High-load special universal wheel support

Abstract

A high-load special universal wheel support comprises a seat plate, a wheel shaft and a support body, the seat plate and the support body are arranged in an up-down stacked mode, the wheel shaft sequentially penetrates through the seat plate and the support body from top to bottom and is fixed together through a screwing nut at the end of the wheel shaft, and the wheel shaft is sequentially divided into a plurality of shaft steps from top to bottom. And the wheel shaft is matched with the seat plate and the bracket body through a plurality of shaft steps. According to the utility model, the parts are installed and matched more tightly and stably, the operation is safer and more stable, the service life is longer, and the application range is wider.

Description

Technical Field

[0001] The utility model belongs to the technical field of universal wheels, and in particular relates to a bracket for supporting the universal wheel to rotate smoothly under high load. Background Art

[0002] A universal wheel is a so-called movable caster. Its structure can rotate 360 ​​degrees horizontally under dynamic or static load. It is widely used in many industries and fields such as mining, mechanical equipment, warehousing and logistics, home travel, etc. Taking home travel as an example, a universal wheel is often installed at the bottom of a suitcase and used as a pulley, but the existing universal wheel axles are mostly straight rods with the same upper and lower radial dimensions. When the universal wheel is used for too long or works under high load with too much load, the fit between the axle and the bracket body is easy to loosen, so that the bracket body no longer makes a standard 360-degree rotation around the axle, and shaking occurs between the two. The bracket body becomes eccentric rotation, and the rotation of the universal wheel is no longer stable, which in turn affects the smooth operation of the carrier above it. When used on a suitcase, the operation of the suitcase will no longer be safe and stable, which brings great inconvenience to people's safe travel and cargo transportation. At the same time, the unstable fit between the axle and the bracket body also seriously affects the service life of the universal wheel, reducing its scope of application and economic benefits. Utility Model Content

[0003] The utility model aims to provide a universal wheel bracket which can still run smoothly under high load, so as to solve the technical problem that the existing universal wheel bracket is easy to loosen the fit between the wheel axle and the bracket body when working under high load, produces eccentric movement, and causes unstable operation.

[0004] To achieve the above purpose, the specific technical solution of the utility model is as follows:

[0005] A high-load special universal wheel bracket comprises a seat plate, a wheel axle and a bracket body, wherein the seat plate and the bracket body are arranged in an upper and lower stack, the wheel axle passes through the two in sequence from top to bottom, and the two are fixed together by a tightening nut at the end of the wheel axle, the wheel axle is divided into a plurality of shaft steps arranged in sequence from top to bottom, and the wheel axle is installed in cooperation with the seat plate and the bracket body through the plurality of shaft steps.

[0006] Furthermore, the seat plate includes a plate body, and a plurality of mounting holes are evenly distributed around the periphery of the plate body. The middle part of the plate body is bent downward to form a downwardly convex arc-shaped cap bulge. The bracket body is arranged below the plate body, and a corresponding pressure bearing is arranged between the two. The outer diameter of the cap bulge corresponds to the inner diameter of the pressure bearing, and a rivet hole corresponding to the wheel axle is arranged at the center of the cap bulge.

[0007] Furthermore, the wheel axle is a rivet axle, which includes a first step, a second step, a third step and a fourth step arranged in sequence from top to bottom on the same shaft rod, four steps with their axes on the same axis, and the radial dimensions of the four steps decrease from top to bottom. The wheel axle is positioned and installed in correspondence with the seat plate through the first step and the second step, and a corresponding tapered bearing is provided on the third step. The third step is positioned and installed in correspondence with the bracket body through the tapered bearing, and the fourth step is covered with external threads. The tightening nut is tightened with the tapered bearing on the fourth step below the fourth step.

