Tool for quickly disassembling oil guide cover in transmission input shaft small assembly

Abstract

The invention discloses a tool for rapidly disassembling an oil guide cover in a transmission input shaft small assembly, and relates to the technical field of vehicle transmission input shaft small assembly disassembling, the tool comprises a disassembling tool, the disassembling tool comprises a punching rod and a wedge-shaped sliding block, the lowest end of the punching rod is provided with an inclined sliding groove, and the wedge-shaped sliding block is arranged in the inclined sliding groove; the wedge-shaped sliding block is connected to the inclined sliding groove through a fixing pin. A shaft system is arranged above the oil guide cover, a tightening bolt is arranged at the top of the shaft system, and the disassembling tool can penetrate through the tightening bolt to extend into the shaft system; when the oil guide cover is disassembled, a special workbench is not needed, a tightening bolt does not need to be disassembled, the tightening bolt is protected, then a chemical reagent does not need to be used for cleaning residual thread glue on an opponent piece, the disassembling efficiency is improved, meanwhile, consumables are saved, and use of the chemical reagent is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of disassembly of a vehicle transmission input shaft subassembly, in particular to a tool for quickly disassembling an oil guide cover in a transmission input shaft subassembly. Background Art

[0002] The input shaft subassembly of the vehicle transmission plays an important role in multi-stage speed change. As the transmission output carrier, the inner cavity of the input shaft overflows the gear lubricating oil to each level of transmission teeth through the oil guide cover, which is used to lubricate the meshing between the teeth, reduce the wear of the tooth surface, increase the life of the gears and reduce the meshing noise. The process of bench verification on the automated assembly line of the input shaft subassembly is as follows: the input shaft subassembly is fixed on the automatic connection pallet transport station - the robot clamps it into the main housing of the transmission - the oil guide cover is pressurized to the input shaft subassembly pallet positioning hole - the remaining parts are added to the transmission assembly state - the transmission assembly is transported to the bench for NVH verification.

[0003] During the bench test, the oil guide cover in the input shaft subassembly needs to be removed. The purpose is that after eliminating the NVH problem, the input shaft subassembly needs to be reassembled on the automated assembly line to assemble the transmission assembly and re-run the bench test. The installation hole of the oil guide cover is exactly the installation hole of the tray of the input shaft subassembly on the automatic connection line, so the oil guide cover needs to be pressed out first, and then the transmission assembly is reinstalled for bench testing. The oil guide cover needs to be removed in the following situations:

[0004] 1. When the bench is engaged, it is found that the small assembly itself has NVH problems. The small assembly needs to be disassembled and broken up, and the parts without problems are reused. At this time, the oil guide cover needs to be removed;

[0005] 2. When the test bench is engaged, it is found that there are NVH problems with the meshing shaft system with the small assembly. The small assembly can be reused. At this time, the oil guide cover also needs to be removed.

[0006] For the second type of situation where the oil guide cover needs to be removed, when removing the oil guide cover, first move the input shaft subassembly to a special disassembly station, remove the tightening bolts, insert the punch rod from the tightening bolt side, and use a hammer to hit the punch rod to push the oil guide cover out of the input shaft. This process has the following shortcomings:

[0007] 1. A special workbench is required for disassembly. Due to the complex appearance of the input shaft assembly, a special workbench is required for auxiliary positioning and clamping during disassembly to further disassemble the oil guide cover;

[0008] 2. Tighten the bolts and scrap them directly. The threaded part of the bolts has sealant to increase the tightening force and lock the tapered bearings on the shaft system. The bolts fail after disassembly;

[0009] 3. When tightening the bolts, the threads on the handpiece need to be cleaned. First, use a needle to manually pick out most of the glue, and then use a chemical cleaning agent to remove the residual glue. The process is time-consuming and labor-intensive and uses chemical agents;

[0010] 4. The rework cycle is long and the product needs to be moved to a dedicated workstation during disassembly. Summary of the invention

[0011] The object of the present invention is to provide a tool for quickly disassembling an oil guide cover in a transmission input shaft subassembly, so as to solve the problems raised in the above-mentioned background technology.

