Rotary transformer zero point adjusting equipment special for motor

Abstract

The utility model relates to the technical field of automation, and discloses a rotary transformer zero point adjusting device special for a motor. Comprising a zeroing mechanism, a fixing mechanism and a clamping and transferring mechanism which are arranged on a base plate. The zero setting mechanism is composed of a fixing and retreating part and an adjusting part, the fixing and retreating part is provided with a testing module, an ejector pin and a spring supporting structure, the adjusting part drives an ejector rod through an air cylinder to be matched with a damper to achieve fine adjustment of the rotor, and the ejector rod, the ejector pin and the testing module are coaxially arranged to ensure adjusting precision; the fixing mechanism adopts a bearing seat and a clamping air cylinder to fix a motor, and a one-way rotating limiting shaft is embedded into a spindle notch to prevent the spindle from rotating when a nut is locked; and the clamping transfer mechanism realizes accurate transfer and installation of the rotor through guide rail positioning and a clamping arm sensor. According to the utility model, the problems of limited traditional manual adjustment space, repeated installation error and main shaft offset are solved, the zero point adjustment efficiency and the assembly stability are obviously improved, and the reject ratio is reduced.

Description

Technical Field

[0001] This utility model relates to the field of automation technology, and in particular to a zero-point adjustment device for a rotary transformer specifically for motors. Background Technology

[0002] A rotary transformer is a special type of small AC motor that can be used to accurately detect the angular displacement and angular velocity of the motor rotor, and is one of the important components of a motor.

[0003] The installation process for certain motor models involves zero-point adjustment of the resolver. First, the resolver stator is fixed to the designated position on the motor's end cover using a snap-ring mechanism and screws. Then, the resolver rotor is installed on the motor's main shaft. The resolver rotor is rotated for zero-point adjustment, and a feedback signal confirms the adjustment is complete. After reaching zero, a mark is made between the resolver rotor and stator using a marker. The resolver rotor is then removed, coated with special bearing adhesive, and returned to its original position. The marked positions are aligned before being tightened with a nut. While tightening the nut, the motor main shaft must remain stationary.

[0004] When adjusting the zero point of the resolver using the above process, the limited space makes manual adjustment inconvenient. Repeated installation of the resolver rotor increases adjustment errors. If an operational error occurs after applying bearing adhesive, the resolver rotor is difficult to remove, increasing the workload and product defect rate. Production using the above process without the assistance of specialized equipment carries risks and errors.

[0005] There is an urgent need in production for a zero-point adjustment device that is easy to operate manually and convenient to assemble. Utility Model Content

[0006] The present invention aims to solve at least one of the technical problems existing in the related art. To this end, the present invention provides a zero-point adjustment device for a rotary transformer specifically for electric motors.

[0007] A zero-point adjustment device for a rotary transformer specifically for motors includes a zero-adjustment mechanism, which is fixed on a base plate.

[0008] The zeroing mechanism includes a fixing and retraction component and an adjustment component.

[0009] The fixing and retracting components are used for support and testing during rotor zeroing.

[0010] The adjusting component is used to perform a stabilizing adjustment operation on the rotor.

[0011] The fixing and retracting components are equipped with ejector pins and test modules.

[0012] A push rod is installed on the adjusting component.

[0013] The rotation axes of the push rod, push pin, and test module are coaxial.

[0014] Furthermore, the fixing and retraction component includes a first support block fixed on the base plate, a retraction mechanism fixed on the first support block, a module fixing seat provided on the retraction mechanism, and a test module installed in the module fixing seat. The test module is used to test whether the rotor is adjusted to the zero position that matches the motor.

[0015] The test module is a rotary transformer stator, and its fixed angle is the same as that of the motor stator. The test module is also connected to a zero-position test device.

[0016] Furthermore, the first support block is also provided with a first support seat, which is U-shaped and has two support arms, each of which is provided with an oil-free bushing.

[0017] A ejector pin is installed inside the first support base. The ejector pin is connected to the first support base through an oil-free bushing. The ejector pin can rotate and move inside the first support base.

