A quick-release encoder docking device for a permanent magnet synchronous motor

Abstract

This utility model relates to a quick-release encoder docking device for a permanent magnet synchronous motor. A motor drive shaft sleeve is horizontally inserted into the interior of a hollow tube. A detection shaft is connected to the side of the encoder body and slidably inserted into the motor drive shaft sleeve. A fixing tube is fixedly sleeved on one side of the hollow tube. This utility model allows for quick connection of the motor drive shaft sleeve and the detection shaft by simply rotating the rotating tube clockwise. This allows a limiting rod to pass through the first and second insertion holes, enabling rapid connection of the motor drive shaft sleeve and the detection shaft. Simultaneously, by rotating the rotating tube counterclockwise, the operator can move the limiting rod out of the first and second insertion holes, quickly separating the motor drive shaft sleeve and the detection shaft. This achieves rapid separation of the encoder body and the permanent magnet synchronous motor, improving disassembly and assembly efficiency.

Description

Technical Field

[0001] This utility model relates to the field of encoder docking technology, specifically a quick-release encoder docking device for a permanent magnet synchronous motor. Background Technology

[0002] An encoder is a device that encodes signals (such as bit streams) or data and converts them into a signal form that can be used for communication, transmission, and storage. In order to achieve high-precision motion control in modern electromechanical systems, encoders are often combined with permanent magnet synchronous motors. The encoder is directly connected to the end drive shaft of the motor, and zero-backlash transmission is achieved through a mechanical coaxial structure to ensure that the position feedback signal is synchronized with the position of the motor rotor in real time.

[0003] In practical applications, to ensure a stable connection between the encoder detection end and the motor drive shaft, vertical connection holes are often drilled inside both the encoder detection end and the motor drive shaft. Bolts are then inserted vertically, and the connection is achieved through the insertion force provided by the bolts. However, this connection method is limited by the small overall size of the detection end and the motor drive shaft, resulting in the need for smaller bolts. Consequently, operators must accurately locate the bolts and nuts for tightening and loosening, as well as for subsequent disassembly and separation. This presents a challenge for overall assembly and disassembly, and the entire process is time-consuming, impacting the efficiency of assembling and disassembling the encoder and permanent magnet synchronous motor. Therefore, a new technical solution is needed to address this issue. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies, adapt to practical needs, and provide a quick-release encoder docking device for permanent magnet synchronous motors. This addresses the current practice of vertically opening connection holes inside the encoder detection end and motor drive shaft to ensure stable connection between them. Bolts are then vertically inserted, and the connection is achieved through the insertion force provided by the bolts. However, this connection method is limited by the small overall size of the detection end and motor drive shaft, resulting in smaller bolt sizes. Consequently, operators need to accurately locate the bolts and nuts for tightening and loosening, as well as for subsequent disassembly and separation. This presents a certain degree of difficulty in overall assembly and disassembly, and the overall operation process is time-consuming, affecting the efficiency of assembling and disassembling the encoder and permanent magnet synchronous motor.

[0005] To achieve the purpose of this utility model, the technical solution adopted by this utility model is as follows: a quick-release encoder docking device for a permanent magnet synchronous motor is designed, wherein a motor drive shaft sleeve is horizontally inserted inside the hollow tube, and a detection shaft is connected to the side of the encoder body, and the detection shaft is slidably inserted into the inside of the motor drive shaft sleeve.

[0006] A fixed tube is fixedly sleeved on one side of the hollow tube, and a rotating tube is rotatably sleeved on the other side of the hollow tube. Both the fixed tube and the rotating tube are open on the side, so that the interiors of the fixed tube and the rotating tube are kept in communication. An insertion limiting mechanism is provided inside the hollow tube, and the insertion limiting mechanism is connected to the rotating tube in a driving connection.

[0007] The fixed tube is equipped with a one-way rotation mechanism, and the one-way rotation mechanism and the insertion limiting mechanism are connected in a transmission manner.

