Electric drive rotor assembling tool and using method thereof

Abstract

The invention discloses an electrically-driven rotor assembling tool and a using method thereof, and belongs to the technical field of rotor assembling tools, the electrically-driven rotor assembling tool comprises a driving motor, a servo press, an X-Y direction adjusting mechanism and an angular direction adjusting mechanism, the driving motor can drive the servo press and the tool to integrally move up and down, a rotor clamping air cylinder carries a rotor assembly to descend to a designated position, and the X-Y direction adjusting mechanism is used for adjusting the X-Y direction adjusting mechanism. The Z-direction pressure sensor feeds back a pressure value to the controller, the controller judges and recognizes whether the angular adjustment mechanism needs to anticlockwise rotate by a specific angle or not, after rotation, the controller calculates and drives the direction dynamic positioning of the linear motor in real time according to the number of cycles and whether the servo press needs to continue press fitting or not according to detection values of the X-direction sensor, the Y-direction sensor and the Z-direction sensor in the whole process; the device is simple in structure and low in cost, has pressure feedback dynamic positioning, and can effectively improve the assembly precision and reduce the abnormal stress alarm frequency, thereby improving the production line efficiency and the assembly quality.

Description

Technical Field

[0001] The invention belongs to the technical field of rotor assembly tooling, in particular to an electric drive rotor assembly tooling and a use method thereof. Background Art

[0002] In the electric drive assembly production line of the new energy industry, the rotor assembly is assembled into the reducer, and the rotor shaft spline needs to be aligned and inserted with the spline sleeve in the reducer. Since the rotor assembly has no angular positioning or inaccurate positioning, the angular direction of the spline sleeve in the reducer is also random. The rotor assembly needs to adjust the angle and docking pressure multiple times so that the spline shaft can be assembled into the spline sleeve. In this solution, before assembly, most of the rotor shaft splines are in contact with the spline sleeve assembly end face, and there is a certain pressure. On the one hand, the friction generated during rotation recognition has the risk of damaging the spline shaft or sleeve. On the other hand, the friction will drive the reducer spline sleeve to rotate, making the spline shaft unable to be recognized, resulting in a timeout alarm. At the same time, due to certain errors in the production line positioning tray tooling, the entire assembly process is rigidly matched, which will cause the pressure displacement curve of the press-fitting to frequently exceed the preset window and show irregularity, seriously affecting the production line equipment start-up rate and product assembly quality.

[0003] There is also an assembly process in the industry, which is to use two industrial cameras to take pictures of the rotor assembly spline shaft and the reducer spline sleeve respectively. The camera controller identifies the angle deviation, and the control mechanism adjusts the rotor shaft angle to ensure that the rotor shaft spline and the spline sleeve are exactly aligned, and then the press fitting is completed. Due to the small inner diameter of the spline sleeve, the deep position, and the need to add a mechanism to prevent the spline sleeve from rotating after taking the picture, the existing camera and its light source are relatively large in size, bloated in structure, complex in action, unsatisfactory in photography, low in recognition rate, too high in hardware cost, very difficult to debug, and unstable in detection. At the same time, this solution also cannot solve the problem of irregular displacement and pressure curves during spline assembly, and the potential risk of spline damage cannot be avoided. Summary of the invention

[0004] In view of the above problems, the present invention provides an electrically driven rotor assembly tool and a method of using the same, including a drive motor, a servo press, an XY adjustment mechanism and an angular adjustment mechanism. The drive motor can drive the servo press and the tool to move up and down as a whole. The rotor clamping cylinder carries the rotor assembly down to a specified position. The Z-axis pressure sensor feeds back the pressure value to the controller. The controller determines whether the angular adjustment mechanism needs to rotate counterclockwise by a specific angle. After rotation, the controller determines whether the servo press needs to continue press assembly based on the number of cycles. The entire process is driven by dynamic positioning of the linear motor direction calculated in real time by the detection values ​​of the XYZ sensors. The present invention has a simple structure, low cost, and dynamic positioning with pressure feedback, which can effectively improve assembly accuracy and reduce the frequency of abnormal force alarms, thereby improving production line efficiency and assembly quality.

