A needle roller bearing with low noise

Abstract

The utility model belongs to the technical field of needle roller bearings, and particularly relates to a needle roller bearing with low noise; comprising an outer ring, which is provided with an inner ring; an adjusting mechanism, which is arranged inside the inner ring, and is used to adjust the preload force applied by the bearing to the rotor; the adjusting mechanism comprises: a clamping ring, which is arranged at the upper and lower ends of the inner ring; a connecting spring, which is arranged between the clamping ring and the inner ring, and there are multiple connecting springs; a mounting frame, which has multiple parts and is arranged on the inner wall of the outer ring by bolt connection; a cylinder, which is arranged on the mounting frame; a connecting plate, which is arranged on the piston rod of the cylinder, and the connecting plate is key-connected with the clamping ring; a sensor, which is arranged on the inner wall of the clamping ring, and is used to measure the pressure and deformation of the clamping ring; a control unit, which is used to receive data from the sensor and adjust the clamping ring to achieve the desired preload force, and the control unit is electrically connected to the cylinder. The utility model provides a needle roller bearing with low noise that can adjust the preload force of the bearing on the shaft and reduce the noise generated.

Description

Technical Field

[0001] The utility model belongs to the technical field of needle roller bearings, and particularly relates to a needle roller bearing with low noise. Background Art

[0002] Needle roller bearings are roller bearings with cylindrical rollers. Relative to their diameter, the rollers are thin and long. Such rollers are called needle rollers. Despite their small cross-section, the bearings still have a high load-bearing capacity. Needle roller bearings are equipped with thin and long rollers, so the radial structure is compact. When the inner diameter size and load capacity are the same as those of other types of bearings, the outer diameter is the smallest, which is particularly suitable for support structures with limited radial installation dimensions.

[0003] The utility model patent with publication number CN217502288U discloses a low-noise needle roller bearing, which belongs to the technical field of needle roller bearings, including a bearing outer ring and a dust cover plate, the dust cover plate is fixedly connected between the bearing outer ring and the bearing inner ring, a plurality of oil guide holes are opened on the dust cover, and the plurality of oil guide holes are threadedly connected with fixing screws, two connecting rods are arranged on the mounting plate, two rollers rotate on the two connecting rods, and the needle roller and the roller contact and rotate relatively, so that the roller effectively shares the rotation load of the needle roller, thereby improving the service life of the needle roller bearing, and the dust cover plate is provided to make the bearing have good dustproofness, the dust cover plate is provided with oil guide holes, and lubricating oil is added to the needle roller through the oil guide holes so that the needle roller has good lubricity, and the oil guide hole is sealed by the fixing screw so that dust does not enter the oil guide hole from the dust cover plate, so that the needle roller has good lubricity and dustproofness.

[0004] Although this technology can add lubricating oil to the needle roller, reduce the wear caused by the rotation of the needle roller, and reduce the noise generated by the needle roller bearing during operation, there are many reasons for the noise of the needle roller bearing, including preload (preload refers to the force applied to the inside of the bearing after the bearing is installed on the shaft. This force can eliminate the gap between the bearing and the shaft, prevent the bearing from generating excessive clearance or unstable rotation during operation, thereby reducing noise). If the bearing preload is too large or too small, it may cause increased noise. This technology cannot adjust the bearing preload, resulting in increased noise. Utility Model Content

[0005] The utility model aims to solve the above-mentioned technical problems and provide a low-noise needle roller bearing capable of adjusting the preload force of the bearing on the shaft and reducing the noise generated.

[0006] In view of this, the utility model provides a needle roller bearing with low noise, comprising:

[0007] An outer ring having an inner ring for enclosing a circular hollow inner cavity for accommodating the rotor;

[0008] A cage is provided between the outer ring and the inner ring;

[0009] A mounting groove is provided on the retaining frame, and a plurality of mounting grooves are provided, which are evenly spaced and distributed along the circumferential direction;

[0010] The needle roller is arranged in the mounting groove, and both ends of the cylindrical surface of the needle roller have correction surfaces;

[0011] An adjustment mechanism, disposed inside the inner ring, for adjusting the preload force applied by the bearing to the rotor;

[0012] The regulating mechanism includes:

[0013] Clamp rings are arranged at the upper and lower ends of the inner ring;

[0014] A connecting spring is arranged between the clamp ring and the inner ring, and there are a plurality of connecting springs;

[0015] There are multiple mounting frames, which are arranged on the inner wall of the outer ring by bolt connection;

[0016] A cylinder is arranged on a mounting frame;

[0017] A connecting plate is arranged on the piston rod of the cylinder, and the connecting plate is key-connected with the clamp ring;

[0018] A sensor is arranged on the inner wall of the clamp ring and is used to measure the pressure and deformation of the clamp ring;

[0019] The control unit is used for receiving data from the sensor and adjusting the clamp ring to achieve a desired preload force, and the control unit is electrically connected to the cylinder.

