Centering and positioning clamp and method for battery tray

Abstract

The invention discloses a centering positioning clamp and method for a battery tray, and relates to the field of tool clamps, and the centering positioning clamp comprises a clamp main beam, a clamping plate and a clamping jaw support. The invention further discloses a positioning method of the centering positioning clamp for the battery tray. The positioning method comprises the following steps of clamp in-place, pre-clamping, centering adjustment and final clamping. The movable clamping jaw, the in-place switch plate and the clamping plate are adopted to form an angle detection mechanism, the relative position of the clamp and the battery tray is judged by judging the vertical state of the movable clamping jaw after the clamp is pre-clamped, the battery tray is subjected to small acting force in the pre-clamping process, abrasion caused by movement of the battery tray cannot be caused, and meanwhile the clamping efficiency is improved. After the positions of the clamp and the battery tray are judged, the positions of the movable clamping jaw, the clamping plate and other structures are adjusted to ensure that the center positions of the clamp and the battery tray are calibrated.

Description

Technical Field

[0001] This invention relates to the field of tooling fixtures, and in particular to a centering and positioning fixture and method for a battery tray. Background Technology

[0002] As the load-bearing structure for the power batteries of new energy vehicles, the processing precision of the battery tray directly affects the assembly quality of the battery module and driving safety.

[0003] Currently, existing battery tray centering and positioning fixtures typically employ a bidirectional synchronous clamping mechanism. This mechanism uses a cylinder or motor to drive the left and right clamping plates to close towards the center, and then uses the clamping jaws fixed on the clamping plates to force the tray to a preset theoretical center position. However, in practical applications, this traditional centering method suffers from problems due to dimensional tolerances in the incoming battery trays and random deviations in the loading position. During the clamping process, the tray must be forcibly pushed to generate displacement, resulting in severe sliding friction between the tray surface and the clamping jaws. This can easily cause scratches, indentations, or even micro-cracks on the aluminum alloy tray surface. Furthermore, the centering jaws simultaneously perform the dual functions of pushing the tray for centering and finally clamping and fixing it, leading to the coupling of clamping force and centering force, which is difficult to control precisely.

[0004] Therefore, it is necessary to invent a centering and positioning fixture and method for battery trays to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a centering and positioning fixture and method for a battery tray, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a centering and positioning fixture for a battery tray, comprising: The main beam of the clamp has a sliding connecting plate installed underneath it; The clamping plate has two sets of symmetrically installed below the connecting plate, and both clamping plates can slide. The top of each clamping plate is fixedly installed with a positioning arm, and the ends of the two positioning arms that are close to each other are fixedly installed with a positioning slide rod. A centering bracket is installed between the two positioning arms. Two positioning plates are fixedly installed on the outer side of the centering bracket. The middle of each of the two positioning plates is provided with a positioning slide groove that matches the positioning slide rod. A centering cylinder is fixedly installed on the middle of one side of the centering bracket, and the centering cylinder is fixedly installed on the lower surface of the connecting plate. The gripper support has multiple grippers, each fixedly installed at the bottom of the clamping plate. A movable gripper is rotatably mounted at the bottom of the gripper support via a pin. A position switch is fixedly installed at the outer top of the movable gripper. A pressure plate is fixedly installed at the bottom of the gripper support. When the movable gripper is perpendicular to the gripper support, the contact of the position switch is squeezed by the pressure plate. The pressure plate and the position switch form a movable gripper angle detection mechanism to determine the alignment status of the two sets of gripper supports.

[0007] Preferably, it also includes a lead screw sleeve, which is fixedly installed in the middle of the upper surface of the connecting plate; The centering screw is rotatably mounted below the main beam of the fixture via bearings and passes through the screw sleeve; The centering motor is fixedly installed on the outside of the main beam of the fixture, and its output shaft is fixedly connected to one end of the centering lead screw. The centering motor, the centering lead screw, and the lead screw sleeve form a position adjustment mechanism for the connecting plate to adjust the position of the connecting plate and the clamping plate.

