Hinge bearing running-in experiment table
By using a combination of permanent magnets and coils in the hinge bearing running-in test bench, the heat and friction problems caused by motor drive in a vacuum environment were solved, achieving stable motion control without motor drive, improving the service life of the equipment and reducing maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LUOYANG BEARING RES INST CO LTD
- Filing Date
- 2025-05-27
- Publication Date
- 2026-04-21
AI Technical Summary
Traditional hinge bearing running-in test benches suffer from heat generation and mechanical friction when driven by a motor in a vacuum environment, which affects the service life and maintenance costs of the equipment.
A hinge bearing running-in test bench is driven in a vacuum environment by a combination of permanent magnets and coils. The movement of the swing link is controlled by changing the direction of the coil current, avoiding heat and mechanical friction, and reciprocating motion is achieved by the interaction of magnetic field and current.
It has improved the service life of the equipment, reduced maintenance costs, ensured the stability and safety of the experimental process, and achieved precise motion control.
Smart Images
Figure CN224152032U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of equipment design, specifically a hinge bearing running-in test bench. Background Technology
[0002] Hinge bearings, as important mechanical components, are widely used in various devices requiring flexible rotation and connection, such as lens adjustment mechanisms. The hinge bearings used in lens adjustment mechanisms require long-term stable operation and a long service life; therefore, the lifespan of the hinge bearing directly affects the normal operation of the lens adjustment mechanism. In the manufacturing process of hinge bearings, a running-in test is an essential step. The purpose of the running-in test is to simulate actual working conditions to test the lifespan and stability of the hinge bearing.
[0003] Traditional hinge bearing assembly life testing benches mostly use motor drives. However, in a vacuum environment, motor drives have many drawbacks. On the one hand, the motor generates heat during operation, which may damage the motor after prolonged use, thus affecting the continuity and accuracy of the experiment. On the other hand, the mechanical friction of the motor in a vacuum environment accelerates the wear of components, not only shortening the equipment's lifespan but also increasing maintenance costs and labor input. Utility Model Content
[0004] To address the heat and mechanical friction generated during operation of existing running-in test benches in a vacuum environment using motor drive, this invention provides a hinge bearing running-in test bench. This bench can operate normally in a vacuum environment without the need for motor drive, avoiding heat and mechanical friction, thus improving the service life of the equipment and reducing maintenance costs.
[0005] To achieve the above objectives, the specific solution adopted by this utility model is as follows: a hinge bearing running-in test bench, including a lower support for supporting the hinge bearing assembly and a base disposed at the bottom of the lower support. The hinge bearing assembly is provided with a swing link at the top for driving its synchronous movement. The top of the swing link is provided with a bracket, and a working cavity with an opening facing the horizontal direction is formed inside the bracket. Permanent magnets are provided at the top and bottom of the working cavity, and a magnetic field region is formed between the permanent magnets at the top and bottom. A support plate is provided in the magnetic field region. A coil connected to a power source is wound on the part of the support plate located in the magnetic field region. The end of the support plate away from the coil is disposed on the base. A control component for changing the direction of the coil current is provided between the coil and the power source.
[0006] As an optimized solution for the aforementioned hinge bearing running-in test bench: the control component is an electrical commutation component, which is a bridge circuit composed of four MOSFETs. The midpoint of the bridge circuit is connected to the coil, and the MOSFETs control the current commutation of the coil.
[0007] As another optimized solution for the aforementioned hinge bearing running-in test bench: the control component includes a decoder and a field-effect transistor; the gate of the field-effect transistor is connected to the control signal of the decoder, the drain of the field-effect transistor is connected to the coil, and the source of the field-effect transistor is grounded.
[0008] As another optimization scheme for the aforementioned hinge bearing running-in test bench: the magnetic poles of the permanent magnet at the top and the permanent magnet at the bottom are opposite.
[0009] As another optimized solution for the aforementioned hinge bearing running-in test bench: a fixed ring is provided on the lower support, and the fixed ring is connected to the swing linkage by a tension spring.
