High steel type rotary needle roller spline

Abstract

The utility model discloses a high steel type rotary needle roller spline, which relates to the field of mechanical transmission and comprises a ball spline shaft and a ball spline female body. A crossed needle bearing is arranged on the ball spline nut body, and the outer wall of the crossed needle bearing is rotationally connected with an outer connecting disc which is used for being connected with external equipment. By adopting the crossed needle roller bearing structure, the contact area between the crossed needle rollers and the inner and outer rotating channels is greatly increased compared with the ball point contact of the traditional ball bearing, the pressure can be more uniformly distributed on the contact surface when the ball bearing bears load, the pressure of each contact point is effectively reduced, and the service life of the ball bearing is prolonged. Therefore, the load capacity of the whole device is improved, the device can stably and reliably work under the high-load working condition such as the scenes of main shaft transmission of a large machine tool, power transmission of heavy mechanical equipment and the like, damage or failure of parts caused by overlarge load is not prone to occurring, the service life of the equipment is prolonged, and the maintenance cost is reduced.

Description

Technical Field

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

[0002] In the field of modern mechanical engineering, rotary transmission devices play a vital role and are widely used in many industries such as machine tools, automated production lines, automobiles, aerospace, etc. Rotary ball splines, as a commonly used rotary transmission component, can achieve relative rotational motion between the shaft and the sleeve, and transmit torque and axial force. Their performance directly affects the operating accuracy, stability and reliability of the entire mechanical system.

[0003] At present, the common rotating ball splines on the market usually adopt ordinary single-groove or double-groove ball bearing structures. The rotating ball splines with this ball bearing structure have certain limitations. The force and motion between the ball and the raceway are transmitted by ball point contact. Due to the small contact area of ​​the ball point, the pressure on each contact point is relatively large when it is under load. This not only limits its load capacity, but also easily generates large contact stress under high load conditions, thereby accelerating the wear of the ball and the raceway and affecting its service life. At the same time, because of the ball point contact, the positioning accuracy between the ball and the raceway is difficult to control during the rotation process. The point contact method is easily affected by machining accuracy and assembly The influence of factors such as precision and vibration and impact during operation leads to axial movement and radial runout during rotation, which reduces the precision of the entire rotating transmission device. In some application scenarios with high precision requirements, such as precision machine tool processing and high-precision automation equipment, this low-precision rotating ball spline cannot meet the use requirements, which will lead to problems such as increased processing errors and reduced product quality. In addition, under high-speed rotation conditions, due to the instability of ball point contact, noise and vibration are easily generated, which not only affects the comfort of the working environment, but may also further aggravate the wear of components and even cause mechanical failures, increase equipment maintenance costs and downtime, and reduce production efficiency.

[0004] To sum up, the existing rotary ball spline with ordinary ball bearing structure has many shortcomings in load capacity, positioning accuracy, stability, etc., and cannot meet the demand for high-precision, high-load, and high-stability rotary transmission components in modern mechanical engineering. There is an urgent need for a new rotary ball spline structure to solve these problems. Utility Model Content

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

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-steel rotary needle roller spline, comprising a ball spline shaft and a ball spline nut body;

[0007] The ball spline nut body is provided with a cross needle roller bearing, and the outer wall of the cross needle roller bearing is rotatably connected to an external connection plate for connecting to external equipment;

[0008] The crossed needle roller bearing includes a retaining frame, crossed needle rollers, an inner rotating track and an outer rotating track. The retaining frame is rotatably connected to the ball spline nut body, and a crossed needle roller is rotatably installed in the retaining frame. The crossed needle roller is installed between the inner rotating track and the outer rotating track through the retaining frame. The ball spline shaft and the ball spline nut body realize relative rotational motion through the crossed needle roller bearing.

[0009] By adopting the above technical solution, the basic structure of high-steel rotary needle roller spline was constructed. The combination of ball spline shaft, ball spline nut and cross needle roller bearing realizes efficient rotary transmission. In the mechanical transmission system, it ensures the stable transmission of torque and axial force, improves the operating accuracy and reliability of the system, and is suitable for a variety of mechanical equipment, such as machine tools, automated production lines, etc., and enhances the overall performance of the equipment.

