A clip spring mounting device for an injection molded part

Abstract

The application discloses a clamp spring mounting device for injection molding parts, and relates to the technical field of clamp spring mounting, which comprises a workbench, a limiting mechanism, a feeding mechanism and a cleaning mechanism. A base plate is arranged on the workbench, a fixing seat is arranged on the base plate, the limiting mechanism is arranged on the base plate and the fixing seat and is used for fixing the injection molding part on which the clamp spring is mounted, the feeding mechanism is arranged on the base plate and is used for assembling the clamp spring on the clamp groove of the outer shaft of the injection molding part, and the cleaning mechanism is arranged on the fixing seat and is used for cleaning the impurities in the clamp groove of the outer shaft of the injection molding part. Before the clamp spring is pressed and mounted, the cleaning brush is used to sweep the clamp groove of the outer shaft of the injection molding part, so that the plastic flash, dust and chippings are effectively removed, and the assembly qualified rate is obviously improved. The feeding action is cleverly used by the cleaning mechanism: when the feeding plate is fed, the driving slope and the extrusion slope are matched to convert the horizontal displacement into the vertical movement of the lifting plate, so that the cleaning brush is driven to work synchronously; when the feeding plate is reset, the lifting plate is lifted by the spring.

Description

Technical Field

[0001] This invention relates to the technical field of snap ring mounting, and more specifically to a snap ring mounting device for injection molded parts. Background Technology

[0002] In the manufacturing process of injection-molded parts, it is usually necessary to assemble a retaining circlip within the outer shaft groove of the injection-molded part to axially limit the parts on the shaft and prevent them from shifting or falling off. This is one of the key processes in the subsequent assembly of injection-molded parts. Currently, most retaining circlip installation devices in the industry adopt a structure of positioning fixtures combined with a push-press mechanism. After fixing the injection-molded part, the retaining circlip is pushed into the groove to complete the assembly operation.

[0003] However, in actual production, plastic flash, mold burrs, injection dust, and fine debris inevitably remain in the annular groove of the outer shaft of the injection molded part. If the groove is not cleaned before pressing the retaining spring, the following significant defects will occur: First, the impurities in the groove will occupy the internal space of the groove, causing the retaining spring to fail to fully engage with the bottom of the groove, resulting in problems such as improper assembly, misalignment, or spring-on detachment, directly causing poor product assembly and significantly reducing the product qualification rate; Second, during the pressing process, hard plastic debris and flash will scratch the anti-rust coating on the surface of the retaining spring and wear down the inner wall structure of the groove of the injection molded part, damaging the elastic performance of the retaining spring and the positioning accuracy of the groove, seriously affecting the connection reliability and service life of the product. Summary of the Invention

[0004] The purpose of this invention is to provide a retaining spring mounting device for injection molded parts, overcoming the unavoidable residue of plastic flash, mold burrs, injection dust, and fine debris in the annular retaining groove of the outer shaft of the injection molded part in the prior art. If the retaining spring is press-fitted directly without cleaning the groove, the following significant drawbacks exist: First, impurities in the groove will occupy the internal space, preventing the retaining spring from fully engaging at the bottom of the groove, resulting in problems such as improper assembly, misalignment, or spring-on detachment, directly causing poor product assembly and significantly reducing the product qualification rate; Second, during the press-fitting process, hard plastic debris and flash will scratch the anti-rust coating on the retaining spring surface and wear down the inner wall structure of the injection molded part's retaining groove, damaging the elastic performance of the retaining spring and the positioning accuracy of the groove, seriously affecting the connection reliability and service life of the product.

[0005] A retaining ring mounting device for injection molded parts includes a worktable, a limiting mechanism, a feeding mechanism, and a cleaning mechanism. A pad is provided on the worktable, and a fixing seat is provided on the pad. The limiting mechanism is mounted on the pad and the fixed base and is used to fix the injection molded part on which the snap ring is installed; The feeding mechanism is mounted on the pad and is used to assemble the snap ring into the slot on the outer shaft of the injection molded part; The cleaning mechanism is mounted on a fixed base and cleans impurities in the groove of the outer shaft on the injection molded part.

