Terminal crimping machine with switchable tool bit

Abstract

The utility model relates to a terminal crimping machine with switchable tool bits, which is characterized in that a plurality of first tool bits are distributed on a first tool changing disc along the rotating circumferential direction of the first tool changing disc, and a plurality of second tool bits are distributed on a second tool changing disc along the rotating circumferential direction of the second tool changing disc; the first tool bit assembly and the second tool bit assembly are arranged on the machine frame, different first tool bits and second tool bits are switched through rotation of the first tool changing disc and the second tool changing disc so as to be matched to carry out terminal crimping, and the first tool bit assembly is connected to the machine frame in a sliding mode. The first adjusting mechanism and the second adjusting mechanism independently drive and are connected to the first tool bit assembly so as to roughly and finely adjust the first tool changing disc of the first tool bit assembly to slide to be close to or away from the second tool changing disc. By arranging the first adjusting mechanism and the second adjusting mechanism, the crimping height of the first tool bit can be flexibly and accurately adjusted according to different types of the first tool bit and the second tool bit.

Description

Technical Field

[0001] This utility model relates to a terminal crimping machine, specifically a terminal crimping machine with interchangeable blades. Background Technology

[0002] Terminal crimping machines are used to automatically or semi-automatically crimp terminals onto the ends of wire harnesses. Currently, there are numerous specifications for terminals and wire harnesses. If the upper and lower cutting heads (or upper and lower die) of the terminal crimping machine were disassembled and replaced every time a new terminal specification was needed, the production process would be cumbersome and inefficient. Therefore, existing technologies use a rotary table as a tool magazine, switching between different cutting heads by rotating the table. However, different cutting heads require different crimping heights. If the crimping height cannot be flexibly and accurately adjusted according to different cutting heads, production quality will be affected. Utility Model Content

[0003] To address the aforementioned problems, this utility model proposes a terminal crimping machine with a more optimized structure and switchable cutting head.

[0004] This utility model is achieved using the following technical solution:

[0005] This utility model proposes a terminal crimping machine with switchable cutter heads, including a frame, a first cutter head assembly and a second cutter changing disc mounted on the frame. The first cutter head assembly includes a first cutter changing disc, which is positioned opposite to the second cutter changing disc and is driven to rotate by different driving devices. Multiple first cutters are distributed on the first cutter changing disc along its rotational circumference, and multiple second cutters are distributed on the second cutter changing disc along its rotational circumference. The rotation of the first and second cutter changing discs allows for switching between different first and second cutters to perform terminal crimping. The machine also includes a first adjustment mechanism and a second adjustment mechanism. The first cutter head assembly is slidably connected to the frame. The first and second adjustment mechanisms are each independently driven and connected to the first cutter head assembly to coarsely and finely adjust the sliding of the first cutter changing disc of the first cutter head assembly toward or away from the second cutter changing disc.

[0006] Preferably, the first cutter head assembly includes a first slider and a second slider, both of which are slidably connected to the frame. The first adjustment mechanism includes a first driving device, which drives the first slider to slide and simultaneously links the sliding of the second slider. The second adjustment mechanism includes a second driving device, which drives the second slider to slide relative to the first slider. The first cutter changer is linked to the second slider.

[0007] Preferably, the sliding direction of the first cutter head assembly relative to the frame is taken as the vertical direction, and the direction perpendicular to the vertical direction is taken as the horizontal direction. The first tool changer is positioned above the second tool changer, and the second tool changer is positioned below the first tool changer. The first cutter head assembly also includes a connecting seat, and the second adjustment mechanism also includes an inclined guide block. The connecting seat and the second slider are fixedly connected. The upper and lower ends of the inclined guide block abut against the connecting seat, respectively. The inclined guide block and the first slider are slidably connected in a direction inclined to the vertical direction. The inclined guide block has a movable gap in the horizontal direction. The first tool changer is mounted on the second slider and / or the connecting seat. The first driving device is drivenly connected to the first slider, and the second driving device is drivenly connected to the inclined guide block and drives the inclined guide block in the horizontal direction.

