A small-clearance gear puller

Abstract

The utility model discloses a small gap gear puller belongs to the technical field of dismounting tool, this small gap gear puller, including the draw sleeve, the draw sleeve outside all is established with a plurality of adjusting hole, the draw sleeve upper end is installed with bolt, a plurality of adjusting hole in -side all slidingly connected with the draw plate, a plurality of draw plate top between the installation has the anti -loose component, the anti -loose component can prevent draw plate and occur loose in the use process, the utility model discloses a draw plate can even convert the axial pullout force of device into radial clamping force, avoid the gear inclination of traditional tool because single -point stress leads to, and can also guarantee the coaxial degree of gear and axle, prevent the jam or mating surface scratch of the stress excursion, through setting up the anti -loose component, can through mechanical resistance limit or directional constraint, limit bolt and draw plate, even if the operation appears the jitter, bolt loosening, draw plate excursion can also be avoided, ensure that the pullout force even transmission along the preset path.

Description

Technical Field

[0001] This utility model relates to the field of disassembly tool technology, and in particular to a small-clearance gear extraction device. Background Technology

[0002] In the field of mechanical manufacturing and maintenance, disassembling small-clearance gears is a key challenge. Traditional methods have significant limitations. The thermal method, which disassembles the gear by heating it, can easily lead to material annealing, tooth surface oxidation, and journal deformation, damaging the precision of the parts. Mechanical hard disassembly, which uses pry bars and hammers to strike the gear, often causes scratches on the tooth surface, journal wear, and may even cause the parts to break. Conventional pullers have dispersed clamping force and poor adaptability, making it impossible to penetrate into narrow gaps and prone to slippage and failure.

[0003] In the operation of existing gear extraction devices, once vibration occurs, the device's own components are prone to loosening. Loose components will disrupt the original force transmission path, causing the extraction force to be unevenly applied to the gear and instead concentrated on local components. Furthermore, loose bolts may cause axial force to suddenly concentrate on a certain pull claw, which may not only cause the pull claw to deform or break due to stress overload, but may also cause local pressure deformation of the gear due to uneven force, further increasing the difficulty of subsequent disassembly.

[0004] Therefore, there is an urgent need to provide a small-clearance gear extraction device to solve the above problems. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a small-clearance gear extraction device.

[0006] To solve the above-mentioned technical problems, the present invention provides a small-clearance gear extraction device, including a pull sleeve, wherein multiple adjustment holes are provided on the outer side of the pull sleeve;

[0007] The upper end of the sleeve is equipped with a bolt, and pull plates are slidably connected to the inner sides of the multiple adjustment holes;

[0008] An anti-loosening component is installed between the tops of the plurality of pull plates, which can prevent the pull plates from becoming loose during use.

[0009] The present invention is further configured such that: the plurality of adjustment holes fit into the corresponding pull plates, and each pair of pull plates is set at a 120° angle.

[0010] The above technical solution enables the clamping force of each pull plate on the gear to be evenly transmitted along the circumference. This uniform force can prevent the gear from tilting and jamming due to uneven force, ensure the coaxiality of the gear and shaft, and prevent the mating surfaces of the gear or shaft from being damaged by tilting and scraping.

[0011] The present invention is further configured such that: a threaded hole is provided at the upper end of the pull sleeve, the bolt matches the threaded hole, and the height of the bolt is greater than the height of the pull sleeve.

[0012] Through the above technical solution, the threaded hole and the bolt are precisely matched to form a reliable threaded pair, which can smoothly convert the rotational motion into axial linear motion, making the force transmission more controllable and providing a stable power source for gear extraction.

[0013] The present invention is further configured such that: each of the plurality of pull plates has an arc-shaped groove at its upper end, and the arc-shaped groove matches the outer wall of the gear.

[0014] Through the above technical solution, the arc groove and the curved surface of the gear outer wall are precisely fitted, which greatly increases the contact area between the pull plate and the gear. When clamping or pulling out the gear, the force can be transmitted to the gear more evenly through the arc surface, avoiding local pressure concentration and preventing the gear from deforming due to excessive local force.

[0015] The present invention is further configured such that: the anti-loosening component includes a connecting plate fixedly connected to the upper end of multiple pull plates, a connecting member is threadedly connected to the outer surface of the bolt, a fixing plate is fixedly connected to the upper outer end of each of the multiple connecting plates, a threaded rod is threadedly connected to each of the fixing plates, and a handle is fixedly connected to the top of each of the multiple threaded rods.

