Limiting tool and bearing test system thereof

Abstract

This invention belongs to the field of bearings and discloses a limiting fixture and its bearing testing system. The limiting fixture includes a mounting link and a bearing swing arm; the mounting link has a mounting end and a connecting end arranged opposite to each other, the mounting end being used to mount onto a bearing test bench; one end of the bearing swing arm is rotatably mounted to the connecting end about an axis extending in a first direction, and the other end is provided with a bearing portion, the bearing portion being used to support a drive motor. In the limiting fixture provided by this invention, the mounting link and the bearing swing arm together form a two-link structure, so that the test bearing and the bearing test bench can only swing in a certain direction of rotation provided by the motor, preventing deformation and over-constraint jamming when a load is applied. The use of a link structure for bearing control controls the rotating parts to move within one rotation direction, achieving swinging and preventing vibration deformation and jamming. The structure is simple.

Description

Technical Field

[0001] This invention relates to the field of bearing technology, and in particular to a limiting tool and its bearing testing system. Background Technology

[0002] Currently, all bearing test benches require the design of limiting fixtures to constrain single or multiple degrees of freedom, ensuring that the test bench can perform loading tests according to different load combinations.

[0003] Most limit fixtures have complex structural designs, complex controls, are difficult to install, have low operational reliability, high manufacturing and maintenance costs, and affect their service life. Summary of the Invention

[0004] The main objective of this invention is to provide a limiting fixture and its bearing testing system, aiming to solve the problem of complex structure of the limiting fixture.

[0005] To achieve the above objectives, the present invention provides a limiting fixture, comprising: The mounting rod has a mounting end and a connecting end arranged opposite to each other, the mounting end being used for mounting to a bearing test bench; and... The support arm has one end rotatably mounted to the connecting end about an axis extending in a first direction, and the other end is provided with a support part for supporting the drive motor.

[0006] Optionally, the load-bearing swing arm includes: The swing arm body, one end of which is rotatably mounted to the connecting end about an axis extending in a first direction; and, A support base extends along a second direction, and an installation structure is provided between the support base and the swing arm body. The installation structure is used to install the support base onto the swing arm body, and the support base is used to support the drive motor. The second direction is perpendicular to the first direction.

[0007] Optionally, the mounting structure includes a spherical bearing, the bearing bore of which extends along the first direction, wherein one of the swing arm body and the bearing seat is mounted on the inner ring of the spherical bearing, and the other is mounted on the outer ring of the spherical bearing.

[0008] Optionally, two joint bearings are provided, and the two joint bearings are spaced apart along the second direction.

[0009] Optionally, the swing arm body includes a main body section and two support rod sections disposed at one end of the main body section. The main body section is installed to the connecting end, and the bearing seat is installed on the two support rod sections.

[0010] Optionally, two mounting structures are provided; The two support rod segments correspond to the two installation structure settings.

[0011] Optionally, a positioning structure is further formed between the support and the swing arm body, the positioning structure being used to position the support on the swing arm body.

[0012] Optionally, the positioning structure includes a positioning protrusion and a mating groove that cooperate with each other. The positioning protrusion extends into the mating groove. Both the positioning protrusion and the mating groove extend along the second direction. One of the positioning protrusion and the mating groove is located on the end face of the bearing seat facing the swing arm body, and the other is located on the end face of the swing arm body facing the bearing seat. The mounting structure is located between the positioning protrusion and the mating groove.

[0013] Optionally, the connecting end is provided with a through hole extending along the first direction; A connecting hole is provided on one end of the load-bearing swing arm near the mounting link; The limiting fixture also includes a mounting bearing and a connecting pin. The mounting bearing is fixedly installed on one of the through hole or the connecting hole, and one end of the connecting pin is fixedly installed on the other of the through hole or the connecting hole, while the other end is rotatably installed inside the mounting bearing.

[0014] The present invention also provides a bearing testing system, characterized in that it comprises: A bearing test bench is used to support and test bearings, and one end of the bearing test bench in the first direction forms a test end; According to any one of the above-described limiting fixtures, the mounting end of the mounting link is mounted on the test end, and the bearing swing arm is used to carry the drive motor to apply a load to the test bearing.

