Micro roller machine for rolling battery pole pieces

Abstract

The present invention relates to a micro-rolling machine for rolling battery pole pieces, comprising: a frame; a roller assembly, comprising a fixed roller and a movable roller; each gap adjustment device comprises: a wedge block adjustment mechanism, comprising an upper wedge block and a lower wedge block arranged in sequence in the up and down directions; an elastic displacement reduction mechanism, arranged between the upper wedge block and the movable roller, the elastic displacement reduction mechanism having a power input end that can be driven by an external force to generate displacement in the up and down directions and a power output end with the same displacement direction as the power input end, the elastic displacement reduction mechanism can reduce the displacement generated by its power input end in the up and down directions by a set ratio and then output it through the power output end and act on the movable roller. After the movable roller is adjusted to a position close to the set height by the wedge block adjustment mechanism, the movable roller can be fine-tuned again by the elastic displacement reduction mechanism, and the height adjustment method combining the rough adjustment process with the fine adjustment process makes the gap adjustment between the movable roller and the fixed roller faster and more convenient.

Description

Technical Field

[0001] The invention relates to the technical field of battery pole piece rolling processing, and in particular to a micro rolling machine for rolling battery pole pieces. Background Art

[0002] With the demand for high energy density chemical power sources in various electrical products, the specific capacity requirements for lithium-ion secondary batteries are increasing. Since lithium metal is light in weight and has a large theoretical specific capacity, it is an ideal negative electrode material for lithium batteries and is often processed into lithium foil. At present, lithium foil rolling is usually processed by a roller mill. The roller mainly consists of three parts: the roller body, the roller neck and the shaft head. The roller body is the middle part of the roller that actually participates in rolling the metal. The roller neck is installed in the bearing and transmits the rolling force to the frame through the bearing seat and the pressing device. The transmission end shaft head is connected to the gear seat through the connecting shaft, and the rotational torque of the motor is transmitted to the roller mechanism. In order to meet the different requirements for the thickness of lithium foil, the gap between the upper and lower rollers needs to be adjusted during production.

[0003] At present, the gap between the upper and lower rollers is mainly adjusted by a single wedge sliding structure or a nut screw transmission structure. The adjustment by the wedge sliding fit can only be rough adjustment, and the method of directly threading the adjustment screw on the lower roller support and the upper roller support and adjusting the gap by rotating the screw cannot achieve fine twisting. Therefore, the gap adjustment accuracy of the above-mentioned single wedge sliding fit adjustment structure or nut screw fit adjustment structure is limited, and it is impossible to achieve micron-level adjustment control, and it cannot meet the requirements of ultra-thin lithium foil preparation. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a micro rolling machine for rolling battery pole pieces, which has high precision in adjusting the gap between rollers and is easy to control, in view of the current status of the prior art.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: a micro rolling machine for rolling battery pole pieces, comprising:

[0006] frame;

[0007] The roller assembly comprises a fixed roller and a movable roller which are arranged opposite to each other in the up-down direction, wherein the movable roller is located below the fixed roller, and the movable roller is slidably arranged on the frame in a manner that it can move up and down relative to the fixed roller and its position is adjustable;

[0008] It also includes two gap adjustment devices arranged opposite to each other in the left-right direction and corresponding to the left and right ends of the movable roller, each gap adjustment device including:

[0009] A wedge block adjustment mechanism is arranged on the frame and supported under the movable roller, and includes an upper wedge block and a lower wedge block arranged in sequence in the up-down direction, wherein the lower wedge block can be driven by the driving mechanism to slide forward and backward, and the lower wedge block and the upper wedge block are slidably matched through the guide inclined surface to convert the movement of the lower wedge block in the front-back direction into the movement of the upper wedge block in the up-down direction;

[0010] An elastic displacement reducing mechanism is arranged between the upper wedge block and the movable roller. The elastic displacement reducing mechanism has a power input end that can be driven by an external force to generate displacement in the up and down directions, and a power output end with the same displacement direction as the power input end. The elastic displacement reducing mechanism can reduce the displacement generated by its power input end in the up and down directions by a set ratio, and then output it through the power output end and act on the movable roller.

