High-voltage control box protection structure

Abstract

The utility model relates to the field of control boxes, and discloses a high-voltage control box protection structure which comprises a protection cover hinged to a shell, a clamping structure arranged between the protection cover and the shell, and an installation structure arranged between the protection cover and the shell. The circular shaft is fixedly arranged on the shell, the shielding sections are arranged at the positions, at the two ends of the circular shaft, of the protective cover, can be in elastic extrusion sliding fit with the ends of the circular shaft, then cross the circular shaft and abut against the lower surface of the circular shaft, and each shielding section is in a circular shape or an arc shape concentric with the circular shaft. A limiting plate is arranged between the two shielding sections on the protective cover in a protruding mode, an arc-shaped groove which is concentric with the circular shaft and allows the circular shaft to be clamped in is formed in the limiting plate in a concave mode, the lower surface of the circular shaft in the protective structure abuts against the shielding sections to limit the protective cover to be separated from the circular shaft upwards, and the upper surface of the circular shaft abuts against the arc-shaped groove to limit the protective cover to be separated from the circular shaft downwards. The shielding section and the arc-shaped groove are both concentric with the circular shaft, and it is guaranteed that the protective cover and the circular shaft are rotationally connected while separation of the protective cover and the circular shaft is limited.

Description

Technical Field

[0001] The utility model relates to the field of control boxes, in particular to a high-voltage control box protection structure. Background Art

[0002] The high-voltage control unit (BDU) is an important part of the battery pack of new energy vehicles. It is used to coordinate the function conversion and energy distribution of high-voltage accessories such as the drive motor control system, battery management system, charging management system, DC / DC, electric air conditioning, electric power steering, and braking system, as well as to achieve safety protection functions such as rapid power-off protection for short-circuit overload and leakage protection. The power battery is input to the high-voltage control box, and the high-voltage connection part where the two are connected must be equipped with a protective structure to prevent direct hand contact according to standard requirements.

[0003] The Chinese patent application with application number 201811179060.9 discloses a battery disconnect unit input and output terminal protective cover and a high-voltage distribution box, including a protective cover, an upper shell, a lower shell, and a battery disconnect unit protective cover. One end of the protective cover is rotatably connected to the upper shell of the distribution box, and the other end is connected to the lower shell of the distribution box through a locking mechanism. A card slot is provided at the connection between the protective cover and the upper shell. The card slot is a C-shaped card slot, which is matched with a cylindrical shaft provided on the upper shell.

[0004] In this solution, external force is applied to the protective cover and the upper shell to drive the outer ring wall of the cylindrical shaft to squeeze and slide against the opening of the C-shaped slot and then embed into the slot, and the cylindrical shaft and the slot rotate in coordination to achieve the hinge connection between the protective cover and the upper shell. However, the C-shaped slot has a weak limiting ability on the cylindrical shaft. When the protective cover is flipped over, a little more force will drive the cylindrical shaft to squeeze and slide against the opening of the C-shaped slot and then detach from the slot, resulting in low safety performance. Utility Model Content

[0005] The utility model aims at the defect in the prior art that a protective cover is easily separated from a shell body and provides a high-voltage control box protective structure.

[0006] In order to solve the above technical problems, the utility model is solved by the following technical solutions:

[0007] A high-voltage control box protective structure comprises a protective cover hingedly arranged on a shell body to expose or shield a high-voltage connection part, a clamping structure is arranged between the protective cover and the shell body to limit the relative rotation of the protective cover and the shell body when the protective cover shields the high-voltage connection part, and a mounting structure is arranged between the protective cover and the shell body to enable the two to be buckled and rotatably connected. The mounting structure comprises a circular shaft fixedly arranged on the shell body and shielding sections respectively arranged at both ends of the circular shaft on the protective cover, which can elastically squeeze and slide with the end of the circular shaft to cross the circular shaft and abut against the lower surface of the circular shaft, the shielding section is circular or arc-shaped concentric with the circular shaft, and a limiting plate is convexly arranged between the two shielding sections on the protective cover, and an arc-shaped groove is concavely arranged on the limiting plate, which is concentric with the circular shaft and for the circular shaft to be clamped and abuts against the upper surface of the circular shaft when the shielding section abuts against the lower surface of the circular shaft.

