Clamping device for stator end-to-end welding

Abstract

The utility model relates to a clamping device for parallel head welding of motor stators, which comprises a support fixedly connected with a welding device, the support comprises a top plate provided with at least one through hole, and at least one side of the top plate is provided with a connecting arm extending downwards. A driving mechanism is arranged on the upper portion of the moving arm, a rack structure is arranged on the lower portion of the moving arm, a rotating shaft is arranged on the lower portion of the connecting arm, a gear and a clamping jaw are arranged on the rotating shaft, and the gear is meshed with a rack of the moving arm on the lower portion of the connecting arm. The clamping device is suitable for welding of stator parallel heads in various lap joint modes, can be controlled in a handheld mode, is convenient to operate, adjustable in vertical clamping distance of the stator parallel heads, high in clamping degree and suitable for various welding modes. The structure is simple, use is convenient, and welding quality is good.

Description

Technical Field

[0001] The utility model relates to the field of parallel head welding of motor windings, and particularly relates to a clamping device for parallel head welding of a motor stator. Background Art

[0002] The number of welding joints in the motor winding is large, and the welding quality requirements are high. Especially for large motor windings, the number of welding joints can reach thousands. The welding joints not only need to have good electrical conductivity, but also need to withstand the vibration stress and strong mechanical stress during the normal operation of the motor, and the welding quality requirements are extremely high. If defects occur in the welding joints during the motor winding welding process, the joint resistance will increase, local overheating will occur during operation, which may damage the joint insulation, and even cause the joint to open weld, thus leading to electrical accidents. The motor winding welding joints must have good electrical conductivity, mechanical properties, corrosion resistance, anti-aging and thermal cycling performance to ensure the long-term safe use of the joints.

[0003] In the brazing of the parallel heads of the motor stator, from the perspective of the assembly and positioning of the stator parallel heads, it is crucial to limit the gap of the brazed joints for improving the efficiency and quality of the welding process. When the joint gap is too small, it is difficult to discharge the gap gas, resulting in defects such as incomplete penetration and porosity; when the joint gap is too large, the capillary action weakens, making the filler metal unable to fill the gap, resulting in a decrease in the strength of the brazed joint. A large change in the joint gap will greatly affect the denseness of the brazed joint and the joint strength. Since the stator parallel heads are multi-strand wire rods and the gaps between the end wire rods of each strand are uneven, a clamping device is required during the brazing process of the motor stator parallel heads to control the gaps between the wire rods of each strand.

[0004] CN109963364A discloses an inductor for brazing of radio wave windings, which integrally manufactures a magnetic conductor, an induction coil, and a fixture, and a clamping bracket is installed outside the pressing plate. The pressing plate is connected to the connector through a nut. The coil and the parallel head are clamped by manual screw pressing.

[0005] CN211102037U discloses a fixing device for welding the lead head of a large generator stator wire rod and a connecting plate, which includes an adjustable fixture and a secondary clamping device. The adjustable fixture includes two clamping plates connected by a fixing screw, and a limit nut is arranged outside the fixing screw to limit the two clamping plates between the limit nuts at both ends. The secondary clamping device includes an adjusting screw. During use, after adjusting the distance between the two clamping plates, the limit nuts at both ends of the fixing screw are tightened, and then the handle is rotated to drive the adjusting screw to rotate until the end of the adjusting screw abuts against the inner wall of the first clamping plate, and continue to rotate to make the second clamping plate move towards the first clamping plate to clamp the components between the clamping plates. The parallel head is also clamped by manual screw pressing.

[0006] CN219358203U discloses a heating device for induction welding of motor stator parallel connections, which includes a sensor handpiece, a driving member, and a clamping member connected to the power output end of the driving member; the sensor handpiece includes a support rod and a welding rod, the power output rod of the driving member is connected with a sliding seat, the clamping member includes a clamping block that contacts and can clamp the parallel connection wire and a connecting platform located at the upper end of the clamping block and connected to the sliding seat; when performing welding heating, the power output rod of the driving member drives the sliding seat, the connecting platform, and the clamping block to move up and down to clamp or loosen the parallel connection wire. It uses a pneumatic driving member to drive the clamping member to move up and down to clamp the parallel connection wire on the induction coil. This clamping method makes it only applicable to the stator parallel connections of one lap joint method, and the applicable range is limited.

