A dismounting tool for an automatic transmission oil pump

Abstract

The utility model discloses a kind of dismounting tool for automatic gearbox oil pump, it is related to automobile maintenance tool technical field, at least including drawing sleeve, drawing screw and rotating handle;The drawing sleeve includes a top plate, a fixed half cylinder and a movable half cylinder, the top of the fixed half cylinder is fixed in the bottom of top plate, the top of the movable half cylinder is hinged in the bottom of top plate, the inner wall bottom of the movable half cylinder and fixed half cylinder is equipped with the arc convex edge formed to inwardly extend;The top center of the top plate is equipped with a thread hole matched with drawing screw, the top of drawing screw is equipped with a handle positioning hole, and the rotating handle is arranged in the handle positioning hole.In the utility model, a kind of dismounting tool for automatic gearbox oil pump is proposed, and the structure is simple, and the cost is low.

Description

Technical Field

[0001] This utility model relates to the field of automotive repair tools, and in particular to a disassembly tool for an automatic transmission oil pump. Background Technology

[0002] The automatic transmission oil pump is a crucial component of an automatic transmission, responsible for providing hydraulic power to the transmission. The automatic transmission oil pump is typically tightly mounted within the transmission housing via bolts or interference fits, requiring its removal from the housing during maintenance. Currently, maintenance personnel often use forceful disassembly methods such as pry bars and hammers, which presents the following problems:

[0003] 1. Easily damaged parts: Uneven force applied by the pry bar can easily cause deformation of the oil pump housing, scratches on the sealing surface, and even damage to the mounting surface of the housing;

[0004] 2. Low efficiency: Repeated hammering or prying is laborious and requires multiple people to work together;

[0005] 3. Safety hazard: Tool slippage may cause personal injury.

[0006] Therefore, a special disassembly tooling that is simple in structure, safe to operate, and can apply force evenly is needed. Utility Model Content

[0007] To address the aforementioned problems, this invention proposes a simple and low-cost disassembly fixture for automatic transmission oil pumps. The oil pump is smoothly separated from the transmission housing via a threaded pulling method, thus resolving issues such as inconvenient operation and easy damage to the oil pump and housing in existing technologies.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A disassembly fixture for an automatic transmission oil pump includes at least a pull sleeve, a pull screw, and a rotary handle. The pull sleeve comprises a top plate, a fixed semi-cylinder, and a movable semi-cylinder. The top plate is a circular plate. The top of the fixed semi-cylinder is fixed to the bottom of the top plate, and the top of the movable semi-cylinder is hinged to the bottom of the top plate. The movable semi-cylinder can be flipped outward. When the movable semi-cylinder is flipped inward and abuts against the fixed semi-cylinder, the movable and fixed semi-cylinders form a sleeve. The bottom of the inner walls of both the movable and fixed semi-cylinders are provided with inwardly extending arc-shaped protrusions. A threaded hole matching the pull screw is provided at the center of the top of the top plate. The pull screw passes through the top plate and is screwed and positioned in the threaded hole of the top plate. A handle positioning hole is provided at the top of the pull screw, and the rotary handle passes through the handle positioning hole.

[0010] Preferably, the pulling screw is provided with an anti-detachment sleeve, which is coaxially arranged with the pulling screw. The upper end of the anti-detachment sleeve is fixed to the pulling screw, and the lower end of the anti-detachment sleeve is open. The inner diameter of the anti-detachment sleeve matches the outer diameter of the pulling sleeve. When the anti-detachment sleeve moves down, it can be sleeved on the upper part of the fixed semi-cylinder and the movable semi-cylinder.

[0011] Preferably, the lower end edge of the anti-detachment sleeve is chamfered.

[0012] Preferably, the bottom of the pull screw is provided with an input shaft positioning post.

[0013] Preferably, a strip-shaped observation hole is provided at the joint between the side walls of the fixed semi-cylinder and the movable semi-cylinder.

[0014] The present invention has the following advantages: 1. The disassembly process is smooth and does not easily damage the housing and oil pump; 2. The structure is simple and easy to operate, requiring no other tools; 3. The cost is low and it is easy to promote and use. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is a structural schematic diagram of another state of this utility model.