[0008] Furthermore, the first shaft step is clamped on the top of the cap protrusion, and its lower surface is fitted with the upper surface of the cap protrusion. The second shaft step is installed through an interference fit concentric with the rivet hole. The tapered bearing is correspondingly mounted on the third shaft step, and the inner ring of its upper surface is against the lower surface of the second shaft step, and the outer ring of its upper surface is against the lower surface of the bracket body, and its lower surface is fitted with the upper surface of the tightening nut lower than the lower surface of the third shaft step.

[0009] Furthermore, the bracket body includes a cylindrical cap seat with an internal hollow opening facing upward, and the pressure bearing is correspondingly installed in its inner cavity. The lower surface of the pressure bearing fits against the bottom surface of the inner cavity of the cap seat, and the middle part of the bottom wall of the cap seat is bent upward to form an arc-shaped upper concave cap recess, the center of the cap recess is on the axis of the cap seat, and a corresponding center hole is provided at the center of the cap recess, the outer ring of the upper surface of the tapered bearing is against the lower surface of the cap recess of the outer ring of the center hole, the inner cavity side wall of the cap recess corresponds to the outer diameter of the tapered bearing, and the outer edge of the top surface of the cap recess corresponds to the inner diameter of the pressure bearing, and a pair of mirror-corresponding frame plates are provided below the cap seat, the top end of the frame plates is fixedly connected to the bottom surface of the cap seat, and the lower part of the two frame plates is provided with a corresponding pair of through holes.

[0010] Furthermore, the depth of the inner cavity of the cap seat is not greater than the thickness of the pressure bearing, and a corresponding dust ring is provided between the cap seat of the outer ring of the pressure bearing and the seat plate body.

[0011] Furthermore, a dust cover is provided between the tapered bearing and the tightening nut. The dust cover is a thin cover body with a hollow interior and an upward opening. The dust cover is mounted on the axle through a cover hole on its bottom wall corresponding to the axle. The dust cover is fixed to the bottom of the tapered bearing by the tightening nut. The tapered bearing is in its inner cavity, and the dust cover covers the outside of the tapered bearing from below.

[0012] Furthermore, the bottom surface of the axle is subjected to an oil pressure opening treatment using a corresponding mold through an external press machine, so that the radial dimension of the bottom end of the axle becomes larger.

[0013] The high-load special universal wheel bracket of the utility model is installed more tightly and firmly with other components of the universal wheel bracket through the arrangement of multi-axis steps of the wheel axle. The universal wheel bracket has better pressure-bearing capacity and will not be deformed due to high load, thereby making the operation of the universal wheel safer and more stable, thereby increasing the application range of the universal wheel and improving the service life and available economic benefits of the universal wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 For this utility model Figure 1 Schematic diagram of the structure in AA direction;

[0016] Explanation of marks in the figure: 1. seat plate; 11. plate body; 12. mounting hole; 13. cap protrusion; 14. rivet hole; 2. axle; 21. first shaft step; 22. second shaft step; 23. third shaft step; 24. fourth shaft step; 3. bracket body; 31. cap seat; 32. bracket plate; 33. cap recess; 34. center hole; 35. through hole; 4. tightening nut; 5. pressure bearing; 6. tapered bearing; 7. dust ring; 8. dust cover; 81. cover hole. DETAILED DESCRIPTION

[0017] In order to better understand the purpose, structure and function of the utility model, the following is a further detailed description of a high-load special universal wheel bracket of the utility model in conjunction with the accompanying drawings.

[0018] like Figure 1-2 As shown, the utility model high-load special universal wheel bracket includes a seat plate 1, an axle 2 and a bracket body 3, the axle 2 passes through the seat plate 1 and the bracket body 3 to connect the two in series, and the end of the axle 2 is provided with a corresponding tightening nut 4, under the action of the tightening nut 4, the three are detachably fixed together, wherein the bracket body 3 is correspondingly installed with the corresponding roller external connection to form a rotatable universal wheel as a whole, the universal wheel bracket is fixedly installed on the corresponding external carrier through the seat plate 1, and the universal wheel can then support the transfer and transportation of the corresponding carrier.

