CN211288647U - Speed reducing mechanism with overload protection function - Google Patents
Speed reducing mechanism with overload protection function Download PDFInfo
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- CN211288647U CN211288647U CN201920944609.2U CN201920944609U CN211288647U CN 211288647 U CN211288647 U CN 211288647U CN 201920944609 U CN201920944609 U CN 201920944609U CN 211288647 U CN211288647 U CN 211288647U
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Abstract
The utility model provides a reduction gears with overload protection function, including eccentric shaft (1), shell (2), tightening means (3), cycloid wheel device, drive disk assembly (7) and epitheca (8), be provided with first non-eccentric section (14) and eccentric section on eccentric shaft (1), drive disk assembly (7) is connected in first non-eccentric section (14), and cycloid wheel device is connected in the eccentric section, and cycloid wheel device circumferential direction connects tightening means (3), and cycloid wheel device connects drive disk assembly (7), shell (2), epitheca (8) form a accommodation space after connecting, and eccentric shaft (1), tightening means (3), cycloid wheel device, drive disk assembly (7) all are located in the accommodation space, the motor is connected in eccentric shaft (1), and drive disk assembly (7) connect the load. The utility model has the advantages of simple and reasonable structure, not only can realize the adjustable of reduction structure drive ratio through tightening means, still possessed the overload protection function.
Description
Technical Field
The utility model relates to a decelerator field specifically relates to a reduction gears with overload protection function.
Background
The speed reducing mechanism is used as an important part of mechanical transmission and widely applied to the industries of robots, automobiles and the like. Conventional reduction mechanisms typically achieve reduction by two intermeshing gears of different diameters. When the load is too large, the external motor is easy to be incapable of rotating to generate the condition of current overload, so that the external motor is damaged.
The patent document CN 109538706a discloses a helical gear planetary wheel and ball combined speed reducer, which includes a planetary wheel speed reducing assembly and a ball speed reducing assembly, where the planetary wheel speed reducing assembly includes a first input shaft, a planetary carrier, a first housing, a first output disc and a plurality of helical gear wheels, and the ball speed reducing assembly includes a second input shaft, a second housing, a driving disc, a cycloid disc, a second output disc and a plurality of ellipsoidal balls. The utility model discloses utilize the rotation transmission motion of skewed tooth planet wheel and first ring gear, realize the one-level speed reduction to the motor, recycle the roll transmission motion of ellipsoid ball and cycloid rail groove, realize the second grade speed reduction to the motor, improve transmission efficiency, the friction when rolling friction when the ellipsoid ball rolls is littleer than when the gear engagement in traditional gear reducer, reduce the wearing and tearing loss, planet wheel speed reduction subassembly is all littleer with the transmission ratio error that ball speed reduction subassembly was compared in traditional gear reducer, reduce the transmission ratio error. But the design has no overload protection mechanism and is easy to damage the connected motor.
SUMMERY OF THE UTILITY MODEL
To the defect among the prior art, the utility model aims at providing a reduction gears with overload protection function.
According to the utility model provides a pair of reduction gears with overload protection function, including eccentric shaft, shell, tightening means, cycloid wheel device, drive disk assembly and epitheca, be provided with first non-eccentric section and eccentric section on the eccentric shaft, drive disk assembly is connected to first non-eccentric section, and cycloid wheel device is connected to eccentric section, cycloid wheel device circumferential connection tightening means, and cycloid wheel device connects drive disk assembly, form a accommodation space after shell, epitheca are connected, and eccentric shaft, tightening means, cycloid wheel device, drive disk assembly all are located in the accommodation space, eccentric shaft connection motor, drive disk assembly connect the load.
Preferably, one or more eccentric sections are arranged on the eccentric shaft, the centers of the eccentric sections are uniformly distributed in the circumferential direction with the center of the eccentric shaft as the center of a circle, and the distances from the centers of the eccentric sections to the center of the eccentric shaft are equal.
