A vibration-damping and vibration-isolating elastic spoke gear and its assembly method

Abstract

The present invention relates to an elastic spoke gear for vibration reduction and isolation and an assembly method thereof, and belongs to the technical field of vibration reduction and isolation of spatial mechanisms. The elastic spoke gear for vibration reduction and isolation includes an inner gear ring, an outer gear ring, and a plurality of elastic spokes. The inner gear ring and the outer gear ring are both annular, and the outer edge of the outer gear ring is in the shape of a bulge extending upward and downward, and the outer edge diameter of the inner gear ring is smaller than the inner edge diameter of the outer gear ring. The inner gear ring and the outer gear ring are coaxially arranged; one end of the elastic spoke is connected to the inner gear ring, and the other end of the elastic spoke is connected to the outer gear ring, and the elastic spoke, the inner gear ring, and the outer gear ring are located in the same plane. The gear structure uses SMA elastic spokes to connect the inner gear ring and the outer gear ring, which effectively reduces the rotational stiffness of the transmission gear and enhances its vibration reduction and isolation effect. The assembly method uses a tooling structure to position, install, and press the gear to improve assembly accuracy, avoid force imbalance caused by assembly asymmetry, and even avoid more serious vibration problems.

Description

Technical Field

[0001] The invention relates to the technical field of vibration reduction and isolation of spatial mechanisms, in particular to an elastic spoke gear for vibration reduction and isolation and an assembly method thereof. Background Art

[0002] With the development of science and technology, people are also exploring space technology more deeply, and among them, the various factors that spacecraft may be affected by are particularly valued. Micro-vibration is a low-amplitude flutter generated by a spacecraft during its in-orbit operation. The interference of the space environment (such as solar wind, etc.) and the influence of the spacecraft's own moving parts will cause micro-vibration, which has a significant impact on the satellite's precision payload. In terms of space drive and operating mechanisms, the micro-vibration caused by the moving parts will be amplified by the actuator at the end, thereby affecting the normal progress of the space mission. Therefore, isolating and suppressing the micro-vibration of the space pointing mechanism is one of the important issues that need to be solved in space vibration control. In the existing technology, the gear structure required for the existing vibration isolation and suppression methods is too complex, and the accuracy after assembly cannot be guaranteed. Vibration problems caused by unbalanced forces may occur, which makes the effect of vibration isolation and suppression worse. Therefore, how to design a moving part that can achieve excellent vibration reduction and isolation functions through a simple structure remains to be solved. Summary of the Invention

[0003] The present invention discloses an elastic spoke gear with vibration reduction and isolation and its assembly process. By adopting SMA elastic spokes to connect the gear inner ring and the gear outer ring, the rotational stiffness of the transmission gear is effectively reduced, and the gear has vibration reduction and isolation functions. In addition, the design of the tooling structure can greatly ensure the assembly accuracy of the gear.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A vibration-damping and vibration-isolating elastic spoke gear, comprising: an inner gear ring, an outer gear ring, and a plurality of elastic spokes, wherein the inner gear ring and the outer gear ring are both annular, the outer edge of the outer gear ring is in the shape of a convex shape extending upward and downward, and the outer edge diameter of the inner gear ring is smaller than the inner edge diameter of the outer gear ring, and the inner gear ring and the outer gear ring are coaxially arranged;

[0006] One end of the elastic spoke is connected to the gear inner ring, and the other end of the elastic spoke is connected to the gear outer ring, and the elastic spoke, the gear inner ring and the gear outer ring are located in the same plane.

[0007] Optionally, a plurality of the elastic spokes are evenly distributed circumferentially along the central axes of the gear inner ring and the gear outer ring.

[0008] Optionally, the elastic spoke is in an I-shape, and the cross beams at both ends of the elastic spoke are bent along the radial direction of the spoke gear from the outer ring of the gear to the inner ring of the gear, and the material of the elastic spoke is SMA;

[0009] A plurality of first connecting grooves are provided on the outer edge of the inner ring of the gear, which match the shape and position of the second end cross beam of the elastic spoke, and the number of the first connecting grooves is the same as the number of the elastic spokes. A plurality of second connecting grooves are provided on the inner edge of the outer ring of the gear, which match the shape and position of the first end cross beam of the elastic spoke, and the number of the second connecting grooves is the same as the number of the elastic spokes.

