Self-uniform-load sliding bearing wheel set

Abstract

The invention relates to a self-uniform-load sliding bearing wheel set which comprises two T-shaped side frames, a swing frame body and a supporting wheel, rotating holes are formed in the middles of the T-shaped side frames, a first sliding bearing is arranged in the rotating holes, the swing frame body comprises a frame body and end shafts connected to the two sides of the frame body, the two T-shaped side frames are oppositely arranged, and the supporting wheel is arranged between the two T-shaped side frames. Two end shafts of the swinging frame body are respectively connected with the two first sliding bearings in an inserting manner, so that the swinging frame body can swing relative to the two T-shaped side frames; a vertically-through mounting cavity is formed in the frame body, the supporting wheel is mounted in the mounting cavity, and the axis of the supporting wheel is perpendicular to the axis of the end shaft; the T-shaped side frame and the swing frame body are both made of aluminum alloy materials. An additional degree of freedom can be given to the wheel set in the lateral deviation direction, so that deformation of the rack cannot be transmitted to the supporting wheels, the stress of the supporting wheels is always kept in the radial direction, and self-uniform loading is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical engineering, and in particular relates to a self-load-balancing sliding bearing wheel set. Background Art

[0002] Large equipment needs to be transported by mobile trolleys for magnetic testing. Due to the magnetic requirements, the mobile trolley must use an aluminum alloy frame and a copper alloy sliding bearing wheel set. Due to the concentrated load force of the equipment, the frame is easily deformed and causes the wheel set to have a side slip angle and cause local wear of the sliding bearing. It is necessary to design a wheel set that does not deform or deflect with the frame to achieve automatic load balancing of the sliding bearing and avoid abnormal noise and jamming caused by local wear. Summary of the invention

[0003] In view of this, the present invention provides a self-load balancing sliding bearing wheel group, which can give the wheel group an additional degree of freedom in the lateral deviation direction, so that the deformation of the frame cannot be transmitted to the supporting wheel, and the force on the supporting wheel is always maintained in its radial direction, thereby achieving self-load balancing.

[0004] The technical solution adopted by the present invention is:

[0005] A self-load-balancing sliding bearing wheel set, comprising two T-shaped side frames, a swing frame and a supporting wheel, wherein a rotation hole is provided in the middle of the T-shaped side frame, a first sliding bearing is provided in the rotation hole, the swing frame comprises a frame and end shafts connected to both sides of the frame, the two T-shaped side frames are arranged opposite to each other, and the two end shafts of the swing frame are respectively plug-connected to the two first sliding bearings, so that the swing frame can swing relative to the two T-shaped side frames;

[0006] The frame body is formed with an installation cavity which passes through from top to bottom, the support wheel is installed in the installation cavity, and the axis of the support wheel is perpendicular to the axis of the end shaft;

[0007] The T-shaped side frame and the swing frame are both made of aluminum alloy.

[0008] Preferably, the T-shaped side frame comprises a side frame and a mounting frame, the mounting frame is slidably inserted into the upper side of the side frame, the upper side of the mounting frame forms a mounting surface, and the rotating hole is formed in the side frame.

[0009] Preferably, a mounting groove is provided on the mounting surface, the mounting groove passes through the mounting frame from top to bottom, a rubber spring is provided in the mounting groove, and in a natural state, the thickness of the rubber spring is greater than the thickness of the mounting groove, the lower surface of the rubber spring contacts the top surface of the side frame, and the upper surface of the rubber spring is flush with the mounting surface.

[0010] Preferably, a plurality of pins are provided on the mounting surface for interference fit with the frame.

[0011] Preferably, a plurality of the pins are arranged around the mounting slot.

[0012] Preferably, the mounting frame is provided with two first through holes, the side frame is provided with two second through holes, the two first through holes are respectively located on the left and right sides of the mounting slot, and the two first through holes are vertically aligned with the two second through holes;

[0013] The T-shaped side frame also includes two preload bolts, which correspond to the two first through holes. The preload bolts pass through the first through hole and the second through hole from top to bottom in sequence to control the compression amount of the rubber spring and are preloaded and locked through double nuts.

[0014] Preferably, two limiting rings are connected to a side of the side frame facing the frame body, and the two limiting rings are respectively located on the left and right sides of the frame body to limit the left and right swing amplitude of the swing frame body.

