Device for opening and drawing identification line at sleeve on automobile wire harness

Abstract

The utility model discloses a device for opening and drawing a marking line at a sleeve on an automobile wire harness. The device comprises a bottom plate, a vertical plate, a cutter module, a sleeve mounting module and a marking pen clamping module, the vertical plate and the cutter module are arranged on the bottom plate; a sleeve mounting module and an identification pen clamping module are arranged on the vertical plate, and when an identification pen is clamped on the identification pen clamping module, a pen point of the identification pen can be in contact with the outer wall of a sleeve arranged on the sleeve mounting module in a sleeving manner, so that the pen point can draw lines on the outer wall of the sleeve in the rotating process of the sleeve; the cutter module is located on one side of the sleeve installation module, a cutter capable of stretching out of or retracting into a cutter module body is arranged in the cutter module, and when the cutter stretches out of the cutter module body, a cutter point of the cutter can make contact with the outer wall of a sleeve arranged on the sleeve installation module in a sleeving mode. The utility model discloses a device for drawing a marking line, which can complete two operations of cutting and drawing a line on a sleeve, reduces the process circulation steps, improves the production efficiency and ensures the line drawing quality.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile wiring harness auxiliary devices, in particular to a device for opening a sleeve on an automobile wiring harness and drawing a marking line. Background Art

[0002] The automotive wiring harness is the main network of the automotive circuit. The automotive wiring harness is fixed on the entire vehicle body. The damage of the wiring harness directly affects the performance of the automotive circuit. Therefore, the automotive wiring harness should be resistant to temperature, vibration, smoke, and humidity cycles.

[0003] Automotive wiring harness sheaths are widely used in automotive wiring harness protection. According to the traditional processing technology and operation process of the product, employees need to draw marking lines on the sheath after assembling the product. However, it is impossible to draw a whole circle at a time by hand, and the drawn marking lines are not smooth. In addition, the finished wire harness needs to be rotated when drawing the marking lines, which makes processing difficult. Hand-drawn marking lines have many disadvantages. At the same time, in order to facilitate subsequent operations, an opening of a certain length is usually required at one end of the sheath. In the existing sheath operation process, the drawing and cutting of the sheath are divided into two processes, which makes the process complicated and affects the processing efficiency.

[0004] Therefore, it is very necessary to design a device that can draw a marking line and make an incision on the casing of the automobile wiring harness. Utility Model Content

[0005] In view of the above problems, the utility model provides a device for opening an opening at a sleeve of an automobile wiring harness and drawing a marking line.

[0006] The technical means adopted by the utility model are as follows:

[0007] A device for opening a sleeve on an automobile wiring harness and drawing a marking line, comprising a bottom plate, a vertical plate, a cutter module, a sleeve installation module and a marking pen clamping module;

[0008] The vertical plate and the cutting knife module are arranged on the bottom plate;

[0009] The vertical plate is provided with the sleeve installation module and the marking pen clamping module, and when the marking pen is clamped on the marking pen clamping module, the pen tip of the marking pen can contact the outer wall of the sleeve sleeved on the sleeve installation module, so that the pen tip can draw a line on the outer wall of the sleeve during the rotation of the sleeve;

[0010] The cutter module is located on one side of the sleeve mounting module. A cutter that can extend out of or retract the cutter module body is provided in the cutter module. When the cutter extends out of the cutter module body, the tip of the cutter can contact the outer wall of the sleeve sleeved on the sleeve mounting module.

[0011] Further, the sleeve installation module includes a connection portion for connecting with the vertical plate and a sleeve support column arranged on the connection portion for supporting the sleeve;

[0012] The cross-sectional area of ​​the casing support column is smaller than the cross-sectional area of ​​the connecting portion, and an end surface of the connecting portion connected to the casing support column forms a limit point of the casing.

[0013] Furthermore, when the cutter extends out of the cutter module body, in the axial direction of the sleeve support column, the distance between the limit card point and the knife tip is the same as the length of the incision to be cut on the sleeve, and the distance between the limit card point and the pen tip corresponds to the position of the line to be drawn on the sleeve.

