Motor tail end detection electric connection assembly containing detachable vulnerable module and coreless motor

Abstract

The utility model discloses a motor tail end detection electric connection assembly containing a detachable vulnerable module. The motor tail end detection electric connection assembly comprises a rear cover, the detachable vulnerable module, a plugging module and a tail cover. The rear cover comprises an annular cover body defining a containing cavity, a partition plate dividing the containing cavity into an upper containing hole and a lower containing hole is arranged in the containing cavity, and a Hall head insertion hole and a rotating shaft mounting hole are formed in the partition plate; the tail cover comprises a containing groove hole penetrating through the tail cover, the upper portion of the tail cover is detachably connected with the lower portion of the annular cover body, and the containing groove hole is communicated with the lower containing hole. The detachable vulnerable module comprises a Hall PCB, and a sensor and a pin which are respectively fixed on the upper side surface and the lower side surface of the Hall PCB. The utility model also comprises a coreless motor. Compared with the prior art, the coreless motor provided by the utility model comprises the motor tail end detection electric connection assembly comprising the detachable vulnerable module, and the Hall PCB, the sensor and the contact pin are used as the detachable vulnerable module, so that the coreless motor can be integrally detached and replaced, the maintenance time is reduced, and the cost of the motor is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of hollow cup motor technology, and particularly relates to a motor tail end detection electrical connection component with a detachable and easily damaged module and a hollow cup motor. Background Technology

[0002] Coreless motors, with their unique hollow cup-shaped armature structure, occupy an important position in modern industry and electronic equipment. Due to their coreless design, they possess a number of significant advantages. First, their extremely low moment of inertia allows coreless motors to respond quickly to control signals, enabling rapid start-up, stopping, and frequent forward / reverse switching, making them outstanding in scenarios with high dynamic response requirements, such as drone flight control systems and industrial robot joint drives. Second, the low electromagnetic interference characteristics resulting from the coreless design make them indispensable in fields with stringent electromagnetic compatibility requirements, such as medical equipment and precision testing instruments. In current coreless motor technology, Hall effect sensors are typically used to detect the rotor position and precisely regulate parameters such as motor speed and direction to achieve accurate motor control.

[0003] In the prior art, the hollow cup motor is an integral structure in which the Hall sensor cannot be removed. Specifically, the hollow cup motor includes a motor housing, which includes a main housing and a shell end sleeve glued or welded to the main housing. The main housing and the shell end sleeve together form a Hall mounting cavity. The Hall plate is fixedly installed inside the motor housing, and the Hall sensor is installed on the Hall plate, with the Hall sensor located in the Hall mounting cavity.

[0004] The drawback of existing technology lies in its structure. With the main housing and end sleeve integrated into a single unit, the Hall sensor is built-in. If the Hall sensor malfunctions, it is extremely difficult to remove it from the motor housing for individual replacement. Repair personnel often need to spend considerable time and effort attempting disassembly, and even then, the complexity of the structure may prevent success. For smaller diameter (e.g., approximately 16mm outer diameter) hollow cup motors used in medical applications to drive scalpels, opening the motor housing is even more challenging. In most cases, due to the inability to replace the damaged Hall sensor, the entire motor must be scrapped. This results in significant resource waste and a substantial increase in the motor's operating costs.

[0005] Therefore, it is necessary to provide a new motor tail end detection electrical connection assembly with a detachable and easily damaged module and a coreless motor to solve the above-mentioned technical problems. Summary of the Invention

[0006] (a) Technical problems to be solved

[0007] Based on this, the present invention provides a motor tail-end detection electrical connection assembly with a detachable and easily damaged module and a coreless motor, aiming to solve the technical problems of high motor operating costs, short lifespan, and resource waste caused by the difficulty or inability to replace the Hall sensor in existing coreless motors.

[0008] (II) Technical Solution

[0009] To solve the above-mentioned technical problems, this utility model proposes a motor tail-end detection electrical connection assembly with a detachable and easily damaged module, comprising: a rear cover, a detachable and easily damaged module, a plug-in module, and a tail cover; the rear cover includes an annular cover body forming a receiving cavity, and a partition plate is fixedly provided inside the receiving cavity to divide the receiving cavity into an upper receiving hole and a lower receiving hole, the partition plate having a Hall head insertion hole and a shaft mounting hole passing through it; the tail cover includes a receiving groove hole passing through it, the upper part of the tail cover and the lower part of the annular cover body are detachably connected, and the receiving groove hole communicates with the lower receiving hole; the detachable and easily damaged module includes: a Hall PCB board and a plug-in module respectively fixed to the lower receiving hole. The sensor and pin are located on the upper and lower sides of the Hall PCB board, and both the Hall PCB board and the pin are located in the lower receiving hole. The sensor extends into the upper receiving hole through the Hall head insertion hole. The Hall PCB board has a through-hole for wires. The plug-in module includes: a wire clip, a plug-in PCB board, and a pin holder fixed to the plug-in PCB board. The plug-in PCB board is located in the receiving slot. The wire clip is partially or entirely located in the receiving slot, and the upper part of the wire clip is fixedly connected to the plug-in PCB board. The lower part of the pin is movably inserted into the pin holder to realize the electrical connection between the pin and the pin holder.

