Shock-absorbing caster device

Abstract

The present invention discloses a shock-absorbing caster device, which includes a first wheel frame, a second wheel frame, a wheel body and a second brake assembly. A first brake assembly is arranged on the first wheel frame, the second wheel frame includes a wheel frame body, a connecting rod and an elastic assembly, the wheel frame body is connected to the first wheel frame and can rotate around a first axis, a first stop structure is arranged on the wheel frame body, the connecting rod is connected to the wheel frame body so as to be able to rotate around a second axis, the elastic assembly is arranged between the connecting rod and the wheel frame body, the second brake assembly is arranged on the second wheel frame, and the second brake assembly is linked to the first brake assembly. The wheel body is connected to the connecting rod so as to be able to rotate around a third axis. The wheel body and the connecting rod can swing to adapt to the ups and downs of the ground, avoid vibration of the equipment, and keep the equipment stable during movement; when the first brake assembly is actuated, the second brake assembly can be actuated to complete the brake locking of the caster device, which is convenient for the user's braking operation.

Description

Technical Field

[0001] The invention relates to the field of transportation technology, in particular to a caster device. Background Art

[0002] Some existing casters, in order to adapt to the movement of the equipment they carry, generally have multiple degrees of freedom of rotation. For example, the wheel body of some casters can rotate, and the wheel frame of the caster can also rotate relative to the equipment it carries. Usually, in order to lock the caster brake, two sets of brake devices need to be set on the caster, one set of brake devices is used to limit the rotation of the wheel body, and the other set of brake devices is used to limit the rotation of the wheel frame. The two sets of brake devices are set independently, and the user needs to operate the two sets of brake devices separately, which makes the user's braking operation inconvenient. In addition, during the movement of the equipment, the caster device often encounters uneven ground, causing the equipment to vibrate. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a shock-absorbing caster device, which can reduce the vibration of the equipment it carries and facilitate the user's braking operation.

[0004] A shock-absorbing caster device according to an embodiment of the present invention comprises: a first wheel frame, on which a first brake assembly is provided; a second wheel frame, the second wheel frame comprising a wheel frame body, a connecting rod and an elastic assembly, the wheel frame body being connected to the first wheel frame so as to be able to rotate around a first axis, a first stop structure being provided on the wheel frame body, the connecting rod being connected to the wheel frame body so as to be able to swing around a second axis, the second axis being perpendicular to the first axis, and the elastic assembly being arranged between the connecting rod and the wheel frame body; a second brake assembly, the second brake assembly being arranged on the second wheel frame and linked to the first brake assembly; a wheel body, the wheel body being connected to the connecting rod so as to be able to rotate around a third axis, the third axis being parallel to the second axis, and the wheel body having a second stop structure; when the first brake assembly is actuated, it can cooperate with the first stop structure to limit the rotation of the wheel frame body, and can make the second brake assembly cooperate with the second stop structure to limit the rotation of the wheel body.

[0005] A shock-absorbing caster device according to an embodiment of the present invention has at least the following beneficial effects: through the above structure, when encountering uneven ground, the wheel body and the connecting rod can swing accordingly to adapt to the ups and downs of the ground, avoid vibration of the equipment, and keep the equipment stable during movement; through the linkage between the second brake assembly and the first brake assembly, the second brake assembly can be activated when the first brake assembly is activated, thereby limiting the rotation of the second wheel frame relative to the first wheel frame and limiting the rotation of the wheel body relative to the second wheel frame, thereby completing the brake locking of the caster device, without the user having to operate the first brake assembly and the second brake assembly separately, thereby facilitating the user's brake operation.

[0006] According to some embodiments of the present invention, the first brake assembly includes a toggle member, a brake rod and a positioning block, the toggle member is transmission-connected to the brake rod so as to drive the brake rod to move along the first axis, the positioning block is fixed to the brake rod, and the fixed block has a plurality of first stopping teeth arranged around the first axis; the first stopping structure includes a second stopping tooth, and the second stopping tooth and the first stopping tooth are arranged along the first axis; when the brake rod moves along the first axis, the first stopping tooth can be moved to engage with the second stopping tooth, and the second brake assembly can cooperate with the second stopping structure to limit the rotation of the wheel body.

