Servo press equipment for stator and rotor of permanent magnet synchronous motor

Abstract

The present invention relates to the field of servo press-fitting equipment, and in particular to stator-rotor servo press-fitting equipment for permanent magnet synchronous motors. It includes a bottom plate, a top plate above the bottom plate, a support guide assembly arranged between the bottom plate and the top plate, and a pressure head installation component, a rear end cover installation component for installing a rotor assembly, and a front end cover positioning tooling for fixing a stator assembly arranged in sequence from top to bottom in the installation space between the bottom plate and the top plate; the support guide assembly includes two first columns arranged oppositely in the installation space and two second columns arranged oppositely in the installation space at the rear end of the first column. Through its own structural characteristics and in combination with the servo electric cylinder, it is unnecessary to heat the stator assembly, which can reduce the production cycle, ensure product consistency, and improve product quality.

Description

Technical Field

[0001] The invention relates to the field of servo press-fitting equipment, in particular to stator and rotor servo press-fitting equipment for permanent magnet synchronous motors. Background Art

[0002] At present, the stator assembly and rotor of the servo motor are assembled using a servo press. When the rotor enters the stator, the tooling and equipment ensure concentricity. The traditional hole stator and rotor assembly method uses an oven to heat the stator assembly, and is manually aligned and pressed. The risk of this installation method is that it is impossible to effectively ensure that the rotor bearing and the stator front cover are concentric when the rotor enters the stator, resulting in the motor shaft not turning smoothly and the risk of abnormal noise. Summary of the invention

[0003] The purpose of the present invention is to provide a stator and rotor servo press-fitting device for a permanent magnet synchronous motor, which can reduce the production cycle, ensure product consistency and improve product quality.

[0004] The technical solution of the present invention is as follows:

[0005] The stator and rotor servo press-fitting equipment for permanent magnet synchronous motors is characterized in that it includes a bottom plate, a top plate above the bottom plate, a support and guide assembly arranged between the bottom plate and the top plate, and a press head mounting component, a rear end cover mounting component for mounting a rotor assembly, and a front end cover positioning tooling for fixing a stator assembly, which are arranged in sequence from top to bottom in the installation space between the bottom plate and the top plate.

[0006] The support and guide assembly comprises two first columns arranged opposite to each other in the installation space and two second columns arranged opposite to each other in the installation space at the rear end of the first columns.

[0007] The press head installation component includes a press column plate and a press cylinder that drives the press column plate to reciprocate up and down. The guide holes at both ends of the press column plate are respectively sleeved on the corresponding second columns, and a positioning press head is installed on the protruding part in the center of the press column plate.

[0008] The positioning pressure head comprises a mounting block mounted in cooperation with the protruding portion, a guide column arranged below the mounting block and an ejector pin arranged at the bottom end of the guide column; an outer spring is arranged on the outer sleeve of the guide column above the ejector pin.

[0009] The rear end cover mounting component includes a silo column plate, and the two guide holes at the front end of the silo column plate are respectively sleeved on the corresponding first column, and the two guide holes at the rear end are respectively sleeved on the corresponding second column; an opening is provided in the center of the silo column plate, and the first clamping tool and the second clamping tool are respectively installed on the silo column plate at both ends of the opening, and the first and second clamping tools are arranged opposite to each other; the first and second clamping tools both include guide rails arranged on the silo column plate one after the other, a positioning block arranged between the two guide rails, and a driver driving the positioning block to reciprocate; the top surface of the working end of the positioning block is provided with an installation groove, and the rear and front end cover positioning tool is installed on the installation groove.

[0010] The raised portion at the center of the rear side of the silo column plate is connected to the driving rod of the silo electric cylinder installed on the top plate.

[0011] The silo column plates below the positioning block are all provided with slots, and the driving end of the driver is connected to the non-working end of the positioning block through the connecting block in the slot.

[0012] The rear and front end cover positioning tooling comprises an arc-shaped mounting portion mounted in cooperation with the mounting groove and a positioning groove arranged on the arc-shaped mounting portion for the rear end cover to be placed; the arc-shaped mounting portion in the positioning groove is also provided with an arc-shaped slot.

[0013] A limit block is arranged between the two guide rails, and a limit cross bar is installed at the protrusion in the center of the limit block; and a vertical plate used in conjunction with the limit cross bar is arranged at the end of the connection block.

