Positioning device for assembling planetary gear shaft of planetary mechanism

Abstract

The utility model discloses a positioning device for assembling a planetary gear shaft of a planetary mechanism, the planetary mechanism comprises a planetary carrier, a bearing, an inner spacer bush and a planetary gear, the bearing, the inner spacer bush and the planetary gear are mounted on the planetary carrier, and the positioning device comprises a plurality of first positioning mandrels, a plurality of second positioning mandrels and a plurality of second positioning mandrels, the second positioning mandrel is used for being inserted into a central through hole of the planet carrier; and the planet carrier positioning sleeve is sleeved on an excircle step of the planet carrier. According to the positioning device, when a planetary mechanism is assembled, the centers of a planetary wheel shaft, a planetary carrier pin shaft hole and a planetary wheel bearing hole are easy to align, when the planetary wheel shaft is knocked, a planetary wheel assembly is not prone to moving in a planetary carrier, an inner spacer bush is not prone to moving in an inner hole of a planetary wheel, and it is guaranteed that the planetary wheel shaft is smoothly installed; and the mounting precision and efficiency of the planet wheel shaft are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of shearers, in particular to a positioning device for assembling the planet gear shaft of a planetary mechanism. Background Technique

[0002] A shearer is one of the important devices for realizing the mechanization and modernization of coal mine production, and the first- and second-stage planetary reduction mechanisms are also one of the main components of the cutting part and the traction part of the shearer. The planetary reduction mechanism mainly consists of parts such as a sun gear, planet gears, an internal gear ring, a planet carrier, and bearings. The main characteristics of planetary gear transmission are small volume, large load-bearing capacity, and stable operation. In order to ensure its quality, it is necessary to strictly control its manufacturing accuracy and installation accuracy.

[0003] During the conventional installation of the planetary reduction mechanism (see Figure 6 the structure of the planetary reduction mechanism), the fitter master often freezes the planet gear shaft first, then installs the planet gear assembly with bearings into the planet carrier, manually and visually aligns the centers of the planet gear bearing holes and the planet carrier pin holes (i.e., the planet gear shaft holes), straightens the center positions of the inner distance pads in the planet gears, and then takes out the frozen planet gear shaft from the refrigerator and installs it into the planet carrier pin holes and the planet gear bearing holes and installs it in place.

[0004] Since there is no special assembly tooling for installing the planet gear shaft of the existing planetary reduction mechanism, when assembling, it is not easy to align the centers of the planet gear shaft, the planet carrier pin hole, and the planet gear bearing hole. When knocking the planet gear shaft, the planet gear assembly is easy to move in the planet carrier, and the inner distance pads are easy to move in the inner holes of the planet gears, thus affecting the smooth installation of the planet gear shaft. Summary of the Invention

[0005] The purpose of the utility model is to solve the above problems, and provide a positioning device for assembling the planet gear shaft of a planetary mechanism. When assembling the planetary mechanism, it is easy to align the centers of the planet gear shaft, the planet carrier pin hole, and the planet gear bearing hole. When knocking the planet gear shaft, the planet gear assembly is not easy to move in the planet carrier, and the inner distance pads are not easy to move in the inner holes of the planet gears, ensuring the smooth installation of the planet gear shaft and improving the installation accuracy and efficiency of the planet gear shaft.

[0006] To achieve the above object of the utility model, the utility model provides a positioning device for assembling the planet gear shaft of a planetary mechanism. The planetary mechanism includes a planet carrier and bearings, inner sleeves, and planet gears installed on the planet carrier. The positioning device includes: a plurality of first positioning mandrels for inserting into the planet carrier pin holes and the planet gear bearing holes; a second positioning mandrel for inserting into the central through hole of the planet carrier; and a planet carrier positioning sleeve for sleeving on the outer circular step of the planet carrier.

[0007] Preferably, it further includes a handle connected to the second positioning mandrel for facilitating the taking and placing of the second positioning mandrel.

[0008] Preferably, the handle is threadedly connected to the second positioning mandrel.

[0009] Preferably, the plurality of first positioning mandrels include four first positioning mandrels.

[0010] Compared with the prior art, the positioning device for assembling the planet wheel shaft of the planetary mechanism of the present utility model has the following advantages:

[0011] 1. For the positioning device for assembling the planet wheel shaft of the planetary mechanism of the present utility model, when assembling the planetary mechanism, the centers of the planet wheel shaft, the pin shaft hole of the planet carrier, and the bearing hole of the planet wheel are easily aligned. When the planet wheel shaft is struck, the planet wheel assembly is not easily displaced in the planet carrier, and the inner distance pad is not easily displaced in the inner hole of the planet wheel, ensuring the smooth installation of the planet wheel shaft and improving the installation accuracy and efficiency of the planet wheel shaft.

