A device for manufacturing a wire harness spiral protection sleeve

Abstract

This invention discloses a device for preparing spiral protective sleeves for wire harnesses in the field of tube bundle production. The device includes a rotary drive mechanism, a tube inserter fixedly connected to the rotary output end, and a beveled blade mounted on the tube inserter. The tube inserter has a circular through-hole for the axial passage of the raw material sleeve. The cutting edge of the beveled blade extends into the circular through-hole, and the blade plane forms a preset angle with the radial cross-section of the tube inserter. When the raw material sleeve passes axially through the through-hole, the beveled blade, rotating with the tube inserter, cuts a continuous spiral slit on the tube wall. This invention achieves stable spiral cutting by synthesizing the axial movement trajectory of the raw material sleeve and the circumferential cutting trajectory of the blade. It features a simplified structure, clear processing logic, and ease of continuous production of long-size tubes.

Description

Technical Field

[0001] This invention relates to the field of tube bundle production, and more specifically to a device for preparing a spiral protective sleeve for wire harnesses. Background Technology

[0002] With the increasing automation of power, electronic, and mechanical equipment, wire harnesses, as an important medium for connecting various electrical components and transmitting signals and power, have become particularly crucial for safety protection. Wire harness spiral protective sleeves, due to their excellent flexibility, abrasion resistance, and ease of cable routing at wire harness branches, are widely used for wrapping and protecting wire harnesses in various complex wiring environments.

[0003] Currently, most commercially available spiral protective sleeves are manufactured directly using specialized extrusion molding dies, or by post-processing pre-fabricated plastic hoses using large-scale specialized CNC cutting equipment. While these mature industrial methods ensure large-scale production, their drawbacks are also quite obvious: On the one hand, production equipment is often extremely complex in structure and large in size, and is usually limited to factory assembly line operations, which cannot meet the flexibility needs of construction site or small-batch, multi-specification customized processing. On the other hand, for some special materials or pipes with specific wall thicknesses, existing general-purpose equipment often struggles to balance processing accuracy and economic cost.

[0004] If a simple manual cutting method is used, not only will the production efficiency be extremely low, but it will also be difficult to stably control the helix angle and depth of the spiral cut, which can easily lead to uneven stress on the pipe, cracking, or even complete severing. Summary of the Invention

[0005] The purpose of this invention is to provide a device for preparing a spiral protective sleeve for wire harnesses, so as to solve the problem that existing processing methods are difficult to balance processing flexibility and equipment construction costs.

[0006] To solve the above-mentioned technical problems, the present invention specifically provides the following technical solution: An apparatus for preparing a spiral protective sleeve for a wire harness, comprising: A rotary drive mechanism having a rotary output end; The tube threader has an axial extension direction and is fixedly connected to the rotary output end of the rotary drive mechanism. The axial extension direction coincides with the rotation axis of the rotary output end. A circular through hole is formed on the tube threader along its own axial direction. The circular through hole is used for the raw material sleeve to pass through. A beveled blade is fixedly mounted on the tube inserter, and the blade edge of the beveled blade is configured to extend into a circular through hole. The plane of the beveled blade is set at a preset angle with the radial section of the tube inserter, so that when the raw material sleeve passes through the circular through hole axially, a continuous spiral cut is formed on the tube wall of the raw material sleeve under the cutting action of the beveled blade rotating with the tube inserter.

[0007] Furthermore, the tube inserter has an assembly plane on its cylindrical outer wall, a support block is fixedly installed on the assembly plane, a positioning plane perpendicular to the assembly plane is formed on the support block, and a blade positioning groove is formed on the positioning plane. The width of the blade positioning groove matches the width of the beveled blade, and the depth of the blade positioning groove is less than the thickness of the beveled blade. A pressure plate is fixedly connected to the side of the backing block where the positioning plane is located. A pressing plane is formed on the pressure plate to contact the beveled blade. The pressure plate is fixedly connected to the backing block by bolts so that the pressing plane presses the beveled blade into the blade positioning groove.

