Ultrathin electromagnetic-mechanical hybrid one-way clutch

Abstract

The invention discloses an ultrathin electromagnetic-mechanical hybrid one-way clutch, and relates to the technical field of mechatronics. A penetrating hole is formed in the center of the groove bottom of the shell, the rotating body is placed in a groove of the shell in a clearance fit mode, the mechanism rotating shaft and the rotating body are coaxially connected for transmission, an L-shaped notch is machined in the edge of the rotating body and carries the self-locking module, the cylindrical roller is placed at the corner of the L-shaped notch, and the electromagnet is embedded in a short arm of the L-shaped notch. The springs are supported between the corners of the L-shaped notches and the cylindrical rollers, the electromagnets are started to magnetically attract and fix the cylindrical rollers, gaps are reserved between the cylindrical rollers and the inner wall of the groove of the shell, and the electromagnets are closed to enable the cylindrical rollers to be supported on the inner wall of the groove of the shell through the springs. The mechanism rotating shaft is combined with the rotating body to be matched with the inner wall of the groove of the shell, the L-shaped notch is formed in the edge of the rotating body, the self-locking module is carried, one-way clutch can be achieved without separating the driving shaft and the driven shaft, the part number and the axial thickness of the clutch are reduced, the structure is simple, and the size is small.

Description

Technical Field

[0001] The invention relates to the technical field of mechatronics, in particular to an ultra-thin electromagnetic-mechanical hybrid one-way clutch. Background Art

[0002] Conventional one-way clutches are generally provided with a driving shaft and a driven shaft, and a mechanical or electromechanical design is used between the two to realize the one-way clutch switching control between the driving shaft and the driven shaft, and the structure is relatively complex. Moreover, no matter how the switching is designed, it is difficult to further compress the axial thickness of the clutch due to the axial dimensions of the driving shaft and the driven shaft. For robot structure designs such as robot joints with strict axial dimension requirements, the current one-way clutch in the form of a master and slave shaft is difficult to apply. Therefore, it is urgent to design a simple and compact one-way clutch to solve the problem that the thickness of the existing one-way clutch cannot be further controlled. Summary of the invention

[0003] In order to solve the shortcomings of the background technology, the present invention provides an ultra-thin electromagnetic-mechanical hybrid one-way clutch, which cooperates with the inner wall of the groove of the shell through the mechanism shaft combined with the rotating body, an L-shaped notch is set on the edge of the rotating body and a self-locking module is installed, so that one-way clutch can be achieved regardless of the driving shaft and the driven shaft, the number of parts and the axial thickness of the clutch are simplified, the structure is simple, and the size is compact.

[0004] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: an ultra-thin electromagnetic-mechanical hybrid one-way clutch, comprising a mechanism shaft, a rotating body and a shell, wherein the shell is a circular groove-shaped component and a through hole is opened at the center of the bottom of the groove, the rotating body is a plate-shaped component and is placed in the groove of the shell, the mechanism shaft passes through the through hole of the shell axially and is coaxially connected to the rotating body for transmission, the edge contour of the rotating body is circular and a gap is left with the inner wall of the groove of the shell, and at the same time, an L-shaped notch is processed on the edge of the rotating body, and the L-shaped notch is equipped with a self-locking module, the self-locking module comprises a cylindrical roller, an electromagnet and a spring, the cylindrical roller is placed at the corner of the L-shaped notch, the electromagnet is embedded and fixed on the inner side of the short arm of the L-shaped notch, and the spring is supported between the corner of the L-shaped notch and the side wall of the cylindrical roller, when the electromagnet is turned on, the cylindrical roller is magnetically fixed so that a gap is left between it and the inner wall of the groove of the shell, and when the electromagnet is closed, the cylindrical roller is elastically supported on the inner wall of the groove of the shell through the spring.

[0005] Furthermore, more than two L-shaped notches are evenly processed on the edge of the rotating body, and all of the L-shaped notches are arranged rotationally symmetrically along the center of the rotating body.

[0006] Furthermore, a power source is embedded in the rotating body to supply power to the electromagnet, and the electromagnet is switched on and off in a wireless manner.

[0007] Furthermore, the mechanism shaft is detachably assembled and connected to the rotating body.

[0008] Furthermore, a special-shaped hole is opened at the center of the rotating body, and the assembly end of the mechanism shaft is processed into a shaft section whose cross section matches the special-shaped hole.

[0009] Furthermore, the special-shaped hole is a circular hole.