[0008] Preferably, the insertion limiting mechanism includes a transmission gear ring, a transmission gear, and a follower rack. The transmission gear ring is rotatably and fixedly installed at the middle of the inner side of the hollow tube. Rotating rods are rotatably installed on the four sides of the inner side of the hollow tube through bearings. A transmission gear is fixedly sleeved on the outer side of the middle end of each rotating rod. A movable groove is opened on the outer side of the end of the hollow tube near the motor transmission shaft sleeve, and there are four sets of movable grooves. A follower rack is slidably inserted through the inner wall of each movable groove.

[0009] Preferably, a guide groove is provided on the outer side of the hollow tube near the encoder body, and there are four sets of guide grooves, with a transmission block slidably inserted through each guide groove.

[0010] Preferably, a connecting frame is fixedly installed on the outer side of each of the following racks, and a limit plug is fixedly installed through each of the connecting frames. Four sets of first insertion holes are equidistantly opened on the outer side of the motor drive shaft sleeve, and four sets of second insertion holes are equidistantly opened on the outer side of the detection shaft.

[0011] Preferably, the unidirectional rotation mechanism includes a limiting pawl and a limiting ratchet. A connecting circular frame is fixedly installed inside the rotating tube, and the top edge of the transmission block is connected to the inner side wall of the connecting circular frame. Several sets of limiting ratchets are fixedly installed at equal intervals on the outer side wall of the connecting circular frame.

[0012] Preferably, a transmission rod is rotatably mounted on the inner side of the rotating tube via a bearing, a limiting pawl is fixedly sleeved on the outer side of the transmission rod, a return torsion spring is movably sleeved on the outer side of the transmission rod, and a push plate is fixedly mounted on the top side of the transmission rod.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This utility model features a rotating tube rotatably sleeved on the outside of a hollow tube, and a connecting frame fixedly installed inside the rotating tube. A transmission block connects the rotating tube to a transmission gear ring located inside the hollow tube. This allows for easy connection between the motor drive shaft sleeve and the detection shaft when necessary. Simply turning the rotating tube clockwise causes the transmission gear ring to rotate within the hollow tube under the transmission action of the transmission block. The meshing of the transmission gear ring and the transmission gear simultaneously drives the transmission gear to rotate within the hollow tube. Finally, the meshing of the transmission gear and the follower racks drives four sets of follower racks to rotate simultaneously. As the rotating tube is turned, the two sides move synchronously inside the hollow tube, which in turn provides a limit rod that moves synchronously from the four sides inside the hollow tube. This allows the limit rod to pass through the four sides of the motor drive shaft sleeve and the detection shaft into the first and second insertion holes. This allows for a quick connection between the motor drive shaft sleeve and the detection shaft. Simultaneously, the operator can rotate the rotating tube counterclockwise to move the limit rod out of the first and second insertion holes, quickly separating the motor drive shaft sleeve and the detection shaft. This enables rapid separation of the encoder body and the permanent magnet synchronous motor, improving disassembly and assembly efficiency.

[0015] 2. This utility model connects the rotating tube, connecting frame, and transmission gear ring via a transmission block. When the rotating tube is turned, the rotating tube and connecting frame rotate synchronously. This, in turn, causes the limiting ratchet on the outside of the connecting frame to rotate synchronously inside the rotating tube. The interaction between the limiting ratchet and the limiting pawl causes the limiting pawl to be resisted by the outer arc surface of the limiting ratchet as it rotates. This, in turn, causes the limiting pawl and transmission rod to rotate synchronously between the rotating tube and the fixed tube, thus affecting the return torsion spring. While the ratchet is being turned to provide a restoring torque, the pawl rotates and moves to the outside of the adjacent ratchet. Under the torque provided by the return torsion spring, the ratchet is driven to return to its original position, causing the pawl to re-engage inside the ratchet. Combined with the ratchet's resistance to the pawl, the rotating tube can only rotate clockwise and cannot rotate counterclockwise arbitrarily. This ensures that the limiting rod can be stably inserted into the motor drive shaft sleeve and the detection shaft without arbitrarily moving out and affecting the connection and transmission stability of the motor drive shaft sleeve and the detection shaft. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0017] Figure 2 This is a schematic diagram of the internal structure of the hollow tube of this utility model;

