Motor shaft assembly fixture

Abstract

The utility model relates to the technical fields of motor, disclose a motor rotating shaft assembly fixture, first clamp group, including first fixed base, first chuck and first adjustment part, first chuck is connected in first fixed base, and first chuck is equipped with first clamping mouth, and first adjustment part removal is connected in first fixed base, and the outer periphery of first clamping mouth is equipped with first adjustment inclined plane, and first adjustment part is equipped with the second adjustment inclined plane that sticks with first adjustment inclined plane, second clamp group, including second fixed base, second chuck and second adjustment part, second chuck is connected in second fixed base, and second chuck is equipped with clamping channel, and second adjustment part removal is connected in second fixed base, and one end away from first clamp group of second chuck is equipped with third adjustment inclined plane, and second adjustment part is equipped with the fourth adjustment inclined plane that sticks with third adjustment inclined plane, the utility model discloses motor rotating shaft assembly fixture, promotes the assembly consistency of multiple motor rotating shaft, promotes the adhesion coaxial degree of small rotating shaft, magnet bar and big rotating shaft assembly.

Description

Technical Field

[0001] This utility model relates to the technical field of motors, and in particular to a motor shaft assembly fixture. Background Technology

[0002] Currently, typical galvanometer motor shafts usually adopt a three-section structure, including a magnetic rod in the middle and small and large shafts connected to the two ends of the magnetic rod, respectively. The magnetic rod is made of permanent magnet and forms an electromagnetic drive system with the motor stator coils; the small shaft is located at one end of the magnetic rod and connects to the sensor section, mating with the inner ring of a small bearing on the motor housing; the large shaft is located at the other end of the magnetic rod and mounts the galvanometer mirror, mating with the inner ring of a large bearing. To achieve structural integration and functional transfer, both the small and large shafts have axial assembly grooves at their ends facing the magnetic rod. The two ends of the magnetic rod are inserted into these assembly grooves and fixed with adhesive, thus bonding the three components into a single rotating shaft assembly.

[0003] If there is eccentricity or tilting during assembly, it will cause the center of gravity of the rotating shaft assembly to shift, resulting in vibration and noise during high-speed operation, accelerating bearing wear, and in severe cases, even causing motor failure. In the existing technology, simple clamping fixtures or manual alignment methods are often used for assembly, which makes it difficult to guarantee the consistency and accuracy of each assembly. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. It provides a motor shaft assembly fixture that improves the assembly consistency of multiple motor shafts and enhances the bonding and coaxiality of the small shaft, magnetic rod, and large shaft after assembly.

[0005] To achieve the above objectives, this utility model provides a motor shaft assembly fixture, a first fixture assembly, including a first fixed base, a first chuck and a first adjusting part. The first chuck is connected to the first fixed base and has a first clamping opening. The first adjusting part is movably connected to the first fixed base. A first adjusting slope is provided around the outer periphery of the first clamping opening, and the first adjusting part has a second adjusting slope that is in contact with the first adjusting slope. The second clamping assembly includes a second fixed base, a second clamp, and a second adjusting part. The second clamp is connected to the second fixed base and has a clamping channel. The second adjusting part is movably connected to the second fixed base. The end of the second clamp away from the first clamping assembly has a third adjusting slope, and the second adjusting part has a fourth adjusting slope that is in contact with the third adjusting slope. The first clamp group and the second clamp group are arranged axially spaced apart, and the first clamping jaw, the first adjusting slope, the second adjusting slope, the clamping channel, the third adjusting slope, and the fourth adjusting slope are arranged coaxially.

[0006] As a preferred embodiment, the first adjustment part includes a first elastic element, a first pressure ring, and a first movable ring. The first fixed base is provided with a first cavity. The first clamp is connected to the first cavity and passes through the first elastic element and the first pressure ring respectively. The first elastic element and the first pressure ring are located in the first cavity. One end of the first elastic element is connected to the first fixed base, and the other end is connected to the first pressure ring. The first movable ring is movably connected to the outer periphery of the first fixed base and is limitedly engaged with the first pressure ring. The second adjustment inclined surface is provided on the inner peripheral wall of the first pressure ring.

[0007] As a preferred embodiment, the first pressure ring includes a main ring body and a mating part. The mating part is connected to the end of the main ring body facing the first fixed seat. The mating part protrudes radially from the main ring body and is located within the first cavity. The diameter of the mating part is larger than the inner diameter of the first movable ring, and the diameter of the main ring body is smaller than the inner diameter of the first movable ring. The main ring body extends toward the second clamping group through the first movable ring, and the first clamp passes through the main ring body and the mating part in sequence.

[0008] As a preferred embodiment, the first chuck is provided with at least one first adjustment groove extending axially, the first adjustment groove passing through the end face of the first chuck toward the second clamping group, and the first adjustment groove being located on the outer periphery of the second adjustment slope.

[0009] As a preferred embodiment, the first fixed base is provided with an adjustment hole extending axially, and the end of the first chuck away from the second clamp assembly is threadedly connected to the adjustment hole.

[0010] As a preferred embodiment, the second adjustment part includes a second elastic element, a second pressure ring, and a second movable ring. The second fixed base has a second cavity extending axially. One end of the second clamp is connected to the second fixed base, and the other end extends through the second cavity in a direction away from the first clamp group. At least a portion of the second elastic element is located in the second cavity. The second pressure ring is located at the end of the second fixed base away from the first clamp group. One end of the second elastic element is connected to the second fixed base, and the other end is connected to the second pressure ring. The second elastic element is located on the outer periphery of the second clamp. The second movable ring is movably connected to the outer periphery of the second fixed base. The second movable ring is in a limiting fit with the second pressure ring. The third adjustment inclined surface is provided on the inner peripheral wall of the second pressure ring.

[0011] As a preferred embodiment, the second pressure ring includes a pressure ring body and a connecting part. The connecting part is connected around the outer periphery of the pressure ring body at the end away from the second movable ring. The pressure ring body is provided with a clamping fit hole. The third adjusting inclined surface is the inner peripheral surface of the clamping fit hole. The clamping fit hole is coaxially arranged with the clamping channel. One end of the second elastic element is connected to the connecting part. The connecting part is limited to the second movable ring.

