Shaft end anti-abrasion rotating structure, center rotating diverter valve and grab bucket

Abstract

The utility model relates to the technical field of grab buckets, in particular to a shaft end anti-abrasion rotating structure, a center rotating diverter valve and a grab bucket, which comprise a valve body and a rotating shaft, a valve cavity for the rotating shaft to insert is arranged in the valve body, two deep groove ball bearings are arranged between the side wall of the valve cavity and the rotating shaft and are positioned at two ends of the valve body, and the rotating shaft is arranged in the valve cavity. And the rotating shaft is in transition fit with the inner ring of the deep groove ball bearing. According to the shaft end anti-abrasion rotating structure, a framework oil seal is replaced by the deep groove ball bearing, the concentricity of the rotating shaft and the valve body is increased, abrasion of a sealing piece in the working process can be reduced, and the service life of the sealing piece is prolonged. The sealing performance requirement can be met through multiple rotating step seals, so that deep groove ball bearings can be adopted at the two ends of the rotating shaft.

Description

TECHNICAL FIELD

[0001] The utility model relates to grab bucket technical field especially relates to a shaft end anti-abrasion rotating structure, central rotation shunt valve and grab bucket. BACKGROUND

[0002] The grab bucket is one of excavator working devices, and is one of excavator working device accessories specially designed, researched and developed for specific working requirements of the excavator. The rotary grab bucket needs to modify the excavator pipeline and hydraulic system to meet the requirement of 360-degree rotation, and is realized through the central rotation shunt valve.

[0003] REFERENCE Figure 1 The end of the central rotation shunt valve in the prior art is generally sealed through the skeleton oil seal, but the concentricity between the shaft and the valve body is not enough, so that the sealing element is abraded quickly. UTILITY MODEL CONTENT

[0004] The utility model solves the technical problems in the prior art, and provides a shaft end anti-abrasion rotating structure, a central rotation shunt valve and a grab bucket.

[0005] The utility model adopts the technical scheme that a shaft end anti-abrasion rotating structure comprises a valve body and a rotating shaft, a valve cavity for inserting the rotating shaft is arranged in the valve body, a deep groove ball bearing is arranged between the valve cavity side wall and the rotating shaft, the deep groove ball bearing is arranged at two ends of the valve body, and the rotating shaft and the inner ring of the deep groove ball bearing are transitionally matched.

[0006] The shaft end anti-abrasion rotating structure can replace the skeleton oil seal with the deep groove ball bearing, increase the concentricity of the rotating shaft and the valve body, reduce the abrasion of the sealing element during the working process, and prolong the service life of the sealing element.

[0007] Further, a rotary stator seal is arranged between the valve cavity and the valve body.

[0008] Further, an oil cavity is arranged on the valve cavity side wall, the rotary stator seal is at least two, and the oil cavity is located between the rotary stator seals.

[0009] Further, the oil cavity is at least two, the number of the rotary stator seals is at least one more than that of the oil cavities, so that at least one rotary stator seal is arranged between the adjacent two oil cavities.

[0010] Further, a rotary groove accommodating the rotary stator seal is arranged on the valve cavity side wall.

[0011] Further, a shaft shoulder is arranged on the rotating shaft, and the inner ring of one of the deep groove ball bearings abuts against the shaft shoulder.

[0012] Further, the rotating shaft is provided with a check ring groove, and an axle end check ring is arranged in the check ring groove.

[0013] Further, the rotating shaft end is provided with a chamfer.

[0014] A center rotating split valve comprises the above-mentioned axle end wear-preventing rotating structure.

[0015] A grab bucket comprises the above-mentioned center rotating split valve.

[0016] The present application has the following beneficial effects:

[0017] 1. The deep groove ball bearing is used to replace the skeleton oil seal, the concentricity of the rotating shaft and the valve body is increased, and thus the wear of the sealing element during working can be reduced, and the service life of the sealing element is prolonged.

[0018] 2. The multiple rotary seals can meet the sealing performance requirements, and thus the deep groove ball bearings can be used at both ends of the rotating shaft.

[0019] 3. The axle shoulder and the axle end check ring are matched to fix the two deep groove ball bearings, and the position of the valve body and the rotating shaft is relatively fixed. BRIEF DESCRIPTION OF DRAWINGS

[0020] The present application will be further described below in combination with the drawings and embodiments.

[0021] Figure 1 is a structure diagram of the skeleton oil seal in the prior art.

[0022] Figure 2 is a structure diagram of the axle end wear-preventing rotating structure in the present application.

[0023] In the drawing: 1, valve body; 11, oil cavity; 2, rotating shaft; 21, axle shoulder; 22, axle end check ring; 23, chamfer; 3, deep groove ball bearing; 4, rotary seal; 5, skeleton oil seal. DETAILED DESCRIPTION

[0024] The present application will be further described below in combination with the drawings and embodiments.

[0025] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model. In addition, the features limited by "first" and "second" can explicitly or implicitly include one or more features. In the description of the utility model, unless otherwise stated, the meaning of "multiple" is two or more. In the description of the utility model, it should be explained that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0026] The utility model discloses a kind of shaft end anti-abrasion rotating structure.

