Width-adjustable coal mining machine rocker arm

Abstract

The utility model discloses a width-adjustable coal mining machine rocker arm, and relates to the field of coal mining machine rocker arm devices. The width-adjustable coal mining machine rocker arm comprises a rocker arm shell, a hinge block and a screw rod; the rocker arm shell comprises a front sealing cavity and a rear sealing cavity; a first bearing, a first oil seal, a second oil seal, a first oil injection nozzle and a second oil injection nozzle are arranged in the front sealing cavity. The motor is started, the output end of the motor can drive the screw to rotate, along with rotation of the screw, a planet carrier formed by the stud and the pressing plate can rotate along with the screw, the screw and the movement mechanism generate relative displacement in the axial direction of the screw, relative displacement is generated between the rocker arm shell and the hinge block, and therefore the rocker arm shell and the hinge block can move relatively. The width of the rocker arm can be adjusted, the overall width of the rocker arm can be adjusted more quickly and flexibly, the rocker arm can adapt to different matching relations under the condition that the rocker arm is not replaced, a better beveling feed coal cutting space can be flexibly provided for the coal mining machine, and damage of coal walls, rocks and the like to a machine body of the coal mining machine is reduced.

Description

Technical Field

[0001] The present application relates to the field of shearer rocker arm devices, and particularly to an adjustable-width shearer rocker arm. Background Art

[0002] The shearer rocker arm is an important working device of the shearer, which plays the role of coal cutting and loading.

[0003] Due to the space size limitation of the current three-machine matching of the shearer, while ensuring the reliable structure of the transmission system and the gears meeting the strength requirements, some shearers also require the same type of shearer rocker arm to adapt to conveyors of different widths, so as to meet different matching requirements without replacing the shearer rocker arm.

[0004] In the prior art, some shearer rocker arms are of an integral structure and cannot adjust the width. Although other shearer rocker arms also have articulated transition blocks, after being fixed by various fastening devices, if the width needs to be adjusted again, it requires a large amount of work. Moreover, when the shearer cuts the coal obliquely, the relative position between the shearer rocker arm and the shearer body will cause the coal wall or rock to hit the shearer body, thus affecting the safety of the shearer body. Utility Model Content

[0005] In order to facilitate width adjustment and improve safety, the present application provides an adjustable-width shearer rocker arm.

[0006] An adjustable-width shearer rocker arm provided by the present application adopts the following technical solution: An adjustable-width shearer rocker arm includes a rocker arm housing, an articulated block, and a screw. The rocker arm housing includes a front sealing cavity and a rear sealing cavity. In the front sealing cavity, a first bearing, a first oil seal, a second oil seal, a first oil injection nozzle, and a second oil injection nozzle are respectively arranged, and the first bearing, the first oil seal, and the first oil injection nozzle are respectively arranged at corresponding positions on the rocker arm housing. A sealing cover is provided in the front sealing cavity, a first sealing ring is provided in the sealing cover, and the second oil seal is arranged on the sealing cover. A first screw is provided on the sealing cover and is installed on the rocker arm housing through the first screw.

[0007] A motor is provided outside the front sealing cavity. The motor is arranged on the rocker arm housing. A screw is fixedly installed at the output end of the motor. A brake is arranged at the other end of the motor. The brake is connected to the rotor of the motor. A first screw hole is opened on the side of the front sealing cavity.

[0008] An end cover is provided in the rear sealing cavity. A third oil seal and a second sealing ring are provided on the end cover. A second screw is provided on the end cover and is installed on the rocker arm housing through the second screw. A second bearing and a sealing seat are provided on the rear sealing cavity. A fourth oil seal and a third sealing ring are provided on the sealing seat. A second screw hole is opened on the side of the rear sealing cavity.

