New energy automobile motor rotor welding clamp

Abstract

The invention relates to the technical field of motor rotor welding, in particular to a new energy automobile motor rotor welding clamp which comprises a workbench, a fixed frame and a movable frame are installed on the workbench, and an electromagnetic ring and a driving gear are arranged on the fixed frame; the clamping assembly comprises a movable cylinder rotationally arranged on the fixing frame and multiple sets of clamping strips, a movable electrode disc and a fixed electrode disc which are electrically connected with the electromagnetic ring are arranged in the movable cylinder, a resistor strip is arranged on the fixed electrode disc, and a second elastic piece is arranged between the movable electrode disc and the fixed electrode disc; when the movable electrode disc moves towards the fixed electrode disc and the movable electrode disc is in contact with the resistor strip, the fixed ring is electrified, and the fixed electrode disc continuously approaches the fixed electrode disc to reduce the resistance and increase the current; and a magnet ring is arranged on the side, close to the electromagnetic ring, of the pressing ring, and when the electromagnetic ring is powered on, the pressing ring is pushed to extrude the multiple sets of clamping strips to be close to each other to clamp the workpiece. The clamping steps are simple, and the machining efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of motor rotor welding, and in particular to a welding fixture for a motor rotor of a new energy vehicle. Background Art

[0002] The motor consists of a rotor and a stator. The rotor is the rotating part of the motor. During the processing of the motor rotor, multiple sets of laminations need to be pressed and welded. The welding of motor rotor laminations is an important link in the motor manufacturing process. It involves fixing multiple laminations together by welding. When welding motor rotor laminations, the welding quality of the motor rotor laminations directly affects the performance and service life of the motor. If the welding is not firm or has defects, it will cause vibration, noise and excessive temperature rise in the rotor during operation. In severe cases, it may even cause damage to the motor.

[0003] Existing motor rotor fixtures mainly rely on clamping components to clamp the rotor shaft for welding operations. Both ends of the rotor need to be clamped in turn, which is cumbersome to operate, resulting in prolonged installation and disassembly time and reduced processing efficiency. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, the present invention provides a new energy vehicle motor rotor welding fixture, which can effectively solve the problems in the prior art of cumbersome clamping operation, increased installation and disassembly time, and reduced processing efficiency.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: The present invention provides a welding fixture for a motor rotor of a new energy vehicle, comprising: A workbench, on which a fixed frame and a movable frame that can move toward the fixed frame are installed, and the fixed frame is provided with an electromagnetic ring and a driving gear; A clamping assembly, the clamping assembly comprising a movable cylinder rotatably arranged on a fixed frame and a plurality of clamping strips distributed on the movable cylinder in an annular array, wherein a movable electrode disk and a fixed electrode disk electrically connected to an electromagnetic ring are arranged in the movable cylinder, and a resistor strip is arranged on the fixed electrode disk, and a second elastic member is arranged between the movable electrode disk and the fixed electrode disk, and when the movable electrode disk moves toward the fixed electrode disk, when the movable electrode disk contacts the resistor strip, the fixed ring is energized, and as it approaches the fixed electrode disk, the resistance is reduced and the current is increased; And a pressing ring sleeved on the movable cylinder, wherein a magnet ring is arranged on one side of the pressing ring close to the electromagnetic ring, and when the electromagnetic ring is energized, the pressing ring is pushed to squeeze multiple groups of clamping strips to move closer to each other to clamp the workpiece.

[0006] Furthermore, the clamping strip consists of three parts: section a, section b and section c, wherein sections a and c are both arranged horizontally, the two ends of section b are respectively connected to sections a and c, and the end of section b close to section a is lower than the end of section b close to section c.

