An inner snap spring mounting device for a motor output shaft

Abstract

The utility model discloses a kind of inner snap spring mounting devices of motor output shaft, comprising: rack;Mounting plate, vertically mobilely be set on rack;Lifting drive mechanism, with mounting plate drive connection;Fixing mechanism;Inner snap spring feeding mechanism;Feeding channel, be below inner snap spring feeding mechanism, its thickness is configured to allow single-layer inner snap spring pass and limit multiple-layer inner snap spring pass simultaneously;Pushing mechanism, including the pushing piece of being able to extend into feeding channel;Guide channel, with the discharge end of feeding channel intercommunication, its inner wall is big taper of small from top to bottom;Pressing mechanism, including being located in the pressing head of guide channel just above and the pressing drive mechanism of driving pressing head along guide channel axial motion, pressing head is used to be located in the inner snap spring of guide channel along guide channel downward pressure and send. Advantage is: the present scheme will inner snap spring installation from "artificial experience dependence" upgrade "precise mechanical execution", realize overall breakthrough in efficiency, accuracy, cost, security and other dimensions.

Description

Technical Field

[0001] This utility model relates to the field of automated motor assembly technology, specifically to an internal snap ring mounting device for a motor output shaft. Background Technology

[0002] In the field of motor manufacturing, the internal retaining circlip is a crucial positioning component at the end of the motor's output shaft, and its installation quality directly affects the motor's operational stability and reliability. Traditional internal retaining circlip installation primarily relies on manual operation, involving clamping the end of the internal retaining circlip with circlip pliers to retract it before inserting it into the motor's output shaft. This manual method has the following significant drawbacks:

[0003] High labor intensity and low efficiency: Manual installation requires frequent tool operation, especially in mass production, which can easily lead to operator fatigue, resulting in low installation efficiency and difficulty in meeting the cycle time requirements of automated production lines.

[0004] Unstable installation quality: Manual operation is greatly affected by subjective factors, such as hand tremors and uneven force, which may lead to improper installation or deformation of the inner retaining spring, affecting the consistency of motor performance.

[0005] High safety risk: The inner retaining spring is elastic. If it is not handled properly during manual installation, the retaining spring may pop out and injure people, posing a significant safety hazard. Utility Model Content

[0006] The purpose of this utility model is to provide an internal snap ring mounting device for a motor output shaft, so as to solve the problems of low installation efficiency, unstable quality and certain safety hazards of internal snap rings in the prior art.

[0007] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0008] An internal retaining ring mounting device for a motor output shaft, comprising:

[0009] frame;

[0010] The mounting plate is vertically movable and mounted on the frame;

[0011] A lifting drive mechanism is connected to the mounting plate and is used to drive the mounting plate to move in the vertical direction;

[0012] A fixing mechanism, provided on the frame, is used to position and fix the motor output shaft to be installed with the inner snap ring;

[0013] An internal retaining spring feeding mechanism is provided on the mounting plate and is used to accommodate multiple stacked internal retaining springs;

[0014] The feeding channel is located below the inner retaining spring feeding mechanism, and its thickness is configured to allow a single layer of inner retaining spring to pass through while restricting multiple layers of inner retaining springs from passing through simultaneously.

[0015] A pushing mechanism, located on the mounting plate, includes a pushing member that can extend into the feeding channel, used to push out a single-layer inner retaining spring in the feeding channel;

[0016] The guide channel is connected to the discharge end of the feeding channel, and its inner wall is tapered, wider at the top and narrower at the bottom.

[0017] The pressing mechanism includes a pressing head located directly above the guide channel and a pressing drive mechanism that drives the pressing head to move axially along the guide channel. The pressing head is used to press the inner retaining spring located in the guide channel downward along the guide channel, so that it contracts and deforms under the action of the inner wall of the tapered guide channel, and then snaps into the end of the motor output shaft after disengaging from the guide channel.

[0018] In the aforementioned internal retaining spring mounting device for a motor output shaft, the internal retaining spring feeding mechanism is configured to keep the stacked internal retaining springs in the same opening direction.

[0019] In the aforementioned internal retaining spring mounting device for a motor output shaft, the internal retaining spring feeding mechanism includes:

[0020] A vertically arranged guide post, with stacked inner retaining springs sleeved on the guide post;

[0021] A directional component, located on one side of the guide post and at the opening of the inner retaining spring, is used to constrain the opening direction of the stacked inner retaining springs.

[0022] In the aforementioned internal snap ring mounting device for a motor output shaft, the internal snap ring mounting device for the motor output shaft further includes:

[0023] The support mechanism includes a support plate that can move laterally and is located below the outlet end of the feeding channel, and a support drive mechanism that drives the support plate to move.

[0024] The support plate is located vertically below the pusher of the pusher mechanism, and is used to receive the inner retaining spring pushed out by the pusher mechanism and make it smoothly enter the guide channel.

[0025] In the aforementioned internal retaining ring mounting device for a motor output shaft, the support plate is located at the entrance of the guide channel.

[0026] In the aforementioned internal retaining ring mounting device for a motor output shaft, the fixing mechanism includes: a fixing groove adapted to the motor housing; and / or, a limiting part inserted into the inside of the motor output shaft.

[0027] In the aforementioned internal snap ring mounting device for a motor output shaft, the pushing mechanism includes a pushing cylinder fixed on the mounting plate, and the piston of the pushing cylinder is connected to a pushing component that extends into the feeding channel.

[0028] In the aforementioned internal retaining spring mounting device for a motor output shaft, the inner wall of the guide channel is a continuously contracting conical surface or a stepped diameter-reducing surface, so that the inner retaining spring is forced to reduce its inner diameter when pressed down.

