Gear lifting assembly tool

Abstract

The utility model relates to a gear lifting assembly tool. Comprising a fixing plate and two parallel lifting rods, and strip-shaped holes penetrating through the two ends of the fixing plate are formed in the fixing plate. The two lifting rods each comprise an adjusting part and an extending part, and hooks are arranged at the tail ends, away from the direction of the adjusting parts, of the two extending parts. The extending parts of the two lifting rods penetrate through the strip-shaped holes and extend into the target gear, and the distance between the two lifting rods is adjusted through distance screws arranged on the lifting rods, so that the hook is in contact with a step on the inner wall of the target gear. The length of the two ends, opposite to the short edge of the strip-shaped hole, in the cross section of the adjusting part is larger than that of the short edge of the strip-shaped hole, the adjusting part is propped against the edge of the strip-shaped hole, the lifting screw is rotated to enable the fixing plate to move in the direction away from the target gear, and then the adjusting part is pulled up and drives the hook to pull up the target gear.

Description

TECHNICAL FIELD

[0001] The present application pertains to the technical field of gear pulling technology, and particularly relates to a gear pulling assembly tool. BACKGROUND

[0002] In the assembly process of an aero-engine speed reducer, the installation of the upper and lower casings is an important process. When installing, the upper casing is hoisted and installed on the lower casing. Since there are multiple gears inside the casing, the installation process involves the meshing of multiple gears and the cooperation of bearings, so the installation process takes a long time, and the gears need to be rotated during the installation process. Some of the gears are limited by the cooperation relationship and installation position, and need to be fixed in the bearing mounting hole of the upper casing of the speed reducer from bottom to top, but the cooperation between the gear and the bearing mounting hole is a small gap cooperation, and the gear is easy to slide out of the bearing seat. Once it slides out, it will seriously affect the assembly, so how to stably fix the gear in the bearing seat during the installation process is a problem that must be solved.

[0003] Due to the overall structure and installation method of the speed reducer, it is not possible to arrange a tool below the gear to fix it. The existing tool is an iron rod with a hook (hereinafter referred to as a pulling hook) at one end, which passes through the bearing mounting hole of the upper casing, extends into the gear shaft inner cavity from top to bottom, hooks the step on the inner wall of the gear, and the iron rod of the pulling hook is clamped at the edge of the gear inner hole, forming a lever structure. Then press the top end of the pulling hook with force, generate a reverse force through the lever, fix the gear in the bearing seat, but the existing method has the following defects:

[0004] 1. The operator needs to continuously press the pulling hook with force for a long time during the installation process of the upper and lower casings, but it is easy to lose strength during the long time of pressing, which causes the pulling hook to come off the inner wall of the gear.

[0005] 2. The pulling hook and the gear inner wall step are in unilateral contact, and if the gear is rotated during the installation process, the pulling hook will also rotate with the gear, which may cause the hook of the pulling hook to change direction, causing the pulling hook to come off the inner wall of the gear. CONTENT OF THE INVENTION

[0006] To solve the problems raised in the background art, the purpose of the present application is to provide a gear pulling assembly tool, which comprises a fixed plate and two parallel pulling rods. The fixed plate is provided with a strip-shaped hole penetrating through both ends of the fixed plate. The two pulling rods each comprise an adjusting portion and an extending portion. The two extending portions each pass through the strip-shaped hole along the penetrating direction parallel to the strip-shaped hole, and the distal ends of the two extending portions are each provided with a hook, and the two hooks each protrude from the outer surface of the extending portion in opposite directions. The length of the two ends of the adjusting portion relative to the short side of the strip-shaped hole is greater than the length of the short side of the strip-shaped hole.

[0007] Preferably, the fixing plate is provided with a limiting groove facing the adjusting part around the strip-shaped hole, and the length of the limiting groove relative to the two ends of the short side of the strip-shaped hole is greater than the length of the adjusting part relative to the two ends of the short side of the strip-shaped hole.

[0008] Preferably, one of the two pull rods is provided with a spacing threaded hole, the extension direction of the spacing threaded hole is perpendicular to the penetrating direction of the strip-shaped hole, the spacing threaded hole is connected with a spacing screw, and the end of the spacing screw abuts against the other pull rod.

[0009] Preferably, the fixing plate is provided with a lifting threaded hole penetrating through the two ends of the fixing plate, the penetrating direction of the lifting threaded hole is parallel to the penetrating direction of the strip-shaped hole, the lifting threaded hole is connected with a lifting screw, and the extension direction of the screw rod end of the lifting screw is the same as the extension direction of the extending part.

[0010] Preferably, the lifting threaded hole and the lifting screw are at least four, and the four lifting threaded holes are symmetrically distributed on the two sides of the strip-shaped hole along the length direction.

[0011] Preferably, the hook is semicircular in the shape of the cross section angle of the extending part.

[0012] Preferably, the cross section of the adjusting part is square.

