Expansion type ball bearing puller device

Abstract

The utility model discloses an expansion type ball bearing puller device which comprises a top plate, two hollow sleeves, two expansion sleeves and two pull rods. The two hollow sleeves are symmetrically and vertically fixed on the top plate respectively; the bottom ends of the two pull rods are respectively nested in the two expansion sleeves, and the top end of each pull rod is inserted from the bottom end of the hollow sleeve and extends out of the top end of the hollow sleeve, so that the pull rods and the expansion sleeves positioned at the bottom ends of the pull rods are nested in the hollow sleeve together. The first end of each expansion sleeve is connected with the hollow sleeve and arranged at the bottom of the hollow sleeve, a second through hole is formed in the first end, a through groove is formed in the second end of each expansion sleeve, the bottom end of the through groove is conical, and the through groove is communicated with the second through hole; the bottom end of each pull rod is a conical end, and the shape of the conical end is matched with the shape of the bottom end of the through groove.

Description

Technical Field

[0001] The utility model relates to the field of disassembly devices, in particular to an expansion type ball bearing pulling device. Background Art

[0002] The bearing puller is the main tool for disassembling bearings. It is generally composed of a rotary handle, a screw rod and a puller claw. The bearing puller is mainly divided into two claws and three claws. The length, spacing and screw length of the puller claws are different, which can adapt to the installation of bearings with different diameters and axial depth requirements.

[0003] Currently, the existing bearing puller devices are mainly steel and iron claw-hook pullers for external bearings, and there are few puller devices for disassembling embedded bearings. The prior art CN216180210U discloses a puller device for disassembling built-in bearings, which inserts the head of the flat-head auxiliary pull rod into the gap between the rollers of the bearing and clamps it, and rotates the push rod to remove the bearing from the shaft. However, this device cannot be used to disassemble built-in bearings without a central shaft, nor can it be used for disassembly of both external bearings and built-in bearings. Utility Model Content

[0004] The utility model aims to provide an expansion type ball bearing pulling device, which can simultaneously meet the use requirements of disassembling external bearings and internal bearings.

[0005] In order to achieve the above-mentioned purpose, the utility model provides an expansion type ball bearing puller, comprising: a top plate, two hollow sleeves, two expansion sleeves, and two pull rods; the two hollow sleeves are respectively and symmetrically fixed vertically on the top plate; the bottom ends of the two pull rods are respectively nested in the two expansion sleeves, the top end of each pull rod is inserted from the bottom end of the hollow sleeve and extends from the top end of the hollow sleeve, so that the pull rod and the expansion sleeve located at the bottom end of the pull rod are nested in the hollow sleeve together;

[0006] The first end of each expansion sleeve is connected to the hollow sleeve and is arranged at the bottom of the hollow sleeve. A second through hole is arranged in the first end. A through groove is arranged at the second end of each expansion sleeve. The bottom end of the through groove is conical, and the through groove is connected to the second through hole.

[0007] The bottom end of each pull rod is a tapered end, and the shape of the tapered end matches the shape of the bottom end of the through slot.

[0008] Optionally, it also includes two support rods, which are symmetrically and vertically fixed on the top plate; when the built-in bearing is disassembled, the two support rods are respectively fixed to the bearing seats on both sides of the bearing to provide upward supporting force for the bearing to be separated from the bearing seat.

[0009] Optionally, two slide grooves are symmetrically provided on the top plate, a hollow sleeve and a support rod are placed in each of the slide grooves, and the support rod is arranged on the outside of the hollow sleeve.

[0010] Optionally, it also includes a top screw, which is installed in the center of the top plate through a first through hole opened on the top plate; when disassembling the external bearing and the built-in bearing with a shaft in the center, the bottom end of the top screw contacts the upper surface of the shaft arranged in the middle of the bearing, and the top screw is rotated downward to provide an upward force for the pulling device.

[0011] Optionally, the first end of the expansion sleeve is provided with a thread structure corresponding to the thread on the inner surface of the hollow casing, and the expansion sleeve and the bottom end of the hollow casing are connected by threads so that they can move upward along the axial direction of the hollow casing.