[0007] According to some embodiments of the present invention, the positioning block has a first locking portion, the cross-sectional outer contour of the first locking portion is non-circular, and the first locking portion and the first stopping tooth portion are arranged along the first axis; the first stopping structure also includes a stopping member arranged on the wheel frame body, and the stop member has a first locking hole that cooperates with the first locking portion.

[0008] According to some embodiments of the present invention, the stop member is inserted into the wheel frame body, and one of the side wall of the stop member and the wheel frame body is provided with a first limiting groove, and the other is provided with a first limiting portion, and the first limiting portion is provided in the first limiting groove.

[0009] According to some embodiments of the present invention, it is characterized in that the elastic component includes a rubber strip, the wheel frame body is provided with a first axial hole arranged along the second axis, the side wall of the first axial hole has a first receiving groove, the connecting rod has a first shaft portion rotatably inserted in the first axial hole, the side wall of the first shaft portion has a second receiving groove opposite to the first receiving groove, and the rubber strip is inserted in the first receiving groove and the second receiving groove.

[0010] According to some embodiments of the present invention, the wheel frame body has a guide groove arranged around the second axis, the connecting rod has a guide portion inserted in the guide groove, and the elastic component also includes a shock-absorbing elastic member provided on the wheel frame body, and the shock-absorbing elastic member is located at the end of the guide groove.

[0011] According to some embodiments of the present invention, the brake rod is provided with a second locking portion, 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 frame body, and one side of the brake block has a brake tooth portion and a stop surface matching 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, and the first elastic member is disposed between the other side of the brake block and the wheel frame body; the second stopping structure includes a second gear fixedly connected to the wheel body, the second gear is arranged along the third axis, and the second gear is meshed with the first gear; when the brake block moves along the wheel frame body, the brake tooth portion can be meshed with the first gear.

[0012] According to some embodiments of the present invention, the toggle member is rotatably disposed on the first wheel frame, and the side wall of the toggle member is provided with at least two locking grooves that cooperate with the brake rod, and the depths of the at least two locking grooves are different and are arranged around the axis of the toggle member; the first brake assembly also includes a second elastic member, and the second elastic member is disposed between the positioning block and the wheel frame body to be able to drive the brake rod to move along the first axis toward the toggle member.

[0013] According to some embodiments of the present invention, the first brake assembly further includes a third elastic member, the brake rod has a limit head, and the third elastic member is arranged between the limit head and the first wheel frame to be able to drive the brake rod to move along the first axis toward the toggle member.

[0014] According to some embodiments of the present invention, the first wheel frame includes an outer shell and an inner cylinder, the toggle member is rotatably inserted in the outer shell, the inner cylinder is inserted in the outer shell and is rotatably connected to the second wheel frame, the brake rod is slidably inserted in the inner cylinder, the positioning block is provided with a third locking portion, the cross-sectional outer contour of the third locking portion is non-circular, and the inner cylinder has a second locking hole that cooperates with the third locking portion.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 It is a structural diagram of an embodiment of a shock-absorbing caster device of the present invention;

[0018] Figure 2 for Figure 1 A cross-sectional view of the shock absorbing caster device shown in;

[0019] Figure 3 for Figure 2 A magnified view of part A;

[0020] Figure 4 for Figure 2 A magnified view of part B;

[0021] Figure 5 for Figure 1 Another cross-sectional view of the shock absorbing caster device shown in ;

[0022] Figure 6 for Figure 1 Exploded view of the shock absorbing caster assembly shown in;

[0023] Figure 7 is an exploded view of a first wheel frame and a first brake assembly;

[0024] Figure 8 Exploded view of the shock absorbing caster assembly after removing the first wheel frame and the first brake assembly.

[0025] Reference numerals:

[0026] The first wheel frame 100, the outer shell 110, the cylinder shell 111, the inner cylinder 120, the second locking hole 121, the second wheel frame 200, the wheel frame body 210, the first limiting portion 211, the first shaft hole 212, the first containing groove 2121, the guide groove 213, the first installation groove 214, the first bearing 215, the connecting rod 220, the first shaft portion 221, the second containing groove 2211, the guide portion 222, the rubber strip 231, the shock-absorbing elastic member 232, the first stopping structure 240, the second stopping tooth portion 241, the stopping member 242, the first locking hole 2421, the first limiting groove 242 2. first sleeve 251, second sleeve 252, first rivet 261, second rivet 262, wheel 300, second gear 310, second bearing 320, toggle member 410, locking groove 411, brake lever 420, second locking portion 421, limit head 422, positioning block 430, first stopping tooth portion 431, first locking portion 432, third locking portion 433, second elastic member 440, third elastic member 450, brake block 510, brake tooth portion 511, stopping surface 512, first gear 520, second shaft portion 521, first elastic member 530

[0027] First axis a, second axis b, third axis c DETAILED DESCRIPTION

[0028] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0029] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do 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 therefore should not be understood as a limitation on the present invention.