[0015] This invention provides a limiting fixture in which the mounting link and the bearing swing arm together form a two-link structure. After the mounting link is fixed to the bearing test bench at its mounting end, the bearing swing arm can only rotate around its axis in the first direction. An external drive motor is mounted on the bearing portion of the bearing swing arm, and then the drive motor can be externally connected to the test bearing. The axis of the drive motor also extends along the first direction. Since the positions of the test bearing and the bearing test bench are relatively fixed, the test bearing and the bearing test bench can only oscillate in the rotation direction provided by the motor, preventing deformation and over-constraint jamming under load. Furthermore, the use of only a link structure for load bearing makes the structure simple and reliable. Controlling the rotating component to move within a single rotation direction achieves oscillation, enabling micro-movement within a spatial range, preventing vibration deformation and jamming. It is easy to manufacture, highly reliable, and easy to maintain. Attached Figure Description

[0016] Figure 1 This is a front view schematic diagram of the limiting tooling provided in the embodiment of the present invention; Figure 2 yes Figure 1 A frontal sectional view of the middle limiting fixture; Figure 3 A three-dimensional structural schematic diagram of the bearing testing system provided in the embodiment of the present invention.

[0017] Explanation of icon numbers: 100. Limiting fixture; 200. Bearing test bench; 1. Mounting link; 2. Bearing swing arm; 21. Swing arm body; 22. Bearing seat; 23. Spherical bearing; 24. Positioning convex strip.

[0018] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0020] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0021] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0022] Currently, all bearing test benches require the design of limiting fixtures to constrain single or multiple degrees of freedom, ensuring that the test bench can perform loading tests according to different load combinations.

[0023] Most limit fixtures have complex structural designs, complex controls, are difficult to install, have low operational reliability, high manufacturing and maintenance costs, and affect their service life.

[0024] Please see Figure 1 The present invention provides a limiting fixture 100, including a mounting link 1 and a bearing swing arm 2; the mounting link 1 has a mounting end and a connecting end arranged opposite to each other, the mounting end being used to mount to a bearing test bench; one end of the bearing swing arm 2 is rotatably mounted to the connecting end about an axis extending in a first direction, and the other end is provided with a bearing part, the bearing part being used to support a drive motor.

[0025] In the limiting fixture 100 provided by the present invention, the mounting link 1 and the bearing swing arm 2 together form a two-link structure, such that after the mounting link 1 is fixed on the bearing test bench at the mounting end, the bearing swing arm 2 can only rotate around the axis of the first direction. An external drive motor is installed on the bearing part of the bearing swing arm, and then the drive motor can be externally connected to the test bearing. The axis of the drive motor also extends along the first direction. Since the position between the test bearing and the bearing test bench is relatively fixed, the test bearing and the bearing test bench can only swing in a certain direction of rotation provided by the motor, preventing deformation and over-constraint jamming when a load is applied. At the same time, the bearing is supported by only a link structure, which is simple and reliable. The rotating parts are controlled to move within one rotation direction to achieve swinging, and micro-movement is achieved within the spatial range to prevent vibration deformation and jamming. The structure is simple, easy to process, highly reliable, and easy to maintain.

[0026] Furthermore, the supporting swing arm 2 includes a swing arm body 21 and a support base 22; one end of the swing arm body 21 is rotatably mounted to the connecting end about an axis extending in a first direction; the support base 22 extends along a second direction, and an installation structure is provided between the support base 22 and the swing arm body 21, the installation structure being used to install the support base 22 onto the swing arm body 21, the support base 22 being used to support the motor; wherein, the second direction is perpendicular to the first direction. In this embodiment, one end of the supporting swing arm 2 is used to support the drive motor. To facilitate the placement of the drive motor, the supporting swing arm 2 includes a swing arm body 21 and a support base 22, with the support base 22 supporting the motor. Simultaneously, this facilitates the differentiation and separate maintenance and installation of both ends of the supporting swing arm 2.

[0027] In this embodiment, the support base 22 extends along the second direction, which facilitates the layout of the drive motor on the support base 22.

[0028] Furthermore, the mounting structure includes a spherical bearing 23, the bearing bore of which extends along the first direction. One of the swing arm body 21 and the bearing seat 22 is mounted on the inner ring of the spherical bearing 23, and the other is mounted on the outer ring of the spherical bearing 23. In this embodiment, the bearing swing arm 2 is used to support the drive motor. During the operation of the drive motor, a reverse force is generated. The swing arm body 21 and the bearing seat 22 are mounted through the spherical bearing 23, allowing the bearing seat 22 to swing relative to the swing arm body 21 within a certain angle. This facilitates the movement of the mounting link 1 and the bearing swing arm 2 within a micro-motion range, avoiding the problem of excessive fixing torque at both ends of the double-link structure formed by the mounting link 1 and the bearing swing arm 2, which would prevent movement.

