A protective mechanism for a motor junction box

Abstract

The utility model discloses a protective mechanism for a motor junction box, and relates to the technical field of motor junction boxes, including an explosion-proof junction box composed of a box body and a box cover, and a quick-install assembly, wherein the quick-install assembly is used to realize the rapid fixation of the box cover and the box body; the quick-install assembly includes a clamping unit, a sealing unit, and a reinforcement unit; the clamping unit is used to limit the box cover and the box body in the up and down directions; the sealing unit is used to realize the sealing protection of the fitting surface of the box cover and the box body; the reinforcement unit is used to limit the rotation direction of the box cover and the box body, and cooperates with the clamping unit to realize the stable fixation of the box cover and the box body. The utility model can realize the rapid installation and fixation of the box cover and the box body by setting a quick-install assembly. Compared with the traditional structure fixed by multiple bolts, not only the installation efficiency is faster, but also the situation that the gap is caused by the different tightening degrees of multiple bolts can be avoided, and the installation sealing of the box cover and the box body can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motor junction boxes, in particular to a protection mechanism for a motor junction box. Background Art

[0002] The motor junction box is a supporting device for the motor. It is mainly used to connect the internal circuit of the motor to the junction box outside the motor. It is connected to the external power supply through the junction box to facilitate the assembly of the motor and to facilitate maintenance when there is a problem with the circuit.

[0003] There are many types of motor junction boxes, one of which is an explosion-proof junction box. The explosion-proof junction box is mainly used to separate the electrical parts of the motor that may generate sparks, arcs and dangerous temperatures from the surrounding explosive gas mixture. The explosion-proof junction box is a connection device with explosion-proof and strong sealing properties. From the appearance, it is a closed box. When the lead wire passes through the outlet hole on the explosion-proof junction box, the rubber sealing ring inside the outlet hole is squeezed to make the rubber sealing ring fit tightly to the outside of the lead wire and the inner wall of the outlet hole, so that the inner cavity of the explosion-proof junction box maintains good sealing;

[0004] The box cover and the box body of the explosion-proof junction box are fastened by multiple bolts. During the actual disassembly and assembly process, multiple bolts need to be tightened or loosened, which not only affects the disassembly and assembly efficiency, but also easily causes a gap between the box cover and the box body due to the different tightening states of the multiple bolts, which is not conducive to the sealing of the explosion-proof junction box. Based on this, a protective mechanism for a motor junction box is provided. Utility Model Content

[0005] The purpose of the utility model is to provide a protection mechanism for a motor junction box in order to solve the above-mentioned problems.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a protection mechanism for a motor junction box, comprising an explosion-proof junction box composed of a box body and a box cover, wherein a quick-install component is arranged between the box body and the box cover, and the quick-install component is used to realize the rapid fixing of the box cover and the box body;

[0007] The quick-install assembly includes a clamping unit, a sealing unit, and a reinforcement unit;

[0008] The clamping unit is used to limit the box cover and the box body in the up and down directions;

[0009] The sealing unit is used to achieve sealing protection between the contact surface between the box cover and the box body;

[0010] The reinforcement unit is used to limit the rotation direction of the box cover and the box body, and cooperates with the clamping unit to achieve a stable fixation of the box cover and the box body.

[0011] As a further solution of the utility model: the clamping unit includes a docking groove, an arc-shaped pressure block, a limit block, and an L-shaped clamping block;

[0012] The docking groove is opened at the top of the edge of the box body and passes through the bottom of the edge, the arc-shaped pressing block is fixed to the bottom of the edge of the box body and distributed on one side of the docking groove, and the limit block is fixed to the bottom of the edge of the box body and is located on the side of the arc-shaped pressing block away from the docking groove;

[0013] The L-shaped clamping block is fixed to the bottom of the edge of the box body. When the box cover is closed on the top of the box body, the lateral part of the L-shaped clamping block moves to the bottom of the edge of the box body through the docking groove, and then the lateral part of the L-shaped clamping block is rotated to the bottom of the arc-shaped pressing block by rotating the box cover to realize the clamping and fixing of the box cover and the box body. The limit block is used to limit the deflection of the L-shaped clamping block.

