A protective housing with an anti-detachment structure at the motor lead end and its method

Abstract

The present invention relates to the technical field of motor lead ends, and specifically to a protective housing with an anti-detachment structure for motor lead ends and a method thereof. It includes an installation box installed on a motor body. In front of the installation box, there are several wiring terminals corresponding to and connected to a power cord. Several power connection components are embedded in the front side wall of the installation box. The power connection components are used to trigger conduction between the lead wires and the wiring terminals without being connected. The power connection component includes a connection sleeve, a conductive sleeve sleeved on the inner wall of the connection sleeve, and a wire sleeve group arranged at the front and rear ends of the conductive sleeve without contact. The two wire sleeve groups are respectively sleeved and matched with the lead wires and the wiring terminals. Through the power connection components provided in the present invention, the lead wires and the wiring terminals are separated while maintaining the energized state. The vibration generated during the operation of the motor body is not transmitted to the wiring terminals through the lead wires, and thus is not affected by the reaction force of the wiring terminals and loosened.

Description

Technical Field

[0001] The invention relates to the technical field of motor lead terminals, and in particular to a protective shell with an anti-falling structure for motor lead terminals and a method thereof. Background Art

[0002] During the operation of the motor, its lead ends need to withstand various forces and vibrations from inside and outside the motor. If these forces or vibrations are too large, the lead ends may become loose or fall off, thus affecting the normal operation of the motor.

[0003] Application number CN202220962214.7 discloses a protective housing with an anti-drop structure for the lead terminal of a motor, including a lead terminal frame and a lead hole, a lead installation box is arranged above the lead terminal frame, and an anti-drop frame is installed at the front end of the lead installation box, the lead hole is opened at one end of the anti-drop frame, a lead terminal merging frame is installed below the lead hole, and a slide groove is opened inside the lead terminal merging frame. The lead installation box can be movably embedded in the lead terminal merging frame, so that the lead installation box can be slidably installed in the slide groove and the slide rail, and the lead installation box can slide along the lead terminal frame through the slide groove and the slide rail, and the motor lead terminal group can be installed and clamped to avoid the motor lead terminal clamping falling off.

[0004] Traditional methods of fixing motor lead terminals often use simple screws or snap connections, which are prone to failure when subjected to large forces or vibrations. After long-term operation, some fixed structures will wear or age, resulting in a decrease in the anti-falling effect. Once the motor lead terminal falls off, it may not only cause motor failure, but also cause safety accidents such as short circuits and fires. Therefore, designing motor lead terminals with anti-falling structures is crucial to ensure the safety of equipment and personnel. Summary of the invention

[0005] In order to overcome the defects in the prior art, the purpose of the present invention is to provide a protective housing with an anti-falling structure for the lead terminal of a motor and a method thereof, so as to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, on the one hand, the present invention provides a protective shell with an anti-falling structure for the lead terminal of a motor, comprising a mounting box mounted on a motor body, wherein two rows of lead terminals are arranged inside the mounting box, wherein one row of the lead terminals contacts a plurality of lead wires connected to the input terminal of a circuit board of the motor body, and another row of the lead terminals contacts a plurality of lead wires penetrating the front side wall of the mounting box, wherein a plurality of wirings corresponding to the power line are arranged in front of the mounting box, wherein a plurality of power connectors are embedded in the front side wall of the mounting box, wherein the power connectors are used to correspond to the trigger lead wires and the wiring wires for electrical conduction and are not connected, wherein the power connectors comprise a connecting sleeve, a conductive sleeve mounted on the inner wall of the connecting sleeve, and a wire sleeve group mounted in the front and rear ends of the conductive sleeve and not in contact, wherein the two wire sleeve groups are respectively matched with the lead wires and the wiring sleeves; wherein the vibration generated when the motor body is working does not act on the wiring wires through the lead wires, and thus is not loosened due to the reaction force of the wiring wires;

[0007] The front end of the connecting sleeve is sleeved with an anti-straining piece for elastically retracting the wiring, and the anti-straining piece is composed of a pair of pulling sleeves and a wire-receiving section therebetween, the front and rear ends of the wire-receiving section are correspondingly connected to the two pulling sleeves, and there is at least one curved section extending laterally in the middle; the wiring runs through the interior of the anti-straining piece and is in a retracted state along its shape, and pulling blocks fixedly connected to the wiring are provided inside and outside the front end of the pulling sleeve located in the front, and when the wiring is squeezed and pulled by the outside, the anti-straining piece is flattened as a whole by the pulling block to offset the external force acting on the lead end.

