Device for quickly detecting angle of key groove

Abstract

The utility model discloses a rapid key groove angle detection device comprising a gauge plate, one side of the gauge plate is an insertion end, two side edges of the insertion end are matching side edges, the rest side is an external side edge, the distance between the matching side edges on the two sides is matched with the distance between the inner bottom walls of key grooves on the two sides, and the gauge plate is inserted between the key grooves on the two sides through the insertion end. The gauge plate is a rigid plate which is not prone to elastic deformation. The detection tool replaces a conventional detection tool, the radial size and the width size of key groove processing can be detected through one-step operation, and whether the angles of key grooves on two sides are symmetrically arranged or not can be intuitively judged according to the plugging condition. And meanwhile, the detection tool can be used for processing steps with different size requirements according to actual requirements, so that the characteristic that one tool can be used in multiple scenes can be realized, and the detection efficiency is greatly improved. In addition, the detection tool is easy to manufacture and low in manufacturing cost, and is practically applied and played in actual use.

Description

Technical Field

[0001] The utility model relates to the technical field of detection tooling, in particular to a device for quickly detecting a keyway angle. Background Art

[0002] Gears are common parts in everyday life, especially in the field of mechanical processing. As an indispensable component in mechanical transmission, the machining accuracy level of gears has a significant impact on their actual performance. Among the key parameters, the accuracy of the tooth profile and keyway often play a decisive role. For keyways, common processing methods are gear shaping and wire cutting. Regardless of the method used, keyways have their advantages and disadvantages. Therefore, keyway inspection is very important. Through inspection, qualified products can be effectively selected. However, the means of inspection are relatively limited in the current market. Usually, the width of the keyway is measured with a vernier caliper, and the size of the keyway opening is measured with a measuring rod. However, it is actually quite difficult to inspect keyways with these two tools.

[0003] like Figure 1 As shown, the keyway is symmetrically processed on both sides of the inner wall to form a double-sided keyway. The processing technology is to first process the keyway at one end, and after processing, flip it 180 degrees and use it as a reference for alignment; when processing the second keyway, the symmetry error caused by this processing method is the sum of the angle error after flipping 180 degrees and the error between the tool center and the workpiece center.

[0004] The testing method involves using the machine's own motion and its digital display to move the dial indicator longitudinally and transversely. The difference between the dial indicator's value and the digital display's value is then calculated. This method violates the principle of not using the original workpiece for testing. Furthermore, testing without the machine itself results in a lack of standard testing tools.

[0005] In view of the above, it is necessary to propose a device for quickly detecting the keyway angle to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to overcome the defects in the prior art and provide a device for quickly detecting the angle of a keyway.

[0007] To achieve the above-mentioned purpose, the technical solution of the present invention is as follows: a device for quickly detecting the angle of a keyway, comprising a gauge plate, one side of the gauge plate being an insertion end, both sides of the insertion end being mating sides, and the remaining side being an external side, the spacing between the mating sides on both sides being matched with the distance between the inner bottom walls of the keyways on both sides, the gauge plate being inserted between the keyways on both sides by the insertion end, and the gauge plate being a rigid plate that is not easily elastically deformed.

[0008] Furthermore, the thickness of the gauge plate matches the width of the key slot, and when the gauge plate is inserted into the key slot, the side surfaces of the gauge plate fit against the inner walls on both sides of the key slot.

[0009] Furthermore, the mating side is a multi-step side, and the multi-step sides on both sides are symmetrically arranged. The multi-step sides on both sides form multiple measuring sections, and the length of each measuring end matches the keyway spacing of parts of different models.

[0010] Furthermore, a U-shaped handle is provided on the external side, and a chamfer is provided at the corner of each step of the multi-step side to facilitate insertion into the keyway.

[0011] Furthermore, the periphery of the external side is provided with an outer peripheral convex edge.

[0012] Furthermore, it also includes a positioning device, which is respectively placed in the key slots on both sides, and the positioning device includes a positioning block and a plug-in seam. One side of the positioning block extends outward to form a plug-in seam, and the thickness of the gauge plate matches the inner wall spacing of the plug-in seam; the gauge plate is composed of a first plate and a second plate that are symmetrically arranged and hinged through a hinged gap, and the direction of the hinged gap is perpendicular to the external side, and the first plate and the second plate on both sides of the gauge plate are respectively inserted into the plug-in seams on both sides.

[0013] Furthermore, the first plate and the second plate are respectively provided with a laser emitting device, and the emission directions of the two laser emitting devices are the same.

