Pin pulling-out device for speed reducer of large mill

Abstract

The utility model relates to a large mill speed reducer pin pulling-out device and relates to the technical field of mechanical assembly, in order to solve the problem that a pin is difficult to eject out, the large mill speed reducer pin pulling-out device comprises a supporting seat, a pulling-out mechanism used for pulling out the pin is arranged on the supporting seat, and the pulling-out mechanism comprises a pulling-out lead screw, a lower beam, an upper beam and a driving part; the driving part is arranged on the supporting seat, the output end of the driving part is connected to the upper beam, the lower beam is arranged below the supporting seat, the lower beam is detachably connected with the upper beam, the jacking and pulling screw rod is connected to the bottom of the lower beam, and a threaded part used for being screwed with a pin is arranged at the end of the jacking and pulling screw rod. The device has the effects that jacking force can be generated more quickly, and the pulling-out efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of mechanical assembly, and in particular to a pin extraction device for a large-scale mill reducer. Background Art

[0002] Large-scale mill reducers are indispensable and important equipment in the industrial field. They are widely used in many industries such as coal, electricity, and metallurgy. Their internal structure is compactly designed, and they achieve power deceleration and transmission through multi-stage gear transmission, thus meeting the working needs of various large-scale mechanical equipment. During the assembly process of the mill reducer, in order to ensure stable connection and precise positioning between the various components, fixing pins are often used for connection and fixation. These pins not only play a connecting role, but also can withstand the huge torque and vibration during the operation of the equipment, ensuring the normal operation of the reducer.

[0003] In actual applications, due to the compact internal structure of large mill reducers, commonly used fixing pins are often sunk into the mechanism, making them difficult to pull out directly. These pins are designed with internal threads in the middle so that when maintenance or replacement is required, the pins can be taken out from the reducer by screwing in and lifting the bolts. However, due to the lack of dedicated extraction tools, the bolt ejection process is often accompanied by uneven force, making ejection difficult and even potentially damaging the internal structure of the mill reducer, so this problem needs to be improved. Utility Model Content

[0004] In order to solve the problem of difficulty in ejecting pins, the present application provides a pin extraction device for a large-scale mill reducer.

[0005] The present application provides a large mill reducer pin extraction device that adopts the following technical solution:

[0006] A pin pulling device for a large mill reducer includes a support seat, a pulling mechanism for pulling out pins is provided on the support seat, the pulling mechanism includes a pulling rod, a lower beam, an upper beam and a driving member, the driving member is arranged on the support seat, the output end of the driving member is connected to the upper beam, the lower beam is arranged below the support seat, the lower beam is detachably connected to the upper beam, the pulling rod is connected to the bottom of the lower beam, and the end of the pulling rod is provided with a threaded portion for tightening with the pin.

[0007] Due to the lack of a dedicated extraction tool, the process of ejecting the bolt is often accompanied by the problem of uneven force, which makes ejection difficult and may even damage the internal structure of the mill reducer. By adopting the above technical solution, including a support seat, the extraction mechanism is installed on the support seat, and the extraction mechanism includes an ejection rod, a lower beam, an upper beam and a driving member. When it is necessary to extract the pin, the ejection rod is screwed into the pin through the threaded portion, the lower beam is inserted from the ejection rod, and the driving member is started to start working and generate a lifting force. As the lifting is carried out, the upper beam will be gradually lifted, and at the same time, the ejection rod will also drive the pin to move upward until the pin is completely extracted.

[0008] Through the arrangement of the top drawing rod, lower beam, upper beam and driving parts, the structure is simple and the design is reasonable, which ensures the stability and reliability of the pulling process, is easy to maintain, and is convenient for daily maintenance and troubleshooting. At the same time, during the pulling process, the top drawing rod and the pin are always subjected to vertical pulling force, which reduces the problem of bending of the top drawing rod or damage to the reducer caused by uneven force, and extends the service life of the equipment. Compared with traditional manual or mechanical pulling methods, it can generate lifting force more quickly and improve the pulling efficiency.

[0009] Optionally, the driving member includes an electric jack, which is arranged on a support seat, and an ejection end of the electric jack is connected to the lower surface of the upper beam, and the ejection end of the electric jack is located at the center of the upper beam.

[0010] By adopting the above technical solution, the driving part includes an electric jack; the electric jack is started to start working and generate a lifting force. As the electric jack is lifted, the upper beam will be gradually lifted, and at the same time, the top screw rod will also drive the pin to move upward; through the setting of the electric jack, a strong lifting force can be quickly generated, so that the top screw rod can lift the pin quickly and smoothly, shortening the time to pull out the pin and improving work efficiency.

[0011] Optionally, the upper beam and the lower beam are symmetrically arranged on both sides of the support seat, the upper beam and the lower beam correspond to each other, and the upper beam and the lower beam together constitute a frame structure.