[0010] Furthermore, a ball groove is provided on the ball spline shaft, and the ball groove is in rolling engagement with a ball body provided in the ball spline female body.

[0011] By adopting the above technical solution, the torque transmission method is optimized. The rolling cooperation between the ball groove and the ball body makes the torque transmission smoother, reduces friction and wear, reduces energy loss in the long-term operation of the equipment, extends the service life of components, improves transmission efficiency, and ensures the stable operation of the equipment. The advantages are obvious especially under high-speed rotation conditions.

[0012] Furthermore, the inner rotating track is provided on the outer wall of the ball spline nut body, and the shape of the inner rotating track is adapted to the cross needle roller.

[0013] By adopting the above technical solution, the stable rolling of the cross needle roller is ensured. The shape of the inner rotating track is adapted to the cross needle roller, providing a good rolling track for the cross needle roller. During operation, the shaking and deviation of the cross needle roller are reduced, the smoothness of the transmission is improved, and the load capacity and accuracy of the device are enhanced. It is suitable for the field of precision machinery with high precision requirements.

[0014] Furthermore, the outer rotating track is arranged on the outer wall of the outer connecting disk, and the outer rotating track is arranged concentrically with the inner rotating track.

[0015] By adopting the above technical solution, uniform force is ensured on the cross needle rollers. The outer rotating track and the inner rotating track are arranged concentrically, so that the cross needle rollers are uniformly stressed between the inner and outer rotating tracks. When subjected to high loads, the pressure is effectively dispersed, stress concentration is reduced, the stability and reliability of the device are improved, the risk of component damage is reduced, and the service life of the device is extended.

[0016] Furthermore, the outer rotating track and the inner rotating track are both designed as annular grooves, and multiple groups of the outer rotating track and the inner rotating track are provided.

[0017] By adopting the above technical solution, the load-bearing capacity and stability of the device are further enhanced. The design of multiple sets of annular grooves increases the contact area, so that the cross needle rollers can better withstand radial and axial forces during rotation. Under heavy machinery or high load conditions, it can operate stably, ensuring the normal operation of the equipment and improving the device's adaptability to complex working conditions.

[0018] Furthermore, a plurality of groups of positioning cross needle rollers are mounted at equal angles on the retaining frame, and the structural design of the retaining frame enables the cross needle rollers to maintain a stable spacing and distribution state during operation.

[0019] By adopting the above technical solution, the running stability of the crossed needle rollers is improved. The crossed needle rollers are installed and positioned at equal angles on the cage, so that they maintain a stable spacing and distribution during operation, avoiding mutual interference and collision of the crossed needle rollers, ensuring the accuracy and reliability of the transmission, and performing excellently in equipment with high-speed rotation and frequent start-stop.

[0020] Furthermore, the longitudinal section of the cross-roller needles is designed to be diamond-shaped, and the cross-section of the cross-roller needles is designed to be circular.

[0021] By adopting the above technical solution, the comprehensive performance of the crossed needle rollers is improved. The diamond longitudinal cross-section design enhances impact resistance and load-bearing capacity, and the circular cross-section ensures smooth rolling. Under different working conditions, the crossed needle rollers can better adapt to changes in force, thereby improving the overall performance of the device and reducing maintenance costs.

[0022] Furthermore, a connecting plate is installed on the outer wall of the retaining frame, and a group of external connecting plates are connected to the upper and lower ends of the connecting plate.

[0023] By adopting the above technical solution, the connection mode and versatility of the device are expanded. The combination of the connection plate and the external connection plate realizes multiple connections with external components through the mounting holes and docking holes, which is convenient for integration with different equipment, improves the compatibility of the device, and is suitable for the assembly and upgrade of various complex mechanical systems.

[0024] Furthermore, the connection plate is provided with a plurality of mounting holes at equal angles, and the connection plate is provided with a plurality of docking holes corresponding to the mounting holes.

