Nut screwing in-place detection structure

Abstract

The utility model discloses a nut screwing in-place detection structure, which is used for being matched with screwing equipment to detect whether the position of a nut is in place or not, and comprises a positioning pressing block, an elastic pressing block is arranged in the positioning pressing block, the positioning pressing block is contacted with one end of the elastic pressing block when the nut is screwed out, and the other end of the elastic pressing block is contacted with the other end of the elastic pressing block when the nut is screwed out. One end of the elastic pressing block is connected with a nut, the other end of the elastic pressing block is connected with a conduction connecting rod, the conduction connecting rod is connected with a position sensor, and the position sensor is suitable for monitoring the assembling precision of the nut in real time through movement of the conduction connecting rod so as to ensure that the assembling precision of the nut can be within a qualified interval. According to the utility model, nut assembly and detection work of the detection structure can be carried out synchronously, so that time waste caused by respective work is avoided; meanwhile, it can be guaranteed that the threaded end is within the tolerance range after being detected in place, the detection end and the data reference end are kept consistent, and then the accuracy of the detection result is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of detection devices, in particular to a nut screw-in position detection structure. Background Art

[0002] At present, the automatic screwing process of the mounting nuts of the headlight housing is divided into two parts: Figure 1 As shown in the figure, the first is based on the in-place detection of the tooling during the screwing process of the loading nut; the second is the retest of the leakage of the threaded end of the loading nut from the shell after the screwing of the loading nut. At present, these two detection methods are unstable after assembly, resulting in assembly tolerance.

[0003] Method 1 detection is to check the accuracy of the screw-in end of the nut after the screw-in process is completed. However, the customer requires high precision control of the nut's selected end, which will improve the accuracy of the screw-in end (i.e. screw-in end accuracy = customer required accuracy - nut processing accuracy). At this time, the accuracy may be negative, which is an impossible detection value feedback, resulting in unstable assembly.

[0004] The second method of detection is to perform accuracy detection after the positioning block of the upper mold leaves the shell after assembly. Because the block is removed, the actual detection position and the screw-on position are inconsistent, resulting in inaccurate measurement data.

[0005] In addition to the above-mentioned structural problems, another factor that affects detection is customer demand. Customers require that the sheet metal side be the precision control side. Generally, the screw-out end of the screw-in nut is the sheet metal side, and in a very small number of special cases, the screw-in end is the sheet metal side.

[0006] In view of this, it is necessary to design a nut screw-in position detection structure to solve the above problem. Utility Model Content

[0007] The utility model aims to solve at least one of the technical problems existing in the prior art.

[0008] To this end, the utility model provides a nut screw-in position detection structure, which can optimize the unstable, inaccurate and uncertain factors of the detection structure, improve the detection accuracy, shorten the detection time and reduce the cost.

[0009] According to the first aspect of the utility model, a nut screw-in position detection structure is provided, which is used to cooperate with the screw-in equipment to detect whether the nut is in place. The detection mechanism includes a positioning block, an elastic block is provided in the positioning block, and contacts with one end of the elastic block when the nut is screwed out, and the other end of the elastic block is connected to a conductive connecting rod, and the conductive connecting rod is connected to a position sensor. The position sensor is suitable for real-time monitoring of the assembly accuracy of the nut via the movement of the conductive connecting rod to ensure that the assembly accuracy of the nut is within a qualified range.

[0010] Preferably, one end of the elastic pressure block connected to the conductive connecting rod is recessed inward to form a guide groove, the conductive connecting rod is movably connected to the guide groove, and a positioning pin is provided in the guide groove, wherein the positioning pin is suitable for limiting the conductive connecting rod to be able to move only along the guide groove.

[0011] Further preferably, the conductive connecting rod is arranged in the mounting housing, and the elastic member is sleeved on the conductive connecting rod, so that when the elastic pressing block drives the conductive connecting rod to move axially, the elastic member is suitable for alleviating vibration of the elastic pressing block.

[0012] Preferably, the position sensor is electrically connected to the rotating device so that when the position sensor monitors that the assembly accuracy of the nut is within a qualified range, the position sensor is suitable for providing feedback to the rotating device and keeping the motor of the rotating device stopped and the air pressure stable.

[0013] Further preferably, the elastic pressing block is suitable for partially protruding out of the inner plane of the positioning pressing block in a free state.

