A motor worm knurling device and application method

Abstract

This invention relates to a motor worm gear knurling device and its application method, comprising a mounting plate on which a knurling mechanism and a bracket are mounted; a lifting unit is mounted on the bracket, and a tension detection unit is mounted on the movable end of the lifting unit. The movable end of the tension detection unit is connected to a gripper via an elastic element, and a magnet is mounted on the gripper; the knurling mechanism includes a limiting frame mounted on the mounting plate, and two drive units are mounted on the limiting frame; a positioning arm is higher than the knurling cutter, and a positioning hole is provided on the positioning arm; two movable holes are provided on the inner wall of the positioning hole, and a left clamping rod and a right clamping rod are respectively mounted in the two movable holes; the device also includes a press mounted on the lower surface of the mounting plate. By applying the method of this application, knurling, pressing, and reliability testing can be effectively combined on a single machine, which can greatly improve efficiency, significantly reduce production costs, and save space.

Description

Technical Field

[0001] This invention relates to the field of motor processing technology, and more specifically, to a motor worm gear knurling device and its application method. Background Technology

[0002] When machining a type of motor that requires mounting a worm gear on the motor shaft, the worm gear needs to be fitted onto the motor shaft, then knurled on the motor shaft, and finally press-fitted and its reliability tested. Existing knurling machines typically only have a single knurling function, requiring two separate devices for press-fitting and testing, which also adds a series of auxiliary tooling for positioning and shifting. This reduces production efficiency and requires more energy and installation space. Therefore, there is a need for a motor worm knurling device and application method that integrates worm gear press-fitting and reliability testing. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a motor worm knurling device and a method for applying the motor worm knurling device, in view of the above-mentioned defects of the prior art.

[0004] The technical solution adopted by this invention to solve its technical problem is:

[0005] A knurling device for a motor worm gear is constructed, comprising a mounting plate on which a knurling mechanism and a bracket are mounted; a lifting unit is mounted on the bracket, and a tension detection unit is mounted on the movable end of the lifting unit. The movable end of the tension detection unit is connected via an elastic element to a clamping jaw for holding and fixing the motor, and the clamping jaw is equipped with a magnet for attracting and fixing the worm gear; the knurling mechanism includes a limiting frame mounted on the mounting plate, and a positioning arm is mounted within the limiting frame. The positioning arm divides the internal space of the limiting frame into two processing slots, and each of the two processing slots is equipped with a movable arm, on which a knurling cutter is mounted; the limiting... The positioning frame is provided with two drive units that respectively drive the movable arm to move laterally; the positioning arm is higher than the knurling cutter, and the positioning arm is provided with a positioning hole for the motor shaft to extend into for positioning; the inner wall of the positioning hole is provided with two movable holes, and a left clamping rod and a right clamping rod are respectively provided in the two movable holes; the positioning arm is provided with a clamping driver that drives the left clamping rod and the right clamping rod to perform clamping actions; the device also includes a control host and a sensor assembly for detecting whether the motor shaft has extended into the positioning hole; the device also includes a press mounted on the lower surface of the mounting plate, the press being used to press the motor shaft upward.

[0006] The motor worm gear knurling device of the present invention includes a through hole on the upper surface of the positioning arm and a first slot on the lower surface of the positioning arm. Two inserts are detachably disposed in the first slot. Semi-cylindrical grooves are provided on opposite sides of the two inserts. The two semi-cylindrical grooves combine to form a shaft hole. The through hole and the shaft hole combine to form a positioning hole. The size of the through hole matches the size of the worm gear, and the size of the shaft hole matches the size of the motor shaft.

[0007] In the motor worm knurling device of the present invention, the upper surface of the insert is provided with a second slot, and the inner top surfaces of the second slot and the first slot together form the movable hole.

[0008] The motor worm knurling device of the present invention includes a clamping driver comprising a first electric push rod and a second electric push rod, wherein the first electric push rod and the second electric push rod respectively drive the left clamping rod and the right clamping rod.

