Device and method for efficiently sleeving end of wire harness with rubber ring
By designing a device including a workbench, stepper motor, feed cylinder and expansion sleeve assembly, the rubber ring suit process on the wire harness end is automated, solving the problem of low set efficiency in the prior art, and achieving an efficient and automated rubber ring suit.
Patent Information
- Application Number
- CN202411891974.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-20
- Publication Date
- 2025-03-25
AI Technical Summary
The prior art is inefficient to fit rubber rings on the ends of the wire harness. Workers need to manually take the rubber rings from the basket and expand manually, which increases the working strength and operating time.
A device including a workbench, a stepper motor, a feed cylinder and a expansion sleeve assembly is designed. The stepper motor drives the expansion sleeve assembly downward to automatically move the rubber ring on the end of the wiring harness, and uses the feed cylinder and an iron elastic arm to realize the automatic expansion and expansion of the rubber ring and the set.
It greatly reduces the work strength of workers, improves the efficiency of putting rubber rings on the end of the line harness, and realizes a fast and continuous rubber ring set.
Smart Images
Figure CN119695732A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of inserting a rubber ring into an annular groove of an end of a wiring harness, in particular to a device and a method for efficiently inserting a rubber ring into an end of a wiring harness. Background Art
[0002] The structure of a wiring harness is as follows Figure 1~Figure 2 As shown in FIG. 1 , it comprises a terminal 1 and a connecting wire 2 fixedly connected to the bottom of the terminal 1. An annular shoulder 3 is arranged on the outer cylindrical surface of the lower end of the terminal 1. An annular groove 4 is also provided on the cylindrical surface of the terminal 1 above the annular shoulder 3. When a batch of wire harnesses is produced in the workshop, the process requires that a wire is inserted into the annular groove 4 of the terminal 1 of each wire harness. Figure 3~Figure 4 The rubber ring 5 shown, as Figure 5 The diagram is a schematic structural diagram of a wiring harness with a rubber ring 5.
[0003] In a workshop, a worker sets a rubber ring 5 in the annular groove 4 of the end 1 of the wiring harness in the following way: S1. The worker takes out a wire harness and holds the end 1 with his left hand; S2. The worker takes out a rubber ring 5 from the basket containing the rubber ring 5, and then puts the rubber ring 5 on the end 1 of the wiring harness from top to bottom. At this time, the rubber ring 5 is in an expanded state, and then the worker presses the rubber ring 5 downward to move the rubber ring 5 into the annular groove 4 of the end 1. Under the elastic restoring force of the rubber ring 5, the rubber ring 5 is just fitted into the annular groove 4 of the end 1. Figure 5 As shown, a rubber ring 5 is sleeved on the end of a wiring harness; S3. The worker repeats the operations of steps S1 to S2 to continuously put a rubber ring 5 on the ends 1 of multiple wire harnesses.
[0004] However, although the operation method in the workshop can cover the rubber ring 5 on the end 1 of each wiring harness, in actual operation, there are still the following technical defects: Among them, in step S2, before each time the rubber ring 5 is installed on the end 1 of the wire harness, it is necessary to manually take a rubber ring 5 from the material basket, and then the subsequent installation operation can be carried out; and the worker takes the rubber ring 5 from the material basket. The intermediate turnover distance is long, resulting in a time-consuming process to install a rubber ring 5 on the end 1 of the wire harness, thereby reducing the efficiency of installing the rubber ring 5 on the end 1 of the wire harness.
[0005] Among them, in step S2, it is necessary to manually expand the rubber ring 5 outwards before the rubber ring 5 can be installed in the annular groove 4 of the end 1 of the wiring harness; and the operation of expanding the rubber ring 5 is manually performed, which not only increases the work intensity of the workers, but also further reduces the efficiency of installing the rubber ring 5 on the end 1 of the wiring harness.
[0006] Therefore, there is an urgent need for a device that can greatly reduce the work intensity of workers and greatly improve the efficiency of installing rubber rings on the ends of wire harnesses. Summary of the invention
[0007] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a device and method for efficiently installing a rubber ring on the end of a wiring harness, which greatly reduces the work intensity of workers and greatly improves the efficiency of installing a rubber ring on the end of a wiring harness.