[0020] In the above technical solution, further, the control unit includes:

[0021] A data processing module is electrically connected to the sensor, receives data information detected by the sensor, and uses computer vision or data processing technology to perform real-time analysis and feedback on the measured data;

[0022] The control module receives the instruction from the data processing module, controls the opening and closing of the cylinder, and realizes the desired pre-tightening force of the clamp ring on the rotor.

[0023] In any of the above technical solutions, further, a sound insulation cover is provided on the outer side of the outer ring.

[0024] In any of the above technical solutions, further, dustproof plates are provided on both the front and rear sides of the outer ring, and the dustproof plates are connected to the outer ring by bolts, and a guide is formed between the two dustproof plates for the bearing to slide and adjust the preload force.

[0025] In any of the above technical solutions, further, an oil storage unit is included, and the oil storage unit includes:

[0026] An oil storage channel is arranged inside the retainer, and the oil storage channel extends forward to penetrate the retainer;

[0027] The oil outlet passage is arranged at the left and right ends of the oil storage passage, the oil outlet passage runs through the retaining frame, and the oil outlet passage is located on the left and right sides of the needle roller.

[0028] In any of the above technical solutions, further, a dust cover is provided at the front end of the oil storage channel.

[0029] The beneficial effects of the utility model are:

[0030] 1. The clamp ring is driven by the cylinder to move and contact the rotor. The sensor measures the pressure and deformation of the clamp ring and transmits these data to the data processing module. The data processing module performs real-time analysis and feedback on the acquired data to determine the preload force currently applied by the clamp ring to the rotor. If it is detected that the preload force is insufficient or exceeds the set value, the data processing module transmits the corresponding information to the control module. The control module receives the instructions from the data processing module and controls the opening and closing action of the cylinder. The action of the cylinder will adjust the position and pressure of the clamp ring to achieve or maintain the preset rotor preload force, thereby reducing the generation of noise;

[0031] 2. The soundproof cover can effectively absorb or reduce the propagation of sound waves generated when the bearing is running, thereby reducing the overall noise level of the bearing system;

[0032] 3. The dustproof plate prevents dust, dirt and other particles in the external environment from entering the bearing, thereby protecting the needle roller and other key components from contamination or wear. The dustproof plate serves as a guide for adjusting the preload force when the bearing slides, and can assist in adjusting the preload force of the bearing to ensure its reliable operation in various working environments.

[0033] 4. When the needle roller bearing is running, the oil reservoir supplies lubricating oil to the contact surface of the needle roller and other bearing components through the oil outlet channels evenly distributed around the retaining frame to maintain the lubrication of the bearing. The lubricating oil ensures its normal operation and reduces friction and wear, reduces noise generation, thereby extending its service life and improving performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0035] Figure 2 It is a schematic diagram of the three-dimensional structure of the first part of the utility model;

[0036] Figure 3 It is a schematic diagram of the three-dimensional structure of the second part of the utility model;

[0037] Figure 4 It is a schematic diagram of the three-dimensional structure of the third part of the utility model;

[0038] Figure 5 It is a three-dimensional structural schematic diagram of the adjustment mechanism of the utility model;

[0039] Figure 6 It is the framework diagram of the utility model system;

[0040] The reference numerals in the figure are: 1. outer ring; 2. inner ring; 3. retaining frame; 4. mounting groove; 5. needle roller; 6. adjustment mechanism; 61. clamping ring; 62. connecting spring; 63. mounting frame; 64. cylinder; 65. connecting plate; 66. sensor; 67. control unit; 671. data processing module; 672. control module; 7. sound insulation cover; 8. dustproof plate; 9. oil storage part; 91. oil storage channel; 92. oil outlet channel; 10. dust cover. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0042] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0043] Embodiment 1:

[0044] like Figure 1 , Figure 5 and Figure 6 As shown, this embodiment provides a low-noise needle roller bearing, characterized in that it includes:

[0045] An outer ring 1 having an inner ring 2 for enclosing a circular hollow inner cavity for accommodating a rotor;

