Battery pack explosion-proof valve milling clamping device

Abstract

The application relates to the field of machining clamping fixtures, and particularly discloses a clamping device for milling battery pack explosion-proof valves, which comprises two mounting seats and a mounting plate rotatably arranged between the two mounting seats, a plurality of mounting holes are formed through the mounting plate, and the turning axis of the mounting plate on the mounting seat passes through the centers of the mounting holes; a plurality of clamping claws are hinged to the hole walls of the mounting holes, the mounting plate is provided with a control mechanism for driving the plurality of clamping claws in the same mounting hole to synchronously and uniformly turn and a locking mechanism for locking the clamping claws. The application has the effects of high tool setting efficiency after workpiece column turning, stable centering and clamping, and can ensure the machining efficiency and machining quality of batch workpiece columns with different sizes.

Description

TECHNICAL FIELD

[0001] The application relates to the field of machining clamping fixtures, in particular to a clamping device for milling a battery pack explosion valve. BACKGROUND

[0002] The battery pack explosion valve is an important component in the battery pack of a new energy vehicle, which can ensure that the battery pack has good waterproof and ventilation performance, and can relieve pressure while isolating other external interference outside the pack body. When processing the explosion valve, an aluminum alloy cylinder is usually milled integrally on a CNC lathe, and the aluminum alloy cylinder needs to be flipped and milled during processing.

[0003] Generally, a clamping device adapted to the lathe of the CNC lathe is selected, which can clamp the aluminum alloy cylinder to be processed, and can also conveniently flip after one end of the aluminum alloy cylinder is processed. If necessary, multiple clamping devices can be set at one time to reduce the frequency of loading and unloading workpieces and the frequency of starting and stopping the lathe.

[0004] However, when multiple clamping devices are assembled and multiple workpieces are processed by the lathe, on the one hand, after the workpiece is flipped, the milling cutter of the lathe needs to be re-adjusted for cutting to ensure the processing accuracy. On the other hand, the aluminum alloy cylinder to be processed is usually cylindrical and has different sizes. When clamping different models of workpieces, clamping may be loose or may not be centered, which will ultimately affect the processing quality and efficiency of the lathe. SUMMARY

[0005] In order to improve the problem that the poor tool adjustment efficiency and quality after the workpiece is flipped will affect the processing quality and efficiency, the application provides a clamping device for milling a battery pack explosion valve.

[0006] The clamping device for milling a battery pack explosion valve provided by the application adopts the following technical scheme:

[0007] A clamping device for milling a battery pack explosion valve, comprising two mounting seats and a mounting plate rotatably mounted between the two mounting seats, a plurality of mounting holes are provided through the mounting plate, and the flipping axis of the mounting plate on the mounting seat passes through the centers of the mounting holes;

[0008] A plurality of clamping claws are hinged to the hole walls of the mounting holes, and the mounting plate is provided with a control mechanism for driving the plurality of clamping claws in the same mounting hole to flip synchronously and in the same direction, and a locking mechanism for locking the clamping claws.

[0009] By adopting the technical scheme, when multiple workpieces need to be turned over and milled, the multiple workpiece columns can be inserted into the multiple mounting holes respectively, and then the control mechanism is used to drive the multiple clamping claws to approach the direction of the workpiece columns and to clasp and clamp the workpiece columns, and then the locking mechanism is used to lock the clamping claws, so that the workpiece columns are stably mounted on the mounting plate, and the multiple clamping claws arranged around the mounting holes can well center and position the workpiece columns, so that the axis of the workpiece column clamped by the clamping claws is located on the center of the mounting hole, and the turning axis of the mounting plate also passes through the center of the mounting hole.

[0010] In this way, when the workpiece column is turned over after one end is processed, the axis of the workpiece column corresponds to the X-axis and Y-axis points of the milling cutter of the lathe, and only the Z-axis needs to be adjusted when the tool is reset, which greatly reduces the efficiency of tool setting after the workpiece column is turned over, thereby significantly improving the processing quality and efficiency of the lathe for the workpiece column.

