Sealed universal joint

Abstract

The utility model discloses a sealed universal joint, and belongs to the technical field of universal joints. The device comprises a water inlet connector, a swing connector, a sealing ring, a clamping ring and a clamping spring. A ball head and a water inlet through hole penetrating through the ball head are arranged at the top of the water inlet connector, a water outlet through hole is formed in the swing connector, and after the ball head is inserted into the water outlet through hole, sealing is achieved through a sealing ring in a sealing ring groove. The upper groove wall of the sealing ring groove extends to form an inner abutting ring, the bottom of a clamped clamping ring abuts against the sealing ring, and the top of the clamping ring limits upward movement of the ball head through an upper abutting end face. The lower groove wall of the sealing ring groove extends to form a locking ring, a clamping spring is installed in an inner ring hole, and the lower abutting end face of the clamping spring limits downward movement of the ball head to form up-down double dynamic sealing. Through the synergistic effect of the clamping ring and the clamping spring, axial displacement of the ball head is effectively prevented, the sealing performance is improved, and the ball joint is suitable for different pipeline systems, simple in structure and convenient and fast to install.

Description

Technical Field

[0001] This utility model belongs to the field of universal joint technology, and specifically refers to a sealed universal joint. Background Technology

[0002] Currently, universal joints, as core connecting components in piping systems and hydraulic transmission, mainly consist of ball joints, swing joints, and sealing components located within the swing joint. By having the ball joint, which extends into the swing joint, abut against the sealing ring, a sealing state is maintained even during rotation.

[0003] However, when the ball joint is connected to the swing joint, there is axial movement. During use, the ball joint is prone to gaps at the contact point with the sealing ring due to this axial movement, which can easily lead to water leakage. Utility Model Content

[0004] The purpose of this invention is to provide a sealed universal joint that is not only easy to install, but also effectively prevents axial movement of the ball head during use, thus greatly improving the sealing performance.

[0005] The purpose of this utility model is achieved as follows:

[0006] A sealed universal joint includes an inlet connector with a ball head formed on the top, a swing connector, and a sealing ring. The inlet connector has an inlet hole that passes through the ball head, and the swing connector has an outlet hole that communicates with the upper and lower parts. The ball head is inserted into the outlet hole. The inner wall of the outlet hole has a sealing ring groove for the sealing ring to be fitted and installed. The upper wall of the sealing ring groove extends upward and forms an inner abutment ring located on the inner wall of the outlet hole. A retaining ring is engaged in the inner abutment ring. The bottom of the retaining ring abuts against the upper end face of the sealing ring. The end of the retaining ring facing the ball head has an upper abutment end face that abuts against the side wall of the ball head. The lower wall of the sealing ring groove extends inward and forms a locking ring. The locking ring has an inner ring hole for the ball head to pass through. A retaining spring abuts against the inner wall of the inner ring hole. The upper end face of the retaining spring abuts against the lower end face of the sealing ring. The inner wall of the retaining spring has a lower abutment end face that abuts against the side wall of the ball head.

[0007] The present invention is further configured such that the inner wall of the inner abutment ring is provided with a limiting ring groove, and the outer wall of the snap ring is provided with a plurality of limiting barbs embedded in the limiting ring groove.

[0008] The present invention is further configured such that the upper end of the retaining spring is provided with a plurality of elastic grooves corresponding to the limiting barbs.

[0009] The present invention is further configured such that the outer wall of the swing joint or the inner wall of the water outlet hole is provided with an installation thread.

[0010] The present invention is further configured such that the retaining ring is a C-shaped open elastic ring.

[0011] The outstanding and beneficial technical effects of this utility model compared to the prior art are:

[0012] 1. The universal joint provided by this utility model, after the ball head is axially installed, forms a double dynamic seal through the retaining ring and retaining spring, which makes it less likely to shift axially during use, and allows the side wall of the ball head to maintain good contact with the sealing ring, thereby effectively preventing water leakage; at the same time, this structure is convenient and labor-saving to install.

[0013] 2. This utility model further uses a limiting barb in conjunction with a limiting ring groove to effectively fix the retaining ring, preventing it from coming off vertically and ensuring the normal rotation of the ball head.

[0014] 3. The elastic groove further provided in this utility model can provide elastic space for the limiting barb embedded in the limiting ring groove, ensuring that the limiting barb can deform within a reasonable range.

[0015] 4. This utility model further improves the design of the outer and inner wall threads to adapt to pipeline systems of different standards. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a cross-sectional schematic diagram of the present invention;

[0018] Figure 3 This is an exploded view of the present invention;

[0019] Figure 4 This is a schematic diagram of another embodiment of the present invention;

[0020] Figure label:

[0021] 1-Ball head; 10-Water inlet hole;

[0022] 2-Water inlet connector;

[0023] 3-Swing joint; 30-Water outlet hole; 31-Sealing ring groove; 32-Inner abutment ring; 320-Limiting ring groove; 33-Locking ring; 34-Inner ring hole; 35-Installation thread;

[0024] 4-Sealing ring;

[0025] 5-Clamping ring; 50-Upper abutment face;

[0026] 6-Snap ring; 60-Lower abutment end face; 61-Limiting barb; 62-Elastic groove. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. See also: Figure 1 — Figure 4 :