[0015] Preferably, the support wheel includes a wheel axle, a second sliding bearing, and a rubber-coated wheel hub. The second sliding bearing is sleeved on the outside of the wheel axle, and the rubber-coated wheel hub is sleeved on the outside of the second sliding bearing. Connecting holes are respectively provided on the left and right side walls of the frame, and the two ends of the wheel axle pass through the two connecting holes respectively.

[0016] Beneficial effects of the present invention:

[0017] In actual application, the T-shaped side frame is connected to the frame to form a mobile trolley. The T-shaped side frame can swing relative to the swing frame. The supporting wheels on the swing frame are in contact with the slide rails, and the supporting wheels are basically in a vertical state. Therefore, when the frame is deformed, the deformation energy is transmitted to the sliding bearing wheel group, causing the T-shaped side frame to deflect. Since the T-shaped side frame is rotatably connected to the swing frame, the swing frame will not deflect with the T-shaped side frame, so that the supporting wheels will only be subjected to radial forces at all times, thereby achieving the purpose of self-load balancing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and other objects, features and advantages of the present invention will become more apparent through the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

[0019] Figure 1 It is a structural schematic diagram of a self-load-balancing sliding bearing wheel set;

[0020] Figure 2 It is a structural diagram of a T-shaped side frame in one direction;

[0021] Figure 3 This is a schematic diagram of the structure of the T-shaped side frame in another direction;

[0022] Figure 4 It is a structural schematic diagram of a swing frame;

[0023] Figure 5 It is a structural schematic diagram of the support wheel.

[0024] In the figure: 1. T-shaped side frame; 2. swing frame; 3. support wheel;

[0025] 11. Mounting frame; 12. Side frame; 13. First sliding bearing; 14. Preload bolt; 15. Double nut; 16. Pin; 17. Rubber spring; 18. Limiting ring;

[0026] 21. Frame; 22. End shaft; 23. Shaft end retaining ring; 24. Thrust washer;

[0027] 31. Wheel axle; 32. Second sliding bearing; 33. Side thrust washer; 34. Rubber-coated wheel hub; 35. Locking retaining ring. DETAILED DESCRIPTION

[0028] The present invention is described below based on embodiments, but the present invention is not limited to these embodiments. In the following detailed description of the present invention, some specific details are described in detail. In order to avoid confusing the essence of the present invention, known methods, processes, procedures, and components are not described in detail.

[0029] In addition, persons of ordinary skill in the art will appreciate that the drawings provided herein are for illustration purposes and are not necessarily drawn to scale.

[0030] Unless the context clearly requires otherwise, throughout the specification and claims, the words "include", "comprising" and similar words should be interpreted in an inclusive sense rather than an exclusive or exhaustive sense; that is, in the sense of "including but not limited to".

[0031] In the description of the present invention, it should be understood that the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0032] See also Figure 1-Figure 5 The present invention provides a self-load-balancing sliding bearing wheel set (hereinafter referred to as "bearing wheel set"), comprising two T-shaped side frames 1, a swing frame 2 and a supporting wheel 3, wherein a rotating hole is provided in the middle of the T-shaped side frame 1, a first sliding bearing 13 is provided in the rotating hole, the swing frame 2 comprises a frame 21 and end shafts 22 connected to both sides of the frame 21, the two T-shaped side frames 1 are arranged opposite to each other, and the two end shafts 22 of the swing frame 2 are respectively plug-connected with the two first sliding bearings 13, so that the swing frame 2 can swing relative to the two T-shaped side frames 1;

[0033] The frame 21 is formed with an installation cavity which passes through from top to bottom, and the support wheel 3 is installed in the installation cavity, and the axis of the support wheel 3 is perpendicular to the axis of the end shaft 22;

[0034] The T-shaped side frame 1 and the swing frame 2 are both made of aluminum alloy.

[0035] The bearing wheel assembly of the present invention is applied to a mobile trolley. Specifically, four bearing wheel assemblies can be installed at the four corners of a frame to form a mobile trolley. During installation, the T-shaped side frame 1 is connected to the frame to achieve the purpose of connecting the bearing wheel assembly to the frame.

[0036] In order to meet the purpose of magnetic detection, the T-shaped side frame 1 and the swing frame 2 are made of aluminum alloy. The frame is also made of aluminum alloy. Due to the low hardness of aluminum alloy, frame deformation is inevitable under large loads. The deformed frame transfers the deformation to the bearing wheel group, and further transfers the eccentric load to the second sliding bearing 32 (inside the support wheel 3). The copper material of the second sliding bearing 32 has a low hardness, and local wear is inevitable under the action of eccentric load and affects the function of the equipment.

