CN108488361B

CN108488361B - Gear shaft

Info

Publication number: CN108488361B
Application number: CN201810281633.2A
Authority: CN
Inventors: 刘显宏; 朱荣; 吴定勇; 韩柳; 田战胜; 张振坤
Original assignee: Guangxi Yuchai Machinery Co Ltd
Current assignee: Guangxi Yuchai Machinery Co Ltd
Priority date: 2018-04-02
Filing date: 2018-04-02
Publication date: 2024-03-12
Anticipated expiration: 2038-04-02
Also published as: CN108488361A

Abstract

The invention discloses a gear shaft which is used for positioning and mounting a gear on a cylinder body, wherein the cylinder body is provided with a pin hole and a plurality of screw holes, and the gear shaft comprises a shaft body part and a positioning pin. The shaft body is arranged on the cylinder body; the shaft body comprises a positioning hole, and the positioning hole is positioned at the center of the shaft body. The locating pin includes the location section, and the location section is located the one end of locating pin, installs in the pinhole of cylinder block after the location section passes the locating hole. Wherein the positioning section is used for positioning the shaft body part in the pin hole of the cylinder body. The invention has simple structure, easy manufacture and easy popularization; the structure is simple to assemble and convenient to disassemble, and has the dual functions of positioning and disassembling.

Description

Gear shaft

Technical Field

The invention relates to the field of engine manufacturing, in particular to a positioning pin for positioning a gear shaft and a gear on a cylinder body.

Background

For some specific engines, the unitary gear shaft is not capable of meeting design requirements and installation requirements due to engine layout limitations. The novel gear shaft locating pin must be considered to be designed, namely the locating action of the gear shaft is split, and the novel gear shaft locating pin is designed into a locating pin structure so as to meet the condition that some engines are complex in layout.

The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art.

Disclosure of Invention

The invention aims to provide a gear shaft, so that the defect that the integral gear shaft cannot meet design requirements and installation requirements due to the limitation of the engine layout in the prior art is overcome.

In order to achieve the above object, the present invention provides a gear shaft for positioning and mounting a gear on a cylinder block having a pin hole and a plurality of screw holes, the gear shaft including a shaft body and a positioning pin. The shaft body is arranged on the cylinder body and comprises a positioning hole, and the positioning hole is positioned at the center of one end of the shaft body; the locating pin includes the location section, and the location section is located the one end of locating pin, installs in the pinhole of cylinder block after the location section passes the locating hole. Wherein the positioning section is used for positioning the shaft body part in the pin hole of the cylinder body.

Preferably, in the above technical solution, the shaft body further includes a mounting hole and a plurality of through holes. The mounting hole is communicated with the positioning hole and is coaxially positioned at the center of the other end of the shaft body; the plurality of through holes are uniformly distributed around the positioning holes and the mounting holes.

Preferably, in the above technical solution, the positioning pin further comprises an intermediate section and a threaded section. The middle section is positioned at the middle position of the positioning pin; the thread section is positioned at the other end of the locating pin, and a part of the thread section protrudes out of the gear shaft. The diameter of the middle section is larger than that of the positioning section and that of the threaded section, the middle section and the threaded section are arranged in the mounting hole, and the threaded section is used for disassembling the positioning pin.

Preferably, in the above technical solution, the positioning section of the positioning pin is in transition fit with the pin hole of the cylinder block.

Preferably, in the above technical solution, the positioning section of the positioning pin is in clearance fit with the positioning hole of the gear shaft.

Preferably, in the above technical solution, the middle section is in clearance fit with the mounting hole.

Compared with the prior art, the gear shaft has the following beneficial effects: the structure is simple, the manufacture is easy, and the popularization is easy; the structure is simple to assemble and convenient to disassemble, and has the dual functions of positioning and disassembling.

Drawings

Fig. 1 is a sectional view of a gear shaft and dowel pin combination according to the present invention.

Fig. 2 is a combined perspective view of a gear shaft and a locating pin according to the present invention.

Fig. 3 is a perspective view of another view of the gear shaft and dowel pin combination according to the present invention.