[0014] Further, the marking pen clamping module includes a marking pen clamping fixing seat and a marking pen clamping claw;

[0015] The marking pen clamping fixed seat is installed on the vertical plate, and the marking pen clamping fixed seat is provided with a through hole for inserting the marking pen, and the marking pen clamping fixed seat is provided with sliding grooves on both sides of the through hole, and the marking pen clamp is arranged in the sliding groove. The sliding groove also provides a first spring for driving the marking pen clamp to clamp the marking pen.

[0016] Furthermore, the connecting part is a tube structure, the connecting part is mounted on the vertical plate through a bearing, and the opposite end of the connecting part connected to the sleeve support column is also provided with a handle for driving the connecting part to rotate.

[0017] Furthermore, it also includes a casing clamping assembly for clamping the casing;

[0018] The casing clamping assembly includes a casing clamping head, a control panel and a steel wire rope. The casing clamping head is hinged to the connecting portion through a first supporting ear. A second spring for driving the head of the casing clamping head to clamp the casing sleeved on the casing support column is provided between the casing clamping head and the connecting portion. The control panel is hinged to the handle through a second supporting ear. The steel wire rope penetrates into the connecting portion and its two ends are respectively connected to the casing clamping head and the control panel, so that the control panel can control the casing clamping head to separate from the casing support column through the steel wire rope. A third spring for resetting the control panel is provided between the control panel and the handle.

[0019] Furthermore, the cutter module includes a cutter module body, a cutter, a cutter limiting device and a cutter resetting device;

[0020] The cutter module body is provided with a cutter mounting hole;

[0021] The cutter is installed in the cutter installation hole, and the cutter can slide in the cutter installation hole to achieve the tip of the cutter extending out or retracting into the cutter module body;

[0022] The cutter limiting device is arranged in the cutter module body, and is used to limit the cutter when the knife tip extends out of or retracts into the cutter module body;

[0023] The cutter resetting device is arranged in the cutter module body, and is used for switching the knife tip from a state of extending out of the cutter module body to a state of being retracted into the cutter module body.

[0024] Further, the cutter reset device is a cutter reset spring;

[0025] The cutter includes a first cutter handle, a second cutter handle and a knife tip which are arranged in sequence. The cross-sectional area of ​​the first cutter handle is greater than the cross-sectional area of ​​the second cutter handle, so that the end surface of one end where the first cutter handle is connected to the second cutter handle forms a cutter return spring abutment portion. A cutter return spring accommodating chamber for accommodating a cutter return spring is provided in the cutter module body. The cutter return spring is placed in the cutter return spring accommodating chamber, and one end of the cutter return spring abuts against the cutter return spring abutment portion, and the other end abuts against the inner wall surface of the cutter return spring accommodating chamber.

[0026] Furthermore, the cutter limiting device comprises a limiting plate, a limiting plate return spring and a limiting plate pressing block;

[0027] The first cutting knife handle is provided with a knife handle limiting sliding groove, one end of the knife handle limiting sliding groove is provided with a knife handle limiting clamping groove, and the depth of the knife handle limiting clamping groove is greater than the depth of the knife handle limiting sliding groove;

[0028] A limit plate receiving groove is provided in the cutter module body, the limit plate is arranged in the limit plate receiving groove, and a limit plate return spring is provided in the limit plate receiving groove;

[0029] The limit plate pressing block is arranged on the cutter module body and connected to the limit plate;

[0030] When the end of the first cutter handle pushes the cutter to slide in the cutter mounting hole so that the tip of the cutter extends out of the cutter module body, the limit plate slides relative to the limit slot of the cutter handle, and when the tip of the cutter fully extends out of the cutter module body, the limit plate is pushed by the limit plate return spring to insert into the limit slot of the cutter handle to lock the cutter;

[0031] When the limit plate pressing block is pressed, the limit plate pressing block pushes the limit plate to separate from the limit slot of the knife handle, and the cutter is driven by the cutter return spring so that the tip of the cutter is retracted into the cutter module body.