[0008] The object of the present invention is achieved through the following technical solutions: a device for efficiently fitting a rubber ring on the end of a wire harness, comprising a workbench, a stepper motor fixed on the bottom surface of the workbench, the output shaft of the stepper motor passing through the workbench upward, and a rotating shaft connected to the extended end, a mounting plate connected to the top of the rotating shaft, and fitting mechanisms are arranged on the left and right sides of the mounting plate; the workbench is also provided with an installation component for positioning and installing the wire harness; The set mechanism located on the left side includes a feed cylinder fixedly mounted on the top surface of the mounting plate, the piston rod of the feed cylinder penetrates the mounting plate downward, and an L-plate is arranged on the extended end, the horizontal plate of the L-plate is fixedly mounted on the action end of the piston rod of the feed cylinder, the vertical plate of the L-plate is arranged to the left, and a fixing rod is fixedly mounted on the vertical plate, a limiting plate is welded on the cylindrical surface of the fixing rod, a clamping ring with an opening is mounted on the fixing rod, the clamping ring abuts against the limiting plate, both ends of the opening of the clamping ring are fixedly connected with iron spring arms extending downward, the bottom ends of the two iron spring arms are fixedly connected with hooks, and an expansion sleeve assembly located directly above the mounting assembly is suspended between the two hooks; The expansion sleeve assembly includes a rod, a conical head and a sleeve which are fixedly connected together from top to bottom. A radial hole is opened at the upper end of the rod. Two ends of the radial hole of the rod are respectively mounted on two hooks. The large end face diameter of the conical head is larger than the inner diameter of the rubber ring.
[0009] A plurality of supporting legs supported on the ground are fixedly arranged on the bottom surface of the workbench.
[0010] The two set mechanisms are arranged symmetrically about the rotating shaft.
[0011] The rod, the conical head and the sleeve are coaxially arranged.
[0012] The clamping ring, the two iron elastic arms and the two hooks are integrally formed.
[0013] The mounting assembly includes a bottom plate fixed on the top surface of the workbench and a vertical plate fixed on the top surface of the bottom plate. An intermediate plate and a top plate are fixed on the front end surface of the vertical plate. U-shaped grooves are provided on the front end surfaces of the intermediate plate and the top plate. The U-shaped grooves are located directly below the sleeve of the expansion sleeve assembly.
[0014] The width of the U-shaped groove is smaller than the outer diameter of the annular shoulder on the end of the wire harness.
[0015] The device also includes a controller, which is electrically connected to the feeding cylinder and the stepping motor via a signal line.
[0016] A method for efficiently installing a rubber ring on an end of a wiring harness comprises the following steps: S1. Pre-install a certain number of rubber rings on the expansion sleeve assembly. The specific steps are as follows: S11. The worker pulls the two iron spring arms outward, and the iron spring arms drive the hooks to move toward the radial hole of the rod away from the expansion sleeve assembly. When the two hooks are out of the radial hole, the worker removes the expansion sleeve assembly. S12. The worker puts multiple rubber rings on the rod from top to bottom. Since the large end diameter of the conical head is larger than the inner diameter of the rubber ring, all the rubber rings are supported on the conical head of the expansion sleeve assembly. S13, the worker reinserts the two hooks into the radial holes of the rod, thereby suspending the rod, and then suspending all the rubber rings supported on the conical head, thereby achieving pre-installation of a certain number of rubber rings on the expansion sleeve assembly; S2. Positioning the end of the wire harness: The worker takes out a wire harness from the basket, inserts the end of the wire harness into the U-shaped groove of the top plate of the mounting assembly from front to back, and supports the annular shoulder on the end of the wire harness on the top surface of the top plate, thereby positioning the end of the wire harness. At this time, the end of the wire harness is just below the sleeve of the expansion sleeve assembly; S3. The worker controls the piston rod of the feed cylinder of the left set mechanism to extend downward, and the piston rod drives the L plate to move downward, the L plate drives the fixed rod to move downward, the fixed rod drives the clamp ring to move downward, the clamp ring drives the iron spring arm and the hook to move downward, the hook drives the expansion sleeve assembly to move downward