[0025] By adopting the above technical solution, the precise connection between the device and external components is facilitated, and the corresponding design of the mounting holes and the docking holes ensures the accuracy and reliability of the connection. During the installation process, the adjustment time and error are reduced, the assembly efficiency of the equipment is improved, and the stable performance of the entire mechanical system is ensured.

[0026] Furthermore, the ball spline nut body is made of a high-rigidity material.

[0027] By adopting the above technical solution, the rigidity and strength of the device are enhanced. The ball spline nut body made of high-rigidity material can effectively reduce deformation under high-load conditions, ensuring the accuracy and stability of the device, improving the load-bearing capacity of the device, extending its service life, and meeting the needs of high-precision, high-load mechanical transmission.

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

[0029] 1. The utility model adopts a cross needle roller bearing structure. The contact area between the cross needle rollers and the inner rotating track and the outer rotating track is greatly increased compared with the ball point contact of traditional ball bearings. When bearing load, the pressure can be more evenly distributed on the contact surface, effectively reducing the pressure at each contact point, thereby improving the load capacity of the entire device. Under high-load conditions, such as the spindle drive of large machine tools, power transmission of heavy mechanical equipment, etc., it can work stably and reliably, and is less likely to be damaged or failed due to excessive load, thereby extending the service life of the equipment and reducing maintenance costs.

[0030] 2. The cross needle rollers of the present invention can maintain a stable spacing and distribution state under the positioning action of the retainer, and have high matching accuracy with the inner rotating track and the ball spline shaft. At the same time, the concentric design of the inner rotating track and the outer rotating track and the precise rolling fit of the ball groove and the ball body reduce axial movement and radial runout during rotation. In the field of precision machining, such as precision machine tool machining, optical instrument manufacturing and other industries with extremely high precision requirements, it can ensure machining accuracy, reduce product machining errors, improve product quality, and meet the needs of high-precision production.

[0031] 3. The utility model effectively constrains the cross needle rollers by the retaining frame, and designs multiple sets of annular grooves in the inner and outer rotating tracks, so that the entire device can maintain stable operation under high-speed rotation and high-load conditions, reducing the loosening, wear and failure of components caused by factors such as vibration and impact, reducing the failure rate of the equipment and improving production efficiency. At the same time, the stable operation state also helps to reduce noise generation, improve the working environment, and enhance the working comfort of operators. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1This is a perspective structural diagram of the utility model after being cut apart;

[0033] Figure 2 It is a schematic diagram of the three-dimensional structure of the utility model;

[0034] Figure 3 This is a schematic diagram of the three-dimensional structure of the cross needle roller bearing, connecting plate and outer connecting plate after being cut apart;

[0035] Figure 4 This is an exploded view of the components of the utility model after the external connecting plate is cut open.

[0036] In the figure: 1. Ball spline shaft; 11. Ball groove; 2. Ball spline nut body; 21. Ball body; 3. Cross needle roller bearing; 30. Cage; 31. Cross needle roller; 32. Inner rotating track; 33. Outer rotating track; 4. Connecting plate; 5. Outer connecting plate; 6. Mounting hole; 61. Docking hole. DETAILED DESCRIPTION

[0037] 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.

[0038] The following describes an embodiment of the present invention based on its overall structure.

[0039] The utility model provides a high-steel rotary needle roller spline, which aims to solve the shortcomings of existing rotary ball splines in load capacity, positioning accuracy and stability; its core innovation lies in the unique design and coordinated operation of components such as the ball spline shaft 1, the ball spline nut body 2 and the cross needle roller bearing 3.

[0040] High steel type rotating needle roller spline, such as Figure 1 - Figure 4 As shown, the high-steel rotary needle roller spline mainly consists of a ball spline shaft 1 and a ball spline nut body 2;

[0041] The ball spline nut 2 is made of a high-rigidity material. This choice gives the entire rotating needle roller spline high rigidity and strength, enabling it to withstand greater torque and load. Under high-load conditions, the high-rigidity material can effectively reduce deformation, ensuring the accuracy and stability of the device, further improving the performance and reliability of the device, extending its service life, and meeting the demand for high-precision, high-load, and high-stability rotating transmission components in modern mechanical engineering.

