A type of motor with universal shaft adjustment

Abstract

This utility model discloses a motor with a universally adjustable shaft, belonging to the field of motor technology. It includes a motor body and a universal joint head, which consists of a universal ball cover, a limiting ring, a star-shaped body, and an output shaft. The front end of the drive shaft has a first connecting spline, and the rear end has a connecting through hole. The universal ball cover is fixed to the drive shaft by connecting bolts, and its internal spherical cavity has an outer raceway. The limiting ring has a limiting ball groove and nests universal adjusting balls. The star-shaped body has an inner raceway, which cooperates with the universal adjusting balls and the outer raceway to form a rolling channel. The output shaft is connected to the star-shaped body by a spline. Universal adjustment of the output shaft is achieved by the rolling of six universal adjusting balls within the inner and outer raceways, and the drum-shaped structure of the limiting ring prevents axial displacement. This utility model achieves universal adjustment of the output shaft and has the advantages of a simple and compact structure, stable and reliable transmission, easy disassembly and maintenance, and high transmission efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of motor technology, and specifically relates to a motor with a universally adjustable shaft. Background Technology

[0002] An electric motor is an electromagnetic device that converts or transmits electrical energy based on the law of electromagnetic induction. Its working principle involves using the stator windings to generate a rotating magnetic field, which acts on the rotor to create a magnetoelectric torque. This torque is then transmitted to the motor's working shaft for output. Typically, the motor's working shaft is unique and fixed in direction. This presents limitations in many applications requiring flexible adjustment of the power output direction, such as in automated equipment, robot joints, and complex mechanical transmission systems, where the motor needs to output power at different angles to achieve complex motion trajectories.

[0003] Therefore, patent CN101867252A discloses a universal angle-adjustable motor, including a motor body and a mounting bracket. The motor body includes a front cover fixed to the front end of its housing. The bottom of the front cover is disc-shaped, and its outer circumference is joined to the mounting bracket with a spherical convex-concave curved surface. Four symmetrically distributed universal adjustment mechanisms are provided between the mounting bracket and the bottom of the front cover. Each universal adjustment mechanism includes an adjustment block with a convex curved surface screwed into the mounting bracket by adjustment bolts. The adjustment block is located at the bottom of the front cover, and the bottom edge of the front cover has an annular flange that abuts against the adjustment block. This patent achieves universal angle adjustment through the rotational movement of four adjustment bolts. This four-point coordinated adjustment method has a relatively complex structure. Damage to a single adjustment bolt can cause the overall universal adjustment to jam and reduce the accuracy of the adjustment angle. The production and maintenance costs are high, which has limitations. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems in the existing technology by providing a motor with a universally adjustable shaft.

[0005] The objective of this utility model can be achieved through the following technical solution: a motor with a universally adjustable shaft, comprising a motor body and a universal shaft head;

[0006] The motor body extends into a drive shaft. A first connecting spline is formed at the front end of the drive shaft, and connecting end faces are milled on opposite sides of the rear end of the drive shaft. A connecting through hole is formed between the two connecting end faces inside the drive shaft.

[0007] The universal joint head includes a universal spherical cover, a limiting ring, a star-shaped body, and an output shaft. The universal spherical cover has a bell-shaped structure on the outside and a spherical inner cavity inside. The inner cavity wall has several hemispherical outer raceways evenly distributed around it. The universal spherical cover extends backward toward the drive shaft to form a connecting cylinder. The inner wall of the connecting cylinder has a first spline hole that matches the first connecting spline. The tail end of the connecting cylinder has positioning holes on both sides of the cylinder wall corresponding to the central axis of the connecting through hole. A connecting bolt extends from one positioning hole, passes through the connecting through hole, and extends out into the other positioning hole, thereby fixing the universal spherical cover to the drive shaft.

[0008] The limiting ring and the star-shaped body are nested and installed in the spherical inner cavity of the universal ball cover. The limiting ring is drum-shaped and has several limiting ball grooves evenly distributed around it. The outer wall of the star-shaped body has several inner raceways with hemispherical cross sections evenly distributed around it. Each limiting ball groove is equipped with a universal adjusting ball, which rolls and adjusts within the channel formed by the outer raceway and the inner raceway. The center of the star-shaped body has a second spline hole, and a second connecting spline is formed on the end of the output shaft. The second spline hole and the second connecting spline are correspondingly matched, so that the final output shaft of the motor can achieve universal adjustment of the angle and output torque through the overall structure of the universal shaft head.

[0009] In the aforementioned type of universally adjustable motor, the number of the outer raceway of the universal ball cover, the limiting ball groove on the limiting ring, the inner raceway of the star-shaped body, and the universal adjusting ball are all the same, and should be no less than 3, preferably 6.

[0010] In the aforementioned type of motor with universal shaft adjustment, the limiting ring is generally in the form of a drum-shaped ring structure, and the outer side wall of the star-shaped body is also in the form of a drum-shaped structure. The drum-shaped structure makes it difficult for the star-shaped body, the limiting ring, and the universal spherical cover to move forward or backward when nested together.

