Dustproof hydraulic joint

Abstract

The utility model discloses a dustproof hydraulic connector which comprises a sleeve seat, a mandrel, a mounting bearing, a backing ring and a gland. The sleeve seat is provided with an assembling groove, and a rotating seat fixedly connected with the bottom of the mandrel is installed in the assembling groove. An outer-layer step groove A is formed above the assembling groove, an inner-layer step groove A is formed in the rotating seat, the bearing outer ring is embedded in the outer-layer step groove A, and the inner ring is embedded in the inner-layer step groove A. An outer-layer step groove B is formed above the outer-layer step groove A, an inner-layer step groove B is formed above the inner-layer step groove A, the backing ring is nested in the inner-layer step groove B and abuts against the bearing inner ring, the gland is fixed to the top of the sleeve seat, and the pressing ring below the gland is nested in the outer-layer step groove B and abuts against the bearing outer ring. The structure has dustproof, sealing and rotating performances, is suitable for a hydraulic system under complex working conditions, and obviously improves the efficiency and reliability of equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic joints, and particularly relates to a dust-proof hydraulic joint. Background Art

[0002] In a hydraulic system, a hydraulic joint, as an important component for connecting hydraulic pipelines, plays a key role in the stable transmission of hydraulic oil. In actual applications, existing hydraulic joints often face some problems. For example, rotating components in the hydraulic system are prone to being eroded by external dust and pollutants due to long-term operation, resulting in increased wear of the joints, and further affecting the sealing performance and working efficiency of the hydraulic system. Especially in harsh working environments, such as mines, construction sites or farm operations, impurities such as dust and sediment are likely to enter the hydraulic system, causing pollution of the hydraulic oil inside the joints, thereby affecting the service life and stability of hydraulic equipment. In addition, the sealing design of traditional hydraulic joints is often insufficient, and hydraulic oil may leak at the rotating parts of the joints, affecting the efficiency and safety of hydraulic transmission.

[0003] To solve the above problems, the design of a dust-proof hydraulic joint should have high sealing performance while maintaining good rotational performance to prevent external dust and impurities from entering the system and avoid leakage of hydraulic oil. However, some hydraulic joints in the prior art often have difficulty in simultaneously achieving flexibility in rotation and reliability in sealing, resulting in a shortened service life of the system and an increased maintenance frequency. Therefore, it is of great practical significance to develop a hydraulic joint that can operate stably in complex environments and has a dust-proof function and good sealing performance. Summary of the Utility Model

[0004] Aiming at the above deficiencies existing in the prior art, the purpose of the utility model is to provide a dust-proof hydraulic joint, which takes into account dust prevention, sealing and rotational performance, is applicable to hydraulic systems under various complex working conditions, and can significantly improve the use efficiency and reliability of equipment.

[0005] The technical solution adopted by the utility model to achieve the above purpose is: a dust-proof hydraulic joint, including a matching set of a socket, a mandrel, a mounting bearing, a gasket ring, and a gland. An assembly groove is provided in the socket. A rotating seat is fixedly connected to the bottom of the mandrel and is rotatably installed in the assembly groove. An outer layer step groove A is provided above the assembly groove, and an inner layer step groove A is provided on the rotating seat. The outer ring of the mounting bearing is nested in the outer layer step groove A, and the inner ring of the mounting bearing is nested in the inner layer step groove A.

[0006] Above the outer stepped groove A, there is an outer stepped groove B. Above the inner stepped groove A, there is an inner stepped groove B. The gasket ring is nested in the inner stepped groove B and abuts against the end face of the inner ring of the bearing. The gland is fixedly connected to the top of the socket and arranged around the mandrel. A pressure ring nested in the outer stepped groove B is fixedly connected to the lower surface of the gland, and the pressure ring abuts against the end face of the outer ring of the bearing.

[0007] In some embodiments, to ensure that the socket and the mandrel can be respectively connected to the hydraulic pipes at the corresponding ends and achieve stable transmission of hydraulic oil, the following technical solutions are provided.

[0008] A connecting pipe is fixedly connected to the bottom of the socket. The connecting pipe is in communication with the assembly groove. A transition through groove is provided at the connection between the connecting pipe and the assembly groove. A communication hole is provided at the axis of the mandrel, and the inner diameter of the communication hole is equal to the inner diameter of the connecting pipe.

[0009] In some embodiments, to ensure that the gland and the pressure ring thereon can be fixedly combined with the socket to keep them running synchronously, and to ensure that the gasket ring can be nested and combined with the mandrel, the following technical solutions are provided.

