CN219777719U

CN219777719U - Test fixture and test device

Info

Publication number: CN219777719U
Application number: CN202223514836.2U
Authority: CN
Inventors: 马文; 张航; 马洋洋
Original assignee: Continental Automotive Safety System Changchun Co ltd
Current assignee: Continental Automotive Safety System Changchun Co ltd
Priority date: 2022-12-28
Filing date: 2022-12-28
Publication date: 2023-09-29
Anticipated expiration: 2032-12-28

Abstract

The utility model discloses a test fixture and a test device, wherein the test fixture is applied to a magnetic encoder of a wheel speed sensor, and comprises: the base is connected with the driving piece; a main body part mounted on the base; a holding assembly assembled on the main body; the magnetic encoders are sleeved on the clamping assembly, and the clamping assembly adjustably moves on the main body part so as to be adapted to clamp magnetic encoders with different diameters. According to the utility model, the test fixture is adjustable to adapt to testing of magnetic encoders with different sizes, so that the preparation flow of verification test can be greatly simplified, the cost is reduced, the accuracy of a test result can be ensured, and the test efficiency is improved.

Description

Test fixture and test device

Technical Field

The utility model relates to the technical field of product testing, in particular to a testing fixture and a testing device applied to a magnetic encoder in a wheel speed sensor.

Background

To ensure the magnetic encoder quality of the wheel speed sensor, each item requires a magnetic encoder verification test. The magnetic encoder is connected with the motor rotating shaft of the test bench through a clamp, and the rotating speed is about 1000 revolutions per minute. Typically, the magnetic encoder is ring-shaped and the conventional clamp is base-shaped around the ring. Therefore, each time a verification test is currently performed, a fixture is required to be customized to adapt to magnetic encoders with different sizes, and the process preparation flow of the customized fixture is complicated, long in waiting time and high in cost.

Disclosure of Invention

The utility model aims to provide a test fixture and a test device, which can be adjusted to adapt to magnetic encoders of different sizes, and solve the problems of complicated preparation flow and long waiting time of the test fixture.

According to a first aspect of an embodiment of the present utility model, there is provided a test jig applied to a magnetic encoder of a wheel speed sensor, the test jig including:

the base is connected with the driving piece;

a main body part mounted on the base;

a holding assembly assembled on the main body;

the magnetic encoders are sleeved on the clamping assembly, and the clamping assembly adjustably moves on the main body part so as to be adapted to clamp magnetic encoders with different diameters.

The test fixture is further improved in that the base comprises a mounting platform, a first mounting part and a second mounting part, the first mounting part is arranged on the mounting platform, the second mounting part is arranged on the bottom surface of the mounting platform, the base is assembled with the main body part through the first mounting part, and the base is assembled with the driving piece through the second mounting part.

The utility model further improves the test fixture, wherein the clamping assembly comprises a plurality of clamping claws, and the upper surface of each clamping claw is arranged in a step shape; wherein a plurality of the claws are distributed and arranged and can be simultaneously moved close to or withdrawn from the center of the main body part in an adjustable manner.

The testing fixture is further improved in that the clamping assembly further comprises a large bevel gear arranged in the main body part, a plane thread is arranged on the back surface of the large bevel gear, racks matched with the plane thread are arranged on the bottom surface of the clamping jaw, and the clamping jaws are adjusted to simultaneously approach or withdraw from the center of the main body part by adjusting the rotation of the large bevel gear.

The test fixture is further improved in that the clamping assembly further comprises a small bevel gear arranged in the main body part, the small bevel gear is meshed with the large bevel gear in a matched mode, and the side wall of the main body part is provided with an adjusting hole corresponding to the small bevel gear.

The utility model further improves the testing clamp in that the number of the clamping claws is three, and the main body part is correspondingly provided with three slide ways for accommodating the three clamping claws.

The test fixture is further improved in that the included angles between two adjacent slide ways are equal.

A further improvement of the test fixture of the present utility model is that the stepped structure of the upper surface of the jaws extends beyond the slideway.

The test fixture is further improved in that the clamping jaws are made of steel materials, and the main body portion is made of aluminum materials.

According to a second aspect of embodiments of the present utility model, there is provided a test apparatus comprising a test bench, a driving member provided on the test bench, and a test fixture as claimed in any one of the above, the driving member being connected to a base of the test fixture.

According to the test fixture and the test device provided by the utility model, the test fixture is adjustable to adapt to testing of magnetic encoders with different sizes, so that the preparation flow of verification test can be greatly simplified, the cost is reduced, the accuracy of a test result can be ensured, and the test efficiency is improved.

Drawings

The utility model is described in detail below via exemplary embodiments with reference to the attached drawing figures, wherein:

FIG. 1 is a schematic diagram of a test fixture according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram showing a test fixture equipped with a magnetic encoder according to an embodiment of the present utility model;

FIG. 3 is a schematic view showing a structure of a base in a test fixture according to an embodiment of the present utility model;

fig. 4 shows a schematic structural diagram of a claw in a test fixture according to an embodiment of the utility model.

