Auxiliary loading mechanism of rocker arm of suspended body coal mining machine and suspended body coal mining machine

Abstract

The present application relates to a kind of auxiliary loading mechanism of rocker arm of suspended machine body coal mining machine and suspended machine body coal mining machine, the auxiliary loading mechanism includes the machine body of coal mining machine, coal shovel plate, center shaft and torsion spring, the center shaft is along front and back direction and is passed through the lower end of the machine body left and right direction towards the side of rocker arm and the upper end of corresponding side coal shovel plate, the hinge of machine body and coal shovel plate is realized, the front and back ends of center shaft are detachably fixed on the machine body, at least two torsion springs are set on a center shaft, the two ends of torsion spring are respectively resisted on the machine body and coal shovel plate;The suspended machine body coal mining machine includes auxiliary loading mechanism and support skid shoe, the rear end of coal shovel plate covers the part of the side of support skid shoe from the outside of left and right direction.The present application can keep the effective contact of coal shovel plate and floor, improve loading effect, when not need loading, also can make coal shovel plate separate from floor, to ensure that the discharge of machine body under floating material and the passability of coal mining machine.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of auxiliary loading mechanism of rocker arm of suspended machine body coal mining machine, it is applicable to the coal mining machine for thin or very thin coal seam exploitation. BACKGROUND

[0002] For the exploitation of thin or very thin coal seam, developing high-power suspended machine body coal mining machine becomes a trend.The so-called suspended machine body refers to the main part of coal mining machine is arranged in the side of conveyor close to coal wall type, the purpose is to solve the overpass clearance of support and coal mining machine, coal mining machine and the overpass space of conveyor, the space of the parts of coal mining machine itself, etc.Problems, however, for the low exploitation thickness of very thin coal seam, the gap of suspended machine body relative to roof (upper), floor (lower) It is small itself, when installing small diameter roller, the loading effect is poor, and the coal rock is easily left behind the roller and accumulated under the suspended machine body, so that the fluctuation ability of machine body to floor is insufficient, and finally the equipment is stuck and other problems occur.

[0003] Reference Figure 7 、 8 For the above problems, the industry has proposed to set a floating coal baffle 911 on the rocker arm bracket shell 91 close to the rear of the roller, in order to use the roller loading characteristics to assist in loading floating coal to improve the loading effect, however, when encountering complex geological conditions (such as cutting fault, thicker dirt band), a large amount of rock is accumulated on the floor, the floating coal baffle is not easy to contact with the floor, resulting in weakened material blocking effect, a large amount of rock enters the lower part of the machine body 92, resulting in significantly weakened adaptability of the machine body to the fluctuating floor, and in severe cases, the machine body is lifted to the roof or the equipment is stuck and other problems occur, which seriously affects normal production, and the problem is difficult to handle, time-consuming and labor-intensive, and affects the yield.

[0004] At the same time, the floating coal baffle corresponding to the rear rocker arm is pressed down by coal and gangue, which makes it difficult to discharge the coal and rock under the machine body, further affecting the adaptability of the machine body; the floating coal baffle installed on the rocker arm bracket fluctuates with the rocker arm, and the coal blocking effect below is further affected. SUMMARY

[0005] The present application aims to provide a kind of auxiliary loading mechanism of rocker arm of suspended machine body coal mining machine, which can maintain effective contact between the coal shovel plate and the floor and improve the loading effect.

[0006] The main technical solutions of the present application are:

[0007] A kind of auxiliary loading mechanism of suspension machine body coal mining machine rocker arm, including the machine body of coal mining machine, coal shovel plate, center shaft and torsion spring, the center shaft is along front and back direction and is passed through the lower end of the machine body left and right direction towards rocker arm side and the upper end of corresponding side coal shovel plate, the front and back ends of center shaft are detachably fixedly connected on the machine body, at least two torsion springs are set on a center shaft, the two ends of torsion spring are respectively resisted on the machine body and coal shovel plate.

