Motor worm knurling device and application method

Abstract

The invention relates to a motor worm knurling device and an application method. The motor worm knurling device comprises a mounting plate, and a knurling mechanism and a support are arranged on the mounting plate; a lifting unit is arranged on the support, a tension detection unit is arranged at the movable end of the lifting unit, the movable end of the tension detection unit is connected with a clamping jaw through an elastic piece, and a magnet is arranged on the clamping jaw; the knurling mechanism comprises a limiting frame arranged on the mounting plate, and two driving units are arranged on the limiting frame; the positioning arm is higher than the knurling tool, and a positioning hole is formed in the positioning arm; two movable holes are formed in the inner wall of the positioning hole, a left clamping rod and a right clamping rod are arranged in the two movable holes correspondingly, and the device further comprises a pressing machine installed on the lower surface of the installation plate. And the production cost is greatly reduced, and the space is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of motor processing, and more specifically, to a motor worm knurling device and an application method thereof. Background Art

[0002] When processing a type of motor that requires a worm to be installed on the motor shaft, the worm needs to be mounted on the motor shaft, then the motor shaft is knurled, and then press-fitted and fixed, and the fixation reliability is tested; the existing knurling machines usually only have a single knurling function, and two separate devices need to be set up for press-fitting and testing respectively, and a series of auxiliary tooling such as positioning and shifting will be added accordingly, which reduces production efficiency and also requires more energy and installation space. There is a need for a motor worm knurling device and application method that integrates worm 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 an application method of the motor worm knurling device in view of the above-mentioned defects of the prior art.

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

[0005] A motor worm knurling device is constructed, wherein the knurling device comprises a mounting plate, on which a knurling mechanism and a bracket are arranged; a lifting unit is arranged on the bracket, a tension detection unit is arranged on the movable end of the lifting unit, the movable end of the tension detection unit is connected with a clamping claw for clamping and fixing the motor through an elastic member, and a magnet for adsorbing and fixing the worm is arranged on the clamping claw; the knurling mechanism comprises a limit frame arranged on the mounting plate, a positioning arm is arranged in the limit frame, and the positioning arm divides the internal space of the limit frame into two processing grooves, and movable arms are arranged in both processing grooves, and a knurling cutter is arranged on the movable arm; the limit frame The positioning frame is provided with two driving units which respectively drive the movable arm to move horizontally; the positioning arm is higher than the knurling cutter, and the positioning arm is provided with a positioning hole for the power supply motor shaft to be inserted into for positioning; the inner wall of the positioning hole is provided with two movable holes, and the two movable holes are respectively provided with a left clamping rod and a right clamping rod, and the positioning arm is provided with a clamping driver which drives the left clamping rod and the right clamping rod to perform a clamping action, and the device also includes a control host and a sensor assembly which detects whether the motor shaft is inserted into the positioning hole and is in place; the device also includes a press installed on the lower surface of the mounting plate, and the press is used to squeeze the motor shaft upward.

[0006] The motor worm knurling device described in the present invention is characterized in that a through hole is provided on the upper surface of the positioning arm, and a first slot is provided on the lower surface of the positioning arm, two inserts are detachably provided in the first slot, and semi-cylindrical grooves are provided on the surfaces on opposite sides of the two inserts, the two semi-cylindrical grooves are combined to form an axial hole, and the through hole and the axial hole are combined to form a positioning hole; the size of the through hole matches the size of the worm, and the size of the axial hole matches the size of the motor shaft.

[0007] The motor worm knurling device of the present invention is characterized in that a second slot is provided on the upper surface of the insert, and the second slot and the inner top surface of the first slot enclose each other to form the movable hole.

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

[0009] The motor worm knurling device described in the present invention, wherein the insert is provided with a waist groove, a fastening nut is passed through the waist groove, and the fastening nut is threadedly connected to the positioning arm.

[0010] The motor worm knurling device described in the present invention, wherein the elastic member is a spring; the movable end of the tension detection unit is fixed with a holding cylinder sleeved outside the spring, and in an initial state, the lower end of the spring is located outside the holding cylinder and connected to the clamping claw.

[0011] The motor worm knurling device described in the present invention, wherein the press includes a holding cylinder and a cylinder mounting frame, a holding rod is provided at the movable end of the holding cylinder, and a guide plate for guiding the holding rod is provided on the cylinder mounting frame.