[0016] The above technical solution involves aligning the device with the gear to be pulled out, adjusting the position of the pull plate to ensure precise alignment between the clamping part of the pull plate and the outer wall of the gear, and simultaneously making the connecting parts and bolts initially threaded together to align the positions of the connecting plate and the fixing plate. Then, multiple handles are rotated to drive multiple threaded rods to rotate until the bottoms of the multiple threaded rods abut against the connecting parts, thereby achieving the purpose of preventing loosening.

[0017] The present invention is further configured such that: each of the multiple connecting plates is provided with a sliding groove, and the connecting member matches the multiple sliding grooves.

[0018] Through the above technical solution, the slide provides a directional sliding track for the connector, which can limit the movement direction of the connector, prevent its deviation and shaking, and ensure that the movement of the connector, bolt and pull plate is synchronous and precise, providing a guiding basis for the stable operation of the anti-loosening component.

[0019] The present invention is further configured such that the height of each of the multiple threaded rods is greater than the distance between the fixing plate and the connecting member.

[0020] With the above technical solution, the threaded rod needs to be rotated downwards to tighten the connecting piece in order to limit the loosening of the bolt. If the height of the threaded rod is sufficient, it can provide enough axial feed space to ensure that the bottom of the threaded rod can smoothly press against the connecting piece during rotation, thereby achieving reliable anti-loosening locking.

[0021] The beneficial effects of this utility model are as follows:

[0022] 1. By setting a pull plate, this utility model can evenly convert the axial pull-out force of the device into radial clamping force, avoiding gear tilting caused by single-point force in traditional tools, and also ensuring the coaxiality of the gear and shaft, preventing jamming or scratching of the mating surface caused by force offset.

[0023] 2. By setting anti-loosening components, this utility model can limit the bolts and pull plates through mechanical resistance or directional constraints. Even if vibration occurs during operation, it can prevent the bolts from loosening and the pull plates from shifting, ensuring that the pulling force is evenly transmitted along the preset path. Attached Figure Description

[0024] Figure 1 This is an appearance drawing of the present utility model;

[0025] Figure 2 This is the front view of the present invention;

[0026] Figure 3 This is a longitudinal sectional view of the present invention;

[0027] Figure 4 for Figure 1 A magnified view of a portion of point A in the middle.

[0028] In the diagram: 1. Pull sleeve; 2. Adjustment hole; 3. Bolt; 4. Pull plate; 5. Anti-loosening component; 501. Connecting plate; 502. Connector; 503. Fixing plate; 504. Threaded rod; 505. Handle. Detailed Implementation

[0029] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0030] Please see Figure 1 - Figure 4A small-clearance gear extraction device includes a pull sleeve 1. Multiple adjustment holes 2 are provided on the outer side of the pull sleeve 1, and these holes 2 engage with corresponding pull plates 4. Each pair of pull plates 4 is positioned at a 120° angle. This allows the clamping force of each pull plate 4 on the gear to be evenly transmitted along the circumference. This uniform force distribution prevents the gear from tilting and jamming due to uneven force distribution, ensuring the coaxiality of the gear and shaft, and preventing damage to the mating surfaces of the gear or shaft due to tilting and scraping. A bolt 3 is installed on the upper end of the pull sleeve 1, and a threaded hole is provided on the upper end of the pull sleeve 1. The bolt 3 matches the threaded hole, and the height of the bolt 3 is greater than that of the pull sleeve 1. Height; The threaded hole and bolt 3 are precisely matched to form a reliable threaded pair, which can smoothly convert the rotational motion into axial linear motion, making the force transmission more controllable and providing a stable power source for gear extraction. Pull plates 4 are slidably connected to the inner side of multiple adjustment holes 2. The upper end of multiple pull plates 4 is provided with arc-shaped grooves, and the arc-shaped grooves match the outer wall of the gear. The arc-shaped grooves and the curved surface of the outer wall of the gear are precisely fitted, which greatly increases the contact area between the pull plate 4 and the gear. When clamping or pulling out the gear, the force can be transmitted to the gear more evenly through the arc surface, avoiding local pressure concentration and preventing the gear from deforming due to excessive local force.