[0019] The seat plate 1 includes a plate body 11, and a plurality of mounting holes 12 are evenly distributed around the periphery of the plate body 11. The seat plate 1 is externally mounted on the corresponding carrier through the mounting holes 12. The middle part of the plate body 11 is bent downward to form an arc-shaped downward convex cap 13. The outer diameter of the cap 13 is circular. The bracket body 3 is arranged below the plate body 11. A corresponding pressure bearing 5 is arranged between the plate body 11 and the bracket body 3. The upper surface of the pressure bearing 5 is in contact with the lower surface of the seat plate 1, and the lower surface of the pressure bearing 5 is in contact with the upper surface of the bracket body 3. Under the action of the pressure bearing 5, after the plate body 11 is fixed, the bracket body 3 can still rotate relative to the plate body 11 around the axis of the pressure bearing 5. The inner diameter of the pressure bearing 5 corresponds to the outer diameter of the cap protrusion 13. During installation, the cap protrusion 13 positions the pressure bearing 5 in the radial direction so that it will not shake at will when it rotates under the load-bearing state of the universal wheel. A rivet hole 14 that passes through the cap protrusion 13 is provided at the center of the cap protrusion 13. The rivet hole 14 corresponds to the wheel axle 2, and the wheel axle 2 passes through the rivet hole 14 and is installed correspondingly to the seat plate 1.

[0020] The seat plate 1 and the bracket body 3 are stacked up and down, and the wheel axle 2 passes through the stacked seat plate 1 and the bracket body 3 from top to bottom to fix the two together. In this embodiment, the wheel axle 2 is a rivet axle, and the wheel axle 2 is divided into a plurality of different shaft steps. In this embodiment, it is divided into four shaft steps arranged in sequence from top to bottom, namely, a first shaft step 21, a second shaft step 22, a third shaft step 23 and a fourth shaft step 24. The four shaft steps are arranged in sequence from top to bottom on the same shaft rod, and the radial dimensions of the four shaft steps are different. They decrease in sequence from top to bottom. The axis centers of the four shaft steps are on the same straight line and are all on the axis of the wheel axle 2. The radial dimension of the first shaft step 21 is larger than the dimension of the rivet hole 14, and its height is not greater than the depth of the cap protrusion 13. The second shaft step 22 is adjacent to the rivet hole 1 4, and its height is much larger than the thickness of the cap protrusion 13. When the wheel shaft 2 is installed correspondingly to the seat plate 1, the first shaft step 21 is stuck on the top of the cap protrusion 13, and its lower surface is in contact with the upper surface of the cap protrusion 13. At this time, the top surface of the first shaft step 21 is not higher than the upper surface of the plate body 11, and the second shaft step 22 passes through the rivet hole 14 and is installed in correspondence with it. There is an interference fit between the two, and the two are riveted together by external force. In this embodiment, the two are fixedly installed together by the action of an external press, and the axis of the second shaft step 22 coincides with the center of the rivet hole 14. The seat plate 1 and the wheel shaft 2 are positioned by the fixed installation of the two. In this way, when the universal wheel is loaded and rotated, there will be no shaking due to the interval between the two. The wheel shaft 2 The third shaft step 23 is installed correspondingly with the bracket body 3, and a corresponding tapered bearing 6 is provided on the third shaft step 23. The third shaft step 23 is installed correspondingly with the bracket body 3 through the tapered bearing 6, and the wheel axle 2 positions the bracket through the tapered bearing 6. The inner ring of the tapered bearing 6 corresponds to the outer diameter of the third shaft step 23, and it is sleeved on the third shaft step 23, and its thickness is greater than the height of the third shaft step 23. When installed correspondingly, the inner ring of the upper surface of the tapered bearing 6 abuts against the lower surface of the second shaft step 22, and the outer ring of its upper surface abuts against the lower surface of the bracket body 3. At this time, its lower surface is lower than the lower surface of the third shaft step 23. The tightening nut 4 is arranged on the fourth shaft step 24 below the tapered bearing 6. The fourth shaft step 24 is covered with external threads. The tightening nut 4 is tightened with the third shaft step 22. The fourth shaft step 24 corresponds to the fourth shaft step 24, and the internal thread of its inner ring corresponds to the external thread of the fourth shaft step 24. The tightening nut 4 is screwed on the fourth shaft step 24 through the corresponding thread. As the tightening nut 4 is gradually tightened upward, its upper surface fits with the lower surface of the tapered bearing 6, so that the tapered bearing 6 is fixedly installed on the third shaft step 23, and then the tapered bearing 6 and the components above it are tightly fitted with the wheel axle 2. The outer ring of the tapered bearing 6 corresponds to the bracket body 3, and the bracket body 3 forms a fixed position in the radial direction through the tapered bearing 6 and the wheel axle 2. Under the action of the tapered bearing 6, the bracket body 3 will not shake due to eccentricity while rotating around the wheel axle 2, thereby making the rotation of the universal wheel more stable and safer.

