CN114484106A

CN114484106A - Fastening assembly and speed reducer exhaust pipe adopting same

Info

Publication number: CN114484106A
Application number: CN202210252355.4A
Authority: CN
Inventors: 裴培; 王占军; 温秀峰; 吴迪; 周敏; 张小星
Original assignee: Shanxi Pingyang Industry Machinery Co Ltd
Current assignee: Shanxi Pingyang Industry Machinery Co Ltd
Priority date: 2022-03-15
Filing date: 2022-03-15
Publication date: 2022-05-13

Abstract

The invention relates to a related part of a speed reducer, belongs to the technical field of mechanical design, and particularly relates to a fastening assembly and a speed reducer exhaust pipe adopting the same. The technical problem of play probably appears in outer exhaust pipe, interior exhaust pipe and the bush of present reduction gear blast pipe receiving axial force, radial force and the influence of vibration owing to lack stop gear is solved. A fastening assembly comprises an exhaust pipe semicircular ring and an exhaust pipe clamping ring, wherein the section of the exhaust pipe semicircular ring is a horizontal section and an L-shaped section connected with one end of the horizontal section; the other end of the horizontal section extends downwards to form a step structure, and one end of the horizontal section is connected with the top of the vertical part of the L-shaped section; the exhaust pipe snap ring is of a circular ring-shaped structure, and the ring surface on one side of the circular ring-shaped structure extends horizontally along the axial direction to form an extension section. After the exhaust pipe semicircular ring and the exhaust pipe clamping ring are added, the inner and outer exhaust pipes can be ensured not to fall off during assembly, and damage is avoided; and the play between the parts can be effectively prevented.

Description

Fastening assembly and speed reducer exhaust pipe adopting same

Technical Field

The invention relates to a related part of a speed reducer, belongs to the technical field of mechanical design, and particularly relates to a fastening assembly and a speed reducer exhaust pipe adopting the same.

Background

The speed reducer of a certain type of product mainly comprises a shell, a middle support, a transmission gear, a lubricating oil tank, a lubricating oil pipeline, a motor output shaft, a fuel pump output shaft, a sea water pump output shaft, an oil return pump, a booster pump output shaft, an exhaust pipe component, an oil pipe, a bearing and other parts, wherein the exhaust pipe component is used for cooling and discharging waste gas, and therefore a cooling water channel and a high-temperature gas channel are designed in the component and are isolated from a lubricating oil cavity. An outer exhaust pipe of an exhaust pipe part in the original design drawing is directly arranged on an inner exhaust pipe, the outer exhaust pipe and the inner exhaust pipe are only sealed through an O-shaped ring, a fixing device is lacked, and the outer exhaust pipe falls off from the inner exhaust pipe if errors occur during assembly, so that damage is caused; when a power test is carried out, the stress condition of the exhaust pipe is complex, under the combined action of cooling water and high-temperature fuel gas, the outer exhaust pipe, the inner exhaust pipe and the lining are influenced by axial force, radial force and vibration, and due to the fact that the test time is long, the exhaust pipe, the inner exhaust pipe and the lining are likely to move, the matched parts of all parts are damaged, even the air water path and the oil lubricating path are communicated, the speed reducer and related parts of an engine, a fuel pump and an oil lubricating pump which are connected with the speed reducer are scrapped, and the test process is influenced.

Specifically, the original exhaust pipe structure comprises an outer exhaust pipe, an inner exhaust pipe sleeved inside the outer exhaust pipe, and an exhaust pipe bushing sleeved inside the inner exhaust pipe; a first sealing ring is fixed between the inner exhaust pipe and the outer exhaust pipe, and a second sealing ring is fixed between the inner exhaust pipe and the lining; the outer wall of the inner exhaust pipe is provided with an annular boss which props against one end of the outer exhaust pipe; one end of the lining is limited by a check ring positioned in the inner exhaust pipe.

Disclosure of Invention

The invention provides a fastening assembly and a reducer exhaust pipe adopting the same, aiming at solving the technical problem that the play possibly occurs when the outer exhaust pipe, the inner exhaust pipe and the bush of the existing reducer exhaust pipe are influenced by axial force, radial force and vibration due to the lack of a limiting mechanism.

