CN214811416U - Crushing tooth assembly and crusher - Google Patents

Abstract

The utility model relates to a crushing tooth assembly and a crusher, wherein the crushing tooth assembly comprises a connecting shaft and a plurality of crushing tooth groups, each crushing tooth group comprises a shaft sleeve and a plurality of crushing teeth fixed on the periphery of the shaft sleeve, and the plurality of crushing tooth groups are sleeved side by side and circumferentially fixed on the connecting shaft; the crusher comprises a mining machine rocker arm, a fixed seat, a swing arm and a crushing tooth assembly, wherein the fixed seat is fixed on the rocker arm, one end of the swing arm is provided with a tubular structure extending forwards and backwards, the tubular structure is hinged on the fixed seat, the front end and the rear end of a rotary shaft are respectively and rotatably supported at the front end and the rear end of an inner cavity of the tubular structure, the front end and the rear end of a connecting shaft are respectively and rotatably supported on a front arm frame and a rear arm frame which are arranged at the other end of the swing arm, and the front part of the rotary shaft is in transmission connection with the front part of the connecting shaft through a transmission system which is arranged in the inner cavity of the front arm frame. The utility model discloses a broken tooth can partly be changed, consequently can reduce use cost, breaker compact structure can be used to the aluminium ore mining machine of thinner seam mining.

Description

Crushing tooth assembly and crusher

Technical Field

The utility model relates to a breaker that is used for breaker on mining machine's broken tooth subassembly and has adopted this broken tooth subassembly.

Background

For crushers used on mining machines, the crushing teeth are often susceptible to damage due to the need to crush high hardness rock pieces. The crusher roller of the existing structure is mostly of an integral structure, and the damage of the crushing teeth often causes the whole roller to be scrapped, so that the use and maintenance cost of the crusher is higher.

In addition, in order to adapt to mining of a thinner ore layer or a high-grade thin ore layer, for example, a rocker arm of a high-power (high-torque) cutting system is generally adopted on an bauxite mining machine, the height of the rocker arm is low, the structure is compact, the power density is high, and a cutting motor arranged in a rocker arm shell occupies a large space in the front-back direction, so that a space between the cutting motor and a cable trough is insufficient for arranging a conventional crushing device. However, in the actual exploitation of the mining machine, a large amount of high-hardness bauxite often can appear, and these bauxite need pass through below the position where the cutting motor of rocking arm is located after entering the conveyer, but a lot of rocks are massive rocks, can not pass through, finally pile up and lead to the conveyer can't carry, need to shut down and carry out artifical clearance, waste time and energy, still influence the productivity.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a broken tooth subassembly and breaker, wherein broken tooth support portion changes, and use cost is lower, and breaker compact structure can use on the mining machine of exploitation thinner ore deposit or high-grade ore deposit.

The utility model discloses a main technical scheme has:

the utility model provides a broken tooth subassembly, includes connecting axle and the broken tooth group of a plurality of, every broken tooth group includes an axle sleeve and fixes a plurality of broken toothholders in the axle sleeve periphery, all installs a broken tooth on every broken toothholder, and each broken tooth week equipartition in same broken tooth group, and each broken tooth is whole according to clockwise or anticlockwise installation, and is a plurality of broken tooth group overlaps side by side through respective axle sleeve and establishes on the connecting axle, through the hookup of many flat keys between axle sleeve and the connecting axle, circumference equipartition between the flat key of many places.

The specification and performance parameters of all crushing teeth in the same crushing tooth group are the same, and the specification and performance parameters of the crushing teeth in different crushing tooth groups are the same or different.