[0014] The front end cover positioning tooling includes a mounting block installed on the base plate and a positioning seat arranged on the mounting block; an inner hole is provided in the center of the positioning seat to cooperate with the end cover flange, and an inner boss is provided in the mounting hole at the center of the inner hole to cooperate with the inner ring of the end cover bearing.

[0015] Two clamping jaw assemblies are arranged opposite to each other on the bottom plates on both sides of the front end cover positioning tooling; the clamping jaw assemblies each include a slide rail, a moving clamping jaw installed in the slide rail, and a second cylinder driving the moving clamping jaw to reciprocate.

[0016] A second ejector pin which can reciprocate up and down is arranged in the center of the inner boss, and the second ejector pin is connected with an ejector electric cylinder driving rod which is installed on the bottom surface of the bottom plate.

[0017] Two pin holes are arranged opposite to each other on the top surface of the positioning seat outside the inner hole.

[0018] The press-fitting method of the stator-rotor servo press-fitting equipment for the permanent magnet synchronous motor is characterized in that it comprises the following steps: Step 1: placing the stator assembly into the front end cover positioning tooling, and placing the rotor assembly into the rear front end cover positioning tooling of the silo column plate;

[0019] Step 2: Press the start button, and the moving jaws of the jaw assembly clamp the front end cover of the stator assembly;

[0020] Step 3: The silo column plate moves downward, and the press-fit column plate moves downward;

[0021] Step 4: Use the positioning pressure head to press the rear end cover and the center hole of the shaft on the rotor assembly;

[0022] Step 5: The second ejector pin in the ejector electric cylinder rises upward to support the center hole of the rotor assembly shaft;

[0023] Step 6: Open the first and second clamping tools on the silo column plate;

[0024] Step 7: The press-fit column plate continues to move downward until the rear end cover surface of the rotor is fitted with the upper end surface of the stator assembly, and then the second ejector in the ejector electric cylinder retracts downward;

[0025] Step 8: Move the press column plate and the silo column plate upward until they are reset.

[0026] The beneficial effects of the present invention are as follows: the present invention, through its own structural characteristics and in combination with a servo press, eliminates the need to heat the stator assembly, thereby reducing the production cycle, ensuring product consistency, and improving product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The foregoing and other objects, features and advantages of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings.

[0028] in: Figure 1 It is a schematic diagram of the structure of the present invention;

[0029] Figure 2 This is a schematic diagram of the structure of the press-fit column plate of the present invention;

[0030] Figure 3 It is a schematic diagram of the cross-sectional structure of the present invention;

[0031] Figure 4 This is a schematic diagram of the structure of the rear end cover installation component of the present invention;

[0032] Figure 5 This is a schematic diagram of the positioning groove structure of the present invention;

[0033] In the accompanying drawings, 1 is a bottom plate, 2 is a top plate, 4 is a pressure head mounting component, 5 is a rear end cover mounting component, and 6 is a front end cover positioning tooling;

[0034] 3.1 is the first column, 3.2 is the second column, and 3.3 is the third column;

[0035] 4.1 is the press-fit column plate, 4.2 is the protrusion, 4.3 is the positioning pressure head, 4.4 is the mounting block, 4.5 is the guide column, 4.6 is the ejector pin, 4.7 is the outer spring, and 4.8 is the press-fit electric cylinder;

[0036] 5.1 is a silo column plate, 5.2 is an opening, 5.3 is a first clamping fixture, 5.4 is a second clamping fixture, 5.5 is a guide rail, 5.6 is a positioning block, 5.8 is a mounting groove, 5.10 is a raised portion, 5.11 is a silo electric cylinder, 5.12 is a slot, 5.13 is a connecting block, 5.14 is an arc-shaped mounting portion, 5.15 is a positioning slot, 5.16 is an arc-shaped slot, 5.17 is a limit block, 5.18 is a limit cross bar, and 5.19 is a vertical plate;

[0037] 6.1 is a mounting block, 6.2 is a positioning seat, 6.3 is an inner hole, 6.4 is an inner boss, 6.6 is a slide rail, 6.7 is a moving clamp, 6.8 is a second cylinder, and 6.9 is an ejector electric cylinder. DETAILED DESCRIPTION

[0038] See also Figure 1-5 As shown, the stator and rotor servo press-fitting equipment for permanent magnet synchronous motors is characterized in that it includes a bottom plate 1, a top plate 2 above the bottom plate, a support guide assembly arranged between the bottom plate and the top plate, and a pressure head installation component 4, a rear end cover installation component 5 for installing the rotor assembly, and a front end cover positioning tool 6 for fixing the stator assembly are arranged in the installation space between the bottom plate and the top plate from top to bottom. The opening of the bottom plate of the equipment ensures that the column and the base tool mounting hole are in the same radial direction. The front end cover positioning tool presses the column plate, the mounting hole and the mounting hole in the bottom plate of the equipment to ensure the same axial direction. Secondly, because it is fixed on the column, the radial uniformity is ensured, thereby ensuring the overall concentricity of the mounting holes.

