A welding tool and welding method for a battery case cross beam

Abstract

The application discloses a welding tool and a welding method for a battery shell cross beam, which comprises a base, a main body positioning unit installed on the base and used for supporting and positioning a cross beam structure of the battery shell cross beam, a pressing unit installed on the base and used for applying pressure to the cross beam structure of the battery shell cross beam, and a connecting rod supporting unit installed on the base and used for supporting a connecting rod which has not been assembled. The structural design of the application fully conforms to the structural features of the battery shell cross beam, can ensure the assembly accuracy, avoid the clamping piece, and ensure the product quality of subsequent welding.

Description

Technical Field

[0001] This invention relates to the field of intelligent manufacturing, specifically to a welding fixture and welding method for a battery casing crossbeam. Background Technology

[0002] The battery casing crossbeam of new energy vehicles is used in the chassis of the car. It is a major structural component, load-bearing component and assembly fastener used to fix the battery pack. It mainly includes the crossbeam structure and the connecting rod that cooperates with it. After the two are put together, they are welded to form the final battery casing crossbeam.

[0003] When assembling the crossbeam structure and connecting rods, the crossbeam structure itself is deformed after welding, which often causes the crossbeam structure and connecting rods to misalign during assembly. This results in frequent jamming, which requires frequent line stops for adjustment and affects production efficiency. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a welding fixture and welding method for a battery casing crossbeam. Its structural design fully conforms to the structural characteristics of the battery casing crossbeam, ensuring assembly accuracy, avoiding jamming, and guaranteeing the quality of subsequent welded products.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] On the one hand, a welding fixture for a battery casing crossbeam is provided, comprising:

[0007] Base;

[0008] The main positioning unit is installed on the base and is used to support and position the crossbeam structure of the battery casing beam.

[0009] A pressure unit, mounted on the base, is used to apply pressure to the beam structure of the battery case beam;

[0010] And a connecting rod support unit, which is mounted on the base for supporting the unassembled connecting rod.

[0011] On the other hand, a welding method for the battery casing crossbeam is also provided, which can be achieved using the aforementioned welding fixture for the battery casing crossbeam. The welding method includes the following steps:

[0012] Obtain the crossbeam structure of the battery casing crossbeam;

[0013] Support and clamp the connecting rod of the battery casing beam;

[0014] Complete the assembly of the beam structure and connecting rods;

[0015] Apply pressure to the beam structure and connecting rods;

[0016] Welding is performed at the joints of the connecting rod and the crossbeam structure to obtain the battery casing crossbeam.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The structural design of the welding fixture in this invention fully conforms to the structural characteristics of the battery casing beam. It can position different parts of the battery casing beam through different support and clamping units, ensuring the accuracy of assembly and guaranteeing the quality of subsequent welding products.

[0019] In addition, the present invention first positions the connecting rod by lifting pin, and then clamps the end cap of the connecting rod by gripper to ensure that the connecting rod is in an upright state, so that the connecting rod can pass smoothly through the crossbeam structure to complete the assembly of the two.

[0020] Meanwhile, after placing the crossbeam structure on the main support unit, the present invention first presses it down through the intermediate pressing component to ensure the stability of the crossbeam structure position. Then, the lifting unit drives the crossbeam structure to move down smoothly, so that the hole on the crossbeam structure through which the connecting rod passes accurately aligns with the connecting rod, so as to quickly complete the assembly of the two and avoid jamming. Attached Figure Description

[0021] Figure 1 This is an overall structural diagram of the battery casing crossbeam in this invention;

[0022] Figure 2 This is a cross-sectional view of the battery casing beam in this invention;

[0023] Figure 3 This is an overall structural diagram of the welding fixture in this invention;

[0024] Figure 4a This is a first-person view of the assembly diagram of the base and the main positioning unit in this invention;

[0025] Figure 4b This is a schematic diagram of the assembly of the base and the main positioning unit in this invention from a second perspective;

[0026] Figure 5 This is an overall structural diagram of the main support unit in this invention;

[0027] Figure 6 This is a front view of the battery casing beam in this invention;

[0028] Figure 7 This is an overall structural diagram of the left auxiliary support component in this invention;

[0029] Figure 8 This is an assembly diagram of the lifting unit, main support unit, and battery casing beam in this invention;

[0030] Figure 9 This is an overall structural diagram of the left crossbeam pressing assembly / right crossbeam pressing assembly in this invention;

[0031] Figure 10 This is an overall structural diagram of the left connecting rod pressing assembly / right connecting rod pressing assembly in this invention;

[0032] Figure 11 This is an overall structural diagram of the intermediate pressing component in this invention;

[0033] Figure 12 This is an overall structural diagram of the left connecting rod support assembly and the right connecting rod support assembly in this invention;

[0034] Figure 13 This is an overall structural diagram of the left connecting rod clamping assembly and the right connecting rod clamping assembly in this invention;

[0035] Figure 14 This is an overall structural diagram of the left end support assembly / right end support assembly of the crossbeam in this invention;

[0036] Figure 15 This is an assembly diagram of the connecting rod detection unit, detection signal receiving unit, crossbeam anti-reverse detection unit, and air blowing cleaning device in this invention.

[0037] Figure 16 This is an overall structural diagram of the lifting unit in this invention;

[0038] Figure 17 This is an overall structural diagram of the anti-reverse detection unit of the crossbeam in this invention. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] Example 1:

[0041] like Figure 1-2 As shown, the battery casing crossbeam in this application is used in the manufacture of new energy vehicles. Its structural design belongs to the prior art. Specifically, the battery casing crossbeam includes a crossbeam structure P and a connecting rod 3. The connecting rod 3 includes an end cap 31 and a rod body 32 connected to the end cap 31.

[0042] The beam structure P includes:

[0043] The main body of the beam is 1, and the top of the rod 32 passes through the main body of the beam and extends from the upper end face of the main body of the beam. The end cap 31 is located at the bottom of the main body of the beam and outside the main body of the beam.

[0044] Two L-shaped brackets 6 are respectively connected to the two sides of the main body of the crossbeam 1;

[0045] Cover plate 5, which is connected to the bottom of the crossbeam body 1, and end cap 31 abuts against cover plate 5;

[0046] Left sealing component 2 and right sealing component 7 are respectively installed at the left and right ends of each L-shaped bracket 6;

[0047] And a connecting rod reinforcing plate 4, which connects to the upper surface of the crossbeam body 1 and is sleeved on the outer circumferential surface of the part of the rod 32 that extends from the upper end face of the crossbeam body 1.

