Belt pulley positioning device and dynamic balance rapid detection device using same

Abstract

The utility model relates to a belt pulley positioning device and a dynamic balance rapid detection device using the same. The belt pulley positioning device comprises a taper mandrel and a pull rod subassembly. The pull rod sub-assembly comprises a taper elastic sleeve, a pull rod and a pushing assembly arranged at the top end of the pull rod, the taper elastic sleeve is correspondingly provided with an inner hole, the outer wall of the taper mandrel abuts against the hole wall of the inner hole of the taper elastic sleeve, and the taper elastic sleeve comprises an abutting block; the outer side wall of the abutting block abuts against the hole wall of an inner hole of the belt pulley to be detected, the pull rod is connected with an inner hole of the taper elastic sleeve and an inner hole of the taper mandrel in an inserted mode, and the pushing assembly abuts against the top face of the taper elastic sleeve. The taper mandrel comprises a taper part, and the outer diameter of the taper part is gradually increased in the direction away from the pushing assembly. The possibility that a gap exists between the taper elastic sleeve and the inner hole of the to-be-detected belt pulley is reduced, and parameters such as the dynamic balance amount of the belt pulley can be truly and effectively detected.

Description

Technical Field

[0001] This utility model relates to the technical field of detection devices, and in particular to a pulley positioning device and a dynamic balance rapid detection device using the positioning device. Background Technology

[0002] As the power transmission component of a harvester's gearbox, the dynamic balance of the pulley is crucial during rotation. If the pulley's dynamic balance is out of specification, it will cause significant vibration and noise in the harvester; if the pulley is unbalanced, it will easily slip during rotation, failing to transmit power, thus affecting the harvester's production efficiency and service life. Therefore, the dynamic balance of the pulley is a key parameter, and a reliable and effective method for verifying its dynamic balance is urgently needed. Utility Model Content

[0003] In order to verify the dynamic balance parameters of pulleys in a real and effective manner, this application provides a pulley positioning device and a dynamic balance rapid detection device using the positioning device.

[0004] In a first aspect, this application provides a pulley positioning device, including a tapered mandrel for connecting to a connecting structure corresponding to a pulley to be tested, and a pull rod sub-assembly for positioning the pulley to be tested onto the tapered mandrel;

[0005] The pull rod assembly includes a tapered elastic sleeve, a pull rod, and a pushing component disposed at the top of the pull rod. The tapered elastic sleeve has an inner hole, and the outer wall of the tapered spindle abuts against the inner hole wall of the tapered elastic sleeve. The tapered elastic sleeve includes an abutting block, and the outer wall of the abutting block abuts against the inner hole wall of the pulley to be tested. The pull rod is inserted into the inner hole of the tapered elastic sleeve and the inner hole of the tapered spindle. The pushing component abuts against the top surface of the tapered elastic sleeve.

[0006] The tapered mandrel includes a tapered portion, the outer diameter of which gradually increases in the direction away from the pushing component. By rotating the pull rod, the pull rod moves along its axial direction, and the pushing component pushes the tapered elastic sleeve to move along the tapered mandrel, so that the tapered portion drives the tapered elastic sleeve to expand.

[0007] The beneficial effects of this invention are as follows: When the pull rod is rotated, it can push the tapered elastic sleeve downward along the tapered mandrel via the pushing component. After the tapered elastic sleeve moves downward to a height greater than the height of the truncated cone corresponding to the tapered portion, the pull rod continues to rotate. Due to the tapered mandrel's taper, the tapered elastic sleeve expands, causing it to abut against the inner wall of the pulley to be tested. This reduces the possibility of a gap between the tapered elastic sleeve and the inner hole of the pulley, facilitating a gapless fit between the tapered elastic sleeve and the inner hole of the pulley, and enabling accurate and effective testing of parameters such as the dynamic balance of the pulley.

[0008] Furthermore, the inner hole of the tapered elastic sleeve includes a first portion, the hole wall of the first portion is tapered, and the hole diameter of the first portion gradually increases in the direction away from the pushing component.