[0008] Furthermore, the tube inserter has a slot for the beveled blade to extend into the circular through hole. The slot starts from the mounting plane and extends radially along the tube inserter to connect to the circular through hole.

[0009] Furthermore, the rotary drive mechanism includes: The base has a vertical support fixedly mounted on it; The drive motor is fixedly mounted on the base; The first synchronous pulley is coaxially fixed to the output shaft of the drive motor; The second synchronous pulley is coaxial with the tube inserter. The tube inserter has a shaft-shaped extension at one end of its own axial direction. The second synchronous pulley is fixedly sleeved on the outside of the shaft-shaped extension. Synchronous belt, with transmission sleeve connecting the first and second synchronous pulleys; The bearing is fixedly installed in a positioning hole at the upper end of the vertical support base, and a stepped part is formed on one side of the second synchronous pulley to fix the inner ring of the bearing.

[0010] Furthermore, the preparation device also includes a traction mechanism located on one side of the tube inserter, which is used to push the raw material sleeve into the tube inserter at a uniform speed.

[0011] Furthermore, the traction mechanism consists of two parallel and spaced belt conveyors configured to rotate in opposite directions to synchronously transport the raw material sleeve between them.

[0012] Furthermore, a first translation driver is provided at the bottom of the rotary drive mechanism. The first translation driver is configured to drive the rotary drive mechanism to translate between the working position and the standby position. The translation direction of the output end of the first translation driver is perpendicular to the axial extension direction of the tube inserter.

[0013] Furthermore, a second translation driver is provided at the bottom of the first translation driver, and the second translation driver is configured to drive the first translation driver to translate along the axial extension direction.

[0014] The beneficial effects of this invention are: This device fixes a beveled blade at a preset angle to a rotating tube inserter, so that the circumferential motion trajectory of the blade as it rotates with the tube inserter is combined with the axial motion trajectory of the raw material sleeve passing through the through hole to form a spiral path. Thus, under the drive of a single rotational power source, it realizes spiral cutting of continuously passing pipes. It features a simple structure, stable processing logic, and is easy to realize continuous production of long-size pipes. Attached Figure Description

[0015] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0016] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present invention; Figure 2 This is a front view of an embodiment of the present invention; Figure 3 This is a top view of an embodiment of the present invention; Figure 4 This is a cross-sectional schematic diagram illustrating the working principle of an embodiment of the present invention; Figure 5 This is a three-dimensional exploded view of the threader and the beveled blade according to an embodiment of the present invention; Figure 6 This is a plan view of the threader and the beveled blade according to an embodiment of the present invention; The labels in the figure represent the following: 1-pipe threader; 1a-circular through hole; 1b-assembly plane; 1c-slot; 1d-shaft extension; 2-beveled blade; 3-backing block; 3a-positioning plane; 3b-blade positioning groove; 4-pressure plate; 4a-pressing plane; 5-base; 6-vertical support; 7-drive motor; 8-first synchronous pulley; 9-second synchronous pulley; 9a-step section; 10-synchronous belt; 11-bearing; 12-belt conveyor belt; 13-first translational driver; 14-raw material sleeve. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] This embodiment provides a fabrication apparatus for a spiral protective sleeve for wire harnesses, aiming to solve the problem that existing processing methods struggle to balance processing flexibility and equipment setup costs. Specifically, refer to... Figures 1 to 6 As shown, the preparation apparatus includes a rotary drive mechanism, a tube inserter 1, and a beveled blade 2.

[0019] The rotary drive mechanism has a rotary output end. The tube threader 1 has an axial extension direction and is fixedly connected to the rotary output end of the rotary drive mechanism, with the axial extension direction coinciding with the rotation axis of the rotary output end.

[0020] A circular through-hole 1a is formed on the tube inserter 1, extending along its own axis, for the raw material sleeve 14 to pass through. A beveled blade 2 is fixedly mounted on the tube inserter 1, and the cutting edge of the beveled blade 2 is configured to extend into the circular through-hole 1a. The plane of the beveled blade 2 forms a predetermined angle with the radial section of the tube inserter 1. This ensures that when the raw material sleeve 14 passes axially through the circular through-hole 1a, the beveled blade 2, which rotates with the tube inserter 1, forms a continuous spiral cut on the wall of the raw material sleeve 14.