[0029] In the aforementioned internal retaining ring mounting device for a motor output shaft, the thickness of the feeding channel ranges from 1.1 to 1.8 times the thickness of a single-layer internal retaining ring.

[0030] In the aforementioned internal snap ring mounting device for a motor output shaft, a vertical guide rod is provided on the frame, and the mounting plate is slidably mounted on the vertical guide rod.

[0031] Compared with the prior art, the advantages of this utility model are:

[0032] By cooperating with a lifting drive mechanism and a vertically movable mounting plate, core components such as the guide channel and pressing mechanism on the mounting plate can move up and down with the mounting plate, thereby adjusting the position of the guide channel according to the different heights of the motor output shaft. This eliminates the need to design multiple sets of fixed fixtures for motor shafts of different heights; adaptive height adjustment can meet diverse product needs, reducing equipment procurement and maintenance costs for enterprises. It also avoids misalignment of the internal retaining spring pressing position due to differences in motor shaft height, ensuring that the internal retaining spring accurately falls into the retaining groove at the end of the motor shaft, improving the installation qualification rate.

[0033] The internal retaining spring feeding mechanism can accommodate multiple stacked internal retaining springs. A feeding channel restricts the passage of single-layer internal retaining springs, and a pushing mechanism sequentially pushes out the single-layer internal retaining springs, achieving continuous feeding and avoiding the time-consuming manual handling of each piece. This automated process reduces manual intervention, making it particularly suitable for mass production, significantly improving installation efficiency and meeting the cycle time requirements of automated production lines.

[0034] The inner wall of the guide channel is tapered, wider at the top and narrower at the bottom. When the pressing head presses the inner retaining spring axially along the guide channel, the tapered inner wall forces the inner retaining spring to contract and deform, then detaches and directly engages with the motor output shaft end. This process eliminates the need for manual operation with retaining spring pliers, achieving automatic contraction and pressing of the inner retaining spring through a mechanical structure, further shortening the installation time per station. The fully automated operation eliminates the need for manual contact with the inner retaining spring, avoiding the risk of injury due to its elastic ejection, and meeting industrial production safety requirements. Through core advantages such as automated process design, precise mechanical positioning, adaptive height adjustment, and safety protection, it systematically solves the problems of low efficiency, unstable quality, and safety hazards associated with traditional manual installation, demonstrating significant industrial application value.

[0035] Furthermore, the inner retaining spring feeding mechanism is configured to ensure that the stacked inner retaining springs maintain a consistent opening direction. The opening direction of the inner retaining spring directly affects the accuracy of its insertion into the motor output shaft slot after shrinkage and deformation. If the opening directions of the stacked inner retaining springs are inconsistent, the retaining springs may fail to shrink properly or may be misaligned during press-fitting. By forcibly constraining the opening direction through the feeding mechanism, it ensures that the opening direction of each pushed inner retaining spring is consistent, avoiding installation failures due to directional confusion and significantly improving the success rate of single-shot installation.

[0036] Furthermore, the inner retaining spring feeding mechanism includes: a vertically arranged guide post, on which stacked inner retaining springs are sleeved; and a directional member, located on one side of the guide post and at the opening of the inner retaining spring, used to constrain the opening direction of the stacked inner retaining springs. The vertically arranged guide post provides axial support for the inner retaining springs. The stacked inner retaining springs, sleeved on the guide post, ensure that the multiple retaining springs are coaxially stacked in the vertical direction through the cooperation between the post and the inner hole of the inner retaining spring, avoiding tilting or offset during stacking, and laying the foundation for the uniformity of the opening direction. The directional member, located on one side of the guide post and at the opening of the inner retaining spring, acts directly on both ends of the retaining spring opening through mechanical limiting, forcibly limiting the opening direction.

[0037] Furthermore, the internal retaining spring mounting device for the motor output shaft also includes: a support mechanism, comprising a support plate that can move laterally and is located below the outlet end of the feeding channel, and a support drive mechanism for driving the support plate; wherein, the support plate is located vertically below the pusher of the pushing mechanism, and is used to receive the internal retaining spring pushed out by the pushing mechanism and allow it to smoothly enter the guide channel. When the pushing mechanism pushes the internal retaining spring out of the feeding channel, the support plate can promptly receive the internal retaining spring, preventing it from falling freely due to gravity and causing posture deviation or collision with the entrance of the guide channel, ensuring that the internal retaining spring enters the guide channel in a horizontal and stable state, thus improving installation accuracy.

[0038] Furthermore, the support plate is located at the entrance of the guide channel. With the support plate directly positioned at the entrance of the guide channel, the transmission path of the inner retaining spring from the support plate to the guide channel is extremely short, avoiding the risk of posture deviation or falling due to excessive transmission distance. The inner retaining spring does not require additional lateral movement and can directly enter the guide channel under the action of the pressing head, ensuring that its central axis is highly aligned with the axis of the guide channel, thus improving the accuracy of the initial pressing position.

[0039] Furthermore, the fixing mechanism includes: a fixing groove adapted to the motor housing; and / or, a limiting part inserted into the motor output shaft. The fixing groove adapted to the motor housing achieves overall positioning of the motor through mechanical contour matching, restricts the translation and rotation of the motor in the horizontal direction, and ensures that the output shaft axis is aligned with the guide channel axis in the horizontal plane, providing a stable reference for the internal snap ring press-fit; the limiting part inserted into the motor output shaft (such as a positioning pin, spindle, etc.) further constrains the axial and radial displacement of the output shaft by cooperating with the inner hole of the shaft, which is especially suitable for motors with hollow shaft structures, avoiding shaking during press-fit due to the shaft end being suspended, and ensuring that the internal snap ring slot is precisely aligned with the guide channel outlet.