[0011] Optionally, a gap is formed in the side of the mounting plate in the length direction and communicates with the mounting hole, and the width of the gap is not greater than the diameter of the mounting hole.

[0012] By adopting the technical scheme, when the workpiece column is installed on the mounting plate, if at least one end of the workpiece column is a small end, the small end of the workpiece column can be directly inserted into the mounting hole and clamped; if both ends of the workpiece column are large ends, the turning stroke of the clamping claw is not enough to compensate for the radius difference of the workpiece column, so the workpiece column cannot be directly inserted into the mounting hole and stably clamped, and the small diameter part of the workpiece column can be inserted into the mounting hole from the gap, and the clamping device of the present application can also effectively center and clamp the workpiece column with two ends of different diameters by driving the multiple clamping claws to clasp and clamp the workpiece column through the control mechanism.

[0013] Optionally, the control mechanism includes an arc-shaped rack slidingly arranged in the mounting seat and a driving assembly for driving the arc-shaped rack to slide along the circumferential track thereof, the arc-shaped rack is coaxial with the mounting hole, and the opening of the arc-shaped rack is matched with the gap, and the clamping claw is hingedly connected with a connecting rod having the other end hinged to the arc-shaped rack.

[0014] By adopting the technical scheme, after the workpiece column is inserted into the mounting hole through the opening of the arc-shaped rack and the gap of the mounting plate, the arc-shaped rack is driven to slide around its axis by the driving assembly, and the arc-shaped rack in turn pushes the corresponding multiple clamping claws towards the workpiece column through the multiple connecting rods, so that the workpiece column is centered towards the center of the mounting hole and stably clamped by the multiple clamping claws under the clamping action of the multiple clamping claws, and the coordinated control of the control structure on the multiple clamping claws is realized.

[0015] Optionally, the driving assembly comprises a driving rack engaged with the arc-shaped rack and two driving gears engaged with the arc-shaped rack, the two driving gears are arranged on two sides of a radial line of the mounting hole perpendicular to the driving rack; the driving assembly further comprises a driving member for synchronously driving the driving gears and the driving rack to synchronously rotate the arc-shaped rack.

[0016] By using the above technical scheme, the driving member can simultaneously drive the driving rack and the two driving gears to drive the arc-shaped rack when working, which can effectively improve the problem that the arc-shaped rack is deformed due to unbalanced driving force when being driven by a single driving unit, thereby promoting stable and labor-saving driving of the arc-shaped rack on the plurality of clamping claws.

[0017] Optionally, the driving member comprises a driving rod rotatably mounted on the mounting plate, the driving rack is fixedly connected with a same-motion rack, the driving rod is mounted with a same-motion gear engaged with the same-motion rack, and a transmission sleeve is arranged between the driving rod and the driving gear.

[0018] When the driving rod is rotated, the driving gear drives the arc-shaped rack to slide in the same direction and at the same angular velocity as the driving rack.

[0019] By using the above technical scheme, when the operator rotates the driving rod, the driving rod drives the same-motion gear to rotate, the same-motion gear drives the same-motion rack engaged therewith to slide in the mounting plate, and the same-motion rack drives the arc-shaped rack to slide through the driving rack when sliding; at the same time, the driving rod also drives the driving gear to drive the arc-shaped rack to slide in the same direction and at the same angular velocity through the transmission sleeve, so that the operator can realize synchronous driving control of the driving rack and the two driving gears by only operating the driving rod, which ensures that the arc-shaped rack is uniformly and stably driven, reduces the input end of the driving force, and does not need to consider the coordination of different power input sources, and the operation is more convenient.

[0020] Optionally, the locking mechanism comprises a ratchet coaxially fixed on the driving rod, and a pawl adapted to the ratchet is mounted on the mounting plate.

[0021] When the driving rod is rotated to drive the plurality of clamping claws to flip out, the pawl does not lock the ratchet.