[0014] Furthermore, the positioning block includes a block body, a positioning slide, a push rod, and a driving bolt. Positioning slides are arranged on both sides of the block body for vertical sliding sliding. The distal ends of the positioning slides on both sides are tightly fitted with the inner walls of the key slots. The proximal ends of the positioning slides on both sides are provided with a first bevel. The two sides of the push rod are respectively matched with the positioning bevels on both sides and are provided with a second bevel. The driving bolt is rotatably connected to the block body, and the end of the driving bolt is threadedly connected to the end of the push rod to drive it to move axially. The push rod moves axially in the block body and drives the positioning slides on both sides to be pushed out through the bevel.

[0015] The advantages and beneficial effects of the present invention are that the inspection tool replaces previous inspection tools, and can detect the radial and width dimensions of the keyway in a single operation. Furthermore, the insertion condition can be used to intuitively determine whether the angles of the keyways on both sides are symmetrical. Furthermore, since the inspection tool can be used to produce steps of different sizes according to actual needs, it can be used in multiple scenarios with one tool, greatly improving inspection efficiency. Furthermore, the inspection tool is easy to manufacture and has low production costs, making it a practical application and a real-world application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1This is a schematic diagram of the use of a device for quickly detecting keyway angles in the utility model;

[0017] Figure 2 This is a structural diagram of a device for quickly detecting keyway angles in the utility model;

[0018] Figure 3 This is a front view of a device for quickly detecting keyway angles according to the utility model;

[0019] Figure 4 This is a schematic diagram of the use of the second embodiment of the present utility model;

[0020] Figure 5 This is an exploded view of the second embodiment of the present invention;

[0021] Figure 6 This is a schematic diagram of the internal structure of the positioning device in the utility model;

[0022] Figure 7 It is a three-dimensional view and a top view of the inspection of two symmetrical keyways using the second embodiment;

[0023] Figure 8 The two asymmetric keyways are tested using a second embodiment in a three-dimensional and top view;

[0024] In the figure: 1. Gauge plate; 2. Insertion end; 3. Mating side; 4. External side; 5. Multi-step side; 6. Measuring section; 7. U-shaped handle; 8. Chamfer; 9. Peripheral ridge; 10. Positioning device; 11. Positioning block; 12. Insertion seam; 13. First plate; 14. Second plate; 15. Articulated gap; 16. Laser emitting device; 17. Block; 18. Positioning slide; 19. Push rod; 20. Drive bolt; 21. First bevel; 22. Second bevel. DETAILED DESCRIPTION

[0025] The following embodiments are used to further describe the specific embodiments of the present invention in conjunction with the accompanying drawings and examples. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Example 1:

[0026] A quick detection device for keyway angle, such as Figure 2 As shown, it includes a gauge plate 1, one side of the gauge plate 1 is an insertion end 2, both sides of the insertion end 2 are mating side edges 3, and the remaining side is an external side edge 4, as shown in FIG. Figure 3 As shown, the bottom of the figure is the insertion end 2, combined with Figure 1As shown, in this gear part, two keyways are machined relative to each other on the inner wall. During testing, the insertion end 2 of the angle detection device is inserted downward from the inner ring of the workpiece, and then the mating side edges 3 on both sides of the gauge plate 1 are respectively inserted into the corresponding two keyways, that is, the spacing between the mating side edges 3 on both sides matches the distance between the inner bottom walls of the keyways on both sides. The gauge plate 1 is inserted between the keyways on both sides by the insertion end 2. The gauge plate 1 is a steel plate that is not easily elastically deformed. Specifically, the material of the gauge plate 1 is made of a relatively good non-elastic steel material, and is appropriately heat treated to increase the hardness of the gauge plate 1. Finally, it is machined into a predetermined shape.

[0027] During manufacturing, the thickness of the gauge plate 1 matches the width of the keyway. When the gauge plate 1 is inserted into the keyway, the side surfaces of the gauge plate 1 fit against the inner walls on both sides of the keyway.

[0028] Furthermore, the mating side 3 is a multi-step side 5, symmetrically arranged on both sides. These sides form multiple measuring sections 6, with the length of each measuring end matching the keyway spacing of different part models. This makes the tool suitable for inspecting keyways of varying lengths. The number of steps in the step block should be determined based on actual needs. As an example, a single step can be used to measure only one keyway length. Alternatively, multiple steps can be used to measure multiple keyway lengths, providing flexibility.

[0029] like Figure 1 As shown, and in order to facilitate the removal of the tool from the workpiece, a U-shaped handle 7 is provided on the external side 4. Further, as shown Figure 3 As shown, in order to facilitate the insertion of the gauge plate 1 into the keyway and avoid jamming during insertion, a chamfer 8 is provided at the corner of each step of the multi-step side 5 to facilitate insertion into the keyway. In actual use, the angle between the chamfer 8 and the vertical direction can be set to 1-10 degrees. The periphery of the external side 4 is provided with an outer peripheral ridge 9 as shown in FIG. Figure 2 As shown, when the measuring section 6 on the uppermost side of the tool is used for measurement, the peripheral ridge 9 can be stuck on the outside of the keyway to prevent the gauge plate 1 from falling into the keyway. The peripheral ridge 9 can be used for limiting and preventing it from falling.

