CN212708742U - Damping caster device - Google Patents

Abstract

The utility model discloses a shock attenuation truckle device, it includes first wheel carrier, second wheel carrier, wheel body and second brake subassembly. The first wheel carrier is provided with a first brake assembly, the second wheel carrier comprises a wheel carrier main body, a connecting rod piece and an elastic assembly, the wheel carrier main body is connected with the first wheel carrier and can rotate around a first axis, the wheel carrier main body is provided with a first stopping structure, the connecting rod piece is connected with the wheel carrier main body and can rotate around a second axis, the elastic assembly is arranged between the connecting rod piece and the wheel carrier main body, the second brake assembly is arranged on the second wheel carrier, and the second brake assembly is linked with the first brake assembly. The wheel body is connected with the connecting rod piece so as to rotate around a third axis. The wheel body and the connecting rod piece can swing to adapt to the fluctuation of the ground, so that the vibration of the equipment is avoided, and the equipment is kept stable in the moving process; when the first brake assembly acts, the second brake assembly can act, the brake locking of the caster wheel device is completed, and the brake operation of a user is facilitated.

Description

Damping caster device

Technical Field

The utility model relates to the technical field of transportation, in particular to truckle device.

Background

Some conventional casters generally have multiple degrees of freedom in rotation in order to accommodate movement of the equipment they carry, for example, the wheels of some casters may rotate, and the wheel frames of the casters may also rotate relative to the equipment they carry. Under a common condition, in order to lock the brake of the caster, two sets of brake devices need to be arranged on the caster, wherein one set of brake device is used for limiting the rotation of the caster body, the other set of brake device is used for limiting the rotation of the wheel frame, the two sets of brake devices are independently arranged, and a user needs to respectively operate the two sets of brake devices, so that the brake operation of the user is not convenient enough. In addition, during the movement of the equipment, the caster device often encounters uneven ground, which causes the equipment to vibrate.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a shock attenuation truckle device can reduce the vibrations of its equipment that bears, and the user's of being convenient for brake operation.

According to the utility model discloses a shock attenuation truckle device of embodiment, it includes: the first wheel carrier is provided with a first brake component; the second wheel frame comprises a wheel frame main body, a connecting rod piece and an elastic component, the wheel frame main body is connected with the first wheel frame so as to rotate around a first axis, a first stopping structure is arranged on the wheel frame main body, the connecting rod piece is connected with the wheel frame main body so as to swing around a second axis, the second axis is perpendicular to the first axis, and the elastic component is arranged between the connecting rod piece and the wheel frame main body; the second brake assembly is arranged on the second wheel carrier and is linked with the first brake assembly; the wheel body is connected with the connecting rod piece so as to be capable of rotating around a third axis, the third axis is parallel to the second axis, and a second stop structure is arranged on the wheel body; when the first brake component acts, the first brake component can be matched with the first stop structure to limit the rotation of the wheel frame main body, and the second brake component can be matched with the second stop structure to limit the rotation of the wheel body.

According to the utility model discloses shock attenuation truckle device has following beneficial effect at least: through the structure, when the equipment encounters uneven ground, the wheel body and the connecting rod piece can swing along with the wheel body and the connecting rod piece to adapt to the fluctuation of the ground, so that the vibration of the equipment is avoided, and the equipment is kept stable in the moving process; the second brake component is linked with the first brake component, and the second brake component can move when the first brake component moves, so that the second wheel frame can be limited to rotate relative to the first wheel frame and the wheel body relative to the second wheel frame, the brake locking of the caster device is completed, a user does not need to operate the first brake component and the second brake component respectively, and the brake operation of the user is facilitated.

According to some embodiments of the present invention, the first brake assembly includes a toggle member, a brake lever, and a positioning block, the toggle member is in transmission connection with the brake lever to be able to drive the brake lever to move along the first axis, the positioning block is fixedly disposed on the brake lever, and the positioning block has a plurality of first stop tooth portions arranged around the first axis; the first stop structure comprises a second stop tooth portion, the second stop tooth portion and the first stop tooth portion being aligned along the first axis; the brake lever is movable along the first axis to move the first stop tooth portion into engagement with the second stop tooth portion and to engage the second brake assembly with the second stop structure to limit rotation of the wheel body.