[0008] Preferably, it also includes a positioning slide, which is slidably mounted on the outside of the gripper support. The bottom end of the positioning slide is rotatably mounted with a connecting arm via a pin, and the bottom end of the connecting arm is movably connected to the middle of the outer side of the movable gripper via a pin. A top spring is installed between the top end of the positioning slide and the top end of the outer side wall of the gripper support. The top spring, the positioning slide, and the connecting arm form a thrust mechanism to provide a force in the direction of the battery tray to the movable gripper.

[0009] Preferably, it also includes a limiting hole, which is provided through the top outer side of the positioning slide; A limiting rod passes through the middle of the gripper support and is adapted to the limiting hole. An armature is fixedly installed at one end of the limiting rod. The armature is located inside the gripper support, and a spring is provided between the armature and the inner wall of the gripper support. The spring is used to provide the armature and the limiting rod with outward sliding force so that the limiting rod is inserted into the limiting hole. When the movable gripper is perpendicular to the gripper support, the positioning slide is at the lowest point. When the positioning slide is at the lowest point, the limiting rod is inserted into the limiting hole to lock the position of the positioning slide and the movable gripper. An electromagnet is fixedly installed inside the gripper support. The electromagnet is used to attract the armature and to separate the limiting rod from the limiting hole to release the limiting of the movable gripper.

[0010] Preferably, it also includes a slot that extends through the middle of the bottom end of the movable gripper; The clamping block is slidably installed in the slot; A clamping cylinder is fixedly installed on the outer bottom end of the movable gripper and its output end is fixedly connected to one end of the clamping block. The clamping cylinder is used to provide thrust to the clamping block to achieve clamping and fixing of the battery tray.

[0011] Preferably, it also includes spherical balls, which are installed on the inner bottom end of the movable gripper. The spherical balls are used to conform to the battery tray to reduce contact friction between the movable gripper and the battery tray. A limiting slot is provided on the inner top of the movable gripper and is adapted to the pressure plate. The limiting slot and the pressure plate together form a limiting mechanism for the rotation angle of the movable gripper.

[0012] Preferably, it also includes positioning airbags, which are provided in two sets and respectively installed in the middle of the two clamps, and the positioning airbags in both sets are provided as multiple airbags distributed at equal intervals.

[0013] Preferably, it also includes airbag supports, which are provided in two and located on the outside of the two clamps respectively. The two sets of positioning airbags are fixedly installed on the inside of the two airbag supports respectively, and airbag cylinders are installed between the two airbag supports and the two clamps.

[0014] Preferably, it also includes four lifting lugs, which are respectively fixedly installed at the four corners of the upper surface of the main beam of the clamp.

[0015] A positioning method for a centering and positioning fixture for a battery tray includes the following steps: Step 1: Position the clamp. Use hoisting equipment to move the entire clamp above the battery tray and drive the entire clamp down until the movable jaws at the bottom of the two clamping plates reach both sides of the battery tray. Step 2: Pre-clamping. The centering cylinder drives the two clamping plates to move toward the battery tray. The clamping plates drive the movable claws to move and contact the side of the battery tray. During the contact process, the movable claws are flipped under the action of the top spring, positioning slide and connecting arm and remain flexibly in contact with the battery tray. Step 3: Centering and adjustment. After the clamping plate moves into position, determine whether the movable gripper is in a vertical state by checking whether the position switch is triggered. Then, determine whether the entire clamp and the battery tray are aligned based on the state of the two sets of movable grippers. Finally, adjust the position of the connecting plate, clamping plate, and movable grippers according to the alignment status until the entire clamp coincides with the center of the battery tray. Step 4: Final clamping. Drive the clamping cylinder to push the clamping block out. The clamping block presses against the outer side beam of the battery tray, completing the final clamping and fixing of the battery tray.

