Detection device

Abstract

The present invention relates to a detection device, which is used to detect the tooth fillet angle of a transmission. The detection device includes: a device body, an observation slot is provided on the device body, and the observation slot penetrates the device body along the axial direction of the device body; the observation slot can contain two tooth fillets of a part to be detected, and the groove walls on opposite sides of the observation slot in the circumferential direction of the device body form two comparison surfaces. The above-mentioned detection device includes a device body, and the device body is provided with an observation slot. The operator can judge whether the tooth fillet angle of the part to be detected meets the requirements by observing the relationship between the two comparison surfaces of the observation slot and the two ridges of the two tooth fillets of the part to be detected located in the observation slot. In addition, the positional relationship between the observation slot and the ridges of the tooth fillet angle of the part to be detected can be adjusted by rotating the device body, which is convenient for the operator to observe and is conducive to improving the detection efficiency. The detection device provided by the present application is simple to operate, can quickly detect, and saves time.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical transmission devices for automobiles, and in particular to a detection device for detecting the fillet angle of a coupling tooth of a transmission. Background Art

[0002] The transmission, a mechanism used to change the engine's speed and torque, is a crucial component of the vehicle. To enhance the smoothness and comfort of heavy-duty vehicles, synchronizers are commonly used. Locking pin synchronizers are widely used in heavy-duty transmissions due to their large capacity, high reliability, and long life. Synchronizers consist of a sliding sleeve, high and low-range synchro cones, and springs. The high and low-range gears are the mating components. The sliding sleeve and these gears contain engaging teeth with a filleted entry. After synchronization, the engaging teeth on the sliding sleeve advance through the filleted entry teeth on the range gear, completing the gear shift.

[0003] Due to the special structure and processing method of the product, it is difficult to ensure the consistency of the tooth fillet production. At present, it is difficult to detect the expansion angle of the fillet and the key parameters affecting the approach distance of the synchronizer. Some manufacturers use three-coordinate and profilometers for quantitative testing, but the detection process is complicated and it is difficult to use it as a means of quality inspection for mass-produced parts. Summary of the Invention

[0004] Based on this, it is necessary to provide a detection device that is easy to operate and used to detect the engagement tooth fillet angle of the transmission to address the problem of difficulty in detecting the engagement tooth fillet angle of the transmission.

[0005] According to one aspect of the present application, a detection device for detecting a tooth fillet angle of a transmission is provided, the detection device comprising:

[0006] A device body, wherein the device body is provided with an observation slot, and the observation slot penetrates the device body along the axial direction of the device body;

[0007] The observation groove can include two combined tooth fillets of the to-be-detected component, and the groove walls of the observation groove on two opposite sides in the circumferential direction of the device body form two comparison surfaces.

[0008] In one embodiment, the two comparison surfaces both pass through the axis of the device body.

[0009] In one embodiment, the opening angle of the observation slot should satisfy the following formula:

[0010]

[0011] in, is the opening angle of the observation slot, Z is the number of teeth of the combined teeth of the part to be detected, and Z1 is the number of teeth spans of the combined teeth of the part to be detected.

[0012] In one embodiment, the detection device further includes a measuring cone formed on the outside of the device body and extending along the circumference of the device body, and the measuring cone can fit with the fillet angle of the engaging tooth of the part to be detected.

[0013] In one embodiment, the expansion angle of the measuring cone is the same as the expansion angle of the combined tooth fillet of the component to be detected.

[0014] In one embodiment, the device body includes a first section body, a second section body and a third section body connected in sequence along the axial direction, the outer diameters of the first section body, the second section body and the third section body decrease in sequence and are coaxially arranged, and the detection device also includes a step end face, which is formed on the device body and is located on the side where the first section body is connected to the second section body and extends along the circumference of the first section body.

[0015] In one embodiment, the detection device further includes a radial positioning shaft diameter, which is formed on the outer circumferential surface of the third section body, and the radial positioning shaft diameter can cooperate with the circumferential surface where the minor diameter of the coupling tooth of the part to be detected is located.