[0014] As a further solution of the utility model: the sealing unit includes an annular groove and a sealing ring;

[0015] The annular groove is formed at the top of the edge of the box body, and the sealing ring is clamped on the inner side of the annular groove;

[0016] The bottom of one end of the arc-shaped pressing block close to the docking groove is an arc-shaped structure. When the L-shaped clamping block deflects from the docking groove position to the bottom of the docking groove, the L-shaped clamping block drives the box cover to move downward to squeeze the sealing ring to deform and shrink, and the sealing ring is used to fill the gap at the joint between the box cover and the box body.

[0017] As a further solution of the utility model: the outer diameter of the edge of the box body is greater than the outer diameter of the edge of the box cover, and multiple groups of the clamping units are provided, and the multiple groups of the clamping units are circumferentially distributed on the edges of the box body and the box cover.

[0018] As a further solution of the utility model: the explosion-proof junction box also includes a wire tube, a connection block, a sealing groove, a sealing rubber ring, a metal pressing sheet, a crimping cylinder, a connection seat, a notch groove and a clamping sheet;

[0019] The wire tube is fixed to one side of the outside of the box body and is in communication with the inner cavity of the box body. The sealing groove is provided on the side of the wire tube away from the box body. The sealing rubber ring and the metal pressing sheet are sequentially installed on the inner side of the sealing groove.

[0020] The connection block is symmetrically fixed to the outside of the wire tube, the connection seat is fixed to the outside of the crimping cylinder, one side of the crimping cylinder is inserted into the sealing groove and fits the metal pressing sheet, and the connection block and the connection seat are fixedly connected by screws;

[0021] The notch groove is integrally formed on the end surface of the crimping cylinder away from the metal pressing plate, and the clamping plate is fixedly installed on the inner side of the notch groove by screws for clamping the external wire.

[0022] As a further solution of the utility model: the reinforcement unit includes an L-shaped fixing arm and a positioning hole;

[0023] The L-shaped fixing arm is fixed to the outer side of the edge of the box cover, and the positioning hole is opened in the vertical part of the L-shaped fixing arm;

[0024] When the box cover and the box body are fixed together, the vertical part of the L-shaped fixing arm is located in front of the wire tube and the positioning hole is aligned with the sealing groove. The crimping cylinder passes through the positioning hole and is inserted into the sealing groove to achieve rotation locking of the box cover.

[0025] As a further solution of the utility model: the inner diameters of the positioning hole and the sealing groove match the outer diameter of the crimping cylinder, and the inner diameters of the sealing rubber ring, the metal pressing sheet and the crimping cylinder are larger than the outer diameter of the externally connected wire.

[0026] Compared with the prior art, the beneficial effects of the utility model are:

[0027] By setting up a quick-release assembly, the box cover and the box body can be quickly installed and fixed. Compared with the traditional structure of fixing with multiple bolts, not only is the installation efficiency faster, but it can also avoid the situation where gaps are caused by the different tightening degrees of multiple bolts, effectively improving the installation sealing of the box cover and the box body. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the utility model;

[0029] Figure 2 This is a structural breakdown diagram of the utility model;

[0030] Figure 3 This is another perspective view of the utility model in a disassembled state.

[0031] In the figure: 1. explosion-proof junction box; 101. box body; 102. box cover; 103. wire tube; 104. connection block; 105. sealing groove; 106. sealing rubber ring; 107. metal pressing piece; 108. crimping cylinder; 109. connection seat; 110. notched groove; 111. clamping piece; 2. quick-release assembly; 201. docking groove; 202. arc-shaped pressing block; 203. limit block; 204. L-shaped clamping block; 205. annular groove; 206. sealing ring; 207. L-shaped fixing arm; 208. positioning hole. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] See also Figures 1 to 3 In an embodiment of the utility model, a protective mechanism of a motor junction box includes an explosion-proof junction box 1 composed of a box body 101 and a box cover 102, a quick-install component 2 is provided between the box body 101 and the box cover 102, and the quick-install component 2 is used to realize the rapid fixation of the box cover 102 and the box body 101;

[0034] The quick-install assembly 2 includes a snap-on unit, a sealing unit, and a reinforcement unit. The snap-on unit is used to limit the box cover 102 and the box body 101 in the up-down direction. The sealing unit is used to achieve sealing protection of the contact surface between the box cover 102 and the box body 101. The reinforcement unit is used to limit the rotation direction of the box cover 102 and the box body 101, and cooperates with the snap-on unit to achieve a firm fixation of the box cover 102 and the box body 101.

