A wire-tying mechanism for a battery steel shell

Abstract

The present invention discloses a wire tying mechanism for a battery steel shell. A wire tying depth fine-tuning mechanism is provided at the upper end of the sliding rod. The wire tying depth fine-tuning mechanism includes a first adjusting sleeve, a second adjusting sleeve and an equalizing sleeve. The first adjusting sleeve is sleeved on the sliding rod and is threadedly connected to the upper end of the sliding rod with external threads. The upper end of the first adjusting sleeve protruding above the bearing sleeve radially extends outward with a limiting portion. The limiting portion of the first adjusting sleeve and the second adjusting sleeve are both hollow and have a regular polygon cross-section. The second adjusting sleeve is located above the first adjusting sleeve and is sleeved and fixed on the sliding rod. The equalizing sleeve is sleeved outside the limiting portion of the first adjusting sleeve and the second adjusting sleeve. During the adjustment of the wire tying depth of the battery steel shell in the present invention, there is no need to disassemble and assemble the bearing sleeve and the second bearing. It is only necessary to lift the equalizing sleeve connecting the sliding rod and the limiting portion of the first adjusting sleeve and rotate the sliding rod, which greatly improves the convenience of adjustment.

Description

Technical Field

[0001] The present invention relates to the field of battery wire-tying equipment, and particularly to a wire-tying mechanism for a battery steel shell. Background Art

[0002] During the battery production process, "wire-tying" is usually performed on the outer side of one end of the battery steel shell. Currently, for the "wire-tying" operation of the battery steel shell, as Figure 1 shown, it is to clamp and position the erected battery steel shell 1000 by a pair of upper and lower dies (101, 102) on a wire-tying machine, and then two wire-tying wheels 103 that hold the battery steel shell tightly on both sides of the battery steel shell 1000 and rotate at high speed with the axial direction of the battery steel shell 1000 as the rotation axis perform wire-tying on the battery steel shell, so as to form an annular groove on the outer wall of the battery steel shell. On the wire-tying machine, the upper die 101 and the two wire-tying wheels 103 are both installed on the rotating shaft assembly 104 of the wire-tying mechanism. Among them, the upper die 101 is installed at the lower end of the rotating shaft assembly 104 through a bearing, and the two wire-tying wheels 103 are located on both sides of the upper die 101 and are swingably installed on the rotating shaft assembly 104. In order to swing the two wire-tying wheels 103 to approach or move away from the battery steel shell 1000 clamped between the upper and lower dies (101, 102) to realize the tight wire-tying of the battery steel shell 1000 or the release of the battery steel shell 1000, a slide rod 105 that can slide up and down relative to the rotating shaft assembly 104 is axially penetrated and installed in the rotating shaft assembly 104. The lower end of the slide rod 105 is a frustum structure. The lower end of the slide rod 105 is located between the upper ends of the swing arms of the two wire-tying wheels 103. The upper end of the slide rod 105 is installed on a bearing sleeve 106 through a bearing. The bearing sleeve 106 is horizontally limited in a cam groove 1071 with a vertically curved change in the horizontal height on a cam mechanism 107. Since the entire wire-tying mechanism is installed on a turntable 108, under the drive of the turntable 108, the bearing sleeve 106, the slide rod 105 and the entire wire-tying mechanism all rotate along the cam groove 1071 of the cam mechanism 107. Corresponding to the curve change of the cam groove 1071, the bearing sleeve 106 and the slide rod 105 installed thereon perform up and down movements. The up and down moving slide rod 105 controls the two wire-tying wheels 103 to approach or move away from the battery steel shell 1000 to realize the wire-tying of the battery steel shell.

[0003] In a wire tying machine, the installation height of the sliding rod 105 directly affects and determines the wire tying depth of the battery steel shell. To achieve precise wire tying of the battery steel shell or wire tying of battery steel shells with different wire tying requirements, it is often necessary to adjust the installation height of the sliding rod 105. And because it is only known whether the installation position of the sliding rod 105 is accurate after the wire tying operation is carried out after the sliding rod 105 is installed. If it is not accurate, the sliding rod 105 needs to be removed and the installation position of the sliding rod 105 needs to be adjusted repeatedly many times. However, the existing sliding rod 105 is directly installed on the bearing sleeve 106. When adjusting the installation height of the sliding rod 105, the bearing sleeve 106 and the sliding rod 105 need to be separated, and then reinstalled after separation, which is very inconvenient to operate, and the adjustment accuracy cannot be guaranteed.

[0004] At the same time, in the wire tying mechanism of the traditional battery steel shell, there is direct sliding friction between the lower end of the sliding rod 105 and the upper ends of the swing walls of the two wire tying wheels 103. The sliding rod 105 and the upper ends of the swing walls of the two wire tying wheels 103 are very easy to be worn, which affects the wire tying control. And because when the upper die 101 limits the battery steel shell, it will cause wear on the lower end face and the side surface of the upper die 101. After using for a period of time, it often needs to be replaced. However, the existing upper die 101 of the wire tying mechanism is an integral structure. Once wear occurs, the entire lower die 101 needs to be removed for replacement, which is not only cumbersome to replace, but also causes a great waste of part materials, greatly increasing the production cost of the battery. Summary of the Invention

[0005] The purpose of the present invention is to provide a wire tying mechanism for a battery steel shell.

