Synchronous pressing mechanism with grooved cam for pressurization

Abstract

The invention discloses a synchronous pressing mechanism with a grooved cam for pressurization, and relates to the technical field of motor stator manufacturing. Comprising a mounting plate, a groove cam driving disc, a centering body, a guide disc and a cover plate. The centering body is fixed on the mounting plate; the groove cam driving disc is sleeved on the centering body through a bearing assembly; the guide disc is fixed to the installation plate, the cover plate is connected to the guide disc, the cover plate and the guide disc jointly form a plurality of guide channels evenly distributed in the circumferential direction of the guide disc, and the sliding block assemblies are movably installed in the guide channels. The groove cam drives the disc to rotate, and a cam notch of the groove cam is matched with the rollers on the sliding block assemblies to drive the multiple sliding block assemblies to synchronously and radially press and move. The cam notch is provided with a turning section close to the circle center, when the roller moves to the turning section, the contact point normal passes through the disc center, great mechanical gain is generated, and self-locking pressure maintaining is achieved. According to the invention, a single power source drives a plurality of pressure heads to synchronously and accurately move, supercharge at the tail end and automatically maintain pressure, and the device is particularly suitable for high-quality shaping of a generator stator coil.

Description

Technical Field

[0001] This invention belongs to the field of motor stator manufacturing technology, specifically a synchronous pressing device for generator stator coil shaping, and more particularly a synchronous pressing mechanism that utilizes a slotted cam for pressure enhancement. Background Technology

[0002] Currently, the common method for shaping generator stator coils is to apply pressure to the coil by multiple pressure blocks synchronously retracting radially. To prevent the coil from springing back after shaping, a large pressure must be applied and maintained for a certain period of time, and all pressure blocks must move in strict sync. If the timing of the pressure blocks' movements differs too much, it can easily lead to indentations, copper wire deformation, or even damage to the coil. Current synchronous clamping mechanisms employ multi-cylinder hydraulic synchronization systems, which arrange multiple independent hydraulic cylinders around the stator, with a pressure block installed at the front end of the piston rod of each cylinder. Synchronization valves or flow divider / combiner valves are used to ensure that the hydraulic oil flow distributed to each cylinder is equal, thereby achieving synchronous extension and retraction of multiple cylinders. The pressure holding function is achieved through a hydraulically controlled check valve or pressure holding valve in the hydraulic system to prevent pressure drop. However, this method has the following shortcomings:

[0003] Firstly, the cost is high: multiple hydraulic cylinders, complex valve groups, and piping systems result in high costs;

[0004] Secondly, it occupies a large space: the hydraulic station and numerous cylinders require a large installation space;

[0005] Thirdly, the synchronization accuracy is limited: Affected by factors such as oil cleanliness, oil temperature, and load changes, the synchronization accuracy of the diverter valve is usually 1%-3%, making it difficult to achieve absolute synchronization and still posing a risk of damaging the coil.

[0006] Fourth, the motor needs to run continuously to compensate for leakage during pressure holding, resulting in high energy consumption. Summary of the Invention

[0007] The purpose of this invention is to overcome the shortcomings of the prior art and provide a synchronous pressing mechanism with a grooved cam for increasing pressure, which is simple in structure, driven by a single power source, and can achieve multiple force amplification and automatic pressure holding.

[0008] The technical solution adopted in this invention is: a synchronous pressing mechanism with a grooved cam for pressurization, comprising a mounting plate, a grooved cam drive disk, a centering body, a guide disk, and a cover plate; the centering body is fixed to the mounting plate; the grooved cam drive disk is mounted on the centering body via a bearing assembly; the guide disk is located above the grooved cam drive disk and fixed to the mounting plate; the cover plate is connected to the guide disk, and the cover plate and the guide disk together form multiple guide channels evenly distributed circumferentially along the guide disk, each guide channel extending radially along the guide disk; each guide channel is equipped with a slider assembly, the slider assembly moving radially along the guide disk. Installed within the guide channel, each slider assembly is equipped with rollers that mate with the cam slots; the slotted cam drive disk has multiple cam slots evenly spaced along its circumference, each cam slot including a drive section and a turning section. The drive section is a straight line extending radially inclined from the slotted cam drive disk, and the turning section is close to the center of the slotted cam drive disk; the rollers of the slider assembly are adapted to the cam slots, and the rotation of the slotted cam drive disk drives the rollers to move along the cam slots, and the turning section of the cam slot is configured such that when the roller moves to the turning section, the normal of the contact point between the roller and the cam slot passes through the center of the slotted cam drive disk.