[0018] A handle is provided at one end of the ejector pin, and a limit ring is provided at the inner side of the ejector pin when it is located in the U-shape of the first support seat. The limit ring is located on the side close to the module fixing seat. A spring is also sleeved on the ejector pin, and the spring is located between the limit ring and the first support seat.

[0019] Furthermore, the adjusting component includes a second support block and a pressure applying mechanism disposed on the second support block, wherein the pressure applying mechanism is a cylinder;

[0020] The pressure-applying mechanism is also provided with a second support seat, which is U-shaped and has two support arms. Each support arm is provided with an oil-free bushing. A top rod is installed inside the second support seat.

[0021] Furthermore, a knob is provided at one end of the top rod, and a damper is also provided on the second support base; the damper can ensure that the rotation stops at any time when it reaches a certain angle during the adjustment process.

[0022] Furthermore, it also includes a fixing mechanism and a clamping and transferring mechanism.

[0023] The fixing mechanism is used to fix the motor and restrict the rotation of the motor's main shaft when the rotor is installed;

[0024] The clamping and transferring mechanism is used to transfer the rotor, which has been adjusted to zero position, to the motor for installation.

[0025] A support bar is also installed at one end of the fixed base.

[0026] Furthermore, the fixing mechanism includes a support seat fixed on the base plate and a baffle installed on one side of the support seat; the support seat and the baffle are used to support the motor and position the motor; a clamping plate is also provided on one side of the support seat; the clamping plate is connected to a clamping cylinder; the clamping cylinder drives the clamping plate to perform a clamping operation to fix the motor.

[0027] A one-way rotation limit shaft is also provided on one side of the clamping plate; the one-way rotation limit shaft is set on the one-way rotation seat, and the one-way rotation limit shaft protrudes from the clamping plate through the notch on the clamping plate. The one-way rotation limit shaft is used to fix the main shaft of the motor and prevent the main shaft from rotating; the one-way rotation limit shaft is provided with an insert tooth, and the shape of the insert tooth is consistent with the shape of the notch of the insert component provided at one end of the main shaft.

[0028] The rotation direction of the unidirectional rotation limit shaft is opposite to the locking direction of the nut on the main shaft that locks the rotor.

[0029] Furthermore, the clamping and transferring mechanism includes a transfer guide rail disposed on the substrate, a transfer seat disposed on the transfer guide rail, and a proximity guide rail and a proximity base connected to the proximity guide rail disposed on the transfer seat;

[0030] Limiting blocks are installed on the substrate and are located on both sides of the transfer guide rail to limit the movement position of the clamping and transfer mechanism to the position where the rotor is clamped and the rotor is installed.

[0031] A retainer is installed close to the base, and a pair of clamping arms are fixed in the retainer. Each clamping arm is also provided with a chuck on its inner side, and the inner shape of the chuck matches the shape of the rotor.

[0032] Contact sensors are installed on both sides of the clamping arm to detect when the rotor is installed in place on the spindle.

[0033] A transfer handle is installed on the transfer seat.

[0034] Furthermore, the rotation axes of the push rod, push pin, and test module are coaxial, and the rotation axes of the three are on the same horizontal plane as the rotation axis of the motor spindle, which is parallel to the substrate.

[0035] Furthermore, the heads of the push rod and the push pin are provided with rubber sleeves.

[0036] The above-described one or more technical solutions in the embodiments of this utility model have at least one of the following technical effects:

[0037] By using pneumatic and simple electronic control mechanisms, the experience-based manual adjustment method has been replaced, achieving stable clamping of the rotor of the small rotary transformer, accurate rotor zero-position adjustment, and convenient assembly.

[0038] The rotation of the main shaft is conveniently restricted by the unidirectional rotation limit shaft during rotor installation, which solves the problem of the motor main shaft rotating with the fixing nut when the rotor is fixed. This greatly improves the convenience of manual operation, enhances production stability, and reduces the defect rate.

[0039] The equipment is designed to match the manufacturing process, has a compact structure, and is small in size for easy movement. It also adopts a modular design, making it suitable for the assembly and commissioning of various types of rotary transformers.

