Welding seam polishing device for battery box body

Abstract

The utility model belongs to the technical field of battery box machining, and particularly relates to a battery box welding seam polishing device which comprises a polishing handle body, a polishing head is arranged at one end of the polishing handle body, a rotating disc is fixed to a transmission shaft of the polishing head, sliding grooves are formed in the circumference of the rotating disc in an array mode, centrifugal sliding blocks are arranged in the sliding grooves in a sliding mode, and the circumferential wall of the rotating disc is rotationally connected with an installation base. Polishing pieces are fixedly connected to the bottom ends of the mounting bases; a first tension spring is fixedly arranged on the side wall of the centrifugal sliding block, a conical groove is formed in the top end of the mounting base and matched with the inclined face of the bottom end of the centrifugal sliding block, a baffle is fixedly connected to the inner wall of the conical groove, and a telescopic rod is rotationally connected into the conical groove. During working, the grinding head drives the turntable to rotate, and the centrifugal slide block slides to push the mounting seat and the grinding sheet to move downwards to fit a weld joint and drive the weld joint to rotate and grind; when the grinding piece is clamped, the first tension spring pulls the centrifugal sliding block to retract so that the mounting base and the grinding piece stop rotating, and the second tension spring pulls the mounting base and the grinding piece to be separated from the weld joint.

Description

Technical Field

[0001] This utility model belongs to the field of battery box processing technology, specifically referring to a battery box weld grinding device. Background Technology

[0002] In the field of new energy battery production, the battery casing, as the core load-bearing and protective component of the battery pack, has weld quality that directly affects its sealing performance, structural strength, and overall safety. Traditional battery casing weld grinding devices have the following problems:

[0003] During the grinding process of the weld seams of the battery box, welding slag, impurities, or local protrusions often remain at the weld seams. When the grinding discs of traditional grinding equipment come into contact with such obstacles, they are prone to jamming. After jamming occurs, the equipment drive motor will continue to output power, causing the motor load to increase sharply. If the operator fails to stop the machine in time, it is very easy to cause the motor to stall and burn out. This not only damages the equipment, but may also cause the equipment to go out of control due to the impact force generated by the sudden stop of the grinding disc, increasing the risk of operation. Utility Model Content

[0004] This invention overcomes the shortcomings of the prior art and provides a battery box weld grinding device. When the grinding head drives the turntable to rotate, the centrifugal slider slides outward along the slide groove and abuts against the conical groove of the mounting base through the bottom inclined surface. This generates a downward pushing force on the mounting base, pushing the grinding disc down to fit the weld. At the same time, after the side wall of the centrifugal slider abuts against the inner wall baffle of the conical groove, it can drive the mounting base and the grinding disc to rotate synchronously, ensuring that the grinding disc works evenly around the weld. When the grinding disc is stuck due to obstacles such as weld protrusions or impurities, causing a sudden drop in rotation speed, the centrifugal force on the centrifugal slider decreases sharply. The first tension spring pulls the centrifugal slider back along the slide groove towards the center of the turntable by the return force, causing the centrifugal slider to disengage from the baffle, thereby stopping the rotation of the mounting base and the grinding disc, and avoiding excessive load on the drive motor caused by the continuous jamming of the grinding disc.

[0005] The technical solution adopted by this utility model is as follows: This solution provides a battery box weld grinding device, including a grinding handle body for the operator to hold and support. A grinding head is provided at one end of the grinding handle body to provide power output for grinding operations. A turntable is fixed on the drive shaft of the grinding head. The turntable has a circumferential array of grooves to provide a sliding guide path. A centrifugal slider is slidably arranged in the grooves. Centrifugal force is generated by the rotation of the turntable. A telescopic rod is rotatably connected to the bottom end of the turntable. A mounting base is rotatably connected to the bottom end of the telescopic rod. The mounting base is in transmission cooperation with the centrifugal slider to transmit force. A grinding disc is fixedly connected to the bottom end of the mounting base for direct contact with the battery box weld and grinding operations.

[0006] Furthermore, a first tension spring is fixedly provided on the side wall of the centrifugal slider, and the other end of the first tension spring is fixedly connected to the inner wall of the slide groove to provide a retraction and reset force for the centrifugal slider, so as to realize the rapid retraction of the centrifugal slider when stuck.

