Self-pressure-measuring bearing roller pin

Abstract

The utility model provides a self-pressure-measuring bearing needle roller which comprises a cylindrical bearing needle roller body, a hollow mounting groove is formed in the middle axis position of the bearing needle roller body, the hollow mounting groove is provided with an opening structure on the end face of one side of the bearing needle roller body, and a piezoelectric block is mounted in the hollow mounting groove. The outer side face of the piezoelectric block abuts against the inner edge face of the hollow mounting groove, the piezoelectric block is provided with a wiring end facing the side of the opening structure and used for being in butt joint with a pressure gauge through the wiring end to measure the pressure value of the bearing roller, and the piezoelectric block can convert external pressure into a corresponding piezoelectric signal through the piezoelectric effect. And the bearing needle roller body can be conveniently and quickly butted with an external pressure gauge through the wiring end of the bearing needle roller body, so that the pressure borne by the bearing needle roller body can be conveniently measured, and the technical problem that the bearing pressure is difficult to measure in the structural design of the existing needle roller bearing is effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of bearing equipment, in particular to a self-pressure-testing bearing needle roller. Background Art

[0002] Needle roller bearings are roller bearings with cylindrical rollers or needle rollers. These rollers / needles are thin and long relative to their diameter. Despite the small cross-section of the needle rollers, the bearings still have a high load-bearing capacity. Needle roller bearings are equipped with thin and long rollers (roller diameter D, roller length L, L / D ≥ 2.5, with the ratio generally being 3-10 times), resulting in a compact radial structure. While their inner diameter and load capacity are the same as those of other bearing types, their outer diameter is minimized, making them particularly suitable for support structures with restricted radial mounting dimensions.

[0003] Depending on the application scenario, bearings without inner rings or needle roller and cage assemblies can be selected. In this case, the shaft neck surface and housing hole surface that match the bearing are directly used as the inner and outer rolling surfaces of the bearing. In order to ensure that the load capacity and operating performance are the same as those of bearings with rings, the hardness, processing accuracy and surface quality of the shaft or housing hole raceway surface should be similar to those of the bearing ring raceway. This type of bearing can only withstand radial loads.

[0004] In the practical application of needle roller bearings, it is often necessary to detect the actual load-bearing capacity. However, due to the limitations of the bearing structure itself, it is difficult to measure the load-bearing capacity or the normal pressure.

[0005] In summary, the structural design of existing needle roller bearings has the technical problem of being difficult to measure the bearing pressure. Utility Model Content

[0006] The technical problem to be solved by the utility model is that it is difficult to measure the bearing pressure in the structural design of the existing needle roller bearing.

[0007] In order to solve the above problems, the utility model provides a self-pressure-testing bearing needle roller, including a cylindrical bearing needle roller body, the bearing needle roller body is provided with a hollow mounting groove at the center axis position, the hollow mounting groove is provided with an opening structure on one end face of the bearing needle roller body, a piezoelectric block is installed in the hollow mounting groove, the outer side surface of the piezoelectric block is abutted against the inner edge surface of the hollow mounting groove, and the piezoelectric block is provided with a wiring terminal facing the side of the opening structure, which is used to measure the pressure value of the bearing roller through the wiring terminal connected to the pressure gauge.

[0008] The self-pressure-testing bearing needle roller provided by the utility model has a hollow mounting groove arranged in the needle roller body of the bearing, the hollow mounting groove is located in the center axis position area of ​​the needle roller body, and a piezoelectric block is filled in the hollow mounting groove. The piezoelectric block can convert its external pressure into a corresponding piezoelectric signal through the piezoelectric effect, and can be conveniently and quickly connected to an external pressure gauge through its own terminal, so as to conveniently measure the pressure borne by the bearing needle roller body, thereby effectively solving the technical problem that the structural design of the existing needle roller bearing is difficult to measure the bearing pressure.

[0009] As a preferred solution, the hollow mounting groove is cylindrical and coaxial with the bearing needle roller. The piezoelectric block is also cylindrical, and the terminal is located on the outer end surface of the piezoelectric block. This design further optimizes the structural design of the hollow mounting groove and the piezoelectric block. Both adopt a basic cylindrical structure. The cylindrical piezoelectric block better matches the shape of the bearing needle roller, allowing for more accurate measurement of the radial bearing pressure of the bearing needle roller and minimizing the loss of strength caused by the hollow structure of the needle roller.

