Crane supporting leg oil cylinder rod sealing system

Abstract

The utility model relates to a crane supporting leg oil cylinder rod sealing system which comprises a main seal, an auxiliary seal and an auxiliary seal. The buffering seal is located on the side, close to the oil cylinder bottom, of the main seal and is matched with the side wall of the oil cylinder body; the dustproof ring is located on the side, away from the buffering seal, of the main seal and installed on the side wall of the oil cylinder body in a matched mode, and the dustproof ring comprises a matching part and a sealing part, the dustproof lip part is fixedly connected with the matching part and abuts against the peripheral side wall of the oil cylinder rod; the sealing lip part is fixedly connected with the matching part, the sealing lip part is located on the side, away from the bottom of the oil cylinder, of the dustproof lip part, and the sealing lip part abuts against the peripheral side of the oil cylinder rod; the section of the supporting framework is in an inverted-L shape, and the supporting framework is fixedly connected with the side, away from the oil cylinder rod, of the matching part. Due to the arrangement of the supporting framework, the dustproof ring is not prone to shrinkage due to low air temperature, and the dustproof performance is not greatly reduced.

Description

Technical Field

[0001] The present application relates to the technical field of cranes, and in particular to a sealing system for a crane outrigger oil cylinder rod. Background Art

[0002] A crane is a multi-action lifting machine that can lift and carry heavy objects vertically and horizontally within a certain range. It is also called an overhead crane, an overhead crane, or a crane. The outrigger is one of the main components of a truck crane. It is used to increase the support base of the crane, reduce the burden on the tires, and improve the anti-overturning stability of the vehicle, thereby increasing the lifting capacity. The outrigger cylinder is a supporting device installed on the chassis of the crane, including a fixed cylinder body and a movable and extending cylinder rod. During the operation of the outrigger cylinder, the sealing system of the outrigger cylinder rod is crucial.

[0003] In related technologies, such as Figure 1 As shown, a crane outrigger oil cylinder rod sealing system is proposed, which includes a step seal buffer 400, a polyurethane Y-type main seal 500 and a polyurethane dust ring 600 which are sequentially arranged away from the bottom of the oil cylinder.

[0004] The above-mentioned related technologies have the following defects: in relatively cold areas, due to the very low temperature, the polyurethane dust ring will shrink due to the material itself, and the clamping force on the cylinder rod will decrease, thereby greatly reducing the dustproof performance of the polyurethane dust ring. Utility Model Content

[0005] In order to improve the problem that the polyurethane dustproof ring shrinks due to low temperature and its dustproof performance is greatly reduced, the present application provides a crane outrigger cylinder rod sealing system.

[0006] The present application provides a crane outrigger oil cylinder rod sealing system, which adopts the following technical solution:

[0007] A crane outrigger oil cylinder rod sealing system, comprising:

[0008] The main seal is installed in coordination with the side wall of the cylinder body;

[0009] The buffer seal is located on the side of the main seal close to the bottom of the oil cylinder and is installed in conjunction with the side wall of the oil cylinder body;

[0010] The dust ring is located on the side of the main seal away from the buffer seal and is installed in cooperation with the side wall of the cylinder body. The dust ring includes:

[0011] A matching part, which is matched and installed with the cylinder body of the oil cylinder;

[0012] The dustproof lip is fixedly connected to the mating portion and abuts against the peripheral side wall of the cylinder rod;

[0013] A sealing lip portion is fixedly connected to the matching portion, and the sealing lip portion is located on a side of the dustproof lip portion away from the bottom of the oil cylinder, and the sealing lip portion contacts the peripheral side of the oil cylinder rod;

[0014] The supporting frame has a "┐"-shaped cross section and is fixedly connected to the side of the mating part away from the cylinder rod.

[0015] Furthermore, the free ends of the dustproof lip and the sealing lip are spaced apart to form a dustproof lip, and the bottom of the dustproof lip is arranged as a curved surface.

[0016] Furthermore, the primary seal comprises:

[0017] Connecting piece, installed in coordination with the cylinder body;

[0018] O-ring, the connecting piece is provided with a receiving groove for receiving the O-ring.

[0019] Furthermore, the elasticity of the connecting piece is smaller than that of the O-ring.

[0020] Furthermore, the bottom of the accommodating groove is configured to be arc-shaped.

