Tool and detection method for detecting the coaxiality between the center hole of a workpiece and the bevel gear

Abstract

The present invention discloses a tool and a detection method for detecting the coaxiality between the center hole and the bevel gear of a workpiece, belonging to the technical field of detection tooling, which mainly includes a rotating part and a fixed part that can rotate relatively, and a push rod that can move vertically relative to the rotating part, wherein the push rod and the rotating part clamp the workpiece and limit the movement of the workpiece relative to the rotating part in its axial direction, and the rotating part is equipped with a second bevel gear that matches the first bevel gear of the workpiece, that is, to limit the horizontal relative rotation between the rotating part and the workpiece, and enable the entire workpiece to rotate around the axis of the rotating part. The detection of the coaxiality between the center hole and the bevel gear of the workpiece can be converted into a more conveniently measured circular runout detection of the outer circumferential surface, so that the implementer can more conveniently and efficiently measure the coaxiality between the center hole of the workpiece and its bevel gear.

Description

Technical Field

[0001] The present invention relates to the technical field of detection tooling, and in particular to a tooling and a detection method for detecting the coaxiality between a workpiece center hole and a tapered gear. Background Art

[0002] In the field of railway vehicle technology, its brake adjuster guide nut and other components include a center hole arranged along its axis and a bevel gear coaxial with the center hole. During the processing, it is necessary to detect the coaxiality of the center hole and the bevel gear to avoid waste from flowing into the next process, thereby improving production efficiency. However, for the above-mentioned workpiece, there is no dedicated measuring tool, and the measurement operation is inconvenient to implement. Therefore, how to efficiently measure the coaxiality between the center hole and the bevel gear of this workpiece has become a technical problem that needs to be solved urgently. Summary of the invention

[0003] In summary, the technical problem solved by the present invention is to provide a tool for detecting the coaxiality between the center hole of a workpiece and the bevel gear, which can enable implementers to more conveniently and efficiently determine whether the coaxiality between the center hole of the workpiece and its bevel gear is within an acceptable range.

[0004] The solution adopted by the present invention to solve the above technical problems is:

[0005] A tool for detecting the coaxiality between a center hole and a bevel gear of a workpiece, wherein the workpiece includes a center hole arranged along its axis, and a first bevel gear coaxial with the center hole, the outer surface of the workpiece includes an outer circumferential surface coaxial with the center hole, and includes a fixed part and a rotating part, the bottom of the rotating part is connected to the fixed part, and it can rotate relative to the fixed part around its own vertical axis, the rotating part is formed with a second bevel gear adapted to the first bevel gear at its top, the second bevel gear and the rotating part are coaxial, and also includes a bottom end of the rotating part inserted into the rotating part A push rod, the push rod is coaxial with the rotating part, the push rod can slide vertically up and down relative to the rotating part, the outer periphery of the push rod is adapted to the inner periphery of the center hole, the top end of the push rod is connected with a flange coaxial with it, when the push rod is inserted into the center hole of the workpiece, the first bevel tooth and the second bevel tooth can be meshed together through the axial movement of the workpiece relative to the rotating part along the push rod, so as to make the two coaxial and limit the horizontal relative rotation between the two, and the flange clamps the workpiece with the second bevel tooth, thereby limiting the vertical movement of the workpiece relative to the rotating part.

[0006] Furthermore, a bearing is provided between the rotating part and the fixed part, and the rotating part is rotatably connected to the fixed part through the bearing.

[0007] Furthermore, the number of teeth of the first bevel gear and the second bevel gear are both 60.

[0008] Furthermore, the first bevel gear is an inner bevel gear, and the second bevel gear is an outer bevel gear.

[0009] Furthermore, a shaft shoulder abutting against the top of the bearing is formed on the outer periphery of the rotating part, and a stop portion abutting against the bottom of the bearing is formed on the fixed part, and the shaft shoulder and the stop portion limit the downward movement of the rotating part relative to the fixed part.

[0010] The above-mentioned tooling detection method comprises the following steps:

[0011] S1. Insert the push rod into the center hole of the workpiece, and then insert the push rod into the rotating part, and mesh the first bevel gear and the second bevel gear together, so that the first bevel gear and the second bevel gear are coaxial, and the horizontal relative rotation between the workpiece and the rotating part is limited;

[0012] S2. Adjust the depth of the push rod inserted into the rotating part so that the second bevel teeth and the flange clamp the workpiece, thereby limiting the axial movement of the workpiece relative to the rotating part;

[0013] S3. Make the rotating part rotate horizontally relative to the fixed part, and use a dial indicator to measure the outer circumferential surface of the workpiece.

[0014] Further, in step S3, downward pressure is applied to the flange.

