Rotating wheel, rotating wheel device and press-in device

Abstract

According to the rotating wheel, the rotating wheel device and the press-in device, a fixing hole is formed in the rotating wheel, the two sides of the fixing hole are communicated with a retaining hole and a connecting hole respectively, and the radial size of the retaining hole and the radial size of the connecting hole are smaller than the radial size of the fixing hole, so that after a bearing is pressed into the fixing hole, axial movement of the bearing is limited through a first retaining shoulder and a second retaining shoulder formed by the retaining hole and the connecting hole; the bidirectional limiting of the axial direction of the bearing can be realized without adding parts, so that the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of bearing fixing devices, in particular to a rotating wheel, a rotating wheel device and a pressing device. Background Art

[0002] At present, standardized rolling bearings have been widely used in mechanical equipment due to their low friction coefficient. Rolling bearings are mainly composed of an outer ring, an inner ring and rolling elements. The inner ring and outer ring of the bearing are fixed on two parts respectively, and the rotation of the two parts is converted into the rolling of the rolling elements to achieve smooth rotation between the two parts. At the same time, to ensure the position of the bearing, a shoulder is generally set at one end of the bearing, and the other end is limited in the axial direction of the bearing through an end cover or a retaining ring with a slot structure.

[0003] However, in a microscope, the wheel is small in size, and the matching bearing is also small in size. If the traditional design uses a pressure ring to tighten, the pressure ring has a thin wall and the tightening effect is poor. Glue is needed for further tightening. If the amount of glue dispensed is too small, the tightening effect cannot meet the requirements. If the amount of glue dispensed is too large, glue overflow is likely to occur, increasing the workload of cleaning. Utility Model Content

[0004] In view of the shortcomings of the background technology, the purpose of the utility model is to provide a rotating wheel, a rotating wheel device and a pressing device.

[0005] A wheel comprises a wheel body, the wheel body is provided with a fixing hole for installing a bearing, the wheel body is provided with a backstop hole at one end of the fixing hole, and the wheel body is provided with a connecting hole at the other end of the fixing hole, at least the fixing hole and the backstop hole are coaxially arranged and connected, the apertures of the backstop hole and the connecting hole are respectively smaller than the aperture of the fixing hole, so that the wheel body forms a first shoulder between the backstop hole and the fixing hole, and a second shoulder between the connecting hole and the fixing hole; the bearing passes through the backstop hole into the fixing hole, and is limited between the first shoulder and the second shoulder.

[0006] Furthermore, the wheel body is provided with a guide cone hole at one end of the anti-retreat hole away from the fixing hole, the guide cone hole is coaxially arranged and connected to the anti-retreat hole, and the aperture of the guide cone hole gradually increases along the arrangement direction of the anti-retreat hole and the guide cone hole, and the minimum aperture of the guide cone hole is consistent with the aperture of the anti-retreat hole.

[0007] Furthermore, the wheel body is provided with a positioning hole at one end of the guide cone hole away from the stop hole, the positioning hole is coaxially arranged and connected to the guide cone hole, the aperture of the positioning hole is consistent with the maximum aperture of the guide cone hole, and is greater than or equal to the outer diameter of the outer ring of the bearing.

[0008] Furthermore, the outer ring of the bearing is interference fit with the fixing hole, and the axial dimension of the fixing hole is adapted to the axial dimension of the bearing.

[0009] Furthermore, the diameter of the connecting hole is smaller than the diameter of the anti-recessing hole.

[0010] A rotating wheel device comprises a bearing and a rotating wheel as described above, wherein the bearing is installed in the fixing hole.

[0011] Furthermore, a plurality of rolling elements are provided between the outer ring and the inner ring of the bearing.

[0012] A pressing device for pressing a bearing into a rotating wheel as described above, characterized in that it includes a workbench and a clamping mechanism, a pressing rod is provided at the output end of the clamping mechanism, the axis of the pressing rod is perpendicular to the table surface of the workbench, and a bearing is installed on the outside of one end of the pressing rod facing the table surface, the rotating wheel is positioned on the table surface of the workbench, and the clamping machine drives the pressing rod to move downward to press the bearing into the stop hole and enter the fixing hole.

[0013] Furthermore, a circle of limiting steps is provided at one end of the pressure rod facing the table surface, so that an inserting protrusion is formed at the end of the pressure rod facing the table surface, and the inner ring of the bearing is sleeved outside the inserting protrusion.

[0014] Furthermore, one end of the pressure rod facing the table surface abuts against a convex portion, and the abutting convex portion abuts against an outer ring of the bearing.

