Special device for replacing gear shaft pin
By designing a special device for gear shaft pin replacement, the problems of complex operation, difficult to guarantee accuracy, poor equipment adaptability and long maintenance cycle during gear shaft pin replacement are solved, and the rapid and accurate replacement of gear shaft pins is achieved, reducing costs and improving equipment performance.
Patent Information
- Application Number
- CN202421943712.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-12
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-08-12
AI Technical Summary
In the prior art, the gear shaft pin replacement process is complicated, the accuracy is difficult to guarantee, the equipment adaptability is poor and the maintenance cycle is long, resulting in high replacement cost and degradation of equipment performance.
A special device including a fixed pedestal, a double-layer platform, a centering hole, a screw hole, a pin removal device and a gear positioning sleeve is designed. Through a U-shaped fixed pedestal and a double-layer operating platform, the gear shaft pin can be quickly and accurately replaced.
It improves the efficiency and accuracy of gear shaft pin replacement, reduces operational difficulty and maintenance costs, broadens the scope of application of the device, extends service life, and simplifies the maintenance process.
Smart Images
Figure CN223013065U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of mechanical equipment maintenance, in particular to a special device for replacing gear shaft pins. Background Art
[0002] In the field of mechanical manufacturing, especially in the design of precision transmission systems, gear shaft pins, as key components for connecting and transmitting power, directly affect the stability and efficiency of the entire transmission system. With the continuous progress of industrial technology, the requirements for the precision, durability, and replacement convenience of gear shaft pins are also increasing day by day.
[0003] Currently, when installing a new gear or removing an old gear, the shaft pin is mainly driven in or knocked out bit by bit with a milling machine and a hammer. During the disassembly and installation process, the huge impact force of the hammer may cause the rotating shaft to bend, thereby damaging the sealing surface of the rotating shaft and resulting in hydraulic oil leakage. It is difficult to ensure the positioning accuracy of the gear shaft pin, which in turn affects the overall performance of the transmission system; at the same time, the disassembly and assembly efficiency is low, affecting the maintenance efficiency and quality.
[0004] In the market, there have also emerged some gear shaft pin replacement technologies, mainly methods for disassembling and installing gear shaft pins using specific tools and equipment. These methods have improved the replacement efficiency to a certain extent, but still have the following main problems:
[0005] (1) High operation complexity: The replacement process in the existing technology often involves multiple steps and has high requirements for the skills of operators, increasing the risk of errors;
[0006] (2) Difficulty in ensuring accuracy: During the disassembly and installation process, due to human factors or equipment limitations, it is difficult to ensure the positioning accuracy of the gear shaft pin, which in turn affects the overall performance of the transmission system;
[0007] (3) Poor equipment adaptability: Different models of gear transmission systems often use different specifications of gear shaft pins, and the existing replacement tools often lack good versatility and adaptability, resulting in an increase in replacement costs;
[0008] (4) Long maintenance cycle: Frequent disassembly and installation not only increase the downtime of the equipment but also may cause additional wear to the transmission system, shortening the service life of the equipment.
[0009] In order to solve the above problems, improve the efficiency and accuracy of gear shaft pin replacement, and at the same time reduce the operation difficulty and maintenance cost, the present invention proposes a new gear shaft pin replacement device, aiming to achieve the rapid and accurate replacement of gear shaft pins through innovative structural design and working principles. Summary of the Invention
[0010] The technical problem to be solved by the present utility model is to provide a special device for replacing gear shaft pins, so as to solve the problems that there is no special gear shaft pin replacement tool in actual production, and the newly developed specific tools and equipment on the market have high operation difficulty, poor applicability and high maintenance cost.
[0011] To solve the above technical problems, the technical solution adopted by the present utility model is: a special device for replacing gear shaft pins, including a fixed bench. A double-layer platform is arranged on the fixed bench. A centering hole is arranged at the center of the lower platform, and a screw hole is arranged at the center of the upper platform. A pin-taking device is installed in the screw hole. The centering hole of the lower platform is concentric with the screw hole of the upper platform and is perpendicular to the gear mounting surface on the lower platform. A gear positioning sleeve is installed in the centering hole to position the gear.
[0012] In a preferred solution, the fixed bench is arranged in a U shape. A connecting plate is arranged on one side between the lower platform and the upper platform to connect and fix the lower platform and the upper platform into one body.
[0013] In a preferred solution, the pin-taking device includes a pin-taking shaft, and the pin-taking shaft is arranged as a screw rod and is screwed and fixed in the screw hole of the upper platform.
