Expanding beam straightening fixture

Abstract

The utility model discloses an expansion beam shaping frock, including frock platform, be provided with three support seat on frock platform, and three support seat are used for supporting expansion beam, frock platform still is provided with the portal frame that is horizontally placed above three support seat, and the portal frame top corresponding three support seat position respectively is equipped with a compression device, places expansion beam on three support seat after, and compression device can exert the pressure to expansion beam to the downward. The utility model has the beneficial effect that: the expansion beam that is curved upwards because of welding heat is placed on three support seats, and three sets of compression devices move downward along the vertical direction, and the expansion beam is curved downwards on both ends and the middle part of the expansion beam, and the expansion beam is curved upwards because of welding, and the expansion beam is restored to straight modeling under the action of the pressure, thereby guaranteeing that the expansion beam has better dimensional accuracy after being installed to the battery box.

Description

Technical Field

[0001] This utility model relates to the field of battery box technology, specifically to an expansion beam shaping fixture. Background Technology

[0002] A battery enclosure typically includes a base plate and side beams surrounding the base plate, with the battery pack mounted on top of the base plate. During charging, discharging, and use, the battery pack will expand to some extent due to temperature changes and electrochemical reactions. Without effective buffering and absorption structures, long-term expansion and compression may lead to a decline in battery performance or even safety hazards.

[0003] To address the aforementioned issues, existing technologies typically incorporate an expansion beam structure on the base plate of the battery housing, positioned between the battery pack and the side beams. This beam absorbs the expansion force generated by the battery pack during operation, thereby mitigating the squeezing effect on the housing structure. To further enhance the structural stability of the expansion beam and prevent excessive deformation under stress, a support rod is usually installed between the expansion beam and the side beam on the side furthest from the battery pack, providing necessary rigid support.

[0004] However, during the manufacturing process of the battery pack, support rods typically need to be pre-welded to the expansion beam. Due to the concentrated high temperatures generated during welding, the expansion beam undergoes localized thermal deformation during the heating and cooling process, specifically bending towards the side where the battery pack is located, resulting in an arc-shaped structure. Although this deformation occurs after cooling following welding, it often cannot fully recover, leading to a certain degree of bending deformation in the final formed expansion beam. This deformation not only affects the dimensional accuracy and structural performance of the expansion beam itself but also encroaches on the installation space of the battery pack, causing difficulties in battery pack assembly and even failing to meet the tolerance requirements for the linear dimension of the front-to-back spacing of the modules, thus affecting the safety and service life of the entire vehicle. Utility Model Content

[0005] In view of this, the present invention provides an expansion beam shaping fixture that can correct the bending deformation of the expansion beam after welding.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows:

[0007] An expansion beam shaping fixture includes a fixture platform, characterized in that: the fixture platform is provided with three support seats for supporting the expansion beam, and the fixture platform is also provided with a gantry bracket placed horizontally above the three support seats, and a clamping device is provided on the top of the gantry bracket corresponding to the position of the three support seats respectively; after the expansion beam is placed on the three support seats, the clamping device can apply downward pressure to the expansion beam.

[0008] Using the above structure, the expansion beam, which is bent upward due to the heat of welding, is placed on three support seats. Three sets of clamping devices move downward in the vertical direction, applying downward pressure to the expansion beam at both ends and the middle. Under this pressure, the upward bending state of the expansion beam caused by welding can be corrected, and the flat shape can be restored, thereby ensuring that the expansion beam has better dimensional accuracy after being installed in the battery box.

[0009] Preferably, the clamping device is a pneumatic-hydraulic booster cylinder, which includes a cylinder seat mounted on the upper end of the gantry support and a piston rod that can extend and retract vertically within the cylinder seat. A pressure block is fixed to the lower end of the piston rod, and the pressure block is positioned directly above each support seat. Using this structure, by controlling the downward movement of the piston rod of the pneumatic-hydraulic booster cylinder, continuous pressure can be applied to the expansion beam. Using a pneumatic-hydraulic booster cylinder as the clamping device not only ensures sufficient pressure but also saves on the need for a separate hydraulic station mechanism, effectively reducing the overall investment cost.