[0005] The technical solution of the present invention is as follows: an electrically driven rotor assembly tool, comprising: a drive motor, a servo press, an XY adjustment mechanism and an angular adjustment mechanism, wherein the drive motor can drive the servo press and the tool to move up and down as a whole,

[0006] The XY adjustment mechanism includes a servo motor, a reducer, an X-axis linear motor, a Y-axis linear motor, a moving base plate, a linear slide rail, a structural gear connecting base plate, an active gear and a passive structural gear. The moving base plate is fixed on the slider of the linear slide rail, the Y-axis linear motor is arranged below the moving base plate, the X-axis linear motor is arranged on the lower side of the Y-axis linear motor, and they are connected through a connecting plate. The structural gear connecting base plate is fixed to the lower side of the X-axis linear motor bearing, the lower side of the reducer is fixed to the structural gear connecting base plate, the upper side of the reducer is connected to the servo motor, the passive structural gear is connected to the structural gear connecting base plate, the active gear is meshed with the passive structural gear, and the active gear is fixed to the output spindle of the reducer;

[0007] The angular adjustment mechanism includes a rotating bracket, an angular locking base, a base lifting cylinder, a base slide rail, an angular floating base plate, a spring support assembly, a rotor positioning tool, a rotor clamping cylinder, an XY pressure sensor and a Z pressure sensor.

[0008] The rotating bracket is fixed on the lower side of the passive structure gear, two sets of base slide rails are installed in the rotating bracket, the base slide rail slider is fixed on the angular locking base, the piston rod of the base lifting cylinder is connected to the rotating bracket, the cylinder body of the base lifting cylinder is connected to the angular locking base, the upper end of the spring support assembly is connected to the rotating bracket, the lower end of the spring support assembly is fixed on the angular floating base plate, and there is a Z-direction pressure sensor between the components, the rotor positioning tooling is fixed to the angular floating base plate through the slide rails, the XY-direction pressure sensor is installed between the rotating bracket and the angular floating base plate, and the rotor clamping cylinder is fixed on the rotor positioning tooling.

[0009] Furthermore, there are two Y-axis linear motors, which are arranged in parallel below the moving base plate.

[0010] Furthermore, the angular adjustment mechanism also includes a counterweight, which is fixed on the rotor positioning tooling.

[0011] A method for using an electric drive rotor assembly tool, specifically comprising:

[0012] The rotor clamping cylinder carries the rotor assembly, and the tooling drives the rotor assembly to descend to the specified position. The servo press pushes the assembly tooling to carry the rotor assembly downward. The Z-axis pressure sensor feeds back the pressure value to the controller. The controller determines and identifies that if the pressure is greater than the set value, the controller controls the servo press to move upward, and the angular adjustment mechanism rotates counterclockwise by 1 / 5a, where a is the angle between adjacent teeth of the spline. After rotation, the controller determines the number of cycles of the part. If the number of cycles is >5 times, the equipment fault alarm is triggered; if the number of cycles is ≤5 times, the servo press continues to be driven downward. When the Z-axis pressure When the sensor detection value is less than the set value, the servo press presses downward, the XY sensor dynamically detects, and the controller calculates in real time based on the XY sensor detection value to drive the linear motor to dynamically position in the horizontal direction and continue to press downward. The controller collects data from the XY sensor in real time. If the force state is unstable or continues to increase, the angular adjustment mechanism is unlocked so that the rotor shaft entering the spline sleeve can slide angularly with the spline sleeve, and the press continues to press downward. If the force is good, the press is pressed down into place to complete the press installation. If the force state still does not improve, the equipment alarms and the quality assurance site confirms the product status.

[0013] Furthermore, the specified position is 2 mm above the speed reducer spline.

[0014] Furthermore, the downward movement distance is 4 mm and the upward movement distance is 4 mm.

[0015] The beneficial effects of the present invention are:

[0016] The present invention does not rotate during the pressing process, thus avoiding friction or damage between the spline shaft and the spline sleeve during the assembly process. On the rotor positioning tool: the four pressure sensors on the upper tool feed back the pressure values, and the industrial computer calculates the required movement offset of the XY axis linear motor slide rails, and the linear motor slide rails actively adjust their positions, so that the spline shaft of the rotor assembly fixed by the assembly tool is not subjected to radial force or is subjected to uniform force during the pressing process, ensuring that the trend of the pressing curve is consistent. At the same time, the tool also has an angular floating function, which is used to solve the angular deviation caused by poor interchangeability and inaccurate positioning of the pallets, and provide a guarantee for high-quality assembly of the rotor. This solution has a simple structure, low cost, and dynamic positioning with pressure feedback, which can effectively improve assembly accuracy and reduce the frequency of abnormal force alarms, thereby improving production line efficiency and assembly quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a simplified diagram of the press-fitting tooling.

[0018] Figure 2 This is the press control flow chart.

[0019] Figure 3 This is a simplified diagram of the XY adjustment structure I.