[0009] The beneficial effects of adopting the above-mentioned further solution are: when the tapered elastic sleeve moves and expands along the tapered mandrel, due to the tapered design of the first part of the hole wall, the tapered elastic sleeve can expand evenly, thereby improving the fitting accuracy between the tapered elastic sleeve and the inner hole of the pulley to be tested, helping to reduce the gap between the tapered elastic sleeve and the inner hole of the pulley to be tested, and improving the stability of the positioning device.

[0010] Furthermore, the taper corresponding to the first part is the same as the taper corresponding to the taper part.

[0011] The beneficial effect of adopting the above-mentioned further solution is that when the tapered elastic sleeve moves and expands on the tapered mandrel, due to the consistency of the taper, it is easy to slide smoothly along the tapered mandrel, reducing the shaking or jamming caused by the difference in taper, thereby enhancing the stability of the positioning device in the detection process.

[0012] Furthermore, the maximum aperture corresponding to the first part is equal to the maximum outer diameter of the tapered portion of the tapered mandrel, and the truncated cone height corresponding to the first part is equal to the truncated cone height corresponding to the tapered portion of the tapered mandrel.

[0013] The advantages of adopting the above-mentioned further solution are as follows: Since the maximum aperture is equal to the maximum outer diameter, the gap between the tapered elastic sleeve and the tapered mandrel is minimized when they mate, improving the accuracy and stability of the inspection. Because the truncated cone height is equal, the expansion process of the tapered elastic sleeve along the tapered mandrel is more uniform. Due to the gapless fit and uniform expansion between the tapered elastic sleeve and the tapered mandrel, the positioning device can more accurately position the pulley to be inspected and ensure its stability during the inspection process.

[0014] Furthermore, the inner hole of the tapered elastic sleeve also includes a second part and a third part, the first part, the second part and the third part are interconnected, the third part is located at the top wall of the tapered elastic sleeve, the pull rod passes through the third part, and the diameter of the third part is smaller than the diameter of the second part;

[0015] The pull rod is fixedly connected to a second limiting plate, which is located at the second part and has a diameter larger than the hole diameter of the third part. The upper surface of the second limiting plate abuts against the top wall of the inner hole of the tapered elastic sleeve.

[0016] The beneficial effect of adopting the above-mentioned further solution is that it improves the stability of the tapered elastic sleeve following the movement of the pull rod.

[0017] Furthermore, the tapered mandrel may include an integrally formed transverse portion and a vertical portion. The outer wall of the vertical portion abuts against the inner hole wall of the tapered elastic sleeve. A transition plate is provided between the tapered mandrel and the connecting structure. The transition plate is fixedly connected to the connecting structure, and the transverse portion is fixedly connected to the transition plate.

[0018] The beneficial effects of adopting the above-mentioned further solution are as follows: Through the integrally formed transverse and vertical sections, the overall structure of the tapered mandrel is more stable, capable of withstanding greater loads and torques, thus improving the stability and reliability of the positioning device. The fixed connection between the transition plate and the connecting structure, as well as the fixed connection between the transverse section and the transition plate, makes the installation and disassembly of the tapered mandrel simpler and faster, improving work efficiency during maintenance and component replacement.

[0019] Furthermore, the tapered elastic sleeve also includes a sleeve body, and the abutting block is integrally formed with the outer wall of the sleeve body. The abutting block is a ring-shaped structure that protrudes laterally from the sleeve body, and the bottom surface of the abutting block is higher than the bottom surface of the sleeve body.

[0020] The beneficial effects of adopting the above-mentioned further solution are as follows: Since the bottom surface of the abutment block is higher than the bottom surface of the sleeve body, the sleeve body forms a thin-walled structure under the abutment block, thereby reducing the overall weight of the tapered elastic sleeve and improving the elasticity of the sleeve body. When the tapered elastic sleeve moves and expands along the tapered mandrel, the thin-walled sleeve body is more easily deformed, thus better adapting to the shape of the inner hole of the pulley and achieving a tighter fit.