[0016] The technical effects and advantages of this invention are as follows: 1. This invention employs an angle detection mechanism composed of movable grippers, a positioning switch plate, and a clamping plate. The relative position of the clamp and battery tray is determined by judging the vertical state of the movable grippers after pre-clamping. During pre-clamping, the battery tray is subjected to minimal force, preventing movement and wear. Simultaneously, after determining the position of the clamp and battery tray, the positions of the movable grippers and clamping plate are adjusted to ensure center alignment between the clamp and battery tray. This combination of structures transforms the alignment judgment criterion from "clamping plate position" to "the contact state between the grippers and the tray," effectively avoiding "false alignment" caused by tray deformation or dimensional deviations, and significantly improving alignment reliability. 2. This invention employs a positioning structure consisting of a positioning slide, a connecting arm, and a gripper support to form a movable gripper. After the device is aligned, the positioning slide is locked in place by a locking mechanism consisting of a limiting rod, a limiting hole, and an electromagnet, thereby switching between flexible contact and rigid clamping states. In conjunction with a final clamping mechanism consisting of a clamping cylinder and a clamping block, the battery pusher is finally clamped after alignment. This avoids wear caused by movement of the battery tray during alignment while ensuring the stability of the final clamping. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 This is a side view of the overall structure of the present invention.

[0019] Figure 3 This is a schematic diagram of the connecting plate structure of the present invention.

[0020] Figure 4 This is a schematic diagram of the clamping plate structure of the present invention.

[0021] Figure 5 This is a schematic diagram of the positioning plate structure of the present invention.

[0022] Figure 6 This is a schematic diagram of the clamping plate and gripper support structure of the present invention.

[0023] Figure 7 This is a schematic diagram of the gripper support structure of the present invention. Figure 1 .

[0024] Figure 8 This is a schematic diagram of the gripper support structure of the present invention. Figure 2 .

[0025] Figure 9 This is a schematic diagram of the gripper support structure of the present invention. Figure 3 .

[0026] In the diagram: 1. Main beam of the clamp; 2. Clamping plate; 3. Gripper support; 4. Positioning airbag; 11. Connecting plate; 12. Screw sleeve; 15. Lifting lug; 13. Centering screw; 14. Centering motor; 21. Positioning arm; 22. Centering bracket; 31. Movable gripper; 32. Positioning slide; 33. Connecting arm; 34. Positioning switch; 41. Airbag bracket; 42. Airbag cylinder; 211. Positioning slide rod; 221. Positioning plate; 222. Positioning slide groove; 223. Centering cylinder; 311. Slot; 312. Clamping block; 313. Clamping cylinder; 314. Limiting slot; 315. Pressure plate; 316. Spherical ball; 321. Limiting hole; 322. Limiting rod; 323. Armature; 324. Electromagnet; 325. Top spring. Detailed Implementation

[0027] 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.

[0028] like Figures 1 to 9 As shown, the centering and positioning fixture for a battery tray provided by the present invention is essentially a positioning fixture that can automatically center the battery tray and avoid wear caused by forced displacement of the battery tray during the centering process.

[0029] In terms of specific structural installation, the structural body can be constructed according to the inventive concept of this embodiment. In this embodiment, no special limitations are imposed.

[0030] In this embodiment, a centering and positioning fixture for a battery tray includes: The clamp main beam 1 has a sliding connecting plate 11 installed below it. The clamp main beam 1 is the basic load-bearing component of the present invention and adopts a rectangular hollow steel structure. The lead screw sleeve 12 is fixedly installed in the middle of the upper surface of the connecting plate 11; The centering screw 13 is rotatably mounted below the main beam 1 of the fixture via a bearing and passes through the screw sleeve 12; The centering motor 14 is fixedly installed on the outside of the main beam 1 of the fixture, and its output shaft is fixedly connected to one end of the centering lead screw 13. The centering motor 14, the centering lead screw 13 and the lead screw sleeve 12 form the position adjustment mechanism of the connecting plate 11 to adjust the position of the connecting plate 11 and the clamping plate 2. The centering motor 14 is a servo motor equipped with an absolute encoder. When the centering motor 14 rotates, it drives the centering lead screw 13 to rotate. The rotational motion is converted into the linear motion of the connecting plate 11 through the lead screw sleeve 12, thereby realizing the precise adjustment of the position of the connecting plate 11 and the clamping plate 2.

