CN218661149U - Caster wheel - Google Patents

Abstract

The utility model relates to a wheel field specifically discloses a truckle, and it includes hollow bracket and rotates the gyro wheel that sets up on hollow bracket, still includes brake spare and articulated shaft, brake spare is including swing piece and the brake lever of connection on swing piece, the articulated shaft runs through and rotates the setting on swing piece and hollow bracket, the brake lever is eccentric setting with the articulated shaft, be provided with a plurality of brake blocks on the gyro wheel, each the brake block is arranged around the axis of gyro wheel, and is adjacent the interval of brake block is less than the cross-sectional width of brake lever, offer on the terminal surface of the adjacent brake block of brake block orientation and be used for supplying the brake lever tip to insert the brake groove of establishing, the brake lever can deform. This application has the effect of simplifying the structure of the truckle of taking the brake function.

Description

Caster wheel

Technical Field

The application relates to the field of wheels, in particular to a caster wheel.

Background

With the development of modern society, the number of devices and objects needing to be moved is gradually increased, and the appearance of the caster wheel brings great convenience to the movement of objects.

The hollow caster is one of casters, and is commonly used in sickbeds and the like. Compared with the caster with the shaft, the stability of the hollow caster structure is higher, and the hollow caster is easier to roll. In the related art, the hollow caster includes a bracket and a roller rotatably disposed on the bracket.

With respect to the related art in the above, the inventors consider that: after the object is moved, the caster needs to be fixed. In order to realize the effect of brake fixation, a brake piece is required to be installed on a bracket of the caster wheel, and a matching piece which is in brake fixation matching with the brake piece is arranged on a roller of the caster wheel, so that the structure of the caster wheel is complicated and needs to be improved.

SUMMERY OF THE UTILITY MODEL

In order to simplify the structure of a caster having a braking function, the present application provides a caster.

The application provides a truckle adopts following technical scheme:

the utility model provides a truckle, includes hollow bracket and rotates the gyro wheel that sets up on hollow bracket, still includes brake spare and articulated shaft, the brake spare is including swing piece and the brake lever of connection on swing piece, the articulated shaft runs through and rotates the setting on swing piece and hollow bracket, the brake lever is eccentric settings with the articulated shaft, be provided with a plurality of brake blocks on the gyro wheel, each the brake block is arranged around the axis of gyro wheel, and is adjacent the interval of brake block is less than the cross-sectional width of brake lever, offer on the terminal surface of the adjacent brake block of brake block orientation and be used for supplying the brake lever tip to insert the brake groove of establishing, the brake lever can deform.

By adopting the technical scheme, when the brake piece is installed, the hinged shaft is inserted into the swinging block and the hollow bracket, so that the brake piece is rotatably arranged on the hollow bracket. When fixing this application truckle, even the gyro wheel is fixed relative hollow support, through rotating the swing piece, because the brake lever is eccentric setting with the articulated shaft for the swing piece can swing the brake lever and remove. The end part of the brake rod is deformed and enters between two adjacent brake blocks until the end part of the brake rod is inserted into the brake groove and restored. So set up, need not additionally to install on the gyro wheel and brake piece complex fitting piece, only need when the preparation gyro wheel directly on the gyro wheel shaping brake block can for this application truckle is when having brake function, simple structure is compact.

Optionally, an outer convex arc stop block is arranged on the end surface of each brake block facing the adjacent brake block, the distance between the outer convex arc stop blocks on the two adjacent brake blocks is smaller than the width of the cross section of the brake rod, and the outer convex arc stop block is located at one end, far away from the axis of the roller, of each brake block.

By adopting the technical scheme, the outer convex arc stop blocks are positioned at one ends of the brake blocks far away from the axis of the roller, and the distance between the outer convex arc stop blocks on the adjacent brake blocks is smaller than the section width of the brake rod, so that the end parts of the brake rods can be collided with the outer convex arc stop blocks before moving into the brake groove. The convex arc stop block plays a limiting role on the one hand for the brake rod, limits the moving-out of the end part of the brake rod from the brake groove, and plays a guiding role on the other hand, thereby being beneficial to the moving-in of the end part of the brake rod into the brake groove.

