A mechanical zeroing tool for motor resolver

Abstract

The present invention provides a mechanical zeroing tool for a motor resolver, which makes the tooling have good versatility. The positioning block is used to locate the resolver mounting hole step of the motor end cover for radial centering setting. The central area of ​​the positioning block is provided with a center ring, and the center ring is concave toward the outer end surface area to form a first bearing through hole and a second spring positioning groove, the first bearing through hole is provided with a bearing, and the second spring positioning groove is provided with a compression spring. It also includes a connecting rod, a knob screw, an adjusting nut, a hand crank, and a hollow shaft. The connecting rod includes a central sleeve and convex rods on both sides. The central axis of the central sleeve is provided with a central through hole with a key, and the outer end of the compression spring is top-mounted on the rear end surface of the central sleeve. The center of the hollow shaft is provided with a second central through hole, and the outer peripheral length direction of the hollow shaft is provided with a concave keyway, and the rear end area of ​​the hollow shaft is provided with a threaded section.

Description

Technical Field

[0001] The invention relates to the technical field of resolver zero adjustment, and in particular to a motor resolver mechanical zero adjustment tool. Background Art

[0002] At present, the zero adjustment tooling for motor resolvers generally makes a specific adapter according to the form of the motor shaft output end, and then uses the adapter to rotate the motor shaft to change the angle of the resolver rotor to achieve the purpose of zero adjustment. Therefore, different motors require different adapters, making the universality of the zero adjustment tooling relatively poor. Summary of the invention

[0003] In view of the above problems, the present invention provides a motor resolver mechanical zeroing tool, which makes the tool have good versatility.

[0004] A motor resolver mechanical zeroing tool, characterized in that it includes a positioning block, the positioning block is used to position the resolver mounting hole step of the motor end cover for radial centering setting, a center ring is arranged in the central area of ​​the positioning block, and the center ring is concave toward the outer end surface area to form a first bearing through hole and a second spring positioning groove, a bearing is arranged in the first bearing through hole, and a compression spring is arranged in the second spring positioning groove, and it also includes a connecting rod, a knob screw, an adjusting nut, a hand crank, and a hollow shaft, the connecting rod includes a center sleeve and convex rod portions on both sides, a center through hole with a key is arranged in the central axial direction of the center sleeve, the outer end of the compression spring is mounted on the rear end surface of the center sleeve, the center of the hollow shaft is provided with a second center through hole, and the hollow A concave keyway is provided in the outer length direction of the core shaft, and a threaded section is provided in the rear end area of ​​the hollow shaft. After the hollow shaft is inserted into the center through hole, the front end is inserted and positioned in the inner ring of the bearing. A key structure is provided in the center hole of the hand crank handle. The hand crank handle is sleeved on the rear end area of ​​the hollow shaft and arranged in alignment with the concave keyway. The adjusting nut is threadedly connected and sleeved on the rear end threaded section of the hollow shaft. After the screw end of the knob screw passes through the second center through hole of the hollow shaft, it is threadedly fixed to the center concave threaded hole of the motor shaft. The outer end of the side convex rod portion is provided with a long slot hole passing through the thickness direction. After the screw passes through the long slot hole, the inner end is inserted into the locking waist groove at the corresponding position of the ring cloth of the rotary transformer stator, and the position of the screw corresponding to the long slot hole is locked by upper and lower nuts.

[0005] It is further characterized by:

[0006] The rear end surface of the central sleeve is provided with a spring positioning boss, the outer end of the compression spring is sleeved on the spring positioning boss and mounted on the rear end surface of the central sleeve to ensure reliable and stable positioning;

[0007] The outer ring of the positioning block is provided with a forward convex positioning ring at a position facing the step of the resolver mounting hole of the motor end cover, and the forward convex positioning ring is embedded in the step of the resolver mounting hole to ensure the central arrangement;

[0008] The connecting parts of the central ring and the outer ring of the positioning block are a plurality of connecting rods, and the screw rods are arranged through the gap areas between adjacent connecting rods during assembly.