[0040] Furthermore, the pushing mechanism includes a pushing cylinder fixed to the mounting plate, and the piston of the pushing cylinder is connected to a pushing component that extends into the feeding channel. The pushing cylinder can precisely control the pushing force by adjusting the air pressure, ensuring sufficient force to push the inner retaining spring out of the feeding channel while avoiding deformation of the inner retaining spring or damage to the pushing component due to excessive force. Stable pushing force output ensures consistent pushing action each time, improving the reliability of the feeding process. The high precision of the cylinder piston's linear motion trajectory ensures that the pushing component smoothly pushes the inner retaining spring along the axis of the feeding channel, preventing the retaining spring from getting stuck in the channel due to movement deviation, and ensuring that the single-layer inner retaining spring accurately enters the supporting mechanism or guide channel.

[0041] Furthermore, the inner wall of the guide channel is a continuously contracting conical surface or a stepped diameter-reducing surface, forcing the inner retaining spring to shrink its inner diameter when pressed down. Through smooth and continuous taper changes, the inner retaining spring experiences a uniform radial contraction force during press-fitting, gradually reducing its inner diameter to match the size of the motor output shaft groove. This avoids localized stress concentration or excessive deformation of the retaining spring caused by abrupt contraction. The multi-stage stepped inner diameter contraction forces the inner retaining spring to deform in stages, which is particularly suitable for inner retaining springs with thicker walls or greater elasticity. By applying contraction force step by step, the resistance to single deformation is reduced, ensuring the retaining spring passes smoothly through the guide channel and accurately adapts to the shaft end size.

[0042] Furthermore, the thickness of the feeding channel ranges from 1.1 to 1.8 times the thickness of a single-layer inner retaining spring. The feeding channel thickness is strictly limited to 1.1 to 1.8 times the thickness of a single-layer inner retaining spring. This mechanical dimensional constraint ensures that only a single-layer inner retaining spring can pass through the channel, fundamentally preventing multiple retaining springs from simultaneously entering the pushing and pressing stages. If the channel thickness is too large, it may allow two layers of retaining springs to stack and pass through, causing them to fail to engage with the shaft end retaining groove during pressing due to the total thickness exceeding the limit. If the channel thickness is too small, machining errors or retaining spring tolerances may prevent a single-layer retaining spring from passing through, affecting feeding efficiency.

[0043] Furthermore, the frame is provided with a vertical guide rod, and the mounting plate is slidably mounted on the vertical guide rod. The vertical guide rod provides rigid guidance for the mounting plate, limiting its lateral displacement or swaying during lifting and lowering, ensuring that the core components on the mounting plate, such as the guide channel and pressing mechanism, always move in the vertical direction and maintain coaxiality with the motor output shaft axis, thus avoiding displacement of the inner retaining spring pressing position due to deviation in the movement trajectory. Attached Figure Description

[0044] Figure 1 This is a perspective view of the internal retaining spring mounting device for the output shaft of a motor according to this utility model during installation.

[0045] Figure 2 This is a partial sectional view of an internal snap ring mounting device for a motor output shaft according to the present invention.

[0046] Figure 3 This is a perspective view of an internal snap ring mounting device for a motor output shaft according to the present invention.

[0047] Figure 4 This is a structural diagram of the present invention at the initial installation position;

[0048] Figure 5 This is a schematic diagram of the structure of this utility model when the inner retaining spring is pushed into the guide channel;

[0049] Figure 6 This is a schematic diagram of the structure of the present invention when the inner retaining spring is pushed out of the guide channel;

[0050] Figure 7 This is a perspective view of the motor output shaft in this utility model.

[0051] The attached figures are labeled as follows:

[0052] Frame 100, mounting plate 110, lifting drive mechanism 120, vertical guide rod 130, bracket 140, fixing plate 150;

[0053] Fixing mechanism 200, fixing groove 210, limiting part 220;

[0054] Internal snap ring feeding mechanism 300, guide column 310, directional component 320;

[0055] Feeding channel 400;

[0056] Pushing mechanism 500, pushing component 510, pushing cylinder 520;

[0057] Guide channel 600;

[0058] Pressing mechanism 700, pressing head 710, pressing drive mechanism 720;

[0059] Support mechanism 800, support plate 810, support drive mechanism 820;

[0060] Motor output shaft 900, internal retaining ring 910. Detailed Implementation

[0061] An internal retaining ring mounting device for a motor output shaft, comprising:

[0062] 100 racks;

[0063] Mounting plate 110 is vertically movable and mounted on the frame 100;

[0064] The lifting drive mechanism 120 is drivenly connected to the mounting plate 110 and is used to drive the mounting plate 110 to move in the vertical direction;

[0065] A fixing mechanism 200 is provided on the frame 100 and is used to position and fix the motor output shaft 900 to which the inner snap ring 910 is to be installed.

[0066] An inner retaining spring 910 feeding mechanism 300 is provided on the mounting plate 110 and is used to accommodate multiple stacked inner retaining springs 910;

[0067] The feeding channel 400 is located below the feeding mechanism 300 of the inner retaining spring 910, and its thickness is configured to allow a single layer of inner retaining spring 910 to pass through while restricting multiple layers of inner retaining spring 910 from passing through simultaneously.

[0068] The pushing mechanism 500 is provided on the mounting plate 110 and includes a pushing member 510 that can extend into the feeding channel 400, used to push out the single-layer inner retaining spring 910 in the feeding channel 400.