A crusher comprises a mining machine rocker arm, a fixed seat, a swing arm, an oil cylinder and a crushing tooth assembly, wherein a shell of the mining machine rocker arm is an L-shaped structural unit comprising a barrel and an arm support, the barrel extends forwards and backwards, the arm support extends leftwards and rightwards, the barrel is positioned behind one end of the arm support, the fixed seat, the swing arm and the oil cylinder are arranged on the inner side of a corner of the L shape, the fixed seat is fixedly connected to the side surface of the barrel, the shell of the swing arm comprises a front arm support, a rear arm support and a tubular structure, the tubular structure extends forwards and backwards, the front arm support and the rear arm support both extend leftwards and rightwards, one end of each of the front arm support and the rear arm support is respectively connected with the front part and the rear part of the tubular structure, the shell of the swing arm is horizontally hinged on the fixed seat in a front-to-back mode by taking the tubular structure as an axis, one end of the oil cylinder is hinged on the fixed seat, the other end of the shell of the swing arm is hinged on the swing arm, the front end and the rear end of the connecting shaft are respectively and rotatably supported on the front arm support and the rear arm support, the front part of the rotating shaft is in transmission connection with the front part of the connecting shaft through a transmission system positioned in the inner cavity of the front arm support, the front end of the rotating shaft is provided with an internal spline, the rear end of a transmission gear in the arm support is provided with an internal spline, and the transmission gear and the rotating shaft are simultaneously connected with the front part and the rear part of a spline shaft.

The front part of the rotating shaft is provided with an external gear, the front part of the connecting shaft is provided with an external spline, the front end and the rear end of the external spline on the connecting shaft are rotatably supported on the front side wall and the rear side wall of the front arm support, the transmission system is a fixed shaft gear transmission system, a first gear of the fixed shaft gear transmission system is externally engaged with the external gear on the rotating shaft according to the transmission direction, and a last gear of the fixed shaft gear transmission system is sleeved on the connecting shaft and is connected with the front spline of the connecting shaft.

A main shell is arranged outside the rear arm frame on the shell of the swing arm, and a base plate is arranged or not arranged between the rear arm frame and the main shell in the front-rear direction.

The fixing base can include end plate, preceding backup pad and back backup pad, fixed connection can be dismantled respectively to the one end of preceding backup pad and back backup pad on the front and back side of end plate, the other end overhang, tubular structure supports respectively on preceding backup pad and back backup pad in both ends around, tubular structure's anterior and the rear portion of cantilever crane are through circular tang structure location connection, and circular tang structure is coaxial with the revolving axle.

The crusher also preferably comprises a mechanical protection structure, the mechanical protection structure comprises a support and a plurality of rollers mounted on the support, the support is fixed on the front arm support, the rollers are arranged in an arc-shaped area with the axis of the connecting shaft as the axis at intervals, the axis of the rollers horizontally extends forwards and backwards, the positions of the rollers are lower than the connecting shaft, and the farthest distance from the edge of the roller to the axis of the connecting shaft is greater than the radius of a cutting circle of the crushing teeth.

The support can be U-shaped, the arrangement region of the roller is deviated to the position of a quarter circular arc on one side of the symmetrical center line of the U-shape, and the wheel edge of the roller is partially exposed outside the radial outer edge of the semicircular part of the U-shape.

The mechanical protection is preferably symmetrical front to back.

The utility model has the advantages that:

the crushing tooth assembly can replace a traditional crushing roller, the structure is very simple and compact, when a certain crushing tooth is damaged, only the crushing tooth and a shaft sleeve where the crushing tooth is located need to be replaced, the maintenance is simple and convenient, and the manufacturing cost and the use cost are lower.

Because the crushing teeth and the corresponding shaft sleeves with different parameters are arranged at different positions in the front and back of the connecting shaft according to the actual distribution characteristics of the lumpiness of the rock blocks on the conveying groove of the conveyor in the front and back directions, the rock blocks can be crushed more pertinently, and a better crushing effect can be achieved with more reasonable investment.

A power device is not arranged on the swing arm serving as the main body of the crusher, and only a power input end is arranged, so that the volume of the swing arm is greatly reduced, especially the space occupation in the front-back direction is reduced, and the swing arm can be applied to a mining machine with a short machine body. And the structure of the swing arm itself becomes simple.

