Shearer rocker arm housing and method of forming same, and shearer rocker arm final stage planetary gear mounting structure

Abstract

The present application relates to a coal cutter rocker arm shell and its forming method and a coal cutter rocker arm final stage planetary mechanism mounting structure, the end connecting structure of the shell comprises an end face mounting groove, for different specifications of final stage planetary mechanism, the end face mounting groove has at least two kinds of double side annular groove and single side annular groove with only inside groove wall, bolt holes are arranged on the groove bottom surface at intervals, a radially inward extending nut socket is arranged on the outer cylindrical surface of the end connecting structure at intervals in the circumferential direction, and each bolt hole is through with a nut socket; the forming method is to use the same kind of mold to cast a casting, and the corresponding parts of the casting envelope multiple end connecting structures; the mounting structure comprises a final stage planetary mechanism and a rocker arm shell, and one end of the inner gear ring of the final stage planetary mechanism is positioned and installed on the rocker arm shell with the end face mounting groove as the stop opening. The present application can reduce the work-in-process of the rocker arm shell and the types of process tooling to some extent, and reduce the workload of production and process management.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of coal winning machine rocker arm housing end connection structure, the forming method of this connection structure and the installation structure of the last stage planetary mechanism of coal winning machine rocker arm using the connection structure, belong to coal winning machine technical field. BACKGROUND

[0002] When designing coal winning machine rocker arm, the situation of the same type of rocker arm housing needs to install different diameter last stage planetary mechanism is often encountered, because the structure size of different diameter last stage planetary mechanism is different, the structure of coal winning machine rocker arm housing is also different accordingly, and it is difficult to realize interchange.If still according to conventional idea design and application, each structure of rocker arm housing is designed, produced and managed as an independent product, it will lead to the variety of work-in-process of rocker arm related parts, the quantity is huge, the utilization rate of parts is low, occupies inventory, and the production process, tooling type to be controlled is complex. SUMMARY

[0003] The present application aims to provide a kind of coal winning machine rocker arm housing and its forming method and the installation structure of the last stage planetary mechanism of coal winning machine rocker arm, can reduce the work-in-process of rocker arm housing, the variety of process tooling to some extent, reduce the workload of production and process management.

[0004] The main technical scheme of the present application is as follows:

[0005] A kind of coal winning machine rocker arm housing, it is equipped with end connection structure for installing last stage planetary mechanism, the end connection structure includes bearing seat hole and end face installation slot, for different specifications of last stage planetary mechanism, the end connection structure at least has two kinds: the end face installation slot of structure type a) is double-sided annular groove, the end face installation slot of structure type b) is single-sided annular groove with only inner slot wall, end face installation slot is coaxial with bearing seat hole, the end face installation slot of a) is compared with the end face installation slot of b) more close to the interior in radial direction, no matter which end connection structure, the bottom surface of annular groove is equipped with several bolt holes at intervals, the outer cylindrical surface of end connection structure is equipped with several radial nut pockets extending inward along the circumference at intervals, each bolt hole is through with a nut pocket.

[0006] The top surface of the nut pocket is provided with a counterbore, which is coaxial with the bolt hole.

[0007] The upper edge of the nut pocket is set to be a trumpet mouth shape.

[0008] The inner slot wall of the end face installation slot is also provided with an annular sealing groove, and a sealing ring is installed in the sealing groove.

[0009] Every adjacent two bolt holes are through with the same nut pocket.

[0010] a) The bolt hole on the end connecting structure is radially closer to the inside than b) the bolt hole on the end connecting structure.

[0011] A method for forming a shearer arm housing, which is provided with an end connecting structure, comprises the following steps: a same type of mold is used to cast a casting, and the structure size of the part corresponding to the end connecting structure of the casting should at least envelop the two types of end connecting structures a) and b); and the end connecting structure a) or b) is machined according to the specific part design when the casting is subsequently machined.

[0012] A shearer arm housing, which is provided with an end connecting structure, comprises a shearer arm housing and a shearer arm final stage planetary mechanism, one end of the inner gear ring of the shearer arm final stage planetary mechanism is positioned and installed on the shearer arm housing by using the bottom and the inner side wall of the end face installation groove as the front outer stop, and is fixed by a bolt and a nut, the bolt passes through the bolt hole on the shearer arm housing and the corresponding bolt hole on the inner gear ring, the nut is put into the nut socket and is screwed on the corresponding bolt, and a rear support bearing is installed between the bearing seat hole of the shearer arm housing and the rear shaft neck of the planet carrier of the shearer arm final stage planetary mechanism.

[0013] The present application has the following advantages:

[0014] The shearer arm housing is a series product with multiple possible end connecting structures, and the multiple end connecting structures can be respectively adapted to the installation of the shearer arm final stage planetary mechanism with different diameters.

[0015] The nut socket can uniformly cope with the setting requirement of the bolt hole with different distribution circle diameters, and further meet the installation requirement of the shearer arm final stage planetary mechanism with different diameters.