[0029] Specifically, in this embodiment, two spherical bearings 23 are provided, and the two spherical bearings are spaced apart along the second direction. In this embodiment, the support seat 22 extends along the second direction and is installed on the swing arm body 21. In order to avoid the support seat 22 from rotating excessively and forming a de facto three-bar structure, two spherical bearings 23 are provided, so that the support seat 22 is fixed in the second direction, preventing the support seat 22 from rotating. At the same time, since spherical bearings are used, the normal micro-movement of the support seat 22 is not affected.

[0030] In addition, the swing arm body 21 includes a main body segment and two support rod segments disposed at one end of the main body segment. The main body segment is installed to the connecting end, and the bearing seat 22 is installed on the two support rod segments. In this embodiment, the two support rod segments enable the swing arm body 21 to form a Y-shaped structure, thereby improving the structural strength of the swing arm body 21. At the same time, it can more stably support the bearing seat 22, avoiding excessive torque caused by single-point bearing and improving the bearing capacity of the bearing seat 22.

[0031] Furthermore, there are two mounting structures; the two support rod segments correspond to the two mounting structure configurations. In this embodiment, since the mounting structure is used to support the swing arm body 21 and the support seat 22, the force on the mounting structure is relatively large. The support rod segments bear the force on the two mounting structures, ensuring the stability of the connection between the swing arm body 21 and the support seat 22.

[0032] In addition, a positioning structure is formed between the support base 22 and the swing arm body 21. The positioning structure is used to position the support base 22 on the swing arm body 21. In this embodiment, the positioning structure facilitates the installation of the support base 22 on the swing arm body 21, avoiding installation deviations between the swing arm body 21 and the support base 22, which could lead to deviations in the force angle of the support swing arm 2, thus preventing the micro-movement of the support swing arm 2.

[0033] It should be noted that the positioning structure can be implemented in various ways. For example, the positioning and installation between the swing arm body 21 and the bearing seat 22 can be achieved by the cooperation of multiple positioning protrusions and multiple positioning grooves.

[0034] Please see Figure 2 Specifically, in this embodiment, the positioning structure includes a positioning protrusion 24 and a mating groove that cooperate with each other. The positioning protrusion 24 extends into the mating groove, and both the positioning protrusion 24 and the mating groove extend along the second direction. One of the positioning protrusion 24 and the mating groove is located on the end face of the bearing seat 22 facing the swing arm body 21, and the other is located on the end face of the swing arm body 21 facing the bearing seat 22. The mounting structure is located between the positioning protrusion and the mating groove. In this embodiment, the positioning protrusion 24 and the mating groove are directly provided on the opposite end faces of the bearing seat 22 and the swing arm body 21 to ensure the installation angle between the swing arm body 21 and the bearing seat 22, avoiding deviations during the initial installation process. At the same time, placing the mounting structure within the positioning structure simplifies the structure, protects the mounting structure, and optimizes the design space.

[0035] On the other hand, the connecting end is provided with a through hole extending along the first direction; the bearing swing arm 2 is provided with a connecting hole at one end near the mounting rod 1; the limiting fixture 100 also includes a mounting bearing and a connecting pin, the mounting bearing being fixedly installed on one of the through hole or the connecting hole, one end of the connecting pin being fixedly installed on the other of the through hole or the connecting hole, and the other end being rotatably installed in the mounting bearing. In this embodiment, the mounting rod 1 and the bearing swing arm 2 are rotatably installed through the mounting bearing and the connecting pin, ensuring the firmness of the connection and facilitating smooth rotation.

[0036] Based on the aforementioned limiting fixture 100, the present invention also provides a bearing testing system, which includes the limiting fixture 100, that is, it has all the technical features of the aforementioned limiting fixture 100, and therefore also has the technical effects brought about by all the aforementioned technical features, which will not be described in detail here.

[0037] Please see Figure 3 The bearing testing system further includes a bearing test bench 200 for supporting the test bearing. One end of the bearing test bench 200 in the first direction forms a test end. The mounting end of the mounting link 1 is mounted on the test end, and the supporting swing arm 2 is used to support the drive motor to apply a load to the test bearing.