[0021] Furthermore, the pushing component includes a rotating cap and a fixing pin. The rotating cap includes a cap body and a first limiting plate integrally formed with the bottom of the cap body. The top of the pull rod is inserted into the cap body. The fixing pin passes through the cap body and the pull rod. The bottom surface of the first limiting plate away from the cap body abuts against the top surface of the tapered elastic sleeve away from the lateral portion.

[0022] The advantages of adopting the above-mentioned further solution are: the rotating cap design allows users to easily rotate the pull rod, thereby controlling the expansion degree of the tapered elastic sleeve and improving operational convenience. The fixing pin passing through the cap body and the pull rod improves the stability of the connection between the pull rod and the rotating cap.

[0023] Furthermore, the transverse portion is provided with a plurality of fourth threaded holes, and through each of the fourth threaded holes, the transverse portion is threadedly connected to an adjustable support pin for supporting the pulley to be tested; the adjustable support pin includes a pin top and a pin body, the pin body is connected to the fourth threaded hole, the upper surface of the pin top abuts against the lower surface of the pulley to be tested, and the pin top is provided with an adjustment hole for rotating the adjustable support pin.

[0024] The beneficial effects of adopting the above-mentioned further solution are: by supporting the pulley to be tested with the adjustable support pin, the stability of the pulley's positioning and testing is increased. The addition of an adjustment hole improves the convenience of rotating and adjusting the height of the adjustable support pin.

[0025] Secondly, this application provides a dynamic balancing rapid detection device using the pulley positioning device described in the first aspect, wherein the pulley positioning device and the dynamic balancing detection device are used to position the pulley to be tested onto the dynamic balancing detection device, and the dynamic balancing detection device is used to perform dynamic balancing detection on the pulley to be tested.

[0026] The beneficial effects of adopting the above-mentioned further solution are: by using the pulley positioning device, a quick and gapless fit with the inner hole of the pulley to be tested can be achieved, which facilitates the accurate, efficient and convenient inspection of the dynamic balance parameters of the pulley. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of a pulley to be tested according to an embodiment of this application;

[0028] Figure 2 This is a cross-sectional view of the pulley to be tested in an embodiment of this application;

[0029] Figure 3 This is a cross-sectional view of the pulley positioning device according to an embodiment of this application;

[0030] Figure 4 A cross-sectional view illustrating the tapered mandrel structure of an embodiment of this application;

[0031] Figure 5 This is a schematic diagram of another pulley to be tested according to an embodiment of this application;

[0032] Figure 6 This is a schematic diagram illustrating the tapered elastic sleeve structure of an embodiment of this application;

[0033] Figure 7 This is a top view of the tapered elastic sleeve according to an embodiment of this application;

[0034] Figure 8 for Figure 7 Sectional view of AA;

[0035] Figure 9 A cross-sectional view of a tapered elastic sleeve without a stepped structure;

[0036] Figure 10 A cross-sectional view illustrating the rotating cap structure of an embodiment of this application;

[0037] Figure 11 This is a schematic diagram illustrating the tie rod structure of an embodiment of this application;

[0038] Figure 12 A cross-sectional view illustrating the transition plate structure of an embodiment of this application;

[0039] Figure 13 This is a top view of the transition plate in an embodiment of this application;

[0040] Figure 14 This is a top view of the tapered mandrel according to an embodiment of this application.

[0041] The attached diagram lists the components represented by each number as follows:

[0042] 1. Pulley to be tested; 2. Tapered mandrel; 21. Lateral part; 211. Third bolt hole; 212. Fourth threaded hole; 22. Vertical part; 23. Adjustable support pin; 231. Adjustment hole; 3. Transition plate; 31. First bolt hole; 32. Second bolt hole; 33. First fixing bolt; 34. Second fixing bolt; 4. Tapered elastic sleeve; 41. Sleeve body; 42. Abutment block; 43. First part; 44. Second part; 45. Third part; 5. Pull rod; 51. Second limiting plate; 52. Third limiting plate; 6. Rotating cap; 61. Cap body; 62. First limiting plate; 7. Fixing pin; 8. Nut. Detailed Implementation

[0043] The present application will be further described in detail below with reference to the accompanying drawings.