[0009] A drive cylinder is fixed on the mounting plate; a rocker arm is provided between the drive cylinder and the slotted cam drive disk. One end of the rocker arm is hinged to the piston rod of the drive cylinder, and the other end is fixedly connected to the slotted cam drive disk. The rocker arm drives the slotted cam drive disk to rotate.

[0010] During operation, the piston rod of the drive cylinder extends, pushing the swing arm to swing and causing the slotted cam drive disc to rotate. Through the cooperation between the cam slot and the rollers on each slider assembly, the rotational motion of the slotted cam drive disc is converted into the synchronous radial linear motion of all slider assemblies, thereby driving the shaping block connected to the end of the slider assembly to press the stator coil. When the roller enters the turning section of the cam slot, the mechanism is in a state of force amplification and pressure holding.

[0011] Furthermore, the slider assembly includes a sliding block, a connecting pin, and a roller. The top of the connecting pin is fixed to the sliding block, and the roller is rotatably mounted on the connecting pin via a bearing. The sliding block is slidably disposed within the guide channel. This split-type structural design transforms sliding friction (between the sliding block and the guide groove) into rolling friction (between the roller and the cam groove), greatly reducing motion resistance and wear, and improving the service life and smoothness of the mechanism.

[0012] Furthermore, the end of the sliding block is provided with a connection port for connecting to the stator shaping block. The design of the connection port allows the shaping block to be replaced modularly, enhancing the versatility of the mechanism.

[0013] Furthermore, the system also includes a limiting roller assembly connected to the mounting plate. The rollers of this assembly contact the side or end face of the slotted cam drive disc, limiting its axial and radial movement. The limiting roller assembly effectively restricts the axial and radial runout of the slotted cam drive disc during rotation, ensuring smooth operation and precise positioning, thereby guaranteeing the accuracy and reliability of the cam drive relationship.

[0014] Furthermore, the guide plate is fixed to the mounting plate by a plurality of posts distributed along its ring. The posts form a robust support space between the guide plate and the mounting plate, providing sufficient installation and operating space for the radial movement of the slider assembly, making the overall structure more compact and reasonable.

[0015] Furthermore, it also includes a concentric ring, which is mounted on and concentric with the centering body. The guide plate is fitted around the outer circumference of the concentric ring, ensuring the concentricity between the guide plate and the centering body. The concentric ring is a key component in ensuring absolute concentricity between the guide plate and the centering body. Concentricity is a prerequisite for ensuring uniform clearance and synchronized movement between the rollers and cam grooves on all slider assemblies.

[0016] Furthermore, the bearing assembly includes a radial bearing and an end face bearing; the radial bearing is disposed between the outer wall of the centering body and the inner wall of the slotted cam drive disk; the end face bearing is disposed between the bottom flange end face of the centering body and the bottom flange end face of the slotted cam drive disk. The radial bearing mainly bears the radial force, ensuring smooth rotation of the slotted cam drive disk; the end face bearing mainly bears the axial force generated during the driving process. The combination of both ensures that the drive disk can rotate stably and with low resistance even under complex stress conditions.

[0017] Furthermore, the guide plate has radial guide grooves, and the slider assembly is disposed within these guide grooves. The guide grooves provide the slider assembly with a precise radial movement trajectory, ensuring the consistency of movement direction of all clamping points.