[0038] In the bearing testing system provided by this invention, the bearing test bench 200 tests the bearing in a first direction. The mounting link 1 and the bearing swing arm 2 together form a two-bar structure. After the mounting end of the mounting link 1 is fixed on the test end, the bearing swing arm 2 can only rotate around the axis of the first direction. An external drive motor is installed on the bearing part of the bearing swing arm 2, and then the drive motor can be externally connected to the test bearing. The axis of the drive motor also extends along the first direction. Since the position between the test bearing and the bearing test bench is relatively fixed, the test bearing and the bearing test bench can only swing in a certain direction of rotation provided by the motor. This prevents the drive motor from deforming or getting stuck due to over-constraint when a load is applied. At the same time, the bearing is supported by only a link structure, which is simple and reliable. The rotating parts are controlled to move within one direction of rotation to achieve swinging. Micro-movement is achieved within the spatial range to prevent vibration deformation and jamming. The structure is simple, easy to process, highly reliable, and easy to maintain.

[0039] Furthermore, the bearing testing system also includes a hydraulic cylinder, which is mounted on the bearing test bench 200 to apply a load to the bearing transmission cylinder; the bearing swing arm 2 is connected to the bearing transmission cylinder.

[0040] Please see Figure 3 During the application of load by the hydraulic cylinder, the transmission cylinder will move along the negative Z-axis and bend, thereby causing the bearing swing arm 2 to move along the negative Z-axis, causing the drive shaft of the drive motor to tilt in the negative Z-axis direction; while in the X-axis direction, the tilt of the drive motor will simultaneously deform along the negative X-axis direction. At this time, the joint bearings on the mounting link 1 and the bearing swing arm 2 will be eccentric by a certain angle.

[0041] When the specified load is applied, the drive motor drives the reducer to rotate. At this time, the limit fixture 100 forms a reaction force with the direction of rotation to counteract the force of the motor reducer base. Because the cantilever beam undergoes slight spatial vibration in the locked position, the limit fixture 100 can achieve the characteristic of micro-motion, avoiding the deformation of the transmission cylinder and motor caused by rigid fixing, which would lead to jamming.

[0042] Similarly, deformation and jamming can be avoided when the hydraulic cylinder is unloaded.

[0043] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A limiting fixture, characterized in that, include: The mounting rod has a mounting end and a connecting end arranged opposite to each other, the mounting end being used to mount it onto a bearing test bench; as well as, The support swing arm has one end rotatably mounted to the connecting end about an axis extending in a first direction, and the other end is provided with a support part, which is used to support the drive motor; The load-bearing swing arm includes: The swing arm body, one end of which is rotatably mounted to the connecting end about an axis extending in a first direction; and, A support base extends along a second direction, and a mounting structure is provided between the support base and the swing arm body. The mounting structure is used to mount the support base onto the swing arm body, and the support base is used to support the drive motor. The mounting structure includes a spherical bearing, the bearing hole of which extends along a first direction. Of the swing arm body and the support base, one is mounted on the inner ring of the spherical bearing, and the other is mounted on the outer ring of the spherical bearing. Two spherical bearings are provided, and the two spherical bearings are spaced apart along the second direction. Wherein, the second direction is perpendicular to the first direction; a positioning structure is also formed between the bearing seat and the swing arm body, the positioning structure being used to position the bearing seat on the swing arm body.

2. The limiting fixture according to claim 1, characterized in that, The swing arm body includes a main body section and two support rod sections located at one end of the main body section. The main body section is installed to the connecting end, and the bearing seat is installed on the two support rod sections.

3. The limiting fixture according to claim 2, characterized in that, The mounting structure is provided in two parts; The two support rod segments correspond to the two installation structure settings.

4. The limiting fixture according to claim 1, characterized in that, The positioning structure includes a positioning protrusion and a mating groove that cooperate with each other. The positioning protrusion extends into the mating groove. Both the positioning protrusion and the mating groove extend along the second direction. One of the positioning protrusion and the mating groove is located on the end face of the bearing seat facing the swing arm body, and the other is located on the end face of the swing arm body facing the bearing seat. The mounting structure is located between the positioning protrusion and the mating groove.

5. The limiting fixture according to claim 1, characterized in that, The connecting end is provided with a through hole extending along the first direction; A connecting hole is provided on one end of the load-bearing swing arm near the mounting link; The limiting fixture also includes a mounting bearing and a connecting pin. The mounting bearing is fixedly installed on one of the through hole or the connecting hole, and one end of the connecting pin is fixedly installed on the other of the through hole or the connecting hole, while the other end is rotatably installed inside the mounting bearing.

6. A bearing testing system, characterized in that, include: A bearing test bench is used to support and test bearings, and one end of the bearing test bench in the first direction forms a test end; The limiting fixture according to any one of claims 1 to 5, wherein, The mounting end of the mounting link is mounted on the test end, and the bearing swing arm is used to support the drive motor to apply load to the test bearing.

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