[0012] Optionally, the inner wall of the second through hole of the expansion sleeve is provided with a thread structure matching the thread on the surface of the pull rod, and the pull rod and the expansion sleeve are connected by threads, so that the pull rod can move upward along the axial direction of the second through hole to expand the expansion sleeve.

[0013] Optionally, when the expansion sleeve is in an initial state, the tapered end of the pull rod is located at the bottom end of the through slot, and by moving the pull rod upward, the tapered end of the pull rod moves upward along the through slot, causing the expansion sleeve to expand; when the tapered end of the pull rod moves to the top of the through slot, the thread of the pull rod will be clamped with the thread of the inner wall of the second through hole of the expansion sleeve, fixing the pull rod and the expansion sleeve together, and when the pull rod continues to move upward, the pull rod will drive the expansion sleeve to move upward along the thread of the inner surface of the hollow casing.

[0014] Optionally, the expansion sleeve is made of red copper or steel.

[0015] Optionally, it also includes a first fixing member and a second fixing member, wherein the first fixing member fixes the support rod on the top plate slide groove, and the second fixing member fixes the hollow sleeve on the top plate slide groove, and the first fixing member and the second fixing member are both provided with a third through hole, so that the support rod and the pull rod can pass through the third through hole.

[0016] Optionally, the inner walls of the third through holes of the first fixing member and the second fixing member are both provided with threads, and correspond to the threads on the surfaces of the support rod and the pull rod respectively, and the length of the support rod and the pull rod contacting the bearing side below the top plate can be adjusted by rotating the support rod and the pull rod.

[0017] Compared with the prior art, the technical solution of the utility model has at least the following beneficial effects:

[0018] The utility model device is provided with an expansion sleeve, which clamps the bottom of the bearing outer ring or the gap between the bearing outer ring and the bearing inner ring through the expansion sleeve, so that the utility model device can disassemble the external bearing and the built-in bearing with a shaft in the center, and a support rod is provided to provide support for the process of disassembling the built-in bearing without a shaft in the center, so that the utility model device can be applied to all situations of disassembling the external bearing and the built-in bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The utility model is a schematic structural diagram of the expansion ball bearing code pulling device.

[0020] Figure 2 The utility model is a schematic diagram of the top plate structure of the expansion ball bearing puller device.

[0021] Figure 3 The utility model is a schematic diagram of the expansion sleeve structure of the expansion ball bearing puller device.

[0022] Figure 4 The utility model is a schematic diagram of disassembling the external bearing of the expansion ball bearing pulling device.

[0023] In the figure: 1-top plate, 11-slide groove, 12-first through hole, 2-hollow casing, 3-expansion sleeve, 31-through groove, 32-second through hole, 33-threaded structure, 34-boss, 4-support rod, 5-pull rod, 6-top screw, 7-first fixing member, 8-second fixing member, 91-shaft, 92-bearing. DETAILED DESCRIPTION

[0024] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] Figure 1 The schematic diagram of the structure of the expansion ball bearing puller device of the utility model is shown, and the puller comprises: a top plate 1, two hollow sleeves 2, two expansion sleeves 3, two support rods 4, two tie rods 5, a top screw 6 and a plurality of fixings. The two hollow sleeves 2 and the two support rods 4 are vertically fixed on the top plate 1 by fixings, and the two hollow sleeves 2 are symmetrically placed with each other, and the two support rods 4 are also symmetrically placed with each other; the bottom ends of the two tie rods 5 are respectively nested in the two expansion sleeves 3, and the top end of each tie rod 5 is inserted from the bottom end of the hollow sleeve 2 and extends from the top end of the hollow sleeve 2, so that the tie rod 5 and the expansion sleeve 3 located at the bottom end of the tie rod 5 are nested in the hollow sleeve 2 together; the top screw 6 is arranged on the top plate 1.

[0028] like Figure 2 As shown, the top plate 1 is a plate-like structure, with a first through hole 12 in the middle, and slidable grooves 11 symmetrically arranged on both sides of the first through hole 12, each of which is used to place a hollow sleeve 2 and a support rod 4, and the support rod 4 is arranged on the outside of the hollow sleeve 2, and the distance between the hollow sleeve 2 and the support rod 4 can be adjusted according to the need for disassembly. The two support rods 4 pass through the two slidable grooves 11 on the top plate 1 respectively, and are symmetrically fixed to the top plate 1 with the first through hole 12 as the center through the first fixing member 7. The two hollow sleeves 2 are arranged on the inner side of the two support rods 4, and pass through the two slidable grooves 11 on the top plate 1 respectively, and are symmetrically fixed to the top plate 1 with the first through hole 12 as the center through the second fixing member 8; the inner surface of each hollow sleeve 2 is provided with a thread. The top screw 6 passes through the first through hole 12 of the top plate 1, and is installed on the top plate 1 through the threaded structure arranged on the surface of the top screw 6.

