CN209802609U - Clamp for detecting three-phase power connecting line of electric automobile - Google Patents

Abstract

The utility model discloses a clamp for detecting an electric automobile three-phase power connecting wire, which comprises a pressing device for pressing a workpiece and a lower clamp matched with the pressing device to clamp the workpiece, wherein the lower clamp is provided with an accommodating cavity for detecting the tightness of the workpiece, the bottom of the accommodating cavity is provided with an air inlet pipe communicated with an air tightness tester, and the air inlet pipe is arranged on the side surface of the lower clamp; the pressing device comprises a fixed frame body, a movable pressing rod and a wrench for driving the pressing rod to move, and the pressing rod is hinged with the wrench through a hinge plate assembly so as to enable the pressing rod to slide back and forth on the fixed frame body; the utility model discloses a depression bar moves down and compresses tightly the work piece under the control of spanner, thereby the gas tightness tester adopts the pressure drop method to go to detect whether leak gas and learn the leakproofness of work piece in holding the chamber, and it not only has simple structure, easily operation, easy maintenance, advantage such as with low costs, has still improved the efficiency that detects electric automobile three-phase power connecting wire gas tightness.

Description

Clamp for detecting three-phase power connecting line of electric automobile

Technical Field

the utility model relates to an anchor clamps for detecting electric automobile three-phase power connecting wire.

Background

The existing three-phase power connecting wire of the electric automobile is required to meet the inspection standard of IP67, and the standard of IP67 refers to the protection safety level. IP is an abbreviation for Ingress Protection Rating (or International Protection) that defines the Protection of an interface against liquid and solid particles. The IP is followed by 2 digits, the 1 st is a solid protection grade, the range is 0-6, and the protection from large-particle foreign matters to dust is respectively represented; the 2 nd is the liquid protection level, ranging from 0 to 8, which respectively represents protection against pressure from vertical drops to the bottom of the water. Larger numbers indicate greater power. IP67 is explained as protection against dust ingestion (overall protection against contact, protection against dust penetration); and (4) short-time soaking (preventing soaking) during protection. However, the three-phase power connecting line of the electric automobile is generally directly assembled on the automobile without detecting the sealing performance when the production is finished, and the sealing performance is hidden. Therefore, it is urgent to develop a device for detecting a three-phase power connection line of an electric vehicle.

Disclosure of Invention

The to-be-solved technical problem of the utility model is to provide an anchor clamps for detecting electric automobile three-phase power connecting wire to solve the not enough that exists among the prior art.

In order to solve the technical problem, the utility model discloses a technical scheme does: a clamp for detecting a three-phase power connecting wire of an electric automobile comprises a pressing device for pressing a workpiece and a lower clamp matched with the pressing device to clamp the workpiece, wherein a containing cavity for detecting the tightness of the workpiece is arranged on the lower clamp, an air inlet pipe communicated with an air tightness tester is arranged at the bottom of the containing cavity, and the air inlet pipe is arranged on the side surface of the lower clamp; the pressing device comprises a fixed frame body, a movable pressing rod and a wrench for driving the pressing rod to move, and the pressing rod is hinged with the wrench through a hinged plate component so that the pressing rod can slide back and forth on the fixed frame body.

as an improvement, an upper hinge hole for hinging the hinge plate component and a guide sleeve for guiding the pressure rod to move are arranged on the fixed frame body, and the upper hinge hole and the guide sleeve are on the same vertical line.

The hinge plate assembly comprises an inner hinge plate and an outer hinge plate, wherein the outer hinge plate is positioned on two sides of the inner hinge plate, one end of the inner hinge plate is hinged to the upper hinge hole, the other end of the inner hinge plate is hinged to the wrench and the outer hinge plate, and the other end of the outer hinge plate is hinged to the top end of the pressure rod.

As an improvement, the bottom of the pressure lever is provided with a rubber mat.

