Bearing sleeve seat of crown block of clamping machine

Abstract

The utility model provides a bearing sleeve seat of an object clamping machine crown block. The bearing sleeve seat comprises an inner shaft sleeve made of plastic and a bearing body. The inner shaft sleeve comprises a sleeve part surrounding the penetrating groove and a plurality of embedded block parts arranged on the peripheral face of the sleeve part in a protruding mode in the radial direction. The outer diameter of the sleeve part is gradually increased in the axial direction, and the inner diameter of the sleeve part is equal in the axial direction. The thickness of each embedded block part in the radial direction is gradually reduced in the axial direction, and the sum of the thickness of the embedded block parts in the radial direction and the thickness of the sleeve part in the radial direction is equal in the axial direction. The bearing body comprises a shaft tube part and a head end part, wherein the shaft tube part is used for embedding the inner shaft sleeve and extends in the axial direction, and the head end part is arranged on the peripheral face of the shaft tube part in a surrounding mode. The inner shaft sleeve is made of plastic so as to be beneficial to attachment of lubricating oil, meanwhile, the bearing body can be made of metal or other materials with high rigidity, and therefore the structural strength is improved.

Description

Technical Field

[0001] This utility model relates to a bushing on a drive shaft, and more particularly to a two-piece bearing housing used on the drive shaft of a clamping machine crane. Background Technology

[0002] See Figure 1 The conventional gripper crane is mounted on two horizontally extending guide rods (not shown) in the gripper. The gripper crane includes a base plate 11, two bearing sleeves 12 spaced apart from each other, two drive shafts 13 pivotally passing through the bearing sleeves 12, four wheels 14 arranged in pairs on the drive shafts 13, two drive gears 15 arranged on the drive shafts 13 and each adjacent to one of the wheels 14, a wire feed wheel 16 arranged on one of the drive shafts 13 for connecting the gripper device (not shown), and two power sources 17 arranged on the base plate 11 and controllable to drive the drive gears 15 respectively.

[0003] Two wheels 14, each mounted on a drive shaft 13, are located on opposite sides of the base plate 11 and are respectively mounted on the guide rod in a rolling contact with it. The drive shaft 13 without the wire feed wheel 16 is fixedly connected to the wheel 14 and can rotate synchronously. The drive shaft 13 with the wire feed wheel 16 is pivotally connected to the wheel 14 and can rotate relative to it, and is also fixedly connected to the wire feed wheel 16 and can rotate synchronously. One of the power sources 17 can drive the corresponding drive gear 15 to rotate the drive shaft 13 and the wire feed wheel 16. By bidirectionally winding the wire feed wheel 16, the gripper device can move up and down. The other power source 17 can drive the corresponding drive gear 15 to rotate another drive shaft 13 and the two wheels 14 mounted on it, thereby moving the wheels 14 on the guide rod. At this time, the two wheels 14 on the other drive shaft 13 will rotate relative to the drive shaft 13, thus passively moving on the guide rod.

[0004] See Figure 1 and Figure 2Generally, each bearing housing 12 is integrally molded from metal or plastic. The bearing housing 12 includes a shaft tube portion 121 that passes through the base plate 11 and is fitted onto a corresponding drive shaft 13, and a head 122 integrally connected to one end of the shaft tube portion 121 with a diameter larger than that of the shaft tube portion 121. To allow the drive shaft 13 to rotate relative to it, lubricating oil is applied to the inner surface of the shaft tube portion 121 that contacts the drive shaft 13. When the bearing housing 12 is made of metal, the lubricating oil does not easily adhere to the inner surface, thus requiring frequent replenishment. When the bearing housing 12 is made of plastic, it suffers from insufficient rigidity. Utility Model Content

[0005] The purpose of this invention is to provide a bearing housing that can overcome the above-mentioned problems.

[0006] The present invention relates to a bearing housing for a clamping crane, wherein the bearing housing includes an inner bushing made of plastic and a bearing body. The inner bushing includes a sleeve portion surrounding a through groove and a plurality of insert portions radially protruding from the outer circumferential surface of the sleeve portion and arranged in annular intervals at equal angles to each other. The outer diameter of the sleeve portion gradually increases axially, and the inner diameter of the sleeve portion is equal axially. The thickness of each insert portion gradually decreases axially, and the sum of the radial thicknesses of the insert portion and the sleeve portion is equal axially. The bearing body includes a shaft tube portion for the inner bushing to be inserted and extending axially, and a head end portion surrounding the outer circumferential surface of the shaft tube portion and protruding radially outward. The shaft tube portion defines a groove for the inner bushing to be inserted.