[0009] A method for using a mechanical zeroing tool for a motor resolver, characterized in that the limiting block of the zeroing part of the resolver stator is first matched with the step of the resolver mounting hole on the motor end cover, that is, at this time, the tool, the resolver and the motor shaft are ensured to be concentric, then the screw is inserted into the locking waist groove of the resolver stator, then locked, and the screwing depth of the adjusting nut on the hollow shaft is adjusted until the end face of the screw contacts the bottom face of the resolver mounting hole on the motor end cover, at this time, the compression spring will have a certain amount of compression in the axial direction, and then the knob screw passes through the hollow shaft and is screwed into the central concave threaded hole on the motor shaft, and the preparation work is completed;

[0010] During the zeroing step, the knob screw is twisted, the motor shaft will be rotated and the reading on the resolver will change accordingly. When the reading on the resolver is close to the required resolver value, the knob screw is stopped from being twisted. Then, the hand crank is fine-tuned. Due to the effect of the keyway, the hollow shaft and the connecting rod will rotate synchronously with the hand crank. At this time, the screw is locked on the connecting rod, and the screw rotates around the hollow shaft, thereby pushing the resolver stator core to rotate circumferentially. At this time, the reading on the resolver is fine-tuned until the reading on the resolver reaches the required target value. Then, the hand crank is stopped from being fine-tuned. The position of the resolver stator is kept unchanged, and then several screws are passed through the locking waist groove on the resolver stator core and screwed into the mounting threaded holes on the motor end cover. The resolver stator is locked at this time, and this position is the target position required for resolver zeroing. After the resolver zeroing is completed, the tooling is removed and all the mounting screws of the resolver stator are installed in place.

[0011] After adopting the present invention, the common installation characteristics of the resolver rotor are utilized, and the knob screw is matched with the central concave threaded hole on the motor shaft to rotate the motor shaft, thereby changing the angle of the resolver rotor. The present invention is suitable for the zeroing requirements of resolvers of different models and specifications of motors, and has greater versatility. The radial position of the screw on the long slot hole can be adjusted so that the screw is embedded in the locking waist-shaped groove of the resolver stator to drive the stator to rotate, so the tooling meets the zeroing requirements of resolver stators of different sizes and specifications. The axial compression amount of the compression spring is changed by adjusting the adjusting nut, so the zeroing requirements of resolvers of different axial installation depths of different motors can be met. The versatility of the tooling is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0013] Figure 2It is a cross-sectional structural schematic diagram of the present invention applied to resolver zero adjustment;

[0014] The names corresponding to the serial numbers in the figure are as follows:

[0015] Positioning block 1, center ring 11, first bearing through hole 12, second spring positioning groove 13, outer ring 14, front convex positioning ring 15, connecting rod 16, bearing 2, compression spring 3, connecting rod 4, center sleeve 41, side convex rod 42, center through hole 43, spring positioning boss 44, long slot hole 45, screw 5, nut 6, hollow shaft 7, second center through hole 71, concave keyway 72, threaded section 73, adjusting nut 8, hand crank handle 9, knob screw 10, screw 101, knob end 102

[0016] The motor end cover 100 , the motor shaft 200 , the resolver stator 300 , the locking waist-shaped groove 301 , and the resolver rotor 400 . DETAILED DESCRIPTION

[0017] A motor resolver mechanical zeroing tool, see Figure 1-Figure 2 :It includes a positioning block 1, which is used to locate the step of the rotary transformer mounting hole of the motor end cover 100 for radial centering setting. A center ring 11 is arranged in the central area of ​​the positioning block 1. The center ring 11 is concave toward the outer end surface area to form a first bearing through hole 12 and a second spring positioning groove 13. A bearing 2 is arranged in the first bearing through hole 11, and a compression spring 3 is arranged in the second spring positioning groove 13. It also includes a connecting rod 4, a knob screw 10, an adjusting nut 8, a hand crank handle 9, and a hollow shaft 7. The connecting rod 4 includes a central sleeve 41 and convex rod portions 42 on both sides. A central through hole 43 with a key is arranged in the central axial direction of the central sleeve 41. The outer end of the compression spring 3 is mounted on the rear end surface of the central sleeve 41. A second central through hole 71 is arranged in the center of the hollow shaft 7. The outer circumferential length direction of the hollow shaft 7 is arranged There is a concave keyway 72, and a threaded section 73 is provided in the rear end area of ​​the hollow shaft 7. After the hollow shaft 7 is inserted into the center through hole 43, the front end is inserted and positioned in the inner ring of the bearing 2. The center hole of the hand crank handle 9 is provided with a key structure. The hand crank handle 9 is sleeved on the rear end area of ​​the hollow shaft 7 and arranged in alignment with the concave keyway 72. The adjusting nut 8 is threadedly connected and sleeved on the rear end threaded section 73 of the hollow shaft 7. After the screw 101 end of the knob screw 10 penetrates the second center through hole 71 of the hollow shaft 7, it is threadedly fixed to the center concave threaded hole of the motor shaft 200. The outer end of the side convex rod portion 42 is provided with a long slot hole 45 penetrating in the thickness direction. After the screw 5 penetrates the long slot hole 45, the inner end is inserted into the locking waist groove 301 at the corresponding position of the ring cloth of the rotary transformer stator 300, and the position of the screw 5 corresponding to the long slot hole 45 is locked by the upper and lower nuts 6.