[0029] Furthermore, the two pull rods 5 are respectively disposed in the two hollow sleeves 2, and the bottom end of each pull rod 5 is a tapered end, and the top end passes through the second fixing member 8 and then extends out from the top of the hollow sleeve 2. The outer surface of each pull rod 5 is provided with threads.

[0030] like Figure 3As shown, the two expansion sleeves 3 are respectively arranged at the bottom ends of the two hollow sleeves 2, and the outer surface of the first end of each expansion sleeve 3 is provided with a thread structure 33 corresponding to the thread of the inner surface of the hollow sleeve 2, and is connected to the hollow sleeve 2 through the thread structure. The second end of the expansion sleeve 3 is provided with a circle of bosses 34, and the outer diameter of the bosses 34 is larger than the outer diameter of the main part of the expansion sleeve 3; further, the second end of the expansion sleeve 3 is also provided with a through groove 31, which extends upward from the boss 34 to the main part of the expansion sleeve 3, and the boss 34 is divided into two symmetrical parts by the through groove 31; the bottom end of the through groove 31 is conical, and its shape matches the conical end of the pull rod 5. A second through hole 32 is provided at the first end of each expansion sleeve 3 along its axial direction, the bottom end of the second through hole 32 is connected to the top end of the through groove 31, and a thread structure matching the surface thread of the pull rod 5 is provided on the inner wall of the second through hole 32. The top end of the pull rod 5 is inserted from the through groove 31 of the expansion sleeve, and rotated upward through the second through hole 32 of the expansion sleeve 3 through the thread structure on the inner wall of the second through hole 32 until the tapered end of the pull rod 5 matches the shape of the bottom end of the through groove 31.

[0031] When the pulling code device is in the initial state, the tapered end of the pull rod 5 is located at the bottom end of the through groove 31, and the expansion sleeve 3 is in the initial state. The pull rod 5 can be rotated to move upward, so that the tapered end of the pull rod 5 moves upward along the through groove 31 to expand the expansion sleeve 3. When the tapered end of the pull rod 5 moves to the top of the through groove 31, the thread of the pull rod 5 will be clamped with the thread on the second through hole surface of the expansion sleeve 3, so that the pull rod 5 and the expansion sleeve 3 are fixed together. From then on, the pull rod 5 and the expansion sleeve 3 are stationary with each other and no relative movement occurs. When the pull rod 5 continues to move upward by rotating, it drives the expansion sleeve 3 to rotate together and moves upward along the thread on the inner surface of the hollow casing 2.

[0032] In a preferred embodiment, the first fixing member 7 and the second fixing member 8 may be hexagonal screws, and a third through hole is provided in the middle position of the first fixing member 7 and the second fixing member 8, so that the support rod 4 and the pull rod 5 can pass through, and the inner wall of the third through hole is provided with a thread, which corresponds to the thread on the surface of the support rod 4 and the pull rod 5 respectively, and the length of the support rod 4 or the pull rod 5 contacting the bearing side below the top plate 1 can be changed by rotating the support rod 4 or the pull rod 5.

[0033] like Figure 4As shown, for an external bearing, the shaft 91 is nested in the bearing 92, and the outer side of the bearing 92 is exposed. When disassembling the external bearing, the bearing 92 is placed between the two hollow sleeves 2, and the bosses 34 at the second ends of the two expansion sleeves 3 are placed at the bottom of the outer ring of the bearing 92, so that the bearing 92 is clamped between the two expansion sleeves 3, and the two pull rods 5 are rotated upward at the same time to expand the second ends of the two expansion sleeves 3 at the same time. When the two pull rods 5 are rotated at the same time to be locked with the inner wall threads of the second through holes 32 of the corresponding expansion sleeves 3, the outer edges of the second ends of the two expansion sleeves 3 completely clamp the outer ring of the bearing so that the bearing 92 is fixed. At this time, the top screw 6 is adjusted, and the bottom end of the top screw 6 is rotated downward to contact the upper surface of the shaft 91 located inside the bearing 92, and the top screw 6 is further rotated to move downward. When the bearing 92 is fixed, a downward force is applied to the shaft 91, so as to remove the bearing 92.