[0006] The technical solution for achieving the object of the present invention is: a wire tying mechanism for a battery steel shell, which includes a turntable, a rotating shaft assembly with a hollow chamber, an upper mold, a wire tying wheel assembly, a sliding rod, a bearing sleeve, and a cam mechanism installed above the turntable. The rotating shaft assembly vertically penetrates and is rotatably installed on the turntable. The upper mold is installed at the lower end of the rotating shaft assembly through a first bearing. The two wire tying wheel assemblies are located on both sides of the upper mold. Each wire tying wheel assembly includes a swing arm and a wire tying wheel. The middle of the swing arm is hinged to the lower end of the rotating shaft assembly. The upper end of the swing arm is located in the chamber of the rotating shaft assembly. The wire tying wheel is installed at the lower end of the swing arm. The hinge axes of the middle parts of the swing arms of the two wire tying wheel assemblies are horizontally parallel to the lower end of the rotating shaft assembly. The sliding rod is coaxially and vertically slidably installed in the hollow chamber of the rotating shaft assembly. The lower end of the sliding rod is a frustum structure with a gradually narrowing width from top to bottom. The lower end of the sliding rod is located between the upper ends of the swing arms of the wire tying wheel assembly. There are also more than two sets of reset spring mechanisms installed on the side wall of the rotating shaft assembly that respectively push against the upper ends of the two swing arms inward. The upper end of the sliding rod is provided with a wire tying depth fine-tuning mechanism. The wire tying depth fine-tuning mechanism includes a first adjusting sleeve, a second adjusting sleeve, and an equalizing sleeve. The first adjusting sleeve has an internal thread. The first adjusting sleeve is sleeved on the sliding rod and is threadedly connected to the upper end of the sliding rod with an external thread. The first adjusting sleeve is installed in the bearing sleeve horizontally limited by the cam mechanism through a second bearing. The upper end of the first adjusting sleeve protrudes above the bearing sleeve. The upper end of the first adjusting sleeve protruding above the bearing sleeve radially extends outward with a limiting portion. The limiting portion of the first adjusting sleeve and the second adjusting sleeve are both hollow and have a regular polygon cross-section. The number of sides of the limiting portion of the first adjusting sleeve and the second adjusting sleeve is the same, and the circumradius is the same. The second adjusting sleeve is located above the first adjusting sleeve and is fixed to the sliding rod. The inner hole surface cross-section of the equalizing sleeve is a uniformly regular triangular waveform. The groove angle of the inner hole surface of the triangular waveform of the equalizing sleeve is equal to the inner angle of the regular polygon structure of the limiting portion of the first adjusting sleeve. The circumradius of the inner hole surface of the triangular waveform of the equalizing sleeve is the same as the circumradius of the regular polygon structure of the limiting portion of the first adjusting sleeve. The number of groove angles on the inner hole surface of the equalizing sleeve is an integer multiple of the number of sides of the regular polygon structure of the limiting portion of the first adjusting sleeve. The equalizing sleeve is sleeved outside the limiting portion of the first adjusting sleeve and the second adjusting sleeve.

[0007] Further, the number of sides of the limiting portion of the first adjusting sleeve is three or more. The cross-section of the limiting portion of the first adjusting sleeve can be a hollow regular triangle, square, regular pentagon, regular hexagon, or a regular polygon with more sides.

[0008] Further, the cross-section of the limiting portion of the first adjusting sleeve is a hollow regular hexagon. The regular hexagon structure is more conventional, easier to process, and more convenient to obtain materials.

[0009] Furthermore, the number of groove angles on the inner hole surface of the equalizing sleeve is 3 to 5 times the number of sides of the regular polygon structure of the limiting part of the first adjusting sleeve. The number of groove angles on the inner hole surface of the equalizing sleeve is relatively higher than the number of sides of the regular polygon structure of the limiting part of the first adjusting sleeve. The more the number of groove angles on the inner hole surface of the equalizing sleeve, the higher the adjustment accuracy. However, considering actual processing, the number of groove angles on the inner hole surface of the equalizing sleeve is usually 3 to 5 times the number of sides of the regular polygon structure of the limiting part of the first adjusting sleeve.

[0010] Furthermore, the number of groove angles on the inner hole surface of the equalizing sleeve is 4 times the number of sides of the regular polygon structure of the limiting part of the first adjusting sleeve.

[0011] Furthermore, the number of groove angles on the inner hole surface of the equalizing sleeve is 24.

[0012] Furthermore, a threaded through-hole is provided on the equalizing sleeve, and a locking screw is inserted into the threaded through-hole. The locking screw transversely presses and fixes the first adjusting sleeve. After the equalizing sleeve is sleeved outside the first adjusting sleeve and the second adjusting sleeve, the first adjusting sleeve can be locked by the locking screw, avoiding the equalizing sleeve from slipping out of the limiting part of the first adjusting sleeve due to vibration or accident, which may cause unplanned adjustment, and ensuring the stability of the structure. During adjustment, only need to loosen the locking screw first, and then lift the equalizing sleeve; after adjustment, tighten the locking screw again.

[0013] Furthermore, the second adjusting sleeve is fixed to the sliding rod by a set screw. This setting facilitates the disassembly and assembly of the second adjusting sleeve.

[0014] Furthermore, a first gasket sleeved on the sliding rod is installed between the limiting part of the first adjusting sleeve and the bearing sleeve. The first gasket isolates the equalizing sleeve from the second bearing and the bearing sleeve, avoiding wear of the second bearing and the bearing sleeve due to the operation of sleeving the equalizing sleeve into the limiting part of the first adjusting sleeve.

[0015] Furthermore, a roller is installed at the upper end of the swing arm in each wire-tying wheel assembly, and the lower end of the sliding rod is located between the two rollers at the upper ends of the two swing arms. In the wire-tying mechanism for the battery steel shell of the present invention, by installing rollers at the upper ends of the swing arms of each wire-tying wheel assembly, during the up and down movement of the sliding rod, rolling friction is formed between the sliding rod and the rollers, with small frictional force, the sliding rod is not easily worn, and the wire-tying accuracy and quality of the battery steel shell are high.

[0016] Furthermore, the rotating shaft assembly includes a rotating shaft, a rotating shaft sleeve and a shaft end block coaxially installed in sequence from top to bottom. The rotating shaft and the rotating shaft sleeve are hollow, and the chamber of the rotating shaft sleeve is wider than the chamber of the rotating shaft. The sliding rod is installed in the rotating shaft, the upper die and the two wire-tying wheel assemblies are installed on the shaft end block, the upper end of the upper die extends into the chamber of the rotating shaft sleeve, and the reset spring mechanism is installed on the rotating shaft sleeve.