[0008] As a further improvement of the present technical solution, the connecting sleeve is made of plastic material, the conductive sleeve is made of copper material and is made into a round sleeve structure, the wire sleeve group is composed of a copper sleeve and a star-shaped spring clip sleeve, the two copper sleeves are respectively connected with the lead wire and the wiring sleeve, and the star-shaped spring clip is made of conductive metal and is a closed star-shaped sheet.

[0009] As a further improvement of the technical solution, a plurality of sleeve rods are embedded in the inner end of the copper sleeve, and the sleeve rods are extended axially along the copper sleeve and do not contact the outer side of the copper sleeve. The plurality of sleeve rods are arranged in a ring shape with equal intervals and are sleeved on the outer sides of several inner recesses of the star-shaped spring piece.

[0010] As a further improvement of the technical solution, an annular boss is provided in the middle of the inner wall of the conductive sleeve, and a number of pressure rods are embedded in the front and rear ends of the boss in a circular shape with equal intervals. The pressure rods do not contact the inner wall of the conductive sleeve, and the pressure rods are connected to the inner sides of several outer protrusions of the star-shaped spring piece.

[0011] As a further improvement of the present technical solution, the power connection piece also includes a connecting sleeve, a movable sleeve sleeved with the inner wall of the connecting sleeve, and a wire sleeve group sleeved inside the rear end of the movable sleeve; the copper sleeve in the wire sleeve group is matched with the lead sleeve, the movable sleeve is made of copper material and a wire sleeve matching with the wiring sleeve is arranged at the center of its front port.

[0012] As a further improvement of the technical solution, a number of movable elastic pieces are equidistantly arranged in a ring shape between the wire sleeve and the front end of the movable sleeve. The movable elastic pieces are in a bent sheet shape, and the whole movable sleeve is made of conductive metal material.

[0013] As a further improvement of the technical solution, both the pulling sleeve and the wire receiving section are composed of a pair of vertical strip-shaped pieces and are made into sheet shapes using spring steel. Among them, the pulling sleeve has a U-shaped structure and a sleeve hole is opened on its end face. The wiring is inserted and slid in the sleeve hole; the wire receiving section is in an S shape and reinforcing pieces are fixedly connected to the upper and lower surfaces at the relative position of the middle part of the wire receiving section and the pulling sleeve. A sleeve ring that is tightly sleeved with the front end of the connecting sleeve is provided at the outer end of the pulling sleeve.

[0014] As a further improvement of the technical solution, an arc-shaped wire storage section is further included between the two pulling sleeves. A number of reinforcing strips are equidistantly arranged on the upper and lower surfaces of the middle part of the wire storage section, and the reinforcing strips are in a horizontally bent shape.

[0015] As a further improvement of the technical solution, a silica gel sleeve is sleeved on the bare wire end of the wiring, and the silica gel sleeve is in an inner sleeved fit with the front end of the connecting sleeve; pressing pieces are sleeved on a number of lead ends in each row, and nuts are threadedly connected to the lead ends. A pressing strip is embedded between the tops of the two rows of oppositely arranged lead ends.

[0016] On the other hand, the present invention provides a protection method for a motor lead end with an anti-detachment structure. Using the above-mentioned protection housing for a motor lead end with an anti-detachment structure, it includes the following steps:

[0017] S1. First, the connecting sleeve is sleeved into the through hole opened on the front side wall of the installation box;

[0018] S2. Then, the two wire sleeve groups are respectively sleeved into the front and rear ends of the conductive sleeve and the whole is sleeved into the inside of the connecting sleeve;

[0019] S3. Next, the wiring and the leads are respectively sleeved into the wire sleeve groups at the front and rear;

[0020] S4. Then, the anti-pulling member is integrally sleeved on the outside of the wiring, and the rear pulling sleeve is fixedly sleeved with the connecting sleeve. Then, two pairs of pulling blocks are bonded to the upper and lower surfaces of the wiring at the front pulling sleeve;

[0021] S5. When the vibration generated during the operation of the motor body acts on the leads and the wire sleeve groups, it is buffered, and thus it will not become loose under the influence of the reaction force of the wiring;

[0022] S6. When the wiring is subjected to external extrusion and pulling forces, the anti-pulling member is driven by the pulling blocks to be flattened as a whole to offset the external force acting on the lead end.