As an improvement, a sealing ring is arranged on the workpiece and used for sealing a gap between the workpiece and the lower clamp.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a depression bar moves down and compresses tightly the work piece under the control of spanner, thereby the gas tightness tester adopts the pressure drop method to go to detect whether leak gas and learn the leakproofness of work piece in holding the chamber, and it not only has simple structure, easily operation, easy maintenance, advantage such as with low costs, has still improved the efficiency that detects electric automobile three-phase power connecting wire leakproofness.

Drawings

Fig. 1 is a schematic structural diagram of the initial state of the present invention.

Fig. 2 is a schematic structural view of the lower clamp in a downward view angle according to the present invention.

Fig. 3 is a schematic structural view of the main viewing angle of the present invention.

Fig. 4 is a schematic view of the state of the pressing device after pressing the workpiece.

Fig. 5 is an enlarged view at a in fig. 3.

Fig. 6 is a schematic structural diagram of the sealing ring according to the present invention.

Fig. 7 is a schematic structural view of the present invention when the wrench is wrenched.

Fig. 8 is a working principle diagram of the present invention.

Fig. 9 is a schematic structural view of the right view angle of the workpiece according to the present invention.

In the figure:

The air tightness detector 1, the pressing device 2, the lower clamp 3, the accommodating cavity 4, the air inlet pipe 5, the hinge plate assembly 6, the rubber mat 7, the workpiece 8, the pin 9, the pressure sensor 10, the fixing frame body 20, the pressure lever 21, the wrench 22, the inner hinge plate 60, the outer hinge plate 61, the sealing ring 80, the connecting terminal 81, the upper hinge hole 200, the guide sleeve 201 and the anti-skid rubber sleeve 220.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1, fig. 2, fig. 3, fig. 6, fig. 8 and fig. 9, a fixture for detecting a three-phase power connecting line of an electric vehicle comprises a pressing device 2 for pressing a workpiece 8 and a lower fixture 3 matched with the pressing device 2 to clamp the workpiece 8, and in the technical scheme, the fixture is further matched with a gas tightness tester 1 to be used, wherein the gas tightness tester 1 adopts a gas tightness tester of YMJ-ZP or YMJ-ZE, and the detection principle of pressure drop type is adopted to detect the tightness of the workpiece 8. It should be further explained here that a workpiece 8 composed of an electric vehicle three-phase power connecting line has three connecting terminals 81, in order to avoid the connecting terminals 81 of the workpiece 8 when the sealing performance of the workpiece 8 is detected, the lower fixture 3 is provided with a cavity 4 for detecting the sealing performance of the workpiece 8, and the number of the cavity 4 can be set according to actual conditions. The air tightness tester 1 is towards holding the chamber 4 and is gone into compressed air through intake pipe 5, after the pressurize of a period of time, the pressure sensor 10 of air tightness tester 1 can detect whether the pressure in holding the chamber 4 has the decline through intake pipe 5, whether work piece 8 has the leakage is judged to the pressure change that air tightness tester 1 shows, if there is the leakage, the pressure in holding the chamber 4 can reduce, when pressure is less than the pressure that air tightness tester 1 set for, air tightness tester 1 will report to the police, this kind of detection mode has efficient, the commonality is strong, the detectable rate is high, advantages such as nondestructive test, and go to set up the anchor clamps that can detect a plurality of products simultaneously according to the product of reality, in order to improve the efficiency that detects. The gas tightness tester 1 of this method is supporting the utility model discloses an anchor clamps, its commonality is strong, can be applicable to on semi-enclosed and the totally enclosed product, can also bleed into the negative pressure in semi-enclosed work piece inside and detect whether the product has revealed.