[0009] A motion mechanism is provided on the hinge block. The motion mechanism includes a housing, a rotating block, a stud, a pressing plate, a retaining ring, and a cylindrical pin. A number of studs are installed between the pressing plates. The two pressing plates are installed on both sides of the housing by cylindrical pins, and a number of tooth-shaped track grooves are provided on the inner wall of the pressing plates. The two ends of the stud are connected to the rotating block. A number of tooth-shaped guide rails are provided at both ends of the stud, and a retaining ring is provided on the outside of the rotating block. A number of third screws are provided on the housing and installed on the hinge block through the third screws. Two upper and lower T-shaped tracks are provided on the rocker arm housing, and two upper and lower grooves are provided on the hinge block.

[0010] By adopting the above technical solution, by starting the motor, the output end of the motor will drive the screw rod to rotate. As the screw rod rotates, the planetary carrier formed by the stud and the pressing plate will rotate accordingly. Through the relative displacement between the screw rod and the motion mechanism in the axial direction of the screw rod, a relative displacement is generated between the rocker arm housing and the hinge block, so as to achieve the function of adjusting the width of the rocker arm.

[0011] Preferably, there are two second U-shaped grooves in the middle of the sealing cover.

[0012] By adopting the above technical solution, the second U-shaped groove can play an auxiliary role in use.

[0013] Preferably, there are two third U-shaped grooves in the middle of the end cover. An annular groove is provided at one end of the end cover, and two round holes are provided in the annular groove.

[0014] By adopting the above technical solution, the round holes facilitate installation.

[0015] Preferably, there are two fourth U-shaped grooves provided in the middle of the sealing seat.

[0016] By adopting the above technical solution, the fourth U-shaped groove can play an auxiliary role in installation.

[0017] Preferably, one end of the housing near the front sealing cavity is square with a flange step, and the middle part is cylindrical.

[0018] By adopting the above technical solution, by setting one end of the housing near the front sealing cavity to be square with a flange step and the middle part to be cylindrical, it is convenient for installation and use.

[0019] Preferably, the axial direction of the cylindrical pin is parallel to the axial direction of the screw rod.

[0020] By adopting the above technical solution, since the axial direction of the cylindrical pin is parallel to the axial direction of the screw rod, it is convenient for use.

[0021] Preferably, at one end of the rocker arm housing close to the hinge block, there are two T-shaped tracks each on the upper and lower sides.

[0022] By adopting the above technical solution, by providing the T-shaped tracks, a limiting function can be achieved.

[0023] Preferably, at one end of the hinge block close to the rocker arm housing, there are two grooves each on the upper and lower sides.

[0024] By adopting the above technical solution, by providing the grooves, an auxiliary installation function can be achieved.

[0025] Preferably, two first U-shaped grooves are provided at a position of the front sealing cavity close to the first oil seal.

[0026] By adopting the above technical solution, by providing the first U-shaped grooves, an auxiliary installation function can be achieved.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. In the present application, with the cooperation of components such as a motor, by starting the motor, the output end of the motor will drive the screw to rotate. As the screw rotates, the planet carrier formed by the stud and the pressing plate will also rotate. Through the relative displacement of the screw and the moving mechanism in the axial direction of the screw, a relative displacement is generated between the rocker arm housing and the hinge block, achieving the function of adjusting the width of the rocker arm, and enabling the overall width of the rocker arm to be adjusted more quickly and flexibly. It can adapt to different matching relationships without replacing the rocker arm, and can also flexibly provide a better inclined cutting and coal cutting space for the shearer, reducing damage to the shearer body by the coal wall, rock, etc.

[0029] 2. In the present application, with the cooperation of components such as the first oil injection nozzle, lubricating oil is respectively injected into the first screw hole and the second screw hole from the first oil injection nozzle and the second oil injection nozzle. The lubricating oil passes through the annular groove and enters the sealing cavity from the round hole, thereby lubricating the first bearing or the second bearing, and further improving the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a schematic diagram of the overall structure of an adjustable-width shearer rocker arm according to an embodiment of the present application;

[0031] Figure 2 is a schematic diagram showing the sectional structure mainly reflecting the front sealing cavity according to an embodiment of the present application;

[0032] Figure 3 is a schematic diagram showing the sectional structure mainly reflecting the rear sealing cavity according to an embodiment of the present application;

[0033] Figure 4This is a schematic diagram mainly showing the structure of the moving mechanism of the hinge block in the embodiment of the present application;

[0034] Figure 5 This is a partial schematic diagram mainly showing the front view in the embodiment of the present application.

