CN216589786U - A cutting reducer for a horizontal axis excavator - Google Patents

Abstract

The utility model discloses a cutting reducer of a cross shaft excavating machine, which is mainly used for a cutting part for rapidly tunneling underground and strip mines and recovering corner coal; the cutting speed reducer is in a cross shaft split type and is formed by connecting two symmetrically arranged single speed reducers through a left connecting flange and a right connecting flange, the tooth forms of a small bevel gear and a large bevel gear of each single speed reducer are in a straight tooth type, a side roller of each cutting speed reducer transmits torque through a square block of an output connecting seat, a floating seal is in a combined seal structure type, and a floating seal seat is in a detachable structure; the utility model can independently replace the damaged single-side part, thereby reducing the maintenance difficulty and the maintenance cost, reducing the assembly and disassembly difficulty of the side roller, and improving the service life of the floating seal and the replacement efficiency of the floating seal seat.

Description

A cutting reducer for a horizontal axis excavator

technical field

The utility model relates to coal mining equipment, in particular to a cutting speed reducer of a horizontal axis mining machine.

Background technique

At present, the problem of unbalanced coal mining in my country is more prominent. In recent years, in order to rapidly increase the footage speed, equipment such as horizontal-axis excavators have been vigorously developed due to the fast footage speed. However, the cutting reducer of the excavator, as its most critical core component, still has the problems of high failure rate, high unit price, high maintenance and replacement cost, and its structural defects are as follows:

1. The cutting reducer of the traditional horizontal-axis excavator is an integral structure. The symmetrical rotation of the double motors is input to the input shaft ends on both sides of the cutting reducer. After three-stage deceleration, the three-stage drum cutting operation is driven, and the After the cutting reducer is damaged, the entire reducer needs to be replaced. The size of the entire cutting reducer is large, the storage and maintenance costs are high, and the replacement is extremely inconvenient;

2. It is difficult to assemble and disassemble the traditional side roller: the inner cylinder of the traditional side roller and the outer cylinder of the outer connecting cylinder are used as a matching method for positioning, and the side roller transmits torque through four sets of flat keys arranged on the outer connecting cylinder. It is very difficult to assemble and disassemble the side drum. After a period of use, due to water mist erosion in cutting, it often happens that it is difficult or even impossible to disassemble;

3. The floating seal life of the cutting reducer of the traditional horizontal axis excavator is low, and the oil leakage damage of the floating seal often occurs;

4. When the floating seal is damaged, the floating seal seat is often damaged, resulting in the need to replace the floating seal seat. Because the seal seat is the main component, the entire reducer needs to be disassembled for replacement and maintenance, and the maintenance cost is high and replacement is difficult.

To sum up, it is necessary to provide a cutting reducer for a horizontal axis excavator with stable structure, convenient maintenance and replacement, and low maintenance cost.

Utility model content

The purpose of the utility model is to provide a cutting speed reducer of a horizontal axis excavator, so that after the damage of one side part can be replaced independently, the maintenance difficulty and maintenance cost are reduced, the difficulty of assembling and disassembling the side drum is reduced, and the service life of the floating seal is improved. And floating seal seat replacement efficiency.

In order to achieve the above purpose, the utility model provides a cutting reducer of a horizontal axis excavator, the cutting reducer is a horizontal axis split type, and is composed of two symmetrically arranged single reducers 18 through the left and right connection method. The flanges 20 are connected to form; the two single reducer 18 are symmetrically installed on the left and right sides of the cutting arm frame 24, and the single reducer 18 is provided with an input shaft 2 on the side of the installation surface for connecting the cutting Motor; the unitary reducer 18 includes a unitary reducer housing 8, the unitary reducer housing 8 is provided with a three-stage deceleration structure and a main shaft 17, and the unitary reducer 18 is decelerated by an internal three-stage The structure transmits the input torque of the cutting motor on the input shaft 2 to the main shaft 17; the inner end of the main shaft 17 is provided with an intermediate coupling seat 16, and the left and right connecting flanges are connected between the intermediate coupling seats 16 of the two single reducers 18. 20 is connected, and the middle drum 21 is driven to rotate through the second flat key 19 to perform cutting operations; the outer side of the main shaft 17 extends to the outside of the single reducer housing 8, and the outer side of the main shaft 17 is connected with the output through the inner and outer splines. The connection seat 9, the output connection seat 9 is fixedly connected with an outer connection cylinder 10, the outer connection cylinder 10 rotates under the transmission of the main shaft 17, the end of the output connection seat 9 is provided with a square block, the output connection The square block of the seat 9 cooperates with the square hole of the side drum 22 for torque transmission, thereby driving the side drum 22 and the middle drum 21 to rotate together to perform the cutting operation.