[0048] Based on this, such as Figure 3 As shown, this embodiment provides a welding fixture for a battery casing crossbeam, which includes:

[0049] Base 100;

[0050] The main positioning unit 200 is installed on the base 100 and is used to support and position the entire beam structure P.

[0051] A pressure unit, mounted on the base 100, is used to apply pressure to the beam structure P;

[0052] A connecting rod support unit, which is mounted on the base 100, is used to support the unassembled connecting rod 3;

[0053] A connecting rod clamping unit is mounted on the base 100 and is used to clamp and fix the unassembled connecting rod 3;

[0054] And an end support unit 600, which is mounted on the base 100, for supporting the two ends of the beam structure P that has been assembled with the connecting rod 3.

[0055] Specifically, such as Figures 4a-4b As shown, the main body positioning unit 200 includes:

[0056] The main support unit 220 is used to support the entire beam structure P;

[0057] The lifting unit 210 is connected to the main support unit 220 and is used to drive the main support unit 220 and the crossbeam structure P to move linearly in the height direction.

[0058] And a bottom limiting block 230, which is connected to the base 100, for limiting the travel of the main support unit 220.

[0059] like Figure 5 As shown, the main support unit 220 includes:

[0060] Mounting plate 2201;

[0061] The left-side support assembly is used to support and position the left-side portion L of the beam structure P;

[0062] The right-side support assembly is used to support and position the right-side portion R of the beam structure P;

[0063] And the central support assembly, which is used to support and position the middle part M of the beam structure P;

[0064] Among them, such as Figure 6 As shown, the vertical central axis Y1 of the middle part M coincides with the vertical central axis Y0 of the entire beam structure P, and the middle part M is an axisymmetric structure symmetrical about its vertical central axis Y1. At the same time, the length of the middle part M ranges from [20%*L0, 80%*L0], where L0 is the total length of the beam structure P; the part located to the left of the middle part M is the left part L of the beam structure P, and the part located to the right of the middle part M is the right part R of the beam structure P.

[0065] Specifically, such as Figure 5 As shown, the left-side support component includes:

[0066] The left support arm 2203 is mounted on the left end of the mounting plate 2201 via components such as the support arm mounting block 2202, and the extension direction of the free end of the left support arm 2203 is parallel to the length direction of the mounting plate 2201.

[0067] The left crossbeam support 2204 has one end vertically connected to the left support arm 2203 and the other end extending away from the left support arm 2203 to contact the bottom of the cover plate 5, so as to support the left side portion L of the crossbeam structure P. In this embodiment, there may be multiple left crossbeam supports 2204, which are arranged in parallel to each other.

[0068] The first L-shaped positioning pin adapter block 2205 is connected to the left support arm 2203;

[0069] The first L-shaped component positioning pin mounting block 2206 is connected to the first L-shaped component positioning pin adapter block 2205 and is used to install the first L-shaped component positioning pin 2207 that can pass through an L-shaped bracket 6 in the height direction, so as to achieve positioning of the L-shaped bracket 6.

[0070] The first cover plate positioning pin adapter block 2208 is connected to the left support arm 2203;

[0071] The first cover plate positioning pin mounting block 2209 is connected to the first cover plate positioning pin adapter block 2208 and is used to install the first cover plate positioning pin 2210. The first cover plate positioning pin 2210 is used to pass through the cover plate 5 of the left part L in the height direction / and simultaneously pass through the cover plate 5 of the left part L and the crossbeam body 7 in the height direction.

[0072] And the left auxiliary support member 2209', which is connected to the base 100, is used to contact the bottom of the cover plate 5 of the left part L to support the left part L of the beam structure P. Specifically, as shown in the figure... Figure 7 As shown, the left auxiliary support 2209' includes a left auxiliary support adapter block 22091 and a left auxiliary support block 22092 connected to the left auxiliary support adapter block 22091 for contacting the bottom of the cover plate 5 of the left part L, so as to support the left part L of the beam structure P through the left auxiliary support block 22092.

[0073] The right-side support component includes:

[0074] The right support arm 2211 is mounted on the right end of the mounting plate 2201 via components such as the support arm mounting block 2202. The extension direction of the free end of the right support arm 2211 is parallel to the length direction of the mounting plate 2201. Meanwhile, the extension directions of the free ends of the left support arm 2203 and the right support arm 2211 are parallel / located on the same straight line, and their extension directions are opposite.

[0075] The right crossbeam support member 2212 has one end vertically connected to the right support arm 2211, and the other end extends away from the right support arm 2211 to contact the bottom of the cover plate 5, so as to support the right side part R of the crossbeam structure P.

[0076] The second L-shaped positioning pin adapter block 2213 is connected to the right support arm 2211;

[0077] The second L-shaped component positioning pin mounting block 2215 is connected to the second L-shaped component positioning pin adapter block 2213 and is used to install the second L-shaped component positioning pin 2222, which can pass through another L-shaped bracket 6 in the height direction, so as to achieve positioning of the L-shaped bracket 6.

[0078] The second cover plate positioning pin adapter block 2216 is connected to the right support arm 2211;

[0079] The second cover plate positioning pin mounting block 2217 is connected to the second cover plate positioning pin adapter block 2216 and is used to install the second cover plate positioning pin 2218. The second cover plate positioning pin 2218 is used to pass through the cover plate 5 of the right side portion R in the height direction / the cover plate 5 and the crossbeam body 1 of the right side portion R can pass through simultaneously in the height direction.

[0080] And a right auxiliary support 2214, which is connected to the second L-shaped positioning pin adapter block 2213, and its free end extends toward the right crossbeam support 2212, for contacting the bottom of the cover plate 5 of the right part R, so as to support the right part R of the crossbeam structure P; similarly, there can be multiple right crossbeam supports 2212 and right auxiliary support 2214, and multiple right crossbeam supports 2212 and multiple right auxiliary support 2214 are arranged in parallel to each other.

[0081] The central support component includes:

[0082] A beam limiting unit, connected to the mounting plate 2201, is used to limit the position of the middle part M of the beam structure P, so that the beam structure P can only move in the height direction; specifically, there can be several sets of beam limiting units, and each set of beam limiting units includes: two parallel guide limiting blocks 2219, both connected to the mounting plate 2201, and a gap is formed between the two guide limiting blocks 2219 to accommodate all / part of the middle part M of the beam structure P;

[0083] And a bottom pad 2220, which is connected to the mounting plate 2201 and located in the gap between the two guide limit blocks 2219, is used to contact the bottom of the cover plate 5 to support the middle part M of the beam structure P.