[0011] In order to simplify the structure of the gap adjustment device and make the whole machine structure more compact, the lower wedge block is slidably arranged on the frame, and has a first guiding slope on the top. The upper wedge block is located above the lower wedge block and can be slidably arranged on the frame, and the bottom of the upper wedge block has a second guiding slope for slidingly cooperating with the first guiding slope of the lower wedge block. The first guiding slope and the second guiding slope of the lower wedge block are configured to only be driven by external force to cause the upper and lower wedge blocks to produce relative displacement, and keep the two in a relatively static state after the external force is removed.

[0012] The wedge block adjustment mechanism also includes a driving slider, which is driven by the driving mechanism and can be slid forward and backward on the top of the upper wedge block. The bottom of the driving slider has a driving rod extending downward and used to drive the lower wedge block to move forward and backward within an optional set stroke. The top of the driving slider has a third guide slope that is basically consistent with the inclination direction of the first guide slope of the lower wedge block. The third guide slope acts on the power input end of the elastic displacement reduction mechanism to move the power input end of the elastic displacement reduction mechanism upward or downward during the forward and backward movement of the driving slider.

[0013] The above structural design enables the coarse adjustment process of the wedge adjustment mechanism and the fine adjustment process of the elastic displacement reduction mechanism to be driven by the same driving mechanism, thereby reducing the number of driving mechanisms, further simplifying the overall structure of the gap adjustment device, making the whole device more compact and reducing the production cost. In particular, the coarse adjustment process of the wedge adjustment mechanism and the fine adjustment process of the elastic displacement reduction mechanism can be achieved only by driving the slider to move forward and backward in sequence, which is very convenient and easy to operate.

[0014] In order to avoid interference between the forward and backward movement of the driving rod of the driving slider and the upper and lower wedge blocks, the upper wedge block has a first clearance hole that runs through the upper and lower parts, and the lower wedge block has a second clearance hole at least at the top position corresponding to the first clearance hole. The driving rod of the driving slider passes through the first clearance hole and extends into the second clearance hole. The size of the second clearance hole in the front-to-back direction is smaller than the size of the first clearance hole in the front-to-back direction. The second clearance hole is also constructed to have a space allowing the driving rod to move in the front-to-back direction, so that the driving rod can move forward or backward relative to the lower wedge block.

[0015] The driving mechanism can adopt various existing linear driving mechanisms in which the driving motor cooperates with the lead screw slider, and the driving motor cooperates with the gear rack. In order to further improve the accuracy of the forward and backward movement adjustment of the driving slider, the driving mechanism is a linear driving mechanism, and the power output end of the linear driving mechanism is connected to the driving slider.

[0016] In order to ensure the stability of the driving slider in the front-to-back direction, the top surface of the upper wedge block is a horizontal plane, on which a limiting slide groove extending along the front-to-back direction is opened, and the driving slider is slidably constrained in the limiting slide groove.

[0017] In order to realize the sliding connection between the movable roller and the frame, the two ends of the movable roller are respectively rotatably connected to two oppositely arranged first bearing seats, and the two first bearing seats are both slidably arranged on the frame up and down, and the power output end of the elastic displacement reduction mechanism acts on the corresponding first bearing seat.

[0018] Generally speaking, the elastic displacement reduction mechanism can adopt various planar flexible hinge structures in the prior art that can achieve displacement reduction, such as a lever-type flexible hinge mechanism (using the lever principle to achieve motion scaling) or a bridge-type flexible hinge mechanism. Preferably, the elastic displacement reduction mechanism is a bridge-type flexible hinge mechanism.

[0019] As a preferred bridge-type flexible hinge mechanism, the bridge-type flexible hinge mechanism includes a first bridge arm, a second bridge arm, a third bridge arm, a fourth bridge arm, a fifth bridge arm, a sixth bridge arm, a seventh bridge arm and an eighth bridge arm located on the same vertical plane in the front-back direction;

[0020] The first bridge arm, the second bridge arm, the third bridge arm, the fourth bridge arm and the fifth bridge arm are connected in series end to end through flexible hinges to form an overall inverted U-shaped bridge arm support assembly, both ends of the bridge arm support assembly are rotatably connected to the upper wedge block through flexible hinges, the third bridge arm extends horizontally and constitutes the power output end of the elastic displacement reduction mechanism, the first bridge arm and the second bridge arm both extend vertically and are located at the rear side of the third bridge arm, the fourth bridge arm and the fifth bridge arm both extend vertically and are located at the front side of the third bridge arm,