[0018] Figure 3 This is a schematic diagram of the external structure of the hollow tube of this utility model;

[0019] Figure 4 This is a schematic diagram of the internal structure of the rotating tube of this utility model;

[0020] In the diagram: 1. Hollow tube; 11. Motor drive shaft sleeve; 12. Encoder body; 13. Detection shaft; 14. First insertion hole; 15. Second insertion hole;

[0021] 2. Rotating rod; 21. Transmission gear; 22. Movable groove; 23. Follower rack; 24. Connecting frame; 25. Limiting rod; 26. Transmission gear ring; 27. Rotating tube; 28. Transmission block; 29. ​​Connecting circular frame;

[0022] 3. Fixed tube; 31. Transmission rod; 32. Limiting pawl; 33. Limiting ratchet; 34. Return torsion spring; 35. Hand push plate;

[0023] 4. Guide groove. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0025] Example 1: A quick-release encoder docking device for a permanent magnet synchronous motor, see [link / reference] Figures 1 to 4 A motor drive shaft sleeve 11 is horizontally inserted inside the hollow tube 1. A detection shaft 13 is connected to the side of the encoder body 12 and is slidably inserted into the motor drive shaft sleeve 11. Four sets of first insertion holes 14 are equidistantly opened on the outer side of the motor drive shaft sleeve 11, and four sets of second insertion holes 15 are equidistantly opened on the outer side of the detection shaft 13. The inner diameter of the first insertion hole 14 and the second insertion hole 15 is the same as the diameter of the limiting rod 25.

[0026] When it is necessary to connect the motor drive shaft sleeve 11 and the detection shaft 13, the motor drive shaft sleeve 11 is pushed from the left side of the hollow tube 1 and inserted into the hollow tube 1. Then, the detection shaft 13 is pushed from the right side of the hollow tube 1 and inserted into the motor drive shaft sleeve 11. The detection shaft 13 and the motor drive shaft sleeve 11 are then twisted so that the first insertion hole 14 on the outside of the motor drive shaft sleeve 11 and the second insertion hole 15 on the outside of the detection shaft 13 overlap. This allows the limiting rod 25 to pass through the first insertion hole 14 and be inserted into the second insertion hole 15, thereby achieving the transmission connection between the detection shaft 13 and the motor drive shaft sleeve 11.

[0027] For details, see Figures 1 to 4A transmission gear ring 26 is rotatably and fixedly installed at the middle of the inner side of the hollow tube 1. Rotating rods 2 are rotatably installed on the four sides of the inner side of the hollow tube 1 through bearings. A transmission gear 21 is fixedly sleeved on the outer side of the middle end of each rotating rod 2. A movable groove 22 is opened on the outer side of the end of the hollow tube 1 near the motor drive shaft sleeve 11. There are four sets of movable grooves 22. A follower rack 23 is slidably inserted through the inner wall of each movable groove 22. The follower rack 23 and the outer side of the transmission gear 21 mesh with one end, and the transmission gear ring 26 and the outer side of the transmission gear 21 mesh with the other end. A connecting frame 24 is fixedly installed on the outer side of each follower rack 23. A limit plug 25 is fixedly installed through the inside of each connecting frame 24.

[0028] A guide groove 4 is provided on the outer side of the hollow tube 1 near the encoder body 12, and there are four sets of guide grooves 4. A transmission block 28 is slidably inserted into each guide groove 4, and the transmission block 28 extends through and into the rotating tube 27.

