CN210211884U

CN210211884U - Mecanum wheel with adjustable bearing clearance

Info

Publication number: CN210211884U
Application number: CN201921102887.XU
Authority: CN
Inventors: Luqi Sun; 孙鹿奇; Xiao Chen; 陈晓
Original assignee: SHANGHAI HICTRL AUTOMATION TECHNOLOGY Co Ltd
Current assignee: SHANGHAI HICTRL AUTOMATION TECHNOLOGY Co Ltd
Priority date: 2019-07-15
Filing date: 2019-07-15
Publication date: 2020-03-31
Anticipated expiration: 2029-07-15

Abstract

A Mecanum wheel with an adjustable bearing gap comprises a left spoke, a right spoke, a middle hub and a roller assembly, wherein clamping notches are uniformly formed in the circumferential surfaces of the left spoke and the right spoke respectively, and locking screw holes are formed in the clamping notches; the roller assembly comprises a mandrel, a roller core and a locking bearing, wherein bearing pressing blocks are arranged at two ends of the mandrel, and pressing end faces of the bearing pressing blocks are in contact with the locking bearing; threaded holes are formed in the side surfaces of the two ends of the mandrel, locking bolts are connected in the threaded holes in a threaded mode, and the two locking bolts are respectively in threaded connection with locking screw holes in the clamping grooves. The utility model overcomes the defects of the prior art, has reasonable design, compact structure, simple assembly, thicker core shaft than the traditional core shaft and stronger bearing capacity; the bearing elasticity is adjustable and the service life can be greatly prolonged.

Description

Mecanum wheel with adjustable bearing clearance

Technical Field

The utility model relates to a mecanum wheel technical field, concretely relates to mecanum wheel in adjustable bearing clearance.

Background

The Mecanum wheel is mainly used in an omni-directional movement mode. This is based on the principle that a number of peripheral axles (i.e. rollers) around the centre wheel rotate, which angled peripheral axles transfer one part of the centre wheel steering force to another part of the centre wheel normal force in a moving system consisting of a number of centre wheels.

The traditional Mecanum wheel is divided into a left spoke, a right spoke, a middle hub and a small roller structure. A mecanum wheel structure as disclosed in patent publication No. CN203752789U has several disadvantages: 1. because the small roller mandrel needs to pass through the left spoke and the right spoke, and the two ends of the small roller mandrel are fastened by nuts, the small roller mandrel can only be made to be very thin, if the small roller mandrel is made to be thick, holes in the left spoke and the right spoke can be broken, and the nuts cannot play a role in locking; 2. in use, if errors occur in machining or installation, the errors are inevitable, so that the small rollers cannot be accurately positioned between the left spoke and the right spoke, a plurality of groups of small rollers are arranged on each wheel, the time-consuming adjustment effect is not ideal, and the small rollers are too loose or too tight on the left spoke and the right spoke; 3. when the small roller is assembled and disassembled, the core shaft of the small roller needs to be pulled out from the middle, so that impurities such as various scrap irons are easily mixed in the assembling and disassembling process, and the service life of the small roller bearing is further shortened.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model provides a Mecanum wheel with adjustable bearing clearance, which overcomes the defects of the prior art, has simple assembly, thicker core shaft than the traditional core shaft and stronger bearing capacity; the bearing elasticity is adjustable and the service life can be greatly prolonged.

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes:

a Mecanum wheel with an adjustable bearing gap comprises a left spoke, a right spoke, a middle hub and a roller assembly, wherein the middle hub is fixedly arranged between the left spoke and the right spoke; the roller assembly comprises a core shaft, a roller core and locking bearings, the locking bearings are fixedly arranged at two ends of the roller core, the core shaft penetrates through the middle of the roller core and is fixedly connected with the roller core, bearing pressing blocks are arranged at two ends of the core shaft, the two bearing pressing blocks are respectively fixed on two end faces of the core shaft through adjusting bolts, and the pressing end faces of the bearing pressing blocks are in contact with the locking bearings; the both ends of dabber are placed respectively in the joint notch on left spoke and right spoke circumference surface, dabber both ends side surface all sets up threaded hole, threaded hole female connection has locking bolt, two locking bolt respectively with left spoke and the intraoral locking screw threaded connection of right spoke circumference surface joint notch.

Preferably, left side spoke and right spoke all pass through fixing bolt fixed connection in middle wheel hub both sides, the equal swing joint in left side spoke and right spoke outside surface has the spoke locating pin, the spoke locating pin passes left spoke and right spoke surface to swing joint is inside at middle wheel hub.

Preferably, a bearing pressing gasket is arranged between the end faces of the bearing pressing block, which are in contact with the locking bearing, and the bearing pressing block is sleeved on the surface of the mandrel and is in contact with the end faces of the locking bearing.

Preferably, the outer surface of the roller core is coated with a rubber layer.

Preferably, the left spoke and the right spoke are provided with avoidance openings along the inner side surface of the circumference, and the outer side surfaces of the two ends of the roller core are matched with the avoidance openings.