[0017] Further, a second gasket is clamped between the wire tying wheel and the swing arm. The second gasket is used to adjust the installation height of the wire tying wheel, so that the installation heights of the wire tying wheels on both sides are the same. When tying the wire on the battery steel shell, the wire tying trajectories are the same.

[0018] Further, the return spring mechanism includes a push rod, a compression spring and a stop block which are sequentially arranged from inside to outside in a horizontal through hole on the side wall of the rotating shaft assembly. The push rod abuts against the swing arm, and the stop block is locked to the rotating shaft assembly by bolts. In the return spring mechanism, under the action of the compression spring, the push rod always has a force acting on the swing arm to push upwards, so that the wire tying wheels of the two wire tying wheel assemblies have a force to open outwards. When the slide rod pushes the swing arm downwards, the compression spring is compressed and deformed, and the wire tying wheels move closer to each other.

[0019] Further, the upper die includes a mounting shaft, a wire tying end block and a wire tying pin. The mounting shaft is mounted at the lower end of the rotating shaft assembly through a first bearing. The lower end of the mounting shaft is a stepped shaft end. The wire tying end block is a cup structure. One end of the wire tying end block is open and hollow inside. A first through hole is formed in the bottom of the cup of the wire tying end block. The diameter of the first through hole is the same as the diameter of the end head of the stepped shaft end of the mounting shaft. The first through hole of the wire tying end block passes through and sleeves on the end head of the stepped shaft end of the mounting shaft. The open end of the wire tying end block faces away from the mounting shaft. The wire tying pin is a columnar structure. The outer diameter of the wire tying pin is the same as the inner diameter of the wire tying end block. First chambers and second chambers are respectively arranged at both ends of the wire tying pin along its axial direction. The first chamber and the second chamber are axially communicated by a second through hole. The inner diameter of the first chamber is the same as the diameter of the end head of the stepped shaft end of the mounting shaft. The wire tying pin is sleeved outside the end head of the stepped shaft end of the mounting shaft and inside the wire tying end block. The end head of the stepped shaft end of the mounting shaft is located in the first chamber of the wire tying pin. A bolt passes through the second through hole of the wire tying pin and is locked to the end head of the stepped shaft end of the mounting shaft. The nut of the bolt is located in the second chamber of the wire tying pin and does not protrude above the end face of the second chamber. The stepped surface of the stepped shaft end of the mounting shaft, the wire tying end block and the wire tying pin are sequentially clamped. During operation, the open end of the battery steel shell is sleeved outside the end side of the second chamber of the wire tying pin, and the end face of the open end of the battery steel shell abuts against the open end face of the wire tying end block. In the present invention, the open end of the battery steel shell placed on the lower die is sleeved outside the end side of the second chamber of the wire tying pin to realize the radial positioning of the battery steel shell; the end face of the open end of the battery steel shell abuts against the open end face of the wire tying end block, and the upper die and the lower die together perform axial positioning on the battery steel shell. The upper die of the present invention is composed of a mounting shaft, a wire tying end block and a wire tying pin. During the wire tying process of the battery steel shell, the easily worn wire tying end block and wire tying pin form a split structure with the mounting shaft. After the wire tying end block and the wire tying pin are worn, only the wire tying end block and the wire tying pin need to be replaced separately, without replacing the entire upper die. On the one hand, it greatly saves the production cost and reduces material waste; on the other hand, it avoids the disassembly and assembly of the bearing during the replacement of the entire upper die. When replacing the wire tying end block and the wire tying pin, only the bolt needs to be disassembled, and the disassembly, replacement and operation are more convenient.

[0020] Furthermore, the first chamber and the second chamber of the wire tying pin are symmetrically arranged along the axial direction of the wire tying pin. With the symmetrical arrangement of the first chamber and the second chamber, when the outer wall on the second chamber side of the wire tying pin is worn, it can be used after turning it around, which extends the service life of the wire tying pin and reduces the production cost.

[0021] Furthermore, an adjusting piece is pressed between the step surface at the stepped shaft end of the mounting shaft and the wire tying end block. The use of the adjusting piece can adjust the mounting height of the wire tying end block and the wire tying pin, facilitating the installation and positioning of the wire tying end block and the wire tying pin.

[0022] In the wire tying mechanism for the battery steel shell of the present invention, by sleeving an outer thread of the sliding rod with a first adjusting sleeve installed with a bearing sleeve through a second bearing, the direct installation of the sliding rod and the bearing sleeve is avoided. At the same time, the sliding rod can rotate relative to the first adjusting sleeve and the bearing sleeve and move up and down. Furthermore, during the adjustment process of the wire tying depth of the battery steel shell, there is no need to disassemble and assemble the bearing sleeve and the second bearing. Only by lifting the equalizing sleeve connecting the limiting part of the sliding rod and the first adjusting sleeve and rotating the sliding rod can the adjustment be achieved, which greatly improves the convenience of adjustment. Moreover, in the present invention, by increasing the number of groove angles on the inner hole surface of the equalizing sleeve, the up and down movement position of the sliding rod can be adjusted with high precision. For example, when the number of groove angles on the inner hole surface of the equalizing sleeve is set to 24, the adjustment precision of the up and down movement position of the sliding rod can reach as high as 0.01 mm. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of the wire tying mechanism of a traditional battery steel shell;

[0024] Figure 2 is a schematic structural diagram of the wire tying mechanism for the battery steel shell of the present invention;

[0025] Figure 3 is a sectional structural diagram of the wire tying mechanism for the battery steel shell of the present invention;

[0026] Figure 4 is a partial structural diagram of the wire tying mechanism for the battery steel shell of the present invention corresponding to the wire tying depth fine adjustment mechanism;

[0027] Figure 5 is a schematic structural diagram of the first adjusting sleeve of the wire tying depth fine adjustment mechanism in the wire tying mechanism for the battery steel shell of the present invention;

[0028] Figure 6 is a schematic structural diagram of the second adjusting sleeve of the wire tying depth fine adjustment mechanism in the wire tying mechanism for the battery steel shell of the present invention;