[0007] Furthermore, the top of the mounting base is provided with a tapered groove, which cooperates with the bottom inclined surface of the centrifugal slider to convert the radial sliding of the centrifugal slider into the axial downward pressing motion of the mounting base.

[0008] Furthermore, a baffle is fixedly provided on the inner wall of the conical groove, and the baffle is located on the moving path of the centrifugal slider to realize the rotational transmission of the centrifugal slider to the mounting base.

[0009] Furthermore, a second tension spring is fitted on the telescopic rod to provide a restoring force to the mounting base, so that the mounting base retracts upward when stuck, causing the grinding disc to disengage from the weld.

[0010] The beneficial effects of this utility model by adopting the above structure are as follows:

[0011] (1) When the grinding head drives the turntable to rotate, the centrifugal slider slides outward along the groove. After its bottom inclined surface abuts against the inclined surface of the conical groove at the top of the mounting base, it will generate a downward thrust on the mounting base, pushing the grinding disc down and tightly adhering to the weld surface. The adhesion force between the grinding disc and the weld is adaptively adjusted according to the rotation speed of the turntable. At the same time, when the side wall of the centrifugal slider abuts against the baffle of the inner wall of the conical groove, it will drive the mounting base and the grinding disc to rotate synchronously, ensuring that the grinding disc operates evenly around the weld.

[0012] (2) When the grinding disc gets stuck due to obstacles such as weld protrusions or impurities, its rotation speed drops sharply and drives the mounting base, centrifugal slider and turntable to drop in the same step. The centrifugal force on the centrifugal slider decreases sharply. At this time, the first tension spring fixed on the side wall of the centrifugal slider will pull the centrifugal slider to quickly retract along the slide groove towards the center of the turntable by means of the recoil force, so that the centrifugal slider and the baffle are separated from each other. The mounting base and the grinding disc then stop rotating, so as to avoid the grinding disc from being stuck and causing the drive motor to be overloaded.

[0013] (3) As the centrifugal slider disengages from the inclined surface of the conical groove, the downward thrust on the mounting base disappears. The second tension spring sleeved on the telescopic rod will use the restoring force to pull the mounting base upward and retract it, causing the grinding disc to disengage from the weld, further cutting off the load transmission of the grinding operation to the motor. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a battery box weld grinding device proposed in this utility model;

[0015] Figure 2 This is a cross-sectional structural diagram of a battery box weld grinding device proposed in this utility model;

[0016] Figure 3 for Figure 2 Enlarged view of part A in the middle;

[0017] Figure 4 This is a cross-sectional exploded view of the turntable and mounting base proposed in this utility model.

[0018] The components include: 1. Grinding handle body; 2. Grinding head; 3. Turntable; 4. Slide groove; 5. Centrifugal slider; 6. Mounting base; 7. Grinding disc; 8. First tension spring; 9. Conical groove; 10. Baffle; 11. Telescopic rod; 12. Second tension spring; 13. Grip handle; and 14. Protective shell.

[0019] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0021] Example 1: Please refer to Figures 1-4This embodiment provides a battery box weld grinding device, including a grinding handle body 1. A grip handle 13 is fixedly provided on the side wall of the grinding handle body 1. The grip handle 13 is perpendicular to the grinding handle body 1, forming a T-shaped grip structure. The operator can hold the grinding handle body 1 and the grip handle 13 with both hands respectively, which is suitable for long-term grinding operations and reduces hand fatigue. A grinding head 2 is provided at one end of the grinding handle body 1, and a protective shell 14 is fixedly provided at the other end of the grinding handle body 1. The protective shell 14 is made of metal and has a semi-enclosed structure. The coverage area extends from the end of the grinding handle body 1 to the outer edge of the grinding disc 7, preventing the generation of defects during the grinding process. Metal shavings are flying everywhere. A turntable 3 is fixed on the drive shaft of the grinding head 2. A groove 4 is arranged in a circular array on the turntable 3. A centrifugal slider 5 slides in the groove 4. A first tension spring 8 is fixed on the side wall of the centrifugal slider 5. The other end of the first tension spring 8 is fixedly connected to the inner wall of the groove 4. A telescopic rod 11 is rotatably connected to the bottom end of the turntable 3. A mounting base 6 is rotatably connected to the bottom end of the telescopic rod 11. A conical groove 9 is opened at the top end of the mounting base 6. The conical groove 9 cooperates with the bottom inclined surface of the centrifugal slider 5. A baffle 10 is fixedly installed on the inner wall of the conical groove 9. The baffle 10 is located on the movement path of the centrifugal slider 5. A second tension spring 12 is sleeved on the telescopic rod 11. A grinding disc 7 is fixedly connected to the bottom end of the mounting base 6.