[0012] 2. For the positioning device for assembling the planet wheel shaft of the planetary mechanism of the present utility model, the first positioning mandrel is used to quickly center each planet wheel assembly, and the second positioning mandrel and the planet carrier positioning sleeve are used to effectively limit the outer circle of each planet wheel assembly, ensuring the accurate positioning of the planet wheel assembly. At the same time, it avoids its easy displacement and the movement and assembly damage of the inner spacer sleeve of the planet wheel, thus greatly saving the assembly auxiliary time such as centering and alignment, and effectively improving the production efficiency.

[0013] The present utility model will be described in detail below with reference to the accompanying drawings. Description of the Drawings

[0014] Figure 1 It is a cross-sectional view when assembling the planetary mechanism using the positioning device for assembling the planet wheel shaft of the planetary mechanism of the present utility model;

[0015] Figure 2 It is a cross-sectional view of the first positioning mandrel of the present utility model;

[0016] Figure 3 It is a cross-sectional view of the planet carrier positioning sleeve of the present utility model;

[0017] Figure 4 It is a cross-sectional view of the second positioning mandrel of the present utility model;

[0018] Figure 5 It is a cross-sectional view of the handle of the present utility model;

[0019] Figure 6 It is a cross-sectional view of the planetary mechanism when not positioned using the positioning device for assembling the planet wheel shaft of the planetary mechanism of the present utility model. Detailed Embodiment

[0020] Such as Figure 1 、 Figure 6As shown, they are cross-sectional views of the planetary mechanism when the positioning device for assembling the planetary gear shaft of the present utility model is adopted and not adopted during the assembly of the planetary mechanism. As Figures 2 - 5 , they are cross-sectional views of each component adopted by the positioning device of the present utility model for assembly. It can be seen from the figure that the planetary mechanism of the present utility model includes a planetary carrier 1 and bearings 3, inner spacer sleeves 4, and planetary gear assemblies 5 installed on the planetary carrier. Among them, the positioning device of the present utility model includes: a plurality of first positioning mandrels 2 for inserting into the planetary carrier pin holes and planetary gear bearing holes of the planetary carrier; a second positioning mandrel 7 for inserting into the stepped holes of the planetary carrier; and a planetary carrier positioning sleeve 6 for sleeving on the outer circular step of the planetary carrier.

[0021] Specifically, the planetary mechanism using the positioning device of the present utility model to position and install the planetary gear shaft is a structure of the prior art. The structure before the planetary gear shaft is installed can be as Figure 6 shown: A central through hole 11 is opened at the center of one side (such as the upper side in Figure 6 ) of the planetary carrier 1. The outer wall of this side is a stepped outer circular step 13. Four planetary carrier pin holes 12 are opened between the outer circular step and the central through hole. The planetary gear bearing holes 51 of the four planetary gear assemblies installed on the planetary carrier correspond to the positions of the respective planetary carrier pin holes.

[0022] In order to align the center of the planetary gear shaft with the centers of the planetary carrier pin holes and planetary gear bearing holes when the planetary gear shaft is assembled onto the planetary mechanism as Figure 6 shown, and to prevent the planetary gear assemblies from easily moving around in the planetary carrier and the inner spacer sleeve from easily moving in the planetary gear bearing shaft holes when the planetary gear shaft is knocked into the above-mentioned planetary mechanism, the present utility model uses four first positioning mandrels 2 to insert into the planetary carrier pin holes and planetary gear bearing holes, a second positioning mandrel 7 to insert into the central through hole of the planetary carrier, and a planetary carrier positioning sleeve 6 to sleeve on the outer circular step of the planetary carrier.

[0023] Among them, the structures of the four first positioning mandrels of the present utility model are the same, as Figure 2As shown in the figure, the first positioning mandrel is a cylindrical stepped shaft, whose outer shape is adapted to the pin shaft hole of the planet carrier and the bearing hole of the planet gear. From top to bottom, it successively includes: a handle part 21 that is exposed outside the upper end face of the planet carrier during assembly so as to take it out from the pin shaft hole of the planet carrier and the bearing hole of the planet gear; a first fitting part 22 located below the handle part and arranged at the upper part of the pin shaft hole of the planet carrier during assembly; a second fitting part 23 located below the first fitting part and arranged in the bearing hole of the planet gear during assembly; and a third fitting part 24 located below the second fitting part and arranged at the lower part of the pin shaft hole of the planet carrier during assembly. Among them, the diameter of the handle part is smaller than that of the first fitting part, the diameter of the first fitting part is larger than that of the second fitting part, and the diameter of the second fitting part is larger than that of the third fitting part. Further, a narrowing part can be provided between the handle part and the first fitting part, and the diameter of the narrowing part is smaller than that of the handle part. The narrowing part is used as a relief groove to facilitate rolling the net pattern on the outer wall of the handle part. Among them, a through hole is opened in the center of the first positioning mandrel, and the through hole is a stepped hole, and the lower hole diameter is larger than the upper hole diameter.