Preferably, the cycloid wheel device comprises one or more cycloid wheels, and the cycloid wheels are connected with the eccentric sections in a one-to-one correspondence manner;
the cycloidal gear comprises pin sleeves, a cycloidal wheel disc and a disc bearing, wherein one or more pin sleeves are arranged on the cycloidal wheel disc, the cycloidal wheel disc is connected with a transmission part through the pin sleeves, and the cycloidal wheel disc is connected with an eccentric section through the disc bearing and can freely rotate relative to the eccentric section;
the edge of the cycloid wheel disc is smooth, the cycloid wheel disc is connected with the tightening device through the edge, and the edge of the cycloid wheel disc is the edge of the cycloid wheel.
Preferably, the tightening device comprises an adjusting nut and a tightening surface, the tightening surface is one or more arc-shaped components, one or more bolts are arranged on the outer side of the tightening surface, the bolts are connected with the adjusting nut,
the tightening surfaces are uniformly distributed in the circumferential direction of the cycloid wheel device, and the tightening surfaces adjust the degree of the inner sides of the tightening surfaces to be attached to the edge of the cycloid wheel device through adjusting nuts.
Preferably, a friction surface made of a non-metallic material is arranged on the inner side of the clamping surface;
the torque between the friction surface and the edge of the cycloidal gear, which is generated by the maximum static friction force, can be adjusted by changing the friction coefficient of the friction surface and/or the edge of the cycloidal gear and the positive pressure applied by the friction surface to the edge of the cycloidal gear;
the motor works under the condition that the friction torque between the friction surface and the edge of the cycloidal gear is smaller than the torque generated by the maximum static friction force between the friction surface and the edge of the cycloidal gear.
Preferably, the transmission part comprises a driven bearing, an output shaft disc, a driven disc, a transmission pin and an output shaft, the driven disc is connected with a pin bush of the cycloidal gear device through the transmission pin and can rotate along with the cycloidal gear device, the driven disc is connected with the output shaft disc, the output shaft disc is connected with a first non-eccentric section through the driven bearing, the output shaft disc is provided with the output shaft, and the output shaft is connected with a load.
Preferably, the upper shell comprises an outer bearing, an end cover and a connecting piece, the end cover is connected with the shell through the connecting piece, and the middle part of the end cover is provided with an outer bearing mounting position and is connected with an output shaft of the transmission component through the outer bearing;
the end part of the shell is provided with a through hole through which the eccentric shaft passes, the circumferential direction of the through hole is provided with a bolt of the tightening device, and an adjusting nut of the tightening device is positioned on the circumferential surface of the shell and connected with the bolt of the tightening device positioned on the circumferential surface of the shell.
Preferably, the device further comprises an inner gear ring component, gear teeth are arranged on the edge of a cycloid wheel of the cycloid wheel device, and a second non-eccentric section is further arranged at one end of the eccentric shaft connected with the motor;
the inner gear ring component comprises a belt, an outer gear and a gear ring bearing, the outer gear is connected with the second non-eccentric section through the gear ring bearing and can rotate along with the eccentric shaft, and the belt is respectively connected with the outer gear and a cycloid wheel of the cycloid wheel device.
Preferably, the belt is an elastic non-metallic material belt, the inner ring of the belt is provided with gear teeth, the number of the gear teeth is equal to the number of teeth of the outer gear, the reference circle diameter of the gear teeth is equal to the reference circle diameter of the outer gear, and the belt is connected with the outer gear in a matching manner through the gear teeth and can rotate along with the outer gear.
Preferably, the tooth profile of the gear teeth on the edge of the cycloid wheel device is the same as that of the external gear, and the number of the gear teeth is smaller than the number of teeth of the external gear;
the cycloidal gear of the cycloidal gear device is connected with a belt in a matching way through gear teeth, the belt comprises a convex tooth surface, the cycloidal gear of the cycloidal gear device comprises a concave tooth surface, and the convex tooth surface is meshed with the concave tooth surface.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. the utility model has the advantages of simple and reasonable structure, not only can realize the adjustable of reduction structure drive ratio through tightening means, still possessed the overload protection function.
2. The utility model discloses a non-metallic material's belt has not only realized the high accuracy transmission, still has the low noise, need not lubricated and long-life characteristics, still has the overload protection function simultaneously.
3. The utility model can change the loading capacity of the speed reducing structure by changing the friction coefficient between the friction surface of the tightening surface and the edge of the cycloid wheel and the positive pressure applied by the tightening device to the edge of the cycloid wheel; through changing the coefficient of friction between the clamping surface and the belt, the positive pressure applied to the belt by the tightening device can change the load capacity which can be borne by the speed reducing structure.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
fig. 1 is a schematic diagram of an explosion structure according to an embodiment of the present invention.
