CN207485837U - A kind of transmission input shaft component - Google Patents

Abstract

The utility model discloses a transmission input shaft assembly, which comprises a transmission input shaft body. A connected bearing installation cavity, an oil passage cavity and a plug are sequentially arranged in the axial direction from the power output end to the power input end of the transmission input shaft body. Installation cavity and spline connection cavity; the diameter of the bearing installation cavity is larger than the diameter of the oil passage cavity and the plug installation cavity, the diameter of the plug installation cavity is larger than the diameter of the spline connection cavity and forms a plug limit step at the intersection, and the plug installation cavity There is a plug to prevent the lubricating oil from flowing from the oil chamber to the spline connection chamber. A radially penetrating oil hole is arranged on the side wall of the plug installation cavity. In the input shaft assembly of the transmission, an oil return route is formed between the bearing installation cavity and the oil passage hole, so that parts such as needle rollers installed in the bearing installation cavity can achieve excellent oil return lubrication effect, and the connected stepped shaft hole is convenient. Spline connection cavity machining.

Description

Transmission input shaft assembly

technical field

The utility model relates to transmission components, in particular to a transmission input shaft assembly.

Background technique

The transmission is a mechanism used to change the speed and torque from the engine. It can fix or step-by-step change the transmission ratio of the transmission output shaft and the transmission input shaft, also known as the gearbox. The transmission input shaft is the shaft through which the power enters the transmission. The power enters the transmission from the engine through the transmission input shaft, and then the transmission input shaft drives the input gear on the shaft to transmit the power to the output gear to drive the transmission output shaft to rotate.

At present, a common transmission input shaft assembly on the market is that the power output end of the transmission input shaft body is provided with driving teeth along the circumferential direction and a bearing installation cavity is arranged along the axial direction, and the power input end of the transmission input shaft body is arranged along the axial direction. There is a spline connection cavity, the bearing installation cavity is coaxial with the spline connection cavity; the power output end is located in the transmission case to drive the transmission, the power input end is located outside the transmission case for easy connection to the engine, and the bearing installation cavity and the power input end exist A section of solid shaft. In this way, the transmission input shaft assembly has the following disadvantages: 1. The bearing installation cavity is equivalent to a blind hole, and the lubricating oil is difficult to circulate inside and outside, resulting in poor lubrication effect of the needle rollers and other parts in the bearing installation cavity, which are easy to be damaged. The service life is low; 2. When processing the spline connection cavity at the power input end of the transmission input shaft assembly, it is necessary to consider the undercut groove, which is inconvenient to process.

Utility model content

Aiming at the above-mentioned deficiencies in the prior art, the purpose of this utility model is to propose a transmission input shaft assembly. This transmission input shaft assembly increases the oil return lubrication effect of the parts such as needle rollers installed in the bearing installation cavity, which is convenient. Key connection cavity machining.

Therefore, the technical solution of the utility model is: a transmission input shaft assembly, including a transmission input shaft body, the power output end of the transmission input shaft body is provided with driving teeth along the circumferential direction and a bearing installation cavity is provided along the axial direction, The power input end of the transmission input shaft body is provided with a spline connection cavity in the axial direction, and the bearing installation cavity is coaxial with the spline connection cavity; an oil passage cavity is also arranged in turn between the bearing installation cavity and the spline connection cavity It communicates with the plug installation chamber, the bearing installation chamber, the oil passage chamber, the plug installation chamber and the spline connection chamber; the diameter of the bearing installation chamber is larger than the diameter of the oil passage chamber and the plug installation chamber, and the diameter of the plug installation chamber is larger than that of the spline The diameter of the connecting cavity and the plug limit step are formed at the intersection; the plug installation cavity is provided with a plug to prevent the lubricating oil from flowing from the oil cavity to the spline connection cavity, and the plug is compatible with the plug installation cavity And the side close to the spline connection cavity abuts against the stopper step, and at least one radially penetrating oil hole is provided on the side wall of the oil passage cavity near the plug installation cavity.

When the transmission input shaft assembly is working, the lubricating oil in the transmission flows into the transmission input shaft assembly from the bearing installation chamber, flows out of the transmission input shaft assembly through the oil passage chamber and the oil passage hole, and forms an oil return route between the bearing installation chamber and the oil passage hole , so that the needle roller and other parts installed in the bearing installation cavity achieve excellent oil return lubrication effect; the bearing installation cavity, the oil passage cavity, the plug installation cavity and the spline connection cavity are connected to form a stepped shaft hole, and the stepped shaft The setting of the hole makes full use of the advantages of the stepped shaft hole when processing the spline connection cavity. Since the diameter of the spline connection cavity is the smallest, the nearby oil passage cavity and plug installation cavity can be fully utilized when processing the spline connection cavity without machining The undercut groove is very convenient for processing.

Further, the axes of the bearing installation chamber, the oil passage chamber, the plug installation chamber and the spline connection chamber are all located on the same straight line, and the straight line constitutes the axis of the transmission input shaft body.

