Separated shell structure of planetary rotary transmission system for electric shovel

Abstract

The utility model discloses a separation type shell structure of a planetary rotary transmission system for an electric shovel, which relates to the technical field of electric shovels and comprises a motor flange, a gear ring shaft sleeve and a support ring, a support flange is fixedly arranged at the bottom of the side surface of the support ring, and the lower end face of the motor flange is butted with the upper end face of the gear ring shaft sleeve. The lower end face of the gear ring shaft sleeve is in butt joint with the upper end face of the supporting ring, the motor flange, the gear ring shaft sleeve and the supporting ring are the same in axis, a plurality of through bolt holes are formed in the positions, close to the side surfaces, of the motor flange, the gear ring shaft sleeve and the supporting ring in an annular matrix mode, and long bolts penetrate through the bolt holes to connect the motor flange, the gear ring shaft sleeve and the supporting ring. The shell comprises the motor flange, the gear ring shaft sleeve and the supporting ring and is fixed in the axial direction through the long bolts, the motor flange and the gear ring shaft sleeve are limited in the circumferential direction through the radial pins, the gear ring shaft sleeve and the supporting ring are limited in the circumferential direction through the radial pins, installation stability is guaranteed, meanwhile, the motor flange, the gear ring shaft sleeve and the supporting ring can be detached, and machining, installation, maintenance and overhaul are convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of electric shovels, in particular to a split housing structure of a planetary slewing drive system for an electric shovel. Background Technique

[0002] An electric shovel is one of the main excavation equipment in ten-million-ton open-pit mines, with high productivity, high operation rate and low operation cost, and is a recognized model in the mining industry.

[0003] An electric shovel generally adopts a planetary slewing drive system, which generally consists of a motor, a shaft, a housing, a planetary gear set, a slewing platform, etc. In the existing electric shovel slewing drive system, the housing is of an integral structure. As Figure 4 shown, the housing is integrally formed by casting.

[0004] However, due to the large volume and weight of the housing, there are significant disadvantages in production and use: difficult processing, installation, maintenance and repair, and the whole needs to be replaced when one part is damaged, increasing the input cost. Content of the Utility Model

[0005] In view of the above deficiencies of the prior art, the utility model provides a split housing structure of a planetary slewing drive system for an electric shovel. The housing includes a motor flange, a ring gear bushing and a support ring, and is axially fixed by a plurality of long bolts. The motor flange and the ring gear bushing, as well as the ring gear bushing and the support ring, are circumferentially limited by radial pins. While ensuring stable installation, the three can be disassembled, facilitating processing, installation, maintenance and repair. The components can be repaired and replaced separately, reducing the input cost.

[0006] To achieve the above object, the utility model is realized through the following technical solutions: A split housing structure of a planetary slewing drive system for an electric shovel, including a motor flange, a ring gear bushing and a support ring. A support flange is fixedly arranged at the bottom of the side surface of the support ring. The lower end surface of the motor flange is butted against the upper end surface of the ring gear bushing, and the lower end surface of the ring gear bushing is butted against the upper end surface of the support ring. The central axes of the motor flange, the ring gear bushing and the support ring are the same, and a plurality of through bolt holes are annularly arranged at positions close to the side surface. The motor flange, the ring gear bushing and the support ring are connected by long bolts passing through the bolt holes. A plurality of first limiting grooves are radially opened on the lower end surface of the motor flange, a plurality of second limiting grooves are radially opened on the upper end surface and the lower end surface of the ring gear bushing respectively, and a plurality of third limiting grooves are radially opened on the upper end surface of the support ring. The first limiting grooves correspond to the second limiting grooves on the upper end surface of the ring gear bushing one by one to form radial pin holes, and the third limiting grooves correspond to the second limiting grooves on the lower end surface of the ring gear bushing one by one to form radial pin holes. Radial pins are inserted into the radial pin holes with interference fit.

[0007] Preferably, a fixing plate is provided at the outer end of the radial pin. Threaded holes are provided on the side surfaces of the motor flange, the gear ring bushing, and the support ring corresponding to the position of the fixing plate, and the fixing plate is fixed by screwing a screw into the threaded hole.

[0008] Preferably, a plurality of through axial pin holes are provided in a circular matrix near the side surfaces of the motor flange, the gear ring bushing, and the support ring. The positions of the axial pin holes are offset from the positions of the bolt holes, and axial pins are inserted into the axial pin holes with a transition fit.

