CN216012639U - Pressure sensor for nut leak detection - Google Patents

Abstract

The utility model provides a nut leak hunting pressure sensor, including proximity switch, adapter, cylinder body, piston rod, spring, probe and response, the adapter is the L type, and proximity switch and cylinder body are connected with the transverse connection port and the vertical connection port of adapter respectively, and the piston rod dress cover is inside the cylinder body with liftable sliding, and the spring can be set up inside the cylinder body by piston rod compression ground, and the upper end and the probe connection of piston rod, lower extreme are connected with the response. The utility model discloses can leak the nut to the car sheet metal component and weld and detect, improve the nut and leak and weld detection efficiency, guarantee leak hunting effect.

Description

Pressure sensor for nut leak detection

Technical Field

The utility model belongs to the technical field of the sensor, especially, relate to a nut leak hunting pressure sensor.

Background

When the nut of the automobile sheet metal part is welded, whether the nut welding missing condition exists at the position of the nut hole in the sheet metal part or not needs to be checked. At present, there is not the specialized tool that can be used for detecting that car sheet metal component nut leaks and welds yet, and the nut on the car sheet metal component leaks and welds mainly carries out the inspection through the manual work, and not only inefficiency is examined to the manual work, and there is the influence of human factor in the leak hunting effect moreover.

SUMMERY OF THE UTILITY MODEL

In view of the above prior art's shortcoming, the utility model aims to provide a nut leak hunting pressure sensor can leak to weld to the nut of car sheet metal component and detect, improves the nut and leaks and welds detection efficiency, the guarantee effect of hunting leak.

In order to realize above-mentioned purpose and other relevant purposes, the utility model provides a nut leak hunting pressure sensor, including proximity switch, adapter, cylinder body, piston rod, spring, probe and response piece, the adapter is the L type, proximity switch and cylinder body are connected with the transverse connection port and the vertical connection port of adapter respectively, the piston rod dress cover is inside the cylinder body with liftable sliding, the spring can be set up inside the cylinder body by piston rod compression ground, the upper end and the probe connection of piston rod, lower extreme and response piece are connected.

In an embodiment of the present invention, the inner side wall of the cylinder body is provided with a shoulder, the piston rod includes a first piston rod section and a second piston rod section which are connected to each other from top to bottom, the first piston rod section is in sliding contact with the inner side wall of the cylinder body, the second piston rod section is in sliding contact with the inner side wall of the shoulder, and the spring is sleeved outside the second piston rod section and located above the shoulder.

In an embodiment of the present invention, the inner side wall of the cylinder body is provided with a convex shoulder, the sensing member is located below the convex shoulder, and the convex shoulder can limit the ascending stroke of the sensing member.

In an embodiment of the present invention, the piston rod is connected to the probe in a floating manner.

In an embodiment of the present invention, the piston rod includes a connector at the top, the probe includes a connecting sleeve at the bottom, the connecting sleeve is in the outside of the connector and is connected through a pin shaft, and a floating gap exists between the connecting sleeve and the connector.

In an embodiment of the present invention, the probe includes a ball head at the top, and the diameter of the ball head is larger than the diameter of the nut to be detected.

In an embodiment of the present invention, the sensing member is connected to a screw, the bottom of the piston rod is axially provided with a screw hole, and the sensing member is screwed into the screw hole through the screw rod and is installed at the lower end of the piston rod.

In an embodiment of the utility model, the lateral wall of cylinder body is equipped with the external screw thread, lock nut and gasket have been overlapped in the outside suit of cylinder body.

In an embodiment of the present invention, the adapter is made of a non-metallic flame retardant material.

As above, the utility model discloses a nut leak hunting pressure sensor has following beneficial effect:

first, the utility model discloses can leak to weld to the nut of car sheet metal component and detect, improve the nut and leak and weld detection efficiency, guarantee leak hunting effect.

Second, the utility model discloses an effective detection stroke is big, and the displacement that the response piece pressurized descends reaches effective detection stroke within range and can trigger the response piece, and application operating mode wide range, and can effectively avoid the sensor to be crushed.