[0010] As a preferred solution, the piezoelectric block is a quartz piezoelectric structure. Using quartz piezoelectric as the basic design of the piezoelectric block structure has the advantages of accurate pressure measurement and good durability.

[0011] As a preferred solution, an elastic plug is inserted into the opening of the hollow mounting slot to seal it when not in pressure measurement mode. This design further addresses the electrical components within the needle roller. The elastic plug seals the opening when pressure measurement is not in progress, or when the needle roller bearing is in normal use. This prevents oil, dirt, and other impurities from entering the cavity housing the piezoelectric block, potentially damaging the piezoelectric measurement structure and leading to inaccurate measurement results.

[0012] As a preferred solution, annular retainers are provided at both ends of the needle roller bearing. These retainers are equipped with through-holes that connect to the openings on the needle roller bearing body. This design adapts to the openings on the end faces of the needle roller bearing body. By providing through-holes in the annular retainers at the ends of the needle roller bearing, when docking a piezoelectric block for pressure measurement, simply rotate the through-holes to align with the openings, allowing wiring to connect to a pressure gauge from the outside of the bearing.

[0013] As a preferred solution, the central areas of the two end surfaces of the bearing needle roller body are provided with limiting cones, and the opening structure is located on the end surfaces of the limiting cones. This design optimizes the wiring derivation structure for bearing needle rollers with rotating body-shaped limiting structures at both ends, positioning the opening structure of the hollow mounting slot on the end surfaces of the limiting cones, making wiring more convenient during force measurement.

[0014] As a preferred solution, the terminal is in the shape of a socket provided on the surface of the piezoelectric block. This design optimizes the structural design of the terminal. The terminal is in the shape of a socket, and the structure of the socket facilitates electrical connection with the wiring plug of the pressure gauge. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural diagram of a self-testing pressure bearing needle roller provided by the utility model;

[0016] Figure 2 for Figure 1 Schematic diagram of the exploded structure of the Zhongzi pressure testing bearing needle roller.

[0017] in, Figure 1 、 Figure 2 middle:

[0018] 1. Bearing needle roller body; 2. Hollow mounting groove; 3. Piezoelectric block; 4. Terminal; 5. Opening structure; 6. Elastic plug. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0020] Before explaining the working principle of the present invention in detail, the description of the present invention needs to be further explained: In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "two ends," "one end," "the other end," and the like, indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc. should be understood in a broad sense. For example, "connected" may refer to a fixed connection, a detachable connection, or an integral connection; it may refer to a mechanical connection, a direct connection, an indirect connection via an intermediate medium, or a connection between two components by welding. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model in specific circumstances.

[0022] refer to Figure 1 、 Figure 2 The following examples are described, Figure 1This is a structural diagram of a self-testing pressure bearing needle roller provided by the utility model; Figure 2 for Figure 1 Schematic diagram of the exploded structure of the Zhongzi pressure testing bearing needle roller.

[0023] A self-pressure-testing bearing needle roller provided in this embodiment includes a cylindrical bearing needle roller body 1, and the bearing needle roller body 1 is provided with a hollow mounting groove 2 at the center axis position. The hollow mounting groove 2 is provided with an opening structure 5 on one end face of the bearing needle roller body 1. A piezoelectric block 3 is installed in the hollow mounting groove 2, and the outer side surface of the piezoelectric block 3 is in contact with the inner edge surface of the hollow mounting groove 2. The piezoelectric block 3 is provided with a terminal 4 facing the side of the opening structure 5, which is used to connect to a pressure gauge through the terminal 4 to measure the pressure value of the bearing roller.

[0024] The self-pressure-testing bearing needle provided by the utility model has a hollow mounting groove 2 set in the needle roller body of the bearing, and the hollow mounting groove 2 is located in the central axis position area of ​​the needle roller body. A piezoelectric block 3 is filled in the hollow mounting groove 2. The piezoelectric block 3 can convert its external pressure into a corresponding piezoelectric signal through the piezoelectric effect, and can be conveniently and quickly connected to an external pressure gauge through its own terminal 4, so as to conveniently measure the pressure borne by the bearing needle roller body 1, thereby effectively solving the technical problem that the structural design of the existing needle roller bearing is difficult to measure the bearing pressure.

