A wire harness opening and unwinding device and a control method

Abstract

The present invention relates to the technical field of automotive wire harnesses. Specifically, it relates to a wire harness opening and unwinding device and a control method. The wire harness opening and unwinding device includes a frame unit, a wire threading unit, and a plurality of protection units. A unwinding station provided on the frame unit is used to place a bobbin. The wire threading unit is located above the unwinding station. The wire harness unwound from the bobbin passes upward through the wire threading unit. The plurality of protection units are distributed around the unwinding station. The protection unit includes a mounting post and bristles, and the bristles cover the outer peripheral surface of the mounting post. The positions where the bristles are distributed include a first area and a second area. The bristles in the first area are perpendicular to the axis of the mounting post, and the angle between the bristles in the second area and the axis of the mounting post is an acute angle. The vertical middle height of the first area is higher than the vertical middle height of the second area. The control method is applied to the wire harness opening and unwinding device. In this way, the problem that the wire harness is prone to flapping and hitting the surrounding equipment structure during opening and unwinding is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive wire harnesses, and more specifically, to a wire harness unwinding and pay-off device and a control method therefor. Background Art

[0002] During the process of unwinding a wire harness in an automotive wire harness, a pay-off device is required to convey the wire harness to the wire cutting equipment. During the pay-off process of the wire harness, due to high-speed rotation or tension changes, the wire harness is prone to the phenomenon of swinging outwards, resulting in collisions between the wire harness and surrounding equipment or structures. This not only may damage the surface of the wire harness, but also affect production stability and the service life of the equipment. Traditional buffering methods usually use fixed baffles for blocking. However, since the baffle is a rigid structure, it cannot effectively absorb the impact force of the wire harness swing, and is prone to cause wear on the surface of the wire harness. In addition, the swing amplitude and impact force of the wire harness at different pay-off positions are different, and the fixed baffle cannot adapt to this dynamic change, resulting in uneven buffering effects. After long-term use, it may also be deformed or damaged due to frequent local impacts.

[0003] To solve the above problems, the prior art urgently needs a solution that can flexibly buffer the swing of the wire harness, which can not only effectively absorb the impact force, but also adapt to the dynamic changes at different pay-off positions, thereby reducing wire harness wear and increasing the service life of the equipment. Summary of the Invention

[0004] To solve the problem that the wire harness is prone to swing and impact the surrounding equipment structure during the unwinding and pay-off process, the present invention provides a wire harness unwinding and pay-off device and a control method therefor.

[0005] In a first aspect, the present invention provides a wire harness unwinding and pay-off device, which includes:

[0006] A frame unit, on which a pay-off station is provided for placing a bobbin;

[0007] A threading unit located above the pay-off station; when the bobbin is placed at the pay-off station, the wire harness unwound from the bobbin passes upwards through the threading unit;

[0008] A plurality of protection units distributed around the pay-off station; each protection unit includes a mounting post and bristles; the bristles cover the outer peripheral surface of the mounting post; one end of the bristles is connected to the mounting post; the positions where the bristles are distributed include a first area and a second area; the bristles in the first area are perpendicular to the axis of the mounting post; the angle between the bristles in the second area and the axis of the mounting post is an acute angle, and the middle height in the vertical direction of the first area is higher than the middle height in the vertical direction of the second area.

[0009] In some embodiments, the position where the bristles are distributed further includes a third region; the bristles in the third region are perpendicular to the axis of the mounting post; the third region is at the same height as the first region; the mounting post is rotatably connected to the frame unit; the distribution density of the bristles in the third region is greater than or equal to the distribution density of the bristles in the first region.

[0010] In some embodiments, the position where the bristles are distributed further includes a fourth region; the angle between the bristles in the fourth region and the axis of the mounting post is an acute angle; the fourth region is at the same height as the second region; the distribution density of the bristles in the fourth region is greater than or equal to the distribution density of the bristles in the second region.

[0011] In some embodiments, the second region is directly below the first region; the fourth region is directly below the third region.

[0012] In some embodiments, the end of the bristles in the second region that is away from the mounting post extends obliquely upward; the end of the bristles in the fourth region that is away from the mounting post extends obliquely upward.

