Oil nozzle fixing structure

Abstract

The utility model discloses an oil nozzle fixing structure, which relates to the field of transmission shafts, and comprises a sleeve shell and an oil nozzle, an unthreaded hole is arranged on the sleeve shell along the radial direction, the lower part of the outer wall of the oil nozzle expands outwards along the radial direction to form a flange, and a sawtooth structure is arranged on the outer wall of the oil nozzle below the flange. And the saw-tooth structure is in interference fit with the unthreaded hole. According to the utility model, internal threads processed on the sealing sleeve can be eliminated, the tightness of the oil nozzle and the sealing sleeve can be ensured, and the loosening phenomenon is prevented.

Description

Technical Field

[0001] The utility model relates to the field of transmission shafts, and particularly relates to an oil nozzle fixing structure. Background Art

[0002] An oil nozzle part (2') needs to be assembled on a sealing sleeve (1') of a transmission shaft, as shown in Figure 1 、 2 、Figure 3. The prior art adopts threaded connection for fixing, that is, an external thread (3') is opened on the outer wall of the oil nozzle part, and at the same time, an internal thread hole (4') is opened on the sealing sleeve. The oil nozzle part is screwed into the sealing sleeve through the thread for threaded fixing. However, this method has the following defects:

[0003] 1. The sealing sleeve needs to be machined with an internal thread, which has many processes and increases the processing cost;

[0004] 2. The oil nozzle is screwed into the sealing sleeve through the thread. Since the connection part is relatively thin and the number of processed thread turns is small, loosening is likely to occur, and the connection quality is unstable. Content of the Utility Model

[0005] The purpose of the utility model is to overcome the deficiencies existing in the prior art, and provide an oil nozzle fixing structure, which can not only cancel the machining of the internal thread on the sealing sleeve, but also ensure the fastening between the oil nozzle and the sealing sleeve, and prevent loosening.

[0006] The purpose of the utility model is achieved by the following technical solutions: This oil nozzle fixing structure includes a sleeve housing and an oil nozzle. A through hole is radially opened on the sleeve housing. The lower part of the outer wall of the oil nozzle expands radially outwards to form a flange. A sawtooth structure is arranged on the outer wall of the oil nozzle below the flange. When the oil nozzle is assembled with the sleeve housing, it is in interference fit with the through hole through the sawtooth structure.

[0007] As a further technical solution, after the oil nozzle is assembled with the sleeve housing, the lower surface of the flange presses against the outer wall of the sleeve housing.

[0008] As a further technical solution, the sawtooth structure includes a flat tooth surface and an inclined tooth surface. The sawtooth structure is in the form of a flat tooth surface on the upper part and an inclined tooth surface on the lower part, so that when the oil nozzle is assembled with the sleeve housing, the sawtooth structure first contacts the through hole through the inclined tooth surface.

[0009] The beneficial effects of the utility model are as follows:

[0010] 1. The sealing sleeve does not need to be machined with an internal thread, which reduces the processing cost and improves the processing efficiency;

[0011] 2. The external thread on the oil nozzle is changed to a sawtooth structure, which can be in interference fit with the through hole on the sleeve housing, ensure the connection strength, and is not easy to loosen, improving the quality stability;

[0012] 3. The sawtooth structure is in the form with the flat tooth surface on the upper side and the inclined tooth surface on the lower side. The sawtooth structure first contacts the light hole through the inclined tooth surface to guide the nozzle to be smoothly inserted into the light hole. Description of the Drawings

[0013] Figure 1 It is a schematic structural diagram of a sealing sleeve in the prior art.

[0014] Figure 2 It is a schematic structural diagram of a nozzle part in the prior art.

[0015] Figure 3 It is a schematic structural diagram of the assembled structure of the nozzle part and the sealing sleeve in the prior art.

[0016] Figure 4 It is a schematic structural diagram of the casing shell in the present utility model.

[0017] Figure 5 It is a schematic structural diagram of the nozzle in the present utility model.

