Press fitting detection equipment suitable for motor shaft and motor rotor

Abstract

The utility model discloses press fitting detection equipment suitable for a motor shaft and a motor rotor. A lower tool assembly comprises a lower tool cylinder seat, a rotor positioning cylinder block, a shaft limiting block and a shaft reset spring; the rotor positioning cylinder block is installed on the lower tool cylinder base and provided with a vertically-through shaft hole used for allowing a motor shaft to penetrate through. The shaft limiting block is arranged below the shaft hole, and the shaft reset spring abuts against the lower portion of the shaft limiting block. A motor rotor is placed above the rotor positioning cylinder block, and a motor shaft is placed in the shaft hole; when the upper tool assembly moves towards the lower tool assembly, the motor shaft can be pressed into the motor rotor, and the motor shaft enables the limiting block to extrude the shaft reset spring. According to the utility model, the joint force of the motor shaft and the rotor can be dynamically sensed by utilizing the synergistic effect of the shaft limiting block and the shaft reset spring, the online judgment and instant alarm of the assembly quality are realized, defective products are prevented from entering the subsequent process, and the quality control timeliness is obviously improved.

Description

Technical Field

[0001] This utility model relates to the field of motor manufacturing equipment technology, and in particular to a press-fitting and testing device suitable for motor shafts and motor rotors. Background Technology

[0002] In the field of motor manufacturing, the assembly accuracy of the motor shaft and rotor directly affects the mechanical performance and operational reliability of the motor. In traditional production processes, press fitting and joint force testing typically employ a separate operation mode: first, the motor shaft and rotor are interference-fitted using a hydraulic or mechanical press; then, the semi-finished product is transferred to an independent testing station, where specialized force measuring equipment verifies the tensile strength or torque of the mating surface. This discrete process design has significant limitations: firstly, multiple transfers of workpieces between press fitting and testing equipment extend the production cycle time and reduce equipment uptime, creating an efficiency bottleneck, especially in mass production scenarios; secondly, physical isolation between processes leads to delayed quality feedback, preventing real-time closed-loop adjustment of assembly parameters and increasing the risk of potentially defective products flowing into subsequent processes; thirdly, when facing the production needs of motors with multiple specifications, press fitting molds, positioning fixtures, and testing jigs need to be changed simultaneously, posing a risk of benchmark mismatch during the changeover process, and the parallel debugging of multiple tooling systems significantly increases downtime and labor costs. Therefore, further improvements are needed. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a press-fit testing device suitable for motor shafts and motor rotors.

[0004] The technical solution adopted by one embodiment of this utility model to solve its technical problem is: a press-fitting and testing device suitable for motor shafts and motor rotors, comprising: a base, and an upper worktable, a lower worktable, and a shaft press drive assembly disposed on the base; the upper worktable is detachably provided with an upper tooling assembly, and the lower worktable is detachably provided with a lower tooling assembly; the shaft press drive assembly is used to move the upper worktable and the lower worktable relative to each other and bring them closer together for pressing;

[0005] The lower tooling assembly includes a lower tooling cylinder seat, a rotor positioning cylinder block, a shaft limiting block, and a shaft return spring; the rotor positioning cylinder block is installed on the lower tooling cylinder seat, and the rotor positioning cylinder block is provided with a vertically penetrating shaft hole for the motor shaft to pass through; the shaft limiting block is located below the shaft hole, and the shaft return spring abuts against the lower part of the shaft limiting block;

[0006] The motor rotor is placed above the rotor positioning cylinder block, and the motor shaft is inserted into the shaft hole. When the upper tooling assembly moves towards the lower tooling assembly, the motor shaft can be pressed into the motor rotor, and the motor shaft causes the limiting block to press against the shaft return spring. If the engagement force between the motor shaft and the motor rotor is less than the design value, the shaft return spring will cause the shaft limiting block and the motor shaft to move upward.

[0007] Optionally, the lower tooling assembly is further provided with a cylinder block return spring; the cylinder block return spring is positioned below the rotor positioning cylinder block and is used to spring the cylinder block return spring upward.

[0008] Optionally, a limiting ring platform is provided on the outer periphery of the rotor positioning cylinder block; the cylinder block reset spring is sleeved on the outer periphery of the rotor positioning cylinder block, and abuts against the limiting ring platform above it; the upper side of the limiting ring platform can abut against the lower tooling cylinder seat.

[0009] Optionally, a shaft limiting post is provided below the shaft limiting block; the shaft return spring is installed between the shaft limiting post and the shaft limiting block; the shaft limiting block can abut against the shaft limiting post.

[0010] Optionally, the middle part of the shaft limiting post is provided with a spring mounting groove for arranging the shaft return spring.

[0011] Optionally, a limit clearance cavity is provided below the rotor positioning cylinder block; the shaft limit block and the shaft limit post are located inside the limit clearance cavity.

