Roller withdrawing device of cylindrical roller axle box bearing

Abstract

The utility model discloses a roller withdrawal device of a cylindrical roller axle box bearing. The roller withdrawal device comprises a device base, an outer ring clamping mechanism, a roller clamping mechanism and a pinch bar mechanism. The device base is in a horizontal U shape; the outer ring clamping mechanism comprises a bottom supporting mechanism and a top limiting mechanism; the bottom supporting mechanism comprises two supporting seats which are transversely fixed on the device bottom plate and a pair of outer ring supporting wheels which are longitudinally bridged between the top surfaces of the two heads of the two supporting seats; the top limiting mechanism comprises a locking air cylinder installed on the top face of the device top plate and an outer ring pressing block connected to the locking air cylinder and located below the device top plate. The roller clamping mechanism comprises a clamping frame arranged between the middle parts of the two supporting seats and two clamping screws mounted on the clamping frame; the pinch bar mechanism comprises a pinch bar hinged to the middle of the bottom face of the clamping frame and placed on a pinch bar support and two guide rods fixed to the bottom face of the clamping frame. According to the utility model, the roller can be ensured not to additionally damage bearing parts in the withdrawing process.

Description

Technical Field

[0001] This utility model relates to a roller removal device for a cylindrical roller bearing. Background Technology

[0002] Separable double-row cylindrical roller bearings are a typical structure for railway bearings. They consist of two independent single-row cylindrical roller bearings, with the outer ring assembly of each bearing axially separable from the inner ring for easy installation and maintenance. The cylindrical rollers are the core component of this type of bearing, primarily responsible for load bearing. The nylon cage, besides isolating and evenly distributing the rollers, also radially restrains them, thus forming the bearing outer ring, rollers, and cage into the bearing outer assembly. However, this type of bearing presents certain difficulties during maintenance, especially when removing the rollers. Current technology typically involves manual hammering or manually clamping the rollers with simple tools for disassembly, which is not only inefficient but also prone to damaging the bearing outer assembly, affecting its service life and accuracy. Furthermore, due to the tight fit between the rollers, cage, and outer ring, uneven force distribution during disassembly can easily lead to localized deformation or even breakage of the cage, increasing maintenance costs and time. Utility Model Content

[0003] The purpose of this invention is to overcome the defects of the prior art and provide a roller removal device for cylindrical roller bearings, which can ensure that no additional damage to bearing components is caused during the roller removal process.

[0004] The purpose of this utility model is achieved as follows: a roller unloading device for a cylindrical roller bearing box, comprising a device base, an outer ring clamping mechanism, a roller clamping mechanism, and a pry bar mechanism; wherein,

[0005] The device base comprises a device base plate, a device end plate connected to one end of the device base plate, and a device top plate connected to the top surface of the device end plate, forming a U-shape; two blind holes are opened one in front of the other on the top surface of the device base plate along the center line in the length direction.

[0006] The outer ring clamping mechanism includes a bottom support mechanism and a top limiting mechanism;

[0007] The bottom support mechanism includes two Ω-shaped support seats that are horizontally fixed to the top surface of the device base plate of the device base, one in front of the other, and a pair of outer ring support wheels that are longitudinally connected between the top surfaces of the two support seats. Each of the top plates of the two support seats has a guide through hole that is coaxial with two blind holes on the device base plate, and the diameter of the through hole is smaller than the diameter of the blind hole.

[0008] The top limiting mechanism includes a locking cylinder mounted on the top surface of the device top plate of the device base and located directly above the central axis of the two support seats, and an outer ring pressure block connected to the piston rod of the locking cylinder and located below the device top plate.

[0009] The roller clamping mechanism includes a clamping frame and two clamping screws. The clamping frame is longitudinally positioned between the middle and upper parts of the two support seats. The clamping frame includes an L-shaped clamping base composed of a horizontal part and a vertical part, a side rocker arm with its lower end hinged to the front end of the horizontal part of the clamping base, and an upper rocker arm with its rear end hinged to the upper end of the vertical part of the clamping base. The front end of the upper rocker arm is snapped to the top of the side rocker arm. The two clamping screws are installed one-to-one and opposite to each other on the upper part of the vertical part of the clamping base and the upper part of the side rocker arm.

[0010] The pry bar mechanism includes a pry bar support, a pry bar, and two guide rods. The pry bar support is fixed on the top surface of the device base plate away from the device end plate and located between two support seats in the bottom support mechanism. The front end of the pry bar is hinged to the middle of the bottom surface of the horizontal part of the clamping base, and the front part of the pry bar rests on the pry bar support. The bottoms of the two guide rods are inserted into two blind holes on the device base plate, and the two guide rods are slidably inserted into the guide through holes on the two support seats of the bottom support mechanism and then fixed to the bottom surfaces at both ends of the horizontal part of the clamping base.

