A disassembly device for railway freight car bearing sealing cover

Abstract

The present invention discloses a disassembly device for a bearing sealing cover of a railway freight car, comprising a frame, a cylinder, a disassembly mechanism and a bearing positioning block. The cylinder is fixed at the center of the top surface of the mounting plate of the frame; the disassembly mechanism comprises a connecting rod, a connecting seat, a backrest and two pry bars; the connecting rod is connected to the lower end of the piston rod of the cylinder; the connecting seat is fixed to the lower end of the connecting rod and comprises a top plate and front and rear walls, and a pin is spanned at the lower center of the front and rear walls; the backrest spans between the middle of the bottom surface of the front and rear walls of the connecting seat; the heads of the two pry bars are mounted on the pin, and when the two pry bars are in a horizontal state, the lateral distance between their tail ends is adapted to the inner diameter of the middle section of the sealing cover, and when the two pry bars are in a free hanging state and are separated by the backrest and arranged in an eight-shaped shape, the lateral distance between their tail ends is greater than the inner diameter of the inner ring of the bearing and smaller than the inner diameter of the inner sealing ring; the bearing positioning block is fixed to the bottom plate of the frame. The present invention can realize semi-automatic operation.

Description

Technical Field

[0001] The invention relates to a disassembly device for a bearing sealing cover of a railway freight car. Background Art

[0002] Railway freight car bearings are double-row tapered roller bearings. The inner ring raceway adopts a full arc convexity design. The large inner ring rib adopts an inclined rib and a rubber labyrinth seal. Railway freight car bearings need to have their seal covers removed during general repairs or overhauls. At present, the seal covers of railway freight car bearings are removed purely by manpower using a pry bar. Since the distance between the fulcrum and the pry point of the pry bar is too short, and the working space of the pry bar is narrow, the operation is very inconvenient; and the surface of the product to be repaired is covered with oil stains. During the actual operation, the pry bar often slips, which is very dangerous. Once the operator is not careful, his hands or even his face will be easily injured, posing a great safety hazard; since the seal cover is tightly combined with the bearing, it is very difficult to remove it by manpower alone. In summary, the following are the main problems with removing the seal cover:

[0003] ① The operating space of the pry bar is narrow, which makes it very inconvenient to remove;

[0004] ② The product surface is oily and the crowbar can easily slip during manual operation, which poses a great safety hazard;

[0005] ③ If the manual operation pry bar slips, it may also scratch the inner diameter surface of the product and other parts, causing secondary damage to the product;

[0006] ④ The sealing cover is tightly combined with the bearing. Removing it by manpower alone will result in high labor intensity and low production efficiency. Summary of the invention

[0007] The purpose of the present invention is to overcome the defects of the prior art and provide a disassembly device for a railway freight car bearing sealing cover, which can realize semi-automatic operation, effectively reduce the labor intensity of workers, and greatly improve production efficiency.

[0008] The object of the present invention is achieved as follows: a disassembly device for a railway freight car bearing sealing cover is used to pull out a sealing cover having a sealing ring installation section, an intermediate section and a bearing installation section connected in sequence; the sealing ring installation section is installed with an inner sealing ring and an outer sealing ring, and the bearing installation section is inserted into a thread opening on the inner circumferential surface of the bearing outer ring; the disassembly device comprises a frame, a cylinder, a disassembly mechanism and a bearing positioning block; wherein,

[0009] The frame includes four support columns whose lower ends are fixed to the work surface, a bottom plate fixed to the lower parts of the four support columns, and a mounting plate fixed to the top surfaces of the four support columns;

[0010] The cylinder is fixed to the center of the top surface of the mounting plate of the frame, and the piston rod of the cylinder is inserted into the central through hole of the mounting plate;