[0028] A sealed universal joint includes an inlet connector 2 with a ball head 1 formed on the top, a swing connector 3, and a sealing ring 4. The inlet connector 2 has an inlet / outlet hole 10 penetrating the ball head 1. The swing connector 3 has an outlet hole 30 that communicates with the upper and lower parts of the ball head 1. The ball head 1 is inserted into the outlet hole 30. A sealing ring groove 31 for the sealing ring 4 is formed on the inner wall of the outlet hole 30. The upper wall of the sealing ring groove 31 extends upward and forms an inner abutment ring 32 located on the inner wall of the outlet hole 30. A retaining ring 5 is snapped into the ring 32. The bottom of the retaining ring 5 abuts against the upper end face of the sealing ring 4. The end of the retaining ring 5 facing the ball head 1 is formed with an upper abutting end face 50 that abuts against the side wall of the ball head 1. The lower groove wall of the sealing ring groove 31 extends inward and forms a locking ring 33. The locking ring 33 has an inner ring hole 34 for the ball head 1 to pass through. The inner wall of the inner ring hole 34 abuts against a retaining spring 6. The upper end face of the retaining spring 6 abuts against the lower end face of the sealing ring 4. The inner wall of the retaining spring 6 is provided with a lower abutting end face 60 that abuts against the side wall of the ball head 1.

[0029] The specific installation process for this connector is as follows:

[0030] The sealing ring 4 is pre-installed into the sealing ring groove 31. The ball head above the water inlet connector 2 is inserted into the inner ring hole 34. After insertion, the retaining ring 6 is installed so that the lower abutting end face 60 on the retaining ring 6 can abut against the lower side wall of the ball head 1, so that the ball head can no longer move downward from the inner ring hole 34.

[0031] The retaining ring 5 is then installed inside the inner abutment ring 32 by snap-fit. After installation, the retaining ring can abut against the upper side wall of the ball head using the upper abutment end face 50, making it difficult for the ball head to move in the axial upward direction.

[0032] The double dynamic seal at the top and bottom prevents the ball head from shifting axially during use, and ensures that the sealing ring always remains against the side wall of the ball head, guaranteeing a good sealing effect.

[0033] Preferably, the inner wall of the inner abutment ring 32 is provided with a limiting ring groove 320, and the outer wall of the snap ring 6 is provided with a plurality of limiting barbs 61 embedded in the limiting ring groove 320.

[0034] Preferably, the upper end of the retaining spring 6 is provided with a plurality of elastic grooves 62 corresponding to the limiting barb 61.

[0035] In the above structure, one side of the limiting barb 61 is provided with an inclined surface, which facilitates the downward movement of the retaining spring, allowing the limiting barb 61 to be easily embedded in the limiting ring groove 320. In addition, since the limiting barb 61 needs to undergo displacement in the radial direction, i.e., a certain deformation, in order to be embedded in the limiting ring groove 320, the provided elastic groove 62 can provide sufficient deformation space, making it convenient for the user to effectively install the retaining spring.

[0036] Preferably, the outer wall of the swing joint 3 or the inner wall of the water outlet hole 30 is provided with an installation thread 35.

[0037] In the above structure, the provided mounting thread 35 can be used in two mounting forms, and as follows: Figure 4 As shown, this is to adapt to piping systems of different standards.

[0038] Preferably, the retaining ring 6 is a C-shaped open elastic ring.

[0039] It is worth mentioning that the C-shaped structure is designed to abut against the inner edge of the inner ring hole 34. The notch design during the abutment process allows it to deform, making installation easier.

[0040] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. A sealed universal joint, comprising a water inlet connector (2) with a ball head (1) formed on the top, a swing connector (3), and a sealing ring (4), wherein the water inlet connector (2) has a water inlet hole (10) penetrating the ball head (1), and the swing connector (3) has a water outlet hole (30) communicating vertically, characterized in that, The ball head (1) is inserted into the water outlet hole (30). The inner wall of the water outlet hole (30) is provided with a sealing ring groove (31) for the sealing ring (4) to be fitted and installed. The upper groove wall of the sealing ring groove (31) extends upward and forms an inner abutment ring (32) located on the inner wall of the water outlet hole (30). A retaining ring (5) is snapped into the inner abutment ring (32). The bottom of the retaining ring (5) abuts against the upper end face of the sealing ring (4). The end of the retaining ring (5) facing the ball head (1) is formed. There is an upper abutting end face (50) that abuts against the side wall of the ball head (1). The lower groove wall of the sealing ring groove (31) extends inward and forms a locking ring (33). The locking ring (33) has an inner ring hole (34) for the ball head (1) to pass through. The inner wall of the inner ring hole (34) abuts against a snap ring (6). The upper end face of the snap ring (6) abuts against the lower end face of the sealing ring (4). The inner wall of the snap ring (6) is provided with a lower abutting end face (60) that abuts against the side wall of the ball head (1).

2. A sealed universal joint as in claim 1, wherein The inner wall of the inner abutment ring (32) is provided with a limiting ring groove (320), and the outer wall of the snap ring (6) is provided with a plurality of limiting barbs (61) embedded in the limiting ring groove (320).

3. A sealed universal joint as in claim 2, wherein, The upper end of the snap ring (6) is provided with several elastic grooves (62) corresponding to the limiting barb (61).

4. A sealed universal joint as in claim 1, wherein, The outer wall of the swing joint (3) or the inner wall of the water outlet hole (30) is provided with an installation thread (35).

5. A sealed universal joint as in claim 1, wherein, The retaining ring (6) is a C-shaped open elastic ring.

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