Automobile wire low-temperature impact test device

Abstract

The utility model discloses an automobile wire low-temperature impact test device which comprises a low-temperature box, a bottom plate located at the bottom of the low-temperature box and a connecting plate located at the top of the low-temperature box are arranged in the low-temperature box, the bottom plate is connected with the connecting plate through a stand column, an adjusting plate is arranged between the bottom plate and the connecting plate, and the adjusting plate is connected with the stand column. The testing device further comprises a plurality of impact units, each impact unit comprises a guide rod, a drop hammer arranged on the guide rod in a sleeving mode and an impact anvil connected to the bottom end of the guide rod, and the guide rods are located between the bottom plate and the connecting plate and penetrate through the adjusting plate. The drop hammer comprises a main body and a lap joint part which is connected to the upper end of the main body and is matched with the locker, so that the drop hammer is locked or unlocked by the locker at a specified height. The device is ingenious in structural design, convenient to operate and capable of ensuring that the test is safely, reliably and effectively completed.

Description

Technical Field

[0001] The utility model relates to the technical field of test devices, in particular to a low-temperature impact test device for electric wires. Background Art

[0002] With the rapid development of the automobile industry and the improvement of people's living standards, cars are gradually becoming people's means of transportation. In addition to appearance and comfort, safety is an especially important consideration in the selection of cars. Cars use electricity for starting, lighting, air conditioning, etc., and the power supply of electrical equipment is inseparable from wires. The use environment of cars is often harsh. The quality of automotive wires directly affects the safety performance of the car. Therefore, it is necessary to measure the various properties of samples (wires) during the automobile manufacturing process, such as low temperature impact in low temperature resistance, so as to determine the quality of automotive wires. At present, the equipment that can do this kind of test is imported equipment, which is expensive and has high maintenance and servicing costs.

[0003] Therefore, there is an urgent need to design a low-cost, accurate and reliable, and more efficient automotive wire low-temperature impact test device. Utility Model Content

[0004] In view of the above-mentioned deficiencies of the current low-temperature impact test device for automobile wires, the utility model provides a low-temperature impact test device for automobile wires, which can ensure the safety and reliability of the test and has high test efficiency.

[0005] In order to achieve the above object, the embodiment of the utility model adopts the following technical solution:

[0006] A low-temperature impact test device for automobile wires, comprising a low-temperature box, wherein a base plate located at the bottom of the low-temperature box and a connecting plate located at the top of the low-temperature box are provided in the low-temperature box, wherein the base plate and the connecting plate are connected via a column, an adjusting plate is provided between the base plate and the connecting plate, the adjusting plate is connected to the column, a locking device is provided on the adjusting plate, and the test device further comprises a plurality of impact units, wherein the impact units comprise a guide rod, a drop hammer sleeved on the guide rod, and an impact anvil connected to the bottom end of the guide rod, wherein the guide rod is located between the base plate and the connecting plate and passes through the adjusting plate, and the drop hammer comprises a main body and a lap portion connected to the upper end of the main body and cooperating with the locking device, so that the drop hammer is locked or unlocked by the locking device at a specified height.

[0007] According to one aspect of the utility model, the locker includes a mounting seat and a locking part connected to the mounting seat through a rotating shaft, the mounting seat is arranged on the adjustment plate, and the locking part includes a limiting member for supporting a drop hammer and a push-pull member connected to the limiting member.

[0008] According to one aspect of the utility model, the edge of the limiting member overlaps with the edge of the overlapping portion.

[0009] According to one aspect of the utility model, a ball head is provided at the bottom end of the guide rod, and the ball head is connected to the lower end of the impact anvil. The lower end of the impact anvil is provided with a groove matching the ball head, and the lowermost end of the ball head contacts the sample.

[0010] According to one aspect of the utility model, the connecting plate and the adjusting plate are provided with mounting holes matching the connecting rod, and the connecting rod is connected in the mounting holes.

[0011] According to one aspect of the utility model, a shock-absorbing pad is provided between the bottom plate and the low-temperature box.

[0012] According to one aspect of the utility model, the upper end of the column is a stepped cylinder, including a first cylinder located at the top and a second cylinder connected to the first cylinder, the diameter of the first cylinder is smaller than the diameter of the second cylinder, the first cylinder is used to install fasteners, and the connecting plate is connected to the second cylinder.