[0011] The disassembly mechanism comprises a connecting rod, a connecting seat, a backrest and two pry bars; the upper end of the connecting rod is connected to the lower end of the piston rod of the cylinder; the connecting seat comprises a top plate, a front wall connected to the front of the bottom of the top plate and a rear wall connected to the rear of the bottom surface of the top plate and parallel to the front wall, a pin is bridged by the lower center of the front wall and the lower center of the rear wall, a threaded blind hole is respectively provided at the bottom center of the front wall and the bottom center of the rear wall, and the top center of the connecting seat is fixed to the lower end of the connecting rod; the backrest is a cuboid with a rectangular cross-section, and the backrest is longitudinally bridged between the middle part of the bottom surface of the front wall and the middle part of the bottom surface of the rear wall of the connecting seat by two bolts; the thickness of the head of the pry bar is greater than the thickness of the tail, the bottom surface of the pry bar is a plane, and the top surface of the pry bar is a first plane, a first inclined plane, a second plane, a second inclined plane and a third plane from head to tail, the first plane corresponds to the head section of the pry bar, the first inclined plane corresponds to the head section of the pry bar, and the second inclined plane corresponds to the head section of the pry bar. The second plane, the second inclined plane and the third plane correspond to the tail section of the pry bar, and the length of the tail section is adapted to the thickness of the outer sealing ring in the sealing cover, and the thickness of the tail end of the pry bar corresponding to the third plane is adapted to the distance between the end face of the inner ring of the bearing and the bottom face of the outer sealing ring; one of the pry bars is fixed with a piece of iron plate with a thickness on the bottom face corresponding to the first inclined plane to the second inclined plane; the heads of the two pry bars each extend a pivoting portion with a pin hole, so that the two pry bars are rotatably mounted on the pin shaft through the pin hole, when the two pry bars are in a horizontal state, the lateral distance between the tail ends of the two pry bars is adapted to the inner diameter of the middle section of the sealing cover, and when the two pry bars are in a free hanging state, they each lean against the two side faces of the backer and are arranged in an eight-shaped shape, and at this time, the lateral distance between the tail ends of the two pry bars is greater than the inner diameter of the inner ring of the bearing and smaller than the inner diameter of the inner sealing ring installed in the sealing cover;

[0012] The bearing positioning block is a rectangular plate with a V-shaped groove in the middle of a long side surface, and two longitudinal waist-shaped holes are respectively opened on the surface close to the two short sides. The bearing positioning block is fixed to the bottom plate of the frame by two pairs of bolts with the V-shaped groove facing forward.

[0013] In the above-mentioned disassembly device for the bearing sealing cover of a railway freight car, the thickness of the iron plate is 2 mm.

[0014] In the above-mentioned disassembly device for the bearing sealing cover of a railway freight car, bolt washers are respectively provided on the corresponding threaded blind holes on the bottom surface of the front wall of the connecting seat and the corresponding threaded blind holes on the bottom surface of the rear wall, so that the lateral distance between the tail ends of the two pry bars is reduced.

[0015] In the above-mentioned disassembly device for the bearing sealing cover of a railway freight car, a rubber baffle with a diameter matching the outer diameter of the bearing is also installed on the connecting rod.

[0016] Compared with the prior art, the disassembly device for the bearing seal cover of a railway freight car of the present invention has the following characteristics:

[0017] ① The operating space of the pry bar in the prior art is narrow, which makes it very inconvenient to dismantle. The dismantling device of the present invention is simple to operate and easy to use. You only need to put the bearing on the bearing positioning block and press the cylinder switch to complete the dismantling work;

[0018] ② In the original manual operation, due to the oil on the product surface, the crowbar is easy to slip, which poses a great safety hazard. The disassembly device of the present invention is accurately positioned and does not slip, which effectively eliminates this safety hazard and ensures the personal safety of workers to a great extent;

[0019] ③ The original manual operation of the pry bar may also scratch the inner diameter surface of the bearing and other parts after slipping, causing secondary damage to the bearing. The disassembly device of the present invention can accurately locate and complete the disassembly action in one time, significantly reducing the secondary damage to the product;

[0020] ④ The sealing cover is tightly combined with the bearing. If it is dismantled by manpower alone, the labor intensity is high and the production efficiency is low. The disassembly device of the present invention uses machinery to replace manpower, which reduces the labor intensity of workers and greatly improves the production efficiency;

[0021] ⑤ The disassembly device of the present invention has a wide range of applications and can be used for general repair and overhaul processes and assembly inspection of 352226X2-2RZ railway bearings;

[0022] ⑥ The disassembly device of the present invention has a compact structure, ingenious design, a positioning device, and can achieve semi-automatic operation, laying a solid foundation for the construction of future automated production lines. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is an axial cross-sectional view of a railway freight car bearing of the present invention;

[0024] Figure 1a yes Figure 1 An enlarged view of the P site in FIG.