According to some embodiments of the present invention, the positioning block has a first locking portion thereon, a cross-sectional profile of the first locking portion is non-circular, and the first locking portion and the first stop tooth portion are arranged along the first axis; the first stopping structure further comprises a stopping piece arranged on the wheel frame main body, and a first stopping hole matched with the first stopping part is formed in the stopping piece.

According to some embodiments of the utility model, the stopper is inserted and is located the wheel carrier main part, the lateral wall of stopper with either one of them is equipped with first spacing groove of wheel carrier main part, and the other is equipped with first spacing portion, first spacing portion is located first spacing groove.

According to some embodiments of the utility model, a serial communication port, elastic component includes the adhesive tape, be equipped with in the wheel carrier main part and follow the first shaft hole that the second axis was arranged, the lateral wall in first shaft hole has first storage tank, it rotationally inserts and locates to have on the connecting rod spare the first axial region in first shaft hole, the lateral wall in first axial region have with the second storage tank that first storage tank is relative, the adhesive tape insert locate first storage tank with the second storage tank.

According to some embodiments of the utility model, have in the wheel carrier main part around the guide slot that the second axis was arranged, have on the connecting rod piece to insert and locate the guide part of guide slot, elastic component is still including locating shock attenuation elastic component in the wheel carrier main part, shock attenuation elastic component is located the tip of guide slot.

According to some embodiments of the present invention, the brake lever has a second locking portion thereon, the second brake assembly includes a brake block, a first gear and a first elastic member, the brake block is slidably disposed on the wheel carrier body, and one side of the brake block has a brake tooth portion and a stop surface cooperating with the second locking portion, the second locking portion and the stop surface are arranged along the first axis, the first gear is rotatably disposed on the connecting rod and arranged along the second axis, the first elastic member is disposed between the other side of the brake block and the wheel carrier body; the second stop structure comprises a second gear fixedly connected with the wheel body, the second gear is arranged along the third axis, and the second gear is meshed with the first gear; the brake block can engage the brake tooth portion with the first gear when moving along the wheel carrier body.

According to some embodiments of the present invention, the shifting member is rotatably disposed on the first wheel carrier, the side wall of the shifting member is provided with at least two locking grooves cooperating with the brake lever, and the depths of the at least two locking grooves are different and are arranged around the axis of the shifting member; the first brake assembly further comprises a second elastic piece, and the second elastic piece is arranged between the positioning block and the wheel carrier main body and can drive the brake lever to move towards the shifting piece along the first axis.

According to some embodiments of the utility model, first brake subassembly still includes the third elastic component, spacing head has on the brake lever, the third elastic component is located spacing head with can drive between the first wheel carrier the brake lever is followed first axis orientation the piece that dials removes.

According to some embodiments of the utility model, first wheel carrier includes shell and inner tube, it rotationally inserts and locates to dial the piece the shell, the inner tube is inserted and is located the shell and with the second wheel carrier rotates to be connected, brake lever slidable ground is inserted and is located the inner tube, third locking portion has on the locating piece, the cross section outline of third locking portion is non-circular, the inner tube have with third locking portion complex second locking hole.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a view showing the structure of one embodiment of the shock absorbing caster device of the present invention;

FIG. 2 is a cross-sectional view of the shock absorbing caster device shown in FIG. 1;

FIG. 3 is an enlarged view of portion A of FIG. 2;

FIG. 4 is an enlarged view of portion B of FIG. 2;

FIG. 5 is another cross-sectional view of the shock absorbing caster device shown in FIG. 1;

FIG. 6 is an exploded view of the shock absorbing caster device shown in FIG. 1;

FIG. 7 is an exploded view of the first wheel carrier and the first brake assembly;

fig. 8 is an exploded view of the shock absorbing caster device with the first wheel frame and the first brake assembly removed.