[0015] In summary, due to the adoption of the above-mentioned technical scheme, the beneficial effect of the present invention is as follows: the present invention converts the detection of the coaxiality between the center hole of the workpiece and the bevel gear into the detection of the circular runout of the outer circumferential surface of the workpiece, so that the implementers can more conveniently and efficiently determine whether the coaxiality between the center hole of the workpiece and its bevel gear is within the qualified range. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings mentioned in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is a schematic diagram of the structure of Embodiment 1 provided by the present invention;

[0018] Figure 2 A schematic top view of Example 1 provided by the present invention;

[0019] Figure 3 This is a schematic diagram of the structure of Example 2 provided by the present invention.

[0020]

Specific symbol description

[0021] 1-workpiece, 2-fixed part, 3-rotating part, 4-second bevel gear, 5-thrust rod, 6-flange, 7-bearing, 8-shoulder, 9-stop part. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. 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.

[0024] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0025] In the description of the present invention, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the product of the invention is usually placed when in use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, if the terms "first", "second" and the like appear in the description of the present invention, they are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0026] In addition, if the terms "horizontal" or "vertical" appear in the description of the present invention, it does not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0027] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Example 1

[0029] like Figure 1 and Figure 2 As shown, the present embodiment 1 provides a tool for detecting the coaxiality between the center hole of a workpiece and the bevel gear, wherein the workpiece 1 includes a center hole arranged along its axis, and a first bevel gear coaxial with the center hole, the outer surface of the workpiece 1 includes an outer circumferential surface coaxial with the center hole, the tool includes a fixed part 2 and a rotating part 3, the bottom of the rotating part 3 is connected to the fixed part 2, and it can rotate relative to the fixed part 2 around its own vertical axis, the rotating part 3 is formed with a second bevel gear 4 adapted to the first bevel gear at its top, the second bevel gear 4 is coaxial with the rotating part 3, and also includes a bottom end thereof inserted into the rotating part The push rod 5 in the part 3 is coaxial with the rotating part 3, and the push rod 5 can slide vertically up and down relative to the rotating part 3. The outer periphery of the push rod 5 is adapted to the inner periphery of the center hole, and the top end of the push rod 5 is connected with a flange 6 coaxial therewith. When the push rod 5 penetrates into the center hole of the workpiece 1, the first bevel gear and the second bevel gear 4 can be meshed together through the axial movement of the workpiece 1 relative to the rotating part 3 along the push rod 5, so that the two are coaxial and limit the horizontal relative rotation between the two, while the flange 6 and the second bevel gear 4 clamp the workpiece 1, thereby limiting the vertical movement of the workpiece 1 relative to the rotating part 3.

[0030] The specific measurement method of the above-mentioned tooling includes the following steps:

[0031] S1, insert the push rod 5 into the center hole of the workpiece 1, and then insert the push rod 5 into the rotating part 3, and make the first bevel gear and the second bevel gear 4 mesh together, so that the first bevel gear and the second bevel gear 4 are coaxial, and the horizontal relative rotation between the workpiece 1 and the rotating part 3 is limited;

[0032] S2. Adjust the depth of the push rod 5 inserted into the rotating part 3 so that the second bevel gear 4 and the flange 6 clamp the workpiece 1, thereby limiting the axial movement of the workpiece 1 relative to the rotating part 3;

[0033] S3. The rotating part 3 is rotated horizontally relative to the fixed part 2, and the outer circumferential surface of the workpiece 1 is measured using a dial indicator.

[0034] Among them, since the bevel gear parameters such as the tooth top, module, and pitch cone angle of the first bevel gear and the second bevel gear 4 are consistent, and they are internal bevel gears and external bevel gears respectively, after the two are meshed, the first bevel gear and the second bevel gear 4 are relatively fixed in the circumferential direction, and the two are coaxial. The outer periphery of the push rod 5 is adapted to the inner periphery of the center hole, which specifically means that when the push rod 5 is inserted into the center hole of the workpiece 1, a radial spacing is left between the outer periphery of the push rod 5 and the inner periphery of the center hole. Therefore, after the first bevel gear and the second bevel gear 4 are meshed, the implementer only needs to horizontally rotate the entire rotating part 3 relative to the fixed part 2, and use a dial indicator to measure the circular runout of the outer circumferential surface on the surface of the workpiece 1 that is coaxial with the center hole, and the size of the coaxiality error between the first bevel gear and the center hole of the workpiece 1 can be known. As a preferred embodiment, in this embodiment 1, a bearing 7 is provided between the rotating part 3 and the fixed part 2, and the rotating part 3 is rotatably connected to the fixed part 2 through the bearing 7. Among them, the bearing 7 can effectively ensure the stability of the relative horizontal rotation between the rotating part 3 and the fixed part 2. In addition, more specifically, in this embodiment 1, the number of teeth of the first bevel gear and the second bevel gear 4 are both 60.