[0017] Figure 3 This is a cross-sectional view of the present invention.

[0018] Figure 4 This is a cross-sectional view of the present invention during pre-installation.

[0019] Figure 5 This is a cross-sectional view of the present invention in use.

[0020] Figure 6 yes Figure 5 Enlarged view of point a in the middle.

[0021] 1: Pulling sleeve; 101: Top plate; 102: Fixed semi-cylinder; 103: Movable semi-cylinder; 104: Arc-shaped convex edge; 105: Threaded hole; 106: Strip-shaped observation hole; 2: Pulling screw; 201: Input shaft positioning pin; 3: Rotary handle; 4: Anti-disengagement sleeve; 5: Automatic transmission input shaft; 501: Automatic transmission input shaft center hole; 6: Oil pump; 601: Oil pump drive shaft; 602: Oil pump drive shaft external spline; 7: Automatic transmission housing. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0023] A disassembly tool for an automatic transmission oil pump, see [link / reference] Figures 1 to 3 The assembly includes at least a pull sleeve 1, a pull screw 2, and a rotating handle 3. The pull sleeve 1 includes a top plate 101, a fixed semi-cylinder 102, and a movable semi-cylinder 103. The top plate 101 is a circular plate, and the diameter of the top plate 101 is equal to the outer diameter of both the fixed semi-cylinder 102 and the movable semi-cylinder 103. The top of the fixed semi-cylinder 102 is fixed to the bottom of the top plate 101, and the central axis of the fixed semi-cylinder 102 coincides with the central axis of the top plate 101. The top of the movable semi-cylinder 103 is hinged to the bottom of the top plate 101. The movable semi-cylinder 103 can be flipped outwards. When the movable semi-cylinder 103 is flipped inwards to abut against the fixed semi-cylinder 102, the movable semi-cylinder 103 and the fixed semi-cylinder 102 form a sleeve. The bottom of the inner wall of both the movable semi-cylinder 103 and the fixed semi-cylinder 102 is provided with an inwardly extending arc-shaped protrusion 104. The side wall joint of the fixed semi-cylinder 102 and the movable semi-cylinder 103 is provided with a strip-shaped observation hole 106. The top center of the top plate 101 is provided with a threaded hole 105 that matches the pulling screw 2. The pulling screw 2 passes through the top plate 101 and is screwed and positioned on the threaded hole 105 of the top plate 101. The bottom of the pulling screw 2 is provided with an input shaft positioning post 201, and the top of the pulling screw 2 is provided with a handle positioning hole. The rotating handle 3 passes through the handle positioning hole.

[0024] The pulling screw 2 is provided with an anti-detachment sleeve 4, which is coaxially arranged with the pulling screw 2. The upper end of the anti-detachment sleeve 4 is fixed to the pulling screw 2, and the lower end of the anti-detachment sleeve 4 is open. The lower port edge of the anti-detachment sleeve 4 is chamfered. The inner diameter of the anti-detachment sleeve 4 matches the outer diameter of the pulling sleeve 1. When the anti-detachment sleeve 4 moves down, it can be sleeved on the upper part of the fixed semi-cylinder 102 and the movable semi-cylinder 103.

[0025] When disassembling the automatic transmission oil pump 6, first screw the lower end of the pull screw 2 into the threaded hole 105 at the top of the pull sleeve 1. Do not screw too tightly; just enough to prevent the pull screw 2 from falling off. Then, flip the movable semi-cylinder 103 of the pull sleeve 1 outwards, moving the opening side of the fixed semi-cylinder 102 towards the side of the oil pump drive shaft 601. When the fixed semi-cylinder 102 abuts against the oil pump drive shaft 601, flip the movable semi-cylinder 103 back, so that the fixed semi-cylinder 102 and the movable semi-cylinder 103 cover the upper end of the oil pump drive shaft 601, and the arc-shaped protrusion 104 of the movable semi-cylinder 103 and the fixed semi-cylinder 102 is located below the external spline 602 of the oil pump drive shaft at the upper end of the oil pump drive shaft 601. Figure 4 As shown.