Reference numerals:

the first wheel frame 100, the outer shell 110, the tube shell 111, the inner tube 120, the second locking hole 121, the second wheel frame 200, the wheel frame body 210, the first limit portion 211, the first shaft hole 212, the first receiving groove 2121, the guide groove 213, the first mounting groove 214, the first bearing 215, the link member 220, the first shaft portion 221, the second receiving groove 2211, the guide portion 222, the rubber strip 231, the elastic damping member 232, the first locking structure 240, the second locking tooth portion 241, the stopper 242, the first locking hole 2421, the first limit groove 2422, the first shaft sleeve 251, the second shaft sleeve 252, the first rivet member 261, the second rivet member 262, the wheel body 300, the second gear 310, the second bearing 320, the toggle member 410, the locking groove 411, the brake lever 420, the second locking portion 421, the limit head 422, the positioning block 430, the first locking tooth portion 431, the third locking portion 432, the second elastic member 433, the third elastic member 450, the brake block 510, the second elastic member 440, the third elastic member 450, and the brake block 510, Brake tooth part 511, stop surface 512, first gear 520, second shaft part 521 and first elastic element 530

A first axis a, a second axis b, a third axis c

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, if there are first and second descriptions for distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the precedence of the indicated technical features.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

As shown in fig. 1 to 8, a shock-absorbing caster device according to an embodiment of the present invention includes a first wheel frame 100, a second wheel frame 200, a wheel body 300, a first brake assembly and a second brake assembly. The first truck 100 is used to connect devices that need to be carried.

Wherein, the first wheel frame 100 is provided with the first brake assembly. The second wheel frame 200 includes a wheel frame main body 210, a connecting rod 220 and an elastic component, wherein the wheel frame main body 210 is connected with the first wheel frame 100 and can rotate around a first axis a, that is, the wheel frame main body 210 is rotatably connected with the first wheel frame 100, a first stopping structure 240 is disposed on the wheel frame main body 210, the connecting rod 220 is connected with the wheel frame main body 210 and can rotate around a second axis b, that is, the connecting rod 220 is rotatably connected with the wheel frame main body 210, the second axis b is perpendicular to the first axis a, and the elastic component is disposed between the connecting rod 220 and the wheel frame main body 210. The second brake component is disposed on the second wheel frame 200, and the second brake component is linked with the first brake component. The wheel body 300 is connected with the connecting rod 220 to rotate around a third axis c, which is parallel to the second axis b, and the wheel body 300 has a second stop structure.

The caster wheel device is usually installed at the bottom of the equipment, when the equipment encounters uneven ground, the wheel body 300 and the connecting rod piece 220 can swing along with the equipment to adapt to the fluctuation of the ground, so that the vibration of the equipment is avoided, and the equipment is kept stable in the moving process; the second brake component is linked with the first brake component, and when the first brake component acts, the second brake component can act, so that the second wheel frame 200 can be limited to rotate relative to the first wheel frame 100 and the wheel body 300 can be limited to rotate relative to the second wheel frame 200, the brake locking of the caster device is completed, a user does not need to operate the first brake component and the second brake component respectively, and the brake operation of the user is facilitated.

Referring to fig. 2 to 7, the first brake assembly includes a toggle member 410, a brake lever 420, and a positioning block 430. The toggle element 410 is in transmission connection with the brake lever 420, the brake lever 420 is slidably disposed on the first wheel frame 100, and the toggle element 410 can drive the brake lever 420 to move along the first axis a. The positioning block 430 is fixedly disposed on the brake lever 420, and the positioning block 430 has a plurality of first stopping teeth 431 thereon, and the first stopping teeth 431 are arranged around the first axis a. The first stopper 240 includes a second stopper tooth portion 241, and the second stopper tooth portion 241 and the first stopper tooth portion 431 are aligned along the first axis a.

