Telescopic control mechanism for plugging opening of middle cover

Abstract

The telescopic control mechanism comprises a supporting base, a vertical frame which vertically extends upwards is arranged on the supporting base, a lifting plate is installed on the vertical frame in an up-down sliding mode, a pressing plate is fixedly connected to the lifting plate, and the pressing plate is used for blocking the opening of the middle cover on the upper portion of a battery box body. A cylinder body and a cylinder rod telescopically mounted in the cylinder body are fixedly arranged on the supporting base, a mounting seat is arranged on one side of the lifting plate, a connecting through hole is formed in the upper portion of the cylinder rod and rotationally connected with the mounting seat through a rotating shaft, and the center line of the rotating shaft is perpendicular to the vertical sliding direction of the lifting plate. The lifting mechanism has the advantages that parallelism errors between the air cylinder rod and the lifting plate can be absorbed, and smoothness of lifting driving is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of airtightness detection of batteries for new energy vehicles, and in particular to a telescopic control mechanism for sealing an opening of a middle cover. Background Art

[0002] At present, the mainstream power battery box technology in the new energy vehicle market is the CTP structure, which means that the integration from the battery cell to the box omits the intermediate module link, that is, a module-free power battery. The cost of this structure battery pack is relatively high. In order to reduce the manufacturing cost of the whole vehicle, a CTC structure battery pack structure came into being. This structure further combines the upper cover of the battery box and the body floor into one, further reduces parts, simplifies production steps, and reduces costs while increasing battery capacity and endurance. As the power source of the whole vehicle, the air tightness of the battery pack of new energy vehicles directly affects the safety of the whole vehicle. Therefore, it is very important to detect the air tightness of the battery pack.

[0003] In terms of physical structure, the battery case of the CTC structure includes a middle cover opening at the top and a main body opening at the bottom. The open end of the middle cover has a circumferentially thin edge structure. When performing airtightness testing, it is necessary to block the upper and lower open ends, and then inflate the air into the enclosed space for testing. In the prior art, the airtightness test of the battery case is usually performed by manual operation, and such a testing method has the defects of low testing efficiency and poor testing quality. In view of this, the applicant intends to develop an airtightness testing tool for a CTC structure battery case, which can realize automated testing, wherein the middle cover opening needs to be blocked downward by a pressure plate, and the pressure plate is driven up and down by a cylinder-driven lifting plate. However, due to the existence of errors in component processing, manufacturing and assembly, it is difficult to ensure that the center line of the cylinder rod is completely and absolutely parallel to the sliding track of the lifting plate. This will inevitably affect the smoothness of the cylinder lifting drive, thereby reducing the sealing effect of the pressure plate on the middle cover opening. Utility Model Content

[0004] In view of this, the utility model provides a telescopic control mechanism for sealing the opening of the middle cover, which can absorb the parallelism error between the cylinder rod and the lifting plate, thereby ensuring the smoothness of the lifting drive.

[0005] To achieve the above purpose, the technical solution of the utility model is as follows:

[0006] A telescopic control mechanism for sealing the middle cover opening, the key of which is that it includes a support base, a vertical frame extending vertically upward is provided on the support base, a lifting plate is slidably mounted on the vertical frame, a pressing plate is fixedly connected to the lifting plate, and the pressing plate is used to seal the middle cover opening on the upper part of the battery box;

[0007] A cylinder body and a cylinder rod telescopically installed in the cylinder body are fixedly provided on the support base, a mounting seat is provided on one side of the lifting plate, a connecting through hole is provided on the upper part of the cylinder rod, the connecting through hole is rotatably connected to the mounting seat through a rotating shaft, and the center line of the rotating shaft is perpendicular to the up and down sliding direction of the lifting plate.

[0008] With the above structure, since the cylinder rod and the lifting plate are connected in a rotating manner, even if there are manufacturing or assembly errors, the rotating connection structure there can eliminate the parallelism error between the axial direction of the cylinder rod and the sliding direction of the lifting plate, so that the center line of the cylinder rod always remains parallel to the movement trajectory of the lifting plate, ensuring that there is no up and down swing when the lifting plate moves up and down, thereby ensuring the smoothness of the up and down extension and retraction of the cylinder rod.

[0009] Preferably, a bearing is provided between the connecting through hole and the rotating shaft, and the connecting through hole and the bearing are rotatably connected in a ball joint manner.

[0010] Preferably, a friction sleeve is provided between the connecting through hole and the bearing.

