Tooth grinding tool for cycloidal gear multi-piece belt measurement

Abstract

The embodiment of the utility model provides a cycloidal gear multi-strip measuring and tooth grinding tool, and relates to the technical field of cycloidal gear machining. The cycloidal gear multi-piece belt measuring and tooth grinding tool comprises a base plate, a cover plate, cycloidal gear bodies, diamond pins and a liquid expansion mandrel, and the liquid expansion mandrel is vertically fixed to the center of the upper end face of the base plate and used for fixing cycloidal gear bodies with different inner diameter sizes. The hydraulic expansion mandrel is mounted on the chassis to center and fix a plurality of cycloidal gear bodies with a small size difference (about + / -0.01 mm) of center hole diameters at the same time, the rhombic pins respectively position bearing holes of the cycloidal gear bodies, the spring ball plungers are arranged in the rhombic pins and push one sides of the bearing holes, the other sides of the rhombic pins are tightly attached to the walls of the bearing holes, and accordingly the cycloidal gear bodies are fixed. A fixed angle relation between ground teeth and bearing holes is guaranteed, and a measuring mechanism can effectively reduce the diameter scatter difference of a large number of cycloidal gear body tooth profiles.

Description

Technical Field

[0001] The utility model relates to the technical field of cycloid wheel processing, in particular to a cycloid wheel multi-piece belt measuring gear grinding tool. Background Art

[0002] In the RV reducer, the cycloid wheels need to be used in pairs, and the outer diameters of the tooth profiles of the AB plate cycloid wheels need to be matched. In order to increase the probability of cycloid wheel matching, the AB plate cycloids can be ground together, and in order to improve efficiency, more than two pairs can be ground at a time. However, the traditional processing method has great problems and it is difficult to realize the grinding of multiple pairs of cycloid wheels.

[0003] According to Chinese patent publication number: CN115635147B, a cycloidal gear pair grinding tool is disclosed, which includes a base, a transition plate, a pressure cover, a front cycloidal gear, a rear cycloidal gear, a diamond-shaped positioning pin, and a circular positioning pin. The base is fixedly connected to the gear grinding equipment, and the front cycloidal gear, transition plate, rear cycloidal gear, and pressure cover are stacked and positioned on the base in sequence. The gear grinding equipment can grind two cycloidal gears at a time, improving production efficiency, improving processing accuracy, and increasing the pairing rate of the two cycloidal gears. The cycloidal gear pair grinding tool described in this application has a reasonable structure, is easy to use, has high production efficiency, and reduces the labor burden of workers transporting materials. It effectively solves the problem of low pairing rate of cycloidal gears produced by traditional processes.

[0004] It can be seen that the existing gear grinding tooling has some disadvantages when used:

[0005] 1. Clamping is cumbersome. An additional transition plate is required. First, the part must be mounted on the transition plate, and then both the transition plate and the part must be moved to the machine fixture. Furthermore, securing plate A requires tightening the fixture on the A side, and securing plate B requires tightening the fixture on the B side. Furthermore, the tightening process involves multiple steps, including hydraulic expansion and pressure plates, making the operation cumbersome.

[0006] 2. It is heavy. The transition plate and the locking mechanisms on both sides are added. It needs to be assembled together with the cycloid and then moved to the machine tool. The overall weight is heavy, especially when processing large cycloids. The overall weight is too heavy and difficult to carry.

[0007] 3. Multiple positioning, low precision. The fixture has multiple positioning surfaces, and the positioning surfaces are movable, resulting in low overall precision. The distance between the AB plate tooth profile is large, making it difficult to match. When grinding, the upper and lower cycloid teeth actually have a slight taper. In this fixture, the distance between the AB plate is very far. When the taper is present during processing, the AB plate tooth profile diameter error is large, making it difficult to match. Utility Model Content

[0008] The purpose of this utility model is to provide a multi-piece cycloid gear grinding tool with measuring belts. This tool simplifies clamping and requires no transitional fixtures. The clamping action is simple: simply place the workpiece, and the machine automatically performs the tensioning and pressing operations. The center hole does not require precision machining; a diameter difference of ±0.01 mm is sufficient, reducing processing costs. The multiple cycloids are tightly packed together, minimizing diameter dimensional errors between pairs. The inclusion of a measuring device ensures that the diameter dispersion of the entire batch of cycloids is guaranteed.