The toggle member 410 can drive the brake lever 420 to move along the first axis a, and when the brake lever 420 moves, the first stopping teeth 431 can be driven to move to a position where the first stopping teeth 241 are engaged, and when the first stopping teeth 431 are engaged with the second stopping teeth 241, the second wheel frame 200 can be limited to rotate relative to the first wheel frame 100. In addition, when the brake lever 420 is moved to a position where the first stopping teeth 431 are moved to engage with the second stopping teeth 241, the second brake component can be actuated to cooperate with the second stopping structure to limit the rotation of the wheel body 300 relative to the second wheel frame 200.

Wherein, the positioning block 430 and the brake lever 420 can be an integrally formed structure; or a separate structure, that is, the positioning block 430 is sleeved on the brake lever 420, and the positioning block 430 is locked on the brake lever 420 by a fastener such as a screw.

The positioning block 430 has a first locking portion 432, the cross-sectional profile of the first locking portion 432 is non-circular, and the first locking portion 432 and the first stopper tooth 431 are arranged along the first axis a. The first stopper structure 240 further includes a stopper 242 provided to the wheel frame body 210, and the stopper 242 has a first locking hole 2421 engaged with the first locking part 432.

As described above, when the brake lever 420 moves along the first axis a, when the first locking portion 432 is inserted into the first locking hole 2421, the first locking tooth 431 does not move to the position where it is engaged with the second locking tooth 241, and at this time, the second wheel frame 200 can be locked, and the second wheel frame 200 is restricted from rotating relative to the first wheel frame 100, and the wheel body 300 is not locked by the second brake assembly, so that the wheel body 300 can rotate relative to the second wheel frame 200, and thus the rotating direction of the wheel body 300 can be locked, and the moving direction of the caster device can be fixed. When the first stopping teeth 431 move to the position where the second stopping teeth 241 are engaged, both the second wheel frame 200 and the wheel body 300 can be locked, so that the rotation of the second wheel frame 200 and the wheel body 300 is limited, and the full-brake locking of the caster device is realized.

The stopper 242 is inserted into the wheel frame body 210, a first limiting groove 2422 is formed on a side wall of the stopper 242, a first limiting portion 211 is formed on the second wheel frame 200, and the first limiting portion 211 is disposed in the first limiting groove 2422, so that the stopper 242 can be limited from rotating relative to the wheel frame body 210.

It is understood that, in some embodiments, the first stopper groove 2422 may be further disposed on the wheel frame main body 210, and correspondingly, the first stopper portion 211 is disposed on the stopper 242.

In some embodiments, the stop 242 and the wheel frame body 210 may also be locked together by fasteners such as screws, rivets, etc. to limit the stop 242 from rotating relative to the wheel frame body 210; or the stopper 242 is provided as an integrally molded structure with the wheel frame body 210.

The wheel frame main body 210 is provided with a first mounting groove 214, the first wheel frame 100 is rotatably inserted into the first mounting groove 214, so that the wheel frame main body 210 is rotatably connected with the first wheel frame 100, and the first axis a passes through the center of the cross section of the first mounting groove 214. A first bearing 215 is further provided in the first mounting groove 214, and the first bearing 215 is located between the first wheel frame 100 and the wheel frame main body 210 to reduce the rotational resistance of the second wheel frame 200. The aforementioned stopper 242 and the second stopper tooth portion 241 are also provided in the first mounting groove 214.

In some embodiments, the first stopping teeth 431 may also be replaced by truncated pyramids or prisms, and correspondingly, the second stopping teeth 241 may be replaced by holes of truncated pyramids or prisms.

Referring to fig. 2, 6 and 8, the elastic member includes an adhesive strip 231 and a shock-absorbing elastic member 232. The wheel frame body 210 is provided with a first shaft hole 212 arranged along the second axis b, the link member 220 is provided with a first shaft portion 221, the first shaft portion 221 is rotatably inserted into the first shaft hole 212, a side wall of the first shaft hole 212 is provided with a first accommodating groove 2121, and a side wall of the first shaft portion 221 is provided with a second accommodating groove 2211 opposite to the first accommodating groove 2121. The adhesive strip 231 is inserted into the first receiving groove 2121 and the second receiving groove 2211, that is, a part of the adhesive strip 231 is inserted into the link member 220, and a part of the adhesive strip is inserted into the sidewall of the first shaft hole 212.

