Bearing retainer stretching tool

Abstract

The utility model discloses a bearing retainer stretching tool, and belongs to the technical field related to bearing retainer testing. Comprising a testing machine upper part mounting seat, a testing machine lower part mounting seat, a stretching tool upper film fixed on the testing machine upper part mounting seat by adopting a bolt, and a stretching tool lower film fixed on the testing machine lower part mounting seat by adopting a bolt, the upper half-moon plate and the lower half-moon plate are respectively arranged on the stretching tool upper film and the stretching tool lower film through reamed bolts, and the upper half-moon plate and the lower half-moon plate are matched with each other and then are attached to the inner surface of the bearing retainer to be tested; the upper half-moon plate and the lower half-moon plate which are matched with each other are adopted to be completely attached to the inner surface of the bearing retainer to be tested, and different upper half-moon plates and lower half-moon plates which are matched with the inner surface of the bearing retainer to be tested can be replaced according to needs, so that the reliability of the bearing retainer in the testing process is ensured, and deformation is avoided; and the reliability of the tensile property test of the bearing retainer can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field related to the test of bearing cages, in particular to a stretching tooling for bearing cages. Background Art

[0002] With the development of new energy vehicles, new energy vehicles have higher requirements for the high-temperature and high-speed application conditions of the bearings of drive motors. In the rapid speed change condition of EV motors, the impact force generated by rolling elements and cages causes large surface stress or internal normal stress on the surface of cage pocket holes and inside the cross beams, which easily leads to the fracture of cages. Therefore, during the design and manufacturing process, it is necessary to test the tensile strength of cages for improvement. At present, during the cage stretching test, two hooked ends are inserted into the ball pocket holes of the cage. During the stretching process, the cage is likely to slip off from the hooked ends, resulting in test failure.

[0003] For example, in the technical solution disclosed in Chinese Patent CN219391613U, it includes a lower fixing seat and an upper stretching seat. Positioning columns are connected to the upper end of the lower fixing seat and the bottom end of the upper stretching seat. Threads are machined on the outer sides of the positioning columns. Two nuts for fixing are screwed on the outer sides of the positioning columns. A positioning block for supporting the inner side of the cage is arranged between the two nuts. A connection hole is machined in the middle of the positioning block. The positioning block is sleeved on the positioning column through the connection hole. An arc surface adapted to the inner ring of the cage is arranged on the surface of the positioning block. However, it still has the problem that during the stretching process, the cage is likely to slip off from the hooked ends or has a large deformation, which affects the accuracy of the tensile test and leads to test failure. Content of the Utility Model

[0004] The utility model provides a stretching tooling for bearing cages, aiming to solve the above technical defects.

[0005] The specific technical solution provided by the utility model is as follows:

[0006] A stretching tooling for bearing cages provided by the utility model includes an upper mounting seat of a testing machine and a lower mounting seat of the testing machine, an upper film of the stretching tooling fixed on the upper mounting seat of the testing machine by a dowel pin, a lower film of the stretching tooling fixed on the lower mounting seat of the testing machine by a dowel pin, an upper semi-lunar plate and a lower semi-lunar plate respectively installed on the upper film of the stretching tooling and the lower film of the stretching tooling by precision bolts. Among them, after the upper semi-lunar plate and the lower semi-lunar plate cooperate with each other, they are mutually attached to the inner surface of the bearing cage to be tested.

[0007] Optionally, positioning pin holes that cooperate with each other are arranged on the upper semi-lunar plate and the upper film of the stretching tooling, and an angular positioning dowel pin is arranged in the positioning pin holes.

[0008] Optionally, a lock nut is provided at the upper end of the upper film of the stretching tooling. The lock nut is located between the upper film of the stretching tooling and the upper mounting seat of the testing machine, and is used to lock the upper film of the stretching tooling and the upper mounting seat of the testing machine.

[0009] Optionally, a lock nut is provided at the lower end of the lower film of the stretching tooling. The lock nut is located between the lower film of the stretching tooling and the lower mounting seat of the testing machine, and is used to lock the lower film of the stretching tooling and the lower mounting seat of the testing machine.