[0008] With the above scheme, when the protective cover is installed, force is applied to the protective cover to drive it to move downward toward the shell. After the shielding section abuts and squeezes the end of the circular shaft, the external force drives the lower shielding section to deform in the direction away from the circular shaft, so that the shielding section and the end of the circular shaft are squeezed and slid to fit over the end of the circular shaft. After the shielding section passes over the circular shaft, the external force on the shielding section disappears, and the shielding section is restored to its original state and abuts on the lower surface of the circular shaft, limiting the protective cover from detaching upward from the circular shaft. At this time, the upper surface of the circular shaft is inserted into the arc groove and abuts therewith, limiting the protective cover from detaching downward from the circular shaft. The shielding section and the arc groove are both concentrically arranged with the circular shaft, limiting the radial movement of the protective cover and the circular shaft along the circular shaft while ensuring the rotational connection between the protective cover and the circular shaft. The protective cover flips upward to expose the high-voltage connection part, and the protective cover flips downward to block the high-voltage connection part. When the protective cover blocks the high-voltage connection part, the relative rotation of the protective cover is limited by the clamping structure and the shell, thereby ensuring the protective performance of the protective cover.

[0009] Preferably, the bottom of the shielding segment is provided with an introduction slope which gradually slopes upward from the side away from the circular axis to the side close to the circular axis, and the end of the circular axis is provided with a matching slope which cooperates with the introduction slope to drive the shielding segment to deform away from the end of the circular axis.

[0010] By adopting the above scheme, when the protective cover is installed, the guide bevel and the matching bevel are squeezed and slidably matched to ensure that the shielding section can be deformed away from the circular shaft and return to abutment with the lower surface of the circular shaft after passing over the circular shaft.

[0011] Preferably, the clamping structure includes a protrusion protruding from the shell, a mounting plate arranged on the protective cover, and a clamping block protruding from the mounting plate that can squeeze and slide with the protrusion when the protective cover is flipped downward, then pass over the protrusion and abut against the lower bottom surface of the protrusion.

[0012] With the above - mentioned solution, the protective cover is flipped downward until the clamping block and the convex block are in contact and extrusion. Under the action of an external force, the mounting plate deforms in a direction away from the convex block, so that the clamping block and the convex block are in extrusion and sliding fit to cross over the convex block. After the clamping block crosses over the convex block, the external force on the clamping block disappears. After the mounting plate recovers its deformation, it drives the clamping block to abut against the lower bottom surface of the convex block, restricting the upward detachment of the clamping block from the convex block and achieving clamping.

[0013] Preferably, the detachment of the clamping block from the convex block is controlled by an unlocking component. The unlocking component includes a pressing plate with one end extending and suspended on the mounting plate and an avoidance space provided on the housing for the suspended end of the pressing plate to move.

[0014] With the above - mentioned solution, when unlocking, an external force is applied to the pressing plate. The pressing plate deforms into the avoidance space, driving the mounting plate away from the convex block, driving the clamping block to disengage from the convex block, and releasing the clamping.

[0015] Preferably, the upper surface of the convex block is provided with a first inclined surface that gradually slopes downward from near the housing to far from the housing. The lower bottom surface of the clamping block is provided with a second inclined surface that cooperates with the first inclined surface to drive the mounting plate to deform away from the convex block.

[0016] With the above - mentioned solution, when the protective cover is clamped, the first inclined surface and the second inclined surface are in extrusion and sliding fit, ensuring that the mounting plate can deform away from the convex block and return to abut against the lower bottom surface of the convex block after the clamping block crosses over the convex block.

[0017] Preferably, balls that are rotationally arranged on the arc - shaped groove and / or the shielding section and are in rolling fit with the outer ring wall of the circular shaft are provided.

[0018] With the above - mentioned solution, when the protective cover rotates on the circular shaft, the shielding section and the arc - shaped groove are in surface - to - surface contact with the outer ring surface of the circular shaft, with a relatively large frictional force, and the rotation of the protective cover is relatively stuck. By adding balls, the sliding friction is converted into rolling friction, reducing the frictional force and facilitating the rotation of the protective cover.