[0023] Compared with the prior art, the beneficial effects of the present invention:

[0024] 1. The motor lead terminal has a protective shell with an anti-drop structure and a method thereof, the lead and the wiring are separated by a power connection piece, while the power is kept on, and the transmission of vibration force between the lead and the wiring is blocked by the two wire sleeves not being in contact; the vibration generated by the motor body when working does not act on the wiring through the lead, and is thus not affected by the reaction force of the wiring to loosen.

[0025] 2. The motor lead terminal has a protective shell with an anti-falling structure and a method thereof. The anti-pull piece is provided to elastically retract the wiring. The wiring runs through the anti-pull piece and is in a retracted state along its shape. Pull blocks fixedly bonded to the wiring are provided inside and outside the front end of the pull sleeve. When the wiring is squeezed and pulled by the outside, the anti-pull piece is flattened as a whole through the pull block to offset the external force acting on the lead terminal, thereby alleviating the pulling force and vibration force of the wiring when the external power supply is connected.

[0026] 3. The motor lead terminal has a protective shell with an anti-falling structure and a method thereof. A pressing sheet is sleeved on each row of lead terminals, and a nut is threadedly connected on the lead terminal to tighten the lead terminal head and ensure good contact with the lead terminal; a pressure strip is embedded between the tops of the two rows of lead terminals that are arranged opposite to each other to further prevent the nut from loosening when the motor body vibrates during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings described herein are only for explanation purposes and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the various components in the figures are only schematic, used to help understand the present invention, and are not specifically limited to the shapes and proportional dimensions of the various components of the present invention. Those skilled in the art can select various possible shapes and proportional dimensions to implement the present invention according to the teachings of the present invention.

[0028] Figure 1 It is a schematic diagram of the overall assembly structure of the present invention;

[0029] Figure 2 It is a schematic diagram of the internal assembly structure of the installation box of the present invention;

[0030] Figure 3 It is a schematic diagram of the assembly structure of the power connection piece and the anti-tension piece of the present invention;

[0031] Figure 4 It is a schematic diagram of the internal assembly structure of the power connection part of the present invention;

[0032] Figure 5 This is a disassembled diagram of the power connection assembly of the present invention;

[0033] Figure 6 It is a schematic diagram of the assembly structure of the movable suit of the present invention;

[0034] Figure 7 It is a schematic diagram of the structure of the movable sleeve of the present invention;

[0035] Figure 8 It is a schematic diagram of the wiring structure of the present invention;

[0036] Figure 9 It is one of the schematic diagrams of the anti-pulling member structure of the present invention;

[0037] Figure 10 It is another schematic diagram of the anti-pulling member structure of the present invention;

[0038] The meanings of each label in the figure are as follows:

[0039] 100, motor body; 110, lead end; 120, lead; 121, wiring; 122, pulling block; 123, silica gel sleeve; 130, mounting box; 140, pressing piece; 150, pressing strip;

[0040] 200, power connection member; 210, connecting sleeve; 220, conductive sleeve; 221, pressing rod; 230, wire sleeve group; 231, copper sleeve; 2311, sleeve rod; 232, star-shaped spring piece;

[0041] 240, movable sleeve; 241, wire sleeve; 242, movable spring piece;

[0042] 300, anti-pulling member; 310, pulling sleeve; 311, sleeve hole; 320, wire receiving section; 321, reinforcing piece; 330, sleeve ring; 340, wire storage section; 341, reinforcing strip. Detailed implementation manners

[0043] Combined with the description of the drawings and the specific implementation manners of the present invention, the details of the present invention can be understood more clearly. However, the specific implementation manners of the present invention described herein are only for the purpose of explaining the present invention and cannot be understood in any way as a limitation of the present invention. Under the teaching of the present invention, those skilled in the art can conceive any possible variations based on the present invention, and these should all be regarded as belonging to the scope of the present invention. The terms "installation" and "connection" should be understood in a broad sense, which can be directly connected or indirectly connected through an intermediate medium.

