A screw assembly mechanism of an electric motor

Abstract

The utility model relates to a screw assembly mechanism of motor belongs to motor automatic production equipment technical field, including frame table, the frame table upper end is equipped with the positioning tool seat, the positioning tool seat upper place has the motor body and motor end cover axle of pressure equipment, the positioning tool seat side is equipped with screw assembly subassembly that the motor body and motor end cover axle are carried out screwing and install. Screw assembly subassembly includes screw assembly seat, screw assembly seat front end is equipped with screw assembly pivot, screw assembly pivot with screw assembly seat interval is equipped with lift cylinder II. Solve the problem that the prior art lacks effective compression positioning, and the existing automatic assembly equipment is difficult to change and adjust in the prior art, and the efficiency of manual assembly is low, and the quality is unstable. Can realize motor end cover axle firm compression, have flexible hole site adjustment function, and can realize the efficient, high-precision motor screw assembly mechanism of synchronous feeding assembly through multi-station carousel.

Description

Technical Field

[0001] This utility model relates to the field of automated production equipment for motors, and specifically to a screw assembly mechanism for a motor. Background Technology

[0002] Micro motors (such as stepper motors and geared motors) are core drive components in automated equipment, household appliances, and precision instruments. In the motor manufacturing process, the assembly stage typically accounts for a large proportion of the total production time. Among the key steps in motor assembly is connecting and securing the motor end cover shaft to the motor body using screws.

[0003] In traditional motor screw assembly processes, individual screws were typically tightened manually using hand-held or pneumatic screwdrivers. This purely manual method has the following significant drawbacks: Poor assembly consistency: Manual operation makes it difficult to accurately control the tightening torque of screws, which can easily lead to problems such as stripped screws, loose screws (causing motor vibration and abnormal noise) or over-tightening (causing cracking of end cap plastic parts or damage to threads), seriously affecting product quality.

[0004] Low production efficiency: The manual process of manually aligning holes, removing screws, and tightening screws is tedious, and efficiency drops significantly as workers become fatigued, making it impossible to meet the needs of modern large-scale production. Summary of the Invention

[0005] This utility model primarily addresses the shortcomings of existing technologies by providing a screw assembly mechanism for motors, characterized by convenient operation, good operational stability, and strong versatility. It solves the problems of low efficiency and unstable quality in manual assembly, as well as the lack of effective clamping and positioning, and difficulties in type-change adjustment in existing automated assembly equipment.

[0006] The above-mentioned technical problems of this utility model are mainly solved by the following technical solutions: A screw assembly mechanism for an electric motor includes a frame platform. A positioning fixture is provided at the upper end of the frame platform. A pre-assembled motor body and motor end cover shaft are placed on the positioning fixture. A screw assembly assembly for screwing the motor body and motor end cover shaft is provided on the side of the positioning fixture. The screw assembly assembly includes a screw assembly base, a screw assembly rotating shaft at the front end of the screw assembly base, and a lifting cylinder II between the screw assembly rotating shaft and the screw assembly base.

[0007] Preferably, the other side of the positioning fixture is provided with a lifting limiter, which includes a lifting limit seat. The lifting limit seat is provided with a pressure plate that is lifted and pressed against the upper end of the motor end cover shaft. A lifting cylinder I is provided between the pressure plate and the lifting limit seat.

[0008] Preferably, the lower end of the screw assembly base is provided with a screw assembly bracket, a front-to-back displacement lead screw seat is provided between the screw assembly bracket and the screw assembly base, and a left-to-right displacement lead screw seat is provided between the front-to-back displacement lead screw seat and the screw assembly base. The front-to-back displacement lead screw seat is composed of a structure in which a motor drives the lead screw through a pulley. The left-to-right displacement lead screw seat adopts a structure in which a motor drives the lead screw.

[0009] Preferably, a turntable is provided between the positioning fixture and the machine frame, and a plurality of positioning fixtures are distributed in a ring on the turntable. An angle motor is provided between the turntable and the machine frame.

[0010] Preferably, the screw mounting base is equipped with a servo motor that drives the screw mounting shaft to run.

[0011] This mechanism mainly includes a machine frame, a turntable indexing system, a positioning and clamping system, and a screw locking system.

[0012] (1) Turntable indexing system, structure: including a turntable mounted on the machine frame and an angle motor that drives the turntable to rotate.

[0013] Layout: There are three positioning fixtures arranged in a ring on the turntable.

[0014] Function: The turntable is driven by an angle motor to rotate intermittently, which sequentially and cyclically delivers three tooling seats to different work areas, realizing the parallel operation of the three processes of loading, screw assembly and unloading, which significantly improves production efficiency.