[0012] By adopting the above technical solution, the upper beam and the lower beam together form a frame structure; through the setting of the upper beam and the lower beam structure, a stable frame structure is formed, which can effectively resist external loads and deformation, ensure that the pulling device remains overall stable during the pulling process, is not prone to tilting or collapse, and has uniform force distribution.

[0013] Optionally, a first raised portion is provided at the bottom of the upper beam, and a second raised portion is provided at the top of the lower beam. The first raised portion is fitted with the second raised portion, and an adjustment mechanism is provided between the first raised portion and the second raised portion.

[0014] By adopting the above technical solution, the first protrusion is integrally formed at the bottom of the upper beam, and the second protrusion is integrally formed at the top of the lower beam; by setting the first protrusion and the second protrusion, the contact area between the upper beam and the lower beam can be increased, the connection strength between the two is improved, and the risk of pull-out failure or equipment damage due to structural instability is reduced.

[0015] Optionally, the number of the first protrusions and the second protrusions is two groups, and the two groups of the first protrusions and the second protrusions are respectively arranged on both sides of the upper beam and the lower beam.

[0016] By adopting the above technical solution, the number of the first protrusions and the second protrusions is two groups; by setting the number, the connection between the upper beam and the lower beam is more stable, which helps to maintain the balance of the pulling device during the pulling process, prevents tilting or collapse due to excessive force on one side, and further enhances the structural stability.

[0017] Optionally, the adjustment mechanism includes an adjusting screw and an adjusting nut, one end of the adjusting screw is fixedly connected to the second protrusion, the other end of the adjusting screw passes through the first protrusion, the adjusting nut is arranged on one side of the first protrusion, and the adjusting nut is threadedly connected to the adjusting screw.

[0018] By adopting the above technical solution, the adjustment mechanism includes an adjusting screw and an adjusting nut; the upper beam is connected to the lower beam through the adjusting screw, the adjusting screw is welded to the lower beam, and is fixed to the upper beam through the adjusting nut; through the setting of the adjusting screw and the adjusting nut, the combination of the adjusting screw and the adjusting nut provides a method for accurately adjusting the relative position between the upper beam and the lower beam, thereby achieving fine-tuning of the upper beam position and ensuring that the pulling device always maintains the best working state during the pulling process.

[0019] Optionally, a level for detecting the horizontal position is provided on the top of the upper beam, and the level is arranged at the center of the upper surface of the upper beam.

[0020] By adopting the above technical solution, the spirit level is installed on the top of the upper beam; before the locking nut is subjected to force, the electric jack gradually lifts up the upper and lower beam frame structures. When the locking nut is just subjected to force, observe the position of the small water drop in the spirit level. If it is biased to the right, screw down the left adjustment nut. Similarly, gradually adjust the small water drop to the center of the spirit level, and then the electric jack continues to push it out. During the process, always observe the position of the small water drop. If there is an offset, repeat the above adjustment until the pin is pulled out. By setting the spirit level and observing the position of the small water drop in the spirit level, the operator can intuitively understand the inclination of the pull-out device and make precise adjustments accordingly, which simplifies the operation process, reduces the skill requirements for the operator, and can accurately judge whether the pull-out device is in a horizontal state, ensuring that the pull-out device always remains horizontal during the pulling process, thereby improving the precision and accuracy of the pull-out.

[0021] Optionally, a through hole is formed through the bottom of the lower beam for the top screw drawing rod to pass through, and a locking nut for threaded connection with the top screw drawing rod is provided on the lower beam.

[0022] By adopting the above technical solution, a through hole is opened through the bottom of the lower beam, and the top drawing rod passes through and is threadedly connected with the locking nut; through the setting of the locking nut, the locking nut can tightly fix the top drawing rod to prevent it from loosening or falling off, ensuring that the pulling device can stably withstand the pulling force, and at the same time can finely adjust the top drawing rod to meet the needs of different pulling tasks.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] The arrangement of the top drawing rod, lower beam, upper beam and driving parts has a simple structure and reasonable design, which ensures the stability and reliability of the extraction process and is easy to maintain, facilitating daily maintenance and troubleshooting. At the same time, during the extraction process, the top drawing rod and the pin are always subjected to vertical tension, which reduces the problem of the top drawing rod bending or the reducer damage caused by uneven force, thereby extending the service life of the equipment. Compared with traditional manual or mechanical extraction methods, it can generate lifting force more quickly and improve extraction efficiency.

[0025] The electric jack can quickly generate a strong lifting force, so that the screw rod can quickly and smoothly lift the pin, shortening the time to pull out the pin and improving work efficiency.