The fastening assembly is realized by adopting the following technical scheme: a fastening assembly comprises an exhaust pipe semicircular ring and an exhaust pipe clamping ring, wherein the section of the exhaust pipe semicircular ring is a horizontal section and an L-shaped section connected with one end of the horizontal section; the other end of the horizontal section extends downwards to form a step structure, and one end of the horizontal section is connected with the top of the vertical part of the L-shaped section; the exhaust pipe snap ring is of a circular ring-shaped structure, and the ring surface on one side of the circular ring-shaped structure extends horizontally along the axial direction to form an extension section.

The extension section of the exhaust pipe snap ring can be sleeved outside the horizontal part of the L-shaped section.

The speed reducer exhaust pipe is realized by adopting the following technical scheme: a reducer exhaust pipe comprises an outer exhaust pipe, an inner exhaust pipe sleeved inside the outer exhaust pipe, and an exhaust pipe bushing sleeved inside the inner exhaust pipe; a first sealing ring is fixed between the inner exhaust pipe and the outer exhaust pipe, and a second sealing ring is fixed between the inner exhaust pipe and the exhaust pipe bushing; the outer wall of the inner exhaust pipe is provided with an annular limiting boss which props against one end of the outer exhaust pipe; also included is a fastener assembly; a semicircular arc-shaped clamping groove is formed in the outer wall of the outer exhaust pipe at a position close to the limiting boss, the exhaust pipe semicircular ring is sleeved on the outer wall of the outer exhaust pipe, the step structure of the exhaust pipe semicircular ring is clamped in the clamping groove, the horizontal section of the exhaust pipe semicircular ring is tightly attached to the outer wall of the outer exhaust pipe, and the vertical part of the L-shaped section of the exhaust pipe semicircular ring is tightly attached to the rear part of the limiting boss; the exhaust pipe snap ring is sleeved on the outer wall of the inner exhaust pipe, and the extension section of the exhaust pipe snap ring is sleeved on the outer side of the horizontal part of the L-shaped section of the exhaust pipe semicircular ring.

The exhaust pipe semicircular ring can fasten the inner exhaust pipe and the outer exhaust pipe mutually, and the exhaust pipe snap ring fastens the exhaust pipe semicircular ring, so that the condition that the exhaust pipe of the speed reducer moves when being subjected to external force is effectively avoided; and the inner and outer exhaust pipes are not easy to fall off during assembly.

The invention has the beneficial effects that:

(1) the invention considers the safety of assembly and the reliability of test

After the exhaust pipe semicircular ring and the exhaust pipe clamping ring are added, the inner and outer exhaust pipes can be ensured not to fall off during assembly, and damage is avoided; meanwhile, when the speed reducer is assembled in a power device power test, the parts can be effectively prevented from moving, and related parts are prevented from being scrapped.

(2) Simple structure, convenient assembly and disassembly and low cost

The newly-added parts are small in external size, simple in structure and convenient to mount and dismount, operation time can be effectively saved, interference with other parts is avoided after mounting, machining cost is saved, and machining period is shortened.

(3) Saves a great deal of cost for product development

Through repeated disassembly and assembly and test verification, the production improvement can avoid the cost for re-producing the speed reducer, the engine, the variable fuel pump and the lubricating oil pump caused by the damage of parts, save a large amount of time and be beneficial to improving the research and development progress of products.

Drawings

FIG. 1 is a schematic view of the structure of the exhaust pipe.

FIG. 2 is a schematic view of a modified exhaust pipe assembly.

FIG. 3 is a semi-circular ring structure of the exhaust pipe.

Fig. 4 is a cross-sectional view a-a in fig. 3.

FIG. 5 is a schematic view of an exhaust pipe clamp ring configuration.

1-an outer exhaust pipe, 2-an inner exhaust pipe, 3-an exhaust pipe bushing, 4-a retainer ring, 5-a first sealing ring, 6-a second sealing ring, 7-an exhaust pipe semicircular ring and 8-an exhaust pipe clamping ring; 21-a limit boss, 71-a horizontal section, 72-a step structure, 73-an L-shaped section and 81-an extension section.

