A small module gear finishing device based on 3D printing

Abstract

The application discloses a kind of based on 3D printing small module gear finishing device, comprising: polishing mechanism, it includes polishing driving part, polishing gear and main frame body;Main drive mechanism, it drives main frame body to slide along front and back direction;Sub-frame body, passive gear is detachably rotatably connected to sub-frame body, and polishing gear and passive gear are engaged;Sub-drive mechanism, it drives sub-frame body to slide;Displacement amplification mechanism, it includes piezoelectric sensor and centralized control module, piezoelectric sensor and main frame body are opposite, and piezoelectric sensor converts force signal into electric signal, and centralized control module is electrically connected with piezoelectric sensor, main drive mechanism and sub-drive mechanism.The size of electric signal is controlled by centralized control module, and the size of input current of main drive mechanism is controlled, and then main frame body is moved to the direction of decreasing center distance, to form a closed loop control in this way.The purpose of the application is to improve the accuracy of 3D printing small module gear, and provide a kind of based on 3D printing small module gear finishing device.

Description

Technical Field

[0001] This invention relates to the technical field of gear finishing devices, and in particular to a small-module gear finishing device based on 3D printing. Background Technology

[0002] 3D printing, also known as additive manufacturing or rapid prototyping, is a technology that uses digital model files as a basis and employs powdered metals or plastics and other bondable materials to construct objects layer by layer. In our practical applications, we printed a large number of gears with 1, 0.5, and 0.4 molds, ranging from 10 to 50 teeth. The tooth surfaces were quite rough, even containing small granular solids, and the print quality did not meet the requirements of actual applications. Therefore, we needed to manually polish them. Because it was manual polishing, it was easy to over- or under-polish, and the precision of each gear and each set of gears could not be guaranteed during actual polishing. These accumulated problems all reduced the precision of the gear polishing.

[0003] Currently, 3D printing post-processing methods mainly include polishing, surface sandblasting, chemical treatment, vibratory polishing, ReTouch3D, bonding, and coloring. These post-processing techniques are relatively mature, but they are mainly for larger parts and models. For small-module gears, existing post-processing techniques are not suitable. There is a large demand for small-module gears in small devices such as model airplanes, model ships, rotorcraft, and flapping-wing aircraft, and the market supply of small-module gears is far from meeting the demand. With the rise of 3D printing, people will tend to choose 3D printing to process small-module gears that cannot be produced by the market. However, for 3D printed 3D gear post-processing, due to the small size of the parts, existing post-processing techniques cannot be directly used. Therefore, there is currently no mature post-processing technology for small-module gears, making research in this area both necessary and urgent. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a small-module gear precision repair device based on 3D printing, so as to solve one or more technical problems existing in the prior art, and at least provide a beneficial option or create conditions.

[0005] The solution to the technical problem of this invention is:

[0006] A small-module gear finishing device based on 3D printing, having mutually orthogonal front-back, left-right, and up-down directions, includes: a grinding mechanism comprising a grinding drive, a grinding gear, and a main frame; the grinding drive is connected to the main frame and drives the grinding gear to rotate, the rotation axis of the grinding gear being arranged along the left-right direction; a main drive mechanism that drives the main frame to slide along the front-back direction; a secondary frame, to which a driven gear is detachably rotatably connected, the rotation axis of the driven gear being arranged along the left-right direction, the grinding gear and the driven gear meshing; a secondary drive mechanism that drives the secondary frame to slide along the front-back direction; and a displacement amplification mechanism comprising a piezoelectric sensor and a control module; the piezoelectric sensor abutting against the main frame, the piezoelectric sensor converting force signals into electrical signals, and the control module being electrically connected to the piezoelectric sensor, the main drive mechanism, and the secondary drive mechanism.