[0020] Figure 4 Structural diagram for XY adjustment II

[0021] Figure 5 Schematic diagram of the angular adjustment mechanism

[0022] In the figure:

[0023] 1. Driving motor, 2. XY adjustment mechanism, 3. Angular adjustment mechanism, 4. Servo press, 201. Servo motor, 202. Reducer, 203. X-axis linear motor, 204. Y-axis linear motor, 205. Moving base plate, 206. Linear slide rail, 207. Structural gear connecting base plate, 208. Active gear, 209. Passive structural gear, 301. Rotating bracket, 302. Angular locking base, 303. Base lifting cylinder, 304. Base slide rail, 305. Angular floating base plate, 306. Spring support assembly, 307. Rotor positioning tooling, 308. Rotor clamping cylinder, 309. Counterweight, 310. XY-axis pressure sensor, 311. Z-axis pressure sensor. DETAILED DESCRIPTION

[0024] It should be noted that in the description of the present invention, the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", "clockwise", "counterclockwise", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction.

[0025] In the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect" and the like should be understood in a broad sense. For example, "fixed" can be a fixed connection, a detachable connection, or an integral connection; the connection can be a mechanical connection or an electrical connection; the connection can be a direct connection or an indirect connection through an intermediate medium, and can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] An electrically driven rotor assembly tooling includes a driving motor 1, a servo press 4, an XY adjustment mechanism 2 and an angular adjustment mechanism 3. The driving motor 1 drives the servo press 4 and the tooling to move up and down as a whole, generally moving to about 2mm above the spline position. The servo press 4 presses the rotor. The assembly tooling adjustment part includes the XY adjustment mechanism 2 and the angular adjustment mechanism 3, wherein the XY adjustment mechanism 2 can feed back the value of the XY pressure sensor 310 to the controller, and the controller calculates the horizontal adjustment amount and drives the two sets of linear motors of the XY adjustment mechanism 2 to move and dynamically position accordingly, so as to ensure the best overall force process of the tooling press. If the adjustment is invalid, the angular adjustment mechanism 3 is opened to complete the free state press assembly of the rotor shaft spline and the spline sleeve.

[0027] The initial state is that the rotor clamping cylinder 308 carries the rotor assembly, and the driving motor 1 drives the rotor assembly to descend to the specified position. The servo press 4 pushes the assembly tooling to carry the rotor assembly and continue to move downward by 4mm. The Z-axis pressure sensor 311 feeds back the pressure value to the controller. The controller determines and identifies that if the pressure is greater than the set value, it means that the rotor shaft and the spline are not aligned, thereby generating positive pressure. The controller controls the servo press 4 to move upward by 4mm, and the angular adjustment mechanism 3 rotates counterclockwise by 1 / 5a (a is the angle between adjacent teeth of the spline). After rotation, the controller determines the number of cycles of the part. If it is ≤5 times, the press continues to be driven downward by 4mm. If it is >5 times, an equipment failure alarm is issued. When the detection value of the Z-direction pressure sensor 311 is less than the set value, it means that the position of the spline is consistent with the spline sleeve, and the press continues to press downward. The XY-direction sensor 310 performs dynamic detection, and the controller calculates in real time based on the detection value of the XY-direction sensor 310 to drive the linear motor to dynamically position in the horizontal direction and continue to press downward. The controller collects data from the XY-direction sensor 310 in real time. If the force state is unstable or continues to increase, the angular adjustment mechanism 3 is unlocked so that the rotor shaft entering the spline sleeve can slide angularly with the spline sleeve, and the press continues to press downward. If the force is good, the press is pressed into place to complete the press installation. If the force state still does not improve, the equipment alarms and the quality assurance site confirms the product status.

[0028] The XY adjustment mechanism 2 includes a servo motor 201, a reducer 202, an X-axis linear motor 203, a Y-axis linear motor 204, a moving base plate 205, a linear guide rail 206, a structural gear connecting base plate 207, a driving gear 208 and a passive structural gear 209.

[0029] The movable seat plate 205 is fixed on the slider of the linear slide rail 206, two sets of Y-axis linear motors 204 are placed in parallel on the lower side of the movable seat plate 205, the X-axis linear motor 203 is placed on the lower side of the Y-axis linear motor 204, and are connected through a connecting plate, the structural gear connecting base plate 207 is fixed to the lower side of the bearing of the X-axis linear motor 203, the lower side of the reducer 202 is fixed to the structural gear connecting base plate 207, the upper side of the reducer 202 is connected to the servo motor 201, the passive structural gear 209 is connected to the structural gear connecting base plate 207, the active gear 208 is meshed with the passive structural gear 209, and the active gear 208 is fixed on the output spindle of the reducer 202.

