CN212073547U

CN212073547U - Bearing caster

Info

Publication number: CN212073547U
Application number: CN202020553094.6U
Authority: CN
Inventors: 利伟坚
Original assignee: Guangzhou Conghua Xinxing Metal Caster Products Co ltd
Current assignee: Guangzhou Xinxing Metal Co.,Ltd.
Priority date: 2020-04-15
Filing date: 2020-04-15
Publication date: 2020-12-04
Anticipated expiration: 2030-04-15

Abstract

The utility model relates to a truckle technical field specifically is a bearing truckle, including the mounting panel, lower apron, the fastener, truckle support and gyro wheel, the upper end of truckle support is annular connecting portion, connecting portion are located between mounting panel and the lower apron, truckle support is rotated through locating the first ball between them with the mounting panel and is connected, truckle support rotates through locating the second ball between them with lower apron and is connected, the middle part of mounting panel is equipped with first boss, the middle part of lower apron is equipped with the second boss, the fastener is with mounting panel and lower apron fixed connection, the surface of first boss and second boss pastes mutually. The utility model discloses the bearing truckle carries out improved design through the rotation position structure to the truckle support to make this bearing truckle under the condition that does not increase section bar grade and size, also can have more excellent overall structure intensity, stability and bearing capacity.

Description

Bearing caster

Technical Field

The utility model relates to a truckle technical field specifically is a bearing truckle.

Background

The truckle is installed on transport means usually, the truckle generally includes the gyro wheel, the truckle support, in use, not only need the relative truckle support of gyro wheel to roll in order to realize the function of advancing, still need the truckle support can rotate in order to realize turning to the function relatively transport means, when transport means bearing weight is great, the rotation position of truckle support damages easily because of bearing huge pressure, in order to increase the bearing capacity of truckle, traditional truckle is generally through increasing truckle section bar grade or section bar size, the mode of thickness, but the cost of manufacture of this kind of mode meeting greatly increased truckle, and often still can produce through the mode that increases section bar size and be difficult to with former transport means assorted problem.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model aims to provide a bearing truckle, this bearing truckle improves the design through the rotation position structure to the truckle support to make this bearing truckle under the condition that does not increase section bar grade and size, also can have more excellent overall structure intensity, stability and bearing capacity.

The utility model discloses the task is realized through following technical scheme:

a bearing caster comprises a mounting plate, a lower cover plate, a fastener, a caster bracket and a roller arranged on the caster bracket, wherein the upper end of the caster bracket is provided with an annular connecting part, the connecting part is positioned between the mounting plate and the lower cover plate, the lower surface of the mounting plate and the upper surface of the connecting part are respectively and relatively provided with a first annular groove and a second annular groove, the lower surface of the connecting part and the upper surface of the lower cover plate are respectively and relatively provided with a third annular groove and a fourth annular groove, the cross sections of the first annular groove, the second annular groove, the third annular groove and the fourth annular groove are both of concave arc structures, a plurality of first balls are arranged between the first annular groove and the second annular groove, a plurality of second balls are arranged between the third annular groove and the fourth annular groove, the caster bracket is rotatably connected with the mounting plate through the first balls, the caster bracket is rotatably connected with the lower cover plate through the second balls, and the middle structure, the middle part structure of apron is the second boss that extends towards the mounting panel down, the fastener passes the perforation on first boss and the second boss respectively and with mounting panel and lower apron fixed connection together, and the lower surface of first boss and the laminating of the upper surface of second boss mutually.

Preferably, the upper surface of mounting panel is located fenestrate and is equipped with first annular arch all around, the lower surface of apron is located fenestrate all around and is equipped with second annular arch down, the protruding inboard butt of upper end side and first annular of fastener, the protruding inboard butt of lower end side and second annular of fastener.

Preferably, the upper end head and/or the lower end head of the fastener comprises a matched gasket and is abutted with the inner side of the first annular bulge or the inner side of the second annular bulge through the gasket.

