Battery shell rolling groove cutter

Abstract

The application relates to a battery shell rolling groove cutter, and belongs to the technical field of battery processing equipment. The battery shell rolling groove cutter comprises a cutter holder, a rolling groove cutter and a fixing rod. The rolling groove cutter is arranged on the cutter holder, and the fixing rod is arranged through the cutter holder and the rolling groove cutter. The rolling groove cutter can rotate around the axis of the fixing rod relative to the fixing rod. The rolling groove cutter comprises a cutter seat and a cutter body. A cavity is arranged in the cutter seat. An annular step is arranged in the cavity. Bearings are arranged on the two sides of the annular step. The annular step is in abutment with the outer rings of the bearings. The fixing rod is arranged through the inner rings of the bearings. A conveying channel is arranged in the fixing rod. Output holes in communication with the conveying channel are arranged at the positions of the fixing rod corresponding to the annular step. The application has the effect of reducing the damage probability of the bearings due to abrasion.

Description

Technical Field

[0001] This application relates to the field of battery processing equipment, and in particular to battery casing grooving cutters. Background Technology

[0002] In the production process of cylindrical lithium-ion batteries, nickel-metal hydride batteries and other energy storage batteries, grooving of the battery steel shell is one of the core forming processes. As a key component that directly participates in the grooving extrusion forming, the grooving cutter's operational stability directly determines the processing quality of the grooving on the battery shell.

[0003] Currently, a grooving cutter typically includes a tool holder, a grooving cutter mounted on the tool holder, and a fixing rod. Two bearings are arranged side-by-side inside the grooving cutter. One end of the fixing rod passes through the two bearings inside the grooving cutter and exits from the tool holder, where a nut is threadedly installed. When the grooving cutter rotates against the battery casing, the outer ring of the bearing rotates relative to its inner ring around the axis of the fixing rod, thus creating grooves on the battery casing. Because the grooving cutter rotates at high speed during operation, heat is generated between the inner and outer rings of the bearing due to friction. This heat causes the lubricating oil between the inner and outer rings of the bearing to thin rapidly, eventually leading to loss of lubrication and dry friction of the bearing. Therefore, lubrication holes need to be opened on the tool holder to add lubricating oil regularly.

[0004] However, with this method, since the bearings are installed side by side in the tool holder, lubricant can only be applied from the side wall of the bearings closest to the tool holder. This can lead to uneven lubrication. Furthermore, as the bearings rotate, the centrifugal force generated during rotation may throw the lubricant out, causing dry friction on the side where the two bearings are close to each other, which can damage the bearings. Summary of the Invention

[0005] In order to reduce the probability of bearing damage due to lubrication problems, this application provides a battery casing grooving cutter.

[0006] The battery casing grooving tool provided in this application adopts the following technical solution: The device includes a tool holder, a grooving cutter, and a fixing rod. The grooving cutter is mounted on the tool holder, and the fixing rod passes through the tool holder and the grooving cutter. The grooving cutter can rotate relative to the fixing rod around its axis. The grooving cutter includes a tool holder and a tool body. The tool holder has a cavity with an annular step inside. Bearings are mounted on both sides of the annular step, and the annular step abuts against the outer ring of the bearings. The fixing rod passes through the inner ring of the bearings. A conveying channel is provided inside the fixing rod, and an output hole communicating with the conveying channel is provided at the position of the fixing rod corresponding to the annular step.

[0007] By adopting the above technical solution, a conveying channel is set inside the fixed rod, and an output hole connected to the conveying channel is set at the position corresponding to the annular step on the fixed rod. This allows lubricating oil to be conveyed through the conveying channel to the output hole, and then flow through the output hole to the bearings on both sides of the annular step, thereby lubricating one side of the two bearings. Combined with the lubrication hole on the tool holder, both sides of the bearing are lubricated, protecting the bearings and reducing the probability of bearing damage due to lubrication problems.