[0013] In some embodiments, the diameter of the mounting post gradually decreases in the vertically downward direction.

[0014] In a second aspect, the present invention provides a method for controlling the unwinding and dispensing of a wire harness. The method for controlling the unwinding and dispensing of the wire harness is applied to the wire harness unwinding and dispensing device in the first aspect. The control method of the wire harness unwinding and dispensing device includes:

[0015] Step S10, based on the fact that the wire harness unwinding and dispensing device is in a working state, obtain the state of the unwinding station; the unwinding station includes a standby state and an unwinding state; in the standby state, the unwinding station is in an empty state; in the unwinding state, there is a bobbin at the unwinding station.

[0016] Step S20, based on the fact that the unwinding station is in the unwinding state, accumulate the unwinding duration of the unwinding station.

[0017] Step S30, based on the fact that the unwinding duration is less than a first duration, control the bristles in the first region to be arranged towards the unwinding station; in the state where the unwinding duration is less than the first duration, the wire harness at the top of the bobbin is in an unwinding state.

[0018] Step S40, based on the fact that the unwinding duration is greater than the first duration and less than a second duration, control the bristles in the second region to be towards the unwinding station; the second duration is greater than the first duration; in the state where the unwinding duration is greater than the first duration and less than the second duration, the wire harness at the bottom of the bobbin is in an unwinding state.

[0019] In some embodiments, the position where the bristles are distributed further includes a third region; the bristles in the third region are perpendicular to the axis of the mounting post; the third region is at the same height as the first region; the mounting post is rotatably connected to the frame unit; the distribution density of the bristles in the third region is greater than or equal to the distribution density of the bristles in the first region;

[0020] The control method of the wire harness opening and unwinding device further includes:

[0021] Step S50, based on the unwinding duration being greater than the second duration and less than the third duration, control the bristles in the third region to face the unwinding station; the third duration is greater than the second duration; in the state where the unwinding duration is greater than the second duration and less than the third duration, the wire harness on the inner layer at the top of the bobbin is in the unwinding state.

[0022] In some embodiments, the position where the bristles are distributed further includes a fourth region; the angle between the bristles in the fourth region and the axis of the mounting post is an acute angle; the fourth region is at the same height as the second region; the distribution density of the bristles in the fourth region is greater than or equal to the distribution density of the bristles in the second region;

[0023] The control method of the wire harness opening and unwinding device further includes:

[0024] Step S60, based on the unwinding duration being greater than the third duration and less than the fourth duration, control the bristles in the fourth region to face the unwinding station; the fourth duration is greater than the third duration; in the state where the unwinding duration is greater than the third duration and less than the fourth duration, the wire harness on the inner layer at the bottom of the bobbin is in the unwinding state.

[0025] In some embodiments, the step S40 includes:

[0026] Step S41, based on the unwinding duration being greater than the first duration and less than the second duration, control the bristles in the second region to face the unwinding station; the second duration is greater than the first duration; in the state where the unwinding duration is greater than the first duration and less than the second duration, the wire harness at the bottom of the bobbin is in the unwinding state;

[0027] Step S42, based on the unwinding duration reaching the second duration, reset the unwinding duration to zero and start accumulating again;

[0028] Step S43, repeat the steps S30 to S40 until the number of repetitions reaches the first preset number;

[0029] The step S60 includes:

[0030] Step S61: Based on the unwinding duration being greater than the third duration and less than the fourth duration, control the bristles in the fourth area to face the unwinding station; the fourth duration is greater than the third duration; when the unwinding duration is greater than the first duration and less than the second duration, the wire harness at the outer layer of the bottom end of the bobbin is in the unwinding state; when the unwinding duration is greater than the third duration and less than the fourth duration, the wire harness at the inner layer of the bottom end of the bobbin is in the unwinding state.

[0031] Step S62: Based on the unwinding duration reaching the fourth duration, callback the unwinding duration to the second duration and continue to accumulate.

[0032] Step S43: Repeat steps S50 to S60 until the number of repetitions reaches the second preset number.

