Device for testing tensile force of household appliance wire harness in high-temperature environment

Abstract

The utility model relates to the technical field of wire harness testing, in particular to a household appliance wire harness high-temperature environment tension testing device which comprises a machine frame and fixing frames, displacement mechanisms are symmetrically arranged in the machine frame, the fixing frames are symmetrically arranged in the machine frame in a sliding mode, and a pressure limiting mechanism is arranged at one end, located outside the machine frame, of each fixing frame. A supporting plate is arranged on the side face of the pressure limiting mechanism, a clamping mechanism is arranged in the supporting plate, the displacement mechanism comprises a double-head motor and first lead screws, the double-head motor is arranged in the center of the rack, the first lead screws are arranged on the two sides of the double-head motor respectively, and fixing frames are in threaded connection with the outer sides of the first lead screws. When the device is used, the wire harness is heated, so that the temperature of the wire harness reaches a fixed temperature, then the wire harness is clamped through the clamping rods, the contact area with the wire harness is increased through the tooth blocks in the clamping process, and then the clamping effect of the device is improved.

Description

Technical Field

[0001] This utility model relates to the field of wire harness testing technology, and in particular to a high-temperature environment tensile testing device for household wire harnesses. Background Technology

[0002] Home appliances need to use wiring harnesses to connect to external power sources. During use, these wiring harnesses are inevitably subjected to compression and pulling. Therefore, during the production of wiring harnesses, it is necessary to test their tensile strength to prevent deformation caused by external forces during operation, which could prevent the device from functioning properly. However, general tensile testing devices cannot effectively clamp the wiring harness and thus cannot provide sufficient tensile force, making it difficult to test the wiring harness. Utility Model Content

[0003] The purpose of this invention is to provide a high-temperature tensile testing device for household electrical wiring harnesses to solve the problems mentioned in the background art.

[0004] A high-temperature tensile testing device for household electrical wire harnesses includes a frame and a fixed frame: a displacement mechanism is symmetrically arranged inside the frame, a fixed frame is symmetrically slidably arranged inside the frame, a pressure limiting mechanism is provided at one end of the fixed frame located outside the frame, a support plate is provided on the side of the pressure limiting mechanism, and a clamping mechanism is provided inside the support plate.

[0005] Preferably, the displacement mechanism includes a dual-head motor and a first lead screw. The dual-head motor is located at the center of the frame, and the first lead screw is located on both sides of the dual-head motor. A fixing frame is threaded to the outer side of the first lead screw.

[0006] When the device is in use, the first lead screw is driven to rotate by a dual-head motor. When the first lead screw rotates, since the first lead screw and the fixed frame are connected by a thread, and the frame limits the fixed frame, it will drive the fixed frames on both sides to move inward or outward at the same time. When the fixed frame moves outward, it will pull the wire harness, thereby testing the tensile force of the wire harness.

[0007] Preferably, fixed covers are embedded on both sides of the frame, and a rotating shaft is provided inside the fixed cover, with the first lead screw embedded inside the rotating shaft.

[0008] When the device is in use, the two sides of the frame are sealed by the fixed cover, and the first lead screw is supported by the rotating shaft, which is rotatably connected to the fixed cover.

[0009] Preferably, the pressure limiting mechanism includes a fixed column, a first electrode, and a fixed spring. The fixed column is slidably disposed inside the fixed frame. One end of the fixed column inside the fixed frame is a second electrode, and a support plate is disposed at the other end of the fixed column outside the fixed frame. The first electrode is disposed on the inner side of the fixed frame, and a fixed spring is disposed on the outer side of the fixed column. The fixed spring is located inside the fixed frame, and a warning light is disposed on the side of the fixed column.

[0010] When the mounting bracket moves outward, the support plate is subjected to a force from the wiring harness, causing the support plate and the mounting bracket to move relative to each other. As the tension increases, the relative movement length between the support plate and the mounting bracket also increases. When the second electrode inside the mounting column contacts the first electrode, the first electrode contacts the external power source. When the second electrode contacts the first electrode, the warning light is energized, which alerts external personnel that the tension test has passed.

[0011] Preferably, the clamping mechanism includes a second lead screw and a clamping rod. The second lead screw is rotatably disposed inside the support plate. The upper and lower threads of the second lead screw are in opposite directions. The clamping rod is symmetrically threaded on the outer side of the second lead screw. The clamping rod is slidably disposed inside the support plate.

