Checking fixture for detecting countersunk step height

Abstract

The invention discloses a gauge for detecting the step height of a countersunk hole, comprising a base, a positioning assembly, a driving assembly and a measuring assembly. The positioning assembly is arranged on the base, comprising a positioning shaft extending along a first direction, the positioning shaft having a positioning end and an operating end arranged relatively, the driving assembly driving the positioning shaft to move, the measuring assembly comprising a displacement indicating structure and a measuring block. When measuring, zeroing measurement is first performed, that is, the zeroing operation is achieved by measuring the step surface of the countersunk hole of a standard part, the positioning shaft is driven to move by the driving assembly, the positioning end of the positioning shaft is extended into the countersunk hole of the part to be measured, the positioning shaft is moved until the abutting surface on the positioning shaft abuts against the step surface of the countersunk hole, the measurement is completed, because the measuring block is fixedly installed on the positioning shaft, the movement of the positioning shaft will drive the measuring block to move, the displacement of the positioning shaft movement is measured by the displacement indicating structure to obtain the displacement of the positioning shaft movement, the step height of the countersunk hole of the part to be measured is quickly measured, and the detection efficiency of the part to be measured is improved.

Description

Technical Field

[0001] The invention relates to the technical field of product detection, and in particular to a detection tool for detecting the step height of a countersunk hole. Background Art

[0002] In order to ensure the size of the countersink step, the countersink step of parts with countersinks is generally expressed in terms of its height. During the production process, in order to ensure that no defective products flow out, the countersink step height of the parts will be randomly inspected or fully inspected.

[0003] At present, the general method for detecting the height of the countersunk hole is three-coordinate detection. This detection method is relatively cumbersome and time-consuming. It is suitable for general random inspections, but once a full inspection is required, the long detection time will not only affect the production cycle of the product, but also increase the production cost. Summary of the invention

[0004] The main purpose of the present invention is to provide a detection tool for detecting the step height of a countersunk hole, aiming to simplify the detection method and improve the detection efficiency of the step surface of the countersunk hole.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a gauge for detecting the step height of a countersunk hole, comprising:

[0006] Base,

[0007] A positioning assembly is provided on the base, comprising a positioning shaft extending along a first direction, the positioning shaft being movably mounted on the base along the first direction, the positioning shaft having a positioning end and an operating end which are arranged opposite to each other, the positioning end being used to extend into a counterbore of a part to be measured, and the positioning end being arranged in a stepped manner to form an abutment surface which is away from the operating end;

[0008] A driving assembly, mounted on the base, drivingly connected to the operating end, so as to drive the positioning shaft to move so that the abutting surface moves to abut against the step surface of the counterbore of the part to be measured;

[0009] The measuring assembly comprises a displacement indicating structure and a measuring block, wherein the measuring block is fixedly mounted on the positioning shaft, and the displacement indicating structure is mounted on the base and is used to measure the displacement of the measuring block.

[0010] Optionally, the positioning assembly further includes a support member, the support member is mounted on the base, the support member is formed with an installation cavity extending along the first direction, and the installation cavity is used for movably mounting the positioning shaft.

[0011] Optionally, the support member is a linear bearing.

[0012] Optionally, the driving assembly includes a driving rod extending along the first direction, the driving rod having a holding end and a connecting end relatively arranged, the driving rod is movably mounted on the base along the first direction, the holding end of the driving rod is for an operator to hold, and the connecting end of the driving rod is detachably connected to the operating end of the positioning shaft.

[0013] Optionally, the operating end of the positioning shaft is provided with a threaded hole along the first direction;

[0014] The side wall surface of the connecting end of the driving rod is provided with an external thread matched with the threaded hole, and the connecting end of the driving rod is threadedly connected with the operating end of the positioning shaft.

[0015] Optionally, a support block is provided on the base, and a through hole is provided on the support block;

[0016] The connecting end of the driving rod passes through the through hole and is connected to the positioning shaft. A return spring is sleeved on the outer surface of the driving rod. The return spring is located between the support block and the support member.

[0017] Optionally, a guide structure is further arranged between the positioning shaft and the base, and the guide structure includes a guide groove extending along the first direction and a guide protrusion adapted to the guide groove, and one of the guide groove and the guide protrusion is arranged on the positioning shaft, and the other is arranged on the base.