[0010] Furthermore, the mechanism shaft and the rotating body are integrated.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention cooperates with the inner wall of the groove of the housing through the mechanism shaft combined with the rotating body, an L-shaped notch is set on the edge of the rotating body and a self-locking module composed of a cylindrical roller, an electromagnet and a spring is carried. When the electromagnet is turned on, a gap is left between the cylindrical roller and the inner wall of the groove of the housing, which is an unlocked state. The mechanism shaft and the housing are independent of each other and do not affect each other. When the electromagnet is closed, the cylindrical roller contacts the inner wall of the groove of the housing under the action of the spring. During the period when the mechanism shaft drives the rotating body to rotate to one side, the short arm of the L-shaped notch contacts the cylindrical roller. The roller is supported and has little friction with the inner wall of the groove of the outer shell, which does not limit the relative rotation of the mechanism shaft and the outer shell. When the mechanism shaft drives the rotating body to rotate in the opposite direction, the long arm of the L-shaped notch squeezes the cylindrical roller against the inner wall of the groove of the outer shell to increase friction, so that the mechanism shaft drives the outer shell to rotate almost synchronously. There is no distinction between the driving shaft and the driven shaft, and one-way clutch is achieved only through the mechanism shaft, which greatly reduces the number of parts and axial thickness of the clutch, making the overall structure simpler and the size more compact, which is conducive to application in mechanical structures with high space requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the main structure of the one-way clutch of the present invention;

[0013] Figure 2 It is a schematic diagram of the top structure of the one-way clutch of the present invention.

[0014] In the figure: 1. mechanism shaft; 2. rotating body; 3. cylindrical roller; 4. electromagnet; 5. spring; 6. housing. DETAILED DESCRIPTION

[0015] The technical solution of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0016] like Figure 1-2As shown, an ultra-thin electromagnetic-mechanical hybrid one-way clutch includes a mechanism shaft 1, a rotating body 2 and a housing 6.

[0017] The shell 6 is a circular groove-shaped member and a perforation is provided at the center of the bottom of the groove for the introduction of the mechanism shaft 1. The rotating body 2 is a plate-shaped member and is placed in the groove of the shell 6. The mechanism shaft 1 passes through the perforation of the shell 6 in the axial direction and is coaxially connected with the rotating body 2 for transmission. The mechanism shaft 1 and the rotating body 2 can be made into one piece, or the mechanism shaft 1 and the rotating body 2 can be detachably assembled and connected according to the needs. For example, a special-shaped hole is provided in the center of the rotating body 2, and the assembly end of the mechanism shaft 1 is processed into a shaft section whose cross section matches the special-shaped hole, so that the mechanism shaft 1 and the rotating body 2 are plug-in connected, so that the mechanism shaft 1 can drive the rotating body 2 to rotate together. The special-shaped hole can adopt different hole structures such as a circular hole and a regular polygonal hole. Based on the fact that the mechanism shaft 1 is conventionally a circular shaft, it is appropriate to grind a plane on the assembly end of the mechanism shaft 1, and the special-shaped hole opened in the center of the rotating body 2 adopts a circular hole whose cross section matches it, so as to reduce the difficulty of processing.

[0018] In addition, the edge contour of the rotating body 2 is circular and leaves a gap with the inner wall of the groove of the outer shell 6. At the same time, the edge of the rotating body 2 is processed with an L-shaped notch, and the L-shaped notches are equipped with self-locking modules. In order to ensure structural balance and greater friction generated by the self-locking module, it is preferred that more than two L-shaped notches are evenly processed on the edge of the rotating body 2, and all L-shaped notches are arranged rotationally symmetrically along the center of the rotating body 2.

[0019] The self-locking module includes a cylindrical roller 3, an electromagnet 4 and a spring 5. The cylindrical roller 3 is placed at the corner of the L-shaped notch, the electromagnet 4 is embedded and fixed inside the short arm of the L-shaped notch, and the spring 5 is supported between the corner of the L-shaped notch and the side wall of the cylindrical roller 3.