[0008] Preferably, the inclined guide block is provided with a rack arranged in the horizontal direction, and the second driving device includes a gear that meshes with the rack; a pressure sensor is also provided between the inclined guide block and the connecting seat.

[0009] Preferably, the device further includes a first pressing part, which applies force in the horizontal direction to the inclined guide block to keep the inclined guide block and the first slider in close contact.

[0010] Preferably, the device further includes a feeding gripper for gripping terminals. The feeding gripper is disposed on one side of the second tool changer axially and has a travel stroke for entering or exiting between the first and second tool changers.

[0011] Preferably, the feeding gripper has two sets, namely a first feeding gripper and a second feeding gripper, which are arranged one above the other. The first feeding gripper has a linear motion stroke. A guide rail is provided on the frame that is slidably connected to the second feeding gripper. In the direction from the second feeding gripper forward into the space between the first and second tool changers, the guide rail includes a first straight segment, a first broken line segment, a second straight segment, a second broken line segment, and a third straight segment connected in sequence. The first broken line segment extends inclined from top to bottom, and the second broken line segment extends inclined from bottom to top. The second feeding gripper includes a floating support, which is slidably connected to the guide rail via rollers.

[0012] Preferably, the device further includes a waste baffle, which is telescopically arranged on one side of the travel stroke of the feed gripper and is configured to extend toward the feed gripper to remove waste remaining on the feed gripper.

[0013] Preferably, the feed gripper includes a chuck configured to float, and also includes a second clamping part capable of applying downward force to the chuck to press it against the second cutter head.

[0014] Preferably, a wire harness pressure rod is provided on one side of the first tool changer axial direction to press against the wire harness transfer mechanism, thereby preventing the wire harness from arching. The height of the wire harness pressure rod is adjustable.

[0015] The present invention has the following beneficial effects: By setting a first adjustment mechanism and a second adjustment mechanism, the present invention can flexibly and accurately adjust the pressing height of the first cutter head according to different types of first and second cutter heads. Due to the combination of coarse and fine adjustment mechanisms, the pressing height adjustment speed of the first cutter head can be guaranteed while ensuring its accuracy, so as to better match the multi-cutter head design in this embodiment. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of a terminal crimping machine with switchable blades in the embodiment;

[0017] Figure 2 This is a schematic diagram (angle one) showing the first cutter head assembly and the second adjustment mechanism separated from the frame in the embodiment;

[0018] Figure 3 This is a schematic diagram (angle two) showing the first cutter head assembly and the second adjustment mechanism separated from the frame in the embodiment;

[0019] Figure 4 This is a schematic diagram showing the separation of the first slider and the inclined guide block of the first cutter head assembly in the embodiment;

[0020] Figure 5 This is a schematic diagram showing the second adjustment mechanism and the inclined guide block being connected by a gear and rack drive in the embodiment;

[0021] Figure 6 This is a three-dimensional schematic diagram of the first and second feed grippers in the embodiment;

[0022] Figure 7 This is a front view of the first and second feed grippers in the embodiment;

[0023] Figure 8 This is a schematic diagram of the second clamping part and the first feeding gripper in the embodiment;

[0024] Figure 9 This is a schematic diagram of a terminal crimping machine with switchable cutter heads, as shown in the embodiment, equipped with a waste material stop bar. Detailed Implementation

