Press fitting unit for gear

Abstract

The utility model relates to a gear press-fitting unit which comprises a pedestal and a press-fitting module arranged on the pedestal, and a notch cavity is formed in the front side of the pedestal. The press-fitting module comprises a straightening mechanism arranged in the notch cavity and a power assembly arranged on the top of the pedestal and matched with the straightening mechanism. The power assembly comprises a top plate transversely fixed to the top of the pedestal, a first panel, a second panel, a reference block fixed between the top plate and the top of the pedestal in a penetrating mode, and a lifting column movably and vertically arranged in the reference block in a penetrating mode, wherein the first panel and the second panel are vertically fixed to the top of the top plate and arranged in a front-back mode. The traction mechanism is arranged between the first panel and the second panel and is connected with the lifting column; according to the utility model, the direction of the rotating shaft is effectively restrained by means of the first conical sleeve and the second conical sleeve, so that the concentricity deviation of the rotating shaft and the gear during crimping is effectively avoided; in addition, the overall height is reduced, so that movement and use are facilitated.

Description

Technical Field

[0001] This utility model relates to a gear press-fitting unit. Background Technology

[0002] Gears are among the most common components in mechanical transmission, widely used in machine tools, automobiles, aircraft, power, and other fields. Their function is to transmit power and torque. To achieve gear transmission, a matching rotary shaft is usually inserted into the gear. Since the installation relationship between the rotary shaft and the gear is an interference fit, the rotary shaft is mostly installed by pressing it vertically into the gear using press-fitting equipment. However, existing press-fitting equipment lacks effective constraint on the rotary shaft. When the rotary shaft is subjected to a sudden large pressure from the press-fitting equipment, it is easy for the shaft to become skewed or displaced during the pressing process, leading to a significant deviation in the concentricity of the rotary shaft and the gear. Furthermore, the cylinders used to press the rotary shaft are mostly vertically positioned above the shaft to accommodate the pressing direction, resulting in a relatively high overall height of the press-fitting equipment, making movement and use inconvenient and requiring further improvement. Utility Model Content

[0003] In view of the current state of the prior art, the technical problem to be solved by this utility model is to provide a pressing unit that can effectively position and buffer the rotary shaft to prevent it from tilting or shifting when subjected to large instantaneous pressure, thereby effectively avoiding the deviation of the concentricity between the rotary shaft and the gear during pressing, and also reducing the overall height of the gear to facilitate movement and use.

[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a gear pressing unit, including a base and a pressing module disposed on the base, wherein the front side of the base has a notch.

[0005] The pressing module includes a straightening mechanism located inside the notch and a power assembly located on the top of the pedestal and cooperating with the straightening mechanism.

[0006] The power assembly includes a top plate fixed horizontally to the top of the platform, a first panel and a second panel fixed vertically to the top of the top plate and respectively arranged front and rear, a reference block inserted and fixed between the top plate and the top of the platform, a lifting column movably and vertically inserted in the reference block, and a traction mechanism located between the first panel and the second panel and connected to the lifting column.

[0007] The traction mechanism includes a traction cylinder, a transmission block, a first rocker arm, and a second rocker arm. The fixed end of the traction cylinder is rotatably connected to the second panel, and the telescopic end of the traction cylinder is forward-facing. The transmission block is fixed to the first panel. One end of the first rocker arm is rotatably connected to the upper end of the lifting column, and one end of the second rocker arm is rotatably connected to the transmission block. The other ends of both the first and second rocker arms are rotatably connected to the telescopic end of the traction cylinder.

[0008] The straightening mechanism includes a base plate that is horizontally and detachably fixed to the bottom of the notch, a cover plate that is horizontally positioned above the base plate, a first pressure plate that is horizontally positioned between the base plate and the cover plate, a second pressure plate that is horizontally positioned between the first pressure plate and the cover plate, and four traction columns that are vertically fixed between the base plate and the cover plate and are interspersed in the first and second pressure plates and symmetrically distributed in pairs. The lower end of the lifting column passes through the cover plate and is detachably fixed to the second pressure plate.

[0009] Preferably, the power assembly further includes a positioning post vertically inserted into the first pressure plate and a buffer spring sleeved outside the positioning post and located between the first pressure plate and the second pressure plate.

[0010] Preferably, the end of the positioning post is further fixed with a first conical sleeve, which is located below the first pressure plate. The upper and lower ends of the buffer spring are respectively pressed against the bottom of the second pressure plate and the top of the first pressure plate so that the root of the first conical sleeve fits against the bottom of the first pressure plate.