Because a drive gear of the mining machine cutting drive system is used as a power device to provide power for the swing arm, the swing arm is arranged on the inner side of the L-shaped corner of the mining machine swing arm, so that the mounting space is saved, and the problem of a power source is solved, and a crushing mechanism can be arranged on a mining machine for mining a thin ore layer or a high-grade thin ore layer, thereby effectively crushing large-block rock blocks, enabling the rock blocks to smoothly pass through the lower part of the mining machine swing arm and avoiding accumulation.

The transmission from the cutting transmission system to the transmission system of the swing arm is connected through the spline shaft, so that overload protection is realized, the transmission stability is improved, and the floating connection of the spline can improve the alignment between the swing arm shell and the transmission gear, so that the transmission stability is improved.

As the swing arm shell is provided with the split type detachable connection structure, the split type crusher can adapt to various conveyors with different widths by arranging or not arranging the base plates in the front-back direction between the rear arm support and the main shell body and increasing or decreasing the thickness of the base plates.

Due to the fact that the mechanical protection structure is arranged, when the swing arm swings downwards, the mechanical protection structure can be in contact with the top surface of the front side ledge of the conveyor firstly, the lowest height of the crushing teeth is limited, and the crushing teeth can be effectively prevented from damaging the conveyor located right below the crushing teeth.

Drawings

FIG. 1 is a schematic structural view of one embodiment of a crushing tooth assembly of the present invention;

FIG. 2 is a radial cross-sectional view of one embodiment of the crushing tooth assembly of the present invention;

fig. 3 is a radial cross-sectional view of another embodiment of the crushing tooth assembly of the present invention;

fig. 4 is a schematic structural view of an assembly body formed by the swing arm and the crushing tooth assembly;

fig. 5 is a schematic structural diagram of an assembly body formed by the swing arm, the fixed seat, the oil cylinder and the crushing tooth assembly;

FIG. 6 is a schematic structural view of an embodiment of the crusher;

fig. 7 is a schematic view of the situation of the shearer's rocker arm downswing with the crusher near the conveyor.

Reference numerals:

11. a fixed seat; 12. a housing of the swing arm; 121. a front arm support; 122. a rear arm support; 124. a transmission system; 1241. a rotating shaft; 1242. a connecting shaft; 125. crushing the set of teeth 125'; 1251. a shaft sleeve; 1252. a flat bond; 1253. crushing teeth; 126. a shield; 127. a tubular structure; 13. an oil cylinder; 14. a mechanical protective structure; 141. a support; 143. a roller;

2. a mining machine rocker arm;

3. a spline shaft;

9. a conveyor; 91. the top surface of the front ledge.

Detailed Description

The utility model discloses a broken tooth subassembly, as shown in fig. 1-7, including connecting axle 1242 and the broken tooth group 125 of a plurality of, every broken tooth group includes an axle sleeve 1251 and fixes a plurality of broken tooth 1253 in the axle sleeve periphery. The crushing teeth can be arranged on the shaft sleeve through the crushing tooth holder. Every broken toothholder all installs a broken tooth, and each broken tooth is whole according to clockwise or anticlockwise circumference equipartition installation, and is a plurality of broken tooth group overlaps side by side through respective axle sleeve and establishes on the connecting axle, couples through many flat keys 1252 between the axle sleeve of broken tooth group and the connecting axle, and circumference equipartition between the many flat keys, circumference are fixed reliable, make things convenient for the axial of axle sleeve to install and remove moreover. When a certain broken tooth is damaged, only the broken tooth and the shaft sleeve where the broken tooth is located need to be replaced, and the maintenance is simple and convenient.

The specification and performance parameters of all crushing teeth in the same crushing tooth group are the same, and the specification and performance parameters of the crushing teeth in different crushing tooth groups are the same or different. When the crushing tooth assembly is used on a crusher, the crushing teeth are positioned above a conveying groove of the conveyor 9, and the extending direction of the connecting shaft is consistent with the width direction of the conveying groove. According to the actual distribution characteristics of the rock mass in the width direction of the conveying groove, the crushing teeth and the corresponding shaft sleeves with different parameters are arranged at different positions in front of and behind the connecting shaft, so that a better crushing effect is obtained.