[0021] The sixth bridge arm and the seventh bridge arm are located inside the inverted U-shaped bridge arm support assembly, and are both extended in the front-to-back direction, and the two are also rotatably connected by a flexible hinge, the rear end of the sixth bridge arm is rotatably connected to the flexible hinge correspondingly arranged between the first bridge arm and the second bridge arm, and the front end of the seventh bridge arm is rotatably connected to the flexible hinge correspondingly arranged between the fourth bridge arm and the fifth bridge arm;

[0022] The eighth bridge arm extends vertically, and its upper end is rotationally connected to the flexible hinge correspondingly arranged between the sixth bridge arm and the seventh bridge arm, and its lower end is against the third guide slope of the driving slider, thereby forming the power input end of the elastic displacement reduction mechanism.

[0023] The above-mentioned bridge-type flexible hinge mechanism design adopts a compact and symmetrical structure, and its input and output have a good linear relationship and can achieve a large displacement scaling ratio.

[0024] In order to limit the deflection of the eighth bridge arm of the bridge-type flexible hinge mechanism during the gap adjustment process, the third guide slope of the driving slider is inclined upward from front to back, and the top of the upper wedge block is also provided with a guide bracket extending upward to limit the front side of the eighth bridge arm.

[0025] In order to prevent the guide bracket from interfering with the forward and backward movement of the driving slider, the guide bracket has a clearance groove which penetrates front and back and allows the driving slider to pass therethrough.

[0026] Compared with the prior art, the present invention has the following advantages: the wedge adjustment mechanism and the elastic displacement reduction mechanism can respectively perform rough adjustment and fine adjustment on the up and down movement of the movable roller (i.e., the gap between the movable roller and the fixed roller), wherein, after the movable roller is adjusted to a position close to the set height by the wedge adjustment mechanism, the movable roller can be fine-adjusted again by the elastic displacement reduction mechanism, and this height adjustment method combining the rough adjustment process with the fine adjustment process makes the gap adjustment between the movable roller and the fixed roller faster and more convenient. In particular, in the preferred embodiment, the rough adjustment process of the wedge adjustment mechanism and the fine adjustment process of the elastic displacement reduction mechanism are realized by the same driving mechanism, which reduces the number of driving mechanisms, reduces the production cost, further simplifies the overall structure of the gap adjustment device, and makes the micro roller machine more compact. Among them, the rough adjustment process of the wedge adjustment mechanism and the fine adjustment process of the elastic displacement reduction mechanism can be realized only by the driving mechanism driving the driving slider to move forward and backward in sequence, and the gap adjustment process is very convenient and easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the three-dimensional structure of an embodiment of the present invention;

[0028] Figure 2 It is a left side view of an embodiment of the present invention;

[0029] Figure 3 It is a front view of an embodiment of the present invention;

[0030] Figure 4 for Figure 3 Sectional view at AA in the middle;

[0031] Figure 5 A schematic diagram of the three-dimensional structure of a gap adjustment device according to an embodiment of the present invention;

[0032] Figure 6 for Figure 5 Exploded diagram of

[0033] Figure 7 Schematic diagram of the structure of a bridge-type flexible hinge mechanism according to an embodiment of the present invention. DETAILED DESCRIPTION

[0034] The present invention is further described in detail below with reference to the accompanying drawings.

[0035] In the specification and claims of the present invention, terms indicating directions, such as "front", "rear", "up", "down", "left", "right", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present invention, but these terms are used here only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions are only used as explanations and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0036] See also Figure 1-Figure 7 A micro rolling mill for rolling battery pole pieces includes a frame 10, a rolling mill assembly and a gap adjustment device.

[0037] See also Figure 1 and Figure 2 The frame 10 includes two side frames 100 that are arranged opposite to each other on the left and right sides, and both side frames 100 are frame structures placed vertically. The middle parts of the two side frames 100 define an installation space for placing the first bearing seat 131 and the second bearing seat 132. Specifically, the first bearing seat 131 is located below the second bearing seat 132, and the first bearing seat 131 can be slid up and down on the front and rear side walls of the installation space of the side frame 100 through the limiting cooperation of the slider slot. Of course, the second bearing seat 132 can also be slid up and down on the side frame 100 like the first bearing seat 131, but, in general, after the second bearing seat 132 is installed in place, it is fixed relative to the side frame 100.