[0044] The orientation or positional relationship indicated by the terms "central axis", "vertical", "horizontal", "front", "rear", "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", etc. used herein is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, in the description of the present invention, the meaning of "several" is two or more, unless otherwise clearly and specifically defined.

[0045] Please refer to Figures 1 - 10As shown in the figure, the present invention provides a protective housing with an anti-detachment structure at the lead end of the motor, which includes an installation box 130 installed on the motor body 100. Inside the installation box 130, there are two rows of several lead ends 110. The two rows of several lead ends 110 are integrated on a plastic plate, and they are electrically connected at the bottom. A number of leads 120 connected to the input end of the circuit board of the motor body 100 are in contact with one row of lead ends 110, and a number of leads 120 passing through the front side wall of the installation box 130 are in contact with the other row of lead ends 110. In front of the installation box 130, there are several terminals 121 corresponding to the power supply line. A plug is installed at the front end of the several terminals 121, and then the power can be connected to the motor body 100 to make it work powered on;

[0046] A pressing piece 140 is sleeved on each row of several lead ends 110, and a nut is threadedly connected to the lead end 110 to tightly press the end of the lead 120 in good contact with the lead end 110; A pressing strip 150 is embedded between the tops of the two rows of relatively arranged lead ends 110 to further prevent the nut from loosening when the motor body 100 is working and vibrating.

[0047] Specifically, several power connection components 200 are embedded in the front side wall of the installation box 130. The power connection components 200 are used to trigger the conduction of the leads 120 and the terminals 121 correspondingly without being connected, so that the leads 120 and the terminals 121 do not transmit force to each other while keeping energized, avoiding the loosening of the lead ends 110; The power connection component 200 includes a connecting sleeve 210, a conductive sleeve 220 sleeved on the inner wall of the connecting sleeve 210, and a wire sleeve group 230 arranged at the front and rear ends of the conductive sleeve 220 without contact. Through the conduction and transmission of the conductive sleeve 220 and the two wire sleeve groups 230, the two wire sleeve groups 230 are respectively sleeved and matched with the leads 120 and the terminals 121; Since the two wire sleeve groups 230 do not contact, the vibration force transmission between the leads 120 and the terminals 121 is blocked; The vibration generated when the motor body 100 works does not act on the terminal 121 through the lead 120, and thus is not affected by the reaction force of the terminal 121 and loosens.

[0048] Furthermore, in order to relieve the pulling force and vibration force of the terminal 121 when connecting to an external power supply, an anti-pulling component 300 for elastically retracting and releasing the terminal 121 is sleeved at the front end of the connecting sleeve 210, so that when the terminal 121 is subjected to an external force, it can be offset by the deformation ability of the anti-pulling component 300 itself; The anti-pulling component 300 is composed of a pair of pulling sleeves 310 and a retracting section 320 between them. The front and rear ends of the retracting section 320 are correspondingly connected to the two pulling sleeves 310, and at least one of its middle parts has a bending section extending horizontally; So that a longer terminal 121 can be accommodated in the retracting section 320 to offset the external pulling force;

[0049] The wiring 121 passes through the interior of the anti-pull member 300 and is in a retracted state along its shape. The front end of the pull sleeve 310 is provided with a pull block 122 fixedly bonded to the wiring 121. When the wiring 121 is squeezed and pulled by the outside, the pull block 122 drives the anti-pull member 300 to flatten as a whole to offset the external force acting on the lead end 110.

[0050] The bare wire end of the connection 121 is provided with a silicone sleeve 123 , which is sleeved and matched with the front end of the connecting sleeve 210 , and the shock-absorbing effect of the silicone sleeve 123 is used to further alleviate the influence of the external force of the connection 121 on the lead 120 .