[0010] Optionally, the elastic spokes are fixed to the first connecting groove and the second connecting groove by gluing.

[0011] Optionally, a plurality of first through holes and first pin holes for positioning during assembly are provided on the top end surface of the gear inner ring surrounding the central axis;

[0012] The end surface of the outer ring of the gear is also provided with a plurality of second pin holes and second through holes for positioning during the assembly process.

[0013] A method for assembling the elastic spoke gear for vibration reduction and isolation, wherein the elastic spoke gear is assembled using a tooling structure, wherein the tooling structure includes a first tooling part and a second tooling part;

[0014] The assembly method comprises:

[0015] Placing the inner ring of the gear on the first mounting portion, and positioning and fixing it;

[0016] Place the outer ring of the gear on the first mounting portion so that the outer ring and the inner ring of the gear are coaxial and on the same plane, and position and fix them;

[0017] Apply glue to the connecting ends of the elastic spokes to the outer ring of the gear and the inner ring of the gear, so that the elastic spokes are connected between the inner ring of the gear and the outer ring of the gear;

[0018] Placing the second tooling part on the first tooling part and positioning them so that the second tooling part and the first tooling part clamp the gear inner ring, the gear outer ring and the elastic spokes and securely connect them;

[0019] After the glue is dry, the tooling structure is removed to complete the assembly of the elastic spoke gear.

[0020] Optionally, the first fixture part is a disc structure, and a spoke positioning boss that matches the elastic spoke is provided on the top surface of the first fixture part;

[0021] An inner ring boss for positioning that cooperates with the inner ring of the gear and an outer ring boss for positioning that cooperates with the outer ring of the gear are also provided on the top surface of the first tooling part, and an inner ring positioning shaft for assisting in positioning the inner ring of the gear is also provided on the first tooling part.

[0022] Optionally, the second fixture part is a disc structure, and the bottom surface of the second fixture part is provided with a spoke pressing boss for clamping and cooperating with the spoke positioning boss, and the bottom surface of the second fixture part is further provided with a gear pressing boss for clamping and cooperating with the inner ring boss and the outer ring boss, and the gear pressing boss is fan-shaped;

[0023] The second tooling portion is further provided with a plurality of spoke windows running through from top to bottom and cooperating with the elastic spokes.

[0024] Optionally, a first positioning pin hole group is provided on the first fixture part, and a second positioning pin hole group is provided on the end surface of the gear pressing boss of the second fixture part and is opposite to the first pin hole for positioning.

[0025] Optionally, before removing the tooling structure, the bonding effect between the elastic spokes and the gear inner ring and the gear outer ring is observed through the spoke viewing window.

[0026] Beneficial effects of the present invention:

[0027] (1) In this application, elastic spokes made of SMA material are used to connect the inner ring of the gear and the outer ring of the gear, which effectively reduces the rotational stiffness of the transmission gear, enhances the vibration reduction and isolation function of the gear structure, and can effectively improve the accuracy of the spatial drive and operating mechanism.

[0028] (2) In this application, the elastic spokes and the inner ring and outer ring of the gear are connected by gluing. The connection strength meets the load requirements, the interface is smoother, and the outer envelope of the gear is not changed. It can better replace the existing gears and can be well used in mechanisms with limited space.

[0029] (3) The main structure of the gear of the present application only includes the inner ring of the gear, the outer ring of the gear and the elastic spokes, and the tooling structure only includes the first tooling part and the second tooling part. The structure is simple and compact, the manufacturing cost is low, there is no redundant material, and the reliability is high.