[0006] Furthermore, the limiting mechanism includes a support, a limiting post, a limiting seat, and a cylinder. The support is mounted on a pad, the limiting post is located inside the support, the limiting seat is mounted on a fixed seat and has a limiting groove that is directly opposite the limiting post, and the cylinder is mounted on a mounting seat on the pad. The piston rod end of the cylinder has a pressure head.

[0007] Furthermore, the feeding mechanism includes a movable seat, a second cylinder, a feeding plate, and a feeding frame. The movable seat is slidably connected to a slide rail on a pad. The second cylinder is installed at the bottom of a fixed seat and its piston rod end is connected to the movable seat. The feeding plate is disposed on the movable seat and slidably connected to a limiting block on the fixed seat. The feeding frame is disposed on the side of the limiting seat, and the feeding plate is provided with a feeding groove facing the feeding frame.

[0008] Furthermore, the cleaning mechanism includes a lifting plate, a guide rod, a spring, a cleaning brush, and a drive plate. The lifting plate is slidably connected to the guide rod on the fixed seat. The upper end of the guide rod is provided with a baffle plate. The spring is sleeved on the guide rod and located between the fixed seat and the lifting plate. The cleaning brush is located on the inner side of the lifting plate. The outer side of the lifting plate is provided with a pressing plate. The pressing plate is provided with a pressing inclined surface. The end of the feeding plate is provided with a deflector plate. The drive plate is located on the deflector plate and has a drive inclined surface that cooperates with the pressing inclined surface.

[0009] Furthermore, the slide rails are provided in two symmetrical positions directly below the movable seat.

[0010] Furthermore, the feeding rack has an arc-shaped structure.

[0011] Furthermore, the dial has an overall "L" shaped structure.

[0012] Furthermore, the end face of the dial extends to contact the outer side of the limiting seat.

[0013] Furthermore, the guide rods are provided in two and symmetrically slidably connected to both ends of the lifting plate.

[0014] The beneficial effects achieved by this invention are as follows: 1. This application uses a cleaning mechanism to clean the groove of the outer shaft of the injection molded part before the snap ring is press-fitted. By using a cleaning brush to sweep across the inner wall of the groove, residual plastic flash, injection dust and small debris can be removed from the groove, preventing impurities from occupying the groove space and hindering the snap ring engagement. This ensures that the snap ring can be accurately embedded in the bottom of the groove, eliminating problems such as improper snap ring assembly, misalignment, and detachment, and significantly improving the product assembly qualification rate and consistency.

[0015] 2. The cleaning mechanism of this application utilizes the feeding action of the feeding plate in the feeding mechanism. On one hand, the pusher plate moves the cleaning brush; on the other hand, the driving inclined surface of the drive plate on the pusher plate cooperates with the pressing inclined surface on the pressing plate, converting the horizontal movement of the feeding plate into the vertical descent of the lifting plate, simultaneously driving the cleaning brush to complete the slot cleaning. When the feeding plate resets, the lifting plate automatically rises and resets due to spring force. The cleaning action and the snap ring pressing action are synchronized, greatly simplifying the overall structure of the device, reducing manufacturing costs and control difficulty, reducing additional energy consumption, and adapting to automated mass production.

[0016] 3. The limiting mechanism uses limiting posts and limiting grooves to achieve horizontal positioning of the injection molded parts. In conjunction with the cylinder, the pressure head is driven to vertically press the workpiece, which can effectively prevent the injection molded parts from shifting during cleaning and pressing. This further ensures the accuracy of the cleaning position of the slot and the pressing position of the retaining spring, and improves the stability of the device operation. Attached Figure Description

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments: Figure 1 This is a front view of the entire invention.

[0018] Figure 2 This is a schematic diagram of the structure of the present invention before it is installed on the front of the workbench.

[0019] Figure 3 This is a schematic diagram of the structure of the present invention after the injection-molded part and the outer shaft are installed.

[0020] Figure 4 This is a schematic diagram of the cleaning mechanism of the present invention.

[0021] Figure 5 This is a schematic diagram of the structure of the feeding plate, the dial plate, and the drive plate of the present invention.