[0015] (2) Positioning and bearing, structure: the positioning fixture is fixed on the turntable.

[0016] Function: Used to place and position the pre-pressed motor body and motor end cover shaft to ensure product stability during rotation and assembly.

[0017] (3) Lifting and limiting system (side pressure mechanism), location: located on one side of the positioning fixture (corresponding to the assembly station).

[0018] Structure: It consists of a lifting limit seat, a lifting cylinder I mounted on the seat, and a pressure plate that is driven by the cylinder to move up and down.

[0019] Function: Before screw assembly, lifting cylinder I drives the pressure plate to descend and press against the upper end of the motor end cover shaft. Its purpose is to counteract the torque and axial force when the screw is tightened, preventing displacement or deflection of the motor end cover shaft.

[0020] (4) Screw assembly system (three-axis linkage locking mechanism), position: located on the other side of the positioning fixture (corresponding to the assembly station), opposite to the lifting limit system.

[0021] Drive structure: Includes the screw mount and the servo motor mounted on it. The servo motor drives the screw mount shaft to rotate, providing high-precision locking torque.

[0022] Lifting structure (Z-axis): A lifting cylinder II is provided between the screw assembly shaft and the screw assembly seat, which drives the shaft to move vertically up and down. In conjunction with the shaft's extendable assembly stroke, it completes the pressing down and sucking / screwing of the screw.

[0023] Horizontal adjustment structure (X / Y axis): The screw assembly seat is supported by the screw assembly bracket. A front-to-back displacement lead screw seat is provided between the screw assembly bracket (17) and the screw assembly seat. A left-to-right displacement lead screw seat is provided between the front-to-back displacement lead screw seat and the screw assembly seat.

[0024] Function: By adjusting the left and right and front and back lead screw seats, the horizontal position of the screwdriver bit can be flexibly changed to adapt to the changes in screw hole positions of different motor models and achieve alignment.

[0025] This invention can achieve the following effects: This utility model provides a screw assembly mechanism for an electric motor. Compared with the prior art, it can achieve stable clamping of the motor end cover shaft, has flexible hole position adjustment function, and can achieve high efficiency and high precision motor screw assembly mechanism through multi-station turntable to realize synchronous feeding and assembly.

[0026] Improve assembly quality and consistency: Replace manual labor with automated mechanisms to solve the problem of inaccurate torque control when manually tightening screws, and avoid phenomena such as stripping and loose tightening.

[0027] Solving the displacement problem during assembly: To address the issue that the motor end cover shaft is prone to rotation or tilting due to torque when tightening screws, a reliable lateral clamping and limiting mechanism is provided to ensure the stability of the assembly process.

[0028] Improve the versatility and adjustability of the equipment: solve the problem that the existing equipment is difficult to adapt to the screw hole positions of different motor models, and adopt an adjustable moving mechanism to achieve quick model change and precise alignment.

[0029] Improve production efficiency: The multi-station turntable design enables parallel operation of loading, assembly, and unloading processes, reducing equipment waiting time and significantly increasing production capacity. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of this utility model.

[0031] Figure 2 This is a schematic diagram of the rear view structure of this utility model.

[0032] Figure 3 This is a top view of the structure of this utility model.

[0033] Figure 4 This is a structural schematic diagram of the screw assembly component in this utility model.

[0034] Figure 5 This is a structural schematic diagram of the screw assembly component in this utility model.

[0035] In the diagram: 1. Turntable; 2. Motor body; 3. Motor end cover shaft; 4. Lifting limiter; 5. Screw assembly assembly; 6. Frame; 7. Positioning fixture; 8. Angle motor; 9. Lifting limiter seat; 10. Lifting cylinder I; 11. Pressure plate; 12. Left and right displacement screw seat; 13. Screw assembly seat; 14. Servo motor; 15. Lifting cylinder II; 16. Front and rear displacement screw seat; 17. Screw assembly frame; 18. Screw assembly shaft. Detailed Implementation