Preferably, the diameter of the fastener is equal to or slightly less than the diameter of the perforation, such that the outer sidewall of the fastener conforms to the inner sidewall of the perforation.

Preferably, if the diameter of the first ball is D1 and the depths of the first ring groove and the second ring groove are L1, the range of L1 is: 0.25 × D1 ≤ L1 < 0.5 × D1; assuming that the diameter of the second ball is D2, the depths of the third ring groove and the fourth ring groove are L2, and the range of L2 is: 0.25 × D2 ≤ L1 < 0.5 × D2.

Preferably, if the diameter of the first ball is D1, gaps exist between the first balls, and the sum of the gaps between the first balls is K1, the range of K1 is: k1 is more than 0 and less than or equal to D1; if the diameter of the second ball is D2, gaps exist among the second balls, and the sum of the gaps among the second balls is K2, the range of K2 is: k2 is more than 0 and less than or equal to D2.

Preferably, the second ring groove and the third ring groove are arranged in a staggered manner in the radial direction of the connecting portion, and the second ring groove is located on the outer side of the third ring groove in the radial direction.

Preferably, the fastener is an explosion rivet, and the lower end of the fastener is an explosion end of the explosion rivet.

Preferably, the roller is rotatably connected with the caster bracket through a rolling bearing.

Preferably, the caster bracket is an integrally formed integral structure.

Compared with the prior art, the beneficial effects of the utility model are that: the connecting part of the caster bracket is positioned between the mounting plate and the lower cover plate and is respectively in rotating connection with the mounting plate and the lower cover plate through the balls, so that the rotating resistance of the caster bracket is smaller, and the vertical bearing capacity of the caster bracket is better due to the structure; the mounting plate and the lower cover plate are mutually supported in the circumferential direction by arranging the first boss and the second boss on the mounting plate and the lower cover plate respectively, so that the mounting plate and the lower cover plate cannot relatively shake when bearing heavy pressure, and the rotating part of the caster bracket has excellent integral structural strength, stability and bearing capacity; the first ring groove, the second ring groove, the third ring groove and the fourth ring groove are arranged, and the cross section of each ring groove is of a concave arc structure corresponding to the spherical surface of the ball, so that the ball is better in laminating property, larger in bearing area and better in bearing capacity, the groove has a good limiting effect on the ball, and the ball can be prevented from falling off accidentally; the upper end and the lower end of the fastener are respectively abutted against the side surfaces of the annular bulges on the mounting plate and the lower cover plate, so that two ends of the fastener are respectively and mutually supported with the mounting plate and the lower cover plate in the radial direction, and the integral structural strength, the stability and the bearing capacity of the rotating part of the caster bracket are further improved; the outer side wall of the fastener is attached to the inner side wall of the through hole, so that the side wall of the fastener is respectively and mutually supported with the mounting plate and the lower cover plate in the radial direction, and the overall structural strength, the stability and the bearing capacity of the rotating part of the caster bracket are further improved; setting the depth of each ring groove to be less than the radius of the corresponding ball and more than half of the radius of the ball, so that a gap exists between the structures of the upper ring groove and the lower ring groove, the increase of rotation resistance caused by friction generated during relative rotation is prevented, meanwhile, the joint area of the ball and the corresponding ring groove can be ensured, and the limiting effect of the ring grooves on the ball is ensured; gaps exist among all the balls in the same row, the sum of the gaps is smaller than the diameter of one ball, and the bearing capacity of the whole row of balls can be considered under the condition that the whole row of balls can rotate flexibly and cannot interfere with each other; the second ring groove and the third ring groove are staggered in the radial direction, so that the thickness of the rotating part of the caster bracket can be reduced, and the stability can be improved; ninthly, the caster bracket is of an integrated structure, and the structural strength is higher.

Drawings

FIG. 1 is a schematic structural view of a load-bearing caster according to an embodiment;

FIG. 2 is a schematic view of the internal structure of the load bearing caster of the embodiment;

figure 3 is an exploded view of the load bearing caster of the embodiments.