Optionally, an inner convex arc stop block is arranged on the end surface of each brake block facing the adjacent brake block, the distance between the two adjacent inner convex arc stop blocks on the brake blocks is smaller than the width of the cross section of the brake rod, and the inner convex arc stop block is located at one end, close to the axis of the roller, of each brake block.

Through adopting above-mentioned technical scheme, because interior convex arc dog is located the one end that the brake block is close to the gyro wheel axis, and the interval of interior convex arc dog on the adjacent brake block is less than the cross-sectional width of brake lever to continue to rotate to shifting out the brake groove after the tip of restriction brake lever moved into the brake groove, the condition of avoiding directly shifting out the brake groove after the tip immigration brake groove of brake lever because of swing piece amplitude of rotation is too big takes place, stability when having improved this application truckle is in the brake stationary state.

Optionally, the distance between the axis of the hinge shaft and the axis of the roller is smaller than the distance between the brake block and the axis of the roller.

Through adopting above-mentioned technical scheme, the first aspect has improved the stability when braking piece rotates, and the second aspect makes the articulated department of hollow support and braking piece be close to the axis of gyro wheel as far as possible, keeps away from the outside of hollow support promptly, has effectively ensured the structural strength of the articulated department of hollow support and braking piece.

Optionally, the brake spare still includes the gear piece, the locking groove has been seted up on the hollow support, the tip that the locking groove is used for supplying the gear piece is inserted and is established, the gear piece can deform, when the tip of brake lever is inserted and is established in one of them brake groove, the tip of gear piece is inserted and is established in the locking groove.

Through adopting above-mentioned technical scheme, swing piece drives gear piece and brake lever when rotating and rotates, and when swing piece rotated to the tip of brake lever and inserted locking groove, the gear piece removed to self tip and inserts and establish in the locking groove, restriction brake spare is relative hollow support rotates promptly. Compared with the situation that the wheel is locked only through the matching of the brake groove and the brake rod, the wheel is further limited to rotate relative to the hollow support through the matching of the gear block and the locking groove, and the stability of the wheel in a brake fixing state is improved.

Optionally, the end portion of the hollow support, which is used for supplying the gear block, is provided with an unlocking groove in an inserted manner, the hollow support is provided with a limiting protrusion, the unlocking groove, the limiting protrusion and a locking groove are sequentially arranged along the rotation direction of the gear block, the maximum distance between the limiting protrusion and the hinge shaft is greater than the distance between the gear block and the hinge shaft, and when the end portion of the gear block is inserted into the unlocking groove, the brake rod and the locking groove are staggered.

By adopting the technical scheme, when the roller is normally rotated, the swinging block is rotated to move the gear block until the end part of the gear block is inserted into the unlocking groove, so that the brake piece is limited to move relative to the hollow support, and the brake rod and the locking groove are staggered at the moment. So set up, the brake lever produces the interference to the gyro wheel when having avoided the gyro wheel to normally rotate as far as possible, helps the gyro wheel to normally rotate. The limiting protrusion limits the end part of the swinging block to move from the unlocking groove to the locking groove or from the locking groove to the unlocking groove, and is beneficial to keeping the end part of the brake lever inserted in the brake groove or staggered with the brake groove.

Optionally, the hollow support includes the support body and connects the bobbin spindle on the support body, the cover is equipped with the bearing on the bobbin spindle, the gyro wheel is established the wheel hub on the bearing and is established the tire on the wheel hub including the cover.

Through adopting above-mentioned technical scheme, through set up the bearing in wheel hub inboard, improved wheel hub pivoted smoothness nature, help the gyro wheel to rotate. Through add the tire in the outside of wheel hub, on the one hand played the effect of protection to wheel hub, and on the other hand has improved the stability when the removal of this application truckle.