[0036] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0037] Example: Figure 1-5 As shown, a screw assembly mechanism for an electric motor includes a frame 6. A positioning fixture 7 is provided on the upper end of the frame 6. A press-fitted motor body 2 and motor end cover shaft 3 are placed on the positioning fixture 7. A turntable 1 is provided between the positioning fixture 7 and the frame 6. Three positioning fixtures 7 are arranged in a ring on the turntable 1 for loading, assembly, and unloading. An angle motor 8 is provided between the turntable 1 and the frame 6. A screw assembly assembly 5 is provided on the side of the positioning fixture 7 for screwing the motor body 2 and motor end cover shaft 3. The screw assembly assembly 5 includes a screw assembly seat 13. A screw assembly shaft 18 is provided at the front end of the screw assembly seat 13. A servo motor 14 is provided on the screw assembly seat 13 to drive the screw assembly shaft 18. A lifting cylinder II 15 is provided between the screw assembly shaft 18 and the screw assembly seat 13. The screw assembly shaft 18 has a retractable assembly stroke. A screw assembly bracket 17 is provided at the lower end of the screw assembly base 13. A front-to-back displacement screw seat 16 is provided between the screw assembly bracket 17 and the screw assembly base 13. A left-to-right displacement screw seat 12 is provided between the front-to-back displacement screw seat 16 and the screw assembly base 13. A lifting limiter 4 is provided on the other side of the positioning fixture base 7. The lifting limiter 4 includes a lifting limit seat 9. A pressure plate 11 is provided on the lifting limit seat 9 and is in a lifting and pressing manner with the upper end of the motor end cover shaft 3. A lifting cylinder I 10 is provided between the pressure plate 11 and the lifting limit seat 9.

[0038] The working principle is as follows: Feeding: Manual or robotic arm places the press-fitted motor assembly into the positioning fixture 7 at station 1.

[0039] Indexing: Angle motor 8 drives turntable 1 to rotate 120 degrees, and sends the motor to the assembly station (station 2).

[0040] Pressing: The lifting cylinder I10 of the lifting limit device 4 is activated, and the pressure plate 11 presses the motor end cover shaft 3.

[0041] Alignment and Locking: The motor body 2 and the motor end cover shaft 3 are equipped with 4 screw holes that need to be installed. By adjusting the left and right displacement lead screw seat 12 and the front and rear displacement lead screw seat 16, the assembly shaft 18 is aligned with the screw holes; the lifting cylinder II 15 is activated, and the servo motor 14 drives the shaft to rotate, thus completing the screw tightening.

[0042] Reset and unloading: The cylinder resets, the turntable rotates 120 degrees again, and the finished product is sent to the unloading station (station 3). At the same time, the new part to be processed enters the assembly station.

[0043] In summary, the screw assembly mechanism of this motor solves the efficiency problem through multi-station parallel operation of the turntable, the assembly stability problem through lateral clamping and limiting, the versatility problem through multi-dimensional adjustment of the lead screw, and the precision control problem through servo drive, thereby realizing an efficient, high-quality, and flexible automated assembly process for motor screws.

[0044] It will be apparent to those skilled in the art that this invention is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the essential characteristics of the invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0045] In summary, the above description is only a specific embodiment of the present utility model, but the structural features of the present utility model are not limited thereto. Any changes or modifications made by those skilled in the art within the scope of the present utility model are covered by the patent scope of the present utility model.

Claims

1. A screw assembly mechanism for an electric motor, characterized in that: The machine includes a frame (6), and a positioning fixture (7) is provided on the upper end of the frame (6). The positioning fixture (7) is on which the press-fitted motor body (2) and motor end cover shaft (3) are placed. The positioning fixture (7) is provided on the side for screwing the motor body (2) and motor end cover shaft (3) with screws. The screw assembly assembly (5) includes a screw assembly seat (13), and a screw assembly rotating shaft (18) is provided at the front end of the screw assembly seat (13). A lifting cylinder II (15) is provided between the screw assembly rotating shaft (18) and the screw assembly seat (13).

2. The screw assembly mechanism for an electric motor according to claim 1, characterized in that: The positioning fixture (7) is provided with a lifting limiter (4) on the other side. The lifting limiter (4) includes a lifting limit seat (9). The lifting limit seat (9) is provided with a pressure plate (11) that is lifted and pressed against the upper end of the motor end cover shaft (3). A lifting cylinder I (10) is provided between the pressure plate (11) and the lifting limit seat (9).

3. The screw assembly mechanism for an electric motor according to claim 1, characterized in that: The screw assembly base (13) is provided with a screw assembly bracket (17) at its lower end. A front-to-back displacement screw seat (16) is provided between the screw assembly bracket (17) and the screw assembly base (13). A left-to-right displacement screw seat (12) is provided between the front-to-back displacement screw seat (16) and the screw assembly base (13).

4. The screw assembly mechanism for an electric motor according to claim 1, characterized in that: A turntable (1) is provided between the positioning fixture (7) and the machine frame (6). Several positioning fixtures (7) are arranged in a ring on the turntable (1). An angle motor (8) is provided between the turntable (1) and the machine frame (6).

5. The screw assembly mechanism for an electric motor according to claim 1, characterized in that: The screw assembly base (13) is equipped with a servo motor (14) that drives the screw assembly shaft (18) to run.

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