[0021] The bracket body 3 includes a cap seat 31 and a bracket plate 32. The bracket body 3 is installed correspondingly with the seat plate 1 and the wheel axle 2 through the cap seat 31. The cap seat 31 is a cylindrical cap-shaped body with a hollow interior and an upward opening. The pressure bearing 5 is correspondingly installed in its inner cavity. The depth of the inner cavity of the cap seat 31 is not greater than the thickness of the pressure bearing 5, and the radial dimension of its inner cavity is not less than the outer diameter of the pressure bearing 5. In this embodiment, the inner cavity bottom surface of the cap seat 31 and the lower surface of the pressure bearing 5 are in contact with each other, and the inner cavity side wall of the cap seat 31 and the outer wall of the pressure bearing 5 are in contact with each other. The middle part of the bottom wall is bent upward to form an arc-shaped upper concave cap recess 33. The outer diameter of the cap recess 33 is a circle coaxial with the cap seat 31. A corresponding center hole 34 is provided at the center of the cap recess 33. The center of the center hole 34 is on the axis of the cap protrusion 13. After the lower end of the wheel shaft 2 passes through the center hole 34, it is then installed correspondingly with the corresponding tapered bearing 6. The size of the center hole 34 is larger than the radial size of the wheel shaft 2 and smaller than the outer diameter of the tapered bearing 6. The outer ring of the upper surface of the tapered bearing 6 is against the cap recess 33 of the outer ring of the center hole 34. On the surface, the side wall of the cap recess 33 in this embodiment is an inverted funnel shape with a small upper opening and a large lower opening. The radial size of the top end of the inner cavity side wall corresponds to the outer diameter size of the tapered bearing 6. The tapered bearing 6 positions the bracket body 3 through the cap recess 33 in the radial direction, thereby achieving the positioning effect of the wheel shaft 2 on the bracket body 3 through the tapered bearing 6, so that the bracket body 3 will not shake when rotating. The outer edge of the top surface of the cap recess 33 corresponds to the inner diameter size of the pressure bearing 5, and its auxiliary cap protrusion 13 positions and installs the pressure bearing 5. The frame plate 32 is arranged on the cap seat 3 1, a corresponding pair of frame plates 32 are arranged on the bottom surface of the cap seat 31 in a mirror-image manner, and the top of the frame plate 32 is fixedly connected to the bottom surface of the cap seat 31. In this embodiment, the plate wall of the frame plate 32 is vertically downward, but the left and right side walls thereof are inclined at a certain angle to the horizontal line. Such a design facilitates its rotation corresponding to the cap seat 31, that is, facilitates the multi-directional rotation of the universal wheel. A corresponding pair of through holes 35 are provided at the lower part of the two corresponding frame plates 32, and the frame plates 32 are externally mounted with corresponding rollers through the through holes 35.

