Bearing dismounting and shaft end portion supporting apparatus

Abstract

The utility model discloses a bearing dismounting and mounting axle end part supporting equipment, including including cylinder and with the screw rod of thread engagement connection of cylinder upper end, the screw rod top is provided with screw cross mouth and lower end smooth, the screw rod upside is provided with the handle, the cylinder top is provided with the holding cylinder with antiskid groove, the cylinder downside is provided with three groups of the extension of downward extension, the extension inboard is provided with the support mechanism. Compared with prior art, the utility model has the beneficial effects that: through the support mechanism downward movement, make the support frame gradually stretch to the outside, and gradually make the long side acute angle B of relatively slender move to the bearing inner ring bottom and gradually extrude along the gap between the inner ring and the bearing seat, after fixing the position of support frame, with the continuous rotation of screw rod, the bearing needing to be dismounted is efficiently pulled out.

Description

Technical Field

[0001] This utility model relates to the field of mechanical equipment technology, and in particular to a bearing assembly and disassembly shaft end support device. Background Technology

[0002] Bearings are widely used in various types of machinery. By supporting and positioning the shaft, they reduce friction and energy consumption during shaft rotation. However, after a period of use, the rolling friction coefficient of the bearing increases due to the long-term rolling of the steel balls inside the bearing under load. This necessitates the disassembly and replacement of the bearing. When disassembling and assembling bearings in semi-enclosed bearing housings, conventional pull-type disassembly tools are difficult to remove damaged bearings. The bent part at the end of the pull claw is difficult to grasp the effective position of the bearing to be disassembled, resulting in a slow disassembly and assembly process and low efficiency. Utility Model Content

[0003] The purpose of this utility model is to provide a bearing disassembly and assembly shaft end support device to overcome the shortcomings of the prior art mentioned in the background art. After the support mechanism moves downward, the support frame gradually extends outward and gradually moves the relatively slender long side acute angle B to the bottom of the bearing inner ring and gradually squeezes along the gap between the inner ring and the bearing seat. After the position of the support frame is fixed, the bearing to be disassembled and assembled is efficiently pulled out as the screw rotates continuously.

[0004] To achieve the above objectives, this utility model provides the following technical solution: It includes a cylindrical body and a screw threadedly connected to the upper end of the cylindrical body. The screw has a cross-shaped screw head at its top and a smooth lower end. A handle is provided on the upper side of the screw. A grip sleeve with anti-slip grooves is provided at the top of the cylindrical body. Three sets of downward-extending extensions are provided on the lower side of the cylindrical body. A support mechanism is provided inside each extension. A sliding groove I is provided on the side edge of each extension, and a sliding groove II is provided through the middle of each extension. The support mechanism includes a triangular support frame located between adjacent extensions, a sleeve and a limiting member sleeved on the lower end of the screw. The sleeve is inverted frustum shape, and the lower part of the sleeve has an annular groove. The acute angle A of the short side of the support frame is located in the groove, and the acute angle B of the long side of the support frame is horizontal to the lower side of the extension. The front and rear side walls of the support frame are in contact with the side walls of the extension. A retaining pin is provided at the middle of the top of the support frame and engages in the sliding groove I.

[0005] Preferably, the lower end of the screw has a protrusion for supporting the sleeve and the limiting member, and the screw has an annular groove at the limiting member location.

[0006] Preferably, the limiting member includes a limiting ring and three sets of insert shafts distributed at the same angle within the limiting ring. The left part of the insert shaft is a columnar body that extends inward through the limiting ring into the slot. The right part of the insert shaft is a strip-shaped body with serrated front and rear sidewalls. The lower right end of the insert shaft has an inclined surface, or both the lower right end and the upper right end of the insert shaft have inclined surfaces. A spring is provided on the outer side of the columnar body of the insert shaft to elastically support the insert shaft outward.

[0007] Preferably, the right end of the insert shaft extends into the slide groove II, and the side wall of the slide groove II located outside the insert shaft is provided with engagement patterns for engaging with the serrated side wall of the insert shaft.