[0009] Preferably, the first limiting groove, the second limiting groove, and the third limiting groove are integrally formed and cast with the motor flange, the gear ring bushing, and the support ring respectively.

[0010] Preferably, the support ring and the support flange are integrally formed and cast.

[0011] Preferably, the strength of the gear ring bushing is greater than that of the support ring, the strength of the support ring is greater than that of the motor flange, and the strength of the motor flange is greater than that of the support flange.

[0012] The utility model provides a split housing structure for a planetary slewing drive system of an electric shovel, and has the following beneficial effects:

[0013] 1. In the utility model, the housing includes a motor flange, a gear ring bushing, and a support ring and is axially fixed by a plurality of long bolts. The motor flange and the gear ring bushing, as well as between the gear ring bushing and the support ring, are circumferentially limited by radial pins respectively. While ensuring stable installation, the three can be disassembled, which is convenient for processing, installation, maintenance and repair. The components can be repaired and replaced separately, reducing the input cost, avoiding chain damage, improving the structural efficiency, and being applicable to the transmission under high-strength working conditions; in addition, the standardized connection of independent parts can be adjusted and combined as required, improving the system expandability.

[0014] 2. In the utility model, the torque borne by the circumferentially limited radial pin acts on the axial section, while the torque borne by the long bolt acts on the radial section. The length of the radial pin is much greater than its diameter. Therefore, the circumferentially limited radial pin has a stronger torque-bearing capacity, is more solid and stable. The circumferential uniform arrangement can balance the load, improve the anti-slip ability, and ensure the stability of the slewing operation; in addition, the circumferential limiting method of the radial pin can also avoid the influence of the upper and lower end faces of the component on the interfering parts, expanding the application scenario of the pin.

[0015] 3. In the utility model, axial pins are axially inserted into the end faces of the motor flange, the gear ring bushing, and the support ring. The fit between the long bolt and the bolt hole is a clearance fit, and relative slip may occur under the circumferential torque, resulting in poor stability. The transition fit between the axial pin and the axial pin hole is adopted, and in combination with the use of the radial pin, the slip in the circumferential direction is reduced or eliminated, ensuring the stability of the installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is the front view of the whole of the present utility model;

[0017] Figure 2 is the top view of the connection between the gear ring bushing and the support ring in the present utility model;

[0018] Figure 3 is the exploded view of the present utility model;

[0019] Figure 4 is the schematic diagram of the prior art.

[0020] In the figures: 1, motor flange; 2, gear ring bushing; 3, support ring; 4, support flange; 5, radial pin; 6, long bolt; 7, threaded hole; 8, bolt hole; 9, axial pin hole; 11, first limiting groove; 22, second limiting groove; 33, third limiting groove; 51, fixing plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0022] As Figures 1-3As shown in the figure, a split housing structure of a planetary slewing drive system for an electric shovel includes a motor flange 1, a ring gear bushing 2, and a support ring 3. A support flange 4 is fixedly arranged at the bottom of the side surface of the support ring 3. The lower end surface of the motor flange 1 is butt-jointed with the upper end surface of the ring gear bushing 2, and the lower end surface of the ring gear bushing 2 is butt-jointed with the upper end surface of the support ring 3. The axis lines of the motor flange 1, the ring gear bushing 2, and the support ring 3 are the same, and a plurality of through bolt holes 8 are arranged in a circular matrix near the side surface. The motor flange 1, the ring gear bushing 2, and the support ring 3 are connected by long bolts 6 passing through the bolt holes 8. A plurality of first limiting grooves 11 are radially arranged on the lower end surface of the motor flange 1. A plurality of second limiting grooves 22 are respectively radially arranged on the upper end surface and the lower end surface of the ring gear bushing 2. A plurality of third limiting grooves 33 are radially arranged on the upper end surface of the support ring 3. The first limiting grooves 11 correspond to the second limiting grooves 22 on the upper end surface of the ring gear bushing 2 one by one and form radial pin holes. The third limiting grooves 33 correspond to the second limiting grooves 22 on the lower end surface of the ring gear bushing 2 one by one and form radial pin holes. Radial pins 5 are inserted into the radial pin holes with transition fit. One end of the outer side of the radial pin 5 is provided with a fixing plate 51. Threaded holes 7 are arranged on the side surfaces of the motor flange 1, the ring gear bushing 2, and the support ring 3 corresponding to the fixing plate 51. The fixing plate 51 is fixed by screwing a screw into the threaded hole 7. A plurality of through axial pin holes 9 are arranged in a circular matrix near the side surfaces of the motor flange 1, the ring gear bushing 2, and the support ring 3. The positions of the axial pin holes 9 are avoided from the positions of the bolt holes 8. Axial pins are inserted into the axial pin holes with transition fit. The first limiting grooves 11, the second limiting grooves 22, and the third limiting grooves 33 are integrally formed by casting with the motor flange 1, the ring gear bushing 2, and the support ring 3 respectively. The support ring 3 and the support flange 4 are integrally formed by casting. The strength of the ring gear bushing 2 is greater than that of the support ring 3, the strength of the support ring 3 is greater than that of the motor flange 1, and the strength of the motor flange 1 is greater than that of the support flange 4.