Generally, a plurality of caster devices are disposed at the bottom of the device, and when the device is used, the wheel body 300 rolls along the ground, and is pressed by the weight of the device, the connecting rod 220 swings upward to a certain position relative to the wheel frame body 210, and the rubber strip 231 deforms to store force. When a certain wheel body 300 meets a projection on the ground, the wheel body 300 is pressed on the projection, the connecting rod piece 220 and the wheel body 300 swing upwards, the rubber strip 231 further deforms to keep the equipment balanced, and after the wheel body 300 bypasses the projection, the connecting rod piece 220 and the wheel body 300 swing downwards under the action of self gravity and the elastic force of the rubber strip 231; when a certain wheel 300 meets a recess on the ground, the wheel 300 and the link member 220 swing downward under the action of their own gravity and the elastic force of the rubber strip 231, so that the wheel 300 contacts the bottom surface of the recess, the equipment can be kept in balance, and after the wheel 300 bypasses the recess, the pressure action of the weight of the equipment can make the wheel 300 and the link member 220 swing upward. Therefore, the caster wheel device can adapt to the protrusion and the depression of the ground, the stability of the equipment in the moving process is kept, and the equipment is prevented from vibrating.

The wheel frame body 210 has a guide groove 213 disposed around the second axis b, the link member 220 has a guide portion 222 inserted in the guide groove 213, the damper elastic member 232 is disposed on the wheel frame body 210, and the damper elastic member 232 is located at an end of the guide groove 213. When the guide portion 222 swings to the end of the guide groove 213, the guide portion 222 contacts with the elastic damping member 232, and the elastic damping member 232 can play a role of buffering, so as to prevent the link member 220 from rigidly colliding with the wheel frame body 210.

Wherein the elastic shock absorbing member 232 is configured as a rubber block. Of course, the damping elastic member 232 may also be provided with a compression spring, a spring plate, and the like.

In some embodiments, for the elastic assembly, a torsion spring may be provided, the torsion spring being arranged along the first axis a, one torsion arm of the torsion spring abutting against the link member 220, and the other torsion arm abutting against the wheel carrier main body 210. When the link member 220 swings, the link member 220 can be driven to swing and reset by the torsion spring.

Referring to fig. 2 to 8, the brake lever 420 has a second locking portion 421, and the second brake assembly includes a brake block 510, a first gear 520, and a first elastic member 530. The brake block 510 is slidably disposed on the wheel frame main body 210, and one side of the brake block 510 has a brake tooth portion 511 and a stop surface 512 engaged with the second locking portion 421, the second locking portion 421 and the stop surface 512 are arranged along a first axis a, the first gear 520 is rotatably disposed on the link member 220, and the first gear 520 is disposed along a second axis b, that is, the axis of the first gear 520 coincides with the second axis b. The first elastic member 530 is disposed between the other side of the brake block 510 and the wheel frame body 210. The second stopping structure includes a second gear 310 fixedly connected to the wheel body 300, the second gear 310 is arranged along a third axis c, i.e. the axis of the second gear 310 coincides with the third axis c, and the second gear 310 is meshed with the first gear 520.

When the caster device is used, the second locking portion 421 abuts against the stop surface 512 to support the brake block 510, so as to limit the movement of the brake block 510. When braking is required, the brake lever 420 is driven to move by the toggle 410 so that the first stop tooth portion 431 is engaged with the second stop tooth portion 241; the second locking portion 421 moves with the brake lever 420, and the first elastic member 530 drives the brake block 510 to move, so that the brake tooth portion 511 is engaged with the first gear 520, thereby restricting the rotation of the first gear 520 and the second gear 310, and further restricting the rotation of the wheel body 300. That is, when the first stopper teeth 431 are moved to be engaged with the second stopper teeth 241, the brake pad 510 can also be moved to a position where the brake teeth 511 are engaged with the first gear 520.