[0069] The guide channel 600 is connected to the discharge end of the feeding channel 400, and its inner wall is a cone shape that is larger at the top and smaller at the bottom.

[0070] The pressing mechanism 700 includes a pressing head 710 located directly above the guide channel 600 and a pressing drive mechanism 720 that drives the pressing head 710 to move axially along the guide channel 600. The pressing head 710 is used to press the inner retaining spring 910 located in the guide channel 600 downward along the guide channel 600, so that it contracts and deforms under the action of the inner wall of the tapered guide channel, and after disengaging from the guide channel 600, it is inserted into the end of the motor output shaft 900.

[0071] By cooperating with the lifting drive mechanism 120 and the vertically movable mounting plate 110, core components such as the guide channel 600 and the pressing mechanism 700 on the mounting plate 110 can move up and down with the mounting plate 110, thereby adjusting the position of the guide channel 600 according to the different heights of the motor output shaft 900. This eliminates the need to design multiple sets of fixed fixtures for motor shafts of different heights; height adaptive adjustment can meet diverse product needs, reducing equipment procurement and maintenance costs for enterprises. It also avoids misalignment of the inner retaining spring 910 due to differences in motor shaft height, ensuring that the inner retaining spring 910 accurately falls into the groove at the end of the motor shaft, improving the installation qualification rate.

[0072] The inner retaining spring 910 feeding mechanism 300 can accommodate multiple stacked inner retaining springs 910. The feeding channel 400 restricts the passage of a single layer of inner retaining springs 910, and the pushing mechanism 500 pushes out the single-layer inner retaining springs 910 sequentially, achieving continuous feeding and avoiding the time-consuming manual handling of each piece. This automated process reduces manual intervention, making it particularly suitable for mass production, significantly improving installation efficiency and meeting the cycle time requirements of automated production lines.

[0073] The inner wall of the guide channel 600 is tapered, wider at the top and narrower at the bottom. When the pressing head 710 presses the inner retaining spring 910 axially along the guide channel 600, the tapered inner wall forces the inner retaining spring 910 to contract and deform, then directly engages with the end of the motor output shaft 900 after disengaging. This process eliminates the need for manual operation with retaining spring pliers, achieving automatic contraction and pressing of the inner retaining spring 910 through a mechanical structure, further shortening the installation time per station. The fully automated operation eliminates the need for manual contact with the inner retaining spring 910, avoiding the risk of injury due to its elastic ejection, and meeting industrial production safety requirements. Through its core advantages such as automated process design, precise mechanical positioning, adaptive height adjustment, and safety protection, it systematically solves the problems of low efficiency, unstable quality, and safety hazards associated with traditional manual installation, demonstrating significant industrial application value.

[0074] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0075] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship 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.

[0076] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0077] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., 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, an electrical connection, or a connection that allows communication between them; 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 limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0078] See Figures 1 to 7 This is an embodiment of an internal snap ring mounting device for a motor output shaft according to the present invention. The internal snap ring mounting device for a motor output shaft includes a frame 100, a mounting plate 110, a lifting drive mechanism 120, a fixing mechanism 200, an internal snap ring 910 feeding mechanism 300, a pushing mechanism 500, a guide channel 600, and a pressing mechanism 700.

[0079] The frame 100 primarily serves a supporting and fixing function, ensuring the position of each component and providing support for its normal operation. The frame 100 includes a vertical support 140 and a horizontal fixing plate 150. A fixing mechanism 200 is fixed to the fixing plate 150. The fixing mechanism 200 is mainly used to fix and position the motor output shaft 900, ensuring that the motor output shaft 900 is in the accurate position and that the end of the motor output shaft 900 to which the inner retaining spring 910 is installed faces vertically upwards.

[0080] A lifting drive mechanism 120 is mounted on a vertical bracket 140, which drives the mounting plate 110 to move vertically. The lifting drive mechanism 120 can use a cylinder, hydraulic cylinder, or linear motor to drive the vertical movement of the mounting plate 110. The mounting plate 110 primarily provides mounting and positioning for the inner retaining spring 910 feeding mechanism 300, pushing mechanism 500, guide channel 600, and pressing mechanism 700, and drives these components to move vertically together. The drive end of the lifting drive mechanism 120 is fixedly connected to the mounting plate 110, thereby achieving the purpose of driving the mounting plate 110 to move. Through the cooperation of the lifting drive mechanism 120 and the vertically movable mounting plate 110, the core components on the mounting plate 110, such as the guide channel 600 and pressing mechanism 700, can move up and down with the mounting plate 110, thereby adjusting the position of the guide channel 600 according to the different heights of the motor output shaft 900. There's no need to design multiple sets of fixed fixtures for motor shafts of different heights; the height-adaptive adjustment can meet diverse product needs, reducing equipment procurement and maintenance costs for enterprises. It also avoids misalignment of the inner retaining spring 910 due to differences in motor shaft height, ensuring the inner retaining spring 910 accurately falls into the retaining groove at the end of the motor shaft, thus improving the installation success rate.