[0025] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention and are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0026] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0027] See Figure 1 As shown in the preferred embodiment of this utility model, a terminal crimping machine with switchable blades is provided for crimping terminals and wire harnesses. The terminal crimping machine includes a frame 3, a first blade assembly 1 and a second blade changing disc 20 mounted on the frame 3. The first blade assembly 1 includes a first blade changing disc 10. The first blade changing disc 10 and the second blade changing disc 20 are arranged opposite to each other and are driven to rotate by different driving devices (such as motors). A plurality of first blades 11 are distributed on the first blade changing disc 10 along its rotational circumference, and a plurality of second blades 21 are distributed on the second blade changing disc 20 along its rotational circumference. Different first blades 11 and second blades 21 are switched by rotating the first blade changing disc 10 and the second blade changing disc 20 to cooperate in crimping the terminals. Each first cutter head 11 has a different specification, and each second cutter head 21 has a different specification. Since the first cutter changer 10 and the second cutter changer 20 rotate independently, any first cutter head 11 can be matched with any second cutter head 21. Therefore, different first cutter heads 11 and second cutter heads 21 can be flexibly selected according to the type of terminal and wire harness. When crimping the terminal, the terminal and wire harness are introduced between the first cutter head 11 and the second cutter head 21. The first cutter head 11 and the second cutter head 21 are relatively close to each other to crimp the terminal onto the wire harness. The drive device that drives the first tool changer 10 and the second tool changer 20 to rotate can be configured to be self-locking, such as a motor with a self-locking function. The motor achieves self-locking after rotating a certain angle to prevent the first tool changer 10 and the second tool changer 20 from rotating during the crimping operation. Furthermore, this embodiment also provides a tool changer positioning structure. Taking the second tool changer 20 as an example, a positioning hole 22 is provided on the second tool changer 20 corresponding to each second cutter head 21. A telescopic pin (not shown in the figure) is provided on the frame 3. When a second cutter head 21 rotates to the working position, the telescopic pin is inserted into the positioning hole 22 to position the second tool changer 20. The telescopic pin can be telescopically controlled by an existing drive device such as a cylinder. The same tool changer positioning structure is also applied to the first tool changer 10.

[0028] During crimping, the first cutter head 11 and the second cutter head 21 need to be relatively close; in other words, the first tool changer 10 and the second tool changer 20 need to be relatively close. In this embodiment, the second tool changer 20 is configured with a fixed axis, while the first tool changer 10 is configured with a movable axis. For ease of description, this embodiment assumes that the first tool changer 10 is positioned above the second tool changer 20, and the second tool changer 20 is positioned below the first tool changer 10, with the direction perpendicular to the vertical direction defined as the horizontal direction. Figure 2-5As shown, a slide rail 31 extending from top to bottom is provided on the frame 3. The first cutter head assembly 1 includes a first slider 12 and a second slider 13. Both the first slider 12 and the second slider 13 are slidably connected to the slide rail 31. In this embodiment, the first slider 12 and the second slider 13 are on the same straight line and disconnected from each other. In other embodiments, the first slider 12 and the second slider 13 may not be on the same straight line, but in this case, the slide rail 31 will also be divided into two disconnected slide rails, making the structure more complex. The first cutter head assembly 1 also includes a connecting seat 14. The connecting seat 14 and the second slider 13 are fixedly connected. An inclined guide block 15 is movably fitted into the connecting seat 14. The upper and lower ends of the inclined guide block 15 abut against the connecting seat 