[0033] To solve the problem that the wire harness is prone to flapping and hitting the surrounding equipment structure during unwinding, the present invention has the following advantages:

[0034] Adopt a partitioned flexible buffer design. Replace the traditional rigid baffle with a flexible bristle protection unit surrounding the unwinding station to effectively solve the problem of wire harness flapping. Divide the protection unit into upper and lower areas: the upper vertical bristles provide omnidirectional buffering to match the area with less flapping force in the upper half of the bobbin; the lower bristles are designed specifically for the lower half of the wire harness with greater impact force by utilizing the force dispersion characteristics of the inclined angle, achieving gradient absorption of the impact force while enhancing durability. Combined with the axial guiding constraint of the wire threading unit, this solution forms a three-dimensional protection system, which not only avoids damage to the wire harness surface but also significantly extends the equipment life through partitioned adaptation to dynamic impacts, achieving a technical breakthrough from rigid anti-collision to flexible buffering. Description of the Drawings

[0035] Figure 1 Shows a schematic structural diagram of a wire harness unwinding device in an embodiment;

[0036] Figure 2 Shows Figure 1 the structural diagram of the bobbin in

[0037] Figure 3 Shows a schematic flowchart of a wire harness unwinding control method in an embodiment.

[0038] Reference numerals: 10 frame unit; 11 bobbin; 20 wire threading unit; 30 protection unit; 31 mounting post; 32 bristle. Detailed Embodiments

[0039] The present disclosure will now be described with reference to several exemplary embodiments. It should be understood that these embodiments are described only to enable those of ordinary skill in the art to better understand and thus implement the present disclosure, rather than to imply any limitation on the scope of the present disclosure.

[0040] As used herein, the term "comprising" and its variants are to be construed as open-ended terms meaning "including but not limited to". The term "based on" is to be construed as "at least partially based on". The terms "one embodiment" and "an embodiment" are to be construed as "at least one embodiment". The term "another embodiment" is to be construed as "at least one other embodiment". The orientation or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal", etc. are based on the orientation or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit that the indicated devices, elements or components must have a specific orientation, or be constructed and operated in a specific orientation. Also, some of the above terms may be used to represent other meanings in addition to indicating orientation or positional relationships. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present application can be understood according to specific circumstances. In addition, the terms "mounted", "arranged", "provided with", "connected", "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral structure; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, or there may be internal communication between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances. In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, the meaning of "a plurality" is two or more.

[0041] During the rotation of the unwinding of the automotive wiring harness, it is prone to swing outwards and collide with surrounding equipment, which may not only damage the surface of the wiring harness, but also affect production stability and the service life of the equipment. The traditional solution usually uses a fixed baffle for blocking, but as a rigid structure, the baffle cannot effectively absorb the impact force of the wiring harness swing, and the buffering effect is insufficient. Moreover, the swing amplitude and impact force of the wiring harness during the unwinding process will change, and the fixed baffle cannot adapt to this dynamic change, resulting in uneven buffering effect, and the fixed baffle is prone to deformation or damage.

[0042] In order to solve the above problems, a wire harness unwinding device is provided in this embodiment, such as Figure 1 As shown, the wire harness unwinding device comprises a frame unit 10, a threading unit 20 and a plurality of protection units 30. The frame unit 10 is provided with an unwinding station for placing a wire drum 11 on which a wire harness is wound.

[0043] The threading unit 20 is located above the unwinding station, and the threading unit 20 can be in the shape of a hollow cylinder. When the wire drum 11 is placed in the unwinding station, the wire harness unwound by the wire drum 11 can pass through the threading unit 20 upwards, and the threading unit 20 can be coaxially arranged with the wire drum 11. During the unwinding process of the wire harness, the wire harness is unwound from one axial end of the wire drum 11. A preferred embodiment is that the wire drum 11 is placed vertically, and one end of the wire harness is unwound from the top of the wire drum 11 through the threading unit 20. The restriction of the wire harness lead-out position by the threading unit 20 can limit the radial swinging of the wire harness detached from the wire drum 11 to a certain extent. As the wire harness is unwound from top to bottom, the wire harness at the bottom end of the wire drum 11 is more relaxed when unwound because it is farther away from the threading unit 20 at the top, and is dragged around the bottom of the wire drum 11 due to gravity. During the unwinding process of the wire harness, the wire harness will be intermittently pulled a set distance and then cut, so that the wire harness will be swung outward each time it is pulled, especially when the wire harness at the bottom of the winding drum 11 is unwound, the wire harness is dragged longer by gravity, resulting in a more severe swinging impact.

