Supporting mandrel used in gear detection process

Abstract

The invention provides a supporting mandrel used in a gear detection process, and belongs to the technical field of mechanical part detection, and the supporting mandrel specifically comprises a circular truncated cone shaft, a conical shell and a plurality of sliding blocks; installation shafts are arranged at the two ends of the circular truncated cone shaft, external threads are arranged on the circumferential side wall of the circular truncated cone shaft, the conical shell is arranged on the periphery of the external threads of the circular truncated cone shaft in a sleeving mode, and one end of the conical shell is rotationally connected with one end of each installation shaft. The conical shell is provided with a plurality of guide grooves evenly distributed in the circumferential direction of the axis of the circular truncated cone shaft, the extending direction of the guide grooves is parallel to the generatrix direction of the circular truncated cone shaft, the sliding blocks are arranged in the guide grooves in a sliding mode, the side faces, back to the circular truncated cone shaft, of the sliding blocks protrude out of the outer side wall of the conical shell, and internal threads in threaded connection with the external threads are arranged on the sliding blocks. The conical shell sliding block slides along the guide groove when rotating relative to the circular truncated cone shaft. Through the processing scheme of the invention, the supporting mandrel can be suitable for pairing and positioning of mechanical gears of various specifications, and has higher applicability in the detection process of the mechanical gears.

Description

Technical Field

[0001] This application relates to the field of mechanical part detection, and particularly to a support mandrel used in the gear detection process. Background Art

[0002] Gear transmission is a mechanical transmission method with extremely wide applications. Gears are also widely favored in the mechanical industry due to their high transmission efficiency and reliable transmission method. As an auxiliary tool for gear support and gear positioning, a mandrel is often used in the quality inspection link of gear parts, cooperating with the gear inspection center for rapid positioning to achieve the purpose of final quality assessment.

[0003] The applicant's research found that: currently, in the mechanical detection process of cylindrical gears, helical gears, and bevel gears for items such as gear runout, tooth profile, tooth direction, and pitch, it is mainly through selecting a corresponding tapered mandrel to cooperate with the gear for support, then placing the tapered mandrel on the upper and lower centers of the gear inspection center and pressing it tightly, and completing the detection of relevant gear content after aligning the gear with the help of the gear inspection center. In this process, one type of gear needs to cooperate with a specific tapered mandrel, which requires providing multiple specifications of mandrels as detection reserves during the production of different specifications of gear parts, increasing a large amount of detection costs and mandrel management costs, and the process of pairing the mandrel with the gear parts is also extremely time-consuming in production.

[0004] Although the existing designed expansion mandrel for the gear detection process has explored this problem to a certain extent, the problems are: although the expansion mandrel can solve the problem of mandrel pairing for multiple gears, due to the shortcoming of its structural design, the pairing range of the mandrel is still limited, and it does not have general applicability for gears with a large difference in specifications, and the compatibility is not high. At the same time, the existing expansion mandrel adopts a design method where three groups of "expansion strips" are pressed by springs and slide in the U-shaped groove on the mandrel surface, which makes the accuracy of this type of expansion mandrel relatively low. Therefore, designing a gear support mandrel with stronger applicability and higher accuracy is an inevitable development trend for cooperating with gear part detection. Summary of the Invention

[0005] In view of this, this application provides a support mandrel used in the gear detection process, which solves the problems in the prior art. The support mandrel can be applicable to the pairing and positioning of multiple specifications of mechanical gears, has higher applicability in the detection process of mechanical gears, and can be compatible with more specifications of mechanical gears.

[0006] The support mandrel used in the gear detection process provided by this application adopts the following technical solution:

[0007] A support mandrel used in the gear detection process includes a frustum shaft, a conical housing, and a plurality of sliders;

[0008] Both ends of the frustum shaft are provided with mounting shafts. An external thread is provided on the circumferential side wall of the frustum shaft. The conical housing is sleeved on the outer periphery of the external thread of the frustum shaft. One end of the conical housing is rotatably connected to one end of the mounting shaft;

[0009] The conical housing is provided with a plurality of guiding grooves evenly distributed circumferentially along the axis of the frustum shaft. The extending direction of the guiding grooves is parallel to the generatrix direction of the frustum shaft. The slider is slidably arranged in the guiding grooves. The side surface of the slider facing away from the frustum shaft protrudes from the outer side wall of the conical housing. And an internal thread is provided on the slider, which is threadedly connected to the external thread. Rotating the conical housing relative to the frustum shaft, the slider slides along the guiding grooves.