[0032] Compared with the prior art, the device for opening an opening at a sleeve and drawing a marking line on an automobile wiring harness described in the utility model has the following beneficial effects: due to the provision of a cutter module, a sleeve installation module and a marking pen clamping module, the two operations of cutting and drawing lines on the sleeve can be completed at one tooling location, reducing the process flow steps, improving production efficiency, and ensuring the quality of drawing lines. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural diagram of the first embodiment of the device for opening an opening at a sleeve and drawing a marking line on an automobile wiring harness disclosed by the utility model;

[0034] Figure 2 It is a cross-sectional view of the cutter module in the present invention, in which the tip of the cutter is in a state of extending out of the cutter module body;

[0035] Figure 3 is a cross-sectional view of the cutter module of the present invention, in which the tip of the cutter is retracted into the cutter module body;

[0036] Figure 4 This is a structural diagram of the cutter in the utility model;

[0037] Figure 5 for Figure 3 Sectional view at the middle BB;

[0038] Figure 6 for Figure 2 Sectional view at AA;

[0039] Figure 7 It is a structural diagram of a second embodiment of the device for opening an opening at a sleeve and drawing a marking line on an automobile wiring harness disclosed in the utility model;

[0040] Figure 8 It is a side view of a second embodiment of the device for opening a sleeve and drawing a marking line on an automobile wiring harness disclosed in the utility model, and the cutter module is not shown in the figure;

[0041] In the figure: 10, bottom plate; 11, vertical plate; 2, cutter module; 20, cutter module body; 200, cutter mounting hole; 201, cutter reset spring accommodating chamber; 202, limit plate accommodating groove; 21, cutter; 210, first cutter handle; 211, second cutter handle; 212, knife tip; 213, cutter reset spring abutment portion; 214, knife handle limit slide groove; 215, knife handle limit slot; 22, cutter limit device; 220, limit plate; 221, limit plate reset spring; 222, limit plate pressing block ; 23. Cutter resetting device; 3. Sleeve installation module; 30. Connecting part; 31. Sleeve support column; 32. Limit card point; 33. Handle; 4. Marking pen clamping module; 40. Marking pen clamping fixed seat; 400. Through hole; 401. Slide groove; 402. First spring; 41. Marking pen clamping claw; 5. Marking pen; 6. Sleeve clamping assembly; 60. Sleeve clamping head; 61. Control board; 62. Wire rope; 63. First support ear; 64. Second spring; 65. Second support ear; 66. Third spring. DETAILED DESCRIPTION

[0042] Example 1

[0043] like Figure 1 The device disclosed in the utility model is used for opening a sleeve and drawing a marking line on an automobile wiring harness, comprising a bottom plate 10, a vertical plate 11, a cutter module 2, a sleeve installation module 3 and a marking pen clamping module 4;

[0044] The vertical plate 11 and the cutter module 2 are arranged on the bottom plate 10;

[0045] The vertical plate 11 is provided with the sleeve installation module 3 and the marking pen clamping module 4, and when the marking pen 5 is clamped on the marking pen clamping module 4, the pen tip of the marking pen 5 can contact the outer wall of the sleeve sleeved on the sleeve installation module 3, so that the pen tip can draw a line on the outer wall of the sleeve during the rotation of the sleeve;

[0046] The cutter module 2 is located at one side of the sleeve mounting module 3. The cutter module 2 is provided with a cutter 21 which can extend out or retract the cutter module body 20. When the cutter 21 extends out of the cutter module body 20, the tip 212 of the cutter 21 can contact the outer wall of the sleeve sleeved on the sleeve mounting module 3.