[0034] With built-in bearings, the bearing is nested in a housing. When disassembling a built-in bearing without a central shaft, there is no shaft set inside the bearing, and the top screw 6 cannot be used to provide support for the utility model device. Therefore, the positions of the two support rods 4 are adjusted at the same time, and they are respectively fixed on the bearing seats on both sides of the bearing to be disassembled to provide downward support force for pulling the bearing outward; the positions of the two expansion sleeves 3 are synchronously adjusted to be set in the gap between the outer ring and the inner ring of the bearing, and the two expansion sleeves 3 are synchronously expanded by rotating the two pull rods 5 upward at the same time, so that the boss 34 of the expansion sleeve 3 is clamped in the lower side of the edge at the edge of the inner ring and the outer ring of the bearing, and the two pull rods 5 are continued to be rotated upward synchronously, so that the threads of the pull rods 5 are clamped with the thread structure of the second through hole in the expansion sleeve 3, and the pull rods 5 and the expansion sleeve 3 are fixed together to ensure that the expansion sleeve 3 will not fall off from the gap between the inner ring and the outer ring of the bearing; the two pull rods 5 are continued to be rotated upward at the same time, so that the upward movement of the pull rods 5 can drive the expansion sleeve 3 to move further upward along the thread on the inner surface of the hollow sleeve, until the bearing is removed from the bearing seat.

[0035] For built-in bearings with a shaft in the center, the bearing is nested in the bearing seat, and the shaft is nested in the bearing. When disassembling the bearing, fix the two support rods 4 on the bearing seats on both sides of the disassembled bearing to provide downward support force for the bearing to be separated from the bearing seat; at the same time, adjust the positions of the two expansion sleeves 3 so that they are set in the gap between the outer ring and the inner ring of the bearing, and expand the two expansion sleeves 3 synchronously by rotating the two pull rods 5 upward synchronously, so that the outer edges of the two expansion sleeves 3 are synchronously clamped in the lower side of the edges of the inner and outer rings of the bearing, and continue to rotate the two pull rods 5 upward synchronously so that the threads of the pull rods 5 are clamped with the thread structure of the second through hole in the expansion sleeve 3, and the pull rods 5 and the expansion sleeve 3 are connected. The sleeves 3 are fixed together to ensure that the expansion sleeve 3 will not fall off from the gap between the inner ring and the outer ring of the bearing; at this time, adjust the top screw 6 downward so that the bottom of the top screw 6 contacts the upper surface of the shaft, providing downward support force for the bearing to detach from the shaft; continue to rotate the two pull rods 5 upward synchronously, so that the upward movement of the pull rods 5 can drive the expansion sleeve 3 to move further upward along the thread on the inner surface of the hollow casing. At this time, the bearing seat and the shaft are respectively fixed by the support rod 4 and the top screw 6, and as the two pull rods 5 rotate upward synchronously, the bearing is detached from the bearing seat and the shaft, thereby removing the bearing.

[0036] In actual use, the model and material of the expansion sleeve 3 can be changed according to the need for disassembly. In the embodiment of bearing assembly, when the bearing needs to be pulled out due to installation errors, the expansion sleeve 3 is made of red copper to reduce the damage to the bearing caused by the pull code; in the embodiment of bearing maintenance, when the bearing is disassembled, the expansion sleeve 3 can be made of steel.

[0037] In summary, the device of the utility model is provided with an expansion sleeve, which clamps the bottom of the outer ring of the bearing or the gap between the outer ring of the bearing and the inner ring of the bearing through the expansion sleeve, so that the device of the utility model can disassemble the external bearing and the built-in bearing with a central shaft, and a support rod is provided to provide support for the process of disassembling the built-in bearing without a central shaft, so that the device of the utility model can be applied to all situations of disassembling external bearings and built-in bearings.