[0037] In the present invention, the T-shaped side frame 1 can swing relative to the swing frame 2, and the support wheel 3 on the swing frame 2 is in contact with the slide rail, and the support wheel 3 is basically in a vertical state. Therefore, when the frame is deformed, the deformation energy is transmitted to the sliding bearing wheel group, causing the T-shaped side frame 1 to deflect. Since the T-shaped side frame 1 is rotationally connected to the swing frame 2, the swing frame 2 will not deflect with the T-shaped side frame 1, so that the support wheel 3 will always only be subjected to the radial force, thereby achieving the purpose of self-load balance.

[0038] The T-shaped side frame 1 includes a side frame 12 and a mounting frame 11 . The mounting frame 11 is slidably inserted into the upper side of the side frame 12 . The upper side of the mounting frame 11 forms a mounting surface, and the rotating hole is formed in the side frame 12 .

[0039] The mounting frame 11 is on the top and the side frame 12 is on the bottom. The mounting frame 11 can slide up and down relative to the side frame 12. When connected to the vehicle frame, the mounting surface is attached to and connected with the bottom surface of the vehicle frame.

[0040] The mounting surface is provided with a mounting groove, which passes through the mounting frame 11 from top to bottom. A rubber spring 17 is provided in the mounting groove. In a natural state, the thickness of the rubber spring 17 is greater than the thickness of the mounting groove. The lower surface of the rubber spring 17 contacts the top surface of the side frame 12, and the upper surface of the rubber spring 17 is flush with the mounting surface.

[0041] The mounting surface is provided with a plurality of pins 16 for interference fit with the frame.

[0042] A plurality of pins 16 are arranged around the installation slot. For example, three pins 16 are arranged on the front and rear sides of the installation slot respectively.

[0043] The mounting surface fits the frame so that the frame closes the mounting groove from the upper side. The mounting frame 11 is connected to the frame by a pin 16, so that the relative position between the mounting frame 11 and the frame is fixed. Since the thickness of the rubber spring 17 is greater than the thickness of the mounting groove, in a natural state, part of the rubber spring 17 will extend out of the mounting groove from the lower side, and the lower surface of the rubber spring 17 will contact the top surface of the side frame 12, so that the side frame 12 and the frame are elastically floatingly connected. When the cargo loaded on the frame is heavy, the rubber spring 17 will be flattened to provide a certain elastic force, so that the mobile trolley is more stable when moving.

[0044] The mounting frame 11 is provided with two first through holes, and the side frame 12 is provided with two second through holes, the two first through holes are respectively located on the left and right sides of the mounting slot, and the two first through holes are vertically aligned with the two second through holes;

[0045] The T-shaped side frame 1 also includes two preload bolts 14, which correspond to the two first through holes. The preload bolts 14 pass through the first through hole and the second through hole from top to bottom in sequence to control the compression amount of the rubber spring 17, and are preloaded and locked through the double nuts 15.

[0046] When forming the mobile trolley, the head of the preload bolt 14 is located on the upper side of the frame bottom plate, so when it is locked, the frame will move downward, shortening the distance between the frame (mounting frame 11) and the side frame 12 bracket, so that the rubber spring 17 can be pre-compressed to a certain thickness.

[0047] When loading goods, under a certain weight, the rubber spring 17 will not be compressed, so that the mobile trolley is relatively stable and the mobile trolley will not be deformed during use.

[0048] When the cargo exceeds the average wheel load, the spring rubber will be further compressed to achieve load balancing; when the cargo exceeds the maximum wheel load, the top of the side frame 12 is in rigid contact with the bottom of the mounting frame 11, the spring rubber is protected, and further deformation of the frame is limited.

[0049] Two limiting rings 18 are connected to one side of the side frame 12 facing the frame body 21 . The two limiting rings 18 are respectively located on the left and right sides of the frame body 21 to limit the swing range of the swing frame body 2 .

[0050] The support wheel 3 includes a wheel axle 31, a second sliding bearing 32, and a rubber-coated wheel hub 34. The second sliding bearing 32 is sleeved on the outside of the wheel axle 31, and the rubber-coated wheel hub 34 is sleeved on the outside of the second sliding bearing 32. The left and right side walls of the frame 21 are respectively provided with connecting holes, and the two ends of the wheel axle 31 pass through the two connecting holes respectively.