[0024] Among them, as Figure 4 shown, the second positioning mandrel of the present utility model is a cylindrical stepped shaft, and the diameter of its upper part 72 is larger than that of its lower part 73. In order to facilitate positioning and prevent it from being easily disengaged after the second positioning mandrel is inserted into the stepped counterbore of the planet carrier, a boss 71 can also be provided at the upper end of the second positioning mandrel. Counterbores are respectively opened at the upper and lower parts of the second positioning mandrel, and the upper and lower counterbores are communicated through a communication hole. The diameter of the upper counterbore 74 located above is larger than that of the lower counterbore 76 located below, and the communication hole 75 is a threaded hole.

[0025] In order to facilitate inserting the second positioning mandrel into the stepped counterbore of the planet carrier or taking it out therefrom, a handle 8 is installed on the second positioning mandrel of the present utility model. As Figure 5 shown, the upper end of the handle is thick and the lower end is thin, and an external thread is provided on the outer wall of the lower end to be threadedly connected with the communication hole of the second positioning mandrel.

[0026] Among them, the planet carrier positioning sleeve 6 of the present utility model adopts the structure as Figure 3 shown, which is circular. Three holes that are communicated from top to bottom to form a through hole are opened in the center. The three holes are arranged in a stepped shape. The diameter of the first hole located at the topmost is smaller than that of the third hole located at the bottommost. The diameter of the second hole between them is larger than the diameter of the first hole and smaller than the diameter of the third hole. Among them, the diameter of the second hole is adapted to the outer diameter step size of the planet carrier. The diameter of the third hole is equivalent to the outer diameter of the planet carrier assembly.

[0027] Next, the process of assembling the planet gear shaft of the planetary mechanism using the positioning device of the present utility model will be described:

[0028] First, place the planet carrier vertically on the working platform so that the open end of the pin shaft hole of the planet carrier faces upward (see Figure 1 andFigure 6 )。 Then, the four assembled planetary gear assemblies are successively installed into the corresponding holes of the planetary carrier pin holes, initially aligning the centers of the planetary gear assemblies with the centers of the planetary carrier pin holes. Four first positioning mandrels are successively inserted through the planetary carrier pin holes and the planetary gear bearing holes, so as to correctly position and align each planetary gear assembly.

[0029] Then, insert the second positioning mandrel into the stepped counterbore of the planetary carrier, and fit the planetary carrier positioning sleeve onto the outer circular step of the planetary carrier to limit the planetary gear assemblies from which the first positioning mandrels are subsequently pulled out, preventing the planetary gear assemblies from moving back and forth and left and right when the planetary gear shafts are knocked in. The handle is pre-assembled with the second positioning mandrel into one body through threads to play the role of holding the first positioning mandrel.

[0030] Finally, take out the frozen planetary gear shafts from the refrigerator and successively and vertically install them into the planetary carrier pin holes and the planetary gear bearing holes (pull out the first positioning mandrels at the corresponding hole positions before installation), and install them in place. At the beginning of the installation, note that only a copper bar with a diameter of less than φ30 can be used to gently knock the shaft head for alignment, and then a slightly larger copper bar can be used to evenly apply force to knock. Under the condition of having a press with appropriate size and tonnage, it is preferable to use the press for press-fitting.

[0031] The utility model utilizes the stepped counterbore of the planetary carrier to insert the second positioning mandrel, utilizes the planetary carrier pin holes and the planetary gear bearing holes to insert the first positioning mandrel, and utilizes the outer circular step of the planetary carrier to fit the planetary carrier positioning sleeve, realizing the quick and correct alignment and limitation of the planetary gear assemblies, saving the assembly auxiliary time such as centering and alignment when the planetary gear shafts are assembled onto the planetary mechanism, and effectively improving the assembly accuracy and efficiency.

[0032] 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 positioning device for assembling a planetary gear shaft of a planetary mechanism, wherein the planetary mechanism comprises a planetary carrier and a bearing, an inner spacer, and a planetary gear mounted on the planetary carrier, characterized in that: The positioning device comprises: A plurality of first positioning mandrels for inserting into the pin holes of the planet carrier and the bearing holes of the planet wheels; A second positioning mandrel for inserting into the central through hole of the planet carrier; A planet carrier positioning sleeve is used to be mounted on the outer circle step of the planet carrier.

2. The positioning device for assembling the planetary gear shaft of a planetary mechanism according to claim 1, characterized in that: It also includes a handle connected to the second positioning spindle for easy removal of the second positioning spindle.

3. The positioning device for assembling the planetary gear shaft of a planetary mechanism according to claim 2, characterized in that: The handle is threadedly connected to the second positioning spindle.

4. The positioning device for assembling a planetary gear shaft of a planetary mechanism according to any one of claims 1 to 3, characterized in that: The plurality of first positioning mandrels includes four first positioning mandrels.

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