[0018] Optionally, the gauge for detecting the countersunk step height further includes a positioning portion, which is mounted on the base and is used to position and fix the part to be measured.

[0019] Optionally, the displacement indicating structure comprises a dial indicator, the dial indicator is located at one side of the positioning shaft and is fixedly mounted on the base, and the measuring rod of the dial indicator is extended along the first direction;

[0020] The measuring block has a mounting end and an abutting end which are arranged opposite to each other. The mounting end is mounted on the positioning shaft, and the abutting end is used to abut against the measuring rod of the dial indicator.

[0021] Optionally, the mounting end of the measuring block is detachably mounted to the positioning shaft.

[0022] In the technical solution provided by the present invention, when performing measurement, zeroing measurement is first performed, that is, the zeroing operation is achieved by measuring the step surface of the countersunk hole of the standard part, the positioning shaft is driven to move by the driving component, and the positioning end is extended into the countersunk hole of the part to be measured. When the positioning shaft moves until the abutment surface abuts against the step surface of the countersunk hole, the measurement is completed. Because the measuring block is fixedly mounted on the positioning shaft, the movement of the positioning shaft will drive the measuring block to move. The displacement of the positioning shaft movement is obtained by measuring the displacement of the measuring block through the displacement indicating structure, thereby quickly measuring the step height of the countersunk hole of the part to be measured, simplifying the detection method, and improving the detection efficiency of the part to be measured. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0024] Figure 1 A schematic structural diagram of an embodiment of a checking tool for checking the step height of a countersunk hole provided by the present invention;

[0025] Figure 2 for Figure 1 Schematic cross-sectional view of the inspection fixture for detecting the step height of the countersunk hole.

[0026] Description of Figure Numbers:

[0027] Label name Label name 100 Checking fixture for detecting countersunk step height 411 Dial indicator 1 Base 4111 Measuring rod 11 Support block 42 Measuring block 21 Positioning axis 5 Return spring 22 Support 61 Guide groove 31 Drive rod 62 Guide protrusion 4 Measuring components 7 Positioning Department 41 Displacement indication structure

[0028] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0031] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0032] In order to ensure the size of the countersink step, the countersink step of parts with countersinks is generally expressed in terms of its height. During the production process, in order to ensure that no defective products flow out, the countersink step height of the parts will be randomly inspected or fully inspected.

[0033] At present, the general method for detecting the height of the countersunk hole is three-coordinate detection. This detection method is relatively cumbersome and time-consuming. It is suitable for general random inspections, but once a full inspection is required, the long detection time will not only affect the production cycle of the product, but also increase the production cost.

[0034] The present invention provides a gauge 100 for detecting the step height of a countersunk hole, wherein: Figure 1 to Figure 2 A schematic structural diagram of an embodiment of a checking fixture for checking the step height of a countersunk hole provided by the present invention.

[0035] See also Figure 1 to Figure 2 The gauge 100 for detecting the step height of the countersink includes: a base 1, a positioning assembly, a driving assembly and a measuring assembly 4. The positioning assembly is arranged on the base 1, and includes a positioning shaft 21 extending along a first direction. The positioning shaft 21 is movably installed on the base 1 along the first direction. The positioning shaft 21 has a positioning end and an operating end that are relatively arranged. The positioning end is used to extend into the countersink of the part 1000 to be measured. The positioning end is arranged in a step to form an abutment surface away from the operating end. The driving assembly is installed on the base 1 and is drivingly connected to the operating end to drive the positioning shaft 21 to move, so that the abutment surface moves to abut against the step surface of the countersink of the part 1000 to be measured. The measuring assembly 4 includes a displacement indicating structure 41 and a measuring block 42. The measuring block 42 is fixedly installed on the positioning shaft 21. The displacement indicating structure 41 is installed on the base 1 to measure the displacement of the measuring block 42.

[0036] In the technical solution of the present application, when performing measurement, zeroing measurement is first performed, that is, the zeroing operation is achieved by measuring the step surface of the countersunk hole of the standard part, and the positioning shaft 21 is driven to move by the driving assembly to extend the positioning end into the countersunk hole of the part 1000 to be measured. When the positioning shaft 21 moves until the abutment surface abuts against the step surface of the countersunk hole, the measurement is completed. Because the measuring block 42 is fixedly mounted on the positioning shaft 21, the movement of the positioning shaft 21 will drive the measuring block 42 to move. The displacement of the measuring block 42 is measured by the displacement indicating structure 41 to obtain the displacement of the positioning shaft 21, thereby quickly measuring the step height of the countersunk hole of the part 1000 to be measured, simplifying the detection method, and improving the detection efficiency of the part 1000 to be measured.