[0051] A square through hole (installation cavity) is provided in the middle of the frame 21 in the up-down direction to accommodate the supporting wheel 3, and a circular connection hole is provided on the left and right sides of the frame 21 to install the wheel axle 31. The end shaft 22 is located at the front and rear ends of the frame 21, and is integrally formed to ensure the rigidity of the parts. The end shaft 22 is installed with a T-shaped side frame 1 and thrust washers 24 are provided on the front and rear sides to reduce friction. The T-shaped side frame 1 is fixed to the end shaft 22 through the shaft end retaining ring 23.

[0052] The support wheel 3 is composed of a rubber-coated hub 34, a second sliding bearing 32, a side thrust washer 2433, a wheel axle 31 and a locking retaining ring 35. A high-hardness polyurethane rubber layer is sintered on the outer edge of the hub for vibration and noise reduction during the movement of the mobile trolley, and a second sliding bearing 32 (copper alloy second sliding bearing 32) is inlaid on the inner edge of the hub. The rubber-coated hub 34 is inserted into the wheel axle 31 through the second sliding bearing 32. A lubrication channel is provided on the wheel axle 31 and connected to the lubrication groove of the second sliding bearing 32 for grease lubrication. After the hub and axle 31 are installed in the swing frame 2 assembly, locking retaining rings 35 are used to tighten the two ends of the wheel axle 31.

[0053] It should be understood that the above-mentioned embodiments are merely illustrative and not restrictive. Without departing from the basic principles of the present invention, various obvious or equivalent modifications or substitutions that can be made by those skilled in the art to the above-mentioned details will all be included in the scope of the claims of the present invention.

Claims

1. A self-load-balancing sliding bearing wheel set, characterized in that: It comprises two T-shaped side frames, a swing frame and a supporting wheel, wherein a rotating hole is provided in the middle of the T-shaped side frame, a first sliding bearing is provided in the rotating hole, the swing frame comprises a frame and end shafts connected to both sides of the frame, the two T-shaped side frames are arranged opposite to each other, and the two end shafts of the swing frame are respectively connected with the two first sliding bearings by insertion, so that the swing frame can swing relative to the two T-shaped side frames; The frame body is formed with an installation cavity which passes through from top to bottom, the support wheel is installed in the installation cavity, and the axis of the support wheel is perpendicular to the axis of the end shaft; The T-shaped side frame and the swing frame are both made of aluminum alloy.

2. The self-load-balancing sliding bearing wheel assembly according to claim 1, characterized in that: The T-shaped side frame comprises a side frame and a mounting frame. The mounting frame is slidably inserted into the upper side of the side frame. The upper side of the mounting frame forms a mounting surface. The rotating hole is formed in the side frame.

3. The self-load balancing sliding bearing wheel assembly according to claim 2, characterized in that: The mounting surface is provided with a mounting groove, the mounting groove passes through the mounting frame from top to bottom, a rubber spring is provided in the mounting groove, in a natural state, the thickness of the rubber spring is greater than the thickness of the mounting groove, the lower surface of the rubber spring contacts the top surface of the side frame, and the upper surface of the rubber spring is flush with the mounting surface.

4. The self-load-balancing sliding bearing wheel assembly according to claim 3, characterized in that: The mounting surface is provided with a plurality of pins for interference fit with the frame.

5. The self-load-balancing sliding bearing wheel assembly according to claim 4, characterized in that: A plurality of pins are arranged around the mounting slot.

6. The self-load-balancing sliding bearing wheel assembly according to claim 5, characterized in that: The mounting frame is provided with two first through holes, and the side frame is provided with two second through holes, the two first through holes are respectively located on the left and right sides of the mounting slot, and the two first through holes are vertically aligned with the two second through holes; The T-shaped side frame also includes two preload bolts, which correspond to the two first through holes. The preload bolts pass through the first through hole and the second through hole from top to bottom in sequence to control the compression amount of the rubber spring and are preloaded and locked through double nuts.

7. The self-load-balancing sliding bearing wheel assembly according to any one of claims 2 to 6, characterized in that: The side frame is connected to two limiting rings on one side facing the frame body, and the two limiting rings are respectively located on the left and right sides of the frame body to limit the left and right swinging amplitude of the swing frame body.

8. The self-load balancing sliding bearing wheel assembly according to any one of claims 1 to 6, characterized in that: The supporting wheel includes a wheel axle, a second sliding bearing, and a rubber-coated wheel hub. The second sliding bearing is sleeved on the outside of the wheel axle, and the rubber-coated wheel hub is sleeved on the outside of the second sliding bearing. Connecting holes are respectively provided on the left and right side walls of the frame, and the two ends of the wheel axle pass through the two connecting holes respectively.

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