[0011] Preferably, a second conical sleeve is also fixed to the top of the base plate, and the second conical sleeve is concentrically disposed below the first conical sleeve.

[0012] Preferably, two vertically arranged guide bolts are also interspersed in the second pressure plate. The two guide bolts are symmetrically arranged on the left and right sides of the positioning column, and the threaded ends of the two guide bolts are inserted into and screwed to the top of the first pressure plate. A reset spring is also sleeved on the outside of each guide bolt. The upper and lower ends of each reset spring are respectively pressed against the bottom of the second pressure plate and the top of the first pressure plate.

[0013] Preferably, the top of the base plate is further fixed with two first bases respectively located on the left and right sides of the second conical sleeve. Correspondingly, the bottom of the first pressure plate is further fixed with two second bases respectively located on the left and right sides of the first conical sleeve, and the ends of the two second bases are respectively located directly above the ends of the two first bases.

[0014] Preferably, a plurality of inner support columns are fixed between the first panel and the second panel, and a detachable protective cover is fixed between the first panel and the second panel, the protective cover covering the outside of the traction mechanism and the plurality of inner support columns.

[0015] Preferably, a U-shaped traction block is fixed on the telescopic end of the traction cylinder, and the other ends of the first rocker arm and the second rocker arm are rotatably connected in the U-shaped traction block.

[0016] Preferably, the first panel is also threaded with a number of stop bolts, the threaded end of each stop bolt extending laterally to the front of the U-shaped traction block and engaging with the end of the U-shaped traction block.

[0017] Compared with the prior art, the advantages of this utility model are as follows: This utility model divides the pressing process of the rotary shaft into two steps. The first step is the pre-pressing process, and the direction of the rotary shaft is effectively constrained by the first and second conical sleeves, thereby effectively positioning and buffering the rotary shaft to prevent it from tilting or shifting when subjected to large instantaneous pressure, thus effectively avoiding the deviation of the concentricity between the rotary shaft and the gear. In addition, the first and second rocker arms are used to realize the horizontal placement of the traction cylinder, thereby reducing the overall height for easy movement and use. Attached Figure Description

[0018] Figure 1 This is an exploded view of the left front side of this utility model;

[0019] Figure 2 This is an exploded view of the left rear side of this utility model. Detailed Implementation

[0020] Unless otherwise defined, the technical or scientific terms used in this utility model shall have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0021] To keep the following description of the embodiments of this utility model clear and concise, detailed descriptions of known functions and known components are omitted.

[0022] like Figures 1-2As shown, a gear pressing unit includes a base 1 and a pressing module disposed on the base 1. The front side of the base 1 has a notch 101.

[0023] The press-fit module includes a straightening mechanism 3 located inside the cavity 101 and a power assembly 2 located on the top of the base 1 and cooperating with the straightening mechanism 3.

[0024] The power assembly 2 includes a top plate 21 that is horizontally fixed to the top of the platform 1, a first panel 23 and a second panel 22 that are vertically fixed to the top of the top plate 21 and respectively arranged in front and behind, a reference block 26 that is inserted and fixed between the top plate 21 and the top of the platform 1, a lifting column 27 that is movably and vertically inserted in the reference block 26, and a traction mechanism that is located between the first panel 23 and the second panel 22 and connected to the lifting column 27.

[0025] The traction mechanism includes a traction cylinder 24, a transmission block 25, a first rocker arm 28, and a second rocker arm 29. The fixed end of the traction cylinder 24 is rotatably connected to the second panel 22, and the telescopic end of the traction cylinder 24 is forward-facing. The transmission block 25 is fixed to the first panel 23. One end of the first rocker arm 28 is rotatably connected to the upper end of the lifting column 27, and one end of the second rocker arm 29 is rotatably connected to the transmission block 25. The other ends of the first rocker arm 28 and the second rocker arm 29 are rotatably connected to the telescopic end of the traction cylinder 24.

[0026] The straightening mechanism 3 includes a base plate 31 that is horizontally and detachably fixed to the bottom of the notch 101, a cover plate 32 that is horizontally arranged above the base plate 31, a first pressure plate 34 that is horizontally arranged between the base plate 31 and the cover plate 32, a second pressure plate 35 that is horizontally arranged between the first pressure plate 34 and the cover plate 32, and four traction columns 33 that are vertically fixed between the base plate 31 and the cover plate 32 and are interspersed in the first pressure plate 34 and the second pressure plate 35 and are symmetrically distributed in pairs. The lower end of the lifting column 27 passes through the cover plate 32 and is detachably fixed to the second pressure plate 35.