[0025] Figure 2 It is a front view of a disassembly device for a railway freight car bearing sealing cover of the present invention;

[0026] Figure 2a yes Figure 2 AA view in the figure;

[0027] Figure 2b is a three-dimensional diagram of a disassembly mechanism in the disassembly device of the present invention;

[0028] Figure 2c It is a schematic structural diagram of a pry bar in a disassembly device of the present invention;

[0029] Figure 3 This is a state diagram of the disassembly device of the railway freight car bearing sealing cover of the present invention when performing step 1 in use;

[0030] Figure 4 This is a state diagram of the disassembly device of the railway freight car bearing sealing cover of the present invention when performing step 2 in use;

[0031] Figure 5 This is a state diagram of the railway freight car bearing sealing cover disassembly device of the present invention when performing step three in use;

[0032] Figure 6 It is a state diagram of the disassembly device of the railway freight car bearing sealing cover of the present invention when performing step four when in use. DETAILED DESCRIPTION

[0033] The present invention will be further described below in conjunction with the accompanying drawings.

[0034] See also Figure 1 to Figure 2c The disassembly device of the railway freight car bearing sealing cover of the present invention is used to pull out the sealing cover 10 having the sealing ring installation section 11, the middle section 12 and the bearing installation section 12 connected in sequence, the sealing ring installation section 11 is installed with the inner sealing ring 14 and the outer sealing ring 15, and the bearing installation section 13 is inserted into the thread opening on the inner circumferential surface of the bearing outer ring 22; the height of the middle section 12 is 8.5mm.

[0035] The disassembly device of the railway freight car bearing sealing cover of the present invention comprises a frame 3, a cylinder 4, a disassembly mechanism and a bearing positioning block 6.

[0036] The frame 3 includes four support columns 31, a bottom plate 32 fixed to the bottom of the four support columns, and a mounting plate 33 fixed to the top surface of the four support columns 31, and a through hole is formed in the center of the mounting plate 33;

[0037] The cylinder 4 is mounted at the center of the top surface of the mounting plate 33 of the frame 3, and the piston rod of the cylinder 4 is inserted into the through hole of the mounting plate 33;

[0038] The disassembly mechanism includes a connecting rod 51, a connecting seat 52, a backrest 53, two pry bars 54 and a rubber baffle 55; wherein,

[0039] The upper end of the connecting rod 51 is connected to the lower end of the piston rod of the cylinder 4;

[0040] The connecting seat 52 includes a top plate, a front wall connected to the front of the bottom of the top plate, and a rear wall connected to the rear of the bottom of the top plate and parallel to the front wall. A pin 520 is connected across the lower center of the front wall and the lower center of the rear wall. A threaded blind hole is respectively provided at the bottom center of the front wall and the bottom center of the rear wall. The top center of the connecting seat 52 is fixed to the lower end of the connecting rod 51.

[0041] The backrest 53 is a cuboid with a rectangular cross section and a bolt hole is provided at each end. The backrest 53 is installed at the middle of the bottom surface of the front wall and the middle of the bottom surface of the rear wall of the connecting seat 52 by two bolts, so that the backrest 53 is longitudinally connected between the middle of the bottom surface of the front wall and the middle of the bottom surface of the rear wall of the connecting seat 52;