[0031] The lifting lugs 15 are provided in four parts and are fixedly installed at the four corners of the upper surface of the main beam 1 of the clamp. The lifting lugs 15 are used to connect external lifting equipment (cranes, gantry robots, etc.) to achieve automated handling and positioning.

[0032] The clamping plate 2 has two sets of symmetrically installed below the connecting plate 11, and both clamping plates 2 are slidable. The top of each clamping plate 2 is fixedly installed with a positioning arm 21, and the end of each positioning arm 21 that is close to each other is fixedly installed with a positioning slide rod 211. A centering bracket 22 is installed between the two positioning arms 21. Two positioning plates 221 are fixedly installed on the outer side of the centering bracket 22. The middle of each positioning plate 221 is provided with a positioning slide groove 222 that is adapted to the positioning slide rod 211. A centering cylinder 223 is fixedly installed in the middle of one side of the centering bracket 22, and the centering cylinder 223 is fixedly installed on the lower surface of the connecting plate 11. The positioning slide rod 211 and the positioning slide groove 222 slide in cooperation. When the centering cylinder 223 drives the centering bracket 22 to move, the two clamping plates 2 move synchronously and smoothly towards or away from each other through the cooperation of the positioning slide groove 222 and the positioning slide rod 211.

[0033] The gripper support 3 has multiple grippers, all of which are fixedly installed at the bottom of the clamping plate 2. The gripper support 3 has a U-shaped structure and is made of QT500-7 ductile iron. The interior is hollow to install the electromagnet 324 and armature assembly, and the exterior is provided with a vertical guide rail. The spacing between adjacent gripper supports 3 is determined according to the length of the pallet. The bottom end of the gripper support 3 is rotatably mounted with a movable gripper 31 via a pin. The upper part of the movable gripper 31 is provided with a pin hole, the middle part is provided with a connecting arm 33 mounting ear seat, and the bottom is provided with a through slot 311. A retaining spring is installed at the end of the pin to limit axial movement. A position switch 34 is fixedly installed on the top outer side of the movable gripper 31, and a pressure plate 315 is fixedly installed on the bottom of the gripper support 3. When the movable gripper 31 is perpendicular to the gripper support 3, the contact of the position switch 34 is squeezed by the pressure plate 315. The pressure plate 315 and the position switch 34 form an angle detection mechanism for the movable gripper 31 to determine the alignment status of the two sets of gripper supports 3. The position switch 34 is an Omron TL-W5MC1 type inductive proximity switch with a detection distance of 5mm and NPN normally open output. When the movable gripper 31 rotates to a vertical state relative to the gripper support 3, the contact of the position switch 34 is aligned with the pressure plate 315 and squeezed, triggering the switch to output a signal.

[0034] The positioning slide 32 is mounted on the outside of the gripper support 3 and can slide up and down. The positioning slide 32 is a rectangular slider structure, made of copper alloy material, and has self-lubricating properties. The outside of the positioning slide 32 is provided with a guide groove that cooperates with the guide rail of the gripper support 3. A connecting arm 33 is rotatably mounted on the bottom end of the positioning slide 32 via a pin, and the bottom end of the connecting arm 33 is movably connected to the middle of the outer side of the movable gripper 31 via a pin. A top spring 325 is installed between the top end of the positioning slide 32 and the top end of the outer side wall of the gripper support 3. The top spring 325, the positioning slide 32, and the connecting arm 33 form a thrust mechanism to provide a force to the movable gripper 31 in the direction of the battery tray. The top spring 325 is sleeved on the guide post, with its top end abutting against the gripper support 3 and its bottom end pressing against the positioning slide 32, always applying a downward thrust to the positioning slide 32. The top spring 325, the positioning slide 32, and the connecting arm 33 together form a thrust mechanism, which transmits the thrust to the movable gripper 31 through the connecting arm 33, so that the movable gripper 31 always tends to fit in the direction of the battery tray, but remains flexible to avoid forcibly pushing the tray.