[0022] By adopting the technical scheme, when the rotating driving rod makes the plurality of clamping claws flip out, the pawl does not lock the ratchet wheel, and when the arc-shaped rack is driven to slide, the plurality of clamping claws can be clamped more tightly on the workpiece column, and the reverse rotation of the pawl on the ratchet wheel is locked, that is, the reverse sliding of the arc-shaped rack is locked, and the convenient locking effect of the locking mechanism on the plurality of clamping claws is realized. When the workpiece column is processed, the locking of the pawl on the ratchet wheel is released, at this time, the ratchet wheel and the driving rod can be rotated arbitrarily, that is, the clamping claw is no longer clamped on the workpiece column, and the workpiece column can be freely taken off from the mounting plate.

[0023] Optionally, the mounting plate is fixedly connected with an elastic member for driving the pawl to abut against the ratchet wheel, and the pawl is fixedly connected with a lever extending out of the mounting plate.

[0024] By adopting the technical scheme, the pawl is ensured to abut against the ratchet wheel under the action of the elastic member without external force, and the locking effect of the locking mechanism on the plurality of clamping claws can be effectively ensured; when the workpiece column needs to be taken out, the locking structure can be conveniently unlocked by pulling the lever.

[0025] Optionally, the clamping claw comprises a claw base hinged to the mounting plate and two claw arms integrally formed on the claw base, a flared gap is reserved between the two claw arms, and the claw base is provided with a rubber web at the gap.

[0026] By adopting the technical scheme, the clamping claw is provided with two claw arms and a rubber web therebetween, while ensuring the clamping stability of the clamping claw on the workpiece column, the high friction coefficient characteristic of the rubber web can also be utilized to realize high slip resistance of the clamping claw after clamping the workpiece column, and the phenomenon that the workpiece column with large weight slips off the clamping claw under the influence of its own weight can be effectively improved, and the machining precision of the lathe on the workpiece column is ensured.

[0027] Optionally, the rubber web is arranged on the side of the claw arm close to the inner arc surface of the clamping claw, and the gap between the two claw arms is larger than the cross-sectional size of the rubber web.

[0028] By adopting the technical scheme, the rubber web made of rubber material deforms when being pressed, and since the combination part of the claw arm and the rubber web is reserved with a deformation space, the contact area between the deformed rubber web and the workpiece column can be further increased at the part where the rubber web is attached to the workpiece column, so that the slip resistance of the rubber web is further improved.

[0029] Optionally, the driving gear is arranged at the part of the mounting plate close to the opening.

[0030] By adopting the technical scheme, the two driving gears are distributed in the notch part of the mounting plate, can cooperate with the driving rack to exert a relatively balanced driving force and driving point on the arc-shaped rack, so that the arc-shaped rack is more likely to drive the plurality of clamping claws to clamp the workpiece column.

[0031] In summary, the present application includes at least one of the following beneficial technical effects:

[0032] 1. The mounting plate is rotated about the axis, and the center of the mounting hole is also rotated about the axis. The control mechanism drives the plurality of clamping claws to synchronously clamp the workpiece column, so that the workpiece column of different sizes clamped by the plurality of clamping claws is always coaxially arranged with the mounting hole and stably clamped, thereby greatly improving the tool setting efficiency of the lathe when the workpiece column is machined after being rotated, and the positioning of the workpiece column is more accurate, which can ensure the machining quality and efficiency of the lathe for the workpiece column.

[0033] 2. The notch is arranged on the mounting plate and communicates with the mounting hole, and the driving structure for driving the plurality of clamping claws to synchronously clamp is an arc-shaped rack, so that the clamping device of the present application can effectively center and clamp the workpiece column with the diameter expanded at both ends, and the machining capacity of the present application for special workpieces is ensured.

[0034] 3. The driving rack and the two driving gears mounted on the mounting plate near the notch are arranged to jointly drive the arc-shaped rack, so that a relatively balanced driving force and driving point can be exerted on the arc-shaped rack, and the arc-shaped rack is more likely to drive the plurality of clamping claws to clamp the workpiece column. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 is a schematic diagram of the overall structure of the embodiment of the present application.

[0036] Figure 2 is a schematic diagram of the local structure of the embodiment of the present application.

[0037] Figure 3 is Figure 2 is an enlarged schematic diagram of part A in FIG. 6.

[0038] Figure 4 is Figure 2 is an enlarged schematic diagram of part B in FIG. 6.