[0007] Based on the data such as the number of teeth, module, and displacement of the driven gear, the theoretical center distance is calculated according to the parameters of the grinding gear and the driven gear. The main drive mechanism and the auxiliary drive mechanism are controlled by the centralized control module, thereby changing the distance between the main frame and the auxiliary frame in the front-to-back direction. This is primarily to adjust the center distance between the driven gear and the grinding gear to the theoretical center distance. The piezoelectric sensor is initialized, and the auxiliary drive mechanism is de-energized to achieve self-locking and prevent the driven gear from rotating. Then, the driven gear is installed on the auxiliary frame, and the grinding gear is installed on the main frame. The grinding drive component drives the grinding gear to rotate, which in turn drives the driven gear to rotate synchronously, achieving gear grinding. The main frame can slide in the front-to-back direction. The main frame and the piezoelectric sensor are in contact, meaning that the movement of the main frame can reflect the change in the center distance between the grinding gear and the driven gear. The force generated by the change is then converted into an electrical signal by the piezoelectric sensor. The control module controls the input current of the main drive mechanism based on the magnitude of the electrical signal, thereby causing the main frame to move in the direction of decreasing center distance. This forms a closed-loop control, where the actual center distance information is amplified and output in real time through the displacement amplification mechanism, which helps to improve the accuracy of grinding. In addition, the piezoelectric sensor itself has the advantages of wide bandwidth, high sensitivity, high signal-to-noise ratio, simple structure, reliable operation, and light weight.

[0008] As a further improvement to the above technical solution, the sub-frame includes: a lower seat, which is driven by the sub-drive mechanism to slide in the front-back direction; and an upper seat, which is rotatably connected to the lower seat, with the rotation axis of the upper seat set in the up-down direction. A locking mechanism is connected between the upper seat and the lower seat, and the locking mechanism is used to limit the rotation angle of the upper seat.

[0009] The locking mechanism is used to limit the rotation angle between the upper and lower seats, that is, to change the extension direction of the driven gear along the horizontal axis, so that the device can process spur gears, helical gears and bevel gears. Since the above three types of gears are the three most common types of gears in life, it can improve the practicality of the device.

[0010] As a further improvement to the above technical solution, the locking mechanism includes: a locking rod arranged in the vertical direction, the top of the locking rod passing through the upper seat and the bottom passing through the lower seat; a locking elastic element disposed in the upper seat, the two ends of the locking elastic element being connected to the upper seat and the locking rod respectively; and a pull rod connected to the locking rod and extending out of the outer side wall of the upper seat, the upper seat having an adjustment groove in the horizontal direction for the pull rod to pass through, the locking elastic element causing the locking rod to have a downward tendency to move, and causing the pull rod to be locked in the adjustment groove.

[0011] The upper seat rotates around the lower seat to the target position, and then the locking rod is pulled by the pull rod to rotate the pull rod to the target position of the adjustment groove. At this time, the locking elastic element pushes the locking rod downward, and simultaneously pushes the pull rod to press against the adjustment groove, thereby limiting the relative rotation angle of the upper and lower seats. The above locking method is relatively simple and easy for users to use.

[0012] As a further improvement to the above technical solution, the main drive mechanism includes: a main drive component, which is driven by a one-way bearing, the rotation axis of the one-way bearing being arranged in the vertical direction; and a pulley assembly, the one-way bearing drivingly connecting the pulley assembly, the pulley assembly being transmissionally connected to the main frame.

[0013] The actual center distance after installing the driven gear and the grinding gear will be greater than the theoretical center distance. Since the secondary drive mechanism has been locked, only the main drive mechanism can be adjusted. That is, the main drive mechanism actually needs to push the main frame to move in the direction of decreasing center distance. Therefore, in order to better ensure that the main frame moves along the target path and ensure cutting force, a one-way bearing is added so that the main frame drives the grinding gear to move in the direction of decreasing center distance, preventing the pulley set from reversing and causing a decrease in cutting force.

[0014] As a further improvement to the above technical solution, the grinding gear and the driven gear are detachably connected to the main frame and the sub-frame respectively through a disassembly mechanism.

[0015] A disassembly mechanism is added to facilitate the installation of the grinding gear and the driven gear.

[0016] As a further improvement to the above technical solution, the disassembly mechanism includes: a disassembly sleeve, which is rotatably connected to the main frame or the sub-frame, and the rotation axis of the disassembly sleeve is set in the left-right direction; a disassembly component, one end of which is connected to the driven gear or the grinding gear, and the other end of which is engaged with the disassembly sleeve; and a magnet, which is connected to the disassembly sleeve, and the magnet and the disassembly component are magnetically attracted to each other.

[0017] When in use, the magnet is removed, and then the disassembled part is pulled out from the disassembly sleeve to replace the driven gear or grind the gear. The above replacement method is relatively convenient.

[0018] As a further improvement to the above technical solution, the displacement amplification mechanism further includes a transmission component, which has an input end and an output end. The input end is rotatably connected to the main frame, and the rotation axis of the input end is set in the left-right direction. The output end abuts against the piezoelectric sensor and moves in the up-down direction.