[0007] Furthermore, the c section on the clamping bar is provided with a movable pressure strip and an extrusion strip that cooperate with each other, and the cross-section of one end of the movable pressure strip extending out of the clamping bar is a right-angled trapezoid, and the cross-section of the extrusion strip is an isosceles triangle. A pressure plate that is in contact with the extrusion strip is movably installed on the c section, and when the pressure plate is squeezed, it cooperates with the extrusion strip to extend the movable pressure strip here.

[0008] Furthermore, the movable pressure strip is provided with a plurality of groups of balls, and the plurality of groups of balls are evenly distributed on a side of the movable pressure strip facing the workpiece.

[0009] Furthermore, the length of the clamping strip extending out of the pressing plate in the initial state is smaller than the length of the clamping strip extending out of the movable pressing strip in the initial state.

[0010] Furthermore, a fixed cylinder is provided on one side of the movable frame close to the fixed frame, and two groups of symmetrically distributed spiral guide grooves are provided on the fixed cylinder, a movable disk is movably installed in the fixed cylinder, and a guide column extending into the spiral guide groove is provided on the movable disk, and an elastic member 1 is provided between the movable disk and the fixed cylinder, and the elastic member 1 is used to always push the movable disk toward the fixed frame.

[0011] Furthermore, the movable cylinder is rotatably connected to the fixed frame through two sets of fixed rings, and a gear ring is provided on the movable cylinder, wherein the gear ring is located between the two sets of fixed rings and is meshed with the driving gear.

[0012] Furthermore, a screw drive assembly for driving the movable frame to move is provided on the workbench.

[0013] Beneficial Effects Compared with the known prior art, the technical solution provided by the present invention has the following beneficial effects: 1. The workpiece is pushed into the clamping assembly through the movable frame. When the workpiece is squeezed onto the movable electrode disk, the movable electrode disk is driven to move toward the fixed electrode disk. When the movable electrode disk contacts the resistor bar, the electromagnetic ring is energized to generate magnetic force, which then cooperates with the magnet ring to push the pressure ring away from the fixed frame. Through the special shape of the clamping bar, multiple groups of clamping bars are brought close to each other and clamp the workpiece. It is only necessary to put the rotor between the multiple groups of clamping bars and start the movable frame to push the rotor toward the fixed frame. The clamping steps are simple. The rotor laminations are clamped by multiple groups of clamping bars, which is not easy to deviate. The stability during clamping is good, which improves the processing efficiency. Second, through the cooperation of the movable pressure strip, the extrusion strip and the pressure plate on the clamping strip, when clamping, the movable pressure strip extends into the winding groove on the rotor, and in the subsequent clamping, the pressure plate is squeezed to cooperate with the extrusion strip to further extrude the movable pressure strip. Since a large amount of heat is generated during welding, when the movable pressure strip is against both sides of the rotor winding groove, when the rotor laminations are welded, welding deformation of the rotor laminations is further prevented; 3. The movable disk cooperates with the spiral guide groove on the fixed cylinder to guide the rotor to rotate before it is fully clamped. When the auxiliary rotor is clamped, the rotor is automatically adjusted so that the movable pressure strip enters the winding groove on the rotor faster and more accurately to complete the clamping of the rotor. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the structure of the fixing frame, the movable cylinder and the clamping strip of the present invention; Figure 3 A partial cross-sectional view of the clamping assembly of the present invention; Figure 4 for Figure 3 The enlarged view of point A in the middle; Figure 5 A partial cross-sectional view of the clamping strip of the present invention; Figure 6 is a side view of the clamping strip of the present invention; Figure 7 It is a front view of the clamping strip of the present invention; Figure 8 It is a partial cross-sectional view of the movable frame of the present invention; Fig. 9 It is a schematic diagram of the connection between the fixed frame, the movable frame and the workbench of the present invention.