[0010] Outer clamping keys are uniformly fixedly connected to the inner wall of the outer stepped groove B. Outer clamping grooves that are nested and fitted with the outer clamping keys are provided on the outer wall of the pressure ring. A connecting ring that is in close contact with the gland is fixedly connected to the outer edge of the top of the socket. The connecting ring and the gland are fixedly connected by a bolt assembly.

[0011] Inner clamping keys are fixedly connected to the inner wall of the inner stepped groove B. Inner clamping grooves that are nested and fitted with the inner clamping keys are provided on the inner wall of the gasket ring.

[0012] In some embodiments, to ensure the sealing effect of the connection between the gland and the mandrel and the socket, and to prevent external dust from entering and affecting the cleanliness of the transmitted hydraulic oil, the following technical solutions are provided.

[0013] A sealing rubber ring is nested and installed between the connecting ring and the gland. A ring seat that is turned up is fixedly connected to the inner edge of the gland. A dust-proof ring A is nested and installed between the ring seat and the mandrel. A dust-proof ring B is nested and installed between the gland and the gasket ring.

[0014] In some embodiments, to prevent the transmitted hydraulic oil from leaking from the gap between the rotating seat and the assembly groove, the following technical solutions are provided.

[0015] A support ring is nested and installed between the inner side wall of the assembly groove and the inner side wall of the rotating seat. An oil seal ring is nested and installed between the bottom wall of the assembly groove and the bottom wall of the rotating seat.

[0016] The beneficial effects of the present utility model:

[0017] 1. High dust-proof performance: By setting a sealing rubber ring between the gland and the connecting ring, and nesting dust-proof rings A and B between the gland, the mandrel and the spacer ring, a double dust-proof effect is achieved. This effectively prevents external dust and impurities from entering the interior through the rotating parts of the joint, ensures the cleanliness of the hydraulic oil, and extends the service life of the hydraulic system.

[0018] 2. Stable rotational connection: The hydraulic joint achieves stable rotation of the mandrel and the socket by installing bearings. The outer and inner rings of the bearings are interference-fitted with the outer and inner stepped grooves respectively, and at the same time, they are in close contact with the bearing end faces through the retaining ring and the spacer ring, ensuring the free and stable rotation of the mandrel in the socket. The clearance fit between the rotating seat and the assembly groove and the supporting ring provided further improve the rotational flexibility, effectively solving the problem of easy wear of traditional joints after long-term use.

[0019] 3. Excellent sealing performance: By setting an oil seal ring at the connection part between the assembly groove and the rotating seat, the leakage problem of hydraulic oil at the rotating part of the joint is further avoided. The combined use of the sealing rubber ring and the dust-proof ring not only ensures the overall sealing performance of the joint, but also effectively prevents the hydraulic oil from being contaminated by the outside during operation, thus improving the safety and working efficiency of the hydraulic system.

[0020] 4. Extend the service life of the equipment: Through the double-layer sealing design and dust-proof structure inside and outside the joint, not only the purity of the hydraulic oil is ensured, but also the equipment wear caused by the intrusion of impurities is reduced. Combined with the design to prevent hydraulic oil leakage, the maintenance cost of the equipment is effectively reduced, and the use reliability and life of the system are improved.

[0021] Generally speaking, this dust-proof hydraulic joint takes into account dust-proof, sealing and rotational performance, is suitable for hydraulic systems under various complex working conditions, and can significantly improve the use efficiency and reliability of the equipment. Description of the Drawings

[0022] Figure 1 is a schematic structural diagram of the present utility model;

[0023] Figure 2 is a schematic internal structural diagram of the present utility model;

[0024] Figure 3 is a schematic structural diagram of the disassembled state of the mandrel and the spacer ring;

[0025] Figure 4 is a schematic structural diagram of the socket;

[0026] Figure 5 is a schematic structural diagram of the gland.

[0027] In the figure: 1 socket, 11 assembly groove, 12 outer stepped groove A, 13 outer stepped groove B, 14 connecting pipe, 15 transition through groove, 16 outer clamping key, 17 connecting ring, 2 mandrel, 21 rotating seat, 22 inner stepped groove A, 23 inner stepped groove B, 24 communication hole, 25 inner clamping key, 31 bearing outer ring, 32 bearing inner ring, 4 spacer ring, 41 inner clamping groove, 5 gland, 51 pressure ring, 52 outer clamping groove, 53 bolt assembly, 54 ring seat, 61 sealing rubber ring, 62 dust-proof ring A, 63 dust-proof ring B, 64 support ring, 65 oil seal ring. Specific embodiments

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0029] Please refer to Figures 1-5 , a dust-proof hydraulic joint, including a matching combination of a socket 1, a mandrel 2, a mounting bearing, a spacer ring 4, and a gland 5. An assembly groove 11 is provided in the socket 1. A rotating seat 21 fixedly connected to the bottom of the mandrel 2 is rotatably mounted in the assembly groove 11. An outer stepped groove A12 is provided above the assembly groove 11. An inner stepped groove A22 is provided on the rotating seat 21. The bearing outer ring 31 of the mounting bearing is nested in the outer stepped groove A12, and the bearing inner ring 32 of the mounting bearing is nested in the inner stepped groove A22.