[0011] Preferably, the stand is provided with a guide rail extending in the height direction, a slider is slidably connected to the guide rail, and one side of the lifting plate is fixedly connected to the slider.

[0012] Preferably, a limit block extending outward is provided at the lower part of the stand, and the limit block is used to limit the downward movement distance of the lifting plate. A buffer structure is provided between the limit block and the lower end of the lifting plate, and the buffer structure is used to mitigate the impact of the lifting plate on the limit block.

[0013] Preferably, the buffer structure includes an elastic component and a connecting column vertically passing through the limit block, the connecting column can move up and down relative to the limit block, a cap is provided on the upper end of the connecting column, the elastic component is sleeved on the connecting column, one end of the elastic component abuts against the lower surface of the cap, and the other end abuts against the upper surface of the limit block.

[0014] Preferably, a supporting beam is provided on one side of the lifting plate opposite to the pressing plate, the supporting beam is perpendicular to the lifting plate and extends outward, and the lower end of the supporting beam is fixedly connected to the upper surface of the pressing plate.

[0015] Preferably, the number of the vertical frames is two groups, the two groups of the vertical frames are respectively installed at the two ends of the support base in the width direction, and the cylinder body and the cylinder rod are arranged between the two groups of vertical frames.

[0016] Preferably, a groove is provided on the circumferential edge of the lower side of the pressing plate, and a sealing strip is fixedly embedded in the groove.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1. The telescopic control mechanism for sealing the middle cover opening provided by the utility model is adopted. Since the cylinder rod and the lifting plate are connected in a rotating manner, even if there are manufacturing or assembly errors, the rotating connection structure therein can eliminate the parallelism error between the axial direction of the cylinder rod and the sliding direction of the lifting plate, so that the center line of the cylinder rod always remains parallel to the movement trajectory of the lifting plate, ensuring that there is no up and down swing when the lifting plate moves up and down, thereby ensuring the smoothness of the up and down extension and contraction of the cylinder rod, that is, ensuring the smoothness of the up and down sliding of the pressure plate, so that the pressure plate can act more evenly on the middle cover opening of the battery box, thereby improving the sealing effect of the pressure plate on the middle cover opening.

[0019] 2. The telescopic control mechanism provided by the utility model for sealing the middle cover opening is adopted. The connecting through hole and the bearing are rotatably connected in a ball joint manner, which can not only absorb the up and down swing of the lifting plate, but also absorb the left and right swing of the lifting plate, further improving the smoothness of the operation of the lifting drive mechanism.

[0020] 3. By setting up a buffer structure, the impact of the lifting plate on the limit block when it moves to the extreme position can be reduced, avoiding hard collision between the two components, ensuring the feasibility and safety of the mechanism, and on the other hand, optimizing the pressing impact force of the pressure plate on the opening of the middle cover, avoiding deformation of the middle cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A reference diagram of the telescopic control mechanism in use;

[0022] Figure 2 for Figure 1 A partial enlarged view of point D in the middle;

[0023] Figure 3 is a cross-sectional view of a telescopic control mechanism;

[0024] Figure 4 A schematic diagram showing the rear structure of the telescopic control mechanism;

[0025] Figure 5 for Figure 4 A partial enlarged view of point F in the middle;

[0026] Figure 6 A three-dimensional cross-sectional view showing the connection relationship between the cylinder rod 5 and the bearing 8;

[0027] Figure 7 for Figure 6 A partial enlarged view of point E in the middle. DETAILED DESCRIPTION

[0028] The utility model is further described below in conjunction with embodiments and drawings.

[0029] like Figure 1 As shown, an airtight testing tool A for a CTC structure battery box is installed on the airtight testing tool A. The battery box B to be tested has a middle cover opening B1 at the upper end. During the test, the middle cover opening B1 needs to be sealed with a pressing plate 4. The telescopic control mechanism for sealing the middle cover opening provided in this embodiment is used to control the up and down movement of the pressing plate 4.

