Adjustable gear transmission mechanism

Abstract

The utility model belongs to the technical field of diesel engine design, and relates to an adjustable gear transmission device which is provided with a supporting seat. The supporting seat comprises an inner part and an outer part; a driven gear is arranged between the inner supporting seat and the outer supporting seat; one side of the inner side supporting seat is connected with an inner pressing block, and one side of the outer side supporting seat is connected with an outer pressing block; a driving gear is arranged between the inner pressing block and the outer pressing block; the gear shaft is a stepped shaft with a hexagonal bulge at one end; the gear shaft is provided with an outer end shaft section matched with the outer pressing block and the outer side supporting seat, a middle shaft section matched with the driving gear and an inner end shaft section matched with the inner pressing block and the inner side supporting seat; the inner end shaft section and the outer end shaft section are coaxially arranged; the middle shaft section, the inner end shaft section and the outer end shaft section are eccentrically arranged, and the inner pressing block, the driving gear and the outer pressing block are connected through the gear shaft to form a structure used for adjusting the meshing clearance between the driving gear and the driven gear. Parts do not need to be replaced or repaired, working hours and material cost are saved, and working efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of diesel engines, and particularly relates to an adjustable gear transmission mechanism. Background Art

[0002] The gear transmission mechanism is an important component of the diesel engine, which is used to drive the main components such as the valve camshaft, high-pressure oil pump, oil pump, fresh water pump, seawater pump, and speed governor. The installation and operating status of the gear transmission mechanism can directly affect whether the diesel engine can run normally and whether its reliability is good.

[0003] The gear transmission mechanism has strict regulations on parameters such as the center distance and tooth clearance of the gear. If the requirements are not met, gear wear, broken teeth and related parts damage may occur. Due to factors such as the manufacturing position tolerance of the gear system mounting holes, the machining tolerance of the gears themselves, the installation and adjustment of other gear systems, it is sometimes difficult to meet the technical parameter requirements during gear installation. At this time, it may be necessary to replace the installation parts or even repair the gears, which will extend the production cycle of the entire machine, increase the production cost of parts and increase the workload of workers. Utility Model Content

[0004] The utility model aims to provide an adjustable gear transmission mechanism, which can quickly and conveniently adjust the gear side clearance during installation, thereby improving work efficiency and reducing production costs.

[0005] The utility model adopts the following technical solutions to achieve its utility model purpose:

[0006] A kind of adjustable gear transmission mechanism, the adjustable gear transmission mechanism has a support seat; the support seat is divided into two parts, an inner and outer part; a driven gear is arranged between the inner and outer parts of the support seat; an inner pressure block is connected to one side of the inner support seat, and an outer pressure block is connected to one side of the outer support seat; a driving gear for meshing with the driven gear on the support seat is arranged between the inner pressure block and the outer pressure block; the gear shaft is a stepped shaft with a hexagonal protrusion at one end; the gear shaft has an outer end shaft section that cooperates with the outer pressure block and the outer support seat, an intermediate shaft section that cooperates with the driving gear and an inner end shaft section that cooperates with the inner pressure block and the inner support seat; the diameter of the intermediate shaft section is larger than the diameter of the inner end shaft section and smaller than the diameter of the outer end shaft section; the inner end shaft section and the outer end shaft section are coaxially arranged; the intermediate shaft section is eccentrically arranged with the inner end shaft section and the outer end shaft section, and the inner pressure block, the driving gear and the outer pressure block are connected through the gear shaft to form a structure for adjusting the meshing clearance between the driving gear and the driven gear.

[0007] The outer circles of the intermediate shaft section, the inner end shaft section and the outer end shaft section of the gear shaft are eccentric by 3-5 mm.

[0008] The gear shaft is provided with an oil hole which passes through the middle shaft section and the outer end shaft section.

[0009] The inner wall surface of the outer pressure block and the outer wall surface of the outer support seat are both provided with a semicircular notch for matching with the outer end shaft section of the gear shaft.

[0010] The inner wall surface of the inner pressure block and the outer wall surface of the inner support seat are both provided with a semicircular notch for matching with the inner end shaft section of the gear shaft.

[0011] The inner hole of the driving gear is interference-fitted with a bushing, which cooperates with the gear shaft and lubricates the moving pair by conveying lubricating oil through the oil hole of the gear shaft.

[0012] The utility model discloses an adjustable gear transmission machine, which adopts the above technical scheme and has a structural design of a gear shaft, so that when installing the driving gear, the matching clearance between the driving gear and the driven gear can be adjusted by only twisting the gear shaft with a wrench, without replacing or repairing parts, thus saving labor time and material costs and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 It is a schematic diagram of the gear shaft structure;

[0015] Figure 3 It is a schematic diagram of the structure of the external pressure block;

[0016] Figure 4 It is a schematic diagram of the internal pressure block structure;

[0017] Figure 5 Schematic diagram of the support structure;

[0018] In the figure: 1, gear shaft, 1-1, outer end shaft section, 1-2, intermediate shaft section, 1-3, inner end shaft section, 1-4, hexagonal protrusion, 2, outer pressure block, 3, inner pressure block, 4, bolt, 5, driving gear, 6, support seat, 7, driven gear. DETAILED DESCRIPTION

[0019] The utility model is further described with reference to the accompanying drawings:

[0020] like Figure 1 As shown, an adjustable gear transmission mechanism, the adjustable gear transmission mechanism has a support seat 6; combined Figure 5 The support seat 6 is divided into two parts, inner and outer; a driven gear 7 is arranged between the inner and outer support seats; an inner pressure block 3 is connected to one side of the inner support seat 6, and an outer pressure block 2 is connected to one side of the outer support seat; a driving gear 5 is arranged between the inner pressure block 3 and the outer pressure block 2 to mesh with the driven gear on the support seat; Figure 2The gear shaft 1 is a stepped shaft with a hexagonal protrusion 1-4 at one end; the gear shaft has an outer end shaft section 1-1 that cooperates with the outer pressure block and the outer support seat, an intermediate shaft section 1-2 that cooperates with the driving gear, and an inner end shaft section 1-3 that cooperates with the inner pressure block and the inner support seat; the diameter of the intermediate shaft section 1-2 is larger than the diameter of the inner end shaft section 1-3, and smaller than the diameter of the outer end shaft section 1-1; the inner end shaft section 1-3 and the outer end shaft section 1-1 are coaxially arranged; the intermediate shaft section 1-2 is eccentrically arranged with the inner end shaft section and the outer end shaft section, and the inner pressure block, the driving gear, and the outer pressure block are connected through the gear shaft to form a structure for adjusting the meshing clearance between the driving gear and the driven gear.

[0021] The outer circles of the intermediate shaft section, the inner end shaft section and the outer end shaft section of the gear shaft are eccentric by 3-5 mm.

[0022] The gear shaft is provided with an oil hole which passes through the middle shaft section and the outer end shaft section.

[0023] The inner wall surface of the outer pressure block and the outer wall surface of the outer support seat are both provided with a semicircular notch for matching with the outer end shaft section of the gear shaft.

[0024] The inner wall surface of the inner pressure block and the outer wall surface of the inner support seat are both provided with a semicircular notch for matching with the inner end shaft section of the gear shaft.

[0025] The inner hole of the driving gear is interference-fitted with a bushing, which cooperates with the gear shaft and lubricates the moving pair by conveying lubricating oil through the oil hole of the gear shaft.

[0026] The utility model adjustable gear transmission device is composed of a gear shaft 1, an outer pressure block 2, an inner pressure block 3, a bolt 4, a gear 5, and a support seat 6. When installing the gear transmission device, install the gear 5 into the gear shaft 1; put the gear shaft and the gear into the support seat, put the outer end of the gear shaft into the outer semicircular hole, and put the inner end of the gear shaft into the inner semicircular hole; press the inner and outer pressure blocks on both ends of the gear shaft respectively; put 4 bolts into the 4 mounting holes of the two pressure blocks, and screw them into the threaded holes of the support seat; complete the preliminary installation of the device.

[0027] When measuring the side clearance of the matching gear, if the measured clearance is smaller than the required value, use a wrench to insert the hexagonal protrusion on the end face of the gear shaft, and turn the gear shaft clockwise to move the gear away from the matching gear; if the measured clearance is larger than the required value, turn the gear shaft counterclockwise to move the gear toward the matching gear until the clearance meets the requirements.

[0028] When the gear side clearance meets the requirements, remove the bolts on both sides in turn, apply thread lock glue, tighten the 4 mounting bolts with the specified tightening torque to complete the final installation.

Claims

1. An adjustable gear transmission mechanism, characterized in that: The adjustable gear transmission mechanism has a support seat; the support seat is divided into two parts, an inner and outer part; a driven gear is arranged between the inner and outer parts of the support seat; an inner pressure block is connected to one side of the inner support seat, and an outer pressure block is connected to one side of the outer support seat; a driving gear for meshing with the driven gear on the support seat is arranged between the inner pressure block and the outer pressure block; the gear shaft matched with the driving gear is a stepped shaft with a hexagonal protrusion at one end; the gear shaft has an outer end shaft section matched with the outer pressure block and the outer support seat, an intermediate shaft section matched with the driving gear and an inner end shaft section matched with the inner pressure block and the inner support seat; the diameter of the intermediate shaft section is larger than the diameter of the inner end shaft section and smaller than the diameter of the outer end shaft section; the inner end shaft section and the outer end shaft section are coaxially arranged; the intermediate shaft section is eccentrically arranged with the inner end shaft section and the outer end shaft section, and the inner pressure block, the driving gear and the outer pressure block are connected through the gear shaft to form a structure for adjusting the meshing clearance between the driving gear and the driven gear.

2. An adjustable gear transmission mechanism as claimed in claim 1, characterized in that: The outer circles of the intermediate shaft section, the inner end shaft section and the outer end shaft section of the gear shaft are eccentric by 3-5 mm.

3. An adjustable gear transmission mechanism as claimed in claim 1, characterized in that: The gear shaft is provided with an oil hole which passes through the middle shaft section and the outer end shaft section.

4. An adjustable gear transmission mechanism as claimed in claim 1, characterized in that: The inner wall surface of the outer pressure block and the outer wall surface of the outer support seat are both provided with a semicircular notch for matching with the outer end shaft section of the gear shaft.

5. An adjustable gear transmission mechanism as claimed in claim 1, characterized in that: The inner wall surface of the inner pressure block and the outer wall surface of the inner support seat are both provided with a semicircular notch for matching with the inner end shaft section of the gear shaft.

6. An adjustable gear transmission mechanism as claimed in claim 1, characterized in that: The inner hole of the driving gear is interference-fitted with a bushing, which cooperates with the gear shaft and lubricates the moving pair by conveying lubricating oil through the oil hole of the gear shaft.

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