[0016] In one embodiment, the detection device also includes a measuring cone, the detection device is provided with a first reference diameter, the intersection of the first reference diameter and the measuring cone is the first reference point, the part to be detected is provided with a second reference diameter, the first reference diameter and the second reference diameter are the same size, the intersection of the second reference diameter and the fillet edge line of the combined tooth of the part to be detected is the second reference point, the distance from the first reference point to the step end face is greater than the distance from the second reference point to the outer end face of the part to be detected close to the device body.

[0017] In one embodiment, the detection device further includes a measuring piece, and the measuring piece is used to measure the distance between the device body and the part to be detected.

[0018] In one embodiment, the detection device further includes an operating handle, which is connected to a side of the device body away from the object to be detected, and the axes of the operating handle and the device body coincide with each other.

[0019] The above-mentioned detection device includes a device body, which is provided with an observation groove. The observation groove forms two comparison surfaces on the groove walls on opposite sides of the circumference of the device body. The operator compares whether the two comparison surfaces pass through the two ridges of the two combined tooth fillets of the part to be detected located in the observation groove, so as to determine whether the combined tooth fillets of the part to be detected meet the requirements. If the two comparison surfaces pass through the ridges of the two combined tooth fillets respectively, the combined tooth fillets of the part to be detected meet the requirements, otherwise it does not meet the requirements; and by rotating the device body, the positional relationship between the two comparison surfaces and the ridges of the combined tooth fillets of the part to be detected can be adjusted, which is convenient for the operator's observation and is conducive to improving the detection efficiency. The detection device provided by the present application is simple to operate, can quickly detect, and save time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic front view of a detection device according to an embodiment of the present invention;

[0021] Figure 2 A schematic top view of a detection device according to an embodiment of the present invention;

[0022] Figure 3 For the present invention Figure 1 A local enlarged schematic diagram of location I in FIG;

[0023] Figure 4 This is a schematic diagram of the axial side of a component to be inspected in one embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of a main view of a component to be inspected in one embodiment of the present invention;

[0025] Figure 6 A schematic diagram of a main view of a detection device and a component to be detected during a detection process in one embodiment of the present invention;

[0026] Figure 7 For the present invention Figure 1 An enlarged schematic diagram of the first reference diameter and the first reference point of the detection device;

[0027] Figure 8 For the present invention Figure 5 An enlarged schematic diagram of the second reference diameter and the second reference point set in the part to be detected; Figure 9 A schematic top view of the detection device and the object to be detected during the detection process in one embodiment of the present invention;

[0028] Figure 10 Schematic diagram of a partial enlargement of the fillet of the engaging teeth of the component to be detected in one embodiment of the present invention.

[0029] Description of Figure Numbers:

[0030] 100. Detection device; 110. Device body; 111. Lightening hole; 112. First section of the body; 1121. First groove; 113. Second section of the body; 1131. Second groove; 114. Third section of the body; 1141. Third groove; 115. Observation groove; 1151. Comparison surface; 120. Measuring cone; 130. Radial positioning shaft diameter; 140. Operating handle; 141. Lightening groove; 150. Step end face; 200. Part to be detected; 210. First body; 220. Second body; 230. Third body. DETAILED DESCRIPTION

[0031] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations 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 should not be understood as limiting the present invention.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0034] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0035] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0036] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0037] See Figures 1 to 10 , Figure 1 FIG. 1 shows a schematic front view of a detection device according to an embodiment of the present invention. Figure 2 FIG. 1 shows a schematic top view of a detection device according to an embodiment of the present invention. Figure 3 The present invention is shown Figure 1 The local enlarged schematic diagram of point I in the figure is as follows: Figure 4 FIG1 shows a schematic diagram of the axial side of the part to be detected in one embodiment of the present invention. Figure 5 1 shows a schematic diagram of a main view of a part to be detected in one embodiment of the present invention. Figure 6 The figure shows a schematic diagram of the main view of the detection device and the object to be detected during the detection process in one embodiment of the present invention. Figure 7 The present invention is shown Figure 1 An enlarged schematic diagram of the first reference diameter and the first reference point of the detection device in FIG. Figure 8 The present invention is shown Figure 5 An enlarged schematic diagram of the second reference diameter and the second reference point of the part to be detected, Figure 9 FIG1 shows a schematic top view of a detection device and a component to be detected during a detection process according to an embodiment of the present invention. Figure 10 A partially enlarged schematic diagram of the fillet of the engaging teeth of the component to be detected in one embodiment of the present invention is shown.