Further, the three-stage deceleration structure includes a first-stage parallel tooth 3, a second-stage parallel tooth 4, a small bevel gear 6 and a large bevel gear 7; the cutting motor inputs torque through the input shaft 2, and passes through the first-stage parallel tooth 3. It meshes with the second-level parallel teeth 4 to form a first-level deceleration. The internal splines of the second-level parallel teeth 4 drive the small bevel gear 6, and the small bevel gear 6 meshes with the large bevel gear 7 to form a second-level deceleration. The bevel gear 7 is transmitted to the main shaft 17 by the internal spline through the planetary deceleration to form a three-stage deceleration.

Further, the tooth profiles of the small bevel gears 6 and the large bevel gears 7 are both straight teeth.

Further, two rows of mounting holes are provided on the mounting surface of the single reducer 18, and the two rows of mounting holes are symmetrically arranged up and down with respect to the center line of the input shaft 2; the mounting surface of the single reducer 18 is also provided with There is an input end cover 1 and a first flat key 5 , and the single reducer 18 is individually positioned and connected to the cutting arm frame 24 through the input end cover 1 and the first flat key 5 .

Further, the tolerance of the outer cylinder of the outer connecting cylinder 10 and the inner cylinder of the side drum 22 is a clearance fit.

Further, a bearing seat 15 is fixed on the single reducer housing 8 , a bearing 23 is mounted on the bearing seat 15 , and the outer connecting cylinder 10 is supported on the bearing seat 15 through the bearing 23 .

Further, a sealing assembly is provided between the outer connecting cylinder 10 and the bearing seat 15, and the sealing assembly includes a dynamic sealing seat 11 installed on the outer connecting cylinder 10, a static sealing seat 14 installed on the bearing seat 15, a floating seal The seal 12 and the labyrinth seal provided on the outside of the floating seal 12 are combined with the outer seal 13.

The utility model has the following beneficial effects:

1. The cutting speed reducer of a horizontal axis excavator provided by the present utility model is composed of two single speed reducers, which can realize the complete exchange of left and right. This single speed reducer is easy to maintain and replace, and greatly reduces the reserve cost. ;

2. In the utility model, the single reducer is connected to the side drum, and the torque is output to the side drum through the square block of the output connection seat. The tolerance between the inner cylinder of the side drum and the outer cylinder of the outer connecting cylinder is the gap. The matching method solves the problem of difficult disassembly and assembly of the side drum;

3. In the utility model, the outer side of the floating seal of the single reducer is provided with a combined seal type of labyrinth seal and external seal, which effectively solves the problem that the floating seal is frequently damaged;

4. The dynamic and static side sealing seats of the floating seal of the single reducer in the utility model are detachable dynamic sealing seats and static sealing seats, which are convenient for replacement and low in maintenance cost.

Description of drawings

1 is a schematic structural diagram of a specific embodiment of a cutting reducer of a horizontal-axis excavator provided by the utility model;

Fig. 2 is a sectional view of the unit reducer in Fig. 1;

FIG. 3 is a side view of the unitary reducer in FIG. 1;

FIG. 4 is a schematic view of the installation surface of the unit reducer in FIG. 1;

Fig. 5 is the enlarged view of K place in Fig. 2;

In the figure: 1. Input end cover; 2. Input shaft; 3. First-level parallel teeth; 4. Second-level parallel teeth; 5. First flat key; 6. Small bevel gear; 7. Large bevel gear; 8. Single Body reducer housing; 9. Output connection seat; 10. External connection cylinder; 11. Dynamic seal seat; 12. Floating seal; 13. External seal; 14. Static seal seat; 15. Bearing seat; 16. Intermediate coupling seat ; 17, the main shaft; 18, the single reducer; 19, the second flat key; 20, the left and right connecting flanges; 21, the middle drum; 22, the side drum; 23, the bearing; 24, the cutting arm.

Detailed ways

The present utility model will be described in detail below with reference to the accompanying drawings and embodiments.

