High-lead needle bearing

Abstract

The utility model discloses a high-lead needle bearing, and relates to the field of mechanical transmission. A traditional roller spacer is designed into the annular chain belt, the guide grooves are formed in the outer sides of the needle rollers to be matched with the rollers on the chain belt, the stroke of the needle roller bearing is not limited by the length of the spacer any more, and no matter the guide grooves in the four sides of the rectangular-block-shaped needle rollers or the guide grooves in the six sides of the hexagonal-block-shaped needle rollers are matched with the corresponding chain belt and the roller structures. As long as the conduction shaft is long enough, the roller pin shaft sleeve can do reciprocating infinite stroke motion, and the innovative design greatly expands the application field of the needle bearing, so that the needle bearing can be widely applied to a heavy-load, high-torque and orientable linear conduction motion device which cannot meet the requirement due to stroke limitation in the prior art; for example, a workbench moving mechanism of a large numerical control machine tool can achieve longer-distance accurate movement, a long-distance material conveying device in an automatic production line can operate more stably and efficiently, and the overall performance and production efficiency of equipment are improved.

Description

Technical Field

[0001] The utility model relates to the field of mechanical transmission, in particular to a high-lead needle roller bearing. Background Art

[0002] In the field of modern mechanical engineering, the performance of mechanical transmission systems plays a vital role in the normal operation and efficient work of various equipment. Among them, bearings, as a key mechanical component, are widely used in many mechanical equipment. Different types of bearings have their own advantages under different working conditions. Needle roller bearings, due to their compact structure, small radial dimensions and relatively large load-bearing capacity, are widely used in some specific situations where space is limited and a certain radial load needs to be withstand.

[0003] Some existing needle roller bearing technologies, such as the polygonal cylindrical needle roller guide sleeve with Chinese patent publication number CN220816273U, include a needle roller assembly and a long shaft. The needle roller guide sleeve is evenly provided with a first square groove and a second square groove. The needle roller guide sleeve is provided with a needle roller groove, in which a needle roller body is embedded and connected. The needle roller guide sleeve is provided with a first polygonal groove, in which the long shaft is mated and connected. The needle roller groove is used to limit the position of the needle roller body, effectively avoiding the displacement of the needle roller body. The transmission is carried out by replacing the traditional ball point connection method with a linear connection of the needle roller body, thereby increasing the contact area and extending the service life compared with the ball bearing under the same conditions. The long shaft, the first polygonal groove and the annular groove are designed to be an approximately quadrilateral structure with an arc transition. The needle roller bodies are installed with linear and uniform distribution in four directions, so that the nut can reciprocate linearly on the long shaft and the needle roller guide sleeve. At the same time, it can also meet the use of shafts with smaller shaft diameters, increasing the practicality of the guide sleeve.

[0004] However, this type of traditional needle roller bearings still faces a significant problem in practical applications, namely, limited stroke. Their operating stroke often depends on a certain proportion of the isolation plate length, such as one-half or two-thirds. In many devices that require long-stroke linear motion, such as the worktable moving mechanism of large CNC machine tools, long-distance material conveying devices in automated production lines, etc., this stroke limitation seriously restricts the performance improvement of the equipment. Since it cannot meet the long-stroke requirements, the equipment may need to frequently replace or adjust bearing components, which not only increases the maintenance cost and downtime of the equipment and reduces production efficiency, but may also affect the overall stability and precision control of the equipment. It cannot adapt to the development needs of modern industry for high-efficiency, high-precision, long-stroke mechanical transmission. Therefore, there is an urgent need for a new type of needle roller bearing to solve this stroke limitation problem in order to expand the application scope of needle roller bearings in more fields. Utility Model Content

[0005] Based on this, the purpose of the present invention is to provide a high-lead needle roller bearing to solve the technical problems mentioned in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a high-lead needle roller bearing, comprising a bearing sleeve and needle rollers, wherein the needle rollers are polygonal in design and guide grooves are provided on the outer edges of the needle rollers;

[0007] An inner limiter corresponding to the needle roller is installed in the bearing sleeve, and a chain belt is installed in the needle roller, and a roller located in the guide groove is installed on the chain belt;

[0008] The outer wall of the bearing sleeve is provided with a fixing mechanism for connecting the bearing sleeve with an external component.