[0039] Reference signs: 11, mounting seat; 12, mounting plate; 121, mounting hole; 122, notch;

[0040] 21, clamping claw; 211, claw seat; 212, claw arm; 213, rubber web; 22, arc-shaped rack; 23, connecting rod;

[0041] 31, driving rack; 32, driving gear;

[0042] 41, drive rod; 42, homokinetic rack; 43, homokinetic gear;

[0043] 51, ratchet wheel; 52, pawl; 53, elastic member; 54, lever;

[0044] 61, transmission rod; 62, first bevel gear; 63, second bevel gear; 64, third bevel gear; 65, reversing gear; 66, fourth bevel gear. DETAILED DESCRIPTION

[0045] The following will be described in detail with reference to the accompanying drawings. Figures 1-4 The application is further described in detail.

[0046] The application discloses a clamping device for milling battery pack explosion-proof valve. Figure 1 And Figure 2 The clamping device for milling battery pack explosion-proof valve comprises two mounting seats 11 and a mounting plate 12 rotatably mounted between the two mounting seats 11, a plurality of mounting holes 121 are formed through the mounting plate 12, and the rotation axis of the mounting plate 12 on the mounting seat 11 passes through the centers of the plurality of mounting holes 121; specifically, the mounting seat 11 is a rotary oil cylinder or a rotary air cylinder, and the connecting line of the centers of the plurality of mounting holes 121 on the mounting plate 12 passes through the rotation axis of the rotary oil cylinder or the rotary air cylinder.

[0047] Referring to Figure 1 And Figure 2 A plurality of clamping claws 21 are hingedly connected to the hole walls of the mounting holes 121 on the mounting plate 12, the plurality of clamping claws 21 are distributed in an equidistant circumferential array along the axes of the mounting holes 121, the mounting plate 12 is provided with a control mechanism for driving the plurality of clamping claws 21 in the same mounting hole 121 to synchronously and uniformly rotate and a locking mechanism for locking the clamping claws 21. In order to enable the clamping device to center and clamp the special workpiece column bodies with expanded diameters at both ends, a plurality of notches 122 are formed in the length direction of the side edges of the mounting plate 12 and are in one-to-one correspondence with the plurality of mounting holes 121, and the width of the notches 122 is not greater than the diameter of the mounting holes 121.

[0048] In this way, when it is necessary to perform face milling processing on a plurality of workpieces to be processed, the plurality of workpiece column bodies can be respectively inserted into the plurality of mounting holes 121 or translated from the notches 122 into the mounting holes 121, and then the control mechanism is used to drive the plurality of clamping claws 21 to synchronously approach the direction of the workpiece column bodies and clasp and clamp the workpiece column bodies, and then the locking mechanism is used to lock the clamping claws 21, so that the workpiece column bodies can be well centered and fixed, and the axes of the workpiece column bodies clamped by the clamping claws 21 are located on the centers of the mounting holes 121, and the rotation axis of the mounting plate 12 also passes through the centers of the mounting holes 121.

[0049] Thus, when the workpiece column is completed at one end and is turned over, the milling machine needs to only be calibrated on the Z axis when re-indexing, greatly reducing the efficiency of re-indexing after the workpiece column is turned over, thereby significantly improving the machining quality and efficiency of the workpiece column.

[0050] In a specific arrangement, referring to Figure 2 , the control mechanism includes an arc-shaped rack 22 slidingly arranged in the mounting seat 11 and a driving assembly for driving the arc-shaped rack 22 to slide along its circumferential track, the arc-shaped rack 22 is coaxial with the mounting hole 121 and the opening of the arc-shaped rack 22 is adapted to the notch 122, and the clamping jaw 21 is hingedly connected with a connecting rod 23 having the other end hingedly connected to the arc-shaped rack 22. The driving assembly includes a driving rack 31 engaged with the arc-shaped rack 22 and two driving gears 32 engaged with the arc-shaped rack 22, the two driving gears 32 are installed on both sides of the mounting hole 121 perpendicular to the radial line of the driving rack 31, and the driving gears 32 are arranged at the part of the mounting plate 12 close to the notch 122; the driving assembly further includes a driving member for driving the driving gears 32 and the driving rack 31 to synchronously drive the arc-shaped rack 22 to rotate synchronously.