[0044] A plurality of protection units 30 may be distributed around the unwinding station. The protection unit 30 may include a mounting post 31 and bristles 32. The bristles 32 are distributed on the outer circumference of the mounting post 31. When the wire harness is unwinding, it can hit the bristles 32 when rotating, thereby playing a buffering role. One end of the bristles 32 is connected to the mounting post 31, and the positions where the bristles 32 are distributed include a first area and a second area. The bristles 32 in the first area may be perpendicular to the axis of the mounting post 31, so that a good buffering effect can be achieved for the wire harness thrown onto the mounting post 31 in all directions; the bristles 32 in the second area may be at an acute angle to the axis of the mounting post 31, so that the bristles 32 in the second area can better disperse and buffer the force through their own inclination angle, and have better durability than the bristles 32 in the first area. The vertical middle height of the first area is higher than the vertical middle height of the second area, so that during the unwinding process of the wire harness, the wire harness located in the upper half of the wire drum 11 can hit the first area when it is swung, and the wire harness located in the lower half of the wire drum 11 can hit the second area when it is swung. The second area with greater durability can withstand the swinging of the part of the wire harness with greater force, so that the overall life of the protection unit 30 can be more balanced, avoiding the situation where half of the protection unit 30 is damaged and the other half is still working.

[0045] The protection unit 30 is divided into upper and lower areas. The upper vertical bristles 32 provide omnidirectional buffering to match the area on the upper half of the bobbin 11 with relatively small throwing force. The lower bristles 32 utilize the force dispersion characteristics of the inclined angle and are designed specifically for the lower half of the wire harness with greater impact force, achieving gradient absorption of the impact force while enhancing durability. Combining with the axial guiding constraint of the wire threading unit 20, this solution forms a three-dimensional protection system, which not only avoids damage to the surface of the wire harness, but also significantly extends the service life of the equipment by adapting to the dynamic impact force in different areas.

[0046] In this embodiment, the position where the bristles 32 are distributed further includes a third area. The bristles 32 in the third area are perpendicular to the axis of the mounting post 31. The third area may be at the same height as the first area, and the third area and the first area may be arranged at a certain angle in the axial cross-section. The mounting post 31 is rotatably connected to the frame unit 10, and the mounting post 31 can rotate around the axis, so as to rotate different bristle 32 distribution areas to the side close to the bobbin 11. The distribution density of the bristles 32 in the third area may be greater than or equal to the distribution density of the bristles 32 in the first area. The third area with a larger bristle 32 distribution density can provide a better buffering effect than the first area. Thus, when the wire harness on the upper half of the bobbin 11 is unwound to the inner layer, the mounting post 31 can rotate to the third area, and the bristles 32 with a better buffering effect are used to buffer the wire harness with a stronger impact force due to the larger throwing space in the lower half of the bobbin 11, avoiding excessive wear of local bristles 32 and the need to replace the entire protection unit 30, and making the wear degree of the bristles 32 on the mounting post 31 tend to be consistent.

[0047] In this embodiment, the position where the bristles 32 are distributed further includes a fourth area. The angle between the bristles 32 in the fourth area and the axis of the mounting post 31 is an acute angle. The fourth area is at the same height as the second area, and the fourth area and the second area may be arranged at a certain angle in the axial cross-section. The distribution density of the bristles 32 in the fourth area is greater than or equal to the distribution density of the bristles 32 in the second area. The fourth area with a larger bristle 32 distribution density can provide a better buffering effect than the second area. Thus, when the wire harness on the lower half of the bobbin 11 is unwound to the inner layer, the mounting post 31 can rotate to the fourth area, and the bristles 32 with a better buffering effect are used to buffer the wire harness with a stronger throwing force.