[0007] The bearing housing of the overhead crane of the clamping machine of this utility model is wherein the bearing body is made of metal.

[0008] The bearing housing of the overhead crane of the clamping machine of this utility model, wherein the groove of the shaft tube has a conical groove segment for the sleeve portion of the inner shaft sleeve to be embedded and a plurality of strip-shaped groove segments that connect the conical groove segment and are respectively for the insert portion to be embedded. The two ends of the conical groove segment are open, and the two ends of each strip-shaped groove segment are open.

[0009] The bearing housing of the overhead crane of the clamping machine of this utility model, wherein the sleeve portion of the inner bushing is in the shape of a frustum conical body, the space of the conical groove segment of the insert corresponds to the outer shape of the sleeve portion, each insert portion is in the shape of a right trapezoid, and the space of each strip groove segment corresponds to the outer shape of the insert portion.

[0010] The beneficial effects of this invention are as follows: the inner bushing is made of plastic, which facilitates the adhesion of lubricating oil, thereby ensuring sufficient lubrication between the inner bushing and the drive shaft it is fitted with. Simultaneously, the bearing body can be made of metal or other materials with high rigidity, and in conjunction with the insert portion which acts as a reinforcing rib, it can enhance the structural strength, thus reducing the frequency of maintenance and replacement, and improving operational stability and smoothness. The bearing body also provides protection for the inner bushing. Furthermore, the inner bushing is generally shaped like a frustum of a cone, allowing the smaller outer diameter end to be easily inserted into the groove and positioned. Once the inner bushing is positioned, it is limited by the bearing body and cannot move further, facilitating assembly and preventing the inner bushing and bearing body from detaching. Attached Figure Description

[0011] Figure 1 This is a 3D diagram illustrating a traditional overhead crane with a clamping mechanism;

[0012] Figure 2 This is a 3D diagram illustrating a traditional bearing housing;

[0013] Figure 3 This is an exploded perspective view illustrating an embodiment of the bearing sleeve of the overhead crane of the clamping machine of this utility model;

[0014] Figure 4 This is a side sectional view, indicating... Figure 3 Side cross-sectional view;

[0015] Figure 5 and Figure 6 All are three-dimensional drawings, illustrating the overhead crane with gripping mechanism of this utility model; and

[0016] Figure 7 This is a partial side sectional view, illustrating... Figure 5 A cross-sectional view of a portion of it. Detailed Implementation

[0017] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0018] See Figure 3 and Figure 4An embodiment of the bearing housing of the overhead crane of this utility model includes an inner bushing 2 and a bearing body 3 for the inner bushing 2 to be fitted. The inner bushing 2 is made of plastic and includes a sleeve portion 21 surrounding a through groove 211 and four insert portions 22 that are radially protruding from the outer circumference of the sleeve portion 21 and arranged in a ring at equal angles (90 degrees) to each other. The outer diameter A of the sleeve portion 21 gradually increases along the axial direction, and the inner diameter B of the sleeve portion 21 is equal along the axial direction. In other words, the overall outline of the sleeve portion 21 is generally shaped like a frustum of a cone, but the through groove 211 it surrounds is still a cylindrical hole with an equal diameter along the axial direction. The thickness C of each insert portion 22 in the radial direction gradually decreases along the axial direction, which makes the cross-section of the insert portion 22 in the circumferential direction generally a long strip of right-angled trapezoid. The total radial thickness D of the insert portion 22 and the sleeve portion 21 is equal in value along the axial direction. That is, the end of the insert portion 22 with a larger radial thickness C corresponds to the end of the sleeve portion 21 with a smaller outer diameter A, and vice versa. For clarity and to distinguish it from the sleeve portion 21, therefore... Figure 4 The insert portion 22 is not shown in cross-section.

[0019] The bearing body 3 is made of a metal such as copper and includes a shaft tube portion 31 extending axially and defining a groove 311 for the inner bushing 2 to be fitted, and a head end portion 32 surrounding the outer circumferential surface of the shaft tube portion 31 and protruding radially outward. The groove 311 has a tapered groove segment 312 for the sleeve portion 21 of the inner bushing 2 to be fitted, and four strip-shaped groove segments 313 connecting the tapered groove segment 312 and respectively for the insert portion 22 to be fitted. Both ends of the tapered groove segment 312 and each strip-shaped groove segment 313 are open. The tapered groove segment 312 corresponds to the shape of the sleeve portion 21, so that the space of the tapered groove segment 312 is shaped like a frustum of a cone. Each strip-shaped groove segment 313 corresponds to the shape of one of the insert portions 22, so that the space of the strip-shaped groove segment 313 is shaped like a right trapezoid.