14, respectively. There is a movable gap between the two ends of the inclined guide block 15 in the horizontal direction and the connecting seat 14. The inclined guide block 15 and the first slider 12 are slidably connected in a direction inclined to the vertical direction. More specifically, the inclined guide block 15 has an inclined groove 151 extending from top to bottom, and the first slider 12 has an inclined protrusion 122 extending from top to bottom. The inclined protrusion 122 is slidably inserted into the inclined groove 151. In other embodiments, the protrusion can be provided on the inclined guide block 15, and the inclined groove can be provided on the first slider 12. The inclined groove 151 and the inclined protrusion 122 can more preferably be engaged by a dovetail joint and a dovetail tenon, making them less likely to separate. The connecting seat 14 is also provided with a first pressing part 16. The first pressing part 16 applies force to the inclined guide block 15 in the horizontal direction to keep the inclined guide block 15 and the first slider 12 in close contact. In this embodiment, the first pressing part 16 is a cylinder in which the output rod can be compressed. In other embodiments, the first pressing part 16 can also be implemented by an elastic element such as a spring. A first drive device 4 and a second drive device 5 are respectively installed on the frame 3 and the connecting seat 14. Both the first drive device 4 and the second drive device 5 can be implemented by motors, rotary cylinders, etc. The output end of the first drive device 4 is provided with an eccentric plug 41. The first slider 12 is provided with a slot 121 that is inserted into the eccentric plug 41. Since the first slider 12 is limited in the slide rail 31, when the eccentric plug 41 of the first drive device 4 rotates, the first slider 12 is also driven to slide downward or upward. When the first slider 12 slides, it pushes the inclined guide block 15, and the inclined guide block 15 further pushes the connecting seat 14 and the second slider 13, so that the first slider 12 and the second slider 13 slide simultaneously in the slide rail 31. The first tool changer 10 is installed on the second slider 13 (or it can be installed on the connecting seat 14), thereby forming a first adjustment mechanism for adjusting the height of the first tool changer 10 of the first tool head assembly 1. According to the operation of the first drive device 4, the distance of the first tool changer 10 sliding closer to or further away from the second tool changer 20 can be quickly and coarsely adjusted. The first drive device 4 can be a drive device with a self-locking function, so that once the first drive device 4 stops, the position of the first slider 12 is locked.Besides using the eccentric insert 41, the first driving device 4 can also use other driving forms. For example, the first driving device 4 can use a linear driving mechanism to drive the first slider 12, as long as it can allow the first slider 12 to slide up and down. The inclined guide block 15 is fixedly provided with a rack 152 arranged in the horizontal direction. The second driving device 5 includes a gear 51 that meshes with the rack 152. When the second driving device 5 is running, it drives the inclined guide block 15 in the horizontal direction. However, under the inclined guiding action of the first slider 12, the inclined guide block 15 moves obliquely upward or downward, thereby pushing the connecting seat 14 and the second slider 13 to slide, thus forming a second adjustment mechanism for adjusting the height of the first tool changing disc 10 of the first tool head assembly 1. The second adjustment mechanism converts the horizontal drive of the second drive device 5 into vertical movement through the oblique guide block 15 and the oblique guide cooperation of the first slider 12. Therefore, its range / amplitude of movement is smaller and its movement is slower than that of the first adjustment mechanism. This allows for fine-tuning of the distance by which the first tool changer 10 slides closer to or further away from the second tool changer 20. Furthermore, a reduction gear train can be installed within the second drive device 5 and connected to the gear 51, making the height adjustment of the second drive device 5 even more precise. In other embodiments, other linear transmission mechanisms can be used instead of the rack 152 and the gear 51.