[0029] Figure 7 is a schematic structural diagram of the equalizing sleeve of the wire tying depth fine adjustment mechanism in the wire tying mechanism for the battery steel shell of the present invention;

[0030] Figure 8It is a schematic structural diagram of the first adjusting sleeve and the second adjusting sleeve of the wire tying depth fine-tuning mechanism in the battery steel shell wire tying mechanism of the present invention sleeved in the equal division sleeve;

[0031] Figure 9 It is a schematic structural diagram during the adjustment of the wire tying depth fine-tuning mechanism in the battery steel shell wire tying mechanism of the present invention;

[0032] Figure 10 It is a developed view of the cam mechanism of the battery steel shell wire tying mechanism of the present invention;

[0033] Figure 11 It is a partial structural schematic diagram of the battery steel shell wire tying mechanism of the present invention corresponding to the wire tying wheel assembly;

[0034] Figure 12 It is a schematic structural diagram of the upper die of the battery steel shell wire tying mechanism of the present invention. Specific Embodiments

[0035] The following will make a detailed description of the specific embodiments of the battery steel shell wire tying mechanism of the present invention with reference to the accompanying drawings:

[0036] As Figures 2 to 9As shown in the figure, a wire tying mechanism for a battery steel shell includes a turntable 10, a rotating shaft assembly 1 with a hollow chamber 11, an upper mold 2, a wire tying wheel assembly 3, a slide rod 4, a bearing sleeve 5, and a cam mechanism 20 installed above the turntable 10. The rotating shaft assembly 1 vertically penetrates and is rotatably installed on the turntable 10. The upper mold 2 is installed at the lower end of the rotating shaft assembly 1 through a first bearing 201. The two wire tying wheel assemblies 3 are located on both sides of the upper mold 2. Each wire tying wheel assembly 3 includes a swing arm 31 and a wire tying wheel 32. The middle of the swing arm 31 is hinged to the lower end of the rotating shaft assembly 1. The upper end of the swing arm 31 is located in the hollow chamber 11 of the rotating shaft assembly 1. The wire tying wheel 32 is installed at the lower end of the swing arm 31. The hinge shafts 310 at the middle of the swing arms 31 of the two wire tying wheel assemblies 3 are horizontally parallel to the lower end of the rotating shaft assembly 1. The slide rod 4 is coaxially and slidably installed in the hollow chamber 11 of the rotating shaft assembly 1. The lower end 41 of the slide rod 4 is a frustum structure with a gradually narrowing width from top to bottom. The lower end 41 of the slide rod 4 is located between the upper ends of the two swing arms 31 of the wire tying wheel assembly 3. Two or more sets of reset spring mechanisms 33 that respectively push against the upper ends of the two swing arms 31 inward are also installed on the side wall of the rotating shaft assembly 1. A wire tying depth fine-tuning mechanism 6 is provided at the upper end of the slide rod 4. The wire tying depth fine-tuning mechanism 6 includes a first adjusting sleeve 61, a second adjusting sleeve 62, and an equalizing sleeve 63. The first adjusting sleeve 61 has an internal thread 611. The first adjusting sleeve 61 is sleeved on the slide rod 4 and is threadedly connected to the upper end of the slide rod 4 with an external thread. The first adjusting sleeve 61 is installed in the bearing sleeve 5 that is horizontally limited on the cam mechanism 20 through a second bearing 501. The upper end of the first adjusting sleeve 61 protrudes above the bearing sleeve 5. A limiting portion 612 extends radially outward from the upper end of the first adjusting sleeve 61 that protrudes above the bearing sleeve 5. Both the limiting portion 612 of the first adjusting sleeve 61 and the second adjusting sleeve 62 are hollow and have a regular polygon cross-section. The limiting portion 612 of the first adjusting sleeve 61 and the second adjusting sleeve 62 have the same number of sides and the same circumradius. The second adjusting sleeve 62 is located above the first adjusting sleeve 61 and is fixedly sleeved on the slide rod 4. The inner hole surface 631 of the equalizing sleeve 63 has a uniform and regular triangular waveform cross-section. The groove angle α of the inner hole surface 631 of the triangular waveform of the equalizing sleeve 63 is equal to the inner angle β of the regular polygon structure of the limiting portion 612 of the first adjusting sleeve. The circumradius of the inner hole surface 631 of the triangular waveform of the equalizing sleeve 63 is the same as the circumradius of the regular polygon structure of the limiting portion 612 of the first adjusting sleeve 61. The number of groove angles of the inner hole surface 631 of the equalizing sleeve 63 is an integer multiple of the number of sides of the regular polygon structure of the limiting portion 612 of the first adjusting sleeve 61. The equalizing sleeve 63 is sleeved outside the limiting portion 612 of the first adjusting sleeve 61 and the second adjusting sleeve 62.

[0037] In the wire tying mechanism for a battery steel shell of the present invention, during operation, the battery steel shell is positioned between the paired upper mold 2 and the lower mold (not shown in the figure). The turntable 10 rotates. Driven by the turntable 10, the bearing sleeve 5, the slide rod 4, and the entire wire tying mechanism all rotate along the cam mechanism 20. Specifically, the cam mechanism 20 usually has a cam groove 200, such asFigure 10 As shown, the horizontal height of the cam groove 200 changes in an up-and-down curve along the circumferential direction, and the bearing sleeve 5 is laterally limited in the cam groove 200 of the cam mechanism 20. During the rotation of the turntable, the slide bar 4 moves up and down with the curve change of the cam groove 200. At the same time, the two wire-binding wheel assemblies 3 are installed on the rotating shaft assembly 1. During the working process, the rotating shaft assembly 1 automatically drives the two wire-binding wheel assemblies 3 to rotate along the axis of the rotating shaft assembly 1.