[0030] The angular adjustment mechanism 3 includes a rotating bracket 301, an angular locking base 302, a base lifting cylinder 303, a base slide rail 304, an angular floating base plate 305, a spring support assembly 306, a rotor positioning tool 307, a rotor clamping cylinder 308, a counterweight 309, an XY pressure sensor 310 and a Z pressure sensor 311.

[0031] The rotating bracket 301 is fixed on the lower side of the passive structure gear 209, and two sets of base slide rails 304 are installed in the rotating bracket 301. The slider of the base slide rail 304 is fixed on the angular locking base 302. The piston rod of the base lifting cylinder 303 is connected to the rotating bracket 301, and the cylinder body of the base lifting cylinder 303 is connected to the angular locking base 302. The upper end of the spring support assembly 306 is connected to the rotating bracket 301, and the lower end of the spring support assembly 306 is fixed on the angular floating base plate 305, and there is a Z-direction pressure sensor 311 between the components. The rotor positioning tooling 307 is fixed to the angular floating base plate 305 through the slide rails, and the XY-direction pressure sensor 310 is installed between the rotating bracket 301 and the angular floating base plate 305. The rotor clamping cylinder 308 and the counterweight 309 are respectively fixed on the rotor positioning tooling 307.

[0032] The rotor clamping cylinder 308 clamps the rotor, and the servo press 4 moves downward to the specified position, which is generally 2 mm above the reducer spline. The servo press 4 drives the pressure head to move downward by 4 mm. If the spline does not enter, the spring of the spring support assembly 306 is compressed, and the Z-direction pressure sensor 311 exceeds the set value. The servo press 4 returns to the original position, and the servo motor 201 rotates to drive the reducer 202. The active gear 208 rotates with the reducer 202, and drives the passive structural gear 209 to rotate by an angle of 1 / 5a. At the same time, the angular adjustment mechanism 3 connected to the lower side rotates with the passive structural gear 209. The servo press 4 continues to press downward by 4 mm until the spline enters the spline sleeve. The Z-direction pressure sensor 311 is less than the set value. At this time, the XY-direction pressure sensor 310 is started to monitor the pressure in real time. The controller 5 calculates and drives the X-direction linear motor 203 and the Y-direction linear motor 204 to drive the structural gear connection base plate 207 to move horizontally, so that the dynamic adjustment positioning of the rotor is known through the XY-direction pressure sensor 310 to achieve the purpose of reducing the force during the rotor pressing process. If the force in the process is still abnormal, the abnormal state is fed back to the controller through the XY pressure sensor 310 and the displacement relationship of the servo press 4. The controller drives the base lifting cylinder 303 to retract and the angular locking base 302 to rise. The angular floating base plate 305 is not supported by the angular locking base plate 302 and can swing slightly angularly under the pulling force of the spring support assembly 306, so that the rotor can slide freely with the reduction spline sleeve during the press-fitting process, thereby ensuring smooth press-fitting, improving assembly quality, reducing failure rate, and increasing production line capacity and equipment opening rate.

[0033] Determine the included angle a of adjacent splines, lower the upper tooling with the rotor assembly to 2mm above the end face of the spline sleeve, and continue to move downward by 4mm. The pressure sensor of the upper tooling's Z-direction floating mechanism detects that the spline is not inserted into the spline sleeve. The upper tooling rises 4mm, rotates 1 / 5a angle, and moves downward by 4mm. The pressure sensor detects whether the spline is pressed in. If not, it is repeatedly raised 4mm, rotated 1 / 5a angle and pressed four times. If it still cannot be pressed in, an alarm is given; if pressed in, the radial pressure sensing system is started, and the sensor transmits the pressure data to the industrial computer in real time. The industrial computer controls the linear motor slide rail through calculation to drive the rotor shaft positioning tooling to adjust the position, so that the pressing process is as stress-free or evenly stressed as possible, so that the pressing process will not generate an alarm due to local abnormal stress. The pressing process of this process does not rotate, which avoids friction or damage between the spline shaft and the spline sleeve during the assembly process.

[0034] It can interact with PLC and collect pressure displacement data for logical operation or calculation. It is equipped with a database and can set thresholds through self-learning and data analysis to ensure stable press-fitting.

[0035] Relying on the four pressure sensors on the inside of the device, the radial force conditions during the rotor pressing process can be measured in real time and fed back to the industrial computer. The number mentioned in this solution is 4 but not limited to 4.

[0036] The XY linear motor is an overlapping XY linear motor that can achieve precise control of the horizontal direction of the structural gear connection base plate, and can feed back the position to the industrial computer to achieve closed-loop precise control and more timely response.

