Coal mining machine and planet carrier mechanism of coal mining machine

Abstract

The utility model discloses a planet carrier mechanism of a coal mining machine, which comprises a first-stage planet carrier and a second-stage sun gear, one side of the first-stage planet carrier is provided with a planet carrier connecting structure for connecting the second-stage sun gear, and the other side of the first-stage planet carrier is provided with a first-stage sun gear inlet for the first-stage sun gear to pass through; transmission gear teeth are arranged on one side of the second-stage sun gear, and a sun gear connecting structure used for being connected with the planet carrier connecting structure is arranged on the other side of the second-stage sun gear. According to the planet carrier mechanism of the coal mining machine, the first-stage planet carrier and the second-stage sun gear are high in connection strength and stable in connection, the transmission stability and reliability of a planetary reducer of the coal mining machine are improved, the service life of the coal mining machine is prolonged, and the working efficiency of the coal mining machine is improved. In addition, the utility model further discloses the coal mining machine with the planet carrier mechanism of the coal mining machine.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mining machines, in particular to a welded coal mining machine planetary frame mechanism and a coal mining machine. Background Art

[0002] At present, in order to adapt to the actual situation of the coal mine working face, the working environment of the coal mining machine is becoming increasingly complex and severe. It is often necessary to cut coal rock and gangue at the same time, so the load that the coal mining machine planetary reducer needs to bear is gradually increasing. The existing coal mining machine generally adopts a two-stage planetary mechanism to transmit torque, in which the planetary carrier and the sun gear are respectively used as independent parts to participate in the transmission, and the two are connected by splines. Due to the structural limitations of the coal mining machine, in some cases, the size of the coal mining machine planetary reducer is limited, and because the planetary reducer works in harsh conditions and is subjected to complex impact loads, pitting, scratches, and wear will occur on the spline pair tooth surface, causing the tooth surface to fail and thus affecting the transmission, increasing the maintenance cost of the coal mining machine, and reducing the coal mining efficiency. In addition, the planetary carrier and sun gear need to be forged, and the manufacturing cost is high. Summary of the invention

[0003] The purpose of the utility model is to solve the above-mentioned problems and to provide a coal mining machine and a planetary carrier mechanism for the coal mining machine. The connection between the first-level planetary carrier and the second-level sun gear is high in strength and stable in connection, thereby improving the transmission stability and reliability of the planetary reducer of the coal mining machine and improving the service life and working efficiency of the coal mining machine.

[0004] In order to achieve the above-mentioned purpose of the utility model, on the one hand, the utility model provides a planetary carrier mechanism of a coal mining machine, including a primary planetary carrier and a secondary sun gear, wherein: one side of the primary planetary carrier is provided with a planetary carrier connection structure for connecting the secondary sun gear, and the other side is provided with a primary sun gear entrance for the primary sun gear to pass through; one side of the secondary sun gear is provided with transmission gear teeth, and the other side is provided with a sun gear connection structure for connecting the planetary carrier connection structure.

[0005] Preferably, the planet carrier connection structure includes a countersunk hole arranged at the center of one side of the primary planet carrier for connecting to the sun gear connection structure.

[0006] Preferably, the planet carrier connection structure further comprises a groove arranged on the opening side of the countersunk hole of the first-stage planet carrier for facilitating welding of the second-stage sun gear to the first-stage planet carrier.

[0007] Preferably, the planet carrier connection structure further comprises a positioning circular hole provided on the primary planet carrier, which is connected to the counterbore and located on the side of the counterbore away from the groove and is used to position the secondary sun gear.

[0008] Preferably, the sun gear connection structure includes a positioning round platform provided at the other end of the secondary sun gear for fitting the positioning round hole of the primary planet carrier.

[0009] Preferably, the sun gear connection structure further includes a matching structure provided on the secondary sun gear and close to the positioning round platform for matching the counterbore of the primary planet carrier.

[0010] Preferably, the cross-section of the counterbore includes, but is not limited to, a circle, a polygon, or a rounded polygon.