Optionally, the circumferential outer wall of the hub is provided with a slip-stopping protrusion, and the slip-stopping protrusion is embedded in the tire.

By adopting the technical scheme, when the tire is installed, the tire is sleeved on the wheel hub and the anti-slip bulges, and the anti-slip bulges are embedded in the tire so as to deform the tire and wrap the anti-slip bulges. The tire is limited to move relative to the hub through the anti-slip bulges, so that the caster is not easy to slip in situ when rotating.

Optionally, the anti-slip protrusion includes a connecting portion, a first anti-slip portion and a second anti-slip portion, the connecting portion is connected to the hub, the first anti-slip portion and the second anti-slip portion are respectively connected to different sidewalls of the connecting portion, and a sidewall of the connecting portion having the first anti-slip portion faces perpendicular to a sidewall of the connecting portion having the second anti-slip portion.

By adopting the technical scheme, when the tire is installed, the end part of the connecting part, the first anti-slip part and the second anti-slip part are embedded in the tire. The side wall of the connecting part provided with the first anti-slip part faces to be vertical to the side wall of the connecting part provided with the second anti-slip part, so that the first anti-slip part and the second anti-slip part can limit the tire to move relative to the hub along each direction vertical to the extending direction of the connecting part, and further limit the tire to move relative to the hub.

Optionally, an end cover is arranged on the barrel shaft, the end cover comprises a connecting barrel inserted in the barrel shaft and a baffle connected to the connecting barrel, the baffle is located on one side, away from the support body, of the bearing, a clamping block is arranged on the outer wall of the connecting barrel, and a clamping groove matched with the clamping block in a clamping mode is formed in the inner wall of the barrel shaft.

Through adopting above-mentioned technical scheme, during the installation end cover, aim at the draw-in groove with the fixture block earlier, then insert the connecting cylinder in the section of thick bamboo axle, until fixture block and draw-in groove joint cooperation, so set up, the end cover installation of being convenient for. The baffle is positioned on one side of the bearing far away from the bracket body to prevent dust and other dirt from entering the bearing from the side direction, so that the bearing is protected.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the brake block is directly formed on the hub and matched with the brake piece, so that the caster wheel has a brake function and is simple and compact in structure;

2. the rotation of the swing block and the brake rod when the caster is in a braking state and a braking releasing state is limited through the matching block, the locking groove and the unlocking groove, so that on one hand, the stability of the brake rod when the brake rod moves into the braking groove is improved, the effect of brake fixing is improved, and on the other hand, the interference of the brake rod on the normal rotation of the roller is avoided as much as possible;

3. the tire is limited to move relative to the hub through the anti-slip bulges, so that the caster is not easy to slip in situ.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present application.

Fig. 2 is an exploded view of an embodiment of the present application.

Fig. 3 is a schematic structural view of a highlighted hub in the embodiment of the present application.

Fig. 4 is a schematic structural diagram of the embodiment of the present application with one of the rollers removed.

Figure 5 is an exploded view of the highlighted brake piece and rotating slot in the embodiment of the present application.

FIG. 6 is a schematic cross-sectional view of the embodiment of the present application highlighting the insertion of the brake lever in the brake slot.

Description of reference numerals:

1. a hollow support; 11. a stent body; 111. a rotating groove; 112. hinging a shaft; 113. unlocking the groove; 114. a locking groove; 115. a limiting bulge; 12. a barrel shaft; 121. a card slot; 13. a bearing; 14. an end cap; 141. a baffle plate; 142. a connecting cylinder; 1421. a clamping block; 2. a connecting shaft; 3. a roller; 31. a hub; 311. the anti-slip bulge is arranged; 3111. a connecting portion; 3112. a first slip prevention part; 3113. a second slip prevention part; 312. a brake block; 3121. a brake groove; 3122. a convex arc stop block; 3123. an inward convex arc stop block; 32. a tire; 4. a braking member; 41. a swing block; 42. a pressing block; 43. a brake lever; 44. and a gear block.