[0084] Furthermore, shims can be provided between the first L-shaped component positioning pin adapter block 2205 and the first L-shaped component positioning pin mounting block 2206, and between the second cover plate positioning pin adapter block 2216 and the second cover plate positioning pin mounting block 2217, so that the position of the components can be adjusted by adding or removing shims.

[0085] Therefore, as Figure 8As shown, the middle part M of the beam structure P is located in the gap between the two guide limiting blocks 2219, and its bottom is supported by the bottom pad 2220. The bottom of the left part L of the beam structure P is supported by the left beam support 2204 and the left auxiliary support 2209'. The L-shaped bracket 6 and the cover plate 5 of the left part L are respectively positioned by the first L-shaped member positioning pin 2207 and the first cover plate positioning pin 2210. Similarly, the bottom of the right part R of the beam structure P is supported by the right beam support 2212 and the right auxiliary support 2214. The L-shaped bracket 6 and the cover plate 5 of the right part R are respectively positioned by the second L-shaped member positioning pin 2222 and the second cover plate positioning pin 2218. The L-shaped brackets positioned by the first L-shaped member positioning pin 2207 and the second L-shaped member positioning pin 2222 are different.

[0086] like Figure 3 As shown, the pressing unit includes:

[0087] The left crossbeam pressing assembly 310 and the right crossbeam pressing assembly 350 are both connected to the base 100 and correspond to the positions of the left part L and the right part R of the crossbeam structure P, respectively, and are used to apply pressure to the left part L and the right part R of the crossbeam structure P that have been assembled with the connecting rod 3.

[0088] The left connecting rod pressing assembly 320 and the right connecting rod pressing assembly 340 are both connected to the base 100 and correspond to the positions of the left part L and the right part R of the crossbeam structure P, respectively. They are used to apply pressure to the connecting rods 3 of the left part L and the right part R of the crossbeam structure P, which have been assembled with connecting rods 3.

[0089] And the intermediate pressing component 330, which is connected to the base 100 and located between the left crossbeam pressing component 310 and the right crossbeam pressing component 350, is used to apply pressure to the crossbeam body 1 of the middle part M of the crossbeam structure P.

[0090] Specifically, such as Figure 9 As shown, the left crossbeam pressing assembly 310 / right crossbeam pressing assembly 350 includes:

[0091] The first cylinder mounting bracket 3101 is connected to the base 100;

[0092] The first cylinder 3102 is connected to the first cylinder mounting bracket 3101;

[0093] The first pressure arm 3103 is connected to the power output end of the first cylinder 3102 and rotates under the drive of the first cylinder 3102.

[0094] The first L-shaped pressure block 3104 is connected to the first pressure arm 3103 and is used to apply pressure to the L-shaped bracket 6 under the drive of the first pressure arm 3103. In this embodiment, there are two first L-shaped pressure blocks 3104, which respectively apply pressure to the two L-shaped brackets 6.

[0095] The first crossbeam pressure block 3105 is connected to the first pressure arm 3103 and is used to apply pressure to the crossbeam body 1 under the drive of the first pressure arm 3103. Preferably, the first crossbeam pressure block 3105 is located between two L-shaped pressure blocks 3105 so as to correspond to the position of the crossbeam body 1.

[0096] And a first protective cover 3106, which is installed on the first cylinder 3102 and covers the pneumatic connector of the first cylinder 3102, to prevent welding slag from splashing during welding and causing damage to the pneumatic connector.

[0097] Furthermore, in this embodiment, the left crossbeam pressing assembly 310 and the right crossbeam pressing assembly 350 have the same structure and are symmetrically arranged about the central axis of the base 100. The central axis of the base 100 is perpendicular to the extension direction of the free end of the left support arm 2203 / right support arm 2211.

[0098] like Figure 10 As shown, the left connecting rod pressing assembly 320 / right connecting rod pressing assembly 340 includes:

[0099] The second cylinder mounting bracket 3201 is connected to the base 100;

[0100] The second cylinder 3202 is connected to the second cylinder mounting bracket 3201;

[0101] The second pressure arm 3203 is connected to the power output end of the second cylinder 3202 and rotates under the drive of the second cylinder 3202;

[0102] The pressure member adapter block 3204 is connected to the second pressure arm 3203;

[0103] The first pressure plate 3205 is connected to the lower pressure member adapter block 3204 and is used to apply pressure to the crossbeam body 1 and / or L-shaped bracket 6 under the drive of the second pressure arm 3203.

[0104] The second pressure plate 3206 is connected to the lower pressure member adapter block 3204 and is used to apply pressure to the connecting rod reinforcing plate 4 under the drive of the second pressure arm 3203.

[0105] The connecting rod pressure block 3207 is connected to the lower pressure member adapter block 3204 and is used to apply pressure to the part of the connecting rod 3 that extends from the upper end face of the crossbeam body 1 (i.e., the part of the rod 32 that extends from the upper end face of the crossbeam body 1) under the drive of the second pressure arm 3203.

[0106] And a second protective cover 3208, which is installed on the second cylinder 3202 and covers the pneumatic connector of the second cylinder 3202, to prevent welding slag from splashing during welding and causing damage to the pneumatic connector.

[0107] Similarly, in this embodiment, the left connecting rod pressing assembly 320 and the right connecting rod pressing assembly 340 have the same structure and are symmetrically arranged about the central axis of the base 100.

[0108] Preferably, the first pressure plate 3205 of the left connecting rod pressing assembly 320 is used to apply pressure to the crossbeam body 1 and / or an L-shaped bracket 6 under the drive of the second pressure arm 3203, and the first pressure plate 3205 of the right connecting rod pressing assembly 340 is used to apply pressure to the crossbeam body 1 and / or another L-shaped bracket 6 under the drive of the second pressure arm 3203.

[0109] like Figure 11 As shown, the intermediate pressing assembly 330 includes:

[0110] The intermediate pressure cylinder mounting bracket 3301 is connected to the mounting plate 2201;

[0111] The intermediate pressing cylinder 3302 is connected to the intermediate pressing cylinder mounting bracket 3301;

[0112] The intermediate pressing arm 3303 is connected to the power output end of the intermediate pressing cylinder 3302 and rotates under the drive of the intermediate pressing cylinder 3302.

[0113] The intermediate pressure adapter block 3304 is connected to the intermediate pressure arm 3303;

[0114] The pressure beam 3305 is connected to the intermediate pressure adapter block 3304;

[0115] The lower pressure block 3306 is connected to the lower pressure beam 3305 (for example, it can be connected to the end of the lower pressure beam 3305), and is used to apply pressure to the crossbeam body 1 of the middle part M under the drive of the middle lower pressure arm 3303; preferably, there are multiple lower pressure blocks 3306, so as to apply pressure to different positions of the crossbeam body 1, so that the force is balanced and deformation is avoided.