[0008] Optionally, the output hole is a tapered hole, with the larger diameter end of the output hole connected to the conveying channel, and the fixing rod is also equipped with a sealing component for blocking the conveying channel.

[0009] By adopting the above technical solution, the output hole is set as a tapered hole, which increases the pressure required for the lubricating oil in the connecting conveying channel to flow out from the output hole. This makes the pressure in the conveying channel constant when the lubricating oil is no longer continuously input into the conveying channel, that is, when the conveying channel is blocked by the sealing component. Under the action of external atmospheric pressure, the lubricating oil will not easily flow out of the conveying channel spontaneously, reducing the probability of the bearing experiencing spontaneous lubricating oil flow when lubrication is not required.

[0010] Optionally, a toggle plate is provided on the annular step.

[0011] By adopting the above technical solution, a toggle plate is provided on the annular step. This allows the toggle plate to move the airflow between the two bearings and accelerate its flow rate when the annular step rotates with the tool holder. This creates a low pressure outside the output hole on the fixed rod, allowing the lubricating oil in the output hole to flow out, thus acting as a switch.

[0012] Optionally, the tool holder is provided with a gas-liquid passage hole corresponding to the bearing position, and a first guide part and a second guide part are respectively provided on both sides of the actuating plate. The first guide part and the second guide part are both connected to the inner wall of the annular step. The first guide part and the second guide part are respectively used to blow the airflow towards the two bearings.

[0013] By adopting the above technical solution, a first guide section and a second guide section are provided on both sides of the toggle plate to blow airflow toward the two bearings. This not only allows the airflow to blow toward the two bearings to assist in heat dissipation when the annular step rotates, but also allows the lubricating oil discharged from the output hole to be blown toward the opposite side of the two bearings as soon as possible, thereby improving lubrication efficiency.

[0014] Optionally, floating shims are provided on both sides of the tool holder, and the floating shims are set on the tool holder to abut against the inner ring of the bearing.

[0015] By adopting the above technical solution, floating pads are set on both sides of the tool holder, which prevents the tool holder from easily moving along the axis of the fixed rod when rotating, thus reducing the probability of the grooving quality deteriorating.

[0016] Optionally, the thickness of the suspension pad is 0.4mm-0.6mm.

[0017] By adopting the above technical solution and setting the thickness of the suspension pad between 0.4mm and 0.6mm, the tool holder will not easily come into contact with the side wall of the tool holder when rotating, which would cause excessive friction between the tool holder and the tool holder and result in the tool holder getting stuck during rotation.

[0018] Optionally, the tool holder includes a connecting seat and two parallel mounting plates on the mounting plate. The tool holder is positioned between the two mounting plates, and a fixing rod passes through the tool holder and the two mounting plates. The gas-liquid passage is provided on the mounting plate, and the suspension pad is positioned on one side of the two mounting plates respectively.

[0019] By adopting the above technical solution, the axial movement of the tool holder on the fixed rod is limited by the use of mounting plates and suspension shims, ensuring that the tool body will not deviate during grooving and improving the grooving quality.

[0020] Optionally, the connector is provided with mounting holes, and a fixing seat is provided on the side of the connector away from the mounting plate in a detachable manner, and a positioning part is provided on the fixing seat.

[0021] By adopting the above technical solution, the connector is provided with mounting holes, which allows the connector to be installed by bolt fixing. It is provided with a detachable fixing seat, and the fixing seat is provided with a positioning part. When the connector cannot be bolted through the mounting holes, the connector can be fixed by the positioning part on the fixing seat for subsequent grooving operations.

[0022] Optionally, the mounting base is also provided with a positioning groove.

[0023] By adopting the above technical solution, when the positioning part cannot meet the fixing of the fixed seat, the fixed seat can be fixed by the positioning groove, thereby improving the applicability of the fixed seat.

[0024] Optionally, a limiting part is provided at one end of the fixing rod, and a nut is installed at the other end of the fixing rod after passing through the tool holder and the two mounting plates by means of thread engagement. The conveying channel passes through the limiting part and extends to the position corresponding to the fixed rod and the annular step.