Detailed Description

The present application is described in further detail below with reference to figures 1-6.

The embodiment of the application discloses a caster. Referring to fig. 1, the caster comprises a hollow bracket 1, a connecting shaft 2 arranged on the hollow bracket 1, two rollers 3 symmetrically arranged, and a braking member 4 for fixing the rollers 3 and the hollow bracket 1 relatively.

Referring to fig. 2, the hollow bracket 1 includes a bracket body 11 and two cylinder shafts 12 symmetrically disposed, the bracket body 11 and the two cylinder shafts 12 are integrally formed by plastic, and the connecting shaft 2 is fixed on the bracket body 11.

Referring to fig. 2, the two rollers 3 are respectively disposed on different shafts 12, and the rollers 3 include a hub 31 and a tire 32 mounted on the hub 31. The two cylindrical shafts 12 are respectively provided with a bearing 13 and an end cover 14, the inner ring of the bearing 13 is sleeved and fixed on the cylindrical shafts 12, and the hub 31 is sleeved and fixed on the outer ring of the bearing 13.

Referring to fig. 2 and 3, a plurality of anti-slip protrusions 311 are integrally formed on the circumferential outer wall of the hub 31, and the anti-slip protrusions 311 are circumferentially and uniformly distributed around the axis of the hub 31. The anti-slip protrusion 311 includes a connecting portion 3111, two first anti-slip portions 3112 and two second anti-slip portions 3113. The first anti-slip portion 3112 and the second anti-slip portion 3113 are integrally formed on different sidewalls of the connection portion 3111, and a sidewall of the connection portion 3111 where the first anti-slip portion 3112 is disposed is perpendicular to a sidewall of the connection portion 3111 where the second anti-slip portion 3113 is disposed. The tire 32 is made of rubber so that the tire 32 can be deformed, and the end of the connecting portion 3111, the first slip stopper 3112, and the second slip stopper 3113 are embedded in the tire 32.

Referring to fig. 3, a plurality of brake pads 312 are integrally formed on an end surface of the hub 31 facing the bracket body 11, and the brake pads 312 are circumferentially and uniformly distributed around an axis of the hub 31. Brake block 312 has seted up brake groove 3121 towards adjacent on inserting the terminal surface of piece, and brake block 312 has evagination arc dog 3122 and interior arch dog 3123 towards integrated into one piece on the terminal surface of adjacent brake block 312, and evagination arc dog 3122 is located the one end that brake block 312 keeps away from wheel hub 31 axis, and interior arch dog 3123 is located the one end that brake block 312 is close to wheel hub 31 axis.

Referring to fig. 2 and 4, the end cap 14 includes a baffle 141 and a connecting cylinder 142 connected to the baffle 141 at one end, and the baffle 141 and the connecting cylinder 142 are integrally formed by plastic. The connecting cylinder 142 is inserted into the cylinder shaft 12, two engaging blocks 1421 are integrally formed on an outer wall of the connecting cylinder 142, and the two engaging blocks 1421 are circumferentially and uniformly distributed around an axis of the connecting cylinder 142. Two clamping grooves 121 are formed in the inner wall of the barrel shaft 12, the clamping grooves 121 are circumferentially and uniformly distributed around the axis of the barrel shaft 12, and the clamping grooves 121 are used for being matched with clamping blocks 1421 on the two connecting barrels 142 in a clamping mode. The baffle 141 is annular, the hub 31 is sleeved on the baffle 141, and the baffle is located on one side of the bearing 13 away from the bracket body 11.