[0116] And a limiting block assembly, which connects the intermediate pressing cylinder mounting bracket 3301 and / or the intermediate pressing adapter block 3304 and / or the intermediate pressing arm 3303, is used to limit the rotation stroke of the intermediate pressing arm 3303. For example, in this embodiment, the limiting block assembly includes an upper limiting block 3307 connected to the lower end face of the intermediate pressing adapter block 3304 and a lower limiting block 3308 connected to the intermediate pressing cylinder mounting bracket 3301. When the intermediate pressing arm 3303 rotates, the rotation stroke of the arm is limited by the contact of the upper limiting block 3307 and the lower limiting block 3308.

[0117] When the crossbeam structure P and the connecting rod 3 are not assembled, the intermediate pressing arm 3303 of the intermediate pressing assembly 330 drives the pressing beam 3305 and the pressing block 3306 to move down, so as to apply pressure to the corresponding component of the middle part M of the crossbeam structure P placed on the main support unit 220.

[0118] Then the lifting unit 210 drives the main support unit 220 and the crossbeam structure P to move down as a whole, so as to assemble the crossbeam structure P with the connecting rod 3.

[0119] After the crossbeam structure P and the connecting rod 3 are assembled, the first cylinder 3102 and the second cylinder 3202 drive the first pressure arm 3103 and the second pressure arm 3203 to rotate, so as to apply pressure to the corresponding parts of the left side part L and the right side part R of the crossbeam structure P respectively, so as to complete their positioning.

[0120] like Figure 3 As shown, the connecting rod support unit includes: a left connecting rod support assembly 510 and a right connecting rod support assembly 520, both of which are connected to the base 100 and are used to support a connecting rod 3 that is not assembled with the crossbeam structure P.

[0121] Specifically, such as Figure 12 As shown, the left connecting rod support assembly 510 / right connecting rod support assembly 520 includes:

[0122] The lifting pin lifting cylinder mounting block 5102 is directly mounted on the base 100, or mounted on the base 100 via the adjusting block 5101. For example, in this embodiment, the adjusting block 5101 can be connected to the outer periphery, bottom, or top of the lifting pin lifting cylinder mounting block 5102. At the same time, the adjusting block 5101 is connected to the base 100, thereby realizing the overall position adjustment of the left connecting rod support assembly 510 / right connecting rod support assembly 520.

[0123] Lifting pin lifting cylinder 5103, which is connected to the lifting pin lifting cylinder mounting block 5102;

[0124] The lifting pin support block 5104 is connected to the piston rod of the lifting pin lifting cylinder 5103;

[0125] And a lifting pin 5105, which is mounted on the lifting pin mounting block 5104;

[0126] The lifting pin lifting cylinder 5103 is used to drive the lifting pin support block 5104 and the lifting pin 5105 to move synchronously in the height direction, so as to achieve the support and positioning of the connecting rod 3 through the cooperation of the lifting pin 5105 with the end cap 31 of the connecting rod 3; in this embodiment, the cooperation of the lifting pin 5105 with the end cap 31 of the connecting rod 3 includes: the lifting pin 5105 partially or completely extends into the end cap 31.

[0127] Furthermore, in this embodiment, the left connecting rod support assembly 510 and the right connecting rod support assembly 520 have the same structure and are symmetrically arranged about the central axis of the base 100. The central axis of the base 100 is perpendicular to the extension direction of the free end of the left support arm 2203 / right support arm 2211.

[0128] like Figure 3 As shown, the connecting rod clamping unit includes a left connecting rod clamping assembly 410 and a right connecting rod clamping assembly 420, both of which are connected to the base 100 and are used to clamp and fix a connecting rod 3 that is not assembled with the crossbeam structure P.

[0129] Specifically, such as Figure 13 As shown, the left connecting rod clamping assembly 410 / right connecting rod clamping assembly 420 includes:

[0130] The travel cylinder mounting plate 4101 is connected to the base 100;

[0131] The travel cylinder 4102 is mounted on the travel cylinder mounting plate 4101;

[0132] Connector 4104 connects to the piston rod 4103 of the traveling cylinder 4102; preferably, connector 4104 is a floating connector to reduce the eccentric force on the cylinder during movement and make the mechanism run smoothly.

[0133] Travel cylinder adapter block 4105, which connects to the connector 4104;

[0134] The travel cylinder slide rail 4106 is mounted on the base 100 and extends in a direction perpendicular to the extension direction of the left support arm 2203 / right support arm 2213.

[0135] The cylinder sliding mounting plate 4107 is slidably engaged with the travel cylinder slide rail 4106 via a slider, and is also connected to the travel cylinder adapter block 4105.

[0136] The gripper cylinder 4108 is mounted on the cylinder sliding mounting plate 4107;

[0137] The gripper 4109 is connected to the power output end of the gripper cylinder 4108 and opens and closes under the action of the gripper cylinder 4108 to clamp the end cap 31 of the connecting rod 3 and release the clamped end cap 31 of the connecting rod 3.

[0138] The travel cylinder limit block 4110 is mounted on the base 100 and is used to limit the travel stroke of the travel cylinder 4102.

[0139] And a protective cover 4111, which is installed on the piston rod 4103 and / or the slide rail 4106 of the traveling cylinder 4102, to prevent welding slag from splashing and avoid damage to the components.

[0140] The traveling cylinder 4102, through the linear motion of its piston rod 4103, drives the connector 4104, the cylinder sliding mounting plate 4107, and the gripper cylinder 4108 to move synchronously towards / away from the connecting rod 3 supported by the connecting rod support unit along the traveling cylinder slide rail 4106. When it moves to a predetermined position in the direction of the connecting rod 3, the gripper cylinder 4108 drives the gripper 4109 to open first and then close to clamp the end cap 31 of the connecting rod 3, or the gripper cylinder 4108 drives the gripper 4109 to open to release the clamped end cap 31 of the connecting rod 3. Then, the traveling cylinder 4102, through the linear motion of its piston rod, drives the connector 4104, the cylinder sliding mounting plate 4107, and the gripper cylinder 4108 to move synchronously along the traveling cylinder slide rail 4106 to return to the initial position.

[0141] Furthermore, in this embodiment, the left connecting rod clamping assembly 410 and the right connecting rod clamping assembly 420 have the same structure and are symmetrically arranged about the central axis of the base 100. The central axis of the base 100 is perpendicular to the extension direction of the free end of the left support arm 2203 / right support arm 2211.