[0039] The support guide assembly includes two first columns 3.1 arranged opposite to each other in the installation space and two second columns 3.2 arranged opposite to each other in the installation space at the rear end of the first columns. Preferably, two third columns 3.3 can also be arranged opposite to each other in the installation space at the rear end of the two second columns, and the first columns, the second columns and the third columns correspond to each other one by one; the six columns serve as support points, and the four columns in the first two rows serve as working columns to provide a sliding path for the silo electric cylinder and the press-fit electric cylinder.

[0040] The pressure head installation component includes a press-fit column plate 4.1 and a press-fit electric cylinder 4.8 that drives the press-fit column plate to reciprocate up and down. The guide holes at both ends of the press-fit column plate are respectively sleeved on the corresponding second columns, and a positioning pressure head is installed on the protrusion in the center of the press-fit column plate. The protrusion 4.2 corresponds to the midpoint position of the line connecting the two guide holes, and the protrusion structure preferably adopts an arc structure for greater stability. When the press-fit column plate works downward, the end face of the pressure head assembly fits with the rear end cover of the rotor assembly.

[0041] The positioning pressure head 4.3 includes a mounting block 4.4 mounted in cooperation with the protrusion, a guide column 4.5 arranged below the mounting block, and an ejector pin 4.6 arranged at the bottom of the guide column; an outer spring 4.7 is arranged on the outer sleeve of the guide column above the ejector pin. The guide column and the ejector pin are made of Cr12, and the hardness can reach HRC58-62 after heat treatment to avoid wear and deformation caused by long-term use; the ejector pin acts on the central hole of the rotating shaft of the rotor assembly, and the servo press can accurately control the pressing speed and position. The outer spring has a certain amount of compression and has a buffering effect.

[0042] The rear end cover mounting component includes a silo column plate 5.1, and the two guide holes at the front end of the silo column plate are respectively sleeved on the corresponding first column, and the two guide holes at the rear end are respectively sleeved on the corresponding second column; the silo column plate is provided with an opening 5.2 in the center, and the silo column plates at both ends of the opening are respectively installed with a first clamping fixture 5.3 and a second clamping fixture 5.4, and the first and second clamping fixtures are arranged oppositely; the first and second clamping fixtures both include a guide rail 5.5 arranged on the silo column plate one in front and one in the back, a positioning block 5.6 arranged between the two guide rails, and a driver driving the positioning block to reciprocate (here the driver can be a cylinder); the top surface of the working end of the positioning block is provided with a mounting groove 5.8, and the rear and front end cover positioning fixtures are installed on the mounting grooves. Start the control button, the PLC controls the first and second clamping fixture drivers to take in air, and the clamping fixtures pop open to both sides. After the process is completed, the cylinder collects air, and the first and second clamping fixtures shrink to the middle.

[0043] The raised portion 5.10 at the center of the rear side of the silo column plate is connected to the driving rod of the silo electric cylinder 5.11 installed on the top plate 2. The silo electric cylinder drives the silo column plate to reciprocate up and down.

[0044] The silo column plate below the positioning block is provided with a slot 5.12, and the driving end of the driver is connected to the non-working end of the positioning block through a connecting block 5.13 in the slot.

[0045] The rear and front cover positioning tooling includes an arc-shaped mounting portion 5.14 mounted in cooperation with the mounting groove and a positioning groove 5.15 provided on the arc-shaped mounting portion for placing the rear cover; the arc-shaped mounting portion in the positioning groove is also provided with an arc-shaped slot 5.16. When the rotor assembly is placed, the four sides of the rear cover fit with the rear and front cover positioning tooling to ensure that the rear cover is aligned with the outer edge of the bottom stator assembly housing; ensure that the rotor assembly is concentric with the stator assembly; two positioning blocks are fixed on the silo column plate to ensure parallelism without misalignment; the positioning blocks can be opened and closed, and are in a closed state during loading. When the press-fit column plate moves downward to press the rear cover, the ejector electric cylinder is lifted up, and the two positioning blocks are in an open state, so that the press-fit column plate can move downward to press the press-fit column plate.