[0019] A transmission component is added to change the direction of the force, making it easier to transmit the force signal to the piezoelectric sensor.

[0020] As a further improvement to the above technical solution, the displacement amplification mechanism further includes a buffer component, the buffer component being arranged in the up-down direction, and the output end being abutted against the piezoelectric sensor through the buffer component.

[0021] Adding a buffer component can reduce the force feedback, so that the output end does not directly act on the piezoelectric sensor. This means that the force transmitted to the grinding gear through the input end will be smaller, thereby reducing the passive gear from being subjected to additional force or experiencing stress changes.

[0022] As a further improvement to the above technical solution, the secondary drive mechanism includes: a secondary drive component; a screw, wherein the secondary drive component drives the screw to rotate, the rotation axis of the screw is arranged in the front-back direction, and the screw is threadedly connected to the secondary frame.

[0023] The secondary drive unit drives the screw to rotate, which in turn causes the secondary frame to slide in the front-to-back direction, thereby changing the position of the driven gear in the front-to-back direction. The above driving method is simple.

[0024] As a further improvement to the above technical solution, it also includes at least two slide rails arranged in the front-back direction, and at least two slide rails arranged at intervals in the left-right direction, wherein the sub-frame and the main frame are slidably connected to the two slide rails in the front-back direction respectively.

[0025] Add slide rails to limit the sliding of the subframe and main frame along the target path. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly explained below. Obviously, the described drawings are only a part of the embodiments of the present invention, and not all of them. Those skilled in the art can obtain other design schemes and drawings based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the overall structure of the present invention from another perspective;

[0029] Figure 3 yes Figure 2 A magnified view of part A in the middle;

[0030] Figure 4 This is a schematic diagram of the subframe section cut open in this invention;

[0031] Figure 5 yes Figure 4 A magnified view of part B in the middle section;

[0032] Figure 6 This is a schematic diagram of the structure after the main drive mechanism is hidden in this invention;

[0033] Figure 7 This is a side view of the present invention;

[0034] Figure 8 yes Figure 7 A cross-sectional view along the AA direction;

[0035] Figure 9 This is a schematic diagram of the structure of the present invention with a portion of it cut open;

[0036] Figure 10 yes Figure 9 A magnified view of part C in the middle;

[0037] Figure 11 This is an exploded view of the disassembly mechanism in this invention.

[0038] In the diagram, 1. Grinding mechanism; 11. Grinding drive component; 111. Grinding motor; 112. Grinding transmission gear set; 12. Grinding gear; 13. Main frame; 2. Main drive mechanism; 21. Main drive component; 22. Pulley assembly; 23. One-way bearing; 3. Sub-frame; 31. Driven gear; 32. Upper seat; 321. Adjustment groove; 322. Clearance groove; 33. Lower seat; 4. Sub-drive mechanism; 41. Sub-drive component; 42. Screw; 5. Displacement amplification mechanism; 51. Piezoelectric sensor; 52. Centralized control module; 53. Transmission. Components; 531, First transmission rod; 5311, Input end; 532, Second transmission rod; 533, Third transmission rod; 534, Fourth transmission rod; 535, Fifth transmission rod; 5351, Output end; 536, First transmission seat; 537, Second transmission seat; 538, Third transmission seat; 539, Fourth transmission seat; 54, Buffer assembly; 6, Locking mechanism; 61, Locking rod; 62, Locking elastic element; 63, Pull rod; 7, Disassembly mechanism; 71, Disassembly sleeve; 72, Disassembly part; 73, Magnet; 8, Slide rail. Detailed Implementation

[0039] The following will clearly and completely describe the concept, specific structure, and technical effects of the present invention in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are all within the scope of protection of the present invention. Furthermore, all connections / linkages mentioned herein do not simply refer to direct connection of components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in this invention can be combined interactively without contradicting each other.

[0040] Reference Figures 1 to 11 This is a specific embodiment of the small-module gear precision repair device based on 3D printing of the present invention.

[0041] A precision finishing device for small-module gears based on 3D printing has mutually orthogonal left-right, front-back, and up-down directions, specifically, the up-down direction is the direction of gravity.

[0042] A small-module gear finishing device based on 3D printing includes a grinding mechanism 1, a main drive mechanism 2, a sub-frame 3, a sub-drive mechanism 4, and a displacement amplification mechanism 5.

[0043] The grinding mechanism 1 includes a grinding drive component 11, a grinding gear 12, and a main frame 13.