[0142] like Figure 3 As shown, the end support unit includes: a left end support assembly 610 and a right end support assembly 620 of the crossbeam, both of which are connected to the base 100 and correspond to the positions of the left side portion L and the right side portion R of the crossbeam structure P, respectively, and are used to support the left end P1 and the right end P2 of the crossbeam structure P, respectively.

[0143] Among them, such as Figure 14 As shown, the left end support assembly 610 / right end support assembly 620 of the crossbeam includes:

[0144] An end support mounting base 6101 is connected to the base 100, and a U-shaped groove 6102 is formed on the end support mounting base 6101.

[0145] A beam support block 6103 is connected to the end support mounting base 6101 and is located in the U-shaped slot 6102, used to support the end of the beam structure P.

[0146] And an end L-shaped support block 6104, which is connected to the end support mounting base 6101, for supporting the L-shaped bracket 6 at the end of the beam structure P; preferably, there are two end L-shaped support blocks 6104, which are located on both sides of the U-shaped groove 6102 respectively.

[0147] Example 2:

[0148] The only difference between this embodiment and Embodiment 1 is that, Figure 3 As shown in Figure 15, the tooling also includes:

[0149] A connecting rod detection unit 710 is mounted on the base 100 and is used to detect whether the connecting rod 3 is in a predetermined position and generate a corresponding feedback signal. For example, in this embodiment, the connecting rod detection unit 710 can be an infrared sensor or other photoelectric sensor, which detects whether the connecting rod 3 is in a predetermined position by the on / off state of the photoelectric signal.

[0150] The detection signal receiving unit 730 is mounted on the base 100 and is used to receive the feedback signal generated by the connecting rod detection unit 710 for personnel to analyze and troubleshoot.

[0151] The crossbeam anti-reverse detection unit 720 is installed on the base 100 and is used to detect whether the battery case crossbeam is placed in reverse.

[0152] And an air-blowing cleaning device 800, which is mounted on the base 100, is used to output airflow to blow air onto the surface of the battery case beam and / or other parts of the welding fixture, so as to keep the battery case beam and / or other parts of the welding fixture clean to ensure the quality of subsequent processing.

[0153] Example 3:

[0154] The only difference between this embodiment and embodiment 1 or 2 is that, as shown in Figures 4-5 and 8, the main support unit 220 further includes:

[0155] The detection sensor 2221 is mounted on the mounting plate 2201 via a sensor mounting bracket and other components, and is used to detect whether the crossbeam structure P is placed in place.

[0156] like Figure 3As shown in Figure 14, the left end support assembly 610 / right end support assembly 620 of the crossbeam further includes:

[0157] The end limiting block adapter 6105 is connected to the side of the end support mounting base 6101;

[0158] And an end limiting block 6106, which is connected to the end limiting block adapter block 6105, is used to limit the position of the end of the beam structure P by abutting against the surface of the end of the beam structure P, so as to facilitate loading and unloading.

[0159] like Figure 16 As shown, the lifting unit 210 includes:

[0160] Mounting bracket 2101 is detachably connected to base 100 by screws, bolts and other components;

[0161] The lifting slide rail unit 2102 is connected to the mounting bracket 2101 and extends in the height direction;

[0162] The slider assembly 2103 is slidably engaged with the lifting slide rail unit 2102;

[0163] The lifting cylinder 2104 has a piston rod 2105, which is directly or indirectly connected to the slider assembly 2103. For example, in this embodiment, the piston rod 2105 of the lifting cylinder 2104 is connected to the cylinder adapter block 2106, and the cylinder adapter block 2106 is connected to the slider assembly 2103. In this embodiment, the lifting cylinder 2104 is installed by connecting to the cylinder connecting block 2107, and the cylinder connecting block 2107 is simultaneously connected to the mounting bracket 2101 and / or the base 100.

[0164] The adapter 2108 connects both the slider assembly 2103 and the mounting plate 2201 of the main support unit 220.

[0165] The upper limiting block assembly 2109 is connected to the upper end of the mounting bracket 2101 and is used to limit the upward stroke of the slider assembly 2103.

[0166] And a dustproof baffle 2110 for the lifting unit, which is connected to the mounting bracket 2101 and located on the side and / or top of the slider assembly 2103 and the lifting slide rail unit 2102, to prevent welding slag from splashing and causing damage to the transmission components.

[0167] Therefore, the main support unit 220 and the beam structure P supported by the main support unit 220 can move linearly in the height direction under the drive of the lifting unit 210, through the cooperation of the slider assembly 2103 and the lifting slide rail unit 2102.

[0168] like Figure 17 As shown, the anti-reverse detection unit 720 for the crossbeam includes:

[0169] Anti-reverse detector mounting bracket 7201, which is connected to the base 100;

[0170] The detection component mounting block 7203 is connected to the anti-reverse detector mounting bracket 7201;

[0171] Anti-reverse detection component 7204 (which may be a pin, shaft, or other structure) is mounted on the detection component mounting block 7203 and can move downward under pressure;

[0172] The anti-reverse detection sensor 7206 is connected to the detection element mounting block 7203 and / or the anti-reverse detector mounting bracket 7201 via components such as the sensor mounting plate 7205. It is used to be triggered by the anti-reverse detection element 7204 when the anti-reverse detection element 7204 moves downward, and generates a corresponding feedback signal after being triggered.

[0173] When placing the component, one end of the crossbeam structure P has a pin hole (usually the right end), while the other end does not. If the crossbeam structure P is placed correctly, the anti-reverse detection component 7204 can be directly inserted into the pin hole without being subjected to pressure and thus will not trigger the anti-reverse detection sensor 7206 to generate a signal. Conversely, if the crossbeam structure P is not placed correctly, the anti-reverse detection component 7204 cannot be inserted into the pin hole and will be pressed down by the crossbeam structure P. After moving downward, it will trigger the anti-reverse detection sensor 7206 to generate a signal, which can then be used to perform corresponding operations, such as stopping the operation of related components.

[0174] The tooling operation process in this embodiment is as follows:

[0175] First, the components of the battery casing beam, except for the connecting rod 3, are combined into a whole through welding and other processes. This whole is the beam structure P. At this time, the connecting rod 3 is independent of the beam structure P and has not yet been assembled with the beam structure P.

[0176] Then, the lifting pins 5105 in the left connecting rod support assembly 510 and the right connecting rod support assembly 520 rise to place the connecting rod 3 in the separated state, and make the end cap 31 of the connecting rod 3 engage with the lifting pin 5105. Then, the connecting rod detection unit 710 detects whether the connecting rod 3 is in the predetermined position. If the connecting rod 3 is detected to be in position, the jaws 4109 of the left connecting rod clamping assembly 410 and the right connecting rod clamping assembly 420 move toward the connecting rod 3 and clamp the end cap 31 of the connecting rod 3 to achieve the positioning of the connecting rod 3.