Fig. 2 is a schematic structural view of the tightening device of the present invention.
Fig. 3 is a schematic diagram of an explosive structure according to another embodiment of the present invention.
Fig. 4 is a schematic cross-sectional structure diagram of another embodiment of the present invention.
Fig. 5 is a schematic view of the engagement relationship between the belt and the cycloid gear of the present invention.
The figures show that:
Detailed Description
The present invention will be described in detail with reference to the following embodiments. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that various changes and modifications can be made by one skilled in the art without departing from the spirit of the invention. These all belong to the protection scope of the present invention.
In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.
According to the utility model provides a pair of reduction gears with overload protection function, as shown in fig. 1-4, including eccentric shaft 1, shell 2, tightening means 3, cycloid wheel device, drive disk assembly 7 and epitheca 8, be provided with first non-eccentric section 14 and eccentric section on the eccentric shaft 1, drive disk assembly 7 is connected to first non-eccentric section 14, and the cycloid wheel device is connected to eccentric section, and cycloid wheel device circumference connects tightening means 3, and cycloid wheel device connects drive disk assembly 7, form a accommodation space after shell 2, epitheca 8 are connected, and eccentric shaft 1, tightening means 3, cycloid wheel device, drive disk assembly 7 all are located in the accommodation space, eccentric shaft 1 connects the motor, and drive disk assembly 7 connects the load.
The eccentric shaft 1 is provided with one or more eccentric sections, the centers of the eccentric sections are uniformly distributed in the circumferential direction with the center of the eccentric shaft 1 as the center of a circle, and the distances from the centers of the eccentric sections to the center of the eccentric shaft 1 are equal. Preferably, two eccentric sections are provided on the eccentric shaft 1: the eccentric shaft comprises a first eccentric section 12 and a second eccentric section 13, wherein the centers of the first eccentric section 12 and the second eccentric section 13 form an included angle of 180 degrees relative to the center of the eccentric shaft 1.
The cycloid wheel device comprises one or more cycloid wheels, and the cycloid wheels are connected with the eccentric sections in a one-to-one correspondence mode. The cycloidal gear comprises a pin sleeve, a cycloidal wheel disc and a disc bearing, wherein one or more pin sleeves are arranged on the cycloidal wheel disc, the cycloidal wheel disc is connected with a transmission part 7 through the pin sleeve, and is connected with an eccentric section through the disc bearing and can freely rotate relative to the eccentric section, namely the cycloidal gear can freely rotate (autorotate) around the center of the cycloidal gear; as shown in fig. 1, the edge of the cycloid wheel disk is smooth, the cycloid wheel disk is connected with the tightening device 3 through the edge, and the edge of the cycloid wheel disk is the edge of the cycloid wheel. Preferably, the cycloid gear arrangement comprises two cycloid gears: a first cycloid gear 5, a second cycloid gear 6; the first cycloid wheel 5 comprises a first pin sleeve 51, a first cycloid wheel 52 and a first disc bearing 53, the first cycloid wheel 52 is provided with the first pin sleeve 51, the first cycloid wheel 52 is connected with the transmission part 7 through the first pin sleeve 51, and the first cycloid wheel 52 is connected with the first eccentric section 12 through the first disc bearing 53 and can freely rotate relative to the first eccentric section 12; the second cycloid wheel 6 comprises a second pin sleeve 61, a second cycloid wheel disc 62 and a second disc bearing 63, the second cycloid wheel disc 62 is provided with the second pin sleeve 61, the second cycloid wheel disc 62 is connected with the transmission part 7 through the second pin sleeve 61, and the second cycloid wheel disc 62 is connected with the second eccentric section 13 through the second disc bearing 63 and can freely rotate relative to the second eccentric section 13.