[0037] Specifically, the displacement indicating structure 41 includes a dial indicator 411, which is located on one side of the positioning shaft 21 and fixedly installed on the base 1, and the measuring rod 4111 of the dial indicator 411 is extended along the first direction, and the measuring block 42 has a mounting end and a butt end relatively set, and the mounting end is installed on the positioning shaft 21, and the butt end is used to abut with the measuring rod 4111 of the dial indicator 411. In this way, when the measuring block 42 moves with the positioning shaft 21, the positioning shaft 21 drives the measuring block 42 to move, so that the abutment end of the measuring block 42 abuts with the measuring rod 4111 of the dial indicator 411, thereby obtaining the displacement of the positioning shaft 21, thereby detecting the height of the countersunk step surface of the part 1000 to be measured.

[0038] It should be noted that before the detection, a zeroing operation is required. Specifically, the step surface of the countersunk hole of a standard part is detected by a gauge, and then the dial indicator 411 is zeroed, and then the countersunk hole of the part 1000 to be measured is measured.

[0039] Reference Figure 1 The mounting end of the measuring block 42 is detachably mounted on the positioning shaft 21. This arrangement facilitates replacement of the positioning shaft 21 or the measuring block 42 as needed, and is simple to operate and has good effects.

[0040] Reference Figure 2 The positioning assembly also includes a support member 22, which is installed on the base 1. The support member 22 forms an installation cavity extending along the first direction, and the installation cavity is used for the movable installation of the positioning shaft 21. Such an arrangement allows the positioning shaft 21 to move smoothly and effectively.

[0041] Specifically, the support member 22 is a linear bearing. This configuration reduces the resistance of the positioning shaft 21 to the movement of the support member 22, which has a good effect.

[0042] There are many ways to drive the positioning shaft 21 to move, such as through a cylinder, a hydraulic cylinder, a ball screw, etc. Specifically, in an embodiment of the present application, the driving assembly includes a driving rod 31 extending along the first direction, and the driving rod 31 has a holding end and a connecting end relatively arranged, and the driving rod 31 is movably installed on the base 1 along the first direction. The operator holds the holding end of the driving rod 31 to push or pull the positioning shaft 21 to move, thereby driving the positioning shaft 21 to move, and the connecting end of the driving rod 31 is detachably connected to the operating end of the positioning shaft 21. With this arrangement, different sizes of positioning shafts 21 and different sizes of driving rods 31 can be selected to cooperate, and it is also convenient for the disassembly and assembly of the inspection fixture, with good effect.

[0043] Specifically, there are many ways to achieve the detachable nature of the positioning shaft 21 and the driving rod 31, for example, by means of snap-fitting through a snap-fitting slot, or by means of magnetically fitting magnetic parts and fitting parts that fit together magnetically, etc. Specifically, in an embodiment of the present application, the operating end of the positioning shaft 21 is provided with a threaded hole along the first direction, and the side wall surface of the connecting end of the driving rod 31 is provided with an external thread that matches the threaded hole, and the connecting end of the driving rod 31 is threadedly connected to the operating end of the positioning shaft 21. With this arrangement, the connection is stable and easy to disassemble and assemble.

[0044] Reference Figure 2 A support block 11 is provided on the base 1, and a through hole is provided on the support block 11. The connecting end of the driving rod 31 passes through the through hole and is connected to the positioning shaft 21. A reset spring 5 is sleeved on the outer surface of the driving rod 31, and the reset spring 5 is located between the support block 11 and the support member 22. With such a configuration, the positioning shaft 21 can be reset, and the operation is simple.

[0045] In order to improve the measurement accuracy, a guide structure is further arranged between the positioning shaft 21 and the base 1, and the guide structure includes a guide groove 61 extending along the first direction and a guide protrusion 62 adapted to the guide groove 61. One of the guide groove 61 and the guide protrusion 62 is arranged on the positioning shaft 21, and the other is arranged on the base 1. In this arrangement, the guide protrusion 62 slides in the guide groove 61, so that the positioning shaft 21 can move accurately along the first direction, thereby avoiding shaking of the positioning shaft 21 during movement, thereby improving the measurement accuracy.