synchronously, and the expansion sleeve assembly drives all the rubber rings thereon to move downward synchronously. When the piston rod of the feed cylinder is fully extended, the sleeve just fits on the outside of the end of the wire harness, and the bottom surface of the sleeve just approaches the annular groove on the end; S4. The worker presses down the rubber ring at the bottom layer of the conical head. The rubber ring expands when passing through the sleeve downward. When the expanded rubber ring falls off the sleeve and moves to the annular groove of the end, the rubber ring is just tightly held in the annular groove of the end due to the elastic restoring force of the rubber ring, thereby achieving a rubber ring on the end of a wire harness. S5. Removal of the wiring harness with the rubber ring: The worker controls the piston rod of the feed cylinder to retract upward, the piston rod drives the L plate to move upward, the L plate drives the fixing rod to move upward, the fixing rod drives the clamping ring to move upward, the clamping ring drives the iron spring arm and the hook to move upward, the hook drives the expansion sleeve assembly to move upward synchronously, when the expansion sleeve assembly is reset, the worker removes the wiring harness with the rubber ring from the U-shaped groove; S6. The worker repeats steps S2 to S5 for multiple times, and can continuously put a rubber ring on the ends of multiple wire harnesses. S7. When all the rubber rings on the conical head of the left expansion sleeve assembly have been used up, the worker controls the stepper motor to start, the stepper motor drives the shaft to rotate, the shaft drives the mounting plate to rotate, and the mounting plate drives the two set mechanisms thereon to rotate synchronously. When the mounting plate rotates 180°, the controller controls the stepper motor to turn off. At this time, the expansion sleeve assembly on the other set mechanism is just above the mounting assembly, so that the rubber ring on the expansion sleeve assembly is used.
[0017] The invention has the following advantages: the working intensity of workers is greatly reduced, and the efficiency of installing the rubber ring on the end of the wire harness is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a schematic diagram of the structure of the wiring harness; Figure 2 for Figure 1 The main cross-sectional diagram of Figure 3 It is a schematic diagram of the structure of the rubber ring; Figure 4 for Figure 3 A top view of Figure 5 It is a schematic diagram of a rubber ring being sleeved in an annular groove of an end; Figure 6 It is a structural schematic diagram of the present invention; Figure 7 for Figure 6 AA section view; Figure 8 It is a structural schematic diagram of the expansion sleeve assembly; Fig. 9 for Figure 8 The main cross-sectional diagram of Fig.10 It is a schematic diagram of the structure of the installation component; Fig.11 for Fig.10 The main view; Fig.12 A schematic diagram of pre-installing a certain number of rubber rings on the expansion sleeve assembly; Fig.13 for Fig.12BB cross-sectional view; Fig.14 A schematic diagram for realizing the positioning of the end of the wiring harness; Fig.15 for Fig.14 A partial enlarged view of the C part; Fig.16 A schematic diagram of a sleeve being sleeved on the outside of an end of a wiring harness; Fig.17 for Fig.16 A partial enlarged view of the D part; Fig.18 A schematic diagram of putting a rubber ring on the end of a wiring harness; In the figure: 1-end, 2-connecting wire, 3-annular shoulder, 4-annular groove, 5-rubber ring; 6-working table, 7-stepping motor, 8-mounting plate, 9-assembly mechanism, 10-mounting assembly; 11-feed cylinder, 12-L plate, 13-fixed rod, 14-limiting plate, 15-clamping ring, 16-iron elastic arm, 17-hook, 18-expansion sleeve assembly, 19-rod, 20-conical head, 21-sleeve, 22-radial hole; 23-vertical plate, 24-middle plate, 25-top plate, 26-U-shaped groove. DETAILED DESCRIPTION
[0019] The present invention is further described below in conjunction with the accompanying drawings, and the protection scope of the present invention is not limited to the following: like Figure 6~Figure 11 As shown, a device for efficiently fitting a rubber ring on the end of a wiring harness comprises a workbench 6, a stepper motor 7 fixedly mounted on the bottom surface of the workbench 6, the output shaft of the stepper motor 7 passes through the workbench 6 upward, and a rotating shaft is connected to the extended end, a mounting plate 8 is connected to the top of the rotating shaft, and fitting mechanisms 9 are arranged on the left and right sides of the mounting plate 8, and the two fitting mechanisms 9 are arranged symmetrically about the rotating shaft; the workbench 6 is also provided with a mounting assembly 10 for positioning and installing the wiring harness; a plurality of support legs supported on the ground are fixedly arranged on the bottom surface of the workbench 6.
