Herringbone gear centering measuring tool

Abstract

The utility model relates to a herringbone gear centering measuring tool, which comprises a horizontal plate, circular through holes formed in the centers of the top and the bottom of the horizontal plate, a plurality of first telescopic rods arranged at the top of the horizontal plate, a top plate arranged at the tops of the plurality of first telescopic rods, and a plurality of second telescopic rods arranged at the bottom of the horizontal plate, a bottom plate is arranged at the bottoms of the second telescopic rods, a measuring column is arranged in the center of the top of the bottom plate, through holes are formed in the centers of the top and the bottom of the top plate, and the top end of the measuring column penetrates through the through holes and is located above the top of the top plate; according to the utility model, the herringbone middle part on the surface of the herringbone gear is used as a reference surface, the centering error measured by the device can be measured very conveniently, three-coordinate measurement is not needed, and the device has certain practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of herringbone gears, in particular to a centering measuring tool for herringbone gears. Background Technique

[0002] Helical gears have lateral forces on the shaft. To eliminate this force, one gear is made into a helical gear with opposite symmetrical directions to eliminate this force, which looks like a herringbone and is simply called a herringbone gear.

[0003] Among them, herringbone gears have different centering accuracy requirements according to different qualities. For those with low accuracy requirements, centering accuracy can be ensured by scribing during pre-heat hobbing. For those with higher accuracy requirements, before heat treatment, after hobbing, the centering error needs to be measured on a coordinate measuring machine to ensure that after precision turning the tooth width, the tooth parts in two helix directions can form symmetry. For gears with even higher centering error requirements (generally less than 0.2 mm), in addition to measuring on a coordinate measuring machine before heat treatment to achieve centering in turning, after rough grinding after heat treatment, it needs to be measured again, and then precision grinding is carried out according to the measurement results to meet the centering requirements.

[0004] However, in the prior art, for the machining of herringbone gears with higher and even higher accuracy requirements, coordinate measurement is required, which will seriously affect production efficiency. Therefore, improvement is needed. Content of the Utility Model

[0005] The purpose of the utility model is to provide a centering measuring tool for herringbone gears to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A centering measuring tool for herringbone gears includes a horizontal plate. Circular through holes are opened at the centers of the top and bottom of the horizontal plate. A plurality of first telescopic rods are arranged on the top of the horizontal plate. A top plate is arranged at the tops of the plurality of first telescopic rods. A plurality of second telescopic rods are arranged at the bottom of the horizontal plate. A bottom plate is arranged at the bottoms of the plurality of second telescopic rods. A measuring column is arranged at the center of the top of the bottom plate. Through holes are opened at the centers of the top and bottom of the top plate. The top end of the measuring column passes through the through hole, and the top end of the measuring column is located above the top of the top plate.

[0008] Preferably, a stretching block is arranged at the center of the bottom of the bottom plate.

[0009] Preferably, a plurality of scale values are arranged on the surface of the measuring column.

[0010] Preferably, the thickness of the horizontal plate is less than the thicknesses of the top plate and the bottom plate.

[0011] Preferably, the thickness of the top plate matches the thickness of the bottom plate.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] For a herringbone gear centering measuring tool of the present utility model, the middle part of the herringbone on the surface of the herringbone gear is used as a reference surface. Before use, a line can be drawn on the middle part of the herringbone on the surface of the herringbone gear by using a spirit level. Then, the herringbone gear is placed at the measuring tool horizontal plate, and the horizontal plate is aligned with the marked line. Then, the top plate and the bottom plate are respectively moved to the top and bottom of the herringbone gear. Then, the scale values from the marked part to the top plate and the bottom plate are measured through the measuring columns, and thus the centering error of the herringbone gear can be measured. The centering error measured by the present utility model can be very conveniently measured without using a coordinate measuring machine, and has certain practicability. Description of the Drawings

[0014] Figure 1 is a schematic top view structure of the present utility model;

[0015] Figure 2 is a schematic bottom view structure of the present utility model.