[0046] Reference Figure 2The gauge 100 for detecting the countersink step height also includes a positioning portion 7, which is installed on the base 1. The part to be measured 1000 is positioned and fixed by the positioning portion 7, so that the positioning shaft 21 is inserted into the countersink of the part to be measured 1000 to measure the countersink step surface, and the effect is good.

[0047] It should be noted that the positioning portion 7 can be set as needed. For example, the positioning portion 7 can be a positioning slot. Specifically, in the present application, the positioning portion 7 is a mounting shaft. Since the measuring part 1000 has a through hole, the part to be measured 1000 is mounted on the mounting shaft through the through hole, thereby realizing the positioning installation of the part to be measured. In this way, the operation is simple.

[0048] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A gauge for detecting the step height of a countersunk hole, characterized in that: include: Base, A positioning assembly is provided on the base, comprising a positioning shaft extending along a first direction, the positioning shaft being movably mounted on the base along the first direction, the positioning shaft having a positioning end and an operating end which are arranged opposite to each other, the positioning end being used to extend into a counterbore of a part to be measured, and the positioning end being arranged in a stepped manner to form an abutment surface which is away from the operating end; A driving assembly, mounted on the base and drivingly connected to the operating end, so as to drive the positioning shaft to move so that the abutting surface moves to abut against the step surface of the counterbore of the part to be measured; A measuring assembly, comprising a displacement indicating structure and a measuring block, wherein the measuring block is fixedly mounted on the positioning shaft, and the displacement indicating structure is mounted on the base, and is used to measure the displacement of the measuring block; A guide structure is further provided between the positioning shaft and the base, the guide structure comprising a guide groove extending along the first direction and a guide protrusion matched with the guide groove, one of the guide groove and the guide protrusion is provided on the positioning shaft, and the other is provided on the base; The inspection tool for detecting the countersunk hole step height also includes a positioning part, which is installed on the base and is used to position and fix the part to be measured.

2. The inspection tool for detecting the step height of a countersunk hole according to claim 1, characterized in that: The positioning assembly further includes a support member, which is mounted on the base. The support member is formed with an installation cavity extending along the first direction, and the installation cavity is used for movably mounting the positioning shaft.

3. The inspection tool for detecting the step height of a countersunk hole as claimed in claim 2, characterized in that: The supporting member is a linear bearing.

4. The inspection tool for detecting the step height of a countersunk hole according to claim 1, characterized in that: The driving assembly includes a driving rod extending along the first direction, the driving rod having a holding end and a connecting end relatively arranged, the driving rod is movably mounted on the base along the first direction, the holding end of the driving rod is for an operator to hold, and the connecting end of the driving rod is detachably connected to the operating end of the positioning shaft.

5. The inspection tool for inspecting the step height of a countersunk hole as claimed in claim 4, characterized in that: The operating end of the positioning shaft is provided with a threaded hole along the first direction; The side wall surface of the connecting end of the driving rod is provided with an external thread matched with the threaded hole, and the connecting end of the driving rod is threadedly connected with the operating end of the positioning shaft.

6. The inspection tool for inspecting the step height of a countersunk hole as claimed in claim 4, characterized in that: A support block is provided on the base, and a through hole is provided on the support block; The connecting end of the driving rod passes through the through hole and is connected to the positioning shaft. A return spring is sleeved on the outer surface of the driving rod. The return spring is located between the support block and the support member.

7. The inspection tool for inspecting the step height of a countersunk hole according to claim 1, characterized in that: The displacement indicating structure comprises a dial indicator, which is located at one side of the positioning shaft and fixedly mounted on the base, and the measuring rod of the dial indicator is extended along the first direction; The measuring block has a mounting end and an abutting end which are arranged opposite to each other. The mounting end is mounted on the positioning shaft, and the abutting end is used to abut against the measuring rod of the dial indicator.

8. The inspection tool for inspecting the step height of a countersunk hole as claimed in claim 7, characterized in that: The mounting end of the measuring block is detachably mounted on the positioning shaft.

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