[0031] like Figure 2 , Figure 3 and Figure 4As shown, an anti-loosening component 5 is installed between the tops of multiple pull plates 4. The anti-loosening component 5 includes a connecting plate 501 fixedly connected to the upper end of the multiple pull plates 4, a connecting piece 502 threadedly connected to the outer surface of the bolt 3, and a fixing plate 503 fixedly connected to the upper outer side of each of the multiple connecting plates 501. Threaded rods 504 are threadedly connected to each fixing plate 503, and handles 505 are fixedly connected to the top of each of the multiple threaded rods 504. The device is aligned with the gear to be pulled out, and the position of the pull plates 4 is adjusted so that the clamping part of the pull plates 4 is precisely aligned with the outer wall of the gear. At the same time, the connecting piece 502 and the bolt 3 are initially threadedly engaged, so that the positions of the connecting plate 501 and the fixing plate 503 correspond. Then, the multiple handles 505 are rotated, causing the handles 505 to drive the multiple threaded rods 504 to rotate until the bottom of the multiple threaded rods 504 abuts against the connecting piece 502, thereby achieving... The purpose of the anti-loosening component 5 is to prevent the pull plate 4 from loosening during use. Multiple connecting plates 501 are provided with sliding grooves, and the connector 502 matches the multiple sliding grooves. The sliding grooves provide a directional sliding track for the connector 502, which can limit the movement direction of the connector 502, prevent its deviation and shaking, and ensure that the movement of the connector 502, bolt 3 and pull plate 4 is synchronous and accurate, providing a guiding foundation for the stable operation of the anti-loosening component 5. The height of multiple threaded rods 504 is greater than the distance between the fixed plate 503 and the connector 502. The threaded rods 504 need to be rotated downward to tighten the connector 502 to limit the loosening of the bolt 3. If the height of the threaded rods 504 is sufficient, it can provide enough axial feed space to ensure that the bottom of the threaded rods 504 can smoothly press against the connector 502 during rotation, so as to achieve reliable anti-loosening locking.

[0032] In use, the device is aligned with the gear to be pulled out, and the position of the pull plate 4 is adjusted so that the clamping part of the pull plate 4 is precisely aligned with the outer wall of the gear. At the same time, the connecting piece 502 and the bolt 3 are initially threaded together, so that the connecting plate 501 and the fixing plate 503 are aligned. Then, the multiple handles 505 are rotated so that the handles 505 drive the multiple threaded rods 504 to rotate until the bottom of the multiple threaded rods 504 abuts against the connecting piece 502, thereby achieving the purpose of preventing loosening. Finally, the bolt 3 is rotated until the gear is disengaged.

[0033] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A small-clearance gear extraction device, comprising a pull sleeve (1), characterized in that: Multiple adjustment holes (2) are provided on the outer side of the sleeve (1); Bolts (3) are installed on the upper end of the sleeve (1), and pull plates (4) are slidably connected to the inner side of the multiple adjustment holes (2); An anti-loosening component (5) is installed between the tops of the plurality of pull plates (4), the anti-loosening component (5) being able to prevent the pull plates (4) from loosening during use.

2. The small-backlash gear extraction device according to claim 1, characterized in that: The plurality of adjustment holes (2) are fitted with corresponding pull plates (4), and each pair of pull plates (4) are set at a 120° angle.

3. The small-backlash gear extraction device according to claim 1, characterized in that: The upper end of the pull sleeve (1) is provided with a threaded hole, the bolt (3) matches the threaded hole, and the height of the bolt (3) is greater than the height of the pull sleeve (1).

4. The small-clearance gear extraction device according to claim 1, characterized in that: Each of the pull plates (4) has an arc-shaped groove at its upper end, and the arc-shaped groove matches the outer wall of the gear.

5. A small-backlash gear extraction device according to claim 1, characterized in that: The anti-loosening component (5) includes a connecting plate (501) fixedly connected to the upper end of multiple pull plates (4), a connecting piece (502) threadedly connected to the outer surface of the bolt (3), a fixing plate (503) fixedly connected to the upper outer side of each of the multiple connecting plates (501), a threaded rod (504) threadedly connected to each of the fixing plates (503), and a handle (505) fixedly connected to the top of each of the multiple threaded rods (504).

6. A small-backlash gear extraction device according to claim 5, characterized in that: Each of the connecting plates (501) has a sliding groove, and the connecting member (502) matches the multiple sliding grooves.

7. A small-backlash gear extraction device according to claim 5, characterized in that: The height of each of the threaded rods (504) is greater than the distance between the fixing plate (503) and the connector (502).

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