Referring to fig. 5, as an embodiment, the wheel body 300 is provided in two and is respectively disposed at two sides of the wheel frame main body 210, and the link member 220 and the first gear 520 are both provided in two. The two first gears 520 are respectively disposed at two sides of the two link members 220. A first shaft sleeve 251 is inserted into the first shaft portion 221, a second shaft sleeve 252 is inserted into the guide portion 222, a first rivet member 261 is rotatably inserted into the first shaft sleeve 251, a second rivet member 262 is rotatably inserted into the second shaft sleeve 252, and a second bearing 320 is fitted over the second rivet member 262. The axes of the first shaft portion 221, the first bushing 251, and the first rivet 261 all coincide with a second axis b, and the axes of the guide portion 222, the second bushing 252, and the second rivet 262 all coincide with a third axis c.

The wheel body 300 is sleeved on the second bearing 320, the second rivet member 262 penetrates through the wheel body 300 and the second bearing 320, the wheel body 300 and the second bearing 320 are riveted and positioned through the second rivet member 262, the inner ring of the second bearing 320 is abutted to the end surface of the second sleeve 252, and the outer ring of the second bearing 320 is embedded in the wheel body 300, so that the wheel body 300 is rotatably connected with the connecting rod member 220, and the rotation resistance of the wheel body 300 can be reduced. The second gear 310 and the wheel body 300 may be an integral molding structure; or a split structure, and the two are locked together by a fastener such as a screw.

The first gears 520 have second shaft portions 521, the second shaft portions 521 are rotatably inserted into the first shaft sleeve 251, the second shaft portions 521 of the two first gears 520 are abutted, the first rivet members 261 penetrate through the two first gears 520, and the two first gears 520 are fixedly riveted, so that the first gears 520 are rotatably arranged on the connecting rod member 220.

The toggle element 410 is rotatably disposed on the first wheel frame 100, the side wall of the toggle element 410 is provided with three locking slots 411 matched with the brake lever 420, the three locking slots 411 are arranged around the axis of the toggle element 410, the first brake assembly further includes a second elastic element 440, and the second elastic element 440 is disposed between the positioning block 430 and the wheel frame main body 210. When the brake lever 420 moves away from the toggle member 410, the brake lever 420 can be driven to move along the first axis a toward the toggle member 410 by the first elastic member 530.

In this way, the toggle member 410 is in contact transmission with the brake lever 420, the brake lever 420 has three working positions, and the brake lever 420 can reach the corresponding working positions during the movement along the first axis a. For example, when the end of the brake lever 420 abuts against the sidewall of the shallowest locking slot 411, the brake lever 420 is located at the first working position, the first stopping tooth portion 431 is engaged with the second stopping tooth portion 241, the braking tooth portion 511 is engaged with the first gear 520, the second wheel carrier 200 and the wheel body 300 are not rotatable, and the caster device is in a full-brake locking state; when the end of the brake lever 420 abuts against the side wall of the locking slot 411 of the middle depth, the brake lever 420 is in the second working position, the first stopping tooth portion 431 is disengaged from the second stopping tooth portion 241, the brake tooth portion 511 is also disengaged from the first gear 520, the first locking portion 432 is not inserted into the first locking hole 2421, and the second wheel carrier 200 and the wheel body 300 can both rotate; when the end of the brake lever 420 abuts against the side wall of the deepest locking slot 411, the brake lever 420 is in the third working position, the first locking part 432 is inserted into the first locking hole 2421, the rotation of the second wheel carrier 200 is limited, and the brake teeth 511 are disengaged from the first gear 520, and the wheel body 300 can rotate.

