm and the rear support arm, and the rotating shaft extends horizontally forward and backward. The front end of the rotating shaft is exposed in front of the front support arm. One end of the bracket in the left-right direction is fixed on one side of the drum part of the mining machine rocker arm. The rear end of a transmission gear 22 in the mining machine rocker arm extends out from the rear side of the arm frame part 21 of the mining machine rocker arm and is in transmission connection with the front end of the rotating shaft.

[0030] The crushing teeth are installed on the bushings through 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 evenly distributed, with reliable circumferential fixation and convenient axial installation and disassembly of the bushings. When a certain crushing tooth is damaged, only the crushing tooth and its corresponding bushing 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.

[0031] 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 this 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 rock block size 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.

[0032] A vertical plane mounting surface 211 is provided on the side surface of the drum part of the mining machine rocker arm. This plane mounting surface is the reference surface for fixing the bracket. The outer side surface 111 of the bracket is attached to the plane mounting surface. The bracket and the mining machine rocker arm are positioned by a plurality of pins 12 and can be fastened by screws.

[0033] The front and rear parts of the rotating shaft are supported on the front support arm and the rear support arm respectively through bearings. The front support arm and the rear support arm are provided with inner end covers on the sides close to each other and outer end covers on the sides away from each other. The inner and outer end covers can axially limit the corresponding bearings from both the front and rear directions.

[0034] The inner end cover can be indirectly sleeved on the rotating shaft through a retaining ring, and the retaining ring can axially limit the inner ring of the corresponding bearing. All shaft sleeves are axially limited between the front and rear retaining rings.

[0035] The front support arm and the rear support arm can be arranged in a nearly triangular shape, the bottom of the triangle being close to the roller part of the rocker arm of the mining machine, and the rotating shaft being arranged on the top of the triangle. This shape of the bracket saves more space.

[0036] The bracket is preferably a front-to-back symmetrical structure, so that one bracket can be installed on both the left rocker arm and the right rocker arm of the mining machine.

[0037] The bracket is preferably provided with a shield 15, which covers the crushing tooth assembly. The top plate of the shield is preferably a section of an arc-shaped cylinder 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 with the upper edges of the front and rear support arms.

[0038] The fixed crushing mechanism with rocker arm power also includes a connecting seat 31, which is fixed on the rear side of the arm support part of the mining machine rocker arm. The connecting seat and the mining machine rocker arm can be positioned by a pin 33. A transmission system is arranged in the inner cavity of the connecting seat. The rear end of the transmission gear and the front end of the rotating shaft are both located in the inner cavity of the connecting seat and are connected by the transmission system. A gap is maintained between the connecting seat and the front support arm.

[0039] 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.

[0040] In addition, the invention also eliminates the oil cylinder in the traditional crushing mechanism. Since the rocker arm has a small up and down swing angle when mining thin ore layers or high-grade thin ore layers, the crushing mechanism can meet the use requirements even without the oil cylinder to adjust the height of the crushing teeth in a large range.

[0041] 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 use cost are lower. Moreover, due to the simple structure, a larger number of bushings can be sleeved on a single rotating shaft, which means that more crushing teeth can participate in the crushing, so it is easier to improve the crushing effect.

[0042] 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 and is used to participate in the transmission of the cutting transmission system, and 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.

[0043] A transition gear 32 is installed in the inner cavity of the connecting seat, and 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, and 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 rotatably 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.

[0044] 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 in an outwardly convex circular stop structure. The connecting seat 31 can simultaneously serve as the rear retaining ring of the boom bearing to axially limit the boom bearing.

[0045] As used herein, the front and rear respectively correspond to Figure 2 up and down in terms of the viewing angle.

Claims

1. A fixed crushing mechanism with rocker arm power, Features: The invention comprises a bracket, a crushing tooth assembly, a connecting seat and a rocker arm of a mining machine, wherein a cutting drum is arranged on the front side of the arm frame part of the rocker arm of the mining machine, the crushing tooth assembly comprises a rotating shaft, a plurality of shaft sleeves which are sleeved on the rotating shaft in parallel and a crushing tooth installed on the shaft sleeve, the bracket is provided with a front supporting arm and a rear supporting arm, the front and rear parts of the rotating shaft are rotatably supported on the front supporting arm and the rear supporting arm respectively, and the rotating shaft extends horizontally front and back, and the front end of the rotating shaft is exposed in front of the front supporting arm, the bracket is fixed to one side of the cutting motor part of the rocker arm of the mining machine, the connecting seat is fixed to the rear side surface of the arm frame part of the rocker arm of the mining machine, a transmission system is arranged in the inner cavity of the connecting seat, a rear end of a transmission gear in the rocker arm of the mining machine extends out from the rear side wall of the rocker arm of the mining machine, the rear end of the transmission gear and the front end of the rotating shaft are both located in the inner cavity of the connecting seat, and are connected by transmission through the transmission system, and a gap is maintained between the connecting seat and the front supporting arm.

2. The fixed crushing mechanism with rocker arm power as claimed in claim 1, Features: A plane mounting surface is provided on the side of the cutting motor part of the mining machine rocker arm, and the outer side surface of the bracket is attached to the plane mounting surface. The bracket and the mining machine rocker arm are positioned by a plurality of pins.

3. The fixed crushing mechanism with rocker arm power as claimed in claim 1, Features: The front and rear parts of the rotating shaft are supported on the front support arm and the rear support arm respectively through bearings. The front support arm and the rear support arm are equipped with inner end covers on the sides close to each other, and outer end covers are equipped with the sides away from each other. The inner and outer end covers limit the corresponding bearings axially from the front and rear directions.

4. The fixed crushing mechanism with rocker arm power as claimed in claim 3, 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.

5. The fixed crushing mechanism with rocker arm power as claimed in claim 1, Features: The bracket is a front-to-back symmetrical structure.

6. A fixed crushing mechanism with rocker arm power as claimed in claim 1, 2, 3, 4 or 5, Features: A shield is installed on the bracket, and the shield covers the top of the crushing tooth assembly.

7. A fixed crushing mechanism with rocker arm power as claimed in claim 1, 2, 3, 4 or 5, Features: The transmission gear includes two front and rear external gears, the front external gear is located in the mining machine rocker arm, and the rear external gear is located in the connecting seat. There is a journal between the front and rear external gears, and the journal is supported on the housing of the mining machine rocker arm through an arm bearing.

8. The fixed crushing mechanism with rocker arm power as claimed in claim 7, Features: A transition gear is installed in the inner cavity of the connecting seat, and the transition gear is externally meshed with the rear outer gear of the transmission gear. An internal spline is provided on the transition gear, and an external spline is provided at the front end of the rotating shaft. The front end of the rotating shaft is spline-connected with the transition gear.

9. The fixed crushing mechanism with rocker arm power as described in claim 8, characterized in that: the front end of the connecting seat is embedded in the shell of the boom part of the mining machine rocker arm in a circular stop structure.

10. The fixed crushing mechanism with rocker arm power as described in claim 6, characterized in that: the transmission gear includes two sections of external gears, the front section of the external gear is located inside the mining machine rocker arm, the rear section of the external gear is located inside the connecting seat, and the shaft neck is between the two sections of external gears. The shaft neck is supported on the shell of the mining machine rocker arm through a boom bearing.

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