[0010] Preferably, the motor tail end detection electrical connection assembly containing the detachable and easily damaged module further includes a sealing isolation cover plate disposed in the lower receiving hole. The outer side wall of the sealing isolation cover plate abuts against the inner side wall of the rear cover. The sealing isolation cover plate is located between the Hall PCB board and the plug-in PCB board. The sealing isolation cover plate is provided with a pin through hole through it. The pin passes through the pin through hole, and the outer wall of the pin is in contact with the inner wall of the pin through hole.

[0011] Preferably, the sealing isolation cover is made of rubber material, and a plurality of tool insertion slots for inserting disassembly tools are provided between the sealing isolation cover and the rear cover; the plurality of tool insertion slots are spaced apart; and the tool insertion slots have a tapered structure along the direction of insertion of the disassembly tools.

[0012] Preferably, the side of the Hall PCB board near the wire clip is the circuit layout surface; the outer side of the Hall PCB board is provided with a raised Hall plate positioning wall, and the side wall of the lower receiving hole is provided with a recessed Hall plate positioning notch, and the Hall plate positioning wall is inserted into the Hall plate positioning notch; the Hall PCB board is generally circular, the wire through hole is an oblong hole, the number of the wire through holes is 3, and the 3 wire through holes are evenly arranged around the center of the wire through hole.

[0013] Preferably, the plug-in PCB board has a through-hole, one end of the pin holder away from the detachable and vulnerable module is fixedly inserted into the through-hole, the other end of the pin holder near the detachable and vulnerable module has a recessed insertion hole, the Hall PCB board has a through-hole, one end of the pin is fixedly inserted into the pin hole, and the other end of the pin is inserted into the insertion hole.

[0014] Preferably, the insertion hole is a blind hole, the bottom surface of the insertion hole is a pin limiting surface, the upper part of the Hall PCB board abuts against the lower part of the partition, the upper outer periphery of the sealing isolation cover is provided with a protruding cover support ring, the upper part of the cover support ring abuts against the lower part of the Hall PCB board, and the lower part of the insertion pin abuts against the pin limiting surface.

[0015] Preferably, the wire buckle includes a connecting piece and a wire-fastening ring fixedly connected vertically; the connecting piece is generally circular, the wire-fastening ring is generally circular, and the interior of the connecting piece is connected to the interior of the wire-fastening ring; the lower circumference of the wire-fastening ring is provided with multiple expansion joints; the lower part of the wire-fastening ring extends out of the tail cap; the wire buckle also includes multiple connecting supports evenly arranged around the center of the connecting piece and fixed to the top of the connecting piece; the outer side of the connecting support is provided with a raised support boss, and a support step is formed between the outer and inner sides of the connecting support; the outer side of the plug-in PCB board is provided with a recessed support notch, the shape of the support notch matches the shape of the support boss, the support boss is inserted into the support notch, and the support step supports the bottom of the connecting piece; the support boss is fixedly connected to the connecting piece.

[0016] Preferably, the annular cover has an external thread on the outer side near the lower receiving hole; the upper inner side of the tail cover has an internal thread that mates with the external thread; and the annular cover has a locking structure on the outer side near the lower receiving hole.

[0017] This utility model also proposes a hollow cup motor, including a motor body module and a motor tail end detection electrical connection assembly with a detachable and easily damaged module as described above. The motor tail end detection electrical connection assembly with the detachable and easily damaged module is installed at the lower part of the motor body module. The motor body module includes a rotating shaft, and a rotor assembly, a stator assembly, and a housing, which are sequentially fitted around the rotating shaft from the inside out. The rotor assembly includes a spool with a wire end connected to it. The wire end passes through the wire hole and is soldered to the circuit layout surface. The inner wall of the housing is provided with a groove that cooperates with the anti-reverse locking structure, and the anti-reverse locking structure is engaged in the groove. A bearing is provided in the upper receiving hole, and the lower part of the rotating shaft is inserted into the bearing.