[0035] Reference numerals: 1, rocker housing; 2, front sealing cavity; 3, rear sealing cavity; 4, hinge block; 5, moving mechanism; 6, motor; 7, screw; 8, brake; 21, first bearing; 22, first oil seal; 23, second oil seal; 24, first grease nipple; 25, first sealing ring; 26, sealing cover; 27, first screw; 201, first screw hole; 202, first U-shaped groove; 261, second U-shaped groove; 31, end cover; 32, third oil seal; 33, second sealing ring; 34, second screw; 35, second grease nipple; 36, second bearing; 37, fourth oil seal; 38, third sealing ring; 39, sealing seat; 301, second screw hole; 311, third U-shaped groove; 312, annular groove; 313, round hole; 391, fourth U-shaped groove; 51, outer shell; 52, rotating block; 53, stud; 54, pressing plate; 55, retaining ring; 56, cylindrical pin; 57, third screw; 11, T-shaped track; 41, groove. Detailed implementation manners

[0036] The following further Figures 1 - 5 describes the present application in detail with reference to the attached drawings.

[0037] The embodiment of the present application discloses an adjustable-width shearer rocker arm.

[0038] Referring to Figure 1 , an adjustable-width shearer rocker arm, as Figure 1 shown, on the outer end of one side of the rocker housing 1, a front sealing cavity 2 and a rear sealing cavity 3 are provided. On the outer front end of the front sealing cavity 2, a motor 6 is installed. The motor 6 is connected to the screw 7 to provide a power source for this embodiment. A brake 8 is provided at the other end of the motor 6 to provide a locking device for this embodiment. The front sealing cavity 2 and the rear sealing cavity 3 are used to support the safe and stable rotation of the screw 7 in this embodiment.

[0039] As Figure 1 , Figure 4As shown in the figure, a motion mechanism 5 is provided in the middle of the hinge block 4. The housing 51 of the motion mechanism 5 is installed on the body of the hinge block 4. In the motion mechanism 5, a number of studs 53 are arranged in the middle of the rotating block 52 to form a planetary gear carrier structure. The inner side of the stud 53 meshes with the screw rod 7, and the outer side of the stud 53 meshes with the housing 51 of the motion mechanism 5. The guide rails at both ends of the stud 53 mesh with the tracks of the pressure plate 54. The pressure plate 54 and the housing 51 are integrated by a cylindrical pin 56. When the motor 6 is started, it drives the screw rod 7 to rotate. As the screw rod 7 rotates, the planetary gear carrier formed by the stud 53 and the pressure plate 54 rotates accordingly, and the screw rod 7 and the motion mechanism 5 generate a relative displacement in the axial direction of the screw rod 7, so that a relative displacement is generated between the rocker arm housing 1 and the hinge block 4, achieving the function of adjusting the width of the rocker arm.