[0013] In summary, the present application has the following beneficial technical effects:

[0014] 1. Instead of relying on manpower, the two pull rods are moved in opposite directions along the strip-shaped hole by adjusting the spacing screw, so that the hook contacts the stepped surface in the gear and is fixed. Then the fixing plate is lifted as a whole by adjusting the lifting screw, and the adjusting part of the pull rod is lifted through the strip-shaped hole, the extending part is pulled, and then the gear is pulled through the hook, so that the fixing effect of the gear can be kept stable for a long time, and the pulling force on the gear is enhanced.

[0015] 2. The hooks of the two pull rods are in contact with the two sides of the stepped surface in the gear, the contact area is large, and the gear remains stable and balanced when rotating, and will not be pulled out. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a perspective view of the present application in combination with the use state of a workpiece;

[0017] Figure 2 is a sectional view of the present application in combination with the use state of a workpiece;

[0018] Figure 3 is a sectional view of the present application;

[0019] Figure 4 is a top view of the present application.

[0020] Reference signs:

[0021] 1, fixed plate; 101, strip-shaped hole; 102, limiting groove; 2, pull rod; 201, adjusting part; 202, extension part; 203, hook; 3, spacing screw; 4, lifting screw; 5, workpiece; 6, gear. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0023] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application. Figures 1-4 The present application will be described in further detail. The embodiments of the present application disclose a gear pull assembly tool. It comprises a fixed plate 1 and two parallel pull rods 2. The fixed plate 1 is provided with strip-shaped holes 101 penetrating through both ends of the fixed plate 1, and the two pull rods 2 each comprise an adjusting part 201 and an extension part 202. The two extension parts 202 each pass through the strip-shaped hole 101 in a direction parallel to the penetration direction of the strip-shaped hole 101, and the distal end of each extension part 202 away from the adjusting part 201 is provided with a hook 203. The two hooks 203 each protrude from the outer surface of the extension part 202 in opposite directions, and the hook 203 is used to contact the stepped surface of the inner wall of the gear 6. The hook 203 can be integrally formed with the extension part 202 or fixedly connected to the extension part 202 by conventional connection technology. The length of the two ends of the adjusting part 201 relative to the short side of the strip-shaped hole 101 in the cross section is greater than the length of the short side of the strip-shaped hole 101, so that the adjusting part 201 cannot pass through the strip-shaped hole 101, and the fixed plate 1 has a limiting function on the adjusting part 201. By moving the fixed plate 1 in the direction of the adjusting part 201, the pull rod 2 is driven to move in the direction of the adjusting part 201, and the hook 203 of the pull rod 2 has a pulling force. At the same time, the strip-shaped hole 101 is used to move the two pull rods 2 transversely within the range of the hole of the strip-shaped hole 101, so as to adjust the relative position of the two pull rods 2, and when the two pull rods 2 move in opposite directions, the hook 203 can hook the stepped surface of the inner wall of the target gear 6 to fix the target gear 6.

[0024] Further, the fixing plate 1 is provided with a limiting groove 102 around the strip-shaped hole 101, which is towards the adjusting part 201. The length of the limiting groove 102 relative to the two ends of the short side of the strip-shaped hole 101 is greater than the length of the adjusting part 201 relative to the two ends of the short side of the strip-shaped hole 101. A part of the adjusting part 201 can be accommodated in the limiting groove 102, and the edge of the limiting groove 102 limits the movement of the adjusting part 201 in the transverse direction, which can prevent the excessive transverse movement of the adjusting part 201 from exceeding the length of the hole of the strip-shaped hole 101.

[0025] Further, the distance between the two pull rods 2 can be adjusted by manually operating the adjusting part 201, or by connecting the adjusting part 201 with external equipment. In this embodiment, a mechanism for adjusting the distance between the two pull rods 2 is also provided. One of the two pull rods 2 is provided with a distance threaded hole, the extension direction of which is perpendicular to the penetration direction of the strip-shaped hole 101. The distance threaded hole is connected with a distance screw 3, the end of which abuts against the other pull rod 2. By rotating the distance screw 3, a pushing force is generated at the end of the distance screw 3, which pushes the other pull rod 2 to move, so that the two pull rods 2 move in opposite directions, thereby adjusting the distance between the two pull rods 2. When the rotation of the distance screw 3 is stopped, the distance between the two pull rods 2 can be fixed at a set distance. The number of distance screws 3 and distance threaded holes can be set according to actual needs.

[0026] Further, the lifting of the fixing plate 1 can be manually operated, or the movement of the fixing plate 1 can be assisted by external equipment. In this embodiment, a mechanism for adjusting the movement of the fixing plate 1 is provided. The fixing plate 1 is provided with a lifting threaded hole penetrating through both ends of the fixing plate 1, the penetration direction of which is parallel to the penetration direction of the strip-shaped hole 101. The lifting threaded hole is connected with a lifting screw 4, the extension direction of the screw rod end of which is the same as the extension direction of the extending part 202. By rotating the lifting screw 4, the end of the lifting screw 4 moves in the extension direction of the extending part 202, and when the end of the lifting screw 4 contacts the outer surface of the cartridge workpiece 5, a counteracting force is provided for the fixing plate 1, which moves the fixing plate 1 away from the target workpiece 5, thereby pulling the hook 203 of the pull rod 2 to move the gear 6 in the direction of the adjusting part 201 of the pull rod 2. There are at least four lifting threaded holes and lifting screws 4, which are symmetrically distributed on both sides of the strip-shaped hole 101 along the length direction, which can improve the balance and stability of the pulling force.