[0038] The battery steel shell wire-binding mechanism of the present invention has a truncated cone structure whose width gradually narrows from top to bottom, and the sliding rod 4 moving up and down determines the degree of opening the swing arms 31 of the two wire-binding wheel assemblies 3, thereby controlling the two wire-binding wheels 32 to approach or move away from the battery steel shell 100. Specifically, when tying wires, the sliding rod 4 moves downward, pushes open the upper ends of the swing arms 31 of the two wire-binding wheel assemblies 3, and makes the wire-binding wheels 32 of the two wire-binding wheel assemblies 3 approach each other, clamping the battery steel shell 100 positioned below the upper mold, so as to perform wire binding on the battery steel shell 100, and the wire binding depth of the battery steel shell 100 depends on the degree of clamping of the two wire-binding wheels 32 on the battery steel shell 100; after tying wires, the sliding rod 4 moves upward, and the two wire-binding wheel assemblies 3 are opened and moved away from each other under the top pressure of the reset spring mechanism 33 to loosen the battery steel shell 100.

[0039] The battery steel shell wire binding mechanism of the present invention, the cam mechanism 20 is an existing conventional structure, such as Figure 10 As shown, the present invention will not elaborate on its specific structure.

[0040] In the battery steel shell wire binding mechanism of the present invention, the rotating shaft assembly 1 rotates by itself, usually driven by a power mechanism through gears. Since it belongs to the existing conventional structure, the present invention will not elaborate on it in detail.

[0041] The battery steel shell wire binding mechanism of the present invention can also adjust the wire binding depth of the battery steel shell 100 through the wire binding depth fine-tuning mechanism 6. Specifically, when the installation height of the slide bar 4 is adjusted to adjust the wire binding depth of the battery steel shell, the equal-dividing sleeve 63 is lifted up, such as Figure 9 As shown, the dividing sleeve 63 is no longer mounted on the first adjustment sleeve limiter 612, but is still mounted on the second adjustment sleeve 62, and then the slide bar 4 is rotated relative to the first adjustment sleeve 61 to move the slide bar 4 up or down. After adjustment, the dividing sleeve 63 is lowered and mounted on the first adjustment sleeve limiter 612. In the battery steel shell wire binding mechanism of the present invention, when the slide bar 4 moves up, the depth of the battery steel shell wire binding becomes shallower; when the slide bar 4 moves down, the depth of the battery steel shell wire binding becomes deeper.

[0042] In the wire tying mechanism for the battery steel shell of the present invention, in the wire tying depth fine-tuning mechanism 6, the groove angle α of the circular inner hole surface 631 of the triangular waveform of the equal division sleeve 63 is equal to the inner angle β of the regular polygon structure of the first adjusting sleeve limiting portion 612, ensuring that the angle of the regular polygon structure of the first adjusting sleeve limiting portion 612 can be assembled into the groove angle of the circular inner hole surface 631 of the triangular waveform of the equal division sleeve 63; the circumradius of the inner hole surface 631 of the triangular waveform of the equal division sleeve 63 is the same as the circumradius of the regular polygon structure of the first adjusting sleeve limiting portion 612, and its function is to ensure that the first adjusting sleeve limiting portion 612 can be exactly sleeved inside the equal division sleeve 63; the number of groove angles of the inner hole surface 631 of the equal division sleeve 63 is an integer multiple of the number of sides of the regular polygon structure of the first adjusting sleeve limiting portion 612, which ensures that the first adjusting sleeve limiting portion 612 can not only be nested and clamped inside the circular inner hole of the equal division sleeve 63, but also the equal division sleeve 63 can be sleeved in several different angular positions relative to the first adjusting sleeve limiting portion 612 in the circumferential direction.

[0043] In the wire tying mechanism for the battery steel shell of the present invention, in the wire tying depth fine-tuning mechanism 6, the limiting portion 612 of the first adjusting sleeve 61 and the second adjusting sleeve 62 are both hollow regular polygon structures, and the number of sides and the circumradius of the limiting portion 612 of the first adjusting sleeve 61 and the second adjusting sleeve 62 are the same, ensuring that the second adjusting sleeve 62 can be sleeved inside the equal division sleeve 63 like the limiting portion 612 of the first adjusting sleeve 61.

[0044] In the wire tying mechanism for the battery steel shell of the present invention, after the equal division sleeve 63 is sleeved outside the first adjusting sleeve 61 and the second adjusting sleeve 62 at the same time, through the limiting connection of the equal division sleeve 63, it is ensured that there will be no relative rotation and axial movement between the second adjusting sleeve 62 and the slide rod 4 fixedly connected thereto and the first adjusting sleeve 61.

[0045] In the wire tying mechanism for the battery steel shell of the present invention, the number of groove angles of the inner hole surface 631 of the equal division sleeve 63 determines the adjustment accuracy of the wire tying depth. The more the number of groove angles of the inner hole surface 631 of the equal division sleeve 63, the higher the adjustment accuracy of the wire tying depth. When the equal division sleeve 63 rotates one groove angle position relative to the limiting portion 612 of the first adjusting sleeve 61, the axial movement distance of the slide rod 4 is the adjustment accuracy of the wire tying depth of the present invention.

[0046] The wire-tying mechanism for the battery steel shell of the present invention, by externally threadedly sleeving a first adjusting sleeve 61 on the slide rod 4 and installing the bearing sleeve 5 through a second bearing 501, avoids the direct installation of the slide rod 4 and the bearing sleeve 5, and at the same time enables the slide rod 4 to rotate relative to the first adjusting sleeve 61 and the bearing sleeve 5 and move up and down. Furthermore, during the adjustment process of the wire-tying depth of the battery steel shell, there is no need to disassemble and assemble the bearing sleeve 5 and the second bearing 501. Just lift the equalizing sleeve 63 connecting the slide rod 4 and the limiting part 612 of the first adjusting sleeve and rotate the slide rod 4, which greatly improves the convenience of adjustment. Moreover, the present invention can achieve high-precision adjustment of the up and down movement position of the slide rod 4 by increasing the number of groove angles on the inner hole surface 631 of the equalizing sleeve 63. For example, when the number of groove angles on the inner hole surface 631 of the equalizing sleeve 63 is set to 24, the adjustment accuracy of the up and down movement position of the slide rod 4 can reach as high as 0.01 mm.