The mounting plate comprises a mounting plate 1, a first annular groove 11, a first boss 12, a first annular bulge 13, a lower cover plate 2, a fourth annular groove 21, a second boss 22, a second annular bulge 23, a fastener 3, a lower end head 31, an upper end head 32, a caster support 4, a connecting portion 41, a second annular groove 411, a third annular groove 412, a roller 5, a first ball 6, a second ball 7, a gasket 8 and a rolling bearing 9.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.

In the description of the present application, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like refer to orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In the description of the present application, "a plurality" means two or more unless otherwise specified.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

As shown in fig. 1-3, a load-bearing caster comprises a mounting plate 1, a lower cover plate 2, a fastener 3, a caster bracket 4 and a roller 5 mounted on the caster bracket 4, wherein the mounting plate is provided with a plurality of mounting holes, and the whole caster can be mounted on the bottom surface of a transport tool through the mounting plate 1. The caster wheel bracket 4 is of an integrally formed cast iron structure, the roller 5 is rotatably connected with the lower end of the caster wheel bracket 4 through a rolling bearing 9, the upper end of the caster wheel bracket 4 is an annular connecting part 41, the connecting part 41 is positioned between the mounting plate 1 and the lower cover plate 2, the connecting part 41, the mounting plate 1 and the lower cover plate 2 are coaxially arranged, the lower surface of the mounting plate 1 and the upper surface of the connecting part 41 are respectively and oppositely provided with a first ring groove 11 and a second ring groove 411, the lower surface of the connecting part 41 and the upper surface of the lower cover plate 2 are respectively and oppositely provided with a third ring groove 412 and a fourth ring groove 21, the cross sections of the first ring groove 11, the second ring groove 411, the third ring groove 412 and the fourth ring groove 21 are of concave arc structures matched with ball surfaces, a plurality of first balls 6 are arranged between the first ring groove 11 and the second ring groove 411, a plurality of second balls 7 are arranged between the third ring groove 412 and the fourth ring groove 21, the caster support 4 rotates through whole second ball 7 with lower apron 2 and is connected, the middle part structure of mounting panel 1 is the first boss 12 that extends towards lower apron 2, the middle part structure of lower apron 2 is the second boss 22 that extends towards mounting panel 1, the perforation in the middle of first boss 12 and the second boss 22 and with mounting panel 1 and lower apron 2 fixed connection together are passed respectively to fastener 3, and the lower surface of first boss 12 and the upper surface of second boss 22 laminate mutually.

The utility model discloses a bearing caster, the connecting portion 41 of the caster bracket 4 is located between the mounting plate 1 and the lower cover plate 2, and is respectively connected with the mounting plate 1 and the lower cover plate 2 by the rolling ball in a rotating way, so that the rotating resistance of the caster bracket 4 is smaller, and the vertical bearing capacity of the caster bracket 4 is better by the structure; the mounting plate 1 and the lower cover plate 2 are respectively provided with the first boss 12 and the second boss 22, and the first boss 12 and the second boss 22 are attached to each other, so that the mounting plate 1 and the lower cover plate 2 are mutually supported in the circumferential direction, the mounting plate 1 and the lower cover plate 2 cannot relatively shake when bearing heavy pressure, and the rotating part of the caster bracket 4 has excellent overall structural strength, stability and bearing capacity; set up first annular 11, second annular 411, third annular 412 and fourth annular 21, and the cross-section of each annular is the concave arc structure that corresponds with the ball sphere for the laminating nature of ball is better, and the bearing area is bigger, and bearing capacity is better, and the recess has good limiting displacement to the ball moreover, can make the ball also can not accidentally drop when bearing the heavy load of all directions. The utility model discloses bearing truckle and same section bar size's traditional truckle are compared, and the bearing capacity at its truckle support rotation position can improve more than 50% one time even, and the durability is better, and life is longer, verifies through the contrast experiment: the bearing capacity of the bearing caster wheel of the utility model adopting the 2-inch universal low gravity center wheel can reach more than 500kg, while the bearing capacity of the bearing caster wheel adopting the traditional caster wheel of the same section bar is generally only below 200 kg; the bearing capacity of the bearing caster wheel of the utility model adopting the 2.5-inch universal low gravity center wheel can reach more than 700kg, while the bearing capacity of the bearing caster wheel adopting the traditional caster wheel of the same section bar is generally below 500kg of 300-inch common low gravity center wheel; adopt 3 cun, 4 cun general low gravity center wheels the utility model discloses bearing truckle, its bearing capacity can reach more than 1000kg, and adopt the traditional truckle of same section bar, its bearing capacity is generally only below 500 supplementarily 600kg, in addition, in above-mentioned each contrast experiment, the utility model discloses bearing truckle homoenergetic can be at 2.5 Km/h's speed of time more than 3 hours of walking in succession steadily.

