An overall disassembly tool for a gear box gear set

Abstract

The utility model discloses an integral disassembly tool for a gearbox gear set, including a support plate, a positioning plate, an ejector plate, a differential fixing rod assembly, and an intermediate shaft fixing rod assembly. The positioning plate is installed on the upper side of the support plate, a clearance hole is provided in the middle of the positioning plate, and there is a spacing space between the differential gear set, the intermediate shaft gear set and the support plate. One end of the differential fixing rod assembly and the intermediate shaft fixing rod assembly are respectively fixedly connected to the differential gear set and the intermediate shaft gear set. The ejector plate is provided on the lower side of the support plate, and two fixing rod assemblies moveably pass through the support plate and the ejector plate. A first locking nut is installed outside the fixing rod assembly, and an ejector is installed on the ejector plate. The utility model solves the problem that a set of gear sets is unilaterally pulled out in an interference state, resulting in stress on the meshing surface of the gear train, which affects the later damage analysis, and ensures that the disassembled parts of the product can maintain the original state after the test.

Description

Technical Field

[0001] The utility model belongs to the technical field of gear box assembly, and in particular relates to an integral disassembly tool for a gear box gear set. Background Art

[0002] The gear disassembly tool is an auxiliary device used in the non-destructive disassembly process after the gearbox product test is completed. It accurately fixes the product components through various pre-positioning, and then disassembles the components without relative forces through various mechanisms.

[0003] In the actual production process, due to the differences and particularities of the gearbox housing design, the bearings and end covers are both interference fit, and the entire gear system is in a relatively closed state, and the components cannot be damaged during the disassembly process. At present, conventional tools on the market cannot guarantee that the two sets of shaft systems can be disassembled as a whole without stress. The commonly used method is to pull and tap synchronously, but it cannot guarantee that the tooth surface is not affected by external forces. This is a problem that needs to be solved in the actual disassembly process. Utility Model Content

[0004] In order to solve the problem that no parts can be damaged during the interference fit assembly process, and that each gear set must not be subjected to stress during disassembly, and to ensure that the actual damage conditions of the tested parts can be observed after disassembly, the utility model provides an overall disassembly tool for a gear box gear set.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] The gearbox gear set of claim 1, wherein the first and second gears are engaged and separated by a hole, the second end of the first and second gears being engaged and separated by a hole.

[0007] Furthermore, the differential fixing rod assembly and the intermediate shaft fixing rod assembly both adopt a wedge-shaped tensioning structure.

[0008] Furthermore, the wedge-shaped tensioning structure includes a fixed rod and a core rod, the first locking nut is installed on the fixed rod, the fixed rod is movably sleeved outside the core rod, the upper ends of the fixed rod and the core rod are matched through a conical surface, and the fixed rod is provided with a plurality of gaps extending axially out of the end at the conical surface, the lower end of the core rod extends from the lower end of the fixed rod, and is installed with a second locking nut, and the lower end of the fixed rod abuts against the second locking nut.

[0009] Furthermore, the gear box housing is fixed to the positioning plate via positioning pins.

[0010] Furthermore, the ejector member is an inner screw rod, which vertically passes through the plane of the ejector plate and cooperates with the thread of the ejector plate, and the top of the inner screw rod abuts against the support plate.

[0011] Furthermore, the differential fixing rod assembly and the intermediate shaft fixing rod assembly are parallel to each other and perpendicular to the support plate.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model discloses an overall disassembly tool for the gear box gear set, which clamps the gear shaft by the tensioning force of two sets of gear shaft fixing rods and is fixed to the ejection plate by external threads, thus solving the problem that a set of gear sets is pulled out unilaterally in an interference state, causing stress on the meshing surface of the gear train and affecting the subsequent damage analysis, and ensures that the disassembled parts of the product can maintain the original state after the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a cross-sectional view of a tool for disassembling a gearbox gear set in its entirety in use state of the utility model;

[0015] Figure 2 It is a structural schematic diagram of the intermediate shaft fixing rod in the utility model;

[0016] Figure 3 The utility model is a structural schematic diagram of a tool for disassembling a gear box gear set as a whole.