[0011] Preferably, the outer contour of the matching structure includes, but is not limited to, a circle, a polygon, or a rounded polygon.

[0012] In addition, the present utility model further provides a shearer, which includes the shearer planet carrier mechanism as described above.

[0013] Compared with the prior art, the shearer and the shearer planet carrier mechanism of the present utility model have the following advantages:

[0014] For the shearer planet carrier mechanism of the present utility model, a welding method is used to form an integral structure of the primary planet carrier and the secondary sun gear, so that the overall dimensions of the primary planet carrier and the secondary sun gear are reduced, the overall space required for the planetary mechanism is correspondingly reduced, the structure is more compact, and the welded planet carrier can not only avoid tooth surface failures such as pitting and wear of the spline teeth caused by spline pair connection, but also reduce the machining difficulty of the secondary sun gear, making the sun gear have high strength and high hardness, and the manufacturing cost is also lower than that of overall full forging. Therefore, while ensuring reliability and stability, the manufacturing economy is improved, and the service life and working efficiency of the shearer are correspondingly increased.

[0015] The present utility model will be described in detail below with reference to the accompanying drawings. Description of the Drawings

[0016] Figure 1 is a perspective view of the shearer planet carrier mechanism of the present utility model;

[0017] Figure 2 is a sectional view of the secondary sun gear of the present utility model;

[0018] Figure 3 is a sectional view of the shearer planet carrier mechanism of the present utility model;

[0019] Figure 4 is a sectional view of the primary planet carrier of the present utility model. Detailed Embodiments

[0020] As Figure 1 、 Figure 3As shown, they are schematic diagrams of different structures of the planetary carrier mechanism of the coal mining machine of the present invention. It can be seen from the figure that the planetary carrier mechanism of the coal mining machine of the present invention includes a primary planetary carrier and a secondary sun gear, wherein: a planetary carrier connecting structure for connecting the secondary sun gear is arranged on one side of the primary planetary carrier, and a primary sun gear entrance for the primary sun gear of the coal mining machine planetary reducer to pass through is arranged on the other side; transmission gear teeth are arranged on one side of the secondary sun gear, and a sun gear connecting structure for connecting the planetary carrier connecting structure is arranged on the other side.

[0021] Among them, Figure 3 , Figure 4 As shown, one side of the first-stage planet carrier 2 (the left side in the figure) is provided with a first-stage sun gear inlet 23 for cooperating with the first-stage sun gear (not shown in the figure), and the other side (the right side in the figure) is provided with a planet carrier connection structure for connecting to the second-stage sun gear.

[0022] The planet carrier connection structure includes a countersunk hole 22 arranged at the center of one side of the primary planet carrier, a groove 21 arranged on the opening side of the countersunk hole for facilitating welding of the secondary sun gear on the primary planet carrier, and a positioning circular hole 24 arranged on the side of the countersunk hole away from the groove and connected to the countersunk hole and used to locate the insertion depth of the secondary sun gear. The cross-sectional shape of the countersunk hole can be any one of a circle, a polygon, and a rounded polygon. Of course, it can also be other shapes. The polygon can be a square, and the rounded polygon can be a rounded square. When designing, the diameter of the positioning circular hole is smaller than the outer contour size of the countersunk hole, so that the first positioning end face 25 is formed at the connection between the two.

[0023] And as Figure 2 , Figure 3 It can be known that the sun gear connection structure 12 includes a positioning cone 122 arranged at the other end of the secondary sun gear for adapting to the positioning circular hole of the primary planet carrier, and a matching structure arranged on the secondary sun gear and close to the positioning cone for matching the countersunk hole of the primary planet carrier. The matching structure is a cylinder, and the outer contour of the cylinder is any one of a circle, a polygon, and a rounded polygon. Of course, it can also be other shapes. The diameter of the positioning cone is smaller than the outer contour size of the cylinder, so that the connection between the positioning cone and the cylinder forms a second positioning end face 121 for connecting with the planet carrier. The outer side of the positioning cone is provided with a welding groove 123 for facilitating the insertion of the secondary sun gear into the positioning circular hole of the primary planet carrier and welding and fixing it.