[0015] The beneficial effects of the utility model are:

[0016] 1. A rotating wheel proposed by the utility model has a fixing hole inside the rotating wheel, and a backstop hole and a connecting hole are respectively connected to both sides of the fixing hole. The radial dimensions of the backstop hole and the connecting hole are smaller than the radial dimension of the fixing hole, so that after the bearing is pressed into the fixing hole, the axial movement of the bearing is limited by the first shoulder and the second shoulder formed by the backstop hole and the connecting hole. Without adding parts, the two-way limitation of the axial direction of the bearing can be achieved, thereby reducing the production cost.

[0017] 2. The utility model proposes a press-in device, wherein the end of the pressure rod facing the table surface is provided with an inserting protrusion for sleeve-mounting the bearing, and the end of the pressure rod facing the table surface is also provided with an abutting protrusion for abutting the outer ring of the bearing, thereby improving the installation efficiency of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a cross-sectional view of a rotating wheel of the utility model;

[0020] Figure 2 It is a cross-sectional view of a rotating wheel device of the utility model;

[0021] Figure 3 for Figure 2 A partial enlarged view of the middle part;

[0022] Figure 4 It is a schematic diagram of a pressing device of the utility model;

[0023] Figure 5 It is a cross-sectional view of the pressure rod of the utility model;

[0024] In the figure, 10, the wheel body; 101, the fixing hole; 102, the anti-retraction hole; 103, the guide cone hole; 104, the connecting hole; 105, the positioning hole; 20, the bearing; 30, the pressure rod; 301, the plug-in protrusion; 302, the abutting protrusion. DETAILED DESCRIPTION

[0025] Combine the following Figure 1-5 The utility model is described in detail.

[0026] The utility model provides a rotating wheel, such as Figure 1 As shown, the rotor body 10 includes a fixing hole 101 for inserting a bearing 20, a stop hole 102 at one end of the fixing hole 101, and a connecting hole 104 at the other end of the fixing hole 101. At least the fixing hole 101 and the stop hole 102 are coaxially arranged and connected, and the apertures of the stop hole 102 and the connecting hole 104 are respectively smaller than the aperture of the fixing hole 101, so that the rotor body 10 forms a first stop shoulder between the stop hole 102 and the fixing hole 101, and a second stop shoulder between the connecting hole 104 and the fixing hole 101. The bearing 20 passes through the stop hole 102 and enters the fixing hole 101, and is limited between the first stop shoulder and the second stop shoulder.

[0027] Therefore, after the bearing 20 is pressed into the fixing hole 101, the double shoulder structure formed by the stop hole 102 and the connecting hole 104 limits the axial movement of the bearing 20. Without adding parts, bidirectional limitation of the axial direction of the bearing 20 can be achieved, thereby reducing production costs.

[0028] In the present embodiment, a guide cone hole 103 is provided at one end of the wheel body 10 which is away from the fixing hole 101 and the stop hole 102. The guide cone hole 103 is coaxially arranged and connected with the stop hole 102, and the aperture of the guide cone hole 103 gradually increases along the arrangement direction of the stop hole 102 and the guide cone hole 103. The minimum aperture of the guide cone hole 103 is consistent with the aperture of the stop hole 102.

[0029] In this embodiment, the wheel body 10 is provided with a positioning hole 105 at one end of the guide cone hole 103 away from the stop hole 102. The positioning hole 105 allows the bearing 20 to be quickly coaxially positioned with the fixing hole 101. The positioning hole 105 is coaxially arranged and connected with the guide cone hole 103. The aperture of the positioning hole 105 is consistent with the maximum aperture of the guide cone hole 103 and is greater than or equal to the outer diameter of the outer ring of the bearing 20. The radial dimensions of the positioning hole 105, the fixing hole 101 and the stop hole 102 decrease in sequence. The dimensional relationship between the positioning hole 105, the fixing hole 101 and the stop hole 102 enables the radial dimension difference to be set based on the dimension of the positioning hole 105 during the CNC machining process, and the radial dimension of other hole positions can be controlled by controlling the radial dimension of the positioning hole 105, which is convenient for machining.

[0030] In this embodiment, the outer ring of the bearing 20 is interference fit with the fixing hole 101 , the axial dimension of the fixing hole 101 is adapted to the axial dimension of the bearing 20 , and the aperture of the connecting hole 104 is smaller than the aperture of the stop hole 102 .

[0031] The utility model also provides a rotating wheel device, such as Figure 2-3 As shown, it includes a bearing 20 and a rotating wheel as described above. The bearing 20 is installed in a fixing hole 101 , and a plurality of rolling elements are arranged between the outer ring and the inner ring of the bearing 20 .

[0032] The utility model also provides a pressing device, such as Figure 4 As shown, it is used to press the bearing 20 into the rotating wheel as mentioned above, and is characterized in that it includes a workbench and a clamping mechanism, a pressure rod 30 is provided at the output end of the clamping mechanism, the axis of the pressure rod 30 is perpendicular to the table surface of the workbench, and a bearing 20 is installed outside the end of the pressure rod 30 facing the table surface, the rotating wheel is positioned on the table surface of the workbench, and the clamping machine drives the pressure rod 30 to move downward, pressing the bearing 20 into the stop hole 102 and into the fixing hole 101.