[0010] As another optimized solution for the aforementioned hinge bearing running-in test bench: the base and the lower support are fixedly connected by screws.
[0011] As another optimization of the aforementioned hinge bearing running-in test bench: two limiting blocks are symmetrically provided on the base, and the two limiting blocks are located on both sides of the swing link respectively.
[0012] As another optimization of the aforementioned hinge bearing running-in test bench: the two ends of the swing link are respectively provided with extensions extending toward the base, and both extensions are located between two limiting blocks.
[0013] As another optimized solution for the aforementioned hinge bearing running-in test bench: the extension is provided with a position sensor for controlling the commutation of the coil current, and the position sensor contacts the limiting block to send a signal to control the commutation of the coil current.
[0014] As another optimization of the aforementioned hinge bearing running-in test bench: both the lower support and the swing linkage are equipped with pressure blocks for pressing the hinge bearing assembly.
[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a hinge bearing running-in test bench. The test bench has permanent magnets set at the top and bottom of the working chamber and a support plate with coils wound in the magnetic field area. The reciprocating swing of the swing link is controlled by changing the direction of the current, which avoids the generation of heat and mechanical friction, improves the service life of the equipment, and reduces maintenance costs.
[0016] In this invention, two limiting blocks are stacked on the base, and the two ends of the swing link are provided with extensions. The extensions are located between the two limiting blocks, which effectively prevents the swing link from swinging excessively or deviating from the predetermined trajectory during the movement, thus ensuring the stability and safety of the experimental process.
[0017] In this invention, a position sensor is provided on the extension. When the position sensor contacts the limit block, it sends a signal to control the current reversal of the control coil, which can realize accurate detection of the movement position of the swing link and precise control of the current reversal. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the break-in test bench;
[0019] Figure 2 This is a schematic diagram of coil commutation;
[0020] Reference numerals: 1. Lower support, 2. Base, 3. Swinging link, 301. Extension, 4. Bracket, 5. Working chamber, 6. Permanent magnet, 7. Support plate, 8. Coil, 9. Fixing ring, 10. Tension spring, 11. Limiting block, 12. Position sensor, 13. Pressure block, 14. Screw, 15. Hinge bearing assembly, 16. Magnetic field zone. Detailed Implementation
[0021] The technical solution of the present invention will be further described in detail below with reference to specific embodiments. Parts not described or disclosed in detail in the following embodiments of the present invention should be understood as prior art known or should be known by those skilled in the art.
[0022] Example 1
[0023] like Figure 1 As shown, a hinge bearing running-in test bench includes a lower support 1 for supporting a hinge bearing assembly 15 and a base 2 disposed at the bottom of the lower support 1. The base 2 is the basic support component of the test bench, made of high-strength metal material, with a flat surface and mounting holes to facilitate fixing the lower support 1 to the base 2. The base 2 and the lower support 1 are fixedly connected by screws 14. The lower support 1 has a boss with two arc-shaped grooves, and an upward-opening groove is formed between the two arc-shaped grooves.
[0024] The hinge bearing assembly 15 is provided with a swing link 3 at the top for driving its synchronous movement. The swing link 3 is long and crosses the hinge bearing assembly 15. Both ends of the swing link 3 are provided with extensions 301 extending toward the base 2. The bottom end of the extension 301 is higher than the top end of the lower support 1.
[0025] The top of the swing linkage 3 is equipped with a bracket 4, which has an "N"-shaped cross-section. A working cavity 5 with an opening facing horizontally is formed inside the bracket 4. Permanent magnets 6 are located at both the top and bottom of the working cavity 5, with the magnetic poles of the top and bottom permanent magnets 6 facing opposite directions. Specifically, there are four permanent magnets 6, using relatively large commercially available permanent magnets. Each permanent magnet 6 is 20mm long and 10mm wide. All four permanent magnets 6 are used simultaneously. There are two pairs of permanent magnets 6 at the top and two pairs at the bottom of the working cavity 5, with the magnetic poles of the two pairs facing opposite directions, ensuring that the electromagnetic induction force on both sides of the coil 8 is in the same direction. That is, the magnetic poles of two permanent magnets 6 on the same vertical plane are opposite, while the magnetic poles at the same horizontal height are aligned, with opposite poles arranged adjacently.
