Snap ring assembly assembling system

Abstract

The utility model discloses a snap ring assembly assembling system which is used for coaxially assembling an end head, an end cover and a snap ring of a snap ring assembly, and the snap ring is clamped into a clamping cavity formed between an outer groove of the end head and an inner groove of the end cover to achieve axial limiting assembling with the end head and the end cover. The assembly system comprises a primary assembly device and a secondary assembly device, the primary assembly device axially presses the snap ring into an end outer groove of the end by enlarging the radial size of the snap ring, the secondary assembly device radially extrudes the snap ring to reduce the radial size of the snap ring, and the snap ring rebounds and restores to be clamped into an end cover inner groove of the end cover in the state of losing extrusion force. According to the clamping ring assembly, axial limiting assembly of the end and the end cover is achieved through the clamping ring through two-time step-by-step assembly, and the assembly quality and efficiency of the clamping ring assembly are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of snap ring assembly, and particularly relates to a snap ring component assembly system. Background Art

[0002] Figure 1 and Figure 2 A snap ring component is assembled by a head, an end cap and a snap ring. In order to save costs, factories generally adopt semi-manual assembly for such a simple assembly structure. The conventional semi-manual assembly process is as follows: the snap ring is expanded, the snap ring is assembled on the head, and then the end cap is aligned with the head for axial crimping. This assembly process not only easily affects the resilience of the snap ring and causes deformation, but also generates relatively large friction on the snap ring when the end cap is pressed on the head, affecting the assembly quality and yield. Summary of the Invention

[0003] Object of the Invention: In order to overcome the deficiencies existing in the prior art, the utility model provides a snap ring component assembly system, which realizes the axial limit assembly of the head and the end cap through the snap ring through two-step progressive assembly, and improves the assembly quality and efficiency of the snap ring component.

[0004] Technical Solution: To achieve the above object, a snap ring component assembly system of the utility model is used for the coaxial assembly of the head, the end cap and the snap ring of the snap ring component. The snap ring is axially pressed into the outer groove of the head by expanding the radial dimension of the snap ring, and the secondary assembly device radially extrudes the snap ring to reduce the radial dimension of the snap ring, so that the snap ring rebounds and restores to its original state and snaps into the inner groove of the end cap when the extrusion force is lost.

[0005] The assembly system includes a primary assembly device and a secondary assembly device. The primary assembly device axially presses the snap ring into the outer groove of the head by expanding the radial dimension of the snap ring, and the secondary assembly device radially extrudes the snap ring to reduce the radial dimension of the snap ring, so that the snap ring rebounds and restores to its original state and snaps into the inner groove of the end cap when the extrusion force is lost.

[0006] Further, the primary assembly device includes a pressing cylinder, a guiding frustum and a first positioning cylinder coaxially arranged from top to bottom. The head is positioned in the first positioning cylinder, the guiding frustum is arranged on the top of the head, and the pressing cylinder presses down the snap ring sleeved on the guiding frustum, so that the snap ring slides down along the guiding frustum to expand the radial dimension and snaps into the outer groove of the head.

[0007] Further, the bottom of the guiding frustum has a cavity, and the guiding frustum is sleeved on the head through the cavity.

[0008] Further, the barrel wall of the pressing cylinder is of a hollow structure.

[0009] Further, the secondary assembly device includes a pressing plate and a second positioning cylinder which are coaxially arranged up and down. The end head equipped with the snap ring is positioned in the second positioning cylinder, and the end cover is coaxially arranged above the end head. A plurality of pressing plates are arranged in a circumferential array around the snap ring. The pressing plate has a pressing driving part and an elastic supporting foot. The elastic supporting foot is arranged on the guiding slide rail. The pressing plate is driven by the pressing driving part to move forward radially to squeeze the snap ring to shrink and hide in the outer groove of the end head. The pressing plate is elastically lifted and supported by the elastic supporting foot.

[0010] Further, the pressing end of the pressing plate is in an arc structure.

[0011] Further, the pressing plate has a plate seat. The elastic supporting foot is located on the slider of the guiding slide rail. The pressing plate is connected to the elastic supporting foot through the plate seat.

[0012] Further, the pressing driving part is a screw rod push-pull mechanism arranged horizontally.

[0013] Beneficial effects: The utility model realizes the axial limit assembly of the end head and the end cover through the snap ring by two-step assembly. In the first assembly, the snap ring is snapped into the inner groove of the end cover by expanding the radial dimension of the snap ring, avoiding affecting the resilience of the snap ring and causing large deformation. In the second assembly, the snap ring is first squeezed and then the end cover is assembled. When squeezing the snap ring, the blockage of the end cover can be avoided, thereby greatly reducing the friction between the end cover and the snap ring, and achieving the purpose of improving the assembly quality and efficiency of the snap ring assembly as a whole. Description of the Drawings

[0014] Figure 1 is a schematic diagram of the overall structure of the assembly parts of the utility model;

[0015] Figure 2 is a schematic diagram of the half-sectional structure of the assembly parts of the utility model;

[0016] Figure 3 is a schematic diagram of the overall structure of the utility model;

[0017] Figure 4 is a schematic diagram of the structure of the secondary assembly device. Detailed Embodiment

[0018] The following further describes the utility model with reference to the drawings.