[0009] By adopting the above technical solution, the bearing sleeve works together with the needle roller, internal limiter and other components to achieve force transmission and support. The polygonal needle roller and guide groove design, combined with the chain belt and roller, breaks the stroke limitation and adapts to long stroke requirements. For example, in large equipment, it ensures the continuity of transmission and improves the overall performance of the equipment. It is widely used in heavy-load and high-torque scenarios, and promotes the development of mechanical transmission towards high efficiency and long stroke.

[0010] Furthermore, the needle rollers are designed in a rectangular block shape, and the four groups of outer edges of the needle rollers are each provided with guide grooves corresponding to the rollers.

[0011] By adopting the above technical solution, the load-bearing and movement performance of the needle roller are optimized. The four sets of outer guide grooves of the rectangular block needle roller enable the roller to cooperate with it in multiple directions, evenly disperse the force, improve the load-bearing capacity, and enhance stability under high-load conditions, such as the movement of the CNC machine tool worktable, to ensure precise movement, reduce equipment failures, extend equipment service life, reduce maintenance costs, and improve production efficiency and product quality.

[0012] Furthermore, the shape of the inner limiter matches the inner contour of the bearing sleeve and fits tightly against the inner wall of the bearing sleeve, and the inner limiter is fixedly connected to the bearing sleeve.

[0013] By adopting the above technical solution, the limiting and guiding function of the internal limiter on the needle roller is enhanced. Its shape is adapted to the bearing sleeve and is tightly fitted and fixed, ensuring that the needle roller moves along the specified trajectory, improving the movement accuracy, preventing the needle roller from deflecting and shaking during high-speed operation or complex force, ensuring stable operation of the bearing, and enhancing overall reliability. It is suitable for mechanical transmission systems with high precision requirements, such as precision instruments and equipment.

[0014] Furthermore, the chain belt is an annular structure, and the chain belt is wrapped around the inside of the inner limiter, and the number of chain belts provided corresponds to the number of outer edges of the needle rollers.

[0015] By adopting the above technical solution, the chain belt can ensure continuous and effective support for the needle roller. The annular chain belt surrounds the inner limiter and the number of the annular chain belt corresponds to the outer edge of the needle roller, providing all-round continuous support for the needle roller and ensuring smooth rolling. Regardless of the position of the needle roller, stable transmission can be maintained to adapt to different working conditions, such as material transportation in automated production lines, improving equipment operation stability and efficiency, and reducing downtime.

[0016] Furthermore, the rollers are evenly distributed on the chain belt, and the diameter of the rollers is greater than the depth of the guide grooves.

[0017] By adopting the above technical solution, the stable rolling of the rollers in the guide groove is guaranteed. The rollers are evenly distributed and their diameter is greater than the depth of the guide groove, which not only stabilizes the rolling but also prevents them from falling out, ensuring reliable transmission. During equipment operation, the risk of failure caused by roller falling out is reduced, ensuring continuous operation of the equipment, improving production safety, and is suitable for equipment that works continuously for a long time.

[0018] Furthermore, the fixing mechanism includes a flange, which is arranged on the outer wall of the bearing sleeve and has a mounting hole.

[0019] By adopting the above technical solution, a convenient bearing connection method is provided. The flange is arranged on the outer wall of the bearing sleeve, which is convenient for connection with external components such as the drive shaft, the frame, etc., so that the installation process is standardized, the assembly efficiency is improved, the installation difficulty is reduced, it is suitable for the manufacture and maintenance of equipment, the versatility and maintainability of the equipment are enhanced, and the wide application of technology is promoted.

[0020] Furthermore, there are multiple mounting holes, and the multiple mounting holes are distributed in a ring array on the flange.

[0021] By adopting the above technical solution, the connection stability between the flange and the outside is optimized. The multiple mounting holes distributed in a circular array make the connection force evenly distributed, avoiding local stress concentration. When transmitting torque and bearing loads, the connection is ensured to be reliable, and the overall structural strength of the equipment is improved. For example, in heavy machinery, the equipment operation stability is enhanced and the equipment service life is extended.

[0022] Furthermore, the inner limiter is a structure with an outer circle and an inner polygon, and the inner polygon of the inner limiter is adapted to the polygon of the needle roller.

[0023] By adopting the above technical solution, the compatibility between the internal limiter and the needle roller is further improved. The internal limiter has an outer circle and an inner polygonal structure and is compatible with the polygon of the needle roller. The needle roller is accurately limited to ensure movement accuracy. Under complex working conditions, the needle roller maintains stable movement, reduces wear, and improves bearing performance. It is suitable for high-precision, high-load mechanical transmission and ensures stable operation of the equipment.