[0030] An outer stepped groove B13 is provided above the outer stepped groove A12, and an inner stepped groove B23 is provided above the inner stepped groove A22. The spacer ring 4 is nested in the inner stepped groove B23 and abuts against the end face of the bearing inner ring 32. The gland 5 is fixedly connected to the top of the socket 1 and is arranged around the mandrel 2. A pressure ring 51 nested in the outer stepped groove B13 is fixedly connected to the lower surface of the gland 5, and the pressure ring 51 abuts against the end face of the bearing outer ring 31.

[0031] The rotating seat 21 and the assembly groove 11 are in clearance fit to ensure that the mandrel 2 can rotate freely in the socket 1. The bearing outer ring 31 and the outer stepped groove A12 are in interference fit, and the bearing inner ring 32 and the inner stepped groove A22 are in interference fit. The bottom end faces of the bearing outer ring 31 and the bearing inner ring 32 are in close contact with the bottom surfaces of the outer stepped groove A12 and the inner stepped groove A22, respectively. The top end faces of the bearing outer ring 31 and the bearing inner ring 32 are in close contact with the spacer ring 4 and the pressure ring 51, respectively. The gland 5 and the pressure ring 51 thereon are in close contact with the top end face of the socket 1 and the outer stepped groove B13, respectively. The spacer ring 4 is in close contact with the inner stepped groove B23. The spacer ring 4 and the gland 5 and the pressure ring 51 are in clearance fit.

[0032] Through the above settings, it can ensure that the mandrel 2 and the socket 1 achieve a stable rotational connection under the positioning action of the mounting bearing, and the mandrel 2 and the socket 1 can be stably combined through the gland 5 and the spacer ring 4.

[0033] To ensure that the socket 1 and the mandrel 2 can be respectively connected to the hydraulic pipes at the corresponding ends and achieve stable transmission of hydraulic oil, the following technical solutions are provided for this.

[0034] A connecting pipe 14 is fixedly connected to the bottom of the socket 1. The connecting pipe 14 is kept in communication with the assembly groove 11. A transition through groove 15 is provided at the connection between the connecting pipe 14 and the assembly groove 11. A communication hole 24 is opened at the axis of the mandrel 2, and the inner diameter of the communication hole 24 is equal to the inner diameter of the connecting pipe 14.

[0035] The connecting pipe 14 can be connected to the hydraulic pipe at the corresponding end, and the top end of the mandrel 2 can be connected to the other hydraulic pipe at the corresponding end to ensure stable transmission of hydraulic oil in the connecting pipe 14, the transition through groove 15, and the communication hole 24, and to ensure that the mandrel 2 can rotate integrally.

[0036] Since the inner diameter of the assembly groove 11 is larger than the inner diameter of the connecting pipe 14, the transition through groove 15 is provided to ensure the connection between the connecting pipe 14 and the assembly groove 11.

[0037] To ensure that the gland 5 and the pressing ring 51 thereon can be fixedly combined with the socket 1 to keep them running synchronously, and to ensure that the spacer ring 4 can be nested and combined with the mandrel 2, the following technical solutions are provided for this.

[0038] Outer clamping keys 16 are uniformly fixedly connected to the inner wall of the outer stepped groove B13. Outer clamping grooves 52 that are nested and fitted with the outer clamping keys 16 are opened on the outer wall of the pressing ring 51. A connecting ring 17 that is kept in contact with the gland 5 is fixedly connected to the outer edge of the top of the socket 1. The connecting ring 17 and the gland 5 are fixedly connected by a bolt assembly 53.

[0039] Inner clamping keys 25 are fixedly connected to the inner wall of the inner stepped groove B23. Inner clamping grooves 41 that are nested and fitted with the inner clamping keys 25 are opened on the inner wall of the spacer ring 4.

[0040] Through the nested combination of the outer clamping keys 16 and the outer clamping grooves 52, it can be ensured that the gland 5 and the socket 1 are fixedly combined and rotate synchronously, and through the nested combination of the inner clamping keys 25 and the outer clamping keys 16, it can be ensured that the mandrel 2 and the spacer ring 4 are fixedly combined and rotate synchronously.