[0025] By adopting the above technical solution, the transmission channel passes through the limiting part and extends to the position corresponding to the fixed rod and the annular step. This ensures that when the nut needs to be tightened on the fixed rod later, the end of the fixed rod will not easily deform due to the internal transmission channel, thus improving the service life of the fixed rod.

[0026] In summary, this application includes at least the following beneficial technical effects: 1. By setting an annular step in the cavity of the tool holder, with bearings mounted on both sides of the annular step, the outer rings of the two bearings can be mounted on the annular step. Then, by supplying lubricating oil into the conveying channel, the lubricating oil can be discharged through the output hole connected to the conveying channel, thereby lubricating the side walls of the two bearings that are close to each other. In conjunction with the lubrication hole on the tool holder, the two side walls of the bearings can be lubricated separately, thus protecting the bearings and reducing the probability of bearing damage due to lubrication problems.

[0027] 2. By providing a first guide section and a second guide section on both sides of the actuating plate to blow airflow toward the two bearings, not only can the airflow be blown toward the two bearings to assist in heat dissipation when the annular step rotates, but it can also quickly blow the lubricating oil discharged from the output hole toward the opposite side of the two bearings, thereby increasing the flow rate of the lubricating oil and achieving the effect of improving lubrication efficiency. Attached Figure Description

[0028] Figure 1 This is a three-dimensional schematic diagram of a battery casing grooving tool according to an embodiment of this application; Figure 2 yes Figure 1 A three-dimensional diagram from another perspective; Figure 3 yes Figure 1 A three-dimensional schematic diagram of the grooving cutter mounted on a fixed rod; Figure 4 yes Figure 3 The left view; Figure 5 yes Figure 4 A schematic diagram of the cross-section after cutting along point AA; Figure 6 yes Figure 5 Enlarged diagram of point B in the middle.

[0029] Explanation of reference numerals in the attached drawings: 1. Tool holder; 2. Grooving cutter; 3. Fixing rod; 4. Tool base; 5. Tool body; 6. Cavity; 7. Annular step; 8. Bearing; 9. Conveying channel; 10. Output hole; 11. Sealing component; 12. Actuating plate; 13. Gas-liquid passage; 14. First guide section; 15. Second guide section; 16. Suspension pad; 17. Connecting seat; 18. Mounting plate; 19. Fixing seat; 20. Positioning part; 21. Positioning groove; 22. Limiting part; 23. Nut; 24. Mounting hole. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0031] Example This application discloses a battery casing grooving tool, referring to... Figure 1 and Figure 2 It includes a tool holder 1, a grooving cutter 2 mounted on the tool holder 1, and a fixing rod 3 passing through the tool holder 4 and the grooving cutter 2.

[0032] The tool holder 1 includes a connecting seat 17 and two parallel mounting plates 18 disposed on the upper surface of the connecting seat 17. The connecting seat 17 is provided with mounting holes 24 for bolts to pass through, which allows the connecting seat 17 to be mounted on the movable end of a drive component such as a cylinder or electric cylinder that can push it toward the battery casing by bolt engagement. On the lower surface of the connecting seat 17, there is a fixing seat 19 that is installed on the connecting seat 17 by plug-in engagement. The plug-in engagement between the fixing seat 19 and the connecting seat 17 is a transition fit, which allows the fixing seat 19 to be easily removed from the connecting seat 17. This allows the fixing seat 19 to be installed when the connecting seat 17 cannot be fixed, thereby enabling the grooving tool 2 to be used normally.

[0033] It is worth mentioning that since the grooving cutter 2 rotates after the battery casing rotates around its own axis after it comes into contact with the battery casing, the insertion and engagement between the fixed seat 19 and the connecting seat 17 will not easily fail when the fixed seat 19 is used to fix the drive component.

[0034] Furthermore, positioning parts 20 are provided at both ends of the fixing base 19. The positioning parts 20 are elongated protrusions, which allows the fixing base 19 to be detachably connected while ensuring the connection effect by inserting along the length direction of the positioning parts 20.

