A type of motor grounding wire

Abstract

This utility model discloses a motor grounding wire, relating to the field of motor grounding wire technology. It includes a grounding wire, two sets of terminals, and a motor grounding screw. One set of terminals has a conductive ring fixed to one side, contacting the motor housing, and a protective cover fixed to its outer side. A sleeve is fixed inside the protective cover. A double-sided bolt is connected to the inner side of the sleeve, with an external thread on the outer side of the double-sided bolt that connects to the sleeve's thread. An internal thread on the inner side of the double-sided bolt connects to the motor grounding screw. The external thread of the double-sided bolt and the sleeve, along with the internal thread and the motor grounding screw, form a double-threaded locking mechanism. The contact ring presses against the motor housing, and the spring is passively compressed, forming a composite structure of rigid connection and elastic fastening. This effectively counteracts the risk of loosening caused by motor vibration. Compared to traditional single-nut connections, the vibration resistance is significantly improved, preventing grounding terminal loosening or detachment caused by vibration and ensuring the effectiveness of grounding protection.

Description

Technical Field

[0001] This utility model relates to the field of motor grounding wire technology, specifically a motor grounding wire. Background Technology

[0002] In modern industrial production and daily life, motors are the core equipment for realizing electromechanical energy conversion, and their safe and stable operation is of paramount importance. The grounding system, as a key link in the electrical safety protection of motors, can effectively conduct leakage current and avoid equipment failure and the risk of electric shock to personnel. At present, the conventional method of connecting motor grounding wires is to install connecting terminals on the motor grounding end and the ground end respectively, and use nuts to tighten and lock the connecting terminals. This method is widely used in the industry because it is simple to operate and has low cost.

[0003] However, in actual operation, the continuous vibration generated by the motor will produce dynamic stress on the connection structure. The connection terminals that are only secured by nuts are prone to loosening under long-term vibration, which will lead to the grounding wire connection terminals and the motor grounding terminals becoming loose or even falling off. This will not only weaken the effectiveness of the motor grounding protection and increase the risk of equipment failure, but may also cause safety accidents such as leakage, posing a potential threat to production safety and the lives and property of personnel. Utility Model Content

[0004] Therefore, the purpose of this utility model is to provide a motor grounding wire to solve the technical problems in the background art mentioned above.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a motor grounding wire, including a grounding wire, two sets of terminals and a motor grounding screw, wherein a conductive ring that contacts the motor housing is fixed on one side of one set of terminals and a protective cover is fixed on its outer side;

[0006] The protective cover has a sleeve fixed inside, and a double-sided bolt is connected to the inner side of the sleeve. The outer side of the double-sided bolt has an external thread that connects with the sleeve thread, and the inner side of the double-sided bolt has an internal thread that connects with the motor grounding screw thread. The wiring terminal and the conductive ring have through holes that cooperate with the motor grounding screw.

[0007] The middle part of the grounding wire is threaded to accommodate different connection lengths. The grounding wire consists of a sheath, a battery cell, and two sets of terminals. One set of terminals contacts the outer casing through a conductive ring, while the other set of terminals is fixedly connected to the ground.

[0008] The protective cover has fixed plates at the triangular part inside. Each set of fixed plates has a guide rod slidably connected inside. Each of the three sets of guide rods has a contact ring fixed on one side. A spring located on the outside of the three sets of guide rods is fixed between the inner side of the contact ring and the three sets of fixed plates. A washer is fixed on the outer end face of the contact ring.

[0009] The bottom of the protective cover is fixed with a connecting sleeve located outside the sheath of the grounding wire. The connecting sleeve protects the connection between the terminal block and the battery cell. Specifically, the connecting sleeve is fixed to the bottom of the protective cover, wraps around the connection between the terminal block and the battery cell, and is sealed with heat-shrinkable material to prevent moisture and oxidation.

[0010] By adopting the above technical solution, the external thread of the double-sided bolt and the sleeve, and the internal thread and the motor grounding screw form a double thread lock. The contact ring presses against the motor housing, and the spring is passively compressed, forming a composite structure of rigid connection and elastic fastening. This effectively offsets the risk of loosening caused by motor vibration. Compared with the traditional single nut connection, the vibration resistance is significantly improved, which can avoid the problem of grounding terminal loosening or falling off due to vibration, and ensure the effectiveness of grounding protection. The rubber ring on the inner side of the protective cover makes flexible contact with the motor housing. Combined with the fully enclosed design of the cover plate and the connecting sleeve, it can isolate moisture and dust from corroding the terminals, extend the service life of the grounding components, and prevent personnel from accidentally touching live parts, thus improving electrical safety performance. The spring force keeps the threaded connection surface continuously and tightly fitted, further enhancing grounding stability. It is suitable for the motor safety grounding requirements in vibration environments.

[0011] Furthermore, a hexagonal hole is provided at the center of one side of the double-sided bolt, a cover plate is provided on the outside of the protective cover to cooperate with it, and a sealing head that cooperates with the hexagonal hole is fixed on the inside of the cover plate. Multiple sets of connecting rods extending into the inside of the protective cover are fixed in a ring on the inside of the cover plate.