[0012] As a preferred embodiment, the second chuck is provided with at least one second adjustment groove extending axially, the second adjustment groove penetrating the end face of the second chuck away from the direction of the first clamping group, and the second adjustment groove is located at least on the outer periphery of the fourth adjustment slope.

[0013] As a preferred embodiment, the second chuck includes a connecting plate and a chuck body. The connecting plate is connected to the end of the second fixing seat facing the first clamp group, and the chuck body is connected to the connecting plate. The chuck body extends in a direction away from the first clamp group. The end of the chuck body away from the first clamp group is provided with a second adjustment groove and a fourth adjustment slope, respectively. The second adjustment groove penetrates the chuck body radially, and the clamping channel penetrates the connecting plate and the chuck body axially in sequence.

[0014] As a preferred embodiment, the clamping channel includes a magnetic rod positioning channel and a second clamping opening that are sequentially connected along the axial direction, and the magnetic rod positioning channel, the second clamping opening, and the first clamping opening are coaxially arranged.

[0015] Compared with the prior art, the present invention discloses a motor shaft assembly fixture with the following advantages: A first fixture group is used to clamp the small shaft of the motor shaft. A first chuck is connected to a first fixed base for fixation. A first clamping jaw is provided at the end of the first chuck facing the second fixture group, and the first clamping jaw is used to clamp the small shaft. A first adjusting part is movably connected to the first fixed base. A first adjusting slope is provided around the outer periphery of the first clamping jaw, and the first adjusting part has a second adjusting slope. The first adjusting slope and the second adjusting slope are in contact and can move relative to each other. As the first adjusting part moves towards the first fixed base, the diameter of the first clamping jaw increases, thereby loosening the small shaft and allowing it to be removed. As the first adjusting part moves towards the second fixture group, the diameter of the first clamping jaw decreases, thereby clamping the small shaft and preparing it for the assembly of the magnetic rod and the small shaft. The second fixture group is used to position the magnetic rod and... The large rotating shaft is fixed by a second chuck connected to a second fixed base. The second chuck has a clamping channel. The magnetic rod and the large rotating shaft are assembled into the clamping channel so that one end of the magnetic rod is bonded to the small rotating shaft and the other end of the magnetic rod is bonded to the large rotating shaft. The second adjusting part is movably connected to the second fixed base. The end of the second chuck away from the first clamping assembly has a third adjusting slope, and the second adjusting part has a fourth adjusting slope. The third adjusting slope and the fourth adjusting slope are in contact and can move relative to each other. When the second adjusting part moves away from the first fixed base, the opening diameter of the clamping channel at the end away from the first fixed base increases, making it easier for the magnetic rod and the large rotating shaft to be inserted into the clamping channel. After the magnetic rod is inserted, it is assembled with the small rotating shaft. The large rotating shaft and the magnetic rod are assembled with the large rotating shaft. When the second adjusting part moves towards the first fixed base, the opening diameter of the clamping channel at the end away from the first fixed base decreases, thus clamping the large rotating shaft. The first clamping set and the second clamping set are spaced apart along the axial direction so that the small rotating shaft can be inserted into the first clamping opening through the gap. The first clamping opening, the first adjusting slope, the second adjusting slope, the clamping channel, the third adjusting slope, and the fourth adjusting slope are coaxially arranged to improve the assembly consistency of multiple motor rotating shafts and improve the bonding coaxiality of the small rotating shaft, the magnetic rod, and the large rotating shaft after assembly. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0017] Figure 2 This is a schematic cross-sectional view of the overall structure of an embodiment of this utility model.

[0018] Figure 3 This is a schematic diagram of the structure of the first clamp group in the embodiment of this utility model.

[0019] Figure 4 This is a structural schematic diagram of the first fixed base in an embodiment of this utility model.

[0020] Figure 5 This is a schematic diagram of the structure of the first pressure ring in an embodiment of this utility model.

[0021] Figure 6 This is a schematic diagram of the structure of the first chuck in an embodiment of this utility model.

[0022] Figure 7 This is a schematic diagram of the assembly structure of the second clamp group and the motor shaft in an embodiment of this utility model.

[0023] Figure 8 This is a cross-sectional schematic diagram of the assembly structure of the second clamp group and the motor shaft in an embodiment of this utility model.

[0024] Figure 9 This is a schematic diagram of the structure of the second clamp in an embodiment of this utility model.

[0025] Figure 10 This is a cross-sectional structural diagram of the second clamp in an embodiment of the present invention.

[0026] Figure 11 This is a schematic diagram of the structure of the second pressure ring in an embodiment of this utility model.

[0027] Figure 12 This is a schematic diagram of the existing motor shaft.

[0028] In the picture: 10. First clamping assembly; 11. First fixed base; 12. First cavity; 13. Adjustment hole; 14. First chuck; 15. First clamping jaw; 16. First adjusting slope; 17. First adjusting groove; 18. First adjusting part; 19. First elastic element; 20. First pressure ring; 21. Main ring body; 22. Mating part; 23. First movable ring; 24. Second adjusting slope; 25. First mounting plate; 26. First fixing screw sleeve; 27. Adjusting disc; 30. Second clamping assembly; 31. Second fixed base; 32. Second cavity; 33. Second chuck; 34. Connecting plate; 35. Chuck body; 65. Second adjusting groove; 36. Third adjusting ramp; 37. Clamping channel; 38. Magnetic rod positioning channel; 39. Second clamping jaw; 40. Second adjusting part; 41. Second elastic element; 42. Second pressure ring; 43. Pressure ring body; 44. Pressing mating hole; 45. Connecting part; 46. Second movable ring; 47. Fourth adjusting ramp; 48. Magnetic rod positioning sleeve; 49. Elastic sheet; 50. Motor shaft; 51. Small shaft; 52. Large shaft; 531. First assembly slot; 532. Second assembly slot; 54. Magnetic rod; Detailed Implementation