As shown in fig. 1, 3, 4, 5 and 7, the pressing device 2 includes a fixed frame 20, a movable pressing rod 21, and a wrench 22 for driving the pressing rod 21 to move, wherein the pressing rod 21 is hinged to the wrench 22 through the hinge plate assembly 6 so that the pressing rod 21 slides back and forth on the fixed frame 20. In the embodiment, the hinges are all hinged by using a pin 9. As an improvement, in order to increase the friction of the wrench 22, the anti-slip rubber sleeve 220 is provided on the wrench 22, so that the wrench 22 can be stably wrenched, and slip in the wrenching process is prevented. Specifically, the fixing frame body 20 is provided with an upper hinge hole 200 for hinging the hinge plate assembly 6 and a guide sleeve 201 for guiding the movement of the pressure lever 21, the upper hinge hole 200 and the guide sleeve 201 are on the same vertical line, the pressure lever 21 penetrates through the guide sleeve 201 to move up and down, and after the pressure lever 21 compresses the workpiece 8, the sealing ring 80 of the workpiece 8 is attached to the upper surface of the lower fixture 3, so that the cavity 4 is sealed, the gap between the workpiece 8 and the lower fixture 3 is prevented from leaking air, and the accuracy of the sealing detection is ensured. In the technical scheme, the hinge plate assembly 6 comprises an inner hinge plate 60 and two outer hinge plates 61, the two outer hinge plates 61 are positioned at two sides of the inner hinge plate 60, one end of the inner hinge plate 60 is hinged on the upper hinge hole 200, the other end of the inner hinge plate 60 is integrated with the wrench 22 and is hinged with the outer hinge plates 61, and the other end of the outer hinge plate 61 is hinged with the top end of the pressure rod 21. By the design, when the wrench 22 is wrenched, firstly, the inner hinge plate 60 is driven by the wrench 22 to rotate counterclockwise downward around the upper hinge hole 200, and the outer hinge plate 61 hinged with the inner hinge plate 60 is driven by the wrench 22 to rotate counterclockwise around the upper hinge hole 200, and the outer hinge plate 61 can avoid the upper hinge hole 200 to drive the press rod 21 to move downward while rotating outward, so that the rotating motion of the wrench 22 is converted into the linear motion of the press rod 21, and the workpiece 8 is pressed on the surface of the lower clamp 3. As an improvement, the bottom of the pressure lever 21 is provided with a rubber pad 7, and the rubber pad 7 is used for increasing the contact area between the pressure lever 21 and the workpiece 8, so that the pressure lever 21 can further press the workpiece 8 on the lower fixture 3, and the cavity 4 can form a sealed cavity by matching with the sealing of the sealing ring 80. In addition, the wrench 22 can be replaced by an air cylinder or a hydraulic cylinder or other driving devices, and the sliding of the pressing rod 21 can also be realized by controlling the air cylinder or the hydraulic cylinder to drive the pressing rod 21 through the controller.

The utility model discloses a theory of operation:

First, the connection terminals 81 of the workpiece 8 are inserted into the receiving chambers 4, respectively, so that the workpiece 8 is positioned on the lower jig 3, and the seal ring 80 of the workpiece 8 is now in contact with the upper surface of the lower jig 3, see fig. 1. Then, the wrench 22 is pulled counterclockwise, see fig. 7, the inner hinge plate 60 is driven by the wrench 22 to rotate counterclockwise around the upper hinge hole 200, the rotation of the inner hinge plate 60 drives the outer hinge plates 61 on both sides to rotate downward synchronously away from the upper hinge hole 200 and centering on the upper hinge hole 200, so as to push the press rod 21 to move downward, the press rod 21 moves downward, so that the rubber mat 7 at the bottom of the press rod 21 contacts with the workpiece 8, and with the continued pulling of the wrench 22, the rubber mat 7 finally presses the workpiece 8 against the lower fixture 3 under the pressure of the press rod 21, see fig. 4, at this time, the seal ring 80 of the workpiece 8 is extruded and deformed under the pressure of the press rod 21, so as to seal the gap between the workpiece 8 and the lower fixture 3, and at this time, the pressing of the workpiece 8 is completed.

