Milling machine angle adjusting mechanism for coal mine

Abstract

An angle adjusting mechanism of a milling machine for a coal mine comprises a walking machine body, an angle adjusting box body is installed on the walking machine body through a first pin shaft, lifting oil cylinders are installed on the two sides between the walking machine body and the angle adjusting box body in a hinged mode, piston rods of the lifting oil cylinders stretch out and draw back to drive the angle adjusting box body to rotate up and down, and a rotating shaft capable of rotating is installed in the angle adjusting box body. An adjusting box body is installed on a walking machine body through a first pin shaft, a milling arm and a milling drum are installed in the adjusting box body through a rotating shaft, a lifting oil cylinder is installed between the walking machine body and the adjusting box body, and an angle adjusting oil cylinder is installed between the adjusting box body and the milling arm. The milling drum can swing up and down and axially under the control of the lifting oil cylinder and the angle adjusting oil cylinder, so that the milling drum can be suitable for repairing uneven floor heaves in roadways, the number of operators can be effectively reduced, the labor intensity of the operators can be reduced, the floor heave repairing efficiency can be improved, and the repairing quality in the roadways can be guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of underground coal mine mechanical equipment, in particular to an angle adjustment mechanism for a coal mine milling machine. Background Art

[0002] When working underground in coal mines, in order to ensure the normal movement of equipment and eliminate the problem of tunnel floor drum, milling machine is one of the necessary equipment. Since the tunnel floor drum is generally uneven, it is necessary to adjust the angle of the milling drum to better repair the tunnel. However, most of the current milling machines are not equipped with an angle adjustment mechanism. After using the milling machine to perform preliminary treatment on the floor drum, the tunnel repair team is still needed to manually or semi-mechanize the remaining floor drum repair work. Not only is the efficiency low and the bottom plate repair effect poor, but the labor intensity is high, the number of operators is large, and there are certain safety hazards. Utility Model Content

[0003] The utility model aims to provide an angle adjustment mechanism for a coal mine milling machine, which can repair an uneven bottom drum in a tunnel by adjusting the position of a milling drum on the milling machine, thereby solving the problems in the prior art.

[0004] The technical solution adopted by the utility model to solve its technical problems is: an angle adjustment mechanism of a coal mine milling machine, comprising a walking body, an angle adjustment box body is installed on the walking body through a first pin shaft, lifting cylinders are hingedly installed on both sides between the walking body and the angle adjustment box body, and the piston rod of the lifting cylinder can drive the angle adjustment box body to rotate up and down, a rotatable rotary shaft is installed in the angle adjustment box body, the end of the rotary shaft extending out of the angle adjustment box body is fixedly connected with a milling arm, and a milling drum is installed at one end of the milling arm away from the angle adjustment box body, two groups of angle adjustment cylinders are hingedly installed between the angle adjustment box body and the milling arm, when the piston rod of one angle adjustment cylinder is extended and the piston rod of the other angle adjustment cylinder is retracted, the rotary shaft can drive the milling arm and the milling drum to rotate and swing relative to the angle adjustment box body. A slewing bearing frame is installed in the angle adjustment box body, and a first flange ring is provided at one end of the slewing bearing frame located in the angle adjustment box body, a first slewing bearing is installed in the first flange ring, an outer ring of the first slewing bearing is fixedly installed on the first flange ring, an inner ring of the first slewing bearing is fixedly installed on the end of the slewing shaft through a pressure plate, a second flange ring is provided at the other end of the slewing bearing frame, a second slewing bearing is installed in the second flange ring, an outer ring of the second slewing bearing is fixedly installed on the second flange ring, a pressure ring is fixedly installed on the outer end surface of the inner ring of the second slewing bearing, the pressure ring is fitted on the outer periphery of the slewing shaft, and the slewing shaft can rotate relative to the slewing bearing frame and the angle adjustment box body through the first slewing bearing and the second slewing bearing. An inner lining plate is provided between the slewing support frame and the angle adjustment box body, an upper support plate is provided on the upper part of the inner side of the inner lining plate, a lower support plate is provided on the lower part of the inner side of the inner lining plate, the slewing support frame is located between the upper support plate and the lower support plate, a connecting bolt is installed on the angle adjustment box body, a threaded hole matching the connecting bolt is opened on the slewing support frame, a tensioning bolt is also installed on the angle adjustment box body, a wedge plate and a wire plate are provided between the slewing support frame and the lower support plate, a through hole matching the tensioning bolt is opened on the wedge plate, a threaded hole matching the tensioning bolt is opened on the wire plate, an avoidance groove for allowing the connecting bolt and the tensioning bolt to pass through is opened on the inner lining plate, and rotating the tensioning bolt can allow the wedge plate to move closer to or away from the inner lining plate. The angle adjustment box and the milling arm are both equipped with corresponding cylinder articulated seats, the angle adjustment cylinder is installed between the cylinder articulated seats, each cylinder articulated seat includes ear plates arranged side by side, the ear plates are provided with through holes, the second pin shaft is matched in the through holes, a detachable limit plate is provided on the ear plates, the second pin shaft is provided with a limit slot matched with the limit plate, the limit slot is located on the outside of the ear plate, the cylinder end and the piston rod end of the angle adjustment cylinder are both provided with earrings that are gap matched with the second pin shaft, and the outer periphery of the second pin shaft on the upper and lower sides of the earring is also provided with a spacer sleeve, and the spacer sleeve is located between the ear plate and the earring. The angle adjustment box is provided with a connecting sleeve that matches the first pin shaft, and a bushing is also provided between the connecting sleeve and the first pin shaft. A detachable limit semi-ring plate is installed on the housing of the walking body, and a limit ring groove that matches the limit semi-ring plate is provided at the end of the first pin shaft extending out of the walking body.A convex ring flange is provided at the end of the rotary shaft, and the convex ring flange is fixedly mounted on the milling arm by bolts.