[0035] Furthermore, positioning grooves 21 are provided on the two parallel side walls of the fixed base 19. This allows the fixed base 19 to be connected through the positioning grooves 21 when the positioning part 20 cannot be installed and fixed. This improves the applicability of the fixed base 19 and allows the grooving cutter 2 to be adapted to different accessories on the moving end of the drive component.

[0036] Reference Figures 2-6 The grooving cutter 2 includes a cutter body 5 and a cutter holder 4. The cutter body 5 is fixedly mounted on the outer wall of the cutter holder 4 for grooving the cylindrical battery casing. Inside the cutter holder 4, there is a cylindrical cavity 6. Inside the cylindrical cavity 6, there is an annular step 7. Two bearings 8 are respectively mounted on both sides of the annular step 7. The bearings 8 are ball bearings. The outer ring of the bearings 8 abuts against the annular step 7. When the cutter holder 4 is placed between two mounting plates 18, the fixing rod 3 is inserted through the two mounting plates 18 and the two bearings 8 to fix the cutter holder 4 between the mounting plates 18. At this time, when the cutter holder 4 is rotated, the outer ring of the bearing 8 rotates relative to the inner ring of the bearing 8.

[0037] One end of the fixed rod 3 along its length is provided with a limiting part 22, while the other end of the fixed rod 3 along its length is provided with threads and a nut 23 is installed. When installing the tool holder 4, first pass the threaded end of the fixed rod 3 through the mounting plate 18, the two bearings 8 and another mounting plate 18 in sequence until the limiting part 22 abuts against the mounting plate 18. Then install the nut 23 on the threaded end of the fixed rod 3 and tighten it.

[0038] On the opposite sides of the two mounting plates 18, there are also suspension shims 16 respectively. The thickness of the suspension shims 16 is between 0.4mm and 0.6mm, and more preferably 0.5mm. The fixing rod 3 is also inserted through the suspension shims 16. One side of the suspension shims 16 abuts against the mounting plate 18, and the other side of the suspension shims 16 abuts against the inner ring of the bearing 8 in the tool holder 4. This makes it so that the suspension shims 16 will not affect the rotation of the outer ring of the bearing 8. At the same time, since the suspension shims 16 are set on both sides of the tool holder 4, the abutment of the suspension shims 16 against the tool holder 4 makes it difficult for the tool body 5 to easily drive the tool holder 4 to move along the axis of the fixing rod 3 when rotating. This makes it difficult for the tool holder 4 to easily abut against the surface of the mounting plate 18 during rotation, reducing the probability of the tool holder 4 getting stuck due to its end face abutting against the surface of the mounting plate 18 during rotation.

[0039] It is worth mentioning that the suspension gasket 16 is made of polytetrachloroethylene, which gives the suspension gasket 16 sufficient strength so that the suspension gasket 16 will not easily break due to the compression between the mounting plate 18 and the bearing 8 during the tightening process of the nut 23.

[0040] In other embodiments, the suspension pad 16 may also be made of perfluoroethylene propylene.

[0041] It is worth mentioning that a gas-liquid passage hole 13 is provided on the mounting plate 18 at the position between the outer and inner rings of the bearing 8. A conveying channel 9 is coaxially provided inside the fixing rod 3. The conveying channel 9 extends from the limiting part 22 to the position of the annular step 7 on the fixing rod 3. An output hole 10 communicating with the conveying channel 9 is also provided on the fixing rod 3. This allows the operator to inject lubricating oil into the conveying channel 9 so that the lubricating oil eventually flows out from the output hole 10, thereby delivering the lubricating oil to the opposite side of the two bearings 8. At the same time, the side of the bearing 8 closest to the mounting plate 18 can be lubricated through the gas-liquid passage hole 13, thereby achieving double-sided lubrication of the bearing 8. This reduces the probability of the bearing 8 dry friction due to insufficient lubricating oil and also reduces the wear of the bearing 8, thus improving the service life of the bearing 8.