The tightening device 3 comprises an adjusting nut 31 and a tightening surface 32, the tightening surface 32 is one or more arc-shaped components, one or more bolts are arranged on the outer side of the tightening surface 32 and connected with the adjusting nut 31, the tightening surface 32 is uniformly distributed on the circumference of the cycloid wheel device, and the tightening surface 32 adjusts the degree of the inner side of the tightening surface to be attached to the edge of the cycloid wheel device through the adjusting nut 31. A friction surface 33 made of a non-metal material is arranged on the inner side of the clamping surface 32; the torque between the friction surface 33 and the edge of the cycloidal gear, which torque is generated by the maximum static friction force, can be adjusted by changing the friction coefficient of the friction surface 33 and/or the edge of the cycloidal gear and the positive pressure applied to the edge of the cycloidal gear by the friction surface 33; the motor operates in a situation where the friction torque between the friction surface 33 and the edge of the cycloid wheel is less than the torque generated by the maximum static friction between the two.
The transmission component 7 comprises a driven bearing 71, an output shaft disc 72, a driven disc 73, a transmission pin 74 and an output shaft 75, the driven disc 73 is connected with a pin sleeve of the cycloidal gear device through the transmission pin 74 and can rotate along with the cycloidal gear device, the driven disc 73 is connected with the output shaft disc 72, the output shaft disc 72 is connected with the first non-eccentric section 14 through the driven bearing 71, the output shaft disc 72 is provided with the output shaft 75, and the output shaft 75 is connected with a load. The rotation of the eccentric shaft 1 is not transmitted to the output shaft disc 72 through the driven bearing 71, i.e. the output power of the transmission part 7 is provided only by the rotation of the cycloid wheel.
The upper shell 8 comprises an outer bearing 81, an end cover 82 and a connecting piece 83, the end cover 82 is connected with the shell 2 through the connecting piece 83, the middle part of the end cover 82 is provided with an installation position of the outer bearing 81 and is connected with the output shaft 75 of the transmission part 7 through the outer bearing 81; the end of the housing 2 is provided with a through hole through which the eccentric shaft 1 passes, and circumferentially with a through hole through which a bolt of the tightening device 3 passes, and the adjusting nut 31 of the tightening device 3 is located on the circumferential surface of the housing 2 and is connected to the bolt of the tightening device 3 located on the circumferential surface of the housing 2.
As shown in fig. 3-5, the device further comprises an inner gear ring component 4, gear teeth are arranged on the edge of the cycloid gear device, and a second non-eccentric section 11 is arranged at one end of the eccentric shaft 1 connected with the motor; the ring gear member 4 includes a belt 41, an outer gear 42, and a ring gear bearing 43, the outer gear 42 is connected to the second non-eccentric section 11 through the ring gear bearing 43 and is rotatable with the eccentric shaft 1, and the belt 41 is connected to the outer gear 42 and the cycloid gear of the cycloid gear device, respectively. The belt 41 is an elastic non-metallic material belt, the inner ring of the belt 41 is provided with gear teeth, the number of the gear teeth is equal to the number of the teeth of the outer gear 42, the reference circle diameter of the gear teeth is equal to the reference circle diameter of the outer gear 42, and the belt 41 is connected with the outer gear 42 in a matching mode through the gear teeth and can rotate along with the outer gear 42. The tooth form of the gear teeth on the edge of the cycloid wheel device is the same as that of the external gear 42, and the number of the gear teeth is smaller than that of the external gear 42; the cycloidal gear of the cycloidal gear device is connected with the belt 41 in a matching way through gear teeth, the belt 41 comprises a convex tooth surface 411, the cycloidal gear of the cycloidal gear device comprises a concave tooth surface 621, and the convex tooth surface 411 is meshed with the concave tooth surface 621. The torque between the belt 41 and the gripping surface 32 resulting from the maximum static friction can be adjusted by varying the coefficient of friction of the belt 41 and the positive pressure exerted by the gripping surface 32 on the belt 41; the motor operates in a situation where the frictional torque between the belt 41 and the gripping surface 32 is less than the torque generated by the maximum static friction.