[0030] In the description of the present invention, if there is a description of first and second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0031] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0032] like Figures 1 to 8 As shown, a shock-absorbing caster device according to an embodiment of the present invention comprises 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 wheel frame 100 is used to connect equipment that needs to be loaded.

[0033] The first wheel frame 100 is provided with the first brake assembly. The second wheel frame 200 includes a wheel frame body 210, a connecting rod 220 and an elastic assembly. The wheel frame body 210 is connected to the first wheel frame 100 and can rotate around the first axis a, that is, the wheel frame body 210 is rotatably connected to the first wheel frame 100. A first stopper structure 240 is provided on the wheel frame body 210. The connecting rod 220 is connected to the wheel frame body 210 so as to rotate around the second axis b, that is, the connecting rod 220 is rotatably connected to the wheel frame body 210, the second axis b is perpendicular to the first axis a, and the elastic assembly is provided between the connecting rod 220 and the wheel frame body 210. The second brake assembly is provided on the second wheel frame 200, and the second brake assembly is linked to the first brake assembly. The wheel body 300 is connected to the connecting rod 220 so as to rotate around the third axis c, the third axis c is parallel to the second axis b, and the wheel body 300 has a second stopper structure.

[0034] The caster device is usually installed at the bottom of the equipment. When encountering an uneven ground, the wheel body 300 and the connecting rod 220 can swing accordingly to adapt to the ups and downs of the ground, avoid vibration of the equipment, and keep the equipment stable during movement; the second brake assembly is linked with the first brake assembly, and when the first brake assembly is actuated, the second brake assembly can be actuated, thereby limiting the second wheel frame 200 from rotating relative to the first wheel frame 100 and limiting the wheel body 300 from rotating relative to the second wheel frame 200, thereby completing the brake locking of the caster device. The user does not need to operate the first brake assembly and the second brake assembly separately, which is convenient for the user's braking operation.

[0035] Reference Figures 2 to 7 The first brake assembly includes a toggle member 410, a brake rod 420 and a positioning block 430. The toggle member 410 is transmission-connected to the brake rod 420, and the brake rod 420 is slidably disposed on the first wheel frame 100. The toggle member 410 can drive the brake rod 420 to move along the first axis a. The positioning block 430 is fixedly disposed on the brake rod 420, and the fixed block has a plurality of first stop teeth 431, and these first stop teeth 431 are arranged around the first axis a. The first stop structure 240 includes a second stop tooth 241, and the second stop tooth 241 and the first stop tooth 431 are arranged along the first axis a.

[0036] The toggle member 410 can drive the brake lever 420 to move along the first axis a. When the brake lever 420 moves, the first stop tooth portion 431 can be driven to move to a position meshing with the second stop tooth portion 241. When the first stop tooth portion 431 is meshed with the second stop tooth portion 241, the second wheel frame 200 can be restricted from rotating relative to the first wheel frame 100. In addition, when the brake lever 420 moves to a position where the first stop tooth portion 431 can be driven to move to a position meshing with the second stop tooth portion 241, the second brake assembly can also be activated to cooperate with the second stop structure to restrict the wheel body 300 from rotating relative to the second wheel frame 200.

[0037] The positioning block 430 and the brake rod 420 may be an integrally formed structure; or they may be a split structure, that is, the positioning block 430 is sleeved on the brake rod 420 and is locked on the brake rod 420 by fasteners such as screws.

[0038] 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 stop tooth portion 431 are arranged along the first axis a. The first stop structure 240 also includes a stopper 242 disposed on the wheel frame body 210, and the stopper 242 has a first locking hole 2421 that matches the first locking portion 432.