[0010] Preferably, of the three support seats, the one in the middle is a fixed seat, and the two at both ends are movable seats. The fixed seat is fixedly installed on the tooling platform, while the movable seats are not fixed and can be adjusted left and right relative to the tooling platform. Using this structure, by adjusting the two movable seats, it is possible to accommodate expansion beams of different sizes, thereby increasing the adaptability of the shaping tooling. Furthermore, by adjusting the movable seats at both ends, it is easier to find the optimal clamping point, ensuring the effective clamping and shaping of the expansion beam.

[0011] Preferably, of the three clamping devices, the middle clamping device is fixedly mounted on the gantry support, while the remaining two clamping devices can be slidably mounted along the length of the gantry support. With this structure, by adjusting the clamping devices on both sides, it is possible to accommodate expansion beams of different sizes, thereby increasing the adaptability of the shaping fixture. Furthermore, by movably positioning the clamping devices on both sides at the top of the gantry support, the pressure applied to the expansion beam by the clamping devices can be changed, improving the shaping effect of the expansion beam.

[0012] Preferably, the height of the fixed seat is lower than the height of the two movable seats. With this structure, during the downward pressing of the expansion beam by the three sets of clamping devices, the rotating support blocks at both ends can deflect inwards, allowing the expansion beam to be pressed in the opposite direction into a slightly downward-bent state in the middle. Because the expansion beam itself has a certain degree of metallic elasticity, when the clamping device separates from the expansion beam, the expansion beam can maintain a straight state through its rebound force, thereby ensuring the battery pack installation accuracy.

[0013] Preferably, the movable base includes a movable base with a vertically upward-extending mounting rod at its center. A rotating support block is hinged to the upper end of the mounting rod, allowing the rotating support block to rotate towards or away from the fixed base. Limiting rods are also provided on both sides of the mounting rod to limit the rotation angle of the rotating support block. With this structure, the hinged support block ensures that when the expansion beam is reverse-pressed into a slightly downward-bent state, both ends of the expansion beam maintain sufficient contact area with the movable base. The limiting rods prevent excessive rotation angle of the support block from affecting the final correction effect of the expansion beam.

[0014] Preferably, the gantry frame includes two main support bodies arranged parallel to each other. Each main support body includes two columns and a crossbeam placed between the upper ends of the two columns. A connecting plate is fixed between the upper parts of the two columns at the same end of the two main support bodies. The clamping devices at both ends are slidably mounted on the crossbeam along its length via slide rail assemblies. With this structure, the clamping devices on both sides can adjust the pressure position of the expansion beam through the slide rail assemblies, improving the shaping effect of the expansion beam. Furthermore, it can accommodate expansion beams of different sizes and models, increasing the adaptability of the shaping fixture.

[0015] Preferably, the slide rail assembly includes slide rails disposed on opposite sides of the two crossbeams and sliders slidably mounted on the slide rails. Two sliders are provided, and each slider has a clamping device fixedly mounted on it. With this structure, the positions of the clamping devices on both sides can be adjusted by driving the sliders to slide.

[0016] Preferably, a handwheel lever is threaded onto the connecting plate, with its inner end rotatably connected to the slider and its outer end equipped with a handwheel. With this structure, the position of the slider on the gantry bracket can be easily adjusted by rotating the handwheel lever, making operation very simple.

[0017] Preferably, a fixing block is also fixedly installed in the middle of the two crossbeams, the fixing block facing the fixing seat, and one of the pressing devices is fixedly installed on the fixing block. This structure ensures that the middle of the expansion beam is stably pressed down.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] 1. Using the expansion beam shaping fixture provided by this utility model, the expansion beam that has bent upward due to welding heat is placed on three support seats. Three sets of clamping devices move downward in the vertical direction, applying downward pressure to the expansion beam at both ends and the middle. Under this pressure, the upward bending state of the expansion beam caused by welding can be corrected and the flat shape can be restored, thereby ensuring that the expansion beam has better dimensional accuracy after being installed in the battery box.

