Two-stage pinning mechanism and main and auxiliary gear assembly method

Abstract

The present invention discloses a two-stage pinning mechanism and a main and auxiliary gear assembly method, which are applied in the field of mechanical transmission technology. The key points of its technical solution are: a two-stage pinning mechanism, comprising a vertically installed mounting seat and a telescopic component fixedly connected to the top of the mounting seat, the telescopic end of the telescopic component is fixedly connected to a mounting plate, the end of the mounting plate away from the telescopic component is provided with a clamping component based on a plurality of clamping claws to clamp a hollow pin, and an elastic abutting component that abuts the hollow pin and drives the hollow pin to insert into the pin hole of the main gear, the clamping component is fixedly connected to a plurality of supporting blocks that abut the end face of the main gear to realize the complete insertion of the hollow pin into the pin hole of the main gear; the technical effect is: ensuring that the hollow shaft is completely inserted into the pin hole without affecting the assembly effect of the main and auxiliary gears.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical transmission, and in particular to a two-stage pinning mechanism and a main and auxiliary gear assembly method. Background Art

[0002] Backlash is the gap between the teeth of meshing gears. One of the most precise processing methods in gear manufacturing is wire cutting, but it still cannot eliminate the backlash during gear transmission because the tooth thickness error is the main source of backlash. During gear transmission, if the gear rotates clockwise first and then counterclockwise, the meshing gears will not rotate at the beginning of the counterclockwise rotation, and will only start to rotate after a small angle, which will cause the tooth surfaces to collide with each other when the gears are reversed, thereby reducing the service life of the gears.

[0003] Nowadays, in order to eliminate the backlash of gear transmission, the most common solution is double gear backlash elimination, that is, the purpose of eliminating backlash is achieved by connecting a pair of main and auxiliary gears and setting a device that can cause circumferential relative torsion dislocation between the main and auxiliary gears. The connection methods of the main and auxiliary gears are mainly divided into rigid connection and elastic connection. The elastic connection is based on setting a high-force spring or arc spring between the gears, relying on elastic force to clamp the teeth of the main and auxiliary gears, thereby achieving the purpose of eliminating the gap.

[0004] During the assembly process of the main and sub gears, the sub gear is first fixed on the mounting platform, and then one end of the retaining spring is clamped on the pin shaft set on the sub gear, and then the main gear is installed on the sub gear, and the other end of the retaining spring is clamped on the pin shaft set on the main gear. Then, the main gear is rotated a certain angle, and when it is necessary to overcome the elastic force of the retaining spring, the hollow pin is passed through the pin hole opened on the main gear and connected to the pin shaft set on the sub gear to complete the installation of the main and sub gears.

[0005] The commonly used pin insertion method is to use a manipulator or a mechanical gripper to grab one end of the pin shaft, and then insert the pin shaft into the pin hole of the main gear. However, this will inevitably expose a portion of the pin shaft outside the end of the main gear and cannot be fully inserted into the pin hole. This may reduce the assembly effect of the main and auxiliary gears and affect the subsequent use of the gears. Summary of the invention

[0006] The first object of the present invention is to provide a two-stage pin pressing mechanism, which has the advantage of ensuring that the hollow shaft is fully inserted into the pin hole without affecting the assembly effect of the main and auxiliary gears.

[0007] The above-mentioned technical purpose of the present invention is achieved through the following technical solutions: a two-stage pin pressing mechanism, comprising a vertically installed mounting seat and a telescopic component fixedly connected to the top of the mounting seat, the telescopic end of the telescopic component is fixedly connected to a mounting plate, and a plurality of guide columns matched with the guide holes at the top of the mounting seat are fixedly connected to the mounting plate; the end of the mounting plate away from the telescopic component is provided with a clamping component based on a plurality of clamping claws to clamp a hollow pin, and an elastic abutting component that abuts the hollow pin and drives the hollow pin to insert into the pin hole of the main gear; the clamping component is fixedly connected with a plurality of support blocks that abut the end face of the main gear to realize the complete insertion of the hollow pin into the pin hole of the main gear, and also includes a mounting base for accommodating the installation of the main gear and the auxiliary gear, and a positioning and clamping mechanism for clamping the auxiliary gear and positioning the retaining spring in the auxiliary gear, and a rotating mechanism for overcoming the elastic force of the retaining spring and driving the main gear to rotate to realize the rotational docking of the main gear and the auxiliary gear is fixedly provided on the mounting base.