[0010] Optionally, two of the hinge bolts are used to install the upper semi-circular plate on the upper film of the stretching tooling, and two of the hinge bolts are used to install the lower semi-circular plate on the lower film of the stretching tooling. After the upper semi-circular plate and the lower semi-circular plate are spliced together, they form a circular structure.

[0011] The utility model has the following beneficial technical effects:

[0012] The embodiment of the utility model provides a stretching tooling for a bearing cage, which includes an upper mounting seat and a lower mounting seat of a testing machine, an upper film of the stretching tooling fixed on the upper mounting seat of the testing machine by a pin, a lower film of the stretching tooling fixed on the lower mounting seat of the testing machine by a pin, an upper semi-circular plate and a lower semi-circular plate respectively installed on the upper film and the lower film of the stretching tooling by hinge bolts. Among them, after the upper semi-circular plate and the lower semi-circular plate cooperate with each other, they are mutually attached to the inner surface of the bearing cage to be tested. Two mutually cooperating upper semi-circular plates and lower semi-circular plates are completely attached to the inner surface of the bearing cage to be tested, and different upper semi-circular plates and lower semi-circular plates that cooperate with the inner surface of the bearing cage to be tested can be replaced according to needs, ensuring the reliability during the testing process of the bearing cage and avoiding deformation, and realizing the reliability of the stretching performance test of the bearing cage. Description of the Drawings

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0014] Figure 1 It is a schematic structural diagram of a stretching tooling for a bearing cage according to an embodiment of the present utility model;

[0015] Figure 2 For the embodiment of the present utility model Figure 1 Partial enlarged schematic diagram of part I;

[0016] Figure 3 Schematic diagram of the cooperation between the upper film and the lower film of the stretching tooling in the embodiment of the present utility model;

[0017] Figure 4 Schematic diagram of the structure of the upper film of the stretching tooling in the embodiment of the present utility model;

[0018] Figure 5 Schematic diagram of the structure of the taper bolt in the embodiment of the present utility model;

[0019] Figure 6 Schematic diagram of the structure of the angle positioning pin in the embodiment of the present utility model. Specific embodiments

[0020] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0021] The following will be combined with Figures 1 to 6 A stretching tooling for a bearing cage in the embodiment of the present utility model will be described in detail.

[0022] Referring to Figures 1 to 6 as shown, a stretching tooling for a bearing cage provided by the embodiment of the present utility model includes an upper mounting seat 1 of a testing machine and a lower mounting seat 2 of the testing machine, an upper film 4 of the stretching tooling fixed on the upper mounting seat 1 of the testing machine by a pin 3, a lower film 5 of the stretching tooling fixed on the lower mounting seat 2 of the testing machine by a pin 3, upper and lower half-moons 7 and 8 respectively mounted on the upper film 4 and the lower film 5 of the stretching tooling by a taper bolt 6. Among them, after the upper and lower half-moons 7 and 8 cooperate with each other, they are in mutual contact with the inner surface of the bearing cage 12 to be tested. During the testing process, two mutually cooperating upper and lower half-moons are in complete contact with the inner surface of the bearing cage to be tested, and different upper and lower half-moons that cooperate with the inner surface of the bearing cage to be tested can be replaced as needed, ensuring that the inner surface of the bearing cage is in contact with the upper and lower half-moons during the testing process, thereby ensuring the reliability of the bearing cage during the testing process and avoiding deformation of the bearing cage, and realizing the reliability of the stretching performance test of the bearing cage.

[0023] Referring to Figure 1 、 Figure 2 、 Figure 3 and Figure 6As shown in the figure, positioning pin holes 9 that cooperate with each other are provided on the upper meniscus 7 and the film 4 on the stretching tooling. An angular positioning pin 10 is provided in the positioning pin hole 9. A locking round nut 11 is provided at the upper end of the film 4 on the stretching tooling. The locking round nut 11 is located between the film 4 on the stretching tooling and the upper mounting seat 1 of the testing machine. The locking round nut 11 is used to lock the film 4 on the stretching tooling and the upper mounting seat 1 of the testing machine. After connecting the film 4 on the stretching tooling and the upper mounting seat 1 of the testing machine with the pin 3, by tightening the locking round nut 11, the film 4 on the stretching tooling and the upper mounting seat 1 of the testing machine can be locked with each other to avoid shaking during the testing process.