[0051] Specifically, the connecting sleeve 210 is made of plastic material to prevent leakage; the conductive sleeve 220 is made of copper material to form a round sleeve structure, and the wire sleeve group 230 is composed of a copper sleeve 231 and a star-shaped spring piece 232. The two copper sleeves 231 are respectively connected to the lead 120 and the wiring 121. The star-shaped spring piece 232 is made of conductive metal to form a closed star-shaped sheet. The radial elastic force of the star-shaped spring piece 232 and its own deformation heat and energy consumption are used to reduce the vibration force from the operation of the motor body 100.

[0052] Furthermore, a plurality of sleeve rods 2311 are embedded in the inner end of the copper sleeve 231, and the sleeve rods 2311 are extended axially along the copper sleeve 231 and do not contact the outer side of the copper sleeve 231. The plurality of sleeve rods 2311 are arranged in a ring shape with equal intervals and are sleeved on the outer sides of a plurality of inner recesses of the star-shaped spring pieces 232; an annular boss is provided in the middle part of the inner wall of the conductive sleeve 220, and a plurality of pressure rods 221 are embedded in a ring shape with equal intervals at the front and rear ends of the boss, and the pressure rods 221 do not contact the inner wall of the conductive sleeve 220, and the plurality of pressure rods 221 are sleeved on the inner sides of a plurality of outer protrusions of the star-shaped spring pieces 232; so that the star-shaped spring pieces 232 are stably sleeved between the conductive sleeve 220 and the copper sleeve 231, and the lead wire 120 and the wiring 121 are centrally positioned.

[0053] In addition, another form of protection is provided. The electrical connection piece 200 further includes a connection sleeve 210, a movable sleeve 240 sleeved with the inner wall of the connection sleeve 210, and a wire sleeve group 230 sleeved inside the rear end of the movable sleeve 240; the copper sleeve 231 in the wire sleeve group 230 sleeves with the lead wire 120, the movable sleeve 240 is made of copper material, and the center of its front port is provided with a wire sleeve 241 sleeved with the wire 121;

[0054] A plurality of movable spring sheets 242 are provided in a circular shape at equal intervals between the wire sleeve 241 and the front end of the movable sleeve 240. The movable spring sheets 242 are in the shape of bent sheets, and the movable sleeve 240 is made of conductive metal material as a whole. That is, the wire sleeve 241 is used to centrally position the wiring 121, and the bending heat and energy dissipation of the plurality of movable spring sheets 242 slow down the vibration force of the wiring 121 to avoid transmission to the lead 120 and the lead end 110.

[0055] Specifically, the pull sleeve 310 and the wire collection segment 320 are both composed of a pair of vertical strips, and are made of spring steel in sheet form, so that they have resilience to drive the wiring 121 to be retracted and lengthened to cope with the pulling force; the pull sleeve 310 is a U-shaped structure and a sleeve hole 311 is opened on its end face, and the wiring 121 is plugged and slid into the sleeve hole 311; the wire collection segment 320 is S-shaped and a reinforcing sheet 321 is fixedly connected to the upper and lower surfaces of the middle part opposite to the pull sleeve 310, and the reinforcing sheet 321 is used to stabilize the wire collection segment 320 and maintain the state of horizontally clamping the wiring 121; the outer end of the pull sleeve 310 is provided with a ring 330 that is tightly sleeved with the front end of the connecting sleeve 210 for easy disassembly and assembly.

[0056] Furthermore, an arc-shaped wire storage segment 340 is also included between the two pulling sleeves 310. The wire storage segment 340 and the wire collection segment 320 have the same function, which is to reserve a section of the wiring 121 to cope with the pulling force. A plurality of reinforcing strips 341 are evenly spaced on the upper and lower sides of the middle of the wire storage segment 340. The reinforcing strips 341 are horizontally curved to ensure that the wire storage segment 340 horizontally clamps the wiring 121. At the same time, when the wire storage segment 340 is flattened, the reinforcing strips 341 will be straightened to jointly resist external forces.