[0044] This application discloses a pulley positioning device, which is used to position a pulley as follows: Figure 1 and Figure 2 The pulley 1 to be tested, as shown, is positioned on the connecting structure such as the dynamic balancing testing device. For example... Figure 3 As shown, the pulley positioning device includes a tapered mandrel 2 and a pull rod sub-assembly. The tapered mandrel 2 is connected to the connecting structure, and the pull rod sub-assembly is used to position the pulley 1 to be tested onto the tapered mandrel 2.

[0045] like Figure 3 and Figure 4 As shown, the tapered mandrel 2 may include an integrally formed transverse portion 21 and a vertical portion 22. A transition plate 3 may be provided between the tapered mandrel 2 and the connecting structure. The tapered mandrel 2 can be directly fixedly connected to the connecting structure, or the transition plate 3 can be fixedly connected to the connecting structure, with the transverse portion 21 fixedly connected to the transition plate 3. The vertical portion 22 is a hollow structure, forming an inner hole extending along the vertical portion 22 in the tapered mandrel 2. In this embodiment, Figure 3 It can be obtained by cutting with a section line, the angle of which can be 135 degrees or 225 degrees.

[0046] like Figure 3 As shown, the pulley 1 to be tested includes an inner hole, and the pull rod sub-assembly includes a tapered elastic sleeve 4 and a pull rod 5. The tapered elastic sleeve 4 has a hollow structure, which forms the inner hole of the tapered elastic sleeve 4. The tapered elastic sleeve 4 is sleeved on the outside of the tapered spindle 2, so that the outer wall of the tapered spindle 2 abuts against the inner hole wall of the tapered elastic sleeve 4. The inner hole of the tapered elastic sleeve 4 and the inner hole of the tapered spindle 2 are coaxially arranged. The pull rod 5 is inserted into the inner hole of the tapered elastic sleeve 4 and the inner hole of the tapered spindle 2, so that the pull rod 5 can rotate along the inner hole of the tapered elastic sleeve 4 and the inner hole of the tapered spindle 2. It is easy to understand that the tapered elastic sleeve 4 is a tapered sleeve made of elastic material.

[0047] In this embodiment, the bottom of the pull rod 5 along its length can be threaded to the bottom wall of the inner hole of the tapered mandrel 2, or it can be threaded to the transition plate 3. For example, the center of the transition plate 3 can be provided with an internally threaded hole extending in the vertical direction, and the bottom of the pull rod 5 along its length can be threaded to the transition plate 3 through the internally threaded hole of the transition plate 3.

[0048] By rotating the pull rod 5, the pull rod 5 can move up and down along its axis. The pull rod sub-assembly also includes a push assembly disposed at the top of the pull rod 5. The push assembly abuts against the top surface of the tapered elastic sleeve 4 away from the transverse portion 21, so that the tapered elastic sleeve 4 moves downward synchronously with the pull rod 5.

[0049] like Figure 4 and Figure 5 As shown, in an optional embodiment, the transverse portion 21 is further provided with a plurality of fourth threaded holes 212. An adjustable support pin 23 can be threadedly connected to the transverse portion 21 through each fourth threaded hole 212. The adjustable support pin 23 includes a pin top and a pin body. The outer wall of the pin body is provided with external threads, which can contact the fourth threaded holes 212. The upper surface of the pin top can abut against the lower surface of the pulley 1 to be tested, thereby supporting the pulley 1 and increasing the stability of the positioning and testing of the pulley 1.