[0029] By setting the first adjustment mechanism and the second adjustment mechanism described above, the terminal crimping machine of this embodiment can flexibly and accurately adjust the crimping height of the first cutter head 11 according to different types of first cutter head 11 and second cutter head 21. Due to the combination of coarse adjustment and fine adjustment mechanisms, the crimping height adjustment speed of the first cutter head 11 can be guaranteed while ensuring its accuracy, so as to better match the multi-cutter head design of this embodiment.

[0030] It is understandable that the second tool changer 20 may also be equipped with a similar first adjustment mechanism and a second adjustment mechanism to enhance the flexibility of adjusting the working distance between the first tool head 11 and the second tool head 21.

[0031] A pressure sensor (not shown in the figure) is also provided between the inclined guide block 15 and the connecting seat 14, so that the downward pressure of the first cutter head 11 can be detected intuitively and quickly. And, as... Figure 3 An overtravel sensor 17 is also provided on the connecting seat 14 to detect whether the movement of the inclined guide block 15 relative to the connecting seat 14 exceeds the travel limit. The overtravel sensor 17 can be implemented by various proximity sensors, such as a cut-off photoelectric sensor.

[0032] like Figure 1The terminal crimping machine also includes a feeding gripper 6, which is used to grip the terminal material between the first tool changer 10 and the second tool changer 20 for terminal crimping. In this embodiment, the feeding gripper 6 is located on one side of the second tool changer 20 along its axial direction, and the feeding gripper 6 has a travel stroke to enter or exit between the first tool changer 10 and the second tool changer 20. In this embodiment, as... Figure 6 and Figure 7 The feed grippers 6 are provided in two sets, namely the first feed gripper 61 and the second feed gripper 62. The first feed gripper 61 and the second feed gripper 62 are arranged one above the other. The movement stroke of the first feed gripper 61 is a linear movement stroke. A guide rail is provided on the frame 3 that is slidably connected to the second feed gripper 62. In the direction from the second feed gripper 62 forward into the space between the first tool changer 10 and the second tool changer 20, the guide rail includes a first straight segment 601, a first broken line segment 602, a second straight segment 603, a second broken line segment 604, and a third straight segment 604 connected in sequence. The first broken line segment 602 is inclined from top to bottom. Extending upwards, the second zigzag segment 604 extends obliquely from bottom to top. The second feeding gripper 62 includes a floating support 622. The body of the second feeding gripper 62 and the floating support 622 are slidably connected in the vertical direction. The floating support 622 is slidably connected to the guide rail via rollers 621. Thus, guided by the guide rail, the second feeding gripper 62 can rise to the same height as the first feeding gripper 61 at both ends for picking up and pressing materials. The second feeding gripper 62 descends in the middle for horizontal conveying. Therefore, in this embodiment, the first feeding gripper 61 and the second feeding gripper 62 can feed the terminals alternately, improving work efficiency.

[0033] like Figure 8 The first feed gripper 61 includes a chuck 66, which is configured to be floating. In this embodiment, the chuck 66 can slide in the vertical direction and is slidably reset by a spring 69 acting on it. A second clamping part 7 is fixedly disposed above the first feed gripper 61. The second clamping part 7 can apply downward force to the chuck 66 to press it against the second cutter head 21. The same design can be applied to the second feed gripper 62. The second clamping part 7 can be a driving device such as a cylinder, or it can be an elastic pressing part that can move elastically in the vertical direction. This arrangement ensures that the terminal can make close contact with the second cutter head 21.

[0034] like Figure 9 On one side of the movement stroke of the feed gripper 6, there is also a waste baffle 8. The waste baffle 8 is driven by a drive device such as a cylinder to extend and retract. When the waste baffle 8 retracts, it will not block the feed gripper 6. When the waste baffle 8 extends toward the feed gripper 6, it can remove the terminal waste remaining on the feed gripper 6 by blocking it.

[0035] like Figure 1 A wire harness pressure bar 9 is provided on one side of the first tool changer 10 along its axial direction. When the wire harness is transferred between the first tool changer 10 and the second tool changer 20 by a wire harness transfer mechanism (such as a gripper commonly used in the prior art), it tends to arch. By providing the wire harness pressure bar 9, the downward movement of the first tool changer 10 can press the wire harness transfer mechanism against it, thereby preventing the wire harness from arching. The wire harness transfer mechanism can be configured to be floating, similar to the chuck 66. Furthermore, the height of the wire harness pressure bar 9 can be adjusted to match different working conditions, such as through a threaded connection.

[0036] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that any changes in form and detail made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims fall within the protection scope of the present invention.

Claims

1. A terminal crimping machine with switchable tool heads, characterized by: The first tool head assembly includes a first tool head disc, and the first tool head disc and the second tool head disc are oppositely arranged and driven to rotate by different driving devices, a plurality of first tool heads are distributed along the circumferential direction of the first tool head disc, and a plurality of second tool heads are distributed along the circumferential direction of the second tool head disc. Different first tool heads and second tool heads are switched by the rotation of the first tool head disc and the second tool head disc to cooperate to crimp terminals. The first adjusting mechanism and the second adjusting mechanism are each independently drivingly connected to the first tool head assembly to respectively coarsely adjust and finely adjust the first tool head disc of the first tool head assembly to slide close to or away from the second tool head disc.

2. The knife head switchable terminal crimping machine according to claim 1, characterized in that: The first tool head assembly includes a first slider and a second slider, both of which are slidingly connected to the rack. The first adjusting mechanism includes a first driving device for driving the first slider to slide and simultaneously driving the second slider to slide. The second adjusting mechanism includes a second driving device for driving the second slider to slide relative to the first slider. The first tool head disc is connected to the second slider.