[0024] Depend on Figure 3 It can be seen that the secondary sun gear 1 is positioned by cooperating with the positioning circular hole 24 of the primary planet carrier 2 through the positioning cylindrical table 122, and the axial position is limited by the second positioning end face 121 and the first positioning end face 25 in the primary planet carrier 2; the sun gear connection structure 12 of the secondary sun gear 1 is matched with the planet carrier connection structure of the primary planet carrier 2; the secondary sun gear 1 is welded as a whole through the outer groove 21 and the inner groove 22 of the primary planet carrier 2.

[0025] The fit between the positioning frustum 122 and the positioning round hole 24 ensures the coaxiality of the secondary sun gear 1 and the primary planet carrier 2. The positioning end face 121 and the positioning end face 25 of the primary planet carrier 2 limit the axial positioning of the secondary sun gear 1 and the primary planet carrier 2. The sun gear connection structure 12 in the secondary sun gear 1 is placed in the mating hole of the primary planet carrier 2, which can not only play a positioning role but also avoid the weld from being stressed.

[0026] The torque of the primary sun gear of the shearer planetary reducer is transmitted to the primary planet carrier 2 through the sun gear inlet 23. Since the primary planet carrier 2 and the secondary sun gear 1 are welded into a whole through the groove 21 and 123, the torque is naturally transmitted to the secondary sun gear 1. The secondary sun gear 1 transmits the torque to the next-level transmission mechanism through the transmission gear teeth 11.

[0027] In the utility model, the primary planet carrier 2 and the secondary sun gear 1 are welded into a whole, avoiding the problem of transmission failure caused by the failure of the spline tooth surface when the primary planet carrier and the secondary sun gear are two parts in the prior art. Thus, while ensuring the reliability and stability of the transmission structure, the service life is improved. Moreover, the welded planet carrier reduces the space required for the planetary reducer, and compared with the overall direct forging, the processing difficulty is reduced, saving the manufacturing cost.

[0028] Although the above has described the utility model in detail, the utility model is not limited thereto. Those skilled in the art of this technology can make modifications according to the principle of the utility model. Therefore, all modifications made according to the principle of the utility model should be understood to fall within the protection scope of the utility model.

Claims

1. A planetary carrier mechanism for a coal mining machine, comprising a primary planetary carrier and a secondary sun gear, characterized in that: A planet carrier connection structure for connecting the secondary sun gear is disposed on one side of the primary planet carrier, and a primary sun gear entrance for the primary sun gear to pass through is disposed on the other side of the primary planet carrier; One side of the secondary sun gear is provided with transmission gear teeth, and the other side is provided with a sun gear connection structure for connecting with the planet carrier connection structure.

2. The planetary carrier mechanism of the coal mining machine according to claim 1, characterized in that: The planet carrier connection structure includes a countersunk hole arranged at the center of one side of the primary planet carrier for connecting to the sun gear connection structure.

3. The planetary carrier mechanism of the coal mining machine according to claim 2, characterized in that: The planet carrier connection structure also includes a groove arranged on the opening side of the countersunk hole of the first-stage planet carrier to facilitate welding of the second-stage sun gear to the first-stage planet carrier.

4. The planetary carrier mechanism of the coal mining machine according to claim 3, characterized in that: The planet carrier connection structure also includes a positioning circular hole arranged on the primary planet carrier, which is connected to the counterbore and located on a side of the counterbore away from the groove and is used to position the secondary sun gear.

5. The planetary carrier mechanism of the coal mining machine according to claim 4, characterized in that: The sun gear connection structure includes a positioning circular table arranged at the other end of the secondary sun gear and used to adapt to the positioning circular hole of the primary planet carrier.

6. The planetary carrier mechanism of the coal mining machine according to claim 5, characterized in that: The sun gear connection structure also includes a matching structure disposed on the secondary sun gear and close to the positioning frustum for matching the countersunk hole of the primary planet carrier.

7. A coal mining machine, characterized in that: It comprises a coal mining machine planetary carrier mechanism as described in any one of claims 1-6.

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