[0048] In this embodiment, as Figure 2As shown, the second region can be located directly below the first region; the fourth region can be located directly below the third region. When unwinding the wire harness on the outer layer of the unwinding bobbin 11, the first region and the second region can be made to face the bobbin 11 simultaneously. When unwinding the wire harness on the inner layer of the unwinding bobbin 11, the third region and the fourth region are made to face the bobbin 11 simultaneously. Thereby, the number of rotations of the protection unit 30 can be reduced, and reducing the movement of the protection unit 30 can improve the stability of the equipment to a certain extent. The third region and the first region can each occupy 180° in the axial cross-section; the fourth region and the second region can also each occupy 180° in the axial cross-section, so that the working area facing the wire coil can be larger, making the buffering effect better.

[0049] In this embodiment, the bristles 32 in the second region can extend obliquely upward from the end away from the mounting post 31; the bristles 32 in the fourth region can also extend obliquely upward from the end away from the mounting post 31. When the wire harness strikes the bristles 32 to make them close to the mounting post 31 upward, the bristles 32 can recover to a certain angle under the action of gravity; when the wire harness strikes the bristles 32 to make them rotate downward, the bristles 32 can also remain horizontal or inclined downward, so that the buffering performance of the bristles 32 can be maintained stable to a certain extent.

[0050] In this embodiment, the diameter of the mounting post 31 gradually decreases in the vertically downward direction, so that the mounting post 31 can be arranged closer to the bobbin 11 to reduce the occupied space of the protection unit 30.

[0051] In this embodiment, a control method for a wire harness unwinding device is provided. The control method for the wire harness unwinding device is applied to any wire harness unwinding device in the above embodiment, as Figure 3 shown, the control method for the wire harness unwinding device may include step S10 to step S40, and the details of each step are described as follows:

[0052] Step S10, based on the wire harness unwinding device being in the working state, obtain the state of the unwinding station, so as to judge whether the usage requirement of the protection unit 30 is met. The unwinding station includes a standby state and an unwinding state. In the standby state, the unwinding station is in an empty state, and at this time, no protection control is required; in the unwinding state, there is a bobbin 11 at the unwinding station, and the bobbin 11 can continuously rotate and unwind.

[0053] Step S20, based on the unwinding station being in the unwinding state, accumulate the unwinding duration of the unwinding station, and according to the unwinding duration, it can be judged which part of the wire harness on the bobbin 11 is being unwound at this time.

[0054] Step S30: Based on the unwinding duration being less than the first duration, control the bristles 32 in the first area to face the unwinding station. When the unwinding duration is less than the first duration, the wire harness at the top of the bobbin 11 is in the unwinding state. At this time, the rotation space of the unwound wire harness is small and the hitting force is also small. Therefore, buffering the wire harness with the vertical bristles 32 in the first area can achieve a good effect.

[0055] Step S40: Based on the unwinding duration being greater than the first duration and less than the second duration, control the bristles 32 in the second area to face the unwinding station. The second duration is greater than the first duration. When the unwinding duration is greater than the first duration and less than the second duration, the wire harness at the bottom of the bobbin 11 is in the unwinding state. At this time, the unwound wire harness is far from the threading unit 20, has a large rotation space, and will generate a large hitting force. Therefore, use the inclined bristles 32 in the second area to bear the impact. When the inclined bristles 32 can reset under the action of gravity, the service life of the protection unit 30 can be extended.

[0056] In this embodiment, the position where the bristles 32 are distributed further includes a third area. The bristles 32 in the third area are perpendicular to the axis of the mounting post 31. The third area can be at the same height as the first area, and the third area and the first area can be arranged at a certain angle in the axial cross-section. The mounting post 31 is rotatably connected to the frame unit 10, and the mounting post 31 can rotate around the axis, so as to rotate different bristle distribution areas to the side close to the bobbin 11. The distance between the protection unit 30 and the unwinding station is adjustable, so that it can be adjusted adaptively according to the working needs. The distribution density of the bristles 32 in the third area is greater than or equal to the distribution density of the bristles 32 in the first area. The third area with a larger bristle distribution density can achieve a better buffering effect than the first area, and at the same time has a higher service life. Thus, when the wire harness on the upper half of the bobbin 11 is unwound to the inner layer, the mounting post 31 can rotate to the third area, and the bristles 32 with a better buffering effect are used to buffer the wire harness with a stronger flinging force. When the density of the bristles 32 in the third area is equal to that in the first area, rotating to the third area can also improve the utilization rate and service life of the entire protection unit 30.

