Safety device for a terminal crimping machine

Abstract

The utility model provides a kind of safety device of terminal crimping machine, including laser light receiving photoelectric switch transmitting end, laser light receiving photoelectric switch receiving end, normally closed intermediate relay, crimping machine is set on workbench, and foot switch is equipped in workbench lower, laser light receiving photoelectric switch transmitting end and laser light receiving photoelectric switch receiving end are respectively set in the front end and rear end of crimping machine base;The signal output end of laser light receiving photoelectric switch receiving end is connected with normally closed intermediate relay to control the opening and closing of normally closed intermediate relay, and the signal output end of normally closed intermediate relay is connected with foot switch in series arrangement.The present application can be controlled crimping machine by laser light receiving photoelectric switch and foot switch jointly, when the hand of terminal crimping operator blocks laser, laser light receiving switch signal receiving end controls normally closed intermediate relay to disconnect circuit, even if stepping down foot switch, reciprocating motor shaft of crimping machine also cannot move downward, avoid happening industrial injury accident.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical equipment, and in particular relates to a safety protection device for a terminal crimping machine. Background Technology

[0002] A crimping machine, also known as a terminal crimping machine, is a specialized tool used for crimping wires to terminals. Its core function is to apply controlled pressure via mechanical or hydraulic systems to firmly and precisely crimp metal terminals (such as copper connectors) to the ends of wires, thereby forming a low-resistance, high-strength electrical connection. In the automotive electronics field, crimping machines are key equipment in wire harness manufacturing. As the "nervous system" of a vehicle, the connection quality of automotive wire harnesses directly affects the vehicle's safety and reliability. Crimping small-section automotive wires (0.5mm²-4mm²) typically requires applying a force of 2-4 tons.

[0003] When crimping terminals that are not in a chain using a crimping machine, the operator needs to hold the terminal with one hand and the wire with the other, aligning the stripped portion of the wire with the corresponding groove on the terminal. Then, the operator presses the foot pedal switch. Upon receiving the electrical signal, the crimping machine drives the blade to crimp the wire and terminal together. During crimping, the operator needs to adjust the distance between their fingers and the crimping blade according to the size and shape of the terminal. If the fingers are too far from the crimping blade, product quality cannot be guaranteed. The operator's hand must not leave the terminal before completing the above operation, especially when the terminal is small, as the hand needs to be very close to the crimping blade. The hand must not leave the terminal until the crimping action is complete. If the operator is not focused, workplace accidents are likely to occur.

[0004] Patent application number 201720005160.4 discloses a semi-automatic terminal crimping machine with a safety light curtain protection function. A safety light curtain, electrically connected to an electrical controller, is installed between the upper and lower die punches. When the light curtain is blocked, a light-blocking signal is sent to the electrical controller, which then stops the punch from pressing down, preventing injury to workers and reducing accidents. However, in scenarios where operators need to continuously stabilize the terminals during crimping, the hand remains within the light curtain's monitoring range. The system cannot distinguish between normal operation and dangerous actions, rendering the protection function ineffective.

[0005] Crimping automotive wiring harness terminals often requires a positioning accuracy of ±0.1mm, necessitating fine-tuning of the position by workers through tactile feedback. Traditional grating systems, for safety reasons, require a large stopping distance, making them unsuitable for the close-range precision operations required by the automotive industry, and failing to meet the requirement that workers' hands must remain on the terminals until the crimping process is complete. Summary of the Invention

[0006] The purpose of this invention is to provide a safety protection device for a terminal crimping machine that is simple in structure and precise in operation, especially suitable for crimping small, non-chained terminals with small cross-sectional area wires of 0.5mm²-4mm².

[0007] The technical solution of this utility model is: a safety protection device for a terminal crimping machine, comprising a laser photoelectric switch transmitter, a laser photoelectric switch receiver, and a normally closed intermediate relay. The crimping machine is mounted on a workbench, with a foot switch underneath. The laser photoelectric switch transmitter and receiver are respectively located at the front and rear ends of the crimping machine base, and are aligned with one side of the crimping head. The signal output of the laser photoelectric switch receiver is connected to the signal input of the normally closed intermediate relay to control its opening and closing. The signal output of the normally closed intermediate relay is connected in series with the foot switch to jointly control the operation of the crimping machine.