[0018] The beneficial effects of the present invention are as follows: The synchronous pressing mechanism with grooved cam pressure disclosed in the present invention uses a single power source to drive all sliders simultaneously through a precision-machined grooved cam drive disk, ensuring the absolute synchronous movement of all pressing points and fundamentally avoiding product damage caused by asynchronous actions.

[0019] The ingenious design of the cam groove transition section generates a huge mechanical gain (pressure boost) at the end of the clamping process, which can output a huge clamping force with a small input force, reducing the load and cost of the drive cylinder.

[0020] The pressure boosting section allows the mechanism to maintain pressure at the pressure boosting position using geometric principles, eliminating the need for any external energy source to maintain pressure, making it energy-efficient and safe.

[0021] This machine integrates four major functions—driving, synchronization, pressurization, and pressure holding—into a compact mechanical unit, resulting in a simple structure, high reliability, and convenient maintenance. The modular slider and shaping block design allows for adaptation to different stator models by replacing the appropriate shaping block, offering strong versatility. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0023] Figure 2 This is a top view of the present invention;

[0024] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0025] Figure 4 This is a schematic diagram of the structure of the slotted cam drive disk;

[0026] Figure 5 This is a schematic diagram of the slider assembly.

[0027] Figure 6 This is a structural schematic diagram of the limiting roller assembly;

[0028] Figure 7 Top view of the guide disc;

[0029] Figure 8 This is a schematic diagram of the guide plate.

[0030] In the diagram, 1-mounting plate, 2-drive cylinder, 3-swing arm, 4-cover plate, 5-slider assembly, 51-sliding block, 52-connecting pin, 53-roller, 54-connecting port, 6-guide plate, 61-guide groove, 7-centering body, 8-groove cam drive plate, 81-cam groove, 9-limiting roller assembly, 10-concentric ring, 11-radial bearing, 12-end face bearing, 13-column. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0032] In this invention, the terms "vertical," "horizontal," "top," and "bottom," etc., indicate orientation or positional relationships based on the appendix. Figure 3 The orientation or positional relationship shown is for the purpose of describing the invention only, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention.

[0033] like Figure 1 , Figure 2 and Figure 3As shown, the synchronous clamping mechanism with grooved cam pressurization includes a mounting plate 1, a grooved cam drive disk 8, a centering body 7, a guide disk 6, and a cover plate 4. The mounting plate 1 serves as the basic platform for the entire mechanism, providing a stable mounting reference.

[0034] The slotted cam drive disk 8 is one of the core components of this invention. It is mounted on the centering body 7 via a bearing assembly. The bearing assembly ensures that the slotted cam drive disk 8 rotates freely relative to the centering body 7. The centering body 7 is fixed to the center of the mounting plate 1, providing a central reference for the rotation of the entire system. Figure 4 As shown, the slotted cam drive disk 8 has multiple cam slots 81 uniformly machined along its annular shape. Each cam slot 81 includes a driving section and a turning section. The driving section is a straight line extending radially inclined from the slotted cam drive disk 8, and the turning section is close to the center of the slotted cam drive disk 8. The driving section of the cam slot 81 is mainly used to drive the slider assembly 5 to move radially linearly along the centering body 7, while the turning section is the key to achieving pressure increase and pressure holding.

[0035] The guide disk 6 is located above the slotted cam drive disk 8 and is fixed to the mounting plate 1 by multiple columns 13, which provide rigid support and movement space. Of course, besides the columns 13, the guide disk 6 can also be fixed to the mounting plate 1 using other structures, as long as they meet the installation position and functional requirements. The center of the guide disk 6 needs to be on the same vertical line as the centering body 7, that is, the guide disk 6 and the centering body 7 need to meet the concentricity requirement. In this embodiment, this is achieved by a concentric ring 10. Specifically, the concentric ring 10 is installed on the centering body 7 and is concentric with it. The guide disk 6 is fitted around the outer circumference of the concentric ring 10, ensuring the concentricity of the guide disk 6 and the centering body 7, thus ensuring accurate motion transmission. The cover plate 4 is fixed to the guide disk 6 by screws. The cover plate 4 and the guide disk 6 together form multiple guide channels that are evenly distributed and independent along the circumference of the guide disk 6, and each guide channel extends radially along the guide disk 6.