[0039] As described above, the brake rod 420 moves along the first axis a. When the first locking portion 432 is inserted into the first locking hole 2421, the first stop tooth portion 431 has not moved to a position where it meshes with the second stop tooth portion 241. At this time, the second wheel frame 200 can be locked to limit the rotation of the second wheel frame 200 relative to the first wheel frame 100. 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. In this way, the rotation direction of the wheel body 300 can be locked, and the moving direction of the caster device can be fixed. When the first stop tooth portion 431 moves to a position where it meshes with the second stop tooth portion 241, the second wheel frame 200 and the wheel body 300 can both be locked to limit the rotation of the second wheel frame 200 and the wheel body 300, and the caster device can be fully locked.

[0040] The stop member 242 is inserted into the wheel frame body 210, and a first limiting groove 2422 is set on the side wall of the stop member 242. A first limiting portion 211 is set on the second wheel frame 200. The first limiting portion 211 is set in the first limiting groove 2422, so as to limit the rotation of the stop member 242 relative to the wheel frame body 210.

[0041] It is understandable that, in some embodiments, the first limiting groove 2422 may be further disposed on the wheel frame body 210 , and correspondingly, the first limiting portion 211 may be disposed on the stopper 242 .

[0042] In some embodiments, the stopper 242 and the wheel frame body 210 may also be locked together by fasteners such as screws and rivets to limit the rotation of the stopper 242 relative to the wheel frame body 210; or the stopper 242 and the wheel frame body 210 are configured as an integrally formed structure.

[0043] The wheel frame body 210 is provided with a first mounting groove 214, and the first wheel frame 100 is rotatably inserted into the first mounting groove 214, so that the wheel frame body 210 is rotatably connected with the first wheel frame 100, and the aforementioned first axis a passes through the cross-sectional center of the first mounting groove 214. A first bearing 215 is also provided in the first mounting groove 214, and the first bearing 215 is located between the first wheel frame 100 and the wheel frame body 210 to reduce the rotation 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.

[0044] In some embodiments, the first stopping tooth portion 431 may also be replaced by a truncated pyramid or a prism, and correspondingly, the second stopping tooth portion 241 may be replaced by a pyramid hole or a prism hole.

[0045] Reference Figure 2 , Figure 6 and Figure 8 The elastic component includes a rubber strip 231 and a shock-absorbing elastic member 232. A first shaft hole 212 arranged along the second axis b is provided on the wheel frame body 210, and a first shaft portion 221 is provided on the connecting rod 220. The first shaft portion 221 is rotatably inserted in the first shaft hole 212. A first receiving groove 2121 is provided on the side wall of the first shaft hole 212, and a second receiving groove 2211 is provided on the side wall of the first shaft portion 221 opposite to the first receiving groove 2121. The rubber strip 231 is inserted in the first receiving groove 2121 and the second receiving groove 2211, that is, a part of the rubber strip 231 is placed in the connecting rod 220, and a part of the rubber strip 231 is placed in the side wall of the first shaft hole 212.

[0046] Generally, a plurality of caster devices are provided at the bottom of the device. When in use, the wheel body 300 rolls along the ground. Under the pressure of 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 wheel 300 encounters a protrusion on the ground, the wheel 300 is pressed against the protrusion, the connecting rod 220 and the wheel 300 swing upward, and the rubber strip 231 is further deformed to keep the device balanced. After the wheel 300 bypasses the protrusion, the connecting rod 220 and the wheel 300 swing downward under the action of their own weight and the elastic force of the rubber strip 231. When a wheel 300 encounters a depression on the ground, the wheel 300 and the connecting rod 220 swing downward under the action of their own weight and the elastic force of the rubber strip 231, so that the wheel 300 contacts the bottom surface of the depression, so that the device can maintain balance. After the wheel 300 bypasses the depression, the pressure of the device weight can make the wheel 300 and the connecting rod 220 swing upward. In this way, the caster device can adapt to the protrusions and depressions on the ground, keep the device stable during movement, and avoid vibration of the device.

[0047] The wheel frame body 210 has a guide groove 213 arranged around the second axis b, the connecting rod 220 has a guide portion 222 inserted in the guide groove 213, and the shock-absorbing elastic member 232 is provided on the wheel frame body 210, and the shock-absorbing elastic member 232 is located at the 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 the shock-absorbing elastic member 232, and the shock-absorbing elastic member 232 can play a buffering role to prevent the connecting rod 220 from rigidly colliding with the wheel frame body 210.