[0008] When the operator holds the terminal and places it on the base below the crimping head, with their hand within the crimping head's pressing range, the laser photoelectric switch receiver cannot receive the signal from the laser photoelectric switch transmitter. Its signal output then transmits the signal to the signal input of a normally closed intermediate relay. The normally closed intermediate relay's signal output disconnects the foot pedal circuit connected in series with it. Even if the foot switch is pressed, the crimping machine's main unit will not move the crimping head downwards because it does not receive a signal, thus protecting the operator's safety. When the operator's hand is outside the crimping head's pressing range, the laser photoelectric switch receiver can receive the signal from the laser photoelectric switch transmitter. Its signal output then transmits the signal to the signal input of a normally closed intermediate relay. The normally closed intermediate relay's signal output then connects the foot pedal circuit connected in series with it. Pressing the foot pedal opens the crimping machine, and the crimping machine's reciprocating motor moves the crimping head downwards, allowing the crimping machine to operate normally and complete the crimping operation.

[0009] The safety protection device of the terminal crimping machine also includes a low-voltage DC power supply to provide power to the laser photoelectric switch transmitter and receiver.

[0010] The transmitter and receiver of this laser photoelectric switch both use low-voltage DC power supplies, which are stable and reliable.

[0011] The normally closed intermediate relay used in this invention has its signal output terminal connected in series with the foot pedal circuit to control the crimping machine.

[0012] The safety protection device of the terminal crimping machine also includes an audible and visual alarm device, and the signal output terminal of the normally closed intermediate relay controls the switch of the audible and visual alarm device.

[0013] When the receiver of the laser photoelectric switch does not receive the signal from the transmitter, its signal output terminal controls the normally closed intermediate relay to output signals in two ways. One signal output terminal controls the audible and visual alarm device to turn on, reminding the operator to pay attention to safety. The other signal output terminal controls the foot switch to remain closed, protecting the operator's fingers from injury.

[0014] The front and rear ends of the crimping machine base are respectively equipped with horizontal guide rails, and movable columns are provided on the horizontal guide rails. The columns are set perpendicular to the crimping machine base. Vertical guide rails are provided on the opposite side walls of the two columns. The laser photoelectric switch transmitter and the laser photoelectric switch receiver are respectively movably set on the vertical guide rails.

[0015] Since the crimping machine needs to crimp terminals and wires of different types, the positions of the laser photoelectric switch transmitter and receiver can be adjusted according to the size and shape of the terminals, so that the laser photoelectric switch can detect fingers that have entered dangerous positions but cannot detect the terminals.

[0016] The horizontal guide rail has a trapezoidal cross-section, and the lower end of the column is provided with two parallel pressing parts at intervals. The lower end of each pressing part is provided with a buckle that matches the cross-section of the horizontal guide rail, and the two buckles are spaced apart.

[0017] The vertical guide rail has a trapezoidal cross-section. The lower ends of the laser photoelectric switch transmitter and receiver are respectively provided with two parallel pressing parts. The lower ends of the pressing parts are respectively provided with buckles that match the cross-section of the vertical guide rail, and the two buckles are spaced apart.

[0018] In use, press the two parallel pressing parts, and the two latches will move closer together, allowing the switch to move within the horizontal or vertical guide rail. When it reaches the desired fixed position, release the pressing parts, and the two latches will engage with the horizontal or vertical guide rail to fix the positions of the laser photoelectric switch transmitter and receiver.

[0019] The crimping machine includes a worktable, a base, support side plates, a main unit, and a reciprocating motor. The base is set on the worktable, and the two support side plates are respectively vertically set on both sides of the rear end of the base. The reciprocating motor and the main unit are set on the upper end of the support side plates, and the motor shaft is set on the lower end of the reciprocating motor. The crimping cutter head is set on the lower end of the motor shaft.

[0020] The rear end of the base is vertically equipped with a back baffle, which is located at the rear of the side plate of the bracket and is perpendicular to the side plate of the bracket.

[0021] The advantages and positive effects of the safety protection device for the terminal crimping machine of this utility model are: simple structure, flexible setting of protection measures according to different terminals and wires, protection of operators, and prevention of work-related injuries such as finger crushing accidents. It is especially suitable for crimping small cross-sectional area wires with a wire diameter of 0.5mm²-4mm² and their matching non-chain terminals. Attached Figure Description

[0022] Figure 1 This is the main view of the protective crimping machine structure of this utility model.

[0023] Figure 2 This is a side view of the structure of the protective crimping machine of this utility model.

[0024] Figure 3 This is a circuit diagram of a crimping machine with protective function, which is part of this utility model.

[0025] Figure 4 This is a top view of the base of this utility model.

[0026] Figure 5 This is a schematic diagram of the vertical guide rail structure of the column of this utility model.