[0020] The set mechanism 9 located on the left side includes a feed cylinder 11 fixedly mounted on the top surface of the mounting plate 8, the piston rod of the feed cylinder 11 penetrates the mounting plate 8 downward, and an L-plate 12 is arranged on the extending end, the horizontal plate of the L-plate 12 is fixedly mounted on the action end of the piston rod of the feed cylinder 11, the vertical plate of the L-plate 12 is arranged to the left, and a fixing rod 13 is fixedly mounted on the vertical plate, a limiting plate 14 is welded on the cylindrical surface of the fixing rod 13, a clamping ring 15 with an opening is set on the fixing rod 13, the clamping ring 15 rests on the limiting plate 14, both ends of the opening of the clamping ring 15 are fixedly connected with iron spring arms 16 extending downward, the bottom ends of the two iron spring arms 16 are fixedly connected with hooks 17, and an expansion sleeve assembly 18 located directly above the mounting assembly 10 is suspended between the two hooks 17; the clamping ring 15, the two iron spring arms 16 and the two hooks 17 are integrally formed.
[0021] The expansion sleeve assembly 18 includes a rod 19, a conical head 20 and a sleeve 21 which are fixedly connected together in sequence from top to bottom. The rod 19, the conical head 20 and the sleeve 21 are coaxially arranged. A radial hole 22 is opened at the upper end of the rod 19. Two ends of the radial hole 22 of the rod 19 are respectively sleeved on two hooks 17. The large end face diameter of the conical head 20 is larger than the inner diameter of the rubber ring 5.
[0022] The mounting assembly 10 includes a bottom plate fixed on the top surface of the workbench 6, a vertical plate 23 fixed on the top surface of the bottom plate, an intermediate plate 24 and a top plate 25 fixed on the front end surface of the vertical plate 23, and a U-shaped groove 26 is formed on the front end surfaces of the intermediate plate 24 and the top plate 25, and the U-shaped groove 26 is located directly below the sleeve 21 of the expansion sleeve assembly 18. The groove width of the U-shaped groove 26 is smaller than the outer diameter of the annular shoulder 3 on the end 1 of the wire harness.
[0023] The device also includes a controller, which is electrically connected to the feed cylinder 11 and the stepper motor 7 via a signal line. Workers can use the controller to control the extension or retraction of the piston rod of the feed cylinder 11, and can also control the start or stop of the stepper motor 7, thereby facilitating the worker's operation.
[0024] A method for efficiently installing a rubber ring on an end of a wiring harness comprises the following steps: S1. Pre-install a certain number of rubber rings 5 on the expansion sleeve assembly 18. The specific operation steps are as follows: S11, the worker pulls the two iron spring arms 16 outward, and the iron spring arms 16 drive the hook 17 to move toward the radial hole 22 of the rod 19 away from the expansion sleeve assembly 18. When the two hooks 17 are disengaged from the radial hole 22, the worker removes the expansion sleeve assembly 18; S12. Workers will have multiple Figure 3~Figure 4The rubber ring 5 shown is put on the rod 19 from top to bottom. Since the large end diameter of the conical head 20 is larger than the inner diameter of the rubber ring 5, the rubber ring 5 is fully supported on the conical head 20 of the expansion sleeve assembly 18; S13, the worker reinserts the two hooks 17 into the radial holes 22 of the rod 19, thereby suspending the rod 19, and then suspending all the rubber rings 5 supported on the conical head 20, thereby achieving pre-installation of a certain number of rubber rings 5 on the expansion sleeve assembly 18, such as Figure 12~Figure 13 As shown; S2. Positioning the end 1 of the wire harness: The worker takes out a Figure 1~Figure 2 As shown in the wiring harness, the end 1 of the wiring harness is embedded into the U-shaped groove 26 of the top plate 25 of the mounting