[0019] Preferably, an oil storage chamber for storing lubricating oil and communicating with the balls is provided inside the protective cover.

[0020] With the above - mentioned solution, the balls rotate to coat the lubricating oil in the oil storage chamber on the outer ring wall of the circular shaft, further reducing the resistance.

[0021] Preferably, an oil - filling structure is provided on the protective cover. The oil - filling structure includes an oil injection port provided on the inner wall of the oil storage chamber and communicating with the outside and a plug that can open or seal the oil injection port.

[0022] With the above - mentioned solution, by opening the plug, lubricating oil can be added to the oil storage chamber through the oil injection port for refueling. After refueling is completed, the oil injection port is sealed with the plug to achieve sealing.

[0023] Due to the adoption of the above technical solutions, the utility model has remarkable technical effects: the lower surface of the circular shaft abuts against the shielding section to limit the upward detachment of the protective cover from the circular shaft, the upper surface of the circular shaft abuts against the arc-shaped groove to limit the downward detachment of the protective cover from the circular shaft, and both the shielding section and the arc-shaped groove are concentrically arranged with the circular shaft, which not only restricts the relative movement of the protective cover and the circular shaft along the radial direction of the circular shaft but also ensures the rotational connection between the protective cover and the circular shaft. Description of the Drawings

[0024] Figure 1 is an axonometric view of a high-voltage control box protection structure in Embodiment 1;

[0025] Figure 2 is a top view of a high-voltage control box protection structure in Embodiment 1;

[0026] Figure 3 is Figure 2 a cross-sectional view taken along line A-A in

[0027] Figure 4 is Figure 3 an enlarged view of B in

[0028] Figure 5 is a front view of a high-voltage control box protection structure in Embodiment 1;

[0029] Figure 6 is Figure 5 a cross-sectional view taken along line C-C in

[0030] Figure 7 is Figure 6 an enlarged view of D in

[0031] Figure 8 is Figure 6 an enlarged view of E in

[0032] Figure 9 is an exploded view of a high-voltage control box protection structure in Embodiment 1;

[0033] Figure 10 is Figure 9 an enlarged view of F in

[0034] Figure 11 is a partial enlarged view of a high-voltage control box protection structure in Embodiment 2.

[0035] The names of the parts referred to by each digital label in the above drawings are as follows: 1. housing; 101. upper housing; 102. lower housing; 2. protective cover; 3. round shaft; 301. mating inclined surface; 4. connecting plate; 5. shielding section; 501. guiding inclined surface; 6. limiting plate; 601. arc-shaped groove; 7. bump; 701. first inclined surface; 8. mounting plate; 9. clamping block; 901. second inclined surface; 10. pressing plate; 11. avoidance space; 12. ball; 13. oil storage chamber; 14. oil injection port; 15. plugging. Specific Embodiment

[0036] The present utility model will be further described in detail below with reference to the drawings and embodiments.

[0037] Embodiment 1

[0038] A protection structure for a high-voltage control box, referring to Figures 1 to 10 , includes a housing 1, the housing 1 includes an upper housing 101 and a lower housing 102 which are fixedly connected, a round shaft 3 is fixedly arranged on the upper housing 101, and both ends of the round shaft 3 are suspended. It further includes a protective cover 2, and the protective cover 2 is rotatably connected to the round shaft 3. A high-voltage connection part is arranged on the lower housing 102. When the protective cover 2 is turned upwards, the high-voltage connection part can be exposed, facilitating the installation or connection of the high-voltage connection part; when the protective cover 2 is turned downwards, the high-voltage connection part can be shielded, preventing the hand from directly contacting the high-voltage connection part and ensuring the use safety. After the protective cover 2 is turned downwards to shield the high-voltage connection part, the protective cover 2 and the lower housing 102 are clamped through a clamping structure, so that the protective cover 2 and the lower housing 102 are relatively stationary.

