Auxiliary tool for machining threaded hole in end face of long-head inner hole of planet carrier of wind power gear box

Abstract

The utility model provides an auxiliary tool for machining a threaded hole in the end face of a long-head inner hole of a planet carrier of a wind power gear box, which is characterized in that the auxiliary tool is of a flange structure, and a plurality of axial through holes are formed in a flange plate; the position and size parameters of the through hole are determined according to the position and size of a threaded hole in the bottom end face of the long-head inner hole of the planet carrier, and the position and size correspond to those of the threaded hole in the bottom end face of the long-head inner hole of the planet carrier; the planet carrier is vertically placed on the drilling machine workbench with the long head side facing upwards and the short head side facing downwards. A flange shaft of the tool is inserted into a bottom face center hole formed in the bottom end face of a long-head inner hole of a planet carrier, the lower plane of a flange plate is erected on the bottom end face of the long-head inner hole of the planet carrier, the lower plane of the flange plate directly abuts against and makes contact with the bottom end face of the long-head inner hole of the planet carrier, and a tool bolt is screwed into and penetrates through a threaded hole of the flange shaft of the tool. The tail end of the tool bolt is in tight abutting contact with the inner wall of a center hole in the bottom face of the planet carrier. The machining cost is saved, and the machining efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of tooling, in particular to an auxiliary tooling for machining threaded holes on the end faces of long head inner holes of planetary frames of wind power gear boxes. Background Art

[0002] Wind power generation has experienced rapid growth in recent years due to its pollution-free operation and low construction costs. The machining efficiency of gearbox components plays a crucial role. Gear transmissions within gearboxes are primarily divided into parallel-stage and planetary-stage gear transmissions. The planetary carrier is a key component of planetary-stage gear transmissions, mounting the planetary shafts or bearings on it. A variety of machining tools are used during the processing of the planetary carrier.

[0003] At present, when processing the threaded hole on the end face of the inner hole of the long head of the planetary carrier, it is usually completed on a machining center. Whether it is processed on a vertical machining center or a horizontal machining center, tooling is required for clamping and fixing.

[0004] Technical solution of prior art 1:

[0005] When machining the threaded holes on the inner end face of the planetary carrier's long head on a vertical machining center, the large end face on the short end of the planetary carrier is supported by using equal-height blocks. A pressure plate is then used to press the inner end face of the planetary carrier's short end face. After securely clamping, the workpiece must be aligned on the machine tool to ensure the relative position of the threaded holes on the inner end face of the planetary carrier's long head before machining can begin.

[0006] Disadvantages of the prior art 1:

[0007] 1. When processing planetary carriers of different models, due to the inconsistent heights of the shaft diameters on the short head side of the planetary carrier, it is necessary to pre-produce various height-matching spacers or T-bolts, which are not universal and result in high processing costs.

[0008] 2. Machining the threaded hole on the end face of the long head inner hole of the planetary carrier on the vertical machining center requires re-aligning the workpiece, which takes a long time;

[0009] 3. The processing cost of vertical machining center equipment is high, which leads to high processing costs of parts.

[0010] Technical solution of existing technology 2:

[0011] When machining the threaded holes on the end faces of the long head inner hole of the planetary carrier on a horizontal machining center, two V-shaped irons are used to support the large end face outer circles on the long head side and short head side of the planetary carrier, the long head side shaft diameter of the planetary carrier is supported by a jack, and the rib plate at the open surface of the planetary carrier is pressed tightly by a pressure plate. After being clamped and fixed firmly, in order to ensure the relative position of the threaded holes on the end faces of the long head inner hole of the planetary carrier, the position of the workpiece needs to be aligned by the machine tool before machining can be carried out.