[0041] To ensure the sealing effect of the connection between the gland 5 and the mandrel 2 and the core seat, and to prevent external dust from invading the inside and affecting the cleanliness of the transmitted hydraulic oil, the following technical solutions are provided for this.

[0042] A sealing rubber ring 61 is nested and installed between the connecting ring 17 and the gland 5. A ring seat 54 that is turned up is fixedly connected to the inner edge of the gland 5. A dust-proof ring A62 is nested and installed between the ring seat 54 and the mandrel 2. A dust-proof ring B63 is nested and installed between the gland 5 and the spacer ring 4.

[0043] The sealing rubber ring 61 can ensure the sealing effect at the connection position between the gland 5 and the connecting ring 17. The combination of the dust-proof ring A 62 and the dust-proof ring B 63 can provide a double-layer dust-proof effect, effectively preventing external dust from invading through the gaps between the gland 5, the mandrel 2, and the spacer ring 4 to contaminate the hydraulic oil.

[0044] To prevent the transmitted hydraulic oil from leaking through the gap between the rotating seat 21 and the assembly groove 11, the following technical solution is provided.

[0045] A support ring 64 is nested and installed between the inner side walls of the assembly groove 11 and the rotating seat 21, and an oil seal ring 65 is nested and installed between the bottom walls of the assembly groove 11 and the rotating seat 21.

[0046] The support ring 64 can stably support the socket 1 and the mandrel 2 to ensure the concentricity of the assembly of the mandrel 2 and the core seat. The setting of the oil seal ring 65 can effectively prevent the hydraulic oil from leaking through the gap between the rotating seat 21 and the assembly groove 11.

[0047] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present utility model, the present utility model can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0048] In addition, it should be understood that although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A dustproof hydraulic joint, characterized in that: The invention comprises a sleeve (1), a core shaft (2), a mounting bearing, a gasket (4) and a pressure cover (5) in a matching combination, wherein the sleeve (1) is provided with a mounting groove (11), the bottom of the core shaft (2) is fixedly connected with a rotating seat (21) which is rotatably mounted in the mounting groove (11), an outer step groove A (12) is provided above the mounting groove (11), an inner step groove A (22) is provided on the rotating seat (21), an outer ring (31) of the mounting bearing is nested in the outer step groove A (12), and an inner ring (32) of the mounting bearing is nested in the inner step groove A (22); An outer step groove B (13) is provided above the outer step groove A (12), and an inner step groove B (23) is provided above the inner step groove A (22). The gasket (4) is nested in the inner step groove B (23) and is kept in contact with the end face of the bearing inner ring (32). The pressure cover (5) is fixedly connected to the top of the sleeve (1) and arranged on the periphery of the core shaft (2). A pressure ring (51) is fixedly connected to the lower surface of the pressure cover (5) and is nested in the outer step groove B (13). The pressure ring (51) is kept in contact with the end face of the bearing outer ring (31).

2. A dustproof hydraulic joint according to claim 1, characterized in that: A connecting pipe (14) is fixedly connected to the bottom of the sleeve (1), the connecting pipe (14) and the assembly groove (11) are kept in communication, a transition groove (15) is provided at the connection between the connecting pipe (14) and the assembly groove (11), a connecting hole (24) is opened at the axis center of the core shaft (2), and the inner diameter of the connecting hole (24) is equal to the inner diameter of the connecting pipe (14).

3. A dustproof hydraulic joint according to claim 1, characterized in that: The inner wall of the outer step groove B (13) is evenly fixed with an external key (16); the outer wall of the pressure ring (51) is provided with an external groove (52) which is nested and matched with the external key (16); the top outer edge of the sleeve (1) is fixed with a connecting ring (17) which is kept in close contact with the pressure cover (5); the connecting ring (17) and the pressure cover (5) are fixedly connected by a bolt assembly (53); An inner key (25) is fixedly connected to the inner wall of the inner step groove B (23), and an inner groove (41) which is nested and matched with the inner key (25) is opened on the inner wall of the gasket ring (4).

4. A dustproof hydraulic joint according to claim 3, characterized in that: A sealing rubber ring (61) is nested between the connecting ring (17) and the pressure cover (5), an upturned ring seat (54) is fixed to the inner edge of the pressure cover (5), a dustproof ring A (62) is nested between the ring seat (54) and the core shaft (2), and a dustproof ring B (63) is nested between the pressure cover (5) and the gasket (4).

5. The dustproof hydraulic joint according to claim 1, characterized in that: A support ring (64) is nested between the inner side wall of the assembly groove (11) and the inner side wall of the rotating seat (21), and an oil seal ring (65) is nested between the bottom wall of the assembly groove (11) and the bottom wall of the rotating seat (21).

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