[0018] The rear end surface of the central sleeve 41 is provided with a spring positioning boss 44, the outer end of the compression spring 3 is sleeved on the spring positioning boss 44, and is mounted on the rear end surface of the central sleeve 41 to ensure reliable and stable positioning;

[0019] A forward convex positioning ring 15 is provided at the position of the outer ring 14 of the positioning block 1 facing the step of the resolver mounting hole of the motor end cover 100, and the forward convex positioning ring is embedded in the step of the resolver mounting hole to ensure the centering arrangement;

[0020] The connection part between the center ring 11 and the outer ring 14 of the positioning block 1 is a plurality of connecting rods 16 , and the screw rods 5 are arranged to pass through the gap areas between adjacent connecting rods 16 during assembly.

[0021] A method for using a mechanical zero adjustment tool for a motor resolver, firstly matching a limit block of a resolver stator zero adjustment part with a step of a resolver mounting hole on a motor end cover, that is, at this time, the tool, the resolver and the motor shaft are ensured to be concentric, then a screw is inserted into a locking waist groove of the resolver stator, then locked, and the screwing depth of an adjusting nut on a hollow shaft is adjusted until an end face of the screw contacts a bottom face of the resolver mounting hole on the motor end cover, at which time a compression spring has a certain amount of compression in the axial direction, then a knob screw passes through the hollow shaft and is screwed into a central concave threaded hole on the motor shaft, and the preparation work is completed;

[0022] During the zeroing step, the knob screw is twisted, the motor shaft will be rotated and the reading on the resolver will change accordingly. When the reading on the resolver is close to the required resolver value, the knob screw is stopped from being twisted. Then, the hand crank is fine-tuned. Due to the effect of the keyway, the hollow shaft and the connecting rod will rotate synchronously with the hand crank. At this time, the screw is locked on the connecting rod, and the screw rotates around the hollow shaft, thereby pushing the resolver stator core to rotate circumferentially. At this time, the reading on the resolver is fine-tuned until the reading on the resolver reaches the required target value. Then, the hand crank is stopped from being fine-tuned. The position of the resolver stator is kept unchanged, and then several screws are passed through the locking waist groove on the resolver stator core and screwed into the mounting threaded holes on the motor end cover. The resolver stator is locked at this time, and this position is the target position required for resolver zeroing. After the resolver zeroing is completed, the tooling is removed and all the mounting screws of the resolver stator are installed in place.

[0023] Its working principle is as follows: by utilizing the common installation characteristics of the resolver rotor, the knob screw is matched with the central concave threaded hole on the motor shaft to rotate the motor shaft, thereby changing the angle of the resolver rotor. It is suitable for the zeroing requirements of resolvers of different specifications of different motors and is more universal. The radial position of the screw on the long slot hole can be adjusted. The screw is embedded in the locking waist groove of the resolver stator to promote the rotation of the stator. Therefore, the tooling meets the zeroing requirements of resolver stators of different sizes and specifications. By adjusting the adjusting nut to change the axial compression of the compression spring, the zeroing requirements of resolvers of different axial installation depths of different motors can be met. This makes the tooling versatile.