As shown in Figures 1 to 3, a cutting reducer of a horizontal-axis excavator is a horizontal-axis split type, consisting of two symmetrically arranged single reducers 18 connected by left and right connecting flanges 20; two The single reducer 18 is symmetrically installed on the left and right sides of the cutting arm frame 24 respectively. The single reducer 18 is provided with an input shaft 2 on the side of the installation surface for connecting the cutting motor; the single reducer 18 includes a single reducer A three-stage deceleration structure and a main shaft 17 are arranged inside the unitary reducer casing 8. The single-stage decelerator 18 transmits the input torque of the cutting motor on the input shaft 2 to the main shaft 17 through the internal three-stage deceleration structure. The inner end of the main shaft 17 is provided with an intermediate coupling seat 16, the intermediate coupling seat 16 of the two single reducer 18 is connected by the left and right connecting flanges 20, and the second flat key 19 drives the intermediate drum 21 to rotate for cutting operations. The outer side of the main shaft 17 protrudes to the outside of the single reducer housing 8, the outer side of the main shaft 17 is connected with the output connection seat 9 through the inner and outer splines, and the output connection seat 9 is fixedly connected with the outer connection cylinder 10, and the outer connection cylinder 10 is in the main shaft 17. It rotates under the transmission of the radiator, the end of the output connection seat 9 is provided with a square block, and the square block of the output connection seat 9 cooperates with the square hole of the side drum 22 for torque transmission, thereby driving the side drum 22 and the middle drum 21 to rotate together for cutting. The main function of the square block of the connecting seat 9 is to transmit the output torque to the side drum 22 to drive the side drum 22 to rotate, and the outer cylinder of the outer connecting cylinder 10 supports the inner cylinder of the side drum 22, so that the side drum 22 can be stably performed. The cutting operation changes the traditional way of connecting with flat keys and solves the problem of difficult assembly and disassembly.

In the embodiment of the present invention, the three-stage deceleration structure includes a first-stage parallel tooth 3, a second-stage parallel tooth 4, a small bevel gear 6 and a large bevel gear 7; the cutting motor inputs torque through the input shaft 2, and passes through a The second-level parallel teeth 3 and the second-level parallel teeth 4 mesh to form a first-level deceleration, the internal splines of the second-level parallel teeth 4 drive the small bevel gear 6, and the small bevel gear 6 meshes with the large bevel gear 7 to form a second-level deceleration. 7 The internal spline is transmitted to the main shaft 17 through planetary deceleration to form three-stage deceleration.

In the embodiment of the present utility model, the tooth profile of the small bevel gear 6 and the large bevel gear 7 adopts the straight tooth type, which can meet the requirements of forward rotation and reverse rotation, and ensure that both forward and reverse rotation can meet the requirements of the gears. strength requirements, so that the two single reducer 18 can be interchanged left and right.

In the embodiment of the present invention, two rows of mounting holes are provided on the mounting surface of the single reducer 18, and the two rows of mounting holes are symmetrically arranged up and down relative to the center line of the input shaft 2; An input end cover 1 and a first flat key 5 are also provided, and the single reducer 18 is individually positioned and connected to the cutting arm frame 24 through the input end cover 1 and the first flat key 5 , as shown in FIG. 4 .

In the embodiment of the present invention, the tolerance of the outer cylinder of the outer connecting cylinder 10 and the inner cylinder of the side drum 22 is a clearance fit, the output structure is stable, the disassembly is very convenient, and the problem of difficult disassembly and assembly of the side drum is solved.

In the embodiment of the present invention, a bearing seat 15 is fixed on the single reducer housing 8 , a bearing 23 is installed on the bearing seat 15 , and the outer connecting cylinder 10 is supported on the bearing seat 15 through the bearing 23 .

In the embodiment of the present invention, a sealing assembly is provided between the outer connecting cylinder 10 and the bearing seat 15 , and the sealing assembly includes a dynamic sealing seat 11 installed on the outer connecting cylinder 10 and a static sealing The seat 14, the floating seal 12 and the combination seal of the labyrinth seal located on the outside of the floating seal 12 and the outer seal 13 are combined as shown in Figure 5; a dust-proof combined seal is added outside the floating seal 12 to prevent coal slime from entering The area of the floating seal 12 effectively increases the service life of the floating seal 12; the detachable dynamic seal seat 11 and the static seal seat 14 are adopted, which is convenient for replacement and low in maintenance cost.

