A bearing structure for a high-speed servo motor

Abstract

The utility model discloses a bearing structure for high -speed servo motor belongs to bearing technical field, and the bearing structure is characterized by including outer ring and inner race, the outer ring and inner race all are arranged ring hollow structure, the inside of outer ring is provided with first sliding rail, the outer surface of inner race is provided with second sliding rail, first sliding rail and second sliding rail are all arc groove structure, first sliding rail and second sliding rail inner wall are smooth, be provided with steel ball between first sliding rail and second sliding rail, the steel ball is provided with multiple groups, multiple steel ball and first sliding rail and second sliding rail rotatory connection, multiple steel ball is evenly distributed in ring, one side of steel ball is provided with first half retainer, the other side of steel ball is provided with second half retainer, and the device solves the current existing bearing structure mostly integrated design, the problem of difficult disassembly, cannot separately replace the wearing rolling body.

Description

Technical Field

[0001] This utility model belongs to the field of bearing technology, specifically relating to a bearing structure for a high-speed servo motor. Background Technology

[0002] With the rapid development of industrial automation and precision manufacturing, high-speed servo motors, due to their high precision, fast response, and high power density, are widely used in high-end applications such as industrial robot joint drives, precision machine tool spindles, and semiconductor manufacturing equipment. Bearings, as the core supporting component of high-speed servo motors, directly determine the motor's operating accuracy, stability, and service life.

[0003] Wear is inevitable under long-term high-speed operation. However, most existing bearing structures are integrated designs, which are difficult to disassemble and cannot replace worn rolling elements individually. The entire bearing must be replaced, which greatly increases maintenance costs. If worn rolling elements are not replaced in time, they will cause irreversible damage to the inner and outer ring slide rails, further amplifying the impact of the failure. This phenomenon has become a problem that urgently needs to be solved by people in this field. Utility Model Content

[0004] The purpose of this invention is to provide a bearing structure for a high-speed servo motor to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a bearing structure for a high-speed servo motor, including an outer ring and an inner ring, both of which are provided with an annular hollow structure. A first slide rail is provided inside the outer ring, and a second slide rail is provided on the outer surface of the inner ring. Both the first and second slide rails are arc-shaped groove structures, and the inner walls of the first and second slide rails are smooth.

[0006] The present invention further describes that a steel ball is provided between the first slide rail and the second slide rail, and multiple sets of the steel ball are provided. The multiple sets of the steel ball are rotatably connected to the first slide rail and the second slide rail, and the multiple sets of the steel ball are evenly distributed in a ring.

[0007] The present invention further describes that a first half-cage is provided on one side of the steel ball, and a second half-cage is provided on the other side of the steel ball.

[0008] The present invention further describes that the first half-cage has a rivet sliding connection inside, the second half-cage has multiple sets of threaded grooves inside, the first half-cage and the second half-cage are symmetrically arranged, and the first half-cage and the second half-cage are fastened together by rivets.

[0009] The present invention further illustrates that the first half-cage and the second half-cage are provided with arc-shaped pockets adapted to the steel ball on their respective inner sides, and the inner walls of the arc-shaped pockets are polished.

[0010] The present invention further illustrates that a positioning boss is fixedly connected to the side of the first half-cage near the second half-cage, and a positioning groove is fixedly connected to the side of the second half-cage near the first half-cage.

[0011] The present invention further illustrates that a positioning boss is fixedly connected to the side of the first half-cage near the second half-cage, and a positioning groove is fixedly connected to the side of the second half-cage near the first half-cage.

[0012] The present invention further explains that two sets of annular grooves are symmetrically formed on the inner wall of the outer ring, and sealing rings are provided inside the two sets of annular grooves.

[0013] Compared with the prior art, the beneficial effects achieved by this utility model are as follows: This utility model achieves core operation through the cooperation of coaxial slide rails with inner and outer rings and steel balls. The inner ring is adapted to the motor shaft, and the outer ring provides the installation reference. The collinearity of the first and second slide rails ensures the coaxiality of operation. Multiple sets of evenly distributed steel balls roll between the slide rails, converting the rotation of the shaft into rolling friction of the steel balls, reducing the running resistance. The cage assembly is precisely connected to the positioning boss and the groove, and is fastened with rivets to form a complete frame. The steel balls can also be replaced by disassembling the cage. Its polished arc-shaped pockets restrict the movement of the steel balls, ensuring rolling stability and running accuracy. The sealing ring in the outer ring annular groove is interference-fitted to form a sealing barrier, blocking the entry of external impurities, avoiding increased rolling resistance and component wear, and ensuring stability and service life under high-speed operation. Attached Figure Description