[0026] A magnetic field region 16 is formed between the top and bottom permanent magnets 6. A support plate 7, L-shaped, is located within this region. One side of the support plate 7 within the magnetic field region 16 is parallel to the permanent magnet 6. A coil 8, connected to a power source, is wound around the support plate 7 at the location within the magnetic field region 16. This coil 8 has an increased diameter and more turns to enhance the electromagnetic force. The end of the support plate 7 away from the coil 8 is mounted on a base 2. An extension plate parallel to the base 2 is located on the side of the support plate 7 away from the magnetic field region 16. A control component for changing the direction of the current in the coil 8 is located between the coil 8 and the power source.
[0027] The above are the basic embodiments of this utility model. Further improvements, optimizations, and limitations can be made based on the above to obtain the following embodiments:
[0028] Example 2
[0029] This embodiment is an improvement on embodiment 1. Its main structure is the same as that of embodiment 1, but the improvement lies in:
[0030] The control component is an electrical commutation component, which is a bridge circuit composed of four MOSFETs. The midpoint of the bridge circuit is connected to the coil 8, and the MOSFETs control the current commutation of the coil 8.
[0031] Example 3
[0032] This embodiment is an improvement on embodiment 1. Its main structure is the same as that of embodiment 1, but the improvement lies in:
[0033] The control component includes a decoder and a field-effect transistor (FET); the gate of the FET is connected to the control signal of the decoder, the drain of the FET is connected to coil 8, and the source of the FET is grounded. Specifically: Figure 2As shown, coil 8 is switched using a field-effect transistor and a decoder. The decoder controls the on / off state of the field-effect transistor. When the control signal is high, the drain and source of the field-effect transistor are connected, and coil 8 is turned on.
[0034] Example 4
[0035] This embodiment is an improvement on embodiment 1. Its main structure is the same as that of embodiment 1, but the improvement lies in:
[0036] like Figure 1 As shown, the lower support 1 is provided with a fixing ring 9. Specifically, the fixing ring 9 is located in a groove, and the top of the fixing ring 9 is not higher than the top of the boss. The fixing ring 9 is connected to the swing link 3 by a tension spring 10. The end of the tension spring 10 away from the fixing ring 9 is connected to the swing link 3 by a connecting rope. The tension spring 10 provides a restoring force for the swing link 3, ensuring that the swing link 3 can return to its initial position when the magnetic force disappears.
[0037] Both the lower support 1 and the swing link 3 are provided with pressure blocks 13 for pressing the hinge bearing assembly 15. There are four pressure blocks 13, and each pressure block 13 has a semi-circular groove corresponding to the arc groove. Each pressure block 13 is provided with two screws for connecting the upper boss of the lower support 1 and the swing link 3 respectively.
[0038] Example 5
[0039] This embodiment is an improvement on embodiment 1. Its main structure is the same as that of embodiment 1, but the improvement lies in:
[0040] Two limiting blocks 11 are symmetrically arranged on the base 2, and the two limiting blocks 11 are located on both sides of the swing link 3. One of the limiting blocks 11 is fixedly connected to the extension plate. The height of the limiting block 11 is not lower than the height of the protrusion of the lower support 1. The two extensions 301 are located between the two limiting blocks 11, and the bottom end of the extension 301 is not higher than the top end of the limiting block 11.
[0041] The extension 301 is equipped with a position sensor 12 for controlling the commutation of the current in the coil 8. The position sensor 12 contacts the limit block 11 and sends a signal to control the commutation of the current in the coil 8. The position sensor 1215 is a Hall element. When the left Hall element senses its limit, it sends a low-level signal, causing the swing link 32 to move to the right. The left Hall element then returns to a high-level signal. Specifically, the trigger holding circuit holds the low-level signal of the left Hall element until the right Hall element detects the right limit position and sends a low-level signal. This design enables automatic control, ensuring that the swing link 32 reciprocates within a set stroke range, preventing damage to the device due to excessive stroke.