[0047] For the wire-tying mechanism of the battery steel shell of the present invention, in the fine-tuning mechanism 6 for the wire-tying depth, the number of sides of the limiting part 612 of the first adjusting sleeve 61 is more than three. The cross-section of the limiting part 612 of the first adjusting sleeve 61 can be a hollow equilateral triangle, square, regular pentagon, regular hexagon or regular polygon with more sides.

[0048] For the wire-tying mechanism of the battery steel shell of the present invention, preferably, the cross-section of the limiting part 612 of the first adjusting sleeve 61 is a hollow regular hexagon. The structure of the regular hexagon is more conventional, easier to process, and more convenient to obtain materials.

[0049] For the wire-tying mechanism of the battery steel shell of the present invention, preferably, the number of groove angles on the inner hole surface 631 of the equalizing sleeve 63 is 3 to 5 times the number of sides of the regular polygon structure of the limiting part 612 of the first adjusting sleeve. The number of groove angles on the inner hole surface 631 of the equalizing sleeve 63 is higher in multiple relative to the number of sides of the regular polygon structure of the limiting part 612 of the first adjusting sleeve. The more the number of groove angles on the inner hole surface 631 of the equalizing sleeve 63, the higher the adjustment accuracy. However, considering actual processing, the number of groove angles on the inner hole surface 631 of the equalizing sleeve 63 is usually 3 to 5 times the number of sides of the regular polygon structure of the limiting part 612 of the first adjusting sleeve.

[0050] For the wire-tying mechanism of the battery steel shell of the present invention, preferably, the number of groove angles on the inner hole surface 631 of the equalizing sleeve 63 is 4 times the number of sides of the regular polygon structure of the limiting part 612 of the first adjusting sleeve.

[0051] For the wire-tying mechanism of the battery steel shell of the present invention, preferably, the number of groove angles on the inner hole surface 631 of the equalizing sleeve 63 is 24.

[0052] For the wire tying mechanism of the battery steel shell of the present invention, preferably, a threaded through hole 632 is provided on the equal division sleeve 63, and a locking screw 633 is inserted into the threaded through hole 632. The locking screw 633 transversely presses and fixes the first adjusting sleeve 61. After the equal division sleeve 63 is sleeved outside the first adjusting sleeve 61 and the second adjusting sleeve 62, the first adjusting sleeve 61 can be locked by the locking screw 633, avoiding the equal division sleeve 63 from disengaging from the limiting part 612 of the first adjusting sleeve 61 due to vibration or accident, which may cause unplanned adjustment and ensure the stability of the structure. During adjustment, only need to loosen the locking screw 633 first, and then lift the equal division sleeve 63; after adjustment, tighten the locking screw 633 again.

[0053] For the wire tying mechanism of the battery steel shell of the present invention, preferably, the second adjusting sleeve 62 is fixed to the slide bar 4 by a set screw 621. This setting facilitates the disassembly and assembly of the second adjusting sleeve 62.

[0054] For the wire tying mechanism of the battery steel shell of the present invention, preferably, a first gasket 64 sleeved on the slide bar 4 is installed between the limiting part 612 of the first adjusting sleeve and the bearing sleeve 5. The first gasket 64 isolates the equal division sleeve 63 from the second bearing 501 and the bearing sleeve 5, avoiding the wear of the second bearing 501 and the bearing sleeve 5 due to the operation of sleeving the equal division sleeve 63 into the limiting part 612 of the first adjusting sleeve.

[0055] For the wire tying mechanism of the battery steel shell of the present invention, as Figure 11 shown, preferably, a roller 311 is installed at the upper end of the swing arm 31 in each wire tying wheel assembly 3. The lower end 41 of the slide bar 4 is located between the two rollers 311 at the upper ends of the two swing arms 31. For the wire tying mechanism of the battery steel shell of the present invention, by installing a roller 311 at the upper end of the swing arm 31 in each wire tying wheel assembly 3, during the up and down movement of the slide bar 4, a rolling friction is formed between the slide bar 4 and the roller 33, with small friction, and the slide bar 4 and the upper ends of the swing arms 31 in the two wire tying wheel assemblies 3 are not easily worn, and the wire tying accuracy and quality of the battery steel shell are high.

[0056] For the wire tying mechanism of the battery steel shell of the present invention, the rotating shaft assembly 1 generally includes a rotating shaft 12, a rotating shaft sleeve 13, and a shaft end block 14 coaxially installed in sequence from top to bottom. The rotating shaft 12 and the rotating shaft sleeve 13 are hollow, and the chamber of the rotating shaft sleeve 13 is wider than the chamber of the rotating shaft 12. The slide bar 4 is installed in the rotating shaft 12, the upper die 2 and the two wire tying wheel assemblies 3 are installed on the shaft end block 14, the upper end of the upper die 2 extends into the chamber of the rotating shaft sleeve 13, and the return spring mechanism 33 is installed on the rotating shaft sleeve 13.

[0057] For the wire tying mechanism of the battery steel shell of the present invention, the rotating shaft assembly 1 is generally installed on the turntable 10 through bearings. Specifically, a bearing seat 30 is provided on the turntable 10, and the rotating shaft assembly 1 is generally installed on the bearing seat 30 through bearings.

[0058] The wire-tying mechanism for the battery steel shell of the present invention. Usually, a guide plate 40 fixedly connected thereto is also installed on the turntable 10. The upper end of the guide plate 40 has a slot 401, and the bearing sleeve 5 is usually laterally limited within the slot 401 of the guide plate 40. With this setting, when the turntable 10 drives the slide rod 4 to rotate, the acting force applied to the slide rod 4 is more balanced, and the rotation of the slide rod 4 is more stable.

[0059] For the wire-tying mechanism of the battery steel shell of the present invention, whether the bearing sleeve 5 is laterally limited within the cam groove 200 of the cam mechanism 20 or the bearing sleeve 5 is laterally limited within the slot 401 of the guide plate 40, a rolling bearing 52 is usually installed on the laterally protruding limited end 51 of the bearing sleeve 5. With this setting, the rolling bearing 52 forms a rolling friction with the cam groove 200 of the cam mechanism 20 or the slot 401 of the guide plate 40, and the frictional force is relatively small, making it easier to move.

