Clamp spring press-fitting device

Abstract

The utility model belongs to the field of snap spring assembling, and particularly relates to a snap spring press-fitting device which is characterized in that when the snap spring press-fitting device is used, an opening of a snap spring is aligned to the middle of a movable pin and is inserted between two arc-shaped notches, then the snap spring is arranged in the middle of the movable pin in a sleeving manner, and a press-fitting assembly is driven by a pressure applying mechanism to move downwards; under the continuous action of the pressure applying mechanism, the movable pin can overcome the elastic force of the spiral spring and retract into the mounting cylinder, and the clamping spring arranged in the middle of the movable pin in a sleeving mode is pushed by the lower end of the mounting cylinder to be opened through the conical pressing head and then is downwards clamped into a clamping groove in the motor mandrel. Therefore, the assembling efficiency is high, the clamp spring is not easy to deform and damage, and the product quality is improved.

Description

Technical Field

[0001] This application relates to the field of snap ring assembly technology, and in particular to a snap ring press-fitting device. Background Technology

[0002] Snap rings (elastic retaining rings), as key axial positioning components in the mechanical field, are primarily used to hold other components axially within an annular limiting groove on the outer wall of a shaft, preventing them from detaching. In motor production and assembly, the current installation of snap rings on motor shafts is done manually using snap ring pliers. This requires adjusting the pliers angle, manually compressing or expanding the snap ring, and then aligning it with the groove before insertion. Manual operation is time-consuming, labor-intensive, and inefficient. Due to the small size and high elasticity of the snap ring, it is easy for it to pop out and cause injury during manual installation. Furthermore, manual operation may lead to snap ring deformation or improper installation, affecting motor performance. Utility Model Content

[0003] This application provides a snap ring pressing device to solve the technical problems of low efficiency, safety hazards, and easy deformation or improper installation of snap rings when manually operating snap ring pliers to complete snap ring assembly.

[0004] To achieve the above objectives, this application provides a snap ring pressing device, including a base, a column disposed on the base, a pressing mechanism disposed on the column, and a pressing assembly connected to the pressing mechanism;

[0005] The press-fit assembly includes a mounting cylinder, a helical spring, and a movable pin. The upper end of the mounting cylinder is mounted on the pressure-applying mechanism and can move along the height direction of the column under the drive of the pressure-applying mechanism. The helical spring and the movable pin are arranged sequentially from top to bottom inside the mounting cylinder, and a gap is provided between the movable pin and the inner wall of the mounting cylinder. The upper end of the helical spring is connected to the inner wall of the mounting cylinder, and the lower end is connected to the movable pin. The middle and lower ends of the movable pin extend from the lower end of the mounting cylinder. The middle of the movable pin is symmetrically provided with two arc-shaped notches. The part of the middle of the movable pin located between the two arc-shaped notches is used to install a retaining ring. The lower end of the movable pin is a tapered pressure head with the larger end facing down.

[0006] Optionally, the width of the middle portion of the movable pin between the two arc-shaped notches is smaller than the opening width of the retaining ring.

[0007] Optionally, the top of the movable pin is provided with a plug post, which is inserted into the lower end of the helical spring and has an interference fit with the helical spring.

[0008] Optionally, the pressure applying mechanism includes a mounting base, a pressure column, a return spring, and a drive assembly. The mounting base is fixed to the column and located above the base. A through hole is provided on the mounting base along the height direction of the column. The pressure column is movably inserted into the through hole, and both the upper and lower ends of the pressure column extend out of the through hole. The return spring is disposed between the pressure column and the inner wall of the through hole. The drive assembly is disposed on the top of the mounting base and is used to apply downward pressure to the pressure column so that the pressure column overcomes the elastic force of the return spring and moves downward. The upper end of the mounting cylinder is mounted on the lower end of the pressure column.

[0009] Optionally, the drive assembly includes a motor fixed to the top of the mounting base and a cam fixed to the output shaft of the motor, the circumferential outer wall of the cam abutting against the upper end of the pressure column.

[0010] Optionally, the outer wall of the pressure column is provided with a circumferential flange near the upper end of the pressure column, and the inner wall of the through hole is provided with a circumferential protrusion near the lower end of the pressure column. The return spring is sleeved on the pressure column, and the two ends of the return spring abut against the circumferential flange and the circumferential protrusion, respectively.