[0023] The detailed connection means are well-known techniques in the art. The following mainly introduces the working principle and process, which are as follows:

[0024] According to the attached drawings of the specification Figures 1-3It can be seen that in the present utility model, the housing includes a motor flange 1, a ring gear bushing 2, and a support ring 3, which adopts a split structure. During installation, the lower end surface of the ring gear bushing 2 is docked with the upper end surface of the support ring 3, and the lower end surface of the motor flange 1 is docked with the upper end surface of the ring gear bushing 2. At the same time of docking, the bolt holes 8 of the motor flange 1, the ring gear bushing 2, and the support ring 3 are aligned. The first limiting groove 11 corresponds to the second limiting groove 22 on the upper end surface of the ring gear bushing 2 one by one to form a radial pin hole, and the third limiting groove 33 corresponds to the second limiting groove 22 on the lower end surface of the ring gear bushing 2 one by one to form a radial pin hole. The radial pin holes are not labeled in the figure, but those skilled in the art can see that the motor flange 1, the ring gear bushing 2, and the support ring 3 are connected by a long bolt 6 passing through the bolt hole 8. A radial pin 5 is inserted into the radial pin hole by interference fit to prevent circumferential rotation. The housing of the present utility model includes a motor flange 1, a ring gear bushing 2, and a support ring 3 and is axially fixed by a plurality of long bolts 6, and can be disassembled. The motor flange 1 and the ring gear bushing 2, as well as between the ring gear bushing 2 and the support ring 3, are circumferentially limited by the radial pin 5, ensuring stable installation while the three can be disassembled, facilitating processing, installation, maintenance and repair. The components can be repaired and replaced individually, reducing the input cost. The torque borne by the circumferentially limited radial pin 5 acts on the axial section, while the torque borne by the long bolt 6 acts on the radial section. The length of the radial pin 5 is much greater than its diameter. Therefore, the circumferentially limited radial pin 5 has a stronger torque-bearing capacity, is more robust and stable. The circumferential uniform arrangement can balance the load and improve the anti-slip ability, ensuring the stability of the rotary work. In addition, the circumferential limiting method of the radial pin 5 can also avoid the influence of the upper and lower end faces of the components on the interfering parts, expanding the application scenarios of the pin.

[0025] Wherein, one end of the outer side of the radial pin 5 is provided with a fixing plate 51, and threaded holes 7 are opened on the side surfaces of the motor flange 1, the ring gear bushing 2, and the support ring 3 corresponding to the position of the fixing plate 51. The fixing plate 51 is fixed by screwing a screw into the threaded hole 7. Of course, other relaxation structures, such as a circlip, a retaining ring, etc., can also be used to prevent the radial pin 5 from being thrown out due to centrifugal force during rotation.

[0026] Wherein, a plurality of through axial pin holes 9 are annularly arranged in a matrix near the side surfaces of the motor flange 1, the ring gear bushing 2, and the support ring 3. The positions of the axial pin holes 9 are avoided from the positions of the bolt holes 8. An axial pin is inserted into the axial pin hole 9 by interference fit. The axial pin is not drawn in the figure, and a pin of the prior art can be used. Those skilled in the art can understand that generally, the fit between the long bolt 6 and the bolt hole 8 is a clearance fit, and relative slip may occur under circumferential torque, resulting in poor stability. By using the interference fit between the axial pin and the axial pin hole 9 and in combination with the use of the radial pin 5, the slip in the circumferential direction is reduced or eliminated, ensuring the stability of the installation.