[0042] Furthermore, the output hole 10 on the fixed rod 3 is a tapered hole, and the larger diameter end of the tapered hole is connected to the conveying channel 9. A sealing member 11 is provided at the port of the conveying channel 9 located at the limiting part 22. This allows the port of the conveying channel 9 to be sealed by the sealing member 11 when the conveying channel 9 is filled with lubricating oil. At this time, due to the viscosity of the lubricating oil itself and the air pressure outside the output hole 10, the lubricating oil will not spontaneously emerge from the output hole 10.

[0043] On the inner wall of the annular step 7, there is a toggle plate 12. As the tool holder 4 rotates, the toggle plate 12 rotates with the annular step 7. Under the action of the toggle plate 12, the airflow speed inside the cavity formed between the annular step 7, the bearing 8 and the fixed rod 3 increases and the air pressure decreases. At this time, lubricating oil can emerge from the output hole 10 to lubricate the bearing 8. This means that the lubricating oil in the conveying channel 9 will only be discharged to lubricate the bearing 8 when the tool body 5 is rotating. In this process, the rotation action of the tool body 5 is equivalent to the discharge switch of the lubricating oil in the conveying channel 9.

[0044] At the same time, as the bearing 8 rotates, the outer and inner rings will generate heat. As the lubricant enters between the outer and inner rings of the bearing 8, the lubricant can play a role in lubrication and also in heat dissipation.

[0045] Furthermore, a first guide section 14 is provided on one side of the actuating plate 12, and a second guide section 15 is provided on the other side along the length of the actuating plate 12. The distance between the first guide section 14 and the second guide section 15 gradually increases from the direction closer to the actuating plate 12 to the direction farther away from the actuating plate 12. The extending directions of the first guide section 14 and the second guide section 15 are opposite to the rotation direction of the annular step 7 (that is, when the annular step 7 rotates, the airflow contacted by the actuating plate 12 will flow through the first guide section 14 and the second guide section 15). This allows the airflow to pass through the first guide section 14 and the second guide section 15 when the annular step 7 rotates with the tool holder 4, in addition to the actuating plate 12... The moving plate 12 drives the airflow belt, and the first guide section 14 and the second guide section 15 can also blow the airflow toward the bearings 8 on both sides of the annular step 7 to assist in heat dissipation of the bearings 8. During this process, part of the airflow is discharged through the gas-liquid passage 13 on the mounting plate 18, while the rest of the airflow is discharged through the gap between the mounting plate 18 and the tool holder 4. This not only draws out the lubricating oil in the conveying channel 9, but also, under the action of the first guide section 14 and the second guide section 15, the drawn-out lubricating oil is blown toward the bearings 8 on both sides of the annular step 7, which increases the speed at which the lubricating oil reaches the bearings 8.

[0046] It is worth mentioning that since the bearing 8 generates a certain amount of heat during the high-speed rotation of the cutter body 5, grease can be filled in the conveying channel 9. After the bearing 8 heats up, the grease in the conveying channel 9 absorbs heat and turns into lubricating oil as the heat is transferred. Then, under the action of the actuating plate 12, it is discharged from the output hole 10 and, under the action of the first guide part 14 and the second guide part 15, it moves closer to the bearing 8 on both sides of the annular step 7 to lubricate it.

[0047] It should be noted that the toggle plate 12, the first guide section 14 and the second guide section 15 are all fixedly mounted on the annular step 7 by welding.

[0048] The implementation principle of this application embodiment is as follows: First, two suspension pads 16 are respectively set on the side walls of two bearings 8. Then, the blade body 5 is placed between two mounting plates 18. After the fixing rod 3 passes through the two mounting plates 18, the fixing rod 3 is also simultaneously passed through the two bearings 8 and the two suspension pads 16. Then, the installation is completed by locking it on the two mounting plates 18 with nuts 23.