[0057] The control method of the wire harness opening and unwinding device may further include step S50, which is specifically described as follows:

[0058] Step S50: Based on the unwinding duration being greater than the second duration and less than the third duration, control the bristles 32 in the third area to face the unwinding station. The third duration is greater than the second duration. When the unwinding duration is greater than the second duration and less than the third duration, the wire harness at the inner layer of the top end of the bobbin 11 is in the unwinding state. At this time, because the diameter of the bobbin 11 decreases, the swinging space of the wire harness increases, and the impact force also increases accordingly. Therefore, making the bristles 32 in the third area with better buffering effect bear the impact can make the wear degrees of the bristles 32 on both sides of the mounting post 31 relatively balanced, and overall extend the service life of the protection unit 30.

[0059] In this embodiment, the position where the bristles 32 are distributed further includes a fourth area. The angle between the bristles 32 in the fourth area and the axis of the mounting post 31 is an acute angle. The fourth area and the second area are at the same height, and the fourth area and the second area can be arranged at a certain angle in the axial cross-section. The distribution density of the bristles 32 in the fourth area is greater than or equal to the distribution density of the bristles 32 in the second area. The fourth area with a relatively large distribution density of the bristles 32 can achieve a better buffering effect than the second area, and at the same time has a higher service life. Thus, when the wire harness at the lower half of the bobbin 11 is unwound to the inner layer, the mounting post 31 can rotate to the fourth area, and the bristles 32 with better buffering effect are used to buffer the wire harness with a stronger swinging force. When the density of the bristles 32 in the fourth area is equal to that in the second area, rotating to the fourth area can also improve the utilization rate and service life of the entire protection unit 30.

[0060] The control method of the wire harness unwinding device further includes:

[0061] Step S60: Based on the unwinding duration being greater than the third duration and less than the fourth duration, control the bristles 32 in the fourth area to face the unwinding station. The fourth duration is greater than the third duration. When the unwinding duration is greater than the third duration and less than the fourth duration, the wire harness at the inner layer of the bottom end of the bobbin 11 is in the unwinding state. At this time, because the diameter of the bobbin 11 decreases, the swinging space of the wire harness increases, and the impact force also increases accordingly. Therefore, making the bristles 32 in the fourth area with better buffering effect bear the impact can make the wear degrees of the bristles 32 on both sides of the mounting post 31 relatively balanced, and overall extend the service life of the protection unit 30.

[0062] In this embodiment, multiple layers are wound around both the inner and outer layers of the wire harness raw material on the bobbin 11. For example, there are 3 layers in the inner layer and 3 layers in the outer layer to increase the total amount of the wire harness wound on the bobbin 11. When the axis of the bobbin 11 is placed vertically, each layer of the wire harness is wound from top to bottom.

[0063] Step S40 may include steps S41 to S43, and the details of each step are as follows:

[0064] Step S41: Based on the unwinding duration being greater than the first duration and less than the second duration (where the second duration is greater than the first duration), control the bristles 32 in the second area to face the unwinding station. When the unwinding duration is greater than the first duration and less than the second duration, the wire harness at the bottom end of the bobbin 11 is in the unwinding state. At this time, the released wire harness is far from the threading unit 20 and has a large rotation space, generating a relatively large impact force. Therefore, the inclined bristles 32 in the second area are used to withstand the impact, achieving the effect of extending the service life of the protection unit 30 under the condition that the inclined bristles 32 can reset under the action of gravity.