[0027] In the diagram: 1. Workbench; 2. Base; 3. Support side plate; 4. Main unit; 5. Reciprocating motor; 6. Motor shaft; 7. Crimping knife head; 8. Back baffle; 9. Laser photoelectric switch transmitter; 10. Laser photoelectric switch receiver; 11. Foot switch; 12. Wire; 13. Audible and visual alarm device; 14. Normally closed intermediate relay; 15. Low-voltage DC power supply; 16. Buckle; 17. Horizontal guide rail; 18. Column; 19. Vertical guide rail; 20. Pressing part. Detailed Implementation

[0028] like Figure 1-3 As shown, a safety protection device for a terminal crimping machine includes a laser photoelectric switch transmitter 9, a laser photoelectric switch receiver 10, and a normally closed intermediate relay 14. The crimping machine is mounted on a workbench 1. The laser photoelectric switch transmitter 9 and the laser photoelectric switch receiver 10 are respectively located at the front and rear ends of the crimping machine base 2. The laser photoelectric switch transmitter 9, the laser photoelectric switch receiver 10, and one side of the crimping head 7 are on the same straight line. A foot switch 11 is provided under the workbench 1. The power switch of the main unit 4 is connected in series with the signal output terminal of the normally closed intermediate relay 14 and the foot switch 11 through a wire 12. The signal output terminal of the laser photoelectric switch receiver 10 is connected to the signal input terminal of the normally closed intermediate relay 14 and controls the opening and closing of the contacts of the normally closed intermediate relay 14.

[0029] When the operator holds the terminal and places it on the base 2 below the crimping head 7, if the operator's hand is within the crimping range of the crimping head 7, the laser photoelectric switch receiver 10 cannot receive the signal from the laser photoelectric switch transmitter 9. Its signal output will then transmit the signal to the normally closed intermediate relay 14, which will disconnect the circuit of the foot switch 11. In this case, even if the foot switch 11 is pressed, the crimping machine main unit 4 cannot be opened, and the reciprocating motor 5 of the crimping machine will not drive the crimping head 7 downwards, thus protecting the operator's safety. When the operator's hand is outside the crimping range of the crimping head 7, the laser photoelectric switch receiver 10 can receive the signal from the laser photoelectric switch transmitter 9. Its signal output will then transmit the signal to the normally closed intermediate relay 14, which will connect the circuit of the foot switch 11. When the foot switch 11 is pressed, the crimping machine main unit 4 opens, the reciprocating motor of the crimping machine drives the crimping head downwards, and the crimping machine operates normally, completing the crimping operation.

[0030] The safety protection device of the terminal crimping machine also includes a low-voltage DC power supply 15, and the power inputs of the laser photoelectric switch transmitter 9 and the laser photoelectric switch receiver 10 are respectively connected in parallel with the positive and negative terminals of the low-voltage DC power supply 15.

[0031] It uses a low-voltage DC power supply (15), which is stable and reliable.

[0032] The safety protection device of the terminal crimping machine also includes an audible and visual alarm device 13. The signal output terminal of the laser photoelectric switch receiver 10 is connected to the signal input terminal of the normally closed intermediate relay 14. The signal output terminal of the normally closed intermediate relay 14 controls the switching of the audible and visual alarm device 13. The power supply for the audible and visual alarm device 13 is provided by a low-voltage DC power supply 15.

[0033] The normally closed intermediate relay 14 has two outputs: one controls the foot switch 11, and the other controls the audible and visual alarm device 13.

[0034] When the laser photoelectric switch receiver 10 does not receive the signal from the laser photoelectric switch transmitter 9, its signal output terminal controls the normally closed intermediate relay 14 to open the audible and visual alarm device 13, reminding the operator to pay attention to safety.

[0035] like Figure 4 As shown, the front and rear ends of the crimping machine base 2 are respectively provided with horizontal guide rails 17, and movable columns 18 are provided on the horizontal guide rails 17. The columns 18 are set perpendicular to the crimping machine base 2. Vertical guide rails 19 are respectively provided on the opposite side walls of the two columns 18. The laser photoelectric switch transmitter 9 and the laser photoelectric switch receiver 10 are respectively movably set on the vertical guide rails 19.

[0036] Since the crimping machine needs to crimp terminals and wires of different types, the positions of the laser photoelectric switch transmitter 9 and the laser photoelectric switch receiver 10 can be adjusted according to the size of the terminal so that the laser photoelectric switch cannot detect the terminal but can detect the finger that has entered the danger zone.

[0037] like Figure 5 As shown, the horizontal guide rail 17 has a trapezoidal cross section, and the lower end of the column 18 is provided with two parallel pressing parts 20 at intervals. The lower end of the pressing part 20 is provided with a buckle 16 that matches the cross section of the horizontal guide rail 17, and the two buckles 16 are spaced apart.