[0038] Continue to see Figure 1 , the roller assembly comprises a fixed roller 11 and a movable roller 12 which are arranged opposite to each other in the up-down direction. The movable roller 12 is located below the fixed roller 11. Specifically, the left and right ends of the fixed roller 11 are rotated on the second bearing seats 132 arranged on the two side frames 100 through the second bearings 142, and the left and right ends of the movable roller 12 are rotated on the first bearing seats 131 arranged on the two side frames 100 through the first bearings 141. More specifically, the ends of the fixed roller 11 and the movable roller 12 also have transmission shafts 110 and 120 extending laterally out of the side frames 100, which are used to connect with an external power mechanism, so as to realize rotation around their own axes. There is a rolling gap 15 between the movable roller 12 and the fixed roller 11 for the material to be rolled (such as lithium metal material) to pass through. When the material to be rolled passes through the rolling gap 15, the fixed roller 11 and the movable roller 12 work together to roll and press it into a metal foil of a set thickness. When the first bearing seats 131 on the two side frames 100 are moved up and down for adjustment, the rolling gap 15 between the movable roller 12 and the fixed roller 11 can be changed.

[0039] The first bearing 141 mentioned above is a self-aligning bearing, which can play a role of self-alignment when the displacement of the first bearing seat 131 has a certain difference.

[0040] There are two sets of gap adjustment devices, which are respectively arranged on the two side frames 100. Specifically, the gap adjustment device is also arranged in the installation space in the middle of the side frame 100, specifically, it is located below the first bearing seat 131 to support the first bearing seat 131.

[0041] See also Figure 4 and Figure 7 Each gap adjustment device includes a wedge adjustment mechanism 20 and an elastic displacement reduction mechanism 30. In this embodiment, the wedge adjustment mechanism 20 and the elastic displacement reduction mechanism 30 are a combined device driven by the same driving mechanism to achieve coarse and fine adjustment of the first bearing seat 131 in the up and down directions. The matching structure of the two is as follows.

[0042] See also Figure 6The wedge block adjustment mechanism 20 includes an upper wedge block 22 and a lower wedge block 21 which are sequentially arranged in the up-down direction. The front-to-back dimension of the upper wedge block 22 is consistent with the front-to-back dimension of the installation space of the side frame 100, so that it can only slide up and down relative to the frame 10, while the front-to-back dimension of the lower frame 10 is smaller than the front-to-back dimension of the installation space of the side frame 100, so that it can slide forward and backward relative to the side frame 100. Specifically, the bottom of the lower wedge block 21 is a horizontal plane, and the top has a first guide slope 211, and the first guide slope 211 is inclined upward from front to back. The upper wedge block 22 is located above the lower wedge block 21, and the top is a horizontal plane, and the bottom has a second guide slope 221 which is consistent with the inclination direction of the first guide slope 211. When the lower wedge block 21 is driven by an external force to move forward and backward, the movement of the lower wedge block 21 in the front-to-back direction can be converted into the movement of the upper wedge block 22 in the up-down direction through the sliding fit of the guide slopes between the lower wedge block 21 and the upper wedge block 22.

[0043] See also Figure 4 The wedge block adjustment mechanism 20 also includes a driving slider 23, which is slidably arranged on the top of the upper wedge block 22. Specifically, a limiting slide groove 223 extending in the front-to-back direction is provided on the top surface of the upper wedge block 22, and the bottom of the driving slider 23 is slidably limited in the limiting slide groove 223, thereby ensuring the stability of the forward and backward movement. More specifically, the driving mechanism includes a driving motor 24, and the driving motor 24 is placed on a connecting frame 27, and the connecting frame 27 is connected to the front part of the upper wedge block 22, so that the driving motor 24 can move together with the upper wedge block 22 during the upward and downward movement. The driving motor 24 of this embodiment adopts a through-type linear motor, and the lead screw 25 of the driving motor 24 is connected to the driving slider 23. When the driving motor 24 is in motion, the lead screw 25 of the driving motor 24 is extended and retracted to drive the driving slider 23 to move forward and backward.