[0014] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the outer ring and sealing ring structure of this utility model; Figure 3 This is a schematic diagram of the inner ring and steel ball structure of this utility model; Figure 4 This is a front view schematic diagram of the first half-cage of this utility model; Figure 5 This is a front view schematic diagram of the second half retainer of this utility model; Figure 6This is a side view of the second half of the cage structure of this utility model; Figure 7 This is a side view of the first half-cage structure of this utility model; Figure 8 This is a schematic diagram of the rear sectional structure of the bearing of this utility model; Figure 9 This is a front view sectional view of the bearing structure of this utility model.

[0015] In the diagram: 1. Outer ring; 2. Inner ring; 3. First slide rail; 4. Second slide rail; 5. Steel ball; 6. First half-cage; 7. Second half-cage; 8. Rivet; 9. Threaded groove; 10. Arc-shaped pocket; 11. Positioning boss; 12. Positioning groove; 13. Annular groove; 14. Sealing ring. Detailed Implementation

[0016] The following detailed, non-limiting description of the present invention, in conjunction with preferred embodiments and accompanying drawings, is provided. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0017] Please see Figure 1-9 This utility model provides a technical solution: a bearing structure for a high-speed servo motor, including an outer ring 1 and an inner ring 2. Both the outer ring 1 and the inner ring 2 are provided with an annular hollow structure to adapt to the shaft installation requirements of the high-speed servo motor. A first slide rail 3 is provided inside the outer ring 1, and a second slide rail 4 is provided on the outer surface of the inner ring 2. Both the first slide rail 3 and the second slide rail 4 are arc-shaped groove structures. The inner walls of the first slide rail 3 and the second slide rail 4 are smooth, and their centers are collinear to ensure the coaxiality of the bearing during operation.

[0018] A steel ball 5 is provided between the first slide rail 3 and the second slide rail 4. There are multiple sets of steel balls 5, which are rotatably connected to the first slide rail 3 and the second slide rail 4. The multiple sets of steel balls 5 are evenly distributed in a ring.

[0019] A first half-cage 6 is provided on one side of the steel ball 5, and a second half-cage 7 is provided on the other side of the steel ball 5. A rivet 8 is slidably connected inside the first half-cage 6, and multiple sets of threaded grooves 9 are opened inside the second half-cage 7. The first half-cage 6 and the second half-cage 7 are symmetrically arranged and are fastened together by the rivet 8 to form a complete frame.

[0020] Meanwhile, when the steel ball 5 wears out, the rivet 8 can be disassembled by external force and specific tools, so that the steel ball 5 can be quickly disassembled and replaced, preventing the worn steel ball 5 from damaging the slide rail of the outer ring 1 and the inner wall of the inner ring 2.

[0021] Both the first half-cage 6 and the second half-cage 7 have arc-shaped pockets 10 that fit the steel ball 5 on their respective inner sides. The inner wall of the arc-shaped pocket 10 is polished to reduce the frictional resistance between the steel ball 5 and the inner wall of the pocket when the steel ball 5 rolls, avoid additional heat generation and wear, and ensure that the steel ball 5 rotates flexibly while preventing the steel ball 5 from moving around during high-speed operation, thus further ensuring the operation accuracy.

[0022] A positioning boss 11 is fixedly connected to the side of the first half-cage 6 near the second half-cage 7, and a positioning groove 12 is fixedly connected to the side of the second half-cage 7 near the first half-cage 6. When the first half-cage 6 and the second half-cage 7 are docked, the positioning boss 11 and the positioning groove 12 are slidably connected to form a precise positioning fit.

[0023] Two sets of annular grooves 13 are symmetrically opened on the inner wall of the outer ring 1, and sealing rings 14 are provided inside the two sets of annular grooves 13.

[0024] The sealing ring 14 is fixed with the annular groove 13 by interference fit, and its inner side forms a flexible contact seal with the outer surface of the inner ring 2, forming a sealing barrier on the inner and outer sides of the bearing. When the bearing is running at high speed, the sealing ring 14 can effectively prevent external dust, water vapor, oil and other impurities from entering the bearing, and avoid impurities from adhering to the surface of the steel ball 5, the first slide rail 3 and the second slide rail 4, which would lead to increased rolling resistance and aggravated wear.