[0021] Furthermore, the buffer seal comprises:

[0022] The sealing body is installed in cooperation with the side wall of the cylinder body of the oil cylinder;

[0023] The retaining ring is connected to the root of the sealing body and is arranged close to the cylinder rod.

[0024] Furthermore, a buffer groove is provided on one side of the sealing body close to the bottom of the oil cylinder.

[0025] In summary, the beneficial technical effect of the present application is that the setting of the supporting frame makes it difficult for the dustproof ring to shrink due to low temperature and the dustproof performance to be greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a related technical drawing;

[0027] Figure 2 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0028] Figure numerals: 100, main seal; 110, connecting piece; 111, receiving groove; 120, O-ring; 200, buffer seal; 210, seal body; 211, buffer groove; 212, give way groove; 220, retaining ring; 300, dustproof ring; 310, matching part; 311, receiving groove; 320, dustproof lip; 321, lip; 330, sealing lip; 340, supporting frame; 341, horizontal part; 342, vertical part; 400, step seal buffer; 500, polyurethane Y-type main seal; 600, polyurethane double dustproof ring. DETAILED DESCRIPTION

[0029] The technical solution of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0030] The present application embodiment discloses a crane outrigger oil cylinder rod sealing system. Figure 2 The sealing system includes a dust ring 300, a main seal 100 and a buffer seal 200 which are sequentially arranged in a direction close to the bottom of the cylinder.

[0031] The dustproof ring 300 includes a matching portion 310, a dustproof lip 320, a sealing lip 330 and a supporting frame 340. The matching portion 310 is matched and installed with the cylinder body side wall of the oil cylinder. The dustproof lip 320 is fixedly connected to the side of the matching portion 310 close to the oil cylinder rod and away from the oil cylinder bottom. The free end of the dustproof lip 320 extends obliquely in a direction close to the oil cylinder rod and away from the oil cylinder bottom, and the dustproof lip 320 contacts the side wall of the oil cylinder rod. In this embodiment, the dustproof lip 320 and the matching portion 310 are integrally formed.

[0032] The sealing lip 330 is fixedly connected to the side of the matching part 310 close to the cylinder rod, and the sealing lip 330 is arranged close to the bottom of the cylinder. The free end of the sealing lip 330 extends obliquely toward the cylinder rod and close to the bottom of the cylinder, and the free end of the sealing lip 330 contacts the side wall of the cylinder rod. In this embodiment, the sealing lip 330 and the matching part 310 are integrally formed. The obliquely arranged sealing lip 330 and the free ends of the dustproof lip 320 are arranged at intervals to form a dustproof lip 321, and the bottom of the dustproof lip 321 is rounded, so that a certain thickness of oil film can be retained while ensuring the dustproof ring 300 has the effect of scraping dust, thereby making the dustproof ring 300 not easily damaged.

[0033] In order to prevent the dustproof lip 320 and the matching part 310 from being torn at the connection position, the dustproof lip 320 and the matching part 310 are connected at an arc shape. A receiving groove 311 is provided on one side of the matching part 310 close to the bottom of the oil cylinder, and the bottom of the receiving groove 311 is arranged in an arc shape, so that the receiving groove 311 can provide sufficient deformation space for the dustproof ring 300, and the matching part 310 is not easy to crack at the bottom of the receiving groove 311 due to deformation.

[0034] The support frame 340 includes a horizontal portion 341 and a vertical portion 342 which are integrally formed, and the vertical portion 342 is perpendicular to the horizontal portion 341, so that the cross section of the support frame 340 is in a "┐" shape, the vertical portion 342 is fixedly connected to the side of the matching portion 310 away from the cylinder rod, the free end of the horizontal portion 341 extends toward the direction close to the cylinder rod and is inserted into the matching portion 310, and the horizontal portion 341 is fixedly connected to the matching portion 310. In this embodiment, the support frame 340 is a metal frame.