[0046] A limit block 5.17 is arranged between the two guide rails, and a limit cross bar 5.18 is installed at the protrusion in the center of the limit block; a vertical plate 5.19 is arranged at the end of the connection block to cooperate with the limit cross bar. Through the cooperation between the limit cross bar and the vertical plate, the positioning block connected to the connection block is limited in the direction of the rotor assembly, ensuring that the rotor assembly cooperates with the positioning groove on the positioning block to limit.

[0047] The front end cover positioning tooling includes a mounting block 6.1 mounted on the base plate and a positioning seat 6.2 arranged on the mounting block; an inner hole 6.3 is arranged in the center of the positioning seat to cooperate with the stator end cover flange, and an inner boss 6.4 is arranged in the mounting hole at the center of the inner hole to cooperate with the inner ring of the stator end cover bearing.

[0048] Two clamping jaw assemblies are arranged opposite to each other on the bottom plates on both sides of the front end cover positioning tooling; the clamping jaw assemblies each include a slide rail 6.6, a moving clamping jaw 6.7 installed in the slide rail, and a second cylinder 6.8 that drives the moving clamping jaw to reciprocate. The outer diameter of the end cover flange matches the stopper of the inner hole of the tooling to ensure that the end cover bearing chamber is concentric with the front bearing when assembled; when the press-fit column plate moves downward, the inner boss of the front end cover positioning tooling abuts against the inner ring of the bearing to ensure that the front bearing and the rotating shaft positioning step cooperate and limit. The PLC controls the cylinder air intake of the clamping jaw assembly, and the moving clamping jaws on both sides extend toward the middle; after the process is completed, the second cylinder collects air, and the moving clamping jaws on both sides retract backward.

[0049] A second ejector that can reciprocate up and down is provided in the center of the inner boss, and the second ejector is connected to the driving rod of the ejector electric cylinder 6.9 installed on the bottom surface of the bottom plate. The ejector electric cylinder drives the second ejector to reciprocate up and down in the inner boss, and the second ejector and the ejector realize the use of double ejectors, which effectively ensures that the rotor bearing and the stator front end cover are concentric when the rotor enters the stator.

[0050] Two pin holes are arranged opposite to each other on the top surface of the positioning seat outside the inner hole. The arranged pin holes cooperate with the start control button and the pin column, and the pin column cooperates with the front end cover mounting hole for positioning to ensure the radial fixation of the end cover.

[0051] The press-fitting method of the stator-rotor servo press-fitting equipment for the permanent magnet synchronous motor is characterized in that it comprises the following steps: Step 1: placing the stator assembly into the front end cover positioning tooling, and placing the rotor assembly into the rear front end cover positioning tooling of the silo column plate;

[0052] Step 2: Press the start button, and the moving jaws of the jaw assembly clamp the front end cover of the stator assembly;

[0053] Step 3: The silo column plate moves downward, and the press-fit column plate moves downward;

[0054] Step 4: Use the positioning pressure head to press the rear end cover and the center hole of the shaft on the rotor assembly;

[0055] Step 5: The second ejector pin in the ejector electric cylinder rises upward to support the center hole of the rotor assembly shaft;

[0056] Step 6: Open the first and second clamping tools on the silo column plate;

[0057] Step 7: The press-fit column plate continues to move downward until the rear end cover surface of the rotor is fitted with the upper end surface of the stator assembly, and then the second ejector in the ejector electric cylinder retracts downward;

[0058] Step 8: Move the press column plate and the silo column plate upward until they are reset.

[0059] Here's how it works:

[0060] The stator assembly is placed in the front cover positioning fixture, and the rotor assembly is placed in the rear cover installation component. At this time, the stator bearing chamber is initially concentric with the rotor bearing. Press the start button with both hands, move the clamping claws to clamp the positioning seat, and fix it. The silo column plate first moves downward for a certain distance, and the press-fit column plate moves downward until the end face of the positioning pressure head fits with the rear end cover of the rotor with a certain pre-tightening force, and the ejector in the positioning pressure head fixes the center hole of the rotating shaft. At this time, the second ejector connected to the ejector electric cylinder is upward and supports the center hole at the other end of the rotating shaft to meet the concentricity requirement of the stator bearing chamber and the rotor bearing. The rear end cover installation component is opened, and the press-fit column plate moves downward until the lower end face of the rear end cover of the rotor assembly fits with the upper end face of the housing of the stator assembly; when the model needs to be changed, only the front cover positioning fixture, the rear end cover installation component, and the press-fit column plate nut need to be unscrewed to replace it.