[0037] The spring of the spring support assembly is compressed by the gravity generated by the tooling, so that the contact force between the rotor shaft and the spline during the press-fitting process is less than the weight of the tooling, reducing relative wear. When the mechanism is unlocked, the angular floating base plate can achieve micro-angle adaptive adjustment to solve the problem of abnormal force caused by the coaxiality difference between the upper and lower tooling.

[0038] The above is only a specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any modification, equivalent replacement and improvement made by any person skilled in the art within the technical scope disclosed by the present invention and within the spirit and principle of the present invention shall be covered within the protection scope of the present invention. At the same time, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0039] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

Claims

1. An electric drive rotor assembly tool, characterized in that: include: Driving motor, servo press, XY adjustment mechanism and angular adjustment mechanism, the driving motor can drive the servo press and the tooling to move up and down as a whole, the XY adjustment mechanism includes a servo motor, a reducer, an X-axis linear motor, a Y-axis linear motor, a movable base plate, a linear slide rail, a structural gear connecting base plate, an active gear and a passive structural gear, the movable base plate is fixed on the slider of the linear slide rail, the Y-axis linear motor is arranged below the movable base plate, the X-axis linear motor is arranged on the lower side of the Y-axis linear motor, and they are connected through a connecting plate, the structural gear connecting base plate is fixed to the lower side of the X-axis linear motor bearing, the lower side of the reducer is fixed to the structural gear connecting base plate, the upper side of the reducer is connected to the servo motor, the passive structural gear is connected to the structural gear connecting base plate, the active gear is meshed with the passive structural gear, and the active gear is fixed on the output spindle of the reducer The angular adjustment mechanism includes a rotating bracket, an angular locking base, a base lifting cylinder, a base slide rail, an angular floating base plate, a spring support assembly, a rotor positioning tooling, a rotor clamping cylinder, an XY pressure sensor and a Z pressure sensor. The rotating bracket is fixed to the lower side of the passive structure gear, and two sets of base slide rails are installed in the rotating bracket. The base slide rail slider is fixed to the angular locking base. The piston rod of the base lifting cylinder is connected to the rotating bracket, and the cylinder body of the base lifting cylinder is connected to the angular locking base. The upper end of the spring support assembly is connected to the rotating bracket, and the lower end of the spring support assembly is fixed to the angular floating base plate, and there is a Z pressure sensor between the components. The rotor positioning tooling is fixed to the angular floating base plate through the slide rail, and the XY pressure sensor is installed between the rotating bracket and the angular floating base plate. The rotor clamping cylinder is fixed to the rotor positioning tooling.

2. The electric drive rotor assembly tool according to claim 1, characterized in that: There are two Y-axis linear motors, which are arranged in parallel below the moving base plate.

3. The electric drive rotor assembly tool according to claim 1, characterized in that: The angular adjustment mechanism also includes a counterweight, which is fixed on the rotor positioning tooling.

4. A method for using an electric drive rotor assembly tool, characterized in that: The following steps are involved: If you go there and meet any one of the requirements 1 to 3, the rotor clamping cylinder of the electrically driven rotor assembly tooling carries the rotor assembly, the tooling drives the rotor assembly to descend to the specified position, the servo press pushes the assembly tooling carrying the rotor assembly to move downward, and the Z-axis pressure sensor feeds back the pressure value to the controller, the controller determines and identifies, if the pressure is greater than the set value, the controller controls the servo press to move upward, the angular adjustment mechanism rotates counterclockwise by 1 / 5a, a is the angle between adjacent teeth of the spline, after rotation, the controller determines the number of cycles of the part, if the number of cycles is >5 times, the equipment fault alarm is triggered; if the number of cycles is ≤5 times, the servo press is continued to be driven The service press moves downward. When the detection value of the Z-axis pressure sensor is less than the set value, the servo press presses downward, and the XY-axis sensor performs dynamic detection. The controller calculates in real time based on the detection value of the XY-axis sensor to drive the linear motor to dynamically position in the horizontal direction and continue to press downward. The controller collects data from the XY-axis sensor in real time. If the force state is unstable or continues to increase, the angular adjustment mechanism is unlocked so that the rotor shaft entering the spline sleeve can slide angularly with the spline sleeve, and the press continues to press downward. If the force is good, the press is pressed into place to complete the press installation. If the force state still does not improve, the equipment alarms and the quality assurance site confirms the product status.

5. The method for using the electric drive rotor assembly tool according to claim 4, characterized in that: The specified position is 2 mm above the speed reducer spline.

6. The method for using the electric drive rotor assembly tool according to claim 4, characterized in that: The downward movement distance is 4mm and the upward movement distance is 4mm.

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