[0042] Specifically, a cross needle roller bearing 3 is provided on the ball spline nut body 2, and the cross needle roller bearing 3 includes a retaining frame 30, a cross needle roller 31, an inner rotating track 32 and an outer rotating track 33. The retaining frame 30 is rotatably connected to the ball spline nut body 2, and a cross needle roller 31 is rotatably installed in the retaining frame 30. The cross needle roller 31 is installed between the inner rotating track 32 and the outer rotating track 33 through the retaining frame 30. The ball spline shaft 1 and the ball spline nut body 2 realize relative rotational motion through the cross needle roller bearing 3, and the ball spline shaft 1 is in contact with the cross needle roller 31. In addition, the outer wall of the cross needle roller bearing 3 is rotatably connected to an external connecting plate 5 for connecting to external equipment. The outer wall of the retaining frame 30 is also installed with a connecting plate 4, and a group of external connecting plates 5 are connected to the upper and lower ends of the connecting plate 4. Various connection methods with external components are realized through the connecting plate 4 and the external connecting plate 5, thereby enhancing the versatility and functionality of the entire device.

[0043] In this embodiment, a ball groove 11 is specifically provided on the ball spline shaft 1, and the ball groove 11 rolls with the ball body 21 provided in the ball spline nut body 2. This design allows the ball body 21 to roll in the ball groove 11 during rotation, which can effectively transmit torque and ensure the smoothness of the relative movement between the ball spline shaft 1 and the ball spline nut body 2, reducing friction and wear, and improving the transmission efficiency and the service life of the device.

[0044] The inner rotating track 32 in this embodiment is arranged on the outer wall of the ball spline nut body 2, and its shape is adapted to the cross needle roller 31, ensuring that the cross needle roller 31 rolls stably in the inner rotating track 32. The outer rotating track 33 is arranged on the outer wall of the outer connecting plate 5, and the outer rotating track 33 is concentrically arranged with the inner rotating track 32. The outer rotating track 33 and the inner rotating track 32 are both designed with annular grooves, and are both provided with multiple groups. This design of multiple groups of concentric annular grooves allows the cross needle roller 31 to be evenly stressed between the inner and outer rotating tracks 33, thereby improving the load-bearing capacity and stability of the entire rotating needle roller spline, and can effectively disperse pressure when subjected to large loads, reduce stress concentration, and ensure reliable operation of the device.

[0045] For example, multiple groups of positioning cross needle rollers 31 are installed at equal angles on the retaining frame 30. The structural design enables the cross needle rollers 31 to maintain a stable spacing and distribution state during operation. The longitudinal section of the cross needle rollers 31 is a diamond design, and the cross section is a circular design. The diamond longitudinal section design enables the cross needle rollers 31 to better disperse stress when subjected to radial and axial forces, thereby improving their impact resistance and load-bearing capacity; the circular cross section design ensures the smoothness of the cross needle rollers 31 during the rolling process, reduces friction resistance, and further improves the transmission efficiency. The reasonable layout and positioning of the cross needle rollers 31 by the retaining frame 30 ensures that the cross needle rollers 31 can work stably under high-speed rotation and high-load conditions, without movement, jamming, etc., thereby improving the accuracy and reliability of the entire rotating needle roller spline.

[0046] In this embodiment, multiple groups of docking holes 61 corresponding to the mounting holes 6 are provided on the connecting plate 4. At the same time, multiple groups of mounting holes 6 are provided at equal angles on the external connecting plate 5. Through the cooperation of the mounting holes 6 and the docking holes 61, bolts and other connecting parts can be used to firmly connect the connecting plate 4, the external connecting plate 5 and the external components to realize power transmission or positioning functions. This connection method is not only convenient and fast, but also can ensure the accuracy and reliability of the connection, which is convenient for installation and use in different mechanical systems, thereby improving the applicability and compatibility of the entire device.