assembly 10 from front to back, and the annular shoulder 3 on the end 1 of the wiring harness is supported on the top surface of the top plate 25, thereby achieving the positioning of the end 1 of the wiring harness, as shown in FIG. Figure 14~Figure 15 As shown, at this time, the end 1 of the wire harness is just below the sleeve 21 of the expansion sleeve assembly 18; S3. The worker controls the piston rod of the feed cylinder 11 of the left set mechanism 9 to extend downward, and the piston rod drives the L plate 12 to move downward, and the L plate 12 drives the fixing rod 13 to move downward, and the fixing rod 13 drives the clamping ring 15 to move downward, and the clamping ring 15 drives the iron spring arm 16 and the hook 17 to move downward, and the hook 17 drives the expansion sleeve assembly 18 to move downward synchronously, and the expansion sleeve assembly 18 drives all the rubber rings 5 thereon to move downward synchronously. When the piston rod of the feed cylinder 11 is fully extended, the sleeve 21 just fits on the outside of the end 1 of the wiring harness, as shown in FIG. Figure 16-17 As shown, the bottom surface of the sleeve 21 is just close to the annular groove 4 on the end head 1; S4. The worker presses down the rubber ring 5 at the bottom layer on the conical head 20. The rubber ring 5 expands when passing through the sleeve 21 downward. When the expanded rubber ring 5 falls off the sleeve 21 and moves to the annular groove 4 of the terminal 1, the rubber ring 5 is just tightly held in the annular groove 4 of the terminal 1 under the elastic restoring force of the rubber ring 5, thereby achieving a rubber ring 5 on the terminal of a wire harness. Figure 5 and Fig.18 As shown; S5. Removal of the wiring harness with the rubber ring 5: The worker controls the piston rod of the feed cylinder 11 to retract upward, the piston rod drives the L plate 12 to move upward, the L plate 12 drives the fixing rod 13 to move upward, the fixing rod 13 drives the clamping ring 15 to move upward, the clamping ring 15 drives the iron spring arm 16 and the hook 17 to move upward, the hook 17 drives the expansion sleeve assembly 18 to move upward synchronously, and when the expansion sleeve assembly is reset 18, the worker removes the wiring harness with the rubber ring 5 from the U-shaped groove 26; S6. The worker repeats the operations of steps S2 to S5 for multiple times, and can continuously put a rubber ring 5 on the ends 1 of multiple wire harnesses; S7. When all the rubber rings 5 on the conical head 20 of the left expansion sleeve assembly 18 are used up, the worker controls the stepper motor 7 to start, the stepper motor 7 drives the rotating shaft to rotate, the rotating shaft drives the mounting plate 8 to rotate, and the mounting plate 8 drives the two set mechanisms 9 thereon to rotate synchronously. When the mounting plate 8 rotates 180°, the controller controls the stepper motor 7 to turn off. At this time, the expansion sleeve assembly 18 on the other set mechanism 9 is just above the mounting assembly 10, so that the rubber ring 5 on the expansion sleeve assembly 18 is used.
[0025] Among them, it can be seen from steps S2 to S6 that the worker only needs to control the piston rod of the feeding cylinder 11 of the sleeve mechanism 9 to extend downward so that the sleeve 21 is sleeved on the outside of the end 1 of the wire harness, and then the worker presses down the rubber ring 5 located on the conical head 20 to quickly sleeve the rubber ring 5 into the annular groove 4 of the end 1 of the wire harness. It can be seen that the device realizes the rapid and continuous delivery of the rubber ring 5 to the end 1 of the wire harness, and the worker does not need to take the rubber ring 5 from the material basket, shortening the intermediate turnover distance, thereby realizing the sleeve of a rubber ring 5 on the end 1 of a wire harness in a short time, thereby greatly improving the efficiency of sleeve the rubber ring 5 on the end 1 of the wire harness.
