Device convenient for mounting shaft and bearing

Abstract

The utility model relates to a device convenient to install a shaft and a bearing, which belongs to the technical field of mechanical installation and comprises a detachable steel head and a steel ball tensioning structure, the detachable steel head can provide a function of installing the shaft, and the steel ball tensioning structure can provide a function of installing an external bearing. A fit clearance between a bearing and a shaft is particularly important, interference fit is not easy to assemble, the efficiency of workers is reduced, and the yield is low; in transition fit, the friction force between the bearing and the shaft is reduced, the shaft rotates, and the bearing and the shaft are damaged; furthermore, the shaft and the shaft sleeve are assembled in a bonding manner and the like, so that the working efficiency is low, and repeated disassembly and assembly are inconvenient; according to the utility model, the problem of relative rotation of the bearing and the shaft is effectively solved through the steel ball tensioning structure, and the problem that the shaft and the shaft sleeve are inconvenient to disassemble and assemble repeatedly is effectively solved through the detachable steel head.

Description

Technical Field

[0001] The utility model relates to a device for facilitating the installation of a shaft and a bearing, belonging to the technical field of mechanical installation. Background Art

[0002] With the continuous development of the machinery industry, shafts and bearings, as important components of mechanical transmission systems, are widely used in various mechanical equipment.

[0003] According to the weight lifting mechanism of the bicycle frame front fork combination drop weight test machine disclosed in Chinese invention patent CN101046426A, it includes a weight for drop weight impact, a frame-shaped cylinder support located above the weight support supporting the cylinder, a cylinder for lifting the weight, a cylinder piston and a piston rod extending downward inside the cylinder, and a weight lifting fixture, which is composed of a weight connection block fixed above the weight, an expansion core for expanding and contracting the expansion bead, a spherical expansion bead, a sliding sleeve fixed at the lower end of the piston rod, a screw and a retaining ring for connection), a collision rod for colliding the expansion core, and a collision block for positioning the collision rod. The weight lifting mechanism uses a cylinder as a power source, and a steel ball tensioning mechanism is inserted into the hole of the weight. After tensioning, the weight is lifted by the cylinder, so that the weight lifting is convenient, safe, and labor-saving, thereby improving work efficiency.

[0004] The fitting clearance between the bearing and the shaft is particularly important. If there is an interference fit, assembly is difficult, worker efficiency decreases, and the yield rate is low. If there is an overfit, the friction between the bearing and the shaft decreases, and the shaft rotates, causing damage to the bearing and shaft, and even serious damage to the equipment. Furthermore, the assembly between the shaft and the sleeve is usually done by bonding, which not only has low work efficiency but also is inconvenient for repeated disassembly and installation. Utility Model Content

[0005] The technical problem to be solved by the utility model is that the traditional assembly of shaft and bearing is either interference fit, which makes assembly difficult, or transition fit, which reduces the friction between the bearing and the shaft and causes shaft rotation due to improper assembly clearance; in addition, the shaft and the sleeve are fixed with glue, which is time-consuming and laborious to disassemble and install, and is inconvenient for repeated disassembly of the shaft and the sleeve.

[0006] The utility model discloses a device for facilitating the installation of a shaft and a bearing, comprising a detachable steel head and a steel ball tensioning structure.

[0007] The removable steel head can provide the function of installing the shaft, and the steel ball tensioning structure can provide the function of installing the external bearing.

[0008] Furthermore, the steel ball tensioning structure includes a bearing installation shaft section, the bearing installation shaft section is provided with a plurality of accommodating holes in a radial direction, the bearing installation shaft section is provided with a tightening hole in an axial direction, and the accommodating hole is communicated with the tightening hole;

[0009] A tensioner is arranged in the receiving hole, and the inner wall of the tensioning hole is connected to the outer surface of the set screw through threads;

[0010] The number of receiving holes is at least one.

[0011] The bearing installation shaft section is a bearing installation structure. A tensioning steel column can be placed in the receiving hole, and a set screw can be installed in the top tightening hole. The receiving hole and the top tightening hole are connected so that the set screw can push the tensioner to move outward during the tightening process, thereby improving the fit between the bearing and the shaft.

[0012] The number of receiving holes can be 1, 2 or 3.

[0013] Furthermore, there is a clearance fit between the tensioner and the receiving hole.

[0014] The transition fit can prevent the tensioning steel column from falling out of the receiving hole during the installation of the bearing mounting shaft section and the bearing, thereby improving the installation efficiency.

[0015] Furthermore, the end of the set screw is conical or arc-shaped.

[0016] The end of the set screw is conical or arc-shaped, and the conical or arc-shaped tip can convert the axial movement into the radial movement of the tensioner during use.

[0017] Furthermore, at least one opening is provided on the outer wall of the roller sleeve section, one end of the opening extends into the solid shaft section, and the detachable steel head is fixedly connected to the roller after the roller sleeve section is tightened by a tightening device.