Secondly, the air tightness detector 1 connected with the power supply is started, and the air tightness detector 1 fills precise compressed air into the accommodating cavity 4 through the air inlet pipe 5, wherein the compressed air amount is 5kpa to 100kpa, and the compressed air amount is preferably 50kpa in the embodiment. 50kpa of compressed air is slowly filled into the cavity 4, and the filling time is set to be 50 seconds, so that the workpiece 8 is prevented from being damaged due to too fast filling. When the inflation amount reaches 50kpa, the air tightness detector 1 cuts off the inflation loop, so that 50kpa of compressed air is stored in the cavity 4 and the air inlet pipe 5. After 10 seconds of pressure maintaining time, at this moment, the detection time of the air tightness detector 1 is set to be 10 seconds, namely, after the inflation volume reaches 50kpa, the pressure sensor 10 of the air tightness detector 1 is started, and the pressure sensor 10 continuously works for 10 seconds to continuously detect the pressure in the accommodating cavity 4, so that the accuracy of the tightness detection is ensured. If the workpiece 8 leaks, the pressure in the chamber 4 decreases, and when the pressure is lower than the set pressure (in this embodiment, 49.5 kpa), the airtightness detector 1 gives an alarm to alert an operator. If the workpiece 8 is not leaking, the workpiece 8 is qualified. After the detection is completed, the air-tightness detector 1 discharges the compressed air. After one workpiece 8 is detected, the wrench 22 is pulled in the opposite direction, so that the pressing rod 21 is separated from the contact with the workpiece 8, the workpiece 8 can be taken out from the lower fixture 3 and then another workpiece 8 is placed for detection, and the subsequent detection process is consistent with the detection process, which is not described herein again.

to sum up, the utility model has the advantages of simple structure, easily operation, easy maintenance, with low costs to the air carries out the leakproofness for the medium to work piece 8 and detects, not only does not produce the damage (nondestructive test promptly) to work 8, has still improved the efficiency that detects electric automobile three-phase power connecting wire leakproofness.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.

Claims (5)

1. The utility model provides an anchor clamps for detecting electric automobile three-phase power connecting wire which characterized in that: the device comprises a pressing device (2) used for pressing a workpiece (8) and a lower clamp (3) matched with the pressing device (2) to clamp the workpiece (8), wherein a containing cavity (4) used for detecting the tightness of the workpiece (8) is arranged on the lower clamp (3), an air inlet pipe (5) communicated with an air tightness tester (1) is arranged at the bottom of the containing cavity (4), and the air inlet pipe (5) is arranged on the side surface of the lower clamp (3);

The pressing device (2) comprises a fixed frame body (20), a movable pressing rod (21) and a wrench (22) for driving the pressing rod (21) to move, wherein the pressing rod (21) is hinged with the wrench (22) through a hinged plate assembly (6) to enable the pressing rod (21) to slide back and forth on the fixed frame body (20).

2. The clamp for detecting the three-phase power connecting line of the electric automobile according to claim 1, characterized in that: the fixed frame body (20) is provided with an upper hinge hole (200) for hinging the hinge plate component (6) and a guide sleeve (201) for guiding the movement of the pressure lever (21), and the upper hinge hole (200) and the guide sleeve (201) are on the same vertical line.

3. The clamp for detecting the three-phase power connecting line of the electric automobile according to claim 2, characterized in that: the hinge plate assembly (6) comprises an inner hinge plate (60) and an outer hinge plate (61), the outer hinge plate (61) is located on two sides of the inner hinge plate (60), one end of the inner hinge plate (60) is hinged to the upper hinge hole (200), the other end of the inner hinge plate (60) is in an integrated structure with the wrench (22) and is hinged to the outer hinge plate (61), and the other end of the outer hinge plate (61) is hinged to the top end of the pressure rod (21).

4. The clamp for detecting the three-phase power connecting line of the electric automobile according to claim 1, characterized in that: the bottom of the pressure lever (21) is provided with a rubber cushion (7).

5. The clamp for detecting the three-phase power connecting line of the electric vehicle as claimed in any one of claims 1 to 4, wherein: and a sealing ring (80) is arranged on the workpiece (8), and the sealing ring (80) is used for sealing a gap between the workpiece (8) and the lower clamp (3).