[0020] See Figure 5 , Figure 6 as well as Figure 7The overhead crane 4 includes a base plate 41, a positioning seat 42 fixed to the base plate 41 and spaced apart from the base plate 41, two drive shafts 43 passing through the base plate 41 and the positioning seat 42, four wheels 44 arranged in pairs at opposite ends of the drive shafts 43, and two drive gears 45 respectively arranged on the drive shafts 43 and each adjacent to one of the wheels 44. A sleeve portion 21 is fitted onto one of the drive shafts 43, a shaft tube portion 31 passes through the positioning seat 42 and abuts against one of the drive gears 45, and a head end portion 32 is confined between the base plate 41 and the positioning seat 42. Because the inner bushing 2 is made of plastic, the inner surface of the sleeve portion 21, which slides in contact with the drive shaft 43, can adhere to a greater amount of lubricating oil, thereby achieving better lubrication and reducing the frequency of downtime for oil replenishment or maintenance, and improving operational stability and smoothness. The bearing body 3 is made of metal, which can help the inner bushing 2 dissipate heat to withstand high-temperature working environments. In addition, the insert part 22, which can serve as a reinforcing rib, can also strengthen the structural strength, enabling the clamping machine to grip heavier items.

[0021] See Figure 3 , Figure 4 as well as Figure 5 On the other hand, the inner bushing 2 is generally shaped like a frustum of a cone, which allows it to be easily inserted into and positioned in the groove 311 at its smaller outer diameter end. Once positioned, the inner bushing 2 is restrained by the bearing body 3 and cannot move further. This design facilitates rapid assembly and prevents mistaken insertion. Furthermore, the base plate 41 has an opening 46 through which the drive shaft 43 passes. The diameter of the opening 46 is typically larger than the maximum outer diameter of the inner bushing 2. However, through the aforementioned positioning design, it is ensured that the inner bushing 2 will not move away from the drive gear 45 through the opening 46 during operation, preventing displacement of the end of the inner bushing 2 away from the drive gear 45 due to lack of restraint.

[0022] In summary, the inner bushing 2 is made of plastic, which facilitates the adhesion of lubricating oil, thereby ensuring sufficient lubrication between the inner bushing 2 and the drive shaft 43 it is fitted with. Meanwhile, the bearing body 3 is made of metal, and in conjunction with the insert portion 22, which acts as a reinforcing rib, it effectively strengthens the structure, reducing the frequency of maintenance and replacement, and improving operational stability and smoothness. Furthermore, the inner bushing 2 is generally shaped like a frustum of a cone, allowing its smaller outer diameter end to be easily inserted into and positioned in the groove 311. Once positioned, the inner bushing 2 is restrained by the bearing body 3 and cannot move further, facilitating assembly and preventing the inner bushing 2 and bearing body 3 from detaching. Therefore, the purpose of this utility model is indeed achieved.

Claims

1. A bearing sleeve for a clamping crane, characterized in that, The bearing housing includes an inner bushing made of plastic and a bearing body. The inner bushing includes a sleeve portion surrounding a through groove and a plurality of insert portions radially protruding from the outer circumferential surface of the sleeve portion and arranged in annular intervals at equal angles. The outer diameter of the sleeve portion gradually increases axially, and the inner diameter of the sleeve portion is equal axially. The thickness of each insert portion gradually decreases axially, and the sum of the radial thicknesses of the insert portions and the sleeve portion is equal axially. The bearing body includes a shaft tube portion for the inner bushing to be inserted and extending axially, and a head end portion surrounding the outer circumferential surface of the shaft tube portion and protruding radially outward. The shaft tube portion defines a groove for the inner bushing to be inserted.

2. The bearing sleeve of the overhead crane for the clamping machine according to claim 1, characterized in that, The bearing body is made of metal.

3. The bearing sleeve of the overhead crane for the clamping machine according to claim 1, characterized in that, The groove of the shaft tube has a conical groove segment for the sleeve portion of the inner shaft sleeve to be inserted and a plurality of strip-shaped groove segments that connect the conical groove segment and are respectively inserted by the insert portion. The two ends of the conical groove segment are open, and the two ends of each strip-shaped groove segment are open.

4. The bearing sleeve of the overhead crane for the clamping machine according to claim 3, characterized in that, The inner bushing has a sleeve portion in the shape of a frustum cone, and the space of the conical groove segment of the insert corresponds to the shape of the sleeve portion. Each insert portion is in the shape of a right trapezoid, and the space of each strip groove segment corresponds to the shape of the insert portion.

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