[0030] Specifically, when using, first select the required specification of the detection device according to the size of the keyway to be detected in the drawing;

[0031] Then place the part to be tested (usually a gear) on the testing workbench, requiring it to be placed stably and kept level;

[0032] Clean the keyway thoroughly to avoid residual iron chips, oil stains and other foreign matter that may affect the test results;

[0033] Finally, the keyway inspection device is slowly and horizontally placed into the keyway of the product to be inspected. The ease with which the inspection device fits in determines whether the keyway machining meets the requirements. If the tool shakes after insertion, the machined keyway dimensions are too large. If it fits easily without shaking, the machined keyway dimensions meet the requirements. If it can be inserted with force, the keyway is an interference fit. If the keyway cannot be inserted, the machined keyway dimensions and angles are incorrect. This process allows us to quickly screen qualified products. Example 2:

[0034] Since the widths of keyways are different, and the thickness of the gauge plate 1 in the first embodiment is constant, when inspecting keyways of different widths, multiple gauge plates 1 of different thicknesses must be prepared, and it is not easy to observe the angular errors of the keyways on both sides.

[0035] As an improvement to the first embodiment, Figure 4-8 As shown, it also includes a positioning device 10, which is placed in the key slots on both sides. In this embodiment, the positioning device 10 is installed in the key slot and is used to change the width according to the key slot model and be fixed therein. The positioning device 10 includes a positioning block 11 and a plug-in seam 12. In this embodiment, the positioning block 11 is fixed in the key slot, and the plug-in seam 12 is a gap formed by two parallel plates fixedly set on one side of the positioning block 11 and extending outward. The gap is for the gauge plate 1 to be inserted, that is, one side of the positioning block extends outward to form the plug-in seam 12. The thickness of the gauge plate 1 matches the inner wall spacing of the plug-in seam 12. In this way, if the width of the positioning block 11 needs to be adjusted to position it in the key slot, then the angle of the plug-in seam 12 is the same as the angle of the key slot, and the gap of the plug-in seam 12 is a fixed value, which can be conveniently matched with the gauge plate 1.

[0036] As an improvement, in this embodiment, if Figure 4 、 5 As shown, the gauge plate 1 is composed of a first plate 13 and a second plate 14 that are symmetrically arranged and hinged. The direction of the hinge gap 15 is perpendicular to the external side 4. The first plate 13 and the second plate 14 on both sides of the gauge plate 1 are respectively inserted into the insertion gap 12 on both sides. Therefore, the angle between the two plates in the gauge plate 1 in this embodiment can be changed. In actual use, when the two plates are respectively inserted into the insertion gap 12 on both sides, the angle of the plates on both sides is the same as the angle of the corresponding key slot. If the two key slots are symmetrically arranged, the two plates can form a plane, that is, the angle is 0°, as shown in FIG. Figure 7 However, when the keyways on both sides are asymmetrical, the two plates will form a certain angle, as shown in the figure. Figure 8Furthermore, the first plate 13 and the second plate 14 are provided with laser emitting devices 16, and the emission directions of the two laser emitting devices 16 are the same; in this embodiment, in order to magnify the angle formed by the two keyways and make the detection more intuitive, as shown in FIG. Figure 7 、 8 As shown, the laser emitting device 16 in this embodiment can be a laser lamp. The light emitted by the laser lamps on the two plates is projected at a distance. If they overlap each other in the vertical direction, that is, the two keyways are symmetrical, which meets the requirements. Figure 8 As shown in the figure, the light from the two laser heads separates when projected at a distance, so that we can intuitively understand that the two keyway openings form a certain angle. In actual use, according to the actual situation, within a certain projection distance, the distance between the projection points of the two lasers can be defined as a composite requirement within a certain numerical range. If it exceeds this numerical range, it does not meet the requirements.

[0037] Further, such as Figure 5 、 6 As shown, the positioning block 11 includes a block body 17, a positioning slide 18, a push rod 19, and a driving bolt 20. The interior of the block body 17 forms an installation chamber for installing the positioning slide 18, the push rod 19, and the driving bolt 20. The positioning slides 18 are arranged on both sides of the block body 17 in a vertical sliding direction. The distal ends of the positioning slides 18 on both sides are tightly fitted with the inner wall of the keyway. Figure 5 As shown, the positioning slides 18 on both sides of the block 17 are mirror-movable and retractable. When extended, the positioning slides 18 can be stuck on both sides of the key slot, and when installed, the bottom surface of the block 17 is tightly installed on the inner surface of the key slot, so that the positioning device 10 can be fixed, and the direction of the joint 12 can be made the same as the opening direction of the key slot, and the joint 12 is located in the center of the key slot.