[0081] The inner retaining spring 910 feeding mechanism 300 is mounted on the mounting plate 110. Its main function is to fix the inner retaining spring 910 to be installed and to set multiple stacked states of the inner retaining spring 910, that is, stacked in the vertical direction. The feeding channel 400 is located below the inner retaining spring 910 feeding structure. Its thickness is greater than the thickness of one inner retaining spring 910 but less than the thickness of two inner retaining springs 910, that is, the feeding channel 400 allows only one inner retaining spring 910 to pass through at a time. The feeding channel 400 can be formed by cutting a groove in a fixed component or by splicing two or more components. The inner retaining spring 910 feeding mechanism 300 is connected to the feed port at the feeding end of the feeding channel 400. The inner retaining spring 910 located in the inner retaining spring 910 feeding mechanism 300 can fall into the feeding channel 400 under its own gravity. The inner retaining spring 910 feeding mechanism 300 can accommodate multiple stacked inner retaining springs 910. The feeding channel 400 restricts the passage of a single layer of inner retaining springs 910, and the pushing mechanism 500 pushes out the single-layer inner retaining springs 910 sequentially, achieving continuous feeding and avoiding the time-consuming manual handling of each piece. This automated process reduces manual intervention, making it particularly suitable for mass production, significantly improving installation efficiency and meeting the cycle time requirements of automated production lines.

[0082] Of course, in order to allow the inner retaining spring 910 to move to the discharge end within the feeding channel 400, a pushing mechanism 500 is also provided on the mounting plate 110, including a pushing member 510 that can extend into the feeding channel 400. The pushing member 510 pushes the inner retaining spring 910 from the feeding end to the discharge end within the feeding channel 400. A guide channel 600 is connected to the discharge end of the feeding channel 400. After the inner retaining spring 910 leaves the feeding channel 400, it will fall into the guide channel 600. The inner wall of the guide channel 600 has a tapered structure that is larger at the top and smaller at the bottom. The guide channel 600 can be formed by drilling a hole in a single component or by splicing multiple components. Its purpose is to allow the inner retaining spring 910 to gradually tighten as it falls along the guide channel 600, so that it can enter the end of the motor output shaft 900.

[0083] The inner retaining spring 910 cannot pass through the guide channel 600 by its own weight alone. Therefore, a pressing mechanism 700 mounted on the mounting plate 110 is required. The main function of the pressing mechanism 700 is to allow the inner retaining spring 910 to pass through the guide channel 600. The pressing mechanism 700 includes a pressing head 710 located directly above the guide channel 600 and a pressing drive mechanism 720 that drives the pressing head 710 to move axially along the guide channel 600. The pressing head 710 is used to press the inner retaining spring 910 located in the guide channel 600 downward along the guide channel 600, causing it to contract and deform under the action of the inner wall of the tapered guide channel, and then snap into the end of the motor output shaft 900 after detaching from the guide channel 600. The inner wall of the guide channel 600 is tapered, wider at the top and narrower at the bottom. When the pressing head 710 presses the inner retaining spring 910 axially along the guide channel 600, the inner wall of the tapered guide channel forces the inner retaining spring 910 to contract and deform, and after detaching, it directly snaps into the end of the motor output shaft 900. This process eliminates the need for manual operation with snap ring pliers, automatically retracting and pressing the inner snap ring 910 through a mechanical structure, further reducing installation time per workstation. The fully automated operation eliminates the need for manual contact with the inner snap ring 910, avoiding the risk of injury due to its elastic ejection and meeting industrial production safety requirements. Through its core advantages such as automated process design, precise mechanical positioning, adaptive height adjustment, and safety protection, it systematically solves the problems of low efficiency, inconsistent quality, and safety hazards associated with traditional manual installation, demonstrating significant industrial application value.

[0084] like Figure 3As shown, based on the above embodiment, the feeding mechanism 300 for the inner retaining spring 910 is configured to ensure that the stacked inner retaining springs 910 maintain a consistent opening direction. The opening direction of the inner retaining spring 910 directly affects the accuracy of its insertion into the slot of the motor output shaft 900 after shrinkage and deformation. If the opening directions of the stacked inner retaining springs 910 are inconsistent, the retaining springs may not shrink properly or may shift in position during pressing. By forcibly constraining the opening direction through the feeding mechanism, it is ensured that the opening direction of the inner retaining springs 910 pushed each time is consistent, avoiding installation failures due to direction confusion and significantly improving the success rate of single installation. After the opening direction is unified, the guide channel 600 and the pressing head 710 do not need to be adapted to retaining springs with different directions, making the mechanical structure design simpler, the pressing path more accurate, and reducing the additional debugging costs caused by direction uncertainty. In traditional manual installation or semi-automatic equipment, it is often necessary to manually sort the opening directions of the inner retaining springs 910 in advance, which is time-consuming and prone to errors. The orientation function of the feeding mechanism automatically unifies the opening direction, completely eliminating the need for manual pre-sorting, further improving the automation level of the entire installation process and reducing labor costs.