[0012] Disadvantages of the second prior art:

[0013] 1. When processing planetary carriers of different models, due to the inconsistency between the outer diameter of the planetary carrier and the diameter of the shaft on the long head side, it is necessary to make various height-matching pads or V-shaped irons in advance, which are not very versatile and lead to high processing costs;

[0014] 2. Machining the threaded hole on the end face of the long head inner hole of the planetary carrier on the horizontal machining center requires re-aligning the workpiece, which takes a long time;

[0015] 3. The processing cost of horizontal machining center equipment is high, which leads to high processing costs of parts. Utility Model Content

[0016] The utility model provides an auxiliary tooling for machining threaded holes on the end faces of the long head inner holes of a planetary frame of a wind power gearbox, which aims to solve the shortcomings of the prior art, save machining costs, improve machining efficiency, and is simple to use and convenient to assemble and disassemble.

[0017] The technical solution adopted by the utility model to solve its technical problems is:

[0018] Auxiliary tooling for machining threaded holes on the inner end face of the long head of the planetary frame of a wind power gearbox, characterized by:

[0019] The auxiliary tooling is a flange structure including a flange plate and a flange shaft. The flange plate is provided with a plurality of axial through holes. The positions and size parameters of the through holes are determined according to the positions and sizes of the threaded holes on the bottom end surface of the long head inner hole of the planetary carrier to be processed. The positions and sizes correspond to the threaded holes on the bottom end surface of the long head inner hole of the planetary carrier.

[0020] The planet carrier is placed vertically on the drilling machine workbench with the long head side facing upward and the short head side facing downward; the flange shaft of the tooling is inserted into the center hole opened in the bottom end surface of the long head inner hole of the planet carrier, and the lower plane of the flange plate is placed on the bottom end surface of the long head inner hole of the planet carrier, and the lower plane of the flange plate directly contacts the bottom end surface of the long head inner hole of the planet carrier;

[0021] Two threaded holes are opened on the flange shaft of the tooling, and the tooling bolts are screwed into and pass through the threaded holes, and the tail ends of the tooling bolts are in tight contact with the inner wall of the center hole on the bottom surface of the planetary frame.

[0022] The flange shaft and the center hole of the bottom surface are clearance fit.

[0023] The height of the flange shaft is greater than half of the axial length of the center hole of the bottom surface.

[0024] The two transverse threaded holes on the flange shaft are symmetrically distributed.

[0025] The utility model is beneficial in that:

[0026] 1) A separate auxiliary tool is used to process the threaded hole on the inner end face of the long head of the planetary carrier, without the need for equal height blocks, which effectively saves tooling costs;

[0027] 2) Using the auxiliary tooling for machining the threaded hole on the inner end face of the planetary carrier long head eliminates the need to find the center of the workpiece, saving time in calibrating the workpiece and effectively improving machining efficiency;

[0028] 3) The auxiliary tooling for machining the threaded holes on the end faces of the inner holes of the long heads of planetary carriers can be used for machining on ordinary drilling machines and can effectively ensure the relative positions of the threaded holes on the end faces of the inner holes of the long heads of planetary carriers. It does not need to be machined on a machining center, effectively reducing machining costs.

[0029] 4) This fixture uses two evenly spaced fixture bolts installed on the fixture flange to contact the center hole on the bottom surface of the long head inner hole of the planetary carrier. By tightening the bolts to control the extension length of the bolts, it can be used for center holes with different inner diameters, making this fixture more versatile. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0031] Figure 1 This is a schematic diagram of the installation position of the auxiliary tooling of the utility model;

[0032] Figure 2 This is a top view of the auxiliary tooling of the utility model;

[0033] Figure 3 This is a cross-sectional view of the auxiliary tooling of the present utility model. DETAILED DESCRIPTION

[0034] In order to more clearly illustrate the technical solution of the present invention, the following will briefly introduce the drawings required for the description. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other embodiments can be obtained based on these drawings without inventive work. In order to facilitate understanding of the present invention, the following will be described in more detail with reference to the drawings and specific embodiments.

[0035] It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more elements can be present in between. When an element is described as being "connected" to another element, it can be directly connected to the other element, or one or more elements can be present in between. The terms "upper", "lower", "inner", "outer", "bottom", etc. used in this specification indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0036] like Figure 1 、 Figure 2 、 Figure 3 As shown:

[0037] The planet carrier 2 is placed on the drilling machine table 1 for processing. The planet carrier 2 is placed vertically on the drilling machine table 1 with the long head side facing up and the short head side facing down.