[0051] In this way, after the workpiece column is placed in the mounting hole 121, the driving member drives the driving rack 31 and the two driving gears 32 to simultaneously and synchronously drive the arc-shaped rack 22 to slide, and the arc-shaped rack 22 in turn pushes the corresponding plurality of clamping jaws 21 to approach the workpiece column, at this time the workpiece column is centered to the center of the mounting hole 121 under the clamping action of the plurality of clamping jaws 21 and is stably clamped by the plurality of clamping jaws 21, realizing the cooperative control of the control mechanism on the plurality of clamping jaws 21. Moreover, distributing the two driving gears 32 at the notch 122 of the mounting plate 12 can cooperate with the driving rack 31 to apply a more balanced driving force and driving point to the arc-shaped rack 22, so that the arc-shaped rack 22 is more likely to drive the plurality of clamping jaws 21 to clamp the workpiece column, and can also effectively improve the problem of structural deformation of the arc-shaped rack 22 caused by unbalanced driving force when the arc-shaped rack 22 is driven by a single driving unit.

[0052] More specifically, referring to Figure 2 , the driving member includes a driving rod 41 rotatably mounted on the mounting plate 12, the driving rod 41 extends to the outside of the mounting plate 12 at one end and is fixedly connected with a hand wheel, a same-motion rack 42 is fixedly connected to the driving rack 31, a same-motion gear 43 engaged with the same-motion rack 42 is mounted on the driving rod 41, and a transmission sleeve is arranged between the driving rod 41 and the driving gear 32; when the driving rod 41 is rotated, the driving gear 32 drives the arc-shaped rack 22 to slide in the same direction and at the same angular velocity as the driving rack 31.

[0053] Among them, referring to Figure 2The transmission assembly comprises a transmission rod 61 rotatably installed in the mounting plate 12, the driving rod 41 is coaxially and fixedly connected with a first bevel gear 62, one end of the transmission rod 61 is coaxially and fixedly connected with a second bevel gear 63 which is in meshing connection with the first bevel gear 62, the other end of the transmission rod 61 is coaxially and fixedly connected with a third bevel gear 64, the mounting plate 12 is rotatably installed with a reversing gear 65 which is in meshing connection with the driving gear 32, the reversing gear 65 is coaxially and fixedly connected with a fourth bevel gear 66 which is in meshing connection with the third bevel gear 64. By adjusting the tooth number of the second bevel gear 63 and the third bevel gear 64, the transmission ratio of the driving rod 41 and the driving gear 32 can be changed, and then the angle of the driving gear 32 driving the arc-shaped rack 22 to slide and the direction and angle of the driving rack 31 driving the arc-shaped rack 22 to slide are the same when the driving rod 41 rotates by a unit angle, so as to prevent the driving member from being stuck.

[0054] Therefore, when the operator rotates the driving rod 41, the driving rod 41 drives the homokinetic gear 43 to rotate on one hand, the homokinetic gear 43 drives the homokinetic rack 42 in meshing connection therewith to slide in the mounting plate 12, and the homokinetic rack 42 drives the arc-shaped rack 22 to slide through the driving rack 31 when sliding; at the same time, the driving rod 41 also drives the driving gear 32 to drive the arc-shaped rack 22 to slide in the same direction and angular velocity through the transmission assembly, so that the operator can realize the synchronous driving control of the driving rack 31 and the two driving gears 32 only by operating the driving rod 41, which reduces the input end of the driving force while ensuring that the arc-shaped rack 22 is uniformly and stably driven, and the operation is more convenient without considering the coordination of different power input sources.