[0029] After placing the motor drive shaft sleeve 11 and the detection shaft 13 on the inner wall of the hollow tube 1, the rotating tube 27 is turned clockwise. Under the connecting transmission action of the transmission block 28, and with the guiding sliding action of the guide groove 4 on the transmission block 28, the transmission block 28, guided by the guide groove 4, synchronously drives the connecting circular frame 29 and the transmission gear ring 26 to rotate. This, combined with the synchronous driving of the transmission gear 21 to rotate synchronously inside the hollow tube 1, and the meshing transmission action of the transmission gear 21 and the follower rack 23, and the guiding sliding action of the guide groove 4 on the follower rack 23, can drive four sets of follower racks 2... 3. As the rotating tube 27 is rotated, it moves synchronously towards each other inside the hollow tube 1, thereby providing the limiting rod 25 with synchronous movement towards each other from the four sides inside the hollow tube 1. This allows the limiting rod 25 to pass through the four sides outside the motor drive shaft sleeve 11 and the detection rod 13 into the first insertion hole 14 and the second insertion hole 15, until the limiting rod 25 passes through the first insertion hole 14 and is inserted into the second insertion hole 15. Under the locking and limiting action of the limiting rod 25, the motor drive shaft sleeve 11 and the detection rod 13 can be connected for transmission, so that the encoder body 12 can detect the rotation of the motor drive shaft sleeve 11 through the detection rod 13.

[0030] Further, see Figures 1 to 4The one-way rotation mechanism includes a limiting pawl 32 and a limiting ratchet 33. A connecting circular frame 29 is fixedly installed inside the rotating tube 27, and the top of the side of the transmission block 28 is connected to the inner wall of the connecting circular frame 29. Several sets of limiting ratchet 33 are fixedly installed at equal intervals on the outer wall of the connecting circular frame 29. A transmission rod 31 is rotatably installed inside the rotating tube 27 through a bearing. The side of the transmission rod 31 extends to the outside of the fixed tube 3 through the outer wall of the fixed tube 3 through a bearing. The limiting pawl 32 is fixedly sleeved on the outside of the transmission rod 31, and the side end of the limiting pawl 32 is inserted into the inside of the limiting ratchet 33. A return torsion spring 34 is movably sleeved on the outside of the transmission rod 31, and the return torsion spring 34 is located inside the fixed tube 3.

[0031] When the rotating tube 27 is turned clockwise, the limiting ratchet 33 connected to the outer side of the circular frame 29 rotates synchronously inside the rotating tube 27. Combined with the interaction between the limiting ratchet 33 and the limiting pawl 32, the limiting pawl 32, due to the rotation of the limiting ratchet 33, is abutted by the outer arc surface of the limiting ratchet 33. This causes the limiting pawl 32 and the transmission rod 31 to rotate synchronously between the rotating tube 27 and the fixed tube 3, causing the reset torsion spring 34 to twist and provide a restoring torque. Simultaneously, the limiting pawl 3... 2. After rotating and moving to the outside of the adjacent limiting ratchet 33, the limiting ratchet 33 is driven to return to its original position under the torsional force provided by the reset torsion spring 34. This allows the limiting pawl 32 to re-engage inside the limiting ratchet 33. Under the abutment of the limiting ratchet 33 against the limiting pawl 32, the limiting ratchet 33 will not rotate counterclockwise arbitrarily. This ensures that the limiting rod 25 can be stably inserted into the first insertion hole 14 and the second insertion hole 15, thereby ensuring the stability of the transmission connection between the motor drive shaft sleeve 11 and the detection shaft 13.

[0032] It is worth noting that, see Figures 1 to 4 A push plate 35 is fixedly installed on the top side of the transmission rod 31, and the push plate 35 is movably disposed on the outside of the fixed tube 3.

[0033] After testing the permanent magnet synchronous motor, when it is necessary to separate the testing shaft 13 and the motor drive shaft sleeve 11, the push plate 35 can be pushed to drive the transmission rod 31 to rotate synchronously. This will cause the transmission rod 31 and the limiting pawl 32 to rotate synchronously, so that the limiting pawl 32 can be completely removed from the outside of the limiting ratchet 33. That is, the limiting pawl 32 loses its abutting and limiting force on the limiting ratchet 33. Then, the rotating tube 27 can be turned counterclockwise to repeat the above transmission steps. This will drive the limiting plug 25 to move synchronously out of the first insertion hole 14 and the second insertion hole 15. Then, the motor drive shaft sleeve 11 and the testing shaft 13 can be pulled out to separate them, thus completing the disassembly and separation of the encoder body 12 and the permanent magnet synchronous motor.