[0011] In the aforementioned roller removal device for cylindrical roller bearing housing, a groove is provided in the middle of the top plate of the support seat, so that the height of the two ends of the top plate is higher than the height of the middle of the top plate.

[0012] In the aforementioned cylindrical roller bearing roller removal device, the two outer ring support wheels are connected between the two top surfaces of the two support seats by a pair of wheel frames; the outer ring support wheels are nylon rollers, the length of the outer ring support wheels is adapted to the height of the bearing outer ring, and each end of the outer ring support wheel is provided with a flange with a diameter larger than that of the outer ring support wheel.

[0013] In the aforementioned cylindrical roller bearing roller removal device, the bottom of the guide rod is provided with a limiting block whose diameter is adapted to the diameter of the blind hole on the bottom plate of the device.

[0014] In the aforementioned roller removal device for cylindrical roller bearing housings, both the head of the fixed-end clamping screw and the head of the movable-end clamping screw are fitted with nylon sleeves or copper sleeves.

[0015] The roller removal device for the cylindrical roller bearing described above includes a pry bar support comprising a U-shaped base frame longitudinally fixed to the top surface of the base plate and a support shaft spanning the upper parts of the two arms of the base frame; the front part of the pry bar rests on the support shaft.

[0016] The features of the roller unloading device for cylindrical roller bearings of this utility model are:

[0017] 1. The roller removal device of this utility model can fully protect the surface of the roller, cage and bearing outer ring during the roller removal process, and can reliably ensure that no additional bearing component damage occurs during the removal of cylindrical rollers;

[0018] 2. The roller removal device of this utility model is applicable to the roller removal of all medium and large cylindrical roller bearings. Especially for double-row cylindrical roller bearings in rail transit, it can cover all cylindrical roller bearing models with an outer diameter of φ200mm-φ240mm without changing the positioning parts, and has very strong versatility.

[0019] 3. The roller unloading device of this utility model is easy to automate. By simply modifying the outer ring clamping mechanism, the roller clamping mechanism and the pry bar mechanism, such as by adding roller position sensing sensors, servo motors that drive the rotation of the bearing outer components and cylinders that drive the pry bar, the fully automated unloading of the rollers can be achieved, further improving efficiency. Attached Figure Description

[0020] Figure 1 This is a front view of the roller removal device for the cylindrical roller bearing of this utility model;

[0021] Figure 2 This is an isometric view of the roller clamping mechanism in the roller unloading device of the cylindrical roller bearing of this utility model;

[0022] Figure 3 This is an isometric view of the pry bar mechanism in the roller unloading device of this utility model;

[0023] Figure 4 This is an isometric view of the roller unloading device of this utility model in use.

[0024] Figure 5 This is a front view of the roller retraction device of this utility model in use under different conditions. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings.

[0026] Please see Figures 1 to 3 The present invention relates to a roller unloading device for a cylindrical roller bearing housing, comprising a device base 1, an outer ring clamping mechanism, a roller clamping mechanism 3, and a pry bar mechanism 4.

[0027] The device base 1 is U-shaped, consisting of a device base plate 11, a device end plate 12 connected to the right end of the device base plate 11, and a device top plate 13 connected to the top surface of the device end plate 12; two blind holes 14 are opened one in front of the other on the center line of the length direction on the top surface of the device base plate 11.

[0028] The outer ring clamping mechanism includes a bottom support mechanism 2A and a top limiting mechanism 2B.

[0029] The bottom support mechanism 2A includes two support seats 21 and a pair of outer ring support wheels 22. The two support seats 21 are horizontally fixed to the top surface of the device base plate 11 of the device base 1, one in front of the other. The distance between the two support seats 21 is adapted to the height of the outer ring 5c ​​of the bearing. The support seats 21 are Ω-shaped, and a groove is opened in the middle of the top plate of the support seat 21 so that the height of the two ends of the top plate is higher than the height of the middle of the top plate. Each of the top plates of the two support seats 21 has a guide hole that is coaxial with the two blind holes 14 on the device base plate 11. The diameter of the guide hole is smaller than the diameter of the blind hole 14. The pair of outer ring support wheels 22 are longitudinally connected between the top surfaces of the two support seats 21 through a pair of wheel frames 23. The outer ring support wheels 22 are nylon rollers. The length of the outer ring support wheels 22 is adapted to the height of the outer ring 5c ​​of the bearing. Each end of the outer ring support wheel 22 has a flange 220 with a diameter larger than that of the outer ring support wheel 22.

[0030] The top limiting mechanism 2B includes a locking cylinder 24 and an outer ring pressure block 25. The locking cylinder 24 is installed on the top surface of the device top plate 13 of the device base 1 and is located directly above the central axis of the two support seats 21. The outer ring pressure block 25 is connected to the piston rod of the locking cylinder 24 and is located below the device top plate 13. The bottom surface of the outer ring pressure block 25 is inverted V-shaped.