[0010] Optionally, a limiting sleeve is sleeved on the outer periphery of the mounting shaft at the small-diameter end of the frustum shaft. The limiting sleeve is detachably fixed on the mounting shaft. And the end surface of the limiting sleeve facing the large-diameter end of the frustum shaft abuts against the small-diameter end of the conical housing.

[0011] Optionally, a threaded hole is provided on the mounting shaft at the small-diameter end of the frustum shaft in the radial direction. A screw is provided on the limiting sleeve, which passes through the side wall of the limiting sleeve and is connected to the threaded hole.

[0012] Optionally, tapered holes are provided on the end surfaces of the mounting shafts at both ends of the frustum shaft away from the frustum shaft. The tapered holes are coaxially arranged with the frustum shaft. The tapered holes are used to cooperate with the upper and lower centers of the gear detection center equipment to fix the support mandrel before detection.

[0013] Optionally, guide rails are provided on the opposite side walls of the guiding grooves. Guide grooves corresponding to the guide rails are provided on the slider.

[0014] Optionally, three guiding grooves are provided on the conical housing, and one slider is provided in each guiding groove.

[0015] Optionally, a plurality of convex platforms are sequentially provided on the side surface of the slider facing away from the frustum shaft along the generatrix direction of the frustum shaft. The heights of the plurality of convex platforms protruding from the outer side wall of the conical housing in the direction perpendicular to the generatrix are different, and the protruding heights of the convex platforms gradually decrease from the large-diameter end to the small-diameter end of the frustum shaft.

[0016] In summary, the present application includes the following beneficial technical effects:

[0017] Rotate the conical housing relative to the frustum shaft. The rotation of the conical housing drives the relative movement of the internal thread of the slider and the external thread of the frustum shaft. That is, the slider rotates circumferentially around the frustum shaft along the external thread. Under the restriction of the guiding groove, the slider slides along the generatrix direction of the frustum shaft in the guiding groove. The sliders in multiple guiding grooves approach or move away from each other. When the sliders in multiple guiding grooves approach or move away from each other, the outer sides of the multiple sliders can abut against the inner side walls of gears with different inner diameters, realizing the supporting effect during the detection of gears with different specifications. The slider of the present application slides along the generatrix direction of the frustum shaft in the guiding groove, which can realize the linear change of the outer diameter of the supporting mandrel and improve the applicable range. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is a schematic diagram of the overall structure of the supporting mandrel of the present application;

[0020] Figure 2 It is an exploded structure schematic diagram of the supporting mandrel of the present application;

[0021] Figure 3 It is a schematic diagram of the structure of the guiding groove and the slider of the present application.

[0022] Description of the reference numerals: 1, frustum shaft; 11, mounting shaft; 2, conical housing; 21, guiding groove; 22, guide rail; 23, guide slot; 3, limiting sleeve; 4, screw; 41, threaded hole; 5, first slider; 6, second slider; 7, third slider; 8, conical hole. Detailed Embodiments

[0023] The embodiments of the present application will be described in detail below with reference to the drawings.

[0024] The following describes the implementation modes of the present application through specific specific examples. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation modes. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope protected by the present application.

[0025] It should be noted that the following describes various aspects of the embodiments within the scope of the appended claims. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is illustrative only. Based on the present application, those skilled in the art should understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects described herein can be used to implement the device and / or practice the method. Additionally, this device and / or this method can be implemented using other structures and / or functions in addition to one or more of the aspects described herein.

[0026] It should also be noted that the diagrams provided in the following embodiments only illustrate the basic concept of the present application in a schematic manner. The diagrams only show the components related to the present application and are not drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and proportion of each component in its actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0027] In addition, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the described aspects can be practiced without these specific details.