[0036] Figure 1 and Figure 3 The original document showed 12 guide channels and 12 cam slots 81. This specification uses 12 guide channels as an example for illustration. This number is an optimized design for common generator stator models, which can achieve the best circumferential pressure distribution while ensuring sufficient clamping force. However, this invention is not limited to the number of guide channels and cam slots 81 being 12; other applicable numbers are also possible.

[0037] The 12 slider assemblies 5 are arranged one-to-one within the guide channel. For example... Figure 5As shown, each slider assembly 5 includes a slider 51, a pin 52, and a roller 53. The roller 53 is rotatably mounted on the connecting pin 52 via a bearing, and the roller 53 can rotate freely on the connecting pin 52. The roller 53 is used to embed into the cam groove 81. The roller 53 rolls within the cam groove 81, making the friction between the slotted cam drive disk 8 and the follower a rolling friction, which is efficient and durable. The end of the slider 51 is provided with a connection port 54, which is used to install shaping blocks for different stator models. The shaping blocks are not shown in the figure. The modular design of the slider improves the utilization rate of the equipment.

[0038] The slider assembly 5 has a slider block 51 that is slidably disposed in the guide channel. Its roller 53 is adapted to the cam groove 81. The roller 53 is embedded in the cam groove 81. The turning section of the cam groove 81 is configured such that when the roller 53 moves to the turning section, the normal of the contact point between the roller 53 and the cam groove 81 passes through the center of the groove cam drive disk 8.

[0039] A drive cylinder 2 is fixed on the mounting plate 1. A rocker arm 3 is provided between the drive cylinder 2 and the slotted cam drive disk 8. One end of the rocker arm 3 is hinged to the piston rod of the drive cylinder 2, and the other end is fixedly connected to the slotted cam drive disk 8, converting the linear motion of the drive cylinder 2 into the rotational motion of the slotted cam drive disk 8. In this way, the power of the slotted cam drive disk 8 comes from a single drive cylinder 2, which is simple, low-cost, and easy to control.

[0040] Also includes, for example Figure 6 The limiting roller assembly 9 shown is connected to the mounting plate 1. Its rollers are in close contact with the side of the slotted cam drive disk 8 to limit the axial and radial movement of the slotted cam drive disk 8, eliminate the axial movement of the slotted cam drive disk 8 during rotation, and improve the smoothness and accuracy of operation.

[0041] The bearing assembly includes a radial bearing 11 and an end bearing 12. The radial bearing 11 is disposed between the outer wall of the centering body 7 and the inner wall of the slotted cam drive disk 8. The end bearing 12 is disposed between the bottom flange end face of the centering body 7 and the bottom flange end face of the slotted cam drive disk 8. This bearing assembly ensures that the drive disk rotates flexibly and can withstand complex loads.

[0042] like Figure 7 and Figure 8 As shown, the guide plate 6 has a radial guide groove 61, the slider assembly 5 is disposed in the guide groove, and the cover plate 4 covers the guide plate 6 between two adjacent guide grooves to form a guide channel. The cover plate 4 limits the slider assembly 5 at the top to prevent it from slipping out of the guide groove opening.

[0043] The working process is as follows: When the piston rod of the drive cylinder 2 extends, it drives the rocker arm 3 to rotate counterclockwise, thereby causing the slotted cam drive disk 8 to rotate counterclockwise synchronously. The rotating cam slot 81 pushes the rollers 53 on the 12 slider assemblies 5, forcing all slider assemblies 5 to move synchronously towards the center along the guide groove of the guide disk 6, causing the shaping block to press against the stator coil. When the rollers 53 move to the turning section of the cam slot 81, the maximum pressing force is reached and the mechanism enters a self-locking pressure-holding state. When the piston rod of the drive cylinder 2 retracts, the process is reversed, and the mechanism is released.