[0035] A limiting hole 321 is provided through the top outer side of the positioning slide 32; A limiting rod 322 passes through the middle of the gripper support 3 and is adapted to the limiting hole 321. An armature 323 is fixedly installed at one end of the limiting rod 322. The armature 323 is located inside the gripper support 3, and a spring is provided between the armature 323 and the inner wall of the gripper support 3. The spring provides the armature 323 and the limiting rod 322 with the force to slide outward so that the limiting rod 322 is inserted into the limiting hole 321. When the movable gripper 31 is perpendicular to the gripper support 3, the positioning slide 32 is at the lowest point. When the positioning slide 32 is at the lowest point, the limiting rod 322 is inserted into the limiting hole 321 to lock the position of the positioning slide 32 and the movable gripper 31. The spring is a compression spring, which is used to provide the armature 323 and the limiting rod 322 with the force to slide outward so that the limiting rod 322 maintains the tendency to be inserted into the limiting hole 321 when there is no external force. Electromagnet 324 is fixedly installed inside the gripper support 3. Electromagnet 324 is used to attract armature 323 and to separate the limiting rod 322 from the limiting hole 321, thereby releasing the limitation of the movable gripper 31. When the electromagnet 324 is energized, it generates magnetic force, attracts armature 323, compresses the spring, and drives the limiting rod 322 to exit from the limiting hole 321, thus releasing the lock. When the movable gripper 31 rotates to a vertical state relative to the gripper support 3, the positioning slide 32 is pushed to the lowest point by the top spring 325. At this time, the limiting hole 321 and the limiting rod 322 are aligned. Under the action of the spring, the limiting rod 322 automatically inserts into the limiting hole 321, locking the positioning slide 32 in the current position. Since the positioning slide 32 is locked, the vertical posture of the movable gripper 31 connected to it through the connecting arm 33 is mechanically fixed, and the movable gripper 31 changes from a rotatable floating state to a rigid state.

[0036] Slot 311, which penetrates the middle of the bottom end of movable jaw 31; The clamping insert 312 is slidably mounted in the slot 311; The clamping cylinder 313 is fixedly installed on the outer bottom end of the movable gripper 31 and its output end is fixedly connected to one end of the clamping block 312. The clamping cylinder 313 is used to provide thrust to the clamping block 312 to achieve the clamping and fixing of the battery tray.

[0037] The spherical ball 316 is installed on the inner bottom end of the movable jaw 31. The spherical ball 316 is used to fit the battery tray to reduce the contact friction between the movable jaw 31 and the battery tray. The spherical ball 316 is embedded in the blind hole at the inner bottom end of the movable jaw 31. The ball can rotate freely, with 1 / 3 of the ball exposed. When the movable jaw 31 fits against the side of the battery tray, the spherical ball 316 converts sliding friction into rolling friction. The limiting slot 314 is located on the inner top of the movable gripper 31 and is adapted to the pressure plate 315. The limiting slot 314 and the pressure plate 315 form a rotation angle limiting mechanism for the movable gripper 31.

[0038] The positioning airbag 4 is provided in two sets and is installed in the middle of the two clamping plates 2 respectively. Both sets of positioning airbags 4 are provided in multiple sets that are evenly distributed. Two airbag supports 41 are provided and located on the outside of the two clamping plates 2 respectively. Two sets of positioning airbags 4 are fixedly installed on the inside of the two airbag supports 41 respectively. Airbag cylinders 42 are installed between the two airbag supports 41 and the two clamping plates 2. The positioning airbags 4 are used to inflate and assist in positioning the upper part of the battery tray after the clamping is completed.