[0048] The shock-absorbing elastic member 232 is configured as a rubber block. Of course, the shock-absorbing elastic member 232 can also be configured as a compression spring, a spring sheet, or other structures.

[0049] In some embodiments, a torsion spring may be provided for the elastic component, and the torsion spring is arranged along the first axis a, with one torsion arm of the torsion spring abutting against the link member 220 and the other torsion arm abutting against the wheel frame body 210. When the link member 220 swings, the torsion spring can drive the link member 220 to swing back to its original position.

[0050] Reference Figures 2 to 8, the brake rod 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 arranged on the wheel frame body 210, and one side of the brake block 510 has a brake tooth portion 511 and a stop surface 512 matched with the second locking portion 421, the second locking portion 421 and the stop surface 512 are arranged along the first axis a, the first gear 520 is rotatably arranged on the connecting rod 220, and the first gear 520 is arranged along the second axis b, that is, the axis of the first gear 520 coincides with the second axis b. The first elastic member 530 is arranged between the other side of the brake block 510 and the wheel frame body 210. The second stop structure includes a second gear 310 fixedly connected to the wheel body 300, the second gear 310 is arranged along the third axis c, that is, 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.

[0051] When the caster device is in use, the second locking portion 421 abuts against the stop surface 512 to support the brake block 510 and limit the movement of the brake block 510. When braking is required, the brake lever 420 is driven to move by the toggle member 410 so that the first stop tooth portion 431 is meshed 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 meshed with the first gear 520, thereby limiting the rotation of the first gear 520 and the second gear 310, and further limiting the rotation of the wheel body 300. That is, when the first stop tooth portion 431 moves to mesh with the second stop tooth portion 241, the brake block 510 can also move to a position where the brake tooth portion 511 is meshed with the first gear 520.

[0052] Reference Figure 5 As an embodiment, the wheel body 300 is provided in two and is disposed on both sides of the wheel frame body 210, and the connecting rod 220 and the first gear 520 are both provided in two. The two first gears 520 are disposed on both sides of the two connecting rods 220. A first sleeve 251 is provided through the first shaft portion 221, and a second sleeve 252 is provided through the guide portion 222. A first rivet member 261 is rotatably provided through the first sleeve 251, and a second rivet member 262 is rotatably provided through the second sleeve 252. A second bearing 320 is sleeved on the second rivet member 262. The axes of the first shaft portion 221, the first sleeve 251 and the first rivet member 261 all coincide with the second axis b, and the axes of the guide portion 222, the second sleeve 252 and the second rivet member 262 all coincide with the third axis c.

[0053] The wheel body 300 is sleeved on the second bearing 320, and the second rivet member 262 is penetrated through the wheel body 300 and the second bearing 320. The wheel body 300 and the second bearing 320 are riveted and positioned by the second rivet member 262. The inner ring of the second bearing 320 stops against 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 as to rotatably connect the wheel body 300 and the connecting rod member 220, and reduce the rotation resistance of the wheel body 300. The second gear 310 and the wheel body 300 can be an integrally formed structure; or a split structure, and the two are locked together by fasteners such as screws.

[0054] The first gear 520 has a second shaft portion 521, which is rotatably inserted into the first sleeve 251, and the second shaft portions 521 on the two first gears 520 are abutted against each other. The first rivet member 261 is passed through the two first gears 520 to rivet the two first gears 520 so that the first gear 520 is rotatably arranged on the connecting rod member 220.

[0055] The toggle member 410 is rotatably disposed on the first wheel frame 100, and the side wall of the toggle member 410 is provided with three locking grooves 411 that cooperate with the brake rod 420, and the three locking grooves 411 are arranged around the axis of the toggle member 410. The first brake assembly also includes a second elastic member 440, and the second elastic member 440 is disposed between the positioning block 430 and the wheel frame body 210. When the brake rod 420 moves away from the toggle member 410, the brake rod 420 can be driven to move toward the toggle member 410 along the first axis a through the first elastic member 530.