[0024] Furthermore, the chain belt is made of high-strength wear-resistant material, and the chain belt and the roller are rotationally connected.

[0025] By adopting the above technical solution, the transmission efficiency of the chain belt and the roller is improved. The chain belt and the roller are rotatably connected, which reduces friction resistance and enables the roller to flexibly adapt to the movement of the needle roller, thereby improving transmission efficiency and reducing energy consumption. During equipment operation, it reduces component wear, extends service life, improves equipment economy and operational stability, and complies with the development trend of energy conservation and environmental protection.

[0026] Furthermore, the needle rollers are designed in a hexagonal block shape, and the six groups of needle rollers are each provided with guide grooves corresponding to the rollers on their outer sides.

[0027] By adopting the above technical solutions, the design options of needle rollers are enriched. The six sets of outer guide grooves of the hexagonal block needle rollers increase the contact points, making the transmission smoother and adapting to the needs of different working conditions. For example, in high-speed rotating equipment, it reduces vibration and noise, improves transmission accuracy, enhances the operation quality of equipment, and expands the application range of needle roller bearings under diverse working conditions.

[0028] In summary, the present invention has the following beneficial effects:

[0029] 1. The utility model designs the traditional roller isolation plate into an annular chain belt, and opens a guide groove on the outside of the needle roller to cooperate with the roller on the chain belt, so that the stroke of the needle roller bearing is no longer limited by the length of the isolation plate. Whether it is a rectangular block needle roller with four-sided guide grooves or a hexagonal block needle roller with six-sided guide grooves, with the corresponding chain belt and roller structure, as long as the conduction shaft is long enough, the needle roller sleeve can achieve unlimited reciprocating stroke movement. This innovative design greatly expands the application field of needle roller bearings, making it widely used in heavy-load, high-torque, and directional linear conduction motion devices that could not meet the needs in the past due to stroke limitations. For example, the worktable moving mechanism of large CNC machine tools can achieve precise movement over longer distances, and the long-distance material conveying device in the automated production line can operate more stably and efficiently, thereby improving the overall performance and production efficiency of the equipment.

[0030] 2. The present invention uses the polygonal design of the needle roller and the coordination of multiple sets of outer guide grooves and rollers to make the needle roller bear more uniform force during movement. When bearing heavy loads and high torques, multiple contact points can share the load together, reducing the pressure of a single contact point, thereby improving the load-bearing capacity of the needle roller. At the same time, the precise limiting and guiding effect of the internal limiter on the needle roller ensures the stability of the needle roller during movement, avoids the deviation and shaking of the needle roller, and further enhances the reliability of the entire bearing under high-load conditions. Whether operating at high speed or under complex force conditions, the needle roller bearing of the present invention can maintain a stable movement state, providing a strong guarantee for the normal operation of the equipment.

[0031] 3. The utility model uses the annular design of the chain belt and the uniform distribution and rotational connection of the rollers on the chain belt to make the rollers roll more smoothly in the guide groove and reduce friction resistance. Compared with traditional needle roller bearings, under the same running time and stroke, the total force of each needle roller in the utility model is greatly reduced, because the annular design enables the needle roller to continuously change the contact point with the guide shaft during movement, avoiding local excessive wear. At the same time, the chain belt is made of high-strength wear-resistant material, which can withstand long-term friction and wear, further reducing the loss of components. These factors work together to significantly extend the service life of the needle roller bearings, reduce the maintenance frequency and cost of the equipment, and improve the economy and reliability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0033] Figure 2 is a perspective view of the present utility model;

[0034] Figure 3 It is a side view of the utility model;

[0035] Figure 4 This is a schematic diagram of the three-dimensional structure of the second embodiment of the present utility model;

[0036] Figure 5 A perspective view of a second embodiment of the present invention;

[0037] Figure 6 It is a side view of the second embodiment of the present utility model.

[0038] In the figure: 1, bearing sleeve; 11, flange; 12, mounting hole; 2, needle roller; 21, guide groove; 3, internal limiter; 31, chain belt; 32, roller. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0040] The following describes an embodiment of the present invention based on its overall structure.

[0041] The utility model provides a high-lead needle roller bearing, which aims to solve the problem of limited stroke of traditional needle roller bearings and meet the needs of modern industry for high-efficiency, high-precision and long-stroke mechanical transmission. Its core innovation lies in the unique design and coordinated operation of components such as the needle roller 2, internal limiter 3, chain belt 31 and roller 32.