[0012] By adopting the above technical solution, the cover plate is fixed to the outside of the protective cover by the connecting rod, and the inner sealing head is embedded in the internal hexagonal hole of the double-sided bolt to prevent foreign objects from entering and accidental human contact.

[0013] Furthermore, a rubber ring is fixed to the inner side of the protective cover.

[0014] By adopting the above technical solution, the rubber ring plays a role in providing flexible contact with the motor housing.

[0015] In summary, this utility model has the following beneficial effects: the external thread of the double-sided bolt and the sleeve, and the internal thread and the motor grounding screw of this utility model form a double thread lock. The contact ring presses against the motor housing, and the spring is passively compressed, forming a composite structure of rigid connection and elastic fastening. This effectively offsets the risk of loosening caused by motor vibration. Compared with the traditional single nut connection, the vibration resistance is significantly improved, which can avoid the problem of grounding terminal loosening and falling off due to vibration, and ensure the effectiveness of grounding protection. The rubber ring on the inner side of the protective cover makes flexible contact with the motor housing. Combined with the fully enclosed design of the cover plate and the connecting sleeve, it can isolate water vapor and dust from corroding the wiring terminals, extend the service life of the grounding component, and prevent personnel from accidentally touching live parts, thus improving electrical safety performance. The spring force keeps the threaded connection surface continuously and tightly fitted, further enhancing the grounding stability. It is suitable for the motor safety grounding requirements in vibration environments. Attached Figure Description

[0016] Figure 1 This is a first-view structural diagram of the entire utility model;

[0017] Figure 2 This is a second-view structural diagram of the entire utility model;

[0018] Figure 3 This is a partially enlarged cross-sectional view of the present invention;

[0019] Figure 4 This is a partially enlarged exploded cross-sectional view of the present invention;

[0020] Figure 5 This is an enlarged view of the structure of the motor wiring terminal of this utility model.

[0021] In the diagram: 1. Grounding wire; 101. Sheath; 102. Battery cell; 103. Terminal block; 2. Conductive ring; 3. Motor grounding screw; 4. Protective cover; 5. Double-sided bolt; 6. Internal thread; 7. Sleeve; 8. External thread; 9. Hexagonal socket; 10. Fixing plate; 11. Contact ring; 12. Guide rod; 13. Spring; 14. Rubber ring; 15. Connecting sleeve; 16. Cover plate; 17. Sealing head; 18. Connecting rod. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0023] The embodiments of this utility model will be described below based on its overall structure.

[0024] Example 1

[0025] like Figure 1-5 As shown, this embodiment revolves around the motor grounding wire, and its structural design focuses on vibration resistance, fastening, and protection. It is mainly composed of grounding wire 1, conductive ring 2, protective cover 4, and double-sided bolts 5.

[0026] The grounding wire 1 is composed of a sheath 101 wrapping the battery cell 102, with terminals 103 crimped at both ends. A conductive ring 2 is fixed to the outside of one terminal 103, which is in contact with the motor housing and conducts electricity. The other terminal 103 is connected to the grounding terminal.

[0027] The inner diameter of the conductive ring 2 is adapted to the motor grounding screw 3. Its inner diameter is in contact with the large diameter surface of the motor grounding screw 3, and the inner end face of the conductive ring 2 is in contact with the motor housing. All surfaces are tin-plated to reduce contact resistance.

[0028] The protective cover 4 is made of insulating engineering plastic and is cylindrical in shape, with an inner fixing sleeve 7 and a rubber ring 14. The rubber ring 14 makes flexible contact with the motor housing, serving to absorb shock and provide a seal.

[0029] The double-sided bolt 5 has an internal hexagonal hole 9 in the middle. The outer external thread 8 is threaded to the sleeve 7, and the inner internal thread 6 is threaded to the motor grounding screw 3, so as to achieve "double thread locking".

[0030] The protective cover 4 has a fixed plate 10 fixed in the triangular position inside. The guide rod 12 passes through the fixed plate 10 and connects to the contact ring 11. A spring 13 is sleeved on the outside. A washer is attached to the outside of the contact ring 11 to press against the motor housing.

[0031] The connecting sleeve 15 is fixed to the bottom of the protective cover 4, covering the connection between the wiring terminal 103 and the battery cell 102, and is sealed with heat-shrinkable material to prevent moisture and oxidation;

[0032] The cover plate 16 is fixed to the outside of the protective cover 4 by the connecting rod 18, and the inner sealing head 17 is embedded in the inner hexagonal hole 9 of the double-sided bolt 5 to prevent foreign objects from entering and accidental human contact.

[0033] Pre-installation preparation

[0034] Clean the surface of the motor grounding screw 3 to ensure it is free of oil and rust. Check the welding quality of the conductive ring 2 and the terminal 103 to ensure continuity of conductivity.