Preferably, the side surfaces of the two ends of the mandrel are fixedly connected with positioning pins, the positioning pins are arranged in parallel with the locking bolts, positioning holes are formed in the inner surface of the clamping groove opening, and the positioning pins are matched with the positioning holes.

Preferably, the lock bearing is a needle thrust bearing.

The utility model provides a mecanum wheel in adjustable bearing clearance. The method has the following beneficial effects: the roller assembly integrated structure is adopted, after the left spoke, the right spoke and the middle hub are installed, the whole roller assembly is placed into the clamping notch, then the roller assembly is locked and fixed through the locking bolt, the position of the bearing pressing block is adjusted through the adjusting bolt, and the bearing pressing block exerts force on the locking bearing, so that the gap of the locking bearing can be adjusted to a required gap; each roller assembly only needs two locking bolts for fastening, and is integrally installed and disassembled, so that the roller assembly is convenient to replace; the clearance of the locking bearing can be adjusted in advance through the pressing blocks at the two ends, so that field debugging is not needed, and the time and the cost are saved; clamping notches are reserved in the left spoke and the right spoke, the diameter of a mandrel of the roller assembly is 50% -80% larger than that of a mandrel of an existing device, and the bearing capacity of the Mecanum wheel is greatly improved.

Drawings

In order to more clearly illustrate the present invention or the technical solutions in the prior art, the drawings used in the description of the prior art will be briefly described below.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of a front view of the present invention;

FIG. 3 is a schematic structural view of the front section of the present invention;

FIG. 4 is a schematic view of the roller assembly of the present invention;

FIG. 5 is a schematic structural view of a cross-sectional view of a roller assembly according to the present invention;

FIG. 6 is a schematic left side view of the present invention;

fig. 7 is a schematic structural view of the left spoke and the right spoke of the present invention;

the reference numbers in the figures illustrate:

1. a left spoke; 2. a right spoke; 3. an intermediate hub; 4. a roller assembly; 5. clamping the notch; 6. a mandrel; 7. a roll core; 8. locking the bearing; 9. a bearing compression block; 10. adjusting the bolt; 11. locking the bolt; 12. locking the screw hole; 13. spoke positioning pins; 14. the bearing compresses the gasket; 15. fixing the bolt; 16. positioning pins; 17. positioning holes; 18. a rubber layer; 19. avoiding the mouth.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the drawings of the present invention will be combined below to clearly and completely describe the technical solutions of the present invention.

In a first embodiment, as shown in fig. 1 to 7, a mecanum wheel with an adjustable bearing gap comprises a left spoke 1, a right spoke 2, a middle hub 3 and a roller assembly 4, wherein the left spoke 1 and the right spoke 2 are fixedly connected to two sides of the middle hub 3 through fixing bolts 15, spoke positioning pins 13 are movably connected to the outer side surfaces of the left spoke 1 and the right spoke 2, and the spoke positioning pins 13 penetrate through the surfaces of the left spoke 1 and the right spoke 2 and are movably connected inside the middle hub 3; the left spoke 1 and the right spoke 2 are respectively and uniformly provided with a clamping notch 5 along the circumferential surface, and a locking screw hole 12 is arranged in the clamping notch 5; the roller assembly 4 comprises a mandrel 6, a roller core 7 and locking bearings 8, the locking bearings 8 are fixedly installed at two ends of the roller core 7, the mandrel 6 penetrates into the middle of the roller core 7 and is fixedly connected with the roller core 7, the diameter of the mandrel 6 is 50% -80% larger than that of a mandrel in an existing Mecanum wheel, bearing compression blocks 9 are arranged at two ends of the mandrel 6, the two bearing compression blocks 9 are fixed at two end faces of the mandrel 6 through adjusting bolts 10 respectively, and compression end faces of the bearing compression blocks 9 are in contact with the locking bearings 8; the both ends of dabber 6 are placed respectively in the joint notch 5 on

left spoke

1 and 2 circumferential surfaces of right spoke, and the side surface of dabber 6 both ends all sets up threaded hole, and threaded hole female connection has locking bolt 11, and two locking bolt 11 respectively with the locking screw 12 threaded connection in the joint notch 5 on left spoke 1 and 2 circumferential surfaces of right spoke.

During assembly, the left spoke 1 and the right spoke 2 are mounted on both sides of the middle hub 3, the positioning is carried out through a spoke positioning pin 13, the left spoke 1 and the right spoke 2 are locked and fixed through a fixing bolt 15, the roller component 4 is placed between the left spoke 1 and the right spoke 2, two ends of the roller component 4 are respectively placed in clamping notches 5 on the circumferential surfaces of the left spoke 1 and the right spoke 2, and the locking bolt 11 is matched with a locking screw hole 12 in the clamping notches 5, namely, the two ends of the roller component 4 can be fixed through the two locking bolts 11, so that the installation, the disassembly and the replacement are very convenient, in addition, as the locking bolt 11 is arranged on the side surface of the mandrel 6, the diameter of the mandrel 6 in the application can be 50% -80% larger than that of the mandrel of the existing Mecanum wheel, so that the bearing capacity of the Mecanum wheel is greatly enhanced; and through the effect that the bearing compact heap 9 compresses tightly the terminal surface and contacts with locking bearing 8 to can adjust bearing compact heap 9 through rotating adjusting bolt 10, rethread bearing compact heap 9 is to locking bearing 8 effort, thereby makes locking bearing 8's clearance accessible bearing compact heap 9 at both ends adjust in advance, need not the field adjustment, save time and cost, and the elasticity of locking bearing 8 is adjustable can increase of service life greatly.