[0014] Preferably, a sensor adjustment seat is provided on the position sensor, and the sensor adjustment seat is suitable for adjusting the position of the position sensor in a plane to compensate for the accuracy of nut processing and assembly.

[0015] Further preferably, the position adjustment seat is arranged on a support plate, an adjustment hole is opened on the support plate, the position sensor passes through the adjustment hole, and the adjustment hole is suitable for limiting the adjustment range of the position sensor driven by the sensor adjustment seat in the horizontal direction.

[0016] Preferably, a positioning block adjustment seat is further provided at the bottom of the support plate, and the positioning block adjustment seat is in contact with the mounting shell, so that the mounting shell can be adjusted via the positioning block adjustment seat to drive the positioning block in the horizontal direction.

[0017] Further preferably, a backstop assembly is provided between the support plate and the mounting shell, the backstop assembly comprising an adjusting rod passing through the support plate, an adjusting member arranged on the adjusting rod and respectively located on the two surfaces of the support plate, and a fixing block arranged at the end of the adjusting rod and in contact with the mounting shell, the adjusting member being suitable for displacement along the adjusting rod so that the adjusting member respectively abuts against the upper and lower surfaces of the support plate and fixes the mounting shell.

[0018] Preferably, the anti-retraction assembly further comprises an anti-retraction mounting plate arranged at the end of the position sensor, and the anti-retraction mounting plate is suitable for pressing the position sensor to limit the position deviation of the position sensor after long-term operation.

[0019] The beneficial effect of the utility model is that the nut assembly and detection work of the detection structure can be carried out simultaneously, avoiding the time wasted by working separately; at the same time, it can ensure that the thread end is within the tolerance range after being detected in place, and the detection end is consistent with the data reference end, thereby ensuring the accuracy of the detection result.

[0020] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by practicing the utility model. The purpose and other advantages of the utility model are realized and obtained by the structures specifically pointed out in the description, claims and drawings.

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0023] Figure 1 This is a schematic diagram of the overall tooling of the previous testing organization;

[0024] Figure 2 It is a schematic diagram of the overall tooling of the nut screwing-in-place detection structure of the utility model;

[0025] Figure 3 It is a three-dimensional diagram of the detection mechanism of the nut screwing-in-place detection structure of the utility model;

[0026] Figure 4 It is a cross-sectional view of the detection mechanism of the nut screwing-in-place detection structure of the utility model;

[0027] Figure 5 It is a schematic diagram of the nut screwing direction and end face of the nut screwing-in-place detection structure of the utility model.

[0028] Description of reference numerals:

[0029] 1a, thread end retest mechanism; 2a, rotation in place detection mechanism; 3a, screw-in end; 4a, screw-out end;

[0030] 1. Detection mechanism; 11. Positioning pressure block; 12. Elastic pressure block; 13. Positioning pin; 14. Conducting connecting rod; 15. Elastic member; 16. Retraction stop assembly; 17. Position sensor; 18. Retraction stop mounting plate; 19. Sensor adjustment seat; 110. Support plate; 111. Positioning pressure block adjustment seat; 112. Mounting shell. DETAILED DESCRIPTION

[0031] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0032] In the description of the present invention, it should be understood that the terms "top", "bottom", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0033] See also Figure 1 At present, the automatic screwing process of loading nuts includes a rotation detection mechanism 2a during the screwing process of loading nuts and a re-detection mechanism 1a for the threaded end of the loading nut that leaks out of the shell after the screwing assembly of the loading nut. Among them, the above mechanisms and their coordination have the following problems: the detection of the screw-in end 3a leads to unstable detection accuracy of the screw-out section; the positioning of the re-detection of the screw-out end 4a is not unique; the repeated detection causes a long beat; and the cost burden caused by multiple sensors.