[0056] In this way, the toggle member 410 and the brake rod 420 are in contact and transmission, and the brake rod 420 has three working positions. The brake rod 420 can reach the corresponding working position during the movement along the first axis a. For example, when the end of the brake rod 420 stops against the side wall of the shallowest locking groove 411, the brake rod 420 is located in the first working position, the first stop tooth portion 431 is meshed with the second stop tooth portion 241, and the brake tooth portion 511 is meshed with the first gear 520, the second wheel frame 200 and the wheel body 300 are both unable to rotate, and the caster device is in a full brake locking state; when the end of the brake rod 420 stops against the side wall of the locking groove 411 of the middle depth, the brake rod 420 is in the second working position, the first stop tooth portion 431 is meshed with the second stop tooth portion 241, and the brake tooth portion 511 is meshed with the first gear 520. The movable tooth portion 241 is disengaged, 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 frame 200 and the wheel body 300 can both rotate; when the end of the brake lever 420 stops against the side wall of the deepest locking groove 411, the brake lever 420 is in the third working position, the first locking portion 432 is inserted into the first locking hole 2421, limiting the rotation of the second wheel frame 200, and the brake tooth portion 511 is disengaged from the first gear 520, and the wheel body 300 can rotate.

[0057] In some embodiments, the number of the locking grooves 411 can also be set to two, or more than four. When set to two, the end of the brake lever 420 stops against the side wall of the toggle member 410, the end of the brake lever 420 stops against the side wall of the shallowest locking groove 411, and the end of the brake lever 420 stops against the side wall of the deepest locking groove 411, respectively corresponding to the brake lever 420 being in the first, second, and third working positions.

[0058] The first brake assembly also includes a third elastic member 450, and the brake rod 420 has a limit head 422. The third elastic member 450 is arranged between the limit head 422 and the first wheel frame 100. When the brake rod 420 moves along the first axis a away from the toggle member 410, the third elastic member 450 can drive the brake rod 420 to move along the first axis a toward the toggle member 410 to reset.

[0059] Reference Figure 2 , Figure 6 and Figure 7 The first wheel frame 100 includes an outer shell 110 and an inner cylinder 120, the toggle member 410 is rotatably inserted in the outer shell 110, the inner cylinder 120 is inserted in the outer shell 110, and the inner cylinder 120 is also rotatably inserted in the first mounting groove 214, so that the inner cylinder 120 is rotatably connected to the wheel frame body 210. The brake lever 420 is inserted in the inner cylinder 120, and the positioning block 430 has a third locking portion 433, the cross-sectional outer profile of the third locking portion 433 is non-circular, and the inner cylinder 120 has a second locking hole 121 that matches the third locking portion 433. Through this structure, the brake lever 420 can be limited to rotate relative to the first wheel frame 100.

[0060] Among them, the cross-sectional outline of the first locking portion 432 and the third locking portion 433 can be polygonal, or can be elliptical, waist-shaped, semicircular, etc., that is, the cross-sectional outline of the first locking portion 432 and the third locking portion 433 can be composed of more than three straight lines connected end to end, or composed of at least two arcs with different radii connected end to end, or composed of a straight line and a curve connected end to end.

[0061] In some embodiments, the cross-sectional profile of the brake lever 420 may also be non-circular to limit the rotation of the brake lever 420 relative to the first wheel frame 100 .

[0062] The outer shell 110 includes two cylindrical shells 111 , which are fixedly connected to form a cavity that can accommodate the inner cylinder 120 .

[0063] In some embodiments, a plurality of transmission teeth may be provided on the peripheral side of the toggle member 410, and a rack may be provided on the brake lever 420, the rack being meshed with the transmission teeth, and when the toggle member 410 rotates, the brake lever 420 may be driven to move, that is, the toggle member 410 and the brake lever 420 are meshed for transmission.

[0064] In the above embodiments, the first elastic member 530, the second elastic member 440 and the third elastic member 450 are all configured as compression springs, and may also be configured as rubber springs or other structures.

[0065] In some embodiments, the first gear 520 and the second gear 310 can also be replaced by a first synchronous pulley and a second synchronous pulley, which are wound with synchronous belts, and a third gear for matching the brake tooth portion 511 is provided on the first synchronous pulley.