[0035] Grounding connection operation

[0036] Preliminary positioning: Insert the conductive ring 2 into the motor grounding screw 3, so that the rubber ring 14 of the protective cover 4 fits against the motor housing;

[0037] Double-thread fastening: Use an Allen wrench to turn the double-sided bolt 5. First, connect the external thread 8 to the sleeve 7 to fix the protective cover 4 to the motor housing. Continue to screw it in until the internal thread 6 engages with the motor grounding screw 3, so that the conductive ring 2 is tightly pressed against the motor housing. The pitch between the internal thread 6 and the external thread 8 is the same, thereby avoiding jamming when the double-sided thread is connected.

[0038] Sealing and protection: Install the cover plate 16 to ensure that the sealing head 17 is fully embedded in the internal hexagonal hole 9, and the connecting rod 18 is locked with the protective cover 4 to form a closed protective space.

[0039] The working principle of this utility model is as follows: When in use, the grounding wire 1 is composed of a sheath 101, a battery cell 102 and two sets of terminals 103. One side of one set of terminals 103 is connected to a conductive ring 2, which contacts the motor to serve as grounding. The other end of the terminal 103 is connected to the grounding terminal.

[0040] After the terminal 103 with conductive ring 2 is fitted onto the motor grounding screw 3 of the motor, the operator manually applies a certain force. At this time, the contact ring 11 is pressed against the motor housing, and the multiple sets of springs 13 are in a compressed state.

[0041] Then, the staff uses a tool to rotate the internal hexagonal hole 9, so that the double-sided bolt 5 is screwed into the sleeve 7. The external thread 8 on the outside of the double-sided bolt 5 is first threadedly connected to the inside of the sleeve 7. As the screwing depth of the double-sided bolt 5 increases, the internal thread 6 on the inside of the double-sided bolt 5 is threadedly connected to the outside of the motor grounding screw 3. Since the outside of the conductive ring 2 is in contact with the motor housing, the double-sided bolt 5 rotates and thus connects and tightens the terminal 103 and the motor grounding screw 3. At the same time, under the threaded connection between the external thread 8 and the sleeve 7, the protective cover 4 is tightened and connected to the motor grounding screw 3.

[0042] Furthermore, under the restoring force of multiple sets of springs 13, the internal thread 6 of the double-sided bolt 5 and the outer thread, outer thread 8 of the motor grounding screw 3 and the inner thread of the sleeve 7 achieve axial tight engagement.

[0043] As can be seen from the above, the double-sided bolt 5 not only enhances the tightness of the connection between the terminal block 103 and the motor grounding screw 3, thus preventing the terminal block 103 from loosening or even falling off due to vibration caused by motor operation, but also, under the protection of the protective cover 4, it can also cover and protect the grounding connection, thus preventing the terminal block 103 from being damaged by corrosion caused by the external environment.

[0044] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A motor grounding wire comprising a grounding wire (1), two sets of terminal (103) and a motor grounding screw (3), characterized in that: One of the sets of terminals (103) has a conductive ring (2) that contacts the motor housing on one side and a protective cover (4) that is fixed on the outside of it. The protective cover (4) has a sleeve (7) fixed inside. The sleeve (7) is connected to a double-sided bolt (5) on the inside. The double-sided bolt (5) has an external thread (8) that is threaded to the sleeve (7) on the outside. The double-sided bolt (5) has an internal thread (6) that is threaded to the motor grounding screw (3) on the inside. The terminal block (103) and the conductive ring (2) have through holes that cooperate with the motor grounding screw (3).

2. The motor ground wire of claim 1, wherein: The middle part of the grounding wire (1) is threaded, which can be used to adapt to different connection lengths. The grounding wire (1) is composed of a sheath (101), a battery cell (102) and two sets of terminals (103). One set of terminals (103) is in contact with the outer shell through a conductive ring (2), and the other set of terminals (103) is fixedly connected to the ground.

3. The motor ground wire of claim 1, wherein: The protective cover (4) has a fixing plate (10) fixed inside the triangular part. Each set of fixing plates (10) has a guide rod (12) slidably connected inside. Each of the three sets of guide rods (12) has an abutment ring (11) fixed on one side.

4. The motor ground wire of claim 3, wherein: Springs (13) located on the outside of the three sets of guide rods (12) are fixed between the inner side of the contact ring (11) and the three sets of fixing plates (10), and washers are fixed on the outer end face of the contact ring (11).

5. The motor ground wire of claim 1, wherein: The double-sided bolt (5) has an internal hexagonal hole (9) at the center of one side. The protective cover (4) is provided with a cover plate (16) that matches it. The cover plate (16) is fixed with a sealing head (17) that matches the internal hexagonal hole (9) on the inner side. The cover plate (16) is fixed with multiple sets of connecting rods (18) that extend into the interior of the protective cover (4) in a ring on the inner side.

6. The motor ground wire of claim 1, wherein: The bottom of the protective cover (4) is fixed with a connecting sleeve (15) located outside the sheath (101) of the grounding wire (1), and the connecting sleeve (15) plays a protective role at the connection point of the terminal (103) and the battery cell (102).

7. The motor ground wire of claim 1, wherein: A rubber ring (14) is fixed inside the protective cover (4), and the rubber ring (14) serves to make flexible contact with the motor housing.

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