[0055] In order to ensure that the clamping claws 21 can continuously hold the workpiece column after the control mechanism adjusts the clamping claws 21, referring to Figure 2 and Figure 3 The locking mechanism comprises a ratchet wheel 51 coaxially and fixedly connected on the driving rod 41, and the mounting plate 12 is installed with a ratchet pawl 52 matched with the ratchet wheel 51; when the driving rod 41 rotates to the process of driving the plurality of clamping claws 21 to flip out, the ratchet pawl 52 is not locked to the ratchet wheel 51; when specifically arranged, the mounting plate 12 is fixedly connected with an elastic member 53 for driving the ratchet pawl 52 to abut against the ratchet wheel 51, the elastic member 53 is arranged as a torsion spring installed on the hinged shaft between the ratchet pawl 52 and the mounting plate 12, the ratchet pawl 52 is fixedly connected with a lever 54 extending out of the mounting plate 12, and the mounting plate 12 is provided with a long groove for the lever 54 to pass out and swing in the direction of approaching or away from the ratchet wheel 51.

[0056] Thus, when the driving rod 41 is rotated to make the plurality of clamping claws 21 flip out, the pawl 52 does not lock the ratchet wheel 51, and when the driving rack 31 drives the arc-shaped rack 22 to slide, it can make the plurality of clamping claws 21 clamp the workpiece cylinder more tightly, and the pawl 52 locks the reverse rotation of the ratchet wheel 51, that is, locks the reverse sliding of the arc-shaped rack 22, so that the locking mechanism realizes the convenient locking effect of the plurality of clamping claws 21. When the workpiece cylinder is processed, the pawl 54 is actuated to release the locking of the pawl 52 on the ratchet wheel 51, at which time the ratchet wheel 51 and the driving rod 41 can be rotated arbitrarily, that is, the clamping claws 21 no longer clamp the workpiece cylinder, and the workpiece cylinder can be freely taken off from the mounting plate 12.

[0057] In addition, considering that the workpiece cylinder is usually a metal block with a relatively smooth surface, and the clamping claws 21 also need to be made of a metal material that is not easy to deform in order to stably clamp the workpiece cylinder, so that the solid workpiece cylinder always has a tendency to slide down when being held by the plurality of clamping claws 21. In order to improve this defect.

[0058] In another possible embodiment, referring to Figure 4 The clamping claw 21 can be further provided with a claw base 211 hinged to the mounting plate 12, two claw arms 212 integrally formed on the claw base 211, an expansion-shaped gap reserved between the two claw arms 212, a rubber web 213 installed at the gap of the claw base 211, and the rubber web 213 made of elastic rubber such as silicone rubber and fluorine rubber. The rubber web 213 is arranged close to the protruding claw arm 212 on the side of the inner arc surface of the clamping claw 21, and the gap between the two claw arms 212 is larger than the cross-sectional size of the rubber web 213.

[0059] In this way, when the clamping claw 21 holds the workpiece cylinder, the rubber web 213 made of rubber deforms when being pressed, and because the combination part of the claw arm 212 and the rubber web 213 is provided with a deformation space, the deformed rubber web 213 can further increase the contact area with the workpiece cylinder at the part that adheres to the workpiece cylinder, thereby further improving the anti-skid effect of the rubber web 213, effectively improving the phenomenon that the workpiece cylinder with a large weight slips off the clamping claw 21 under the influence of its own weight, and ensuring the machining precision of the lathe on the workpiece cylinder.

[0060] The implementation principle of the clamping device for milling and cutting of the explosion-proof valve of the battery pack is as follows: when it is necessary to perform face milling and cutting processing on a plurality of workpieces to be processed, the workpiece column is placed into the mounting hole 121, the driving member drives the driving rack 31 and the two driving gears 32 to simultaneously and synchronously drive the arc-shaped rack 22 to slide, the arc-shaped rack 22 in turn drives the corresponding plurality of clamping claws 21 to move towards the workpiece column through the plurality of connecting rods 23, at this time, the workpiece column is centered towards the center of the mounting hole 121 under the clamping action of the plurality of clamping claws 21 and is stably clamped by the plurality of clamping claws 21, and the workpiece column can be well centered and fixed, so that the axis of the workpiece column clamped by the clamping claws 21 is located on the center of the mounting hole 121, and the turning axis of the mounting plate 12 also passes through the center of the mounting hole 121.