3. The knife head switchable terminal crimping machine according to claim 2, characterized in that: The first tool head assembly includes a first slider and a second slider, both of which are slidingly connected to the rack. The first adjusting mechanism includes a first driving device for driving the first slider to slide and simultaneously driving the second slider to slide. The second adjusting mechanism includes a second driving device for driving the second slider to slide relative to the first slider. The first tool head disc is connected to the second slider.

4. The knife head switchable terminal crimping machine according to claim 3, characterized in that: The first tool head assembly includes a first slider and a second slider, both of which are slidingly connected to the rack. The first adjusting mechanism includes a first driving device for driving the first slider to slide and simultaneously driving the second slider to slide. The second adjusting mechanism includes a second driving device for driving the second slider to slide relative to the first slider. The first tool head disc is connected to the second slider.

5. The knife head switchable terminal crimping machine according to claim 3, characterized by: The first tool head assembly includes a first slider and a second slider, both of which are slidingly connected to the rack. The first adjusting mechanism includes a first driving device for driving the first slider to slide and simultaneously driving the second slider to slide. The second adjusting mechanism includes a second driving device for driving the second slider to slide relative to the first slider. The first tool head disc is connected to the second slider.

6. The knife head switchable terminal crimping machine according to claim 1, characterized by: The first tool head assembly includes a first slider and a second slider, both of which are slidingly connected to the rack. The first adjusting mechanism includes a first driving device for driving the first slider to slide and simultaneously driving the second slider to slide. The second adjusting mechanism includes a second driving device for driving the second slider to slide relative to the first slider. The first tool head disc is connected to the second slider. The first tool head assembly includes a first slider and a second slider, both of which are slidingly connected to the rack. The first adjusting mechanism includes a first driving device for driving the first slider to slide and simultaneously driving the second slider to slide. The second adjusting mechanism includes a second driving device for driving the second slider to slide relative to the first slider. The first tool head disc is connected to the second slider. The first tool head assembly includes a first slider and a second slider, both of which are slidingly connected to the rack. The first adjusting mechanism includes a first driving device for driving the first slider to slide and simultaneously driving the second slider to slide. The second adjusting mechanism includes a second driving device for driving the second slider to slide relative to the first slider. The first tool head disc is connected to the second slider.

7. The knife head switchable terminal crimping machine according to claim 6, characterized in that: The feeding clamping jaw is provided with two groups, namely a first feeding clamping jaw and a second feeding clamping jaw, which are arranged one above another, the movement stroke of the first feeding clamping jaw is linear movement stroke, a guide slide rail in sliding connection with the second feeding clamping jaw is arranged on the rack, from the second feeding clamping jaw to the direction of entering between the first tool changing disc and the second tool changing disc, the guide slide rail comprises a first linear segment, a first fold line segment, a second linear segment, a second fold line segment and a third linear segment which are sequentially connected, wherein the first fold line segment extends obliquely from top to bottom, and the second fold line segment extends obliquely from bottom to top, the second feeding clamping jaw comprises a floating support, and the floating support is in sliding connection with the guide slide rail through a roller.

8. The knife head switchable terminal crimping machine according to claim 6, characterized in that: The device further comprises a waste blocking lever which is arranged on one side of the movement stroke of the feeding clamping jaw in an extendable manner, and the waste blocking lever is configured to extend to the feeding clamping jaw to sweep off the terminal waste remaining on the feeding clamping jaw when the feeding clamping jaw exits between the first tool changing disc and the second tool changing disc.

9. The knife head switchable terminal crimping machine according to claim 6, characterized in that: The feeding clamping jaw comprises a chuck which is configured to be floating, and further comprises a second pressing part which can apply a downward force to the chuck so that the terminals on the chuck are pressed on the second tool head.

10. The knife head switchable terminal crimping machine according to claim 1, characterized in that: A wire harness pressing lever is arranged on one side of the first tool changing disc in the axial direction, and is used for pressing the wire harness transfer mechanism, so as to prevent the wire harness from being arched, and the height of the wire harness pressing lever is adjustable.

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