[0007] In summary, it is necessary to design a clamping device that is convenient to operate, has an adjustable clamping distance, a high clamping degree, and is applicable to the welding of stator parallel connections of various lap joint methods. Summary of the Utility Model

[0008] To solve the above technical problems, the present utility model provides a clamping device for motor stator parallel connection welding, which is applicable to the welding of stator parallel connections of various lap joint methods. This clamping device can be handheld and manipulated, is convenient to operate, has an adjustable upper and lower clamping distance for stator parallel connections, a high clamping degree, and is applicable to various welding methods.

[0009] To achieve the above object, the present utility model proposes the following technical solutions:

[0010] A clamping device for motor stator parallel connection welding includes: a bracket for fixedly connecting with a welding device, the bracket includes a top plate provided with at least one perforation, at least one side of the top plate is provided with a connecting arm extending downward, a moving arm with a driving mechanism arranged on the upper part and a rack structure arranged on the lower part passes through the perforation on the top plate of the bracket, a rotating shaft is arranged at the lower part of the connecting arm, a gear and a claw are arranged on the rotating shaft, and the lower part of the connecting arm is arranged such that the gear meshes with the rack of the moving arm.

[0011] In a preferred embodiment, the driving mechanism of the clamping device for motor stator parallel connection welding includes a cylinder.

[0012] In a preferred embodiment, for the clamping device for motor stator parallel connection welding, connecting arms extending downward are arranged on both sides of the perforation on the top plate of the bracket, the gear is arranged on the rotating shaft passing through the lower parts of the two connecting arms, the gear is located between the two connecting arms, and the claw is located outside the connecting arm.

[0013] In a preferred embodiment, the clamping device for motor stator parallel connection welding is arranged as a double-sided clamping structure including two groups of connecting arms and moving arms.

[0014] In a preferred embodiment, for the clamping device for parallel - head welding of the motor stator, the two moving arms are driven by one cylinder.

[0015] In a preferred embodiment, for the clamping device for parallel - head welding of the motor stator, the two moving arms are respectively driven by two cylinders.

[0016] In a preferred embodiment, for the clamping device for parallel - head welding of the motor stator, the bracket is arranged as a gantry bracket including a top plate and symmetric connecting arms on the left and right sides.

[0017] In a preferred embodiment, for the clamping device for parallel - head welding of the motor stator, the lower part of the connecting arm is arranged to bend inwards towards the center of the gantry bracket.

[0018] In a preferred embodiment, for the clamping device for parallel - head welding of the motor stator, perforations are symmetrically arranged on the left and right sides of the top plate of the gantry bracket. Connecting arms extending downwards are arranged on both the front and rear sides of the perforations. Gears on both the left and right sides are arranged on a rotating shaft passing through the lower parts of the front and rear connecting arms. The gears are located between the two connecting arms, and the claws are located outside the connecting arms.

[0019] In a preferred embodiment, for the clamping device for parallel - head welding of the motor stator, the upper part of the bracket includes a back plate connected to one side of the top plate, and the driving mechanism is fixedly connected to the back plate.

[0020] Compared with the prior art, the present utility model has the following beneficial effects: The clamping device for parallel - head welding of the motor stator of the present utility model realizes the clamping and loosening of the parallel - head of the stator arranged between the top plate of the bracket and the claws by the meshing of the rack at the lower part of the moving arm and the gear on the rotating shaft of the lower part of the connecting arm. The structure is simple and easy to use, and is suitable for the welding of parallel - heads of stators in various lapping methods. The clamping device can be handheld and manipulated, and the operation is convenient. The vertical clamping distance of the parallel - head of the stator is adjustable, the clamping degree is high, and the stability is good, which is suitable for various welding methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic structural diagram of the gantry bracket of the clamping device for parallel - head welding of the stator for the embodiment;

[0022] Figure 2 Schematic diagram of the clamping device for parallel - head welding of the stator for the embodiment.