[0030] (4) The assembly process of the present application adopts a tooling structure for assembly. The positioning and reinforcement of the gears by the tooling structure can greatly ensure the assembly accuracy of the gears, avoiding the unbalanced force caused by the asymmetric assembly and even more serious vibration problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A bottom view of an elastic spoke gear provided by an embodiment of the present invention;

[0032] Figure 2 A top view of an elastic spoke gear provided by an embodiment of the present invention;

[0033] Figure 3 A schematic diagram of the gear inner ring structure provided by an embodiment of the present invention;

[0034] Figure 4 A schematic diagram of the gear outer ring structure provided by an embodiment of the present invention;

[0035] Figure 5 A schematic diagram of the elastic spoke structure provided by an embodiment of the present invention;

[0036] Figure 6 A schematic diagram of the assembled gear and tooling structure provided in an embodiment of the present invention;

[0037] Figure 7 An assembly process flow chart provided for an embodiment of the present invention;

[0038] Figure 8 A schematic structural diagram of a first tooling part provided in an embodiment of the present invention;

[0039] Figure 9 A bottom view of a first tooling portion provided in an embodiment of the present invention;

[0040] Figure 10 A cross-sectional view of a first tooling portion provided in an embodiment of the present invention;

[0041] Figure 11 A schematic structural diagram of a second tooling portion provided in an embodiment of the present invention;

[0042] Figure 12 A top view of the second tooling part provided in an embodiment of the present invention.

[0043] Reference numerals:

[0044] 1-gear inner ring; 11-first connecting groove; 12-first through hole; 13-first pin hole; 2-gear outer ring;

[0045] 21-gear teeth; 22-second connecting groove; 23-second pin hole; 24-second through hole; 3-elastic spokes;

[0046] 31-middle section; 32-first end; 33-second end; 34-first end mating surface; 35-second end mating surface;

[0047] 4-first tooling part; 41-first hand-held hole; 42-inner ring positioning shaft; 43-spoke positioning boss;

[0048] 431-first boss; 432-second boss; 44-inner ring boss; 45-outer ring boss;

[0049] 46 - first positioning pin hole; 47 - second positioning pin hole; 48 - nut mounting slot;

[0050] 49 - first screw mounting hole; 5 - second tooling portion; 51 - second hand-held hole; 52 - spoke pressing boss;

[0051] 53-gear pressing boss; 54-second positioning pin hole group; 55-spoke window; 56-second screw mounting hole;

[0052] 6-Location pin; 7-Fixing screw. DETAILED DESCRIPTION

[0053] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not 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 efforts are within the scope of protection of the present invention.

[0054] This application proposes a vibration-reducing and vibration-isolating elastic spoke gear, such as Figure 1 as well as Figure 2 As shown, it includes a gear inner ring 1, a gear outer ring 2, and a plurality of elastic spokes 3 connecting the gear inner ring 1 and the gear outer ring 2. It should be noted that when the number of elastic spokes 3 is greater than or equal to 3, a better vibration isolation and suppression effect can be achieved. The outer diameter of the gear inner ring is smaller than the inner diameter of the gear outer ring, and the gear inner ring and the gear outer ring are arranged coaxially.

[0055] The inner ring 1 of the gear and the outer ring 2 of the gear are not an integral structure, but are connected by n elastic spokes 3 to reduce the torsional stiffness of the gear. In addition, the elastic spokes 3 are made of SMA (Shape memory alloy), which has unique superelastic properties and has an excellent effect on vibration isolation and vibration suppression. In the embodiment of the present application, the case of n=4 is taken as an example. The four elastic spokes 3 are evenly distributed along the circumference. Due to the SMA material properties of the spokes, as the elasticity increases, the torsional stiffness of the gear decreases, thereby strengthening its effect of reducing torsional stiffness. And as the number of elastic spokes 3 increases, if their positions are evenly distributed along the circumference, the force they receive will also be more uniform.

[0056] Specifically, the structure of the elastic spokes 3 is approximately in the shape of an I, such as Figure 5As shown, it is used to secure the gear structure. The narrow middle section 31 in its center reduces the overall rotational stiffness of the gear and deforms when subjected to load during gear rotation. The ends are wider and curved radially from the outer ring 2 toward the inner ring 1, forming a curvature that corresponds to the curvature of the gear structure at the corresponding radius. Correspondingly, the outer side of the inner ring 1 is provided with a plurality of first connecting grooves 11 corresponding to the positions of the elastic spokes 3. These first connecting grooves 11 are vertically through-grooved grooves, the same number as the number of elastic spokes 3, and are used to connect to the second ends 33 of the elastic spokes 3. The inner end surface of the outer ring 2 is also provided with a plurality of second connecting grooves 22 corresponding to the positions of the elastic spokes 3. These second connecting grooves 22 are also vertically through-grooved grooves, the same number as the number of elastic spokes 3, and are used to connect to the first ends 32 of the elastic spokes 3. They radially correspond to the first connecting grooves 11 of the inner ring 1. The slightly larger end of the elastic spoke 3, known as the first end 32, mates with the second connection groove 22 of the gear outer ring 2. The slightly smaller end, known as the second end 33, mates with the first connection groove 11 of the gear inner ring 1. AB glue is used to bond the first end 32's mating surface 34 and the second end 33's mating surface 35. It should be noted that the first end mating surface 34 and the second end mating surface 35 should be sufficiently large to ensure sufficient bonding area and, therefore, the strength of the gear connection.

