Elastic check ring for hole, shaft assembly and engineering machinery drive axle or gearbox

Abstract

The utility model discloses a circlip for a hole, a shaft assembly and an engineering machinery drive axle or gearbox. The circlip for the hole comprises an arc-shaped part and two extension handles, one extension handle is connected with one end of the arc-shaped part, the other extension handle is connected with the other end of the arc-shaped part, and the two extension handles are symmetrically arranged at the opening of the circlip for the hole; when the circlip for the hole is installed on the shaft portion of the gear shaft, the length of the extension handle is 10-15 mm larger than the outer diameter of a gear ring of the gear shaft. And the width between the two extension handles is smaller than the opening width of the clamp spring groove corresponding to the shell hole. The shaft assembly structure comprises a gear shaft, a bearing, an elastic check ring for a shaft and an elastic check ring for a hole, the elastic check ring for the hole, the bearing and the elastic check ring for the shaft are sequentially arranged on the shaft portion of the gear shaft in a sleeving mode, axial positioning of the bearing is achieved through the elastic check ring for the shaft, and axial positioning of the shaft assembly after the shaft assembly is installed in the shell is achieved through the elastic check ring for the hole.

Description

Technical Field

[0001] The utility model belongs to the technical field of fasteners, and particularly relates to an orifice snap ring, a shaft assembly, and a construction machinery drive axle or gearbox. Background Art

[0002] In the design of a construction machinery drive axle or gearbox, an orifice snap ring is commonly used for axial positioning of parts on a transmission shaft to prevent axial displacement of the parts. An orifice snap ring is a commonly used part for axial positioning of parts, generally divided into an external snap ring for shafts (GB894 external snap ring for shafts) and an orifice snap ring (GB893 orifice snap ring). At present, there are mainly two types of orifice snap rings. However, when it is necessary to be used in a special structure, due to the limitations of space and disassembly tools, it is very difficult to directly use a standard orifice snap ring. There are certain structural limitations inside a construction machinery drive axle or gearbox, and it is impossible to normally install the snap ring. Summary of the Invention

[0003] Objective: To solve the deficiencies of the prior art, the utility model provides an orifice snap ring, a shaft assembly, and a construction machinery drive axle or gearbox, which can still normally install the snap ring to achieve axial positioning of a gear shaft when space is limited.

[0004] Technical Solution: To solve the above technical problems, the technical solution adopted by the utility model is as follows:

[0005] In the first aspect, an orifice snap ring is provided, which is a ring-shaped structure with an opening on one side and is used for sleeving and installing on the shaft part of a gear shaft to achieve axial positioning of the gear ring of the gear shaft.

[0006] The orifice snap ring includes an arc portion and two extension handles. One extension handle is connected to one end of the arc portion, and the other extension handle is connected to the other end of the arc portion. The two extension handles are symmetrically arranged at the opening of the orifice snap ring.

[0007] When the orifice snap ring is installed on the shaft part of the gear shaft, the length of the extension handle exceeds the outer diameter of the gear ring of the gear shaft by 10 - 15 mm; and the width between the two extension handles is less than the opening width of the snap ring groove corresponding to the housing hole.

[0008] In some embodiments, the extension handle includes a first part and a second part connected to each other. The first end of the first part is connected to the arc portion, and the angle between the first part and the second part is 15° - 25°, preferably 20°.

[0009] In some embodiments, the first parts of the two extension handles are arranged parallel to the diameter direction of the arc portion, and the second parts are bent outward along the opening of the orifice snap ring, and the angle between the second parts of the two extension handles is 30° - 50°.

[0010] In some embodiments, the length ratio of the first part to the second part in the extension shank is 3:1 - 4:1.

[0011] In some embodiments, the widths of both the first part and the second part are 5 mm.

[0012] In some embodiments, the opening angle of the circlip for hole is 50° ± 5°.

[0013] In a second aspect, there is provided a shaft assembly, including a gear shaft, a bearing, a circlip for shaft and a circlip for hole. The circlip for hole, the bearing and the circlip for shaft are sequentially sleeved on the shaft part of the gear shaft, and the axial positioning of the bearing is realized through the circlip for shaft, and the axial positioning after the shaft assembly is installed in the housing is realized through the circlip for hole; and when the shaft assembly is installed in the bearing hole of the housing, the two extension shanks of the circlip for hole are located within the opening of the housing snap ring groove, realizing the axial positioning of the shaft assembly.

[0014] In some embodiments, the inner hole diameter of the arc part is larger than the shaft diameter of the gear shaft, and the outer diameter of the circlip for hole is smaller than the outer diameter of the bearing.

[0015] In a third aspect, there is provided a construction machinery drive axle or gearbox, including the above-mentioned circlip for hole or the above-mentioned shaft assembly.