[0044] The grinding drive unit 11 is mounted on the main frame 13. Specifically, the grinding drive unit 11 includes a grinding motor 111 and a grinding transmission gear set 112. The grinding motor 111 is connected to the main frame 13, and the grinding transmission gear set 112 is connected to the main frame 13. The grinding motor 111 is connected to the grinding gear 12 through the grinding transmission gear set 112, and the grinding gear 12 and the grinding gear set 112 are connected in a transmission manner. The grinding motor 111 drives the grinding gear 12 and causes the grinding gear 12 to rotate. The extension direction of the rotation axis of the grinding gear 12 is parallel to the extension direction of the left and right directions.

[0045] The main drive mechanism 2 drives the main frame 13 and causes the main frame 13 to slide. The sliding direction of the main frame 13 is set in the front-back direction. Specifically, the main drive mechanism 2 is located on the lower rear side of the main frame 13.

[0046] The passive gear 31 is connected to the sub-frame 3. The sub-frame 3 and the passive gear 31 are detachably connected, and the passive gear 31 is rotatably connected. The extension direction of the rotation axis of the passive gear 31 is parallel to the extension direction of the left and right directions. The grinding gear 12 meshes with the passive gear 31. Specifically, the sub-frame 3 is located on the left side of the main frame 13.

[0047] Specifically, the strength, rigidity, and wear resistance of the grinding gear 12 are all greater than those of the driven gear 31, which is mostly made of photosensitive resin.

[0048] The secondary drive mechanism 4 drives the secondary frame 3 and causes the secondary frame 3 to slide. The sliding direction of the secondary frame 3 is set along the front-to-back direction.

[0049] The displacement amplification mechanism 5 includes a piezoelectric sensor 51 and a central control module 52.

[0050] The piezoelectric sensor 51 abuts against the main frame 13. Specifically, the piezoelectric sensor 51 is located on the rear side of the main frame 13. The piezoelectric sensor 51 is used to convert the force generated when the main frame 13 is displaced into an electrical signal. The piezoelectric sensor 51 adopts SBT641A. The control module 52 is electrically connected to the auxiliary drive mechanism 4, the main drive mechanism 2 and the piezoelectric sensor 51.

[0051] Specifically, the piezoelectric sensor 51 is a sensor based on the piezoelectric effect, and is a self-generating and electromechanical conversion sensor. The sensitive element of the piezoelectric sensor 51 is made of piezoelectric material. When the piezoelectric material is subjected to force, a charge is generated on its surface. This charge is amplified by a charge amplifier and a measuring circuit, and after impedance transformation, it becomes an electrical output proportional to the applied external force. The piezoelectric sensor 51 is used to measure force and non-electrical physical quantities that can be converted into electricity.

[0052] Based on the data such as the number of teeth, module, and displacement of the driven gear 31, the theoretical center distance is calculated according to the parameters of the grinding gear 12 and the driven gear 31.

[0053] The main drive mechanism 2 and the auxiliary drive mechanism 4 are controlled by the central control module 52, thereby changing the distance between the main frame 13 and the auxiliary frame 3 in the front-to-back direction. The main purpose of this is to adjust the center distance between the passive gear 31 and the grinding gear 12 to the theoretical center distance.

[0054] Initialize the piezoelectric sensor 51, de-energize the secondary drive mechanism 4 to achieve self-locking, and prevent the passive gear 31 from rotating.

[0055] Then the passive gear 31 is installed on the sub-frame 3, and the grinding gear 12 is installed on the main frame 13.

[0056] The grinding drive 11 drives the grinding gear 12 to rotate, which in turn causes the passive gear 31 to rotate synchronously, thus achieving the grinding of the gear.

[0057] Since the main frame 13 can slide, and the sliding direction of the main frame 13 is set along the front-to-back direction, the main frame 13 and the piezoelectric sensor 51 are in contact. When the main frame 13 moves, it can detect the change in the center distance between the grinding gear 12 and the driven gear 31. Then, the force generated by the change is converted into an electrical signal by the piezoelectric sensor 51. The control module 52 controls the input current of the main drive mechanism 2 according to the magnitude of the electrical signal, thereby causing the main frame 13 to move in the direction of decreasing center distance, thus forming a closed-loop control. That is, the actual center distance information is amplified and output in real time by the displacement amplification mechanism 5, which helps to improve the accuracy during grinding. When the value of the piezoelectric sensor 51 is 0, it is considered that the processing of the driven gear 31 has met the design requirements.