[0028] An embodiment of the present application provides a support mandrel for the gear detection process.

[0029] As Figures 1 to 3 shown, a support mandrel for the gear detection process includes a frustum shaft 1, a conical housing 2, and a plurality of sliders.

[0030] Both ends of the frustum shaft 1 are provided with mounting shafts 11. The circumferential side wall of the frustum shaft 1 is provided with external threads. The conical housing 2 is sleeved on the outer periphery of the external threads of the frustum shaft 1. One end of the conical housing 2 is rotatably connected to one end of the mounting shaft 11. The conical housing 2 is provided with a plurality of guide grooves 21 evenly distributed circumferentially along the axis of the frustum shaft 1. The extending direction of the guide grooves 21 is parallel to the generatrix direction of the frustum shaft 1. The slider is slidably arranged in the guide grooves 21. The side surface of the slider facing away from the frustum shaft 1 protrudes from the outer side wall of the conical housing 2. The side surface of the slider facing away from the frustum shaft 1 is used to abut against the inner wall of the measured gear, and the slider is provided with internal threads threadedly connected to the external threads. The sliders in the plurality of guide grooves 21 are circumferentially distributed along the axis of the frustum shaft 1. The outer side surfaces of the sliders have a common center point. The diameter of the circle where the outer side surfaces of the sliders are located is used as the outer diameter of the support mandrel.

[0031] Rotate the conical housing 2 relative to the frustum shaft 1. The rotation of the conical housing 2 drives the relative movement of the internal threads of the slider and the external threads of the frustum shaft 1. That is, the slider rotates circumferentially around the frustum shaft 1 along the external threads. Under the restriction of the guide grooves 21, the slider slides along the generatrix direction of the frustum shaft 1 in the guide grooves 21. The sliders in the plurality of guide grooves 21 approach or move away from each other. The outer sides of the plurality of sliders approaching or moving away from each other can abut against the inner side walls of gears with different inner diameters, realizing the supporting function during the detection of gears with different specifications. The slider of the present application slides along the generatrix direction of the frustum shaft 1 in the guide grooves 21, which can realize the linear change of the outer diameter of the support mandrel and improve the applicable range.

[0032] The support mandrel "changes its diameter" by means of screw thread engagement. The advantage of this kind of transmission design is that the screw thread transmission is more compact and stable, making the matching accuracy between the support mandrel and the mechanical gear higher. This can enable the mechanical gear to be quickly aligned during the detection process and can more effectively improve the detection efficiency of the mechanical gear.

[0033] Guide rails 22 are provided on the opposite side walls of the guide grooves 21. Guide grooves 23 corresponding to the guide rails 22 are provided on the slider. The guide grooves 21 penetrate through the large-diameter end of the conical housing, facilitating the installation of the slider into the guide grooves 21 from the large-diameter end of the conical housing. The small-diameter section of the conical housing is a continuous ring corresponding to the mounting shaft 11.

[0034] Three guide grooves 21 are provided on the conical housing 2. One slider is provided in each guide groove 21. The three sliders are the first slider 5, the second slider 6, and the third slider 7 respectively. The structures of the three sliders are the same.

[0035] A limit sleeve 3 is sleeved on the outer periphery of the mounting shaft 11 at the small-diameter end of the frustum shaft 1. The limit sleeve 3 is detachably fixed on the mounting shaft 11, and the end face of the limit sleeve 3 facing the large-diameter end of the frustum shaft 1 abuts against the small-diameter end of the conical housing 2. The arrangement of the limit sleeve 3 prevents the frustum shaft 1 and the conical housing 2 from separating from each other during use. A threaded hole 41 is provided on the mounting shaft 11 at the small-diameter end of the frustum shaft 1 in the radial direction. A screw 4 is provided on the limit sleeve 3 and passes through the side wall of the limit sleeve 3. After passing through the side wall of the limit sleeve 3, the screw 4 is connected to the threaded hole 41.