[0019] As Figure 1 and Figure 2 shown, a snap ring assembly system is used for the coaxial assembly of the end head 1, the end cover 2 and the snap ring 3 of the snap ring assembly. The snap ring 3 is snapped into the clamping cavity formed between the outer groove 10 of the end head and the inner groove 20 of the end cover to realize the axial limit assembly with the end head 1 and the end cover 2. AsFigure 2 As shown in the figure, the assembly system includes a primary assembly device 4 and a secondary assembly device 5. The primary assembly device 4 axially presses the snap ring 3 into the outer groove 10 of the end head 1 of the end head by expanding the radial dimension of the snap ring. The secondary assembly device 5 radially squeezes the snap ring 3 to reduce its radial dimension, so that the snap ring 3 rebounds and restores to snap into the inner groove 20 of the end cover 2 when the squeezing force is removed. The utility model realizes the axial limit assembly of the end head 1 and the end cover 2 through the snap ring 3 by two-step assembly. In the first assembly, the snap ring 3 is snapped into the inner groove 20 of the end cover by expanding the radial dimension of the snap ring, avoiding affecting the resilience of the snap ring 3 and causing large deformation. In the second assembly, the snap ring 3 is squeezed first and then the end cover 2 is assembled. When squeezing the snap ring 3, the blockage of the end cover 2 can be avoided, thus greatly reducing the friction between the end cover 2 and the snap ring 3, and achieving the purpose of improving the assembly quality and efficiency of the snap ring assembly as a whole.

[0020] As Figure 3 As shown in the figure, the primary assembly device 4 includes a pressing cylinder 4.1, a guiding frustum 4.2 and a first positioning cylinder 4.3 which are coaxially arranged from top to bottom. The end head 1 is positioned inside the first positioning cylinder 4.3. The guiding frustum 4.2 is arranged on the top of the end head 1. The pressing cylinder 4.1 presses down the snap ring 3 sleeved on the guiding frustum 4.2, so that the snap ring 3 slides down along the guiding frustum 4.2 to expand its radial dimension and snap into the outer groove 10 of the end head 1. During the process of the guiding frustum 4.2 guiding the snap ring 3 to slide down, the radial dimension of the snap ring 3 gradually increases instead of suddenly expanding, which can greatly reduce the influence on the resilience of the snap ring 3. When the snap ring 3 reaches the position of the outer groove 10 of the end head, it snaps into the outer groove 10 of the end head through its own resilience, completing the assembly of the end head 1 and the snap ring 3.

[0021] In the utility model, the preferred installation method of the guiding frustum 4.2 is that: the bottom of the guiding frustum 4.2 has a groove cavity 4.20, and the guiding frustum 4.2 is sleeved on the end head 1 through the groove cavity 4.20.

[0022] In order to balance the internal and external pressures of the pressing cylinder 4.1, the cylinder wall of the pressing cylinder 4.1 is a hollow structure, which can be specifically formed by opening ventilation openings on the cylinder wall.

[0023] As Figure 4As shown, the secondary assembly device 5 includes an upper and lower coaxially arranged pressure plate 5.1 and a second positioning cylinder 5.2, the end head 1 equipped with a retaining ring 3 is positioned in the second positioning cylinder 5.2, and the end cover 2 is coaxially arranged above the end head 1; a plurality of extrusion plates 5.0 are arranged in a circular array around the retaining ring 3, and the extrusion plate 5.0 has an extrusion drive part 5.3 and an elastic support foot 5.4, and the elastic support foot 5.4 is arranged on a guide rail 5.5. The extrusion plate 5.0 is driven forward by the extrusion drive part 5.3 to radially extrude the retaining ring 3 to shrink it to be hidden in the end head outer groove 10, and the extrusion plate 5.0 is elastically lifted and lowered by supporting the elastic support foot 5.4. After the assembly of the end head 1 and the snap ring 3 is completed, the end cover 2 needs to be assembled next. First, the end head 1 is placed in the second positioning cylinder 5.2, and then the extrusion drive unit 5.3 is used to provide a driving force to move the extrusion plate 5.0 forward to radially extrude the snap ring 3, so that the radial size of the snap ring 3 is reduced until it is hidden in the end head outer groove 10. At this time, the pressing plate 5.1 presses down the end cover 2. When the end cover 2 contacts the extrusion plate 5.0, the extrusion plate 5.0 is pressed down and moves downward. When the extrusion plate 5.0 moves down to completely break away from the extrusion state of the snap ring 3, At this time, the inner groove 20 of the end cover has not reached the position of the snap ring 3, and the current extrusion shape of the snap ring 3 is maintained by the inner wall of the end cover 2. The extrusion drive unit 5.3 drives the extrusion plate 5.0 to move backward and reset, and the extrusion plate 5.0 completely breaks away from the contact with the end cover 2, and the end cover 2 continues to move downward. When the inner groove 20 of the end cover reaches the position of the snap ring 3, the extrusion of the snap ring 3 is released, and the snap ring 3 immediately rebounds and snaps into the inner groove 20 of the end cover, thereby realizing the axial limiting assembly of the end head 1 and the end cover 2 through the snap ring 3, and completing the final assembly of the snap ring assembly.