[0058] In addition, the piezoelectric sensor 51 itself has the advantages of wide bandwidth, high sensitivity, high signal-to-noise ratio, simple structure, reliable operation and light weight.

[0059] Furthermore, the subframe 3 includes an upper seat 32 and a lower seat 33.

[0060] The auxiliary drive mechanism 4 drives the lower seat 33 and causes the lower seat 33 to slide. The sliding direction of the lower seat 33 is set along the front-back direction. The upper seat 32 is rotatably connected to the lower seat 33. The extension direction of the rotation axis of the upper seat 32 is parallel to the extension direction of the up-down direction.

[0061] A locking mechanism 6 is connected between the lower seat 33 and the upper seat 32. The locking mechanism 6 is used to limit the rotation angle of the upper seat 32, thereby changing the extension direction of the rotation axis of the driven gear 31.

[0062] The locking mechanism 6 is used to limit the rotation angle between the upper seat 32 and the lower seat 33, that is, to change the extension direction of the driven gear 31 along the horizontal axis, so that the device can process spur gears, helical gears and bevel gears. Since the above three types of gears are the three most common types of gears in life, it can improve the practicality of the device.

[0063] Furthermore, the locking mechanism 6 includes a locking rod 61, a locking elastic element 62, and a pull rod 63.

[0064] The axis of the locking rod 61 is set in the vertical direction. The top of the locking rod 61 slides through the upper seat 32 in the vertical direction, and the bottom of the locking rod 61 slides through the lower seat 33 in the vertical direction. Specifically, the locking rod 61 is cylindrical.

[0065] The locking elastic element 62 is disposed inside the upper seat 32. The top end of the locking elastic element 62 is connected to the upper seat 32, and the bottom end of the locking elastic element 62 is connected to the locking rod 61. Specifically, the locking elastic element 62 is a spring, and the locking elastic element 62 is sleeved on the locking rod 61.

[0066] Pull rod 63 is connected to the outer wall of locking rod 61. Specifically, the axis of pull rod 63 is perpendicular to the axis of locking rod 61; the end of pull rod 63 away from locking rod 61 extends out of the outer wall of upper seat 32.

[0067] The upper seat 32 has an adjustment groove 321 in the horizontal direction for the pull rod 63 to pass through. Specifically, the upper seat 32 also has a clearance groove 322, which extends in the vertical direction and is connected to the adjustment groove 321. The clearance groove 322 is connected to one end of the adjustment groove 321.

[0068] The locking elastic element 62 causes the locking rod 61 to tend to move downwards, and causes the pull rod 63 to avoid the clearance groove 322 and engage with the adjustment groove 321.

[0069] The upper seat 32 rotates around the lower seat 33 to the target position, and then the locking rod 61 is pulled by the pull rod 63, so that the pull rod 63 rotates to the target position of the adjustment groove 321. At this time, the locking elastic element 62 pushes the locking rod 61 to move downward, and simultaneously pushes the pull rod 63 to press against the adjustment groove 321, thereby limiting the relative rotation angle of the upper seat 32 and the lower seat 33. The above locking method is relatively simple and easy for users to use.

[0070] Furthermore, the main drive mechanism 2 includes a main drive component 21 and a pulley assembly 22.

[0071] The main drive unit 21 is connected to a one-way bearing 23, and the rotation axis of the one-way bearing 23 is set in the vertical direction. The main drive unit 21 is a motor.

[0072] One-way bearing 23 drives the pulley assembly 22, and the pulley assembly 22 and the main frame 13 are connected in a transmission manner. Specifically, the pulley assembly 22 is an existing pulley structure.

[0073] The actual center distance after installing the passive gear 31 and the grinding gear 12 will be greater than the theoretical center distance. Since the auxiliary drive mechanism 4 has been locked, only the main drive mechanism 2 can be adjusted during the adjustment. That is, the main drive mechanism 2 actually needs to push the main frame 13 to move in the direction of decreasing center distance. Therefore, in order to better ensure that the main frame 13 moves along the target path and ensure the cutting force, a one-way bearing 23 is added so that the main frame 13 drives the grinding gear 12 to move in the direction of decreasing center distance, preventing the pulley group 22 from reversing and causing the cutting force to decrease.

[0074] Furthermore, the grinding gear 12 is detachably connected to the main frame 13 via the disassembly mechanism 7, and the driven gear 31 is detachably connected to the auxiliary frame 3 via the disassembly mechanism 7.