[0031] The roller clamping mechanism 3 includes a clamping frame 3A and two clamping screws 35. The clamping frame 3A is longitudinally positioned between the middle and upper parts of the two support seats 21. The clamping frame 3A includes an L-shaped clamping base 3B composed of a horizontal part 31 and a vertical part 32, a side rocker arm 33 with its lower end hinged to the front end of the horizontal part 31 of the clamping base 3B, and an upper rocker arm 34 with its rear end hinged to the upper end of the vertical part 32 of the clamping base 3B. The bottom surface of the front end of the upper rocker arm 34 is provided with a male stop, and the top surface of the side rocker arm 33 is provided with a female stop that matches the male stop, so that the front end of the upper rocker arm 34 and the top end of the side rocker arm 33 are connected through the male stop and the female stop. The two clamping screws 35 are installed one-to-one and opposite to each other on the upper part of the vertical part 32 of the clamping base 3B and the upper part of the side rocker arm 33. The heads of the two clamping screws 35 are equipped with nylon sleeves or copper sleeves.

[0032] The pry bar mechanism 4 includes a pry bar support, a pry bar 40, and two guide rods 43. The pry bar support is fixed to the top left side of the device base plate 11, away from the device end plate 12, and located between two support seats 21 in the bottom support mechanism 2A. The pry bar support includes a U-shaped base frame 41 longitudinally fixed to the top surface of the base plate 11 and a support shaft 42 spanning the upper parts of the two arms of the base frame 41. The front end of the pry bar 40 is hinged to the middle of the bottom surface of the horizontal part 31 of the clamping base 3C, and prys... The front part of the rod 40 rests on the support shaft 42 of the pry bar support; the bottom of each guide rod 43 is provided with a limiting block 430 whose diameter is adapted to the diameter of the blind hole 14 on the device base plate 11. The limiting blocks 430 at the bottom of the two guide rods 43 are slidably inserted into the two blind holes 14 on the device base plate 11, and the two guide rods 43 are fixed to the bottom surfaces of the horizontal part 31 of the clamping base 3B after being inserted into the guide through holes on the two support seats 21 of the bottom support mechanism 2A.

[0033] Please see again Figures 3 to 5 The roller removal device for cylindrical roller bearings of this utility model includes the following steps during use:

[0034] Step 1: Control the piston rod of the locking cylinder 24 to be in the retracted state, causing the outer ring pressure block 25 to rise. At the same time, raise the rear of the pry bar 40, causing the clamping frame 3A to descend to its lowest position, i.e., the limiting blocks 430 at the bottom of the two guide rods 43 are inserted into the two blind holes 14 on the device base plate 11. Then open the upper rocker arm 34 and the side rocker arm 33 of the clamping frame 3A, and then place the bearing outer assembly 5 upright into the roller unloading device and sit on a pair of outer ring support wheels 22. Since both ends of the two outer ring support wheels 22 have flanges 220, they can axially limit the bearing outer assembly 5 (see...). Figure 4 );

[0035] Step 2: First, activate the piston rod of the locking cylinder 24 to extend, drive the outer ring pressure block 25 to press down the bearing outer assembly 5, so that the outer ring pressure block 25 and a pair of outer ring support wheels 22 together fix the bearing outer assembly 5. Then close the upper rocker arm 34 and the side rocker arm 33, so that the two clamping screws 35 are located at the two ends of a lowest roller 5a.

[0036] Step 3: Rotate one of the clamping screws 35 on the roller clamping mechanism 3 to clamp the lowest roller 5a with the two clamping screws 35. Since the heads of the two clamping screws 35 are equipped with nylon sleeves or copper sleeves, their hardness is much lower than that of the roller 5a, which can avoid damage to the end face of the roller 5a when clamping the roller 5a.

[0037] Step four: First, press down the rear of the pry bar 40 to drive the clamping frame 3A to rise. At this time, the two guide rods 43 cause the clamping frame 3A to rise vertically, preventing the clamping frame 3A from tilting, until the limiting blocks 430 at the bottom of the two guide rods 43 are restricted by the top plate of the support seat 21, preventing the clamping frame 3A from rising further, ensuring that the clamping frame 3A will not hit the outer bearing assembly 5. At this point, the roller 5a clamped by the two clamping screws 35 has been pulled upward by the clamping frame 3A and exited the pocket of the retainer 5b (see...). Figure 5 After loosening one clamping screw 35, remove the withdrawn roller 5a;

[0038] Step 5: First, raise the rear of the pry bar 40 to lower the clamping frame 3A to its lowest position. Then, rotate the cage 5b of the outer bearing assembly 5 to rotate the next roller 5a to its lowest position. Repeat steps 3 and 4 to remove the next roller 5a until all rollers 5a are removed, thus completing the non-destructive separation of rollers 5a from the outer bearing ring 5c ​​and cage 5b.