[0008] Through the above technical scheme, before performing the pinning operation, first place the secondary gear in the mounting base and use the positioning and clamping assembly to clamp the secondary gear and fix it, and at the same time position the card in the secondary gear to ensure that the installation position of the retaining spring is correct, and then the main gear is placed on the secondary gear coaxially, and then the rotating mechanism drives the main gear to rotate a certain angle so that the pin holes between the main gear and the secondary gear coincide, and then the pinning operation is performed to realize the rotational docking of the main and secondary gears, and then the telescopic assembly fixedly connected to the top of the mounting seat drives the clamping assembly arranged on the mounting plate to move downward, thereby driving the clamping assembly based on the hollow pin clamped by a number of clamping claws to move downward and insert it into the pin holes of the main and secondary gears to complete. The first stage of the pinning process, but because the clamping claws of the clamping assembly must clamp one end of the hollow pin to clamp it, some of the hollow pins will inevitably be unable to be inserted into the pin holes during the first stage of the pinning process, thus being exposed to the outside of the main and auxiliary gears, thereby affecting the assembly effect of the main and auxiliary gears. Therefore, after the first stage of the pinning process is completed, the support block fixed on the clamping assembly abuts against the end face of the main gear, which plays a supporting and stabilizing role for the second stage of the pinning process. Subsequently, the elastic abutting assembly abuts against one end of the hollow pin and presses the hollow pin to continue to insert it into the pin hole until the hollow pin is completely immersed in the end face of the main gear to complete the second stage of the pinning process, thereby ensuring that the hollow shaft can be fully inserted into the pin hole, thereby ensuring the assembly effect of the main and auxiliary gears.

[0009] The present invention is further configured as follows: the elastic abutment assembly includes a connecting plate and a push rod fixedly connected to one end of the connecting plate away from the mounting plate and used to abut against a hollow pin; the connecting plate is evenly and fixedly connected to a plurality of elastic downward pressure columns around the push rod; the telescopic end of the elastic downward pressure column is fixedly connected to a first mounting block for connecting the clamping assembly; the first mounting block is provided with a through hole for the push rod to pass through.

[0010] Through the above technical scheme, when the second stage of the pinning process is carried out, the abutting end face of the support block first abuts against the end face of the main gear. At this time, the support block and the clamping assembly can no longer move downward. Then the telescopic assembly continues to drive the connecting plate to move downward to compress a number of elastic downward pressure columns fixed on the connecting plate, thereby driving the push rod fixed on the end of the connecting plate away from the mounting plate, and the push rod for abutting the hollow pin moves downward, thereby driving the hollow pin to continue to be pressed into the pin hole. When the pinning is completed, the telescopic assembly retracts and first the elastic downward pressure column returns to its initial state, thereby driving the push rod to retract, thereby ensuring the pinning effect.

[0011] The present invention is further configured as follows: the ejector rod includes a connecting portion fixedly connected to the connecting plate and an ejector portion extending from the connecting portion in a direction away from the connecting plate, and the end of the ejector portion away from the connecting plate is provided with a protrusion for penetrating a ejector block in a hollow pin.

[0012] Through the above technical solution, a protruding ejector block for penetrating the hollow pin is provided at the end of the ejector part away from the connecting plate. This ensures the stability of the ejector rod in pushing the hollow pin, and avoids shaking when the ejector rod abuts against the hollow pin and is inserted into the pin hole, thereby affecting the pin pressing effect. On the other hand, an ejector block is provided on the ejector part. When the pin is pressed, the ejector block follows the hollow pin into the pin hole until the bottom end face of the ejector part touches the end face of the main gear. At this time, the hollow pin is completely immersed in the end face of the main gear, thereby ensuring the assembly effect of the main and auxiliary gears.

[0013] The present invention is further configured as follows: the clamping assembly includes a second mounting block fixedly connected to the first mounting block, the second mounting block is provided with a through slot for the push rod to pass through, and a plurality of clamping grippers for clamping a hollow pin are connected in the through slot and symmetrically rotated along the central axis plane of the push rod.

[0014] Through the above technical solution, a through groove is opened on the second mounting block so that the push rod can pass through and abut against the hollow pin. A plurality of clamping grippers are symmetrically connected to the through groove along the center axis of the push rod. The clamping grippers are used to grasp only one end of the hollow pin. During the first stage of pinning, the stability of the hollow pin is ensured while the center axis of the hollow pin can always be in a straight line with the center axis of the pin holes on the main and auxiliary gears, thereby ensuring the stability of the first stage of pinning.