[0047] The utility model discloses a device for opening an opening at a sleeve and drawing a marking line on an automobile wiring harness. Since the device comprises a cutter module, a sleeve installation module and a marking pen clamping module, the tip of the cutter can extend out of or retract into a cutter module body, and further, in the process of inserting the sleeve into the sleeve installation module, the tip of the cutter can extend out of the cutter module body, so that in the process of inserting the sleeve, the tip of the cutter contacts the outer wall of the sleeve, and the tip of the cutter cuts one end of the sleeve. When the incision is completed, the tip of the cutter is retracted into the cutter module body, and further, the marking pen is rotated to draw a line on the outer wall of the sleeve, so that the two processes of sleeve incision and line drawing are completed at one tooling location, thereby improving work efficiency and ensuring the line drawing quality and incision quality.

[0048] Furthermore, the sleeve installation module 3 includes a connection portion 30 for connecting with the vertical plate 11 and a sleeve support column 31 provided on the connection portion 30 for supporting the sleeve;

[0049] In this embodiment, the connecting portion 30 is fixed on the vertical plate 11. The connecting portion 30 may be a cylindrical body, a square body or the like. In the figure, the connecting portion 30 is a square body, one end of which is fixed on the vertical plate by a bolt or the like.

[0050] The cross-sectional area of ​​the sleeve support column 31 is smaller than the cross-sectional area of ​​the connecting portion 30, and the end surface of one end of the connecting portion 30 connected to the sleeve support column 31 forms a sleeve limit clamping point 32. In the present application, since the cross-sectional area of ​​the sleeve support column is smaller than the cross-sectional area of ​​the connecting portion, the end surface of the connecting portion forms a limit clamping point, and then when the sleeve is sleeved on the sleeve support column, the insertion end of the sleeve can abut against the limit clamping point, thereby ensuring the length of the sleeve sleeved on the sleeve support column.

[0051] Furthermore, when the cutter 21 extends out of the cutter module body 20, in the axial direction of the sleeve support column 31, the distance between the limit card point 32 and the knife tip 212 is the same as the length of the incision to be cut on the sleeve, and the distance between the limit card point 32 and the pen tip corresponds to the position of the line to be drawn on the sleeve. Through the limit card point and the distance between the limit card point and the knife tip and the pen tip, the accuracy of the incision length on the sleeve and the accuracy of the line drawing position on the sleeve can be effectively guaranteed. In this embodiment, when the sleeve is sleeved on the sleeve support column and needs to be drawn, the operator can rotate the sleeve sleeved on the sleeve support column to complete drawing a complete circle on the sleeve.

[0052] Further, the marking pen clamping module 4 includes a marking pen clamping fixing seat 40 and a marking pen clamping claw 41;

[0053] The marking pen clamping and fixing seat 40 is installed on the vertical plate 11, and the marking pen clamping and fixing seat 40 is provided with a through hole 400 for inserting the marking pen, and the marking pen clamping and fixing seat 40 is provided with a slide groove 401 on both sides of the through hole 400, and the marking pen clamping claw 41 is arranged in the slide groove 401, and the slide groove 401 is also provided with a first spring 402 for driving the marking pen clamping claw 41 to clamp the marking pen. In this embodiment, the marking pen clamping claw is provided with a groove that can be engaged with the marking pen body. Under the action of the first spring, the two marking pen clamping claws slide in the slide groove and clamp the marking pen placed in the through hole. By setting the marking pen clamping module, it can be effectively ensured that the position of the pen tip and the central axis of the sleeve support column corresponds, thereby ensuring the accuracy of drawing lines.

[0054] Furthermore, if Figure 2 , Figure 3 , Figure 4 , Figure 5 as well as Figure 6 As shown, the cutter module 2 includes a cutter module body 20, a cutter 21, a cutter limiting device 22 and a cutter resetting device 23;

[0055] The cutter module body 20 is provided with a cutter mounting hole 200;

[0056] The cutter 21 is installed in the cutter installation hole 200, and the cutter 21 can slide in the cutter installation hole 200 to achieve the tip 212 of the cutter 21 extending out or retracting into the cutter module body 20;

[0057] The cutter limiting device 22 is disposed in the cutter module body 20, and is used to limit the cutter 21 when the knife tip 212 extends out of or retracts into the cutter module body 20;

[0058] The cutter resetting device 23 is disposed in the cutter module body 20 and is used to switch the knife tip 212 from a state of extending out of the cutter module body 20 to a state of retracting the knife tip 212 into the cutter module body 20 .