[0044] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A synchronous pressing mechanism with a grooved cam for pressure boosting, characterized in that: The system includes a mounting plate (1), a slotted cam drive disk (8), a centering body (7), a guide disk (6), and a cover plate (4); the centering body (7) is fixed to the mounting plate (1); the slotted cam drive disk (8) is mounted on the centering body (7) via a bearing assembly; the guide disk (6) is located above the slotted cam drive disk (8) and fixed to the mounting plate (1); the cover plate (4) is connected to the guide disk (6), and the cover plate (4) and the guide disk (6) together form multiple guide channels evenly distributed circumferentially along the guide disk (6), each guide channel extending radially along the guide disk (6); each guide channel is equipped with a slider assembly (5), the slider assembly (5) is movably installed in the guide channel along the radial direction of the guide disk (6), and each slider assembly (5) 5) A roller (53) is provided on the cam slot (81) to cooperate with the cam slot (81); a plurality of cam slots (81) are evenly opened on the cam drive disk (8) along its annulus. The cam slot (81) includes a drive section and a turning section. The drive section is a straight line extending radially inclined from the cam drive disk (8). The turning section is close to the center of the cam drive disk (8). The roller (53) of the slider assembly (5) is adapted to the cam slot (81). The cam drive disk (8) rotates and drives the roller (53) to move along the cam slot (81). The turning section of the cam slot (81) is configured such that when the roller (53) moves to the turning section, the normal of the contact point between the roller (53) and the cam slot (81) passes through the center of the cam drive disk (8).

2. The synchronous pressing mechanism with grooved cam pressurization according to claim 1, characterized in that, A drive cylinder (2) is fixed on the mounting plate (1); a swing arm (3) is provided between the drive cylinder (2) and the slot cam drive disk (8). One end of the swing arm (3) is hinged to the piston rod of the drive cylinder (2), and the other end is fixedly connected to the slot cam drive disk (8). The slot cam drive disk (8) is driven to rotate by the swing arm (3).

3. The synchronous pressing mechanism with grooved cam pressurization according to claim 1, characterized in that, The slider assembly (5) includes a slider block (51), a connecting pin (52) and a roller (53). The top of the connecting pin (52) is fixed to the slider block (51), and the roller (53) is rotatably sleeved on the connecting pin (52) through a bearing. The slider block (51) is slidably disposed in the guide channel.

4. The synchronous pressing mechanism with grooved cam booster according to claim 3, characterized in that, The end of the sliding block (51) is provided with a connection port (54) for connecting the stator shaping block.

5. The synchronous pressing mechanism with grooved cam booster according to any one of claims 1-4, characterized in that, It also includes a limiting roller assembly (9), which is connected to the mounting plate (1), and its rollers are in contact with the side or end face of the slotted cam drive disk (8) to limit the axial and radial movement of the slotted cam drive disk (8).

6. The synchronous pressing mechanism with grooved cam booster according to any one of claims 1-4, characterized in that, The guide disc (6) is fixed to the mounting plate (1) by a plurality of posts (13) distributed in a ring around it.

7. The synchronous pressing mechanism with grooved cam booster according to any one of claims 1-4, characterized in that, It also includes a concentric ring (10), which is installed on the centering body (7) and is concentric with the centering body (7). The guide disk (6) is fitted around the outer periphery of the concentric ring (10), and the concentricity of the guide disk (6) and the centering body (7) is ensured by the concentric ring (10).

8. The synchronous pressing mechanism with grooved cam booster according to any one of claims 1-4, characterized in that, The bearing assembly includes a radial bearing (11) and an end bearing (12); the radial bearing (11) is disposed between the outer wall of the centering body (7) and the inner wall of the slotted cam drive disk (8); the end bearing (12) is disposed between the bottom flange end face of the centering body (7) and the bottom flange end face of the slotted cam drive disk (8).

9. The synchronous pressing mechanism with grooved cam booster according to any one of claims 1-4, characterized in that, The guide plate (6) has a radial guide groove (61), and the slider assembly (5) is disposed in the guide groove (61).

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