The figures are merely schematic and not necessarily to scale, and they show only those parts which are necessary in order to elucidate the utility model, other parts may be omitted or merely mentioned. That is, the present utility model may include other components in addition to those shown in the drawings.

Detailed Description

Further advantages and effects of the present utility model will become apparent to those skilled in the art from the disclosure of the present specification, by describing the embodiments of the present utility model with specific examples. While the description of the utility model will be described in connection with the preferred embodiments, it is not intended to limit the inventive features to the implementation. Rather, the purpose of the utility model described in connection with the embodiments is to cover other alternatives or modifications, which may be extended by the claims based on the utility model. The following description contains many specific details for the purpose of providing a thorough understanding of the present utility model. The utility model may be practiced without these specific details. Furthermore, some specific details are omitted from the description in order to avoid obscuring the utility model. It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

It should be noted that in this specification, like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present embodiment, it should be noted that, the azimuth or positional relationship indicated by the terms "upper", "inner", etc. are based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship that the inventive product is conventionally put in use, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present utility model.

The terms "first," "second," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.

In the description of the present embodiment, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present embodiment can be understood in a specific case by those of ordinary skill in the art.

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings.

FIG. 1 is a schematic diagram of a test fixture according to an embodiment of the present utility model; fig. 2 is a schematic structural diagram of a test fixture equipped with a magnetic encoder according to an embodiment of the present utility model. Referring to fig. 1 and 2, the test fixture 10 of the embodiment of the present utility model is applied to a magnetic encoder 20 of a wheel speed sensor, that is, for assisting in testing the quality reliability of the magnetic encoder 20, and can be used for clamping the magnetic encoder 20 with a diameter of 40mm to 120 mm. The utility model can be set to be adjustable through the test fixture 10 to adapt to testing of magnetic encoders 20 with different sizes, thereby greatly simplifying the preparation flow of verification test, reducing the cost, ensuring the accuracy of test results and improving the test efficiency.

The test fixture 10 includes a base 1, a body 2, and a clamping assembly 3. The base 1 is used for being connected between a main body 2 and a driving piece (not shown) on a test bench (not shown), the clamping assembly 3 is assembled on the main body 2, the main body 2 is installed on the base 1, the lower surface of the base 1 is connected with the driving piece, the driving piece is a driving motor, and a motor shaft of the driving motor is connected with the base 1. Wherein, the magnetic encoder 20 is sleeved on the clamping component 3, and the clamping component 3 can move on the main body part 2 in an adjustable way so as to adapt to clamping of the magnetic encoders 20 with different diameters.

In one embodiment, as shown in fig. 3, the base 1 includes a mounting platform 11, a first mounting portion 12 provided on the mounting platform 11, and a second mounting portion (not shown) provided on a bottom surface of the mounting platform 11. Wherein the base 1 is assembled with the main body 2 through the first mounting portion 12, and the base 1 is assembled with the driving member through the second mounting portion.

In this embodiment, the first mounting portion 12 is a plurality of connection holes provided at the peripheral side edge of the mounting platform 11, and the plurality of connection holes are fixedly connected to the base 1 and the main body 2 by fitting screws. The center of the upper surface of the mounting platform 11 is provided with a protruding block 13, the protruding block 13 is provided with a third mounting part 14, the third mounting part 14 is provided with a plurality of threaded holes on the protruding block 13, and the plurality of threaded holes are matched with screws to be fixedly connected with a large bevel gear.

As shown in fig. 1, 2 and 4, the clamping assembly 3 includes a plurality of claws 31, and an upper surface of each claw 31 is configured to be stepped, so that the claws 31 can meet clamping requirements of magnetic encoders 20 with different sizes. The stepped structure on the claw 31 is arranged to be gradually lowered in the direction of the center of the main body 2 toward the edge. Wherein, a plurality of claws 31 are distributed and arranged and can be adjusted to approach or withdraw toward the center of the main body 2 at the same time. Specifically, the main body 2 is cylindrical, the magnetic encoder 20 is circular, the plurality of claws 31 are uniformly distributed in the circular structure, the clamping of the magnetic encoder 20 with different sizes is satisfied through the stepped structure of the upper surfaces of the claws 31, and the plurality of claws 31 are simultaneously close to or withdraw from the center of the main body 2 by adjusting the plurality of claws 31 to finely adjust the clamping force so that the plurality of claws 31 are matched with and clamped with the magnetic encoder 20.

In an embodiment (not shown), the illustrated holding assembly 2 further includes a large bevel gear (not shown) disposed on the main body 2, a planar thread is disposed on the back surface of the large bevel gear, a rack 311 engaged with the planar thread is disposed on the bottom surface of the claw 31, and the plurality of claws 31 are adjusted to approach or withdraw from the center of the main body 2 simultaneously by adjusting the rotation of the large bevel gear. Further, the clamping assembly 2 further comprises a bevel pinion (not shown) arranged in the main body 2, the bevel pinion is engaged with the bevel pinion, the side wall of the main body 2 is provided with an adjusting hole 21 corresponding to the bevel pinion, and the adjusting hole 21 is used for inserting a spanner to pull the bevel pinion to rotate so as to drive the bevel pinion to rotate, so that the movement of the claw 31 is adjusted. The plurality of adjustment holes 21 and bevel pinions may be provided and distributed on the peripheral side of the main body 2.