[0018] Preferably, the motor body module further includes a front cover threadedly connected to the upper part of the housing; the hollow cup motor further includes a reducer module mounted on the upper part of the motor body module; the rotor assembly has an upper balance block and a lower balance block at both ends; the sensor is a Hall sensor; and the Hall PCB board integrates three-phase wire pads and a Hall circuit board.

[0019] (III) Beneficial Effects

[0020] Compared with the prior art, the hollow cup motor of this utility model includes a motor tail end detection electrical connection assembly with a detachable and easily damaged module. The Hall PCB board, sensor and pin are integrated into a detachable and easily damaged module. If the sensor is damaged, it can be completely removed and replaced, which greatly reduces maintenance time and improves maintenance convenience; it also greatly reduces the motor's operating cost and increases the motor's service life. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of the hollow cup motor of this utility model;

[0023] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0024] Figure 3 This is an exploded view of the motor tail end detection electrical connection assembly containing a detachable and easily damaged module according to this utility model.

[0025] Figure 4A three-dimensional schematic diagram of a portion of the electrical connection assembly for detecting the tail end of a motor, which includes a detachable and easily damaged module, according to this utility model.

[0026] Figure 5 This is an exploded view of the plug-in module in the motor tail end detection electrical connection assembly containing a detachable and easily damaged module of this utility model.

[0027] Explanation of reference numerals in the attached figures:

[0028] 100. Hollow cup motor;

[0029] 01. Motor tail end detection electrical connection assembly including a detachable and easily damaged module; 02. Motor main body module;

[0030] 1. Rear cover; 2. Removable and vulnerable module; 3. Plug-in module; 4. Tail cover; 5. Sealing isolation cover; 6. Tool insertion slot; 7. Shaft; 8. Rotor assembly; 9. Stator assembly; 10. Housing; 11. Bearing; 12. Front cover; 13. Reducer module; 14. Upper balance weight; 15. Lower balance weight;

[0031] 11. Annular cover; 12. Partition; 13. Upper receiving hole; 14. Lower receiving hole; 15. Hall plate positioning notch;

[0032] 21. Hall effect PCB board; 22. Sensor; 23. Pin;

[0033] 31. Wire clip; 32. PCB board for plugging and unplugging; 33. Pin socket;

[0034] 41. Receiving slot; 42. Internal thread of the cover;

[0035] 51. Needle through hole; 52. Cap support ring;

[0036] 81. Thread spool;

[0037] 101. Card slot;

[0038] 111. External thread on the cover; 112. Anti-reverse snap-fit ​​structure;

[0039] 121. Hall head insertion hole; 122. Shaft mounting hole;

[0040] 211. Wiring hole; 212. Circuit layout surface; 213. Hall plate positioning wall; 214. Pinhole;

[0041] 311. Connecting piece; 312. Wire clip; 313. Connecting bracket;

[0042] 321. Support notch; 322. Seat hole;

[0043] 331. Socket;

[0044] 3311, Needle limiting surface;

[0045] 3121. Tightening seam;

[0046] 3131, Supporting boss; 3132, Supporting step. Detailed Implementation

[0047] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0048] To more clearly demonstrate the technical solution and structural features of this utility model, the following detailed description of this utility model is provided in conjunction with Figures 1-5.

[0049] This utility model discloses a motor tail end detection electrical connection assembly 01 with a detachable and easily damaged module, including: a rear cover 1, a detachable and easily damaged module 2, a plug-in module 3, and a tail cover 4; the rear cover 1 includes an annular cover 11 and a receiving cavity disposed within the annular cover 11, and a partition 12 is fixedly disposed within the receiving cavity, dividing the receiving cavity into an upper receiving hole 13 and a lower receiving hole 14, and the partition 12 is provided with a Hall head insertion hole 121 and a shaft mounting hole 122 passing through it; the tail cover 4 includes a receiving slot 41 passing through it, the upper part of the tail cover 4 and the lower part of the annular cover 11 are detachably connected, and the receiving slot 41 communicates with the lower receiving hole 14; the detachable and easily damaged module 2 includes: a Hall PCB board 21 and a plug-in module 3 respectively fixed to... The Hall PCB board 21 has sensors 22 and pins 23 on its upper and lower sides, and both the Hall PCB board 21 and the pins 23 are located in the lower receiving hole 14. The sensor 22 extends into the upper receiving hole 13 through the Hall head insertion hole 121. The Hall PCB board 21 has a through wire hole 211. The plug-in module 3 includes: a wire clip 31, a plug-in PCB board 32 and a pin seat 33 fixed on the plug-in PCB board 32. The plug-in PCB board 32 is located in the receiving slot 41. The wire clip 31 is partially or entirely located in the receiving slot 41, and the upper part of the wire clip 31 is fixedly connected to the plug-in PCB board 32. The lower part of the pin 23 is movably inserted into the pin seat 33 to realize the electrical connection between the pin 23 and the pin seat 33.