[0030] Please refer to Figure 2 and 4 A telescopic control mechanism for sealing the middle cover opening includes a support base 1, a vertical frame 2 extending upward is provided on the support base 1, a lifting plate 3 is slidably mounted on the vertical frame 2, a pressing plate 4 is fixedly connected to the lifting plate 3, and the pressing plate 4 is used to seal the middle cover opening B1 on the upper part of the battery box. Figure 3 It can be seen that in this embodiment, a groove 41 is provided at the circumferential edge of the lower side of the pressing plate 4, and a sealing strip b is fixedly embedded in the groove 41. When the pressing plate 4 is pressed on the middle cover opening B1, the sealing strip b can seal the circumferential edge of the middle cover opening B1. A cylinder body 6 and a cylinder rod 5 telescopically installed in the cylinder body 6 are fixed on the support base 1, and a mounting seat 7 is fixed on the rear side of the lifting plate 3. A connecting through hole 51 is provided on the upper part of the cylinder rod 5. The connecting through hole 51 is rotatably connected to the mounting seat 7 through a rotating shaft a. In this embodiment, the center line of the rotating shaft a is perpendicular to the up and down sliding direction of the lifting plate 3.

[0031] Based on the above structural design, the working principle of the telescopic control mechanism is as follows: the cylinder body 6 drives the cylinder rod 5 to move downward, driving the lifting plate 3 to slide downward along the height direction of the stand 2, thereby driving the pressing plate 4 to press downward on the middle cover opening B1. Since the cylinder rod 5 and the lifting plate 3 are connected in a rotating manner, the up and down swing of the lifting plate 3 can be absorbed, and the parallelism error between the cylinder rod 5 and the lifting plate 3 can be eliminated, so that the center line of the cylinder rod 5 is always parallel to the movement trajectory of the lifting plate 3, thereby ensuring the smoothness of the up and down extension of the cylinder rod 5, that is, ensuring the smoothness of the up and down sliding of the pressing plate 4, so that the pressing plate 4 can act more evenly on the middle cover opening B1 of the battery box B, thereby improving the sealing effect of the pressing plate 4 on the middle cover opening B1.

[0032] like Figure 2 and 3 As shown, in this embodiment, a guide rail 21 extending in the height direction is provided on the front side of the stand 2, a slider 22 is slidably connected to the guide rail 21, and the rear side of the lifting plate 3 is fixedly connected to the slider 22.

[0033] Re-attend Figure 6 and 7A bearing 8 is provided between the connecting through hole 51 and the rotating shaft a, and the connecting through hole 51 and the bearing 8 are rotatably connected in a ball joint manner. In this embodiment, the surface of the bearing 8 is a spherical structure, and the inner wall of the connecting through hole 51 is adapted to the structure of the bearing 8. Such a structural design can not only absorb the up and down swing of the lifting plate 3, but also absorb the left and right swing of the lifting plate 3, further ensuring the parallelism between the center line of the cylinder rod 5 and the sliding track of the lifting plate 3, making the operation of the telescopic control mechanism smoother.

[0034] Further, by Figure 7 It can be seen that a friction sleeve c is provided between the connecting through hole 51 and the bearing 8, and the friction sleeve c protects the cylinder rod 5 and the bearing 8, and can improve the wear resistance of the components, thereby extending the service life of the mechanism.

[0035] like Figure 3 and 4 As shown, the lower part of the stand 2 is provided with a limit block 9 extending outward, and the limit block 9 is directly opposite to the bottom of the lifting plate 3, and is used to limit the lifting plate 3 from moving downward to the lowest position, so as to ensure that when the lifting plate 3 reaches the limit position, the pressing plate 4 can block the middle cover opening B1. A buffer structure 10 is provided between the limit block 9 and the lower end of the lifting plate 3, and the buffer structure 10 can reduce the impact of the limit block 9 when the lifting plate 3 moves to the limit position, avoiding a hard collision between the two components, ensuring the feasibility and safety of the mechanism, and on the other hand, optimizing the pressing impact force of the pressing plate 4 on the middle cover opening B1, avoiding deformation of the middle cover.

[0036] Furthermore, Figure 5 As shown, the buffer structure 10 includes an elastic component 10c and a connecting column 10a vertically penetrating the thickness direction of the limit block 9, wherein the connecting column 10a can move up and down relative to the limit block 9. A cap 10b is provided at the upper end of the connecting column 10a, and the cross-sectional area of ​​the cap 10b is larger than the cross-sectional area of ​​the connecting column 10a. The elastic component 10c is sleeved on the connecting column 10a, and one end of the elastic component 10c abuts against the lower surface of the cap 10b, and the other end abuts against the upper surface of the limit block 9. When the lifting plate 3 moves downward to the extreme position, the lower end of the lifting plate 3 abuts against the cap 10b. At this time, the lifting plate 3 can overcome the pressure of the elastic component 10c and compress the elastic component 10c downward. When the lifting plate 3 moves upward away from the connecting column 10a, the elastic component 10c can release the upward force to reset the connecting column 10a.