[0029] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0030] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" used to indicate the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] In the description of this utility model, it should be understood that the terms "connected," "linked," and "fixed," etc., used in this utility model should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or a welded connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly defined. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] like Figures 1 to 12 As shown, a preferred embodiment of the present invention provides a motor shaft assembly fixture. A first fixture group 10 includes a first fixed base 11, a first chuck 14, and a first adjusting part 18. The first chuck 14 is connected to the first fixed base 11 and has a first clamping opening 15. The first adjusting part 18 is movably connected to the first fixed base 11, and a first adjusting slope 16 surrounds the outer periphery of the first clamping opening 15. The first adjusting part 18 has a second adjusting slope 24 that is in contact with the first adjusting slope 16. A second fixture group 30 includes a second fixed base 31, a second chuck 33, and a second adjusting part 40. The second chuck 33 is connected to the second fixed base 31 and has a clamping channel 37. The second adjusting part 40 is movably connected to the second fixed base 31, and a third adjusting slope 36 is provided at the end of the second chuck 33 away from the first fixture group 10. The second adjusting part 40 has a fourth adjusting slope 47 that is in contact with the third adjusting slope 36. The first clamp group 10 and the second clamp group 30 are arranged axially at intervals, and the first clamping opening 15, the first adjusting slope 16, the second adjusting slope 24, the clamping channel 37, the third adjusting slope 36, and the fourth adjusting slope 47 are arranged coaxially.

[0033] This utility model discloses a motor shaft assembly fixture. A first fixture group 10 is used to clamp the small shaft 51 of the motor shaft 50. A first chuck 14 is connected to a first fixed base 11 for fixation. One end of the first chuck 14 facing the second fixture group 30 has a first clamping opening 15 for clamping the small shaft 51. A first adjusting part 18 is movably connected to the first fixed base 11. A first adjusting slope 16 is provided around the outer periphery of the first clamping opening 15. The first adjusting part 18 has a second adjusting slope 24. 16 is in contact with and can move relative to the second adjusting inclined surface 24. The first adjusting part 18 moves toward the first fixed seat 11, increasing the diameter of the first clamp 15 to loosen the small rotating shaft 51, allowing it to be removed. The first adjusting part 18 then moves toward the second clamp group 30, decreasing the diameter of the first clamp 15 to clamp the small rotating shaft 51, preparing for the assembly of the magnetic rod 54 and the small rotating shaft 51. The second clamp group 30 is used to position the magnetic rod 54 and the large rotating shaft 52. The second chuck 33 is connected to the second... The fixing base 31 provides fixation. The second clamp 33 has a clamping channel 37. The magnetic rod 54 and the large rotating shaft 52 are assembled into the clamping channel 37, so that one end of the magnetic rod 54 is bonded to the small rotating shaft 51 and the other end of the magnetic rod 54 is bonded to the large rotating shaft 52. The second adjusting part 40 is movably connected to the second fixing base 31. The end of the second clamp 33 away from the first clamp assembly 10 has a third adjusting slope 36, and the second adjusting part 40 has a fourth adjusting slope 47. The third adjusting slope 36 and the fourth adjusting slope 47 are in contact and can be adjusted. When the second adjustment part 40 moves away from the first fixed base 11, the opening diameter of the clamping channel 37 at the end away from the first fixed base 11 increases, making it easier for the magnetic rod 54 and the large rotating shaft 52 to be inserted into the clamping channel 37. This allows the magnetic rod 54 to be inserted and assembled with the small rotating shaft 51, and the large rotating shaft 52 to be assembled with the magnetic rod 54. When the second adjustment part 40 moves toward the first fixed base 11, the opening diameter of the clamping channel 37 at the end away from the first fixed base 11 decreases, thus clamping the large rotating shaft 52. The first clamp group 10 and the second clamp group 30 are spaced apart axially so that the small rotating shaft 51 can be inserted into the first clamping opening 15 through the gap. The first clamping opening 15, the first adjusting slope 16, the second adjusting slope 24, the clamping channel 37, the third adjusting slope 36, and the fourth adjusting slope 47 are coaxially arranged to improve the assembly consistency of multiple motor rotating shafts 50 and improve the bonding coaxiality of the small rotating shaft 51, the magnetic rod 54, and the large rotating shaft 52 after assembly.

[0034] It should be noted that, for example Figure 12As shown, the motor shaft 50 in a conventional galvanometer motor comprises three parts: the first part is a magnetic rod 54 made of permanent magnet; the second part is a small shaft 51, used to connect the other end of the magnetic rod 54 to the sensor part; and the third part is a large shaft 52, used to connect one end of the magnetic rod 54 to the galvanometer mirror. The end of the small shaft 51 is used to connect with the inner ring of the small shaft 51 bearing on the motor; and it is used to connect with the inner ring of the large shaft 52 bearing on the motor. The assembly fixture of this application is used to bond and fix the magnetic rod 54, the small shaft 51, and the large shaft 52 together as a single unit. The small rotating shaft 51, the magnetic rod 54, and the large rotating shaft 52 are arranged sequentially along the axial direction. The small rotating shaft 51 is provided with a first assembly groove 531 on the side facing the magnetic rod 54, and the large rotating shaft 52 is provided with a second assembly groove 532 on the side facing the magnetic rod 54. The two ends of the magnetic rod 54 are respectively inserted into the first assembly groove 531 and the second assembly groove 532 to achieve bonding and assembly with the small rotating shaft 51 and the large rotating shaft 52 respectively.