[0012] Optionally, the upper tooling assembly includes an upper extrusion block; the upper extrusion block is aligned and arranged above the rotor positioning cylinder block; the upper extrusion block is provided with a shaft ejection hole; the upper part of the motor shaft can be inserted into the shaft ejection hole.

[0013] Optionally, the upper and lower worktables are provided with mutually aligned center positioning pins; the upper and lower tooling assemblies are provided with center positioning holes that mate with the center positioning pins.

[0014] Optionally, the machine base is provided with a plurality of guide posts; the guide posts pass through the upper worktable and / or the lower worktable.

[0015] The beneficial effects of this invention are as follows: During the press-fitting process, the synergistic effect of the shaft limiting block and the shaft return spring allows for dynamic sensing of the engagement force between the motor shaft and the rotor. If the engagement force does not reach the design value, the spring rebound will directly trigger axial displacement feedback, enabling online judgment and immediate alarm of assembly quality, preventing defective products from flowing into subsequent processes, and significantly improving the timeliness of quality control. This invention integrates press-fitting and engagement force detection functions into the same equipment, simultaneously completing the press-fitting of the motor shaft and rotor while detecting and ejecting defective products, eliminating the need for workpiece transfer between independent workstations, significantly shortening the production cycle, and effectively improving production efficiency, making it particularly suitable for large-scale continuous production scenarios.

[0016] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0018] Figure 1 This is a schematic diagram of the structure of the press-fitting testing equipment of this utility model;

[0019] Figure 2 for Figure 1 Cross-sectional view of the medium-pressure testing equipment;

[0020] Figure 3 This is a schematic diagram of the upper tooling assembly and the lower tooling assembly of this utility model;

[0021] Figure 4 for Figure 3 Exploded view of the upper and lower tooling components.

[0022] Explanation of key component symbols:

[0023] 10. Machine base; 11. Guide column; 20. Upper worktable; 30. Lower worktable; 40. Shaft pressure drive assembly; 50. Upper tooling assembly; 51. Upper extrusion block; 52. Shaft ejection hole; 60. Lower tooling assembly; 61. Lower tooling cylinder seat; 62. Rotor positioning cylinder block; 621. Shaft hole; 622. Limiting ring platform; 623. Limiting clearance cavity; 63. Shaft limiting block; 64. Shaft return spring; 65. Cylinder block return spring; 66. Shaft limiting column; 661. Spring mounting slot; 70. Motor shaft; 71. Motor rotor; 80. Center positioning pin; 81. Center positioning hole. Detailed Implementation

[0024] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0025] In the description of this utility model, "multiple" means two or more; "greater than," "less than," and "exceeding" are understood to exclude the stated number; "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or their sequential relationship.

[0026] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional 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.

[0027] In this utility model, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to a fixed connection, a detachable connection, or an integral molding; they can refer to a mechanical connection; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0028] Example

[0029] Reference Figures 1 to 4 The present invention proposes a press-fit testing device suitable for motor shaft 70 and motor rotor 71, comprising: a base 10, an upper worktable 20, a lower worktable 30 and a shaft press drive assembly 40 disposed on the base 10; the upper worktable 20 is detachably provided with an upper tooling assembly 50, and the lower worktable 30 is detachably provided with a lower tooling assembly 60; the shaft press drive assembly 40 is used to move the upper worktable 20 and the lower worktable 30 relative to each other and press them together;

[0030] The lower tooling assembly 60 includes a lower tooling cylinder base 61, a rotor positioning cylinder block 62, a shaft limiting block 63, and a shaft return spring 64. The rotor positioning cylinder block 62 is installed on the lower tooling cylinder base 61 and is provided with a vertically penetrating shaft hole 621 for the motor shaft 70 to pass through. The shaft limiting block 63 is located below the shaft hole 621, and the shaft return spring 64 abuts against the lower part of the shaft limiting block 63.

[0031] The motor rotor 71 is placed above the rotor positioning cylinder block 62, and the motor shaft 70 is inserted into the shaft hole 621. When the upper tooling assembly 50 moves towards the lower tooling assembly 60, the motor shaft 70 can be pressed into the motor rotor 71, and the motor shaft 70 causes the limiting block to press the shaft return spring 64. If the engagement force between the motor shaft 70 and the motor rotor 71 is less than the design value, the shaft return spring 64 will cause the shaft limiting block 63 and the motor shaft 70 to move upward.