[0014] In a preferred solution, the pin-taking device further includes a hand wheel, and the lower part of the hand wheel is detachably fixed to the top of the pin-taking shaft.
[0015] In a preferred solution, a 15°-20° guiding angle is arranged at the front end of the pin-taking shaft.
[0016] In a preferred solution, the centering hole is provided with a gear positioning sleeve. The outer circle of the gear positioning sleeve matches the inner hole of the centering hole, and the inner hole of the gear positioning sleeve adapts to the outer diameter of the gear positioning end face.
[0017] In a preferred solution, the outer circle of the gear positioning sleeve is arranged in a stepped shape, and the lower part is installed in the inner hole of the centering hole, and the step is mounted on the peripheral edge of the centering hole.
[0018] In a preferred solution, a group of support frames are arranged at the bottom of the lower platform, and the support frames are arranged on both sides of the centering hole at the center of the lower platform to lift the lower platform off the ground.
[0019] The special device for replacing gear shaft pins provided by the present utility model has the following beneficial effects:
[0020] 1. The present utility model solves the problems that there is no special gear shaft pin replacement tool in actual production, and the newly developed specific tools and equipment on the market have high operation difficulty, poor applicability and high maintenance cost;
[0021] 2. The setting of the fixed stand of the utility model provides a stable fixed platform for the gear whose shaft pin is to be replaced, making the operation process more convenient and accurate, and realizing the construction of a special operating device;
[0022] 3. The fixed stand of the utility model adopts a U-shaped structural design. This innovation not only provides positioning for the gears, but also cleverly constructs a double-layer operating platform. The upper platform is used to position the gears, while the lower platform provides stable support and positioning for the pin removal device that applies downward force, ensuring smooth operation. ;
[0023] 4. The utility model is specially designed with a downward rotating hand wheel in the pin removal device. The operator only needs to simply rotate the hand wheel to transmit the vertical downward force to the pin removal shaft, and then the pin removal shaft directly acts on the gear shaft pin to realize the easy removal of the shaft pin. This design not only improves the efficiency of shaft pin replacement, but also ensures the safety and reliability of the operation process;
[0024] 5. The utility model ingeniously introduces a positioning sleeve design. The stepped structure of the outer circle not only realizes the precise positioning of the gear, but also effectively avoids the stress concentration phenomenon at the centering hole by dispersing the stress. This innovative design significantly broadens the scope of application of the device and effectively extends the service life of the overall device.
[0025] 6. The utility model specially sets a guide angle for the pin removal shaft in the pin removal device. This detail design makes the connection between the pin removal shaft and the gear shaft pin more precise, and ensures the concentrated transmission of the pin removal shaft force, which not only greatly improves the efficiency of shaft pin removal, but also effectively avoids the damage to the gear caused by the dispersion of force, ensuring the safety and efficiency of the operation;
[0026] 7. A group of support frames are carefully arranged at the bottom of the lower platform of the utility model. They not only bear the heavy responsibility of supporting the entire lower platform, but also realize the vacancy and stability of the platform through their precise layout, that is, they are arranged on both sides of the centering hole in the center of the lower platform. This design not only improves the overall stability of the device, but also reserves enough space for subsequent operations, making the entire replacement process smoother and unobstructed. At the same time, the use of the support frame also reduces the direct contact between the platform and the ground or other supporting surfaces, thereby reducing friction and wear, and further extending the service life of the device;
[0027] 8. The utility model has a simple structure, a concise and clear overall design, and the structure of the fixed stand and the pin removal device is intuitive and efficient, without the need for a complicated assembly process, thus reducing production costs;
[0028] 9. The utility model is convenient to operate. Through the U-shaped structure design of the fixed bench, it not only provides accurate positioning for the gear, but also constructs a double-layer operation platform, enabling the operator to easily replace the shaft pin. Especially the handwheel that rotates downward makes the removal of the shaft pin simple and fast, greatly improving the operation efficiency.
[0029] 10. The design of the utility model takes into account the convenience of maintenance. The disassembly and installation of each component are relatively simple, and it is easy to clean and inspect, thereby reducing the maintenance cost and time.