[0008] The lower end of the machine body towards rocker arm side is equipped with at least two curved groove structures, the notch of curved groove is outward and downward, the upper end of the coal shovel plate is equipped with multiple hinged seats, there is a torsion spring between the two hinged ears of each hinged seat, and the hinged ear and torsion spring are located in the curved groove.

[0009] The main profile of the curved groove structure can be inner cylindrical surface, the upper edge of the notch of the curved groove structure is upwardly inclined inclined plane, and the lower edge of the notch of the curved groove structure is downwardly inclined first inclined plane tangent to the main profile.

[0010] The upper end of the torsion spring is resisted on the upper edge of the notch of the curved groove structure, the second inclined plane is provided between the two hinged ears of the hinged seat, the lower end of the torsion spring is resisted on the second inclined plane, and the included angle between the upper edge of the notch of the curved groove structure and the second inclined plane is smaller than the included angle between the upper and lower ends of the torsion spring in the free state within the entire swing angle range of the coal shovel plate relative to the machine body.

[0011] The top surface profile of the hinged ear is outer cylindrical surface, and in the installed state, it is coaxial with the main body of the curved groove structure and a gap is maintained therebetween.

[0012] The edge of the upper end of the coal shovel plate other than the hinged seat is preferably arranged to form a mutual butt joint with the corresponding edge of the machine body.

[0013] The side surface of the coal shovel plate towards the rocker arm is preferably a plane, and the lower part of the side surface away from the rocker arm and the bottom surface are preferably continuous convex curved surfaces.

[0014] The auxiliary loading mechanism of suspension machine body coal mining machine rocker arm further preferably includes an auxiliary chain, the upper end of the auxiliary chain is connected to the rocker arm, and the lower end is connected to the side surface of the coal shovel plate towards the rocker arm, and the length of the auxiliary chain should ensure that the corresponding side coal shovel plate can be lifted by the auxiliary chain to leave the floor when the rocker arm is in the maximum upward swing angle position.

[0015] A suspension machine body coal mining machine includes a support shoe and the auxiliary loading mechanism of suspension machine body coal mining machine rocker arm, the support shoe is supported on the front side shovel plate of the conveyor below the machine body, and the rear end of the coal shovel plate covers part of the side surface of the support shoe from the outside in the left and right directions.

[0016] The beneficial effects of the present application are:

[0017] The downward pressure of the coal shoveling plate by the torsion spring can keep the coal shoveling plate in contact with the floor, thus preventing the coal gangue from entering the space below the machine body. By providing multiple torsion springs, a large enough torsional force can be provided within the entire swing range of the coal shoveling plate to maintain effective contact between the coal shoveling plate and the floor, thus improving the coal blocking effect.

[0018] Due to the downward swing allowance A of the coal shoveling plate, even if the machine body changes up and down due to the floor undulation, the coal shoveling plate can still be in close contact with the floor at all times, thus ensuring the coal blocking effect.

[0019] Due to the provision of the auxiliary chain, the coal shoveling plate can be lifted when the top cutting knife of the rocker arm is lifted, so that even the part of the thin layer of floating material generated when the floor undulation is cut can be easily discharged from below the machine body without affecting the passage of the coal mining machine, thus maintaining the sufficient undulation adaptability of the coal mining machine to the floor and roof.

[0020] Since the auxiliary loading mechanism is close to the end of the rocker arm connected to the machine body, whether the rocker arm is adjusted to swing or not, the auxiliary chain remains in a non-stressed state, and the coal shoveling plate can be in close contact with the floor at all times, thus ensuring the coal blocking effect.