[0018] The opening divides the roller sleeve section into several "petals". The tightening device can be used to tighten the several "petals" of the roller sleeve section and "grasp" one end of the roller. When disassembling, the tightening device is loosened to remove the steel head from the roller, which is convenient for disassembly and assembly without damaging the original structure. Disassembly and assembly will not reduce the installation accuracy, thus meeting the needs of long-term use.

[0019] Further, the opening is parallel to the axis of the detachable steel head.

[0020] Furthermore, the number of the openings is one or two, and the tightening device is a bolt, a stud, a screw or a clamp.

[0021] The number of openings is two, and the tightening device is a bolt. The axis of the bolt is perpendicular to and intersects with the axis of the detachable steel head, that is, the bolt passes through the axis of the steel head.

[0022] Furthermore, there are two openings which are symmetrically arranged, and the ends of the openings extend to the solid shaft section. The solid shaft section is provided with a slot hole which is connected with the opening and passes through the solid shaft section.

[0023] There are two openings which are symmetrically arranged. The ends of the openings extend to the solid shaft section. A slot hole which is connected to the opening and passes through the solid section is arranged in the solid shaft section, so that the opening of the solid shaft section has a certain elasticity, which is convenient for tightening the roller sleeve section.

[0024] Furthermore, the opening is perpendicular to the axis of the set screw.

[0025] The opening is perpendicular to the axis of the set screw, and the opening can be retracted back and forth during the use of the set screw, so as to facilitate the removal and installation of the external shaft.

[0026] Compared with the prior art, the beneficial effects of the utility model are:

[0027] The utility model discloses a device for facilitating the installation of shafts and bearings, comprising a detachable steel head and a steel ball tensioning structure, which solves the problems that the diameter of a traditional main shaft cannot be changed, one end of the main shaft is in a relatively tight fit, making it inconvenient to install the shaft and the hole, and the other end of the main shaft is in a relatively tight fit with the bearing, making it inconvenient to install the shaft and the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0029] Figure 2 It is a schematic diagram of the structure of the steel head;

[0030] In the figure: 1. Removable steel head; 2. Steel ball tensioning structure; 3. Shaft; 4. Bearing;

[0031] 11. Solid shaft section; 12. Roller sleeve section; 13. Opening; 14. Bolt; 15. Slotted hole;

[0032] 21. Bearing mounting shaft section; 22. Accommodating hole; 23. Tightening hole; 24. Tensioner; 25. Set screw. DETAILED DESCRIPTION

[0033] Example 1

[0034] like Figure 1-2 As shown, the device for facilitating the installation of shafts and bearings described in the utility model comprises a detachable steel head 1 and a steel ball tensioning structure 2.

[0035] The detachable steel head 1 can provide a function of installing the shaft 3, and the steel ball tensioning structure 2 can provide a function of installing the external bearing 4, which facilitates repeated disassembly of the shaft 3 and the bearing 4 on both sides.

[0036] like Figure 1-2As shown, as an optimization, the steel ball tensioning structure 2 includes a bearing installation shaft section 21, the bearing installation shaft section 21 has a plurality of accommodating holes 22 radially formed therein, and the bearing installation shaft section 21 has a tightening hole 23 axially formed therein, and the accommodating hole 22 is communicated with the tightening hole 23;

[0037] A tensioner 24 is provided in the receiving hole 22, and the inner wall of the tightening hole 23 is connected to the outer surface of the set screw 25 through threads;

[0038] The number of the receiving hole 22 is at least one.

[0039] The bearing installation shaft section 21 is a bearing installation structure. A tensioner 24 can be placed in the receiving hole 22, and a set screw 25 can be installed in the top tightening hole 23. The receiving hole 22 and the top tightening hole 23 are connected so that the set screw 25 can push the tensioner 24 to move outward during the tightening process, thereby improving the fit between the bearing 4 and the steel head.

[0040] The number of the receiving holes 22 can be 1, 2 or 3.

[0041] like Figure 1-2 As shown, as an optimization, there is a clearance fit between the tensioner 24 and the receiving hole 22 .

[0042] The transition fit can prevent the tensioning steel column from falling out of the receiving hole 22 during the installation of the bearing installation shaft section 21 and the bearing, thereby improving the installation efficiency.

[0043] like Figure 1-2 As shown, the end of the set screw 25 is conical or arc-shaped.

[0044] The end of the set screw 25 is conical or arc-shaped. The conical or arc-shaped tip can convert the axial movement of the set screw 25 into the radial movement of the tensioner 24 during use.

[0045] like Figure 1-2 As shown, as an optimization, at least one opening 13 is provided on the outer wall of the roller sleeve section 12, and one end of the opening 13 extends into the solid shaft section 11. The detachable steel head 1 is fixedly connected to the roller after the roller sleeve section 12 is tightened by a tightening device.

[0046] The opening 13 divides the roller sleeve section 12 into several "petals". The several "petals" of the roller sleeve section 12 can be tightened and "grasped" one end of the roller through a tightening device. When disassembling, the tightening device is loosened to remove the steel head from the roller, which is convenient for disassembly and assembly without damaging the original structure. Disassembly and assembly will not lead to a decrease in installation accuracy, thus meeting long-term use requirements.