[0044] The top of the driving slider 23 has a third guide slope 232 which is substantially consistent with the inclination direction of the first guide slope 211 of the lower wedge block 21. The bottom of the driving slider 23 has a driving rod 231 extending downward. Specifically, the upper wedge block 22 has a first clearance hole 222 which passes through from top to bottom, and the lower wedge block 21 has a second clearance hole 212 at least at the top position corresponding to the first clearance hole 222. The driving rod 231 of the driving slider 23 passes through the first clearance hole 222 and can extend into the second clearance hole 212. The size of the second clearance hole 212 in the front-to-back direction is smaller than that of the first clearance hole 222 in the front-to-back direction, and the size of the second clearance hole 212 in the front-to-back direction is also larger than that of the driving rod 231 itself in the front-to-back direction. As a result, the driving rod 231 can move forward or backward relative to the lower wedge block 21 (that is, the lower wedge block 21 remains stationary). At the same time, after the driving rod 231 moves forward or backward for a certain distance, it can contact the lower wedge block 21 and drive the lower wedge block 21 to move forward and backward.

[0045] The first guide slope 211 and the second guide slope 221 of the lower wedge block 21 of this embodiment can be arranged so that relative displacement can only be generated by external force through material selection or setting of the inclination angle, and the two can remain relatively stationary (due to the existence of friction) after the external force is removed.

[0046] The elastic displacement reduction mechanism 30 is disposed between the upper wedge block 22 of the wedge block adjustment mechanism 20 and the first bearing seat 131, and provides support for the first bearing seat 131. During the operation of the wedge block adjustment mechanism 20, the elastic displacement reduction mechanism 30 can move up and down as a whole along with the upper wedge block 22, thereby roughly adjusting the height position of the first bearing seat 131. When the first bearing seat 131 is roughly adjusted to a height position close to the set height position, the elastic displacement reduction mechanism 30 drives the first bearing seat 131 to be finely adjusted up and down.

[0047] See also Figure 7 , the elastic displacement reduction mechanism 30 of this embodiment is preferably a bridge-type flexible hinge mechanism. The bridge-type flexible hinge mechanism includes a first bridge arm 31, a second bridge arm 32, a third bridge arm 33, a fourth bridge arm 34, a fifth bridge arm 35, a sixth bridge arm 36, a seventh bridge arm 37 and an eighth bridge arm 38 located on the same vertical plane in the front-to-back direction. Specifically, the first bridge arm 31, the second bridge arm 32, the third bridge arm 33, the fourth bridge arm 34 and the fifth bridge arm 35 are connected in series end to end through flexible hinges to form an overall inverted U-shaped bridge arm support assembly, and both ends of the bridge arm support assembly are rotatably connected to the upper wedge block 22 through flexible hinges, such as Figure 7As shown, the lower end of the first bridge arm 31 is connected to the top rear side of the upper wedge block 22 through the first fixed seat 391 by screws, and the lower end of the first bridge arm 31 and the first fixed seat 391 are rotated by a flexible hinge g, and the lower end of the fifth bridge arm 35 is connected to the top front side of the upper wedge block 22 through the second fixed seat 392 by screws, and the lower end of the fifth bridge arm 35 and the second fixed seat 392 are rotated by a flexible hinge e. The first bridge arm 31 and the second bridge arm 32 are both extended vertically and located at the rear side of the third bridge arm 33. The fourth bridge arm 34 and the fifth bridge arm 35 are both extended vertically and located at the front side of the third bridge arm 33. The sixth bridge arm 36 and the seventh bridge arm 37 are located inside the inverted U-shaped bridge arm support assembly, and are both extended in the front and rear directions, and the two are also rotatably connected by a flexible hinge f. The rear end of the sixth bridge arm 36, the first bridge arm 31 and the second bridge arm 32 are rotatably connected by a flexible hinge a. The front end of the seventh bridge arm 37, the fourth bridge arm 34 and the fifth bridge arm 35 are rotationally connected through a flexible hinge d. The third bridge arm 33 extends horizontally, specifically supported at the bottom of the first bearing seat 131, thereby constituting the power output end of the elastic displacement reduction mechanism 30. Among them, the rear end of the third bridge arm 33 is rotationally connected to the upper end of the second bridge arm 32 through a flexible hinge b, and the front end of the third bridge arm 33 is rotationally connected to the upper end of the fourth bridge arm 34 through a flexible hinge c. The eighth bridge arm 38 extends vertically, and its upper end is correspondingly rotationally connected to the flexible hinge f between the sixth bridge arm 36 and the seventh bridge arm 37, and its lower end is against the third guide slope 232 of the driving slider 23. The eighth bridge arm 38 constitutes the power input end of the elastic displacement reduction mechanism 30.

