Gear grinding machining tool

Abstract

A gear grinding machining tool comprises a gear grinding mandrel, center holes allowing the gear grinding mandrel to be fixed to a gear grinding machine tool are formed in the centers of the end faces of the two ends of the gear grinding mandrel respectively, a blocking table is arranged on the gear grinding mandrel in the circumferential direction of the gear grinding mandrel, and the side, located on the blocking table, of the gear grinding mandrel is a straight section used for installing a straight inner hole gear. The other side, located on the blocking table, of the gear grinding mandrel is a conical section used for installing a conical inner hole gear. According to the utility model, the influence on the tooth shape of the gear caused by the magnitude of interference during large interference assembly can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of gear grinding processing, in particular to a gear grinding processing tool. Background Art

[0002] Gear grinding is a process used to improve gear meshing accuracy and surface quality, offering several significant advantages. First, gear grinding significantly enhances gear machining accuracy. Grinding removes minor surface defects and irregularities, resulting in a more accurate tooth profile, ensuring smooth meshing and reliable transmission. This high-precision process helps reduce noise and vibration during gear operation. Second, gear grinding improves gear surface quality. Grinding creates a uniform finish and reduces surface roughness. Gear grinding not only enhances gear wear resistance but also extends its service life. Smooth tooth surfaces effectively reduce friction and wear, reducing the need for repairs and replacements. Furthermore, gear grinding helps improve gear load-bearing capacity. The precise tooth profile and high-quality surface finish ensure optimal performance under heavy loads, preventing transmission failures caused by gear deformation or damage. This is particularly important in high-load, high-speed applications.

[0003] Existing gears are usually fixed on the machine tool by clamping tooling during gear grinding. After the gear grinding process is completed, it needs to be directly assembled on the use shaft. When the gear is assembled on the use shaft, there will be excessive extrusion pressure due to the large interference fit. Excessive extrusion pressure will cause the tooth shape of the gear to change or aggravate the stress concentration phenomenon at the edge of the mating surface. Working in this environment for a long time will increase the occurrence of gear fatigue failure, reduce the gear grinding accuracy, shorten the service life of the gear, and increase the maintenance and replacement cost. Utility Model Content

[0004] The utility model aims to provide a gear grinding tool, which can reduce the influence of interference on the gear tooth shape during large interference assembly.

[0005] In order to solve the above technical problems, the specific solution adopted by the present invention is a gear grinding processing tool: it includes a gear grinding mandrel, and the centers of the end faces of both ends of the gear grinding mandrel are respectively provided with top holes for fixing it on the gear grinding machine tool. A stop platform is provided on the gear grinding mandrel along its circumference. The gear grinding mandrel is located on one side of the stop platform for installing a straight section for installing a straight inner hole gear, and the gear grinding mandrel is located on the other side of the stop platform for installing a conical section for installing a conical inner hole gear.

[0006] As another optimization solution for the above-mentioned gear grinding tooling: multiple oil channels are opened in the radial direction of the cone section, and an oil groove is opened in the circumferential direction of the outer surface of the cone section. The oil groove is connected to the oil channel to allow hydraulic oil to flow into the contact surface between the cone section and the cone inner hole gear; a hydraulic threaded hole connected to the oil channel is opened in the grinding core shaft.

[0007] As another optimization solution of the above-mentioned gear grinding tooling: a hydraulic connector is installed in the open end of the hydraulic threaded hole on the end face of one end of the grinding core shaft.

[0008] As another optimization solution for the above-mentioned gear grinding tooling: there are two oil channels, the two oil channels are parallel to each other, and the path of the hydraulic threaded hole is arranged to intersect the two oil channels in a cross shape.

[0009] As another optimization solution for the above-mentioned gear grinding tooling: the grinding core shaft is divided into a straight section, a tapered section and an installation straight section in sequence, and the stop is set at the connection between the straight section and the tapered section.

[0010] As another optimization solution for the above-mentioned gear grinding tooling: the installation straight section of the grinding mandrel consists of a large section and a small section, and a locking nut is installed on the large section of the grinding mandrel to prevent axial movement of the tapered inner hole gear.

[0011] As another optimization solution for the above-mentioned gear grinding tooling: a plurality of threaded holes are opened on the retaining platform, and top screw bolts for supporting and assisting the disassembly of tapered inner hole gears or straight inner hole gears are installed in the threaded holes.