[0034] See also Figure 2A nut screwing-in position detection structure according to a specific embodiment of the utility model can be matched with the screwing equipment to detect whether the nut is in place, and the loading nut is screwed in by tapping upward from the screw-in end 3a. The detection mechanism 1 includes a positioning block 11, which can limit the detection position of the nut at a set position. An elastic block 12 is arranged inside the positioning block 11. When the nut is screwed out, the elastic block 12 is suitable for partially protruding out of the inner plane of the positioning block 11 in a free state. As the nut is continuously rotated and advanced, the nut contacts one end of the elastic block 12 at this time. In addition, the other end of the elastic block 12 is connected to a conductive connecting rod 14, which is connected to a position sensor 17, and the monitoring of the nut is conducted through the movement of the conductive connecting rod 14. The assembly accuracy of the nut can be monitored in real time through the position sensor 17 to ensure that the assembly accuracy of the nut is within the qualified range.

[0035] Specifically, one end of the elastic pressure block 12 connected to the conductive connecting rod 14 is recessed to form a guide groove, and the conductive connecting rod 14 is embedded in the guide groove so as to be able to move in the guide groove. At the same time, a positioning pin 13 is also provided in the guide groove, and the positioning pin 13 can also be embedded in the guide groove. Therefore, when the conductive connecting rod 14 moves axially, the positioning pin 13 can move along the guide groove synchronously, and then the positioning pin 13 can effectively prevent the conductive connecting rod 14 from radially deviating, and the conductive connecting rod 14 can only move along the guide groove.

[0036] More specifically, the conductive connecting rod 14 is arranged in the mounting shell 112. A mounting groove for installing the conductive connecting rod 14 is opened in the mounting shell 112, and then the conductive connecting rod 14 is arranged in the mounting groove. An elastic member 15 is sleeved on the outer periphery of the conductive connecting rod 14. When the nut rotates, it first contacts the elastic pressure block 12. The elastic pressure block 12 drives the conductive connecting rod 14 to move axially. At this time, the detection surface of the nut is transmitted from the lower end of the conductive connecting rod 14 to the upper end surface, so that the position sensor 17 can monitor it in real time. In the process of nut rotation, the elastic pressure block 12 vibrates due to the force generated by the rotation of the nut. Therefore, the setting of the elastic member 15 can avoid the vibration generated by the elastic pressure block 12, thereby improving the measurement accuracy. It should be noted that the elastic member 15 can be a spring.

[0037] See also Figure 2 The displacement sensor is electrically connected to the spinning device. When the displacement sensor detects that the nut data reaches the qualified range, the displacement sensor will feed back the measurement data of the nut to the spinning device, and the spinning device will control its motor to stop and maintain the air pressure until the assembly operation is completed. Then the spinning device will automatically open the mold, and the operator will take out the shell and then add the nut, put it into the shell and enter the next cycle.

[0038] In order to facilitate the adjustment of the position of the position sensor 17, a sensor adjustment seat 19 is provided on the position sensor 17. The sensor adjustment seat 19 is connected to the position sensor 17 and can adjust the orientation of the position sensor 17 in a horizontal plane through the sensor adjustment seat 19 to compensate for the deviation caused by the nut processing and assembly.

[0039] Similarly, a positioning block adjustment seat 111 is also provided at the bottom of the support plate 110, and the positioning block adjustment seat 111 is in contact with the mounting shell 112, so that the position of the mounting shell 112 can be adjusted by the positioning block adjustment seat 111, so as to drive the horizontal position of the positioning block 11 connected to the mounting shell 112. In addition, a backstop assembly 16 is also provided between the support plate 110 and the mounting shell 112, and the backstop assembly 16 includes an adjustment rod that penetrates the support plate 110, an adjustment member that is arranged on the adjustment rod and is respectively located on the two plate surfaces of the support plate 110, and a fixed block that is arranged at the end of the adjustment rod and contacts the mounting shell 112, wherein the adjustment member is suitable for displacement along the adjustment rod to adjust the position of the pressing part. Therefore, the pressing part of the backstop assembly 16 is a long-term force unit. In order to avoid the position contraction of the pressing part after long-term operation, it is set as an adjustable fixed top dead structure, which can ensure that the position of the structure contracts after long-term operation, thereby ensuring the stability of the structure and the accuracy of the detection results. The backstop assembly 16 also includes a backstop mounting plate 18 disposed at the end of the position sensor 17, through which the position sensor 17 can be pressed to limit the position deviation of the position sensor 17 after long-term operation. Therefore, through the above-mentioned arrangement, the detection and assembly are carried out and completed simultaneously, avoiding unnecessary detection and wasting time, and the positioning during the screwing process is consistent with the positioning of the detection, without secondary positioning, ensuring that the detection result is within the tolerance range, making the detection end consistent with the data reference end, reducing unnecessary detection sensors, and reducing the cost of tooling.