[0022] Furthermore, a dust ring 7 is provided on the outer ring of the pressure bearing 5. The dust ring 7 is arranged between the cap seat 31 of the outer ring of the pressure bearing 5 and the plate body 11 of the seat plate 1. Its inner ring corresponds to the pressure bearing 5, and its upper part is in contact with the lower surface of the plate body 11, and its lower part is in contact with the top surface of the side wall of the cap seat 31. The setting of the dust ring 7 can prevent external dust or debris from entering the interior of the cap seat 31, thereby affecting the rotation of the universal wheel.

[0023] Furthermore, a dust cover 8 is provided between the tapered bearing 6 and the tightening nut 4. The dust cover 8 is a thin cover body with a hollow interior and an upward opening. Its inner cavity corresponds to the outer ring of the tapered bearing 6, and a cover hole 81 corresponding to the fourth shaft step 24 is provided on its bottom wall. After the dust cover 8 is mounted on the fourth shaft step 24 through the cover hole 81, it covers the outside of the tapered bearing 6 from below when in use, so that the tapered bearing 6 is in its inner cavity, and then is fixed to the bottom of the tapered bearing 6 by the tightening nut 4, the upper surface of the bottom wall of which is in contact with the lower surface of the tapered bearing 6, and the lower surface of the bottom wall of which is in contact with the tightening nut 4, and the height of the side wall is not greater than the thickness of the tapered bearing 6. In this way, the dust cover 8 can prevent external dust from entering the tightening nut 4 while not affecting the fitting installation between the tightening nut 4 and the components above it.

[0024] Furthermore, after the various components of the universal wheel bracket are assembled, the bottom surface of the axle 2 is subjected to oil pressure treatment using a corresponding mold through an external press, so that the radial dimension of the bottom end of the axle 2 becomes larger, thereby preventing the tightening nut 4 from falling off, and at the same time making the fit between the various components of the universal wheel bracket tighter.

[0025] When in use, first install the corresponding roller on the universal wheel bracket through the through hole 35 on the frame, and then install the universal wheel externally on the corresponding carrier through the corresponding screw passing through the mounting hole 12 of the seat plate 1. At this time, the universal wheel is installed and can be used. According to needs, one or more universal wheels of a corresponding number are fixedly installed on the corresponding carrier. After all the installation is completed, the universal wheel can be transported by the carrier above it.

[0026] The high-load special universal wheel bracket of the utility model adopts the multi-axis step design of the wheel shaft 2 to make the cooperation with the seat plate 1 and the bracket body 3 more tightened, and the cooperation and positioning installation of the pressure bearing 5 and the tapered bearing 6 make the cooperation between the various components on the universal wheel bracket more rigorous, and the positioning between the various components is more accurate, so that the various components of the universal wheel bracket will not be easily loose under high load, and will not shake when it rotates, so that the universal wheel can still run smoothly under high load, and different types of rollers can be externally connected according to needs, and its available range is larger, and the close cooperation of the various components of the universal wheel frame reduces the wear between the various components, and its service life is longer, and the economic benefits that can be created when it is used are higher.