[0025] Working principle: First, the outer ring 1 is the fixed support component of the bearing. The inner ring 2 is interference-fitted with the shaft of the high-speed servo motor and rotates synchronously with the shaft. The first slide rail 3 and the second slide rail 4 adopt an arc-shaped groove design with the center of the circle collinear. The second slide rail 4 on the outer surface of the inner ring 2 will drive the multiple sets of steel balls 5 in contact with it to roll. The other side of the steel ball 5 contacts the first slide rail 3 inside the outer ring 1, and its rolling motion is transmitted along the slide rail with the arc-shaped groove structure. The first half-cage 6 and the second half-cage 7 are pre-positioned by the precise docking of the positioning boss 11 and the positioning groove 12. Then, they are fastened by the rivet 8 and the threaded groove 9 to form a complete cage frame. When the steel ball 5 is worn, the rivet 8 can be disassembled by external force and a specific tool, so that the steel ball 5 can be quickly disassembled and replaced to prevent wear. The damaged steel ball 5 causes damage to the slide rails on the outer ring 1 and the inner wall of the inner ring 2. The arc-shaped pocket 10 on the inner side of the cage is precisely matched with the steel ball 5, and the inner wall of the arc-shaped pocket 10 is polished. This not only provides uniform ring-shaped positioning for multiple sets of steel balls 5, preventing the steel balls 5 from shifting or piling up due to centrifugal force during high-speed operation, ensuring consistent spacing between the steel balls 5, but also reduces the frictional resistance between the steel balls 5 and the arc-shaped pocket 10 when rolling, reducing heat generation and wear during operation, ensuring flexible rotation of the steel balls 5, and further improving the high-speed stability of the bearing. The inner side of the sealing ring 14 forms a flexible contact seal with the outer surface of the inner ring 2, building a sealing barrier between the bearing interior and the outside world. When the bearing rotates at high speed with the servo motor, this sealing structure can effectively prevent external dust, water vapor, oil and other impurities from entering the bearing interior.

[0026] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A bearing structure for a high-speed servo motor, comprising an outer ring (1) and an inner ring (2), characterized in that: Both the outer ring (1) and the inner ring (2) are provided with a ring-shaped hollow structure. The outer ring (1) has a first slide rail (3) inside, and the inner ring (2) has a second slide rail (4) on its outer surface. Both the first slide rail (3) and the second slide rail (4) are arc-shaped groove structures, and the inner walls of the first slide rail (3) and the second slide rail (4) are smooth.

2. The bearing structure for a high-speed servo motor according to claim 1, characterized in that: A steel ball (5) is provided between the first slide rail (3) and the second slide rail (4). There are multiple sets of the steel ball (5). The multiple sets of the steel ball (5) are rotatably connected to the first slide rail (3) and the second slide rail (4). The multiple sets of the steel ball (5) are evenly distributed in a ring.

3. The bearing structure for a high-speed servo motor according to claim 2, characterized in that: A first half-cage (6) is provided on one side of the steel ball (5), and a second half-cage (7) is provided on the other side of the steel ball (5).

4. The bearing structure for a high-speed servo motor according to claim 3, characterized in that: The first half-cage (6) has a rivet (8) slidingly connected inside, and the second half-cage (7) has multiple sets of threaded grooves (9) inside. The first half-cage (6) and the second half-cage (7) are symmetrically arranged and are fastened together by the rivet (8).

5. The bearing structure for a high-speed servo motor according to claim 4, characterized in that: The first half-cage (6) and the second half-cage (7) are provided with arc-shaped pockets (10) adapted to the steel ball (5) on their respective inner sides, and the inner walls of the arc-shaped pockets (10) are polished.

6. The bearing structure for a high-speed servo motor according to claim 5, characterized in that: The first half-cage (6) is fixedly connected to a positioning boss (11) on the side near the second half-cage (7), and the second half-cage (7) is fixedly connected to a positioning groove (12) on the side near the first half-cage (6).

7. The bearing structure for a high-speed servo motor according to claim 6, characterized in that: The inner wall of the outer ring (1) is symmetrically provided with two sets of annular grooves (13), and a sealing ring (14) is provided inside the two sets of annular grooves (13).

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