[0038] The tooling 3 is an integral flange structure having a flange plate 31 and a flange shaft 32 .

[0039] The lower plane of the flange 31 of the tooling 3 is mounted on the bottom end surface 22 of the long head inner hole 21 of the planetary carrier 2. The lower plane of the flange 31 is directly in contact with the bottom end surface 22 of the long head inner hole 21 of the planetary carrier 2. The flange shaft 32 of the tooling 3 needs to be inserted into the bottom center hole 23 of the long head inner hole 22 of the planetary carrier 2. There is a certain gap between the shaft diameter 32 of the tooling 3 and the inner wall of the bottom center hole 23. Two symmetrically distributed transverse threaded holes 34 are opened on the flange shaft 32 of the tooling 3. The tooling bolt 4 is screwed into and passes through the threaded hole 34. By tightening the tooling bolt 4, the protruding length of the tooling bolt 4 is controlled so that the tail end of the tooling bolt 4 is in close contact with the inner wall of the bottom center hole 23 of the planetary carrier 2 at the most appropriate position and is fixed.

[0040] Figure 2 There are six through holes 33 in the central axis direction, which are determined based on the number of six threaded holes on the bottom end surface 22 of the long head inner hole 21 to be processed. The through holes 33 can be opened according to specific circumstances.

[0041] The radial distance A1 between the midpoint of the line connecting the centers of two individually adjacent through holes 33 and the center of the circle, the diameter A2 of the two individually adjacent through holes 33, the distance A3 between the centers of the two individually adjacent through holes 33, the diameter A4 of the four circumferentially evenly distributed through holes 33, and the diameter A5 of the circle in which the centers of the circumferentially evenly distributed through holes 33 lie, all correspond to the corresponding position and size data of the threaded hole on the bottom end face 22 of the long head inner hole 21 to be processed.

[0042] Figure 3 The diameter B1 of the middle flange 31, the diameter B2 of the flange shaft 32, the wall thickness B3 of the flange shaft 32, the height B4 of the flange shaft 32, and the thickness B5 of the flange 31 need to be determined according to the size of the bottom center hole 23 opened at the bottom end of the bottom end surface 22 of the long head inner hole 21.

[0043] The diameter B1 of flange 31 needs to be based on Figure 2 The through holes 33 are formed on the flange 31 so that the diameter B1 of the flange 31 is greater than the diameter A5 of the circle where the centers of the through holes 33 are evenly distributed.

[0044] The diameter B2 of the flange shaft 32 needs to be based on Figure 1 The diameter of the center hole 23 of the bottom surface is determined. After the flange shaft 32 is inserted into the center hole 23 of the bottom surface, it is matched with the center hole 23 of the bottom surface with a small gap, because the fixation of the tooling 3 is fixed by the tooling bolt 4 contacting the inner wall of the center hole 23 of the bottom surface.

[0045] The wall thickness B3 of the flange shaft 32 and the thickness B5 of the flange plate 31 can be adjusted according to the strength to be achieved by the tooling.

[0046] The height B4 of the flange shaft 32 is determined by the axial dimension of the bottom center hole 23 . It is necessary to ensure that the height B4 of the flange shaft 32 is greater than half of the axial length of the bottom center hole 23 to ensure installation stability.

[0047] The existing method for machining threaded holes in the inner end face of the planetary carrier's long head is to process them on a vertical machining center or a horizontal machining center. The coordinates required for the machine tool's spindle are calculated in advance based on the position of the threaded holes on the inner end face of the planetary carrier's long head, and the machine tool's machining accuracy is guaranteed. Specialized tooling is required for clamping and securing the workpiece before machining. To ensure the position of the threaded holes on the inner end face of the planetary carrier's long head, the workpiece must be calibrated before machining can begin. This method often results in low machining efficiency.