[0008] Preferably, an adjusting ring is provided on the outer side of the cylinder at the meshing groove position. The adjusting ring is provided with three sets of L-shaped engaging pieces that engage with the right end of the insert shaft. The vertical wall of the L-shaped engaging piece contacts the right side wall of the insert shaft, and the horizontal wall of the L-shaped engaging piece contacts the upper side wall of the insert shaft. A triangular pressing block is provided on the lower side of the engaging piece, and the inclined surface of the pressing block cooperates with the inclined surface of the lower right end of the insert shaft. The distance between the lower end face of the engaging piece and the pressing block is the height of one insert shaft.

[0009] Preferably, a fixing plug is engaged at the bottom of the slide groove I, and the outer wall of the fixing plug is attached to the inclined surface of the support frame.

[0010] Compared with the prior art, the beneficial effects of this utility model are: 1. By having the acute angle A of the short side of the support frame located within the groove, the support frame can remain within the groove range when rotating around the pivot, and this facilitates the vertical restriction and fixation of the acute angle A of the short side of the support frame after rotation.

[0011] 2. The sliding groove II on the outside of the insert shaft has a meshing pattern that engages with the sawtooth sidewall of the insert shaft. After the insert shaft is elastically supported and moved outward by the spring, it is fixed by engaging with the meshing pattern, thus fixing the current height of the limiting ring.

[0012] 3. By using the distance between the lower end face of the locking piece and the extrusion block as the height of one insertion shaft, the insertion shaft can be properly locked between the locking piece and the extrusion block after moving outward. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0014] Figure 2 This is a schematic diagram of the internal structure of the cylindrical body of this utility model.

[0015] Figure 3 This is a partially enlarged structural diagram of the lower end of the cylinder of this utility model.

[0016] Figure 4 This is a schematic cross-sectional view of the cylindrical body of this utility model.

[0017] Figure 5 This is an exploded structural diagram of the support mechanism of this utility model.

[0018] Figure 6 This is an exploded enlarged structural diagram of the support mechanism of this utility model.

[0019] Figure 7 This is a front view structural diagram of the support mechanism of this utility model.

[0020] Figure 8 This is a schematic cross-sectional view of the limiting ring structure of this utility model.

[0021] Figure 9 This is a cross-sectional view of the extension of this utility model.

[0022] Figure 10 This is a schematic diagram of the adjusting ring structure of this utility model.

[0023] Figure 11 This is a schematic diagram of the working structure of this utility model.

[0024] In the diagram: 1. Cylinder, 2. Screw, 21. Sleeve, 211. Groove, 22. Limiting component, 221. Limiting ring, 222. Insert shaft, 223. Spring, 23. Slot, 3. Handle, 4. Grip cylinder, 5. Extension, 51. Slide groove I, 511. Fixing plug, 52. Slide groove II, 521. Engaging thread, 6. Support mechanism, 61. Support frame, 611. Slot shaft, 7. Adjusting ring, 71. Engaging piece, 72. Extrusion block. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] See appendix Figure 1 To be continued Figure 11 This bearing assembly and disassembly shaft end support device includes a cylindrical body 1 and a screw 2 threadedly connected to the upper end of the cylindrical body 1. The screw 2 has a screw cross-shaped opening at its top and a smooth lower end. A handle 3 is provided on the upper side of the screw 2. A grip cylinder 4 with anti-slip grooves is provided at the top of the cylindrical body 1. Three sets of downwardly extending portions 5 are provided on the lower side of the cylindrical body 1. A support mechanism 6 is provided inside the extension portion 5. A sliding groove I 51 is provided on the side edge of the extension portion 5, and a sliding groove II 52 is provided through the middle of the extension portion 5. The support mechanism 6 includes a triangular support frame 61 located between adjacent extensions 5, a sleeve 21 sleeved on the lower end of the screw 2, and a limiting member 22. The sleeve 21 is inverted frustum shape, and the lower part of the sleeve 21 has an annular groove 211. The acute angle A of the short side of the support frame 61 is located in the groove 211, so that when the support frame 61 rotates with the locking shaft 611 as the fulcrum, the acute angle A of the short side of the support frame 61 can always be kept within the range of the groove 211, and it is convenient to limit and fix the acute angle A of the short side of the support frame 61 after rotation. The acute angle B of the long side of the support frame 61 is horizontal with the lower side of the extension 5. The front and rear side walls of the support frame 61 are in contact with the side walls of the extension 5. The top center of the support frame 61 is provided with a locking shaft 611 that is engaged in the sliding groove I 51.