Third, the utility model discloses in, for floating the connection between probe and the piston rod, because there is positional deviation in the nut hole of sheet metal component, unsteady probe structure can be through the positional deviation in self adjustment compensation nut hole for the testing process is more smooth and easy.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic cross-sectional view of an embodiment of the present invention.

Fig. 3 is a schematic structural diagram of the connection between the piston rod and the probe in the embodiment of the present invention.

Fig. 4 is a schematic structural diagram of the assembly of the piston rod, the cylinder body and the spring in the embodiment of the present invention.

Fig. 5 is a usage status diagram of the embodiment of the present invention.

Detailed Description

The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.

Please refer to fig. 1 to 5. It should be understood that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any structure modification, ratio relationship change or size adjustment should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the function that the present invention can produce and the purpose that the present invention can achieve. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.

Referring to fig. 1 and 2, the utility model provides a nut leak hunting pressure sensor, including proximity switch 1, adapter 2, cylinder body 3, piston rod 4, spring 5, probe 6, response piece 7, round pin axle 8 and lock nut 9.

Adapter 2 is the L type, adopts non-metallic flame retardant material to make, can enough avoid producing the interference to proximity switch 1's response, can be applicable to the nut welded operating mode well again. The proximity switch 1 is connected to a transverse connection port of the adapter 2. The cylinder body 3 is of a hollow structure which penetrates through the cylinder body in the axial direction, an annular convex shoulder 3-1 is arranged at the bottom end, close to the inner side wall, of the cylinder body 3, and the cylinder body 3 is connected with a vertical connecting port of the adapter 2.

The piston rod 4 is arranged in the cylinder 3 in a lifting and sliding way. As shown in FIG. 4, the piston rod 4 comprises a connector 4-1, a first piston rod segment 4-2 and a second piston rod segment 4-3 connected with each other in sequence from top to bottom. Wherein the diameter of the first piston rod section 4-2 is greater than the diameter of the connecting head 4-1 and the second piston rod section 4-3. When the piston rod 4 is sleeved in the cylinder body 3, the first piston rod section 4-2 is in sliding contact fit with the inner side wall of the cylinder body 3, and the second piston rod section 4-3 is in sliding contact fit with the inner side wall of the shoulder 3-1, so that a good sliding guide effect can be exerted, and the lifting movement of the sea plug rod 4 is more stable.

A spring 5 is arranged inside the cylinder 3 compressible by a piston rod 4. As shown in fig. 4, the spring 5 is fitted over the second piston rod section 4-3 and above the shoulder 3-1, the lower end of the spring 5 being able to bear against the upper end face of the shoulder 3-1. When the piston rod 4 is pressed to move downwards, the lower end surface of the first piston rod section 4-2 comes into contact with the upper end of the spring 5, so that the spring 5 can be compressed.

As shown in FIG. 3, the probe 6 comprises a ball head 6-3, a support rod 6-2 and a connecting sleeve 6-1 which are integrally formed and connected with each other from top to bottom. Wherein, the diameter of the ball head 6-3 is larger than the aperture of the nut to be detected, and the connecting sleeve 6-1 is connected with the connecting head 4-1 at the top of the piston rod 4 in a floating way.

Specifically, as shown in fig. 3, the connecting sleeve 6-1 is sleeved outside the connecting head 4-1, the connecting sleeve 6-1 and the connecting head 4-1 are provided with pin holes along the radial direction, and the connecting sleeve 6-1 and the connecting head 4-1 are inserted into the pin holes through the pin shaft 8 to realize rotatable connection. A gap exists between the connecting sleeve 6-1 and the connecting head 4-1, so that the probe 6 can rotate around the pin shaft 8 within the gap range, and the floating connection effect is achieved. Because the nut hole of sheet metal component has positional deviation, the probe 6 that floats can adjust the positional deviation who compensates the nut hole through self, and probe 6 can insert smoothly in the nut hole when the guarantee sensor detects.

The induction part 7 is connected with a screw rod, the bottom of the piston rod 4 is provided with a screw hole along the axial direction, and the induction part 7 is screwed into the screw hole through the screw rod and is arranged at the lower end of the piston rod 4. The sensing piece 7 is positioned below the convex shoulder 3-1, and the size of the sensing piece 7 is larger than the aperture of the hollow through hole of the convex shoulder 3-1, so that the convex shoulder 3-1 can limit the ascending stroke of the sensing piece 7.