[0016] When the shearer arm housing is manufactured, a same type of mold is used to cast a casting, and the structure size of the part corresponding to the end connecting structure of the casting should at least envelop the two types of end connecting structures a) and b); and the end connecting structure a) or b) is machined according to the specific part design when the casting is subsequently machined. This method can fully utilize the capacity of the same type of mold, and can effectively reduce the number of casting mold specifications and reduce resource waste.

[0017] The bearing seat hole and the peripheral structure thereof are part of the end connecting structure, and can be designed and processed according to the corresponding structure size of the shearer arm final stage planetary mechanism to be installed, and do not involve special design, so that the structure of the shearer arm housing has good compatibility for the individualized design of different planetary mechanism internal parts such as rear support bearings. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 Structural diagram of an embodiment of the end connection structure of the shearer boom housing in

[0019] Figure 2 Structural diagram of an embodiment of the end connection structure of the shearer boom housing in Figure 1

[0020] Structural diagram of another embodiment of the end connection structure of the shearer boom housing in Figure 3

[0021] Structural diagram of another embodiment of the end connection structure of the shearer boom housing in Figure 4 Figure 3 Structural diagram of another embodiment of the end connection structure of the shearer boom housing in

[0022] Figure 5 Partial structural diagram of a casting enveloping both end connection structures a) and b);

[0023] Figure 6 Figure 2 Diagram of nut pocket and bolt hole distribution in

[0024] Figure 7 Diagram of nut pocket and bolt hole distribution in Figure 4

[0025] REFERENCE NUMBERS:

[0026] 1. Boom housing; 10. Casting; 11. Nut pocket; 12. Planetary connection plate; 13. Bolt hole; 14. Bearing seat hole; 15. End face mounting slot;

[0027] 1'. (For small size) Boom housing; 11. Nut pocket; 12'. Planetary connection plate; 13'. Bolt hole; 14'. Bearing seat hole; 15'. End face mounting slot;

[0028] 4. (Regular size) Final planetary mechanism; 42. Inner ring; 43. Rear support bearing; 44. Bolt; 48. Planetary carrier;

[0029] 4'. (Small size) Final planetary mechanism; 42'. Inner ring; 43'. Rear support bearing; 44'. Bolt; 48'. Planetary carrier. DETAILED DESCRIPTION

[0030] As Figures 1-7 ​​​As shown, the present application discloses a coal mining machine rocker arm shell 1 (or 1'), which is provided with a terminal connecting structure for mounting the final planetary mechanism 4. The terminal connecting structure is generally cylindrical at the position, which includes a bearing seat hole 14 (or 14') for mounting the rear support bearing 43 (or 43'), and an end face mounting groove 15 (or 15') for mounting the inner ring 42 (or 42') of the final planetary mechanism. For different specifications (which can be simply divided into conventional size and small size) of the final planetary mechanism, the terminal connecting structure has at least two types, and the difference between the two types is that: the end face mounting groove of structure type a) is a double-sided annular groove (see Figure 3 、 4 ), and the end face mounting groove of structure type b) is a single-sided annular groove with only an inner groove wall and without an outer groove wall (see Figure 1 、 2 ). The end face mounting groove is coaxial with the bearing seat hole. The end face mounting groove of the a) type terminal connecting structure is closer to the inside in the radial direction than the end face mounting groove of the b) type terminal connecting structure. The a) type terminal connecting structure is suitable for small size final planetary mechanism 4', and the b) type terminal connecting structure is suitable for conventional size final planetary mechanism (referred to as final planetary mechanism 4, the same below). Regardless of the above terminal connecting structure, a plurality of bolt holes 13 or bolt holes 13' suitable for small size final planetary mechanism are arranged on the groove bottom surface of the annular groove, for threading bolts 44 or bolts 44' suitable for small size final planetary mechanism to fix the inner ring. A plurality of nut pockets 11 extending radially inward are arranged on the outer cylindrical surface of the terminal connecting structure in the circumferential direction, for mounting and accommodating nuts matched with the bolts, and each bolt hole is through one nut pocket.

[0031] The position, groove width, groove depth, bolt hole diameter, distribution circle diameter of the bolt hole, diameter of the bearing seat hole, etc. of the end face mounting groove of the terminal connecting structure of different structure types can be different. The structures of other parts of the same type of coal mining machine rocker arm shell except the terminal connecting structure are the same. The same type of coal mining machine rocker arm shell is controlled as a series product, and the types and quantities of the work-in-process and process tooling of the rocker arm shell can be greatly reduced.

[0032] The radial depth of the nut pocket can be designed to be deeper, so that the bolt holes of both the a) type terminal connecting structure and the b) type terminal connecting structure can adapt to the nut pocket, that is, the nut pocket can uniformly meet the setting needs of bolt holes of different distribution circle diameters, and further meet the mounting needs of final planetary mechanisms of different diameters. The end face mounting groove is located on the solid structure above the nut pocket, which is used to connect the planetary mechanism, so this part of the solid structure can also be called a planetary connecting plate 12 or 12'.