[0013] According to one aspect of the utility model, a locking hand wheel for fixing the adjusting plate is provided on the adjusting plate.

[0014] According to one aspect of the utility model, the guide rod includes a connecting rod located between the connecting plate and the adjusting plate and a guide rod located between the adjusting plates, the connecting rod is cylindrical, and the guide rod is triangular prism-shaped.

[0015] According to one aspect of the utility model, a through hole is provided in the drop hammer, and the side edge of the guide rod abuts against the hole wall of the through hole.

[0016] The advantages of the implementation of the utility model are as follows: the drop hammer is locked or unlocked by a locking device, so that the drop hammer falls freely at a specified height, driving the impact anvil on the guide rod to impact the sample, and the operation is simple, safe and reliable; the utility model is provided with multiple impact units, and multiple samples can be tested at the same time, and the test efficiency is high; through the triangular prism-shaped guide rod, the contact mode between the guide rod and the drop hammer through hole is line contact, which effectively reduces the friction between the drop hammer and the guide rod, and then the drop hammer is infinitely close to a free fall when falling, so that the test result is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a structural decomposition schematic diagram of the utility model;

[0019] Figure 2A structural schematic diagram of the utility model;

[0020] Figure 3 It is a left side view of the utility model;

[0021] Figure 4 The utility model is a structural schematic diagram of the guide rod.

[0022] 1. Shock-absorbing pad; 2. Bottom plate; 3. Column; 4. Adjustment plate; 5. Connecting plate; 6. Retaining ring; 7. Screw; 8. Locking handwheel; 9. Guide rod; 91. Connecting rod; 92. Guide rod; 10. Locker; 101. Push-pull member; 102. Limiting member; 11. Drop hammer; 111. Main body; 112. Overlapping part; 12. Impact anvil; 13. Sample. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] The utility model aims to verify whether the cable can withstand impact without cracking or deformation and maintain insulation performance at low temperature.

[0025]

[0026] The mass of the drop weight is selected as shown in the table above.

[0027] Embodiment 1:

[0028] In this embodiment, the nominal cross-sectional area of ​​the conductor is selected as: 0.35<a≦2.5, and the mass of the drop weight 11 is selected as 100g.

[0029] like Figure 1 , 2As shown in Figures 3 and 4, a low-temperature impact test device for automotive wires comprises a low-temperature box, wherein a base plate 2 located at the bottom of the low-temperature box and a connecting plate 5 located at the top of the low-temperature box are provided in the low-temperature box, an adjusting plate 4 is provided between the base plate 2 and the connecting plate 5, the base plate 2 and the connecting plate 5 are connected by a column 3, an adjusting plate 4 is provided between the base plate 2 and the connecting plate 5, a locking device 10 is provided on the adjusting plate 4, the test device further comprises a plurality of impact units, the impact units comprise a guide rod 9, a drop hammer 11 sleeved on the guide rod 9 and an impact anvil 12 connected to the bottom end of the guide rod 9, the drop hammer 11 comprises a main body 111 and a lap joint 112 connected to the upper end of the main body 111 and cooperating with the locking device 10, so that the drop hammer 11 is locked or unlocked by the locking device 10 at a specified height.

[0030] In this embodiment, the outer diameter of the impact anvil 12 is 20 mm, and the radius of the ball head is 300 mm.

[0031] The method of using the utility model is as follows: during the test, the test device and several samples 13 are placed in a low-temperature test box, the bottom plate 2 of the test device is pressed directly above the shock-absorbing pad 1, and the test parameters are set on the low-temperature test box: temperature (-15±2)℃, insulation time (4h), and then the test is started. When the sample 13 reaches the insulation time at the specified freezing temperature, a sample 13 parallel to the bottom plate 2 of the test device is placed under each impact unit, the top of the ball head of the impact anvil 12 is placed in the middle of the sample 13, the top of the ball head of the guide rod 9 is in contact with the spherical groove of the impact anvil 12, and the locking hand wheel 8 is tightened to lock the guide rod 9; the distance from the lower end face of the drop hammer 11 to the upper end face of the impact anvil 12 is adjusted to a specified height, and then the locker 10 is released to let the drop hammer 11 fall freely, and at the same time, several samples 13 are impacted once. After the impact, the sample 13 is returned to RT (room temperature) to observe whether the conductor is exposed; then a withstand voltage test is carried out to check whether the sample 13 (wire) is broken down, thereby realizing the test of the automotive wires.