[0035] The clamping unit includes a docking groove 201, an arc-shaped pressing block 202, a limiting block 203, and an L-shaped clamping block 204;

[0036] The docking groove 201 is opened at the top of the edge of the box body 101 and passes through the bottom of the edge. The arc-shaped pressing block 202 is fixed to the bottom of the edge of the box body 101 and distributed on one side of the docking groove 201. The limiting block 203 is fixed to the bottom of the edge of the box body 101 and is located on the side of the arc-shaped pressing block 202 away from the docking groove 201.

[0037] The L-shaped clamping block 204 is fixed to the bottom of the edge of the box body 101. When the box cover 102 is closed on the top of the box body 101, the lateral part of the L-shaped clamping block 204 moves to the bottom of the edge of the box body 101 through the docking groove 201, and then the lateral part of the L-shaped clamping block 204 is rotated to the bottom of the arc-shaped pressing block 202 by rotating the box cover 102 to realize the clamping and fixing of the box cover 102 and the box body 101. The limit block 203 is used to limit the deflection of the L-shaped clamping block 204.

[0038] The sealing unit includes an annular groove 205 and a sealing ring 206;

[0039] The annular groove 205 is formed at the top of the edge of the box body 101, and the sealing ring 206 is clamped on the inner side of the annular groove 205;

[0040] The bottom of one end of the arc-shaped pressing block 202 close to the docking groove 201 is in an arc surface structure. When the L-shaped clamping block 204 deflects from the docking groove 201 to the bottom of the docking groove 201, the L-shaped clamping block 204 drives the box cover 102 to move downward and squeeze the sealing ring 206 to deform and shrink. The sealing ring 206 is used to fill the gap at the joint of the box cover 102 and the box body 101.

[0041] The outer diameter of the edge of the box body 101 is greater than the outer diameter of the edge of the box cover 102 . There are multiple groups of snap-in units, which are circumferentially distributed on the edges of the box body 101 and the box cover 102 .

[0042] In this embodiment, when installing the explosion-proof junction box 1, the installation steps of the box cover 102 and the box body 101 are as follows:

[0043] Align the L-shaped clamping block 204 on the box cover 102 with the docking groove 201 on the box body 101 and insert it so that the lateral part of the L-shaped clamping block 204 moves down to below the edge of the box body 101. At this time, the lower surface of the box cover 102 contacts the sealing ring 206.

[0044] Then, the box cover 102 is rotated to make the L-shaped clamping block 204 rotate toward the arc-shaped pressing block 202, and the top of the horizontal part of the L-shaped clamping block 204 is squeezed with the lower surface of the arc-shaped pressing block 202, so that the L-shaped clamping block 204 moves downward while rotating, that is, the box cover 102 also moves downward synchronously to squeeze the sealing ring 206 to deform. When the L-shaped clamping block 204 contacts the limiting block 203, the box cover 102 and the box body 101 are completely clamped and fixed, and the sealing ring 206 completely fills the gap between the box cover 102 and the box body 101.

[0045] Compared with the traditional structure of fixing with multiple bolts, not only is the installation efficiency faster, but it can also avoid the situation where gaps are caused by different tightening degrees of multiple bolts, and effectively improve the installation sealing of the box cover 102 and the box body 101.

[0046] Please refer to Figures 1 to 3 The explosion-proof junction box 1 further includes a wire tube 103, a connection block 104, a sealing groove 105, a sealing rubber ring 106, a metal pressing sheet 107, a crimping cylinder 108, a connection seat 109, a notch groove 110 and a clamping sheet 111;

[0047] The wire tube 103 is fixed to one side of the outer part of the box body 101 and is in communication with the inner cavity of the box body 101. The sealing groove 105 is provided on the side of the wire tube 103 away from the box body 101. The sealing rubber ring 106 and the metal pressing sheet 107 are sequentially installed on the inner side of the sealing groove 105.