[0035] Furthermore, such as Figures 1 to 6As shown, the first adjustment part 18 includes a first elastic element 19, a first pressure ring 20, and a first movable ring 23. The first fixed base 11 has a first cavity 12, and a first clamp 14 is connected to the first cavity 12. The first clamp 14 passes through the first elastic element 19 and the first pressure ring 20 respectively. The first elastic element 19 and the first pressure ring 20 are located inside the first cavity 12. One end of the first elastic element 19 is connected to the first fixed base 11, and the other end is connected to the first pressure ring 20. The first movable ring 23 is movably connected to the outer periphery of the first fixed base 11 and is limitedly engaged with the first pressure ring 20. The second adjustment inclined surface 24 is provided on the inner peripheral wall of the first pressure ring 20. The first fixed base 11 has a first cavity 12, and the first clamp 14 is connected to the first fixed base 11 and located inside the first cavity 12 to fix the first clamp 14. The first cavity 12 provides assembly space for the first clamp 14. The first clamp 14 passes through the first elastic member 19 and the first pressure ring 20. The first elastic member 19 and the first pressure ring 20 are coaxially sleeved on the outer periphery of the first clamp 14 and housed in the first cavity 12. One end of the first elastic member 19 is connected to the first fixed seat 11, and the other end is connected to the first pressure ring 20, providing the first pressure ring 20 with a reset or pre-tightening elastic force. The first movable ring 23 is movably connected to the outer periphery of the first fixed base 11 and forms a limiting fit with the first pressure ring 20. By pushing the first movable ring 23, the first pressure ring 20 is moved axially. The second adjusting slope 24 on the inner periphery of the first pressure ring 20 acts evenly on the first adjusting slope 16 on the outer periphery of the first chuck 14, so that the first chuck 14 is subjected to uniform radial force, avoiding local stress concentration, thereby achieving uniform clamping of the small rotating shaft 51. When the first movable ring 23 is operated, the first movable ring 23 pushes the first pressure ring 20 to move axially through the limiting fit. The second adjusting slope 24 on the inner periphery of the first pressure ring 20 interacts with the first adjusting slope 16 on the first chuck 14, forcing the first chuck 14 to undergo radial elastic deformation, thereby opening or closing the first clamping jaw 15, completing the loosening or clamping action of the small rotating shaft 51. The first elastic element 19 provides an automatic reset function, improving the convenience of operation and the consistency of response.

[0036] As one embodiment, such as Figures 1 to 6 As shown, the first movable ring 23 moves toward the first fixed base 11. When the first movable ring 23 pushes the first pressure ring 20 to move synchronously toward the first fixed base 11, the first pressure ring 20 squeezes the first elastic element 19, and the first clamp 15 opens to facilitate the insertion of the small rotating shaft 51 into the first clamp 15. After the first rotating shaft is inserted into the first clamp 15, the first movable ring 23 moves toward the second clamp group 30. When the first pressure ring 20 moves synchronously toward the second clamp group 30 under the pushing force of the first elastic element 19, the first clamp 15 closes to clamp the small rotating shaft 51. The first assembly groove 531 of the small rotating shaft 51 faces the second clamp group 30 to prepare for assembly with the magnetic rod 54.

[0037] As one embodiment, such as Figures 1 to 6 As shown, the inner circumferential surface of the first movable ring 23 is threadedly connected to the outer circumferential surface of the first fixed seat 11, so that the first movable ring 23 and the first fixed seat 11 can move relative to each other along the axial direction when rotating.

[0038] As one embodiment, such as Figures 1 to 6 As shown, the first elastic element 19, the first pressure ring 20, and the first movable ring 23 are coaxially arranged. This improves the axial symmetry of the clamping force transmission and enhances clamping uniformity.

[0039] As one embodiment, such as Figures 1 to 6 As shown, the first adjusting inclined surface 16 has a first adjusting end and a second adjusting end at its two ends along the axial direction. The first adjusting end is closer to the first fixed seat 11, and the second adjusting end is closer to the second clamping assembly 30. The radial distance between the first adjusting end and the axis of the first chuck 14 is a mm, and the radial distance between the second adjusting end and the axis of the first chuck 14 is b mm, where a < b. The second adjusting inclined surface 24 on the first pressure ring 20 has a third adjusting end and a fourth adjusting end at its two ends along the axial direction. The third adjusting end is closer to the first fixed seat 11, and the fourth adjusting end is closer to the second clamping assembly 30. The radial distance between the third adjusting end and the axis of the first pressure ring 20 is c mm, and the radial distance between the fourth adjusting end and the axis of the first pressure ring 20 is d mm, where c < d.

[0040] As one embodiment, such as Figures 1 to 6As shown, the first fixed base 11 includes a first mounting plate 25, a first fixing sleeve 26, and an adjusting plate 27. The adjusting plate 27 is bolted to the end of the first mounting plate 25 away from the second clamping assembly 30. The first fixing sleeve 26 is bolted to the end of the first mounting plate 25 facing the second clamping assembly 30. A portion of the first cavity 12 is disposed on the first mounting plate 25 and a portion is disposed on the first fixing sleeve 26. One end of the first elastic element 19 is connected to the adjusting plate 27, and the other end is connected to the first pressure ring 20. The first movable ring 23 is threadedly connected to the outer peripheral wall of the first fixing sleeve 26. One end of the first chuck 14 is connected to the adjusting plate 27. The first mounting plate 25, the first fixing sleeve 26, and the adjusting plate 27 are coaxially arranged. The first fixed base 11 adopts a split structure, consisting of the adjusting plate 27, the first mounting plate 25, and the first fixing sleeve 26 connected by bolts. Each component can be independently processed, assembled, and replaced. The first chuck 14 is connected to the adjusting plate 27, which is connected to the first mounting plate 25 via bolts. By adjusting the axial mounting position of the adjusting plate 27, the initial position of the first chuck 14 in its free state can be preset, thereby precisely controlling the initial opening and closing amount and clamping stroke of the first clamping jaw 15. Simultaneously, one end of the first elastic element 19 is fixed to the adjusting plate 27, and its initial compression amount can also be adjusted accordingly, achieving flexible setting of the clamping force to adapt to the clamping requirements of small rotating shafts 51 of different diameters or materials. The first movable ring 23 is threadedly connected to the outer circumference of the first fixed threaded sleeve 26. Rotating the first movable ring 23 achieves axial movement, thereby pushing the first pressure ring 20 to compress the first elastic element 19, triggering the inclined plane transmission to complete the clamping action. The threaded transmission makes it easier to achieve precise control of the clamping force, and the clamping state is more stable and reliable.

[0041] In one embodiment, the first elastic element 19 is a compression spring.