Fig. 4 is a schematic structural view of a locating pin of a gear shaft according to the present invention.

Fig. 5 is a cross-sectional view of a gear shaft, a positioning pin, and a gear assembled to a cylinder block according to the present invention.

Fig. 6 is a schematic front view of the gear shaft, the positioning pin, and the gear assembled to the cylinder block according to the present invention.

Fig. 7 is a schematic top view of the gear shaft, the locating pin, and the gear assembled to the cylinder block according to the present invention.

Fig. 8 is a schematic view showing the sequence of disassembly of the gear shaft, the locating pin, the bolt and the gear according to the present invention.

The main reference numerals illustrate:

the novel gear comprises a 1-shaft body, 11-positioning holes, 12-mounting holes, 13-through holes, 2-positioning pins, 21-positioning sections, 22-middle sections, 23-threaded sections, 3-gears, 4-cylinder blocks, 41-pin holes, 42-screw holes and 5-bolts.

Detailed Description

The following detailed description of embodiments of the invention is, therefore, to be taken in conjunction with the accompanying drawings, and it is to be understood that the scope of the invention is not limited to the specific embodiments.

Throughout the specification and claims, unless explicitly stated otherwise, the term "comprise" or variations thereof such as "comprises" or "comprising", etc. will be understood to include the stated element or component without excluding other elements or components.

As shown in fig. 1 to 3, fig. 1 is a sectional view of a gear shaft and a locating pin combination according to the present invention. Fig. 2 is a combined perspective view of a gear shaft and a locating pin according to the present invention. Fig. 3 is a perspective view of another view of the gear shaft and dowel pin combination according to the present invention. A gear shaft according to an embodiment of the present invention for positioning and mounting a gear 3 on a cylinder block 4, the cylinder block 4 having a pin hole 41 and a plurality of screw holes 42, includes a shaft body 1 and a positioning pin 2. The shaft body 1 has a disk shape, and the shaft body 1 includes a positioning hole 11 and a mounting hole 12. The positioning hole 11 is positioned at the center of the shaft body 1; the mounting hole 12 and the positioning hole 11 are coaxially arranged at the central position of the shaft body 1, and the diameter of the mounting hole 12 is larger than that of the positioning hole 11; the shaft body 1 further includes a plurality of through holes 13 uniformly distributed around the positioning holes 11, and the shaft body 1 is fixed to a plurality of screw holes 42 of the cylinder block 4 by a plurality of bolts 5 through the plurality of through holes 13.

As shown in fig. 4 to 5, fig. 4 is a schematic structural view of the locating pin of the gear shaft according to the present invention. Fig. 5 is a cross-sectional view of a gear shaft, a positioning pin, and a gear assembled to a cylinder block according to the present invention. In some embodiments, the positioning pin 2 includes a positioning section 21, the positioning section 21 is located at one end of the positioning pin 2, and the positioning section 21 is installed in the pin hole 41 of the cylinder block 4 after passing through the positioning hole 11. Wherein the positioning section 21 is used to position the shaft body 1 within the pin bore 41 of the cylinder block 4. In some embodiments, the dowel 2 further includes an intermediate section 22 and a threaded section 23. The middle section 22 is positioned at the middle position of the positioning pin 2, and the diameter of the middle section 22 is larger than that of the positioning section 21; the thread section 23 is positioned at the other end of the positioning pin 2, and a part of the thread section 23 protrudes out of the gear shaft; wherein the threaded section 23 is used for the removal of the locating pin 2.

Referring again to fig. 1-5, in some embodiments, the locating section 21 of the locating pin 2 is in a transition fit with the pin bore 41 of the cylinder block 4. The positioning section 21 of the positioning pin 2 is in clearance fit with the positioning hole 11 of the gear shaft. The intermediate section 22 is mounted in the mounting hole 12, the intermediate section 22 being mounted in a clearance fit with the mounting hole 12.