[0040] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0041] The above description is based on the ideal embodiment of the utility model. Through the above description, relevant staff can make various changes and modifications without deviating from the technical concept of the utility model. The technical scope of the utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A nut screw-in position detection structure, used to cooperate with a screw-in device to detect whether the nut is in place, characterized in that: The detection mechanism (1) comprises a positioning pressure block (11), wherein an elastic pressure block (12) is arranged inside the positioning pressure block (11) and contacts one end of the elastic pressure block (12) when the nut is screwed out, and the other end of the elastic pressure block (12) is connected to a conductive connecting rod (14), and the conductive connecting rod (14) is connected to a position sensor (17), and the position sensor (17) is suitable for real-time monitoring of the assembly accuracy of the nut via the movement of the conductive connecting rod (14) to ensure that the assembly accuracy of the nut is within a qualified range.

2. The nut screwing-in position detection structure according to claim 1 is characterized in that: One end of the elastic pressure block (12) connected to the conductive connecting rod (14) is recessed inward to form a guide groove, the conductive connecting rod (14) is movably connected to the guide groove, and a positioning pin (13) is provided in the guide groove, the positioning pin (13) is suitable for limiting the conductive connecting rod (14) to be able to move only along the guide groove.

3. The nut screwing-in position detection structure according to claim 2 is characterized in that: The conductive connecting rod (14) is arranged in the mounting shell (112), and the elastic member (15) is sleeved on the conductive connecting rod (14) so ​​that when the elastic pressing block (12) drives the conductive connecting rod (14) to move axially, the elastic member (15) is suitable for alleviating the vibration of the elastic pressing block (12).

4. The nut screwing-in position detection structure according to claim 3 is characterized in that: The position sensor (17) is electrically connected to the screw-on device so that when the position sensor (17) monitors that the assembly accuracy of the nut is within a qualified range, the position sensor (17) is suitable for providing feedback to the screw-on device and keeping the motor of the screw-on device stopped and the air pressure stable.

5. The nut screwing-in position detection structure according to claim 1 is characterized in that: The elastic pressing block (12) is suitable for partially protruding out of the inner plane of the positioning pressing block (11) in a free state.

6. The nut screwing-in position detection structure according to claim 4 is characterized in that: The position sensor (17) is provided with a sensor adjustment seat (19), and the sensor adjustment seat (19) is suitable for adjusting the position of the position sensor (17) in a plane to compensate for the accuracy of nut processing and assembly.

7. The nut screwing-in position detection structure according to claim 6 is characterized in that: The position adjustment seat is arranged on a support plate (110), an adjustment hole is provided on the support plate (110), the position sensor (17) passes through the adjustment hole, and the adjustment hole is suitable for limiting the adjustment range of the position sensor (17) driven by the sensor adjustment seat (19) in the horizontal direction.

8. The nut screwing-in position detection structure according to claim 7 is characterized in that: A positioning pressure block adjustment seat (111) is also provided at the bottom of the support plate (110), and the positioning pressure block adjustment seat (111) is in contact with the installation shell (112) so that the installation shell (112) can be adjusted via the positioning pressure block adjustment seat (111) to drive the positioning pressure block (11) in a horizontal direction.

9. The nut screwing-in position detection structure according to claim 7, characterized in that: A backstop assembly (16) is also provided between the support plate (110) and the mounting shell (112), the backstop assembly (16) comprising an adjusting rod penetrating the support plate (110), an adjusting member provided on the adjusting rod and respectively located on two plate surfaces of the support plate (110), and a fixing block provided at an end of the adjusting rod and in contact with the mounting shell (112), the adjusting member being suitable for displacement along the adjusting rod so that the adjusting member respectively abuts against the upper and lower plate surfaces of the support plate (110) and fixes the mounting shell (112).

10. The nut screwing-in position detection structure according to claim 9, characterized in that: The anti-retraction assembly (16) further comprises an anti-retraction mounting plate (18) arranged at the end of the position sensor (17), wherein the anti-retraction mounting plate (18) is suitable for pressing the position sensor (17) to limit the position deviation of the position sensor (17) after long-term operation.

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