[0016] Figure numerals: 1, workbench; 11, fixed frame; 111, electromagnetic ring; 112, pressure ring; 113, magnet ring; 114, driving gear; 12, movable frame; 121, fixed cylinder; 1211, spiral guide groove; 122, movable disk; 123, elastic member one; 13, screw drive assembly; 2, clamping assembly; 21, movable cylinder; 211, fixed ring; 212, gear ring; 213, movable electrode disk; 214, fixed electrode disk; 215, elastic member two; 216, resistor bar; 22, clamping bar; 221, movable pressure bar; 222, extrusion bar; 223, pressure plate. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] The present invention will be further described below in conjunction with the embodiments.

[0019] Example: A welding fixture for the rotor of a new energy vehicle motor, see the attached Figure 1-9 ,include: A workbench 1, wherein a fixed frame 11 and a movable frame 12 that can move toward the fixed frame 11 are installed on the workbench 1, and the fixed frame 11 and the movable frame 12 are respectively located at two ends of the workbench 1, and a screw drive assembly 13 for driving the movable frame 12 to move is provided on the workbench 1, wherein the screw drive assembly 13 is composed of a motor, a screw and a slider, the slider is arranged at the bottom of the movable frame 12, the motor is arranged at one end of the fixed frame 11, the screw is arranged at the output end of the motor, and the slider is threadedly connected with the screw, and the screw is driven to rotate by the rotation of the motor, thereby pulling the slider and the movable frame 12 to move toward the fixed frame 11, and an electromagnetic ring 111 and a driving gear 114 are provided on the fixed frame 11; A clamping assembly 2, the clamping assembly 2 includes a movable cylinder 21 rotatably arranged on a fixed frame 11 and a plurality of groups of clamping strips 22 distributed on the movable cylinder 21 in an annular array, the movable cylinder 21 is rotatably connected to the fixed frame 11 through two groups of fixed rings 211, and a gear ring 212 is provided on the movable cylinder 21, the gear ring 212 is located between the two groups of fixed rings 211 and is meshed and connected with a driving gear 114, the two groups of fixed rings 211 can protect the gear ring 212 to prevent the gear ring 212 from being squeezed with the fixed frame 11, the movable cylinder 21 is provided with a movable electrode disk 213 and a fixed electrode disk 214 electrically connected to the electromagnetic ring 111, the movable electrode disk 213 and the fixed electrode disk 214 are respectively electrically connected to one side electrode end of the electromagnetic ring 111, and a power supply is provided between the fixed ring 211 and one of the movable electrode disks 213 or the fixed electrode disk 214, which is used to energize the electromagnetic ring 111 and generate magnetism when the movable electrode disk 213 and the fixed electrode disk 214 are connected, and the fixed electrode disk A resistor bar 216 is provided on 214, and the movable electrode disk 213 does not contact the resistor bar 216 in the initial state. At this time, the electromagnetic ring 111 is not energized. An elastic member 215 is provided between the movable electrode disk 213 and the fixed electrode disk 214. After the movable electrode disk 213 is squeezed by the workpiece, it moves toward the fixed electrode disk 214. At this time, the movable electrode disk 213 contacts the resistor bar 216 and energizes the electromagnetic ring 111, so that the electromagnetic ring 111 generates magnetism. At the same time, the movable electrode disk 213 and the fixed electrode disk 214 are respectively located at the two ends of the resistor bar 216, the circuit resistance is at the maximum, the current value is the minimum, and the magnetism of the electromagnetic ring 111 is the weakest at this time. Since the size of the resistance is proportional to the length, as the movable electrode disk 213 continues to approach the fixed electrode disk 214, the resistance between the movable electrode disk 213 and the fixed electrode disk 214 continues to decrease, the current in the circuit gradually increases, and then the magnetic force of the electromagnetic ring 111 becomes larger and larger, so that the workpiece is gradually clamped; And a pressure ring 112 is sleeved on the movable cylinder 21. A magnet ring 113 is provided on the side of the pressure ring 112 close to the electromagnetic ring 111. When the electromagnetic ring 111 is energized, the pressure ring 112 is pushed to squeeze the multiple groups of clamping strips 22 closer to each other to clamp the workpiece.

