Towing hook pipe installation detection probe and device

Abstract

A towing hook pipe installation detection probe and device relates to the technical field of automobile part detection equipment, and comprises a first installation pipe and a second installation pipe which are perpendicular to each other and communicated with each other; a pressure sensor is arranged at one end of the first installation pipe, and a proximity switch is installed in the second installation pipe. A connecting rod capable of axially moving in the first installation pipe is arranged in the first installation pipe, one end, close to the pressure sensor, of the connecting rod is a detection shifting block, the other end of the connecting rod is a detection head, and the length of the connecting rod is larger than the moving distance of the connecting rod in the first installation pipe. According to the scheme, the proximity switch and the pressure sensor are combined, so that the two conditions of neglected mounting and reverse mounting of the front towing hook pipe can be effectively identified, and the condition that defective parts flow to the next procedure to cause quality accidents is avoided; the proximity switch is arranged at the upper end of the first installation pipe, the high-temperature part is not directly detected through the movement of the detection shifting block of the detection connecting rod, direct contact with the high-temperature part is avoided, and the service life of the proximity switch is prolonged.

Description

Technical Field

[0001] This utility model relates to the technical field of automotive parts testing equipment, specifically to a tow hook pipe installation testing probe and device. Background Technology

[0002] A trailer hitch is a mechanism used for towing a vehicle in an emergency. The trailer hitch is installed or connected via a tow hook tube on the front or rear frame. Specifically, the tow hook tube has internal threads for installation. However, the inner diameter of the internal threads at both ends of the tow hook tube is different. Therefore, the installation direction needs to be preset during installation. Then, the tow hook tube is clamped and fixed to the corresponding frame, and after inspection, it can be welded.

[0003] Currently, the detection process typically uses a combination of proximity switches and PLC signals. When the proximity switch detects whether the front tow hook tube is clamped on the fixture, it outputs a PLC signal, which the PLC then uses to determine whether the next action can be performed. However, since the appearance difference between the front tow hook tube installed correctly and incorrectly is small, the proximity switch has difficulty in effectively identifying it. Therefore, this detection structure can only identify whether the front tow hook tube is missing, but it cannot effectively identify whether the front tow hook tube is installed incorrectly. Furthermore, the proximity switch is too close to the weld, which can easily cause it to overheat and be damaged frequently. Utility Model Content

[0004] I. Technical problems to be solved

[0005] This invention addresses the shortcomings of existing technologies by proposing a detection probe and device for tow hook pipe installation, which can effectively determine whether the tow hook pipe is installed and clamped in the wrong direction, making the welding detection of tow hook pipe more accurate.

[0006] II. Specific Technical Solutions

[0007] A detection probe for a tow hook pipe includes a primary mounting pipe and a secondary mounting pipe mounted on the primary mounting pipe. The primary and secondary mounting pipes are perpendicular to each other and connected. A pressure sensor is installed at one end of the primary mounting pipe, and a proximity switch is installed inside the secondary mounting pipe. A connecting rod that can move axially within the primary mounting pipe is provided inside the primary mounting pipe. The end of the connecting rod near the pressure sensor is a detection lever, and the other end of the connecting rod is a probe head. The length of the connecting rod is greater than its movement distance within the primary mounting pipe.

[0008] Implementation principle and working principle:

[0009] When the tow hook tube is not installed in the fixture, the connecting rod inside will not move during the downward movement of the detection probe; the proximity switch will not detect the detection block and there will be no signal output, indicating that the tow hook tube is installed. When the tow hook tube is installed backwards into the fixture, the probe will be obstructed by the thread at the small inner diameter end, causing it to move upwards inside the tube, thus simultaneously causing the pressure sensor and proximity switch to detect signals, indicating that it is installed backwards. In the normal state, the probe will enter the large diameter end. Although the probe will also drive the connecting rod upwards, its movement is small, and the pressure on the pressure sensor is 0 or less than when it is installed backwards, indicating that welding has started normally. This solution can effectively identify the two situations of missing and reversed tow hook tubes, preventing defective parts from flowing to the next process and causing quality accidents.

[0010] Preferably, a limiting part is provided inside the mounting tube to prevent the connecting rod from sliding out of the mounting tube. The advantage of this preferred embodiment is that the limiting part can limit the connecting rod and ensure that the limiting rod is always in an effective state.

[0011] Preferably, the limiting part is a limiting protrusion disposed inside the mounting tube; the limiting protrusion is an annular limiting protrusion, or multiple limiting protrusions spaced apart around the inner wall of the mounting tube; the beneficial effect of this preferred embodiment is that when the limiting protrusion is an annular limiting protrusion, it can not only play a limiting role, but also a guiding role, thus having a stronger function; when there are multiple limiting protrusions, less material is used, and the material cost is lower.