[0066] Of course, the present invention is not limited to the above-mentioned embodiments, and those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the present invention, and these equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A shock-absorbing caster device, characterized in that: include: a first wheel frame, wherein the first wheel frame is provided with a first brake assembly; a second wheel frame, the second wheel frame comprising a wheel frame body, a connecting rod and an elastic component, the wheel frame body being connected to the first wheel frame so as to be able to rotate around a first axis, the wheel frame body being provided with a first stop structure, the connecting rod being connected to the wheel frame body so as to be able to swing around a second axis, the second axis being perpendicular to the first axis, the elastic component being provided between the connecting rod and the wheel frame body; a second brake assembly, the second brake assembly being disposed on the second wheel frame and being linked to the first brake assembly; a wheel body, the wheel body being connected to the connecting rod so as to be rotatable about a third axis, the third axis being parallel to the second axis, and the wheel body being provided with a second stop structure; When the first brake assembly is in operation, it can cooperate with the first stop structure to limit the rotation of the wheel frame body, and the second brake assembly can cooperate with the second stop structure to limit the rotation of the wheel body; The first brake assembly includes a toggle member, a brake rod and a positioning block, the toggle member is transmission-connected with the brake rod so as to drive the brake rod to move along the first axis, the positioning block is fixed to the brake rod, and the fixed block has a plurality of first stopping teeth arranged around the first axis; the first stopping structure includes a second stopping tooth, and the second stopping tooth and the first stopping tooth are arranged along the first axis; when the brake rod moves along the first axis, the first stopping tooth can be moved to mesh with the second stopping tooth, and the second brake assembly cooperates with the second stopping structure to limit the rotation of the wheel body; The positioning block has a first locking portion, the cross-sectional outer profile of the first locking portion is non-circular, and the first locking portion and the first stopping tooth portion are arranged along the first axis; the first stopping structure also includes a stopping piece provided on the wheel frame body, and the stopping piece has a first locking hole matched with the first locking portion; 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 limiting groove, and the other is provided with a first limiting portion, and the first limiting portion is provided in the first limiting groove; The elastic component includes a rubber strip, the wheel frame body is provided with a first shaft hole arranged along the second axis, the side wall of the first shaft hole has a first receiving groove, the connecting rod has a first shaft portion rotatably inserted in the first shaft hole, the side wall of the first shaft portion has a second receiving groove opposite to the first receiving groove, and the rubber strip is inserted in the first receiving groove and the second receiving groove; The wheel frame body has a guide groove arranged around the second axis, the connecting rod has a guide portion inserted into the guide groove, and the elastic component further includes a shock-absorbing elastic member provided on the wheel frame body, and the shock-absorbing elastic member is located at an end of the guide groove; The brake lever is provided with a second locking portion, the second brake assembly comprises a brake block, a first gear and a first elastic member, the brake block is slidably arranged on the wheel frame body, and one side of the brake block has a brake tooth portion and a stop surface matched with the second locking portion, the second locking portion and the stop surface are arranged along the first axis, the first gear is rotatably provided on the connecting rod and arranged along the second axis, and the first elastic member is provided between the other side of the brake block and the wheel frame body; the second stopping structure comprises a second gear fixedly connected to the wheel body, the second gear is arranged along the third axis, and the second gear is meshed with the first gear; when the brake block moves along the wheel frame body, the brake tooth portion can be meshed with the first gear; The toggle member is rotatably disposed on the first wheel frame, and the side wall of the toggle member is provided with at least two locking grooves matched with the brake lever, and the depths of the at least two locking grooves are different and arranged around the axis of the toggle member; The second brake assembly is linked with the first brake assembly, so that the second brake assembly can be activated when the first brake assembly is activated, thereby limiting the rotation of the second wheel frame relative to the first wheel frame and limiting the rotation of the wheel body relative to the second wheel frame, thereby completing the brake locking of the caster device.

2. A shock-absorbing caster device according to claim 1, characterized in that: The first brake assembly further includes a second elastic member, which is disposed between the positioning block and the wheel frame body so as to be able to drive the brake rod to move along the first axis toward the toggle member.

3. A shock-absorbing caster device according to claim 2, characterized in that: The first brake assembly further includes a third elastic member. The brake rod is provided with a limit head. The third elastic member is arranged between the limit head and the first wheel frame to drive the brake rod to move along the first axis toward the toggle member.

4. A shock-absorbing caster device according to claim 1 or 2, characterized in that: The first wheel frame includes an outer shell and an inner cylinder, the toggle member is rotatably inserted in the outer shell, the inner cylinder is inserted in the outer shell and is rotatably connected to the second wheel frame, the brake rod is slidably inserted in the inner cylinder, the positioning block is provided with a third locking portion, the cross-sectional outer contour of the third locking portion is non-circular, and the inner cylinder has a second locking hole that cooperates with the third locking portion.

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