[0009] In the motor worm knurling device of the present invention, the insert is provided with a waist groove, a fastening nut is threaded through the waist groove, and the fastening nut is threadedly connected to the positioning arm.

[0010] In the motor worm knurling device of the present invention, the elastic element is a spring; the movable end of the tension detection unit is fixed with a pressure-holding cylinder sleeved outside the spring, and in the initial state, the lower end of the spring is located outside the pressure-holding cylinder and connected to the gripper.

[0011] The motor worm knurling device of the present invention includes a press comprising a holding cylinder and a cylinder mounting bracket, wherein the movable end of the holding cylinder is provided with a holding rod, and the cylinder mounting bracket is provided with a guide plate for guiding the holding rod.

[0012] The motor worm knurling device of the present invention includes a gripper comprising a gripping arm for gripping a motor housing, an L-shaped extension arm provided on the gripping arm, and a magnet provided on the extension arm.

[0013] The motor worm knurling device of the present invention includes a support frame comprising a first frame and a second frame, the first frame and the second frame being connected by a fixing plate, and the lifting unit being provided on the fixing plate.

[0014] A method for applying a knurling device for a motor worm gear, as described above, wherein the method includes:

[0015] The motor is loaded onto the gripper with the motor shaft facing downwards. The control unit controls the lifting unit to move downwards, so that the motor shaft enters the positioning hole on the positioning arm for positioning.

[0016] After the sensor assembly detects that the motor shaft has entered the positioning hole and is in place, it sends a signal to the control host. The control host controls the clamping driver to operate according to the signal, so that the left and right clamping rods close together to clamp and fix the worm gear.

[0017] The control host controls the two drive units to move synchronously to perform the knurling operation, and after the knurling operation is completed, controls the press to run upward to squeeze the motor shaft, so that the knurling position of the motor shaft is interference-fitted with the worm gear;

[0018] The control host controls the lifting unit to move upward a set distance to read the tension value of the tension detection unit, and judges and outputs the corresponding product information based on the tension value;

[0019] The control host controls the lifting unit to descend a set distance, controls the clamping driver to release the worm gear, and controls the lifting unit to ascend and reset.

[0020] The beneficial effects of this invention are as follows: The motor is loaded onto the gripper with its shaft facing downwards. The control unit controls the lifting unit to descend, causing the motor shaft to enter the positioning hole on the positioning arm for positioning. After the sensor assembly senses the motor shaft entering the positioning hole, it sends a signal to the control unit. The control unit then controls the clamping driver to operate based on the signal, causing the left and right clamping rods to close and clamp the worm gear. The control unit controls the two drive units to move synchronously to perform the knurling operation. After the knurling operation is completed, the control unit controls the press to run upwards and press the motor shaft, ensuring an interference fit between the knurled position of the motor shaft and the worm gear. The control unit controls the lifting unit to move upwards a set distance to read the tension value from the tension detection unit, and judges and outputs the corresponding product information based on the tension value. The control unit controls the lifting unit to descend a set distance, controls the clamping driver to operate and release the clamp on the worm gear, and the control unit controls the lifting unit to move upwards to reset. Using the method of this application, knurling, pressing, and reliability testing can be effectively combined on a single machine, significantly improving efficiency, reducing production costs, and saving space. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort:

[0022] Figure 1 This is an exploded view of the motor worm knurling device according to a preferred embodiment of the present invention (grippers not shown);

[0023] Figure 2 This is a cross-sectional view of the positioning arm of the motor worm knurling device according to a preferred embodiment of the present invention;

[0024] Figure 3 This is a cross-sectional view of the gripper of the motor worm knurling device according to a preferred embodiment of the present invention;

[0025] Figure 4 This is a flowchart illustrating the application method of the motor worm knurling device according to a preferred embodiment of the present invention. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, a clear and complete description will be provided below in conjunction with the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the protection scope of the present invention.