[0050] The motor tail-end detection electrical connection assembly 01 of this utility model, which includes a detachable and easily damaged module, is connected to the tail end of the hollow cup motor 100. It includes a sensor 22, enabling functions such as speed detection, position detection, and torque control. It can also be connected to a power cord (not shown) to supply power to the motor.

[0051] In use, the upper part of the rear cover 1 is connected to the lower end of the motor housing, specifically by snap-fit, threaded connection, or insertion followed by welding. The upper receiving hole 13 is used to receive the bearing 011, and the motor shaft 7 is inserted into the bearing 011. This structure provides flexible rotational support for the lower part of the motor shaft 7. The sensor 22 is located on the outside of the shaft 7 and can detect parameters such as motor speed and shaft 7 position.

[0052] The power supply path of this utility model is as follows: one end of the power cord (not shown in the figure) is electrically connected to the pin holder 33, and the other end of the power cord passes through the wire buckle 31 and extends out of the tail cover 4 to connect to the power source. The wire buckle 31 is used to fasten the power cord to ensure the reliability of the connection between the power cord and the pin holder 33. The wire end (not shown in the figure) in the spool 81 passes through the Hall head insertion hole 121 and the wire through hole 211 in sequence and is electrically connected to the upper part of the pin 23. More specifically, a circuit can be set on the Hall PCB board 21, and the wire end (not shown in the figure) is soldered to the circuit, and the upper part of the pin 23 is connected to the circuit. After the pin 23 and the pin holder 33 are inserted, the pin 23 and the pin holder 33 are electrically connected, thus connecting the external power source to the spool 81.

[0053] The following details the process of repairing and replacing sensor 22 after it malfunctions.

[0054] The steps for removing the detachable and easily damaged module 2 are as follows.

[0055] Step 1: Unscrew the tail cap at the bottom 4.

[0056] Step 2: Pull the plug-in module 3 downwards as a whole, and the pin socket 33 and the pin 23 will be separated.

[0057] Step 3: Use a high-temperature soldering pen to detach the wire end from the circuit. It should be noted that this step is used to disconnect the wire end from the Hall PCB board 21 to ensure that the spool 81 is not damaged when the removable and fragile module 2 is pulled out.

[0058] Step 4: Pull out the damaged, easily detachable module 2 as a whole.

[0059] Installation steps of the detachable and vulnerable module 2: Take the detachable and vulnerable module 2, solder the wire end of the spool 81 to the preset position of the Hall PCB board 21, install the detachable and vulnerable module 2 as a whole, insert the plug-in module 3 into the original position, ensure that it is installed in the original position, and plug in the pin 23 and the pin seat 33; then screw the tail cover 4 onto the back cover 1.

[0060] Compared with the prior art, the beneficial effects of the motor tail end detection electrical connection assembly with detachable and easily damaged module of this utility model are as follows:

[0061] (1) If sensor 22 is damaged and cannot work properly, it can be repaired and replaced. When used in a motor, it can greatly reduce the cost of using the motor and improve the service life of the motor.

[0062] (2) The Hall PCB board 21, sensor 22 and pin 23 are integrated into a detachable and easily damaged module 2, which can be removed and replaced as a whole. This makes disassembly and assembly convenient and greatly reduces maintenance time.

[0063] It should be noted that the "up" and "down" directions in this embodiment are for reference only. Figure 1 The directions shown, using the directional terms "upper" and "lower," are for clearly describing the solution of this utility model and should not be construed as limiting the scope of protection of this utility model. When the placement of the motor tail end detection electrical connection assembly 01 containing the detachable and easily damaged module of this utility model is changed, its "upper" and "lower" directions will be changed accordingly.

[0064] According to a specific embodiment of the present invention, the motor tail end detection electrical connection assembly 01 containing a detachable and easily damaged module further includes a sealing isolation cover plate 5 disposed in the lower receiving hole 14. The outer side wall of the sealing isolation cover plate 5 abuts against the inner side wall of the rear cover 1. The sealing isolation cover plate 5 is located between the Hall PCB board 21 and the plug-in PCB board 32. The sealing isolation cover plate 5 is provided with a pin through hole 51 through it. The pin 23 passes through the pin through hole 51, and the outer wall of the pin 23 is in contact with the inner wall of the pin through hole 51.

[0065] In this embodiment, the sealing isolation cover 5 mainly serves an isolation function, forming a relatively sealed cavity on its upper part to prevent external debris from entering the motor. The shape of the needle through hole 51 matches that of the pin 23, and the pin 23 can block the needle through hole 51 after passing through, without affecting the isolation effect of the sealing isolation cover 5.