[0017] Markings in the figure: 1-support plate; 2-positioning plate; 3-differential fixing rod; 4-first core rod; 5-ejection plate; 6-intermediate shaft fixing rod; 7-second core rod; 8-positioning pin; 9-differential fixing rod locking nut; 10-intermediate shaft fixing rod locking nut; 11-first core rod locking nut; 12-second core rod locking nut; 13-first spacing space; 14-second spacing space; 15-inner screw; 16-differential gear set; 17-intermediate shaft gear set; 18-housing; 19-gap. DETAILED DESCRIPTION

[0018] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0019] After the test, the gearbox products are as follows: Figure 1 As shown, it mainly includes a housing 18, a differential gear set 16, and an intermediate shaft gear set 17. The differential gear set 16 and the intermediate shaft gear set 17 are meshed with each other and installed in the housing 18. The bearings and end covers of the differential gear set 16 and the intermediate shaft gear set 1 are interference fit, and the whole gear system is in a relatively closed state. After the test is completed, the differential gear set 16 and the intermediate shaft gear set 17 are usually taken out by pulling and knocking synchronously. However, this disassembly method cannot ensure that the tooth surface of the gear is not affected by external force, and the gear components are easily damaged during the disassembly process.

[0020] The utility model discloses an overall disassembly tool for a gear box gear set. Figure 1 and Figure 3 As shown, it mainly includes a support plate 1, a positioning plate 2, an ejector plate 5, a differential fixing rod assembly, and an intermediate shaft fixing rod assembly. Among them:

[0021] The support plate 1 is the installation base of the entire disassembly tooling, and the main body is a flat plate structure.

[0022] The positioning plate 2 is fixedly mounted on the upper side of the support plate 1, and a clearance hole is provided in the middle thereof, and the radial dimension of the clearance hole is larger than the radial dimension of the differential gear set 16 and the intermediate shaft gear set 17. The clearance hole is mainly used to allow the differential gear set 16 and the intermediate shaft gear set 17 to fall onto the support plate 1 without hindrance. A positioning pin 8 is installed on the positioning plate 2, which is used to fix the housing 18 of the gear box when in use.

[0023] There is a certain interval between the differential gear set 16 and the support plate 1, as well as between the intermediate shaft gear set 17 and the support plate 1, to ensure the pull-out distance. A first interval space 13 is formed between the differential gear set 16 and the support plate 1 to accommodate the differential gear set 16 that falls after disassembly. A second interval space 14 is formed between the intermediate shaft gear set 17 and the support plate 1 to accommodate the intermediate shaft gear set 17 that falls after disassembly.

[0024] The differential fixing rod assembly and the intermediate shaft fixing rod assembly are parallel to each other and perpendicular to the support plate 1. The upper end of the differential fixing rod assembly extends into the bearing of the differential gear set 16 and is fixedly connected to the differential gear set 16, and the upper end of the intermediate shaft fixing rod assembly extends into the bearing of the intermediate shaft gear set 17 and is fixedly connected to the intermediate shaft gear set 17.

[0025] Specifically, the differential fixing rod assembly and the intermediate shaft fixing rod assembly both adopt a wedge-shaped tensioning structure, using the pre-tightening force of the core rod to expand the fixing rod head, clamp the gear shaft, and then fix it to the top plate through external threads and nuts to fix the gear set. Figure 2Taking the structure of the intermediate shaft fixing rod assembly shown as an example, the wedge-shaped tensioning structure includes an intermediate shaft fixing rod 6 and a second core rod 7. The intermediate shaft fixing rod locking nut 10 is installed on the intermediate shaft fixing rod 6. The intermediate shaft fixing rod 6 is movably sleeved outside the second core rod 7. The upper ends of the intermediate shaft fixing rod 6 and the second core rod 7 are matched through a conical surface, and the intermediate shaft fixing rod 6 is provided with a plurality of slits 19 extending axially out of the end at the conical surface. The lower end of the second core rod 7 extends from the lower end of the intermediate shaft fixing rod 6 and is installed with a second core rod locking nut 12. The lower end of the intermediate shaft fixing rod 6 abuts against the second core rod locking nut 12. The differential fixing rod assembly mainly includes a differential fixing rod 3, a first core rod 4, a differential fixing rod locking nut 9, and a first core rod locking nut 11. The differential fixing rod assembly and the intermediate shaft fixing rod assembly adopt the same wedge-shaped tensioning structure, which will not be described here.

[0026] The ejector plate 5 is arranged on the lower side of the support plate 1, and the lower ends of the two fixing rods are movably arranged on the same support plate 1 and the ejector plate 5 respectively. The outer side of the differential fixing rod 3 below the ejector plate 5 is cooperated with the installation of the differential fixing rod locking nut 9, and the outer side of the intermediate shaft fixing rod 6 below the ejector plate 5 is cooperated with the installation of the intermediate shaft fixing rod locking nut 10.