[0049] When the bearing 8 needs to be lubricated after long-term use, lubricating oil is applied to the side of the bearing 8 near the mounting plate 18 through the air-liquid passage 13 on the two mounting plates 18. At the same time, the sealing part 11 is removed and lubricating oil is injected into the conveying channel 9. Then the grooving operation can be performed again. During the rotation of the cutter body 5, the actuating plate 12 rotates together with the annular step 7, thereby drawing out the lubricating oil in the conveying channel 9. Under the action of the first guide part 14 and the second guide part 15, the lubricating oil moves towards the two bearings 8 under the push of the airflow, thereby lubricating the opposite sides of the two bearings 8.

[0050] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A battery casing grooving cutter, comprising a cutter holder (1), a grooving cutter (2), and a fixing rod (3), wherein the grooving cutter (2) is disposed on the cutter holder (1), and the fixing rod (3) passes through the cutter holder (1) and the grooving cutter (2), and the grooving cutter (2) is rotatable relative to the fixing rod (3) around the axis of the fixing rod (3), characterized in that: The grooving cutter (2) includes a cutter holder (4) and a cutter body (5). A cavity (6) is provided in the cutter holder (4). An annular step (7) is provided in the cavity (6). Bearings (8) are provided on both sides of the annular step (7). The annular step (7) abuts against the outer ring of the bearing (8). A fixing rod (3) passes through the inner ring of the bearing (8). A conveying channel (9) is provided in the fixing rod (3). An output hole (10) communicating with the conveying channel (9) is provided at the position of the fixing rod (3) corresponding to the position of the annular step (7).

2. The battery casing grooving cutter according to claim 1, characterized in that: The output hole (10) is a tapered hole. The larger diameter end of the output hole (10) is connected to the conveying channel (9). The fixing rod (3) is also provided with a sealing member (11) for sealing the conveying channel (9).

3. The battery casing grooving cutter according to claim 2, characterized in that: A toggle plate (12) is provided on the annular step (7), and a gas-liquid passage hole (13) corresponding to the position of the bearing (8) is provided on the knife holder (4).

4. A battery casing grooving cutter according to claim 3, characterized in that: The actuating plate (12) is provided with a first guide section (14) and a second guide section (15) on both sides. The first guide section (14) and the second guide section (15) are both connected to the inner wall of the annular step (7). The first guide section (14) and the second guide section (15) are respectively used to blow the airflow toward the two bearings (8).

5. A battery casing grooving cutter according to claim 3, characterized in that: Suspension pads (16) are provided on both sides of the tool holder (4), and the suspension pads (16) are used to abut against the inner ring of the bearing (8).

6. A battery casing grooving cutter according to claim 5, characterized in that: The thickness of the suspension pad (16) is 0.4mm-0.6mm.

7. A battery casing grooving cutter according to claim 6, characterized in that: The tool holder (4) includes a connecting seat (17) and two parallel mounting plates (18) disposed on the connecting seat (17). The tool holder (4) is disposed between the two mounting plates (18). The fixing rod (3) passes through the tool holder (4) and the two mounting plates (18). The gas-liquid through hole (13) is disposed on the mounting plate (18). The suspension pad (16) is disposed on the corresponding side of the two mounting plates (18).

8. A battery casing grooving cutter according to claim 7, characterized in that: The connecting seat (17) is provided with a mounting hole (24), and a fixing seat (19) is provided on the side of the connecting seat (17) away from the mounting plate (18) in a detachable manner. The fixing seat (19) is provided with a positioning part (20).

9. A battery casing grooving cutter according to claim 8, characterized in that: The fixing seat (19) is also provided with a positioning groove (21).

10. A battery casing grooving cutter according to claim 7, characterized in that: One end of the fixing rod (3) is provided with a limiting part (22), and the other end of the fixing rod (3) is fitted with a nut (23) by means of threaded engagement after passing through the knife holder (4) and the two mounting plates (18). The conveying channel (9) passes through the limiting part (22) and extends to the position corresponding to the fixing rod (3) and the annular step (7).

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