[0066] According to a specific embodiment of this utility model, the sealing isolation cover 5 is made of rubber material, and a plurality of tool insertion slots 6 for inserting disassembly and assembly tools are provided between the sealing isolation cover 5 and the rear cover 1; the plurality of tool insertion slots 6 are spaced apart; along the direction of insertion of the disassembly and assembly tools ( Figure 4 (The direction indicated by the hollow arrow) indicates that the tool is inserted into the tapered structure of slit 6.

[0067] More specifically, multiple tools were inserted into seam 6 evenly.

[0068] The tool insertion slot 6 has a tapered structure, specifically: the width of the tool insertion slot 6 gradually decreases along the direction in which the disassembly and assembly tools are inserted.

[0069] It should be noted that after adding the sealing isolation cover plate 5, the motor tail end detection electrical connection assembly 01 of this utility model, which includes a detachable and easily damaged module, requires an additional step of pulling out the sealing isolation cover plate 5 between the second and third steps when replacing the detachable and easily damaged module 2. Specifically, the tool inserted between the sealing isolation cover plate 5 and the rear cover 1 is inserted into the gap 6 using a tooling fixture, and then the tooling fixture is pulled in the opposite direction to pull out the sealing isolation cover plate 5.

[0070] In this embodiment, the sealing isolation cover 5 is made of elastic rubber material, and the tool insertion slot 6 is a slender tapering structure. This structure makes the opening of the tool insertion slot 6 have little impact on the isolation effect of the sealing isolation cover 5, and at the same time facilitates the insertion of disassembly tools and the removal of the sealing isolation cover 5.

[0071] According to a specific embodiment of the present invention, the side of the Hall PCB board 21 near the wire buckle 31 is the circuit arrangement surface 212, and the wire end on the spool 81 is connected to the circuit arrangement surface 212.

[0072] In this embodiment, with this structure, when the plug-in module 3 is pulled out, the circuit layout surface 212 will be exposed, making it easier for maintenance personnel to disconnect the wire ends from the Hall PCB board 21. For example, the operator can use a soldering iron to heat the connection solder joint between the wire end of the motor spool 81 and the Hall PCB board 21 to separate the wire end.

[0073] According to a specific embodiment of the present invention, the outer side of the Hall PCB board 21 is provided with a protruding Hall plate positioning wall 213, and the side wall of the lower receiving hole 14 is provided with a recessed Hall plate positioning notch 15, and the Hall plate positioning wall 213 is inserted into the Hall plate positioning notch 15.

[0074] In this embodiment, the Hall plate positioning wall 213 and the Hall plate positioning notch 15 cooperate to prevent the Hall PCB board 21 from rotating. When performing maintenance, after the removable vulnerable module 2 is pulled out, when a new removable vulnerable module 2 is installed, the Hall plate positioning wall 213 can be aligned with the Hall plate positioning notch 15 for insertion, achieving quick positioning and ensuring the correct installation angle of the replaced vulnerable module.

[0075] According to a specific embodiment of the present invention, the Hall PCB board 21 is circular in shape, the wire through hole 211 is an oblong hole, the number of wire through holes 211 is 3, and the 3 wire through holes 211 are evenly arranged around the center of the wire through hole 211.

[0076] In this embodiment, three wire holes 211 are provided to facilitate the even arrangement of the wire ends of phases U, V, and W respectively. The structure of the waist-shaped holes is convenient for adjusting the position.

[0077] According to a specific embodiment of the present invention, the plug-in PCB board 32 is provided with a through seat hole 322, the end of the pin seat 33 away from the detachable and vulnerable module 2 is fixedly inserted into the seat hole 322, the end of the pin seat 33 near the detachable and vulnerable module 2 is provided with a recessed insertion hole 331, the Hall PCB board 21 is provided with a through pin hole 214, one end of the pin 23 is fixedly inserted into the pin hole 214, and the other end of the pin 23 is inserted into the insertion hole 331.

[0078] In this embodiment, the socket 322 penetrates the plug-in PCB board 32, facilitating the connection of the circuit from one side of the plug-in PCB board 32 to the other side via the socket 322. The pinhole 214 penetrates the Hall PCB board 21, facilitating the connection of the circuit from one side of the Hall PCB board 21 to the other side via the pinhole 214.

[0079] According to a specific embodiment of this utility model, the insertion hole 331 is a blind hole, the bottom surface of the insertion hole 331 is the pin limiting surface 3311, the upper part of the Hall PCB board 21 abuts against the lower part of the partition 12, the upper outer periphery of the sealing isolation cover plate 5 is provided with a protruding cover support ring 52, the upper part of the cover support ring 52 abuts against the lower part of the Hall PCB board 21, and the lower part of the insertion pin 23 abuts against the pin limiting surface 3311.