[0059] Specifically, the cutter reset device 23 is a cutter reset spring;

[0060] like Figure 4As shown, the cutter 21 includes a first cutter handle 210, a second cutter handle 211 and a knife tip 212 which are arranged in sequence. The cross-sectional area of ​​the first cutter handle 210 is greater than the cross-sectional area of ​​the second cutter handle 211, so that the end surface of one end where the first cutter handle 210 is connected to the second cutter handle 211 forms a cutter reset spring abutment portion 213. A cutter reset spring accommodating chamber 201 for accommodating a cutter reset spring is provided in the cutter module body 20. The cutter reset spring is placed in the cutter reset spring accommodating chamber 201 and one end abuts against the cutter reset spring abutment portion 213, and the other end abuts against the inner wall surface of the cutter reset spring accommodating chamber 201.

[0061] The cutter limiting device 22 includes a limiting plate 220, a limiting plate return spring 221 and a limiting plate pressing block 222;

[0062] The first cutting knife handle 210 is provided with a knife handle limiting slot 214, one end of which is provided with a knife handle limiting slot 215, and the depth of the knife handle limiting slot 215 is greater than the depth of the knife handle limiting slot 214;

[0063] The cutter module body 20 is provided with a limit plate receiving groove 202, the limit plate 220 is arranged in the limit plate receiving groove 202, and the limit plate return spring 221 is arranged in the limit plate receiving groove 202;

[0064] The limit plate pressing block 222 is disposed on the cutter module body 20 and connected to the limit plate 220;

[0065] like Figure 2 and Figure 6 As shown, when the end of the first cutter handle 210 pushes the cutter 21 to slide in the cutter mounting hole 200 so that the tip 212 of the cutter 21 extends out of the cutter module body 20, the limit plate 220 slides relative to the handle limit slot 214, and when the tip 212 of the cutter 21 completely extends out of the cutter module body 20, the limit plate 220 is pushed by the limit plate reset spring 221 to insert into the handle limit slot 215 to lock the cutter;

[0066] like Figure 3 and Figure 5As shown, when the limit plate pressing block 222 is pressed, the limit plate pressing block 222 pushes the limit plate 220 to separate from the handle limit slot 215, and the cutter 21 is driven by the cutter reset spring so that the tip of the knife is retracted into the cutter module body 20. In this embodiment, the limit plate pressing block 222 includes a pressing portion 2220 for the operator to press and two limit plate connecting portions 2221 for connecting with the limit plate. The pressing portion 2220 is located on the outside of the cutter module body, and the limit plate connecting portion 2221 is inserted into the cutter module body and connected to the limit plate. By pressing the pressing portion, the pressing portion pushes the limit plate to slide in the limit plate accommodating groove through the limit plate connecting portion. In this application, the cutter module can conveniently extend and retract the cutter from the cutter module body, thereby ensuring the completion of the sleeve incision, and at the same time, it will not accidentally injure the operator during line drawing or other processes.

[0067] Example 2

[0068] like Figure 7 and Figure 8 The second embodiment of the device disclosed in the present application for opening an opening at a sleeve and drawing a marking line on an automobile wiring harness is shown. The difference between this embodiment and embodiment 1 is that in embodiment 1, the connecting part is fixed on a vertical plate, and when the sleeve is drawing a line, the operator rotates the sleeve so that the sleeve rotates on the sleeve support column, thereby completing the line drawing.