[0039] The present invention also provides a positioning method for a centering and positioning fixture for a battery tray, comprising the following steps: Step 1: Fixture in place. Use hoisting equipment to move the entire fixture above the battery tray and drive the entire fixture down until the movable jaws 31 at the bottom of the two clamping plates 2 reach the two sides of the battery tray respectively. Before use, the device is connected to the lifting lug 15 through lifting equipment (crane, cabinet, etc.). During the descent of the clamp, the lower end of the movable jaw 31 stops when it reaches the height of the battery tray side beam. Step 2, pre-clamping: The centering cylinder 223 drives the two clamping plates 2 to move toward the battery tray. The clamping plates 2 drive the movable gripper 31 to move and contact the side of the battery tray. During the contact process, the movable gripper 31 flips under the action of the top spring 325, the positioning slide 32 and the connecting arm 33 and remains flexibly attached to the battery tray. During the pre-clamping process, the electromagnet 324 is energized. After the electromagnet 324 is energized, it attracts the armature 323. The armature 323 is attracted and drives the limiting rod 322 to move away from the positioning slide 32, so that the limiting rod 322 is separated from the limiting hole 321. At this time, the positioning slide 32 is in an active state. During the pre-clamping process, the centering cylinder 223 extends to drive the centering bracket 22 to slide. The centering bracket 22 presses the positioning slide rod 211 through the positioning groove 222 on the positioning plate 221, so that the two clamping plates 2 move synchronously. The two clamping plates 2 respectively drive the two sets of movable jaws 31 to move relative to each other, so that the two sets of movable jaws 31 move closer to the battery tray. During this process, if there is a centering deviation between the battery tray and the entire fixture, the lower end of the movable jaw 31 on the deviation side contacts the side beam of the battery tray. As the clamping plates 2 move, the movable jaw 31 is subjected to the battery tray. The reaction force of the side beam rotates outward around the pin at its top, at which time the angle of the movable gripper 31 changes. During this process, the top spring 325 pushes the positioning slide 32 downward. The positioning slide 32 transmits the thrust to the movable gripper 31 through the connecting arm 33, so that the movable gripper 31 always maintains a flexible fit with the side wall of the tray, ensuring that the contact does not detach and does not generate a forced thrust on the tray. After the centering cylinder 223 is fully pushed out, the clamping plate 2 and the movable gripper 31 move into place. At this time, the distance between the two clamping plates 2 is slightly greater than the span length of the battery tray. Step 3: Centering and adjustment. After the clamping plate 2 moves into position, determine whether the movable gripper 31 is in a vertical state by whether the position switch 34 is triggered. Then, determine whether the entire clamp and the battery tray are aligned based on the state of the two sets of movable grippers 31. Then, adjust the position of the connecting plate 11, clamping plate 2 and movable gripper 31 according to the alignment situation until the entire clamp coincides with the center of the battery tray. During the centering adjustment process, the movable gripper 31 on the side of the battery tray that deviates from the entire fixture is in an inclined state. The position switch 34 on this side is separated from the pressure plate 315 and is in an open state. At this time, the connecting plate 11 is driven to move by the centering motor 14, the centering screw 13 and the screw sleeve 12. The connecting plate 11 drives the clamping plate 2 and the movable gripper 31 to move, so that the entire fixture