[0048] This tooling directly uses an integral flange sleeve tooling, and the tooling 3 and the flange shaft 32 can be directly inserted into the bottom center hole 23 of the long head inner hole 22 of the planetary carrier 2, and the tooling bolt 4 is screwed into and passes through the threaded hole 34 of the flange shaft 32, so that the tail end of the tooling bolt 4 is fixed to the inner wall of the bottom center hole 23 of the planetary carrier 2, and the lower plane of the flange 31 of the tooling 3 is in direct contact with the bottom end face 22 of the long head inner hole 21 of the planetary carrier 2, and the through hole 33 on the flange 31 is pre-processed according to the relative position of the threaded hole at the bottom end face 22 of the long head inner hole 21 of the planetary carrier 2. It is sufficient to directly use a drilling machine to align the position of the through hole 33 on the flange 31 to process the threaded hole, so that the position of the threaded hole at the bottom end face 22 of the long head inner hole 21 of the planetary carrier 2 can be guaranteed.

[0049] Since the fixture 3 is fixed by the fixture bolt 4 contacting the inner wall of the bottom center hole 23, the fixture 3 is firmly connected to the planetary carrier 2. When the threaded hole is processed, the fixture 3 will not shake, thereby ensuring the processing accuracy of the threaded hole.

[0050] Since the planet carrier 2 is produced in large quantities each time rather than individually designed and produced, the tooling 3 is universal.

[0051] The advantages of this utility model tooling are:

[0052] The advantages of this utility model tooling are:

[0053] 1. The tooling structure is simple and easy to process and manufacture;

[0054] 2. No need to use a machining center for processing, it can be completed on an ordinary drilling machine, saving processing costs;

[0055] 3. Easy to disassemble and assemble, no other workpiece clamping tooling is required;

[0056] 4. The relative position of the threaded holes can be guaranteed without correcting the workpiece before processing, which improves processing efficiency.

[0057] 5. Fix it by contacting the two bolts pre-installed on the tooling shaft with the center hole on the bottom surface of the long head inner hole. The bolts have a certain expansion and contraction range and can be used on planetary carriers of different models.

[0058] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other. The above description of the disclosed embodiments enables professionals and technicians in this field to implement or use the utility model. Various modifications to these embodiments will be obvious to professionals and technicians in this field. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. Auxiliary tooling for machining threaded holes on the inner end face of the long head of the planetary frame of a wind turbine gearbox, characterized by: The auxiliary tooling is a flange structure including a flange plate and a flange shaft. The flange plate is provided with a plurality of axial through holes. The positions and size parameters of the through holes are determined according to the positions and sizes of the threaded holes on the bottom end surface of the long head inner hole of the planetary carrier to be processed. The positions and sizes correspond to the threaded holes on the bottom end surface of the long head inner hole of the planetary carrier. The planet carrier is placed vertically on the drilling machine workbench with the long head side facing upward and the short head side facing downward; the flange shaft of the tooling is inserted into the center hole opened in the bottom end surface of the long head inner hole of the planet carrier, and the lower plane of the flange plate is placed on the bottom end surface of the long head inner hole of the planet carrier, and the lower plane of the flange plate directly contacts the bottom end surface of the long head inner hole of the planet carrier; Two threaded holes are opened on the flange shaft of the tooling, and the tooling bolts are screwed into and pass through the threaded holes, and the tail ends of the tooling bolts are in tight contact with the inner wall of the center hole on the bottom surface of the planetary frame.

2. The auxiliary tooling for machining threaded holes on the end faces of the long head inner holes of the planetary carrier of a wind turbine gearbox according to claim 1, characterized in that: The flange shaft and the center hole of the bottom surface are clearance fit.

3. The auxiliary tooling for machining threaded holes on the end faces of the long head inner holes of the planetary carrier of a wind turbine gearbox according to claim 1, characterized in that: The height of the flange shaft is greater than half of the axial length of the center hole of the bottom surface.

4. The auxiliary tooling for machining threaded holes on the end faces of the long head inner holes of the planetary carrier of a wind power gearbox according to claim 1, characterized in that: The two transverse threaded holes on the flange shaft are symmetrically distributed.

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