[0177] The lifting unit 210 drives the main support unit 220 to rise to the predetermined position. The robot grabs the crossbeam structure P and places its middle part M in the gap between the guide limit blocks 2219, so that different parts of the crossbeam structure P are supported or positioned accordingly. For the specific support and positioning methods, please refer to the structural function description of the main support unit 220. At the same time, the detection sensor 2221 and the crossbeam anti-reverse detection unit 720 respectively detect whether the crossbeam structure P is in place and whether the crossbeam structure P is installed backwards. After the detection is completed, if the position of the crossbeam structure P is normal, it means that the placement of the part has been completed.

[0178] Furthermore, the intermediate pressing cylinder 3302 drives the intermediate pressing arm 3303 to rotate, so as to press the crossbeam body 1 of the intermediate part M. Then, the lifting unit 210 drives the main support unit 220 and the intermediate pressing component 330 to descend synchronously until the rod 32 of the connecting rod 3 passes through the crossbeam body 1 from the bottom and extends from the upper end face of the crossbeam body 1, so as to complete the assembly of the connecting rod 3 and the crossbeam structure P. At the same time, the left end support component 610 and the right end support component 620 of the crossbeam provide corresponding support to the two ends of the crossbeam structure P that have completed the assembly of the connecting rod 3.

[0179] Then, the left crossbeam pressing assembly 310 and the right crossbeam pressing assembly 350 respectively drive the first L-shaped pressing block 3104 and the first crossbeam pressing block 3105 to press down through their respective first pressing arms 3103, so as to press down the corresponding parts of the left part L and the right part R respectively.

[0180] Furthermore, the left connecting rod pressing assembly 320 and the right connecting rod pressing assembly 340 respectively drive the first pressing plate 3205, the second pressing plate 3206, and the connecting rod pressing block 3207 to press down through their respective second pressing arms 3203, so as to press down the corresponding parts of the left part L and the right part R respectively.

[0181] The gripper 4109 opens to release the clamped end cap 31, and then retracts to the initial position under the drive of the travel cylinder 4102;

[0182] Weld the joint between the connecting rod 3 and the crossbeam structure P (i.e., the position where the connecting rod 3 passes through the crossbeam structure P) to obtain the battery casing crossbeam;

[0183] After welding is completed, release the pressure exerted on the beam structure P and the connecting rod 3 by the left crossbeam pressing assembly 310, the right crossbeam pressing assembly 350, the left connecting rod pressing assembly 320, and the right connecting rod pressing assembly 340.

[0184] The lifting unit 210 drives the main support unit 220 and the intermediate pressing component 330 to rise synchronously. After reaching the position, the pressure of the intermediate pressing component 330 on the crossbeam structure P is released. The robot takes away the welded battery shell crossbeam, and the air blowing cleaning device 800 blows air onto the tooling to remove the welding slag.

[0185] Example 4:

[0186] This embodiment provides a welding method for a battery casing crossbeam, which can be achieved using the welding fixture for the battery casing crossbeam described in any one of embodiments 1-3. Specifically, the welding method includes the following steps:

[0187] S1. The crossbeam structure P of the battery casing crossbeam is obtained through processes such as welding.

[0188] S2. The connecting rod 3 of the battery case beam is supported by the connecting rod support unit, and the connecting rod 3 of the battery case beam is clamped by the connecting rod clamping unit.

[0189] Specifically, it includes the following steps:

[0190] The lifting pins 5105 in the left connecting rod support assembly 510 and the right connecting rod support assembly 520 are raised, and the end cap 31 of the connecting rod 3 cooperates with the lifting pins 5105 to support the connecting rod 3.

[0191] The connecting rod detection unit 710 detects whether the connecting rod 3 is in a predetermined position. If the connecting rod 3 is detected to be in position, the traveling cylinder 4102 of the left connecting rod clamping assembly 410 and the right connecting rod clamping assembly 420 drives the gripper 4109 to move toward the connecting rod 3 and clamp the end cap 31 of the connecting rod 3 to achieve the positioning of the connecting rod 3.

[0192] S3. Complete the assembly of the crossbeam structure P and the connecting rod 3, which specifically includes the following steps:

[0193] The lifting unit 210 drives the main support unit 220 to rise to the predetermined position. The robot grabs the beam structure P and places its middle part M in the gap between the guide limit blocks 2219, so that different parts of the beam structure P are supported and positioned by the left support component, the right support component, the middle support component, and the end support unit respectively.

[0194] The detection sensor 2221 and the crossbeam anti-reverse detection unit 720 respectively detect whether the crossbeam structure P is in place and whether the crossbeam structure P is installed backwards.

[0195] The intermediate pressing cylinder 3302 drives the intermediate pressing arm 3303 to rotate, so as to press the crossbeam body 1 of the intermediate part M.

[0196] The lifting unit 210 drives the main support unit 220 and the intermediate pressing component 330 to descend synchronously until the rod 32 of the connecting rod 3 passes through the main body of the crossbeam 1 from the bottom and extends out from the upper end face of the main body of the crossbeam 1 to complete the assembly of the connecting rod 3 and the crossbeam structure P.

[0197] S4. Apply pressure to the beam structure P and connecting rod 3, which specifically includes the following steps:

[0198] The left crossbeam pressing assembly 310 and the right crossbeam pressing assembly 350 respectively drive the first L-shaped pressing block 3104 and the first crossbeam pressing block 3105 to press down through their respective first pressing arms 3103, so as to press down the corresponding parts of the left part L and the right part R respectively.

[0199] The left connecting rod pressing assembly 320 and the right connecting rod pressing assembly 340 respectively drive the first pressing plate 3205, the second pressing plate 3206, and the connecting rod pressing block 3207 to press down through their respective second pressing arms 3203, so as to press down the corresponding parts of the left part L and the right part R respectively.

[0200] S5. Welding is performed at the mating point between the connecting rod 3 and the crossbeam structure P (i.e., the position where the connecting rod 3 passes through the crossbeam structure P), specifically including the following steps:

[0201] The gripper 4109 opens to release the clamped end cap 31;

[0202] The connecting rod 3 and the crossbeam structure P are welded together using welding methods such as MAG (Metal Active Gas Arc Welding) to obtain the battery casing crossbeam.

[0203] S6. Remove the battery casing crossbeam, which includes the following steps:

[0204] Release the pressure exerted on the beam structure P and the connecting rod 3 by the left crossbeam pressing assembly 310, the right crossbeam pressing assembly 350, the left connecting rod pressing assembly 320, and the right connecting rod pressing assembly 340.