[0011] Optionally, the upper end of the mounting cylinder is detachably connected to the lower end of the pressure column.

[0012] Optionally, the upper inner wall of the mounting cylinder is provided with an internal thread, and the lower outer wall of the pressure column is provided with an external thread, and the upper end of the mounting cylinder and the lower end of the pressure column are connected by threads.

[0013] The beneficial effects of the snap ring pressing device provided in this application are as follows: Compared with the prior art, when using the snap ring pressing device of this application, the motor is placed on the base, the motor spindle is located below the pressing assembly and coaxial with the movable pin, the opening of the snap ring is aligned with the middle of the movable pin and inserted between the two arc-shaped notches, and then the snap ring is sleeved in the middle of the movable pin. The pressing assembly is driven downward by the pressure mechanism, so that the lower end of the movable pin abuts against the shaft end of the motor spindle to be assembled with the snap ring. Since the movable pin is connected to the mounting cylinder through a helical spring, under the continued action of the pressure mechanism, the movable pin can overcome the elastic force of the helical spring and retract into the mounting cylinder. The snap ring sleeved in the middle of the movable pin is pushed by the lower end of the mounting cylinder and is opened by the conical pressure head and then inserted downward into the slot on the motor spindle to complete the assembly with the motor spindle. Since the middle of the movable pin is symmetrically provided with two arc-shaped notches, the width is narrow, which facilitates the lateral installation of the snap ring, improves the installation efficiency of the snap ring, has high assembly efficiency, is not prone to deformation and damage of the snap ring, and improves product quality. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] in:

[0016] Figure 1 This is a schematic diagram of the overall structure of the snap ring pressing device shown in one embodiment of this application;

[0017] Figure 2 This is a cross-sectional structural schematic diagram of the pressing assembly in a snap ring pressing device according to an embodiment of this application;

[0018] Figure 3 This is a schematic diagram of the pressure application mechanism in a snap ring press-fitting device according to an embodiment of this application;

[0019] Figure 4 This is a three-dimensional structural diagram of the movable pin and the retaining ring in the pressing assembly of the retaining ring pressing device according to an embodiment of this application.

[0020] Explanation of key component symbols:

[0021] 10. Snap ring;

[0022] 100. Base; 110. Pad;

[0023] 200. Column;

[0024] 300, Pressure applying mechanism; 310, Mounting base; 311, Through hole; 3111, Circumferential protrusion; 320, Pressure column; 321, Circumferential flange; 322, External thread; 330, Return spring; 340, Drive assembly; 341, Motor; 342, Cam;

[0025] 400, Press-fit assembly; 410, Mounting cylinder; 411, Internal thread; 420, Helical spring; 430, Movable pin; 4301, Arc-shaped notch; 431, Insertion post; 432, Conical pressure head. Detailed Implementation

[0026] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are shown in the drawings. However, this application can be implemented in many other different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of this application.

[0027] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0028] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., 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 application 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 application.

[0029] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0031] As described in the background section, the current installation process for retaining rings on motor spindles is done manually using retaining ring pliers. This manual operation is time-consuming, labor-intensive, and inefficient. Because retaining rings are small and highly elastic, they can easily pop out and cause injury during manual installation. Furthermore, manual operation may lead to deformation of the retaining ring or improper installation, affecting motor performance.

[0032] To address the aforementioned problems, embodiments of this application provide a snap ring press-fitting device, such as... Figure 1 and Figure 4As shown, the snap ring pressing device includes a base 100, a column 200 disposed on the base 100, a pressing mechanism 300 disposed on the column 200, and a pressing assembly 400 connected to the pressing mechanism 300. The press-fit assembly 400 includes a mounting cylinder 410, a helical spring 420, and a movable pin 430. The upper end of the mounting cylinder 410 is mounted on the pressure applying mechanism 300 and can move in the height direction of the column 200 under the drive of the pressure applying mechanism 300. The helical spring 420 and the movable pin 430 are arranged sequentially from top to bottom inside the mounting cylinder 410, and there is a gap between the movable pin 430 and the inner wall of the mounting cylinder 410. The upper end of the helical spring 420 is connected to the inner wall of the mounting cylinder 410, and the lower end is connected to the movable pin 430. The middle and lower ends of the movable pin 430 extend from the lower end of the mounting cylinder 410. The middle of the movable pin 430 is symmetrically provided with two arc-shaped notches 4301. The part of the middle of the movable pin 430 located between the two arc-shaped notches 4301 is used to install the snap ring 10. The lower end of the movable pin 430 is a tapered pressure head 432 with the larger end facing down.