[0038] In this application, the part to be tested 200 refers to the high and low gears of the transmission. Figure 4 and Figure 5 The test piece 200 is a rotating body structure, comprising a first body 210, a second body 220, and a third body 230 connected in sequence. The first body 210, the second body 220, and the third body 230 are coaxially arranged. The inner sides of the first and third body sections 210, 230 are provided with internal splines, and the outer sides of the second body 220 are provided with external splines. The external splines mesh with the gears on the intermediate shaft to transmit torque and power. The internal splines provided on the third body 230 are referred to as the coupling teeth of the test piece 200 in this application.

[0039] The present application provides a detection device 100 for detecting the tooth fillet angle of a transmission. The detection device 100 includes a device body 110. The device body 110 can be partially inserted into the part to be detected 200 and located in the inner spline hole opened by the third body 230. The device body 110 is provided with an observation groove 115. The observation groove 115 can contain two tooth fillets of the part to be detected 200. The observation groove 115 forms two comparison surfaces 1151 on the groove walls on opposite sides of the circumference of the device body 110. In this way, by rotating the device body 110 in the circumferential direction, the observation groove 115 can be rotated in the circumferential direction. When the observation groove 115 is rotated to contain two tooth fillets, the operator can judge whether the tooth fillet angle is qualified based on the positional relationship between the two comparison surfaces 1151 formed by the groove walls on opposite sides of the observation groove 115 and the ridges of the tooth fillets on both sides. The detection device 100 provided by the present application is simple to operate and effectively improves the detection efficiency.

[0040] Specifically, see Figure 1 and Figure 2The device body 110 is a body of revolution as a whole. The device body 110 is provided with a weight-reducing hole 111. The axis of the weight-reducing hole 111 coincides with the axis of the device body 110. Specifically, in some embodiments, the device body 110 includes a first body section 112, a second body section 113, and a third body section 114 connected in sequence along the axial direction. The first body section 112, the second body section 113, and the third body section 114 are all structures of a body of revolution as a whole. The outer diameters of the first body section 112, the second body section 113, and the third body section 114 decrease in sequence and are coaxially arranged. The first body section 112, the second body section 113, and the third body section 114 are respectively provided with a first groove 1121, a second groove 1131, and a third groove 1141. The axes of the first groove 1121, the second groove 1131, and the third groove 1141 coincide with each other, are interconnected, and jointly define the weight-reducing hole 111 provided in the device body 110. The second section body 113 and the third section body 114 can both extend into the inner spline hole formed in the third body 230 of the component to be detected 200 .

[0041] In this way, by providing the first section body 112, the second section body 113 and the third section body 114 with different outer diameters, the device body 110 can cooperate with the end where the coupling teeth of the part to be detected 200 are located, thereby avoiding the situation where the device body 110 cannot extend into the end where the coupling teeth of the part to be detected 200 are located due to unreasonable design of the outer diameter size, thereby preventing the size of the fillet of the coupling teeth of the part to be detected 200 from being detected.

[0042] Continue reading Figure 1 and Figure 2 In some embodiments, the device body 110 is further provided with an observation slot 115. The observation slot 115 penetrates the device body 110 along the axial direction of the device body 110, that is, the observation slot 115 is sequentially opened in the first section body 112, the second section body 113 and the third section body 114 in a direction parallel to the axis of the device body 110, and the observation slot 115 is connected to the weight-reducing hole 111. In a preferred embodiment, the planes of the groove walls on both sides of the observation slot 115 pass through the axis of the device body 110. In another preferred embodiment, the opening angle of the observation slot 115 should satisfy the following formula: in, is the opening angle of the observation slot 115 , Z is the number of teeth of the detection member 200 , and Z1 is the number of teeth across (ie, module).