[0057] The present invention also provides a protection method for a motor lead terminal having an anti-falling structure, using the protective housing having the anti-falling structure for the motor lead terminal, comprising the following steps:

[0058] S1, first insert the connecting sleeve 210 into the through hole provided on the front side wall of the installation box 130;

[0059] S2, then insert the two wire sleeve groups 230 into the front and rear ends of the conductive sleeve 220 respectively, and then insert the entire wire sleeve 230 into the connecting sleeve 210;

[0060] S3, insert the connection wire 121 and the lead wire 120 into the front and rear wire sets 230 respectively;

[0061] S4, the anti-pull member 300 is put on the outside of the wiring 121 as a whole, and the pull sleeve 310 at the rear is fixedly connected with the connecting sleeve 210, and then the two pairs of pull blocks 122 are bonded to the upper and lower surfaces of the pull sleeve 310 at the front of the wiring 121;

[0062] S5, when the motor body 100 is working, the vibration generated acts on the lead wire 120 and the wire sleeve 230 to buffer it, and then it is not affected by the reaction force of the wiring 121 to loosen;

[0063] S6. When the connection 121 is squeezed and pulled by the outside world, the pulling block 122 drives the anti-pulling member 300 to flatten as a whole to offset the external force acting on the lead end 110.

[0064] It should be noted that the above embodiments are only for explaining the technical concept and features of the present invention, and the purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it accordingly, and it cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A protective housing with an anti-detachment structure at the motor lead end, comprising an installation box (130) installed on a motor body (100). Inside the installation box (130), there are two rows of a number of lead ends (110). A number of leads (120) connected to the input end of the circuit board of the motor body (100) are in contact with one row of the lead ends (110), and a number of leads (120) penetrating the front side wall of the installation box (130) are in contact with the other row of the lead ends (110). It is characterized in that: A plurality of wirings (121) corresponding to the power lines are arranged in front of the installation box (130), a plurality of electrical connection pieces (200) are embedded in the front side wall of the installation box (130), the electrical connection pieces (200) are used to electrically connect the trigger lead (120) and the wirings (121) and are not connected, the electrical connection pieces (200) include a connection sleeve (210), a conductive sleeve (220) sleeved on the inner wall of the connection sleeve (210), and a wire sleeve group (230) arranged in the front and rear ends of the conductive sleeve (220) and not in contact with each other, and the two wire sleeve groups (230) are sleeved and matched with the lead (120) and the wirings (121) respectively; The front end of the connecting sleeve (210) is sleeved with an anti-tensioning piece (300) for elastically retracting the wiring (121); the anti-tensioning piece (300) is composed of a pair of pulling sleeves (310) and a wire-receiving section (320) therebetween; the front and rear ends of the wire-receiving section (320) are correspondingly connected to the two pulling sleeves (310), and the middle part thereof has at least one curved section extending transversely; the wiring (121) passes through the interior of the anti-tensioning piece (300) and is in a retracted state along its shape; the front end of the pulling sleeve (310) located in the front is provided with a pulling block (122) fixedly connected to the wiring (121) both inside and outside.

2. The protective housing with an anti-detachment structure at the motor lead end according to claim 1, characterized in that: The connecting sleeve (210) is made of plastic material, the conductive sleeve (220) is made of copper material and is formed into a round sleeve structure, the wire sleeve assembly (230) is composed of a copper sleeve (231) and a star-shaped spring piece (232) which are sleeved together, the two copper sleeves (231) are sleeved with the lead wire (120) and the wiring (121) respectively, and the star-shaped spring piece (232) is made of conductive metal and is in a closed star-shaped sheet shape.

3. The protective housing with an anti-detachment structure at the motor lead end according to claim 2, wherein: A plurality of sleeve rods (2311) are embedded in the inner end of the copper sleeve (231), the sleeve rods (2311) are extended along the axial direction of the copper sleeve (231) and do not contact the outer side surface of the copper sleeve (231), and the plurality of sleeve rods (2311) are arranged in a ring shape at equal intervals and are sleeved on the outer sides of a plurality of inner recesses of the star-shaped spring piece (232).