[0048] The connection block 104 is symmetrically fixed to the outside of the wire tube 103, and the connection seat 109 is fixed to the outside of the crimping cylinder 108. One side of the crimping cylinder 108 is inserted into the sealing groove 105 and fits the metal pressing sheet 107. The connection block 104 and the connection seat 109 are fixedly connected by screws.

[0049] The notch groove 110 is integrally formed on the end surface of the crimping cylinder 108 away from the metal pressing plate 107, and the clamping plate 111 is fixedly installed on the inner side of the notch groove 110 by screws for clamping the external wire;

[0050] The reinforcement unit includes an L-shaped fixing arm 207 and a positioning hole 208;

[0051] The L-shaped fixing arm 207 is fixed to the outer side of the edge of the box cover 102, and the positioning hole 208 is opened in the vertical part of the L-shaped fixing arm 207;

[0052] When the box cover 102 and the box body 101 are fixed by clamping, the vertical part of the L-shaped fixing arm 207 is located in front of the wire tube 103 and the positioning hole 208 is aligned with the sealing groove 105. The crimping cylinder 108 passes through the positioning hole 208 and is inserted into the sealing groove 105 to realize the rotation locking of the box cover 102;

[0053] The inner diameters of the positioning hole 208 and the sealing groove 105 match the outer diameter of the crimping cylinder 108 , and the inner diameters of the sealing rubber ring 106 , the metal pressing sheet 107 , and the crimping cylinder 108 are larger than the outer diameter of the externally connected wire.

[0054] In this embodiment: before the box cover 102 is installed, its external wire passes through the clamping cylinder 108, the positioning hole 208 on the L-shaped fixing arm 207, the metal pressing plate 107, the sealing rubber ring 106, and the wire tube 103 in sequence to enter the box body 101. After the end of the external wire is installed and fixed inside the box body 101, the sealing rubber ring 106 and the metal pressing plate 107 are inserted into the sealing groove 105;

[0055] Then, the box cover 102 is installed. After the box cover 102 is installed, its positioning hole 208 is aligned with the central axis of the sealing groove 105. At this time, the clamping column 108 is passed through the positioning hole 208 and inserted into the sealing groove 105. Then, the connection block 104 and the connection seat 109 are fastened and fixed by bolts (it should be noted that: the connection block 104 and the connection seat 109 are provided with through holes for the bolts to pass through). In this way, the position of the clamping column 108 is fixed and the metal pressing plate 107 is squeezed. The metal pressing plate 107 squeezes the sealing rubber ring 106 to deform, so that the inner diameter of the sealing rubber ring 106 shrinks and fits the outer wall of the external wire, and the outer diameter of the sealing rubber ring 106 expands and fits tightly with the inner wall of the sealing groove 105, thereby achieving sealing at the installation location of the external wire. Finally, the clamping plate 111 is fixed to the inner side of the notch groove 110 by bolts, so that the clamping plate 111 fits tightly to the external wire, thereby achieving the clamping operation of the external wire.

[0056] At the same time, the position of the L-shaped fixing arm 207 can be fixed by fixing the position of the compression cylinder 108, so that the box cover 102 cannot be deflected, thereby ensuring the stability of the clamping and fixing state of the box cover 102 and the box body 101.

[0057] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A protection mechanism for a motor junction box, comprising an explosion-proof junction box (1) consisting of a box body (101) and a box cover (102), characterized in that: A quick-install component (2) is provided between the box body (101) and the box cover (102), and the quick-install component (2) is used to achieve quick fixation of the box cover (102) and the box body (101); The quick-install assembly (2) comprises a clamping unit, a sealing unit, and a reinforcement unit; The clamping unit is used to limit the box cover (102) and the box body (101) in the up and down directions; The sealing unit is used to achieve sealing protection of the contact surface between the box cover (102) and the box body (101); The reinforcement unit is used to limit the rotation direction of the box cover (102) and the box body (101), and cooperates with the clamping unit to achieve stable fixation of the box cover (102) and the box body (101).