[0021] The rear end of the coal shoveling plate covers part of the side surface of the support shoe from the outside in the left-right direction, and the coal shoveling plate and the support shoe can jointly block the cross section of the space below the machine body on the side of the conveyor trough, thus greatly improving the coal gangue blocking effect. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a top view of the auxiliary loading mechanism of the present application installed and arranged on the coal mining machine;

[0023] Figure 2 is a side view of the auxiliary loading mechanism of the present application installed and arranged on the coal mining machine (roll not shown) ;

[0024] Figure 3 is an enlarged view of Figure 2 the auxiliary loading mechanism;

[0025] Figure 4 is a sectional view of the auxiliary loading mechanism;

[0026] Figure 5 is a partial enlarged view of Figure 4 ;

[0027] Figure 6 is a state diagram of the two auxiliary loading mechanisms on the left and right when the front rocker arm cutting knife and the rear rocker arm cutting top knife of the coal mining machine;

[0028] Figure 7Fig. 1 is a plan view of the installation arrangement structure of the existing coal baffle plate;

[0029] Figure 8 Fig. 2 is a front-rear direction view of the installation arrangement structure of the existing coal baffle plate.

[0030] Reference signs:

[0031] 11. coal baffle plate; 110. hinged lug; 111. bottom surface; 112. second inclined surface; 113. side surface; 12. central shaft; 13. torsion spring; 131. upper end; 132. lower end; 14. auxiliary chain;

[0032] 2. rocker arm;

[0033] 3. machine body; 31. housing; 311. lower end; 312. upper edge of slot; 313. lower edge of slot; 32. support shoe;

[0034] 91. arm support housing; 911. floating coal baffle plate; 92. machine body. DETAILED DESCRIPTION

[0035] The present application discloses a kind of auxiliary loading mechanism of rocker arm of suspended machine body coal mining machine (can be simply referred to as auxiliary loading mechanism), as shown in Fig. Figures 1-6 The central shaft is detachably fixedly connected (for example, threaded connection) on the machine body at its front and rear ends, to facilitate the disassembly and assembly of the auxiliary loading mechanism. At least two torsion springs are sleeved on the central shaft, and the two ends of the torsion spring are respectively abutted on the machine body and the coal baffle plate. During the reciprocating movement of the coal mining machine, the coal baffle plate is in contact with the floor under the downward pressure of the torsion spring, so that the coal gangue is prevented from entering the space below the machine body. By arranging multiple torsion springs, a large enough torsional force can be provided within the entire swing range of the coal baffle plate to maintain the effective contact between the coal baffle plate and the floor.

[0036] The lower end of the machine body towards the rocker arm side is provided with at least two curved groove structures, and the slot of the curved groove is outward and inclined downward. The so-called outward refers to left and right for the curved grooves on the left and right sides of the machine body, respectively, and the middle part of the machine body is "out". The upper end of the coal baffle plate is provided with multiple hinged seats, and the central shaft passes through the shaft hole of the hinged seat. There is a torsion spring between the two hinged lugs 110 of each hinged seat, and the hinged lug and the torsion spring are located in the curved groove.

[0037] The main profile of the curved groove structure is an inner cylindrical surface with a central angle not more than 180 degrees, the upper edge 312 of the slot of the curved groove structure is an upwardly inclined oblique plane, and the upper edge of the slot is outward relative to the main profile, the lower edge 313 of the slot of the curved groove structure is a downwardly inclined first oblique plane tangent to the main profile. The inclination angle of the first oblique plane determines the maximum downward and inward swing position of the coal shovel plate.

[0038] The upper end 131 of the torsion spring abuts against the upper edge of the slot of the curved groove structure. A second oblique plane 112 is provided between the two hinged ears of the hinged seat, and the lower end 132 of the torsion spring abuts against the second oblique plane. The second oblique plane is downwardly and outwardly inclined when the coal shovel plate is in the vertical orientation. The included angle between the upper edge of the slot of the curved groove structure and the second oblique plane is always smaller than the included angle between the upper and lower ends of the torsion spring in the free state, that is, the torsion spring is always in a stressed state within the entire swing angle range of the coal shovel plate relative to the machine body. The length of the lower part of the hinged ear of the coal shovel plate should not be too short, and should be determined according to the fluctuation of the bottom plate, so that the coal shovel plate has sufficient downward swing allowance A, and can maintain effective contact with the bottom plate even when passing through the low-lying part of the bottom plate.