[0026] Among them, it can be seen in step S4 that when the worker presses down the rubber ring 5 at the bottom layer, the rubber ring 5 is automatically expanded by the sleeve 21 when passing through the sleeve 21, and then when the rubber ring 5 is separated from the sleeve 21, it is automatically sleeved in the annular groove 4 of the end 1 of the wire harness under the elastic restoring force of the rubber ring 5. It can be seen that compared with the sleeve method in the workshop, the device does not require the worker to manually expand the rubber ring 5 and then sleeve it, but realizes the automatic expansion of the rubber ring, which not only greatly reduces the work intensity of the workers, but also greatly improves the efficiency of sleeved the rubber ring 5 on the end 1 of the wire harness.
Claims
1. A device for efficiently fitting a rubber ring on the end of a wiring harness, characterized in that: It comprises a workbench (6), a stepper motor (7) fixedly mounted on the bottom surface of the workbench (6), an output shaft of the stepper motor (7) passing through the workbench (6) upwards, a rotating shaft connected to the extended end, a mounting plate (8) connected to the top of the rotating shaft, and a sleeve mechanism (9) arranged on the left and right sides of the mounting plate (8); the workbench (6) is also provided with an installation component (10) for positioning and installing the wiring harness; The sleeve mechanism (9) located on the left side comprises a feed cylinder (11) fixedly mounted on the top surface of the mounting plate (8), the piston rod of the feed cylinder (11) passes through the mounting plate (8) downward, and an L plate (12) is arranged on the extended end, the horizontal plate of the L plate (12) is fixedly mounted on the action end of the piston rod of the feed cylinder (11), the vertical plate of the L plate (12) is arranged to face left, and a fixing rod (13) is fixedly mounted on the vertical plate, a limiting plate (14) is welded on the cylindrical surface of the fixing rod (13), a clamping ring (15) with an opening is sleeved on the fixing rod (13), the clamping ring (15) abuts against the limiting plate (14), both ends of the opening of the clamping ring (15) are fixedly connected with iron spring arms (16) extending downward, the bottom ends of the two iron spring arms (16) are fixedly connected with hooks (17), and an expansion sleeve assembly (18) located directly above the mounting assembly (10) is suspended between the two hooks (17); The expansion sleeve assembly (18) comprises a rod (19), a conical head (20) and a sleeve (21) which are fixedly connected together in sequence from top to bottom. A radial hole (22) is provided at the upper end of the rod (19). Two ends of the radial hole (22) of the rod (19) are respectively sleeved on two hooks (17). The diameter of the large end surface of the conical head (20) is larger than the inner diameter of the rubber ring (5).
2. The device for efficiently fitting a rubber ring on the end of a wiring harness according to claim 1, characterized in that: A plurality of support legs supported on the ground are fixedly arranged on the bottom surface of the workbench (6).
3. The device for efficiently fitting a rubber ring on the end of a wiring harness according to claim 2, characterized in that: The two set mechanisms (9) are arranged symmetrically about the rotating shaft.
4. The device for efficiently fitting a rubber ring on the end of a wiring harness according to claim 3, characterized in that: The rod (19), the conical head (20) and the sleeve (21) are coaxially arranged.
5. The device for efficiently fitting a rubber ring on the end of a wiring harness according to claim 4, characterized in that: The clamping ring (15), the two iron elastic arms (16) and the two hooks (17) are integrally formed.
6. The device for efficiently fitting a rubber ring on the end of a wiring harness according to claim 5, characterized in that: The mounting assembly (10) comprises a bottom plate fixedly mounted on the top surface of a workbench (6), and a vertical plate (23) fixedly mounted on the top surface of the bottom plate; an intermediate plate (24) and a top plate (25) are fixedly mounted on the front end surface of the vertical plate (23); a U-shaped groove (26) is formed on the front end surfaces of the intermediate plate (24) and the top plate (25); the U-shaped groove (26) is located directly below the sleeve (21) of the expansion sleeve assembly (18).
7. The device for efficiently fitting a rubber ring on the end of a wiring harness according to claim 6, characterized in that: The width of the U-shaped groove (26) is smaller than the outer diameter of the annular shoulder (3) on the end (1) of the wire harness.
8. The device for efficiently fitting a rubber ring on the end of a wiring harness according to claim 7, characterized in that: The device also includes a controller, which is electrically connected to the feed cylinder (11) and the stepper motor (7) via a signal line.