[0075] A disassembly mechanism 7 is added to facilitate the installation of the grinding gear 12 and the driven gear 31.

[0076] Furthermore, the disassembly mechanism 7 includes a disassembly sleeve 71, a disassembly component 72, and a magnet 73.

[0077] The disassembly sleeve 71 is rotatably connected to the main frame 13 or the auxiliary frame 3, and the rotation axis of the disassembly sleeve 71 is set in the left and right direction.

[0078] One end of the disassembly piece 72 extends out of the outer wall of the main frame 13 or the auxiliary frame 3. One end of the disassembly piece 72 is connected to the driven gear 31 or the driving gear. The other end of the disassembly piece 72 is inserted into and locked in the disassembly sleeve 71.

[0079] Magnet 73 is connected to the end of disassembly sleeve 71 away from disassembly component 72. Magnet 73 and disassembly component 72 are magnetically attracted to each other. Specifically, disassembly component 72 is an external hexagonal shaft, corresponding to the disassembly mechanism 7 on the main frame 13. Grinding transmission gear set 112 is connected to disassembly sleeve 71.

[0080] In use, the magnet 73 is removed, and then the disassembly part 72 is pulled out from the disassembly sleeve 71 to replace the driven gear 31 or grind the gear 12. The above replacement method is relatively convenient.

[0081] Furthermore, the displacement amplification mechanism 5 also includes a transmission component 53.

[0082] The transmission assembly 53 is provided with an input end 5311 and an output end 5351. The input end 5311 is rotatably connected to the main frame 13. The rotation axis of the input end 5311 is set along the left and right direction. The output end 5351 abuts against the piezoelectric sensor 51 and can move along the up and down direction.

[0083] A transmission component 53 is added to change the direction of the force, so as to facilitate the transmission of the force signal to the piezoelectric sensor 51.

[0084] Specifically, the transmission assembly 53 includes a first transmission rod 531, a second transmission rod 532, a third transmission rod 533, a fourth transmission rod 534, a fifth transmission rod 535, a first transmission seat 536, a second transmission seat 537, a third transmission seat 538, and a fourth transmission seat 539. One end of the first transmission rod 531 is rotatably connected to the main frame 13, and the other end of the first transmission rod 531 is rotatably connected to the bottom end of the second transmission rod 532. The rotation axis of the first transmission rod 531 is set in the left-right direction, and the input end 5311 is located at one end of the first transmission rod 531. The first transmission seat 536 is located behind the main frame 13, and the second transmission rod 532 is slidably connected to the first transmission seat 536 in the up-down direction. The top end of the second transmission rod 532 is rotatably connected to the second transmission seat 537. The rotation axis at the top is set in the left-right direction; the third transmission seat 538 is located to the left of the second transmission seat 537; the front end of the third transmission rod 533 is rotatably connected to the third transmission seat 538, the rear end of the third transmission rod 533 is rotatably connected to the front end of the fourth transmission rod 534, the rotation axis of the third transmission rod 533 is set in the left-right direction, and the third transmission rod 533 is slidably connected to the second transmission seat 537; the rear end of the fourth transmission rod 534 is rotatably connected to the fifth transmission rod 535, the rotation axis of the fourth transmission rod 534 is set in the left-right direction; the fifth transmission rod 535 is set in the vertical direction; the fourth transmission seat 539 is located behind the first transmission seat 536, the fifth transmission rod 535 is slidably connected to the fourth transmission seat 539 in the up-down direction, and the bottom end of the fifth transmission rod 535 is the output end 5351.

[0085] Furthermore, the displacement amplification mechanism 5 also includes a buffer assembly 54.

[0086] The buffer component 54 is set in the vertical direction, and the output terminal 5351 is abutted against the piezoelectric sensor 51 through the buffer component 54.

[0087] Specifically, the buffer component 54 can be a spring, damper, or other structure.

[0088] Adding a buffer component 54 can reduce the force feedback, so that the output end 5351 will not directly act on the piezoelectric sensor 51. That is, the force transmitted to the grinding gear 12 through the input end 5311 will be smaller, thereby reducing the passive gear 31 from being subjected to additional force or experiencing stress changes.

[0089] Furthermore, the secondary drive mechanism 4 includes a secondary drive component 41 and a screw 42; specifically, the secondary drive component 41 is a motor; the secondary drive component 41 drives the connected screw 42 and causes the screw 42 to rotate, and the rotation axis of the screw 42 is set in the front-back direction; the screw 42 and the secondary frame 3 are threadedly connected, specifically, the screw 42 and the lower seat 33 are threadedly connected.