[0009] The utility model provides a cycloidal wheel multi-piece belt measuring gear grinding tooling, comprising a chassis, a cover plate, a cycloidal wheel body, a diamond pin and a liquid expansion core shaft. The liquid expansion core shaft is vertically fixed at the center of the upper end surface of the chassis. The liquid expansion core shaft is used to fix cycloidal wheel bodies of different inner diameters. A pair of diamond pins are vertically fixed around the liquid expansion core shaft on the upper end surface of the chassis. The cover plate is located at the upper end of the chassis and is used to fix the cycloidal wheel body.

[0010] Preferably, the cycloid wheel body is provided with bearing holes and avoidance holes in a ring shape around the central hole, and at least four cycloid wheel bodies are fixed on the hydraulic expansion core shaft.

[0011] Preferably, the two diamond pins are respectively inserted into the two bearing holes of the four cycloid wheel bodies to radially position the four cycloid wheel bodies on the chassis.

[0012] Preferably, a spring ball plunger is provided inside the diamond pin, and the spring ball plunger pushes one side of the bearing hole so that the other side of the diamond pin is pressed against the inner wall of the bearing hole.

[0013] Preferably, the diamond pin support position is staggered with the avoidance hole.

[0014] Preferably, a movable meter stand is placed on one side of the chassis, and a dial indicator is mounted on the meter stand.

[0015] Preferably, the watch frame is parallel to the axis on the bottom plane of the chassis.

[0016] Preferably, the upper end of the cover plate is mounted on the shaft of the machine tool, and when the shaft of the machine tool moves, the cover plate is driven to press the cycloid wheel body.

[0017] Compared with the prior art, the cycloid wheel multi-piece belt measuring gear grinding tool provided in the embodiment of the utility model has the following advantages:

[0018] 1. The utility model simultaneously centers and fixes the cycloid wheel bodies with slight size differences (about ±0.01mm) in the center holes by installing a liquid expansion core shaft on the chassis. The diamond pins respectively locate the bearing holes of the four cycloid wheel bodies to determine the angular position. The spring ball head plunger inside pushes one side of the bearing hole so that the other side of the diamond pin is close to the bearing hole wall. The diamond pin positioning surface is not required to be at the bearing hole diameter. It can be applied to most cycloid wheels and is very convenient to clamp. The center liquid expansion can be manual or machine tool hydraulic. If machine tool hydraulics are used for liquid expansion, then only the cycloid wheel needs to be placed, and the locking is all done by the machine tool, which is very convenient. Only the single cycloid wheel body needs to be carried, which is very light.

[0019] 2. The utility model measures the diameter of the cycloid wheel body by using a movable table stand and a high-precision micrometer. If there is an error in processing, compensation and reprocessing can be carried out immediately, avoiding the situation where the cycloid wheel body is removed and the diameter error of the cycloid wheel body is measured by three-coordinate measuring methods but compensation processing cannot be carried out. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the utility model;

[0022] Figure 2 This is a schematic top view of the overall structure of an embodiment of the utility model;

[0023] Figure 3 For the embodiment of the utility model Figure 2 Schematic diagram of the structural cross-section along AA;

[0024] Figure 4 This is a schematic diagram of the structure of the cycloid wheel body and other embodiments of the present utility model;

[0025] Figure 5 For the embodiment of the utility model Figure 4 Schematic top view of the structure;

[0026] Figure 6 For the embodiment of the utility model Figure 5 Schematic diagram of the cross-section of the structure along BB;

[0027] Figure 7 This is a schematic diagram of the structure of the diamond pin and other embodiments of the present utility model;

[0028] Figure 8 The figure is a schematic structural diagram of a dial indicator according to an embodiment of the present utility model.