[0027] The preferred embodiment of the motor worm knurling device of the present invention, such as Figure 1 As shown, see also Figure 2 and Figure 3 The system includes a mounting plate 1, on which a knurling mechanism 2 and a bracket 3 are mounted; a lifting unit 4 is mounted on the bracket 3, and a tension detection unit 5 is mounted on the movable end of the lifting unit 4. The movable end of the tension detection unit 5 is connected to a clamping jaw 51 for clamping and fixing a motor via an elastic element 50. A magnet 52 for attracting and fixing a worm gear is mounted on the clamping jaw 51; the knurling mechanism 2 includes a limiting frame 20 mounted on the mounting plate 1, and a positioning arm 21 is mounted inside the limiting frame. The positioning arm 21 divides the internal space of the limiting frame 20 into two processing slots, and movable arms 22 are mounted in both processing slots. Knurling cutters 23 are mounted on the movable arms 22; the limiting frame 20 is equipped with... There are two drive units 24 that respectively drive the movable arm 22 to move laterally; the positioning arm 21 is higher than the knurling cutter 23, and the positioning arm 21 is provided with a positioning hole 210 for the motor shaft to extend into for positioning; the inner wall of the positioning hole 210 is provided with two movable holes, and the left clamping rod 212 and the right clamping rod 213 are respectively provided in the two movable holes; the positioning arm 21 is provided with a clamping driver that drives the left clamping rod 212 and the right clamping rod 213 to perform clamping actions; the device also includes a control host and a sensor assembly 6 for detecting whether the motor shaft has extended into the positioning hole; the device also includes a press 7 mounted on the lower surface of the mounting plate, the press 7 is used to press the motor shaft upward;

[0028] The motor is loaded onto the gripper 51 with its shaft facing downwards. The worm gear is attracted by a magnet to prevent it from falling. The control unit controls the lifting unit 4 to descend, causing the motor shaft to enter the positioning hole 210 on the positioning arm 21 for positioning. After the sensor assembly 6 senses that the motor shaft has entered the positioning hole 210, it sends a signal to the control unit. The control unit controls the clamping driver to operate according to the signal (with a delay of 2-3 seconds), causing the left clamping rod 212 and the right clamping rod 213 to close and clamp and fix the worm gear. The control unit controls the two drive units 24 to move synchronously to perform the knurling operation, and the knurling operation is completed. The press 7 is then operated to press the motor shaft upwards (the motor needs to have some space to move upwards to ensure smooth pressing), so that the knurled part of the motor shaft is interference-fitted with the worm gear; the control host controls the lifting unit 4 to move upwards a set distance to read the tension value of the tension detection unit 5, and judges and outputs the corresponding product information based on the tension value (if the tension value meets the set threshold, it is a qualified product; otherwise, it is unqualified); the control host controls the lifting unit 4 to move downwards a set distance, controls the clamping driver to operate to release the clamping of the worm gear, and the control host controls the lifting unit 4 to move upwards to reset;

[0029] By applying the methods of this application, knurling, pressing and reliability testing can be carried out on a single machine, which can greatly improve efficiency, significantly reduce production costs and save space.

[0030] It should be noted that, while retaining the power mechanism (existing structure) of the knurling machine, this application adds a positioning arm 21. The positioning arm 21 can effectively shield the knurling processing position to provide protection. At the same time, the positioning arm 21 is structurally designed to also serve as a positioning component and a carrier for holding the worm gear, which is a key feature of the entire solution.

[0031] Preferably, the upper surface of the positioning arm 21 is provided with a through hole 218, and the lower surface of the positioning arm 21 is provided with a first slot 215. Two inserts 216 are detachably disposed in the first slot 215. Semi-cylindrical grooves are provided on the opposite side surfaces of the two inserts 216. The two semi-cylindrical grooves are combined to form a shaft hole 219. The through hole 218 and the shaft hole 219 are combined to form a positioning hole 210. The size of the through hole 218 matches the size of the worm gear 218, and the size of the shaft hole 219 matches the size of the motor shaft. The upper surface of the insert 216 is provided with a second slot, and the inner top surfaces of the second slot and the first slot enclose a movable hole. The clamping driver includes a first electric push rod 2140 and a second electric push rod 2141. The first electric push rod 2140 and the second electric push rod 2141 drive the left clamping rod 212 and the right clamping rod 213 respectively. The structure is reasonable and compact, easy to disassemble and assemble, has good driving reliability, and low cost.