[0046] A cage 3 is arranged between the outer ring 1 and the inner ring 2;

[0047] A mounting groove 4 is provided on the retaining frame 3, and a plurality of mounting grooves 4 are provided, which are evenly spaced and distributed along the circumferential direction;

[0048] The needle roller 5 is arranged in the mounting groove 4, and both ends of the cylindrical surface of the needle roller 5 have modified curved surfaces;

[0049] An adjustment mechanism 6, arranged inside the inner ring 2, for adjusting the preload force applied by the bearing to the rotor;

[0050] The regulating mechanism 6 comprises:

[0051] Clamp rings 61 are arranged at the upper and lower ends of the inner ring 2;

[0052] A connecting spring 62 is provided between the clamp ring 61 and the inner ring 2, and there are a plurality of connecting springs 62;

[0053] The mounting frame 63 has a plurality of mounting frames, which are arranged on the inner wall of the outer ring 1 by bolt connection;

[0054] The cylinder 64 is arranged on the mounting frame 63;

[0055] A connecting plate 65 is provided on the piston rod of the cylinder 64, and the connecting plate 65 is key-connected with the clamp ring 61;

[0056] A sensor 66 is provided on the inner wall of the clamp ring 61 and is used to measure the pressure and deformation of the clamp ring 61;

[0057] The control unit 67 is used to receive data from the sensor 66 and adjust the clamp ring 61 to achieve a desired pre-tightening force. The control unit 67 is electrically connected to the cylinder 64 .

[0058] In the present technical solution, the outer ring 1 has a circular hollow inner cavity for accommodating the rotor, and the inner ring 2 is arranged inside the outer ring 1, forming the basic structure of the bearing. The retainer 3 is arranged between the outer ring 1 and the inner ring 2, and plays the role of fixing the needle roller 5. The mounting grooves 4 are opened on the retainer 3, evenly distributed along the circumference, and are used to accommodate the needle roller 5. The needle roller 5 is arranged in the mounting groove 4, and the two ends of its cylindrical surface have modified curved surfaces, which helps to reduce the stress concentration when the needle roller 5 contacts the inner and outer rings 1. An adjustment mechanism 6 is arranged inside the inner ring 2, and its main function is to adjust the preload force applied by the bearing to the rotor. The specific composition of the adjustment mechanism 6 is as follows: the clamping ring 61 is arranged at the upper and lower ends of the inner ring 2. The connecting spring 62 is arranged between the clamping ring 61 and the inner ring 2 to provide the adjustment force. The mounting frame 63 is connected to the inner wall of the outer ring 1 by bolts. The cylinder 64 is arranged on the mounting frame 63 to control the position of the clamping ring 61. The connecting plate 65 is connected to the piston rod of the cylinder 64 and is connected to the clamping ring 61. The sensor 66 is arranged on the inner wall of the clamp ring 61 to monitor the pressure and deformation of the clamp ring 61. The control unit 67 receives the data from the sensor 66 and adjusts the cylinder 64 accordingly to achieve the required preload force. The control unit 67 is linked with the cylinder 64 through an electrical connection to ensure that the clamp ring 61 can accurately control the application of the preload force when working.

[0059] When the preload force of the bearing needs to be adjusted, firstly, the inner ring 2 of the bearing is sleeved on the rotor, and then the cylinder 64 is started. The piston rod of the cylinder 64 extends to drive the connecting plate 65 to move, and the connecting plate 65 drives the clamping rings 61 on both sides to move inward, the connecting spring 62 is stretched, and the clamping ring 61 moves to contact with the rotor. The sensor 66 monitors the pressure and deformation of the clamping ring 61 in real time, and the sensor 66 sends the detected data. After receiving the data, the control unit 67 controls the cylinder 64 accordingly to achieve the required preload force, ensuring that the clamping ring 61 can accurately control the preload force, and eliminate the gap between the bearing and the rotor through the preload force, so as to prevent the bearing from generating excessive clearance or unstable rotation during operation, causing The increase of noise is caused. When the bearing needs to be disassembled, the cylinder 64 is started, the piston rod of the cylinder 64 is retracted, and the clamping ring 61 is driven to move outward through the connecting plate 65, and the connecting spring 62 is reset accordingly. The connecting spring 62 plays a buffering role, so that the clamping ring 61 is stably connected to the inner ring 2, avoiding the collision between the clamping ring 61 and the inner ring 2 during the movement and causing wear, thereby increasing the service life of the inner ring 2 and the clamping ring 61. After the operation is completed, the cylinder 64 is closed. In this way, the bearing preload force is controlled through precise adjustment, thereby ensuring that the bearing can stably and efficiently support and transmit the kinetic force of the rotor during operation, thereby reducing the generation of noise, and at the same time reducing wear and energy loss.

