Detection tool for detecting metal support welded with nut
By designing a inspection tool including a detection block, a hole position detection component and a pressing mechanism, the problem in the existing technology of being unable to accurately determine the coaxiality of the metal bracket nut hole and the via hole is solved, achieving high-precision detection and reducing Operator experience requirements.
Patent Information
- Application Number
- CN202421259742.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-04
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2034-06-04
AI Technical Summary
When the existing inspection tools detect the coaxiality of the nut hole and via hole of the metal bracket, it is impossible to accurately determine whether the detection pin is in place, resulting in a high possibility of misjudgment. Especially for operators who lack experience, the inspection accuracy is more Low.
A inspection tool including a detection block, a hole position detection component and a pressing mechanism is designed. The hole position detection assembly consists of a detection pin, a pin barrel and an elastic element. After the detection pin passes through the pin barrel, it has a through hole detection section and a nut hole detection section. Through the cooperation of the pressure head and the limit sleeve, the detection pin is pressed down and release to accurately determine the coaxiality of the nut hole and the via hole.
By observing whether the lower end surface of the pressure head and the upper end surface of the limit sleeve can contact, it can be accurately judged whether the coaxiality of the nut hole and the through hole is qualified, eliminating the possibility of misjudgment, improving detection accuracy, and making the operation simple and convenient , reducing the experience requirements for operators.
Smart Images
Figure CN222378999U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of detection tools, in particular to a detection tool used for detecting a metal bracket welded with nuts. Background Art
[0002] At present, many types of metal brackets are welded with nuts to facilitate installation with bolts during use. Before the metal brackets with nuts are welded, the coaxiality of the nut holes and the corresponding through holes of the nut holes are tested to ensure the smooth assembly of the bolts.
[0003] When using existing inspection tools to inspect the coaxiality of the nut holes and through holes of a metal bracket, the operator cannot see with the naked eye from a normal perspective whether the outer end of the inspection pin has passed through the through hole and is located in the nut hole, which results in extremely high requirements on the operator's experience. The operator is required to judge whether the inspection pin is in place based on the moving distance of the inspection pin, which inevitably leads to misjudgment. Especially for inexperienced operators, the inspection accuracy is even lower.
[0004] Solving the above problems has become a top priority. Utility Model Content
[0005] In order to solve the technical problem that the existing inspection tool cannot accurately determine whether the inspection pin is in place when inspecting the coaxiality of the nut hole and the through hole of the metal bracket, the utility model provides a inspection tool for inspecting the metal bracket with the nut welded thereon.
[0006] The technical solution is as follows:
[0007] The first aspect of the present application relates to a gauge for detecting a metal bracket welded with a nut, comprising a gauge base, a bracket positioning platform for placing the metal bracket and at least one clamping mechanism for locking the metal bracket on the bracket positioning platform, a detection block mounting seat is provided on the gauge base, a detection block that can rotate along the detection block mounting seat is installed on the detection block mounting seat, and at least one hole position detection component is installed on the part of the detection block that can rotate to above the bracket positioning platform, and the hole position detection component includes a pin barrel installed in the corresponding pin hole of the detection block, a detection pin that can axially slide and penetrate the pin barrel, and an elastic An elastic element supported between the pin barrel and the detection pin, the elastic element is used to drive the detection pin away from the bracket positioning platform, and the detection pin has a through-hole detection section and a nut hole detection section both of which are cylindrical structures after passing through the pin barrel at one end close to the bracket positioning platform, and the nut hole detection section is coaxially reduced in diameter and formed on the outer end surface of the through-hole detection section, and a limiting sleeve is sleeved on the end of the detection pin away from the bracket positioning platform after passing through the pin barrel, and the inner end of the limiting sleeve is supported on the detection block, and a pressure head is installed at the end of the detection pin passing through the pin barrel, and the outer diameter of the pressure head is larger than the outer diameter of the limiting sleeve. Pressing or releasing the detection pin can make the pressure head approach or move away from the limiting sleeve.