[0080] More specifically, both pin 23 and pin socket 33 are made of conductive material (such as copper).

[0081] In this embodiment, a specific structure for axial limiting of the detachable and vulnerable module 2 and the plug-in module 3 is provided. Specifically, the blind-hole structure of the insertion hole 331 is used to limit the position of the insertion pin 23.

[0082] According to a specific embodiment of this utility model, the wire buckle 31 includes a connecting piece 311 and a wire-fastening ring 312 that are fixedly connected vertically; the connecting piece 311 is generally circular in shape, the wire-fastening ring 312 is generally circular in shape, and the interior of the connecting piece 311 is in communication with the interior of the wire-fastening ring 312; the lower circumference of the wire-fastening ring 312 is provided with multiple expansion joints 3121; the lower part of the wire-fastening ring 312 extends out of the tail cap 4; the wire buckle 31 also includes multiple evenly arranged around the center of the connecting piece 311 and fixed to the top of the connecting piece 311. The connecting bracket 313 has a raised support boss 3131 on its outer side, and a support step 3132 is formed between the outer and inner sides of the connecting bracket 313. The plug-in PCB board 32 has a recessed support notch 321 on its outer side, and the shape of the support notch 321 matches the shape of the support boss 3131. The support boss 3131 is inserted into the support notch 321, and the support step 3132 supports the bottom of the connecting piece 311. The support boss 3131 is fixedly connected to the connecting piece 311.

[0083] In this embodiment, when the cable passes through the buckle ring 312, the compression tightening slit 3121 is opened, so that the buckle ring 312 holds the cable tightly. When the cable is subjected to tension, the tension is transmitted to the buckle ring 31, preventing the cable from being pulled off the plug-in PCB board 32.

[0084] The support boss 3131 and the support notch 321 are inserted together, which can restrict the rotation of the plug-in PCB board 32 relative to the wire clip 31. The support step 3132 supports the bottom of the connecting piece 311, and the support boss 3131 can restrict the horizontal movement of the plug-in PCB board 32. A stable connection between the plug-in PCB board 32 and the wire clip 31 can be achieved. More specifically, the wire clip 31 is integrally molded from plastic material, and the connecting bracket 313 is glued to the plug-in PCB board 32.

[0085] The lower part of the cable clip 312 extends out of the tail cap 4, which helps to ensure the length of the cable clip 312 and facilitates the secure fastening of the cable.

[0086] According to a specific embodiment of the present invention, the annular cover 11 is provided with an external thread 111 on the outer side near the lower receiving hole 14; the upper inner side of the tail cover 4 is provided with an internal thread 42 that mates with the external thread 111; and the annular cover 11 is provided with a locking structure 112 on the outer side near the lower receiving hole 14.

[0087] In this embodiment, rotating the tail cover 4 separates the tail cover 4 from the rear cover 1. Besides a threaded connection, a snap-fit ​​structure can also be used between the tail cover 4 and the rear cover 1. Due to the presence of the anti-reverse snap-fit ​​structure 112, when the motor tail end detection electrical connection assembly 01 of the detachable and easily damaged module of this invention is connected to the motor housing 10, the housing 10 has a slot 101 that mates with the anti-reverse snap-fit ​​structure 112. The anti-reverse snap-fit ​​structure 112 aligns with the housing 10 and presses in, achieving a stable connection between the rear cover 1 and the motor housing 10.

[0088] This utility model also discloses a hollow cup motor 100, including a motor body module 02 and a motor tail end detection electrical connection assembly 01 with a detachable and easily damaged module as described in the above embodiment. The motor tail end detection electrical connection assembly 01 with the detachable and easily damaged module is installed at the lower part of the motor body module 02. The motor body module 02 includes a rotating shaft 7, and a rotor assembly 8, a stator assembly 9, and a housing 10 that are sequentially fitted around the rotating shaft 7 from the inside to the outside. The rotor assembly 8 includes a spool 81 with a wire end connected to it. The wire end passes through a wire hole 211 and is soldered to the circuit layout surface 212. The inner wall of the housing 10 is provided with a slot 101 that cooperates with a backstop latching structure 112. The backstop latching structure 112 is inserted into the slot 101. A bearing 011 is provided in the upper receiving hole 13, and the lower part of the rotating shaft 7 is inserted into the bearing 011.