[0042] A high-lead needle roller bearing, such as Figure 1 - Figure 6 As shown, the high-lead needle roller bearing mainly consists of a bearing sleeve 1, a needle roller 2, an internal limiter 3, a chain belt 31, a roller 32 and a fixing mechanism;

[0043] The bearing sleeve 1 serves as the basic supporting component, providing installation space for internal components such as the needle roller 2 and the internal limiter 3, and is connected to the external components through the fixing mechanism on the outer wall to achieve force transmission and overall fixation;

[0044] The needle roller 2 in this embodiment is of polygonal design, and a guide groove 21 is opened on its outside. It is a key component for realizing rolling transmission. The internal limiter 3 is installed in the bearing sleeve 1, corresponding to the needle roller 2, and plays a role in limiting and guiding the movement of the needle roller 2. The chain belt 31 is installed in the needle roller 2, and the roller 32 on the chain belt 31 is located in the guide groove 21 of the needle roller 2. The smooth rolling of the needle roller 2 is achieved through the cooperation between the roller 32 and the guide groove 21. At the same time, the annular structure design of the chain belt 31 provides continuous rolling support for the needle roller 2, breaking the limitation of the limited stroke of traditional needle roller bearings, so that this high-lead needle roller bearing has a relatively unlimited stroke in actual use.

[0045] The needle roller 2 in this embodiment is designed in a polygonal block shape;

[0046] In some examples, the needle roller 2 is in the shape of a rectangular block, and its four groups of outer edges are each provided with guide grooves 21 corresponding to the rollers 32. The design of multiple groups of guide grooves 21 enables the needle roller 2 to effectively cooperate with the rollers 32 in multiple directions, evenly disperse the force, and improve the load-bearing capacity and movement stability of the needle roller 2.

[0047] Of course, in other examples, the needle roller 2 can also be in the shape of a hexagonal block. When it is in the shape of a hexagonal block, the six sets of outer guide grooves 21 further increase the contact points with the roller 32, making the transmission smoother and adapting to different working conditions. The polygonal design can also enable the needle roller 2 to better maintain a stable position in the bearing sleeve 1 and reduce the possibility of offset.

[0048] In this embodiment, the shape of the inner limiter 3 matches and fits tightly with the inner contour of the bearing sleeve 1, and is fixedly connected to the bearing sleeve 1. It is an outer circle and inner polygon structure, and the inner polygon is adapted to the polygon of the needle roller 2. This design ensures that the inner limiter 3 can accurately limit the needle roller 2, prevent the needle roller 2 from excessive radial displacement during movement, and ensure that the needle roller 2 always moves within the prescribed trajectory, thereby improving the movement accuracy and reliability of the entire bearing. At the same time, the fixed connection method between the inner limiter 3 and the bearing sleeve 1 enhances the integrity of the structure, so that the bearing can remain stable even when it is under a large load.

[0049] Exemplarily, the chain belt 31 is an annular structure, which surrounds the inside of the inner limiter 3, and the number of the chain belt 31 corresponds to the number of the outer edges of the needle roller 2. This annular design enables the chain belt 31 to continuously provide support for the needle roller 2. No matter what position the needle roller 2 moves to, the chain belt 31 and the roller 32 cooperate to ensure the smoothness of rolling. The roller 32 is evenly distributed on the chain belt 31, and the diameter of the roller 32 is greater than the depth of the guide groove 21, ensuring that the roller 32 can roll stably in the guide groove 21 without falling out of the guide groove 21. The chain belt 31 and the roller 32 are connected in a rotating manner. This connection method reduces the friction resistance during rolling, improves the transmission efficiency, and enables the roller 32 to flexibly adapt to the movement of the needle roller 2, further ensuring the smooth rolling of the needle roller 2.

[0050] In some examples, the fixing mechanism includes a flange 11, which is arranged on the outer wall of the bearing sleeve 1. A plurality of mounting holes 12 are opened on the flange 11, and these mounting holes 12 are distributed in a circular array on the flange 11. The design of the flange 11 and the mounting holes 12 facilitates the connection of the bearing with external components, such as with a drive shaft, an equipment frame and other components. The mounting holes 12 distributed in a circular array can make the connection more uniform and stable. When transmitting torque and bearing loads, the force can be evenly distributed on the flange 11, avoiding excessive local stress, thereby improving the reliability of the connection and the stability of the entire device.