[0057] Specifically, if Figure 3 As shown in the figure, the inner ring 1 of the gear is annular with a through hole at its center. The outer ring 2 of the gear is also annular. Figure 4 As shown, its outer edge is convex and extends upward and downward, each protruding a certain distance upward and downward to provide support. Its outer side is provided with gear teeth 21 for meshing with the pinion gear on the motor output shaft to achieve transmission. The distance between the inner edge of the gear outer ring 2 and the outer edge of the gear inner ring 1 should be approximately the length of the middle section 31 of the elastic spoke 3. It should be noted that the thickness of the outermost portion of the gear outer ring 2, where the gear teeth 21 are machined, should be greater than the thickness of the inner end face to ensure adequate meshing of the gear teeth 21 and sufficient load-bearing capacity.

[0058] Furthermore, to facilitate positioning, the top end surface of the gear inner ring 1, surrounding the central axis, is provided with several first through-holes 12 and first pin holes 13 for positioning during assembly. The first through-holes 12 are used to connect to the drive shaft via screws. The axes of the first pin holes 13 are perpendicular to the end surface of the gear inner ring 1 and are used to position the gear inner ring 1 during assembly via the locating pins 6. Both the first through-holes 12 and the first pin holes 13 are evenly distributed along the circumference.

[0059] The end face of the gear outer ring 2 is also provided with several second pin holes 23 and second through holes 24 for positioning during the assembly process. The axes of the second pin holes 23 and the second through holes 24 should be perpendicular to the inner end face. The second pin holes 23 are used to position the gear outer ring 2 through the locating pins 6 during assembly, and the second through holes 24 are used to connect the experimental equipment when conducting other experiments, such as connecting the static stiffness experimental equipment when conducting a static stiffness experiment.

[0060] The present application also discloses an assembly method for the elastic spoke gear for vibration reduction and isolation, wherein a tooling structure is used to assemble the elastic spoke gear structure, such as Figure 6 The tooling structure includes a first tooling part 4 and a second tooling part 5. The assembly method during the assembly process is as follows: Figure 7 As shown, including:

[0061] S1: Install the inner ring of the gear on the first mounting portion, and position and fix it;

[0062] S2: Place the outer ring of the gear on the first mounting portion, with the outer ring of the gear being coaxial with the inner ring of the wheel and located on the same plane, and position and fix them;

[0063] S3: Apply glue to the connecting ends of the elastic spokes at the outer ring of the gear and the inner ring of the gear, so that the elastic spokes are connected between the inner ring of the gear and the outer ring of the gear;

[0064] S4: placing the second fixture part on the first fixture part and positioning it so that the second fixture part and the first fixture part clamp the gear inner ring, the gear outer ring and the elastic spokes and are fixedly connected;

[0065] S5: After the glue is dry, remove the tooling structure and complete the assembly of the elastic spoke gear.

[0066] Specifically, in the tooling structure, the first tooling part 4 is a disc structure with a diameter slightly larger than the gear structure, such as Figures 8 to 10 As shown, a first handle hole 41 is provided through its center to prevent the tool from being unable to apply force when handling. Surrounding the first handle hole 41 of the first tooling portion 4 is an inner ring positioning shaft 42, which assists in positioning the inner ring 1 of the gear. This inner ring positioning shaft 42 is annular and has a slightly larger clearance at this location, serving only as an auxiliary function. Several pairs of spoke positioning bosses 43 are provided on the top end surface of the disc. The number of spoke positioning bosses 43 should match the number of elastic spokes 3, and their positions correspond to the first connecting grooves 11 and second connecting grooves 22 of the concentrically placed inner ring 1 and outer ring 2 of the gear.