[0020] Specifically, the clamping bar 22 consists of three parts: section a, section b and section c, wherein section a and section c are both arranged horizontally, the two ends of section b are connected to section a and section c respectively, and the end of section b close to section a is lower than the end of section b close to section c. Due to the special shape of the clamping bar 22, the pressure ring 112 cooperates with the magnet ring 113 after the electromagnetic ring 111 is energized and magnetized, and moves in a direction away from the fixed frame 11, thereby gathering multiple groups of clamping bars 22 to clamp the workpiece.

[0021] In the above technical scheme, the workpiece is pushed into the clamping assembly 2 by the movable frame 12. When the workpiece is squeezed onto the movable electrode disk 213, the movable electrode disk 213 is driven to move toward the fixed electrode disk 214. When the movable electrode disk 213 contacts the resistor bar 216, the electromagnetic ring 111 is energized to generate magnetic force, and then cooperates with the magnet ring 113 to push the pressure ring 112 away from the fixed frame 11. Through the special shape of the clamping bars 22, multiple groups of clamping bars 22 are brought close to each other and clamp the workpiece. It is only necessary to put the rotor between the multiple groups of clamping bars 22 and start the movable frame 12 to push the rotor toward the fixed frame 11. The clamping steps are simple. The rotor laminations are clamped by the multiple groups of clamping bars 22, which is not easy to cause deviation and has good stability during clamping.

[0022] Further, the c section on the clamping strip 22 is provided with a movable pressure strip 221 and an extrusion strip 222 that cooperate with each other, and the extrusion strip 222 is provided with two groups and distributed on both sides of the movable pressure strip 221, and the cross section of one end of the movable pressure strip 221 extending out of the clamping strip 22 is a right-angled trapezoid, and the cross section of the extrusion strip 222 is an isosceles triangle. The extrusion strip 222 and the movable pressure strip 221 cooperate with each other. After the extrusion strip 222 is squeezed, the two groups of extrusion strips 222 approach each other and squeeze the movable pressure strip 221 to extend out of the clamping strip 22. Further The clamping strip 22 is extended into the winding groove between the rotor laminations to prevent deformation of the rotor laminations during welding. A pressure plate 223 is movably installed on the c section to be in contact with the extrusion strip 222. When the pressure plate 223 is extruded, it cooperates with the extrusion strip 222 to extend the movable pressure strip 221 again. When the movable pressure strip 221 contacts the rotor first, it will not squeeze the pressure plate 223. Only when the movable pressure strip 221 extends into the winding groove on the rotor lamination, it will squeeze the pressure plate 223 to further extend the movable pressure strip 221 to resist the rotor winding groove.

[0023] Among them, the movable pressure strip 221 is provided with multiple groups of balls, and the multiple groups of balls are equidistantly distributed on the side of the movable pressure strip 221 facing the workpiece. By setting up multiple groups of balls, the friction between the movable pressure strip 221 and the rotor is reduced, which facilitates the rotation of the rotor and allows the movable pressure strip 221 to extend into the winding groove on the rotor.

[0024] In addition, the length of the clamping strip 22 extending out of the pressure plate 223 in the initial state is smaller than the length of the clamping strip 22 extending out of the movable pressure strip 221 in the initial state, ensuring that the pressure plate 223 can be squeezed only when the movable pressure strip 221 extends into the rotor winding slot, thereby further squeezing the movable pressure strip 221 to press against the rotor laminations to prevent the rotor laminations from being deformed due to welding.

[0025] In the above technical solution, the movable pressure strip 221, the extrusion strip 222 and the pressure plate 223 on the clamping strip 22 cooperate with each other. When clamping, the movable pressure strip 221 extends into the winding groove on the rotor, and under subsequent clamping, the pressure plate 223 is squeezed to cooperate with the extrusion strip 222 to further extrude the movable pressure strip 221. Since a large amount of heat is generated during welding, when the movable pressure strip 221 is against both sides of the rotor winding groove, welding deformation of the rotor laminations can be further prevented when the rotor laminations are welded.