[0205] The lifting unit 210 drives the main support unit 220 and the intermediate pressing component 330 to rise synchronously. After reaching the position, the pressure of the intermediate pressing component 330 on the crossbeam structure P is released. The robot takes away the welded battery shell crossbeam, and the air blowing cleaning device 800 blows air onto the tooling to remove the welding slag.

[0206] In summary, the structural design of the welding fixture in this application fully conforms to the structural characteristics of the battery casing beam. It can position different parts of the battery casing beam through different support and clamping units, ensuring assembly accuracy and guaranteeing the product quality of subsequent welding.

[0207] Furthermore, due to the considerable length of the connecting rod, misalignment can cause the crossbeam structure and the connecting rod to malfunction, preventing the connecting rod from passing through the crossbeam structure and resulting in assembly failure. To address this issue, this application first positions the connecting rod using a lifting pin, and then clamps the end cap of the connecting rod with grippers to ensure it remains upright, allowing it to pass smoothly through the crossbeam structure and complete the assembly.

[0208] Meanwhile, since the fit clearance between the hole for the connecting rod to pass through on the crossbeam structure and the connecting rod is small, and the crossbeam structure has certain welding deformation, it will also cause obstacles to the assembly of the two. Therefore, after placing the crossbeam structure on the main support unit, this application first presses it down through the intermediate pressing component to ensure the stability of the crossbeam structure position. Then, the lifting unit drives the crossbeam structure to move down smoothly, so that the hole for the connecting rod to pass through on the crossbeam structure is accurately aligned with the connecting rod, so as to quickly complete the assembly of the two and avoid the occurrence of jamming (i.e. the connecting rod cannot pass through the crossbeam structure).

[0209] It should be noted that, in this document, terms such as "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0210] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A welding fixture for a battery casing crossbeam, characterized in that, The battery casing crossbeam includes a crossbeam structure and a connecting rod. The crossbeam structure includes a crossbeam body. The connecting rod includes a rod body with its top passing through the crossbeam body and an end cap connected to the rod body. The end cap is located at the bottom of the crossbeam body and outside the crossbeam body. The welding fixture includes: Base; The main positioning unit is installed on the base and is used to support and position the crossbeam structure of the battery casing beam. A pressure unit, mounted on the base, is used to apply pressure to the beam structure of the battery case beam; And a connecting rod support unit, which is mounted on the base and is used to support the unassembled connecting rod; The main positioning unit includes: a main support unit, which is used to support the entire beam structure; And a lifting unit, which is connected to the main support unit and is used to drive the main support unit and the battery casing beam. The beam structure moves linearly in the height direction; The connecting rod support unit includes: a left connecting rod support assembly and a right connecting rod support assembly, both of which are connected to the base and are used to support a connecting rod that is not assembled with the crossbeam structure. When the crossbeam structure and connecting rod are not assembled, the pressing unit applies pressure to the crossbeam structure placed on the main support unit; and the lifting unit drives the main support unit and the crossbeam structure to move down as a whole to assemble the crossbeam structure and connecting rod. The main support unit includes: Mounting plate; The left-side support assembly is used to support and position the left-side portion of the beam structure; The right-side support assembly is used to support and position the right-side portion of the beam structure; And the central support assembly, which is used to support and position the middle part of the beam structure; The left-side support component includes: The left support arm is mounted on the mounting plate; The left crossbeam support member has one end connected to the left support arm and the other end extending away from the left support arm, and is used to support the left side of the crossbeam structure. The first L-shaped positioning pin adapter block is connected to the left support arm; First L-shaped locating pin mounting block, which is connected to the first L-shaped locating pin adapter block, is used to install the first L-shaped locating pin of an L-shaped bracket that can pass through the beam structure in the height direction. The first cover plate positioning pin adapter block is connected to the left support arm; And a first cover plate positioning pin mounting block, which is connected to the first cover plate positioning pin adapter block, for installing the first cover plate positioning pin, the first cover plate positioning pin being used to pass through the cover plate of the left side of the crossbeam structure in the height direction / and simultaneously pass through the cover plate of the left side of the crossbeam structure and the crossbeam body in the height direction.

2. The welding fixture as described in claim 1, characterized in that, The left-side support assembly further includes a left-side auxiliary support member, which is connected to the base and is used to support the left side of the beam structure.

3. The welding fixture as described in claim 1, characterized in that, The right-side support component includes: The right support arm is mounted on the mounting plate; The right crossbeam support member has one end connected to the right support arm and the other end extending away from the right support arm, and is used to support the right side of the crossbeam structure. The second L-shaped positioning pin adapter block is connected to the right support arm; The second L-shaped locating pin mounting block, which connects to the second L-shaped locating pin adapter block, is used to install the second L-shaped locating pin of another L-shaped bracket that can pass through the beam structure in the height direction; The second cover plate positioning pin adapter block is connected to the right support arm; And a second cover plate positioning pin mounting block, which connects to the second cover plate positioning pin adapter block, for installing the second cover plate positioning pin, the second cover plate positioning pin being used to pass through the cover plate of the right side of the crossbeam structure in the height direction / and can pass through the cover plate of the right side of the crossbeam structure and the crossbeam body simultaneously in the height direction.

4. The welding fixture as described in claim 3, characterized in that, The right-side support assembly further includes a right-side auxiliary support component, which is connected to the second L-shaped component positioning pin adapter block, and is used to support the right side of the beam structure.

5. The welding fixture as described in claim 1, characterized in that, The central support component includes: The beam limiting unit, connected to the mounting plate, is used to limit the position of the middle part of the beam structure, so that the beam structure... The structure moves only in the vertical direction; The beam limiting unit includes two parallel guide limiting blocks, both of which are connected to the mounting plate, and the two... A gap is formed between the guide limit blocks to accommodate the middle part of the entire / partial crossbeam structure.

6. The welding fixture as described in claim 1, characterized in that, The pressing unit includes: The left crossbeam pressing assembly and the right crossbeam pressing assembly are both connected to the base and are used to apply pressure to the left and right parts of the crossbeam structure that have been assembled with connecting rods, respectively. The left connecting rod pressing assembly and the right connecting rod pressing assembly are both connected to the base and are used to apply pressure to the connecting rods on the left and right sides of the beam structure that have been assembled. And an intermediate pressure assembly, which is connected to the base, for applying pressure to the main body of the beam in the middle part of the beam structure.