[0012] As another optimization solution for the above-mentioned gear grinding tooling: there are two threaded holes on the retaining platform, and the two threaded holes are symmetrically arranged.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The gear grinding mandrel of the utility model is suitable for assembling gears with large interference fit. When the gear is disassembled and assembled on the working shaft after the gear grinding process is completed, the tooth shape of the gear can be consistent with that when it is assembled on the gear grinding mandrel, avoiding the situation that the gear is not assembled on the gear grinding mandrel for gear grinding and then assembled on the working shaft, which may cause the tooth shape to change due to a large interference fit. The gear grinding process accuracy and the service life of the gear are improved, and the maintenance and replacement costs are reduced.

[0015] In addition, the straight section on the grinding core shaft of the utility model located on the left side of the stop table can be interference fitted with the straight internal hole gear to be ground, and the conical section on the grinding core shaft located on the right side of the stop table can be interference fit with the conical internal hole gear to be ground. The grinding assembly of straight internal hole gears or conical internal hole gears can be achieved through one workpiece, thereby improving the application range of the grinding core shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the main structure of the gear grinding mandrel of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the utility model in which a conical inner hole gear is assembled on a gear grinding core shaft;

[0018] Figure 3 This is a schematic diagram of the structure of a straight inner hole gear assembled on a gear grinding core shaft of the utility model.

[0019] Figure numerals: 1. Gear grinding core shaft, 101. Straight section, 102. Conical section, 103. Small section, 104. Large section, 105. Stop, 1051. Threaded hole, 1052. Top screw bolt, 2. Hydraulic threaded hole, 3. Oil groove, 4. Locking nut, 5. Hydraulic joint, 6. Conical inner hole gear, 7. Straight inner hole gear. DETAILED DESCRIPTION

[0020] The technical solution of the present invention is further elaborated in detail below in conjunction with specific embodiments. Parts not described in detail in the following embodiments of the present invention, such as the disassembly of the tapered inner hole gear by passing hydraulic oil into the tapered section of the grinding core shaft, should be immediately known to those skilled in the art or should be known to the prior art.

[0021] like Figure 1-3 As shown, a gear grinding tool includes a gear grinding core shaft 1. A center hole (not shown in the figure) is respectively opened at the center position of the left and right end faces of the gear grinding core shaft 1. The center on the gear grinding machine can be respectively pressed against the center holes on the end faces of the gear grinding core shaft 1. The gear grinding core shaft 1 is fixed to the gear grinding machine tool through the tight fit between the center and the center hole, and the entire gear grinding core shaft 1 is driven to rotate by the rotation of the center on the gear grinding machine tool.

[0022] The grinding mandrel 1 is divided from left to right into a straight section 101, a tapered section 102, and an installation straight section 101, which is connected to the large diameter end of the tapered section 102. The installation straight section 101 consists of a large section 104 and a small section 103, which is connected to the small diameter end of the tapered section 102.

[0023] A stop 105 is circumferentially provided on the grinding core shaft 1 at the connection between the straight section 101 and the conical section 102. The straight section 101 can be used to install the straight inner hole gear 7 by interference fit, and the conical section 102 can be used to install the conical inner hole gear 6 by interference fit. The left end face of the conical inner hole gear 6 installed on the conical section 102 is tightly against the stop 105, and a locking nut 4 is installed on the large section 104. The locking nut 4 is arranged to fit the right end face of the conical inner hole gear 6 to prevent the conical inner hole gear 6 from axial sliding on the conical section 102.

[0024] Two parallel oil passages (not shown) are radially defined within the conical section 102. Two oil grooves 3 are circumferentially defined on the outer periphery of the corresponding conical section 102. Each groove 3 communicates with a corresponding oil passage. A hydraulic threaded hole 2 is axially defined within the straight mounting section 101 and conical section 102 of the gear grinding mandrel 1. The path of the hydraulic threaded hole 2 connects to the two oil passages and intersects them in a cross pattern. The open end of the hydraulic threaded hole 2 is located on the right end face of the gear grinding mandrel 1, and a hydraulic connector 5 is mounted at this open end.