[0026] Then, by rotating the handle 3, the pulling screw 2 is rotated, causing the pulling screw 2 to rotate downward relative to the pulling sleeve 1. The anti-disengagement sleeve 4 also rotates downward along with the pulling screw 2. The input shaft positioning post 201 at the lower end of the pulling screw 2 slowly approaches the upper end of the automatic transmission input shaft 5, and finally abuts and engages with the upper opening of the automatic transmission input shaft center hole 501 of the automatic transmission input shaft 5. Continuing to rotate the handle 3, the pulling sleeve 1 will be pulled up until the arc-shaped protrusion 104 of the movable semi-cylinder 103 and the fixed semi-cylinder 102 abuts against the lower side of the external spline 602 of the oil pump drive shaft at the upper end of the oil pump drive shaft 601. At this point, the entire fixture is fixed to the automatic transmission input shaft 5 and the oil pump drive shaft 601, that is, the entire fixture is fixed to the oil pump 6. Furthermore, when the anti-detachment sleeve 4 moves downward, its lower opening will fit over the top plate 101 and the upper parts of the fixed semi-cylinder 102 and the movable semi-cylinder 103, thereby restricting the movable semi-cylinder 103 from turning outward and locking the fixed semi-cylinder 102 and the movable semi-cylinder 103. This effectively prevents the tooling from slipping off from the oil pump 6 during the extraction process. Figure 5 , Figure 6 As shown.

[0027] Finally, the operator only needs to lift the fixture manually or by using a lifting device. The oil pump 6 will be smoothly separated from the automatic transmission housing 7 under axial tension. During this process, it is not easy to damage the oil pump 6 and the automatic transmission housing 7.

Claims

1. A disassembly fixture for an automatic transmission oil pump, characterized in that: It includes at least a pull sleeve (1), a pull screw (2), and a rotating handle (3); the pull sleeve (1) includes a top plate (101), a fixed semi-cylinder (102), and a movable semi-cylinder (103). The top plate (101) is a circular plate. The top of the fixed semi-cylinder (102) is fixed to the bottom of the top plate (101). The top of the movable semi-cylinder (103) is hinged to the bottom of the top plate (101). The movable semi-cylinder (103) can be flipped outward. When the movable semi-cylinder (103) is flipped inward and abuts against the fixed semi-cylinder (102), the movable semi-cylinder (103) can rotate outward. The movable semi-cylinder (103) and the fixed semi-cylinder (102) form a set of cylinders; the bottom of the inner wall of both the movable semi-cylinder (103) and the fixed semi-cylinder (102) is provided with an arc-shaped protrusion (104) extending inward; the top center of the top plate (101) is provided with a threaded hole (105) that matches the pulling screw (2), the pulling screw (2) passes through the top plate (101) and is screwed and positioned on the threaded hole (105) of the top plate (101), the top of the pulling screw (2) is provided with a handle positioning hole, and the rotating handle (3) passes through the handle positioning hole.

2. The disassembly fixture for an automatic transmission oil pump according to claim 1, characterized in that: The pulling screw (2) is provided with an anti-detachment sleeve (4). The anti-detachment sleeve (4) is coaxially arranged with the pulling screw (2). The upper end of the anti-detachment sleeve (4) is fixed with the pulling screw (2). The lower end of the anti-detachment sleeve (4) is open. The inner diameter of the anti-detachment sleeve (4) matches the outer diameter of the pulling sleeve (1). When the anti-detachment sleeve (4) moves down, it can be sleeved on the upper part of the fixed semi-cylinder (102) and the movable semi-cylinder (103).

3. The disassembly fixture for an automatic transmission oil pump according to claim 2, characterized in that: The lower port edge of the anti-detachment sleeve (4) is chamfered.

4. A disassembly fixture for an automatic transmission oil pump according to claim 1, 2, or 3, characterized in that: The bottom of the pull screw (2) is provided with an input shaft positioning post (201).

5. The disassembly fixture for an automatic transmission oil pump according to claim 1, characterized in that: A strip-shaped observation hole (106) is provided at the joint of the side walls of the fixed semi-cylinder (102) and the movable semi-cylinder (103).

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