[0043] Thus, the opening of the observation slot 115 can just accommodate two combined tooth fillets (the two combined tooth fillets do not refer to two complete combined tooth fillets, but to half a combined tooth fillet, a complete combined tooth fillet and a half combined tooth fillet arranged in sequence, which can be referred to in Figure 9By judging the relationship between the two intersection lines of the groove walls on the opposite sides of the observation groove 115 and the two ridge lines of the semi-combined tooth fillets on both sides of the observation groove 115 (the ridge lines can be referred to in Figure 10 ), it can be determined whether the fillet angle of the combined tooth of the detected part 200 meets the requirements. If the two intersection lines and the two edge lines coincide, it means that the fillet angle of the combined tooth of the detected part 200 fully meets the requirements. Otherwise, it means that the fillet angle of the combined tooth of the detected part 200 does not meet the requirements.

[0044] Continue reading Figures 3 to 5 In some embodiments, the detection device 100 further includes a measuring cone 120. The measuring cone 120 is annular in shape as a whole. The measuring cone 120 is formed on the outside of the device body 110 and extends along the circumference of the device body 110. The measuring cone 120 is located on the side where the second section body 113 is connected to the third section body 114. The measuring cone 120 can fit with the combined tooth fillet of the part to be detected 200. In other words, the second section body 113 can be used for axial positioning of the detection device 100. When the measuring cone 120 abuts against the combined tooth fillet of the part to be detected 200, the detection device 100 can no longer move in the direction of the part to be detected 200. In a preferred embodiment, the expansion angle A1 of the measuring cone 120 is the same as the expansion angle B1 of the combined tooth fillet of the part to be detected 200.

[0045] In this way, by setting the expansion angle A1 of the measuring cone 120 and the expansion angle B1 of the bonding angle of the part to be detected 200 to the same size, that is, the inclination angle of the measuring cone 120 and the end face inclination angle of the bonding tooth fillet of the part to be detected 200 are the same, the measuring cone 120 can be completely fitted on the bonding tooth fillet of the part to be detected 200, avoiding the operator's misjudgment due to the gap between the measuring cone 120 and the bonding tooth fillet of the part to be detected 200, thereby affecting the accuracy of the detection.

[0046] In some embodiments, the detection device 100 further includes a radial positioning diameter 130. Radial positioning diameter 130 is formed on the outer circumferential surface of the third section 114 of the device body 110. Radial positioning diameter 130 is capable of cooperating with the circumferential surface of the minor diameter of the engaging teeth of the detected part 200. In other words, the outer circumferential diameter of the third section 114 and the minor diameter of the engaging teeth of the detected part 200 are theoretically the same size, and the two can mate radially. Radial positioning diameter 130 is used to radially position the detection device 100 and the detected part 200.

[0047] In this way, when the detection device 100 is detecting whether the fillet angle of the engaging teeth of the part to be detected 200 meets the requirements, the third section body 114 can be extended into the internal spline hole opened in the third body 230 of the part to be detected 200. The radial positioning shaft diameter 130 can realize the radial positioning of the detection device 100 and the part to be detected 200, which is conducive to simplifying the detection process and improving the efficiency of detection.

[0048] It should be noted that the minor diameter of the coupling tooth of the part to be detected 200 refers to the minimum diameter of the coupling tooth of the part to be detected 200 along the circumferential direction (i.e., the tooth top circle diameter), and the fillet angle of the coupling tooth of the part to be detected 200 refers to the end face fillet angle of the coupling tooth of the part to be detected 200; the radial positioning shaft diameter 130 is located on the outer circumferential surface of the third section body 114, and the measuring cone 120 is located on the side of the second section body 113 facing the third section body 114. When the radial positioning shaft diameter 130 and the minor diameter of the coupling tooth of the part to be detected 200 are matched, the measuring cone 120 will gradually approach the fillet angle of the coupling tooth of the part to be detected 200. That is to say, during the detection process, the observation slot 115 can be first aligned with the two fillets of the coupling tooth of the part to be detected 200 as much as possible, and then the detection device 100 can be gradually extended into the part to be detected 200, and finally the observation slot 115 can be adjusted to a suitable detection position by rotating the detection device 100. In this way, the radial positioning operation and the alignment operation of the observation slot 115 can be completed simultaneously, which is beneficial to saving detection time and improving detection efficiency.