[0030] 11. Through a series of elaborate designs and innovations, the utility model has successfully solved the problem of no special tool for replacing the gear shaft pin in actual production. It not only reduces the operation difficulty, maintenance cost and labor cost, but also significantly improves the work efficiency and product quality. Its simple structure, convenient operation and easy maintenance characteristics bring real convenience and benefits to the majority of users. BRIEF DESCRIPTION OF THE DRAWINGS
[0031] The following further describes the utility model in conjunction with the drawings and embodiments:
[0032] Figure 1 is the overall structural schematic diagram of the utility model;
[0033] Figure 2 is the structural schematic diagram of the side view of the utility model;
[0034] Figure 3 is the assembly schematic diagram of the fixed bench and the support frame of the utility model;
[0035] Figure 4 is the structural schematic diagram of the conical positioning sleeve of the utility model;
[0036] In the figure: the lower platform 1, the centering hole 2, the upper platform 3, the screw hole 4, the connecting plate 5, the pin extracting shaft 6, the handwheel 7, the gear positioning sleeve 8, the support frame 9, the gear 10, the shaft pin 11. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0037] The following further describes the technical solutions in the utility model in conjunction with the drawings and embodiments:
[0038] As Figures 1 to 4 shown, a special device for replacing the gear shaft pin includes a fixed bench. A double-layer platform is arranged on the fixed bench. A centering hole 2 is arranged at the center of the lower platform 1, a screw hole 4 is arranged at the center of the upper platform 3, and a pin extracting device is installed in the screw hole 4. The centering hole 2 of the lower platform 1 is concentric with the screw hole 4 of the upper platform 3 and is perpendicular to the installation surface of the gear 10 on the lower platform 1. A gear positioning sleeve 8 is installed in the centering hole 2 to position the gear 10.
[0039] In this embodiment, the fixed bench is arranged in a U shape, and a connecting plate 5 is arranged on one side between the lower platform 1 and the upper platform 3 to connect and fix the lower platform 1 and the upper platform 3 into an integral body.
[0040] Furthermore, the pin removing device includes a pin removing shaft 6, and the pin removing shaft 6 is arranged as a screw rod and is screwed and fixed in the screw hole 4 of the upper platform 3.
[0041] Furthermore, the pin removing device further includes a hand wheel 7, and the lower part of the hand wheel 7 is detachably fixed to the top of the pin removing shaft 6.
[0042] Furthermore, a guiding angle of 15° - 20° is arranged at the front end of the pin removing shaft 6.
[0043] Furthermore, a gear positioning sleeve 8 is arranged in the centering hole 2. The outer circle of the gear positioning sleeve 8 is matched with the inner hole of the centering hole 2, and the inner hole of the gear positioning sleeve 8 is adapted to the outer diameter of the positioning end face of the gear 10.
[0044] Furthermore, the outer circle of the gear positioning sleeve 8 is arranged in a stepped shape, and the lower part is installed in the inner hole of the centering hole 2, and the step is mounted on the peripheral edge of the centering hole 2.
[0045] Furthermore, a set of support frames 9 are arranged at the bottom of the lower platform 1, and the support frames 9 are arranged on both sides of the centering hole 2 at the center of the lower platform 1 to lift the lower platform 1 off the ground.
[0046] During specific use, after the device is installed, debugged and accepted as qualified, the device is placed and fixed on the operation platform. Then, a suitable positioning sleeve 8 is selected according to the gear 10 of the pin 11 to be replaced, and the gear 10 of the pin 11 to be replaced is installed and fixed on the positioning sleeve 8. After ensuring firm fixation, hold the gear 10 with one hand for a little positioning, and rotate the hand wheel 7 with the other hand to make the pin removing shaft 6 feed downward until it contacts the upper plane of the pin 11, then apply force to the old pin 11 to slowly separate and disengage it from the inner hole of the gear 10, and take out the old pin 11. Rotate the hand wheel 7 in the reverse direction to lift the pin removing shaft 6 upward, install a new pin 11 into the inner hole of the gear 10, hold the new pin 11 by hand, and rotate the hand wheel 7 to make the pin removing shaft 6 feed downward until it contacts the upper plane of the new pin 11, then apply force to the pin 11 to make it slowly enter the inner hole of the gear 10 and be installed in place.
[0047] In a preferred embodiment, the fixed bench is U-shaped, and a connecting plate 5 is provided on one side between the lower platform 1 and the upper platform 3 to connect and fix the lower platform 1 and the upper platform 3 into an integral body. The above settings not only tightly connect the lower platform 1 and the upper platform 3 into an integral body, but also significantly enhance the stability and integrity of the entire bench. Through such a layout, the gear 10 to be replaced with the axle pin 11 can be stably fixed on the bench. At the same time, the double-layer platform provides sufficient working space for the operator, making the process of replacing the axle pin 11 smoother. In particular, the introduction of the connecting plate 5 further strengthens the connection between the upper and lower platforms, ensuring stability and safety during the operation. In addition, the special design of the upper platform 3 provides an ideal position for the fixation and installation of the pin removal device, further improving the use efficiency and convenience of the tool.