Referring to fig. 5, the brake 4 comprises a swing block 41, a pressing block 42, a brake lever 43 and two shift blocks 44, the pressing block 42, the brake lever 43 and the two shift blocks 44 are all connected to the swing block 41, and the pressing block 42 is located on one side of the roller 3 away from the axis of the roller. The two shift blocks 44 are symmetrically arranged, and the two shift blocks 44 are respectively located at two sides of the swinging block 41. The swing block 41, the pressing block 42, the brake lever 43, and the two shift blocks 44 are integrally molded from plastic, and the brake lever 43 and the two shift blocks 44 can be deformed and restored.

Referring to fig. 4 and 5, the holder body 11 is provided with a rotation groove 111, and the end of the swing block 41 is located in the rotation groove 111 and rotates in the rotation groove 111. Be provided with articulated shaft 112 on the support body 11, articulated shaft 112 runs through and rotates the setting on support body 11 and turning block, and articulated shaft 112 stretches into to rotating groove 111, and gear piece 44 and brake lever 43 all are eccentric settings with articulated shaft 112, and the interval of the axle center of articulated shaft 112 and gyro wheel 3 axis is less than the interval of brake block 312 and gyro wheel 3 axis.

Referring to fig. 3 and 5, the distance between adjacent brake pads 312 is smaller than the diameter of the brake lever 43, and the brake groove 3121 is used for the insertion of the end of the brake lever 43. The spacing between the convex arc stops 3122 on two adjacent brake blocks 312 is less than the diameter of the brake lever 43 and the spacing between the convex arc stops 3123 on two adjacent brake blocks 312 is less than the diameter of the brake lever 43.

Referring to fig. 6, the bracket body 11 is provided with an unlocking groove 113 and a locking groove 114, and the unlocking groove 113 and the locking groove 114 are used for inserting the end of the shift block 44. The bracket is integrally formed with a limiting protrusion 115, an unlocking groove 113, the limiting protrusion 115 and a locking groove 114 are sequentially arranged along the rotation direction of the gear block 44, and the maximum distance between the limiting protrusion 115 and the hinge shaft 112 is larger than the distance between the gear block 44 and the hinge shaft 112. When the end of the gear block 44 is inserted into the unlocking groove 113, the brake lever 43 is staggered with the brake groove 3121; when the end of the brake lever 43 is inserted into one of the brake grooves 3121, the end of the shift position block 44 is inserted into the locking groove 114.

The implementation principle of the caster of the embodiment of the application is as follows: when assembling the caster of this application, establish earlier the inner circle cover of bearing 13 and fix on the axle sleeve, then establish hub 31 cover and fix on the outer lane of bearing 13, establish tire 32 cover on hub 31 after that, insert the connecting cylinder 142 in the section of thick bamboo axle 12 and with fixture block 1421 and draw-in groove 121 joint cooperation can at last.

When the caster of the application is fixed, the pressing block 42 is pressed downwards to move so as to drive the swinging block 41 to rotate, the swinging block 41 drives the brake rod 43 and the gear block 44 to move, the end part of the gear block 44 passes through the limiting protrusion 115 and moves into the locking groove 114, and the end part of the brake rod 43 passes through the outer arc-shaped protrusion and moves into the brake groove 3121, so that the rotation of the roller 3 relative to the hollow bracket 1 is limited. When unlocking, the pressing block 42 is lifted upwards, so that the end of the gear block 44 moves into the unlocking groove 113, and the end of the brake lever 43 moves out of the brake groove 3121.

Through above-mentioned structure for this application truckle when having the brake function, simple structure is compact.

The above are preferred embodiments of the present application, and the scope of protection of the present application is not limited thereto, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (10)

1. The utility model provides a caster, includes hollow bracket (1) and rotates gyro wheel (3) of setting on hollow bracket (1), its characterized in that: still include brake spare (4) and articulated shaft (112), brake spare (4) are including swing piece (41) and brake lever (43) of connection on swing piece (41), articulated shaft (112) run through and rotate the setting on swing piece (41) and hollow bracket (1), brake lever (43) are eccentric settings with articulated shaft (112), be provided with a plurality of brake blocks (312) on gyro wheel (3), each brake block (312) are arranged around the axis of gyro wheel (3), and are adjacent the interval of brake block (312) is less than the cross-sectional width of brake lever (43), brake block (312) offer on the terminal surface towards adjacent brake block (312) and are used for supplying brake lever (43) tip to insert brake groove (3121) of establishing, brake lever (43) can deform.