[0027] The ejector plate 5 is provided with an ejector member for driving the ejector plate 5 to move downward. Specifically, the ejector member 5 is an inner screw 15, which vertically passes through the plane of the ejector plate 5, and the top of the inner screw 15 abuts against the support plate 1, and the inner screw 15 is threadedly matched with the ejector plate 5.

[0028] When in use: first pre-assemble the differential fixing rod 3, the first core rod 4 and the first core rod locking nut 11 into the differential fixing rod assembly, pre-assemble the intermediate shaft fixing rod 6, the second core rod 7 and the second core rod locking nut 12 into the intermediate shaft fixing rod assembly, and keep the differential fixing rod locking nut 9 and the intermediate shaft fixing rod locking nut 10 in a loose state; then insert the two fixing rod assemblies through the ejection plate 5, the support plate 1 and the positioning plate 2 into the differential gear shaft and the intermediate shaft of the gear box assembly, and tighten the first core rod locking nut 11 and the second core rod locking nut 12 after they are in place, so that the head of the fixing rod is enlarged to clamp the gear shaft, and then tighten the differential fixing rod locking nut 9 and the intermediate shaft fixing rod locking nut 10 to fix the fixing rod on the ejection plate; finally, use the inner screw 15 to apply force at the center of the ejection plate 5 to pull out the two sets of gear sets, and the gear sets fall on the recessed groove and flat surface processed on the support plate.

[0029] In summary, the utility model provides overall support through the support plate, and at the same time ensures that the entire gear set will not fall after being disassembled, the positioning plate ensures the precise positioning of the gear box as a whole, especially the housing, and the differential fixing rod and the intermediate shaft fixing rod allow the fixed head to open and clamp the shaft system gear shaft through the contraction of the core rod, so that the relative position of the differential and the intermediate shaft gear set remains unchanged, thereby ensuring that the meshing surface will not be stressed during the disassembly and assembly process, and the entire gear set is pulled out through the force of the ejector rod thread of the ejector plate. The utility model ensures that in the case of interference installation of the bearing seat and the outer ring of the bearing, the entire gear set will not be subjected to meshing force on the tooth surface during the pulling process due to the asynchronism of the two sets of gear trains.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent replacement and improvement made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A tool for disassembling a gearbox gear set as a whole, characterized in that: The gear assembly comprises a support plate, a positioning plate, an ejector plate, a differential fixing rod assembly and an intermediate shaft fixing rod assembly, wherein the positioning plate is installed on the upper side of the support plate and is used to fix the gear box housing, a clearance hole is provided in the middle of the positioning plate for allowing the differential gear set and the intermediate shaft gear set to fall to the support plate, an interval space is provided between the differential gear set and the support plate, and between the intermediate shaft gear set and the support plate, the interval space is used to accommodate the differential gear set and the intermediate shaft gear set that fall after disassembly, one end of the differential fixing rod assembly is fixedly connected to the differential gear set, one end of the intermediate shaft fixing rod assembly is fixedly connected to the intermediate shaft gear set, the ejector plate is arranged on the lower side of the support plate, the other ends of the two fixing rod assemblies respectively move through the same support plate and the ejector plate, and the outer sides of the fixing rod assemblies on the lower side of the ejector plate are respectively fitted with first locking nuts, and an ejector member for driving the ejector plate to move downward is installed on the ejector plate.

2. The overall disassembly tool for a gearbox gear set according to claim 1, characterized in that: The differential fixing rod assembly and the intermediate shaft fixing rod assembly both adopt a wedge-shaped tensioning structure.

3. The overall disassembly tool for a gearbox gear set according to claim 2, characterized in that: The wedge-shaped tensioning structure includes a fixed rod and a core rod. The first locking nut is installed on the fixed rod. The fixed rod is movably sleeved outside the core rod. The upper ends of the fixed rod and the core rod are matched through a conical surface, and the fixed rod is provided with a plurality of gaps extending axially out of the end at the conical surface. The lower end of the core rod extends from the lower end of the fixed rod and is installed with a second locking nut. The lower end of the fixed rod abuts against the second locking nut.

4. The overall disassembly tool for a gearbox gear set according to claim 1, characterized in that: The gear box housing is fixed to the positioning plate through positioning pins.

5. The overall disassembly tool for a gearbox gear set according to claim 1, characterized in that: The ejector member is an inner screw rod, which vertically passes through the plane of the ejector plate and cooperates with the thread of the ejector plate, and the top of the inner screw rod abuts against the support plate.

6. The overall disassembly tool for a gearbox gear set according to claim 1, characterized in that: The differential fixing rod assembly and the intermediate shaft fixing rod assembly are parallel to each other and perpendicular to the support plate.

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