[0008] When the above-mentioned inspection fixture is used to inspect a metal bracket welded with a nut, when the inspection pin is pressed down and the lower end face of the pressure head can be abutted against the upper end face of the limiting sleeve, it can be explained that the nut hole inspection section is located in the nut hole of the welded nut of the metal bracket, and that the coaxiality of the nut hole and the through hole is qualified; when the inspection pin is pressed down and the lower end face of the pressure head cannot be abutted against the upper end face of the limiting sleeve, it means that the nut hole inspection section cannot be inserted into the nut hole, and the coaxiality of the nut hole and the through hole is unqualified.
[0009] Therefore, when using the inspection fixture to detect the coaxiality of the nut hole and the through hole of the metal bracket, it is only necessary to observe whether the lower end face of the pressure head and the upper end face of the limit sleeve can be abutted when pressing down the detection pin, so as to accurately judge whether the coaxiality of the nut hole and the through hole is qualified, thereby eliminating the possibility of misjudgment and improving the accuracy of the inspection fixture. At the same time, the operation is simple and convenient, and it no longer relies on the operator's use and inspection experience, reducing the requirements for the operator.
[0010] In some embodiments, the elastic element is a reset spring adapted to both the pressure head and the pin barrel, and the two ends of the reset spring are elastically supported on the end faces of the pressure head and the pin barrel that are close to each other, and the end of the detection pin close to the bracket positioning platform passes through the pin barrel and expands to form a limiting stop ring, which is located at the end of the through-hole detection section away from the nut hole detection section, and the outer diameter of the limiting stop ring is larger than the outer diameter of the end face of the pin barrel close to the bracket positioning platform and the outer diameter of the through-hole detection section.
[0011] In some embodiments, the limiting sleeve is in a cylindrical structure and coaxially surrounds the outside of the detection pin, thereby forming a compression spring accommodating gap that is compatible with the reset compression spring together with the detection pin, and the reset compression spring is installed in the compression spring accommodating gap.
[0012] In some embodiments, the detection block includes a rotating arm that can be rotatably mounted on a detection block mounting base and a detection block body that is detachably mounted on the outer end of the rotating arm, a holding block is mounted on the rotating arm, and each pin hole is opened on the detection block body.
[0013] In some embodiments, the clamping mechanism is a quick clamp, and there are multiple sets of quick clamps, each set of quick clamps is circumferentially arranged around the bracket positioning platform.
[0014] In some embodiments, the support positioning platform is provided with a plurality of positioning protrusions protruding upward.
[0015] In some embodiments, a go / no-go gauge bracket is provided on the inspection fixture base, and a go / no-go gauge for detecting whether the gap between the metal bracket and the inspection block body is qualified is detachably mounted on the go / no-go gauge bracket. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a structural diagram of the inspection fixture;
[0017] Figure 2 It is a schematic diagram of the three-dimensional structure of the detection block mounting base, the detection block, the hole position detection assembly, the bracket positioning platform and the metal bracket when the pressure head is pressed;
[0018] Figure 3 It is a cross-sectional view of the detection block mounting base, the detection block, the hole detection assembly, the bracket positioning table and the metal bracket when the pressure head is pressed;
[0019] Figure 4 It is a cross-sectional view of the detection block mounting base, the detection block, the hole detection assembly, the bracket positioning table and the metal bracket when the pressure head is released;
[0020] Figure 5 Schematic diagram of the structure of the metal bracket. DETAILED DESCRIPTION
[0021] The utility model is further described below in conjunction with embodiments and drawings.
[0022] like Figure 1-Figure 5 As shown, a gauge for detecting a metal bracket welded with a nut mainly includes a gauge base 2, a bracket positioning platform 3, a detection block mounting seat 5, a detection block 6, at least one set of clamping mechanism 4 and at least one set of hole position detection assembly 7.
[0023] Among them, the bracket positioning platform 3 and each clamping mechanism 4 are both installed on the inspection fixture base 2, the bracket positioning platform 3 is used to place and position the metal bracket 1 to be inspected, and each clamping mechanism 4 is used to lock (press) the metal bracket 1 to be inspected on the bracket positioning platform 3.
[0024] In this embodiment, the clamping mechanism 4 is a quick clamp, and there are multiple sets of quick clamps, each set of which is arranged circumferentially around the bracket positioning platform 3, which can not only reliably clamp the metal bracket 1 to be tested on the bracket positioning platform 3, but also is easy to operate.