[0042] The thickness of the head of the pry bar 54 is greater than that of the tail. The bottom surface of the pry bar 54 is a plane. The top surface of the pry bar 54 is a first plane 541, a first inclined surface 542, a second plane 543, a second inclined surface 544 and a third plane 545 from the head to the tail. The first plane 541 corresponds to the head section of the pry bar 54, the first inclined surface 542 corresponds to the middle section of the pry bar 54, the second plane 543, the second inclined surface 544 and the third plane 545 correspond to the pry bar 54. The tail section of the tail section is adapted to the thickness of the outer sealing ring 15 in the sealing cover 10, and the thickness of the tail of the pry bar 54 corresponding to the third plane 545 is adapted to the distance between the end surface of the bearing inner ring 22 and the bottom surface of the outer sealing ring 15 in the sealing cover 10. One of the pry bars 54 is fixed with an iron plate 540 with a thickness of 2 mm on the bottom surface corresponding to the first inclined surface 542 to the second inclined surface 543; the heads of the two pry bars 54 each extend a pivoting portion with a pin hole 546, so that the two pry bars 54 are rotatably mounted on the pin shaft 520 through the pin hole 546. When the two pry bars 54 are in a horizontal state, the lateral distance between the tail ends of the two pry bars 54 is the same as the distance between the end faces of the inner ring 22 of the bearing and the bottom surface of the outer sealing ring 15 in the sealing cover 10. The inner diameter of the middle section 12 of the cover 10 is adapted. When the two pry bars 54 are in a freely hanging state, they are respectively against the two side surfaces of the backing 53 and are arranged in an eight-shaped shape with an angle less than 180° and greater than 90°. At this time, the lateral distance between the tail ends of the two pry bars 54 is greater than the inner diameter of the bearing inner ring 21 and smaller than the inner diameter of the inner sealing ring 14 installed in the sealing cover 10; by respectively arranging bolt washers on the corresponding threaded blind holes on the bottom surface of the front wall of the connecting seat 52 and the corresponding threaded blind holes on the bottom surface of the rear wall, the angle between the two pry bars 54 is reduced, that is, the lateral distance between the tail ends of the two pry bars 54 is reduced; and by preparing a plurality of backings 53 of different widths, it is also possible to adapt to bearings 20 of different specifications.

[0043] The rubber baffle 55 is a circular plate with a diameter greater than the outer diameter of the bearing outer ring 22 , and the rubber baffle 55 is fixed to the lower part of the piston rod of the cylinder 4 .

[0044] The bearing positioning block 6 is a rectangular plate with a V-shaped groove with an angle of 110° on one long side. The bearing positioning block 6 has two longitudinal waist-shaped holes on the surface close to the two short sides. The bearing positioning block 6 is fixed to the bottom plate 32 of the frame 3 by two pairs of bolts 60 with its V-shaped groove facing forward, so that the longitudinal position of the bearing positioning block 6 can be adjusted.

[0045] See also Figures 3 to 6 The disassembly device of the railway freight car bearing sealing cover of the present invention comprises the following steps when in use:

[0046] Step 1: The operator first pushes the bearing 20 to be removed into the V-shaped groove of the bearing positioning block 6 fixed on the bottom plate 32 of the frame 3 with the sealing cover 10 facing upward, and adjusts the longitudinal position of the bearing positioning block 6 so that the plane center of the bearing 20 is coaxial with the piston rod of the cylinder 4 to complete the positioning of the bearing 20 (see Figure 3 );

[0047] Step 2: Turn on the switch of the cylinder 4, and the cylinder 4 drives the disassembly mechanism to move downward in a freely hanging state. The two pry bars 54 are in a freely hanging state and are formed by the backing 53 at an angle of 105° to enter the sealing ring 10 (see Figure 4 ) until the bottom surfaces of the tail ends of the two pry bars 54 are blocked by the end surface of the bearing inner ring 21;

[0048] Step 3: Under the premise that the piston rod of the cylinder 4 continues to extend downward, the tail sections of the two pry bars 54 enter the space between the bottom surface of the outer sealing ring 15 in the sealing cover 10 and the end surface of the bearing inner ring 21 by means of the second inclined surface 544, so that the two pry bars 54 gradually reach a horizontal state (see Figure 5 );

[0049] Step 4: The piston rod of the cylinder 4 continues to extend downward to the limit position, so that the angle between the two pry bars 54 is greater than 180°, and the sealing cover 10 is pried away from the teeth of the bearing outer ring 22 with the intersection of the end face and the inner diameter surface of the bearing inner ring 21 as the fulcrum C and D (see Figure 6 ), the rubber baffle 55 blocks the sealing cover 10 which loses its restraining force and pops up upward, causing the sealing cover 10 to lose its elasticity.

[0050] In order to avoid the potential safety hazard caused by the sealing cover 10 suddenly losing its restraining force and bouncing up due to the excessive force of the cylinder 4 when the sealing cover 10 is pried off the bearing 2 by two pry bars 54 at the same time, an iron plate 540 with a thickness of 2 mm is fixed to the bottom surface of one pry bar 54, so that the fulcrum C of the pry bar 54 is higher than the fulcrum D of the other pry bar 54, so that the two sides of the sealing cover 10 can be pried off the bearing 20 in sequence, that is, the pry bar 54 with the iron plate 540 first pries one side of the sealing cover 10 off the tooth edge of the bearing outer ring 22, and the other pry bar 54 then pries the other side of the sealing cover 10 off the tooth edge of the bearing outer ring 22, and finally the bottom surface of the sealing cover 10 is higher than the end surface of the bearing outer ring 22, thereby completing the disassembly of the sealing cover 10.