[0061] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. Pressing method of stator and rotor servo press-fitting equipment for permanent magnet synchronous motor: It is characterized by: The method comprises the following steps: Step 1: placing the stator assembly into the front end cover positioning tooling, and placing the rotor assembly into the rear front end cover positioning tooling of the silo column plate; Step 2: Press the start button, and the moving jaws of the jaw assembly clamp the front end cover of the stator assembly; Step 3: The silo column plate moves downward, and the press-fit column plate moves downward; Step 4: Use the positioning pressure head to press the rear end cover and the center hole of the shaft on the rotor assembly; Step 5: The second ejector pin in the ejector electric cylinder rises upward to support the center hole of the rotor assembly shaft; Step 6: Open the first and second clamping tools on the silo column plate; Step 7: The press-fit column plate continues to move downward until the rear end cover surface of the rotor is fitted with the upper end surface of the stator assembly, and then the second ejector in the ejector electric cylinder retracts downward; Step 8: The press-fit column plate and the silo column plate are moved upward until they are reset; The stator-rotor servo press-fitting equipment for permanent magnet synchronous motors includes a bottom plate, a top plate above the bottom plate, a support and guide assembly arranged between the bottom plate and the top plate, and a pressure head installation component, a rear end cover installation component for installing the rotor assembly, and a front end cover positioning tooling for fixing the stator assembly in the installation space between the bottom plate and the top plate from top to bottom; the support and guide assembly includes two first columns arranged oppositely in the installation space and two second columns arranged oppositely in the installation space at the rear end of the first column; the pressure head installation component includes a press-fitting column plate and a press-fitting electric cylinder for driving the press-fitting column plate to reciprocate up and down, the guide holes at both ends of the press-fitting column plate are respectively sleeved on the corresponding second columns, and a positioning pressure head is installed on the protruding portion in the center of the press-fitting column plate; the positioning pressure head includes a first installation block installed in cooperation with the protruding portion, a guide column arranged below the first installation block, and an ejector arranged at the bottom end of the guide column; an outer spring is provided on the outer sleeve of the guide column above the ejector; the rear end cover installation component includes a silo column plate, a silo The two guide holes at the front end of the column plate are respectively sleeved on the corresponding first columns, and the two guide holes at the rear end are respectively sleeved on the corresponding second columns; an opening is provided in the center of the silo column plate, and the first clamping tool and the second clamping tool are respectively installed on the silo column plates at both ends of the opening, and the first and second clamping tools are arranged opposite to each other; the first and second clamping tools both include guide rails arranged on the silo column plate one after the other, a positioning block arranged between the two guide rails, and a driver driving the positioning block to reciprocate; mounting grooves are provided on the top surfaces of the working ends of the positioning blocks, and rear and front end cover positioning tools are installed on the mounting grooves; the front end cover positioning tool includes a second mounting block mounted on the bottom plate, and a positioning seat arranged on the second mounting block; an inner hole is provided in the center of the positioning seat to cooperate with the end cover flange, and an inner boss is provided in the mounting hole at the center of the inner hole to cooperate with the inner ring of the end cover bearing; a second ejector pin which can reciprocate up and down is provided in the center of the inner boss pin, and the second ejector pin is connected to the ejector electric cylinder driving rod installed on the bottom surface of the bottom plate.

2. The press-fitting method of the stator-rotor servo press-fitting equipment for the permanent magnet synchronous motor according to claim 1, characterized in that: The silo column plates below the positioning block are all provided with slots, and the driving end of the driver is connected to the non-working end of the positioning block through the connecting block in the slot.

3. The press-fitting method of the stator-rotor servo press-fitting equipment for the permanent magnet synchronous motor according to claim 1, characterized in that: The rear and front end cover positioning tooling comprises an arc-shaped mounting portion mounted in cooperation with the mounting groove and a positioning groove arranged on the arc-shaped mounting portion for the rear end cover to be placed; the arc-shaped mounting portion in the positioning groove is also provided with an arc-shaped slot.

4. The press-fitting method of the stator-rotor servo press-fitting equipment for the permanent magnet synchronous motor according to claim 1, characterized in that: Two clamping jaw assemblies are arranged opposite to each other on the bottom plates on both sides of the front end cover positioning tooling; the clamping jaw assemblies each include a slide rail, a moving clamping jaw installed in the slide rail, and a second cylinder driving the moving clamping jaw to reciprocate.

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