Passive wheel set and crane

Abstract

The utility model discloses a driven wheel set and crane, including the frame, be provided with the mandrel seat on the frame, be provided with two the mandrel fixed by the mandrel seat of symmetrical arrangement, be provided with the wheel on the mandrel, be provided with the slot and be used for the round hole of mandrel seat pass on the frame, be provided with the mandrel seat on the frame, be provided with the mandrel seat on the mandrel fixed by the mandrel seat of symmetrical arrangement, be provided with the wheel on the mandrel fixed by the mandrel seat. One end of the open groove is communicated with the round hole, the other end of the open groove is communicated with the edge of the frame, the open groove is horizontally arranged, and the ground clearance of the center line of the open groove is consistent with the ground clearance of the axis of the mandrel; after the mandrel seat is detached, the mandrel is pushed in the opening direction of the open groove, the wheel rolls along the rail, the mandrel can be driven to horizontally slide out of the open groove, the structure is simple, operation is convenient, labor intensity can be lowered, and safety and reliability are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of cranes, in particular to a passive wheel set. In addition, the utility model also relates to a crane comprising the passive wheel set. Background Art

[0002] Cranes are machines that can lift heavy objects vertically and move them horizontally within a certain range. They are widely used in machinery manufacturing, metallurgy, mining, electricity, energy, ports and construction industries. The horizontal movement of cranes is inseparable from the wheel set. Due to the high working intensity of the crane, the wheels are worn out quickly. When the wheels are worn, they will cause rail gnawing, which not only increases the running resistance, but also generates vibration and noise. Therefore, it is necessary to regularly inspect and repair the wheels, bearings and other parts.

[0003] The existing wheel assembly is very troublesome to install and disassemble. The small vehicle frame or the end beam needs to be supported by a jack to repair or replace the wheel assembly. The operation is complicated, difficult and labor-intensive. Utility Model Content

[0004] The utility model provides a passive wheel group and a crane, so as to solve the technical problems that the maintenance or replacement of the existing passive wheel group is complicated, difficult and labor-intensive.

[0005] According to one aspect of the utility model, a passive wheel group is provided, including a frame, a spindle seat arranged on the frame, a spindle fixed by two symmetrically arranged spindle seats, and a wheel arranged on the spindle, the frame is provided with a slot and a circular hole for passing through the spindle seat, one end of the slot is connected to the circular hole, and the other end is connected to the edge of the frame, the slot is arranged horizontally, and the height of the center line of the slot above the ground is consistent with the height of the spindle axis above the ground.

[0006] Furthermore, the wheel is connected to the spindle via a bearing, and the spindle seat abuts against the bearing along the axial direction of the wheel.

[0007] Furthermore, the two bearings are arranged at intervals along the axial direction of the spindle, and a spacer ring is arranged between the two bearings.

[0008] Furthermore, the spindle seat includes a connecting plate for connecting to a frame and a cylinder for embedding the spindle, and the cylinder abuts against the bearing.

[0009] Furthermore, a centering boss is arranged on the spindle, and a centering hole adapted to the centering boss is opened on the connecting plate.

[0010] Furthermore, it also includes a transparent cover arranged along the radial plane of the wheel, the outer circumference of the transparent cover is connected to the wheel, the inner circumference is gap-matched with the cylinder, and a sealing ring for sealing the gap is arranged on the transparent cover and / or the cylinder.

[0011] Furthermore, it also includes an oil cup, the two transparent covers, the inner circle of the wheel, the outer circumference of the two cylinders and the spindle form a lubrication cavity, the oil cup is connected to the lubrication cavity, and the bearing is arranged in the lubrication cavity.

[0012] Further, the spindle seat is provided with a first oil circuit, a first end of the first oil circuit is connected to the oil cup, and a second end of the first oil circuit is connected to the lubrication cavity, or

[0013] A second oil circuit is arranged on the spindle, a first end of the second oil circuit is connected to the oil cup, and a third oil circuit for connecting the second end of the second oil circuit with the lubrication cavity is opened on the spacer ring.

[0014] Furthermore, the width of the slot in the vertical direction is 10 to 20 mm greater than the outer diameter of the mandrel.

[0015] According to another aspect of the utility model, a crane is provided, which comprises the above-mentioned passive wheel set.

[0016] The utility model has the following beneficial effects:

[0017] The passive wheel group of the utility model has a wheel arranged on a spindle, the spindle is connected to a frame through a spindle seat, a horizontally arranged slot is provided on the frame, the height of the center line of the slot from the ground is consistent with the height of the spindle axis from the ground, after the spindle seat is removed, the spindle is pushed along the opening direction of the slot, the wheel rolls along the track, and the spindle can be driven to slide out horizontally from the slot, the structure is simple, the operation is convenient, the labor intensity can be reduced, and it is safe and reliable.