As shown in fig. 1 and 2, in the embodiment of the present utility model, the number of the claws 31 is three, and three slide ways 22 for accommodating the three claws 31 are correspondingly provided on the main body 2. The included angles between two adjacent slideways 22 are equal, so that three claws 31 are uniformly distributed on the main body 2, and the clamping force on the magnetic encoder 20 is balanced. In this embodiment, the stepped configuration of the upper surface of the pawl 31 extends beyond the slideway 22, so as to facilitate different steps on the pawl 31 for adapting to different sizes of magnetic encoders 20.

In this embodiment, three claws 31 are equally mounted on the flat thread of a large bevel gear, and a small bevel gear is engaged with the large bevel gear. When three claws 31 need to be adjusted, the spanner is inserted into the adjusting hole 21 to be clamped with the small bevel gear, the small bevel gear is rotated after the spanner is pulled to drive the large bevel gear to rotate, and the large bevel gear enables the three claws 31 to approach or withdraw from the center of the main body part 2 through plane threads on the back surface, so that the self-defined clamping magnetic encoder 20 is achieved. Through practical measurement, the magnetic encoder 20 clamped on the three clamping claws 31 can reach the precision that the flatness and the roundness are smaller than 0.10mm, and meets the test requirement.

In the embodiment of the present utility model, the claw 31 is made of steel material so as to satisfy the rigidity of clamping, and the main body 2 is made of aluminum material so as to reduce the overall weight of the test fixture 10, so that the overall weight can be reduced to about 2.5kg or even lighter, thereby being capable of adapting to the torque of the driving member used for the test bench and reducing the pressure of the driving member.

According to still another convenient aspect of the present utility model, there is further provided a testing apparatus (not shown) including a testing table, a driving member disposed on the testing table, and the testing jig 10 according to the above embodiments, wherein the driving member is connected to the base 1 of the testing jig 10, and is capable of driving the base 1 to rotate the testing jig 10 at a high speed. When the verification test of the magnetic encoder 20 is performed, the magnetic encoder 20 needs to be fixed on a test bench with a driving piece through the test clamp 10, and then the driving piece drives the test clamp 10 to drive the magnetic encoder 20 to rotate for data test.

The utility model aims to reduce the cost of verification test of a magnetic encoder 20 applied to a wheel speed sensor, and the test fixture 10 is adjustable to adapt to testing of magnetic encoders 20 with different sizes, so that the test flow is simplified and the test efficiency is improved under the condition of ensuring accurate test results.

While the utility model has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing is a further detailed description of the utility model with reference to specific embodiments, and it is not intended to limit the practice of the utility model to those descriptions. Various changes in form and detail may be made therein by those skilled in the art, including a few simple inferences or alternatives, without departing from the spirit and scope of the present utility model.

Claims

1. A test fixture for a magnetic encoder of a wheel speed sensor, the test fixture comprising:

the base is connected with the driving piece;

a main body part mounted on the base;

a holding assembly assembled on the main body;

2. The test fixture of claim 1, wherein the base comprises a mounting platform, a first mounting portion disposed on the mounting platform, and a second mounting portion disposed on a bottom surface of the mounting platform, the base being assembled with the body portion via the first mounting portion, the base being assembled with the driving member via the second mounting portion.

3. The test fixture of claim 1, wherein the clamping assembly comprises a plurality of jaws, an upper surface of each jaw being configured to be stepped; wherein a plurality of the claws are distributed and arranged and can be simultaneously moved close to or withdrawn from the center of the main body part in an adjustable manner.

4. A test fixture as claimed in claim 3, wherein the clamping assembly further comprises a large bevel gear disposed in the main body portion, a planar thread is disposed on a back surface of the large bevel gear, a rack engaged with the planar thread is disposed on a bottom surface of the claw, and the plurality of claws are adjusted to approach or withdraw toward a center of the main body portion simultaneously by adjusting rotation of the large bevel gear.

5. The test fixture of claim 4, wherein the clamping assembly further comprises a bevel pinion disposed within the main body portion, the bevel pinion matingly engaging the bevel macroplate, and wherein a sidewall of the main body portion is provided with an adjustment aperture corresponding to the bevel pinion.

6. The test fixture of claim 4, wherein the number of the clamping jaws is three, and three sliding ways for accommodating the three clamping jaws are correspondingly arranged on the main body part.

7. The test fixture of claim 6, wherein an included angle between two adjacent slides is equal.

8. The test fixture of claim 6, wherein the stepped configuration of the upper surface of the jaws extends beyond the ramp.

9. A test fixture as claimed in claim 3, wherein the jaws are formed of a steel material and the body portion is formed of an aluminum material.

10. A test apparatus comprising a test bench, a drive member disposed on the test bench, and a test fixture as claimed in any one of claims 1 to 9, the drive member being connected to a base of the test fixture.