4. The protective housing with an anti-detachment structure at the motor lead end according to claim 3, characterized in that: An annular boss is provided in the middle of the inner wall of the conductive sleeve (220), and a plurality of pressure rods (221) are embedded in the front and rear ends of the boss in an annular shape and at equal intervals, the pressure rods (221) not contacting the inner wall of the conductive sleeve (220), and a plurality of the pressure rods (221) are sleeved with the inner sides of a plurality of outer protrusions of the star-shaped spring piece (232).

5. The protective housing with an anti-detachment structure at the motor lead end according to claim 4, characterized in that: The electrical connection piece (200) further comprises a connection sleeve (210), a movable sleeve (240) sleeved with the inner wall of the connection sleeve (210), and a wire sleeve group (230) sleeved inside the rear end of the movable sleeve (240); the copper sleeve (231) in the wire sleeve group (230) sleeves with the lead wire (120), the movable sleeve (240) is made of copper material, and a wire sleeve (241) sleeved with the wire connection (121) is arranged at the center of the front port thereof.

6. The protective housing with an anti-detachment structure at the motor lead end according to claim 5, characterized in that: A plurality of movable spring sheets (242) are provided in a circular shape at equal intervals between the wire sleeve (241) and the front end of the movable sleeve (240); the movable spring sheets (242) are in the shape of bent sheets; and the movable sleeve (240) is entirely made of conductive metal material.

7. The protective housing with an anti-detachment structure at the motor lead end according to claim 6, characterized in that: Both the pulling sleeve (310) and the wire receiving section (320) are composed of a pair of vertical strip-shaped pieces and are made into sheet shapes using spring steel. The pulling sleeve (310) has a U-shaped structure and a sleeve hole (311) is provided on its end face. The connection wire (121) is inserted and slid in the sleeve hole (311). The wire receiving section (320) is S-shaped, and reinforcing pieces (321) are fixedly connected to the upper and lower surfaces at the position opposite to the pulling sleeve (310) in the middle. A sleeve ring (330) that is tightly sleeved on the front end of the connection sleeve (210) is provided at the outer end of the pulling sleeve (310).

8. The protective housing with an anti-detachment structure at the motor lead end according to claim 7, characterized in that: An arc-shaped wire storage section (340) is further included between the two pulling sleeves (310). A plurality of reinforcing strips (341) are provided at equal intervals on the upper and lower surfaces in the middle of the wire storage section (340). The reinforcing strips (341) are horizontally curved.

9. The protective housing with an anti-detachment structure at the motor lead end according to claim 8, characterized in that: A silica gel sleeve (123) is sleeved on the bare wire end of the connection wire (121). The silica gel sleeve (123) is in internal socket fit with the front end of the connection sleeve (210). A pressing piece (140) is sleeved on each row of a plurality of lead ends (110), and a nut is threadedly connected to the lead end (110). A pressing strip (150) is embedded between the tops of two rows of oppositely arranged lead ends (110).

10. A method for protecting a motor lead terminal with an anti-drop structure, using the protective housing with an anti-drop structure for the motor lead terminal according to any one of claims 1 to 9, characterized in that: It includes the following steps: S1. First, the connection sleeve (210) is sleeved into a through hole provided on the front side wall of the installation box (130). S2. Then, the two wire sleeve groups (230) are respectively sleeved into the front and rear ends of the conductive sleeve (220), and the whole is sleeved into the connection sleeve (210) internally. S3. Then, the connection wire (121) and the lead wire (120) are respectively sleeved into the wire sleeve groups (230) at the front and rear. S4. Then, the anti-pulling member (300) is integrally sleeved on the outside of the connection wire (121), and the rear pulling sleeve (310) is fixedly sleeved with the connection sleeve (210). Then, two pairs of pulling blocks (122) are bonded to the upper and lower surfaces of the connection wire (121) at the position of the front pulling sleeve (310). S5. When the vibration generated during the operation of the motor body (100) acts on the lead wire (120) and the wire sleeve group (230), it is buffered, and thus it will not be loosened due to the reaction force of the connection wire (121). S6. When the connection wire (121) is subjected to external extrusion and pulling forces, the anti-pulling member (300) is driven by the pulling block (122) to be flattened as a whole, so as to offset the external force acting on the lead end (110).

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