[0035] The flange 6 connected to the top of the push rod 5 is mainly used to form a clamping position with the second bevel gear 4. When the rotating part 3 rotates horizontally relative to the fixed part 2, it is preferable to apply downward pressure to the flange 6, so that the first bevel gear and the second bevel gear 4 can be closely meshed together to prevent the two from moving relative to each other in the vertical direction. Correspondingly, in the measuring method of the tool provided in this embodiment 1, in step S3, the following step is also included: applying downward pressure to the flange 6.

[0036] At the same time, in order to ensure that the fixed part 2 can support the entire rotating part 3 in the vertical direction, as a preferred embodiment, in this embodiment 1, the outer periphery of the rotating part 3 is formed with a shaft shoulder 8 that abuts against the top of the bearing 7, and the fixed part 2 is formed with a stop portion 9 that abuts against the bottom of the bearing 7, and the shaft shoulder 8 and the stop portion 9 limit the downward movement of the rotating part 3 relative to the fixed part 2. Among them, the pressure on the flange 6 is transmitted from the rotating part 3 to the fixed part 2 through the shaft shoulder 8, the bearing 7 and the stop portion 9 in sequence, effectively ensuring the stability of the first bevel gear and the second bevel gear 4 when they are engaged. More specifically, in this embodiment 1, the first bevel gear is an internal bevel gear, and the second bevel gear 4 is an external bevel gear.

[0037] Example 2

[0038] In the specific application process, in addition to the workpiece 1 having internal bevel teeth, some workpieces 1 are mainly composed of external bevel teeth, so Figure 3As shown, the specific embodiment 2 provided by the present invention. The main difference between embodiment 2 and embodiment 1 is the difference in the internal and external relationship between the first bevel gear and the second bevel gear 4. In embodiment 2, the first bevel gear is an external bevel gear, and the second bevel gear 4 is an internal bevel gear.

Claims

1. A tool for detecting the coaxiality between a center hole and a bevel gear of a workpiece, wherein the workpiece comprises a center hole arranged along its axis, and a first bevel gear coaxial with the center hole, and the outer surface of the workpiece comprises an outer circumferential surface coaxial with the center hole, characterized in that: The tooling includes a fixed part and a rotating part, the bottom of the rotating part is connected to the fixed part, and it can rotate relative to the fixed part around its own vertical axis, the rotating part is formed with a second bevel tooth matched with the first bevel tooth at its top, the second bevel tooth and the rotating part are coaxial, and also includes a push rod with its bottom end inserted into the rotating part, the push rod is coaxial with the rotating part, the push rod can slide up and down vertically relative to the rotating part, the outer periphery of the push rod is matched with the inner periphery of the center hole, the top end of the push rod is connected with a flange coaxial with it, when the push rod penetrates into the center hole of the workpiece, the first bevel tooth and the second bevel tooth can The workpiece is meshed together by the axial movement of the workpiece relative to the rotating part along the push rod, so that the two are coaxial and the horizontal relative rotation between the two is limited, and the flange and the second bevel tooth clamp the workpiece, thereby limiting the vertical movement of the workpiece relative to the rotating part; a bearing is provided between the rotating part and the fixed part, and the rotating part is rotatably connected to the fixed part through the bearing; a shoulder is formed on the outer periphery of the rotating part to abut against the top of the bearing, and the fixed part is formed with a stop portion abutting against the bottom of the bearing, and the shoulder and the stop portion limit the downward movement of the rotating part relative to the fixed part; the number of teeth of the first bevel tooth and the second bevel tooth are both 60.

2. A tool for detecting the coaxiality between a workpiece center hole and a bevel gear as claimed in claim 1, characterized in that: The first bevel gear is an inner bevel gear, and the second bevel gear is an outer bevel gear.

3. The tooling detection method according to any one of claims 1 to 2, characterized in that: The following steps are involved: S1. Insert the push rod into the center hole of the workpiece, and then insert the push rod into the rotating part, and mesh the first bevel gear and the second bevel gear together, so that the first bevel gear and the second bevel gear are coaxial, and the horizontal relative rotation between the workpiece and the rotating part is limited; S2. Adjust the depth of the push rod inserted into the rotating part so that the second bevel teeth and the flange clamp the workpiece, thereby limiting the axial movement of the workpiece relative to the rotating part; S3. Make the rotating part rotate horizontally relative to the fixed part, and use a dial indicator to measure the outer circumferential surface of the workpiece.

4. The tooling detection method according to claim 3, characterized in that: In step S3, downward pressure is applied to the flange.

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