[0015] The present invention is further configured as follows: the clamping gripper includes a rotating part rotatably connected to the through groove and a clamping part fixedly connected to the rotating part for clamping a hollow pin, and an elastic member for limiting the loosening of the clamping gripper is fixedly connected between the rotating part and the support block.

[0016] Through the above technical scheme, the rotating part is rotatably connected in the through groove, the clamping part fixedly connected to the rotating part is used to clamp the pin shaft surface of the hollow pin, and the elastic part used to limit the loosening of the clamping gripper is fixedly connected between the rotating part and the support block. While ensuring that the clamping gripper clamps the hollow pin stably, it is ensured that when the second stage of the pin pressing process is carried out, the push rod needs to overcome the pressure of the elastic part to open several clamping grippers so as to push the hollow pin into the pin hole, thereby preventing the hollow pin from slipping from the clamping gripper.

[0017] The present invention is further configured as follows: the support block comprises a support portion and an abutment portion fixedly connected to the support portion for abutting against an end face of the main gear.

[0018] Through the above technical solution, the support part fixedly connected to the second support block plays a supporting role for the support block, and the abutment part arranged on the end face of the support part away from the first support block is used to abut against the end face of the main gear, thereby ensuring the stability of the abutment and thus ensuring the stability of the second part pinning process.

[0019] The present invention is further configured such that: a rotation arc of an end face of the clamping portion away from the rotating portion is lower than an abutting end face of the abutting portion abutting against the main gear.

[0020] Through the above technical solution, when the second stage of the pinning process is carried out, the abutment end face of the abutment portion of the support block is attached to the end face of the main gear, and then the push rod moves downward to open the clamping gripper to press the hollow pin into the pin hole of the main and auxiliary gears. When the clamping gripper is opened, the clamping portion rotates around the rotation axis of the rotating portion. If the rotation arc of the end face of the clamping portion away from the rotating portion exceeds the abutment end face of the abutment portion, the clamping portion will interfere with the end face of the main gear, thereby affecting the second stage of the pinning process.

[0021] The present invention is further configured as follows: a pressure sensing component for detecting the magnitude of downward pressure is fixedly disposed between the connecting plate and the mounting plate.

[0022] Through the above technical solution, a pressure sensing component for detecting the size of the downward pressure is set between the connecting plate and the mounting plate. If the downward pressure exceeds the specified range, it is likely that the pin holes of the main and auxiliary gears do not overlap or the hollow pin cannot be accurately pressed into the pin holes of the main and auxiliary gears. If the downward pressure continues, it is likely to cause damage to the pin pressing mechanism or the main and auxiliary gears, so damage to the pin pressing mechanism should be avoided.

[0023] The second object of the present invention is to provide a method for assembling main and auxiliary gears, which has the advantage of ensuring that the hollow shaft is fully inserted into the pin hole without affecting the assembly effect of the main and auxiliary gears.

[0024] The above technical objectives of the present invention are achieved through the following technical solutions:

[0025] Step 1, place the secondary gear in the mounting base and clamp one end of the circlip on the pin provided on the secondary gear, and install the main gear on the secondary gear so that the other end of the circlip is clamped on the pin provided on the main gear;

[0026] Step 2: Use the positioning and clamping mechanism to clamp the main gear and the auxiliary gear into the mounting base, and fix the main gear on the rotating mechanism;

[0027] Step 3, start the rotating mechanism to drive the main gear to rotate a certain angle so that the central axes of the pin holes provided on the main gear and the auxiliary gear for accommodating the hollow pins are in a straight line;

[0028] Step 4, start the telescopic assembly, the telescopic assembly drives the clamping assembly to move downward along the vertical direction, and the hollow pin clamped by the clamping assembly penetrates into the pin hole provided in the main gear until the abutting end face of the support block abuts against the top end face of the main gear to complete the first stage of pinning action;

[0029] Step 5, the telescopic assembly continues to move downward in the vertical direction to drive the connecting plate to move downward, the elastic lower pressure column is compressed to drive the push rod downward to push the hollow pin, the ejection part of the push rod overcomes the elastic force of the elastic member to open the clamping gripper and push the hollow pin to penetrate into the pin hole of the secondary gear until the hollow pin is fully inserted, thus completing the second stage of the pin pressing action;

[0030] Step 6: The telescopic assembly retracts, driving the elastic downward pressure column and the push rod to return, completing the assembly process of the main and auxiliary gears.