[0020] The present invention designs a one-way clutch based on the electromagnet and self-locking principle. Different from the traditional clutch device, the present invention has no driving shaft and driven shaft, and only uses a single mechanism shaft 1 to achieve one-way clutch. The specific working principle is as follows: Figure 2 For reference, the following is explained:

[0021] The electromagnet 4 starts magnetic attraction to fix the cylindrical roller 3 so that there is a gap between it and the inner wall of the groove of the housing 6, which is the unlocked state. The mechanism shaft 1 and the housing 6 are independent of each other and do not affect each other. The mechanism shaft 1 can drive the rotating body 2 to rotate forward and reverse according to demand;

[0022] When the electromagnet 4 is closed, the cylindrical roller 3 is elastically supported on the inner wall of the groove of the housing 6 through the spring 5, wherein:

[0023] If the rotating body 2 rotates in the direction of the short arm of the L-shaped notch (i.e. Figure 2 During the rotation of the short arm, the cylindrical roller 3 is supported, and the cylindrical roller 3 is pushed to rotate with the rotating body 2. At this time, the force direction of the cylindrical roller 3 is along the circumferential direction, and the friction between the cylindrical roller 3 and the inner wall of the groove of the housing 6 is small, so self-locking cannot be achieved, and the relative rotation of the mechanism shaft 1 and the housing 6 will not be restricted;

[0024] If the rotating body 2 rotates in the direction of the long arm of the L-shaped notch (i.e. Figure 2 During the rotation of the long arm, the cylindrical roller 3 is squeezed against the inner wall of the groove of the housing 6 to increase the friction. At this time, the force of the cylindrical roller 3 is almost perpendicular to the contact surface, forming a self-locking, limiting the relative rotation between the mechanism shaft 1 and the housing 6. If the housing 6 is fixed, the mechanism shaft 1 cannot rotate. If the housing 6 is movable, the mechanism shaft 1 drives the housing 6 to rotate together.

[0025] In addition, considering that if the electromagnet 4 is connected to an external power source through wires, it is easy to cause the wires to be entangled during the rotation of the rotating body 2, a power supply can be embedded in the rotating body 2 to power the electromagnet 4, and the electromagnet 4 can be switched on and off wirelessly.

[0026] Through the above-mentioned one-way clutch structural design, the number of parts and axial thickness of the clutch are greatly reduced, making the overall structure simpler and the volume more compact, which is conducive to its application in robot joints, especially robot joints with strict axial dimension requirements.

[0027] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other forms of assembly without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations within the meaning and range of equivalents of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0028] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An ultra-thin electromagnetic-mechanical hybrid one-way clutch, characterized in that: The invention comprises a mechanism shaft (1), a rotating body (2) and a housing (6); the housing (6) is a circular groove-shaped component and a through hole is provided at the center of the bottom of the groove; the rotating body (2) is a plate-shaped component and is placed in the groove of the housing (6); the mechanism shaft (1) passes through the through hole of the housing (6) in the axial direction and is coaxially connected with the rotating body (2) for transmission; the edge profile of the rotating body (2) is circular and has a gap with the inner wall of the groove of the housing (6); at the same time, an L-shaped notch is processed on the edge of the rotating body (2); the L-shaped notch is equipped with a self-locking module; the The self-locking module comprises a cylindrical roller (3), an electromagnet (4) and a spring (5), wherein the cylindrical roller (3) is placed at the corner of the L-shaped notch, the electromagnet (4) is embedded and fixed on the inner side of the short arm of the L-shaped notch, and the spring (5) is supported between the corner of the L-shaped notch and the side wall of the cylindrical roller (3). When the electromagnet (4) is turned on, the cylindrical roller (3) is magnetically fixed so that a gap is left between it and the inner wall of the groove of the housing (6); when the electromagnet (4) is turned off, the cylindrical roller (3) is elastically supported on the inner wall of the groove of the housing (6) through the spring (5).

2. The ultra-thin electromagnetic-mechanical hybrid one-way clutch according to claim 1, characterized in that: The edge of the rotating body (2) is evenly processed with more than two L-shaped notches, and all of the L-shaped notches are arranged rotationally symmetrically along the center of the rotating body (2).

3. An ultra-thin electromagnetic-mechanical hybrid one-way clutch according to claim 1 or 2, characterized in that: A power source is embedded in the rotating body (2) to supply power to the electromagnet (4), and the electromagnet (4) is switched on and off in a wireless manner.

4. The ultra-thin electromagnetic-mechanical hybrid one-way clutch according to claim 3, characterized in that: The mechanism rotating shaft (1) is detachably assembled and connected to the rotating body (2).

5. The ultra-thin electromagnetic-mechanical hybrid one-way clutch according to claim 4, characterized in that: A special-shaped hole is provided at the center of the rotating body (2), and the assembly end of the mechanism rotating shaft (1) is processed into a shaft section whose cross section matches the special-shaped hole.

6. The ultra-thin electromagnetic-mechanical hybrid one-way clutch according to claim 5, characterized in that: The special-shaped hole is a circular hole.

7. The ultra-thin electromagnetic-mechanical hybrid one-way clutch according to claim 3, characterized in that: The mechanism rotating shaft (1) and the rotating body (2) are made as one body.

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