[0038] The vertical guide rail 19 has a trapezoidal cross-section. The lower ends of the laser photoelectric switch transmitter 9 and the laser photoelectric switch receiver 10 are respectively provided with two parallel pressing parts 20. The lower ends of the pressing parts 20 are respectively provided with buckles 16 that cooperate with the cross-section of the vertical guide rail 19. The two buckles 16 are spaced apart.

[0039] In use, press the two parallel pressing parts 20, and the two latches 16 will move closer to each other, allowing them to move within the horizontal guide rail 17 or the vertical guide rail 19. When moved to the desired fixed position, release the pressing parts 20, and the two latches 16 will engage with the horizontal guide rail 17 or the vertical guide rail 19, fixing the positions of the laser photoelectric switch transmitter 9 and the laser photoelectric switch receiver 10.

[0040] Furthermore, the laser photoelectric switch transmitter 9, the laser photoelectric switch receiver 10, and one side of the crimping head 7 are on the same straight line.

[0041] The crimping machine includes a worktable 1, a base 2, support side plates 3, a main unit 4, and a reciprocating motor 5. The base 2 is placed on the worktable. The two support side plates 3 are respectively vertically arranged on both sides of the rear end of the base 2. The reciprocating motor 5 and the main unit 4 are arranged at the upper end of the support side plates 3. The motor shaft 6 is arranged at the lower end of the reciprocating motor 5. The crimping cutter head 7 is arranged at the lower end of the motor shaft 6.

[0042] A back baffle 8 is vertically mounted in the middle of the base 2, and the back baffle 8 is perpendicular to the side plate 3 of the bracket. The back baffle 8 can increase the stability of the crimping machine.

[0043] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A safety protection device for a terminal crimping machine, characterized in that: The crimping machine includes a laser photoelectric switch transmitter, a laser photoelectric switch receiver, and a normally closed intermediate relay. The crimping machine is mounted on a workbench, with a foot switch underneath. The laser photoelectric switch transmitter and receiver are located at the front and rear ends of the crimping machine base, respectively. The signal output of the laser photoelectric switch receiver is connected to the signal input of the normally closed intermediate relay to control its opening and closing. The signal output of the normally closed intermediate relay is connected in series with the foot switch to jointly control the operation of the crimping machine.

2. The safety protection device for a terminal crimping machine according to claim 1, characterized in that: The safety protection device of the terminal crimping machine also includes a low-voltage DC power supply to provide power to the laser photoelectric switch transmitter and receiver.

3. The safety protection device for a terminal crimping machine according to claim 1, characterized in that: The safety protection device of the terminal crimping machine includes a normally closed intermediate relay. The signal output terminal of the normally closed intermediate relay is connected in series with the foot pedal circuit to control the crimping machine.

4. The safety protection device for a terminal crimping machine according to claim 2, characterized in that: The safety protection device of the terminal crimping machine also includes an audible and visual alarm device, which is powered by a low-voltage DC power supply and controlled by the signal output terminal of a normally closed intermediate relay.

5. A safety protection device for a terminal crimping machine according to any one of claims 1-4, characterized in that: The front and rear ends of the crimping machine base are respectively equipped with horizontal guide rails, and the horizontal guide rails are movably equipped with columns. The columns are set perpendicular to the crimping machine base. The opposite side walls of the two columns are respectively equipped with vertical guide rails. The laser photoelectric switch transmitter and the laser photoelectric switch receiver are respectively movably mounted on the vertical guide rails.

6. A safety protection device for a terminal crimping machine according to claim 5, characterized in that: The horizontal guide rail has a trapezoidal cross-section, and the lower end of the column is provided with two parallel pressing parts at intervals. The lower end of each pressing part is provided with a buckle that matches the cross-section of the horizontal guide rail, and the two buckles are spaced apart.

7. A safety protection device for a terminal crimping machine according to claim 5, characterized in that: The vertical guide rail has a trapezoidal cross-section. The lower ends of the laser photoelectric switch transmitter and receiver are respectively provided with two parallel pressing parts. The lower ends of the pressing parts are respectively provided with buckles that match the cross-section of the vertical guide rail, and the two buckles are spaced apart.

8. The safety protection device for a terminal crimping machine according to claim 1, characterized in that: The crimping machine includes a worktable, a base, support side plates, a main unit, and a reciprocating motor. The base is set on the worktable, and the two support side plates are respectively vertically set on both sides of the rear end of the base. The reciprocating motor and the main unit are set on the upper end of the support side plates, and the motor shaft is set on the lower end of the reciprocating motor. The crimping cutter head is set on the lower end of the motor shaft.

Images