[0012] Preferably, a reset spring is also fitted on the connecting rod, and the reset spring is disposed between the limiting part and the probe head; the beneficial effect of this preferred embodiment is that, by setting the reset spring, after the detection is completed, the reset spring drives the connecting rod to move downward under the reaction force of the limiting part to achieve rapid reset.

[0013] Preferably, the length of the connecting rod is greater than its travel distance within the installation tube; the advantage of this preferred setting is that such parameter settings can help the pressure sensor to be squeezed when the tow hook tube is assembled in reverse, thus reducing detection errors.

[0014] Preferably, the detection block is fitted with a pressure spring on the side away from the connecting rod; the advantage of this preferred option is that by setting the pressure spring, the assembly of the tow hook tube can be determined by the pressure difference, avoiding excessive force that could cause wear to the pressure sensor.

[0015] Preferably, the probe is detachably mounted at one end of the connecting rod; the advantage of this preferred embodiment is that the detachable nature of the probe facilitates the assembly of the connecting rod into the mounting tube.

[0016] This solution also provides a tow hook pipe installation detection device, which, in addition to the tow hook pipe installation detection probe described in any of the above-mentioned embodiments, also includes a telescopic push rod. The push rod end of the telescopic push rod is fixedly connected to two or any one of the installation pipe one and installation pipe two. The telescopic push rod makes it easier or more feasible to detect the tow hook pipe.

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

[0018] 1. The detection probe provided in this solution, through the combination of proximity switch and pressure sensor, can effectively identify two situations: missing and reversed installation of the front tow hook tube, thus preventing defective parts from flowing to the next process and causing quality accidents.

[0019] 2. In this solution, the proximity switch is installed at the upper end of the mounting tube and mainly detects the movement of the detection block of the connecting rod, avoiding direct contact with high-temperature parts and extending the service life of the proximity switch. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the detection probe installed on the hook tube of this utility model.

[0021] Figure 2 This is a cross-sectional view of side A of the detection probe installed on the hook pipe of this utility model.

[0022] Figure 3 This is a schematic diagram of the connecting rod structure of this utility model.

[0023] Figure 4 This is a schematic diagram of the detection device for the tow hook pipe of this utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Install one tube 2. Install two tubes 3. Pressure sensor 4. Proximity switch 5. Connecting rod 6. Detection block 7. Detector head 8. Limiting part 9. Return spring 10. Pressure spring 11. Telescopic push rod Detailed Implementation

[0026] The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings, so that the advantages and features of this utility model can be more easily understood by those skilled in the art, thereby providing a clearer and more definite definition of the scope of protection of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0027] like Figure 1-4 As shown:

[0028] A probe for detecting the installation status of tow hook pipes, such as... Figure 1This includes an installation pipe 1, and an installation pipe 2 integrally formed or welded to the right side of the installation pipe 1. The installation pipe 1 and the installation pipe 2 are perpendicular to each other and connected; for example... Figure 2 and 3 A pressure sensor 3 is installed at the upper end of the first mounting tube 1, and a proximity switch 4 is installed inside the second mounting tube 2. A connecting rod 5 is installed axially inside the first mounting tube 1. The upper end of the connecting rod 5 near the pressure sensor 3 is a detection block 6, and the lower end of the connecting rod 5 is a probe head 7.

[0029] In specific implementation, a limiting part 8 is integrally formed along the inner wall of the mounting tube 1, wherein the limiting part 8 can prevent the connecting rod 5 from sliding out or detaching from the mounting tube 1; specifically, the limiting part 8 is a limiting protrusion integrally formed or bonded to the inside of the mounting tube 1; in one embodiment, the limiting protrusion is an annular limiting protrusion, or multiple limiting protrusions spaced around the inner wall of the mounting tube 1. In implementation, the limiting part 8 can limit the connecting rod 5, ensuring that the connecting rod 5 is always in an effective state; when the limiting protrusion is an annular limiting protrusion, it can not only limit the connecting rod 5, but also guide it, thus having a stronger function. When there are multiple limiting protrusions, less material is used, resulting in lower material costs.