[0012] The motor worm knurling device described in the present invention, wherein the clamping jaw includes a clamping arm for clamping the motor housing, the clamping arm is provided with an L-shaped extension arm, and the extension arm is provided with a magnet.

[0013] The motor worm knurling device described in the present invention, wherein the bracket includes a first upright frame and a second upright frame, the first upright frame and the second upright frame are connected by a fixing plate, and the lifting unit is arranged on the fixing plate.

[0014] An application method of a motor worm knurling device is applied to the motor worm knurling device as described above, wherein the method comprises:

[0015] Load the motor onto the clamping jaws with the motor shaft facing downwards, and control the lifting unit downwards so that the motor shaft enters the positioning hole on the positioning arm for positioning;

[0016] After the sensor component senses that the motor shaft has been inserted into the positioning hole, 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 clamping rod and the right clamping rod are closed to clamp and fix the worm.

[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 operate and squeeze the motor shaft upward, so that the knurling position of the motor shaft is interference-fitted with the worm;

[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 move downward to a set distance, controls the clamping driver to release the clamping of the worm, and controls the lifting unit to move upward to reset.

[0020] The beneficial effects of the present invention are as follows: the motor is loaded onto the clamping claw with the motor shaft facing downward, and the control host controls the lifting unit to move downward so that the motor shaft enters the positioning hole on the positioning arm for positioning; the sensor component senses that the motor shaft is inserted into the positioning hole and is in place, and sends a signal to the control host, and the control host controls the clamping driver to operate according to the signal, so that the left clamping rod and the right clamping rod are closed to clamp and fix the worm; 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 operate to squeeze the motor shaft upward, so that the knurling position of the motor shaft and the worm are interference-fitted; the control host controls the lifting unit to move upward to set a 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 move downward to set a distance, controls the clamping driver to operate to release the clamping of the worm, and controls the lifting unit to reset upward; by applying the method of the present application, knurling, pressing and reliability detection can be well taken into account on one device, which can well improve efficiency, and greatly reduce production costs and save space. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in 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 of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work:

[0022] Figure 1 It is an exploded view of the motor worm knurling device of a preferred embodiment of the present invention (the clamping jaws are not shown);

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

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

[0025] Figure 4 It is a flow chart of the application method of the motor worm knurling device according to the preferred embodiment of the present invention. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the following will be described clearly and completely in combination with the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are partial embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present invention.

[0027] The motor worm knurling device of the preferred embodiment of the present invention is as follows Figure 1 See also Figure 2 and Figure 3 , including a mounting plate 1, on which a knurling mechanism 2 and a bracket 3 are arranged; a lifting unit 4 is arranged on the bracket 3, and a tension detection unit 5 is arranged on the movable end of the lifting unit 4, and the movable end of the tension detection unit 5 is connected to a clamping claw 51 for clamping and fixing the motor through an elastic member 50, and a magnet 52 for adsorbing and fixing the worm is arranged on the clamping claw 51; the knurling mechanism 2 includes a limit frame 20 arranged on the mounting plate 1, and a positioning arm 21 is arranged in the limit frame, and the positioning arm 21 divides the internal space of the limit frame 20 into two processing grooves, and both processing grooves are provided with a movable arm 22, and a knurling cutter 23 is arranged on the movable arm 22; a limit frame 20 is provided There are two driving units 24 that respectively drive the movable arm 22 to move horizontally; 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 be inserted into the positioning; the inner wall of the positioning hole 210 is provided with two movable holes, and the two movable holes are respectively provided with a left clamping rod 212 and a right clamping rod 213, and 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 the clamping action, and the device also includes a control host and a sensor component 6 for detecting whether the motor shaft is inserted into the positioning hole in place; the device also includes a press 7 installed on the lower surface of the mounting plate, and the press 7 is used to squeeze the motor shaft upward;