When the edge of the cycloid wheel is smooth:
the cycloid gear is eccentrically rotated by the eccentric shaft 1, the cycloid gear is rotated by a frictional force (transmission force) generated by the friction between the edge of the cycloid gear and the friction surface 33 or the tightening surface 32 of the tightening device during eccentric rotation, and the rotation is transmitted to the output shaft 75 of the transmission component 7 through the transmission pin 74, the magnitude of the frictional force can be adjusted by a tightening force provided by the tightening device 3, and the tightening force is adjusted by the adjusting nut 31. Of course, the friction force is also related to the friction coefficient between the edge of the cycloid wheel and the friction surface 33 or the tightening surface 32 of the tightening device, and the friction coefficient is related to the materials of two contact objects and the roughness of the contact surface, so that the transmission ratio of the speed reducing mechanism can be adjusted by adjusting the factors influencing the friction force. The motor works under the condition that the friction torque between the friction surface 33 or the hooping surface 32 and the edge of the cycloidal gear is smaller than the torque generated by the maximum static friction force between the friction surface and the edge of the cycloidal gear; when overload occurs, namely the load torque exceeds the torque generated by the maximum static friction force between the friction surface 33 or the tightening surface 32 and the edge of the cycloidal gear, the cycloidal gear slips to perform overload protection, and the motor stops working.
When the edge of the cycloid wheel is provided with gear teeth:
use belt 41 and external gear 42 to construct a novel ring gear structure, replace traditional metal ring gear or pin tooth, make the utility model discloses outside having inherited the high accuracy transmission of traditional cycloid pinwheel speed reducer, characteristics such as bidirectional drive, still can realize certain overload protection function to have low noise, need not lubricated and long-life characteristics. This case has a double overload protection function and, based on the design of tightening device 3, enables a transmission ratio to be adjusted.
The first protection mechanism is inner gear ring component 4 sliding protection, and the working principle is as follows:
the belt 41 is selected to be a non-metallic material with a certain elasticity, the tightness of the contact fit between the tightening surface 32 and the belt 41 is adjusted by rotating the adjusting nut 31, and when the adjusting nut 31 is fixed, the tightening force (contact force) between the tightening surface 32 and the belt 41 is fixed. Because of the friction characteristic, the belt 41 will produce a maximum static friction torque relative to the tightening surface 32, when the torque (external load) borne on the belt 41 is smaller than the maximum static friction torque, the belt 41 is fixed relative to the tightening surface 32, at this time, the output rotation speed ratio (transmission ratio) of the speed reducing mechanism is fixed, the self-rotation force of the cycloidal gear is provided by the tooth form of the belt 41, and the rotation speed ratio is related to the number of teeth of the cycloidal gear, the number of teeth of the belt 41 and the eccentric amount of the cycloidal gear; when the external load torque is too large and is larger than the maximum static friction torque between the belt 41 and the tightening surface 32, the ring gear member 4 slides relative to the tightening surface 32, and the motor operates only under the condition of approaching the maximum static friction torque and cannot generate the current overload condition due to the incapability of rotating, so that the overload protection effect is realized on the motor. The protection mechanism is mainly related to the maximum static friction torque of the belt 41 relative to the tightening surface 32, and the maximum static friction torque is in direct proportion to the surface friction coefficient of the belt 41 and the positive pressure of the tightening surface 32 on the surface of the belt 41, so that the maximum static friction torque can be changed by reasonably selecting the material of the belt 41 and rotating the adjusting nut 31 or the roughness of the contact surface between the belt 41 and the tightening surface 32, and the maximum static friction torque is the maximum output load of the speed reducing mechanism.
The second protection mechanism is cycloidal gear sliding tooth protection, and the working principle is as follows:
this protection mechanism is used in a state where the belt 41 is relatively fixed with respect to the tightening surface 32. The transmission of the belt 41 to the cycloidal gear is through the meshing transmission of the convex tooth surface 411 of the belt 41 and the concave tooth surface 621 on the cycloidal gear, as shown in fig. 5. Because the belt 41 is made of non-metallic material, when the moment is too large due to the sudden increase of load, the meshing state of the convex tooth surface 411 of the belt 41 and the concave tooth surface 621 on the cycloidal gear can generate a tooth slipping phenomenon due to the deformation of the belt 41, so that the output rotation speed ratio of the speed reducing mechanism is 0; when the load returns to normal, the belt 41 is deformed and returns to normal by the loss of the torque, and the rotation speed ratio is restored. The protection mechanism can reasonably design the shapes of the convex tooth surface 411 of the belt 41 and the concave tooth surface 621 on the cycloidal gear by selecting a proper material of the belt 41, or reasonably design the eccentric amount of the two eccentric sections 12 and 13 of the eccentric shaft 1, so that the maximum load moment of the cycloidal gear relative to the belt 41 when the cycloidal gear generates the sliding tooth phenomenon reaches an expected design value, namely the maximum output load of the speed reducing mechanism.