[0029] Reference numerals:

[0030] 1. Chassis; 2. Liquid expansion mandrel; 3. Diamond pin; 4. Spring ball plunger; 5. Opening; 6. Cycloidal wheel body; 7. Avoidance hole; 8. Bearing hole; 9. Table stand; 10. Micrometer; 11. Cover plate. DETAILED DESCRIPTION

[0031] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0032] Please refer to Figures 1-8 The embodiment of the utility model provides a cycloidal wheel multi-piece belt measuring gear grinding tooling, including a chassis 1, a cover plate 11, a cycloidal wheel body 6, a diamond pin 3 and a liquid expansion core shaft 2. The liquid expansion core shaft 2 is vertically fixed at the center of the upper end surface of the chassis 1. The liquid expansion core shaft 2 is used to fix the cycloidal wheel body 6 with different inner diameter sizes.

[0033] Among them, the hydraulic expansion core shaft 2 is usually composed of two layers of inner and outer cylinders. The inner cylinder is filled with a liquid medium, usually hydraulic oil. When pressure is applied to the liquid medium in the inner cylinder, according to Pascal's law, the liquid pressure will be evenly transmitted in all directions, causing the inner cylinder to expand outward, thereby increasing its outer diameter. This expansion will tightly adhere to and clamp the cycloid wheel body 6 placed in the outer cylinder, thereby fixing the cycloid wheel body 6. Through the ductility of the outer cylinder of the hydraulic expansion core shaft 2, it can adapt to cycloid wheel bodies 6 with different inner diameter sizes that are not much different.

[0034] like Figure 7 As shown, a pair of diamond pins 3 are vertically fixed on the upper end surface of the chassis 1 around the hydraulic expansion core shaft 2, and the cycloid wheel body 6 is annularly provided with bearing holes 8 and avoidance holes 7 around the center hole. At least four cycloid wheel bodies 6 are fixed on the hydraulic expansion core shaft 2, and two diamond pins 3 are respectively inserted into the two bearing holes 8 of the four cycloid wheel bodies 6 to radially position the four cycloid wheel bodies 6 on the chassis 1.

[0035] Because the diamond pin 3 is internally provided with a spring-loaded ball plunger 4 to determine its angular position, the spring-loaded ball plunger 4 pushes against one side of the bearing hole 8, causing the other side of the diamond pin 3 to rest against the inner wall of the bearing hole 8. The diamond pin 3 does not need to be positioned exactly at the diameter of the bearing hole 8; any position will suffice, effectively avoiding the avoidance hole 7. Because the hydraulic mandrel 2 can completely locate the center hole, even if the diamond pin 3 exerts a radial force on the cycloid wheel body 6, the hydraulic mandrel 2 can pull the cycloid wheel body 6 back to center. Therefore, the positioning effect of the diamond pin 3 is not required to be high; it only needs to ensure repeatable positioning accuracy.

[0036] like Figure 1 As shown, the cover plate 11 is located at the upper end of the chassis 1 and is used to fix the cycloid wheel body 6. The upper end of the cover plate 11 is connected to the machine tool shaft and can be fixed by screws or other methods. The machine tool shaft needs to be pressed down to tighten the cover plate 11, and then the cycloid wheel body 6 is pressed. Furthermore, a meter stand 9 is placed on one side of the chassis 1. The position of the meter stand 9 needs to be parallel to the axis of a plane of the chassis 1. A high-precision micrometer 10 is installed on the meter stand 9. The meter stand 9 and the micrometer 10 will be adjusted to 0 on a meter block in advance. The meter block is a precisely machined block with a height difference. After the three-coordinate calibration is performed on it and the meter stand 9 surface on the chassis 1, the value that needs to be adjusted can be determined. For example, the meter block can be machined according to the 0 position of the diameter of the cycloid wheel body 6. The meter stand 9 can be placed on the meter block during subsequent processing, and it can be adjusted to 0 and then used. When the cycloid wheel body 6 is almost in place, the meter stand 9 can be placed on the plane of this device, moved horizontally, and the maximum value of the meter is read. The standard radius value is subtracted, which is the current radius allowance.