[0021] It should be noted that, in order to ensure that the beveled blade 2 can continuously cut spiral seams on the raw material sleeve 14, a circumferential limit must be applied to the raw material sleeve 14 during its feeding process to prevent it from rotating circumferentially with the tube threader 1. In actual processing, this circumferential limit can be achieved by the frictional force applied by the operator holding the tube, or by the clamping force of the automated conveying equipment on the tube, as long as it is ensured that the raw material sleeve 14 only performs a single axial translation.

[0022] Regarding the spatial orientation of the blade, the cutting edge of the beveled blade 2 needs to be aligned with the forward direction of the raw material sleeve 14. That is, the plane in which the cutting edge is located should be consistent with the tangential direction of the formed spiral cut, thereby generating the helix angle. In actual processing, the preset included angle ranges from 10 degrees to 80 degrees. By replacing the tube inserter 1 with different preset included angles, the processing requirements for different pitch sizes can be met.

[0023] While the aforementioned basic structure establishes the operational logic of rotary cutting, the pipe will generate continuous radial resistance on the blade during equipment operation. If the blade is simply fixed, it is prone to slight displacement, resulting in uneven cutting depth or even cutting through the pipe wall. At the same time, the simple fixing method makes it difficult to flexibly adjust the blade extension length to adapt to pipes with different wall thicknesses.

[0024] To overcome this assembly and adjustment challenge, the tube inserter 1 has an assembly plane 1b formed on its cylindrical outer wall. A support block 3 is fixedly installed on the assembly plane 1b, and a positioning plane 3a perpendicular to the assembly plane 1b is formed on the support block 3. A blade positioning groove 3b is formed on the positioning plane 3a. The width of the blade positioning groove 3b matches the width of the beveled blade 2, and the depth of the blade positioning groove 3b is less than the thickness of the beveled blade 2.

[0025] A pressure plate 4 is fixedly connected to the side of the backing block 3 where the positioning plane 3a is located. A pressing plane 4a is formed on the pressure plate 4 to contact the beveled blade 2. The pressure plate 4 is fixedly connected to the backing block 3 by bolts so that the pressing plane 4a presses the beveled blade 2 into the blade positioning groove 3b.

[0026] The tube inserter 1 also has a slot 1c for the beveled blade 2 to extend into the circular through hole 1a. The slot 1c starts from the assembly plane 1b and extends radially along the tube inserter 1 to connect to the circular through hole 1a. In this assembly structure, since the depth of the positioning slot is less than the thickness of the blade, when the bolt is tightened, the clamping plane 4a of the pressure plate 4 can apply reliable positive pressure to the blade, clamping it between the bottom of the slot and the pressure plate 4.

[0027] When it is necessary to adjust the depth of the blade extending into the circular through hole 1a, simply loosen the bolt slightly, and the blade can slide along the blade positioning groove 3b. After moving to the appropriate depth, tighten the bolt again to quickly complete the depth setting for pipes with different wall thicknesses.

[0028] In terms of power transmission, if the tube threader 1 is directly and rigidly connected to the motor output shaft, the vibration of the motor will be directly transmitted to the blade, causing roughness at the cut edge; and the axial connection between the motor and the tube threader 1 will significantly increase the longitudinal volume of the overall equipment. Based on this, the rotary drive mechanism specifically includes a base 5, a drive motor 7, a first synchronous pulley 8, a second synchronous pulley 9, a synchronous belt 10, and a bearing 11.