Further, there are two oil through holes, and the line connecting the axes of the two oil through holes intersects the axis of the transmission input shaft body.

Further, the oil through hole is a round hole.

Further, the diameter of the oil passage cavity is larger than that of the plug installation cavity.

Further, the diameter of the oil passage cavity is equal to the diameter of the plug installation cavity.

Further, a frustum-shaped transition section is provided between the bearing installation chamber and the oil passage chamber, and between the oil passage chamber and the plug installation chamber. The setting of the truncated conical transition section facilitates the press-fitting of the plug.

Further, the plug is in interference fit with the wall of the oil passage cavity. The plug has an interference fit with the wall of the oil passage chamber, which is not easy to loosen, and has a better effect of preventing lubricating oil from flowing into the spline connection chamber from the oil passage chamber.

Further, an annular positioning groove is provided along the outer periphery of the side wall of the oil passage chamber of the transmission input shaft body.

The beneficial effects of the utility model:

1. When the transmission input shaft assembly is working, the lubricating oil in the transmission flows into the transmission input shaft assembly from the bearing installation chamber, flows out of the transmission input shaft assembly through the oil passage chamber and the oil passage hole, and forms a return line between the bearing installation chamber and the oil passage hole. The oil line makes the needle roller and other parts installed in the bearing installation cavity achieve excellent oil return lubrication effect;

2. The bearing installation chamber, the oil passage chamber, the plug installation chamber and the spline connection chamber are connected to form a stepped shaft hole. The setting of the stepped shaft hole makes full use of the advantages of the stepped shaft hole when the spline connection chamber is processed. The diameter of the connection cavity is the smallest, so the nearby oil passage cavity and plug installation cavity can be fully utilized when processing the spline connection cavity, and there is no need to process the undercut groove, and the processing is very convenient.

Description of drawings

Fig. 1 is the structural representation of the input shaft assembly of the transmission of the embodiment of the utility model;

Fig. 2 is the A-A view of Fig. 1;

Fig. 3 is a schematic structural view of the transmission input shaft body of the embodiment of the present invention;

Fig. 4 is an enlarged view of B in Fig. 3 .

In the accompanying drawings: 1-transmission input shaft body; 2-plug;

11-bearing installation chamber; 12-oil passage chamber; 13-plug installation chamber; 14-spline connection chamber; 15-oil passage hole; 16-annular positioning groove.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further described:

As shown in Figure 1 and Figure 2, a transmission input shaft assembly of this embodiment has a transmission input shaft body 1, and the power output end of the transmission input shaft body 1 is provided with drive teeth along the circumferential direction and bearings are provided along the axial direction The installation cavity 11 and the power input end of the transmission input shaft body 1 are provided with a spline connection cavity 14 in the axial direction, and the bearing installation cavity 11 and the spline connection cavity 14 are coaxial.

As shown in Figure 3, between the bearing installation cavity 11 and the spline connection cavity 14, an oil passage chamber 12 and a plug installation chamber 13 are arranged in sequence, the bearing installation chamber 11, the oil passage chamber 12, the plug installation chamber 13 and the spline The key connection chamber 14 is connected; the axes of the bearing installation chamber 11, the oil passage chamber 12, the plug installation chamber 13 and the spline connection chamber 14 are all located on the same straight line, and the straight line constitutes the axis of the transmission input shaft body 1.

As shown in Figures 2 to 4, the diameter of the bearing installation chamber 11 is larger than the diameter of the oil passage chamber 12 and the plug installation chamber 13, and the diameter of the plug installation chamber 13 is larger than the diameter of the spline connection chamber 14 and forms a plug limit step at the intersection ; A plug 2 that prevents lubricating oil from flowing from the oil passage chamber 12 to the spline connection chamber 14 is provided in the plug installation chamber 13, and the plug 2 is adapted to the plug installation chamber 13 and is close to the spline connection chamber 14 The side is in contact with the stopper step.

As shown in Figures 1 and 2, two radially through oil holes 15 are arranged on the side wall of the oil hole 12 near the plug installation cavity 13, and the axis line of the two oil holes 15 is connected with the transmission input shaft body. The axes intersect perpendicularly. In this embodiment, the oil through holes 15 are circular holes. The number of oil through holes 15 in actual application is determined according to the actual situation. For example, when the diameter of the bearing installation cavity 11 is small, fewer oil through holes 15 can be used, and the diameter of the bearing installation cavity 11 is smaller. A plurality of oil through holes 15 can be used when it is large, and the oil through holes 15 can also adopt other shapes, as long as the requirements for use are met.