[0027] The power assembly 2 also includes a positioning post 211 vertically inserted in the first pressure plate 34 and a buffer spring 212 sleeved outside the positioning post 211 and located between the first pressure plate 34 and the second pressure plate 35.

[0028] The end of the positioning post 211 is also fixed with a first conical sleeve 210. The first conical sleeve 210 is located below the first pressure plate 34. The upper and lower ends of the buffer spring 212 are respectively pressed against the bottom of the second pressure plate 35 and the top of the first pressure plate 34 so that the root of the first conical sleeve 210 fits against the bottom of the first pressure plate 34.

[0029] A second conical sleeve 310 is also fixed to the top of the base plate 31, and the second conical sleeve 310 is concentrically located below the first conical sleeve 210.

[0030] Two vertically arranged guide bolts 36 are also interspersed in the second pressure plate 35. The two guide bolts 36 are symmetrically arranged on the left and right sides of the positioning post 211. The threaded ends of the two guide bolts 36 are inserted into and screwed to the top of the first pressure plate 34. Each guide bolt 36 is also fitted with a return spring 37. The upper and lower ends of each return spring 37 are respectively pressed against the bottom of the second pressure plate 35 and the top of the first pressure plate 34.

[0031] The top of the base plate 31 is also fixed with two first bases 38 respectively located on the left and right sides of the second conical sleeve 310. Correspondingly, the bottom of the first pressure plate 34 is also fixed with two second bases 39 respectively located on the left and right sides of the first conical sleeve 210. The ends of the two second bases 39 are respectively located directly above the ends of the two first bases 38.

[0032] Several internal support columns 214 are also fixed between the first panel 23 and the second panel 22.

[0033] A detachable protective cover 213 is also fixed between the first panel 23 and the second panel 22. The protective cover 213 covers the outside of the traction mechanism and several inner support columns 214 to provide protection and dust protection.

[0034] A U-shaped traction block 215 is also fixed on the telescopic end of the traction cylinder 24. The other end of the first rocker arm 28 and the other end of the second rocker arm 29 are rotatably connected to the U-shaped traction block 215.

[0035] Several stop bolts 216 are also screwed into the first panel 23. The threaded end of each stop bolt 216 extends laterally to the front of the U-shaped traction block 215 and cooperates with the end of the U-shaped traction block 215 to prevent the U-shaped traction block 215 from moving excessively.

[0036] Working principle: One end of the rotary shaft is vertically inserted into the second conical sleeve 310, and then the matching gear is fitted from top to bottom onto the other end of the rotary shaft and positioned above the second conical sleeve 310; the telescopic end of the drive traction cylinder 24 extends outward to drive the lifting column 27 to move vertically downward in the reference block 26 with the help of the U-shaped traction block 215 and the first rocker arm 28. During this process, since the transmission block 25 is fixed, the U-shaped traction block 215 will also drive the end of the second rocker arm 29 to swing forward while following the first rocker arm 28 to tilt downward, thereby increasing the downward force and stability of the lifting column 27. The traction cylinder 24 itself will also rotate downward to a certain extent to adapt to the movement of the U-shaped traction block 215.

[0037] When the lifting column 27 moves downward, it drives the second pressure plate 35 downward, which in turn, with the help of the two return springs 37 and the two guide bolts 36, drives the first pressure plate 34 downward as well. This causes the first conical sleeve 210 to move downward until its end presses against the gear. Due to the presence of the two return springs 37 and the two guide bolts 36, after the end of the first conical sleeve 210 contacts the gear, it pushes the first pressure plate 34 upward to compress the two return springs 37 and cause the heads of the two guide bolts 36 to move upward. At this time, the gear... The pressure from the first conical sleeve 210 is relatively small. Although it will move down a certain distance along the rotating shaft to allow the other end of the rotating shaft to be inserted into the interior of the first conical sleeve 210, its most important function is to provide positioning and buffering. As the second pressure plate 35 continues to move down, the positioning pin 211 will directly push the first conical sleeve 210 downward and compress the buffer spring 212. Then, with the help of the first conical sleeve 210, the gear will continue to be pressed down until the bottom of the gear contacts the end of the second conical sleeve 310. At this time, the gear reaches the predetermined position on the rotating shaft and the assembly is completed.

[0038] After assembly, the telescopic end of the drive traction cylinder 24 retracts inward to move the second pressure plate 35 upward in the same way, thereby slowly releasing the rebound force of the two return springs 37 until the heads of the two guide bolts 36 contact the top of the second pressure plate 35. During this process, the rebound force of the buffer spring 212 will also be slowly released until the root of the first conical sleeve 210 is attached to the bottom of the first pressure plate 34. After the first conical sleeve 210 is completely separated from the rotating shaft, the rotating shaft and gear can be lifted upward by hand to be removed.