[0005] The positive effect of the utility model is that the angle adjustment mechanism of the coal mine milling machine described in the utility model has an adjustment box installed on the walking body through a first pin shaft, a milling arm and a milling drum are installed in the adjusting box through a rotating shaft, a lifting cylinder is installed between the walking body and the adjusting box, and an angle adjustment cylinder is installed between the adjusting box and the milling arm. The milling drum can be swung up and down and axially through the control of the lifting cylinder and the angle adjustment cylinder, so it can be suitable for repairing uneven bottom drums in tunnels, which can not only effectively reduce the number of operators and reduce the labor intensity of staff, but also improve the efficiency of bottom drum repair and ensure the repair quality in the tunnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0007] Figure 2 It is the front view of the utility model;

[0008] Figure 3 It is a partial cross-sectional view of the angle adjustment box;

[0009] Figure 4 It is a top view of the angle adjustment box;

[0010] Figure 5 yes Figure 3 A partial enlarged view of middle I;

[0011] Figure 6 yes Figure 3 A partial enlarged view of middle II;

[0012] Figure 7 yes Figure 3 Middle AA section view;

[0013] Figure 8 It is a structural diagram of the cylinder articulated seat;

[0014] Fig. 9 yes Figure 2 Partial view of the BB section view. DETAILED DESCRIPTION

[0015] The utility model discloses an angle adjustment mechanism for a coal mine milling machine, such as Figure 1 and Figure 2 As shown, it includes a walking body 1, on which an angle adjustment box 3 is installed through a first pin shaft 2. The angle adjustment box 3 can rotate relative to the walking body 1, and both sides between the walking body 1 and the angle adjustment box 3 are hingedly installed with a lifting cylinder 4. The extension and retraction of the piston rod of the lifting cylinder 4 can drive the angle adjustment box 3 to rotate up and down.

[0016] A rotatable rotary shaft 5 is installed in the angle adjustment box 3, and the end of the rotary shaft 5 extending out of the angle adjustment box 3 is fixedly connected to a milling arm 6, and a milling drum 7 is installed at the end of the milling arm 6 away from the angle adjustment box 3. Two groups of angle adjustment cylinders 8 are hingedly installed between the angle adjustment box 3 and the milling arm 6. When the piston rod of one angle adjustment cylinder 8 is extended and the piston rod of the other angle adjustment cylinder 8 is retracted, the rotary shaft 5 can drive the milling arm 6 and the milling drum 7 to rotate and swing relative to the angle adjustment box 3.