[0011] In the aforementioned type of universally adjustable motor, the spline connection between the connecting cylinder of the universal spherical cover and the drive shaft, and between the output shaft and the star body, can be replaced by a key connection, a pin connection, or an interference fit connection.

[0012] Compared with existing technologies, the universally adjustable motor provided by this utility model realizes the universal adjustment of the output shaft, which greatly improves the applicability of the motor in complex application scenarios. Through the adjustment and cooperation of multiple universal adjustment balls in the limiting ball groove, inner raceway and outer raceway, the universal adjustment function is realized while ensuring the stability and reliability of the motor transmission. The bolt connection makes it convenient to disassemble and maintain the motor body and the universal shaft head. Compared with existing technologies, the structure is simple and compact, the production cost is low and the transmission efficiency is high. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a motor with universal adjustment for this shaft;

[0014] Figure 2 This is an exploded view and a partial enlarged view of the structure of the universally adjustable motor.

[0015] Figure 3 This is a longitudinal sectional view of the structure of a motor with universal adjustable shaft;

[0016] Figure 4 This is a cross-sectional view of the structure of a motor with universal adjustable shaft;

[0017] In the above figure, 100 is the motor body; 110 is the drive shaft; 111 is the first connecting spline; 112 is the connecting end face; 113 is the connecting through hole; 200 is the universal joint head; 210 is the universal ball cover; 211 is the outer raceway; 212 is the connecting cylinder; 213 is the positioning hole; 214 is the connecting bolt; 215 is the first spline hole; 220 is the limiting ring; 221 is the limiting ball groove; 230 is the star-shaped body; 231 is the inner raceway; 232 is the second spline hole; 240 is the universal adjusting ball; 250 is the output shaft; and 251 is the second connecting spline. Detailed Implementation

[0018] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0019] like Figures 1 to 4 As shown, the universally adjustable motor includes a motor body 100 and a universal joint head 200. The motor body 100 extends to a drive shaft 110. The front end of the drive shaft 110 is machined with a first connecting spline 111, and the two rear ends are milled flat to form symmetrical connecting end faces 112. A connecting through hole 113 is opened through the drive shaft 110 between the two connecting end faces. The universal joint head 200 is composed of a universal ball cover 210, a limiting ring 220, a star-shaped body 230, and an output shaft 250.

[0020] like Figures 2 to 4As shown, the universal spherical cover 210 has a bell-shaped external structure and a spherical inner cavity. The inner cavity wall has several hemispherical outer raceways 211 evenly distributed around it. The universal spherical cover 210 extends backward toward the drive shaft 110 to form a connecting cylinder 212. The inner side wall of the connecting cylinder 212 has a first spline hole 215 that corresponds to the first connecting spline 111. The tail end of the connecting cylinder 212 has positioning holes 213 on both sides of the cylinder wall corresponding to the central axis of the connecting through hole 113. A connecting bolt 214 extends from one side of the positioning hole 213, passes through the connecting through hole 113 and extends out into the other side of the positioning hole 213, thereby fixing the universal spherical cover 210 to the drive shaft 110.

[0021] The limiting ring 220 and the star-shaped body 230 are nested within the spherical inner cavity of the universal ball cover 210. The limiting ring 220 is generally drum-shaped, with several limiting ball grooves 221 evenly distributed around its circumference. The outer wall of the star-shaped body 230 has several hemispherical inner raceways 231 evenly distributed around its circumference. Each limiting ball groove 221 contains a universal adjusting ball 240, which rolls and adjusts within the channel formed by the outer raceway 211 and the inner raceway 231. The number of the outer raceway 211 of the universal ball cover 210, the limiting ball grooves 221 on the limiting ring 220, the inner raceways 231 of the star-shaped body 230, and the universal adjusting balls 240 are all the same, and should be no less than three to maintain stability; preferably six.

[0022] The center of the star-shaped body has a second spline hole 232, and a second connecting spline 251 is formed on the shaft end of the output shaft 250. The second spline hole 232 and the second connecting spline 251 are correspondingly engaged, so that the final output shaft 250 of the motor can achieve universal adjustment of the angle and output torque through the overall structure of the universal joint head 200.

[0023] In this utility model, the assembly steps of the universal joint head 200 are as follows: First, the universal ball cover 210 is sleeved onto the front end of the drive shaft 110 through the connecting sleeve 212, and the first spline hole 215 on the inner side of the connecting sleeve 212 engages with the first connecting spline 111; then, the connecting bolt 214 is inserted from the positioning hole 213 on one side of the connecting sleeve 212, passes through the connecting through hole 113 of the drive shaft 110, and extends out from the positioning hole 213 on the other side to lock, thereby achieving a rigid connection between the universal ball cover 210 and the drive shaft 110; then... Six universal adjusting balls 240 are embedded in the limiting ball grooves 221 of the limiting ring 220. Then, the limiting ring 220 and the star-shaped body 230 are nested into the spherical inner cavity of the universal ball cover 210. At this time, the universal adjusting balls 240 are located in the hemispherical channel formed by the outer raceway 211 of the universal ball cover 210 and the inner raceway 231 of the star-shaped body 230. Finally, the second connecting spline 251 at the front end of the output shaft 250 is inserted into the second spline hole 232 of the star-shaped body 230 to complete the assembly of the power transmission path.