[0020] 2. The installation positions of the clamping devices on both sides and the moving seat can be adjusted, which increases the adaptability of the entire shaping fixture and thus meets the shaping requirements of expansion beams of different models and sizes. Attached Figure Description

[0021] Figure 1 This is a structural schematic diagram of the expansion beam shaping fixture;

[0022] Figure 2 A structural schematic diagram illustrating the distribution relationship between support base 2 and positioning rod 5;

[0023] Figure 3 This is a top view of the expansion beam 7 placed on the support 2.

[0024] Figure 4 This is a magnified view of a portion of the expansion beam shaping fixture in actual use.

[0025] Figure 5 This is a schematic diagram of the structure of the movable seat 2b;

[0026] Figure 6 This is a schematic diagram of the structure of the gantry support 3;

[0027] Figure 7 This is a schematic diagram of the expansion beam 7. Detailed Implementation

[0028] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0029] The expansion beam shaping fixture in this embodiment is mainly used for shaping. Figure 7 The expansion beam 7 shown has support rods 7a distributed on the side of the expansion beam 7 away from the battery pack. Each support rod 7a is fixedly connected to the expansion beam 7 by welding. After the support rods 7a are welded to the expansion beam 7, during the heating and cooling process, the middle of the expansion beam 7 will arch away from the support rods 7a, resulting in bending deformation. The expansion beam shaping fixture provided in this embodiment can correct this bending deformation, so that the expansion beam 7 can be restored to a straight state.

[0030] like Figure 1As shown, an expansion beam shaping fixture includes a fixture platform 1 with three support seats 2 on the fixture platform 1. Each support seat 2 supports an expansion beam 7. A gantry bracket 3 is also fixedly installed on the surface of the fixture platform 1, positioned horizontally above the three support seats 2. A clamping device 4 is installed at the top of the gantry bracket 3 corresponding to the position of each of the three support seats 2, for a total of three sets of clamping devices 4. After the expansion beam 7 is supported on the three support seats 2, the clamping devices 4 apply downward pressure to the expansion beam 7. Based on this structural arrangement, the expansion beam 7 and the support rods 7a, welded together, are placed into the shaping fixture, ensuring that the expansion beam 7 is supported on the three support seats 2, with each support rod 7a in a drooping state. At this time, the expansion beam 7 is in a curved state with its middle section arched upwards. Then, the three sets of clamping devices 4 move downward in the vertical direction, applying downward pressure to the expansion beam 7 at both ends and the middle. Under this pressure, the upward bending state of the expansion beam 7 caused by welding can be corrected, and the straight shape can be restored, thereby ensuring that the expansion beam 7 has better dimensional accuracy after being installed in the battery box.

[0031] In this embodiment, all three clamping devices 4 are pneumatic-hydraulic booster cylinders. Each pneumatic-hydraulic booster cylinder includes a cylinder seat 4a mounted on the upper end of the gantry bracket 3, and a piston rod 4b that can extend and retract vertically within the cylinder seat 4a. A pressure block 4c is fixed to the lower end of the piston rod 4b, and the pressure block 4c is positioned directly above each support seat 2. By controlling the piston rod 4b of the pneumatic-hydraulic booster cylinder to move downward, continuous pressure can be applied to the expansion beam 7. The pneumatic-hydraulic booster cylinder not only provides sufficient pressure but also avoids the need for an additional hydraulic station mechanism, effectively reducing the overall investment cost.

[0032] like Figure 2 As shown, among the three support seats 2, the one in the middle is the fixed seat 2a, and the two at both ends are the movable seats 2b. The fixed seat 2a is fixedly installed on the tooling platform 1, while the movable seats 2b are not fixed and can be adjusted left and right. Correspondingly, among the three clamping devices 4, the clamping device 4 in the middle is fixedly installed on the gantry bracket 3, and the remaining two clamping devices 4 are slidably installed along the length of the gantry bracket 3. This design allows for the adjustment of the specific positions of the movable seats 2b at both ends and the clamping devices 4 at both ends to accommodate the shaping and straightening of expansion beams 7 of different lengths, improving the adaptability of the shaping tooling. In addition, adjusting the movable seats 2b at both ends and the clamping devices 4 at both ends also facilitates finding the optimal clamping point, improving the shaping effect of the expansion beam 7.

[0033] In this embodiment, the fixed base 2a is fixedly installed on the tooling platform 1 by bolts.