The above-mentioned embodiments are only to illustrate the technical concept and characteristics of the present invention, and the purpose thereof is to enable those who are familiar with the technology to understand the content of the present invention and implement accordingly, and cannot limit the protection scope of the present invention with this. All equivalent changes or modifications made according to the spirit of the present invention shall be included within the protection scope of the present invention.

Claims (7)

1. A cutting reducer for a horizontal-axis excavator, characterized in that the cutting reducer is a horizontal-axis split type, and is composed of two symmetrically arranged single reducers (18) through the left and right connecting flanges (20) Connection structure; the two single reducers (18) are symmetrically installed on the left and right sides of the cutting boom (24), respectively, and the single reducer (18) is provided with an input shaft on the side of the installation surface (2), for connecting the cutting motor; the unitary reducer (18) includes a unitary reducer casing (8), and the unitary reducer casing (8) is provided with a three-stage deceleration structure and A main shaft (17), the unitary reducer (18) transmits the input torque of the cutting motor on the input shaft (2) to the main shaft (17) through an internal three-stage deceleration structure; the inner end of the main shaft (17) is installed There is an intermediate coupling seat (16), the intermediate coupling seats (16) of the two single reducers (18) are connected by the left and right connecting flanges (20), and the intermediate roller (21) is driven by the second flat key (19). ) rotation to perform cutting operation; the outer side of the main shaft (17) protrudes to the outside of the single reducer housing (8), and the outer side of the main shaft (17) is connected with an output connection seat (9) through internal and external splines, so The output connection seat (9) is fixedly connected with an outer connection cylinder (10), the outer connection cylinder (10) is rotated under the transmission of the main shaft (17), and the end of the output connection seat (9) is provided with a square block , the square block of the output connection seat (9) cooperates with the square hole of the side drum (22) to transmit torque, thereby driving the side drum (22) and the middle drum (21) to rotate together for cutting operation. 2. A cutting reducer for a horizontal axis excavator according to claim 1, wherein the three-stage deceleration structure comprises a first-level parallel tooth (3), a second-level parallel tooth (4), a small A bevel gear (6) and a large bevel gear (7); the cutting motor inputs torque through the input shaft (2), and meshes with the first-level parallel teeth (3) and the second-level parallel teeth (4) to form a first-level deceleration, The inner spline of the secondary parallel teeth (4) drives the small bevel gear (6), the small bevel gear (6) meshes with the large bevel gear (7) to form a secondary deceleration, and the large bevel gear (7) The internal spline is transmitted to the main shaft (17) through planetary deceleration to form three-stage deceleration. 3. A cutting reducer for a horizontal axis excavator according to claim 2, characterized in that the tooth profiles of the small bevel gear (6) and the large bevel gear (7) are both straight tooth types. 4. A cutting reducer for a horizontal axis excavator according to claim 1, characterized in that, two rows of installation holes are provided on the mounting surface of the single reducer (18), and the two rows of installation holes are The holes are arranged symmetrically up and down with respect to the center line of the input shaft (2); an input end cover (1) and a first flat key (5) are also provided on the mounting surface of the unitary reducer (18), and the unitary reducer (18) is also provided with an input end cover (1) and a first flat key (5). The cutter (18) is individually positioned and connected to the cutting arm frame (24) through the input end cover (1) and the first flat key (5). 5. The cutting reducer of a horizontal axis excavator according to claim 1, wherein the tolerance of the outer cylinder of the outer connecting cylinder (10) and the inner cylinder of the side drum (22) is a clearance fit . 6. A cutting reducer for a horizontal axis excavator according to claim 1, characterized in that a bearing seat (15) is fixed on the single reducer housing (8), and the bearing seat A bearing (23) is mounted on the (15), and the outer connecting cylinder (10) is supported on the bearing seat (15) through the bearing (23). 7. A cutting reducer for a horizontal axis excavator according to claim 6, characterized in that a sealing assembly is provided between the outer connecting cylinder (10) and the bearing seat (15), and the sealing The assembly includes a dynamic seal seat (11) installed on the outer connecting cylinder (10), a static seal seat (14) installed on the bearing seat (15), a floating seal (12) and a labyrinth arranged on the outside of the floating seal (12) The seal is combined with the outer seal (13).

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