[0024] Therefore, the working principle of this utility model is as follows: the motor body 100 drives the drive shaft 110 to rotate, and the torque is transmitted to the universal ball cover 210 through the spline connection. Then, the universal adjusting ball 240 drives the star-shaped body 230 to rotate, and finally the output shaft 250 outputs power. When the output shaft 250 deflects at an angle, the universal adjusting ball 240 rolls adaptively in the hemispherical channel to maintain the continuity of torque transmission.

[0025] To further explain, the limiting ring 220 has an overall drum-shaped ring structure, and the outer side wall of the star-shaped body 230 also has a drum-shaped structure. When the output shaft 250 deflects, the star-shaped body 230 drives the universal adjusting ball 240 to roll in the channel between the outer raceway 211 and the inner raceway 231. The drum-shaped structure of the limiting ring 220 restricts axial displacement and realizes universal angle adjustment within a range of ±15°. The drum-shaped outer wall of the limiting ring 220 and the spherical inner cavity of the star-shaped body 230 match, making it difficult for the components to move forward or backward when they are axially nested.

[0026] To further explain, the spline connection between the connecting cylinder 212 of the universal ball cover 210 and the drive shaft 110, and between the output shaft 250 and the star body 230, can be replaced with a key connection, a pin connection, or an interference fit to adapt to different torque requirements.

[0027] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0028] Although this document uses a variety of terms, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

Claims

1. A motor with a shaft that can be adjusted in all directions, comprising a motor body (100) and a universal shaft head (200); characterized in that, The motor body (100) extends into a drive shaft (110). A first connecting spline (111) is formed at the front end of the drive shaft (110). Connecting end faces (112) are milled on opposite sides of the surface of the drive shaft (110) at the rear end. A connecting through hole (113) is formed between the two connecting end faces (112) inside the drive shaft (110). The universal joint head (200) sequentially includes a universal spherical cover (210), a limiting ring (220), a star-shaped body (230), and an output shaft (250). The universal spherical cover (210) has a bell-shaped structure on the outside and a spherical inner cavity inside. Several hemispherical outer raceways (211) are evenly distributed around the inner cavity wall. The universal spherical cover (210) extends backward toward the drive shaft (110) to form a connecting cylinder (212). 2) The inner side wall is provided with a first spline hole (215) that corresponds to the first connecting spline (111). The tail end of the connecting cylinder (212) is provided with positioning holes (213) on both sides of the cylinder wall corresponding to the central axis of the connecting through hole (113). A connecting bolt (214) extends from one side positioning hole (213), passes through the connecting through hole (113) and extends out into the other side positioning hole (213), thereby fixing the universal ball cover (210) to the drive shaft (110). The limiting ring (220) and the star-shaped body (230) are nested and installed in the spherical inner cavity of the universal spherical cover (210). The limiting ring (220) is generally drum-shaped, with several limiting ball grooves (221) evenly opened on its circumferential direction. The outer wall of the star-shaped body (230) has several inner raceways (231) with hemispherical cross-sections evenly opened on its circumferential direction. Each of the limiting ball grooves (221) is equipped with a universal adjusting ball (240). Rolling adjustment is performed in the channel formed by the outer raceway (211) and the inner raceway (231); a second spline hole (232) is provided in the center of the star-shaped body, and a second connecting spline (251) is formed on the shaft end of the output shaft (250). The second spline hole (232) and the second connecting spline (251) are correspondingly matched, so that the final output shaft (250) of the motor can achieve universal adjustment of the angle and output torque through the overall structure of the universal joint head (200).

2. An electric machine with shaft-adjustable orientation according to claim 1, characterized in that, The number of the outer raceway (211) of the universal spherical cover (210), the limiting ball groove (221) on the limiting ring (220), the inner raceway (231) of the star-shaped body (230), and the universal adjusting ball (240) are all the same, and should be no less than 3, preferably 6.

3. An electric motor with shaft adjustable universal, according to claim 1, characterized in that, The limiting ring (220) has an overall drum-shaped ring structure, and the outer side wall of the star-shaped body (230) also has a drum-shaped structure.

4. An electric machine with shaft universal adjustment according to claim 1, characterized in that, The spline connection between the connecting cylinder (212) of the universal spherical cover (210) and the drive shaft (110), and between the output shaft (250) and the star body (230), can be replaced by a key connection, a pin connection, or an interference fit connection.

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