Detailed Description

Example 1

As shown in fig. 3, 4 and 5, the fastening assembly comprises an exhaust pipe semicircular ring 7 and an exhaust pipe clamping ring 8, wherein the section of the exhaust pipe semicircular ring 7 is a horizontal section 71 and an L-shaped section 73 connected with one end of the horizontal section 71; the other end of the horizontal section 73 extends downwards to form a step structure 72, and one end of the horizontal section 71 is connected with the top of the vertical part of the L-shaped section 73; the exhaust pipe snap ring 8 is of a circular ring-shaped structure, and the ring surface on one side of the circular ring-shaped structure horizontally extends along the axial direction to form an extension section 81.

Example 2

The inner diameter of the exhaust pipe snap ring 8 is 89mm, the outer diameter is 94mm, and the thickness is 10.9 mm.

Example 3

A reducer exhaust pipe comprises an outer exhaust pipe 1, an inner exhaust pipe 2 sleeved inside the outer exhaust pipe 1, and an exhaust pipe bushing 3 sleeved inside the inner exhaust pipe 2; a first sealing ring 5 is fixed between the inner exhaust pipe and the outer exhaust pipe, and a second sealing ring 6 is fixed between the inner exhaust pipe 2 and the exhaust pipe lining 3; an annular limiting boss 21 is arranged on the outer wall of the inner exhaust pipe 2 to support one end of the outer exhaust pipe 1; also included is a fastener assembly; a semicircular arc-shaped clamping groove is formed in the outer wall of the outer exhaust pipe 1 at a position close to the limiting boss 21, the exhaust pipe semicircular ring 7 is sleeved on the outer wall of the outer exhaust pipe 1, the step structure of the exhaust pipe semicircular ring 7 is clamped in the clamping groove, the horizontal section of the exhaust pipe semicircular ring 7 is tightly attached to the outer wall of the outer exhaust pipe 1 and the radial end face of the limiting boss, and the vertical part of the L-shaped section 73 of the exhaust pipe semicircular ring 7 is tightly attached to the rear part of the limiting boss 21; the exhaust pipe snap ring 8 is sleeved on the outer wall of the inner exhaust pipe 2, and the extension section 81 of the exhaust pipe snap ring 8 is sleeved on the outer side of the horizontal part of the L-shaped section 73 of the exhaust pipe semi-circular ring 7. The exhaust pipe also comprises a check ring 4 positioned in the inner exhaust pipe 2; the inner wall of the inner exhaust pipe 2 is provided with a groove, and the retainer ring 4 is partially embedded into the groove and limits one end of the inner exhaust pipe bushing 3.

Example 4

The exhaust pipe snap ring 8 and the inner exhaust pipe 2 are in interference fit.

In actual installation, the exhaust pipe clamping ring is propped against the speed reducer shell, so that the clamping ring can be further installed and fastened, and meanwhile, the exhaust pipe is prevented from falling off or moving among all parts.

The structure of the original exhaust pipe part is shown in figure 1 and comprises an inner exhaust pipe, an outer exhaust pipe, an exhaust pipe bushing, a retainer ring, a first sealing ring and a second sealing ring. During assembly, the inner exhaust pipe is respectively matched with the outer exhaust pipe and the exhaust pipe bushing, and the matching surface is required to meet the requirements that an airtight test under the air pressure of 0.5MPa is not leaked, and a strength test under the hydraulic pressure of 4MPa is not leaked. After the strength and the air tightness test of the exhaust pipe meet the requirements, the exhaust pipe can participate in the assembly of the speed reducer and the power test of the power device. As can be seen from the figure, the inner exhaust pipe and the outer exhaust pipe are not firmly connected, and are easy to fall off during assembly, thus damaging parts; the test is easy to cause the play during the test, which leads to the through of the air-water path, the through of the air-water path and the lubricating oil path, and causes the scrapping of the speed reducer and the related parts of the engine, the fuel pump and the lubricating oil pump which are connected with the speed reducer, the repeated processing of the parts needs to consume a large amount of time and cost, the test process is influenced, and the structure of the test is urgently needed to be improved. The improved exhaust pipe component structure is shown in fig. 2, and the problems can be effectively solved by designing a new fixing device (an exhaust pipe semicircular ring and an exhaust pipe clamping ring) and processing a new fixing clamping groove on the outer exhaust pipe. The exhaust pipe semicircular ring and the exhaust pipe clamping ring are shown in figures 3, 4 and 5 in detail.