[0048] The third guide slope 232 of the driving slider 23 is also inclined upward from front to back, that is, it is consistent with the inclination direction of the first guide slope 211 of the lower wedge block 21. The top of the upper wedge block 22 is also provided with a guide bracket 26 extending upward. Specifically, the guide bracket 26 is located at the front side of the eighth bridge arm 38, that is, it is limited at the front side of the eighth bridge arm 38 so that it always remains in a vertical state to avoid swinging forward. In addition, since the third guide slope 232 is also inclined upward from front to back, the third guide slope 232 of the upper wedge block 22 itself can also be limited at the rear side of the eighth bridge arm 38 to avoid the eighth bridge arm 38 from swinging backward. The guide bracket 26 also has a clearance groove 260 that runs through from front to back for the driving slider 23 to pass through, so as to avoid the interference of the guide bracket 26 with the forward and backward movement of the driving slider 23.

[0049] When the driving slider 23 moves forward and backward, the eighth bridge arm 38 of the bridge-type flexible hinge mechanism will also be displaced in the up and down directions accordingly (the movement direction of the eighth bridge arm 38 is shown in FIG. Figure 7The bridge-type flexible hinge mechanism can reduce the displacement of the power input end in the up-down direction by a set ratio and then pass through the power output end (the moving direction of the power output end is shown in Figure 7 The output is in the A2 direction shown in the figure and acts on the first bearing seat 131, and the reduction ratio can reach one tenth.

[0050] The above-mentioned bridge-type flexible hinge mechanism design adopts a compact and symmetrical structure, and its input and output have a good linear relationship and can achieve a large displacement scaling ratio.

[0051] The gap adjustment process of the micro roller machine for rolling the battery pole piece of this embodiment is as follows:

[0052] 1. Adjustment process to reduce the gap between upper and lower rollers:

[0053] The driving motor 24 drives the lead screw 25 to move, thereby driving the driving slider 23 to move forward. When the driving rod 231 extending downward from the driving slider 23 contacts the lower wedge block 21, the coarse adjustment process begins, driving the lower wedge block 21 to move forward, and the lower wedge block 21 pushes the upper wedge block 22 and other structural parts fixed on the upper wedge block 22 to move upward. At the same time, the third guide slope 232 on the top of the driving slider 23 pushes the eighth bridge arm 38 of the bridge-type flexible hinge mechanism to move upward, that is, the flexible hinge f of the bridge-type flexible hinge mechanism moves upward, driving the flexible hinge a and the flexible hinge d to move inward at the same time, thereby pushing the flexible hinge b and the flexible hinge c. Move up, when the gap between the upper and lower rollers is slightly smaller than the required gap, stop coarse adjustment; then drive motor 24 to rotate in the opposite direction, drive slider 23 to move backward, and drive rod 231 extending downward from driving slider 23 disengages from lower wedge block 21 to enter fine adjustment process. At this time, the upper and lower wedge blocks 21 remain relatively static due to self-locking due to friction, drive the third guide slope 232 on the top of slider 23 to move backward, the flexible hinge f of the bridge-type flexible hinge mechanism moves downward, the flexible hinge a and the flexible hinge d move outward (forward and backward direction) at the same time, and the flexible hinge b and the flexible hinge c move downward to achieve fine adjustment until the upper and lower rollers reach the required gap.