[0049] In some embodiments, the detection device 100 further includes an operating handle 140. The operating handle 140 is a rotating body structure, with one end of the operating handle 140 connected to the side of the device body 100 away from the object 200 to be detected. That is, the operating handle 140 is connected to the side of the first section body 112 away from the second section body 113, and the axes of the operating handle 140 and the device body 100 coincide. In a preferred embodiment, the operating handle 140 is provided with a weight-reducing groove 141, which is provided along the axial direction of the operating handle 140 and is coaxial with the operating handle 140.

[0050] In this way, the operator drives the entire detection device 100 to rotate by rotating the operating handle 140 in the circumferential direction, so that the two engaging tooth fillets of the observation groove 115 and the part to be detected 200 can be aligned. By moving the operating handle 140 in the axial direction, the radial positioning shaft diameter 130 and the surface where the minor diameter of the engaging tooth of the part to be detected 200 is located can be matched to complete the radial positioning operation. By pressing the operating handle 140, the measuring cone surface 120 and the engaging tooth fillet of the part to be detected 200 can also be closely fitted, which is conducive to observing whether the ridges of the engaging tooth fillet of the part to be detected 200 are aligned with the groove walls on the opposite sides of the observation groove 115.

[0051] In some embodiments, the detection device 100 further includes a stepped end surface 150. The stepped end surface 150 is generally annular, formed on the device body 110 and extending circumferentially along the first body section 112. The stepped end surface 150 is located on the side where the first body section 112 connects to the second body section 113. The stepped end surface 150 is spaced apart from the outer end surface of the third body 230 of the part to be detected 200, which is away from the second body 220. This prevents interference between the stepped end surface 150 and the part to be detected 200, which could affect detection efficiency and accuracy, during the detection process.

[0052] Continue reading Figure 6 According to another aspect of the present application, the detection device 100 provided in the present application can also be used to measure the approach distance of the transmission. The approach distance can be obtained by measuring and calculating the distance A0 between the step end face 150 and the outer end face of the part to be detected 200 on the side close to the device body 110.

[0053] It should be noted that the approach distance in actual production refers to the distance between the end faces of the coupling teeth of the high and low gear gears and the end faces of the internal splines of the sliding gear sleeve, which are relatively arranged; in this application, the approach distance of the transmission is not measured directly, but some dimensions related to the approach distance are measured indirectly, and then the approach distance is calculated through relevant mathematical models. In actual production, the approach distance is not convenient to measure directly, and is generally obtained through indirect measurement and calculation.

[0054] Continue reading Figure 7 and Figure 8 In some embodiments, the detection device 100 is provided with a first reference diameter D1 ( Figure 7 The first reference radius R1 is marked, that is, 2*R1=D1), and the intersection of the first reference diameter D1 and the measuring cone 120 is the first reference point d1 (as shown in the attached figure). Figure 7 The part to be tested 200 has a second reference diameter D2 ( Figure 8 The first reference radius R2 is marked, that is, 2*R2=D2), and the first reference diameter D1 and the second reference diameter D2 are the same in size. The intersection of the second reference diameter D2 and the fillet ridgeline of the detected part 200 is the second reference point d2 (as shown in the attached figure). Figure 8 ), the distance A2 from the first reference point d1 to the step end surface 150 is greater than the distance B2 from the second reference point d2 to the outer end surface of the to-be-detected member 200 close to the device body 10 .

[0055] It should be noted that the first reference diameter D1 and the second reference diameter D2 can be selected as needed, as long as they are the same size; in actual production, since the transmission includes many components, the distance A0 between the step end face 150 and the outer end face of the part to be detected 200 on the side close to the device body 110 is generally not convenient to measure directly. The distance A0 generally needs to be obtained indirectly through calculation, and the calculation principle is: A0 = A2-B2+tolerance.