[0047] like Figure 1-2 As shown, as an optimization, the opening 13 is parallel to the axis of the detachable steel head 1 .

[0048] like Figure 1 As shown, as an optimization, the number of openings 13 is one or two, and the tightening device is a bolt 14, a stud, a screw or a clamp.

[0049] There are two openings 13, and the tightening device is a bolt 14. The axis of the bolt 14 is perpendicular to and intersects with the axis of the detachable steel head 1, that is, the bolt 14 passes through the axis of the steel head.

[0050] like Figure 1-2 As shown, as an optimization, there are two openings 13 and they are symmetrically arranged, the ends of the openings 13 extend to the solid shaft section 11 , and the solid shaft section 11 is provided with a slot hole 15 that is connected to the opening 13 and passes through the solid shaft section 11 .

[0051] There are two openings 13 symmetrically arranged, and the ends of the openings 13 extend to the solid shaft section 11. The solid shaft section 11 is provided with a slot 15 that is connected to the opening 13 and passes through the solid shaft section 11, so that the opening 13 of the solid shaft section 11 has a certain elasticity, which is convenient for tightening the roller sleeve section 12.

[0052] like Figure 1-2 As shown, the opening 13 is perpendicular to the axis of the set screw 25 .

[0053] The opening 13 is perpendicular to the axis of the set screw 25 , and the opening 13 can be retracted back and forth during the use of the set screw 25 , so as to facilitate the disassembly and installation of the external shaft 3 .

[0054] Working process or working principle:

[0055] The two openings 13 are symmetrically arranged, and the ends of the openings 13 extend to the solid shaft section 11. The solid shaft section 11 is provided with a slot 15 that is connected to the openings 13 and passes through the solid shaft section 11, so that the openings 13 of the solid shaft section have a certain elasticity, which is convenient for tightening the roller sleeve section 12;

[0056] A tensioner 24 is placed in the accommodating hole 22, and the tensioner 24 and the accommodating hole 22 are clearance-matched. The external bearing 4 is mounted on the bearing mounting shaft section 21, and a set screw 25 is used to match the tightening hole 23. When the set screw 25 moves inward, the cone head of the set screw 25 pushes the tensioner 24 to move outward, so that the tensioner 24 is tightly matched with the inner ring of the bearing, thereby preventing the bearing 4 and the bearing mounting shaft section 21 from rotating relative to each other during use.

[0057] The description of the direction and relative position relationship of the structure in the present invention, such as the description of front, back, left, right, up, and down, does not constitute a limitation of the present invention, but is only for the convenience of description.

Claims

1. A device for facilitating the installation of shafts and bearings, characterized in that: It comprises a detachable steel head (1) and a steel ball tensioning structure (2).

2. The device for facilitating installation of shafts and bearings according to claim 1, characterized in that: The steel ball tensioning structure (2) comprises a bearing installation shaft section (21), the bearing installation shaft section (21) is provided with a plurality of accommodating holes (22) in the radial direction, the bearing installation shaft section (21) is provided with a tightening hole (23) in the axial direction, and the accommodating hole (22) is communicated with the tightening hole (23); A tensioner (24) is provided in the receiving hole (22), and the inner wall of the tightening hole (23) is connected to the outer surface of the tightening screw (25) through threads; The number of the receiving hole (22) is at least one.

3. The device for facilitating installation of shafts and bearings according to claim 2, characterized in that: There is a clearance fit between the tensioner (24) and the receiving hole (22).

4. The device for facilitating installation of shafts and bearings according to claim 3, characterized in that: The end of the set screw (25) is conical or arc-shaped.

5. The device for facilitating installation of shafts and bearings according to claim 1, characterized in that: The detachable steel head (1) comprises a solid shaft section (11) and a roller sleeve section (12); at least one opening (13) is provided on the outer wall of the roller sleeve section (12); one end of the opening (13) extends into the solid shaft section (11); and the detachable steel head (1) is fixedly connected to the roller after the roller sleeve section (12) is tightened by a tightening device.

6. The device for facilitating installation of shafts and bearings according to claim 5, characterized in that: The opening (13) is parallel to the axis of the detachable steel head (1).

7. The device for facilitating installation of shafts and bearings according to claim 6, characterized in that: The number of the openings (13) is one or two, and the tightening device is a bolt (14), a stud, a screw or a clamp.

8. The device for facilitating installation of shafts and bearings according to claim 7, characterized in that: The number of the openings (13) is two and they are symmetrically arranged. The ends of the openings (13) extend to the solid shaft section (11). The solid shaft section (11) is provided with a slot hole (15) that is connected to the openings (13) and passes through the solid shaft section (11).

9. The device for facilitating installation of shafts and bearings according to claim 8, characterized in that: The opening (13) is perpendicular to the axis of the set screw (25).

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