[0031] Through the above technical solution, the pin pressing process is divided into two steps, so as to avoid the situation in which the clamping assembly clamps a part of the hollow pin, causing the hollow pin to be unable to be fully inserted into the pin hole and thus exposed to the outside of the main and auxiliary gears, thereby affecting the assembly effect of the main and auxiliary gears.

[0032] In summary, the present invention has the following beneficial effects:

[0033] 1. The pinning process is divided into two steps to avoid the situation that the hollow pin cannot be fully inserted into the pin hole due to the clamping assembly clamping a part of the hollow pin, thus being exposed outside the main and auxiliary gears, thus affecting the assembly effect of the main and auxiliary gears;

[0034] 2. A protruding ejector block is provided at the end of the ejector part away from the connecting plate, which is used to penetrate the hollow pin. This ensures the stability of the ejector rod in pushing the hollow pin, and at the same time ensures that during the second pinning process, the ejector block will follow the hollow pin into the pin hole until the bottom end face of the ejector part touches the end face of the main gear, ensuring that the hollow pin is completely immersed in the end face of the main gear, thereby ensuring the assembly effect of the main and auxiliary gears. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1It is a schematic diagram of the overall structure of this embodiment;

[0036] Figure 2 yes Figure 1 A magnified schematic diagram of part A;

[0037] Figure 3 is a half-section schematic diagram of the clamping assembly of this embodiment;

[0038] Figure 4 is a schematic diagram of the clamping gripper of this embodiment;

[0039] Figure 5 It is a schematic structural diagram of the main and auxiliary gear assembly equipment of this embodiment.

[0040] 1. Mounting seat; 2. Telescopic assembly; 21. Mounting plate; 22. Guide column; 23. L-shaped mounting block; 24. T-shaped mounting block; 3. Elastic abutment assembly; 31. Connecting plate; 32. Ejector rod; 321. Connecting portion; 322. Ejector portion; 323. Ejector block; 33. Elastic downward pressure column; 34. First mounting block; 36. Distance detection sensor; 4. Clamping assembly; 41. Second mounting block; 42. Through groove; 43. Clamping gripper; 431. Rotating portion; 432. Clamping portion; 433. Elastic member; 434. V-shaped groove; 44. Detection optical fiber; 5. Support block; 51. Support portion; 52. Abutment portion; 6. Pressure sensing assembly; 7. Mounting base; 8. Positioning and clamping mechanism; 9. Rotating mechanism; 10. Main gear; 11. Sub gear; 12. Hollow pin. DETAILED DESCRIPTION

[0041] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0042] Embodiment 1:

[0043] refer to Figure 1, a two-stage pinning mechanism, comprising a mounting seat 1 fixedly installed along the vertical direction, the mounting seat 1 is an unclosed frame-type structure, a telescopic component 2 is fixedly provided at the top of the mounting seat 1 away from the ground, a square mounting plate 21 is fixedly connected to the telescopic rod at the telescopic end of the telescopic component 2, and two guide columns 22 that cooperate with the guide holes opened at the top of the mounting seat 1 are symmetrically fixedly connected at both ends of the square mounting plate 21, thereby playing a guiding role for the mounting plate 21, a clamping component 4 for clamping and fixing a hollow pin 12 and an elastic abutment component 3 for inserting the hollow pin 12 into the pin holes of the main and auxiliary gears to achieve the main and auxiliary gears docking and eliminating the gap are provided at one end of the mounting plate 21 away from the telescopic component 2, a number of support blocks 5 based on the end face of the abutting main gear 10 to achieve the complete insertion of the hollow pin 12 into the pin hole of the main gear 10 are symmetrically fixedly connected to the clamping component 4, and a pressure sensing component 6 for detecting the size of the downward pressure to avoid damage to the pinning mechanism or the main and auxiliary gears is fixedly provided between the connecting plate 31 and the elastic abutment component 3.