The foregoing description of the specific embodiments of the invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (13)
1. The speed reducing mechanism with the overload protection function is characterized by comprising an eccentric shaft (1), a shell (2), a tightening device (3), a cycloidal gear device, a transmission part (7) and an upper shell (8), wherein the eccentric shaft (1) is provided with a first non-eccentric section (14) and an eccentric section, the first non-eccentric section (14) is connected with the transmission part (7), the eccentric section is connected with the cycloidal gear device, the cycloidal gear device is circumferentially connected with the tightening device (3), the cycloidal gear device is connected with the transmission part (7), the shell (2) and the upper shell (8) are connected to form an accommodating space, the eccentric shaft (1), the tightening device (3), the cycloidal gear device and the transmission part (7) are located in the accommodating space, the eccentric shaft (1) is connected with a motor, and the transmission part (7) is connected with a load.
2. The reduction gear mechanism with overload protection function according to claim 1, wherein the eccentric shaft (1) is provided with one or more eccentric sections, the centers of the eccentric sections are uniformly distributed in the circumferential direction around the center of the eccentric shaft (1), and the centers of the eccentric sections are equidistant from the center of the eccentric shaft (1).
3. The reduction mechanism with an overload protection function according to claim 1, wherein the cycloid gear device comprises one or more cycloid gears, and the cycloid gears are connected with the eccentric sections in a one-to-one correspondence;
the cycloidal gear comprises a pin sleeve, a cycloidal wheel disc and a disc bearing, wherein one or more pin sleeves are arranged on the cycloidal wheel disc, the cycloidal wheel disc is connected with a transmission part (7) through the pin sleeve, and the cycloidal wheel disc is connected with an eccentric section through the disc bearing and can freely rotate relative to the eccentric section.
4. The reduction gear with overload protection function according to claim 3, characterized in that the edge of the cycloid disc is smooth, the cycloid disc is connected with the tightening device (3) through the edge, and the edge of the cycloid disc is the edge of the cycloid disc.
5. The reduction gear mechanism with overload protection function according to claim 4, characterized in that the tightening device (3) comprises an adjusting nut (31) and a tightening surface (32), the tightening surface (32) is one or more arc-shaped parts, one or more bolts are arranged on the outer side of the tightening surface (32) and are connected with the adjusting nut (31),
the tightening surfaces (32) are uniformly distributed in the circumferential direction of the cycloid wheel device, and the tightening surfaces (32) adjust the degree of the inner side of the tightening surfaces to be attached to the edge of the cycloid wheel device through adjusting nuts (31).
6. The reduction gear mechanism with overload protection function according to claim 5, wherein the friction surface (33) made of non-metallic material is arranged on the inner side of the clamping surface (32);
the torque between the friction surface (33) and the edge of the cycloidal gear, which torque is generated by the maximum static friction force, can be adjusted by changing the friction coefficient of the friction surface (33) and/or the edge of the cycloidal gear and the positive pressure exerted by the friction surface (33) on the edge of the cycloidal gear;
the motor operates in a situation where the friction torque between the friction surface (33) and the edge of the cycloid wheel is less than the torque generated by the maximum static friction force between the friction surface and the edge of the cycloid wheel.
7. The reduction mechanism with overload protection function according to claim 1, wherein the transmission member (7) comprises a driven bearing (71), an output shaft disc (72), a driven disc (73), a transmission pin (74) and an output shaft (75), the driven disc (73) is connected with a pin sleeve of the cycloidal gear device through the transmission pin (74) and can rotate along with the cycloidal gear device, the driven disc (73) is connected with the output shaft disc (72), the output shaft disc (72) is connected with the first non-eccentric section (14) through the driven bearing (71), the output shaft (75) is arranged on the output shaft disc (72), and the output shaft (75) is connected with a load.
