A device for measuring the accuracy of a gear

Abstract

The utility model discloses a kind of auxiliary devices for gear precision measurement, including workbench, the workbench is provided with the gear support to be detected, the gear support inside to be detected forms accommodating space, vertical lower center is provided in the accommodating space, upper center is provided in the upper side of lower center;Centering cone is arranged between the lower center and upper center, ball screw is arranged in the centering cone, the ball screw can be coaxially connected with the lower center and upper center. The utility model is with the help of centering cone, magnetic attraction seat and ball screw, can quickly and accurately clamp positioning gear to be detected, reduces clamping error, shortens alignment time, greatly improves production efficiency, in addition, the utility model also has the advantages that structure is simple, easy to operate, use flexible etc.

Description

Technical Field

[0001] This utility model belongs to the field of measuring device technology, and specifically relates to an auxiliary device for measuring gear accuracy. Background Technology

[0002] Gears are widely used in mechanical transmission and the entire mechanical field, and gear precision testing is a key indicator for evaluating gear quality. In recent years, with the development of new energy electric vehicles, the precision requirements for gears have become even higher, reaching GB1-2 level. Currently, the inspection of gears typically uses a mandrel-mounted inspection fixture. This method, relying on manual adjustment, makes it difficult to eliminate coaxiality deviations between the gear hole and the mandrel, easily leading to clamping errors that affect the inspection results, especially for high-end gears. Therefore, the traditional mandrel clamping method can no longer meet the inspection requirements, necessitating the development of a fixture capable of quickly and accurately clamping and positioning the gear under inspection, improving the speed and accuracy of the inspection. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an auxiliary device for gear precision measurement, so as to solve the technical problems of clamping error and poor detection accuracy in the clamping method of the inspection mandrel in the existing technology.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] An auxiliary device for measuring gear precision includes a worktable, on which a gear to be tested is mounted, and an accommodating space is formed inside the gear to be tested. A lower center is vertically mounted inside the accommodating space, and an upper center is mounted directly above the lower center.

[0006] A centering cone is provided between the lower center and the upper center, and a ball screw is installed inside the centering cone. The ball screw can be coaxially connected with the lower center and the upper center.

[0007] This utility model also has the following technical features:

[0008] Specifically, the gear bracket to be tested includes multiple support columns vertically arranged on the workbench, the multiple support columns enclosing the accommodating space, and a magnetic seat is provided on the top of the support column.

[0009] Furthermore, the ball screw includes a screw body and a nut sleeve fitted outside the screw body; a first positioning hole and a second positioning hole are respectively provided at the center of the upper and lower ends of the ball screw, the first positioning hole can cooperate with the tapered section of the upper center, and the second positioning hole can cooperate with the tapered section of the lower center.

[0010] Furthermore, the nut sleeve includes a first connecting segment and a second connecting segment that are integrally connected, and the connection between the first connecting segment and the second connecting segment forms a limiting step surface.

[0011] Furthermore, a first mounting hole is provided inside the centering cone, and the second connecting section is disposed inside the first mounting hole.

[0012] Furthermore, the first connecting section is provided with multiple stepped holes, and the centering cone is provided with multiple threaded holes that correspond one-to-one with the stepped holes and are coaxially connected.

[0013] Furthermore, the number of stepped holes and threaded holes is two each.

[0014] Compared with the prior art, this utility model has the following technical effects:

[0015] The auxiliary device for gear precision measurement provided by this utility model, with the cooperation of a centering cone and a ball screw, combined with the rapid positioning of a magnetic base, can quickly and accurately clamp and position the gear to be tested, reducing the coaxiality error of clamping, shortening the alignment time, and greatly improving production efficiency. In addition, this utility model also has the advantages of simple structure, convenient operation, and flexible use. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a structural diagram of the connection between the ball screw and the threaded sleeve of this utility model;

[0018] Figure 3 This is a top view of the centering cone of this utility model;

[0019] The meanings of the labels in the diagram are as follows:

[0020] 1-Workbench, 2-Gear bracket to be tested, 3-Lower center, 4-Upper center, 5-Centering cone, 6-Ball screw, 7-Gear to be tested; 21-Support column, 22-Magnetic seat; 51-First mounting hole, 52-Threaded hole; 61-First positioning hole, 62-Second positioning hole, 63-Screw body, 64-Nut sleeve; 641-First connecting section, 642-Second connecting section; 6411-Stepped hole.

[0021] The specific content of this utility model will be further explained in detail below with reference to the embodiments. Detailed Implementation

[0022] The following are specific embodiments of the present invention. It should be noted that the present invention is not limited to the following specific embodiments. All equivalent modifications made based on the technical solutions of this application fall within the protection scope of the present invention.

[0023] The terms “upper,” “lower,” “front,” “rear,” “top,” and “bottom” used in this utility model are for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. “Inner” and “outer” refer to the inner and outer contours of the corresponding components, and the above terms should not be construed as limitations on this utility model.

[0024] Furthermore, the terms "first," "second," and other ordinal numbers are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0025] In this invention, unless otherwise stated, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0026] Unless otherwise specified, all components in this utility model can be purchased from the market.

[0027] Example 1

[0028] Following the above technical solutions, such as Figures 1 to 3 As shown in the figure, this embodiment provides an auxiliary device for gear precision measurement, including a worktable 1, on which a gear support 2 to be tested is provided, and an accommodating space is formed inside the gear support 2. A lower center 3 is vertically arranged in the accommodating space, and an upper center 4 is arranged directly above the lower center 3; the central axes of the lower center 3 and the upper center 4 coincide.