[0016] In the figure: 1, horizontal plate; 2, first telescopic rod; 3, top plate; 4, second telescopic rod; 5, bottom plate; 6, measuring column; 7, through hole; 8, stretching block. Specific Embodiments

[0017] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0018] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "vertical", "upper", "lower", "horizontal", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0019] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0020] Please refer to Figure 1-2 , the present utility model provides a technical solution:

[0021] A herringbone gear centering measuring tool, comprising a horizontal plate 1. Circular through holes are provided at the centers of the top and bottom of the horizontal plate 1. A plurality of first telescopic rods 2 are provided on the top of the horizontal plate 1. A top plate 3 is provided at the tops of the plurality of first telescopic rods 2. A plurality of second telescopic rods 4 are provided at the bottom of the horizontal plate 1. A bottom plate 5 is provided at the bottoms of the plurality of second telescopic rods 4. A measuring column 6 is provided at the center of the top of the bottom plate 5. Through holes 7 are provided at the centers of the top and bottom of the top plate 3. The top end of the measuring column 6 passes through the through hole 7, and the top end of the measuring column 6 is located above the top of the top plate 3.

[0022] Further, a stretching block 8 is provided at the center of the bottom of the bottom plate 5.

[0023] Further, a plurality of scale values are provided on the surface of the measuring column 6.

[0024] Further, the thickness of the horizontal plate 1 is less than the thicknesses of the top plate 3 and the bottom plate 5.

[0025] Further, the thickness of the top plate 3 matches the thickness of the bottom plate 5.

[0026] Specifically, the scale values on the surface of the measuring column 6 in the present utility model are divided into long lines and short lines. The distances between each long line match. Nine short lines are divided between two long lines, and the distances between the short lines are the same. Therefore, the centering error can be measured through the scale values.

[0027] It should be noted that the thickness of the horizontal plate 1 matches the thickness of the long scale lines.

[0028] Working principle: When in use, the middle part of the herringbone pattern on the surface of the herringbone gear needs to be used as the reference plane. A line can be drawn on the middle part of the herringbone pattern on the surface of the herringbone gear with a spirit level. Then, place the herringbone gear into the circular through-hole of the measuring tool's horizontal plate 1, align the horizontal plate 1 with the marked line, and then move the top plate 3 and the bottom plate 5 to the top and bottom of the herringbone gear respectively. It should be noted that when moving the bottom plate 5, the operator can push the stretching block 8 upward by hand, so as to make the second telescopic rod 4 expand and contract, and then make the bottom plate 5 move upward. For the movement of the top plate 3, the operator pushes the top plate 3 downward. During the downward push of the top plate 3, the first telescopic rod 1 will be compressed. Then, measure the number of scale values from the marked part to the top plate 3 and the bottom plate 5 respectively with the measuring column 6, and then measure the alignment error of the herringbone gear. The alignment error measured by this utility model can be measured very conveniently without using a coordinate measuring machine, which has a certain practicality.

[0029] It should be noted that considering the small scale values, the operator can view them through a magnifying glass.

[0030] Finally, it should be noted that in order to place the herringbone gear at the circular through-hole of the horizontal plate 1, before placing, the operator can stretch the top plate 3 upward, which can facilitate the placement of the herringbone gear.

[0031] In addition, during the use process, the operator's other hand needs to hold the fixed end of the second telescopic rod 4, so a stretching block 8 is provided to facilitate the operator to stretch the bottom plate 5.

[0032] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A herringbone gear centering measuring tool, comprising a horizontal plate (1), characterized in that: A circular through-hole is provided at the center of the top and bottom of the horizontal plate (1). A plurality of first telescopic rods (2) are provided on the top of the horizontal plate (1). A top plate (3) is provided at the top of the plurality of first telescopic rods (2). A plurality of second telescopic rods (4) are provided on the bottom of the horizontal plate (1). A bottom plate (5) is provided at the bottom of the plurality of second telescopic rods (4). A measuring column (6) is provided at the center of the top of the bottom plate (5). Through-holes (7) are provided at the center of the top and bottom of the top plate (3). The top end of the measuring column (6) passes through the through-hole (7), and the top end of the measuring column (6) is located above the top of the top plate (3).

2. The herringbone gear centering measuring tool according to claim 1, characterized in that: A stretching block (8) is provided at the center of the bottom of the bottom plate (5).

3. The herringbone gear centering measuring tool according to claim 1, characterized in that: A plurality of scale values are provided on the surface of the measuring column (6).

4. A herringbone gear centering measuring tool according to claim 1, characterized in that: The thickness of the horizontal plate (1) is less than the thicknesses of the top plate (3) and the bottom plate (5).

5. A herringbone gear centering measuring tool according to claim 1, characterized in that: The thickness of the top plate (3) matches the thickness of the bottom plate (5).

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