[0032] In this invention, during the pressing process, the synergistic action of the shaft limiting block 63 and the shaft return spring 64 dynamically senses the engagement force between the motor shaft 70 and the rotor. If the engagement force does not reach the design value, the spring rebound will directly trigger axial displacement feedback, realizing online judgment and immediate alarm of assembly quality, preventing defective products from flowing into subsequent processes, and significantly improving the timeliness of quality control. This invention integrates pressing and engagement force detection functions into the same equipment, simultaneously completing the pressing of the motor shaft 70 and the motor rotor 71, and simultaneously detecting and ejecting defective products, eliminating the transfer link between independent workstations, greatly shortening the production cycle, and effectively improving production efficiency, especially suitable for large-scale continuous production scenarios.

[0033] In this embodiment, by integrating pressing and engagement force detection functions, the traditional separate processes are integrated into a single operation, eliminating cycle time waste caused by workpiece transfer and significantly improving equipment uptime. Utilizing the mechanical linkage between the shaft limit block 63 and the shaft return spring 64, the engagement force is simultaneously detected during the pressing process: if the engagement force is insufficient, the spring rebound directly triggers the shaft to reverse displacement, achieving immediate feedback on quality issues and preventing defective products from flowing into the next process. The modular design of the upper and lower tooling lays the foundation for subsequent multi-specification compatibility.

[0034] In this embodiment, the lower tooling assembly 60 is also provided with a cylinder block return spring 65; the cylinder block return spring 65 is abutted against the lower part of the rotor positioning cylinder block 62, and is used to spring the cylinder block return spring 65 upward. The addition of the cylinder block return spring 65 enables the rotor positioning cylinder block 62 to have an automatic reset function: after pressing, the cylinder block is lifted by the spring and quickly returns to its position, reducing manual intervention and improving the efficiency of continuous operation; at the same time, the cylinder block reset and shaft reset form a dual elastic reset system, enhancing the coordination of equipment movements and providing structural support for rapid changeover.

[0035] Furthermore, a limiting ring platform 622 is provided on the outer periphery of the rotor positioning cylinder block 62; the cylinder block return spring 65 is sleeved on the outer periphery of the rotor positioning cylinder block 62, and abuts against the limiting ring platform 622 above it; the upper side of the limiting ring platform 622 can abut against the lower tooling cylinder seat 61. The design of the limiting ring platform 622 and the sleeved spring optimizes the axial movement constraint of the rotor positioning cylinder block 62: the limiting ring platform 622 and the lower tooling cylinder seat 61 form a hard limit to prevent the cylinder block from being excessively lifted; the spring is sleeved on the outer periphery of the cylinder block to avoid spring overload, ensure the elastic return accuracy in the vertical direction, and further ensure the consistency of tooling positioning after changeover.

[0036] In this embodiment, a shaft limiting post 66 is provided below the shaft limiting block 63; a shaft return spring 64 is installed between the shaft limiting post 66 and the shaft limiting block 63; the shaft limiting block 63 can abut against the shaft limiting post 66. The shaft limiting post 66 restricts the downward movement space of the shaft limiting block 63, thereby ensuring the assembly pressing position of the motor shaft 70, so that the assembly of the motor shaft 70 and the motor rotor 71 meets the design dimensions.

[0037] Specifically, the shaft limiting post 66 has a spring mounting groove 661 in the middle for arranging the shaft return spring 64. The opening of the spring mounting groove 661 enables precise positioning and prevents the shaft return spring 64 from dislodging: the groove provides radial constraint on the spring, avoiding spring displacement caused by pressure vibration and ensuring the stability of force transmission.

[0038] In this embodiment, a limiting clearance cavity 623 is provided below the rotor positioning cylinder block 62; the shaft limiting block 63 and the shaft limiting post 66 are located within the limiting clearance cavity 623. The layout design of the limiting clearance cavity 623 integrates the detection components such as the shaft limiting block 63 and the shaft limiting post 66 into a sealed space to avoid external interference; at the same time, it provides sufficient stroke space for spring compression, prevents motion interference, and ensures the reliability and repeatability of the detection action.

[0039] In this embodiment, the upper tooling assembly 50 includes an upper pressing block 51; the upper pressing block 51 is aligned and arranged above the rotor positioning cylinder block 62; the upper pressing block 51 is provided with a shaft ejection hole 52; the upper part of the motor shaft 70 can be inserted into the shaft ejection hole 52. The matching design of the upper pressing block 51 and the shaft ejection hole 52 ensures precise force application to the motor shaft 70 during the pressing process: the inner wall of the ejection hole contacts the shaft end face, dispersing the pressing stress and avoiding shaft end deformation; the depth of the ejection hole controls the pressing stroke, preventing overpressure damage to the rotor inner hole and improving the controllability of the process.

[0040] In this embodiment, the upper worktable 20 and the lower worktable 30 are provided with mutually aligned center positioning pins 80; the upper tooling assembly 50 and the lower tooling assembly 60 are provided with center positioning holes 81 that mate with the center positioning pins 80. The insertion and engagement of the center positioning pins 80 and the positioning holes enables rapid alignment of the upper and lower tooling: during changeover, it is only necessary to align the positioning holes of the tooling module with the positioning pins of the equipment to ensure the coaxiality of the press-fitting, eliminate manual adjustment errors, shorten changeover and debugging time, and improve work efficiency.