[0050] To accommodate pulleys 1 at different heights, the height of the adjustable support pin 23 extending from the lateral portion 21 can be adjusted. For example, when the adjustable support pin 23 is rotated clockwise, the contact area between the pin body and the fourth threaded hole 212 gradually increases, and the height of the adjustable support pin 23 gradually decreases. When the adjustable support pin 23 is rotated counterclockwise, the contact area between the pin body and the fourth threaded hole 212 gradually decreases, and the height of the adjustable support pin 23 gradually increases.

[0051] In this embodiment, an adjustment hole 231 is provided at the top of the nail, and a slender shaft is inserted into the adjustment hole 231. After the pulley 1 to be tested is placed, it is inconvenient to rotate the adjustable support nail 23 by hand into the pulley positioning device. At this time, the slender shaft can be used to rotate the adjustable support nail 23 synchronously by rotating the slender shaft, which replaces the hand rotation of the adjustable support nail 23 and improves the convenience of rotating and adjusting the height of the adjustable support nail 23.

[0052] like Figures 6-8 As shown, the tapered elastic sleeve 4 includes a sleeve body 41 and an abutment block 42. The outer wall of the abutment block 42 abuts against the inner hole wall of the pulley 1 to be tested. The abutment block 42 is integrally formed with the outer wall of the sleeve body 41. The inner hole of the tapered elastic sleeve 4 is opened in the sleeve body 41. The inner hole of the tapered elastic sleeve 4 includes a first part 43, a second part 44 and a third part 45 that are interconnected. The hole wall of the first part 43 is tapered, and the hole diameter of the first part 43 gradually increases along the direction close to the transverse part 21.

[0053] like Figure 3 and Figure 4 As shown, the height of the vertical portion 22 is not less than the height of the tapered elastic sleeve 4. The vertical portion 22 includes a tapered portion, and the outer diameter of the tapered portion gradually increases in the direction away from the push assembly.

[0054] In this embodiment, the tapered portion can be the entire area of ​​the vertical portion 22, that is, the outer wall of the vertical portion 22 can be set in a tapered manner as a whole, and the outer diameter of the vertical portion 22 gradually increases in the direction close to the transverse portion 21. Alternatively, it can be a part of the vertical portion 22, that is, the outer wall of the vertical portion 22 can be set in a tapered manner. The outer diameter of the upper part of the vertical portion 22 that is used to cooperate with the tapered elastic sleeve 4 gradually increases in the direction close to the transverse portion 21. The remaining lower part of the vertical portion 22 can be cylindrical or other shapes.

[0055] like Figure 4 and Figure 8As shown, the taper of the first part 43 and the taper of the vertical part 22 can be the same. For example, the ratio of the inner hole of the tapered elastic sleeve 4 to the taper of the vertical part 22 is 1:5. In this embodiment, the tapered shape formed by the first part 43 and the vertical part 22 can be a frustum shape. The taper ratio refers to the ratio between the diameter difference of the upper and lower base circles of the frustum and the height of the frustum.

[0056] like Figure 3 As shown, in this embodiment, the diameter of the lower base circle corresponding to the first part 43 can be the same as the diameter of the lower base circle corresponding to the tapered part of the tapered mandrel 2. That is, the maximum hole diameter of the first part 43 is equal to the maximum outer diameter in the tapered part of the tapered mandrel 2, and the height of the frustum corresponding to the first part 43 is equal to the height of the frustum corresponding to the tapered part of the tapered mandrel 2.

[0057] Taking the threaded connection between the bottom of the pull rod 5 and the transition plate 3 along its length as an example, when the pull rod 5 is rotated forward, it can be screwed into the internal threaded hole of the transition plate 3. This pushes the tapered elastic sleeve 4 downward along the vertical portion 22 towards the transverse portion 21 via the pushing component. After the tapered elastic sleeve 4 moves downward to a height greater than the height of the truncated cone corresponding to the vertical portion 22, the pull rod 5 is rotated forward again. Because the tapered spindle 2 has a taper, the tapered elastic sleeve 4 expands, causing the abutment block 42 to abut against the inner wall of the pulley 1 to be tested. This reduces the possibility of a gap between the abutment block 42 and the inner hole of the pulley 1 to be tested, making it easier to achieve a gapless fit between the abutment block 42 and the inner hole of the pulley 1 to be tested.