[0048] In a preferred embodiment, the pin removal device includes a pin removal shaft 6, and the pin removal shaft 6 is set as a screw rod and is screwed and fixed in the screw hole 4 of the upper platform 3. The above settings enable the pin removal shaft 6 to be fixed on the upper platform 3 while realizing relative movement between the two, and can better ensure the coaxiality between the two. The design of the screw rod structure of the pin shaft 6 enables it to be accurately screwed and fixed in the screw hole 4 of the upper platform 3. It not only ensures the stable fixation of the pin removal shaft 6 on the upper platform, but also realizes flexible relative movement between the two, effectively guaranteeing the accuracy of the coaxiality between the two, thereby further improving the efficiency and accuracy of the operation of replacing the axle pin 11. At the same time, the design of the upper platform 3 also provides ideal conditions for the perfect integration of the pin removal device, promoting the smoothness and convenience of the overall operation.
[0049] In a preferred embodiment, the pin removal device further includes a handwheel 7, and the lower part of the handwheel 7 is detachably fixed to the top of the pin removal shaft 6. The above settings facilitate the operator's force application operation on the pin removal shaft 6, and through the rotation of the handwheel 7, the lifting or rotation of the pin removal shaft 6 can be controlled more smoothly, thereby improving the efficiency and convenience of the operation of removing and installing the axle pin 11.
[0050] In a preferred embodiment, a 15° - 20° guiding angle is provided at the front end of the pin removal shaft 6. The setting of the guiding angle gives full play to the precise positioning and force concentration of the pin removal shaft 6. It ensures the precise docking between the pin removal shaft 6 and the axle pin 11 of the gear 10, making the pin removal process smoother and more efficient, and at the same time avoiding potential damage to the gear 10 caused by force dispersion.
[0051] In a preferred embodiment, a gear positioning sleeve 8 is provided in the centering hole 2. The outer circle of the gear positioning sleeve 8 matches the inner hole of the centering hole 2, and the inner hole of the gear positioning sleeve 8 is adapted to the outer diameter of the positioning end face of the gear 10. The above settings ensure the precise positioning and stable installation of the gear 10, thereby further guaranteeing the operation accuracy of the device.
[0052] In a preferred solution, the outer circle of the gear positioning sleeve 8 is set to be stepped. The lower part is installed in the inner hole of the centering hole 2, and the step is mounted on the peripheral edge of the centering hole 2. With the above settings, while enabling the gear 10 and the centering hole 2 to be accurately positioned, the stepped structure not only realizes the precise positioning of the gear 10, but also effectively avoids the stress concentration phenomenon at the centering hole 2 by dispersing stress. This innovative design significantly broadens the applicable range of the device and effectively extends the service life of the overall device.
[0053] In a preferred solution, a set of support frames 9 are provided at the bottom of the lower layer platform 1. The support frames 9 are arranged on both sides of the centering hole 2 at the center of the lower layer platform 1, leaving the lower layer platform 1 suspended. With the above settings, while strengthening the lower layer platform 1, the lower layer platform 1 is suspended, which not only enhances the structural stability, facilitates the removal of the shaft pin 11, but also facilitates the maintenance and repair of the components below the lower layer platform.