[0039] The roller removal device for cylindrical roller bearings of this utility model has the following characteristics:

[0040] 1. The outer ring clamping mechanism fixes the bearing outer assembly 5 onto the roller unloading device, and the bottom support mechanism 2A of the outer ring clamping mechanism 2A can axially limit the bearing outer assembly 5, and the top limiting mechanism 2B can radially limit the bearing outer assembly 5.

[0041] 2. The roller clamping mechanism 3 clamps the end face of the roller 5a. The heads of the two clamping screws 35 are equipped with copper sleeves, which generate sufficient friction without scratching the end face of the roller 5a, so as to ensure that the roller 5a is evenly stressed and does not skew or loosen during the unloading process.

[0042] 3. The two guide rods 43 of the pry bar mechanism 4 ensure that the roller 5a is always subjected to a horizontal upward force during the unloading process, which can ensure that the end face of the roller 5a and the cage 5b will not suffer additional damage.

[0043] The above embodiments are for illustrative purposes only and are not intended to limit the present invention. Those skilled in the art can make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also fall within the scope of the present invention and should be defined by the claims.

Claims

1. A roller removal device for a cylindrical roller bearing, comprising a device base, an outer ring clamping mechanism, a roller clamping mechanism, and a pry bar mechanism; characterized in that, The device base comprises a device base plate, a device end plate connected to one end of the device base plate, and a device top plate connected to the top surface of the device end plate, forming a U-shape; two blind holes are opened one in front of the other on the top surface of the device base plate along the center line in the length direction. The outer ring clamping mechanism includes a bottom support mechanism and a top limiting mechanism; The bottom support mechanism includes two Ω-shaped support seats that are horizontally fixed to the top surface of the device base plate of the device base, one in front of the other, and a pair of outer ring support wheels that are longitudinally connected between the top surfaces of the two support seats. Each of the top plates of the two support seats has a guide through hole that is coaxial with two blind holes on the device base plate, and the diameter of the through hole is smaller than the diameter of the blind hole. The top limiting mechanism includes a locking cylinder mounted on the top surface of the device top plate of the device base and located directly above the central axis of the two support seats, and an outer ring pressure block connected to the piston rod of the locking cylinder and located below the device top plate. The roller clamping mechanism includes a clamping frame and two clamping screws. The clamping frame is longitudinally positioned between the middle and upper parts of the two support seats. The clamping frame includes an L-shaped clamping base composed of a horizontal part and a vertical part, a side rocker arm with its lower end hinged to the front end of the horizontal part of the clamping base, and an upper rocker arm with its rear end hinged to the upper end of the vertical part of the clamping base. The front end of the upper rocker arm is snapped to the top of the side rocker arm. The two clamping screws are installed one-to-one and opposite to each other on the upper part of the vertical part of the clamping base and the upper part of the side rocker arm. The pry bar mechanism includes a pry bar support, a pry bar, and two guide rods. The pry bar support is fixed on the top surface of the device base plate away from the device end plate and located between two support seats in the bottom support mechanism. The front end of the pry bar is hinged to the middle of the bottom surface of the horizontal part of the clamping base, and the front part of the pry bar rests on the pry bar support. The bottoms of the two guide rods are inserted into two blind holes on the device base plate, and the two guide rods are slidably inserted into the guide through holes on the two support seats of the bottom support mechanism and then fixed to the bottom surfaces at both ends of the horizontal part of the clamping base.

2. The roller removal device for a cylindrical roller bearing according to claim 1, characterized in that, A groove is provided in the middle of the top plate of the support base, so that the height of the two ends of the top plate is higher than the height of the middle of the top plate.

3. The roller removal device for a cylindrical roller bearing according to claim 1, characterized in that, Both outer ring support wheels are connected between the top surfaces of the two support seats by a pair of wheel frames; the outer ring support wheels are nylon rollers, the length of the outer ring support wheels is adapted to the height of the bearing outer ring, and each end of the outer ring support wheel is provided with a flange with a diameter larger than that of the outer ring support wheel.

4. The roller removal device for a cylindrical roller bearing according to claim 1, characterized in that, The bottom of the guide rod is provided with a limiting block whose diameter matches the diameter of the blind hole on the bottom plate of the device.

5. The roller removal device for a cylindrical roller bearing according to claim 1, characterized in that, The heads of both the fixed-end clamping screw and the movable-end clamping screw are fitted with nylon sleeves or copper sleeves.

6. The roller removal device for a cylindrical roller bearing according to claim 1, characterized in that, The pry bar support includes a U-shaped base frame that is longitudinally fixed to the top surface of the base plate and a support shaft that spans between the upper parts of the two arms of the base frame; the front part of the pry bar rests on the support shaft.

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