[0027] Among them, the first limiting groove 11, the second limiting groove 22, and the third limiting groove 33 are integrally formed and cast with the motor flange 1, the gear ring bushing 2, and the support ring 3 respectively, without the need for separate post-processing.

[0028] Among them, the support ring 3 and the support flange 4 are integrally formed and cast, or can also be welded to ensure stable fixation between the two.

[0029] Among them, the strength of the gear ring bushing 2 is greater than that of the support ring 3, the strength of the support ring 3 is greater than that of the motor flange 1, and the strength of the motor flange 1 is greater than that of the support flange 4. Since the gear ring bushing 2 and the support ring 3 will bear greater forces than the motor flange 1 and the support flange 4 during operation, therefore, the gear ring bushing 2 and the support ring 3 can also be produced by forging, and the motor flange 1 and the support flange 4 can be produced by casting. Generally, forgings will have greater strength than castings.

[0030] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A split housing structure for a planetary slewing drive system of an electric shovel, characterized in that, The invention comprises a motor flange (1), a gear ring sleeve (2) and a support ring (3), wherein a support flange (4) is fixedly arranged at the bottom of the side surface of the support ring (3), the lower end surface of the motor flange (1) is in contact with the upper end surface of the gear ring sleeve (2), and the lower end surface of the gear ring sleeve (2) is in contact with the upper end surface of the support ring (3), and the motor flange (1), the gear ring sleeve (2) and the support ring (3) have the same axial center line and are provided with a plurality of through bolt holes (8) in a ring matrix near the side surface, and the motor flange (1), the gear ring sleeve (2) and the support ring (3) are fixedly arranged at the bottom of the side surface of the support ring (3), and the motor flange (1), the gear ring sleeve (2) and the support ring (3) are fixedly ... The motor flange (1) is connected with the support ring (3), wherein the lower end surface of the motor flange (1) is radially provided with a plurality of first limiting grooves (11), the upper end surface and the lower end surface of the gear ring sleeve (2) are respectively radially provided with a plurality of second limiting grooves (22), and the upper end surface of the support ring (3) is radially provided with a plurality of third limiting grooves (33), the first limiting grooves (11) correspond one-to-one with the second limiting grooves (22) on the upper end surface of the gear ring sleeve (2) and form radial pin holes, the third limiting grooves (33) correspond one-to-one with the second limiting grooves (22) on the lower end surface of the gear ring sleeve (2) and form radial pin holes, and radial pins (5) are inserted in the radial pin holes in a transition fit.

2. The separable housing structure of a planetary slewing drive system for an electric shovel according to claim 1, wherein, A fixing plate (51) is arranged at one end of the outer side of the radial pin (5); threaded holes (7) are provided on the side surfaces of the motor flange (1), the gear ring sleeve (2) and the support ring (3) at positions corresponding to the fixing plate (51); and the fixing plate (51) is fixed by screwing the threaded holes (7) together.

3. The separable housing structure of the planetary slewing drive system for an electric shovel according to claim 1, characterized in that, A plurality of through axial pin holes (9) are provided in an annular matrix near the side surfaces of the motor flange (1), the gear ring sleeve (2) and the support ring (3); the positions of the axial pin holes (9) are avoided from the positions of the bolt holes (8); and axial pins are inserted into the axial pin holes (9) in a transition fit.

4. A separable housing structure of a planetary slewing drive system for an electric shovel according to claim 1, characterized in that The first limiting groove (11), the second limiting groove (22), and the third limiting groove (33) are respectively integrally cast with the motor flange (1), the gear ring sleeve (2), and the support ring (3).

5. The separable housing structure of a planetary slewing drive system for an electric shovel according to claim 1, characterized in that, The support ring (3) and the support flange (4) are cast in one piece.

6. The separable housing structure of the planetary slewing drive system for an electric shovel according to claim 1, characterized in that, The strength of the gear ring sleeve (2) is greater than the strength of the support ring (3), the strength of the support ring (3) is greater than the strength of the motor flange (1), and the strength of the motor flange (1) is greater than the strength of the support flange (4).

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