[0040] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0042] Figure 1 This is a diagram illustrating the rotor zero-point adjustment process of the rotary transformer zero-point adjustment device for motors, which is based on this utility model.

[0043] Figure 2 This is a diagram showing the rotor installation of the zero-point adjustment device for a rotary transformer specifically designed for electric motors, according to this utility model.

[0044] Figure 3 This is a three-dimensional structural diagram of the rotary transformer zero-point adjustment device for motors, which is a specific invention.

[0045] in:

[0046] 1. Motor; 1-1. Bearing seat; 1-2. Baffle; 1-3. Clamping plate; 1-4. Clamping cylinder; 1-5. One-way rotating seat; 1-6. One-way rotating limit shaft; 1-7. Embedded gear; 1-8. Main shaft; 1-9. Embedded component;

[0047] 2-1. First support block; 2-2. Retraction mechanism; 2-3. Module fixing seat; 2-4. Test module; 2-5. Ejector pin; 2-6. First support seat; 2-7. Handle; 2-8. Spring; 2-9. Limiting ring; 2-10. Support bar;

[0048] 3-1. Second support block; 3-2. Pressure applying mechanism; 3-3. Second support base; 3-4. Top rod; 3-5. Knob; 3-6. Damper;

[0049] 4-1. Approach base; 4-2. Approach guide rail; 4-3. Transfer seat; 4-4. Transfer guide rail; 4-5. Limit block; 4-6. Fixing device; 4-7. Clamping arm; 4-8. Clamping head; 4-9. Transfer handle;

[0050] 5. Rotor; 6. Base plate. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. The following embodiments are used to illustrate this utility model but should not be used to limit its scope.

[0052] This invention proposes a zero-point adjustment device for a rotary transformer specifically designed for motors. This device assists in manual operation, improves the zero-point adjustment accuracy of the rotary transformer, completely avoids the operational risks associated with repeatedly installing the rotary transformer rotor, and effectively assists in the zero-point adjustment of the motor.

[0053] like Figure 1 , Figure 2 , Figure 3 The diagram shows the components of a rotary transformer zero-point adjustment device for electric motors and the rotor transfer method after zeroing.

[0054] A rotary transformer zero-point adjustment device for a motor 1 includes a fixing mechanism, a zero-adjustment mechanism, and a clamping and transferring mechanism mounted on a base plate 6.

[0055] The fixing mechanism includes a support seat 1-1 fixed on the base plate 6 and a baffle 1-2 installed on one side of the support seat 1-1;

[0056] The support seat 1-1 and the baffle 1-2 are used to support the motor 1 and to position the motor 1;

[0057] A clamping plate 1-3 is also provided on one side of the bearing seat 1-1; the clamping plate 1-3 is connected to a clamping cylinder 1-4; the clamping cylinder 1-4 drives the clamping plate 1-3 to perform a clamping operation on the motor 1, thereby fixing the motor 1.

[0058] A one-way rotation limiting shaft 1-6 is also provided on one side of the clamping plate 1-3; the one-way rotation limiting shaft 1-6 is set on the one-way rotation seat 1-5, and the one-way rotation limiting shaft 1-6 protrudes out of the clamping plate 1-3 through the notch on the clamping plate 1-3.

[0059] The one-way rotation limit shaft 1-6 is used to fix the main shaft 1-8 of the motor 1 and prevent the main shaft 1-8 from rotating when the rotor 5 is installed on the main shaft 1-8. The rotation direction of the one-way rotation limit shaft 1-6 is opposite to the tightening direction of the nut on the main shaft 1-8 that locks the rotor 5.

[0060] The implementation method is that an inserting tooth 1-7 is provided on the unidirectional rotation limiting shaft 1-6, and the shape of the inserting tooth 1-7 is consistent with the notch shape of the inserting component 1-9 provided at one end of the main shaft 1-8.

[0061] For example, the shape of the insert teeth 1-7 and the shape of the notch of the insert parts 1-9 can be set to a straight line or a cross shape.

[0062] The zeroing mechanism consists of a fixing and retraction component and an adjustment component.