[0029] A vertical support base 6 is fixedly mounted on the base 5. A drive motor 7 is fixedly mounted on the base 5. A first synchronous pulley 8 is coaxially fixed to the output shaft of the drive motor 7. A second synchronous pulley 9 is coaxial with the tube threader 1. The tube threader 1 has a shaft-shaped extension 1d at one end along its axial direction, and the second synchronous pulley 9 is fixedly sleeved on the outside of the shaft-shaped extension 1d. A synchronous belt 10 drives and connects the first synchronous pulley 8 and the second synchronous pulley 9. A bearing 11 is fixedly mounted in a positioning hole at the upper end of the vertical support base 6, and a stepped portion 9a is formed on one side of the second synchronous pulley 9, which is fixedly connected to the inner ring of the bearing 11. In this structure, the second synchronous pulley 9 serves as the aforementioned rotating output end. This layout utilizes the synchronous belt 10 for flexible transmission, isolating and attenuating motor vibration, ensuring the smoothness of cutting, while the parallel transmission arrangement compresses the axial dimension of the equipment.

[0030] When the blade is cutting at a stable rotation speed, the axial feed speed of the raw material sleeve 14 should remain relatively uniform. Simple manual feeding will cause the pitch to fluctuate due to speed fluctuations, affecting product consistency. Therefore, the preparation device also includes a traction mechanism located on one side of the tube inserter 1, which is used to push the raw material sleeve 14 into the tube inserter 1 at a uniform speed.

[0031] For details, see Figure 4 As shown, the traction mechanism consists of two parallel and spaced-apart conveyor belts 12, which are configured to rotate in opposite directions to synchronously transport the raw material sleeve 14 between them. By using the upper and lower conveyor belts 12 to clamp the pipe and transport it forward by friction, a constant feed speed is ensured, and indentations that hard rollers may leave on the surface of the pipe are avoided.

[0032] Meanwhile, the frictional clamping of the upper and lower surfaces of the raw material sleeve 14 by the conveyor belt 12 naturally forms a circumferential limiting structure, which effectively resists the rotational torque generated during blade cutting, prevents the raw material sleeve 14 from rotating, and thus ensures the stable operation of the spiral cutting action.

[0033] After the traction mechanism is introduced, its conveying axis must be strictly aligned with the axis of the circular through hole 1a. However, during the initial feeding stage, the operating space is limited, making it difficult to accurately pass the pipe end through the through hole with sharp blades. To solve the interference problem during initial feeding, a first translation driver 13 is provided at the bottom of the rotary drive mechanism. The first translation driver 13 is configured to drive the rotary drive mechanism to translate between the working position and the standby position. The translation direction of the output end of the first translation driver 13 is perpendicular to the axial extension direction of the pipe threader 1. During feeding, the first translation driver 13 translates the pipe threader 1 to the side standby position, making room for the operation in front. After the pipe is guided into place on the traction mechanism, it is then translated back to the working position for cutting.

[0034] Furthermore, due to the significant differences in flexibility between raw material sleeves 14 made of different materials, the fixed distance between the traction mechanism and the pipe inserter 1 can easily lead to adverse phenomena: if the suspended section is too long when processing flexible pipes, the pipe is prone to bending and knotting when pushed in. To compensate for the defects of the fixed distance, a second translation driver is provided at the bottom of the first translation driver 13. The second translation driver is configured to drive the first translation driver 13 to translate along the axial extension direction.

[0035] The axial length of the pipe threader 1 relative to the traction mechanism can be freely adjusted through the operation of the second translational actuator. When processing flexible pipes, the distance between the two is shortened to reduce the overhang length and enhance the guiding support during material feeding; when processing harder materials or when more space is needed for material discharge and observation, the distance between the two is increased, thereby improving the device's compatibility with processing various types of flexible and hard pipes.

[0036] In this embodiment, both the first translation driver 13 and the second translation driver can generally be slide rail assemblies with locking effect. This will not be elaborated further in this embodiment. The translation directions of the first translation driver 13 and the second translation driver are described below. Figure 3 As indicated by the middle arrow.

[0037] The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the present invention. The scope of protection of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to the present invention within its spirit and scope of protection, and such modifications or equivalent substitutions should also be considered as falling within the scope of protection of the embodiments of the present invention.