[0090] The auxiliary drive unit 41 drives the screw 42 to rotate, which in turn drives the auxiliary frame 3 to slide in the front-back direction, thereby changing the position of the driven gear 31 in the front-back direction. The above driving method is simple.

[0091] Furthermore, it also includes slide rails 8, which are arranged in the front-to-back direction. There are at least two slide rails 8, which are spaced apart in the left-to-right direction. The main frame 13 and the secondary frame 3 are slidably connected to the two slide rails 8 respectively. Specifically, the lower seat 33 is slidably connected to the corresponding slide rail 8.

[0092] A slide rail 8 is added to limit the sliding of the sub-frame 3 and the main frame 13 along the target path; that is, the main frame 13 can only slide in the front-back direction, and similarly, the sub-frame 3 can only slide in the front-back direction.

[0093] In summary, in actual use, the theoretical center distance is calculated based on the number of teeth, module, and displacement of the driven gear 31, and the parameters of the grinding gear 12 and the driven gear 31.

[0094] The main drive mechanism 2 and the auxiliary drive mechanism 4 are controlled by the central control module 52, thereby changing the distance between the main frame 13 and the auxiliary frame 3 in the front-to-back direction. The main purpose of this is to adjust the center distance between the passive gear 31 and the grinding gear 12 to the theoretical center distance.

[0095] Initialize the piezoelectric sensor 51, de-energize the secondary drive mechanism 4 to achieve self-locking, and prevent the passive gear 31 from rotating.

[0096] Then the passive gear 31 is installed on the sub-frame 3, and the grinding gear 12 is installed on the main frame 13.

[0097] The grinding drive 11 drives the grinding gear 12 to rotate, which in turn causes the passive gear 31 to rotate synchronously, thus achieving the grinding of the gear.

[0098] Since the main frame 13 can slide, and the sliding direction of the main frame 13 is set along the front and back direction, the main frame 13 and the piezoelectric sensor 51 are in contact. When the main frame 13 moves, it can react to the change in the center distance between the grinding gear 12 and the driven gear 31. Then, the force generated by the change is converted into an electrical signal through the piezoelectric sensor 51. The central control module 52 controls the input current of the main drive mechanism 2 according to the magnitude of the electrical signal, thereby causing the main frame 13 to move in the direction of decreasing center distance, thus forming a closed-loop control. That is, the actual center distance information is output in real time through the displacement amplification mechanism 5, which helps to improve the accuracy during grinding.

[0099] In addition, the piezoelectric sensor 51 itself has the advantages of wide bandwidth, high sensitivity, high signal-to-noise ratio, simple structure, reliable operation and light weight.

[0100] In addition, the locking mechanism 6 is used to limit the rotation angle between the upper seat 32 and the lower seat 33, that is, to change the extension direction of the driven gear 31 along the horizontal axis, so that the device can process spur gears, helical gears and bevel gears. Since the above three types of gears are the three most common types of gears in life, it can improve the practicality of the device.

[0101] Furthermore, the addition of the buffer component 54 can reduce the force feedback, so that the output end 5351 will not directly act on the piezoelectric sensor 51. That is, the force transmitted to the grinding gear 12 through the input end 5311 will be smaller, thereby reducing the situation where the passive gear 31 is subjected to additional force or stress change.