[0039] This invention divides the pressing process of the rotary shaft into two steps. The first step is a pre-pressing process, in which the direction of the rotary shaft is effectively constrained by the first conical sleeve 210 and the second conical sleeve 310, thereby effectively positioning and buffering the rotary shaft to prevent it from tilting or shifting when subjected to large instantaneous pressure, thus effectively avoiding deviation in the concentricity of the rotary shaft and the gear. In addition, the first rocker arm 28 and the second rocker arm 29 are used to realize the horizontal placement of the traction cylinder 24, which reduces the overall height for easy movement and use.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A gear pressing unit, comprising a base and a pressing module disposed on the base, wherein the front side of the base has a notch, characterized in that: The pressing module includes a straightening mechanism located inside the notch and a power assembly located on the top of the pedestal and cooperating with the straightening mechanism. The power assembly includes a top plate fixed horizontally to the top of the platform, a first panel and a second panel fixed vertically to the top of the top plate and respectively arranged front and rear, a reference block inserted and fixed between the top plate and the top of the platform, a lifting column movably and vertically inserted in the reference block, and a traction mechanism located between the first panel and the second panel and connected to the lifting column. The traction mechanism includes a traction cylinder, a transmission block, a first rocker arm, and a second rocker arm. The fixed end of the traction cylinder is rotatably connected to the second panel, and the telescopic end of the traction cylinder is forward-facing. The transmission block is fixed to the first panel. One end of the first rocker arm is rotatably connected to the upper end of the lifting column, and one end of the second rocker arm is rotatably connected to the transmission block. The other ends of both the first and second rocker arms are rotatably connected to the telescopic end of the traction cylinder. The straightening mechanism includes a base plate that is horizontally and detachably fixed to the bottom of the notch, a cover plate that is horizontally positioned above the base plate, a first pressure plate that is horizontally positioned between the base plate and the cover plate, a second pressure plate that is horizontally positioned between the first pressure plate and the cover plate, and four traction columns that are vertically fixed between the base plate and the cover plate and are interspersed in the first and second pressure plates and symmetrically distributed in pairs. The lower end of the lifting column passes through the cover plate and is detachably fixed to the second pressure plate.

2. The gear press-fitting unit according to claim 1, characterized in that, The power assembly also includes a positioning post vertically inserted into the first pressure plate and a buffer spring sleeved outside the positioning post and located between the first pressure plate and the second pressure plate.

3. The gear press-fitting unit according to claim 2, characterized in that, The end of the positioning post is also fixed with a first conical sleeve, which is located below the first pressure plate. The upper and lower ends of the buffer spring are respectively pressed against the bottom of the second pressure plate and the top of the first pressure plate so that the root of the first conical sleeve fits against the bottom of the first pressure plate.

4. The gear press-fitting unit according to claim 3, characterized in that, A second conical sleeve is also fixed to the top of the base plate, and the second conical sleeve is concentrically located below the first conical sleeve.

5. The gear press-fitting unit according to claim 2, characterized in that, Two vertically arranged guide bolts are also interspersed in the second pressure plate. The two guide bolts are symmetrically arranged on the left and right sides of the positioning column. The threaded ends of the two guide bolts are inserted into and screwed to the top of the first pressure plate. A reset spring is also sleeved on the outside of each guide bolt. The upper and lower ends of each reset spring are respectively pressed against the bottom of the second pressure plate and the top of the first pressure plate.

6. The gear press-fitting unit according to claim 4, characterized in that, The top of the base plate is also fixed with two first bases respectively located on the left and right sides of the second conical sleeve. Correspondingly, the bottom of the first pressure plate is also fixed with two second bases respectively located on the left and right sides of the first conical sleeve. The ends of the two second bases are respectively located directly above the ends of the two first bases.

7. The gear press-fitting unit according to claim 6, characterized in that, Several inner support columns are fixed between the first panel and the second panel, and a detachable protective cover is also fixed between the first panel and the second panel. The protective cover covers the outside of the traction mechanism and the several inner support columns.

8. The gear press-fitting unit according to claim 1, characterized in that, A U-shaped traction block is also fixed on the telescopic end of the traction cylinder, and the other ends of the first rocker arm and the second rocker arm are rotatably connected to the U-shaped traction block.

9. A gear press-fitting unit according to claim 8, characterized in that, The first panel is also threaded with several stop bolts, the threaded end of each stop bolt extending laterally to the front of the U-shaped traction block and engaging with the end of the U-shaped traction block.

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