[0063] The fixing and retraction components are used for support and testing during rotor 5 zeroing;

[0064] The adjustment component is used to perform a stabilization adjustment operation on rotor 5.

[0065] The fixing and retraction components include a first support block 2-1 fixed on the base plate 6, a retraction mechanism 2-2 fixed on the first support block 2-1, a module fixing seat 2-3 provided on the retraction mechanism 2-2, and a test module 2-4 installed in the module fixing seat 2-3. The test module 2-4 is used to test whether the rotor 5 is adjusted to the zero position that matches the motor 1.

[0066] Test module 2-4 is the stator of the rotary transformer. Its fixed angle and position are the same as those of the stator of motor 1. Test module 2-4 is also connected to a zero-position test device.

[0067] To ensure stable entry and exit of rotor 5 when moving in and out of test module 2-4, a support bar 2-10 is installed at one end of the fixed base. The support bar 2-10 is used to support rotor 5 when it is pushed out of the module, and also facilitates the subsequent transfer of rotor 5.

[0068] The first support block 2-1 is also provided with a first support seat 2-6. The first support seat 2-6 is U-shaped and has two support arms. Each support arm is provided with an oil-free bushing.

[0069] A ejector pin 2-5 is installed inside the first support 2-6. The ejector pin 2-5 is connected to the first support 2-6 through an oil-free bushing. The ejector pin 2-5 can rotate and move inside the first support 2-6. To ensure that the resolver rotor 5 is not damaged during clamping, a rubber sleeve is provided on the head of the ejector pin 2-5.

[0070] A handle 2-7 is provided at one end of the ejector pin 2-5; a limiting ring 2-9 is provided on the inner side of the ejector pin 2-5 at the U-shaped position of the first support seat 2-6, and the limiting ring 2-9 is located on the side close to the module fixing seat 2-3; a spring 2-8 is also sleeved on the ejector pin 2-5, and the spring 2-8 is located between the limiting ring 2-9 and the first support seat 2-6.

[0071] The adjusting component includes a second support block 3-1 and a pressure applying mechanism 3-2 disposed on the second support block 3-1, wherein the pressure applying mechanism 3-2 is a cylinder;

[0072] The pressure mechanism 3-2 is also equipped with a second support seat 3-3; the second support seat 3-3 is U-shaped and has two support arms, each of which is equipped with an oil-free bushing; a push rod 3-4 is installed inside the second support seat 3-3; in order to ensure that the resolver rotor 5 is not damaged during clamping, a rubber sleeve is provided at the head of the push rod 3-4.

[0073] A knob 3-5 is provided at one end of the top rod 3-4, and a damper 3-6 is also provided on the second support 3-3; the damper 3-6 can ensure that the rotation stops at any time when it reaches a certain angle during the adjustment process, so that the adjustment process can be stable and accurate and the rotation is smooth during adjustment.

[0074] The push rod 3-4, the push pin 2-5 and the test module 2-4 are concentrically arranged, and the concentric rotation axis of the three is on the same horizontal plane as the rotation axis of the motor 1 spindle 1-8, which is parallel to the substrate.

[0075] The clamping and transfer mechanism includes a transfer guide rail 4-4 disposed on the substrate 6, a transfer seat 4-3 disposed on the transfer guide rail 4-4, a proximity guide rail 4-2 disposed on the transfer seat 4-3 and a proximity base 4-1 connected to the proximity guide rail;

[0076] Limiting blocks 4-5 are mounted on the base plate 6; the limiting blocks 4-5 are located on both sides of the transfer guide rail 4-4, and are used to limit the movement position of the clamping and transfer mechanism to the position where the rotor 5 is clamped and the rotor 5 is installed. The limiting blocks 4-5 also have a buffering function.

[0077] A retainer 4-6 is installed on the base 4-1. The retainer 4-6 fixes a pair of clamping arms 4-7. Each clamping arm 4-7 is also provided with a chuck 4-8 ​​on its inner side. The inner shape of the chuck 4-8 ​​matches the shape of the rotor 5 and is provided with a non-slip and wear-resistant protective layer. The protective layer can be made of rubber or polyurethane. A transfer handle 4-9 is installed on the transfer seat 4-3.