The upper surface of mounting panel 1 is located the fenestrate protruding 13 of first annular that is equipped with all around, the lower surface of lower apron 2 is located the fenestrate protruding 23 of second annular that is equipped with all around, fastener 3 is the explosion rivet, the lower end 31 of fastener 3 is the end of exploding, during the assembly, pass mounting panel 1 and lower apron 2 back with fastener 3, and be equipped with matched with gasket 8 at the lower end overcoat of fastener 3, the mode through the punching press makes the lower end of fastener 3 explode all around, thereby die mounting panel 1 and lower apron 2 together admittedly, and the week side of gasket 8 and the protruding inboard butt of second annular, the upper end 32 and the protruding inboard butt of first annular of fastener 3. This design makes the both ends of fastener 3 support each other with mounting panel 1, lower apron 2 in radial respectively, further increases truckle support 4 and rotates position overall structure intensity, stability and bearing capacity.

The diameter of the fastener 3 is equal to or slightly less than the diameter of the bore so that the outer sidewall of the fastener 3 conforms to the inner sidewall of the bore. The side wall of the fastener 3 is supported with the mounting plate 1 and the lower cover plate 2 in the radial direction, and the overall structural strength, stability and bearing capacity of the rotating part of the caster bracket 4 are further improved.

The diameter of first ball 6 is 6mm, the degree of depth of first annular 11 and second annular 411 is about 2.5mm, thereby make mounting panel 1 and truckle support 4 have clearance (tolerance range is less than 0.2mm) about 1mm under the support of first ball 6, contact and produce frictional resistance when preventing the relative mounting panel 1 of truckle support 4 from rotating like this, also can guarantee first ball and the laminating area that corresponds the annular simultaneously as far as, and guarantee the limiting displacement of annular to first ball.

The diameter of second ball 7 is 5.5mm, the degree of depth of third annular 412 and fourth annular 21 is about 2.25mm, thereby make apron 2 and truckle support 4 down have 1mm clearance (tolerance range is less than 0.2mm) about under the support of second ball 7, contact and produce frictional resistance when preventing like this that the relatively apron 2 of truckle support 4 from rotating down, also can guarantee the laminating area of second ball and corresponding annular simultaneously as far as, and guarantee the limiting displacement of annular to the second ball.

Gaps exist among the first balls 6, gaps also exist among the second balls 7, the sum of the gaps among the first balls 6 is equal to one half of the diameter of the first balls, and the sum of the gaps among the second balls 7 is equal to one half of the diameter of the second balls. There is the space between each ball of same row, and the clearance sum is less than the diameter of a ball, can guarantee that whole row of ball rotates under the nimble not mutual interference's the condition, compromise whole row of ball's bearing capacity simultaneously.

The second ring groove 411 and the third ring groove 412 are provided to be offset in the radial direction of the connecting portion 41, and the second ring groove 411 is located radially outside the third ring groove 412, so that the thickness of the rotating portion of the caster bracket 4 can be reduced, and the stability can be increased.