[0034] Furthermore, such as Figure 6As shown, the gantry support 3 includes two main support bodies 3a arranged in parallel front and rear. Each of the two main support bodies 3a includes two columns a and a horizontal beam b placed between the upper ends of the two columns. A connecting plate 3b is fixed between the upper parts of the two columns a at the same end of the two main support bodies 3a. The clamping devices 4 located at both ends are slidably assembled on the length direction of the horizontal beam b through the slide rail assembly.

[0035] Specifically, the slide rail assembly includes slide rails 3c disposed on opposite sides of the two crossbeams b, and sliders 3d slidably mounted on the slide rails 3c. Two sliders 3d are provided, each with a clamping device 4 fixedly mounted on it. A handwheel lever 6 is threadedly connected to each connecting plate 3b. The inner end of the handwheel lever 6 is rotatably connected to the slider 3d, and the outer end has a handwheel 6a. This design allows for left and right sliding adjustment of the clamping devices 4 on both sides by rotating the handwheel 6a, making the overall operation very convenient and quick.

[0036] like Figure 6 As shown, a fixing block 3e is fixedly installed in the middle of the two crossbeams b, with the fixing block 3e facing the fixing seat 2a. One of the clamping devices 4 is fixedly installed on the fixing block 3e. This design ensures that the middle of the expansion beam 7 is stably compressed.

[0037] like Figure 5 As shown, each of the two movable seats 2b has a rotating support block 2b3 rotatably mounted on its top. After the fixed seat 2a and the two movable seats 2b are installed on the tooling platform 1, the height of the fixed seat 2a is slightly lower than that of the movable seats 2b at both ends. With this design, after the expansion beam 7 is supported on the fixed seat 2a and the two movable seats 2b, during the process of the three sets of clamping devices 4 pressing the expansion beam 7 downward, the rotating support blocks 2b3 at both ends can deflect inward so that the expansion beam 7 can be pressed in the opposite direction into a state where the middle is slightly bent downward. Since the expansion beam 7 itself has a certain metal elasticity, when the clamping device 4 is separated from the expansion beam 7, the expansion beam 7 can be kept in a straight state by the rebound force, thereby ensuring the installation accuracy of the battery pack.

[0038] Specifically, the movable seat 2b includes a movable base 2b1, which is installed on the tooling platform 1. The movable base 2b1 has a vertically upward extending mounting rod 2b2 in the middle. The support block 2b3 is connected to the upper end of the mounting rod 2b2. Since the height of the fixed seat 2a is slightly lower than that of the movable seats 2b at both ends, when the clamping device 4 applies downward pressure to the expansion beam 7, the two ends of the expansion beam 7 are subjected to a force that converges towards the lower middle end in addition to the downward pressure, thereby causing the support block 2b3 to rotate relative to the mounting rod 2b2 toward the fixed seat 2a.

[0039] In addition, by hingedly setting the support block 2b3, it can be ensured that when the expansion beam 7 is pressed in the opposite direction and bent slightly downward in the middle, there is a sufficient contact area between the two ends of the expansion beam 7 and the support block 2b3, thereby ensuring the correction effect.

[0040] In this embodiment, limit rods 2b4 are also provided on both sides of the mounting rod 2b2. The limit rods 2b4 are used to limit the rotation angle of the rotating support block 2b3 to avoid the support block 2b3 rotating too much and affecting the final shaping effect of the expansion beam 7.

[0041] like Figure 2 and Figure 3 As shown, a positioning rod 5 is provided at the rear end of each support 2 and on the side of one of the movable seats 2b. The expansion beam 7 can be quickly positioned by the four positioning rods 5. In this embodiment, the positioning rods 5 can be adjusted according to the specific installation position of the movable seat 2b.

[0042] For example Figure 3 and Figure 4 As shown, rubber pads 8 are provided on the side of the positioning rod 5 near the expansion beam 7, the top of the support base 2, and the lower end of the clamping device 4. The design of the rubber pads 8 can prevent the expansion beam 7 from directly contacting the various metal parts of the shaping fixture, thereby preventing the expansion beam 7 from wearing during the compression process. In addition, for some expansion beams 7 with longer support rods 7a, thicker rubber pads 8 can be installed on the top of the support base 2 so that the entire shaping fixture can be used normally.