[0024] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0025] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A mechanical zeroing tool for a motor resolver. Features: It includes a positioning block, which is used to position the step of the rotary transformer mounting hole of the motor end cover for radial centering setting. A center ring is arranged in the central area of ​​the positioning block. The center ring is concave toward the outer end surface area to form a first bearing through hole and a second spring positioning groove. A bearing is arranged in the first bearing through hole, and a compression spring is arranged in the second spring positioning groove. It also includes a connecting rod, a knob screw, an adjusting nut, a hand crank, and a hollow shaft. The connecting rod includes a center sleeve and convex rods on both sides. A center through hole with a key is arranged in the central axial direction of the center sleeve. The outer end of the compression spring is mounted on the rear end surface of the center sleeve. A second center through hole is arranged in the center of the hollow shaft. The outer circumferential length direction of the hollow shaft A concave keyway is provided, and a threaded section is provided in the rear end area of ​​the hollow shaft. After the hollow shaft is inserted into the center through hole, the front end is inserted and positioned in the inner ring of the bearing. A key structure is provided in the center hole of the hand crank handle. The hand crank handle is sleeved on the rear end area of ​​the hollow shaft and arranged in alignment with the concave keyway. The adjusting nut is threadedly connected and sleeved on the rear end threaded section of the hollow shaft. After the screw end of the knob screw passes through the second center through hole of the hollow shaft, it is threadedly fixed to the center concave threaded hole of the motor shaft. The outer end of the side convex rod portion is provided with a long slot hole passing through the thickness direction. After the screw passes through the long slot hole, the inner end is inserted into the locking waist slot at the corresponding position of the ring cloth of the rotary transformer stator, and the position of the screw corresponding to the long slot hole is locked by upper and lower nuts.

2. A motor resolver mechanical zeroing tool as claimed in claim 1, Features: A spring positioning boss is arranged on the rear end surface of the central sleeve, and the outer end of the compression spring is sleeved on the spring positioning boss and is mounted on the rear end surface of the central sleeve.

3. A motor resolver mechanical zeroing tool as claimed in claim 1, Features: A forward convex positioning ring is provided at a position of the outer ring of the positioning block facing the step of the resolver mounting hole of the motor end cover, and the forward convex positioning ring is embedded in the step of the resolver mounting hole.

4. A motor resolver mechanical zeroing tool as claimed in claim 1, Features: The connecting parts of the central ring and the outer ring of the positioning block are a plurality of connecting rods, and the screw rods are arranged through the gap areas between adjacent connecting rods during assembly.

5. A method for using a motor resolver mechanical zeroing tool. It is characterized in that First, match the limit block of the zero adjustment part of the resolver stator with the step of the resolver mounting hole on the motor end cover, that is, at this time, the tooling, the resolver and the motor shaft are guaranteed to be concentric. Then, insert the screw into the locking waist groove of the resolver stator, and then lock it. Adjust the screwing depth of the adjusting nut on the hollow shaft until the end face of the screw contacts the bottom surface of the resolver mounting hole on the motor end cover. At this time, the compression spring will have a certain amount of compression in the axial direction. Then, the knob screw passes through the hollow shaft and is screwed into the central concave threaded hole on the motor shaft. The preparation work is completed. During the zeroing step, the knob screw is twisted, the motor shaft will be rotated and the reading on the resolver will change accordingly. When the reading on the resolver is close to the required resolver value, the knob screw is stopped from being twisted. Then, the hand crank is fine-tuned. Due to the effect of the keyway, the hollow shaft and the connecting rod will rotate synchronously with the hand crank. At this time, the screw is locked on the connecting rod, and the screw rotates around the hollow shaft, thereby pushing the resolver stator core to rotate circumferentially. At this time, the reading on the resolver is fine-tuned until the reading on the resolver reaches the required target value. Then, the hand crank is stopped from being fine-tuned. The position of the resolver stator is kept unchanged, and then several screws are passed through the locking waist groove on the resolver stator core and screwed into the mounting threaded holes on the motor end cover. The resolver stator is locked at this time, and this position is the target position required for resolver zeroing. After the resolver zeroing is completed, the tooling is removed and all the mounting screws of the resolver stator are installed in place.

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