[0027] Further, the hook 203 has a semicircular shape in the cross-sectional angle of the extending part 202, which can increase the contact area with the inner wall step of the gear 6, prevent the gear 6 from rotating and falling off during the work process, and significantly improve the stability.

[0028] Further, the cross-sectional shape of the junction between the adjusting portion 201 and the extending portion 202 is square. The long side of the cross section of the adjusting portion 201 is arranged in parallel with the short side of the strip-shaped hole 101, so that the contact area between the fixing plate 1 and the adjusting portion 201 is certain, which helps to reduce the pressure and facilitate the movement of the fixing plate 1 and the adjusting portion 201, and the two ends of the long side of the cross section of the adjusting portion 201 are uniformly stressed. In this embodiment, the adjusting portion 201 is a square boss.

[0029] Working principle: Place the fixing plate 1 on the outer surface of the target workpiece 5, such as the outer surface of the case, extend the extending portion 202 into the inner wall of the gear 6 in the workpiece 5, rotate the spacing screw to displace the two parallel pull rods 2 in opposite directions until the hook 203 contacts the step of the inner wall of the gear 6. Rotate the lifting screw to move the fixing plate 1 away from the gear 6, and then drive the pull rod 2 to move away from the gear 6, and then make the hook 203 hook out of the step of the inner wall of the gear 6 to realize the pulling effect in the direction of the adjusting portion 201.

[0030] The pulling effect of the present scheme can realize the pulling effect from bottom to top in the existing conventional workflow, and can also realize the pulling effect of the internal gear 6 of the workpiece 5 to the outside at any angle.

[0031] The device embodiments described above are only schematic, and the units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, which can be located in one place or distributed on multiple network units. Part or all of the modules can be selected according to actual needs to achieve the purpose of the present embodiment scheme.

[0032] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "setting", "connecting", "fixing", "screwed", and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited, the above-mentioned terms in the present application can be understood according to the specific meaning of the above-mentioned terms in the present application by the person skilled in the art.

[0033] It can be understood that for those skilled in the art, the technical scheme of the present application and the concept of the present application can be replaced or changed equivalently, and all these changes or replacements shall belong to the protection scope of the claims attached to the present application.

Claims

1. A gear pull-up assembly tool characterized by, The utility model provides a kind of lifting device, including fixed plate (1) and two parallelly arranged pull rods (2), the fixed plate (1) is provided with strip hole (101) passing through both ends of fixed plate (1), two the pull rod (2) includes adjustment part (201) and extension part (202), two the extension part (202) is passed through the strip hole (101) along the direction of penetration of the strip hole (101) parallelly, the end of two the extension part (202) away from the adjustment part (201) direction is equipped with hook (203), two the hook (203) mutually in opposite directions is projected on the outer surface of the extension part (202), the cross section of the adjustment part (201) relative to the length of both ends of the short side of the strip hole (101) is greater than the length of the short side of the strip hole (101).

2. The gear puller assembly tool of claim 1, wherein, The fixed plate (1) is provided with limiting groove (102) around the strip hole (101) towards the adjustment part (201), the length of both ends of the limiting groove (102) relative to the short side of the strip hole (101) is greater than the length of both ends of the cross section of the adjustment part (201) relative to the short side of the strip hole (101).

3. The gear puller assembly tool of claim 1, wherein, One of two the pull rod (2) is provided with interval threaded hole, the extension direction of the interval threaded hole is perpendicular to the direction of penetration of the strip hole (101), interval threaded hole is connected with interval screw (3), the end of interval screw (3) is resisted against another pull rod (2).

4. The gear puller assembly tool of claim 1, wherein, The fixed plate (1) is provided with lifting threaded hole passing through both ends of fixed plate (1), the direction of penetration of the lifting threaded hole is parallel to the direction of penetration of the strip hole (101), lifting threaded hole is connected with lifting screw (4), the extension direction of screw end of lifting screw (4) is identical with the extension direction of the extension part (202).

5. The gear puller assembly tool of claim 4, wherein, The lifting threaded hole and the lifting screw (4) are at least four, four the lifting threaded hole is symmetrically distributed on both sides of the strip hole (101) along length direction.

6. The gear puller assembly tool of claim 1, wherein, The hook (203) is semicircular in the shape of cross section angle of the extension part (202).

7. The gear puller assembly tool of claim 1, wherein, The cross section shape of the junction of the adjustment part (201) and extension part (202) is square.

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