[0027] Refer to Figure 2 A kind of shaft end anti-abrasion rotating structure, including valve body 1 and rotating shaft 2, valve body 1 is equipped with the valve cavity for rotating shaft 2 insertion, deep groove ball bearing 3 is equipped between valve cavity side wall and rotating shaft 2, deep groove ball bearing 3 is equipped with two, and located the two ends of valve body 1, rotating shaft 2 and the inner ring of deep groove ball bearing 3 are transition fit. Deep groove ball bearing 3 replaces framework oil seal 5, increase the concentricity of rotating shaft 2 and valve body 1, and then the abrasion of sealing element in working process can be reduced, the service life of sealing element is improved.

[0028] Rotary stef 4 is equipped between valve cavity and valve body 1, oil cavity 11 is equipped on the side wall of valve cavity, oil cavity 11 is equipped with at least two, rotary stef 4 is equipped with at least two, multiple oil cavities 11 are located between multiple rotary stefs 4. The number of rotary stef 4 is at least one more than oil cavity 11, to ensure that there is at least one rotary stef 4 between adjacent two oil cavities 11, and then the possibility of leakage between adjacent oil cavities 11 is reduced. Rotary groove that accommodates rotary stef 4 is provided on the side wall of valve cavity.

[0029] In addition, the shaft 2 is provided with a shaft shoulder 21, and the inner ring of one of the deep groove ball bearings 3 abuts against the shaft shoulder 21. The shaft 2 is provided with a retaining ring groove, and the shaft end retaining ring 22 is arranged in the retaining ring groove and abuts against the inner ring of the deep groove ball bearing 3 away from the shaft shoulder 21. The two deep groove ball bearings 3 are fixed by cooperation of the shaft shoulder 21 and the shaft end retaining ring 22, and the position of the valve body 1 and the shaft 2 is relatively fixed

[0030] It should be noted that the end of the shaft 2 is provided with a chamfer 23, so that the deep groove ball bearing 3 is sleeved on the shaft 2.

[0031] A center rotary split valve comprising the shaft end wear-resistant rotating structure.

[0032] A grab bucket comprising the center rotary split valve.

[0033] Working principle: the deep groove ball bearing 3 is used to replace the skeleton oil seal 5, the concentricity of the shaft 2 and the valve body 1 is increased, and then the wear of the sealing element during work can be reduced, and the service life of the sealing element is improved. The multiple rotary Stener seals 4 can meet the sealing performance requirements, so the deep groove ball bearings 3 can be used at both ends of the shaft 2.

[0034] Based on the above ideal embodiments of the present application, through the above description, relevant personnel can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the content in the specification, and the technical scope must be determined according to the scope of claims.

Claims

1. A shaft end anti-wear rotating structure, characterized in that, The valve includes a valve body (1) and a rotating shaft (2). The valve body (1) has a valve cavity for the rotating shaft (2) to be inserted into. A deep groove ball bearing (3) is provided between the side wall of the valve cavity and the rotating shaft (2). There are two deep groove ball bearings (3) and they are located at both ends of the valve body (1). The rotating shaft (2) and the inner ring of the deep groove ball bearing (3) are in transition fit.

2. The anti-wear rotating structure at the shaft end according to claim 1, characterized in that, A rotary seal (4) is provided between the valve cavity and the valve body (1).

3. The anti-wear rotating structure at the shaft end according to claim 2, characterized in that, The valve chamber has an oil cavity (11) on its side wall, and the rotary seal (4) has at least two oil cavities (11) located between multiple rotary seals (4).

4. The anti-wear rotating structure at the shaft end according to claim 3, characterized in that, The oil chamber (11) is provided with at least two, and the number of the rotating seals (4) is at least one more than the number of oil chambers (11) to ensure that there is at least one rotating seal (4) between two adjacent oil chambers (11).

5. The anti-wear rotating structure at the shaft end as described in claim 2, characterized in that, The valve chamber has a rotating groove on its side wall to accommodate the rotating seal (4).

6. The anti-wear rotating structure at the shaft end as described in claim 1, characterized in that, The rotating shaft (2) is provided with a shoulder (21), and the inner ring of one of the deep groove ball bearings (3) abuts against the shoulder (21).

7. The anti-wear rotating structure at the shaft end as described in claim 6, characterized in that, The rotating shaft (2) is provided with a retaining ring groove, and a shaft end retaining ring (22) is provided in the retaining ring groove. The shaft end retaining ring (22) abuts against the inner ring of the deep groove ball bearing (3) away from the shaft shoulder (21).

8. The anti-wear rotating structure at the shaft end as described in claim 1, characterized in that, The end of the rotating shaft (2) is provided with a chamfer (23).

9. A central rotary diverter valve, characterized in that, Includes the anti-wear rotating structure for the shaft end as described in any one of claims 1-8.

10. A grab bucket, characterized in that, Includes the center rotary diverter valve as described in claim 9.

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