[0028] The motor is loaded onto the clamping claw 51, with the motor shaft facing downward, and the worm is adsorbed by a magnet to prevent it from falling. The control host controls the lifting unit 4 to move downward, so that the motor shaft enters the positioning hole 210 on the positioning arm 21 for positioning; the sensor component 6 senses that the motor shaft has entered the positioning hole 210 and sends a signal to the control host. The control host controls the clamping driver to run according to the signal (delay of 2-3 seconds), so that the left clamping rod 212 and the right clamping rod 213 close to clamp and fix the worm; the control host controls the two drive units 24 to move synchronously to perform the knurling operation, and after the knurling operation is completed Then, the press machine 7 is controlled to operate and squeeze the motor shaft upward (a space for upward movement is required for the motor to be reserved to ensure that the press fitting can proceed smoothly), so that the knurled position of the motor shaft and the worm are fitted with interference fit; the host is controlled to control the lifting unit 4 to move upward by a set distance to read the tension value of the tension detection unit 5, and the corresponding product information is judged and output according to the tension value (if the tension value meets the set threshold, it is a qualified product, otherwise it is unqualified); the host is controlled to control the lifting unit 4 to move downward by a set distance, control the clamping driver to operate to release the clamping of the worm, and the host is controlled to control the lifting unit 4 to reset upward;

[0029] By applying the method of the present application, knurling, press-fitting and reliability testing can be well taken into account on one device, 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, the present application adds a positioning arm 21, which can well shield the knurling processing position to provide protection. At the same time, the positioning arm 21 is structurally designed to take into account positioning and serve as a carrier for the components that clamp the worm, which is a key feature of the entire solution.

[0031] Preferably, a through hole 218 is provided on the upper surface of the positioning arm 21, and a first slot 215 is provided on the lower surface of the positioning arm 21. Two inserts 216 are detachably provided in the first slot 215. Semi-cylindrical slots are provided on the surfaces of the opposite sides of the two inserts 216. The two semi-cylindrical slots are combined to form an axial hole 219; the through hole 218 and the axial hole 219 are combined to form a positioning hole 210; the size of the through hole 218 matches the size of the worm 218, and the size of the axial hole 219 matches the size of the motor shaft; a second slot is provided on the upper surface of the insert 216, and the second slot and the inner top surface of the first slot are enclosed to form a movable hole; the clamping driver includes a first electric push rod 2140 and a second electric push rod 2141, and 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, with good driving reliability and low cost;

[0032] Preferably, a waist groove is provided on the insert 216, and a fastening nut is passed through the waist groove, and the fastening nut is threadedly connected to the positioning arm; of course, it can be understood that in addition to this installation method, other existing installation structures can also be used, and the solution obtained by simple replacement of this structure also belongs to the protection scope of this application.

[0033] like Figure 3 As shown, the elastic member 50 is a spring; the movable end of the tension detection unit 5 is fixed with a holding cylinder 53 sleeved outside the spring, and in the initial state, the lower end of the spring is located outside the holding cylinder 53 and connected to the clamping jaw 51; preferably, the clamping jaw 51 includes a clamping arm 510 for clamping the motor housing, and the clamping arm 510 is provided with an L-shaped extension arm 511, and the extension arm 511 is provided with a magnet 52; while clamping, the worm is contacted and adsorbed and fixed by the magnet on the extension arm to prevent it from falling; this structural design is used to cooperate to realize the above three integrated functions:

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

[0035] 2. During press-fitting, the lifting unit 4 drives the motor upward, so that the spring recovers its deformation, and then the press 7 squeezes the motor shaft upward to drive the motor upward together. The spring is compressed to achieve avoidance and buffering, ensuring smooth press-fitting;

[0036] 3. During the test, the lifting unit 4 drives the motor upward, the spring is stretched first, providing elastic tension to pull the tension detection unit 5 for testing, and then elastic reset is performed (to facilitate the subsequent loosening of the clamping of the worm) for buffer protection;

[0037] Through the coordination of the three states, the smooth processing can be well guaranteed;

[0038] Preferably, the press 7 comprises a holding cylinder 70 and a cylinder mounting frame 71, a holding rod 72 is provided at the movable end of the holding cylinder 70, and a guide plate 710 for guiding the holding rod is provided on the cylinder mounting frame 71; the structure is simple and the reliability is good.

[0039] Preferably, the bracket 3 includes a first stand 30 and a second stand 31 , the first stand 30 and the second stand 31 are connected via a fixing plate 32 , and a lifting unit 4 is disposed on the fixing plate 32 ; the structure is simple and the reliability is good.