[0016] Advantageous effects: The circlip for hole, the shaft assembly and the construction machinery drive axle or gearbox provided by the present utility model are simple in structure and convenient to use, and can still be conveniently installed or disassembled under the condition of limited space, realizing the axial positioning of the parts in the construction machinery drive axle or gearbox and maintaining the stable operation of the equipment. Description of the Drawings

[0017] Figure 1 It is a front view schematic diagram of the circlip for hole according to an embodiment of the present utility model;

[0018] Figure 2 It is a side view schematic diagram of the shaft assembly according to an embodiment of the present utility model;

[0019] Figure 3 It is a three-dimensional assembly schematic diagram of the shaft assembly according to an embodiment of the present utility model;

[0020] Figure 4 It is a three-dimensional assembly schematic diagram of the shaft assembly and the housing according to an embodiment of the present utility model;

[0021] Figure 5 It is a front view schematic diagram of the housing equipped with the shaft assembly according to an embodiment of the present utility model;

[0022] Figure 6 It is a sectional view schematic diagram of the housing equipped with the shaft assembly according to an embodiment of the present utility model.

[0023] In the figure: 1 snap ring for hole, 11 arc portion, 12 extension handle, 121 first part, 122 second part; 2 shaft assembly, 21 gear shaft, 22 bearing, 23 snap ring for shaft; 3 housing hole; 4 snap ring groove; 5 snap ring groove opening; 6 bearing hole. Specific embodiments

[0024] 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. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way limits the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0025] Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps described in these embodiments do not limit the scope of the present invention. In all the examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that: similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0026] Embodiment 1: As Figure 1 shown, the snap ring 1 for hole is an annular structure with one side open, and is pre - sleeved and installed on the shaft portion of the gear shaft 21. After the shaft assembly is installed into the housing, the snap ring for hole is embedded into the snap ring groove of the housing to achieve axial positioning of the shaft assembly;

[0027] The snap ring 1 for hole includes an arc portion 11 and two extension handles 12. One extension handle is connected to one end of the arc portion, and the other extension handle is connected to the other end of the arc portion. The two extension handles 12 are symmetrically arranged at the opening of the snap ring 1 for hole;

[0028] When the snap ring 1 for hole is installed on the shaft portion of the gear shaft 21, the length of the extension handle 12 exceeds the outer diameter of the tooth ring of the gear shaft 21 by 10 - 15 mm. The width between the two extension handles 12 is less than the width of the snap ring groove opening 5 corresponding to the housing hole 3.

[0029] In this application, by symmetrically arranging two extension handles at the opening of the snap ring for hole and the length of the extension handle exceeding the outer diameter of the gear shaft tooth ring, the installation or disassembly of the snap ring for hole is realized under the condition of limited space structure.

[0030] In some embodiments, the extension handle 12 includes a first part 121 and a second part 122 connected to each other, wherein the first end of the first part 121 is connected to the arc part 11, and an included angle between the first part 121 and the second part 122 is 15° - 25°. In this embodiment, the included angle between the first part and the second part is 20°.

[0031] It should be noted that the setting of the included angle between the first part and the second part of the extension handle can have a certain limiting effect on the tool when using the tool to clamp and tighten the retaining ring, making it more labor-saving, convenient and fast when tightening the retaining ring.

[0032] In some embodiments, the first parts 121 of the two extension handles 12 are arranged parallel to the diameter direction of the arc part, and the second parts 122 are bent outward along the opening of the hole-type circlip, and an included angle between the second parts 122 of the two extension handles 12 is 30° - 50°.

[0033] In some embodiments, the length ratio of the first part 121 to the second part 122 in the extension handle 12 is 3:1 - 4:1.

[0034] In some embodiments, the widths of both the first part 121 and the second part 122 are 5 mm.

[0035] It should be noted that in this embodiment, the width, inner and outer diameters of the arc part 11 of the hole-type circlip are implemented according to the national standard GB893.

[0036] In some embodiments, the opening angle of the hole-type circlip 1 is 50° ± 5°.

[0037] Embodiment 2: Based on Embodiment 1, this embodiment provides a shaft assembly. Figure 2 and Figure 3 are the side view schematic diagram and the three-dimensional assembly schematic diagram of the shaft assembly of this embodiment.

[0038] The shaft assembly 2 includes a gear shaft 21, a bearing 22, a shaft-type circlip 23 and a hole-type circlip 1. During installation, first, the hole-type circlip 1 is sleeved on the shaft part of the gear shaft 21, then the bearing 22 is assembled, and finally, the shaft-type circlip 23 is used for axial fixation of the bearing.

[0039] In this application, the axial positioning of the bearing 22 is realized by the shaft-type circlip 23, and the axial positioning of the shaft assembly in the housing is realized by the hole-type circlip 1; and when the shaft assembly 2 is installed in the housing bearing hole 6, the two extension handles 12 of the hole-type circlip 1 are located in the housing circlip groove opening 5 to realize the axial positioning of the shaft assembly 2.

[0040] In some embodiments, the inner aperture diameter of the arc portion 11 is larger than the shaft diameter of the gear shaft 21, and the outer diameter of the circlip for hole 1 is smaller than the outer diameter of the bearing 22. Therefore, the circlip for hole 1 can slide on the gear shaft 21 but will not come off.