[0023] In the figure: gear 1, rotating shaft 2, bracket 3, claw 4, driving mechanism 5, moving arm 6, parallel - head 7, heat - insulating and insulating block 8, top plate 300, perforation 301, connecting arm 302, back plate 303. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention.

[0025] The utility model provides a clamping device for the parallel connection welding of a motor stator, which includes: a bracket for fixedly connecting with a welding device, the bracket includes a top plate provided with at least one through hole, at least one side of the top plate is provided with a connecting arm extending downward, a moving arm with a driving mechanism arranged on the upper part and a rack structure arranged on the lower part passes through the through hole on the top plate of the bracket, a rotating shaft is arranged on the lower part of the connecting arm, a gear and a claw are arranged on the rotating shaft, and the lower part of the connecting arm is arranged such that the gear meshes with the rack of the moving arm. Among them, a driving mechanism is arranged on the upper part of the moving arm and a rack structure is arranged on the lower part, and the driving mechanism can drive the moving arm to move up and down, thereby driving the rack to move up and down. Through the meshing of the rack on the lower part of the moving arm and the gear on the rotating shaft of the lower part of the connecting arm, the claw on the rotating shaft is driven to rotate, so as to realize the clamping and loosening of the parallel connection of the stator between the top plate of the bracket and the claw. Any existing driving method can be adopted. In a preferred embodiment, the driving device includes a cylinder, an electric push rod, a servo push rod, and a ball screw nut pair. More preferably, the driving mechanism includes a cylinder.

[0026] In a preferred embodiment, for the clamping device for the parallel connection welding of a motor stator, connecting arms extending downward are arranged on both sides of the through hole on the top plate of the bracket, the gear is arranged on the rotating shaft passing through the lower parts of the two connecting arms, the gear is located between the two connecting arms, and the claw is located outside the connecting arm.

[0027] In a preferred embodiment, the clamping device for the parallel connection welding of a motor stator is arranged to include a double-sided clamping structure with two groups of connecting arms and moving arms. According to the actual situation of the parallel connection of the stator to be welded, the two moving arms can be driven by one cylinder, or the two moving arms can be driven by two cylinders respectively.

[0028] In a preferred embodiment, the bracket is arranged to include a gantry bracket with a top plate and symmetric connecting arms on the left and right sides. Preferably, the lower part of the connecting arm is arranged to bend inward towards the center of the gantry bracket. Preferably, through holes are symmetrically arranged on the left and right sides of the top plate of the gantry bracket, connecting arms extending downward are arranged on both the front and rear sides of the through hole, the gears on the left and right sides are both arranged on the rotating shaft passing through the lower parts of the front and rear two connecting arms, the gear is located between the two connecting arms, and the claw is located outside the connecting arm.

[0029] In a preferred embodiment, the upper part of the bracket of the clamping device for the parallel connection welding of a motor stator includes a back plate connected to one side of the top plate, and the driving mechanism is fixedly connected to the back plate.

[0030] Embodiment

[0031] See the attached Figure 1-2, the clamping device for the motor stator parallel connection welding in this embodiment is used for heating and welding on both sides of the stator parallel connection simultaneously. The clamping device includes a double-sided clamping structure with two sets of connecting arms and moving arms. The bracket is arranged as a gantry bracket including a top plate and symmetric connecting arms on the left and right sides. Perforations are symmetrically arranged on the left and right sides of the top plate of the gantry bracket. Connecting arms extending downward are arranged on both the front and rear sides of the perforations. Gears on both the left and right sides are arranged on a rotating shaft passing through the lower parts of the front and rear two connecting arms. The gears are located between the two connecting arms, and the claws are located outside the connecting arms. The lower part of the connecting arm is arranged to bend inward towards the center of the gantry bracket. The upper part of the bracket includes a back plate connected to one side of the top plate, and the driving mechanism is fixedly connected to the back plate.