[0060] For the wire-tying mechanism of the battery steel shell of the present invention, preferably, a second gasket 34 is clamped between the wire-tying wheel 32 and the swing arm 31. The second gasket 34 is used to adjust the installation height of the wire-tying wheel 32, so that the installation heights of the wire-tying wheels 32 on both sides are the same, and when tying the wire on the battery steel shell, the wire-tying trajectories are the same.

[0061] For the wire-tying mechanism of the battery steel shell of the present invention, the return spring mechanism 33 usually includes a push rod 331, a compression spring 332, and a stopper 333 that are sequentially arranged from the inside to the outside in a horizontal through hole on the side wall of the rotating shaft assembly 1. The push rod 331 abuts against the swing arm 31, and the stopper 333 is locked to the rotating shaft assembly 1 by bolts. In the return spring mechanism 33, under the action of the compression spring 332, the push rod 331 always has a force acting on the swing arm 31 that presses upward, so that the wire-tying wheels 32 of the two wire-tying wheel assemblies 3 have a force to open outward. When the slide rod 4 pushes the swing arm 31 downward, the compression spring 332 is compressed and deformed, and the wire-tying wheels 32 move closer to each other.

[0062] For the wire-tying mechanism of the battery steel shell of the present invention, as Figure 12As shown, preferably, the upper die 2 includes a mounting shaft 21, a wire tying end block 22, and a wire tying pin 23. The mounting shaft 21 is mounted at the lower end of the rotating shaft assembly 1 through a first bearing 201. The lower end of the mounting shaft 21 is a stepped shaft end 211. The wire tying end block 22 is a cup-shaped structure with one end open and hollow inside. A first through hole 221 is formed in the bottom of the cup of the wire tying end block 22. The diameter of the first through hole 221 is the same as the diameter of the end of the stepped shaft end 211 of the mounting shaft 21. The first through hole 221 of the wire tying end block 22 passes through and sleeves on the end of the stepped shaft end 211 of the mounting shaft 21. The open end of the wire tying end block 22 faces away from the mounting shaft 21. The wire tying pin 23 is a columnar structure, and the outer diameter of the wire tying pin 23 is the same as the inner diameter of the wire tying end block 22. First chambers 231 and second chambers 232 are respectively provided at both ends of the wire tying pin 23 along its axial direction. The first chambers 231 and the second chambers 232 are axially communicated by a second through hole 233. The inner diameter of the first chambers 231 is the same as the diameter of the end of the stepped shaft end 211 of the mounting shaft 21. The wire tying pin 23 is sleeved outside the end of the stepped shaft end 211 of the mounting shaft 21 and inside the wire tying end block 22. The end of the stepped shaft end 211 of the mounting shaft 21 is located in the first chambers 231 of the wire tying pin 23. A bolt 24 passes through the second through hole 233 of the wire tying pin 23 and is locked to the end of the stepped shaft end 211 of the mounting shaft 21. The nut 241 of the bolt 24 is located in the second chambers 232 of the wire tying pin 23 and does not protrude above the end face of the second chambers 232. The step surface 2111 of the stepped shaft end 211 of the mounting shaft 21, the wire tying end block 22, and the wire tying pin 23 are sequentially fixed. During operation, the open end of the battery steel shell is sleeved outside the end side of the second chambers 232 of the wire tying pin 23, and the end face of the open end of the battery steel shell abuts against the open end face of the wire tying end block 22.

[0063] In the wire tying mechanism for the battery steel shell of the present invention, the open end of the battery steel shell placed on the lower die is sleeved outside the end side of the second chambers 232 of the wire tying pin 23 to realize the radial positioning of the battery steel shell; the end face of the open end of the battery steel shell abuts against the open end face of the wire tying end block 22, and the upper die and the lower die together perform axial positioning on the battery steel shell. The upper die 2 of the present invention is composed of a mounting shaft 21, a wire tying end block 22, and a wire tying pin 23. During the wire tying process of the battery steel shell, the easily worn wire tying end block 22 and wire tying pin 23 form a split structure with the mounting shaft 21. After the wire tying end block 22 and the wire tying pin 23 are worn, only the wire tying end block 22 and the wire tying pin 23 need to be replaced separately, without replacing the entire upper die. On the one hand, it greatly saves production costs and reduces material waste; on the other hand, it avoids the disassembly and assembly of the bearing during the replacement of the entire upper die. When replacing the wire tying end block 22 and the wire tying pin 23, only the bolt 24 needs to be disassembled, and the disassembly and replacement operation is more convenient.

[0064] For the wire-tying mechanism of the battery steel shell of the present invention, preferably, the first chamber 231 and the second chamber 232 of the wire-tying pin 23 are symmetrically arranged along the axial direction of the wire-tying pin 23. With the symmetric arrangement of the first chamber 231 and the second chamber 232, when the outer wall on the side of the second chamber 232 of the wire-tying pin 23 is worn, it can be used after turning it around, which can extend the service life of the wire-tying pin 23 and reduce the production cost.

[0065] For the wire-tying mechanism of the battery steel shell of the present invention, preferably, an adjusting piece 25 is pressed between the step surface 2111 of the stepped shaft end 211 of the mounting shaft 21 and the wire-tying end block 22. The use of the adjusting piece 25 can adjust the mounting height of the wire-tying end block 22 and the wire-tying pin 23, which is convenient for the installation and positioning of the wire-tying end block 22 and the wire-tying pin 23.

[0066] For those of ordinary skill in the technical field to which the present invention pertains, without departing from the concept of the present invention, several simple deductions or substitutions can also be made, which should all be regarded as falling within the protection scope of the present invention.