[0018] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0020] Figure 1 This is a schematic structural diagram of a passive wheel group of a preferred embodiment of the utility model;

[0021] Figure 2 It is a structural schematic diagram of a frame of a preferred embodiment of the utility model;

[0022] Figure 3 It is a structural schematic diagram of a spindle seat of a preferred embodiment of the utility model;

[0023] Figure 4 It is a structural schematic diagram of the second oil circuit of the preferred embodiment of the utility model.

[0024] Legend:

[0025] 1. Frame; 11. Slot; 12. Round hole; 2. Spindle seat; 21. Connecting plate; 22. Cylinder; 23. Centering hole; 24. First oil circuit; 3. Spindle; 31. Centering boss; 32. Second oil circuit; 4. Wheel; 5. Bearing; 6. Spacer ring; 7. Transparent cover; 8. Sealing ring; 9. Oil cup. DETAILED DESCRIPTION

[0026] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. However, the present invention can be implemented in a variety of different ways as defined and covered below.

[0027] Please also read Figures 1 to 3 The passive wheel group of this embodiment includes a frame 1, a spindle seat 2 arranged on the frame 1, a spindle 3 fixed by two symmetrically arranged spindle seats 2, and a wheel 4 arranged on the spindle 3. The frame 1 is provided with a slot 11 and a circular hole 12 for passing through the spindle seat 2. One end of the slot 11 is connected to the circular hole 12, and the other end is connected to the edge of the frame 1. The slot 11 is arranged horizontally, and the height of the center line of the slot 11 from the ground is consistent with the height of the axis of the spindle 3 from the ground.

[0028] In the passive wheel group of this embodiment, the wheel 4 is arranged on the spindle 3, and the spindle 3 is connected to the frame 1 through the spindle seat 2. A horizontally arranged slot 11 is provided on the frame 1, and the height of the center line of the slot 11 from the ground is consistent with the height of the axis of the spindle 3 from the ground. After the spindle seat 2 is removed, the spindle 3 is pushed along the opening direction of the slot 11, and the wheel 4 rolls along the track, which can drive the spindle 3 to slide out horizontally from the slot 11. The structure is simple, the operation is convenient, the labor intensity can be reduced, and it is safe and reliable.

[0029] like Figure 1 and Figure 3 As shown, in this embodiment, the wheel 4 is connected to the spindle 3 through the bearing 5, the spindle seat 2 is in contact with the bearing 5 along the axial direction of the wheel 4, and the spindle 3 and the wheel 4 adopt a split structure, which can reduce the difficulty of processing on the one hand, and the bearing 5 is installed inside the wheel, which can reduce the weight of the wheel 4, thereby reducing the weight of the passive wheel set; on the other hand, the spindle 3 or the wheel 4 can be replaced separately, reducing the use cost. Optionally, the bearing 5 adopts a tapered roller bearing, which is suitable for large-tonnage wheelsets and has low cost.

[0030] like Figure 1 and Figure 3 As shown, in this embodiment, two bearings 5 ​​are arranged at intervals along the axial direction of the spindle 3, and a spacer ring 6 is arranged between the two bearings 5. Two sets of bearings 5 ​​are used to improve the load-bearing capacity of the wheel. The spacer ring 6 can separate the two bearings 5 ​​to prevent the two bearings 5 ​​from rubbing against each other.

[0031] like Figure 3 As shown, in this embodiment, the spindle seat 2 includes a connecting plate 21 for connecting to the frame 1 and a cylinder 22 for embedding the spindle 3. The cylinder 22 is in contact with the bearing 5. The cylinder 22 can center the spindle 3 on the one hand and axially position the bearing 5 on the other hand. The spindle seat 2 is an integrated structure with few parts, a simple structure, and easy disassembly and assembly.

[0032] like Figure 3 As shown, in this embodiment, a centering boss 31 is arranged on the spindle 3, and a centering hole 23 adapted to the centering boss 31 is opened on the connecting plate 21. During assembly, the spindle 3 and the wheel 4 can be lifted through the connecting plate 21 to avoid deformation of the cylinder 22 due to force, thereby ensuring stable operation of the wheel 4.

[0033] like Figure 1 As shown, in this embodiment, it also includes a transparent cover 7 arranged along the radial plane of the wheel 4, the outer circumference of the transparent cover 7 is connected to the wheel 4, the inner circumference is gap-matched with the cylinder 22, and a sealing groove is provided on the end surface of the transparent cover 7 facing the cylinder 22, and a sealing ring 8 is arranged in the sealing groove to prevent foreign matter from entering the bearing; it can be understood that the sealing groove can also be provided on the outer cylindrical surface of the cylinder 22, and the sealing ring 8 is arranged in the sealing groove and matched with the end surface of the transparent cover 7 facing the cylinder 22, so as to achieve the same sealing effect.