9. A method for efficiently fitting a rubber ring on the end of a wiring harness, using the device for efficiently fitting a rubber ring on the end of a wiring harness as claimed in claim 8, characterized in that: It includes the following steps: S1. Pre-install a certain number of rubber rings (5) on the expansion sleeve assembly (18). The specific operation steps are as follows: S11, the worker pulls the two iron spring arms (16) outward, and the iron spring arms (16) drive the hook (17) to move in the direction of the radial hole (22) of the rod (19) away from the expansion sleeve assembly (18). When the two hooks (17) are released from the radial hole (22), the worker removes the expansion sleeve assembly (18); S12, the worker puts a plurality of rubber rings (5) on the rod (19) from top to bottom. Since the large end diameter of the conical head (20) is larger than the inner diameter of the rubber ring (5), the rubber ring (5) is fully supported on the conical head (20) of the expansion sleeve assembly (18); S13, the worker reinserts the two hooks (17) into the radial holes (22) of the rod (19), thereby suspending the rod (19), and further suspending all the rubber rings (5) supported on the conical head (20), thereby achieving pre-installation of a certain number of rubber rings (5) on the expansion sleeve assembly (18); S2. Positioning the end (1) of the wire harness: The worker takes out a wire harness from the material basket, inserts the end (1) of the wire harness into the U-shaped groove (26) of the top plate (25) of the mounting assembly (10) from front to back, and supports the annular shoulder (3) on the end (1) of the wire harness on the top surface of the top plate (25), thereby positioning the end (1) of the wire harness. At this time, the end (1) of the wire harness is just below the sleeve (21) of the expansion sleeve assembly (18); S3. The worker controls the piston rod of the feed cylinder (11) of the left-side set mechanism (9) to extend downward, and the piston rod drives the L plate (12) to move downward, the L plate (12) drives the fixing rod (13) to move downward, the fixing rod (13) drives the snap ring (15) to move downward, the snap ring (15) drives the iron spring arm (16) and the hook (17) to move downward, the hook (17) drives the expansion sleeve assembly (18) to move downward synchronously, and the expansion sleeve assembly (18) drives all the rubber rings (5) thereon to move downward synchronously. When the piston rod of the feed cylinder (11) is fully extended, the sleeve (21) is just sleeved on the outside of the end (1) of the wiring harness, and the bottom surface of the sleeve (21) is just close to the annular groove (4) on the end (1); S4. The worker presses the rubber ring (5) at the bottom layer on the conical head (20) downward, and the rubber ring (5) is expanded when passing through the sleeve (21) downward. When the rubber ring (5) in the expanded state falls off the sleeve (21) and moves to the annular groove (4) of the end head (1), the rubber ring (5) is just tightly held in the annular groove (4) of the end head (1) under the elastic restoring force of the rubber ring (5), thereby achieving a rubber ring (5) being mounted on the end head of a wiring harness; S5. Removal of the wiring harness with the rubber ring (5): The worker controls the piston rod of the feed cylinder (11) to retract upward, the piston rod drives the L plate (12) to move upward, the L plate (12) drives the fixing rod (13) to move upward, the fixing rod (13) drives the clamping ring (15) to move upward, the clamping ring (15) drives the iron spring arm (16) and the hook (17) to move upward, the hook (17) drives the expansion sleeve assembly (18) to move upward synchronously, and when the expansion sleeve assembly (18) is reset, the worker removes the wiring harness with the rubber ring (5) from the U-shaped groove (26); S6. The worker repeats steps S2 to S5 for multiple times, and can continuously put a rubber ring (5) on the ends (1) of multiple wire harnesses. S7. When all the rubber rings (5) on the conical head (20) of the left expansion sleeve assembly (18) have been used, the worker controls the stepper motor (7) to start, the stepper motor (7) drives the rotating shaft to rotate, the rotating shaft drives the mounting plate (8) to rotate, the mounting plate (8) drives the two set mechanisms (9) thereon to rotate synchronously, and when the mounting plate (8) rotates 180°, the controller controls the stepper motor (7) to turn off, at which time, the expansion sleeve assembly (18) on the other set mechanism (9) is just above the mounting assembly (10), so that the rubber ring (5) on the expansion sleeve assembly (18) is used.