[0067] The spoke positioning bosses 43 include a first boss 431 and a second boss 432. The first boss 431, located near the first handle hole 41, is used to seat the second end 33 of the elastic spoke 3, while the second boss 432, located near the outer ring, is used to seat the first end 32 of the elastic spoke 3. These two bosses work together to locate the axial position of the elastic spoke 3. It should be noted that the cross-sectional shape of the first boss 431 should be consistent with that of the second end 33 of the elastic spoke 3, while the cross-sectional shape of the second boss 432 should be consistent with that of the first end 32 of the elastic spoke 3. Both bosses should be slightly smaller in area than the areas of the ends of the elastic spoke 3. This allows for a certain circumferential clearance during assembly to prevent adhesion between the gear and the assembly tooling during gluing.

[0068] The first fixture portion 4 is further provided with an inner ring boss 44 and an outer ring boss 45. The inner ring boss 44 is a cylindrical boss used to locate the circumferential position of the gear inner ring 1. The number of inner ring bosses 44 should be consistent with the number of first pin holes 13. For example, if four first pin holes 13 are provided in this application, four sets of inner ring bosses 44 should be provided. The outer ring bosses 45 are also cylindrical bosses used to locate the circumferential position of the gear outer ring 2. The number of outer ring bosses 45 is consistent with the number of inner ring bosses 44.

[0069] Specifically, the second fixture part 5 is a disc structure with a diameter slightly larger than the gear structure, such as Figures 11 to 12 As shown, a second gripping hole 51 is provided through the center of the disc structure for easy grasping. The bottom of the disc structure is provided with several pairs of spoke clamping bosses 52 that cooperate with the spoke positioning bosses 43 for clamping. These bosses are positioned correspondingly to the spoke positioning bosses 43, have the same shape, and the number of pairs matches the number of elastic spokes 3. Furthermore, the bottom of the disc structure is also provided with gear clamping bosses 53 that cooperate with the gear inner ring 1 and the gear outer ring 2 for clamping. These gear clamping bosses 53 are fan-shaped and evenly distributed along the circumference. The smaller arc length portion is used to clamp the gear inner ring 1, while the larger arc length portion is used to clamp the gear outer ring 2. The disc structure of the second tooling part 5 is also provided with a plurality of spoke viewing windows 55 passing through. The spoke viewing windows 55 are fan-shaped and evenly distributed along the circumference. Each spoke viewing window 55 is provided between each pair of spoke pressing bosses 52, and the length of the spoke viewing windows 55 in the radial direction is adapted to the length of the elastic spoke 3. Other functional structures need to be avoided during installation, so that the operator can observe the bonding condition of the bonding position of the elastic spoke 3 through the spoke viewing windows 55.

[0070] In addition, the first fixture is provided with a first locating pin hole group, which includes a first locating pin hole 46 located on the inner ring boss 44 and a second locating pin hole 47 located on the outer ring boss 45. The first locating pin hole 46 cooperates with the first pin hole 13 to locate the radial position of the gear inner ring 1. Its position corresponds to the position of the first pin hole 13 on the gear inner ring 1. The first pin hole 13, the first locating pin hole 46, and the locating pin 6 enable positioning between the gear inner ring 1 and the first fixture 4. The second locating pin hole 47 cooperates with the second pin hole 23 to locate the radial position of the gear outer ring 2. Its position corresponds to the position of the second pin hole 23 on the gear outer ring 2. The second pin hole 23, the second locating pin hole 47, and the locating pin 6 enable positioning between the gear outer ring 2 and the first fixture 4.

[0071] The end surface of the gear-pressing boss 53 of the second fixture 5 is also provided with a second positioning pin hole group 54 that cooperates with the first pin hole 13 and the second pin hole 23. The position of the second positioning pin hole group 54 should correspond to the positions of the first pin hole 13 and the second pin hole 23 on the gear inner ring 1 and the gear outer ring 2, and serves to position the gear inner ring and the gear outer ring. The first pin hole 13, the second pin hole 23, the second positioning pin hole group 54, and the positioning pin 6 can satisfy the positioning relationship between the gear inner ring 1, the gear outer ring 2, and the second fixture 5. At the same time, because the main function of the second fixture 5 is compression, high precision is not required. Therefore, the hole diameter of the second positioning pin hole group 54 can be slightly larger to provide a certain margin to avoid interference during installation.