[0089] In this embodiment, the anti-reverse locking structure 112 is inserted into the slot 101 to achieve a secure connection between the rear cover 1 and the housing 10. The above-mentioned motor tail-end detection electrical connection assembly 01 containing a detachable and easily damaged module is applied to the hollow cup motor 100. When the sensor 22 in the hollow cup motor 100 is damaged, for example, when the total price of a 16mm outer diameter hollow cup motor is several thousand yuan, the total cost of the detachable and easily damaged module 2 is only about tens of yuan. After replacing the entire detachable and easily damaged module 2 (the specific replacement method has been described in detail above), the motor can continue to be used, improving the motor's service life and significantly reducing costs. It also avoids the waste of resources caused by complete scrapping. According to a specific embodiment of the present invention, the motor main body module 02 also includes a front cover 012 that is threadedly connected to the upper part of the housing 10; the hollow cup motor 100 also includes a reducer module 013 installed on the upper part of the motor main body module 02; the rotor assembly 8 is provided with an upper balance block 014 and a lower balance block 015 at both ends; the sensor 22 is a Hall sensor 22; the Hall PCB board 21 integrates three-phase wire pads and a Hall circuit board.

[0090] Furthermore, the motor tail end detection electrical connection assembly 01 with a detachable and easily damaged module in this embodiment is detachable from the motor main body module 02, making it suitable for scenarios where the load is a scalpel. For example, when the load of the coreless motor 100 is a scalpel used to remove tumors, the entire motor tail end detection electrical connection assembly 01 with a detachable and easily damaged module can be removed, or only the detachable and easily damaged module of the motor tail end detection electrical connection assembly 01 (excluding the rear cover 1) can be removed; the remaining parts of the coreless motor 100 can be disinfected to avoid the disinfection operation affecting the electrical components and detection elements in the motor tail end detection electrical connection assembly 01 with the detachable and easily damaged module.

[0091] More specifically, the three phases in the three-phase pads are U, V, and W phases.

[0092] In this embodiment, the front cover 012 is used to block the opening at the upper end of the housing 10.

[0093] The reducer module 013 is connected to the shaft 7 to reduce speed and increase torque for the shaft 7. The reducer module 013 includes: a gear train, a reducer input shaft connected to the shaft 7, and a reducer output shaft connected to the load (such as a scalpel).

[0094] The main purpose of placing the balance weights is to correct the dynamic balance of the rotor, ensuring smooth operation of the motor at high speeds and reducing vibration and noise. The three-phase wire pads and Hall effect circuit board facilitate connector connections and the formation of the required circuitry.

[0095] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components; and they can also refer to a "transmission connection," that is, a power connection through various suitable methods such as belt drive, gear drive, or sprocket drive. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. An electrical connection assembly for a motor endshield having a removable frangible module, comprising: The application relates to a motor tail end detection electric connection assembly containing a detachable and damaged module. The rear cover comprises a ring-shaped cover body surrounding a containing cavity, a partition plate is fixedly arranged in the containing cavity and divides the containing cavity into an upper containing hole and a lower containing hole, a Hall head insertion hole and a rotating shaft mounting hole are arranged on the partition plate, the tail cover comprises a containing slot hole, the upper part of the tail cover is detachably connected with the lower part of the ring-shaped cover body, the containing slot hole is communicated with the lower containing hole, the detachable and damaged module comprises a Hall PCB board, sensors and insertion pins which are respectively fixed on the upper and lower sides of the Hall PCB board, the Hall PCB board and the insertion pins are located in the lower containing hole, the sensors extend into the upper containing hole through the Hall head insertion hole, a wire passing hole is arranged on the Hall PCB board, the plug-in module comprises a wire buckle, a plug-in PCB board and a needle seat which is fixed on the plug-in PCB board, the plug-in PCB board is located in the containing slot hole, the wire buckle is partially or wholly located in the containing slot hole, and the upper part of the wire buckle is fixedly connected with the plug-in PCB board, the lower part of the insertion pin is movably inserted into the needle seat to realize the electrical connection of the insertion pin and the needle seat. The motor tail end detection electric connection assembly containing the detachable and damaged module further comprises a sealing isolation cover plate arranged in the lower containing hole, the outer side wall of the sealing isolation cover plate abuts against the inner side wall of the rear cover, the sealing isolation cover plate is located between the Hall PCB board and the plug-in PCB board, the sealing isolation cover plate is provided with a needle penetrating hole, the insertion pin penetrates through the needle penetrating hole, and the outer wall of the insertion pin is attached to the inner wall of the needle penetrating hole.

2. The motor endshield detection electrical connection assembly with a removable fragile module of claim 1, wherein, The sealing isolation cover plate is made of rubber material, a plurality of tool insertion gaps are arranged between the sealing isolation cover plate and the rear cover for the insertion of a dismounting tool, the tool insertion gaps are arranged at intervals, and the tool insertion gaps are tapered structures along the direction of the insertion of the dismounting tool.