[0024] Reference Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown in the figure, a locking round nut 11 is also provided at the lower end of the lower film 5 of the stretching tooling. The locking round nut 11 is located between the lower film 5 of the stretching tooling and the lower mounting seat 2 of the testing machine. The locking round nut 11 is used to lock the lower film 5 of the stretching tooling and the lower mounting seat 2 of the testing machine. After connecting the lower film 5 of the stretching tooling and the lower mounting seat 2 of the testing machine with the pin 3, by tightening the locking round nut 11, the lower film 5 of the stretching tooling and the lower mounting seat 2 of the testing machine can be locked with each other to avoid shaking during the testing process. The upper meniscus 7 is installed on the film 4 of the stretching tooling with 2 precision bolts 6, and the lower meniscus 8 is installed on the lower film 5 of the stretching tooling with 2 precision bolts 6. After the upper meniscus 7 and the lower meniscus 8 are spliced together, they form a circular structure that cooperates with the inner surface of the bearing cage to be tested.

[0025] An embodiment of the present utility model provides a stretching tooling for a bearing cage, which includes an upper mounting seat and a lower mounting seat of a testing machine, a film on the stretching tooling fixed on the upper mounting seat of the testing machine by a pin, a lower film on the stretching tooling fixed on the lower mounting seat of the testing machine by a pin, an upper meniscus and a lower meniscus respectively installed on the film on the stretching tooling and the lower film on the stretching tooling with precision bolts. Among them, after the upper meniscus and the lower meniscus cooperate with each other, they are in full contact with the inner surface of the bearing cage to be tested. By using two upper menisci and lower menisci that cooperate with each other to be in full contact with the inner surface of the bearing cage to be tested, and different upper menisci and lower menisci that cooperate with the inner surface of the bearing cage to be tested can be replaced according to needs, which ensures the reliability during the testing process of the bearing cage and avoids deformation, and can realize the reliability of the stretching performance test of the bearing cage.

[0026] Obviously, those skilled in the art can make various modifications and variations to the embodiments of the present utility model without departing from the spirit and scope of the embodiments of the present utility model. Thus, if these modifications and variations of the embodiments of the present utility model fall within the scope of the claims of the present utility model and their equivalent technologies, the present utility model also intends to include these modifications and variations.

Claims

1. A bearing cage stretching tooling, characterized in that The bearing cage stretching tooling includes an upper mounting seat of the testing machine and a lower mounting seat of the testing machine, an upper film of the stretching tooling fixed on the upper mounting seat of the testing machine by a dowel pin, a lower film of the stretching tooling fixed on the lower mounting seat of the testing machine by a dowel pin, an upper semi-lunar plate and a lower semi-lunar plate respectively installed on the upper film of the stretching tooling and the lower film of the stretching tooling by precision bolts. Among them, after the upper semi-lunar plate and the lower semi-lunar plate cooperate with each other, they are mutually attached to the inner surface of the bearing cage to be tested.

2. The bearing cage stretching tooling according to claim 1, characterized in that, Positioning pin holes that cooperate with each other are provided on the upper semi-lunar plate and the upper film of the stretching tooling, and an angular positioning dowel pin is arranged in the positioning pin holes.

3. The bearing cage stretching tooling according to claim 1, characterized in that, A locking round nut is arranged at the upper end of the upper film of the stretching tooling. The locking round nut is located between the upper film of the stretching tooling and the upper mounting seat of the testing machine, and the locking round nut is used to lock between the upper film of the stretching tooling and the upper mounting seat of the testing machine.

4. The bearing cage stretching tooling according to claim 1, wherein A locking round nut is arranged at the lower end of the lower film of the stretching tooling. The locking round nut is located between the lower film of the stretching tooling and the lower mounting seat of the testing machine, and the locking round nut is used to lock between the lower film of the stretching tooling and the lower mounting seat of the testing machine.

5. The bearing cage stretching tooling according to claim 1, characterized in that, The upper semi-lunar plate is installed on the upper film of the stretching tooling by 2 of the precision bolts, and the lower semi-lunar plate is installed on the lower film of the stretching tooling by 2 of the precision bolts. After the upper semi-lunar plate and the lower semi-lunar plate are spliced with each other, they form a circular structure.

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