[0044] refer to Figure 2 Specifically, an L-shaped mounting block 23 in an inverted L shape is symmetrically fixed with bolts in the middle of the mounting plate 21, and a cavity in an inverted T shape is provided between the L-shaped mounting blocks 23 at both ends. A T-shaped mounting block 24 matching the cavity is fixedly connected to the end of the telescopic rod of the telescopic assembly 2. When the mounting plate 21 and several components fixed on the mounting plate 21 are fixedly connected to the telescopic end of the telescopic assembly 2, it is only necessary to insert the T-shaped mounting block 24 into the cavity and tighten it. The installation is convenient and the connection is stable. In this embodiment, the telescopic assembly 2 uses standard electric cylinder parts to ensure the stability and accuracy of the telescopic mounting plate 21, but it is not limited to the use of electric cylinders. Hydraulic cylinders or air cylinders with hard limit mechanisms can also be used.

[0045] refer to Figure 2 and Figure 3Specifically, the elastic abutment component 3 includes a connecting plate 31 that is mounted and fixed on the end of the pressure sensing component 6 away from the mounting plate 21 at a distance therefrom. A push rod 32 for abutting the hollow pin 12 is fixedly provided at the center position of the end of the connecting plate 31 away from the mounting plate 21 based on bolts. At the same time, a number of elastic downward pressure columns 33 are evenly spaced around the push rod 32 at the same end of the connecting plate 31. The elastic downward pressure column 33 includes a hollow cylinder fixedly connected to the connecting plate 31, and a telescopic rod is slidably connected to the end of the hollow cylinder away from the connecting plate 31. A spring that abuts against one end of the telescopic rod and plays an elastic abutment role on the telescopic rod is provided in the cavity of the hollow cylinder. The end of the telescopic rod of 33 is fixedly provided with a first mounting block 34 for connecting the clamping assembly 4, and the top two ends of the first mounting block 34 are provided with a stepped groove for connecting the telescopic rod, and part of the telescopic rod is inserted into the stepped groove and fixed, and a square through hole is provided at the center of the first mounting block 34 to cooperate with the push rod 32 so as to allow the push rod 32 to pass through, and a distance detection sensor 36 for detecting the distance between the elastic abutment assembly 3 and the end faces of the main and auxiliary gears is fixedly provided based on a sheet metal part at one end of the connecting plate 31 away from the mounting plate 21, so as to cooperate with the telescopic assembly 2 to realize real-time and accurate detection of the distance between the hollow pin 12 and the end faces of the main and auxiliary gears, so as to prevent the telescopic assembly 2 from descending too fast and hitting the end face of the main gear 10. In this embodiment, two elastic downward pressure rods are provided, which are symmetrically fixedly connected at both ends of the connecting plate 31, and the distance detection sensor 36 uses a photoelectric distance sensor to realize fast, real-time and accurate measurement of distance height information based on photoelectric reflection, but is not limited to the use of a photoelectric distance sensor, and a sensor component that can accurately measure distance height information in real time, such as an ultrasonic distance sensor, can also be used.

[0046] refer to Figure 3 Specifically, the ejector rod 32 is a long strip structure, including a connecting portion 321 fixedly connected to the connecting plate 31 and an ejection portion 322 extending from the connecting portion 321 in a direction away from the connecting plate 31. The connecting portion 321 is a square block structure, inserted into a directional through hole connected to the first mounting block 34, and the ejection portion 322 extends from the connecting portion 321 in an arc shape, and the cross-sectional area gradually decreases. The ejection portion 322 is in a V-shaped structure at the end position away from the connecting portion 321, and the bottom of the ejection portion 322 is rounded. The fillet diameter is set to be larger than the pin hole diameter on the main and sub gears, and a protruding cylindrical top block 323 is provided at the bottom center of the ejection part 322. The top block 323 is inserted into the hollow pin 12 to prevent the ejector 32 from shaking when the hollow pin 12 is inserted into the pin hole, thereby affecting the pinning effect. At the same time, the top block 323 will follow the hollow pin 12 into the pin hole during the pinning process until the bottom end face of the ejection part 322 touches the end face of the main gear 10, thereby ensuring that the hollow pin 12 can be completely immersed in the end face of the main gear 10.