[0026] By setting the spirit level and observing the position of the small water droplets in the spirit level, the operator can intuitively understand the inclination of the extraction device and make precise adjustments accordingly, which simplifies the operation process and reduces the skill requirements for the operator. It can accurately judge whether the extraction device is in a horizontal state, ensuring that the extraction device always remains horizontal during the extraction process, thereby improving the precision and accuracy of extraction. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of a pin extraction device for a large mill reducer in an embodiment of the present application.

[0028] Figure 2 It is a structural diagram used to reflect the connection relationship between the upper beam and the lower beam in the embodiment of the present application.

[0029] Explanation of the accompanying reference numerals: 1. Support seat; 2. Pull-out mechanism; 21. Top screw rod; 22. Lower beam; 23. Upper beam; 24. Driving member; 241. Electric jack; 3. Threaded portion; 4. Level; 5. First protrusion; 6. Second protrusion; 7. Adjusting mechanism; 71. Adjusting screw rod; 72. Adjusting nut; 8. Through hole; 9. Locking nut. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-2 This application is described in further detail.

[0031] The embodiment of the present application discloses a large mill reducer pin extraction device. Figure 1 The large mill reducer pin pulling device includes a support base 1. In this embodiment, the support base 1 can be installed on the ground. A pulling mechanism 2 is installed on the support base 1, and the pulling mechanism 2 is used to pull out the pin.

[0032] Reference Figure 1 The pulling-out mechanism 2 includes a screw-pulling rod 21, a lower beam 22, an upper beam 23 and a driving member 24. The driving member 24 is installed on the support base 1. The driving member 24 can be an electric jack 241. The electric jack 241 is installed on the support base 1. The ejection end of the electric jack 241 is connected to the lower surface of the upper beam 23. In this embodiment, the ejection end of the electric jack 241 is located at the center of the upper beam 23; the electric jack 241 can quickly generate a strong lifting force, so that the screw-pulling rod 21 can quickly and smoothly lift the pin, shortening the time for pulling out the pin and improving work efficiency.

[0033] Reference Figure 1 In this embodiment, the upper beam 23 and the lower beam 22 have the same structure. The upper beam 23 and the lower beam 22 are arranged symmetrically. The upper beam 23 and the lower beam 22 correspond to each other. The upper beam 23 and the lower beam 22 together form a frame structure, which can effectively resist external loads and deformation, ensuring that the pulling device maintains overall stability during the pulling process, is not prone to tilting or collapse, and has uniform force distribution.

[0034] Reference Figure 1 and Figure 2 A first protrusion 5 is integrally formed at the bottom of the upper beam 23, and a second protrusion 6 is integrally formed at the top of the lower beam 22. The first protrusion 5 is in contact with the second protrusion 6. In this embodiment, there are two groups of first protrusions 5 and second protrusions 6. The two groups of first protrusions 5 and second protrusions 6 are respectively arranged on both sides of the upper beam 23 and the lower beam 22, which can increase the contact area between the upper beam 23 and the lower beam 22, improve the connection strength between the two, and reduce the risk of extraction failure or equipment damage due to structural instability.

[0035] Reference Figure 1 and Figure 2In this embodiment, an adjustment mechanism 7 is installed between any first protrusion 5 and the corresponding second protrusion 6. The adjustment mechanism 7 includes an adjusting screw 71 and an adjusting nut 72. One end of the adjusting screw 71 is welded and fixed to the second protrusion 6. The other end of the adjusting screw 71 passes through the corresponding first protrusion 5. A hole for the adjusting screw 71 to pass through is opened on the first protrusion 5. The adjusting nut 72 is arranged on one side of the first protrusion 5 and is threadedly connected to the adjusting screw 71. The combination of the adjusting screw 71 and the adjusting nut 72 provides a method for accurately adjusting the relative position between the upper beam 23 and the lower beam 22, thereby achieving fine-tuning of the position of the upper beam 23 and ensuring that the pulling device always maintains the best working condition during the pulling process.

[0036] Reference Figure 1 At the same time, a spirit level 4 is installed on the top of the upper beam 23, and the spirit level 4 is located at the center of the upper surface of the upper beam 23; by observing the position of the small water droplets in the spirit level 4, the operator can intuitively understand the inclination of the extraction device and make precise adjustments accordingly, which simplifies the operation process and reduces the requirements for the operator's skills. It can accurately judge whether the extraction device is in a horizontal state, ensure that the extraction device always remains horizontal during the extraction process, and improve the precision and accuracy of the extraction.

[0037] Reference Figure 1 and Figure 2 A through hole 8 is opened through the bottom of the lower beam 22. In this embodiment, the through hole 8 can be used for the top screw rod 21 to pass through. A locking nut 9 is installed on the lower beam 22. The locking nut 9 is threadedly connected to the end of the top screw rod 21. The locking nut 9 can tightly fix the top screw rod 21 to prevent it from loosening or falling off, ensuring that the pulling device can stably withstand the pulling force. At the same time, the top screw rod 21 can be finely adjusted to meet the needs of different pulling tasks.