[0027] The lower end of the screw 2 has a protrusion for supporting the sleeve 21 and the limiting member 22, and the screw 2 has an annular groove 23 at the part of the limiting member 22.

[0028] The limiting member 22 includes a limiting ring 221 and three sets of insert shafts 222 distributed at the same angle within the limiting ring 221. The left part of the insert shaft 222 is a columnar body that extends inward through the limiting ring 221 into the slot 23. The right part of the insert shaft 222 is a strip-shaped body with serrated front and rear sidewalls. The lower right end of the insert shaft 222 has an inclined surface, or both the lower right end and the upper right end of the insert shaft 222 have an inclined surface. A spring 223 is provided on the outer side of the columnar body of the insert shaft 222 to elastically support the insert shaft 222 outward.

[0029] The right end of the insert shaft 222 extends into the slide groove II 52. The side wall of the slide groove II 52 located outside the insert shaft 222 is provided with engagement grooves 521 for engaging with the serrated side wall of the insert shaft 222. After the insert shaft 222 is elastically supported and moved outward by the spring 223, it is fixed by engaging with the engagement grooves 521, thereby fixing the current height of the limiting ring 221.

[0030] An adjusting ring 7 is provided on the outer side of the cylinder 1 at the meshing groove 521 position. Three sets of L-shaped engaging pieces 71 are provided on the adjusting ring 7, which engage with the right end of the insertion shaft 222. The vertical wall of the L-shaped engaging piece 71 contacts the right side wall of the insertion shaft 222, and the horizontal wall of the L-shaped engaging piece 71 contacts the upper side wall of the insertion shaft 222. A triangular pressing block 72 is provided on the lower side of the engaging piece 71, and the inclined surface of the pressing block 72 cooperates with the inclined surface of the lower right end of the insertion shaft 222. The distance between the lower end face of the engaging piece 71 and the pressing block 72 is the height of one insertion shaft 222, so that after the insertion shaft 222 moves outward, it can be properly engaged between the engaging piece 71 and the pressing block 72.

[0031] A fixing plug 511 is engaged at the bottom of the slide groove I 51, and the outer wall of the fixing plug 511 is attached to the inclined surface of the support frame 61.

[0032] How to use this utility model: When using this utility model, first place the removed bearing housing horizontally on the ground with the bearing to be disassembled facing upwards. Hold the cylinder 4 with one hand and place the extension 5 into the inner ring of the bearing to be disassembled, ensuring the lower end of the extension 5 is close to the bearing housing. With the other hand, turn the handle 3 or use a screwdriver or electric drill to insert into the screw crosshead to rotate the screw rod 2, causing the screw rod 2 to gradually move towards the lower side of the cylinder 1. As the screw rod 2 moves downwards, it causes the sleeve 21 and the limiting member 22 to move downwards synchronously. The insert shaft 222 is supported and pressed against the vertical wall of the engaging piece 71 by the spring 223. At the same time, the adjusting ring 7 also moves downwards synchronously with the sleeve 21 due to its own weight. The sleeve 21 engages with the support frame 61, causing it to move downwards synchronously. The support frame 61 tilts outwards along the top of the fixing plug 511. The relatively slender long acute angle B of the support frame 61 gradually moves to the bottom of the inner ring of the bearing and is pressed along the gap between the inner ring and the bearing housing until the support frame 61... The relatively slender, acute-angled side B completely supports the bottom of the inner ring of the bearing. After stopping the rotation of the screw 2, pull the adjusting ring 7 upward to move the vertical wall of the engaging piece 71 upward until the insert shaft 222 pops outward and engages with the meshing thread 521, fixing the position of the sleeve 21, the limiting piece 22, and the support frame 61. At this time, the left end of the insert shaft 222 disengages from the slot 23. Continue to rotate the screw 2 so that the lower end of the screw 2 continues to move downward. The lower end of the screw 2 gradually moves and presses against the bearing seat, causing the cylinder 1 and the support mechanism 6 to move upward and press the bearing to move upward synchronously, removing it from the bearing seat. Rotate the screw 2 in the opposite direction and pull the adjusting ring 7 upward appropriately to restore the position of the support mechanism 6. After the left end of the insert shaft 222 is restored and inserted into the slot 23, quickly press the adjusting ring 7 downward to make the engaging piece 71 slide and press along the upper right slope of the insert shaft 222, completing the position restoration and allowing the disassembly and assembly of the next bearing to proceed.