[0054] In summary, the utility model provides a special device for replacing gear shaft pins, which solves the problem that there is no special gear shaft pin replacement tool in actual production, and the new developed specific tools and equipment on the market are difficult to operate, have poor applicability and high maintenance costs; the design of its double-layer operating platform reduces the installation workload while improving the stability and integrity of the device, making installation and transportation convenient; its U-shaped fixed stand not only provides a solid platform for the fixation of the gear 10, but also provides a stable operating space for the pin removal device through the setting of the upper platform 3. This double-layer design allows the operator to easily perform the pin removal operation without affecting the positioning of the gear 10, thereby greatly improving work efficiency and operation safety; in addition, the upper The screw hole 4 design at the center of the platform 3 makes it possible to accurately install and position the pin removal device, ensuring the smooth progress of the pin removal process; the step-type design adopted for the outer circle of the gear positioning sleeve 8 is not only a simple geometric innovation, but also a profound understanding and application of structural mechanics and functionality. This design cleverly embeds the lower part of the positioning sleeve into the inner hole of the centering hole 2, and the step part is firmly mounted on the edge of the centering hole 2, which not only realizes the accurate positioning of the gear 10, but also effectively avoids the stress concentration problem at the centering hole 2 by dispersing the stress, thereby significantly improving the durability and service life of the device; further, a group of support frames 9 carefully arranged at the bottom of the lower platform 1 not only enhances the strength of the lower platform 1, but also On both sides of the center hole 2, the platform is empty and stable, the overall stability of the device is improved, and sufficient space is reserved for subsequent operations, making the entire replacement process smoother and unobstructed; at the same time, the use of the support frame 9 also reduces the direct contact between the platform and the ground or other supporting surfaces, thereby reducing friction and wear, and further extending the service life of the device; in the design of the pin removal device, the pin removal shaft 6 designed by the utility model is driven by the rotation of the hand wheel 7 to achieve vertical downward force transmission. This design not only simplifies the operation process, but also makes the force transmission more direct and efficient; at the same time, the setting of the guide angle of the pin removal shaft 6 maximizes the precise positioning and force concentration; it ensures the pin removal shaft 6 and the gear 10 shaft pin 11 between the Precise docking makes the pin removal process smoother and more efficient, while avoiding potential damage to the gear 10 caused by force dispersion; the design of the positioning sleeve 8 and its structure not only realizes the precise positioning of the gear 10, but also effectively avoids the stress concentration phenomenon at the centering hole 2 by dispersing stress, while broadening the scope of application of the device and effectively extending the service life of the overall device; the utility model successfully solves the problem of no special gear 10 shaft pin 11 replacement tool in actual production through a series of careful designs and innovations, which not only reduces the difficulty of operation and maintenance costs, but also significantly improves work efficiency and product quality. Its simple structure, convenient operation and easy maintenance bring real convenience and benefits to the majority of users;In addition, the modular design concept of the present utility model makes the cooperation between components closer, and maintenance and replacement are more convenient and fast, greatly shortening the equipment downtime and winning precious time and benefits for enterprise production.
Claims
1. A special device for replacing a gear shaft pin, characterized in that: The invention comprises a fixed platform, on which a double-layer platform is arranged, a centering hole (2) is arranged at the center of the lower platform (1), a screw hole (4) is arranged at the center of the upper platform (3), a pin removal device is installed in the screw hole (4), the centering hole (2) of the lower platform (1) is concentric with the screw hole (4) of the upper platform (3), and is perpendicular to the mounting surface of the gear (10) on the lower platform (1), and a gear positioning sleeve (8) is installed in the centering hole (2) to position the gear (10).
2. A special device for replacing a gear shaft pin according to claim 1, characterized in that: The fixed platform is arranged in a U shape, and a connecting plate (5) is arranged on one side between the lower platform (1) and the upper platform (3) to connect and fix the lower platform (1) and the upper platform (3) into one body.
3. A special device for replacing a gear shaft pin according to claim 1, characterized in that: The pin removal device comprises a pin removal shaft (6), which is configured as a screw rod and is screwed and fixed in a screw hole (4) of the upper platform (3).
4. A special device for replacing a gear shaft pin according to claim 3, characterized in that: The pin removing device further comprises a hand wheel (7), the lower portion of the hand wheel (7) being detachably fixed to the top of the pin removing shaft (6).
5. A special device for replacing a gear shaft pin according to claim 3, characterized in that: The front end of the pin removal shaft (6) is provided with a guide angle of 15° to 20°.
6. A special device for replacing a gear shaft pin according to claim 1, characterized in that: The centering hole (2) is provided with a gear positioning sleeve (8), the outer circle of the gear positioning sleeve (8) matches the inner hole of the centering hole (2), and the inner hole of the gear positioning sleeve (8) matches the outer diameter of the positioning end face of the gear (10).
7. A special device for replacing a gear shaft pin according to claim 6, characterized in that: The outer circle of the gear positioning sleeve (8) is arranged in a step shape, and the lower part is installed in the inner hole of the centering hole (2), and the step is mounted on the peripheral edge of the centering hole (2).
8. A special device for replacing a gear shaft pin according to claim 3, characterized in that: A group of support frames (9) are arranged at the bottom of the lower platform (1), and the support frames (9) are arranged on both sides of the centering hole (2) in the center of the lower platform (1), so that the lower platform (1) is vacant.