[0025] The detection block mounting seat 5 is installed on the inspection fixture base 2, and a detection block 6 that can rotate along the detection block mounting seat 5 is installed on the detection block mounting seat 5. The part of the detection block 6 that can rotate to the top of the bracket positioning platform 3 is installed with at least one set of hole position detection components 7, that is, the detection block 6 can rotate along the detection block mounting seat 5, and part of the detection block 6 can rotate to the top of the bracket positioning platform 3, and each hole position detection component 7 is located at the part of the detection block 6 that can rotate to the top of the bracket positioning platform 3, so that the coaxiality of the through hole 1a of the metal bracket 1 and the nut hole of the welding nut 1b can be detected by the hole position detection component 7.
[0026] Specifically, the detection block 6 can be rotated to the part above the bracket positioning platform 3, and a pin hole 6a1 corresponding to each hole position detection component 7 is opened. The hole position detection component 7 includes a pin barrel 7a installed in the corresponding pin hole 6a1, a detection pin 7b that can be axially slidably inserted into the pin barrel 7a, and an elastic element 7c elastically supported between the pin barrel 7a and the detection pin 7b. The elastic element 7c is used to drive the detection pin 7b away from the bracket positioning platform 3. After the end of the detection pin 7b close to the bracket positioning platform 3 passes through the pin barrel 7a, it has a The through-hole detection section 7b1 and the nut hole detection section 7b2 are cylindrical in structure, and the nut hole detection section 7b2 is coaxially reduced in diameter and formed on the outer end face of the through-hole detection section 7b1. The end of the detection pin 7b away from the bracket positioning platform 3 passes through the pin tube 7a and is covered with a limiting sleeve 7b5. The inner end of the limiting sleeve 7b5 is supported on the detection block 6, and the limiting sleeve 7b5 will not rise or fall with the detection pin 7b. The end of the detection pin 7b passing through the pin tube 7a is equipped with a pressure head 7b3, and the outer diameter of the pressure head 7b3 is larger than the outer diameter of the limiting sleeve 7b5.
[0027] Therefore, when the detection pin 7b is pressed down and the lower end face of the pressure head 7b3 can be abutted against the upper end face of the limiting sleeve 7b5, it can be shown that the nut hole detection section 7b2 is located in the nut hole of the welding nut 1b of the metal bracket 1, and the coaxiality between the nut hole and the through hole 1a is qualified. When the detection pin 7b is pressed down and the lower end face of the pressure head 7b3 cannot be abutted against the upper end face of the limiting sleeve 7b5, it means that the nut hole detection section 7b2 cannot be inserted into the nut hole, and the coaxiality between the nut hole and the through hole 1a is unqualified.
[0028] Therefore, when the inspection tool is used to detect the coaxiality of the nut hole and the through hole 1a of the metal bracket 1, it is only necessary to observe whether the lower end surface of the pressure head 7b3 and the upper end surface of the limiting sleeve 7b5 can abut when the inspection pin 7b is pressed down, so as to accurately judge whether the coaxiality of the nut hole and the through hole 1a is qualified, thereby eliminating the possibility of misjudgment and improving the accuracy of the inspection tool. At the same time, the operation is simple and convenient, and it no longer depends on the operator's use and inspection experience, thereby reducing the requirements for the operator.
[0029] It should be noted that when the detection pin 7b is released, the elastic element 7c can make the pressure head 7b3 move away from the limiting sleeve 7b5.
[0030] The elastic element 7c is a return compression spring adapted to both the pressure head 7b3 and the pin barrel 7a, and the two ends of the return compression spring are elastically supported on the end faces of the pressure head 7b3 and the pin barrel 7a that are close to each other, that is, the return compression spring is sleeved on the detection pin 7b, and one end of the return compression spring abuts against the end of the pressure head 7b3 close to the pin barrel 7a, and the other end abuts against the end of the pin barrel 7a close to the pressure head 7b3, which not only ensures the reliability of the installation of the return compression spring, but also facilitates the operator to press the pressure head 7b3 to achieve the downward pressure of the detection pin 7b.