[0047] refer to Figure 3 and Figure 4Specifically, the clamping assembly 4 includes a second mounting block 41 fixedly connected to the bottom of the first mounting block 34 by bolts, a through slot 42 for the push rod 32 to pass through is provided at the center position of the second mounting block 41, the width of the through slot 42 is longer than the width of the through hole provided on the first mounting block 34, and a rotating hole is symmetrically provided along the central axis of the long side of the second mounting block 41, a rotating shaft is inserted in the rotating hole, and a clamping gripper 43 for clamping the hollow pin 12 is rotatably connected to the rotating shaft in the through slot 42. Specifically, the clamping gripper 43 includes a rotating portion 431 rotatably connected to a rotating shaft in the through-groove 42, the rotating portion 431 is a directional block structure, the width of the rotating portion 431 is the same as the width of the through-groove 42, thereby ensuring the stability of the rotation of the rotating portion 431, and a clamping portion 432 for clamping the hollow pin 12 is fixedly connected to the rotating portion 431, the clamping portion 432 is obliquely arranged inwardly, and the inner oblique surface of the clamping portion 432 cooperates with the oblique surface at the bottom of the push rod 32 to facilitate the push rod 32 to push the clamping portion 432, and finally the inner end faces of the clamping portion 432 arranged in the through-groove 42 are in contact with each other, and a V-shaped groove for accommodating the hollow pin 12 is provided along the vertical direction on the inner end faces of the clamping portion 432. When the end face of the rotating part 431 in the through groove 42 is fitted, the symmetrical V-shaped grooves form a diamond groove, and the pin shaft surface of the hollow pin 12 is symmetrical with the four sides of the diamond groove, ensuring that the hollow pin 12 can be set in the vertical direction when clamped, and an elastic member 433 is fixedly connected between the outer end face of the rotating part 431 close to the clamping part 432 and the inner end face of the support block 5 for limiting the rotation of the clamping part 432 and thereby limiting the opening of the clamping gripper 43. When the push rod 32 is pushed downward, the end of the top connection part of the push rod 32 presses the inner end face of the clamping part, thereby overcoming the elastic force of the elastic member 433 and causing the clamping gripper 43 to rotate along the rotating shaft to achieve the purpose of spreading the clamping part 432, thereby contacting and fixing the hollow pin 12. Meanwhile, a detection optical fiber 44 for detecting whether there is a hollow pin 12 in the clamping gripper 43 is fixedly provided on the second mounting block 41. If the detection optical fiber 44 does not detect that the clamping gripper 43 has grasped the hollow pin 12, the entire device will sound an alarm and stop moving to avoid damage to the device. In this embodiment, the elastic member 433 is a spring.

[0048] refer to Figure 3 Specifically, the support block 5 has an upright Z-shaped structure, including an L-shaped support portion 51 and an abutment portion 52 fixedly connected to the support portion 51 for abutting the end face of the main gear 10. The abutment end face of the abutment portion 52 is located lower than the rotation arc of the end face of the clamping portion 432 away from the rotating portion 431, so as to avoid interference between the clamping portion 432 and the end face of the main gear 10.

[0049] Specifically, it also includes a mounting base 7 fixedly connected to the bottom of the mounting seat 1 for accommodating the installation of the main gear 10 and the sub-gear 11, and a positioning and clamping mechanism 8 for pressing the sub-gear 11 and positioning the retaining spring in the sub-gear 11. A rotating mechanism 9 is fixedly provided on the mounting base 7 for overcoming the elastic force of the retaining spring and driving the main gear 10 to rotate so as to realize the rotational docking of the main gear 10 and the sub-gear 11. Before performing the pinning operation, firstly place the sub-gear 11 in the mounting base 7 and use the positioning and clamping assembly to press the sub-gear 11 and fix it, and at the same time locate the position of the retaining spring in the sub-gear 11 to ensure the correct installation position of the retaining spring, then place the main gear 10 coaxially on the sub-gear 11, then the rotating mechanism 9 drives the main gear 10 to rotate a certain angle so that the pin holes between the main gear 10 and the sub-gear 11 coincide, and then the pinning operation is performed to realize the rotational docking of the main and sub-gears.