moves towards the center of the battery tray. During the movement of the fixture, the movable gripper 31 is kept in flexible contact with the side beam of the battery tray under the action of the top spring 325. When the movable gripper 31 moves to the vertical state, the position switch 34 is triggered, and the centering adjustment of the battery tray is realized. In this state, the two sets of movable grippers 31 are in contact with the side beam of the battery tray respectively. It should be noted that during the assembly and debugging of the equipment, the final position of the clamping plate 2 and the movable gripper 31 is consistent with the width of the battery tray. When the fixture and the battery tray are aligned, the two sets of movable grippers 31 are in a vertical state and in contact with the side beam of the battery tray. During the centering adjustment process, the electromagnet 324 is de-energized and releases the armature 323. At this time, the armature 323 and the limiting rod 322 are reset under the action of the spring. The limiting rod 322 is subjected to a force in the direction of the positioning slide 32. During the flipping process, the movable jaw 31 drives the positioning slide 32 to move through the connecting arm 33, so that the positioning slide 32 slides down along the outer surface of the jaw support 3. During this process, the end of the limiting rod 322 slides against the inner wall of the positioning slide 32. When the movable jaw 31 flips to the vertical state (i.e., when the clamping is centered), the limiting rod 322 coincides with the limiting hole 321. At this time, the limiting rod 322 is inserted into the limiting hole 321 under the action of the spring, and the position of the positioning slide 32 and the movable jaw 31 is locked. At this time, the movable jaw 31, the jaw support 3 and the clamping plate 2 together form a rigid clamping structure. Step 4: Final clamping. Drive the clamping cylinder 313 to push the clamping block 312 out. The clamping block 312 presses the outer side beam of the battery tray, completing the final clamping and fixing of the battery tray.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A centering and positioning fixture for a battery tray, characterized in that, include: The clamp main beam (1) has a sliding connecting plate (11) installed below it; The clamping plate (2) is provided in two sets and symmetrically installed below the connecting plate (11). Both clamping plates (2) can slide. The top of each clamping plate (2) is fixedly installed with a positioning arm (21). The two positioning arms (21) are fixedly installed with a positioning slide rod (211) at the end that is close to each other. A centering bracket (22) is installed between the two positioning arms (21). Two positioning plates (221) are fixedly installed on the outside of the centering bracket (22). The middle of each of the two positioning plates (221) is provided with a positioning slide groove (222) that is adapted to the positioning slide rod (211). A centering cylinder (223) is fixedly installed in the middle of one side of the centering bracket (22). The centering cylinder (223) is fixedly installed on the lower surface of the connecting plate (11). A gripper support (3) is provided, and all of them are fixedly installed at the bottom end of the clamping plate (2). The bottom end of the gripper support (3) is rotatably mounted with a movable gripper (31) via a pin. A position switch (34) is fixedly installed on the outer top of the movable gripper (31). A pressure plate (315) is fixedly installed at the bottom end of the gripper support (3). When the movable gripper (31) is perpendicular to the gripper support (3), the contact of the position switch (34) is squeezed by the pressure plate (315). The pressure plate (315) and the position switch (34) form a movable gripper (31) angle detection mechanism to determine the alignment status of the two sets of gripper supports (3).