[0085] Specifically, to achieve the above-mentioned functions of the inner retaining spring 910 feeding mechanism 300, this embodiment adopts the following: the inner retaining spring 910 feeding mechanism 300 includes a guide post 310 and a directional member 320. The guide post 310 is vertically arranged, and the stacked inner retaining springs 910 are sleeved on the guide post 310. The directional member 320 is arranged on one side of the guide post 310, and the directional member 320 is located at the opening of the inner retaining spring 910. That is, the width of the directional member 320 is slightly smaller than the width of the opening of the inner retaining spring 910. The directional member 320 should ensure that the openings of all the inner retaining springs 910 face the same direction, and should not obstruct the inner retaining springs 910 from falling along the guide post 310. The inner retaining spring 910 feeding mechanism 300 can also adopt a vertically arranged cylinder with open ends. The inner retaining springs 910 are stacked inside the cylinder. The inner diameter of the cylinder is slightly larger than the outer diameter of the inner retaining springs 910 in their natural state. A directional member 320 is provided on the inner wall of the cylinder at the opening of the inner retaining springs 910 to ensure that the opening direction of all the inner retaining springs 910 is consistent. In this embodiment, the inner retaining spring 910 feeding mechanism 300 with guide posts 310 is preferred. The structure of the guide posts 310 allows the operator to intuitively see the remaining status of the inner retaining springs 910, so as to replenish the inner retaining springs 910 in a timely manner. The vertically arranged guide posts 310 provide axial support for the inner retaining springs 910. The stacked inner retaining springs 910 are sleeved on the guide posts 310. Through the cooperation between the post and the inner hole of the inner retaining spring 910, it is ensured that the multiple retaining springs are coaxially stacked in the vertical direction, avoiding tilting or offset during stacking, and laying the foundation for the uniformity of the opening direction. The directional component 320 is positioned on one side of the guide post 310 and at the opening of the inner retaining spring 910. It acts directly on both sides of the retaining spring opening through mechanical limiting, forcibly defining the opening direction. This structure utilizes physical contact constraint, eliminating the need for complex sensors or control systems, resulting in low cost and high reliability, and stably achieving a uniform opening direction. When the inner retaining spring 910 is stacked on the guide post 310, it naturally falls to the bottom layer under gravity, with the directional component 320 simultaneously constraining its opening direction. After the bottom retaining spring is pushed out by the pushing mechanism 500, the upper retaining springs fall sequentially to replenish it. No manual intervention is required throughout the process, ensuring continuous and stable feeding and preventing feeding interruptions caused by disordered retaining spring stacking. The vertical guiding effect of the guide post 310 reduces lateral swaying of the retaining spring during stacking. The directional component 320 only applies local constraint at the opening, without generating additional resistance to the axial movement of the retaining spring, thereby reducing the risk of jamming or stuck retaining springs within the feeding mechanism and improving feeding efficiency.

[0086] Based on the above embodiments, the fixing mechanism 200 includes a fixing groove 210 adapted to the motor housing and a limiting part 220 inserted into the motor output shaft 900. The fixing mechanism 200 is mainly designed for the overall structure of the motor output shaft 900, and may only have the fixing groove 210 or only the limiting part 220. The fixing groove 210 adapted to the motor housing achieves the initial positioning of the motor as a whole through mechanical contour matching, restricts the translation and rotation of the motor in the horizontal direction, and ensures that the axis of the output shaft is aligned with the axis of the guide channel 600 in the horizontal plane, providing a stable reference for the press-fitting of the inner retaining spring 910. The limiting part 220 inserted into the motor output shaft 900 (such as a positioning pin, spindle, etc.) further restricts the axial and radial displacement of the output shaft by cooperating with the inner hole of the shaft, which is especially suitable for motors with hollow shaft structures, avoiding shaking during press-fitting caused by the shaft end being suspended, and ensuring that the retaining spring 910 slot is precisely aligned with the outlet of the guide channel 600.

[0087] Based on the above embodiments, the unloading mechanism includes a pusher cylinder 520 fixed on the mounting plate 110. The piston of the pusher cylinder 520 is connected to a pusher component 510 that extends into the feeding channel 400. In this embodiment, the pusher component 510 is plate-shaped to generate a stable pushing force on the inner retaining spring 910, preventing the pusher component 510 from getting stuck between the inner retaining spring 910 and the inner wall of the feeding channel 400. The pusher cylinder 520 can precisely control the pushing force by adjusting the air pressure, ensuring that the pushing force is sufficient to push the inner retaining spring 910 out of the feeding channel while avoiding deformation of the inner retaining spring 910 or damage to the pusher component 510 due to excessive pushing force. Stable pushing force output ensures consistent pushing action each time, improving the reliability of the feeding process. The high precision of the linear motion trajectory of the cylinder piston ensures that the pusher 510 smoothly pushes the inner retaining spring 910 along the axis of the feeding channel 400, preventing the retaining spring from getting stuck in the channel due to movement deviation. This ensures that the single-layer inner retaining spring 910 accurately enters the supporting mechanism 800 or the guide channel 600. The cylinder's start-stop response time is short (typically in milliseconds), meeting the high-frequency pushing requirements of automated production lines. For example, in continuous feeding scenarios, the pusher cylinder 520 can quickly complete the "push-return" cycle, working synchronously with the lifting drive mechanism 120, pressing mechanism 700, etc., to maintain the efficient operation of the production line.

[0088] Based on the above embodiments, the inner wall of the guide channel 600 is a continuously contracting conical surface or a stepped diameter-reducing surface, which forces the inner retaining spring 910 to reduce its inner diameter when pressed down. Continuous conical surface: Through smooth and continuous taper changes, the inner retaining spring 910 is subjected to a uniform radial contraction force during press-fitting, and its inner diameter gradually decreases to match the size of the slot in the motor output shaft 900, avoiding local stress concentration or excessive deformation of the retaining spring due to abrupt contraction. Stepped diameter-reducing surface: Through multi-stage stepped inner diameter contraction, the inner retaining spring 910 is forced to deform in stages, which is especially suitable for inner retaining springs 910 with thicker walls or greater elasticity. By applying contraction force step by step, the resistance to single deformation is reduced, ensuring that the retaining spring passes smoothly through the guide channel 600 and accurately matches the shaft end size. When manually contracting the inner retaining spring 910 using retaining spring pliers, the force and contraction amplitude are difficult to control precisely, easily leading to loosening or breakage of the retaining spring after installation. The structured shrinkage design of the guide channel 600 achieves standardized deformation through mechanical constraints, ensuring consistent shrinkage of each retaining spring and improving the stability of installation quality. The continuous or stepped shrinkage structure ensures uniform circumferential force on the inner retaining spring 910, avoiding problems such as retaining spring opening deformation and spring body cracking caused by excessive localized force in traditional manual operations. This ensures the retaining spring maintains good elasticity after pressing, extending its service life in the motor. Through the structured inner wall shrinkage design, the deformation process of the inner retaining spring 910 is transformed from "manual experience control" to "precise mechanical constraint," creating independent advantages in installation adaptability, process smoothness, and retaining spring protection. This design not only solves the precision deficiencies of traditional manual operations but also enhances the equipment's adaptability to diverse retaining spring specifications through adjustable structural parameters, representing a key technical detail for achieving high precision and high reliability in automated pressing.