[0032] Preferably, the insert 216 is provided with a waist groove, and a fastening nut is threaded through the waist groove and connected to the positioning arm by a thread; of course, it is understood that in addition to this installation method, other existing installation structures can also be used, and the solutions obtained by simple replacement of such structures also fall within the scope of protection of this application.

[0033] like Figure 3 As shown, the elastic element 50 is a spring; the movable end of the tension detection unit 5 is fixed with a pressure sleeve 53 sleeved outside the spring. In the initial state, the lower end of the spring is located outside the pressure sleeve 53 and connected to the gripper 51; preferably, the gripper 51 includes a gripping arm 510 for gripping the motor housing, and an L-shaped extension arm 511 is provided on the gripping arm 510, and a magnet 52 is provided on the extension arm 511; while gripping, the worm gear is contacted and attracted and fixed by the magnet on the extension arm to prevent it from falling off; this structural design is used to achieve the above three integrated functions:

[0034] 1. When entering the knurling position, the spring is gradually compressed to provide cushioning protection until the holding cylinder 53 contacts and presses against the clamp, ensuring that the motor will not shake and improving the stability of the knurling.

[0035] 2. During pressing, the lifting unit 4 drives the motor to move upward, causing the spring to return to its original deformation. Then, the press 7 pushes the motor shaft upward, which in turn drives the motor to move upward. The spring is compressed to avoid and buffer, ensuring smooth pressing.

[0036] 3. During the test, the lifting unit 4 drives the motor to move upward. The spring is first stretched to provide elastic tension to pull the tension detection unit 5 for testing. Then, it is elastically reset (to facilitate the subsequent release of the clamp on the worm gear) for buffer protection.

[0037] By combining these three states, the smooth progress of processing can be well guaranteed;

[0038] Preferably, the press 7 includes a holding cylinder 70 and a cylinder mounting bracket 71. The movable end of the holding cylinder 70 is provided with a holding rod 72, and the cylinder mounting bracket 71 is provided with a guide plate 710 for guiding the holding rod; the structure is simple and has good reliability.

[0039] Preferably, the support 3 includes a first upright 30 and a second upright 31, which are connected by a fixing plate 32. The fixing plate 32 is provided with a lifting unit 4; the structure is simple and has good reliability.

[0040] A method for applying a knurling device for a motor worm gear, as described above, is provided. Figure 4 As shown, the method includes:

[0041] S01: Load the motor onto the gripper with the motor shaft facing down. The main control unit controls the lifting unit to move down, so that the motor shaft enters the positioning hole on the positioning arm for positioning.

[0042] S02: After the sensor assembly senses that the motor shaft has entered the positioning hole and is in place, it sends a signal to the control host. The control host controls the clamping driver to run according to the signal, so that the left clamping rod and the right clamping rod close together to clamp and fix the worm gear.

[0043] S03: The host controller controls the two drive units to move synchronously to perform the knurling operation, and after the knurling operation is completed, controls the press to run upward to squeeze the motor shaft, so that the knurling position of the motor shaft is interference-fitted with the worm gear;

[0044] S04: The control host controls the lifting unit to move upward a set distance to read the tension value of the tension detection unit, and judges and outputs the corresponding product information based on the tension value;

[0045] S05: The control host controls the lifting unit to descend a set distance, controls the clamping driver to release the worm gear, and controls the lifting unit to ascend and reset.

[0046] By applying the methods of this application, knurling, pressing and reliability testing can be carried out on a single machine, which can greatly improve efficiency, significantly reduce production costs and save space.