The utility model also discloses a breaker, including mining machine rocking arm 2, fixing base 11, swing arm, hydro-cylinder 13 and broken tooth subassembly, the casing of mining machine rocking arm is the L shape constitutional unit including barrel and cantilever crane two parts, extend around the barrel, extend about the cantilever crane, the barrel is located the rear of the one end of cantilever crane. The fixing seat, the swing arm and the oil cylinder are arranged on the inner side of the corner of the L shape, and the fixing seat is fixedly connected to the side face of the barrel. The housing 12 of the swing arm comprises a front arm frame 121, a rear arm frame 122 and a tubular structure 127, wherein the tubular structure extends forwards and backwards, the front arm frame and the rear arm frame both extend leftwards and rightwards, and one end of each of the front arm frame and the rear arm frame is respectively connected with the front part and the rear part of the tubular structure. The shell of the swing arm is horizontally hinged on the fixed seat in a front-back direction by taking the tubular structure as a shaft. One end of the oil cylinder is hinged to the fixed seat, and the other end of the oil cylinder is hinged to the shell of the swing arm. A rotating shaft 1241 is arranged in the inner cavity of the tubular structure, and the front and rear ends of the rotating shaft are rotatably supported by the front and rear ends of the inner cavity of the tubular structure through bearings, respectively. The inner cavity of the front arm support is communicated with the inner cavity of the front part of the tubular structure. The front end and the rear end of the connecting shaft are respectively and rotatably supported on the front arm support and the rear arm support, and the rotating shaft is parallel to the connecting shaft. The front and rear arm frames have the function of limiting the shaft sleeve forwards and backwards. The front part of the rotating shaft is in transmission connection with the front part of the connecting shaft through a transmission system 124 positioned in the inner cavity of the front arm support. The front end of the revolving shaft is provided with an internal spline, the rear end of a transmission gear 22 in the arm support is provided with an internal spline, and the transmission gear and the revolving shaft are simultaneously connected with the front spline and the rear spline of a spline shaft 3. Due to the floating nature of the spline connection, it is possible to provide alignment between the housing 12 of the swing arm and the drive gear 22, thus improving the stability of the transmission. In addition, when the hard rock is crushed or the rock is jammed, the spline shaft is broken first to protect the cutting transmission system and the transmission system of the crushing mechanism in the front arm support, so that the transmission reliability can be improved.

As a mining machine rocking arm's cutting transmission system's part, drive gear does the swing arm (specifically be broken tooth subassembly) provides the power supply, consequently the swing arm does not need power device such as independent supporting motor or hydraulic motor, compares the structure that current power device and breaker cylinder axial connected gradually, and the front and back size of broken mechanism is for shortening greatly, compares current power device setting at the inside structure of breaker cylinder, the utility model discloses a swing arm is equivalent to about traditional breaker cylinder department and also corresponding reduction of size about with, it is visible the utility model discloses a structure is more compact, consequently will the utility model discloses a swing arm is applied to and becomes possible on the mining machine of thinner ore layer or high-grade thin ore layer exploitation. Moreover, because the utility model discloses replace traditional crushing cylinder with broken tooth subassembly, the structure becomes very simple, and manufacturing cost and use cost are lower.

The front part of the rotating shaft is provided with an external gear, the front part of the connecting shaft is provided with an external spline, and the front end and the rear end of the external spline on the connecting shaft are rotatably supported on the front side wall and the rear side wall of the front arm support. The transmission system is a fixed shaft gear transmission system, according to the transmission direction, a first gear of the transmission system is externally engaged with an external gear on the rotating shaft, and a last gear of the transmission system is sleeved on the connecting shaft and connected with a front spline of the connecting shaft.

A main shell is arranged outside the rear arm frame on the shell of the swing arm, and a base plate is arranged or not arranged between the rear arm frame and the main shell in the front-rear direction. The rear arm support, the main shell and the base plate can be connected in a positioning mode through a plurality of pin shafts. When the base plate is arranged, the distance between the front arm support and the rear arm support is larger than that when no base plate is arranged, so that the crushing mechanism can adapt to a wider conveyor. Of course, longer crushing tooth assemblies, i.e., longer connecting shafts, and additional bushings and crushing teeth on the connecting shafts, need to be replaced at the same time.