[0089] Based on the above embodiments, the thickness range of the feeding channel 400 is 1.1 to 1.8 times the thickness of a single-layer inner retaining spring 910. The thickness of the feeding channel 400 is strictly limited to 1.1 to 1.8 times the thickness of a single-layer inner retaining spring 910. This mechanical dimensional constraint ensures that only a single-layer inner retaining spring 910 can pass through the channel, fundamentally preventing multiple retaining springs from simultaneously entering the pushing and pressing stages. If the channel thickness is too large, it may allow two layers of retaining springs to stack and pass through, causing them to fail to engage with the shaft end slot during pressing due to the total thickness exceeding the limit. If it is too small, a single-layer retaining spring may not be able to pass through due to machining errors or retaining spring tolerances, affecting the feeding efficiency. A margin of 0.1 to 0.8 times the single-layer thickness is reserved to accommodate the manufacturing tolerances of the inner retaining spring 910, ensuring that retaining springs from different batches can pass smoothly through the feeding channel 400, avoiding jamming or blockage caused by a rigid match between the channel size and the actual thickness of the retaining spring, and maintaining a smooth feeding process. A reasonable channel gap (slightly larger than the thickness of a single layer) can both limit the multi-layer retaining rings and reduce the frictional resistance between the single-layer retaining rings and the inner wall of the channel. The pushing mechanism 500 can complete the pushing action without overcoming excessive resistance, reducing the wear risk of the pushing component 510 and extending the service life of the equipment.

[0090] Since the mounting plate 110 needs to move up and down frequently with the inner yellow feeding mechanism and the pushing mechanism 500, in order to ensure the smooth operation of the mounting plate 110 and avoid deviation between the outlet of the guide channel 600 and the motor output shaft 900 below, two vertical guide rods 130 are provided on the bracket 140 of the frame 100. The mounting plate 110 is slidably mounted on the vertical guide rods 130. Alternatively, a slide rail and slider can be used, with the slide rail vertically mounted on the bracket 140 and the slider fixed on the mounting plate 110. The vertical guide rods 130 provide rigid guidance for the mounting plate 110, limiting its lateral displacement or swaying during lifting and lowering. This ensures that the core components on the mounting plate 110, such as the guide channel 600 and the pressing mechanism 700, always move vertically and remain coaxial with the axis of the motor output shaft 900, preventing the inner retaining spring 910 from shifting due to deviation in the movement trajectory. Mounting plate 110 can slide up and down along frame 100 via vertical guide rod 130, and its height can be infinitely adjusted in conjunction with lifting drive mechanism 120 (such as motor or cylinder). When producing different models of motors, there is no need to replace frame 100 or redesign fixed tooling; only the height of mounting plate 110 needs to be adjusted to match output shafts of different heights, significantly reducing the equipment modification costs for enterprises to cope with diversified products.

[0091] When the pushing mechanism 500 pushes the inner retaining spring 910 to the discharge end of the feeding channel 400, the inner retaining spring 910 is prone to deflection when it falls into the guide channel 600, causing the inner retaining spring 910 to not be in a relatively horizontal position when the pressing head 710 presses down and get stuck in the guide channel 600. Therefore, the internal retaining spring mounting device for the motor output shaft also includes: a support mechanism 800, which includes a support plate 810 that is laterally movable and located below the outlet end of the feeding channel 400, and a support drive mechanism 820 that drives the support plate 810 to move. The support plate 810 is located vertically below the pusher 510 of the pusher mechanism 500, and is used to receive the internal retaining spring 910 pushed out by the pusher mechanism 500 and smoothly enter the guide channel 600. The support drive mechanism 820 can be a cylinder or a linear motor. After the pusher mechanism 500 pushes the internal retaining spring 910 to the outlet end of the feeding channel 400, the internal retaining spring 910 will fall on the support plate 810. The laterally moving channel only allows the support plate 810 to move; the channel height does not allow the internal retaining spring 910 to move. As the support plate 810 is retracted by the support drive mechanism 820, the inner retaining spring 910 separates from the support plate 810 and falls into the guide channel 600 due to the channel height limitation. Supported by the support plate 810, the inner retaining spring 910 does not fall directly from the loading channel 400 into the guide channel 600, but rather from the loading channel 400 onto the support plate 810, and then from the support plate 810 into the guide channel 600. The vertical distance of the inner retaining spring 910 from the support plate 810 into the guide channel 600 is less than the distance from the loading channel 400 directly into the guide channel 600. This reduces the probability of the inner retaining spring 910 getting stuck in the guide channel 600, ensuring that the inner retaining spring 910 enters the guide channel 600 in a horizontal and stable state, thus improving installation accuracy.

[0092] Furthermore, the support plate 810 is located at the entrance of the guide channel 600, and the transmission path of the inner retaining spring 910 from the support plate 810 to the guide channel 600 is extremely short (almost zero-gap connection), avoiding the risk of posture deviation or falling due to excessive transmission distance. The inner retaining spring 910 does not need to undergo additional lateral movement and can directly enter the guide channel 600 under the action of the pressing head 710, ensuring that its central axis is highly aligned with the axis of the guide channel 600, improving the accuracy of the initial pressing position.