[0033] Specifically, during the pressing process of the bearing 20, the outer ring of the bearing 20 enters the fixing hole 101 from the positioning hole 105 through the guide cone hole 103, and the friction force gradually increases from a small amount through the guide cone hole 103, forming a sliding friction force, so it is easy to press in. After the bearing 20 is installed in the fixing hole 101, since the stop hole 102 is set on the retreat path of the bearing 20, the limiting friction force is static friction, and the maximum static friction force must be overcome before sliding. Since the maximum static friction force is greater than the sliding friction force, the bearing 20 cannot be disengaged from the fixing hole 101, achieving the limiting purpose.

[0034] In this embodiment, a circle of limiting steps is provided at one end of the pressure rod 30 facing the table, so that the end of the pressure rod 30 facing the table forms a plug-in convex portion 301, the inner ring of the bearing 20 is sleeved outside the plug-in convex portion 301, and the end of the pressure rod 30 facing the table is also provided with an abutting convex portion 302 for abutting the outer ring of the bearing 20. Further, the radial dimension of the pressure rod 30 is between the outer diameter dimension of the outer ring of the bearing 20 and the inner diameter dimension of the outer ring of the bearing 20, and the radial dimension of the pressure rod 30 is smaller than the radial dimension of the stop hole 102, so that the pressure rod 30 passes through the stop hole 102 to press the bearing 20 into the fixing hole 101.

[0035] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable those skilled in the art to understand the content of the utility model and implement it, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A wheel, comprising a wheel body, wherein the wheel body is provided with a fixing hole for inserting a bearing, characterized in that: The wheel body is provided with a stop hole at one end of the fixing hole, and the wheel body is provided with a connecting hole at the other end of the fixing hole. At least the fixing hole and the stop hole are coaxially arranged and connected, and the apertures of the stop hole and the connecting hole are respectively smaller than the aperture of the fixing hole, so that the wheel body forms a first shoulder between the stop hole and the fixing hole, and a second shoulder between the connecting hole and the fixing hole; the bearing passes through the stop hole and enters the fixing hole, and is limited between the first shoulder and the second shoulder.

2. The rotating wheel according to claim 1, characterized in that: The wheel body is provided with a guide cone hole at one end of the anti-retreat hole away from the fixing hole. The guide cone hole is coaxially arranged and connected with the anti-retreat hole, and the aperture of the guide cone hole gradually increases along the arrangement direction of the anti-retreat hole and the guide cone hole, and the minimum aperture of the guide cone hole is consistent with the aperture of the anti-retreat hole.

3. A rotating wheel as claimed in claim 2, characterized in that: The wheel body is provided with a positioning hole at one end of the guide cone hole away from the stop hole. The positioning hole is coaxially arranged and connected with the guide cone hole. The aperture of the positioning hole is consistent with the maximum aperture of the guide cone hole and is greater than or equal to the outer diameter of the outer ring of the bearing.

4. A rotating wheel as claimed in claim 1, characterized in that: The outer ring of the bearing is interference fit with the fixing hole, and the axial dimension of the fixing hole is adapted to the axial dimension of the bearing.

5. A rotating wheel as claimed in claim 1, characterized in that: The diameter of the connecting hole is smaller than the diameter of the anti-retraction hole.

6. A wheel device, comprising a bearing, characterized in that: It also includes a rotating wheel as described in any one of claims 1 to 5, wherein the bearing is installed in the fixing hole.

7. The wheel device according to claim 6, characterized in that: A plurality of rolling elements are arranged between the outer ring and the inner ring of the bearing.

8. A pressing device for pressing a bearing into a running wheel according to any one of claims 1 to 5, characterized in that: It includes a workbench and a clamping mechanism, wherein a pressure rod is provided at the output end of the clamping mechanism, the axis of the pressure rod is perpendicular to the table surface of the workbench, and a bearing is installed outside the end of the pressure rod facing the table surface, the rotating wheel is positioned on the table surface of the workbench, and the clamping machine drives the pressure rod to move downward to press the bearing into the stop hole and enter the fixing hole.

9. A pressing device as claimed in claim 8, characterized in that: The end of the pressure rod facing the table is provided with a circle of limiting steps, so that the end of the pressure rod facing the table forms an inserting convex portion, and the inner ring of the bearing is sleeved outside the inserting convex portion.

10. A pressing device according to claim 9, characterized in that: One end of the pressure rod facing the table surface abuts against a convex portion, and the abutting convex portion abuts against an outer ring of the bearing.

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