The fixing seat is a mounting base structural part of the shell of the swing arm, and not only supports the shell of the swing arm, but also provides a swinging axis for the shell of the swing arm. The fixing base includes end plate, preceding backup pad and back backup pad, encloses into C shape structure, fixed connection can be dismantled respectively on the front and back side of end plate to the one end of preceding backup pad and back backup pad, the other end overhang, tubular structure supports respectively on preceding backup pad and back backup pad in both ends around, tubular structure's anterior and the rear portion of cantilever crane are passed through circular tang structure location and are connected, and circular tang structure is coaxial with the revolving axle to the relative mining machine rocking arm of axis when keeping the casing swing of swing arm is fixed.

Furthermore, a front wear-resistant sleeve can be arranged between the front supporting plate and the tubular structure, and a rear wear-resistant sleeve can be arranged between the rear supporting plate and the tubular structure. The front and rear wear-resistant sleeves are respectively tightly matched with the front and rear ends of the tubular structure and are respectively in clearance fit with the front and rear supporting plates. The front and rear wear-resistant sleeves can reduce the wear of the tubular structure and prolong the service life of the shell of the swing arm.

The shell and the fixed seat of the swing arm can be in an up-and-down symmetrical structure, so that the shell and the fixed seat of the same swing arm can be used at the left rocker arm and the right rocker arm of the mining machine.

The crusher further comprises a mechanical protection structure 14, the mechanical protection structure comprises a support 141 and a plurality of rollers 143 mounted on the support, the support is detachably fixed on the front arm support, the rollers can freely rotate relative to the support, the rollers are arranged in an arc-shaped area with the axis of the connecting shaft as the axis at intervals in the circumferential direction, the axis of the rollers horizontally extends in the front-back direction, the positions of the rollers are lower than the connecting shaft, and the farthest distance from the edge of each roller to the axis of the connecting shaft is larger than the radius of a cutting circle of each crushing tooth. When the crusher is close to the conveyor, the roller is firstly contacted with the top surface 91 of the front ledge of the conveyor, the distance S (see fig. 7) is kept between the cutting circle of the crushing teeth and the top surface of the front ledge, and the distance from the cutting circle of the crushing teeth to the conveying groove is larger, so that the damage of the crushing teeth to the conveyor can be avoided.

Due to the arranged rollers, when the swing arm and the top surface of the front side ledge of the conveyor move relatively in a contact mode, the mechanical protection structure is only in line contact with the conveyor, and sliding abrasion of a contact area is small.

The support is U-shaped, the arrangement area of the idler wheel is deviated to the position of a quarter circular arc on one side of the symmetrical center line of the U-shape, and the wheel edge of the idler wheel is partially exposed on the outer side of the radial outer edge of the semicircular part of the U-shape.

The mechanical guard structure is preferably symmetrical front to back, allowing interchangeability when mounted to the left and right crushers of the miner.

A shield 126 is also mounted on the housing of the swing arm and covers over the breaker tooth assembly and is biased towards the pivot axis to prevent upward splashing of the broken rock. The shroud may also be of symmetrical fore and aft construction to maintain its interchangeability of mounting on crushers on both the left and right sides of the miner.

Claims (10)

1. A crushing tooth assembly characterized by: including connecting axle and the broken tooth group of a plurality of, every broken tooth group includes an axle sleeve and fixes a plurality of broken toothholders in the axle sleeve periphery, all installs a broken tooth on every broken toothholder, and each broken tooth week equipartition in same broken tooth group, and each broken tooth is whole to be installed according to clockwise or anticlockwise, and is a plurality of broken tooth group overlaps side by side through respective axle sleeve and establishes on the connecting axle, through the hookup of many flat keys between axle sleeve and the connecting axle, circumference equipartition between the flat key of many places.