[0060] like Figure 6 As shown, in this embodiment, the control unit 67 is optimized to include:

[0061] The data processing module 671 is electrically connected to the sensor 66, receives the data information detected by the sensor 66, and uses computer vision or data processing technology to perform real-time analysis and feedback on the measured data;

[0062] The control module 672 receives the instruction from the data processing module 671 and controls the opening and closing of the cylinder 64 to achieve the desired pre-tightening force of the clamp ring 61 on the rotor.

[0063] In the present technical solution, the data processing module 671 is electrically connected to the sensor 66 and is responsible for receiving the data information detected by the sensor 66. The sensor 66 usually measures the pressure and deformation of the clamp ring 61 and transmits these data to the data processing module 671. The data processing module 671 uses computer vision or other data processing technologies to perform real-time analysis and feedback on the data obtained by the sensor 66. The data processing module 671 can determine the preload force applied by the clamp ring 61 to the rotor by real-time analysis of the sensor 66 data. If it is detected that the preload force is insufficient or exceeds the set value, the data processing module 671 transmits the corresponding information to the control module 672. The control module 672 receives the instruction from the data processing module 671. The control module 672 responds to the received instruction. Control the opening and closing action of the cylinder 64. The action of the cylinder 64 will adjust the position and pressure of the clamp ring 61 to achieve or maintain the preset rotor preload. The control module 672 accurately adjusts the working state of the cylinder 64 according to the real-time analysis results of the data processing module 671. If the preload is lower than the set value, the control module 672 sends a command to the cylinder 64 to increase the pressure appropriately. On the contrary, if the preload exceeds the set value, the control module 672 adjusts the cylinder 64 to reduce the pressure. The goal of the entire control system is to ensure that the clamp ring 61 can accurately control the preload on the rotor. Through the real-time analysis of the data processing module 671 and the feedback adjustment of the control module 672, the system can dynamically respond to changes in working conditions to ensure that the rotor is always in a stable preload state during operation.

[0064] Embodiment 2:

[0065] This embodiment provides a low-noise needle roller bearing, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0066] like Figure 1 , Figure 4 and Figure 5 As shown, in this embodiment, a sound insulation cover 7 is optimized on the outer side of the outer ring 1 .

[0067] In the present technical solution, the sound insulation cover 7 is located outside the outer ring 1 of the needle roller bearing 5. Its main function is to prevent the noise generated during the operation of the bearing from being transmitted to the external environment. The sound insulation cover 7 can effectively absorb or reduce the propagation of sound waves generated during the operation of the bearing through its designed structure and material properties, thereby reducing the overall noise level of the bearing system.

[0068] Embodiment 3:

[0069] This embodiment provides a low-noise needle roller bearing, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0070] like Figure 1 , Figure 4 and Figure 5 As shown, in this embodiment, dustproof plates 8 are provided on both the front and rear sides of the outer ring 1 in an optimized manner. The dustproof plates 8 are connected to the outer ring 1 by bolts, and a guide is formed between the two dustproof plates 8 for the bearing to slide and adjust the preload force.

[0071] In this technical solution, the dustproof plates 8 are arranged on the front and rear sides of the outer ring 1 and connected to the outer ring 1 by bolts to form a closed structure. The main function of the dustproof plates 8 is to prevent dust, dirt and other particles in the external environment from entering the bearing, thereby protecting the needle rollers 5 and other key components from pollution or wear. The closed space formed between the dustproof plates 8 is not only used for dust prevention, but also can be used as a guide for adjusting the preload when the bearing slides. When the bearing is running, the dustproof plates 8 effectively isolate the working area inside the bearing to ensure its cleanliness and normal operation. At the same time, the guide space formed between the dustproof plates 8 can assist in adjusting the preload of the bearing, so that it can maintain a stable working state and performance during operation, effectively improving the working stability and life of the bearing. The soundproof cover 7 prevents the external transmission of noise, while the dustproof plate 8 protects the inside of the bearing from pollution. At the same time, the preload of the bearing is adjusted by using its guide space to ensure its reliable operation in various working environments.