In the second embodiment, based on the further improvement of the first embodiment, a bearing compression gasket 14 is arranged between the end surfaces of the bearing compression block 9, which are in contact with the locking bearing 8, and the bearing compression block 9 is sleeved on the surface of the mandrel 6 and is in contact with the end surface of the locking bearing 8. So that the stress of the lock bearing 8 can be more balanced by the bearing pressing washer 14.

In the third embodiment, based on the further improvement of the first embodiment, the outer surface of the roller core 7 is coated with a rubber layer 18. To ensure that the roller assembly 4 has a certain elastic force, thereby protecting the internal parts of the roller assembly 4.

In the fourth embodiment, based on the further improvement of the first embodiment, the left spoke 1 and the right spoke 2 are both provided with avoidance openings 19 along the inner side surfaces of the circumference, and the outer side surfaces of the two ends of the roller core 7 are matched with the avoidance openings 19; the side surfaces of the two ends of the core shaft 6 are fixedly connected with positioning pins 16, the positioning pins 16 are arranged in parallel with the locking bolts 11, positioning holes 17 are formed in the inner surface of the clamping groove opening 5, and the positioning pins 16 are matched with the positioning holes 17. Make between the roller subassembly 4 through dodging in mouthful 19 puts into joint notch 5 with both ends to through locating pin 16 and locating hole 17 assorted effect, thereby make dabber 6 both ends can accurate positioning when putting into joint notch 5.

In the fifth embodiment, based on the further improvement of the first embodiment, the lock bearing 8 is a needle thrust bearing, and may also be a bearing combination of other forms.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. The utility model provides a mecanum wheel of adjustable bearing clearance, includes left spoke (1), right spoke (2), middle wheel hub (3) and roller assembly (4), its characterized in that: the middle hub (3) is fixedly arranged between the left spoke (1) and the right spoke (2), clamping notches (5) are respectively and uniformly formed in the circumferential surfaces of the left spoke (1) and the right spoke (2), and locking screw holes (12) are formed in the clamping notches (5); the roller assembly (4) comprises a mandrel (6), a roller core (7) and locking bearings (8), the locking bearings (8) are fixedly installed at two ends of the roller core (7), the mandrel (6) penetrates into the middle of the roller core (7) and is fixedly connected with the roller core (7), bearing pressing blocks (9) are arranged at two ends of the mandrel (6), the two bearing pressing blocks (9) are respectively fixed on two end faces of the mandrel (6) through adjusting bolts (10), and pressing end faces of the bearing pressing blocks (9) are in contact with the locking bearings (8); the both ends of dabber (6) are placed respectively in joint notch (5) on left spoke (1) and right spoke (2) circumference surface, dabber (6) both ends side surface all sets up threaded hole, threaded hole female connection has locking bolt (11), two locking bolt (11) respectively with locking screw (12) threaded connection in left spoke (1) and right spoke (2) circumference surface joint notch (5).

2. A variable bearing gap mecanum wheel as claimed in claim 1, wherein: left side spoke (1) and right spoke (2) are all through fixing bolt (15) fixed connection in middle wheel hub (3) both sides, the equal swing joint in left side spoke (1) and right spoke (2) outside surface has spoke locating pin (13), spoke locating pin (13) pass left spoke (1) and right spoke (2) surface to swing joint is inside in middle wheel hub (3).

3. A variable bearing gap mecanum wheel as claimed in claim 1, wherein: a bearing pressing gasket (14) is arranged between the end faces, contacted with the locking bearing (8), of the bearing pressing block (9), and the bearing pressing block (9) is sleeved on the surface of the core shaft (6) and contacted with the end face of the locking bearing (8).

4. A variable bearing gap mecanum wheel as claimed in claim 1, wherein: the outer surface of the roller core (7) is coated with a rubber layer (18).

5. A variable bearing gap mecanum wheel as claimed in claim 1, wherein: left side spoke (1) and right spoke (2) have all been seted up along circumference inboard surface and have been dodged the mouth, roller core (7) both ends outside surface with dodge mouthful phase-match.

6. A variable bearing gap mecanum wheel as claimed in claim 1, wherein: the clamping mechanism is characterized in that positioning pins (16) are fixedly connected to the side surfaces of the two ends of the core shaft (6), the positioning pins (16) are arranged in parallel with the locking bolts (11), positioning holes (17) are formed in the inner surface of the clamping groove opening (5), and the positioning pins (16) are matched with the positioning holes (17).

7. A variable bearing gap mecanum wheel as claimed in claim 1, wherein: the locking bearing (8) is a needle roller thrust bearing.