[0040] An application method of a motor worm knurling device is applied to the motor worm knurling device as described above, such as Figure 4 As shown, the method includes:

[0041] S01: Load the motor onto the clamping jaws with the motor shaft facing downward, and control the lifting unit downward so that the motor shaft enters the positioning hole on the positioning arm for positioning;

[0042] S02: After the sensor component senses that the motor shaft has been inserted into the positioning hole, 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 clamping rod and the right clamping rod are closed to clamp and fix the worm;

[0043] S03: 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 operate and squeeze the motor shaft upward, so that the knurling position of the motor shaft is interference-fitted with the worm;

[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 corresponding product information according to the tension value;

[0045] S05: The control host controls the lifting unit to move downward by a set distance, controls the clamping driver to release the clamping of the worm, and controls the lifting unit to move upward and reset;

[0046] By applying the method of the present application, knurling, press-fitting and reliability testing can be well taken into account on one device, 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 changes based on the above description, and all these improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A motor worm knurling device, characterized in that: It comprises a mounting plate, on which a knurling mechanism and a bracket are arranged; a lifting unit is arranged on the bracket, a tension detection unit is arranged on the movable end of the lifting unit, the movable end of the tension detection unit is connected with a clamping claw for clamping and fixing the motor through an elastic member, and a magnet for adsorbing and fixing the worm is arranged on the clamping claw; the knurling mechanism comprises a limit frame arranged on the mounting plate, a positioning arm is arranged in the limit frame, and the positioning arm divides the internal space of the limit frame into two processing grooves, and movable arms are arranged in the two processing grooves, and a knurling cutter is arranged on the movable arm; two limit frames are arranged The driving units respectively correspond to the lateral movement of the movable arms; the positioning arm is higher than the knurling cutter, and the positioning arm is provided with a positioning hole for the power supply motor shaft to be inserted into the positioning; the inner wall of the positioning hole is provided with two movable holes, and the two movable holes are respectively provided with a left clamping rod and a right clamping rod, and the positioning arm is provided with a clamping driver for driving the left clamping rod and the right clamping rod to perform a clamping action, and the device also includes a control host and a sensor component for detecting whether the motor shaft is inserted into the positioning hole and is in place; the device also includes a press installed on the lower surface of the mounting plate, and the press is used to squeeze the motor shaft upward.

2. The motor worm knurling device according to claim 1, characterized in that: A through hole is provided on the upper surface of the positioning arm, and a first slot is provided on the lower surface of the positioning arm. Two inserts are detachably provided in the first slot, and semi-cylindrical grooves are provided on the surfaces on opposite sides of the two inserts. The two semi-cylindrical grooves are combined to form an axial hole, and the through hole and the axial hole are combined to form a positioning hole; the size of the through hole matches the size of the worm, and the size of the axial 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 second slot and the inner top surface of the first slot are combined to form the movable hole.

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

5. The motor worm knurling device according to claim 2, characterized in that: The insert is provided with a waist groove, the waist groove is penetrated with a fastening nut, and the fastening nut is threadedly connected with the positioning arm.

6. The motor worm knurling device according to claim 1, characterized in that: The elastic member is a spring; a holding cylinder sleeved outside the spring is fixed to the movable end of the tension detection unit, and in an initial state, the lower end of the spring is located outside the holding cylinder and connected to the clamping claw.

7. The motor worm knurling device according to claim 1, characterized in that: The press comprises a holding cylinder and a cylinder mounting frame, a holding rod is arranged at the movable end of the holding cylinder, and a guide plate for guiding the holding rod is arranged on the cylinder mounting frame.

8. The motor worm knurling device according to claim 1, characterized in that: The clamping claw comprises a clamping arm for clamping the motor housing, an L-shaped extension arm is arranged on the clamping arm, and a magnet is arranged on the extension arm.

9. The motor worm knurling device according to claim 1, characterized in that: The bracket includes a first stand and a second stand, the first stand and the second stand are connected via a fixing plate, and the lifting unit is arranged on the fixing plate.

10. An application method of a motor worm knurling device, applied to the motor worm knurling device as claimed in any one of claims 1 to 9, characterized in that: The method comprises: Load the motor onto the clamping jaws with the motor shaft facing downwards, and control the lifting unit downwards so that the motor shaft enters the positioning hole on the positioning arm for positioning; After the sensor component senses that the motor shaft has been inserted into the positioning hole, 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 clamping rod and the right clamping rod are closed to clamp and fix the worm. 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 operate and squeeze the motor shaft upward, so that the knurling position of the motor shaft is interference-fitted with the worm; 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 move downward to a set distance, controls the clamping driver to release the clamping of the worm, and controls the lifting unit to move upward to reset.

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