[0022] The following are explanations of the reference numerals in the attached drawings: 1. Workbench; 2. Pad; 3. Fixed seat; 4. Limiting mechanism; 41. Support; 42. Limiting post; 43. Limiting seat; 431. Limiting groove; 44. Cylinder 1; 45. Mounting seat; 46. Press head; 5. Feeding mechanism; 51. Moving seat; 52. Slide rail; 53. Cylinder II; 54. Feeding plate; 541. Feeding trough; 55. Limit block; 56. Loading rack; 6. Cleaning mechanism; 61. Lifting plate; 62. Guide rod; 621. Baffle plate; 63. Spring; 64. Cleaning brush; 65. Extrusion plate; 651. Extrusion slope; 66. Paddle plate; 67. Drive plate; 671. Drive slope. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0024] like Figure 1-5 As shown, the present invention provides a retaining ring mounting device for injection molded parts, including a worktable 1, a limiting mechanism 4, a feeding mechanism 5 and a cleaning mechanism 6. The worktable 1 is provided with a pad 2, and the pad 2 is provided with a fixing seat 3. In addition, the limiting mechanism 4 is provided on the pad 2 and the fixed seat 3 and is used to fix the injection molded part with the snap ring installed. The limiting mechanism 4 includes a support 41, a limiting post 42, a limiting seat 43 and a cylinder 44. The support 41 is provided on the pad 2. The limiting post 42 is provided on the inner side of the support 41. The limiting seat 43 is provided on the fixed seat 3 and has a limiting groove 431 that is directly opposite to the limiting post 42. The cylinder 44 is installed on the mounting seat 45 on the pad 2. The piston rod end of the cylinder 44 is provided with a pressure head 46. The piston rod of the cylinder 44 drives the pressure head 46 to move, thereby fixing the injection molded part and the outer shaft on the worktable 1. It is worth noting that the feeding mechanism 5 is located on the pad 2 and is used to assemble the snap ring into the slot of the outer shaft on the injection molded part. The feeding mechanism 5 includes a movable seat 51, a second cylinder 53, a feeding plate 54 and a feeding frame 56. The movable seat 51 is slidably connected to the slide rail 52 on the pad 2. There are two slide rails 52 and they are symmetrically arranged directly below the movable seat 51. The two slide rails 52 make the movable seat 51 slide more smoothly. In addition, the second cylinder 53 is installed at the bottom of the fixed seat 3 and its piston rod end is connected to the movable seat 51. The feeding plate 54 is provided on the movable seat 51 and is slidably connected to the limiting block 55 on the fixed seat 3. The loading rack 56 is provided on the side of the limiting seat 43. The loading rack 56 has an arc-shaped structure. The feeding plate 54 is provided with a feeding groove 541 facing the loading rack 56. The arc-shaped loading rack 56 can guide the snap ring to slide smoothly into the feeding groove 541 of the feeding plate 54, and the snap ring is assembled into the snap ring groove of the outer shaft on the injection molded part through the feeding plate 54. It should be noted that the cleaning mechanism 6 is mounted on the fixed base 3 and cleans impurities in the groove of the outer shaft on the injection molded part. The cleaning mechanism 6 includes a lifting plate 61, a guide rod 62, a spring 63, a cleaning brush 64, and a drive plate 67. The lifting plate 61 is slidably connected to two guide rods 62 on the fixed base 3. The two guide rods 62 make the lifting plate 61 more stable during the up and down movement. The upper end of the guide rod 62 is provided with a baffle 621 to prevent the lifting plate 61 from disengaging from the guide rod 62. The spring 63 is sleeved on the guide rod 62 and located between the fixed base 3 and the lifting plate 61. In addition, the cleaning brush 64 is located on the inner side of the lifting plate 61, and the outer side of the lifting plate 61 is provided with an extrusion plate 65. The extrusion plate 65 is provided with an extrusion inclined surface 651. The end of the feeding plate 54 is provided with a deflector plate 66. The deflector plate 66 has an overall "L" shaped structure. The end face of the deflector plate 66 extends to contact the outer side of the limiting seat 43, so that the deflector plate 66 can cover the root of the cleaning brush 64, thereby allowing the cleaning brush 64 to be deflected as a whole, avoiding interference of the cleaning brush 64 with the outer shaft of the injection molded part during assembly. The drive plate 67 is located on the deflector plate 66 and is provided with a drive inclined surface 671 that cooperates with the extrusion inclined surface 651. The piston rod of cylinder 53 drives the moving seat 51 to move, causing the feeding plate 54 to move toward the groove of the outer shaft on the injection molded part. The cleaning brush 64 is moved by the paddle plate 66, and the oscillating cleaning brush 64 cleans the groove of the outer shaft. At the same time, through the cooperation of the driving inclined surface 671 and the extrusion inclined surface 651 on the paddle plate 66, the lifting plate 61 is automatically pressed and the spring 63 is compressed, causing the cleaning brush 64 to move down. When the feeding plate 54 is reset, the spring force of the spring 63 causes the cleaning brush 64 to move up to reset. Detailed implementation methods and principles: During operation, the piston rod of cylinder 53 of the feeding mechanism 5 is in the extended state, the feeding groove 541 of the feeding plate 54 is directly opposite the discharge port of the arc-shaped feeding frame 56, and the snap rings arranged in an orderly manner in the feeding frame 56 fall into the feeding groove 541 by their own weight to complete the waiting for materials. Next, the injection molded part to be assembled with the retaining ring is placed on the limiting post 42 of the support 41, and the outer shaft on the injection molded part is placed in the limiting groove 431 of the limiting seat 43. During the installation of the injection molded part, the cleaning brush 64 on the lifting plate 61 is disturbed, and the retaining groove on the outer shaft is cleaned accordingly by the cleaning brush 64. Then cylinder 44 is activated, and the piston rod of cylinder 44 extends, driving the end pressure head 46 to press the outer shaft of the injection molded part, and firmly fix the injection molded part on the limit seat 43 to prevent displacement during assembly. Next, cylinder 2 53 starts, and the piston rod of cylinder 2 53 retracts, driving the moving seat 51 to slide along the slide rail 52 on the pad 2. The feeding plate 54 on the moving seat 51 moves synchronously along the limiting block 55 on the fixed seat 3. The whole process is divided into two steps: 1. When the feeding plate 54 moves, the push plate 66 pushes the cleaning brush 64 to below the push plate 66. At the same time, the drive slope 671 on the drive plate 67 drives the lifting plate 61 to move down through the extrusion slope 651 on the extrusion plate 65, so that the spring 63 on the guide rod 62 is compressed. The cleaning brush 64 on the inner side of the lifting plate 61 then descends and sweeps across the annular groove of the outer shaft of the injection molded part, cleaning the plastic flash, dust and other impurities remaining in the groove, ensuring the fitting accuracy of the snap ring assembly. 2. The feeding plate 54 continues to move forward. After the cleaning brush 64 remains in a downward state and completes the cleaning of the entire slot, the retaining spring in the feeding slot 541 of the feeding plate 54 is precisely pushed to the outer shaft of the injection molded part and finally snaps into the slot of the outer shaft, completing the press-fitting operation of the retaining spring. After the snap ring is assembled, cylinder 2 53 reverses its movement, and the piston rod of cylinder 2 53 extends, driving the moving seat 51 and the feeding plate 54 to reset. During the reset process, the drive plate 67 gradually disengages from the pressing plate 65, the lifting plate 61 loses its downward pressure, and under the rebound action of the spring 63, it is lifted upward along the guide rod 62 to reset, and the cleaning brush 64 is reset. After the feeding plate 54 is completely returned to the initial position, the next snap ring in the arc-shaped feeding rack 56 automatically falls into the feeding groove 541, completing the next waiting for material. Finally, the piston rod of cylinder 44 retracts, and the pressure head 46 releases the outer shaft on the injection molded part, allowing the assembled workpiece to be removed, thus completing a full work cycle.