[0036] Tapered holes 8 are provided on the end faces of the mounting shafts 11 at both ends of the frustum shaft 1, which are away from the frustum shaft 1. The tapered holes 8 are coaxially arranged with the frustum shaft 1. The tapered holes 8 are used to cooperate with the upper and lower centers of the gear detection center device to fix the support mandrel before detection.

[0037] A plurality of convex platforms are sequentially provided on the side of the slider facing away from the frustum shaft 1 along the generatrix direction of the frustum shaft 1. The heights of the plurality of convex platforms protruding from the outer side wall of the conical housing 2 in the direction perpendicular to the generatrix are different, and the heights of the convex platforms protruding from the large-diameter end to the small-diameter end of the frustum shaft 1 decrease in sequence. A stepped surface is formed between adjacent convex platforms. The convex block on the side with the higher stepped surface can abut against the end face of the gear to be measured, which is used to position the axial position of the gear to be measured and ensure that the axis of the gear to be measured can coincide with the axis of the frustum shaft 1.

[0038] As described above, the above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A support mandrel used in the gear detection process, characterized in that, It includes a frustum-shaped shaft (1), a conical housing (2) and a plurality of sliders; Both ends of the frustum-shaped shaft (1) are provided with mounting shafts (11). The circumferential side wall of the frustum-shaped shaft (1) is provided with an external thread. The conical housing (2) is sleeved on the outer periphery of the external thread of the frustum-shaped shaft (1). One end of the conical housing (2) is rotatably connected to one end of the mounting shaft (11); The conical housing (2) is provided with a plurality of guide grooves (21) evenly distributed circumferentially along the axis of the frustum-shaped shaft (1). The extending direction of the guide grooves (21) is parallel to the generatrix direction of the frustum-shaped shaft (1). The sliders are slidably arranged in the guide grooves (21). The side surface of the slider facing away from the frustum-shaped shaft (1) protrudes from the outer side wall of the conical housing (2), and the slider is provided with an internal thread that is threadedly connected to the external thread. Rotating the conical housing (2) relative to the frustum-shaped shaft (1), the slider slides along the guide groove (21).

2. The support mandrel for the gear detection process according to claim 1, characterized in that, A limit sleeve (3) is sleeved on the outer periphery of the mounting shaft (11) at the small-diameter end of the frustum-shaped shaft (1). The limit sleeve (3) is detachably fixed on the mounting shaft (11), and the end surface of the limit sleeve (3) facing the large-diameter end of the frustum-shaped shaft (1) abuts against the small-diameter end of the conical housing (2).

3. The support mandrel for gear detection according to claim 2, wherein, A threaded hole (41) in the radial direction is provided on the mounting shaft (11) at the small-diameter end of the frustum-shaped shaft (1). A screw (4) is provided on the limit sleeve (3) and passes through the side wall of the limit sleeve (3). After passing through the side wall of the limit sleeve (3), the screw (4) is connected to the threaded hole (41).

4. The support mandrel for the gear detection process according to claim 1, characterized in that Conical holes (8) are provided on the end surfaces of the mounting shafts (11) at both ends of the frustum-shaped shaft (1) away from the frustum-shaped shaft (1). The conical holes (8) are coaxially arranged with the frustum-shaped shaft (1). The conical holes (8) are used to cooperate with the upper and lower centers of the gear detection center equipment to fix the support mandrel before detection.

5. The support mandrel for the gear detection process according to claim 1, characterized in that Guide rails (22) are provided on the opposite side walls of the guide grooves (21). Guide grooves (23) corresponding to the guide rails (22) are provided on the sliders.

6. The support mandrel for the gear detection process according to claim 1, characterized in that, Three of the guide grooves (21) are provided on the conical housing (2), and one of the sliders is provided in each guide groove (21).

7. The support mandrel for the gear detection process according to claim 1, characterized in that, A plurality of convex platforms are sequentially arranged on the side surface of the slider facing away from the frustum-shaped shaft (1) along the generatrix direction of the frustum-shaped shaft (1). The heights of the plurality of convex platforms protruding from the outer side wall of the conical housing (2) in the direction perpendicular to the generatrix are different, and the protruding heights of the convex platforms gradually decrease from the large-diameter end to the small-diameter end of the frustum-shaped shaft (1).

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