[0056] Thus, when designing the detection device 100, the part to be detected 200 is already a finished product. By measuring the distance B2 from the second reference point d2 to the outer end surface of the part to be detected 200 on the side closest to the device body 10, and given the distance A0 and tolerance between the stepped end surface 150 and the outer end surface of the part to be detected 200 on the side closest to the device body 110, the distance A2 can be calculated using the above calculation formula, thereby designing a suitable detection device 100. This avoids interference between the stepped end surface 150 and the outer end surface of the part to be detected 200 on the side closest to the device body 110 when the detection device 100 is inserted into the part to be detected due to inappropriate design dimensions. At the same time, the distance A0 can also be obtained through this indirect measurement and calculation method.

[0057] In some embodiments, the detection device 100 further includes a measuring member (not shown) for measuring the distance between the device body 110 and the object to be detected 200. In a preferred embodiment, the measuring member is a feeler gauge or a go / no-go gauge. It is understood that the specific type of measuring member is not limited to this, and other measuring tools capable of measuring distances can be selected as needed to meet the requirements. Thus, the measuring member 100 can be used to measure the aforementioned distances A0, A2, and B2, among others.

[0058] In summary, the present application provides a detection device 100 that can be used to detect whether the tooth fillet angle of the part to be detected 200 meets the requirements, and can also be used to indirectly measure the approach distance of the transmission. The above-mentioned detection device 100, by rotating the device body 110 in the circumferential direction, can make the observation slot 115 contain two tooth fillets. At this time, the operator can judge whether the tooth fillet angle is qualified based on the positional relationship between the two comparison surfaces 1151 of the observation slot 115 and the ridges of the tooth fillets on both sides. The detection device 100 provided by the present application is simple to operate, can detect quickly, and effectively improves the detection efficiency; the opening angle of the observation slot 115 is calculated according to the formula, which can make it just contain the two tooth fillets of the part to be detected 200, thereby helping to reduce the error of the detection device 100 itself and improve the accuracy of the detection.

[0059] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0060] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A detection device for detecting the fillet angle of a transmission tooth, characterized in that: The detection device includes a device body, wherein the device body is provided with an observation slot, and the observation slot penetrates the device body along the axial direction of the device body; The observation slot can include two tooth fillets of the part to be inspected, and the groove walls of the observation slot on opposite sides of the circumference of the device body form two comparison surfaces; the two comparison surfaces both pass through the axis of the device body; The opening angle of the observation slot should satisfy the following formula: ； in, is the opening angle of the observation slot, is the number of teeth of the combined teeth of the part to be detected, is the number of teeth spanned by the combined teeth of the part to be detected; The detection device also includes a measuring cone, which is formed on the outside of the device body and extends along the circumference of the device body. The measuring cone can fit the fillet angle of the coupling tooth of the part to be detected; the expansion angle of the measuring cone is the same as the expansion angle of the fillet angle of the coupling tooth of the part to be detected.

2. The detection device according to claim 1, characterized in that The device body includes a first section body, a second section body and a third section body connected in sequence along the axial direction. The outer diameters of the first section body, the second section body and the third section body decrease in sequence and are coaxially arranged. The detection device also includes a step end face, which is formed on the side where the first section body is connected to the second section body and extends along the circumference of the first section body.

3. The detection device according to claim 2, characterized in that The detection device further comprises a radial positioning shaft diameter, which is formed on the outer circumferential surface of the third section body and can cooperate with the circumferential surface where the minor diameter of the coupling tooth of the to-be-detected part is located.

4. The detection device according to claim 2, characterized in that The detection device also includes a measuring cone surface, and the detection device is provided with a first reference diameter. The intersection of the first reference diameter and the measuring cone surface is the first reference point. The part to be detected is provided with a second reference diameter. The first reference diameter and the second reference diameter are the same in size. The intersection of the second reference diameter and the fillet ridge line of the combined tooth of the part to be detected is the second reference point. The distance from the first reference point to the step end face is greater than the distance from the second reference point to the outer end face of the part to be detected on the side close to the device body.

5. The detection device according to claim 1, characterized in that The detection device further comprises a measuring piece, which is used to measure the distance between the device body and the object to be detected.

6. The detection device according to claim 1, characterized in that The detection device further includes an operating handle connected to a side of the device body away from the object to be detected, and the axes of the operating handle and the device body coincide with each other.

Images