[0051] The above embodiments are only used to illustrate the present invention, rather than to limit the present invention. Those skilled in the relevant technical field may make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also belong to the scope of the present invention and should be defined by the claims.

Claims

1. A disassembly device for a railway freight car bearing seal cover, used for pulling out a seal cover having a seal ring installation section, an intermediate section and a bearing installation section connected in sequence; the seal ring installation section is installed with an inner seal ring and an outer seal ring, and the bearing installation section is inserted into a thread opening on the inner circumferential surface of the bearing outer ring; the disassembly device comprises a frame, a cylinder, a disassembly mechanism and a bearing positioning block; characterized in that, The frame includes four support columns whose lower ends are fixed to the work surface, a bottom plate fixed to the lower parts of the four support columns, and a mounting plate fixed to the top surfaces of the four support columns; The cylinder is fixed to the center of the top surface of the mounting plate of the frame, and the piston rod of the cylinder is inserted into the central through hole of the mounting plate; The disassembly mechanism includes a connecting rod, a connecting seat, a backrest and two pry bars; the upper end of the connecting rod is connected to the lower end of the piston rod of the cylinder, and a rubber baffle with a diameter adapted to the outer diameter of the bearing is also installed on the connecting rod; the connecting seat includes a top plate, a front wall connected to the front of the bottom of the top plate, and a rear wall connected to the rear of the bottom of the top plate and parallel to the front wall, a pin is connected across the lower center of the front wall and the lower center of the rear wall, a threaded blind hole is respectively provided at the bottom center of the front wall and the bottom center of the rear wall, and the top center of the connecting seat is fixed to the lower end of the connecting rod; the backrest is a cuboid with a rectangular cross-section, which is connected to the bottom of the top plate by Two bolts are longitudinally connected between the middle of the bottom surface of the front wall and the middle of the bottom surface of the rear wall of the connecting seat; the thickness of the head of the pry bar is greater than the thickness of the tail, the bottom surface of the pry bar is a plane, and the top surface of the pry bar is a first plane, a first inclined plane, a second plane, a second inclined plane and a third plane from the head to the tail, the first plane corresponds to the head section of the pry bar, the first inclined plane corresponds to the middle section of the pry bar, the second plane, the second inclined plane and the third plane all correspond to the tail section of the pry bar, the length of the tail section is adapted to the thickness of the outer sealing ring in the sealing cover, and the thickness of the tail end of the pry bar corresponding to the third plane is adapted to the distance between the end surface of the inner ring of the bearing and the bottom surface of the outer sealing ring; One of the pry bars is fixed with an iron plate on the bottom surface corresponding to the first inclined surface to the second inclined surface; the heads of the two pry bars each extend a pivoting portion with a pin hole, so that the two pry bars are rotatably mounted on the pin shaft through the pin hole, and when the two pry bars are in a horizontal state, the lateral distance between the tail ends of the two pry bars is adapted to the inner diameter of the middle section of the sealing cover, and when the two pry bars are in a freely hanging state, they are respectively leaning against the two side surfaces of the backer and arranged in an eight-shaped shape, and at this time, the lateral distance between the tail ends of the two pry bars is greater than the inner diameter of the inner ring of the bearing and smaller than the inner diameter of the inner sealing ring installed in the sealing cover; bolt washers are respectively provided on the corresponding threaded blind holes on the bottom surface of the front wall of the connecting seat and the corresponding threaded blind holes on the bottom surface of the rear wall, so that the lateral distance between the tail ends of the two pry bars is reduced; The bearing positioning block is a rectangular plate with a V-shaped groove in the middle of a long side surface, and two longitudinal waist-shaped holes are respectively opened on the surface close to the two short sides. The bearing positioning block is fixed to the bottom plate of the frame by two pairs of bolts with the V-shaped groove facing forward.

2. The disassembly device for the bearing seal cover of a railway freight car according to claim 1, characterized in that: The thickness of the iron plate is 2 mm.

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