[0012] The heated high-temperature wire harness is placed between the clamping rods, and then the clamping rods are moved by the second lead screw to clamp the high-temperature wire harness. The tension of the wire harness is then tested.

[0013] Preferably, toothed blocks are provided on the opposing sides of the two clamping rods.

[0014] The toothed blocks can increase the clamping force of the clamping rod on the wire harness, preventing the wire harness from becoming loose.

[0015] Preferably, a worm gear is connected to the side of the second lead screw, and a worm is connected to the side of the worm gear, the worm being rotatably disposed inside the support plate.

[0016] When the device is in use, the worm gear drives the worm wheel to rotate, and when the worm wheel rotates, the second lead screw rotates accordingly, thereby clamping the wire harness.

[0017] The beneficial effects of this utility model are:

[0018] 1. When the device is in use, the wire harness is heated to a fixed temperature, and then the wire harness is clamped by the clamping rod. During the clamping process, the toothed blocks increase the contact area with the wire harness, thereby improving the clamping effect of the device.

[0019] 2. When testing the tensile strength, the tension on the wire harness can be slowly increased by fixing the spring. After the first electrode and the second electrode come into contact, an indicator light will be used to indicate that the test has passed. At this time, the relative position of the support plate and the frame can be used to determine whether the wire harness has been stretched. Attached Figure Description

[0020] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0021] Figure 1 This is a schematic diagram of the overall front sectional structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the internal side view of the frame structure of this utility model;

[0023] Figure 3 This is a schematic diagram of the internal structure of the fixing frame of this utility model;

[0024] Figure 4 This is a side sectional view of the support plate of this utility model.

[0025] In the diagram: 1. Frame; 2. Dual-head motor; 3. First lead screw; 4. Fixed cover; 5. Fixed frame; 6. Fixed column; 7. First electrode; 8. Fixed spring; 9. Warning light; 10. Support plate; 11. Worm gear; 12. Worm wheel; 13. Second lead screw; 14. Clamping rod; 15. Tooth block. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] In practical implementation: such as Figure 1-4 As shown, a high-temperature environment tensile testing device for household wire harnesses includes a frame 1 and a fixed frame 5. A displacement mechanism is symmetrically arranged inside the frame 1, and a fixed frame 5 is symmetrically slidably arranged inside the frame 1. A pressure limiting mechanism is provided at one end of the fixed frame 5 located outside the frame 1. A support plate 10 is provided on the side of the pressure limiting mechanism, and a clamping mechanism is provided inside the support plate 10.

[0028] The displacement mechanism includes a dual-head motor 2 and a first lead screw 3. The dual-head motor 2 is located at the center of the frame 1, and the first lead screw 3 is located on both sides of the dual-head motor 2. The outer side of the first lead screw 3 is threadedly connected to a fixing frame 5.

[0029] When the device is in use, the first lead screw 3 is driven to rotate by the dual-head motor 2. When the first lead screw 3 rotates, since the first lead screw 3 and the fixed frame 5 are connected by threads, and the frame 1 will limit the fixed frame 5, it will drive the fixed frames 5 on both sides to move inward or outward at the same time. When the fixed frame 5 moves outward, it will pull the wire harness, thereby testing the tension of the wire harness.

[0030] The frame 1 has fixed covers 4 embedded on both sides. The fixed covers 4 have a rotating shaft inside, and the first lead screw 3 is embedded inside the rotating shaft.

[0031] When the device is in use, the two sides of the frame 1 are sealed by the fixed cover 4, and the first lead screw 3 is supported by the rotating shaft. The rotating shaft and the fixed cover 4 are rotatably connected.

[0032] The pressure limiting mechanism includes a fixed column 6, a first electrode 7, and a fixed spring 8. The fixed column 6 is slidably arranged inside the fixed frame 5. The end of the fixed column 6 inside the fixed frame 5 is the second electrode, and the end of the fixed column 6 outside the fixed frame 5 is provided with a support plate 10. The first electrode 7 is provided on the inner side of the fixed frame 5, and the fixed spring 8 is provided on the outer side of the fixed column 6. The fixed spring 8 is located inside the fixed frame 5, and a warning light 9 is provided on the side of the fixed column 6.