[0078] Contact sensors are installed on both sides of the clamping arms 4-7 to detect when the rotor 5 is installed on the main shaft 1-8.

[0079] When using,

[0080] The motor is placed in the bearing seat to achieve vertical positioning, and the baffle achieves horizontal positioning; the clamping cylinder is activated to drive the clamping plate to clamp the motor, providing a stable operating foundation for subsequent operations.

[0081] Rotate the one-way rotation limit shaft to insert the insert teeth into the notch of the insert component of the main shaft. Due to the one-way rotation limitation of the one-way rotation limit shaft, the main shaft will not rotate when the rotor is installed later.

[0082] The movable clamping and transferring mechanism positions the clamps on both sides of the support bar.

[0083] Place the rotor on the support bar and start the pressure mechanism. The push rod presses the rotor into the test module. Since the push pin presses against the rotor in the opposite direction, the rotor can be positioned exactly in the center of the test module. Under the limitation of the damper, rotate the push rod to adjust the rotor to zero point. During the adjustment process, it can be ensured that the rotor can be stopped at any time when it reaches a certain angle, so that the adjustment process can be stable and accurate and the rotation can be smooth during adjustment.

[0084] Rotate the rotor to the zero position corresponding to the electrode.

[0085] After the zero-point adjustment is completed, the fixing and retraction components retract, the rotor is pushed out of the test module by the ejector pin, the clamping and transfer mechanism clamps the rotor, and the pressure mechanism of the adjustment component retracts.

[0086] Then, the clamping and transfer mechanism installs the rotor on the motor spindle through stable movement on the guide rail, and tightens the nut that fixes the rotor. Since the rotation direction of the unidirectional rotation limit shaft is opposite to the locking direction of the nut that locks the rotor on the spindle, it can be ensured that the spindle will not rotate and cause zero position offset when fixing the rotor.

[0087] Because the installation space on the motor is limited, and the small size of the rotary transformer makes it difficult to operate on the motor, the zero-point adjustment of the rotary transformer is moved to be completed outside the motor. An adjustment station is set up at the same height on the left side of the actual rotary transformer installation position on the motor, enabling adjustment of the rotary transformer and solving the problem of inconvenient adjustment in small spaces.

[0088] The control cylinder drives the zero-point adjustment component, causing the damper-equipped push rod to press the rotor into the test module of the fixing and retraction component, aligning the rotor with the stator. The push rod adjusts the rotor for zero-point calibration. Adjusting the rotor via a knob allows for precise control of the rotation angle for fine-tuning in both forward and reverse directions, avoiding errors caused by manual adjustment.

[0089] After zero-point adjustment is completed, the control cylinder retracts the stator in the adjustment position to expose the adjusted rotor. The rotor is then moved to the corresponding installation position by the clamping and transfer mechanism for installation. During installation, the unidirectional rotation limit shaft effectively prevents the spindle from rotating when the nut is installed. After installation, the entire equipment can be reset and the motor removed.

[0090] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A zero-point adjustment device for a rotary transformer specifically designed for electric motors, characterized in that, Includes a zeroing mechanism, which is fixed on the base plate; The zeroing mechanism includes a fixing and retraction component and an adjustment component. The fixing and retracting components are used for support and testing during rotor zeroing. The adjusting component is used to perform a stabilizing adjustment operation on the rotor. The fixing and retracting components are equipped with ejector pins and test modules. A push rod is installed on the adjusting component. The rotation axes of the push rod, push pin, and test module are coaxial.

2. The zero-point adjustment device for a rotary transformer specifically for motors according to claim 1, characterized in that, The fixing and retraction component includes a first support block fixed on the base plate, a retraction mechanism fixed on the first support block, a module fixing seat provided on the retraction mechanism, and a test module installed in the module fixing seat. The test module is used to test whether the rotor is adjusted to the zero position that matches the motor. The test module is a rotary transformer stator, and its fixed angle is the same as that of the motor stator. The test module is also connected to a zero-position test device.