[0069] In this embodiment, the connecting part 30 is a tube structure, and the connecting part 30 is installed on the vertical plate 11 through a bearing. The opposite end of the connecting part 30 connected to the sleeve support column 31 is also provided with a handle 33 for driving the connecting part 30 to rotate. By shaking the handle on the other side of the vertical plate, the handle can drive the connecting part to rotate, and then drive the sleeve installed on the sleeve support column to rotate, thereby realizing drawing lines on the sleeve.

[0070] Furthermore, it also includes a casing clamping assembly 6 for clamping the casing;

[0071] The casing clamping assembly 6 includes a casing clamping head 60, a control panel 61 and a wire rope 62. The casing clamping head 60 is hinged to the connecting portion 30 through a first support ear 63. A second spring 64 is provided between the casing clamping head 60 and the connecting portion 30 for driving the head of the casing clamping head 60 to clamp the casing on the casing support column 31. The control panel 61 is hinged to the handle 33 through a second support ear 65. The wire rope 62 penetrates into the connecting portion 30 and its two ends are respectively connected to the casing clamping head 60 and the control panel 61, so that the control panel 61 can control the casing clamping head 60 and the casing support column through the wire rope 62. 31 is separated, and a third spring 66 for resetting the control board 61 is provided between the control board 61 and the handle 33; the present application arranges a sleeve clamping assembly, which can conveniently realize controlling the sleeve clamping head at one end of the handle to clamp or release the sleeve installed on the sleeve support column; when the sleeve is clamped, the handle is rotated, and the handle can drive the sleeve to rotate through the connecting part to complete the line drawing; when the line drawing is completed, the sleeve clamping head releases the clamping of the sleeve to facilitate the replacement of the next sleeve; the arrangement of the handle can conveniently drive the sleeve to rotate, and at the same time, the arrangement of the sleeve clamping head can clamp the sleeve to avoid the sleeve from moving during the line drawing process, thereby ensuring the integrity and accuracy of the line drawing.

[0072] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A device for opening an opening at a sleeve and drawing a marking line on an automobile wiring harness, characterized in that: It includes a base plate, a vertical plate, a cutter module, a sleeve installation module and a marking pen clamping module; The vertical plate and the cutting knife module are arranged on the bottom plate; The vertical plate is provided with the sleeve installation module and the marking pen clamping module, and when the marking pen is clamped on the marking pen clamping module, the pen tip of the marking pen can contact the outer wall of the sleeve sleeved on the sleeve installation module, so that the pen tip can draw a line on the outer wall of the sleeve during the rotation of the sleeve; The cutter module is located on one side of the sleeve mounting module. A cutter that can extend out of or retract the cutter module body is provided in the cutter module. When the cutter extends out of the cutter module body, the tip of the cutter can contact the outer wall of the sleeve sleeved on the sleeve mounting module.

2. The device for opening an opening at a sleeve and drawing a marking line on an automobile wiring harness according to claim 1, characterized in that: The sleeve installation module comprises a connection portion for connecting with the vertical plate and a sleeve support column arranged on the connection portion for supporting the sleeve; The cross-sectional area of ​​the casing support column is smaller than the cross-sectional area of ​​the connecting portion, and an end surface of the connecting portion connected to the casing support column forms a limit point of the casing.

3. The device for opening an opening at a sleeve and drawing a marking line on an automobile wiring harness according to claim 2, characterized in that: When the cutter extends out of the cutter module body, in the axial direction of the sleeve support column, the distance between the limit card point and the knife tip is the same as the length of the incision to be cut on the sleeve, and the distance between the limit card point and the pen tip corresponds to the position of the line to be drawn on the sleeve.

4. The device for opening an opening at a sleeve and drawing a marking line on an automobile wiring harness according to claim 3, characterized in that: The marking pen clamping module comprises a marking pen clamping fixing seat and a marking pen clamping claw; The marking pen clamping fixed seat is installed on the vertical plate, and the marking pen clamping fixed seat is provided with a through hole for inserting the marking pen, and the marking pen clamping fixed seat is provided with sliding grooves on both sides of the through hole, and the marking pen clamp is arranged in the sliding groove. The sliding groove also provides a first spring for driving the marking pen clamp to clamp the marking pen.