On the basis of researching the structure of the existing speed reducer, the invention combines the practical situation, finishes the structural improvement of the exhaust pipe component after consulting with relevant departments, and designs the exhaust pipe semicircular ring and the exhaust pipe snap ring. The improved exhaust pipe component is shown in fig. 2, and an exhaust pipe semicircular ring (the structure is shown in fig. 3 and 4) and an exhaust pipe snap ring (the structure is shown in fig. 5) are added on the basis of the original structure. During assembly, an inner exhaust pipe, an outer exhaust pipe, an exhaust pipe bushing, a check ring and a sealing ring in an exhaust pipe part are installed firstly, then a semicircular ring of the exhaust pipe and an exhaust pipe clamping ring are installed at the matching positions of the inner exhaust pipe and the outer exhaust pipe respectively to complete the assembly of the whole part, then subsequent airtight and strength tests are carried out, and after the airtight and strength tests are qualified, the airtight and strength tests participate in the assembly of the speed reducer and the assembly of the power device, and then the success rate tests are completed.

At present, the improvement measure is implemented on a drawing, new parts are produced according to the design drawing and are applied to products, and through repeated dismounting and test verification, the defects of the original structural design are effectively overcome, the fastening connection of the inner exhaust pipe and the outer exhaust pipe is ensured, and therefore the assembly safety and the working reliability of the whole part are ensured.

Claims

1. The fastening assembly is characterized by comprising an exhaust pipe semicircular ring (7) and an exhaust pipe clamping ring (8), wherein the section of the exhaust pipe semicircular ring (7) is a horizontal section (71) and an L-shaped section (73) connected with one end of the horizontal section (71); the other end of the horizontal section (73) extends downwards to form a step structure (72), and one end of the horizontal section (71) is connected with the top of the vertical part of the L-shaped section (73); the exhaust pipe clamping ring (8) is of a circular ring-shaped structure, and the ring surface on one side of the circular ring-shaped structure horizontally extends along the axial direction to form an extension section (81).

2. A fastener assembly according to claim 1, characterised in that the exhaust pipe collar (8) has an internal diameter of 89mm, an external diameter of 94mm and a width of 10.9 mm.

3. A reducer exhaust pipe comprises an outer exhaust pipe (1), an inner exhaust pipe (2) sleeved in the outer exhaust pipe (1), and an exhaust pipe bushing (3) sleeved in the inner exhaust pipe (2); a first sealing ring (5) is fixed between the inner exhaust pipe and the outer exhaust pipe, and a second sealing ring (6) is fixed between the inner exhaust pipe (2) and the exhaust pipe lining (3); an annular limiting boss (21) is arranged on the outer wall of the inner exhaust pipe (2) to support one end of the outer exhaust pipe (1); a fastener assembly according to claim 1; a semicircular arc-shaped clamping groove is formed in the position, close to the limiting boss (21), on the outer wall of the outer exhaust pipe (1), a semicircular ring (7) of the exhaust pipe is sleeved on the outer wall of the outer exhaust pipe (1), a step structure of the semicircular ring (7) of the exhaust pipe is clamped in the clamping groove, the horizontal section of the semicircular ring (7) of the exhaust pipe is tightly attached to the outer wall of the outer exhaust pipe (1), and the vertical part of the L-shaped section (73) of the semicircular ring (7) of the exhaust pipe is tightly attached to the rear part of the limiting boss (21); the exhaust pipe snap ring (8) is sleeved on the outer wall of the inner exhaust pipe (2), and the extension section (81) of the exhaust pipe snap ring (8) is sleeved on the outer side of the horizontal part of the L-shaped section (73) of the exhaust pipe semicircular ring (7).

4. A reducer exhaust pipe according to claim 3, characterised in that the exhaust pipe snap ring (8) is in interference fit with the inner exhaust pipe (2).

5. A reducer outlet pipe according to claim 3 or 4, further comprising a retainer ring (4) located inside the inner outlet pipe (2); a groove is formed in the inner wall of the inner exhaust pipe (2), and the retainer ring (4) is partially embedded into the groove and limits one end of the inner exhaust pipe bushing (3).