[0025] When it is necessary to remove the bevel internal bore gear 6 from the cone section 102, the hydraulic joint 5 is connected to the pipeline for conveying hydraulic oil. The hydraulic oil passes through the hydraulic threaded hole 2, the oil channel, and the oil groove 3 in sequence, and then contacts the inner wall of the bevel internal bore gear 6. Under the hydraulic pressure of the hydraulic oil, the bevel internal bore gear 6 can be removed. In addition, two threaded holes 1051 are evenly spaced on the retaining platform 105. The threaded holes 1051 are equipped with jack screws 1052. When removing the straight internal bore gear 7 or the bevel internal bore gear 6, the jack screws 1052 pass through the threaded holes 1051 and abut against the end face of the corresponding straight internal bore gear 7 or the bevel internal bore gear 6, thereby assisting in removing the straight internal bore gear 7 or the bevel internal bore gear 6.

[0026] The process of assembling the straight inner hole gear 7 or the bevel inner hole gear 6 on the gear grinding core shaft 1 for gear grinding in the present invention is as follows: when the straight inner hole gear 7 is subjected to gear grinding, the straight inner hole gear 7 is first installed on the straight section 101 of the gear grinding core shaft 1 with an interference fit, and then the center point on the gear grinding machine is pushed into the center point holes on both end surfaces of the gear grinding core shaft 1, and the gear grinding core shaft 1 is fixed on the gear grinding machine for gear grinding. When grinding the conical inner hole gear 6, first install the conical inner hole gear 6 with an interference fit on the conical section 102 position of the grinding core shaft 1, and then install the locking nut 4 on the large section 104 to lock the conical inner hole gear 6. Similarly, the grinding core shaft 1 is fixed by pressing the top point into the top hole on the grinding core shaft 1 for grinding. When the conical inner hole gear 6 is ground, it needs to be removed. At this time, first unscrew the locking nut 4, and then connect the hydraulic joint 5 with the pipeline for conveying hydraulic oil. The hydraulic oil is passed into the oil tank 3 to remove the conical inner hole gear 6. The conical inner hole gear 6 can also be disassembled by passing the top screw bolt 1052 through the threaded hole 1051 and pressing it against the left end face of the conical inner hole gear 6 to assist in removing the conical inner hole gear 6.

Claims

1. A gear grinding tool, characterized by: The invention comprises a gear grinding core shaft (1), wherein the centers of the end faces of both ends of the gear grinding core shaft (1) are respectively provided with top holes for fixing the gear grinding core shaft on a gear grinding machine tool, a stopper (105) is provided on the gear grinding core shaft (1) along its circumference, a straight section (101) for mounting a straight inner hole gear (7) on one side of the gear grinding core shaft (1) located on the stopper (105), and a conical section (102) for mounting a conical inner hole gear (6) on the other side of the stopper (105).

2. The gear grinding tool according to claim 1, characterized in that: A plurality of oil passages are provided in the radial direction of the cone section (102); an oil groove (3) is provided on the outer peripheral surface of the cone section (102) along its circumference; the oil groove (3) is connected to the oil passage so that hydraulic oil can flow into the contact surface between the cone section (102) and the cone inner hole gear (6); and a hydraulic threaded hole (2) connected to the oil passage is provided in the gear grinding core shaft (1).

3. The gear grinding tool according to claim 2, characterized in that: A hydraulic joint (5) is installed in the open end of the hydraulic threaded hole (2) on one end surface of the gear grinding core shaft (1).

4. The gear grinding tool according to claim 2, characterized in that: There are two oil passages, which are parallel to each other, and the path of the hydraulic threaded hole (2) is arranged to intersect the two oil passages in a cross shape.

5. The gear grinding tool according to claim 1, characterized in that: The gear grinding core shaft (1) is divided into a straight section (101), a tapered section (102) and an installation straight section in sequence, and a stop (105) is arranged at the connection between the straight section (101) and the tapered section (102).

6. The gear grinding tool according to claim 5, characterized in that: The installation straight section (101) of the gear grinding core shaft (1) consists of a large section (104) and a small section (103). A locking nut (4) for preventing the cone inner hole gear (6) from axial movement is installed on the large section (104) of the gear grinding core shaft (1).

7. The gear grinding tool according to claim 1, characterized in that: A plurality of threaded holes (1051) are provided on the retaining platform (105), and top screw bolts (1052) for supporting and assisting in disassembling the tapered inner hole gear (6) or the straight inner hole gear (7) are installed in the threaded holes (1051).

8. The gear grinding tool according to claim 7, characterized in that: The number of threaded holes (1051) provided on the retaining platform (105) is two, and the two threaded holes (1051) are symmetrically arranged.

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