[0033] Understandably, the retaining ring 10 can be opened when it passes through the conical pressure head 432.

[0034] Because the movable pin 430 has two symmetrically arranged arc-shaped notches 4301 in the middle, its width is relatively narrow, which facilitates the lateral insertion of the retaining ring 10 and improves the installation efficiency of the retaining ring 10. Figure 4 As shown, the width L1 of the middle part of the movable pin 430 between the two arc-shaped notches 4301 is smaller than the opening width L2 of the retaining ring 10.

[0035] In use, the snap ring pressing device places the motor on the base 100, with the motor spindle located below the pressing assembly 400 and coaxial with the movable pin 430. The opening of the snap ring 10 is aligned with the center of the movable pin 430 and inserted laterally between the two arc-shaped notches 4301, thus fitting the snap ring 10 onto the center of the movable pin 430. The pressing assembly 400 is then driven downwards by the pressure applying mechanism 300, causing the lower end of the movable pin 430 to abut against the shaft end of the motor spindle to be fitted with the snap ring. Since the movable pin 430 is connected by a helical spring... 420 is connected to the mounting cylinder 410. Therefore, under the continued action of the pressure mechanism 300, the movable pin 430 can overcome the elastic force of the coil spring 420 and retract into the mounting cylinder 410. The retaining ring 10 sleeved in the middle of the movable pin 430 is pushed by the lower end of the mounting cylinder 410 and then pushed down into the retaining groove on the motor spindle by the conical pressure head 432 (a click sound indicates that the retaining ring has been installed in the retaining groove), so as to complete the assembly with the motor spindle. The assembly efficiency is high, and it is not easy to cause deformation and damage to the retaining ring 10, thus improving the product quality.

[0036] It is understandable that the large end diameter of the tapered pressure head 432 at the lower end of the movable pin 430 is consistent with the outer diameter of the motor spindle to which the snap ring is to be installed, and the inner diameter of the mounting cylinder 410 is larger than the outer diameter of the motor spindle. During the assembly of the snap ring 10, the snap ring 10, which is sleeved in the middle of the movable pin 430, can be smoothly moved onto the motor spindle by the tapered pressure head 432 at the lower end of the movable pin 430 under the push of the lower end of the mounting cylinder 410.

[0037] Furthermore, a pad 110 can be provided on the base 100. The pad 110 can be made of rubber and used to support the motor.

[0038] In one embodiment, such as Figures 1-2 As shown, the top of the movable pin 430 is provided with a plug post 431, which is inserted into the lower end of the coil spring 420 and has an interference fit with the coil spring 420. This arrangement facilitates the assembly and disassembly of the movable pin 430 and the coil spring 420 by means of the plug post 431, so as to replace the corresponding movable pin 430 for motor spindles of different diameters.

[0039] In one embodiment, such as Figure 1 and Figure 3 As shown, the pressure applying mechanism 300 includes a mounting base 310, a pressure column 320, a return spring 330, and a drive assembly 340. The mounting base 310 is fixed on the column 200 and located above the base 100. A through hole 311 is provided on the mounting base 310 along the height direction of the column 200. The pressure column 320 is movably inserted into the through hole 311, and both the upper and lower ends of the pressure column 320 extend out of the through hole 311. The upper end of the mounting cylinder 410 is installed on the lower end of the pressure column 320. The return spring 330 is disposed between the pressure column 320 and the inner wall of the through hole 311. The drive assembly 340 is disposed on the top of the mounting base 310. The drive assembly 340 is used to apply downward pressure to the pressure column 320 so that the pressure column 320 overcomes the elastic force of the return spring 330 and moves downward. When the pressure column 320 moves downward, it drives the pressing assembly 400 to move downward together.

[0040] The drive assembly 340 includes a motor 341 fixed to the top of the mounting base 310 and a cam 342 fixed to the output shaft of the motor 341. The circumferential outer wall of the cam 342 abuts against the upper end of the pressure column 320. The motor 341 drives the cam 342 to rotate, thereby applying downward pressure to the pressure column 320.