As shown in Figure 2, when the transmission input shaft assembly is in operation, the lubricating oil in the transmission flows into the transmission input shaft assembly from the bearing installation chamber 11, and flows out of the transmission input shaft assembly through the oil passage chamber 12 and the oil passage hole 15, and the bearing installation chamber 11 An oil return route is formed between the oil passage hole 12, so that parts such as needle rollers installed in the bearing installation cavity 11 achieve an excellent oil return lubrication effect. The bearing installation chamber 11, the oil passage chamber 12, the plug installation chamber 13 and the spline connection chamber 14 are connected to form a stepped shaft hole. The setting of the stepped shaft hole makes the spline connection chamber 14 fully utilize the advantages of the stepped shaft hole during processing. Since the diameter of the spline connection cavity 14 is the smallest, the nearby oil passage cavity 12 and the plug installation cavity 13 can be fully utilized when processing the spline connection cavity 14, and there is no need to process the relief groove, so the processing is very convenient.

As shown in Figures 2 to 4, in this embodiment, the diameter of the oil passage chamber 12 is greater than or equal to the diameter of the plug installation chamber 13. When the diameter of the oil passage chamber 12 is larger than the diameter of the plug installation chamber 13, in order to facilitate the installation of the plug 2 Installation, between the bearing installation chamber 11 and the oil passage chamber 12, and between the oil passage chamber 12 and the plug installation chamber 13, there are frustum-shaped transition sections; when the diameter of the oil passage chamber 12 is equal to the diameter of the plug installation chamber 13, only A frustum-shaped transition section is provided between the through-bearing installation cavity 11 and the oil-through cavity 12 .

As shown in Fig. 2 to Fig. 4, in this embodiment, in order to prevent lubricating oil from flowing into the spline connection chamber 14 from the oil passage chamber 12 and achieve an excellent oil separation effect, the plug 2 and the wall of the oil passage chamber adopt an interference fit connection method. The plug 2 has an interference fit with the wall of the oil passage chamber, which is not easy to loosen, and effectively prevents lubricating oil from flowing into the spline connection chamber 14 from the oil passage chamber 12 . Since the plug 2 and the wall of the oil passage chamber adopt an interference fit connection mode, the plug 2 is installed to the plug installation chamber 13 in a press-fitting manner. Specifically, a threaded connection may also be considered between the plug 2 and the plug installation cavity 13, as long as the corresponding oil plugging effect can be achieved.

As shown in FIG. 1 and FIG. 2 , in order to install and position the transmission input shaft assembly, an annular positioning groove 16 is provided along the outer periphery of the side wall of the oil passage chamber of the transmission input shaft body 1 .

The preferred specific embodiments of the present utility model have been described in detail above. It should be understood that those skilled in the art can make many modifications and changes according to the concept of the utility model without creative efforts. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the prior art should be within the scope of protection defined by the claims .

Claims (9)

1. a kind of transmission input shaft component, including transmission input shaft ontology (1), the transmission input shaft ontology (1) Power output end is circumferentially arranged to be had sliding tooth and axially disposed has bearing installation cavity (11), transmission input shaft ontology (1) Power intake axially disposed have spline connecting cavity (14)；It is characterized in that：The bearing installation cavity (11) connects with spline It connects and logical oil pocket (12) and plug installation cavity (13) is also disposed between chamber (14), the bearing installation cavity (11), logical oil pocket (12), plug installation cavity (13) is connected with spline connecting cavity (14)；Bearing installation cavity (11) diameter is more than logical oil pocket (12) and blocks up Head installation cavity (13) diameter, plug installation cavity (13) diameter are more than spline connecting cavity (14) diameter and form plug limit in intersection Position step；The plug for preventing lubricating oil from flowing to spline connecting cavity (14) from logical oil pocket (12) is provided in plug installation cavity (13) (2), the plug (2) is adapted with plug installation cavity (13) and nearly spline connecting cavity (14) side offsets with plug limited step It connects, an oil-through-hole (15) radially penetrated through is at least set on the side wall of the nearly plug installation cavity (13) of logical oil pocket (12).

2. transmission input shaft component according to claim 1, it is characterised in that：The bearing installation cavity (11), logical oil The axis of chamber (12), plug installation cavity (13) and spline connecting cavity (14) is respectively positioned on same straight line, which forms speed changer Input shaft body axis.

3. transmission input shaft component according to claim 2, it is characterised in that：The oil-through-hole (15) is two and two The axis line of oil-through-hole (15) intersects with transmission input shaft body axis.

4. transmission input shaft component according to claim 1, it is characterised in that：The oil-through-hole (15) is circular hole.

5. transmission input shaft component according to claim 1, it is characterised in that：Logical oil pocket (12) diameter is more than stifled Head installation cavity (13) diameter.

6. transmission input shaft component according to claim 1, it is characterised in that：Logical oil pocket (12) diameter is equal to stifled Head installation cavity (13) diameter.

7. transmission input shaft component according to claim 5, it is characterised in that：The bearing installation cavity (11) and logical oil Between chamber (12), logical it is both provided with truncated cone changeover portion between oil pocket (12) and plug installation cavity (13).

8. transmission input shaft component according to claim 5 or 6, it is characterised in that：The plug (2) and logical oil pocket wall Interference fit.

9. according to claim 1~7 any one of them transmission input shaft component, it is characterised in that：In transmission input shaft Logical oil pocket (12) side wall of ontology (1) is circumferentially provided with annular positioning groove (16).