[0065] Step S42: Based on the unwinding duration reaching the second duration, that is, one layer of the wire harness on the outer layer has been unwound, and the unwinding of the next layer of the wire harness starts from the top end of the wire coil. At this time, the unwinding duration can be reset to zero and accumulated again. Among them, there can be multiple layers of wire harnesses on the bobbin 11, both on the outer layer and the inner layer. Before the wire harness is unwound to the inner layer, only the first area and the second area can be used for buffering.

[0066] Step S43: Repeat steps S30 to S40 until the number of repetitions reaches the first preset number, which can be the number of layers of the wire harness on the outer layer, such as 2 layers, 3 layers, or 4 layers, etc. At this time, the wire harness unwinding gradually approaches the inner layer, and the impact force during the wire harness flapping gradually increases.

[0067] Step S60 may include steps S61 to S62, and the details of each step are as follows:

[0068] Step S61: Based on the unwinding duration being greater than the third duration and less than the fourth duration (where the fourth duration is greater than the third duration), control the bristles 32 in the fourth area to face the unwinding station. When the unwinding duration is greater than the first duration and less than the second duration, the wire harness on the outer layer at the bottom end of the bobbin 11 is in the unwinding state, and the bristles 32 in the second area are used to buffer the wire harness; when the unwinding duration is greater than the third duration and less than the fourth duration, the wire harness on the inner layer at the bottom end of the bobbin 11 is in the unwinding state, and the impact force during the wire harness flapping is relatively large. The fourth area with denser bristles 32 in the fourth area is used for buffering, so that the service lives of the bristles 32 in the second area and the fourth area tend to be the same.

[0069] Step S62: Based on the unwinding duration reaching the fourth duration, one layer of the wire harness has been unwound. Callback the unwinding duration to the second duration and continue to accumulate. Use the bristles 32 in the third area and the fourth area to buffer the wire harnesses on the inner layer at the top end and the inner layer at the bottom end of the bobbin 11 respectively, so that the wear degrees of each area of the protection unit 30 tend to be the same, improving the working efficiency within the service life of the protection unit 30.

[0070] Step S43: Repeat steps S50 to S60 until the number of repetitions reaches a second preset number, at which point the unwinding of the wire harness is completed. The second preset number can be the number of layers of the wire harness in the inner layer, such as 2 layers, 3 layers, or 4 layers, etc.

[0071] It should be understood that the "present embodiment" mentioned in the present invention refers to the current technical points described. Multiple "present embodiments" can be the same embodiment or different embodiments.

[0072] Those of ordinary skill in the art can understand that the above embodiments are specific cases for implementing the present disclosure. In actual applications, various changes can be made to them in form and details without departing from the scope of the present disclosure.

Claims

1. A wire harness cutting and unwinding device, characterized in that, The wire harness opening and unwinding device includes: A frame unit, on which an unwinding station is provided for placing a bobbin. A threading unit located above the unwinding station; when the bobbin is placed at the unwinding station, the wire unwound from the bobbin passes upward through the threading unit. A plurality of protection units distributed around the unwinding station; each protection unit includes a mounting post and bristles; the bristles cover the outer peripheral surface of the mounting post; one end of the bristles is connected to the mounting post; the positions where the bristles are distributed include a first area and a second area; the bristles in the first area are perpendicular to the axis of the mounting post; the angle between the bristles in the second area and the axis of the mounting post is an acute angle, and the middle height in the vertical direction of the first area is higher than the middle height in the vertical direction of the second area.

2. The wire harness opening and unwinding device according to claim 1, characterized in that The positions where the bristles are distributed further include a third area; the bristles in the third area are perpendicular to the axis of the mounting post; the third area is at the same height as the first area; the mounting post is rotatably connected to the frame unit; the distribution density of the bristles in the third area is greater than or equal to the distribution density of the bristles in the first area.

3. The wire harness opening and unwinding device according to claim 2, characterized in that The positions where the bristles are distributed further include a fourth area; the angle between the bristles in the fourth area and the axis of the mounting post is an acute angle; the fourth area is at the same height as the second area; the distribution density of the bristles in the fourth area is greater than or equal to the distribution density of the bristles in the second area.