[0041] Furthermore, the drive assembly 340 also includes a foot switch, which is electrically connected between the motor 341 and the power supply. In use, the foot switch is placed on the ground, and the user controls the start and stop of the motor 341 by stepping on the foot switch with the ball of their foot.

[0042] In one specific embodiment, Figure 1 and Figure 3 As shown, a circumferential flange 321 is provided on the outer wall of the pressure column 320 near the upper end of the pressure column 320, and a circumferential protrusion 3111 is provided on the inner wall of the through hole 311 near the lower end of the pressure column 320. The return spring 330 is sleeved on the pressure column 320, and the two ends of the return spring 330 abut against the circumferential flange 321 and the circumferential protrusion 3111 respectively.

[0043] In one specific embodiment, such as Figures 1-3 As shown, the upper end of the mounting cylinder 410 is detachably connected to the lower end of the pressure column 320.

[0044] Specifically, the upper end of the mounting cylinder 410 is connected to the lower end of the pressure column 320 by a thread. This threaded connection facilitates installation and disassembly, allowing the snap ring pressing device to replace the entire pressing assembly 400 according to the diameter of the motor spindle and the size of the snap ring. Specifically, the upper inner wall of the mounting cylinder 410 has an internal thread 411, and the lower outer wall of the pressure column 320 has an external thread 322.

[0045] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0046] The above embodiments are merely illustrative of several implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A snap ring pressing device, characterized in that, It includes a base, a column disposed on the base, a pressure applying mechanism disposed on the column, and a press-fitting assembly connected to the pressure applying mechanism; The press-fit assembly includes a mounting cylinder, a helical spring, and a movable pin. The upper end of the mounting cylinder is mounted on the pressure-applying mechanism and can move along the height direction of the column under the drive of the pressure-applying mechanism. The helical spring and the movable pin are arranged sequentially from top to bottom inside the mounting cylinder, and a gap is provided between the movable pin and the inner wall of the mounting cylinder. The upper end of the helical spring is connected to the inner wall of the mounting cylinder, and the lower end is connected to the movable pin. The middle and lower ends of the movable pin extend from the lower end of the mounting cylinder. The middle of the movable pin is symmetrically provided with two arc-shaped notches. The part of the middle of the movable pin located between the two arc-shaped notches is used to install a retaining ring. The lower end of the movable pin is a tapered pressure head with the larger end facing down.

2. The snap ring pressing device according to claim 1, characterized in that, The width of the middle part of the movable pin between the two arc-shaped notches is smaller than the opening width of the retaining ring.

3. The snap ring pressing device according to claim 1, characterized in that, The top of the movable pin is provided with a plug post, which is inserted into the lower end of the helical spring and is interference-fitted with the helical spring.

4. The snap ring pressing device according to any one of claims 1-3, characterized in that, The pressure-applying mechanism includes a mounting base, a pressure column, a return spring, and a drive assembly. The mounting base is fixed to the column and located above the base. A through hole is provided on the mounting base along the height direction of the column. The pressure column is movably inserted into the through hole, and both its upper and lower ends extend out of the through hole. The return spring is disposed between the pressure column and the inner wall of the through hole. The drive assembly is disposed on the top of the mounting base and is used to apply downward pressure to the pressure column so that the pressure column overcomes the elastic force of the return spring and moves downward. The upper end of the mounting cylinder is mounted on the lower end of the pressure column.

5. The snap ring pressing device according to claim 4, characterized in that, The drive assembly includes a motor fixed to the top of the mounting base and a cam fixed to the output shaft of the motor, the circumferential outer wall of the cam abutting against the upper end of the pressure column.

6. The snap ring pressing device according to claim 4, characterized in that, The outer wall of the pressure column is provided with a circumferential flange near the upper end of the pressure column, and the inner wall of the through hole is provided with a circumferential protrusion near the lower end of the pressure column. The return spring is sleeved on the pressure column, and the two ends of the return spring abut against the circumferential flange and the circumferential protrusion, respectively.

7. The snap ring pressing device according to claim 4, characterized in that, The upper end of the mounting cylinder is detachably connected to the lower end of the pressure column.

8. The snap ring pressing device according to claim 7, characterized in that, The upper inner wall of the mounting cylinder is provided with internal threads, and the lower outer wall of the pressure column is provided with external threads. The upper end of the mounting cylinder and the lower end of the pressure column are connected by threads.

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