[0047] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A knurling device for a motor worm gear, characterized in that, The system includes a mounting plate, on which a knurling mechanism and a bracket are mounted. A lifting unit is mounted on the bracket, and a tension detection unit is mounted on the movable end of the lifting unit. The movable end of the tension detection unit is connected via an elastic element to a clamping jaw for holding and fixing a motor. The clamping jaw is equipped with a magnet for attracting and fixing a worm gear. The knurling mechanism includes a limiting frame mounted on the mounting plate, within which a positioning arm is mounted. The positioning arm divides the internal space of the limiting frame into two processing slots, each containing a movable arm with a knurling cutter. Two knurling cutters are mounted on the limiting frame. The device includes a drive unit that drives the movable arm to move laterally; the positioning arm is higher than the knurling cutter, and the positioning arm is provided with a positioning hole for the motor shaft to extend into for positioning; the inner wall of the positioning hole is provided with two movable holes, and a left clamping rod and a right clamping rod are respectively provided in the two movable holes; the positioning arm is provided with a clamping driver that drives the left clamping rod and the right clamping rod to perform clamping actions; the device also includes a control host and a sensor assembly for detecting whether the motor shaft has extended into the positioning hole; the device also includes a press mounted on the lower surface of the mounting plate, the press being used to press the motor shaft upward.

2. The motor worm knurling device according to claim 1, characterized in that, The upper surface of the positioning arm is provided with a through hole, and the lower surface of the positioning arm is provided with a first slot. Two inserts are detachably installed in the first slot. Each of the two inserts has a semi-cylindrical groove on its opposite side surface. The two semi-cylindrical grooves are combined to form a shaft hole, and the through hole and shaft hole are combined to form a positioning hole. The size of the through hole matches the size of the worm gear, and the size of the shaft hole matches the size of the motor shaft.

3. The motor worm knurling device according to claim 2, characterized in that, The upper surface of the insert is provided with a second slot, and the inner top surfaces of the second slot and the first slot together form the movable hole.

4. The motor worm knurling device according to claim 3, characterized in that, The clamping driver includes a first electric actuator and a second electric actuator, which respectively drive the left clamping rod and the right clamping rod.

5. The motor worm knurling device according to claim 2, characterized in that, The insert has a groove, and a fastening nut is threaded through the groove and connected to the positioning arm.

6. The motor worm knurling device according to claim 1, characterized in that, The elastic element is a spring; the movable end of the tension detection unit is fixed with a pressure-holding cylinder sleeved outside the spring. In the initial state, the lower end of the spring is located outside the pressure-holding cylinder and connected to the gripper.

7. The motor worm knurling device according to claim 1, characterized in that, The press includes a holding cylinder and a cylinder mounting bracket. The movable end of the holding cylinder is provided with a holding rod, and the cylinder mounting bracket is provided with a guide plate for guiding the holding rod.

8. The motor worm knurling device according to claim 1, characterized in that, The gripper includes a gripping arm for gripping the motor housing, and the gripping arm is provided with an L-shaped extension arm, and the extension arm is provided with a magnet.

9. The motor worm knurling device according to claim 1, characterized in that, The support includes a first upright and a second upright, which are connected by a fixing plate, and the lifting unit is provided on the fixing plate.

10. A method for applying a knurling device for a motor worm gear, applicable to the knurling device for a motor worm gear as described in any one of claims 1-9, characterized in that, The method includes: The motor is loaded onto the gripper with the motor shaft facing downwards. The control unit controls the lifting unit to move downwards, so that the motor shaft enters the positioning hole on the positioning arm for positioning. After the sensor assembly detects that the motor shaft has entered the positioning hole and is in place, it sends a signal to the control host. The control host controls the clamping driver to operate according to the signal, so that the left and right clamping rods close together to clamp and fix the worm gear. The control host controls the two drive units to move synchronously to perform the knurling operation, and after the knurling operation is completed, controls the press to run upward to squeeze the motor shaft, so that the knurling position of the motor shaft is interference-fitted with the worm gear; The control host controls the lifting unit to move upward a set distance to read the tension value of the tension detection unit, and judges and outputs the corresponding product information based on the tension value; The control host controls the lifting unit to descend a set distance, controls the clamping driver to release the worm gear, and controls the lifting unit to ascend and reset.

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