[0024] It is worth noting that in order to avoid damage to the clamping ring 3 during the extrusion process, the extrusion end of the extrusion plate 5.0 is in an arc structure.

[0025] like Figure 4 As shown, the extrusion plate 5.0 has a plate seat 5.7, the elastic support foot 5.4 is located on the slider 5.6 of the guide rail 5.5, and the extrusion plate 5.0 is connected to the elastic support foot 5.4 through the plate seat 5.7. The elastic support foot 5.4 includes a support column 5.41, a spring 5.42 sleeved on the support column 5.41, and the spring 5.42 is elastically compressed and arranged between the plate seat 5.7 and the slider 5.6. Preferably, the extrusion drive unit 5.3 of the utility model is a horizontally arranged screw push-pull mechanism.

[0026] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A snap ring assembly system for coaxial assembly of the end head (1), end cap (2) and snap ring (3) of a snap ring assembly. The snap ring (3) is snapped into the snap cavity formed between the outer groove (10) of the end head and the inner groove (20) of the end cap to achieve axial limit assembly with the end head (1) and the end cap (2). It is characterized in that: The assembly system includes a primary assembly device (4) and a secondary assembly device (5). The primary assembly device (4) axially presses the snap ring (3) into the outer groove (10) of the end head (1) by expanding the radial dimension of the snap ring. The secondary assembly device (5) radially squeezes the snap ring (3) to reduce its radial dimension, so that the snap ring (3) rebounds and restores to snap into the inner groove (20) of the end cap (2) when the squeezing force is removed.

2. The snap ring component assembly system according to claim 1, characterized in that: The primary assembly device (4) includes a pressing cylinder (4.1), a guiding frustum (4.2) and a first positioning cylinder (4.3) coaxially arranged from top to bottom. The end head (1) is positioned within the first positioning cylinder (4.3). The guiding frustum (4.2) is arranged on the top of the end head (1). The pressing cylinder (4.1) presses down the snap ring (3) sleeved on the guiding frustum (4.2), so that the snap ring (3) slides down along the guiding frustum (4.2) to expand its radial dimension and snap into the outer groove (10) of the end head (1).

3. The snap ring assembly system according to claim 2, characterized in that: The bottom of the guiding frustum (4.2) has a groove cavity (4.20), and the guiding frustum (4.2) is sleeved on the end head (1) through the groove cavity (4.20).

4. A snap ring assembly system according to claim 2, characterized in that: The barrel wall of the pressing cylinder (4.1) is of a hollow structure.

5. The snap ring assembly system according to claim 2, wherein: The secondary assembly device (5) includes a pressing plate (5.1) and a second positioning cylinder (5.2) coaxially arranged up and down. The end head (1) assembled with the snap ring (3) is positioned within the second positioning cylinder (5.2). The end cap (2) is coaxially arranged above the end head (1). A plurality of extrusion plates (5.0) are arranged in a circumferential array around the snap ring (3). The extrusion plate (5.0) has an extrusion driving part (5.3) and an elastic support leg (5.4). The elastic support leg (5.4) is arranged on a guiding slide rail (5.5). The extrusion plate (5.0) is driven to move forward by the extrusion driving part (5.3) to radially squeeze the snap ring (3) to shrink and hide within the outer groove (10) of the end head. The extrusion plate (5.0) is elastically lifted and supported by the elastic support leg (5.4).

6. The snap ring assembly system according to claim 5, characterized in that: The extrusion end of the extrusion plate (5.0) is in an arc structure.

7. The snap ring assembly system according to claim 6, wherein: The extrusion plate (5.0) has a plate seat (5.7). The elastic support leg (5.4) is located on a slider (5.6) of the guiding slide rail (5.5). The extrusion plate (5.0) is connected to the elastic support leg (5.4) through the plate seat (5.7).

8. A snap ring assembly system according to claim 7, wherein: The extrusion driving part (5.3) is a horizontally arranged screw rod push-pull mechanism.

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