2. The breaker tooth assembly of claim 1 wherein: the specification and performance parameters of all crushing teeth in the same crushing tooth group are the same, and the specification and performance parameters of the crushing teeth in different crushing tooth groups are the same or different.

3. A crusher, characterized by: the mining machine rocker arm comprises a mining machine rocker arm, a fixed seat, a swing arm, an oil cylinder and the crushing tooth assembly as claimed in claim 1 or 2, wherein a shell of the mining machine rocker arm is an L-shaped structural unit comprising a barrel and an arm support, the barrel extends forwards and backwards, the arm support extends leftwards and rightwards, the barrel is positioned behind one end of the arm support, the fixed seat, the swing arm and the oil cylinder are arranged on the inner side of a corner of the L shape, the fixed seat is fixedly connected to the side surface of the barrel, the shell of the swing arm comprises a front arm support, a rear arm support and a tubular structure, the tubular structure extends forwards and backwards, the front arm support and the rear arm support both extend leftwards and rightwards, one end of each of the front arm support and the rear arm support is respectively connected with the front part and the rear part of the tubular structure, the shell of the swing arm is horizontally hinged to the fixed seat from front to back by taking the tubular structure as an axis, one end of the oil cylinder is hinged to the fixed seat, and the other end of the shell of the swing arm is hinged to the swing arm, the front end and the rear end of the connecting shaft are respectively and rotatably supported on the front arm support and the rear arm support, the front part of the rotating shaft is in transmission connection with the front part of the connecting shaft through a transmission system positioned in the inner cavity of the front arm support, the front end of the rotating shaft is provided with an internal spline, the rear end of a transmission gear in the arm support is provided with an internal spline, and the transmission gear and the rotating shaft are simultaneously connected with the front part and the rear part of a spline shaft.

4. A crusher as claimed in claim 3, characterized in that: the front part of the rotating shaft is provided with an external gear, the front part of the connecting shaft is provided with an external spline, the front end and the rear end of the external spline on the connecting shaft are rotatably supported on the front side wall and the rear side wall of the front arm support, the transmission system is a fixed shaft gear transmission system, a first gear of the fixed shaft gear transmission system is externally engaged with the external gear on the rotating shaft according to the transmission direction, and a last gear of the fixed shaft gear transmission system is sleeved on the connecting shaft and is connected with the front spline of the connecting shaft.

5. The crusher of claim 4, wherein: a main shell is arranged outside the rear arm frame on the shell of the swing arm, and a base plate is arranged or not arranged between the rear arm frame and the main shell in the front-rear direction.

6. The crusher of claim 5, wherein: the fixing base includes end plate, preceding backup pad and back backup pad, fixed connection can be dismantled respectively to the one end of preceding backup pad and back backup pad on the front and back side of end plate, the other end overhang, tubular structure supports respectively on preceding backup pad and back backup pad in both ends around, tubular structure's anterior and the rear portion of cantilever crane are through circular tang structure location connection, and circular tang structure is coaxial with the revolving axle.

7. The crusher of claim 3, 4, 5 or 6, characterized in that: the crushing tooth grinding machine is characterized by further comprising a mechanical protection structure, wherein the mechanical protection structure comprises a support and a plurality of rollers mounted on the support, the support is fixed on the front arm support, the rollers are arranged in an arc-shaped area with the axis of the connecting shaft as the axis at intervals, the axis of the rollers horizontally extends forwards and backwards, the positions of the rollers are lower than the connecting shaft, and the farthest distance from the edge of the roller to the axis of the connecting shaft is larger than the radius of a cutting circle of the crushing tooth.

8. The crusher of claim 7, wherein: the support is U-shaped, the arrangement area of the idler wheel is deviated to the position of a quarter circular arc on one side of the symmetrical center line of the U-shape, and the wheel edge of the idler wheel is partially exposed on the outer side of the radial outer edge of the semicircular part of the U-shape.

9. The crusher of claim 8, wherein: the mechanical protection structure is symmetrical front and back.

10. The crusher of claim 7, wherein: and a shield is also arranged on the shell of the swing arm, and the shield is covered above the crushing tooth assembly and deviates to the rotating shaft.

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