Claims

1. A wire-tying mechanism for a battery steel shell, comprising a turntable, a rotating shaft assembly with a hollow chamber, an upper die, a wire-tying wheel assembly, a sliding rod, a bearing sleeve, and a cam mechanism installed above the turntable. The rotating shaft assembly vertically penetrates and is rotatably installed on the turntable. The upper die is installed at the lower end of the rotating shaft assembly through a first bearing. The two wire-tying wheel assemblies are located on both sides of the upper die. Each wire-tying wheel assembly includes a swing arm and a wire-tying wheel. The middle of the swing arm is hinged to the lower end of the rotating shaft assembly. The upper end of the swing arm is located in the chamber of the rotating shaft assembly. The wire-tying wheel is installed at the lower end of the swing arm. The hinge axes of the middle parts of the swing arms of the two wire-tying wheel assemblies are horizontally parallel to the lower end of the rotating shaft assembly. The sliding rod is coaxially and vertically slidably installed in the hollow chamber of the rotating shaft assembly. The lower end of the sliding rod is a frustum structure with a gradually narrowing width from top to bottom. The lower end of the sliding rod is located between the upper ends of the two swing arms of the wire-tying wheel assembly. More than two groups of reset spring mechanisms that respectively push against the upper ends of the two swing arms are also installed on the side wall of the rotating shaft assembly. It is characterized in that: The upper end of the sliding rod is provided with a wire tying depth fine-tuning mechanism. The wire tying depth fine-tuning mechanism includes a first adjusting sleeve, a second adjusting sleeve and an equalizing sleeve. The first adjusting sleeve has internal threads and is sleeved on the sliding rod and threadedly connected to the upper end of the sliding rod with external threads. The first adjusting sleeve is installed in a bearing sleeve that is horizontally limited by a cam mechanism through a second bearing. The upper end of the first adjusting sleeve protrudes above the bearing sleeve. The upper end part of the first adjusting sleeve that protrudes above the bearing sleeve extends radially outward with a limiting part. The limiting part of the first adjusting sleeve and the second adjusting sleeve are both hollow and have a regular polygon cross-section. The limiting part of the first adjusting sleeve and the second adjusting sleeve have the same number of sides and the same circumradius. The second adjusting sleeve is located above the first adjusting sleeve and is fixedly sleeved on the sliding rod. The inner hole surface cross-section of the equalizing sleeve is a uniformly regular triangular waveform. The groove angle of the inner hole surface of the equalizing sleeve's triangular waveform is equal to the inner angle of the regular polygon structure of the limiting part of the first adjusting sleeve. The circumradius of the inner hole surface of the equalizing sleeve's triangular waveform is the same as the circumradius of the regular polygon structure of the limiting part of the first adjusting sleeve. The number of groove angles on the inner hole surface of the equalizing sleeve is an integer multiple of the number of sides of the regular polygon structure of the limiting part of the first adjusting sleeve. The equalizing sleeve is sleeved outside the limiting part of the first adjusting sleeve and the second adjusting sleeve; The upper die includes a mounting shaft, a wire tying end block and a wire tying pin. The mounting shaft is installed at the lower end of the rotating shaft assembly through a first bearing. The lower end of the mounting shaft is a stepped shaft end. The wire tying end block is a cup-shaped structure. One end of the wire tying end block is open and hollow inside. A first through hole is opened on the bottom of the cup of the wire tying end block. The diameter of the first through hole is the same as the diameter of the end of the stepped shaft of the mounting shaft. The first through hole of the wire tying end block passes through and is sleeved on the end of the stepped shaft of the mounting shaft. The open end of the wire tying end block faces away from the mounting shaft. The wire tying pin is a columnar structure. The outer diameter of the wire tying pin is the same as the inner diameter of the wire tying end block. First chambers and second chambers are respectively arranged at both ends of the wire tying pin along its axial direction. The first chamber and the second chamber are axially penetrated by a second through hole. The inner diameter of the first chamber is the same as the diameter of the end of the stepped shaft of the mounting shaft. The wire tying pin is sleeved outside the end of the stepped shaft of the mounting shaft and inside the wire tying end block. The end of the stepped shaft of the mounting shaft is located in the first chamber of the wire tying pin. A bolt passes through the second through hole of the wire tying pin and is locked to the end of the stepped shaft of the mounting shaft. The nut of the bolt is located in the second chamber of the wire tying pin and does not protrude above the end face of the second chamber. The stepped surface of the stepped shaft of the mounting shaft, the wire tying end block and the wire tying pin are sequentially abutted. During operation, the open end of the battery steel shell is sleeved outside the end side of the second chamber of the wire tying pin, and the end face of the open end of the battery steel shell abuts against the open end face of the wire tying end block.

2. The wire tying mechanism for the battery steel shell according to claim 1, wherein: The cross-section of the limiting part of the first adjusting sleeve is a hollow regular hexagon.

3. The wire-tying mechanism for the battery steel shell according to claim 1, characterized in that: The number of groove angles on the inner hole surface of the equalizing sleeve is 3 to 5 times the number of sides of the regular polygon structure of the limiting part of the first adjusting sleeve.

4. The wire-tying mechanism for the battery steel shell according to claim 1, characterized in that: The number of groove angles on the inner hole surface of the equalizing sleeve is 24.

5. The wire tying mechanism for the battery steel shell according to claim 1, characterized in that: A threaded through hole is opened on the equalizing sleeve, and a locking screw is inserted into the threaded through hole. The locking screw transversely abuts the first adjusting sleeve.

6. The wire-tying mechanism for the battery steel shell according to claim 1, characterized in that: The second adjusting sleeve is fixed to the sliding rod through a set screw.

7. The wire-tying mechanism for the battery steel shell according to claim 1, characterized in that: A first gasket sleeved on the sliding rod is installed between the limiting part of the first adjusting sleeve and the bearing sleeve.

8. The wire tying mechanism for the battery steel shell according to claim 1, characterized in that: A roller is installed at the upper end of each swing arm in each wire tying wheel assembly, and the lower end of the slide rod is located between the two rollers at the upper ends of the two swing arms.

9. The wire-tying mechanism for the battery steel shell according to claim 1, characterized in that: The first chamber and the second chamber of the wire tying pin are symmetrically arranged in the axial direction of the wire tying pin.

Images