[0034] like Figure 1 As shown, in this embodiment, an oil cup 9 is also included. Two transparent covers 7, the inner circle of the wheel 4, the outer circumference of the two cylinders 22 and the spindle 3 form a lubrication cavity. The oil cup 9 is connected to the lubrication cavity. The bearing 5 is arranged in the lubrication cavity, which can lubricate the bearing 5, reduce wear and increase service life.

[0035] like Figure 1 and Figure 3 As shown, in this embodiment, the spindle seat 2 is provided with a first oil circuit 24, the first end of the first oil circuit 24 is connected to the oil cup 9, and the second end is connected to the lubrication chamber. The structure is simple, does not damage the structure of the spindle 3, and is suitable for a passive wheel group with a smaller outer diameter of the spindle 3.

[0036] like Figure 4As shown, in this embodiment, a second oil circuit 32 is arranged on the spindle 3, a first end of the second oil circuit 32 is connected to the oil cup 9, and a third oil circuit for connecting the second end of the second oil circuit 32 and the lubrication chamber is opened on the spacer ring 6. The structure is simple, does not destroy the structure of the cylinder 22, and is suitable for a passive wheel group with a larger outer diameter of the spindle 3.

[0037] like Figure 2 As shown, in this embodiment, the width W of the slot 11 in the vertical direction is 10 to 20 mm larger than the outer diameter D of the spindle 3. In order to ensure the supporting strength of the frame 1, the width W of the slot 11 is as small as possible. However, when the difference between the width W and the outer diameter D is less than 10 mm, the requirement for the spindle 3 to align with the slot 11 is high, which increases the difficulty of assembly; when it is greater than 20 mm, the supporting strength of the frame 1 may be affected.

[0038] A crane comprises the above-mentioned passive wheel set.

[0039] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A passive wheel set, characterized in that: The vehicle comprises a frame (1), a spindle seat (2) arranged on the frame (1), a spindle (3) fixed by two symmetrically arranged spindle seats (2), and a wheel (4) arranged on the spindle (3). The frame (1) is provided with a slot (11) and a circular hole (12) for passing the spindle seat (2); one end of the slot (11) is connected to the circular hole (12), and the other end is connected to the edge of the frame (1). The slot (11) is arranged horizontally, and the height of the center line of the slot (11) from the ground is consistent with the height of the axis of the spindle (3) from the ground.

2. The passive wheel assembly according to claim 1, characterized in that: The wheel (4) is connected to the spindle (3) via a bearing (5), and the spindle seat (2) abuts against the bearing (5) along the axial direction of the wheel (4).

3. The passive wheel assembly according to claim 2, characterized in that: The two bearings (5) are arranged at intervals along the axial direction of the spindle (3), and a spacing ring (6) is arranged between the two bearings (5).

4. The passive wheel assembly according to claim 3, characterized in that: The spindle seat (2) comprises a connecting plate (21) for connecting to the frame (1) and a cylinder (22) for embedding the spindle (3), and the cylinder (22) is in contact with the bearing (5).

5. The passive wheel assembly according to claim 4, characterized in that: The spindle (3) is provided with a centering boss (31), and the connecting plate (21) is provided with a centering hole (23) adapted to the centering boss (31).

6. The passive wheel assembly according to claim 4 or 5, characterized in that: It also comprises a transparent cover (7) arranged along the radial plane of the wheel (4), the outer circumference of the transparent cover (7) being connected to the wheel (4), the inner circumference being gap-matched with the cylinder (22), and a sealing ring (8) for sealing the gap being arranged on the transparent cover (7) and / or the cylinder (22).

7. The passive wheel assembly according to claim 6, characterized in that: It also includes an oil cup (9), the two transparent covers (7), the inner circle of the wheel (4), the outer circumference of the two cylinders (22) and the spindle (3) form a lubrication cavity, the oil cup (9) is connected to the lubrication cavity, and the bearing (5) is arranged in the lubrication cavity.

8. The passive wheel assembly according to claim 7, characterized in that: The spindle seat (2) is provided with a first oil passage (24), a first end of the first oil passage (24) is connected to the oil cup (9), and a second end is communicated with the lubrication cavity, or A second oil circuit (32) is arranged on the spindle (3), a first end of the second oil circuit (32) is connected to the oil cup (9), and a third oil circuit for connecting the second end of the second oil circuit (32) with the lubrication cavity is opened on the spacer ring (6).

9. The passive wheel assembly according to claim 1, characterized in that: The width of the slot (11) in the vertical direction is 10 to 20 mm greater than the outer diameter of the mandrel (3).

10. A crane, characterized in that: A passive wheel assembly comprising any one of claims 1 to 9.

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