[0017] By controlling the lifting cylinder 4, the milling drum 7 can be moved up and down in the tunnel, thereby achieving the purpose of cutting and lying down. Under the control of the angle adjustment cylinder 8, the milling drum 7 can be swung left and right in the tunnel, thereby achieving the purpose of repairing the tunnel when the ground is uneven.

[0018] In order to ensure that the rotary shaft 5 can drive the milling drum 7 to rotate and swing when the angle adjustment cylinder 8 is in motion, the rotary shaft 5 needs to be axially positioned in the angle adjustment box 3, such as Figure 3-6 As shown, a slewing support frame 9 is installed in the angle adjustment box 3, and a first flange ring 10 is provided at one end of the slewing support frame 9 located in the angle adjustment box 3. A first slewing support 11 is installed in the first flange ring 10. The outer ring of the first slewing support 11 is fixedly installed on the first flange ring 10, and the inner ring of the first slewing support 11 is fixedly installed on the end of the slewing shaft 5 through a pressure plate 12.

[0019] The other end of the slewing support frame 9 is provided with a second flange ring 13, in which a second slewing support 14 is fitted, the outer ring of the second slewing support 14 is fixedly mounted on the second flange ring 13, and a pressure ring 15 is fixedly mounted on the outer end surface of the inner ring of the second slewing support 14, and the pressure ring 15 is fitted on the outer periphery of the slewing shaft 5. The slewing shaft 5 can rotate relative to the slewing support frame 9 and the angle adjustment box 3 through the first slewing support 11 and the second slewing support 14.

[0020] The first slewing bearing 11 and the second slewing bearing 14 meet the strength requirements during operation, and are fixedly connected to the flange ring through the outer ring, and the inner ring is fixedly connected to the pressure plate 12 and the pressure ring 15. While realizing the rotation of the slewing shaft 5 relative to the angle adjustment box 3, the slewing shaft 5 is also limited in the axial length direction.

[0021] Furthermore, in order to position and install the slewing support frame 9 on the angle adjustment box 3 and realize the tightening of the slewing support, as shown in FIG. Figure 7As shown, an inner lining plate 16 is provided between the slewing support frame 9 and the angle adjustment box 3, an upper support plate 17 is provided at the upper part of the inner side of the inner lining plate 16, a lower support plate 18 is provided at the lower part of the inner side of the inner lining plate 16, and the slewing support frame 9 is located between the upper support plate 17 and the lower support plate 18. A connecting bolt 19 is installed on the angle adjustment box 3, and a threaded hole matching the connecting bolt 19 is provided on the slewing support frame 9, so as to realize the connection and fixation of the slewing support frame 9 on the angle adjustment box 3.

[0022] A tensioning bolt 20 is also installed on the angle adjustment box 3, and a wedge plate 21 and a wire plate 22 are provided between the slewing support frame 9 and the lower support plate 18. The wedge plate 21 is provided with a through hole that matches the tensioning bolt 20, and the wire plate 22 is provided with a threaded hole that matches the tensioning bolt 20. The inner lining plate 16 is provided with an avoidance groove that allows the connecting bolt 19 and the tensioning bolt 20 to pass through. Rotating the tensioning bolt 20 can allow the wedge plate 21 to move closer to or away from the inner lining plate 16.

[0023] Due to the arrangement of the upper and lower inclined surfaces of the wedge plate 21, in the process of rotating the tension bolt 20, the wedge plate 21 moves closer to or away from the inner lining plate 16, which will increase or decrease the distance between the lower support plate 18 and the slewing support frame 9, and the distance between the upper support plate 17 and the lower support plate 18 will not change. That is, the slewing support frame 9 is tightened and installed between the upper support plate 17 and the lower support plate 18 by moving the wedge plate 21, and the tension degree of the slewing support frame 9 and its upper slewing member can be adjusted by rotating the tension bolt 20, so as to facilitate the smooth rotation of the slewing shaft 5.