[0018] Figure 6 It is a schematic structural diagram of the assembled structure of the nozzle and the casing shell in the present utility model.

[0019] Figure 7 It is Figure 6 a partial enlarged schematic diagram of area A in

[0020] Description of the reference numerals: Sealing sleeve 1', Nozzle part 2', External thread 3', Internal thread hole 4';

[0021] Casing shell 1, Light hole 11, Nozzle 2, Flange 21, Sawtooth structure 22, Flat tooth surface 23, Inclined tooth surface 24. Detailed Description of the Embodiment

[0022] The present utility model will be described in detail below with reference to the drawings:

[0023] Embodiment: As shown in the attached Figures 4 to 7 drawing, this nozzle fixing structure includes a casing shell 1, a light hole 11, a nozzle 2, a flange 21, a sawtooth structure 22, a flat tooth surface 23 and an inclined tooth surface 24.

[0024] Referring to the attached Figure 4 drawing, a light hole 11 is radially opened on the casing shell 1, as Figure 5As shown, the lower part of the outer wall of the nozzle 2 expands radially outward to form a flange 21. A serrated structure 22 is provided on the outer wall of the nozzle 2 below the flange 21. Further, the serrated structure 22 includes a flat tooth surface 23 and an inclined tooth surface 24. In this embodiment, the serrated structure 22 adopts the form of the flat tooth surface 23 on the upper part and the inclined tooth surface 24 on the lower part, ensuring that when the nozzle 2 is assembled with the casing shell 1, the serrated structure 22 first contacts the optical hole 11 through the inclined tooth surface 24, so as to guide the nozzle 2 to be smoothly inserted into the optical hole 11, and the nozzle 2 is in interference fit with the optical hole 11 through the serrated structure 22.

[0025] As Figure 6 , 7 shown, when the assembly of the nozzle 2 and the casing shell 1 is completed, the lower surface of the flange 21 presses tightly against the outer wall of the casing shell 1 to achieve sealing.

[0026] The working process of the present utility model: The present utility model processes the serrated structure 22 on the nozzle 2, and only processes an optical hole 11 on the casing shell 1. During assembly, the serrated structure 22 of the nozzle 2 is pressed into the optical hole 11, and the inclined tooth surface 24 first plays a guiding role, so that the entire serrated structure 22 can be tightly interference-fitted with the optical hole 11 and firmly fixed in the optical hole 11 through the serrations. It not only cancels the processing of the internal thread on the sealing sleeve, but also ensures the fastening between the nozzle and the sealing sleeve, prevents loosening, and improves the stability of the assembly quality.

[0027] It can be understood that for those skilled in the art, any equivalent replacement or change to the technical solution and the inventive concept of the present utility model should fall within the protection scope of the appended claims of the present utility model.

Claims

1. A nozzle fixing structure, characterized in that: The invention comprises a sleeve shell (1) and an oil nozzle (2), wherein a light hole (11) is radially opened on the sleeve shell (1), the lower part of the outer wall of the oil nozzle (2) expands radially outward to form a flange (21), and a sawtooth structure (22) is arranged on the outer wall of the oil nozzle (2) below the flange (21). When the oil nozzle (2) and the sleeve shell (1) are assembled, the sawtooth structure (22) and the light hole (11) are interference-fitted.

2. The nozzle fixing structure according to claim 1, characterized in that: After the oil nozzle (2) is assembled with the sleeve housing (1), the lower surface of the flange (21) is pressed tightly against the outer wall of the sleeve housing (1).

3. The nozzle fixing structure according to claim 1, characterized in that: The sawtooth structure (22) comprises a flat tooth surface (23) and an oblique tooth surface (24). The sawtooth structure (22) is in the form of a flat tooth surface (23) on the top and an oblique tooth surface (24) on the bottom, so that when the oil nozzle (2) and the sleeve housing (1) are assembled, the sawtooth structure (22) first contacts the light hole (11) through the oblique tooth surface (24).

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