As shown in fig. 1, the outer side wall of the cylinder 3 is provided with an external thread, and the outer side of the cylinder 3 is sleeved with two lock nuts 9 and two washers for mounting and fixing the sensor.

In use, the nut leak detection pressure sensor is mounted to a mounting plate by tightening a nut 9 as shown in fig. 5. The probe 6 is inserted into a nut hole of a sheet metal part, and at the moment, if a nut is welded at the position of the nut hole, the probe 6 is pressed, so that the piston rod 4 drives the induction part 7 to descend relative to the cylinder body 3, and the proximity switch 1 is triggered, which indicates that no nut welding leakage exists, and the spring 5 is compressed in the process; if the proximity switch 1 has no signal output, the nut is indicated to be in a welding missing state at the position. After the sensor is withdrawn from the nut hole, the piston rod 4 and the probe 6 can be reset under the rebound action of the spring 5.

To sum up, the utility model discloses can weld the nut of car sheet metal component to leak and detect, improve the nut and leak and weld detection efficiency, guarantee the leak hunting effect; and the effective detection stroke is large, the working condition application range is wide, and the sensor can be effectively prevented from being crushed. Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims (9)

1. The utility model provides a nut leak hunting pressure sensor which characterized in that: including proximity switch (1), adapter (2), cylinder body (3), piston rod (4), spring (5), probe (6) and response (7), adapter (2) are the L type, proximity switch (1) and cylinder body (3) are connected with the transverse connection port and the vertical connection port of adapter (2) respectively, piston rod (4) liftable dress cover with sliding inside cylinder body (3), spring (5) can be set up inside cylinder body (3) by piston rod (4) compression ground, the upper end and probe (6) of piston rod (4) are connected, the lower extreme is connected with response (7).

2. A nut leak detection pressure sensor as defined in claim 1, wherein: the piston rod is characterized in that a convex shoulder (3-1) is arranged on the inner side wall of the cylinder body (3), the piston rod (4) comprises a first piston rod section (4-2) and a second piston rod section (4-3) which are connected with each other from top to bottom, the first piston rod section (4-2) is in sliding contact fit with the inner side wall of the cylinder body (3), the second piston rod section (4-3) is in sliding contact fit with the inner side wall of the convex shoulder (3-1), and the spring (5) is sleeved on the outer side of the second piston rod section (4-3) and is located above the convex shoulder (3-1).

3. A nut leak detection pressure sensor as defined in claim 1, wherein: the inner side wall of the cylinder body (3) is provided with a convex shoulder (3-1), the sensing piece (7) is located below the convex shoulder (3-1), and the convex shoulder (3-1) can limit the ascending stroke of the sensing piece (7).

4. A nut leak detection pressure sensor as defined in claim 1, wherein: the piston rod (4) is in floating connection with the probe (6).

5. The pressure sensor for nut leak detection according to claim 4, wherein: the piston rod (4) comprises a connector (4-1) at the top, the probe (6) comprises a connecting sleeve (6-1) at the bottom, the connecting sleeve (6-1) is sleeved outside the connector (4-1) and is rotatably connected through a pin shaft (8), and a floating gap exists between the connecting sleeve (6-1) and the connector (4-1).

6. A nut leak detection pressure sensor as defined in claim 1, wherein: the probe (6) comprises a ball head (6-3) at the top, and the diameter of the ball head (6-3) is larger than the aperture of the nut to be detected.

7. A nut leak detection pressure sensor as defined in claim 1, wherein: the sensing piece (7) is connected with a screw rod, a screw hole is formed in the bottom of the piston rod (4) along the axial direction, and the sensing piece (7) is screwed into the screw hole through the screw rod and is installed at the lower end of the piston rod (4).

8. A nut leak detection pressure sensor as defined in claim 1, wherein: the outer side wall of the cylinder body (3) is provided with external threads, and the outer side of the cylinder body (3) is sleeved with a locking nut (9) and a gasket.

9. A nut leak detection pressure sensor as defined in claim 1, wherein: the adapter (2) is made of a non-metal flame-retardant material.

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