[0040] As Figure 2 , Figure 3 shown, in order to make the present embodiment operate safely and stably, both ends of the screw rod 7 are supported by the first bearing 21 in the front seal cavity 2 and the second bearing 36 in the rear seal cavity 3; the front seal cavity 2 is a set of sealing and lubricating system. There is a second oil seal 23 inside the seal cover 26 and a first sealing ring 25 outside. A first oil seal 22 is installed on the front end housing of the front seal cavity 2 to form a seal cavity. There is a first oil injection nozzle 24 and a first screw hole 201 on one side housing of the front seal cavity 2. Lubricating oil is injected from the first oil injection nozzle 24 into the first screw hole 201. The first screw 27 screwed in the first screw hole 201 allows the lubricating oil to enter the seal cavity through the first screw hole 201, thereby lubricating the first bearing 21; the rear seal cavity 3 is a set of sealing and lubricating system. There is a third oil seal 32 inside the end cover 31 and a second sealing ring 33 outside. There is a fourth oil seal 37 inside the seal seat 39 and a third sealing ring 38 outside to form a seal cavity. There is a second oil injection nozzle 35 and a second screw hole 301 on one side housing of the rear seal cavity 3. Lubricating oil is injected from the second oil injection nozzle 35 into the second screw hole 301. The lubricating oil passes through the annular groove 312 and enters the seal cavity from the round hole 313, thereby lubricating the second bearing 36.

[0041] As Figure 5 , Figure 1As shown in the figure, the T-shaped track 11 of the rocker arm housing 1 slides within the groove 41 on the hinge block 4 to assist in supporting the rocker arm housing 1. When adjusting the width of the rocker arm, first release the pressure of the brake 8, and then start the motor 6. As the relative displacement between the rocker arm housing 1 and the hinge block 4 changes, when the relative displacement reaches the required rocker arm width requirement, turn off the motor 6. Subsequently, lock the rocker arm housing 1 through the brake 8. A first screw hole 201 is provided on the side of the front sealing cavity 2 of the rocker arm housing 1. A second screw 34 is provided on the end cover 31 and is installed on the rocker arm housing 1 through the second screw 34. A retaining ring 55 is provided on the outer side of the rotating block 52. A plurality of third screws 57 are provided on the outer housing 51 and are installed on the hinge block 4 through several third screws 57. There are two upper and two lower T-shaped tracks 11 on the rocker arm housing 1, and two upper and two lower grooves 41 on the hinge block 4. There are two second U-shaped grooves 261 in the middle of the sealing cover 26, and two third U-shaped grooves 311 in the middle of the end cover 31. An annular groove 312 is provided at one end of the end cover 31, and two round holes 313 are opened in the annular groove 312. Two fourth U-shaped grooves 391 are provided in the middle of the sealing seat 39. One end of the outer housing 51 close to the front sealing cavity 2 is square with a flange step, and the middle part is cylindrical, which is convenient for installation and use. The axial direction of the cylindrical pin 56 is parallel to the axial direction of the screw rod 7. At one end of the rocker arm housing 1 close to the hinge block 4, there are two upper and two lower T-shaped tracks 11, and at one end of the hinge block 4 close to the rocker arm housing 1, there are two upper and two lower grooves 41. Two first U-shaped grooves 202 are provided at the position of the front sealing cavity 2 close to the first oil seal 22. By providing the first U-shaped grooves 202, the auxiliary use function can be achieved.

[0042] The implementation principle of an adjustable-width shearer rocker arm in an embodiment of this application is as follows: During use, by starting the motor 6, the output end of the motor 6 will drive the screw rod 7 to rotate. As the screw rod 7 rotates, the planetary gear set formed by the stud 53 and the pressure plate 54 will also rotate. Through the relative displacement between the screw rod 7 and the moving mechanism 5 in the axial direction of the screw rod 7, a relative displacement is generated between the rocker arm housing 1 and the hinge block 4, achieving the function of adjusting the rocker arm width. Then, by turning off the motor 6 and subsequently locking the rocker arm housing 1 and the hinge block 4 through the brake 8, the limit fixation is completed, and the overall width of the rocker arm can be adjusted more quickly and flexibly. It can adapt to different matching relationships without replacing the rocker arm, and can also flexibly provide a better inclined cutting and coal cutting space for the shearer, reducing damage to the shearer body from the coal wall, rock, etc.