[0033] When the fixing frame 5 moves outward, the support plate 10 will be subjected to the force from the wire harness, which will cause the support plate 10 and the fixing frame 5 to move relative to each other. As the tension increases, the relative movement length between the support plate 10 and the fixing frame 5 will also increase. When the second electrode and the first electrode 7 inside the fixing column 6 come into contact, the first electrode 7 comes into contact with the external power source. When the second electrode and the first electrode 7 come into contact, the warning light 9 is energized, which means that the external personnel are reminded that the tension test has passed.

[0034] The clamping mechanism includes a second lead screw 13 and a clamping rod 14. The second lead screw 13 is rotatably disposed inside the support plate 10. The upper and lower threads of the second lead screw 13 are opposite in direction. The clamping rod 14 is symmetrically threaded on the outer side of the second lead screw 13. The clamping rod 14 is slidably disposed inside the support plate 10.

[0035] The heated high-temperature wire harness is placed between the clamping rods 14, and then the clamping rods 14 are moved by the second lead screw 13 to clamp the high-temperature wire harness. The tension of the wire harness is then tested.

[0036] Toothed blocks 15 are provided on the opposing sides of the two clamping rods 14.

[0037] The toothed block 15 can increase the clamping force of the clamping rod 14 on the wire harness, thus preventing the wire harness from becoming loose.

[0038] The second lead screw 13 is connected to a worm gear 12 on its side, and a worm 11 is connected to the side of the worm gear 12. The worm 11 is rotatably disposed inside the support plate 10.

[0039] When the device is in use, the worm gear 11 drives the worm wheel 12 to rotate, and when the worm wheel 12 rotates, the second lead screw 13 rotates accordingly, thereby clamping the wire harness.

[0040] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0041] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A device for testing the tensile strength of household electrical wire harnesses in a high-temperature environment, characterized in that, Includes a frame (1) and a fixed frame (5): The frame (1) is symmetrically provided with a displacement mechanism inside, and the fixed frame (5) is symmetrically slidably provided inside the frame (1). The fixed frame (5) is provided with a pressure limiting mechanism at one end outside the frame (1). The side of the pressure limiting mechanism is provided with a support plate (10), and the inside of the support plate (10) is provided with a clamping mechanism.

2. The high-temperature tensile testing device for household electrical wire harnesses according to claim 1, characterized in that: The displacement mechanism includes a dual-head motor (2) and a first lead screw (3). The dual-head motor (2) is located at the center of the frame (1). The first lead screw (3) is located on both sides of the dual-head motor (2). The outer side of the first lead screw (3) is threaded with a fixing frame (5).

3. The high-temperature environment tensile testing device for household electrical wire harnesses according to claim 2, characterized in that: The frame (1) has fixed covers (4) embedded on both sides. The fixed covers (4) have a rotating shaft inside, and the first lead screw (3) is embedded inside the rotating shaft.

4. The high-temperature tensile testing device for household electrical wire harnesses according to claim 1, characterized in that: The pressure limiting mechanism includes a fixed column (6), a first electrode (7), and a fixed spring (8). The fixed column (6) is slidably arranged inside the fixed frame (5). One end of the fixed column (6) inside the fixed frame (5) is the second electrode, and the other end of the fixed column (6) outside the fixed frame (5) is provided with a support plate (10). The first electrode (7) is provided on the inner side of the fixed frame (5), and the fixed spring (8) is provided on the outer side of the fixed column (6). The fixed spring (8) is located inside the fixed frame (5), and a warning light (9) is provided on the side of the fixed column (6).

5. The high-temperature tensile testing device for household electrical wire harnesses according to claim 1, characterized in that: The clamping mechanism includes a second lead screw (13) and a clamping rod (14). The second lead screw (13) is rotatably disposed inside the support plate (10). The upper and lower threads of the second lead screw (13) are opposite in direction. The clamping rod (14) is symmetrically threaded on the outer side of the second lead screw (13). The clamping rod (14) is slidably disposed inside the support plate (10).

6. The high-temperature tensile testing device for household electrical wire harnesses according to claim 5, characterized in that: The two clamping rods (14) are provided with toothed blocks (15) on their opposing sides.

7. The high-temperature environment tensile testing device for household electrical wire harnesses according to claim 5, characterized in that: The second lead screw (13) is connected to a worm wheel (12) on its side, and a worm (11) is connected to the side of the worm wheel (12). The worm (11) is rotatably disposed inside the support plate (10).

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