[0039] The top surface profile of the hinged ear is an outer cylindrical surface, which is theoretically coaxial with the main profile of the curved groove structure and maintains a gap therebetween in the installed state, so that the coal shovel plate can freely and smoothly swing within the designed swing angle range. There is no cooperation requirement between the center shaft and the coal shovel plate and the torsion spring. The side surface 113 of the hinged ear facing away from the rocker arm can be a plane tangent to the top surface of the hinged ear. When the side surface 113 touches the lower edge of the slot, the coal shovel plate swings downwardly and inwardly to the limit position.

[0040] The edge of the coal shovel plate other than the upper end hinged seat is preferably configured to form a mutual butt joint with the corresponding edge of the machine body, for example, the convex edge of the machine body corresponds to the concave edge of the coal shovel plate, and the concave edge of the machine body corresponds to the convex edge of the coal shovel plate, and the complement of such edge shape should be applicable within the designed swing angle range of the coal shovel plate. This design can reduce the gap between the upper end of the coal shovel plate and the machine body, and minimize or avoid the coal gangue entering the lower part of the machine body through the gap.

[0041] The side surface of the coal shovel plate facing the rocker arm is preferably a plane, and the lower part of the side surface facing away from the rocker arm and the bottom surface 111 are preferably continuous convex curved surfaces, so that the coal shovel plate has sufficient thickness, which is beneficial to improve the structural strength of the coal shovel plate.

[0042] Further, the side surface of the coal shovel plate facing the rocker arm and the bottom surface are preferably rounded.

[0043] The auxiliary loading mechanism of the suspension shearer rocker arm further preferably comprises an auxiliary chain 14, the upper end of which is connected to the rocker arm and the lower end of which is connected to the side of the coal shoveling plate facing the rocker arm, the length of the auxiliary chain should ensure that the corresponding side coal shoveling plate can be pulled up by the auxiliary chain to leave the floor when the rocker arm is in the upward maximum swing angle position, and the height of the lowest part of the coal shoveling plate can be further made close to the height of the bottom surface of the machine body. In the embodiment shown in the drawings, the upper and lower ends of the auxiliary chain are respectively hinged to the rocker arm and the coal shoveling plate, and the hinge axes extend forward and backward. The auxiliary chain uses a section of steel chain. By providing the auxiliary chain, the coal shoveling plate can be pulled up when the cutting top knife on the rocker arm is lifted up, so that even the part of the thin layer of floating material generated when cutting the floor due to the undulation of the floor can be easily discharged from below the machine body without affecting the passing of the shearer, and the undulation adaptability of the shearer to the floor and roof is maintained.

[0044] The upper end of the auxiliary chain is connected as close as possible to the rocker arm near the coal shoveling plate, for example, to the bottom of the end of the rocker arm near the machine body. When the cutting bottom rocker arm swings, the auxiliary chain still remains in a non-stressed state and does not affect the close contact of the coal shoveling plate with the bottom.

[0045] The present application also discloses a suspension shearer, which comprises a support shoe 32 and the auxiliary loading mechanism of the suspension shearer rocker arm, the support shoe is supported on the front side coal shoveling plate of the conveyor below the machine body, the front end of the coal shoveling plate can be flush with the front end of the machine body, and the rear end of the coal shoveling plate covers part of the side surface of the support shoe from the outside in the left-right direction. When the shearer walks left and right, the coal shoveling plate and the support shoe jointly block the space section below the machine body on the side of the conveyor bank, which can greatly improve the effect of blocking coal and gangue.

[0046] For a double rocker arm shearer, the suspension shearer rocker arm auxiliary loading mechanism is installed on the left and right sides of the machine body, which corresponds to the left rocker arm and the right rocker arm respectively, and is used for blocking coal and gangue from entering below the machine body from the left side and the right side respectively.