As shown in fig. 6 to 8, fig. 6 is a schematic front view of a gear shaft, a positioning pin, and a gear assembled to a cylinder block according to the present invention. Fig. 7 is a schematic top view of the gear shaft, the locating pin, and the gear assembled to the cylinder block according to the present invention. Fig. 8 is a schematic view showing the sequence of disassembly of the gear shaft, the locating pin, the bolt and the gear according to the present invention. In some embodiments, a portion of the threaded section 23 of the dowel 2 is intended to protrude beyond the gear shaft, which is designed in order that the threaded section 23 of the dowel 2 functions for removal of the dowel 2. Because the traditional installation mode of the gear 3 and the gear shaft is that the gear shaft is firstly fixed on the cylinder body 4 by the bolts 5 and the positioning pins 2, then the gear 3 is arranged on the gear shaft along the axial direction of the gear shaft, and the gear 3 is firstly detached along the axial direction of the gear shaft during detachment, and then the gear shaft is detached. However, the above-mentioned disassembly and assembly method is limited to the working condition that the mounting control of the gear 3 and the gear shaft is enough, but if the mounting space is greatly limited, the conventional mounting and disassembly process cannot be satisfied.

Referring again to fig. 6 to 8, in the mounting position of the gear 3 of the present embodiment, as shown in fig. 5, since the cylinder block 4 has the block of the a position, the gear 3 cannot be mounted along the axial direction of the gear shaft according to the conventional mounting process, the gear 3 can only be pushed in place from the radial direction of the gear 3 according to the arrow of fig. 6, then the gear shaft is loaded into the shaft hole of the gear 3 along the axial direction thereof, and finally the positioning pin 2 is inserted and fixed with the bolt 5. The sequence of the disassembly is to disassemble the bolt 5, pull out the locating pin 2, then disassemble the gear shaft along the axial direction, and finally disassemble the gear 3 along the radial direction. However, since the positioning section 21 of the positioning pin 2 is in transition fit with the pin hole 41 of the cylinder block 4, the fit is relatively tight, and the tool must be used for disassembling, and how the tool is connected with the positioning pin 2, the threaded section 23 of the positioning pin 2 of the invention is used, and a part of the threaded section 23 protrudes out of the gear shaft, so that the positioning pin 2 can be connected with a disassembling tool, and then the positioning pin 2 is pulled out of the pin hole 41 by the tool, and the gear 3 can be disassembled after the positioning pin 2 is disassembled.

In summary, compared with the prior art, the gear shaft has the following beneficial effects: the structure is simple, the manufacture is easy, and the popularization is easy; the structure is simple to assemble and convenient to disassemble, and has the dual functions of positioning and disassembling.

The foregoing descriptions of specific exemplary embodiments of the present invention are presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application to thereby enable one skilled in the art to make and utilize the invention in various exemplary embodiments and with various modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.

Claims

1. A gear shaft for positioning and mounting a gear on a cylinder block having a pin hole and a plurality of screw holes thereon, the gear shaft comprising:

the shaft body is arranged on the cylinder body and comprises a positioning hole, and the positioning hole is positioned at the center of one end of the shaft body; and

the positioning pin comprises a positioning section, the positioning section is positioned at one end of the positioning pin, and the positioning section passes through the positioning hole and is arranged in the pin hole of the cylinder body;

wherein the positioning section is used for positioning the shaft body in the pin hole of the cylinder block;

the shaft body further includes:

a mounting hole which communicates with the positioning hole and is coaxially located at a center position of the other end of the shaft body; and

a plurality of through holes uniformly distributed around the positioning holes and the mounting holes;

the locating pin further comprises:

an intermediate section located at an intermediate position of the locating pin; and

a thread section positioned at the other end of the positioning pin, wherein a part of the thread section protrudes out of the gear shaft;

the diameter of the middle section is larger than that of the positioning section and the thread section, the middle section and the thread section are arranged in the mounting hole, and the thread section is used for disassembling the positioning pin;

wherein the positioning section of the positioning pin is in transition fit with the pin hole of the cylinder block.

2. The gear shaft of claim 1, wherein the locating section of the locating pin is in clearance fit with the locating hole of the gear shaft.

3. The gear shaft of claim 1, wherein the intermediate section is a clearance fit with the mounting hole.