In some embodiments, the number of locking slots 411 may also be two, or more than four. When two, the end of the brake lever 420 abuts against the side wall of the toggle piece 410, the end of the brake lever 420 abuts against the side wall of the shallowest locking groove 411, and the end of the brake lever 420 abuts against the side wall of the deepest locking groove 411 respectively correspond to the brake lever 420 being in the first, second, and third working positions.

The first brake assembly further includes a third elastic member 450, the brake lever 420 has a limiting head 422, the third elastic member 450 is disposed between the limiting head 422 and the first wheel frame 100, and when the brake lever 420 moves along the first axis a away from the toggle member 410, the third elastic member 450 can drive the brake lever 420 to move along the first axis a toward the toggle member 410 for resetting.

Referring to fig. 2, 6 and 7, the first wheel carrier 100 includes a housing 110 and an inner cylinder 120, the toggle member 410 is rotatably inserted into the housing 110, the inner cylinder 120 is inserted into the housing 110, and the inner cylinder 120 is further rotatably inserted into the first mounting groove 214, such that the inner cylinder 120 is rotatably connected with the wheel carrier main body 210. The brake lever 420 is inserted into the inner cylinder 120, the positioning block 430 has a third locking portion 433, the cross-sectional profile of the third locking portion 433 is non-circular, and the inner cylinder 120 has a second locking hole 121 engaged with the third locking portion 433. By this structure, the rotation of the brake lever 420 with respect to the first wheel carrier 100 can be restricted.

The cross-sectional outlines of the first locking portion 432 and the third locking portion 433 may be polygonal, oval, kidney-shaped, semicircular, and the like, that is, the cross-sectional outlines of the first locking portion 432 and the third locking portion 433 may be formed by connecting more than three straight lines end to end, or formed by connecting at least two arcs with different radiuses end to end, or formed by connecting straight lines and curves end to end.

In some embodiments, the cross-sectional profile of the brake lever 420 can also be non-circular to limit rotation of the brake lever 420 relative to the first wheel carriage 100.

The outer casing 110 includes two cylindrical shells 111, and the two cylindrical shells 111 are fixedly connected to form a cavity capable of accommodating the inner cylinder 120.

In some embodiments, a plurality of transmission teeth may be further disposed on the circumferential side of the toggle member 410, and a rack may be disposed on the brake lever 420, and the rack may be engaged with the transmission teeth, so that when the toggle member 410 rotates, the brake lever 420 may be driven to move, i.e., the toggle member 410 is engaged with the brake lever 420 for transmission.

In the above embodiments, the first elastic member 530, the second elastic member 440, and the third elastic member 450 are provided as compression springs. And the structure of a rubber spring and the like can also be arranged.

In some embodiments, the first gear 520 and the second gear 310 may be replaced by a first synchronous pulley and a second synchronous pulley, the first synchronous pulley and the second synchronous pulley are wound with a synchronous belt, and a third gear for matching with the brake teeth 511 is disposed on the first synchronous pulley.

Of course, the present invention is not limited to the above-mentioned embodiments, and those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are included in the scope defined by the claims of the present application.

Claims (10)

1. A shock absorbing caster device, comprising:

the first wheel carrier is provided with a first brake component;

the second wheel frame comprises a wheel frame main body, a connecting rod piece and an elastic component, the wheel frame main body is connected with the first wheel frame so as to rotate around a first axis, a first stopping structure is arranged on the wheel frame main body, the connecting rod piece is connected with the wheel frame main body so as to swing around a second axis, the second axis is perpendicular to the first axis, and the elastic component is arranged between the connecting rod piece and the wheel frame main body;

the second brake assembly is arranged on the second wheel carrier and is linked with the first brake assembly;

the wheel body is connected with the connecting rod piece so as to be capable of rotating around a third axis, the third axis is parallel to the second axis, and a second stop structure is arranged on the wheel body;

when the first brake component acts, the first brake component can be matched with the first stop structure to limit the rotation of the wheel frame main body, and the second brake component can be matched with the second stop structure to limit the rotation of the wheel body.