[0030] When implementing, such as Figure 2 and Figure 3 A reset spring 9 is also fitted onto the connecting rod 5, specifically positioned between the limiting part 8 and the probe head 7. With the reset spring 9, after detection, the reset spring 9, under the reaction force of the limiting part 8, drives the connecting rod 5 downwards to achieve rapid reset. In practice, to ensure the pressure sensor is squeezed when the tow hook tube is assembled in the reverse direction, thus reducing detection errors, the length of the connecting rod 5 is greater than its travel distance within the mounting tube 1. Specifically, to avoid excessive force causing wear to the pressure sensor 3, a pressure spring 10 is fitted onto the upper end of the detection block 6. The pressure spring 10 allows for the determination of whether the tow hook tube is assembled in the reverse direction based on the pressure difference. In practice, to facilitate the installation of the reset spring 9 and the connecting rod 5, the probe head is detachably mounted at the lower end of the connecting rod.

[0031] like Figure 4 This solution also provides a tow hook pipe installation detection device, specifically including a telescopic push rod 11, wherein the push rod end of the telescopic push rod 11 is fixedly connected to two or any one of the installation pipe 1 and the installation pipe 2; in this solution, it is connected to the upper side of the installation pipe 2, and the setting of the telescopic push rod 11 makes it easier or more convenient to detect the tow hook pipe.

[0032] The working principle of this solution is as follows:

[0033] When the tow hook tube is not installed in the clamp, the connecting rod inside the detection probe will not move during the downward movement of the detection probe; if the proximity switch 4 does not detect the detection block 6 and there is no signal output, it is considered that the tow hook tube is not installed.

[0034] When the tow hook tube is installed backwards into the clamp, the probe head 7 will be blocked by the thread at the small inner diameter end, causing it to move upwards inside the installation tube 1, thereby enabling both the pressure sensor 3 and the proximity switch 4 to detect signals. At this time, it is determined that it is installed backwards.

[0035] In normal conditions, probe 7 will enter the large-diameter end. Although probe 7 will also move the connecting rod upward, its movement is small. The pressure on the pressure sensor is 0 or less than when it is reversed, which indicates that welding has started normally. This solution can effectively identify the two situations of missing and reversed installation of the tow hook tube, and prevent defective parts from flowing to the next process and causing quality accidents.

[0036] The beneficial effects of this solution are that by combining proximity switches and pressure sensors, it can effectively identify two situations: missing and reversed installation of the front tow hook tube, thus preventing defective parts from flowing to the next process and causing quality accidents. The proximity switch is located at the upper end of the tube and is detected by the movement of the detection block of the detection connecting rod, rather than directly detecting high-temperature parts, avoiding direct contact with high-temperature parts and extending the service life of the proximity switch.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims.

Claims

1. A detection probe for mounting on a tow hook pipe, characterized in that: It includes a first mounting tube (1) and a second mounting tube (2) mounted on the first mounting tube (1), the first mounting tube (1) and the second mounting tube (2) being perpendicular to each other and connected; a pressure sensor (3) is provided at one end of the first mounting tube (1), and a proximity switch (4) is installed in the second mounting tube (2); a connecting rod (5) that can move axially in the first mounting tube (1) is provided in the first mounting tube (1), a detection block (6) is provided at one end of the connecting rod (5) near the pressure sensor (3), and a probe (7) is provided at the other end of the connecting rod (5).

2. The detection probe for hook pipe installation according to claim 1, characterized in that: The mounting tube (1) is provided with a limiting part (8) to prevent the connecting rod (5) from sliding out of the mounting tube (1).

3. The detection probe for installing the tow hook pipe according to claim 2, characterized in that: The limiting part (8) is a limiting protrusion disposed inside the mounting tube (1); the limiting protrusion is an annular limiting protrusion, or a plurality of limiting protrusions disposed at intervals around the inner wall of the mounting tube (1).

4. The hook pipe installation detection probe according to claim 2, characterized in that: A reset spring (9) is also sleeved on the connecting rod (5), and the reset spring (9) is located between the limiting part (8) and the probe (7).

5. The detection probe for hook pipe installation according to claim 1, characterized in that: The length of the connecting rod (5) is greater than its movable distance within the mounting tube (1).

6. The detection probe for installing a tow hook pipe according to claim 1, characterized in that: The detection block (6) is fitted with a pressure spring (10) on the side away from the connecting rod (5).

7. The detection probe for installing a tow hook pipe according to claim 1, characterized in that: The probe (7) is detachably mounted on one end of the connecting rod (5).

8. A tow hook pipe installation detection device, characterized in that: It includes the tow hook pipe installation detection probe according to any one of claims 1-5; it also includes a telescopic push rod (11), the push rod end of which is fixedly connected to two or any one of the installation pipe (1) and the installation pipe (2).

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