[0032] In practical applications, the locking device 10 includes a mounting seat and a locking portion connected to the mounting seat via a rotating shaft, the mounting seat is arranged on the adjustment plate 4, and the locking portion includes a limiter 102 for supporting the drop weight 11 and a push-pull member 101 connected to the limiter 102. The locking or releasing of the locking device 10 is controlled by the push-pull member 101, the locking device 10 is released when pushed upward, and the locking device 10 locks the drop weight 11 when pulled downward.

[0033] In actual application, the edge of the stopper 102 overlaps the edge of the overlap portion 112. When in use, the push-pull member 101 is pushed upward to make the overlap portion 112 away from the stopper 102. Since the edge of the stopper 102 overlaps the edge of the overlap portion 112, the drop weight 11 falls freely and quickly, which is convenient and quick to use and improves the accuracy of the test.

[0034] In this embodiment, the longitudinal section of the limiting member 102 is a right-angled trapezoid, and the edge length of the upper surface of the limiting member 102 is greater than the edge length of the lower surface.

[0035] In this embodiment, the push-pull member 101 is in an "L" shape, including a connecting rod 91 and a push-pull rod connected to the stopper 102, and the connecting rod 91 and the push-pull rod are inclined at an obtuse angle. By forming an inclination, it is easier to push and pull.

[0036] In practical applications, a ball head is provided at the bottom end of the guide rod 9 , and the ball head is connected to the lower end of the impact anvil 12 . The lower end of the impact anvil 12 is provided with a groove matching the ball head, and the lowermost end of the ball head contacts the sample 13 .

[0037] In this embodiment, mounting holes are provided on the bottom plate 2 and the connecting plate 5 , and one end of the column 3 is fixed to the mounting hole of the bottom plate 2 by means of a retaining ring 6 and a screw 7 , and the other end is fixed to the connecting plate 5 .

[0038] In this embodiment, two mounting holes for the columns 3 and two step holes for mounting the retaining rings 6 are provided on the bottom plate 2. The bottom plate 2 is made of steel and weighs 10 kg.

[0039] In this embodiment, the connecting plate 5 is provided with two inner holes, which respectively match the outer diameters of the shaft ends of the two columns 3 .

[0040] The drop weight 11 and the impact anvil 12 are precisely machined, and their weights are verified by metrology.

[0041] In practical applications, a shock-absorbing pad 1 is provided between the bottom plate 2 and the low-temperature box. The shock-absorbing pad 1 plays an anti-slip and shock-absorbing role.

[0042] In this embodiment, the shock absorbing pad 1 is made of foam rubber and has a thickness of 50 mm.

[0043] In practical applications, the upper end of the column 3 is a stepped cylinder, including a first cylinder at the top and a second cylinder connected to the first cylinder, the diameter of the first cylinder is smaller than the diameter of the second cylinder, the first cylinder is used to install fasteners, and the connecting plate 5 is connected to the second cylinder. It is convenient to load and unload the connecting plate 6.

[0044] In practical application, a locking hand wheel 8 for fixing the guide rod 9 is provided on the connecting plate 5. The guide rod 9 is fixed by the locking hand wheel 8.

[0045] In practical application, a locking hand wheel 8 for fixing the adjusting plate 4 is provided on the adjusting plate 4. By locking with the column 3, the adjusting plate 4 is fixed. The height of the adjusting plate 4 is adjusted by the locking hand wheel 8 on the adjusting plate 4.

[0046] In this embodiment, the locking handwheel 8 for fixing the guide rod 9 is arranged at the front side or the rear side of the connecting plate 5, and the locking handwheel 8 for fixing the adjusting plate 4 is respectively installed at the left and right sides of the connecting plate 5. The locking handwheel 8 is arranged in different directions for easy operation by the user.

[0047] In practical applications, the guide rod 9 includes a connecting rod 91 located between the connecting plate 5 and the adjusting plate 4 and a guide rod 92 located between the adjusting plates 4 and 4. The connecting rod 91 is cylindrical and the guide rod 92 is triangular prism-shaped. The connecting plate 5 and the adjusting plate 4 are fixed by the connecting rod 91, and the sliding of the drop weight 11 is facilitated by the guide rod 92, so that the test result is more accurate.