[0039] The clamping structure includes a bump 7 protruding from the lower housing 102. The upper end surface of the bump 7 gradually slopes downwards from the side close to the lower housing 102 to the side far from the lower housing 102, forming a first inclined surface 701. A mounting plate 8 is arranged on the protective cover 2. A clamping block 9 protrudes from the side of the mounting plate 8 close to the bump 7. The lower bottom surface of the clamping block 9 gradually slopes upwards from the side close to the mounting plate 8 to the side far from the mounting plate 8, forming a second inclined surface 901. After the first inclined surface 701 and the second inclined surface 901 are in extrusion and sliding fit, the mounting plate 8 deforms in the direction away from the lower housing 102 until the clamping block 9 passes over the bump 7, and then the mounting plate 8 returns to its original state and drives the upper end surface of the clamping block 9 to abut against the lower bottom surface of the bump 7 to achieve clamping.

[0040] The upper end surface of the mounting plate 8 extends upwards to be provided with a pressing plate 10. One end of the pressing plate 10 far from the mounting plate 8 is suspended. The lower housing 102 is provided with an avoidance space 11 for the suspended end of the pressing plate 10 to move towards the direction close to the lower housing 102. When the pressing plate 10 moves towards the direction close to the lower housing 102, it drives the mounting plate 8 away from the lower housing 102, driving the clamping block 9 away from the bump 7 to complete the unlocking of the clamping. The pressing plate 10 is provided with anti-slip stripes for increasing the contact friction.

[0041] An installation structure for rotatably connecting the protective cover 2 and the round shaft 3 is provided between them. The installation structure includes connecting plates 4 respectively arranged at both ends of the round shaft 3 on the protective cover 2. A shielding section 5 protrudes upward at one end of the connecting plate 4 close to the end of the round shaft 3. The shielding section 5 is circular or arc-shaped concentric with the round shaft 3, and in this embodiment, it is an arc-shaped opening upward. An introduction inclined surface 501 is arranged at the bottom of the shielding section 5, which slopes gradually upward from the side far from the round shaft 3 to the side close to the round shaft 3. A mating inclined surface 301 is arranged at the end of the round shaft 3, which cooperates with the introduction inclined surface 501 to drive the shielding section 5 to deform away from the end of the round shaft 3. A limiting plate 6 protrudes between the two shielding sections 5 on the protective cover 2. An arc-shaped groove 601 for the round shaft 3 to be inserted into is recessed on the limiting plate 6, and the arc-shaped groove 601 is concentrically arranged with the round shaft 3.

[0042] When the protective cover 2 is installed, the shielding section 5 and the end of the round shaft 3 are aligned. Apply force to the protective cover 2 to drive it to move downward and closer to the upper shell 101. The introduction inclined surface 501 and the mating inclined surface 301 are in extrusion and sliding fit, driving the shielding section 5 and the connecting plate 4 to deform away from the round shaft 3 to ensure that the shielding section 5 crosses over the end of the round shaft 3. After the shielding section 5 crosses over the round shaft 3, the external force on the shielding section 5 disappears. After the shielding section 5 returns to its original state, its inner wall abuts against the lower surface of the round shaft 3, restricting the upward detachment of the protective cover 2 from the round shaft 3. At this time, the upper surface of the round shaft 3 is inserted into the arc-shaped groove 601 and abuts against the inner wall of the arc-shaped groove 601, restricting the downward detachment of the protective cover 2 from the round shaft 3. And both the shielding section 5 and the arc-shaped groove 601 are concentrically arranged with the round shaft 3, restricting the radial detachment of the protective cover 2 and the round shaft 3 along the round shaft 3 while ensuring the rotational connection between the protective cover 2 and the round shaft 3.

[0043] Embodiment 2

[0044] Compared with Embodiment 1, referring to Figure 11 , the difference in this embodiment is that: Ball bearings 12 that are in rolling fit with the outer ring wall of the round shaft 3 are rotatably arranged on the inner walls of the arc-shaped groove 601 and the shielding section 5. An oil storage chamber 13 for storing lubricating oil and communicating with the ball bearings 12 is arranged inside the protective cover 2. An oil injection port 14 communicating with the outside is arranged on the inner wall of the oil storage chamber 13. A plug 15 that can open or seal the oil injection port 14 is arranged on the oil injection port 14.