[0032] Figure 1 The gantry bracket structure of the clamping device for the stator parallel connection welding in the embodiment is shown. The bracket 3 for fixedly connecting with the welding device includes a top plate 300. Perforations 301 are arranged on the left and right sides of the top plate 300. Connecting arms 302 extending downward are arranged on both the front and rear sides of the perforations 301. The lower part of the connecting arm 302 is arranged to bend inward towards the center of the gantry bracket. Gears 1 on both the left and right sides are arranged on a rotating shaft 2 passing through the lower parts of the front and rear two connecting arms. The gears are located between the two connecting arms, and the claws 4 are located outside the connecting arms. The upper part of the bracket includes a back plate 303 connected to one side of the top plate for connecting the driving mechanism.

[0033] Figure 2 The clamping state when the clamping device in the embodiment is used for the stator parallel connection welding is shown. A moving arm 6 with a driving mechanism 5 arranged on the upper part and a rack structure arranged on the lower part passes through the perforation 301 on the top plate 300 of the bracket 3. The rack on the lower part of the moving arm 6 meshes with the gear 1 on the rotating shaft 2 of the lower part of the connecting arm. During use, the driving mechanism 5 can drive the moving arm 6 to move up and down. The rack on the lower part of the moving arm 6 moves up and down to drive the gear 1 meshing with it to rotate, driving the claws 4 on the rotating shaft 2 to rotate, so as to realize the clamping and loosening of the stator parallel connection 7 arranged between the top plate 300 of the bracket and the claws 4. An insulating block 8 is arranged between the top plate 300 and the stator parallel connection.

[0034] The practice of using the clamping device for the motor stator parallel connection welding of the present utility model for the induction brazing of the stator parallel connection shows that the clamping device of the present utility model is applicable to the welding of stator parallel connections in various lapping modes. The clamping device can be handheld and manipulated, and the operation is convenient. The clamping distance between the upper and lower parts of the stator parallel connection is adjustable, the clamping degree is high, the stability is good, it is applicable to various welding methods, and the welding quality is good.

Claims

1. A clamping device for stator head welding, characterized in that include: A bracket used for fixed connection with a welding device, the bracket includes a top plate with at least one perforation, a connecting arm extending downward is provided on at least one side of the top plate, a moving arm with a driving mechanism at the upper part and a rack structure at the lower part passes through the perforation on the top plate of the bracket, a rotating shaft is provided at the lower part of the connecting arm, a gear and a claw are provided on the rotating shaft, and the lower part of the connecting arm is configured to enable the gear to mesh with the rack of the moving arm.

2. The stator head welding clamping device according to claim 1 is characterized in that The driving mechanism includes a cylinder.

3. The stator head welding clamping device according to claim 1 is characterized in that Connecting arms extending downward are arranged on both sides of the through hole on the top plate of the bracket, the gear is arranged on a rotating shaft passing through the lower parts of the two connecting arms, the gear is located between the two connecting arms, and the claw is located outside the connecting arm.

4. The stator head welding clamping device according to claim 1 is characterized in that The double-sided clamping structure is configured to include two groups of connecting arms and moving arms.

5. The stator head welding clamping device according to claim 4 is characterized in that The two moving arms are driven by one cylinder.

6. The stator head welding clamping device according to claim 4 is characterized in that The two moving arms are driven by two cylinders respectively.

7. The stator head welding clamping device according to claim 4 is characterized in that The bracket is configured as a door-type bracket including a top plate and symmetrical connecting arms on left and right sides.

8. The stator head welding clamping device according to claim 7 is characterized in that The lower part of the connecting arm is arranged to bend inwardly toward the center of the door-shaped bracket.

9. The stator head welding clamping device according to claim 7, characterized in that The top plate of the door-shaped bracket is symmetrically provided with perforations on the left and right sides, and downwardly extending connecting arms are provided on the front and rear sides of the perforations. The gears on the left and right sides are provided on the rotating shaft passing through the lower part of the front and rear connecting arms. The gears are located between the two connecting arms, and the claws are located on the outside of the connecting arms.

10. The stator head welding clamping device according to any one of claims 4 to 9, characterized in that The upper part of the door-shaped bracket comprises a back plate connected to one side of the top plate, and the driving mechanism is fixedly connected to the back plate.

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