[0050] A main and auxiliary gear assembly method uses the above-mentioned two-stage pinning mechanism, and its action process is as follows:

[0051] Step 1, place the secondary gear 11 in the mounting base 7 and clamp one end of the circlip on the pin provided on the secondary gear 11, and install the main gear 10 on the secondary gear 11 so that the other end of the circlip is clamped on the pin provided on the main gear 10;

[0052] Step 2: Use the positioning and clamping mechanism 8 to clamp and fix the main gear 10 and the sub-gear 11 in the mounting base 7, and fix the main gear 10 on the rotating mechanism 9;

[0053] Step 3, start the rotating mechanism 9 to drive the main gear 10 to rotate a certain angle so that the central axes of the pin holes provided on the main gear 10 and the auxiliary gear 11 for accommodating the hollow pin 12 are in a straight line;

[0054] Step 4, start the telescopic assembly 2, the telescopic assembly 2 drives the clamping assembly 4 to move downward along the vertical direction, and the hollow pin 12 clamped by the clamping assembly 4 penetrates into the pin hole provided in the main gear 10 until the abutting end surface of the support block 5 abuts against the top end surface of the main gear 10 to complete the first stage of pinning action;

[0055] Step 5, the telescopic assembly 2 continues to move downward along the vertical direction to drive the connecting plate 31 to move downward, the elastic downward pressure column 33 compresses and drives the push rod 32 to push down and connect with the hollow pin 12, the ejection portion 322 of the push rod 32 overcomes the elastic force of the elastic member 433 to open the clamping gripper 43 and push the hollow pin 12 into the pin hole of the secondary gear 11 until the hollow pin 12 is fully inserted, thus completing the second stage of the pin pressing action;

[0056] Step 6: The telescopic assembly 2 retracts, driving the elastic downward pressure column 33 and the push rod 32 to return, completing the assembly process of the main and auxiliary gears.

[0057] The pinning process is divided into two steps to avoid the pinning process being performed because the clamping assembly 4 clamps a portion of the hollow pin 12, causing the hollow pin 12 to be unable to be fully inserted into the pin hole and thus exposed outside the main and auxiliary gears, thereby affecting the assembly effect of the main and auxiliary gears.

[0058] Brief description of the use process: Before performing the pinning operation, first place the secondary gear 11 in the mounting base 7 and use the positioning and clamping assembly to clamp the secondary gear 11 and fix it, and at the same time locate the position of the card in the secondary gear 11 to ensure that the installation position of the retaining spring is correct, then place the main gear 10 coaxially on the secondary gear 11, and then the rotating mechanism 9 drives the main gear 10 to rotate a certain angle so that the pin holes between the main gear 10 and the secondary gear 11 coincide, and then perform the pinning operation.

[0059] Then the first pinning action is carried out, the telescopic assembly 2 is extended to drive the clamping assembly 4 to move along the vertical direction toward the main and auxiliary gears, and the hollow pin 12 clamped by the clamping assembly 4 partially penetrates into the pin hole provided in the main gear 10 until the abutting end face of the support block 5 abuts against the top end face of the main gear 10.

[0060] Next, the second stage of pin pressing action is performed, and the telescopic assembly 2 continues to extend, driving the connecting plate 31 to continue to move downward to compress the elastic lower pressure column 33, so that the push rod 32 pushes the hollow pin 12 to continue to move downward, and the end of the top connection part of the push rod 32 presses the inner end surface of the clamping part to overcome the elastic force of the elastic member 433 so that the clamping gripper 43 rotates along the rotating shaft to open the clamping part 432, thereby pushing the hollow pin 12 into the pin hole of the sub-gear 11 to complete the docking of the main and sub-gears.

[0061] Finally, the telescopic assembly 2 retracts, driving the elastic pressing column 33 and the push rod 32 to return, and then the mounting seat 1 moves to a fixed position to repeat the pressing action to perform the pinning process, which is repeated in a cycle.

[0062] This specific embodiment is only an explanation of the present invention, and it is not a limitation of the present invention. After reading this specification, those skilled in the art can make creative modifications to this embodiment as needed, but as long as it is within the scope of the claims of the present invention, it will be protected by the patent law.