[0033] The top surface of the nut socket is further provided with a counterbore corresponding to and coaxial with the bolt hole, for mounting a spring washer with the bolt.

[0034] The upper edge of the nut socket can be provided with a flared shape, which can be achieved by chamfering the upper edge.

[0035] Further, the inner side groove wall of the end face mounting groove is further provided with an annular sealing groove, and a sealing ring is mounted in the sealing groove, for realizing the sealing between the rocker arm housing and the inner ring.

[0036] In the embodiment shown in the drawings, the number of nut sockets is half of the number of bolt holes, and each adjacent two bolt holes are through the same nut socket.

[0037] Compared with the bolt hole of the a) end connecting structure, the bolt hole of the b) end connecting structure is also closer to the inside in the radial direction.

[0038] Since the bearing seat hole and its peripheral structure can be designed and processed according to the corresponding structure size of the required final planetary mechanism, for example, the bearing seat hole diameters of the two structure types of end connecting structures in the embodiment shown in the drawings are different, and a groove for accommodating part of the planet carrier is further provided in front of the bearing seat hole, therefore, the structure of the coal mining machine rocker arm housing has good compatibility for the individualized design of different internal parts of the rear support bearing and other planetary mechanisms.

[0039] For the above-mentioned coal mining machine rocker arm housing, the application further discloses a coal mining machine rocker arm housing forming method: first, a casting 10 is obtained by casting using the same size mold, the structure size of the part corresponding to the end connecting structure should be enveloped a) and b) two end connecting structures, as Figure 5 shown, and the end connecting structure a) or b) is machined according to the specific part design when the casting is subsequently machined. This method can fully utilize the capacity of the same size mold. Casting is performed using the same rocker arm housing casting mold, and different machining is performed to form different rocker arm housings, which can adapt to the installation of different diameter final planetary mechanisms, and can effectively reduce the number of casting mold specifications and reduce resource waste.

[0040] The application also discloses a coal mining machine rocker arm last-stage planetary mechanism mounting structure, which comprises a coal mining machine rocker arm last-stage planetary mechanism 4 (or 4') and the coal mining machine rocker arm shell 1 (or 1'), one end of an inner ring gear 42 (or 42') of the coal mining machine rocker arm last-stage planetary mechanism is positioned and installed on the coal mining machine rocker arm shell as a front outer stop through a groove bottom and an inner side groove wall of an end face installation groove, and is fixed through a bolt 44 (or 44') and a corresponding nut. The bolt passes through the bolt hole on the coal mining machine rocker arm shell and the corresponding bolt hole on the inner ring gear, and the nut is put into the nut nest and screwed on the corresponding bolt. A rear support bearing 43 (or 43') is installed between the bearing seat hole of the coal mining machine rocker arm shell and the rear shaft neck of a planet carrier 48 (or 48') of the coal mining machine rocker arm last-stage planetary mechanism, and is used for supporting the rotation of the planet carrier.

[0041] For the coal mining machine rocker arm shell provided with the counterbore, a spring washer is installed in the counterbore.

Claims

1. A method of forming a shearer boom housing, characterised by: The coal mining machine rocker arm housing is a series product, which is provided with a terminal connecting structure for mounting a final stage planetary mechanism. The terminal connecting structure comprises a bearing seat hole and an end face mounting groove. For different specifications of the final stage planetary mechanism, the terminal connecting structure has two types: the end face mounting groove of the structure type a) is a double-side annular groove, and the end face mounting groove of the structure type b) is a single-side annular groove with only an inner groove wall. The end face mounting groove is coaxial with the bearing seat hole. The end face mounting groove of the structure type a) is closer to the inside in the radial direction than the end face mounting groove of the structure type b). The structures of other parts of the rocker arm housing except the terminal connecting structure are the same. Regardless of which terminal connecting structure is used, a plurality of bolt holes are arranged on the bottom surface of the annular groove of the terminal connecting structure at intervals. A plurality of nut pockets extending radially inward are arranged on the outer cylindrical surface of the terminal connecting structure at intervals in the circumferential direction. Each bolt hole is in communication with a nut pocket. An annular sealing groove is arranged on the inner groove wall of the end face mounting groove. A sealing ring is arranged in the sealing groove.

2. The method of claim 1, wherein: A counterbore is arranged on the top surface of the nut pocket. The counterbore is coaxial with the bolt hole.

3. The method of claim 2, wherein: The upper edge of the nut pocket is in the shape of a trumpet mouth.

4. The method of claim 3, wherein: Every two adjacent bolt holes are in communication with the same nut pocket.

5. A method of forming a shearer boom housing as claimed in claim 1, 2, 3 or 4 wherein: The bolt holes on the terminal connecting structure of the structure type a) are closer to the inside in the radial direction than the bolt holes on the terminal connecting structure of the structure type b).

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