[0043] The above are all preferred embodiments of this application. The protection scope of this application is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. An adjustable-width shearer boom, characterized in that: It includes a rocker arm housing (1), a hinge block (4), and a screw rod (7); the rocker arm housing (1) includes a front sealing cavity (2) and a rear sealing cavity (3); in the front sealing cavity (2), a first bearing (21), a first oil seal (22), a second oil seal (23), a first oil injection nozzle (24), and a second oil injection nozzle (35) are respectively arranged, and the first bearing (21), the first oil seal (22), and the first oil injection nozzle (24) are respectively arranged at corresponding positions on the rocker arm housing (1). A sealing cover (26) is arranged in the front sealing cavity (2), a first sealing ring (25) is arranged in the sealing cover (26), and the second oil seal (23) is arranged on the sealing cover (26). A first screw (27) is arranged on the sealing cover (26) and is installed on the rocker arm housing (1) through the first screw (27). A motor (6) is arranged outside the front sealing cavity (2), the motor (6) is arranged on the rocker arm housing (1), a screw rod (7) is fixedly installed at the output end of the motor (6), a brake (8) is arranged at the other end of the motor (6), the brake (8) is connected to the rotor of the motor (6), and a first screw hole (201) is opened on the side of the front sealing cavity (2). An end cover (31) is arranged in the rear sealing cavity (3), a third oil seal (32) and a second sealing ring (33) are arranged on the end cover (31), a second screw (34) is arranged on the end cover (31) and is installed on the rocker arm housing (1) through the second screw (34). A second bearing (36) and a sealing seat (39) are arranged on the rear sealing cavity (3), a fourth oil seal (37) and a third sealing ring (38) are arranged on the sealing seat (39), and a second screw hole (301) is opened on the side of the rear sealing cavity (3). A motion mechanism (5) is arranged on the hinge block (4), the motion mechanism (5) includes a housing (51), a rotating block (52), a stud (53), a pressing plate (54), a retaining ring (55), and a cylindrical pin (56). A number of studs (53) are installed between the pressing plates (54). The two pressing plates (54) are installed on both sides of the housing (51) by the cylindrical pin (56), and a number of tooth-shaped track grooves are arranged on the inner wall of the pressing plate (54). The two ends of the stud (53) are connected to the rotating block (52), a number of tooth-shaped guide rails are arranged at both ends of the stud (53), and a retaining ring (55) is arranged outside the rotating block (52). A number of third screws (57) are arranged on the housing (51) and are installed on the hinge block (4) through the number of third screws (57). Two upper and lower T-shaped tracks (11) are arranged on the rocker arm housing (1), and two upper and lower grooves (41) are arranged on the hinge block (4).

2. An adjustable-width shearer rocker arm according to claim 1, characterized in that: There are two second U-shaped grooves (261) in the middle of the sealing cover (26).

3. The adjustable-width shearer rocker arm according to claim 1, characterized in that: There are two third U-shaped grooves (311) in the middle of the end cover (31), an annular groove (312) is arranged at one end of the end cover (31), and two circular holes (313) are opened in the annular groove (312).

4. An adjustable-width shearer rocker arm according to claim 1, characterized in that: There are two fourth U-shaped grooves (391) arranged in the middle of the sealing seat (39).

5. An adjustable-width shearer rocker arm according to claim 1, characterized in that: The end of the housing (51) near the front sealing chamber (2) is square with a flange step, and the middle part is cylindrical.

6. The adjustable-width shearer rocker arm according to claim 1, wherein: The axial direction of the cylindrical pin (56) is parallel to the axial direction of the screw rod (7).

7. An adjustable-width shearer rocker arm according to claim 1, characterized in that: At one end of the rocker arm housing (1) near the hinge block (4), there are two sections of T-shaped tracks (11) on the upper and lower sides respectively.

8. An adjustable-width shearer rocker arm according to claim 1, characterized in that: At one end of the hinge block (4) near the rocker arm housing (1), there are two sections of grooves (41) on the upper and lower sides respectively.

9. An adjustable-width shearer rocker arm according to claim 1, characterized in that: Two first U-shaped grooves (202) are provided at the position of the front sealing chamber (2) near the first oil seal (22).

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