[0047] The working principle of the present invention is as follows: when the external power drives the ball spline shaft 1 to rotate, the ball spline shaft 1 rolls with the ball body 21 in the ball spline nut body 2 through the ball groove 11, and transmits the torque to the ball spline nut body 2. At the same time, the ball spline shaft 1 cooperates with the cross needle roller 31 in the cross needle roller bearing 3 through the ball spline nut body 2, driving the cross needle roller 31 to roll in the inner rotating track 32. Since the cross needle roller 31 maintains a stable spacing and distribution state through the cage 30, and the inner rotating track 32 is concentric with the outer rotating track 33, the cross needle roller 31 is rotated in the inner rotating track 32. The needle 31 can be evenly stressed during the rolling process, which improves the accuracy of rotation and also improves the load capacity. In this process, the precise coordination and stable operation between the various components ensure the realization of high load capacity, high-precision positioning and high stability. For example, in the spindle transmission system of a machine tool, the motor drives the ball spline shaft 1 to rotate, and the power is transmitted to the spindle through the rotating needle roller spline of the utility model to realize the precise processing movement of the tool; in the conveying mechanism of an automated production line, the rotating needle roller spline can transmit power from the drive motor to the conveying roller to ensure smooth conveying of materials.

[0048] 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. High steel type rotary needle roller spline, characterized by: It comprises a ball spline shaft (1) and a ball spline nut body (2); The ball spline nut body (2) is provided with a cross needle roller bearing (3), and the outer wall of the cross needle roller bearing (3) is rotatably connected to an external connection plate (5) for connection with external equipment; The cross needle roller bearing (3) comprises a retainer (30), a cross needle roller (31), an inner rotating track (32) and an outer rotating track (33); the retainer (30) is rotatably connected to the ball spline nut body (2); a cross needle roller (31) is rotatably mounted in the retainer (30); the cross needle roller (31) is mounted between the inner rotating track (32) and the outer rotating track (33) through the retainer (30); and the ball spline shaft (1) and the ball spline nut body (2) achieve relative rotational motion through the cross needle roller bearing (3).

2. The high-steel rotary needle roller spline according to claim 1, characterized in that: A ball groove (11) is provided on the ball spline shaft (1), and the ball groove (11) is in rolling engagement with a ball body (21) provided in the ball spline nut body (2).

3. The high-steel rotary needle roller spline according to claim 1, characterized in that: The inner rotating track (32) is arranged on the outer wall of the ball spline nut body (2), and the shape of the inner rotating track (32) is adapted to the cross needle roller (31).

4. The high-steel rotary needle roller spline according to claim 1, characterized in that: The outer rotating track (33) is arranged on the outer wall of the outer connecting disk (5), and the outer rotating track (33) and the inner rotating track (32) are arranged concentrically.

5. The high-steel rotary needle roller spline according to claim 1, characterized in that: The outer rotating track (33) and the inner rotating track (32) are both designed as annular grooves, and multiple groups of the outer rotating track (33) and the inner rotating track (32) are provided.

6. The high-steel rotary needle roller spline according to claim 1, characterized in that: A plurality of groups of positioning cross needle rollers (31) are mounted at equal angles on the retaining frame (30), and the structural design of the retaining frame (30) enables the cross needle rollers (31) to maintain a stable spacing and distribution state during operation.

7. The high-steel rotary needle roller spline according to claim 1, characterized in that: The longitudinal section of the cross needle roller (31) is designed to be diamond-shaped, and the cross section of the cross needle roller (31) is designed to be circular.

8. The high-steel rotary needle roller spline according to claim 7, characterized in that: A connecting plate (4) is installed on the outer wall of the retaining frame (30), and a group of external connecting plates (5) are connected to both upper and lower ends of the connecting plate (4).

9. The high-steel rotary needle roller spline according to claim 8, characterized in that: The outer connection plate (5) is provided with a plurality of mounting holes (6) at equal angles, and the connection plate (4) is provided with a plurality of docking holes (61) corresponding to the mounting holes (6).

10. The high-steel rotary needle roller spline according to claim 1, characterized in that: The ball spline nut body (2) is made of a high-rigidity material.

Images