[0072] Embodiment 4:

[0073] This embodiment provides a low-noise needle roller bearing, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0074] like Figure 3 As shown, in this embodiment, the optimization further includes an oil storage portion 9, and the oil storage portion 9 includes:

[0075] The oil storage channel 91 is arranged inside the retainer 3, and the oil storage channel 91 extends forward to penetrate the retainer 3;

[0076] The oil outlet passages 92 are arranged at the left and right ends of the oil storage passage 91 . The oil outlet passages 92 penetrate the retaining frame 3 . The oil outlet passages 92 are located at the left and right sides of the needle roller 5 .

[0077] like Figure 3 As shown, in this embodiment, the front end of the oil storage channel 91 is optimized and provided with a dust cover 10.

[0078] In the present technical solution, after the dust plate 8 is disassembled as a whole, the dust cover 10 is pulled out and an appropriate amount of lubricating oil is added to the oil storage channel 91. The lubricating oil is stored in the oil storage channel 91. When the needle roller 5 bearing is running, the oil storage channel 91 supplies the lubricating oil to the contact surfaces of the needle roller 5 and other bearing components through the oil outlet channel 92 evenly distributed around the retaining frame 3. Then the dust cover 10 is installed back in place. The dust cover 10 ensures that the lubricating oil cannot flow out and keeps the bearing in a lubricated state. The lubricating oil ensures its normal operation and reduces friction and wear, reduces the generation of noise, thereby extending its service life and improving its performance.

[0079] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A low-noise needle roller bearing, characterized in that: include: An outer ring (1) having an inner ring (2) for enclosing a circular hollow inner cavity for accommodating a rotor; A retaining frame (3) is arranged between the outer ring (1) and the inner ring (2); A mounting groove (4) is provided on the retaining frame (3), wherein the mounting groove (4) is provided in a plurality and is evenly spaced and distributed in a circumferential direction; A needle roller (5) is arranged in the mounting groove (4), and both ends of the cylindrical surface of the needle roller (5) have corrected curved surfaces; An adjustment mechanism (6), arranged inside the inner ring (2), and used for adjusting the preload force applied by the bearing to the rotor; The regulating mechanism (6) comprises: Clamp rings (61) are arranged at the upper and lower ends of the inner ring (2); A connecting spring (62) is arranged between the clamp ring (61) and the inner ring (2), and there are a plurality of connecting springs (62); A plurality of mounting frames (63) are provided on the inner wall of the outer ring (1) by means of bolt connection; A cylinder (64) is arranged on the mounting frame (63); A connecting plate (65) is arranged on the piston rod of the cylinder (64), and the connecting plate (65) is key-connected to the clamping ring (61); A sensor (66) is arranged on the inner wall of the clamp ring (61) and is used to measure the pressure and deformation of the clamp ring (61); A control unit (67) is used to receive data from the sensor (66) and adjust the clamp ring (61) to achieve a desired pre-tightening force. The control unit (67) is electrically connected to the cylinder (64).

2. A low-noise needle roller bearing according to claim 1, characterized in that: The control unit (67) comprises: A data processing module (671) is electrically connected to the sensor (66), receives data information detected by the sensor (66), and uses computer vision or data processing technology to perform real-time analysis and feedback on the measured data; The control module (672) receives the instruction of the data processing module (671) and controls the opening and closing of the cylinder (64) to achieve the desired pre-tightening force of the clamping ring (61) on the rotor.

3. A low-noise needle roller bearing according to claim 1, characterized in that: A soundproof cover (7) is provided outside the outer ring (1).

4. A low-noise needle roller bearing according to claim 1, characterized in that: Dustproof plates (8) are provided on both the front and rear sides of the outer ring (1), and the dustproof plates (8) are connected to the outer ring (1) by bolt connection, and a guide for the bearing to slide and adjust the preload force is formed between the two dustproof plates (8).

5. The low-noise needle roller bearing according to claim 1, characterized in that: It also includes an oil storage portion (9), wherein the oil storage portion (9) includes: An oil storage passage (91) is arranged inside the retaining frame (3), and the oil storage passage (91) extends forward to penetrate the retaining frame (3); The oil outlet passage (92) is arranged at the left and right ends of the oil storage passage (91), the oil outlet passage (92) penetrates the retaining frame (3), and the oil outlet passage (92) is located on the left and right sides of the needle roller (5).

6. A low-noise needle roller bearing according to claim 5, characterized in that: A dust cover (10) is provided at the front end of the oil storage channel (91).

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