2. A castor according to claim 1, wherein: the end faces, facing to the adjacent brake blocks (312), of the brake blocks (312) are provided with convex arc stoppers (3122), the distance between the convex arc stoppers (3122) on the two adjacent brake blocks (312) is smaller than the section width of the brake lever (43), and the convex arc stoppers (3122) are positioned at one ends, far away from the axis of the roller (3), of the brake blocks (312).

3. A castor according to claim 1, wherein: an inner convex arc stop block (3123) is arranged on the end face of each brake block (312) facing the adjacent brake block (312), the distance between the inner convex arc stop blocks (3123) on the two adjacent brake blocks (312) is smaller than the section width of the brake rod (43), and the inner convex arc stop blocks (3123) are positioned at one end of each brake block (312) close to the axis of the roller (3).

4. A castor according to claim 1, wherein: the distance between the axis of the articulated shaft (112) and the axis of the roller (3) is smaller than the distance between the brake block (312) and the axis of the roller (3).

5. A castor according to claim 1, wherein: brake piece (4) still include gear piece (44), locking groove (114) have been seted up on hollow support (1), locking groove (114) are used for supplying the tip of gear piece (44) to insert and establish, gear piece (44) can deform, when the tip of brake lever (43) is inserted and is established in one of them brake groove (3121), the tip of gear piece (44) is inserted and is established in locking groove (114).

6. A castor according to claim 5, wherein: offer the tip that is used for supplying gear piece (44) on hollow bracket (1) and insert and establish unlocking groove (113), be provided with spacing arch (115) on hollow bracket (1), unlocking groove (113), spacing arch (115) and locking groove (114) are arranged along the rotation direction of gear piece (44) in proper order, the maximum interval of spacing arch (115) and articulated shaft (112) is greater than the interval of gear piece (44) and articulated shaft (112), when the tip of gear piece (44) is inserted and is established in unlocking groove (113), brake lever (43) stagger with locking groove (114).

7. A castor according to claim 1, wherein: hollow support (1) includes support body (11) and connects bobbin (12) on support body (11), the cover is equipped with bearing (13) on bobbin (12), gyro wheel (3) are established wheel hub (31) on bearing (13) and are established tire (32) on wheel hub (31) including the cover.

8. A castor according to claim 7, wherein: the anti-slip wheel is characterized in that anti-slip protrusions (311) are arranged on the circumferential outer wall of the wheel hub (31), and the anti-slip protrusions (311) are embedded in a tire (32).

9. A castor according to claim 8, wherein: protruding (311) of limited slip includes connecting portion (3111), first limited slip portion (3112) and second limited slip portion (3113), connecting portion (3111) are connected on wheel hub (31), first limited slip portion (3112) and second limited slip portion (3113) are connected respectively on the different lateral walls of connecting portion (3111), connecting portion (3111) are equipped with the lateral wall orientation of first limited slip portion (3112) and are perpendicular with the lateral wall orientation that connecting portion (3111) is equipped with second limited slip portion (3113).

10. A castor according to claim 7, wherein: the end cover (14) is arranged on the barrel shaft (12), the end cover (14) comprises a connecting barrel (142) inserted into the barrel shaft (12) and a baffle plate (141) connected to the connecting barrel (142), the baffle plate (141) is located on one side, away from the support body (11), of the bearing (13), a clamping block (1421) is arranged on the outer wall of the connecting barrel (142), and a clamping groove (121) in clamping fit with the clamping block (1421) is formed in the inner wall of the barrel shaft (12).

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