[0024] The rotation and swing adjustment of the milling drum 7 can be completed by the rotation of the rotary shaft 5 and the opposite extension and contraction of the two sets of angle adjustment cylinders 8. If the articulated connection method of the angle adjustment cylinder 8 here adopts a joint bearing, there is a disadvantage of large vibration during milling, and the joint bearing cylinder is easily damaged, resulting in insufficient reliability and low production efficiency.

[0025] To solve the above problem, the angle adjustment box 3 and the milling arm 6 are both equipped with corresponding cylinder hinge seats, and the angle adjustment cylinder 8 is installed between the cylinder hinge seats. Figure 8 As shown, each cylinder articulated seat includes ear plates 23 arranged side by side, a through hole is opened on the ear plate 23, a second pin shaft 24 is arranged in the through hole, a detachable limit plate 25 is arranged on the ear plate 23, a limit slot 26 matching with the limit plate 25 is opened on the second pin shaft 24, and the limit slot 26 is located on the outer side of the ear plate 23, so as to realize the positioning and installation of the second pin shaft 24 on the ear plate 23.

[0026] The cylinder end and piston rod end of the angle adjustment oil cylinder 8 are both provided with earrings 27 that are clearance-matched with the second pin shaft 24. A spacer 28 is also mounted on the outer periphery of the second pin shaft 24 on the upper and lower sides of the earring 27. The spacer 28 is located between the ear plate 23 and the earring 27. When the piston rod of the angle adjustment oil cylinder 8 is extended or retracted, the spacer 28 can be slightly deformed to allow the milling drum 7 to rotate and swing within a certain small range relative to the angle adjustment box 3. The above-mentioned structure is more compact, different from the joint bearing connection mode, and can effectively reduce the vibration amplitude during milling operation and extend the service life of the angle adjustment oil cylinder 8.

[0027] Furthermore, in order to realize the installation connection between the first pin shaft 2 and the angle adjustment box 3 and the walking machine body 1, as shown in FIG. Fig. 9 As shown, the angle adjustment box 3 is provided with a connecting sleeve 29 matched with the first pin shaft 2, and a bushing 30 is also provided between the connecting sleeve 29 and the first pin shaft 2. The bushing 30 can reduce friction to a certain extent and extend the service life of the pin shaft. A detachable limiting semi-ring plate 31 is installed on the shell of the walking body 1, and a limiting ring groove 32 matched with the limiting semi-ring plate 31 is provided at the end of the first pin shaft 2 extending out of the walking body 1. The two limiting semi-ring plates 31 can fix the first pin shaft 2 to the walking body 1.

[0028] Furthermore, in order to realize the installation connection between the rotary shaft 5 and the milling arm 6, a convex ring flange 33 is provided at the end of the rotary shaft 5, and the convex ring flange 33 is fixedly mounted on the milling arm 6 by bolts.

[0029] The technical solution of the present invention is not limited to the scope of the embodiments described in the present invention. The technical contents not described in detail in the present invention are all known technologies.

Claims

1. An angle adjustment mechanism for a coal mine milling machine, characterized in that: The invention comprises a walking machine body (1), an angle adjustment box body (3) is installed on the walking machine body (1) via a first pin shaft (2), lifting cylinders (4) are hingedly installed on both sides between the walking machine body (1) and the angle adjustment box body (3), the piston rod of the lifting cylinder (4) can drive the angle adjustment box body (3) to rotate up and down by extension, a rotatable rotary shaft (5) is installed in the angle adjustment box body (3), the end of the rotary shaft (5) extending out of the angle adjustment box body (3) is fixedly connected to a milling arm (6), and a milling drum (7) is installed at one end of the milling arm (6) away from the angle adjustment box body (3), and two groups of angle adjustment cylinders (8) are hingedly installed between the angle adjustment box body (3) and the milling arm (6), and when the piston rod of one angle adjustment cylinder (8) is extended and the piston rod of the other angle adjustment cylinder (8) is retracted, the rotary shaft (5) can drive the milling arm (6) and the milling drum (7) to rotate and swing relative to the angle adjustment box body (3).