Claims

1. A device for preparing a spiral protective sleeve for a wire harness, characterized in that, include: A rotary drive mechanism having a rotary output end; The tube inserter (1) has an axial extension direction. The tube inserter (1) is fixedly connected to the rotary output end of the rotary drive mechanism. The axial extension direction coincides with the rotation axis of the rotary output end. A circular through hole (1a) is formed on the tube inserter (1) along its own axial direction. The circular through hole (1a) is used for the raw material sleeve (14) to pass through. A beveled blade (2) is fixedly mounted on the tube inserter (1), and the blade of the beveled blade (2) is configured to extend into the circular through hole (1a). The plane of the beveled blade (2) is set at a preset angle with the radial section of the tube inserter (1) so that when the raw material sleeve (14) passes through the circular through hole (1a) axially, a continuous spiral cut is formed on the tube wall of the raw material sleeve (14) under the cutting action of the beveled blade (2) rotating with the tube inserter (1).

2. The apparatus for preparing a spiral protective sleeve for a wire harness according to claim 1, characterized in that, The tube inserter (1) has an assembly plane (1b) formed on its cylindrical outer wall. A support block (3) is fixedly installed on the assembly plane (1b). A positioning plane (3a) perpendicular to the assembly plane (1b) is formed on the support block (3). A blade positioning groove (3b) is formed on the positioning plane (3a). The width of the blade positioning groove (3b) matches the width of the beveled blade (2). The depth of the blade positioning groove (3b) is less than the thickness of the beveled blade (2). The backing block (3) is fixedly connected to a pressure plate (4) on the side where the positioning plane (3a) is located. A pressing plane (4a) is formed on the pressure plate (4) for contacting the beveled blade (2). The pressure plate (4) is fixedly connected to the backing block (3) by bolts so that the pressing plane (4a) presses the beveled blade (2) into the blade positioning groove (3b).

3. The apparatus for preparing a spiral protective sleeve for a wire harness according to claim 2, characterized in that, The tube inserter (1) has a slot (1c) for the oblique blade (2) to be inserted into the circular through hole (1a). The slot (1c) extends radially from the mounting plane (1b) to the circular through hole (1a).

4. The apparatus for preparing a spiral protective sleeve for a wire harness according to claim 1, characterized in that, The rotary drive mechanism includes: The base (5) has a vertical support seat (6) fixedly installed on it. The drive motor (7) is fixedly mounted on the base (5); The first synchronous pulley (8) is coaxially fixed to the output shaft of the drive motor (7); The second synchronous pulley (9) is coaxial with the tube inserter (1). The tube inserter (1) has a shaft-shaped extension (1d) at one end of its own axial direction. The second synchronous pulley (9) is fixedly sleeved on the outside of the shaft-shaped extension (1d). Synchronous belt (10) drives the first synchronous pulley (8) and the second synchronous pulley (9). The bearing (11) is fixedly installed in a positioning hole at the upper end of the vertical support base (6), and a step portion (9a) is formed on one side of the second synchronous pulley (9) to fix the inner ring of the bearing (11).

5. The apparatus for preparing a spiral protective sleeve for a wire harness according to claim 1, characterized in that, The preparation device also includes a traction mechanism disposed on one side of the tube inserter (1), the traction mechanism being used to push the raw material sleeve (14) into the tube inserter (1) at a uniform speed.

6. The apparatus for preparing a spiral protective sleeve for a wire harness according to claim 5, characterized in that, The traction mechanism consists of two parallel and spaced belt conveyors (12) configured to rotate in opposite directions to synchronously transport the raw material sleeve (14) between them.

7. The apparatus for preparing a spiral protective sleeve for a wire harness according to claim 1, characterized in that, The bottom of the rotary drive mechanism is provided with a first translation driver (13), which is configured to drive the rotary drive mechanism to translate between the working position and the standby position. The translation direction of the output end of the first translation driver (13) is perpendicular to the axial extension direction of the tube inserter (1).

8. The apparatus for preparing a spiral protective sleeve for a wire harness according to claim 7, characterized in that, A second translation driver is provided at the bottom of the first translation driver (13), and the second translation driver is configured to drive the first translation driver (13) to translate along the axial extension direction.

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