[0033] The above description is only a preferred embodiment of the present utility model. It should be noted that, for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions are all considered to be within the protection scope of the present utility model.

Claims

1. A bearing assembly and disassembly shaft end support device, comprising a cylindrical body (1) and a screw (2) threadedly connected to the upper end of the cylindrical body (1), wherein the top end of the screw (2) is provided with a screw cross-shaped opening and the lower end is smooth, a handle (3) is provided on the upper side of the screw (2), and a gripping cylinder (4) with anti-slip grooves is provided on the top end of the cylindrical body (1), characterized in that, The lower side of the cylinder (1) is provided with three sets of extensions (5) extending downwards. The inner side of the extension (5) is provided with a support mechanism (6). The side edge of the extension (5) is provided with a sliding groove I (51). The middle part of the extension (5) is provided with a sliding groove II (52). The support mechanism (6) includes a triangular support frame (61) located between adjacent extensions (5) and a sleeve (21) and a limiting member (22) sleeved on the lower end of the screw (2). The sleeve (21) is an inverted frustum shape, and the lower part of the sleeve (21) has an annular groove (211). The acute angle A of the short side of the support frame (61) is located in the groove (211), and the acute angle B of the long side of the support frame (61) is horizontal to the lower side of the extension (5). The front and rear side walls of the support frame (61) are in contact with the side walls of the extension (5). A retaining pin (611) that engages with the sliding groove I (51) is provided at the middle of the top of the support frame (61).

2. The bearing assembly and disassembly shaft end support device according to claim 1, characterized in that, The lower end of the screw (2) has a protrusion for supporting the sleeve (21) and the limiting member (22), and the screw (2) has an annular groove (23) at the part of the limiting member (22).

3. The bearing assembly and disassembly shaft end support device according to claim 1, characterized in that, The limiting member (22) includes a limiting ring (221) and three sets of insert shafts (222) distributed at the same angle inside the limiting ring (221). The left part of the insert shaft (222) is a columnar body and extends inward through the limiting ring (221) into the slot (23). The right part of the insert shaft (222) is a strip-shaped body, and its front and rear side walls are serrated. The lower right end of the insert shaft (222) has an inclined surface, or the lower right end and the upper right end of the insert shaft (222) both have an inclined surface. A spring (223) is provided on the outside of the columnar body of the insert shaft (222) to elastically support the insert shaft (222) outward.

4. The bearing assembly / disassembly shaft end support device according to claim 3, characterized in that, The right end of the insert shaft (222) extends into the groove II (52), and the side wall of the groove II (52) located outside the insert shaft (222) is provided with meshing grooves (521) for meshing with the serrated side wall of the insert shaft (222).

5. The bearing assembly and disassembly shaft end support device according to claim 1, characterized in that, An adjusting ring (7) is provided on the outer side of the cylinder (1) at the meshing groove (521). Three sets of L-shaped engaging pieces (71) are provided on the adjusting ring (7) and engage with the right end of the insert shaft (222). The vertical wall of the L-shaped engaging piece (71) contacts the right side wall of the insert shaft (222), and the horizontal wall of the L-shaped engaging piece (71) contacts the upper side wall of the insert shaft (222). A triangular pressing block (72) is provided on the lower side of the engaging piece (71), and the inclined surface of the pressing block (72) cooperates with the inclined surface of the lower right end of the insert shaft (222). The distance between the lower end face of the engaging piece (71) and the pressing block (72) is the height of one insert shaft (222).

6. The bearing disassembly and assembly shaft end support device according to claim 1, characterized in that, The bottom of the slide groove I (51) is fitted with a fixing plug (511), and the outer wall of the fixing plug (511) is attached to the inclined surface of the support frame (61).

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