[0093] Installation procedure for the inner retaining spring 910: First, fix the motor output shaft 900 on the fixing mechanism 200, ensuring that the part of the motor output shaft 900 where the inner retaining spring 910 needs to be installed is directly below the guide channel 600. Then, activate the upper and lower cylinders to move the mounting plate 110 downwards. Figure 4As shown, simultaneously, the pushing cylinder 520 drives the pushing component 510 to move, and the pushing component 510 pushes the inner retaining spring 910, the lowest layer of the inner retaining spring 910 in the feeding mechanism 300, into the feeding channel 400; as Figure 5 As shown, when the inner retaining spring 910 reaches the outlet end of the feeding channel 400, that is, when it is located above the guide channel 600, the inner retaining spring 910 falls out of the feeding channel 400 under the influence of gravity and is received by the support plate 810. The pusher 510 is retracted to the initial position under the action of the pusher cylinder 520, ready for the next push; as Figure 6 As shown, after the inner retaining spring 910 is fully positioned on the support plate 810, the support drive mechanism 820 is activated, causing the support plate 810 to retract and allowing the inner retaining spring 910 to smoothly enter the guide channel 600. At this time, the lifting drive mechanism 120 drives the mounting plate 110 to descend to the specified height, and the guide channel 600 aligns with the motor output shaft 900. The pressing drive mechanism 720 is activated, pushing the pressing head 710 downward. The pressing head 710 pushes the inner retaining spring 910 to move within the guide channel 600. As the inner diameter of the guide channel 600 gradually decreases, the inner retaining spring 910 tightens. When the inner retaining spring 910 moves out of the guide channel 600 and enters the end of the motor output shaft 900, the inner retaining spring 910 elastically releases and snaps into the motor output shaft 900, completing the installation. This solution upgrades the installation of the internal retaining ring 910 from "relying on manual experience" to "precise mechanical execution," achieving a comprehensive breakthrough in efficiency, accuracy, cost, and safety. It is especially suitable for mass production of motors, providing a cost-effective solution for industrial automated assembly.

[0094] The above description is only a specific embodiment of the present utility model, but the technical 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 device for mounting an internal retaining ring on a motor output shaft, characterized in that, include: frame; The mounting plate is vertically movable and mounted on the frame; A lifting drive mechanism is connected to the mounting plate and is used to drive the mounting plate to move in the vertical direction; A fixing mechanism, provided on the frame, is used to position and fix the motor output shaft to be installed with the inner snap ring; An internal retaining spring feeding mechanism is provided on the mounting plate and is used to accommodate multiple stacked internal retaining springs; The feeding channel is located below the inner retaining spring feeding mechanism, and its thickness is configured to allow a single layer of inner retaining spring to pass through while restricting multiple layers of inner retaining springs from passing through simultaneously. A pushing mechanism, located on the mounting plate, includes a pushing member that can extend into the feeding channel, used to push out a single-layer inner retaining spring in the feeding channel; The guide channel is connected to the discharge end of the feeding channel, and its inner wall is tapered, wider at the top and narrower at the bottom. The pressing mechanism includes a pressing head located directly above the guide channel and a pressing drive mechanism that drives the pressing head to move axially along the guide channel. The pressing head is used to press the inner retaining spring located in the guide channel downward along the guide channel, so that it contracts and deforms under the action of the inner wall of the tapered guide channel, and then snaps into the end of the motor output shaft after disengaging from the guide channel.

2. The internal retaining ring mounting device for a motor output shaft as described in claim 1, characterized in that, The inner retaining spring feeding mechanism is configured to keep the stacked inner retaining springs in the same opening direction.

3. The internal retaining ring mounting device for a motor output shaft as described in claim 2, characterized in that, The internal snap ring feeding mechanism includes: A vertically arranged guide post, with stacked inner retaining springs sleeved on the guide post; A directional component, located on one side of the guide post and at the opening of the inner retaining spring, is used to constrain the opening direction of the stacked inner retaining springs.

4. The internal retaining ring mounting device for a motor output shaft as described in claim 1, characterized in that, The internal snap ring mounting device for the motor output shaft also includes: The support mechanism includes a support plate that can move laterally and is located below the outlet end of the feeding channel, and a support drive mechanism that drives the support plate to move. The support plate is located vertically below the pusher of the pusher mechanism, and is used to receive the inner retaining spring pushed out by the pusher mechanism and make it smoothly enter the guide channel.

5. The internal retaining ring mounting device for a motor output shaft as described in claim 4, characterized in that, The support plate is located at the entrance of the guide channel.

6. The internal retaining ring mounting device for a motor output shaft as described in claim 1, characterized in that, The fixing mechanism includes: a fixing groove adapted to the motor housing; and / or a limiting part inserted into the motor output shaft.

7. The internal retaining ring mounting device for a motor output shaft as described in claim 1, characterized in that, The feeding mechanism includes a feeding cylinder fixed on the mounting plate, and the piston of the feeding cylinder is connected to a feeding component that extends into the feeding channel.

8. The internal retaining ring mounting device for a motor output shaft as described in claim 1, characterized in that, The inner wall of the guide channel is a continuously contracting conical surface or a stepped diameter-reducing surface, which forces the inner diameter to shrink when the inner retaining spring is pressed down.

9. The internal retaining ring mounting device for a motor output shaft as described in claim 1, characterized in that, The thickness of the feeding channel ranges from 1.1 to 1.8 times the thickness of a single-layer inner retaining spring.

10. The internal retaining ring mounting device for a motor output shaft as described in claim 1, characterized in that, The frame is provided with a vertical guide rod, and the mounting plate is slidably disposed on the vertical guide rod.

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