[0038] Although the content of the utility model has been described in detail through the above preferred embodiments, it should be appreciated that the above description should not be considered as a limitation of the utility model. After reading the above content, various modifications and substitutions of the utility model will be obvious to those skilled in the art. Therefore, the protection scope of the utility model should be limited by the attached claims.

Claims

1. An expansion ball bearing puller device, characterized in that: include: Top plate, two hollow casings, two expansion sleeves, and two tie rods; The two hollow sleeves are symmetrically and vertically fixed on the top plate respectively; the bottom ends of the two tie rods are respectively embedded in the two expansion sleeves, and the top end of each tie rod is inserted from the bottom end of the hollow sleeve and extends from the top end of the hollow sleeve, so that the tie rod and the expansion sleeve located at the bottom end of the tie rod are embedded in the hollow sleeve together; The first end of each expansion sleeve is connected to the hollow sleeve and is arranged at the bottom of the hollow sleeve. A second through hole is arranged in the first end. A through groove is arranged at the second end of each expansion sleeve. The bottom end of the through groove is conical, and the through groove is connected to the second through hole. The bottom end of each pull rod is a tapered end, and the shape of the tapered end matches the shape of the bottom end of the through slot.

2. The expansion ball bearing puller device according to claim 1, characterized in that: It also includes two support rods, which are symmetrically and vertically fixed on the top plate; when disassembling the built-in bearing, the two support rods are fixed on the bearing seats on both sides of the bearing to provide upward supporting force for the bearing to be separated from the bearing seat.

3. The expansion ball bearing puller device according to claim 2, characterized in that: Two slide grooves are symmetrically arranged on the top plate, a hollow sleeve and a support rod are placed in each of the slide grooves, and the support rod is arranged on the outside of the hollow sleeve.

4. The expansion ball bearing puller device according to claim 1, characterized in that: It also includes a top screw, which is installed in the center of the top plate through a first through hole opened on the top plate; when disassembling the external bearing and the internal bearing with a shaft in the center, the bottom end of the top screw contacts the upper surface of the shaft arranged in the middle of the bearing, and the top screw is rotated downward to provide an upward force for the pulling device.

5. The expansion ball bearing puller device according to claim 1, characterized in that: The first end of the expansion sleeve is provided with a thread structure corresponding to the thread on the inner surface of the hollow casing. The expansion sleeve and the bottom end of the hollow casing are connected by threads so that the expansion sleeve can move upward along the axial direction of the hollow casing.

6. The expansion ball bearing puller device according to claim 5, characterized in that: The inner wall of the second through hole of the expansion sleeve is provided with a thread structure matching the thread on the surface of the pull rod. The pull rod and the expansion sleeve are connected by threads, so that the pull rod can move upward along the axial direction of the second through hole to expand the expansion sleeve.

7. The expansion ball bearing puller device according to claim 6, characterized in that: When the expansion sleeve is in the initial state, the tapered end of the pull rod is located at the bottom end of the through slot. By moving the pull rod upward, the tapered end of the pull rod moves upward along the through slot, causing the expansion sleeve to expand. When the tapered end of the pull rod moves to the top of the through slot, the thread of the pull rod will be clamped with the thread of the inner wall of the second through hole of the expansion sleeve, fixing the pull rod and the expansion sleeve together. When the pull rod continues to move upward, the pull rod will drive the expansion sleeve to move upward along the thread of the inner surface of the hollow casing.

8. The expansion ball bearing puller device according to claim 1, characterized in that: The expansion sleeve is made of red copper or steel.

9. The expansion ball bearing puller device according to claim 1, characterized in that: It also includes a first fixing member and a second fixing member, wherein the first fixing member fixes the support rod on the top plate slide groove, and the second fixing member fixes the hollow sleeve on the top plate slide groove, and the first fixing member and the second fixing member are both provided with a third through hole, allowing the support rod and the pull rod to pass through the third through hole.

10. The expansion ball bearing pulling device according to claim 9, characterized in that: The inner walls of the third through holes of the first fixing member and the second fixing member are both provided with threads, which correspond to the threads on the surfaces of the support rod and the pull rod respectively, and the length of the support rod and the pull rod contacting the bearing side below the top plate can be adjusted by rotating the support rod and the pull rod.

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