[0025] In summary, this application uses the cleaning mechanism 6 to clean the slot of the outer shaft of the injection molded part before the snap ring is press-fitted. The cleaning brush 64 sweeps across the inner wall of the slot, removing residual plastic flash, injection dust, and small debris. This prevents impurities from occupying the slot space and hindering snap ring engagement, ensuring the snap ring can be accurately embedded at the bottom of the slot. This eliminates problems such as misalignment, misalignment, or detachment of the snap ring, significantly improving the product assembly qualification rate and consistency. The cleaning mechanism 6, through the feeding action of the feeding plate 54 in the feeding mechanism 5, uses the pusher plate 66 to move the cleaning brush 64. Simultaneously, the drive slope 671 of the drive plate 67 on the pusher plate 66 cooperates with the extrusion slope 651 on the extrusion plate 65, converting the horizontal movement of the feeding plate 54 into the vertical descent of the lifting plate 61, synchronously driving the cleaning brush 64 to complete the slot cleaning. When the feeding plate 54 resets, the lifting plate 61 automatically rises and resets due to the elastic force of the spring 63. The cleaning action and the snap ring pressing action are synchronized, which greatly simplifies the overall structure of the device, reduces manufacturing costs and control difficulty, reduces additional energy consumption, and is suitable for automated mass production.