[0012] To achieve the above object, the present invention provides the following technical solution: a tool for quickly disassembling an oil guide cover in a transmission input shaft subassembly, comprising a disassembly tool, the disassembly tool comprising a punch rod and a wedge-shaped slider, an oblique slide groove is provided at the lower end of the punch rod, and the wedge-shaped slider is connected to the oblique slide groove by a fixing pin;

[0013] A shaft system is provided above the oil guide cover, a tightening bolt is provided on the top of the shaft system, and the disassembly tool can pass through the tightening bolt and extend into the shaft system;

[0014] The wedge-shaped slider can move in the axial direction of the punch.

[0015] Preferably, the punch rod is an elongated cylindrical rod body, the diameter of the punch rod is smaller than the diameter of the center hole of the tightening bolt, and the diameter of the center hole of the tightening bolt is equal to the diameter of the center hole of the oil guide cover.

[0016] Preferably, an umbrella handle is provided at the top of the punch rod, and a shaft journal is provided at the lower part of the umbrella handle.

[0017] Preferably, the bottom of the punch rod is provided with a flat groove perpendicular to the axial direction of the punch rod, an inclined slide groove is opened above the flat groove and along the axial direction of the punch rod, ear-shaped grooves are opened above the flat groove and are symmetrically arranged on both sides of the inclined slide groove, a pin hole is opened in the middle of the ear-shaped groove, and the fixing pin is tightly connected in the pin hole.

[0018] Preferably, the lower part of the wedge-shaped slider has a cylindrical base, the height of the base is the same as the depth of the flat groove, a wedge-shaped bar is provided above the base, the hypotenuse angle of the wedge-shaped bar is the same as the angle of the inclined slide groove, a waist-shaped groove is provided at a position parallel to the wedge surface of the wedge-shaped bar and offset inwardly toward the wedge-shaped bar body, the fixing pin passes through the waist-shaped groove and the inclined slide groove to connect the punch rod with the wedge-shaped slider, and the wedge-shaped slider can slide in a direction parallel to the waist-shaped groove under the joint constraints of the fixing pin and the inclined slide groove.

[0019] Preferably, the cylindrical generatrix of the punch rod and the lateral generatrix of the wedge-shaped slider together form an effective punch radius, and the effective punch radius can follow the movement of the wedge-shaped slider in the direction of the punch rod axis. Compared with the prior art, the present invention has the following beneficial effects:

[0020] When the oil guide cover is disassembled by the present invention, a special workbench is not required, and the tightening bolts do not need to be disassembled, so the tightening bolts are protected, and there is no need to use chemical reagents to clean the residual thread glue on the opponent parts. While improving the disassembly efficiency, consumables are saved and the use of chemical reagents is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the actual working condition of the present invention;

[0022] Figure 2 It is a schematic diagram of the explosion structure of the present invention;

[0023] Figure 3 It is a schematic diagram of the punch structure of the present invention;

[0024] Figure 4 This is a schematic diagram of the wedge-shaped slider structure of the present invention;

[0025] Figure 5 This is a schematic diagram of the pre-working state of the present invention;

[0026] Figure 6 This is a schematic diagram of the normal working state of the present invention.

[0027] In the figure: disassembly tool 01, tightening bolt 02, shaft system 03, oil guide cover 04, effective punch radius 05, punch rod 1, wedge-shaped slider 2, fixing pin 3, inclined slide groove 11, umbrella handle 12, journal 13, flat groove 14, ear-shaped groove 15, pin hole 16, base 21, wedge-shaped strip 22, waist-shaped groove 23. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] See also Figures 1 to 6 The present invention provides a technical solution: a tool for quickly disassembling an oil guide cover in a transmission input shaft subassembly, comprising a disassembly tool 01, wherein the disassembly tool 01 comprises a punch rod 1 and a wedge-shaped slider 2, wherein an oblique slide groove 11 is provided at the lower end of the punch rod 1, and the wedge-shaped slider 2 is connected to the oblique slide groove 11 through a fixing pin 3;

[0030] A shaft system 03 is provided above the oil guide cover 04, a tightening bolt 02 is provided on the top of the shaft system 03, and the disassembly tool 01 can pass through the tightening bolt 02 and extend into the shaft system 03;

[0031] The wedge-shaped slide block 2 can move in the axial direction of the punch 1 .