[0041] As Figure 4 shown, install the assembled shaft assembly into the housing hole 3 pre-opened in the drive axle or transmission of the construction machinery. The housing hole 3 is machined with a circumferential snap ring groove 4 according to the national standard GB893. The snap ring groove 4 has a radial opening, namely the snap ring groove opening 5. The width of the snap ring groove opening 5 is larger than the width between the first part 121 and the second part 122 of the extended handle 12 of the circlip for hole, and the depth of the snap ring groove opening 5 exceeds the axial depth of the circlip for hole 1.

[0042] During use, install the shaft assembly 2 into the housing bearing hole 6. Use an installation tool such as a pair of needle-nose pliers to hold the extended handle 12 of the circlip for hole 1 beyond the outer circle of the gear shaft, pinch and tighten it, and then install the circlip for hole 1 into the snap ring groove 4 of the housing hole 3. At the same time, the long handle is embedded into the snap ring groove opening to achieve the axial positioning of the shaft assembly. The front view schematic diagram and the sectional view schematic diagram of the housing assembled with the shaft assembly in this embodiment are as Figure 5 and Figure 6 shown.

[0043] The installation method in this embodiment is simple and fast, and can effectively ensure the stability of the snap ring, preventing it from falling off or shifting during operation. In addition, the shaft circlip in the shaft assembly can effectively prevent the bearing from axially moving; the circlip for hole can provide stable support in the housing hole through its elastic characteristics, ensuring that the installed components will not have axial displacement, thus maintaining the stable operation and accuracy of the mechanical equipment.

[0044] Embodiment 3: Based on Embodiments 1 to 2, this embodiment provides a drive axle or transmission of a construction machinery, which is characterized by including the circlip for hole 1 described in Embodiment 1 or the shaft assembly 2 described in Embodiment 2.

[0045] In the description of the present disclosure / application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only used to explain the relative positional relationship and movement conditions between components in a specific posture. If this specific posture changes, the directional indication will also change accordingly. It is only for the convenience of describing the present disclosure / application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present disclosure / application.

[0046] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", etc. may explicitly or implicitly include one or more such features. In the description of the present disclosure / application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0047] In the description of the present disclosure / application, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure / application can be understood through specific circumstances.

[0048] The above are only the preferred embodiments of the present utility model. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims

1. A circlip for hole, characterized in that, It is an annular structure with an opening on one side, used for sleeving and installing on the shaft part of the gear shaft (21) to achieve axial positioning after the shaft assembly is installed in the housing; The hole snap ring (1) includes an arc part (11) and two extension handles (12). One extension handle is connected to one end of the arc part, and the other extension handle is connected to the other end of the arc part. The two extension handles (12) are symmetrically arranged at the opening of the hole snap ring (1); When the hole snap ring (1) is installed on the shaft part of the gear shaft (21), the length of the extension handle (12) exceeds the outer diameter of the gear ring of the gear shaft (21) by 10 - 15 mm; and the width between the two extension handles (12) is less than the width of the snap ring groove opening (5) corresponding to the housing hole (3).

2. The snap ring for hole according to claim 1, wherein, The extension handle (12) includes a first part (121) and a second part (122) connected to each other. The first end of the first part (121) is connected to the arc part (11), and the angle between the first part (121) and the second part (122) is 15° - 25°.

3. The circlip for hole according to claim 2, characterized in that, The first parts (121) of the two extension handles (12) are arranged parallel to the diameter direction of the arc part, and the second parts (122) are bent outward along the opening of the hole snap ring. The angle between the second parts (122) of the two extension handles (12) is 30° - 50°.

4. The snap ring for hole according to claim 2, wherein, The length ratio of the first part (121) to the second part (122) in the extension handle (12) is 3:1 - 4:

1.

5. The snap ring for hole according to claim 2, wherein The widths of both the first part (121) and the second part (122) are 5 mm.

6. The snap ring for hole according to any one of claims 1-5, characterized in that, The opening angle of the hole snap ring (1) is 50° ± 5°.

7. A shaft assembly, characterized in that, It includes a gear shaft (21), a bearing (22), a shaft snap ring (23), and the hole snap ring (1) according to any one of claims 1 - 6. The hole snap ring (1), the bearing (22), and the shaft snap ring (23) are sequentially sleeved on the shaft part of the gear shaft (21), and the axial positioning of the bearing (22) is achieved through the shaft snap ring (23), and the axial positioning of the gear shaft (21) is achieved through the hole snap ring (1); and when the shaft assembly (2) is installed in the housing bearing hole (6), the two extension handles (12) of the hole snap ring (1) are located within the housing snap ring groove opening (5) to achieve the axial positioning of the shaft assembly (2).

8. The shaft assembly according to claim 7, wherein The inner hole diameter of the arc part (11) is larger than the shaft diameter of the gear shaft (21), and the outer diameter of the hole snap ring (1) is smaller than the outer diameter of the bearing (22).

9. An engineering machinery drive axle or gearbox, characterized in that, It includes the hole snap ring (1) according to any one of claims 1 - 6 or the shaft assembly (2) according to any one of claims 7 - 8.

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