[0043] like Figure 1 As shown, a control box 9 is also installed on the side of the gantry bracket 3. The control box 9 is electrically connected to the three clamping devices 4. By operating the control box 9, the three clamping devices 4 can be pressed down and lifted up.

[0044] Finally, it should be noted that the above description is merely a preferred embodiment of the present utility model. Those skilled in the art, under the guidance of the present utility model, can make various similar representations without departing from the spirit and claims of the present utility model, and such modifications all fall within the protection scope of the present utility model.

Claims

1. A shaping fixture for expansion beams, comprising a fixture platform (1), characterized in that: The tooling platform (1) is provided with three support seats (2), which are used to support the expansion beam. The tooling platform (1) is also provided with a gantry bracket (3) placed horizontally above the three support seats (2). A clamping device (4) is provided on the top of the gantry bracket (3) corresponding to the position of the three support seats (2). After the expansion beam is placed on the three support seats (2), the clamping device (4) can apply downward pressure to the expansion beam.

2. The expansion beam shaping fixture according to claim 1, characterized in that: The pressing device (4) is a gas-liquid booster cylinder. The gas-liquid booster cylinder includes a cylinder seat (4a) installed on the upper end of the gantry bracket (3) and a piston rod (4b) that can be extended and retracted in the cylinder seat (4a). A pressure block (4c) is fixed at the lower end of the piston rod (4b). The pressure block (4c) is directly above each support seat (2).

3. The expansion beam shaping fixture according to claim 1, characterized in that: Of the three support seats (2), the one in the middle is the fixed seat (2a), and the one at each end is the movable seat (2b). The fixed seat (2a) is fixedly installed on the tooling platform (1), and the movable seat (2b) is in a non-fixed state and can be adjusted left and right relative to the tooling platform (1).

4. The expansion beam shaping fixture according to claim 3, characterized in that: Of the three clamping devices (4), the middle clamping device (4) is fixedly installed on the gantry bracket (3), and the remaining two clamping devices (4) can be slidably installed along the length of the gantry bracket (3).

5. The expansion beam shaping fixture according to claim 3, characterized in that: The height of the fixed seat (2a) is lower than the height of the two movable seats (2b).

6. The expansion beam shaping fixture according to claim 3, characterized in that: The movable base (2b) includes a movable base (2b1), and a vertically upward extending mounting rod (2b2) ​​is provided in the middle of the movable base (2b1). A rotating support block (2b3) is hinged to the upper end of the mounting rod (2b2). The rotating support block (2b3) can rotate towards or away from the fixed base (2a). Limiting rods (2b4) are also provided on both sides of the mounting rod (2b2). The limiting rods (2b4) are used to limit the rotation angle of the rotating support block (2b3).

7. The expansion beam shaping fixture according to claim 4, characterized in that: The gantry support (3) includes two main support bodies (3a) arranged in parallel front and rear. Each of the two main support bodies (3a) includes two columns (a) and a crossbeam (b) placed horizontally between the upper ends of the two columns. A connecting plate (3b) is fixed between the upper parts of the two columns (a) at the same end of the two main support bodies (3a). The clamping devices (4) located at both ends are slidably assembled on the length direction of the crossbeam (b) through the slide rail assembly.

8. The expansion beam shaping fixture according to claim 7, characterized in that: The slide rail assembly includes slide rails (3c) disposed on opposite sides of two crossbeams (b) and sliders (3d) slidably mounted on the slide rails (3c). There are two sliders (3d), and each slider (3d) is fixedly mounted with a clamping device (4).

9. The expansion beam shaping fixture according to claim 8, characterized in that: The connecting plate (3b) is threaded with a handwheel rod (6), the inner end of which is rotatably connected to the slider (3d), and the outer end of which is provided with a handwheel (6a).

10. The expansion beam shaping fixture according to claim 7, characterized in that: A fixing block (3e) is also fixedly installed in the middle of the two crossbeams (b), the fixing block (3e) is directly opposite the fixing seat (2a), and one of the pressing devices (4) is fixedly installed on the fixing block (3e).

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