[0047] The front and rear directions in the present application are consistent with the left and right directions in the Figure 3 respectively.

Claims

1. A swing-boom auxiliary loading mechanism for a coal mining machine, characterized by: The auxiliary chain, the machine body of the coal mining machine, the coal shoveling plate, the central shaft and the torsion spring, the central shaft penetrates the machine body along the front and back direction, and the lower end of the machine body towards the side of the rocker arm and the upper end of the corresponding side of the coal shoveling plate are hinged, the front and back ends of the central shaft are detachably fixed on the machine body, at least two torsion springs are sleeved on the central shaft, and the two ends of the torsion spring are respectively abutted on the machine body and the coal shoveling plate, under the downward pressing of the torsion spring on the coal shoveling plate, the coal shoveling plate is in contact with the bottom plate, the upper end of the auxiliary chain is connected to the rocker arm, and the lower end is connected to the side of the coal shoveling plate towards the rocker arm, and the length of the auxiliary chain should ensure that the corresponding side of the coal shoveling plate can be lifted by the auxiliary chain to be away from the bottom plate when the rocker arm is in the maximum upward swing angle position.

2. The swing-boom auxiliary loading mechanism of claim 1, wherein: The lower end of the machine body towards the side of the rocker arm is provided with at least two curved groove structures, the groove opening of the curved groove structure is outward and downward inclined, and the upper end of the coal shoveling plate is provided with a plurality of hinge seats, and there is a torsion spring between the two hinge ears of each hinge seat, and the hinge ear and the torsion spring are located in the curved groove.

3. A swing body coal cutter rocker arm assisted loading mechanism as claimed in claim 2 wherein: The main contour of the curved groove structure is an inner cylindrical surface, the upper edge of the groove of the curved groove structure is an upward inclined inclined plane, and the lower edge of the groove of the curved groove structure is a downward inclined first inclined plane tangent to the main contour.

4. A swing body coal cutter jib auxiliary loading mechanism as claimed in claim 3 wherein: The upper end of the torsion spring is abutted on the upper edge of the groove of the curved groove structure, a second inclined plane is arranged between the two hinge ears of the hinge seat, the lower end of the torsion spring is abutted on the second inclined plane, and the included angle between the upper edge of the groove of the curved groove structure and the second inclined plane is smaller than the included angle between the upper and lower ends of the torsion spring in the free state within the entire swing angle range of the coal shoveling plate relative to the machine body.

5. The swing-boom auxiliary loading mechanism of claim 3, wherein: The top surface profile of the hinge ear is an outer cylindrical surface, which is coaxial with the main body of the curved groove structure in the installed state and maintains a gap therebetween.

6. A swing body coal cutter boom auxiliary loading mechanism as claimed in claim 2, 3, 4 or 5 wherein: The edge of the upper end of the coal shoveling plate other than the hinge seat is arranged to form a mutual butt joint with the corresponding edge of the machine body.

7. A swing body coal cutter boom assist loading mechanism as claimed in claim 1, 2, 3, 4 or 5 wherein: The side of the coal shoveling plate towards the rocker arm is a plane, and the lower part of the side away from the rocker arm and the bottom surface are continuous outer convex curved surfaces.

8. A swing body coal cutter jib auxiliary loading mechanism as claimed in claim 7 wherein: The side of the coal shoveling plate towards the rocker arm and the bottom surface are circularly transitioned.

9. A suspended body coal mining machine characterized by: The auxiliary loading mechanism of the rocker arm of the suspension machine body coal mining machine comprises a support shoe and the suspension machine body coal mining machine rocker arm auxiliary loading mechanism according to any one of claims 1-8, the support shoe is supported on the front side coal shoveling plate of the conveyor below the machine body, and the rear end of the coal shoveling plate covers part of the side of the support shoe from the outside in the left and right directions.

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