[0058] like Figure 4 and Figure 8 As shown, as an optional implementation of this embodiment, the abutment block 42 can be a ring-shaped structure that protrudes laterally from the sleeve body 41. The bottom surface of the abutment block 42 is higher than the bottom surface of the sleeve body 41, which reduces the overall weight of the tapered elastic sleeve 4 and makes the sleeve body 41 below the abutment block 42 thin-walled, thereby improving the elasticity of the sleeve body 41.

[0059] like Figure 5 and Figure 9 As shown, as another optional implementation of this embodiment, the abutment block 42 can be a structure with the same height as the sleeve body 41, so that no step structure is formed between the abutment block 42 and the sleeve body 41, which can be suitable for the positioning and detection of various types of pulleys 1 to be tested, and has stronger versatility.

[0060] like Figure 3 and Figure 10 As shown, in an optional implementation of this embodiment, the pushing component may include a rotating cap 6 and a fixing pin 7. The rotating cap 6 includes a cap body 61 and a first limiting plate 62 integrally formed with the bottom of the cap body 61. Figure 3 , Figure 4, Figure 10 , Figure 11 and Figure 12 As shown, the top of the pull rod 5 is inserted into the cap body 61. Both the cap body 61 and the pull rod 5 have pin holes. The fixing pin 7 passes through the pin holes on the cap body 61 and the pull rod 5, which facilitates fixing the rotating cap 6 to the pull rod 5. The bottom surface of the first limiting plate 62 away from the cap body 61 abuts against the top surface of the tapered elastic sleeve 4 away from the transverse part 21. Thus, the pull rod 5 can be rotated by rotating the rotating cap 6, which improves the ease of operation of rotating the pull rod 5.

[0061] like Figure 5 As shown, as another optional embodiment of this example, the pushing component may include a nut 8 and a third limiting plate 52. The nut 8 may be a standard hexagonal nut. The top of the pull rod 5 is fixedly connected to the nut 8, and the third limiting plate 52 is also fixedly connected to the pull rod 5. The third limiting plate 52 is located below the nut 8, and the lower surface of the third limiting plate 52 away from the nut 8 can abut against the top surface of the tapered elastic sleeve 4. Thus, the pull rod 5 can be rotated by rotating the nut 8, which improves the ease of operation of rotating the pull rod 5. The pushing component has a simple structure, which improves the ease of manufacturing and manufacturing efficiency.

[0062] like Figure 3 , Figure 5 , Figure 8 , Figure 9 and Figure 11 As shown, in this embodiment, the third part 45 is located at the top wall of the tapered elastic sleeve 4, and the pull rod 5 passes through the third part 45. The diameter of the hole in the third part 45 is smaller than the diameter of the hole in the second part 44.

[0063] like Figure 3 , Figure 8 and Figure 11 As shown, in an optional embodiment, a second limiting plate 51 can be fixedly connected to the side wall of the pull rod 5. The second limiting plate 51 is located at the second part 44, and the diameter of the second limiting plate 51 is larger than the hole diameter of the third part 45. The upper surface of the second limiting plate 51 abuts against the top wall of the inner hole of the tapered elastic sleeve 4, thereby improving the stability of the tapered elastic sleeve 4 following the movement of the pull rod 5. When the pull rod 5 is rotated in the opposite direction, the pull rod 5 can be screwed out into the internal thread hole of the transition plate 3. The second limiting plate 51 can push the tapered elastic sleeve 4 to move upward along the vertical part 22 away from the horizontal part 21, improving the convenience of releasing the positioning of the pulley 1 to be tested.

[0064] like Figure 3 , Figure 5 , Figure 12 and Figure 13As shown in this embodiment, the transition plate 3 is provided with a plurality of first bolt holes 31 and a plurality of second bolt holes 32. Each first bolt hole 31 corresponds to a first fixing bolt 33. The transition plate 3 and the connecting structure can be detachably fixedly connected by a plurality of first fixing bolts 33. For example, the first fixing bolt 33 can be an M12X100 hex bolt.