[0037] Furthermore, if Figure 2 and 3 As shown, a support beam 11 is provided on the front side of the lifting plate 3, the support beam 11 is perpendicular to the lifting plate 3 and extends forward, and the lower end of the support beam 11 is fixedly connected to the upper surface of the pressing plate 4. Such a design can make the connection between the pressing plate 4 and the lifting plate 3 more stable.

[0038] Please refer to Figure 4 In this embodiment, there are two groups of vertical frames 2, which are respectively arranged at the two ends of the width direction of the support base 1, and the cylinder body 6 is arranged between the two groups of vertical frames 2. The two ends of the width direction of the lifting plate 3 are respectively slidably connected with the two groups of vertical frames 2, and the mounting seat 7 is located in the middle of the rear side of the lifting plate 3. Such a design improves the stability of the mechanism operation.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make a variety of similar expressions without violating the purpose and claims of the present invention, and such changes fall within the scope of protection of the present invention.

Claims

1. A telescopic control mechanism for sealing a middle cover opening, characterized in that: The battery box comprises a support base (1), wherein a vertical frame (2) extending vertically upward is provided on the support base (1), a lifting plate (3) is slidably mounted on the vertical frame (2), a pressing plate (4) is fixedly connected to the lifting plate (3), and the pressing plate (4) is used to seal the opening of the middle cover on the upper part of the battery box; The support base (1) is fixedly provided with a cylinder body (6) and a cylinder rod (5) telescopically mounted in the cylinder body (6); a mounting seat (7) is provided on one side of the lifting plate (3); a connecting through hole (51) is provided on the upper part of the cylinder rod (5); the connecting through hole (51) is rotatably connected to the mounting seat (7) via a rotating shaft (a); and the center line of the rotating shaft (a) is perpendicular to the upward and downward sliding direction of the lifting plate (3).

2. The telescopic control mechanism for sealing the middle cover opening according to claim 1, characterized in that: A bearing (8) is provided between the connecting through hole (51) and the rotating shaft (a), and the connecting through hole (51) and the bearing (8) are rotatably connected in a ball joint manner.

3. The telescopic control mechanism for sealing the middle cover opening according to claim 2, characterized in that: A friction sleeve (c) is provided between the connecting through hole (51) and the bearing (8).

4. The telescopic control mechanism for sealing the middle cover opening according to claim 1, characterized in that: The stand (2) is provided with a guide rail (21) extending in the height direction, a slider (22) is slidably connected to the guide rail (21), and one side of the lifting plate (3) is fixedly connected to the slider (22).

5. The telescopic control mechanism for sealing the middle cover opening according to claim 1, characterized in that: A limit block (9) extending outward is provided at the lower part of the stand (2), and the limit block (9) is used to limit the distance that the lifting plate (3) moves downward. A buffer structure (10) is provided between the limit block (9) and the lower end of the lifting plate (3), and the buffer structure (10) is used to mitigate the impact of the lifting plate (3) on the limit block (9).

6. The telescopic control mechanism for sealing the middle cover opening according to claim 5, characterized in that: The buffer structure (10) comprises an elastic component (10c) and a connecting column (10a) vertically penetrating the limit block (9); the connecting column (10a) can move up and down relative to the limit block (9); a cover cap (10b) is provided at the upper end of the connecting column (10a); the elastic component (10c) is sleeved on the connecting column (10a); one end of the elastic component (10c) abuts against the lower surface of the cover cap (10b), and the other end abuts against the upper surface of the limit block (9).

7. The telescopic control mechanism for sealing the middle cover opening according to claim 1, characterized in that: A supporting crossbeam (11) is provided on one side of the lifting plate (3) opposite to the pressing plate (4); the supporting crossbeam (11) is perpendicular to the lifting plate (3) and extends outwards; the lower end of the supporting crossbeam (11) is fixedly connected to the upper surface of the pressing plate (4).

8. The telescopic control mechanism for sealing the middle cover opening according to claim 1, characterized in that: The number of the vertical frames (2) is two groups, and the two groups of the vertical frames (2) are respectively installed at the two ends of the width direction of the support base (1), and the cylinder body (6) and the cylinder rod (5) are arranged between the two groups of vertical frames (2).

9. The telescopic control mechanism for sealing the middle cover opening according to claim 1, characterized in that: A groove (41) is provided at the circumferential edge of the lower side of the pressing plate (4), and a sealing strip (b) is fixedly embedded in the groove (41).

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