[0027] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A high-load special universal wheel bracket, characterized in that: It comprises a seat plate (1), a wheel axle (2) and a bracket body (3), wherein the seat plate (1) and the bracket body (3) are arranged in a stacked manner, the wheel axle (2) passes through the two in sequence from top to bottom, and the two are fixed together by a tightening nut (4) at the end of the wheel axle (2), the wheel axle (2) is divided into a plurality of shaft steps arranged in sequence from top to bottom, and the wheel axle (2) is installed in cooperation with the seat plate (1) and the bracket body (3) through the plurality of shaft steps; The seat plate (1) comprises a plate body (11), a plurality of mounting holes (12) are evenly distributed around the periphery of the plate body (11), the middle portion of the plate body (11) is bent downward to form a downwardly convex arc-shaped cap protrusion (13), the bracket body (3) is arranged below the plate body (11), a corresponding pressure bearing (5) is arranged between the two, the outer diameter of the cap protrusion (13) corresponds to the inner diameter of the pressure bearing (5), and a rivet hole (14) corresponding to the wheel axle (2) is arranged at the center of the cap protrusion (13); The wheel axle (2) is a rivet axle, which comprises a first step (21), a second step (22), a third step (23) and a fourth step (24) arranged in sequence from top to bottom on the same shaft rod, and the four steps are located on the same axis. The radial dimensions of the four steps decrease from top to bottom. The wheel axle (2) is positioned and installed in correspondence with the seat plate (1) through the first step (21) and the second step (22). A corresponding tapered bearing (6) is provided on the third step (23). The third step (23) is positioned and installed in correspondence with the bracket body (3) through the tapered bearing (6). The fourth step (24) is covered with external threads. The tightening nut (4) is tightened and fitted on the fourth step (24) below the tapered bearing (6).

2. The high-load special universal wheel bracket according to claim 1, characterized in that: The first shaft step (21) is clamped on the top of the cap protrusion (13), and its lower surface is in contact with the upper surface of the cap protrusion (13). The second shaft step (22) is installed through the rivet hole (14) and is coaxial with it. The tapered bearing (6) is correspondingly mounted on the third shaft step (23), and the inner ring of its upper surface is against the lower surface of the second shaft step (22), and the outer ring of its upper surface is against the lower surface of the bracket body (3), and its lower surface is in contact with the upper surface of the tightening nut (4) which is lower than the lower surface of the third shaft step (23).

3. The high-load special universal wheel bracket according to claim 1, characterized in that: The support body (3) comprises a cylindrical cap seat (31) with an internal hollow opening facing upward, a pressure bearing (5) being correspondingly mounted in the inner cavity thereof, the lower surface of the pressure bearing (5) being in contact with the inner cavity bottom surface of the cap seat (31), the middle portion of the bottom wall of the cap seat (31) being bent upward to form an arc-shaped upper concave cap recess (33), the center of the cap recess (33) being located on the axis of the cap seat (31), a corresponding center hole (34) being arranged at the center of the cap recess (33), and the upper surface of the tapered bearing (6) being provided with a plurality of holes. The outer ring of the surface is against the lower surface of the cap recess (33) of the outer ring of the center hole (34), the inner cavity side wall of the cap recess (33) corresponds to the outer diameter of the tapered bearing (6), the outer edge of the top surface of the cap recess (33) corresponds to the inner diameter of the pressure bearing (5), and a pair of mirror-corresponding frame plates (32) are provided below the cap seat (31), the top end of the frame plates (32) is fixedly connected to the bottom surface of the cap seat (31), and the lower part of the two frame plates (32) is provided with a corresponding pair of through holes (35).

4. The high-load special universal wheel bracket according to claim 3, characterized in that: The depth of the inner cavity of the cap seat (31) is not greater than the thickness of the pressure bearing (5), and a corresponding dust ring (7) is provided between the cap seat (31) of the outer ring of the pressure bearing (5) and the plate body (11) of the seat plate (1).

5. The high-load special universal wheel bracket according to claim 1, characterized in that: A dust cover (8) is arranged between the tapered bearing (6) and the tightening nut (4). The dust cover (8) is a thin cover body with a hollow interior and an upward opening. The dust cover (8) is mounted on the wheel axle (2) through a cover hole (81) on its bottom wall corresponding to the wheel axle (2). The dust cover (8) is fixed below the tapered bearing (6) through the tightening nut (4). The tapered bearing (6) is in its inner cavity and covers the outside of the tapered bearing (6) from below.

6. The high-load special universal wheel bracket according to claim 1, characterized in that: The bottom surface of the wheel axle (2) is subjected to an oil pressure opening treatment using a corresponding mold through an external press machine, thereby increasing the radial dimension of the bottom end of the wheel axle (2).

Images