The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be understood by those skilled in the art that the scope of the present invention is not limited to the specific combination of the above-mentioned features, but also covers other embodiments formed by any combination of the above-mentioned features or their equivalents without departing from the spirit of the present invention. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims

1. A bearing caster is characterized by comprising a mounting plate (1), a lower cover plate (2), a fastener (3), a caster bracket (4) and a roller (5) mounted on the caster bracket (4), wherein the upper end of the caster bracket (4) is provided with an annular connecting part (41), the connecting part (41) is positioned between the mounting plate (1) and the lower cover plate (2), the lower surface of the mounting plate (1) and the upper surface of the connecting part (41) are respectively and oppositely provided with a first ring groove (11) and a second ring groove (411), the lower surface of the connecting part (41) and the upper surface of the lower cover plate (2) are respectively and oppositely provided with a third ring groove (412) and a fourth ring groove (21), the cross sections of the first ring groove (11), the second ring groove (411), the third ring groove (412) and the fourth ring groove (21) are of concave arc structures, and a plurality of first balls (6) are arranged between the first ring groove (11) and the second ring groove (, be equipped with a plurality of second balls (7) between third annular (412) and fourth annular (21), truckle support (4) pass through with mounting panel (1) first ball (6) rotate to be connected, truckle support (4) pass through with apron (2) down second ball (7) rotate to be connected, the middle part structure of mounting panel (1) is first boss (12) of apron (2) extension under the orientation, the middle part structure of apron (2) is second boss (22) of extending towards mounting panel (1) down, fastener (3) pass through the perforation on first boss (12) and second boss (22) respectively and with mounting panel (1) and apron (2) fixed connection together down, and the lower surface of first boss (12) and the upper surface of second boss (22) laminate mutually.

2. The load-bearing caster wheel according to claim 1, wherein the upper surface of the mounting plate (1) is provided with a first annular bulge (13) around the through hole, the lower surface of the lower cover plate (2) is provided with a second annular bulge (23) around the through hole, the side of the upper end head (32) of the fastener (3) is abutted against the inner side of the first annular bulge (13), and the side of the lower end head (31) of the fastener (3) is abutted against the inner side of the second annular bulge (23).

3. The load-bearing castor according to claim 2, characterized in that said upper head (32) and/or lower head (31) of said fastener (3) comprise a cooperating gasket (8) and are in abutment by means of said gasket (8) with the inside of said first annular protuberance (13) or with the inside of said second annular protuberance (23).

4. The load-bearing caster according to claim 1, characterized in that said fastener (3) has a diameter equal to or slightly smaller than the diameter of said perforation, so that the outer side wall of the fastener (3) conforms to the inner side wall of the perforation.

5. The load-bearing castor according to claim 1, wherein, given a diameter D1 for said first ball (6) and a depth L1 for said first (11) and second (411) grooves, said L1 ranges from: 0.25 × D1 ≤ L1 < 0.5 × D1; assuming that the diameter of the second ball (7) is D2, the depth of the third ring groove (412) and the fourth ring groove (21) is L2, and the range of L2 is: 0.25 × D2 ≤ L1 < 0.5 × D2.

6. The load-bearing caster wheel according to claim 1, wherein, given a diameter D1 of said first balls (6), gaps existing between said first balls (6), and a sum of the gaps between each of said first balls (6) being K1, said K1 ranges from: k1 is more than 0 and less than or equal to D1; if the diameter of the second ball (7) is D2, gaps exist among the second balls (7), and the sum of the gaps among the second balls (7) is K2, the K2 is in the range of: k2 is more than 0 and less than or equal to D2.

7. The load-bearing castor according to claim 1, characterized in that said second ring groove (411) and said third ring groove (412) are offset in the radial direction of said connecting portion (41), and in that the second ring groove (411) is located radially outside the third ring groove (412).

8. The load-bearing caster according to claim 1, characterized in that said fastener (3) is an explosive rivet, the lower end (31) of said fastener (3) being the explosive end of an explosive rivet.

9. The load-bearing caster wheel according to claim 1, characterized in that said roller (5) is rotatably connected to said caster wheel support (4) by means of a rolling bearing (9).

10. The load-bearing caster wheel according to claim 1, characterized in that said caster wheel support (4) is an integrally formed one-piece structure.