[0026] In addition, a fixed cylinder 121 is provided on one side of the movable frame 12 close to the fixed frame 11, and two groups of symmetrically distributed spiral guide grooves 1211 are provided on the fixed cylinder 121, a movable disk 122 is movably installed in the fixed cylinder 121, and a guide column extending into the spiral guide groove 1211 is provided on the movable disk 122. When the movable disk 122 contacts the rotor shaft, it cooperates with the movable electrode disk 213 to press against the rotor. At this time, the movable disk 122 moves and rotates along the spiral guide groove 1211, and the movable disk 122 drives the rotor to rotate until the fixed ring 211 enters the winding groove on the rotor. An elastic member 123 is provided between the movable disk 122 and the fixed cylinder 121. The elastic member 123 is used to always push the movable disk 122 toward the fixed frame 11 to facilitate the resetting of the movable disk 122 when the clamping is canceled, and at the same time, it can assist the movable disk 122 to clamp the rotor.

[0027] In the above technical solution, the movable disk 122 cooperates with the spiral guide groove 1211 on the fixed cylinder 121 to guide the rotor to rotate before it is fully clamped. When the rotor is clamped, the rotor is automatically adjusted so that the movable pressure strip 221 enters the winding groove on the rotor faster and more accurately to complete the clamping of the rotor.

[0028] Working principle: put the rotor to be clamped between multiple groups of clamping bars 22, drive the movable frame 12 to move toward the fixed frame 11 through the screw drive assembly 13, and then the movable frame 12 pushes the workpiece into the clamping assembly 2, and when the workpiece is squeezed to the movable electrode disk 213, it drives the movable electrode disk 213 to move toward the fixed electrode disk 214, and when the movable electrode disk 213 contacts the resistor bar 216, the electromagnetic ring 111 is energized to generate magnetic force, and then cooperates with the magnet ring 113 to push the pressure ring 112 away from the fixed frame 11, and through the special shape of the clamping bar 22, multiple groups of clamping bars 22 are brought close to each other and clamp the workpiece. Since a large amount of heat is generated during welding, the movable pressure bar 221, the extrusion bar 222 and the pressure plate 223 on the clamping bar 22 cooperate. When clamping, the movable pressure bar 221 extends into the winding groove on the rotor, and in subsequent clamping, the pressure plate 223 is squeezed to cooperate with the extrusion bar 2 22, further extrude the movable pressure strip 221, when the movable pressure strip 221 presses against the two sides of the rotor winding groove, when the rotor laminations are welded, the rotor laminations are further prevented from welding deformation. On the other hand, since the movable frame 12 moves to squeeze the rotor, it cannot be guaranteed that the movable pressure strip 221 will be directly inserted into the winding groove on the rotor every time. When the movable pressure strip 221 presses against the rotor and extends into the winding groove, the movable disk 122 cooperates with the spiral guide groove 1211 on the fixed cylinder 121 to guide the rotor to rotate, so that the movable pressure strip 221 enters the winding groove. The ball bearings arranged on the movable pressure strip 221 can reduce the friction between the rotor and the movable pressure strip 221 when the rotor rotates, so as to realize the rotation of the rotor before it is fully clamped, and assist the movable pressure strip 221 on the clamping bar 22 to extend into the winding groove on the rotor, automatically adjust the rotor, so that the movable pressure strip 221 can enter the winding groove on the rotor faster and more accurately.