2. The centering and positioning fixture for a battery tray according to claim 1, characterized in that, Also includes: The lead screw sleeve (12) is fixedly installed in the middle of the upper surface of the connecting plate (11); The centering screw (13) is rotatably mounted below the main beam (1) of the fixture via a bearing and passes through the screw sleeve (12). The centering motor (14) is fixedly installed on the outside of the main beam (1) of the clamp and its output shaft is fixedly connected to one end of the centering screw (13). The centering motor (14), the centering screw (13) and the screw sleeve (12) form the position adjustment mechanism of the connecting plate (11) to adjust the position of the connecting plate (11) and the clamping plate (2).

3. The centering and positioning fixture for a battery tray according to claim 1, characterized in that, Also includes: The positioning slide (32) is slidably mounted on the outside of the gripper support (3). The bottom end of the positioning slide (32) is rotatably mounted with a connecting arm (33) via a pin. The bottom end of the connecting arm (33) is movably connected to the middle of the outer side of the movable gripper (31) via a pin. A top spring (325) is installed between the top end of the positioning slide (32) and the top end of the outer side wall of the gripper support (3). The top spring (325), the positioning slide (32), and the connecting arm (33) form a thrust mechanism to provide a force in the direction of the battery tray to the movable gripper (31).

4. The centering and positioning fixture for a battery tray according to claim 3, characterized in that, Also includes: A limiting hole (321) is provided at the top outer side of the positioning slide (32); A limiting rod (322) passes through the middle of the gripper support (3) and is adapted to the limiting hole (321). An armature (323) is fixedly installed at one end of the limiting rod (322). The armature (323) is located inside the gripper support (3), and a spring is provided between the armature (323) and the inner wall of the gripper support (3). The spring is used to provide the armature (323) and the limiting rod (322) with the outward sliding force so that the limiting rod (322) is inserted into the limiting hole (321). When the movable gripper (31) is perpendicular to the gripper support (3), the positioning slide (32) is at the lowest point. When the positioning slide (32) is at the lowest point, the limiting rod (322) is inserted into the limiting hole (321) to lock the position of the positioning slide (32) and the movable gripper (31). An electromagnet (324) is fixedly installed inside the gripper support (3). The electromagnet (324) is used to attract the armature (323) and to separate the limiting rod (322) from the limiting hole (321) to release the limiting of the movable gripper (31).

5. A centering and positioning fixture for a battery tray according to claim 1, characterized in that, Also includes: The slot (311) passes through the middle of the bottom end of the movable jaw (31); The clamping insert (312) is slidably mounted in the slot (311); A clamping cylinder (313) is fixedly installed on the outer bottom end of the movable gripper (31) and its output end is fixedly connected to one end of the clamping plug (312). The clamping cylinder (313) is used to provide thrust to the clamping plug (312) to achieve clamping and fixing of the battery tray.

6. A centering and positioning fixture for a battery tray according to claim 1, characterized in that, Also includes: A spherical ball (316) is installed on the inner bottom end of the movable gripper (31), the spherical ball (316) is used to fit the battery tray to reduce the contact friction between the movable gripper (31) and the battery tray; The limiting slot (314) is located on the inner top of the movable gripper (31) and is adapted to the pressure plate (315). The limiting slot (314) and the pressure plate (315) together form a limiting mechanism for the rotation angle of the movable gripper (31).

7. A centering and positioning fixture for a battery tray according to claim 1, characterized in that, Also includes: The positioning airbag (4) is provided in two sets and is installed in the middle of the two clamps (2). The positioning airbags (4) in both sets are arranged in multiples with equal spacing.

8. A centering and positioning fixture for a battery tray according to claim 7, characterized in that, Also includes: The airbag support (41) has two parts, which are located on the outside of the two clamps (2). The two sets of positioning airbags (4) are fixedly installed on the inside of the two airbag supports (41). An airbag cylinder (42) is installed between the two airbag supports (41) and the two clamps (2).

9. A centering and positioning fixture for a battery tray according to claim 1, characterized in that, Also includes: The lifting lugs (15) are provided in four parts and are fixedly installed at the four corners of the upper surface of the main beam (1) of the clamp.

10. A positioning method for a centering and positioning fixture for a battery tray, applied to the centering and positioning fixture for a battery tray as described in any one of claims 1-9, characterized in that, Includes the following steps: Step 1: The clamp is in place. The entire clamp is moved above the battery tray by the hoisting equipment and the entire clamp is driven to descend until the movable jaws (31) at the bottom of the two clamping plates (2) reach the two sides of the battery tray respectively. Step 2, pre-clamping: The centering cylinder (223) drives the two clamping plates (2) to move toward the battery tray. The clamping plates (2) drive the movable claw (31) to move and contact the side of the battery tray. During the contact process, the movable claw (31) flips under the action of the top spring (325), the positioning slide (32) and the connecting arm (33) and remains in flexible contact with the battery tray. Step 3: Centering and adjustment. After the clamping plate (2) moves into position, determine whether the movable gripper (31) is in a vertical state by whether the position switch (34) is triggered. Then, determine whether the entire clamp and the battery tray are aligned based on the state of the two sets of movable grippers (31). Adjust the position of the connecting plate (11), clamping plate (2) and movable gripper (31) according to the alignment situation until the entire clamp coincides with the center of the battery tray. Step 4: Final clamping. Drive the clamping cylinder (313) to push the clamping block (312) out. The clamping block (312) presses the outer side beam of the battery tray to complete the final clamping and fixing of the battery tray.

Images