[0038] Reference Figure 1 and Figure 2 The end of the top screw rod 21 away from the locking nut 9 is integrally formed with a threaded portion 3. In this embodiment, the threaded portion 3 is used to tighten with the corresponding pin to be pulled out, making it convenient to pull out the pin.

[0039] The implementation principle of the pin extraction device of a large mill reducer in the embodiment of the present application is as follows: when it is necessary to extract the pin, the top screw rod 21 is screwed into the pin through the threaded portion 3, the lower beam 22 is inserted from the top screw rod 21, and the locking nut 9 is screwed in to fix it, and the electric jack 241 is started to gradually lift the frame structure of the upper beam 23 and the lower beam 22. During this process, pay attention to observe whether the locking nut 9 begins to be stressed;

[0040] When the locking nut 9 is just under force, observe the position of the small water drop in the spirit level 4. If the small water drop is to the right, adjust the upper beam 23 to the left by adjusting the nut 72. If the small water drop is to the left, adjust it to the right. Repeat the above adjustment process until the small water drop is in the center of the spirit level 4. Continue to start the electric jack 241 to perform the ejection operation. The ejection screw rod 21 will also drive the pin to move upward until the pin is completely pulled out.

[0041] Through the arrangement of the top drawing screw rod 21, the lower beam 22, the upper beam 23 and the driving member 24, the structure is simple and the design is reasonable, which ensures the stability and reliability of the pulling-out process, is easy to maintain, and is convenient for daily maintenance and troubleshooting. At the same time, during the pulling-out process, the top drawing screw rod 21 and the pin are always subjected to vertical pulling force, which reduces the problem of bending of the top drawing screw rod 21 or damage to the reducer caused by uneven force, extends the service life of the equipment, and can generate lifting force more quickly than traditional manual or mechanical pulling-out methods, thereby improving the pulling-out efficiency.

[0042] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A pin extraction device for a large mill reducer, characterized in that: The invention comprises a support seat (1), wherein a pulling mechanism (2) for pulling out a pin is provided on the support seat (1), wherein the pulling mechanism (2) comprises a pulling rod (21), a lower beam (22), an upper beam (23) and a driving member (24), wherein the driving member (24) is arranged on the support seat (1), and an output end of the driving member (24) is connected to the upper beam (23), and the lower beam (22) is arranged below the support seat (1). The lower beam (22) and the upper beam (23) are detachably connected, and the pulling rod (21) is connected to the bottom of the lower beam (22), and a threaded portion (3) for tightening with the pin is provided at the end of the pulling rod (21).

2. A large mill reducer pin extraction device according to claim 1, characterized in that: The driving member (24) includes an electric jack (241), which is arranged on the support seat (1), and the ejection end of the electric jack (241) is connected to the lower surface of the upper beam (23), and the ejection end of the electric jack (241) is located at the center of the upper beam (23).

3. A large mill reducer pin extraction device according to claim 1, characterized in that: The upper beam (23) and the lower beam (22) are symmetrically arranged on both sides of the support seat (1), the upper beam (23) and the lower beam (22) correspond to each other, and the upper beam (23) and the lower beam (22) together form a frame structure.

4. A large mill reducer pin extraction device according to claim 1, characterized in that: A first raised portion (5) is provided at the bottom of the upper beam (23), and a second raised portion (6) is provided at the top of the lower beam (22); the first raised portion (5) and the second raised portion (6) are fitted together, and an adjustment mechanism (7) is provided between the first raised portion (5) and the second raised portion (6).

5. A large mill reducer pin extraction device according to claim 4, characterized in that: The number of the first protrusions (5) and the second protrusions (6) is two groups, and the two groups of the first protrusions (5) and the second protrusions (6) are respectively arranged on both sides of the upper beam (23) and the lower beam (22).

6. A large mill reducer pin extraction device according to claim 5, characterized in that: The adjusting mechanism (7) comprises an adjusting screw (71) and an adjusting nut (72); one end of the adjusting screw (71) is fixedly connected to the second protrusion (6); the other end of the adjusting screw (71) passes through the first protrusion (5); the adjusting nut (72) is arranged on one side of the first protrusion (5); and the adjusting nut (72) is threadedly connected to the adjusting screw (71).

7. A large mill reducer pin extraction device according to claim 6, characterized in that: A level meter (4) for detecting a horizontal position is provided on the top of the upper beam (23), and the level meter (4) is arranged at the center of the upper surface of the upper beam (23).

8. The pin extraction device for a large mill reducer according to claim 1, characterized in that: A through hole (8) for the top screw rod (21) to pass through is formed through the bottom of the lower beam (22), and a locking nut (9) for threaded connection with the top screw rod (21) is provided on the lower beam (22).

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