[0034] In addition, all components designed in this utility model are general standard parts or components known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods. Those skilled in the art can fully implement them, so there is no need to elaborate. The content protected by this utility model does not involve improvements to the internal structure and method.

[0035] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.

Claims

1. A quick release encoder docking device for permanent magnet synchronous electric machines, comprising a hollow tube (1) and an encoder body (12), characterized in that, The hollow tube (1) is laterally inserted with a motor drive shaft sleeve (11), and the encoder body (12) is connected to a detection shaft (13) on its side, and the detection shaft (13) is slidably inserted into the motor drive shaft sleeve (11). A fixed tube (3) is fixedly sleeved on one side of the hollow tube (1), and a rotating tube (27) is rotatably sleeved on the other side of the hollow tube (1). The fixed tube (3) and the rotating tube (27) are both open, so that the fixed tube (3) and the rotating tube (27) are kept in communication. An insertion limiting mechanism is provided inside the hollow tube (1), and the insertion limiting mechanism and the rotating tube (27) are connected in a transmission manner. The fixed tube (3) is equipped with a one-way rotation mechanism inside, and the one-way rotation mechanism and the insertion limiting mechanism are connected in a transmission manner.

2. The quick release encoder docking device for permanent magnet synchronous motor of claim 1, wherein, The insertion limiting mechanism includes a transmission gear ring (26), a transmission gear (21), and a follower rack (23). The transmission gear ring (26) is rotatably fixedly installed at the middle of the inner side of the hollow tube (1). Rotating rods (2) are rotatably installed on the four sides of the inner side of the hollow tube (1) through bearings. The transmission gear (21) is fixedly sleeved on the outer side of the middle end of each rotating rod (2). A movable groove (22) is opened on the outer side of the end of the hollow tube (1) near the motor drive shaft sleeve (11), and there are four sets of movable grooves (22). The follower rack (23) is slidably inserted through the inner wall of each movable groove (22).

3. The quick release encoder docking device for permanent magnet synchronous electric machines of claim 2, wherein, The hollow tube (1) has a guide groove (4) at one end near the encoder body (12) on the outside. There are four sets of guide grooves (4), and a transmission block (28) is slidably inserted into each guide groove (4).

4. The quick release encoder docking device for permanent magnet synchronous motor of claim 2, wherein, Each of the following racks (23) is fixedly installed with a connecting frame (24) on the outside. Each of the connecting frames (24) is fixedly installed with a limit plug (25) through it. The motor drive shaft sleeve (11) is provided with four sets of first plug holes (14) at equal intervals on the outside. The detection shaft (13) is provided with four sets of second plug holes (15) at equal intervals on the outside.

5. The quick release encoder docking device for permanent magnet synchronous motor of claim 3, wherein, The unidirectional rotation mechanism includes a limiting pawl (32) and a limiting ratchet (33). A connecting circular frame (29) is fixedly installed inside the rotating tube (27), and the top of the side of the transmission block (28) is connected to the inner side wall of the connecting circular frame (29). Several sets of limiting ratchet (33) are fixedly installed at equal intervals on the outer side wall of the connecting circular frame (29).

6. The quick release encoder docking device for permanent magnet synchronous electric machines of claim 5, wherein, The inner side of the rotating tube (27) is rotatably mounted with a transmission rod (31) via a bearing. The outer side of the transmission rod (31) is fixedly sleeved with a limiting pawl (32). The outer side of the transmission rod (31) is movably sleeved with a reset torsion spring (34). The top side of the transmission rod (31) is fixedly mounted with a push plate (35).

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