[0065] Each second bolt hole 32 corresponds to a second fixing bolt 34. The transverse portion 21 has multiple third bolt holes 211 that correspond to the second bolt holes 32 respectively. The transition plate 3 and the transverse portion 21 can be connected by multiple second fixing bolts 34. The second fixing bolts 34 pass through the second bolt holes 32 corresponding to the third bolt holes 211 in sequence, so that the transition plate 3 and the transverse portion 21 can be detachably fixed. For example, the second fixing bolts 34 can be M10X35 hex bolts.

[0066] like Figure 3 , Figure 5 and Figure 14 As shown, in this embodiment, the third bolt holes 211 are evenly distributed along the transverse portion 21, and the first bolt holes 31 and the second bolt holes 32 are evenly distributed along the transition plate 3. For example, there are four first bolt holes 31 and four second bolt holes 32, thus there are also four third bolt holes 211. The angle between two adjacent first bolt holes 31 is 90 degrees, and the angle between two adjacent second bolt holes 32 and two adjacent third bolt holes 211 is also 90 degrees.

[0067] The specific implementation process of this embodiment is as follows:

[0068] First, the transition plate 3 is fixed to the dynamic balancing equipment using the first fixing bolt 33; then, the tapered mandrel 2 is fixed to the transition plate 3 using the second fixing bolt 34.

[0069] The tapered elastic sleeve 4 is installed on the pull rod 5 and connected to the internal thread hole of the transition plate 3 through the external thread at the bottom of the pull rod 5. The tapered elastic sleeve 4 is sleeved on the outside of the tapered mandrel 2.

[0070] When the pull rod 5 is rotated forward, it can be screwed into the internal threaded hole of the transition plate 3. This pushes the tapered elastic sleeve 4 downward along the vertical portion 22 towards the transverse portion 21 via the pushing assembly. After the tapered elastic sleeve 4 moves downward to a height greater than the height of the truncated cone corresponding to the vertical portion 22, the pull rod 5 is rotated forward again. Because the tapered mandrel 2 has a taper, the tapered elastic sleeve 4 expands, causing the abutment block 42 to abut against the inner wall of the pulley 1 to be tested, thus completing the positioning of the pulley 1 to be tested.

[0071] Based on the same technical concept, this application also discloses a dynamic balance rapid detection device that uses the above-mentioned pulley positioning device, including the pulley positioning device and the dynamic balance detection device. The pulley positioning device is used to position the pulley to be tested onto the dynamic balance detection device, and then the dynamic balance detection device performs dynamic balance detection on the pulley to be tested.

[0072] The pulley positioning device enables a quick, gapless fit with the inner hole of the pulley to be tested, facilitating accurate, efficient, and convenient inspection of the pulley's dynamic balance parameters.

[0073] The terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0074] 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0075] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0076] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A pulley positioning device, characterized in that, It includes a tapered mandrel (2) for connecting to a connection structure corresponding to the pulley (1) to be tested, and a tie rod sub-assembly for positioning the pulley (1) to be tested onto the tapered mandrel (2); The pull rod assembly includes a tapered elastic sleeve (4), a pull rod (5), and a push assembly disposed at the top of the pull rod (5). The tapered elastic sleeve (4) has an inner hole. The outer wall of the tapered spindle (2) abuts against the inner hole wall of the tapered elastic sleeve (4). The tapered elastic sleeve (4) includes an abutment block (42). The outer wall of the abutment block (42) abuts against the inner hole wall of the pulley (1) to be tested. The pull rod (5) is inserted into the inner hole of the tapered elastic sleeve (4) and the inner hole of the tapered spindle (2). The push assembly abuts against the top surface of the tapered elastic sleeve (4). The tapered mandrel (2) includes a tapered portion, the outer diameter of which gradually increases in the direction away from the push assembly. By rotating the pull rod (5), the pull rod (5) moves along its axial direction, and the push assembly pushes the tapered elastic sleeve (4) to move along the tapered mandrel (2), so that the tapered portion drives the tapered elastic sleeve (4) to expand.