5. The device for opening an opening at a sleeve and drawing a marking line on an automobile wiring harness according to claim 4, characterized in that: The connecting part is a tube structure, and the connecting part is installed on the vertical plate through a bearing. The opposite end of the connecting part connected to the sleeve support column is also provided with a handle for driving the connecting part to rotate.

6. The device for opening an opening at a sleeve and drawing a marking line on an automobile wiring harness according to claim 5, characterized in that: Also included is a casing clamping assembly for clamping the casing; The casing clamping assembly includes a casing clamping head, a control panel and a steel wire rope. The casing clamping head is hinged to the connecting portion through a first supporting ear. A second spring for driving the head of the casing clamping head to clamp the casing sleeved on the casing support column is provided between the casing clamping head and the connecting portion. The control panel is hinged to the handle through a second supporting ear. The steel wire rope penetrates into the connecting portion and its two ends are respectively connected to the casing clamping head and the control panel, so that the control panel can control the casing clamping head to separate from the casing support column through the steel wire rope. A third spring for resetting the control panel is provided between the control panel and the handle.

7. The device for opening an opening at a sleeve and drawing a marking line on an automobile wiring harness according to any one of claims 1 to 6, characterized in that: The cutter module comprises a cutter module body, a cutter, a cutter limiting device and a cutter resetting device; The cutter module body is provided with a cutter mounting hole; The cutter is installed in the cutter installation hole, and the cutter can slide in the cutter installation hole to achieve the tip of the cutter extending out or retracting into the cutter module body; The cutter limiting device is arranged in the cutter module body, and is used to limit the cutter when the knife tip extends out of or retracts into the cutter module body; The cutter resetting device is arranged in the cutter module body, and is used for switching the knife tip from a state of extending out of the cutter module body to a state of being retracted into the cutter module body.

8. The device for opening an opening at a sleeve and drawing a marking line on an automobile wiring harness according to claim 7, characterized in that: The cutter reset device is a cutter reset spring; The cutter includes a first cutter handle, a second cutter handle and a knife tip which are arranged in sequence. The cross-sectional area of ​​the first cutter handle is greater than the cross-sectional area of ​​the second cutter handle, so that the end surface of one end where the first cutter handle is connected to the second cutter handle forms a cutter return spring abutment portion. A cutter return spring accommodating chamber for accommodating a cutter return spring is provided in the cutter module body. The cutter return spring is placed in the cutter return spring accommodating chamber, and one end of the cutter return spring abuts against the cutter return spring abutment portion, and the other end abuts against the inner wall surface of the cutter return spring accommodating chamber.

9. The device for opening an opening at a sleeve and drawing a marking line on an automobile wiring harness according to claim 8, characterized in that: The cutter limiting device comprises a limiting plate, a limiting plate return spring and a limiting plate pressing block; The first cutting knife handle is provided with a knife handle limiting sliding groove, one end of the knife handle limiting sliding groove is provided with a knife handle limiting clamping groove, and the depth of the knife handle limiting clamping groove is greater than the depth of the knife handle limiting sliding groove; A limit plate receiving groove is provided in the cutter module body, the limit plate is arranged in the limit plate receiving groove, and a limit plate return spring is provided in the limit plate receiving groove; The limit plate pressing block is arranged on the cutter module body and connected to the limit plate; When the end of the first cutter handle pushes the cutter to slide in the cutter mounting hole so that the tip of the cutter extends out of the cutter module body, the limit plate slides relative to the limit slot of the cutter handle, and when the tip of the cutter fully extends out of the cutter module body, the limit plate is pushed by the limit plate return spring to insert into the limit slot of the cutter handle to lock the cutter; When the limit plate pressing block is pressed, the limit plate pressing block pushes the limit plate to separate from the limit slot of the knife handle, and the cutter is driven by the cutter return spring so that the tip of the cutter is retracted into the cutter module body.

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