8. The reduction mechanism with the overload protection function according to claim 1, wherein the upper casing (8) comprises an outer bearing (81), an end cover (82) and a connecting piece (83), the end cover (82) is connected with the outer casing (2) through the connecting piece (83), the middle part of the end cover (82) is provided with an outer bearing (81) mounting position and is connected with the output shaft (75) of the transmission part (7) through the outer bearing (81);
the end part of the shell (2) is provided with a through hole through which the eccentric shaft (1) passes, a through hole through which a bolt of the tightening device (3) passes is circumferentially arranged, and an adjusting nut (31) of the tightening device (3) is positioned on the circumferential surface of the shell (2) and connected with the bolt of the tightening device (3) positioned on the circumferential surface of the shell (2).
9. The reduction mechanism with overload protection function according to claim 3, further comprising an internal gear ring component (4), wherein gear teeth are arranged on the edge of the cycloid gear device, and a second non-eccentric section (11) is further arranged on one end of the eccentric shaft (1) connected with the motor;
the inner ring gear component (4) comprises a belt (41), an outer gear (42) and a ring gear bearing (43), the outer gear (42) is connected with the second non-eccentric section (11) through the ring gear bearing (43) and can rotate along with the eccentric shaft (1), and the belt (41) is respectively connected with the outer gear (42) and a cycloid wheel of the cycloid wheel device;
the circumferential surface of the belt (41) is connected to a tightening device (3).
10. The reduction gear mechanism with overload protection function according to claim 9, wherein the belt (41) is a belt made of elastic non-metallic material, the belt (41) is internally provided with gear teeth, the number of the gear teeth is equal to the number of teeth of the external gear (42), the pitch circle diameter of the gear teeth is equal to the pitch circle diameter of the external gear (42), and the belt (41) is connected with the external gear (42) in a matching way through the gear teeth and can rotate along with the external gear (42).
11. The reduction mechanism with an overload protection function according to claim 10, characterised in that the tooth profile of the gear teeth on the edge of the cycloid wheel device is the same as the tooth profile of the external gear (42), the number of the gear teeth being smaller than the number of teeth of the external gear (42);
the cycloidal gear of the cycloidal gear device is connected with a belt (41) in a matching mode through gear teeth, the belt (41) comprises a convex tooth surface (411), the cycloidal gear of the cycloidal gear device comprises a concave tooth surface (621), and the convex tooth surface (411) is meshed with the concave tooth surface (621).
12. The reduction gear mechanism with overload protection function according to claim 9, characterized in that the tightening device (3) comprises an adjusting nut (31) and a tightening surface (32), the tightening surface (32) is one or more arc-shaped parts, one or more bolts are arranged on the outer side of the tightening surface (32) and are connected with the adjusting nut (31),
the tightening surfaces (32) are uniformly distributed on the circumferential direction of the belt (41), and the tightening surfaces (32) adjust the degree of the inner side of the tightening surfaces to be attached to the belt (41) through the adjusting nuts (31).
13. The reduction gear mechanism with overload protection function according to claim 12, wherein the friction surface (33) made of non-metallic material is arranged on the inner side of the tightening surface (32);
the torque between the friction surface (33) and the belt (41) resulting from the maximum static friction force can be adjusted by varying the friction coefficient of the friction surface (33) and/or the belt (41) and the positive pressure exerted by the friction surface (33) on the belt (41);
the motor operates in a situation where the friction torque between the friction surface (33) and the belt (41) is less than the torque generated by the maximum static friction force between the friction surface and the belt.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920944609.2U CN211288647U (en) | 2019-06-21 | 2019-06-21 | Speed reducing mechanism with overload protection function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920944609.2U CN211288647U (en) | 2019-06-21 | 2019-06-21 | Speed reducing mechanism with overload protection function |
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| CN211288647U true CN211288647U (en) | 2020-08-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110173551A (en) * | 2019-06-21 | 2019-08-27 | 上海快点机器人科技有限公司 | Deceleration mechanism with overload protection function |
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2019
- 2019-06-21 CN CN201920944609.2U patent/CN211288647U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110173551A (en) * | 2019-06-21 | 2019-08-27 | 上海快点机器人科技有限公司 | Deceleration mechanism with overload protection function |
| CN110173551B (en) * | 2019-06-21 | 2024-06-04 | 上海快点机器人科技有限公司 | Speed reducing mechanism with overload protection function |
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