[0022] In this embodiment, during the grinding operation, the drive shaft of the grinding head 2 drives the turntable 3 to rotate. As the rotation speed of the turntable 3 gradually increases, the centrifugal slider 5 slides outward along the groove 4 under the action of centrifugal force. During this process, the first tension spring 8 is stretched. When the centrifugal slider 5 slides to the point where its bottom inclined surface abuts against the inner wall inclined surface of the conical groove 9 at the top of the mounting base 6, the centrifugal slider 5, which continues to slide, will generate a downward pushing force on the inclined surface of the conical groove 9, pushing the mounting base 6 to move downward, and causing the grinding disc 7 fixed at its bottom end to move downward synchronously, helping to maintain the adhesion between the grinding disc 7 and the weld surface, ensuring a uniform grinding effect. When the centrifugal slider 5 slides to the point where its side wall abuts against the baffle 10 on the inner wall of the conical groove 9, since the centrifugal slider 5 and the turntable 3 rotate synchronously, the centrifugal slider 5 will drive the mounting base 6 to rotate through the baffle 10, thereby causing the grinding disc 7 to rotate together with the mounting base 6 to perform grinding operations on the weld surface.

[0023] During the grinding process, if the grinding disc 7 becomes stuck due to protrusions, impurities, or other obstacles at the weld, the rotation speed of the grinding disc 7 will drop sharply. This will cause the rotation speeds of the mounting base 6, the centrifugal slider 5, and the turntable 3 to drop in the same step. As the rotation speed drops sharply, the centrifugal force on the centrifugal slider 5 decreases dramatically. At this time, the retraction force of the first tension spring 8 becomes dominant, pulling the centrifugal slider 5 to quickly retract towards the center of the turntable 3 along the slide groove 4. During the retraction of the centrifugal slider 5, its sidewalls disengage from the baffle 10. After losing the driving effect of the centrifugal slider 5, the mounting base 6 and the grinding disc 7 stop rotating, preventing the grinding disc 7 from becoming stuck and causing excessive load on the drive motor. At the same time, as the centrifugal slider 5 disengages from the inclined surface of the conical groove 9, the downward thrust on the conical groove 9 disappears, and the restoring force of the second tension spring 12 begins to act, pushing the mounting base 6 upward, which in turn drives the grinding disc 7 upward, causing the grinding disc 7 to disengage from the weld surface.

[0024] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A battery box weld grinding device, comprising a grinding handle body (1), wherein a grinding head (2) is provided at one end of the grinding handle body (1), characterized in that, A turntable (3) is fixedly mounted on the drive shaft of the grinding head (2). A circumferential array of grooves (4) is provided on the turntable (3). A centrifugal slider (5) is slidably mounted in the grooves (4). A telescopic rod (11) is rotatably connected to the bottom end of the turntable (3). A mounting base (6) is rotatably connected to the bottom end of the telescopic rod (11). The mounting base (6) is in transmission cooperation with the centrifugal slider (5). A grinding disc (7) is fixedly connected to the bottom end of the mounting base (6).

2. A battery case weld polishing apparatus according to claim 1, characterized by: A first tension spring (8) is fixedly provided on the side wall of the centrifugal slider (5), and the other end of the first tension spring (8) is fixedly connected to the inner wall of the groove (4).

3. A battery case weld polishing apparatus according to claim 1, characterized by: The top of the mounting base (6) is provided with a conical groove (9), which is engaged with the bottom inclined surface of the centrifugal slider (5).

4. A battery case weld polishing apparatus according to claim 3, characterized by: A baffle (10) is fixedly provided on the inner wall of the conical groove (9), and the baffle (10) is located on the moving path of the centrifugal slider (5).

5. A battery case weld polishing apparatus according to claim 3, characterized by: A second tension spring (12) is fitted onto the telescopic rod (11).

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