[0042] The working process of the running-in test bench: In the initial state, the swing link 3 is in the middle position, and the tension spring 10 is in its natural extension state. At this time, the coil 8 is not energized, and there is no magnetic field force between the permanent magnet 6 and the coil 8. When the test bench needs to be started, the control component starts working. By changing the current direction of the coil 8, the interaction between the magnetic field and the current causes the support 4 to move. The movement of the support 4 drives the reciprocating motion of the swing link 3, which in turn causes the hinge bearing assembly 15 to start moving synchronously. When the position sensor 12 on the extension 301 of the swing link 3 contacts the limit block 11, the position sensor 12 sends a signal. After receiving the signal, the control component controls the current reversal of the coil 8 according to the preset program or external signal. After the current reversal, the movement direction of the support 4 changes, and the swing link 3 changes its swing direction accordingly. The above process is repeated to achieve stable reciprocating motion. When the test bench needs to be stopped, the control component cuts off the power supply to the coil 8, the tension spring 10 pulls the swing link 3 back to the initial position, and the test bench stops working.
[0043] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A hinged bearing running-in test bench comprising a lower support (1) for supporting a hinged bearing assembly (15) and a base (2) arranged at the bottom of the lower support (1), characterized in that: The hinge bearing assembly (15) is provided with a swing link (3) at the top for driving its synchronous movement. The swing link (3) is provided with a bracket (4) at the top. A working cavity (5) with an opening facing the horizontal direction is formed in the bracket (4). Permanent magnets (6) are provided at the top and bottom of the working cavity (5). A magnetic field region (16) is formed between the permanent magnets (6) at the top and the permanent magnets (6) at the bottom. A support plate (7) is provided in the magnetic field region (16). A coil (8) connected to the power supply is wound on the part of the support plate (7) in the magnetic field region (16). The end of the support plate (7) away from the coil (8) is set on the base (2). A control component for changing the current direction of the coil (8) is provided between the coil (8) and the power supply.
2. A test rig for running-in a hinge bearing as claimed in claim 1, characterized in that: The control component is an electrical commutation component, which is a bridge circuit composed of four MOSFETs. The midpoint of the bridge circuit is connected to the coil (8), and the MOSFETs control the current commutation of the coil (8).
3. A test rig for running-in a hinge bearing as claimed in claim 1, characterized in that: The control component includes a decoder and a field-effect transistor (FET); the gate of the FET is connected to the control signal of the decoder, the drain of the FET is connected to the coil (8), and the source of the FET is grounded.
4. A test rig for running-in a hinge bearing as claimed in claim 1, characterized in that: The permanent magnet (6) at the top has opposite magnetic pole directions to the permanent magnet (6) at the bottom.
5. A test rig for running-in a hinge bearing as claimed in claim 1, characterized in that: The lower support (1) is provided with a fixing ring (9), and the fixing ring (9) is connected to the swing link (3) by a tension spring (10).
6. A test rig for running-in a hinge bearing as claimed in claim 1, characterized in that: The base (2) and the lower support (1) are fixedly connected by screws (14).
7. A test rig for running-in a hinge bearing as claimed in claim 1, characterized in that: Two limiting blocks (11) are symmetrically provided on the base (2), and the two limiting blocks (11) are located on both sides of the swing link (3).
8. A test rig as claimed in claim 7, characterised in that: The swing link (3) has extensions (301) at both ends that extend toward the base (2), and both extensions (301) are located between the two limiting blocks (11).
9. A test rig for running-in a hinge bearing as claimed in claim 8, characterized in that: The extension (301) is provided with a position sensor (12) for controlling the current commutation of the coil (8). The position sensor (12) contacts the limiting block (11) and sends a signal to control the current commutation of the coil (8).
10. A test rig for running-in a hinge bearing as claimed in claim 1, characterized in that: Both the lower support (1) and the swing link (3) are provided with pressure blocks (13) for pressing the hinge bearing assembly (15).