[0041] In this embodiment, the base 10 is provided with a plurality of guide columns 11; the guide columns 11 pass through the upper worktable 20 and / or the lower worktable 30. The through-type layout of the guide columns 11 enhances the vertical movement guidance of the upper and lower worktables 30: the evenly distributed structure of multiple columns effectively resists the pressure-fitting off-center load moment, ensuring no risk of overturning during the pressing process; the guide columns 11 and the worktable adopt sliding bearings or linear guides to reduce friction loss and extend the service life of the equipment.

[0042] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications and substitutions are included within the scope defined by the claims of this application.

Claims

1. A press-fitting and testing device suitable for motor shafts and motor rotors, characterized in that, include: The machine base (10) includes an upper worktable (20), a lower worktable (30), and a axial pressure drive assembly (40) disposed on the machine base (10). The upper worktable (20) is detachably provided with an upper tooling assembly (50), and the lower worktable (30) is detachably provided with a lower tooling assembly (60). The axial pressure drive assembly (40) is used to move the upper worktable (20) and the lower worktable (30) relative to each other and bring them closer together for pressing. The lower tooling assembly (60) includes a lower tooling cylinder seat (61), a rotor positioning cylinder block (62), a shaft limiting block (63), and a shaft return spring (64); the rotor positioning cylinder block (62) is installed on the lower tooling cylinder seat (61), and the rotor positioning cylinder block (62) is provided with a vertically penetrating shaft hole (621) for the motor shaft (70) to pass through; the shaft limiting block (63) is located below the shaft hole (621), and the shaft return spring (64) abuts against the lower part of the shaft limiting block (63); The motor rotor (71) is placed above the rotor positioning cylinder block (62), and the motor shaft (70) is inserted into the shaft hole (621). When the upper tooling assembly (50) moves toward the lower tooling assembly (60), the motor shaft (70) can be pressed into the motor rotor (71), and the limiting block can be squeezed by the motor shaft (70) to press the shaft return spring (64).

2. The press-fitting and testing equipment for motor shafts and motor rotors according to claim 1, characterized in that: The lower tooling assembly (60) is also provided with a cylinder block return spring (65); the cylinder block return spring (65) is abutted against the lower part of the rotor positioning cylinder block (62) and is used to bounce the cylinder block return spring (65) upward.

3. The press-fitting and testing equipment for motor shafts and motor rotors according to claim 2, characterized in that: The rotor positioning cylinder block (62) is provided with a limiting ring platform (622) on its outer periphery; the cylinder block return spring (65) is sleeved on the outer periphery of the rotor positioning cylinder block (62) and abuts against the limiting ring platform (622) above it; the upper side of the limiting ring platform (622) can abut against the lower tooling cylinder seat (61).

4. The press-fitting testing equipment for motor shafts and motor rotors according to claim 1, characterized in that: A shaft limiting post (66) is provided below the shaft limiting block (63); the shaft return spring (64) is installed between the shaft limiting post (66) and the shaft limiting block (63); the shaft limiting block (63) can abut against the shaft limiting post (66).

5. The press-fitting testing equipment for motor shafts and motor rotors according to claim 4, characterized in that: The shaft limiting post (66) has a spring mounting groove (661) in the middle for arranging the shaft return spring (64).

6. The press-fitting and testing equipment for motor shafts and motor rotors according to claim 4, characterized in that: A limiting clearance cavity (623) is provided below the rotor positioning cylinder block (62); the shaft limiting block (63) and the shaft limiting post (66) are located in the limiting clearance cavity (623).

7. The press-fitting testing equipment for motor shafts and motor rotors according to claim 1, characterized in that: The upper tooling assembly (50) includes an upper extrusion block (51); the upper extrusion block (51) is aligned and arranged above the rotor positioning cylinder block (62); the upper extrusion block (51) is provided with a shaft ejection hole (52); the upper part of the motor shaft (70) can be inserted into the shaft ejection hole (52).

8. The press-fitting testing equipment for motor shafts and motor rotors according to claim 1, characterized in that: The upper worktable (20) and the lower worktable (30) are provided with mutually aligned center positioning pins (80); the upper tooling assembly (50) and the lower tooling assembly (60) are provided with center positioning holes (81) that cooperate with the center positioning pins (80).

9. The press-fitting testing equipment for motor shafts and motor rotors according to claim 1, characterized in that: The base (10) is provided with a plurality of guide posts (11); the guide posts (11) pass through the upper worktable (20) and / or the lower worktable (30).

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