[0038] Furthermore, the proximal ends of the positioning slide posts 18 on both sides are provided with first beveled surfaces 21, and the two sides of the push rod 19 are respectively matched with the positioning beveled surfaces on both sides and provided with second beveled surfaces 22, as shown in FIG. Figure 6 As shown, when the push rod 19 moves to the right, the second inclined surface slides relative to the first inclined surface, so that the positioning slides 18 on both sides extend outward in a mirror image, so that they can be stuck on the two side walls of the keyway and maintain a centered position; when the push rod 19 moves to the left, the positioning slide 18 can be retracted, and the positioning device 10 can be removed at this time.

[0039] Specifically, the movement of the push rod 19 is controlled by a drive bolt 20. Specifically, the drive bolt 20 is rotatably connected to the block 17, and the end of the drive bolt 20 is threadedly connected to the end of the push rod 19 to drive it to move axially. The push rod 19 moves axially within the block 17, driving the positioning slides 18 on both sides outward through the beveled surface. By controlling the rotation of the drive bolt 20, the push rod 19 can be controlled to move axially within the installation chamber, thereby fixing the positioning device 10, thereby positioning the joint 12 at the center of the keyway. The two plates are then inserted into the two joints 12 respectively. Since the plates extend outward a certain distance, the angles of the plates and the keyway can be maintained at the same level, reducing errors. The angle can then be intuitively detected by projecting a laser light spot to a distant spot.

[0040] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A device for quickly detecting keyway angles, characterized in that: The invention comprises a gauge plate (1), wherein one side of the gauge plate (1) is an insertion end (2), both sides of the insertion end (2) are mating side edges (3), and the remaining side is an external side edge (4), the spacing between the mating side edges (3) on both sides matches the distance between the inner bottom walls of the keyways on both sides, the gauge plate (1) is inserted between the keyways on both sides by the insertion end (2), and the gauge plate (1) is a rigid plate that is not easily elastically deformed.

2. A quick keyway angle detection device according to claim 1, characterized in that: The thickness of the gauge plate (1) matches the width of the keyway. When the gauge plate (1) is inserted into the keyway, the side surfaces of the gauge plate (1) fit on the inner walls on both sides of the keyway.

3. A quick keyway angle detection device according to claim 2, characterized in that: The mating side (3) is a multi-step side (5), and the multi-step side (5) on both sides is symmetrically arranged. The multi-step side (5) on both sides forms a plurality of measuring sections (6), and the length of each measuring end matches the keyway spacing of different types of parts.

4. A device for quickly detecting keyway angles according to claim 3, characterized in that: A U-shaped handle (7) is provided on the external side (4), and a chamfer (8) is provided at the corner of each step of the multi-step side (5) to facilitate insertion into the keyway.

5. The device for quickly detecting keyway angle according to claim 1, characterized in that: The periphery of the external side edge (4) is provided with an outer peripheral convex edge (9).

6. The device for quickly detecting keyway angle according to claim 1, characterized in that: The apparatus further comprises a positioning device (10), wherein the positioning device (10) is respectively placed in the key slots on both sides, and the positioning device (10) comprises a positioning block (11) and an insertion seam (12), wherein one side of the positioning block (11) extends outward to form the insertion seam (12), and the thickness of the gauge plate (1) matches the inner wall spacing of the insertion seam (12); the gauge plate (1) is composed of a first plate (13) and a second plate (14) which are symmetrically arranged and hinged through a hinged gap (15), and the direction of the hinged gap (15) is perpendicular to the external side (4), and the first plate (13) and the second plate (14) on both sides of the gauge plate (1) are respectively inserted into the insertion seams (12) on both sides.

7. The device for quickly detecting keyway angle according to claim 6, characterized in that: The first plate (13) and the second plate (14) are respectively provided with a laser emitting device (16), and the emitting directions of the two laser emitting devices (16) are the same.

8. The device for quickly detecting keyway angle according to claim 6, characterized in that: The positioning block (11) includes a block body (17), a positioning slide column (18), a push rod (19), and a driving bolt (20). Positioning slide columns (18) are vertically slidably arranged on both sides of the block body (17). The distal ends of the positioning slide columns (18) on both sides are tightly matched with the inner wall of the key groove. The proximal ends of the positioning slide columns (18) on both sides are provided with a first bevel (21). Both sides of the push rod (19) are respectively matched with the positioning bevels on both sides and are provided with a second bevel (22). The driving bolt (20) is rotatably connected to the block body (17), and the end of the driving bolt (20) is threadedly connected to the end of the push rod (19) to drive it to move axially. The push rod (19) moves axially in the block body (17) and drives the positioning slide columns (18) on both sides to be pushed out through the bevel.

Images