[0032] In this embodiment, the punch rod 1 is a long cylindrical rod body, the diameter of the punch rod 1 is smaller than the diameter of the center hole of the tightening bolt 02 , and the diameter of the center hole of the tightening bolt 02 is equal to the diameter of the center hole of the oil guide cover 04 .

[0033] In this embodiment, an umbrella handle 12 is provided at the top of the punch rod 1, and a shaft neck 13 is provided at the lower part of the umbrella handle 12. The shaft neck 13 cooperates with the central hole wall of the tightening bolt 02 to perform initial positioning of the tool 01.

[0034] In this embodiment, a flat groove 14 perpendicular to the axial direction of the punch rod 1 is provided at the bottom of the punch rod 1, an inclined groove 11 is provided above the flat groove 14 and along the axial direction of the punch rod 1, and ear-shaped grooves 15 symmetrically arranged on both sides of the inclined groove 11 are provided above the flat groove 14, a pin hole 16 is provided in the middle of the ear-shaped groove 15, and the fixing pin 3 is tightly connected in the pin hole 16.

[0035] In this embodiment, the lower part of the wedge-shaped slider 2 is provided with a cylindrical base 21, the height of the base 21 is the same as the depth of the flat groove 14, and a wedge-shaped bar 22 is provided above the base 21. The hypotenuse angle of the wedge-shaped bar 22 is the same as the angle of the inclined slide groove 11, and a waist-shaped groove 23 is provided at a position parallel to the wedge surface of the wedge-shaped bar 22 and offset inwardly toward the body of the wedge-shaped bar 22. The fixing pin 3 passes through the waist-shaped groove 23 and the inclined slide groove 11 to connect the punch rod 1 with the wedge-shaped slider 2. Under the joint constraints of the fixing pin 3 and the inclined slide groove 11, the wedge-shaped slider 2 can slide in a direction parallel to the waist-shaped groove 23.

[0036] In this embodiment, the effective punch radius 05 is formed by the cylindrical generatrix of the punch rod 1 and the side generatrix of the wedge-shaped slider 2. The effective punch radius 05 can follow the movement of the wedge-shaped slider 2 in the axial direction of the punch rod 1. When the disassembly tool 01 is in the pre-working state, the wedge-shaped slider 2 is constrained by its own weight and naturally falls to the lowest point in the axial direction of the disassembly tool 01 under the joint action of the positioning pin 3 and the inclined slide groove 11. At this time, the effective punch radius 05 of the disassembly tool 01 is the smallest;

[0037] When the disassembly tool 01 is in a normal working state, the wedge-shaped slider 2 rises to the highest point in the axial direction of the disassembly tool 01. At this time, the effective punch radius 05 of the disassembly tool 01 is the largest.

[0038] Working principle: Through the punch rod 1, the naturally hanging wedge-shaped slider 2 is extended into the center hole of the tightening bolt 02. When the journal 13 on the punch rod 1 passes through the center hole of the tightening bolt 02, the punch rod 1 is radially translated so that the journal 13 is tangent to the center hole wall of the tightening bolt 02, and the center line of the inclined slide 11 is parallel to the tangent line. After the base 21 of the wedge-shaped slider 2 contacts the bottom of the oil guide cover 04, the wedge-shaped slider 2 is left stationary to achieve the initial positioning of the wedge-shaped slider 2. At this time, the disassembly tool 01 is in the pre-working state. Under the action of external force, the punch rod 1 continues to move obliquely downward along the hypotenuse of the wedge strip 22 until the bottom of the punch rod 1 contacts the bottom of the oil guide cover 04 and stops moving. At this time, the disassembly tool 01 is in normal working condition, the effective punch radius 05 reaches the maximum value, and the disassembly tool 01 is completely fixed in the oil guide cover 04. By knocking the umbrella handle 12 at the other end of the punch rod 1, the oil guide cover 04 is directly knocked out of the inner cavity of the input shaft, so that the oil guide cover 04 can be removed without removing the tightening bolts 02.