[0042] Furthermore, such as Figures 1 to 6As shown, the first pressure ring 20 includes a main ring body 21 and a mating part 22. The mating part 22 is connected around the end of the main ring body 21 facing the first fixed seat 11. The mating part 22 protrudes radially from the main ring body 21 and is located inside the first cavity 12. The diameter of the mating part 22 is larger than the inner diameter of the first movable ring 23, and the diameter of the main ring body 21 is smaller than the inner diameter of the first movable ring 23. The main ring body 21 extends towards the second clamping assembly 30 through the first movable ring 23. The first clamp 14 passes through the main ring body 21 and the mating part 22 in sequence. The main ring body 21 has an annular structure and is fitted around the outer periphery of the first clamp 14. The main ring body 21 can pass through the inner hole of the first movable ring 23. The mating part 22 is connected around the main ring body 21 and protrudes radially outward to form a stepped structure. The first movable ring 23 cannot pass over the mating part 22 and can only form a limiting contact with the end face of the mating part 22. The main ring 21 passes through the first movable ring 23 and extends towards the second clamping assembly 30, thus engaging with the first adjusting ramp 16 of the first chuck 14. The first chuck 14 passes sequentially through the main ring 21 and the engaging part 22, ensuring coaxial movement of the first pressure ring 20 and the first chuck 14. The engaging part 22 receives the axial thrust from the first movable ring 23; the main ring 21 acts as the transmission body, transmitting the thrust to the first chuck 14 via the second adjusting ramp 24 on its inner circumference. The second adjusting ramp 24 on the circumferential wall of the main ring 21 is always in contact with the first adjusting ramp 16 of the first chuck 14, ensuring the continuity of the ramp transmission and the stability of the contact area during the clamping and releasing process of the first chuck 14, avoiding fluctuations in clamping force due to gaps or misalignments, thereby achieving smooth and uniform clamping of the small rotating shaft 51.

[0043] Furthermore, such as Figures 1 to 6 As shown, the first chuck 14 is provided with at least one axially extending first adjustment groove 17, which penetrates the end face of the first chuck 14 toward the second clamping assembly 30 and is located on the outer periphery of the second adjustment ramp 24. A groove is formed from one end face of the first chuck 14 toward the second clamping assembly 30, extending to a certain depth toward the first fixed seat 11, without penetrating the other end, forming a partially open structure. The axially extending first adjustment groove 17 on the first chuck 14 enhances the radial elastic deformation capability of the first clamping jaw 15. When the first pressure ring 20 moves axially, the second adjustment ramp 24 acts on the first adjustment ramp 16 on the outer periphery of the first chuck 14, pushing the first clamping jaw 15 to contract or open radially. The provision of the first adjustment groove 17 reduces the structural stiffness of the area of ​​the first clamping jaw 15, making it easier to generate elastic deformation, thereby realizing the opening and closing of the first clamping jaw 15.

[0044] As one embodiment, such as Figures 1 to 6As shown, when multiple first adjustment slots 17 are symmetrically arranged in the circumferential direction of the first chuck 14, multiple elastic petal-shaped structures are formed at the end of the first chuck 14 facing the second clamping group 30. Under the thrust of the second adjustment inclined surface 24, the first pressure ring 20 causes each elastic petal-shaped structure to synchronously contract toward the center of the first clamping opening 15 or open outward, ensuring that the first clamping opening 15 always maintains its circular outline and geometric center during the clamping process, avoiding eccentric clamping caused by uneven deformation, thereby further ensuring that the small rotating shaft 51 is accurately positioned on the main axis and improving the overall assembly coaxiality.

[0045] Furthermore, such as Figures 1 to 6 As shown, the first fixed base 11 is provided with an axially extending adjustment hole 13, and the end of the first chuck 14 away from the second fixture assembly 30 is threadedly connected to the adjustment hole 13. By rotating the first chuck 14, its depth of insertion into the first fixed base 11 can be adjusted, thereby controlling the axial position of the first chuck 14 relative to the entire fixture and adapting to the conversion requirements of small rotating shafts 51 of different lengths. The threaded connection makes the first chuck 14 a modular component that can be quickly replaced. When it is necessary to adapt to small rotating shafts 51 of different diameters or structures, simply unscrew the original first chuck 14 and replace it with a new chuck with the corresponding first clamping jaw 15 size, without replacing the entire fixture assembly, thus improving the versatility and production flexibility of the fixture.

[0046] Furthermore, such as Figures 7 to 11As shown, the second adjustment part 40 includes a second elastic element 41, a second pressure ring 42, and a second movable ring 46. The second fixed base 31 has a second cavity 32 extending axially. One end of the second clamp 33 is connected to the second fixed base 31, and the other end extends through the second cavity 32 in a direction away from the first clamp group 10. At least a portion of the second elastic element 41 is located in the second cavity 32. The second pressure ring 42 is located at the end of the second fixed base 31 away from the first clamp group 10. One end of the second elastic element 41 is connected to the second fixed base 31, and the other end is connected to the second pressure ring 42. The second elastic element 41 is located on the outer periphery of the second clamp 33. The second movable ring 46 is movably connected to the outer periphery of the second fixed base 31. The second movable ring 46 and the second pressure ring 42 are in a limiting fit. The third adjustment inclined surface 36 is provided on the inner peripheral wall of the second pressure ring 42. The second fixed base 31 has a second cavity 32 extending axially, which provides an installation channel for the second clamp 33 and the second elastic element 41. One end of the second clamp 33 is connected to the second fixed base 31 for fixation, and the second clamp 33 is used to accommodate the large rotating shaft 52 and the magnetic rod 54. The second elastic element 41 always provides tension to the second pressure ring 42. That is, when no external force is applied, the second pressure ring 42 is pulled towards the second fixed base 31 by the second elastic element 41, so that the clamping channel 37 is in a clamped state; when it is necessary to loosen the clamp to insert the large rotating shaft 52 and the magnetic rod 54, the second movable ring 46 needs to be pushed by an external force to overcome the elastic tension, so that the second pressure ring 42 moves in the opposite direction, thereby expanding the opening of the clamping channel 37. The second movable ring 46 pushes the second pressure ring 42 to move axially away from the first clamp group 10, so that the fourth adjusting slope 47 on the inner circumference of the second pressure ring 42 interacts with the third adjusting slope 36 on the outer circumference of the second clamp 33, forcing the opening of the clamping channel 37 to open radially, thereby realizing the insertion or removal of the large rotating shaft 52 and the magnetic rod 54 in the clamping channel 37.

[0047] As one embodiment, such as Figures 7 to 11 As shown, the second elastic element 41 is a tension spring.