[0054] Adjustment process to increase the gap between upper and lower rollers:

[0055] The driving motor 24 drives the lead screw 25 to move, thereby driving the driving slider 23 to move backward. When the driving rod 231 extending downward from the driving slider 23 contacts the lower wedge block 21, the coarse adjustment process begins, driving the lower wedge block 21 to move backward. The upper wedge block 22 and other structural parts fixed on the upper wedge block 22 move downward under the gravity of the lower roller (and the first bearing seat 131, the first bearing 141 and other components). At the same time, the third guide slope 232 on the top of the driving slider 23 moves backward. The eighth bridge arm 38 of the bridge-type flexible hinge mechanism moves downward due to the gravity of the lower roller, that is, the flexible hinge f of the bridge-type flexible hinge mechanism moves downward, the flexible hinge a and the flexible hinge d move outward at the same time, and the flexible hinge b and the flexible hinge d move outward at the same time. The third guide bevel 232 pushes the eighth bridge arm 38 of the bridge-type flexible hinge mechanism to move upward, that is, the flexible hinge f of the bridge-type flexible hinge mechanism moves upward, driving the flexible hinge a and the flexible hinge d to move inward at the same time, thereby pushing the flexible hinge b and the flexible hinge c to move upward, and realizing fine-tuning, until the upper and lower rollers reach the required gap.

[0056] The "flexible hinge" in the present invention can be understood as a flexible component that can produce obvious elastic deformation under the action of torque, thereby playing the role of a hinge in the mechanical structure; the "bridge-type flexible hinge mechanism" is an integrated part composed of multiple flexible hinges and corresponding bridge arms, which can be understood as a flexible mechanism that can achieve micro-displacement (micrometer level) movement.

Claims

1. A micro roller machine for rolling battery pole pieces, include: Frame (10); A roller assembly, comprising a fixed roller (11) and a movable roller (12) arranged opposite to each other in the up-down direction, wherein the movable roller (12) is located below the fixed roller (11), and the movable roller (12) is slidably arranged on the frame (10) in a manner that it can move up and down relative to the fixed roller (11) and its position is adjustable; The invention is characterized in that it also includes two gap adjustment devices which are arranged opposite to each other in the left-right direction and correspond to the left and right ends of the movable roller (12), each gap adjustment device comprising: A wedge block adjustment mechanism (20) is arranged on the frame (10) and supported under the movable roller (12), comprising an upper wedge block (22) and a lower wedge block (21) arranged in sequence in the up-down direction, wherein the lower wedge block (21) can be driven by a driving mechanism to slide forward and backward, and the lower wedge block (21) and the upper wedge block (22) are slidably matched via a guide inclined surface so that the movement of the lower wedge block (21) in the up-down direction is converted into the movement of the upper wedge block (22) in the up-down direction; An elastic displacement reduction mechanism (30) is provided between the upper wedge block (22) and the movable roller (12). The elastic displacement reduction mechanism (30) has a power input end that can be driven by an external force to generate displacement in the up-down direction and a power output end with the same displacement direction as the power input end. The elastic displacement reduction mechanism (30) can reduce the displacement generated by the power input end in the up-down direction by a set ratio and then output it through the power output end to act on the movable roller (12).

2. The micro roller machine for rolling battery pole pieces according to claim 1, Features: The lower wedge block (21) is slidably arranged on the frame (10) forward and backward, and has a first guiding inclined surface (211) on its top; the upper wedge block (22) is located above the lower wedge block (21) and is slidably arranged on the frame (10) upward and downward; the upper wedge block (22) has a second guiding inclined surface (221) at its bottom for slidingly cooperating with the first guiding inclined surface (211) of the lower wedge block (21); the first guiding inclined surface (211) and the second guiding inclined surface (221) of the lower wedge block (21) are configured to be able to cause relative displacement of the upper and lower wedge blocks (21) only when driven by external force, and to keep the two in a relatively static state after the external force is removed; The wedge block adjustment mechanism (20) further comprises a driving slider (23), which is driven by the driving mechanism and is arranged on the top of the upper wedge block (22) so as to be able to slide forward and backward. The bottom of the driving slider (23) has a driving rod (231) extending downward and used to drive the lower wedge block (21) to move forward and backward within a set stroke. The top of the driving slider (23) has a third guiding inclined surface (232) which is substantially consistent with the inclination direction of the first guiding inclined surface (211) of the lower wedge block (21). The third guiding inclined surface (232) acts on the power input end of the elastic displacement reduction mechanism (30) to move the power input end of the elastic displacement reduction mechanism (30) upward or downward during the forward and backward movement of the driving slider (23).