[0031] At the same time, the end of the detection pin 7b near the bracket positioning platform 3 passes through the pin barrel 7a and expands to form a limited stop ring 7b4. The limited stop ring 7b4 is located at the end of the through-hole detection section 7b1 away from the nut hole detection section 7b2, and the outer diameter of the limited stop ring 7b4 is larger than the outer diameter of the end face of the pin barrel 7a near the bracket positioning platform 3 and the outer diameter of the through-hole detection section 7b1. Therefore, when the operator releases the pressure head 7b3, the reset compression spring drives the detection pin 7b away from the bracket positioning platform 3, that is, separates from the metal bracket 1. By setting the limited stop ring 7b4, the maximum upward movement height of the detection pin 7b is limited by the limited stop ring 7b4, which can prevent the detection pin 7b from falling out, and ensure the reliability of the installation of the hole detection component 7.
[0032] Correspondingly, the limiting sleeve 7b5 has a cylindrical structure and coaxially surrounds the outer side of the detection pin 7b, thereby forming a compression spring accommodating gap 7d that is compatible with the reset compression spring together with the detection pin 7b. The reset compression spring is installed in the compression spring accommodating gap 7d close to the pressure head 7b3, further improving the reliability of the installation of the reset compression spring and the reliability of the installation of the limiting sleeve 7b5.
[0033] In this embodiment, the detection block 6 includes a rotating arm 6b that can be rotatably mounted on the detection block mounting base 5 and a detection block body 6a that is detachably mounted on the outer end of the rotating arm 6b. A holding block 6c is mounted on the rotating arm 6b. Each pin hole 6a1 is opened on the detection block body 6a, so that the rotating arm 6b and the hole position detection component 7 thereon can be adaptively replaced according to the metal bracket 1, thereby improving the versatility of the inspection fixture.
[0034] Correspondingly, the support positioning platform 3 can also be detachably mounted on the gauge base 2 , so that the support positioning platform 3 can be adaptively replaced according to the metal support 1 , thereby improving the versatility of the gauge.
[0035] In this embodiment, a plurality of upwardly protruding positioning protrusions 3a are provided on the bracket positioning platform 3, and each positioning protrusion 3a is respectively matched with the positioning hole 1c of the metal bracket 1. When the metal bracket 1 is placed on the bracket positioning platform 3, each positioning protrusion 3a is respectively embedded in the corresponding positioning hole 1c, thereby ensuring the accuracy of the positioning of the metal bracket 1 and achieving an error-proofing effect.
[0036] Meanwhile, a plurality of rubber pads 3 b are provided on the bracket positioning platform 3 , and the metal bracket 1 is supported on each rubber pad 3 b , which can prevent the metal bracket 1 from being damaged by rapid clamping and over-pressing.
[0037] A go / no-go gauge bracket 8 is provided on the inspection fixture base 2, and a go / no-go gauge 9 is detachably mounted on the go / no-go gauge bracket 8 for detecting whether the gap between the metal bracket 1 and the inspection block main body 6a is qualified, that is, the go / no-go gauge 9 detects whether the gap between the lower surface of the inspection block main body 6a and the upper surface of the metal bracket 1 is qualified, so that the go / no-go gauge 9 can be used to detect the shape of each key position of the metal bracket 1, which is simple and convenient.
[0038] Furthermore, handles 2a are provided at both ends of the gauge base 2 to facilitate overall carrying. At the same time, a plurality of rubber support feet 2b are provided at the bottom of the gauge base 2 to ensure the stability of the entire gauge.
[0039] The operation method of this spacing is as follows:
[0040] Step 1: Clean the inspection tool, place the metal bracket 1 to be tested on the bracket positioning platform 3, and embed each positioning protrusion 3a into the corresponding positioning hole 1c.
[0041] Step 2: Press down each quick clamp to completely fix the metal bracket 1 to be tested.
[0042] Step 3: Rotate the detection block 6, and then press the corresponding detection pin 7b. If the detection pin 7b is successfully inserted, that is, the lower end surface of the pressure head 7b3 can abut against the upper end surface of the limiting sleeve 7b5, the coaxiality of the nut hole and the through hole 1a is qualified, otherwise it is unqualified.
[0043] Step 4: Use the corresponding go / no-go gauge 9 to plug the detection gap between the lower surface of the detection block body 6a and the upper surface of the metal bracket 1. If the through end is through and the stop end is stopped, it is qualified, otherwise it is unqualified.
[0044] Step 5: After the detection is completed, rotate the detection block 6 in the opposite direction, open each quick clamp, and remove the metal bracket 1.