[0045] Open the plug 15, and the lubricating oil is injected into the oil storage chamber 13 through the oil injection port 14. Then, the plug 15 seals the oil injection port 14. When the protective cover 2 rotates, the ball bearings 12 rotate to coat the lubricating oil in the oil storage chamber 13 on the round shaft 3, reducing friction.

[0046] The above are only the preferred embodiments of the present utility model, and the protection scope of the present utility model is not limited to the above embodiments. All technical solutions falling within the concept of the present utility model belong to the protection scope of the present utility model. It should be noted that for those of ordinary skill in the art, several improvements and refinements made without departing from the principle of the present utility model should also be regarded as within the protection scope of the present utility model.

Claims

1. A protection structure for a high - voltage control box, comprising a protection cover (2) hinged to a housing (1) and capable of exposing or shielding a high - voltage connection part, and a clamping structure is arranged between the protection cover (2) and the housing (1) to limit the relative rotation of the protection cover (2) and the housing (1) after the protection cover (2) shields the high - voltage connection part, characterized in that: An installation structure for buckling and rotatably connecting the protective cover (2) and the housing (1) is provided therebetween. The installation structure includes a circular shaft (3) fixedly provided on the housing (1) and shielding segments (5) respectively provided at both ends of the circular shaft (3) on the protective cover (2), which can elastically squeeze and slide-fit with the end of the circular shaft (3), then cross over the circular shaft (3) and abut against the lower surface of the circular shaft (3). The shielding segments (5) are circular or arc-shaped concentric with the circular shaft (3). A limiting plate (6) is protrudingly provided on the protective cover (2) between the two shielding segments (5). An arc-shaped groove (601) concentric with the circular shaft (3) is recessed on the limiting plate (6) for the circular shaft (3) to be inserted into and abut against the upper surface of the circular shaft (3) when the shielding segment (5) abuts against the lower surface of the circular shaft (3).

2. The protection structure of a high-voltage control box according to claim 1, characterized in that: An introduction inclined surface (501) that gradually slopes upward from the side away from the circular shaft (3) to the side close to the circular shaft (3) is provided at the bottom of the shielding segment (5). A mating inclined surface (301) that cooperates with the introduction inclined surface (501) to drive the shielding segment (5) to deform away from the end of the circular shaft (3) is provided at the end of the circular shaft (3).

3. The protection structure of a high-voltage control box according to claim 1, characterized in that: The clamping structure includes a convex block (7) protrudingly provided on the housing (1), a mounting plate (8) provided on the protective cover (2), and a clamping block (9) protrudingly provided on the mounting plate (8), which can elastically squeeze and slide-fit with the convex block (7) when the protective cover (2) is turned downward, then cross over the convex block (7) and abut against the lower bottom surface of the convex block (7).

4. A protection structure for a high-voltage control box according to claim 3, characterized in that: The separation of the clamping block (9) from the convex block (7) is controlled by an unlocking component. The unlocking component includes a pressing plate (10) with one end suspended and extending on the mounting plate (8) and an avoidance space (11) provided on the housing (1) for the suspended end of the pressing plate (10) to move.

5. The protection structure of a high-voltage control box according to claim 3, characterized in that: A first inclined surface (701) that gradually slopes downward from the side close to the housing (1) to the side away from the housing (1) is provided on the upper surface of the convex block (7). A second inclined surface (901) that cooperates with the first inclined surface (701) to drive the mounting plate (8) to deform away from the convex block (7) is provided on the lower bottom surface of the clamping block (9).

6. The protection structure of a high-voltage control box according to claim 1, characterized in that: A ball (12) that rolls on the outer wall of the circular shaft (3) is rotatably provided on the arc-shaped groove (601) and / or the shielding segment (5).

7. A protection structure for a high-voltage control box according to claim 6, characterized in that: An oil storage chamber (13) for storing lubricating oil and communicating with the ball (12) is provided inside the protective cover (2).

8. The protection structure of a high-voltage control box according to claim 7, wherein: An oil filling structure is provided on the protective cover (2). The oil filling structure includes an oil filling port (14) provided on the inner wall of the oil storage chamber (13) and communicating with the outside and a plug (15) that can open or seal the oil filling port (14).

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