7. The welding fixture as described in claim 6, characterized in that, The left crossbeam pressing assembly / right crossbeam pressing assembly includes: A first cylinder mounting bracket is connected to the base; The first cylinder is connected to the first cylinder mounting bracket; The first pressure arm is connected to the power output end of the first cylinder and rotates under the drive of the first cylinder. The first L-shaped pressure block is connected to the first pressure arm and is used to apply pressure to the L-shaped bracket of the beam structure under the drive of the first pressure arm. And a first crossbeam pressure block, which is connected to the first pressure arm, for pressing the crossbeam structure under the action of the first pressure arm. The main beam of the structure is subjected to pressure.

8. The welding fixture as described in claim 6, characterized in that, The left connecting rod pressing assembly / right connecting rod pressing assembly includes: A second cylinder mounting bracket is connected to the base; The second cylinder is connected to the second cylinder mounting bracket; The second pressure arm is connected to the power output end of the second cylinder and rotates under the drive of the second cylinder; The lower pressure component adapter block connects to the second pressure arm; The first pressure plate, connected to the lower pressure adapter block, is used to press against the crossbeam structure under the action of the second pressure arm. Pressure applied to the main beam and / or L-shaped support; The second pressure plate, connected to the lower pressure adapter block, is used to press against the crossbeam structure under the action of the second pressure arm. The connecting rod reinforcing plate applies pressure. And a connecting rod pressure block, which connects to the lower pressure member adapter block, for use under the drive of the second pressure arm to press the connecting rod. The portion of the rod extending from the upper end face of the main body of the crossbeam applies pressure.

9. The welding fixture as described in claim 6, characterized in that, The intermediate pressure-down component includes: Middle-mounted lower cylinder mounting bracket; A middle pressure cylinder, which is connected to the middle pressure cylinder mounting bracket; The intermediate downward pressure arm is connected to the power output end of the intermediate downward pressure cylinder, and is driven by the intermediate downward pressure cylinder. Rotate; The intermediate pressure adapter block connects to the intermediate pressure arm; The lower pressure beam connects to the intermediate lower pressure adapter block; And a lower pressure block, which is connected to the lower pressure beam, is used to apply pressure to the crossbeam structure under the drive of the intermediate lower pressure arm. The main beam in the middle section is subjected to pressure.

10. The welding fixture as described in claim 1, characterized in that, The left connecting rod support assembly / right connecting rod support assembly includes: The lifting pin lifting cylinder mounting block is installed on the base; A lifting pin lifting cylinder, which is connected to the lifting pin lifting cylinder mounting block; A lifting pin support block, which is connected to the piston rod of the lifting pin lifting cylinder; And a lifting pin, which is mounted on the lifting pin support block; The lifting pin lifting cylinder is used to drive the lifting pin support block and the lifting pin to move synchronously in the height direction, so as to achieve the support and positioning of the connecting rod through the cooperation of the lifting pin and the connecting rod.

11. The welding fixture as described in claim 1, characterized in that, The welding fixture also includes: a connecting rod clamp. The unit, which is mounted on the base, is used to clamp and fix the unassembled connecting rod; The connecting rod clamping unit includes a left connecting rod clamping assembly and a right connecting rod clamping assembly, both of which are connected to the base and are used to clamp and fix a connecting rod that is not assembled with the crossbeam structure.

12. The welding fixture as described in claim 11, characterized in that, The left connecting rod clamping assembly / right connecting rod clamping assembly includes: A travel cylinder mounting plate, which is connected to the base; A travel cylinder, which is mounted on the travel cylinder mounting plate; A connector that connects to the piston rod of the traveling cylinder; A travel cylinder adapter block, which connects to the aforementioned connector; The travel cylinder slide rail is mounted on the base; The cylinder sliding mounting plate slides with the travel cylinder slide rail via a slider, and is also connected to the travel cylinder. Cylinder adapter block; A gripper cylinder, which is mounted on a cylinder sliding mounting plate; And a gripper, which is connected to the power output end of the gripper cylinder, and opens and closes under the action of the gripper cylinder, so as to... Clamp the connecting rod / Release the clamped connecting rod.

13. The welding fixture as described in claim 1, characterized in that, The welding fixture also includes: an end support unit. The element is mounted on the base and is used to support the two ends of the crossbeam structure with the connecting rods already assembled. The end support unit includes: a left end support assembly for the crossbeam and a right end support assembly for the crossbeam, both of which are connected to a base. Used to support the left and right ends of the beam structure respectively.

14. The welding fixture as described in claim 13, characterized in that, The left end support assembly of the crossbeam / the right end of the crossbeam The end support components include: An end support mounting base is provided, which is connected to the base, and a U-shaped groove is formed on the end support mounting base. mouth; A crossbeam support block, which connects to the end support mounting base and is located within the U-shaped groove, is used for... The ends of the beam structure are supported; An L-shaped support block at the end of the beam structure is connected to the mounting base of the end support component and is used to support the L-shaped bracket at the end of the beam structure. The end limiting block adapter block is connected to the side of the end support mounting base; And an end-limiting block, which connects to the end-limiting block adapter block, for abutting against the end surface of the beam structure. The position of the ends of the beam structure is restricted in this way.

15. The welding fixture as described in claim 1, characterized in that, The welding fixture also includes a connecting rod detection unit, which is mounted on the base and is used to detect whether the connecting rod is in a predetermined position and generate a corresponding feedback signal. A detection signal receiving unit, which is mounted on the base, is used to receive feedback signals generated by the connecting rod detection unit; And a crossbeam anti-reverse detection unit, which is installed on the base and is used to detect whether the battery case crossbeam is placed backwards.

16. The welding fixture as described in claim 15, characterized in that, The anti-reverse detection unit for the crossbeam includes: An anti-reverse detector mounting bracket, which is connected to the base; A detection component mounting block, which is connected to the anti-reverse detector mounting bracket; An anti-reverse detection element is mounted on the detection element mounting block and can move downward under pressure; Anti-reverse detection sensor, which connects to the detection element mounting block and / or anti-reverse detector mounting bracket, is used for mounting on the anti-reverse detection element. When moving downwards, it is triggered by the anti-reverse detection device, and a corresponding feedback signal is generated after the triggering.

17. A method for welding a battery casing crossbeam, wherein the battery casing according to any one of claims 1-16 is used. The welding fixture for the crossbeam is characterized by, The welding method includes the following steps: Obtain the crossbeam structure of the battery casing crossbeam; Support and clamp the connecting rod of the battery casing beam; Complete the assembly of the beam structure and connecting rods; Apply pressure to the beam structure and connecting rods; Welding is performed at the joints of the connecting rod and the crossbeam structure to obtain the battery casing crossbeam.

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