[0061] Therefore, when the workpiece column is turned over after one end is processed, the milling and turning machine only needs to be calibrated on the Z axis when the tool is reset, which greatly reduces the efficiency of tool setting after the workpiece column is turned over, thereby significantly improving the processing quality and processing efficiency of the turning machine on the workpiece column.

[0062] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A clamping device for milling battery pack explosion relief valve, comprising two mounting seats (11) and a mounting plate (12) rotatably mounted between the two mounting seats (11), characterized in that: Multiple mounting holes (121) are formed through the mounting plate (12), and the turning axis of the mounting plate (12) on the mounting base (11) passes through the centers of the multiple mounting holes (121) simultaneously; Multiple clamping claws (21) are hingedly connected to the hole walls of the mounting holes (121) of the mounting plate (12), and the mounting plate (12) is provided with a control mechanism for driving the multiple clamping claws (21) in the same mounting hole (121) to turn synchronously and in the same direction and a locking mechanism for locking the clamping claws (21); An opening (122) in communication with the mounting hole (121) is formed in the length direction side edge of the mounting plate (12), and the width of the opening (122) is not greater than the diameter of the mounting hole (121); the control mechanism comprises an arc-shaped rack (22) slidingly arranged in the mounting base (11) and a driving assembly for driving the arc-shaped rack (22) to slide along the circumferential track thereof, the arc-shaped rack (22) is coaxial with the mounting hole (121), and the opening of the arc-shaped rack (22) is matched with the opening (122), and the clamping claw (21) is hingedly connected with a connecting rod (23) having the other end hingedly connected to the arc-shaped rack (22); The driving assembly comprises a driving rack (31) engaged with the arc-shaped rack (22) and two driving gears (32) engaged with the arc-shaped rack (22), and the two driving gears (32) are arranged on the two sides of the mounting hole (121) perpendicular to the radial line of the driving rack (31); the driving assembly further comprises a driving member for driving the driving gears (32) and the driving rack (31) to synchronously drive the arc-shaped rack (22) to rotate synchronously.

2. The clamping device for milling the explosion-proof valve of the battery pack according to claim 1, characterized in that: The driving member comprises a driving rod (41) rotatably arranged on the mounting plate (12), the driving rack (31) is fixedly connected with a same-motion rack (42), the driving rod (41) is provided with a same-motion gear (43) engaged with the same-motion rack (42), and a transmission set is arranged between the driving rod (41) and the driving gear (32); When the driving rod (41) is rotated, the driving gear (32) drives the arc-shaped rack (22) to slide in the same direction and at the same angular velocity as the driving rack (31) drives the arc-shaped rack (22) to slide.

3. The clamping device for milling the explosion-proof valve of the battery pack according to claim 2, characterized in that: The locking mechanism comprises a ratchet wheel (51) coaxially fixed to the driving rod (41), and the mounting plate (12) is provided with a pawl (52) matched with the ratchet wheel (51); When the driving rod (41) is rotated to drive the multiple clamping claws (21) to turn out, the pawl (52) does not lock the ratchet wheel (51).

4. The clamping device for milling the explosion-proof valve of the battery pack according to claim 3, characterized in that: An elastic member (53) for driving the pawl (52) to abut against the ratchet wheel (51) is fixedly connected to the mounting plate (12), and a lever (54) extending out of the mounting plate (12) is fixedly connected to the pawl (52).

5. The clamping device for milling the explosion-proof valve of the battery pack according to claim 1, characterized in that: The clamping jaw (21) comprises a jaw base (211) hinged to the mounting plate (12), two jaw arms (212) integrally formed on the jaw base (211), a flared gap between the two jaw arms (212), and a rubber web (213) mounted on the jaw base (211) at the gap.

6. The clamping device for milling the explosion vent of a battery pack according to claim 5, characterized in that: The rubber web (213) is arranged on the jaw arms (212) near the inner arc side of the clamping jaw (21), and the gap between the two jaw arms (212) has a cross-sectional dimension greater than that of the rubber web (213).

7. The clamping device for milling the explosion-proof valve of the battery pack according to claim 1, characterized in that: The driving gear (32) is arranged on the mounting plate (12) near the aperture (122).

Images