[0026] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," 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 or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0027] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0028] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0029] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, are all within the protection scope of the present invention.

Claims

1. A retaining spring mounting device for injection molded parts, characterized in that: It includes a workbench (1), a limiting mechanism (4), a feeding mechanism (5) and a cleaning mechanism (6). The workbench (1) is provided with a pad (2) and the pad (2) is provided with a fixed seat (3). The limiting mechanism (4) is provided on the pad (2) and the fixing seat (3) and is used to fix the injection molded part on which the snap ring is installed; The feeding mechanism (5) is mounted on the pad (2) and is used to assemble the snap ring into the slot of the outer shaft of the injection molded part; The cleaning mechanism (6) is mounted on the fixed base (3) and cleans the impurities in the groove of the outer shaft on the injection molded part.

2. The retaining ring mounting device for injection molded parts according to claim 1, characterized in that: The limiting mechanism (4) includes a support (41), a limiting post (42), a limiting seat (43), and a cylinder (44). The support (41) is mounted on the pad (2). The limiting post (42) is located inside the support (41). The limiting seat (43) is mounted on the fixed seat (3) and has a limiting groove (431) that is directly opposite to the limiting post (42). The cylinder (44) is mounted on the mounting seat (45) on the pad (2). The piston rod end of the cylinder (44) is provided with a pressure head (46).

3. The retaining ring mounting device for injection molded parts according to claim 2, characterized in that: The feeding mechanism (5) includes a movable seat (51), a second cylinder (53), a feeding plate (54), and a feeding rack (56). The movable seat (51) is slidably connected to the slide rail (52) on the pad (2). The second cylinder (53) is installed at the bottom of the fixed seat (3) and its piston rod end is connected to the movable seat (51). The feeding plate (54) is located on the movable seat (51) and is slidably connected to the limiting block (55) on the fixed seat (3). The feeding rack (56) is located on the side of the limiting seat (43). The feeding plate (54) is provided with a feeding groove (541) facing the feeding rack (56).

4. The retaining ring mounting device for injection molded parts according to claim 2, characterized in that: The cleaning mechanism (6) includes a lifting plate (61), a guide rod (62), a spring (63), a cleaning brush (64), and a drive plate (67). The lifting plate (61) is slidably connected to the guide rod (62) on the fixed seat (3). The upper end of the guide rod (62) is provided with a baffle (621). The spring (63) is sleeved on the guide rod (62) and located between the fixed seat (3) and the lifting plate (61). The cleaning brush (64) is located on the inner side of the lifting plate (61). The outer side of the lifting plate (61) is provided with a pressing plate (65). The pressing plate (65) is provided with a pressing inclined surface (651). The end of the feeding plate (54) is provided with a deflector plate (66). The drive plate (67) is located on the deflector plate (66) and is provided with a drive inclined surface (671) that cooperates with the pressing inclined surface (651).

5. The retaining ring mounting device for injection molded parts according to claim 3, characterized in that: The slide rail (52) is provided in two symmetrical positions directly below the movable seat (51).

6. The retaining ring mounting device for injection molded parts according to claim 3, characterized in that: The feeding rack (56) has an arc-shaped structure.

7. The retaining ring mounting device for injection molded parts according to claim 4, characterized in that: The dial (66) has an overall "L" shaped structure.

8. The retaining ring mounting device for injection molded parts according to claim 7, characterized in that: The end face of the dial (66) extends to contact the outer side of the limiting seat (43).

9. A retaining ring mounting device for injection molded parts according to claim 4, characterized in that: The guide rod (62) is provided in two parts and is symmetrically slidably connected to both ends of the lifting plate (61).

Images