[0072] Furthermore, to strengthen the fixing relationship between the various components, a number of nut mounting grooves 48 are provided on the bottom surface of the first fixture portion 4. These nut mounting grooves 48 are located within the annular area formed by the first pin hole 13 of the gear inner ring 1 and the second pin hole 23 of the gear outer ring 2. The groove is approximately elliptical in shape, with a first screw mounting hole 49 provided in its center. During assembly, the nut is installed within the groove. The sidewalls of the groove can limit the rotation of the nut, facilitating the screwing in of the fixing screw, and its position should avoid other boss structures and elastic spoke portions. Correspondingly, a second screw mounting hole 56 is provided on the top surface of the second fixture portion 5. This second screw mounting hole 56 is provided between the locating pin hole group 54 and its position should correspond to that of the first screw mounting hole 49, also serving a reinforcing function.

[0073] The assembly method of the elastic spoke gear with vibration reduction and isolation can be specifically divided into the following steps:

[0074] First, place the nuts in the nut mounting grooves 48 and place the first tooling part 4 horizontally on the mounting platform. The number of nuts depends on the number of nut mounting grooves 48. For example, in this application, if there are four nut mounting grooves 48, four nuts should be placed in the four nut mounting grooves 48 respectively.

[0075] Then, the gear inner ring 1 is installed on the inner ring positioning shaft 42 of the first tooling part 4, and is positioned by the inner ring boss 44 and the positioning pin 6 of the first tooling part 4. After the gear inner ring 1 is installed on the inner ring positioning shaft 42, it should be noted that the gear inner ring 1 should match the inner ring positioning shaft 42, and the position of the first connecting groove 11 of the gear inner ring 1 should correspond to the position of the spoke positioning boss 43 of the first tooling part 4.

[0076] Then install the gear outer ring 2 on the first tooling part 4, and position it through the outer ring boss 45 of the first tooling part 4 and the positioning pin 6, reserving a position for placing the elastic spoke 3. At this time, it should be noted that the second connecting groove 22 of the gear outer ring 2 should also correspond to the position of the spoke positioning boss 43 of the first tooling part 5, that is, the positions of the first connecting groove 11 and the second connecting groove 22 should correspond to each other, and the gear inner ring 1 and the gear outer ring 2 should be in the same plane at this time.

[0077] Then, mix the AB glue evenly and apply it to the mating surfaces at both ends of the elastic spoke 3. Then, place the elastic spoke 3 vertically from top to bottom into the reserved gap between the gear inner ring 1 and the gear outer ring 2, so that its first end 32 is matched with the second connecting groove 22 of the gear outer ring 2, and the second end 33 is matched with the first connecting groove 11 of the gear inner ring 1.

[0078] Finally, the second fixture 5 is placed on the gear structure according to the relative positions of the locating pin hole group 54 and the first and second pin holes 13 and 23. The second fixture 5 is tightened, and the fixing screw 7 is inserted into the second screw mounting hole 56 and the first screw mounting hole 49 and engaged with the nut. After placing the second fixture 5, it should also be noted that the gear pressing boss 53 should contact the gear inner ring 1 and the gear outer ring 2 respectively, and the spoke pressing boss 52 should contact and press the elastic spoke 3 to ensure that the elastic spoke 3 is in the same plane as the gear inner ring 1 and the gear outer ring 2. After tightening the fixing screw 7, the first fixture 4, the second fixture 5, and the intermediate gear inner ring 1, the gear outer ring 2, and the elastic spoke 3 are all clamped.

[0079] Let it stand and wait for the AB glue to completely solidify, observe the bonding effect through the spoke window 55, and after confirming that it is correct, remove the tooling structure and take out the elastic spoke gear.

[0080] The standing time should be determined according to the actual situation. For example, in the embodiment of the present application, the bonding is allowed to stand for 24 hours, during which the bonding effect can be observed through the spoke windows 55 .