Claims

1. A two-stage pinning mechanism, comprising a vertically mounted mounting seat (1) and a telescopic assembly (2) fixedly connected to the top of the mounting seat (1), wherein the telescopic end of the telescopic assembly (2) is fixedly connected to a mounting plate (21), and the mounting plate (21) is fixedly connected to a plurality of guide posts (22) that cooperate with guide holes at the top of the mounting seat (1); characterized in that: The end of the mounting plate (21) away from the telescopic assembly (2) is provided with a clamping assembly (4) based on a plurality of clamping claws to clamp the hollow pin (12) and an elastic abutting assembly (3) abutting the hollow pin (12) and driving the hollow pin (12) to be inserted into the pin hole of the main gear (10); the clamping assembly (4) is fixedly connected with a plurality of supporting blocks (5) abutting the end surface of the main gear (10) to achieve full insertion of the hollow pin (12) into the pin hole of the main gear (10); the clamping assembly (4) also includes a mounting base (7) for accommodating the mounting of the main gear (10) and the auxiliary gear (11) and a positioning and clamping mechanism (8) for clamping the main gear (10); the mounting base (7) is fixedly provided with a rotating mechanism (9) for overcoming the elastic force of the retaining spring and driving the main gear (10) to rotate so as to achieve rotational docking of the main gear (10) and the auxiliary gear (11); The elastic abutment assembly (3) comprises a connecting plate (31) and a push rod (32) fixedly connected to one end of the connecting plate (31) away from the mounting plate (21) and used for abutting against the hollow pin (12); the connecting plate (31) is evenly and fixedly connected to a plurality of elastic downward pressure columns (33) around the push rod (32); the telescopic end of the elastic downward pressure column (33) is fixedly connected to a first mounting block (34) used for connecting the clamping assembly (4); the first mounting block (34) is provided with a through hole for the push rod (32) to pass through; The ejector rod (32) comprises a connecting portion (321) fixedly connected to the connecting plate (31) and an ejector portion (322) extending from the connecting portion (321) in a direction away from the connecting plate (31), and the end of the ejector portion (322) away from the connecting plate (31) is provided with a protruding ejector block (323) for penetrating into the hollow pin (12); The clamping assembly (4) comprises a second mounting block (41) fixedly connected to the first mounting block (34); the second mounting block (41) is provided with a through slot (42) for the push rod (32) to pass through; a plurality of clamping grippers (43) for clamping the hollow pin (12) are connected in the through slot (42) so as to rotate symmetrically along the central axis of the push rod (32); The clamping gripper (43) comprises a rotating portion (431) rotatably connected to the through slot (42) and a clamping portion (432) fixedly connected to the rotating portion (431) for clamping the hollow pin (12); an elastic member (433) for limiting the loosening of the clamping gripper (43) is fixedly connected between the rotating portion (431) and the support block (5); The support block (5) comprises a support portion (51) and an abutment portion (52) fixedly connected to the support portion (51) and used for abutting against an end surface of the main gear (10); The rotation arc of the end surface of the clamping portion (432) away from the rotating portion (431) is lower than the abutting end surface of the abutting portion (52) abutting against the main gear (10).

2. A two-stage pinning mechanism according to claim 1, characterized in that: A pressure sensing component (6) for detecting the magnitude of downward pressure is fixedly provided between the connecting plate (31) and the mounting plate (21).

3. A method for assembling a main gear and a sub gear, using a two-stage pressing pin mechanism as described in any one of claims 1-2, characterized in that: include: Step 1, placing the secondary gear (11) in the mounting base (7) and clamping one end of the clamping spring on the pin provided on the secondary gear (11), and mounting the main gear (10) on the secondary gear (11) so that the other end of the clamping spring is clamped on the pin provided on the main gear (10); Step 2: Use the positioning and clamping mechanism (8) to clamp and fix the main gear (10) and the sub-gear (11) in the mounting base (7), and fix the main gear (10) on the rotating mechanism (9); Step 3, starting the rotating mechanism (9) to drive the main gear (10) to rotate a certain angle so that the central axes of the pin holes provided on the main gear (10) and the auxiliary gear (11) for accommodating the hollow pin (12) are in a straight line; Step 4, start the telescopic assembly (2), the telescopic assembly (2) drives the clamping assembly (4) to move downward along the vertical direction, and the hollow pin (12) clamped by the clamping assembly (4) penetrates into the pin hole provided in the main gear (10), until the abutting end face of the support block (5) abuts against the top end face of the main gear (10), completing the first stage of the pinning action; Step 5, the telescopic assembly (2) continues to move downward in the vertical direction, driving the connecting plate (31) to move downward, the elastic downward pressure column (33) compresses and drives the push rod (32) to push down the hollow pin (12), and the ejection portion (322) of the push rod (32) overcomes the elastic force of the elastic member (433) to open the clamping gripper (43) and push the hollow pin (12) into the pin hole of the secondary gear (11) until the hollow pin (12) is fully inserted, thus completing the second stage of the pin pressing action; Step 6: The telescopic assembly (2) retracts, driving the elastic downward pressure column (33) and the push rod (32) to return, thus completing the assembly process of the main and auxiliary gears.

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