[0048] As one embodiment, such as Figures 7 to 11 As shown, multiple second elastic elements 41 are evenly spaced along the circumference of the second clamp 33. The multiple second elastic elements 41 are symmetrically arranged in the circumferential direction of the second clamp 33, so that the axial tensile force applied to the second pressure ring 42 is evenly distributed throughout the entire annular cross section, avoiding the second pressure ring 42 from tilting, swaying or jamming due to unilateral or local force, and improving the uniformity of the clamping force of the second clamping assembly 30.

[0049] Furthermore, such as Figures 7 to 11As shown, the second pressure ring 42 includes a pressure ring body 43 and a connecting part 45. The connecting part 45 is connected around the outer periphery of the pressure ring body 43 at the end away from the second movable ring 46. The pressure ring body 43 is provided with a clamping hole 44. The fourth adjusting slope 47 is the inner peripheral surface of the clamping hole 44, which is used to fit and transmit power with the third adjusting slope 36 on the second chuck 33. The clamping hole 44 is coaxially arranged with the clamping channel 37 to ensure that the clamping force is transmitted symmetrically along the central axis. One end of the second elastic member 41 is connected to the connecting part 45. The second pressure ring 42 is pulled towards the second fixed seat 31 by the pulling force of the second elastic member 41. The connecting part 45 is limited to the second movable ring 46. When the second movable ring 46 moves axially, its end face abuts against the connecting part 45, pushing the second pressure ring 42 to move in the opposite direction to open the clamp. The connecting part 45 is arranged around the outer periphery of the pressure ring body 43 and is matched with the second movable ring 46 to form a circumferentially uniform thrust contact surface, preventing the second pressure ring 42 from deflecting or tilting during the pushing process. At the same time, the clamping hole 44 is coaxially arranged with the clamping channel 37, ensuring that the fourth adjusting slope 47 and the third adjusting slope 36 of the second chuck 33 are uniformly fitted around the entire circumference, so that the clamping channel 37 always maintains concentric deformation during the contraction or expansion process, avoiding clamping eccentricity and ensuring the positioning accuracy of the large rotating shaft 52.

[0050] As one embodiment, such as Figures 7 to 11 As shown, the connecting part 45 has an axial gap with the second movable ring 46 in the initial state, that is, the connecting part 45 and the second movable ring 46 do not contact each other when no external force is applied. When the second chuck 33 needs to loosen, remove or insert the large rotating shaft 52, the second movable ring 46 moves relative to the second fixed seat 31 toward the connecting part 45 until it contacts the connecting part 45 and pushes the connecting part 45 away from the second chuck 33. This causes the fourth adjusting slope 47 on the inner circumference of the second pressure ring 42 to slide relative to the third adjusting slope 36 on the outer circumference of the second chuck 33, forcing the opening of the clamping channel 37 to widen, thereby releasing the large rotating shaft 52.

[0051] The second movable ring 46 moves toward the second fixed seat 31, i.e., moves in the opposite direction. The second movable ring 46 separates from the connecting part 45, and the second movable ring 46 no longer applies a pushing force to the second pressure ring 42. The axial tension applied by the second elastic element 41 to the connecting part 45 pulls the second pressure ring 42 back toward the second fixed seat 31. The fourth adjusting slope 47 and the third adjusting slope 36 re-fit tightly, and the opening of the clamping channel 37 narrows, thus achieving the clamping of the large rotating shaft 52. The second movable ring 46 only contacts the connecting part 45 and applies a pushing force when it is released. The clamping process is completed independently by the second elastic element 41 without the need for continuous external force supply, reducing drive energy consumption.

[0052] As one embodiment, such as Figures 7 to 11As shown, the third adjusting slope 36 has a fifth adjusting end and a sixth adjusting end at its two ends along the axial direction. The fifth adjusting end is closer to the first fixed seat 11, and the sixth adjusting end is farther away from the first fixed seat 11. The radial distance between the fifth adjusting end and the axis of the second clamp 33 is e mm, and the radial distance between the sixth adjusting end and the axis of the second clamp 33 is f mm, where e > f. The fourth adjusting slope 47 on the second pressure ring 42 has a seventh adjusting end and an eighth adjusting end at its two ends along the axial direction. The seventh adjusting end is closer to the first fixed seat 11, and the eighth adjusting end is farther away from the first fixed seat 11. The radial distance between the seventh adjusting end and the axis of the second pressure ring 42 is g mm, and the radial distance between the eighth adjusting end and the axis of the second pressure ring 42 is h mm, where g > h.

[0053] Furthermore, such as Figures 7 to 11 As shown, the second chuck 33 is provided with at least one axially extending second adjustment groove 65. The second adjustment groove 65 penetrates the end face of the second chuck 33 opposite to the direction of the first clamping assembly 10. The second chuck 33 extends inward to a certain depth, forming a partial opening structure. The second adjustment groove 65 is located at least on the outer periphery of the fourth adjustment ramp 47. By providing an axially extending second adjustment groove 65 at the end of the second chuck 33, the elastic deformation capability of the second chuck 33 in the radial direction is enhanced. When the second pressure ring 42 moves axially, the fourth adjustment ramp 47 on the inner periphery of the second pressure ring 42 acts on the third adjustment ramp 36 on the outer periphery of the second chuck 33, pushing the end of the clamping channel 37 of the second chuck 33 to produce radial deformation. The second adjustment groove 65 can reduce the structural stiffness of this area, making it easier to elastically open or close under the action of the ramp thrust, thereby realizing the adjustment of the opening of the clamping channel 37.

[0054] As one embodiment, such as Figures 7 to 11 As shown, when multiple second adjustment slots 65 are symmetrically arranged in the circumferential direction of the second chuck 33, multiple elastic petal-shaped structures are formed at the end of the second chuck 33. Under the push of the fourth adjustment inclined surface 47, each elastic petal-shaped structure synchronously contracts towards the center to clamp or opens outward to relax, ensuring that the opening of the clamping channel 37 always maintains a circular outline and geometric center, avoiding eccentric clamping caused by uneven deformation, thereby ensuring that the large rotating shaft 52 is positioned on the main axis and improving the overall assembly coaxiality.