[0045] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make a variety of similar expressions without violating the purpose and claims of the present invention, and such changes fall within the scope of protection of the present invention.
Claims
1. A test fixture for testing a metal bracket welded with a nut, comprising a test fixture base (2), the test fixture base (2) being provided with a bracket positioning platform (3) for placing the metal bracket (1) and at least one set of clamping mechanisms (4) for locking the metal bracket (1) on the bracket positioning platform (3), characterized in that: The inspection fixture base (2) is provided with an inspection block mounting seat (5), on which an inspection block (6) capable of rotating along the inspection block mounting seat (5) is mounted, and the portion of the inspection block (6) capable of rotating to above the bracket positioning platform (3) is mounted with at least one set of hole position detection components (7), the hole position detection components (7) each comprising a pin barrel (7a) mounted in a corresponding pin hole (6a1) of the inspection block (6), an inspection pin (7b) axially slidably inserted into the pin barrel (7a), and an elastic element (7c) elastically supported between the pin barrel (7a) and the inspection pin (7b), the elastic element (7c) being used to drive the inspection pin (7b) away from the bracket positioning platform (3), and the inspection pin (7b) being close to the bracket positioning platform (3). After one end of the detection pin (7b) passes through the pin barrel (7a), it has a through-hole detection section (7b1) and a nut hole detection section (7b2) both of which are cylindrical structures. The nut hole detection section (7b2) is coaxially reduced in diameter and formed on the outer end surface of the through-hole detection section (7b1). After the end of the detection pin (7b) away from the bracket positioning platform (3) passes through the pin barrel (7a), a limiting sleeve (7b5) is placed on the outer sleeve. The inner end of the limiting sleeve (7b5) is supported on the detection block (6). The end of the detection pin (7b) passing through the pin barrel (7a) is equipped with a pressure head (7b3). The outer diameter of the pressure head (7b3) is larger than the outer diameter of the limiting sleeve (7b5). Pressing or releasing the detection pin (7b) can make the pressure head (7b3) approach or move away from the limiting sleeve (7b5).
2. A test fixture for testing a metal bracket welded with a nut according to claim 1, characterized in that: The elastic element (7c) is a reset spring adapted to the pressure head (7b3) and the pin barrel (7a), and the two ends of the reset spring are elastically supported on the end faces of the pressure head (7b3) and the pin barrel (7a) close to each other. The end of the detection pin (7b) close to the bracket positioning platform (3) passes through the pin barrel (7a) and then expands to form a limit stop ring (7b4). The limit stop ring (7b4) is located at the end of the through hole detection section (7b1) away from the nut hole detection section (7b2), and the outer diameter of the limit stop ring (7b4) is larger than the outer diameter of the end face of the pin barrel (7a) close to the bracket positioning platform (3) and the outer diameter of the through hole detection section (7b1).
3. A test fixture for testing a metal bracket welded with a nut according to claim 2, characterized in that: The limiting sleeve (7b5) is of cylindrical structure and coaxially surrounds the outside of the detection pin (7b), thereby forming a compression spring accommodating slot (7d) matched with the detection pin (7b), and the reset compression spring is installed in the compression spring accommodating slot (7d).
4. A test fixture for testing a metal bracket welded with a nut according to claim 1, characterized in that: The detection block (6) comprises a rotating arm (6b) rotatably mounted on a detection block mounting seat (5) and a detection block body (6a) detachably mounted on the outer end of the rotating arm (6b), a holding block (6c) being mounted on the rotating arm (6b), and each pin hole (6a1) is provided on the detection block body (6a).
5. A test fixture for testing a metal bracket welded with a nut according to claim 1, characterized in that: The clamping mechanism (4) is a quick clamp, and there are a plurality of sets of quick clamps, each set of which is arranged around the bracket positioning platform (3) along the circumferential direction.
6. A test fixture for testing a metal bracket welded with a nut according to claim 1, characterized in that: The support positioning platform (3) is provided with a plurality of positioning protrusions (3a) protruding upwards.
7. A test fixture for testing a metal bracket welded with nuts according to claim 4, characterized in that: The inspection fixture base (2) is provided with a go / no-go gauge bracket (8), on which a go / no-go gauge (9) for detecting whether the gap between the metal bracket (1) and the inspection block body (6a) is qualified is detachably mounted.