2. The angle adjustment mechanism of a coal mine milling machine according to claim 1, characterized in that: A slewing bearing frame (9) is installed in the angle adjustment box (3); a first flange ring (10) is provided at one end of the slewing bearing frame (9) located in the angle adjustment box (3); a first slewing bearing (11) is installed in the first flange ring (10); an outer ring of the first slewing bearing (11) is fixedly installed on the first flange ring (10); an inner ring of the first slewing bearing (11) is fixedly installed on the end of the slewing shaft (5) via a pressure plate (12); and a second flange ring (10) is provided at the other end of the slewing bearing frame (9). A blue ring (13) is provided, and a second slewing bearing (14) is fitted inside the second flange ring (13). The outer ring of the second slewing bearing (14) is fixedly mounted on the second flange ring (13). A pressure ring (15) is fixedly mounted on the outer end surface of the inner ring of the second slewing bearing (14). The pressure ring (15) is fitted around the outer periphery of the slewing shaft (5). The slewing shaft (5) can rotate relative to the slewing bearing frame (9) and the angle adjustment box (3) through the first slewing bearing (11) and the second slewing bearing (14).

3. The angle adjustment mechanism of a coal mine milling machine according to claim 2, characterized in that: An inner lining plate (16) is provided between the slewing support frame (9) and the angle adjustment box (3), an upper support plate (17) is provided at the upper part of the inner side of the inner lining plate (16), a lower support plate (18) is provided at the lower part of the inner side of the inner lining plate (16), the slewing support frame (9) is located between the upper support plate (17) and the lower support plate (18), a connecting bolt (19) is installed on the angle adjustment box (3), a threaded hole matching the connecting bolt (19) is opened on the slewing support frame (9), and a tensioning bolt (19) is also installed on the angle adjustment box (3). The bolt (20), a wedge plate (21) and a thread plate (22) are provided between the slewing support frame (9) and the lower support plate (18), the wedge plate (21) is provided with a through hole matched with the tensioning bolt (20), the thread plate (22) is provided with a threaded hole matched with the tensioning bolt (20), the inner lining plate (16) is provided with an avoidance groove for allowing the connecting bolt (19) and the tensioning bolt (20) to pass through, and the rotation of the tensioning bolt (20) can allow the wedge plate (21) to move closer to or away from the inner lining plate (16).

4. The angle adjustment mechanism of a coal mine milling machine according to claim 1, characterized in that: The angle adjustment box (3) and the milling arm (6) are both provided with corresponding cylinder articulated seats, the angle adjustment cylinder (8) is installed between the cylinder articulated seats, each cylinder articulated seat comprises ear plates (23) arranged side by side, the ear plates (23) are provided with through holes, a second pin shaft (24) is arranged in the through holes, a detachable limit plate (25) is arranged on the ear plates (23), the second pin shaft (24) is provided with a limit slot (26) matched with the limit plate (25), the limit slot (26) is located on the outer side of the ear plate (23), the cylinder end and the piston rod end of the angle adjustment cylinder (8) are both provided with ear rings (27) which are clearance matched with the second pin shaft (24), and a spacer (28) is also sleeved on the outer periphery of the second pin shaft (24) on the upper and lower sides of the ear ring (27), and the spacer (28) is located between the ear plate (23) and the ear ring (27).

5. The angle adjustment mechanism of a coal mine milling machine according to claim 1, characterized in that: The angle adjustment box (3) is provided with a connecting sleeve (29) matched with the first pin shaft (2), and a bushing (30) is further provided between the connecting sleeve (29) and the first pin shaft (2). A detachable limiting semi-ring plate (31) is installed on the shell of the walking body (1), and a limiting ring groove (32) matched with the limiting semi-ring plate (31) is provided at the end of the first pin shaft (2) extending out of the walking body (1).

6. The angle adjustment mechanism of a coal mine milling machine according to claim 1, characterized in that: A convex ring flange (33) is provided at the end of the rotary shaft (5), and the convex ring flange (33) is fixedly mounted on the milling arm (6) by means of bolts.

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