[0055] Furthermore, such as Figures 7 to 11As shown, the second chuck 33 includes a connecting plate 34 and a chuck body 35. The connecting plate 34 is connected to the end of the second fixed base 31 facing the first clamping assembly 10. The connecting plate 34 serves as a rigid connection and support component between the second chuck 33 and the second fixed base 31. The chuck body 35 is connected to the connecting plate 34 and extends in the direction away from the first clamping assembly 10, forming a functional section for clamping the magnetic rod 54 and the large rotating shaft 52. The end of the chuck body 35 away from the first clamping assembly 10 is provided with a second adjustment groove 65 and a fourth adjustment ramp 47. The second adjustment groove 65 penetrates the chuck body 35 radially, and the clamping channel 37 penetrates the connecting plate 34 and the chuck body 35 axially, forming a continuous workpiece accommodating space, which facilitates the insertion and positioning of the magnetic rod 54 and the large rotating shaft 52.

[0056] Furthermore, such as Figures 7 to 11 As shown, the clamping channel 37 includes a magnetic rod positioning channel 38 and a second clamping opening 39 connected sequentially along the axial direction. The magnetic rod positioning channel 38, the second clamping opening 39, and the first clamping opening 15 are coaxially arranged. The magnetic rod positioning channel 38 is located on the side of the clamping channel 37 closer to the first clamping fixture group 10, and is used to accommodate and position the magnetic rod 54 to ensure accurate insertion depth and axial position. The second clamping opening 39 is located on the side of the clamping channel 37 away from the first clamping fixture group 10, and is used to clamp and fix the large rotating shaft 52. The magnetic rod positioning channel 38 and the second clamping opening 39 are connected sequentially along the axial direction to form a continuous assembly path, which facilitates the insertion of the magnetic rod 54 and the subsequent insertion and positioning of the large rotating shaft 52. During the assembly process, the small rotating shaft 51 is clamped and centered by the first clamping opening 15, one end of the magnetic rod 54 is inserted into the small rotating shaft 51, and the other end is inserted into the magnetic rod positioning channel 38 for centering, while the large rotating shaft 52 is clamped by the second clamping opening 39. All three components are based on the same axis, which eliminates the cumulative error of eccentricity between each segment, improves the geometric coaxiality of the final rotating shaft assembly, and ensures the dynamic balance of the motor when it rotates at high speed.

[0057] As one embodiment, such as Figures 7 to 11 As shown, the chuck body 35 includes a magnetic rod positioning sleeve 48 and a plurality of elastic pieces 49. The magnetic rod positioning sleeve 48 is used to position the connection between the magnetic rod 54 and the small rotating shaft 51. The magnetic rod positioning sleeve 48 and the elastic pieces 49 are respectively connected to the connecting disk 34. The plurality of elastic pieces 49 are arranged at intervals around the outer periphery of the magnetic rod positioning sleeve 48. A second adjustment groove 65 is formed between adjacent elastic pieces 49. The end of the plurality of elastic pieces 49 away from the connecting disk 34 defines a second clamping opening 39.

[0058] Instructions for using this motor shaft assembly fixture: Bonding process: First, the first adjusting part 18 is moved toward the first fixed base 11, and the diameter of the first clamp 15 is increased so that the first clamp 15 is in a relaxed state; the second adjusting part 40 is moved away from the first fixed base 11, and the diameter of the second clamp 39 is increased so that the second clamp 39 is in a relaxed state. The second step is to evenly apply adhesive to the first assembly groove 531 on the small rotating shaft 51, and then install the small rotating shaft 51 through the second clamp 39 and the magnetic rod positioning channel 38 in sequence into the first clamp 15. The third step is to pass the magnetic rod 54 through the second clamp 39 and install it in the magnetic rod positioning channel 38, with one end inserted into the first assembly slot 531 on the small rotating shaft 51. Fourth step, apply adhesive evenly to the second assembly groove 532 on the large rotating shaft 52, and then install the large rotating shaft 52 into the second clamp 39 and insert the other end of the magnetic rod 54 into the second assembly groove 532 on the large rotating shaft 52; Fifth step, move the first adjusting part 18 toward the second clamping assembly 30, and reduce the diameter of the first clamping opening 15 to achieve clamping and positioning of the small rotating shaft 51; move the second adjusting part 40 toward the first fixed seat 11, and reduce the diameter of the second clamping opening 39 to achieve clamping and positioning of the large rotating shaft 52; wait for a certain period of time for the adhesive to solidify.

[0059] Removal process: First step, move the first adjustment part 18 toward the first fixed seat 11, the diameter of the first clamp 15 increases, so that the first clamp 15 is in a relaxed state; move the second adjustment part 40 away from the first fixed seat 11, the diameter of the second clamp 39 increases, so that the second clamp 39 is in a relaxed state; Second step, remove the glued motor shaft 50.

[0060] In summary, this utility model embodiment provides a motor shaft assembly fixture. A first fixture group 10 is used to clamp the small shaft 51 of the motor shaft 50. A first chuck 14 is connected to a first fixed base 11 for fixation. One end of the first chuck 14 facing the second fixture group 30 has a first clamping opening 15 for clamping the small shaft 51. A first adjusting part 18 is movably connected to the first fixed base 11. A first adjusting slope 16 surrounds the outer periphery of the first clamping opening 15, and the first adjusting part 18 has a second adjusting slope 24. The first adjusting inclined surface 16 and the second adjusting inclined surface 24 are in contact and can move relative to each other. The first adjusting part 18 moves towards the first fixed base 11, increasing the diameter of the first clamping jaw 15 to loosen the small rotating shaft 51 and allow it to be removed. The first adjusting part 18 then moves towards the second clamping assembly 30, decreasing the diameter of the first clamping jaw 15 to clamp the small rotating shaft 51, preparing for the assembly of the magnetic rod 54 and the small rotating shaft 51. The second clamping assembly 30 is used to position the magnetic rod 54 and the large rotating shaft 52. The second chuck 33... The second clamp 33 is fixed to the second fixed base 31. A clamping channel 37 is provided in the second clamp 33. The magnetic rod 54 and the large rotating shaft 52 are assembled into the clamping channel 37, so that one end of the magnetic rod 54 is bonded to the small rotating shaft 51, and the other end of the magnetic rod 54 is bonded to the large rotating shaft 52. The second adjusting part 40 is movably connected to the second fixed base 31. The end of the second clamp 33 away from the first clamp assembly 10 is provided with a third adjusting slope 36, and the second adjusting part 40 is provided with a fourth adjusting slope 47. The third adjusting slope 36 and the fourth adjusting slope 47 are in contact and... When the second adjustment part 40 moves away from the first fixed base 11, the opening diameter of the clamping channel 37 at the end away from the first fixed base 11 becomes larger, making it easier for the magnetic rod 54 and the large rotating shaft 52 to be inserted into the clamping channel 37. This allows the magnetic rod 54 to be inserted and assembled with the small rotating shaft 51, and the large rotating shaft 52 to be assembled with the magnetic rod 54. When the second adjustment part 40 moves toward the first fixed base 11, the opening diameter of the clamping channel 37 at the end away from the first fixed base 11 decreases, thus clamping the large rotating shaft 52. The first clamp group 10 and the second clamp group 30 are spaced apart axially so that the small rotating shaft 51 can be inserted into the first clamping opening 15 through the gap. The first clamping opening 15, the first adjusting slope 16, the second adjusting slope 24, the clamping channel 37, the third adjusting slope 36, and the fourth adjusting slope 47 are coaxially arranged to improve the assembly consistency of multiple motor rotating shafts 50 and improve the bonding coaxiality of the small rotating shaft 51, the magnetic rod 54, and the large rotating shaft 52 after assembly.