[0029] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A welding fixture for a motor rotor of a new energy vehicle, characterized in that: include: A workbench (1), wherein a fixed frame (11) and a movable frame (12) movable toward the fixed frame (11) are mounted on the workbench (1), and an electromagnetic ring (111) and a driving gear (114) are provided on the fixed frame (11); A clamping assembly (2), the clamping assembly (2) comprising a movable cylinder (21) rotatably mounted on a fixed frame (11) and a plurality of clamping strips (22) distributed in an annular array on the movable cylinder (21); a movable electrode disk (213) and a fixed electrode disk (214) electrically connected to the electromagnetic ring (111) are arranged in the movable cylinder (21); a power source is arranged between the fixed ring (211) and one of the movable electrode disk (213) or the fixed electrode disk (214); a resistor strip (216) is arranged on the fixed electrode disk (214); a second elastic member (215) is arranged between the movable electrode disk (213) and the fixed electrode disk (214); when the movable electrode disk (213) moves toward the fixed electrode disk (214), the fixed ring (211) is energized when the movable electrode disk (213) contacts the resistor strip (216); and as the movable electrode disk (213) moves toward the fixed electrode disk (214), the resistance is reduced and the current is increased as the movable electrode disk (213) is approached to the fixed electrode disk (214); and a pressing ring (112) sleeved on the movable cylinder (21); a magnet ring (113) is provided on a side of the pressing ring (112) close to the electromagnetic ring (111); when the electromagnetic ring (111) is energized, the pressing ring (112) is pushed to squeeze the multiple groups of clamping strips (22) closer together to clamp the workpiece.

2. A welding fixture for a new energy vehicle motor rotor according to claim 1, characterized in that: The clamping strip (22) is composed of three parts: section a, section b and section c, wherein section a and section c are both arranged horizontally, two ends of section b are respectively connected to section a and section c, and an end of section b close to section a is lower than an end of section b close to section c.

3. A welding fixture for a new energy automobile motor rotor according to claim 2, characterized in that: The c section on the clamping strip (22) is provided with a movable pressure strip (221) and an extrusion strip (222) that cooperate with each other, and the cross section of one end of the movable pressure strip (221) extending out of the clamping strip (22) is a right-angled trapezoid, and the cross section of the extrusion strip (222) is an isosceles triangle. A pressing plate (223) that is in contact with the extrusion strip (222) is movably mounted on the c section, and when the pressing plate (223) is extruded, it cooperates with the extrusion strip (222) to extend the movable pressure strip (221) therefrom.

4. A welding fixture for a new energy automobile motor rotor according to claim 3, characterized in that: The movable pressure strip (221) is provided with a plurality of groups of rolling balls, and the plurality of groups of rolling balls are evenly distributed on a side of the movable pressure strip (221) facing the workpiece.

5. A welding fixture for a new energy automobile motor rotor according to claim 3, characterized in that: The length of the clamping strip (22) that is extended from the pressing plate (223) in the initial state is less than the length of the clamping strip (22) that is extended from the moving pressing strip (221) in the initial state.

6. A welding fixture for a new energy vehicle motor rotor according to claim 1, characterized in that: A fixed cylinder (121) is provided on one side of the movable frame (12) close to the fixed frame (11), and the fixed cylinder (121) is provided with two groups of symmetrically distributed spiral guide grooves (1211); a movable disk (122) is movably installed in the fixed cylinder (121), and the movable disk (122) is provided with a guide column extending into the spiral guide groove (1211); an elastic member (123) is provided between the movable disk (122) and the fixed cylinder (121), and the elastic member (123) is used to always push the movable disk (122) toward the fixed frame (11).

7. A welding fixture for a new energy automobile motor rotor according to claim 1, characterized in that: The movable cylinder (21) is rotatably connected to the fixed frame (11) via two sets of fixed rings (211), and a gear ring (212) is provided on the movable cylinder (21), wherein the gear ring (212) is located between the two sets of fixed rings (211) and is meshingly connected to the driving gear (114).

8. The welding fixture for the rotor of a new energy automobile motor according to claim 1 is characterized in that: The workbench (1) is provided with a screw drive assembly (13) for driving the movable frame (12) to move.

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