2. The pulley positioning device according to claim 1, characterized in that, The inner hole of the tapered elastic sleeve (4) includes a first part (43), the hole wall of the first part (43) is tapered, and the hole diameter of the first part (43) gradually increases in the direction away from the push assembly.

3. The pulley positioning device according to claim 2, characterized in that, The taper corresponding to the first part (43) is the same as the taper corresponding to the taper part.

4. The pulley positioning device according to claim 3, characterized in that, The maximum aperture corresponding to the first part (43) is equal to the maximum outer diameter of the tapered portion of the tapered mandrel (2), and the truncated cone height corresponding to the first part (43) is equal to the truncated cone height corresponding to the tapered portion of the tapered mandrel (2).

5. A pulley positioning device according to claim 3, characterized in that, The inner hole of the tapered elastic sleeve (4) further includes a second part (44) and a third part (45). The first part (43), the second part (44) and the third part (45) are interconnected. The third part (45) is located at the top wall of the tapered elastic sleeve (4). The pull rod (5) passes through the third part (45). The diameter of the third part (45) is smaller than the diameter of the second part (44). The pull rod (5) is fixedly connected to a second limiting plate (51), which is located at the second part (44). The diameter of the second limiting plate (51) is larger than the hole diameter of the third part (45). The upper surface of the second limiting plate (51) abuts against the top wall of the inner hole of the tapered elastic sleeve (4).

6. A pulley positioning device according to claim 1, characterized in that, The tapered mandrel (2) may include an integrally formed transverse portion (21) and a vertical portion (22). The outer wall of the vertical portion (22) abuts against the inner hole wall of the tapered elastic sleeve (4). A transition plate (3) is provided between the tapered mandrel (2) and the connecting structure. The transition plate (3) is fixedly connected to the connecting structure. The transverse portion (21) is fixedly connected to the transition plate (3).

7. A pulley positioning device according to claim 1, characterized in that, The tapered elastic sleeve (4) also includes a sleeve body (41), the abutting block (42) is integrally formed with the outer wall of the sleeve body (41), the abutting block (42) is a ring-shaped structure that protrudes laterally from the sleeve body (41), and the bottom surface of the abutting block (42) is higher than the bottom surface of the sleeve body (41).

8. A pulley positioning device according to claim 6, characterized in that, The pushing assembly includes a rotating cap (6) and a fixing pin (7). The rotating cap (6) includes a cap body (61) and a first limiting plate (62) integrally formed with the bottom of the cap body (61). The top of the pull rod (5) is inserted into the cap body (61). The fixing pin (7) passes through the cap body (61) and the pull rod (5). The bottom surface of the first limiting plate (62) away from the cap body (61) abuts against the top surface of the tapered elastic sleeve (4) away from the transverse portion (21).

9. A pulley positioning device according to claim 6, characterized in that, The transverse portion (21) is provided with a plurality of fourth threaded holes (212). Through each of the fourth threaded holes (212), the transverse portion (21) is threadedly connected to an adjustable support pin (23) for supporting the pulley (1) to be tested. The adjustable support pin (23) includes a pin top and a pin body. The pin body is connected to the fourth threaded hole (212). The upper surface of the pin top abuts against the lower surface of the pulley (1) to be tested. The pin top is provided with an adjustment hole (231) for rotating the adjustable support pin (23).

10. A dynamic balancing rapid detection device for the pulley positioning device according to any one of claims 1 to 8, characterized in that, The device includes a pulley positioning device and a dynamic balancing detection device. The pulley positioning device is used to position the pulley (1) to be tested onto the dynamic balancing detection device, and the dynamic balancing detection device is used to perform dynamic balancing detection on the pulley (1) to be tested.

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