[0102] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A small-module gear precision repair device based on 3D printing, which has mutually orthogonal front-back, left-right, and up-down directions, characterized in that, include: A grinding mechanism includes a grinding drive, a grinding gear, and a main frame. The grinding drive is connected to the main frame and drives the grinding gear to rotate. The rotation axis of the grinding gear is arranged in the left-right direction. The main drive mechanism drives the main frame to slide in the front-to-back direction; A secondary frame is provided, and a driven gear is detachably and rotatably connected to the secondary frame. The rotation axis of the driven gear is set in the left-right direction, and the grinding gear meshes with the driven gear. A secondary drive mechanism drives the secondary frame to slide in the front-to-back direction; The displacement amplification mechanism includes a piezoelectric sensor and a centralized control module. The displacement amplification mechanism also includes a transmission component, which has an input end and an output end. The input end is rotatably connected to the main frame. The rotation axis of the input end is set in the left-right direction, and the output end moves in the up-down direction. The transmission assembly includes a first transmission rod, a second transmission rod, a third transmission rod, a fourth transmission rod, a fifth transmission rod, a first transmission seat, a second transmission seat, a third transmission seat, and a fourth transmission seat. One end of the first transmission rod is rotatably connected to the main frame, and the other end of the first transmission rod is rotatably connected to the bottom end of the second transmission rod. The rotation axis of the first transmission rod is set along the left-right direction, and the input end is located at one end of the first transmission rod. The first transmission seat is located behind the main frame, and the second transmission rod is slidably connected to the first transmission seat along the up-down direction. The top end of the second transmission rod is rotatably connected to the second transmission seat, and the rotation axis of the top end of the second transmission rod is set along the left-right direction. The third transmission seat is located to the left of the second transmission seat; the front end of the third transmission rod is rotatably connected to the third transmission seat, and the rear end of the third transmission rod is rotatably connected to the front end of the fourth transmission rod. The rotation axis of the third transmission rod is set along the left-right direction, and the third transmission rod is slidably connected to the second transmission seat; the rear end of the fourth transmission rod is rotatably connected to the fifth transmission rod, and the rotation axis of the fourth transmission rod is set along the left-right direction; the fifth transmission rod is set along the vertical direction; the fourth transmission seat is located behind the first transmission seat, and the fifth transmission rod is slidably connected to the fourth transmission seat along the up-down direction. The bottom end of the fifth transmission rod is the output end. The displacement amplification mechanism also includes a buffer component, the buffer component being arranged in the vertical direction. The output end is abutted against the piezoelectric sensor through the buffer component. The central control module is electrically connected to the piezoelectric sensor, the main drive mechanism, and the auxiliary drive mechanism. The piezoelectric sensor converts the force signal generated by the change in the movement of the main frame into an electrical signal. The central control module controls the magnitude of the input current of the main drive mechanism according to the magnitude of the electrical signal, thereby causing the main frame to move.

2. The small-module gear precision repair device based on 3D printing according to claim 1, characterized in that, The subframe includes: The lower seat is driven by the auxiliary drive mechanism to slide in the front-to-back direction; The upper seat is rotatably connected to the lower seat. The rotation axis of the upper seat is set in the vertical direction. A locking mechanism is connected between the upper seat and the lower seat to limit the rotation angle of the upper seat.

3. The small-module gear precision repair device based on 3D printing according to claim 2, characterized in that, The locking mechanism includes: A locking rod is provided in the vertical direction, with its top end passing through the upper seat and its bottom end passing through the lower seat; A locking elastic element is disposed inside the upper seat, and the two ends of the locking elastic element are respectively connected to the upper seat and the locking rod; A pull rod is connected to the locking rod and extends out of the outer wall of the upper seat. The upper seat has an adjustment groove in the horizontal direction for the pull rod to pass through. The locking elastic element causes the locking rod to tend to move downward and makes the pull rod lock in the adjustment groove.

4. The small-module gear precision repair device based on 3D printing according to claim 1, characterized in that, The main drive mechanism includes: The main drive unit is connected to a one-way bearing, and the rotation axis of the one-way bearing is arranged in the vertical direction. The pulley assembly is driven by the one-way bearing and is connected to the main frame body in a transmission manner.

5. The small-module gear precision repair device based on 3D printing according to claim 1, characterized in that, The grinding gear and the driven gear are detachably connected to the main frame and the sub-frame respectively via a disassembly mechanism.

6. The small-module gear precision repair device based on 3D printing according to claim 5, characterized in that, The disassembly mechanism includes: The disassembly sleeve is rotatably connected to the main frame or the auxiliary frame, and the rotation axis of the disassembly sleeve is set in the left-right direction; The disassembly component has one end connected to the driven gear or the grinding gear, and the other end of the disassembly component is engaged with the disassembly sleeve. A magnet is attached to the disassembly sleeve, and the magnet and the disassembly component are magnetically attracted to each other.

7. The small-module gear precision repair device based on 3D printing according to claim 1, characterized in that, The secondary drive mechanism includes: Secondary drive unit; The screw is driven to rotate by the auxiliary drive component. The rotation axis of the screw is set in the front-to-back direction. The screw is threadedly connected to the auxiliary frame.

8. A small-module gear precision repair device based on 3D printing according to claim 1, characterized in that, It also includes at least two slide rails arranged in the front-to-back direction, and at least two slide rails arranged at intervals in the left-to-right direction, wherein the sub-frame and the main frame are slidably connected to the two slide rails in the front-to-back direction respectively.

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