[0029] A centering cone 5 is provided between the lower center 3 and the upper center 4. A ball screw 6 is installed inside the centering cone 5. The ball screw 6 can be coaxially connected with the lower center 3 and the upper center 4. The conical surface of the centering cone 5 can be in contact with the inner wall of the gear to be tested. The radial centering of the gear to be tested can be achieved by rotating the centering cone 5.

[0030] As a preferred embodiment, the gear support 2 to be tested includes three vertically arranged support columns 21 on the workbench 1, with adjacent support columns 21 forming a 120° angle. The three support columns 21 enclose a receiving space. A magnetic base 22 is provided on the top of the support column 21. An electromagnet is embedded on the surface of the magnetic base 22. When opened, it can attract the bottom surface of the gear to be tested, preventing the gear to be tested from being clamped or displaced. When the magnetic base 22 is closed, it can quickly release the gear to be tested.

[0031] As a preferred embodiment, the ball screw 6 includes a screw body 63 and a nut sleeve 64 sleeved outside the screw body 63; a first positioning hole 61 and a second positioning hole 62 are respectively opened at the center of the upper and lower ends of the screw body 63. The first positioning hole 61 can cooperate with the tapered section of the upper center 4, and the second positioning hole 62 can cooperate with the tapered section of the lower center 3.

[0032] When the tapered section of the upper tip 4 mates with the first positioning hole 61, and the tapered section of the lower tip 3 mates with the second positioning hole 62, the upper tip 4, the lead screw body 63, and the lower tip 3 are coaxially connected from top to bottom. This ensures the axial positioning accuracy of the gear under test.

[0033] As a preferred embodiment, the nut sleeve 64 includes a first connecting segment 641 and a second connecting segment 642 that are integrally connected, and a limiting step surface is formed at the connection between the first connecting segment 641 and the second connecting segment 642.

[0034] As a preferred embodiment, a first mounting hole 51 is provided in the centering cone 5, and a second connecting section 642 is disposed in the first mounting hole 51, wherein the bottom surface of the first connecting section 641 can fit with the top surface of the centering cone 5.

[0035] In a preferred embodiment, the first connecting section 641 has multiple stepped holes 6411, and the centering cone 5 has multiple threaded holes 52 that correspond one-to-one with and are coaxially connected to the stepped holes 6411. The first connecting section 641 and the centering cone 5 are connected by bolts passing through the stepped holes 6411 and the threaded holes 52.

[0036] As a preferred embodiment, the number of both the stepped hole 6411 and the threaded hole 52 is two, and as follows: Figure 2 As shown, two stepped holes 6411 are symmetrically arranged on both sides of the lead screw body 63.

[0037] In use, the following steps are taken: First, place three support columns 21 on the workbench 1, and place a magnetic suction seat 22 of equal height on each support column 21. At this time, the magnetic suction function is in the off state. Place the gear 7 to be tested on the magnetic suction seat, and pass the centering cone 5 with the ball screw 6 through the gear's inner hole, so that the lower end of the screw body 63 rests on the lower center point 3, and the upper end of the screw body 63 rests on the upper center point 4. Rotate the centering cone 5 to rotate it downwards in the circumferential direction, and at the same time adjust the position of the gear 7 to be tested until the cone surface of the centering cone 5 is close to the hole wall of the gear 7 to be tested. Then, open the magnetic suction seat 22 to fix the gear 7 to be tested. Rotate the centering cone 5 in the opposite direction, remove the centering cone 5 with the ball screw 6, and use the gear measuring instrument probe to scan the gear's inner hole to measure the gear accuracy of the gear 7 to be tested.

[0038] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0039] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0040] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. An auxiliary device for measuring gear accuracy, comprising a worktable (1), characterized in that, The workbench (1) is provided with a gear support (2) to be tested. The gear support (2) to be tested forms an accommodating space. A lower center (3) is vertically arranged in the accommodating space. An upper center (4) is arranged directly above the lower center (3). A centering cone (5) is provided between the lower center (3) and the upper center (4), and a ball screw (6) is inserted inside the centering cone (5). The ball screw (6) can be coaxially connected with the lower center (3) and the upper center (4).

2. The auxiliary device for gear accuracy measurement as described in claim 1, characterized in that, The gear bracket (2) to be tested includes multiple support columns (21) vertically arranged on the workbench (1), and the multiple support columns (21) enclose the accommodating space. A magnetic seat (22) is provided on the top of the support column (21).

3. The auxiliary device for gear accuracy measurement as described in claim 1, characterized in that, The ball screw (6) includes a screw body (63) and a nut sleeve (64) sleeved on the screw body (63); a first positioning hole (61) and a second positioning hole (62) are respectively opened at the center of the upper and lower ends of the screw body (63). The first positioning hole (61) can cooperate with the tapered section of the upper center (4), and the second positioning hole (62) can cooperate with the tapered section of the lower center (3).

4. The auxiliary device for gear accuracy measurement as described in claim 3, characterized in that, The nut sleeve (64) includes a first connecting segment (641) and a second connecting segment (642) that are integrally connected, and a limiting step surface is formed at the connection between the first connecting segment (641) and the second connecting segment (642).

5. The auxiliary device for gear accuracy measurement as described in claim 4, characterized in that, The centering cone (5) has a first mounting hole (51) and the second connecting section (642) is disposed in the first mounting hole (51).

6. The auxiliary device for gear accuracy measurement as described in claim 4, characterized in that, The first connecting section (641) has multiple stepped holes (6411), and the centering cone (5) has multiple threaded holes (52) that correspond one-to-one with the stepped holes (6411) and are coaxially connected.

7. The auxiliary device for gear accuracy measurement as described in claim 6, characterized in that, The number of stepped holes (6411) and threaded holes (52) are both two.

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