3. The motor endshield detection electrical connection assembly containing a removable fragile module of claim 2, wherein, The side of the Hall PCB board close to the wire buckle is a circuit arrangement surface, the outer side of the Hall PCB board is provided with a protruding Hall board positioning wall, the side wall of the lower containing hole is provided with a recessed Hall board positioning slot, and the Hall board positioning wall is inserted into the Hall board positioning slot, the Hall PCB board is in a whole circular shape, the wire passing hole is a waist-shaped hole, the number of the wire passing holes is three, and the three wire passing holes are uniformly arranged around the center of the wire passing hole.

4. The motor endshield detection electrical connection assembly containing a removable fragile module of claim 3, wherein, The plug-in PCB board is provided with a seat hole penetrating through the plug-in PCB board, one end of the needle seat away from the detachable and damaged module is fixedly inserted into the seat hole, the other end of the needle seat close to the detachable and damaged module is provided with a recessed insertion hole, the Hall PCB board is provided with a needle hole penetrating through the Hall PCB board, one end of the insertion pin is fixedly inserted into the needle hole, and the other end of the insertion pin is inserted into the insertion hole.

5. The motor endshield detection electrical connection assembly containing a removable fragile module of claim 4, wherein, The insertion hole is a blind hole, the bottom surface of the insertion hole is a needle limiting surface, the upper part of the Hall PCB board abuts against the lower part of the partition plate, the upper part of the outer circumferential side of the sealing isolation cover plate is provided with a protruding cover support ring, the upper part of the cover support ring abuts against the lower part of the Hall PCB board, and the lower part of the insertion pin abuts against the needle limiting surface.

6. The motor endshield detection electrical connection assembly containing a removable fragile module of claim 5, wherein, ​ 7. The motor endshield detection electrical connection assembly containing a removable fragile module of claim 6, wherein, The wire buckle comprises a connecting sheet fixedly connected with a buckle wire ring up and down; the connecting sheet is a whole annular sheet, the buckle wire ring is a whole annular, and the inside of the connecting sheet is in communication with the inside of the buckle wire ring; a plurality of expansion seams are arranged around the lower part of the buckle wire ring; the lower part of the buckle wire ring extends out of the tail cover; the wire buckle further comprises a plurality of connecting supports which are uniformly arranged around the center of the connecting sheet and fixed to the top of the connecting sheet; the outer side of the connecting support is provided with a raised support boss, and a support step is formed between the outer side and the inner side of the connecting support; the outer side of the plug-in PCB board is provided with a recessed support notch, the shape of the support notch matches the shape of the support boss, the support boss is inserted into the support notch, and the support step supports the bottom of the connecting sheet; and the support boss is fixedly connected with the connecting sheet.

8. The motor endshield detection electrical connection assembly containing a removable fragile module of claim 7, wherein, The annular cover body is provided with a cover outer thread near the outer side of the lower accommodating hole; the upper inner side of the tail cover is provided with a cover inner thread matched with the cover outer thread; and the annular cover body is provided with a retreat-stopping clamping structure near the outer side of the lower accommodating hole.

9. A hollow cup motor, characterized by The motor tail end detection electric connection assembly comprising a motor main body module and the detachable and vulnerable module as claimed in any one of claims 1-8 is installed at the lower part of the motor main body module; wherein: the motor main body module comprises a rotating shaft, a rotor assembly, a stator assembly and a casing which are successively sleeved from inside to outside outside the rotating shaft, the rotor assembly comprises a wire cup, a wire head is connected to the wire cup, the wire head penetrates through the wire hole and is welded to the circuit arrangement surface; the inner wall of the casing is provided with a clamping groove matched with the retreat-stopping clamping structure, and the retreat-stopping clamping structure is clamped into the clamping groove; a bearing is arranged in the upper accommodating hole, and the lower part of the rotating shaft is inserted into the bearing.

10. A hollow cup machine according to claim 9, characterized in that The motor main body module further comprises a front cover threadedly connected with the upper part of the casing; the hollow cup motor further comprises a speed reducer module installed at the upper part of the motor main body module; the two ends of the rotor assembly are respectively provided with an upper balancing block and a lower balancing block; the sensor is a Hall sensor; and the Hall PCB board is integrated with a three-phase wire pad and a Hall circuit board. The annular cover body is provided with a cover outer thread near the outer side of the lower accommodating hole; the upper inner side of the tail cover is provided with a cover inner thread matched with the cover outer thread; and the annular cover body is provided with a retreat-stopping clamping structure near the outer side of the lower accommodating hole.

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