2. The shock-absorbing caster device as claimed in claim 1, wherein the first brake assembly comprises a shifting member, a brake lever and a positioning block, the shifting member is in transmission connection with the brake lever to drive the brake lever to move along the first axis, the positioning block is fixedly arranged on the brake lever, and the positioning block is provided with a plurality of first stop teeth arranged around the first axis;

the first stop structure comprises a second stop tooth portion, the second stop tooth portion and the first stop tooth portion being aligned along the first axis;

the brake lever is movable along the first axis to move the first stop tooth portion into engagement with the second stop tooth portion and to engage the second brake assembly with the second stop structure to limit rotation of the wheel body.

3. The shock-absorbing caster device of claim 2, wherein said positioning block has a first locking portion, the cross-sectional profile of said first locking portion is non-circular, and said first locking portion and said first stop tooth portion are arranged along said first axis;

the first stopping structure further comprises a stopping piece arranged on the wheel frame main body, and a first stopping hole matched with the first stopping part is formed in the stopping piece.

4. The shock-absorbing caster device as claimed in claim 3, wherein the stopper is inserted into the wheel frame body, one of the side wall of the stopper and the wheel frame body is provided with a first stopper groove, and the other is provided with a first stopper portion, and the first stopper portion is provided in the first stopper groove.

5. The shock-absorbing caster device according to claim 1, 2 or 3, wherein the elastic member comprises an adhesive tape, the wheel carrier body is provided with a first shaft hole arranged along the second axis, a sidewall of the first shaft hole is provided with a first receiving groove, the link member is provided with a first shaft portion rotatably inserted into the first shaft hole, a sidewall of the first shaft portion is provided with a second receiving groove opposite to the first receiving groove, and the adhesive tape is inserted into the first receiving groove and the second receiving groove.

6. The shock-absorbing caster device according to claim 5, wherein the wheel frame body has a guide groove disposed around the second axis, the link member has a guide portion inserted into the guide groove, and the elastic member further comprises a shock-absorbing elastic member disposed on the wheel frame body, the shock-absorbing elastic member being located at an end portion of the guide groove.

7. The shock-absorbing caster device of claim 2, wherein said brake lever has a second locking portion thereon, said second brake assembly includes a brake block, a first gear and a first elastic member, said brake block is slidably disposed on said wheel carrier body, and one side of said brake block has a brake tooth portion and a stop surface engaged with said second locking portion, said second locking portion and said stop surface are arranged along said first axis, said first gear is rotatably disposed on said link member and arranged along said second axis, said first elastic member is disposed between the other side of said brake block and said wheel carrier body;

the second stop structure comprises a second gear fixedly connected with the wheel body, the second gear is arranged along the third axis, and the second gear is meshed with the first gear;

the brake block can engage the brake tooth portion with the first gear when moving along the wheel carrier body.

8. The shock-absorbing caster device as claimed in claim 2, wherein said toggle member is rotatably disposed on said first wheel frame, a side wall of said toggle member is provided with at least two locking grooves for engaging with said brake lever, and at least two of said locking grooves have different depths and are arranged around an axis of said toggle member; the first brake assembly further comprises a second elastic piece, and the second elastic piece is arranged between the positioning block and the wheel carrier main body and can drive the brake lever to move towards the shifting piece along the first axis.

9. The shock absorbing caster device of claim 8, wherein the first brake assembly further comprises a third resilient member, the brake lever has a stopper thereon, and the third resilient member is disposed between the stopper and the first wheel carrier to drive the brake lever to move along the first axis toward the toggle member.

10. The damping caster device according to claim 2 or 8, wherein the first wheel carrier includes a housing and an inner tube, the toggle member is rotatably inserted into the housing, the inner tube is inserted into the housing and rotatably connected to the second wheel carrier, the brake lever is slidably inserted into the inner tube, the positioning block has a third locking portion, the cross-sectional profile of the third locking portion is non-circular, and the inner tube has a second locking hole engaged with the third locking portion.

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