3. The zero-point adjustment device for a rotary transformer specifically for motors according to claim 2, characterized in that, The first support block is also provided with a first support seat, which is U-shaped and has two support arms, each of which is provided with an oil-free bushing. A ejector pin is installed inside the first support base. The ejector pin is connected to the first support base through an oil-free bushing. The ejector pin can rotate and move inside the first support base. A handle is provided at one end of the ejector pin, and a limit ring is provided at the inner side of the ejector pin when it is located in the U-shape of the first support seat. The limit ring is located on the side close to the module fixing seat. A spring is also sleeved on the ejector pin, and the spring is located between the limit ring and the first support seat.

4. The zero-point adjustment device for a rotary transformer specifically for motors according to claim 1, characterized in that, The adjusting component includes a second support block and a pressure applying mechanism disposed on the second support block, wherein the pressure applying mechanism is a cylinder; The pressure-applying mechanism is also provided with a second support seat, which is U-shaped and has two support arms. Each support arm is provided with an oil-free bushing. A top rod is installed inside the second support seat.

5. The zero-point adjustment device for a rotary transformer specifically for motors according to claim 4, characterized in that, A knob is provided at one end of the top rod, and a damper is also provided on the second support base; the damper can ensure that the rotation stops at any time when it reaches a certain angle during the adjustment process.

6. The zero-point adjustment device for a rotary transformer specifically for motors according to any one of claims 1 to 5, characterized in that, It also includes a fixing mechanism and a clamping and transferring mechanism. The fixing mechanism is used to fix the motor and restrict the rotation of the motor's main shaft when the rotor is installed; The clamping and transferring mechanism is used to transfer the rotor, which has been adjusted to zero position, to the motor for installation. A support bar is also installed at one end of the fixed base.

7. The zero-point adjustment device for a rotary transformer specifically for motors according to claim 6, characterized in that, The fixing mechanism includes a support base fixed on the base plate and a baffle installed on one side of the support base; the support base and the baffle are used to support the motor and position the motor; a clamping plate is also provided on one side of the support base; the clamping plate is connected to a clamping cylinder; the clamping cylinder drives the clamping plate to perform a clamping operation to fix the motor. A one-way rotation limit shaft is also provided on one side of the clamping plate; the one-way rotation limit shaft is set on the one-way rotation seat, and the one-way rotation limit shaft protrudes from the clamping plate through the notch on the clamping plate. The one-way rotation limit shaft is used to fix the main shaft of the motor and prevent the main shaft from rotating; the one-way rotation limit shaft is provided with an insert tooth, and the shape of the insert tooth is consistent with the shape of the notch of the insert component provided at one end of the main shaft. The rotation direction of the unidirectional rotation limit shaft is opposite to the locking direction of the nut on the main shaft that locks the rotor.

8. The zero-point adjustment device for a rotary transformer specifically for motors according to claim 6, characterized in that, The clamping and transferring mechanism includes a transfer guide rail disposed on the substrate, a transfer seat disposed on the transfer guide rail, and a proximity guide rail and a proximity base connected to the proximity guide rail disposed on the transfer seat; Limiting blocks are installed on the substrate and are located on both sides of the transfer guide rail to limit the movement position of the clamping and transfer mechanism to the position where the rotor is clamped and the rotor is installed. A retainer is installed close to the base, and a pair of clamping arms are fixed in the retainer. Each clamping arm is also provided with a chuck on its inner side, and the inner shape of the chuck matches the shape of the rotor. Contact sensors are installed on both sides of the clamping arm to detect when the rotor is installed in place on the spindle. A transfer handle is installed on the transfer seat.

9. The zero-point adjustment device for a rotary transformer specifically for motors according to claim 6, characterized in that, The rotation axes of the push rod, push pin, and test module are coaxial, and the rotation axes of the three are on the same horizontal plane as the rotation axis of the motor spindle, which is parallel to the substrate.

10. The zero-point adjustment device for a rotary transformer specifically for motors according to claim 1, characterized in that, The heads of the push rod and the push pin are provided with rubber sleeves.

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