[0039] It is known from common technical knowledge that the present invention can be implemented by other embodiments that do not deviate from its spirit or essential features. Therefore, the above disclosed embodiments are only illustrative in all respects and are not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are included in the present invention.

Claims

1. A tool for quickly disassembling the oil guide cover in the transmission input shaft subassembly, characterized in that: The disassembly tool (01) comprises a punch rod (1) and a wedge-shaped slide block (2); an inclined slide groove (11) is provided at the lower end of the punch rod (1); and the wedge-shaped slide block (2) is connected to the inclined slide groove (11) via a fixing pin (3); A shaft system (03) is provided above the oil guide cover (04), a tightening bolt (02) is provided on the top of the shaft system (03), and the disassembly tool (01) can pass through the tightening bolt (02) and extend into the shaft system (03); The wedge-shaped slider (2) is movable in the axial direction of the punch rod (1).

2. A tool for quickly disassembling the oil guide cover in the transmission input shaft subassembly according to claim 1, characterized in that: The punch rod (1) is a long cylindrical rod body, the diameter of the punch rod (1) is smaller than the diameter of the center hole of the tightening bolt (02), and the diameter of the center hole of the tightening bolt (02) is equal to the diameter of the center hole of the oil guide cover (04).

3. A tool for quickly disassembling the oil guide cover in the transmission input shaft subassembly according to claim 1, characterized in that: An umbrella handle (12) is provided at the top of the punch rod (1), and a shaft neck (13) is provided at the bottom of the umbrella handle (12).

4. A tool for quickly disassembling the oil guide cover in the transmission input shaft subassembly according to claim 1, characterized in that: The bottom of the punch rod (1) is provided with a flat groove (14) perpendicular to the axial direction of the punch rod (1), an inclined slide groove (11) is provided above the flat groove (14) and along the axial direction of the punch rod (1), and ear-shaped grooves (15) are provided above the flat groove (14) and are symmetrically arranged on both sides of the inclined slide groove (11), and a pin hole (16) is provided in the middle of the ear-shaped groove (15), and the fixing pin (3) is tightly connected in the pin hole (16).

5. A tool for quickly disassembling the oil guide cover in the transmission input shaft subassembly according to claim 4, characterized in that: The lower part of the wedge-shaped slider (2) is provided with a cylindrical base (21), the height of the base (21) is the same as the depth of the flat groove (14), a wedge-shaped strip (22) is provided above the base (21), the hypotenuse angle of the wedge-shaped strip (22) is the same as the angle of the inclined slide groove (11), a waist-shaped groove (23) is provided at a position parallel to the wedge surface of the wedge-shaped strip (22) and offset inwardly toward the body of the wedge-shaped strip (22), the fixing pin (3) passes through the waist-shaped groove (23) and the inclined slide groove (11) to connect the punch rod (1) with the wedge-shaped slider (2), and the wedge-shaped slider (2) can slide along the parallel direction of the waist-shaped groove (23) under the joint constraints of the fixing pin (3) and the inclined slide groove (11).

6. A tool for quickly disassembling the oil guide cover in the transmission input shaft subassembly according to claim 1, characterized in that: The effective punch radius (05) is formed by the cylindrical generatrix of the punch rod (1) and the side generatrix of the wedge-shaped slider (2). The effective punch radius (05) can follow the movement of the wedge-shaped slider (2) in the axial direction of the punch rod (1).

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