[0061] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of this utility model, and these improvements and substitutions should also be considered within the protection scope of this utility model.

Claims

1. A motor shaft assembly fixture, characterized in that: The first clamp assembly includes a first fixed base, a first chuck, and a first adjusting part. The first chuck is connected to the first fixed base and has a first clamping opening. The first adjusting part is movably connected to the first fixed base. A first adjusting slope is provided around the outer periphery of the first clamping opening, and the first adjusting part has a second adjusting slope that is in contact with the first adjusting slope. The second clamping assembly includes a second fixed base, a second clamp, and a second adjusting part. The second clamp is connected to the second fixed base and has a clamping channel. The second adjusting part is movably connected to the second fixed base. The end of the second clamp away from the first clamping assembly has a third adjusting slope, and the second adjusting part has a fourth adjusting slope that is in contact with the third adjusting slope. The first clamp group and the second clamp group are arranged axially spaced apart, and the first clamping jaw, the first adjusting slope, the second adjusting slope, the clamping channel, the third adjusting slope, and the fourth adjusting slope are arranged coaxially.

2. The motor shaft assembly fixture according to claim 1, characterized in that: The first adjustment part includes a first elastic element, a first pressure ring, and a first movable ring. The first fixed base has a first cavity. The first clamp is connected to the first cavity and passes through the first elastic element and the first pressure ring respectively. The first elastic element and the first pressure ring are located in the first cavity. One end of the first elastic element is connected to the first fixed base, and the other end is connected to the first pressure ring. The first movable ring is movably connected to the outer periphery of the first fixed base and is limited to the first pressure ring. The second adjustment inclined surface is disposed on the inner peripheral wall of the first pressure ring.

3. The motor shaft assembly fixture according to claim 2, characterized in that: The first pressure ring includes a main ring body and a mating part. The mating part is connected to the end of the main ring body facing the first fixed seat. The mating part protrudes radially from the main ring body and is located in the first cavity. The diameter of the mating part is larger than the inner diameter of the first movable ring, and the diameter of the main ring body is smaller than the inner diameter of the first movable ring. The main ring body extends toward the second clamping group through the first movable ring, and the first clamp passes through the main ring body and the mating part in sequence.

4. The motor shaft assembly fixture according to claim 1, characterized in that: The first chuck is provided with at least one first adjustment groove extending axially, the first adjustment groove passing through the end face of the first chuck toward the second clamping group, and the first adjustment groove is located on the outer periphery of the second adjustment slope.

5. The motor shaft assembly fixture according to claim 1, characterized in that: The first fixed base is provided with an adjustment hole extending axially, and the end of the first chuck away from the second clamp assembly is threaded to the adjustment hole.

6. The motor shaft assembly fixture according to claim 2, characterized in that: The second adjustment part includes a second elastic element, a second pressure ring, and a second movable ring. The second fixed base has a second cavity that extends through the axis. One end of the second clamp is connected to the second fixed base, and the other end extends through the second cavity in a direction away from the first clamp group. At least a portion of the second elastic element is located in the second cavity. The second pressure ring is located at the end of the second fixed base away from the first clamp group. One end of the second elastic element is connected to the second fixed base, and the other end is connected to the second pressure ring. The second elastic element is located on the outer periphery of the second clamp. The second movable ring is movably connected to the outer periphery of the second fixed base. The second movable ring is in a limiting fit with the second pressure ring. The third adjustment inclined surface is provided on the inner peripheral wall of the second pressure ring.

7. The motor shaft assembly fixture according to claim 6, characterized in that: The second pressure ring includes a pressure ring body and a connecting part. The connecting part is connected around the outer periphery of the pressure ring body at the end away from the second movable ring. The pressure ring body is provided with a clamping fit hole. The third adjusting inclined surface is the inner peripheral surface of the clamping fit hole. The clamping fit hole is coaxially arranged with the clamping channel. One end of the second elastic element is connected to the connecting part. The connecting part is limited to the second movable ring.

8. The motor shaft assembly fixture according to claim 1, characterized in that: The second chuck is provided with at least one second adjustment groove extending axially, the second adjustment groove passing through the end face of the second chuck opposite to the direction of the first clamping group, and the second adjustment groove is located at least on the outer periphery of the fourth adjustment slope.

9. The motor shaft assembly fixture according to claim 8, characterized in that: The second chuck includes a connecting plate and a chuck body. The connecting plate is connected to the end of the second fixing seat facing the first clamp group. The chuck body is connected to the connecting plate and extends in the direction away from the first clamp group. The end of the chuck body away from the first clamp group is provided with a second adjustment groove and a fourth adjustment slope. The second adjustment groove penetrates the chuck body radially. The clamping channel penetrates the connecting plate and the chuck body axially.

10. The motor shaft assembly fixture according to claim 9, characterized in that: The clamping channel includes a magnetic rod positioning channel and a second clamping opening that are connected sequentially along the axial direction. The magnetic rod positioning channel, the second clamping opening, and the first clamping opening are coaxially arranged.

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