[0037] There are two groups of symmetrical openings 5 on the upper end surface of the chassis 1. When installing the entire fixture, the machine tool has a chassis 1 that can rotate. A base with several screw holes is installed in advance, and then the fixture is installed on the base with screws through the openings 5 and locked.

[0038] In summary, the working principle of the cycloid wheel multi-piece belt measuring gear grinding fixture of the embodiment of the present invention is as follows: the device is placed on the main shaft of the machine tool, the standard parts are installed, the hydraulic expansion core shaft 2 is tightened, and the fixture chassis 1 is locked after adjusting the center of the device;

[0039] The specific processing is to put B piece first, then A, then B, and then A, and tighten the mandrel 2 manually or by machine. If machine tightening is used, the whole process only requires putting the cycloid wheel body 6, and then processing can be carried out. The whole device makes the four cycloid wheel bodies 6 adjacent to each other, and the diameters of the AB cycloid wheel bodies 6 are almost the same, and there are auxiliary measuring tools, which can effectively reduce the diameter dispersion of a large number of cycloids, and the clamping is very convenient. Only a single cycloid wheel body 6 is carried, which is very light.

[0040] The above is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A cycloid wheel multi-piece belt measuring gear grinding tool, comprising a chassis (1), a cover plate (11), a cycloid wheel body (6), a diamond pin (3) and a hydraulic expansion mandrel (2), characterized in that: A liquid expansion core shaft (2) is vertically fixed at the center of the upper end surface of the chassis (1), and the liquid expansion core shaft (2) is used to fix the cycloid wheel body (6) with different inner diameters. A pair of diamond pins (3) are vertically fixed around the liquid expansion core shaft (2) on the upper end surface of the chassis (1). A cover plate (11) is located at the upper end of the chassis (1) and is used to fix the cycloid wheel body (6).

2. The cycloid wheel multi-belt measuring gear grinding tool according to claim 1, characterized in that: The cycloid wheel body (6) is provided with a bearing hole (8) and an avoidance hole (7) in a ring shape around the central hole, and at least four cycloid wheel bodies (6) are fixed on the hydraulic core shaft (2).

3. The cycloid wheel multi-belt measuring gear grinding tool according to claim 2, characterized in that: The two diamond pins (3) are respectively inserted into the two bearing holes (8) of the four cycloid wheel bodies (6), so as to radially position the four cycloid wheel bodies (6) on the chassis (1).

4. The cycloid wheel multi-belt measuring gear grinding tool according to claim 3, characterized in that: A spring ball plunger (4) is provided inside the diamond pin (3), and the spring ball plunger (4) pushes against one side of the bearing hole (8), so that the other side of the diamond pin (3) is closely attached to the inner wall of the bearing hole (8).

5. The cycloid wheel multi-belt measuring gear grinding tool according to claim 4, characterized in that: The supporting position of the diamond pin (3) is staggered with the avoidance hole (7).

6. The cycloid wheel multi-belt measuring gear grinding tool according to claim 5, characterized in that: A movable meter frame (9) is placed on one side of the chassis (1), and a micrometer (10) is installed on the meter frame (9).

7. The cycloid wheel multi-belt measuring gear grinding tool according to claim 6, characterized in that: The watch frame (9) is parallel to the axis on the bottom plane of the chassis (1).

8. The cycloid wheel multi-belt measuring gear grinding tool according to claim 1, characterized in that: The upper end of the cover plate (11) is mounted on the shaft of the machine tool. When the shaft of the machine tool moves, the cover plate (11) is driven to press the cycloid wheel body (6).

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