3. The micro roller machine for rolling battery pole pieces according to claim 2, Features: The upper wedge block (22) is provided with a first clearance hole (222) which passes through from top to bottom, and the lower wedge block (21) is provided with a second clearance hole (212) at least at a top position corresponding to the first clearance hole (222). The driving rod (231) of the driving slider (23) passes through the first clearance hole (222) and extends into the second clearance hole (212). The size of the second clearance hole (212) in the front-to-back direction is smaller than the size of the first clearance hole (222) in the front-to-back direction. The second clearance hole (212) is also configured to have a space allowing the driving rod (231) to move in the front-to-back direction, so that the driving rod (231) can move forward or backward relative to the lower wedge block (21).

4. The micro roller machine for rolling battery pole pieces according to claim 3, Features: The driving mechanism is a linear driving mechanism, and a power output end of the linear driving mechanism is connected to the driving slider (23).

5. The micro roller machine for rolling battery pole pieces according to claim 4, Features: The top surface of the upper wedge block (22) is a horizontal surface, on which a limiting sliding groove (223) extending in the front-rear direction is provided, and the driving sliding block (23) is slidably restrained in the limiting sliding groove (223).

6. The micro roller machine for rolling battery pole pieces according to claim 1, Features: The two ends of the movable roller (12) are respectively rotatably connected to two first bearing seats (131) arranged opposite to each other. The two first bearing seats (131) are both slidably arranged on the frame (10) up and down. The power output end of the elastic displacement reduction mechanism (30) acts on the first bearing seats (131) corresponding thereto.

7. The micro roller machine for rolling battery pole pieces according to any one of claims 2 to 5, Features: The elastic displacement reduction mechanism (30) is a bridge-type flexible hinge mechanism.

8. The micro roller machine for rolling battery pole pieces according to claim 7, Features: The bridge-type flexible hinge mechanism comprises a first bridge arm (31), a second bridge arm (32), a third bridge arm (33), a fourth bridge arm (34), a fifth bridge arm (35), a sixth bridge arm (36), a seventh bridge arm (37) and an eighth bridge arm (38) located on the same vertical plane in the front-back direction; The first bridge arm (31), the second bridge arm (32), the third bridge arm (33), the fourth bridge arm (34) and the fifth bridge arm (35) are connected in series in sequence through flexible hinges to form an inverted U-shaped bridge arm support assembly. Both ends of the bridge arm support assembly are rotatably connected to the upper wedge block (22) through flexible hinges. The third bridge arm (33) extends horizontally and acts on the movable roller (12), thereby forming a power output end of the elastic displacement reduction mechanism (30). The first bridge arm (31) and the second bridge arm (32) are both vertically extended and located at the rear side of the third bridge arm (33). The fourth bridge arm (34) and the fifth bridge arm (35) are both vertically extended and located at the front side of the third bridge arm (33). The sixth bridge arm (36) and the seventh bridge arm (37) are located inside the inverted U-shaped bridge arm support assembly and are both extended in the front-to-back direction. The two are also rotatably connected via a flexible hinge. The rear end of the sixth bridge arm (36) is rotatably connected to a flexible hinge correspondingly arranged between the first bridge arm (31) and the second bridge arm (32). The front end of the seventh bridge arm (37) is rotatably connected to a flexible hinge correspondingly arranged between the fourth bridge arm (34) and the fifth bridge arm (35). The eighth bridge arm (38) extends vertically, and its upper end is rotatably connected to a flexible hinge correspondingly arranged between the sixth bridge arm (36) and the seventh bridge arm (37), and its lower end abuts against the third guide inclined surface (232) of the driving slider (23), thereby forming a power input end of the elastic displacement reduction mechanism (30).

9. The micro roller machine for rolling battery pole pieces according to claim 8, Features: The third guide inclined surface (232) of the driving slider (23) is inclined upward from front to back, and the top of the upper wedge block (22) is also provided with a guide bracket (26) extending upward to limit the front side of the eighth bridge arm (38).

10. The micro roller machine for rolling battery pole pieces according to claim 9, Features: The guide bracket (26) has a clearance groove (260) which penetrates front and back and allows the driving slider (23) to pass through the groove.

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