[0035] Reference Figure 1 and Figure 2 In colder areas, the temperature in winter will be very low, and the polyurethane Y-type main seal 500 in the related art will become hard and lose its elasticity, which will greatly reduce the sealing performance of the sealing system. The outrigger oil cylinder also has a large lateral load, which makes the polyurethane Y-type main seal 500's clamping force on the oil cylinder rod uneven. Therefore, the main seal 100 includes a connector 110 and an O-ring 120. The connector 110 is installed in conjunction with the oil cylinder body, and a receiving groove 111 is provided on one side of the connector 110 close to the bottom of the oil cylinder, so that the cross-section of the connector 110 is Y-shaped. In order to prevent the connector 110 from being torn, the bottom of the receiving groove 111 is set to be arc-shaped. The O-ring 120 is arranged in the accommodating groove 111, and the elasticity of the connecting piece 110 is smaller than that of the O-ring 120. In this embodiment, the connecting piece 110 is low-temperature resistant polyurethane. The setting of the O-ring 120 can improve the shortcoming of the poor sealing performance of the main seal 100 under low pressure, so that the sealing system can meet the working conditions of low temperature and low pressure.

[0036] Reference Figure 2 The buffer seal 200 includes a seal body 210 and a retaining ring 220. The seal body 210 is mounted and matched with the cylinder body side wall of the oil cylinder. The retaining ring 220 is located at the root of the seal body 210, and a clearance groove 212 for accommodating the retaining ring 220 is opened on one side of the root of the seal body 210 close to the oil cylinder rod.

[0037] A buffer groove 211 is provided on one side of the seal body 210 close to the cylinder body to provide sufficient deformation space for the seal body 210. In this embodiment, the seal body 210 is low-temperature polyurethane, and the combination of the retaining ring 220 and the seal body 210 makes the buffer seal 200 have good wear resistance and medium resistance. The retaining ring 220 at the root of the seal body 210 has very good impact resistance, can adapt to harsh working conditions, and prolong the life of the sealing system.

[0038] The implementation principle of a crane outrigger cylinder rod sealing system in an embodiment of the present application is as follows: a worker connects a buffer seal 200, a main seal 100 and a dust ring 300 to the side wall of the cylinder, thereby completing the installation of the sealing system.

[0039] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A crane outrigger oil cylinder rod sealing system, characterized in that: include: The main seal (100) is mounted in cooperation with the side wall of the cylinder body; The buffer seal (200) is located on a side of the main seal (100) close to the bottom of the oil cylinder and is installed in coordination with the side wall of the oil cylinder body; The dust ring (300) is located on a side of the main seal (100) away from the buffer seal (200) and is installed in cooperation with the side wall of the cylinder body. The dust ring (300) comprises: The matching portion (310) is matched and installed with the cylinder body of the oil cylinder; The dustproof lip (320) is fixedly connected to the matching portion (310) and contacts the peripheral side wall of the cylinder rod; A sealing lip (330) is fixedly connected to the matching portion (310), and the sealing lip (330) is located on a side of the dustproof lip (320) away from the bottom of the oil cylinder, and the sealing lip (330) contacts the peripheral side of the oil cylinder rod; The support frame (340) has a "┐"-shaped cross section and is fixedly connected to a side of the matching portion (310) away from the cylinder rod.

2. A crane outrigger cylinder rod sealing system according to claim 1, characterized in that: The free ends of the dustproof lip (320) and the sealing lip (330) are arranged at intervals to form a dustproof lip (321); the bottom of the dustproof lip (321) is arranged to be a curved surface.

3. The crane outrigger cylinder rod sealing system according to claim 1, characterized in that: The main seal (100) comprises: A connecting piece (110) is mounted in cooperation with the cylinder body; An O-ring (120), wherein the connecting piece (110) is provided with a receiving groove (111) for receiving the O-ring (120).

4. A crane outrigger cylinder rod sealing system according to claim 3, characterized in that: The elasticity of the connecting piece (110) is smaller than that of the O-ring (120).

5. The crane outrigger oil cylinder rod sealing system according to claim 3, characterized in that: The bottom of the accommodating groove (111) is arranged to be arc-shaped.

6. The crane outrigger cylinder rod sealing system according to claim 1, characterized in that: The buffer seal (200) comprises: The sealing body (210) is mounted in cooperation with the side wall of the cylinder body of the oil cylinder; The retaining ring (220) is connected to the root of the sealing element body (210), and the retaining ring (220) is arranged close to the oil cylinder rod.

7. A crane outrigger cylinder rod sealing system according to claim 6, characterized in that: A buffer groove (211) is provided on one side of the sealing body (210) close to the bottom of the oil cylinder.

Images