[0081] Obviously, those skilled in the art may make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. An elastic spoke gear with vibration reduction and isolation, characterized in that: include: A gear inner ring, a gear outer ring, and a plurality of elastic spokes, wherein the gear inner ring and the gear outer ring are both annular, the outer edge of the gear outer ring is in a convex shape extending upward and downward, and the outer edge diameter of the gear inner ring is smaller than the inner edge diameter of the gear outer ring, and the gear inner ring and the gear outer ring are coaxially arranged; One end of the elastic spoke is connected to the inner ring of the gear, and the other end of the elastic spoke is connected to the outer ring of the gear, and the elastic spoke, the inner ring of the gear and the outer ring of the gear are located in the same plane; a plurality of the elastic spokes are evenly distributed along the circumference of the central axis of the inner ring of the gear and the outer ring of the gear. The elastic spokes are in an "I" shape, and the cross beams at both ends of the elastic spokes are bent along the radial direction of the spoke gear from the outer ring of the gear to the inner ring of the gear. The material of the elastic spokes is SMA. The outer edge of the inner ring of the gear is provided with a plurality of first connecting grooves that match the shape and position of the second end cross beams of the elastic spokes, and the number of the first connecting grooves is the same as the number of the elastic spokes. The inner edge of the outer ring of the gear is provided with a plurality of second connecting grooves that match the shape and position of the first end cross beams of the elastic spokes, and the number of the second connecting grooves is the same as the number of the elastic spokes.

2. The elastic spoke gear for vibration reduction and isolation according to claim 1, characterized in that: The elastic spokes are fixed to the first connecting groove and the second connecting groove by gluing.

3. The elastic spoke gear for vibration reduction and isolation according to claim 2, characterized in that: The top end surface of the gear inner ring surrounding the central axis is provided with a plurality of first through holes and first pin holes for positioning during the assembly process; The end surface of the outer ring of the gear is also provided with a plurality of second pin holes and second through holes for positioning during the assembly process.

4. A method for assembling a vibration-damping and vibration-isolating elastic spoke gear according to any one of claims 1 to 3, characterized in that: The elastic spoke gear is assembled using a tooling structure, wherein the tooling structure includes a first tooling part and a second tooling part; The assembly method comprises: Placing the inner ring of the gear on the first fixture, and positioning and fixing it; Place the outer ring of the gear on the first fixture so that the outer ring and the inner ring of the gear are coaxial and on the same plane, and then position and fix them; Apply glue to the connecting ends of the elastic spokes to the outer ring of the gear and the inner ring of the gear, so that the elastic spokes are connected between the inner ring of the gear and the outer ring of the gear; Placing the second tooling part on the first tooling part and positioning them so that the second tooling part and the first tooling part clamp the gear inner ring, the gear outer ring and the elastic spokes and securely connect them; After the glue is dry, the tooling structure is removed to complete the assembly of the elastic spoke gear.

5. The assembly method according to claim 4, characterized in that: The first fixture part is a disc structure, and a spoke positioning boss that matches the elastic spoke is provided on the top surface of the first fixture part; An inner ring boss for positioning that cooperates with the inner ring of the gear and an outer ring boss for positioning that cooperates with the outer ring of the gear are also provided on the top surface of the first tooling part, and an inner ring positioning shaft for assisting in positioning the inner ring of the gear is also provided on the first tooling part.

6. The assembly method according to claim 5, characterized in that: The second fixture part is a disc structure, and the bottom surface of the second fixture part is provided with a spoke pressing boss for clamping and cooperating with the spoke positioning boss. The bottom surface of the second fixture part is also provided with a gear pressing boss for clamping and cooperating with the inner ring boss and the outer ring boss, and the gear pressing boss is fan-shaped. The second tooling portion is further provided with a plurality of spoke windows running through from top to bottom and cooperating with the elastic spokes.

7. The assembly method according to claim 6, characterized in that: The first tooling part is provided with a first positioning pin hole group for positioning the first tooling part, the gear inner ring and the gear outer ring, and the end face of the gear pressing boss of the second tooling part is provided with a second positioning pin hole group for positioning the second tooling part, the gear inner ring and the gear outer ring.

8. The assembly method according to claim 7, characterized in that: Before removing the tooling structure, observe the bonding effect between the elastic spokes and the gear inner ring and the gear outer ring through the spoke viewing window.

Images