[0025] In the technical solution provided by this embodiment, the hollow mounting groove 2 is cylindrical and coaxial with the bearing needle roller. The piezoelectric block 3 is also cylindrical, and the terminal 4 is provided on the outer end surface of the piezoelectric block 3. This design further optimizes the structural design of the hollow mounting groove 2 and the piezoelectric block 3. Both adopt a basic cylindrical structure. The cylindrical shape of the piezoelectric block 3 better matches the shape of the bearing needle roller, allowing for more accurate measurement of the radial bearing pressure of the bearing needle roller and minimizing the loss of strength due to the hollow structure of the needle roller.

[0026] In the technical solution provided in this embodiment, the piezoelectric block 3 is a quartz piezoelectric structure. Using quartz piezoelectric as the basic design of the piezoelectric block 3 structure has the advantages of accurate pressure measurement and good durability.

[0027] In the technical solution provided by this embodiment, an elastic plug 6 is inserted into the opening structure 5 of the hollow mounting slot 2 to seal the hollow mounting slot 2 when not in pressure measurement mode. This design further addresses the electrical components within the needle roller. The elastic plug 6 seals the opening structure 5 when pressure measurement is not in progress, or when the needle roller bearing is in normal use. This prevents oil, dirt, and other impurities from entering the cavity containing the piezoelectric block 3, potentially damaging the piezoelectric measurement structure and preventing inaccurate measurement results.

[0028] In the technical solution provided by this embodiment, annular retainers are provided at both ends of the needle roller bearing. These retainers are provided with through-hole structures for connecting to opening structures 5 on the needle roller bearing body 1. This design adapts to the opening structures 5 on the end face of the needle roller bearing body 1. The through-hole structures provided in the annular retainers at the ends of the needle roller bearing allow the pressure gauge to be connected from the outside of the bearing by simply rotating the through-hole structures to align with the opening structures 5 when docking the piezoelectric block 3 for pressure measurement.

[0029] In the technical solution provided in this embodiment, a conical stopper is provided in the center of each end face of the needle roller bearing body 1, with an opening structure 5 located at the end face of the conical stopper. This design, specifically for needle roller bearings with rotating body-shaped stoppers at both ends, optimizes the wiring lead-out structure by positioning the opening structure 5 of the hollow mounting slot 2 at the end face of the conical stopper, further facilitating wiring during force measurement.

[0030] In the technical solution provided by this embodiment, the terminal 4 is in the form of a socket provided on the surface of the piezoelectric block 3. This design optimizes the structural design of the terminal 4. The terminal 4 is in the form of a socket, and the socket structure facilitates electrical connection to the wiring plug of the pressure gauge.

[0031] Although the disclosure is as described above, the scope of protection of the disclosure is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the scope of protection of the utility model.

Claims

1. A self-testing bearing needle roller, comprising a cylindrical bearing needle roller body (1), characterized in that: The bearing needle roller body (1) is provided with a hollow mounting groove (2) at the center axis position, and the hollow mounting groove (2) is provided with an opening structure (5) on one end face of the bearing needle roller body (1). A piezoelectric block (3) is installed in the hollow mounting groove (2), and the outer side surface of the piezoelectric block (3) is in contact with the inner edge surface of the hollow mounting groove (2). The piezoelectric block (3) is provided with a terminal (4) facing the side of the opening structure (5), and is used for connecting a pressure gauge through the terminal (4) to measure the pressure value of the bearing roller.

2. The self-testing bearing needle roller according to claim 1, characterized in that: The hollow mounting groove (2) is cylindrical, the hollow mounting groove (2) is coaxial with the bearing needle, the piezoelectric block (3) is also cylindrical, and the terminal (4) is arranged on the outer end surface of the piezoelectric block (3).

3. The self-testing bearing needle roller according to claim 2, characterized in that: The piezoelectric block (3) is a quartz piezoelectric structure.

4. The self-testing bearing needle roller according to claim 1, characterized in that: An elastic plug (6) is inserted into the opening structure (5) of the hollow installation groove (2) and is used to close the hollow installation groove (2) when not in a pressure measurement state.

5. The self-testing bearing needle roller according to any one of claims 1 to 4, characterized in that: An annular limiting frame is provided at both ends of the bearing needle roller, and the annular limiting frame is provided with a through-hole structure for communicating with the opening structure (5) on the bearing needle roller body (1).

6. The self-testing bearing needle roller according to claim 5, characterized in that: A limiting truncated cone is provided in the central area of ​​both side end surfaces of the bearing needle roller body (1), and the opening structure (5) is located on the end surface of the limiting truncated cone.

7. The self-pressure-testing bearing needle roller according to claim 5, characterized in that: The connection terminal (4) is in the shape of a socket and is arranged on the surface of the piezoelectric block (3).

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