2. The protection mechanism of a motor junction box according to claim 1, characterized in that: The clamping unit comprises a docking groove (201), an arc-shaped pressing block (202), a limiting block (203), and an L-shaped clamping block (204); The docking groove (201) is opened at the top of the edge of the box body (101) and passes through the bottom of the edge; the arc-shaped pressing block (202) is fixed to the bottom of the edge of the box body (101) and distributed on one side of the docking groove (201); and the limit block (203) is fixed to the bottom of the edge of the box body (101) and is located on a side of the arc-shaped pressing block (202) away from the docking groove (201); The L-shaped clamping block (204) is fixed to the bottom of the edge of the box body (101); when the box cover (102) is covered on the top of the box body (101), the lateral part of the L-shaped clamping block (204) moves to the bottom of the edge of the box body (101) through the docking groove (201); then, by rotating the box cover (102), the lateral part of the L-shaped clamping block (204) is rotated to the bottom of the arc-shaped pressing block (202) to realize the clamping and fixing of the box cover (102) and the box body (101); the limiting block (203) is used to limit the deflection of the L-shaped clamping block (204).

3. The protection mechanism of the motor junction box according to claim 2, characterized in that: The sealing unit comprises an annular groove (205) and a sealing ring (206); The annular groove (205) is formed at the top of the edge of the box body (101), and the sealing ring (206) is clamped on the inner side of the annular groove (205); The bottom of one end of the arc-shaped pressing block (202) close to the docking groove (201) is in an arc-shaped structure. When the L-shaped clamping block (204) deflects from the docking groove (201) to the bottom of the docking groove (201), the L-shaped clamping block (204) drives the box cover (102) to move downward to squeeze the sealing ring (206) to deform and shrink, and the sealing ring (206) is used to fill the gap at the joint between the box cover (102) and the box body (101).

4. The protection mechanism of a motor junction box according to claim 2, characterized in that: The outer diameter of the edge of the box body (101) is greater than the outer diameter of the edge of the box cover (102), and the clamping units are provided in multiple groups, and the multiple groups of clamping units are circumferentially distributed on the edges of the box body (101) and the box cover (102).

5. The protection mechanism of the motor junction box according to claim 1, characterized in that: The explosion-proof junction box (1) further comprises a wire tube (103), a connection block (104), a sealing groove (105), a sealing rubber ring (106), a metal pressing sheet (107), a crimping cylinder (108), a connection seat (109), a notch groove (110) and a clamping sheet (111); The wire tube (103) is fixed to one side of the outside of the box body (101) and is in communication with the inner cavity of the box body (101); the sealing groove (105) is provided on the side of the wire tube (103) away from the box body (101); the sealing rubber ring (106) and the metal pressing sheet (107) are sequentially installed on the inner side of the sealing groove (105); The connection block (104) is symmetrically fixed to the outside of the wire tube (103), the connection seat (109) is fixed to the outside of the crimping cylinder (108), one side of the crimping cylinder (108) is inserted into the sealing groove (105) and fits with the metal pressing sheet (107), and the connection block (104) and the connection seat (109) are fixedly connected by screws; The notch groove (110) is integrally formed on the end surface of the crimping cylinder (108) away from the metal pressing plate (107), and the clamping plate (111) is fixedly installed on the inner side of the notch groove (110) by means of screws, and is used to clamp the external wire.

6. The protection mechanism of the motor junction box according to claim 5, characterized in that: The reinforcement unit comprises an L-shaped fixing arm (207) and a positioning hole (208); The L-shaped fixing arm (207) is fixed to the outer side of the edge of the box cover (102), and the positioning hole (208) is opened in the vertical part of the L-shaped fixing arm (207); When the box cover (102) and the box body (101) are fixed by snap connection, the vertical portion of the L-shaped fixing arm (207) is located in front of the wire tube (103) and the positioning hole (208) is aligned with the sealing groove (105). The crimping cylinder (108) passes through the positioning hole (208) and is inserted into the sealing groove (105) to achieve rotation locking of the box cover (102).

7. The protection mechanism of the motor junction box according to claim 6, characterized in that: The inner diameters of the positioning hole (208) and the sealing groove (105) match the outer diameter of the crimping cylinder (108), and the inner diameters of the sealing rubber ring (106), the metal pressing sheet (107), and the crimping cylinder (108) are larger than the outer diameter of the externally connected wire.

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