4. The wire harness opening and unwinding device according to claim 3, characterized in that The second area is directly below the first area; the fourth area is directly below the third area.

5. The wire harness opening and unwinding device according to claim 3, characterized in that The end of the bristles in the second area away from the mounting post extends obliquely upward; the end of the bristles in the fourth area away from the mounting post extends obliquely upward.

6. The wire harness opening and unwinding device according to claim 3, characterized in that The diameter of the mounting post gradually decreases in the vertically downward direction.

7. A control method for a wire harness opening and unwinding device, applied to the wire harness opening and unwinding device according to any one of claims 1-6, characterized in that The control method of the wire harness opening and unwinding device includes: Step S10, based on the fact that the wire harness opening and unwinding device is in a working state, obtain the state of the unwinding station; the unwinding station includes a standby state and an unwinding state; in the standby state, the unwinding station is in an empty state; in the unwinding state, there is a bobbin at the unwinding station. Step S20, based on the fact that the unwinding station is in the unwinding state, accumulate the unwinding duration of the unwinding station. Step S30: Based on the unwind duration being less than the first duration, control the bristles in the first area to face the unwind station; when the unwind duration is less than the first duration, the wire harness at the top of the bobbin is in the unwind state. Step S40: Based on the unwind duration being greater than the first duration and less than the second duration, control the bristles in the second area to face the unwind station; the second duration is greater than the first duration; when the unwind duration is greater than the first duration and less than the second duration, the wire harness at the bottom of the bobbin is in the unwind state.

8. The control method of a wire harness opening and unwinding device according to claim 7, wherein The position where the bristles are distributed further includes a third area; the bristles in the third area are perpendicular to the axis of the mounting post; the third area and the first area are at the same height; the mounting post is rotatably connected to the frame unit; the distribution density of the bristles in the third area is greater than or equal to the distribution density of the bristles in the first area. The control method of the wire harness opening and unwinding device further includes: Step S50: Based on the unwind duration being greater than the second duration and less than the third duration, control the bristles in the third area to face the unwind station. The third duration is greater than the second duration; when the unwind duration is greater than the second duration and less than the third duration, the wire harness in the inner layer at the top of the bobbin is in the unwind state.

9. The control method of a wire harness opening and unwinding device according to claim 8, wherein The position where the bristles are distributed further includes a fourth area; the angle between the bristles in the fourth area and the axis of the mounting post is an acute angle; the fourth area and the second area are at the same height; the distribution density of the bristles in the fourth area is greater than or equal to the distribution density of the bristles in the second area. The control method of the wire harness opening and unwinding device further includes: Step S60: Based on the unwind duration being greater than the third duration and less than the fourth duration, control the bristles in the fourth area to face the unwind station. The fourth duration is greater than the third duration; when the unwind duration is greater than the third duration and less than the fourth duration, the wire harness in the inner layer at the bottom of the bobbin is in the unwind state.

10. The control method of a wire harness opening and unwinding device according to claim 9, wherein The step S40 includes: Step S41: Based on the unwind duration being greater than the first duration and less than the second duration, control the bristles in the second area to face the unwind station; the second duration is greater than the first duration; when the unwind duration is greater than the first duration and less than the second duration, the wire harness at the bottom of the bobbin is in the unwind state. Step S42: Based on the unwind duration reaching the second duration, reset the unwind duration to zero and start accumulating again. Step S43: Repeat step S30 to step S40 until the number of repetitions reaches the first preset number. The step S60 includes: Step S61: Based on the unwinding duration being greater than the third duration and less than the fourth duration, control the bristles in the fourth area to face the unwinding station; the fourth duration is greater than the third duration; in the state where the unwinding duration is greater than the first duration and less than the second duration, the wire harness on the outer layer at the bottom of the bobbin is in the unwinding state; in the state where the unwinding duration is greater than the third duration and less than the fourth duration, the wire harness on the inner layer at the bottom of the bobbin is in the unwinding state. Step S62: Based on the unwinding duration reaching the fourth duration, callback the unwinding duration to the second duration and continue to accumulate. Step S63: Repeat steps S50 to S60 until the number of repetitions reaches the second preset number.

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