[0048] In actual application, a through hole is provided in the drop weight 11, and the side edge of the guide rod 92 abuts against the hole wall of the through hole. The guide rod 92 is in the shape of a triangular prism, so that the contact mode between the guide rod 92 and the through hole in the drop weight 11 is line contact, which effectively reduces friction, and thus makes the drop weight 11 infinitely close to free fall when falling.

[0049] In this embodiment, the diameter of the through hole in the drop weight 11 is 10.5 mm, and the side length of the triangular prism is 8.6 mm.

[0050] In practical applications, the connecting plate 5 and the adjusting plate 4 are provided with mounting holes matching the connecting rod 91 , and the connecting rod 91 is connected in the mounting holes.

[0051] In this embodiment, the drop weight 11 is made of steel.

[0052] In this embodiment, the distance from the lower end of the drop hammer 11 to the upper end of the impact anvil 12 is 100 mm.

[0053] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model shall be based on the protection scope of the claims.

Claims

1. A low temperature impact test device for automobile electric wires, comprising a low temperature box, wherein a bottom plate (2) located at the bottom of the low temperature box and a connecting plate (5) located at the top of the low temperature box are provided in the low temperature box, wherein the bottom plate (2) and the connecting plate (5) are connected via a column (3), an adjusting plate (4) is provided between the bottom plate (2) and the connecting plate (5), and the adjusting plate (4) is connected to the column (3), wherein: The adjusting plate (4) is provided with a locker (10). The test device also includes a plurality of impact units, the impact units including a guide rod (9), a drop hammer (11) sleeved on the guide rod (9) and an impact anvil (12) connected to the bottom end of the guide rod (9). The guide rod (9) is located between the bottom plate (2) and the connecting plate (5) and passes through the adjusting plate (4). The drop hammer (11) includes a main body (111) and an overlapped portion (112) connected to the upper end of the main body (111) and cooperating with the locker (10), so that the drop hammer (11) is locked or unlocked by the locker (10) at a specified height.

2. The low temperature impact test device for automobile wires according to claim 1, characterized in that: The locker (10) comprises a mounting seat and a locking portion connected to the mounting seat via a rotating shaft, the mounting seat is arranged on an adjustment plate (4), and the locking portion comprises a limiting member (102) for supporting a drop weight (11) and a push-pull member (101) connected to the limiting member (102).

3. The low temperature impact test device for automobile wires according to claim 2, characterized in that: The edge of the limiting member (102) overlaps with the edge of the overlapping portion (112).

4. The low temperature impact test device for automobile wires according to claim 1, characterized in that: The bottom end of the guide rod (9) is provided with a ball head, which is connected to the lower end of the impact anvil (12). The lower end of the impact anvil (12) is provided with a groove matching the ball head, and the lowermost end of the ball head is in contact with the sample (13).

5. The low temperature impact test device for automobile wires according to claim 1, characterized in that: The connecting plate (5) and the adjusting plate (4) are provided with mounting holes for matching the connecting rod (91), and the connecting rod (91) is connected in the mounting holes.

6. The low temperature impact test device for automobile wires according to claim 1, characterized in that: A shock-absorbing pad (1) is provided between the bottom plate (2) and the low-temperature box.

7. The low temperature impact test device for automobile wires according to claim 1, characterized in that: The upper end of the column (3) is a stepped cylinder, comprising a first cylinder located at the top and a second cylinder connected to the first cylinder, the diameter of the first cylinder is smaller than the diameter of the second cylinder, the first cylinder is used to install a fastener, and the connecting plate (5) is connected to the second cylinder.

8. The low temperature impact test device for automobile wires according to claim 1, characterized in that: A locking hand wheel (8) for fixing the adjusting plate (4) is provided on the adjusting plate (4).

9. A low temperature impact test device for automotive electric wires according to any one of claims 1 to 8, characterized in that: The guide rod (9) comprises a connecting rod (91) located between the connecting plate (5) and the adjusting plate (4) and a guide rod (92) located between the adjusting plates (4) and the adjusting plates (4); the connecting rod (91) is cylindrical and the guide rod (92) is triangular prism-shaped.

10. The low temperature impact test device for automobile electric wires according to claim 9, characterized in that: A through hole is provided in the drop hammer (11), and the side edge of the guide rod (92) abuts against the hole wall of the through hole.

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