[0051] Of course, in other examples, the fixing mechanism can also be a welding operation, which ensures the fixation between the bearing and the external component by welding the bearing and the external component, thereby further improving the reliability of the connection and the stability of the entire device.

[0052] The working principle of the utility model is as follows: when the high-lead needle roller bearing is working, when the external component (such as a transmission shaft) drives the bearing sleeve 1 to rotate, the needle roller 2 in the bearing sleeve 1 is kept in a specific position and performs rolling motion due to the interaction with the internal limiter 3;

[0053] Because the guide groove 21 outside the needle roller 2 fits tightly with the rollers 32 on the chain belt 31, the rollers 32 are evenly distributed on the chain belt 31 and can roll stably in the guide groove 21. The annular structure of the chain belt 31 provides continuous support for the rollers 32, allowing them to maintain contact with the guide groove 21.

[0054] When the needle roller 2 starts to move, it rolls smoothly along the contour of the inner stopper 3 under the support of the roller 32, achieving stable linear motion transmission. Through the design of the roller 32 and the guide groove 21, as long as the roller 32 is long enough, infinite linear motion can be achieved, so that the high-lead needle roller bearing has a relatively infinite travel in actual use.

[0055] At the same time, due to the annular design of the chain belt 31, the needle roller 2 continuously changes the contact point with the guide shaft during movement, avoiding local excessive wear and ensuring the high efficiency and stability of the transmission; the fixing mechanism on the outer wall of the bearing sleeve 1, such as the flange 11 and the mounting hole 12 or the welding connection method, firmly connects the bearing to the external equipment, ensuring that when transmitting torque and bearing loads, the entire device can remain stable, the force can be evenly distributed, and reliable power transmission can be achieved, so that the equipment can operate normally and meet the working requirements of heavy load, high torque, long stroke linear transmission, etc.

[0056] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not limitations on the present invention. The specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and purpose of the present invention, but as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A high-lead needle roller bearing, characterized in that: It comprises a bearing sleeve (1) and a needle roller (2), wherein the needle roller (2) is polygonal in design and a guide groove (21) is provided on the outer edge of the needle roller (2); An inner limiter (3) corresponding to the needle roller (2) is installed in the bearing sleeve (1), and a chain belt (31) is installed in the needle roller (2), and a roller (32) located in the guide groove (21) is installed on the chain belt (31); The outer wall of the bearing sleeve (1) is provided with a fixing mechanism for connecting the bearing sleeve with an external component.

2. The high-lead needle roller bearing according to claim 1, characterized in that: The needle roller (2) is designed in a rectangular block shape, and four groups of outer edges of the needle roller (2) are each provided with a guide groove (21) corresponding to the roller (32).

3. The high-lead needle roller bearing according to claim 1, characterized in that: The shape of the inner stopper (3) matches the inner contour of the bearing sleeve (1) and fits tightly against the inner wall of the bearing sleeve (1), and the inner stopper (3) is fixedly connected to the bearing sleeve (1).

4. The high-lead needle roller bearing according to claim 1, characterized in that: The chain belt (31) is an annular structure, and the chain belt (31) surrounds the interior of the inner limiter (3), and the number of the chain belts (31) corresponds to the number of the outer edges of the roller needles (2).

5. The high-lead needle roller bearing according to claim 1, characterized in that: The rollers (32) are evenly distributed on the chain belt (31), and the diameter of the rollers (32) is greater than the depth of the guide groove (21).

6. The high-lead needle roller bearing according to claim 1, characterized in that: The fixing mechanism comprises a flange (11), the flange (11) is arranged on the outer wall of the bearing sleeve (1), and a mounting hole (12) is opened on the flange (11).

7. The high-lead needle roller bearing according to claim 6, characterized in that: There are multiple mounting holes (12), and the multiple mounting holes (12) are distributed in a ring array on the flange (11).

8. The high-lead needle roller bearing according to claim 1, characterized in that: The inner stopper (3) is an outer circle and inner polygon structure, and the inner polygon of the inner stopper (3) is compatible with the polygon of the needle roller (2).

9. The high-lead needle roller bearing according to claim 1, characterized in that: The material of the chain belt (31) is a high-strength wear-resistant material, and the chain belt (31) and the roller (32) are rotationally connected.

10. The high-lead needle roller bearing according to claim 1, characterized in that: The needle rollers (2) are designed in a hexagonal block shape, and six groups of outer edges of the needle rollers (2) are all provided with guide grooves (21) corresponding to the rollers (32).

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